نتایج جستجو برای: xrcc4
تعداد نتایج: 389 فیلتر نتایج به سال:
In the absence of core nonhomologous end-joining (NHEJ) factors, Ab gene class-switch recombination (CSR) uses an alternative end-joining (A-EJ) pathway to recombine switch (S) region DNA breaks. Previous reports showing decreased S-junction micro-homologies in MSH2-deficient mice and an exonuclease 1 (EXO1) role in yeast microhomology-mediated end joining suggest that mismatch repair (MMR) pro...
The efficient repair of DNA double-strand breaks (DSBs) is critical for the maintenance of genomic integrity. In mammalian cells, the nonhomologous end-joining process that represents the predominant repair pathway relies on the DNA-dependent protein kinase (DNA-PK) and the XRCC4-DNA ligase IV complex. Nonetheless, several in vitro and in vivo results indicate that mammalian cells use more than...
زمینه سرطان تیرویید تمایز یافته (DTC) شایع‌ترین بدخیمی غدد درون‌ریز بوده که شامل سرطان تیرویید فولیکولاری و پاپیلاری می‌باشد. یکی از عوامل مؤثر در ایجاد ان اثر اشعه و به‌دنبال آن شکست DNA است. از جمله مسیرهای مهم ترمیم DNA شکسته شده، مسیر NHEJ (Nonhomologus End Joining) می‌باشد که با اتصال دو انتهای غیر همولوگ، DNA شکسته شده را به هم متصل می‌کند. یکی از ژنهای مهم این مسیر، ژن XRCC4 می‌باشد و پ...
تغییر در ژن های درگیر در ترمیم dna باعث کاهش ظرفیت ترمیم dna می شود و ممکن است در ابتلاء به سرطان تاثیر داشته باشد. با فرض اینکه چند شکلی در ژنهای درگیر در ترمیم dna ممکن است یک عامل خطر برای ابتلاء به سرطان روده ی بزرگ باشد، ژن xrcc4 درگیر در مسیر non homologous end-joining repair (nejr) و ابتلاء به سرطان روده ی بزرگ مورد بررسی قرار گرفت. در این مطالعه مورد – شاهدی 200 بیمار مبتلا به سرطان رود...
CONTEXT Severe short stature can be caused by defects in numerous biological processes including defects in IGF-1 signaling, centromere function, cell cycle control, and DNA damage repair. Many syndromic causes of short stature are associated with medical comorbidities including hypogonadism and microcephaly. OBJECTIVE To identify an underlying genetic etiology in two siblings with severe sho...
Aprataxin and polynucleotide kinase (PNK) are DNA end processing factors that are recruited into the DNA single- and double-strand break repair machinery through phosphorylation-specific interactions with XRCC1 and XRCC4, respectively. These interactions are mediated through a divergent class of forkhead-associated (FHA) domain that binds to peptide sequences in XRCC1 and XRCC4 that are phospho...
XLF-Cernunnos (XLF) is a component of the DNA ligase IV-XRCC4 (LX) complex, which functions during DNA non-homologous end joining (NHEJ). Here, we use biochemical and cellular approaches to probe the impact of XLF on LX activities. We show that XLF stimulates adenylation of LX complexes de-adenylated by pyrophosphate or following LX decharging during ligation. XLF enhances LX ligation activity ...
Quantitative reverse transcription PCR (RT-PCR) has become an important tool for studying functional gene expression. However the most often used cycle threshold (CT)-based method, primarily related to the required amplification efficiency determination via serial dilution, can call into question the level of quantitative reliability and accuracy that can be achieved, in addition to the impract...
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