| Size | Price | Stock | Qty |
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| 5mg |
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| 10mg |
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| Other Sizes |
| Targets |
Proadrenomedullin (1-20) acts specifically at the nicotinic cholinergic receptor in a noncompetitive manner. The peptide inhibits catecholamine secretion from chromaffin cells by blocking nicotinic receptor-mediated catecholamine release. It does not act through adrenomedullin receptors but through a distinct mechanism involving nicotinic acetylcholine receptors.
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|---|---|
| ln Vitro |
Proadrenomedullin (1-20) inhibits catecholamine secretion in PC12 pheochromocytoma cells with an IC50 of approximately 350 nM. The peptide acts in a noncompetitive manner specifically at the nicotinic cholinergic receptor. It is a potent inhibitor of catecholamine release from chromaffin cells, demonstrating effectiveness in the low micromolar range.
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| ln Vivo |
Proadrenomedullin (1-20) is a potent anti-hypertensive peptide that lowers blood pressure in vivo. It inhibits catecholamine release, contributing to its hypotensive effects. The peptide is released from chromaffin cells and plays a role in the regulation of blood pressure and catecholamine homeostasis.
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| Enzyme Assay |
For receptor binding assays, PC12 cell membranes or cells expressing nicotinic cholinergic receptors are incubated with radiolabeled nicotinic ligands (e.g., [³H]-epibatidine) and varying concentrations of Proadrenomedullin (1-20). Specific binding is determined, and IC50 values are calculated from competition curves.
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| Cell Assay |
Cellular assays are performed using PC12 pheochromocytoma cells. Cells are pre-incubated with Proadrenomedullin (1-20) at various concentrations (typically around 350 nM) and then stimulated with nicotinic agonists. Catecholamine secretion (epinephrine and norepinephrine) is measured by HPLC with electrochemical detection or by ELISA. The inhibition of catecholamine release is calculated as a percentage of control.
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| Animal Protocol |
In vivo, Proadrenomedullin (1-20) is administered intravenously to evaluate its hypotensive effects. Blood pressure is monitored via arterial cannulation. Catecholamine levels in plasma are measured by HPLC. The peptide's effects on cardiovascular function and catecholamine release are assessed in normotensive and hypertensive animal models.
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| ADME/Pharmacokinetics |
As a 20-amino acid peptide with a molecular weight of 2460.84, Proadrenomedullin (1-20) has a short half-life in circulation due to rapid proteolytic degradation. It is administered parenterally (intravenously) for in vivo studies. The peptide is soluble in water and buffered aqueous solutions. Tissue distribution is limited due to its peptide nature and rapid clearance.
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| Toxicity/Toxicokinetics |
Proadrenomedullin (1-20) is generally well-tolerated at effective doses in animal studies. As an endogenous peptide, it has a physiological role in blood pressure regulation and catecholamine homeostasis. No significant toxicity has been reported at pharmacological doses.
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| References |
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| Additional Infomation |
Proadrenomedullin (1-20) is a potent anti-hypertensive and catecholamine release-inhibitory peptide that corresponds to the N-terminal 20 amino acids of proadrenomedullin. It acts noncompetitively at the nicotinic cholinergic receptor with an IC50 of ~350 nM for catecholamine secretion in PC12 cells.
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| Molecular Formula |
C112H178N36O27
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|---|---|
| Molecular Weight |
2460.8367
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| Exact Mass |
2459.37
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| CAS # |
150238-87-2
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| PubChem CID |
71311703
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| Sequence |
Ala-Arg-Leu-Asp-Val-Ala-Ser-Glu-Phe-Arg-Lys-Lys-Trp-Asn-Lys-Trp-Ala-Leu-Ser-Arg-NH2ARLDVASEFRKKWNKWALSR-NH2
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| SequenceShortening |
ARLDVASEFRKKWNKWALSR-NH2
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| Appearance |
White to off-white solid powder
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| Density |
1.47±0.1 g/cm3
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| LogP |
6.086
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| Hydrogen Bond Donor Count |
40
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| Hydrogen Bond Acceptor Count |
34
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| Rotatable Bond Count |
