RESUMO
The serious neuropsychological repercussions of hepatic encephalopathy have led to the creation of several experimental models in order to better understand the pathogenesis of the disease. In the present investigation, two possible causes of hepatic encephalopathy, cholestasis and portal hypertension, were chosen to study the behavioral impairments caused by the disease using an object recognition task. This working memory test is based on a paradigm of spontaneous delayed non-matching to sample and was performed 60 days after surgery. Male Wistar rats (225-250 g) were divided into three groups: two experimental groups, microsurgical cholestasis (N = 20) and extrahepatic portal hypertension (N = 20), and a control group (N = 20). A mild alteration of the recognition memory occurred in rats with cholestasis compared to control rats and portal hypertensive rats. The latter group showed the poorest performance on the basis of the behavioral indexes tested. In particular, only the control group spent significantly more time exploring novel objects compared to familiar ones (P < 0.001). In addition, the portal hypertension group spent the shortest time exploring both the novel and familiar objects (P < 0.001). These results suggest that the existence of portosystemic collateral circulation per se may be responsible for subclinical encephalopathy.
Assuntos
Colestase/complicações , Modelos Animais de Doenças , Encefalopatia Hepática/etiologia , Hipertensão Portal/complicações , Memória/fisiologia , Reconhecimento Visual de Modelos/fisiologia , Reconhecimento Psicológico/fisiologia , Animais , Comportamento Exploratório/fisiologia , Encefalopatia Hepática/fisiopatologia , Encefalopatia Hepática/psicologia , Masculino , Ratos , Ratos Wistar , Análise e Desempenho de Tarefas , Fatores de TempoRESUMO
The serious neuropsychological repercussions of hepatic encephalopathy have led to the creation of several experimental models in order to better understand the pathogenesis of the disease. In the present investigation, two possible causes of hepatic encephalopathy, cholestasis and portal hypertension, were chosen to study the behavioral impairments caused by the disease using an object recognition task. This working memory test is based on a paradigm of spontaneous delayed non-matching to sample and was performed 60 days after surgery. Male Wistar rats (225-250 g) were divided into three groups: two experimental groups, microsurgical cholestasis (N = 20) and extrahepatic portal hypertension (N = 20), and a control group (N = 20). A mild alteration of the recognition memory occurred in rats with cholestasis compared to control rats and portal hypertensive rats. The latter group showed the poorest performance on the basis of the behavioral indexes tested. In particular, only the control group spent significantly more time exploring novel objects compared to familiar ones (P < 0.001). In addition, the portal hypertension group spent the shortest time exploring both the novel and familiar objects (P < 0.001). These results suggest that the existence of portosystemic collateral circulation per se may be responsible for subclinical encephalopathy.
Assuntos
Animais , Masculino , Ratos , Colestase/complicações , Modelos Animais de Doenças , Encefalopatia Hepática/etiologia , Hipertensão Portal/complicações , Memória/fisiologia , Reconhecimento Visual de Modelos/fisiologia , Reconhecimento Psicológico/fisiologia , Comportamento Exploratório/fisiologia , Encefalopatia Hepática/fisiopatologia , Encefalopatia Hepática/psicologia , Ratos Wistar , Análise e Desempenho de Tarefas , Fatores de TempoRESUMO
The etiology of PMS has not yet been defined, although there are several theories among which it is reported that there is an increase in prolactine levels involved in it. The purpose of this study was to evaluate a dopamine receptor agonist (lisuride maleate), in the treatment of PMS. 35 patients between 19 and 35 years old were recruited in a prospective study design, with diagnosis of PMS and no other gynecological disorder ruled out clinical and ultrasonographic examination, women with no previous treatment and with no use of hormonal agents, these patients were treated for three months with lisuride maleate, 0.3 mg-day in a three dosage scheme per day, the following symptoms were evaluated: headaches, mastalgia, bloating, edema of lower extremities and myalgia in legs, as well as hormonal parameters before and after treatment with estrogens, progesterone, prolactine, luteinizing hormone (LH), follicle stimulating hormone (FSH) and testosterone, which were prescribed in the luteal phase (day 21). Results obtained were: reduction of all symptoms scores versus pretreatment: Headache from 85.7 to 20%, mastalgia from 91.4 to 25%, bloating from 74.2 to 40%, edema in lower extremities from 85.7 to 30%, myalgia in legs, from 61 to 34%. The hormonal profile only showed changes in FSH, since the basal pretreatment level was found in 18.6 and the post-treatment value was 13.86, progesterone from 2.7 to 4.6 and prolactine from 7.74 to 6.82. We conclude the lisuride maleate is a good option to the PMS treatment, since a significative reduction of symptoms are induced and it is well tolerated.