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Oka Y, Abe-Sato K, Tabuse H, Yasukawa Y, Yahara T, Nishimoto T, Kamitani M, Fukunaga T, Ochiai N, Kumasaka-Abe T, Hitaka K, Gunji E, Ohara H, Takeda T, Kojima N, Asami T. Discovery of TP0628103: A Highly Potent and Selective MMP-7 Inhibitor with Reduced OATP-Mediated Clearance Designed by Shifting Isoelectric Points. J Med Chem 2024; 67:1406-1420. [PMID: 38214909 DOI: 10.1021/acs.jmedchem.3c01967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Matrix metalloproteinase-7 (MMP-7) has been shown to play an important role in pathophysiological processes such as cancer and fibrosis. We previously discovered selective MMP-7 inhibitors by molecular hybridization and structure-based drug design. However, the systemic clearance (CLtot) of the biologically active lead compound was very high. Because our studies revealed that hepatic uptake by organic anion transporting polypeptide (OATP) was responsible for the high CLtot, we found a novel approach to reducing their uptake based on isoelectric point (IP) values as an indicator for substrate recognition by OATP1B1/1B3. Our "IP shift strategy" to adjust the IP values culminated in the discovery of TP0628103 (18), which is characterized by reduced in vitro OATP-mediated hepatic uptake and in vivo CLtot. Our in vitro-in vivo extrapolation of OATP-mediated clearance and the "IP shift strategy" provide crucial insights for a new medicinal chemistry approach to reducing the systemic clearance of OATP1B1/1B3 substrates.
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Nishikawa-Shimono R, Kuwabara M, Fujisaki S, Matsuda D, Endo M, Kamitani M, Futamura A, Nomura Y, Yamaguchi-Sasaki T, Yabuuchi T, Yamaguchi C, Tanaka-Yamamoto N, Satake S, Abe-Sato K, Funayama K, Sakata M, Takahashi S, Hirano K, Fukunaga T, Uozumi Y, Kato S, Tamura Y, Nakamori T, Mima M, Mishima-Tsumagari C, Nozawa D, Imai Y, Asami T. Discovery of novel indole derivatives as potent and selective inhibitors of proMMP-9 activation. Bioorg Med Chem Lett 2024; 97:129541. [PMID: 37952596 DOI: 10.1016/j.bmcl.2023.129541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/18/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
Matrix metalloproteinase-9 (MMP-9) is a secreted zinc-dependent endopeptidase that degrades the extracellular matrix and basement membrane of neurons, and then contributes to synaptic plasticity by remodeling the extracellular matrix. Inhibition of MMP-9 activity has therapeutic potential for neurodegenerative diseases such as fragile X syndrome. This paper reports the molecular design, synthesis, and in vitro studies of novel indole derivatives as inhibitors of proMMP-9 activation. High-throughput screening (HTS) of our internal compound library and subsequent merging of hit compounds 1 and 2 provided compound 4 as a bona-fide lead. X-ray structure-based design and subsequent lead optimization led to the discovery of compound 33, a highly potent and selective inhibitor of proMMP-9 activation.
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Abe K, Chiba Y, Ide K, Yoshimi A, Asami T, Suda A, Odawara T, Hishimoto A. Plasma MMP-9 Levels as the Future Risk of Conversion to Dementia in ApoE4-Positive MCI Patients: Investigation Based on the Alzheimer's Disease Neuroimaging Initiative Database. J Prev Alzheimers Dis 2022; 9:331-337. [PMID: 35543007 DOI: 10.14283/jpad.2022.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
BACKGROUND Matrix metalloproteinase 9 (MMP-9) has been reported to be correlated with declines in hippocampal volume and cognitive function in ApoE4-positive MCI patients. OBJECTIVES The present study was aimed to investigate the effects of plasma matrix MMP-9 on the conversion risk between mild cognitive impairment (MCI) patients with and without ApoE4. DESIGN AND SETTING Retrospective observational study using the data extracted from the Alzheimer's Disease Neuroimaging Initiative database. PARTICIPANTS We included 211 ApoE4-positive MCI subjects (ApoE4+ MCI) and 184 ApoE4-negative MCI subjects (ApoE4- MCI). MEASUREMENTS We obtained demographic and data including plasma MMP-9 levels at baseline and longitudinal changes in Clinical Dementia Rating (CDR) up to 15 years. We compared conversion rates between ApoE4+ MCI and ApoE4- MCI by the Log-rank test and calculated the hazard ratio (HR) for covariates including age, sex, educational attainment, drinking and smoking histories, medications, and plasma MMP-9 levels using a multiple Cox regression analysis of ApoE4+ MCI and ApoE4- MCI. RESULTS No significant differences were observed in baseline plasma MMP-9 levels between ApoE4+ MCI and ApoE4- MCI. High plasma MMP-9 levels increased the conversion risk significantly more than low plasma MMP-9 levels (HR, 2.46 [95% CI, 1.31-4.48]) and middle plasma MMP-9 levels (HR, 1.67 [95% CI, 1.04-2.65]) in ApoE4+ MCI, but not in ApoE4- MCI. CONCLUSION Plasma MMP-9 would be the risk of the future conversion to dementia in ApoE4+ MCI.
