The effects of phenoxybenzamine and cold stress on tyrosine hydroxylase enzyme activity and expression of tyrosine hydroxylase gene in the rat adrenal medulla

The effects of cold exposure and cold plus phenoxybenzamine treatment on tyrosine hydroxylase (TH) activity and TH m RNA levels were investigated in the adrenal medulla of Sprague Dawley (SD) rats. SD rats were exposed to cold (4 °C) for 48 hours.