BACKGROUND:It has been confirmed that the mixing of decellularized matrix and polymer electrospinning can not only improve the structural properties of fibers,but also preserve the biological decellularized of decellularized matrix.However,there is no relevant report on the preparation of skin tissue engineering scaffolds by electrospinning polyurethane and decellularized skin matrix. OBJECTIVE:To investigate the reparative effect of a decellularized skin matrix/polyurethane blended fibrous scaffold on rat skin defects. METHODS:Polyurethane electrospun fibrous scaffold and decellularized skin matrix/polyurethane blended fibrous scaffold were fabricated using the electrospinning technique.The fiber structure was observed under scanning electron microscope.Rat adipose mesenchymal stem cells were inoculated on two kinds of scaffolds respectively.The morphology of the scaffolds was observed under scanning electron microscope.Three full-thickness skin defects of 1 cm×1 cm were fabricated on the back of 10 SD rats.Polyurethane electrospun fibrous scaffolds(control group)and decellularized skin matrix/polyurethane blended fibrous scaffolds(experimental group)were implanted in two of the defects,and no material was implanted in the remaining defects(blank control group).The skin wound healing was observed at 1,2,and 3 weeks after operation.At 3 weeks after implantation,the wound was stained with hematoxylin and eosin and the scar area was calculated. RESULTS AND CONCLUSION:(1)Under scanning electron microscope,the two kinds of electrospun fibers were reticulated,and the rat adipose mesenchymal stem cells attached to the fibers on the two kinds of scaffolds,and the adhesion was good.(2)With the extension of the postoperative time,the skin wounds of each group gradually healed.By week 3 after the operation,the skin wounds of the experimental group and the control group were basically healed,and small ulcers could be seen on the wounds of the blank control group.Hematoxylin-eosin staining of skin wounds showed that the epidermal coverage of the wound was basically complete in the control group and the experimental group,and fibroblast growth and inflammatory cell infiltration could be seen in the dermis.In addition,the collagen fibers of the wound in the experimental group were abundant and arranged in a regular order,basically parallel to the epidermal surface.The wound epidermis of blank control group was still defective.The scar area of the experimental group was smaller than that of the other two groups(P<0.05,P<0.01).(3)These results indicate that the decellularized skin matrix/polyurethane blended fibrous scaffold can effectively repair full-thickness skin defects and improve scar formation in rats.

Objective:To explore the application effect of online and offline BOPPPS teaching mode based on rain-classroom in ideological and political teaching of Dermatovenerology.Methods:A total of 242 undergraduates from Class 1 to Class 8 majoring in Medical Imaging in grade 2019 were selected.They were randomly divided into the control group(class 5 to class 8)and the experimental group(class 1 to class 4).The control group received the mixed online and offline teaching mode based on rain-classroom.The experimental group received the online and offline BOPPPS teaching mode based on rain-classroom.The ideological and political elements were integrated into the teaching of Dermatovenerology.After the course,the score of curriculum theory,the questionnaire survey of ideological and political teaching and the questionnaire survey of the satisfaction of teaching in the two groups were compared.Results:After the course,the score of curriculum theory in the experimental group was higher than that in the control group(P＜0.01).The approval rate of each question in the questionnaire on ideological and political teaching effect of the experimental group was higher than that of the control group(P＜0.05).The teaching satisfaction of the experimental group was higher than that of the control group(P＜0.05).Conclusion:In the ideological and political teaching of Dermatovenerology,the online and offline BOPPPS teaching mode based on the rain-classroom has a certain effect on improving the course performance,ideological and political education effect and students'satisfaction.

