Dataset Information

Sodium MRI with 3D-cones as a measure of tumour cellularity in high grade serous ovarian cancer.

ABSTRACT: The aim of this study was to assess the feasibility of rapid sodium MRI (23Na-MRI) for the imaging of peritoneal cancer deposits in high grade serous ovarian cancer (HGSOC) and to evaluate the relationship of 23Na-MRI with tumour cellularity. 23Na-MRI was performed at 3?T on twelve HGSOC patients using a 3D-cones acquisition technique. Tumour biopsies specimens were collected after imaging and cellularity was measured from histology. Total 23Na-MRI scan time for each patient was approximately 11?min. At an isotropic resolution of 5.6?mm, signal-to-noise ratios (SNRs) of 82.2 ± 15.3 and 15.1 ± 7.1 (mean?±?standard deviation) were achieved for imaging of tumour tissue sodium concentration (TSC) and intracellular weighted sodium concentration (IWS) respectively. Tumour TSC and IWS concentrations were: 56.8?±?19.1?mM and 30.8?±?9.2?mM respectively and skeletal muscle TSC and IWS concentrations were 33.2?±?16.3?mM and 20.5?±?9.9?mM respectively. There were significant sodium concentration differences between cancer and skeletal muscle, Wilcoxon signed-rank test, P?

SUBMITTER: Deen SS

PROVIDER: S-EPMC6477161 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Sodium MRI with 3D-cones as a measure of tumour cellularity in high grade serous ovarian cancer.

Deen Surrin S SS Riemer Frank F McLean Mary A MA Gill Andrew B AB Kaggie Joshua D JD Grist James T JT Crawford Robin R Latimer John J Baldwin Peter P Earl Helena M HM Parkinson Christine A CA Smith Sarah A SA Hodgkin Charlotte C Moore Elizabeth E Jimenez-Linan Mercedes M Brodie Cara R CR Addley Helen C HC Freeman Susan J SJ Moyle Penelope L PL Sala Evis E Graves Martin J MJ Brenton James D JD Gallagher Ferdia A FA

European journal of radiology open 20190419

The aim of this study was to assess the feasibility of rapid sodium MRI (23Na-MRI) for the imaging of peritoneal cancer deposits in high grade serous ovarian cancer (HGSOC) and to evaluate the relationship of 23Na-MRI with tumour cellularity. 23Na-MRI was performed at 3 T on twelve HGSOC patients using a 3D-cones acquisition technique. Tumour biopsies specimens were collected after imaging and cellularity was measured from histology. Total 23Na-MRI sca ...[more]

PMID: 31032385

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Project description:High-grade serous ovarian cancer (HGSC) disseminates early and extensively throughout the peritoneal space, causing multiple lesions that are a major clinical problem. The aim of this study was to investigate the cellular composition of peritoneal tumour deposits in patient biopsies and their evolution in mouse models using immunohistochemistry, intravital microscopy, confocal microscopy, and 3D modelling. Tumour deposits from the omentum of HGSC patients contained a prominent leukocyte infiltrate of CD3(+) T cells and CD68(+) macrophages, with occasional neutrophils. Alpha-smooth muscle actin(+) (α-SMA(+) ) pericytes and/or fibroblasts surrounded these well-vascularized tumour deposits. Using the murine bowel mesentery as an accessible mouse peritoneal tissue that could be easily imaged, and two different transplantable models, we found multiple microscopic tumour deposits after i.p. injection of malignant cells. Attachment to the peritoneal surface was rapid (6-48 h) with an extensive CD45(+) leukocyte infiltrate visible by 48 h. This infiltrate persisted until end point and in the syngeneic murine ID8 model, it primarily consisted of CD3(+) T lymphocytes and CD68(+) macrophages with α-SMA(+) cells also involved from the earliest stages. A majority of tumour deposits developed above existing mesenteric blood vessels, but in avascular spaces new blood vessels tracked towards the tumour deposits by 2-3 weeks in the IGROV-1 xenografts and 6 weeks in the ID8 syngeneic model; a vigorous convoluted blood supply was established by end point. Inhibition of tumour cell cytokine production by stable expression of shRNA to CXCR4 in IGROV-1 cells did not influence the attachment of cells to the mesentery but delayed neovascularization and reduced tumour deposit size. We conclude that the multiple peritoneal tumour deposits found in HGSC patients can be modelled in the mouse. The techniques described here may be useful for assessing treatments that target the disseminated stage of this disease.

Dataset Information

Sodium MRI with 3D-cones as a measure of tumour cellularity in high grade serous ovarian cancer.

Publications

Sodium MRI with 3D-cones as a measure of tumour cellularity in high grade serous ovarian cancer.

Similar Datasets

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