Objective We tried to investigate the effects of human umbilical cord mesenchymal stem cell exosomes(hUCMSC-Exos)on the proliferation of human dermal papilla cells(HDPCs)and the mechanism of hUCMSC-Exos promoting hair growth.Methods HDPCs were isolated using two-step enzymatic method and cul-tured in vitro.Human umbilical cord mesenchymal stem cells(hUC-MSCs)were cultured.Cell culture supernatant was collected,and exosomes were isolated and extracted using high-speed centrifugation.Electron microscopy,particle size,and surface marker identification were performed on them.Dihydrotestosterone(DHT)induces HDPCs and establishment of an androgenic alopecia cell model.Co-culture hUCMSC-Exos with HDPCs,cell proliferation experiment(EdU)was used to detect the relative activity of induced HDPCs.Real-time qPCR was used to detect the expression level of alkaline phosphatase(ALP),and Western blot was used to detect β-catenin,Wnt10b,GSK-3β expression at the protein level.Results The obtained primary HDPCs,hUC-MSCs,and hUCMSC-Exos were all conformed to the characteristics of dermal papilla cells,mesenchymal stem cells,and exosomes.The num-ber of EdU positive cells significantly increased,and exosomes could effectively promote the proliferation of HDPCs(P<0.05),enhance the vitality of HDPCs and alleviate the damage caused by DHT(P<0.05).Real-time qPCR showed that exosomes could enhance the expression level of ALP gene(P<0.05)and hair follicle induction ability.Western Blot confirmation β-catenin,Wnt10b,GSK-3β were differences in expression at the protein level(P<0.05).Conclusions HUCMSC-Exos could promote DHT induced proliferation of HDPCs,enhance their hair follicle regeneration and repair ability,and its mechanism may be related to the activation of Wnt/β-catenin signaling pathway.

Objective:To investigate the value of systemic inflammatory response syndrome (SIRS), pediatric sequential organ failure assessment (pSOFA) and pediatric critical illness score (PCIS) in predicting mortality of pediatric sepsis in pediatric intensive care units (PICU) from Southwest China.Methods:This was a prospective multicenter observational study. A total of 447 children with sepsis admitted to 12 PICU in Southwest China from April 2022 to March 2023 were enrolled. Based on the prognosis, the patients were divided into survival group and non-survival group. The physiological parameters of SIRS, pSOFA and PCIS were recorded and scored within 24 h after PICU admission. The general clinical data and some laboratory results were recorded. The area under the curve (AUC) of the receiver operating characteristic curve was used to compare the predictive value of SIRS, pSOFA and PCIS in mortality of pediatric sepsis.Results:Amongst 447 children with sepsis, 260 patients were male and 187 patients were female, aged 2.5 (0.8, 7.0) years, 405 patients were in the survival group and 42 patients were in the non-survival group. 418 patients (93.5%) met the criteria of SIRS, and 440 patients (98.4%) met the criteria of pSOFA≥2. There was no significant difference in the number of items meeting the SIRS criteria between the survival group and the non-survival group (3(2, 4) vs. 3(3, 4) points, Z=1.30, P=0.192). The pSOFA score of the non-survival group was significantly higher than that of the survival group (9(6, 12) vs. 4(3, 7) points, Z=6.56, P<0.001), and the PCIS score was significantly lower than that of the survival group (72(68, 81) vs. 82(76, 88) points, Z=5.90, P<0.001). The predictive value of pSOFA (AUC=0.82) and PCIS (AUC=0.78) for sepsis mortality was significantly higher than that of SIRS (AUC=0.56) ( Z=6.59, 4.23, both P<0.001). There was no significant difference between pSOFA and PCIS ( Z=1.35, P=0.176). Platelet count, procalcitonin, lactic acid, albumin, creatinine, total bilirubin, activated partial thromboplastin time, prothrombin time and international normalized ratio were all able to predict mortality of sepsis to a certain degree (AUC=0.64, 0.68, 0.80, 0.64, 0.68, 0.60, 0.77, 0.75, 0.76, all P<0.05). Conclusion:Compared with SIRS, both pSOFA and PCIS had better predictive value in the mortality of pediatric sepsis in PICU.

