Seasonal changes in semen characteristics, composition of seminal plasma and frequency of acrosome reaction induced by calcium and calcium ionophore A23187 in large white boars
This study attempted to explain the mechanisms regulating boar fertility by examining seasonal changes in semen characteristics, the composition of seminal plasma and responsiveness of sperm acrosomes to Casup(2+) and the Casup(2+) ionophore A23187 (Casup(2+)/A23187). Sperm-rich and sperm-poor fract...
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description | This study attempted to explain the mechanisms regulating boar fertility by examining seasonal changes in semen characteristics, the composition of seminal plasma and responsiveness of sperm acrosomes to Casup(2+) and the Casup(2+) ionophore A23187 (Casup(2+)/A23187). Sperm-rich and sperm-poor fractions were separately collected from 3 mature fertile Large White boars once a month over a one-year period. During the period of study, ambient temperature and relative humidity were recorded for within the stall in which the boars were kept and the semen characteristics, composition of the seminal plasma of sperm-rich fractions, and occurrence of the acrosome reaction in response to Casup(2+) (3 mM)/A23187 (0.3 microM) were examined. The highest mean maximum and minimum ambient temperatures were recorded in August-September, whereas the lowest mean maximum and minimum ambient temperatures were recorded in December and January, respectively. There was a moderate peak in relative humidity from July to October. The lowest percentages of motile spermatozoa and of spermatozoa with intact acrosomes and highest percentage of spermatozoa with abnormal morphology and strongest agglutination were seen in August-September. The total protein and albumin concentrations were lowest in August-September. Testosterone levels increased gradually as day length decreased after the summer solstice (June) and peaked in October-November. The percentage of acrosome reactions in response to Casup(2+)/A23187 was highest with the quickest response in August-September, as shown by the shortest time required for 50% of relative acrosome reactions. The farrowing rates were lowest in these same 2 months. These results suggest that seasonal infertility in Large White boars may be due, at least in part, to a combination of low motility, abnormal morphology including acrosomal abnormality, and early occurrence of the acrosome reaction in response to stimulus, possibly resulting from a decrease in acrosomal stabilizing proteins in the seminal plasma during summer. These changes may be modulated by heat/humidity stress and/or photoperiod-regulated testosterone. |
doi_str_mv | 10.1262/jrd.19026 |
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(Japan). Faculty of Applied Biological Sciences) ; Imaeda, N ; Yamada, H ; Miyazawa, K</creator><creatorcontrib>Murase, T.(Gifu Univ. (Japan). Faculty of Applied Biological Sciences) ; Imaeda, N ; Yamada, H ; Miyazawa, K</creatorcontrib><description>This study attempted to explain the mechanisms regulating boar fertility by examining seasonal changes in semen characteristics, the composition of seminal plasma and responsiveness of sperm acrosomes to Casup(2+) and the Casup(2+) ionophore A23187 (Casup(2+)/A23187). Sperm-rich and sperm-poor fractions were separately collected from 3 mature fertile Large White boars once a month over a one-year period. During the period of study, ambient temperature and relative humidity were recorded for within the stall in which the boars were kept and the semen characteristics, composition of the seminal plasma of sperm-rich fractions, and occurrence of the acrosome reaction in response to Casup(2+) (3 mM)/A23187 (0.3 microM) were examined. The highest mean maximum and minimum ambient temperatures were recorded in August-September, whereas the lowest mean maximum and minimum ambient temperatures were recorded in December and January, respectively. There was a moderate peak in relative humidity from July to October. The lowest percentages of motile spermatozoa and of spermatozoa with intact acrosomes and highest percentage of spermatozoa with abnormal morphology and strongest agglutination were seen in August-September. The total protein and albumin concentrations were lowest in August-September. Testosterone levels increased gradually as day length decreased after