BACKGROUND:Stem cel transplantation has a certain effect in the treatment pulmonary arterial hypertension.
OBJECTIVE:To investigate the effect of bone marrow mesenchymal stem cel s transplantation on the treatment of pulmonary arterial hypertension and to discuss the mechanism.
METHODS:Bone marrow mesenchymal stem cel s were in vitro cultured, purified and amplified by density gradient centrifugation method, and labeled with the fluorescent dye for preparation. Pulmonary arterial hypertension model was established by subcutaneous injection of monocrotaline. One week after modeling, the rats were randomly divided into three groups. Rats in the stem cel transplantation group and pulmonary arterial hypertension group received subcutaneous injection of monocrotaline to establish the pulmonary arterial hypertension model. One week later, the rats in the stem cel transplantation group received sublingual vein injection of bone marrow mesenchymal stem cel solution, the rats in the pulmonary arterial hypertension group were injected with the culture medium without stem cel s, and the rats in the control group were injected with the normal saline in the same dose.
RESULTS AND CONCLUSION:At 2 weeks after transplantation, compared with the mesenchymal-induced pulmonary arterial hypertension rats, the hemodynamic parameters and the ratio of right ventricular/body weight of the rats in the stem cel transplantation group were significantly improved (P<0.05);the degree of pulmonary vascular remodeling was significantly reduced (P<0.05). Fluorescence microscope observation showed that the transplanted bone marrow mesenchymal stem cel s could alive at least 2 weeks in the stem cel transplantation group, and part of the stem cel s could differentiate into pulmonary vascular endothelial cel s. The results show that bone marrow mesenchymal stem cel transplantation can significantly improve the pulmonary vascular and right ventricular structural impairments in the rats with mesenchymal-induced pulmonary arterial hypertension.

Objective To discuss the clinical value of simultaneous morcellation in situ in laparoscopic myomectomy (LM). Methods One hundred and eighty-nine women who underwent LM for symptomatic myomas were randomly divided into in situ group(94 cases) and standard group(95 cases). The operation time, hemorrhage perioperative,exhaust time postoperative, length of hospital stay were compared.Results The operation was successful in two groups. The operation time and hemorrhage perioperative in situ group were significantly less than those in standard group [ (98.20 ± 40.70) min vs. ( 129.20 ± 68.50)min (P＜0.05) and (113.40± 38.30) ml vs. (168.90±61.70) ml (P＜0.01)]. There was no statistical difference in exhaust time postoperative, length of hospital stay between two groups (P ＞0.05). One case occurred eechymoma in two groups respectively. Conclusion The application of simultaneous morcellation in situ in LM is safe and feasible.

Objective To provide an experimental evidence for the clinical applications of glyceryl trinatrate(GTN)and isosorbide dinitrate(ISDN)against Coxsackievirus B(CVB)-related myocarditis.Methods Coxsackievirus B3 was propagated in HeLa cells.Virus yields were determinded by 50% tissue culture infective dosage(TCID50).BALB/c mice were attacked with 5000 TCID50 of CVB3,meanwhile,the mice were administrated with GTN and ISDN.All mice were killed at the 14th day.The myocardial tissues were harvested for histologic evaluation.Results The infection plaques in the myocardial tissues obtained from CVB3-infected BALB/c mice treated with GTN were siginificantly reduced(0.89?0.18 in GTN group and 1.25?0.22 in ISDN group)compared with that of the untreated CVB3-infected mice(P

In the present study, we carried out intratracheal administration of bone marrow-derived mononuclear cells (BM-MNCs) to dehydromonocrotaline (DMCT)-induced canine pulmonary artery hypertension (PH) of rat model to examine the security and feasibility, and the aim was to discuss the mechanism. All animals (n=30) were randomly divided into 3 groups (n=10 in each group), i. e. control group, PH group and BM-MNCs group. Six weeks after the transplantation, the hemodynamic data and right ventricle weight ratio were significantly improved for those in BM-MNCs group compared with those in PH group. The lung mRNA levels of vascular endothelial growth factor (VEGF) were higher, while preproendothelin-1 (ppET-1), interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha) were lower compared with those in the PH group (P<0. 05). Immunofluorescence and histochemical results confirmed that 6 weeks after the administration, transplanted BM-MNCs were still alive and could differentiate into pulmonary vascular endothelial cells. These results showed that intratracheal administration of BM-MNCs could obviously reduce or even reverse the DMCT induction of PAH process. The mechanism could be explained as that the function was mainly through the paracrine effect to promote renewable and reduce inflammation.
Animals ; Bone Marrow Cells ; cytology ; Cell Transplantation ; methods ; Dogs ; Familial Primary Pulmonary Hypertension ; Female ; Hypertension, Pulmonary ; chemically induced ; therapy ; Leukocytes, Mononuclear ; transplantation ; Male ; Monocrotaline ; analogs & derivatives ; Rats

