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To identify production sites and action targets of neurotrophins during neurogenesis, we investigated immunoreactivities of neurotrophins and their tyrosine kinase receptors in the cerebral cortex of rat embryos. Two sets of ligand-receptor systems, brain-derived neurotrophic factor/TrkB and neurotrophin-3/TrkC, were expressed simultaneously in(More)
Diabetes is known to be one of the risk factors for dementia; however, neuropathic changes in the brain of patients with the disease have not been completely revealed. So in the present study, we investigated the brain function of rats with diabetes induced by streptozotocin (STZ), one of the most commonly used animal models for diabetes. In the diabetic(More)
BACKGROUND There are few efficacious medications for drug dependence. We investigated the potential of Leu-Ile, which induces the expression of glial cell line-derived neurotrophic factor (GDNF) and tumor necrosis factor-alpha (TNF-alpha), as a novel therapeutic agent for methamphetamine (METH)-induced dependence. METHODS The levels of GDNF and TNF-alpha(More)
Expression of neurotrophins in pure microglia cultured from embryonic rat brain and the effects of lipopolysaccharide (LPS) on the expression were investigated. In untreated cultures, nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin (NT)-4/5 mRNAs were detected by use of reverse transcriptase-polymerase chain reaction(More)
The effects of transforming growth factor (TGF)-beta1 on expression of brain-derived neurotrophic factor (BDNF) and its high-affinity receptor, TrkB, in neurons cultured from the cerebral cortex of 18-day-old embryonic rats were examined. BDNF mRNA was significantly increased from 24-48 hr after the TGF-beta1 treatment over 20 ng/ml. Accumulation of BDNF(More)
Dietary deprivation of alpha-linolenic acid (n-3) through two generations has been shown to lower performance in an operant-type brightness-discrimination learning test in rats. Here, we examined a possible correlation between nerve growth factor (NGF) content and n-3 fatty acid status in the brain. Female rats were fed a semipurified diet supplemented with(More)
Glial cell line-derived neurotrophic factor (GDNF) is an important neurotrophic factor that has therapeutic implications for neurodegenerative disorders. We previously showed that leucine-isoleucine (Leu-Ile), an analog of a dipeptide-like structure of FK506 (tacrolimus), induces GDNF expression both in vivo and in vitro. In this investigation, we sought to(More)
To elucidate a significance of the expression of brain-derived neurotrophic factor (BDNF) in the activated microglia/macrophages of the injured central nervous system, we examined BDNF actions on or BDNF synthesis by macrophages cultured from the mouse peritoneal cavity. They synthesized BDNF and neurotrophin-3 (NT-3) in addition to expressing high-affinity(More)
Depression-like behavior is often complicated by chronic pain. Antidepressants including imipramine (IMI) are widely used to treat chronic pain, but the mechanisms are not fully understood. Brain-derived neurotrophic factor (BDNF) is a neuromodulator that reduces depression by regulating synaptic transmission. We aimed to characterize the antidepressant(More)
A sensitive two-site enzyme immunoassay system for mouse beta nerve growth factor (NGF) was developed, based on the sandwiching of the antigen between anti-mouse beta NGF antibody IgG coated to a polystyrene tube and anti-mouse beta NGF antibody Fab'-linked beta-D-galactosidase (beta-D-galactoside hydrolase, EC 3.2.1.23). This method has the following(More)