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Clinical data | |
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Other names | CTX-B |
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Chemical and physical data | |
Formula | C48H73N13O17S3 |
Molar mass | 1200.37 g·mol−1 |
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Cyclotraxin B (CTX-B) is a small (1200 Da) cyclic peptide and highly potent, selective, non-competitive antagonist or negative allosteric modulator of TrkB (IC50 = 0.30 nM), [1] [2] the main receptor of brain-derived neurotrophic factor (BDNF), which itself was derived from BDNF. [1] [3] It crosses the blood-brain-barrier with systemic administration and produces anxiolytic-like effects in animals, though notably not antidepressant-like effects. [1] [4] The compound has also been found to produce analgesic effects in animal models of neuropathic pain. [5] In addition to TrkB, CTX-B has been found to be an allosteric modulator of VEGFR2, one of the receptors of vascular endothelial growth factor (VEGF). [2]