NEWS HIGHLIGHTSMedia Articles Related to Perphenazine
Immune System Activated In Schizophrenia
Source: Immune System / Vaccines News From Medical News Today [2009.11.19]
Researchers at the Swedish medical university Karolinska Institutet have discovered that patients with recent-onset schizophrenia have higher levels of inflammatory substances in their brains. Their findings offer hope of being able to treat schizophrenia with drugs that affect the immune system. The causes of schizophrenia are largely unknown, and this hinders the development of effective treatments.
Major Schizophrenia Study Finds Striking Similarities Across 37 Countries In Six Regions
Source: Mental Health News From Medical News Today [2009.11.16]
An international study of more than 17,000 people with schizophrenia has found striking similarities in symptoms, medication, employment and sexual problems, despite the fact that it covered a diverse range of patients and healthcare systems in 37 different countries.
World's Leading Experts In Schizophrenia To Meet At 26th Annual Pittsburgh Schizophrenia Conference Nov. 13
Source: Schizophrenia News From Medical News Today [2009.11.08]
Internationally renowned experts in schizophrenia and other psychotic disorders, researchers and clinicians, patients and their families and friends will gather in Pittsburgh to discuss the latest in research and clinical advances at the 26th Annual Pittsburgh Schizophrenia Conference to be held Friday, Nov. 13, at the Sheraton Station Square, Pittsburgh.
Schizophrenia
Source: MedicineNet Alcohol Abuse and Alcoholism Specialty [2009.10.30]
Title: Schizophrenia
Category: Diseases and Conditions
Created: 12/31/1997
Last Editorial Review: 10/30/2009
Forest Laboratories, Inc. And Gedeon Richter Announce Positive Results From A Phase IIb Study Of Cariprazine For The Treatment Of Schizophrenia
Source: Schizophrenia News From Medical News Today [2009.10.29]
Forest Laboratories, Inc. (NYSE: FRX) and Gedeon Richter Plc announced positive top-line results from a Phase IIb clinical trial of the novel, investigational antipsychotic agent cariprazine for the treatment of acute exacerbation of schizophrenia.
Published Studies Related to Perphenazine
Employment outcomes in a randomized trial of second-generation antipsychotics and perphenazine in the treatment of individuals with schizophrenia. [2008.04]
Employment has been increasingly recognized as an important goal for individuals with schizophrenia. Previous research has shown mixed results on the relationship of specific antipsychotic medications to employment outcomes, with some studies finding greater benefits for second-generation antipsychotic medications (SGAs) over first-generation antipsychotic medication (FGAs)...
CYP2D6 and DRD2 genes differentially impact pharmacodynamic sensitivity and time course of prolactin response to perphenazine. [2007.11]
OBJECTIVES: We observed that CYP2D6 contributes to pharmacodynamic tissue sensitivity to perphenazine as measured by the areas under the curve (AUCs) expressed as a ratio (prolactin-AUC0-6/perphenazine-AUC0-6) in Chinese Canadians [Pharmacogenetics and Genomics 2007; 17:339-347]. As genetic heterogeneity in drug targets can influence drug response, we sought to further evaluate the contribution of CYP2D6 to pharmacodynamic sensitivity in our previous study sample in tandem with DRD2, the primary molecular target for perphenazine... CONCLUSIONS: CYP2D6 seems to be an independent contributor to pituitary pharmacodynamic tissue sensitivity to perphenazine after accounting for DRD2 functional polymorphisms. The A1 allele of the Taq1A polymorphism was previously shown to decrease D2 receptor density in vitro and in neuroimaging studies in vivo. At a given antipsychotic dose, individuals with A1 allele might thus achieve a higher DRD2 antipsychotic occupancy, which is consistent with an increased prolactin elevation in the A1/A1 genotype in this study. These findings provide a basis for further studies on the endogenous substrates of CYP2D6 and the rational selection of candidate genes for long-term consequences of antipsychotic-induced hyperprolactinemia (e.g. susceptibility to breast and prostate cancers).
CYP2D6 genotype in relation to perphenazine concentration and pituitary pharmacodynamic tissue sensitivity in Asians: CYP2D6-serotonin-dopamine crosstalk revisited. [2007.05]
OBJECTIVES: Hyperprolactinemia is a common side effect of first-generation antipsychotics mediated by antagonism of dopaminergic neurotransmission in the pituitary. Most first-generation antipsychotics are metabolized by CYP2D6 in the liver. Further, CYP2D6 is expressed in the human brain as a 5-methoxyindolethylamine O-demethylase potentially contributing to regeneration of serotonin from 5-methoxytryptamine. As dopaminergic neurotransmission is subject to regulation by serotonin, CYP2D6 may exert a nuanced (serotonergic) influence on dopaminergic tone in the pituitary. CYP2D6*10 is an allele associated with reduced enzyme function and occurs in high frequency (about 50%) in Asians. We prospectively evaluated significance of CYP2D6 genetic variation for prolactin response to perphenazine (a model first-generation antipsychotic) in Asians... CONCLUSIONS: CYP2D6 genotype is a significant contributor to perphenazine concentration in Chinese-Canadians. Importantly, prolactin response, when normalized per unit perphenazine concentration, appears to be blunted in volunteers homozygous for CYP2D6*10. We suggest that CYP2D6 genetic variation may potentially influence pharmacodynamic tissue sensitivity in the pituitary, presumably through disposition of an endogenous substrate (e.g. 5-methoxytryptamine).
