Objective To observe the vasodilation effect of extract of Jasminum samba (EJs), a kind of traditional Chinese medicine, on ex vivo rat thoracic aortic rings, and to investigate its mechanism. Methods On ex vivo aortic ring perfusion device, influence of EJs on contraction of the aorta induced by phenylephrine (PE) or potassium chloride (KCl) was observed. Influence of N-nitro-L-arginine-methylester ( L-NAME ), barium chloride ( BaCl2 ), glibenclamide ( Gli ) on vasodilating effect of EJs (0. 5, 1, 2, 4, 8 g·L-1 ) was detected. Effect of EJs on the contraction of calcium chloride (CaCl2 ) and PE in Ca2+-free medium was detected. [ Ca2+ ] i in vascular smooth muscle cells was determined by using laser scanning confocal microscope (LSCM). Results In blood vessels with intact endothelium, EJs concentration-dependently decreased PE- or KCl-induced vasoconstriction, the maximum dilating effect being (105. 0±3. 2)% and (78. 0±6. 5)% , respectively; L-NAME affected the vasodilatory effect of EJs on thoracic aorta rings ( P<0. 01), the maximum dilatory effect being (58. 0 ± 6. 9)% . BaCl2 and Gli had significant influence on vasodilation of EJs, and the contraction was obviously attenuated (P<0. 01), the maximum dilatory effect being (37. 0±5. 2)% and (78. 0±10. 0)% , respectively. EJs significantly inhibited contracting effect of PE on thoracic aorta rings in Ca2+-free medium (P<0. 01). The maximum contraction effect was (70. 0±6. 3)% . EJs inhibited CaCl2-induced vasoconstriction (0. 5-8 mmol·L-1 ), and vasoconstriction was decreased by (65. 0±3. 2)% . LSCM recorded that Fmax / F0 of 4 and 8 g·L-1 EJs was (2. 0±0. 2) and (1. 5±0. 2), respectively. Conclusion EJs exerted a dose-dependent vasodilating effect on rat isolated aorta rings. The mechanism might be related to promoting NO release, activating K+channels and decreasing the concentration of cytoplasmic Ca2+.

Objective To investigate the effects of ischemic preconditioning on pneumocyte apoptosis and the expression of HSFT0 after lung isehemia-reperfusion(I/R) in rats and discuss its possible mechanism of extenu-ating ischemia-repedusion injury. Method Thirtysix male Sprague-Dawley rats were randomly divided into three groups [ sham operation(SO ) group, ischemia-teperfusion(L/R) group, and ischemic preconditioning(IP) group],twelve in each group. Lung croas-clamping was used to build the L/R model. In IP group, three cycles of 5-minute-ischemia + 5-minute-reperfusion were given to the pulmonary artery before the procedure. Sham operation rats had a thoracotomy only. Two hours(or five hours) reperfusion was given to both L/R and IP group. Tenninal-deoxynucleotidyl Transferase Mediated d-UTP Nick End Labeiing(TUNEL) was used to evaluate apoptosis. Expression of HSP/0 in lung was observed by immunohistochemical stain and image analysis. Index of quantitative assessment of histologic lung injury(IQA), wet to dry weight ratio(W/D) were measured. The pathological change of lung tissue was observed under both hght and electron microscopy. Statistical analysis was carried out by One-way Anova. Scheffe test was used for intragroup comparison. Results The apoptosis index and expression of HSP70、W/D,IQA of hng tissue in I/R group were higher than those in the sham operation group (P<0.01). Compared with the L/R group, the apoptosis index and expression of HSP70, W/D, IQA of lung tissue significantly decreased (P<0.01), the levels of expression of HSPTO increased significantly in IP group ( P<0.01 ). The pathological and ultrastructure change of lung tissue was better in IP group than those in I/R group. Condusions Ischemic preconditioning can extenuate lung I/R injury by the possible mechanism of increasing the expression of HSPT0 which inhibits the apoptosis during lung I/R injury.

Objective To investigate the correlation between age and the prognosis of thrombolytic therapy in acute ischemic stroke (AIS).Methods One hundred and fourteen patients with AIS were divided into ≤60 years group,61-70 years group and ≥71 years group according to age.Thrombolysis and post-thrombolysis treatment was done in accordance with 2010 version of Chinese Acute Ischemic Stroke Treatment Guidelines standard.The United States National Institutes of Health Stroke Scale (NIHSS) score was done in patient immediately after treatment,24 h after thrombolysis and 7 d after thrombolysis,and modified Rankin scale (mRS) score was assessed 3 months after thrombolysis The spontaneous intracranial hemorrhage (sICH) and the death of 2 weeks was recorded.Results ≤ 60 years group had 22 males and 10 females;61-70 years group had 26 males and 10 females; ≥71 years group had 20 males and 26 females.In ≥ 71 years group,women accounted for 56.52％ (26/46),which was higher than that in the other 2 groups,and there was significant difference (x2 =0.685,P =0.015).The NIHSS score immediately after treatment,24 h after thrombolysis and 7 d after thrombolysis among 3 groups had no significant difference (P ＞ 0.05).The mRS score at the 3 months after thrombolysis among 3 groups was (1 ± 3),(2 ± 5) and (2 ± 3) scores,respectively,and there was significant difference(P =0.040).Mortality and incidence of sICH in 2 weeks also had significant difference (P =0.049,0.017).Conclusions Despite the differences in the mortality and incidence of sICE among different ages,thrombolytic therapy with recombinant tissue-type plasminogen activator can significantly improve the neurological deficit after 3 months in AIS patients of different ages.

