Understanding the Molecular Basis of Miller-Dieker Syndrome
Gowthami Mahendran1, Jessica A Brown1
1Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
Abstract:
Miller-Dieker Syndrome (MDS) is a rare neurodevelopmental disorder caused by a heterozygous deletion of approximately 26 genes within the MDS locus of human chromosome 17. MDS, which affects 1 in 100,000 babies, can lead to a range of phenotypes, including lissencephaly, severe neurological defects, distinctive facial abnormalities, cognitive impairments, seizures, growth retardation, and congenital heart and liver abnormalities. One hallmark feature of MDS is an unusually smooth brain surface due to abnormal neuronal migration during early brain development. Several genes located within the MDS locus have been implicated in the pathogenesis of MDS, including PAFAH1B1, YWHAE, CRK, and METTL16. These genes play a role in the molecular and cellular pathways that are vital for neuronal migration, the proper development of the cerebral cortex, and protein translation in MDS. Improved model systems, such as MDS patient-derived organoids and multi-omics analyses indicate that WNT/β-catenin signaling, calcium signaling, S-adenosyl methionine (SAM) homeostasis, mammalian target of rapamycin (mTOR) signaling, Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling, and others are dysfunctional in MDS. This review of MDS integrates details at the clinical level alongside newly emerging details at the molecular and cellular levels, which may inform the development of novel therapeutic strategies for MDS.
Insights
Miller-Dieker Syndrome (MDS) is a rare neurodevelopmental disorder affecting brain development. Research integrates clinical and molecular data to understand its causes and guide new therapies.
Area of Science:
- Genetics and Molecular Biology
- Neuroscience
- Developmental Biology
Background:
- Miller-Dieker Syndrome (MDS) is a rare neurodevelopmental disorder affecting 1 in 100,000 infants.
- Caused by a deletion on chromosome 17, MDS leads to lissencephaly, neurological defects, and distinctive facial features.
- Abnormal neuronal migration, resulting in a smooth brain surface, is a hallmark of MDS.
Purpose of the Study:
- To review and integrate current clinical and molecular understanding of Miller-Dieker Syndrome.
- To highlight key genes and signaling pathways implicated in MDS pathogenesis.
- To inform the development of novel therapeutic strategies for MDS.
Main Methods:
- Review of existing literature on Miller-Dieker Syndrome.
- Analysis of data from patient-derived organoids and multi-omics studies.
- Integration of clinical observations with molecular and cellular findings.
Main Results:
- Identified key genes (e.g., PAFAH1B1, YWHAE) within the MDS locus involved in neuronal migration and cortical development.
- Highlighted the dysfunction of critical signaling pathways including WNT/β-catenin, mTOR, and JAK/STAT.
- Demonstrated the utility of advanced model systems for studying MDS.
Conclusions:
- MDS pathogenesis involves complex molecular and cellular disruptions affecting brain development.
- Understanding these pathways is crucial for developing targeted therapies.
- Further research integrating clinical and molecular data will advance MDS treatment.
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