[Anti-inflammatory effect of near-infrared irradiated cell culture media]

Korean J Lab Med. 2009 Aug;29(4):338-44. doi: 10.3343/kjlm.2009.29.4.338.
[Article in Ko]

Abstract

Background: Near-infrared light (NIR, 0.8-1.5 microm light) has been used in therapeutic devices for various injuries such as infected, ischemic and hypoxic wound. NIR-emitting technology has been developed recently in Korea. We hypothesized that NIR may have an anti-inflammatory effect and investigated the effect of NIR-irradiated media on cell culture.

Methods: Three kinds of cell lines, CAPE (vascular endothelial cell), NIH3T3 (fibroblast), and RD (smooth muscle cell) cells were cultured for 4 days in 10% FBS-containing media (1 x 10(4) cells/well), which were irradiated or not irradiated (control) by Eco-NFIR Drive (Model #0210, Ecowavetech, Korea). The cells were stimulated by 10 mcg/mL of bacterial lipopolysaccharide (LPS) or sodium nitroprusside (SNP). Cellular proliferation was measured by methylthiazol tetrazolium assay. Expression of interleukin (IL)-1 beta and nitric oxide was measured by ELISA. Expression of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) was measured by immunofluorescence staining.

Results: NIR-irradiated medium was favorable for CAPE cell proliferation (N=8, P=0.000). IL-1 beta secretion from LPS-stimulated NIH3T3 cells incubated in the NIR medium was below that of control medium (N=4, P=0.026). Nitrate production seemed to be low in NIR-irradiated medium although statistically insignificant (N=4, P=0.076). Expression of iNOS of the LPS-stimulated cells was decreased in NIR medium, however, Cox-2 expression was not different between the two media.

Conclusions: NIR-irradiated medium supported vascular endothelial cell proliferation and showed an anti-inflammatory effect on fibroblast culture. These results can be used as basic data for future research on the clinical application of NIR.

Publication types

  • English Abstract

MeSH terms

  • Animals
  • Anti-Inflammatory Agents / chemistry*
  • Cattle
  • Cell Line
  • Culture Media*
  • Cyclooxygenase 2 / metabolism
  • Humans
  • Infrared Rays*
  • Interleukin-1beta / metabolism
  • Lipopolysaccharides / pharmacology
  • Mice
  • Nitric Oxide / metabolism
  • Nitric Oxide Synthase Type II / metabolism

Substances

  • Anti-Inflammatory Agents
  • Culture Media
  • Interleukin-1beta
  • Lipopolysaccharides
  • Nitric Oxide
  • Nitric Oxide Synthase Type II
  • Cyclooxygenase 2