oogonia

Summary

Summary: Euploid female germ cells of an early stage of OOGENESIS, derived from primordial germ cells during ovarian differentiation. Oogonia undergo MEIOSIS and give rise to haploid OOCYTES

Top Publications

  1. ncbi From oogonia to mature oocytes: inactivation of the maternal centrosome in humans
    A Henry Sathananthan
    Monash Institute of Medical Research, Monash University, Melbourne, Australia
    Microsc Res Tech 69:396-407. 2006
  2. ncbi No evidence for the presence of oogonia in the human ovary after their final clearance during the first two years of life
    A G Byskov
    Laboratory of Reproductive Biology, Section 5712, University Hospital of Copenhagen, Rigshospitalet, Section 5712, Blegdamsvej 9, DK 2100 Copenhagen, Denmark
    Hum Reprod 26:2129-39. 2011
  3. ncbi The number of oogonia and somatic cells in the human female embryo and fetus in relation to whether or not exposed to maternal cigarette smoking
    M C Lutterodt
    Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
    Hum Reprod 24:2558-66. 2009
  4. ncbi A fossil peronosporomycete oogonium with an unusual surface ornament from the Carboniferous of France
    Michael Krings
    Department für Geo und Umweltwissenschaften, Paläontologie und Geobiologie, Ludwig Maximilians Universitat, and Bayerische Staatssammlung für Paläontologie und Geologie, Richard Wagner Straße 10, 80333 Munich, Germany
    Fungal Biol 114:446-50. 2010
  5. ncbi Production of oogonia and oospores of Leptolegnia chapmanii Seymour (Straminipila: Peronosporomycetes) in Aedes aegypti (L.) larvae at different temperatures
    S A Pelizza
    Centro de Estudios Parasitológicos y de Vectores CEPAVE CCT CONICET La Plata UNLP, 2 N masculine 584, La Plata, Argentina
    Mycopathologia 169:71-4. 2010
  6. pmc RSPO1/β-catenin signaling pathway regulates oogonia differentiation and entry into meiosis in the mouse fetal ovary
    Anne Amandine Chassot
    INSERM, U636, Nice, France
    PLoS ONE 6:e25641. 2011
  7. ncbi [After tumor therapy what possibilities exist for preservation of female fertility?]
    Inge Kelm-Kahl
    Dtsch Med Wochenschr 129:1053-4. 2004
  8. ncbi Number of germ cells and somatic cells in human fetal ovaries during the first weeks after sex differentiation
    E Bendsen
    Fertility Clinic, Department of Obstetrics and Gynaecology, University Hospital of Odense, Sdr Boulevard 29, 5000 Odense C, Denmark
    Hum Reprod 21:30-5. 2006
  9. ncbi Establishment of oocyte population in the fetal ovary: primordial germ cell proliferation and oocyte programmed cell death
    Massimo De Felici
    Department of Public Health and Cell Biology, Section of Histology and Embryology, University of Rome Tor Vergata, Rome, Via Montpellier 1, 00173 Rome, Italy
    Reprod Biomed Online 10:182-91. 2005
  10. ncbi Formation of ovarian follicles during fetal development in sheep
    Heywood R Sawyer
    Animal Reproduction and Biotechnology Laboratory, Foothills Campus, Colorado State University, Fort Collins, CO 80523, USA
    Biol Reprod 66:1134-50. 2002

Detail Information

Publications194 found, 100 shown here

  1. ncbi From oogonia to mature oocytes: inactivation of the maternal centrosome in humans
    A Henry Sathananthan
    Monash Institute of Medical Research, Monash University, Melbourne, Australia
    Microsc Res Tech 69:396-407. 2006
    The fine structure of human oogonia and growing oocytes has been reviewed in fetal and adult ovaries...
  2. ncbi No evidence for the presence of oogonia in the human ovary after their final clearance during the first two years of life
    A G Byskov
    Laboratory of Reproductive Biology, Section 5712, University Hospital of Copenhagen, Rigshospitalet, Section 5712, Blegdamsvej 9, DK 2100 Copenhagen, Denmark
    Hum Reprod 26:2129-39. 2011
    Conflicting results of studies on mouse and human have either verified or refuted the presence of oogonia/primordial germ cells in the post-natal ovary...
  3. ncbi The number of oogonia and somatic cells in the human female embryo and fetus in relation to whether or not exposed to maternal cigarette smoking
    M C Lutterodt
    Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
    Hum Reprod 24:2558-66. 2009
    ..or compounds of cigarette smoke is associated with serious reproductive hazards such as apoptotic death of oogonia in murine offspring and decreased fecundability in human offspring...
  4. ncbi A fossil peronosporomycete oogonium with an unusual surface ornament from the Carboniferous of France
    Michael Krings
    Department für Geo und Umweltwissenschaften, Paläontologie und Geobiologie, Ludwig Maximilians Universitat, and Bayerische Staatssammlung für Paläontologie und Geologie, Richard Wagner Straße 10, 80333 Munich, Germany
    Fungal Biol 114:446-50. 2010
    ..This fossil represents only the third record of an unequivocal peronosporomycete from the Carboniferous, and thus provides important details about the evolutionary history of this group of organisms...
  5. ncbi Production of oogonia and oospores of Leptolegnia chapmanii Seymour (Straminipila: Peronosporomycetes) in Aedes aegypti (L.) larvae at different temperatures
    S A Pelizza
    Centro de Estudios Parasitológicos y de Vectores CEPAVE CCT CONICET La Plata UNLP, 2 N masculine 584, La Plata, Argentina
    Mycopathologia 169:71-4. 2010
    ..around the world, they were made on zoospores and a very little or even nothing is known about the sexual stage (oogonia and oospores), which allows L. chapmanii to remain in the environment when conditions are not favorable...
  6. pmc RSPO1/β-catenin signaling pathway regulates oogonia differentiation and entry into meiosis in the mouse fetal ovary
    Anne Amandine Chassot
    INSERM, U636, Nice, France
    PLoS ONE 6:e25641. 2011
    ..Our results demonstrate that RSPO1/β-catenin signaling is involved in meiosis in fetal germ cells and contributes to the cellular decision of germ cells to differentiate into oocyte or sperm...
  7. ncbi [After tumor therapy what possibilities exist for preservation of female fertility?]