Effectiveness of olanzapine, quetiapine, and risperidone in patients with chronic schizophrenia after discontinuing perphenazine: a CATIE study. [2007.03]
CONCLUSIONS: Among this group of patients with chronic schizophrenia who had just discontinued the older antipsychotic perphenazine, quetiapine and olanzapine were more effective than risperidone, as reflected by longer time to discontinuation for any reason. In the context of other results from the CATIE study, the effectiveness and acceptability of antipsychotic drugs appears to vary considerably according to clinical circumstances.
Aripiprazole for treatment-resistant schizophrenia: results of a multicenter, randomized, double-blind, comparison study versus perphenazine. [2007.02]
CONCLUSIONS: Aripiprazole and perphenazine, at the doses used here, can improve the symptoms of schizophrenia in treatment-resistant patients who have failed to respond to olanzapine or risperidone.
Clinical Trials Related to Perphenazine
A Positron Emission Tomography (PET) Study to Assess the Degree of Dopamine-2 (D2) Receptor Occupancy in the Human Brain After Single Doses of BL-1020 or Perphenazine in Healthy Male Subjects Using [11C]Raclopride as PET Tracer [Recruiting]
A Double-Blind, Controlled Study of Aripiprazole in Co-Morbid Schizophrenia and Cocaine Dependence [Recruiting]
The purpose of this study is to gather systematic clinical data on whether aripiprazole, a
partial dopamine agonist, beneficially affects schizophrenia plus cocaine dependence
subjects. Since aripiprazole has established effects against schizophrenia, the study
focuses on whether aripiprazole concurrently reduces co-morbid cocaine dependence in
schizophrenia plus cocaine dependence sufferers compared to a standard typical antipsychotic
treatment (perphenazine). The working hypothesis states that subjects in the aripiprazole
treatment arm of the study will give fewer cocaine positive urine specimens as compared to
the perphenazine control arm.
Aripiprazole for Co-Morbid Schizophrenia and Cocaine Dependence [Recruiting]
The purpose of this study is to gather systematic clinical data on whether aripiprazole, a
partial dopamine agonist, beneficially affects schizophrenia plus cocaine dependence
(SCHZ+CD) subjects. Since aripiprazole has established effects against SCHZ, the study
focuses on whether aripiprazole concurrently ameliorates co-morbid CD in SCHZ+CD sufferers
compared to a standard typical antipsychotic treatment (perphenazine). The working
hypothesis states that subjects in the aripiprazole treatment arm of the study will yield
fewer cocaine positive urine specimens as compared to the perphenazine control arm.
Serotonergic Pharmacotherapy for Agitation of Dementia [Completed]
This study is a randomized, double-blind, placebo-controlled, fixed dose study currently
being conducted on two geropsychiatric units at Western Psychiatric Institute and Clinic. It
seeks to evaluate the short-term safety and efficacy of citalopram and perphenazine in the
treatment of 112 patients suffering from behavioral disturbances associated with dementia.
Findings from this research may directly lead to improved acute pharmacotherapy for psychosis
and behavioral problems in patients diagnosed with dementia. Improved treatment of behavioral
complications with reduced side effects would reduce excess disability in patients diagnosed
with dementia, allowing them to be maintained in the community for greater periods of time.
CATIE- Schizophrenia Trial [Completed]
The CATIE Schizophrenia Trial is part of the Clinical Antipsychotic Trials of Intervention
Effectiveness (CATIE) Project. The schizophrenia trial is being conducted to determine the
long-term effects and usefulness of antipsychotic medications in persons with schizophrenia.
It is designed for people with schizophrenia who may benefit from a medication change. The
study involves the newer atypical antipsychotics (olanzapine, quetiapine, risperidone,
clozapine, and ziprasidone)and the typical antipsychotics (perphenazine and fluphenazine
decanoate). All participants will receive an initial comprehensive medical and psychiatric
evaluation and will be closely followed throughout the study. For most participants the study
will last up to 18 months. Everyone in the study will be offered an educational program about
schizophrenia and family members will be encouraged to participate.
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