Breakthrough Prognostic Test Identifies High-Risk Esophageal Cancer Patients: Targeting Tumor Stiffness and Drug Resistance

October 28, 2024
Breakthrough Prognostic Test Identifies High-Risk Esophageal Cancer Patients: Targeting Tumor Stiffness and Drug Resistance
  • Esophageal cancer ranks as the seventh leading cause of cancer death globally, with esophageal squamous cell carcinoma (ESCC) accounting for about 85% of new cases.

  • Recent gene expression analysis has led to the development of a prognostic test indicating that patients with elevated levels of desmoplastic cancer-associated fibroblasts (dCAFs) are at a higher risk of cancer mortality under current treatments.

  • CAFs are heterogeneous, originating from various cell types including resting fibroblasts, muscle cells, and stem cells, and they vary in their differentiation status.

  • Researchers have categorized cancer-associated fibroblasts into three types: myofibroblastic (myCAFs), inflammatory (iCAFs), and desmoplastic (dCAFs), with dCAFs being particularly associated with poor patient prognoses.

  • Tumors characterized by high levels of dCAFs tend to be stiffer, richer in collagen, and exhibit increased expression of genes linked to drug resistance.

  • ASCs can transdifferentiate into CAFs under the influence of tumor-derived signals, which enhances their secretion of extracellular matrix components and pro-inflammatory cytokines that promote tumorigenesis.

  • These fibroblasts play a crucial role in remodeling the extracellular matrix (ECM) surrounding tumors, which complicates drug delivery and can diminish the effectiveness of immunotherapies.

  • Potential therapeutic strategies may involve disrupting the interactions between adipose-derived stem cells (ASCs), CAFs, and tumor cells, as well as targeting key signaling pathways and exploring immunotherapy options.

  • Research indicates that epigenetic modifications can impact the functionality of ASCs and CAFs, with ongoing studies focusing on targeting these changes to inhibit their pro-tumorigenic effects.

  • Adipose-derived stem cells (ASCs) are identified by specific surface markers such as CD34, CD90, and CD105, which indicate their mesenchymal stem cell properties and plasticity.

  • Ovarian cancer is notably aggressive, exhibiting high mortality rates and recurrence, and often develops resistance to platinum-based treatments.

  • In co-culture studies, ESCC cells showed increased expression and secretion of amphiregulin (AREG) when interacting with CAFs, along with activation of its receptor, EGFR.

Summary based on 3 sources


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Sources

The Fibroblasts That Protect Ovarian Cancer

Lifespan Extension Advocacy Foundation • Oct 28, 2024

The Fibroblasts That Protect Ovarian Cancer

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