Molecular mechanisms involved in Atlantic halibut (Hippoglossus hippoglossus) egg quality: impairments at transcription and protein folding levels induce inefficient protein and energy homeostasis during early development

Abstract

BackgroundReproductive success and normal development in all animals are dependent on egg quality and developmental competence of the produced embryo. This study employed tandem mass tags labeling based liquid chromatography tandem mass spectrometry for egg proteomic profiling to investigate differences in the global proteome of good versus poor quality Atlantic halibut eggs at 1-cell stage post fertilization. ResultsA total of 115 proteins were found to be differentially abundant between good and poor quality eggs. Frequency distribution of these proteins revealed higher protein folding activity in good quality eggs in comparison to higher transcription and protein degradation activities in poor quality eggs (p 0.05) between good and bad quality eggs at both 1 hpf and 24 hpf stages. ConclusionOverall evidence from this study indicate that poor quality eggs undergo impairments at both transcription and translation level leading to endoplasmic reticulum and mitochondrial deficiencies. Additional research may be required to expediate the details and the potential of these impairments occurring in different species. Nonetheless, this study will pave the way for future research and will help in acceleration of recent advances in the field of embryonic developmental competence of living organisms.