Research progress of miRNA in exosomes in the repair of diabetic foot ulcer / 中国糖尿病杂志

Diabetic foot ulcer(DFU)is a serious complication of diabetes mellitus.The miRNA carried by exosomes(Exos)is an important regulator of angiogenesis during wound closure in DFU,playing a crucial role in regulating the progression of DFU.This article reviews the research progress on the mechanism of miRNA in Exos in DFU repair.

Research on improvement of multi-source therapy equipment management mode based on total normalized productive maintenance theory / 中国医学装备

Objective:To establish a total normalized productive maintenance(TnPM)model for medical equipment,and to explore its application value in the management of multi-source treatment equipment.Methods:In accordance with the principles of self-management,economic efficiency and dynamic improvement,the TnPM management mode of the medical equipment lifecycle management system was developed.22 multi-source treatment equipment in clinical use in the of department of burn and plastic surgery of The Second Affiliated Hospital of Air Force Medical University were selected and divided into a control group(16 units)and an observation group(18 units,including 12 of control group and 6 newly added units)according to different management modes.The control group implemented the traditional management mode,and the observation group adopted TnPM management mode.The operation quality,comprehensive efficiency and team management capabilities of the two groups were compared.Results:The equipment failure rate of the observation group was(4.82±0.21)%,which was lower than that of traditional group,the self-repair rate,maintenance rate and operating standard rate were(91.63±3.59)%,(96.60±2.47)%and(97.31±1.54)%,respectively,which were higher than those of the control group,the difference was statistically significant(t=2.434,5.246,4.525,5.311,P<0.05).The equipment availability rate,performance index and quality index of the observation group were(90.82±2.78)%,(97.03±2.24)%and(97.85±1.26)%,respectively,which were higher than those of control group,the difference was statistically significant(t=6.231,4.671,5.997,P<0.05).The assessment scores of the personnel involved in the equipment on job responsibilities,basic equipment theory,usage assurance level and management performance of observation group were(93.95±2.81)points,(91.45±2.47)points,(90.75±2.54)points and(93.08±3.34)%,respectively,which higher than those of the control group,the difference was statistically significant(t=2.831,3.979,6.472,4.001,P<0.05).Conclusion:The TnPM management mode can improve the operation quality of equipment in the treatment of clinical patients,reduce the incidence of failure,enhance the comprehensive efficiency of equipment and clinical service level,and promote the construction of a management team.

Gut microbiota and immune mechanism of type 1 diabetes mellitus / 中华内分泌代谢杂志

Type 1 diabetes mellitus is a T-cell-mediated autoimmune disease that commonly affects adolescents, characterized by progressive destruction of pancreatic β-cells, absolute insulin deficiency, and hyperglycemia. The pathogenesis of type 1 diabetes mellitus is complex and is believed to be mainly associated with immunity, environment, and genetics. There is increasing evidence that gut microbiota is closely related to the occurrence of type 1 diabetes mellitus. This article focuses on the immune mechanisms and roles of gut microbiota and its derivatives in the development of type 1 diabetes mellitus from the perspectives of innate and adaptive immunity. Additionally, it introduces therapeutic approaches targeting gut microbiota for the treatment of type 1 diabetes mellitus.

Influencing factors of adaptive ability development of children aged 2 - 6 in China / 中国儿童保健杂志

