Navigation Links
Precise docking sites for cells

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
Helmholtz Association

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:
Related Image:
Precise docking sites for cells
(Date:11/12/2015)... 11, 2015   Growing need for low-cost, ... has been paving the way for use of ... discrete analytes in clinical, agricultural, environmental, food and ... used in medical applications, however, their adoption is ... to continuous emphasis on improving product quality and ...
(Date:11/10/2015)...  In this report, the biomarkers market ... type, application, disease indication, and geography. The ... consumables, services, software. The type segments included ... biomarkers, and validation biomarkers. The applications segments ... drug discovery and development, personalized medicine, disease ...
(Date:11/9/2015)... , Nov. 09, 2015 ... the addition of the "Global Law ... their offering. --> ) ... "Global Law Enforcement Biometrics Market 2015-2019" ... Research and Markets ( ) has ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... ... November 25, 2015 , ... ... were featured on AngelList early in their initial angel funding process. Now, they ... for individuals looking to make early stage investments in the microbiome space. ...
(Date:11/24/2015)... FAR HILLS, N.J. (PRWEB) , ... November 24, 2015 , ... ... University, as the recipient of the 2016 USGA Green Section Award. Presented annually since ... of golf through his or her work with turfgrass. , Clarke, of ...
(Date:11/24/2015)... , Nov. 24, 2015 Halozyme Therapeutics, Inc. (NASDAQ: ... Conference in New York on Wednesday, December ... Helen Torley , president and CEO, will provide a corporate overview. ... New York at 1:00 p.m. ET/10:00 a.m. PT . ... investor relations, will provide a corporate overview. --> th ...
(Date:11/24/2015)... ... 24, 2015 , ... Copper is an essential micronutrient that ... proteins, copper is also toxic to cells. With a $1.3 million award from ... conduct a systematic study of copper in the bacteria Pseudomonas aeruginosa (P. aeruginosa), ...
Breaking Biology Technology: