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Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

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Published on: August 15, 2019

Genetic Modifiers and Rare Mendelian Disease.

K M Tahsin Hassan Rahit^1,2, Maja Tarailo-Graovac^1,2

¹Departments of Biochemistry, Molecular Biology and Medical Genetics, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.

|February 29, 2020

Summary

Genetic modifiers influence rare Mendelian disease severity. Understanding these genetic interactions is key to explaining varied patient outcomes and improving disease diagnosis.

Keywords:

GWAS bioinformatics expressivity genetic interaction genetic modifier genome sequencing mendelian disease penetrance phenotypic variability rare disease

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Area of Science:

Genetics
Genomics
Medical Genetics

Background:

High-throughput sequencing advances have improved rare Mendelian disease gene discovery.
However, significant gaps remain in linking genomic variations to observed phenotypic outcomes.
Genetic variants rarely act in isolation; other genomic elements can modify disease severity.

Purpose of the Study:

To review current methods for identifying genetic modifiers in rare Mendelian diseases.
To discuss future strategies for understanding gene-environment interactions in disease.
To bridge the gap between variant identification and phenotypic variability.

Main Methods:

Review of existing literature on genetic modifier identification in Mendelian diseases.
Analysis of current genomics approaches and their limitations.
Discussion of emerging methodologies for dissecting genetic interactions.

Main Results:

Genetic modifiers significantly contribute to phenotypic variability in rare diseases.
Current genomics approaches are insufficient to fully capture these complex interactions.
The identification of genetic modifiers is crucial for a comprehensive understanding of disease.

Conclusions:

Understanding genetic modifiers is essential for explaining phenotypic variability in rare Mendelian diseases.
Future research should focus on integrated approaches to study gene-gene and gene-environment interactions.
Developing novel strategies to identify and interpret genetic modifiers will advance precision medicine.