Objective:To investigate the relationship between different types of tea intake and COVID-19 infection.Methods:Data were retrieved from a genome-wide association study(GWAS),involving 447 485,and 64 949 people for single nucleotide polymorphisms(SNPs).Two-sample Mendelian randomization(MR)analysis was used to investigate the relationship of different types of tea intake with four subgroups of COVID-19 infected population,including COVID-19 infected population versus general population,COVID-19 hospitalized population versus general population,COVID-19 hospitalized population versus non-hospitalized population,and very severe respiratory confirmed population versus general population.Inverse-variance weighted(IVW)method was used as the main method of causal analysis.MR Egger intercept was used for pleiotropy test,and Cochran's Q-statistic was used for heterogeneity test.Results:Compared to the general population,tea intake decreased the incidence of COVID-19 in the infection population(IVW method,OR=0.806,95%CI:0.651-0.999),and the hospitalized population(IVW method,OR=0.533,95%CI:0.369-0.770).Additionally,the underlying pleiotropy was not found following the MR-Egger regression intercept(MR intercept=-0.002,P=0.667),and the Cochran's Q-statistic showed no heterogeneity(Q-statistic=52.712,P=0.057).Compared to the general population,the underlying pleiotropy in the hospitalized patients was not found by MR-Egger regression intercept(MR intercept=-0.001,P=0.909),and the Cochran's Q-statistic showed no heterogeneity(Q-statistic=25.214,P=0.945).However,green tea and herbal tea had no effect on COVID-19 infection.Conclusions:Overall tea intake reduces the risk of COVID-19 infection in the general population compared to COVID-19 infected and hospitalized populations,while green tea and herbal tea have no protective effect against COVID-19 infection.

Objective:To investigate the relationship between different types of tea intake and COVID-19 infection.Methods:Data were retrieved from a genome-wide association study(GWAS),involving 447 485,and 64 949 people for single nucleotide polymorphisms(SNPs).Two-sample Mendelian randomization(MR)analysis was used to investigate the relationship of different types of tea intake with four subgroups of COVID-19 infected population,including COVID-19 infected population versus general population,COVID-19 hospitalized population versus general population,COVID-19 hospitalized population versus non-hospitalized population,and very severe respiratory confirmed population versus general population.Inverse-variance weighted(IVW)method was used as the main method of causal analysis.MR Egger intercept was used for pleiotropy test,and Cochran's Q-statistic was used for heterogeneity test.Results:Compared to the general population,tea intake decreased the incidence of COVID-19 in the infection population(IVW method,OR=0.806,95%CI:0.651-0.999),and the hospitalized population(IVW method,OR=0.533,95%CI:0.369-0.770).Additionally,the underlying pleiotropy was not found following the MR-Egger regression intercept(MR intercept=-0.002,P=0.667),and the Cochran's Q-statistic showed no heterogeneity(Q-statistic=52.712,P=0.057).Compared to the general population,the underlying pleiotropy in the hospitalized patients was not found by MR-Egger regression intercept(MR intercept=-0.001,P=0.909),and the Cochran's Q-statistic showed no heterogeneity(Q-statistic=25.214,P=0.945).However,green tea and herbal tea had no effect on COVID-19 infection.Conclusions:Overall tea intake reduces the risk of COVID-19 infection in the general population compared to COVID-19 infected and hospitalized populations,while green tea and herbal tea have no protective effect against COVID-19 infection.

The choice of ligation site of inferior mesenteric artery and vein in radical resection of rectal cancer still is crucial and full of controversy. It is also the key to determine whether the lymph node dissection is complete, whether the related nerves and vessels are injured after operation, whether the blood supply of the bowel and the anastomotic stoma are affected, and whether the quality of life of patients is guaranteed. Therefore, this article reviews the literature at home and abroad in recent years and summarizes the treatment of inferior mesenteric artery and vein ligation position, and elaborates the influence of different ligation sites on the oncological benefit and functional prognosis of patients, aiming to provide clinical reference for surgeons to solve such problems and achieve the best clinical effect.

