Kuwanon G is a flavonoid isolated from Morus alba, acts as a bombesin receptor antagonist, with potential antimicrobial activity[1][2].
[D-Arg1,D-Phe5,D-Trp7,9,Leu11]-Substance P, a Substance P derivative, is a biased agonist toward neuropeptide and chemokine receptors. [D-Arg1,D-Phe5,D-Trp7,9,Leu11]-Substance P activates G12. [D-Arg1,D-Phe5,D-Trp7,9,Leu11]-Substance P binds to IL-8 and GRP receptors. [D-Arg1,D-Phe5,D-Trp7,9,Leu11]-Substance P inhibits ERK-2 activation, activates JNK activity. [D-Arg1,D-Phe5,D-Trp7,9,Leu11]-Substance P stimulates an increase in neutrophil migration and Ca2+ mobilization. [D-Arg1,D-Phe5,D-Trp7,9,Leu11]-Substance P is also a bombesin antagonist, and inhibits the growth of small cell lung cancer[1][2][3]
GB-6 is a short linear peptide that targets the gastrin releasing peptide receptor (GRPR). GRPR is overexpressed in pancreatic cancer. Based on the tumor selectivity and tumor-specific accumulation properties of GB-6, GB-6 labeled with near infrared (NIR) fluorescent dyes or radionuclide netium-99m (99mTc) can be used as a high-contrast imaging probe. GB-6 has excellent in vivo stability, with tumor to pancreatic and intestinal fluorescence signal ratios of 5.2 and 6.3, respectively, in SW199 0 subcutaneous xenograft models. GB-6 can rapidly target tumors and accurately delineate tumor boundaries, which has broad application prospects[1].
Bombesin is a tetradecapeptide originally isolated from frog skin; plays an important role in the release of gastrin and the activation of G-protein receptors.
ML-18 is a non-peptide bombesin receptor subtype-3 (BRS-3) antagonist with an IC50 of 4.8 μM.
RC-3095 TFA is a bombesin/gastrin releasing peptide receptor antagonist[1].
[Tyr4]-Bombesin is a Bombesin analogue, is a ligand of gastrin-releasing peptide receptor (GRPR)[1].
RC-3095 is a bombesin/gastrin releasing peptide receptor antagonist[1].
(D-Phe6,Leu-NHEt13,des-Met14)-Bombesin (6-14) is a bombesin (BBN) antagonist and can be used for the research of cancer[1].
PD176252 is a potent antagonist of neuromedin-B preferring (BB1) and gastrin-releasing peptide-preferring (BB2) receptor with Kis of 0.17 nM and 1 nM for human BB1 and BB2 receptors, and 0.66 nM, 16 nM for Rat BB1 and BB2 receptors, respectively; PD176252 is also an agonist of N-Formyl peptide receptor1/2 (FPR1/FPR2), with EC50s of 0.31 and 0.66 μM in HL-60 cells.
RC-3095 acetate is a bombesin/gastrin releasing peptide receptor (GRPR) antagonist[1]. RC-3095 acetate exerts protective effects by reducing gastric oxidative injury in the arthritic mice[2].
BRS-3 receptor agonist-2 (compound 2) is a potent BRS-3 receptor agonist, with an EC50 of 2.5 nM for mouse BRS-3 receptor[1].
BIM 23042, a certain somatostatin (SS) octapeptide analogue, is a selective neuropeptide neuromedin B receptor (NMB-R, BB1) antagonist. BIM 23042 has 100-fold lower affinity for gastrin-releasing peptide (GRP) receptor (BB2). BIM 23042 inhibits Neuromedin B (HY-P0241), ICI 216140 and DPDM-bombesin ethylamide-induced Ca2+ release[1][2][3].
BIM-26226, gastrin-releasing peptide, is a potent and selective antagonist of bombesin receptor. BIM-26226 inhibits BN- or GRP-stimulated amylase release with IC50s in the nanomolar range. BIM-26226 can be used for the research of cancer[1][2].
[D-Phe12,Leu14]-Bombesin is an antagonist of Bombesin Receptor. [D-Phe12,Leu14]-Bombesin can be used for the research of cancer[1].
Litorin, an amphibian bombesin peptide derivative, is an bombesin receptor agonist. Litorin stimulates the contraction of smooth muscle, stimulates gastrin, gastric acid, and pancreatic secretion, and suppresses the nutriment in vivo[1][2].
Ranatensin is a undecapeptide and a Bombesin Receptor angonist, can be isolated from amphibian skin, such as the frog, Rana pipiens. Ranatensin could maintain the dynamic balance of animal blood pressure, without cross-tachyphylaxis with Angiotensin amide (HY-P2212), Bradykinin (HY-P0206), or Norepinephrine (HY-13715)[1][2].
PD 168368 is a potent, competitive, and selective neuromedin B receptor (NMB-R) antagonist with the Ki of 15–45 nM[1]. PD 168368 is neuromedin B receptor (NMBR; IC50=96 nM) / gastrin-releasing peptide receptor (GRPR IC50=3500 nM) antagonist[2]. PD 168368 also is a mixed FPR1/FPR2/FPR3 agonist with EC50s of 0.57, 0.24, and 2.7 nM, respectively[3].
DSO-5a is a potent, selective, orally active BB3 agonist. DSO-5a is a representative DMAKO-00 derivative compound. DSO-5a upregulates ppar-γ activity through BB3 and activates ERK1/2 phosphorylation. DSO-5a can be used in diabetes-related research[1].
GRP (14-27) (human, porcine, canine) is a bombesin receptor ligand. The specific binding of GRP (14-27) is inhibited by GTP and GDP, whereas GMP was without effect[1].
BA 1 is a potent bombesin receptor agonist (IC50 values are 0.26, 1.55 and 2.52 nM for BB1, BB2 and BB3 respectively). BA 1 enhances glucose transport in obese and diabetic primary myocytes. BA 1 also stimulates NCI-H1299 lung cancer cell proliferation in vitro.
MK-5046 is a novel BRS-3 agonist, binds to BRS-3 with high affinity (mouse Ki = 1.6 nM, human Ki = 25 nM).IC50 value: 1.6 nM (Ki, for mouse), 25 nM (Ki, for human) [1]Target: BRS-3in vitro: MK-5046 is a novel BRS-3 agonist, with improved BRS-3 potency, specificity, and pharmacokinetic properties that allows in-depth investigation of BRS3 agonism in preclinical species and is also potentially suitable for use in humans. MK-5046 exhibits no appreciable binding activity at the neuromedin B and gastrin-releasing peptide receptors, as well as many other receptors, ion channels, and enzymes. In a cell-based Ca2+ mobilization functional assay, MK-5046 activates human BRS-3 with similar agonist efficacy as the peptide BRS-3 agonist.[1] MK-5046 is a potent, selective bombesin receptor subtype-3 agonist for the treatment of obesity.[2]in vivo: MK-5046 is the first BRS-3 agonist with properties suitable for use in larger mammals. In dogs, MK-5046 treatment produced statistically significant and persistent weight loss, which was initially accompanied by increases in body temperature and heart rate that abated with continued dosing. MK-5046 also effectively reduced body weight in rats and caused modest increases in body temperature, heart rate, and blood pressure. MK-5046 in rodents and dogs and further support BRS-3 agonism as a new approach to the treatment of obesity.[1]
Kuwanon H is a flavonoid isolated from Morus bombycis, which acts as a potent non-peptide bombesin receptor antagonist. Kuwanon H selectively inhibits binding of gastrin releasing peptide CRP to GRP-preferring recepotr, with a Ki value of 290 nM in cells[1].