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Scott NJA, Prickett TCR, Charles CJ, Espiner EA, Richards AM, Rademaker MT. Haemodynamic, hormonal and renal actions of osteocrin in normal sheep. Exp Physiol 2024. [PMID: 38890799 DOI: 10.1113/ep091826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 05/20/2024] [Indexed: 06/20/2024]
Abstract
Osteocrin (OSTN) is an endogenous protein sharing structural similarities with the natriuretic peptides [NPs; atrial (ANP), B-type (BNP) and C-type (CNP) NP], which are hormones known for their crucial role in maintaining pressure/volume homeostasis. Osteocrin competes with the NPs for binding to the receptor involved in their clearance (NPR-C). In the present study, having identified, for the first time, the major circulating form of OSTN in human and ovine plasma, we examined the integrated haemodynamic, endocrine and renal effects of vehicle-controlled incremental infusions of ovine proOSTN (83-133) and its metabolism in eight conscious normal sheep. Incremental i.v. doses of OSTN produced stepwise increases in circulating concentrations of the peptide, and its metabolic clearance rate was inversely proportional to the dose. Osteocrin increased plasma levels of ANP, BNP and CNP in a dose-dependent manner, together with concentrations of their intracellular second messenger, cGMP. Increases in plasma cGMP were associated with progressive reductions in arterial pressure and central venous pressure. Plasma cAMP, renin and aldosterone were unchanged. Despite significant increases in urinary cGMP levels, OSTN administration was not associated with natriuresis or diuresis in normal sheep. These results support OSTN as an endogenous ligand for NPR-C in regulating plasma concentrations of NPs and associated cGMP-mediated bioactivity. Collectively, our findings support a role for OSTN in maintaining cardiovascular homeostasis.
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Affiliation(s)
- Nicola J A Scott
- Department of Medicine, Christchurch Heart Institute, University of Otago Christchurch, Christchurch, New Zealand
| | - Timothy C R Prickett
- Department of Medicine, Christchurch Heart Institute, University of Otago Christchurch, Christchurch, New Zealand
| | - Christopher J Charles
- Department of Medicine, Christchurch Heart Institute, University of Otago Christchurch, Christchurch, New Zealand
| | - Eric A Espiner
- Department of Medicine, Christchurch Heart Institute, University of Otago Christchurch, Christchurch, New Zealand
| | - A Mark Richards
- Department of Medicine, Christchurch Heart Institute, University of Otago Christchurch, Christchurch, New Zealand
- Cardiovascular Research Institute, National University Health Systems, Centre for Translational Medicine, Singapore, Singapore
| | - Miriam T Rademaker
- Department of Medicine, Christchurch Heart Institute, University of Otago Christchurch, Christchurch, New Zealand
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Louis M, Tahrioui A, Tremlett CJ, Clamens T, Leprince J, Lefranc B, Kipnis E, Grandjean T, Bouffartigues E, Barreau M, Defontaine F, Cornelis P, Feuilloley MG, Harmer NJ, Chevalier S, Lesouhaitier O. The natriuretic peptide receptor agonist osteocrin disperses Pseudomonas aeruginosa biofilm. Biofilm 2023; 5:100131. [PMID: 37252226 PMCID: PMC10220261 DOI: 10.1016/j.bioflm.2023.100131] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 05/02/2023] [Accepted: 05/18/2023] [Indexed: 05/31/2023] Open
Abstract
Biofilms are highly tolerant to antimicrobials and host immune defense, enabling pathogens to thrive in hostile environments. The diversity of microbial biofilm infections requires alternative and complex treatment strategies. In a previous work we demonstrated that the human Atrial Natriuretic Peptide (hANP) displays a strong anti-biofilm activity toward Pseudomonas aeruginosa and that the binding of hANP by the AmiC protein supports this effect. This AmiC sensor has been identified as an analog of the human natriuretic peptide receptor subtype C (h-NPRC). In the present study, we evaluated the anti-biofilm activity of the h-NPRC agonist, osteocrin (OSTN), a hormone that displays a strong affinity for the AmiC sensor at least in vitro. Using molecular docking, we identified a pocket in the AmiC sensor that OSTN reproducibly docks into, suggesting that OSTN might possess an anti-biofilm activity as well as hANP. This hypothesis was validated since we observed that OSTN dispersed established biofilm of P. aeruginosa PA14 strain at the same concentrations as hANP. However, the OSTN dispersal effect is less marked than that observed for the hANP (-61% versus -73%). We demonstrated that the co-exposure of P. aeruginosa preformed biofilm to hANP and OSTN induced a biofilm dispersion with a similar effect to that observed with hANP alone suggesting a similar mechanism of action of these two peptides. This was confirmed by the observation that OSTN anti-biofilm activity requires the activation of the complex composed by the sensor AmiC and the regulator AmiR of the ami pathway. Using a panel of both P. aeruginosa laboratory reference strains and clinical isolates, we observed that the OSTN capacity to disperse established biofilms is highly variable from one strain to another. Taken together, these results show that similarly to the hANP hormone, OSTN has a strong potential to be used as a tool to disperse P. aeruginosa biofilms.
