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JPK reports on the use of the CellHesion 200 system to study cellular adhesion at the molecular level in the field of diabetes at the University of Warwick.

Dr Paul Squires from the University of Warwick with his JPK CellHesion®200 system

Berlin, 26th March, 2014: JPK Instruments, a world-leading manufacturer of nanoanalytic instrumentation for research in life sciences and soft matter, reports on the study of the research work of Dr Paul Squires and his colleagues at the University of Warwick.

Dr Paul Squires and Dr Claire Hills from the School of Life Sciences (SLS) at the University of Warwick have international expertise in cell biology, signalling and endocrinology. They are using the JPK CellHesion® 200 system (funded by Diabetes UK) to nurture multi-disciplinary research between SLS and the School of Engineering (Dr K-K Liu) in addition to external collaborations, e.g. Professor Peter Jones (King’s College London). The innovative nanotechnology is being used to explore a range of problems in biomedicine, biology and pharmacokinetics related to the field of energy homeostasis and diabetes, and the state-of-the-art resource facilitates their experimental work on models of the disease, bridging the gap between basic science, nanotechnology and medicine for developing the next-generation of therapies.

Cell-cell adhesion has been studied using fluorescence microscopy, capillary techniques or mechanical methods such as rotation assays and flow chambers. However, all of these techniques have limitations. Either they provide qualitative results that are difficult to interpret or are complicated to operate. The CellHesion® 200 is an integrated system designed to measure cell-cell and cell-substrate interactions. Epithelial tubular cells of the kidney are large and have an elastic membrane. To resolve complete separation of two adherent cells we require a system with a pulling length of up to 100 μm. Other AFM instruments cannot offer this level of manoeuvrability and are unable to record full separation of large cells. The CellHesion® 200 system can also be used to quantify membrane rigidity and cellular responses to external mechanical stress. This facilitates investigations into glucose-evoked changes in TRPV4-mediated mechano-sensation in the renal collecting duct.

The group have published several papers relating to diabetes research where the CellHesion system has been integral to their investigations. These include papers* in the journals of Experimental Diabetes Research, Diabetologia, Febs Lettersand Cell Physiology & Biochemistry. Most recently, the group has reported results on the study of the effects of the “party drug” ketamine and its effect on renal and bladder behaviour were CellHesion is being used to assess if early changes in candidate protein expression at the adherens junction functionally uncouple cells ahead of overt loss in epithelial function (in PLoS one, funded by the Rosetrees Trust).

Commenting about the use of the CellHesion® 200, Dr Squires said “To resolve complete separation of two adherent cells we require a system with a pulling length of up to 100 μm. The CellHesion system is the only AFM-based instrument on the market capable of allowing this degree of separation.”

For more details about JPK’s CellHesion® 200 system and applications for the bio & nano sciences, please contact JPK on +49 30533112070, visit the web site: www.jpk.com/ or see more on Facebook: www.jpk.com/facebook and on You Tube: www.youtube.com/jpkinstruments. *References

Hills CE, Siamantouras E, Smith SW, Cockwell P, Liu K-K, Squires PE: TGFβ modulates cell-cell communication in early epithelial-to-mesenchymal transition. Diabetologia, 55, 812-824, 2012

Hills CE, Bland R, Squires PE. Functional expression of TRPV4 channels in human collecting duct (HCD)-cells: implications for secondary hypertension in diabetic nephropathy. Ex Diabetes Research. vol. 2012, Article ID 936518, 9 pages, 2012. doi:10.1155/2012/936518

Hills CE, Younis MYG, Bennett J, Siamantouras E, Liu K-K, Squires PE: Calcium-sensing receptor activation increases cell-cell adhesion and β-cell function. Cell Physiol Biochem, 30, 575-586, 2012

Hills CE, Jin T, Siamantouras E, Liu K-K, Jefferson KP, Squires PE. Ketamine evokes a loss of cell-to-cell adhesion in human proximal tubule through modulation of the adherens junction complex. PLoS one 2013 8(8): e71819

Siamantouras E, Hills CE, Younis MYG, Squires PE, Liu K-K. Quantitative investigation of calcimimetic R568 on beta-cell adhesion and mechanics using AFM single-cell force spectroscopy. FEBS Letts, 2014, in press.

About JPK Instruments

JPK Instruments AG is a world-leading manufacturer of nanoanalytic instruments – particularly atomic force microscope (AFM) systems and optical tweezers – for a broad range of applications reaching from soft matter physics to nano-optics, from surface chemistry to cell and molecular biology. From its earliest days applying atomic force microscope (AFM) technology, JPK has recognized the opportunities provided by nanotechnology for transforming life sciences and soft matter research. This focus has driven JPK’s success in uniting the worlds of nanotechnology tools and life science applications by offering cutting-edge technology and unique applications expertise. Headquartered in Berlin and with direct operations in Dresden, Cambridge (UK), Singapore, Tokyo and Paris (France), JPK maintains a global network of distributors and support centers and provides on the spot applications and service support to an ever-growing community of researchers.

For further information:
JPK Instruments AG
Bouchéstrasse 12
Haus 2, Aufgang C
Berlin 12435
Germany
T +49 30533112070
F +49 30 5331 22555
http://www.jpk.com/
bagordo@jpk.com

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