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Author Adeniyi, M.J.; Agoreyo, F.O.; Olorunnisola, O.L.; Olaniyan, O.T.; Seriki, S.A.; Ozolua, P.O.; Odetola, A.A.
Title Photo-pollution disrupts reproductive homeostasis in female rats: The duration-dependent role of selenium administrations Type Journal Article
Year 2020 Publication The Chinese Journal of Physiology Abbreviated Journal Chin J Physiol
Volume 63 Issue 5 Pages 235-243
Keywords Animals; Estrous cycle ratio; follicle-stimulating hormone; luteinizing hormone; photo-pollution; reproductive homeostasis; selenium
Abstract Although selenium is known to be essential for reproductive function, studies have indicated the adverse effect with its prolonged use. The present study investigated the duration-related effect of selenium administrations on reproductive hormones and estrous cycle indices in adult female Wistar rats exposed to a model of light pollution using altered photoperiod (AP). Ninety-six cyclic female Wistar rats displaying 4-5 days' estrous cycle length (ECL) and weighing 148-152 g were randomly divided into short and long experimental cohorts consisting of six groups each and spanning for 1 and 8 weeks, respectively. Each consisted of control, high selenium dose (HSE), low selenium dose (LSE), AP, AP + HSE, and AP + LSE. The rats were orally administered high dose (150 mug/kg) and low dose (100 mug/kg) of sodium selenite once per day. The estrous cycle indices were monitored. Plasma levels of follicle-stimulating hormone, luteinizing hormone (LH), estradiol (E), progesterone (P), prolactin, E/P ratio, and histology of ovary and uterine horn were evaluated. The statistical analysis was performed using Statistical Package for the Social Sciences. In AP rats, HSE and LSE caused no significant effect on LH, E, P, and E/P ratio, ECL, estrus interval (EI), and estrous cycle ratio (ECR). The effect of HSE and LSE on LH, E, P, E/P ratio, and ECL showed no duration-dependent increase, but there was a duration-dependent increase in EI and ECR at low dose. The study indicated that administration of HSE of selenium improved reproductive function in photo-pollution-exposed rats irrespective of the duration of treatment.
Address Department of Anatomy, Edo University Iyamho, Edo State, Nigeria
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ISSN 0304-4920 ISBN Medium
Area Expedition Conference
Notes PMID:33109790 Approved no
Call Number GFZ @ kyba @ Serial (down) 3190
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Author Boom, M.P.; Spoelstra, K.; Biere, A.; Knop, E.; Visser, M.E.
Title Pollination and fruit infestation under artificial light at night:light colour matters Type Journal Article
Year 2020 Publication Scientific Reports Abbreviated Journal Sci Rep
Volume 10 Issue 1 Pages 18389
Keywords Plants; Ecology
Abstract Rapid human population growth and associated urbanization lead to increased artificial illumination of the environment. By changing the natural light-dark cycle, artificial lighting can affect the functioning of natural ecosystems. Many plants rely on insects in order to reproduce but these insects are known to be disturbed by artificial light. Therefore, plant-insect interactions may be affected when exposed to artificial illumination. These effects can potentially be reduced by using different light spectra than white light. We studied the effect of artificial lighting on plant-insect interactions in the Silene latifolia-Hadena bicruris system using a field set-up with four different light treatments: red, green, white and a dark control. We compared the proportion of fertilized flowers and fertilized ovules as well as the infestation of fruits by Hadena bicruris, a pollinating seed predator. We found no difference in the proportion of fertilized flowers among the treatments. The proportion of fruits infested by H. bicruris was however significantly higher under green and white light and a significantly lower proportion of fertilized ovules was found under green light. We show that artificial light with different colours impacts plant-insect interactions differently, with direct consequences for plant fitness.
Address Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6700 AB, Wageningen, The Netherlands. m.visser@nioo.knaw.nl
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Language English Summary Language Original Title
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Series Volume Series Issue Edition
ISSN 2045-2322 ISBN Medium
Area Expedition Conference
Notes PMID:33110135; PMCID:PMC7591485 Approved no
Call Number GFZ @ kyba @ Serial (down) 3189
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Author Palanivel, R.; Vinayachandran, V.; Biswal, S.; Deiuliis, J.A.; Padmanabhan, R.; Park, B.; Gangwar, R.S.; Durieux, J.C.; Ebreo Cara, E.A.; Das, L.; Bevan, G.; Fayad, Z.; Tawakol, A.; Jain, M.K.; Rao, S.; Rajagopalan, S.
Title Exposure to Air Pollution Disrupts Circadian Rhythm Through Alterations in Chromatin Dynamics Type Journal Article
Year 2020 Publication iScience Abbreviated Journal iScience
Volume in press Issue Pages
Keywords Animals
Abstract Particulate matter ≤2.5μm (PM2.5) air pollution is a leading environmental risk factor contributing disproportionately to the global burden of non-communicable disease. We compared impact of chronic exposure to PM2.5 alone, or with light at night exposure (LL) on metabolism. PM2.5 induced peripheral insulin resistance, circadian rhythm (CR) dysfunction, and metabolic and brown adipose tissue (BAT) dysfunction, akin to LL (with no additive interaction between PM2.5 and LL). Transcriptomic analysis of liver and BAT revealed widespread but unique alterations in CR genes, with evidence for differentially accessible promoters and enhancers of CR genes in response to PM2.5 by ATAC-seq. The histone deacetylases 2, 3 & 4, were downregulated with PM2.5 exposure, with increased promoter occupancy by the histone acetyltransferase p300 as evidenced by ChIP-seq. These findings suggest a previously unrecognized role of PM2.5 in promoting CR disruption and metabolic dysfunction through epigenetic regulation of circadian targets.
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ISSN 2589-0042 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial (down) 3188
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Author Hartung, J.
Title Light, puberty, and aggression: A proximal mechanism hypothesis Type Journal Article
Year 1978 Publication Human Ecology Abbreviated Journal Hum Ecol
Volume 6 Issue 3 Pages 273-297
Keywords Human Health
Abstract Rapidly accumulating evidence indicates that light reduces the human pineal's inhibitory effect on the gonads. Artificially extended daily photoperiods, by allowing increased production of gonadal steroids, have probably accentuated the secular growth trend and may be causing males, especially adolescents and young adults, to have an overready hormonal response to situations which elicit aggressive behavior.
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ISSN 0300-7839 ISBN Medium
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Notes Approved no
Call Number GFZ @ kyba @ Serial (down) 3187
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Author Elgert, C.; Lehtonen, T.K.; Kaitala, A.; Candolin, U.
Title Sexual selection for bright females prevails under light pollution Type Journal Article
Year 2020 Publication Current Zoology Abbreviated Journal
Volume in press Issue Pages
Keywords Animals
Abstract We investigated whether artificial light alters sexual selection on signal intensity, in this case glow brightness, in the European common glow-worm (Lampyris noctiluca).
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ISSN 1674-5507 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial (down) 3186
Permanent link to this record