【Objective】 To investigate the development of adaptability in children aged 2 - 6, and to explore its influencing factors, so as to provide reference for promoting the development of adaptability in young children. 【Methods】 Data were from the National Nutrition and Health Systematic Survey for Children in China, and 3 319 children aged 2 - 6 and their parents from 28 sites across 14 provinces were recruited in this study.The Development Scale for Children Aged 0 - 6 years (WS/T 580-2017) was used to measure the developmental quotient of children′s adaptive ability, and a survey questionnaire was used to collect relevant information about children and their parents. 【Results】 Among 3 319 children aged 2 - 6, the proportion of slightly low or low level of adaptability, moderate adaptability development, good and excellent adaptability development was 7.68%,66.25% and 26.06%, respectively.The proportion of children aged 5 - 6 with good and excellent adaptability was lower in 3-year-old and 4-year-old groups (χ2=59.29, P<0.05).Multiple stepwise linear regression showed that children′s gender (β=0.06), gestational age of birth (β=-0.05), only child (β=-0.04), left-behind child (β=-0.04), the main caregiver (β=-0.06), and the education level of parents (β=0.09, 0.10), whether parents actively pay attention to children′s emotions (β=-0.06) and whether children play with homemade toys (β=-0.04) were the influencing factors of children′s adaptive development quotient.Girls, full-term children, only children, non-left-behind children, children with parents as main caregivers, parents with a high level of education, parents who often take the initiative to pay attention to children′s emotions, and children who play with homemade toys had a higher level of adaptability development quotient. 【Conclusions】 The development level of adaptability in children aged 2 - 6 in China is mostly above the average level and is related to multiple factors.Targeted intervention work can be carried out on relevant factors in order to promote the development of children′s adaptability.

Survey on nutrition awareness and its influencing factors among parents of preschool children / 中华全科医师杂志

Objective:To survey the awareness status and its influencing factors among parents of preschool children.Methods:Data was collected from the National Nutrition and Health Systematic Survey for 0-18 Year Children in China. A total of 2 625 children aged 3-5 years and their parents living in northern and southern regions of China were randomly selected by multi-stage stratified cluster sampling. The physical measurements were performed for the children, including height and weight; and the body mass index (BMI) and age-for-BMI Z-score (BAZ) were calculated. The questionnaire survey was conducted for the parents, including the demographic characteristics of parents and their children, the perception of their child′s nutritional status (overweight/obesity, normal, wasting) etc. According to WHO standards, the nutritional status of the children was classified as wasting, normal and overweight/obesity. The awareness of parents on their children′s nutritional status was classified as underestimated, correct, overestimated and unclear. Parents′ inability to correctly judge children′s nutritional status was defined as cognitive bias, including underestimation bias and overestimation bias. Multivariate logistic regression model was used to analyze the influencing factors of parents′ underestimation or overestimation of children′s nutritional status.Results:Among 2 625 enrolled preschool children, there were 1 312 boys (50.0%) and 1 313 girls (50.0%); and 648 (24.7%), 944 (36.0%) and 1 033 (39.3%) children aged 3, 4 and 5 years, respectively. One parent (mother, farther or others) of each child was selected for survey, and most of them were mothers (1 998(76.1%)). The prevalence rate of overweight/obesity and wasting was 10.3% (270/2 625) and 1.4% (38/2 625), respectively; and 2 317 children (88.3%) were normal. Among all parents surveyed, 1 766 (67.3%) were correct about their children′s nutritional status (correct group), 612 (23.3%) underestimated their children′s nutritional status (underestimated group), 213 (8.1%) overestimated their children′s nutritional status (overestimated group) and 34 (1.3%) were not aware of their children′s nutritional status (unclear group). The multivariate logistic regression analysis showed that girls ( OR=0.817, 95% CI: 0.678-0.984), living in rural areas ( OR=0.801, 95% CI: 0.662-0.969), large birth weight of child ( OR=0.639, 95% CI: 0.420-0.970) were protective factors for parents underestimating children′s nutritional status. Living in the northern region ( OR=1.698, 95% CI: 1.260-2.290), large birth weight of children ( OR=1.826, 95% CI: 1.149-2.902), father with overweight/obesity ( OR=1.467, 95% CI: 1.089-1.977) and maternal overweight/obesity ( OR=1.778, 95% CI: 1.308-2.417) were the risk factors for parents to overestimate the nutritional status of children. Conclusions:The survey shows that parents of preschool children have a relatively high cognitive bias on the nutritional status of their children. Parents of girls, living in rural areas or having child with large birth weight are less likely to underestimate the nutritional status of children; parents living in northern regions, having a child with large birth weight, or with overweight/obese are likely to overestimate the nutritional status of children.

