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Garbarino F, Scelfo D, Paulone G, Paganelli A, Ulrici A, Magnoni C, Pasquali L. Comparative study of in-vitro autofluorescence of normal versus non-melanoma-skin-cancer cells at different excitation wavelengths. JOURNAL OF BIOPHOTONICS 2023; 16:e202200361. [PMID: 36645389 DOI: 10.1002/jbio.202200361] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 05/17/2023]
Abstract
In this experimental study the autofluorescence of squamous carcinoma cells, stimulated by 6 different excitation wavelengths in the range 280-533 nm, has been compared with the autofluorescence of normal control keratinocytes. Skin cells were cultivated in vitro, to isolate their characteristic autofluorescence form the more complex one that would be originated by the complete skin tissue. Autofluorescence spectra in the visible range were complemented by absorption measurements. It was observed that the control cells showed characteristic emission (and absorption) structures due to typical endogenous chromophores [FAD and NAD(P)H, lipo-pigments, porphyrins], that were severely dumped in pathological cells. The autofluorescence spectra were then elaborated by multivariate analysis: after a first exploratory data analysis by means of Principal Component Analysis, the whole dataset was used to develop classification models using partial least squares-discriminant analysis, to differentiate between normal and pathological cells. This permitted us to identify the most suitable fluorescence spectral interval, in the 550-670 nm range, to discriminate between normal and pathological behavior, independently on the excitation wavelength.
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Affiliation(s)
- Federico Garbarino
- Department of Dermatology, Surgical, Medical and Dental Department of Morphological Sciences Related to Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
- Clinical and Experimental Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Daniel Scelfo
- Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, Modena, Italy
| | - Gabriele Paulone
- Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, Modena, Italy
| | - Alessia Paganelli
- Department of Dermatology, Surgical, Medical and Dental Department of Morphological Sciences Related to Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
- Clinical and Experimental Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Alessandro Ulrici
- Department of Life Sciences, University of Modena and Reggio Emilia, Reggio Emilia, Italy
| | - Cristina Magnoni
- Department of Dermatology, Surgical, Medical and Dental Department of Morphological Sciences Related to Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Luca Pasquali
- Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, Modena, Italy
- IOM-CNR, Trieste, Italy
- Department of Physics, University of Johannesburg, Auckland Park, South Africa
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