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Query: UMLS:C0036341 (schizophrenia)
 60,220 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The indices of acid-alkaline blood balance was studied in the dynamics of dosed hungering in 29 patients with sluggish schizophrenia and 16 patients with residual signs oforganic lesions of the CNS. There were differences in the pH index, standard and buffer bicarbonates alkaline deficiency which indicated to different degrees of acidosis in this group of patients. Significant differences in the acid-alkaline indices during hunger were seen in the different groups of patients depending upon the existence or absence of hypothalamic disorders (without consideration of their nosological affinity). The existence of hypothalamic disorders requires a more careful consideration when prescribing hunger therapy (the first session should not exceed 10-14 days).
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PMID:[Acid-base balance during dosed fasting of schizophrenic patients with residual manifestations of organic lesions of the central nervous system]. 2 50

EEG was used to study stable dominant states in 12 patients with sluggish forms of schizophrenia and 11 alcoholics. The control group consisted of 15 normals. The patients demonstrated the following traits : deviations in the EEG readings, reflecting the interaction of different cortical zones; a complex of signs indicative of changes in the development of a generalized, nonspecific component of the activation reaction compared to data of the control group; a certain rigidity in the dominant-subdominant relationships. In reduction of the pathological symptomatology and under the impact of unloading, dietic therapy (hunger) there were positive changes in the parameters characterizing the reaction of activators as well as differences in the EEG-correlations of 2 selected types of dominant states.
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PMID:[Reflection of stable dominant states in the EEG of schizophrenic and alcoholic patients]. 743 62

In the Dutch Hunger Winter at the end of World War II a combination of circumstances created the conditions of a natural experiment. Unlike other famines, the Dutch famine struck at a precisely circumscribed time and place, and in a society able to document the timing and severity of the nutritional deprivation as well as the effects on fertility and health. Because the Dutch maintained comprehensive military and health records, it was possible to compare the incidence of neurodevelopmental disorders in adulthood for birth cohorts exposed versus those unexposed to prenatal famine. We have conducted several studies guided by the hypothesis that prenatal micronutrient deficiencies can cause neurodevelopmental schizophrenia or related personality disorders. In this paper we shall summarize our previous work and combine the outcome data of the different studies. Early prenatal famine was found to be specifically and robustly associated with each of three conditions: (1) congenital anomalies of the central nervous system, (2) schizophrenia, and (3) schizophrenia spectrum personality disorders. We found that the greatest increase in the risk of schizophrenia spectrum disorder- schizophrenia plus spectrum personality disorder- occurred among males born in the famine cities in December 1945 (relative risk = 2.7; 95% confidence interval = 1.5-5.1). Persons born in December 1945 were generally conceived at the absolute peak of the famine (March-April 1945). In the hope that the associations we have found may offer clues to the aetiology of schizophrenia, we are currently tracing and examining the cases of schizophrenia after prenatal exposure to famine.
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PMID:The Dutch famine and schizophrenia spectrum disorders. 970 24

Schizophrenia, autism and depression do not inherit by Mendel's law, and the search for a genetic basis seems unsuccessful. Schizophrenia and autism relate to low birth weight and pregnancy complications, which are associated with developmental adaptations by "programming". Epigenetics might constitute the basis of programming and depend on folate status and one-carbon metabolism in general. Early folate status of patients with schizophrenia might be compromised as suggested by (i) coinciding incidences of schizophrenia and neural tube defects (NTDs) in the Dutch hunger winter, (ii) coinciding seasonal fluctuations in birth of patients with schizophrenia and NTDs, (iii) higher schizophrenia incidence in immigrants and (iv) higher incidence in methylene tetrahydrofolate reductase 677C-->T homozygotes. Recent studies in schizophrenia and autism point at epigenetic silencing of critical genes or chromosomal loci. The long-chain polyunsaturated fatty acids (LCPUFA), arachidonic acid (AA, from meat) and docosahexaenoic acid (fish) are components of brain phospholipids and modulators of signal transduction and gene expression. Patients with schizophrenia and, possibly, autism exhibit abnormal phospholipid metabolism that might cause local AA depletion and impaired eicosanoid-mediated signal transduction. National fish intakes relate inversely with major and postpartum depressions. Five out of six randomized controlled trials with eicosapentaenoic acid (fish) have shown positive effects in schizophrenia, and 4 of 6 were favorable in depression and bipolar disorders. We conclude that folate and LCPUFA might be important in both the etiology and severity of at least some psychiatric diseases.
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PMID:Folate and long-chain polyunsaturated fatty acids in psychiatric disease. 1665 Jul 50

