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1.
Public Health Rep ; 137(2_suppl): 61S-66S, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35989589

RESUMEN

Few reports have described how university programs have controlled COVID-19 outbreaks. Emory University established a case investigation and contact tracing program in June 2020 to identify and mitigate transmission of SARS-CoV-2 in the Emory community. In February 2021, this program identified a surge in COVID-19 cases. In this case study, we present details of outbreak investigation, construction of transmission networks to assess clustering and identify groups for targeted testing, and program quality metrics demonstrating the efficiency of case investigation and contact tracing, which helped bring the surge under control. During February 10-March 5, 2021, Emory University identified 265 COVID-19 cases confirmed by nucleic acid testing in saliva or nasopharyngeal samples. Most students with COVID-19 were undergraduates (95%) and were affiliated with Greek life organizations (70%); 41% lived on campus. Network analysis identified 1 epidemiologically linked cluster of 198 people. Nearly all students diagnosed with COVID-19 (96%) were interviewed the same day as their positive test result. Of 340 close contacts, 90% were traced and 89% were tested. The median time from contact interview to first test was 2 days (interquartile range, 0-6 days); 43% received a positive test result during their quarantine. The surge was considered under control within 17 days, after which new cases were no longer epidemiologically linked. Early detection through systematic testing protocols and rapid and near-complete contact tracing, paired with isolation and quarantine measures, helped to contain the surge. Our approach emphasizes the importance of early preparation of adequate outbreak response infrastructure and staff to implement interventions appropriately and consistently during a pandemic.


Asunto(s)
COVID-19 , Trazado de Contacto , Humanos , Universidades , COVID-19/epidemiología , COVID-19/prevención & control , Georgia/epidemiología , SARS-CoV-2 , Estudiantes , Brotes de Enfermedades/prevención & control
2.
Z Kinder Jugendpsychiatr Psychother ; 50(1): 54-67, 2021 Jan.
Artículo en Alemán | MEDLINE | ID: mdl-34397296

RESUMEN

International Consensus Statement for the Screening, Diagnosis, and Treatment of Adolescents with Concurrent Attention-Deficit/Hyperactivity Disorder and Substance Use Disorder Abstract. Background: Childhood attention-deficit/hyperactivity disorder (ADHD) is a risk factor for substance misuse and substance use disorder (SUD) in adolescence and (early) adulthood. ADHD and SUD also frequently co-occur in treatment-seeking adolescents, which complicates diagnosis and treatment and is associated with poor treatment outcomes. Research on the effect of treatment of childhood ADHD on the prevention of adolescent SUD is inconclusive, and studies on the diagnosis and treatment of adolescents with ADHD and SUD are scarce. Thus, the available evidence is generally not sufficient to justify robust treatment recommendations. Objective: The aim of the study was to obtain a consensus statement based on a combination of scientific data and clinical experience. Method: A modified Delphi study to reach consensus based upon the combination of scientific data and clinical experience with a multidisciplinary group of 55 experts from 17 countries. The experts were asked to rate a set of statements on the effect of treatment of childhood ADHD on adolescent SUD and on the screening, diagnosis, and treatment of adolescents with comorbid ADHD and SUD. Results: After 3 iterative rounds of rating and adapting 37 statements, consensus was reached on 36 of these statements representing 6 domains: general (n = 4), risk of developing SUD (n = 3), screening and diagnosis (n = 7), psychosocial treatment (n = 5), pharmacological treatment (n = 11), and complementary treatments (n = 7). Routine screening is recommended for ADHD in adolescent patients in substance abuse treatment and for SUD in adolescent patients with ADHD in mental healthcare settings. Long-acting stimulants are recommended as the first-line treatment of ADHD in adolescents with concurrent ADHD and SUD, and pharmacotherapy should preferably be embedded in psychosocial treatment. The only remaining no-consensus statement concerned the requirement of abstinence before starting pharmacological treatment in adolescents with ADHD and concurrent SUD. In contrast to the majority, some experts required full abstinence before starting any pharmacological treatment, some were against the use of stimulants in the treatment of these patients (independent of abstinence), while some were against the alternative use of bupropion. Conclusion: This international consensus statement can be used by clinicians and patients together in a shared decision-making process to select the best interventions and to reach optimal outcomes in adolescent patients with concurrent ADHD and SUD.


