Project description:This SuperSeries is composed of the following subset Series: GSE21894: Dynamic transcriptomic profiles of zebrafish gills in response to zinc depletion GSE21907: Dynamic transcriptomic profiles of zebrafish gills in response to zinc supplementation. Refer to individual Series
Project description:Zinc deficiency is detrimental to organisms highlighting its role as an essential micronutrient contributing to numerous biological processes. To investigate the underlying molecular events invoked by zinc depletion we performed a temporal analysis of transcriptome changes observed within zebrafish gill. This tissue represents a model system for studying ion absorption across polarised cells as it provides a major pathway for fish to acquire zinc directly from water whilst sharing a conserved zinc transporting system with mammals. Zebrafish were treated with either zinc-depleted (water = 2.61 μg L-1; diet = 26 mg kg-1) or zinc-adequate (water = 16.3 μg L-1; diet = 233 mg kg-1) conditions for two weeks. Gill samples were collected at five time points and transcriptome changes analysed in quintuplicate using a 16K oligonucleotide array. Global transcript levels were measured in zebrafish gills using a oligonucleotide array either zinc-depleted or zinc-adequate diet. Gill samples were collected at five time points and transcriptome changes analysed in quintuplicate using a 16K oligonucleotide array
Project description:Dietary zinc is routinely supplemented to promote growth, boost the immune system, protect against diabetes or aid recovery from diarrhoea. We exploited the zebrafish (Danio rerio) gill as a unique vertebrate ion transporting epithelium model to study the time-dependent regulatory networks of gene-expression leading to homeostatic control during zinc supplementation. This organ forms a conduit for zinc uptake whilst exhibiting conservation of zinc trafficking components. Fish were maintained with zinc supplemented water (4.0 uM) and diet (2023 mg zinc kg-1) or in un-amended water and diet, containing Zn2+ at 0.25 µM and 233 mg zinc kg-1 respectively. Gill tissues were harvested at five time points (8 hours to 14 days) and transcriptome changes analysed in quintuplicate using a 16K microarray. Global transcript levels were measured in zebrafish gills using a oligonucleotide array either zinc-adequate or zinc-supplemented diet. Gill samples were collected at five time points and transcriptome changes analysed in quintuplicate using a 16K oligonucleotide array
Project description:Ambient temperature affects organisms comprehensively, however cold responses are different among tissues. Here, we adopt a transcript screening approach to explore and compare the cold responses in zebrafish gills and brain. Zebrafish were exposed to cold and the oligonucleotide-based microarray was used to identify cold-induced genes. Principle component analysis (PCA) of the gene expression profiles indicated that gills develop different strategies for the increasing of exposure period while brain relatively remained stable. Combining statistic and clustering methods, we found that gills showed higher protein metabolism and cell activity while brain showed higher stress responses and detoxification during cold acclimation. According to the microarray data sets, we extended the study on ionocyte- and isotocin neuron-related genes in gills and brain, respectively, and found these genes were broadly stimulated by cold. These data suggest that cold activates specific physiological functions in different tissues. Taken together, our results provide molecular evidences to elucidate the cold acclimation in zebrafish gills and brain. Keywords: Time course, Tissue types
Project description:The effect of dietary immunostimulation in the portals of entry, intestine and gills, of rainbow trout (Oncorhynchus mykiss), was investigated using a salmonid-specific microarray platform enriched with immune-related genes. IS-diet feeding significantly changed transcriptomic expression profiles: larger reduction rather than induction was observed, with significant changes in genes and functional GO categories related to remodeling processes and antigen presentation. The results revealed that one of the main effects of IS-diets in trout is the increase of genes involved in antigen recognition in epithelial cells of gills. Keywords: gills, intestine, immunostimulats, transcriptomic response, ISH, trout
Project description:Rainbow trout (Oncorhynchus mykiss) were fed during 4 weeks with either a control diet or an immunostimulant diet and then injected with LPS to investigate the effect of dietary immunostimulation in the portals of entry, intestine and gills, using a salmonid-specific microarray platform enriched with immune-related genes. IS-diet feeding significantly changed transcriptomic expression profiles in response to LPS: significant changes in genes and functional GO categories related to remodeling processes and antigen presentation were different for both diets. The results revealed that one of the main effects of IS-diets in trout is the increase of genes involved in antigen recognition and in adaptive immunity. Keywords: gills, intestine, immunostimulats, transcriptomic response, trout
Project description:How novel structures arise during evolution has long fascinated biologists. A dramatic example is how the diminutive bones of the mammalian middle ear arose from ancestral fish jawbones1. In contrast, the evolutionary origins of the outer ear, another mammalian innovation, remain a mystery, in part because it is supported by non-mineralized elastic cartilage rarely recovered in fossils. Whether the outer ear arose de novo or through reuse of ancestral developmental programs is unknown. Here we show that the outer ear shares gene regulatory programs with the gills of fishes and amphibians for both its initial outgrowth and later development of elastic cartilage. Comparative single-nuclei multiomics of the human outer ear and zebrafish gills reveals conserved gene expression and putative enhancers enriched for common transcription factor binding motifs. This is reflected by transgenic activity of human outer ear enhancers in gills, and fish gill enhancers in the outer ear. Further, single-cell multiomics of the cartilaginous book gills of horseshoe crabs reveal a shared DLX-mediated gill program with vertebrates, with a book gill distalless enhancer driving expression in zebrafish gills. We propose that elements of an invertebrate gill program were reutilized in vertebrates to generate first gills and then the outer ear.
Project description:How novel structures arise during evolution has long fascinated biologists. A dramatic example is how the diminutive bones of the mammalian middle ear arose from ancestral fish jawbones. In contrast, the evolutionary origins of the outer ear, another mammalian innovation, remain a mystery, in part because it is supported by non-mineralized elastic cartilage rarely recovered in fossils. Whether the outer ear arose de novo or through reuse of ancestral developmental programs is unknown. Here we show that the outer ear shares gene regulatory programs with the gills of fishes and amphibians for both its initial outgrowth and later development of elastic cartilage. Comparative single-nuclei multiomics of the human outer ear and zebrafish gills reveals conserved gene expression and putative enhancers enriched for common transcription factor binding motifs. This is reflected by transgenic activity of human outer ear enhancers in gills, and fish gill enhancers in the outer ear. Further, single-cell multiomics of the cartilaginous book gills of horseshoe crabs reveal a shared DLX-mediated gill program with vertebrates, with a book gill distalless enhancer driving expression in zebrafish gills. We propose that elements of an invertebrate gill program were reutilized in vertebrates to generate first gills and then the outer ear.