Association of Single Nucleotide Polymorphisms in <i>STAT3</i>, <i>ABCB1</i>, and <i>ABCG2</i> with Stomatitis in Patients with Metastatic Renal Cell Carcinoma Treated with Sunitinib: A Retrospective Analysis in Japanese Patients

  • Watanabe Aimi
    Division of Pharmacokinetics, Kobe University Graduate School of Medicine
  • Yamamoto Kazuhiro
    Department of Pharmacy, Kobe University Hospital
  • Ioroi Takeshi
    Department of Pharmacy, Kobe University Hospital
  • Hirata Sachi
    Department of Pharmacy, Kobe University Hospital
  • Harada Kenichi
    Division of Urology, Kobe University Graduate School of Medicine
  • Miyake Hideaki
    Division of Urology, Kobe University Graduate School of Medicine
  • Fujisawa Masato
    Division of Urology, Kobe University Graduate School of Medicine
  • Nakagawa Tsutomu
    Division of Pharmacokinetics, Kobe University Graduate School of Medicine Department of Pharmacy, Kobe University Hospital
  • Yano Ikuko
    Division of Pharmacokinetics, Kobe University Graduate School of Medicine Department of Pharmacy, Kobe University Hospital
  • Hirai Midori
    Division of Pharmacokinetics, Kobe University Graduate School of Medicine Department of Pharmacy, Kobe University Hospital

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  • Association of Single Nucleotide Polymorphisms in STAT3, ABCB1, and ABCG2 with Stomatitis in Patients with Metastatic Renal Cell Carcinoma Treated with Sunitinib : A Retrospective Analysis in Japanese Patients

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Abstract

<p>Signal transducer and activator of transcription (STAT) 3 is a key factor in homeostasis of the oral mucosa by regulating the production of inflammatory cytokines. Sunitinib is a substrate of P-glycoprotein (multidrug resistance (MDR)-1/ABCB1) and breast-cancer resistance protein (BCRP/ABCG2). In this retrospective study, we evaluated the association between sunitinib-induced stomatitis and STAT3, ABCB1, and ABCG2 polymorphisms in patients with metastatic renal cell carcinoma (mRCC). Fifty-two Japanese patients with RCC treated with sunitinib were retrospectively genotyped to elucidate a potential association between STAT3, ABCB1, and ABCG2 polymorphisms and stomatitis development. Stomatitis occurred in 22 out of 52 patients. The TT+TC genotypes at STAT3 rs744166 had an odds ratio of 5.00 against CC genotype for the stomatitis development (95% confident interval, 0.97–25.8). In the Kaplan–Meier method for the cumulative incidence of stomatitis, a statistically significant difference was observed between the TT+TC and CC genotypes in STAT3 rs744166 (p=0.037). Both multiple logistic regression analysis and Cox proportional-hazards regression analysis show STAT3 rs744166 TT+TC genotypes and serum creatinine in each patient were significant independent factors for stomatitis development. In conclusion, STAT3 polymorphism may be a novel risk factor for sunitinib-induced stomatitis in patients with mRCC.</p>

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