Testosterone Deficiency Promotes Hypercholesteremia and Attenuates Cholesterol Liver Uptake via AR/PCSK9/LDLR Pathways.

Background: Testosterone deficiency is reportedly correlated with an elevation of cholesterol in plasma, but the mechanism remains unclear. Our objective was to investigate the effects of testosterone deficiency on cholesterol metabolism and the corresponding molecular changes in vivo and in vitro. Methods: SD rats were randomized into three groups: sham-operated (SHAM), subtotal orchiectomized (SO), and orchiectomized (ORX) and fed for 8 weeks. HepG2 cells were cultured with medium containing testosterone with the final concentrations of 0, 10, 30, and 300 nM. Method of isotope tracing and fluorescence labelling was adopted to investigate cholesterol metabolism. Several key molecules of cholesterol metabolism were also analyzed. Results: SO and ORX rats displayed dysfunctional liver uptake of cholesterol. HepG2 cells incubated with testosterone of lower and excessive level exhibited reduced capacity of cholesterol uptake. Further investigation revealed that lack of testosterone induced increased proprotein convertase subtilisin/kexin type 9 (PCSK9) and decreased low-density lipoprotein receptor (LDLR) both in vivo and in vitro. Moreover, the androgen receptor (AR) antagonist flutamide mimicked the effects of testosterone deficiency on PCSK9 and LDLR indicating the role of AR as a mediator in triggering attenuating liver cholesterol uptake in which testosterone instead of dihydrotestosterone (DHT) is the major functional form of androgen. Conclusion: Testosterone deficiency attenuated cholesterol liver uptake mediated by the PCSK9-LDLR pathway, in which AR and testosterone without transforming to DHT play important roles.

Application of early intervention pulmonary rehabilitation in emergency-ward linkage under multi-disciplinary team mode in patients with acute exacerbation of chronic obstructive pulmonary disease / 中国实用护理杂志

Objective:To explore the application effect of early intervention of pulmonary rehabilitation management in emergency department-ward linkage under multi-disciplinary team (MDT) mode in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD).Methods:Using convenient sampling method, 124 AECOPD patients admitted to Department of Emergency of Qilu Hospital of Shandong University (Qingdao) were selected as the study objects. According to the admission order, 62 patients admitted from March to October 2020 were taken as the control group, and 62 patients admitted from March to October 2021 were taken as the observation group. The control group was given routine treatment and rehabilitation guidance. On the basis of this, the observation group received the early lung rehabilitation management of emergency-ward linkage under MDT mode. The arterial oxygen saturation, lung function index (FEV 1, FEV 1%Pred, FEV 1/FVC), 6-minute walk test (evaluation only after intervention) and quality of life of patients were evaluated before and after intervention. Results:Finally, 60 patients in each group completed the study. After the intervention, the arterial oxygen saturation, the score of quality of life, 6-minute walk test and FEV 1, FEV 1%Pred, FEV 1/FVC of patients in observation group were 0.93 ± 0.04, (29.68 ± 4.87) points, (341.93 ± 46.55) m, and (1.86 ± 0.68) L, (66.13 ± 8.96)%, (68.2 ± 58.53)%, respectively. And in the control group, they were 0.91 ± 0.04, (35.83 ± 2.94) points, (268.75 ± 50.78) m, and (1.50 ± 0.66) L, (61.70 ± 7.16)%, (64.10 ± 8.42) %, respectively. The observation group was significantly better than the control group ( t values were -8.23 to 8.37, all P<0.01). Conclusions:Early intervention of pulmonary rehabilitation by emergency-ward linkage under MDT mod can effectively improve arterial oxygen saturation, pulmonary function, exercise ability and quality of life of patients with AECOPD.

