Clonal Hematopoiesis in Colorectal Cancer: Mechanisms and Implications

Area of Science:

• Hematology
• Oncology
• Immunology

Background:

• Clonal hematopoiesis (CH) involves mutations in hematopoietic stem cells, previously seen as age-related.
• CH is now recognized for its role in non-hematologic cancers, notably colorectal cancer (CRC).
• The interplay between CH and CRC is complex, influenced by chronic inflammation and metabolic changes in CRC.

Purpose of the Study:

• To review the bidirectional relationship between CH and CRC.
• To explore the mechanistic underpinnings of CH in CRC.
• To discuss implications for CRC progression, treatment resistance, and immune modulation.

Main Methods:

• Literature review synthesizing recent findings on CH and CRC.
• Analysis of CH-driven myeloid cell interactions within the CRC tumor microenvironment.
• Examination of CH's impact on inflammation and antitumor immunity in CRC.

Main Results:

• CH is highly prevalent in CRC patients, with potential drivers including chronic inflammation and metabolic alterations.
• CH-derived myeloid cells can promote CRC progression, inflammation, and immune evasion.
• Mutations like DNMT3A and TET2 in CH are implicated in modulating the CRC tumor microenvironment.

Conclusions:

• The CH-CRC interface presents significant implications for CRC pathogenesis and treatment.
• Understanding CH in CRC may lead to novel strategies for risk stratification and personalized therapy.
• CH influences CRC progression and immune response, highlighting a critical link between hematopoiesis and solid tumors.