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Objective To investigate the effect of growth differentiation factor 11 ( GDF11 ) on aorta in apolipoprotein E-Null( ApoE-/-) mice and its possible mechanisms. Methods Four-week-old healthy male ApoE-/-mice were fed with high-fat diet for 1 week and were then divided into 4 groups:vehicle group(n=10), GDF11 group (n=10),adeno-associated virus-green fluorescent protein group(AAV-GFP group, n=10), and AAV-GDF11 group ( n=10 ) . The mice received intraperitoneal injection with phosphate buffered saline, GDF11 protein, a single injection of purified AAV-GDF11 or AAV-GFP through the tail vein, respectively. After 4 weeks, serum GDF11/8 level and endothelium-dependent vasodilatation were detected. After 12 weeks, serum GDF11/8, interleukin-6 (IL-6), tumor necrosis factor-α( TNF-α), total cholesterol ( TC), triglycerides ( TG), oxidized low density lipoprotein(ox-LDL), and free fatty acids(FFA)levels were measured, the plaque areas in aortic enface and cross sections were measured by oil red O or HE staining, the macrophages/T lymphocytes infiltration in plaques were detected with immunohistochemistry, and the mRNA expressions of IL-6, TNF-α, and IL-10 were determined by real-time PCR. Results Compared with vehicle or AAV-GFP groups, GDF11 and AAV-GDF11 groups presented improved endothelium-dependent vasodilatation, decreased levels of blood inflammatory factors, blood lipid, reduced plaque on face area sections[Vehicle group : GDF11 group:(31. 23 ± 3. 12)% vs (17. 18 ± 2. 17) %;AAV-GFP group : AAV-GDF11 group:(38.01±4.43)% vs(14.54±2.86)%,P<0.05]andcrosssections[Vehiclegroup :GDF11 group:(19. 87 ± 2. 11)% vs (10. 32 ± 1. 47)%;AAV-GFP group : AAV-GDF11 group:(23. 02 ± 2. 76)%vs (9.06±1.63)%, P<0. 05]. There were less macrophages and T lymphocytes infiltration in plaques and lower mRNA expressions of inflammatory factors at aortic wall. Conclusion GDF11 reduces the area of atherosclerotic lesion in ApoE-/-mice, which may be involved in endothelial protection, such as to reduce inflammatory reaction, and to change cellular composition in plaques.
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Humanumbilicalveinendothelialcells(HUVECs)weretreatedwith3nmol/Lliraglutidefor10, 15, 30, 45, 60, 90, 120, 150, 180, 210, 240, and 270 minutes at the concentrations of 5. 5 or 30 mmol/L glucose. Western blot analysis was used to detected protein expression and phosphorylation of insulin receptor substrates-1 ( IRS-1 ) and endothelial nitric oxide synthase ( eNOS ) . The results showed that the baseline level of phosphorylated-eNOS/eNOS was lower in high glucose group than that in normal group(0. 239 ± 0. 016 vs 0. 400 ± 0. 02,P<0. 05). Liraglutide time-dependently increased phosphorylated-eNOS/eNOS and phosphorylated-IRS-1/IRS-1 levels at 5. 5 or 30 mmol/L glucose.
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Objective: To explore the effect of irisin on atherosclerosis with possible mechanisms in diabetes mellitus (DM) mice. Methods: A total of 30 ApoE-/- mice were randomly divided into 2 groups: Control group, the mice received citrate buffer solution for modeling control,n=10. DM group, the mice received streptozotocin injection for DM modeling,n=20; the DM group was further divided into 2 subgroups as DM control (DM-C) group, the mice received normal saline injection for 12 weeks and DM + irisin group, the diabetic mice received irisin injection for 12 weeks.n=10 in each subgroup. With 4 weeks of irisin intervention, the endothelium-dependent vasodilatation was detected. With 12 weeks of intervention, the blood levels of tumor necrosis factor-α (TNF-α), high-sensitivity C-reactive protein (hs-CRP), interleukin-6 (IL-6) and oxidized low-density lipoprotein (ox-LDL) were examined by ELISA, the plaque areas in aortic en face and cross sections were measured by Oil red O or HE staining, the macrophages/T lymphocytes inifltration in plaques were detected with immunohistochemistry, and the mRNA expressions of IL-6, IL-10, TNF-α were determined by RT-PCR. Results: Compared with DM-C group, DM + irisin group presented improved endothelium-dependent vasodilatation, decreased levels of blood inlfammatory factors, reduced plaque on face area sections (22.57 ± 2.17) % vs (35.09 ± 2.38) % and cross sections (19.36 ± 1.85) % vs (25.53 ± 7.87) %,P < 0.05, less macrophages (30.5 ± 2.79) % vs (41.34 ± 9.13) % T and lymphocytes infiltration (28.11 ± 4.24) % vs (35.79 ± 9.11) % in plaques and lower mRNA expressions of inflammatory factors(IL-6: 1.76 ± 0.50 vs 3.78 ± 1.15; TNF-α: 1.05 ± 0.30 vs 2.11 ± 0.48; ICAM-1: 1.96 ± 0.69 vs 2.71 ± 0.72; VCAM-1: 0.87 ± 0.21vs 1.45±0.25; MCP-1: 1.34 ± 0.34 vs 1.77 ± 0.55) at aortic wall, P<0.05.Conclusion: Irisin may improve atherosclerosis condition in ApoE-/- DM mice, the endothelial protection and antiinflammatoryreaction were the important mechanisms. Irisin has the potential for preventing/treating atherosclerosis.
