人DFNX1耳聋Prps1 p.Ala87Thr敲入模型的建立及听觉表型表征

IF 2.3 3区 医学 Q2 GENETICS & HEREDITY
Denise Yan, M'hamed Grati, Rahul Mittal, Yi-Zhou Quan, Wan Du, Zheng-Yi Chen, Xue Zhong Liu
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引用次数: 0

摘要

磷酸核糖焦磷酸合成酶(PRPS1)基因的变异已被证明可导致人类x连锁非综合征性听力损失(HL) (DFNX1)。PRPS1中的c.259G>A转变导致p.Ala87Thr,已被证明可导致HL。本研究的目的是产生带有Prps1错义变体p.a ala87thr的转基因敲入(KI)小鼠,并研究其对听觉表型的影响。与野生型(WT)对照相比,转基因Prps1 KI小鼠在4-12周龄时开始表现出32 kHz的HL,到48周龄时HL扩展到8和16 kHz。在48周龄时,转基因KI小鼠的毛细胞数量和螺旋神经节神经元(SGN)计数显著减少。这些特征可能与bac依赖的线粒体凋亡程序有关,该程序由氧化应激触发,并已被确定为C57BL/6J小鼠年龄相关性HL的关键机制。酶分析显示,与WT动物相比,KI中Prps1酶活性显著降低。Prps1 p.Ala87Thr KI小鼠模型将作为开发治疗策略以减轻与Prps1变异相关的HL的有价值的工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Generation and Auditory Phenotypic Characterization of Prps1 p.Ala87Thr Mouse Knock-In Model for Human DFNX1 Deafness.

Variants in the phosphoribosylpyrophosphate synthetase (PRPS1) gene have been shown to cause X-linked nonsyndromic hearing loss (HL) (DFNX1) in humans. A c.259G>A transition in PRPS1, which leads to p.Ala87Thr, has been demonstrated to cause HL. The aim of this study was to generate a transgenic knock-in (KI) mouse with the Prps1 missense variant p.Ala87Thr and to study its impact on the auditory phenotype. Compared to wild-type (WT) control, transgenic Prps1 KI mice started to exhibit HL at 32 kHz at 4-12 weeks of age, with HL extending to 8 and 16 kHz by 48 weeks of age. A significant decrease in the number of hair cells and spiral ganglion neuron (SGN) counts was observed at 48 weeks of age in transgenic KI mice. These traits may be associated with the Bak-dependent mitochondrial apoptosis program, which is triggered by oxidative stress and has been identified as a key mechanism of age-related HL in C57BL/6J mice. Enzymatic assay showed a significant reduction in Prps1 enzymatic activity in KI compared to WT animals. The Prps1 p.Ala87Thr KI mouse model will serve as a valuable tool for developing therapeutic strategies to mitigate HL associated with PRPS1 variants.

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来源期刊
Clinical Genetics
Clinical Genetics 医学-遗传学
CiteScore
6.50
自引率
0.00%
发文量
175
审稿时长
3-8 weeks
期刊介绍: Clinical Genetics links research to the clinic, translating advances in our understanding of the molecular basis of genetic disease for the practising clinical geneticist. The journal publishes high quality research papers, short reports, reviews and mini-reviews that connect medical genetics research with clinical practice. Topics of particular interest are: • Linking genetic variations to disease • Genome rearrangements and disease • Epigenetics and disease • The translation of genotype to phenotype • Genetics of complex disease • Management/intervention of genetic diseases • Novel therapies for genetic diseases • Developmental biology, as it relates to clinical genetics • Social science research on the psychological and behavioural aspects of living with or being at risk of genetic disease
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