Neutral endopeptidase 24.11 and dipeptidyl peptidase IV are both mediators of the degradation of glucagon-like peptide 1 in the anaesthetised pig

The incretin hormone glucagon-like peptide 1 (GLP-1) has antihyperglycaemic effects, but its therapeutic usefulness is limited by its metabolic instability. Dipeptidyl peptidase IV (DPP-IV) is established as the primary inactivating enzyme, but the roles of other enzymes remain unclear. The effect o...

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Veröffentlicht in:Diabetologia 2005-09, Vol.48 (9), p.1882-1890
Hauptverfasser: PLAMBOECK, A, HOIST, J. J, CARR, R. D, DEACON, C. F
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creator PLAMBOECK, A
HOIST, J. J
CARR, R. D
DEACON, C. F
description The incretin hormone glucagon-like peptide 1 (GLP-1) has antihyperglycaemic effects, but its therapeutic usefulness is limited by its metabolic instability. Dipeptidyl peptidase IV (DPP-IV) is established as the primary inactivating enzyme, but the roles of other enzymes remain unclear. The effect of candoxatril, a selective inhibitor of neutral endopeptidase (NEP) 24.11, on GLP-1 pharmacokinetics/pharmacodynamics with or without DPP-IV inhibition was examined in anaesthetised pigs. During GLP-1 infusion, candoxatril doubled C-terminal immunoreactivity, improving the pharmacokinetics (t(1/2) 2.3+/-0.1 to 8.8+/-1.2 min; metabolic clearance rate [MCR] 20.4+/-3.4 to 4.8+/-0.4 ml.kg(-1). min(-1); p
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J ; CARR, R. D ; DEACON, C. F</creator><creatorcontrib>PLAMBOECK, A ; HOIST, J. J ; CARR, R. D ; DEACON, C. F</creatorcontrib><description>The incretin hormone glucagon-like peptide 1 (GLP-1) has antihyperglycaemic effects, but its therapeutic usefulness is limited by its metabolic instability. Dipeptidyl peptidase IV (DPP-IV) is established as the primary inactivating enzyme, but the roles of other enzymes remain unclear. The effect of candoxatril, a selective inhibitor of neutral endopeptidase (NEP) 24.11, on GLP-1 pharmacokinetics/pharmacodynamics with or without DPP-IV inhibition was examined in anaesthetised pigs. During GLP-1 infusion, candoxatril doubled C-terminal immunoreactivity, improving the pharmacokinetics (t(1/2) 2.3+/-0.1 to 8.8+/-1.2 min; metabolic clearance rate [MCR] 20.4+/-3.4 to 4.8+/-0.4 ml.kg(-1). min(-1); p&lt;0.01), but had no effect upon intact GLP-1 (t(1/2) 1.4+/-0.1 to 1.6+/-0.1 min; MCR 47.9+/-8.0 to 38.8+/-5.0 ml.kg(-1).min(-1)). Insulin responses to intravenous glucose were unaffected by candoxatril, but glucose tolerance was improved (DeltaAUC(min 27-87) 118+/-5 to 74+/-14 min.mmol.l(-1); glucose elimination rate [k] 6.6+/-0.5 to 8.6+/-0.5%; p&lt;0.05). When candoxatril was co-administered with valine pyrrolidide (a DPP-IV inhibitor), changes in C-terminal GLP-1 pharmacokinetics mirrored those seen when candoxatril alone was administered (t(1/2) 2.7+/-0.3 and 7.7+/-0.8 min; MCR 17.3+/-2.6 and 6.5+/-0.8 ml.kg(-1).min(-1) for valine pyrrolidide without and with candoxatril, respectively). However, intact GLP-1 pharmacokinetics were improved (t(1/2) 2.8+/-0.3 and 7.5+/-0.6 min; MCR 18.3+/-0.6 and 9.4+/-0.9 ml.kg(-1).min(-1); p&lt;0.02), potentiating the antihyperglycaemic/insulinotropic effects of GLP-1 (glucose deltaAUC(min 27- 87) 103+/-8 to 62+/-14 min.mmol.l(-1); k 6.8+/-0.4 to 11.4+/-1.4%; insulin deltaAUC(min 27-87) 3,680+/-738 to 7,201+/-1,183 min.pmol.l(-1); p&lt;0.05). This study confirms a role for NEP-24.11 in GLP-1 metabolism in vivo, suggesting that up to 50% of GLP-1 entering the circulation may be degraded by NEP-24.11. Furthermore, combined inhibition of DPP-IV and NEP-24.11 is superior to DPP-IV inhibition alone in preserving intact GLP-1, which raises the possibility that the combination has therapeutic potential.