Results 131 to 140 of about 19,208 (245)

Unmasking the Desert Phantom: Genetic Evidence Does Not Support the Validity of the Enigmatic Boehme's Horned Viper

Zoologica Scripta, Volume 54, Issue 6, Page 817-822, November 2025.
ABSTRACT The viperid genus Cerastes contains four desert‐adapted species distributed throughout the Saharo‐Arabian arid belt that are typically associated with loose sands. Cerastes boehmei is restricted to one locality in Tunisia and is known only from the holotype.
Vojtěch Waldhauser, Theo Busschau, Gabriel Mochales‐Riaño, Sebastian Scholz, Fernando Martínez‐Freiría, Stephane Boissinot, Salvador Carranza, Andreas Schmitz, Jiří Šmíd   +8 more
wiley   +1 more source

Testing whether macroevolution follows microevolution: Are colour differences among swans (Cygnus) attributable to variation at the MC1R locus?

BMC Evolutionary Biology, 2008
Background The MC1R (melanocortin-1 receptor) locus underlies intraspecific variation in melanin-based dark plumage coloration in several unrelated birds with plumage polymorphisms.
Pointer Marie A, Mundy Nicholas I
doaj   +1 more source

Regulation of Melanogenesis in Skin Epidermal Keratinocytes via Activation of α7 Nicotinic Acetylcholine Receptor on the Expression of α‐Melanocyte‐Stimulating Hormone

The FASEB Journal, Volume 39, Issue 20, 31 October 2025.
α7 nAChR modulates UVB‐induced α‐MSH production during melanogenesis. UVB irradiation induces DNA damage in epidermal keratinocytes, causing upregulation of POMC transcription via the increase of its transcription factor p53, which in turn leads to elevated α‐MSH mastering melanin synthesis in epidermal melanocytes.
Maggie Suisui Guo, Xiaoyang Wang, Yingjie Xia, Jiahui Wu, Ajiaikebaier Dilidaer, Jin Gao, Tina Tingxia Dong, Karl Wah Keung Tsim   +7 more
wiley   +1 more source

Pigmentary Markers in Danes--Associations with Quantitative Skin Colour, Nevi Count, Familial Atypical Multiple-Mole, and Melanoma Syndrome.

PLoS ONE, 2016
To investigate whether pigmentation genes involved in the melanogenic pathway (melanogenesis) contributed to melanoma predisposition, we compared pigmentary genetics with quantitative skin pigmentation measurements, the number of atypical nevi, the total
Peter Johansen, Jeppe Dyrberg Andersen, Linnea Nørgård Madsen, Henrik Ullum, Martin Glud, Claus Børsting, Robert Gniadecki, Niels Morling   +7 more
doaj   +1 more source

Dorsal Pigmentation and Its Association with Functional Variation in MC1R in a Lizard from Different Elevations on the Qinghai–Tibetan Plateau

Genome Biology and Evolution, 2020
Identification of the role of the MC1R gene has provided major insights into variation in skin pigmentation in several organisms, including humans, but the evolutionary genetics of this variation is less well established.
Yuanting Jin, Haojie Tong, G. Shao, Jiasheng Li, Yudie Lv, Yubin Wo, Richard P. Brown, Caiyun Fu   +7 more
semanticscholar   +1 more source

Bayesian inference of natural selection from allele frequency time series

, 2016
The advent of accessible ancient DNA technology now allows the direct ascertainment of allele frequencies in ancestral populations, thereby enabling the use of allele frequency time series to detect and estimate natural selection.
Evans, Steven N., Schraiber, Joshua G., Slatkin, Montgomery   +2 more
core   +1 more source

Mechanism of Mitf inhibition and morphological differentiation effects of hirsein A on B16 melanoma cells revealed by DNA microarray [PDF]

, 2012
BackgroundWe have previously reported that hirsein A inhibits melanogenesis in B16 melanoma cells by downregulating the Mitf gene expression.ObjectiveIn this study, microarray was employed to determine the transcriptional response of B16 cells to hirsein
Han Junkyu, Ikuta Kenjiro, Isoda Hiroko, Villareal Myra O., 礒田 博子, 韓 畯奎   +5 more
core   +1 more source

The Effect Estrogen and Testosterone on the Expression of Melanogenesis-related Genes in Korean Brindle Cattle

Journal of Animal Reproduction and Biotechnology, 2018
The purpose of this study is to expression pattern of melanogenesis associate genes on cultured melanocyte layer cells in Korean Brindle Cattle(Dark, Brindle and Yellow) were analyzed to evaluate the effects of sex hormones on the control of ...
Hui-Gyeong Seo, Ji-Hye Lee, Sang-Hwan Kim, Ho-Jun Lee, Jong-Taek Yoon   +4 more
doaj   +1 more source

Interaction between the melanocortin 1 receptor (MC1R) and agouti signalling protein genes (ASIP), and their association with black and brown coat colour phenotypes in peruvian alpaca

Italian Journal of Animal Science, 2020
The aim of this work was to assess the interaction between MC1R and ASIP genes in determining coat colour variation in black and brown Peruvian alpacas. Skin biopsies were collected from 25 black alpacas and 15 brown alpacas.
Stefano Pallotti, Bathrachalam Chandramohan, Dario Pediconi, Cristina Nocelli, Antonietta La Terza, Carlo Renieri   +5 more
doaj   +1 more source

Sequence Variation of Melanocortin 1 Receptor (MC1R) Gene and Association with Plumage Color in Domestic Geese

The Journal of Poultry Science, 2014
In contrast to other domestic and wild animals, the genetic variation of MC1R gene and association with plumage color has not been investigated in domestic goose.
Jing Huang, Bing Zhou, Da-Qian He, Shi-Yi Chen, Qing Zhu, Yong-Gang Yao, Yi-Ping Liu   +6 more
doaj   +1 more source