Person: KARAALP, ATİLA
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KARAALP
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ATİLA
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Publication Open Access Association of PD-1 and PDL-1 gene polymorphisms with colorectal cancer risk and prognosis(2022-03-01) KARAALP, ATİLA; SÜSLEYİCİ, BELGİN; Cevik M., Namal E., Iner-Koksal U., Dinc-Sener N., KARAALP A., Ciftci C., SÜSLEYİCİ B.Background Programmed Cell Death-1 (PD-1) together with Programmed Death Ligand 1 (PDL-1) have crucial roles in anti-tumor immune response, cancer susceptibility and prognosis. Since PD-1 and PDL-1 have been considered as important genetic risk factors in cancer development and their functions can be affected by polymorphic sites, we investigated the effects of PD-1 rs2227981, rs2227982, rs36084323 and PDL-1 rs2282055, rs822336 gene polymorphisms on colorectal cancer (CRC) risk and prognosis in Turkish subjects. Methods and results Our study group consisted of 5-FU or Capacitabine prescribed CRC diagnosed patients and healthy controls. Genotype analyses of PD1 and PDL-1 polymorphisms were performed with Agena MassARRAY platform. rs36084323 CT genotype frequency was found to be higher in controls compared to cases (p C polymorphism might be useful in predicting CRC prognosis. PDL-1 rs2282055 T > G polymorphism might be useful in predicting both CRC risk and prognosis. Further studies should be conducted in larger and different populations to clear the roles of PD-1 and PDL-1 polymorphisms in CRC risk and prognosis.Publication Metadata only Association of PD-1 and PDL-1 gene polymorphisms with colorectal cancer risk and prognosis(SPRINGER, 2022) KARAALP, ATİLA; Cevik, Mehtap; Namal, Esat; Iner-Koksal, Ulkuhan; Dinc-Sener, Nur; Karaalp, Atila; Ciftci, Cavlan; Susleyici, BelginBackground Programmed Cell Death-1 (PD-1) together with Programmed Death Ligand 1 (PDL-1) have crucial roles in anti-tumor immune response, cancer susceptibility and prognosis. Since PD-1 and PDL-1 have been considered as important genetic risk factors in cancer development and their functions can be affected by polymorphic sites, we investigated the effects of PD-1 rs2227981, rs2227982, rs36084323 and PDL-1 rs2282055, rs822336 gene polymorphisms on colorectal cancer (CRC) risk and prognosis in Turkish subjects. Methods and results Our study group consisted of 5-FU or Capacitabine prescribed CRC diagnosed patients and healthy controls. Genotype analyses of PD1 and PDL-1 polymorphisms were performed with Agena MassARRAY platform. rs36084323 CT genotype frequency was found to be higher in controls compared to cases (p < 0.001). rs36084323 CT genotype was highly associated with reduced CRC risk compared to CC genotype (OR 0.068, 95% CI 0.022-0.211, p < 0.001). In adjusted analysis, rs2282055 GG genotype was found to be associated with reduced CRC risk (OR 0.271, 95% CI 0.078-0.940, p = 0.040). rs2282055 TT genotype was found to be related to longer progression-free (Bonferroni corrected Log rank p = 0.013) and overall survival (Bonferroni corrected Log rank p = 0.009) to that of GG genotypes. Patients with rs822336 GC+CC genotypes showed longer overall survival times compared to GG (Log rank p = 0.044). Conclusions According to our results, PD-1 rs822336 G > C polymorphism might be useful in predicting CRC prognosis. PDL-1 rs2282055 T > G polymorphism might be useful in predicting both CRC risk and prognosis. Further studies should be conducted in larger and different populations to clear the roles of PD-1 and PDL-1 polymorphisms in CRC risk and prognosis.Publication Metadata only Warfarin pharmacogenetics in patients with heart valve replacement(ELSEVIER, 2020) KARAALP, ATİLA; Bezci, Kivanc; Cevik, Mehtap; Akdeniz, Cansu Selcan; Canbolat, Ismail Polat; Yurdakul, Selen; Sunbul, Murat; Atas, Halil; Cagatay, Penbe; Ciftci, Cavlan; Karaalp, Atila; Susleyici, BelginBackground: Warfarin treatment is crucial to prevent thrombolytic complications after the heart valve replacement (HVR) operation. Our purpose was to investigate the prevalence of CYP2C9 *2 and *3 gene polymorphisms, which are essential in warfarin metabolism in patients with and without HVR surgery prescribed with warfarin. Material and method: 47 patients with and without HVR were genotyped for the CYP2C9*2 (rs1799853, 430 C> T), CYP2C9*3 (rs1057910, 1075 A> C) polymorphisms by PCR-RFLP assay. Results: Homozygous wild (CC), heterozygous and homozygous polymorphic (CT+TT) genotype frequencies of CYP2C9 *2 were determined respectively as 69.6% and 30.4% for patients with HVR; 79.2% and 20.8% for patients without HVR. Homozygous wild (AA) and heterozygous (AC) genotype frequencies of CYP2C9 *3 polymorphism were determined respectively as 73.9% and 26.1%f for patients with HVR; 79.2% and 20.8% for patients without HVR. CYP2C9 *2 and *3 genotype frequencies did not show any statistically significant difference between with and without HVR groups. Conclusion: In the present study, no significant difference was observed between patients with and without HVR with respect to CYP 2C9 *2 and *3 gene polymorphisms in Turkish subjects. Further studies with higher number of patients are needed to evaluate the importance of CYP 2C9 *2 and *3 pharmacogenetic testing in patients with HVR using warfarin.Publication Metadata only The effects of CYP2C9 and VKORC1 gene polymorphisms on warfarin maintenance dose in Turkish cardiac patients(FUTURE MEDICINE LTD, 2020) KARAALP, ATİLA; Akdeniz, Cansu Selcan; Cevik, Mehtap; Canbolat, Ismail Polat; Yurdakul, Selen; Cagatay, Penbe; Ciftci, Cavlan; Karaalp, Atila; Susleyici, BelginAim: Our aim was to examine the effect of CYP2C9 and VKORC1 polymorphisms on warfarin dose requirements in Turkish patients. Materials & methods: 24 warfarin prescribed patients were included and analyzed for eight VKORC1 and 6 CYP2C9 polymorphisms in the study. Results: Patients with CYP2C9 *1/*1 and VKORC1 -1639 GG and GA genotypes required higher warfarin doses in comparison to wild type VKORC1 genotype. Patients with CYP2C9 *1/*3 and VKORC1 -1639 GG genotypes simultaneously, required the lowest dose of warfarin (4.64 mg/day). Patients with CYP2C9 *1/*1 and VKORC1 9041 AA genotype were found to require higher warfarin doses. Conclusion: Our results provide additional evidence to support the hypothesis that CYP2C9 *2, *3, VKORC1 9041 G > A polymorphisms explain considerable proportion of inter-individual variability in warfarin dose requirement.