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Home Science News Cancer

New biomarkers of response in melanoma immunotherapy

May 23, 2024
in Cancer
Reading Time: 2 mins read
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Imaging during immunotherapy treatment reveals changes in collagen.
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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.

Imaging during immunotherapy treatment reveals changes in collagen.

Credit: Alexa R. Heaton acquired the collagen images; Alexa R. Heaton, Nate J. Burkard, and Matt Stefely designed and executed the figure graphics.

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.

In-vivo imaging of collagen

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.

Sensitive biomarkers: Single-fiber collagen features

In immunotherapy-treated mice, collagen fibers 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 immunotherapy 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 groundbreaking research opens doors to novel approaches in cancer therapy, emphasizing the importance of collagen as a dynamic player in the tumor microenvironment. As scientists continue to unravel the complexities of collagen’s role, patients may benefit from more effective and tailored treatments.

For details, see the Gold Open Access article by A. R. Heaton et al., “Quantifying in vivo collagen reorganization during immunotherapy in murine melanoma with second harmonic generation imaging,” Biophoton. Discovery 1(1), 015004 (2024) doi 10.1117/1.BIOS.1.1.015004.



Journal

Biophotonics Discovery

DOI

10.1117/1.BIOS.1.1.015004

Article Title

Quantifying in vivo collagen reorganization during immunotherapy in murine melanoma with second harmonic generation imaging

Article Publication Date

20-May-2024

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