AdiStem Ltd. has been researching the effect of different monochromatic light intensities and frequencies in the colored spectrum on various human and animal cell populations such as mesenchyme stem cells and white blood cells.
Low-level light photoactivation or photomodulation can be utilized for significant benefit in the stimulation of proliferation, differentiation, and inhibition/induction release of growth factors/cytokines of cells from any living organism.
The wavelength or bandwidth of wavelengths is one of the critical factors in selective photomodulation. Pulsed or continuous exposure, duration and frequency of pulses (and dark ‘off’ period) and energy are also factors as well as the presence, absence or deficiency of any or all cofactors, enzymes, catalysts, or other building blocks of the process being photomodulated.
Different parameters with the same wavelength may have very diverse and even opposite effects. When different parameters of photomodulation are performed simultaneously, different effects may be produced. When different parameters are used serially or sequentially, the effects are also different.
The selection of wavelength photomodulation is critical as is the bandwidth selected as there may be a very narrow bandwidth for some applications — in essence these are biologically active spectral intervals. Generally the photomodulation will target flavins, cytochromes, iron-sulfur complexes, quinines, heme, enzymes, and other transition metal ligand bond structures though not limited to these.