Cyclotraxin B

TrkB receptor antagonist CAS# 1203586-72-4

Cyclotraxin B

Catalog No. BCC6357----Order now to get a substantial discount!

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Chemical structure

Cyclotraxin B

3D structure

Chemical Properties of Cyclotraxin B

Cas No. 1203586-72-4 SDF Download SDF
PubChem ID 90489002 Appearance Powder
Formula C48H73N13O17S3 M.Wt 1200.36
Type of Compound N/A Storage Desiccate at -20°C
Solubility Soluble to 2 mg/ml in water
Sequence CNPMGYTKEGC

(Modifications: Disulfide bridge between 1 - 11)

Chemical Name (3S,6R,11R,17S,20S,23S,26S,32S,35S)-6-amino-20-(4-aminobutyl)-3-(2-amino-2-oxoethyl)-17-(2-carboxyethyl)-23-[(1R)-1-hydroxyethyl]-26-[(4-hydroxyphenyl)methyl]-32-(2-methylsulfanylethyl)-2,5,13,16,19,22,25,28,31,34-decaoxo-8,9-dithia-1,4,12,15,18,21,24,27,30,33-decazabicyclo[33.3.0]octatriacontane-11-carboxylic acid
SMILES CC(C1C(=O)NC(C(=O)NC(C(=O)NCC(=O)NC(CSSCC(C(=O)NC(C(=O)N2CCCC2C(=O)NC(C(=O)NCC(=O)NC(C(=O)N1)CC3=CC=C(C=C3)O)CCSC)CC(=O)N)N)C(=O)O)CCC(=O)O)CCCCN)O
Standard InChIKey JLBMMJHZUYBFGX-ZHTCEXBHSA-N
Standard InChI InChI=1S/C48H73N13O17S3/c1-24(62)39-46(75)58-28(6-3-4-15-49)43(72)56-29(12-13-38(67)68)41(70)52-21-37(66)55-33(48(77)78)23-81-80-22-27(50)40(69)59-32(19-35(51)64)47(76)61-16-5-7-34(61)45(74)57-30(14-17-79-2)42(71)53-20-36(65)54-31(44(73)60-39)18-25-8-10-26(63)11-9-25/h8-11,24,27-34,39,62-63H,3-7,12-23,49-50H2,1-2H3,(H2,51,64)(H,52,70)(H,53,71)(H,54,65)(H,55,66)(H,56,72)(H,57,74)(H,58,75)(H,59,69)(H,60,73)(H,67,68)(H,77,78)/t24-,27+,28+,29+,30+,31+,32+,33+,34+,39+/m1/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of Cyclotraxin B

DescriptionAntagonist of TrkB receptors; inhibits BDNF-induced TrkB activity (IC50 = 0.30 nM). Allosterically alters TrkB receptor conformation but does not alter BDNF binding. Prevents BDNF-induced cold allodynia in mice. Also shown to exhibit putative anxiolytic properties in mice.

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References on Cyclotraxin B

Cyclotraxin-B, the first highly potent and selective TrkB inhibitor, has anxiolytic properties in mice.[Pubmed:20333308]

PLoS One. 2010 Mar 19;5(3):e9777.

In the last decades, few mechanistically novel therapeutic agents have been developed to treat mental and neurodegenerative disorders. Numerous studies suggest that targeting BDNF and its TrkB receptor could be a promising therapeutic strategy for the treatment of brain disorders. However, the development of potent small ligands for the TrkB receptor has proven to be difficult. By using a peptidomimetic approach, we developed a highly potent and selective TrkB inhibitor, cyclotraxin-B, capable of altering TrkB-dependent molecular and physiological processes such as synaptic plasticity, neuronal differentiation and BDNF-induced neurotoxicity. Cyclotraxin-B allosterically alters the conformation of TrkB, which leads to the inhibition of both BDNF-dependent and -independent (basal) activities. Finally, systemic administration of cyclotraxin-B to mice results in TrkB inhibition in the brain with specific anxiolytic-like behavioral effects and no antidepressant-like activity. This study demonstrates that cyclotraxin-B might not only be a powerful tool to investigate the role of BDNF and TrkB in physiology and pathology, but also represents a lead compound for the development of new therapeutic strategies to treat brain disorders.

Cyclotraxin-B, a new TrkB antagonist, and glial blockade by propentofylline, equally prevent and reverse cold allodynia induced by BDNF or partial infraorbital nerve constriction in mice.[Pubmed:22560237]

J Pain. 2012 Jun;13(6):579-89.

UNLABELLED: Several lines of evidence indicate that brain-derived neurotrophic factor (BDNF) plays a key role as a central pronociceptive modulator of pain, acting through postsynaptic TrkB receptors that trigger intracellular signaling cascades leading to central sensitization. The overall aim of this study was to investigate to what extent BDNF could participate in the generation and maintenance of trigeminal neuropathic pain. The results showed that acute intracisternal administration of nanogram doses of BDNF in naive mice elicited long-lasting, dose-related, cold allodynic responses to topical application of acetone onto vibrissal pad skin. The systemic administration of cyclotraxin-B (CTX-B), a new TrkB receptor antagonist, or propentofylline, an inhibitor of glial activation, was able to either prevent or reverse the effects of intracisternal BDNF on cold nociception. In addition, the blockade of TrkB receptor by CTX-B inhibited the mechanisms that either initiate or maintain cold allodynia in the ipsilateral vibrissal pad skin after unilateral constriction of the infraorbital nerve. These observations raise the possibility that BDNF is capable on its own of conveying many features of the signaling mechanisms that underlie central sensitization caused by nerve constriction. PERSPECTIVE: Although further studies are necessary to examine in detail the mechanisms underlying the strong anti-allodynic action of CTX-B, this compound may represent an interesting lead for the development of novel therapeutic strategies aimed at preventing and/or suppressing central sensitization associated with neuropathic pain.

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