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Factor XII Plasma Prekallikrein Plasma kallikrein HMW  Kininogen Bradykinin Kininases (ACE) Inactive  Fragments LMW  Kininogen Kallidin Tissue kallikrein Tissue Prekallikrein Negatively charged particle glass, LPS, collagen Clotting/fibrinolysis pathway Biological effect thru B2 receptor mainly Plasmin by liver by exocrine  glands Factor XIIa Trypsin by liver www.freelivedoctor.com
Kinins ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],www.freelivedoctor.com
Role in the Kidney – Control of Na Excretion BN-Ki BN-Ka BN-Ki BN-Ka www.freelivedoctor.com
○  BN-Kitasoco ●  BN-Katholiek Influence of NaCl load on systolic BP in 2 strains of rats Influence of various  Na diets at week 7 Influence of 2% NaCl  diet from 7-11 weeks www.freelivedoctor.com
www.freelivedoctor.com
www.freelivedoctor.com
Ebelactone B Ebelactone B Systolic Blood  Pressure (mmHg) Age (weeks) Age (weeks) BN-Ki BN-Kath Veh EbelB www.freelivedoctor.com
Kinins ACE Degradation ACE Inhibitor B2 Icatibant IP 3 ↑   Ca ++ PLA 2 PGI 2 L-arginine NO ↑ cAMP AC GC ↑ cGMP Relaxation Anti-ischemic Anti-proliferative Anti-atherosclerotic + Smooth muscle cell Endothelial cell www.freelivedoctor.com
Blood Pressure (mmHg) LV Weight (mg/100gBW) R2 R1 V C R1 +H R2 +H R2 R1 V C R1 +H R2 +H Effect of orally administered ramipril and coadministration of HOE 140 (BK antagonist) on mean BP and LVW in rats with aortic banding C: sham operation V: control + vehicle R1: ramipril 1 mg/kg R1+H: Ramipril 1mg + HOE 140 R2: ramipril 10 µg/kg R2+H: Ramipril 10µg + HOE 140 www.freelivedoctor.com
Saline Losartan Ramipril + HOE 140 Ramipril www.freelivedoctor.com
Neointimal/Total artery Area (%) Saline  Losartan  HOE 140  Ramipril  Ramipril  + HOE 140 Effect of various treatments on neointima formation  in the carotid artery 2 weeks after  balloon injury www.freelivedoctor.com
Effect of various treatments on neointima formation  in the carotid artery 2 weeks after  balloon injury Saline L-NAME Ramipril Ramipril  + L-NAME Neointimal area/Total artery area % *  # +  # * P<0.05 vs Saline;  +:P<0.05 vs. Ramipril; #: P<0.05 vs. L-NAME www.freelivedoctor.com
www.freelivedoctor.com
www.freelivedoctor.com
LVP LV  dP/dt HR CF LDH CPK Lactate Lactate Glycogen ATP CP Bradykinin Ramiprilat % Change vs. Control Cardiodynamic Venous Effluent Myocardial tissue www.freelivedoctor.com
LVP LV  dP/dt HR CF LDH CPK Lactate Lactate Glycogen ATP CP Cardiodynamic Venous Effluent Myocardial tissue Ramipril Ramipril + Icatibant Reversal by Kinin Antagonist of  Cardioprotective Effect of ACE Inhibitor www.freelivedoctor.com
Control PC PC+Icat. Icat. BK+Icat. BK Role of Bradykinin in the cardioprotective effects of Ischemic preconditioning on myocardial infarct size in the rabbit. PC: 5 min occlusion followed by 10 min reperfusion followed by 30 min occlusion. Similar protection achieved with exogenous BK. Infarct Size www.freelivedoctor.com
Infarct Size Heart:Body Weight Ratio Moexepril Effect of Chronic Treatment with Moexipril±Icatibant  and Losartan on Infarct Size and Cardiac Mass  Moexepril +Icatibant Losartan Moexepril Moexepril +Icatibant Losartan www.freelivedoctor.com
HOE 140 Enalapril Control Enalapril HOE 140 HOE/Enal mg/day Urinary Albumin Excretion Rate in Diabetic Rats www.freelivedoctor.com
ACE Inhibitor AII Receptor Blocker Blocks formation of AII incompletely Blocks Kininase II ↑   Kinins ↓   AII effects  & aldosterone PROTECTION Blocks  AT-1R AT-2R Free More complete Inhibition  of AII effects Preserve  Anti- proliferative effect www.freelivedoctor.com
Potential Uses of Kinin Antagonists ,[object Object],[object Object],[object Object],[object Object],[object Object],www.freelivedoctor.com

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Kinins

  • 1. Factor XII Plasma Prekallikrein Plasma kallikrein HMW Kininogen Bradykinin Kininases (ACE) Inactive Fragments LMW Kininogen Kallidin Tissue kallikrein Tissue Prekallikrein Negatively charged particle glass, LPS, collagen Clotting/fibrinolysis pathway Biological effect thru B2 receptor mainly Plasmin by liver by exocrine glands Factor XIIa Trypsin by liver www.freelivedoctor.com
  • 2.
