BLR&D Research Career Scientist Award Application

BLR

• 批准号: 10516044
• 负责人: KAREN A. HASTY
• 金额: --
• 依托单位: MEMPHIS VA MEDICAL CENTER
• 依托单位国家: 美国
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2023-09-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10516044
• 关键词: Acceleration; Adipose tissue; Advanced Development; Affect; Animal Model; Animals; Antibodies; Architecture; Area; Arthritis; Arthroscopy; Avidin; Award; Binding; Biotin; Bone Marrow Stem Cell; Cartilage; Cartilage Matrix; Cartilage injury; Cells; Chondrocytes; Chronic; Clinical Trials; Collagen Arthritis; Collagen Type II; Coupled; Data; Defect; Deformity; Degenerative polyarthritis; Detection; Development; Diagnosis; Disease; Disease Progression; Doctor of Philosophy; Domestic Pig; Drug Evaluation; Early Diagnosis; Early treatment; Encapsulated; Euthanasia; Evaluation; Family suidae; Funding; Future; Gene Expression; Glycoproteins; Goals; Growth; Histopathology; Human; Image; Immune; Immunologics; Incidence; Individual; Inflammation; Inflammatory Arthritis; Injury; Intra-Articular Injections; Investigation; Joints; Knee; Lesion; Ligands; Link; Liposomes; Longitudinal Studies; Macrophage; Matrix Metalloproteinases; Measures; Mechanical Stress; Mechanics; Meniscus structure of joint; Mesenchymal Stem Cells; Methods; Military Personnel; Modeling; Monitor; Monoclonal Antibodies; NF-kappa B; Occupational; Occupations; Operative Surgical Procedures; Optics; Oryctolagus cuniculus; Pain; Pathogenesis; Pathologic; Pathway interactions; Patients; Pharmacotherapy; Play; Population; Prevalence; Prevention; Procedures; Production; Proteins; Proteoglycan; Quality of life; Reconstructive Surgical Procedures; Regulation; Rehabilitation therapy; Replacement Arthroplasty; Research; Research Personnel; Reverse Transcriptase Polymerase Chain Reaction; Rhubarb food; Risk; Role; Scanning; Scientist; Site; Small Interfering RNA; Solid; Surface; Surgical Models; System; Techniques; Testing; Therapeutic Intervention; Thick; Time; Tissues; Traumatic Arthropathy; Traumatic injury; Treatment Efficacy; Veterans; Visualization; Weight-Bearing state; adipose derived stem cell; age related; arthropathies; articular cartilage; bone marrow mesenchymal stem cell; career; cartilage degradation; cartilage repair; cell injury; collagenase 3; disability; improved; in vivo; inhibitor; innovation; interest; joint destruction; joint inflammation; joint injury; local drug delivery; loss of function; meniscus injury; military veteran; mouse model; nanomedicine; nanoparticle; nanopolymer; novel; pharmacologic; prevent; programs; prototype; recruit; repaired; screening; subchondral bone; targeted treatment; theranostics; tool; treatment planning

Arthritis is the nation's leading cause of disability. Patients with a previous joint injury are at risk for early development of post-traumatic osteoarthritis (PTOA) even with reconstructive surgery. PTOA is seen in younger patients than age-related osteoarthritis and it has a higher incidence in populations that have high physical occupational demands (i.e., military personnel). Currently, PTOA treatment is primarily for pain until joints fail and joint replacement surgery, an expensive treatment associated with a long rehabilitation. The overall goal of my research is to develop a targeted nanomedicine that can halt cartilage degeneration, improve quality of life and reduce the need for joint replacement in patients. The ability to detect early cartilage damage in traumatic injury or degenerative arthritis has been limited, preventing treatment when therapies may be more beneficial. Depletion of proteoglycans/glycoproteins on the surface of the cartilage in these disorders results in unmasking of the underlying type II collagen (CII). This allows CII to serve as an immunologically recognizable target for monoclonal antibody to type II collagen (MabCII). Fluorescent MabCII can be used for diagnosis of cartilage injury or degeneration or MabCII coupled to nanosomes can target encapsulated drugs for localized delivery to the cartilage lesion. Our preliminary evidence shows a similar strategy can target and recruit reparative chondrocytes or mesenchymal stem cells to the damaged site. Thus, MabCII is used in a comprehensive treatment plan for directing reparative cells to lesions of the articular cartilage and meniscal cartilages and monitoring this by an innovative fluorescent arthroscopy. In addition, recruitment and integration of the reparative cells in the cartilage lesions is optimized by reducing matrix metalloproteinases (MMP) production in the joint by intra-articular injection of a pharmacological inhibitor of the activation of the nuclear factor kappa B (NF-KB) pathway encapsulated in MabCII-targeted nanosomes. These procedures are extremely novel and paradigm shifting for the diagnosis and treatment of joint injury and disease. I am using them for: (1) early diagnosis of damaged and degenerative areas of articular surface and meniscal cartilages in the pig knee using a sensitive, MabCII antibody-guided method of fluorescent arthroscopy (FA). Our PTOA model uses surgically-induced injuries to meniscal and articular cartilages in the knee of the domestic pig. The pig knee closely resembles a human joint in size, weight-bearing requirements and cartilage thickness. The damage is visualized through its binding to fluorescent MabCII using fluorescent arthroscopy, a new procedure that we have developed, and confirmed by histopathology. After FA characterization of the injury, (2) reparative cells are targeted to the area of damaged cartilages in the knee with MabCII antibody. We are investigating the therapeutic efficacy of fluorescent, MabCII-targeted chondrocytes or mesenchymal stem cells derived from bone marrow and adipose tissues intra-articularly injected into joints where articular or meniscal cartilages have been surgically damaged monitoring the cellular localization and persistence by FA. Cell to cell recruitment at the cartilage lesion in the knee is facilitated by an innovative system of biotin/avidin ligands on the surface of the reparative cells and multivalent antibody recruitment of cells binding type II collagen. Reparative tissues are analyzed over time by histopathology and gene expression by RT-PCR. We are (3) further optimizing the recruitment and integration of replacement cells in the cartilage lesion by treatment with MabCII-targeted nanosomes loaded with an inhibitor of the activation of the NF-κB pathway to minimize MMP, a known factor in degradation of cartilage matrices. Diminishing MMP production will be a prototypic target for enhancing reparative efforts. The MabCII- targeted nanosomes encapsulating a selective inhibitor of human IKK-2, an activator of the NF-κB pathway, will be used as a local delivery system to reduce MMPs in damaged cartilage lesions prior to treatment with reparative cells enhancing their survival at the degenerative site. !

关节炎是美国致残的主要原因。先前有关节损伤的患者早期有风险