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Related Experiment Videos

Impression cytology in Down's syndrome

M Filippello1, G Cascone, A Zagami

  • 1Department of Ophthalmology, Oasi Institute for Research on Mental Retardation and Brain Aging (IRCCS), Troina, Italy.

The British Journal of Ophthalmology
|August 1, 1997
PubMed
Summary

Patients with Down's syndrome have significantly fewer goblet cells in their eyes, which may explain tear film issues and increase infection risk. This study quanties the reduction in these crucial mucin-producing cells.

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Area of Science:

  • Ophthalmology
  • Genetics
  • Cell Biology

Background:

  • Goblet cells produce the mucin layer of the tear film, essential for ocular surface health.
  • Previous studies suggested tear film alterations in Down's syndrome using the ferning test.
  • The specific ocular layer affected in Down's syndrome remained undetermined.

Purpose of the Study:

  • To quantify goblet cell number and distribution in the bulbar conjunctiva of individuals with Down's syndrome.
  • To compare goblet cell density between Down's syndrome patients and normal controls.
  • To investigate the link between goblet cell deficit and tear film abnormalities in Down's syndrome.

Main Methods:

  • Impression cytology was utilized to assess goblet cell presence.
  • The study included 30 participants: 15 with Down's syndrome and 15 healthy controls.

Related Experiment Videos

  • Goblet cell density was measured in the bulbar conjunctiva.

    • Main Results:

    • A significant reduction in goblet cells was observed in the Down's syndrome group (81.4 cells/mm²).
    • The control group exhibited a higher goblet cell density (209.8 cells/mm²).
    • This quantitative difference highlights a marked deficit in goblet cells in Down's syndrome.

    Conclusions:

    • The observed goblet cell deficit is a likely cause of tear film alterations in Down's syndrome.
    • Reduced mucin production may lead to dry spots and increased risk of anterior segment eye infections.
    • Altered conjunctival epithelium in Down's syndrome might stem from metabolic changes, potentially involving vitamin A, warranting further research.