Résumé
Objective To explore the effects of bone marrow mesenchymal stem cells (BMSCs) on viral myositis in mice. Methods Four-week-old BALB/C male mice were randomly divided into normal control group, myocarditis group, and BMSCs intervention group at different stages (3 days and 2 weeks). The mouse model of viral myocarditis was established by intraperitoneal injection of Coxsackie virus B3. The mice in the intervention group were injected with BMSCs in the tail vein at 3 days and 2nd week after the injection of the virus. Four weeks later, echocardiography was performed, and the pathological integral and collagen volume fraction (CVF) were observed and calculated by light microscopy. The qRT-PCR method was used to detect the mRNA expression of homogenates collagen I (col1α1) and collagen fiber III (col3α1) in myocardial tissue. Results Compared with the normal control group, the left anterior and posterior wall became thinner, the diameter and volume of the left ventricle at end systolic period was increased; left ventricular ejection fraction (LVEF) and short axis shortening rate (FS) decreased in the myocarditis group. The differences were statistically significant (P all<0.05). The LVEF and FS in each subgroup of the intervention group were better than those of the myocarditis group, and the improvement in the intervention group was more obvious at the 2nd week after the treatment of the myocarditis. The differences were significant (P all<0.05). Light microscope showed that myocardial CVF in myocarditis group was higher than in normal control group, and CVF in intervention group was reduced compared with myocarditis group and CVF in the 2nd week intervention group was lower than that in the 3 day intervention group. The differences were significant (P all<0.05). Compared with the control group, the mRNA expressions of col1α1 and col3α1 in the myocarditis group were increased, and they were lower in the intervention group than in the myocarditis group, and the differences were significant (P all<0.05). Conclusions BMSCs can reduce the degree of cardiac fibrosis and improve cardiac function in mice with viral myositis, and the intervention effect is better when the virus is infected in the 2nd week.
Résumé
Phthaloyl dichloride (1)was reacted with LiAlSeH2 to give benzo[c]selenophene-1;3-dione (2);which was treated with the Grignard reagents to generate hydroxyl compounds 3a-3h.These compounds were finally converted to target products 4a-4h by treatment with hydriodic acid.The structures of 4a-4h were confirmed by MS and 1 H NMR.Their inhibitory activity against adenosine diphosphate (ADP)-induced platelet aggregation was evaluated by Born′s turbidimetric assay;free radical scavenging activity was assayed by xanthine oxidasemethod and 1;10-phenanthroline spectrophotometric method.It was found that compound 4 f displayed more potent inhibi-tory effect on platelet aggregation than 3-n-butylphthalide and comparable hydroxyl free radical scavenging activity in vitro to that of edaravone.Therefore;compound 4 f might be the candidate for further investigation.
Résumé
Objective:To establish the determination method for four lurasidone hydrochloride enantiomers by HPLC. Methods:Lurasidone hydrochloride enantiomers were separated on a CHIRALPAK AD-H column (250 mm × 4. 6 mm, 5μm). The mobile phase consisted of hexane-ethanol-diethylamine ( 90∶10∶0. 1) at a flow rate of 1. 0 ml·min-1 and the column temperature was at 40℃. The detection wavelength was 230nm. Results:The resolution of lurasidone hydrochloride enantiomers was above 2. 0. The linear calibra-tion curves were obtained over the range of 5-120 μg· ml-1 for all the enantiomers (r=0. 999 9). The recovery was above 99. 0%with RSD below 0. 5%. The detection limits were 5ng. Conclusion:The method is simple, accurate and rapid, and suitable for the de-termination and quality control.
Résumé
BACKGROUND: Treatment methods for defects of fingertip skin or soft tissue combined with partial deletion bed include the phalanx shortening or flap coverage of wounds, each with shortcomings.OBJECTIVE: To investigate the efficacy of repairing finger nail bed defects by different treatments in one stage, and to evaluate the functional recovery of nail beds comprehensively.METHODS: From December 2002 to February 2009, 51 fingers with nail bed defects in 40 patients (11 thumbs, 22 index fingers, 14 middle fingers, 4 ring fingers) were repaired. Under the situation that the periosteum exist, when the area of nail bed defect area was less than one third of the nail, the graft was taken from the same finger. If the area of nail bed defects were larger than one third of the nail or two nail bed defects, the grafts were taken from the nail beds of 1st or 2nd toes. Under the situation that the periosteum nonexist, when the area of nail bed defect area was less than one half and more than one third of the nail, the split tissue flap was transferred from the same finger. The finger appearance and functions were observed in the follow-up. RESULTS AND CONCLUSION: All patients were followed up from 1 month to 2 years with an average of 6 months, 86.3% grafts survived very well, no pain, no infection and obvious deformed growth of nail were found. It revealed that using different treatment to repair nail bed defect is available. The grafted nail can grow in good appearance, and finger can act in good function.