Similar Datasets
Project description:Feather evolution enabled feathered dinosaurs and early Mesozoic birds to venture into new ecological niches. Studying how feathers and scales are specified provides insight into how a new organ evolves. We use genome-wide analyses to identify feather-associated genes and test their feather-forming ability by expressing them in chicken and alligator scales. Intermediate morphotypes revealed five cardinal morphogenetic events: localized growth zone, follicle invagination, branching, feather keratin differentiation and dermal papilla formation. In contrast to molecules known to induce feathers on scales (retinoic acid, beta-catenin), we identify novel scale-feather converters (Sox2, Zic1, Grem1, Spry2, Sox18) which induce only one or several of the five regulatory modules. Some morphotypes resemble filamentous appendages found in feathered dinosaur fossils, while others demonstrate some characteristics of modern feathers. We propose that at least five morpho-regulatory modules were used to diversify ancient reptile scales. The regulatory combination and hierarchical integration led to extant feather forms.
2017-12-31 | GSE87139 | GEO
Project description:Feather evolution enabled feathered dinosaurs and early Mesozoic birds to venture into new ecological niches. Studying how feathers and scales are specified provides insight into how a new organ evolves. We use genome-wide analyses to identify feather-associated genes and test their feather-forming ability by expressing them in chicken and alligator scales. Intermediate morphotypes revealed five cardinal morphogenetic events: localized growth zone, follicle invagination, branching, feather keratin differentiation and dermal papilla formation. In contrast to molecules known to induce feathers on scales (retinoic acid, beta-catenin), we identify novel scale-feather converters (Sox2, Zic1, Grem1, Spry2, Sox18) which induce only one or several of the five regulatory modules. Some morphotypes resemble filamentous appendages found in feathered dinosaur fossils, while others demonstrate some characteristics of modern feathers. We propose that at least five morpho-regulatory modules were used to diversify ancient reptile scales. The regulatory combination and hierarchical integration led to extant feather forms.
2017-12-31 | GSE87248 | GEO
Project description:Feather evolution enabled feathered dinosaurs and early Mesozoic birds to venture into new ecological niches. Studying how feathers and scales are specified provides insight into how a new organ evolves. We use genome-wide analyses to identify feather-associated genes and test their feather-forming ability by expressing them in chicken and alligator scales. Intermediate morphotypes revealed five cardinal morphogenetic events: localized growth zone, follicle invagination, branching, feather keratin differentiation and dermal papilla formation. In contrast to molecules known to induce feathers on scales (retinoic acid, beta-catenin), we identify novel scale-feather converters (Sox2, Zic1, Grem1, Spry2, Sox18) which induce only one or several of the five regulatory modules. Some morphotypes resemble filamentous appendages found in feathered dinosaur fossils, while others demonstrate some characteristics of modern feathers. We propose that at least five morpho-regulatory modules were used to diversify ancient reptile scales. The regulatory combination and hierarchical integration led to extant feather forms.
2017-12-31 | GSE87247 | GEO
Project description:ChIP-seq for embryonic chicken feather samples
| PRJNA503262 | ENA
Project description:The molecular mechanism controlling regional specific skin appendage phenotypes is a fundamental question that remains unresolved. We recently identified feather and scale primordium associated genes and with functional studies, proposed five major more modules are involved in scale-to-feather conversion and their integration is essential to form today’s feathers. Yet, how the molecular networks are wired and integrated at the genomic level is still unknown. Here, we combine classical recombination experiments and systems biology technology to explore the molecular mechanism controlling cell fate specification. In the chimeric explant, dermal fate is more stable, while epidermal fate is reprogrammed to be similar to the original appendage type of the mesenchyme. We analyze the transcriptome changes in both scale-to-feather and feather-to-scale transition in the epidermis. We found a highly interconnected regulatory gene network controlling skin appendage types. These gene networks are organized around two molecular hubs, β-catenin and retinoic acid (RA), which can bind to regulatory elements controlling downstream gene expression, leading to scale or feather fates. ATAC sequencing analyses revealed about 1000 altered chromatin opening sites, and they are distributed around. When a key gene is perturbed, many other co-expressed genes in the same module also will be influenced. These findings suggest that these feather / scale fate specification genes form an interconnected network, and rewiring of the gene network can lead to changes of appendage phenotypes. This work shows the key hub positions of Beta catenin and retinoic acid signaling in the hierarchy of the scale / feather fate specification gene networks, opening up new possibilities to understand the control switches of multi-component organ phenotypes.
