MR Biomarkers of Inflammation in Knee Osteoarthritis

膝骨关节炎炎症的 MR 生物标志物

• 批准号: 10476943
• 负责人: CHRISTINE B CHUNG
• 金额: --
• 依托单位: VA SAN DIEGO HEALTHCARE SYSTEM
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-10-01 至 2026-09-30
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10476943
• 关键词: 15q; Acute; Address; Affect; Animal Model; Biochemical; Biological Markers; Blood Vessels; Bone Marrow; Cadaver; Caring; Cartilage; Cells; Cellularity; Clinical; Cumulative Trauma Disorders; Data; Degenerative polyarthritis; Detection; Diffusion; Disease; Elements; Evaluation; Exhibits; Fatty Acids; Fatty acid glycerol esters; Fibrosis; Funding; Goals; Histologic; Hyperplasia; Image; Infiltration; Inflammaging; Inflammation; Inflammatory; Institution; Intervention; Intravenous; Joints; Knee; Knee Osteoarthritis; Length; Literature; Magnetic Resonance Imaging; Magnetic Resonance Spectroscopy; Maps; Marrow; Measures; Mediating; Meniscus structure of joint; Morphology; Multivariate Analysis; Mus; Natural Immunity; Outcome; Pain; Pathway interactions; Patients; Peripheral Vascular Diseases; Process; Property; Protocols documentation; Protons; Quantitative Evaluations; Resolution; Restriction Spectrum Imaging; Risk; Role; Saturated Fatty Acids; Scanning; Standardization; Statistical Models; Synovial Fluid; Synovial Membrane; Synovitis; Techniques; Time; Tissue Donors; Tissues; Translating; Traumatic Arthropathy; Veterans; Visit; Water; Work; bone; chromosome 5q loss; chronic musculoskeletal pain; clinical translation; cohort; density; diffusion weighted; economic impact; effusion; follow-up; functional improvement; joint inflammation; joint injury; knee replacement arthroplasty; loss of function; magnetic resonance imaging biomarker; military service; mouse model; novel; osteoarthritis pain; pain relief; patient population; pre-clinical; prescription opioid; programs; repaired; response; service member; socioeconomics; subchondral bone; treatment response

Osteoarthritis (OA) is highly prevalent in U.S. military service members and Veterans due to the impact of joint trauma and overuse injury. Its socioeconomic impact is substantial, estimated to approach $60 billion per year, and no disease-modifying treatments exist. Collaborative programs (such as CaRe-AP) have been proposed to develop a treatment for post-traumatic osteoarthritis (PTOA) that will relieve pain and improve function. The hypothesis that PTOA is caused by maladaptive repair responses including activation of the pro-inflammatory pathways of innate immunity that in turn result in pain, loss of function and structural decline have been broadly accepted. To this end, OA has long been characterized as a ‘wear and tear’ disease but is now considered a cell-mediated condition involving low-grade innate inflammation affecting all tissues of the joint (cartilage, bone, synovium, fat pads). Inflammatory processes increase the risk of knee OA (kOA) onset and progression, though the role of inflammation in the kOA, and as a determinant in successful treatments is unclear. Further, correlation of structural changes that result in progression of degeneration in kOA with those that serve as pain generators in this disease is crucial. Opioid prescriptions due to acute and chronic musculoskeletal pain visits increased by 50% between 2006 and 2010. MRI of kOA has historically focused on tissue specific drivers of OA, most notably cartilage evaluation. Our past work has pioneered a whole-joint approach to kOA, taking into consideration interactions between cartilage, meniscus and subchondral bone. The current MRI literature on the synovium, synovial fluid, infrapatellar fat pad (IFP) and bone marrow are limited, presenting a significant gap in MRI evaluation of kOA. The overwhelming majority of MRI literature addressing synovitis/effusion involves intravenous contrast-based protocols. In a patient population prone to peripheral vascular disease (affecting contrast delivery) and requiring longitudinal follow-up, contrast administration is suboptimal. Given the histologic elements of the inflammatory pathway in synovium, IFP and bone marrow, non-invasive identification and characterization of cellular infiltrates as well as their distinction from synovial hyperplasia, fibrosis and vascularity in tissues would represent a revolutionary step in understanding the role of inflammation in OA progression and response to therapy. Restriction Spectrum Imaging (RSI) is a novel diffusion-weighted technique that has been used to distinguish restricted diffusion within cells from other water compartments, has higher resolution than standard diffusion sequences, and has the potential to be standardized across institutions. Ultrashort Echo Time Dual Echo Steady State (UTE-DESS) combines UTE and DESS to characterize tissues with a range of intrinsic MR properties and allows quantitative evaluation of those properties (T1 and T2) as well as diffusion data. We hypothesize that these techniques can be used to identify cellular infiltrates (RSI) and distinguish them from regions of fibrosis and vascularity (UTE-DESS) in synovium, IFP and bone marrow in the setting of kOA. The overall goal of this project is to optimize and validate novel non-invasive (RSI and UTE-DESS) MRI biomarkers of joint inflammation that can identify and characterize inflammatory changes of cellular infiltrates, fibrosis and vascularity in synovium, IFP and bone marrow. We will deploy these MR biomarkers of inflammation in a preclinical animal model (mild, moderate and severe kOA) and translate optimized sequences to assess conservative therapy in kOA subjects. We will develop a multi-variate statistical model that incorporates outcomes from clinical morphologic MRI, novel optimized MR biomarkers of inflammation, MR spectroscopy to create a structural/ biochemical framework to correlate with kOA pain/function.

