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Bombesin

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Bombesin is a neuropeptide with many biological effects such as hormone release, activation of pancreatic enzyme secretion, inhibition of gastric emptying and modulation of gastric acid secretion. It binds to the gastrin-releasing peptide receptor (GRPR) in rat pancreatic acinar cells (Ki = 1.88 nM), and also to frog bombesin receptor subtype 4 (BB4) in CHO cells overexpressing the receptor (Ki = 1.7 nM).

Category
Peptide Inhibitors
Catalog number
BAT-006169
CAS number
31362-50-2
Molecular Formula
C71H110N24O18S
Molecular Weight
1619.85
Bombesin
Size Price Stock Quantity
10 mg $298 In stock
IUPAC Name
(2S)-N-[(2S)-1-[[(2S)-1-[[2-[[(2S)-4-amino-1-[[(2S)-5-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[2-[[(2S)-1-[[(2S)-1-[[(2S)-1-amino-4-methylsulfanyl-1-oxobutan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-(1H-imidazol-5-yl)-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-methyl-1-oxobutan-2-yl]amino]-1-oxopropan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-1,5-dioxopentan-2-yl]amino]-1,4-dioxobutan-2-yl]amino]-2-oxoethyl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]-2-[[(2S)-5-oxopyrrolidine-2-carbonyl]amino]pentanediamide
Synonyms
H-Pyr-Gln-Arg-Leu-Gly-Asn-Gln-Trp-Ala-Val-Gly-His-Leu-Met-NH2; L-pyroglutamyl-L-glutaminyl-L-arginyl-L-leucyl-glycyl-L-asparagyl-L-glutaminyl-L-tryptophyl-L-alanyl-L-valyl-glycyl-L-histidyl-L-leucyl-L-methioninamide; Glp-Gln-Arg-Leu-Gly-Asn-Gln-Trp-Ala-Val-Gly-His-Leu-Met-NH2
Related CAS
33910-70-2 (dihydrochloride)
Appearance
White Lyophilized Powder
Purity
≥95%
Density
1.50±0.1 g/cm3 (Predicted)
Sequence
Glp-QRLGNQWAVGHLM-NH2
Storage
Store at -20°C
Solubility
Soluble in Acetic Acid, Water
InChI
InChI=1S/C71H110N24O18S/c1-34(2)24-47(92-62(105)43(14-11-22-79-71(76)77)89-64(107)45(15-18-52(72)96)90-63(106)44-17-20-55(99)85-44)61(104)81-31-56(100)87-51(28-54(74)98)69(112)91-46(16-19-53(73)97)65(108)94-49(26-38-29-80-41-13-10-9-12-40(38)41)66(109)84-37(7)60(103)95-58(36(5)6)70(113)82-32-57(101)86-50(27-39-30-78-33-83-39)68(111)93-48(25-35(3)4)67(110)88-42(59(75)102)21-23-114-8/h9-10,12-13,29-30,33-37,42-51,58,80H,11,14-28,31-32H2,1-8H3,(H2,72,96)(H2,73,97)(H2,74,98)(H2,75,102)(H,78,83)(H,81,104)(H,82,113)(H,84,109)(H,85,99)(H,86,101)(H,87,100)(H,88,110)(H,89,107)(H,90,106)(H,91,112)(H,92,105)(H,93,111)(H,94,108)(H,95,103)(H4,76,77,79)/t37-,42-,43-,44-,45-,46-,47-,48-,49-,50-,51-,58-/m0/s1
InChI Key
QXZBMSIDSOZZHK-DOPDSADYSA-N
Canonical SMILES
CC(C)CC(C(=O)NCC(=O)NC(CC(=O)N)C(=O)NC(CCC(=O)N)C(=O)NC(CC1=CNC2=CC=CC=C21)C(=O)NC(C)C(=O)NC(C(C)C)C(=O)NCC(=O)NC(CC3=CN=CN3)C(=O)NC(CC(C)C)C(=O)NC(CCSC)C(=O)N)NC(=O)C(CCCNC(=N)N)NC(=O)C(CCC(=O)N)NC(=O)C4CCC(=O)N4
1.Towards the Optimization of Bombesin-Based Radiotracers for Tumor Targeting.
