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Vascular angiotensin II actions mediated by angiotensin II type 2 receptors

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Abstract

Angiotensin II (Ang II) is the major effector peptide of the renin-angiotensin system and acts at two major receptors known as Ang II type 1 receptor (AT1R) and Ang II type 2 receptor (AT2R). Increasingly, there is evidence suggesting that the AT2R counter-regulates the excitatory effects of AT1R stimulation. In this review, we have focused on pharmacodynamic and trophic components of AT2R with respect to vascular function, and put the current status of vascular AT2R research in the context of a potential role for this ATR subtype in the therapeutic effects of AT1R antagonists.

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References and Recommended Reading

  1. De Gasparo M, Catt KJ, Inagami I, et al.: International Union of Pharmacology. XXIII. The Angiotensin II Receptors. Pharmacol Rev 2000, 52:415–472.

    PubMed  Google Scholar 

  2. Carey RM, Jin XH, Siragy HM: Role of the angiotensin AT2 receptor in blood pressure regulation and therapeutic implications. Am J Hypertens 2001, 14:98S-102S.

    Article  PubMed  CAS  Google Scholar 

  3. Widdop RE, Jones ES, Hannan RE, Gaspari TA: Angiotensin AT2 receptors: cardiovascular hope or hype? Br J Pharmacol 2003, 140:809–824. This paper is a comprehensive review of the cardiovascular and growth-modulating effects of AT2R. In particular, there is a detailed analysis of the contrasting cardiovascular phenotypes of two different AT2R knockout strains, as well as a comparison of the possible contribution of AT2R to either acute or chronic AT1R blockade.

    Article  PubMed  CAS  Google Scholar 

  4. Kaschina E, Unger T: Angiotensin AT1/AT2 receptors: regulation, signalling and function. Blood Press 2003, 12:70–88.

    Article  PubMed  CAS  Google Scholar 

  5. Arima S, Endo Y, Yaoita H, et al.: Possible role of P-450 metabolite of arachidonic acid in vasodilator mechanism of angiotensin II type 2 receptor in the isolated microperfused rabbit afferent arteriole. J Clin Invest 1997, 100:2816–2823.

    PubMed  CAS  Google Scholar 

  6. Endo Y, Arima S, Yaoita H, et al.: Function of angiotensin II type 2 receptor in the postglomerular efferent arteriole. Kidney Int Suppl 1997, 63:S205-S207.

    PubMed  CAS  Google Scholar 

  7. Dimitropoulou C, White RE, Fuchs L, et al.: Angiotensin II relaxes microvessels via the AT(2) receptor and Ca(2+)-activated K(+) (BK(Ca)) channels. Hypertension 2001, 37:301–307.

    PubMed  CAS  Google Scholar 

  8. Katada J, Majima M: AT(2) receptor-dependent vasodilation is mediated by activation of vascular kinin generation under flow conditions. Br J Pharmacol 2002, 136:484–491.

    Article  PubMed  CAS  Google Scholar 

  9. Matrougui K, Loufrani L, Heymes C, et al.: Activation of AT(2) receptors by endogenous angiotensin II is involved in flowinduced dilation in rat resistance arteries. Hypertension 1999, 34:659–665.

    PubMed  CAS  Google Scholar 

  10. Widdop RE, Matrougui K, Levy BI, Henrion D: AT2 receptormediated relaxation is preserved after long-term AT1 receptor blockade. Hypertension 2002, 40:516–520. This study demonstrated that AT2R vasodilator function was highly reproducible and preserved during AT1R blockade, which leads to the hypothesis that AT2R stimulation contributes to the therapeutic effects of AT1R antagonists.

    Article  PubMed  CAS  Google Scholar 

  11. Henrion D, Kubis N, Levy BI: Physiological and pathophysiological functions of the AT(2) subtype receptor of angiotensin II: from large arteries to the microcirculation. Hypertension 2001, 38:1150–1157. This review systematically documents the vasomotor actions of AT2R stimulation in individual vascular beds.