Gene mutation types and clinical characteristics of children with G6PD deficiency in Zunyi area / 中华地方病学杂志

Objective:To study the types of pathogenic gene mutations and their main clinical characteristics in children with glucose-6-phosphate dehydrogenase (G6PD) deficiency in Zunyi area.Methods:Children with clinical manifestations of "yellow staining" or "suspected yellow staining" who were admitted to Guizhou Children's Hospital, Affiliated Hospital of Zunyi Medical University, from September 13, 2018 to September 13, 2020 were selected for G6PD gene mutation detection by multicolor probe melting curve analysis, and the pathogenic gene mutation types and clinical characteristics of children with G6PD deficiency were analyzed.Results:The results of G6PD gene mutation detection showed that among the 1 740 children tested, 119 were positive for gene mutation, and the positive detection rate was 6.84%. The proportion of male infants was higher than that of female infants, and the difference was statistically significant (91 males and 28 females, χ 2 = 15.10, P < 0.001); infancy accounted for 63.87% (76/119), and early childhood accounted for 18.49% (22/119). A total of 11 known pathogenic gene mutation types and 1 unknown mutation were detected. Among the top 4 pathogenic gene mutations, the overall was c.1024 C>T, c.1376 G>T, c.1388 G>A and c.95 A>G, male was c.1376 G>T, c.1388 G>A, c.1024 C>T and c.95 A>G; female was c.1024 C>T, c.95 A>G, c.1388 G>A and c.519 C>T. Among the 119 children with G6PD gene mutation, 90 cases had varying degrees of jaundice, including 36 cases of severe and more severe jaundice (including 2 cases of extremely severe neonatal bilirubin encephalopathy), and 54 cases of mild to moderate jaundice; 37 cases had anemia of different degrees, including 6 cases of mild anemia, 12 cases of moderate anemia, and 19 cases of severe or more severe anemia (including 1 case of extremely severe anemia). Conclusions:There are 12 types of gene mutations in children with G6PD deficiency in Zunyi area, and the most common mutation types are c.1024 C>T, c.1376 G>T, c.1388 G>A and c.95 A>G. Children with G6PD deficiency are often accompanied by varying degrees of jaundice and anemia.

Validation and invalidation of SARS-CoV-2 main protease inhibitors using the Flip-GFP and Protease-Glo luciferase assays

SARS-CoV-2 main protease (Mpro) is one of the most extensive exploited drug targets for COVID-19. Structurally disparate compounds have been reported as Mpro inhibitors, raising the question of their target specificity. To elucidate the target specificity and the cellular target engagement of the claimed Mpro inhibitors, we systematically characterize their mechanism of action using the cell-free FRET assay, the thermal shift-binding assay, the cell lysate Protease-Glo luciferase assay, and the cell-based Flip-GFP assay. Collectively, our results have shown that majority of the Mpro inhibitors identified from drug repurposing including ebselen, carmofur, disulfiram, and shikonin are promiscuous cysteine inhibitors that are not specific to Mpro, while chloroquine, oxytetracycline, montelukast, candesartan, and dipyridamole do not inhibit Mpro in any of the assays tested. Overall, our study highlights the need of stringent hit validation at the early stage of drug discovery. Graphical abstract O_FIG O_LINKSMALLFIG WIDTH=200 HEIGHT=118 SRC="FIGDIR/small/458041v1_ufig1.gif" ALT="Figure 1"> View larger version (41K): org.highwire.dtl.DTLVardef@b0c310org.highwire.dtl.DTLVardef@d652deorg.highwire.dtl.DTLVardef@da8d0corg.highwire.dtl.DTLVardef@62449b_HPS_FORMAT_FIGEXP M_FIG C_FIG Flip-GFP and Protease-Glo luciferase assays, coupled with the FRET and thermal shift binding assays, were applied to validate the reported SARS-CoV-2 Mpro inhibitors.

