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Quantitative imaging reveals collagen changes in melanoma tumors during immunotherapy

New biomarkers of response in melanoma immunotherapy
Imaging during immunotherapy treatment reveals changes in collagen. Credit: Alexa R. Heaton, Nate J. Burkard, and Matt Stefely

Collagen, a major component of the extracellular matrix, plays a crucial role in tumor development. During the development of tumors ("tumorigenesis"), collagen fibers become linearized and densely deposited, hindering immune cell infiltration and promoting tumor metastasis. However, quantifying these collagen changes during melanoma progression has been challenging.

As reported in Biophotonics Discovery, researchers from the Morgridge Institute for Research and University of Wisconsin—Madison recently addressed this challenge by using quantitative imaging to visualize collagen in preclinical mouse melanoma models during immunotherapy. In their study, animals received a combination of curative radiation and immunotherapy; quantifying collagen morphology at both the image and single-fiber levels obtained insights into collagen remodeling over time.

In immunotherapy-treated mice, exhibited a healthier phenotype. These fibers were shorter, wider, and curlier, with modestly higher density.

The study found that single-fiber collagen features, calculated using CT-FIRE software, were more sensitive to treatment-induced changes than bulk collagen features. These single-fiber characteristics could serve as valuable biomarkers for assessing immunotherapy response.

Implications for cancer treatment

Understanding collagen dynamics during immunotherapy is crucial for improving treatment outcomes. The study's findings highlight the potential of quantitative imaging to enhance response in melanoma and other cancers. By identifying new biomarkers associated with collagen changes, researchers aim to optimize therapeutic strategies and personalize cancer treatments.

This research opens doors to novel approaches in cancer therapy, emphasizing the importance of collagen as a dynamic player in the . As scientists continue to unravel the complexities of collagen's role, patients may benefit from more effective and tailored treatments.

More information: Alexa R. Heaton et al, Quantifying in vivo collagen reorganization during immunotherapy in murine melanoma with second harmonic generation imaging, Biophotonics Discovery (2024). DOI: 10.1117/1.BIOS.1.1.015004

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Citation: Quantitative imaging reveals collagen changes in melanoma tumors during immunotherapy (2024, May 23) retrieved 16 June 2024 from https://medicalxpress.com/news/2024-05-quantitative-imaging-reveals-collagen-melanoma.html
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