Effects of dietary energy level on luteinizing hormone and adrenal function in the post partum beef cow
The effects of dietary energy and suckling on adrenal function and luteinizing hormone (LH) concentrations were investigated in primiparous postpartum cows. Ten heifers were assigned at calving to either high (22.8 Mcal/day) or low (15.2 Mcal/day) energy diets. Blood samples were collected every 15...
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| Veröffentlicht in: | Theriogenology 1991-07, Vol.36 (1), p.107-116 |
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| creator | Hall, J.B. Kiser, T.E. Boggs, D.L. Lowery, R.S. |
| description | The effects of dietary energy and suckling on adrenal function and luteinizing hormone (LH) concentrations were investigated in primiparous postpartum cows. Ten heifers were assigned at calving to either high (22.8 Mcal/day) or low (15.2 Mcal/day) energy diets. Blood samples were collected every 15 minutes for 8 hours on 28, 42, and 56 days post partum. Calves were allowed to suckle ad libitum during sampling periods. Serum samples were analyzed by radioimmunoassay for LH and cortisol. Concentrations of catecholamines were quantified by reverse-phase HPLC. Body weights were decreased (P |
| doi_str_mv | 10.1016/0093-691X(91)90439-K |
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Ten heifers were assigned at calving to either high (22.8 Mcal/day) or low (15.2 Mcal/day) energy diets. Blood samples were collected every 15 minutes for 8 hours on 28, 42, and 56 days post partum. Calves were allowed to suckle ad libitum during sampling periods. Serum samples were analyzed by radioimmunoassay for LH and cortisol. Concentrations of catecholamines were quantified by reverse-phase HPLC. Body weights were decreased (P<0.01) by low energy intake. In addition, low energy diet cows had lower mean LH concentrations (0.97 ± 0.09 vs 1.57 ± 0.07 ng/ml), P<0.05) than high energy diet cows. Luteinizing hormone concentrations in high energy diet cows increased with days post partum, resulting in a treatment-by-time interaction (P<0.005). Treatment did not affect mean cortisol concentrations. However, within 15 minutes of suckling cortisol release was significantly above baseline in 77% of the observed suckling events. Dihydroxyphenylalanine (DOPA) increased in high energy diet cows compared with that of low energy diet cows (2,833 ± 243 vs 1,294 ± 243 pg/ml, P<0.01). Norepinephrine (NE) and 3,4-dihydroxyphenylacetic acid (DOPAC) were not influenced by treatment. Plasma NE decreased during the postpartum interval (P<0.005). These data suggest that reduced energy intake may prevent the increase in LH associated with increasing days post partum and alter adrenal function. In addition, spontaneous suckling events elicit a release of cortisol.</description><identifier>ISSN: 0093-691X</identifier><identifier>EISSN: 1879-3231</identifier><identifier>DOI: 10.1016/0093-691X(91)90439-K</identifier><identifier>PMID: 16726983</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>ALLAITEMENT ; beef cows ; BOVIN DE BOUCHERIE ; CATECHOLAMINE ; catecholamines ; CATECOLAMINAS ; cortisol ; DIETA ; DOPA ; DURACION ; DUREE ; energy ; ESTEROIDES ; GANADO DE CARNE ; GENISSE ; LACTANCIA ; NORADRENALINE ; NOREPINEFRINA ; NOVILLA ; PESO ; PLASMA SANGUIN ; PLASMA SANGUINEO ; POIDS ; postpartum ; PUERPERIO ; PUERPERIUM ; REGIME ALIMENTAIRE ; STEROIDE ; VACA ; VACHE ; VALEUR ENERGETIQUE ; VALOR ENERGETICO</subject><ispartof>Theriogenology, 1991-07, Vol.36 (1), p.107-116</ispartof><rights>1991</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c378t-511c8e53e08dffc263307e50e5740f2b583f8262d491a76a33677546ae0858d93</citedby><cites>FETCH-LOGICAL-c378t-511c8e53e08dffc263307e50e5740f2b583f8262d491a76a33677546ae0858d93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/0093691X9190439K$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16726983$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Hall, J.B.</creatorcontrib><creatorcontrib>Kiser, T.E.</creatorcontrib><creatorcontrib>Boggs, D.L.