Frequent readmissions of people with schizophrenia pose considerable pressure on the psychiatric service provision of Amanuel Psychiatric Hospital. The purpose of the study was to ascertain factors mainly contributing to the rate of readmissions of people with schizophrenia. Descriptive survey methods and qualitative focus group interviews were employed to conduct the study. Random sampling techniques were used to select 43 respondents of people with schizophrenia from 231 people with schizophrenia who were readmitted for two or more times in the last two years and who gained access during the time of the study. Structured interviews were used for respondents of people with schizophrenia. Fourteen (N=14) family members/caregivers were selected using purposive sampling methods for focus group discussions. Quantitative data was analyzed using the SPSS Version 11.00 program and the qualitative data was analyzed by generating themes and categories. The results suggest that alcohol and khat abuse were contributing factors for the rate of readmissions of people with schizophrenia into the Amanuel Psychiatric Hospital. It was found that communities contribute to the problems of substance abuse by providing and/or selling it to those mentally ill people. The study also revealed that patients use alcohol and khat in order to tolerate the severe side effects of the anti-psychotic drugs, to suppress hunger due to shortage of food and to avoid drowsiness. Raising community awareness, psycho-education, strengthening the capacities of caretakers and laws to prevent substance abuse, as well as campaigning to prevent people from abusing mentally ill sufferers, should be established.
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PMID:Substance abuse and the risk of readmission of people with schizophrenia at Amanuel Psychiatric Hospital, Ethiopia. 1770 25

Converging evidence suggests that a neurodevelopmental disruption plays a role in the vulnerability to schizophrenia. The authors review evidence supporting in utero exposure to nutritional deficiency as a determinant of schizophrenia. We first describe studies demonstrating that early gestational exposure to the Dutch Hunger Winter of 1944--1945 and to a severe famine in China are each associated with an increased risk of schizophrenia in offspring. The plausibility of several candidate micronutrients as potential risk factors for schizophrenia and the biological mechanisms that may underlie these associations are then reviewed. These nutrients include folate, essential fatty acids, retinoids, vitamin D, and iron. Following this discussion, we describe the methodology and results of an epidemiologic study based on a large birth cohort that has tested the association between prenatal homocysteine, an indicator of serum folate, and schizophrenia risk. The study capitalized on the use of archived prenatal serum specimens that make it possible to obtain direct, prospective biomarkers of prenatal insults, including levels of various nutrients during pregnancy. Finally, we discuss several strategies for subjecting the prenatal nutritional hypothesis of schizophrenia to further testing. These approaches include direct assessment of additional prenatal nutritional biomarkers in relation to schizophrenia in large birth cohorts, studies of epigenetic effects of prenatal starvation, association studies of genes relevant to folate and other micronutrient deficiencies, and animal models. Given the relatively high prevalence of nutritional deficiencies during pregnancy, this work has the potential to offer substantial benefits for the prevention of schizophrenia in the population.
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PMID:Prenatal nutritional deficiency and risk of adult schizophrenia. 1868 77

The aim of the study was to assess the effects of chronic olanzapine (Ola) administration on feeding behavior. Although atypical antipsychotics (AAPs) have greatly improved the management of schizophrenia and extrapyramidal symptoms, substantial bodies of literature point out that most of these agents are highly related to a major risk of metabolic drawbacks, leading to dyslipidemia and obesity. Among these compounds, Ola is one of the more weight gain-inducing AAPs. In the present study, we analyzed the Behavioral Satiety Sequence (BSS) in female mice given a palatable diet (wet mash) and chronically administered Ola (0.75, 1.5, 3 mg/kg per os) for 36 days. The results showed that administration of the highest dose of Ola postponed the onset of satiation, as suggested by the rightward shift of the BSS. This effect was confirmed by an increase in the actual food intake by the Ola (3 mg/kg) mice. These results suggest that one of the possible mechanisms involved in AAPinduced weight gain is alteration of the hunger-satiety regulation in female mice. These findings are consistent with the hypothesis that enhanced food intake and diminished central sensitivity to satiation signaling may cooperate in promoting weight gain and metabolic dysregulation in rodents and patients taking antipsychotic medications.
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PMID:Chronic administration of olanzapine affects Behavioral Satiety Sequence and feeding behavior in female mice. 1901 65

Using data from large scale, nationally representative sample surveys, we tested the hypothesis that prenatal exposure to famine increases schizophrenia risk at adulthood by studying the Great Leap Forward Famine in China (1959-1961). Our results show that, in the urban population, being conceived and born during the famine increased the risk of developing schizophrenia at early adulthood as compared to both the pre-famine and post-famine cohorts. In the rural population, however, the post-famine cohort had the highest risk of developing schizophrenia, and there was virtually no difference in schizophrenia risk between the pre-famine and the famine cohort. This finding contrasts sharply with previous studies on the Dutch Hunger Winter as well as with smaller scale local studies in China based on hospital records. We offer an explanation for the urban-rural difference in the schizophrenia-famine relationship based on population selection by differential excess mortality and provide supportive evidence through province- and cohort-level ecological analysis.
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PMID:Famine, death, and madness: schizophrenia in early adulthood after prenatal exposure to the Chinese Great Leap Forward Famine. 1923 55