    Inge Kelm-Kahl
    Dtsch Med Wochenschr 129:1053-4. 2004
  8. ncbi Number of germ cells and somatic cells in human fetal ovaries during the first weeks after sex differentiation
    E Bendsen
    Fertility Clinic, Department of Obstetrics and Gynaecology, University Hospital of Odense, Sdr Boulevard 29, 5000 Odense C, Denmark
    Hum Reprod 21:30-5. 2006
    ..This study presents the number of germ cells and somatic cells in human fetal ovaries during week 6 to week 9 post conception, i.e. the first weeks following sex differentiation of the gonads...
  9. ncbi Establishment of oocyte population in the fetal ovary: primordial germ cell proliferation and oocyte programmed cell death
    Massimo De Felici
    Department of Public Health and Cell Biology, Section of Histology and Embryology, University of Rome Tor Vergata, Rome, Via Montpellier 1, 00173 Rome, Italy
    Reprod Biomed Online 10:182-91. 2005
    ....
  10. ncbi Formation of ovarian follicles during fetal development in sheep
    Heywood R Sawyer
    Animal Reproduction and Biotechnology Laboratory, Foothills Campus, Colorado State University, Fort Collins, CO 80523, USA
    Biol Reprod 66:1134-50. 2002
    ..Conceptual models detailing the chronology of developmental events involved in the formation of primordial follicles in sheep are discussed...
  11. ncbi O-ethylthymidine adducts are the most relevant damages for mutation induced by N-ethyl-N-nitrosourea in female germ cells of Drosophila melanogaster
    L Alvarez
    Departamento de Biologia Funcional e Instituto Universitario de Oncologia del Principado de Asturias, Area de Genetica, Universidad de Oviedo, Spain
    Environ Mol Mutagen 40:143-52. 2002
    ....
  12. ncbi Light and electron microscopy oogenesis in matrinxã, Brycon cephalus
    E Romagosa
    Research Center in Reproduction and Larviculture, Fishery Institute, APTA, SAA, Sao Paulo, SP, Brazil
    J Submicrosc Cytol Pathol 34:425-31. 2002
    ..The ovulation of females matrinxã, required hormonal stimulation and this occurred 6 and 8 h after the second application...
  13. ncbi Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; Synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure
    Mario Aldo Ravaglia
    Laboratorio de Embriología Animal, Departamento de Biologia, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
    Biocell 26:325-37. 2002
    ..The complete oogenesis process is divided into four stages: oogonia, primary growth, cortical alveoli and vitellogenesis...
  14. ncbi Germ cell development in Meishan and White Composite gilts
    Susan A McCoard
    United States Department of Agriculture, Agricultural Research Service, Roman L Hruska U S Meat Animal Research Center, Clay Center, NE 68933, USA
    Anim Reprod Sci 77:85-105. 2003
    ..These observations highlight important developmental events during late fetal and early postnatal life that prepare the ovarian environment for early onset of puberty and subsequent ovulation in MS gilts...
  15. ncbi Follicular diameter range based on morphological features in Synbranchus marmoratus (Bloch, 1795) (Teleostei, Synbranchiformes, Synbranchidae) from the South-central region of Brazil
    Maria Angélica Spadella
    Departamento de Morfologia, Instituto de Biociencias, Universidade Estadual Paulista, Campus de Botucatu, Distrito de Rubiao Junior, S N, CEP 18 618 000, CX 510 Botucatu, Sao Paulo, Brasil
    Tissue Cell 37:91-100. 2005
    ..These data make available new information on the reproductive biology of Synbranchidae...
  16. ncbi Effects of luteinizing hormone treatment on oogenesis in ovarian germ cells of the chick (Gallus domesticus)
    Ma Genoveva González-Morán
    Laboratorio de Biología de la Reproducción Animal, Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, Av Universidad 3000, Col Copilco el Bajo, Deleg Coyoacan, Mexico, Mexico
    Domest Anim Endocrinol 33:154-66. 2007
    ..number of germ cells was not affected by the LH treatment, but significant differences existed in the number of oogonia and oocytes between the ovaries of control and LH-treated chicks...
  17. ncbi Somatic pairing, endomitosis and chromosome aberrations in snakes (Viperidae and Colubridae)
    Maria Luiza Beçak
    Laboratorio de Genetica, Instituto Butantan, Sao Paulo, SP, 05503 900, Brasil
    An Acad Bras Cienc 75:285-300. 2003
    ..insularis (Viperidae) was studied in undistorted radial metaphases of uncultured cells (spermatogonia and oogonia) not subjected to spindle inhibitors...
  18. ncbi Mature oocytes derived from purified mouse fetal germ cells
    Tingting Qing
    Laboratory of Stem Cell and Regeneration Biology, College of Life Sciences, Peking University, Beijing 100871, People s Rebublic of China
    Hum Reprod 23:54-61. 2008
    ..The purpose of this present study is to explore whether purified fetal germ cells are able to differentiate into mature oocytes through an in vivo grafting procedure...
  19. ncbi Number of ovarian follicles in human fetuses with the 45,X karyotype
    Karine Reynaud
    Academisch Ziekenhuis van de Vrije Universiteit Brussel, Brussels, Belgium
    Fertil Steril 81:1112-9. 2004
    ..To evaluate the numbers of ovarian follicles during fetal life in the gonads of human female fetuses with the 45,X karyotype (Turner syndrome, TS) and to compare them with those from age-matched 46,XX fetuses...
  20. ncbi Continuing primordial germ cell differentiation in the mouse embryo is a cell-intrinsic program sensitive to DNA methylation
    Danielle M Maatouk
    Department of Molecular Genetics and Microbiology, University of Florida, P O Box 10266, Gainesville, FL 32610 0266, USA
    Dev Biol 258:201-8. 2003
    ..These results suggest that genomic demethylation of proliferative phase primordial germ cells is a mechanism by which germ cell maturation is coordinated...
  21. ncbi Oogenesis in pig ovaries during the prenatal period: ultrastructure and morphometry
    Zofia Bielanska-Osuchowska
    Department of Histology and Embryology, Warsaw Agricultural University, ul Nowoursynowska 159, 02 776 Warszawa, Poland
    Reprod Biol 6:161-93. 2006
    ..At the ultrastructural level there are no differences between the primordial germ cells and oogonia, but oogonia are connected with the intercellular bridges...
