Lys-[Des-Arg9]Bradykinin TFA is a naturally occurring kinin that is a potent and selective bradykinin B1 receptor agonist/activator with Kis for B1 receptors in humans, mice and rabbits. are 0.12 nM, 1.7 nM and 0.23 nM. Lys-[Des-Arg9]Bradykinin TFA has low inhibitory activity on B2 receptors.

Physicochemical Properties

Molecular Formula	C52H74F3N13O13
Molecular Weight	1146.21848249435
Exact Mass	1145.548
CAS #	2763588-90-3
PubChem CID	145707527
Appearance	White to off-white solid powder
Hydrogen Bond Donor Count	12
Hydrogen Bond Acceptor Count	19
Rotatable Bond Count	27
Heavy Atom Count	81
Complexity	2040
Defined Atom Stereocenter Count	8
SMILES	C1C[C@H](N(C1)C(=O)[C@@H]2CCCN2C(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CCCCN)N)C(=O)NCC(=O)N[C@@H](CC3=CC=CC=C3)C(=O)N[C@@H](CO)C(=O)N4CCC[C@H]4C(=O)N[C@@H](CC5=CC=CC=C5)C(=O)O.C(=O)(C(F)(F)F)O
InChi Key	BUNFBEBTCVIRNN-HVJIRRSLSA-N
InChi Code	InChI=1S/C50H73N13O11.C2HF3O2/c51-22-8-7-17-33(52)42(66)58-34(18-9-23-55-50(53)54)46(70)63-26-12-21-40(63)48(72)62-25-10-19-38(62)44(68)56-29-41(65)57-35(27-31-13-3-1-4-14-31)43(67)60-37(30-64)47(71)61-24-11-20-39(61)45(69)59-36(49(73)74)28-32-15-5-2-6-16-32;3-2(4,5)1(6)7/h1-6,13-16,33-40,64H,7-12,17-30,51-52H2,(H,56,68)(H,57,65)(H,58,66)(H,59,69)(H,60,67)(H,73,74)(H4,53,54,55);(H,6,7)/t33-,34-,35-,36-,37-,38-,39-,40-;/m0./s1
Chemical Name	(2S)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[2-[[(2S)-1-[(2S)-1-[(2S)-2-[[(2S)-2,6-diaminohexanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]pyrrolidine-2-carbonyl]pyrrolidine-2-carbonyl]amino]acetyl]amino]-3-phenylpropanoyl]amino]-3-hydroxypropanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanoic acid;2,2,2-trifluoroacetic acid
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture and light.
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

Targets	Bradykinin B1 Receptor (B1R)
ln Vitro	Lys-[Des-Arg9]Bradykinin TFA activates via the bradykinin B1 receptor (B1R) and is produced by proteolytic cleavage of bradykinin [1]. Lys-[Des-Arg9]Bradykinin TFA (Lda-BK; 10 μM) stimulates mature hMo-DCs' release of IL-12p70 while suppressing their secretion of IL-12p40. [1] Lys-[Des-Arg9] bradykinin may block the chemokines of mature hMo-DCs, as pretreatment decreased the migration of mature hMo-DCs to culture medium alone.
ln Vivo	Although the impact is transient (T1/2 is 118-195 seconds), Lys-[Des-Arg9]Bradykinin TFA (1 μg; intra-arterial injection; New Zealand white rabbit) therapy can lessen LPS-induced peripheral vascular resistance in rabbits [3].
References	[1]. Lys-des[Arg9]-bradykinin alters migration and production of interleukin-12 in monocyte-derived dendritic cells. Am J Respir Cell Mol Biol. 2011 Sep;45(3):542-9. [2]. International union of pharmacology. XLV. Classification of the kinin receptor family: from molecular mechanisms to pathophysiological consequences. Pharmacol Rev. 2005 Mar;57(1):27-77. [3]. Hypotensive effects of Lys-des-Arg9-bradykinin and metabolically protected agonists of B1 receptors for kinins. J Pharmacol Exp Ther. 1991 Dec;259(3):997-1003.

Solubility Data

Solubility (In Vitro)

DMSO: 110 mg/mL (95.97 mM) H2O: 50 mg/mL (43.62 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.75 mg/mL (2.40 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 27.5 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.75 mg/mL (2.40 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 27.5 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Solubility in Formulation 3: ≥ 2.75 mg/mL (2.40 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 27.5 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly. Solubility in Formulation 4: 100 mg/mL (87.24 mM) in PBS (add these co-solvents sequentially from left to right, and one by one), clear solution; with ultrasonication.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	0.8724 mL	4.3622 mL	8.7243 mL
	5 mM	0.1745 mL	0.8724 mL	1.7449 mL
	10 mM	0.0872 mL	0.4362 mL	0.8724 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.