Skeletal muscle biology in rheumatoid arthritis

类风湿性关节炎的骨骼肌生物学

• 批准号: 8775450
• 负责人: Leslie J Crofford
• 金额: $ 39.93万
• 依托单位: VANDERBILT UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-17 至 2015-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8775450
• 关键词: Activities of Daily Living; Address; Adverse effects; Affect; Animal Experiments; Animals; Antimetabolites; Antioxidants; Area; Arthralgia; Biochemical; Biological; Biology; Blood Circulation; Calcium; Chronic; Clinical; Collagen Arthritis; Data; Depressed mood; Disease; Endocrine; Event; Experimental Arthritis; Experimental Models; Exposure to; Folic Acid Antagonists; Functional disorder; Future; Goals; Homeostasis; Human; Hygiene; Individual; Inflammatory; Injury; Interleukins; Intervention; Joints; Limb structure; Link; Mediator of activation protein; Modeling; Mus; Muscle; Muscle Fibers; Muscle Mitochondria; Muscle Weakness; Muscle function; Muscular Atrophy; Neurons; Nitric Oxide; Nitric Oxide Synthase; Nitric Oxide Synthase Type I; Oxidants; Oxidation-Reduction; Oxidative Stress; Patients; Peroxonitrite; Pharmacologic Substance; Pharmacotherapy; Population; Process; Production; Proteins; Quality of life; Reactive Oxygen Species; Research; Rheumatoid Arthritis; Ryanodine; Skeletal Muscle; Source; Sterile coverings; Stimulus; Sulfhydryl Compounds; Symptoms; Testing; Therapeutic; Tissues; Tumor Necrosis Factor-alpha; Walking; arthritis therapy; clinical care; clinically relevant; cytokine; design; drug development; falls; joint stiffness; mouse model; research study; response; standard of care

DESCRIPTION (provided by applicant): Rheumatoid arthritis (RA) is the most common chronic inflammatory disease, affecting up to 1% of the population. Beyond joint pain and stiffness, muscle weakness is among the most prevalent symptoms of RA patients. Weakness affects most major muscle groups and limits basic activities such as walking, sitting and rising from chairs, opening containers, dressing oneself, and personal hygiene. Weakness also contributes to postural instability in RA, predisposing individuals to fall-related injuries, and dramatically lessens the overall quality of life. There is no drug therapy for RA-related weakness, no clinical standard of care to address this debilitating problem. The goal of this project is to define processes that cause weakness in RA and identify biological targets for future drug development. Weakness far exceeds muscle atrophy in RA patients. Therefore, the focus of our project is loss of contractile function as reflected by specific force, i.e, force per cross-sectional area. Our experimental model proposes that RA increases muscle exposure to proinflammatory cytokines that stimulate production of nitric oxide (NO) derivatives and reactive oxygen species (ROS) by muscle fibers. The resulting oxidative stress depresses specific force and causes weakness. Interventions that disrupt this chain of events are expected to preserve specific force, opposing RA-related weakness. We will test this model by using muscles from RA patients and a well-established mouse model of RA (collagen-induced arthritis, CIA) to address four specific aims: Specific Aim 1. To identify cytokines essential for RA-induced weakness. Specific Aim 2. To define changes in skeletal muscle oxidant production caused by RA. Specific Aim 3. To define cellular mechanisms of contractile dysfunction in RA. Specific Aim 4.To test therapeutic approaches for preserving muscle function in RA.

描述（由申请人提供）：类风湿关节炎（RA）是最常见的慢性炎性疾病，影响多达1％的人群。除了关节疼痛和僵硬之外，肌肉无力是RA患者最普遍的症状之一。弱点会影响大多数主要的肌肉群体，并限制了基本活动，例如从椅子上散步，坐着和上升，开放容器，自身打扮和个人卫生。弱点也有助于RA的姿势不稳定，使个体易于跌倒相关的伤害，并大大降低了整体生活质量。没有针对RA相关的弱点的药物治疗，也没有临床护理标准来解决这个令人衰弱的问题。该项目的目的是定义导致RA无力的过程，并确定未来药物开发的生物学靶标。 RA患者的弱点远远超过了肌肉萎缩。因此，我们项目的重点是特定力反映的收缩功能丧失，即每个横截面区域的力。我们的实验模型提出，RA会增加肌肉暴露于促炎细胞因子，这些细胞因子刺激一氧化氮（NO）衍生物的产生和肌肉纤维的活性氧（ROS）。所得的氧化应激会降低特定的力并导致无力。破坏这一事件链的干预措施预计将保留特定的力，与RA相关的弱点相反。我们将通过使用RA患者的肌肉和良好的RA小鼠模型（胶原蛋白引起的关节炎，CIA）来测试该模型，以解决四个特定目标：具体目标1。鉴定对RA诱导的弱点必不可少的细胞因子。具体目的2。定义由RA引起的骨骼肌氧化剂产生的变化。特定目的3。定义RA收缩功能障碍的细胞机制。特定目的4.测试用于保留RA肌肉功能的治疗方法。

项目成果

New insights into the benefits of exercise for muscle health in patients with idiopathic inflammatory myositis.

• DOI: 10.1007/s11926-014-0429-4
• 发表时间: 2014-07
• 期刊: CURRENT RHEUMATOLOGY REPORTS
• 影响因子: 5
• 作者: Munters, Li Alemo;Alexanderson, Helene;Crofford, Leslie J.;Lundberg, Ingrid E.
• 通讯作者: Lundberg, Ingrid E.

Nitrosative modifications of the Ca2+ release complex and actin underlie arthritis-induced muscle weakness.

• DOI: 10.1136/annrheumdis-2013-205007
• 发表时间: 2015-10
• 期刊: Annals of the rheumatic diseases
• 影响因子: 27.4
• 作者: Yamada T;Fedotovskaya O;Cheng AJ;Cornachione AS;Minozzo FC;Aulin C;Fridén C;Turesson C;Andersson DC;Glenmark B;Lundberg IE;Rassier DE;Westerblad H;Lanner JT
• 通讯作者: Lanner JT