Inhibition of anion channels derived from mitochondrial membranes of the rat heart by stilbene disulfonate—DIDS Export

@article{citeulike:5433260, abstract = {Abstract\ \ The objective of this work was to characterize in more detail the inhibition effect of diisothiocyanatostilbene-2′,2-disulfonic acid (DIDS) on anion channels isolated from the rat heart mitochondria. The channels reconstituted into a planar lipid membrane displayed limited powers of discrimination between anions and cations and the ion conductance measured under asymmetric (250/50\ mM KCl, cis/trans) and symmetric (150\ mM KCl) conditions was ∼100\ pS. DIDS caused a dramatic decrease in the channel activity (IC50 = 11.7 � 3.1\ μM) only when it was added to the cis side of a planar lipid membrane. The inhibition was accompanied by the significant prolongation of closings and the shortening of openings within the burst as well as gaps between bursts were prolonged and durations of bursts were reduced. The blockade was complete and irreversible when concentration of DIDS was increased up to 200\ μM. Our data indicate that DIDS is an allosteric blocker of mitochondrial anion channels and this specific effect could be used as a tool for reliable identification of anion channels on the functional level.}, author = {Tomaskova, Zuzana and Gaburjakova, Jana and Brezova, Anna and Gaburjakova, Marta}, citeulike-article-id = {5433260}, citeulike-linkout-0 = {http://dx.doi.org/10.1007/s10863-007-9090-1}, citeulike-linkout-1 = {http://www.springerlink.com/content/1412803702up512h}, day = {1}, doi = {10.1007/s10863-007-9090-1}, journal = {Journal of Bioenergetics and Biomembranes}, keywords = {bilayer, mitochondria}, month = {August}, number = {4}, pages = {301--311}, posted-at = {2009-08-13 20:25:29}, priority = {2}, title = {Inhibition of anion channels derived from mitochondrial membranes of the rat heart by stilbene disulfonate—DIDS}, url = {http://dx.doi.org/10.1007/s10863-007-9090-1}, volume = {39}, year = {2007} }

TY - JOUR ID - citeulike:5433260 L3 - citeulike-article-id:5433260 N2 - Abstract  The objective of this work was to characterize in more detail the inhibition effect of diisothiocyanatostilbene-2′,2-disulfonic acid (DIDS) on anion channels isolated from the rat heart mitochondria. The channels reconstituted into a planar lipid membrane displayed limited powers of discrimination between anions and cations and the ion conductance measured under asymmetric (250/50 mM KCl, cis/trans) and symmetric (150 mM KCl) conditions was ∼100 pS. DIDS caused a dramatic decrease in the channel activity (IC50 = 11.7 � 3.1 μM) only when it was added to the cis side of a planar lipid membrane. The inhibition was accompanied by the significant prolongation of closings and the shortening of openings within the burst as well as gaps between bursts were prolonged and durations of bursts were reduced. The blockade was complete and irreversible when concentration of DIDS was increased up to 200 μM. Our data indicate that DIDS is an allosteric blocker of mitochondrial anion channels and this specific effect could be used as a tool for reliable identification of anion channels on the functional level. IS - 4 JF - Journal of Bioenergetics and Biomembranes EP - 311 TI - Inhibition of anion channels derived from mitochondrial membranes of the rat heart by stilbene disulfonate—DIDS VL - 39 SP - 301 KW - bilayer KW - mitochondria AU - Tomaskova, Zuzana AU - Gaburjakova, Jana AU - Brezova, Anna AU - Gaburjakova, Marta PY - 2007/08/01/ UR - http://dx.doi.org/10.1007/s10863-007-9090-1 ER -