Abstract
Chemotherapy-induced myelosuppression, including thrombocytopenia, is a recurrent problem during cancer treatments that may require dose alterations or cessations that could affect the antitumor effect of the treatment. To identify genetic markers associated with treatment-induced thrombocytopenia, we whole-exome sequenced 215 non-small cell lung cancer patients homogeneously treated with gemcitabine/carboplatin. The decrease in platelets (defined as nadir/baseline) was used to assess treatment-induced thrombocytopenia. Association between germline genetic variants and thrombocytopenia was analyzed at single-nucleotide variant (SNV) (based on the optimal false discovery rate, the severity of predicted consequence, and effect), gene, and pathway levels. These analyses identified 130 SNVs/INDELs and 25 genes associated with thrombocytopenia (P-value < 0.002). Twenty-three SNVs were validated in an independent genome-wide association study (GWAS). The top associations include rs34491125 in JMJD1C (P-value = 9.07 × 10−5), the validated variants rs10491684 in DOCK8 (P-value = 1.95 × 10−4), rs6118 in SERPINA5 (P-value = 5.83 × 10−4), and rs5877 in SERPINC1 (P-value = 1.07 × 10−3), and the genes CAPZA2 (P-value = 4.03 × 10−4) and SERPINC1 (P-value = 1.55 × 10−3). The SNVs in the top-scoring pathway “Factors involved in megakaryocyte development and platelet production” (P-value = 3.34 × 10−4) were used to construct weighted genetic risk score (wGRS) and logistic regression models that predict thrombocytopenia. The wGRS predict which patients are at high or low toxicity risk levels, for CTCAE (odds ratio (OR) = 22.35, P-value = 1.55 × 10−8), and decrease (OR = 66.82, P-value = 5.92 × 10−9). The logistic regression models predict CTCAE grades 3–4 (receiver operator characteristics (ROC) area under the curve (AUC) = 0.79), and large decrease (ROC AUC = 0.86). We identified and validated genetic variations within hematopoiesis-related pathways that provide a solid foundation for future studies using genetic markers for predicting chemotherapy-induced thrombocytopenia and personalizing treatments.
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Data availability
The raw sequencing datasets generated and analyzed in this study are not publicly available because this is not permitted according to the ethical approval of the study. However, the datasets are available from the corresponding author upon reasonable request with the appropriate ethical approval.
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Acknowledgements
This work was financially supported by grants from the Swedish Cancer Society (HG), the Swedish Research Council (HG), Linköping University (HG), ALF grants Region Östergötland (HG), the Funds of Radiumhemmet (RL and LDP), Marcus Borgströms stiftelse (HG), and the Spanish Ministry of Economy and Competitiveness [SAF2015-64850-R] (CR-A). The funders had no role in study design, data collection, data analysis, decision to publish, or preparation of the manuscript. We gratefully acknowledge the Science for Life Laboratory (SciLifeLab, Stockholm, Sweden), National Genomics Infrastructure (Sweden), National Bioinformatics Infrastructure Sweden, and UPPMAX (Uppsala Multidisciplinary Center for Advanced Computational Science, Uppsala, Sweden) for providing massive parallel sequencing, computational infrastructure, and support.
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Björn, N., Sigurgeirsson, B., Svedberg, A. et al. Genes and variants in hematopoiesis-related pathways are associated with gemcitabine/carboplatin-induced thrombocytopenia. Pharmacogenomics J 20, 179–191 (2020). https://doi.org/10.1038/s41397-019-0099-8
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DOI: https://doi.org/10.1038/s41397-019-0099-8
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