Leukocytes

(noun)

Cells of the immune system involved in defending the body against both infectious disease and foreign materials. Five different and diverse types of leukocytes exist.

Related Terms

Examples of Leukocytes in the following topics:

  • MHC Polymorphism and Antigen Binding

    • MHC molecules display a molecular fraction called an epitope and mediate interactions of leukocytes with other leukocytes or body cells.
    • MHC molecules display a molecular fraction called an epitope and mediate interactions of leukocytes with other leukocytes or body cells.
    • Human MHC class I and II are also called human leukocyte antigen (HLA).
    • The human leukocyte antigen (HLA) system is the name of the major histocompatibility complex (MHC) in humans.

  • Cells and Organs of the Immune System

    • Leukocytes (white blood cells) are immune system cells involved in defending the body against infectious disease and foreign materials.
    • Five different types of leukocytes exist, all produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.
    • The innate leukocytes include the phagocytes, mast cells, eosinophils, basophils, and natural killer cells.
    • Natural killer cells are leukocytes that attack and destroy tumor cells, or cells that have been infected by viruses.
    • The cells of the adaptive immune system are special types of leukocytes, called lymphocytes .

  • Classes of T Cells

    • In response to antigenic stimulation, helper T cells (characterized by the expression of CD4 marker on their surface) secrete proteins called cytokines, whose function is to stimulate the proliferation and differentiation of the T cells themselves, as well as other cells, including B cells, macrophages, and other leukocytes.

  • Development of the Dual Lymphocyte System

    • The cells of the adaptive immune system are a type of leukocyte, called a lymphocyte.

  • Virus Attachment and Genome Entry

    • For example, HIV infects a limited range of human leukocytes.

  • Urinary Tract Infection (UTI)

    • In complicated cases, it may be useful to confirm the diagnosis via urinalysis, looking for the presence of urinary nitrites, white blood cells (leukocytes), or leukocyte esterase.

  • General Features of Virus Replication

    • For example, HIV can infect only a limited range of human leukocytes.

  • Cytotoxic Autoimmune Reactions

    • HLA-DR is a MHC class II cell surface receptor encoded by the human leukocyte antigen complex on chromosome 6 region 6p21.31.

  • The Roles of Genetics and Gender in Autoimmune Disease

    • HLA-DR is a MHC class II cell surface receptor encoded by the human leukocyte antigen complex on chromosome 6 region 6p21.31.