The present study was designed to investigate the effects of cytochalasin E(CE) on the integrity of Sertoli cell barrier. The results indicate that: (1) In the CE-treated testis(1000-2000 ?mol/L CE/testis, 6-14 hr), actin filaments of the ectoplasmic specialization (ES) in area of Sertoli cell barrier were disrupted, the accumulation of amorphous material and fragmented small vesicles of SER were observed in cytoplasm of Sertoli cell. The above changes appeared to be dosage and duration dependent; (2)In the seminiferous tubules of animals receiving CE (1000-2000 ?mol/L testis, 6-14 hr) plus fixation with 10% hypertonic dextrose solutions, usually the germ cells shrinkage and exaggeration of intercellular spaces withint he basal as well asthe adluminal compartments were observed. The tight junction between Sertoli cells were also appeared to be separated by hypertonic action of dextros; (3) The results of tracing experiments showed that lanthanums as tracer could be seen to pass through the Sertoli-Sertoli cell junction of the barrier and enter into the adluminal compartment, the tracer that surrounding the spermatocytes and round spermatids were discernible readily. The above results suggest that cytochalsin E disturbed actin filaments of Sertoli ectoplasmic specialization thus altered the functional integrity of the Sertoli cell barrier. The relationship between the actin filaments and Sertoli cell barrier was discussed.

Objective:To evaluate the changes in the blood-cerebrospinal fluid barrier in postoperative delirium rats.Methods:One hundred and forty-seven healthy female Sprague-Dawley rats, aged 3 months, weighing 240-300 g, were divided into 3 groups ( n=49 each) using a random number table method: control group (group C), anesthesia group (group A) and postoperative delirium group (group P). Group C received no treatment.Group A received 2-h anesthesia with 1.4% isoflurane.Group S underwent an exploratory laparotomy under 1.4% isoflurane anesthesia.The behaviors of rats in each group were tested at 24 h before surgery and 6, 9 and 24 h after surgery using buried food test, open field test and Y maze test.Sodium fluorescence was injected through the tail vein at 6, 9 and 24 h after surgery.Then the rats were sacrificed, the choroid plexus (CP) was obtained, and cerebrospinal fluid (CSF) of bilateral cerebral ventricles was collected, and the expression of ZO-1, occludin, claudin1, E-cadherin and VE-cadherin in CP was detected using Western blot.FITC-dextran 10, 40 and 70 kDa was injected through the tail vein at 6 h after surgery, and then CSF was collected for determination of the concentrations of NaFI, 10, 40 and 70 kDa fluorescein isothiocyanate labeled dextran (FITC-dextran) in CSF by fluorescence spectrophotometry.CP was obtained to observe the morphology of choroid plexus epithelial cells (CPECs) of bilateral cerebral ventricles with a transmission electron microscope. Results:Compared with group C and group A, the latency to eat food in buried food test was significantly prolonged, the time of staying at the central region was shortened, the percentage of the number of entries into novel arm and percentage of time of staying at novel arm in Y maze test were decreased, the freezing time in open field test was shortened, the expression of ZO-1, occludin and claudin1 in CP was down-regulated, the concentrations of NaFI and 10 kDa and 40 kDa FITC-dextranin CSF were increased ( P<0.05 or 0.01), the CPECs arranged at random and loose, the microvilli of CPECs were absent, the tight junction was blurred, and the gap became wider in group P. Conclusion:The occurrence of postoperative delirium is related to the change in blood-cerebrospinal fluid barrier.

