Kantitatif RT-PCR (RT-qPCR) Çalışmalarında Uygun Housekeeping Genlerin (HKGs) Seçimi ve Validasyonu

Abstract

Gen ekspresyon çalışmalarında farklı deneysel veya klinik koşullar altında genlerin ekspresyon seviyelerinin karşılaştırılması için kullanılan en yaygın teknik Kantitatif Gerçek Zamanlı Polimeraz Zincir Reaksiyonu (RT-qPCR)’dur. RT-qPCR’da güvenilir sonuçlar elde etmek için verilerin housekeeping genler (HKG) ile normalizasyonunun yapılması gerekmektedir. Bununla birlikte; çalışma tasarımına uygun en stabil HKG’nin kullanılması, çalışma sonuçlarının güvenilirliğini artırmaktadır. Güvenilir veri elde etmek için çalışma tasarımına uygun stabil HKG’nin seçimi ve validasyonu önemli bir adımdır ki bu ekspresyon bazlı çalışmalarda bütünleyici bir adım olmuştur. HKG seçimi için farklı yazılım programları geliştirilmiştir. Normalizasyon için seçilecek en stabil HKG’nin seçilmeden önce deneysel çalışmalar ile dikkatli bir şekilde değerlendirmesinin yapılması gerekmektedir. Bu derlemede; Kantitatif Gerçek Zamanlı PCR Deneylerinin Yayınlanması için Asgari Bilgi (MIQE), HKG’lerin genel özellikleri, RT-qPCR çalışmalarında kullanımları ile çalışma dizaynına göre en uygun ve stabil olan HKG’lerin seçimi ve validasyonu hakkında bilgiler özetlenmiştir.

Keywords

• Gen ekspresyonu,housekeeping gen,kantitatif RT-PCR,referans gen

Selection and Validation of Suitable Housekeeping Genes (HKGs) in Quantitative RT-PCR (RT-qPCR) Studies

Abstract

The quantitative Real-time Polymerase Chain Reaction (RT-qPCR) is the most common technique used to compare the expression levels of genes under different experimental or clinical conditions. Data should be normalized with housekeeping genes (HKGs) to obtain reliable results in RT-qPCR. Likewise, the use the most stable and suitable HKG for the study design improves the reliability of the study results. The selection and validation of a stable HKG according to the study design to obtain reliable data is an essential and integral step in expression-based studies. The several software programs have been developed for HKG selection. The most stable HKG to be selected for normalization needs to be carefully evaluated by experimental studies before selection. In this review, summarized Minimum Information for Publication of Quantitative Real-Time PCR Experiments (MIQE), characteristics of HKGs, selection and validation of most suitable and stable HKGs according to study design and, usage in RT-qPCR.

Keywords

• Gene expression,housekeeping gene,quantitative RT-PCR,reference gene

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