OBJECTIVE To investigate the effect of erianin on the angiogenesis of glomerular endothelial cells in diabetic nephropathy(DN)rats and the role of slit homolog 2 protein(Slit2)/roundabout homolog 1(Robo1)consecutive signaling pathway.METHODS Rats were fed with high sugar and high fat feed for 8 weeks,before being intraperitoneally injected with streptozotocin solution(35 mg·kg-1)to prepare a DN rat model.DN rats were divided into the model group and model+erianin 10,20 and 40 mg·kg-1 groups,with 10 rats in each,while another 10 rats served as normal control group.The urine protein quantification kit was used to measure the 24 h urine protein level of rats in each group while the automatic biochemical analyzer was used to detect the fasting plasma glucose(FPG)and serum creatinine(Scr)levels of rats in each group.PAS staining was applied to observe the pathological changes in the renal tissue of rats in each group.Immunofluorescence was used to detect the expressions of platelet endo-thelial cell adhesion molecule-31(CD31)and podocalyxin(PCX)in kidney tissue of rats in each group.Western blot was adopted to detect the expressions of Slit2 and Robo1 proteins in the renal tissues of rats in each group.RESULTS Compared with normal control group,the CD31 protein expressions,FPG,Scr,24 h urine protein levels,and renal tissue Slit2 and Robo1 protein expressions were significantly increased in the model group(P<0.05).Pathological and immunofluorescence results suggested that rats in the model group developed many neoplastic glomerular capillaries,glomerular hypertrophy,and dilated mesangial areas,with non-tubular CD31 staining lacking adjacent PCX staining,and partial staining of tubular areas of CD31 lacking adjacent PCX staining.Compared with the model group,the CD31 glomerular endothelial area,FPG,Scr,24 h urine protein levels,and protein expressions of Slit2 and Robo1 in renal tissues were significantly reduced in the model+erianin 10,20 and 40 mg·kg-1 groups(P<0.05).Pathological and immunofluorescence results showed new glomerular capillaries,glomerular hypertrophy and dilatation of the thylakoid area were attenuated in rats,and CD31 tubular region staining was essentially adjacent to the PCX foot cell region staining in the model+erianin 10,20 and 40 mg·kg-1 groups.CONCLUSION Erianin may inhibit angiogenesis in glomerular endothelial cells of DN model rats by inhibiting the Slit2/Robo1 signaling pathway.

Vitamin D is an active derivative of fat-soluble steroid, which can promotes the absorption of Ca in the intestine and maintains the concentrations of serum Ca in blood as well as phosphate.Recent researches found that the lack of vitamin D would increase the risk of respiratory diseases, cardiovascular diseases, autoimmune diseases, neuropsychiatric diseases, tumors and other metabolic diseases in addition to affecting the development of bones.More stu-dies have shown that low vitamin D levels is related to respiratory diseases in children.In this review, the physiological characteristics of vitamin D and the relationship with respiratory diseases in children were discussed.

Objective: To observe the short-term changes of Body Mass Index (BMI) and Waist Circumference (WC) in junior high school students in Harbin, and to explore its association with the changes of high-sensitivity C-reactive protein (hs-CRP) in the same period. Furthermore, to analyze the value of hs-CRP to predict the BMI and WC changes in children and adolescents. Methods: Convenient sampling method was used,and the students in grades 6 and 7 in junior high school in Harbin were selected by stratified clicstering. Physical examination and serum hs-CRP were performed for two consecutive years. According to the results of the two surveys, the subjects were divided into control group (normal → normal), case group (abnormal → abnormal), improved group (abnormal → normal) and progression group (normal → abnormal). The multinomial logistic regression was used to analyze the predictive value of hs-CRP changes for BMI and WC changes. Results: The rate of overweight and obesity among samples from junior high school was 30.6%. The increment of BMI in female was more obvious than that in male(U=17 358.0，P<0.05). Both increments in BMI and WC were positively correlated with increments in hs-CRP(P<0.05). The risk of occurrence of "BMI always abnormal" and "WC always abnormal" increased sequentially in hs-CRP "normal → abnormal", "abnormal → normal" and "abnormal → abnormal", were 3.45 times, 5.98 times and 38.84 times of "BMI is always normal", respectively; and were 3.45 times, 4.26 times and 28.50 times of "WC is always normal", respectively. The risk of "BMI improvement" was 7.70 times more than that of BMI "always normal" when hs-CRP "abnormal → normal". Conclusion The prevalence of overweight and obesity in junior high school students in Harbin is high. The BMI increases faster in female from junior high school. The trends of change of BMI and WC are consistent with the trend of change of hs-CRP. The “hs-CRP change” has a good predictive value for BMI and WC development.

Objective To investigate the role of the combination of alpha2-heremans-schmid glycoprotein (AHSG) , tumor necrosis factor-α (TNF-α) , and interleukin-1 β (IL-1β) in detecting carotid vulnerable plaque in patients with acute cerebral infarction (ACI). Methods A total of 136 ACI patients were enrolled. According to the carotid ultrasound results, patients were assigned into the stable plaque group (n = 57) and vulnerable plaque group (n = 79). And their clinical data were collected. Logistic regression analyses were performed to identify independent risk factors of carotid vulnerable plaque in ACI patients. Receiver operating characteristic (ROC) was used to explore the diagnostic efficacy of AHSG, TNF-α, IL-1β and their combination in detecting carotid vulnerable plaque. Results (1) AHSG level of vulnerable plaque group was significantly lower than that of stable plaque group (P < 0.05) , while the levels of TNF-α and IL-1β of vulnerable plaque group were higher than those of stable plaque group. (2) Multivariate logistic regression analyses revealed that hypertension (OR = 1.257, 95％CI: 1.017～ 1.554) , type 2 diabetes (OR=1.474, 95％ CI: 1.048 ～2.074) , AHSG (OR= 0.510, 95％ CI:0.287 ～0.920) , TNF-α (OR = 1.020, 95％CI: 1.006 ～1.029) and IL-1β (OR= 1.484, 95％CI: 1.067 ～2.062) were independent risk factors of carotid vulnerable plaque. (3) ROC curves revealed that the area under the curve (AUC) of AHSG combined with TNF-α and IL-1β detecting carotid vulnerable plaque was 0.903 (95％CI: 0.840～0.947) , with sensitivity of 89.87％ and specificity of 75.44％, which was significantly superior to that of three individual biomarker (P < 0.05). Conclusions AHSG, TNF-α and IL-1β are independent risk factors of carotid vulnerable plaque in ACI patients, and their combination has the highest predictive efficacy which is of high clinical significance.

Objective To study the effects and side effects of different dose of rHu-EPO on the treatment of brain injury in premature infants. Methods The infants who had suffered fetal distress and first one minute of Apgar was under 7score after birth and were sent to NICU within 24h were studied. We totally collected 90 infants and divided into three groups randomly, including large dose group, small dose group and control group. The large and small group were injected hypodermicly with rHu-EPO 1000U/kg, 500U/kg, three times per week for three weeks, and the control group were given general treatment without rHu-EPO at same time. Before treatment, one week and three weeks after treatment, we collected concentration of NSE, S100B and skull ultrasound to assess the effects. Neonatal behavioral neurological assessment(NBNA) were performed twice before and at weeks of correct gestational age. To survey the side effects, we collected general information such as the incidence rate of ROP and hemangioma, AST/ALT/PLT/Urea /Cr and so on. Results After one-week treatment, the concentration of NSE and S100B were no significant difference(P ＞ 0. 05) in the small dose group, but were statistically significant in the large dose group(P ＜ 0. 05). After three-week treatment, the comparison of NSE、S100B in both groups was statistically significant(P ＜ 0. 05). The head ultrasound comparison was of statistically significant in both group(P ＜ 0. 05), and so as NBNA and head MRI. The frequency of blood transfusion was statistically significant in both group(P ＜ 0. 05) compared with control group. Routine blood test including liver and kidney function showed that there was no significant difference before and after treatment(P ＞ 0. 05). Conclusion The neuroprotective effect of rHu-EPO on brain injury in preterm infants is connected with its dose and period of treatment, it need high dose or long time to express neuroprotective function.

Objective To understand the relationship between coagulation function and birth weight and gestational age in newborn. Methods Five hundred premature infants in NICU from June 2015 to June 2016 were enrolled. Perinatal high-risk factors(gestational hypertension, gestational diabetes, placenta previa, spontaneous premature delivery) and general status (gestational age, sex, delivery mode, birth weight)were documented. Blood coagulation function (PT, APTT, FDP, DD, FIB, AT-Ⅲ) was detected within 6 h after birth. The premature infants were divided into three groups according to gestational age, early preterm neonate group (28-30+6 weeks, 48 cases), moderate preterm neonate group (31-33+6 weeks, 125 cases), and late preterm neonate group (34-36+6 weeks, 216 cases). And there were 111 term infants (37- 42 weeks, 111 cases). In addition , the relation between birth weight and coagulation function was analyzed. Sixty-six twins were collected and divided into tow groups according to their weight, the-lighter group and the-heavier group. The coagulation function was analyzed and compared among different gestational age groups. Results There were no differences in perinatal risk factors (P > 0.05). There were significant differences in various coagulation parameters among three groups [APTT: (93.25 ± 21.34), (82.80 ± 21.37), (78.29 ± 17.77), (62.03 ± 13.7) s;FIB: (1.95 ± 0.96), (1.67 ± 0.60), (1.51 ± 2.44), (1.40 ± 0.85) g/L; DD: (2.11 ± 0.64), (1.02 ± 0.33), (0.66 ± 0.31), (0.51 ± 0.25) mg/L;AT-Ⅲ:(25.89 ± 11.80)%, (33.86 ± 11.40)%, (36.65 ± 13.60)%, (45.18 ± 14.82)%] (P<0.05). The levels of APTT, FDP, DD tended to decrease with the increasing of gestational age. The level of FIB and AT-Ⅲtended to increase with the increasing of gestational age. Correlation analysis showed that the levels of APTT, FDP, and DD were negatively correlated with gestational age (P<0.05) and the levels of FIB and AT-Ⅲwere positively correlated with gestational age (P<0.05). In the twins group, no significant difference was showed in different weight (P > 0.05). Conclusions The coagulation function in early life in premature infants is associated with gestational age, and has no relationship with birth weight. The coagulation function of premature infants is in a changing and gradually mature process, which should be monitored dynamically.