Objective To explore the effect of shifting the little finger abductor muscle and cutting open the metatarsophalangeal joint dorsal articular capsule to improve the appearance and function of reconstructed thumb.Methods From August 2007 to May 2012,twelve cases of Ⅳ°or Ⅴ°defect of thumb were repaired by free transplantation of the second toes with metatarsophalangeal joint.During operation,using the abductor muscle of little finger to reconstruct palmar opposition function,cutting open the joint capsule of metatarsophalangeal joint,adjusting the tension of the joint by the little finger abductor muscle and toe short extensor muscles,which were used to improve the appearance and function of reconstructed thumb.Results Twelve reconstructed thumbs all survived.Followed up from 6 to 24 months,the appearance and function were improved obviously.According to the evaluation trial standards,nine cases were optimal and 3 cases were good.Conclusion The shift of the little finger abductor muscle could reconstruct palmar opposition function,combined with metatarsophalangeal joint dorsal articular capsule incision and adjusting joint tension,could improve the appearance and function of reconstructed thumb.The effect of operation was satisfied.

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.

Ligament injury always has an unsatisfied outcome because of the poor blood supply and scar tissue formation. This may result in severe joint dysfunction. Tissue engineering, as a most prospective field, may provide an effective approach for the treatment of ligament injury. This paper has reviewed some recently published articles focusing on the sources of seed cells in ligament tissue engineering, application of growth factors, screening of scaffold materials with specific mechanical and biodegradable properties, and interaction between cells and scaffold materials. At present, what should be extensively studied are scaffolds with specific mechanical and biodegradable properties, and bioreactors providing three-dimensional culture microenvironment mimic in vivo.
Animals ; Biocompatible Materials ; Cell Differentiation ; Cells, Cultured ; Humans ; Ligaments ; injuries ; surgery ; Ligaments, Articular ; injuries ; surgery ; Mesenchymal Stromal Cells ; cytology ; Tissue Engineering

Objective To detect infection of Angiostrongylus cantonensis and examine effection of treatment to prepare monoclonal antibodies(McAbs). Methods Six-week-old BALB/c mice were imrnunized by the intraperitoneal injection of e/s antigens of Angiostrongylus cantonensis. Fusion of splecn cells from immunized mice with prepared SP2/0-Ag14 myeloma cells was performed in RPMI 1640. Fused cells were suspended in RPMI 1640 containing 1% HAT and 20% fetal calf serum and dispensed into 96-well cell culture plates. The supernatants of clones were screened by ELISA with sera of patients of angiostrongyliasis.Distribution of cohere antigen of 12D5 and 21B7 monoclonal antibodies was analyzed with immunohistochemistry. Two McAbs ( 12D5 and 21B7) were applied to detect the circulating antigen (CAg) in the sera of rats infected with A. cantonensis and angiostrongyliasis patients respectively by double antibody sandwich ELISA.Results 12D5 McAb was identified as IgG1 and 21 B7 McAb was IgM. Western blot result showed two McAbs could used to identified 55 × 103 protein of adult worms of A. cantonensis. Cohere antigen of 12D5 and 21B7 monoclonal antibodies were distributed on intestine surface of A. cantonensis. The detection rates of CAg in the sera of infected rats 100% (48/48), the detection rates of CAg in the sera of angiostrongyliasis patients was 100% (32/32). No cross-reaction to sera of patients with other infection of parasites, such as clonochiasis, fasiolopsiasis, ancylostomiasis, trichinosis, anisakiasis as well as schsitosomiasis, and health srea did not reacted with 12D5 and 21B7 McAbs,and detaction rate of antibody of angiostrongyliasis patients only reached 75% (24/32) with antigen of A. cantonensis. Conclusion Cohere antigen of 12D5 and 21B7monoclonal antibodies were antigens of enteric epithelium. Sandwich ELISA with 12D5 and 21B7 McAbs showed high specificity act as detecting CAg of A. cantonensis in sera of infection animal and patients. It is apparent that Sandwich ELISA with 12D5 and 21 B7 is not only rapid and simple without requirement of special instrument, but also rather sensitive and specific for the detection of current infection with A. cantonensis.

Epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) targeted treatment has been a standard therapy for advanced non-small cell lung cancer (NSCLC), but it is not tolerated well by all patients. In China, some studies have reported that traditional Chinese medicinal herbs (TCMHs) may increase efficacy and reduce toxicity when combined with EGFR-TKI, but outside of China few studies of this kind have been attempted.

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

The coupling between the endothelium and blood flow is an important biomedical problem and has drawn extensive research. Endothelial cells are known to adapt their shapes and functions in response to applied shear flow. Shear Stress being regarded as a primary triggering signal for cellular remodeling, it is important to understand the interaction mechanism between applied shear flow and endothelial cells. In present study we have established a theoretical model to simulate the coupling between the deformation of an endothelial cell and applied shear flow. A two dimensional computational fluid dynamic (CFD) is conducted to determine the local distributions of mechanical stress and pressure on cell surface. Our results show that: (1) the deformation of endothelial cell changes with alpha (corresponding to the shear stress imposed on cell surface by flow fluid). When alpha is greater than 0.021, the cell deformability increases greatly; (2) the distributions of stress and pressure on cell surface are not uniform, but the maximal shear stress and displacement are always at the top point of the cell. Meanwhile, we have measured the deformation of cultured human aortic endothelial cells (HAECs) exposed to shear flow by using a flow chamber. We found that the numerical results are well consistent with those of experiment. These results suggest that the non-uniformity distributions of mechanical stress and pressure on cell surface may play a particular role in the mechanism of cell activation and in the regulation of endothelial cells functions (modification of cytoskeleton, distributions of adhesion molecules, etc.). The present study offers a framework to facilitate the development of a comprehensive dynamic model for endothelial cells.
Aorta ; cytology ; Cells, Cultured ; Endothelium, Vascular ; cytology ; physiology ; Humans ; Models, Cardiovascular ; Stress, Mechanical

A theoretical model was developed to simulate the coupling between the adhered leukocyte and blood flow. Methods of computational fluid dynamics (CFD) were introduced to analyze the distributions of the shear stress and the pressure on the cell surface. Meanwhile, the hemodynamical parameters were measured with laser Doppler velocimetry. The results showed that the deformation index of the leukocyte was increased with initial contact angle and Reynolds number. The blood flow induced the redistributions of the shear stress and pressure on the surface of the cell, but the maximum shear stress was on the top point of the cell. It suggests that the non-uniform distribution of shear stress on the cell surface may play a particular role in the change of cell shape and functions.
Blood Circulation ; physiology ; Cell Adhesion ; Hemodynamics ; Humans ; Leukocytes ; cytology ; physiology ; Models, Biological ; Regional Blood Flow ; Shear Strength

The protein C anticoagulant pathway plays a fundamental role in the control of coagulation system and inflammatory response. It has been well established that physiological levels of shear stress induce endothelial structural change and modulate gene and protein expression. However, the role of shear stress in protein C pathway remains unknown. In the present study, we evaluated the effect of shear stress on the activation of protein C as well as on the expression of endothelial protein C receptor (EPCR) and thrombomodulin (TM) in human umbilical vein endothelial cells (HUVECs) which were exposed to TNF-alpha alone, shear stress alone, and TNF-alpha under shear stress. We found: (1) Either TNF-alpha or shear stress alone significantly reduced EPCR expression and protein C activation in HUVECs; and simultaneous exposure of HUVECs to TNF-alpha and shear stress resulted in a further decrease of EPCR expression and protein C activation (P<0.05); (2) Simultaneous exposure of HUVECs to TNF-alpha and shear stress resulted in the increase of soluble EPCR level more significantly than did the exposure of HUVECs to either TNF-alpha or shear stress alone (P<0.05); (3) Shear stress significantly increased TM expression on HUVECs, whereas TNF-alpha inhibited TM expression; shear stress could strongly neutralize TNF-alpha's inhibitive effect on TM expression. We therefore conclude that shear stress may play an important role in protein C pathway, which may be fulfilled by regulating EPCR expression and TM expression in endothelial cells.
Antigens, CD ; genetics ; metabolism ; Biomechanical Phenomena ; Cells, Cultured ; Endothelial Cells ; cytology ; metabolism ; Endothelial Protein C Receptor ; Humans ; Protein C ; metabolism ; Receptors, Cell Surface ; genetics ; metabolism ; Shear Strength ; Stress, Mechanical ; Thrombomodulin ; genetics ; metabolism ; Umbilical Veins ; cytology

Adolescent ; Adult ; Age Distribution ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; China ; epidemiology ; Humans ; Middle Aged ; Plague ; epidemiology ; Yersinia pestis