Paul Simpson, MD

Prof In Residence

I am a clinical cardiologist at the San Francisco VA Medical Center treating inpatients and outpatients with heart disease since 1978. I also direct a lab at the VA, with a main goal to discover new drugs to treat heart failure, a major problem in cardiology. The lab has pursued initial findings from the early 1980s to the present, identifying a subclass of receptors for adrenaline as potential targets for a heart failure drug. Efforts in the lab are directed to this new drug, as well as discovering novel aspects of the class of adrenaline receptors. The lab has been funded continuously by the NIH and the VA, with additional important contribution from the AHA.

Education
Clinical Fellow, 1977 - Cardiology, Mass General Hospital
Resident, 1975 - Medicine, University of California
Research Fellow, 1974 - Neurobiology, NIH, NHLBI
Resident, 1972 - Medicine, Mass General Hospital
MD, 1970 - Medicine, Washington Univ School of Medicine
BS, 1966 - Biology & Psychology, Davidson College
Publications

  1. Lefton KB, Wu Y, Yen A, Okuda T, Zhang Y, Dai Y, Walsh S, Manno R, Dougherty JD, Samineni VK, Simpson PC, Papouin T. Norepinephrine Signals Through Astrocytes To Modulate Synapses. bioRxiv : the preprint server for biology 2024. PMID: 38826209


  2. Sandroni PB, Schroder MA, Hawkins HT, Bailon JD, Huang W, Hagen JT, Montgomery M, Hong SJ, Chin AL, Zhang J, Rodrigo MC, Kim B, Simpson PC, Schisler JC, Ellis JM, Fisher-Wellman KH, Jensen BC. The alpha-1A adrenergic receptor regulates mitochondrial oxidative metabolism in the mouse heart. Journal of molecular and cellular cardiology 2024. PMID: 38331556


  3. Zhang J, Sandroni PB, Huang W, Gao X, Oswalt L, Schroder MA, Lee S, Shih YI, Huang HS, Swigart PM, Myagmar BE, Simpson PC, Rossi JS, Schisler JC, Jensen BC. Cardiomyocyte Alpha-1A Adrenergic Receptors Mitigate Postinfarct Remodeling and Mortality by Constraining Necroptosis. JACC. Basic to translational science 2023. PMID: 38362342


  4. Reitman ME, Tse V, Mi X, Willoughby DD, Peinado A, Aivazidis A, Myagmar BE, Simpson PC, Bayraktar OA, Yu G, Poskanzer KE. Norepinephrine links astrocytic activity to regulation of cortical state. Nature neuroscience 2023. PMID: 36997759


  5. Zhang J, Simpson PC, Jensen B. Cardiac alpha-1A-adrenergic receptors: emerging protective roles in cardiovascular diseases. American journal of physiology. Heart and circulatory physiology 2020. PMID: 33275531


  6. Myagmar BE, Ismaili T, Swigart P, Raghunathan A, Baker AJ, Sahdeo S, Blevitt JM, Milla ME, Simpson PC. Coupling to Gq Signaling Is Required for Cardioprotection by an Alpha-1A-Adrenergic Receptor Agonist. Circulation research 2019. PMID: 31426700


  7. Cowley PM, Wang G, Swigart PM, Raghunathan A, Reddy NP, Dulam P, Lovett DH, Simpson PC, Baker AJ. Reversal of Right Ventricular failure by Chronic α1A-Subtype Adrenergic Agonist Therapy. American journal of physiology. Heart and circulatory physiology 2018. PMID: 30412439


  8. Yeh CC, Fan Y, Xu Y, Yang YL, Simpson PC, Mann MJ. Shift toward greater pathologic post-myocardial infarction remodeling with loss of the adaptive hypertrophic signaling of alpha1 adrenergic receptors in mice. PloS one 2017. PMID: 29216197


  9. López JE, Jaradeh K, Silva E, Aminololama-Shakeri S, Simpson PC. A method to increase reproducibility in adult ventricular myocyte sizing and flow cytometry: Avoiding cell size bias in single cell preparations. PloS one 2017. PMID: 29084228


  10. Cowley PM, Wang G, Joshi S, Swigart PM, Lovett DH, Simpson PC, Baker AJ. a1A-Subtype adrenergic agonist therapy for the failing right ventricle. Volume 313 of Issue 6. American journal of physiology. Heart and circulatory physiology 2017. PMID: 28822963


