Research Topics
Species | Stephanie C Tjen-A-LooiSummaryAffiliation: University of California Country: USA Publications
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Publications
Modulation of cardiopulmonary depressor reflex in nucleus ambiguus by electroacupuncture: roles of opioids and γ-aminobutyric acidStephanie C Tjen-A-Looi
Medical Science 1 C240, School of Medicine, Univ of California, Irvine, CA 92697 4075
Am J Physiol Regul Integr Comp Physiol 302:R833-44. 2012..Thus EA at P5-6 decreases PBG evoked hypotension and bradycardia as well as the NAmb PBG-sensitive preganglionic cardiac vagal outflow through opioid and GABA neurotransmitter systems...- Nitric oxide modulates sympathoexcitatory cardiac-cardiovascular reflexes elicited by bradykininS C Tjen-A-Looi
Department of Medicine, University of California, Irvine, California 92697 4075, USA
Am J Physiol Heart Circ Physiol 281:H2010-7. 2001..05). In conclusion, neuronal NOS facilitates, whereas endothelial NOS modulates, the excitatory cardiovascular reflex elicited by chemical stimulation of sympathetic cardiac afferents... - Role of medullary GABA, opioids, and nociceptin in prolonged inhibition of cardiovascular sympathoexcitatory reflexes during electroacupuncture in catsStephanie C Tjen-A-Looi
Department of Medicine, Susan Samueli Center for Integrative Medicine, School of Medicine, University of California Irvine, CA 92697 4075, USA
Am J Physiol Heart Circ Physiol 293:H3627-35. 2007..Furthermore, in the rVLM, opioids and GABA, but not nociceptin, participate in the long-term EA-related inhibition of sympathoexcitatory cardiovascular responses... - Midbrain vlPAG inhibits rVLM cardiovascular sympathoexcitatory responses during electroacupunctureStephanie C Tjen-A-Looi
Department of Medicine, Susan Samueli Center for Integrative Medicine, UCI School of Medicine, University of California Irvine, CA 92697 4075, USA
Am J Physiol Heart Circ Physiol 290:H2543-53. 2006..We conclude that the inhibitory influence of EA involves vlPAG stimulation, which, in turn, inhibits rVLM neurons in the EA-related attenuation of the cardiovascular excitatory response during visceral afferent stimulation... - Role of unmyelinated fibers in electroacupuncture cardiovascular responsesStephanie C Tjen-A-Looi
Medical Science 1, Department of Medicine, College of Medicine, University of California, Irvine, CA 92697 4075, USA
Auton Neurosci 118:43-50. 2005..This study demonstrates that the inhibitory effect of EA at P5-P6 on cardiovascular autonomic excitatory reflexes involves unmyelinated group IV fibers of the median nerves... - Processing cardiovascular information in the vlPAG during electroacupuncture in rats: roles of endocannabinoids and GABAStephanie C Tjen-A-Looi
School of Medicine, University of California, Irvine, CA 92697 4075, USA
J Appl Physiol 106:1793-9. 2009..Reduction of GABA release disinhibits vlPAG cells, which, in turn, modulate the activity of rVLM neurons to attenuate the sympathoexcitatory reflex responses... - Central and peripheral mechanisms underlying gastric distention inhibitory reflex responses in hypercapnic-acidotic ratsStephanie C Tjen-A-Looi
Susan Samueli Center for Integrative Medicine, Department of Medicine, School of Medicine, University of California, Irvine, California 92697 4075, USA
Am J Physiol Heart Circ Physiol 300:H1003-12. 2011..Efferent chronotropic responses involve both increased parasympathetic and reduced sympathetic activity, whereas the decrease in BP is mediated by reduced α-adrenergic tone... - Medullary substrate and differential cardiovascular responses during stimulation of specific acupointsStephanie C Tjen-A-Looi
Medical Science 1 C240, College of Medicine, Univ of California, Irvine, California 92697 4075, USA
Am J Physiol Regul Integr Comp Physiol 287:R852-62. 2004.... - Xanthine oxidase, but not neutrophils, contributes to activation of cardiac sympathetic afferents during myocardial ischaemia in catsStephanie C Tjen-A-Looi
Department of Internal Medicine, College of Medicine, University of California, Irvine, CA 92697 4075, USA
J Physiol 543:327-36. 2002..This study demonstrates that ROS generated from the oxidation of purines contribute to the stimulation of ischaemically sensitive cardiac sympathetic afferents, whereas PMNs do not play a major role in this process... - Serotonergic projection from nucleus raphe pallidus to rostral ventrolateral medulla modulates cardiovascular reflex responses during acupunctureAli Moazzami
Susan Samueli Center for Integrative Medicine, Department of Medicine, Medical Science 1 C240, School of Medicine, University of California, Irvine, CA 92697 4075, USA
J Appl Physiol 108:1336-46. 2010..Thus activation of the NRP, through a mechanism involving serotonergic neurons and 5-HT1A receptors in the rVLM during somatic stimulation with EA, attenuates sympathoexcitatory cardiovascular reflexes... - Long-loop pathways in cardiovascular electroacupuncture responsesPeng Li
Department of Medicine, University of California, Irvine, CA, USA
J Appl Physiol 106:620-30. 2009..Direct projections from the ARC to the rVLM, which serve as an important source of beta-endorphin, appear also to exist... - Nucleus raphe pallidus participates in midbrain-medullary cardiovascular sympathoinhibition during electroacupuncturePeng Li