Economic evaluation of fifteen cervical cancer screening strategies in rural China / 中华妇产科杂志

Objective@#To evaluate the feasible cervical cancer screening strategies in rural China.@*Methods@#The study was based on the health industry scientific research project of National Health Commission in 2015, cervical cancer screening technology and demonstration research suitable for rural areas in China, we collected health economics and epidemiological parameters and established the unscreening model and screening model with Treeage Pro 2011 software. Combining with the data acquired from site investigation, including population screening, treatment-related clinical materials and cost data, we simulated the occurrence and the development of cervical cancer of rural women in China under different screening and intervention programs and predicted the screening effects [cumulative incidence, cumulative risk of disease, life years and quality adjusted life years (QALY) , gains] and costs after 20 years, and using health economic evaluation analysis (cost-effectiveness analysis, cost-utility analysis, cost-benefit analysis). Screening programs included five screening strategies [visual inspection with acetic acid/lugol's iodine (VIA/VILI), careHPV, ThinPrep cytology test (TCT), careHPV+TCT, careHPV+VIA/VILI] and three screening intervals (1-year, 3-year, 5-year), a total of fifteen screening programs.@*Results@#Compared with no screening, fifteen screening programs reduced the cumulative incidence by 22.65%-51.76%. Compared with TCT or VIA/VILI, for the same screening interval, the reduced cumulative incidence, the amounts of life-year saved and QALY and benefits gained of careHPV were the highest. The cost-effectiveness ratios of these screening programs ranged (0.44-3.24)×104 Yuan per life-year saved, cost-utility ratios ranged (0.15- 1.01)×104 Yuan per QALY, benefit-cost ratios ranged 7.73-59.10. The results of incremental costeffectiveness ratios showed that VIA/VILI every five years, VIA/VILI every three years, careHPV every five years, careHPV every three years and careHPV every year were dominant programs.@*Conclusions@#VIA/VILI screening is cost-effective, careHPV is slightly more expensive but more effective. In rural China, careHPV screening every five years could be recommended. This study provides a basis for the determination of cervical cancer screening methods feasible for rural areas in China.

Study on the influence of psychological empowerment on the innovation ability of nurses in operating room / 中国实用护理杂志

Objective@#To investigate the status of psychological empowerment and innovation ability of nurses in operating room, analyze the influence of psychological empowerment of nurses in operating room on innovation ability, and provide reference for improving the innovation ability of nurses in operating room.@*Methods@#A total of 220 nurses in the operating room of Qingdao City, Shandong Province were selected and investigated using the psychological authorization scale and the innovation ability evaluation scale.@*Results@#The average score of psychological empowerment of nurses in the operating room was 3.61±0.55, and the average score of innovation ability of nurses was 3.09±0.27. The psychological empowerment of nurses was positively correlated with the ability of innovation (P<0.05). Hierarchical regression analysis showed that the three dimensions of work significance, self-efficacy and autonomy in psychological empowerment could independently explain 23.7% variation of innovation ability.@*Conclusions@#Managers should improve the quality of operating room care services for the operating room nurses in an environment that facilitates psychological empowerment, proper authorization, and reasonable authorization to enhance the innovative ability of the operating room nurses.

Study on the influence of psychological empowerment on the innovation ability of nurses in operating room / 中国实用护理杂志

Objective To investigate the status of psychological empowerment and innovation ability of nurses in operating room, analyze the influence of psychological empowerment of nurses in operating room on innovation ability, and provide reference for improving the innovation ability of nurses in operating room. Methods A total of 220 nurses in the operating room of Qingdao City, Shandong Province were selected and investigated using the psychological authorization scale and the innovation ability evaluation scale. Results The average score of psychological empowerment of nurses in the operating room was 3.61±0.55, and the average score of innovation ability of nurses was 3.09±0.27. The psychological empowerment of nurses was positively correlated with the ability of innovation (P<0.05). Hierarchical regression analysis showed that the three dimensions of work significance, self-efficacy and autonomy in psychological empowerment could independently explain 23.7% variation of innovation ability. Conclusions Managers should improve the quality of operating room care services for the operating room nurses in an environment that facilitates psychological empowerment, proper authorization, and reasonable authorization to enhance the innovative ability of the operating room nurses.

