Total number of immunocompetent cells in the normal rat epididymis and after vasectomy. 1995

P Hooper, and E Smythe, and R C Richards, and C V Howard, and R V Lynch, and D I Lewis-Jones
Department of Human Anatomy and Cell Biology, University of Liverpool, UK.

The aim of this study was to make unbiased quantitative estimates of the number of T8 cytotoxic cells and T4 helper cells and macrophages in the head and tail of rat epididymides, using newly developed design-based stereological methods in fertile control animals, and to compare these with results from vasectomized animals. The location of these cells within the intra- and interepithelial compartments of the epididymis was also studied. In control animals, both the T4 helper cells and macrophages and T8 cytotoxic cells were found in significantly higher numbers (P < 0.01) in the head interepithelial location than in the intraepithelial site. In addition, there were significantly more (P < 0.01) T8 cytotoxic cells in the tail interepithelial region. Within the head region of vasectomized rats, there was a significant increase in T8 cytotoxic cells in the intraepithelial location (P < 0.01), and a decrease in T4 helper cells and macrophages in the interepithelial region (P < 0.05). Serum samples from vasectomized animals, when compared with those from control animals, showed a significant increase in cytotoxic antisperm antibody. This suggests that, in response to the increased spermatozoal antigenic absorption that takes place in the epididymis after vasectomy, the immune system redistributes its T cell subsets to modify the immune tolerance that may occur.

UI MeSH Term Description Entries
D007121 Immunocompetence The ability of lymphoid cells to mount a humoral or cellular immune response when challenged by antigen. Competence, Immunologic,Immunologic Competence,Immunological Competence,Competence, Immunological
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
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
D008297 Male Males
D004822 Epididymis The convoluted cordlike structure attached to the posterior of the TESTIS. Epididymis consists of the head (caput), the body (corpus), and the tail (cauda). A network of ducts leaving the testis joins into a common epididymal tubule proper which provides the transport, storage, and maturation of SPERMATOZOA.
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
D013094 Spermatozoa Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility. Sperm,Spermatozoon,X-Bearing Sperm,X-Chromosome-Bearing Sperm,Y-Bearing Sperm,Y-Chromosome-Bearing Sperm,Sperm, X-Bearing,Sperm, X-Chromosome-Bearing,Sperm, Y-Bearing,Sperm, Y-Chromosome-Bearing,Sperms, X-Bearing,Sperms, X-Chromosome-Bearing,Sperms, Y-Bearing,Sperms, Y-Chromosome-Bearing,X Bearing Sperm,X Chromosome Bearing Sperm,X-Bearing Sperms,X-Chromosome-Bearing Sperms,Y Bearing Sperm,Y Chromosome Bearing Sperm,Y-Bearing Sperms,Y-Chromosome-Bearing Sperms
D013601 T-Lymphocytes Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen. T Cell,T Lymphocyte,T-Cells,Thymus-Dependent Lymphocytes,Cell, T,Cells, T,Lymphocyte, T,Lymphocyte, Thymus-Dependent,Lymphocytes, T,Lymphocytes, Thymus-Dependent,T Cells,T Lymphocytes,T-Cell,T-Lymphocyte,Thymus Dependent Lymphocytes,Thymus-Dependent Lymphocyte
D014659 Vasectomy Surgical removal of the ductus deferens, or a portion of it. It is done in association with prostatectomy, or to induce infertility. (Dorland, 28th ed) Intravasal Thread,Vas Ligation,Vas Occlusion,Vas Occlusion, Nonchemical,Vasectomy Seekers,Vasectomy Seekers, Refused,Intravasal Threads,Ligation, Vas,Ligations, Vas,Nonchemical Vas Occlusion,Nonchemical Vas Occlusions,Occlusion, Nonchemical Vas,Occlusion, Vas,Occlusions, Nonchemical Vas,Occlusions, Vas,Refused Vasectomy Seeker,Refused Vasectomy Seekers,Seeker, Refused Vasectomy,Seeker, Vasectomy,Seekers, Refused Vasectomy,Seekers, Vasectomy,Thread, Intravasal,Threads, Intravasal,Vas Ligations,Vas Occlusions,Vas Occlusions, Nonchemical,Vasectomies,Vasectomy Seeker,Vasectomy Seeker, Refused
D015496 CD4-Positive T-Lymphocytes A critical subpopulation of T-lymphocytes involved in the induction of most immunological functions. The HIV virus has selective tropism for the T4 cell which expresses the CD4 phenotypic marker, a receptor for HIV. In fact, the key element in the profound immunosuppression seen in HIV infection is the depletion of this subset of T-lymphocytes. T4 Cells,T4 Lymphocytes,CD4-Positive Lymphocytes,CD4 Positive T Lymphocytes,CD4-Positive Lymphocyte,CD4-Positive T-Lymphocyte,Lymphocyte, CD4-Positive,Lymphocytes, CD4-Positive,T-Lymphocyte, CD4-Positive,T-Lymphocytes, CD4-Positive,T4 Cell,T4 Lymphocyte

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