Hydrogen sulfide induces Ca2+ release from the endoplasmic reticulum and suppresses ATP-induced Ca2+ signaling in rat spinal cord astrocytes
Abstract
Hydrogen sulfide (H2S) has a variety of physiological functions. H2S reportedly increases intracellular Ca2+ concentration ([Ca2+];) in astrocytes. However, the precise mechanism and functional role of this increase are not known. Here, we examined the effects of H2S on [Ca2+]; in astrocytes from the rat spinal cord and whether H2S affects ATP-induced Ca2+ signaling, which is known to be involved in synaptic function. Na2S (150 mu M), an H2S donor, produced a nontoxic increase in [Ca2+];. The [Ca2+]; increase by Na2S was inhibited by Ca2+ depletion in the endoplasmic reticulum (ER) but not by removal of extracellular Ca2+, indicating that H2S releases Ca2+ from the ER. On the other hand, (NaS)-S-2 inhibited ATP-induced [Ca2+]; increase when Na2S clearly increased [Ca2+]; in the astrocytes, which was not suppressed by a reducing agent. In addition, Na2S had no effect on intracellular cyclic AMP (cAMP) level. These results indicate that oxidative post-translational modification of proteins and cAMP are not involved in the inhibitory effect of H2S on ATP-induced Ca2+ signaling. We conclude that H2S indirectly inhibits ATP-induced Ca2+ signaling by decreasing Ca2+ content in the ER in astrocytes. In this way, H2S may influence intercellular communication between astrocytes and neurons, thereby contributing to neuronal signaling in the nervous system.
Journal
-
- European journal of pharmacology
-
European journal of pharmacology 891 173684-, 2021-01-15
Elsevier
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1050853796615416192
-
- NII Article ID
- 120007184602
-
- HANDLE
- 2115/83830
-
- ISSN
- 00142999
-
- Text Lang
- en
-
- Article Type
- journal article
-
- Data Source
-
- IRDB
- Crossref
- CiNii Articles
- KAKEN