PMID- 8333833 OWN - NLM STAT- MEDLINE DCOM- 19930817 LR - 20131121 IS - 0006-291X (Print) IS - 0006-291X (Linking) VI - 194 IP - 1 DP - 1993 Jul 15 TI - Interleukin-1 induction of tumor necrosis factor-alpha mRNA and bioactive tumor necrosis factor-alpha in a pancreatic beta-cell line by a mechanism requiring no de novo protein synthesis. PG - 163-9 AB - Interleukin-1 (IL-1) has been implicated as an effector in insulitis of Type 1 (insulin-dependent) diabetes. Exposure of a beta-cell line (beta TC1) to IL-1 beta resulted in an increase of preproinsulin mRNA at 0.5 h followed by a gradual decrease. Tumor necrosis factor-alpha (TNF-alpha) mRNA expression by beta TC1 cells was demonstrated 1-3 h after the addition of IL-1 beta. TNF bioactivity was detected in homogenates of beta TC1 cells exposed to IL-1. The supplementation of cycloheximide (CHX) together with IL-1 beta resulted in the superinduction of TNF-alpha mRNA, suggesting that de novo protein synthesis is not required in IL-1-induced TNF-alpha mRNA expression. Endogenous TNF-alpha of beta-cells may be involved in the islet lesion of type 1 diabetes. FAU - Takane, N AU - Takane N AD - Department of Medicine, Kurume University School of Medicine, Fukuoka, Japan. FAU - Yamada, K AU - Yamada K FAU - Otabe, S AU - Otabe S FAU - Inoue, M AU - Inoue M FAU - Nonaka, K AU - Nonaka K LA - eng PT - Journal Article PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Actins) RN - 0 (Insulin) RN - 0 (Interleukin-2) RN - 0 (Protein Precursors) RN - 0 (RNA, Messenger) RN - 0 (Recombinant Proteins) RN - 0 (Tumor Necrosis Factor-alpha) RN - 61116-24-3 (preproinsulin) RN - 9035-68-1 (Proinsulin) RN - 98600C0908 (Cycloheximide) SB - IM MH - Actins/biosynthesis MH - Animals MH - Blotting, Northern MH - Cycloheximide/pharmacology MH - Gene Expression/*drug effects MH - Humans MH - Insulin MH - Interleukin-2/*pharmacology MH - Islets of Langerhans MH - Kinetics MH - Mice MH - Proinsulin/biosynthesis MH - Protein Precursors/biosynthesis MH - RNA, Messenger/*biosynthesis MH - Recombinant Proteins/pharmacology MH - Transcription, Genetic/drug effects MH - Tumor Cells, Cultured MH - Tumor Necrosis Factor-alpha/*biosynthesis EDAT- 1993/07/15 00:00 MHDA- 1993/07/15 00:01 CRDT- 1993/07/15 00:00 PHST- 1993/07/15 00:00 [pubmed] PHST- 1993/07/15 00:01 [medline] PHST- 1993/07/15 00:00 [entrez] AID - S0006-291X(83)71799-7 [pii] AID - 10.1006/bbrc.1993.1799 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 1993 Jul 15;194(1):163-9. doi: 10.1006/bbrc.1993.1799.