Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0036341 (schizophrenia)
 60,220 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Hypersensitivity to sensory stimulation is a prominent characteristic of both schizophrenia and mania. Neurophysiological recordings suggest a common deficit in a central neuronal sensory gating mechanism which regulates sensitivity to repeated auditory stimuli. Dopamine and norepinephrine are hypothesized to have major roles in these illnesses, but their role in aberrant sensory processing has not yet been proved. Presumptive evidence for effects of catecholamines on sensory processing comes from psychophysiological studies of normal subjects challenged with stimulants who show decreased sensory gating, and studies of psychotic patients treated with neuroleptics who show improved function. Studies of similar phenomena in animals show comparable effects of catecholamines on sensory processing, both behaviorally and at the single neuron level. In this study, gating of auditory evoked potentials (EPs) during treatment of both illnesses was compared with plasma dopamine and norepinephrine metabolites. Comparisons of medicated and unmedicated states showed that schizophrenic patients have a fixed deficit in sensory gating, which is a familial trait, unchanged by medication. During acute illness, they have an additional transient hypersensitivity to stimuli, manifested as smaller EPs, which seems to be mediated by dopamine. Manic patients have only the deficit in sensory gating, which is transient and seems to be mediated by norepinephrine. Thus, similar neurophysiological deficits in the two psychoses are associated with different biochemical abnormalities, which may explain similarities in acute symptoms and differences in other aspects of the illnesses, such as their response to treatment.
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PMID:Sensory physiology and catecholamines in schizophrenia and mania. 233 60

The paper introduces a catalog of symptoms to promote in the field of endogenous psychoses differentiated diagnosis, at the same time constituting a prognosis. Symptoms should be more minutely differentiated than is customary in psychiatric questionnaires. Manic-depressive disorders and purely phasal psychoses are distinguished solely in the clinical evaluation. Thus benign cycloid psychoses can be distinguished from malignant unsystematic schizophrenia.
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PMID:[Differential diagnosis of endogenous psychoses in relation to a symptom catalog]. 235 47

In a prospective study of 80 new female patients with acute psychiatric disorders (40 each with schizophrenia and major affective disorder), elevated (P less than 0.001) serum concentrations of IgG and IgA were found in comparison to healthy control groups matched for age and sex. In schizophrenic patients the mean levels of IgG (1682.76 mg/dl) and IgA (321.12 mg/dl) were found to be significantly more as compared to those in the control group (IgG-1213.18 mg/dl and IgA - 210.14 mg/dl). Patients with paranoid schizophrenia had significantly high mean serum levels of IgG (1896.86 mg/dl) and IgA (376.16 mg/dl) in comparison to other subtypes of schizophrenia (i.e., catatonic, disorganized and undifferentiated). Mean serum concentrations of IgG and IgA in major affective disorder - mania (IgG 1526.36 mg/dl and IgA 382.16 mg/dl) and major depressive episode (IgG 2008.12 mg/dl and IgA 536.72 mg/dl) were found to be significantly higher as compared to those in the control group (IgG-920.21 mg/dl and IgA - 232.12 mg/dl).
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PMID:Immunoglobulin profile in acute psychiatric disorders. 237 88

Performance on a happy-sad chimeric face test was used to examine the role of right hemisphere activation in positive and negative affect, both normal and abnormal, as well as in schizophrenia. This test is known to elicit a left-sided perceptual bias in right-handed normal subjects. Happy and sad mood in normals did not influence the perceptual bias. Depression and mania were associated with reduced and increased biases respectively, while schizophrenics showed no bias to either side. Possible explanations are right hemisphere hyperfunction in mania, moderate relative hypofunction in depression, and severe relative hypofunction in schizophrenia. The marked difference between mania and schizophrenia supports distinct pathophysiologies underlying the two conditions.
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PMID:Affect, affective disorder and schizophrenia. A neuropsychological investigation of right hemisphere function. 238 58

Lifetime prevalence rates were calculated for comorbid psychiatric disorders in 119 patients who were referred from primary care physicians for unexplained somatic complaints and who met DSM III-R criteria for somatization disorder. Comparisons were made with general population norms from the ECA study. Prevalence of nine comorbid conditions was significantly higher than in the general populations. The most prevalent comorbid diagnoses were major depression (54.6%), generalized anxiety disorder (33.6%), and phobic disorders (31.1%). The least common comorbid disorders were mania (4.2%) and drug abuse (4.9%); drug abuse prevalence rates did not significantly exceed general population estimates. Risk ratios were highest for panic disorder (16.25), major depression (9.41), schizophrenia (7.77), and obsessive-compulsive disorder (7.04).
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PMID:Psychiatric comorbidity in primary care somatization disorder. 239 95

Bromocriptine, an ergot alkaloid derivative that possesses both dopamine agonist and antagonist activity, has been studied in a broad spectrum of psychiatric illnesses. The literature consists primarily of case reports and small trials limited by methodological shortcomings. The authors critically review these reports, focusing on efficacy, mechanistic issues, dosing, side effects, predictors of response, monitoring parameters, and practical guidelines. Preliminary data suggest bromocriptine may have promise in the treatment of neuroleptic malignant syndrome, cocaine withdrawal, and depression. At present, the agent appears less efficacious in the treatment of tardive dyskinesia, mania, and schizophrenia; however, doses in these trials may have been excessive, producing primarily postsynaptic agonist effects. More extensive clinical trials are required to clearly define the role of bromocriptine in psychiatry.
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PMID:Psychiatric applications of bromocriptine therapy. 198 19

