Papers by Juana Villarroel
Frontiers in Psychiatry
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BMC Research Notes
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Revista de Neuro-Psiquiatria, 2013
Antecedentes: Las conductas agresivas e impulsivas han sido asociadas con disfunciones del sistem... more Antecedentes: Las conductas agresivas e impulsivas han sido asociadas con disfunciones del sistema serotoninérgicocentral. Polimorfismos del transportador de serotonina, de la triptófano hidroxilasa (TPH1) y de los receptoresserotoninérgicos 5HT1B y 5HT2C han sido vinculados a agresión e impulsividad. Varios estudios en depresiónmayor han demostrado que el alelo corto (S) del promotor del gen transportador de serotonina se asocia a una peorrespuesta a los inhibidores selectivos de la recaptación de serotonina (ISRS). Material y métodos: En este estudiose investigó la asociación entre la respuesta de la impulsividad al tratamiento con fluoxetina y polimorfismos deltransportador de serotonina, TPH1 y de los receptores 5HT1B y 5HT2C, en 49 pacientes con trastorno límite depersonalidad. Resultados: Los pacientes con el genotipo L/L del promotor del gen transportador de serotonina,evaluados mediante la Overt Aggression Scale-Modified (OAS-M), tuvieron una respuesta a fluoxetinasignificat...
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Revista chilena de neuro-psiquiatría, 2010
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Revista chilena de neuro-psiquiatría, 2013
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Medwave, 2005
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The world journal of biological psychiatry : the official journal of the World Federation of Societies of Biological Psychiatry, 2009
Borderline personality disorder is a severe mental disorder, whereas previous studies suggest exe... more Borderline personality disorder is a severe mental disorder, whereas previous studies suggest executive functions may be impaired. The aim of this study was to evaluate executive planning in a sample of 85 individuals.
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Psychiatric genetics, 2010
Disturbances in central serotonin function have been implicated in impulsive and aggressive behav... more Disturbances in central serotonin function have been implicated in impulsive and aggressive behavior. A deletion/insertion polymorphism within the 5-HT transporter promoter gene (5-HTTLPR) is thought to be associated with disturbed impulse control, anxiety, and depression. The serotonin transporter (5-HTT) is the primary action site for selective serotonin reuptake inhibitors (SSRIs). Several studies of major depression have shown that the l allele of 5-HTTLPR is associated with better SSRI antidepressant effects than the s allele.
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European Psychiatry, 2011
Brain derived neurotrophic factor (BDNF) is the most widely distributed and highly expressed neur... more Brain derived neurotrophic factor (BDNF) is the most widely distributed and highly expressed neurotrophin in the CNS. BDNF gene have been associated with increased risk psychiatric disorders. It has been described interaction between BDNF and serotonin system at a neural and genetic level. Neuroticism as a personality trait relevant in borderline personality disorder (BPD) has genetic inheritance and is associated with serotonergic dysfunction. Has been reported that BDNF Val66Met variant is associated with neuroticism in general population. The aim of this study is to test the association between Val66Met and neuroticism and evaluate if the presence of Val66Met allele interacts with polymorphism in promoter region of serotonin transporter gene (5-HTTLPR) for develop neuroticism in BPD. We evaluate personality with NEO PI R in 104 BPD subjects that did not meet criteria for axis I diagnoses and other personality disorders. Genetic analysis of BDNF was performed determining the prese...
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European Psychiatry, 2011
Neuroticism is characterized by emotional instability and the tendency to experience negative emo... more Neuroticism is characterized by emotional instability and the tendency to experience negative emotions such as anger, anxiety and depressed mood. Subjects with borderline personality disorder (BPD) present this personality dimension as a temperamental core trait. There has been proposed that neuroticism can appropriately describe the most important characteristics of BPD. The polymorphism in the promoter region of the serotonin transporter gene (5-HTTLPR) has been implicated in depression, anxiety and suicide. It is estimated that 5-HTTLPR polymorphism account to 7 to 9% of inherited variance of neuroticism in personality. The aim of this study is to evaluate the association between neuroticism and 5-HTTLPR polymorphism in BPD. We evaluate personality with NEO PI R inventory in 104 BPD subjects (76 female/28 male) that did not meet criteria for axis I diagnoses and other personality disorders. The genetic analysis of 5-HTTLPR were performed determining the presence of long and short...
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Veterinary Immunology and Immunopathology, 2005
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Neuroendocrinology, 2010
Passive immunization against inhibin with an anti-inhibin serum (AIS) during the diestrous phase ... more Passive immunization against inhibin with an anti-inhibin serum (AIS) during the diestrous phase in cycling rats increased follicle-stimulating hormone secretion, stimulated the ovaries and reduced the magnitude of the luteinizing hormone (LH) surge in the afternoon of proestrus. The involvement of gonadotrope progesterone receptor (PR) expression/action in the inhibitory effects of the follicle-stimulating hormone-dependent putative ovarian factor gonadotropin surge-attenuating factor on preovulatory LH secretion was studied in the absence of circulating free inhibin. Proestrous pituitaries from rats injected with AIS or a non-immune serum (NIS) were studied for determination of PR-AB and PR-B mRNAs by RT-PCR and PR-B and PR-A isoform proteins by Western blot. In addition, pituitaries from AIS- and NIS-injected rats were incubated and studied for PR-dependent LH secretion parameters: LH-releasing hormone (LHRH)-stimulated LH secretion, progesterone-potentiated LHRH-stimulated LH secretion and LHRH self-priming. Also, the effects of the antiprogestagen RU486 on these LH secretion parameters were evaluated and compared with those of AIS. Finally, gonadotrope PR phosphorylation was evaluated by immunohistochemistry. Results showed that the hyperstimulated ovaries of AIS-injected rats produce a factor, different from inhibin, that blocked LHRH self-priming and P-potentiation of LHRH-stimulated LH secretion. These effects were not due to decreased pituitary PR mRNAs, PR protein expression or PR protein B/A ratio. The inhibitory effect of AIS on PR-dependent LH secretion seemed to be due to gonadotrope PR dephosphorylation. Taken together, the findings indicated that the putative gonadotropin surge-attenuating factor affected LH surge through an inhibition of PR phosphorylation/action but not PR expression.
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Papers by Juana Villarroel