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The individual variance in the efficiency of repair of damage induced by genotoxic therapies may be an important factor in the assessment of eligibility for different anticancer treatments, the outcomes of various treatments and the therapy-associated complications, including acute and delayed toxicity and acquired drug resistance. The second part of this paper analyses the currently available information about the possibilities of using experimentally obtained knowledge about individual repair capacity for the purposes of personalised medicine and healthcare.

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Matrix metalloproteinases (MMPs) are a family of highly homologous extracellular Zn2+-dependent endopeptidases, also known as matrixins. MMP-2 (gelatinase A) and MMP-9 (gelatinase B) are considered to play a key role in a variety of physiological processes as well as in the development and progression of a vast majority of pathological conditions. Most of the genes encoding MMPs, including MMP-2, are highly polymorphic. One of the single nucleotide polymorphisms with functional activity in the promoter region of MMP2 is the transition MMP2 −1306C>T (rs243865). The aim of the present study was to evaluate the genotype and allele frequencies of the common promoter polymorphism −1306C>T in MMP2 in 75 individuals from central Bulgaria and to compare our results with those of other population studies. We found that 76.0% of the randomly enrolled individuals are carriers of the CC genotype, 17.3% of CT, and 6.7% of the TT genotype. The minor allele frequency (MAF) was 15.3%. Interestingly, the obtained genotype frequencies appeared to differ from those of some other Caucasian populations (USA – 55/38/7, MAF 26%; The Netherlands – 52.8/40.5/6.7, MAF 26.9%; Austria – 55.6/35.5/8.9, MAF 27.2%), but were closer to the values of the reported global genotype distribution (75.3/21.3/3.4, MAF 14%).

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