  • 3. Role in the Kidney – Control of Na Excretion BN-Ki BN-Ka BN-Ki BN-Ka www.freelivedoctor.com
  • 4. ○ BN-Kitasoco ● BN-Katholiek Influence of NaCl load on systolic BP in 2 strains of rats Influence of various Na diets at week 7 Influence of 2% NaCl diet from 7-11 weeks www.freelivedoctor.com
  • 7. Ebelactone B Ebelactone B Systolic Blood Pressure (mmHg) Age (weeks) Age (weeks) BN-Ki BN-Kath Veh EbelB www.freelivedoctor.com
  • 8. Kinins ACE Degradation ACE Inhibitor B2 Icatibant IP 3 ↑ Ca ++ PLA 2 PGI 2 L-arginine NO ↑ cAMP AC GC ↑ cGMP Relaxation Anti-ischemic Anti-proliferative Anti-atherosclerotic + Smooth muscle cell Endothelial cell www.freelivedoctor.com
  • 9. Blood Pressure (mmHg) LV Weight (mg/100gBW) R2 R1 V C R1 +H R2 +H R2 R1 V C R1 +H R2 +H Effect of orally administered ramipril and coadministration of HOE 140 (BK antagonist) on mean BP and LVW in rats with aortic banding C: sham operation V: control + vehicle R1: ramipril 1 mg/kg R1+H: Ramipril 1mg + HOE 140 R2: ramipril 10 µg/kg R2+H: Ramipril 10µg + HOE 140 www.freelivedoctor.com
  • 10. Saline Losartan Ramipril + HOE 140 Ramipril www.freelivedoctor.com
  • 11. Neointimal/Total artery Area (%) Saline Losartan HOE 140 Ramipril Ramipril + HOE 140 Effect of various treatments on neointima formation in the carotid artery 2 weeks after balloon injury www.freelivedoctor.com
  • 12. Effect of various treatments on neointima formation in the carotid artery 2 weeks after balloon injury Saline L-NAME Ramipril Ramipril + L-NAME Neointimal area/Total artery area % * # + # * P<0.05 vs Saline; +:P<0.05 vs. Ramipril; #: P<0.05 vs. L-NAME www.freelivedoctor.com
  • 15. LVP LV dP/dt HR CF LDH CPK Lactate Lactate Glycogen ATP CP Bradykinin Ramiprilat % Change vs. Control Cardiodynamic Venous Effluent Myocardial tissue www.freelivedoctor.com
  • 16. LVP LV dP/dt HR CF LDH CPK Lactate Lactate Glycogen ATP CP Cardiodynamic Venous Effluent Myocardial tissue Ramipril Ramipril + Icatibant Reversal by Kinin Antagonist of Cardioprotective Effect of ACE Inhibitor www.freelivedoctor.com
  • 17. Control PC PC+Icat. Icat. BK+Icat. BK Role of Bradykinin in the cardioprotective effects of Ischemic preconditioning on myocardial infarct size in the rabbit. PC: 5 min occlusion followed by 10 min reperfusion followed by 30 min occlusion. Similar protection achieved with exogenous BK. Infarct Size www.freelivedoctor.com
  • 18. Infarct Size Heart:Body Weight Ratio Moexepril Effect of Chronic Treatment with Moexipril±Icatibant and Losartan on Infarct Size and Cardiac Mass Moexepril +Icatibant Losartan Moexepril Moexepril +Icatibant Losartan www.freelivedoctor.com
  • 19. HOE 140 Enalapril Control Enalapril HOE 140 HOE/Enal mg/day Urinary Albumin Excretion Rate in Diabetic Rats www.freelivedoctor.com
  • 20. ACE Inhibitor AII Receptor Blocker Blocks formation of AII incompletely Blocks Kininase II ↑ Kinins ↓ AII effects & aldosterone PROTECTION Blocks AT-1R AT-2R Free More complete Inhibition of AII effects Preserve Anti- proliferative effect www.freelivedoctor.com
  • 21.