    PubMed  CAS  Google Scholar 

  12. Touyz RM, Endemann D, He G, et al.: Role of AT2 receptors in angiotensin II-stimulated contraction of small mesenteric arteries in young SHR. Hypertension 1999, 33:366–372.

    PubMed  CAS  Google Scholar 

  13. Burrell JH, Lumbers ER: Angiotensin receptor subtypes in the uterine artery during ovine pregnancy. Eur J Pharmacol 1997, 330:257–267.

    Article  PubMed  CAS  Google Scholar 

  14. Nora EH, Munzenmaier DH, Hansen-Smith FM, et al.: Localization of the Ang II type 2 receptor in the microcirculation of skeletal muscle. Am J Physiol 1998, 275:H1395-H1403.

    PubMed  CAS  Google Scholar 

  15. Akishita M, Horiuchi M, Yamada H, et al.: Inflammation influences vascular remodeling through AT2 receptor expression and signaling. Physiol Genomics 2000, 2:13–20.

    PubMed  CAS  Google Scholar 

  16. Wu L, Iwai M, Nakagami H, et al.: Effect of angiotensin II type 1 receptor blockade on cardiac remodeling in angiotensin II type 2 receptor null mice. Arterioscler Thromb Vasc Biol 2002, 22:49–54.

    Article  PubMed  Google Scholar 

  17. Chang RS, Lotti VJ: Angiotensin receptor subtypes in rat, rabbit and monkey tissues: relative distribution and species dependency. Life Sci 1991, 49:1485–1490.

    Article  PubMed  CAS  Google Scholar 

  18. Viswanathan M, Tsutsumi K, Correa FM, Saavedra JM: Changes in expression of angiotensin receptor subtypes in the rat aorta during development. Biochem Biophys Res Commun 1991, 179:1361–1367.

    Article  PubMed  CAS  Google Scholar 

  19. Zhuo J, Dean R, MacGregor D, et al.: Presence of angiotensin II AT2 receptor binding sites in the adventitia of human kidney vasculature. Clin Exp Pharmacol Physiol Suppl 1996, 3:S147-S154.

    PubMed  CAS  Google Scholar 

  20. Hannan RE, Davis EA, Widdop RE: Functional role of angiotensin II AT2 receptor in modulation of AT1 receptormediated contraction in rat uterine artery: involvement of bradykinin and nitric oxide. Brit J Pharmacol 2003, 140:987–995.

    Article  CAS  Google Scholar 

  21. Siragy HM, Carey RM: The subtype-2 (AT2) angiotensin receptor regulates renal cyclic guanosine 3’, 5’-monophosphate and AT1 receptor-mediated prostaglandin E2 production in conscious rats. J Clin Invest 1996, 97:1978–1982.

    PubMed  CAS  Google Scholar 

  22. Siragy HM, Carey RM: The subtype 2 (AT2) angiotensin receptor mediates renal production of nitric oxide in conscious rats. J Clin Invest 1997, 100:264–269.

    PubMed  CAS  Google Scholar 

  23. Siragy HM, Carey RM: Protective role of the angiotensin AT2 receptor in a renal wrap hypertension model. Hypertension 1999, 33:1237–1242.

    PubMed  CAS  Google Scholar 

  24. Gohlke P, Pees C, Unger T: AT2 receptor stimulation increases aortic cyclic GMP in SHRSP by a kinin-dependent mechanism. Hypertension 1998, 31:349–355.

    PubMed  CAS  Google Scholar 

  25. Tsutsumi Y, Matsubara H, Masaki H, et al.: Angiotensin II type 2 receptor overexpression activates the vascular kinin system and causes vasodilation. J Clin Invest 1999, 104:925–935.

    PubMed  CAS  Google Scholar 

  26. Abadir PM, Carey RM, Siragy HM: Angiotensin AT2 receptors directly stimulate renal nitric oxide in bradykinin B2-receptornull mice. Hypertension 2003, 42:600–604.

