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Interleukin 6 receptor antibody inhibits muscle atrophy and modulates proteolytic systems in interleukin 6 transgenic mice. 1996

T Tsujinaka, and J Fujita, and C Ebisui, and M Yano, and E Kominami, and K Suzuki, and K Tanaka, and A Katsume, and Y Ohsugi, and H Shiozaki, and M Monden
Department of Surgery II, Osaka University Medical School, Suita, Japan.

The muscles of IL-6 transgenic mice suffer from atrophy. Experiments were carried out on these transgenic mice to elucidate activation of proteolytic systems in the gastrocnemius muscles and blockage of this activation by treatment with the anti-mouse IL-6 receptor (mIL-6R) antibody. Muscle atrophy observed in 16-wk-old transgenic mice was completely blocked by treatment with the mIL-6R antibody. In association with muscle atrophy, enzymatic activities and mRNA levels of cathepsins (B and L) and mRNA levels of ubiquitins (poly- and mono-ubiquitins) increased, whereas the mRNA level of muscle-specific calpain (calpain 3) decreased. All these changes were completely eliminated by treatment with the mIL-6R antibody. This IL-6 receptor antibody could, therefore, be effective against muscle wasting in sepsis and cancer cachexia, where IL-6 plays an important role.

UI MeSH Term Description Entries
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D008822 Mice, Transgenic Laboratory mice that have been produced from a genetically manipulated EGG or EMBRYO, MAMMALIAN. Transgenic Mice,Founder Mice, Transgenic,Mouse, Founder, Transgenic,Mouse, Transgenic,Mice, Transgenic Founder,Transgenic Founder Mice,Transgenic Mouse
D009097 Multienzyme Complexes Systems of enzymes which function sequentially by catalyzing consecutive reactions linked by common metabolic intermediates. They may involve simply a transfer of water molecules or hydrogen atoms and may be associated with large supramolecular structures such as MITOCHONDRIA or RIBOSOMES. Complexes, Multienzyme
D009133 Muscular Atrophy Derangement in size and number of muscle fibers occurring with aging, reduction in blood supply, or following immobilization, prolonged weightlessness, malnutrition, and particularly in denervation. Atrophy, Muscle,Neurogenic Muscular Atrophy,Neurotrophic Muscular Atrophy,Atrophies, Muscle,Atrophies, Muscular,Atrophies, Neurogenic Muscular,Atrophies, Neurotrophic Muscular,Atrophy, Muscular,Atrophy, Neurogenic Muscular,Atrophy, Neurotrophic Muscular,Muscle Atrophies,Muscle Atrophy,Muscular Atrophies,Muscular Atrophies, Neurogenic,Muscular Atrophies, Neurotrophic,Muscular Atrophy, Neurogenic,Muscular Atrophy, Neurotrophic,Neurogenic Muscular Atrophies,Neurotrophic Muscular Atrophies
D009929 Organ Size The measurement of an organ in volume, mass, or heaviness. Organ Volume,Organ Weight,Size, Organ,Weight, Organ
D010450 Endopeptidases A subclass of PEPTIDE HYDROLASES that catalyze the internal cleavage of PEPTIDES or PROTEINS. Endopeptidase,Peptide Peptidohydrolases
D001835 Body Weight The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms. Body Weights,Weight, Body,Weights, Body
D002154 Calpain Cysteine proteinase found in many tissues. Hydrolyzes a variety of endogenous proteins including NEUROPEPTIDES; CYTOSKELETAL PROTEINS; proteins from SMOOTH MUSCLE; CARDIAC MUSCLE; liver; platelets; and erythrocytes. Two subclasses having high and low calcium sensitivity are known. Removes Z-discs and M-lines from myofibrils. Activates phosphorylase kinase and cyclic nucleotide-independent protein kinase. This enzyme was formerly listed as EC 3.4.22.4. Calcium-Activated Neutral Protease,Calcium-Dependent Neutral Proteinase,Ca2+-Activated Protease,Calcium-Activated Neutral Proteinase,Calcium-Activated Protease,Calcium-Dependent Neutral Protease,Calpain I,Calpain II,Desminase,Ca2+ Activated Protease,Calcium Activated Neutral Protease,Calcium Activated Neutral Proteinase,Calcium Activated Protease,Calcium Dependent Neutral Protease,Calcium Dependent Neutral Proteinase,Neutral Protease, Calcium-Activated,Neutral Protease, Calcium-Dependent,Neutral Proteinase, Calcium-Activated,Neutral Proteinase, Calcium-Dependent,Protease, Ca2+-Activated,Protease, Calcium-Activated,Protease, Calcium-Activated Neutral,Protease, Calcium-Dependent Neutral,Proteinase, Calcium-Activated Neutral,Proteinase, Calcium-Dependent Neutral
D002401 Cathepsin B A lysosomal cysteine proteinase with a specificity similar to that of PAPAIN. The enzyme is present in a variety of tissues and is important in many physiological and pathological processes. In pathology, cathepsin B has been found to be involved in DEMYELINATION; EMPHYSEMA; RHEUMATOID ARTHRITIS, and NEOPLASM INVASIVENESS. Cathepsin B-Like Proteinase,Cathepsin B1,Cathepsin B Like Proteinase,Proteinase, Cathepsin B-Like
D002403 Cathepsins A group of lysosomal proteinases or endopeptidases found in aqueous extracts of a variety of animal tissues. They function optimally within an acidic pH range. The cathepsins occur as a variety of enzyme subtypes including SERINE PROTEASES; ASPARTIC PROTEINASES; and CYSTEINE PROTEASES. Cathepsin

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