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Multi-Omics Approach Reveals Genes and Pathways Affected in Miller-Dieker Syndrome.

Gowthami Mahendran1, Kurtis Breger1, Phillip J McCown1,2

  • 1Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA.

Molecular Neurobiology
|November 7, 2024
PubMed
Summary

Miller-Dieker syndrome (MDS) is a rare neurogenetic disorder. This study reveals molecular pathways and identifies METTL16 as a potential therapeutic target to restore cellular functions in MDS patients.

Keywords:
DEGsGene expressionMDSMETTL16ProteomicsTranscriptomicsmTOR

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Area of Science:

  • Neurogenetics
  • Molecular Biology
  • Genomics

Background:

  • Miller-Dieker syndrome (MDS) is a severe neurogenetic disorder caused by deletions in the MDS locus on chromosome 17.
  • MDS is associated with high in utero mortality and limited lifespan, with current treatments focusing on symptom management.
  • A deeper molecular understanding of MDS pathogenesis is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the molecular underpinnings of Miller-Dieker syndrome at the RNA and protein levels.
  • To identify specific genes, signaling pathways, and cellular processes affected in MDS.
  • To explore potential therapeutic targets for MDS.

Main Methods:

  • RNA sequencing and mass spectrometry were performed on cells from an MDS patient and a healthy control.
  • Differential gene expression analysis was conducted at both RNA and protein levels.
  • Functional assays were used to validate observed cellular defects, including calcium signaling, protein translation, and cell migration.

Main Results:

  • Identified differentially expressed genes (DEGs) linked to MDS phenotypes, signaling, and nervous system development.
  • Confirmed enhanced calcium signaling, reduced protein translation, and impaired cell migration in MDS cells.
  • Overexpression of METTL16 (Methyltransferase-like protein 16) rescued protein translation, mTOR pathway regulation, and cell migration defects in MDS cells.

Conclusions:

  • This study elucidates key molecular pathways and gene expression changes contributing to Miller-Dieker syndrome.
  • METTL16 emerges as a promising therapeutic target for restoring cellular functions in MDS.
  • Findings pave the way for developing more precise medical interventions for MDS patients.