http://www.ncri.org.uk/ncriconference/info/releases/pr5.pdf

Early Stage Drug Shows Promise
Against Cancer Cells from Young Patients

A NEW drug has shown promising pre-clinical activity
against cells from several types of children’s cancers,
scientists reveal at the National Cancer Research
Institute Conference in Birmingham today (Tuesday).
http://www.ncri.org.uk/ncriconference
Scientists from Cancer Research UK’s Paterson
Institute at the University of Manchester have shown
in laboratory tests that the drug RH1 can kill tumour
cells from neuroblastoma, osteosarcoma and Ewing’s
sarcoma, three types of childhood and adolescent cancer
that are often resistant to current types of chemotherapy.
Despite increases in survival rates for childhood cancers,
new drugs are needed to combat drug resistance seen in
current treatments. On the strength of these pre-clinical
results, the researchers are planning a phase 1 trial for
the drug involving children with cancer.
All cells have natural suicide mechanisms that become
active when cells are damaged or grow uncontrollably.
In cancer cells, this suicide mechanism switches off or
becomes faulty and treatment is needed to encourage
the process.
The researchers – based at the Paterson Institute for
Cancer Research Manchester ( http://www.mcrc.manchester.ac.uk
) and the Royal Manchester
Children’s Hospital ( http://www.cmmc.nhs.uk
) – found in their pre-clinical study
that even very low doses of RH1 could increase cancer
cell death by around 50 per cent when compared with
untreated cells.
RH1’s activity is greatly enhanced by an enzyme, DTdiaphorase
(DTD), which is found in higher quantities
in many adult tumours, including lung, liver and breast
cancers, and the drug has recently completed phase 1
studies in adults.
Dr Guy Makin, the study’s lead researcher from the
Paterson Institute ( http://www.paterson.man.ac.uk
) said: “We are very excited that we
have been able to work with a new drug that has only
just completed an adult phase 1 study. RH1 is a very
potent agent and our pre-clinical results suggest that
it could be effective against childhood tumours that
express DTD. We hope that this will be just the first
of many new agents that we can show are useful for
treating childhood cancer.”
The planned trial would be the first for a drug tested
for children through Cancer Research UK’s drug
development office.
Dr Bruce Morland, chairman of the Children’s Cancer and
Leukaemia Group (CCLG, http://www.ukccsg.org
), who were instrumental in the
selection of RH1 for evaluation, said: “Survival rates for
children with cancer are already high at 75 per cent. But
in many cases, patients become resistant to their drugs
and need new options.
“This is an exciting moment in the history of the CCLG.
Our increasingly close relationship with the Cancer
Research UK drug development office means new
potentially promising anticancer drugs can be tested in
children at a much earlier point in their development.
In this way we hope that new, effective drugs are
introduced in the fight against children’s cancer at
the earliest opportunity, saving even more lives in the
process.”
RH1 was synthesised from MeDZQ, an anti-tumour
chemical that selectively kills cancer cells. The RH1
compound was manufactured by scientists to be a watersoluble
version of MeDZQ, making it more effective as a
drug for potential clinical use.
Dr Sally Burtles, Cancer Research UK’s ( http://www.cancerresearchuk.org
) director of drug
development, said: “Helping more children survive
cancer by finding new treatments is a top priority for
the charity. Currently, not many drugs are developed
specifically for children so it’s great news that the drug is
showing such encouraging effects in preclinical studies.
We hope this type of drug development will continue
and help improve the treatment of childhood cancer
patients.”

How to contact the Manchester Cancer Research Centre:
Manchester Cancer Research Centre
The University of Manchester
Wilmslow Road
Withington
Manchester
M20 4BX
England
Tel: +44 0161 446 3156 (From the USA, 011-44-161-446-3156)
Fax: +44 0161 446 3109
email mcrc@manchester.ac.uk

Central Manchester and Manchester Children's University Hospitals NHS
Trust
Trust Headquarters, Cobbett House
Manchester Royal Infirmary
Oxford Road
Manchester
M13 9WL
Tel: +44 (0)161 276 1234 (From the USA, 011-44-161-276-1234
Fax: +44 (0)161 273 6211 (Trust HQ)