Asunto(s)
Trastorno por Déficit de Atención con Hiperactividad , Estimulantes del Sistema Nervioso Central , Trastornos Relacionados con Sustancias , Adolescente , Adulto , Trastorno por Déficit de Atención con Hiperactividad/diagnóstico , Trastorno por Déficit de Atención con Hiperactividad/epidemiología , Trastorno por Déficit de Atención con Hiperactividad/terapia , Estimulantes del Sistema Nervioso Central/uso terapéutico , Niño , Comorbilidad , Humanos , Tamizaje Masivo , Trastornos Relacionados con Sustancias/diagnóstico , Trastornos Relacionados con Sustancias/epidemiología , Trastornos Relacionados con Sustancias/terapia
3.
J Psychopharmacol ; 35(11): 1411-1419, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34311606

RESUMEN

BACKGROUND: Most people often consume alcohol cumulatively and gradually. Yet almost scientific knowledge about alcohol's acute effects on cognition, behavior, and affect stems from laboratory studies that employ a single beverage administration procedure. OBJECTIVE: This study tests the hypothesis that alcohol's acute effects depend on both methods of administration and alcohol blood level. We introduce a new laboratory procedure for studying cumulative alcohol drinking and examine alcohol's effects on emotion recognition as a function of both alcohol administration method and alcohol blood level. METHODS: Participants were recruited for one of two studies. One study employed a between-subject design using a single alcoholic dose. Participants were randomly assigned to drink either placebo (0.00%), low (0.03%), moderate (0.06%), or high (0.09%) alcohol levels. The second study employed a within-subject design using a cumulative alcoholic administration method, in which each participant drank four drinks (placebo, followed by three alcoholic drinks). Both groups reached similar breath alcohol concentrations. In both studies, participants attended a single study session, in which emotion recognition was examined following alcohol administration. RESULTS: Single alcoholic beverage administration method caused greater impairment in emotion recognition ability, specifically for anger, happiness, and fear, as compared with cumulative administration method, even though breath alcohol levels were similar in both conditions. CONCLUSIONS: This paper presents questions concerning the internal validity of previous laboratory studies that use a single beverage administration procedure. Insights into the effects of alcohol on behavior, as well as regarding our knowledge about models of addiction are presented.


Asunto(s)
Consumo de Bebidas Alcohólicas/psicología , Etanol/administración & dosificación , Reconocimiento Facial/efectos de los fármacos , Adulto , Bebidas Alcohólicas , Nivel de Alcohol en Sangre , Pruebas Respiratorias , Método Doble Ciego , Etanol/sangre , Etanol/farmacología , Femenino , Humanos , Masculino , Adulto Joven
4.
Eur Addict Res ; 26(4-5): 223-232, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32634814

RESUMEN

BACKGROUND: Childhood attention-deficit/hyperactivity disorder (ADHD) is a risk factor for substance misuse and substance use disorder (SUD) in adolescence and (early) adulthood. ADHD and SUD also frequently co-occur in treatment-seeking adolescents, which complicates diagnosis and treatment and is associated with poor treatment outcomes. Research on the effect of treatment of childhood ADHD on the prevention of adolescent SUD is inconclusive, and studies on the diagnosis and treatment of adolescents with ADHD and SUD are scarce. Thus, the available evidence is generally not sufficient to justify robust treatment recommendations. OBJECTIVE: The aim of the study was to obtain a consensus statement based on a combination of scientific data and clinical experience. METHOD: A modified Delphi study to reach consensus based upon the combination of scientific data and clinical experience with a multidisciplinary group of 55 experts from 17 countries. The experts were asked to rate a set of statements on the effect of treatment of childhood ADHD on adolescent SUD and on the screening, diagnosis, and treatment of adolescents with comorbid ADHD and SUD. RESULTS: After 3 iterative rounds of rating and adapting 37 statements, consensus was reached on 36 of these statements representing 6 domains: general (n = 4), risk of developing SUD (n = 3), screening and diagnosis (n = 7), psychosocial treatment (n = 5), pharmacological treatment (n = 11), and complementary treatments (n = 7). Routine screening is recommended for ADHD in adolescent patients in substance abuse treatment and for SUD in adolescent patients with ADHD in mental healthcare settings. Long-acting stimulants are recommended as the first-line treatment of ADHD in adolescents with concurrent ADHD and SUD, and pharmacotherapy should preferably be embedded in psychosocial treatment. The only remaining no-consensus statement concerned the requirement of abstinence before starting pharmacological treatment in adolescents with ADHD and concurrent SUD. In contrast to the majority, some experts required full abstinence before starting any pharmacological treatment, some were against the use of stimulants in the treatment of these patients (independent of abstinence), while some were against the alternative use of bupropion. CONCLUSION: This international consensus statement can be used by clinicians and patients together in a shared decision-making process to select the best interventions and to reach optimal outcomes in adolescent patients with concurrent ADHD and SUD.