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Kuzume K, Koizumi M, Kagata Y, Nishimura K, Kuwabara Y, Okamoto M, Asami T, Murakami Y, Yagi Y, Midoro-Horiuti T. A056 HOW TO DRINK MILK - ASSESSMENT OF AN INTERMITTENT ORAL IMMUNOTHERAPY FOR SEVERE MILK ALLERGY. Ann Allergy Asthma Immunol 2021. [DOI: 10.1016/j.anai.2021.08.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kawai T, Mihara Y, Morita M, Ohkubo M, Asami T, Watanabe TM. Quantitation of Cell Membrane Permeability of Cyclic Peptides by Single-Cell Cytoplasm Mass Spectrometry. Anal Chem 2021; 93:3370-3377. [PMID: 33550808 DOI: 10.1021/acs.analchem.0c03901] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cyclic peptides (CPs) have attracted attention as next-generation drugs because they possess both cell-permeable potential as small molecules and specific affinity similar to antibodies. As intracellular molecules are important targets of CPs, quantitation of the intracellular retention and transmembrane permeability of CPs is necessary for drug development. However, permeated CPs within cells cannot be directly assessed by conventional permeability assays using methods such as artificial membranes and cell monolayers. Here, we propose a new approach using single-cell cytoplasm mass spectrometry (SCC-MS). After cells were incubated with CPs, the cytoplasm was directly collected from a single cell using a microneedle followed by nanoelectrospray ionization mass spectrometry detection of the CPs. The height of the CP peak was plotted against time and fitted with a simple function, y = a(1 - e-bx), to calculate the apparent permeability coefficient (Papp) for both the influx and efflux directions. MCF-7 cells were selected as model cancer cells and cultured with cyclosporin A (CsA) and its demethylated analogs (dmCsA-1, -2, and -3) as model CPs. Papp values (10-6 cm/s) obtained from cells incubated with 50 μM CPs ranged from 0.017 to 0.121 for influx and 0.20 to 1.48 for efflux. The higher efflux ratio was possibly caused by efflux transporters such as P-glycoprotein, a well-known receptor of CsA. The equilibrated intracellular concentration of CPs was estimated to be as low as 4.1-6.8 μM, which showed good consistency with the high efflux ratio. SCC-MS is promising as a reliable permeability assay for next-generation CP-based pharmaceuticals.