  11. López JE, Sharma J, Avila J, Wood TS, VanDyke JE, McLaughlin B, Abbey CK, Wong A, Myagmar BE, Swigart PM, Simpson PC, Chiamvimonvat N. Novel large-particle FACS purification of adult ventricular myocytes reveals accumulation of myosin and actin disproportionate to cell size and proteome in normal post-weaning development. Journal of molecular and cellular cardiology 2017. PMID: 28780067


  12. Simpson PC, Myagmar BE, Swigart PM, Melov S, Baker AJ. Response by Simpson et al to Letter Regarding Article, "Adrenergic Receptors in Individual Ventricular Myocytes: the Beta-1 and Alpha-1B Are in All Cells, the Alpha-1A Is in a Subpopulation, and the Beta-2 and Beta-3 Are Mostly Absent". Circulation research 2017. PMID: 28596177


  13. Myagmar BE, Flynn JM, Cowley PM, Swigart PM, Montgomery MD, Thai K, Nair D, Gupta R, Deng DX, Hosoda C, Melov S, Baker AJ, Simpson PC. Adrenergic Receptors in Individual Ventricular Myocytes: The Beta-1 and Alpha-1B Are in All Cells, the Alpha-1A Is in a Subpopulation, and the Beta-2 and Beta-3 Are Mostly Absent. Circulation research 2017. PMID: 28219977


  14. Beak J, Huang W, Parker JS, Hicks ST, Patterson C, Simpson PC, Ma A, Jin J, Jensen BC. An Oral Selective Alpha-1A Adrenergic Receptor Agonist Prevents Doxorubicin Cardiotoxicity. JACC. Basic to translational science 2017. PMID: 28286875


  15. Montgomery MD, Chan T, Swigart PM, Myagmar BE, Dash R, Simpson PC. An Alpha-1A Adrenergic Receptor Agonist Prevents Acute Doxorubicin Cardiomyopathy in Male Mice. PloS one 2017. PMID: 28081170


  16. Willis MS, Ilaiwy A, Montgomery MD, Simpson PC, Jensen BC. The alpha-1A adrenergic receptor agonist A61603 reduces cardiac polyunsaturated fatty acid and endocannabinoid metabolites associated with inflammation in vivo. Metabolomics : Official journal of the Metabolomic Society 2016. PMID: 28533737


  17. Thomas RC, Cowley PM, Singh A, Myagmar BE, Swigart PM, Baker AJ, Simpson PC. The Alpha-1A Adrenergic Receptor in the Rabbit Heart. PloS one 2016. PMID: 27258143


  18. Thomas RC, Singh A, Cowley P, Myagmar BE, Montgomery MD, Swigart PM, De Marco T, Baker AJ, Simpson PC. A Myocardial Slice Culture Model Reveals Alpha-1A-Adrenergic Receptor Signaling in the Human Heart. JACC. Basic to translational science 2016. PMID: 27453955


  19. Simpson PC. A New Pathway for Sympathetic Cardioprotection in Heart Failure. Circulation research 2015. PMID: 26358108


  20. Cowley PM, Wang G, Chang AN, Makwana O, Swigart PM, Lovett DH, Stull JT, Simpson PC, Baker AJ. The a1A-adrenergic receptor subtype mediates increased contraction of failing right ventricular myocardium. Volume 309 of Issue 5. American journal of physiology. Heart and circulatory physiology 2015. PMID: 26116709


  21. Shimkunas R, Makwana O, Spaulding K, Bazargan M, Khazalpour M, Takaba K, Soleimani M, Myagmar BE, Lovett DH, Simpson PC, Ratcliffe MB, Baker AJ. Myofilament dysfunction contributes to impaired myocardial contraction in the infarct border zone. Volume 307 of Issue 8. American journal of physiology. Heart and circulatory physiology 2014. PMID: 25128171


  22. Jensen BC, O'Connell TD, Simpson PC. Alpha-1-adrenergic receptors in heart failure: the adaptive arm of the cardiac response to chronic catecholamine stimulation. Journal of cardiovascular pharmacology 2014. PMID: 24145181


  23. O'Connell TD, Jensen BC, Baker AJ, Simpson PC. Cardiac alpha1-adrenergic receptors: novel aspects of expression, signaling mechanisms, physiologic function, and clinical importance. Pharmacological reviews 2013. PMID: 24368739


  24. Chu C, Thai K, Park KW, Wang P, Makwana O, Lovett DH, Simpson PC, Baker AJ. Intraventricular and interventricular cellular heterogeneity of inotropic responses to a(1)-adrenergic stimulation. Volume 304 of Issue 7. American journal of physiology. Heart and circulatory physiology 2013. PMID: 23355341


