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  • 1
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    Meiotic arrest in the mouse follicle maintained by a Gs protein in the oocyte (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-08-24
    Description: The mammalian ovarian follicle consists of a multilayered complex of somatic cells that surround the oocyte. A signal from the follicle cells keeps the oocyte cell cycle arrested at prophase of meiosis I until luteinizing hormone from the pituitary acts on the follicle cells to release the arrest, causing meiosis to continue. Here we show that meiotic arrest can be released in mice by microinjecting the oocyte within the follicle with an antibody that inhibits the stimulatory heterotrimeric GTP-binding protein Gs. This indicates that Gs activity in the oocyte is required to maintain meiotic arrest within the ovarian follicle and suggests that the follicle may keep the cell cycle arrested by activating Gs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mehlmann, Lisa M -- Jones, Teresa L Z -- Jaffe, Laurinda A -- New York, N.Y. -- Science. 2002 Aug 23;297(5585):1343-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Connecticut Health Center, Farmington, CT 06032, USA. lmehlman@neuron.uchc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12193786" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/immunology ; Cells, Cultured ; Cyclic AMP/metabolism ; Female ; GTP-Binding Protein alpha Subunits, Gi-Go/immunology/physiology ; GTP-Binding Protein alpha Subunits, Gs/antagonists & ; inhibitors/immunology/*physiology ; Hypoxanthine/pharmacology ; *Meiosis ; Mice ; Oocytes/drug effects/metabolism/*physiology ; Ovarian Follicle/*physiology ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Cell biology. Smurfing at the leading edge (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-12-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jaffe, Aron B -- Hall, Alan -- New York, N.Y. -- Science. 2003 Dec 5;302(5651):1690-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory for Molecular Cell Biology and Cell Biology Unit, University College London, London WC1E 6BT, UK. a.jaffe@ucl.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14657480" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/*metabolism ; *Cell Movement ; *Cell Polarity ; GTPase-Activating Proteins/metabolism ; Guanine Nucleotide Exchange Factors/metabolism ; Guanosine Triphosphate/metabolism ; Humans ; Mice ; Protein Kinase C/metabolism ; Pseudopodia/metabolism ; Signal Transduction ; Ubiquitin/metabolism ; Ubiquitin-Protein Ligases/*metabolism ; cdc42 GTP-Binding Protein/metabolism ; rac GTP-Binding Proteins/metabolism ; rho GTP-Binding Proteins/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    The Gs-linked receptor GPR3 maintains meiotic arrest in mammalian oocytes (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-14
    Description: Mammalian oocytes are held in prophase arrest by an unknown signal from the surrounding somatic cells. Here we show that the orphan Gs-linked receptor GPR3, which is localized in the oocyte, maintains this arrest. Oocytes from Gpr3 knockout mice resume meiosis within antral follicles, independently of an increase in luteinizing hormone, and this phenotype can be reversed by injection of Gpr3 RNA into the oocytes. Thus, the GPR3 receptor is a link in communication between the somatic cells and oocyte of the ovarian follicle and is crucial for the regulation of meiosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mehlmann, Lisa M -- Saeki, Yoshinaga -- Tanaka, Shigeru -- Brennan, Thomas J -- Evsikov, Alexei V -- Pendola, Frank L -- Knowles, Barbara B -- Eppig, John J -- Jaffe, Laurinda A -- New York, N.Y. -- Science. 2004 Dec 10;306(5703):1947-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, University of Connecticut Health Center (UCHC), Farmington, CT 06032, USA. lmehlmann@neuron.uchc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15591206" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Animals ; Chondroitin Sulfate Proteoglycans/genetics/metabolism ; Expressed Sequence Tags ; Female ; Granulosa Cells/physiology ; Heterotrimeric GTP-Binding Proteins/*metabolism ; In Situ Hybridization ; Lectins, C-Type ; Ligands ; Luteinizing Hormone/metabolism ; *Meiosis ; Metaphase ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mitosis ; Oocytes/*physiology ; Ovarian Follicle/*physiology ; RNA/genetics/metabolism ; Receptors, G-Protein-Coupled/genetics/*physiology ; Versicans
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Biologically active chorionic gonadotropin: synthesis by the human fetus (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-15
    Description: The kidney, and to a slight extent the liver, of human fetuses were found to synthesize and secrete the alpha subunit common to glycoprotein hormones. Fetal lung and muscle did not synthesize this protein. Since fetal kidney and liver were previously found to synthesize beta chorionic gonadotropin, their ability to synthesize bioactive chorionic gonadotropin was also determined. The newly synthesized hormone bound to mouse Leydig cells and elicited a biological response: namely, the synthesis of testosterone. These results suggest that the human fetus may participate in metabolic homeostasis during its development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGregor, W G -- Kuhn, R W -- Jaffe, R B -- HD08478/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):306-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6682243" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chorionic Gonadotropin/*biosynthesis ; Fetus/*metabolism ; Humans ; Kidney/embryology ; Leydig Cells/metabolism ; Liver/embryology ; Luteinizing Hormone/biosynthesis ; Male ; Mice ; Placenta/metabolism ; Testosterone/biosynthesis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Is thymosin action mediated by prostaglandin release? (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-10
    Description: Treatment of spleen cells derived from adult thymectomized mice with thymosin fraction 5 resulted in a rapid and dose-dependent stimulation of the release of immunoreactive prostaglandin E2. The release of prostaglandin E2 was associated with induction of theta antigen and was totally inhibited by indomethacin. In contrast, prostaglandin E2 release from spleen cells from intact donors was inhibited by treatment with fraction 5. The data support the concept that prostaglandin E2 mediates the effects of thymosin fraction 5 on lymphocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rinaldi Garaci, C -- Favalli, C -- Del Gobbo, V -- Garaci, E -- Jaffe, B M -- New York, N.Y. -- Science. 1983 Jun 10;220(4602):1163-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6574601" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dinoprostone ; Dose-Response Relationship, Drug ; Indomethacin/pharmacology ; Lymphocytes/drug effects/physiology ; Male ; Mice ; Mice, Inbred C57BL ; Prostaglandins E/*physiology ; Spleen/drug effects/physiology ; Thymectomy ; Thymosin/*pharmacology ; Thymus Hormones/*pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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