Unknown

Dataset Information

0

A cell permeable NPE caged ADP-ribose for studying TRPM2.


ABSTRACT: Transient potential receptor melastatin-2 (TRPM2) is a non-selective Ca(2+)-permeable cation channel of the TRPM channel subfamily and is mainly activated by intracellular adenosine diphosphate ribose (ADPR). Here we synthesized a 1-(2-nitrophenyl)ethyl caged ADPR (NPE-ADPR) and found that uncaging of NPE-ADPR efficiently stimulated Ca(2+), Mg(2+), and Zn(2+) influx in a concentration-dependent manner in intact human Jurkat T-lymphocytes. The cation influx was inhibited by inhibitors or knockdown of TRPM2. Likewise, uncaging of NPE-ADPR markedly induced cation entry in HEK 293 cells that overexpress TRPM2. As expected, high temperature increased the ability of the photolyzed NPE-ADPR to induce cation entry, whereas acidic pH inhibited. Moreover, the absence of extracellular Ca(2+) significantly inhibited Mg(2+) and Zn(2+) influx after uncaging NPE-ADPR. On the other hand, the absence of extracellular Na(+) or Mg(2+) had no effect on photolyzed NPE-ADPR induced Ca(2+) entry. Taken together, our results indicated that NPE-ADPR is a cell permeable ADPR analogue that is useful for studying TRPM2-mediated cation entry in intact cells.

SUBMITTER: Yu P 

PROVIDER: S-EPMC3517590 | BioStudies | 2012-01-01

REPOSITORIES: biostudies

Similar Datasets

1000-01-01 | S-EPMC2779714 | BioStudies
1000-01-01 | S-EPMC2678461 | BioStudies
1000-01-01 | S-EPMC4399500 | BioStudies
1000-01-01 | S-EPMC3397904 | BioStudies
1000-01-01 | S-EPMC4411260 | BioStudies
1000-01-01 | S-EPMC3873810 | BioStudies
2017-01-01 | S-EPMC5563452 | BioStudies
2016-01-01 | S-EPMC4974056 | BioStudies
2010-01-01 | S-EPMC2943302 | BioStudies
2006-01-01 | S-EPMC1550310 | BioStudies