Targeted Next Generation Sequencing and Diagnosis of Congenital Hemolytic Anemias: A Three Years Experience Monocentric Study

Elisa Fermo, Cristina Vercellati, Anna Paola Marcello, Ebru Yilmaz Keskin, Silverio Perrotta, Anna Zaninoni, Valentina Brancaleoni, Alberto Zanella, Juri A. Giannotta, Wilma Barcellini, Paola Bianchi

Research output: Contribution to journalArticlepeer-review

Abstract

Congenital hemolytic anemias (CHAs) are heterogeneous and rare disorders caused by alterations in structure, membrane transport, metabolism, or red blood cell production. The pathophysiology of these diseases, in particular the rarest, is often poorly understood, and easy-to-apply tools for diagnosis, clinical management, and patient stratification are still lacking. We report the 3-years monocentric experience with a 43 genes targeted Next Generation Sequencing (t-NGS) panel in diagnosis of CHAs; 122 patients from 105 unrelated families were investigated and the results compared with conventional laboratory pathway. Patients were divided in two groups: 1) cases diagnosed with hematologic investigations to be confirmed at molecular level, and 2) patients with unexplained anemia after extensive hematologic investigation. The overall sensitivity of t-NGS was 74 and 35% for families of groups 1 and 2, respectively. Inside this cohort of patients we identified 26 new pathogenic variants confirmed by functional evidence. The implementation of laboratory work-up with t-NGS increased the number of diagnoses in cases with unexplained anemia; cytoskeleton defects are well detected by conventional tools, deserving t-NGS to atypical cases; the diagnosis of Gardos channelopathy, some enzyme deficiencies, familial siterosterolemia, X-linked defects in females and other rare and ultra-rare diseases definitely benefits of t-NGS approaches.

Original languageEnglish
Article number684569
JournalFrontiers in Physiology
Volume12
DOIs
Publication statusPublished - May 21 2021

Keywords

  • congenital hemolytic anemia
  • differential diagnosis
  • pathogenic variants
  • red blood cells
  • targeted-NGS

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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