نتایج جستجو برای: آسیب rna

تعداد نتایج: 274796  

Journal: :مجله علوم اعصاب شفای خاتم 0
parastoo barati dowom shefa neuroscience research center, khatam alanbia hospital, tehran, iran marzieh darvishi a. shefa neuroscience research center, khatam alanbia hospital, tehran, iran b. department of anatomy, faculty of medicine, ilam university of medical sciences, ilam, iran

noncoding ribonucleic acids micro-rna is involved in the regulation of gene expression have major roles in the post-transcriptional level. a micro-rna alone several causes down regulation of mrna transcript of the target. thus, small changes in the expression of a micro rna may lead to significant changes in gene expression are different. micro- rna as key regulators of immune cell lineage diff...

Journal: :iranian journal of parasitology 0
b kazemi department of biotechnology, school of medicine, shahid beheshti university of medical sciences, tehran, iran and cellular and molecular biology research center, shahid beheshti university of medical sciences, tehran, iran

leishmania is a protozoan parasite belonging to the family trypanosomatidae, which is found among 88 different countries. the parasite lives as an amastigote in vertebrate macro­phages and as a promastigote in the digestive tract of sand fly. it can be cultured in the laboratory us­ing appropriate culture media. although the sexual cycle of leishmania has not been observed during the promastigo...

RNA processing is essential factor for synthesis of functional and structural proteins in eukaryote cells. In eukaryote organisms it will be initiated with transcription of DNA in nucleolus and terminated to mRNA translation in cytoplasm, finally mRNA degraded. Protein synthesis followed as different steps, includes 5' capping, poly adenylating, processing and transferring from nucleolus to cyt...

Isolation of high-quality RNA is one of the most crucial methods in molecular biology. RNA extraction from woody plants has been problematic due to the presence of rigid and woody tissues, large amounts of polysaccharides, polyphenols and other secondary metabolites. Here we present a suitable protocol for RNA isolation from a wide range of woody plants that includes eight gymnosperms and four ...

M. Pahlevan Kakhki

RNA extraction is a prerequisite technique for gene expression studies, analyzing the etiology and disease progression, treatment effects, as well as designing the diagnostic methods. Although many RNA extraction kits have been commercialized, but these kits are expensive and are not accessible in some countries. Many studies have shown that TRIzol is an applicable material for the RNA extracti...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده علوم طبیعی 1393

چکیده: سرطان معده یکی از علل مرگ ومیر در جهان و به خصوص در کشورهای آسیایی می باشد. میکرو rna ها،rna های کوچک غیر کد کننده به طول 20-24 نوکلئوتید هستند که در تنظیم بیان ژن بعد از رونویسی نقش دارند. میکرو rna ها قادر به اتصال به ناحیه ترجمه نشدنی 3 ژن هدف هستند. این اتصال سبب تخریب mrna یا مهار ترجمه می شود. میکرو rna های بسیاری تاکنون در سلول های انسانی شناسایی شده است که در مراحل مختلف رشد و نم...

RNA processing is essential factor for synthesis of functional and structural proteins in eukaryote cells. In eukaryote organisms it will be initiated with transcription of DNA in nucleolus and terminated to mRNA translation in cytoplasm, finally mRNA degraded. Protein synthesis followed as different steps, includes 5' capping, poly adenylating, processing and transferring from nucleolus to cyt...

Journal: :iranian journal of medical sciences 0
sanaz dastgheib department of biochemistry, school of medicine, shiraz university of medical sciences, shiraz, iran; and student research committee, school of medicine, shiraz university of medical sciences, shiraz, iran cambyz irajie department of resource development and management, shiraz university of medical sciences, shiraz, iran raheleh assaei endocrinology and metabolism research center, nemazee hospital, shiraz university of medical sciences, shiraz, iran farhad koohpeima endocrinology and metabolism research center, nemazee hospital, shiraz university of medical sciences, shiraz, iran pooneh mokarram department of biochemistry, school of medicine, shiraz university of medical sciences, shiraz, iran; and gasteroenterohepatology research center, nemazee hospital, school of medicine, shiraz university of medical sciences, shiraz, iran;and faculty for advanced biomedical sciences, school of medicine, shiraz university of medical sciences, shiraz, iran

background: optimized rna extraction from tissues and cell lines consists of four main stages regardless of the method of extraction: 1) homogenizing, 2) effective denaturation of proteins from rna, 3) inactivation of ribonuclease, and 4) removal of any dna, protein, and carbohydrate contamination. isolation of undamaged intact rna is challenging when the related tissue contains high levels of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پزشکی 1394

لنفوم منتشره سلول های بزرگ (dlbl)b، بیشترین شیوع را در بین لنفوم غیر هوجکینی دارد. بدنبال رنگ آمیزی هماتوکسیلین وائوزین، تکنیک ایمونوهیستوشیمی (ihc) اولین روش در طبقه بندی کردن آن است.میکرو rna که توسط پلی مراز ii در هسته رونویسی می شوند پس از طی روند تغییرات از هسته وارد سیتوپلاسم شده و اندازه بالغ آنها حدود 25-18 اسید نوکلوئیک می باشد. فرم بالغ آنها در آنزیم risc قرار گرفته که می تواند به m.r...

تکیان, امیرحسین, دوستی, محمود ,

Within the past few years, neat scheme has been overturned by the discovery that RNA can act as an enzyme. What does the starting finding of RNA enzymes imply? Thre first implication is that one can no longer assume a protein lies behind every catalytic activity of the cell. It now appears that several of the operations that tailor an RAN molecule into its final form are at least in part cataly...

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