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  • Suicide  (3)
  • Dopamine receptors  (2)
  • Lithium  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 93 (1987), S. 182-187 
    ISSN: 1432-2072
    Keywords: Nomifensine ; B-HT 920 ; Dopamine receptors ; Conditioning ; Dopamine-mediated behaviours ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Conditioning of behavioural effects produced by two drugs acting differently upon dopaminergic neurotransmission was studied. Nomifensine and the putative dopamine autoreceptor agonist B-HT 920 produce contrasting effects on motility, namely increases in locomotor activity and stereotypies as compared to hypokinesia and ptosis. The administration of each of these drugs (US) was repeatedly associated with well-defined environmental stimuli (CS): a wire cage associated with an auditory and on olfactory stimulus. The rats were conditioned for 7 days with 20 mg/kg nomifensine IP each day. After conditioning, the rats were treated with the solvent alone in presence of the CS. Not only did sniffing and licking occur, but also gnawing, even though the latter response was not evident after acute administration of the drug or during the conditioning period. Nomifensine (20 mg/kg IP) also acutely decreased the ratio of 3,4-dihydroxyphenylacetic acid/dopamine concentrations (DOPAC/DOPAMINE); this ratio was not altered in the conditioned rats, 60 min after solvent administration in presence of the CS. Rats were conditioned with 0.02 mg/kg IP B-HT 920 daily for 8 days. During the conditioning phase, akinesia and ptosis showed a slight enhancement and a faster onset. After conditioning, when the rats were treated with the solvent alone, the majority of them showed akinesia and/or ptosis during the observation period, in contrast to pseudoconditioned controls. When these rats were conditioned or pseudoconditioned, respectively, with B-HT 920 for further 5 days using 0.02 mg/kg again, treatment with the same dose in presence of the CS produced a significant enhancement and acceleration of these signs in conditioned as compared with pseudoconditioned control rats. The results show that stereotypies producd by nomifensine and akinesia and ptosis produced by B-HT 920 can be conditioned and that, in addition, a sign of stereotypies which was not manifest during the conditioning period appeared as conditioned response.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 335 (1987), S. 673-679 
    ISSN: 1432-1912
    Keywords: Apomorphine ; Conditioning ; Dopamine receptors ; Stereotyped behaviour ; Akinesia ptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Interactions between the direct (unconditioned) behavioural effects apomorphine and its conditioned effects after pairing with previously neutral stimuli were studied. Rats were injected once daily for 3–12 times, with apomorphine (2.0 mg/kg or 0.5 mg/kg or 0.07 mg/kg s.c. the dose kept constant in each series), in the presence of defined environmental stimuli (a wire cage in association with an acoustic and an olfactory stimulus) as conditional stimuli. The two larger doses produced stereotyped sniffing, licking, and gnawing, the smallest dose akinesia, ptosis, yawning and penile erections. During the conditioning phase, the drug produced most of the effects with increasing intensity and in the case of the stereotypies, there also was a shift to higher scores of stereotypy, with a reduced latency in onset of the signs. On the test day, 1 day after the last administration of apomorphine, the conditioned rats as well as “pseudoconditioned” controls were treated with a test dose of apomorphine in the presence of the conditional stimuli. Pseudoconditioned rats had been treated with the same pharmacological schedule of apomorphine and had the same familiarity with the stimuli, but both were kept separate. A test dose of 0.5 mg/kg of apomorphine produced stereotypies with a significantly higher score and shorter latency in onset in conditioned than in pseudoconditioned rats. Rats conditioned with the lowest dose showed a significantly longer total duration and a shorter latency in onset of akinesia and ptosis. In rats conditioned with the largest dose (2.0 mg/kg), administration of the lowest dose on the test day produced no stereotypies; neither the akinesia nor the ptosis were different between conditioned and pseudoconditioned rats, but yawning occurred with a higher frequency and a shorter latency in pseudoconditioned rats. When rats were conditioned with the lowest dose and tested with 0.5 mg/kg, the level of stereotypies was identical in both groups of rats, whereas akinesia and ptosis were not observed. Yawning and penile erections occurred more frequently, but for short periods only, in conditioned rats. The results showed that apomorphine-induced stereotypies, akinesia and ptosis could be conditioned, and the conditioned effects mimicked the unconditioned responses, which depended on the dose. Conditioned and unconditioned signs of an increased dopaminergic neurotransmission, observed after large doses of apomorphine, thus acted in a synergistic way; the same applied to conditioned and unconditioned signs observed after a small dose and were perhaps due to a decreased dopaminergic transmission. In contrast, when conditioned and unconditioned signs acted in a mutually antagonistic way (increased vs. decreased dopaminergic transmission), the unconditioned signs predominated.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 250 (2000), S. 257-261 
