Retinal pigment epithelial cells secrete substances that are chemotactic for monocytes

James (Jim) Rosenbaum, Leslie O'rourke, Gordon Davies, Charlotte Wenger, Larry David, Joseph Robertson

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Monocyte/macrophages play a prominent role in several forms of retinal pathology including proliferative vitreoretinopathy, senile macular degeneration, and retinal wound healing. In each of these entities, the retinal pigment epithelium (RPE) is characteristically involved as well. Since RPE cells are known to secrete chemoattractants for astrocytes, we considered the possibility that they might secrete chemotactic factors for monocytes in addition. We have found in in vitro assays that a 5% concentration of medium from 6 different well-established RPE culture lines each consistently induced monocyte migration greater than that elicited by either buffer or unconditioned medium. "Checkerboard" analysis indicated that RPE culture supernatants induced optimal migration with a stimulus gradient (chemotaxis as opposed to chemokinesis alone). Chemotactic activity could be detected in eluates from ion exchange high performance liquid chromatography or gel filtration columns. Several peaks of activity suggested that more than one factor may be responsible for the ability to induce cell migration. The chemotactic activity was largely heat stable. The chemotactic factor induced only minimal migration of polymorphonuclear leukocytes. The secretion of chemotactic factors for monocytes could contribute significantly to the pathogenesis of several retinal diseases.

Original languageEnglish (US)
Pages (from-to)793-800
Number of pages8
JournalCurrent Eye Research
Volume6
Issue number6
DOIs
StatePublished - 1987

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Retinal Pigments
Retinal Pigment Epithelium
Chemotactic Factors
Monocytes
Epithelial Cells
Proliferative Vitreoretinopathy
Retinal Diseases
Aptitude
Ion Exchange
Chemotaxis
Astrocytes
Wound Healing
Cell Movement
Gel Chromatography
Buffers
Neutrophils
Hot Temperature
Macrophages
High Pressure Liquid Chromatography
Pathology

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Retinal pigment epithelial cells secrete substances that are chemotactic for monocytes. / Rosenbaum, James (Jim); O'rourke, Leslie; Davies, Gordon; Wenger, Charlotte; David, Larry; Robertson, Joseph.

In: Current Eye Research, Vol. 6, No. 6, 1987, p. 793-800.

Research output: Contribution to journalArticle

Rosenbaum, James (Jim) ; O'rourke, Leslie ; Davies, Gordon ; Wenger, Charlotte ; David, Larry ; Robertson, Joseph. / Retinal pigment epithelial cells secrete substances that are chemotactic for monocytes. In: Current Eye Research. 1987 ; Vol. 6, No. 6. pp. 793-800.
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