title: Identification of relevant cancer related-genes in the flat oyster Ostrea edulis affected by disseminated neoplasia.
abstract: Disseminated neoplasia (DN), an oyster disease resembling leukaemia, has been reported in a number of species of marine bivalve molluscs. The disease is characterised by a proliferation of abnormal circulating cells of unknown origin resulting in the invasion of tissues and organs, frequently with a fatal end of the affected individuals. To obtain a more comprehensive view of bivalve cancer processes, suppressive subtracted hybridisation (SSH) and quantitative RT-PCR (q-PCR) approaches were combined to investigate changes in the transcriptome of Ostrea edulis haemolymph cells associated to DN. Two SSH libraries were constructed and 587 expressed sequence tags (ESTs) were sequenced, obtaining 329 ESTs which showed expression changes in neoplastic process. Transcription expression analyses (q-PCR) were done for a total of 24 genes that could be relevant in neoplastic process, including genes with role in the regulation of cell cycle, apoptosis or chromosomal defects. Most of those genes had not been reported in association with cancer in non-vertebrate organisms. The over-expression and under-expression of some of those genes in DN-affected oysters was in agreement with observations in vertebrate cancer. The results herein reported contribute to cancer understanding in bivalve molluscs.
authors: Centro de Investigacións Mariñas, Consellería do Medio Rural e do Mar, Xunta de Galicia, Aptdo 13, 36620 Vilanova de Arousa, Spain. lmartin@cimacoron.org
authors: Laura
authors: L
authors: Martín-Gómez
authors: Antonio
authors: A
authors: Villalba
authors: Maria Jesús
authors: MJ
authors: Carballal
authors: Elvira
authors: E
authors: Abollo
mesh_terms: D000818:Animals; D001483:Base Sequence; D019295:Computational Biology; D018076:DNA, Complementary / Q000235:genetics; D020224:Expressed Sequence Tags; D020869:Gene Expression Profiling; D052138:Genes, Neoplasm / Q000235:genetics*; D008969:Molecular Sequence Data; D009360:Neoplastic Cells, Circulating / Q000473:pathology*; D010125:Ostreidae / Q000235:genetics*; D060888:Real-Time Polymerase Chain Reaction; D017422:Sequence Analysis, DNA
chemical_list: D018076:DNA, Complementary