نتایج جستجو برای: mirna 7
تعداد نتایج: 663954 فیلتر نتایج به سال:
BACKGROUND Multidrug resistance (MDR) directly contributes to the clinical failure of chemotherapy in breast cancer (BCA). β-elemene is a natural antitumor drug from plants. We previously confirmed that MDR could be reversed by β-elemene. In this study, we intended to investigate the reversal effect of β-elemene on MDR in human BCA adriacin (Adr) -resistant MCF-7 cells (MCF-7/Adr) and docetaxel...
In the nematode Caenorhabditis elegans, microRNA (miRNA) regulation of development was first observed in the striking abnormalities of lin-4 and let-7 loss of function mutants. However, after these first two miRNA mutant phenotypes were described, progress on the identification of miRNA functions in worms slowed considerably. Recent advances reveal new functions for miRNAs in embryonic and larv...
Myotonic dystrophy type 1 (DM1) is caused by the expansion of CTG repeats in the 3' untranslated region of the DMPK gene. Several missplicing events and transcriptional alterations have been described in DM1 patients. A large number of these defects have been reproduced in animal models expressing CTG repeats alone. Recent studies have also reported miRNA dysregulation in DM1 patients. In this ...
This study aimed to investigate the miRNA expression patterns in granulosa cells of subordinate (SF) and dominant follicle (DF) during the early luteal phase of the bovine estrous cycle. For this, miRNA enriched total RNA isolated from granulosa cells of SF and DF obtained from heifers slaughtered at day 3 and day 7 of the estrous cycle was used for miRNAs deep sequencing. The results revealed ...
In animals, the double-stranded RNA-specific endonuclease Dicer produces two classes of functionally distinct, tiny RNAs: microRNAs (miRNAs) and small interfering RNAs (siRNAs). miRNAs regulate mRNA translation, whereas siRNAs direct RNA destruction via the RNA interference (RNAi) pathway. Here we show that, in human cell extracts, the miRNA let-7 naturally enters the RNAi pathway, which sugges...
سرطان معده یکی از مهم ترین انواع سرطان ها و دومین سرطان کشنده پس از سرطان ریه به خصوص در کشورهای آسیای شرقی است. بروز سرطان معده حاصل برهم کنش فاکتورهای محیطی ( وفاکتورهای ژنتیکی است . آلودگی با هلیکوباکترپیلوری به عنوان یک عامل اصلی در نموسرطان شناخته شده است. البته فقط تعداد کمی از افراد مبتلا به این عفونت به سرطان معده مبتلا می شوند و بر این اساس حدس می زنند که فاکتورهای ژنتیکی خود فرد نیز د...
We predict regulatory targets of vertebrate microRNAs (miRNAs) by identifying mRNAs with conserved complementarity to the seed (nucleotides 2-7) of the miRNA. An overrepresentation of conserved adenosines flanking the seed complementary sites in mRNAs indicates that primary sequence determinants can supplement base pairing to specify miRNA target recognition. In a four-genome analysis of 3' UTR...
“Microinjected, singly-fluorophore labeled, functional miRNAs were tracked within diffusing particles, a majority of which contained single such miRNA molecules.” Page 8: “...While close to 50% of all particles contained single fluorophore labeled miRNAs 2 h after microinjection, a significant fraction held up to seven labeled miRNAs.” As for the suggested controls: 1) We know that these experi...
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