Objective:To explore the effect of self-health monitoring information platform in health management of pregnant women at home, so as to provide a reference for self health management of pregnant women at home.Methods:From January 2020 to January 2021, a total of 1 683 pregnant women in Hangzhou Women's Hospital were selected as the research objects using the convenient sampling method, and divided into the intervention group ( n=815) and the control group ( n=868) . The control group received routine antenatal examination, and the intervention group conducted self-health monitoring information platform and routine antenatal examination. The school attendance rate, sleep quality during pregnancy, detection rate of fetal distress, pregnancy weight gain and premature birth rate were compared between the two groups. Results:The school attendance rate, sleep quality during pregnancy, detection rate of fetal distress of the the intervention group were higher than those of the control group, the number of pregnant women with normal weight gain was higher than that of the control group, premature birth rate of the intervention group was lower than that of the control group, and the differences were statistically significant ( P<0.05) . Conclusions:Self-health monitoring information platform can improve the quality of sleep and normal weight gain during pregnancy of pregnant women, reduce the incidence of preterm birth, which has important application value under the background of the national "universal three-child" policy.

Objective:To investigate the value of bedside transthoracic echocardiography(TTE) in volume reactivity assessment of children with septic shock.Methods:A total of 41 children aged from 1 to 5 years with septic shock requiring mechanical ventilation admitted to PICU from January 2017 to June 2020 were prospectively included.Under the condition of complete mechanical ventilation, full sedation and analgesia, and no spontaneous breathing(tidal volume 8 to 10 mL/kg), volume expansion was given to children.Hemodynamic indexs such as cardiac index(CI), stroke volume index(SVI) and stroke volume variability(SVV) were measured before and after volume expansion by noninvasive cardiac output monitoring(NICOM) and TTE.Moreover, aortic flow velocity time integral variable degrees(ΔVTI), inferior vena cava variability(ΔIVC) and inferior vena cava dilation index(dIVC) were also measured by TTE.Patients were considered to be responsive to volume expansion if SVI NICOMincreased≥15%.Based on the responsiveness of volume expansion, all the patients were divided into response group and non-response group.The value of SVV TTE, ΔVTI, ΔIVC, dIVC, ΔCVP and SVV NICOMin predicting volume responsiveness were analysed. Results:(1) There were 23 cases in response group and 18 cases in non-response group.Before volume expansion, there were no statistically significant differences in general hemodynamic indexes HR, MAP, CVP, EF, CI NICOM, and CI TTEbetween two groups( P>0.05). (2) In response group, HR, MAP, CI, SVI and CVP were all improved after volume expansion( P<0.001). In non-response group, only CVP was significantly increased after volume expansion, while other indexes were not improved( P>0.05). (3)Before the volume expansion, SVV TTE, ΔVTI, ΔIVC, and dIVC in response group were higher than those in non-response group( P<0.001). After volume expansion, these indicators were significantly reduced in response group.In non-response group, only ΔIVC significantly reduced after volume expansion.(4) The receiver-operating characteristic curve analysis showed that the area under the curve of SVV TTEand ΔVTI was 0.971, with 12.04% as the threshold, the sensitivity was 0.957 and the specificity was 0.944. The area under the curve of ΔIVC was 0.981, with 25.98% as the threshold, the sensitivity was 0.870 and the specificity was 1.000.The area under the curve of dIVC was 0.980, with 29.86% as the threshold, the sensitivity was 0.870 and the specificity was 1.000. The area under the curve of ΔCVP was 0.778, with 2.5 cmH 2O(1 cmH 2O=0.098 kPa) as the threshold, the sensitivity was 0.913 and the specificity was 0.556. The area under the curve of SVV NICOMwas 0.874, with 12.50% as the threshold, the sensitivity was 0.869 and the specificity was 0.778. Conclusion:The dynamic indexes SVV, ΔVTI, ΔIVC and dIVC monitored by TTE have good accuracy in evaluating children′s volume responsiveness, among which the accuracy of ΔIVC and dIVC is relatively the highest; the value of ΔCVP in predicting volume responsiveness is limited.

Objective:To analyze the relationship between infection and transmission of HIV/AIDS, explore the characteristics of the HIV-1 transmission network, and provide evidence for formulating targeted prevention and control measures.Methods:The newly confirmed HIV/AIDS in Jiaxing from 2017 to 2018 were selected for the study. The sociodemographic and infection transmission-related information was gathered. The blood samples were collected and RNA was extracted, RT-PCR and nested PCR amplified the pol gene of HIV-1. The phylogenetic tree was constructed by Mega 6.0 software for subtype analysis. The genetic distance between strains was calculated, and the molecular transmission network was drawn by using Cytoscape 3.6.0 software. The results of the epidemiological study based on the molecular transmission network were analyzed. Results:There were fifteen HIV-1 gene subtypes in 517 cases of HIV/AIDS. The main subtypes were CRF01_AE (37.1%)、CRF07_BC (36.2%) and CRF08_BC (11.8%). Under the 1.0% gene distance threshold, 87 molecular clusters were established, and the total clustering rate was 45.8% (237/517). The cluster risk factors were 60-81 age group (compared with 14-24 age group, OR=2.690, 95% CI:1.058-6.844), married (compared with unmarried, OR=1.698, 95% CI:1.003-2.875), CRF07_BC subtype (compared with CRF01_AE, OR=2.203, 95% CI:1.426-3.404). The largest molecular cluster, CRF07_BC-1, consisted of 50 cases (including 21 cases confirmed in 2017 cases and 29 confirmed in 2018). Multivariate analysis showed that characteristics of unmarried (compared with married, OR=2.482, 95% CI:1.140-5.402), gays (compared with heterosexual, OR=3.163, 95% CI:1.543-6.483), cases with high-risk transmission (compared with other cases, OR=7.631, 95% CI:1.783-32.654), confirmed in Nanhu and Pinghu districts of Jiaxing (compared with other districts, OR=2.225, 95% CI:1.074-4.608) were risks for entering the largest molecular cluster. There were seven suspected high-risk transmission MSM in the largest molecular cluster. The first debut of homosexual behavior was from 2010 to 2018, and the median number of gay partners was 20 ( P 25, P 75：10, 100) within two years before being diagnosed. Six reported a recent history of looking for gay partners in an MSM dating place in Nanhu district. Conclusions:The HIV-1 subtypes of newly confirmed HIV/AIDS were diverse, mainly sporadic in Jiaxing from 2017 to 2018. There were geographical aggregation characteristics and suspected some high-risk transmission cases, suggesting that rapid transmission and targeted intensive intervention are needed.

Objective To investigate the relationship between underweight and pulmonary function in the general population. Methods A total of 2 350 patients who underwent a pulmonary function examination at Chongqing Three Gorges Central Hospital from January to June 2019 were selected as the study subjects. The subjects were divided into three groups based on their BMI value including underweight (<18.5 kg/m²), normal weight (BMI between 18.5 kg/m2 and 25 kg/m²), and overweight and obese (≥25 kg/m²). Results Subjects in the overweight group had significantly worse biochemical indicators compared with underweight and normal weight subjects, but the frequency of strenuous exercise of the underweight subjects was significantly lower than that of the other two groups (P<0.001). Compared to the normal weight and overweight groups, the underweight group had lower level of forced expiratory volume in first second (FEV1), predicted FEV1(%), forced vital capacity (FVC), predicted FVC(%), and peak expiratory flow (PEF) (P<0.001), but higher level of FEV1/FVC, as well as predicted FEV1 (%)<80% and predicted FVC (%)<80%. Multivariate logistic regression model analysis showed that after adjusting for multiple confounding factors, the risk of reduced lung function in underweight group increased significantly, and the odd ratios were 2.10 (95%CI 1.98–2.21) and 4.90 (95%CI 4.62–5.18) for FEV1(%)<80% and FVC%<80%, respectively. Conclusion This study demonstrated that in the general population, the underweight was significantly associated with reduced lung function.

Objective To investigate the neurodevelopmental toxicity of ACR by studying the expression of DCX and GAP-43 in the hippocampal dentate gyrus of rats after maternal exposure to acrylamide. Methods Pregnant rats were randomly divided into low-dose ACR(4.5 mg/kg),medium-dose(9 mg/kg),high dose groups(18 mg/kg)and the control group(0 mg/kg),8 in each group,and were exposed to toxicant from gestation-al day 15 to postnatal day 13. All rats and their pups were killed on postnatal day 14. ABC immunohistochemistry was used to detect the expression of GFAP in the hippocampus of mother rats and offspring. Results Compared with the control group,the expression of DCX and GAP-43 in hippocampus dentate gyrus of the pregnant rats in middle and high dose groups was significantly decreased(P < 0.05). Conclusion ACR may interfere with the growth and development of neurons by reducing the expression of DCX and GAP-43.

