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Related Experiment Videos

Mouse c1q: light and electron microscopic immunohistochemical localization

L M McManus, P K Nakane

    Journal of Immunology (Baltimore, Md. : 1950)
    |April 1, 1981
    PubMed
    Summary
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    Complement component 1q (C1q) is found in specific immune cells and kidney glomeruli in mice. This study maps C1q distribution, revealing potential sites of its synthesis in normal mouse tissues.

    Area of Science:

    • Immunology
    • Cell Biology
    • Histology

    Background:

    • Complement component 1q (C1q) is crucial for the classical complement pathway.
    • Understanding C1q tissue distribution is key to elucidating its functions.
    • Previous studies have limited data on C1q localization in normal mouse tissues.

    Purpose of the Study:

    • To comprehensively map the tissue localization of C1q in adult and neonatal mice.
    • To identify potential sites of C1q biosynthesis within normal mouse tissues.
    • To investigate C1q association with specific cell types and organelles.

    Main Methods:

    • Immunohistochemistry on various mouse tissues (lymph nodes, spleen, Peyer's patches, kidneys, intestines).
    • Ultrastructural analysis of C1q-positive foci using electron microscopy.

    Related Experiment Videos

  • In vitro culture of mouse peritoneal cells to assess C1q presence.

    • Main Results:

    • C1q predominantly localized to focal areas in lymphoid organs (lymph nodes, spleen, Peyer's patches), often near germinal centers.
    • Ultrastructural studies revealed intracellular C1q within the endoplasmic reticulum of mononucleated cells with extensive cytoplasm.
    • C1q was detected in renal glomeruli of adult mice and intestinal epithelium of neonatal mice, but not in adult intestinal or urinary tract epithelium.

    Conclusions:

    • C1q exhibits a distinct tissue distribution pattern in mice, concentrated in immune-related tissues and renal glomeruli.
    • Intracellular C1q in specific mononucleated cells suggests local synthesis sites.
    • The developmental and tissue-specific localization of C1q highlights its diverse roles in innate immunity and tissue homeostasis.