Objective To study the effects of preterm birth, infection, pathological jaundice and asphyxia on neonatal thyroid function. Methods From April 2012 to April 2014,neonates within 7 days after birth admitted to the neonatal department of our hospital were recruited. The neonates with one or more of the 4 aforementioned conditions were assigned to the observation group; the full-term newborns without any diseases to the control group. 2 ml of venous blood from each patient was collected 5-7 days after birth to determine the levels of serum free iodine thyroid original glycine ( FT3 ) , free thyroxine ( FT4 ) and thyroid stimulating hormone ( TSH ) . The thyroid function of newborns in the observation group were re-examined after recovery, and compared among different groups and conditions. Results A total of 220 newborns were recruited in the observation group and 34 in the control group. FT3 in the observation group was significantly lower than the control group ( P＜0. 05 ) . As for FT4 and TSH, no statistically significant differences existed between the two groups ( p＞0. 05 ) . FT3 and FT4 in neonates with severe infection were significantly lower than mild infection ( P＜0. 05 ) . FT3 in the preterm group with gestational age ( GA ) ≤32 weeks was significantly lower than GA＞32 weeks, and FT3 in the jaundice group, serum bilirubin level ≥ 342 mol/L group significantly lower than ＜342 mol/L group (P＜0. 05) . In the observation group, the re-examined FT3 concentration was significantly higher (P＜0. 05) than the result tested 5-7 days after birth while FT4 and TSH didn′t show significant differences. And no significant differences existed between the observation group and the control group in re-examined thyroid functions ( P＞0. 05 ) . The multivariate analysis showed that GA, pathological jaundice, infection and asphyxia were associated with FT3 concentration 5-7 days after birth (P＜0. 05), while the delivery method and gender not (P＞0. 05). Conclusions The main effect of preterm birth, infection, pathological jaundice and asphyxia on thyroid function was to decrease FT3 temporarily. Severe infection might decrease FT4 temporarily. However, the thyroid function would return to normal with recovery.

AIM:To explore whether miR-21 low expression enhances the effect of matrine ( MAT) on the ap-optosis of hepatocellular carcinoma cells .METHODS:Real-time fluorescence quantitative PCR ( RT-qPCR) was used to detect the expression of miR-21 in the HepG2 cells treated with different concentrations of MAT .The effect of miR-21 on MAT-induced HepG2 cell apoptosis was analyzed by flow cytometry .The mRNA and protein expression of Bcl-2 and Bax in the HepG2 cells treated with MAT was determined by RT-qPCR and Western blot .RESULTS:The expression of miR-21 increased with the increasing concentration of MAT .Low expression of miR-21 promoted MAT-induced apoptosis , and en-hanced the expression of Bax at mRNA and protein levels ( P<0.05 ) , while inhibited the expression of Bcl-2 at mRNA and protein levels (P<0.05).CONCLUSION:Low expression of miR-21 enhances MAT-induced HepG2 cell apoptosis by inhibiting the expression of Bcl-2 and promoting Bax expression .

Objective: To provide data support for AIDS prevention and control by investigating HIV testing among technician school students in Guangzhou. Methods: A total of 1 112 students were investigated with a questionnaire about AIDS knowledge, attitude, sexual behavior and HIV testing through a stratified cluster random sampling method in October 2018. A Logistic regression analysis was conducted for influencing factors of students’ HIV testing. Results: The HIV testing rate of technician school student was 10.3%. The HIV testing rate (12.1%-24.3%) of male, under 18 years of age, with monthly living expenses over 3 000 yuan and with poor family atmosphere was higher than that of the corresponding group (6.6%-8.4%), the difference were statistically significant (χ2=12.07,7.25,10.73,9.77, P<0.05). Multivariate Logistic regression analysis showed that <18 years of age, willingness to participate in relevant AIDS prevention activities, homosexuality, “support for multiple sexual partners” and having sexual behavior were associated with more HIV testing(P<0.05). Conclusion The incidence of sexual behavior of students in technician school is high while the rate of HIV testing is low, especially for male and male homosexuals.The health and education departments should strengthen students’ AIDS counseling and testing services and raise students’ awareness of AIDS risk in order to improve the coverage of students’ HIV testing.