Asunto(s)
Trastorno por Déficit de Atención con Hiperactividad/diagnóstico , Consenso , Práctica Clínica Basada en la Evidencia , Tamizaje Masivo , Trastornos Relacionados con Sustancias , Adolescente , Trastorno por Déficit de Atención con Hiperactividad/tratamiento farmacológico , Estimulantes del Sistema Nervioso Central/administración & dosificación , Técnica Delphi , Femenino , Salud Global , Humanos , Masculino , Factores de Riesgo , Trastornos Relacionados con Sustancias/complicaciones , Trastornos Relacionados con Sustancias/terapia , Resultado del Tratamiento
5.
J Child Sex Abus ; 29(6): 697-716, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-31751186

RESUMEN

Recent studies were able to associate disgust with the moral domain of purity, as well as a heightened sensitivity to disgust with sexual victimization. However, no empirical evidence has yet to document the exact relation between sexual victimization and its impact on the moralization of purity. Therefore, the present study aimed to examine the relationship between child sexual abuse (CSA) and the moral domain of purity, by means of judgments toward three different types of disgust: pathogen, sexual and moral. To test this, The Three Domains of Disgust Scale (TDDS) was given to both CSA participants (n = 29) and to a non-sexually abused population (N-SAP; n = 31). . Results have shown a statistically significant difference between the CSA and N-SAP groups on the combined dependent variables (i.e., pathogen, sexual and moral disgust). However, only the sexual disgust domain, out of the other two domains has been found to hold significance. Furthermore, consistent with previous empirical findings, similar gender patterns of moral judgments have been found between the two groups (i.e., CSA and N-SAP), though with a statistical significance only in the sexual domain. Implications of these findings are discussed.


Asunto(s)
Ira , Abuso Sexual Infantil/psicología , Emoción Expresada/fisiología , Miedo/psicología , Juicio , Adulto , Niño , Femenino , Humanos , Masculino , Valores Sociales , Adulto Joven
6.
Schizophr Res ; 208: 406-413, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30654922

RESUMEN

BACKGROUND: Childhood trauma increases the risk of schizophrenia, yet the role of adult sexual assault in the course of schizophrenia is unknown. This study aims to examine the associations between substance use and sexual assault severity characteristics with the course of schizophrenia among adult sexual assault victims using an epidemiologic study design. METHODS: Sexual assault data on all individuals received from 2000 to 2010 (N = 2147) at the Center for Care of Sexual Assault Victims at Wolfson Medical Center, the largest medical center for sexual assault victims in the country, were merged with the Israel National Psychiatric Case Registry, that consisted of lifetime psychiatric hospitalizations of schizophrenia (birth to 6 years post-assault). The associations between substance use and adult sexual assault severity characteristics with hospitalizations were quantified using recurrent events Cox modeling. RESULTS: Schizophrenia with sexual assault survivors occurred in 117 persons. Cox modeling showed that recurrent psychiatric hospitalizations were associated with younger age, sexual assault at older age, previous diagnosis of psychosis, and drug use shortly before or during the assault. Other assault characteristics (number of assailants, means of subdual, penetration type, perpetrator violence, physical injury of the victim) and immediacy of seeking help had a null association with the course of psychiatric hospitalization. These results replicated in two sensitivity analyses. CONCLUSIONS: Substance use among victims of sexual assault was associated with an exacerbated course of schizophrenia, pointing to a possibly modifiable risk factor that should be targeted in prevention, assessment, treatment formulation and implementation.


