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Report on fluorescence lifetime imaging using multiphoton laser scanning microscopy targeting sentinel lymph node diagnostics.

Journal article
Authors Jeemol James
Despoina Kantere
Jonas Enger
Ann-Marie Wennberg
Marica B Ericson
Published in Journal of biomedical optics
Volume 25
Issue 7
Pages 1-8
ISSN 1560-2281
Publication year 2020
Published at Institute of Clinical Sciences, Department of Dermatology and Venereology
Department of Chemistry and Molecular Biology
Department of Physics (GU)
Pages 1-8
Language en
Links dx.doi.org/10.1117/1.JBO.25.7.07120...
www.ncbi.nlm.nih.gov/entrez/query.f...
Keywords autofluorescence, fluorescence lifetime imaging, malignant melanoma, multiphoton microscopy, sentinel lymph node
Subject categories Medical technology, Spectroscopy, Biophysical chemistry, Optics

Abstract

Sentinel lymph node (SLN) biopsy is an important method for metastasis staging in, e.g., patients with malignant melanoma. Tools enabling prompt histopathological analysis are expected to facilitate diagnostics; optical technologies are explored for this purpose.The objective of this exploratory study was to investigate the potential of adopting multiphoton laser scanning microscopy (MPM) together with fluorescence lifetime analysis (FLIM) for the examination of lymph node (LN) tissue ex vivo.Five LN tissue samples (three metastasis positive and two negative) were acquired from a biobank comprising tissues from melanoma patients. Tissues were deparaffinized and subjected to MPM-FLIM using an experimental MPM set-up equipped with a time correlated single photon counting module enabling FLIM.The data confirm that morphological features similar to conventional histology were observed. In addition, FLIM analysis revealed elevated morphological contrast, particularly for discriminating between metastatic cells, lymphocytes, and erythrocytes.Taken together, the results from this investigation show promise for adopting MPM-FLIM in the context of SLN diagnostics and encourage further translational studies on fresh tissue samples.

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