  22. ncbi ayk1, a novel mammalian gene related to Drosophila aurora centrosome separation kinase, is specifically expressed during meiosis
    A Yanai
    Department of Life Sciences, Bar Ilan University, Ramat Gan, Israel
    Oncogene 14:2943-50. 1997
    ..These results suggest that the pathways controlling chromosome segregation are evolutionary conserved, and that similar control mechanisms operate in mitosis and meiosis...
  23. ncbi Pattern of expression of immune-relevant genes in the gonad of a teleost, the gilthead seabream (Sparus aurata L.)
    E Chaves-Pozo
    Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, Campus Universitario de Espinardo, 30100 Murcia, Spain
    Mol Immunol 45:2998-3011. 2008
    ..These data suggest that, as occurs in mammals, there is a critical balance between immune molecules and that these may play an essential role in the orchestration of gametogenesis and the maintenance of gonad tissue homeostasis in fish...
  24. ncbi Germ cell nuclear antigen (GCNA1) expression does not require a gonadal environment or steroidogenic factor 1: examination of GCNA1 in ectopic germ cells and in Ftz-F1 null mice
    D Wang
    Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City 66160 7400, USA
    Mol Reprod Dev 48:154-8. 1997
    ..The finding that germ cell GCNA1 expression is not restricted to the gonadal environment and is not dependent on the Ftz-F1 gene products suggests that GCNA1 expression may be initiated in the germ cell lineage by autonomous means...
  25. pmc RNA expression microarray analysis in mouse prospermatogonia: identification of candidate epigenetic modifiers
    Christophe Lefevre
    Department of Zoology, The University of Melbourne, Victoria, Australia
    Dev Dyn 237:1082-9. 2008
    ..These data provide a useful resource in the discovery of molecular pathways involved in epigenetic reprogramming in the mammalian germ line...
  26. ncbi Oogenesis in the viviparous matrotrophic lizard Mabuya brachypoda
    Arlette Hernández-Franyutti
    Laboratorio de Biología de la Reproducción Animal, Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, D F Mexico, Mexico
    J Morphol 265:152-64. 2005
    ..9-1.3 mm. Two elongated germinal beds, formed by germinal epithelia containing oogonia, early oocytes, and somatic cells, are found on the dorsal surface of each ovary...
  27. ncbi Phytophthora morindae, a new species causing black flag disease on noni (Morinda citrifolia L) in Hawaii
    Scot C Nelson
    University of Hawaii at Manoa, College of Tropical Agriculture and Human Resources, Department of Plant and Environmental Protection Sciences, Cooperative Extension Service, 875 Komohana Street, Hilo, Hawaii 96720, USA
    Mycologia 102:122-34. 2010
    ..The sexual phase is characterized by the production of oogonia with tapered bases, small amphigynous antheridia and thick-walled, plerotic oospores...
  28. ncbi Stem cell factor and c-Kit in human primordial germ cells and fetal ovaries
    Poul Erik Høyer
    Institute of Medical Anatomy, Panum Institute, University of Copenhagen, Copenhagen, Denmark
    Mol Cell Endocrinol 234:1-10. 2005
    ..Prominent c-Kit and SCF staining was present in germ cells of the embryonic gonadal anlage and in oogonia during further ovarian development. However, oocytes were either unstained or faintly stained for SCF...
  29. ncbi Cell-cycle regulation and mammalian gametogenesis: a lesson from the unexpected
    Abraham L Kierszenbaum
    Department of Cell Biology and Anatomical Sciences, The Sophie Davis School of Biomedical Education, The City University of New York Medical School, New York, New York 10031, USA
    Mol Reprod Dev 73:939-42. 2006
    ..Both spermatogonia and oogonia are stem cell populations committed to meiosis with the aim of generating haploid gametes for fertilization...
  30. ncbi Comparison of reproductive development in triploid and diploid female rainbow trout Oncorhynchus mykiss
    Y Han
    College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
    J Fish Biol 76:1742-50. 2010
    ..mykiss reached sexual maturity 3 years after hatching and its oogenesis underwent four stages, which were oogonia, primary oocyte, secondary oocyte and egg...
  31. ncbi Sex chromosome elimination, X chromosome inactivation and reactivation in the southern brown bandicoot Isoodon obesulus (Marsupialia: Peramelidae)
    P G Johnston
    Department of Biological Sciences, Macquarie University, Sydney, Australia
    Cytogenet Genome Res 99:119-24. 2002
    ..of germ cells from different aged pouch young heterozygotes showed only maternal allele expression in oogonia whereas an additional paternally derived band was observed in pre-dictyate oocytes...
  32. ncbi Oogenesis in teleosts: how eggs are formed
    Esther Lubzens
    Department of Marine Biology, Israel Oceanographic and Limnological Research, 81080 Haifa, Israel
    Gen Comp Endocrinol 165:367-89. 2010
    ..the dynamic processes associated with oogenesis, the formation of an egg, from the time that germ cells turn into oogonia, until the release of ova during spawning in teleosts...
  33. ncbi Phytophthora siskiyouensis, a new species from soil, water, myrtlewood (Umbellularia californica) and tanoak (Lithocarpus densiflorus) in southwestern Oregon
    Paul W Reeser
    Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331, USA
    Mycologia 99:639-43. 2007
    ..The new species, Phytophthora siskiyouensis, is homothallic with globose to subglobose oogonia, which may be terminal, sessile or laterally intercalary...
  34. ncbi Survival and reproduction of some blue-green and green algae as affected by sewage water, fertilizer factory effluent, brassica oil, phenol, toluene and benzene
    S C Agrawal
    Department of Botany, University of Allahabad, India
    Folia Microbiol (Praha) 54:67-73. 2009
    ..not any oogonia-like cells under all or most of treatments with 25-100 % sewage water, 1-100 % fertilizer factory effluent, 1-100 ..
  35. ncbi Immunolocalization of Schistosoma mansoni and Schistosoma haematobium antigens reacting with their Egyptian snail vectors
    Shadia M el-Dafrawy
    Department of Medical Malacology, Theodor Bilharz Research Institute, Imbaba P O Box 30, Giza, Egypt
    J Egypt Soc Parasitol 37:1039-48. 2007
    ..it was detected in epithelial cells lining the tubules, male cells in the lumen of the tubules and in female oogonia cells along the periphery of the tubules...
  36. ncbi Xenogenic oogenesis of chicken (Gallus domesticus) female primordial germ cells in germline chimeric quail (Coturnix japonica) ovary
    C H Liu
    Department of Cell Biology, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
    Anim Reprod Sci 101:344-50. 2007
    ..6+/-237.1 female chicken PGCs-derived oogonia scattered in ovarian cortex area...
