Photoperiodic and light spectral conditions which inhibit circulating concentrations of thyroxine in the male hamster

M. K. Vaughan; G. C. Brainard; R. J. Reiter

doi:10.1016/0024-3205(85)90327-3

Photoperiodic and light spectral conditions which inhibit circulating concentrations of thyroxine in the male hamster

M. K. Vaughan, G. C. Brainard, R. J. Reiter

Department of Cell Systems & Anatomy

Producción científica: Article › revisión exhaustiva

5 Citas (Scopus)

Resumen

Adult male Syrian hamsters were exposed daily for 12 weeks to 11 h/day of cool white fluorescent light (350 ± 50 μW/cm²) followed by an additional 3 h of near ultraviolet (339-317 nm), blue (435-500 nm), green (515-550 nm), yellow (558-636 nm) or red (653-668 nm) light at an irradiance of 0.2 μW/cm² or to total darkness. Animals exposed to the wavelengths between 558-668 nm (yellow or red half peak bandwidths) or those receiving a total of 13 h of darkness/day had suppressed circulating levels of thyroxine (T₄), a depressed free T₄ index (FT₄I) and a higher T₃/T₄ ratio compared to animals receiving a total of 14 h of white light (350 ± 50 μW/cm²). These results suggest that specific wavelengths of light can affect the neuroendocrine-thyroid axis.

Idioma original	English (US)
Páginas (desde-hasta)	2183-2188
Número de páginas	6
Publicación	Life Sciences
Volumen	36
N.º	23
DOI	https://doi.org/10.1016/0024-3205(85)90327-3
Estado	Published - jun 10 1985

ASJC Scopus subject areas

General Pharmacology, Toxicology and Pharmaceutics
General Biochemistry, Genetics and Molecular Biology

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10.1016/0024-3205(85)90327-3

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title = "Photoperiodic and light spectral conditions which inhibit circulating concentrations of thyroxine in the male hamster",

abstract = "Adult male Syrian hamsters were exposed daily for 12 weeks to 11 h/day of cool white fluorescent light (350 ± 50 μW/cm2) followed by an additional 3 h of near ultraviolet (339-317 nm), blue (435-500 nm), green (515-550 nm), yellow (558-636 nm) or red (653-668 nm) light at an irradiance of 0.2 μW/cm2 or to total darkness. Animals exposed to the wavelengths between 558-668 nm (yellow or red half peak bandwidths) or those receiving a total of 13 h of darkness/day had suppressed circulating levels of thyroxine (T4), a depressed free T4 index (FT4I) and a higher T3/T4 ratio compared to animals receiving a total of 14 h of white light (350 ± 50 μW/cm2). These results suggest that specific wavelengths of light can affect the neuroendocrine-thyroid axis.",

author = "Vaughan, {M. K.} and Brainard, {G. C.} and Reiter, {R. J.}",

note = "Funding Information: This work was supported by NSF grant #PCM8003441. The authors w~sh to thank the Durotest Corporation for the donation of the fluorescent light used ~n the present study.",

year = "1985",

month = jun,

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doi = "10.1016/0024-3205(85)90327-3",

language = "English (US)",

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AU - Vaughan, M. K.

AU - Brainard, G. C.

AU - Reiter, R. J.

N1 - Funding Information: This work was supported by NSF grant #PCM8003441. The authors w~sh to thank the Durotest Corporation for the donation of the fluorescent light used ~n the present study.

PY - 1985/6/10

Y1 - 1985/6/10

N2 - Adult male Syrian hamsters were exposed daily for 12 weeks to 11 h/day of cool white fluorescent light (350 ± 50 μW/cm2) followed by an additional 3 h of near ultraviolet (339-317 nm), blue (435-500 nm), green (515-550 nm), yellow (558-636 nm) or red (653-668 nm) light at an irradiance of 0.2 μW/cm2 or to total darkness. Animals exposed to the wavelengths between 558-668 nm (yellow or red half peak bandwidths) or those receiving a total of 13 h of darkness/day had suppressed circulating levels of thyroxine (T4), a depressed free T4 index (FT4I) and a higher T3/T4 ratio compared to animals receiving a total of 14 h of white light (350 ± 50 μW/cm2). These results suggest that specific wavelengths of light can affect the neuroendocrine-thyroid axis.

AB - Adult male Syrian hamsters were exposed daily for 12 weeks to 11 h/day of cool white fluorescent light (350 ± 50 μW/cm2) followed by an additional 3 h of near ultraviolet (339-317 nm), blue (435-500 nm), green (515-550 nm), yellow (558-636 nm) or red (653-668 nm) light at an irradiance of 0.2 μW/cm2 or to total darkness. Animals exposed to the wavelengths between 558-668 nm (yellow or red half peak bandwidths) or those receiving a total of 13 h of darkness/day had suppressed circulating levels of thyroxine (T4), a depressed free T4 index (FT4I) and a higher T3/T4 ratio compared to animals receiving a total of 14 h of white light (350 ± 50 μW/cm2). These results suggest that specific wavelengths of light can affect the neuroendocrine-thyroid axis.

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Photoperiodic and light spectral conditions which inhibit circulating concentrations of thyroxine in the male hamster

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