Project description:Our genome-wide gene expression data indicate that, despite the lack of crypts, the rostral, mid, and caudal portions of the zebrafish intestine have distinct functions analogous to the mammalian small and large intestine, respectively. Organization of ridge structures represents a unique feature of zebrafish intestine, though they produce similar cross sections to mammalian intestines. Evolutionary lack of stomach, crypts, Paneth cells and submucosal glands has shaped the zebrafish intestine into a simpler but unique organ in vertebrate intestinal biology.
Project description:Cyberlindnera jadinii yeast is a potential sustainable novel feed ingredient for aquaculture industries. Yeasts contain bio-active components and proteins such as beta-glucans, mannans, nucleic acids and proteins that can enhance fish immunity against the disease. In our study, we focused on the characterization of intestinal immunoregulatory pathways in zebrafish (Danio rerio) by quantifying the intestine proteins with isobaric tags for relative and absolute quantitation (iTRAQ) and 2D LC-MS/MS approach. Zebrafish were fed either a control diet (C) or a diet supplemented with autolyzed C. jadinii (ACJ). The KEGG pathways analysis revealed that compared with the control diet, the ACJ yeast diet induced an increased abundance of proteins related to arginine and proline metabolism, phagosome, C-lectin receptor signalling pathway, ribosome pathway and PPAR signalling pathway, which can modulate and enhance the innate response of zebrafish. Moreover, fish fed ACJ yeast diet also showed decreased abundance of proteins associated with inflammatory pathways including apoptosis, necroptosis and ferroptosis pathways. These findings support a mobilization of the innate immune response and a control of inflammatory-related pathways in the intestine of zebrafish. Our findings in the well annotated proteome of zebrafish enabled a detailed investigation of intestinal responses and provide insight into the health-beneficial effects of the yeast species C. jadinii relevant for aquaculture species.
Project description:Sequential window acquisition of all theoretical mass spectra (SWATH-MS) requires a spectral library to extract quantitative measurements from the mass spectrometry data acquired in data-independent acquisition mode (DIA). Large combined spectral libraries containing SWATH assays have been generated for humans and several other organisms, but so far no publicly available library exists for measuring the proteome of zebrafish, a rapidly emerging model system in biomedical research. Here, we present a large zebrafish SWATH spectral library to measure the abundance of 104’185 proteotypic peptides from 10’405 proteins. The library includes proteins expressed in 9 different zebrafish tissues (brain, eye, heart, intestine, liver, muscle, ovaries, spleen, and testes) and provides an important new resource to quantify 40% of the protein-coding zebrafish genes.
Project description:Zebrafish organ proteomics was carried out for proteogenomic analysis. High resolution mass spectrometry-based proteomic profiling of 11 adult organs (eye, brain, liver, spleen, intestine-pancreas, ovary, testes, muscle, heart and head) and two developmental stages (embryos 48 and 120 hours post-fertilization) of zebrafish (SAT line) was carried out. Protein extracts were reduced and alkylated (iodoacetamide). Off-loine fractionation was carried out by SDS-PAGE and basic RPLC. MS analysis was cariied on Agilent 6540 Q-TOF. Spleen and Testis samples were also analyzed on Thermo Orbitrap LTQ Velos.
