Regulatory effects of acutely repeated nicotine treatment towards central muscarinic receptors.

abstract：:The effects of longer lasting blood pressure changes on the release of endogenous catecholamines (CA) in limbic and hypothalamic areas were studied in anaesthetized rats. For this purpose the central nucleus of the amygdala (AC), ventral hippocampus (VH) and medial hypothalamus (MH) were simultaneously superfused thro...

journal_title：Life sciences

authors： Dietl H

更新日期：1987-07-13 00:00:00

abstract：:Castration increases the central nervous system (CNS) sensitivity to hexobarbital as measured by an EEG-threshold method. Testosterone treatment in doses from 1 to 5 mg/kg/day decreases CNS-sensitivity and restores threshold values in castrated rats to a level found in normal young adult male rats. ...

journal_title：Life sciences

authors： Bolander HG,Kourtopoulos H

更新日期：1985-03-11 00:00:00

abstract：:Diazepam binding inhibitor (DBI) is a 9-kD polypeptide that was first isolated in 1983 from rat brain by monitoring its ability to displace diazepam from the benzodiazepine (BZD) recognition site located on the extracellular domain of the type A receptor for gamma-aminobutyric acid (GABAA receptor) and from the mitoch...

journal_title：Life sciences

authors： Costa E,Guidotti A

更新日期：1991-01-01 00:00:00

abstract：:The effects of caffeine (Cf), theophylline (Tph) and theobromine (Tb) on the adrenal cortex were studied. No direct effect (hypophysectomized: hypo(-) rats) was observed with any of the three methyl-xanthines (MX) after chronic oral administration (5 days). An indirect effect (via the hypothalamo-hypophyseal-adrenal a...

journal_title：Life sciences

authors： Okyayuz GI,Ventura MA,Gardey C,Rey E,Thiroux G

更新日期：1985-09-30 00:00:00

abstract：:The modulation of Ca2+ release by synthetic bee venom melittin was examined in equine and human terminal cisternae-containing fractions. Melittin (0.1 microM) decreased the threshold of Ca(2+)-induced Ca2+ release by 20% in equine muscle and by 36% in human muscle. If terminal cisternae fractions were first preloaded ...

journal_title：Life sciences

authors： Fletcher JE,Tripolitis L,Beech J

更新日期：1992-01-01 00:00:00

abstract：AIMS:Endoplasmic reticulum stress (ERS) as an emerging factor is involved in insulin resistance (IR), which is the pathological basis of diabetes mellitus. Accumulation of asymmetric dimethylarginine (ADMA), an endogenous inhibitor of nitric oxide synthase is associated with IR, but the underlying mechanisms have not b...

journal_title：Life sciences

authors： Qiu N,Wei XM,Zhang ZJ,He YL,Zhou XK,Xiong Y

更新日期：2020-11-01 00:00:00

abstract：AIMS:Although approving new anticonvulsants was a major breakthrough in the field of epilepsy control, so far we have met limited success in almost one third of patients suffering from epilepsy and a definite and reliable method is yet to be found. Levosimendan demonstrated neuroprotective effects and reduced mortality...

journal_title：Life sciences

authors： Gooshe M,Tabaeizadeh M,Aleyasin AR,Mojahedi P,Ghasemi K,Yousefi F,Vafaei A,Amini-Khoei H,Amiri S,Dehpour AR

更新日期：2017-01-01 00:00:00

abstract：:The neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is rapidly metabolized to a 1-methyl-4-phenylpyridinium species (MPP+) in the squirrel monkey. After administration of toxic doses of MPTP, the concentration of MPP+ in the substantia nigra appears to increase during the first 72 hours, reaching the hi...

journal_title：Life sciences

authors： Irwin I,Langston JW

更新日期：1985-01-21 00:00:00

abstract：:The energy balance equation applicable to all living organisms was used as a framework on which to construct a critical review of some of the more controversial aspects of the obesity problem. The equation matches energy intake against all the known forms of work that the body does in utilizing that energy, including ...

journal_title：Life sciences

authors： Rampone AJ,Reynolds PJ

更新日期：1988-01-01 00:00:00

abstract：:Because of the low selectivity of available ligands, pharmacological approaches to elucidate the functional difference among muscarinic acetylcholine receptor (mAChR) subtypes have been problematic. As an alternative approach, we have established a series of mutant mouse lines deficient in each mAChR subtype (mAChR KO...

journal_title：Life sciences

authors： Matsui M,Yamada S,Oki T,Manabe T,Taketo MM,Ehlert FJ

更新日期：2004-11-05 00:00:00

abstract：:To assess the possible role of altered central serotonin function in psychiatric disorders, investigators have utilized pharmacological challenge testing with an amino acid mixture to decrease blood tryptophan concentration and, indirectly, brain serotonin levels. The aim of this pilot study was to assess the effectiv...

