Corporate Banner
Satellite Banner
Biomolecular Screening
Scientific Community
 
Become a Member | Sign in
Home>News>This Article
  News
Return

Device Finds Stray Cancer Cells in Patients’ Blood

Published: Wednesday, April 10, 2013
Last Updated: Wednesday, April 10, 2013
Bookmark and Share
A microfluidic device that captures circulating tumor cells could give doctors a noninvasive way to diagnose and track cancers.

Doctors typically diagnose cancer via a biopsy, which can be invasive and expensive. A better way to diagnose the disease would be to detect telltale tumor cells floating in the bloodstream, but such a test has proved difficult to develop because stray cancer cells are rare, and it’s difficult to separate them from the mélange of cells in circulation.

Now researchers from Massachusetts General Hospital and Harvard Medical School say they’ve built a microfluidic device that can quickly grab nearly any type of tumor cell, an advance that may one day lead to simple blood tests for detecting or tracking cancer.

Similar, existing devices—including earlier versions developed by the authors of the study in Wednesday’s online issue of Science Translational Medicine—depend on tumor-specific biomarkers on the surface of the cells to pull them out of a blood sample, meaning that a given device won’t work for all cancer types. What’s more, the efficiency by which the tumor cells are purified from other cell types is generally low and time-consuming. In a given blood sample, circulating tumor cells are rare—there may be only one tumor cell for every billion cells.

The new device is a “substantial step forward from previous microfluidic devices,” says Peter Kuhn, a circulating-tumor-cell researcher at the Scripps Research Institute. Kuhn was not involved in the study. The device combines existing microfluidic techniques of cell sorting into a single device, he says. The result is that the tumor cells can be pulled out of a blood sample quicker, and without prior knowledge of their molecular characteristics.

Mehmet Toner, director of the BioMicroElectroMechanical Systems Resource Center at MGH, and colleagues report that their latest chip can isolate circulating-tumor cells in the blood, and could apply to all types of cancer. “For our earlier chip, you needed to know something on the surface of the tumor cells,” says Toner. In those devices, a small sample of blood would flow through microfluidic chambers, some of which contained an antibody that grabbed tumor cells. That system also took four to five hours to process a single blood sample. “But for early detection and to make this useful for virtually all cancers, we needed to increase the throughput and to make it [tumor-type] independent,” he says.

Identifying these wandering tumor cells could also help researchers study a cancer’s progression and help doctors track treatments or screen for new cases. By studying the surface proteins or genetic profiles of the cancer cells, doctors and researchers could learn which mutations are present in the cancer and perhaps tailor molecularly targeted treatments accordingly. The authors show that 15 tumor cells were recovered from a blood sample from a prostate cancer patient. The gene expression levels of each cell were studied individually and a mix of mutations was found.

The device developed by Toner’s group combines magnetic labeling of cells and microfluidic sorting to process a sample of blood in about an hour or two. To capture tumor cells regardless of their cancer type, the system first tags white blood cells with magnetic beads that are covered with antibodies that recognize proteins on the surface of the immune cells. The sample is then passed into microfluidic chambers that clear out red blood cells, plasma, and unused free magnetic beads based on their size. Then the device discards the tagged white blood cells using a magnetic field. “In the past, we were focused on tumor cells that we know very little about,” says Toner. “Here, we throw away the cells we know everything about, the blood cells,” he says.

The advantage of the new cell-sorting device over previous attempts is that it successfully brings together multiple technologies, such as size separation and magnetic-tag separation, already used in the field, says Gajus Worthington, president and CEO of Fluidigm, a California company that produces microfluidic devices for biomedical research. “The key thing here is the integration, which is crucial to anything related to single-cell work,” he says. All the steps in Toner’s device take place in similar volumes. “If you have to go from one microstep back to macrostep back to microstep, there are losses and complexity, which leads to noise,” says Worthington.

Toner notes that the Holy Grail for circulating-tumor-cell technology would be to diagnose patients early. “About 10 percent of cancer patients survive if they are diagnosed late, but almost 90 percent survive if they are diagnosed early,” says Toner. But whether or not these circulating tumor cells can be found in early-stage patients is not yet clear, says Luis Diaz, an oncologist at Johns Hopkins University School of Medicine. Diaz was not involved in the study. “Early-stage cancers might release very few cells into circulation,” he says. “That’s historically the problem with circulating tumor cells; you can only find them in advanced cancers.”


