Navigation Links
New computer model may aid personalized cancer care

BOSTON Dana-Farber Cancer Institute scientists have developed a mathematical model to predict how a patient's tumor is likely to behave and which of several possible treatments is most likely to be effective.

Reporting in the journal Cell Reports, researchers combined several types of data from pre- and post-treatment biopsies of breast tumors to obtain a molecular picture of how the cancer evolved as a result of chemotherapy.

"Better understanding of tumor evolution is key to improving the design of cancer therapies and for truly individualized cancer treatment," said Kornelia Polyak, MD, PhD, a breast cancer researcher in the Susan F. Smith Center for Women's Cancers at Dana-Farber. The model was developed by Polyak and Franziska Michor, PhD, a computational biologist at Dana-Farber.

The study analyzed breast cancer samples from 47 patients who underwent pre-operative chemotherapy to shrink the tumor so it could be removed more easily. The biopsy samples, representing the major types of breast cancer, included specimens taken at diagnosis and again after the chemotherapy was completed.

As has been increasingly recognized, a tumor contains a varied mix of cancer cells and the mix is constantly changing. This is known as tumor heterogeneity. The cells may have different sets of genes turned on and off phenotypic heterogeneity or have different numbers of genes and chromosomes genetic heterogeneity. These characteristics, and the location of different types of cells with the tumor, shape how the cancer evolves and are a factor in the patient's outcome.

In generating their predictive model, Polyak and Michor integrated data on the genetic and other traits of large numbers of individual cells within the tumor sample along with maps of where the cells were located within the tumors.

"We asked two questions how heterogeneity influences treatment outcomes and how treatment changes heterogeneity," said Polyak.

The computer model cranked out some general findings. For one, the genetic diversity within a tumor, such as differences in how many copies of a DNA segment are present didn't change much in cancers that had no response or only a partial response to treatment.

Another result: Tumors with less genetic diversity among their cells are more likely to completely respond to treatment than are tumors with more genetic complexity. "In general, high genetic diversity is not a good thing," commented Polyak. "The results show that higher diversity is making you less likely to respond to treatment."

While the genetic diversity of tumor cells was not strongly affected by chemotherapy in patients with partial or no response to treatment, the study revealed that certain types of cells those more likely to grow rapidly were more likely to be eliminated, and the locations of cell populations changed.

"Based on this knowledge," said Polyak, "we could predict which tumor cells will likely be eliminated or slowed down by treatment, and how this may change the tumor overall." She said this information might help design further treatment strategies for patients who didn't respond well to the initial therapy.

In the future, said the researchers, cancer doctors may use models of this type to analyze a patient's tumor at the time it's diagnosed; the results could help tailor specific drugs and plan treatment strategies matched to the tumor's predicted behavior.

First author of the report is Vanessa Almendro, PhD, of Dana-Farber/Brigham and Women's Cancer Center.


Contact: Robbin Ray
Dana-Farber Cancer Institute

Related medicine news :

1. Expert Project Manager Joins TERIS, a National Leader in eDiscovery, Information Governance, Computer Forensics and Relativity
2. Computer-controlled table could direct radiotherapy to tumours while sparing vital organs
3. Supercomputers help ORNL researchers identify key molecular switch that controls cell behavior
4. Computer model suggests genetic breast cancer screening may benefit those at intermediate risk
5. NSU’s Graduate School of Computer and Information Sciences to Offer Master of Science in Management Information Systems at Regional Campuses
6. HIV virus spread and evolution studied through computer modeling
7. NSU's Graduate School of Computer and Information Sciences to Host 2nd Annual ITPalooza
8. Forget Computers Releases Device Scout 3.0 for Robot Cloud — Manage All Apple Devices Smarter, Faster
9. SC&H Group Donates 84 Refurbished Laptop Computers to Children’s Guild and Arc Baltimore
10. Heated Mouse: Introducing ValueRays® Executive Series Heated Computer Mice
11. Apple IT Consulting Company, Forget Computers, the Developers of Robot Cloud, to Attend Upcoming MacTech Conference
Post Your Comments:
(Date:6/27/2016)... California (PRWEB) , ... June 27, 2016 , ... "FCPX ... fully customizable inside of Final Cut Pro X," said Christina Austin - CEO of ... unique style. Final Cut Pro X users can now reveal the media ...
(Date:6/27/2016)... ... June 27, 2016 , ... A revolution ... the emergency ambulance transport experience for the millions of people who require these ... disrupted the taxi industry through the use of technology. Now, SmartEMS has put ...
(Date:6/26/2016)... , ... June 26, 2016 , ... On June 10-11, ... of the 2016 Cereal Festival and World’s Longest Breakfast Table in Battle Creek, MI, ... the city’s history as home to some of the world’s leading providers of cereal ...
(Date:6/26/2016)... ... 26, 2016 , ... Brent Kasmer, a legally blind and certified personal trainer is helping to ... app. The fitness app plans to fix the two major problems leading the fitness industry ... fits all type program , They don’t eliminate all the reasons people quit ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... Austin residents ... the American College of Mohs Surgery and to Dr. Russell Peckham for medical and ... highly effective treatment for skin cancer. The selective fellowship in Mohs Micrographic Surgery completed ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... June 27, 2016 Jazz Pharmaceuticals plc (Nasdaq: ... under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as ... Celator Pharmaceuticals, Inc. ("Celator"; Nasdaq: CPXX ) ... Daylight Time). As previously announced on May ... definitive merger agreement under which Jazz Pharmaceuticals has commenced ...
(Date:6/24/2016)...  Collagen Matrix, Inc., ("Collagen Matrix") the driving ... collagen and mineral based medical devices for tissue ... Messer has joined the company as Vice ... growing portfolio of oral surgery, neurosurgery, orthopaedic and ... the Collagen Matrix executive team as an accomplished ...
(Date:6/24/2016)... -- Research and Markets has announced ... Applications, Technologies, Forecasts" report to their offering. ... Smart Skin, Structural Health Monitoring, Composite Smart Structures, ... involves electronic and/or electrical components and circuits that ... such as vehicle bodies or conformally placed upon ...
Breaking Medicine Technology: