Motility phenotype in a zebrafish vmat2 mutant.

Motility phenotype in a zebrafish vmat2 mutant.
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DOI:
10.1371/journal.pone.0259753
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
Karlsson KÆ
Karlsson KÆ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Sveinsdóttir HS;Decker A;Christensen C;Lucena PB;Þorsteinsson H;Richert E;Maier VH;Cornell R;Karlsson KÆ

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在本研究中,我们描述了一种新的斑马鱼溶质载体18 A2(slc 18 a2)突变体,也称为囊泡单胺转运蛋白2(vmat 2),其表现出与人类帕金森病部分一致的行为表型。在受精后6天,行为进行了分析,并证明,vmat 2纯合突变幼虫,相对于野生型,显示在运动的光运动测定,改变睡眠参数,并减少多巴胺细胞数量的变化。在突然熄灯刺激后,突变体幼虫开始更大的运动,但随后抑制它们在较小程度上相比,野生型幼虫。相反,在光照期间,突变体幼虫运动迟缓。趋触性,一种避免行为竞技场中心的偏好,在纯合子中比杂合子和野生型增加,白天睡眠比例也是如此。此外,在普拉克索或L-多巴中孵育突变幼虫部分挽救了运动表型,就像将胶质细胞源性神经营养因子(GDNF)注射到它们的大脑中一样。这种新的vmat 2模型代表了一种用于高通量药物筛选新疗法的工具,特别是那些增加单胺转运的药物,以及用于研究单胺转运蛋白的功能。
In the present study, we characterize a novel zebrafish mutant of solute carrier 18A2 (slc18a2), also known as vesicular monoamine transporter 2 (vmat2), that exhibits a behavioural phenotype partially consistent with human Parkinson´s disease. At six days-post-fertilization, behaviour was analysed and demonstrated that vmat2 homozygous mutant larvae, relative to wild types, show changes in motility in a photomotor assay, altered sleep parameters, and reduced dopamine cell number. Following an abrupt lights-off stimulus mutant larvae initiate larger movements but subsequently inhibit them to a lesser extent in comparison to wild-type larvae. Conversely, during a lights-on period, the mutant larvae are hypomotile. Thigmotaxis, a preference to avoid the centre of a behavioural arena, was increased in homozygotes over heterozygotes and wild types, as was daytime sleep ratio. Furthermore, incubating mutant larvae in pramipexole or L-Dopa partially rescued the motor phenotypes, as did injecting glial cell-derived neurotrophic factor (GDNF) into their brains. This novel vmat2 model represents a tool for high throughput pharmaceutical screens for novel therapeutics, in particular those that increase monoamine transport, and for studies of the function of monoamine transporters.
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