02530naa a2200337 a 450000100080000000500110000800800410001902400630006010000230012324501190014626000090026550000260027452015040030065000170180465000180182165000180183965000120185765000160186965300230188565300190190865300230192765300170195070000200196770000260198770000200201370000200203370000250205370000250207870000230210377300660212621334502021-08-19       2020    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.5433/1679-0359.2020v41n5Supl1p24452DOI1 aRIBEIRO, L. dos S.  aChromium supplementation modulates glucose metabolism in heatstressed Girolando dairy cows.h[electronic resource]  c2020  aShort communications.  aThe objective of this study was to evaluate the effects of dietary chromium supplementation on hepatic gene expression of lactating Girolando (Holstein x Gyr) cows under heat stress conditions in climatic chamber. Thirty-six ¾ Holstein x Gyr lactating cows were used, based on a 2x3 factorial scheme, to evaluate the effects of two diets (0 vs 0.50 mg of organic chromium kg-1 dry matter) and three environmental conditions (ECs): heat stress conditions in climatic chamber with ad libitum feeding (HS), a thermoneutral environment with ad libitum feeding (TN), and a pair-fed group in a thermoneutral environment (PF). Under HS group, the expression levels of glucose transporter 2 (GLUT2), glucose-6-phosphatase (G6Pase), and growth hormone receptor (rGH) were downregulated (P &lt 0.05) in chromium-supplemented cows compared to those in cows fed the control diet. GLUT2 expression was upregulated (P = 0.02) in the HS group and insulin-like growth factor 1 (IGF1) was downregulated (P &lt 0.01) in the PF group in cows fed the control diet compared to the expression in the TN group. No differences were observed between the ECs in terms of relative abundances of GLUT2, phosphoenolpyruvate carboxykinase (PEPCK), G6Pase, rGH, and IGF1 transcripts among the chromium-supplemented cows (P &gt 0.05). Heat stress caused changes in the expression of genes related to glucose metabolism, and organic chromium could modulate glucose metabolism in animals under heat stress conditions to some extent.  aDairy cattle  aGado Leiteiro  aGado Mestiço  aGlicose  aMetabolismo  aBiópsia hepática  aCrossbred cows  aGlucose metabolism  aLiver biopsy1 aBRANDÃO, F. Z.1 aCARVALHEIRA, L. de R.1 aLEMOS, D. R. de1 aSOUZA, G. T. de1 aBATISTA, R. I. T. P.1 aCAMARGO, L. S. de A.1 aCARVALHO, B. C. de  tSemina: Ciências Agráriasgv. 41, n. 5, p. 2445-2452, 2020.