Biomaterial Database

The nature of Langerhans cells granules: an ultrastructural study. 1982

N G El-Labban

Langerhans cells and macrophages have been studied in both oral lichen planus lesions and histiocytosis X. Many of the macrophages in both lesions contained phagolysosomes in various stages of degradation. Some of these phagolysosomes were found to develop slender processes and very narrow extensions containing little processed phagocytosed material. These latter structures were indistinguishable from Langerhans granules and were termed Langerhans granule-like structures. There is enough evidence in the present study to suggest that typical Langerhans granules evolve from Langerhans granule-like structures and to confirm that Langerhans cells are a type of macrophage which at one stage of their development show Langerhans granules.

UI	MeSH Term	Description	Entries
D007801	Langerhans Cells	Recirculating, dendritic, antigen-presenting cells containing characteristic racket-shaped granules (Birbeck granules). They are found principally in the stratum spinosum of the EPIDERMIS and are rich in Class II MAJOR HISTOCOMPATIBILITY COMPLEX molecules. Langerhans cells were the first dendritic cell to be described and have been a model of study for other dendritic cells (DCs), especially other migrating DCs such as dermal DCs and INTERSTITIAL DENDRITIC CELLS.	Langerhans Cell,Dendritic Cells, Dermal,Dendritic Cells, Epidermal,Dendritic Cells, Skin,Dermal Dendritic Cells,Epidermal Dendritic Cells,Skin Dendritic Cells,Cell, Dermal Dendritic,Cell, Epidermal Dendritic,Cell, Langerhans,Cell, Skin Dendritic,Cells, Dermal Dendritic,Cells, Epidermal Dendritic,Cells, Langerhans,Cells, Skin Dendritic,Dendritic Cell, Dermal,Dendritic Cell, Epidermal,Dendritic Cell, Skin,Dermal Dendritic Cell,Epidermal Dendritic Cell,Skin Dendritic Cell
D008010	Lichen Planus	An inflammatory, pruritic disease of the skin and mucous membranes, which can be either generalized or localized. It is characterized by distinctive purplish, flat-topped papules having a predilection for the trunk and flexor surfaces. The lesions may be discrete or coalesce to form plaques. Histologically, there is a "saw-tooth" pattern of epidermal hyperplasia and vacuolar alteration of the basal layer of the epidermis along with an intense upper dermal inflammatory infiltrate composed predominantly of T-cells. Etiology is unknown.	Cutaneous Lichen Planus,Lichen Planopilaris,Lichen Ruber Planus,Mucosal Lichen Planus,Lichen Rubra Planus,Lichen Planus, Cutaneous,Lichen Planus, Mucosal,Planopilaris, Lichen
D008264	Macrophages	The relatively long-lived phagocytic cell of mammalian tissues that are derived from blood MONOCYTES. Main types are PERITONEAL MACROPHAGES; ALVEOLAR MACROPHAGES; HISTIOCYTES; KUPFFER CELLS of the liver; and OSTEOCLASTS. They may further differentiate within chronic inflammatory lesions to EPITHELIOID CELLS or may fuse to form FOREIGN BODY GIANT CELLS or LANGHANS GIANT CELLS. (from The Dictionary of Cell Biology, Lackie and Dow, 3rd ed.)	Bone Marrow-Derived Macrophages,Monocyte-Derived Macrophages,Macrophage,Macrophages, Monocyte-Derived,Bone Marrow Derived Macrophages,Bone Marrow-Derived Macrophage,Macrophage, Bone Marrow-Derived,Macrophage, Monocyte-Derived,Macrophages, Bone Marrow-Derived,Macrophages, Monocyte Derived,Monocyte Derived Macrophages,Monocyte-Derived Macrophage
D008854	Microscopy, Electron	Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.	Electron Microscopy
D009059	Mouth Diseases	Diseases involving the MOUTH.	Disease, Mouth,Diseases, Mouth,Mouth Disease
D009061	Mouth Mucosa	Lining of the ORAL CAVITY, including mucosa on the GUMS; the PALATE; the LIP; the CHEEK; floor of the mouth; and other structures. The mucosa is generally a nonkeratinized stratified squamous EPITHELIUM covering muscle, bone, or glands but can show varying degree of keratinization at specific locations.	Buccal Mucosa,Oral Mucosa,Mucosa, Mouth,Mucosa, Oral
D003594	Cytoplasmic Granules	Condensed areas of cellular material that may be bounded by a membrane.	Cytoplasmic Granule,Granule, Cytoplasmic,Granules, Cytoplasmic
D006646	Histiocytosis, Langerhans-Cell	A group of disorders resulting from the abnormal proliferation of and tissue infiltration by LANGERHANS CELLS which can be detected by their characteristic Birbeck granules (X bodies), or by monoclonal antibody staining for their surface CD1 ANTIGENS. Langerhans-cell granulomatosis can involve a single organ, or can be a systemic disorder.	Histiocytosis X,Langerhans-Cell Granulomatosis,Langerhans-Cell Histiocytosis,Hand-Schueller-Christian Disease,Hand-Schueller-Christian Syndrome,Hand-Schüller-Christian Disease,Hand-Schüller-Christian Syndrome,Hashimoto-Pritzger Disease,Histiocytosis, Generalized,Histiocytosis-X,Langerhans Cell Granulomatosis,Langerhans Cell Granulomatosis, Pulmonary,Langerhans Cell Histiocytosis,Letterer-Siwe Disease,Non-Lipid Reticuloendotheliosis,Pulmonary Histiocytosis X,Pulmonary Langerhans Cell Granulomatosis,Schueller-Christian Disease,Systemic Aleukemic Reticuloendotheliosis,Type 2 Histiocytosis,Aleukemic Reticuloendothelioses, Systemic,Aleukemic Reticuloendotheliosis, Systemic,Cell Granulomatoses, Langerhans,Cell Granulomatosis, Langerhans,Cell Histiocytoses, Langerhans,Cell Histiocytosis, Langerhans,Disease, Hand-Schueller-Christian,Disease, Hand-Schüller-Christian,Disease, Hashimoto-Pritzger,Disease, Letterer-Siwe,Disease, Schueller-Christian,Diseases, Hashimoto-Pritzger,Generalized Histiocytoses,Generalized Histiocytosis,Granulomatoses, Langerhans Cell,Granulomatosis, Langerhans Cell,Granulomatosis, Langerhans-Cell,Hand Schueller Christian Disease,Hand Schueller Christian Syndrome,Hand Schüller Christian Disease,Hand Schüller Christian Syndrome,Hashimoto Pritzger Disease,Hashimoto-Pritzger Diseases,Histiocytoses, Generalized,Histiocytoses, Langerhans Cell,Histiocytoses, Type 2,Histiocytosis X, Pulmonary,Histiocytosis, Langerhans Cell,Histiocytosis, Type 2,Langerhans Cell Granulomatoses,Langerhans Cell Histiocytoses,Letterer Siwe Disease,Non Lipid Reticuloendotheliosis,Non-Lipid Reticuloendothelioses,Reticuloendothelioses, Non-Lipid,Reticuloendothelioses, Systemic Aleukemic,Reticuloendotheliosis, Non-Lipid,Reticuloendotheliosis, Systemic Aleukemic,Schueller Christian Disease,Syndrome, Hand-Schueller-Christian,Syndrome, Hand-Schüller-Christian,Systemic Aleukemic Reticuloendothelioses,Type 2 Histiocytoses
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man