Abstract
Follicular fluid provides the microenvironment within which somatic cells proliferate and differentiate, and the oocyte matures. It contains a number of soluble factors implicated in various stages of follicular development, most of them being functionally unknown. The presence of several high-abundance proteins, mainly originating from the blood circulation, is a major challenge of follicular fluid proteomic analysis, as these proteins can mask or decrease the visualization of follicle-specific proteins. In this study, we evaluated the efficiency of two immunodepletion columns (ProteomeLab™ IgY-HSA and MARS-6) on follicular fluids of human, porcine and canine prior to 2D-PAGE. Our results showed that both columns were suitable to remove some of the high-abundance proteins present in human and canine follicular fluid. In conclusion, we demonstrated that the immunodepletion strategy enables the detection of new protein spots, increases resolution and highly improves the intensity of low-abundance proteins by 2D-PAGE.
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