86
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| Heavy Atom Count |
175
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| Complexity |
5380
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| Defined Atom Stereocenter Count |
20
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| SMILES |
O=C([C@]([H])(C([H])([H])C([H])([H])C([H])([H])C([H])([H])N([H])[H])N([H])C([C@]([H])(C([H])([H])C([H])([H])C([H])([H])N([H])/C(=N/[H])/N([H])[H])N([H])C([C@]([H])(C([H])([H])C1C([H])=C([H])C([H])=C([H])C=1[H])N([H])C([C@]([H])(C([H])([H])C([H])([H])C(=O)O[H])N([H])C([C@]([H])(C([H])([H])O[H])N([H])C([C@]([H])(C([H])([H])[H])N([H])C([C@]([H])(C([H])(C([H])([H])[H])C([H])([H])[H])N([H])C([C@]([H])(C([H])([H])C(=O)O[H])N([H])C([C@]([H])(C([H])([H])C([H])(C([H])([H])[H])C([H])([H])[H])N([H])C([C@]([H])(C([H])([H])C([H])([H])C([H])([H])N([H])/C(=N/[H])/N([H])[H])N([H])C([C@]([H])(C([H])([H])[H])N([H])[H])=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)N([H])[C@]([H])(C(N([H])[C@]([H])(C(N([H])[C@@]([H])(C([H])([H])C(N([H])[H])=O)C(N([H])[C@]([H])(C(N([H])[C@]([H])(C(N([H])[C@@]([H])(C([H])([H])[H])C(N([H])[C@]([H])(C(N([H])[C@@]([H])(C([H])([H])O[H])C(N([H])[C@]([H])(C(N([H])[H])=O)C([H])([H])C([H])([H])C([H])([H])N([H])/C(=N/[H])/N([H])[H])=O)=O)C([H])([H])C([H])(C([H])([H])[H])C([H])([H])[H])=O)=O)C([H])([H])C1=C([H])N([H])C2=C([H])C([H])=C([H])C([H])=C12)=O)C([H])([H])C([H])([H])C([H])([H])C([H])([H])N([H])[H])=O)=O)C([H])([H])C1=C([H])N([H])C2=C([H])C([H])=C([H])C([H])=C12)=O)C([H])([H])C([H])([H])C([H])([H])C([H])([H])N([H])[H]
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| InChi Key |
PIRWNASAJNPKHT-SHZATDIYSA-N
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| InChi Code |
InChI=1S/C112H178N36O27/c1-57(2)46-77(102(168)147-85(56-150)107(173)132-70(90(118)156)35-23-43-125-110(119)120)139-92(158)61(8)130-100(166)80(49-64-53-128-68-30-15-13-28-66(64)68)142-97(163)73(34-19-22-42-115)136-105(171)82(51-86(117)151)144-104(170)81(50-65-54-129-69-31-16-14-29-67(65)69)143-96(162)72(33-18-21-41-114)135-94(160)71(32-17-20-40-113)134-95(161)75(37-25-45-127-112(123)124)137-103(169)79(48-63-26-11-10-12-27-63)141-99(165)76(38-39-87(152)153)138-108(174)84(55-149)146-93(159)62(9)131-109(175)89(59(5)6)148-106(172)83(52-88(154)155)145-101(167)78(47-58(3)4)140-98(164)74(133-91(157)60(7)116)36-24-44-126-111(121)122/h10-16,26-31,53-54,57-62,70-85,89,128-129,149-150H,17-25,32-52,55-56,113-116H2,1-9H3,(H2,117,151)(H2,118,156)(H,130,166)(H,131,175)(H,132,173)(H,133,157)(H,134,161)(H,135,160)(H,136,171)(H,137,169)(H,138,174)(H,139,158)(H,140,164)(H,141,165)(H,142,163)(H,143,162)(H,144,170)(H,145,167)(H,146,159)(H,147,168)(H,148,172)(H,152,153)(H,154,155)(H4,119,120,125)(H4,121,122,126)(H4,123,124,127)/t60-,61-,62-,70-,71-,72-,73-,74-,75-,76-,77-,78-,79-,80-,81-,82-,83-,84-,85-,89-/m0/s1
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| Chemical Name |
(4S)-5-[[(2S)-1-[[(2S)-1-[[(2S)-6-amino-1-[[(2S)-6-amino-1-[[(2S)-1-[[(2S)-4-amino-1-[[(2S)-6-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-amino-5-carbamimidamido-1-oxopentan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1-oxopropan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-1-oxohexan-2-yl]amino]-1,4-dioxobutan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-1-oxohexan-2-yl]amino]-1-oxohexan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-4-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-aminopropanoyl]amino]-5-carbamimidamidopentanoyl]amino]-4-methylpentanoyl]amino]-3-carboxypropanoyl]amino]-3-methylbutanoyl]amino]propanoyl]amino]-3-hydroxypropanoyl]amino]-5-oxopentanoic acid
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| HS Tariff Code |
2934.99.9001
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| 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)
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| Solubility (In Vitro) |
DMSO: ~100 mg/mL (~40.6 mM; with ultrasonication)
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|---|---|
| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.5 mg/mL (1.02 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween-80 + 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 DMSO stock solution (25.0 mg/mL) to 400 μL of PEG300 and mix well; then add 50 μL of Tween-80 and mix well; finally add 450 μL of physiological saline and 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: ≥ 2.5 mg/mL (1.02 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 DMSO stock solution (25.0 mg/mL) to 900 μL of 20% SBE-β-CD saline and mix well. 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: ≥ 2.5 mg/mL (1.02 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 DMSO stock solution (25.0 mg/mL) to 900 μL of corn oil and mix well. (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 0.4064 mL | 2.0318 mL | 4.0637 mL | |
| 5 mM | 0.0813 mL | 0.4064 mL | 0.8127 mL | |
| 10 mM | 0.0406 mL | 0.2032 mL | 0.4064 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.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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