Child ; Clinical Laboratory Techniques ; Humans ; Tuberculosis ; diagnosis

Objective To evaluate the role of myosin light chain kinase(MLCK)in the increase in the permeability of human pulmonary microvascular endothelial cells(HPMVECs)induced by mechanical stretch.Methods HPMVECs were cultured in vitro and then randomly divided into 3 groups(n = 4 each): mechanical stretch group(group S),ML9 treatment group(group M)and control group(group C).In group S,the monolayer cells and magnetic beads coated with an RGD peptide were incubated in serum-free MCDB131 medium for 2 h,the unbound beads were washed out,and then the cells were exposed to magnetic twisting stimulation(MTS)for 2 h(frequency 3 Hz,intensity 4.2 mT).In group M,the monolayer cells and magnetic beads coated with an RGD peptide were incubated for 2 h in serum-free MCDB131 medium in which MLCK inhibitor ML9(50μmol/L)was added,and the other procedures were the same as in group S.In group C,the cells after washing as in group S were incubated for 2 h without exposing to MTS.Monolayer permeability was detected with FITC-dextran flux in transwell model.The distribution of integrin αVβ3 and actin was detected using the immunofluorescence assay.Results Compared with group C,the permeability of HPMVECs was significantly increased in group S,while no significant change was found in group M.Compared with group S,the permeability of HPMVECs was significantly decreased in group M.In addition,actin polymerized to form stress fiber,and integrin αVβ3 clustered at the end of stress fiber in group S,while actin mainly distributed in the surrounding area of the cell membrane and integrin αVβ3 evenly distributed on the cell surface in group C and M.Conclusion The mechanism by which mechanical stretch induces the increase in the permeability of HPMVECs is related to MLCK activation-mediated stress fiber formation and integrin αVβ3 clustering.

Objective: To examine the expression of nitric oxide synthase (NOS), the content of nitric oxide and blood flow in nasal mucosa of allergic rhinitis guinea pigs, so as to further investigate the mechanism of allergic rhinitis. Methods: One hundred and twenty guinea pigs were randomly divided into control group (injected with normal saline) and allergic group (nasal challenge with egg albumin). The guinea pigs were executed before and immediately, 24, 48, 72 h after the last nasal challenge; the expression of endothelial nitric oxide synthase (eNOS)and inducible nitric oxide synthase (iNOS) and the content of nitric oxide were examined in mucosa tissues. The blood flow in the nasal mucosa was determined in animals before execution. Linear regression correlation was used to analyze the relationship between the nitric oxide content and blood flow in nasal mucosa. Results: The immunostaining for iNOS in surface epithelium of allergic rhinitis guinea pigs was markedly stronger than that of normal guinea pigs at all time points (P<0.01); immunostaining of eNOS was similar in the 2 groups. Compared with those in normal guinea pigs, the content of NO and blood flow increased significantly before the last challenge with allergen (P<0.01), decreased significantly immediately after the last nasal challenge (P<0.01), and then increased gradually and restored the normal level 72 h later; there was no significant difference in control group before and after challenge. The content of NO and blood flow in nasal mucosa was linearly correlated with each other in allergic group (P<0.01). Conclusion: Overexpression of iNOS protein in the nasal mucosa of allergic guinea pigs may increase local NO content and subsequently increase the blood flow in local nasal mucosa.

Adolescent ; Anti-Bacterial Agents ; therapeutic use ; Child ; Child, Hospitalized ; statistics & numerical data ; Child, Preschool ; Drug Utilization Review ; statistics & numerical data ; Female ; Hospitalization ; statistics & numerical data ; Humans ; Infant ; Male ; Respiratory Tract Infections ; drug therapy

In recent years, immune therapy for the treatment of cancer has made remarkable progress. The monoclonal antibodies of programmed death-1 (PD-1) and programmed death-ligand 1 (PD-L1) have shown considerable responses and good tolerance in the treatment of non-small cell lung cancer (NSCLC). In this review, we summarized the current clinical status and future direction of PD-1/PD-L1 in NSCLC.

