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Proteomic analysis of lymph.

Lee V Leak1, Lance A Liotta, Henry Krutzsch

  • 1Clinical Proteomics Program of Therapeutic Proteins, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, MD 20892, USA.

Proteomics
|March 5, 2004
PubMed
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This study reveals that ovine lymph contains unique proteins, differing from blood plasma. Proteomic analysis identified specific lymph proteins, highlighting lymph

Area of Science:

  • Proteomics
  • Animal Science
  • Biochemistry

Background:

  • Lymph is traditionally viewed as an ultrafiltrate of blood plasma.
  • Understanding the lymph proteome is crucial for comprehending its physiological roles.
  • Previous analyses have not fully characterized the protein composition of normal ovine lymph.

Purpose of the Study:

  • To conduct the first proteomic analysis of normal ovine lymph.
  • To identify and differentiate proteins present in ovine lymph compared to blood plasma.
  • To characterize the lymph proteome using advanced mass spectrometry techniques.

Main Methods:

  • Utilized surface-enhanced laser desorption/ionization-time of flight-mass spectrometry (SELDI-TOF-MS) with weak cation exchange chips.
  • Employed two-dimensional gel electrophoresis (2-D PAGE) for protein separation.

Related Experiment Videos

  • Conducted tandem mass spectrometry (MS/MS) for protein identification against a comprehensive database.

    • Main Results:

    • SELDI-TOF-MS identified three protein peaks exclusive to lymph and five exclusive to plasma, with eight common peaks.
    • 2-D PAGE confirmed higher ion presence in plasma than lymph.
    • MS/MS identified 18 proteins in ovine lymph, including albumin, fibrinogen, immunoglobulin G (IgG), and serotransferrin. Glial fibrillary astrocyte acidic protein and neutrophil cytosol factor-1 were differentially expressed.

    Conclusions:

    • Ovine lymph possesses a distinct proteome, differing quantitatively and qualitatively from blood plasma.
    • Proteomic technologies enable the detection of differentially expressed proteins in lymph.
    • This study establishes lymph as more than a simple ultrafiltrate of plasma.