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Helen Baghdoyan

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Giancarlo Vanini; Helen A Baghdoyan
Extrasynaptic GABAA receptors in rat pontine reticular formation increase wakefulness.
George C Gettys; Ed Kimlin; Fang Liu; Helen A Baghdoyan; Ralph Lydic
Adenosine A(1) receptors in mouse pontine reticular formation depress breathing, increase anesthesia recovery time, and decrease acetylcholine release.
Giancarlo Vanini; Ralph Lydic; Helen A Baghdoyan
GABA-to-ACh ratio in basal forebrain and cerebral cortex varies significantly during sleep.

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All Publications

2013: Giancarlo Vanini; Helen A Baghdoyan
Extrasynaptic GABAA receptors in rat pontine reticular formation increase wakefulness.
Sleep 2013;36(3):337-43.
2013: George C Gettys; Ed Kimlin; Fang Liu; Helen A Baghdoyan; Ralph Lydic
Adenosine A(1) receptors in mouse pontine reticular formation depress breathing, increase anesthesia recovery time, and decrease acetylcholine release.
Anesthesiology 2013;118(2):327-36.
2012: Giancarlo Vanini; Ralph Lydic; Helen A Baghdoyan
GABA-to-ACh ratio in basal forebrain and cerebral cortex varies significantly during sleep.
Sleep 2012;35(10):1325-34.
2012: Asheley B Wathen; Emily S West; Ralph Lydic; Helen A Baghdoyan
Olanzapine causes a leptin-dependent increase in acetylcholine release in mouse prefrontal cortex.
Sleep 2012;35(3):315-23.
2011: Elizabeth A Gauthier; Sarah E Guzick; Helen A Baghdoyan; Chad M Brummett; Ralph Lydic
Buprenorphine disrupts sleep and decreases adenosine concentrations in sleep-regulating brain regions of Sprague Dawley rat.
Anesthesiology 2011;115(4):743-53.
2011: Christopher J Watson; Ralph Lydic; Helen A Baghdoyan
Sleep duration varies as a function of glutamate and GABA in rat pontine reticular formation.
Journal of neurochemistry 2011;118(4):571-80.
2011: Giancarlo Vanini; Bradley L Wathen; Ralph Lydic; Helen A Baghdoyan
Endogenous GABA levels in the pontine reticular formation are greater during wakefulness than during rapid eye movement sleep.
The Journal of neuroscience : the official journal of the Society for Neuroscience 2011;31(7):2649-56.
2010: Aaron R Muncey; Adam R Saulles; Lauren G Koch; steven britton; Helen A Baghdoyan; Ralph Lydic
Disrupted sleep and delayed recovery from chronic peripheral neuropathy are distinct phenotypes in a rat model of metabolic syndrome.
Anesthesiology 2010;113(5):1176-85.
2010: Holly N Brevig; Christopher J Watson; Ralph Lydic; Helen A Baghdoyan
Hypocretin and GABA interact in the pontine reticular formation to increase wakefulness.
Sleep 2010;33(10):1285-93.
2010: RaShonda R Flint; Theresa Chang; Ralph Lydic; Helen A Baghdoyan
GABA(A) receptors in the pontine reticular formation of C57BL/6J mouse modulate neurochemical, electrographic, and behavioral phenotypes of wakefulness.
The Journal of neuroscience : the official journal of the Society for Neuroscience 2010;30(37):12301-9.
2010: Viviane S Hambrecht-Wiedbusch; Elizabeth A Gauthier; Helen A Baghdoyan; Ralph Lydic
Benzodiazepine receptor agonists cause drug-specific and state-specific alterations in EEG power and acetylcholine release in rat pontine reticular formation.
Sleep 2010;33(7):909-18.
2010: Sarah L Watson; Christopher J Watson; Helen A Baghdoyan; Ralph Lydic
Thermal nociception is decreased by hypocretin-1 and an adenosine A1 receptor agonist microinjected into the pontine reticular formation of Sprague Dawley rat.
The journal of pain : official journal of the American Pain Society 2010;11(6):535-44.
2009: Ariana M Nelson; Alanna S Battersby; Helen A Baghdoyan; Ralph Lydic
Opioid-induced decreases in rat brain adenosine levels are reversed by inhibiting adenosine deaminase.
Anesthesiology 2009;111(6):1327-33.
2009: Eduardo E Icaza; Xinyan Huang; Ying Fu; Richard Neubig; Helen A Baghdoyan; Ralph Lydic
Isoflurane-induced changes in righting response and breathing are modulated by RGS proteins.
Anesthesia and analgesia 2009;109(5):1500-5.
2009: Wenfei Wang; Helen A Baghdoyan; Ralph Lydic
Leptin replacement restores supraspinal cholinergic antinociception in leptin-deficient obese mice.
The journal of pain : official journal of the American Pain Society 2009;10(8):836-43.
2009: V S Hambrecht; P E Vlisides; B W Row; D Gozal; Helen A Baghdoyan; Ralph Lydic
G proteins in rat prefrontal cortex (PFC) are differentially activated as a function of oxygen status and PFC region.
Journal of chemical neuroanatomy 2009;37(2):112-7.
2009: Christa J Van Dort; Helen A Baghdoyan; Ralph Lydic
Adenosine A(1) and A(2A) receptors in mouse prefrontal cortex modulate acetylcholine release and behavioral arousal.
The Journal of neuroscience : the official journal of the Society for Neuroscience 2009;29(3):871-81.
2008: Zhenghong Zhu; Heather R Bowman; Helen A Baghdoyan; Ralph Lydic
Morphine increases acetylcholine release in the trigeminal nuclear complex.
Sleep 2008;31(12):1629-37.
2008: Giancarlo Vanini; Christopher J Watson; Ralph Lydic; Helen A Baghdoyan
Gamma-aminobutyric acid-mediated neurotransmission in the pontine reticular formation modulates hypnosis, immobility, and breathing during isoflurane anesthesia.
Anesthesiology 2008;109(6):978-88.
2008: Christopher J Watson; Haideliza Soto-Calderon; Ralph Lydic; Helen A Baghdoyan
Pontine reticular formation (PnO) administration of hypocretin-1 increases PnO GABA levels and wakefulness.
Sleep 2008;31(4):453-64.
2008: Christa J Van Dort; Helen A Baghdoyan; Ralph Lydic
Neurochemical modulators of sleep and anesthetic states.
International anesthesiology clinics 2008;46(3):75-104.
2007: Eric M Skulsky; Nadir I Osman; Helen A Baghdoyan; Ralph Lydic
Microdialysis delivery of morphine to the hypoglossal nucleus of Wistar rat increases hypoglossal acetylcholine release.
Sleep 2007;30(5):566-73.
2007: Christopher J Watson; Ralph Lydic; Helen A Baghdoyan
Sleep and GABA levels in the oral part of rat pontine reticular formation are decreased by local and systemic administration of morphine.
Neuroscience 2007;144(1):375-86.
2007: V S Hambrecht; P E Vlisides; B W Row; D Gozal; Helen A Baghdoyan; Ralph Lydic
Hypoxia modulates cholinergic but not opioid activation of G proteins in rat hippocampus.
Hippocampus 2007;17(10):934-42.
2006: Ralph Lydic; Ricardo Garza-Grande; Richard Struthers; Helen A Baghdoyan
Nitric oxide in B6 mouse and nitric oxide-sensitive soluble guanylate cyclase in cat modulate acetylcholine release in pontine reticular formation.
Journal of applied physiology (Bethesda, Md. : 1985) 2006;100(5):1666-73.
2006: René Bernard; Ralph Lydic; Helen A Baghdoyan
Hypocretin (orexin) receptor subtypes differentially enhance acetylcholine release and activate g protein subtypes in rat pontine reticular formation.
The Journal of pharmacology and experimental therapeutics 2006;317(1):163-71.
2006: Christal G Coleman; Helen A Baghdoyan; Ralph Lydic
Dialysis delivery of an adenosine A2A agonist into the pontine reticular formation of C57BL/6J mouse increases pontine acetylcholine release and sleep.
Journal of neurochemistry 2006;96(6):1750-9.
2006: Helen A Baghdoyan
Hyperalgesia induced by REM sleep loss: a phenomenon in search of a mechanism.
Sleep 2006;29(2):137-9.
2005: Ralph Lydic; Helen A Baghdoyan
Sleep, anesthesiology, and the neurobiology of arousal state control.
Anesthesiology 2005;103(6):1268-95.
2005: Nadir I Osman; Helen A Baghdoyan; Ralph Lydic
Morphine inhibits acetylcholine release in rat prefrontal cortex when delivered systemically or by microdialysis to basal forebrain.
Anesthesiology 2005;103(4):779-87.
2005: Christopher L Douglas; Grant N Bowman; Helen A Baghdoyan; Ralph Lydic
C57BL/6J and B6.V-LEPOB mice differ in the cholinergic modulation of sleep and breathing.
