Acute Disease ; Adolescent ; Adult ; Aged ; Child ; Female ; Follow-Up Studies ; Humans ; Ivermectin ; analogs & derivatives ; poisoning ; Male ; Middle Aged ; Retrospective Studies ; Young Adult

BACKGROUND:The reported time of bone marrow mesenchymal stem cel s induced to differentiate into chondrocytes is different. Few studies have observed and compared the cel s’ dynamic transformation during the induction process.
OBJECTIVE:To observe the dynamic differentiation and the mature time of rabbit bone marrow mesenchymal stem cel s which were directional y induced to chondroblasts for 8, 11, 14, 17, 20 days.
METHODS:Bone marrow was aspirated from the femur of New Zeal rabbits, and bone marrow mesenchymal stem cel s were isolated by gradient centrifugation. After cultivation and amplification, bone marrow mesenchymal stem cel s at passage 3 were directional y induced to chondrocytes by the serum-free medium containing transforming growth factor beta-1. The experiments were divided into five groups according to different induction time points:8 days, 11 days, 14 days, 17 days, 20 days. Then cel ular morphology, toluidine blue staining, typeⅡ col agen immunohistochemistry, aggrecan content in induction medium, and chondrogenic differentiation in each group were observed and compared.
RESULTS AND CONCLUSION:Bone marrow mesenchymal stem cel s had apparently transformed in morphology at 8 days of induction, and presented obvious chondrocytes’ morphology at 14 days. The aggrecan in induction medium could be detected at a low level at 4 days, significantly increased at 8 days, and maintained slow increasing at 20 days. At 14 days, the metachromatic particles could be found by toluidine blue staining, and the col agen type Ⅱimmunohistochemistry was significantly positive in cel climbing slice. Experimental findings indicate that, bone marrow mesenchymal stem cel s that are monolayer cultured in a high density can be induced into chondroblasts at the effect of transforming growth factor beta-1 and other factors. There are a few chondroblasts in the early induction process, then cel s begin to have chondrocytes morphology and function after induced for 8 days, and may differentiate to mature chondrocytes at 14 days. In addition, they can keep a high biological activity in the induction process.

Objective To determine the association between homocysteine and severity of large cerebral artery atherosclerosis.Methods Total 152 ischemic stroke patients were evaluated using transcranial Doppler(TCD),magnetic resonance angiography(MRA) or digital substraction angiography(DSA).Severity of cerebral artery atherosclerosis was scaled by number of stenosed or occluded artery.Results There were 83 patients in low level homocysteine group with mean Hcy level(15.31?3.08)?mol/L,while 69 patients in high level homocysteine group with mean Hcy(34.47?21.38)?mol/L.Number of abnormal intra-and extra-artery was 1.86?1.51 and 1.52?1.46 respectively.No significant difference was demonstrated in the number of abnormal artery between two groups.No correlation was noted between Hcy and number of abnormal artery.Conclusion There is no relationship between high homocysteine and severity of large cerebral artery atherosclerosis in ischemic stroke patients.Homocysteine might be the marker of the disease.

Objective To realize rapid and non-destructive drug classification and improve the accuracy of drug classification.Methods A model for drug classification based on the combination of principal components analysis and artificial neural network (PCA-ANN) method was introduced.The software for drugs classification was then developed with the utility of MATLAB language.The near infra-red spectrum (NIRS) detection technique was executed on five kinds of drugs (a total of 120 batch samples) and the detection data was collected within the range of 1 350-1 800 nm of excitation wavelength and 0.5 nm of wavelength interval.Results The network training mean square error (MSE) was 5.91e-03,and the prediction error (β) was 2.469％ when the number of the interfering drugs number was less than 5.Conclusions The classification of drugs by NIRS combined with PCA-ANN is feasible and the classification accuracy can be increased.

Objective To survey membrane inhibitor of reactive lysis(MIRL) expression in non-small cell lung careinoma(NSCLC) and to analyze the relationship between MIRL expression and clinical staging, adjuvant chemotherapy and disease-free survial. Methods The expression of MIRL in 8 adjacent tissues and 36 NSCLC sam-pies were determined by immunohistochemistry. Furthermore, the relationship between MIRL expression and clinical stage ,adjuvant chemotherapy and disease-free survival was assayed by follow-up. Results Among 36 samples of non-small-cell lung cancer,there were 10(27.8%) samples expressing MIRE. Out of 18 samples of squamous carcinoma, 4(22.2%) expressed MIRL,while 6(37.5%) expressed it in 16 samples of adenocarcinoma,there was no statistical significance between them(P>0.05). There were no expression in 2 samples of large cell carcinoma. There was no correlation between MIRL expression and disease-free survival(P>0.05). MIRL positive expression rate in patients with preoperational adjuvant chemotherapy was significantly lower than that of those without preoperational adjuvant chemotherapy(P<0.05). Conclusions There is great percentage of MIRE expression in NSCLC. Our present study suggests that the immunological inhibition of MIRL should be blocked when monoclonal antibody is used in the treat-merit of NSCLC.

