Temperature-dependent expression of melanopsin (opn4) reveals a non-canonical response in adult zebrafish (Danio rerio).
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| Title: | Temperature-dependent expression of melanopsin (opn4) reveals a non-canonical response in adult zebrafish (Danio rerio). |
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| Authors: | Sua-Cespedes, Cristhian D. (AUTHOR), Dantas David, Daniela (AUTHOR), Souto-Neto, José A. (AUTHOR), Zanetti, Giovanna (AUTHOR), Moraes, Maria Nathália (AUTHOR), Castrucci, Ana Maria de Lauro (AUTHOR) |
| Source: | Marine & Freshwater Behaviour & Physiology. May2025, Vol. 58 Issue 3, p53-63. 11p. |
| Subjects: | Zebra danio, Gene expression, Opsins, Low temperatures, Melanopsin, Brachydanio |
| Abstract: | Zebrafish (Danio rerio) experience daily temperature variations that align with light–dark cycles. Opsins mediate vision and light perception and can also act as thermosensors. We examined whether low temperature (23°C) modulates melanopsin gene expression in light-exposed and non-exposed organs. At 23°C, the brain showed strong upregulation (~10×) of opn4x1 and opn4x2 during the light phase, and widespread downregulation (~6×) of almost all melanopsin genes during the dark phase. In the eye, opn4m1, opn4m2, and opn4m3 were reduced (~3×) during light phase. Liver melanopsins displayed different expression patterns at 23°C, with up- and downregulation (~10×). All five muscle melanopsins were downregulated (2–10×) at 23°C during the light phase, and opn4m3, opn4x1, and opn4x2 during the dark phase (2–5×). In addition to the photoperiod, we concluded that low temperature also affects melanopsin expression in adult D. rerio, in an organ- and daily time-dependent manner. [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | Zebrafish (Danio rerio) experience daily temperature variations that align with light–dark cycles. Opsins mediate vision and light perception and can also act as thermosensors. We examined whether low temperature (23°C) modulates melanopsin gene expression in light-exposed and non-exposed organs. At 23°C, the brain showed strong upregulation (~10×) of opn4x1 and opn4x2 during the light phase, and widespread downregulation (~6×) of almost all melanopsin genes during the dark phase. In the eye, opn4m1, opn4m2, and opn4m3 were reduced (~3×) during light phase. Liver melanopsins displayed different expression patterns at 23°C, with up- and downregulation (~10×). All five muscle melanopsins were downregulated (2–10×) at 23°C during the light phase, and opn4m3, opn4x1, and opn4x2 during the dark phase (2–5×). In addition to the photoperiod, we concluded that low temperature also affects melanopsin expression in adult D. rerio, in an organ- and daily time-dependent manner. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 10236244 |
| DOI: | 10.1080/10236244.2025.2496143 |
