Ototoxicity and nephrotoxicity are dose-limiting side effects of cisplatin. Megalin, a member of the low-density lipoprotein receptor family, is highly expressed in renal proximal tubular cells and marginal cells of the stria vascularis of the inner ear - tissues, which accumulate high levels of platinum-DNA adducts. On the assumption that the mechanisms of cisplatin-induced nephro- and ototoxicity involve megalin we analyzed the incidence of the non-synonymous single nucleotide polymorphisms (SNP) rs2075252 and rs4668123 in 25 patients who developed a distinct hearing loss during cisplatin therapy and in 25 patients without hearing impairment after cisplatin therapy. We found no association between cisplatin-induced ototoxicity and any allele of rs4668123 but observed a higher frequency of the A-allele of rs2075252 in the group with hearing impairment than in the group with normal hearing after cisplatin therapy (0.32 versus 0.14) (χ2 =5.83, P<0.02; odds ratio: 3.45; 95% confidence interval: 1.11-11.2) indicating that SNPs at the megalin gene might impact the individual susceptibility against cisplatin-induced ototoxicity.
CITATION STYLE
Riedemann, L., Lanvers, C., Deuster, D., Peters, U., Boos, J., Jürgens, H., & am Zehnhoff-Dinnesen, A. (2008). Megalin genetic polymorphisms and individual sensitivity to the ototoxic effect of cisplatin. Pharmacogenomics Journal, 8(1), 23–28. https://doi.org/10.1038/sj.tpj.6500455
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