Development of human ex vivo bone-tumour niche for the study of cancer bone disease

This proposal will standardise and validate the use of a human ex vivo assay for the study of cancer-bone disease, thereby replacing mice as the first stage model for the study of cancer cell interactions within the skeleton, and providing a new system to assess novel drugs aimed at reducing cancer metastasis to and proliferation within bone, in addition to blocking tumour-induced osteolysis.
 
Uniform slices (0.5cm thick) of human bone from cores (0.5cm diameter, approx. 5 cm length) isolated from femoral heads removed during surgery will be cultured ex vivo. Human tumour cells (breast cancer, myeloma) will be seeded within each bone slice at a known density using either A) direct injection over 30 mins, followed by an overnight colonisation and transfer to experimental well plate; B) implantation as above followed by 1hr gentle agitation prior to overnight colonisation; C) immersion of bone slice in matrigel and implantation of tumour cells within bone/gel environment, followed by culture as in A. All cultures will be maintained for either 3, 7 or 10 days in aMEM (+1%BSA) as used previously and replenished every 3 days. Anti-cancer therapies previously tested within our group (bortezomib, zoledronate) will also be added to culture media in this assay and results compared to previous in vivo studies.

As with murine skeletal samples from tumour-bone disease models, bone from this assay will be assessed by microCT scanning and histomorphometric analysis to quantify bone volume and architecture, bone mineral density, tumour and bone cell distribution. In addition, media will be collected to assess the release of bone- (alkaline- and acid phosphatase) and tumour-derived factors (PTHrP, TGF-B, myeloma-specific IgG2bk) and correlated with measurements obtained using stored serum from mice from past experiments. Representative STANDARD slices from throughout the bone core will generate baseline data with SAMPLE slices cultured under experimental conditions.
 

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Pilot study grant

Status:

Closed

Principal investigator

Dr James Edwards

Institution

University of Oxford

Co-Investigator

Dr Claire Edwards

Grant reference number

NC/M000133/1

Award date:

Nov 2014 - Sep 2015

Grant amount

£74,131

Primary 'R'

Replacement

Scientific Discipline

Cells and systems
Cancer

Technologies/approach

Imaging
Tissue engineering

Keywords

In vitro