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Changes in chick corneal lipids during development.

D A Rintoul, R D Creed, G W Conrad

    Investigative Ophthalmology & Visual Science
    |October 1, 1984
    PubMed
    Summary
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    Embryonic chick corneas show dynamic changes in gangliosides, particularly those rich in sialic acid, during development. Phosphatidylserine levels may indicate corneal innervation.

    Area of Science:

    • Developmental Biology
    • Neuroscience
    • Biochemistry

    Background:

    • Corneal development involves complex biochemical changes.
    • Lipid composition, including phospholipids and glycolipids, plays a crucial role in tissue development and function.

    Purpose of the Study:

    • To analyze phospholipid and glycolipid content in embryonic chick corneas.
    • To investigate changes in specific lipid classes, such as phosphatidylserine and gangliosides, during development.
    • To explore the relationship between lipid profiles and corneal innervation.

    Main Methods:

    • Chromatographic techniques were employed to analyze lipid content.
    • Phospholipid and glycolipid classes were quantified in chick corneas from embryonic days 9 to 18.

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    Main Results:

    • Phospholipid headgroup classes showed minimal change, except for a rise in phosphatidylserine from 12% to 18%.
    • Glycolipid content varied, with a peak sphingolipid/phospholipid ratio at day 14.
    • Highly sialylated gangliosides appeared at days 14-15 and then diminished by day 18.

    Conclusions:

    • Gangliosides with high sialic acid content exhibit stage-specific developmental patterns in the chick cornea.
    • The observed increase in phosphatidylserine may serve as a biochemical indicator of corneal innervation.