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Methods to quantitate human haptoglobin by complexation with hemoglobin.

S Cerda1, S K Oh

  • 1Department of Microbiology, Boston University School of Medicine, MA 02118.

Journal of Immunological Methods
|November 6, 1990
PubMed
Summary
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A new enzyme-linked immunosorbent assay (ELISA) was developed to measure functional haptoglobin. This assay uses a monoclonal antibody to specifically quantify haptoglobin

Area of Science:

  • Biochemistry
  • Immunology
  • Analytical Chemistry

Background:

  • Haptoglobin (Hp) plays a crucial role in hemoglobin binding and iron metabolism.
  • Accurate quantification of functional haptoglobin is essential for diagnosing various medical conditions.
  • Existing methods for haptoglobin measurement may lack specificity or fail to detect functional capacity.

Purpose of the Study:

  • To develop and validate a direct sandwich ELISA for the specific quantification of native human haptoglobin.
  • To compare the efficacy of monoclonal antibodies versus polyclonal antisera in detecting haptoglobin-hemoglobin complexes.
  • To establish a reliable method for measuring functional haptoglobin capable of binding hemoglobin.

Main Methods:

  • Isolation of native human haptoglobin from plasma using affinity chromatography with chicken hemoglobin-Sepharose.

Related Experiment Videos

  • Development of a direct sandwich ELISA utilizing human hemoglobin as the capture agent.
  • Detection of functional haptoglobin by measuring the peroxidase activity of the formed complex.
  • Comparison of monoclonal antibody (clone 21.7) and polyclonal antisera reactivity.

    • Main Results:

    • A specific sandwich ELISA was successfully developed for haptoglobin quantification.
    • The assay effectively measures functional haptoglobin by detecting its ability to complex with hemoglobin.
    • Monoclonal antibody clone 21.7, targeting the alpha chain of haptoglobin, demonstrated high specificity and efficacy.

    Conclusions:

    • The developed direct sandwich ELISA provides a specific and sensitive method for quantifying functional haptoglobin.
    • This assay is valuable for clinical diagnostics and research involving haptoglobin-hemoglobin interactions.
    • The use of a specific monoclonal antibody ensures accurate measurement of native, functional haptoglobin.