کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5561778 | 1562290 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simplified qPCR method for detecting excessive mtDNA damage induced by exogenous factors
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کلمات کلیدی
HspFPG8-oxoG8-oxo-7,8-dihydro-2′-deoxyguanosine - 8-اکسو-7،8-دی هیدرو-2'-دگزسی گوانوزینMitochondrial DNA - DNA میتوکندریاTAS - IASHydrogen peroxide - آب اکسیژنهOxidative damage - آسیب اکسیداتیوmtDNA - دیانای میتوکندریاییRotenone - روتنونformamidopyrimidine DNA glycosylase - فرمامیدوپیریمیدین دی ان ای گلیکوزیلازorigin of replication - منشا تکثیر
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
بهداشت، سم شناسی و جهش زایی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Damage to mitochondrial DNA (mtDNA) is a meaningful biomarker for evaluating genotoxicity of drugs and environmental toxins. Existing PCR methods utilize long mtDNA fragments (â¼8-10Â kb), which complicates detecting exact sites of mtDNA damage. To identify the mtDNA regions most susceptible to damage, we have developed and validated a set of primers to amplify â¼2Â kb long fragments, while covering over 95% of mouse mtDNA. We have modified the detection method by greatly increasing the enrichment of mtDNA, which allows us solving the problem of non-specific primer annealing to nuclear DNA. To validate our approach, we have determined the most damage-susceptible mtDNA regions in mice treated in vivo and in vitro with rotenone and H2O2. The GTGR-sequence-enriched mtDNA segments located in the D-loop region were found to be especially susceptible to damage. Further, we demonstrate that H2O2-induced mtDNA damage facilitates the relaxation of mtDNA supercoiled conformation, making the sequences with minimal damage more accessible to DNA polymerase, which, in turn, results in a decrease in threshold cycle value. Overall, our modified PCR method is simpler and more selective to the specific sites of damage in mtDNA.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Toxicology - Volume 382, 1 May 2017, Pages 67-74
Journal: Toxicology - Volume 382, 1 May 2017, Pages 67-74
نویسندگان
Artem P. Gureev, Ekaterina A. Shaforostova, Anatoly A. Starkov, Vasily N. Popov,