کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2183210 1095556 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultraviolet B induces high mobility group box 1 release from mouse peritoneal macrophages in vitro via caspase-1 mediated secretion pathway
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Ultraviolet B induces high mobility group box 1 release from mouse peritoneal macrophages in vitro via caspase-1 mediated secretion pathway
چکیده انگلیسی

High mobility group box 1 (HMGB1) protein is a unique non histone nuclear protein that acts extracellularly as a mediator of delayed inflammation. Sub lethal dose of UVB triggers the release of cytokines from macrophages (MΦs). Adding to the panoply of UVB induced cytokines; it is reported that UVB induces HMGB1 release from mouse peritoneal MΦs in time and partially dose dependent manner, independent of TNF-α. UVB also enhanced the transcription of HMGB1 gene and expression of cellular protein, which influences its subsequent release. HMGB1 is secreted by an unconventional secretion pathway of unknown mechanism. Caspase-1 has been shown to function as a general regulator of stress induced unconventional secretion for a number of cytokines. In the present study, we have observed that pharmacological inhibitors specific for caspase-1 (ZVAD and YVAD) abrogated UVB induced HMGB1 release from MΦs. This effect was most likely mediated via physical interaction between HMGB1 and active caspase-1 (p10 and p20) as demonstrated by immunoprecipitation. In addition, it was found that HMGB1 and active caspase-1 p20 release depends on UVB mediated enhancement of intracellular Ca2+. Thus our data suggests that optimal dose of UVB (50 mJ/cm2) induces HMGB1 upregulation and active release from mouse peritoneal MΦs which is mediated by caspase-1 in a Ca2+ dependent manner.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Immunobiology - Volume 218, Issue 2, February 2013, Pages 135–144
نویسندگان
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