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Nagai H, Kaisho T, Yokoyama K, Asakawa T, Fujita H, Matsumiya K, Noguchi J, Tsuchimori K, Nishizawa N, Kanematsu-Yamaki Y, Dote K, Inooka H, Sakamoto JI, Ohtaki T, Asami T, Takekawa S. Differential effects of selective agonists of neuromedin U1 and U2 receptors in obese and diabetic mice. Br J Pharmacol 2017; 175:359-373. [PMID: 29057457 DOI: 10.1111/bph.14077] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 10/13/2017] [Accepted: 10/15/2017] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND AND PURPOSE Neuromedin U (NmU) may be a novel target for obesity treatment owing to its anorectic and energy expenditure enhancing effects. Although two receptors, NMU1 and NMU2, are both responsible for the NmU-mediated anti-obesity effects, the receptor agonist with the most appropriate profiles for treating obesity and diabetes in terms of efficacy and safety is as yet unknown. Thus, we developed and evaluated novel NMU1/2 receptor-selective agonists. EXPERIMENTAL APPROACH Efficacy and safety were assessed in mice with diet-induced obesity (DIO) and those with leptin-deficient diabetes (ob/ob) through repeated peripheral administration of selective agonists to NMU1 (NMU-6102) and NMU2 (NMU-2084), along with non-selective NMU1/2 agonists (NMU-0002 and NMU-6014). We also performed immunohistochemistry for c-Fos protein expression in the brain to probe their mechanisms of action. KEY RESULTS Although both non-selective NMU1/2 agonists and the NMU2-selective agonist had high efficacy compared with the NMU1-selective agonist, only the NMU2-selective agonist led to relatively low adverse effects, such as diarrhoea, in DIO mice. However, the non-selective NMU1/2 agonist and the NMU1-selective agonist, but not the NMU2-selective agonist, were effective in diabetic ob/ob mice. Mechanistically, NMU2-selective agonists preferentially activate pro-opiomelanocortin neurons in the hypothalamic arcuate nucleus but not in the paraventricular nucleus. CONCLUSIONS AND IMPLICATIONS These results suggest that an NMU2 receptor-selective agonist may be a well-balanced drug for the treatment of obesity and that an NMU1 receptor-selective agonist may also be beneficial for treating obesity and diabetes once its side effects are minimized.
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Niida A, Kanematsu-Yamaki Y, Asakawa T, Ishimura Y, Fujita H, Matsumiya K, Nishizawa N, Adachi Y, Mochida T, Tsuchimori K, Yoneyama-Hirozane M, Sakamoto J, Hirabayashi H, Fukui H, Takekawa S, Asami T. Antiobesity and emetic effects of a short-length peptide YY analog and its PEGylated and alkylated derivatives. Bioorg Med Chem 2017; 26:566-572. [PMID: 29279243 DOI: 10.1016/j.bmc.2017.12.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 12/06/2017] [Accepted: 12/07/2017] [Indexed: 11/18/2022]
Abstract
Neuropeptide Y2 receptor (Y2R) agonism is an important anorectic signal and a target of antiobesity drug discovery. Recently, we synthesized a short-length Y2R agonist, PYY-1119 (4-imidazolecarbonyl-[d-Hyp24,Iva25,Pya(4)26,Cha27,36,γMeLeu28,Lys30,Aib31]PYY(23-36), 1) as an antiobesity drug candidate. Compound 1 induced marked body weight loss in diet-induced obese (DIO) mice; however, 1 also induced severe vomiting in dogs at a lower dose than the minimum effective dose administered to DIO mice. The rapid absorption of 1 after subcutaneous administration caused the severe vomiting. Polyethylene glycol (PEG)- and alkyl-modified derivatives of 1 were synthesized to develop Y2R agonists with improved pharmacokinetic profiles, i.e., lower maximum plasma concentration (Cmax) and longer time at maximum concentration (Tmax). Compounds 5 and 10, modified with 20 kDa PEG at the N-terminus and eicosanedioic acid at the Lys30 side chain of 1, respectively, showed high Y2R binding affinity and induced significant body weight reduction upon once-daily administration to DIO mice. Compounds 5 and 10, with their relatively low Cmax and long Tmax, partially attenuated emesis in dogs compared with 1. These results indicate that optimization of pharmacokinetic properties of Y2R agonists is an effective strategy to alleviate emesis induced by Y2R agonism.
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Kuzume K, Koizumi M, Okamoto M, Nishimura K, Asami T. P329 Utility and safety of the intermittent oral immunotherapy, step-up method, for severe food allergy patients. Ann Allergy Asthma Immunol 2017. [DOI: 10.1016/j.anai.2017.08.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nishizawa N, Niida A, Adachi Y, Kanematsu-Yamaki Y, Masuda Y, Kumano S, Yokoyama K, Noguchi Y, Asakawa T, Hirabayashi H, Amano N, Takekawa S, Ohtaki T, Asami T. Highly potent antiobesity effect of a short-length peptide YY analog in mice. Bioorg Med Chem 2017; 25:5718-5725. [DOI: 10.1016/j.bmc.2017.08.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 08/26/2017] [Accepted: 08/27/2017] [Indexed: 01/07/2023]
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Nishizawa N, Kanematsu-Yamaki Y, Funata M, Nagai H, Shimizu A, Fujita H, Sakamoto J, Takekawa S, Asami T. A potent neuromedin U receptor 2-selective alkylated peptide. Bioorg Med Chem Lett 2017; 27:4626-4629. [DOI: 10.1016/j.bmcl.2017.09.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Revised: 09/04/2017] [Accepted: 09/08/2017] [Indexed: 12/16/2022]
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Sakamoto K, Shinohara T, Adachi Y, Asami T, Ohtaki T. A novel LRP1-binding peptide L57 that crosses the blood brain barrier. Biochem Biophys Rep 2017; 12:135-139. [PMID: 29090274 PMCID: PMC5645116 DOI: 10.1016/j.bbrep.2017.07.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 05/26/2017] [Accepted: 07/03/2017] [Indexed: 12/22/2022] Open
Abstract
The blood-brain barrier (BBB) is a major obstacle to drug delivery into the central nervous system (CNS), in particular for macromolecules such as peptides and proteins. However, certain macromolecules can reach the CNS via a receptor-mediated transcytosis (RMT) pathway, and low-density lipoprotein receptor-related protein 1 (LRP1) is one of the promising receptors for RMT. An LRP1 ligand peptide, Angiopep-2, was reported to pass through the BBB and deliver covalently conjugated drugs into the CNS. While conjugation of LRP1 ligands with drugs would be an effective approach for drug delivery to the CNS, no other reliable LRP1 ligands have been reported to date. In this study, we aimed to identify novel LRP1 ligands to further investigate LRP1-mediated RMT. Using phage display technology, we obtained a novel peptide, L57 (TWPKHFDKHTFYSILKLGKH-OH), with an EC50 value of 45 nM for binding to cluster 4 (Ser3332–Asp3779) of LRP1. L57 was stable in mouse plasma for up to 20 min. In situ brain perfusion assay in mice revealed the significantly high BBB permeability of L57. In conclusion, we discovered L57, the first artificial LRP1-binding peptide with BBB permeability. Our findings will contribute to the development of RMT-based drugs for the treatment of CNS diseases. The first artificial LRP1-binding peptide L57 was discovered by phage display. L57 binds the extracellular domain of LRP1 with an EC50 binding value of 24 nM. L57 exhibits brain uptake in in situ brain perfusion and i.v. injection in mice.
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Kanematsu-Yamaki Y, Nishizawa N, Kaisho T, Nagai H, Mochida T, Asakawa T, Inooka H, Dote K, Fujita H, Matsumiya K, Hirabayashi H, Sakamoto J, Ohtaki T, Takekawa S, Asami T. Potent Body Weight-Lowering Effect of a Neuromedin U Receptor 2-selective PEGylated Peptide. J Med Chem 2017; 60:6089-6097. [DOI: 10.1021/acs.jmedchem.7b00330] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Nishizawa N, Niida A, Adachi Y, Masuda Y, Kumano S, Yokoyama K, Asakawa T, Hirabayashi H, Amano N, Takekawa S, Ohtaki T, Asami T. Potent antiobesity effect of a short-length peptide YY-analogue continuously administered in mice. Bioorg Med Chem Lett 2017; 27:3829-3832. [PMID: 28684122 DOI: 10.1016/j.bmcl.2017.06.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 06/18/2017] [Accepted: 06/21/2017] [Indexed: 11/25/2022]
Abstract
The gastrointestinal peptide, peptide YY3-36 (PYY3-36) and its shorter peptide analogues have been reported to reduce appetite by activating the neuropeptide Y2 receptor (Y2R), which is associated with obesity and other metabolic diseases. A 14-amino acid PYY analogue, Ac-[d-Pro24,Cha27,28,36,Aib31]PYY(23-36) (3), showed high binding affinity and agonist activity for the Y2R, similar to that of PYY3-36, but had weak anorectic activity upon continuous administration in lean mice. Three amino acid substitutions [Pya(4)26, Aib28, Lys30], which contributed to the decreased hydrophobicity of 3, efficiently increased its anorectic activity. The compound containing these three amino acids, Ac-[d-Pro24,Pya(4)26,Cha27,36,Aib28,31,Lys30]PYY(23-36) (22), exerted more potent and durable food intake suppression than that by PYY3-36 in lean mice, as well as excellent Y2R agonist activity (EC50: 0.20nM) and good subcutaneous bioavailability (66.6%). The 11-day continuous administration of 22 at 1mg/kg/day successfully produced antiobese and antidiabetic effects, with more than 20% body weight loss in obese and Type 2 diabetes ob/ob model mice.
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Sakamoto K, Kanematsu-Yamaki Y, Kamada Y, Oka M, Ohnishi T, Miwa M, Asami T, Inooka H. Identification of ligand-selective peptidic ActRIIB-antagonists using phage display technology. Biochem Biophys Rep 2017; 11:33-39. [PMID: 28955765 PMCID: PMC5614685 DOI: 10.1016/j.bbrep.2017.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 05/18/2017] [Accepted: 06/07/2017] [Indexed: 01/02/2023] Open
Abstract
ActRIIB (activin receptor type-2B) is an activin receptor subtype constitutively expressed in the whole body, playing a role in cellular proliferation, differentiation, and metabolism. For its various physiological activities, ActRIIB interacts with activin and multiple other ligands including myostatin (MSTN), growth differentiation factor 11 (GDF11), and bone morphogenetic protein 9 (BMP9). Notably, the protein-protein interaction (PPI) between ActRIIB and MSTN negatively controls muscular development. Therefore, this PPI has been targeted for effective treatment of muscle degenerative diseases such as muscular dystrophy and sarcopenia. Here, we report the identification of ligand-selective peptidic ActRIIB-antagonists by phage display technology. Our peptides bound to the extracellular domain of ActRIIB, inhibited PPIs between ActRIIB expressed on the cell surface and its ligands, and subsequently suppressed activation of Smad that serves as the downstream signal of the ActRIIB pathway. Interestingly, these peptidic antagonists displayed different ligand selectivities; the AR2mini peptide inhibited multiple ligands (activin A, MSTN, GDF11, and BMP9), AR9 inhibited MSTN and GDF11, while AR8 selectively inhibited MSTN. This is the first report of artificial peptidic ActRIIB-antagonists possessing ligand-selectivity. Artificial ActRIIB-antagonist peptides were discovered by phage display. These peptides selectively bound to the extracellular domain of ActRIIB. They antagonized ActRIIB expressed on the cell surface. They presented multiple ligand selectivities.
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Nishizawa N, Niida A, Masuda Y, Kumano S, Yokoyama K, Hirabayashi H, Amano N, Ohtaki T, Asami T. Antiobesity Effect of a Short-Length Peptide YY Analogue after Continuous Administration in Mice. ACS Med Chem Lett 2017; 8:628-631. [PMID: 28626523 PMCID: PMC5467190 DOI: 10.1021/acsmedchemlett.7b00047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/01/2017] [Indexed: 11/29/2022] Open
Abstract
Gastrointestinal peptides such as peptide YY (PYY) can regulate appetite, which is relevant to the study of obesity. The intraperitoneal bolus administration of PYY3-36 and a 12-amino acid PYY analogue, benzoyl-[Cha27,28,36,Aib31]PYY25-36 (1), showed similar anorectic activity by activating the Y2 receptor (Y2R). However, food intake inhibition and body weight loss were not observed upon continuous subcutaneous administration of 1 with osmotic pumps in diet-induced obese (DIO) mice. N-Terminal elongation of 1, together with amino acid substitution at position 24, led to a hydrophilic 14-amino acid peptide, Ac-[d-Hyp24,Cha27,28,36,Aib31]PYY23-36 (18), that showed higher affinity and more potent agonist activity for Y2R and a robust anorectic activity with potency similar to that of PYY3-36. In addition, the continuous subcutaneous administration of 18 at 0.3 mg/(kg·day) induced significant body weight loss in DIO mice. These results suggest that a short-length PYY analogue can be a lead compound for antiobesity therapy in a sustained-release formulation.
