Studies on human lymphocytes in frozen tissue section: viability and spontaneous rosette formation with sheep...

Sixty to 70% viability of lymphocytes in frozen tissue section was obtained by using dimethylsulphoxide-containing medium as a cryoprotective agent and by conditioning time and temperature for freezing, making sections on a cryostat and thawing. The aviable and dead cells were differentiated by trypan blue exclusion test on section. Lymphocytes in tissue sections showed spontaneous rosette formation with sheep erythrocytes (E rosette) with specific localization for each lymphoid organ.