کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5501838 | 1534942 | 2016 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Perturbation of redox balance after thioredoxin reductase deficiency interrupts autophagy-lysosomal degradation pathway and enhances cell death in nutritionally stressed SH-SY5Y cells
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کلمات کلیدی
3-MADTTNADPHGSHNACGAPDHDTNBN-acetyl-l-cysteineATGCCK-8PARPTrxTrxRAutophagosomeWST-1S.E.Msequestosome 1autolysosomeIAAPBSDMEMFBSqPCRITS3-methyl adenine - 3-متیل آدنینautophagy related - autophagy مرتبطDMSO - DMSODulbecco’s modified Eagle medium - Modified Eagle اصلاح شده DulbeccoROS - ROSSQSTM1/p62 - SQSTM1 / p62Hydrogen peroxide - آب اکسیژنهAuranofin - آرونوفینiodoacetic acid - اسید ید اسیدهای آلیinsulin-transferrin-selenium - انسولین انتقال دهنده سلنیومTem - این استBaf A1 - بافت A1bafilomycin A1 - بافیلومایسین A1Neurodegenerative disease - بیماری های نوروژنیکthioredoxin reductase - تریودوکسین ردوکتازScramble - تقلاthioredoxin - تیرودوکسینstandard error of mean - خطای استاندارد میانگینdithiothreitol - دیتیوتریتولDimethyl sulfoxide - دیمتیل سولفواکسیدfetal bovine serum - سرم جنین گاوcell counting kit-8 - شمارش سلول کیت 8LAMP - لامپLysosome - لیزوزومSerum deprivation - محرومیت سرمPhosphate-buffered saline - محلول نمک فسفات با خاصیت بافریRedox regulation - مقررات RedoxIAM - من هستمTransmission electron microscopy - میکروسکوپ الکترونی عبوریnicotinamide adenine dinucleotide phosphate - نیکوتین آمید adenine dinucleotide phosphateH2O2 - هیدروژن پراکسیدquantitative real-time polymerase chain reaction - واکنش زنجیره ای پلیمراز کمی زمان واقعی استProteasome - پروتئازومlysosomal-associated membrane protein - پروتئین غشای مرتبط با لیزوزومpoly (ADP-ribose) polymerase - پلی (ADP-ribose) پلیمرازChloroquine - کلروکین Glutathione - گلوتاتیونglyceraldehyde-3-phosphate dehydrogenase - گلیسرالیدید-3-فسفات دهیدروژنازReactive oxygen species - گونههای فعال اکسیژنubiquitination - یوبی کوئیتینه شدن iodoacetamide - یووداکتامیدSCR - یکسوساز کنترلشده با سیلیکون
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
سالمندی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Oxidative damage and aggregation of cellular proteins is a hallmark of neuronal cell death after neurotrauma and chronic neurodegenerative conditions. Autophagy and ubiquitin protease system are involved in degradation of protein aggregates, and interruption of their function is linked to apoptotic cell death in these diseases. Oxidative modification of cysteine groups in key molecular proteins has been linked to modification of cellular systems and cell death in these conditions. Glutathione and thioredoxin systems provide reducing protons that can effectively reverse protein modifications and promote cell survival. The central role of Thioredoxin in inhibition of apoptosis is well identified. Additionally, its involvement in initiation of autophagy has been suggested recently. We therefore aimed to investigate the involvement of Thioredoxin system in autophagy-apoptosis processes. A model of serum deprivation in SH-SY5Y was used that is associated with autophagy and apoptosis. Using pharmacological and RNA-editing technology we show that Thioredoxin reductase deficiency in this model enhances oxidative stress and interrupts the early protective autophagy and promotes apoptosis. This was associated with decreased protein-degradation in lysosomes due to altered lysosomal acidification and accumulation of autophagosomes as well as impairment in proteasome pathway. We further confirmed that the extent of oxidative stress is a determining factor in autophagy- apoptosis interplay, as upregulation of cellular reducing capacity by N-acetylcysteine prevented impairment in autophagy and proteasome systems thus promoted cell viability. Our study provides evidence that excessive oxidative stress inhibits protein degradation systems and affects the final stages of autophagy by inhibiting autolysosome maturation: a novel mechanistic link between protein aggregation and conversion of autophagy to apoptosis that can be applicable to neurodegenerative diseases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Free Radical Biology and Medicine - Volume 101, December 2016, Pages 53-70
Journal: Free Radical Biology and Medicine - Volume 101, December 2016, Pages 53-70
نویسندگان
Pandian Nagakannan, Mohamed Ariff Iqbal, Albert Yeung, James A. Thliveris, Mojgan Rastegar, Saeid Ghavami, Eftekhar Eftekharpour,