Effect of sex hormone levels on macrovascular complications in community-dwelling male patients with diabetes mellitus in Shanghai / 中华内分泌代谢杂志

Objective We aimed to investigate whether sex hormone levels including total testosterone, estradiol, estradiol/total testosterone, and dehydroepiandrosterone ( DHEA ) were associated with macrovascular complications among Shanghai community-dwelling diabetic men. Methods Relying on the Environmental Pollutant Exposure and Metabolic Diseases in Shanghai (METAL) study (ChiCTR1800017573, www.chictr.org.cn), 2147 male diabetic participants were recruited from 10 communities. Carotid plaques and common carotid artery ( CCA) diameters were detected by carotid ultrasound. Cardiovascular disease ( CVD) was defined as a self-reported diagnosis of CVD, including coronary heart disease, myocardial infarction, or stroke. Results ( 1) The prevalence of CVD in this study was 36. 0％, and patients with CVD had higher rates of hypertension and dyslipidemia than those without CVD. ( 2) After controlling for multiple factors, serum DHEA levels were negatively correlated with the prevalence of CVD while estradiol levels were positively correlated with both the prevalences of CVD and carotid plaque, estradiol/total testosterone ratio was also positively correlated with the prevalence of CVD. ( 3) In subgroup with unilateral/bilateral CCA plaque, and after controlling for multiple factors, total serum testosterone was negatively associated with the mean CCA diameter. Conclusion The incidence of macrovascular complications was lower in male diabetic patients with higher serum total testosterone and DHEA levels and lower estradiol levels, suggesting that sex hormone levels may be a window for the diagnosis and treatment of diabetic macrovascular complications.

Economic evaluation of fifteen cervical cancer screening strategies in rural China / 中华妇产科杂志

Objective To evaluate the feasible cervical cancer screening strategies in rural China. Methods The study was based on the health industry scientific research project of National Health Commission in 2015, cervical cancer screening technology and demonstration research suitable for rural areas in China, we collected health economics and epidemiological parameters and established the unscreening model and screening model with Treeage Pro 2011 software. Combining with the data acquired from site investigation, including population screening, treatment-related clinical materials and cost data, we simulated the occurrence and the development of cervical cancer of rural women in China under different screening and intervention programs and predicted the screening effects [cumulative incidence, cumulative risk of disease, life years and quality adjusted life years (QALY), gains] and costs after 20 years, and using health economic evaluation analysis (cost-effectiveness analysis, cost-utility analysis, cost-benefit analysis). Screening programs included five screening strategies [visual inspection with acetic acid/lugol's iodine (VIA/VILI), careHPV, ThinPrep cytology test (TCT), careHPV+TCT, careHPV+VIA/VILI] and three screening intervals (1-year, 3-year, 5-year), a total of fifteen screening programs. Results Compared with no screening, fifteen screening programs reduced the cumulative incidence by 22.65%-51.76%. Compared with TCT or VIA/VILI, for the same screening interval, the reduced cumulative incidence, the amounts of life-year saved and QALY and benefits gained of careHPV were the highest. The cost-effectiveness ratios of these screening programs ranged (0.44-3.24)×104 Yuan per life-year saved, cost-utility ratios ranged (0.15-1.01)×104 Yuan per QALY, benefit-cost ratios ranged 7.73-59.10. The results of incremental cost-effectiveness ratios showed that VIA/VILI every five years, VIA/VILI every three years, careHPV every five years, careHPV every three years and careHPV every year were dominant programs. Conclusions VIA/VILI screening is cost-effective, careHPV is slightly more expensive but more effective. In rural China, careHPV screening every five years could be recommended. This study provides a basis for the determination of cervical cancer screening methods feasible for rural areas in China.

A review of androgen in polycystic ovary syndrome with nonalcoholic fatty liver disease / 中华内分泌代谢杂志

A growing number of studies have suggested that androgen in women with polycystic ovary syndrome (PCOS) exists a significant impact on the development of non-alcoholie fatty liver disease (NAFLD).We should pay more attention to the metabolism and function of androgens in PCOS women,as well as the effect and mechanism of androgens on NAFLD progression in PCOS women.This article briefly reviews and comments on this issue.

