High-Throughput Microenvironment Regulation for Chondrogenesis

软骨形成的高通量微环境调节

基本信息

批准号：
9732428
负责人：
Eben Alsberg
金额：
$ 40.83万
依托单位：
UNIVERSITY OF ILLINOIS AT CHICAGO
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：
2019-04-01 至 2023-03-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9732428
关键词：
3-Dimensional Address Affect Animal Model Autologous Transplantation Biochemical Biocompatible Materials Biomechanics Bone Marrow Cartilage Cartilage injury Cells Cellularity Chondrogenesis Clinic Clinical Clinical Engineering Communities Cues Defect Development Engineering Ensure Extracellular Matrix Financial cost Future Goals Growth Factor Hip Osteoarthritis Hospitalization Human Hydrogels In Vitro Individual Injury Knee Osteoarthritis Knowledge Mechanical Stimulation Mechanics Medical Mesenchymal Stem Cells Microfabrication Musculoskeletal Natural regeneration Nature New Zealand Operative Surgical Procedures Orthopedics Oryctolagus cuniculus Pathway interactions Patients Performance Play Population Procedures Production Property Regulation Research Research Personnel Research Proposals Role Safety Signal Transduction Source System Testing Time Tissue Engineering Tissues Variant aged articular cartilage base cartilage regeneration clinically relevant combinatorial design experience improved in vitro testing in vivo in vivo Model in vivo regeneration mechanical load minimally invasive osteochondral tissue public health relevance regenerative therapy repaired response stem cell differentiation stem cell proliferation subchondral bone tissue injury

项目摘要

DESCRIPTION (provided by applicant): Musculoskeletal tissue injuries remain a significant challenge in orthopaedics research. For example, currently, millions of patients are suffering from cartilage injuries, with associated annual financial costs of more than $100 billion dollars. There are several viable clinical options to address these injuries. In this context, human mesenchymal stem cells (hMSCs) are a promising cell source for cartilage tissue engineering as they are capable of differentiating down the chondrogenic pathway, can be obtained from bone marrow in a minimally invasive manner, and are easily grown in culture. Although differentiation of hMSCs is regulated by soluble molecules, insoluble biochemical signals and mechanical cues, the combinatorial effects of mechanical loading and biomaterial signals are largely unknown. Our central hypothesis is that the use of high-throughput systems (HTSs) under mechanical stimulation can be used to elucidate single and synergistic microenvironmental factors for directing the chondrogenic differentiation of hMSCs, and thereby functional engineered cartilage formation in vitro and in a clinically relevant in vivo model. The information obtained from the HTS will help in the development of macroscale constructs with enhanced chondrogenesis, and the performance of these constructs will be validated in vivo by treating critical-sized articular cartilage defects. These goals will be accomplished by achieving the following specific Aims: (1) to develop three dimensional (3D) combinatorial HTS hydrogel-based microarrays, consisting of different extracellular matrix molecules and growth factors, which can be mechanically deformed to mimic the chondrogenic microenvironment of hMSCs, (2) to evaluate quantitatively the chondrogenic differentiation response of hMSCs in 3D combinatorial HTS microarrays and macroscale constructs selected from these microarrays, and (3) to determine the potential of hMSC-laden constructs with HTS-identified compositions and mechanical stimulation regimes to induce cartilage regeneration in vivo. The orthopedic community would benefit from a better understanding of these chondroinductive microenvironments that will ultimately induce neo-tissue formation and will represent a viable alternative to current clinical therapies. While the ultimate objective of this research is to engineer clinically relevant articular cartilage therapies, this HTS can also be applicable to test regeneration strategies for other tissues.

描述（由申请人提供）：肌肉骨骼组织损伤仍然是骨科研究中的重大挑战，例如，目前有数百万患者遭受软骨损伤，相关的年度财务费用超过 1000 亿美元。有几种可行的临床选择。在这种情况下，人类间充质干细胞（hMSC）是软骨组织工程的一个有前途的细胞来源，因为它们能够分化软骨形成途径，可以以微创方式从骨髓中获得，并且很容易在培养物中生长。尽管 hMSC 的分化受到可溶性分子、不溶性生化信号和机械信号的调节，但机械负荷和生物材料信号的组合效应在很大程度上是未知的。中心假设是，在机械刺激下使用高通量系统（HTS）可用于阐明指导 hMSC 软骨形成分化的单一和协同微环境因素，从而在体外和临床相关的体内模型中进行功能工程软骨形成从 HTS 获得的信息将有助于开发具有增强软骨形成的宏观结构，并且这些结构的性能将通过治疗临界尺寸的关节在体内得到验证。这些目标将通过实现以下具体目标来实现：(1) 开发基于 HTS 水凝胶的三维 (3D) 组合微阵列，由不同的细胞外基质分子和生长因子，可以机械变形以模拟 hMSC 的软骨形成微环境，（2）定量评估 3D 组合 HTS 微阵列和选自这些微阵列的宏观构建体中 hMSC 的软骨形成分化反应，以及（3）确定具有 HTS 鉴定的成分和机械刺激方案的 hMSC 负载构建体可诱导体内软骨再生，骨科界将从中受益。更好地了解这些软骨诱导微环境，最终将诱导新组织形成，并将成为当前临床疗法的可行替代方案。虽然这项研究的最终目标是设计临床相关的关节软骨疗法，但该 HTS 也可用于测试。其他组织的再生策略。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（4）

Jammed Micro-Flake Hydrogel for Four-Dimensional Living Cell Bioprinting.

DOI：
10.1002/adma.202109394
发表时间：
2022-04
期刊：
ADVANCED MATERIALS
影响因子：
29.4
作者：
Ding, Aixiang;Jeon, Oju;Cleveland, David;Gasvoda, Kaelyn L.;Wells, Derrick;Lee, Sang Jin;Alsberg, Eben
通讯作者：
Alsberg, Eben

Spatial Micropatterning of Growth Factors in 3D Hydrogels for Location-Specific Regulation of Cellular Behaviors.