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Updated: Jul 18, 2026

An In Vitro Model for Studying Cellular Transformation by Kaposi Sarcoma Herpesvirus
09:53

An In Vitro Model for Studying Cellular Transformation by Kaposi Sarcoma Herpesvirus

Published on: August 25, 2017

Matrix metalloproteinases in the progression and regression of Kaposi's sarcoma

Liron Pantanowitz1, Bruce J Dezube, Sonia Hernandez-Barrantes

  • 1Department of Pathology, Baystate Medical Center, Tufts University School of Medicine, Springfield, MA 01199, USA. lpantanowitz@hotmail.com

Journal of Cutaneous Pathology
|December 21, 2006
PubMed
Abstract

Insights

Matrix metalloproteinases (MMPs) are expressed in Kaposi's sarcoma (KS) lesions. MMPs remain expressed in regressed KS lesions, with increased presence in the extracellular matrix and macrophages.

Area of Science:

  • Oncology
  • Dermatology
  • Immunology

Background:

  • Matrix metalloproteinases (MMPs) are implicated in Kaposi's sarcoma (KS) development.
  • Previous research has focused on a limited number of MMPs in KS lesions.
  • The role of MMPs in KS regression remains largely unexplored.

Purpose of the Study:

  • To investigate the expression of multiple MMPs in both developing and regressed KS lesions.
  • To determine the specific MMPs involved in the progression and regression of Kaposi's sarcoma.

Main Methods:

  • Analysis of nine KS lesion samples (AIDS-related and classic cutaneous) at various histological stages.
  • Procurement of regressing KS lesions from patients undergoing chemotherapy.
  • Immunohistochemical staining using monoclonal antibodies against MMP-1, MMP-2, MMP-3, MMP-7, MMP-9, MMP-13, and MMP-14.

Main Results:

  • KS lesional cells expressed all studied MMPs except MMP-14.
  • Inflammatory cells within lesions showed reactivity for MMP-1, MMP-2, MMP-7, MMP-9, and MMP-13.
  • Regressed lesions retained the MMP expression profile in residual KS cells, with increased MMPs in the extracellular matrix and macrophages.

Conclusions:

  • Developing KS cells express collagenases, gelatinases, stromelysin-1, and matrilysin, but not membrane-type MMP-14.
  • This MMP expression pattern persists in residual KS cells post-treatment.
  • Infiltrating macrophages in regressed KS lesions also contribute to the MMP expression profile.

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