Dietary protein ingested before and during short photoperiods makes an impact on affect-related behaviours and plasma composition of amino acids in mice.

Dietary protein ingested before and during short photoperiods makes an impact on affect-related behaviours and plasma composition of amino acids in mice.
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在短光周期之前和期间摄入的膳食蛋白质会对小鼠的情绪相关行为和血浆氨基酸组成产生影响。

DOI:
10.1017/s0007114515003396
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发表时间:
2015
影响因子:
3.6
通讯作者:
Yasuo S
Yasuo S
中科院分区:
医学3区
文献类型:
--
作者:
Otsuka T;Goda R;Iwamoto A;Kawai M;Shibata S;Oka Y;Mizunoya W;Furuse M1;Yasuo S

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在哺乳动物中,短光周期与高度抑郁和焦虑样行为有关,大脑中5-羟色胺及其前体色氨酸(Trp)水平较低。由于大脑中的色氨酸水平受其与循环中大分子中性氨基酸(Trp:LNAA)的比率的调节,因此本研究阐明了在短日照条件下,不同蛋白质来源的饮食是否会影响C57BL/6J小鼠的抑郁和焦虑样行为。在酪蛋白饮食的对照组小鼠中,SD组小鼠在旷场测试(OFT)中在中心区花费的时间比长日照条件下的小鼠短,这表明SD暴露会诱导焦虑样行为。SD引起的焦虑样行为可以通过在SD下给予α-乳清蛋白饮食来对抗。在过渡到SD之前吃面筋的小鼠,在SD状态下在OFT中央区域花费的时间比SD对照组小鼠要长。或者,与SD对照组相比,在过渡到SD之前摄入大豆蛋白的小鼠在强迫游泳测试中的不动能力更低,这是一种类似抑郁的行为。Trp:LNAA分析显示,SD对照组的Trp:LNAA低于LD对照组,SD组的Trp:LNAA被SD下的α-乳清蛋白饲料抵消。此外,在过渡到SD之前,服用面筋或大豆蛋白的小鼠在SD状态下显示出较高的血浆Trp:LNAA水平。总而言之,在与光周期转换相关的不同时间摄入特定蛋白质可能会调节焦虑和/或抑郁样行为,部分是通过血浆Trp:LNAA的变化。
In mammals, short photoperiod is associated with high depression- and anxiety-like behaviours with low levels of the brain serotonin and its precursor tryptophan (Trp). Because the brain Trp levels are regulated by its ratio to large neutral amino acids (Trp:LNAA) in circulation, this study elucidated whether diets of various protein sources that contain different Trp:LNAA affect depression- and anxiety-like behaviours in C57BL/6J mice under short-day conditions (SD). In the control mice on a casein diet, time spent in the central area in the open field test (OFT) was lower in the mice under SD than in those under long-day conditions (LD), indicating that SD exposure induces anxiety-like behaviour. The SD-induced anxiety-like behaviour was countered by an α-lactalbumin diet given under SD. In the mice that were on a gluten diet before transition to SD, the time spent in the central area in the OFT under SD was higher than that in the SD control mice. Alternatively, mice that ingested soya protein before the transition to SD had lower immobility in the forced swim test, a depression-like behaviour, compared with the SD control. Analysis of Trp:LNAA revealed lower Trp:LNAA in the SD control compared with the LD control, which was counteracted by an α-lactalbumin diet under SD. Furthermore, mice on gluten or soya protein diets before transition to SD exhibited high Trp:LNAA levels in plasma under SD. In conclusion, ingestion of specific proteins at different times relative to photoperiodic transition may modulate anxiety- and/or depression-like behaviours, partially through changes in plasma Trp:LNAA.
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