  37. ncbi Pythium contiguanum nomen novum (syn. Pythium dreschleri Paul), its antagonism to Botrytis cinerea, ITS1 region of its nuclear ribosomal DNA, and its comparison with related species
    B Paul
    Laboratoire des Sciences de la Vigne, Institut Jules Guyot, Universite de Bourgogne, P O Box 138, 21004, Dijon, France
    FEMS Microbiol Lett 183:105-10. 2000
    ..drechsleri Paul. This species is characterised by its contiguous inflated type of sporangia, smooth-walled oogonia and mostly monoclinous antheridia...
  38. ncbi Gonadoblastoma: evidence for a stepwise progression to dysgerminoma in a dysgenetic ovary
    Katharina Pauls
    Institute of Pathology, University of Bonn, Bonn, Germany
    Virchows Arch 447:603-9. 2005
    ..They contained both cell types, similar to oocytes (M2A-, GCAP-, c-kit+/-, sACE-) and oogonia (M2A+, GCAP+, c-kit+, sACE+)...
  39. ncbi A germline-specific gap junction protein required for survival of differentiating early germ cells
    Salli I Tazuke
    Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305 5329, USA
    Development 129:2529-39. 2002
    ..Adult zpg-null gonads contain small numbers of early germ cells, resembling stem cells or early spermatogonia or oogonia, but lack later stages of germ cell differentiation...
  40. ncbi Developmental expression of POU5F1 (OCT-3/4) in normal and dysgenetic human gonads
    Ewa Rajpert-De Meyts
    Department of Growth and Reproduction, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
    Hum Reprod 19:1338-44. 2004
    ....
  41. ncbi Linker histone transitions during mammalian oogenesis and embryogenesis
    H J Clarke
    Department of Obstetrics and Gynecology, McGill University, Montreal, Canada
    Dev Genet 22:17-30. 1998
    ..Immunologically detectable somatic H1 is present in mitotically proliferating oogonia but gradually becomes undetectable after the oocytes enter meiosis...
  42. ncbi Morphological and biochemical alterations of oomycete fish pathogen Saprolegnia parasitica as affected by salinity, ascorbic acid and their synergistic action
    Esam H Ali
    Faculty of Science, Department of Botany, Assiut University, Assiut, Egypt
    Mycopathologia 159:231-43. 2005
    ..Reduction of numbers and plasmolysis of oogonia were found at various NaCl concentrations, whereas ascorbic acid stimulated the formation of these reproductive ..
  43. ncbi Morphodynamics of ovarian follicles during oogenesis in mice
    Eimei Sato
    Laboratory of Animal Reproduction, Graduate School of Agricultural Science, Tohoku University, Sendai 981 8555, Japan
    Microsc Res Tech 69:427-35. 2006
    In the mouse, oogonia enter the prophase of the first meiotic division and differentiate into oocyte while developing in the fetal ovary...
  44. ncbi Isolation of oogonia from ovaries of the sea urchin Strongylocentrotus nudus
    Konstantin V Yakovlev
    A V Zhirmunsky Institute of Marine Biology, Far Eastern Branch of Russian Academy of Sciences, Palchevsky Street 17, 690041 Vladivostok, Russia
    Cell Tissue Res 342:479-90. 2010
    The presence of oogonia in the ovaries of adult females is typical in species with a broadcast spawning reproductive strategy, including invertebrates and lower vertebrates...
  45. ncbi Differential expression and dynamic changes of SOX3 during gametogenesis and sex reversal in protogynous hermaphroditic fish
    Bo Yao
    State Key Laboratory of Freshwater Ecology and Biotechnology, Wuhan Center for Developmental Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Wuhan, China
    J Exp Zool A Ecol Genet Physiol 307:207-19. 2007
    ..of gametogenesis and sex reversal, and EcSOX3 protein exists in the differentiating primordial germ cells, oogonia, and different stage oocytes of ovaries, and also in the differentiating primordial germ cells and the Sertoli ..
  46. ncbi Phytophthora kernoviae sp. nov., an invasive pathogen causing bleeding stem lesions on forest trees and foliar necrosis of ornamentals in the UK
    Clive M Brasier
    Forest Research Agency, Farnham, Surrey GU10 4LH, UK
    Mycol Res 109:853-9. 2005
    ..ramorum. P. kernoviae is self-fertile (homothallic), having plerotic oogonia, often with distinctly tapered stalks and amphigynous antheridia...
  47. ncbi Centroid, a novel putative DEAD-box RNA helicase maternal mRNA, is localized in the mitochondrial cloud in Xenopus laevis oocytes
    Malgorzata Kloc
    Department of Biochemistry and Molecular Biology, The University of Texas M D Anderson Cancer Center, Houston, Texas 77030, USA
    Int J Dev Biol 51:701-6. 2007
    ..a cDNA library from the ovaries of stage 64 Xenopus tadpoles with the idea that it will be enriched for oogonia and pre-stage I and stage I oocytes and thus, RNAs involved in oocyte development and germ plasm formation and ..
  48. ncbi In or out stemness: comparing growth factor signalling in mouse embryonic stem cells and primordial germ cells
    Massimo De Felici
    Department of Public Health and Cell Biology, University of Rome Tor Vergata, Italy
    Curr Stem Cell Res Ther 4:87-97. 2009
    ..In fact, in normal condition PGCs are believed to differentiate into germ cells only, oogonia/oocytes in the female, and prospermatogonia in the male which ultimately produce eggs and sperm, respectively...
  49. ncbi Possible participation of mitochondria in lipid yolk formation in oocytes of paddlefish and sturgeon
    Monika Zelazowska
    Department of Systematic Zoology, Institute of Zoology, Jagiellonian University, R Ingardena 6, 30 060 Krakow, Poland corrected
    Cell Tissue Res 335:585-91. 2009
    ..The ovarian nests comprise oogonia and numerous early dictyotene oocytes surrounded by somatic prefollicular cells...
  50. ncbi Gonad development during the early life of Octopus maya (Mollusca: Cephalopoda)
    Omar Hernando Avila-Poveda
    Posgrado en Ciencias del Mar y Limnología ICMyL, Universidad Nacional Autonoma de Mexico UNAM, Puerto de abrigo S N, Sisal, Yucatan, Mexico
    Biol Bull 216:94-102. 2009
    ..5 mm DML and 4.8210 g fBW) at the same time since hatching were immature (stage 1), with many oogonia, few oocytes, and germinal epithelium...
