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           Search results for: Human Brain derived neurotrophic facor,BDNF ELISA Kit   

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Metabolomics and proteomics profiles of some medicinal plants and correlation with BDNF activity.

Identification of the low abundance of phytochemicals in plant extracts is very difficult. Pharmacological activity observed in such plants is not due to a single compound. In most cases, plant extracts show activity based on synergistic or antagonistic effects. Therefore, the idea of a holistic approach is more rational.

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The roles of valerenic acid on BDNF expression in the SH-SY5Y cell.

The roots of L. (Valerianaceae) are used for treating sleep disorders and/or mild nerve tension. The effect of valerenic acid on brain-derived neurotrophic factor (BDNF) has not yet been studied, although it is known that gamma-amino butyric acid A (GABA) receptor is regulated by BDNF, which modulates the depressive-like behavior and neurogenesis. The purpose of this study is to determine the effect of root extract (VO), its main constituents valerenic acid (VA) and acetoxy valerenic acid (AVA) as well as valerenic acid-free (VAF), acetoxy valerenic acid-free (AVAF) extracts and increasing amounts of valerenic acid containing extracts on the BDNF expression in SH-SY5Y cell lines. The effect of methanolic extracts of VO, VA, AVA, VAF, AVAF, and the extracts whose amount of VA were increased gradually, were tested using a Human BDNF ELISA kit with 17-estradiol as a positive control. The VO and VA extracts caused a significant ( < 0.001) increase in the BDNF expression in SH-SY5Y cells compared to control. This effect completely disappeared when cells were treated with VAF extract. AVA alone did not show any significant change in the BDNF levels. The extracts with increasing amount of VA led to a concentration- dependent effect on the cells. In conclusion, our findings suggest that the antidepressant-like effect of the VO extract is also related to BDNF expression, and that this is mainly due to the presence of VA in the extract. Removing VA from VO extract leads to a loss of activity. Moreover, the concentration of VA plays a role for BDNF expressions in SH-SY5Y cells, which demonstrates the importance of quality control on the commercially available products.

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RELATIONSHIP BETWEEN STAGES OF DIABETIC RETINOPATHY AND LEVELS OF BRAIN-DERIVED NEUROTROPHIC FACTOR IN AQUEOUS HUMOR AND SERUM.

The aim of the study was to determine aqueous humor and serum levels of brain-derived neurotrophic factor (BDNF) in diabetic patients with and without retinopathy.

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Serum GDNF levels and anxiety disorders in a population-based study of young adults.

The aim of this study was to verify the serum GDNF levels in individuals with anxiety disorder (AD) in a population-based study.

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Serum brain-derived neurotrophic factor level and exercise tolerance complement each other in predicting the prognosis of patients with heart failure.

Brain-derived neurotropic factor (BDNF) is a myokine that plays a key role in regulating survival, growth, and maintenance of neurons. We investigated whether the serum BDNF level at discharge could predict the prognosis in patients with heart failure (HF). Furthermore, we aimed to examine the relationship between this myokine and exercise tolerance. We prospectively enrolled 94 patients who were hospitalized for worsening HF and had cardiac rehabilitation. At discharge, the serum BDNF level of all patients was measured using a commercial ELISA kit and they underwent a cardiopulmonary exercise test to measure peak oxygen uptake (peak VO). Correlation was not observed between BDNF and peak VO. Kaplan-Meier analysis demonstrated that cardiac death or rehospitalization owing to worsening HF was significantly higher in the low BDNF group (p = 0.023). The combination of peak VO and BDNF levels led to the identification of subgroups with significantly different probabilities of events (p = 0.005). In particular, in the low BDNF and low peak VO group, the frequency of rehospitalization within half a year after discharge was much higher than that in other groups. Multivariate analysis found BDNF as an independent factor of adverse events (hazard ratio 0.956; 95% confidence interval 0.911-0.999; p = 0.046). The serum BDNF level at discharge may be a useful biomarker of the prognosis in patients with HF. Furthermore, combining BDNF and peak VO may be useful for predicting early cardiac events.

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Brain-derived neurotrophic factor is increased in serum levels of patients with symptomatic dermographism.

Symptomatic dermographism (SD) is the most common form of physical urticaria. However, the role of neuroimmune mechanisms in SD is unclear.

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Brief psychoeducation for bipolar disorder: Evaluation of trophic factors serum levels in young adults.

The aim of this study was to evaluate the impact of psychoeducation in serum levels of BDNF, NGF and GDNF in young adults presenting bipolar disorder (BD). This is a randomized clinical trial including 39 young adults (18-29 years) diagnosed with BD through the Structured Clinical Interview for DSM-IV (SCID-CV). Participants were randomized in two treatment groups: usual treatment (medication) and combined intervention (medication plus psychoeducation). Depressive symptoms were assessed using the Hamilton Depression Rating Scale (HDRS) and severity of manic and hypomanic symptoms was evaluated through the Young Mania Rating Scale (YMRS). The serum levels of trophic factors were measured with an ELISA kit. In both intervention groups, there was an improvement in depressive symptoms significantly between baseline and post-intervention. In the combined intervention, GDNF serum levels increased significantly from baseline to post-intervention. However, there were no differences in BDNF and NGF serum levels. In the usual treatment group, no changes were observed in serum levels of GDNF, BDNF, and NGF the post-intervention in individuals. Our data suggests that only combined intervention was effective in improving depressive symptoms and increasing GDNF levels in a sample of young adults with bipolar disorder.

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Cognitive impairment and BDNF serum levels.

To investigate the alterations of brain-derived neurotrophic factor (BNDF) serum levels in subjects with different intensity of cognitive impairment and different neurodegenerative processes.

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Cortisol and Brain-Derived Neurotrophic Factor Levels Prior to Treatment in Children With Obsessive-Compulsive Disorder.

In this study, we investigated serum brain-derived neurotrophic factor (BDNF), adrenocorticotropic hormone (ACTH), and cortisol levels between children with obsessive-compulsive disorder (OCD) prior to treatment and healthy controls. In addition, the study aimed to assess any correlations between OCD symptom severity and BDNF, ACTH, and cortisol levels.

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Decreased brain-derived neurotrophic factor plasma levels in psoriasis patients.

Brain-derived neurotrophic factor (BDNF) is associated with neuroplasticity and synaptic strength, and is decreased in conditions associated with chronic stress. Nevertheless, BDNF has not yet been investigated in psoriasis, a chronic inflammatory systemic disease that is exacerbated by stress. Therefore, our aim was to determine BDNF plasma levels in psoriasis patients and healthy controls. Adult patients (n=94) presenting with psoriasis for at least 1 year were enrolled, and age- and gender-matched with healthy controls (n=307) from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). Participants had neither a previous history of coronary artery disease nor current episode of major depression. BDNF plasma levels were determined using the Promega ELISA kit. A general linear model was used to compare BDNF levels in psoriasis patients and controls, with age, gender, systolic blood pressure, serum fasting glucose, blood lipid levels, triglycerides, smoking status, and body mass index examined. After adjusting for clinical and demographic variables, significantly decreased BNDF plasma levels were observed in psoriasis patients (P=0.01) (estimated marginal means of 3922 pg/mL; 95%CI=2660-5135) compared with controls (5788 pg/mL; 95%CI=5185-6442). Similar BDNF levels were found in both mild and severe cases of psoriasis. Our finding, that BDNF is decreased in psoriasis, supports the concept of a brain-skin connection in psoriasis. Further studies should determine if BDNF is increased after specific psoriasis treatments, and associated with different disease stages.

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