Objective To investigate the effects of neuronal pentraxin 2(Nptx2)on complement system,microglia activation and synaptic density in mice with Alzheimer's disease(AD).Methods Six-months-old APPswe/PS1dE9 double transgenic mice were divided into model group(intracerebroventricularly injected with AAV-Veh 1 × 1010 GC)and model+AAV-Nptx2 group(intracerebroventricularly injected with AAV-Nptx2 1 × 1010 GC),6-months-old wild-type mice were divided into control group(intracerebroventricularly injected with AAV-Veh 1 × 1010 GC)and control+AAV-Nptx2 group(intracerebroventricularly injected with AAV-Nptx2 1 x 1010 GC),with 12 mice in each group.One month later,the cognitive function of mice in each group was evaluated by Morris Water Maze test.The expression levels of Nptx2 and Iba1 proteins were measured by Western blot,the contents of complement related proteins were measured by enzyme linked immunosorbent assay,and the synaptic plasticity was evaluated by Golgi staining.Results The resident time in the platform quadrant of control,control+AAV-Nptx2,model and model+AAV-Nptx2 groups were(44.72±10.92),(53.32±10.29),(21.92±3.80)and(36.47±6.41)s;the number of crossing the platform were 10.08±2.64,9.58±3.09,2.25±1.29 and 5.92±1.38;the relative expression levels of Nptx2 protein were 0.33±0.06,0.63±0.10,0.09±0.03 and 0.57±0.22;the relative expression levels of Iba1 protein were 0.17±0.06,0.23±0.08,0.97±0.16 and 0.40±0.14;the synaptic densities were 22.75±4.27,29.25±4.78,8.25±2.99 and 23.75±4.86.Compared with the model group,the differences of above indexes in the model+AAV-Nptx2 and control groups were statistically significant(all P＜0.05).Conclusion Overexpression of Nptx2 protein can inhibit the activation of complement system,reduce the activation of microglia,and increase the synaptic density to alleviate cognitive impairment in AD mice.

Objective:To investigate clinical and histopathological features of adult erythema nodosum (EN) .Methods:Clinical data were collected from 54 adult inpatients with histopathologically confirmed EN in Department of Dermatology and Venereology, the First Affiliated Hospital of Wannan Medical College from November 2019 to July 2022, and analyzed retrospectively.Results:Among the 54 EN patients, there were 6 males and 48 females, their ages were 42.50 ± 11.68 years (range, 18 - 73 years), and their disease course ranged from 1 day to 10 years; 30 patients (55.56%) were diagnosed with idiopathic EN, and 24 (44.44%) with secondary EN. The most common etiological factor in secondary EN was infection (17 cases), including respiratory tract infection (9 cases), tuberculosis infection (6 cases), upper respiratory tract infection comorbid with active hepatitis B virus infection (2 cases) ; the following common etiological factor was connective tissue disease (7 cases), including Behcet′s syndrome (4 cases), Sj?gren′s syndrome (1 case), and undifferentiated connective tissue diseases (2 cases). The patients′ ages were significantly younger in the secondary EN group (38.33 ± 12.15 years) than in the idiopathic EN group (46.17 ± 10.20 years, t = 2.58, P = 0.013). All patients had skin lesions on their lower limbs, lesions were limited to both lower limbs in 24 patients with idiopathic EN and 12 with secondary EN, and the proportion of patients with lesions limited to both lower limbs was significantly lower in the secondary EN group than in the idiopathic EN group ( χ2 = 5.44, P = 0.020). Compared with the idiopathic EN group, the secondary EN group showed significantly increased white blood cell counts ([7.56 ± 2.46] × 10 9/L vs. [6.04 ± 1.60] × 10 9/L, t = 2.62, P < 0.05) and C-reaction protein levels (34.34 ± 46.48 mg/L vs. 11.45 ± 18.13 mg/L, t = 2.28, P < 0.05). In the idiopathic EN group, 23 patients mainly showed histopathological features of septal panniculitis, while 17 patients in the secondary EN group mainly showed histopathological features of mixed panniculitis or lobular panniculitis, and the proportion of patients with histopathological features of mixed panniculitis or lobular panniculitis was significantly higher in the secondary EN group than in the idiopathic EN group ( χ2 = 12.18, P < 0.001) . Conclusion:EN was more common in female adults; idiopathic EN was the most common type, and secondary EN may be a cutaneous sign of systemic diseases; for EN patients at a relatively young age, with lesions involving both lower limbs or more sites, higher white blood cell counts and C-reaction protein levels, and histopathological manifestations of lobular panniculitis, systemic examinations were required to rule out underlying causes.