  51. ncbi Achlya abortispora, a new oomycete isolated from water samples taken from a water reservoir in Morocco
    El Androusse Amal
    Laboratoire de Botanique, Departement de Biologie, Faculte des Sciences, Universite Mohammed V, Rabat, BP, Maroc
    Curr Microbiol 53:60-7. 2006
    ..long fusiform sporangia with achlyoid and aplanoid discharge of zoospores; smooth-walled spherical to club-shaped oogonia, which are usually lateral, but at times intercalary, containing 1 to 20 oospheres...
  52. ncbi A new species of Pythium with ornamented oogonia: morphology, taxonomy, internal transcribed spacer region of its ribosomal RNA, and its comparison with related species
    Bernard Paul
    Laboratoire des Sciences de la Vigne, Institut Jules Guyot, Universite de Bourgogne, Dijon, France
    FEMS Microbiol Lett 254:317-23. 2006
    ..The oomycete has spiny oogonia and does not sporulate readily...
  53. ncbi Three forms of cyclin B transcripts in the ovary of the kuruma prawn Marsupenaeus japonicus: their molecular characterizations and expression profiles during oogenesis
    Gao Feng Qiu
    Fisheries Agency, National Research Institute of Aquaculture, Nansei, Mie 516 0193, Japan
    Comp Biochem Physiol B Biochem Mol Biol 141:186-95. 2005
    ..In situ hybridization showed that the short transcript commenced expressing in the ova as early as the oogonia stage and accumulated largely at the perinucleolus (PN) stage, whereas almost no expression was found for the ..
  54. ncbi A new mycoparasite, Pythium lycopersicum, isolated in Isparta, Turkey: morphology, molecular characteristics, and its antagonism with phytopathogenic fungi
    Gürsel Karaca
    Plant Protection Department, Faculty of Agriculture, Suleyman Demirel University, Isparta, Turkey
    FEMS Microbiol Lett 288:163-70. 2008
    ..by its contiguous sporangia having globose to elongated elements linked with hyphal filaments, ornamented oogonia, and monoclinous antheridia with large antheridial cells...
  55. ncbi The Dazh gene is expressed in male and female embryonic gonads before germ cell sex differentiation
    J Seligman
    Department of Obstetrics Gynecology, Rambam Medical Center, Haifa, Israel
    Biochem Biophys Res Commun 245:878-82. 1998
    ..In females, oogonia enter meiosis at 13.5-14...
  56. ncbi Identification of a homologue of POU5F1 (OCT3/4) in a marsupial, the brushtail possum
    S Frankenberg
    Department of Zoology, La Trobe University, Victoria, Australia
    Mol Reprod Dev 58:255-61. 2001
    ..The mRNA for tvPOU5F1 was detected by in situ hybridization in oogonia and in oocytes of growing follicles, but not in early meiotic oocytes...
  57. ncbi Germ cells, gonads and sex reversal in marsupials
    M B Renfree
    Department of Zoology, The University of Melbourne, Victoria, Australia
    Int J Dev Biol 45:557-67. 2001
    ..marsupials by hormonal manipulation, and oestradiol can induce male germ cells to enter meiosis at the time the oogonia do...
  58. ncbi Differentiation of murine premigratory primordial germ cells in culture
    A J Richards
    Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, Florida 32610-0266, USA
    Biol Reprod 61:1146-51. 1999
    ..by either alkaline phosphatase or GCNA1, we did not detect long-term survival of either prospermatogonia or oogonia under conditions that support the survival, proliferation, and differentiation of earlier premigratory cells...
  59. ncbi The molecular basis of ovarian cell death during germ cell attrition, follicular atresia, and luteolysis
    J L Tilly
    The Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, Massachusetts General Hospital Harvard Medical School, Boston, MA 02114, USA
    Front Biosci 1:d1-11. 1996
    ..examinations, several recent studies have confirmed the occurrence of apoptosis in female germ cells (oogonia and oocytes) during fetal ovarian development, granulosa cells during follicular atresia, and cells of the corpus ..
  60. ncbi Fine-structure alterations in female Brugia malayi and Litomosoides carinii after in vivo treatment with flubendazole
    M Franz
    Institut für Spezielle Zoology und Parasitologie, Ruhr Universitat, Federal Republic of Germany
    Parasitol Res 76:401-5. 1990
    ..At this time, marked alterations were also observed in the oogonia and in the embryonic cells...
  61. ncbi Expression pattern of meiosis associated SYCP family members during germline development in chickens
    Ying Hui Zheng
    Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151921, South Korea
    Reproduction 138:483-92. 2009
    ..0; the expression continued in proliferating pre-meiotic oogonia until E15.5 and was upregulated in meiotic prophase I oocytes until hatching...
  62. ncbi Pythium segnitium sp. nov., isolated from the Canary Islands--its taxonomy, ITS region of rDNA, and comparison with related species
    Bernard Paul
    Laboratoire des Sciences de la Vigne, Institut Jules Guyot, Universite de Bourgogne, BP 27877, 21078 Dijon, France
    FEMS Microbiol Lett 217:207-12. 2002
    ..It belongs to the group of Pythium that have smooth-walled oogonia, mostly hypogynous antheridia, and plerotic oospores...
  63. ncbi Pythium glomeratum, a new species isolated from agricultural soil taken in north-eastern France, its ITS region and its comparison with related species
    Bernard Paul
    Laboratoire des Sciences de la Vigne, Institut Jules Guyot, Universite de Bourgogne, BP 27877, 21078 Dijon, France
    FEMS Microbiol Lett 225:47-52. 2003
    ..P. glomeratum is characterized by the presence of branched antheridia that wrap around the oogonia, aplerotic to almost plerotic oospores, and the lack of zoosporangia and zoospores...
  64. ncbi Pattern and rate of ovary differentiation with reference to somatic development in anuran amphibians
    Maria Ogielska
    Laboratory of Evolutionary and Developmental Biology of Vertebrates, Zoological Institute, Wroclaw University, 50 335 Wrocław, Poland
    J Morphol 259:41-54. 2004
    ..meiocytes; VI, first diplotene oocytes; VII-IX, increasing number of diplotene oocytes and decreasing number of oogonia and nests; X, fully developed ovary composed of diplotene oocytes with rudimental patches of oogonia...