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Umemoto T, Sakamoto K, Fukuda Y, Adachi Y, Tani A, Asami T. A Glutamic Acid Analog Bearing an Ethylenediamine Moiety Promotes the Cytosolic Delivery of TAT Peptides. CHEM LETT 2017. [DOI: 10.1246/cl.170097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nishizawa N, Niida A, Masuda Y, Kumano S, Yokoyama K, Hirabayashi H, Amano N, Ohtaki T, Asami T. A Short-Length Peptide YY Analogue with Anorectic Effect in Mice. ACS OMEGA 2017; 2:2200-2207. [PMID: 30023658 PMCID: PMC6044503 DOI: 10.1021/acsomega.7b00258] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 05/08/2017] [Indexed: 06/08/2023]
Abstract
Peripheral administration of PYY3-36, a fragment of peptide YY (PYY), has been reported to reduce food intake by activating the neuropeptide Y2 receptor (Y2R). An N-terminally truncated PYY analogue, benzoyl-[Ala26,Ile28,31]PYY(25-36) (1), showed a relatively potent agonist activity for Y2R but a weak anorectic activity by intraperitoneal administration (2000 nmol/kg) in lean mice because of its markedly poor biological stability in the mouse serum. Notably, two cyclohexylalanine (Cha) substitutions for Tyr residues at positions 27 and 36 (4) improved the stability in the mouse serum concomitant with enhanced anorectic activity. Further optimization at positions 27, 28, 30, and 31 revealed that 21, containing Cha28 and Aib31 residues, showed a more potent anorectic activity than PYY3-36 at a low dose of 300 nmol/kg. The minimum effective dose by intraperitoneal administration of 21 was 30 nmol/kg (ca. 52 μg/kg) in mice, suggesting the biologic potential of short-length PYY3-36 analogues with a potent anorectic effect.
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Niida A, Sasaki S, Yonemori K, Sameshima T, Yaguchi M, Asami T, Sakamoto K, Kamaura M. Investigation of the structural requirements of K-Ras(G12D) selective inhibitory peptide KRpep-2d using alanine scans and cysteine bridging. Bioorg Med Chem Lett 2017; 27:2757-2761. [PMID: 28457754 DOI: 10.1016/j.bmcl.2017.04.063] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 04/17/2017] [Accepted: 04/19/2017] [Indexed: 11/27/2022]
Abstract
A structure-activity relationship study of a K-Ras(G12D) selective inhibitory cyclic peptide, KRpep-2d was performed. Alanine scanning of KRpep-2d focusing on the cyclic moiety showed that Leu7, Ile9, and Asp12 are the key elements for K-Ras(G12D) selective inhibition of KRpep-2d. The cysteine bridging was also examined to identify the stable analog of KRpep-2d under reductive conditions. As a result, the KRpep-2d analog (12) including mono-methylene bridging showed potent K-Ras(G12D) selective inhibition in both the presence and the absence of dithiothreitol. This means that mono-methylene bridging is an effective strategy to obtain a reduction-resistance analog of parent disulfide cyclic peptides. Peptide 12 inhibited proliferation of K-Ras(G12D)-driven cancer cells significantly. These results gave valuable information for further optimization of KRpep-2d to provide novel anti-cancer drug candidates targeting the K-Ras(G12D) mutant.
