This study aims to determine the nephrotoxic effects of 3-monochloropropanel-1,2-diol(3-MCPD)on female and male SD rats.A nephrotoxicity model was established by gavage of dif-ferent doses of 3-MCPD,and 80 SD rats were randomly divided into four groups:the control group(0 mg/kg 3-MCPD),low-dose group(15 mg/kg 3-MCPD),medium-dose group(30 mg/kg 3-MCPD),high-dose group(60 mg/kg 3-MCPD),with half female and half male.The body mass and food intake of the rats were recorded weekly,and the urine and blood and kidney tissues were col-lected after 28 consecutive days of gavage,and the blood erythrocyte count(WBC),white blood cell count(RBC),hemoglobin(HGB),erythrocyte-compaction-transfer-value(HCT),creatinine(CREA),serum urea nitrogen(BUN),and the indexes of blood phosphorus(P)and calcium(Ca)were detected;the level of kidney injury molecule(KIM-1)was measured by ELISA kit;the renal pathological changes was observed by histopathology method;and transcriptome sequencing was used to analyze differential genes in female and male rats.The results showed that 3-MCPD did not significantly affect the growth of male rats,but high doses significantly reduced the weight and food intake of female rats.The high-dose group of 3-MCPD caused a significant decrease in RBC,HGB,and HCT levels in both male and female rats,resulting in a significant increase in KIM-1 and P,and a significant decrease in Ca,but only a significant increase in CREA and BUN in female rats.Histopathology showed that in the high-dose group of male rats,only mild renal tubular dilation,epithelial cell edema,and clear tubular type were observed in the kidneys,while in female rats,a large number of renal sacs,clear tubular type,and interstitial inflammatory cells with fibrosis were observed in the kidneys.Transcriptome sequencing showed 1 712 differentially expressed genes in the high-dose group of female rats and 1 153 differentially expressed genes in the high-dose group of male rats.KEGG enrichment analysis showed that both male and female rats in the high-dose group experienced oxidative stress and cell apoptosis,but 3-MCPD may also participate in the process of kidney damage in females by inhibiting autophagy and inducing iron death pathways.The above results indicate that high-dose 3-MCPD has a more significant nephrotoxic effect on fe-male rats.

This study aims to determine the nephrotoxic effects of 3-monochloropropanel-1,2-diol(3-MCPD)on female and male SD rats.A nephrotoxicity model was established by gavage of dif-ferent doses of 3-MCPD,and 80 SD rats were randomly divided into four groups:the control group(0 mg/kg 3-MCPD),low-dose group(15 mg/kg 3-MCPD),medium-dose group(30 mg/kg 3-MCPD),high-dose group(60 mg/kg 3-MCPD),with half female and half male.The body mass and food intake of the rats were recorded weekly,and the urine and blood and kidney tissues were col-lected after 28 consecutive days of gavage,and the blood erythrocyte count(WBC),white blood cell count(RBC),hemoglobin(HGB),erythrocyte-compaction-transfer-value(HCT),creatinine(CREA),serum urea nitrogen(BUN),and the indexes of blood phosphorus(P)and calcium(Ca)were detected;the level of kidney injury molecule(KIM-1)was measured by ELISA kit;the renal pathological changes was observed by histopathology method;and transcriptome sequencing was used to analyze differential genes in female and male rats.The results showed that 3-MCPD did not significantly affect the growth of male rats,but high doses significantly reduced the weight and food intake of female rats.The high-dose group of 3-MCPD caused a significant decrease in RBC,HGB,and HCT levels in both male and female rats,resulting in a significant increase in KIM-1 and P,and a significant decrease in Ca,but only a significant increase in CREA and BUN in female rats.Histopathology showed that in the high-dose group of male rats,only mild renal tubular dilation,epithelial cell edema,and clear tubular type were observed in the kidneys,while in female rats,a large number of renal sacs,clear tubular type,and interstitial inflammatory cells with fibrosis were observed in the kidneys.Transcriptome sequencing showed 1 712 differentially expressed genes in the high-dose group of female rats and 1 153 differentially expressed genes in the high-dose group of male rats.KEGG enrichment analysis showed that both male and female rats in the high-dose group experienced oxidative stress and cell apoptosis,but 3-MCPD may also participate in the process of kidney damage in females by inhibiting autophagy and inducing iron death pathways.The above results indicate that high-dose 3-MCPD has a more significant nephrotoxic effect on fe-male rats.

Objective: To determine the distribution characteristics of waist circumference (WC), waist height ratio (WHtR) of 6–18 years olds in Guangzhou, and to put forward the WC and WHtR appropriate boundary values for 6–18 years olds on the basis of cardiovascular disease (CVD) risk factor assessment. Methods: We analyzed the height, weight, WC and its metabolic indication data (blood pressure, fasting blood glucose, and blood lipids) of 15 000 children in Guangzhou, aged 6–18, with the receiver-operating characteristic curve (ROC), and explored the best value point of WC and WHtRfor the prediction of cardiovascular diseases. Results: When the WC percent reached P85, and WHtR reached 0.48, the cardiovascular risk factors of fasting blood-glucose, blood pressure, and blood fat were signiifcantly higher. Conclusion: The 85th percentile value of WC and 0.48 of WHtR are the appropriate boundary values in increasing the cardiovascular disease risk factors in Chinese children and teenagers. WC and WHtR as a relatively simple inspection method, can well predict cardiovascular diseases, and be used in the conventional measuring items among students.