Endophytic fungal toxin effect on adrenergic receptors in lateral saphenous veins (cranial branch) of cattle grazing tall fescue
The objective of this research was to characterize the adrenergic receptor response in veins of cattle that grazed tail fescue (Festuca arundinacea Schreb.), with (E+) and without (E-) fungal endophyte (Neotyphodium coenophialum) infection. Measurement of contractile response of lateral saphenous ve...
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creator | Oliver, J.W Strickland, J.R Waller, J.C Fribourg, H.A Linnabary, R.D Abney, L.K |
description | The objective of this research was to characterize the adrenergic receptor response in veins of cattle that grazed tail fescue (Festuca arundinacea Schreb.), with (E+) and without (E-) fungal endophyte (Neotyphodium coenophialum) infection. Measurement of contractile response of lateral saphenous veins to selective adrenergic receptor agonists (alpha 1, phenylephrine; alpha 2, BHT-920) revealed enhanced reactivity (greater contractile response) only for the alpha 2 adrenergic receptor in E+ pastured cattle. This response was consistent over a 3-yr grazing period. Significant contractility differences in response to BHT-920 occurred at concentrations of 3 x 10-6 M and greater. Early research has reasoned that the enhanced reactivity is due to endophyte toxin effect on intracellular signaling systems. The enhanced contractile effect would alter blood flow dynamics and contribute to clinical signs and pathologic change in animals. The alpha 2-adrenergic receptor is also involved in the control of many metabolic reactions. Thus, for drug therapy to be successful in reversing the adverse effects of E+ tall fescue exposure in cattle, effects on the alpha 2-adrenergic tissue receptors must be neutralized. |
doi_str_mv | 10.2527/1998.76112853x |
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Measurement of contractile response of lateral saphenous veins to selective adrenergic receptor agonists (alpha 1, phenylephrine; alpha 2, BHT-920) revealed enhanced reactivity (greater contractile response) only for the alpha 2 adrenergic receptor in E+ pastured cattle. This response was consistent over a 3-yr grazing period. Significant contractility differences in response to BHT-920 occurred at concentrations of 3 x 10-6 M and greater. Early research has reasoned that the enhanced reactivity is due to endophyte toxin effect on intracellular signaling systems. The enhanced contractile effect would alter blood flow dynamics and contribute to clinical signs and pathologic change in animals. The alpha 2-adrenergic receptor is also involved in the control of many metabolic reactions. Thus, for drug therapy to be successful in reversing the adverse effects of E+ tall fescue exposure in cattle, effects on the alpha 2-adrenergic tissue receptors must be neutralized.</description><identifier>ISSN: 0021-8812</identifier><identifier>EISSN: 1525-3163</identifier><identifier>EISSN: 0021-8812</identifier><identifier>DOI: 10.2527/1998.76112853x</identifier><identifier>PMID: 9856395</identifier><language>eng</language><publisher>Savoy, IL: Am Soc Animal Sci</publisher><subject>Acremonium ; Adrenergic alpha-Agonists - pharmacology ; adrenergic receptors ; agonists ; Animals ; Azepines - pharmacology ; biochemical pathways ; Biological and medical sciences ; blood flow ; Cattle ; Cattle - physiology ; Circulatory system ; Diet ; endophytes ; Feeding. Feeding behavior ; Festuca arundinacea ; Fundamental and applied biological sciences. Psychology ; grazing ; hemodynamics ; Male ; mycotoxins ; Mycotoxins - toxicity ; Neotyphodium coenophialum ; pathological processes and conditions ; Phenylephrine - pharmacology ; Poaceae - microbiology ; Receptors, Adrenergic, alpha-1 - drug effects ; Receptors, Adrenergic, alpha-1 - physiology ; Receptors, Adrenergic, alpha-2 - drug effects ; Receptors, Adrenergic, alpha-2 - physiology ; Saphenous Vein - drug effects ; Saphenous Vein - physiology ; Vasoconstriction - drug effects ; veins ; Vertebrates: anatomy and physiology, studies on body, several organs or systems ; Zoology</subject><ispartof>Journal of animal science, 1998-11, Vol.76 (11), p.2853-2856</ispartof><rights>1999 INIST-CNRS</rights><rights>Copyright American Society of Animal Science Nov 1998</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c402t-8262d35753dd53f41cc77d6581f6b0c665d70c72ac3cb2e41122755860fa38953</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1638120$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/9856395$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Oliver, J.W</creatorcontrib><creatorcontrib>Strickland, J.R</creatorcontrib><creatorcontrib>Waller, J.C</creatorcontrib><creatorcontrib>Fribourg, H.A</creatorcontrib><creatorcontrib>Linnabary, R.D</creatorcontrib><creatorcontrib>Abney, L.K</creatorcontrib><title>Endophytic