Seasonal reproduction in the mongoose, Herpestes auropunctatus: III. Regulation of gonadotropin secretion in the male
The seasonal regulation of gonadotropin secretion in the male mongoose was investigated by evaluating in vitro responsiveness of anterior pituitaries to gonadotropin releasing hormone (GnRH) and by evaluating postcastration gonadotropin responses in vitro and in vivo during the breeding and inactive...
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| Veröffentlicht in: | General and comparative endocrinology 1982-06, Vol.47 (2), p.235-242 |
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| container_title | General and comparative endocrinology |
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| creator | Soares, M.J. Hoffmann, J.C. |
| description | The seasonal regulation of gonadotropin secretion in the male mongoose was investigated by evaluating
in vitro responsiveness of anterior pituitaries to gonadotropin releasing hormone (GnRH) and by evaluating postcastration gonadotropin responses
in vitro and
in vivo during the breeding and inactive seasons. The relative increase of luteinizing hormone (LH) from
in vitro GnRH-stimulated anterior pituitaries was significantly greater during the active season than during the inactive season. The reduced responsiveness during the inactive season was related to an increase in the negative feedback actions of the testes at the hypophyseal level.
In vitro follicle stimulating hormone (FSH) secretion from GnRH-treated anterior pituitaries was not significantly affected by season; however, a more potent negative feedback effect of the testes on basal FSH release was apparent during the inactive season. The postcastration serum LH response was more rapid during the active season than during the inactive season, whereas the postcastration serum FSH response was not affected by season. |
| doi_str_mv | 10.1016/0016-6480(82)90226-X |
| format | Article |
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in vitro responsiveness of anterior pituitaries to gonadotropin releasing hormone (GnRH) and by evaluating postcastration gonadotropin responses
in vitro and
in vivo during the breeding and inactive seasons. The relative increase of luteinizing hormone (LH) from
in vitro GnRH-stimulated anterior pituitaries was significantly greater during the active season than during the inactive season. The reduced responsiveness during the inactive season was related to an increase in the negative feedback actions of the testes at the hypophyseal level.
In vitro follicle stimulating hormone (FSH) secretion from GnRH-treated anterior pituitaries was not significantly affected by season; however, a more potent negative feedback effect of the testes on basal FSH release was apparent during the inactive season. The postcastration serum LH response was more rapid during the active season than during the inactive season, whereas the postcastration serum FSH response was not affected by season.</description><identifier>ISSN: 0016-6480</identifier><identifier>EISSN: 1095-6840</identifier><identifier>DOI: 10.1016/0016-6480(82)90226-X</identifier><identifier>PMID: 6807748</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Animals ; Carnivora - physiology ; Castration ; Follicle Stimulating Hormone - blood ; Herpestidae - physiology ; Luteinizing Hormone - blood ; Male ; Pituitary Gland, Anterior - metabolism ; Pituitary Hormone-Releasing Hormones ; Reproduction ; Seasons</subject><ispartof>General and comparative endocrinology, 1982-06, Vol.47 (2), p.235-242</ispartof><rights>1982</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/001664808290226X$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/6807748$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Soares, M.J.</creatorcontrib><creatorcontrib>Hoffmann, J.C.</creatorcontrib><title>Seasonal reproduction in the mongoose, Herpestes auropunctatus: III. Regulation of gonadotropin secretion in the male</title><title>General and comparative endocrinology</title><addtitle>Gen Comp Endocrinol</addtitle><description>The seasonal regulation of gonadotropin secretion in the male mongoose was investigated by evaluating
in vitro responsiveness of anterior pituitaries to gonadotropin releasing hormone (GnRH) and by evaluating postcastration gonadotropin responses
in vitro and
in vivo during the breeding and inactive seasons. The relative increase of luteinizing hormone (LH) from
in vitro GnRH-stimulated anterior pituitaries was significantly greater during the active season than during the inactive season. The reduced responsiveness during the inactive season was related to an increase in the negative feedback actions of the testes at the hypophyseal level.
