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Brain-derived neurotrophic factor (BDNF), or abrineurin, [5] is a protein [6] that, in humans, is encoded by the BDNF gene. [7] [8] BDNF is a member of the neurotrophin family of growth factors, which are related to the canonical nerve growth factor (NGF), a family which also includes NT-3 and NT-4/NT-5.
According to the United States National Library of Medicine's medical subject headings, the term neurotrophin may be used as a synonym for neurotrophic factor, [5] but the term neurotrophin is more generally reserved for four structurally related factors: nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin-3 (NT-3), and neurotrophin-4 (NT-4). [6]
The brain-derived neurotrophic factor/TrkB system promotes thymocyte survival, as studied in the thymus of mice. [8] Other experiments suggest BDNF is more important and necessary for neuronal survival than other factors. [ 5 ]
Tropoflavin, also known as 7,8-dihydroxyflavone (DHF), is a naturally occurring flavone found in Godmania aesculifolia, Tridax procumbens, and primula tree leaves. [2] [3] [4] It has been found to act as a potent and selective small-molecule agonist of the tropomyosin receptor kinase B (TrkB) (K d ≈ 320 nM), the main signaling receptor of the neurotrophin brain-derived neurotrophic factor ...
Rs6265, also called Val66Met or G196A, is a gene variation, a single nucleotide polymorphism (SNP) in the BDNF gene that codes for brain-derived neurotrophic factor. Well over a hundred research studies have examined the polymorphism.
The first discovered non-protein neurotrophic natural product was lactacystin, isolated from a culture broth of Streptomyces sp. [40] Magnolol and honokiol, the main constituents of Magnolia officinalis and Magnolia obovata stem bark, have been reported to have neurotrophic activity in primary cultured rat cortical by enhancing the BDNF expression.
Furthermore, l-DOPA itself mediates neurotrophic factor release by the brain and CNS. [3] [4] In some plant families (of the order Caryophyllales), l-DOPA is the central precursor of a biosynthetic pathway that produces a class of pigments called betalains. [5]
Tropomyosin receptor kinase B (TrkB), [5] [6] [7] also known as tyrosine receptor kinase B, or BDNF/NT-3 growth factors receptor or neurotrophic tyrosine kinase, receptor, type 2 is a protein that in humans is encoded by the NTRK2 gene. [8] TrkB is a receptor for brain-derived neurotrophic factor (BDNF).
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