Antagonistic effect of urea on oxygenation-linked binding of ATP in an elasmobranch hemoglobin.

abstract：:The aggregation of melanin-granules within fish pigment cells (melanophores) can be elicited either by electrical stimulation of intrinsic nerves or by the addition of adrenergic agonists. The pigment aggregation seems to be mediated by alpha-2-adrenoceptors. In this investigation we have used various agonists and ant...

journal_title：Life sciences

authors： Karlsson JO,Grundström N,Wikberg JE,Friedman R,Andersson RG

更新日期：1985-09-16 00:00:00

abstract：AIMS:GnRH-DFF40 (gonadotropin releasing hormone-DNA fragmentation factor 40) humanized recombinant immunotoxin serves as a prospective candidate for targeted therapy of malignancies with over-expressed gonadotropin releasing hormone receptor (GnRHR). In this study, we attempted to generate a GnRH-based chimeric protein...

journal_title：Life sciences

authors： Barazesh M,Mohammadi S,Jalili S,Kavousipour S,Faraji SN,Mokarram P,Pirhadi S

更新日期：2021-01-15 00:00:00

abstract：:We investigated the inhibition of human cholinesterases by galanthamine, an alkaloid of the common snowdrop (galanthus nivalis). In vitro, the compound showed potent enzyme inhibition and 50-fold selectivity for acetylcholinesterase (EC 3.1.1.7) as opposed to butyrylcholinesterase (EC 3.1.1.8). There was no difference...

journal_title：Life sciences

authors： Thomsen T,Kewitz H

更新日期：1990-01-01 00:00:00

abstract：AIMS:Cisplatin (CDDP) is a potent anticancer agent, but severe renal toxicity can limit its use. We investigated the protective effect of cepharanthin (CE), a biscoclaurin alkaloid, on the renal toxicity of CDDP. MAIN METHODS:Mice were given CDDP along with CE. Effects of CE on CDDP toxicity were investigated by assay...

journal_title：Life sciences

authors： Sogawa N,Hirai K,Sogawa C,Ohyama K,Miyazaki I,Tsukamoto G,Asanuma M,Sasaki A,Kitayama S

更新日期：2013-04-09 00:00:00

abstract：:The optical isomers of apomorphine (APO) and N-propylnorapomorphine (NPA) were interacted with three biochemical indices of dopamine (DA) receptors in extrapyramidal and limbic preparations of rat brain tissue. There were consistent isomeric preferences for the R(-) configuration of both DA analogs in stimulating aden...

journal_title：Life sciences

authors： Kula NS,Baldessarini RJ,Bromley S,Neumeyer JL

更新日期：1985-09-16 00:00:00

abstract：:We used in vitro quantitative autoradiography to investigate changes in neurotransmitter receptor binding, including muscarinic cholinergic, PCP, GABAA, benzodiazepine, D1 and 5-HT2A receptor, in the brains of aged rats, compared with such binding in young rats. Scatchard analysis revealed that the maximal number of b...

journal_title：Life sciences

authors： Nabeshima T,Yamada K,Hayashi T,Hasegawa T,Ishihara S,Kameyama T,Morimasa T,Kaneyuki T,Shohmori T

更新日期：1994-01-01 00:00:00

abstract：:In this study we analyzed the N-formyl-Met-Leu-Phe (fMLP)-induced calcium signal in alveolar macrophages (AM) isolated from ovalbumin-sensitized (OA-sensitized AM) and naive (naive AM) guinea-pigs. Guinea-pigs were sensitized by subcutaneous injection of OA and AM were isolated by bronchoalveolar lavage 6 weeks therea...

journal_title：Life sciences

authors： Failli P,Bindi D,Franceschelli F,Tanini A,Ciuffi M,Mazzetti L,Zilletti L

更新日期：2001-08-24 00:00:00

abstract：:Ketamine, used clinically as an intravenous analgetic and dissociative anaesthetic agent, is a racemate with both pharmacokinetic and pharmacodynamic enantioselectivity. S-ketamine has been found have a higher clearance and greater potency than R-ketamine as well as a greater therapeutic index. We performed a study in...

journal_title：Life sciences

authors： Edwards SR,Mather LE

更新日期：2001-09-14 00:00:00

abstract：:Human uridinediphosphate-glucuronosyltransferase 1A1 (UGT1A1) was expressed in Salmonella typhimurium TA1535 cells by transfection of the cells with plasmids carrying the UGT1A1 cDNA. UGT1A1 cDNA was isolated by a polymerase chain reaction from human liver total RNA and was inserted into the pSE420 plasmid, linked to ...

journal_title：Life sciences

authors： Fujita K,Mogami A,Hayashi A,Kamataki T

更新日期：2000-04-07 00:00:00

abstract：:Glucocorticoid receptors (GR) are ubiquitous molecules and are present also in the hippocampus and in several other nervous and immune tissues. Peripheral blood mononuclear cells (PBMCs) are a good model for studies of GR in humans. Glucocorticoids are important for maintaining cellular and humoral homeostasis and are...

