Thermotolerance, health profile and cellular expression of HSP90AB1 in Nguni and Boran cows raised on natural pastures under tropical conditions

Abstract Boran (n=15) and Nguni (n=15) cows were used in a study to determine the effect of breed, age and coat colour on the concentration of heat shock protein 90 (HSP90AB1), physiological rectal and skin temperature, and markers of health. The cows were exposed to summer heat stress and Boran cows had higher significant (P 0.05) influence. Significantly (P 0.05) on the concentration of HSP90AB1, although older cows (≥9 years) had higher concentrations (5.4±1.29 ng/ml). Age had a significant (P