</description><identifier>ISSN: 0012-186X</identifier><identifier>EISSN: 1432-0428</identifier><identifier>DOI: 10.1007/s00125-005-1847-7</identifier><identifier>PMID: 16025254</identifier><language>eng</language><publisher>Berlin: Springer</publisher><subject>Animals ; Antihypertensive Agents - pharmacology ; Area Under Curve ; Biological and medical sciences ; Diabetes ; Diabetes. Impaired glucose tolerance ; Dipeptidyl Peptidase 4 - metabolism ; Endocrine pancreas. Apud cells (diseases) ; Endocrinopathies ; Enzymes ; Etiopathogenesis. Screening. Investigations. 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J</creatorcontrib><creatorcontrib>CARR, R. D</creatorcontrib><creatorcontrib>DEACON, C. F</creatorcontrib><title>Neutral endopeptidase 24.11 and dipeptidyl peptidase IV are both mediators of the degradation of glucagon-like peptide 1 in the anaesthetised pig</title><title>Diabetologia</title><addtitle>Diabetologia</addtitle><description>The incretin hormone glucagon-like peptide 1 (GLP-1) has antihyperglycaemic effects, but its therapeutic usefulness is limited by its metabolic instability. Dipeptidyl peptidase IV (DPP-IV) is established as the primary inactivating enzyme, but the roles of other enzymes remain unclear. The effect of candoxatril, a selective inhibitor of neutral endopeptidase (NEP) 24.11, on GLP-1 pharmacokinetics/pharmacodynamics with or without DPP-IV inhibition was examined in anaesthetised pigs. During GLP-1 infusion, candoxatril doubled C-terminal immunoreactivity, improving the pharmacokinetics (t(1/2) 2.3+/-0.1 to 8.8+/-1.2 min; metabolic clearance rate [MCR] 20.4+/-3.4 to 4.8+/-0.4 ml.kg(-1). min(-1); p&lt;0.01), but had no effect upon intact GLP-1 (t(1/2) 1.4+/-0.1 to 1.6+/-0.1 min; MCR 47.9+/-8.0 to 38.8+/-5.0 ml.kg(-1).min(-1)). Insulin responses to intravenous glucose were unaffected by candoxatril, but glucose tolerance was improved (DeltaAUC(min 27-87) 118+/-5 to 74+/-14 min.mmol.l(-1); glucose elimination rate [k] 6.6+/-0.5 to 8.6+/-0.5%; p&lt;0.05). When candoxatril was co-administered with valine pyrrolidide (a DPP-IV inhibitor), changes in C-terminal GLP-1 pharmacokinetics mirrored those seen when candoxatril alone was administered (t(1/2) 2.7+/-0.3 and 7.7+/-0.8 min; MCR 17.3+/-2.6 and 6.5+/-0.8 ml.kg(-1).min(-1) for valine pyrrolidide without and with candoxatril, respectively). However, intact GLP-1 pharmacokinetics were improved (t(1/2) 2.8+/-0.3 and 7.5+/-0.6 min; MCR 18.3+/-0.6 and 9.4+/-0.9 ml.kg(-1).min(-1); p&lt;0.02), potentiating the antihyperglycaemic/insulinotropic effects of GLP-1 (glucose deltaAUC(min 27- 87) 103+/-8 to 62+/-14 min.mmol.l(-1); k 6.8+/-0.4 to 11.4+/-1.4%; insulin deltaAUC(min 27-87) 3,680+/-738 to 7,201+/-1,183 min.pmol.l(-1); p&lt;0.05). This study confirms a role for NEP-24.11 in GLP-1 metabolism in vivo, suggesting that up to 50% of GLP-1 entering the circulation may be degraded by NEP-24.11. Furthermore, combined inhibition of DPP-IV and NEP-24.11 is superior to DPP-IV inhibition alone in preserving intact GLP-1, which raises the possibility that the combination has therapeutic potential.</description><subject>Animals</subject><subject>Antihypertensive Agents - pharmacology</subject><subject>Area Under Curve</subject><subject>Biological and medical sciences</subject><subject>Diabetes</subject><subject>Diabetes. 