ABSTRACT
PURPOSE: To elucidate the molecular basis of muscle atrophy in cellular adaptation point of view, gene expression profiling in rat muscle atrophy model was performed. The functions changed by muscle atrophy were analyzed. MATERIAL AND METHODS: Sciatic nerve and femoral nerve were resected in right leg to make muscle atrophy model in rat. The left leg was considered as a compensatory hypertrophy model. The suppression subtractive hybridization (SSH) was done to identify the profile of differential gene expression during muscle atrophy followed by nerve injury in rat. The DNA fragments obtained in SSH were labeled with biotin and used as cDNA tags for isolation of full-length cDNA from cDNA library. Differentially expressed genes were confirmed by reverse dot blot hybridization. RESULTS: Down regulation of genes were much more predominant than up regulation. The profile of down regulated genes were composed of genes coding muscle contractile proteins, enzymes involving carbohydrate metabolism including glycolysis and glycogenolysis, enzymes in oxidative phoshorylation, and proteins related with calcium release. The target genes were isolated by enrichment using cDNA tags from cDNA library for further functional studies. We identified some novel genes related with muscle atrophy by nerve injury. CONCLUSION: During the process of muscle atrophy, genes coding muscle contractile proteins, enzymes in carbohydrate metabolism, enzymes in oxidative phosphorylation, and proteins related with calcium release were down regulated.
Subject(s)
Animals , Rats , Atrophy , Biotin , Calcium , Carbohydrate Metabolism , Chimera , Clinical Coding , Contractile Proteins , DNA , DNA, Complementary , Down-Regulation , Femoral Nerve , Gene Expression , Gene Expression Profiling , Gene Library , Glycogenolysis , Glycolysis , Hypertrophy , Leg , Muscle, Skeletal , Muscles , Muscular Atrophy , Oxidative Phosphorylation , Proteins , Sciatic Nerve , Up-RegulationABSTRACT
OBJECTIVES: The purpose of this study was to get help in order to diagnose orthopaedic disease, measure its activity and determine treatment plan by measuring the beta-glucuronidase activity in urine, serum and joint fluid. METHODS: The beta-glucuronidase activity was determined in the serum, urine and joint fluid of the patients with degenerative arthritis, rheumatoid arthritis, osteomyelitis and osteogenic sarcoma, and some other disease to study the change of the enzyme activity. These values of each specimen were calculated by standard curve and treated by statistical analysis. RESULTS: The results obtained were summarized as follows. 1. The beta-glucuronidase activity in the serum, urine and joint fluid was increased in patients with degenerative arthritis, rheumatoid arthritis, osteomyelitis and osteogenic sarcoma etc. 2. The increased beta-glucuronidase activity in the serum and joint fluid of each disease does not show a specific finding about respective disease, but the increased beta-glucuronidase activity was statistically significant in the urine of all disease groups(male:p=0. 0041, female:p=0. 0001). CONCLUSIONS: On the basis of these results, it was suggested that beta-glucuronidase activity was affected by the orthopaedic disease and differed according to each specimen.
Subject(s)
Humans , Arthritis, Rheumatoid , Glucuronidase , Joints , Osteoarthritis , Osteomyelitis , OsteosarcomaABSTRACT
No abstract available.