La prise en charge thérapeutique de la tendinite nécessite l'intervention d'un professionnel de la santé, habileté à poser un diagnostic précis, qui pourra juger de manière réaliste de ce qui vous convient le mieux.
Laser doux : How laser light helps cells repair themselves CAN gentle doses of laser light help cells to heal?
Posté par drdesforges le 24-06-2008 (2369 lectures)

How laser light helps cells repair themselves CAN gentle doses of laser light help cells to heal?"

THE NEW SCIENTIST, October 11-15, 2003

How laser light helps cells repair themselves CAN gentle doses of laser light help cells to heal? The technique is sometimes used to treat problems such as tinnitus and joint pain, but with no explanation for how these therapies work, there is scepticism over whether the effect is real. Now a physicist has come up with evidence that the physical forces generated by low-energy laser beams may switch on cells' repair mechanisms.

This will support the growing body of evidence that laser therapy is beneficial. At the Joint International Laser Conference in Edinburgh, UK, last month, researchers reported promising results for fields as diverse as IVF and spinal injury. For example, rats with damaged spinal cords made a better recovery if their wound was illuminated with near-infrared laser light, reported Kimberly Byrnes of the Uniformed Services University of Health Sciences in Bethesda, Maryland.

Her team found that in light- treated rats, levels of interleukin-6, which is involved in inflammation, were only 1 per cent of the levels in a control group of rats. But Byrnes does not know how to explain the result. .'There are a million different theories," she says.
One popular idea is that molecules within cells absorb the light, and the extra energy drives chemical reactions. Although this may be part of the answer, it does not explain why some studies have shown effects that are specific to laser light.

Anatoly Rubinov of the Stepanov Institute of Physics in Minsk, Belarus, is convinced that the unique properties of lasers offer an explanation. Unlike ordinary light, laser light is strongly ordered: its electromagnetic waves oscillate in step, with the peaks and troughs aligned. When a laser beam passes through a layer of cells, it splits into many components, which interfere with each other as they bounce about, creating a mottled pattern of light and dark regions.

To show the physical effect this might have on cells, Rubinov illuminated some cell-sized plastic beads with various interference patterns (Journal of Physics D: Applied Physics, vol 36, p 2317). The beads were moved around by the light, and became trapped in the bright regions. Rubinov says cells should be affected in the same way. It is well known that light can exert significant forces on small objects, but the effect of these forces in laser therapy has not been considered before.

Rubinov believes it is these forces that trigger a biological effect within the cells. When he exposed human white blood cells to uniform laser radiation, the number of cells that underwent apoptosis -a form of programmed death that eliminates mutated cells -increased with exposure time. When he used an interference pattern of the same laser light, the number of cells undergoing apoptosis also rose for a few minutes, but then dropped off sharply.

Rubinov concludes that while radiation itself can damage DNA, the forces exerted by the interference pattern trigger a repair mechanism within the cells. In another set of experiments, he showed that cells exposed to certain interference patterns showed fewer signs of DNA damage than those exposed to uniform radiation. "The gradient forces activate the repair system of the cell and increase the resistance of its genome to external factors and increase the resistance of its genome to external factors," he says.

Harry Mosely, president of the British Medical Laser Association, says Rubinov's work represents an important first step towards understanding the potential medical effects of lasers. "It is moving us on in our thinking, which is excellent," he says.
Jenny Hogan .

Tags: Laser-doux  

Autres articles
08-03-2010 - Location de laser
26-06-2008 - Est-ce vraiment un syndrome du canal carpien? Compression proximale du nerf médian
26-06-2008 - Treatment of carpal tunnel syndrome by low-level laser versus open carpal tunnel release
26-06-2008 - Photobiomodulation of pain in carpal tunnel syndrome: review of seven laser therapy studies
26-06-2008 - Effect of low level laser therapy in rheumatoid arthritis patients with carpal tunnel syndrome
26-06-2008 - Carpal tunnel syndrome pain treated with low-level laser and microamperes transcutaneous electric nerve stimulation: a controlled study
25-06-2008 - The Effect of Infra-red Diode Laser Irradiation on the Duration and Severity of Postoperative Pain: a Double Blind Trial
25-06-2008 - A systematic review of low level laser therapy with location-specific doses for pain from chronic joint disorders
25-06-2008 - Low level laser therapy for tendinopathy. Evidence of a dose-response pattern
25-06-2008 - The effect of 300 mW, 830 nm laser on chronic neck pain: a double-blind, randomized, placebo-controlled study
25-06-2008 - Retrospective study of adjunctive diode laser therapy for pain attenuation in 662 patients
25-06-2008 - LLLT using a diode laser in successful treatment of a herniated lumbar/sacral disc
25-06-2008 - Improvement of pain and disability in elderly patients with degenerative osteoarthritis of the knee treated with narrow-band light therapy
25-06-2008 - Healed by the Light
25-06-2008 - A systematic review with procedural assessments and meta-analysis of Low Level Laser Therapy in lateral elbow tendinopathy (tennis elbow).
25-06-2008 - The use of laser therapy and additional therapeutic modalities after arthroscopy of the knee at alpine ski team
25-06-2008 - Asagai reports on the use of GaAlAs (100 mW) laser treatment in a group of 1000 patients with cerebral palsy.
25-06-2008 - Low level laser therapy can be effective for tendinitis: a meta-analysis.
25-06-2008 - Laser's effect on bone and cartilage change induced by joint immobilization: an experiment with animal model
25-06-2008 - LLLT is as well documented as NSAIDs and steroid injections for shoulder tendinitis/bursitis and epicondylaglia.
25-06-2008 - A comparative study of the effects of low laser radiation on mast cells in inflammatory fibrous hyperplasia colored or not colored by the toluidine blue.
25-06-2008 - Soft tissue injuries upon sport activities and traffic accidents - treatment with low-level laser therapy : a multicenter, double- blind, placebo-controlled clinical study on 132 patients
25-06-2008 - Biostimulation of human chondrocytes with Ga-Al-As diode laser: 'in vitro' research
25-06-2008 - What is optimal dose, power density and timing for low level laser therapy in tendon injuries? A review of in vitro and in vivo trials
25-06-2008 - Low-energy laser irradiation promotes the survival and cell cycle entry of skeletal muscle satellite cells.
25-06-2008 - The Japanese Experience in Sumo Wrestling
25-06-2008 - Laser and Sports Medicine in Plastic and Reconstructive Surgery.
25-06-2008 - Advances in laser therapy for bone repair
25-06-2008 - Low level laser therapy for tendinopathy. Evidence of a dose-response pattern
25-06-2008 - Clinical evaluation of the low intensity laser antialgic action of GaAIAs (wavelength=785 nm) in the treatment of the temporomandibular disorders

Signets Sociaux


NewsHack by Arxoops © 2009 &  Mapa gatero
|  Taille du texte: A A |  Connexion |  Créer un compte ? |  Glossaire |  Nouvelles |  Nos Cliniques |  Contactez-nous |  Plan du Site | 

Lachenaie (Terrebonne): (450) 704-2436   Laval: (450) 934-7430  
Saint-Jean-sur-Richelieu: (450) 348-4477