journal_title：Life sciences

authors： Wolfe BE,Metzger ED,Jimerson DC

更新日期：1995-03-17 00:00:00

abstract：:Systemic administration of the selective D1 antagonist, SCH 23390, caused significant motor changes in healthy African green monkeys. The effects included the parkinsonian signs of motor freezing, incoordination, bradykinesia, poverty of movement, tremor and depressed blink rate. SCH 23390 administered to MPTP-treated...

journal_title：Life sciences

authors： Lawrence MS,Redmond DE Jr,Elsworth JD,Taylor JR,Roth RH

更新日期：1991-01-01 00:00:00

abstract：AIMS:To design and screen a potent GLP-1/GIP/Gcg receptors triagonist with therapeutic potential in rodent animals with diabetes and obesity. MAIN METHODS:First, we obtained a 12-mer dual GIP/Gcg receptor agonist from a large combinatorial peptide library via high-throughput screening technique and then fused to the E...

journal_title：Life sciences

authors： Cui J,Shang A,Wang W,Chen W

更新日期：2020-11-01 00:00:00

abstract：:In saturation binding experiments, (+)pentazocine, (+)3-(3-hydroxyphenyl)-N-propylpiperidine (3-PPP), haloperidol and rimcazole did not inhibit the binding of [3H]DTG in a purely competitive fashion. Although Scatchard analysis indicated that [3H]DTG bound to a single site, the inhibition curves of some, but not all, ...

journal_title：Life sciences

authors： DeHaven-Hudkins DL,Fleissner LC

更新日期：1992-01-01 00:00:00

abstract：:Infusion of oxytocin (OT) into normal dogs, in doses which produced plasma levels of OT in the physiological range, has been shown to increase plasma levels of glucose, insulin and glucagon and increase rates of glucose production and uptake. This study sought to determine whether there was a correlation between these...

journal_title：Life sciences

authors： Altszuler N,Rosenberg CR,Winkler B,Fuchs AR,Hill PS,Hruby VJ

更新日期：1992-01-01 00:00:00

abstract：:Extracts of Hypericum perforatum (St. John's wort) have antidepressant properties in depressed patients and exert antidepressant-like action in laboratory animals. The phloroglucinol derivative hyperforin has become a topic of interest, as this Hypericum component is a potent inhibitor of monoamines reuptake. The mole...

journal_title：Life sciences

authors： Roz N,Rehavi M

更新日期：2003-06-13 00:00:00

abstract：:We examined the effects of various oleanolic acid oligoglycosides obtained from traditional herbs on ethanol- or indomethacin-induced gastric mucosal lesions in rats and on gastric secretion in pylorus-ligated rats. Test samples were given orally to fasted rats 1 h before absolute ethanol (1.5 ml/rat, p.o.) or indomet...

journal_title：Life sciences

authors： Matsuda H,Li Y,Murakami T,Yamahara J,Yoshikawa M

更新日期：1998-01-01 00:00:00

abstract：:Extracts of Chan Su, a traditional Chinese medication used as a topical anesthetic and cardiac medication, were incubated with cardiomyocytes that had been loaded with a calcium specific fluorescent probe. Calcium transients were measured by real-time fluorescence spectrophotometry following treatment. The transients ...

journal_title：Life sciences

authors： Bick RJ,Poindexter BJ,Sweney RR,Dasgupta A

更新日期：2002-12-27 00:00:00

abstract：:Current treatment of Alzheimer's Disease (AD) requires acetylcholinesterase inhibition to increase acetylcholine (ACh) concentrations in the synaptic cleft. Another mechanism by which ACh levels can be increased is blockade of presynaptic M2 muscarinic autoreceptors that regulate ACh release. An antagonist designed fo...

journal_title：Life sciences

authors： Lachowicz JE,Duffy RA,Ruperto V,Kozlowski J,Zhou G,Clader J,Billard W,Binch H 3rd,Crosby G,Cohen-Williams M,Strader CD,Coffin V

更新日期：2001-04-27 00:00:00

abstract：AIMS:Alterations in the expression of antioxidant enzymes are associated with changes in cancer cell sensitivity to chemotherapeutic drugs (menadione and β-lapachone). Mechanisms of acquisition of resistance to pro-oxidant drugs were investigated using a model of oxidative stress-resistant MCF-7 breast cancer cells (Re...

journal_title：Life sciences

authors： Glorieux C,Sandoval JM,Dejeans N,Ameye G,Poirel HA,Verrax J,Calderon PB

更新日期：2016-01-15 00:00:00

abstract：:The present paper describes the role of conjugating enzymes in the development of hepatotoxicity after administration of repeated doses of a novel monoamine oxidase type-A (MAO-A) inhibitor, (5R)-3-[2-(( 1S)-3-cyano-1-hydroxypropyl)benzothiazol-6-yl]-5-methoxymethyl-2-oxazolidinone (E2011). The effects of pretreatment...

