Mutations in PNPLA6 are linked to photoreceptor degeneration and various forms of childhood blindness.

Mutations in PNPLA6 are linked to photoreceptor degeneration and various forms of childhood blindness.
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PNPLA6中的突变与感光受体变性和各种形式的儿童失明有关。

DOI:
10.1038/ncomms6614
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发表时间:
2015-01-09
影响因子:
16.6
通讯作者:
Koenekoop, R. K.
Koenekoop, R. K.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kmoch, S.;Majewski, J.;Ramamurthy, V.;Cao, S.;Fahiminiya, S.;Ren, H.;MacDonald, I. M.;Lopez, I.;Sun, V.;Keser, V.;Khan, A.;Stranecky, V.;Hartmannova, H.;Pristoupilova, A.;Hodanova, K.;Piherova, L.;Kuchar, L.;Baxova, A.;Chen, R.;Barsottini, O. G. P.;Pyle, A.;Griffin, H.;Splitt, M.;Sallum, J.;Tolmie, J. L.;Sampson, J. R.;Chinnery, P.;Banin, E.;Sharon, D.;Dutta, S.;Grebler, R.;Helfrich-Foerster, C.;Pedroso, J. L.;Kretzschmar, D.;Cayouette, M.;Koenekoop, R. K.

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视网膜变性导致的失明影响着全世界数百万人,但许多致病突变仍然未知。 PNPLA6 编码含有蛋白 6 的 patatin 样磷脂酶结构域,也称为神经病靶标酯酶 (NTE),它是有毒有机磷酸酯的靶标,可诱导人类因大神经元的严重轴突病而瘫痪。 PNPLA6 突变还会导致人类痉挛性截瘫,其特征是运动神经元变性。在这里,我们鉴定了七个视网膜变性家庭(包括莱伯先天性黑蒙和奥利弗·麦克法兰综合征)导致儿童失明的 PNPLA6 突变。 PNPLA6 主要定位于光感受器的内段质膜,果蝇 PNPLA6 的突变导致光感受器细胞死亡。我们还报告说,突变果蝇中的溶血磷脂酰胆碱和溶血磷脂酸水平升高。这些发现显示了 PNPLA6 在光感受器存活中的作用,并将磷脂代谢确定为某些形式失明的潜在治疗靶点。
Blindness due to retinal degeneration affects millions of people worldwide, but many disease-causing mutations remain unknown. PNPLA6 encodes the patatin-like phospholipase domain containing protein 6, also known as neuropathy target esterase (NTE), which is the target of toxic organophosphates that induce human paralysis due to severe axonopathy of large neurons. Mutations in PNPLA6 also cause human spastic paraplegia characterized by motor neuron degeneration. Here we identify PNPLA6 mutations in childhood blindness in seven families with retinal degeneration, including Leber congenital amaurosis and Oliver McFarlane syndrome. PNPLA6 localizes mostly at the inner segment plasma membrane in photo-receptors and mutations in Drosophila PNPLA6 lead to photoreceptor cell death. We also report that lysophosphatidylcholine and lysophosphatidic acid levels are elevated in mutant Drosophila. These findings show a role for PNPLA6 in photoreceptor survival and identify phospholipid metabolism as a potential therapeutic target for some forms of blindness.
由于神经病靶酯酶突变引起的运动神经元疾病:人类受试者的成纤维细胞的酶分析可洞悉发病机理。
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