title: Modifications in the proteome of rainbow trout (Oncorhynchus mykiss) embryo and fry as an effect of triploidy induction.
abstract: Two-dimensional gel electrophoresis (2-DE), matrix-assisted laser desorption/ionization tandem time-of-flight (MALDI-TOF/TOF) mass spectrometry, and database searching were used to analyze the effects of triploidization heat shock treatment on protein expression in rainbow trout eyed embryo and fry. After fertilization, the eggs were incubated at 10 °C for 10 min. Half of the eggs were then subjected to heat shock for 10 min submerged in a 28 °C water bath to induce triploidy. The remainder was incubated normally and used as diploid controls. Specimens of eyed embryos and fry were taken on 18 and 76 days post-fertilization, respectively. In the eyed embryo extracts, seven protein spots were significantly changed in abundance between the control and heat-shocked groups and one of these was decreased while the others were increased in the heat shock-treated group. Of the spots that were shown to change in abundance in the eyed embryos with heat shock treatment, two were identified as vitellogenin, while the others were creatine kinase and angiotensin I. In the 2-DE from the fry muscle extraction, 23 spots were significantly changed in abundance between the diploid and triploid groups. Nineteen of these showed a decreased abundance in diploids, while the remaining four spots had an increased abundance. Triploidization caused differential expression of muscle metabolic proteins including triosephosphate isomerase, glyceraldehyde-3-phosphate dehydrogenase, and beta-enolase. Myosin heavy chain as a structural protein was also found to change in abundance in triploids. The altered expression of both structural and metabolic proteins in triploids was consistent with their increased cell size and lower growth performance.
authors.affiliation: Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Khouzestan, Iran.
authors.forename: Samad Bahrami
authors.initials: SB
authors.lastname: Babaheydari
authors.affiliation: Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Khouzestan, Iran. Keyvan56@yahoo.com.
authors.forename: Saeed
authors.initials: S
authors.lastname: Keyvanshokooh
authors.affiliation: Department of Natural Resources, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
authors.forename: Salar
authors.initials: S
authors.lastname: Dorafshan
authors.affiliation: Department of Fisheries, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Kurdistan, Iran.
authors.forename: Seyed Ali
authors.initials: SA
authors.lastname: Johari
mesh_terms: D000818:Animals; D015180:Electrophoresis, Gel, Two-Dimensional; D029941:Fish Proteins / Q000378:metabolism*; D017686:Oncorhynchus mykiss / Q000196:embryology / Q000235:genetics / Q000378:metabolism; D020543:Proteome; D057885:Triploidy
chemical_list: D029941:Fish Proteins; D020543:Proteome
keywords: Embryo; Fry; Heat shock treatment; Proteomics; Rainbow trout; Triploid