Asunto(s)
Esquizofrenia/diagnóstico , Psicología del Esquizofrénico , Delitos Sexuales/psicología , Trastornos Relacionados con Sustancias/psicología , Adulto , Áreas de Influencia de Salud , Femenino , Humanos , Israel , Estudios Longitudinales , Masculino , Factores de Riesgo
7.
Crit Rev Food Sci Nutr ; 56(12): 2021-35, 2016 Sep 09.
Artículo en Inglés | MEDLINE | ID: mdl-26068122

RESUMEN

The two basic questions in food intake study are what we eat, and how much do we eat. Most research is directed toward the control of how much is eaten. This is likely the result of the increased number of individuals with eating disorders in the Western world. Feeding behavior is highly complex, and is controlled by many psychological, physiological, biochemical, and immunological factors. The aim of this review is to clarify the involvement of fatty acids in eating disorders such as anorexia and binge eating disorder. The review will describe the modified fatty acid profile observed in individuals with anorexia or binge eating disorder, and discuss on what factors fatty acids can exert beneficial effects. In addition, the differences and similarities between anorexia and binge eating disorder will be discussed. We suggest that beneficial effects of essential fatty acids on both anorexia and binge eating disorder can be explained by the stabilizing effect of those fatty acids on the neuronal membrane fluidity index.


Asunto(s)
Anorexia Nerviosa , Ácidos Grasos Esenciales/fisiología , Obesidad , Animales , Anorexia Nerviosa/fisiopatología , Trastorno por Atracón/fisiopatología , Barrera Hematoencefálica , Encéfalo , Dieta , Conducta Alimentaria , Trastornos de Alimentación y de la Ingestión de Alimentos/fisiopatología , Humanos , Fluidez de la Membrana , Vaina de Mielina , Neuronas/fisiología , Neurotransmisores , Obesidad/fisiopatología
8.
Cyberpsychol Behav Soc Netw ; 18(10): 581-7, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26383549

RESUMEN

Cognitive biases have previously been recognized as key mechanisms that contribute to the development, maintenance, and relapse of addictive behaviors. The same mechanisms have been recently found in problematic computer gaming. The present study aims to investigate whether excessive massively multiplayer online role-playing gamers (EG) demonstrate an approach bias toward game-related cues compared to neutral stimuli; to test whether these automatic action tendencies can be implicitly modified in a single session training; and to test whether this training affects game urges and game-seeking behavior. EG (n=38) were randomly assigned to a condition in which they were implicitly trained to avoid or to approach gaming cues by pushing or pulling a joystick, using a computerized intervention (cognitive bias modification via the Approach Avoidance Task). EG demonstrated an approach bias for gaming cues compared with neutral, movie cues. Single session training significantly decreased automatic action tendencies to approach gaming cues. These effects occurred outside subjective awareness. Furthermore, approach bias retraining reduced subjective urges and intentions to play, as well as decreased game-seeking behavior. Retraining automatic processes may be beneficial in changing addictive impulses in EG. Yet, large-scale trials and long-term follow-up are warranted. The results extend the application of cognitive bias modification from substance use disorders to behavioral addictions, and specifically to Internet gaming disorder. Theoretical implications are discussed.


Asunto(s)
Terapia Conductista , Conducta Adictiva/psicología , Señales (Psicología) , Recreación , Juegos de Video/psicología , Adolescente , Adulto , Cognición , Humanos , Internet , Masculino , Desempeño de Papel , Resultado del Tratamiento , Adulto Joven
9.
J Psychoactive Drugs ; 47(2): 91-9, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25950588

RESUMEN

Two studies informed by the terror management health model were conducted to examine the question of how death cognition affects cannabis craving and whether actual cannabis smoking alleviates death cognitions. The first study examined whether priming thoughts of death are associated with subjective cannabis craving among 42 frequent cannabis users randomly assigned to either a mortality salience or control task. When reminded of their death, participants craved cannabis, even though there was no change in their conscious negative mood. The second study examined the effect of cannabis smoking on death cognitions in an exploratory field setting. Fifty frequent cannabis users were randomly assigned to either mortality reminders or control task and completed death-related words accessibility measures before and after smoking cannabis. Results indicate that cannabis served as a buffer and prevented death-related thoughts from entering consciousness, thus acting as a defense mechanism against death anxiety. These findings indicate that death-related concerns may play a hitherto unsuspected role in cannabis craving and consumption. Also discussed are the implications of a terror management perspective in communication of negative health consequences of recreational cannabis smoking and in the use of cannabis for medical purposes among people with terminal illness.


