Lymphopoiesis (lĭm'fō-poi-ē'sĭs) (or lymphocytopoiesis) is the generation of lymphocytes, one of the five types of white blood cells (WBCs). It is more formally known as lymphoid hematopoiesis.
Disruption in lymphopoiesis can lead to a number of lymphoproliferative disorders, such as lymphomas and lymphoid leukemias.
Lymphocytes are of the lymphoid (rather than the myeloid or erythroid) lineage of blood cells.
Nomenclature is not trivial in this case, because, although lymphocytes are found in the bloodstream and originate in the bone marrow, they principally belong to the separate lymphatic system which interacts with the blood circulation.
Lymphopoiesis is now usually used interchangeably with the term "lymphocytopoiesis" – the making of lymphocytes – but other sources may distinguish between the two, stating that "lymphopoiesis" additionally refers to creating lymphatic tissue, while "lymphocytopoiesis" refers only to the creation of cells in that tissue. It is rare now for lymphopoiesis to refer to the creation of lymphatic tissues.
Myelopoiesis refers to 'generation of cells of the myeloid lineage' and erythropoiesis refers to 'generation of cells of the erythroid lineage' etc., so parallel usage has evolved in which lymphopoiesis refers to 'generation of cells of the lymphoid lineage'.
Observations on research going back well over 100 years had elucidated the two great classes of WBCs – myeloid and lymphoid – and great advances in medicine and science have resulted from these studies. It was only natural to ask where these two great classes of cells arose, and after much work two cell types with some strong stem cell properties were isolated and defined – CMP, the common myeloid progenitor and CLP, the common lymphoid progenitor for mice. But science is an additive game, and it was eventually found these progenitors were not unique, and further that the two great families of myeloid and lymphoid were not disjoint, but rather two partially interwoven family trees.
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.
Immunoengineering is an emerging field where engineering principles are grounded in immunology. This course provides students a broad overview of how engineering approaches can be utilized to study im
Ce cours décrit le fonctionnement du système immunitaire humain et les bases immunologiques de la vaccination, de la transplantation, de l'immunothérapie, et de l'allergie. Il présente aussi le rôle d
This course introduces the fundamentals of stem cell biology, with a particular focus on the role of stem cells during development, tissue homeostasis/regeneration and disease, and the generation of o
Explore la pertinence clinique des cellules souches hématopoïétiques, y compris les procédures de transplantation, les tests et les applications cliniques.
Explore les fonctions des cellules effectrices dans le système immunitaire, y compris les cellules épithéliales, les cellules dendritiques, les leucocytes et les cellules tueuses naturelles.
Couvre l'évasion de la pression immunitaire par les tumeurs, les immunothérapies du cancer, les stratégies d'administration de médicaments, et l'impact des caractéristiques des nanoparticules sur la pénétration des tumeurs.
Les cellules lymphoïdes innées (CLI, en anglais innate lymphoid cells [ILCs]) constituent une famille de cellules immunitaires innées qui jouent un rôle central dans le remodelage tissulaire. Les CLI peuvent se définir par trois caractéristiques principales : l'absence de récepteurs à antigène à réarrangement (RAG)-dépendant ; l'absence de marqueurs phénotypiques myéloïdes ou dendritiques ; une morphologie de type lymphoïde.
Stromal cells, or mesenchymal stromal cells, are differentiating cells found in abundance within bone marrow but can also be seen all around the body. Stromal cells can become connective tissue cells of any organ, for example in the uterine mucosa (endometrium), prostate, bone marrow, lymph node and the ovary. They are cells that support the function of the parenchymal cells of that organ. The most common stromal cells include fibroblasts and pericytes. The term stromal comes from Latin stromat-, "bed covering", and Ancient Greek στρῶμα, , "bed".
Le syndrome lymphoprolifératif est une prolifération de cellules d'origine lymphoïde. Ce syndrome survient chez des patients ayant des troubles du système immunitaire. Ils sont parfois désignés sous le terme de « désordre immunoprolifératif », mais le syndrome lymphoprolifératif est une composante des désordres immunoprolifératifs, comme les hypergammaglobulinémies sont une composante des paraprotéinémie.
Ce cours décrit les mécanismes fondamentaux du système immunitaire pour mieux comprendre les bases immunologiques dela vaccination, de la transplantation, de l’immunothérapie, de l'allergie et des mal
We developed a method for generating dendritic cell progenitors (DCPs) from hematopoietic stem and progenitor cells isolated from bone marrow or blood. When engineered to express IL-12 and FLT3L, these DCPs reprogram the tumor microenvironment and elicit a ...
Dendritic cells (DCs) are specialized myeloid cells with the ability to uptake, process, andpresent antigens to T lymphocytes. They also generate cytokine and chemokine gradients thatregulate immune cell trafficking, activation, and function. Monocyte-deri ...
Gut -draining mesenteric and celiac lymph nodes (mLNs and celLNs) critically contribute to peripheral tolerance toward food and microbial antigens by supporting the de novo induction of regulatory T cells (Tregs). These tolerogenic properties of mLNs and c ...