Biomaterial Database

Lymphocyte subpopulations in mediastinal milky spots of mice: light- and electron-microscopic immunohistochemical observations. 1992

N Inoue, and Y Otsuki

Department of Anatomy, Osaka Medical College, Takatsuki, Japan.

The structure and distribution of cellular components in the mediastinal milky spots of C57BL/6 mice were studied by electron microscopy and immunohistochemistry. The mediastinal milky spots were generally covered with plump mesothelial cells with hemidesmosome-like structures in small projections of the cytoplasm, and consisted mainly of clusters of lymphocytes, macrophages and fibroblasts. Macrophages and lymphocytes were often seen passing between mesothelial cells and migrating into the pleural cavity. Neither high endothelial venules (HEV) nor lymphatics were present in the mediastinal milky spots. Thy-1(CD5)-, L3/T4(CD4)- and Lyt-2(CD8)-positive cells were located predominantly at the basal area adjacent to fat cells under the lymphoid tissue. IgG- and Ia-positive cells dominated throughout the lymphoid tissue, whereas IgM-positive cells were observed in the lymphoid tissue other than the basal area. Mediastinal milky spots showed a specific distribution of lymphocyte subsets: the T cell area comprised the basal area, and the B cell area was mainly other areas. The mean percentages of CD4-, CD8-, IgM-, IgG- and IgA-positive cells in the mediastinal milky spots were 16.5%, 20.1%, 28.8%, 37.3% and 2.1%, respectively; the percentage of B cells was higher than that of T cells. IgG- and IgM-positive cells were the main lymphocyte subsets in the mediastinal milky spots. The most characteristic finding was that IgA-positive cells were a very minor cellular component.

UI	MeSH Term	Description	Entries
D007150	Immunohistochemistry	Histochemical localization of immunoreactive substances using labeled antibodies as reagents.	Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D008482	Mediastinum	A membrane in the midline of the THORAX of mammals. It separates the lungs between the STERNUM in front and the VERTEBRAL COLUMN behind. It also surrounds the HEART, TRACHEA, ESOPHAGUS, THYMUS, and LYMPH NODES.
D008810	Mice, Inbred C57BL	One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases.	Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D008853	Microscopy	The use of instrumentation and techniques for visualizing material and details that cannot be seen by the unaided eye. It is usually done by enlarging images, transmitted by light or electron beams, with optical or magnetic lenses that magnify the entire image field. With scanning microscopy, images are generated by collecting output from the specimen in a point-by-point fashion, on a magnified scale, as it is scanned by a narrow beam of light or electrons, a laser, a conductive probe, or a topographical probe.	Compound Microscopy,Hand-Held Microscopy,Light Microscopy,Optical Microscopy,Simple Microscopy,Hand Held Microscopy,Microscopy, Compound,Microscopy, Hand-Held,Microscopy, Light,Microscopy, Optical,Microscopy, Simple
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
D005260	Female		Females
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000941	Antigens	Substances that are recognized by the immune system and induce an immune reaction.	Antigen
D016131	Lymphocyte Subsets	A classification of lymphocytes based on structurally or functionally different populations of cells.	Lymphocyte Subpopulations,Lymphocyte Subpopulation,Lymphocyte Subset,Subpopulation, Lymphocyte,Subpopulations, Lymphocyte,Subset, Lymphocyte,Subsets, Lymphocyte
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus