The signaling pathway in photoresponses that may be mediated by visual pigments in erythrophores of Nile tilapia

Ban, Eiko; Kasai, Akiko; Sato, Minami; Yokozeki, Akemi; Hisatomi, Osamu; Oshima, Nobuyuki

doi:10.1111/j.1600-0749.2005.00267.x

Cited by 37 publications

(39 citation statements)

References 44 publications

(51 reference statements)

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“…However, extraocular photoreceptors can also express opsins identical to those in the retina and may potentially use visual phototransductive pathways. Examples of these include rhodopsin in the light organ and parolfactory vesicles of squids and cone opsins in the dermis of fish (Hara and Hara, 1980;Tong et al, 2009;Ban et al, 2005;Kasai and Oshima, 2006;Chen et al, 2013). Nile tilapia (Oreochromis niloticus) and neon tetra (Paracheirodon innesi) are particularly notable, because opsins identical to those in the retina play a role in initiating signals that result in expansion and contraction of pigment cells (chromatophores) or modulation of the color reflected from iridophores.…”

Section: Introductionmentioning

confidence: 99%

Visual phototransduction components in cephalopod chromatophores suggest dermal photoreception

Kingston

Kuzirian

Hanlon

et al. 2015

Journal of Experimental Biology

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Cephalopod mollusks are renowned for their colorful and dynamic body patterns, produced by an assemblage of skin components that interact with light. These may include iridophores, leucophores, chromatophores and (in some species) photophores. Here, we present molecular evidence suggesting that cephalopod chromatophores -small dermal pigmentary organs that reflect various colors of light -are photosensitive. RT-PCR revealed the presence of transcripts encoding rhodopsin and retinochrome within the retinas and skin of the squid Doryteuthis pealeii, and the cuttlefish Sepia officinalis and Sepia latimanus. In D. pealeii, G qα and squid TRP channel transcripts were present in the retina and in all dermal samples. Rhodopsin, retinochrome and G qα transcripts were also found in RNA extracts from dissociated chromatophores isolated from D. pealeii dermal tissues. Immunohistochemical staining labeled rhodopsin, retinochrome and G qα proteins in several chromatophore components, including pigment cell membranes, radial muscle fibers, and sheath cells. This is the first evidence that cephalopod dermal tissues, and specifically chromatophores, may possess the requisite combination of molecules required to respond to light.

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Section: Introductionmentioning

confidence: 99%

Visual phototransduction components in cephalopod chromatophores suggest dermal photoreception

Kingston

Kuzirian

Hanlon

et al. 2015

Journal of Experimental Biology

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“…Their ability to respond to incident light varies in a species-specific manner and also depends on developmental stage (Naora et al, 1988;Moriya et al, 1996;Oshima et al, 1998;Chen et al, 2014). Like other photoreceptors, chromatophore photosensitivity is proposed to be associated with the expression of opsin-based photopigments within cells (Ban et al, 2005). Using molecular approaches, opsin expression has been identified in tissues containing chromatophores and in pigment cell lines (Miyashita et al, 2001;Kasai and Oshima, 2006;Im et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Independent of wavelength, the black pigments (melanosomes) of melanophores tend to disperse and melanophores maintain dispersion state by shuffling pigment granules (Chen et al, 2013). By contrast, the aggregations and dispersion of red pigment (erythrosomes) of erythrophores are induced in different spectral ranges (Ban et al, 2005;Chen et al, 2013). Both visual and non-visual photopigments have been identified within isolated chromatophores and in tissues containing chromatophores (Provencio et al, 1998;Kasai and Oshima, 2006).…”

Section: Introductionmentioning

confidence: 96%

“…Both visual and non-visual photopigments have been identified within isolated chromatophores and in tissues containing chromatophores (Provencio et al, 1998;Kasai and Oshima, 2006). Opsins are thought to initiate phototransduction by the regulation of intracellular cAMP level through G s and G i proteins, leading to pigment dispersion and aggregation, respectively (Ban et al, 2005). However, the downstream components of the signalling pathway have not been identified.…”

Section: Introductionmentioning

confidence: 99%

“…neurohormones) or external stimuli (e.g. light), chromatophores are able to make rapid, remarkable colour changes (Mäthger et al, 2003;Ban et al, 2005;Chen et al, 2013;Nilsson Sköld et al, 2013). For example, intrinsically photosensitive dermal chromatophores of the Nile tilapia Oreochromis niloticus demonstrate distinct photoresponses (Chen et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Functional characterisation of the chromatically antagonistic photosensitive mechanism of erythrophores in the tilapiaOreochromis niloticus

Chen

Xiao

Troje

et al. 2015

Journal of Experimental Biology

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Non-visual photoreceptors with diverse photopigments allow organisms to adapt to changing light conditions. Whereas visual photoreceptors are involved in image formation, non-visual photoreceptors mainly undertake various non-image-forming tasks. They form specialised photosensory systems that measure the quality and quantity of light and enable appropriate behavioural and physiological responses. Chromatophores are dermal non-visual photoreceptors directly exposed to light and they not only receive ambient photic input but also respond to it. These specialised photosensitive pigment cells enable animals to adjust body coloration to fit environments, and play an important role in mate choice, camouflage and ultraviolet (UV) protection. However, the signalling pathway underlying chromatophore photoresponses and the physiological importance of chromatophore colour change remain under-investigated. Here, we characterised the intrinsic photosensitive system of red chromatophores (erythrophores) in tilapia. Like some nonvisual photoreceptors, tilapia erythrophores showed wavelengthdependent photoresponses in two spectral regions: aggregations of inner pigment granules under UV and short-wavelengths and dispersions under middle-and long-wavelengths. The action spectra curve suggested that two primary photopigments exert opposite effects on these lightdriven processes: SWS1 (short-wavelength sensitive 1) for aggregations and RH2b (rhodopsin-like) for dispersions. Both western blot and immunohistochemistry showed SWS1 expression in integumentary tissues and erythrophores. The membrane potential of erythrophores depolarised under UV illumination, suggesting that changes in membrane potential are required for photoresponses. These results suggest that SWS1 and RH2b play key roles in mediating intrinsic erythrophore photoresponses in different spectral ranges and this chromatically dependent antagonistic photosensitive mechanism may provide an advantage to detect subtle environmental photic change.

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Comparison of vertebrate skin structure at class level: A review

Akat

Yenmiş

Pombal

et al. 2022

The Anatomical Record

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The skin is a barrier between the internal and external environment of an organism. Depending on the species, it participates in multiple functions. The skin is the organ that holds the body together, covers and protects it, and provides communication with its environment. It is also the body's primary line of defense, especially for anamniotes. All vertebrates have multilayered skin composed of three main layers: the epidermis, the dermis, and the hypodermis. The vital mission of the integument in aquatic vertebrates is mucus secretion. Cornification began in apmhibians, improved in reptilians, and endured in avian and mammalian epidermis. The feather, the most ostentatious and functional structure of avian skin, evolved in the Mesozoic period. After the extinction of the dinosaurs, birds continued to diversify, followed by the enlargement, expansion, and diversification of mammals, which brings us to the most complicated skin organization of mammals with differing glands, cells, physiological pathways, and the evolution of hair. Throughout these radical changes, some features were preserved among classes such as basic dermal structure, pigment cell types, basic coloration genetics, and similar sensory features, which enable us to track the evolutionary path. The structural and physiological properties of the skin in all classes of vertebrates are presented. The purpose of this review is to go all the way back to the agnathans and follow the path step by step up to mammals to provide a comparative large and updated survey about vertebrate skin in terms of morphology, physiology, genetics, ecology, and immunology.

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The signaling pathway in photoresponses that may be mediated by visual pigments in erythrophores of Nile tilapia

Cited by 37 publications

References 44 publications

Visual phototransduction components in cephalopod chromatophores suggest dermal photoreception

Visual phototransduction components in cephalopod chromatophores suggest dermal photoreception

Functional characterisation of the chromatically antagonistic photosensitive mechanism of erythrophores in the tilapiaOreochromis niloticus

Comparison of vertebrate skin structure at class level: A review

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