Human colostral cells were pulsed with PHA, Con A, or LPS and cultivated in serum-free medium. The culture supernatants were tested for IL-1 activity in C3H/HeJ thymocyte assay and for IL-2 activity on human lymphoblasts. The IL-1 activity was the highest at the 24th h of cultivation and IL-2 activity at the 48th h of cultivation.
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