| Title |
Hydrogen sulphide facilitates exocytosis by regulating the handling of intracellular calcium by chromaffin cells
|
|---|---|
| Published in |
Pflügers Archiv - European Journal of Physiology, May 2018
|
| DOI | 10.1007/s00424-018-2147-7 |
| Pubmed ID | |
| Authors |
Ricardo de Pascual, Andrés M. Baraibar, Iago Méndez-López, Martín Pérez-Ciria, Ignacio Polo-Vaquero, Luis Gandía, Sunny E. Ohia, Antonio G. García, Antonio M. G. de Diego |
| Abstract |
Gasotransmitter hydrogen sulphide (H2S) has emerged as a regulator of multiple physiological and pathophysiological processes throughout. Here, we have investigated the effects of NaHS (fast donor of H2S) and GYY4137 (GYY, slow donor of H2S) on the exocytotic release of catecholamines from fast-perifused bovine adrenal chromaffin cells (BCCs) challenged with sequential intermittent pulses of a K+-depolarizing solution. Both donors caused a concentration-dependent facilitation of secretion. This was not due to an augmentation of Ca2+ entry through voltage-activated Ca2+ channels (VACCs) because, in fact, NaHS and GYY caused a mild inhibition of whole-cell Ca2+ currents. Rather, the facilitation of exocytosis seemed to be associated to an augmented basal [Ca2+]c and the K+-elicited [Ca2+]c transients; such effects of H2S donors are aborted by cyclopiazonic acid (CPA), that causes endoplasmic reticulum (ER) Ca2+ depletion through sarcoendoplasmic reticulum Ca2+ ATPase inhibition and by protonophore carbonyl cyanide 4-(trifluoromethoxy)phenylhydrazone (FCCP), that impedes the ability of mitochondria to sequester cytosolic Ca2+ during cell depolarization. Inasmuch as CPA and FCCP reversed the facilitation of secretion triggered by K+ in the presence of NaHS and GYY, is seems that such facilitation is tightly coupled to Ca2+ handling by the ER and mitochondria. On the basis of these results, we propose that H2S regulates catecholamine secretory responses triggered by K+ in BCCs by (i) mobilisation of ER Ca2+ and (ii) interference with mitochondrial Ca2+ circulation. In so doing, the clearance of the [Ca2+]c transient will be delayed and the Ca2+-dependent trafficking of secretory vesicles will be enhanced to overfill the secretory machinery with new vesicles to enhance exocytosis. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 17 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 17 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 3 | 18% |
| Student > Bachelor | 3 | 18% |
| Student > Doctoral Student | 2 | 12% |
| Professor | 2 | 12% |
| Student > Ph. D. Student | 2 | 12% |
| Other | 2 | 12% |
| Unknown | 3 | 18% |
| Readers by discipline | Count | As % |
|---|---|---|
| Pharmacology, Toxicology and Pharmaceutical Science | 4 | 24% |
| Agricultural and Biological Sciences | 3 | 18% |
| Biochemistry, Genetics and Molecular Biology | 2 | 12% |
| Environmental Science | 1 | 6% |
| Nursing and Health Professions | 1 | 6% |
| Other | 3 | 18% |
| Unknown | 3 | 18% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 May 2018.
All research outputs
#21,164,509
of 23,818,521 outputs
Outputs from Pflügers Archiv - European Journal of Physiology
#1,798
of 1,973 outputs
Outputs of similar age
#289,436
of 327,918 outputs
Outputs of similar age from Pflügers Archiv - European Journal of Physiology
#12
of 16 outputs
Altmetric has tracked 23,818,521 research outputs across all sources so far. This one is in the 1st percentile – i.e., 1% of other outputs scored the same or lower than it.
So far Altmetric has tracked 1,973 research outputs from this source. They receive a mean Attention Score of 5.0. This one is in the 1st percentile – i.e., 1% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 327,918 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 16 others from the same source and published within six weeks on either side of this one. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.