OPTIMAL CONDITIONS FOR INVITRO BLASTOGENESIS OF FELINE PERIPHERAL-BLOOD LYMPHOCYTES

Abstract

A microculture technique was developed for the in vitro blastogenesis of feline lymphocytes. Blastogenesis of ficoll-diatriazoate gradient separated mononuclear cell, washed blood and whole blood were compared. In general the whole blood cultures yielded higher stimulation indices (SI) than the washed blood or separated mononuclear cell cultures. The effect of several variables on the stimulation of lymphocyte cultures was examined. A cell concentration of 3 x 10(5) cells/well and a 1:20 dilution of washed and unwashed whole blood gave optimal stimulation with concanavalin A (Con A). Phytohaemagglutinin-P (PHA-P) did not give significant levels of stimulation. Inactivated fetal calf serum (F..