  65. ncbi Phytophthora polonica, a new species isolated from declining Alnus glutinosa stands in Poland
    Lassaad Belbahri
    Laboratory of Applied Genetics, School of Engineering of Lullier, University of Applied Sciences of Western Switzerland, Jussy, Switzerland
    FEMS Microbiol Lett 261:165-74. 2006
    ..chlamydospores in agar media and in soil extract, persistent, ovoid to ellipsoid nonpapillate sporangia and large oogonia with paragynous and sometimes amphigynous antheridia...
  66. ncbi Involvement of Phytophthora species in the decline of beech Fagus sylvatica in Wallonia (Belgium)
    S Schmitz
    Walloon Agricultural Research Centre, Department Biological Control and Plant Genetic Resources, Rue de Liroux 4, BE 5030 Gembloux, Belgium
    Commun Agric Appl Biol Sci 72:879-85. 2007
    ..Both complementation types (A1 and A2) of P. cambivora were identified, sometimes in the same sampling site. Ornamented oogonia characteristic of this species were produced by pairing A1 and A2 strains isolated from the same site.
  67. ncbi Saprolegnia bulbosa sp. nov. isolated from an Argentine stream: taxonomy and comparison with related species
    Mónica Mirta Steciow
    Instituto de Botánica Spegazzini, La Plata, Buenos Aires, Argentina
    FEMS Microbiol Lett 268:225-30. 2007
    ..The distinctive characteristics of S. bulbosa are the product of smooth oogonia and predominantly contorted monoclinous, androgynous and diclinous antheridia...
  68. pmc Increase of FMRP expression, raised levels of FMR1 mRNA, and clonal selection in proliferating cells with unmethylated fragile X repeat expansions: a clue to the sex bias in the transmission of full mutations?
    U Salat
    Department of Human Genetics, University Hospital, 89070 Ulm, Germany
    J Med Genet 37:842-50. 2000
    ..At the proliferation of oogonia of carrier females, the same mechanism would, in theory, favour transmission of any expanded FMR1 allele on ..
  69. ncbi The structure of the ovary and oogenesis in the earthworm, Dendrobaena veneta (Annelida, Clitellata)
    E Siekierska
    Department of Animal Histology and Embryology, Silesian University, Katowice, ul Bankowa 9, PL 40 007 Katowice, Poland
    Tissue Cell 35:252-9. 2003
    ..The somatic cells and their processes envelop the germ cells tightly and play a supportive role. Oogonia, oocytes and trophocytes are arranged in distinct zones in the ovary...
  70. ncbi Gonadal morphogenesis and sex differentiation in intraovarian embryos of the viviparous fish Zoarces viviparus (Teleostei, Perciformes, Zoarcidae): a histological and ultrastructural study
    Tina H Rasmussen
    Institute of Biology, University of Southern Denmark, DK 5230 Odense, Denmark
    J Morphol 267:1032-47. 2006
    ..Ultrastructually, the features of the primordial germ cells, oogonia, and spermatogonia are similar, including nuage, mitochondria, endoplasmic reticulum, and Golgi complexes.
  71. ncbi Re-evaluation of the enigmatic species complex Saprolegnia diclina-Saprolegnia parasitica based on morphological, physiological and molecular data
    Javier Diéguez-Uribeondo
    Departamento de Micologia, Real Jardín Botánico CSIC, Plaza Murillo 2, 28014 Madrid, Spain
    Fungal Genet Biol 44:585-601. 2007
    ..Presence of bundles of long-hooked hairs on secondary cysts, high frequency of retracted germination, and oogonia production at 7 degrees C (when occurring) were characteristic of this clade. A single isolate identified as S...
  72. ncbi Morphometry of human ovaries in normal and growth-restricted fetuses
    J P de Bruin
    Department of Obstetrics and Gynaecology, Diakonessenhuis Utrecht, Bosboomstraat 1, 3582 KE, Utrecht, The Netherlands
    Early Hum Dev 60:179-92. 2001
    ..ovarian cortex, the maximum diameters of individual follicles and the distribution of the follicle classes and oogonia were determined. The volume of the ovaries increased significantly from 0.10 to 0...
  73. ncbi Germline passage of mitochondria: quantitative considerations and possible embryological sequelae
    R P Jansen
    Sydney IVF and the University of Sydney, Australia
    Hum Reprod 15:112-28. 2000
    ..From approximately 100 or so such cells, a population of > or =7 x 10(6) oogonia and primary oocytes is produced in the fetal ovaries during mid-gestation, with mitochondria numbering up to ..
  74. ncbi Germ line control of female sex determination in zebrafish
    Kellee R Siegfried
    Max Planck Institute for Developmental Biology, Department of Genetics Spemannstrasse 35, 72076 Tubingen, Germany
    Dev Biol 324:277-87. 2008
    ..In mammals, the oogonia of the developing ovary are known to be important for folliculogenesis...
  75. ncbi Achlya spiralis, a new aquatic oomycete with bent oogonial stalks, isolated from the Burgundian region of France
    Bernard Paul
    Laboratoire de Mycologie et de Phytopathologie, Institut Jules Guyot, Universite de Bourgogne, Dijon, France
    FEMS Microbiol Lett 284:120-5. 2008
    ..It is characterized by the presence of smooth-walled oogonia that are usually borne on bent or twisted oogonial stalks; mainly monoclinous, androgynous and diclinous ..
  76. pmc Peronosporomycetes (Oomycota) from a Middle Permian permineralised peat within the Bainmedart Coal Measures, Prince Charles Mountains, Antarctica
    Ben J Slater
    School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
    PLoS ONE 8:e70707. 2013
    ..Specimens are numerous and comprise two morphologically distinct kinds of ornamented oogonia, of which some are attached to hyphae by a septum. Combresomyces caespitosus sp. nov...
  77. pmc Mouse TEX14 is required for embryonic germ cell intercellular bridges but not female fertility
    Michael P Greenbaum
    Department of Pathology, Baylor College of Medicine, Houston, Texas 77030, USA
    Biol Reprod 80:449-57. 2009
    ..Germ cell intercellular bridges are readily identified by KIF23 immunofluorescence between the gonocytes and oogonia of control mice but are absent between germ cells of Tex14-null mice...