journal_title：Life sciences

authors： Grasso G,Lodi L,Lupo C,Muscettola M

更新日期：1997-01-01 00:00:00

abstract：:Superoxide dismutase (SOD), neuron specific enolase (NSE) and lactic dehydrogenase (LDH) were measured in the serum and cerebrospinal fluid (CSF) of ischemic cerebrovascular patients, other neurological patients and in age-matched healthy controls (serum only). The levels of SOD in the CSF or serum of the ischemic pat...

journal_title：Life sciences

authors： Gruener N,Gross B,Gozlan O,Barak M

更新日期：1994-01-01 00:00:00

abstract：:The association of [3H] [D-Ala2, D-Leu5] enkephalin ([3H]DADLE]) with mouse neuroblastoma cells (N4TG1) was investigated. Under identical conditions the time course, dose response curve and temperature dependence for ligand uptake were similar to those for ligand-induced receptor loss (down regulation). Uptake of [3H]...

journal_title：Life sciences

authors： Blanchard SG,Chang KJ,Cuatrecasas P

更新日期：1982-09-20 00:00:00

abstract：:Nitric oxide (NO) may be an intercellular modulator within the central nervous system. L-arginine, which results in NO synthesis, increased food intake in mice while the inhibitor of NO synthesis, L-NG-nitro arginine (L-NO Arg) inhibited food intake in food deprived mice. L-arginine, but not D-arginine, partially reve...

journal_title：Life sciences

authors： Morley JE,Flood JF

更新日期：1991-01-01 00:00:00

abstract：AIMS:Asymmetric dimethylarginine (ADMA) is an endogenous competitive inhibitor of nitric oxide (NO) synthase, an enzyme responsible for the generation of NO. Plasma concentrations of ADMA increase in the elderly and in postmenopausal women. In fact, an elevated ADMA level is a risk factor of cardiovascular disease. Aer...

journal_title：Life sciences

authors： Tanahashi K,Akazawa N,Miyaki A,Choi Y,Ra SG,Matsubara T,Kumagai H,Oikawa S,Miyauchi T,Maeda S

更新日期：2014-07-11 00:00:00

abstract：:Intestinal mucosal capsaicin-sensitive afferent nerves mediate, in part, the mesenteric hyperemia after intraduodenal acidification. The hyperemia plays a role in protecting the duodenal mucosa against acid damage. We tested the hypothesis that bradykinin contributes to this protective hyperemia. A specific antagonist...

journal_title：Life sciences

authors： Leung FW,Iwata F,Kao J,Seno K,Itoh M,Leung JW

更新日期：2002-01-04 00:00:00

abstract：AIMS:The clinical utilization of the combinations of all-trans-retinoic acid (RA) with antiestrogens, which present synergism of action in breast cancer, has been limited by RA adverse effects, including hepatotoxicity, which may be related with mitochondrial damage. This work evaluated the effects of RA alone and in c...

journal_title：Life sciences

authors： Ribeiro MP,Santos AE,Santos MS,Custódio JB

更新日期：2013-07-30 00:00:00

abstract：:Partially purified fractions from sheep pineal gland extracts, which show a fluorescence like pteridines, were shown to suppress the enzyme hydroxy-indole-o-methyltransferase (HIOMT) isolated from avian pineals and retinas. The results described demonstrate that the mechanism of inhibition of HIOMT activity is indepen...

journal_title：Life sciences

authors： Ebels I,Cremer-Bartels G

更新日期：1982-04-19 00:00:00

abstract：:The effect of diabetes mellitus on serum cholesterol and aortic microsomal prostanoid synthesis was studied in cholesterol fed male Lewis rats. Normal, diabetic and diabetic rats treated with pancreatic islets were divided into three diet subgroups, control diet, control +2% cholesterol for 8 weeks and control +2% cho...

journal_title：Life sciences

authors： Myers SI,Bartula L,Linzel M,Phan T,Jung PJ,Merrell RC

更新日期：1990-01-01 00:00:00

abstract：:Utilizing a nine amino-acid (Asp-Glu-Leu-Tyr-Pro-Leu-Glu-Val-Glu) non-enkephalin containing fragment of Peptide F from the pro-enkephalin molecule, a radioimmunoassay was developed. Extraction of bovine, rat, and guinea pig adrenomedullary preparations demonstrated this fragment to be present and apparently partially ...

journal_title：Life sciences

authors： Alessi N,Taylor L,Akil H

更新日期：1982-10-18 00:00:00

abstract：:Leukemias are a heterogenous group of diseases characterized by uncontrolled proliferation of abnormal blood cells of hematopoietic system. Evodiamine, a characteristic alkaloid extracted from Evodia fruits, has been reported to exhibit inhibitory effect on cell proliferation and migration in several types of cancer c...

journal_title：Life sciences

authors： Huang YC,Guh JH,Teng CM

更新日期：2004-05-21 00:00:00

abstract：:Adenylate cyclase activity in isolated rat liver plasma membranes was inhibited by NADH in a concentration-dependent manner. Half-maximal inhibition of adenylate cyclase was observed at 120 microM concentration of NADH. The effect of NADH was specific since adenylate cyclase activity was not altered by NAD+, NADP+, NA...

journal_title：Life sciences

authors： Nair BG,Patel TB

更新日期：1991-01-01 00:00:00

abstract：AIMS:Dorsal root ganglia contain heterogeneous populations of primary afferent neurons that transmit various sensory stimuli. This functional diversity may be correlated with differential expression of voltage-gated K(+) (Kv) channels. Here, we examine cellular distributions of Kv4 pore-forming and ancillary subunits t...

journal_title：Life sciences

authors： Matsuyoshi H,Takimoto K,Yunoki T,Erickson VL,Tyagi P,Hirao Y,Wanaka A,Yoshimura N

更新日期：2012-09-17 00:00:00

abstract：AIMS:Individual susceptibility to develop obesity may impact the development of cardio-metabolic risk factors that lead to obesity-related comorbid conditions. Obesity-prone Osborne-Mendel (OM) rats expressed higher levels of visceral adipose inflammation than obesity-resistant, S5B/Pl (S5B) rats. However, the consumpt...

journal_title：Life sciences

authors： Poret JM,Battle C,Mouton AJ,Gaudet DA,Souza-Smith F,Gardner JD,Braymer HD,Harrison-Bernard L,Primeaux SD

更新日期：2019-04-15 00:00:00

abstract：:The elevated plus-maze test has been widely used for screening of anxiolytic drugs and for exploring neurobiological bases of anxiety. In this study, we validated a new automated system that enables to record exploratory behavior in the elevated plus-maze test. This system, called cyberplus, consisted of ten pairs of ...

journal_title：Life sciences

authors： Torres C,Escarabajal MD

更新日期：2002-03-01 00:00:00

abstract：:Site-directed mutagenesis has been used to evaluate the roles of the key aspartate and arginine residues in transmembrane domain three of the muscarinic receptors. The results suggest that the formation of an ionic bond between the Asp carboxylate group and the onium headgroup is essential to anchor acetylcholine in i...

journal_title：Life sciences

authors： Hulme EC,Curtis CA,Page KM,Jones PG

更新日期：1995-01-01 00:00:00

abstract：:Abbott-81282 (A-81282) has been identified among a series of related compounds as being a highly potent and selective antagonist of angiotensin receptors. At AT1 receptors of the rabbit aorta, A-81282 exhibited a pA2 of 9.64 (+/- 0.33) vs. angiotensin-II, and demonstrated characteristics consistent with competitive an...

journal_title：Life sciences

authors： Hancock AA,Buckner SA,Lee JY,Brune M,Morse PA,Oheim K,Warner RB,Winn M,Zydowsky TM,De B

更新日期：1993-01-01 00:00:00

abstract：AIMS:Ventilatory disturbance is a fatal side-effect of opioid analgesics. Separation of analgesia from ventilatory depression is important for therapeutic use of opioids. It has been suggested that opioid-induced ventilatory depression results from a decrease in adenosine 3',5'-cyclic monophosphate content in the respi...

journal_title：Life sciences

authors： Kimura S,Ohi Y,Haji A

更新日期：2015-04-15 00:00:00

abstract：:Preconditioning (PC) is a potential approach to myocardial protection. We hypothesize that brief ischemia or adenosine given prior to an extended period of warm ischemia may prevent myocardial stunning by altering myocardial metabolism. Using a global ischemia model, 19 dogs were subjected to no PC(control), two episo...

journal_title：Life sciences

authors： Phillips AB,Ko W

更新日期：2007-10-13 00:00:00

abstract：:Decreased heart rate variability (HRV) and heart rate turbulence (HRT) are independent predictors of mortality after acute myocardial infarction (AMI). There are no previous studies on the relationship between warm-up phenomenon and cardiac autonomic control in stable coronary artery disease (CAD). We investigated the...

journal_title：Life sciences

authors： Tuomainen P,Hartikainen J,Vanninen E,Peuhkurinen K

更新日期：2005-03-25 00:00:00

abstract：AIMS:Diabetes increases oxidant stress and impairs endothelium-dependent relaxation. We investigated whether the antioxidant 3',4'-dihydroxyflavonol (DiOHF) reduces the release of superoxide (O(2)(-)) and preserves endothelial function in aortae from diabetic rats. MAIN METHODS:Type-1 diabetes was induced in Sprague-D...

journal_title：Life sciences

authors： Woodman OL,Malakul W

更新日期：2009-07-03 00:00:00