Clonal dynamics on the road to hematological malignancy (MBL, MGUS, CH)

Area of Science:

• Hematology
• Oncology
• Immunology

Background:

• Monoclonal gammopathy of undetermined significance (MGUS), monoclonal B-cell lymphocytosis (MBL), and clonal hematopoiesis (CH) are prevalent age-associated precursor states.
• High-sensitivity technologies reveal these conditions are more widespread than previously thought, with only a minority progressing to overt malignancies.

Purpose of the Study:

• To explore the unifying paradigm of malignant transformation in MGUS, MBL, and CH.
• To understand the role of dynamic clonal evolution, intrinsic fitness, and microenvironmental pressures in disease progression.
• To highlight shared biological principles for developing "precision prevention" strategies.

Main Methods:

• Review of high-sensitivity technologies: mass spectrometry, multiparametric flow cytometry, and next-generation sequencing.
• Analysis of clonal evolution dynamics in CH, MBL, and MGUS.
• Investigation of aging-associated inflammation and microenvironmental remodeling as common denominators.

Main Results:

• Malignant transformation is governed by dynamic clonal evolution, not just driver lesions.
• Aging-associated inflammation and microenvironmental remodeling favor aberrant clones.
• CH, MBL, and MGUS exhibit distinct yet interconnected progression pathways influenced by specific factors like inflammation, antigenic stimulation, and niche permissiveness.

Conclusions:

• A unifying paradigm of clonal evolution and microenvironmental interaction is emerging across MGUS, MBL, and CH.
• These precursor states share biological principles that can inform risk stratification.
• "Precision prevention" strategies can target high-risk trajectories while reducing unnecessary surveillance in low-risk individuals.