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Peptide-Loaded HLA Class I Tetramer-Associated Magnetic Bead-Based Enrichment of HBV-Specific CD8+ T Cells

Kathrin Heim1, Maike Hofmann1, Robert Thimme2

  • 1Department of Medicine II, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|July 23, 2024
PubMed

Insights

Detecting low-frequency HBV-specific CD8+ T cells in chronic infections is challenging. Magnetic bead enrichment using peptide-loaded HLA tetramers enhances detection sensitivity for these crucial immune cells.

Area of Science:

  • Immunology
  • Virology
  • Cellular Biology

Background:

  • Chronic Hepatitis B Virus (HBV) infection is characterized by a low frequency of HBV-specific CD8+ T cells.
  • Conventional ex vivo staining methods often fail to detect these rare cells due to low sensitivity.

Purpose of the Study:

  • To improve the detection sensitivity of HBV-specific CD8+ T cells in chronic HBV infection.
  • To present a method for enriching virus-specific CD8+ T cells for downstream applications.

Main Methods:

  • Staining of cells with peptide-loaded HLA class I tetramers.
  • Magnetic bead-based enrichment of stained cells.
  • Evaluation of enrichment for downstream applications like single-cell RNA sequencing.

Main Results:

  • Peptide-loaded HLA class I tetramer staining combined with magnetic bead enrichment significantly increases detection sensitivity for HBV-specific CD8+ T cells.
  • This enrichment strategy is effective for increasing the frequency of target cells.

Conclusions:

  • Magnetic bead-based enrichment is a suitable and effective method for detecting low-frequency HBV-specific CD8+ T cells.
  • This approach facilitates downstream analyses, including single-cell RNA sequencing, of virus-specific CD8+ T cells in chronic infections.

Keywords:
Enrichment strategyHBVHLA class IPeptide-loaded HLA class I tetramersVirus-specific CD8+ T cells

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