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Adachi Y, Sakimura K, Shimizu Y, Nakayama M, Terao Y, Yano T, Asami T. Potent and selective oxytocin receptor agonists without disulfide bridges. Bioorg Med Chem Lett 2017; 27:2331-2335. [PMID: 28438540 DOI: 10.1016/j.bmcl.2017.04.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/07/2017] [Accepted: 04/11/2017] [Indexed: 12/31/2022]
Abstract
Oxytocin (OT) is a neuropeptide involved in a wide variety of physiological actions, both peripherally and centrally. Many human studies have revealed the potential of OT to treat autism spectrum disorders and schizophrenia. OT interacts with the OT receptor (OTR) as well as vasopressin 1a and 1b receptors (V1aR, V1bR) as an agonist, and agonistic activity for V1aR and V1bR may have a negative impact on the therapeutic effects of OTR agonism in the CNS. An OTR-selective agonistic peptide, FE 202767, in which the structural differences from OT are a sulfide bond instead of a disulfide bond, and N-alkylglycine replacement for Pro at position 7, was reported. However, the effects of amino acid substitutions in OT have not been comprehensively investigated to compare OTR, V1aR, and V1bR activities. This led us to obtain a new OTR-selective analog by comprehensive amino acid substitutions of OT and replacement of the disulfide bond. A systematic amino acid scanning (Ala, Leu, Phe, Ser, Glu, or Arg) of desamino OT (dOT) at positions 2, 3, 4, 5, 7, and 8 revealed the tolerability for the substitution at positions 7 and 8. Further detailed study showed that trans-4-hydroxyproline (trans-Hyp) at position 7 and γ-methylleucine [Leu(Me)] at position 8 were markedly effective for improving receptor selectivity without decreasing the potency at the OTR. Subsequently, a combination of these amino acid substitutions with the replacement of the disulfide bond of dOT analogs with a sulfide bond (carba analog) or an amide bond (lactam analog) yielded several promising analogs, including carba-1-[trans-Hyp7,Leu(Me)8]dOT (14) with a higher potency (7.2pM) at OTR than that of OT and marked selectivity (>10,000-fold) over V1aR and V1bR. Hence, we investigated comprehensive modification of OT and obtained new OT analogs that exhibited high potency at OTR with marked selectivity. These OTR-selective agonists could be useful to investigate OTR-mediated effects on psychiatric disorders.
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Adachi Y, Sakamoto K, Umemoto T, Fukuda Y, Tani A, Asami T. Investigation on cellular uptake and pharmacodynamics of DOCK2-inhibitory peptides conjugated with cell-penetrating peptides. Bioorg Med Chem 2017; 25:2148-2155. [PMID: 28284862 DOI: 10.1016/j.bmc.2017.02.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 02/09/2017] [Accepted: 02/10/2017] [Indexed: 10/20/2022]
Abstract
Protein-protein interaction between dedicator of cytokinesis 2 (DOCK2) and Ras-related C3 botulinum toxin substrate 1 (Rac1) is an attractive intracellular target for transplant rejection and inflammatory diseases. Recently, DOCK2-selective inhibitory peptides have been discovered, and conjugation with oligoarginine cell-penetrating peptide (CPP) improved inhibitory activity in a cell migration assay. Although a number of CPPs have been reported, oligoarginine was only one example introduced to the inhibitory peptides. In this study, we aimed to confirm the feasibility of CPP-conjugation approach for DOCK2-inhibitory peptides, and select preferable sequences as CPP moiety. First, we evaluated cell permeability of thirteen known CPPs and partial sequences of influenza A viral protein PB1-F2 using an internalization assay system based on luciferin-luciferase reaction, and then selected four CPPs with efficient cellular uptake. Among four conjugates of these CPPs and a DOCK2-inhibitory peptide, the inhibitory activity of a novel CPP, PB1-F2 fragment 5 (PF5), conjugate was comparable to oligoarginine conjugate and higher than that of the non-conjugated peptide. Finally, internalization assay revealed that oligoarginine and PF5 increased the cellular uptake of inhibitory peptides to the same extent. Hence, we demonstrated that CPP-conjugation approach is applicable to the development of novel anti-inflammatory drugs based on DOCK2 inhibition by investigating both cellular uptake and bioactivity.