  25. Lam J, Simpson PC, Yang PC, Dash R. Synthesis of an in vivo MRI-detectable apoptosis probe. Journal of visualized experiments : JoVE 2012. PMID: 22871963


  26. May D, Blow MJ, Kaplan T, McCulley DJ, Jensen BC, Akiyama JA, Holt A, Plajzer-Frick I, Shoukry M, Wright C, Afzal V, Simpson PC, Rubin EM, Black BL, Bristow J, Pennacchio LA, Visel A. Large-scale discovery of enhancers from human heart tissue. Nature genetics 2011. PMID: 22138689


  27. Simpson PC. Where are the new drugs to treat heart failure? Introduction to the special issue on "key signaling molecules in hypertrophy and heart failure". Journal of molecular and cellular cardiology 2011. PMID: 21851824


  28. Doze VA, Papay RS, Goldenstein BL, Gupta MK, Collette KM, Nelson BW, Lyons MJ, Davis BA, Luger EJ, Wood SG, Haselton JR, Simpson PC, Perez DM. Long-term a1A-adrenergic receptor stimulation improves synaptic plasticity, cognitive function, mood, and longevity. Molecular pharmacology 2011. PMID: 21791575


  29. López JE, Myagmar BE, Swigart PM, Montgomery MD, Haynam S, Bigos M, Rodrigo MC, Simpson PC. ß-myosin heavy chain is induced by pressure overload in a minor subpopulation of smaller mouse cardiac myocytes. Circulation research 2011. PMID: 21778428


  30. Dash R, Chung J, Chan T, Yamada M, Barral J, Nishimura D, Yang PC, Simpson PC. A molecular MRI probe to detect treatment of cardiac apoptosis in vivo. Magnetic resonance in medicine 2011. PMID: 21360750


  31. Jensen BC, O'Connell TD, Simpson PC. Alpha-1-adrenergic receptors: targets for agonist drugs to treat heart failure. Journal of molecular and cellular cardiology 2010. PMID: 21118696


  32. Jensen BC, Swigart PM, Montgomery MD, Simpson PC. Functional alpha-1B adrenergic receptors on human epicardial coronary artery endothelial cells. Naunyn-Schmiedeberg's archives of pharmacology 2010. PMID: 20857090


  33. Nigam V, Sievers HH, Jensen BC, Sier HA, Simpson PC, Srivastava D, Mohamed SA. Altered microRNAs in bicuspid aortic valve: a comparison between stenotic and insufficient valves. The Journal of heart valve disease 2010. PMID: 20845893


  34. Yeh CC, Li H, Malhotra D, Turcato S, Nicholas S, Tu R, Zhu BQ, Cha J, Swigart PM, Myagmar BE, Baker AJ, Simpson PC, Mann MJ. Distinctive ERK and p38 signaling in remote and infarcted myocardium during post-MI remodeling in the mouse. Journal of cellular biochemistry 2010. PMID: 20186881


  35. Smyth JW, Hong TT, Gao D, Vogan JM, Jensen BC, Fong TS, Simpson PC, Stainier DY, Chi NC, Shaw RM. Limited forward trafficking of connexin 43 reduces cell-cell coupling in stressed human and mouse myocardium. The Journal of clinical investigation 2009. PMID: 20038810


  36. Wang GY, Yeh CC, Jensen BC, Mann MJ, Simpson PC, Baker AJ. Heart failure switches the RV alpha1-adrenergic inotropic response from negative to positive. American journal of physiology. Heart and circulatory physiology 2009. PMID: 20035030


  37. Methven L, Simpson PC, McGrath JC. Alpha1A/B-knockout mice explain the native alpha1D-adrenoceptor's role in vasoconstriction and show that its location is independent of the other alpha1-subtypes. British journal of pharmacology 2009. PMID: 19888965


  38. Jensen BC, Swigart PM, Laden ME, DeMarco T, Hoopes C, Simpson PC. The alpha-1D Is the predominant alpha-1-adrenergic receptor subtype in human epicardial coronary arteries. Journal of the American College of Cardiology 2009. PMID: 19761933


  39. Jensen BC, Swigart PM, De Marco T, Hoopes C, Simpson PC. {alpha}1-Adrenergic receptor subtypes in nonfailing and failing human myocardium. Circulation. Heart failure 2009. PMID: 19919991


