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Rare genetic disorders: Beyond whole-exome sequencing.

Muhammad Umair1,2

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Whole exome sequencing aids in diagnosing rare genetic disorders, but many patients remain undiagnosed. Advanced techniques like long-read sequencing and transcriptomics offer further diagnostic potential for complex cases.

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Area of Science:

  • Genetics
  • Genomics
  • Molecular Diagnostics

Background:

  • Whole exome sequencing (WES) is a standard clinical tool for diagnosing rare and complex genetic disorders.
  • Despite WES's utility, a significant number of patients remain undiagnosed, highlighting the need for advanced diagnostic approaches.

Purpose of the Study:

  • To explore advanced molecular techniques beyond standard WES for diagnosing previously undiagnosed genetic disorders.
  • To identify novel strategies for improving diagnostic yields in complex and rare genetic conditions.

Main Methods:

  • Review of advanced sequencing and multi-omics technologies.
  • Discussion of techniques including structural variant analysis, short tandem repeat (STR) analysis, long-read sequencing, pangenomics, proteomics, and transcriptomics.

Main Results:

  • Standard WES may not detect all genetic variations, necessitating complementary methods.
  • Advanced techniques can uncover different types of genetic alterations, potentially resolving previously undiagnosed cases.

Conclusions:

  • Integrating diverse molecular techniques can enhance the diagnostic resolution for patients with rare and complex genetic disorders.
  • Further research and clinical implementation of these advanced methods are crucial for improving patient care and treatment strategies.