Development of Melanin-Bearing Pigment Cells in Birds and Mammals

Heinz, Andreas; Debbache, Julien

doi:10.1007/978-981-16-1490-3_6

Cited by 3 publications

(2 citation statements)

References 65 publications

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“…In mammals, hair pigmentation is derived from melanocytes within the hair bulb, with melanosomes being transferred to the keratinocytes that generate the hair shaft (reviewed in [49,[91][92][93]). At each hair molt cycle, the hair shaft is regenerated from new keratinocytes derived from keratinocyte stem cells, and melanin is supplied de novo by new melanocytes generated from melanocyte stem cells (MSCs), retained in the hair bulge.…”

Section: Broad Multipotency Of Melanocyte Stem Cellsmentioning

confidence: 99%

Cell Fate Decisions in the Neural Crest, from Pigment Cell to Neural Development

Dawes

Kelsh

2021

IJMS

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The neural crest shows an astonishing multipotency, generating multiple neural derivatives, but also pigment cells, skeletogenic and other cell types. The question of how this process is controlled has been the subject of an ongoing debate for more than 35 years. Based upon new observations of zebrafish pigment cell development, we have recently proposed a novel, dynamic model that we believe goes some way to resolving the controversy. Here, we will firstly summarize the traditional models and the conflicts between them, before outlining our novel model. We will also examine our recent dynamic modelling studies, looking at how these reveal behaviors compatible with the biology proposed. We will then outline some of the implications of our model, looking at how it might modify our views of the processes of fate specification, differentiation, and commitment.

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Section: Broad Multipotency Of Melanocyte Stem Cellsmentioning

confidence: 99%

Cell Fate Decisions in the Neural Crest, from Pigment Cell to Neural Development

Dawes

Kelsh

2021

IJMS

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“…Abnormal coloration in birds is a consequence of inadequate pigment deposition resulting from melanin cell damage or mutations, including melanin defects in cell development, synthesis, or type produced (van Grouw, 2021 ). Melanin pigments are produced in melanocytes derived from melanoblasts through a complex array of signaling pathways that involve various genes and proteins (Arnheiter & Debbache, 2021 ; Wakamatsu & Ito, 2021 ). Hypopigmentation (i.e., lighter pigmentation) can be further divided into subcategories, such as albinism (the absence of tyrosinase in pigment cells, resulting in all‐white plumage, red eyes, and pink bill and feet; in avians it is the only form of color aberration that impacts eyesight; van Grouw, 2021 ), leucism (caused by a neural crest disorder leading to the absence of melanin cells in some or all areas of the body, resulting in all‐white or white spotting of plumage and in some cases pink feet and bill; van Grouw, 2021 ), and dilution (resulting from melanin being abnormally deposited in the cells, turning black/blue into silver/gray and red/yellow into buff/cream; the majority of dilution variants show normal coloration of feet and bill; van Grouw, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Color aberration in malachite kingfishers: Insights from community science observations in Queen Elizabeth National Park, Uganda

Warner,

Weiss,

Allen

2024

Ecology and Evolution

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Color aberrations in birds corresponds with important ecological functions, including thermoregulation and physiological impacts, camouflage and increased predation, and social interactions with conspecifics. Color aberrations in birds have been reported frequently in the scientific literature, but aberrations in many species remain undocumented or understudied. We investigated records of leucism in malachite kingfishers (Corythornis cristatus) from observations of community scientists on iNaturalist and eBird in Uganda. Leucistic kingfishers were only observed within the Queen Elizabeth National Park (QENP), Uganda. When considering all observations of malachite kingfishers that included photographs within the QENP, leucistic individuals accounted for 13.0% and 10.4% of total malachite kingfisher observations within the study area from iNaturalist and eBird, respectively. Leucistic observations were recorded from September 2015 through February 2017, making up 60.0% and 68.2% of observations of malachite kingfishers within the study area from iNaturalist and eBird during that time, respectively. The localized and short documentation period suggests observations represent a single individual, while the high observation rate likely corresponds with collection bias due to the novelty of the individual. Our findings help to better understand the ecological importance and potential consequences for color‐aberrant individuals, although color aberration did not appear to inhibit our subject's ability to find a mate. Our work also highlights how participatory science can promote the documentation of color‐aberrant individuals in wild populations, although it poses challenges when trying to estimate abundance.

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Piebaldism and Chromatophore Development in Reptiles is Linked to the <i>TFEC</i> Gene

et al. 2022

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Development of Melanin-Bearing Pigment Cells in Birds and Mammals

Cited by 3 publications

References 65 publications

Cell Fate Decisions in the Neural Crest, from Pigment Cell to Neural Development

Cell Fate Decisions in the Neural Crest, from Pigment Cell to Neural Development

Color aberration in malachite kingfishers: Insights from community science observations in Queen Elizabeth National Park, Uganda

Piebaldism and Chromatophore Development in Reptiles is Linked to the <i>TFEC</i> Gene

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