Objective To observe high residual platelet reactivity in patients with acute coronary syndrome and diabetes mellitus receiving dual antiplatelet therapy with clopidogrel or ticagrelor and its influence on prognosis. Methods A total of 175 patients with acute coronary syndrome and diabetes mellitus in Wuhan Asia Heart Hospital were included in this retrospective study, and all patients were divided into two groups : ticagrelor group ( n = 22 ) and clopidogrel group ( n = 153 ) . The platelet aggregation function was tested by light transmission platelet aggregation (LTA). The high residual platelet reactivity was defined as maximum platelet aggregation rate ﹥46. 0%. The differences of high residual platelet reactivity and the effect of high residual platelet reactivity on cardiovascular events were compared between the two groups. Results The number of patients with high residual platelet reactivity in the clopidogrel group were 99 patients (64. 7%), and 8 patients(36. 4%) in the ticagrelor group (P=0. 011) . For stent thrombosis developed in three months, 3 patients were from the high residual platelet reaction group ( n=107 ) , none from the normal residual platelet reaction group ( n =68 ) ( P =0. 016 ) . For bleeding events at 3 months, there were 2 patients (1. 9%, 2/107) from the high residual platelet reaction group and 2 patients (2. 9%, 2/68) were from the normal residual platelet reaction group (P=0. 631). Conclusions Ticagrelor significantly decreases high residual platelet reactivity than clopidogrel. High residual platelet reactivity increases stent thrombosis risk for ACS and type 2 diabetes mellitus.

AIM:To investigate efficacy of ranibizumab combined with laser treatment for patients with branch retinal vein occlusion (BRVO) and macular edema.METHODS: We selected 67 patients (67 eyes) with BRVO and macular edema in our hospital from March 2013 to June 2016, they were randomly divided into observation group (n=31) and control group (n=36).The observation group was treated with ranibizumab combined with laser treatment.The control group was treated with macular grid photocoagulation.We observed best corrected visual acuity (BCVA), centre macular thickness (CMT) and macular leakage of two groups.RESULTS: The BCVA of observation group at 1, 2 and 3mo after treatment were 0.41±0.07, 0.42±0.05 and 0.48±0.05, significantly higher than those of the control group (P<0.05).The CMT of observation group at 1, 2 and 3mo after treatment were 203.11±59.13μm, 201.41±56.22μm and 204.22±60.13μm, significantly lower than those of the control group (P<0.05).The blood vessel leakage of observation group at 3mo after treatment was significantly better than that of the control group (P<0.05).No leakage ratio in the observation group was 71%.There were no postoperative infection, aseptic endophthalmitis and other complications in the two groups.CONCLUSION: Ranibizumab combined with laser treatment in patients with BRVO and macular edema has better curative effect, can improve the visual acuity of patients, eliminate macular edema, and is safe and reliable.

AIM To study the influence of indapamide(Ind) on pharmacokinetics of telmisartan(Tel) and observe the difference between male and female rats. METHODS Wistar rats were divided into Tel and Tel+Ind groups, each group containing 8 female and 8 male rats, and were ig administered a single dose of either Tel 3.6 mg·kg-1 or Tel 3.6 mg·kg-1+Ind 0.135 mg·kg-1, respectively. Blood samples were collected at intervals over 96 h after administration. The Tel concentrations in plasma were determined by high performance liquid chromatography with fluorescence detector. The Tel concentration-time curves were simulated by 3p97 software and the pharmacokinetic parameters were calculated. RESULTS Whatever in female or male rats, there were no significant differences in the main pharmacokinetic parameters of Tel between Tel and Tel+Ind groups. However, females had higher values for area under the concentration-time curve and maximum plasma concentration than males, but lower values for total clearance in both Tel and Tel+Ind groups. CONCLUSION Ind has no significant influences on the pharmacokinetics of Tel. However, pharmacokinetics of Tel is significant different between male and female rats.

The antifungal mechanism of the TS67(Penicillum sp.) producing bioactive metabolites was investigated in this paper. The test indicated that mycelia growth, spores forming and spores germination of Bipolaris maydis and Fusarium oxysporum can be inhibitied by metabolites, after 50% fermentation broth acting 120 hours, the inhibition rate of hyphal growth can reach about 77.78%, 70.30%, the inhibition rate of spores forming also arrived at 58.8%, 73.5%; under 50% fermentation broth acting 12 hours, the inhibition rate of spores germination were up to 78.3%, 62.0%, the mycelia under activity metabolites conditoins also showed surface nodulation and growing point expanding irregularly, protoplasmic condesing, etc. Based on all these results, we may draw a conclusion that activity metabolites maybe target at fungal cell wall.

Adenocarcinoma, Clear Cell ; pathology ; Aged ; Female ; Humans ; Kidney Neoplasms ; pathology ; Paranasal Sinus Neoplasms ; secondary