Musculoskeletal Aging in Hereditary Disorders of Connective Tissue

在结缔组织疾病队列中（大约 800 名受试者参加了方案 2003-086），脊柱退行性椎间盘疾病、骨密度下降、骨关节炎、慢性疼痛和肌肉骨骼损伤等并发症的出现年龄比普通人群要年轻得多。识别这些异常的诊断研究包括骨密度测定 (DEXA)、脊柱 MRI、疼痛和生活质量问卷以及研究访视期间的肌肉骨骼残疾评估。我们还发现该人群中获得性结缔组织疾病（例如类风湿性关节炎和系统性狼疮）的发病率有所增加。这些发现被认为与细胞外基质结构蛋白的异常组织和异常形成的基质的免疫原性增加有关。确定由于异常细胞外信号而发生的继发性细胞内紊乱可能会导致这些疾病的治疗策略，并有利于患有类似疾病的老龄化人群。

In the connective tissue disorders cohort (approximately 800 subject enrolled in protocol 2003-086), complications such as degenerative disc disease in the spine, bone density loss, osteoarthritis, chronic pain and musculoskeletal impairment appear at a much younger age than found in the general population. The diagnostic studies to identify these abnormalities include bone densitometry (DEXA), MRI of the spine, questionnaires on pain and quality of life, and assessment of musculoskeletal disability during the study visits. We have also found an increased incidence of acquired connective tissue disorders such as rheumatoid arthritis and systemic lupus in this population. These findings are thought to be related to abnormal organization of extracellular matrix structural proteins and increased immunogenicity of the abnormally formed matrix. Determination of the secondary intracellular derangements that occur due to abnormal extracellular signals may lead to treatment strategies in these disorders, as well as benefit the aging population that suffer from similar conditions.