With the progress of globalization, the public health emergencies represented by major infectious diseases have become a major challenge for the public health management in China. The article briefly describes the emergency response capability assessment tools in China, and introduces two emergency response assessment tools with complete content structure and wide application in the world. Then the advantages and disadvantages of the tools are compared and discussed in order to provide reference for improvement of the assessment tools for public health emergency response capability in China.
China ; Disaster Planning ; Humans ; Public Health ; Public Health Administration

Mucosal pemphigoid is a rare subepidermal immune bullous disease, mainly involving the oral cavity, eyes and other mucous membranes, with the risk of scarring, which can be life-threatening in severe cases. For patients with mucosal pemphigoid, early diagnosis and early treatment can avoid serious complications. For mild patients, dapsone or topical glucocorticoids can be used; for severe patients, combination of immunosup-pressants helps to improve clinical efficacy and reduce the dosage of glucocorticoid, including cyclophosphamide, azathioprine, methotrexate, and mycophenolic acid esters. For some refractory cases without any response to the treatments of dapsone, glucocorticoids and immunosuppressants, biological agents (including rituximab, etanercept, infliximab, and braziltinib), intravenous immune globulin and other therapies can be selected. For some patients with mucosal scarring, surgery or laser therapy can be considered to improve symptoms. However, it is necessary to further demonstrate the clinical efficacy of some immunosuppressants and biologic agents on mucosal pemphigoid in a lot of larger clinical trials.

Objective:To investigate and analyze the current situation, screening, clinical characteristics, prevention and treatment of bleeding esophageal varices in cirrhotic patients with portal hypertension in Tibet region.Methods:Clinical data of cirrhotic patients with portal hypertension through March 2017 to February 2020 from Tibet region were collected and analyzed retrospectively.Results:511 cases with liver cirrhosis were included in the study, of which 185 cases (36.20%) had compensated cirrhosis and 326 cases (63.80%) had decompensated cirrhosis. Further analysis of the etiological data of liver cirrhosis showed that 306 cases (59.88%) were of chronic hepatitis B, 113 cases (22.11%) of alcoholic liver disease, and 68 cases (13.31%) of chronic hepatitis B combined with alcoholic liver disease. Among patients with compensated liver cirrhosis, 48 cases (25.95%) underwent endoscopic examination of which 33 diagnosed as high-risk variceal bleeding. However, none of these 33 cases had received non-selective β-blocker therapy, and only four patients had received endoscopic variceal banding therapy. Among patients with decompensated liver cirrhosis, 83 cases (25.46%) had a history of upper gastrointestinal bleeding, 297 cases (91.10%) had ascites, 23 cases (7.05%) had hepatic encephalopathy, and 3 cases (0.92%) had hepatorenal syndrome. Among the patients with a history of upper gastrointestinal bleeding, 42 cases (50.60%) had received secondary preventive treatment for bleeding esophageal varices, including 39 cases of endoscopic treatment, 1 case of endoscopic combined drug treatment, 3 cases of interventional treatment, and 2 cases of surgical treatment.Conclusion:Chronic hepatitis B and alcoholic liver diseases are the main causes of liver cirrhosis in Tibet region. Moreover, this region lacks screening, prevention and treatment for bleeding esophageal varices in cirrhotic patients with portal hypertension. Therefore, it is necessary to increase the screening of high-risk groups to prevent and improve the first-time bleeding, and promote multidisciplinary team to prevent and treat re-bleeding.

OBJECTIVETo investigate the expressions of vasohibin-1 and MACC1 in lung squamous cell carcinoma (LSCC) and their associations with the clinicopathological characteristics of the patients.

METHODSThe expressions of vasohibin-1 and MACC1 proteins were examined with immunohistochemistry in 160 LSCC tissues and 80 normal lung tissues.

