Objective To investigate the changes and the significance of the number of nerve cells and the expression of the postsynaptic density tyrosine kinase(Fyn) in the hippocampus of the rat whose spatial learning and memory function was enhanced by chronic multiple stress. Methods Thirty-nine adult rats were randomly divided into three groups: multiple stressed,single stressed and control group.Rats in the multiple stressed group were irregularly and alternatively exposed to the situation of vertical revolve,sleep expropriate,restraint(6h/d),and night illumination for 6 weeks,to preparate chronic multiple stressed model.Rats in the single stressed group were exposed to restraint only for 6 weeks,6h/d.After that,the performance of spatial learning and memory of all rats was measured using Morris water maze.Nerve cells in different subfields of the hippocampus were observed using Cresyl violet method and counted regardless of size or shape.The expression of Fyn protein and the level of Fyn mRNA in the hippocampus of rats were detected by immunohistochemical method and RT-PCR technique respectively. Results Compared with control group,the performance of spatial learning and memory of rats was increased in multiple stressed group and decreased in single stressed group((P

Objective To investigate the quantity of formaldehyde released by artificial wood-based boards sold in Lanzhou. Methods Formaldehyde quantity released by three kinds of artificial wood-based boards(42 samples) were determined with desiccator method. Results Among 42 samples, 9 artificial wood-based boards were E1-level (21.4%), 20 E2-level (47.6%), the others disqualification (31%). A significant difference (0.01

Dysfunctions of vascular endothelial permeability are related to a number of human diseases such as atherosclerosis, high blood pressure, stroke, inflammation, cancer, diabetes-induced retinopathy, macular edema and so on. Shear stress is an important mechanical force that affects vascular endothelial cells. It plays a particular role in permeability regulation. Rho GTPases is a family of small G proteins which act as cell signal molecules. They are assumed to mediate the regulation of the permeability of vascular endothelial cells. In this paper review is given on how shear stress regulates the permeability of vascular endothehal cells as well as the in-fluence of Rho GTPases on the role in molecular mechanism. It is suggested that shear stress-regulated vascular endothelial permeability is mediated by Rho GTPases.

The migration of endothelial cell induced by fluid shear stress is related to many physiological and pathological responses in organism.The redistribution of membrane receptors and proteins,caused by shear stress,is a vital step for cell migration,followed by chemical reactions and signal transduction.Then cell morphological changes are induced,such as polarity,protrusion,and adhesion,which lead to the migration of endothelial cell at last.The goal of this paper is to review what is known about the mechanical models of endothelial cell migration and the responses of cells to fluid flow.It is helpful for better understanding the intrinsic mechanism of mechano-chemical signal pathway of the migration of endothelial cells induced by fluid shear stress.

Luminal surface of vascular endothelium is decorated with a variety of polysaccharide-protein complexes,which constitute the glycocalyx.It has been demonstrated that vascular endothelial glycocalyx plays an important role in modulation of selective permeability of vessels,mediation of the blood cell-endothelial cell interactions and the release of nitric oxide induced by fluid shear stress under physiological condition.In inflammation condition,sheding of glycocalyx due to inflammation mediator leads to its functional weakening in vessel protection.At the same time,heparan sulfate as a major constituent of vascular endothelial glycocalyx could be involved in regulating the evolution of inflammation.Heparan sulfate interacts with L-selectin to mediating leukocyte rolling,presents chemokines on luminal surfaces of endothelial cells to mediate leukocyte crawling and firm adhesion,participates in transcytosis of chemokines from tissue to luminal side of endothelial cells during inflammation.Various risk factors of atherosclerosis,as an inflammatory disease,are closely associated with vascular endothelial glycocalyx.This paper is aimed to review the role of vascular endothelial glycocalyx in inflammation and atherosclerosis.

Coronary heart disease is a kind of heart disease that is caused by atherosclerosis. The lipid deposition in the vessel wall results in occlusion of coronary artery and stenosis, which could induce myocardial ischemia and oxygen deficiency. Intervention therapies like percutaneous coronary intervention (PCI) and coronary stent improve myocardial perfusion using catheter angioplasty to reduce stenosis and occlusion of coronary artery lumen. Accordingly, intervention therapies are widely applied in clinic to treat ischemic cardiovascular disease, arterial intima hyperplasia and other heart diseases, which could save the patients' life rapidly and effectively. However, these interventions also damage the original endothelium, promote acute and subacute thrombosis and intimal hyperplasia, and thus induce in-stent restenosis (ISR) eventually. Studies indicated that the rapid reendothelialization of damaged section determined postoperative effects. In this review, reendothelialization of implants after intervention therapy is discussed, including the resource of cells contributed on injured artery, the influences of implanted stents on hemodynamic, and the effects of damaged degree on reendothelialization.
Angioplasty, Balloon, Coronary ; Cardiac Catheterization ; Coronary Artery Disease ; therapy ; Coronary Restenosis ; prevention & control ; Endothelium, Vascular ; pathology ; Humans ; Myocardial Ischemia ; prevention & control ; Stents ; Thrombosis ; prevention & control