[ ABSTRACT] AIM: To investigate the differential expression of human leukocyte antigen-G ( HLA-G) isoforms and its receptors in human monocyte line THP-1 after human cytomegalovirus ( HCMV) infection for exploring the role of HLA-G in HCMV escaping the immune response of the organism .METHODS: THP-1 cells were infected with HCMV Towne strain.The expression of HLA-G isoforms at mRNA and protein levels was determined by RT-PCR and Western blot, respectively.The surface expression of HLA-G and its receptors ILT2/ILT4 and the cell viability were analyzed by flow cytometry.The levels of soluble HLA-G (sHLA-G) and IL-10 were measured by ELISA.RESULTS:After infection of the THP-1 cells with HCMV , no obvious apoptosis in the cells was observed , and the viability of the cells was high .A significant up-regulation of HLA-G1,-G3,-G4 and-G5 at mRNA expression level 1 d after infection was found , while the protein expression of HLA-G1 and HLA-G5 isoforms was mainly detected .The expression of HLA-G/ILT2/ILT4 was evi-dently up-regulated 1 d after infection .The level of sHLA-G was significantly increased 1 d after infection as compared with control group (P<0.01).The expression of IL-10 was obviously up-regulated 1 d post-infection as compared with control group.CONCLUSION:The differential expression of HLA-G isoforms and secretion of the receptors ILT 2/ILT4 and IL-10 in the THP-1 cells are induced after HCMV infection .This study provides experimental evidence for evaluating the immune mechanism of HCMV infection .

Objective To investigate the initial manifestation and disease onset feature of systemic lupus erythematosus(SLE) in the past ten years in fifteen hospitals in Jiangsu Province.Methods Data was collected by the same Methodsin all the participated hospitals and then it was summarized for retrospective analysis.Two groups were compared by chi-square test.Results ① One thousand nine hundred and fifty eight patients were investigated and the male-to-female ratio was 1∶15.0.② One thousand seven hundred and ninty eight patients had clear initial manifestations.The most common initial manifestations were skin and mucosal lesions(769 cases,42.8％ ) and arthritis (697 cases,38.8％ ).The main skin lesion was malar rash (706 cases).Arthritis was found to be more common in female than male.③ All hospitalized patients at their first admission showed multiple organ/system involvement:the most common involvement was skin and mucous membrane (82.3％),hematologic damage (74.0％),in which at least one series of blood cells were involved,arthritis (1156 cases,56.5％ ) much more than myositis (51 cases),proteinuria 1046 cases and hematuria in 385 cases.Renal biopsy pathology showed type Ⅳ glomerulonephritis.Conclusion ① SLE patients are mainly female and the male to female ratio is 1∶15.0.② The most common initial manifestations are skin and mucosal lesions.③ The most commonly involved organ/system are skin and mucous membrane,blood,joint and kidney.The most common pathological changes shown in renal biopsy is type Ⅳ glomerulonephritis.

Objective:To observe the therapeutic effects of human umbilical cord mesenchymal stem cells (HUC-MSCs) on insulin resistance, and to investigate the molecular mechanisms in T2DM rats.Methods:The T2DM rats were induced by a high fat and high glucose diet for 10 weeks combined with low-dose streptozocin. Four weeks after infusion of HUC-MSCs via tail vein of the rats, fasting blood glucose, triglycerides, cholesterol were measured. Intraperitoneal glucose tolerance test, intraperitoneal insulin tolerance test and hyperinsulinemic-euglycaemic clamp test were performed to evaluate the islet function and insulin resistance level of rats. The protein expression levels of lipid metabolism signal pathway adenine monophosphate activated protein kinase (AMPK) and acetyl CoA carboxylase (ACC) in liver tissue were detected by western blot.Results:Compared with the T2DM group, HUC-MSCs treatment can significantly reduce fasting blood glucose, triglycerides, total cholesterol levels ( P<0.01), and the values of area under the curve of glucose tolerance and insulin tolerance ( P<0.05) in the T2DM+ HUC-MSCs group. Hyperinsulinemic-euglycaemic clamp test found that compared with the T2DM group, after HUC-MSCs treatment, the glucose infusion rate level was significantly higher in the T2DM+ HUC-MSCs group( P<0.01); Western blot showed that compared with the T2DM group, the ratio of p-AMPK to AMPK and p-ACC to ACC in liver tissues of T2DM+ HUC-MSCs group were significantly increased( P<0.01). Conclusion:Human umbilical cord mesenchymal stem cells treatment may improve lipid metabolism and insulin resistance by activating AMPK/ACC signaling pathways in type 2 diabetic rats.

