Difference between revisions of "Astin 2013 Sci Rep"
(Created page with "{{Publication |title=Astin R, Bentham R, Djafarzadeh S, Horscroft JA, Kuc RE, Leung PS, Skipworth JR, Vicencio JM, Davenport AP, Murray AJ, Takala J, Jakob SM, Montgomery H, Szab...") |
|||
| Line 1: | Line 1: | ||
{{Publication | {{Publication | ||
|title=Astin R, Bentham R, Djafarzadeh S, Horscroft JA, Kuc RE, Leung PS, Skipworth JR, Vicencio JM, Davenport AP, Murray AJ, Takala J, Jakob SM, Montgomery H, Szabadkai G (2013) No evidence for a local renin-angiotensin system in liver mitochondria. Sci Rep 3:2467. | |title=Astin R, Bentham R, Djafarzadeh S, Horscroft JA, Kuc RE, Leung PS, Skipworth JR, Vicencio JM, Davenport AP, Murray AJ, Takala J, Jakob SM, Montgomery H, Szabadkai G (2013) No evidence for a local renin-angiotensin system in liver mitochondria. Sci Rep 3:2467. | ||
|info=[http://www.ncbi.nlm.nih.gov/pubmed/23959064 PMID:23959064] | |info=[http://www.ncbi.nlm.nih.gov/pubmed/23959064 PMID:23959064] | ||
|authors=Astin R, Bentham R, Djafarzadeh S, Horscroft JA, Kuc RE, Leung PS, Skipworth JR, Vicencio JM, Davenport AP, Murray AJ, Takala J, Jakob SM, Montgomery H, Szabadkai G | |authors=Astin R, Bentham R, Djafarzadeh S, Horscroft JA, Kuc RE, Leung PS, Skipworth JR, Vicencio JM, Davenport AP, Murray AJ, Takala J, Jakob SM, Montgomery H, Szabadkai G | ||
|year=2013 | |year=2013 | ||
|journal=Sci Rep | |journal=Sci Rep | ||
|abstract=The circulating, endocrine renin-angiotensin system (RAS) is important to circulatory homeostasis, while ubiquitous tissue and cellular RAS play diverse roles, including metabolic regulation. Indeed, inhibition of RAS is associated with improved cellular oxidative capacity. Recently it has been suggested that an intra-mitochondrial RAS directly impacts on metabolism. Here we sought to rigorously explore this hypothesis. Radiolabelled ligand-binding and unbiased proteomic approaches were applied to purified mitochondrial sub-fractions from rat liver, and the impact of AngII on mitochondrial function assessed. Whilst high-affinity AngII binding sites were found in the mitochondria-associated membrane (MAM) fraction, no RAS components could be detected in purified mitochondria. Moreover, AngII had no effect on the function of isolated mitochondria at physiologically relevant concentrations. We thus found no evidence of endogenous mitochondrial AngII production, and conclude that the effects of AngII on cellular energy metabolism are not mediated through its direct binding to mitochondrial targets. | |abstract=The circulating, endocrine renin-angiotensin system (RAS) is important to circulatory homeostasis, while ubiquitous tissue and cellular RAS play diverse roles, including metabolic regulation. Indeed, inhibition of RAS is associated with improved cellular oxidative capacity. Recently it has been suggested that an intra-mitochondrial RAS directly impacts on metabolism. Here we sought to rigorously explore this hypothesis. Radiolabelled ligand-binding and unbiased proteomic approaches were applied to purified mitochondrial sub-fractions from rat liver, and the impact of AngII on mitochondrial function assessed. Whilst high-affinity AngII binding sites were found in the mitochondria-associated membrane (MAM) fraction, no RAS components could be detected in purified mitochondria. Moreover, AngII had no effect on the function of isolated mitochondria at physiologically relevant concentrations. We thus found no evidence of endogenous mitochondrial AngII production, and conclude that the effects of AngII on cellular energy metabolism are not mediated through its direct binding to mitochondrial targets. | ||
}} | }} | ||
{{Labeling | {{Labeling | ||
| Line 11: | Line 11: | ||
|tissues=Liver | |tissues=Liver | ||
|preparations=Isolated mitochondria | |preparations=Isolated mitochondria | ||
|couplingstates=OXPHOS | |||
|substratestates=CI, CII, CIV | |||
|instruments=Oxygraph-2k | |instruments=Oxygraph-2k | ||
|additional=Labels | |additional=Labels | ||
}} | }} | ||
== Correction == | |||
An OROBOROS Oxygraph-2k, Innsbruck, Austria was used in this publication, whereas the "Graz, Austria" reference usually credits the first generation Anton Paar/OROBOROS Oxygraph, the first-generation instrument for high-resolution respirometry, which was replaced by the Oxygraph-2k in 2002. | |||
* ''Further details'': [[Gnaiger 2012 Abstract Bioblast-Gentle Science]] | |||
Revision as of 16:13, 29 April 2015
| Astin R, Bentham R, Djafarzadeh S, Horscroft JA, Kuc RE, Leung PS, Skipworth JR, Vicencio JM, Davenport AP, Murray AJ, Takala J, Jakob SM, Montgomery H, Szabadkai G (2013) No evidence for a local renin-angiotensin system in liver mitochondria. Sci Rep 3:2467. |
Astin R, Bentham R, Djafarzadeh S, Horscroft JA, Kuc RE, Leung PS, Skipworth JR, Vicencio JM, Davenport AP, Murray AJ, Takala J, Jakob SM, Montgomery H, Szabadkai G (2013) Sci Rep
Abstract: The circulating, endocrine renin-angiotensin system (RAS) is important to circulatory homeostasis, while ubiquitous tissue and cellular RAS play diverse roles, including metabolic regulation. Indeed, inhibition of RAS is associated with improved cellular oxidative capacity. Recently it has been suggested that an intra-mitochondrial RAS directly impacts on metabolism. Here we sought to rigorously explore this hypothesis. Radiolabelled ligand-binding and unbiased proteomic approaches were applied to purified mitochondrial sub-fractions from rat liver, and the impact of AngII on mitochondrial function assessed. Whilst high-affinity AngII binding sites were found in the mitochondria-associated membrane (MAM) fraction, no RAS components could be detected in purified mitochondria. Moreover, AngII had no effect on the function of isolated mitochondria at physiologically relevant concentrations. We thus found no evidence of endogenous mitochondrial AngII production, and conclude that the effects of AngII on cellular energy metabolism are not mediated through its direct binding to mitochondrial targets.
Labels:
Organism: Rat
Tissue;cell: Liver
Preparation: Isolated mitochondria
Coupling state: OXPHOS
HRR: Oxygraph-2k
Labels
Correction
An OROBOROS Oxygraph-2k, Innsbruck, Austria was used in this publication, whereas the "Graz, Austria" reference usually credits the first generation Anton Paar/OROBOROS Oxygraph, the first-generation instrument for high-resolution respirometry, which was replaced by the Oxygraph-2k in 2002.
- Further details: Gnaiger 2012 Abstract Bioblast-Gentle Science
