Steven L. Cohen , Barbara J. Morley , O.Carter Snead
{"title":"An EEG analysis of convulsive activity produced by cholinergic agents","authors":"Steven L. Cohen , Barbara J. Morley , O.Carter Snead","doi":"10.1016/0364-7722(81)90089-8","DOIUrl":"10.1016/0364-7722(81)90089-8","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. EEG activity was assessed in rats following the intraventricular injection of cholinergic agonists (carbamylcholine and nicotine tartrate), nicotinic antagonists (d-tubocurarine and <em>α</em>-bungarotoxin), ganglionic blockers (mecamylamine and hexamethonium), decamethonium, antibodies prepared against purified electric fish acetylcholine receptor, and human sera from myasthenic and epileptic patients.</p></span></li><li><span>2.</span><span><p>2. Seizures were produced only by agonists and nicotinic antagonists.</p></span></li><li><span>3.</span><span><p>3. Carbamylcholine produced clonic/tonic convulsions. Nicotine resulted in a depressed EEG with sporadic seizures.</p></span></li><li><span>4.</span><span><p>4. Both antagonists produced clonic/tonic seizures and spike activity. Carbamylcholine-induced seizures were blocked by scopolamine.</p></span></li><li><span>5.</span><span><p>5. No agent was found to block antagonist-induced seizures.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 4","pages":"Pages 383-388"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90089-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17186519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reversal of learned helplessness by nortriptyline","authors":"J.I. Telner, R.L. Singhal, Y.D. Lapierre","doi":"10.1016/0364-7722(81)90052-7","DOIUrl":"10.1016/0364-7722(81)90052-7","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. Animals exposed to inescapable stress display avoidance and escape deficits when tested in a later task situation where successful responding results in stress offset, a phenomenon termed learned helplessness. This paradigm has been suggested as an animal model of depression as it shares many of the characteristics of the human disorder.</p></span></li><li><span>2.</span><span><p>2. An escape delay procedure previously shown to reveal interference effects in mice was reproduced in rats.</p></span></li><li><span>3.</span><span><p>3. Using this escape delay procedure, the effects of acute and sub-acute administration of nortriptyline on learned helplessness behavior were assessed.</p></span></li><li><span>4.</span><span><p>4. Four and 6 days of drug treatment reversed the escape deficits produced in animals exposed to pre-shock whereas the 0 and 2 day drug regimens were without effect.</p></span></li><li><span>5.</span><span><p>5. These findings support the utility of the learned helplessness model in evaluating the potential of antidepressant agents in experimental animals.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 5","pages":"Pages 587-590"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90052-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18215412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The effects of ethanol, acetaldehyde, morphine and naloxone on histamine methyltransferase activity","authors":"George D. Prell, Irene M. Mazurkiewicz-Kwilecki","doi":"10.1016/0364-7722(81)90051-5","DOIUrl":"10.1016/0364-7722(81)90051-5","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. The microassay method of Taylor and Snyder for determining the activity of histamine N-methyltransferase (E.C.2.1.1.8) (HMT), the histamine metabolizing enzyme, was modifies to permit the simultaneous measurement of histamine and HMT activity in the same tissue sample under our experimental conditions.</p></span></li><li><span>2.</span><span><p>2. The synthesis and purification of τ-methyl-[<sup>14</sup>C]-histamine was performed to assess the efficiency of extraction of methylhistamine which in this modified methodology is approximately 80 percent.</p></span></li><li><span>3.</span><span><p>3. The influence of ethanol, acetaldehyde, morphine and naloxone alone and in combination on hypothalamic, thalamus-midbrain and cerebral cortical HMT activity was investigated at concentrations of 0.1 μM to 500 μM.</p></span></li><li><span>4.</span><span><p>4. Ethanol, acetaldehyde and ethanol in the presence of 1 μM morphine failed to markedly influence HMT activity.</p></span></li><li><span>5.</span><span><p>5. At high concentrations morphine strongly inhibited while naloxone enhanced enzyme activity. Morphine's effects on HMT remained unaltered by 1 μM naloxone.</p></span></li><li><span>6.</span><span><p>6. In the present study low concentrations of ethanol and morphine have little effect on HMT activity ‘in vitro’. These observations suggest that changes in HMT activity may play a minor role in the alcohol and morphine-induced central histamine changes observed in our previous ‘in vivo’ studies.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 5","pages":"Pages 581-585"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90051-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18351898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ethanol as the negative reinforcer in an active avoidance paradigm","authors":"Larry A. Grupp","doi":"10.1016/0364-7722(81)90075-8","DOIUrl":"10.1016/0364-7722(81)90075-8","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1) Two groups of rats were trained to jump a hurdle in order to avoid the intravenous infusion of either 800 mg/kg ethanol or saline.