Definition

Noun: A laboratory technique used to visualize and locate specific proteins (antigens) in tissue samples. It works by using antibodies that bind to the target protein; these antibodies are linked to markers, such as fluorescent dyes or enzymes, which produce a detectable color or glow, allowing scientists to see where the protein is present under a microscope.

Usage

Immunohistochemistry is a fundamental tool in biomedical research and diagnostic pathology. * The diagnosis was confirmed using immunohistochemistry, which revealed the presence of the tumor-specific marker. * Immunohistochemistry on the brain tissue sample showed abnormal protein aggregates characteristic of the disease.* * Researchers employed immunohistochemistry to map the distribution of the receptor in different organs.*

Advanced Usage

• "Immunohistochemical" (adjective): Describes something related to or obtained through immunohistochemistry.
  • The immunohistochemical staining pattern was consistent with melanoma.
  • They performed an immunohistochemical analysis of the biopsy.
• "Immunohistochemically" (adverb): Describes an action performed using this technique.
  • The protein was immunohistochemically localized to the cell membrane.

Variants and Related Words

• Immunohistochemical (adj): Pertaining to immunohistochemistry.
• Immunohistochemically (adv): In a manner relating to immunohistochemistry.
• Immunocytochemistry (n): A closely related technique used to localize specific antigens in cultured cells rather than tissue sections.
• Immunofluorescence (n): A specific type of immunohistochemistry that uses fluorescent dyes as markers.

Synonyms

• Immunostaining (a more general term often used interchangeably in context)
• Immunohistochemical staining
• Antibody-based tissue staining

Related Phrases and Concepts

• Antibody-antigen interaction: The foundational principle on which immunohistochemistry is based.
• Chromogenic detection: A common method where an enzyme-linked antibody produces a colored precipitate.
• Fluorescent detection: A method where a fluorescent dye-linked antibody emits light of a specific color when excited by a particular wavelength.
• Formalin-fixed, paraffin-embedded (FFPE) tissue: The most common type of tissue sample prepared for immunohistochemistry.

Noun

1. an assay that shows specific antigens in tissues by the use of markers that are either fluorescent dyes or enzymes (such as horseradish peroxidase)