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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).
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]
Copyright of Marine & Freshwater Behaviour & Physiology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Temperature-dependent expression of melanopsin (opn4) reveals a non-canonical response in adult zebrafish (Danio rerio).
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Sua-Cespedes%2C+Cristhian+D%2E%22">Sua-Cespedes, Cristhian D.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dantas+David%2C+Daniela%22">Dantas David, Daniela</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Souto-Neto%2C+José+A%2E%22">Souto-Neto, José A.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zanetti%2C+Giovanna%22">Zanetti, Giovanna</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Moraes%2C+Maria+Nathália%22">Moraes, Maria Nathália</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Castrucci%2C+Ana+Maria+de+Lauro%22">Castrucci, Ana Maria de Lauro</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Marine+%26+Freshwater+Behaviour+%26+Physiology%22">Marine & Freshwater Behaviour & Physiology</searchLink>. May2025, Vol. 58 Issue 3, p53-63. 11p.
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  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Zebra+danio%22">Zebra danio</searchLink><br /><searchLink fieldCode="DE" term="%22Gene+expression%22">Gene expression</searchLink><br /><searchLink fieldCode="DE" term="%22Opsins%22">Opsins</searchLink><br /><searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Melanopsin%22">Melanopsin</searchLink><br /><searchLink fieldCode="DE" term="%22Brachydanio%22">Brachydanio</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Marine & Freshwater Behaviour & Physiology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1080/10236244.2025.2496143
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        Text: English
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        Type: general
      – SubjectFull: Gene expression
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      – SubjectFull: Opsins
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      – TitleFull: Temperature-dependent expression of melanopsin (opn4) reveals a non-canonical response in adult zebrafish (Danio rerio).
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              Text: May2025
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              Y: 2025
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