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Objective To explore the effects of microwave irradiation on the proliferation of keloid-derived fibroblasts so as to analyze the expression of collagen-1 and the activation of the signaling pathway involved.Methods Cells from a human keloid scar were cultured in vitro and randomly divided into a control group withont any intervention,a 10 mW/cm2 microwave irradiation (10-MI) group and a 20 mW/cm2 microwave irradiation (20-MI) group.Aliquots of the latter 2 groups were irradiated at their corresponding intensities for 5 min,15 min and 30 min.The growth of fibroblasts was evaluated using MTT assay.The expression of collagen-1 and changes in the phosphorylation of protein JNK were detected using western blotting.Results Compared with the control group,no significant differences in the average growth of the keloid-derived fibroblasts were observed in the 10-MI group,but significant differences were observed in the 20-MI group and among the three sub-groups irradiated for different durations.The expression of type 1 collagen was significantly down-regulated after irradiation in a time-dependent manner.After microwave radiation at 20 mW/cm2,JNK was significantly activated compared to the control group at the different time points.Conclusions Microwave irradiation at 20 mW/cm2 can significantly inhibit the proliferation of keloid-derived fibroblasts and the down-regulalion is correlated with the irradiation's duration.It can also significantly inhibit collagen-1 expression and relieve scar formation through activating the JNK signal pathway.
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Objective To investigate the effects of different intensities and different radiation durations of 2450MHz microwaves on activation of extracellular-regulated kinase (ERK)-1/2 in cultured mouse fibroblast in vitro.Methods The fibroblasts isolated from mouse skin and cultured were directly radiated with different intensities and different durations of microwave.After direct radiation with 2450MHz microwave (0.3 W/cm2, 0.5W/cm2, 1W/cm2 ) for 15min or 30min, anti-phosphorylation extracellular-regulated kinase( ERK-1/2 ) antibody was analyzed by Western blot technique to observe phosphorylation changes of fibroblasts protein ERK-1/2.and activation of mitogen-activated progein kinase(MAPK) signal conductive pathways.Results After microwave radiation with 0.3W/cm2, 0.5W/cm2, 1W/cm2for 15min, activation of ERK-1/2 increased significantly (P < 0.05 ) ; but after 30min radiation with 0.3 W/cm2,0.5W/cm2, 1W/cm2, activation of ERK-1/2 decreased significantly(P<0.05).Conclusion It is concluded that different intensities microwave may activate different signals of fibroblasts in dose-dependent manner in vitro.Different microwave radiations can induce different activations in MAPK signal conductive pathways.
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Objective To investigate the regenerating effect of muscle satellite cells autografted onto mus-cles injured by chronic compartment syndrome (CCS). Methods Twenty-four adult rabbits were randomly divided into an experimental group (model-transplantation), a non-graft group (model) and a control group (transplanta-tion). The CCS model was established in the experimental and non-graft groups. Transplantation was done in the ex-perimental and control groups. Satellite cells from the experimental and control group rabbits were isolated and then proliferated in vitro. The specific protein was identified by immnochemistry before engrafting. Then the 4',6-diamidi-no-2-phenylindole-tagged satellite cells were transplanted back to the original soleus muscles. After transplantation,the proliferation and differentiation of the satellite cells in vivo was observed and morphological changes at the site of the injury were compared by HE staining. Results At the 28th day after grafting, the satellite cells from the com-pressed soleus muscles in the experimental group had increased significantly, whereas those in the control group had remained the same. In both the graft group and the non-graft group, HE staining showed a large cluster of myofibers and interstitial fibers necrosed in the compressed muscle, while the skeletal muscle fibers and interstitial fibers were in-tact in the control group. At the 28th day after engrafting, the engrafted muscle showed much repair; but the non-en-grafted muscle demonstrated dominant fibrosis. The morphology of the skeletal muscle in the control group was normal.Conclusions Autografting of muscle satellite cells after a small amount of expansion in vitro could improve their regen-eration efficiency for repairing a large cluster of damaged myofibers caused by chronic compartment syndrome.
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@#The Community Health Care Centre of Xujiahui, Shanghai tries to integrate the community-based rehabilitation for orthopedic chronic diseases into the primary health care system within the general practices. This paper would discuss its features, problem, and prospect.
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@#Objective To investigate the incidence of osteoarthritis disease, related factor and need of rehabilitation services. Methods 13579 questionnaires were sent randomly to the permanents resident in Xuhui District, and 12419 returned. Results The morbidity of cervical syndrome, lumbar diseases, knee osteoarthritis were 22.74%, 31.45%, and 23.37%, and more in females (P＜0.01). 23.12%, 16.59%, 20.12% patients with cervical syndrome, lumbar diseases, knee osteoarthritis accepted rehabilitation respectively, and 28.08%,36.05%, 34.18% accepted self-exercise. The top 3 complications were hypertension, cardiovascular diseases, and gastropathy. Conclusion It is important to improve the rehabilitation intervention and health education to the females and the elders, as well as the community health services and the community general practice team.
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@#Objective Practice and exploration in relation to development with large general hospital and community-based care of rehabilitation programs.Methods Utilization of advantage resources for competition and effective combination of community-based health care system can develope community-based care of rehabilitation programs.Results Feasibile plan finished in the primary and community-based health care system and technology resource can provide a theoretical basis for sustainable development.Conclusion Education of skill and rehabilitation guidance can enhance service rehabilitation in community-based.
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Objective To investigate the effects of 2 450 MHz microwave irradiation on the proliferation of cultured mouse fibroblasts in vitro, and the related gene and protein expressions. Methods Cells from mouse skin were directly radiated with microwaves of different intensities for different periods. The proliferation of fibroblasts was assayed by the MTT method, and the effects of microwave radiation on the fibroblast cell cycle were measured by flow eytometry. The mRNA expression of types Ⅰ and Ⅲ procollagen was detected by real-time RT-PCR. Anti-phosphoryl- ation extracellular-regulated kinase (ERK-1/2) antibody was introduced in immunofluorescence staining analysis to observe any changes in the phosphorylation of fibroblast protein ERK. Results ① 5 W/cm2 or 1.0 W/cm2 irradia- tion for 5 min, 15 min, or 30 min did not significantly decrease fibroblast proliferation, but irradiation at 5 W/cm2 for more than 5min caused a significant decrease in fibroblast proliferation. ②After 5 W/cm2 irradiation for 5 min, the percentage of cells in the G0/G1phase was significantly increased, and ERK was activated immediately after irradia- tion. ③The mRNA expression of type Ⅰ procollagen was down-regulated after microwave irradiation, and the magni- tude of the decreased expression correlated positively with the duration of irradiation. Thirty minutes of microwave ir- radiation at 1 W/cm2 or 5 minutes at 5 W/cm2 significantly down-regulated the mRNA expression of type Ⅰ procolla- gen and the ratio of types Ⅰ and Ⅲ. Conclusion High-intensity microwaves may inhibit the proliferation of fibro-blasts in a dose-dependent manner in vitro and down-regulate procollagen mRNA expression, which might be achieved by activating mitogen-activated protein kinase signal transduction gateways.