News / Meetings



NWG Göttingen 2019
13th meeting of the German Neuroscience Society

Mar 20-23, 2019, Göttingen, Germany
Booth No. 8


SFN - Neuroscience 2019
50th annual meeting of the Society for Neuroscience

Oct 19-23, 2019, Chicago, IL, USA
Booth No. 1468


BPS San Diego 2020
64th annual meeting of the Biophysical Society

Feb 15-19, 2020 San Diego, CA, USA
Booth No. 710

Calcium rises evoked by localized photolysis of caged IP3

Single smooth muscle cell

The smooth muscle cell was voltage clamped in whole cell configuration and the membrane potential maintained at -70mV. Calcium was imaged using fluo-3 at a rate of 25 frames per second and released from the internal calcium store by photolyzing caged IP3. Caged IP3 was introduced to the cell via the patch pipette filling solution. Contraction was prevented by the drug Wortmanin.

Uncaging spots


Using the  UGA-40 system for a fast movable Spot Illumination a sequence of 5 spots to be illuminated has been programmed. The delay time between the illuminated spots was 1 sec each, the power of the laser (DPSL 355/30) has been reduced to less than 10%, the pulse was 5ms long. The spots to be illuminated were less than 4 µm and are marked with a red cross in the image below. The calcium response may be watched in the movie below.

Data by courtesy of:
Prof. John McCarron
Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS)
27 Taylor Street
Glasgow, U.K.

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