Journal of applied physiology (Bethesda, Md. : 1985) 2005;98(3):918-29.
2004: Christopher L Douglas; George J Demarco; Helen A Baghdoyan; Ralph Lydic
Pontine and basal forebrain cholinergic interaction: implications for sleep and breathing.
Respiratory physiology & neurobiology 2004;143(2-3):251-62.
2004: Jacqueline Vazquez-DeRose; Helen A Baghdoyan
GABAA receptors inhibit acetylcholine release in cat pontine reticular formation: implications for REM sleep regulation.
Journal of neurophysiology 2004;92(4):2198-206.
2004: Christal G Coleman; Ralph Lydic; Helen A Baghdoyan
Acetylcholine release in the pontine reticular formation of C57BL/6J mouse is modulated by non-M1 muscarinic receptors.
Neuroscience 2004;126(4):831-8.
2004: Christal G Coleman; Ralph Lydic; Helen A Baghdoyan
M2 muscarinic receptors in pontine reticular formation of C57BL/6J mouse contribute to rapid eye movement sleep generation.
Neuroscience 2004;126(4):821-30.
2004: George J Demarco; Helen A Baghdoyan; Ralph Lydic
Carbachol in the pontine reticular formation of C57BL/6J mouse decreases acetylcholine release in prefrontal cortex.
Neuroscience 2004;123(1):17-29.
2003: René Bernard; Ralph Lydic; Helen A Baghdoyan
Hypocretin-1 causes G protein activation and increases ACh release in rat pons.
The European journal of neuroscience 2003;18(7):1775-85.
2003: Diana Tanase; Helen A Baghdoyan; Ralph Lydic
Dialysis delivery of an adenosine A1 receptor agonist to the pontine reticular formation decreases acetylcholine release and increases anesthesia recovery time.
Anesthesiology 2003;98(4):912-20.
2003: George J Demarco; Helen A Baghdoyan; Ralph Lydic
Differential cholinergic activation of G proteins in rat and mouse brainstem: relevance for sleep and nociception.
The Journal of comparative neurology 2003;457(2):175-84.
2003: Jacqueline Vazquez-DeRose; Helen A Baghdoyan
Muscarinic and GABAA receptors modulate acetylcholine release in feline basal forebrain.
The European journal of neuroscience 2003;17(2):249-59.
2002: Ralph Lydic; Christopher L Douglas; Helen A Baghdoyan
Microinjection of neostigmine into the pontine reticular formation of C57BL/6J mouse enhances rapid eye movement sleep and depresses breathing.
Sleep 2002;25(8):835-41.
2002: Christopher L Douglas; Helen A Baghdoyan; Ralph Lydic
Postsynaptic muscarinic M1 receptors activate prefrontal cortical EEG of C57BL/6J mouse.
Journal of neurophysiology 2002;88(6):3003-9.
2002: Diana Tanase; Helen A Baghdoyan; Ralph Lydic
Microinjection of an adenosine A1 agonist into the medial pontine reticular formation increases tail flick latency to thermal stimulation.
Anesthesiology 2002;97(6):1597-601.
2002: Ralph Lydic; Helen A Baghdoyan
Ketamine and MK-801 decrease acetylcholine release in the pontine reticular formation, slow breathing, and disrupt sleep.
Sleep 2002;25(6):617-22.
2002: Jacqueline Vazquez-DeRose; Ralph Lydic; Helen A Baghdoyan
The nitric oxide synthase inhibitor NG-Nitro-L-arginine increases basal forebrain acetylcholine release during sleep and wakefulness.
The Journal of neuroscience : the official journal of the Society for Neuroscience 2002;22(13):5597-605.
2002: Christopher L Douglas; Helen A Baghdoyan; Ralph Lydic
Prefrontal cortex acetylcholine release, EEG slow waves, and spindles are modulated by M2 autoreceptors in C57BL/6J mouse.
Journal of neurophysiology 2002;87(6):2817-22.
2002: René Bernard; Ralph Lydic; Helen A Baghdoyan
Hypocretin-1 activates G proteins in arousal-related brainstem nuclei of rat.
Neuroreport 2002;13(4):447-50.
2001: Christopher L Douglas; Helen A Baghdoyan; Ralph Lydic
M2 muscarinic autoreceptors modulate acetylcholine release in prefrontal cortex of C57BL/6J mouse.
The Journal of pharmacology and experimental therapeutics 2001;299(3):960-6.