Objective:The aim of this study is to analyze risk factors and perinatal outcomes of fetal growth restriction (FGR) in the third trimester to improve pregnancy outcomes.Methods:The retrospective study collected 676 fetus, included 338 FGR and 338 appropriate for gestational infants. All samples were collected between January 1st 2014 and January 1st 2016 from Fujian Provincial Maternity and Children's Hospital. Multivariate logistic regression analysis was used to analyze the risk factors and pregnancy outcomes of fetal growth restriction between FGR and control group.Results:⑴ Multivariate logistic regression analysis showed that the independent risk factor of FGR was severe preeclampsia for 28-33 + 6 weeks FGR. The independent risk factors of 37-40 + 6 weeks FGR were severe preeclampsia, oligohydramnios, velum attachment of cord and cord around neck. ⑵ Compared with the control group of the same gestational week, the fetal distress rate, 1 minute asphyxia rate of newborn and cesarean section rate of FGR in the 28-33 + 6 gestational week group were all higher than those in the same gestational week group ( P<0.05). ⑶ The fetal distress in FGR group was more than in cesarean delivery that in vaginal delivery at 28-33 + 6 weeks of gestation, and that in FGR group was more than that in vaginal delivery at 34-36 + 6 weeks of gestation ( P<0.05). Conclusions:Severe preeclampsia, oligohydramnios, velum attachment of umbilical cord and cord around the neck are the independent risk factors of FGR in the third trimester. During pregnancy, early intervention such as screening in high risk pregnant women and fetal intrauterine monitoring should be carried out to improve the perinatal outcome.

OBJECTIVE: To assess the value of copy number variations (CNVs) and chromosomal karyotyping analysis for patients with intellectual disability/developmental delay (ID/DD). METHODS: Chromosomal karyotype analysis was applied to 530 children diagnosed with ID/DD. Single nucleotide polymorphism array (SNP-array) was further applied for 120 children with unknown etiology. RESULTS: Among the 530 children with ID/DD, 104 (19.62%) were detected with chromosomal abnormalities. For the 120 children analyzed by SNP-array, 44 (36.67%) were detected with CNVs, among which 20 were predicted as pathogenic, 6 as likely pathogenic, 10 as variants of unknown significance, 7 as likely benign,and 1 as loss of heterozygosity. CONCLUSION SNP-array can facilitate delineation of the etiology of patients with ID/DD, which may provide a basis for their prognosis, consultation and clinical intervention.
Child ; Chromosome Aberrations ; DNA Copy Number Variations ; Developmental Disabilities/genetics* ; Humans ; Intellectual Disability/genetics* ; Karyotyping

Objective To investigate the interventional effect and mechanism of a novel ampe-lopsis hydrogel on dampness-heat accumulation syndrome of gouty arthritis.Methods A total of 90 patients with gouty arthritis who met the diagnostic criteria of western medicine and were differentiated as damp-heat accumulation syndrome of traditional Chinese medicine(TCM)were randomly divided into treatment group,control group and blank group,with 30 patients in each group.The blank group was treated with etoricoxib only,the control group was treated with etoricoxib combined with ampelop-sis hydrogel,and the treatment group was treated with etoricoxib combined with external application of ampelopsis hydrogel.The clinical efficacy,time to symptom improvement,safety,comfort,changes in syndrome scores of TCM,serum inflammatory factors[C-reactive protein(CRP),tumor necrosis factor-α(TNF-α),erythrocyte sedimentation rate(ESR)],NF-κB signaling pathway-related pro-teins,Visual Analogue Scale(VAS)scores for pain,and joint mobility were compared among the three groups before and after treatment.Results The total effective rates in the treatment group and control group were 93.33％and 90.00％,respectively,which were higher than 70.00％in the blank group(P＜0.05).The time for improvement of pain,redness,tenderness,and limited joint mobility in the treatment group was shorter than that in the control group and blank group(P＜0.05).After 7 days of treatment,the TCM syndrome score in the treatment group was lower than that in the con-trol group and blank group,and the levels of serum CRP,TNF-α,and ESR and the expressions of NF-κB signaling pathway-related proteins P50 and P65 in the treatment group and control group were lower than those in the blank group(P＜0.05).After 7 days of treatment,the VAS score in the treatment group was lower than that in the control group and blank group,and the comfort score in the treatment group was higher than that in the control group(P＜0.05).There was no significant differ-ence in the incidence of adverse reactions among the three groups(P＞0.05).Conclusion The effect of ampelopsis hydrogel in treating gouty arthritis is better than that of ampelopsis paste,and its mechanism may be related to the regulation of the NF-κB pathway and inhibition of inflammatory fac-tor expression.The hydrogel is easy to use,hygienic,and comfortable,and is expected to become a safe,effective,and convenient external medicine for gouty arthritis.

