Regenerative stem and progenitor cells

Regenerative stem and progenitor cells are a diverse population of undifferentiated cells defined by their ability to self-renew and differentiate into specialized cell types to maintain tissue homeostasis and repair damage (NIH, 2023). This category encompasses various cell types, including hematopoietic stem cells (HSCs), mesenchymal stem cells (MSCs), and induced pluripotent stem cells (iPSCs), each with distinct potencies and biological roles (PubMed, 2021). In clinical practice, these cells are targeted to treat a wide range of conditions, such as hematological malignancies, cardiovascular diseases, and neurodegenerative disorders (StatPearls, 2023). Pharmacological intervention often involves the use of growth factors like Filgrastim to mobilize endogenous progenitors or the administration of ex vivo expanded cell products like Remestemcel-L (FDA, 2024). While these cells offer transformative potential for regenerative medicine, they also present significant safety challenges, including the risk of teratoma formation, immune rejection, and unintended differentiation (Nature Reviews Drug Discovery, 2020). Beyond direct cell replacement, regenerative stem and progenitor cells serve as critical models for drug discovery and toxicity testing, particularly through the development of organoids and organ-on-a-chip systems (NIH, 2022). These models allow for the study of human-specific responses that are often poorly captured in animal models, facilitating the identification of novel molecular targets within the stem cell niche. The interaction between these cells and their microenvironment, or niche, is a key area of therapeutic interest, as niche-derived signals are essential for maintaining stemness or triggering differentiation (PubMed, 2023). Consequently, the field is moving towards in situ regeneration, where small molecules are used to pharmacologically manipulate the local environment to promote the activation and recruitment of resident progenitor cells to sites of injury (Nature, 2021).

Other names

Stem cellsProgenitor cellsMultipotent stem cellsPluripotent stem cellsAdult stem cellsSomatic stem cellsTissue-specific stem cells

Stimulation of endogenous stem cell mobilization, proliferation, and differentiation via cytokine signaling or exogenous cell replacement and paracrine modulation.