Asunto(s)
Actitud Frente a la Muerte , Cannabinoides/farmacología , Ansia , Muerte , Emociones/efectos de los fármacos , Fumar Marihuana/psicología , Sexualidad , Adulto , Conducta de Elección/efectos de los fármacos , Estado de Conciencia/efectos de los fármacos , Femenino , Humanos , Masculino , Sexualidad/efectos de los fármacos , Sexualidad/psicología , Encuestas y Cuestionarios , Inconsciente en Psicología
10.
J Neural Transm (Vienna) ; 122(5): 629-41, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25292362

RESUMEN

Our previous study demonstrated that an olfactory bulbectomy in rats induced short-term, multifaceted, devastating Alzheimer's-like effects, which included cognitive impairment, hyperactivity, hyperthermia, and increased levels of homocysteine and pro-inflammatory cytokines, including IL-17A. In addition, the rats exhibited an increase in the hyperphosphorylation of brain Tau proteins and in the number of neurofibrillary tangles. Here, we examined the long-term effects of the surgery and found that olfactory bulbectomy also rendered the rats to become anemic with brain iron overload. Additionally, a significant reduction in the membrane fluidity index in frontal cortex synaptosomes was found. Treatment with a mixture of n - 3/n - 6 of fatty acids restored the unwanted effect. The beneficial effects of fatty acids are mediated via the effects of fatty acids on the neuronal membrane structure and fluidity. These findings are similar to Alzheimer's symptoms, which suggest this model can be used as an animal model for Alzheimer's disease. We recommend using this model to scan potential new anti-Alzheimer's drugs.


Asunto(s)
Encéfalo/efectos de los fármacos , Ácidos Grasos/administración & dosificación , Enfermedades Neurodegenerativas/tratamiento farmacológico , Neuronas/efectos de los fármacos , Fármacos Neuroprotectores/administración & dosificación , Bulbo Olfatorio/fisiopatología , Enfermedad de Alzheimer , Animales , Reacción de Prevención/efectos de los fármacos , Reacción de Prevención/fisiología , Regulación de la Temperatura Corporal/efectos de los fármacos , Regulación de la Temperatura Corporal/fisiología , Encéfalo/metabolismo , Colesterol/metabolismo , Citocinas/sangre , Modelos Animales de Enfermedad , Ingestión de Alimentos/efectos de los fármacos , Ingestión de Alimentos/fisiología , Homocisteína/metabolismo , Hierro/metabolismo , Masculino , Aprendizaje por Laberinto/efectos de los fármacos , Aprendizaje por Laberinto/fisiología , Actividad Motora/efectos de los fármacos , Actividad Motora/fisiología , Enfermedades Neurodegenerativas/fisiopatología , Enfermedades Neurodegenerativas/psicología , Neuronas/metabolismo , Ratas Long-Evans , Sinaptosomas/efectos de los fármacos , Sinaptosomas/metabolismo
11.
Int J Offender Ther Comp Criminol ; 59(6): 654-79, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24285832

RESUMEN

This study explores men's motivation and justification to remain married to their criminal, imprisoned wives. Using semistructured interviews and content-analysis, data were collected and analyzed from eight men who maintain stable marriage relationships with their incarcerated wives. Participants are normative men who describe incarceration as a challenge that enhances mutual responsibility and commitment. They exaggerate the extent to which their partners resemble archetypal romantic ideals. They use motivational accounts to explain the woman's criminal conduct, which is perceived as nonrelevant to her real identity. Physical separation and lack of physical intimacy are perceived as the major difficulties in maintaining their marriage relations. Length of imprisonment and marriage was found to be related to the decision whether to continue or terminate the relationships. Women-inmates' partners experience difficulties and use coping strategies very similar to those cited by other normative spouses facing lengthy separation.


Asunto(s)
Toma de Decisiones , Estado Civil , Prisioneros/psicología , Esposos/psicología , Adaptación Psicológica , Adulto , Divorcio/psicología , Femenino , Humanos , Entrevista Psicológica , Israel , Masculino , Matrimonio/psicología , Persona de Mediana Edad , Motivación , Responsabilidad Social
12.
J Psychopharmacol ; 28(8): 804-9, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24899596