    Article  PubMed  CAS  Google Scholar 

  27. Li XC, Widdop RE: AT2 receptor-mediated vasodilatation is unmasked by AT1 receptor blockade in conscious SHR. Br J Pharmacol 2003, In press. This study documented the regional hemodynamic effects of AT2R stimulation in conscious SHR, and describes a hemodynamic profile of generalized vasodilation that is distinct from AT1R blockade alone.

  28. Munzenmaier DH, Greene AS: Opposing actions of angiotensin II on microvascular growth and arterial blood pressure. Hypertension 1996, 27:760–765.

    PubMed  CAS  Google Scholar 

  29. Tea BS, Der Sarkissian S, Touyz RM, et al.: Proapoptotic and growth-inhibitory role of angiotensin II type 2 receptor in vascular smooth muscle cells of spontaneously hypertensive rats in vivo. Hypertension 2000, 35:1069–1073.

    PubMed  CAS  Google Scholar 

  30. Barber MN, Sampey DB, Widdop RE: AT(2) receptor stimulation enhances antihypertensive effect of AT(1) receptor antagonist in hypertensive rats. Hypertension 1999, 34:1112–1116.

    PubMed  CAS  Google Scholar 

  31. Carey RM, Howell NL, Jin XH, Siragy HM: Angiotensin type 2 receptor-mediated hypotension in angiotensin type-1 receptor-blocked rats. Hypertension 2001, 38:1272–1277.

    PubMed  CAS  Google Scholar 

  32. Schuijt MP, Basdew M, van Veghel R, et al.: AT(2) receptormediated vasodilation in the heart: effect of myocardial infarction. Am J Physiol 2001, 281:H2590-H2596.

    CAS  Google Scholar 

  33. Lambers DS, Greenberg SG, Clark KE: Functional role of angiotensin II type 1 and 2 receptors in regulation of uterine blood flow in nonpregnant sheep. Am J Physiol 2000, 278:H353-H359.

    CAS  Google Scholar 

  34. Bautista R, Sanchez A, Hernandez J, et al.: Angiotensin II type AT(2) receptor mRNA expression and renal vasodilatation are increased in renal failure. Hypertension 2001, 38:669–673.

    PubMed  CAS  Google Scholar 

  35. Li XC, Widdop RE: Angiotensin type 1 receptor antagonists CV-11974 and EXP 3174 cause selective renal vasodilatation in conscious spontaneously hypertensive rats. Clin Sci 1996, 91:147–154.

    PubMed  CAS  Google Scholar 

  36. Phoon S, Howes LG: Role of angiotensin type 2 receptors in human forearm vascular responses of normal volunteers. Clin Exp Pharmacol Physiol 2001, 28:734–736.

    Article  PubMed  CAS  Google Scholar 

  37. Phoon S, Howes LG: Forearm vasodilator response to angiotensin II in elderly women receiving candesartan: role of AT(2)-receptors. J Renin Angiotensin Aldosterone Syst 2002, 3:36–39.

    PubMed  CAS  Google Scholar 

  38. AbdAlla S, Lother H, Abdel-tawab AM, Quitterer U: The angiotensin II AT2 receptor is an AT1 receptor antagonist. J Biol Chem 2001, 276:39721–39726. In this paper, it is reported that the AT2R binds directly to the AT1R to form heterodimers in a ligand-independent manner and provocatively suggests that the AT2R can function as an AT1R antagonist.

    Article  PubMed  CAS  Google Scholar 

  39. Jin XQ, Fukuda N, Su JZ, et al.: Angiotensin II type 2 receptor gene transfer downregulates angiotensin II type 1a receptor in vascular smooth muscle cells. Hypertension 2002, 39:1021–1027.

