Expression of matrix metalloproteinases and inhibitor by human retinal pigment epithelium

J. P. Alexander, J. M B Bradley, J. D. Gabourel, Ted Acott

Research output: Contribution to journalArticle

114 Citations (Scopus)

Abstract

Extracellular matrix turnover is initiated, at least in part, by the regulated secretion of members of a family of matrix metalloproteinases. The authors show that interstitial collagenase, stromelysin, two gelatinases (the 72-kD and 92-kD type IV collagenases), and the tissue inhibitor of metalloproteinases (TIMP) are secreted into the culture medium of human retinal pigment epithelium (RPE). These enzymes and their inhibitor were identified by probing immunoblots of western transfers with specific polyclonal antibodies that were made against these proteins or against peptides containing unique sequences from these proteins. Stromelysin and the gelatinases are also active against substrates that are polymerized into polyacrylamide gels before electrophoresis and require metal ions (probably zinc and/or calcium) for activity. The phorbol mitogen, 12-tetradecanoylphorbol-13-acetate, differentially increases the levels of these metalloproteinases and TIMP found in retinal pigment epithelium culture medium with stromelysin and the 92-kD type IV collagenase responding most strongly and TIMP actually decreasing in certain cases. Additional changes in metalloproteinase profiles are observed after approximately 20 passage of several RPE lines in culture. Modulation of extracellular matrix turnover by changing RPE secretion of these matrix metalloproteinases and their TIMP, may play a central role in the normal function and in the pathology of the retina.

Original languageEnglish (US)
Pages (from-to)2520-2528
Number of pages9
JournalInvestigative Ophthalmology and Visual Science
Volume31
Issue number12
StatePublished - 1990

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Tissue Inhibitor of Metalloproteinases
Matrix Metalloproteinase Inhibitors
Retinal Pigment Epithelium
Matrix Metalloproteinase 3
Gelatinases
Metalloproteases
Matrix Metalloproteinases
Extracellular Matrix
Culture Media
Matrix Metalloproteinase 1
Enzyme Inhibitors
Tetradecanoylphorbol Acetate
Collagenases
Mitogens
Retina
Zinc
Polyacrylamide Gel Electrophoresis
Proteins
Western Blotting
Metals

Keywords

  • collagenase
  • epithelium
  • extracellular matrix turnover
  • gelatinase
  • matrix metalloproteinase
  • retinal pigment
  • stromelysin
  • TIMP

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Expression of matrix metalloproteinases and inhibitor by human retinal pigment epithelium. / Alexander, J. P.; Bradley, J. M B; Gabourel, J. D.; Acott, Ted.

In: Investigative Ophthalmology and Visual Science, Vol. 31, No. 12, 1990, p. 2520-2528.

Research output: Contribution to journalArticle

Alexander, J. P. ; Bradley, J. M B ; Gabourel, J. D. ; Acott, Ted. / Expression of matrix metalloproteinases and inhibitor by human retinal pigment epithelium. In: Investigative Ophthalmology and Visual Science. 1990 ; Vol. 31, No. 12. pp. 2520-2528.
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