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Title: Stat3 is involved in control of MASP2 gene expression.
Authors: Unterberger, C
Hanson, S
Klingenhoff, A
Oesterle, D
Frankenberger, M
Endo, Y
Matsushita, M
Fujita, T
Schwaeble, W
Weiss, EH
Ziegler-Heitbrock, L
Stover, C
First Published: 28-Dec-2007
Citation: BIOCHEM BIOPHYS RES COMMUN, 2007, 364 (4), pp. 1022-1025
Abstract: Little is known about determinants regulating expression of Mannan-binding lectin associated serine protease-2 (MASP-2), the effector component of the lectin pathway of complement activation. Comparative bioinformatic analysis of the MASP2 promoter regions in human, mouse, and rat, revealed conservation of two putative Stat binding sites, termed StatA and StatB. Site directed mutagenesis specific for these sites was performed. Transcription activity was decreased 5-fold when StatB site was mutated in the wildtype reporter gene construct. Gel retardation and competition assays demonstrated that proteins contained in the nuclear extract prepared from HepG2 specifically bound double-stranded StatB oligonucleotides. Supershift analysis revealed Stat3 to be the major specific binding protein. We conclude that Stat3 binding is important for MASP2 promoter activity.
DOI Link: 10.1016/j.bbrc.2007.10.114
eISSN: 1090-2104
Type: Journal Article
Appears in Collections:Published Articles, Dept. of Infection, Immunity and Inflammation

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