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相关概念视频

Incomplete Dominance01:43

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.

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狗RNF170单基删除在人类神经轴突变的自然发生模型中.

Shawna R Cook1, Cleo Schwarz2, Julien Guevar3

  • 1Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.

Movement disorders : official journal of the Movement Disorder Society
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概括

迷你美国牧羊犬的一种基因突变导致神经轴突变 (NAD),这是一个渐进的神经系统疾病. 这一发现为人类性残症-85建立了一个有价值的狗模型,有助于未来的治疗研究.

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科学领域:

  • 兽医神经学 兽医神经学
  • 遗传学 遗传学 是一个
  • 神经退行性疾病 神经退行性疾病

背景情况:

  • 神经轴突变 (NAD) 是一组遗传性神经退行性疾病,其特征是中枢神经系统中的轴突球体.
  • 在人类中,NAD具有临床和遗传异质性,并且在像狗这样的大型动物模型中观察到.
  • 在迷你美国牧羊犬 (MAS) 中的一种新型,渐进的神经退行性综合征被通过组织病理学诊断为NAD.

研究的目的:

  • 描述马斯犬中NAD的临床和病理特征.
  • 为了确定这种狗神经退行性疾病的遗传基础.
  • 为人类神经退行性疾病建立一个相关的大型动物模型.

主要方法:

  • 对受影响的狗进行临床和死后检查.
  • 全基因组关联研究 (GWAS) 和自性映射.
  • 全基因组测序以确定引起的遗传变异.

主要成果:

  • 受影响的MAS犬表现出骨盆四肢疲弱和动脉缩,表明异常的步态.
  • 确定了RNF170基因中的1个基对删除是原因,以自身相对递归模式分离.
  • 预计已识别的RNF170删除会导致RNF170蛋白质的框架转移和过早切断.

结论:

  • 狗的NAD表型与人类自身遗传性倒退性性-85 (SPG85) 有相似之处,与RNF170变体有关.
  • 这种MAS NAD模型为研究人类神经退行性疾病提供了一个有价值的平台,因为它具有遗传相似性和狗的寿命相对较长.
  • 已建立的犬类模型为相关的人类疾病提供了临床前治疗试验的机会.