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Vinogradova, I.A.; Anisimov, V.N.; Bukalev, A.V.; Semenchenko, A.V.; Zabezhinski, M.A. |
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Circadian disruption induced by light-at-night accelerates aging and promotes tumorigenesis in rats |
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Journal Article |
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2009 |
Publication |
AGING |
Abbreviated Journal |
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10 |
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1 |
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855-865 |
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Animals; light-at-night; life span; tumorigenesis; rats |
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We evaluated the effect of various light/dark regimens on the survival, life span and tumorigenesis in rats. Two hundred eight male and 203 females LIO rats were subdivided into 4 groups and kept at various light/dark regimens: standard 12:12 light/dark (LD); natural lighting of the North-West of Russia (NL); constant light (LL), and constant darkness (DD) since the age of 25 days until natural death. We found that exposure to NL and LL regimens accelerated development of metabolic syndrome and spontaneous tumorigenesis, shortened life span both in male and females rats as compared to the standard LD regimen. We conclude that circadian disruption induced by light-at-night accelerates aging and promotes tumorigenesis in rats. This observation supports the conclusion of the International Agency Research on Cancer that shift-work that involves circadian disruption is probably carcinogenic to humans. |
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LoNNe @ christopher.kyba @ |
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403 |
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Kuijper, D.P.J.; Schut, J.; van Dullemen, D.; Toorman, H.; Goossens, N.; Ouwehand, J.; Limpens, H.J.G.A. |
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Experimental evidence of light disturbance along the commuting routes of pond bats (Myotis dasycneme) |
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2008 |
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Lutra |
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51 |
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1 |
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37-49 |
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Animals; ecological connectivity; conservation; illumination; foraging; turning behaviour |
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LoNNe @ christopher.kyba @ |
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404 |
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Bachleitner, W.; Kempinger, L.; Wülbeck, C.; Rieger, D.; Helfrich-Förster, C. |
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Moonlight shifts the endogenous clock of Drosophila melanogaster |
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2007 |
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PNAS |
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104 |
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9 |
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3538–3543 |
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Animals; circadian rhythm; dual; oscillator model; PERIOD; synchronization; TIMELESS |
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The ability to be synchronized by light–dark cycles is a fundamental property of circadian clocks. Although there are indications that circadian clocks are extremely light-sensitive and that they can be set by the low irradiances that occur at dawn and dusk, this has not been shown on the cellular level. Here, we demonstrate that a subset of Drosophila's pacemaker neurons responds to nocturnal dim light. At a nighttime illumination comparable to quarter-moonlight intensity, the flies increase activity levels and shift their typical morning and evening activity peaks into the night. In parallel, clock protein levels are reduced, and clock protein rhythms shift in opposed direction in subsets of the previously identified morning and evening pacemaker cells. No effect was observed on the peripheral clock in the eye. Our results demonstrate that the neurons driving rhythmic behavior are extremely light-sensitive and capable of shifting activity in response to the very low light intensities that regularly occur in nature. This sensitivity may be instrumental in adaptation to different photoperiods, as was proposed by the morning and evening oscillator model of Pittendrigh and Daan. We also show that this adaptation depends on retinal input but is independent of cryptochrome. |
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LoNNe @ christopher.kyba @ |
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405 |
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Nowinszky, L. |
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Title |
Nocturnal illumination and night flying insects |
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2004 |
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APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH |
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2 |
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1 |
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17–52 |
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Animals; light-trap; collecting distance; Babinet-point; moon phases |
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The present study discusses the light trapping of insects depending on the environmental illumination, twilight polarization phenomena and the moon phases. The trapping data were taken of Hungarian national light-trap network. The important results are the followings: The Babinet-point, a polarization free spot of the sky at twilight, can be a role of orientation of insects. The height of the Moon above
the horizon is in negative correlation with the number of the caught insects. The maximum individual
number of species was collected at various moon phases. |
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LoNNe @ christopher.kyba @ |
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407 |
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Moore, M.V.; Pierce, S.M.; Walsh, H.M.; Kvalvik, S.K.; Lim, J.D. |
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Title |
Urban light pollution alters the diel vertical migration of Daphnia |
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2000 |
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Verh. Internat. Verein. Limnol |
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27 |
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1-4 |
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Animals |
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LoNNe @ christopher.kyba @ |
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408 |
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