PMID- 7740833 OWN - NLM STAT- MEDLINE DCOM- 19950607 LR - 20150901 IS - 0513-5796 (Print) IS - 0513-5796 (Linking) VI - 36 IP - 1 DP - 1995 Mar TI - Induction of ICAM-1 and HLA-DR expression by IFN-gamma in malignant melanoma cell lines. PG - 15-25 AB - Two human malignant melanoma cell lines, Malme-3M and SK-Mel-28, were analyzed for their ability to induce the expression of intercellular adhesion molecule 1 (ICAM-1) and human leukocyte antigen (HLA)-DR molecules on their cell surfaces as well as at the transcriptional level before and after treatment with interferon (IFN)-gamma. Both cell lines demonstrated a high percentage (> 99%) of ICAM-1 expression regardless of IFN-gamma treatment. Before IFN-gamma treatment, Malme-3M cells barely expressed HLA-DR molecules (< 2%) and SK-Mel-28 cells demonstrated a relatively high percentage (> 50%) of HLA-DR expression. Both cell lines displayed elevated levels of HLA-DR expression in a time dependent manner after IFN-gamma treatment. However, these two cell lines have been shown to respond differentially to IFN-gamma. The molecular mechanism underlying such a differential behavior was investigated, and HLA-DR gene regulation was studied at the transcriptional level. Treatment with IFN-gamma led to the steady-state mRNA augmentation of the HLR-DR gene. The HLA-DRA mRNA augmentation was similar in both cell lines, whereas in Malme-3M, IFN-gamma did not augment the rate of transcription of the HLA-DRB gene as much as in SK-Mel-28. Data from this study established the fact that the melanoma cell lines displayed a differential susceptibility to IFN-gamma on the modulation of HLA-DR molecules, and this modulation was transcriptionally regulated. FAU - Kim, J D AU - Kim JD AD - Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea. FAU - Lee, J L AU - Lee JL FAU - Park, J H AU - Park JH FAU - Lee, J M AU - Lee JM FAU - Kim, Y H AU - Kim YH FAU - Kim, S J AU - Kim SJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Korea (South) TA - Yonsei Med J JT - Yonsei medical journal JID - 0414003 RN - 0 (HLA-DR Antigens) RN - 126547-89-5 (Intercellular Adhesion Molecule-1) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Genes, MHC Class II MH - HLA-DR Antigens/*metabolism MH - Humans MH - Intercellular Adhesion Molecule-1/*metabolism MH - Interferon-gamma/*pharmacology MH - Melanoma/*metabolism/pathology MH - Transcription, Genetic MH - Tumor Cells, Cultured EDAT- 1995/03/01 00:00 MHDA- 1995/03/01 00:01 CRDT- 1995/03/01 00:00 PHST- 1995/03/01 00:00 [pubmed] PHST- 1995/03/01 00:01 [medline] PHST- 1995/03/01 00:00 [entrez] AID - 10.3349/ymj.1995.36.1.15 [doi] PST - ppublish SO - Yonsei Med J. 1995 Mar;36(1):15-25. doi: 10.3349/ymj.1995.36.1.15.