Transgelin Expression in Activated Cancer-Associated Fibroblasts Regulates Stromal Contractility and Promotes Colon...

Area of Science:

• Oncology
• Cancer Biology
• Cellular and Molecular Medicine

Background:

• Transgelin is an actin-binding protein implicated in cancer progression.
• Its specific role and distribution in colon cancer, particularly within cancer-associated fibroblasts (CAFs), remain largely undefined.
• Understanding transgelin's function in the tumor microenvironment is crucial for identifying new therapeutic strategies.

Purpose of the Study:

• To elucidate the mechanistic role of transgelin in colon cancer progression.
• To investigate the functional impact of transgelin within cancer-associated fibroblasts.
• To determine the clinical significance of stromal transgelin expression as a prognostic marker.

Main Methods:

• Analysis of transgelin expression in 359 human colon cancer tissue microarrays.
• In vitro knockdown (KD) experiments in human colon fibroblasts stimulated with cancer cell-conditioned medium.
• In vivo co-transplantation models using cancer cells and transgelin-knockdown fibroblasts in immunodeficient mice.

Main Results:

• Transgelin expression was predominantly observed in activated CAFs within colon cancer tissues.
• Transgelin KD in fibroblasts suppressed collagen gel contractility and inhibited tumor growth in vivo.
• Stromal transgelin expression significantly correlated with distant metastasis and overall patient survival.

Conclusions:

• Stromal transgelin plays a key role in promoting colon cancer progression by modulating the tumor microenvironment, specifically through stromal contractility.
• Transgelin expression in CAFs serves as a significant prognostic factor for colon cancer.
• Targeting transgelin in CAFs presents a potential therapeutic avenue for colon cancer treatment.