New Lung Cancer Study Takes Page from Google's Playbook Research uses mathematical probability model to predict how lung cancer spreads
SAN DIEGO The same sort of mathematical model used to predict which websites people are most apt to visit is now showing promise in helping map how lung cancer spreads in the human body, according to a new study published in the journal Cancer Research.
A team of researchers used an algorithm similar to the Google PageRank and to the Viterbi Algorithm for digital communication to gain important insights about the spread patterns of lung cancer. The team includes experts from the University of Southern California (USC), Scripps Clinic, The Scripps Research Institute, University of California, San Diego Moores Cancer Center and Memorial Sloan-Kettering in New York.
This research demonstrates how similar the Internet is to a living organism, said USC Viterbi School of Engineering Professor Paul Newton, Ph.D., the lead and corresponding author of the study. The same types of tools that help us understand the spread of information through the web can help us understand the spread of cancer through the human body.
Employing a sophisticated system of mathematical equations known as a Markov chain model, the research team guided by USC applied mathematicians found that metastatic lung cancer does not progress in a single direction from primary tumor site to distant locations, which has been the traditional medical view. Instead, they found that cancer cell movement around the body likely occurs in more than one direction at a time.
Researchers also learned that the first site to which the cells spread plays a key role in the progression of the disease. The study showed that some parts of the body serve as sponges that are relatively unlikely to further spread lung cancer cells to other areas of the body. The study identified other areas as spreaders for lung cancer cells.
The study revealed that for lung cancer, the main spreaders are the adrenal gland and kidney, whereas the main sponges are the regional lymph nodes, liver and bone.
The study applied the advanced math model to data from human autopsy reports of 163 lung cancer patients in the New England area, from 1914 to 1943. This time period was targeted because it predates the use of radiation and chemotherapy, providing researchers a clear view of how cancer progresses if left untreated. Among the 163 patients, researchers charted the advancement patterns of 619 different metastases to 27 distinct body sites.
The study's findings could potentially impact clinical care by helping guide physicians to targeted treatment options, designed to curtail the spread of lung cancer. For example, if the cancer is found to have moved to a known spreader location, imaging tests and interventions can be quickly considered for focused treatment before the cells may be more widely dispersed. Further study is needed in this area.
Keeping tabs on cancer's movement in the body is vital to patient care. While a primary cancer tumor (confined to a single location) is often not fatal, a patient's prognosis can worsen if the cancer metastasizes that is, flakes off and travels to other parts of the body to form new tumors.
The study is part of a relatively new movement to involve physical sciences in oncology research. Mathematics probability models that interpret data from specific patient populations offer a new alternative to the established approach of relying on broader clinical trends to predict where, and how fast, cancer will spread.
In addition to Newton, senior contributing authors include Jeremy Mason of the USC Viterbi School of Engineering; Kelly Bethel, M.D., of Scripps Clinic; Lyudmila Bazhenova, M.D., of the UC San Diego Moores Cancer Center; Jorge Nieva, M.D., of Billings Clinic; Larry Norton, M.D., of Memorial Sloan Kettering Cancer Center; and Peter Kuhn, Ph.D., of The Scripps Research Institute.
The study was conducted at the Scripps Physics Oncology Center (http://4db.us) and was funded by a grant U54CA143906 to Kuhn from the National Cancer Institute and the Gates Millennium Fellowship Program of the Bill and Melinda Gates Foundation.
Scripps Health provides comprehensive care at its five hospital campuses and its various outpatient facilities. With more than 300 affiliated physicians, Scripps Cancer Care seeks to provide the best possible treatment and cutting-edge research trials for patients by coordinating medical expertise in the areas of clinical cancer care, community outreach and clinical, translational and basic research.
About Scripps Health
Founded in 1924 by philanthropist Ellen Browning Scripps, Scripps Health is a $2.6 billion nonprofit integrated health system based in San Diego, Calif. Scripps Health treats a half-million patients annually through the dedication of 2,600 affiliated physicians and 13,500 employees among its five acute-care hospital campuses, home health care services, and an ambulatory care network of physician offices and 24 outpatient centers and clinics.
Recognized as a leader in the prevention, diagnosis, and treatment of disease, Scripps Health is also at the forefront of clinical research, genomic medicine, wireless health care and graduate medical education. With three highly respected graduate medical education programs, Scripps Health is a longstanding member of the Association of American Medical Colleges and is recognized by Truven Health Analytics (formerly Thomson Reuters) for having one of the top teaching hospitals in the nation. Scripps Health is also the region's only cardiovascular program recognized by U.S. News & World Report as one of the best in the country. Scripps Health has been consistently recognized by Fortune, Working Mother magazine and AARP as one of the best places in the nation to work. More in
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New Lung Cancer Study Takes Page from Google's Playbook Research uses mathematical probability model to predict how lung cancer spreads