2001: Jacqueline Vazquez-DeRose; Helen A Baghdoyan
Basal forebrain acetylcholine release during REM sleep is significantly greater than during waking.
American journal of physiology. Regulatory, integrative and comparative physiology 2001;280(2):R598-601.
2001: Diana Tanase; W A Martin; Helen A Baghdoyan; Ralph Lydic
G protein activation in rat ponto-mesencephalic nuclei is enhanced by combined treatment with a mu opioid and an adenosine A1 receptor agonist.
Sleep 2001;24(1):52-62.
1999: Helen A Baghdoyan; Ralph Lydic
M2 muscarinic receptor subtype in the feline medial pontine reticular formation modulates the amount of rapid eye movement sleep.
Sleep 1999;22(7):835-47.
1999: S Mortazavi; J Thompson; Helen A Baghdoyan; Ralph Lydic
Fentanyl and morphine, but not remifentanil, inhibit acetylcholine release in pontine regions modulating arousal.
Anesthesiology 1999;90(4):1070-7.
1998: AM Kshatri; Helen A Baghdoyan; Ralph Lydic
Cholinomimetics, but not morphine, increase antinociceptive behavior from pontine reticular regions regulating rapid-eye-movement sleep.
Sleep 1998;21(7):677-85.
1998: ML Capece; Helen A Baghdoyan; Ralph Lydic
Opioids activate G proteins in REM sleep-related brain stem nuclei of rat.
Neuroreport 1998;9(13):3025-8.
1998: Helen A Baghdoyan; Ralph Lydic; M A Fleegal
M2 muscarinic autoreceptors modulate acetylcholine release in the medial pontine reticular formation.
The Journal of pharmacology and experimental therapeutics 1998;286(3):1446-52.
1998: ML Capece; Helen A Baghdoyan; Ralph Lydic
Carbachol stimulates [35S]guanylyl 5'-(gamma-thio)-triphosphate binding in rapid eye movement sleep-related brainstem nuclei of rat.
The Journal of neuroscience : the official journal of the Society for Neuroscience 1998;18(10):3779-85.
1997: Helen A Baghdoyan
Location and quantification of muscarinic receptor subtypes in rat pons: implications for REM sleep generation.
The American journal of physiology 1997;273(3 Pt 2):R896-904.
1997: A U Höglund; Helen A Baghdoyan
M2, M3 and M4, but not M1, muscarinic receptor subtypes are present in rat spinal cord.
The Journal of pharmacology and experimental therapeutics 1997;281(1):470-7.
1996: M T Roth; M A Fleegal; Ralph Lydic; Helen A Baghdoyan
Pontine acetylcholine release is regulated by muscarinic autoreceptors.
Neuroreport 1996;7(18):3069-72.
1996: J C Keifer; Helen A Baghdoyan; Ralph Lydic
Pontine cholinergic mechanisms modulate the cortical electroencephalographic spindles of halothane anesthesia.
Anesthesiology 1996;84(4):945-54.
1995: S L Shuman; ML Capece; Helen A Baghdoyan; Ralph Lydic
Pertussis toxin-sensitive G proteins mediate carbachol-induced REM sleep and respiratory depression.
The American journal of physiology 1995;269(2 Pt 2):R308-17.
1995: V J Mallios; Ralph Lydic; Helen A Baghdoyan
Muscarinic receptor subtypes are differentially distributed across brain stem respiratory nuclei.
The American journal of physiology 1995;268(6 Pt 1):L941-9.
1995: A Cronin; J C Keifer; Helen A Baghdoyan; Ralph Lydic
Opioid inhibition of rapid eye movement sleep by a specific mu receptor agonist.
British journal of anaesthesia 1995;74(2):188-92.
1994: Helen A Baghdoyan; V J Mallios; R B Duckrow; Deborah C Mash
Localization of muscarinic receptor subtypes in brain stem areas regulating sleep.
Neuroreport 1994;5(13):1631-4.
1994: B X Carlson; Helen A Baghdoyan
Pentobarbital differentially enhances the affinity of [3H]flunitrazepam binding across brain regions.
Pharmacology 1994;49(1):1-10.
1994: Helen A Baghdoyan; B X Carlson; M T Roth
Pharmacological characterization of muscarinic cholinergic receptors in cat pons and cortex. Preliminary study.
Pharmacology 1994;48(2):77-85.
1994: J C Keifer; Helen A Baghdoyan; L Becker; Ralph Lydic
Halothane decreases pontine acetylcholine release and increases EEG spindles.
