1. 1. Prolonged benzpyrene treatment during lactation reduced the number of glucocorticoid receptors of offspring in adulthood significantly without altering the receptor affinity. 2. 2. Dexamethasone treatment identical to benzpyrene exposure had no effect either on receptor number or affinity. 3. 3. The results of the present investigations draw attention to the possible way of receptor alteration via breastmilk.
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