FMP Publications

Our publications are recorded in a searchable database since 2010, updates will be added regularly.

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Perspectives for sensitivity enhancement in proton-detected solid-state NMR of highly deuterated proteins by preserving water magnetization
Chevelkov, V., Xiang(*), S. Q., Giller(*), K., Becker(*), S., Lange, A.; Reif(*), B.
J. Biomol. NMR, 61:151-160

Tags: Molecular Biophysics (Lange, A.)

Abstract: In this work, we show how the water flip-back approach that is widely employed in solution-state NMR can be adapted to proton-detected MAS solid-state NMR of highly deuterated proteins. The scheme allows to enhance the sensitivity of the experiment by decreasing the recovery time of the proton longitudinal magnetization. The method relies on polarization transfer from non-saturated water to the protein during the inter-scan delay.

Subunit composition of VRAC channels determines substrate specificity and cellular resistance to Pt-based anti-cancer drugs
Planells-Cases, R., Lutter, D., Guyader(*), C., Gerhards(*), N. M., Ullrich, F., Elger, D. A., Kucukosmanoglu(*), A., Xu(*), G., Voss, F. K., Reincke, S. M., Stauber, T., Blomen(*), V. A., Vis(*), D. J., Wessels(*), L. F., Brummelkamp(*), T. R., Borst(*), P., Rottenberg(*), S.; Jentsch, T. J.
EMBO J, 34:2993-3008

Tags: Physiology and Pathology of Ion Transport (Jentsch)

Abstract: Although platinum-based drugs are widely used chemotherapeutics for cancer treatment, the determinants of tumor cell responsiveness remain poorly understood. We show that the loss of subunits LRRC8A and LRRC8D of the heteromeric LRRC8 volume-regulated anion channels (VRACs) increased resistance to clinically relevant cisplatin/carboplatin concentrations. Under isotonic conditions, about 50% of cisplatin uptake depended on LRRC8A and LRRC8D, but neither on LRRC8C nor on LRRC8E. Cell swelling strongly enhanced LRRC8-dependent cisplatin uptake, bolstering the notion that cisplatin enters cells through VRAC. LRRC8A disruption also suppressed drug-induced apoptosis independently from drug uptake, possibly by impairing VRAC-dependent apoptotic cell volume decrease. Hence, by mediating cisplatin uptake and facilitating apoptosis, VRAC plays a dual role in the cellular drug response. Incorporation of the LRRC8D subunit into VRAC substantially increased its permeability for cisplatin and the cellular osmolyte taurine, indicating that LRRC8 proteins form the channel pore. Our work suggests that LRRC8D-containing VRACs are crucial for cell volume regulation by an important organic osmolyte and may influence cisplatin/carboplatin responsiveness of tumors.

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Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP)
Campus Berlin-Buch
Robert-Roessle-Str. 10
13125 Berlin, Germany
+4930 94793 - 100 
+4930 94793 - 109 (Fax)

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