Navigation Links
Precise docking sites for cells
Date:12/11/2013

This news release is available in German.

The Petri dish is a classical biological laboratory device, but it is no ideal living environment for many types of cells. Studies lose validity, as cell behavior on a flat plastic surface differs from that in branched lung tissue, for example. Researchers of Karlsruhe Institute of Technology have now presented a method to make three-dimensional structures attractive or repellent for certain types of cells (DOI: 10.1002/adma.201302492 and 201302678).

"Now, we can rapidly and precisely design the ideal Petri dish for single cells," Barner-Kowollik explains. Barner-Kowollik's and Martin Bastmeyer's team of chemists and biologists at KIT developed a new photochemical surface coding method. It allows for the precise modification of three-dimensional microscaffolds. "Customized structuring of adhesion points for cells allows for studying the behavior of individual cells in a close-to-reality environment," Bastmeyer says.

The Petri dish resembles a miniaturized ropes course. Its size is one fiftieth of a millimeter at the maximum. Isolated cells can be hung up between traverses and observed without any disturbing impacts. By an appropriate coating of traverses and poles, the cells are kept at the desired place and, if necessary, stimulated to grow. "In this way, we can study the motion and force of individual cells," Bastmeyer points out.

To construct and coat the Petri dish with nanometer resolution, the cell researchers and polymer chemists use a direct laser writing method. Originally, this method was developed by the team of Martin Wegener from KIT for use in nanooptics. The three-dimensional scaffold forms at the points of intersection of two laser beams in a photoresist. At these points, the resist is hardened. For coating the scaffold, the team of Barner-Kowollik and Martin Bastmeyer uses various bioactive molecules and a photoactive group. Coupling is activated at the points illuminated by the laser beam only. There, bioactive molecules bind chemically to the surface. The physico-chemical properties and parameters, such as the flexibility or three-dimensional arrangement of cell docking sites, can be adjusted with a high local resolution when using these modern photochemical methods.

A whole set of photochemical surface coding methods is now presented by six publications in the latest issues of the magazines Angewandte Chemie, Chemical Science, and Advanced Materials. Using this set of methods, chemical bonds can be produced efficiently and in a locally controlled manner without catalysts or increased temperatures being required. Depending on the application, it is possible to maximize coupling efficiency, to accelerate the photoreaction, to directly couple to unmodified biomarkers, to reduce chemical synthesis work, or to design areas where no cell adhesion can take place.


'/>"/>

Contact: Monika Landgraf
presse@kit.edu
49-721-608-47414
Helmholtz Association
Source:Eurekalert  

Related biology news :

1. Automated system promises precise control of medically induced coma
2. Researchers reveal new more precise method of performing electroconvulsive therapy
3. Material screening method allows more precise control over stem cells
4. Biomass analysis tool is faster, more precise
5. PNAS: Precise molecular surgery in the plant genome
6. Discovered how mice survive infection by virulent Toxoplasma parasites
7. Pro Ana and Thinspiration Sites Under Attack
8. Does including parasites upset food web theory? Yes and no, says new paper
9. Do parasites upset food web theory?
10. Children living near toxic waste sites experience higher blood lead levels resulting in lower IQ
11. Toxic waste sites cause healthy years of life lost
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Precise docking sites for cells
(Date:6/20/2016)... , June 20, 2016 Securus Technologies, ... technology solutions for public safety, investigation, corrections and ... prisons involved, it has secured the final acceptance ... facilities for Managed Access Systems (MAS) installed. Furthermore, ... facilities to be installed by October, 2016. MAS ...
(Date:6/15/2016)... ALBANY, New York , June 15, 2016 ... published a new market report titled "Gesture Recognition Market ... Trends and Forecast, 2016 - 2024". According to the ... at USD 11.60 billion in 2015 and is ... and reach USD 48.56 billion by 2024.  ...
(Date:6/9/2016)... -- Paris Police Prefecture ... to ensure the safety of people and operations in several ... tournament Teleste, an international technology group specialised in ... that its video security solution will be utilised by ... safety across the country. The system roll-out is scheduled for ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... WI (PRWEB) , ... June 23, 2016 , ... ... supplements, is pleased to announce the launch of their brand, UP4™ Probiotics, into ... for over 35 years, is proud to add Target to its list of ...
(Date:6/23/2016)... -- Houston Methodist Willowbrook Hospital has signed a ... serve as their official health care provider. As ... provide sponsorship support, athletic training services, and most ... athletes and families. "We are excited ... to bring Houston Methodist quality services and programs ...
(Date:6/23/2016)... SAN FRANCISCO , June 23, 2016   ... it has secured $1 million in debt financing from ... to ramp up automation and to advance its drug ... for its new facility. "SVB has been ... goes beyond the services a traditional bank would provide," ...
(Date:6/23/2016)... Ky. , June 23, 2016 ... two Phase 1 clinical trials of its complement ... placebo-controlled, single and multiple ascending dose studies designed ... pharmacodynamics (PD) of subcutaneous injection in healthy adult ... subcutaneously (SC) either as a single dose (ranging ...
Breaking Biology Technology: