Volume 14, Issue 8 e202100007
RESEARCH ARTICLE

Feasibility of dual-contrast fluorescence imaging of pathological breast tissues

Androniki Mitrou

Androniki Mitrou

Advanced Biophotonics Laboratory, University of Massachusetts Lowell, Lowell, Massachusetts, USA

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Xin Feng

Xin Feng

Advanced Biophotonics Laboratory, University of Massachusetts Lowell, Lowell, Massachusetts, USA

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Ashraf Khan

Ashraf Khan

Department of Pathology, University of Massachusetts Medical School-Baystate, Springfield, Massachusetts, USA

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Anna N. Yaroslavsky

Corresponding Author

Anna N. Yaroslavsky

Advanced Biophotonics Laboratory, University of Massachusetts Lowell, Lowell, Massachusetts, USA

Correspondence

Anna N. Yaroslavsky, Advanced Biophotonics Laboratory, University of Massachusetts Lowell, Lowell, MA, USA.

Email: [email protected]

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First published: 19 May 2021
Citations: 1

Androniki Mitrou and Xin Feng contributed equally to this study.

Abstract

The combination of intravital dye, methylene blue (MB), with molecular cancer marker, pH low insertion peptide (pHLIP) conjugated with fluorescent Alexa532 (Alexa532-pHLIP), was evaluated for enhancing contrast of pathological breast tissue ex vivo. Fresh, thick breast specimens were stained sequentially with Alexa532-pHLIP and aqueous MB and imaged using dual-channel fluorescence microscopy. MB and Alexa532-pHLIP accumulated in the nuclei and cytoplasm of cancer cells, respectively. MB also stained nuclei of normal cells. Some Alexa532-pHLIP fluorescence emission was detected from connective tissue and benign cell membranes. Overall, Alexa532-pHLIP showed high affinity to cancer, while MB highlighted tissue morphology. The results indicate that MB and Alexa532-pHLIP provide complementary information and show promise for the detection of breast cancer.image

CONFLICTS OF INTEREST

The authors declare no potential conflict of interest.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available upon request.

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