    Article  PubMed  CAS  Google Scholar 

  40. Su JZ, Fukuda N, Jin XQ, et al.: Effect of AT2 receptor on expression of AT1 and TGF-beta receptors in VSMCs from SHR. Hypertension 2002, 40:853–858.

    Article  PubMed  CAS  Google Scholar 

  41. Duke LM, Eppel GA, Widdop RE, Evans RG: Disparate roles of AT2 receptors in the renal cortical and medullary circulations of anesthetized rabbits. Hypertension 2003, 42:200–205. This study demonstrates the opposing vascular effects of AT2R in the renal cortex versus renal medulla of rabbits; a novel action of AT2R to inhibit AT1R-mediated medullary vasodilation is described.

    Article  PubMed  CAS  Google Scholar 

  42. Paull JR, Li XC, Sampey DB, Widdop RE: Pharmacodynamic contribution to the vasodilator effect of chronic AT(1) receptor blockade in SHR. Hypertension 2001, 37:91–98.

    PubMed  CAS  Google Scholar 

  43. Senbonmatsu T, Ichihara S, Price E Jr, et al.: Evidence for angiotensin II type 2 receptor-mediated cardiac myocyte enlargement during in vivo pressure overload. J Clin Invest 2000, 106:R25-R29.

    PubMed  CAS  Google Scholar 

  44. Akishita M, Iwai M, Wu L, et al.: Inhibitory effect of angiotensin II type 2 receptor on coronary arterial remodeling after aortic banding in mice. Circulation 2000, 102:1684–1689.

    PubMed  CAS  Google Scholar 

  45. Kurisu S, Ozono R, Oshima T, et al.: Cardiac angiotensin II type 2 receptor activates the kinin/NO system and inhibits fibrosis. Hypertension 2003, 41:99–107.

    Article  PubMed  CAS  Google Scholar 

  46. Janiak P, Pillon A, Prost JF, Vilaine JP: Role of angiotensin subtype 2 receptor in neointima formation after vascular injury. Hypertension 1992, 20:737–745.

    PubMed  CAS  Google Scholar 

  47. Stoll M, Steckelings UM, Paul M, et al.: The angiotensin AT2-receptor mediates inhibition of cell proliferation in coronary endothelial cells. J Clin Invest 1995, 95:651–657.

    PubMed  CAS  Google Scholar 

  48. Nakajima M, Hutchinson HG, Fujinaga M, et al.: The angiotensin II type 2 (AT2) receptor antagonizes the growth effects of the AT1 receptor: gain-of-function study using gene transfer. Proc Natl Acad Sci U S A 1995, 92:10663–10667.

    Article  PubMed  CAS  Google Scholar 

  49. Ohkubo N, Matsubara H, Nozawa Y, et al.: Angiotensin type 2 receptors are reexpressed by cardiac fibroblasts from failing myopathic hamster hearts and inhibit cell growth and fibrillar collagen metabolism. Circulation 1997, 96:3954–3962.

    PubMed  CAS  Google Scholar 

  50. Tsutsumi Y, Matsubara H, Ohkubo N, et al.: Angiotensin II type 2 receptor is upregulated in human heart with interstitial fibrosis, and cardiac fibroblasts are the major cell type for its expression. Circ Res 1998, 83:1035–1046.

    PubMed  CAS  Google Scholar 

  51. Siragy HM, de Gasparo M, Carey RM: Angiotensin type 2 receptor mediates valsartan-induced hypotension in conscious rats. Hypertension 2000, 35:1074–1077.

    PubMed  CAS  Google Scholar 

  52. Liu YH, Yang XP, Sharov VG, et al.: Effects of angiotensinconverting enzyme inhibitors and angiotensin II type 1 receptor antagonists in rats with heart failure: role of kinins and angiotensin II type 2 receptors. J Clin Invest 1997, 99:1926–1935.

    Article  PubMed  CAS  Google Scholar 

  53. Varagic J, Susic D, Frohlich ED: Coronary hemodynamic and ventricular responses to angiotensin type 1 receptor inhibition in SHR: interaction with angiotensin type 2 receptors. Hypertension 2001, 37:1399–1403.