  78. ncbi Identification and expression analysis of the Broad-Complex core protein isoform 6 (BR-C Z6) gene in the giant tiger shrimp Penaeus monodon (Penaeidae: Decapoda)
    A Buaklin
    Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
    Genet Mol Res 10:2290-306. 2011
    ..In situ hybridization revealed that PmBR-C Z6 transcripts were localized in oogonia and cytoplasm of previtellogenic and vitellogenic oocytes of both wild intact and eyestalk-abated broodstock...
  79. pmc Expression of EGFL7 in primordial germ cells and in adult ovaries and testes
    Luisa Campagnolo
    Department of Public Health and Cell Biology, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy
    Gene Expr Patterns 8:389-96. 2008
    ..Expression is down-regulated when PGCs differentiate into pro-spermatogonia and oogonia, and by 15.5 dpc Egfl7 can no longer be detected in the germ line of both sexes...
  80. ncbi The effect of a parenteral ivermectin/closantel injection on the growth and reproductive development of early immature Fasciola hepatica in cattle
    R E B Hanna
    Veterinary Sciences Division, DARDNI, Stormont, Belfast BT4 3SD, United Kingdom
    Vet Parasitol 142:78-90. 2006
    ..In the treated flukes, early spermatogonia and oogonia were the predominant cell types in the testes and ovary, whilst undifferentiated stem cells were abundant in the ..
  81. ncbi The continuum of ovarian aging and clinicopathologies associated with the menopausal transition
    Edward J Nejat
    Department of Obstetrics and Gynecology and Women s Health, Albert Einstein College of Medicine, Bronx, NY 10461, USA
    Maturitas 66:187-90. 2010
    ..The maximal size of the ovarian germ cell pool occurs at midgestation and is followed by a continuous decline in oogonia through birth, puberty, the reproductive years, and finally, the menopause...
  82. ncbi Molecular mechanisms underlying sex change in hermaphroditic groupers
    Li Zhou
    State Key Laboratory of Freshwater Ecology and Biotechnology, Wuhan Center for Developmental Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Wuhan 430072, China
    Fish Physiol Biochem 36:181-93. 2010
    ..As SOX3 continues to express, the SOX3-positive primordial germ cells develop toward oogonia and then oocytes, whereas, when SOX3 expression is ceased, the SOX3-positive primordial germ cells develop toward ..
  83. pmc Premature ovarian failure in nobox-deficient mice is caused by defects in somatic cell invasion and germ cell cyst breakdown
    Agnieszka Lechowska
    Institute of Zoology, Jagiellonian University, Krakow, Poland
    J Assist Reprod Genet 28:583-9. 2011
    ..To understand the mechanism of premature ovarian failure (POF)...
  84. ncbi Lymphocyte antigen 75 (Ly75/CD205) is a surface marker on mitotic germ cells in rainbow trout
    Kazue Nagasawa
    Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
    Biol Reprod 83:597-606. 2010
    ..ly75 mRNA was predominantly localized in the primordial germ cells of newly hatched embryos, A-SG in testis, oogonia, and chromatin nucleolus-stage oocytes in the ovary...
  85. ncbi Activity of the ovarian germinal epithelium in the freshwater catfish, Pimelodus maculatus (Teleostei: Ostariophysi: Siluriformes): germline cysts, follicle formation and oocyte development
    Irani Quagio-Grassiotto
    Department of Morphology, Institute of Bioscience, Sao Paulo State University UNESP, Botucatu, Sao Paulo 18618 970, Brazil
    J Morphol 272:1290-306. 2011
    Distinct types of oogonia are found in the germinal epithelium that borders the ovarian lamellae of Pimelodus maculatus: A-undifferentiated, A-differentiated and B-oogonia...
  86. ncbi A new species of Pythium isolated from a vineyard in France
    Bernard Paul
    Laboratoire des Sciences de la Vigne, Institut Jules Guyot, Universite de Bourgogne, Dijon, France
    FEMS Microbiol Lett 263:194-9. 2006
    Pythium apiculatum sp. nov. is a new oomycete characterized by the presence of both ornamented and smooth-walled oogonia. The ornamentations are blunt, and at times, bent...
  87. ncbi Ovarian structure and oogenesis of the oviparous goodeids Crenichthys baileyi (Gilbert, 1893) and Empetrichthys latos Miller, 1948 (teleostei, Cyprinodontiformes)
    Mari Carmen Uribe
    Laboratorio de Biología de la Reproducción Animal, Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico, D F Mexico
    J Morphol 273:371-87. 2012
    ..Goodeinae has an internal septum that divides the ovarian lumen into two compartments, and it may possess oogonia. There is no ovarian septum in the oviparous C. baileyi and E. latos...
  88. ncbi Biology and identity of fish spermatogonial stem cell
    Samyra Maria Dos Santos Nassif Lacerda
    Laboratory of Cellular Biology, Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270 901, Brazil
    Gen Comp Endocrinol 207:56-65. 2014
    ..A technique already used to demonstrate that, different from mammals, fish germ stem cells (spermatogonia and oogonia) present high sexual plasticity that is determined by the somatic microenvironment...
  89. ncbi Primary oocyte transcriptional activation of aqp1ab by the nuclear progestin receptor determines the pelagic egg phenotype of marine teleosts
    Cinta Zapater
    IRTA Institut de Ciències del Mar, Consejo Superior de Investigaciones Cientificas CSIC, 08003 Barcelona, Spain
    Dev Biol 377:345-62. 2013
    ..localization studies indicated that the Pgr, as well as sox3 and -8b transcripts, are co-expressed in seabream oogonia, whereas in meiosis-arrested primary growth (pre-vitellogenic) oocytes, when aqp1ab mRNA and protein are first ..
  90. ncbi The proliferation and migration of immature germ cells in the mussel, Mytilus galloprovincialis: observation of the expression pattern in the M. galloprovincialis vasa-like gene (Myvlg) by in situ hybridization
    Mayu Obata
    Faculty of Bioresources, Mie University, 1577 Kurimamachiya, Tsu, Mie, 514 8507, Japan
    Dev Genes Evol 220:139-49. 2010
    ..Myvlg expression was detected in spermatogonia, spermatocytes, oogonia, and oocytes...
  91. ncbi Germinal epithelium, folliculogenesis, and postovulatory follicles in ovaries of rainbow trout, Oncorhynchus mykiss (Walbaum, 1792) (Teleostei, protacanthopterygii, salmoniformes)
    Harry J Grier
    Division of Fishes, Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia 20013 7012, USA
    J Morphol 268:293-310. 2007
    ..was active in postspawned rainbow trout, as determined by the presence of numerous cell nests, composed of oogonia, mitotic oogonia, early diplotene oocytes, and prefollicle cells...