2018-10-15 | GSE111099 | GEO
Project description:Epithelial appendages are the product of epithelial – mesenchymal interactions. Tissue recombination experiments showed that in general, the dermis determines the phenotype of the epithelial appendage. Chicken dorsal skin epithelium interacts with its underlying mesenchyme to form feathers beginning at E7 (H&H stage 31), while metatarsal scale epithelium interacts with its mesenchyme to form scales beginning at E9 (H&H stage 35) which stabilize around E12 (H&H stage 38). We sought to evaluate the molecular differences of tissues with different competence and inductive abilities to form feathers and scales. Chicken embryos were selected to obtain competent E7 and non-competent at E9 feather forming skin from dorsal. The competent E9 and non-competent E11 meta-tarsal scale forming skin from metatarsal were selected for examing the differences in regional specificity. Epithelium and mesenchyme from each skin were prepared separately. Samples were prepared for RNA extraction and hybridization on Affymetrix microarrays. We gathered 8 sets of samples for the analysis: undifferentiated E7 feather skin epithelium (E7fe) and mesenchyme (E7fm); differentiated E9 feather skin epithelium (E9fe) and mesenchyme (E9fm); undifferentiated E9 scale skin epithelium (E9se) and mesenchyme (E9sm); and differentiated E11 scale skin epithelium (E11se) and mesenchyme (E11sm)
2015-07-01 | E-GEOD-62882 | biostudies-arrayexpress
Project description:Comparison of mRNA profiles in anterior and posterior of chicken dorsal growing feather
2021-02-14 | GSE111008 | GEO
Project description:Many animals can change their coats in response to different ages, sexes, or seasonal environmental changes. The hormones can also alter the size, shape, texture and color of the regenerated coat. Here we propose feather core branching morphogenesis module can be modulated by sex hormone or other environmental factors to change the form, texture or colors, thus generate a large spectrum of complexity for adaptation. We use sexual dimorphisms of the feather coat to explore the role of hormones in in coat morphogenesis and regeneration. A long-standing question is whether the sex-dependent feather morphologies are autonomously controlled by the male or female cell types, or extrinsically controlled and reversible. We have recently identified core feather branching molecular modules which control the anterior-posterior (BMP, Wnt gradient), medio-lateral (retinoic signaling, gremlin), and proximo-distal (sprouty, BMP) patterning of feathers. We hypothesize that modulatory signaling modules can be added upon these core branching modules to topologically tune the dimension of each parameter. Here we explore the involvement of hormones in generating sexual dimorphisms using exogenously delivered hormones. Our strategy is to mimic androgen levels by applying exogenous dihydrotestosterone and aromatase inhibitors to adult females and injecting exogenous estradiol to adult males. We also examine differentially expressed genes in the feathers of wildtype male and female chickens to identify potential downstream modifiers of feather morphogenesis. The data show male and female feather morphology and their color patterns can be modified extrinsically through molting and reseting the stem cell niche during regeneration.
2018-10-15 | GSE120823 | GEO
Project description:Avian feather has robust regeneration capability. Long noncoding RNAs (lncRNAs) are non-protein coding transcripts that are involved in various biological processes. We infected the regenerating feather follicles with lentivirus to over express Wnt5a or knock down two lncRNAs (lnc3501&lnc7831) separately. The regenerated follicles were dissected at 4 days after infection. We compared gene expression of infected follicles with normal T4 control follicles. Our results revealed that lncRNAs may modulate Wnt signaling.
2018-08-10 | GSE118374 | GEO
Project description:Even though feather pecking (FP) in laying hens has been extensively studied, a good solution to prevent chickens from this behavior under commercial circumstances has not been found. Selection against FP behavior is possible, but for a more effective selection across different populations, it is necessary to characterize the genetic mechanism associated with this behavior. In this study, we use a high FP selection line, which has been selected for 8 generations. We present evidence of the presence of a major dominant allele affecting the FP behavior by using an argument based on the presence of mixture in the distribution of the observed FP and by studying the evolution of the proportion of very high FP along the sequence of 8 generations. This hypothesis is further supported by the fact that the gene transcription profile of the birds performing high FP differs from the profile of the other birds performing FP (456 genes differentially expressed from a total of 14,077 investigated genes). Keywords: severe feather pecking , selection , modeling , inheritance pattern From each selection line (high feather pecking line, low feather pecking line and control line) 60 animals were randomly selected. Within each line the birds were randomly assigned to a cage of 20. The cages were kept in a randomized block design. Number of samples analyzed in total: 179 (60 high feather pecking line, 60 low feather pecking line, 59 control line samples. Common reference design using total-RNA purified from brain from a single F1 cross between the high and low feather pecking line as reference.
2009-09-22 | E-GEOD-10380 | biostudies-arrayexpress