OBJECTIVETo explore the role of P38 signaling pathway in neonatal rat astrocyte swelling and the expression of aquaporin-4 (AQP4) after oxygen-glucose deprivation (OGD) and recovery (OGD/R).

METHODSPrimarily cultured neonatal rat astrocytes were subject to OGD for 5 h followed by oxygen-glucose recovery in the presence or absence of the P38 inhibitor SB203580 (10 µmol/L). The astrocytes were investigated at 0.5, 2, 8 and 24 h after oxygen-glucose recovery for morphological changes and cell injuries using lactate dehydrogenase (LDH) assay. The expressions of P38, P-P38, and AQP4 mRNAs and proteins in the astrocytes were detected using RT-PCR and Western blotting.

RESULTSOGD/R caused significantly enhanced expression of P-P38 protein, and this effect was blocked by SB203580. AQP4 mRNA and protein expression declined transiently at 0.5 h after OGD and increased gradually to reach the peak level at 8 h (P<0.05). Application of the SB203580 significantly lowered OGD-induced AQP4 mRNA and protein up-regulation (P<0.05). Astrocyte swelling occurred after OGD/R but was obviously lessened by SB203580. LDH release increased markedly after OGD/R, and was attenuated by treatment with SB203580 (P<0.01).

CONCLUSIONP38 signaling pathway participates in astrocyte swelling after OGD/R, and blocking this pathway can attenuate AQP4 up-regulation and ameliorate the cell swelling.

Animals ; Animals, Newborn ; Aquaporin 4 ; metabolism ; Astrocytes ; metabolism ; pathology ; Brain Edema ; metabolism ; pathology ; Cell Hypoxia ; Glucose ; pharmacology ; MAP Kinase Signaling System ; physiology ; Oxygen ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Reperfusion Injury ; metabolism

Objective To explore the prognostic value of Acute Kidney Injury Network (AKIN)criteria combined with Acute Physiology and Chronic Health Evaluation Ⅱ (APACHE Ⅱ)and Sequential Organ Failure Assessment(SOFA)scoring system in acute kidney injury(AKI)after cardiac surgery. Methods Clinical data of patients who underwent open-heart surgery in Zhongshan Hospital,Fudan University from April 2009 to August 2009 were prospectively collected.AKI after cardiac surgery was classified by AKIN staging system.APACHE Ⅱ and SOFA scores were evaluated according to the worst value of physiologic variables in the 1st 24 h after surgery.Discrimination and calibration of these three models were assessed by receiver operating characteristic(ROC) curve and Hosmer-Lemeshow goodness-of-fit test.Besides,their effects on inhospital mortality were evaluated by multivariate Logistic regression analysis. Results Of the 993 admissions,309 patients developed AKI and the incidence was 31.1%.The median time that developed postoperative AKI and reached the Scr peak were 1 d and 2 d respectively.Either APACHE Ⅱ or SOFA scores,which was positively correlted with the severity of AKI(APACHEⅡr=0.37,P<0.01;SOFA r=0.42,P<0.01)was higher in AKI patients compared with that in nonAKI patients(P<0.01).The mortality rose corresponding to the severity of kidney injury.However,the predicted death rate-adjusted(PDR-A)calculated by APACHE Ⅱ scoreS Was higher than the actual value in non-AKI patients and AKIN stage 1(P<0.01),while it was lower in AKIN stage 3 (P<0.01).The areas under the ROC curve of APACHEⅡ,SOFA and AKIN criteria were all above 0.8 and the results of Hosmer-Lemeshow goodness-of-fit test indicated good calibration of three models.Multivariate analysis showed that APACHE Ⅱ≥19(OR=4.26)and AKIN stage 3(OR=76.151 were independent predictors of in-hospital mortality. Conclusions AKI can be classified by AKIN criteria in the early stage after cardiac surgery and the AKIN staging system may serve the prediction of prognosis.The APACHE Ⅱ and SOFA scores just evaluated in the 1st 24 h after operation can discern the severity of patients'illness.Three models all present good discrimination and calibration in predicting patients'outcome.APACHE Ⅱ≥19 along with AKIN stage 3 are found to be the independent predictors of in-hospital mortality.It should be noticed that the deviation between PDR-A and the actual mortality in subgroups,dynamic evaluation may raise the accuracy of scoring system.

