[The association between overweight/obesity and the risk of malignancy in Hürthle cell neoplasms of the thyroid].

Objective: To explore the association between obesity/overweight and the risk of malignancy in Hürthle cell neoplasms of the thyroid. Methods: The data of patients with complete data who were diagnosed with Hürthle cell neoplasms of the thyroid at the Third Hospital of Peking University from September 2016 to September 2023 were retrospectively collected. Based on postoperative pathological diagnosis, tumors were classified into thyroid Hürthle cell adenoma group and Hürthle cell carcinoma group. Multivariate logistic regression analysis was employed to explore the association between overweight/obesity and the risk of malignancy in Hürthle cell neoplasms of the thyroid. Results: A total of 102 patients (13 males and 89 females) were included, aged (48.7±13.1) years. There were 22 cases of thyroid Hürthle cell carcinoma and 80 cases of thyroid Hürthle cell adenoma. Univariate analysis showed that the rate of overweight/obesity in the Hürthle cell carcinoma group was higher than that in the adenoma group [73% (16/22) vs 46% (37/80), P=0.050]. Multivariate logistic regression analysis indicated that the overweight/obese patients had a higher risk of malignancy in Hürthle cell neoplasms of the thyroid compared with the non-overweight/obese patients (OR=3.170, 95%CI: 1.126-9.955, P=0.035). Sensitivity analysis excluding individuals with multiple tumors was consistent with the main study results (OR=2.878, 95%CI: 0.922-10.228, P=0.080). Conclusion: Overweight/obesity may be associated with a higher risk of malignancy in patients with Hürthle cell neoplasms of the thyroid.

[Influence of rs2587552 polymorphism of DRD2 gene on the effect of a childhood obesity intervention: A prospective, parallel-group controlled trial].

OBJECTIVE: To explore the association between rs2587552 polymorphism (has a strong lin-kage disequilibrium with rs1800497 which had been found in many studies to be related to obesity, r2=0.85) of DRD2 gene and the effect of a childhood obesity intervention in Chinese population, and provide a scientific basis for future personalized childhood obesity intervention based on genetic background. METHODS: From a multi-center cluster randomized controlled trial studying the effect of a childhood obesity intervention, we enrolled 382 children from 8 primary schools (192 and 190 children from intervention and control groups, respectively) in Beijing as study subjects. Saliva was collected and DNA was extracted to detect the rs2587552 polymorphism of DRD2 gene, and the interactions between the gene and study arms on childhood obesity indicators [including body weight, body mass index (BMI), BMI Z-score, waist circumference, hip circumference, waist-to-hip ratio, waist-to-height ratio, and body fat percentage] were analyzed. RESULTS: No association was found between rs2587552 polymorphism and the changes in hip circumference or body fat percentage in the intervention group (P>0.05). However, in the control group, children carrying the A allele at DRD2 rs2587552 locus showed a greater increase in hip circumference and body fat percentage compared with those not carrying A allele (P < 0.001). There were interactions between rs2587552 polymorphism of DRD2 gene and study arms on the changes in hip circumference and body fat percentage (P=0.007 and 0.015, respectively). Compared with the control group, children in the intervention group carrying the A allele at DRD2 rs2587552 locus showed decrease in hip circumference by (-1.30 cm, 95%CI: -2.25 to -0.35, P=0.007) and decrease in body fat percentage by (-1.34%, 95%CI: -2.42 to -0.27, P=0.015) compared with those not carrying A allele. The results were consistent between the dominant model and the additive model (hip circumfe-rence: -0.66 cm, 95%CI: -1.28 to -0.03, P=0.041; body fat percentage: -0.69%, 95%CI: -1.40 to 0.02, P=0.056). No interaction was found between rs2587552 polymorphism and study arms on the changes in other childhood obesity-related indicators (P>0.05). CONCLUSION: Children carrying the A allele at rs2587552 polymorphism of DRD2 gene are more sensitive to intervention and showed more improvement in hip circumference and body fat percentage after the intervention, suggesting that future personalized childhood obesity lifestyle intervention can be carried out based on the rs2587552 polymorphism of DRD2 gene.