PET-based immunomapping of intratumoral CD4+ cells to monitor acquired resistance to checkpoint inhibitors

Stefania Pezzana
Eberhard Karls Universität Tübingen
June 27, 2025
Sci Adv
https://pubmed.ncbi.nlm.nih.gov/40561008/

This article is currently being updated. View its version on PubMed.

https://pubmed.ncbi.nlm.nih.gov/40561008/

Research summary

This study establishes a PET imaging approach using ⁶⁴Cu-labeled CD4-specific nanobody (⁶⁴Cu-CD4-Nb1) to visualize CD4⁺ T cell distribution in tumors. In vivo imaging in humanized mice predicted responses or early resistance to immune checkpoint therapy.

Key outcome of the study

⁶⁴Cu-CD4-Nb1 PET imaging accurately measures spatial dynamics of CD4⁺ T cells, identifies early resistance, and predicts efficacy of checkpoint inhibitor therapies.

Model

Humanized CD4 Knockin (hCD4-KI) mouse model developed by genOway, enabling in vivo imaging of human CD4⁺ T cells with nanobody PET tracers.

TARGET:
CD4
T4 antigen, Leu-3, L3T4

Keywords

Cancer immunotherapy, PET imaging, CD4⁺ T cell tracking, Resistance prediction, Immune response assessment

Technical specifications

Humanized Knockin, CD4, PET imaging, Nanobody-based targeting, Immunotherapy monitoring

Related products

Catalogue product

genO‑hCD4

The humanized genO‑hCD4 mouse model allows in vivo efficacy and safety assessment of anti-human CD4 compounds.

Customized product

No items found.