Criminal fold priority separating reduces splenic injury in laparoscopic radical gastrectomy / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To explore the value of criminal fold priority separating (CFPS) in reduction of iatrogenic splenic injury in laparoscopic radical gastrectomy.</p><p><b>METHODS</b>Complete videos of 270 patients undergoing laparoscopic radical gastrectomy in Guangdong Provincial Hospital of Chinese Medicine were reviewed. Anatomic features of criminal fold (CF) were summarized. The relationship between CFPS and iatrogenic splenic injury was examined. CF was defined as the ligament between omentum and spleen. CFPS was defined as that CF was separated before the left half gastrocolic omentum was dissected. Splenic injury was further compared between CFPS group and non-CFPS group.</p><p><b>RESULTS</b>CF occurred in 81.5% cases (220/270), presenting one bunch or multiple bunches. CF appeared most commonly in the lower pole of spleen (76.7%, 207/270), then in middle spleen (14.1%, 38/270) and upper pole (9.6%, 26/270). CFPS was performed in 20% cases (54/270) and 80% cases (216/270) were non-CFPS. The incidence of iatrogenic splenic injury was 11.1% (30/270), and this incidence of CFPS group was lower as compared to non-CFPS group (3.7%, 2/54 vs. 13.0%, 28/216), but the difference was not significant (P=0.07). Of 30 patients with splenic injury, 24(80%) were due to traction of CF and all were in non-CFPS group. Instrument injury occurred in 20% cases(6/30) and 2 were in CFPS group and 4 were in non-CFPS group. Most iatrogenic splenic injuries were successfully handled with electrocoagulation, adhesive and compression, except 2 patients underwent open splenectomy for serious splenic injury in non-CFPS group.</p><p><b>CONCLUSION</b>In laparoscopic surgery for gastric cancer, iatrogenic splenic injury mostly results from improper traction of CF and CFPS can reduce the incidence of iatrogenic splenic injury.</p>

Effect of transplantation of human amniotic mesenchymal stem cells on the lung tissue pathologic change in paraquat induced pulmonary fibrosis rats / 实用医学杂志

Objective To investigate the impact of transplantation of human amniotic mesenchymal stem cells(hAMSCs)on the histopathological change in paraquat-induced pulmonary fibrosis in rats. Methods Forty-six female SD rats were randomly divided into the sham surgery group and the hAMSCs transplant group. Pulmonary fibrosis model was induced by 2％ of paraquat intragastric administration(100 mg/kg/rat). hAMSCs were injected through caudal vein(2 × 106 cells/mL/rat). The histopathological changes were observed through microscopy after HE and the immunohistochemical staining. Results General conditions in rats received hAMSCs transplantation were better than those of the model rats. More large area and white fibrosis nidus were observed in bilateral lung of model rats,with less dispersal spot or nidus. The construction of lung tissue was disordered in the model rats. The thickness of alveolar wall was found increased. There were large area interstitial hyperplasia and a large number of inflammatory cells infiltrations. The construction of lung tissue was apparently improved. A majority of alveolar wall was monolayer cell. There were only less and small area with interstitial hyperplasia. Inflammatory cell infiltration was significantly decreased. The anti-human nucleus specific antibody positive hAMSCs were observed planted and survived in lung interstitial tissue. And few hAMSCs were observed planted in alveolar wall. Conclusion The transplanted hAMSCs can be planted and survived in lung tissue ,and may play a therapeutic role in araquat-induced pulmonary fibrosis.

Synthesis and preliminary anti-tumor activity of novel ursolic acid derivative-chalcone conjugates / 中国药科大学学报

Ten novel conjugates with ursolic acid core and different chalcone ligands were synthesized via esteri-fication using the natural ursolic acid as starting material. The structures of these conjugates were confirmed by 1 H NMR, 13 C NMR and HRMS. The preliminary biological results showed that these compounds displayed signifi-cant antiproliferative effect on CNE2, KB, MCF-7, A549 and HepG2 cells. These compounds were more effective than ursolic acid and tamoxifen against MCF-7 cells. Especifically, compound 11e ( IC50 =4. 7 μmol/L) showed the greatest potency against MCF-7, which was about 3-times more potent than tamosifen ( IC50 =15. 2 μmol/L) . Additionally, all conjugates were nontoxic to health MCF-10A and VERO cells, and had higher security than tamoxifen.