Objective To investigate the effect of radial artery calcification (RAC) on survival of arteriovenous fistula (AVF) and the patients in end?stage renal disease. Methods Adult ESRD patients undergoing AVF surgery between January 2013 and January 2016 at the Eighth Affiliated Hospital of Sun Yat?sen University were enrolled in this study. The clinical and biochemical data were collected. Segment of radial artery were obtained from the operation of AVF. RAC at the site of anastomotic were observed by alizarin red S and hematoxylin and eosin staining. According to RAC, the patients were divided into calcification group and non?calcification group. Kaplan?Meier analysis was performed to analyze the survival rates of the two groups, and Cox proportional hazards regression——model was used to estimate the risk factors of AVF dysfunction and all?cause mortality in ESRD patients. Results Among 180 cases of ESRD patients, 38 cases (21.1％) were developed RAC at the site of anastomotic in different degrees. Compared with the non?calcification groups, the calcification groups had a longer dialysis vintage, a higher proportion of diabetes and higher level of HbAlc (all P﹤0.05). Binary logistic regression analysis showed that dialysis vintage>5 years and diabetics were two independent risk factors of RAC at the site of anastomotic. Kaplan?Meier survival analysis demonstrated that there were no statistical differences between two groups in AVF survival (χ2=0.009, P=0.926). Calcification group had higher all?cause mortality than non?calcification groups (χ2=9.809, P=0.002). Multivariate Cox regression analysis demonstrated that homocysteine was independent risk factor for AVF dysfunction (HR=1.027, 95％CI: 1.003-1.051, P=0.027). Age was independent risk factor for all?cause mortality (HR=1.078, 95％CI: 1.035-1.122, P=0.000). Conclusions Dialysis vintage>5 years and diabetes were two independent risk factors of RAC at the site of anastomotic in ESRD patients. RAC at the site of anastomotic had no effect on AVF survival, but increased all?cause mortality.

Objective:To analyze and compare VP1 and VP4 genetic characteristics of human enterovirus 71(EV71) isolated from children with severe and mild hand-foot and mouth disease(HFMD).Methods:EV71 strains isolated from severe HFMD patients (6 cases) and mild HFMD patients (6 cases) in Taizhou district, Zhejiang province were included during 2016.Total virus RNA was extracted by Viral RNA Mini Extraction Kit, and reverse transcription polymerase chain reaction(RT-PCR) was used to amplify the sequence of the VP1 and VP4 genes of EV71.And then the sequencing results were compared with those of A, B, C genotype reference EV71 strains from GenBank by nucleotide alignment and amino acid alignment analysis.Results:There were no statistically significant differences in sex and age between the two groups(χ 2=14.51, t=2.82, all P<0.05). The homogeneity between EV71 strains from severe patients and mild patients was 95.8%~99.6% and 99.1%~100.0% for VP1 nucleotide sequences and amino acid sequences, respectively, while 95.0%~99.9% and 99.0%~100.0% for VP4 nucleotide sequences and amino acid sequences, respectively.The twelve EV71 strains isolated from HFMD patients in Taizhou shared the highest identity with EV71-genotype C, especially genotype C4a.In addition, compared with the mild patients, three respective strains from severe HFMD patients showed mutations at the residue 170 in the VP1 protein(V→L), residue 293 in the VP1 protein(A→S) and residue 7 in the VP4 protein(T→A). Conclusion:All EV71 strains isolated from severe and mild HFMD patients in Taizhou district share high homology of nucleotide and amino sequence, and all of them belong to subgenogroup C4a.The mutations in the VP1 and VP4 of EV71 might be related to HFMD disease severity.

Objective To evaluate potential protective effects of inhaled budesonide on bronchopulmonary dysplasia (BPD) in premature infants and its impact on the intelligence development at 1 year of age. Methods A total of 82 preterm infants admitted to the neonatal intensive care center from January 2017 to January 2018 were selected as research subjects. The enrolled subjects were divided into a study group (Budesonide) and a control group (saline) by random number table method, with 41 cases in each group. The incidence of BPD, mortality, hospitalization time, time of withdrawal and oxygenation, and complications were compared between the two groups. The patients were regularly followed up to 1 year old after discharge. The physical growth and Gesell intelligence development of the two groups were compared. Results The incidence of BPD in the study group was significantly lower than that in the control group, and the difference was statistically significant (P<0.05). There was no significant difference in mortality between the two groups. The hospitalization time, weaning and oxygenation time, and 1-week re-intubation rate in the study group were significantly lower than those in the control group (P<0.05). There was no significant difference between the two groups in the incidence of adverse reactions and physical growth at 1 year old and Gesell intelligence evaluation. Conclusion Budesonide aerosol inhalation reduced the incidence of BPD in premature infants, shortened hospitalization and weaning time, and there were no near-term and long-term adverse reactions.