common lymphoid progenitor

common lymphoid progenitor

The common lymphoid progenitor (CLP) arises from the multipotential hematopoietic stem cell in the bone marrow. Hematopoietic stem cells have the unique capability of developing into any type of blood cell depending on the body's requirements. In contrast, common lymphoid progenitors are already committed to the lymphoid lineage but are still oligopotent with the capability to further differentiate into various types of lymphoid cells. In mice, cells in the common lymphoid progenitor population in the bone marrow can be identified by their Lin- IL7rα+ c-Kit+ Sca-1+ cell surface phenotype. The IL-7 receptor is first expressed on common lymphoid progenitor cells and distinguishes them from primitive common myeloid progenitors, and IL-7 is thought to play a critical role in the downstream development and homeostasis of immune cells. CLPs give rise to B lymphocytes, T lymphocytes, dendritic cells, and natural killer cells, all of which play a crucial and distinct role in immune responses. B and T lymphocytes are responsible for adaptive immunity, allowing the body to recognize and remember specific pathogens to fight them off more effectively in the future. B lymphocytes are responsible for producing antibodies, while T lymphocytes either help regulate immune responses or directly kill infected cells. Natural Killer cells are part of the body’s innate immune response, providing immediate, nonspecific defense against pathogens. They are able to interact with infected or malignant cells and induce controlled cell death, or apoptosis, effectively eliminating the threat to bodily health. Dendritic cells link the innate and adaptive immune systems by presenting antigens to T cells, promoting an adaptive response. Thus, common lymphoid progenitors provide the basis for the body's strategic and layered defense against varied and evolving external threats, making them an essential part of the immune system. (This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies only to some subtypes and species, and so should not be considered definitional.)

CLP are CD7-positive, CD10-positive, CD19-negative, CD34-positive, CD45RA-positive, CD79a-negative, CD127-positive, AA4.1-positive, RAG-negative, Sca-1-low, sIgM-negative, sIgD-negative, TdT-negative, Vpre-B-negative, and pre-BCR-negative. Expression of transcription factors include E2A-positive, EBF-positive, Ikaros-negative, PU.1-negative, and Pax5-negative.

CL:0000051

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ZFA:0009023