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Related Concept Videos

Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Related Experiment Video

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Isolation and Flow Cytometric Analysis of Glioma-infiltrating Peripheral Blood Mononuclear Cells
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Mapping T cell infiltration patterns in glioma tumor tissue.

Tiffaney Hsia1, Ana K Escobedo1, Syeda Maheen Batool1

  • 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA.

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Summary

Characterizing T cell receptor (TCR) repertoires in glioma subtypes reveals unique signatures that influence patient survival and may serve as biomarkers for immunotherapeutics. This study maps the TCR landscape to identify prognostic antigens and viral associations.

Keywords:
AstrocytomaGlioblastoma, GBMMalignant glial tumorsT cell receptor, TCRTumor infiltrating lymphocytes, TIL

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Area of Science:

  • Neuro-oncology
  • Immunology
  • Genomics

Background:

  • The glioma immune repertoire is crucial for developing immunotherapeutics and identifying prognostic/diagnostic biomarkers.
  • Understanding T cell receptor (TCR) landscapes in gliomas is vital for advancing cancer treatment strategies.

Purpose of the Study:

  • To characterize the T cell receptor (TCR) repertoire in distinct glioma subtypes.
  • To investigate the relationship between TCR repertoire features, patient survival, and potential biomarkers.

Main Methods:

  • Targeted immune repertoire sequencing of tumor-infiltrating lymphocytes (TIL) from four glioma subtypes (astrocytomas II/III, astrocytomas IV, glioblastomas, oligodendrogliomas).
  • Stratification of gliomas based on WHO classification for TCR landscape mapping.
  • Analysis of TCR repertoire diversity, clonotype sharing, conservation, and CDR3 binding regions.

Main Results:

  • Significant influence of TCR diversity on patient survival was observed.
  • Unique TCR repertoire signatures were identified for different glioma subtypes.
  • Mapping of CDR3 binding regions revealed prognostic biomarkers, including sequences associated with viral signatures (cytomegalovirus, Epstein-Barr virus) and tumor-derived proteins.

Conclusions:

  • Characterizing TCR repertoires is essential for understanding the patient's clinical condition in glioma.
  • Unique repertoire signatures and correlated antigens can facilitate patient outcome prognostication.
  • These findings provide a foundation for developing novel immunotherapeutic applications for glioma.