GC gene polymorphism and unbound serum retinol-binding protein 4 are related to the risk of insulin resistance in patients with chronic hepatitis c: A prospective cross-sectional study

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GC gene polymorphism and unbound serum retinol-binding protein 4 are related to the risk of insulin resistance in patients with chronic hepatitis c: A prospective cross-sectional study

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Title: GC gene polymorphism and unbound serum retinol-binding protein 4 are related to the risk of insulin resistance in patients with chronic hepatitis c: A prospective cross-sectional study
Author: Mateos Muñoz, Beatriz; García Martín, Elena; Torrejón Rueda, María José; Devesa Medina, María José; Esguevillas Cansino, Gara; Cárdenas Fernández, María Cruz; Fernández Pérez, Cristina; Carballo Villarino, Miguel; García-Agúndez Pérez-Coca, José Augusto; Ladero Quesada, José María
Abstract: Insulin resistance (IR) is found in chronic hepatitis C (CHC) more frequently than in other chronic liver diseases. Prospective cross-sectional study to evaluate a wide multitest panel to identify factors related with IR in CHC and their possible interactions. In 76 patients with CHC we performed a series of routine laboratory analysis as well as specifically designed serum biochemical tests [retinol, retinol-binding protein 4 (RBP4), 25-OH vitamin D, Vitamin E, lipopolysaccharide-binding protein (LBP), interleukin-6 (IL-6), and cystatin C]. The single nucleotide polymorphisms rs7041 and rs4588 GC-DBP (group-specific component-Vitamin D-binding protein), rs738409 PNPLA3 (patatin-like phospholipase domain containing 3), and rs12979860 IL28B (interleukin-28 B) genes were determined. Insulin sensitivity was established with the HOMA-IR and IR was diagnosed when HOMA-IR>3. Fibrosis staging was assessed with liver biopsy or transient elastography. After backward logistic regression analysis, independent variables associated with IR were Gc1s/Gc1s DBP phenotype, that results from the homozygous carriage of the rs7041G/rs4588Chaplotype (P¼0.033); low retinol/RBP4 ratio, reflecting a greater rate of unboundRBP4 (P¼0.005); older age (P¼0.01); high serum tryglicerides (P¼0.026); and advanced (F3–F4) fibrosis stage. The AUROC provided by the multivariate model was 0.950 (95% CI¼0.906–0.993). In addition to previously known ones, the Gc1s/Gc1s phenotype variant of DBP and the unbound fraction of plasma RBP4 may be considered as factors related with the incidence, and possibly the risk, of IR in CHC patients.
URI: http://hdl.handle.net/10662/7188
Date: 2016


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