</p></span></li><li><span>2.</span><span><p>2) In Phase I, with the hurdle height fixed at 9″, none of the animals acquired the avoidance response. In Phase II, where the hurdle height was slowly increased from 1″ to a maximum of 10″, all of the animals receiving ethanol but none of the animals receiving saline acquired the avoidance response.</p></span></li><li><span>3.</span><span><p>3) This finding suggests that some properties of ethanol are aversive and can motivate the acquisition of an active avoidance response.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 3","pages":"Pages 241-244"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90075-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18280702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marshall B Wallach , Brian J Alps , A.Peter Roszkowski , L.David Waterbury
{"title":"The neuro- and cardiovascular pharmacology of RS-51324, a potential antidepressant","authors":"Marshall B Wallach , Brian J Alps , A.Peter Roszkowski , L.David Waterbury","doi":"10.1016/0364-7722(81)90098-9","DOIUrl":"10.1016/0364-7722(81)90098-9","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. The neuro- and cardiovascular effects of RS-51324 (DL-4(5)-(2,6dichlorophenyl)-2-methoxycarbonyl-amino-4,5 dihydroimidazole) have been explored in animals.</p></span></li><li><span>2.</span><span><p>2. Antidepressant activities of RS-51324 were demonstrated by reserpine antagonism and L-DOPA potentiation.</p></span></li><li><span>3.</span><span><p>3. Norepinephrine uptake was inhibited but MAO activity was not inhibited by RS-51324.</p></span></li><li><span>4.</span><span><p>4. Peripheral vascular responses to serotonin were potentiated although central effects were not demonstrated.</p></span></li><li><span>5.</span><span><p>5. Cardiovascular experiments indicated that RS-51324 lacked anticholinergic effects but had mild antihistaminic activity.</p></span></li><li><span>6.</span><span><p>6. RS-51324 potentiated tyramine-induced pressor responses.</p></span></li><li><span>7.</span><span><p>7. RS-51324 lacks centrally acting skeletal muscle relaxant activity.</p></span></li><li><span>8.</span><span><p>8. The LD<sub>50</sub> of RS-51324 was greater than 2 gm/kg.</p></span></li><li><span>9.</span><span><p>9. RS-51324 appears to be a membrane-pump inhibiting compound with probable antidepressant activity.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"4 6","pages":"Pages 569-584"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90098-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18235587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Communication from the viewpoint of the European Regional Reference Center","authors":"Hans Feer","doi":"10.1016/0364-7722(81)90070-9","DOIUrl":"10.1016/0364-7722(81)90070-9","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. The number of psychotropic drugs and the literature on them is rising from year to year. The publications from the International Reference Center for Psychotropic Drugs (Psychopharmacology Bulletin, Psychotropic Drug Index and Mental Health Literature) help to codify this stream of information.</p></span></li><li><span>2.</span><span><p>2. The Committee for the Prophylaxis and Therapy of Depressions founded in 1975 aims at keeping physicians outside psychiatry up-to-date with the pharmacotherapy and clinical picture of depressions. The fact that the Psychiatric University Clinic of Basle combines the activities of the Committee with those of a Regional Reference Center is very favourable as the two organizations are complementary.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 2","pages":"Pages 197-200"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90070-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18280700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Decreased tryptophan availability in endogenous depression caused by disturbed plasma leucine clearance","authors":"Svend E. Møller, Lars Kirk","doi":"10.1016/0364-7722(81)90080-1","DOIUrl":"10.1016/0364-7722(81)90080-1","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. Brain uptake of tryptophan is regulated in part by competition from other plasma amino acids, e.g. leucine.</p></span></li><li><span>2.</span><span><p>2. Following oral L-leucine loading, plasma leucine clearance was normal in 3 depressives but decreased in one depressive who subsequently reacted to L-tryptophan treatment.</p></span></li><li><span>3.</span><span><p>3. It is suggested that a disturbed leucine clearance causes dietary leucine to remain elevated in plasma and that this effect, in turn, reduces brain uptake of tryptophan, and serotonin synthesis.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 3","pages":"Pages 277-279"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90080-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18280706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of a piperazine derivative, piribedil, on exploration, locomotor activity and social behaviour in the rat","authors":"Sandra E. File","doi":"10.1016/0364-7722(81)90076-X","DOIUrl":"10.1016/0364-7722(81)90076-X","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. The piperazine derivative, piribedil (ET495), in doses ranging from 10 to 100 mg/kg reduced locomotor activity and exploration in rats naive to the holeboard, but had less effect on exploration and was without effect on locomotor activity in rats familiar with the apparatus.