Cited by 261Wound Healing and TreatmentsNitric Oxide and Endothelin EffectsLiver physiology and pathology

Nitric oxide, an autocrine regulator of wound fibroblast synthetic function

Schäffer, M R, Efron, P A, Thornton, F J, Klingel, K, Gross, S S, Barbul, A·1997·The Journal of Immunology

Abstract

Nitric oxide (NO) is synthesized in wounds, but its exact role and cellular source are not known. Wound fibroblasts (WF) are phenotypically characterized by increased collagen synthesis and contractility. We hypothesized that WF may be also phenotypically altered during wound healing to synthesize NO. WF were isolated from polyvinyl alcohol sponges implanted in male Lewis rats and harvested 10 days later. Proliferation in response to 10% fetal bovine serum was assessed by [3H]thymidine incorporation in a microculture system. A fibroblast-populated collagen lattice was used for assaying contractility. Collagen synthesis was determined by measuring the collagenase-sensitive fraction of protein-incorporated [3H]proline. Fibroblasts were incubated in the presence or the absence of 0.5 mM S-methyl-isothio-uronium or 0.5 mM N-monomethyl-L-arginine, both competitive inhibitors of NO synthase. WF spontaneously synthesize and release NO (4.60 +/- 0.29 nmol nitrite/microg DNA/48 h). Normal dermal fibroblasts do not synthesize NO. WF NO synthesis was limited to the first and second passages postharvest and was inhibitable by S-methyl-isothio-uronium (96%) and N-monomethyl-L-arginine (84%). In vivo iNOS expression by WF was confirmed by in situ hybridization and immunohistochemistry. Inhibition of endogenous NO synthesis had no effect on fibroblast proliferation. However, fibroblast-mediated collagen contraction was enhanced (p < 0.01), and collagen synthesis was significantly decreased (p < 0.05) by inhibiting NO synthase. The data show that WF are phenotypically altered during the healing process to synthesize NO, which, in turn, regulates their collagen synthetic and contractile activities.

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Crossref · 10.4049/jimmunol.158.5.2375

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Authors
Schäffer, M. R., Efron, P. A., Thornton, F. J., Klingel, K., Gross, S. S., & Barbul, A.
Affiliations
Johns Hopkins University (US)
Venue
The Journal of Immunology
Published
1997-03-01
Volume
158
Issue
5
Pages
2375-2381
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2113127336
Cited by
260
References
0
Citations by year
2025: 2 · 2024: 6 · 2023: 3 · 2022: 8 · 2021: 5 · 2020: 4 · 2019: 7 · 2018: 10 · 2017: 9 · 2016: 10 · 2015: 5 · 2014: 6 · 2013: 11 · 2012: 9
FWCI
17.48
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
nitric oxide, wound healing, collagen synthesis, collagen contraction, nitric oxide synthase, inducible nitric oxide synthase, L-NMMA, fibroblast proliferation, autocrine regulation
MeSH terms
Animals, Cell Division, Cell Line, Collagen, DNA, Fibroblasts, Male, Nitric Oxide, Phenotype, Rats, Inbred Lew, Wound Healing, In Situ Hybridization, Mice, Rats

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