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Related Experiment Videos

Variability in gold bead density in cells. Quantitative immunocytochemistry.

I Hammel1, M Elmalek, M Castel

  • 1Department of Pathology, Sackler School o Medicine, Tel-Aviv University, Israel.

Histochemistry
|January 1, 1989
PubMed
Summary

Gold bead distribution varied significantly between individual pituitary cells, even within the same cell type. This variability in immunocytochemistry labeling density suggests underlying physiological differences between cells.

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Area of Science:

  • Cell Biology
  • Neuroendocrinology
  • Immunocytochemistry

Background:

  • Immunocytochemistry is a key technique for visualizing cellular components.
  • Variability in labeling density can impact data interpretation.
  • Understanding cell-to-cell variation is crucial in biological studies.

Purpose of the Study:

  • To investigate the distribution variability of gold beads in immunocytochemically labeled cells.
  • To compare gold bead distribution in pituitary melanotrophic cells (ACTH) and neurohypophysial terminals (oxytocin-neurophysin).

Main Methods:

  • Immunocytochemistry was used to label specific hormones (ACTH and oxytocin-neurophysin) in pituitary and neurohypophysial tissues.
  • Gold beads were used as labels and their density was quantified per micron squared.

Related Experiment Videos

  • Distribution of gold beads within secretory granules was analyzed.

    • Main Results:

    • Gold beads were exclusively found within secretory granules in both cell types.
    • Significant variability in gold bead density was observed between individual melanotrophic cells (100-480 beads/µm²) and neurohypophysial terminals (460-900 beads/µm²).
    • Labeling density varied even within morphologically homogeneous cell populations.

    Conclusions:

    • Cell-to-cell variability in gold bead distribution is a notable phenomenon in immunocytochemistry.
    • This variability may reflect intrinsic physiological differences between individual cells or axon terminals.
    • Calculating the coefficient of variation of mean gold bead density is recommended for comparing individual cells.