Korean J Dermatol.  1992 Oct;30(5):601-607.

Effect of 8-methoxypsoralen on PHA-induced DNA synthesis of human lymphocyte in the absence of UVA

• Chung JH
• Kim KH
• Youn JI
• Ree JH

Abstract

We have observed the dark effect of 8-methoxypsoralen (8-MOP) on the viability and DNA synthesis in human lymphocyte cultures after stimulation with phytohemagglutinin (PHA) in the absence of ultraviolet A radiation. The concentrations of 8-MOP was 0.5-3.2 microgram/ml. We have also measured the LDH activity in supernatants of lymphocyte cultures treated with 8-MOP. The results were as follows: 1. There was no 8-MOP dose-dependent decrease in the viability of lymphocytes up to 8MOP 32microgram/ml. 2. There was 8-MOP dose-dependent decrease in PHA-induced DNA synthesis of lymphocytes from the concentration of 8-MOP 2microgram/ml. 3. There was a time-dependent decrease in PHA-induced DNA synthesis of lymphocytes at the conscentration of 8-MOP 32microgram/ml. 4. There was no LDH release in supernatant of lymphocyte cultures after incubation with 8-MOP up to 8-MOP 32microgram/ml.

MeSH Terms

DNA*
Humans*
Lymphocytes*
Methoxsalen*
DNA
Methoxsalen