the summer solstice (June) and peaked in October-November. The percentage of acrosome reactions in response to Casup(2+)/A23187 was highest with the quickest response in August-September, as shown by the shortest time required for 50% of relative acrosome reactions. The farrowing rates were lowest in these same 2 months. These results suggest that seasonal infertility in Large White boars may be due, at least in part, to a combination of low motility, abnormal morphology including acrosomal abnormality, and early occurrence of the acrosome reaction in response to stimulus, possibly resulting from a decrease in acrosomal stabilizing proteins in the seminal plasma during summer. These changes may be modulated by heat/humidity stress and/or photoperiod-regulated testosterone.</description><identifier>ISSN: 0916-8818</identifier><identifier>EISSN: 1348-4400</identifier><identifier>DOI: 10.1262/jrd.19026</identifier><identifier>PMID: 17519520</identifier><language>eng</language><publisher>Japan: THE SOCIETY FOR REPRODUCTION AND DEVELOPMENT</publisher><subject>ACROSOMA ; Acrosomal stabilizing protein ; ACROSOME ; Acrosome reaction ; Acrosome Reaction - drug effects ; Acrosome Reaction - physiology ; Albumins - metabolism ; Animals ; Boar ; BOARS ; Calcimycin - pharmacology ; CALCIO ; CALCIUM ; Calcium - metabolism ; Calcium - pharmacology ; Chlorides - metabolism ; ESPERMATOZOO ; ESTERILIDAD MASCULINA ; Fertility - physiology ; INFERTILITE MALE ; Infertility, Male - physiopathology ; IONOFOROS ; IONOPHORE ; IONOPHORES ; Ionophores - pharmacology ; Male ; MALE INFERTILITY ; Seasonal infertility ; SEASONAL VARIATION ; Seasons ; SEMEN ; Semen - metabolism ; Sodium - metabolism ; SPERMATOZOA ; SPERMATOZOIDE ; SPERME ; Sus scrofa - physiology ; Temperature ; VARIACION ESTACIONAL ; VARIATION SAISONNIERE ; VERRACO ; VERRAT</subject><ispartof>Journal of Reproduction and Development, 2007, Vol.53(4), pp.853-865</ispartof><rights>2007 Society for Reproduction and Development</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c575t-eba9d252ed27aae4d2ec598114a8dc6248c090aa3d4a55cb64667a44aa87af923</citedby><cites>FETCH-LOGICAL-c575t-eba9d252ed27aae4d2ec598114a8dc6248c090aa3d4a55cb64667a44aa87af923</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,860,1876,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17519520$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Murase, T.(Gifu Univ. (Japan). Faculty of Applied Biological Sciences)</creatorcontrib><creatorcontrib>Imaeda, N</creatorcontrib><creatorcontrib>Yamada, H</creatorcontrib><creatorcontrib>Miyazawa, K</creatorcontrib><title>Seasonal changes in semen characteristics, composition of seminal plasma and frequency of acrosome reaction induced by calcium and calcium ionophore A23187 in large white boars</title><title>Journal of Reproduction and Development</title><addtitle>J. Reprod. Dev.</addtitle><description>This study attempted to explain the mechanisms regulating boar fertility by examining seasonal changes in semen characteristics, the composition of seminal plasma and responsiveness of sperm acrosomes to Casup(2+) and the Casup(2+) ionophore A23187 (Casup(2+)/A23187). Sperm-rich and sperm-poor fractions were separately collected from 3 mature fertile Large White boars once a month over a one-year period. During the period of study, ambient temperature and relative humidity were recorded for within the stall in which the boars were kept and the semen characteristics, composition of the seminal plasma of sperm-rich fractions, and occurrence of the acrosome reaction in response to Casup(2+) (3 mM)/A23187 (0.3 microM) were examined. The highest mean maximum and minimum ambient temperatures were recorded in August-September, whereas the lowest mean maximum and minimum ambient temperatures were recorded in December and January, respectively. There was a moderate peak in relative humidity from July to October. The lowest percentages of motile spermatozoa and of spermatozoa with intact acrosomes and highest percentage of spermatozoa with abnormal morphology and strongest agglutination were seen in August-September. The total protein and albumin concentrations were lowest in August-September. Testosterone levels increased gradually as day length decreased after the summer solstice (June) and peaked in October-November. The percentage of acrosome reactions in response to Casup(2+)/A23187 was highest with the quickest response in August-September, as shown by the shortest time required for 50% of relative acrosome reactions. The farrowing rates were lowest in these same 2 months. These results suggest that seasonal infertility in Large White boars may be due, at least in part, to a combination of low motility, abnormal morphology including acrosomal abnormality, and early occurrence of the acrosome reaction in response to stimulus, possibly resulting from a decrease in acrosomal stabilizing proteins in the seminal plasma during summer. These changes may be modulated by heat/humidity stress and/or photoperiod-regulated testosterone.