  92. ncbi Infertility in the hyperplasic ovary of freshwater planarians: the role of programmed cell death
    Abdel Halim Harrath
    Zoology Department College of Science, King Saud University, P O Box 2455, Riyadh, 11451, Saudi Arabia
    Cell Tissue Res 358:607-20. 2014
    ..confirmed that the nuclei of the majority of differentiating oocytes were TUNEL-positive, whereas the nuclei of oogonia and young oocytes were TUNEL-negative; in the normal ovary, oocytes are TUNEL-negative...
  93. ncbi Ontogeny of immunoreactive Lh and Fsh cells in relation to early ovarian differentiation and development in protogynous hermaphroditic ricefield eel Monopterus albus
    Yangsheng Wu
    Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat Sen University, Guangzhou, People s Republic of China
    Biol Reprod 86:93. 2012
    ..Lhb-immunoreactive signals were first detected in the pituitary around 40 days after hatching (dah) when the oogonia transitioned into early primary growth oocytes, and the intensity of immunoreactivity increased concomitantly ..
  94. ncbi Vasa protein is localized in the germ cells and in the oocyte-associated pyriform follicle cells during early oogenesis in the lizard Podarcis sicula
    Maria G Maurizii
    Dipartimento di Biologia Evoluzionistica Sperimentale, Universita di Bologna, Bologna, Italy
    Dev Genes Evol 219:361-7. 2009
    ..Here, we analyze the distribution of Vasa in early germ cells (oogonia and oocytes) and previtellogenic ovarian follicles of the lizard Podarcis sicula...
  95. pmc Maternal age and chromosomally abnormal pregnancies: what we know and what we wish we knew
    Terry Hassold
    School of Molecular Biosciences and Center for Reproductive Biology, Washington State University, Pullman, Washington 99164, USA
    Curr Opin Pediatr 21:703-8. 2009
    ..Thus, as women approach the end of their child-bearing years, errors of chromosome segregation represent the most important impediment to a successful pregnancy...
  96. ncbi Sexual plasticity of ovarian germ cells in rainbow trout
    Goro Yoshizaki
    Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4 5 7 Konan, Minato ku, Tokyo, Japan
    Development 137:1227-30. 2010
    ..Ovarian germ cells containing oogonia and early oocytes isolated from female rainbow trout were transplanted into the peritoneal cavities of hatching-..
  97. ncbi Embryonic pathogenesis of hypogonadism and renal hypoplasia in hgn/hgn rats characterized by male sterility, reduced female fertility and progressive renal insufficiency
    Hiroetsu Suzuki
    Laboratory of Veterinary Physiology, Nippon Veterinary and Life Science University, Tokyo, Japan
    Congenit Anom (Kyoto) 47:34-44. 2007
    ..The hgn/hgn ovaries contained a small number of oogonia at ED 15.5 and oocytes after ED 17.5. Testicular growth defects were obvious after ED 17...
  98. ncbi Two clonal lineages of Phytophthora citrophthora from citrus in South Africa represent a single phylogenetic species
    Christoffel F J Spies
    Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
    Mycologia 106:1106-18. 2014
    ..G2 lineage including CTR1 reference isolates) mating-type isolates were paired in all possible combinations, no oogonia or antheridia were produced. This suggests that only tester strains P...
  99. ncbi Beta-endorphin disrupts seasonal and FSH-induced ovarian recrudescence in the lizard Mabuya carinata
    C B Ganesh
    Department of Zoology, Karnatak Science College, Dharwad 580 001, India
    Gen Comp Endocrinol 133:305-13. 2003
    ..follicles in the ovary and significantly lower weight of the ovary and the oviduct and the mean number of oogonia, oocytes, and primordial follicles compared to those of FSH-treated lizards...
  100. ncbi Development of bovine nuclear transfer embryos made with oogonia
    M C Lavoir
    Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Canada
    Biol Reprod 56:194-9. 1997
    ..To investigate the pluripotency of bovine oogonia, the development in vitro of bovine embryos reconstructed by fusing oogonia with enucleated oocytes was compared ..
  101. ncbi Mitochondrial DNA segregation in the developing embryo
    E A Shoubridge
    Montreal Neurological Institute and Department of Human Genetics, McGill University, Canada
    Hum Reprod 15:229-34. 2000
    ..Segregation is rapid because the precursor cells (primordial germ cells and oogonia) contain a relatively small number of mtDNA templates (the bottleneck) and because the replication of mtDNA is ..

Research Grants9

  1. Developmental Gene-Environment Interactions and Premature Ovarian Failure
    Ulrike Luderer; Fiscal Year: 2013
    ..to PAHs by increasing PAH metabolism-related reactive oxygen species that initiate programmed cell death of oogonia. The specific aims are: (1) To examine the roles of reactive oxygen species and oxidative damage in premature ..
  2. MICROTUBULE/KERATIN INTERACTIONS DURING SPERMATOGENESIS
    ABRAHAM KIERSZENBAUM; Fiscal Year: 2002
    ..Engineering mouse models in which the expression of K9 is null, is important for both reproductive biology and cancer research. ..
  3. Progestogen Inhibition of Ovarian Cancer Cell Metastasis
    William Murdoch; Fiscal Year: 2003
    ....
  4. Cytoplasmic Reactivation of p53 Family Members
    Charles Walker; Fiscal Year: 2004
    ..Overexpression might overwhelm mechanisms that sequester these proteins in the cytoplasm of leukemic clam hemocytes and lead to a resumption of clam p53 and/or p63/73-induced apoptosis. ..
  5. Regulation of spermatogonial stem cells by vitamin A
    Derek McLean; Fiscal Year: 2007
    ..The current proposal is novel because this is the first time that the effect of a factor, such as vitamin A, on SSC differentiation has been evaluated. [unreadable] [unreadable] [unreadable]..
  6. Cytogenetic Analysis of Recombination in the Human Male
    Terry Hassold; Fiscal Year: 2008
    ..abstract_text> ..
  7. Transmission genetics of mammalian mitochondrial DNA
    Eric Shoubridge; Fiscal Year: 2008
    ..abstract_text> ..
  8. A PROGRAM OF RESEARCH IN POPULATION CYTOGENETICS
    Terry J Hassold; Fiscal Year: 2010
    ....