由于以下因素的影响，骨关节炎 (OA) 在美国现役军人和退伍军人中非常普遍 其社会经济影响是巨大的，估计接近 600 亿美元。 每年，并且不存在任何疾病缓解疗法（例如 CaRe-AP）。 提议开发一种治疗创伤后骨关节炎（PTOA）的方法，以减轻疼痛并改善症状 PTOA 是由适应不良修复反应（包括激活）引起的假设。 先天免疫的促炎症途径，进而导致疼痛、功能和结构丧失 为此，OA 长期以来一直被定性为“磨损”。 疾病，但现在被认为是一种细胞介导的疾病，涉及低度先天影响炎症 关节的所有组织（软骨、骨、滑膜、脂肪垫）都会增加发生炎症的风险。 膝关节骨关节炎 (kOA) 的发病和进展，尽管炎症在 kOA 中的作用，并且是膝关节骨关节炎 (kOA) 的决定因素 此外，导致疾病进展的结构变化的相关性尚不清楚。 kOA 的退化与在这种疾病中充当疼痛产生者的阿片类药物处方至关重要。 2006 年至 2010 年间，因急性和慢性肌肉骨骼疼痛就诊的人数增加了 50%。 kOA 的 MRI 历来侧重于 OA 的组织特异性驱动因素，最值得注意的是软骨评估。 过去的工作开创了 kOA 的整体联合方法，考虑到之间的相互作用 目前关于滑膜、滑液、软骨、半月板和软骨下骨的 MRI 文献。 髌下脂肪垫（IFP）和骨髓有限，在 MRI 评估中存在显着差距 kOA 绝大多数涉及滑膜炎/积液的 MRI 文献涉及静脉注射。 基于造影剂的治疗方案适用于易患周围血管疾病（影响造影剂）的患者群体。 分娩）并需要纵向随访，考虑到组织学，造影剂给药效果欠佳。 滑膜、IFP 和骨髓中炎症途径的要素，非侵入性识别和 细胞浸润的特征及其与滑膜增生、纤维化和滑膜增生的区别 组织中的血管分布将代表着理解炎症在 OA 中的作用的革命性一步 限制性频谱成像 (RSI) 是一种新型弥散加权成像。 该技术已用于区分细胞内的受限扩散与其他水室， 具有比标准扩散序列更高的分辨率，并且有可能在各个领域进行标准化 超短回波时间双回波稳态 (UTE-DESS) 结合了 UTE 和 DESS 表征具有一系列固有 MR 特性的组织，并允许对这些特性进行定量评估 我们发现这些技术可用于。 识别细胞浸润 (RSI) 并将其与纤维化和血管分布区域 (UTE-DESS) 区分开来 kOA 中的滑膜、IFP 和骨髓。 该项目的总体目标是优化和验证新型非侵入性（RSI 和 UTE-DESS）MRI 关节炎症的生物标志物，可以识别和表征细胞浸润的炎症变化， 我们将部署滑膜、IFP 和骨髓中的纤维化和血管分布。 临床前动物模型（轻度、中度和重度 kOA）中的炎症并进行翻译优化 我们将开发一个多变量统计模型来评估 kOA 受试者的保守治疗。 结合了临床形态学 MRI 的结果、新型优化的 MR 炎症生物标志物、 MR 波谱创建与 kOA 疼痛/功能相关的结构/生化框架。