In vitro follicle stimulating hormone (FSH) secretion from GnRH-treated anterior pituitaries was not significantly affected by season; however, a more potent negative feedback effect of the testes on basal FSH release was apparent during the inactive season. The postcastration serum LH response was more rapid during the active season than during the inactive season, whereas the postcastration serum FSH response was not affected by season.</description><subject>Animals</subject><subject>Carnivora - physiology</subject><subject>Castration</subject><subject>Follicle Stimulating Hormone - blood</subject><subject>Herpestidae - physiology</subject><subject>Luteinizing Hormone - blood</subject><subject>Male</subject><subject>Pituitary Gland, Anterior - metabolism</subject><subject>Pituitary Hormone-Releasing Hormones</subject><subject>Reproduction</subject><subject>Seasons</subject><issn>0016-6480</issn><issn>1095-6840</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1982</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpVkdtKxDAQhoMo63p4A4VciYJdk7RNs14Isqi7sCB4gL0LaTJdK22zJo3g25s9IHgzMzD_fMz8g9AZJSNKKL8hMSQ8E-RSsKsxYYwniz00pGScJ1xkZB8N_ySH6Mj7T0JInnI6QAMuSFFkYojCKyhvO9VgBytnTdB9bTtcd7j_ANzabmmth2s8BbcC34PHKji7Cp3uVR_8LZ7NZiP8AsvQqM2krfAy8oztoyxiPGgH_5iqgRN0UKnGw-kuH6P3x4e3yTSZPz_NJvfzBGjB-ySvsjETGRWsNFVJeJaaSutY04oVGc2rMme0BGpAFCYnzLBcqVJzDhURRTFOj9HFlhtP-wpxf9nWXkPTqA5s8DJCiKCcReH5ThjKFoxcubpV7kfufIr9u20f4rbfNTjpdQ2dBlM70L00tpaUyPVf5Np0uTZdCiY3f5GL9BdrG4ER</recordid><startdate>198206</startdate><enddate>198206</enddate><creator>Soares, M.J.</creator><creator>Hoffmann, J.C.</creator><general>Elsevier Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope></search><sort><creationdate>198206</creationdate><title>Seasonal reproduction in the mongoose, Herpestes auropunctatus: III. Regulation of gonadotropin secretion in the male</title><author>Soares, M.J. ; Hoffmann, J.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-e176t-5f49284182bdfb0643dfccbdf1f27415fb521be1de87d502d25aabc66ef087793</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1982</creationdate><topic>Animals</topic><topic>Carnivora - physiology</topic><topic>Castration</topic><topic>Follicle Stimulating Hormone - blood</topic><topic>Herpestidae - physiology</topic><topic>Luteinizing Hormone - blood</topic><topic>Male</topic><topic>Pituitary Gland, Anterior - metabolism</topic><topic>Pituitary Hormone-Releasing Hormones</topic><topic>Reproduction</topic><topic>Seasons</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Soares, M.J.</creatorcontrib><creatorcontrib>Hoffmann, J.C.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>General and comparative endocrinology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Soares, M.J.</au><au>Hoffmann, J.C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Seasonal reproduction in the mongoose, Herpestes auropunctatus: III. Regulation of gonadotropin secretion in the male</atitle><jtitle>General and comparative endocrinology</jtitle><addtitle>Gen Comp Endocrinol</addtitle><date>1982-06</date><risdate>1982</risdate><volume>47</volume><issue>2</issue><spage>235</spage><epage>242</epage><pages>235-242</pages><issn>0016-6480</issn><eissn>1095-6840</eissn><abstract>The seasonal regulation of gonadotropin secretion in the male mongoose was investigated by evaluating
in vitro responsiveness of anterior pituitaries to gonadotropin releasing hormone (GnRH) and by evaluating postcastration gonadotropin responses
in vitro and
in vivo during the breeding and inactive seasons. The relative increase of luteinizing hormone (LH) from
in vitro GnRH-stimulated anterior pituitaries was significantly greater during the active season than during the inactive season. The reduced responsiveness during the inactive season was related to an increase in the negative feedback actions of the testes at the hypophyseal level.
In vitro follicle stimulating hormone (FSH) secretion from GnRH-treated anterior pituitaries was not significantly affected by season; however, a more potent negative feedback effect of the testes on basal FSH release was apparent during the inactive season. The postcastration serum LH response was more rapid during the active season than during the inactive season, whereas the postcastration serum FSH response was not affected by season.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>6807748</pmid><doi>10.1016/0016-6480(82)90226-X</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | General and comparative endocrinology, 1982-06, Vol.47 (2), p.235-242 |
| issn | 0016-6480 1095-6840 |
| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Animals Carnivora - physiology Castration Follicle Stimulating Hormone - blood Herpestidae - physiology Luteinizing Hormone - blood Male Pituitary Gland, Anterior - metabolism Pituitary Hormone-Releasing Hormones Reproduction Seasons |
| title | Seasonal reproduction in the mongoose, Herpestes auropunctatus: III. Regulation of gonadotropin secretion in the male |
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