</description><subject>ACROSOMA</subject><subject>Acrosomal stabilizing protein</subject><subject>ACROSOME</subject><subject>Acrosome reaction</subject><subject>Acrosome Reaction - drug effects</subject><subject>Acrosome Reaction - physiology</subject><subject>Albumins - metabolism</subject><subject>Animals</subject><subject>Boar</subject><subject>BOARS</subject><subject>Calcimycin - pharmacology</subject><subject>CALCIO</subject><subject>CALCIUM</subject><subject>Calcium - metabolism</subject><subject>Calcium - pharmacology</subject><subject>Chlorides - metabolism</subject><subject>ESPERMATOZOO</subject><subject>ESTERILIDAD MASCULINA</subject><subject>Fertility - physiology</subject><subject>INFERTILITE MALE</subject><subject>Infertility, Male - physiopathology</subject><subject>IONOFOROS</subject><subject>IONOPHORE</subject><subject>IONOPHORES</subject><subject>Ionophores - pharmacology</subject><subject>Male</subject><subject>MALE INFERTILITY</subject><subject>Seasonal infertility</subject><subject>SEASONAL VARIATION</subject><subject>Seasons</subject><subject>SEMEN</subject><subject>Semen - metabolism</subject><subject>Sodium - metabolism</subject><subject>SPERMATOZOA</subject><subject>SPERMATOZOIDE</subject><subject>SPERME</subject><subject>Sus scrofa - physiology</subject><subject>Temperature</subject><subject>VARIACION ESTACIONAL</subject><subject>VARIATION SAISONNIERE</subject><subject>VERRACO</subject><subject>VERRAT</subject><issn>0916-8818</issn><issn>1348-4400</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkd-K1DAUxoMo7rh64QMouRIEuyZp0qZXy7L4lwUF9TqcJqczGdpmTFpk3spHNJ3O6qU3JyHndz5Ovo-Q55xdcVGJt_vornjDRPWAbHgpdSElYw_JhjW8KrTm-oI8SWnPWClUJR-TC14r3ijBNuT3N4QURuip3cG4xUT9SBMOOC4PEeyE0afJ2_SG2jAcQvKTDyMN3UL5ZfDQQxqAwuhoF_HnjKM9Ln2wMaQwII2YZZYhP7rZoqPtkVrorZ-H09T9PSPhsAsR6Y0oua6XVXqIW6S_dn5C2gaI6Sl51EGf8Nn5vCQ_3r_7fvuxuPvy4dPtzV1hVa2mAltonFACnagBUDqBVjWacwna2UpIbVnDAEonQSnbVrKqapASQNfQNaK8JK9W3UMM-U9pMoNPFvseRgxzMpUWKjvb_BcUTGXXRZ3B1yu4-JIiduYQ_QDxaDgzS44m52hOOWb25Vl0bgd0_8hzcBm4XoF9mmCLfwGIOaseT1KqNHItOtf7zhKrwTErvFgVOggGtjll8_mrYEyzvEAtyz93kLuZ</recordid><startdate>20070801</startdate><enddate>20070801</enddate><creator>Murase, T.(Gifu Univ. 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Faculty of Applied Biological Sciences) ; Imaeda, N ; Yamada, H ; Miyazawa, K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c575t-eba9d252ed27aae4d2ec598114a8dc6248c090aa3d4a55cb64667a44aa87af923</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>ACROSOMA</topic><topic>Acrosomal stabilizing protein</topic><topic>ACROSOME</topic><topic>Acrosome reaction</topic><topic>Acrosome Reaction - drug effects</topic><topic>Acrosome Reaction - physiology</topic><topic>Albumins - metabolism</topic><topic>Animals</topic><topic>Boar</topic><topic>BOARS</topic><topic>Calcimycin - pharmacology</topic><topic>CALCIO</topic><topic>CALCIUM</topic><topic>Calcium - metabolism</topic><topic>Calcium - pharmacology</topic><topic>Chlorides - metabolism</topic><topic>ESPERMATOZOO</topic><topic>ESTERILIDAD MASCULINA</topic><topic>Fertility - physiology</topic><topic>INFERTILITE MALE</topic><topic>Infertility, Male - physiopathology</topic><topic>IONOFOROS</topic><topic>IONOPHORE</topic><topic>IONOPHORES</topic><topic>Ionophores - pharmacology</topic><topic>Male</topic><topic>MALE INFERTILITY</topic><topic>Seasonal infertility</topic><topic>SEASONAL VARIATION</topic><topic>Seasons</topic><topic>SEMEN</topic><topic>Semen - metabolism</topic><topic>Sodium - metabolism</topic><topic>SPERMATOZOA</topic><topic>SPERMATOZOIDE</topic><topic>SPERME</topic><topic>Sus scrofa - physiology</topic><topic>Temperature</topic><topic>VARIACION ESTACIONAL</topic><topic>VARIATION SAISONNIERE</topic><topic>VERRACO</topic><topic>VERRAT</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Murase, T.