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Updated: Aug 24, 2025

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells
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Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells

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The role of CCL2, CCL7, ICAM-1, and VCAM-1 in interaction of endothelial cells and natural killer cells

Hye Won Jun1, Hong Kyung Lee1, Ik Ho Na1

  • 1College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 28160, Republic of Korea.

International Immunopharmacology
|October 24, 2022
PubMed

Insights

Targeting endothelial cell interactions can improve natural killer (NK) cell infiltration into solid tumors. Enhancing NK cell homing involves targeting CCL2, CCL7, ICAM-1, and VCAM-1 for better cancer therapy.

Area of Science:

  • Immunology
  • Cancer Biology
  • Cellular Interactions

Background:

  • Natural killer (NK) cell therapy shows promise for cancer treatment.
  • Poor NK cell infiltration into solid tumors limits therapeutic efficacy.
  • Understanding NK cell-endothelial cell interactions is crucial for improving tumor homing.

Purpose of the Study:

  • To investigate the mechanisms underlying NK cell homing to solid tumors.
  • To identify key molecular players in NK cell-endothelial cell interactions.
  • To explore potential therapeutic targets for enhancing NK cell infiltration.

Main Methods:

  • Analysis of endothelial cell activation by tumor-associated macrophages.
  • Assessment of NK cell migration using transwell and imaging assays.
  • Evaluation of endothelial cell adhesion molecule expression (ICAM-1, VCAM-1) and functional impact via siRNA.

Main Results:

  • Tumor-associated CD11b+ cells, including macrophages, activate endothelial cells via TNF-α and IL-1β.
  • Activated endothelial cells enhance NK cell migration by producing CCL2 and CCL7.
  • TNF-α increases endothelial ICAM-1 and VCAM-1 expression, promoting NK cell adhesion.
  • siRNA-mediated knockdown of ICAM-1 or VCAM-1 reduces NK cell-endothelial cell contact.

Conclusions:

  • Endothelial cells play a critical role in facilitating NK cell homing to tumors.
  • CCL2, CCL7, ICAM-1, and VCAM-1 are key mediators of NK cell-endothelial cell interaction.
  • Targeting these molecules offers a strategy to improve NK cell infiltration for cancer immunotherapy.
Keywords:
Adhesion moleculeCell–cell interactionChemokineEndothelial cellNK cell

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