</creatorcontrib><creatorcontrib>Lowery, R.S.</creatorcontrib><title>Effects of dietary energy level on luteinizing hormone and adrenal function in the post partum beef cow</title><title>Theriogenology</title><addtitle>Theriogenology</addtitle><description>The effects of dietary energy and suckling on adrenal function and luteinizing hormone (LH) concentrations were investigated in primiparous postpartum cows. Ten heifers were assigned at calving to either high (22.8 Mcal/day) or low (15.2 Mcal/day) energy diets. Blood samples were collected every 15 minutes for 8 hours on 28, 42, and 56 days post partum. Calves were allowed to suckle ad libitum during sampling periods. Serum samples were analyzed by radioimmunoassay for LH and cortisol. Concentrations of catecholamines were quantified by reverse-phase HPLC. Body weights were decreased (P<0.01) by low energy intake. In addition, low energy diet cows had lower mean LH concentrations (0.97 ± 0.09 vs 1.57 ± 0.07 ng/ml), P<0.05) than high energy diet cows. Luteinizing hormone concentrations in high energy diet cows increased with days post partum, resulting in a treatment-by-time interaction (P<0.005). Treatment did not affect mean cortisol concentrations. However, within 15 minutes of suckling cortisol release was significantly above baseline in 77% of the observed suckling events. Dihydroxyphenylalanine (DOPA) increased in high energy diet cows compared with that of low energy diet cows (2,833 ± 243 vs 1,294 ± 243 pg/ml, P<0.01). Norepinephrine (NE) and 3,4-dihydroxyphenylacetic acid (DOPAC) were not influenced by treatment. Plasma NE decreased during the postpartum interval (P<0.005). These data suggest that reduced energy intake may prevent the increase in LH associated with increasing days post partum and alter adrenal function. In addition, spontaneous suckling events elicit a release of cortisol.</description><subject>ALLAITEMENT</subject><subject>beef cows</subject><subject>BOVIN DE BOUCHERIE</subject><subject>CATECHOLAMINE</subject><subject>catecholamines</subject><subject>CATECOLAMINAS</subject><subject>cortisol</subject><subject>DIETA</subject><subject>DOPA</subject><subject>DURACION</subject><subject>DUREE</subject><subject>energy</subject><subject>ESTEROIDES</subject><subject>GANADO DE CARNE</subject><subject>GENISSE</subject><subject>LACTANCIA</subject><subject>NORADRENALINE</subject><subject>NOREPINEFRINA</subject><subject>NOVILLA</subject><subject>PESO</subject><subject>PLASMA SANGUIN</subject><subject>PLASMA SANGUINEO</subject><subject>POIDS</subject><subject>postpartum</subject><subject>PUERPERIO</subject><subject>PUERPERIUM</subject><subject>REGIME ALIMENTAIRE</subject><subject>STEROIDE</subject><subject>VACA</subject><subject>VACHE</subject><subject>VALEUR ENERGETIQUE</subject><subject>VALOR ENERGETICO</subject><issn>0093-691X</issn><issn>1879-3231</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1991</creationdate><recordtype>article</recordtype><recordid>eNp9kT1vFDEQhi1ERC6BP4AQcgcUG-z1rj8aJBQlgBKJAiLRWT57fDHatQ_bGxR-fXzcCbpUU8zzzmieQegVJWeUUP6eEMU6ruiPt4q-U2Rgqrt6glZUCtWxntGnaPUPOUYnpfwkhDDO6TN0TLnouZJshTYX3oOtBSePXYBq8j2GCHlzjye4gwmniKelQojhT4gbfJvynCJgEx02LkM0E_ZLtDU0MERcbwFvU6l4a3JdZrwG8Nim38_RkTdTgReHeopuLi--n3_urr9--nL-8bqzTMjajZRaCSMDIp33tueMEQEjgVEMxPfrUTIve967QVEjuGGMCzEO3LTAKJ1ip-jNfu42p18LlKrnUCxMk4mQlqIFGyiRRPBGDnvS5lRKBq-3Ocztfk2J3hnWO316p08rqv8a1lct9vqwYFnP4P6HDkob8HIPeJO02eRQ9M03RYeRENqaH_ZNaA7uAmRdbIBowYXc3qBdCo-vfwDPkpMv</recordid><startdate>19910701</startdate><enddate>19910701</enddate><creator>Hall, J.B.</creator><creator>Kiser, T.E.</creator><creator>Boggs, D.L.</creator><creator>Lowery, R.S.