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J</au><au>CARR, R. D</au><au>DEACON, C. F</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Neutral endopeptidase 24.11 and dipeptidyl peptidase IV are both mediators of the degradation of glucagon-like peptide 1 in the anaesthetised pig</atitle><jtitle>Diabetologia</jtitle><addtitle>Diabetologia</addtitle><date>2005-09-01</date><risdate>2005</risdate><volume>48</volume><issue>9</issue><spage>1882</spage><epage>1890</epage><pages>1882-1890</pages><issn>0012-186X</issn><eissn>1432-0428</eissn><abstract>The incretin hormone glucagon-like peptide 1 (GLP-1) has antihyperglycaemic effects, but its therapeutic usefulness is limited by its metabolic instability. Dipeptidyl peptidase IV (DPP-IV) is established as the primary inactivating enzyme, but the roles of other enzymes remain unclear. The effect of candoxatril, a selective inhibitor of neutral endopeptidase (NEP) 24.11, on GLP-1 pharmacokinetics/pharmacodynamics with or without DPP-IV inhibition was examined in anaesthetised pigs. During GLP-1 infusion, candoxatril doubled C-terminal immunoreactivity, improving the pharmacokinetics (t(1/2) 2.3+/-0.1 to 8.8+/-1.2 min; metabolic clearance rate [MCR] 20.4+/-3.4 to 4.8+/-0.4 ml.kg(-1). min(-1); p&lt;0.01), but had no effect upon intact GLP-1 (t(1/2) 1.4+/-0.1 to 1.6+/-0.1 min; MCR 47.9+/-8.0 to 38.8+/-5.0 ml.kg(-1).min(-1)). Insulin responses to intravenous glucose were unaffected by candoxatril, but glucose tolerance was improved (DeltaAUC(min 27-87) 118+/-5 to 74+/-14 min.mmol.l(-1); glucose elimination rate [k] 6.6+/-0.5 to 8.6+/-0.5%; p&lt;0.05). When candoxatril was co-administered with valine pyrrolidide (a DPP-IV inhibitor), changes in C-terminal GLP-1 pharmacokinetics mirrored those seen when candoxatril alone was administered (t(1/2) 2.7+/-0.3 and 7.7+/-0.8 min; MCR 17.3+/-2.6 and 6.5+/-0.8 ml.kg(-1).min(-1) for valine pyrrolidide without and with candoxatril, respectively). However, intact GLP-1 pharmacokinetics were improved (t(1/2) 2.8+/-0.3 and 7.5+/-0.6 min; MCR 18.3+/-0.6 and 9.4+/-0.9 ml.kg(-1).min(-1); p&lt;0.02), potentiating the antihyperglycaemic/insulinotropic effects of GLP-1 (glucose deltaAUC(min 27- 87) 103+/-8 to 62+/-14 min.mmol.l(-1); k 6.8+/-0.4 to 11.4+/-1.4%; insulin deltaAUC(min 27-87) 3,680+/-738 to 7,201+/-1,183 min.pmol.l(-1); p&lt;0.05). This study confirms a role for NEP-24.11 in GLP-1 metabolism in vivo, suggesting that up to 50% of GLP-1 entering the circulation may be degraded by NEP-24.11. Furthermore, combined inhibition of DPP-IV and NEP-24.11 is superior to DPP-IV inhibition alone in preserving intact GLP-1, which raises the possibility that the combination has therapeutic potential.</abstract><cop>Berlin</cop><pub>Springer</pub><pmid>16025254</pmid><doi>10.1007/s00125-005-1847-7</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record>
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subjects Animals
Antihypertensive Agents - pharmacology
Area Under Curve
Biological and medical sciences
Diabetes
Diabetes. Impaired glucose tolerance
Dipeptidyl Peptidase 4 - metabolism
Endocrine pancreas. Apud cells (diseases)
Endocrinopathies
Enzymes
Etiopathogenesis. Screening. Investigations. Target tissue resistance
Glucagon
Glucagon - blood
Glucose
Hogs
Indans - pharmacology
Insulin - blood
Medical sciences
Metabolic Clearance Rate
Metabolism
Models, Animal
Neprilysin - metabolism
Pharmacokinetics
Physiology
Polypeptides
Propionates - pharmacology
Swine
title Neutral endopeptidase 24.11 and dipeptidyl peptidase IV are both mediators of the degradation of glucagon-like peptide 1 in the anaesthetised pig
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