The Aging Microenvironment Shapes Angiogenic Remodeling in IBD-Associated Colorectal Carcinogenesis.

Area of Science:

• Gastroenterology
• Oncology
• Cellular Biology

Background:

• Chronic intestinal inflammation creates a pro-senescent microenvironment.
• Cellular senescence, initially tumor-suppressive, promotes disease via the senescence-associated secretory phenotype (SASP) when accumulated.
• The SASP drives angiogenesis and tissue remodeling, fostering inflammation and genomic instability.

Purpose of the Study:

• To review the link between inflammation-induced senescence, vascular dysfunction, and the progression from IBD to colitis-associated colorectal cancer.
• To discuss therapeutic strategies targeting the senescence-angiogenesis axis for cancer prevention.

Main Methods:

• Literature review synthesizing current evidence.
• Analysis of cellular senescence mechanisms and the SASP in IBD and colorectal cancer.
• Exploration of the senescence-angiogenesis axis.

Main Results:

• Persistent senescent cells and SASP mediators (VEGF, IL-8/CXCL8, MMPs) promote aberrant neovascularization, vascular leakiness, and hypoxia.
• Senescent cell heterogeneity within the inflamed mucosa suggests distinct roles in angiogenesis and malignant transformation.
• Inflammation-induced senescence contributes to the transition from IBD to colitis-associated colorectal cancer.

Conclusions:

• The aging microenvironment reshaped by inflammation significantly impacts intestinal angiogenesis.
• Targeting the senescence-angiogenesis axis presents a promising avenue for early intervention and cancer prevention in colitis-associated neoplasia.
• Understanding senescent cell subsets is crucial for developing effective therapeutic strategies.