</creator><general>Elsevier Inc</general><scope>FBQ</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19910701</creationdate><title>Effects of dietary energy level on luteinizing hormone and adrenal function in the post partum beef cow</title><author>Hall, J.B. ; Kiser, T.E. ; Boggs, D.L. ; Lowery, R.S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c378t-511c8e53e08dffc263307e50e5740f2b583f8262d491a76a33677546ae0858d93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1991</creationdate><topic>ALLAITEMENT</topic><topic>beef cows</topic><topic>BOVIN DE BOUCHERIE</topic><topic>CATECHOLAMINE</topic><topic>catecholamines</topic><topic>CATECOLAMINAS</topic><topic>cortisol</topic><topic>DIETA</topic><topic>DOPA</topic><topic>DURACION</topic><topic>DUREE</topic><topic>energy</topic><topic>ESTEROIDES</topic><topic>GANADO DE CARNE</topic><topic>GENISSE</topic><topic>LACTANCIA</topic><topic>NORADRENALINE</topic><topic>NOREPINEFRINA</topic><topic>NOVILLA</topic><topic>PESO</topic><topic>PLASMA SANGUIN</topic><topic>PLASMA SANGUINEO</topic><topic>POIDS</topic><topic>postpartum</topic><topic>PUERPERIO</topic><topic>PUERPERIUM</topic><topic>REGIME ALIMENTAIRE</topic><topic>STEROIDE</topic><topic>VACA</topic><topic>VACHE</topic><topic>VALEUR ENERGETIQUE</topic><topic>VALOR ENERGETICO</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hall, J.B.</creatorcontrib><creatorcontrib>Kiser, T.E.</creatorcontrib><creatorcontrib>Boggs, D.L.</creatorcontrib><creatorcontrib>Lowery, R.S.</creatorcontrib><collection>AGRIS</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Theriogenology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hall, J.B.</au><au>Kiser, T.E.</au><au>Boggs, D.L.</au><au>Lowery, R.S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of dietary energy level on luteinizing hormone and adrenal function in the post partum beef cow</atitle><jtitle>Theriogenology</jtitle><addtitle>Theriogenology</addtitle><date>1991-07-01</date><risdate>1991</risdate><volume>36</volume><issue>1</issue><spage>107</spage><epage>116</epage><pages>107-116</pages><issn>0093-691X</issn><eissn>1879-3231</eissn><abstract>The effects of dietary energy and suckling on adrenal function and luteinizing hormone (LH) concentrations were investigated in primiparous postpartum cows. Ten heifers were assigned at calving to either high (22.8 Mcal/day) or low (15.2 Mcal/day) energy diets. Blood samples were collected every 15 minutes for 8 hours on 28, 42, and 56 days post partum. Calves were allowed to suckle ad libitum during sampling periods. Serum samples were analyzed by radioimmunoassay for LH and cortisol. Concentrations of catecholamines were quantified by reverse-phase HPLC. Body weights were decreased (P<0.01) by low energy intake. In addition, low energy diet cows had lower mean LH concentrations (0.97 ± 0.09 vs 1.57 ± 0.07 ng/ml), P<0.05) than high energy diet cows. Luteinizing hormone concentrations in high energy diet cows increased with days post partum, resulting in a treatment-by-time interaction (P<0.005). Treatment did not affect mean cortisol concentrations. However, within 15 minutes of suckling cortisol release was significantly above baseline in 77% of the observed suckling events. Dihydroxyphenylalanine (DOPA) increased in high energy diet cows compared with that of low energy diet cows (2,833 ± 243 vs 1,294 ± 243 pg/ml, P<0.01). Norepinephrine (NE) and 3,4-dihydroxyphenylacetic acid (DOPAC) were not influenced by treatment. Plasma NE decreased during the postpartum interval (P<0.005). These data suggest that reduced energy intake may prevent the increase in LH associated with increasing days post partum and alter adrenal function. In addition, spontaneous suckling events elicit a release of cortisol.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>16726983</pmid><doi>10.1016/0093-691X(91)90439-K</doi><tpages>10</tpages></addata></record> |
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| subjects | ALLAITEMENT beef cows BOVIN DE BOUCHERIE CATECHOLAMINE catecholamines CATECOLAMINAS cortisol DIETA DOPA DURACION DUREE energy ESTEROIDES GANADO DE CARNE GENISSE LACTANCIA NORADRENALINE NOREPINEFRINA NOVILLA PESO PLASMA SANGUIN PLASMA SANGUINEO POIDS postpartum PUERPERIO PUERPERIUM REGIME ALIMENTAIRE STEROIDE VACA VACHE VALEUR ENERGETIQUE VALOR ENERGETICO |
| title | Effects of dietary energy level on luteinizing hormone and adrenal function in the post partum beef cow |
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