Neuroreport 1994;5(5):577-80.
1993: Ralph Lydic; J C Keifer; Helen A Baghdoyan; L Becker
Microdialysis of the pontine reticular formation reveals inhibition of acetylcholine release by morphine.
Anesthesiology 1993;79(5):1003-12.
1993: Ralph Lydic; Helen A Baghdoyan
Pedunculopontine stimulation alters respiration and increases ACh release in the pontine reticular formation.
The American journal of physiology 1993;264(3 Pt 2):R544-54.
1993: Helen A Baghdoyan; J L Spotts; S G Snyder
Simultaneous pontine and basal forebrain microinjections of carbachol suppress REM sleep.
The Journal of neuroscience : the official journal of the Society for Neuroscience 1993;13(1):229-42.
1992: B X Carlson; A M Mans; R A Hawkins; Helen A Baghdoyan
Pentobarbital-enhanced [3H]flunitrazepam binding throughout the rat brain: an autoradiographic study.
The Journal of pharmacology and experimental therapeutics 1992;263(3):1401-14.
1992: J C Keifer; Helen A Baghdoyan; Ralph Lydic
Sleep disruption and increased apneas after pontine microinjection of morphine.
Anesthesiology 1992;77(5):973-82.
1991: Ralph Lydic; Helen A Baghdoyan; Z Lorinc
Microdialysis of cat pons reveals enhanced acetylcholine release during state-dependent respiratory depression.
The American journal of physiology 1991;261(3 Pt 2):R766-70.
1991: Ralph Lydic; Helen A Baghdoyan; R Wertz; D P White
Cholinergic reticular mechanisms influence state-dependent ventilatory response to hypercapnia.
The American journal of physiology 1991;261(3 Pt 2):R738-46.
1991: Ralph Lydic; Helen A Baghdoyan; L Hibbard; E V Bonyak; M Regina DeJoseph; Richard A Hawkins
Regional brain glucose metabolism is altered during rapid eye movement sleep in the cat: a preliminary study.
The Journal of comparative neurology 1991;304(4):517-29.
1989: Ralph Lydic; Helen A Baghdoyan
Cholinoceptive pontine reticular mechanisms cause state-dependent respiratory changes in the cat.
Neuroscience letters 1989;102(2-3):211-6.
1989: Ralph Lydic; Helen A Baghdoyan; C W Zwillich
State-dependent hypotonia in posterior cricoarytenoid muscles of the larynx caused by cholinoceptive reticular mechanisms.
FASEB journal : official publication of the Federation of American Societies for Experimental Biology 1989;3(5):1625-31.
1989: Helen A Baghdoyan; Ralph Lydic; Clifton Callaway; J Allan Hobson
The carbachol-induced enhancement of desynchronized sleep signs is dose dependent and antagonized by centrally administered atropine.
Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology 1989;2(1):67-79.
1987: Helen A Baghdoyan; Ralph Lydic; Clifton Callaway; J Allan Hobson
Increased ponto-geniculo-occipital (PGO) wave frequency following central administration of neostigmine.
Neuroscience letters 1987;82(3):278-84.
1987: Helen A Baghdoyan; M L Rodrigo-Angulo; R W McCarley; J Allan Hobson
A neuroanatomical gradient in the pontine tegmentum for the cholinoceptive induction of desynchronized sleep signs.
Brain research 1987;414(2):245-61.
1987: Clifton Callaway; Ralph Lydic; Helen A Baghdoyan; J Allan Hobson
Pontogeniculooccipital waves: spontaneous visual system activity during rapid eye movement sleep.
Cellular and molecular neurobiology 1987;7(2):105-49.
1984: Helen A Baghdoyan; A P Monaco; M L Rodrigo-Angulo; F Assens; R W McCarley; J Allan Hobson
Microinjection of neostigmine into the pontine reticular formation of cats enhances desynchronized sleep signs.
The Journal of pharmacology and experimental therapeutics 1984;231(1):173-80.
1984: A P Monaco; Helen A Baghdoyan; J P Nelson; J Allan Hobson
Cortical wave amplitude and eye movement direction are correlated in REM sleep but not in waking.
Archives italiennes de biologie 1984;122(3):213-23.
1984: Helen A Baghdoyan; M L Rodrigo-Angulo; R W McCarley; J Allan Hobson
Site-specific enhancement and suppression of desynchronized sleep signs following cholinergic stimulation of three brainstem regions.
Brain research 1984;306(1-2):39-52.