Objective To explore the relationships among hope level, coping style and quality of life (QOL) in myasthenia gravis (MG) patients. Methods From September 2016 to September 2017, 139 MG patients of Shaoxing People's Hospital were selected by convenience sampling. The hope level, coping style and QOL of patients were investigated with the Herth Hope Index (HHI), Medical Coping Modes Questionnaire (MCMQ) and Quality of Life Questionnaire-Core 30 (QLQ-C30). Pearson correlation and multiple linear regression were used to analyze the correlations among them and influencing factors of QOL respectively. Results The total score of HHI, score of confrontation dimension, avoidance dimension, yield dimension of MCMQ and score of total QOL of MG patients was (35.85±3.14), (18.78±3.67), (15.82±2.37), (9.94±2.79) and (52.33±11.83) respectively. Correlation analysis showed the total score of HHI of MG patients was positively associated with the total score of total QOL (r=0.675, P<0.05); the confrontation coping style was positively associated with the total QOL (r=0.613, P<0.05); the yield coping style had a negative correlation with the total QOL (r=-0.582, P<0.05). Multiple linear regression analysis revealed the influencing factors of QOL of MG patients included the burden of medical expense, classification of Myasthenia Gravis Foundation of America (MGFA), total score of HHI and yield. Conclusions The QOL of MG patients is in a low level. The main influencing factors of QOL of patients involve the burden of medical expense, classification of MGFA, hope level and yield coping style.

[Objective] The present study aimed to determine the protective role of Melatonin (MT) against Acrylamide (AA)-induced testicular toxicity and the potential molecular mechanism.[Methods] The animals were randomly divided into three groups,the control group (n =12),the AA group (n =12) and the AA+MT group (n =12).The rats in the AA and AA + MT group were gavaged with AA at a dose of 15 mg/(kg · day) for 4 consecutive weeks.After 3 weeks of AA treatment,MT was intraperitoneally injected 30 minutes before AA treatment at 10 mg/(kg· day) for 1 week in the AA + MT rats.Subsequently,the mitochondrial membrane potential measurement,TUNEL assay,Western blot and electron microscopic techniques were applied in the present study.[Results] The results showed that AA could decrease the testis mitochondrial membrane potential (P ＜ 0.05) which could be recovered by MT (P ＜ 0.05).Moreover,MT induced down-regulation of Bax expression and up-regulation of Bcl-2 expression in the testis,compared with AA rats.The amelioration of testicular apoptosis was further confirmed by the TUNEL labeling.Western blot results suggested that the decreased ratios of Bcl-2/Bax and Bcl-xL/Bak in the AA group (both P ＜ 0.05) could be recovered by MT treatment (both P ＜ 0.05).The levels of Cyt-c,Casp-3,p53 and NF-κB in AA group were markedly elevated compared with the control (all P ＜ 0.05),and reduced in MT treatment group (all P ＜ 0.05).MT could relieve abnormal mitochondrial structures in the seminiferous tubule in the electron microscopic level.[Conclusion] MT may exert productive effect through its anti-apoptotic properties associated with mitochondria.

In order to reform the medical talent evaluation system, establish evaluation systems of physician competency, and implement physician resources management systems according to work position, and the compensa-tion system which reflects the value of medical services, The basic principles and standards of different physician tiers and grades are created in Shenzhen based on literature review, expert consultation and the methods from the American Centers for Medicare and Medicaid Services ( CMS) . Some results have achieved, including medical competency as-sessment of a certain number of physicians in the pilot project ( the coincidence rate of special hospitals is higher than general hospitals, respectively 78. 9% and 44. 8% ), comprehensive personnel systems reforms in public hospi-tals, and the trial selection of medical talents. The paper also provides some implications:The cognition of all sectors of society and physician themselves should be improved, Transitional policies for position recruitment and performance pay needs further improvement. Meanwhile, the grade evaluation system of non-physicians must also be given greater attention.