Over the last 30 years, several questionnaires have been developed and validated in order to assess many aspects of the motivation to eat that might be susceptible to impair adequate food intake and body weight control. A few of such questionnaires are described here, in particular, the "Three Factor Eating Questionnaire" also called the "Eating Inventory", and the "Dutch Eating Behavior Questionnaire". Critical aspects of the motivation to eat assessed by these tools are presented, such as dietary restraint, disinhibition, hunger, vulnerability to eat in response to external cues or emotional states, etc. These questionnaires were developed for use in the general population with the aim to identify critical aspects of the motivation to eat that might predispose to weight gain. They have been widely used in many countries and have allowed an improved understanding of the individual characteristics that predispose to body weight gain or resistance to weight loss. Originally, poor body weight control was attributed to a high level of dietary "restraint", or in other words, the tendency to deliberately restrict one's food intake for body weight control purposes. Such dietary restraint was suspected to lead to a number of physical and psychological difficulties, among which poor self-esteem and a paradoxical tendency to gain weight, resulting from the incapacity to maintain strict restraint over time. More recent studies have established that a motivational trait called "Disinhibition" is a strong predictor of body weight gain over time and of poor outcome of dieting. "Disinhibition" corresponds to a tendency to lose control over one's eating behavior and ingest excessively large quantities of food substances, in response to a variety of cues and circumstances. In addition to its untoward effect on weight, disinhibition also predicts various risk factors and pathologies, such as hypertension and diabetes. Other potentially critical dimensions for adequate body weight control are "emotional eating" and "externality", which represent an individual's vulnerability to eat in response to emotional states or external cues, respectively. These questionnaires have been translated into French and validated for the French population. Average data are available for normal weight and obese French men and women. A gender difference is often reported: women, and even young girls, tend to have higher scores than males for most dimensions. These questionnaires have been extensively used in populations without psychiatric disorders, with the only exception of diagnosed eating disorders such as anorexia and bulimia nervosa. The questionnaires have not been used until now in populations with other types of psychiatric disorders, such as schizophrenia or bipolar disease. Their relevance for such populations is now an important question, since last generation pharmaceutical treatments of such psychiatric disorders seem to adversely affect body weight control. It then becomes critical to know whether the psychological dimensions assessed by such questionnaires reflect the action of pharmacological agents that induce weight gain. A research project is now in progress at Sainte-Anne Hospital to investigate many dimensions of the motivation to eat, as assessed by the questionnaires, in psychiatric patients receiving various types of antipsychotic agents. The results of this original study might provide hints about the mechanisms that lead to body weight gain in patients receiving certain types of antipsychotic pharmacological agents and potentially help in preventing or reversing the weight gain associated with such treatments.
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PMID:[Assessing various aspects of the motivation to eat that can affect food intake and body weight control]. 1939 89

Atypical antipsychotics such as olanzapine and clozapine are effective at treating the multiple domains of schizophrenia, with a low risk of extra-pyramidal side-effects. However a major downfall to their use is metabolic side-effects particularly weight gain/obesity, which occurs by unknown mechanisms. The present paper explores the potential candidature of histaminergic neurotransmission in the mechanisms of atypical antipsychotic-induced weight gain, with a focus on the histaminergic H1 and H3 receptors. Olanzapine and clozapine have a high affinity for the H1 receptor, and meta-analyses show a strong correlation between risk of weight gain and H1 receptor affinity. In addition, olanzapine treatment decreases H1 receptor binding and mRNA expression in the rat hypothalamus. Furthermore, a complex role is emerging for the histamine H3 receptor in the control of hunger. The H3 receptor is a pre-synaptic autoreceptor that inhibits the synthesis and release of histamine, and a heteroreceptor that inhibits other neurotransmitters such as serotonin (5-HT), noradrenaline (NA) and acetylcholine (ACh), which are also implicated in the regulation of food intake. Thus, the H3 receptor is in a prime position to regulate food intake, both through its control of histamine and its influence on other feeding pathways. We proposed that a mechanism for atypical antipsychotic-induced weight gain may be partly through the H3 receptor, as a drug-induced decrease in H1 receptor activity may decrease histamine tone through the H3 autoreceptors, compounding the weight gain problem. In addition, atypical antipsychotics may affect food intake by influencing 5-HT, NA and ACh release via interactions with the H3 heteroreceptor.
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PMID:The role of histaminergic H1 and H3 receptors in food intake: a mechanism for atypical antipsychotic-induced weight gain? 1992 55


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