Osmoregulated Chloride Currents in Hemocytes from Mytilus galloprovincialis

被引:11
作者
Bregante, Monica [1 ]
Carpaneto, Armando [1 ]
Piazza, Veronica [2 ]
Sbrana, Francesca [1 ]
Vassalli, Massimo [1 ]
Faimali, Marco [2 ]
Gambale, Franco [1 ]
机构
[1] Natl Res Council Italy IBF, Inst Biophys, Genoa, Italy
[2] Natl Res Council Italy ISMAR, Inst Marine Sci, Genoa, Italy
关键词
POTASSIUM CHANNELS; ESSENTIAL COMPONENT; VOLUME REGULATION; ION CHANNELS; MUSSEL; TRANSMISSION; TRANSPORTERS; IMMUNOCYTE; ACTIVATION; VACUOLES;
D O I
10.1371/journal.pone.0167972
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We investigated the biophysical properties of the transport mediated by ion channels in hemocytes from the hemolymph of the bivalve Mytilus galloprovincialis. Besides other transporters, mytilus hemocytes possess a specialized channel sensitive to the osmotic pressure with functional properties similar to those of other transport proteins present in vertebrates. As chloride fluxes may play an important role in the regulation of cell volume in case of modifications of the ionic composition of the external medium, we focused our attention on an inwardly-rectifying voltage-dependent, chloride-selective channel activated by negative membrane potentials and potentiated by the low osmolality of the external solution. The chloride channel was slightly inhibited by micromolar concentrations of zinc chloride in the bath solution, while the antifouling agent zinc pyrithione did not affect the channel conductance at all. This is the first direct electrophysiological characterization of a functional ion channel in ancestral immunocytes of mytilus, which may bring a contribution to the understanding of the response of bivalves to salt and contaminant stresses.
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页数:18
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