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Response to meta-chlorophenylpiperazine in panic disorder patients and healthy subjects: influence of reduction in intravenous dosage. 1994

M Germine, and A W Goddard, and D E Sholomskas, and S W Woods, and D S Charney, and G R Heninger
Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA.

As a further test of the hypothesis of serotonin hypersensitivity in panic disorder (PD), the serotonin agonist meta-chlorophenylpiperazine (MCPP) was administered intravenously in a dose of 0.05 mg/kg to 27 PD patients and 22 normal control subjects. This is one-half the dose used in our previous study of PD patients, where the dose may have been too high to provide evidence of hypersensitivity to the agent. Responses of anxiety and nervousness were statistically indistinguishable by analysis of variance in the two groups, replicating our previous findings. Panic attack symptom score (PASS) ratings were significantly higher in the PD group, compared with a trend toward higher PASS ratings in the 0.1 mg/kg study. Cortisol, human growth hormone, and male prolactin responses showed no significant differences in the two groups by analysis of variance. Prolactin responses were significantly blunted in the female patients. The unexpected blunted prolactin response to MCPP in female PD patients may reflect a nonspecific blunting of prolactin response to stress. The PASS data provide some evidence of serotonergic hypersensitivity in PD.

UI MeSH Term Description Entries
D007275 Injections, Intravenous Injections made into a vein for therapeutic or experimental purposes. Intravenous Injections,Injection, Intravenous,Intravenous Injection
D008297 Male Males
D010879 Piperazines Compounds that are derived from PIPERAZINE.
D010919 Placebos Any dummy medication or treatment. Although placebos originally were medicinal preparations having no specific pharmacological activity against a targeted condition, the concept has been extended to include treatments or procedures, especially those administered to control groups in clinical trials in order to provide baseline measurements for the experimental protocol. Sham Treatment
D011388 Prolactin A lactogenic hormone secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). It is a polypeptide of approximately 23 kD. Besides its major action on lactation, in some species prolactin exerts effects on reproduction, maternal behavior, fat metabolism, immunomodulation and osmoregulation. Prolactin receptors are present in the mammary gland, hypothalamus, liver, ovary, testis, and prostate. Lactogenic Hormone, Pituitary,Mammotropic Hormone, Pituitary,Mammotropin,PRL (Prolactin),Hormone, Pituitary Lactogenic,Hormone, Pituitary Mammotropic,Pituitary Lactogenic Hormone,Pituitary Mammotropic Hormone
D011569 Psychiatric Status Rating Scales Standardized procedures utilizing rating scales or interview schedules carried out by health personnel for evaluating the degree of mental illness. Factor Construct Rating Scales (FCRS),Katz Adjustment Scales,Lorr's Inpatient Multidimensional Psychiatric Rating Scale,Wittenborn Scales,Edinburgh Postnatal Depression Scale,Mini International Neuropsychiatric Interview
D011594 Psychometrics Assessment of psychological variables by the application of mathematical procedures. Psychometric
D004305 Dose-Response Relationship, Drug The relationship between the dose of an administered drug and the response of the organism to the drug. Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response
D005260 Female Females
D006339 Heart Rate The number of times the HEART VENTRICLES contract per unit of time, usually per minute. Cardiac Rate,Chronotropism, Cardiac,Heart Rate Control,Heartbeat,Pulse Rate,Cardiac Chronotropy,Cardiac Chronotropism,Cardiac Rates,Chronotropy, Cardiac,Control, Heart Rate,Heart Rates,Heartbeats,Pulse Rates,Rate Control, Heart,Rate, Cardiac,Rate, Heart,Rate, Pulse

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