This study was aimed to analyze the volatile oil of Mentha crispata Schrad. ex Willd. in order to provide evidence for its chemotype and guidance for its production application. The chemical analysis was detected by headspace GC-MS. The results showed that 64 chemical compounds were detected. It was concluded that the volatile oil of M. crispata Schrad. ex Willd. mainly contained eucalyptol (35.58%), limonene (16.92%) and pinene (15.33%). It was concluded that the analysis on composition characteristics and main compounds of M. crispata Schrad. ex Willd. can provide evidences in its production application and chemotype.

Objective To investigate the outcome of the finger reconstruction using one toe transfer to repair the tissue defects of two fingers at the same time. Methods Two fingers joint tissue missing and finger defect of 8 fingers in 4 cases were reconstructed with dissociative transplants harvested from two parts of the same toe at the same time.Using the paratelum of the second toes reconstructed the indicis paratelum or finger tip,and using the proximal interphalangeal joint of the second toes repaired the proximal interphalangeal joint's tissue defects of the middle finger at the same time in 2 cases.Using the distal interphalangeal joint and the proximal interphalangeal joint of one second toe reconstructed the proximal interpha langeal joints of the index finger and the middle finger in 1 case.Using the proximal interphalangeal joint and the metatarsophalangeal joint of one second toe reconstructed the metacarpophalangeal joints of the index finger and the middle finger in 1 case. Results All the transplants survived.The patients were followed-up from 2 months to 46 months postoperatively.The function and shape of 2 resconstruction fingers were excellent as assessed with Criterion on Functional Evaluation on Finger Reconstruction issued by Chinese Society of Hand Surgery.Five resconstruction fingers were good.One resconstruction finger was fire. Conclusion For some appropriate cases with the tissue defects of 2 fingers such as the finger's paratelum,the interphalangeal joint or the metacarpophalangeal joint,this operated technique was a good method.

Objective To provide the data of mandible and zygomatic arch, including the space distance of mandible angles, depth and length of zygomatic arch, by direct measurement and related analysis at home position of corpse in Chinese Han for medical aesthetics. Methods The vernier callipers were used to directly measure the every indexes of mandible and zygomatic arch in the formalin-fixed male and female adult corpses (50 each) and to proceed the related analysis. Results The results showed that male mandible thickness was (12.60?1.26) mm, mandible height (33.60?3.35) mm, mandible length (77.60?7.80) mm , width of mandible ramus (34.80?3.50) mm, height of mandible ramus (67.20?6.70) mm, depth of zygomatic arch (9.54?1.19) mm, length of zygomatic arch (40.60?4.97)mm, and thickness of mandible angle (12.20?0.67) mm in male; Mandible thickness was (10.70?0.98) mm, mandible height (29.40?2.64) mm, ramus of mandible height (74.00?7.07) mm, width of mandible (31.10?3.04) mm, height of mandible ramus (64.00?5.53) mm, depth of zygomatic arch (8.67?1.09) mm, l ength of zygomatic arch (36.50?4.59) mm, and thickness of mandible angle (13.80?1.28) mm in female. Conclusions The breadth between bilateral angle of mandible could come to reckoning the depth of zygomatic arch, the length of zygomatic arch and other indexes of mandibles. Those data are useful in aesthetics and preparation of the compound.

Low shear stress is a component of the tumor microenvironment in vivo and plays a key role in regulating cancer cell migration and invasion. The integrin, as a mechano-sensors mediating and integrating mechanical and chemical signals, induce the adhesion between cells and extracellular matrix (ECM). The purpose of this study is to investigate the effect of low shear stress (1.4 dyn/cm2)on the migration of HepG2 cells and the expression of integrin. Scratch wound migration assay was performed to examine the effect of low shear stress on the migration of HepG2 cells at 0 h, 1 h, 2 h and 4 h, respectively. F-actin staining was used to detect the expression of F-actin in HepG2 cells treated with low shear stress at 2 h and 4 h. Western blot analysis was carried out to determine the effect of low shear stress on the expression of integrin at different durations. The results showed that the migrated distance of HepG2 cells and the expression of F-actin increased significantly compared with the controls. The integrin alpha subunits showed a different time-dependent expression, suggesting that various subunits of integrin exhibit different effects in low shear stress regulating cancer cells migration.
Actins ; physiology ; Cell Movement ; Extracellular Matrix ; physiology ; Hep G2 Cells ; Humans ; Integrins ; physiology ; Stress, Mechanical