Orthotopic transplantation of human amniotic mesenchymal stem cells for treatment of cerebral infarction in rats / 中国组织工程研究

BACKGROUND: Preliminary experimental study found that the human amniotic mesenchymal stem cells (hAMSCs)transplantation can improve nerve injury symptoms of rats with cerebral infarction.OBJECTIVE: To observe the survival, colonization and differentiation of hAMSCs in the infarct area of cerebralinfarction rats.METHODS: Sixty Sprague-Dawley rats were randomly assigned into hAMSCs transplantation, model or shamoperation groups (n=20/group). Animal models of middle cerebral artery occlusion were produced in the model andtransplantation groups by Zea-Longa method. One day after modeling, rats in the hAMSCs transplantation groupwere given in situ transplantation of 10 μL of hAMSCs (2×106) into the damaged striatum and cortex, while those inthe model and sham operation group were given the same volume of PBS. Within 1 week after transplantation, ratneurological defects were assessed and changes in their body mass were continuously monitored. Two weeks aftertransplantation, TTC staining was used to observe cerebral infarct size, hematoxylin-eosin staining was used forpathological observation of brain tissues, and immunofluorescent staining was used to detect expression ofneuron-specific nuclear protein.RESULTS AND CONCLUSION: With time, weight loss was increased while neurologic deficit scores were graduallyreduced in the hAMSCs and model groups. Compared with the model group, the weight loss and neurologic deficitscores were lower in the hAMSCs group,; however, there was a significant difference in the neurologic deficit scoresbut not in the weight loss between the two groups. Additionally, the hAMSCs significantly reduced infarct size,attenuated pathologic injury, and decreased the number of inflammatory cells. Immunofluorescence stainingshowed that the hAMSCs were observed at 1 week after transplantation under inverted luorescence microscope,and gradually differentiated into nerve cells at 2 weeks after transplantation. In conclusion, transplanted hAMSCsmay migrate to and survive in the cerebral infarct region, and differentiate into nerve cells in situ in rats with cerebralinfarction.

Effect of transplantation of human amniotic mesenchymal stem cells on the lung tissue pathologic change in paraquat induced pulmonary fibrosis rats / 实用医学杂志

Objective To investigate the impact of transplantation of human amniotic mesenchymal stem cells(hAMSCs)on the histopathological change in paraquat-induced pulmonary fibrosis in rats. Methods Forty-six female SD rats were randomly divided into the sham surgery group and the hAMSCs transplant group. Pulmonary fibrosis model was induced by 2％ of paraquat intragastric administration(100 mg/kg/rat). hAMSCs were injected through caudal vein(2 × 106 cells/mL/rat). The histopathological changes were observed through microscopy after HE and the immunohistochemical staining. Results General conditions in rats received hAMSCs transplantation were better than those of the model rats. More large area and white fibrosis nidus were observed in bilateral lung of model rats,with less dispersal spot or nidus. The construction of lung tissue was disordered in the model rats. The thickness of alveolar wall was found increased. There were large area interstitial hyperplasia and a large number of inflammatory cells infiltrations. The construction of lung tissue was apparently improved. A majority of alveolar wall was monolayer cell. There were only less and small area with interstitial hyperplasia. Inflammatory cell infiltration was significantly decreased. The anti-human nucleus specific antibody positive hAMSCs were observed planted and survived in lung interstitial tissue. And few hAMSCs were observed planted in alveolar wall. Conclusion The transplanted hAMSCs can be planted and survived in lung tissue ,and may play a therapeutic role in araquat-induced pulmonary fibrosis.