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Umamaheswaran G, Kadambari D, Muthuvel SK, Kalaivani S, Devi J, Damodaran SE, Pradhan SC, Dubashi B, Dkhar SA, Adithan C. Association of CYP19A1 gene variations with adjuvant letrozole-induced adverse events in South Indian postmenopausal breast cancer cohort expressing hormone-receptor positivity. Breast Cancer Res Treat 2020; 182:147-158. [PMID: 32385792 DOI: 10.1007/s10549-020-05656-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/27/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE Musculoskeletal adverse events (MS-AEs) and vasomotor symptoms (VMSs) are the major side-effects of newer generation non-steroidal aromatase inhibitor (AI), letrozole. Single-nucleotide polymorphisms (SNPs) in CYP19A1 gene coding for the enzyme aromatase are related to AI treatment-associated adverse drug reactions. Therefore, we aimed to determine whether SNPs in the CYP19A1 gene are associated with adjuvant letrozole-induced 'specific' AEs in postmenopausal hormone receptor-positive (HR+) breast cancer patients. METHODS Genomic DNA was isolated from 198 HR+ breast cancer patients by the phenol-chloroform method, and eleven SNPs in the CYP19A1 gene were genotyped by TaqMan genotyping assays on the qRT-PCR system. Toxicity was assessed according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 3.0, and the data were analyzed using SPSS v19.0 and Haploview v4.2 statistical software. RESULTS Subjects carrying the genetic variants of CYP19A1 gene SNP rs700519 had significantly higher odds (OR 2.33; 95% CI [1.29-4.20], P = 0.0057) of MS-AEs under dominant statistical effect. The frequency of the two distinct haplotypes that include the variant allele 'T' at rs700519 locus, H5-GCTATCTGGCG (P = 0.042) and H11-GCTATTGCACG (P = 0.013) were significantly higher in patients with musculoskeletal toxicity than in those without MS-AEs and thus predisposing to MS-AEs. Similarly, H6-GCCAGCTGGCG (P = 0.037) haplotype exhibited higher frequencies in patients presented with VMSs. However, no such association was observed between CYP19A1 genotypes and VMSs. CONCLUSIONS To the best of our knowledge, this is the first study assessing the impact of CYP19A1 genetic variations with adjuvant letrozole treatment-associated AEs in Indian women. Genetic variations in the CYP19A1 gene is associated with letrozole-induced AEs and warrants further investigation in larger cohorts to validate this finding.
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Affiliation(s)
- Gurusamy Umamaheswaran
- Department of Pharmacology, Centre for Advanced Research in Pharmacogenomics, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India. .,Department of Oncology, Institute of Clinical and Experimental Medicine, Linkoping University, Linkoping, Sweden.
| | - Dharanipragada Kadambari
- Departments of Surgery and Medical Education, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
| | - Suresh Kumar Muthuvel
- School of Life Sciences, Centre for Bioinformatics, Pondicherry University, Puducherry, India
| | - Sekar Kalaivani
- Department of Pharmacology, Centre for Advanced Research in Pharmacogenomics, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
| | - Jaganathan Devi
- Department of Animal Sciences, University of Connecticut, Storrs, USA
| | - Solai Elango Damodaran
- Department of Pharmacology, Centre for Advanced Research in Pharmacogenomics, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
| | - Suresh Chandra Pradhan
- Department of Pharmacology, Centre for Advanced Research in Pharmacogenomics, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
| | - Biswajit Dubashi
- Department of Medical Oncology, Regional Cancer Center, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
| | - Steven Aibor Dkhar
- Department of Pharmacology, Centre for Advanced Research in Pharmacogenomics, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India.,Department of Clinical Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
| | - Chandrasekaran Adithan
- Department of Pharmacology, Centre for Advanced Research in Pharmacogenomics, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India.,Central Inter-Disciplinary Research Facility, Mahatma Gandhi Medical College & Research Institute, Puducherry, India
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