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  • Adrenocorticotrophic hormone  (1)
  • Aging  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 65 (1987), S. 213-217 
    ISSN: 1432-1440
    Keywords: Naloxone ; Circulatory shock ; Adrenocorticotrophic hormone ; β-endorphin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of naloxone (4.4–5.9 mg i.v.) was evaluated in 10 patients with circulatory shock (sepsis,n=7; intoxication,n=1; cardiogenic shock,n=2) not responding to full conventional therapy. In addition, we measured plasma ACTH and immunoreactive β-endorphin before and 60 min after administration of naloxone and compared the results with hormone concentrations in 10 intensive care patients without shock. Only in two patient with septic shock a transient increase (duration 15 min and 60 min, respectively) of systolic blood pressure was observed, while naloxone was ineffective in the remaining eight patients. No adverse effects of naloxone were found. Plasma ACTH and immunoreactive β-endorphin concentrations in patients with shock were not different from those in controls (ACTH, 79±28 vs 120±60 pg/ml; immunoreactive β-endorphin, 952±262 vs 1,070±378 pg/ml). Our findings suggest that naloxone in a single dose of 4.4–5.9 mg i.v. does not improve the management of circulatory shock unresponsive to conventional treatment. β-endorphin seems to play no major role in the hypotension of shock.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2072
    Keywords: Aging ; Ipsapirone ; Serotonin (5-HT) ; 5-HT1A receptors ; Temperature ; ACTH ; Cortisol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of a challenge dose of the 5-HT1A agonist, ipsapirone (0.3 mg per kg body weight), or placebo on body temperature and on adrenocorticotrophic hormone (ACTH) and cortisol release, were examined in 30 normal subjects (14 males, 19–74 years and 16 females, 22–69 years) using a randomized, double blind design. Irrespective of age or gender, ipsapirone induced a significant reduction in body temperature relative to placebo and a significant increase in ACTH and cortisol release. Maximal temperature reduction by ipsapirone was significantly blunted in older subjects and was inversely related to age. There was no gender difference in the hypothermic response to ipsapirone. ACTH and cortisol responses showed an opposite impact of aging in males and females. Whereas both responses diminished with age in male subjects, they increased with age in females. The cortisol response of older females was significantly larger than that of all the other subjects. Adverse effects of ipsapirone were also more marked in elderly females and were correlated with ACTH and cortisol responses. These findings should be taken into consideration in the use of ipsapirone and other 5-HT1A agonists as challenge procedures for studying central serotonergic function in depression and other disorders. Careful matching of control and experimental subjects is indicated so as to avoid spurious results which reflect the effects of age and gender rather than the pathophysiology of the disorders being investigated.
    Type of Medium: Electronic Resource
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