  40. Jensen BC, Swigart PM, Simpson PC. Ten commercial antibodies for alpha-1-adrenergic receptor subtypes are nonspecific. Naunyn-Schmiedeberg's archives of pharmacology 2008. PMID: 18989658


  41. Muramatsu I, Morishima S, Suzuki F, Yoshiki H, Anisuzzaman AS, Tanaka T, Rodrigo MC, Myagmar BE, Simpson PC. Identification of alpha 1L-adrenoceptor in mice and its abolition by alpha 1A-adrenoceptor gene knockout. British journal of pharmacology 2008. PMID: 18806813


  42. Bao X, Lu CM, Liu F, Gu Y, Dalton ND, Zhu BQ, Foster E, Chen J, Karliner JS, Ross J, Simpson PC, Ziegler MG. Epinephrine is required for normal cardiovascular responses to stress in the phenylethanolamine N-methyltransferase knockout mouse. Circulation 2007. PMID: 17698731


  43. Hosoda C, Hiroyama M, Sanbe A, Birumachi J, Kitamura T, Cotecchia S, Simpson PC, Tsujimoto G, Tanoue A. Blockade of both alpha1A- and alpha1B-adrenergic receptor subtype signaling is required to inhibit neointimal formation in the mouse femoral artery. American journal of physiology. Heart and circulatory physiology 2007. PMID: 17384126


  44. Huang Y, Wright CD, Merkwan CL, Baye NL, Liang Q, Simpson PC, O'Connell TD. An alpha1A-adrenergic-extracellular signal-regulated kinase survival signaling pathway in cardiac myocytes. Circulation 2007. PMID: 17283256


  45. O'Connell TD, Rodrigo MC, Simpson PC. Isolation and culture of adult mouse cardiac myocytes. Methods in molecular biology (Clifton, N.J.) 2007. PMID: 17172694


  46. Joho S, Ishizaka S, Sievers R, Foster E, Simpson PC, Grossman W. Left ventricular pressure-volume relationship in conscious mice. Volume 292 of Issue 1. American journal of physiology. Heart and circulatory physiology 2006. PMID: 16905597


  47. Papay R, Gaivin R, Jha A, McCune DF, McGrath JC, Rodrigo MC, Simpson PC, Doze VA, Perez DM. Localization of the mouse alpha1A-adrenergic receptor (AR) in the brain: alpha1AAR is expressed in neurons, GABAergic interneurons, and NG2 oligodendrocyte progenitors. The Journal of comparative neurology 2006. PMID: 16705673


  48. Wang GY, McCloskey DT, Turcato S, Swigart PM, Simpson PC, Baker AJ. Contrasting inotropic responses to alpha1-adrenergic receptor stimulation in left versus right ventricular myocardium. American journal of physiology. Heart and circulatory physiology 2006. PMID: 16731650


  49. O'Connell TD, Swigart PM, Rodrigo MC, Ishizaka S, Joho S, Turnbull L, Tecott LH, Baker AJ, Foster E, Grossman W, Simpson PC. Alpha1-adrenergic receptors prevent a maladaptive cardiac response to pressure overload. Volume 116 of Issue 4. The Journal of clinical investigation 2006. PMID: 16585965


  50. Turcato S, Turnbull L, Wang GY, Honbo N, Simpson PC, Karliner JS, Baker AJ. Ischemic preconditioning depends on age and gender. Basic research in cardiology 2006. PMID: 16450074


  51. Turnbull L, Zhou HZ, Swigart PM, Turcato S, Karliner JS, Conklin BR, Simpson PC, Baker AJ. Sustained preconditioning induced by cardiac transgenesis with the tetracycline transactivator. Volume 290 of Issue 3. American journal of physiology. Heart and circulatory physiology 2005. PMID: 16243914


  52. Wang GY, Bergman MR, Nguyen AP, Turcato S, Swigart PM, Rodrigo MC, Simpson PC, Karliner JS, Lovett DH, Baker AJ. Cardiac transgenic matrix metalloproteinase-2 expression directly induces impaired contractility. Volume 69 of Issue 3. Cardiovascular research 2005. PMID: 16183043


  53. Rorabaugh BR, Gaivin RJ, Papay RS, Shi T, Simpson PC, Perez DM. Both alpha(1A)- and alpha(1B)-adrenergic receptors crosstalk to down regulate beta(1)-ARs in mouse heart: coupling to differential PTX-sensitive pathways. Journal of molecular and cellular cardiology 2005. PMID: 16171811