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Ohnishi T, Sakamoto K, Asami-Odaka A, Nakamura K, Shimizu A, Ito T, Asami T, Ohtaki T, Inooka H. Generation of a novel artificial TrkB agonist, BM17d99, using T7 phage-displayed random peptide libraries. Biochem Biophys Res Commun 2017; 483:101-106. [DOI: 10.1016/j.bbrc.2016.12.186] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 12/29/2016] [Indexed: 11/30/2022]
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Sakamoto K, Adachi Y, Komoike Y, Kamada Y, Koyama R, Fukuda Y, Kadotani A, Asami T, Sakamoto JI. Novel DOCK2-selective inhibitory peptide that suppresses B-cell line migration. Biochem Biophys Res Commun 2016; 483:183-190. [PMID: 28039053 DOI: 10.1016/j.bbrc.2016.12.170] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 12/25/2016] [Indexed: 12/13/2022]
Abstract
Dedicator of cytokinesis 2 (DOCK2) is a key molecule for lymphocyte activation and migration. DOCK2 interacts with Ras-related C3 botulinus toxin substrate 1 (Rac1, GTPase) and mediates the GDP-GTP exchange reaction, indicating that inhibitors against protein-protein interaction (PPI) between DOCK2 and Rac1 would be good drug candidates for treating immune-related disorders. Here, we report DOCK2-selective PPI inhibitory peptides discovered using random peptide T7 phage display technology. These peptides inhibited DOCK2 activity at nanomolar concentrations and were delivered to intracellular compartments by combination with cell-penetrating peptide (CPP). Consequently, one peptide, R4-DCpep-2(V2W/K4R/ox)-NH2 (Ac-RRRRCWARYHGYPWCRRRR-NH2), inhibited migration in human B lymphocyte MINO cell line at IC50 = 120 nM. To our knowledge, this is the first report of a DOCK2-selective peptide inhibitor; this study will contribute to the development of novel DOCK2-targeting immunosuppressive drugs.
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Nishizawa N, Takatsu Y, Kumano S, Kiba A, Ban J, Tsutsumi S, Matsui H, Matsumoto SI, Yamaguchi M, Ikeda Y, Kusaka M, Ohtaki T, Itoh F, Asami T. Design and Synthesis of an Investigational Nonapeptide KISS1 Receptor (KISS1R) Agonist, Ac-d-Tyr-Hydroxyproline (Hyp)-Asn-Thr-Phe-azaGly-Leu-Arg(Me)-Trp-NH2 (TAK-448), with Highly Potent Testosterone-Suppressive Activity and Excellent Water Solubility. J Med Chem 2016; 59:8804-8811. [DOI: 10.1021/acs.jmedchem.6b00379] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Asami T, Nishizawa N, Matsui H, Takatsu Y, Suzuki A, Kiba A, Terada M, Nishibori K, Nakayama M, Ban J, Matsumoto SI, Tarui N, Ikeda Y, Yamaguchi M, Kusaka M, Ohtaki T, Kitada C. Physicochemically and Pharmacokinetically Stable Nonapeptide KISS1 Receptor Agonists with Highly Potent Testosterone-Suppressive Activity. J Med Chem 2014; 57:6105-15. [DOI: 10.1021/jm5005489] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Koike H, Asami T, Yoshida S, Takahashi N, Inoue Y. A New-Type Photosystem II Inhibitor which Blocks Electron Transport in Water-Oxidation System. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znc-1989-3-416] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The mode of action of three types of conjugated enamine compounds was investigated by means of thermoluminescence measurement. Cyanoacrylate and 2-(l-ethoxyethylam inom ethylidene)- 4-dodecyl-5,5-dim ethyl-cyclohexane-1,3-dione (ACm12) converted the B-band (30 °C) arising from S2QB
- charge recombination to a downshifted 6 °C-band. This band was proved to be identical with the DCM U-induced Q-band (6 °C) arising from S2QA
- recombination, indicating that these two compounds block QA to QB electron transport. 3-(1-dodecylam inopropyridene)-6- methyl-2H-pyran-2,4-dione (APp12 ), on the other hand, induced an abnormal band peaking at 15 °C between the Q-band and B-band. From the gradual downshift of its peak temperature in titration experiments, this band was assigned to arise from a modified S2QB
- charge pair, in which the properties of either QB
- or S2 is altered. The 15 °C-band showed normal oscillation during the first 2 flashes, but the oscillation was interrupted thereafter. Another therm oluminescence analysis by use of post flash low temperature illumination protocol revealed that APp12 affects neither QA to QB nor QB
2- to PQ electron transport, but specifically blocks S3 to S0 transition. These results indicate that APp12 is a new-type PS II inhibitor.
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