journal_title：Life sciences

authors： Sato G,Aoki T,Hosokawa S,Sagami F,Tsukidate K

更新日期：2001-05-04 00:00:00

abstract：AIMS:The study investigated the antidepressant-like effect and acute toxicity of 4-phenyl-1-(phenylselanylmethyl)-1,2,3-triazole (Se-TZ), an organoselenium-containing heterocycle compound in mice. MAIN METHODS:The antidepressant-like effect of Se-TZ (1-50mg/kg) and its mechanism of action, was analyzed in the tail sus...

journal_title：Life sciences

authors： Donato F,de Gomes MG,Goes AT,Seus N,Alves D,Jesse CR,Savegnago L

更新日期：2013-09-17 00:00:00

abstract：:In rat brain microvessels, tetrahydroaminoacridine (THA) caused a significant inhibition of both acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) activities, in a dose-dependent manner. THA resulted to be a more potent inhibitor of BuChE than AChE. Lineweaver-Burk plots showed that Km (app) and V were alt...

journal_title：Life sciences

authors： Catalán RE,Martínez AM,Aragonés MD,Miguel BG,Hernández F,Cruz E

更新日期：1993-01-01 00:00:00

abstract：:We examined the effect of 7-OH-DPAT on spontaneous locomotor activity that is enhanced in diabetic mice. 7-OH-DPAT (0.1-30 mg/kg, s.c.) dose-dependently decreased the enhanced spontaneous locomotor activity in diabetic mice, but not in nondiabetic mice. When mice were pretreated with of 7-OH-DPAT (0.1 mg/kg), morphine...

journal_title：Life sciences

authors： Kamei J,Saitoh A

更新日期：1996-01-01 00:00:00

abstract：AIMS:C-reactive protein (CRP) is an inflammatory cytokine that has been shown to be an independent predictor of future atherothrombotic events. Hyperactivity of endothelin-1 (ET-1), a potent vasoconstrictor peptide produced by the endothelium, is linked with cardiovascular disease development and progression. ET-1 is s...

journal_title：Life sciences

authors： Dow CA,Templeton DL,Lincenberg GM,Greiner JJ,Stauffer BL,DeSouza CA

更新日期：2016-08-15 00:00:00

abstract：:The potencies of several opioid agonists are reduced in diabetic animals and in animals made hyperglycemic via injections of glucose. In this report we examined the effects of streptozotocin-induced diabetes on the feeding responses to centrally administered opioid agonists with differing receptor selectivities. The s...

journal_title：Life sciences

authors： Gosnell BA,Grace M,Billington CJ,Levine AS

更新日期：1989-01-01 00:00:00

abstract：:Peripheral blood cells express the complete non-neuronal cholinergic system. For example synthesis of acetylcholine and nicotinic as well muscarinic receptors have been demonstrated in leucocytes isolated from human peripheral blood. In the present experiments mononuclear cells and granulocytes were isolated from the ...

journal_title：Life sciences

authors： Neumann S,Razen M,Habermehl P,Meyer CU,Zepp F,Kirkpatrick CJ,Wessler I

更新日期：2007-05-30 00:00:00

abstract：:The secretagogue action of lipophilic, GABA-mimetic, beta-(p-chlorophenyl)-gamma-aminobutyric acid (PCPGABA) was studied in the rat in relation to body temperature. PCPGABA (2 to 8 mg/kg s.c.) stimulated acid output in the urethane-anesthetized rat whose core temperature ranged between 28 to 30 degrees C. However, thi...

journal_title：Life sciences

authors： Hara N,Hara Y,Goto Y

更新日期：1990-01-01 00:00:00

abstract：:The loss of gamma-aminobutyric acid (GABA)-ergic medium spiny neurons (MSNs) in the striatum is the hallmark of Huntington disease (HD), an incurable neurodegenerative disorder characterized by progressive motor, psychiatric, and cognitive symptoms. Transplantation of MSNs or their precursors represents a promising tr...

journal_title：Life sciences

authors： Golas MM

更新日期：2018-09-15 00:00:00

abstract：:The role of extracellular acidosis in inflammatory airway diseases is not well known. One consequence of tissue acidification is the stimulation of sensory nerves via the polymodal H(+)-gated transmembrane channels ASICs and TRPV1 receptor. The present study investigated the effect of acidosis on airway basal tone and...

journal_title：Life sciences

authors： Faisy C,Planquette B,Naline E,Risse PA,Frossard N,Fagon JY,Advenier C,Devillier P

更新日期：2007-09-08 00:00:00