Laser Treatment Modality for Strengthening Osteoarthritic Cartilage

强化骨关节炎软骨的激光治疗方式

基本信息

批准号：
10616042
负责人：
GERARD A. ATESHIAN
金额：
$ 8.41万
依托单位：
COLUMBIA UNIV NEW YORK MORNINGSIDE
依托单位国家：
美国
项目类别：
财政年份：
2019
资助国家：
美国
起止时间：
2019-01-10 至 2023-12-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10616042
关键词：
Ablation Activities of Daily Living Age American Animals Back Biological Biomechanics Biomedical Engineering Bovine Cartilage Cartilage Cartilage Diseases Cattle Cell Survival Chemical Agents Chondrocytes Clinical Collagen Data Debridement Defect Degenerative Disorder Degenerative polyarthritis Development Disease Disease Progression Effectiveness Ensure Exhibits Extracellular Matrix Female Fiber Optics Friction Future Health Hip Osteoarthritis Homeostasis Hour Human Hydration status Implant In Situ In Vitro Individual Joints Knee Osteoarthritis Lasers Longevity Mainstreaming Methodology Modality Modification Modulus Morphology National Institute of Arthritis and Musculoskeletal and Skin Diseases Nude Mice Operative Surgical Procedures Optics Organ Pain Pathologic Patient-Focused Outcomes Plasma Property Proteins Protocols documentation Reactive Oxygen Species Replacement Arthroplasty Research Research Project Grants Resistance Safety Shock Side Surface Synovial Fluid System Technology Testing Thermal Ablation Therapy Thick Tissue Viability Tissues Translating Visual Water Weight-Bearing state Work articular cartilage base bone clinically relevant crosslink density design effectiveness evaluation human male improved in vivo ionization irradiation joint function male mechanical properties novel pre-clinical programs repaired response safety assessment subchondral bone tool

项目摘要

Project Summary Osteoarthritis (OA) is a debilitating degenerative disease that afflicts an estimated 27 million Americans age 25 and older. This disease leads to the progressive degradation of the articular layers of diarthrodial joints, significantly compromising the main function of cartilage as a load bearing material, leading to pain and limiting activities of daily living. To this day, there are very limited treatment options for slowing down the progression of OA in its early stages. Most therapies, such as highly invasive partial and total joint replacement surgeries are performed at the late stage of the disease. Introducing treatment options to earlier stages of OA presents the potential to retard or slow down disease progression and thus significantly improve patient outcomes. The primary function of articular cartilage is to transmit loads across the joint surfaces while simultaneously minimizing friction and wear. This application describes the development of an ultrafast laser-based treatment tool which has the ability to induce crosslinks into the cartilage collagen network without the addition of a chemical agent, while simultaneously avoiding damaging effects of optical breakdown and ablation. Preliminary data show that laser-induced crosslinks increase compressive stiffness and wear resistance, without compromising cell viability, which may be expected to slow down progression of OA. The overall aim of this application is to develop a range of effective and safe laser operating parameters that enhance cartilage mechanical properties and wear resistance, enabling us to produce a clinically relevant protocol. We also aim to assess the influence of laser-induced short-lived bursts of reactive oxygen species onto the long-term response of cartilage during in vitro and in vivo culture. To translate this technology to future animal and human studies, we will develop and test a laser-based clinical tool for arthroscopic treatment of cartilage in situ. In specific aim 1, we will optimize a framework for structural, morphological and functional modification of the cartilage extracellular matrix subject to femtosecond laser irradiation, using devitalized bovine and human OA cartilage explants. In specific aim 2, we will narrow this range of operating parameters by testing short-term and long-term viability of laser-treated live bovine and human OA (male & female) cartilage explants against untreated controls, using in vitro culture up to 4 weeks. In specific aim 3, we will verify that laser-treated live human OA cartilage explants exhibit comparable viability and health as untreated controls when implanted for up to 8 weeks in the back of nude mice. We will also fabricate a fiber optic-based laser system and validate its effectiveness in simulated in situ arthroscopic applications in OA knee joints. Upon completion of these studies, we will have established effective and safe operating parameters for this novel laser treatment modality, and created a practical tool to test this methodology in situ, first in large animals, then in humans.

项目摘要骨关节炎（OA）是一种使人衰弱的退化性疾病，估计有2700万美国人25岁又年龄较大。这种疾病导致腹膜关节关节层的逐渐降解，显着损害软骨作为负载轴承材料的主要功能，导致疼痛和限制日常生活的活动。直到今天，有非常有限的治疗选择来减慢进展 OA的早期阶段。大多数疗法，例如高度侵入性的部分和全部关节置换手术在疾病的后期进行。将治疗方案介绍给OA礼物的早期阶段延迟或减慢疾病进展，从而显着改善患者预后的潜力。这关节软骨的主要功能是在关节表面上传输载荷，同时又最小化摩擦和磨损。该应用描述了基于超快激光治疗的发展具有诱导交联的工具，而无需添加一个软骨胶原网络化学剂，同时避免了光学分解和消融的破坏效应。初步的数据表明，激光诱导的交联会增加压缩刚度和耐磨性，而无需损害细胞活力，预计可以减缓OA的降低。总体目的应用是开发一系列有效且安全的激光工作参数，以增强软骨机械性能和耐磨性，使我们能够产生与临床相关的方案。我们也瞄准评估激光引起的活性氧的短寿命爆发对长期的影响软骨在体外和体内培养过程中的反应。将这项技术转化为未来的动物和人类研究，我们将开发和测试基于激光的临床工具，用于关节镜治疗软骨中的软骨原位。在特定目标1中，我们将优化一个结构，形态和功能修改的框架使用不稳定的牛和人类的软骨外基质受到飞秒激光照射 OA软骨外植体。在特定目标2中，我们将通过测试短期来缩小此范围的操作参数激光治疗的活牛和人OA（男性和女性）软骨的长期生存能力反对未经处理的对照，使用长达4周的体外培养。在特定目标3中，我们将验证激光处理的现场植入时，人OA软骨外植体表现出可比的生存能力和健康作为未处理的对照在裸鼠的后部长达8周。我们还将制造基于光纤的激光系统并验证其 OA膝关节中的原位关节镜应用模拟中的有效性。这些完成后研究，我们将为这种新型激光治疗建立有效且安全的操作参数模式，并创建了一种实用的工具来原位测试这种方法，首先是在大型动物中，然后是人类。