PMID- 9609459 OWN - NLM STAT- MEDLINE DCOM- 19980720 LR - 20180213 IS - 1660-8151 (Print) IS - 1660-8151 (Linking) VI - 79 IP - 1 DP - 1998 TI - A high glucose concentration stimulates the expression of monocyte chemotactic peptide 1 in human mesangial cells. PG - 33-7 AB - The mechanism of glomerular infiltration of monocytes remains unknown in diabetic nephropathy. We examined the effect of a high glucose concentration on monocyte chemotactic peptide 1 (MCP-1) expression in human mesangial cells (MCs) by using enzyme-linked immunosorbent assay and reverse transcription coupled with polymerase chain reaction (PCR). More than a 50% increase in the MCP-1 protein production was observed in MCs cultured in high-glucose medium (450 mg/dl) as compared to normal glucose (100 mg/dl; 1,496 +/- 75 vs. 966 +/- 15 pg/ml after 24 h, 1,910 +/- 93 vs. 1,250 +/- 55 pg/ml after 48 h). Semiquantitative PCR showed that phorbol myristate acetate (100 nM) increased the ratio of PCR products for MCP-1 to housekeeping gene glyceraldehyde-3-phosphate dehydrogenase on densitometric results at 24 h by 2.7-fold, which was prevented by calphostin C (200 nM) pretreatment. High glucose increased the ratio by 3-fold as compared to normal glucose at 24 h (0.72 +/- 0.11 vs. 0.24 +/- 0.01). This was also suppressed by calphostin C pretreatment. These findings demonstrate that high glucose can directly increase MCP-1 expression in MCs, which may contribute to monocyte infiltration in diabetic nephropathy, and this is regulated by protein kinase C. FAU - Ihm, C G AU - Ihm CG AD - Department of Internal Medicine, College of Medicine, Kyung Hee University, Seoul, Korea. FAU - Park, J K AU - Park JK FAU - Hong, S P AU - Hong SP FAU - Lee, T W AU - Lee TW FAU - Cho, B S AU - Cho BS FAU - Kim, M J AU - Kim MJ FAU - Cha, D R AU - Cha DR FAU - Ha, H AU - Ha H LA - eng PT - Journal Article PL - Switzerland TA - Nephron JT - Nephron JID - 0331777 RN - 0 (Chemokine CCL2) RN - 0 (Enzyme Inhibitors) RN - 0 (Naphthalenes) RN - 0 (RNA, Messenger) RN - EC 2.7.11.13 (Protein Kinase C) RN - I271P23G24 (calphostin C) RN - IY9XDZ35W2 (Glucose) RN - NI40JAQ945 (Tetradecanoylphorbol Acetate) SB - IM MH - Cells, Cultured MH - Chemokine CCL2/*metabolism MH - Diabetic Neuropathies/physiopathology MH - Enzyme Inhibitors/pharmacology MH - Gene Expression Regulation/*drug effects MH - Glomerular Mesangium/*metabolism MH - Glucose/*pharmacology MH - Humans MH - Monocytes/*metabolism MH - Naphthalenes/pharmacology MH - Protein Kinase C/antagonists & inhibitors MH - RNA, Messenger/metabolism MH - Tetradecanoylphorbol Acetate/pharmacology EDAT- 1998/06/03 02:04 MHDA- 2000/10/06 11:01 CRDT- 1998/06/03 02:04 PHST- 1998/06/03 02:04 [pubmed] PHST- 2000/10/06 11:01 [medline] PHST- 1998/06/03 02:04 [entrez] AID - nef79033 [pii] AID - 10.1159/000044988 [doi] PST - ppublish SO - Nephron. 1998;79(1):33-7. doi: 10.1159/000044988.