کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5823929 | 1118374 | 2012 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
p38MAPK and ERK1/2 dictate cell death/survival response to different pro-oxidant stimuli via p53 and Nrf2 in neuroblastoma cells SH-SY5Y
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کلمات کلیدی
BSOGSSGAMSHO-1DNPPARPGPXNACGSHNrf2Heme oxygenase-1c-Jun-NH2-terminal kinasep53JnkGI-GPx2,4-dinitrophenylhydrazine - 2،4-dinitrophenylhydrazinekeap1 - buy1Dimethylthiourea - dimethylthioureaDMSO - DMSODMTU - DMTERK1/2 - ERK1 / 2MAPK - MAPKp62/SQSTM1 - P62 / SQSTM1ROS - ROSTrx1 - TRX1buthionine sulfoximine - بوته یون سولفسیمیمOxidative stress - تنش اکسیداتیوThioredoxin 1 - تیورودکسین 1Diamide - دیامیدDimethyl sulfoxide - دیمتیل سولفواکسیدantioxidant response elements - عناصر پاسخ آنتی اکسیدانARE - هستندKelch-like ECH-associated protein 1 - پروتئین مرتبط با ECH کلچ 1mitogen activated protein kinase - پروتئین کیناز فعال Mitogen فعال استpolyADP-ribose polymerase - پلیآپ-ریبوز پلی مرازreduced glutathione - کاهش گلوتاتیونGlutathione - گلوتاتیونglutathione disulfide - گلوتاتیون دی سولفیدglutathione peroxidase - گلوتاتیون پراکسیدازReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم پزشکی و سلامت
داروسازی، سم شناسی و علوم دارویی
داروشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Redox changes are often reported as causative of neoplastic transformation and chemoresistance, but are also exploited as clinical tools to selectively kill tumor cells. We previously demonstrated that gastrointestinal-derived tumor histotypes are resistant to ROS-based treatments by means of the redox activation of Nrf2, but highly sensitive to disulfide stressors triggering apoptosis via the redox induction of Trx1/p38MAPK/p53 signaling pathway.Here, we provide evidence that neuroblastoma SH-SY5Y has a complete opposite behavior, being sensitive to H2O2, but resistant to the glutathione (GSH)-oxidizing molecule diamide. Consistent with these observations, the apoptotic pathway activated upon H2O2 treatment relies upon Trx1 oxidation, and is mediated by the p38MAPK/p53 signaling axis. Pre-treatment with different antioxidants, pharmacological inhibitor of p38MAPK, or small interfering RNA against p53 rescue cell viability. On the contrary, cell survival to diamide relies upon redox activation of Nrf2, in a way independent on Keap1 oxidation, but responsive to ERK1/2 activation. Chemical inhibition of GSH neo-synthesis or ERK1/2 phosphorylation, as well as overexpression of the dominant-negative form of Nrf2 sensitizes cells to diamide toxicity. In the searching for the molecular determinant(s) unifying these phenomena, we found that SH-SY5Y cells show high GSH levels, but exhibit very low GPx activity. This feature allows to efficiently buffer disulfide stress, but leaves them being vulnerable to H2O2-mediated insult. The increase of GPx activity by means of selenium supplementation or GPx1 ectopic expression completely reverses death phenotype, indicating that the response of tumor cells to diverse oxidative stimuli deeply involves the entire GSH redox system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Pharmacology - Volume 83, Issue 10, 15 May 2012, Pages 1349-1357
Journal: Biochemical Pharmacology - Volume 83, Issue 10, 15 May 2012, Pages 1349-1357
نویسندگان
Giuseppe Filomeni, Sara Piccirillo, Giuseppe Rotilio, Maria R. Ciriolo,