Implications of a cheliceral axial duplication in Tetragnatha versicolor (Araneae: Tetragnathidae) for arachnid deuterocerebral appendage development

2021 ◽  
Author(s):  
Darko D. Cotoras ◽  
Pedro de S. Castanheira ◽  
Prashant P. Sharma
Keyword(s):  
Appendage Development ◽  
Tetragnatha Versicolor

scholarly journals p63 in Skin Appendage Development

Cell Cycle ◽  
2007 ◽  
Vol 6 (3) ◽  
pp. 285-290 ◽  
Author(s):  
Marja L. Mikkola
Keyword(s):  
Appendage Development ◽  
Skin Appendage

scholarly journals Transcriptome analysis reveals the genetic basis underlying the development of skin appendages and immunity in hedgehog(Atelerix albiventris)

2020 ◽  
Author(s):  
Hui-Ming Li ◽  
Bi-Ze Yang ◽  
Xiu-Juan Zhang ◽  
Hai-Ying Jiang ◽  
Lin-Miao Li ◽  
...  
Keyword(s):  
Genetic Basis ◽  
Enrichment Analysis ◽  
Differentially Expressed ◽  
Mammal Species ◽  
Appendage Development ◽  
Skin Appendage ◽  
Hair Type ◽  
Spine Development ◽  
Skin Appendages ◽  
Development And Differentiation

Abstract Background: The expression of hair features is an evolutionary adaptation resulting from interactions between many organisms and their environment. Elucidation of the mechanisms that underlie the expression of such traits is a topic in evolutionary biology research; however, the genetic basis of skin appendage development and differentiation remains poorly understood. Therefore, we assessed the de novo transcriptome of the hedgehog ( Atelerix albiventris ) at three developmental stages and compared gene expression profiles between abdomen hair and dorsal spine tissues. Results: We identified 328,576 unigenes in our transcriptome, among which 3,598 were differentially expressed between hair- and spine-type tissues. We identified 3 keratin genes related to hair and spine development through comparative analysis of tissues before and after growth of skin appendages. Dorsal and abdomen skin tissues 5 days after birth were compared and the resulting differentially expressed genes (DEGs) were mainly enriched in keratin filament, intermediate filament, epithelium cell differentiation, and epidermis development based on GO enrichment analysis, and tight junction, p53, and cell cycle signaling pathways based on KEGG enrichment analysis. Expression variations of MBP8, SFN, Wnt10, KRT1 , and KRT2 may be the main factors regulating hair and spine differentiation for the hedgehog. Strikingly, DEGs in hair-type tissues were also significantly enriched in immune-related terms and pathways with hair-type tissues exhibiting more upregulated immune genes than spine-type tissues. Thus, we propose that spine development was an adaptation that provided protection against injuries or stress and reduced hedgehog vulnerability to infection. Conclusion: Our study provided a list of potential genes involved in the regulation of skin appendage development and differentiation in A. albiventris . This is the first transcriptome survey of hair traits for a non-model mammal species, and the candidate genes provided here may provide valuable information for further studies of skin appendages and skin disorder treatments.

Infundibura, a new hyphomycete with unique appendages

1981 ◽  
Vol 59 (4) ◽  
pp. 542-546 ◽  
Author(s):  
T. R. Nag Raj ◽  
B. Kendrick
Keyword(s):  
The Novel ◽  
Appendage Development ◽  
Apical Appendage

A new hyphomycete is described with gelatinous, sporodochioid conidiomata; holoblastic-solitary conidia with a characteristic basal footlike process, a funnel-shaped, mucoid, apical appendage, and a terete, mucoid basal appendage. The novel mode of appendage development by gelatinization of predetermined areas of conidium wall and significance in conidium secession and dispersal are examined.

Roles of TGFβ signaling in epidermal/appendage development

2003 ◽  
Vol 14 (2) ◽  
pp. 99-111 ◽  
Author(s):  
Allen G. Li ◽  
Maranke I. Koster ◽  
Xiao-Jing Wang
Keyword(s):  
Tgfβ Signaling ◽  
Appendage Development

scholarly journals The homeobox gene Distal-less induces ventral appendage development in Drosophila

1997 ◽  
Vol 11 (17) ◽  
pp. 2259-2271 ◽  
Author(s):  
N. Gorfinkiel ◽  
G. Morata ◽  
I. Guerrero
Keyword(s):  
Homeobox Gene ◽  
Appendage Development

scholarly journals Latent developmental potential to form limb-like skeletal structures in zebrafish

2018 ◽  
Author(s):  
M. Brent Hawkins ◽  
Katrin Henke ◽  
Matthew P. Harris
Keyword(s):  
Knockout Mice ◽  
Long Bones ◽  
Common Pathway ◽  
Developmental Processes ◽  
Developmental Potential ◽  
Appendage Development ◽  
Activating Mutations ◽  
Pectoral Fins ◽  
Hox Code ◽  
Many Core

AbstractThe evolution of fins into limbs was a key transition in vertebrate history. A hallmark of this transition is the addition of multiple long bones to the proximal-distal axis of paired appendages. Whereas limb skeletons are often elaborate and diverse, teleost pectoral fins retain a simple endoskeleton. Fins and limbs share many core developmental processes, but how these programs were reshaped to produce limbs from fins during evolution remains enigmatic. Here we identify zebrafish mutants that form supernumerary long bones along the proximal-distal axis of pectoral fins with limb-like patterning. These new skeletal elements are integrated into the fin, as they are connected to the musculature, form joints, and articulate with neighboring bones. This phenotype is caused by activating mutations in previously unrecognized regulators of appendage development, vav2 and waslb, which we show function in a common pathway. We find that this pathway functions in appendage development across vertebrates, and loss of Wasl in developing limbs results in patterning defects identical to those seen in Hoxall knockout mice. Concordantly, formation of supernumerary fin long bones requires the function of hoxall paralogs, indicating developmental homology with the forearm and the existence of a latent functional Hox code patterning the fin endoskeleton. Our findings reveal an inherent limb-like patterning ability in fins that can be activated by simple genetic perturbation, resulting in the elaboration of the endoskeleton.

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