Navigation Links
Prototype test for predicting clinical outcome for melanoma patients
Date:8/14/2008

Investigators from the Melbourne Center of the international Ludwig Institute for Cancer Research (LICR) and Pacific Edge Biotchnology Ltd today reported that they have developed a test to predict whether a patient will progress rapidly from Stage III melanoma to metastatic Stage IV cancer and death.

More than 70% of patients with Stage III melanoma melanoma that has spread to the lymph nodes will typically have a rapid time to progression (TTP) to Stage IV melanoma, and pass away within five years of their diagnosis. However, the remaining <30% of patients will have a slow TTP to Stage IV and will have prolonged survival. Not being able to distinguish between these patient subtypes means that some patients might undergo aggressive, often toxic, treatments unnecessarily. The unpredictable and significant discrepancies in TTP and survival could also cloud the interpretation of results from clinical trials of new melanoma therapies.

The LICR Melbourne team, together with collaborators from Pacific Edge Biotechnology Limited in New Zealand, has developed a prototype test that can distinguish between these two patient subtypes with 85-90% accuracy. However, the team cautions that these findings must be validated in a larger number of patients before the test can be applied routinely as a prognostic tool.

According to the senior author of the study, LICR's Professor Jonathan Cebon, M.D., the predictive test could assist patients and their health care teams in making treatment decisions. Perhaps most importantly, being able to distinguish between the subtypes could have a tremendous impact on the development of new melanoma therapies. "One of the major problems we have in clinical trials for new melanoma therapies is that we can't identify the people who are going to have a slower disease progression no matter what they receive in a clinical trial," says Professor Cebon. "When new treatments are tested it is necessary to show clinical benefit by comparing patients who receive the new therapy with those who do not. Although patients might all have the same type of cancers, there can be big differences in their survival simply because their cancers behave differently - and this may have nothing to do with the treatment. If we are able to identify the good players and the bad players up-front, it becomes a whole lot easier figuring out whether good results are due to the new treatment or not. Most importantly far fewer patients would be needed for the clinical trials. It's partly because we can't clinically identify subtypes of patients that we have to do very large and very expensive trials. And, of course, this increases the time it takes to test the clinical benefit of potential new therapies."

The joint Australian/New Zealand team used microarrays to measure the expression of more than 30,000 genes in lymph node sections taken from 29 patients with Stage III melanoma. There were 2,140 genes differentially expressed in the sections from people who had already had a "poor" outcome (average TTP of just four months) and patients that had had a "good" outcome (average TTP of 40+ months). Using statistical analyses, the team identified 21 genes that could be used to differentiate between the two subtypes of patients in the retrospective analysis. This gene signature was then used to prospectively analyze another 10 patients, with the clinical outcome for nine of the 10 (90%) patients proving to be predicted accurately. The one patient who was incorrectly predicted to have a "good" prognosis did have a rapid TTP to Stage IV. However, this patient went on to have a prolonged survival of six years. The team also applied the test to published data sets and showed they could get a prediction accuracy of 85%, event though data was not available for all 21 genes in the published literature.

This study was conducted under the auspices of the Hilton Ludwig Cancer Metastasis Initiative. It was led by investigators from: LICR Melbourne Center Austin Health, Melbourne, Australia; Department of Biochemistry, University of Otago, Otago, New Zealand; Pacific Edge Biotechnology Limited, Dunedin, New Zealand, and; Department of Statistics, University of Auckland, Auckland, New Zealand.


'/>"/>
Contact: Sarah L. White
swhite@licr.org
917-379-0398
Ludwig Institute for Cancer Research
Source:Eurekalert

Related medicine news :

1. New Intervention for Adults with Autism Spectrum Disorder Prototype Completed by SIMmersion LLC
2. STMicroelectronics and Debiotech Announce First Prototypes of Disposable Insulin Nanopump
3. Shopko Announces New Prototype Store in Council Bluffs
4. Research highlights problems of predicting birthweights in obese mothers
5. Predicting post-traumatic stress disorders in deployed veterans
6. Predicting the future in ovarian cancer
7. Predicting survival after liver transplantation
8. Blood test takes step toward predicting Alzheimers risk, Stanford researchers find
9. Use of certain lipid measures not more effective in predicting coronary heart disease
10. Analysis of Six Clinical Trials Finds EPZICOM(R) Effective in Treatment-Naive HIV Patients With Both High and Low Baseline Viral Loads
11. Clinical Research Management gets contract for trials of therapeutics against infectious diseases
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 26, 2016 , ... Brent Kasmer, a legally blind and certified personal trainer is helping ... fitness app. The fitness app plans to fix the two major problems leading the fitness ... size fits all type program , They don’t eliminate all the reasons people ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the American Institutes ... Research Meeting June 26-28, 2016, at the Hynes Convention Center in Boston. , ... advance care planning, healthcare costs and patient and family engagement. , AIR researchers ...
(Date:6/25/2016)... Miami, FL (PRWEB) , ... June 25, 2016 , ... The temporary closing of Bruton ... Plant City Observer , brings up a new, often overlooked aspect of head lice: ... The closing for fumigation is not a common occurrence, but a necessary one in the ...
(Date:6/25/2016)... ... ... First Choice Emergency Room , the largest network of independent freestanding emergency ... its new Mesquite-Samuell Farm facility. , “We are pleased to announce Dr. Ogunleye ... M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. , Dr. Ogunleye ...
(Date:6/25/2016)... ... June 25, 2016 , ... ... non-athletes recover from injury. Recently, he has implemented orthobiologic procedures as a method ... —Johnson is one of the first doctors to perform the treatment. Orthobiologics are ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... FRANCISCO, Calif. , June 24, 2016 /PRNewswire/ ... ), a biopharmaceutical company developing novel therapeutics for ... unmet needs, today announced the closing of its ... of common stock, at the public offering price ... in the offering were offered by GBT. GBT ...
(Date:6/24/2016)... June 24, 2016 The Academy of Managed ... recommendations that would allow biopharmaceutical companies to more ... that make formulary and coverage decisions, a move that ... new medicines. The recommendations address restrictions in ... on the drug label, a prohibition that hinders decision ...
(Date:6/24/2016)... According to a new market ... Needles, Safety Pen Needles), Needle Length (4mm, 5mm, 6mm, ... of Purchase (Retail, Non-Retail) - Trends & Global Forecasts ... market for the forecast period of 2016 to 2021. ... by 2021 from USD 1.65 Billion in 2016, growing ...
Breaking Medicine Technology: