PMID- 7865217 OWN - NLM STAT- MEDLINE DCOM- 19950330 LR - 20181130 IS - 1044-1549 (Print) IS - 1044-1549 (Linking) VI - 12 IP - 2 DP - 1995 Feb TI - Tumor necrosis factor-alpha induces mucin hypersecretion and MUC-2 gene expression by human airway epithelial cells. PG - 196-204 AB - Tumor necrosis factor-alpha (TNF-alpha) is a multifunctional, proinflammatory cytokine that is capable of activating a diverse number of target genes within multiple cell types. Little information is known regarding the role of TNF-alpha in the regulation of human airway mucin hypersecretion and MUC-2 gene expression. To assess the effect of TNF-alpha exposure on mucin secretion, human airway organ cultures and primary cultures of human airway epithelial cells were stimulated with 20 ng/ml of recombinant human TNF-alpha and mucin secretion quantitated by an enzyme-linked immunosorbent assay using a specific monoclonal antibody directed against human airway mucin. Significant increases in mucin secretion from human airway organ cultures were initially detected at 1 h, peaked at 8 h, and persisted for 24 h. The TNF-alpha-mediated mucin hypersecretion at 8 h was concentration dependent. Significant increases in mucin secretion from primary cultures of human airway epithelial cells were initially detected at 4 h, peaked at 48 h, and persisted for 72 h after stimulation with 20 ng/ml of recombinant human TNF-alpha. The TNF-alpha-mediated mucin hypersecretion at 48 h from primary cultures of human airway epithelial cells was inhibited by coincubation with soluble 55 kD, type I TNF receptors. Using reverse transcription-polymerase chain reaction and a human pulmonary mucoepidermoid carcinoma cell line (NCI-H292), increases in MUC-2 steady-state mRNA levels were first detectable after 30 min of TNF-alpha stimulation and persisted for 24 h. Cycloheximide did not inhibit TNF-alpha-mediated MUC-2 mRNA expression at 1 h, suggesting that new protein translation was not required.(ABSTRACT TRUNCATED AT 250 WORDS) FAU - Levine, S J AU - Levine SJ AD - Critical Care Medicine Department, Warren G. Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland 20892-1662. FAU - Larivee, P AU - Larivee P FAU - Logun, C AU - Logun C FAU - Angus, C W AU - Angus CW FAU - Ognibene, F P AU - Ognibene FP FAU - Shelhamer, J H AU - Shelhamer JH LA - eng PT - Journal Article PL - United States TA - Am J Respir Cell Mol Biol JT - American journal of respiratory cell and molecular biology JID - 8917225 RN - 0 (Actins) RN - 0 (DNA Primers) RN - 0 (MUC2 protein, human) RN - 0 (Mucin-2) RN - 0 (Mucins) RN - 0 (Recombinant Proteins) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM GS - MUC-2 MH - Actins/genetics MH - Base Sequence MH - Cells, Cultured MH - DNA Primers/genetics MH - Epithelium/drug effects/metabolism MH - Gene Expression/drug effects MH - Humans MH - Molecular Sequence Data MH - Mucin-2 MH - Mucins/*genetics/*metabolism MH - Organ Culture Techniques MH - Recombinant Proteins/pharmacology MH - Respiratory System/*drug effects/metabolism MH - Tumor Necrosis Factor-alpha/*pharmacology EDAT- 1995/02/01 00:00 MHDA- 1995/02/01 00:01 CRDT- 1995/02/01 00:00 PHST- 1995/02/01 00:00 [pubmed] PHST- 1995/02/01 00:01 [medline] PHST- 1995/02/01 00:00 [entrez] AID - 10.1165/ajrcmb.12.2.7865217 [doi] PST - ppublish SO - Am J Respir Cell Mol Biol. 1995 Feb;12(2):196-204. doi: 10.1165/ajrcmb.12.2.7865217.