Probing the glioma micro-environment: Analysis using biopsy in combination with ultra-fast cyclic immunolabeling

Area of Science:

• Neuro-oncology
• Immunology
• Translational Medicine

Background:

• The glioma-immune system interaction is poorly understood, impeding effective immunotherapy development.
• Tumor-induced immune responses are dynamic and influenced by treatments like surgery, radiation, and chemotherapy.
• Assessing these local immune changes is challenging due to tumor inaccessibility and invasive sampling methods.

Purpose of the Study:

• To establish a novel mouse model for repeated, minimally invasive sampling of intracranial tumors.
• To longitudinally investigate dynamic immunological changes within gliomas over time and in response to therapy.
• To enable detailed analysis of the tumor microenvironment's immune landscape in individual animals.

Main Methods:

• Development of a fine needle biopsy technique for safe, repeated cell collection from murine intracranial tumors.
• Application of ultra-fast cycling (FAST) technology for multi-cycle immunofluorescence staining of retrieved cells.
• Integration of repeat-biopsy and FAST immunofluorescence for longitudinal immune profiling.

Main Results:

• Demonstrated the feasibility of safely and repeatedly collecting viable cells from intracranial tumors via fine needle biopsy.
• Utilized FAST immunofluorescence to analyze cellular immune changes over time within the same animal.
• Provided insights into the dynamic immune response during glioma development and potentially in response to treatment.

Conclusions:

• The developed repeat-biopsy model combined with FAST immunofluorescence is a powerful tool for studying glioma immunology.
• This approach overcomes limitations of single-time-point sampling, allowing detailed longitudinal analysis of the immune response.
• The methodology can be applied to gliomas and other intracranial diseases to advance understanding and therapeutic strategies.