RESULTSThe positivity rates of vasohibin-1 and MACC1 proteins were 59.4% and 11.3% in LSCC tissues, respectively, which were significantly higher than the rates in normal lung tissues (57.5% and 8.8%, respectively; P<0.05). The expressions of vasohibin-1 and MACC1 proteins were significantly correlated with the tumor grades, lymph node metastasis, and TNM stages (all P<0.05). Spearman correlation analysis indicated a positive correlation between vasohibin-1 expression and MACC1 expressions (P<0.001). Kaplan-Meier survival analysis showed that LSCC patients with a positive expression of vasohibin-1 had significantly shorter overall survival time than those negative for vasohibin-1; the overall survival time was also significantly shorter in patients positive for MACC1 than in those negative for MACC1 (both P<0.05). Multivariate COX regression analysis indicated that positive expressions of vasohibin-1 and MACC1 protein and TNM stage were independent prognostic factors of LSCC.

CONCLUSIONAberrant expressions of vasohibin-1 and MACC1 may participate in the development and promote invasion and metastasis of LSCC. The combined detection of vasohibin-1 and MACC1 expression may provide important evidence for predicting the progression and prognosis of LSCC.

Objective To investigate the predisposing factors and clinical features of disseminated herpes zoster, and to explore factors influencing postherpetic neuralgia. Methods Clinical data were collected from 53 patients with disseminated herpes zoster and 809 patients with common herpes zoster between 2012 and 2015, and analyzed retrospectively. Logistic regression analysis was used to assess factors influencing the occurrence of and pain intensity in disseminated herpes zoster, as well as the occurrence of postherpetic neuralgia. Results No significant difference in patients′age was observed between the disseminated and common herpes zoster groups(56.66 ± 17.24 vs. 56.50 ± 15.51 years, t=0.071, P>0.05), but there was a significant difference in the gender ratio between the two groups(χ2 = 8.16, P = 0.004). The incidence rates of bullae, pustules and fever were all significantly higher in the disseminated herpes zoster group than in the common herpes zoster group(15.09%vs. 3.58%,χ2=16.04, P<0.01;47.17%vs. 26.82%,χ2=10.20, P<0.01;30.19%vs. 8.03%,χ2=28.68, P<0.01). The disseminated herpes zoster group also showed significantly higher pain scores at admission compared with the common herpes zoster group (Median[P25- P75]: 6[4- 7.5] vs. 5[3- 7], Z =-3.460, P = 0.001). Logistic regression analysis revealed that gender, age, fatigue and HIV infection were significantly associated with the occurrence of disseminated herpes zoster (all P<0.05). Additionally, HIV infection(OR=5.570, 95%CI:1.196-25.939, P=0.029), gender(OR=0.166, 95%CI:0.029-0.945, P=0.043), age(OR=1.064, 95%CI:1.010-1.119, P=0.019)and the number of days that antiviral therapy lasted(OR=0.669, 95%CI:0.505-0.885, P=0.005)were all factors influencing the occurrence of postherpetic neuralgia. Conclusion Male, old age, fatigue and especially HIV infection are risk factors for the occurrence of disseminated herpes zoster, and male, old age and antiviral therapy duration may be associated with the occurrence of postherpetic neuralgia.

OBJECTIVETo detect mutation of ADAR1 gene in a family affected with dyschromatosis symmetrica hereditaria.

METHODSClinical data and blood samples of the family were collected. Potential mutation of the ADAR1 gene were scanned in 3 patients and 3 unaffected members by PCR amplification and direct sequencing. The coding sequences of the ADAR1 were also screened in 50 normal controls.

RESULTSA frameshift mutation (c.2252insG) of the ADAR1 gene was identified in all of the 3 patients. The same mutation was not found in the 3 unaffected members and 50 normal cases.

CONCLUSIONThe frameshift mutation of ADAR1 gene (c.2252insG) is probably responsible for the disease in this family.

Adenosine Deaminase ; genetics ; Adult ; Base Sequence ; Child ; China ; DNA Mutational Analysis ; Exons ; Female ; Frameshift Mutation ; Humans ; Male ; Molecular Sequence Data ; Pedigree ; Pigmentation Disorders ; congenital ; enzymology ; genetics ; Point Mutation ; RNA-Binding Proteins ; genetics