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John Abraham: Telomere Biology Disorders – From Bench to Bedside
John Abraham/LinkedIn; Madeline Franke/LinkedIn
Apr 10, 2026, 13:21

John Abraham: Telomere Biology Disorders – From Bench to Bedside

John Abraham, Assistant Professor at Christian Medical College and Hospital, shared a post on Linkedin about a recent article by Madeline Franke et al., published in Haematologica, adding:

“Telomere Biology Disorders (TBD): From Bench to Bedside

Recently revisited an excellent review in Haematologica (March 2026) by Madeline Franke et al., focusing on the diagnosis and management of adult telomere biology disorders.

Here are key takeaways

Core concept

TBD represent inherited defects in telomere maintenance leading to short telomeres, genomic instability, and multisystem disease.

Biology simplified

Telomeres (TTAGGG repeats) plus telomerase plus shelterin complex

  • Maintain chromosomal integrity
  • Progressive shortening triggers cell senescence and malignancy risk

Classification

  • Short telomere syndromes (TBD) – organ failure, aging phenotype
  • Long telomere syndromes (CPLT) – paradoxical increased cancer risk

Genetics

Mutations in key genes (TERT, TERC, DKC1, RTEL1, TINF2)

  • Affect telomerase activity, trafficking, or telomere protection

Clinical spectrum (Adults)

  • Bone marrow failure
  • Interstitial lung disease (often the presenting feature)
  • Liver fibrosis/portal hypertension
  • Premature aging features

Cancer and hematology Risk

  • MDS (approximately 500 fold increase risk)
  • AML (20–70 fold increase risk)
  • Clonal hematopoiesis plays a central role

Adaptive vs maladaptive clones (TP53, U2AF1)

Diagnosis

  • Flow-FISH is clinical gold standard
  • Genetic testing essential
  • Up to 40% may lack identifiable mutations

Unique concepts

  • Genetic anticipation – earlier, more severe disease
  • Phenocopying – TBD phenotype without mutation

Management

  • Androgens (e.g., danazol) – potential telomere elongation (mixed evidence)
  • Transplant remains definitive (HSCT / lung / liver)

Requires reduced-intensity conditioning

Surveillance

  • CBC plus marrow monitoring
  • Cancer screening (H and N, skin, anogenital)
  • Pulmonary and liver evaluation

Multidisciplinary care is key

Future directions

  • Gene editing (ZSCAN4, TINF2)
  • Telomerase-targeted therapies

Early-phase clinical trials underway

Take-home

Think TBD in:

  • Unexplained cytopenias plus ILD plus family history
  • Early greying plus marrow failure
  • ‘Atypical’ MDS/AML in younger patients

Early recognition – better outcomes.”

Title: Diagnosis and management of adult telomere biology disorders

Authors: Madeline Franke, Alejandro Ferrer, Mrinal M. Patnaik

Read the Full Article on Haematologica

John Abraham: Telomere Biology Disorders - From Bench to Bedside

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Alejandro Ferrer bleeding disorders Haematologica Health Hematology Hemostasis Hemostasis News Hemostasis Today John Abraham Madeline Franke Medicine Mrinal M. Patnaik TBD Telomere Biology Disorders
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