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  • 1995-1999  (3)
  • ATPase  (2)
  • Befindlichkeit  (1)
  • Aristolochiaceae
  • Protein degradation
  • 1
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Droperidol ; Nebenwirkungen ; Angst ; Anspannung ; Befindlichkeit ; Postoperative Übelkeit und Erbrechen ; Key words Droperidol (side-effects) ; Anxiety ; Tension ; Overall mood ; Postoperative nausea and vomiting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background: Droperidol even in low doses such as 0,5 mg to 1,25 mg can increase postoperative anxiety and state of tension. The aim of this study was to determine whether these side effects occur frequently following low-dose droperidol and to see whether these are dose related. Methods: 184 female in- and outpatients ASA grade 1 and 2 undergoing gynaecological laparoscopy were recruited to this prospective, double-blind study. General anaesthesia was standardized (induction with thiopentone, fentanyl 2 µg/kg and vecuronium 0,1 mg/kg, tracheal intubation, maintainance with enflurane in N2O/O2). Patients were randomly allocated to receive saline (n=45), 0,625 mg (n=46), 1,25 mg (n=47) or 2,5 mg (n=46) droperidol i.v. 10 minutes before the end of surgery. 1, 3, 6, and 24 hours postoperatively, the patients’ anxiety, state of tension and overall mood was evaluated using two psychological questionnaires which had been tested for the perioperative period (Erlanger anxiety and tension-scale / BSKE-EWL-test). Sedation was evaluated by the staff of the recovery room. In addition, postoperative nausea and vomiting (PONV) was assessed using a 100 mm visual analogue scale and by counting the episodes of retching or vomiting. PONV was then rated over the whole observation period as none, mild, moderate or severe using a fixed scoring algorithm. Statistical analysis was performed using the ANOVA and the chi2-test. Results: The patients did not differ with regard to biometric data, duration of surgery and anaesthesia. The postoperative scores for anxiety, state of tension and overall mood were not different between the groups at any observation time (Fig. 1: anxiety and tension: P=0,5687; figure 2: overall mood: P=0,0647). Quality of sleep in the first night after surgery was the same in all groups (Table 2 and 3). Sedation was not significantly different (Table 4; P=0,0704). Furthermore, duration of stay in the recovery room did not differ (P=0,4353). On the other hand, three patients from the 2,5 mg droperidol group had to stay unexpectedly on the ward overnight, because they had been too much sedated to be discharged at home. This was not the case with any patient from the other groups. Compared to placebo, PONV over the whole 24 h observation period was significantly reduced by droperidol (Fig. 3; P=0,0338): completely free from PONV: placebo: 41,3%, 0,625 mg droperidol: 67,4%, 1,25 mg droperidol: 53,2%, 2,5 mg droperidol: 71,7%. Also the severity of PONV was reduced. Conclusion: In gynaecological laparoscopy under general anaesthesia with tracheal intubation, we recommend droperidol 0,625 mg in the prevention of PONV, as it reduces PONV as well as 2,5 mg with no severe sedation in this dosage. Psychological side effects did not occur more frequently after droperidol compared to placebo in any of the investigated dosages.
    Notes: Zusammenfassung In vorliegender Studie wurden das Ausmaß postoperativer Angst, innerer Anspannung und allgemeiner Befindlichkeitsstörungen nach intraoperativ verabreichtem Droperidol und eine mögliche Dosisabhängigkeit dieser Nebenwirkungen untersucht. Zu diesem Zweck wurden erstmals zwei evaluierte Selbstbeurteilungsfragebögen eingesetzt. 184 ASA I und II Patientinnen, die sich einer gynäkologischen Laparoskopie in standardisierter Intubationsnarkose unterzogen, wurden in diese randomisierte, doppelblinde und plazebokontrollierte Untersuchung aufgenommen. Zehn Minuten vor Narkoseende erhielten die Patientinnen i.v. Kochsalz, 0,625 mg, 1,25 mg oder 2,5 mg Droperidol. Angst und allgemeines Befinden sowie Übelkeit und Erbrechen in der postoperativen Phase (PONV) wurden 1, 3, 6 und 24 h postoperativ registriert. Die Werte für Angst und allgemeines Befinden zeigten zu keinem Untersuchungszeitpunkt Gruppenunterschiede. Die Schlafqualität in der ersten postoperativen Nacht war in allen Gruppen gleich. Verglichen mit Plazebo wurde PONV durch Droperidol in jeder Dosierung gesenkt (p=0,0338): komplett frei von PONV: Plazebo: 41,3%, Droperidol 0,625 mg: 67,4%, 1,25 mg: 53,2%, 2,5 mg: 71,7%. Bei gynäkologischen Laparoskopien in Intubationsnarkose empfehlen wir zur Prophylaxe von PONV 0,625 mg Droperidol, da es ebensogut antiemetisch wirksam ist wie 2,5 mg. Psychische Nebenwirkungen wie Angst oder andere Befindlichkeitsstörungen treten in keiner der untersuchten Droperidoldosierungen vermehrt auf.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-4978
    Keywords: activator complex ; ATPase ; 26S proteasome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Each 19S regulator of the 26S proteasome contains six ATPase subunits as well as many (〉14) non-ATPase protein subunits. The ATPase subunits have been detected in other complexes which may regulate transcription and possibly other cellular processes. The S10b (yeast SUG2 or human p42) and the S6′ (TBP1) ATPases have been found in an activator complex (modulator) prepared from bovine red cells. We have identified and partially characterised a similar activator from different human tissues (from soluble extracts of human brain, placenta and human embryonic kidney cells) and an insect: an activator is present in soluble extracts of abdominal intersegmental muscle from Manduca sexta. Activation is ATP and concentration dependent. There is no stimulation of human red cell-derived 20S proteasome by the Manduca activator ruling out 11S regulator in the preparations. Additionally, cross-species activation occurs: the Manduca activator increases the activity of rat skeletal muscle 26S proteasomes and the human placental activator similarly increases the activity of 26S proteasomes prepared from muscles from Manduca sexta. Finally, there is no evidence for other ATPases in the activator complex.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-4978
    Keywords: ATPase ; 26S proteasome ; programmed cell death ; regulators
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract There is extensive reprogramming of the ATPase regulators of the 26S proteasome before the programmed elimination of the abdominal intersegmental muscles (ISM) after eclosion in Manduca sexta [1]. This extensive ATPase reprogramming only occurs in ISM which are destined to die and not in flight muscle (FM). The MS73 ATPase also increases in the proleg retractor muscles which die at a developmentally different stage to ISM. The non-ATPase regulator S5a shows a similar increase to the ATPase regulators. We have cloned the Manduca SUG2 ATPase and shown that this ATPase is a component of the 26S proteasome. This ATPase shows a similar increase in concentration to the other ATPases in 26S proteasomes before muscle death. The SUG2 ATPase is also associated with other smaller complexes besides the 26S proteasome which act as activators of the 26S proteasome. Finally, in a yeast two-hybrid genetic screen we have identified a protein in human brain which interacts with the MS73 ATPase (and human S6). The interacting protein contains 6 ankyrin repeats and is co-immunoprecipitated with anti-MS73 antiserum after in vitro transcription/translation. The ankyrin repeat protein may interact with the MS73 ATPase as part of the substrate recognition process by the 26S proteasome. Many proteins degraded by the 26S proteasome contain ankyrin repeats, e.g. IkB and some cyclins: binding through ankyrin repeats to an ATPase regulator may complement protein ubiquitination and S5a binding as recognition signals by the 26S proteasome.
    Type of Medium: Electronic Resource
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