    PubMed  CAS  Google Scholar 

  54. Wu L, Iwai M, Nakagami H, et al.: Roles of angiotensin II type 2 receptor stimulation associated with selective angiotensin II type 1 receptor blockade with valsartan in the improvement of inflammation-induced vascular injury. Circulation 2001, 104:2716–2721.

    PubMed  CAS  Google Scholar 

  55. Xu J, Carretero OA, Liu YH: Role of AT2 receptors in the cardioprotective effect of AT1 antagonists in mice. Hypertension 2002, 40:244–250.

    Article  PubMed  CAS  Google Scholar 

  56. Opie LH, Sack MN: Enhanced angiotensin II activity in heart failure: reevaluation of the counterregulatory hypothesis of receptor subtypes. Circ Res 2001, 88:654–658.

    PubMed  CAS  Google Scholar 

  57. Siragy HM, El-Kersh MA, De nGasparo M, et al.: Differences in AT2-receptor stimulation between AT1-receptor blockers valsartan and losartan quantified by renal interstitial fluid cGMP. J Hypertens 2002, 20:1157–1163. This study illustrates that AT1R antagonists differentially stimulate cCMP production in the kidney of conscious rats via an AT2R-dependent mechanism, and suggests that not all AT1R antagonists are the same with respect to AT1/2R cross-talk.

    Article  PubMed  CAS  Google Scholar 

  58. Santos RA, Campagnole-Santos MJ, Andrade SP: Angiotensin-(1–7): an update. Regul Pept 2000, 91:45–62.

    Article  PubMed  CAS  Google Scholar 

  59. Santos RA, Simoes e Silva AC, Maric C, et al.: Angiotensin-(1–7) is an endogenous ligand for the G protein-coupled receptor Mas. Proc Natl Acad Sci U S A 2003, 100:8258–8263. This is a recent study providing evidence that identifies the G proteincoupled receptor Mas as a functional receptor for Ang-(1–y7).

    Article  PubMed  CAS  Google Scholar 

  60. Donoghue M, Hsieh F, Baronas E, et al.: A novel angiotensinconverting enzyme-related carboxypeptidase (ACE2) converts angiotensin I to angiotensin 1–9. Circ Res 2000, 87:E1-E9.

    PubMed  CAS  Google Scholar 

  61. Tipnis SR, Hooper NM, Hyde R, et al.: A human homolog of angiotensin-converting enzyme: cloning and functional expression as a captopril-insensitive carboxypeptidase. J Biol Chem 2000, 275:33238–33243.

    Article  PubMed  CAS  Google Scholar 

  62. Oudit GY, Crackower MA, Backx PH, Penninger JM: The role of ACE2 in cardiovascular physiology. Trends Cardiovasc Med 2003, 13:93–101.

    Article  PubMed  CAS  Google Scholar 

  63. Carey RM, Siragy HM: Newly recognized components of the renin-angiotensin system: potential roles in cardiovascular and renal regulation. Endocr Rev 2003, 24:261–271.

    Article  PubMed  CAS  Google Scholar 

  64. Brosnihan KB, Neves LA, Joyner J, et al.: Enhanced renal immunocytochemical expression of ANG-(1–7) and ACE2 during pregnancy. Hypertension 2003, 42:749–753.

    Article  PubMed  CAS  Google Scholar 

  65. Loot AE, Roks AJ, Henning RH, et al.: Angiotensin-(1–7) attenuates the development of heart failure after myocardial infarction in rats. Circulation 2002, 105:1548–1550.

    Article  PubMed  CAS  Google Scholar 

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Hannan, R.E., Widdop, R.E. Vascular angiotensin II actions mediated by angiotensin II type 2 receptors. Current Science Inc 6, 117–123 (2004). https://doi.org/10.1007/s11906-004-0086-5

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