ObjectiveTo investigate the mechanism of cerebral white matter damage in premature rats induced by intrauterine infection.Methods30 mature pregnant Wistar-Imamichi rats were divided into the experimental group (n=18) and control group (n=12). The rats of the experimental group were injected with lipopolysaccharide (LPS) 0.2 mg/kg in abdomen on 15th and 16th day after gestation. Those of the control group were injected with distilled water in equal volume. 45 premature rats born in the experimental group and 45 full-term rats born in the control group were tested with RIA for interleukin-6 (IL-6). The brain tissues of another 47 premature rats and 41 full-term rats were stained with HE method. Finally water content in brain tissue were tested in 50 premature rats and 50 full-term rats.ResultsIL-6 concentration of brain tissue of the premature rats in the experimental group was significantly higher than that in the control group ( P<0.01); and water content of the premature rats' brain was also higher than that of the full-term rats ( P<0.01). The edema of periventricular white matter, loose neuropil, decreased cell numbers, broaden intercellular space, and cell swelling and rupture were found in the brain tissue of the premature rats, no abnormal form and structure were found in the control group.ConclusionWhite matter damage of premature rats can be caused by endotoxin, and accompanied by IL-6 and water contents increasing.

Objective To explore the clinical application of antibiotics Ceftazidime(CAZ) and Cefotetan(CTT)by analysis susceptibility and scatter of the CAZ adn CTT against Escherichia coli(ECO) and Klebsiella pneumoniae(KPN).Methods The drug sensitivity analysis of 1 311 strains of ECO and 898 strains of KPN isolated from 2012 to 2015 and the relationship between CAZ and CTT was analyzed by using the Whonet 5.6 software.Results The resistance rate of ESBL+ KPN to CAZ was 41.2％ and the rate to CTT was 14.1％,the difference was statistically significant(P<0.05).The resistance rate of ESBL+ ECO to CAZ was 34.6％ and the rate to CTT was 1.1％,the difference was statistically significant(P<0.05).The average value of MIC of CAZ was highest in group of ESBL+KPN,it was 6.39 μg/mL.And it was lowest in group of ESBL-KPN,it was 1.37 μg/mL.The average value of MIC of CTT was highest in group of ESBL+KPN,it was 6.8 μg/mL.And the lowest was in group of ESBL-KPN.The range of MIC of CAZ was 1-64 μg/mL,and the range of CTT was 4-64 μg/mL in all groups.The cross sensitivity of CAZ and CTT was more than 90.0％.The cross resistance was less than 5.0％.The cross sensitivity of CAZ and CTT was less than 70.0％ in ESBL+ group.And the cross resistance was up to 13.4％.Conclusion The cross resistance and cross sensitivity of the two antibiotics is very important in guiding clinical antibiotic selection or replacement.

BackgroundWhether the peeling of the inner limiting membrane (ILMP) increase the closure rate of idiopathic macular hole is still in controversy.Some ophthalmologist recommend vitrectomy combined with inner limiting membrane peeling for the treatment of idiopathic macular hole.However,the removal of ILMP is difficult because of its similar appearance to adjacent tissues.Objective This study was to investigate the efficacy of triamcinolone acetonide(TA) and indocyanine green(ICG) double staining-assisted vitrectomy combined with ILM peeling during the surgery.Methods A consecutive case- observational study was designed.The standardized vitrectomy was performed in 25 eye of 23 cases with IMH.During the vitrectomy,TA and ICG were injected into posterior pole vitreous to visualize and assist the ILM peeling.The dying effectiveness was observed,and the closure rate of macular hole,visual acuity,intraocular pressure and complications were evaluated after surgery.Written informed consent was obtained from each patient prior to operation.Results Posterior vitreous cortex and ILM were visible and the residual vitreous and cortex were removed clearly after dying of TA and ICG in all the 25 eyes.During the following-up duration of 3-8 months,the completely anatomical reattachment of the macular area was in 22 eyes ( 88.0％ ) and partially reattachment in 3 eyes( 12.0％ ).The best corrected vision was 0.07-0.60 in all of the operated eyes 2 months after surgery.Conclusions TA and ICG- assisted vitrectomy combined with ILM peeling appears to be a safe and effective method for IMH repair.

