Results 161 to 170 of about 948 (186)

Simplified Sample Preparation for HPLC Analysis of Ergovaline in Tall Fescue

Crop Science, 1993
Increased interest in the endophytic fungus, Acremonium coenophialum Morgan‐Jones & Gams, and its symbiotic inhabitance of tall fescue, Festuca arundinacea Schreb., has created the need for rapid and reliable ergovaline analysis in research and in extension service (for diagnosis).
Nicholas S. Hill, George E. Rottinghaus, Christopher S. Agee, Linda M. Schultz   +3 more
openaire   +1 more source

Bioaccumulation of ergovaline in bovine lateral saphenous veins in vitro.

Journal of animal science, 2009
Ergot alkaloids have been associated with vasoconstriction in grazing livestock affected by the fescue toxicosis syndrome. Previous in vitro investigations studying how ergot alkaloids caused vasoconstriction have shown that ergovaline has a distinct receptor affinity and sustained contractile response. A similar contractile response has not been noted
J L, Klotz, B H, Kirch, G E, Aiken, L P, Bush, J R, Strickland   +4 more
openaire   +1 more source

Herbage Mass, Nutritive Value, and Ergovaline Concentration of Stockpiled Tall Fescue

Crop Science, 2003
Tall fescue (Festuca arundinacea Schreb.) infected with an endophyte that does not produce ergot‐like alkaloids (nontoxic endophyte) has not been evaluated for herbage mass, nutritive value, and ergovaline concentration when stockpiled during winter. Our objective was to quantify these responses for tall fescue infected with a native endophyte (K31 E+),
R. L. Kallenbach, G. J. Bishop‐Hurley, M. D. Massie, G. E. Rottinghaus, C. P. West   +4 more
openaire   +1 more source

ERGOVALINE TOXICITY ON CACO-2 CELLS AS ASSESSED BY MTT, ALAMARBLUE, AND DNA ASSAY

In Vitro Cellular and Developmental Biology-Animal, 2003
The exact mechanisms of fescue toxicity in animals have yet to be established, but it has been associated with an inability to thrive. Ergovaline is the major ergopeptine alkaloid associated with fungal infections of tall fescue. Gastrointestinal (GI) toxicity of ergovaline (10(-11) to 10(-4) M) was evaluated in Caco-2 cells (mimicking the GI ...
openaire   +2 more sources

DETERMINATION OF ERGOVALINE IN ENDOPHYTED SEEDS BY HIGH PERFORMANCE THIN LAYER CHROMATOGRAPHY (HPTLC)

Journal of Liquid Chromatography & Related Technologies, 2000
High performance thin layer chromatography (HPTLC) is used to rapidly determine the presence and amount of ergovalin in seeds of Graminaceae infested with Neotyphodium Coenophialum. Quinine is used as an internal standard. The mycotoxin is solubilized under acid conditions and extracted with chloroform under alkaline conditions.
Videmann, B., Bony, Sylvie, Berny, Philippe   +2 more
openaire   +2 more sources

Ruminal tryptophan-utilizing bacteria degrade ergovaline from tall fescue seed extract

Journal of Animal Science, 2017
The objectives of this study were to evaluate degradation of ergovaline in a tall fescue [ (Schreb.) Darbysh.] seed extract by rumen microbiota ex vivo and to identify specific bacteria capable of ergovaline degradation in vitro. Rumen cell suspensions were prepared by harvesting rumen fluid from fistulated wether goats ( = 3), straining, and ...
B E, Harlow, J P, Goodman, B C, Lynn, M D, Flythe, H, Ji, G E, Aiken   +5 more
openaire   +2 more sources

Effect of ergovaline, lolinc, and dopamine antagonists on rat pituitary cell prolactin release in vitro

American Journal of Veterinary Research, 1994
Summary Cultured rat pituitary cells were studied to: determine the effects of ergovaline and loline on in vitro prolactin release; delineate the agonistic activity of these alkaloids at the D2 dopamine receptor, using 2 selective D2 dopamine receptor antagonists; and compare the efficacy of 2 dopamine receptor antagonists in reversing effects of the ...
J R, Strickland, D L, Cross, G P, Birrenkott, L W, Grimes   +3 more
openaire   +2 more sources

Bioaccumulation of ergovaline in bovine lateral saphenous veins in vitro1,2

Journal of Animal Science, 2009
J. L. Klotz, B. H. Kirch, G. E. Aiken, L. P. Bush, J. R. Strickland   +4 more
openaire   +1 more source

Ergovaline-induced vasoconstriction in an isolated bovine lateral saphenous vein bioassay.

Journal of animal science, 2007
Ergovaline has been proposed as a toxic component of endophyte-infected tall fescue. As many of the symptoms of fescue toxicosis are a result of compromised circulation, the objective of this study was to examine the vasoconstrictive potentials of ergovaline and a more documented ergopeptine, ergotamine, using a bovine, lateral (cranial branch ...
J L, Klotz, L P, Bush, D L, Smith, W D, Shafer, L L, Smith, B C, Arrington, J R, Strickland   +6 more
openaire   +1 more source

Toxicity of endophyte-infected ryegrass hay containing high ergovaline level in lactating ewes.

Journal of animal science, 2015
The symbiotic association of var. (formerly named ) with perennial ryegrass () leads to the production of ergovaline (EV) and lolitrem B (LB) that are toxic for livestock. The objectives of this study were to determine the effects of feeding endophyte-infected ryegrass (SE+) hay on 16 lactating ewes (BW 80 ± 10 kg) in comparison with endophyte-free ...
Zbib, Nasrallah, Repussard, Céline, Tardieu, D., Priymenko, Nathalie, Domange, Céline, Guerre, P.   +5 more
openaire   +3 more sources