</p></span></li><li><span>2.</span><span><p>2. Doses of 5–100 mg/kg disrupted the usual between-day decrement in exploration and locomotor activity, but did not change the increase in head-dipping when novel objects were introduced on the second day.</p></span></li><li><span>3.</span><span><p>3. ET495 and amphetamine counteracted each other's effects on locomotor activity, but had similar and additive effects on exploration.</p></span></li><li><span>4.</span><span><p>4. Haloperidol did not antagonise the effects of ET495.</p></span></li><li><span>5.</span><span><p>5. ET495 (0.5 & 1 mg/kg) increased social interaction between male rats when they were tested in an unfamiliar arena, but was without effect in a familiar one.</p></span></li><li><span>6.</span><span><p>6. The effects of ET495 are dependent on the animal's familiarity with the test arena, but over the dose-range tested (0.5 to 100 mg/kg) there was no evidence of low doses acting on presynaptic receptors to produce stimulation of locomotor activity or exploration. The enhanced social interaction found after low doses might reflect a presynaptic action.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 3","pages":"Pages 245-255"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90076-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18280703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Discriminative stimulus properties of cocaine related to an anxiogenic action","authors":"Gary T. Shearman, Harbans Lal","doi":"10.1016/0364-7722(81)90005-9","DOIUrl":"10.1016/0364-7722(81)90005-9","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. Male hooded rats were trained to discriminate the anxiogenic action of phentylenetetrazol by responding for food reinforcement with a lever located on one side of a food cup 15 min following a 20 mg/kg pentylenetetrazol injection and responding with the lever located on the alternate side of the food cup 15 min following a 1 ml/kg saline injection.</p></span></li><li><span>2.</span><span><p>2. Cocaine (20 mg/kg) but not diazepam (5 mg/kg) nor haloperidol (0.16 or 0.64 mg/kg) significantly generalized to the pentylenetrazol discriminative stimulus.</p></span></li><li><span>3.</span><span><p>3. Diazepam (5 mg/kg) but not haloperidol (0.16 or 0.64 mg/kg) significantly antagonized the discriminative stimuli produced by pentylenetetrazol and cocaine.</p></span></li><li><span>4.</span><span><p>4. These data suggest that cocaine produces discriminative stimulus that is related to its anxiogenic action.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 1","pages":"Pages 57-63"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90005-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18212455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Regional redistribution of β-endorphin in the rat brain: The effect of stress","authors":"Alice Barta, Kiran Yashpal","doi":"10.1016/0364-7722(81)90054-0","DOIUrl":"https://doi.org/10.1016/0364-7722(81)90054-0","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. After an acute mild swim (20°, 3 min), levels of β-endorphin-like immunoreactivity decreased in the anterior pituitary to 48% of controls and in the intermediate-posterior pituitary to 62%. In the brain, of the 14 regions examined, four showed remarkable increases: central n. of amygdala to 167%, n. interstitialis striae terminalis to 174%, n. raphe dorsalis to 170%, and n. paraventricularis to 136%.</p></span></li><li><span>2.</span><span><p>2. An acute severe swim (4°, 3 min) caused a decrease of the opioid to 66% and 93% of controls in the anterior and intermediate-posterior pituitary, respectively, and an increase in central n. of amygdala to 227%, in n. interstitialis striae terminalis to 173%, in n. raphe magnus to 148%, in n. paraventricularis to 155%, and in periaqueductal gray (PAG) to 193%.</p></span></li><li><span>3.</span><span><p>3. Mild swimmings applied chronically for 21 days resulted in return of the opioid levels nearly to control values as habituation developed.</p></span></li><li><span>4.</span><span><p>4. After chronic swimmings of gradually increased severity during the 21 day period (water temperature gradually decreased from 20° to 4° and the time of swimming gradually increased from 3 to 9 min), no habituation occurred but further increases in β-endorphin-like immunoreactivity were observed.</p></span></li><li><span>5.</span><span><p>5. The present results show that stress of swimming affects pituitary and brain levels of β-endorphin and that in brain, the most affected are areas of midbrain and limbic structures. These effects are reversed by repeated exposure to mild swimming conditions, but not when the conditions of swimming gradually increase in severity.</p></span></li></ul></div>","PeriodicalId":20801,"journal":{"name":"Progress in neuro-psychopharmacology","volume":"5 5","pages":"Pages 595-598"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0364-7722(81)90054-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91624154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}