Response of haemocyte lysosomes to bacterial inoculation in the oysters Ostrea edulis L. and Crassostrea gigas (Thunberg) and the scallop Pecten maximus (L.)

Specific expression of antimicrobial peptide and HSP70 genes in response to heat-shock and several bacterial challenges in mussels

“…Vibrio pectinicida, which is pathogenic to Pecten maximus larvae, was demonstrated in vitro to completely inhibit the chemiluminescence activity of P. maximus hemocytes but only partially those of C. gigas [18]. Similarly, injection of V. anguillarum induced a reduction of hemocyte lysosomal membrane stability in oysters, C. gigas and Ostrea edulis, and in the scallop, P. maximus [36]. V. anguillarum was defined as toxic to M. edulis hemocytes in vitro, as well as bacteria-free culture supernatant [37].…”

Effects of high temperatures on functional responses of haemocytes in the clam Chamelea gallina

“…For example, lysosomal and cell membranes of haemocytes from the mussel, Mytilus edulis, appeared destabilised at 0 C with respect to those of haemocytes from mussels acclimated at 10 C [8]. Significant reductions in lysosomal stability were also recorded in haemocytes from the oyster, Ostrea edulis, maintained at 15 C [9]. Important considerations can also be made for seasonal variability (mostly related to natural fluctuations in environmental temperature) in the internal defence of bivalves.…”

Factors influencing bactericidal activity of blue mussel (Mytilus edulis) haemocytes against Salmonella typhimurium

“…The subsequent movement of material from the cell surface into the interior was described as a function of metabolic activities that can be suppressed at low temperature. In agreement with this, Hauton et al [30] have also interpreted low temperature as an additional factor inhibiting bactericidal activity of bivalve haemocytes. In the present study the in vitro survival of the strains with more defect LPS was independent of temperature, indicating that the metabolic state of the haemocytes was not significantly di#erent within this temperature range.…”