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- W2130975479 abstract "Age-associated muscle wasting, or sarcopenia, can be delayed or reversed with interventions, including exercise and pharmaceutical agents. Mapping morphometric changes in the skeletal muscle insulin growth factor 1 receptor can provide valuable information regarding mechanisms controlling muscle protein metabolism. Immunocolloidal gold labeling is a powerful immunocytochemistry procedure for detecting antigens at the ultrastructural level, providing plausible biological markers of cell and tissue adaptations to stimuli. The intent here was to employ immunogold labeling to identify, localize, and quantify the insulin growth factor receptor-I (IGF-IR) in elderly human skeletal muscle. Needle biopsy specimens of the leg vastus lateralis muscle were fixed with 1% glutaraldehyde and 4% paraformaldehyde, dehydrated, and embedded in LR white resin. Pilot experiments were carried out to establish optimal dilutions of primary and secondary antibodies and to employ controls to establish staining specificity. The 6 nm gold particles were first evident when viewed at transmission electron microscopy (TEM) magnifications at 54,000x and clearest at 71,000x. Consistencies were noted in the staining patterns, with the majority of particles lying in proximity to the myofilaments. Gold particles were also found randomly along the outer membrane of the sarcolemma and the mitochondrial membranes. National Institutes of Health (NIH) Image 1.55 version software was used to measure receptor density (NIH, Bethesda, Md., USA). It appears that immunogold labeling of postembedded tissue samples is a sensitive method for detecting IGF-I receptors at the ultrastructural level." @default.
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- W2130975479 date "2005-07-01" @default.
- W2130975479 modified "2023-10-13" @default.
- W2130975479 title "Immunogold labeling of insulin growth factor-I receptors in elderly human skeletal muscle" @default.
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- W2130975479 doi "https://doi.org/10.1002/sca.4950270408" @default.
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