Ultraweak photon emission in assessing bone growth factor efficiency using fibroblastic differentiation

J Photochem Photobiol B. 2001 Nov 1;64(1):62-8. doi: 10.1016/s1011-1344(01)00193-2.


Photons participate in many atomic and molecular interactions and changes. Recent biophysical research has shown the induction of ultraweak photons in biological tissue. It is now established that plants, animal and human cells emit a very weak radiation which can be readily detected with an appropriate photomultiplier system. Although the emission is extremely low in mammalian cells, it can be efficiently induced by ultraviolet light. In our studies, we used the differentiation system of human skin fibroblasts from a patient with Xeroderma Pigmentosum of complementation group A in order to test the growth stimulation efficiency of various bone growth factors at concentrations as low as 5 ng/ml of cell culture medium. In additional experiments, the cells were irradiated with a moderate fluence of ultraviolet A. The different batches of growth factors showed various proliferation of skin fibroblasts in culture which could be correlated with the ultraweak photon emission. The growth factors reduced the acceleration of the fibroblast differentiation induced by mitomycin C by a factor of 10-30%. In view that fibroblasts play an essential role in skin aging and wound healing, the fibroblast differentiation system is a very useful tool in order to elucidate the efficacy of growth factors.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Cell Differentiation / drug effects*
  • Cell Differentiation / radiation effects
  • Cell Division / drug effects
  • Cell Division / radiation effects
  • Cells, Cultured
  • Female
  • Fibroblasts / cytology*
  • Fibroblasts / radiation effects
  • Growth Substances / pharmacology*
  • Humans
  • Insulin-Like Growth Factor II
  • Mitosis / drug effects
  • Mitosis / radiation effects
  • Photons*
  • Protein Isoforms / pharmacology
  • Proteins / pharmacology*
  • Ultraviolet Rays
  • Xeroderma Pigmentosum / genetics
  • Xeroderma Pigmentosum / pathology


  • Growth Substances
  • IGF2 protein, human
  • Protein Isoforms
  • Proteins
  • Insulin-Like Growth Factor II