Valverde IE, Vomstein S, Mindt TL. J Med Chem. 2016 Apr 7. [Epub ahead of print]
The peptide bombesin (BBN) is a peptide with high affinity for the Gastrin-Releasing Peptide Receptor (GRPr), a receptor that is overexpressed by, e.g., breast and prostate cancers. Thus, GRPr agonists can be used as cancer-targeting vectors to shuttle diagnostic and therapeutic agents into tumor cells. With the aim of optimizing the tumor targeting properties of a radiolabeled [Nle14]BBN(7-14) moiety, novel BBN(7-14)- and BBN(6-14)-based radioconjugates were synthesized, labeled with Lu-177, and fully evaluated in vitro and in vivo. The effect of residue and backbone modification on several parameters such as the internalization of the radiolabeled peptides into PC3 and AR42J tumor cells, their affinity towards the human GRPr, metabolic stability in blood plasma, and biodistribution in mice bearing GRPr-expressing PC3 xenografts was studied. As a result of our investigations, a novel radiolabeled GRPr agonist with a high tumor uptake and a high tumor-to-kidney ratio was identified.
2.Bombesin-Like Receptor 3: Physiology of a Functional Orphan.
Xiao C1, Reitman ML2. Trends Endocrinol Metab. 2016 Apr 4. pii: S1043-2760(16)00037-0. doi: 10.1016/j.tem.2016.03.003. [Epub ahead of print]
Bombesin-like receptor 3 (BRS-3) is an X-linked orphan Gq-coupled receptor that regulates food intake, metabolic rate, body temperature, heart rate, blood pressure, and insulin secretion. Most BRS-3 actions occur via the brain, through mechanisms including regulating sympathetic outflow. Ablation of Brs3 causes obesity, while synthetic agonists produce weight loss.
3.Neuromedin B and Its Receptor: Gene Cloning, Tissue Distribution and Expression Levels of the Reproductive Axis in Pigs.
Ma Z1, Su J1, Guo T1, Jin M1, Li X1, Lei Z1, Hou Y1, Li X1, Jia C1, Zhang Z1, Ahmed E1. PLoS One. 2016 Mar 24;11(3):e0151871. doi: 10.1371/journal.pone.0151871. eCollection 2016.
Neuromedin B is one member of a family of bombesin-like peptides, which performs a variety of physiological functions via their receptor (NMBR) in most mammals. However, the genes encoding NMB and NMBR and their functions especially reproduction of the pigs are currently not fully understood. To research the physiological functions of NMB, we cloned and analyzed the NMB and NMBR genes, and systematically investigated the expression levels of NMB and NMBR mRNA using relative real-time PCR and the distribution of NMBR by immunohistochemistry (IHC). Experimental results show that the sequences of the amino acid and gene of NMB and NMBR were highly conservative and homology in many species, Significantly, the relative RT-PCR results revealed that NMB was mainly expressed in the central nervous system (CNS), whereas NMBR is highly expressed in peripheral tissues and organs, such as endocrine tissues, glands and reproductive organs. The IHC results show that NMBR positive cells were widely distributed in the body, such as respiratory and circulatory system, digestive system, urogenital system, in lymphatic organs and in the endocrine system.
4.Interrogating the Role of Receptor-Mediated Mechanisms: Biological Fate of Peptide-Functionalized Radiolabeled Gold Nanoparticles in Tumor Mice.
Silva F1, Zambre A, Campello MP1, Gano L1, Santos I1, Ferraria AM2, Ferreira MJ3, Singh A, Upendran A, Paulo A1, Kannan R. Bioconjug Chem. 2016 Apr 7. [Epub ahead of print]
To get a better insight on the transport mechanism of peptide-conjugated nanoparticles to tumors, we performed in vivo biological studies of bombesin (BBN) peptide functionalized gold nanoparticles (AuNPs) in human prostate tumor bearing mice. Initially, we sought to compare AuNPs with thiol derivatives of acyclic and macrocyclic chelators of DTPA and DOTA types. The DTPA derivatives were unable to provide a stable coordination of 67Ga, and therefore, the functionalization with the BBN analogues was pursued for the DOTA-containing AuNPs. The DOTA-coated AuNPs were functionalized with BBN[7-14] using a unidentate cysteine group or a bidentate thioctic group to attach the peptide. AuNPs functionalized with thioctic-BBN displayed the highest in vitro cellular internalization (≈ 25%, 15 min) in gastrin releasing peptide (GRP) receptor expressing cancer cells. However, these results fail to translate to in vivo tumor uptake. Biodistribution studies following intravenous (IV) and intraperitoneal (IP) administration of nanoconjugates in tumor bearing mice indicated that the presence of BBN influences to some degree the biological profile of the nanoconstructs.
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