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2017 ; 7
(1
): 11424
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Diffusion kurtosis imaging evaluating epithelial-mesenchymal transition in
colorectal carcinoma xenografts model: a preliminary study
#MMPMID28900220
Liu H
; Shen W
; Zhang C
; Cui Y
; Li J
; Zhang T
; Chen W
; Wang D
Sci Rep
2017[Sep]; 7
(1
): 11424
PMID28900220
show ga
Epithelial-mesenchymal transition (EMT) plays an important role in aggravating
invasiveness and metastatic behavior of colorectal cancer (CRC). Identification
of EMT is important for structuring treatment strategy, but has not yet been
studied by using noninvasive imaging modality. Diffusion kurtosis imaging (DKI)
is an advanced diffusion weighted model that could reflect tissue microstructural
changes in vivo. In this study, EMT was induced in CRC cells (HCT116) by
overexpressing Snail1 gene. We aimed to investigate the value of DKI in
identifying EMT in CRC and decipher the correlations between DKI-derived
parameters and EMT biomarker E-cadherin and cell proliferative index Ki-67
expression. Our results revealed that HCT116/Snail1 cells presented changes
consistent with EMT resulting in significant increase in migration and invasion
capacities. DKI could identify CRC with EMT, in which the DKI-derived parameter
diffusivity was significantly lower, and kurtosis was significantly higher than
those in the CRC/Control. Diffusivity was negatively and kurtosis was positively
correlated with Ki-67 expression, whereas diffusivity was positively and kurtosis
was negatively correlated with E-cadherin expression. Therefore, our study
concluded that DKI can identify EMT in CRC xenograft tumors. EMT-contained CRC
tumors with high Ki-67 and low E-cadherin expression were vulnerable to have
lower diffusivity and higher kurtosis coefficients.
|*Diffusion Magnetic Resonance Imaging/methods
[MESH]