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By-products of Scyliorhinus canicula, Prionace glauca and Raja clavata: A valuable source of predominantly 6S sulfated chondroitin sulfate

2016; Elsevier BV; Volume: 157; Linguagem: Inglês

10.1016/j.carbpol.2016.09.050

1879-1344

Ramón Novoa-Carballal, Ricardo I. Pérez‐Martín, María Blanco, Cármen G. Sotelo, Dario Fassini, Cláudia Nunes, Manuel A. Coimbra, Tiago H. Silva, Rui L. Reis, José Antonio Vázquez,

Marine Biology and Environmental Chemistry

Chondroitin sulfate (CS) was isolated from Scyliorhinus canicula (fin, head and skeleton), Prionace glauca (head), and Raja clavata (skeleton) by-products from fish processing industry using environmentally friendly processes. The molecular weight was determined by gel permeation chromatography and the sugar composition and sulfation position by NMR and SAX-HPLC after enzymatic digestion. The CSs showed a prevalent 6S GalNAc sulfation for the 3 species (4S/6S ratio lower than 1). A higher 6S sulfation was observed for P. glauca head and R. clavata skeleton (4S/6S ratio below 0.20) than for S. canicula (4S/6S ratio ca. 0.6). The existence of CS samples with such low 4S/6S ratio has only been observed before in a rare species of shark (Mitsukutina owatoni, globin shark). The good extraction yields achieved make S. canicula, P. glauca and R. clavata fish industry by-products a useful source of 6-sulfated chondroitin sulfate.