| Seasonal changes in spermatogenesis in the blue fox (Alopex lagopus), quantified by DNA flow cytometry and measurement of soluble Mn2+ -dependent adenylate cyclase activity. | |
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MedLine Citation:
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PMID: 6512769 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The testes of the blue fox (Alopex lagopus) showed marked seasonal variations in size. Testicular weight and volume increased rapidly during January and February to reach maximal values by the beginning of the breeding season (approximately 15 March). During May and June the weights and volumes of the testes declined gradually to the quiescent state which lasted from July until October. Quantitation by DNA flow cytometry of the seasonal changes in the relative numbers of haploid (1C), diploid (2C) and tetraploid (4C) cell numbers in the testis showed that the increase in testis size from December to February was associated with a rapid expansion of the haploid cell compartment as spermatogenesis resumed. In addition, an increase in number of more mature cell types within the haploid cell population was observed over a 2-month period before the breeding season. The decline in testicular size from the middle of April until October was associated with a reduction in both the absolute and relative sizes of the haploid and tetraploid cell populations and a concomitant increase in the relative numbers of diploid cells. Measurements of the activity of the soluble Mn2+ -dependent adenylate cyclase revealed seasonal variations that closely paralleled those of the haploid cell population, indicating that, as in other species, the enzyme may be associated with maturing germ cells. |
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Authors:
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A J Smith; O P Clausen; B Kirkhus; T Jahnsen; O M Møller; V Hansson |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of reproduction and fertility Volume: 72 ISSN: 0022-4251 ISO Abbreviation: J. Reprod. Fertil. Publication Date: 1984 Nov |
Date Detail:
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Created Date: 1985-02-04 Completed Date: 1985-02-04 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0376367 Medline TA: J Reprod Fertil Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 453-61 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adenylate Cyclase
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metabolism Animals Cell Separation Flow Cytometry Foxes / physiology* Male Manganese / metabolism Organ Size Ploidies Seasons* Spermatogenesis* Testis / anatomy & histology, cytology, enzymology |
| Chemical | |
Reg. No./Substance:
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7439-96-5/Manganese; EC 4.6.1.1/Adenylate Cyclase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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