  54. McCloskey DT, Turnbull L, Swigart PM, Zambon AC, Turcato S, Joho S, Grossman W, Conklin BR, Simpson PC, Baker AJ. Cardiac transgenesis with the tetracycline transactivator changes myocardial function and gene expression. Volume 22 of Issue 1. Physiological genomics 2005. PMID: 15797971


  55. Rorabaugh BR, Ross SA, Gaivin RJ, Papay RS, McCune DF, Simpson PC, Perez DM. alpha1A- but not alpha1B-adrenergic receptors precondition the ischemic heart by a staurosporine-sensitive, chelerythrine-insensitive mechanism. Cardiovascular research 2005. PMID: 15639483


  56. Okoshi MP, Yan X, Okoshi K, Nakayama M, Schuldt AJ, O'Connell TD, Simpson PC, Lorell BH. Aldosterone directly stimulates cardiac myocyte hypertrophy. Journal of cardiac failure 2004. PMID: 15599842


  57. Ishizaka S, Sievers RE, Zhu BQ, Rodrigo MC, Joho S, Foster E, Simpson PC, Grossman W. New technique for measurement of left ventricular pressure in conscious mice. Volume 286 of Issue 3. American journal of physiology. Heart and circulatory physiology 2003. PMID: 14563661


  58. McCloskey DT, Turnbull L, Swigart P, O'Connell TD, Simpson PC, Baker AJ. Abnormal myocardial contraction in alpha(1A)- and alpha(1B)-adrenoceptor double-knockout mice. Journal of molecular and cellular cardiology 2003. PMID: 14519431


  59. Rapp JH, Pan XM, Yu B, Swanson RA, Higashida RT, Simpson P, Saloner D. Cerebral ischemia and infarction from atheroemboli <100 microm in Size. Stroke 2003. PMID: 12855822


  60. O'Connell TD, Ishizaka S, Nakamura A, Swigart PM, Rodrigo MC, Simpson GL, Cotecchia S, Rokosh DG, Grossman W, Foster E, Simpson PC. The alpha(1A/C)- and alpha(1B)-adrenergic receptors are required for physiological cardiac hypertrophy in the double-knockout mouse. Volume 111 of Issue 11. The Journal of clinical investigation 2003. PMID: 12782680


  61. McLean BG, Lee KS, Simpson PC, Farrance IK. Basal and alpha1-adrenergic-induced activity of minimal rat betaMHC promoters in cardiac myocytes requires multiple TEF-1 but not NFAT binding sites. Journal of molecular and cellular cardiology 2003. PMID: 12738228


  62. Gilman AG, Simon MI, Bourne HR, Harris BA, Long R, Ross EM, Stull JT, Taussig R, Bourne HR, Arkin AP, Cobb MH, Cyster JG, Devreotes PN, Ferrell JE, Fruman D, Gold M, Weiss A, Stull JT, Berridge MJ, Cantley LC, Catterall WA, Coughlin SR, Olson EN, Smith TF, Brugge JS, Botstein D, Dixon JE, Hunter T, Lefkowitz RJ, Pawson AJ, Sternberg PW, Varmus H, Subramaniam S, Sinkovits RS, Li J, Mock D, Ning Y, Saunders B, Sternweis PC, Hilgemann D, Scheuermann RH, DeCamp D, Hsueh R, Lin KM, Ni Y, Seaman WE, Simpson PC, O'Connell TD, Roach T, Simon MI, Choi S, Eversole-Cire P, Fraser I, Mumby MC, Zhao Y, Brekken D, Shu H, Meyer T, Chandy G, Heo WD, Liou J, O'Rourke N, Verghese M, Mumby SM, Han H, Brown HA, Forrester JS, Ivanova P, Milne SB, Casey PJ, Harden TK, Arkin AP, Doyle J, Gray ML, Meyer T, Michnick S, Schmidt MA, Toner M, Tsien RY, Natarajan M, Ranganathan R, Sambrano GR. Overview of the Alliance for Cellular Signaling. Nature 2002. PMID: 12478301


  63. Turnbull L, McCloskey DT, O'Connell TD, Simpson PC, Baker AJ. Alpha 1-adrenergic receptor responses in alpha 1AB-AR knockout mouse hearts suggest the presence of alpha 1D-AR. American journal of physiology. Heart and circulatory physiology 2002. PMID: 12595294


