Buscar
Mostrando ítems 1-10 de 80
Light modulates the melanophore response to alpha-MSH in Xenopus laevis: An analysis of the signal transduction crosstalk mechanisms involved
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2010)
Melanin granule (melanosome) dispersion within Xenopus laevis melanophores is evoked either by light or alpha-MSH. We have previously demonstrated that the initial biochemical steps of light and alpha-MSH signaling are ...
The expression of melanopsin and clock genes in Xenopus laevis melanophores and their modulation by melatonin
(Associação Brasileira de Divulgação Científica, 2012)
Vertebrates have a central clock and also several peripheral clocks. Light responses might result from the integration of light signals by these clocks. The dermal melanophores of Xenopus laevis have a photoreceptor molecule ...
Exchange of microtubule molecular motors during melanosome transport in Xenopus laevis melanophores is triggered by collisions with intracellular obstacles
(Humana Press, 2008-12)
The observation that several cargoes move bidirectionally along microtubules in vivo raised the question regarding how molecular motors with opposed polarity coordinate during transport. In this work, we analyzed the switch ...
Regulation of eye and jaw colouration in three-spined stickleback Gasterosteus aculeatus
(2018-01-01)
Fish can change their skin and eye colour for background matching and signalling. Males of Gasterosteus aculeatus develop ornamental blue eyes and a red jaw during the reproductive season, colours that are further enhanced ...
Transcription factor Ap-2 alpha is necessary for development of embryonic melanophores, autonomic neurons and pharyngeal skeleton in zebrafish
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2003-09-35)
The genes that control development of embryonic melanocytes are poorly defined. Although transcription factor Ap-2a is expressed in
neural crest (NC) cells, its role in development of embryonic melanocytes and other neural ...
Endothelin modulates the circadian expression of non-visual opsins
(Maryland Heights, 2014-05-09)
The non-visual opsin, melanopsin, expressed in the mammalian retina, is considered a circadian photo- 24
pigment because it is responsible to entrain the endogenous biological clock. This photopigment is also 25
present ...
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia?
(Elsevier B.V., 2018-01-01)
Body coloration has a fundamental role in animal communication by signaling sex, age, reproductive behavior, aggression, etc. Nile-tilapia exhibits dominance hierarchy and the dominants are paler than subordinates. During ...
Regulation of Melanopsins and Per1 by α-MSH and Melatonin in Photosensitive Xenopus laevis Melanophores
(Hindawi Publishing CorporationNew York, 2014)
α-MSH and light exert a dispersing effect on pigment granules of Xenopus laevis melanophores; however, the intracellular signaling pathways are different. Melatonin, a hormone that functions as an internal signal of darkness ...