Synchrotron-based FTIR spectra of stained single cells. Towards a clinical application in pathology.
Over the last few years, FTIR spectroscopy has become a potential analytical method in tissue and cell studies for cancer diagnosis. This has opened a way towards clinical applications such as a tool that would scan samples to assess the presence or absence of malignant cells in biopsies, or as an aid to help pathologists to better characterise those cells that are suspicious but not diagnostic for cancer. The latter application has the problem that in order to assess these cells pathologists would have already dealt with stained samples. Therefore, it is important to understand how staining would affect the spectra of cells. To this purpose, we have conducted this study in order to clarify, first, how haematoxylin and eosin (H&E) and Papanicolau (Pap) stainings affect the spectra of single cells and, second, whether FTIR spectroscopy could differentiate between stained lung cancer cells and their normal counterparts. Furthermore, different cell preparations (cytospin, and smear) used in cytological diagnosis were assessed. Experiments performed using a bright infrared (IR) source (synchrotron) showed that both H&E and Pap staining induced marked changes in the lipid and amide-II band regions. Despite this, FTIR spectroscopy of already stained cells is capable of differentiating between lung cancer cells and their normal counterparts. The clinical applications of this methodology are discussed.
Pijanka
Jacek
J
Institute for Science and Technology in Medicine, Guy Hilton Research Centre, Keele University, Stoke on Trent, UK.
Sockalingum
Ganesh D
GD
Kohler
Achim
A
Yang
Ying
Y
Draux
Florence
F
Parkes
Gary
G
Lam
Ka-Po
KP
Collins
Dave
D
Dumas
Paul
P
Sandt
Christophe
C
van Pittius
Daniel G
DG
Douce
Gill
G
Manfait
Michel
M
Untereiner
Valérie
V
Sulé-Suso
Josep
J
D000577:Amides / Q000737:chemistry; D002460:Cell Line; D045744:Cell Line, Tumor; D004801:Eosine Yellowish-(YS); D006416:Hematoxylin; D006801:Humans; D008055:Lipids / Q000737:chemistry; D008168:Lung / Q000737:chemistry / Q000166:cytology; D008175:Lung Neoplasms / Q000737:chemistry / Q000473:pathology; D010338:Pathology, Clinical / Q000379:methods*; D015203:Reproducibility of Results; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013194:Staining and Labeling / Q000379:methods*; D017356:Synchrotrons
D000577:Amides; D008055:Lipids; D004801:Eosine Yellowish-(YS); D006416:Hematoxylin