Objective To investigate the effects of calcitonin gene-related peptide (CGRP) combined with norepinephrine (NE) on L-type calcium current (LCa-l) in rat ventricular myocytes. Methods Ventricular myocytes were isolated from SD rats (weighing 260-280 g) by retrograde perfusion of the heart via the aorta with an enzyme-containing solution as previously described. Whole-cell patch-clamp recording was made using Axopatch 200B amplifier. The cells were perfused for 1 min with Tyrode solution containing CGRP 1 × 10-7 mol/L (group CGRP) , NE 1 × 10-6 mol/L (group NE), or CGRP 1 × 10-7 mol/L + NE 1 × 10-6 mol/L (group CN) and again washed with Tyrode solution. ICa-L was recorded 1 min before and 1 min after the cells were perfused and 1 min after the cells were washed. I-V curve of ICa-L was made after the cells were perfused with solution containing CGRP or NE alone. Results CGRP significantly inhibited the peak of ICa-L, while NE significantly promoted the peak of ICa-L(P < 0.05) . The peak of ICa-L was significantly decreased 1 min after the cells were perfused in group CGRP,while increased 1 min after the cells were perfused in group NE compared with group CN ( P < 0.05). CGRP made the I-V curve of ICa-L move up-ward, while NE made the I-V curve of ICa-L move down-ward. Conclusion CGRP can weaken the promotion of ICa-L induced by NE in rat ventricular myocytes.

Objective To investigate the anti-infection and bone repair effects of composite scaffolds encapsulated with vancomycin and bone morphogenetic protein-2 (BMP-2).Methods Chitosan (CS) solution and nano-hydroxyapatite (n-HAP) mixed in a ratio of 1∶1 were made into solid materials by freeze drrying technology,and immerged into BMP-2/polylactic acid (PLA) and vancomycin/PLA microsphere solution to fabricate drug-loaded scaffolds.Efficiency of drug release was measured.After the induction of chronic infectious tibial bone defect,60 New Zealand white rabbits were assigned to isolate debridement group (Group Ⅰ),n-HAP/CS scaffold group (Group Ⅱ),n-HAP/CS + vancomycin/PLA group (Group Ⅲ) and n-HAP/CS + vancomycin/PLA + BMP-2/PLA group (Group Ⅳ) according to the random number table,with 15 rabbits per group.After 8 weeks of treatment,X-ray filming,Norden score,HE staining and narrow culture were performed to evaluate the anti-infection ability and bone repair ability in each group.Results Pore size of the n-HAP/CS scaffold constructed in this study ranged from 80 to 270 μm (mean,146.53 μm).Biomechanical test showed the elastic modulus of the scaffold material was (27.50 ± 1.58)MPa and the compressive strength was (0.75 ± 0.04)MPa.BMP-2/PLA and vancomycin/PLA microspheres into ball shape uniformly distributed on the scaffold pores.Drug-loaded scaffold showed relatively stable release of vancomycin and BMP-2 in a period of 18 days.With the extended time amount of the drug release gradually reduced.On the X-ray films 8 weeks after the treatment,sinus formation was visible in groups Ⅲ and Ⅳ,and emergence of periosteal reaction with focal low density shadow was demonstrated in groups Ⅰ and Ⅱ.Norden scores of groups Ⅰ,Ⅱ,Ⅲ and Ⅳ were (2.64 ±0.33) points,(2.63 ±0.36) points,(1.14 ±0.29) points and (0.89 ±0.42) points respectively,indicating group Ⅳ ranked the lowest compared with other three groups (P＜0.05) and group Ⅲ showed significant difference in comparison with groups Ⅰ and Ⅱ (P ＜0.05).HE staining showed massive infiltration of inflammatory cells and destroyed bone trabeculas in groups Ⅰ and Ⅱ,trabecular bone arranged neatly in groups Ⅲ and Ⅳ,and thicker trabecular bone in group Ⅳ than in group Ⅲ.Marrow culture showed obvious pale yellow colony formation in groups Ⅰ and Ⅱ,but no colony formation in groups Ⅲ and Ⅳ.Conclusions Vancomycin/BMP-2-loaded tissue engineering scaffolds are constructed successfully.Drug-loaded n-HAP/CS composite scaffold is identified as an ideal implant material for treatment of chronic osteomyelitis in rabbits

Animals ; Birds ; virology ; China ; epidemiology ; Humans ; Influenza A virus ; classification ; pathogenicity ; Influenza Vaccines ; Influenza in Birds ; epidemiology ; prevention & control ; Influenza, Human ; epidemiology ; prevention & control

