February 14, 2012 2 Comments
Some of you may have read the January report from the American Cancer Society (ACS) that described a decline in U.S. cancer death rates by 1.8 percent per year in men and 1.6 percent per year in women during the period between 2004 to 2008.
These encouraging results have been touted as evidence of success in the war on cancer. The war on cancer itself began in December 1971, when then president Richard Nixon established a national priority to conquer this disease. Since that time, we have dedicated more than $200,000,000,000 to this effort and published literally millions of articles on the topic. Despite these efforts and tremendous resource allocations, the focus of this research effort, i.e. treatment of advanced malignancies, has provided limited successes.
If we drill down onto the ACS statistics we find that most of the survival changes reflect earlier detection and the successful application of cancer screening. Mammograms, colonoscopies, the use of PSA and the growing application of screening CT scans for lung cancer detection have, and will continue to have, a favorable impact on cancer statistics.
This is the good news. The bad news is that our success in treating advanced disease is almost non-existent. While there have been slow migrations in a favorable direction for the five-year survival rates in some malignancies, the big killers like lung and GI, have shown extremely limited progress. There are many reasons why cancer cures remain out of reach, but several changes could be implemented immediately to increase our rate of success.
First, we need to incorporate systems biology into cancer research. As opposed to analyte-based approaches like genomics that unravel one finding at a time, the field of biosystematics examines human cancer through the lens of interacting networks.
Second, we need to redouble our efforts in the study of basic metabolism and the growing field of metabolomics.
Third, we need to revamp the clinical trial process. Were investigators incentivized to achieve greater clinical successes, there were be fewer failed Phase II and Phase III trials. Contrary to the business world where success is rewarded, academic physicians today receive the same compensation for every patient treated, whether the intervention is successful or not. This has the unintended consequence of encouraging physicians to accrue patients to clinical trials with no focus on effective therapies. While it may be gratifying to the trialists to have successes, they receive the same compensation for their failures. Clinical investigators need skin in the game.
Finally, the regulatory environment is currently over-restrictive. The process should allow investigator-initiated efforts with more lenient review processes. The current environment that punishes dedicated physicians for stepping out of the established guideline therapies is thwarting progress and frightening dedicated investigators out of the field. Good faith efforts on the part of physicians using new drugs and combinations that document successes and failures, could unleash an army of clever physicians to utilize novel approaches to advance new therapies with little additional cost.
Lethal diseases, like advanced cancer, pose hurdles that require novel trial designs and less stringent controls. Patients confronting these illnesses should be allowed to receive therapies and should be granted the dignity to determine their own risk-benefit ratios when they confront life and death decisions. Simple consent forms could make available effective treatments while pharmaceutical corporations should be encouraged to provide drugs under the auspices of these patient-driven developmental trials.
While we applaud the discoveries of our colleagues in the field of genomics, and their analyte-driven platforms, we forget at our peril that medicine and most of its discoveries have been observational.