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Related Concept Videos

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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Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...
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CMT4D (NDRG1 mutation): genotype-phenotype correlations.

Emilie Ricard1, Stéphane Mathis, Corinne Magdelaine

  • 1Service et Laboratoire de Neurologie, Centre de Référence Neuropathies Périphériques Rares, CHU Limoges, Limoges, France.

Journal of the Peripheral Nervous System : JPNS
|September 14, 2013
PubMed
Summary
This summary is machine-generated.

Charcot-Marie-Tooth (CMT) disease, a genetic peripheral neuropathy, was diagnosed in a child with a specific mutation. This finding aids in understanding CMT4D subtypes and the NDRG1 gene

Keywords:
CMT4DCharcot-Marie-Tooth diseaseHSMN-LomNDRG1electron microscopy

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Area of Science:

  • Genetics
  • Neurology
  • Molecular Biology

Background:

  • Charcot-Marie-Tooth (CMT) disease is a group of inherited disorders affecting peripheral nerves, characterized by significant clinical and genetic heterogeneity.
  • Over 40 genes have been implicated in the various forms of CMT, highlighting the complexity of peripheral nerve development and maintenance.

Observation:

  • A case study of a child of gypsy origin presenting with an autosomal recessive demyelinating peripheral neuropathy.
  • Clinical, familial, and electrophysiological data strongly suggested a diagnosis within the CMT4 subtype.

Findings:

  • The specific N-Myc downstream-regulated gene 1 (NDRG1) mutation, p.R148X, was identified, confirming the CMT4D phenotype.
  • This mutation is characteristic of a known cause of demyelinating CMT.

Implications:

  • This case reinforces the genetic basis of CMT4D and the role of the NDRG1 gene.
  • Further research into the molecular function of the NDRG1 protein is warranted to understand its precise role in peripheral nerve health and disease pathogenesis.