ANATIBANT

Investigational

Details

Stereochemistry	ABSOLUTE
Molecular Formula	C34H36Cl2N6O5S
Molecular Weight	711.658
Optical Activity	UNSPECIFIED
Defined Stereocenters	1 / 1
E/Z Centers	0
Charge	0

SHOW SMILES / InChI

SMILES

CC1=CC(C)=C2C=CC=C(OCC3=C(Cl)C(=CC=C3Cl)S(=O)(=O)N4CCC[C@H]4C(=O)NCCCNC(=O)C5=CC=C(C=C5)C(N)=N)C2=N1

InChI

InChIKey=XUHBBTKJWIBQMY-MHZLTWQESA-N

InChI=1S/C34H36Cl2N6O5S/c1-20-18-21(2)41-31-24(20)6-3-8-28(31)47-19-25-26(35)13-14-29(30(25)36)48(45,46)42-17-4-7-27(42)34(44)40-16-5-15-39-33(43)23-11-9-22(10-12-23)32(37)38/h3,6,8-14,18,27H,4-5,7,15-17,19H2,1-2H3,(H3,37,38)(H,39,43)(H,40,44)/t27-/m0/s1

HIDE SMILES / InChI

Molecular Formula	C34H36Cl2N6O5S
Molecular Weight	711.658
Charge	0
Count	MOL RATIO 1 MOL RATIO (average)

Stereochemistry	ABSOLUTE
Additional Stereochemistry	No
Defined Stereocenters	1 / 1
E/Z Centers	0
Optical Activity	UNSPECIFIED

Description

Anatibant was a selective small-molecule antagonist of the bradykinin B2 receptor that was undergoing clinical development with Xytis and Fournier for the treatment of brain injuries. Anatibant reduces brain oedema in animal TBI models. Noserious toxicity was found in Phase 1 clinical trials. Following subcutaneous administration of clinically relevant doses, there were no systemic effects but there was pain, inflammation and nodule formation at the injection site. Anatibant inhibits the binding of BK to the B2 receptor. After subcutaneous injection Anatibant is bio-available and crosses the BBB.

CNS Activity

Originator

Approval Year

PubMed

Show entries

Title	Date	PubMed
The N-terminal of icatibant and bradykinin interact with the same Asp residues in the human B2 receptor.	2004 May 3	15140628
Autoradiographic analysis of mouse brain kinin B1 and B2 receptors after closed head trauma and ability of Anatibant mesylate to cross the blood-brain barrier.	2006 May	16689671
The BRAIN TRIAL: a randomised, placebo controlled trial of a Bradykinin B2 receptor antagonist (Anatibant) in patients with traumatic brain injury.	2009 Dec 3	19958521
Inhibition of bradykinin B2 receptors before, not after onset of experimental subarachnoid hemorrhage prevents brain edema formation and improves functional outcome.	2009 Jul	19487935

Showing 1 to 4 of 4 entries

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Patents

Sample Use Guides

In Vivo Use Guide

At 8-12 h after traumatic brain injury (9.9 +/- 2.8 h), patients received a single subcutaneous injection of Anatibant (3.75 mg or 22.5 mg, n = 10 each)

Route of Administration: Other

In Vitro Use Guide

Anatibant (LF 16-0687) bound to the human, rat and guinea-pig recombinant B2 receptor expressed in CHO cells giving K(i) values of 0.67 nM, 1.74 nM and 1.37 nM, respectively. It also bound to the native BK B2 receptor from human umbilical vein (HUV), rat uterus (RU) and guinea-pig ileum (GPI) giving K(i) values of 0.89 nM, 0.28 nM and 0.98 nM, respectively. It inhibited BK-induced IP1, IP2 and IP3 formation in INT407 cells yielding pK(B) values of 8.5, 8.6 and 8.7, respectively. In isolated organs experiments, LF 16-0687 behaved as a competitive antagonist of BK-mediated contractions giving pA2 values of 9.1 in HUV, 7.7 in RU and 9.1 in GPI.