(Gifu Univ. (Japan). Faculty of Applied Biological Sciences)</creatorcontrib><creatorcontrib>Imaeda, N</creatorcontrib><creatorcontrib>Yamada, H</creatorcontrib><creatorcontrib>Miyazawa, K</creatorcontrib><collection>AGRIS</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of Reproduction and Development</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Murase, T.(Gifu Univ. (Japan). Faculty of Applied Biological Sciences)</au><au>Imaeda, N</au><au>Yamada, H</au><au>Miyazawa, K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Seasonal changes in semen characteristics, composition of seminal plasma and frequency of acrosome reaction induced by calcium and calcium ionophore A23187 in large white boars</atitle><jtitle>Journal of Reproduction and Development</jtitle><addtitle>J. Reprod. Dev.</addtitle><date>2007-08-01</date><risdate>2007</risdate><volume>53</volume><issue>4</issue><spage>853</spage><epage>865</epage><pages>853-865</pages><issn>0916-8818</issn><eissn>1348-4400</eissn><abstract>This study attempted to explain the mechanisms regulating boar fertility by examining seasonal changes in semen characteristics, the composition of seminal plasma and responsiveness of sperm acrosomes to Casup(2+) and the Casup(2+) ionophore A23187 (Casup(2+)/A23187). Sperm-rich and sperm-poor fractions were separately collected from 3 mature fertile Large White boars once a month over a one-year period. During the period of study, ambient temperature and relative humidity were recorded for within the stall in which the boars were kept and the semen characteristics, composition of the seminal plasma of sperm-rich fractions, and occurrence of the acrosome reaction in response to Casup(2+) (3 mM)/A23187 (0.3 microM) were examined. The highest mean maximum and minimum ambient temperatures were recorded in August-September, whereas the lowest mean maximum and minimum ambient temperatures were recorded in December and January, respectively. There was a moderate peak in relative humidity from July to October. The lowest percentages of motile spermatozoa and of spermatozoa with intact acrosomes and highest percentage of spermatozoa with abnormal morphology and strongest agglutination were seen in August-September. The total protein and albumin concentrations were lowest in August-September. Testosterone levels increased gradually as day length decreased after the summer solstice (June) and peaked in October-November. The percentage of acrosome reactions in response to Casup(2+)/A23187 was highest with the quickest response in August-September, as shown by the shortest time required for 50% of relative acrosome reactions. The farrowing rates were lowest in these same 2 months. These results suggest that seasonal infertility in Large White boars may be due, at least in part, to a combination of low motility, abnormal morphology including acrosomal abnormality, and early occurrence of the acrosome reaction in response to stimulus, possibly resulting from a decrease in acrosomal stabilizing proteins in the seminal plasma during summer. These changes may be modulated by heat/humidity stress and/or photoperiod-regulated testosterone.</abstract><cop>Japan</cop><pub>THE SOCIETY FOR REPRODUCTION AND DEVELOPMENT</pub><pmid>17519520</pmid><doi>10.1262/jrd.19026</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record> |
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subjects | ACROSOMA Acrosomal stabilizing protein ACROSOME Acrosome reaction Acrosome Reaction - drug effects Acrosome Reaction - physiology Albumins - metabolism Animals Boar BOARS Calcimycin - pharmacology CALCIO CALCIUM Calcium - metabolism Calcium - pharmacology Chlorides - metabolism ESPERMATOZOO ESTERILIDAD MASCULINA Fertility - physiology INFERTILITE MALE Infertility, Male - physiopathology IONOFOROS IONOPHORE IONOPHORES Ionophores - pharmacology Male MALE INFERTILITY Seasonal infertility SEASONAL VARIATION Seasons SEMEN Semen - metabolism Sodium - metabolism SPERMATOZOA SPERMATOZOIDE SPERME Sus scrofa - physiology Temperature VARIACION ESTACIONAL VARIATION SAISONNIERE VERRACO VERRAT |
title | Seasonal changes in semen characteristics, composition of seminal plasma and frequency of acrosome reaction induced by calcium and calcium ionophore A23187 in large white boars |
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