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Affiliation(s)
- Melissande Louis
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Ali Tahrioui
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Courtney J. Tremlett
- Living Systems Institute, Stocker Road, University of Exeter, Exeter, EX4 4QD, UK
| | - Thomas Clamens
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Jérôme Leprince
- PRIMACEN, University of Rouen Normandy, 76821, Mont-Saint-Aignan, France
| | - Benjamin Lefranc
- PRIMACEN, University of Rouen Normandy, 76821, Mont-Saint-Aignan, France
| | - Eric Kipnis
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d'Infection et d'Immunité de Lille, University Lille, F-59000, Lille, France
| | - Teddy Grandjean
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d'Infection et d'Immunité de Lille, University Lille, F-59000, Lille, France
| | - Emeline Bouffartigues
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Magalie Barreau
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Florian Defontaine
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Pierre Cornelis
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Marc G.J. Feuilloley
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Nicholas J. Harmer
- Living Systems Institute, Stocker Road, University of Exeter, Exeter, EX4 4QD, UK
| | - Sylvie Chevalier
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
| | - Olivier Lesouhaitier
- Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, CBSA UR4312, 27000, Evreux, France
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Perez-Ternero C, Pallier PN, Tremoleda JL, Delogu A, Fernandes C, Michael-Titus AT, Hobbs AJ. C-type natriuretic peptide preserves central neurological function by maintaining blood-brain barrier integrity. Front Mol Neurosci 2022; 15:991112. [PMID: 36267701 PMCID: PMC9577671 DOI: 10.3389/fnmol.2022.991112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/31/2022] [Indexed: 12/04/2022] Open
Abstract
C-type natriuretic peptide (CNP) is highly expressed in the central nervous system (CNS) and key to neuronal development; however, a broader role for CNP in the CNS remains unclear. To address this deficit, we investigated behavioral, sensory and motor abnormalities and blood-brain barrier (BBB) integrity in a unique mouse model with inducible, global deletion of CNP (gbCNP-/-). gbCNP-/- mice and wild-type littermates at 12 (young adult) and 65 (aged) weeks of age were investigated for changes in gait and motor coordination (CatWalk™ and rotarod tests), anxiety-like behavior (open field and elevated zero maze tests), and motor and sensory function (modified neurological severity score [mNSS] and primary SHIRPA screen). Vascular permeability was assessed in vivo (Miles assay) with complementary in vitro studies conducted in primary murine brain endothelial cells. Young adult gbCNP-/- mice had normal gait but reduced motor coordination, increased locomotor activity in the open field and elevated zero maze, and had a higher mNSS score. Aged gbCNP-/- animals developed recurrent spontaneous seizures and had impaired gait and wide-ranging motor and sensory dysfunction. Young adult and aged gbCNP-/- mice exhibited increased BBB permeability, which was partially restored in vitro by CNP administration. Cultured brain endothelial cells from gbCNP-/- mice had an abnormal ZO-1 protein distribution. These data suggest that lack of CNP in the CNS impairs tight junction protein arrangement and increases BBB permeability, which is associated with changes in locomotor activity, motor coordination and late-onset seizures.
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Affiliation(s)
- Cristina Perez-Ternero
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London, United Kingdom
| | - Patrick N. Pallier
- Centre for Neuroscience, Surgery and Trauma, Blizard Institute, Barts and The London School of Medicine and Dentistry, London, United Kingdom
| | - Jordi L. Tremoleda
- Centre for Neuroscience, Surgery and Trauma, Blizard Institute, Barts and The London School of Medicine and Dentistry, London, United Kingdom
| | - Alessio Delogu
- Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Cathy Fernandes
- Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom
- MRC Centre for Neurodevelopmental Disorders, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom
| | - Adina T. Michael-Titus
- Centre for Neuroscience, Surgery and Trauma, Blizard Institute, Barts and The London School of Medicine and Dentistry, London, United Kingdom
| | - Adrian J. Hobbs
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London, United Kingdom
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