Objective To clarify the differential diagnosis between limb-girdle muscular dystrophy type 2B (LGMD2B) and polymyositis (PM). Methods Analyzed the character of clinical, histochemical and immunohistochemical pathologic with biopsied skeletal muscle in 5 patients with LGMD2B and the relationship with PM. Results Both LGMD2B and PM showed the muscle weakness in proximal limbs and elevated creatinkinase level and electromyogram showed myogenic damage. Histochemical stains: it was similar to PM, that was the muscle fibers degenerating, regenerating and necrotic and the infiltrating inflammatory cells in different extent in 5 patients. Immunohistoehemical stains: anfi-Dysferlin monoelonal antibody showed that Dysferlin was deficient on sarcolemma in LGMD2B, but it was normal in PM. Conclusions It is resemble on the clinical and histoehemieal pathologic characters in both LGMD2B and PM. It is key to antidiastole LGMD2B and PM by the immunohistochemieal stain of anti-Dysferlin monoelonal antibody.

Antibodies, Viral ; analysis ; Cerebrospinal Fluid ; virology ; Child ; Child, Preschool ; Feces ; virology ; Genotype ; Humans ; Infant ; Meningoencephalitis ; diagnosis ; virology ; Parechovirus ; classification ; genetics ; isolation & purification ; Picornaviridae Infections ; diagnosis ; epidemiology ; virology ; RNA, Viral ; genetics ; Respiratory Tract Infections ; diagnosis ; virology ; Sepsis ; diagnosis ; virology ; Sequence Analysis, DNA

Objective To establish the quality standard for Ulter Zhuhuang gel.Methods Indirubin,cholic acid and borneol were identified by TLC.The content of indirubin and cholic acid was determined by HPLC.Result The TLC sports developed was fairly clear.The HPLC method showed that the average recovery of indirubin and cholic acid was 100.3% with RSD=2.1% and 98.9% with RSD=1.8% respectively.Conclusion The method is convenient and accurate.It can be used for the quality control of Ulter Zhuhuang gel.

Heme oxygenase-1(HO-1) is an inducible stress protein.In addition to its role in heme degradation,several positive biological effects exerted by this enzyme have highlighted in recent years as anti-inflammatory,anti-apoptotic,anti-proliferative and cytoprotective functions.This oxidase system with multiple functions takes part in the pathophysiology of cardiovascular system.It is related to a variety of cardiovascular diseases including hypertension,atherosclerosis,ischemia/reperfusion injury and postangioplasty restenosis.

[Objective]To evaluate the outcome of the Pemberton osteotomy for the treatment of developmental dysplasia of the hip (DDH) in older children. [Method]There were 21 children (24 hips) older than 7 years in our study , who received the Pemberton osteotomy, and combined with femoral shortening, derotational or varus osteotomies according to the level of dislocation, anteversion and neck-shalf angle of the femur. The average age at operation were 9 years and 7 months (range: 7~13.5 years).[Result]The mean follow-up were 5 years and 5 months. Eighteen hips achieved the excellent or good clinical results according to the McKay's clinical criteria. All of the hips got improvements of the Acetabular Index, Sharp Acetabular Angle, Center-Edge Angle and Acetabular Head Index. The average results were in the normal range. Eighteen hips got ⅠorⅡclass of the Severin’s radiographic classification.However, 9 hips were limited in the range of movement. Four hips got subluxation.Six hips developed avascular necrosis of the femoral head. Three hips got improved osteoarthritis.[Conclusion]The Pemberton osteotomy for the treatment of developmental dysplasia of the hip in older children can mostly achieve well-used, contained or concentric reduction hips, meanwhile need to reduce the complications.

Objective:To investigate the current situation of surrogate in China,analyze the reasons,and then provide effective suggestions and countermeasures.Methods:A questionnaire survey was conducted among medical staff and patients in an institution with assisted reproductive technology (ART),combining literature review and sociological research methods such as data maps,to explore and analyze the surrogacy.Results:The number of institutions with ART increased rapidly and its regulation became difficult.More surrogate network was observed in first-tier cities as well as the eastern and southeastern coastal provinces.That respondents agreeing with surrogacy was quite serious in some provinces.The reasons of surrogate were patients' needs,social concepts,weak government supervision,and so on.Conclusions:It should improve the laws of ART,explore long-term supervision mechanism,strengthen the management of internet,shield the information about surrogate,enhance medical ethics education for ART staff,and guide the infertility patients to establish the correct ethical concepts.