Abstract
Purpose
N-acetyltransferase 2 is an enzyme that is involved in the detoxification of carcinogens in the human body, so any damage to this protein may lead to the emergence of several metabolic dysfunctions. This work was conducted to determine the association between NAT2 polymorphism and non-small cell lung carcinoma (NSCLC) that is increasingly reported in the Iraqi population.
Methods
PCR sequencing was conducted to assess the possible association between genetic variants and NSCLC. Several in silico tools were implemented to investigate the effect of the observed SNPs on the structure, function, and stability of the altered NAT2.
Results
Five SNPS of NAT2 (rs1208, rs1041983, rs1799929, rs1799930, and rs1801280) were identified in high frequencies in the amplified fragment. These SNPs showed variable distributions of haplotypes between cases and controls. No significant association of rs1208, rs1041983, rs1799929, and rs1799930 with NSCLC was shown in the investigated population. In contrast, rs1801280: CC genotype showed a highly significant (P = 0.009) association with the NSCLC, and individuals with this genotype had 2.19 more chances for developing NSCLC (OR 2.19; Cl95% 1.21–3.94). Association analysis of rs1801280 SNP distribution among the investigated patients showed that patients with CC genotype showed a significant (P = 0.02, OR 2.65) association with family history, which entailed a high hereditary possibility of this genotype among Iraqi patients. It was predicted that this SNP showed high damaging effects on the activity of NAT2 enzyme, with various deleterious outcomes on enzyme structure, function, and stability.
Conclusion
Data indicated that rs1801280 SNP exerted a tight association with NSCLC since individuals with CC genotype exhibited the most damaging effects on the NAT2 that may be behind the low acetylation rates of this enzyme in patients with NSCLC.
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Data availability
The data stated in this work are confidential, as stipulated by the University of Kufa Institutional Review Board. The medical record was analyzed with the permission of Merjan Cancer Center’s medical board direction. Genotyping data are available on request at the Laboratory of Biotechnology supervised by Professor Mohammed Baqur S Al-Shuhaib (Al-Qasim Green University, Iraq mohammed79@agre.uoqasim.edu.iq). All information that supports our findings are included in this article.
Code availability
All data generated or analyzed during this work are included in this published article.
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Acknowledgements
The authors would like to acknowledge all the partnerships and all patients that engaged voluntarily, and who made this study possible. The Middle-Euphrates Cancer Center (MECC), Najaf province, and Merjan Cancer Center (MCC), Babil province for granting the samples and postgraduate laboratory unit, College of Medicine, University of Kufa for providing some facilities to accompany the preliminary samples preparations.
Funding
This work was part of PhD thesis of ZKA prepared in the Higher Institute of Biotechnology of Sfax, 3000 Sfax University, Tunisia (IQ200476). The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.
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Samples collection and genotyping experiments were conducted by ZKA. DNA sequencing data, biostatistical calculations, and manuscript writing were conducted by MBSA. The study was supervised by TMA. All authors approved the final version of this work.
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Institutional Ethics Committee Involving Humans of the University of Kufa (Najaf, Iraq) ratified this study (IECIH/UOK 088/2020; CAAE 08802212). All subjects signed a written informed consent form before participation and the study was conducted in accordance with Helsinki’s Declaration.
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Lawi, Z.K., Al-Shuhaib, M.B.S. & Amara, I.B. The rs1801280 SNP is associated with non-small cell lung carcinoma by exhibiting a highly deleterious effect on N-acetyltransferase 2. J Cancer Res Clin Oncol 149, 147–157 (2023). https://doi.org/10.1007/s00432-022-04332-3
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DOI: https://doi.org/10.1007/s00432-022-04332-3