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One case of suppurative acromioclavicular arthritis caused by Staphylococcus aureuswas reported. The patient was admitted to hospital due to swelling and pain in the right shoulder, limited mobility without no obvious cause.Through medical history, physical examination, imaging examination, and local tissue bacterial culture, it was confirmed that the infection was caused by Staphylococcus aureus. After surgery and anti infection treatment, satisfactory treatment results were achieved. Through literature review, 95 cases of suppurative acromioclavicular arthritis were retrieved and analyzed from 57 articles.Among them, 26 cases (27%) were infected with Staphylococcus aureus, including 3 cases of clearly identified methicillin-resistant Staphylococcus aureus, 2 cases of methicillin-sensitive Staphylococcus aureus, and 1 case of methicillin-resistant Staphylococcus epidermidis; 13 cases (14%) of Streptococcus; There were 6 cases (6%) of special pathogens, including 2 cases of Haemophilus parainfluenzae, 1 case of Candida, 1 case of Bacillus pallidum, 1 case of Mycobacterium avium, and 1 case of Pasteurella multocida; 50 cases (53%) of specific infections with pathogens were not clearly reported. Suppurative acromioclavicular arthritis has the characteristics of difficult early diagnosis, rapid disease progression, and strong destructiveness. MRI and ultrasound have high specificity and sensitivity in the diagnosis of this disease, and ultrasound can assist in obtaining joint fluid for examination. Early identification of the pathogen is the key to the treatment of this disease. Before identifying the pathogen, antibiotics should not be used arbitrarily. After diagnosis, timely anti infection treatment should be carried out, and if necessary, surgical debridement should be performed. The vast majority of patients can achieve satisfactory and accurate treatment results after active and standardized treatment.
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Objective To investigate clinical efficacy of tissue-engineered artificial nerve grafts constructed by acellular nerve grafts combined with adult rat Schwann cell (SC)in the treatment of peripheral nerve injury.Methods SCs were isolated and cultured from the distal nerves of adult Sprague Dawley (SD) rats with 1-week Wallerian degeneration and then combined with acellular nerve grafts to construct tissue-engineered artificial nerve.All rats were divided into acellular nerve graft containing SCs (SC group)and nerve graft containing no cells groups (control group),five animals in each group.At 2-,4-and 8-week after surgery,sciatic function index (SFI)of the affected side was compared between two groups.At postoperative 8 weeks,nerve conduction of sciatic nerve of the injured side,recovery rate of triceps surae wet weight and other relevant parameters were equally compared between two groups.Results In the SC group,SFI of the affected side at 2-,4-and 8-week after surgery,nerve conduction of sciatic nerve at the injured side and recovery rate of triceps surae wet weight at postoperative 8 weeks were significantly better compared with those in the control group (all in P <0.05).Conclusions Combined use of adult rat SCs and acellular nerve grafts effectively repairs peripheral nerve defects and accelerates functional recovery of injured nerves.
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Objective To discuss the effect of bone marrow mesenchymal stem cell (BMSC)as the seed cell transplantation of tissue-engineered artificial nerve in the treatment of peripheral nerve injury. Methods BMSC was obtained from the bone marrow of adult rat through isolation and culture and combined with acellular nerve scaffold to construct ‘tissue-engineered artificial nerve’.After transplantation,rats were divided into two groups,the BMSC +acellular nerve conduit group(BMSC treatment group)and the empty cell conduit group(negative control group)with 5 rats in each group.Sciatic functional index (SFI)of the affected side of rats was compared between two groups at 2 weeks,4 weeks and 8 weeks after the surgery.Moreover,the sciatic conduction,recovery rate of tricipital muscle wet weight and other repair effects of the affected side were compared between two groups at 8 weeks after the surgery.Results The indicators of BMSC treatment group, including SFI assessed at 2 weeks,4 weeks and 8 weeks after the surgery as well as the sciatic conduction and recovery rate of tricipital muscle wet weight assessed at 8 weeks after the surgery,were better than those of the negative control group(all in P <0.05).Conclusions BMSC combined with tissue-engineered artificial nerve of acellular nerve scaffold can effectively promote nerve regeneration and function recovery.
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[Abstract ] Objective To explore the effective method of induction of Schwann cell-like differentiation in bone mesenchymal stem cell (BMSC)of adult rat in vitro.Methods Primary culture of Schwann cell and isolated culture of BMSC were separately conducted.According to different induction methods,the cells were divided into chemical induction group and co-culture induction group.The growth of Schwann cell and BMSC was observed under light microscope.These two kinds of cells were identified by immunofluorescence staining [detecting Schwann cell marker proteins:glial fibrillary acidic protein (GFAP) antibody and S-100 antibody] and flow cytometry.The shape and growth of cells in two groups were dynamically observed by light microscope.The induced differentiation was evaluated with immunofluorescence staining at 3 rd day after co-culture induction in the co-culture induction group and at 4 h and 1 st day after chemical induction in the chemical induction group.Results In the chemical induction group,the BMSC appeared typical Schwann cell-like morphology.The positive expression of GFAP antibody appeared at 4 h after preliminary induction.Meanwhile,the positive expression rate of GFAP and S-100 antibody was (80.9 ± 3.5)% and (59.0 ±1.1 )% at 1 st day after induction.The induced BMSC began to die at 2nd day after chemical induction and most of the induced BMSC had died at 3 rd day after chemical induction.At 3 rd day after co-culture induction,few induced BMSC showed obvious morphological changes like those in chemical induction group.The positive expression rate of GFAP and S-100 antibody was (89.8 ±2.4)% and (80.9 ±1.7)%. The positive expression rate of GFAP and S-100 antibody in the co-culture induction group was higher than those in the chemical induction group and the difference had statistical significance (all in P <0.01).Conclusions The co-culture induction not only has obvious effect on Schwann cell-like differentiation in BMSC,but also promotes the survival and proliferation of BMSC.Thus,co-culture induction is more safe and effective than chemical induction.
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Medical and health service researchers have been concerned with grasping and doing qualitative research.However,some of them show a strong tendency to reduce qualitative research to some specific research methods and ignore the relevant theoretical perspectives.This article aims to present and reaffirm the qualitative re-search methodology.In addition,the potential way to integrate qualitative research into medical and health service researches has been explored as well.
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ObjectiveTo study the efficacy of immunosuppressant IL-1RA on the rat model of penetrating keratoplasty.MethodsCorneal transplantation were performed orthotopically from Lou rats to F344 rat's recipients.Animals were randomly assigned to the following groups:1.Control.2.CsA(3mg/kg/2d,subconjunctival injection).3.IL-1RA(0.5mg/kg/2d,subconjunctival injection).Treatment began at the 1st day postoperatively and continued until the 14th day postoperatively.Mean survival times and rejection index were determined.ResultsThe mean survival time of the control group was 12.235±1.674 days,but the mean survival time for CsA and IL-1RA were 17.676±1.528 days and 19.250±1.456 days,respectively,which was statistically significant compared with the control group(P<0.01).Vascularization index in IL-RA group was markedly lower when compared with the control and CsA groups(P<0.01).ConclusionIL-1RA can markedly prolong the survival time of corneal allografts by inhibiting graft rejection,and prevent vascular growth of corneal allografts