  64. McCloskey DT, Rokosh DG, O'Connell TD, Keung EC, Simpson PC, Baker AJ. Alpha(1)-adrenoceptor subtypes mediate negative inotropy in myocardium from alpha(1A/C)-knockout and wild type mice. Journal of molecular and cellular cardiology 2002. PMID: 12234770


  65. Rokosh DG, Simpson PC. Knockout of the alpha 1A/C-adrenergic receptor subtype: the alpha 1A/C is expressed in resistance arteries and is required to maintain arterial blood pressure. Proceedings of the National Academy of Sciences of the United States of America 2002. PMID: 12093905


  66. Kinugawa K, Yonekura K, Ribeiro RC, Eto Y, Aoyagi T, Baxter JD, Camacho SA, Bristow MR, Long CS, Simpson PC. Regulation of thyroid hormone receptor isoforms in physiological and pathological cardiac hypertrophy. Circulation research 2001. PMID: 11577024


  67. Nakamura A, Rokosh DG, Paccanaro M, Yee RR, Simpson PC, Grossman W, Foster E. LV systolic performance improves with development of hypertrophy after transverse aortic constriction in mice. American journal of physiology. Heart and circulatory physiology 2001. PMID: 11514276


  68. O'Connell TD, Rokosh DG, Simpson PC. Cloning and characterization of the mouse alpha1C/A-adrenergic receptor gene and analysis of an alpha1C promoter in cardiac myocytes: role of an MCAT element that binds transcriptional enhancer factor-1 (TEF-1). Molecular pharmacology 2001. PMID: 11306707


  69. Baker AJ, Redfern CH, Harwood MD, Simpson PC, Conklin BR. Abnormal contraction caused by expression of G(i)-coupled receptor in transgenic model of dilated cardiomyopathy. Volume 280 of Issue 4. American journal of physiology. Heart and circulatory physiology 2001. PMID: 11247776


  70. Zuzarte PC, Farrance IK, Simpson PC, Wildeman AG. Tumor cell splice variants of the transcription factor TEF-1 induced by SV40 T-antigen transformation. Biochimica et biophysica acta 2000. PMID: 11118619


  71. Deng XF, Rokosh DG, Simpson PC. Autonomous and growth factor-induced hypertrophy in cultured neonatal mouse cardiac myocytes. Comparison with rat. Circulation research 2000. PMID: 11055982


  72. Simpson PC. Beta-protein kinase C and hypertrophic signaling in human heart failure. Circulation 1999. PMID: 9918516


  73. Yue P, Long CS, Austin R, Chang KC, Simpson PC, Massie BM. Post-infarction heart failure in the rat is associated with distinct alterations in cardiac myocyte molecular phenotype. Journal of molecular and cellular cardiology 1998. PMID: 9737947


  74. Yue P, Massie BM, Simpson PC, Long CS. Cytokine expression increases in nonmyocytes from rats with postinfarction heart failure. The American journal of physiology 1998. PMID: 9688921


  75. Chang KC, Figueredo VM, Schreur JH, Kariya K, Weiner MW, Simpson PC, Camacho SA. Thyroid hormone improves function and Ca2+ handling in pressure overload hypertrophy. Association with increased sarcoplasmic reticulum Ca2+-ATPase and alpha-myosin heavy chain in rat hearts. The Journal of clinical investigation 1997. PMID: 9312172


  76. Rokosh DG, Stewart AF, Chang KC, Bailey BA, Karliner JS, Camacho SA, Long CS, Simpson PC. Alpha1-adrenergic receptor subtype mRNAs are differentially regulated by alpha1-adrenergic and other hypertrophic stimuli in cardiac myocytes in culture and in vivo. Repression of alpha1B and alpha1D but induction of alpha1C. The Journal of biological chemistry 1996. PMID: 8621454


  77. Karns LR, Kariya K, Simpson PC. M-CAT, CArG, and Sp1 elements are required for alpha 1-adrenergic induction of the skeletal alpha-actin promoter during cardiac myocyte hypertrophy. Transcriptional enhancer factor-1 and protein kinase C as conserved transducers of the fetal program in ca The Journal of biological chemistry 1995. PMID: 7814403


  78. Stewart AF, Rokosh DG, Bailey BA, Karns LR, Chang KC, Long CS, Kariya K, Simpson PC. Cloning of the rat alpha 1C-adrenergic receptor from cardiac myocytes. alpha 1C, alpha 1B, and alpha 1D mRNAs are present in cardiac myocytes but not in cardiac fibroblasts. Circulation research 1994. PMID: 7923624


