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Objective@#To explore the relationship between dietary patterns and central precocious puberty in children, and to provide a scientific basis for dietary prevention of precocious puberty.@*Methods@#A case-control study was conducted, among 35 newly diagnosed central precocious puberty girls from May to December 2019 as the case group, and 70 healthy girls with normal development as the control group. Physical development examination, parent questionnaire survey and child interview were carried out. Dietary information was assessed using a simplified food frequency questionnaire(FFQ). Principal component analysis was used to identify children s dietary patterns, and multiple Logistic regression was used to assess the association between dietary patterns and precocious puberty.@*Results@#Three different dietary patterns have been established, namely "snack and processed food type", "animal protein type" and "nutritional tonic type" dietary patterns, respectively. After adjusting for covariates such as age and BMI, Logistic regression analysis showed that the "snack and processed food type" dietary pattern was positively correlated with precocious puberty(OR=10.81, 95%CI=2.59-45.15, P<0.01). There was a negative correlation between "animal protein type" and precocious puberty(OR=0.24, 95%CI=0.06-0.91, P=0.04), while the association between "nutritive tonic" and precocious puberty was not statistically significant(OR=0.28, 95%CI=0.07-1.05, P=0.06).@*Conclusion@#Children s dietary patterns were related to precocious puberty." Snack and processed food "dietary pattern with a high intake of fried foods, puffed foods, foods containing preservatives or pigments, western fast foods, chocolate and products, was closely related to central precocious puberty.
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Objective@#To examine pubertal timing across body mass index (BMI) trajectory under polygenic susceptibility in boys and girls,and to provide a reference basis for children’s adolescent development deviation form early intervention strategies.@*Methods@#All the participants were recruited from 1 to 3 grade in 2016 from 2 Bengbu primary school and were followed up for 3 consecutive years. The study comprised 997 children (418 boys) with available data for height, weight, BMI, breast Tanner stages and testicular volume annually. The polygenic risk score (PRS) was computed based on 17 SNPs derived from published genome-wide association studies for early pubertal timing. Group-based trajectory model (GBTM) was used to identified BMI trajectory in children. Accelerated failure time model (AFT) was used to examine associations of different BMI trajectory and polygenic risk with pubertal development in boys and girls.@*Results@#Classes of BMI trajectory were persistently healthy weight, persistently overweight and persistently obesity. Adjusted concomitant variables, boys with persistently obesity exhibited 6.10-mo delay of testicular volume in low polygenic risk group (adjusted TR=1.05，P=0.04). Compared with the girls in persistently healthy weight group, the girls with low PRS were persistently overweight or obesity, which was associated with thelarche age 3.42 and 6.84-mo earlier, respectively (adjusted TR=0.97，0.94,P<0.01). Persistently overweight or obesity in girls with moderate PRS was associated with an earlier age of thelarche timing of 6.72 and 8.96-mo, respectively (adjusted TR=0.94，0.92, P<0.01). At high PRS groups, the persistently obese girls were found to have a more advanced age (10.80 and 12.96-mo, respectively) of thelarche (adjusted TR=0.90，0.88, P<0.01).@*Conclusion@#Persistently overweight and obesity is associated with early thelarche in girls, but persistently obesity may increase delayed puberty risk in boys with low polygenic risk.
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@#[Abstract] Objective: To study the effects of twisted gastrulation protein homolog 1 (TWSG1) gene on proliferation and apoptosis of gastric cancer MGC-803 cells. Methods: Three siRNAs for TWSG1 gene were designed.The MGC-803 cells at logarithmic phase were divided into blank control group, negative control group (siRNA-NC), siRNA1 interference group, siRNA2 interference group and siRNA3 interference group by transfecting with relevant vectors. The mRNAand protein expressions of TWSG1 in each group were identified by qPCR and Western blotting, respectively; and the stable cell line with highest interference efficiency was screened.The proliferation of cells in each group was detected by CCK-8 assay, and the apoptosis of three groups was detected by flow cytometry. Results: The results of qPCR and Western blotting showed siRNA1 exhibited highest interference efficiency. Compared with the blank control group and the negative control group, the expression of TWSG1 in siRNAinterference cell group was lower (P<0.05), the cell proliferation significantly increased (P<0.05), and apoptosis significantly reduced (P<0.05). Conclusion: siRNA interfering TWSG1 expression in MGC-803 cells can promote cell proliferation, inhibit cell apoptosis.