Susan Samueli Center for Integrative Medicine, Department of Medicine, School of Medicine, University of California, Irvine, Irvine, California 92697 4075, USA
Am J Physiol Regul Integr Comp Physiol 299:R1369-76. 2010..These results indicate that EA activates the vlPAG, which excites the NRP to, in turn, inhibit rVLM presympathetic neurons and reflex cardiovascular sympathoexcitatory responses... - Excitatory projections from arcuate nucleus to ventrolateral periaqueductal gray in electroacupuncture inhibition of cardiovascular reflexesPeng Li
Department of Medicine, Susan Samueli Center for Integrative Medicine, UCI School of Medicine, University of California Irvine, CA 92697 4075, USA
Am J Physiol Heart Circ Physiol 290:H2535-42. 2006..These results suggest that excitatory projections from the ARC to the vlPAG are essential to the EA inhibition of the reflex increase in BP induced by SN or gallbladder visceral afferent stimulation... - Afferent mechanisms underlying stimulation modality-related modulation of acupuncture-related cardiovascular responsesWei Zhou
Department of Medicine, College of Medicine, University of California, Irvine, CA 92697, USA
J Appl Physiol 98:872-80. 2005..The similarity of the responses to EA and MA and the lack of cardiovascular response to high-frequency EA appear to be largely a function of somatic afferent responses... - Prolonged inhibition of rostral ventral lateral medullary premotor sympathetic neurons by electroacupuncture in catsStephanie C Tjen-A-Looi
Department of Internal Medicine, University of California at Irvine, Irvine, CA 92697 4075, USA
Auton Neurosci 106:119-31. 2003..Through an opioid mechanism, EA inhibits splanchnic nerve-induced excitatory responses of these rVLM neurons. Many of these neurons receiving convergent visceral and somatic input exhibit long-lasting inhibition by EA... - Role of glutamate in a visceral sympathoexcitatory reflex in rostral ventrolateral medulla of catsWei Zhou
Susan Samueli Center for Integrative Medicine, Department of Medicine, School of Medicine, University of California, Irvine, CA 92697 4075, USA
Am J Physiol Heart Circ Physiol 291:H1309-18. 2006..These results suggest that glutamate in the rVLM serves as an excitatory neurotransmitter through a baroreflex-independent mechanism and that both NMDA and AMPA receptors mediate the visceral sympathoexcitatory reflex responses... - Nitric oxide in rostral ventrolateral medulla regulates cardiac-sympathetic reflexes: role of synthase isoformsZhi Ling Guo
Department of Medicine, School of Medicine, University of California, Susan Samueli Center for Integrative Medicine, Irvine, Irvine, California 92697 4075, USA
Am J Physiol Heart Circ Physiol 297:H1478-86. 2009..These data suggest that NO, specifically nNOS, mediates sympathetic cardiac-cardiovascular responses through its action in the rVLM... - Effect of electroacupuncture on pressor reflex during gastric distensionPeng Li
Department of Internal Medicine, College of Medicine, University of California, Irvine, California 92697 4075, USA
Am J Physiol Regul Integr Comp Physiol 283:R1335-45. 2002.... - An arcuate-ventrolateral periaqueductal gray reciprocal circuit participates in electroacupuncture cardiovascular inhibitionPeng Li
Department of Medicine, Susan Samueli Center for Integrative Medicine, School of Medicine, University of California, Irvine, CA 92697 4075, United States
Auton Neurosci 158:13-23. 2010..Thus, a reciprocal excitatory glutamatergic neural circuit between the arcuate and vlPAG contributes to long-lasting EA cardiovascular inhibition. ACh in the arcuate but not in the vlPAG participates in the reciprocal excitation... - Nociceptin in rVLM mediates electroacupuncture inhibition of cardiovascular reflex excitatory response in ratsMelissa M Crisostomo
Medical Science 1, C240, College of Medicine, University of California Irvine, Irvine, CA 92697 4075, USA
J Appl Physiol 98:2056-63. 2005..Thus, in addition to the classical opioid system, nociceptin, through opioid receptor-like-1 receptor stimulation in the rVLM, participates in the modulatory influence of EA on reflex-induced increases in blood pressure... - Brain stem mechanisms underlying acupuncture modality-related modulation of cardiovascular responses in ratsWei Yi Syuu Zhou
Department of Medicine, College of Medicine, Univ of California, Irvine, CA 92697 4075, USA
J Appl Physiol 99:851-60. 2005.... - Electroacupuncture enhances preproenkephalin mRNA expression in rostral ventrolateral medulla of ratsMin Li
Department of Medicine and Susan Samueli Center of Integrative Medicine, College of Medicine, University of California, Irvine, CA 92697 4075, United States
Neurosci Lett 477:61-5. 2010.... - Repetitive electroacupuncture causes prolonged increased met-enkephalin expression in the rVLM of conscious ratsMin Li
Department of Medicine, School of Medicine, University of California, Irvine, 92697 4075, United States
Auton Neurosci 170:30-5. 2012..Since opioids in the rVLM contribute importantly to the action of EA on sympathetic outflow, this mechanism may contribute to the prolonged action of acupuncture on elevated blood pressure in patients...