Bronchial epithelial cells respond to insulin and insulin-like growth factor-I as a chemoattractant.

S. Shoji, R. F. Ertl, James Linder, S. Koizumi, W. C. Duckworth, S. I. Rennard

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Migration of epithelial cells to cover areas of injury is thought to be important in the repair process following airway insult. Insulin is reported to be a growth factor for bronchial epithelial cells, and growth factors have been known to be chemotactic for many types of cells. Thus, we hypothesized that insulin may be a chemoattractant for bronchial epithelial cells. To evaluate this, we prepared bronchial epithelial cells and measured their chemotactic activity toward insulin. Bronchial epithelial cells were isolated by overnight digestion with bacterial protease, filtered through 100-microns nitex mesh, and then cultured at 1 x 10(6) cells/ml in tissue culture dishes in medium 199 supplemented with transferrin, insulin, epidermal growth factor, hydrocortisone, antibiotics, and 10% FCS for 3 d. The cultured cells were rinsed twice to remove supplements, trypsinized and resuspended at 1 x 10(6) cells/ml in medium 199 without supplements, and used as the cell source for chemotaxis. Chemotactic activity of bronchial epithelial cells was measured by the blindwell chamber technique using 8-microns Nuclepore filter membranes coated with 0.1% gelatin. The cells were added to the top wells in a 48-multiwell chamber with insulin in the bottom wells and incubated for 6 h at 37 degrees C, 5% CO2. Bronchial epithelial cells migrated in response to insulin in a dose-dependent manner up to an optimal dose of insulin, 100 micrograms/ml, and decreased at higher concentrations. The number of migrated cells per 10 high power fields was 33.7 +/- 1.9 at the optimum and 3.7 +/- 0.7 without insulin (P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)

Original languageEnglish (US)
Pages (from-to)553-557
Number of pages5
JournalAmerican journal of respiratory cell and molecular biology
Volume2
Issue number6
DOIs
StatePublished - Jan 1 1990

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Chemotactic Factors
Insulin-Like Growth Factor I
Epithelial Cells
Insulin
Intercellular Signaling Peptides and Proteins
Tissue culture
Chemotaxis
Gelatin
Transferrin
Epidermal Growth Factor
Hydrocortisone
Digestion
Cultured Cells
Repair
Peptide Hydrolases
Cell Count
Cells
Anti-Bacterial Agents
Membranes
Wounds and Injuries

ASJC Scopus subject areas

  • Molecular Biology
  • Pulmonary and Respiratory Medicine
  • Clinical Biochemistry
  • Cell Biology

Cite this

Bronchial epithelial cells respond to insulin and insulin-like growth factor-I as a chemoattractant. / Shoji, S.; Ertl, R. F.; Linder, James; Koizumi, S.; Duckworth, W. C.; Rennard, S. I.

In: American journal of respiratory cell and molecular biology, Vol. 2, No. 6, 01.01.1990, p. 553-557.

Research output: Contribution to journalArticle

Shoji, S. ; Ertl, R. F. ; Linder, James ; Koizumi, S. ; Duckworth, W. C. ; Rennard, S. I. / Bronchial epithelial cells respond to insulin and insulin-like growth factor-I as a chemoattractant. In: American journal of respiratory cell and molecular biology. 1990 ; Vol. 2, No. 6. pp. 553-557.
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