    ISSN: 1433-8491
    Keywords: Key words Unipolar ; Bipolar ; Depression ; Suicidality ; Suicide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of the present analyses was to evaluate differences in suicidality (past suicide attempts, suicidal thoughts at time of admission and completed suicides during the hospital stay) between bipolar and unipolar depressed inpatients. Apart from a higher frequency of past suicide attempts in bipolar depressed patients (26.6% in bipolar vs. 17.8% in unipolar patients), findings do not indicate any further differences in suicidality (suicidal thoughts (about 40% in both groups) and completed suicides during the hospital stay (0.8% in both groups)) between bipolar and unipolar patients. Factors with a predictive value for suicidal thoughts at the time of admission were a positive family history for affective disorders, past suicide attempts, and the depressive and paranoid hallucinatory syndrome (all associated with an increased risk). Female gender, an older age at hospitalisation and a longer duration of the illness were found to be associated with a lower probability for having suicidal tendencies at the time of admission. The risk for committing suicide during the hospital stay was increased if the patients had a history of past suicide attempts and suicidal thoughts at the time of admission. A more pronounced depressive syndrome at time of admission was slightly associated with a lower risk of committing suicide.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 229 (1980), S. 1-16 
    ISSN: 1433-8491
    Keywords: Manic psychoses ; Valproate ; GABA ; Lithium ; Manische Psychosen ; Valproat ; GABA ; Lithium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Unter Verwendung eines doppel-blinden ABA-Designs mit Placebo-Kontrolle wurde bei 5 Patienten mit akuter Manie eine mögliche antimanische Wirkung des GABA-ergen Anticonvulsivums Valproat untersucht. Bei 4 Patienten wurde eine deutliche Besserung beobachtet, während ein Patient auf Valproat nicht reagierte. Bei 7 weiteren Patienten mit häufig wiederkehrenden Phasen einer manischen oder maniformen schizoaffektiven Psychose, die auf die Lithium-Prophylaxe nicht ansprachen, wurde eine Dauerbehandlung mit Valproat in Kombination mit kleinen Lithium-Dosen durchgeführt. (In einem Fall wurde nur Valproat, ohne Lithium, gegeben.) Im Verlauf einer Beobachtungsphase von 1 1/2–3 Jahren wurde bei keinem dieser Patienten ein Rückfall beobachtet. Es wird die Hypothese vorgeschlagen, daß grundsätzlich GABA-erge Anticonvulsiva antimanische Eigenschaften aufweisen und daß auch der spezifische antimanische Effekt von Lithium auf einer GABA-ergen Wirkungskomponente beruht. Eine mögliche pathophysiologische Bedeutung zentraler GABA-Systeme bei affektiven und organischen Psychosen (z.B. Porphyrie, Delirium tremens) wird auf der Basis pharmakopsychiatrischer Überlegungen diskutiert.
    Notes: Summary A possible antimanic property of the GABA-ergic anticonvulsant valproate was examined by use of a double-blind placebo-controlled ABA design in 5 acutely ill manic patients. In 4 cases a marked improvement was observed after valproate medication whereas one patient showed no response. Seven further patients with frequently recurrent episodes of a manic or maniform schizoaffective psychosis, irresponsive to lithium prophylaxis, were chronically treated with valproate in combination with low doses of lithium (one case only with valproate). Over an observation period of 1 1/2–3 years none of the patients exhibited a relapse. It is proposed that, in general, GABA-ergic anticonvulsants possess antimanic properties and that the specific antimanic effect of lithium is due to a GABA-ergic mode of action. The possible role of GABA-systems in affective disorders and in organic types of psychoses (e.g., porphyria-psychosis, delirium tremens) is discussed on the basis of pharmacopsychiatric considerations.
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  • 5
    ISSN: 1433-8491
    Keywords: Suicide ; Attempted suicide ; Suicidal act ; Parasuicidal act ; Suicide prevention services ; Suicid ; Suicidversuch ; Suicidale Handlung ; Parasuicidale Handlung ; Selbstmordverhütungsinstitutionen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An 150 Patienten mit Tablettenselbstmordversuch warden soziale und psychiatrische Daten analysiert. Die sozialen Daten werden in Beziehung gesetzt zu einer Vergleichsgruppe von Suicidenten. Bei den psychiatrischen Daten werden insbesondere Informationen über das Selbstmordverhalten herausgearbeitet. Der letzte Teil der Untersuchung beschäftigt sich mit der Bekanntheit und der Inanspruchnahme von Selbstmordverhütungsinstitutionen.
