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Proteins and proteolytic activity changes during refrigerated storage in sea bass (Dicentrarchus labrax L.) muscle after high-pressure treatment ArchiMer
Cheret, Romuald; Hernandez Andres, Aránzazu; Delbarre Ladrat, Christine; De Lamballerie, Marie; Verrez-bagnis, Veronique.
Contrary to other preservation methods like thermal treatments, high pressure can destroy microorganisms without affecting the nutritional quality, color, or food texture. The firm texture of fish flesh is an important quality parameter. During the refrigerated storage, the tissue becomes softer and the muscle is deteriorated by different proteases. The aim of this study was to study the modification of the fish muscle proteins after high-pressure treatment during the refrigerated storage and to evaluate the effect of high-pressure treatment level on the post-mortem protein changes and enzyme activities. The calpain activity decreased with the high-pressure treatment and evolved differently during the refrigerated storage, depending on the level of...
Tipo: Text Palavras-chave: Cathepsins; Calpains; Sarcoplasmic proteins; Myofibrillar proteins; Post mortem denaturation; High pressure; Fish.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1708.pdf
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Regulation of Pax7 protein levels by caspase-3 and proteasome activity in differentiating myoblasts Biol. Res.
Olguín,Hugo C.
The transcription factor Pax7 negatively regulates the activity of the muscle regulatory transcription factor MyoD, preventing muscle precursor cells from undergoing terminal differentiation. In this context, the ratio between Pax7 and MyoD protein levels is thought to be critical in allowing myogenesis to proceed or to maintain the undifferentiated muscle precursor state. We have previously shown that Pax7 is subject to rapid down regulation in differentiating myoblasts, via a proteasome-dependent pathway. Here we present evidence indicating that Pax7 is also subject to caspase-3-dependent regulation. Furthermore, simultaneous inhibition of caspase-3 and proteasome activity induced further accumulation of Pax7 protein in differentiating myoblasts. These...
Tipo: Journal article Palavras-chave: Pax7; Caspase-3; Calpains; Proteasome; Satellite cells; Muscle differentiation.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000400002
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