Immunocytochemistry

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Immunocytochemistry[edit | edit source]

Immunohistochemistry staining of tissue sections.

Immunocytochemistry (ICC) is a common laboratory technique used to anatomically visualize the localization of a specific protein or antigen in cells by use of a specific antibody that binds to it. This technique is a powerful tool in the fields of cell biology and molecular biology.

Principles[edit | edit source]

Immunocytochemistry involves the use of antibodies to detect proteins in cells. The antibodies are typically linked to a fluorescent dye or an enzyme that produces a colorimetric reaction, allowing for visualization under a microscope. The process begins with the fixation of cells, which preserves cellular structure and immobilizes antigens. Following fixation, cells are permeabilized to allow antibodies to access intracellular targets.

Applications[edit | edit source]

Immunocytochemistry is widely used in research and clinical diagnostics. It is employed to:

  • Identify the presence and localization of proteins within cells.
  • Study the distribution and abundance of proteins in different cell types.
  • Diagnose diseases by detecting abnormal protein expression patterns.

Techniques[edit | edit source]

There are several variations of immunocytochemistry, including:

  • Direct ICC: Involves the use of a primary antibody directly conjugated to a detectable label.
  • Indirect ICC: Utilizes an unlabeled primary antibody followed by a labeled secondary antibody that binds to the primary antibody.

Comparison with Immunohistochemistry[edit | edit source]

Comparison of immunocytochemistry and immunohistochemistry.

Immunocytochemistry is often compared to immunohistochemistry (IHC), which is used to detect antigens in tissue sections. While ICC is performed on isolated cells, IHC is performed on sections of tissue. Both techniques share similar principles but differ in their applications and sample preparation methods.

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