Zhibin Li1, Mingzhu Lin2, Changqin Liu3, Dongmei Wang4, Xiulin Shi2, Zheng Chen2, Yongwen Liu2, Shuyu Yang5, Xuejun Li6. 1. Xiamen Diabetes Institute, The First Affiliated Hospital, Xiamen University, Xiamen, China; Epidemiology Research Unit, The First Affiliated Hospital, Xiamen University, Xiamen, China. 2. Department of Endocrinology and Diabetes, The First Affiliated Hospital, Xiamen University, Xiamen, China. 3. Department of Endocrinology and Diabetes, The First Affiliated Hospital, Xiamen University, Xiamen, China; Department of Endocrinology and Diabetes, The Teaching Hospital of Fujian Medical University, Xiamen, China. 4. School of Medicine, Xiamen University, Xiamen, China. 5. Xiamen Diabetes Institute, The First Affiliated Hospital, Xiamen University, Xiamen, China; Department of Endocrinology and Diabetes, The First Affiliated Hospital, Xiamen University, Xiamen, China. Electronic address: xmyangshuyu@126.com. 6. Xiamen Diabetes Institute, The First Affiliated Hospital, Xiamen University, Xiamen, China; Department of Endocrinology and Diabetes, The First Affiliated Hospital, Xiamen University, Xiamen, China. Electronic address: xmlixuejun@163.com.
Abstract
OBJECTIVE: Laboratory models suggested that Fetuin-B impaired insulin action in myotubes and hepatocytes and caused glucose intolerance in mice. We aimed to explore the independent associations and pathways among serum Fetuin-B, nonalcoholic fatty liver disease (NAFLD) and type 2 diabetes (T2D). METHODS: A cross-sectional study of 1318 obese adults who underwent serum Fetuin-B test and hepatic ultrasonography scanning was conducted in Xiamen, China. Multivariable logistic regression was used to calculate adjusted odds ratio (OR) and 95% confidence intervals (CI) of serum Fetuin-B level and NAFLD for T2D in different models with adjustment for potential confounders. Structural equation modeling (SEM) was used to examine the paths among NAFLD, serum Fetuin-B, metabolic/insulin resistance syndrome and T2D. RESULTS: Subjects with T2D or NAFLD showed significantly increased serum Fetuin-B levels compared to their controls (4.25 ± 1.35 vs. 4.08 ± 1.38 µg/ml for diabetes; and 4.26 ± 1.41 vs. 4.07 ± 1.33 µg/ml for NAFLD; both p-values < 0.05). NAFLD and higher serum Fetuin-B were significantly associated with higher risk of T2D with adjustment for sociodemographic and lifestyle habits; and the adjusted ORs (95%CIs) were 2.90 (2.17-3.87, p < 0.001) and 1.16 (1.01-1.32, p = 0.032), respectively. With further adjustment for metabolic/insulin resistance syndrome (BMI, systolic and diastolic BP, triglyceride, total cholesterol, HDL- and LDL-cholesterol, HOMA-IR and serum uric acid), NAFLD but not serum Fetuin-B was significantly associated with increased risk of T2D (ORs (95%CIs): 1.58 (1.12-2.21, p = 0.009) and 1.07 (0.92-1.23, p = 0.384), respectively). A one pathway model by using SEM fitted well (χ2 = 497.92, p < 0.001; CFI = 0.965; TLI = 0.926; and RMSEA = 0.097) and showed that NAFLD increased serum Fetuin-B and elevated Fetuin-B increased fasting insulin level, which in turn induced insulin resistance and T2D. Besides, NAFLD increased the risk of T2D directly in addition to its indirect effects of inducing metabolic/insulin resistance syndrome which in turn increased the risk of T2D. CONCLUSIONS: Fetuin-B links NAFLD to T2D via inducing insulin resistance, and NAFLD contributes to the pathogenesis of T2D via multiple mechanisms.
OBJECTIVE: Laboratory models suggested that Fetuin-Bimpaired insulin action in myotubes and hepatocytes and caused glucose intolerance in mice. We aimed to explore the independent associations and pathways among serum Fetuin-B, nonalcoholic fatty liver disease (NAFLD) and type 2 diabetes (T2D). METHODS: A cross-sectional study of 1318 obese adults who underwent serum Fetuin-B test and hepatic ultrasonography scanning was conducted in Xiamen, China. Multivariable logistic regression was used to calculate adjusted odds ratio (OR) and 95% confidence intervals (CI) of serum Fetuin-B level and NAFLD for T2D in different models with adjustment for potential confounders. Structural equation modeling (SEM) was used to examine the paths among NAFLD, serum Fetuin-B, metabolic/insulin resistance syndrome and T2D. RESULTS: Subjects with T2D or NAFLD showed significantly increased serum Fetuin-B levels compared to their controls (4.25 ± 1.35 vs. 4.08 ± 1.38 µg/ml for diabetes; and 4.26 ± 1.41 vs. 4.07 ± 1.33 µg/ml for NAFLD; both p-values < 0.05). NAFLD and higher serum Fetuin-B were significantly associated with higher risk of T2D with adjustment for sociodemographic and lifestyle habits; and the adjusted ORs (95%CIs) were 2.90 (2.17-3.87, p < 0.001) and 1.16 (1.01-1.32, p = 0.032), respectively. With further adjustment for metabolic/insulin resistance syndrome (BMI, systolic and diastolic BP, triglyceride, total cholesterol, HDL- and LDL-cholesterol, HOMA-IR and serum uric acid), NAFLD but not serum Fetuin-B was significantly associated with increased risk of T2D (ORs (95%CIs): 1.58 (1.12-2.21, p = 0.009) and 1.07 (0.92-1.23, p = 0.384), respectively). A one pathway model by using SEM fitted well (χ2 = 497.92, p < 0.001; CFI = 0.965; TLI = 0.926; and RMSEA = 0.097) and showed that NAFLD increased serum Fetuin-B and elevated Fetuin-B increased fasting insulin level, which in turn induced insulin resistance and T2D. Besides, NAFLD increased the risk of T2D directly in addition to its indirect effects of inducing metabolic/insulin resistance syndrome which in turn increased the risk of T2D. CONCLUSIONS:Fetuin-B links NAFLD to T2D via inducing insulin resistance, and NAFLD contributes to the pathogenesis of T2D via multiple mechanisms.
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