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Updated: Feb 13, 2026

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Does the B7-H3 Immune Checkpoint Have High Potential as a Therapeutic Target?

Marco Agostini1, Pietro Traldi1, Mahmoud Hamdan1

  • 1Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35100 Padova, Italy.

Cells
|February 12, 2026
PubMed
Summary

B7-H3 (CD276) shows promise as a cancer immunotherapy target due to its differential expression in tumors. However, its therapeutic efficacy requires deeper biological understanding beyond expression levels for effective immune therapeutics.

Keywords:
B7-3H immune checkpointimmune cell inhibitors (ICIs)immune-related adverse eventsmass spectrometry-based proteomics

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Area of Science:

  • Oncology
  • Immunology
  • Molecular Biology

Background:

  • B7-H3 (CD276) is a B7 family protein implicated in cancer progression, with elevated expression in tumor cells and the tumor microenvironment.
  • Immune checkpoint inhibitors (ICIs) have revolutionized cancer therapy but benefit only a subset of patients and can cause immune-related adverse events (irAEs).
  • Differential protein expression in diseased versus healthy tissues is crucial but not sufficient as a sole predictive biomarker for therapeutic targeting.

Purpose of the Study:

  • To investigate why B7-H3 is considered a promising therapeutic target for novel immune therapeutics.
  • To analyze clinical trial data and biological insights regarding B7-H3's role in cancer.
  • To highlight the contribution of proteomics in understanding B7-H3's therapeutic potential.

Main Methods:

  • Review of existing clinical trial data concerning B7-H3 expression and therapeutic outcomes.
  • Analysis of the biological role and signaling pathways associated with B7-H3.
  • Consideration of mass spectrometry-based proteomics findings.

Main Results:

  • B7-H3 exhibits differential expression in various cancers, making it an attractive target.
  • Clinical trials suggest potential for B7-H3-targeted therapies, but efficacy and patient subsets require further definition.
  • Understanding B7-H3's complex biology and interactions is key to overcoming ICI limitations.

Conclusions:

  • B7-H3 represents a promising avenue for developing next-generation cancer immunotherapies.
  • Integrating expression data with detailed biological pathway analysis is essential for successful therapeutic strategies.
  • Proteomics plays a vital role in elucidating B7-H3's function and therapeutic applicability.