Further Information
Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 2,500+ scientific posters on ePosters
  • More than 3,800+ scientific videos on LabTube
  • 35 community eNewsletters


Sign In



Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into TechnologyNetworks.com you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Real-Time Data for Cancer Therapy
Biochemical sensor implanted at initial biopsy could allow doctors to better monitor and adjust cancer treatments.
Thursday, August 06, 2015
Bacterial Computing
The “friendly” bacteria inside our digestive systems are being given an upgrade, which may one day allow them to be programmed to detect and ultimately treat diseases such as colon cancer and immune disorders.
Monday, July 13, 2015
Researchers Identify New Target For Anti-Malaria Drugs
Manipulating the permeability of a type of vacuole could help defeat malarial parasites.
Thursday, May 14, 2015
New Way To Turn Genes On
Technique allows rapid, large-scale studies of gene function.
Thursday, December 11, 2014
Microscopic “Walkers” Find Their Way Across Cell Surfaces
Technology could provide a way to deliver probes or drugs to cell structures without outside guidance.
Thursday, October 23, 2014
Stress-Induced Hormone Primes Brain for PTSD
MIT study finds that ghrelin, produced during stressful situations, primes the brain for post-traumatic stress disorder.
Wednesday, October 16, 2013
New Approach to Global Health Challenges
MIT’s Institute for Medical Engineering and Science brings many tools to the quest for new disease treatments and diagnostic devices.
Friday, September 27, 2013
Microfluidic Platform Gives a Clear Look at a Crucial Step in Cancer Metastasis
A microfluidic platform provides a high-resolution view of a crucial step in cancer metastasis.
Friday, September 27, 2013
Watching Tumors Burst Through a Blood Vessel
A microfluidic platform provides a high-resolution view of a crucial step in cancer metastasis.
Tuesday, September 24, 2013
Researchers Reverse Fragile X Syndrome Symptoms in Adult Mice
Picower Institute neuroscientists use single dose of experimental drug; could prove promising for treatment of autism symptoms.
Tuesday, March 26, 2013
Chemists Find Help from Nature in Fighting Cancer
Study of several dozen compounds based on a fungal chemical shows potent anti-tumor activity.
Thursday, February 28, 2013
Bringing a New Perspective to Infectious Disease
Enlisted in the fight against HIV, MIT engineers and scientists contribute new technology, materials and computational studies.
Thursday, February 07, 2013
A Safer Way to Vaccinate
Polymer film that gradually releases DNA coding for viral proteins could offer a better alternative to traditional vaccines.
Monday, January 28, 2013
New Technology May Enable Earlier Cancer Diagnosis
Nanoparticles amplify tumor signals, making them much easier to detect in the urine.
Friday, December 21, 2012
Oscillating Microscopic Beads Could be Key to Biolab on a Chip
MIT team finds way to manipulate and measure magnetic particles without contact, potentially enabling multiple medical tests on a tiny device.
Tuesday, September 25, 2012
Scientific News
Promising Class of New Cancer Drugs Cause Memory Loss in Mice
New findings from The Rockefeller University suggest that the original version of BET inhibitors causes molecular changes in mouse neurons, and can lead to memory loss in mice that receive it.
Electrical Control of Cancer Cells
Research led by scientists at The University of Texas Health Science Center at Houston (UTHealth) has revealed a new electrical mechanism that can control these switches.
Signature of Microbiomes Linked to Schizophrenia
Studying microbiomes in throat may help identify causes and treatments of brain disorder.
Inflammation Linked to Colon Cancer Metastasis
A new Arizona State University research study led by Biodesign Institute executive director Raymond DuBois has identified for the first time the details of how inflammation triggers colon cancer cells to spread to other organs, or metastasize.
Structural Discoveries Could Aid in Better Drug Design
Scientists have uncovered the structural details of how some proteins interact to turn two different signals into a single integrated output.
Determining the Age of Fingerprints
Watch the imprint of a tire track in soft mud, and it will slowly blur, the ridges of the pattern gradually flowing into the valleys. Researchers have tested the theory that a similar effect could be used to give forensic scientists a way to date fingerprints.
Genetic Overlapping in Multiple Autoimmune Diseases May Suggest Common Therapies
CHOP genomics expert leads analysis of genetic architecture, with eye on repurposing existing drugs.
Surprising Mechanism Behind Antibiotic-Resistant Bacteria Uncovered
Now, scientists at TSRI have discovered that the important human pathogen Staphylococcus aureus, develops resistance to this drug by “switching on” a previously uncharacterized set of genes.
Tissue Bank Pays Dividends for Brain Cancer Research
Checking what’s in the bank – the Brisbane Breast Bank, that is – has paid dividends for UQ cancer researchers.
Researchers Publish Landmark “Basket Study”
Researchers from Memorial Sloan Kettering Cancer Center (MSK) have announced results from the first published basket study, a new form of clinical trial design that explores responses to drugs based on the specific mutations in patients’ tumors rather than where their cancer originated.
SELECTBIO

Skyscraper Banner
Go to LabTube
Go to eposters
 
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
2,500+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
3,800+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FREE!