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Related Experiment Videos

Lipoprotein distribution in sheep lung lymph.

C E Cross, T M Forte, R A Gunther

    The Journal of Laboratory and Clinical Medicine
    |April 1, 1983
    PubMed
    Summary

    Sheep lung lymph contains lipoproteins, including low-density lipoprotein (LDL) and high-density lipoprotein (HDL). Lung lymph HDL shows unique particle sizes, suggesting modifications within the lung

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    Area of Science:

    • Cardiovascular Science
    • Pulmonary Medicine
    • Lipid Metabolism

    Background:

    • Lymph composition reflects lung interstitial fluid.
    • Lipoprotein presence in lung interstitial space is understudied.
    • Long-term lymph fistulas are valuable research tools.

    Purpose of the Study:

    • Characterize lipoprotein distributions in sheep lung lymph and plasma.
    • Measure triglyceride and cholesterol concentrations in lymph and plasma.
    • Investigate potential modifications of lipoproteins within the lung.

    Main Methods:

    • Utilized unanesthetized sheep with long-term embedded instrumentation.
    • Collected and analyzed lung lymph, plasma, and thoracic duct lymph.
    • Employed analytical ultracentrifugation and electron microscopy.

    Main Results:

    • Sheep lung lymph contains LDL and HDL, albeit at lower concentrations than plasma.
    • Lung lymph HDL exhibits distinct particle sizes (135A and 97A) not found in plasma HDL (94A).
    • A fast-floating HDL component was identified in lung lymph but not plasma.

    Conclusions:

    • Major lipoprotein classes are present in sheep lung lymph.
    • HDL particles in lung lymph undergo physical modifications.
    • These modifications likely occur within the lung's endothelial barrier or interstitial fluid.

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