PMID- 11330673 OWN - NLM STAT- MEDLINE DCOM- 20011025 LR - 20031114 IS - 0916-8451 (Print) IS - 0916-8451 (Linking) VI - 65 IP - 3 DP - 2001 Mar TI - Oxidative stress by visible light irradiation suppresses immunoglobulin production in mouse spleen lymphocytes. PG - 593-8 AB - In this study, we attempted to induce the oxidative stress in mouse spleen lymphocytes with visible light irradiation and examined the effects of lipid peroxidation on immunoglobulin (Ig) production. The spleen lymphocytes were isolated from 8-week-old male balb/c mice and irradiated with 300 W visible light. When the cells were cultured for 72 hr, Ig contents in culture supernatants were decreased gradually by irradiation for over 30 min. The cell viability was also lowered by the irradiation. Intracellular phosphatidylcholine hydroperoxide (PCOOH) levels and thiobarbituric acid-reactive substances (TBARS) values in culture supernatants were measured as indices of lipid peroxidation and we found that Ig production by mouse spleen lymphocytes was suppressed accompanied with the progress of peroxidation of intracellular phospholipids. Cell membrane fluidity was also significantly decreased, but the intracellular Ig level was not changed in the irradiated cells. These results suggest that the peroxidation of intracellular lipids is a cause of the suppression of Ig production by mouse spleen lymphocytes via lowering cell viability and suppressing Ig synthesis and secretion. FAU - Miyazaki, Y AU - Miyazaki Y AD - Institute of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Graduate School of Kyushu University, Fukuoka, Japan. FAU - Yamasaki, M AU - Yamasaki M FAU - Mishima, H AU - Mishima H FAU - Mansho, K AU - Mansho K FAU - Tachibana, H AU - Tachibana H FAU - Yamada, K AU - Yamada K LA - eng PT - Journal Article PL - England TA - Biosci Biotechnol Biochem JT - Bioscience, biotechnology, and biochemistry JID - 9205717 RN - 0 (Immunoglobulin G) RN - 0 (Immunoglobulin M) RN - 1406-18-4 (Vitamin E) SB - IM MH - Animals MH - Cell Membrane/radiation effects MH - Cells, Cultured MH - Immunoglobulin G/*biosynthesis MH - Immunoglobulin M/*biosynthesis MH - Intracellular Fluid/metabolism MH - Light MH - *Lipid Peroxidation MH - Lymphocytes/drug effects/immunology/*radiation effects MH - Male MH - Membrane Fluidity/radiation effects MH - Mice MH - Mice, Inbred BALB C MH - *Oxidative Stress MH - Spleen/immunology MH - Vitamin E/metabolism/pharmacology EDAT- 2001/05/02 10:00 MHDA- 2001/10/26 10:01 CRDT- 2001/05/02 10:00 PHST- 2001/05/02 10:00 [pubmed] PHST- 2001/10/26 10:01 [medline] PHST- 2001/05/02 10:00 [entrez] AID - 10.1271/bbb.65.593 [doi] PST - ppublish SO - Biosci Biotechnol Biochem. 2001 Mar;65(3):593-8. doi: 10.1271/bbb.65.593.