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Abstract

Association of drug transporter gene ABCB1 (MDR1) 3435C to T polymorphism with colchicine response in familial Mediterranean fever.

Abdurrahman Tufan, Melih O Babaoglu, Ali Akdogan, Umit Yasar, Meral Calguneri, Umut Kalyoncu, Omer Karadag, Mutlu Hayran, A Ihsan Ertenli, Atila Bozkurt and Sedat Kiraz
The Journal of Rheumatology July 2007, 34 (7) 1540-1544;
Abdurrahman Tufan
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Melih O Babaoglu
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Ali Akdogan
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Umit Yasar
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Meral Calguneri
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Umut Kalyoncu
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Omer Karadag
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Mutlu Hayran
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A Ihsan Ertenli
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Atila Bozkurt
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Sedat Kiraz
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Abstract

OBJECTIVE: Colchicine is a mainstay of treatment in familial Mediterranean fever (FMF); however, 5%-10% of patients do not respond to colchicine. Adenosine triphosphate-binding cassette subfamily B member 1 (ABCB1 or MDR1) is a drug transporter that extrudes colchicine out of cells. ABCB1 gene 3435C to T polymorphism has been demonstrated to alter MDR1 expression in mononuclear cells. Thus, the amount of MDR1 in mononuclear cells may alter response to colchicine. We investigated the association between MDR1 3435C to T polymorphism and colchicine response in patients with FMF. METHODS: Patients (n = 120) were examined for colchicine responses. ABCB1 gene 3435C to T genotypes were determined to analyze associations with colchicine resistance. RESULTS: Ninety-eight patients were evaluated as responders and 22 as nonresponders. The distributions of ABCB1 CC, CT, and TT genotypes were significantly different between responsive and nonresponsive groups (chi-square = 6.86, p = 0.032). Colchicine resistance was significantly higher in patients harboring the C allele than in patients with TT genotype (odds ratio 9.71, 95% CI 1.58-58.76). Similarly, the mean colchicine dose to prevent remission was significantly lower in the TT group compared with subjects with the C allele (p = 0.014). CONCLUSION: Our study revealed an association between 3435C to T polymorphism and colchicine response in patients with FMF. Patients with the TT genotype for the ABCB1 3435C to T variant responded better to colchicine in terms of treatment efficacy and colchicine dose requirements.

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The Journal of Rheumatology
Vol. 34, Issue 7
1 Jul 2007
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Association of drug transporter gene ABCB1 (MDR1) 3435C to T polymorphism with colchicine response in familial Mediterranean fever.
Abdurrahman Tufan, Melih O Babaoglu, Ali Akdogan, Umit Yasar, Meral Calguneri, Umut Kalyoncu, Omer Karadag, Mutlu Hayran, A Ihsan Ertenli, Atila Bozkurt, Sedat Kiraz
The Journal of Rheumatology Jul 2007, 34 (7) 1540-1544;

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Association of drug transporter gene ABCB1 (MDR1) 3435C to T polymorphism with colchicine response in familial Mediterranean fever.
Abdurrahman Tufan, Melih O Babaoglu, Ali Akdogan, Umit Yasar, Meral Calguneri, Umut Kalyoncu, Omer Karadag, Mutlu Hayran, A Ihsan Ertenli, Atila Bozkurt, Sedat Kiraz
The Journal of Rheumatology Jul 2007, 34 (7) 1540-1544;
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