Highly thermosensitive Ca 2+ dynamics in a HeLa cell through IP 3 receptors

Vadim Tseeb, Madoka Suzuki, Kotaro Oyama, Kaoru Iwai, Shin'ichi Ishiwata*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


Intracellular Ca 2+ distribution and its dynamics are essential for various cellular functions. We show with single HeLa cells that a microscopic heat pulse induces Ca 2+ uptake into intracellular stores during heating and Ca 2+ release from them at the onset of recooling, and the overshoot of Ca 2+ release occurs above the critical value of a temperature change, which decreases from 1.5 to 0.2 °C on increasing the experimental temperature from 22 to 37 °C. This highly thermosensitive Ca 2+ dynamics is probably attributable to the altered balance between Ca 2+ uptake by endoplasmic reticulum Ca 2+-ATPases and Ca 2+ release via inositol 1,4,5-trisphosphate receptors. These results suggest that Ca 2+ signaling is extremely sensitive to temperature changes, especially around body temperature, in cells expressing inositol 1,4,5-trisphosphate receptors.

Original languageEnglish
Pages (from-to)117-123
Number of pages7
JournalHFSP Journal
Issue number2
Publication statusPublished - 2009 Apr

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Neuroscience(all)


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