PURPOSE: To understand the modulation of genes by atrophy, differential expression of genes in normal and denervated skeletal muscle was investigated by DNA chip technology. MATERIALS AND METHODS: Sciatic nerve and femoral nerve were resected in right leg of rat to make the muscle atrophy model. Muscle tissues from the gastrocnemius of normal and denervated legs were homogenized and RNA were extracted. Dyes were labelled during reverse transcription and hybridization was done into the DNA chip which is consisted of about 5,000 probes. RESULTS: By statistical analysis, 39 genes were selected as differentially expressed genes by atrophy. 15 known genes up-regulated by atrophy were genes related to immune response, extracellular matrix, andsignal transduction in plasma membrane. 7 known genes down-regulated by atrophy were genes related to cell growth and proliferation, intracellular signal transduction, and energy metabolism. Some unknown gene functions were analysed by bioinformatics analysis and they were highly homologous genes with McKusick-Kaufman syndrome protein, ADP-ribosylation factor-like 4, and component X of pyruvate dehydrogenase complex. CONCLUSION: These results suggest that reduction of energy metabolism, activation of cholesterol exclusion, and changes on signal transduction pathway are involved in the process of atrophy by denervation in skeletal muscle of rat.
Abnormalities, Multiple ; Animals ; Atrophy ; Cell Membrane ; Chimera ; Cholesterol ; Coloring Agents ; Computational Biology ; Denervation ; Energy Metabolism ; Extracellular Matrix ; Femoral Nerve ; Gene Expression ; Heart Defects, Congenital ; Hydrocolpos ; Leg ; Muscle, Skeletal ; Muscles ; Muscular Atrophy ; Oligonucleotide Array Sequence Analysis ; Oxidoreductases ; Polydactyly ; Pyruvic Acid ; Rats ; Reverse Transcription ; RNA ; Sciatic Nerve ; Signal Transduction ; Uterine Diseases

We report a case of isolated primary medullary hemorrhage with a review of the literature to analyze the clinical presentation and radiological character. A 46-year-old man with chronic alcoholism developed tegmental medullary syndrome secondary to spontaneous hemorrhages in the medulla oblongata. Magnetic resonance imaging study was carried out on the third day after the second event, which showed two distinct isolated hematomas in the medulla oblongata. Digital subtraction angiography was normal. The cause of hemorrhage was presumed to be cryptic vascular malformation. The primary medullary hemorrhage usually presents with a characteristic syndrome of sudden onset vertigo with neurological signs that correspond to various combination of medial and lateral medullary involvement. Usually, the prognosis is good only with conservative treatment.
Alcoholism ; Angiography, Digital Subtraction ; Hematoma ; Hemorrhage* ; Humans ; Magnetic Resonance Imaging ; Medulla Oblongata ; Middle Aged ; Prognosis ; Vascular Malformations ; Vertigo