  79. Rokosh DG, Bailey BA, Stewart AF, Karns LR, Long CS, Simpson PC. Distribution of alpha 1C-adrenergic receptor mRNA in adult rat tissues by RNase protection assay and comparison with alpha 1B and alpha 1D. Biochemical and biophysical research communications 1994. PMID: 8185565


  80. Kariya K, Karns LR, Simpson PC. An enhancer core element mediates stimulation of the rat beta-myosin heavy chain promoter by an alpha 1-adrenergic agonist and activated beta-protein kinase C in hypertrophy of cardiac myocytes. The Journal of biological chemistry 1994. PMID: 8106422


  81. Kariya K, Farrance IK, Simpson PC. Transcriptional enhancer factor-1 in cardiac myocytes interacts with an alpha 1-adrenergic- and beta-protein kinase C-inducible element in the rat beta-myosin heavy chain promoter. The Journal of biological chemistry 1993. PMID: 8253797


  82. Long CS, Hartogensis WE, Simpson PC. Beta-adrenergic stimulation of cardiac non-myocytes augments the growth-promoting activity of non-myocyte conditioned medium. Journal of molecular and cellular cardiology 1993. PMID: 7505339


  83. Long CS, Kariya K, Karns L, Simpson PC. Sympathetic modulation of the cardiac myocyte phenotype: studies with a cell-culture model of myocardial hypertrophy. Basic research in cardiology 1992. PMID: 1338564


  84. Long CS, Henrich CJ, Simpson PC. A growth factor for cardiac myocytes is produced by cardiac nonmyocytes. Cell regulation 1991. PMID: 1801925


  85. Kariya K, Karns LR, Simpson PC. Expression of a constitutively activated mutant of the beta-isozyme of protein kinase C in cardiac myocytes stimulates the promoter of the beta-myosin heavy chain isogene. The Journal of biological chemistry 1991. PMID: 2037558


  86. Simpson PC, Kariya K, Karns LR, Long CS, Karliner JS. Adrenergic hormones and control of cardiac myocyte growth. Molecular and cellular biochemistry 1991. PMID: 1656195


  87. Long CS, Kariya K, Karns L, Simpson PC. Sympathetic activity: modulator of myocardial hypertrophy. Journal of cardiovascular pharmacology 1991. PMID: 1715479


  88. Long CS, Kariya K, Karns L, Simpson PC. Trophic factors for cardiac myocytes. Journal of hypertension. Supplement : official journal of the International Society of Hypertension 1990. PMID: 1965655


  89. Mochly-Rosen D, Henrich CJ, Cheever L, Khaner H, Simpson PC. A protein kinase C isozyme is translocated to cytoskeletal elements on activation. Cell regulation 1990. PMID: 2078573


  90. Waspe LE, Ordahl CP, Simpson PC. The cardiac beta-myosin heavy chain isogene is induced selectively in alpha 1-adrenergic receptor-stimulated hypertrophy of cultured rat heart myocytes. The Journal of clinical investigation 1990. PMID: 2156896


  91. Karliner JS, Kagiya T, Simpson PC. Effects of pertussis toxin on alpha 1-agonist-mediated phosphatidylinositide turnover and myocardial cell hypertrophy in neonatal rat ventricular myocytes. Experientia 1990. PMID: 2153573


  92. Simpson PC, Long CS, Waspe LE, Henrich CJ, Ordahl CP. Transcription of early developmental isogenes in cardiac myocyte hypertrophy. Journal of molecular and cellular cardiology 1989. PMID: 2560798


  93. Long CS, Ordahl CP, Simpson PC. Alpha 1-adrenergic receptor stimulation of sarcomeric actin isogene transcription in hypertrophy of cultured rat heart muscle cells. The Journal of clinical investigation 1989. PMID: 2537847


  94. Simpson PC. Proto-oncogenes and cardiac hypertrophy. Annual review of physiology 1989. PMID: 2469381


  95. Henrich CJ, Simpson PC. Differential acute and chronic response of protein kinase C in cultured neonatal rat heart myocytes to alpha 1-adrenergic and phorbol ester stimulation. Journal of molecular and cellular cardiology 1988. PMID: 2907916


  96. Karliner JS, Simpson PC. Beta-adrenoceptor and adenylate cyclase regulation in cardiac myocyte growth. Basic research in cardiology 1988. PMID: 2851972


