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Related Experiment Video

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T/Tn immunotherapy avoiding immune deviation.

Hye-Youn Son1, Vasso Apostolopoulos2, Chul-Woo Kim3

  • 1Tumor Immunity Medical Research Center, Cancer Research Institute, Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea.

International Journal of Immunopathology and Pharmacology
|October 21, 2016
PubMed
Summary
This summary is machine-generated.

This study explored cancer immunotherapy by developing a vaccine targeting Thomsen-Friedenreich (T/Tn) antigens. The oxidized mannan-conjugated T/Tn vaccine effectively inhibited tumor growth by balancing cellular and humoral immunity.

Keywords:
T/Tn cancer vaccineoxidized mannantumor immunotherapy

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Area of Science:

  • Immunology
  • Oncology
  • Vaccine Development

Background:

  • Tumor immunotherapy aims to induce cellular and humoral immune responses against cancer.
  • Immune deviation, where hyper-activated humoral immunity inactivates cell-mediated immunity, can hinder tumor growth inhibition.
  • The Thomsen-Friedenreich (T/Tn) antigen is a target for cancer immunotherapy.

Discussion:

  • This study investigated adjuvants to elicit T/Tn-specific humoral immunity while preventing immune deviation.
  • Immunization strategies included T/Tn antigen alone, with Freund's adjuvant (FA), or conjugated to keyhole limpet hemocyanin (KLH) or oxidized mannan (ox-M) with FA.
  • Anti-T/Tn antibodies were generated in groups receiving FA, KLH-T/Tn+FA, and ox-M-T/Tn+FA, with the highest levels in the KLH-T/Tn+FA group.

Key Insights:

  • Mice immunized with ox-M-T/Tn+FA demonstrated specific complement-dependent cytotoxicity.
  • The ox-M-T/Tn+FA vaccine conferred protection against T/Tn-positive mammary adenocarcinoma cell challenge.
  • Despite lower antibody levels than KLH-T/Tn+FA, ox-M-T/Tn+FA effectively inhibited tumor growth.

Outlook:

  • The oxidized mannan-conjugated T/Tn vaccine shows promise for cancer immunotherapy by promoting cellular immunity and moderating humoral responses.
  • This approach may offer a strategy to overcome immune deviation and enhance anti-tumor efficacy.
  • Further research could explore optimizing vaccine formulations for improved therapeutic outcomes in cancer treatment.