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Related Experiment Video

Updated: Nov 9, 2025

A Precision Medicine Tool for Measurement and Monitoring of Hemoglobin S in Sickle Cell Disease Patients Receiving Transfusion Therapy
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[Haptoglobin as a biomarker].

S N Naryzhny1, O K Legina2

  • 1Institute of Biomedical Chemistry, Moscow, Russia; Petersburg Institute of Nuclear Physics B.P. Konstantinova National Research Center "Kurchatov Institute", Gatchina, Russia.

Biomeditsinskaia Khimiia
|April 16, 2021
PubMed
Summary

Haptoglobin (Hp), a blood glycoprotein, binds hemoglobin and protects tissues. Its variations and modifications are being studied as potential biomarkers for diseases, including cancer.

Keywords:
biomarkerhaptoglobin

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Clinical Chemistry

Background:

  • Haptoglobin (Hp) is a vital plasma glycoprotein involved in hemoglobin binding, tissue protection, and preventing oxidative damage.
  • As an acute phase protein, Hp levels fluctuate with disease, making its measurement a standard clinical practice.
  • Hp's unique polymorphic gene in humans leads to distinct phenotypes (Hp1-1, Hp2-2, Hp2-1), influencing disease predisposition.

Purpose of the Study:

  • To review the structural and functional diversity of haptoglobin (Hp).
  • To explore the potential of Hp and its modifications as biomarkers for various pathologies, particularly malignant neoplasms.

Main Methods:

  • Review of existing literature on haptoglobin structure, function, and genetics.
  • Analysis of post-translational modifications (PTMs) of Hp, focusing on glycosylation.
  • Investigation of Hp's role in disease, especially cancer, through PTM and proteoform analysis.

Main Results:

  • Haptoglobin exhibits significant structural and functional diversity due to genetic polymorphism and extensive post-translational modifications (PTMs).
  • Glycosylation of the Hp β-chain is a critical PTM influencing its structure and function, with altered patterns observed in pathological conditions.
  • The study of Hp proteoforms and modified oligosaccharides is a key area for understanding disease mechanisms, especially in malignant neoplasms.

Conclusions:

  • Haptoglobin's diverse proteoforms, arising from genetic and post-translational variations, suggest differential functions.
  • Modified haptoglobin structures, particularly glycosylation patterns, hold significant promise as biomarkers for early disease detection and monitoring.
  • Further research into Hp's structural heterogeneity is crucial for its application in clinical diagnostics and understanding disease pathogenesis.