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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Veröffentlicht in:Journal of animal science 1998-11, Vol.76 (11), p.2853-2856
Hauptverfasser: Oliver, J.W, Strickland, J.R, Waller, J.C, Fribourg, H.A, Linnabary, R.D, Abney, L.K
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container_end_page 2856
container_issue 11
container_start_page 2853
container_title Journal of animal science
container_volume 76
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&amp;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. 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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.</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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source MEDLINE; Oxford University Press Journals All Titles (1996-Current)
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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