B-HT 920 (6-allyl-2-amino-5,6,7,8-tetrahydro-4H-thiazolo[4,5-d]azepine), a candidate for selective dopamine (DA) autoreceptor agonist activity, was tested for its interactions with biochemical parameters of brain dopaminergic, noradrenergic and serotoninergic systems as measured in ventriculocisternal perfusates of chloralose-anaesthetized cats. DA, 3,4-dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA), noradrenaline (NA) and 5-hydroxyindolic acid (5-HIAA) were measured in samples of 30 min collection periods by high-pressure liquid chromatography with electrochemical detection. B-HT 920, in the dose range of 0.03-1 mg/kg i.v., promptly inhibited the efflux of DA and DOPAC in a dose-dependent manner. The 1 mg/kg dose of B-HT 920 reduced the DA levels below 25% of control levels for the whole length of the experiments. The HVA levels were reduced less and in a protracted manner. Only the highest dose of B-HT 920 tested (1 mg/kg) had a significant effect on the level of NA (marked, prompt reduction) and 5-HIAA (delayed, moderate reduction), reflecting its well known alpha 2-adrenoceptor agonist property. The effects of B-HT 920 on the dopaminergic indices were DA receptor-mediated as they were reversed by a low dose (0.05 mg/kg i.v.) of haloperidol. In contrast, the alpha 2-adrenoceptor blocking drug, idazoxan, 4 mg/kg i.v., while it reversed the NA and 5-HIAA reductions did not modify the effect of B-HT 920 on DA, DOPAC and HVA. Thus B-HT 920, in the dose range between 0.03-0.1 mg/kg, selectively affected brain dopaminergic parameters. Our experiments demonstrated that B-HT 920 causes an effective, long lasting and selective suppression of extracellular brain DA levels in vivo. B-HT 920 represents a promising compound for clinical use in pathological conditions known to be ameliorated by a reduction of brain DA activity, such as Huntington's disease, mania and schizophrenia.
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PMID:The dopamine autoreceptor agonist, B-HT 920, preferentially reduces brain dopamine release in vivo: biochemical indices of brain dopamine, noradrenaline and serotonin in ventriculocisternal perfusates in the cat. 246 28

Children of mothers who satisfied the Research Diagnostic Criteria of (1) Schizophrenia, (2) Alcoholism or Drug Use Disorder, (3) Major Depressive Disorder including Mania, (4) Unspecified Functional Psychosis, and (5) Other Psychiatric Disorder and children of obstetric controls were studied with regard to subsequent mental and behavioural development and social conditions. 72 index children and 17 children from the comparison group were examined at an approximate age of six years by a child psychologist. More index children than those from the comparison group showed impaired mental and behavioural development. The children of abusing mothers in particular tended to have a worse outcome. One-half of the index children were not living with their mothers at the time of follow-up.
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PMID:Children of mentally ill mothers: social situation and psychometric testing of mental development. 247 14

China's population is increasing at a rate of 12 million/year and the population doubled from 1949 to 1982. By the end of the century there will be 1 billion 300 million people when the land resources can accommodate only 680 million inhabitants. The policy of 1 child aims only at curtailing this growth by a system of awards and penalties. Contraceptives are free and widely available. As a result there are 32 million single children, and there is concern about the future care of the elderly. Since 1949 health care has improved. The infant mortality rate decreased from 200/1000 in 1949 to 34/1000 in 1982. Average life expectancy rose from 35 to 68 years. There are 2 million hospital beds and over 4 million medical personnel. Contagious and infectious diseases were eliminated in the 1950s, however, 60 million Chinese suffer from endemic disease, especially from snail fever. 40 million women use IUDs. There are 144 medical schools with 144,000 students. 1,200,000 paramedics provide primary care in the communes. There is an acute shortage of nurses because of its lowly status. Dependents pay 50% of health care while it is free for workers. Health education campaigns are widespread (1 child only, stop smoking). The elderly are cared for by their children, but grandparents also take care of grandchildren. Retirement age is 55 or 60 depending on gender and type of work. Professional visits were made to the Beijing Traditional Chinese Medicine Hospital (gallstone treatment with herbs, heat-producing moxibustion for blood circulation), Norman Bethune Hospital, (suction and prostaglandins for abortion), Dongying Commune, Hebei Medical College (25 specialties for postgraduate students), Shandong Psychiatric Hospital in Jinan (treatment of acute psychoses, schizophrenia, or mania), the Provincial Hospital Jinan (cesarean operations are done with acupuncture anesthesia), Jinan School of Health (nursing curriculum demonstration), Shanghai First Social Welfare Home for the Elderly, and to several factories.
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PMID:Aspects of health care in China. 250 88

Admissions for mania have risen significantly in Edinburgh since 1970. Differencing was used to remove time trends; this showed that the rise was not accounted for by diagnosis change (from schizophrenia or personality disorder) or by lithium prescription. The contribution of non-specific factors such as admission policy and the experience of trainee psychiatrists deserves evaluation. If this rise continues there will be significant resource implications for the future.
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PMID:Diagnosis change, lithium use and admissions for mania in Edinburgh. 259 40


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