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Four-week-old male Sprague-Dawley rats were rendered diabetic by intraperitoneal injection of streptozotocin (STZ) after feeding high-fat-diet for 8 weeks,and divided into diabetes group and tumor necrosis factorrelated apoptosis ligand(TRAIL) group.Normal rats severed as a control group.Treatment with TRAIL lasted for 3 months.Total cholesterol,triglycerides,low-density lipoprotein-cholesterol,blood glucose,and insulin levels were decreased in TRAIL group,as compared with diabetes group.Area of atherosclerotic lesion in TRAIL group [(23.8 ± 5.7) ％] was significantly smaller than that in diabetes group [(47.6 ± 7.8) ％].It suggested that TRAIL may reduce the area of atherosclerotic lesion in diabetic rats.
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Objective To observe the effects of a motor relearning programme (MRP) combined with different early acupuncture interventions on muscle tension and motor function recovery after cerebral infarction.MethodsA total of 90 patients with cerebral infarction who met the inclusion criteria were divided into three groups at random:a YANGMING meridian acupuncture and MRP group ( group A),an anti-spasm acupuncture and MRP group ( group B),and an MRP group ( group C ).All of the patients in all three groups were treated with routine medication.The National Institute of Health stroke scale (NIHSS),the composite spasticity scale (CSS),Fugl-Meyer assessment (FMA),the Fugl-Meyer balance scale (FM-B) and the modified Barthel index (MBI) were used to measure performance before treatment and after 4 weeks of treatment.Another comparison was intra-group between before and after treatment. ResultsThere were significant differences in the assessment results in all of the groups after treatment compared with those before treatment.After treatment,group B was superior to group C only in terms of NIHSS scores.There was no significant NIHSS score difference between groups A and C.The FMA,CSS and MBI results revealed significant differences among all three groups,with the scores of group A consistently the highest.The average FMA score in group B was significantly higher than in group C but there was no statistically significant difference in FM-B scores among the three groups. ConclusionMRP therapy combined with early acupuncture intervention can improve motor function and muscular tension after cerebral infarction.Anti-spasm acupuncture can improve motor function and control muscular tension effectively at the same time,making it beneficial for MRP training.
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Objective To survey cervical myoelectric signals during craniocervical flexion, neutral and extension postures, and to explore the evidence that proper head position can alleviate cervical muscle fatigue in a lateral recumbent position. Methods Surface electromyography (sEMG) signals were detected from the sternocleidomastoid, upper trapezius and erector spinae muscles of 30 young subjects bilaterally during craniocervical flexion,neutral and extension postures in the left lateral recumbent position. The integrated trace area (IEMG) and median frequency (MF) were estimated. Results The average IEMG of the sternocleidomastoid muscles was significantly lower in flexion than in extension bilaterally. The average IEMG of the erector spinae muscles was lower in extension than in flexion bilaterally, and the difference was again significant. The IEMGs of the upper trapezius muscle showed no significant difference on average in the three postures bilaterally. There was no significant MF difference in any of the muscles. Conclusions The muscles in the cervical back were less activated during craniocervical extension in a lateral recumbent position. A little cranicocervical extension is optimal while resting in a lateral recumbent position.
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Objective To investigate the risk factors for nosocomial infections in rehabilitation department of a general hospital. Methods The infection rate, underlying diseases and infection sites were retrospectively reviewed in 1243 patients hospitalized in rehabilitation department of the Second Affiliated Hospital of Wenzhou Medical College from July 1, 2004 to June 30, 2008. Risk factors were determined by multivariate analysis with Logistic regression. Results The infection rate and the frequency of nosocomial infections in rehabilitation department were 18. 34 % (228/1234) and 21. 40 % (266/1243), respectively. Patients with spinal cord injury and those with cerebrovascular diseases accounted for 41.67% (95/228) and 31. 14% (71/228) of the total nosocomial infections, respectively. Urinary tract and lower respiratory tract were the frequent infection sites. The incidence of nosocomial infections was correlated with underlying diseases, age, length of stay, invasive operation, nutrition, sensory or movement disturbance and dysphagia. Conclusions Rehabilitation department has high nosocomial infection rate. Relevant risk factors should be carefully monitored to prevent or reduce the occurrence of the infections.
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Objective To study the clinical significance of neuron specific enolase (NSE),carcinoembryonic antigen(CEA) and carcinoma associated antigen(CA125) in diagnosis,evaluation of therapy and monitoring metastasis and recurrence of lung cancer.Methods The levels of NSE,CEA and CA125 were detected in the sera from 30 healthy controls,48 patients with benign diseases,50 patients with non-small cell lung cancer(NSCLC) and 14 patients with small cell lung cancer(SCLC) by using microparticle enzyme linked immunoassay and bioantibodies sandwich one step assay by using streptavidin technique,respectively.Results The levels of NSE and CEA in the sera of patients with NSCLC and SCLC were significantly higher than those of healthy controls and patients with benign diseases (both P0 05).The levels of NSE CEA and CA125 decreased after the treatment and increased greatly with the metastasis and recurrence of the cancer.After the combination of NSE and CEA and CA125,the sensitivity significantly increased,but no difference was found in the specifity.Conclusion Measuring serum levels of NSE,CEA and CA125 are very useful in diagnosis,evaluation of therapy and monitoring of metastasis and recurrence of lung cancer.