Objective:To investigate the effectiveness of case-based learning (CBL) combined with online teaching in standardized residency training of rheumatology and immunology.Methods:A total of 78 individuals who participated in standardized residency training in Department of Rheumatology and Immunology in our hospital from June 2019 to August 2020 were included and divided into observation group and control group. The individuals in the control group received traditional teaching, and those in the observation group received CBL combined with online teaching. The physicians receiving standardized residency training were evaluated by theoretical examination, clinical operation skill assessment, and instructor rating, and the degree of satisfaction with teaching, degree of satisfaction with teaching methods, and classroom learning atmosphere were also evaluated.Results:The observation group had a theoretical examination score of (94.10±2.01) and a clinical operation skill assessment score of (90.44±1.57), which were significantly higher than those of the control group ( P<0.05), and the observation group had a significantly better instructor rating (89.36±1.33) than the control group ( P<0.05). Compared with the control group, the observation group had significantly higher degree of satisfaction with teaching (3.79±0.41), degree of satisfaction with teaching methods (3.92±0.27), and evaluation of classroom learning atmosphere (3.90±0.31) ( P<0.05). Conclusion:CBL combined with online teaching can help to improve learning efficiency, stimulate the enthusiasm for learning, expand clinical thinking, promote the growth of teaching and learning, and form a virtuous cycle among trainees receiving standardized residency training, which holds promise for further exploration.

Objective To investigate the interventional effect and mechanism of a novel ampe-lopsis hydrogel on dampness-heat accumulation syndrome of gouty arthritis.Methods A total of 90 patients with gouty arthritis who met the diagnostic criteria of western medicine and were differentiated as damp-heat accumulation syndrome of traditional Chinese medicine(TCM)were randomly divided into treatment group,control group and blank group,with 30 patients in each group.The blank group was treated with etoricoxib only,the control group was treated with etoricoxib combined with ampelop-sis hydrogel,and the treatment group was treated with etoricoxib combined with external application of ampelopsis hydrogel.The clinical efficacy,time to symptom improvement,safety,comfort,changes in syndrome scores of TCM,serum inflammatory factors[C-reactive protein(CRP),tumor necrosis factor-α(TNF-α),erythrocyte sedimentation rate(ESR)],NF-κB signaling pathway-related pro-teins,Visual Analogue Scale(VAS)scores for pain,and joint mobility were compared among the three groups before and after treatment.Results The total effective rates in the treatment group and control group were 93.33％and 90.00％,respectively,which were higher than 70.00％in the blank group(P＜0.05).The time for improvement of pain,redness,tenderness,and limited joint mobility in the treatment group was shorter than that in the control group and blank group(P＜0.05).After 7 days of treatment,the TCM syndrome score in the treatment group was lower than that in the con-trol group and blank group,and the levels of serum CRP,TNF-α,and ESR and the expressions of NF-κB signaling pathway-related proteins P50 and P65 in the treatment group and control group were lower than those in the blank group(P＜0.05).After 7 days of treatment,the VAS score in the treatment group was lower than that in the control group and blank group,and the comfort score in the treatment group was higher than that in the control group(P＜0.05).There was no significant differ-ence in the incidence of adverse reactions among the three groups(P＞0.05).Conclusion The effect of ampelopsis hydrogel in treating gouty arthritis is better than that of ampelopsis paste,and its mechanism may be related to the regulation of the NF-κB pathway and inhibition of inflammatory fac-tor expression.The hydrogel is easy to use,hygienic,and comfortable,and is expected to become a safe,effective,and convenient external medicine for gouty arthritis.