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Objective Acute lung injury induced by variety causes can be reduced by mesenchymal stem cells.Some studies have shown that mesenchymal stem cell-derived exosomes have similar features with mesenchymal stem cell,but its role in acute lung injury is less studied.The study was to investigate the protective role and underlying mechanisms of bone marrow mesenchymal stem cell-derived exosomes (BMSC-DEs) on smoke inhalation injury (SⅡ) in rats.Methods Thirty Wistar rats were randomly divided into 3 equal groups:normal control group,smoke inhalation injury (SⅡ) model group and bone marrow mesenchymal stem cell-derived exosomes (BMSC-DEs) treated group.12 h after establishing the SⅡ model,BMSC-DEs treated group was injected with 0.5 mL BMSC-DEs (derived from 4× 106 BMSCs),and normal control group and SⅡ model group were injected with equivalent volume of normal saline.7 days later,samples were collected.The histopathologic changes of lung were observed after HE staining;BCA was used to test the amounts of total protein in bronchoalveolar lavage fluid (BALF);Enzyme linked immunosorbent assay was used to test the levels of tumor necrosis factor-α (TNF-α) and keratinocyte growth factor (KGF) in the lung tissue;Immunohistochemical was used to test the levels of pulmonary surfactant protein C(SP-C).Results The BALF levels of total protein of SⅡ group was significantly higher than those of normal control group (P＜0.01) and BMSC-DEs groups(P＜0.05);Compared with normal group [(0.164±0.021) ng/L],the levels of tumor necrosis factor-α of SII and BMSC-DEs groups [(0.355±0.106)、(0.234±0.024) ng/L] (P＜ 0.05) were significantly higher,and SⅡ group was higher than that of BMSC-DEs group(P＜0.01);Compared with normal group,the KGF protein expression level in lung tissue of SⅡ group was significantly lower (P＜0.05),but BMSC-DEs group was higher (P＜0.05).BMSC-DEs group was higher than SⅡ group (P＜0.01);Immunohistochemistry showed that the SP-C expression level in lung tissue of SⅡ group was significantly lower than those of other groups (P＜0.05).There was no statistically difference between BMSC-DEs group and control group (P＞0.05).Conclusion BMSC-DEs has a protective effect of smoke inhalation injury rats,the underlying mechanism may be related to BMSC-DEs to reduce inflammation and promote restoration of the alveolar epithelial type Ⅱ.
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Objective To understand the relationship between clinical manifestations and Kashin-Beck disease(KBD) and their contribution to diagnosis of KBD and to construct the diagnosis model for KBD in adolescents.Methods A total of 2248 subjects under the age of 18 were collected from 6 KBD endemic and 1 non-KBD areas of the Shaanxi province in China.Analysis of 32 indicators,including gender,age,and KBD clinical indicators.Indicators of the distribution of measurement data between the two groups using t test and analysis of variance,x2 test with count data,multi-category ordered response variables Logistic regression analysis for model building.Results It showed the KBD prevalence rate in adolescent had an increasing tendency with age.Analysis of indicators between the two groups,in addition to the age factor(P ＜ 0.05),the difference of ankle pain,knee pain,wrist movement disorder and other 5 indicators(P ＜ 0.05) and the last bend,elbow movement disorder,syndactyly and other 9 indicators(P ＜ 0.01 ) were statistically significant.Sixteen clinical and radiographic features in the clinical manifestations were significantly related with the clinical severity grading with KBD(P ＜ 0.01 ).Four models on the diagnostic indictors were constructed by cumulative logit model for adolescent KBD (-21ogL,Score,Wald x2 test,P ＜ 0.01 ).Conclusions The establishment of the diagnostic model based on their contribution of the joint involvement in systemic performance-related indicators has an important role for clinical diagnosis of KBD.
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Affinity selection-ultrafiltration/HPLC-MS is the combination of the ultrafiltration and HPLC-MS, mainly used for screening small active molecular substances from combinatorial libraries and natural product extracts, which can bind to solution-phase targets. Besides, it can be used in metabolic screening and characterization of ligand-receptor binding. It is a complement to the traditional methods of screening and identifying drugs. This review describes its principle and application in drug study.
Subject(s)
Humans , Chromatography, High Pressure Liquid , Methods , Combinatorial Chemistry Techniques , Drug Evaluation, Preclinical , Methods , Ligands , Mass Spectrometry , Methods , Pharmaceutical Preparations , Metabolism , Protein Binding , Small Molecule Libraries , Ultrafiltration , MethodsABSTRACT
<p><b>OBJECTIVE</b>To explore the family aggregation and the role of hereditary factors in the pathogenesis of Kashin-Beck disease (KBD).</p><p><b>METHODS</b>With a stratified sampling method, the general population of 14 villages of Linyou County were studied, from whom 225 KBD probands were selected using systematic sampling at the rate of (1/2). A total of 304 siblings of the probands were ascertained, and in these sibling pairs, the segregation ratio, heritability in different age groups and weighted mean heritability of the siblings were estimated using the methods of Li-Mantel-Grart and Falconer.</p><p><b>RESULTS</b>The KBD distribution scope in the KBD families exceeded the scope of binomial distribution (P<0.001), suggesting obvious family aggregation. The prevalence rate in the siblings of the KBD pedigree was 19.41% (59/304), significantly higher than that in the 14 KBD villages [10.90% (1180/10823), chi2=21.62, P<0.001]. The segregation ratio and heritability in the siblings of the KBD pedigrees were 0.061 and 28.61%, respectively.</p><p><b>CONCLUSION</b>As a polygenetic inheritance disease, KBD exhibits obvious familial aggregation, and genetic susceptibility accounts for (1/4) of the risk factors for KBD.</p>
Subject(s)
Adolescent , Adult , Aged , Child , Female , Humans , Male , Young Adult , China , Epidemiology , Endemic Diseases , Family Health , Osteoarthritis , Epidemiology , Genetics , Pedigree , Prevalence , Selenium , SiblingsABSTRACT
<p><b>AIM</b>To study the chemical constituents of the pine needles of Pinus massoniana lamb..</p><p><b>METHODS</b>Various chromatographic techniques were used to separate and purify. Their physico-chemical properties and spectral data (UV, IR, MS, 1H-1 H COSY, HMQC, DEPT, HMBC and ORD ect.) were measured for structure elucication.</p><p><b>RESULTS</b>Three compounds were isolated from the n-BuOH fraction of water-extracts. Their structures were identified as massonianoside A (4), massonianoside A: (7S, 8R)-3, 4, 9'-trihydroxyl-3-methyoxyl-7, 8-dihydrobenzofunan-1'-propanolneoligan-9-O-alpha-L-rhamnopyranoside, massonianoside C (5), (7S, 8R)-9,9'-dihydroxyl-3,3'-dimethyoxyl-7,8-dihydrobenzofunan-1'- propanolneoligan-4-O-alpha-L-rhamnopyranoside and cedrusin-4-O-beta-glucoside (6), (7S, 8R)-3',9,9'-trihydroxyl-3-methoxyl-7,8-dihydrobenzofunan-1'- propanolneoligan-4-O-beta-D-glucopyranoside.</p><p><b>CONCLUSION</b>Compound 4 and 5 are new compounds.</p>