کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2007354 1066372 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Regulation of human β-defensin-2 by Mycobacterium bovis bacillus Calmette-Guérin (BCG): Involvement of PKC, JNK, and PI3K in human lung epithelial cell line (A549)
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Regulation of human β-defensin-2 by Mycobacterium bovis bacillus Calmette-Guérin (BCG): Involvement of PKC, JNK, and PI3K in human lung epithelial cell line (A549)
چکیده انگلیسی

Human β-defensin (HBD)-2 is an inducible antimicrobial peptide that plays an important role in innate immunity. Induction of this peptide by mycobacteria in epithelial cells has been reported. However, the mechanism(s) by which Mycobacterium bovis bacillus Calmette-Guérin (BCG) triggers gene transcription of HBD-2 remains poorly understood. In the present work we found that treatment of human epithelial cells with Ro32-0432 or Gö6976, two selective inhibitors of protein kinase C (PKC), significantly reduced the effect of M. bovis BCG on induced HBD-2 mRNA expression (65 and 80% inhibition by 10 μM Ro32-0432, and 1 μM Gö6976 as assessed by real-time PCR, respectively). Moreover, there was increased activation of c-Jun N-terminal kinase (JNK) and phosphatidylinositol-3-kinase (PI3K)/Akt in A549 cells infected with M. bovis BCG, and this JNK and PI3K activation was mediated through PKC. Finally, we found that M. bovis BCG-induced HBD-2 mRNA gene expression in A549 cells was dependent on JNK, and PI3K determined by real-time PCR analysis, which was attenuated by inhibitors of JNK (SP600125 and AG126), and PI3K (wortmannin and Ly294002). These studies are the first to show that M. bovis BCG-induced HBD-2 mRNA expression in A549 cells is regulated at least in part through activation of signaling proteins of PKC, JNK and PI3K.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Peptides - Volume 29, Issue 10, October 2008, Pages 1657–1663
نویسندگان
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