The aim of this article is to study how andrographolide-releasing collagen scaffolds influence rabbit articular chondrocytes in maintaining their specific phenotype under inflammatory environment. Physical blending combined with vacuum freeze-drying method was utilized to prepare the andrographolide-releasing collagen scaffold. The characteristics of scaffold including its surface morphology and porosity were detected with environmental scanning electron microscope (ESEM) and a density instrument. Then, the release of andrographolide from prepared scaffolds was measured by UV-visible spectroscopy. Rabbit chondrocytes were isolated and cultured and seeded on andrographolide-releasing collagen scaffolds. Following culture with normal medium for 3 d, seeded chondrocytes were cultured with medium containing interleukin-1 beta (IL-1β) to stimulate inflammation for 7 d. The proliferation, morphology and gene transcription of tested chondrocytes were detected with Alamar Blue assay, fluorescein diacetate (FDA) staining and reverse-transcriptase quantitative polymerase chain reaction (RT-qPCR) test respectively. The results showed that the collagen scaffolds prepared by vacuum freeze-dry possess a high porosity close to 96%, and well-interconnected chambers around (120.7±17.8) μm. The andrographolide-releasing collagen scaffold continuously released andrographolide to the PBS solution within 15 d, and collagen scaffolds containing 2.22% andrographolide significantly inhibit the proliferation of chondrocytes. Compared with collagen scaffolds, 0.44% andrographolide-containing collagen scaffolds facilitate chondrocytes to keep specific normal morphologies following 7 d IL-1β induction. The results obtained by RT-qPCR confirmed this effect by enhancing the transcription of tissue inhibitor of metalloproteinase-1 ( ), collagen II ( ), aggrecan ( ) and the ratio of / collagen I( ), meanwhile, reversing the promoted transcription of matrix metalloproteinase-1 ( ) and matrix metalloproteinase-13 ( ). In conclusion, our research reveals that andrographolide-releasing (0.44%) collagen scaffolds enhance the ability of chondrocytes to maintain their specific morphologies by up-regulating the transcription of genes like , and , while down-regulating the transcription of genes like and which are bad for phenotypic maintenance under IL-1β simulated inflammatory environment. These results implied the potential use of andrographolide-releasing collagen scaffold in osteoarthritic cartilage repair.

OBJECTIVE：To compare the chemical constituents of petroleum ether fraction from ethanol extract of Aconitum sinomontanum before and after processing. METHODS ：After A. sinomontanum was purified with water ，the raw product decoction pieces were prepared ；the raw decoction pieces were steamed with licorice juice under high pressure to prepare processed decoction pieces of A. sinomontanum . The petroleum ether fractions of raw product and processed product were obtained after ultrasonic extraction with 95％ ethanol. The chemical constituents in the samples were analyzed by GC-MS. NIST 2014 mass spectrometry database was used to compare and match the components . The peak area normalization method was used to determine the relative percentage content of each component. RESULTS ：Before and after processing ，fatty acids and esters were the main components in the petroleum ether fraction from ethanol extract. Totally 18 chromatographic peaks were detected in the detection pieces of raw product，and 13 compounds were identified ，accounting for 94.60％ of the total content of volatile components. The components with relatively high content were （Z，Z，Z）-9，12，15-octadecatrienoic acid （26.13％），hexadecanoic acid ethyl ester （25.27％）， palmitoleic acid （10.84％），ethyl linoleic acid （10.67％），（Z，Z）-9，12-octadecenoic acid methyl ester （6.66％），pentadecanoic acid（5.11％）and so on. Totally 25 chromatographic peaks were detected in the decoction pieces of processed products，and 18 components were identified ，accounting for 82.40％ of the total content of volatile components. The components with relatively high content were palmitoleic acid （18.95％），（Z，Z）-9，12-octadecenoic acid methyl ester （17.93％），hexadecanoic acid ethyl ester（11.94％），（Z，Z，Z）-9，12，15-octadecatrienoic acid （10.54％），（Z，Z）-9，12-octadecenoic acid （5.51％），（Z）-11-hexadecanoic acid（5.30％）and so on. After processing ，7 new components were added ，5 of which were identified as （－）-eucalyptus globulus alcohol，ethyl 2-methyltetrade-canoate，6-methyl-4-phenylcoumarin，β-sitosterol，heptadecane. After processing ，no components disappeared，and the content of some components increased or decreased. CONCLUSIONS ：After processing ，the volatile components in the petroleum ether fraction from ethanol extract of A. sinomontanum are different ，and（－）-eucalyptus globulus alcohol and other components are added after processing.