RESUMEN

Cigarette smoke induces oxidative stress with subsequent polyunsaturated fatty acids (PUFAs) peroxidation. Low concentrations of omega-3 PUFAs can affect neurotransmission, resulting in hypofunctioning of the mesocortical systems associated with reward and dependence mechanisms and thus may increase cigarette craving, hampering smoking cessation efforts. PUFA deficiency, in particular eicosapentaenoic acid (EPA; 20:5 n-3) and docosahexaenoic acid (DHA; 22:6 n-3), has also been linked to reduced psychological health and ability to cope with stress. Although stress is well linked to smoking urges and behavior, no research to date has examined the effects of PUFA supplementation on tobacco craving. In this double-blind, randomized, placebo-controlled pilot study, performed in regular cigarette smokers (n=48), administration of 2710 mg EPA/day and 2040 mg DHA/day for one month was accompanied by a significant decrease in reported daily smoking and in tobacco craving following cigarette cue exposure. Craving did not return to baseline values in the month that followed treatment discontinuation. This is the first study demonstrating that omega-3 PUFA supplementation reduces tobacco craving in regular smokers, compared to placebo treatment. Thus, omega-3 PUFAs may be of benefit in managing tobacco consumption. Further studies are needed on larger samples to explore the possible therapeutic implications for heavy cigarette smokers.


Asunto(s)
Ansia/efectos de los fármacos , Ácidos Docosahexaenoicos/farmacología , Ácido Eicosapentaenoico/farmacología , Fumar/tratamiento farmacológico , Adolescente , Adulto , Ácidos Docosahexaenoicos/uso terapéutico , Método Doble Ciego , Ácido Eicosapentaenoico/uso terapéutico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Proyectos Piloto , Fumar/psicología , Prevención del Hábito de Fumar , Adulto Joven
13.
Int J Offender Ther Comp Criminol ; 57(12): 1522-45, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23070953

RESUMEN

Conjugal visits are believed to have positive effects during and after confinement. Yet, studies on the dynamics of such visits from women's point of view and their attitudes toward such visits are sparse. This study sought to identify and analyze female inmates' attitudes toward conjugal visits, describe the dynamics of conjugal visitations, and examine the meaning of conjugal visitation programs to the participants. The findings of this study reveal that (a) female inmates perceive conjugal visits as a significant and positive program in the prison, (b) these visits ease their pains of imprisonment and help to strengthen their relationships with their partners, and (c) nevertheless, the inmates express some criticism toward the poor condition of the visitation facilities and their unsatisfactory upkeep, claiming that such conditions limit their ability to feel and act freely during the meetings.


Asunto(s)
Prisioneros/psicología , Parejas Sexuales , Adaptación Psicológica , Adulto , Comunicación , Femenino , Humanos , Relaciones Interpersonales , Entrevistas como Asunto , Israel , Masculino , Apego a Objetos , Prisiones
14.
Nutr Neurosci ; 11(4): 167-71, 2008 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-18681985

RESUMEN

Despite some successful interventions and the large research efforts on this topic, iron deficiency and anemia remain the most common nutritional disorders in the world today. Recently, several researchers indicated that early, induced, iron deficiency produced a long-lasting effect even if the hemoglobin and iron levels returned to normal values. Recent human studies showed that 10-12-year-old children, who were iron deficient at age 1 year, showed lower IQ scores. In this study, we tried to imitate this condition by inducing iron deficiency in rats at age 21 days, for 28 days, and then tested the rats on day 120. The former iron-deficient rats had normal hematological and motor activity values, and normal thermoregulatory response, but they were very slow learners compared to the control rats. Treatment with a mixture of essential fatty acids improved their learning capacity.


Asunto(s)
Anemia Ferropénica/complicaciones , Cognición , Ácidos Grasos Esenciales/uso terapéutico , Anemia Ferropénica/tratamiento farmacológico , Anemia Ferropénica/fisiopatología , Animales , Hemoglobinas/análisis , Hierro/sangre , Hierro de la Dieta/administración & dosificación , Discapacidades para el Aprendizaje/tratamiento farmacológico , Discapacidades para el Aprendizaje/etiología , Masculino , Aprendizaje por Laberinto , Actividad Motora , Ratas , Ratas Long-Evans
15.
Nutr Neurosci ; 10(5-6): 269-71, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-18284035

RESUMEN

Rapid eye movements (REM) deprivation induces complex deteriorating effects, which include brain morphological changes such as reduced neurogenesis processes, brain neurochemical and hormonal modifications, and cognitive decline. One of the major effects of REM deprivation is an increased anxiety level. The aim of this study was to examine the effects ofpretreatment with a specific mixture of essential fatty acids on the increased level of anxiety on the behavioral level (elevated plus maze), on the hormonal level (corticosterone level) and on the physiological level (thermoregulation). The results showed that pretreatment with a mixture of essential fatty acids protect the rats from the anxiolytic effects of REM deprivation. The effects of essential fatty acids on sleep mechanisms, on the one hand, and on anxiety levels, on the other hand, may explain the beneficial effects of the pretreatment.


Asunto(s)
Ansiedad/etiología , Ansiedad/prevención & control , Ácidos Grasos Esenciales/administración & dosificación , Privación de Sueño/complicaciones , Animales , Regulación de la Temperatura Corporal/efectos de los fármacos , Regulación de la Temperatura Corporal/fisiología , Corticosterona/sangre , Masculino , Ratas , Ratas Sprague-Dawley
16.
Nutr Neurosci ; 8(4): 265-7, 2005 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-16491653

RESUMEN

Test anxiety is an incapacitating academic syndrome. This study shows that administration of a polyunsaturated fatty acid mixture of omega-3 and -6 can improve the behavioral variables associated with this type of anxiety, i.e. appetite, mood, mental concentration, fatigue, academic organization and poor sleep, as well as lowering elevated cortisol level, with a corresponding reduction of anxiety.


Asunto(s)
Ansiedad/prevención & control , Evaluación Educacional , Ácidos Grasos Omega-3/administración & dosificación , Ácidos Grasos Omega-6/administración & dosificación , Afecto , Apetito , Humanos , Hidrocortisona/sangre , Ácido Linoleico/administración & dosificación , Masculino , Placebos , Escala de Ansiedad ante Pruebas , Ácido alfa-Linolénico/administración & dosificación
17.
Psychoneuroendocrinology ; 29(2): 113-24, 2004 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-14604595

RESUMEN

The role of fatty acids (FA) and their impact on nervous system activity and immune function has attracted much attention. The interest extends beyond a basic understanding of the potential role exerted by FA on the neuronal membrane and its properties, to the implications and clinical significance for many neurological disorders. This is especially true for epilepsy, where many conventional anticonvulsant preparations carry undesired side effects, and a significant number of patients remain refractory to the drug treatment. We report on a comparative examination in rats of carbamazepine (CBZ) and SR-3 (a fatty acid compound) with respect to seizure control efficiency, as well as protective features against cognitive impairment and cortisol level elevation. With pentylenetetrazol (PTZ) induced seizures pre-treated by CBZ, or SR-3, both CBZ and SR-3 were equally effective in providing seizure control and both were superior to the saline control. However SR-3 provided greater protection in Morris Water Maze performance and control of cortisol level elevation.


Asunto(s)
Anticonvulsivantes/farmacología , Carbamazepina/farmacología , Epilepsia/tratamiento farmacológico , Hidrocortisona/sangre , Ácidos Linolénicos/farmacología , Análisis de Varianza , Animales , Modelos Animales de Enfermedad , Epilepsia/sangre , Reacción de Fuga/efectos de los fármacos , Masculino , Aprendizaje por Laberinto/efectos de los fármacos , Fármacos Neuroprotectores/farmacología , Pentilenotetrazol , Ratas , Ratas Long-Evans , Convulsiones/inducido químicamente , Convulsiones/prevención & control , Ácido alfa-Linolénico/farmacología
18.
Neurobiol Aging ; 23(5): 843-53, 2002.
Artículo en Inglés | MEDLINE | ID: mdl-12392789

RESUMEN

In addition to a gradual loss of neurons in various brain regions, major biochemical changes in the brain affect the neuronal membrane that is the "site of action" for many essential functions including long-term potentiation (LTP), learning and memory, sleep, pain threshold, and thermoregulation. Normal physiological functioning includes the transmission of axonal information, regulation of membrane-bound enzymes, control of ionic channels and various receptors. All are highly dependent on membrane fluidity, where rigidity is increased during aging. The significantly higher level of cholesterol in aging neuronal membrane, the slow rate of cholesterol turnover, and the decreased level of total polyunsaturated fatty acids (PUFA) may result from poor passage rate via the blood-brain barrier, or from a decreased rate of incorporation into the membrane, or a decrease in the activities of delta-6 and delta-9 desaturase enzymes. The added oxidative stress, which leads to an increase of free radicals leading to a decrease in membrane fluidity, may respond to a restricted diet, and thereby overcome the damaging effects of the free radicals. A central focus of this review is that a specific ratio of n-3/n-6 PUFA can restore many of these age-related effects.


Asunto(s)
Envejecimiento/metabolismo , Ácidos Grasos Insaturados/metabolismo , Neuronas/metabolismo , Anciano , Membrana Celular/metabolismo , Humanos
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