OBJECTIVETo explore the role of p38 signal pathway in regulating matrix metalloproteinase-9 (MMP-9) expression and brain edema formation in a rat model of traumatic brain injury (TBI).

METHODSA total of 130 adult male Sprague Dawley rats were randomly divided into 4 groups, namely the normal group (n=10), sham-operated group (n=40), TBI (induced by Feeney free falling methods) group (n=40), and SB group with intraperitoneal SB203580 treatment (10 µmol/L) 15 min before TBI (n=40). The rats were sacrificed 2 h and 2 days after TBI. The expressions of p38, p-p38, and MMP-9 mRNA and protein were detected by RT-PCR and Western blotting. The blood brain barrier permeability was detected by Evans Blue (EB) test, and the brain water content (BWC) was determined using a gravimetric technique.

RESULTSThe expression of p-p38 protein increased markedly 2 h after TBI (P<0.05), and was suppressed by SB203580 treatment (P<0.05). MMP-9 mRNA and protein showed no obvious increase at 2 h after TBI, but significantly increased at 2 days as compared with those in the sham-operated group (P<0.05). MMP-9 mRNA and protein were much lower in SB group than in TBI group 2 days after TBI (P<0.05). The blood brain barrier permeability significantly increased 2 h after TBI (P<0.05) and kept increasing until 2 days (P<0.05), but was reduced significantly by SB203580 (P<0.05). BWC increased obviously 2 days after TBI (P<0.05) and was lessened by SB203580 (P<0.05).

CONCLUSIONBlocking p38 signal pathway can attenuate MMP-9 upregulation and brain edema after TBI, suggesting the important role of p38 in regulating MMP-9 expression to affect traumatic brain edema.

Animals ; Brain Edema ; pathology ; Brain Injuries ; metabolism ; Enzyme Inhibitors ; pharmacology ; Imidazoles ; pharmacology ; MAP Kinase Signaling System ; Male ; Matrix Metalloproteinase 9 ; metabolism ; Pyridines ; pharmacology ; Rats ; Rats, Sprague-Dawley

Nerve growth factor (NGF) can promote the regeneration of peripheral nerve as well as contraction and reepithelization of wound. We constructed a bioengineered dermis containing microencapsulated NGF-expressing NIH-3T3 cells and study the effect of the microencapsule to the bioengineered dermis and seed cells. NGF gene was transfected into NIH-3T3 cells and enclosed into alginate-poly-L-lysine-alginate (APA) microencapsulation and cultivated in vitro. Content of NGF in microencapsules culturing supernatant was measured by enzyme linked immunosorbent assay (ELISA) method. These microencapsules were co-cultured with epidermic cells and fibroblast cells. Bioengineered dermis was constructed with NGF-expressing micorencapsules as seed cells using tissue engineering method. NIH-3T3 microencapsules, empty microencapsules, normal culture media were control groups. After one week culture, the characteristics of the dermis were described by MTT test, the content of hydroxyproline (HP), HE staining and ultrastructure photograph. We found the NGF-expressing microencapsulates can secret NGF steadly after cultured 8w in vitro, promot the proliferation of epidermic cells and secret collagen of fibroblast cells. These functions can maintaine in bioengineered dermis. So NGF-expressing NIH-3T3 microencapsulates can promote the quality of bioengineered dermis.
Alginates ; chemistry ; Animals ; Biocompatible Materials ; chemistry ; Cell Proliferation ; Dermis ; cytology ; Gene Expression Regulation ; Mice ; NIH 3T3 Cells ; Nerve Growth Factor ; genetics ; Polylysine ; analogs & derivatives ; chemistry ; Skin Physiological Phenomena ; Tissue Engineering ; methods ; Transfection ; methods

Objective To grope for an ideal immune strategy in grown-ups via comparison of immunological effects under 4 different vaccination schemes.Methods Study population was selected by stratified random cluster sampling.A total of 4 different vaccination proposals,including Strategy A (3 doses,10 μg,administrated repeatedly into the unilateral deltoid muscle at 0-1-6 months),Strategy B (2 doses,20 μg,administrated into the bilateral deltoid muscles simultaneously),Strategy C (3 doses,10 μ g,administrated repeatedly into the unilateral deltoid muscle at 0-1-2 months) and Strategy D (2 doses,10 μg,administrated to the bilateral deltoid muscles at the same time),were conducted in Liangzhou,Minqin Gulang,and the Tianzhu Tibetan Autonomic county respectively,in Wuwei city,Gansu province.Under 4 different strategies,post-vaccination immunological effectiveness was evaluated when blood samples of participants collected in the eighth months,post-first injection and in the third year,and tested by enzyme-linked immunoassays and electro-chemiluminescence immunoassay.Chi-squared test and Fisher exact test were used to evaluate the immumological differences between the 4 strategies.Wilcoxon's signed rank test and Kruskal-Waillis H test were conducted to compare the differences of the geometric mean titers (GMTs) of antibody against HBV surface antigen (anti-HBs) titers.Results A total of 1 621 eligible participants aged 16 to 60 years old,were recruited for the study.Numbers of administration and gender were testified as the presuming factors for influencing immune effectiveness.The vaccination completion rates were 53.97％ and 79.82％ in Strategy A and C,respectively,and the difference statistically significant (P＜0.05).In the first year,the protective antibody sero-conversion rates (standardization rate) were 89.21％,54.88％,92.11％,and 41.63％,in Strategy A,B,C and D,respectively,and the significant statistically differences emerged (P＜0.05) if Strategy B,C and D were compared with Strategy A (as the gold standard).Over a 3-year follow-up period,the levels of GMTs on protective antibody declined from 179.2 IU/L,51.6 IU/L,277.1 IU/L and 10.1 IU/L to 61.3 IU/L,21.2 IU/L,31.8 IU/L and 6.0 IU/L in Strategy A,B,C and D,respectively,and the differences of declination on GMTs showed statistically significant differences (P＜0.05) when compared within or between the 4 strategies.Conclusion The 0-1-2 months' prophylactic schedules (Strategy C) seemed superior to the others,in terms of effectively inducing the protective antibody,with shorter duration of vaccination,persisting longer immunity and having higher rate of completive vaccination,so is worth to be recommended as a feasible immune programme for adults,especially for migrants from the rural regions.

Objective To perform a Meta-analysis on hepatitis B surface antigen (HBsAg)-positive rates among general Chinese population aged 1-59 years.Methods We systemically reviewed the related data (January 2007 to August 2016) published from Chinese National Knowledge Infrastructure (CNKI),VIP,and PubMed.We also assessed the HBsAg-positive rates among general Chinese populations aged 1-59 years,using a random effects regression model with the comprehensive Meta-analysis software 2.2.Results A total of 46 papers were finally included,with a total sample size of 625 053 individuals.Results from the Meta-analysis showed that the overall combined HBsAg-positive rate was 5.7％ (95％CI:4.8％-6.6％) among general Chinese populations aged 1-59 years.When comparing the HBsAg-positive rates in different regions,data showed that the HBsAg-positive rate of was higher in the mid-western areas (6.3％,95％CI:4.9％-8.0％)than in the eastern areas (5.5％,95％CI:4.4％-6.8％).Results showed that HBsAg-positive rates was higher in males (6.1％,95％CI:5.3％-7.0％) than in females (4.8％,95％CI:4.2％-5.5％).As for the HBsAg-positive rates in different time periods,data showed positive rate of 6.3％ (95％CI:5.5％-7.2％)in 2007-2009,5.9％ (95％CI:4.4％-8.0％) in 2010-2012 and 3.5％ (95％CI:2.0％-6.1％) in 2013-2016,respectively.Conclusion The prevalence of hepatitis B virus infection was decreasing between 2007 and 2016 in China,making the country an intermediate endemic area on HBV.