首页> 外文会议>Conference on Laser Tissue Interaction XIII: Photochemical, Photothermal, and Photomechanical, Jan 20-23, 2002, San Jose, California >Stimulation of Chondrocyte Proliferation following Photothermal, Thermal, and Mechanical Injury in ex-vivo Cartilage Grafts
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Stimulation of Chondrocyte Proliferation following Photothermal, Thermal, and Mechanical Injury in ex-vivo Cartilage Grafts

机译:体外软骨移植物光热,热和机械损伤后刺激软骨细胞增殖

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摘要

Laser irradiation may stimulate chondrocytes proliferation in the peripheral region surrounding a photothermally-heated area in rabbit nasal septal cartilage. In this study, ex-vivo rabbit nasal septal cartilages maintained in culture were irradiated with an Nd:YAG laser (λ= 1.32μm, 4-16 sec, 10-45 W/cm~2) to examine the relationship between the diameter of replicating cells and irradiation time. Also, this study investigated whether proliferation occurs following heating (by immersion in hot saline baths, with a heated metal rod, and a soldering iron) and mechanical modification (crushing with a metal stamp and scoring with a scalpel). Replicating chondrocytes were identified using a Bromodeoxyuridine (BrdU) double antibody detection system in whole mount tissue. Light microscopy was used to confirm the presence of BrdU stained chondrocytes. The mechanical and thermal stressors used failed to produce a proliferative response in chondrocytes as previously seen with laser irradiation. We suspect that chondrocyte proliferation may be induced as a response to alteration in matrix structure produced by photothermal, thermal, or mechanical modification of the matrix. Heat generated by a laser to stimulate chondrocyte proliferation may lead to new treatment options for degenerative articular diseases and disorders. Laser technology can be adapted for use with minimally invasive surgical instrumentation to deliver light into otherwise inaccessible regions of the body.
机译:激光照射可能会刺激兔鼻中隔软骨光热加热区域周围的软骨细胞增殖。在这项研究中,用Nd:YAG激光(λ=1.32μm,4-16秒,10-45 W / cm〜2)辐照培养的离体兔鼻中隔软骨,以检查其直径之间的关系。复制细胞和照射时间。此外,这项研究还研究了在加热(通过浸入热盐水中,用加热的金属棒和烙铁)和机械改性(用金属印模压碎并用手术刀划痕)后是否发生增殖。使用溴脱氧尿苷(BrdU)双抗体检测系统在整个组织中鉴定出复制的软骨细胞。用光学显微镜确认BrdU染色的软骨细胞的存在。如先前用激光照射所见,所使用的机械和热应激源未能在软骨细胞中产生增殖反应。我们怀疑软骨细胞增殖可能是由于对基质的光热,热或机械修饰产生的基质结构改变的反应而被诱导的。激光刺激软骨细胞增殖产生的热量可能会导致退行性关节疾病和病症的新治疗选择。激光技术可以适合与微创外科手术器械一起使用,以将光传输到身体其他地方无法接近的区域。

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