AIM: To investigate the effects of low-dose paclitaxel on the morphology of bladder after partial bladder outlet obstruction ( BOO) in rats.METHODS:Healthy female Sprague-Dawley rats ( n=30) were randomly di-vided into sham operation group, BOO group and low-dose paclitaxel group.The rats in BOO group and low-dose paclitaxel group received operation to establish an obstruction model, while the rats in sham group underwent sham operation.After operation, the rats in low-dose paclitaxel group received intraperitoneal injection of paclitaxel at a dose of 0.3 mg/kg twice a week for 4 weeks.At the same time, the animals in sham group and BOO group received the same volume of saline by in-traperitoneal injection.Four weeks after operation, each rat was sedated and the bladder was weighted.Histological chan-ges of the bladder were observed by HE staining.Collagen deposition in the bladder tissue was observed by Masson stai-ning, and the fibrosis area was measured.The ultrastructure of the detrusor was studied by transmission electron microsco-py.RESULTS:Compared with sham operation group, a significant increase in bladder weight (0.376 g ±0.052 g vs 0.112 g ±0.014 g, P<0.05), the muscle hypertrophy, and a decrease in the percentage of collagen area [collagen/(col-lagen+muscle), 29.66%±2.69%vs 38.94%±3.67%, P<0.05] was observed in BOO group.Under electron micro-scope, intracellular connection had more gap junction and desmosomes than intermediate junction.The cell gap widened with a large amount of collagen fiber.Compared with BOO group, low-dose paclitaxel group decreased bladder weight (0.215 g ±0.025 g vs 0.376 g ±0.052 g, P<0.05) and improved the muscle hypertrophy.The percentage of the colla-gen area was also decreased (19.94%±1.90% vs 29.66%±2.69%, P<0.05).The detrusor microstructure showed that the intermediate junction was characterized by a predominance among the intracellular connections, and the intercellu-lar space contained less collagen fibers in low-dose paclitaxel group.CONCLUSION:Low-dose paclitaxel may ameliorate the morphological damage of the bladder and recover bladder function in the rats with BOO by slowing down the process of bladder fibrosis.

Objective To examine the effect of fibronectin connecting segment-1 (CS1) peptidefacilitated blockade of inflammatory cells-fibronectin adhesion on a rat liver transplantation model of prolonged ex vivo cold ischemia.Methods A model of liver transplantation in Wistar→Wistar rat was established.The donors of the CS1 treatment group received CS1 peptides through the tail vein for 3 days before operation.Another two doses of CS1 peptides were administered into the liver intraportally during procurement and before transplantion.Recipients received an additional 3-day course of CS1 peptides after transplantation.Rats in control group received scrambled peptides.Rats were sacrificed at 6,24 and 72 h after transplantion,and plasma transaminase activity and hepatic pathological changes were studied.The inflammatory cells and liver sinusoidal endothelial cells were visualized histochemically.Real-time PCR was used to detect tumor necrosis factor-α (TNF-α),interleukin-1β (IL-1β) and vascular endothelial growth factor (VEGF) mRNA expression in the liver.Results The plasma transaminase activity and hepatic necrosis areas in CS1 treatment group were significantly lower than in control group (P＜0.05).CS1 peptides treatment significantly decreased the number of Kupffer cells after transplantation and greatly inhibited the recruitment of neutrophils to the graft liver as compared with control group (P＜0.05).After prolonged cold ischemia,only a few hepatic endothelial cells exhibited positive staining of hepatic sinusoidal endothelial cell biomarker SE-1.Lots of hepatic sinusoidal endothelial cells positive for SE-1 staining could be detected in CS1 group at 72 h after transplantation,while much less SE-1 positive cells presented in the control goup.Prolonged cold ischemia caused a significant increase of TNF-α,IL-1β and VEGF mRNA expression in the graft liver of control group after transplantation.The expression of TNF-α mRNA at 6 and 24 h and VEGF mRNA expression at 24 h were significantly lower in CS1 group than in control group (P＜0.05).Conclusion Peptide-mediated blockade of inflammatory cells-fibronectin interaction decreased the mRNA expression of inflammatory cytokines,prevented hepatic sinusoidal endothelial cells from injury and subsequently protected against severe ischemia/reperfusion injury of the graft liver after transplantation.