Navigation Links
UCLA researchers create 'fly paper' to capture circulating cancer cells
Date:11/18/2009

Just as fly paper captures insects, an innovative new device with nano-sized features developed by researchers at UCLA is able to grab cancer cells in the blood that have broken off from a tumor.

These cells, known as circulating tumor cells, or CTCs, can provide critical information for examining and diagnosing cancer metastasis, determining patient prognosis, and monitoring the effectiveness of therapies.

Metastasis the most common cause of cancer-related death in patients with solid tumors is caused by marauding tumor cells that leave the primary tumor site and ride in the bloodstream to set up colonies in other parts of the body.

The current gold standard for examining the disease status of tumors is an analysis of metastatic solid biopsy samples, but in the early stages of metastasis, it is often difficult to identify a biopsy site. By capturing CTCs, doctors can essentially perform a "liquid" biopsy, allowing for early detection and diagnosis, as well as improved treatment monitoring.

To date, several methods have been developed to track these cells, but the UCLA team's novel "fly paper" approach may be faster and cheaper than others and it appears to capture far more CTCs.

In a study published this month in the journal Angewandte Chemie, the UCLA team developed a 1-by-2-centimeter silicon chip that is covered with densely packed nanopillars and looks like a shag carpet. To test cell-capture performance, researchers incubated the nanopillar chip in a culture medium with breast cancer cells. As a control, they performed a parallel experiment with a cell-capture method that uses a chip with a flat surface. Both structures were coated with anti-EpCAM, an antibody protein that can help recognize and capture tumor cells. The researchers found that the cell-capture yields for the UCLA nanopillar chip were significantly higher; the device captured 45 to 65 percent of the cancer cells in the medium, compared with only 4 to 14 percent for the flat device.

"The nanopillar chip captured more than 10 times the amount of cells captured by the currently used flat structure," said lead study author Dr. Shutao Wang, a postdoctoral researcher at both the Crump Institute for Molecular Imaging at the David Geffen School of Medicine at UCLA and the California NanoSystems Institute at UCLA.

Wang noted that the nano-size scale and the unique surface topography of the UCLA nanopillar chip may help it interact with nano-size components on cellular surfaces in the blood, enhancing capture efficiency.

The time required for CTC detection using CellSearch, a technology currently approved by the U.S. Food and Drug Administration, is upwards of three to four hours, according to study author Dr. Hao Wang, a postdoctoral researcher at the Crump Institute and the California NanoSystems Institute at UCLA. The UCLA study found an optimal detection time of only two hours using nanopillar chips.

The nanopillar chip uses a common chamber slide, which fits into standard laboratory cell incubators. After the chip has been incubated and immunofluorescence-stained, an automated fluorescence microscope is used to identify and count the CTCs. The very simple device setting on the chamber slide allows multiple CTC detections to occur at the same time.

"We hope that this platform can provide a convenient and cost-efficient alternative to CTC sorting by using mostly standard lab equipment," said senior study author Dr. Hsian-Rong Tseng, associate professor of molecular and medical pharmacology at the Crump Institute and the California NanoSystems Institute.

The next step is more clinical research and possible studies with "break-away" cancer cells in patients' blood, as well as in other body fluids, such as urine and abdominal fluids, according to Tseng, who is also a researcher at UCLA's Jonsson Comprehensive Cancer Center.


'/>"/>

Contact: Rachel Champeau
rchampeau@mednet.ucla.edu
310-794-2270
University of California - Los Angeles
Source:Eurekalert  

Related medicine news :

1. Stanford researchers find culprit in aging muscles that heal poorly
2. UCLA researchers identify markers that may predict diabetes in still-healthy people
3. Mayo Clinic researchers discover new diagnostic test for detecting infection in prosthetic joints
4. Bipolar disorder relapses halved by Melbourne researchers
5. Cell that triggers symptoms in allergy attacks can also limit damage, Stanford researchers find
6. High and mighty: first common height gene identified by researchers behind obesity gene finding
7. Researchers estimate about 9 percent of US children age 8 to 15 meet criteria for having ADHD
8. Majority of 2.4 Million U.S. Children With ADHD Not Diagnosed or Consistently Treated, According to New Gold Standard Study by Cincinnati Childrens Researchers
9. Researchers develop long-lasting growth hormone
10. Jefferson immunology researchers halt lethal rabies infection in brain
11. Purdue researchers develop technology to detect cancer by scanning surface veins
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
UCLA researchers create 'fly paper' to capture circulating cancer cells
(Date:12/7/2016)... , ... December 07, 2016 , ... ... 2016 BOC Business Brilliance Awards under the Best New Product Launch category. Gensuite’s ... achieved through user experience. , BOC Global Events & Training Group is a ...
(Date:12/7/2016)... ... ... “The Road To Restoration”: an informative and enlightening book for those who ... of hands. “The Road To Restoration” is the creation of published author, Thomas Fitzhugh ... ring that you could reach out for, and grab, on the old carousels. ...
(Date:12/7/2016)... ... 2016 , ... “Fred Rides a Train” allows readers to tag along on ... Rides a Train” is the creation of published author, Janet Morrison, who has been ... Michigan. The "Fred, the Dog" series is her first attempt at writing for children. ...
(Date:12/7/2016)... ... December 07, 2016 , ... Dr. Greg ... the International Probiotic Association’s Washington DC workshop on November 2nd. The conference was ... dialog regarding probiotic dietary supplement regulations. , Dr. Leyer spoke about two ...
(Date:12/6/2016)... ... 06, 2016 , ... People with Parkinson’s disease and cognitive ... type of MRI, according to a study appearing online in the journal Radiology. ... characterized by tremors or trembling and stiffness in the limbs, impaired balance and ...
Breaking Medicine News(10 mins):
(Date:12/6/2016)...  Alopexx Oncology, LLC announced data from a Phase ... (immunocytokine) composed of interleukin-2 and a CD20-targeting monoclonal antibody. ... cells as Rituxan and maintains the activities of both ... in tumor targeting, engagement of the immune system, and ... the study (abstract #95954) were presented at the 58 ...
(Date:12/6/2016)... -- Radioisotopes are radioactive isotopes having an unstable balance ... nuclear research reactor or by using cyclotron. These isotopes ... gamma when changed to a stable nature. The gamma ... in medical diagnostics. In this field, the radiation is ... functioning. Radiotherapy is also used to treat some life-threatening ...
(Date:12/6/2016)... Homozygous Familial Hypercholesterolemia (HoFH) - ... Global Markets Direct,s latest Pharmaceutical and Healthcare ... – Pipeline Review, H2 2016, provides an ... (Metabolic Disorders) pipeline landscape. Homozygous familial ... caused due to mutation from both parents. ...
Breaking Medicine Technology: