PMID- 1254932 OWN - NLM STAT- MEDLINE DCOM- 19760525 LR - 20170214 IS - 0022-1554 (Print) IS - 0022-1554 (Linking) VI - 24 IP - 1 DP - 1976 Jan TI - Quantitation of lymphocyte response to antigen by flow cytofluorometry. PG - 378-82 AB - The response of human peripheral blood lymphocytes to antigenic stimulation has been studied in vitro using flow cytofluorometry and an acridine orange (AO) staining technique for cellular deoxyribonucleic acid and ribonucleic acid (RNA). Antigen-stimulated "pyroninophillic" immunoblasts, identified by an increase in cellular content of RNA (red fluorescence with AO), were quantitated in triplicate cultures incubated up to 7 days with and without bacterial antigen. These results were similar to 14C-thymidine incorporation into identical cultures incubated in parallel. Cytofluorometric analysis showed a peak in percentage of immunoblasts after 6 days in culture, while maximum thymidine incorporation was seen on day 7. Cells from patients with depressed immune response secondary to cancer showed lower than normal antigen response by cytofluorometry. Kinetic studies revealed both a lower percentage of immunoblasts when compared to normal and a lower average per cell RNA content of the stimulated cells. AO cytofluorometry is suggested as a convenient method of simultaneously assessing lymphocyte proliferative and nonproliferative response to antigen. FAU - Braunstein, J D AU - Braunstein JD FAU - Good, R A AU - Good RA FAU - Hansen, J A AU - Hansen JA FAU - Sharpless, T K AU - Sharpless TK FAU - Melamed, M R AU - Melamed MR LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Histochem Cytochem JT - The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society JID - 9815334 RN - 0 (Antigens, Fungal) RN - 9007-49-2 (DNA) RN - VC2W18DGKR (Thymidine) SB - IM MH - *Antigens, Fungal MH - Autoanalysis MH - Candida MH - DNA/biosynthesis MH - Humans MH - *Lymphocyte Activation MH - Lymphocytes/cytology/*immunology/metabolism MH - Microscopy, Fluorescence/methods MH - Thymidine/metabolism EDAT- 1976/01/01 00:00 MHDA- 1976/01/01 00:01 CRDT- 1976/01/01 00:00 PHST- 1976/01/01 00:00 [pubmed] PHST- 1976/01/01 00:01 [medline] PHST- 1976/01/01 00:00 [entrez] AID - 10.1177/24.1.1254932 [doi] PST - ppublish SO - J Histochem Cytochem. 1976 Jan;24(1):378-82. doi: 10.1177/24.1.1254932.