Perspective: Is It Time to Rename MSC (Mesenchymal Stem Cells/Medicinal Signaling Cells) with a Name that Reflects Their Combined <i>In Vivo </i>Functions and Their <i>In Vitro </i>Abilities?—Possibly “Pluripotent Mesenchymal Regulatory Cells (PMRC)”  

作　　者：David A. Hart David A. Hart(Department of Surgery and Faculty of Kinesiology, University of Calgary, Calgary, Alberta Canada;McCaig Institute for Bone & Joint Health, University of Calgary, Calgary, Alberta Canada;Bone & Joint Health Strategic Clinical Network, Alberta Health Services, Edmonton, Alberta Canada)

机构地区：[1]Department of Surgery and Faculty of Kinesiology, University of Calgary, Calgary, Alberta Canada [2]McCaig Institute for Bone & Joint Health, University of Calgary, Calgary, Alberta Canada [3]Bone & Joint Health Strategic Clinical Network, Alberta Health Services, Edmonton, Alberta Canada

出　　处：《Journal of Biomedical Science and Engineering》2021年第8期317-324,共8页生物医学工程（英文）

摘　　要：Over 30 years ago, it was reported by Caplan that cells could be found in various adult tissues and fluids of a variety of species that could be induced <em>in vitro</em> to progress towards lineages such as chondrogenesis, osteogenesis and adipogenesis with different “cocktails” of reagents. These cells were called Mesenchymal Stem Cells (MSC) to reflect this pluripotency. After 30 years of intense research effort to directly use such cells for the repair or regeneration of damaged or injured tissues, the effort has met with limited<em> in vivo</em> success, but their use for <em>in vitro</em> tissue engineering has met with some success. This failure to live up to expectations for<em> in vivo</em> differentiation success has led Caplan to recently rename these cells Medicinal Signaling Cells (MSC) to reflect other abilities of these cells to secrete mediators and release exosomes containing biologically active molecules that can influence their neighboring cells in a paracrine manner. However, neither of these names completely captures the combined apparent <em>in vivo</em> functioning of MSC and their <em>in vitro</em> abilities to exhibit pluripotent behavior. Thus, it is suggested, based on the attributes of these cells and their tissue and clonal heterogeneity, that an alternative name be applied to these cells and they be described as Pluripotent Mesenchymal Regulatory Cells (PMRC). This name reflects their regulatory function as pericytes in tissues, as well as their well-known immunoregulatory activity when injected into the intra-articular space and their influence on activities such as wound healing. It also reflects their ability to differentiate along several different lineages to facilitate tissue engineering approaches for tissue repair.Over 30 years ago, it was reported by Caplan that cells could be found in various adult tissues and fluids of a variety of species that could be induced <em>in vitro</em> to progress towards lineages such as chondrogenesis, osteogenesis and adipogenesis with different “cocktails” of reagents. These cells were called Mesenchymal Stem Cells (MSC) to reflect this pluripotency. After 30 years of intense research effort to directly use such cells for the repair or regeneration of damaged or injured tissues, the effort has met with limited<em> in vivo</em> success, but their use for <em>in vitro</em> tissue engineering has met with some success. This failure to live up to expectations for<em> in vivo</em> differentiation success has led Caplan to recently rename these cells Medicinal Signaling Cells (MSC) to reflect other abilities of these cells to secrete mediators and release exosomes containing biologically active molecules that can influence their neighboring cells in a paracrine manner. However, neither of these names completely captures the combined apparent <em>in vivo</em> functioning of MSC and their <em>in vitro</em> abilities to exhibit pluripotent behavior. Thus, it is suggested, based on the attributes of these cells and their tissue and clonal heterogeneity, that an alternative name be applied to these cells and they be described as Pluripotent Mesenchymal Regulatory Cells (PMRC). This name reflects their regulatory function as pericytes in tissues, as well as their well-known immunoregulatory activity when injected into the intra-articular space and their influence on activities such as wound healing. It also reflects their ability to differentiate along several different lineages to facilitate tissue engineering approaches for tissue repair.

关 键 词：Mesenchymal Stem Cells Medicinal Signaling Cells Pluripotent Cells Pluripotent Mesenchymal Regulatory Cells 

分 类 号：R73[医药卫生—肿瘤]