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Cytotoxic responses in BC3H1 myoblast cell lines exposed to 1-desulfoyessotoxin.

著者 Suárez Korsnes M , Espenes A , Hermansen LC , Loader JI , Miles CO
Toxicol In Vitro.2013 Jul 10 ; ():.
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The Norwegian School of Veterinary Science, P.O.Box 8146 Dep., N-0033 Oslo, Norway. Electronic address: monica.suarez.korsnes@nvh.no.

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1-Desulfoyessotoxin (1-dsYTX) is a desulfated polyether compound belonging to the yessotoxin group of marine toxins. This analogue has been detected in mussels. There are so far no reports on the mechanisms of action of 1-dsYTX in in vitro cell systems. This work evaluates cytotoxic responses in BC3H1 cells exposed to 100nM 1-dsYTX. The toxicity of 1-dsYTX seems to be similar to that of yessotoxin (YTX). 1-Desulfoyessotoxin induced morphological and biochemical traits typical of a non-apoptotic form of cell death resembling paraptosis. Treated BC3H1 cells showed extensive cytoplasmic vacuolation, enlargement of mitochondria and endoplasmic reticulum and lack of DNA fragmentation. Western blotting analysis revealed phosphorylation of the protein kinase p38 and involvement of the heat shock protein Hsp70. This activation suggests involvement of different signalling pathways for programmed cell death.
PMID: 23851005 [PubMed - as supplied by publisher]
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