  97. Simpson PC. Role of proto-oncogenes in myocardial hypertrophy. The American journal of cardiology 1988. PMID: 2972186


  98. Simpson PC. Comments on "Load regulation of the properties of adult feline cardiocytes: the role of substrate adhesion."Circ Res 1986;58:692-705. Circulation research 1988. PMID: 3349579


  99. Bishopric NH, Simpson PC, Ordahl CP. Induction of the skeletal alpha-actin gene in alpha 1-adrenoceptor-mediated hypertrophy of rat cardiac myocytes. The Journal of clinical investigation 1987. PMID: 2821075


  100. Starksen NF, Simpson PC, Bishopric N, Coughlin SR, Lee WM, Escobedo JA, Williams LT. Cardiac myocyte hypertrophy is associated with c-myc protooncogene expression. Proceedings of the National Academy of Sciences of the United States of America 1986. PMID: 3022291


  101. Karliner JS, Simpson PC, Honbo N, Woloszyn W. Mechanisms and time course of beta 1 adrenoceptor desensitisation in mammalian cardiac myocytes. Cardiovascular research 1986. PMID: 3011269


  102. Simpson P. Stimulation of hypertrophy of cultured neonatal rat heart cells through an alpha 1-adrenergic receptor and induction of beating through an alpha 1- and beta 1-adrenergic receptor interaction. Evidence for independent regulation of growth and beating. Circulation research 1985. PMID: 2988814


  103. Karliner JS, Simpson PC, Taylor JE, Honbo N, Woloszyn W. Adrenergic receptor characteristics of cardiac myocytes cultured in serum-free medium: comparison with serum-supplemented medium. Biochemical and biophysical research communications 1985. PMID: 3985976


  104. Inouye IK, Massie BM, Benowitz N, Simpson P, Loge D. Antihypertensive therapy with diltiazem and comparison with hydrochlorothiazide. The American journal of cardiology 1984. PMID: 6375339


  105. Inouye IK, Massie BM, Loge D, Simpson P, Tubau JF. Failure of antihypertensive therapy with diuretic, beta-blocking and calcium channel-blocking drugs to consistently reverse left ventricular diastolic filling abnormalities. The American journal of cardiology 1984. PMID: 6731303


  106. Inouye I, Massie B, Benowitz N, Simpson P, Loge D, Topic N. Monotherapy in mild to moderate hypertension: comparison of hydrochlorothiazide, propranolol and prazosin. The American journal of cardiology 1984. PMID: 6320622


  107. Inouye I, Massie B, Loge D, Topic N, Silverstein D, Simpson P, Tubau J. Abnormal left ventricular filling: an early finding in mild to moderate systemic hypertension. The American journal of cardiology 1984. PMID: 6691248


  108. Simpson P. Norepinephrine-stimulated hypertrophy of cultured rat myocardial cells is an alpha 1 adrenergic response. The Journal of clinical investigation 1983. PMID: 6135712


  109. Simpson P, McGrath A, Savion S. Myocyte hypertrophy in neonatal rat heart cultures and its regulation by serum and by catecholamines. Circulation research 1982. PMID: 6216022


  110. Simpson P, Savion S. Differentiation of rat myocytes in single cell cultures with and without proliferating nonmyocardial cells. Cross-striations, ultrastructure, and chronotropic response to isoproterenol. Circulation research 1982. PMID: 7053872


  111. Godwin JD, Axel L, Adams JR, Schiller NB, Simpson PC, Gertz EW. Computed tomography: a new method for diagnosing tumor of the heart. Circulation 1981. PMID: 7449067


  112. McGee R, Simpson P, Christian C, Mata M, Nelson P, Nirenberg M. Regulation of acetylcholine release from neuroblastoma x glioma hybrid cells. Proceedings of the National Academy of Sciences of the United States of America 1978. PMID: 206894


  113. Sherman WR, Simpson PC, Goodwin SL. scyllo-inositol and myo-inositol levels in tissues of the skate Raja erinacea. Comparative biochemistry and physiology. B, Comparative biochemistry 1978. PMID: 318234


  114. Birnberger AC, Birnberger KL, Eliasson SG, Simpson PC. Effect of cyanide and electrical stimulation on phosphoinositide metabolism in lobster nerves. Journal of neurochemistry 1971. PMID: 4330289


  115. Sherman WR, Stewart MA, Simpson PC, Goodwin SL. The identification of myo-inosose-2 and scyllo-inositol in mammalian tissues. Biochemistry 1968. PMID: 5644141