fungal toxin effect on adrenergic receptors in lateral saphenous veins (cranial branch) of cattle grazing tall fescue</title><title>Journal of animal science</title><addtitle>J Anim Sci</addtitle><description>The objective of this research was to characterize the adrenergic receptor response in veins of cattle that grazed tail fescue (Festuca arundinacea Schreb.), with (E+) and without (E-) fungal endophyte (Neotyphodium coenophialum) infection. Measurement of contractile response of lateral saphenous veins to selective adrenergic receptor agonists (alpha 1, phenylephrine; alpha 2, BHT-920) revealed enhanced reactivity (greater contractile response) only for the alpha 2 adrenergic receptor in E+ pastured cattle. This response was consistent over a 3-yr grazing period. Significant contractility differences in response to BHT-920 occurred at concentrations of 3 x 10-6 M and greater. Early research has reasoned that the enhanced reactivity is due to endophyte toxin effect on intracellular signaling systems. The enhanced contractile effect would alter blood flow dynamics and contribute to clinical signs and pathologic change in animals. The alpha 2-adrenergic receptor is also involved in the control of many metabolic reactions. Thus, for drug therapy to be successful in reversing the adverse effects of E+ tall fescue exposure in cattle, effects on the alpha 2-adrenergic tissue receptors must be neutralized.</description><subject>Acremonium</subject><subject>Adrenergic alpha-Agonists - pharmacology</subject><subject>adrenergic receptors</subject><subject>agonists</subject><subject>Animals</subject><subject>Azepines - pharmacology</subject><subject>biochemical pathways</subject><subject>Biological and medical sciences</subject><subject>blood flow</subject><subject>Cattle</subject><subject>Cattle - physiology</subject><subject>Circulatory system</subject><subject>Diet</subject><subject>endophytes</subject><subject>Feeding. Feeding behavior</subject><subject>Festuca arundinacea</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>grazing</subject><subject>hemodynamics</subject><subject>Male</subject><subject>mycotoxins</subject><subject>Mycotoxins - toxicity</subject><subject>Neotyphodium coenophialum</subject><subject>pathological processes and conditions</subject><subject>Phenylephrine - pharmacology</subject><subject>Poaceae - microbiology</subject><subject>Receptors, Adrenergic, alpha-1 - drug effects</subject><subject>Receptors, Adrenergic, alpha-1 - physiology</subject><subject>Receptors, Adrenergic, alpha-2 - drug effects</subject><subject>Receptors, Adrenergic, alpha-2 - physiology</subject><subject>Saphenous Vein - drug effects</subject><subject>Saphenous Vein - physiology</subject><subject>Vasoconstriction - drug effects</subject><subject>veins</subject><subject>Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><subject>Zoology</subject><issn>0021-8812</issn><issn>1525-3163</issn><issn>0021-8812</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNpFkT1vFDEQhi0ECpdAS4ewEBJQ7OGxzx9boih8SJEoILXl89q7e9qzF9sbEip-eny6U6imeJ95R3oGoVdA1pRT-QnaVq2lAKCKs7snaAWc8oaBYE_RihAKjVJAn6PznHeEAOUtP0NnreKCtXyF_l2FLs7DfRkt9kvozYRLvBsDdt47W3AM2HTJBZf6SiRn3VxiyrgSkykuVT6beXAhLhnfujFk_MEmE8YabOu0w0ccPbamlMnhPpm_Y-hxMdOEvct2cS_QM2-m7F6e5gW6-XL16_Jbc_3j6_fLz9eN3RBaGkUF7RiXnHUdZ34D1krZCa7Aiy2xQvBOEiupscxuqdtUH1RyrgTxhqmWswv09tg7p_h7cbnoXVxSqCc1BQUEBBUVWh8hm2LOyXk9p3Fv0r0Gog-69UG3ftRdF16fWpft3nWP-Mlvzd-dcpOtmfzByJj_twpWn0Mq9v6IDWM__BmT03lfFdVS0DuTpdAA-nCxkm-OpDdRmz7VspuflAAjtCVc0g17AHUBnik</recordid><startdate>19981101</startdate><enddate>19981101</enddate><creator>Oliver, J.W</creator><creator>Strickland, J.R</creator><creator>Waller, J.C</creator><creator>Fribourg, H.A</creator><creator>Linnabary, R.D</creator><creator>Abney, L.K</creator><general>Am Soc Animal Sci</general><general>American Society of Animal Science</general><general>Oxford University Press</general><scope>FBQ</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7RQ</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>88I</scope><scope>8AF</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>L6V</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>M2P</scope><scope>M7P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>PATMY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>S0X</scope><scope>U9A</scope></search><sort><creationdate>19981101</creationdate><title>Endophytic fungal toxin effect on adrenergic receptors in lateral saphenous veins (cranial branch) of cattle grazing tall fescue</title><author>Oliver, J.W ; Strickland, J.R ; Waller, J.C ; Fribourg, H.A ; Linnabary, R.D ; Abney, L.K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c402t-8262d35753dd53f41cc77d6581f6b0c665d70c72ac3cb2e41122755860fa38953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Acremonium</topic><topic>Adrenergic alpha-Agonists - pharmacology</topic><topic>adrenergic receptors</topic><topic>agonists</topic><topic>Animals</topic><topic>Azepines - pharmacology</topic><topic>biochemical pathways</topic><topic>Biological and medical sciences</topic><topic>blood flow</topic><topic>Cattle</topic><topic>Cattle - physiology</topic><topic>Circulatory system</topic><topic>Diet</topic><topic>endophytes</topic><topic>Feeding. Feeding behavior</topic><topic>Festuca arundinacea</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>grazing</topic><topic>hemodynamics</topic><topic>Male</topic><topic>mycotoxins</topic><topic>Mycotoxins - toxicity</topic><topic>Neotyphodium coenophialum</topic><topic>pathological processes and conditions</topic><topic>Phenylephrine - pharmacology</topic><topic>Poaceae - microbiology</topic><topic>Receptors, Adrenergic, alpha-1 - drug effects</topic><topic>Receptors, Adrenergic, alpha-1 - physiology</topic><topic>Receptors, Adrenergic, alpha-2 - drug effects</topic><topic>Receptors, Adrenergic, alpha-2 - physiology</topic><topic>Saphenous Vein - drug effects</topic><topic>Saphenous Vein - physiology</topic><topic>Vasoconstriction - drug effects</topic><topic>veins</topic><topic>Vertebrates: anatomy and physiology, studies on body, several organs or systems</topic><topic>Zoology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Oliver, J.W</creatorcontrib><creatorcontrib>Strickland, J.R</creatorcontrib><creatorcontrib>Waller, J.C</creatorcontrib><creatorcontrib>Fribourg, H.A</creatorcontrib><creatorcontrib>Linnabary, R.D</creatorcontrib><creatorcontrib>Abney, L.K</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Career & Technical Education Database</collection><collection>Agricultural Science Collection</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Biology Database (Alumni Edition)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM 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Sci</addtitle><date>1998-11-01</date><risdate>1998</risdate><volume>76</volume><issue>11</issue><spage>2853</spage><epage>2856</epage><pages>2853-2856</pages><issn>0021-8812</issn><eissn>1525-3163</eissn><eissn>0021-8812</eissn><abstract>The objective of this research was to characterize the adrenergic receptor response in veins of cattle that grazed tail fescue (Festuca arundinacea Schreb.), with (E+) and without (E-) fungal endophyte (Neotyphodium coenophialum) infection. Measurement of contractile response of lateral saphenous veins to selective adrenergic receptor agonists (alpha 1, phenylephrine; alpha 2, BHT-920) revealed enhanced reactivity (greater contractile response) only for the alpha 2 adrenergic receptor in E+ pastured cattle. This response was consistent over a 3-yr grazing period. Significant contractility differences in response to BHT-920 occurred at concentrations of 3 x 10-6 M and greater. Early research has reasoned that the enhanced reactivity is due to endophyte toxin effect on intracellular signaling systems. The enhanced contractile effect would alter blood flow dynamics and contribute to clinical signs and pathologic change in animals. The alpha 2-adrenergic receptor is also involved in the control of many metabolic reactions. Thus, for drug therapy to be successful in reversing the adverse effects of E+ tall fescue exposure in cattle, effects on the alpha 2-adrenergic tissue receptors must be neutralized.</abstract><cop>Savoy, IL</cop><pub>Am Soc Animal Sci</pub><pmid>9856395</pmid><doi>10.2527/1998.76112853x</doi><tpages>4</tpages></addata></record> |
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subjects | Acremonium Adrenergic alpha-Agonists - pharmacology adrenergic receptors agonists Animals Azepines - pharmacology biochemical pathways Biological and medical sciences blood flow Cattle Cattle - physiology Circulatory system Diet endophytes Feeding. Feeding behavior Festuca arundinacea Fundamental and applied biological sciences. Psychology grazing hemodynamics Male mycotoxins Mycotoxins - toxicity Neotyphodium coenophialum pathological processes and conditions Phenylephrine - pharmacology Poaceae - microbiology Receptors, Adrenergic, alpha-1 - drug effects Receptors, Adrenergic, alpha-1 - physiology Receptors, Adrenergic, alpha-2 - drug effects Receptors, Adrenergic, alpha-2 - physiology Saphenous Vein - drug effects Saphenous Vein - physiology Vasoconstriction - drug effects veins Vertebrates: anatomy and physiology, studies on body, several organs or systems Zoology |
title | Endophytic fungal toxin effect on adrenergic receptors in lateral saphenous veins (cranial branch) of cattle grazing tall fescue |
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