Adult ; Humans ; Male ; Occupational Health Services ; Physical Examination

Child ; Erdheim-Chester Disease ; Female ; Humans

BACKGROUND: Researchers in China and abroad have done a lot of experiments to study the bond strength of dentine adhesives from generation one to six,which have received satisfied results. However,there are still no reports about the bond strength of the seventh generation adhesive (Adper EasyTM one). OBJECTIVE: To evaluate the bond strength of the Adper EasyTM one to normal dentine and caries-affected dentine,and to compare the results with total-etching adhesives. METHODS: A total of 12 healthy posterior teeth were randomly divided into group A and B; 12 posterior teeth with chronic occlusal caries were divided into group C and D. Adper EasyTM one was applied for group A and C,while Single bond 2 for group B and D. The modes of group A,B,C,D were subjected to microtensile bond strength test. Interfacial morphologies were analyzed by Stereo-Microscopy. RESULTS AND CONCLUSION: The microtensile bond strength of group A and B was (21.84±3.98),(27.10±4.85) MPa,which was (16.44±3.46) and (21.48±4.85) MPa in the group C and D. The differences between group A and B,group C and D,group A and C,as well as group B and D were statistical significant (P < 0.05). Failures mostly occur along the resin-dentine interface. The total-etching adhesives performed more effectively to both normal dentine and caries-affected dentine than Adper EasyTM one. For the same adhesive,the healthy dentine yielded higher bond strength than the caries-affected dentine.

Diabetic Neuropathies ; blood ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Humans ; Nitric Oxide ; blood ; Phytotherapy

Dermatology ; Humans ; Integrative Medicine ; Physicians

Aim To investigate the effect of selective cyclooxygenase-2 inhibitor, NS-398, on cell apoptosis in leukemia cell line K562 cells and its underlying mechanism. Methods Apoptotic cell percentage was examined by flow cytometry(FCM). The protein expression of Bcl-2 and Caspase-3 was detected by Western blot, and the activity of Caspase-3 was checked by FCM. Results NS-398 induced the cell apoptosis in K562 cells in a dose-dependent manner. After NS-398 treatment, the expression of Bcl-2 protein was downregulated, whereas the expression of Caspase-3 protein was upregulated. Moreover,the activity of Caspase-3 was increased in a dose-dependent way after NS-398 treatment. Conclusion Selective cyclooxygenase-2 inhibitor,NS-398,significantly induced apoptosis in K562 cells. The underlying mechanism might be related to the downregulation of Bcl-2 and the activation of Caspase-3.

Objective: To investigate dihydroartemisinin(DHA)-induced apoptosis of human prostate cancer cells and the underlying molecular mechanism. Methods: Nude mice were implanted with human prostate cancer PC-3 cells to establish tumor-bearing mouse model. Twenty models mice were evenly randomized into four groups: control group, solvent group (DMSO), large dose DHA (200 μ/kg) group and low dose DHA (100 μ/kg) group. The implanted tumors were observed on day 13 after drug administration. Morphological changes of PC-3 cells were observed by transmission electron microscope(TEM). The protein expression of apoptosis associated gene Bcl-2 and Bax were examined by immunohistochemical method. Apoptosis was detected by TUNEL assay. Results: TEM examination revealed scattered apoptotic cells and apoptotic bodies in tumor tissues of mice in the DHA groups; immunohistochemical examination revealed that the protein expression of apoptosis-associated gene Bcl-2 was decreased and that of Bax was increased in DHA groups (P < 0. 05). TUNEL staining revealed that the rate of cell apoptosis increased significantly in DHA groups(P < 0. 05). Conclusion: It is demonstrated that DHA has strong effect in inducing apoptosis in human prostate cancer cell line PC-3 in vivo, which might be related to the down-regulation of Bcl-2 and up-regulation of Bax.

Adult ; Barotrauma ; diagnosis ; surgery ; Hand Injuries ; diagnosis ; surgery ; Humans ; Male ; Middle Aged ; Paint

Objective To study the effect of mechanical tension on collagen arrangement and illustrate the relationship between tissue architecture and tension properties. Methods Cell morphologies, orientation and collagen arrangement of fibroblasts cultured in three different types of collagen gels with variation of mechanical tension were observed by phase contrast photomicrographs, light microscopy and transmission electron microscopy. Expression and distribution of a-smooth muscle actin (α-SMA) were investigated by immunohistochemistry. Results Phase contrast photomicrographs, light microscopy and transmission electron microscopy showed high level of tension distributed anisotropically in the monolayer gels and the anchored collagen gels, with bipolar shape of the fibroblasts, obvious polarity, arrangement of exogenous collagen fibres parallel to the long axis of the fibroblasts, especially prominent in monolayer gels. Low level of tension distributed isotropically was observed in floating collagen gels, with stellate morphology and arrangement of exogenous collagen fibres in a reticular array. Immunofluorescence showed that fibroblasts expressed high level of α-SMA protein distributed along the long axis of fibroblasts in the monolayer gels and the anchored collagen gels, especially in former ones. In contrast, few expression of α-SMA protein was found in floating collagen gels. Cell morphologies and orientation, expression and distribution of α-SMA as well as collagen arrangement of fibroblasts in the monolayer gels and the anchored collagen gels were similar to those in granulation tissue, whereas floating collagen gels resembled normal dermis or remodelled tissues. Conclusions Tissue architecture or morphology of the dermis are corresponding to tension proporties. Different tissue architectures are closely correlated with particular tension proporties.

Acellular Dermis ; Female ; Humans ; Male ; Oropharyngeal Neoplasms ; surgery ; Reconstructive Surgical Procedures ; Surgical Flaps ; Wound Healing