Clonal hematopoiesis: elements associated with clonal expansion and diseases

Area of Science:

• Hematology
• Genetics
• Immunology

Background:

• Clonal hematopoiesis (CH) is the expansion of mutated hematopoietic stem cells, increasingly recognized in aging populations.
• CH affects up to 84% of individuals aged 70 years and older.
• Beyond hematological malignancies, CH is linked to cardiovascular and kidney diseases.

Purpose of the Study:

• To review current understanding of CH, focusing on genetic/molecular mechanisms.
• To explore the roles of DNMT3A, TET2, and ASXL1 mutations in CH.
• To discuss CH's systemic impact, inflammation, and therapeutic strategies.

Main Methods:

• Comprehensive literature review of genetic, molecular, and clinical studies on CH.
• Analysis of recent advances in understanding CH pathogenesis and progression.
• Synthesis of findings on CH-associated diseases and potential treatments.

Main Results:

• Commonly mutated genes (DNMT3A, TET2, ASXL1) drive CH.
• Distinctions between myeloid and lymphoid CH impact disease progression.
• Inflammation plays a complex role in CH and its complications.

Conclusions:

• CH is a systemic condition with broad health implications.
• Understanding CH dynamics, including clonal expansion rates, is crucial.
• Targeting inflammation offers potential therapeutic avenues for CH-associated conditions.