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The cutaneous stress response system in three-spined stickleback and European flounder exposed to oxidative stress: Different mode of action
This study investigates the mode of action of CSRS in two teleost species of different biology and skin characteristics, the three-spined stickleback and the European flounder, after exposure to oxidative stress induced by a potassium dichromate solution. The cutaneous stress response system presents different ways of action in two studied species: Mel concentration increases in the skin of both species, but cortisol concentration increases in the skin only in sticklebacks. Data suggest that stickleback skin cells can produce cortisol. However, cortisol is not involved in the response to oxidative stress in flounders. In s...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - August 4, 2023 Category: Physiology Authors: Konrad Pomianowski Magdalena Gozdowska Ewa Soko łowska Ewa Kulczykowska Source Type: research

Does exposure to moonlight affect day/night changes in melatonin and metabolic parameters in Amazonian fish?
Comp Biochem Physiol A Mol Integr Physiol. 2023 Jul 18:111489. doi: 10.1016/j.cbpa.2023.111489. Online ahead of print.ABSTRACTLunar cycle modulates the rhythmic activity patterns of many animals, including fish. The effect of the moonlight cycle on daily melatonin and metabolic parameters was evaluated in matrinxã (Brycon amazonicus) subjected to external natural lighting. Eighty juvenile were distributed in 4 tanks of 1m3 (20 fish/tank) and divided into two groups. One group was exposed to the full moon and the other group to the new moon for 30 days, which corresponds to the duration of the lunar period. At the end of t...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - July 20, 2023 Category: Physiology Authors: Ana Caroliny Cerdeira Lopes Bruno Olivetti de Mattos Jaydione Luiz Marcon Luisa Mar ía Vera Jos é Fernando López-Olmeda Francisco Javier S ánchez-Vázquez Tha ís Billalba Carvalho Source Type: research

Short daylight photoperiod alleviated alarm substance-stimulated fear response of zebrafish
In this study, adult zebrafish males and females (Danio rerio) were exposed to different photoperiods, Blank (12 h light: 12 h dark), Control (12 h light: 12 h dark), Short daylight (SD, 6 h light: 18 h dark) and Long daylight (LD, 18 h light: 6 h dark) for 28days. After exposure, fear response of the fish was investigated using a novel tank diving test. After alarm substance administration, the onset to higher half, total duration in lower half and duration of freezing in SD-fish were significantly decreased, suggesting that short daylight photoperiod is capable of alleviating fear response in zebrafish. In contrast, comp...
Source: General and Comparative Endocrinology - March 20, 2023 Category: Endocrinology Authors: Mei-Ling Tan Cheng-Ting Xie Xin Tu Ying-Wen Li Qi-Liang Chen Yan-Jun Shen Zhi-Hao Liu Source Type: research

Dietary supplements and bleeding
In conclusion, physicians must be aware of the potential anticoagulant effects of these supplements. It is imperative to report dietary and herbal supplement usage to physicians and is best to discontinue nonessential supplement use 2 weeks prior to surgery.PMID:36304597 | PMC:PMC9586694 | DOI:10.1080/08998280.2022.2121575
Source: Baylor University Medical Center Proceedings - October 28, 2022 Category: Universities & Medical Training Authors: Jess Hatfield Saadeddine Saad Chad Housewright Source Type: research

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