Navigation Links
Berkeley researchers lay groundwork for cell version of DNA chip

rough the adaptation of a technique, developed earlier by Bertozzi and her research group, called the "Staudinger ligation." Bertozzi's Staudinger ligation utilizes the sugar complexes called "oligosaccharides" that reside on the surface of every cell, and a reaction between two types of molecules, a nitrogen-containing azide, and a phosphorous-containing phosphine, as a means of attaching probes and reagents to cell surfaces, or to link different molecules inside of the cells.

"The Staudinger ligation has been shown to be both cell friendly and precise, so we exploited the reaction to very specifically link a DNA molecule to the surface of a living cell," said Chandra. "DNA is not normally found on the surfaces of cells, so the ability to deliver the DNA strands, keep them there, and use them for a productive purpose is a significant advance."

Chandra, working under the direction of Francis and Bertozzi, used the Staudinger ligation to create a phosphine-DNA conjugate that makes it possible for the DNA to adhere to a cell's surface. The phosphine-DNA conjugate provides an outer layer of adhesion that is independent of the cell's natural stickiness. As a bonus, the researchers are even able to bind their phosphine-DNA conjugates to cells that are not naturally sticky, providing the first known method for attaching non-adherent cell types to other surfaces. This could prove to be a real advantage.

"For example, it should be possible to array multiple types of non-adherent cells on a chip to create a mini-immune system for evaluating potential therapies," said Chandra.

To test the ability of their phosphine-DNA conjugates to bind to cells, Chandra and his colleagues conducted a series of experiments with human embryonic kidney cells. From their results, they estimated that following treatment, each individual cell was coated with approximately 270,000 DNA molecules. Similar results were obtained using a line of human T-cells, cal
'"/>

Source:DOE/Lawrence Berkeley National Laboratory


Page: 1 2 3 4

Related biology news :

1. Octopuses occasionally stroll around on two arms, UC Berkeley biologists report
2. ORNL, UC Berkeley unravel real-world clues to Earths mysteries
3. UC Berkeley researchers create a biologically-inspired artificial compound eye
4. NYU researchers simulate molecular biological clock
5. Vital step in cellular migration described by UCSD medical researchers
6. ASU researchers finds novel chemistry at work to provide parrots vibrant red colors
7. UCSD researchers maintain stem cells without contaminated animal feeder layers
8. Why do insects stop breathing? To avoid damage from too much oxygen, say researchers
9. New protein discovered by Hebrew University researchers
10. First real-time view of developing neurons reveals surprises, say Stanford researchers
11. Agilent Technologies releases automated literature search tool for biology researchers
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Berkeley researchers lay groundwork for cell version DNA chip

(Date:10/14/2014)... Sinai-led research team has discovered a new kind of stem ... cell that lines liver blood vessels, according to a study ... The existence of such a cell type contradicts current theory ... and may hold clues to origins of, and future treatment ... a single cell into a complex being made up of ...
(Date:10/14/2014)... 14, 2014 – Scientists from The Scripps Research Institute ... Institutes of Health (NIH) to lead an investigation of ... disease in Africa. The study aims to understand how ... die, while others survive the inflection. , "The ... mechanism of how Lassa fever virus causes disease and ...
(Date:10/14/2014)... week, an international team of researchers, led by the ... the journal Nature Genetics a brief genomic ... varieties of the tomato plant. , The C.M. Rick ... important role in this study by providing seed of ... This study, which builds on the first tomato genome ...
Breaking Biology News(10 mins):Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 2Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 3Scripps Research Institute team receives $6.6 million to investigate deadly Lassa virus 2
... at Vanderbilt University have "engineered" a mouse that can ... normal mouse by increasing its supply of acetylcholine, the ... month in the journal Neuroscience, could lead to new ... occurs when cholinergic nerve signals fail to reach the ...
... Plastics-based materials have been in use for decades. ... their quest for new developments: Substantial influences of ... cannot be observed directly. The synthetic polymer molecules ... mechanical experiments. A team of physicists led by ...
... scientists and physicians at the Medical College of Wisconsin and ... treat an unknown disease. For the one of the ... Medical College of Wisconsin and Children,s Hospital of Wisconsin sequenced ... previously-unknown mutation. The team was able not only to ...
Cached Biology News:Boosting supply of key brain chemical reduces fatigue in mice 2Muscle filaments make mechanical strain visible 2Scientists and physicians use genetic sequencing to identify and treat unknown disease 2
(Date:10/20/2014)... Oct. 20, 2014 Asterias Biotherapeutics, Inc. ... has signed a Notice of Grant Award (NGA) ... effective October 1, 2014.  The NGA provides for ... the release of additional grant funds pursuant to ... for clinical development of Asterias, product, AST-OPC1. The ...
(Date:10/20/2014)... PureTech , a science and technology development ... today the closing of a $55 million growth ... a $120 Billion group of funds. The funding ... forward and to advance new healthcare related products ... really go for the big ideas that can ...
(Date:10/19/2014)... Latin American hardware encryption display market report defines and ... forecast of revenue. This market was valued at $165.0 ... million by 2018, at a CAGR of 70.3% from ... the Latin American hardware encryption market report to get ... provides a glimpse of the segmentation of the market, ...
(Date:10/19/2014)... 2014 The Asian Automatic patient billing ... analysis and forecast of revenue. The Automatic patient billing ... $463.9 million by 2018, at a developing CAGR of ... TOC of the Asian Automatic patient billing market, to ... also provides a glimpse of the segmentation of this ...
Breaking Biology Technology:Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 2Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 3Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 2PureTech Announces Expansion with Oversubscribed $55M Funding Round 3PureTech Announces Expansion with Oversubscribed $55M Funding Round 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 5PureTech Announces Expansion with Oversubscribed $55M Funding Round 6The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 3The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 2The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 3
... NEW YORK, May 7 When leading contract research,organization ... system to a voice-over Internet protocol (VoIP),system that would ... nothing short of catastrophic., POI initially selected a ... but it was immediately clear the solution was a ...
... Carbon nanotubes potential as a super material is blighted ... take the form of an unprepossessing pile of sooty black ... in the University of Warwicks Department of Chemistry have found ... form a highly sensitive ready made electric circuit. , The ...
... Leading Venture Contest Makes Carnegie Mellon ,Winningest, ... ... team of,students from the Tepper School of Business at Carnegie Mellon have ... This year,s winning venture business -- NeuroBank -- has developed,a breakthrough proprietary ...
Cached Biology Technology:Pharm-Olam Finds VoIP Solution in Taridium LLC 2Nanotube production leaps from sooty mess in test tube to ready formed chemical microsensors 2Tepper School Team Takes Top Honors at Global Moot Corp(R) Competition 2
... from a hematopoietic stem cells called monocytes. ... bone surface and lowering the surrounding pH ... The bone mineral is then solubilized and ... is controlled primarily by Macrophage Colony-Stimulating Factor ...
... Proliferator-Activated Receptor-gamma (PPAR) is a member ... ligand-activated transcription factors that heterodimerize with ... involved in the regulation of glucose ... (TZD) class of anti-diabetic agents called ...
... acid hybridization Preparation Reconstitution: one ... 50 mg ficoll and 50 ... ml of water yields a ... biology Density: 1.00 g/mL (20 ...
... ProteinChip Antibody Capture Kit ... and optimization steps typically ... interactions. This kit enables ... of multiple antigens based ...
Biology Products: