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Showing 2 results for Tyrosine Kinase B (trkb)

Mohammad Reza Jalilvand, Ziya Fallah Mohammadi, Ali Yaghoubi,
Volume 11, Issue 3 (12-2019)
Abstract

Introduction: Brain derived neurotrophic factor (BDNF) have neuroprotective effect through binding with tyrosine kinase B (TrkB). Thus the Aim of the present study was to investigate the effects of eight weeks endurance training on BDNF and TrkB levels in the hippocampus of ischemic induced male rats.
Methods: 40 Male wistar rats (12 weeks old and 228.19±21.18g) were divided into four groups, including: ischemic control, ischemic training, healthy control, healthy training. To induce ischemia, carotid artery is clamped with microsurgery clamp for 45 minutes. Training groups (healthy and ischemic), trained with 30m/min (70% VO2max), 30min/day, and 5 days/week on the treadmill. BDNF and TrkB levels of the hippocampus were measured using ELISA method.For data analysis, one-way ANOVA and post hoc Tukey tests were performed at a significance level of P˂0.05.
Results: The results showed that BDNF levels in hippocampus of ischemic control group were significantly lower than healthy control and healthy training group (P values 0.001, 0.002 respectively). No significant differences were found between BDNF levels in ischemic training with ischemic control and healthy control group (p values 0.54, 0.091 respectively) and No significant differences were found between TrkB levels in ischemic control with healthy control and ischemic control group (p values 0.675, 0.821 respectively). TrkB level in healthy training group was significantly higher than healthy control, healthy training groups (P=0.001).
Conclusions: Based on these results, it seems that endurance training can have neuroprotective effect through increasing the level of BDNF and TrkB level in hippocampus of ischemic rats and can be studied as a complementary therapy in ischemic disease.

Mohammad Reza Jalilvand, Ziya Fallahmohammadi, Ali Yaghoubi,
Volume 12, Issue 1 (6-2020)
Abstract

Introduction: Binding of mature brain derived neurotrophic factor (BDNF) to tyrosine kinase B (TrkB) receptor leads to cell survival, while proBDNF binding to p75 receptor leads to cell death. Thus the aim of the present study was to investigate the effects of eight weeks pre-conditioning endurance training on BDNF, TrkB, proBDNF and p75 levels in the hippocampus male rats following ischemic reperfusion. Methods: 40 male wistar rats (12 weeks old and 236.56 ± 16.98g) were divided into four groups, including: ischemic control, ischemic training, healthy control, healthy training. Training groups (healthy and ischemic), trained with 30m/min (70% VO2max), 30min/day, and 5 days/week for 8 weeks on the treadmill. To induce ischemia (in ischemic groups), carotid artery is clamped with microsurgery clamp for 45 minutes. For data analysis, one-way ANOVA and post hoc Tukey tests were performed at a significance level of P ˂ 0.05.
Results: The results showed that BDNF levels in hippocampus of ischemic control group were significantly lower than healthy control group (P = 0.001). Also BDNF levels in hippocampus of ischemic training group were higher than ischemic control group (P = 0.002). TrkB levels in control group were significantly lower than healthy control group (P = 0.026). But despite increasing in TrkB levels of ischemic training group than ischemic control group wasn’t significant (P = 0.556). proBDNF levels in ischemic control group were significantly higher than healthy control group (P = 0.001). No significant difference were found in proBDNF levels of ischemic training group than ischemic control (P = 0.418). No significant difference were found in p75 levels in difference were found in different group (P = 0.071).
Conclusions: Based on these results, it seems that pre-conditioning endurance training can have neuroprotective effect through improving BDNF, TrkB and proBDNF levels in hippocampus and can prevent apoptosis and neuronal death following ischemic reperfusion and can be studied as a complementary therapy in ischemic disease.


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