    Notes: Summary Social and psychiatric data on patients who attempted suicide are analysed and compared with social data on a control group of persons who succeeded in committing suicide. Among the psychiatric data, information about presuicidal and suicidal behavior is elaborated. The last part of the analysis describes how many people know about and use suicide prevention services.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 249 (1999), S. 144-149 
    ISSN: 1433-8491
    Keywords: Key words Depression ; Bipolar disorder ; Lithium ; Prophylaxis ; Efficacy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract It has been reported recently that the prophylactic efficacy of lithium is a transient phenomenon in many patients. Other studies suggest sustained efficacy against affective recurrences for many years. As this issue is of major therapeutic relevance, published literature considering changes in lithium efficacy over time has been reviewed. The present review includes a critical evaluation of the data and the methodology which yielded these controversial results. Considering the published data discussed in this review, the balance of evidence does not indicate a general loss of lithium efficacy in the prophylaxis of major affective disorders. A supposed persistence of the prophylactic effects in general does not, however, exclude the reappearance of affective recurrences after years of successful treatment in individual cases. Possible reasons for this phenomenon are discussed.
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  • 7
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Psychopharmakologie ; Suizid ; Schizophrenie ; Risikofaktoren ; Psychopathologie ; Keywords Psychopharmacology ; Suicide ; Schizophrenia ; Risk facotrs ; Psychopathology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract For all 5.352 patients treated for schizophrenia at the Psychiatric Hospital of the University of Munich in 1981 and 1992, detailed routine and data processing-assisted documentations were made of the psychopharmacological therapies. Nineteen of the patients committed suicide while undergoing inpatient treatment; the control group consisted of all other patients (n=5.333). More than 77 sociodemographic and anamnestic variables as well as 195 items from the admission summaries were taken into account while comparing the groups. Furthermore, the pharmacological data were classified according to drug groups and comparison was based on the mean frequency of prescription of each group. We analyzed the mean number of prescriptions for neuroleptics, tranquilizers, and antidepressants, which were further differentiated into sedating and nonsedating types. For frequently administered drugs, mean daily doses were also compared. Bivariate analysis of the data suggests that the suicide cases presented depressive signs, symptoms, and tendencies already present on admission more frequently than with controls; the same applies to previously attempted suicides. Discriminating analysis showed that the variables “feeling of loss of feelings,“ thought insertion,”“visible depression,”“free-floating anxiety,”“suicidal tendencies,” and “previously attempted suicide” have the greatest predictive value with respect to suicide, in descending order. No differences in psychopharmacological treatment between suicides and controls were found, apart from a significantly higher percentage of antidepressive treatments and a higher mean number of antidepressant prescriptions for the suicides.
    Notes: Zusammenfassung Bei allen 5.352 im Zeitraum 1981–1992 in der Psychiatrischen Klinik der Universität München stationär aufgenommenen schizophrenen Patienten wurde systematisch sowohl eine Routinedokumentation mit dem AMDP-System als auch eine computergestützte Dokumentation der pharmakologischen Behandlung durchgeführt. 19 dieser Patienten suizidierten sich während des stationären Aufenthaltes, wobei die Kontrollgruppe aus allen übrigen Patienten gebildet wurde (n=5.333). In den Gruppenvergleich gingen alle soziodemographischen und krankheitsanamnestischen Variablen sowie alle Items des AMDP-Aufnahmebefundes ein. Ferner wurden die pharmakologischen Daten nach Medikamentengruppen zusammengefasst und hinsichtlich der Verordnungshäufigkeiten der jeweiligen Pharmakagruppen verglichen. Die bivariate Auswertung zeigte neben häufigeren Suizidversuchen in der Vorgeschichte ein bei den säteren Suizidenten bereits bei Aufnahme häufiger vorliegendes depressiv-suizidales Syndrom, wobei diskriminanzanalytisch in absteigender Reihenfolge die Variablen “Gefühl der Gefühllosigkeit”, “Gedankeneingebung”, “beobachtete Depression”, “frei flottierende Angst”, “Suizidalität” und “Suizidversuch in der Vorgeschichte” die größte prädiktive Kraft in Richtung Suizid entfalteten. Mit Ausnahme einer signifikanten Erhöhung sowohl des prozentualen Anteils der antidepressiv behandelten Patienten als auch der mittleren Anzahl der Antidepressivaverordnungen in der Suizidgruppe fanden sich keine Anhaltspunkte für eine zwischen den beiden Gruppen wesentlich differierende psychopharmakologische Behandlung.
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