Abstract:
:The prevalence of neurotensin receptor (NTR) in several human tumors makes it an attractive target for the delivery of cytotoxic drugs and imaging agents. Native neurotensin (NT) is a tridecapeptide that binds to NTR and induces tumor growth. Unfortunately, NT has a short plasma half-life, which hinders its use for in vivo biomedical applications. Numerous reports suggest that Arg(8)-Arg(9) and Tyr(11)-Ile(12) amide bonds are particularly susceptible to degradation by proteolytic enzymes. Predicated on this observation, we substituted Arg(8), Arg(9), and Ile(12) amino acids with the corresponding commercially available mimics. These surrogate amino acids are amenable to standard Fmoc peptide synthesis strategy, and the resulting compounds are stable in biological media for >4 h and bind to NTR with high affinity. Furthermore, conjugating DTPA to the new peptides and subsequent labeling with (111)In-DTPA for nuclear imaging or fluorescein for optical imaging did not diminish the NTR binding affinities of the peptides. In vivo biodistribution of a representative (111)In-DTPA-NT peptide analogue in SCID mice bearing NTR-positive human adenocarcinoma (HT29) xenograft shows that the compound was primarily retained in tumor tissue (2.2% ID/g) and the kidneys (4.8% ID/g) at 4 h postinjection. Coinjection of cold NT and the radiolabeled NT peptide analogue inhibited the tumor but not the kidney uptake, demonstrating that retention of the radiolabeled compound in tumor tissue was mediated by NTR specific uptake while it accumulates in the kidneys by a nonspecific mechanism. These findings show that the new NT peptide analogues are robust and can deliver imaging agents to NTR-positive tumors such as pancreatic cancer.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Achilefu S,Srinivasan A,Schmidt MA,Jimenez HN,Bugaj JE,Erion JLdoi
10.1021/jm030081kkeywords:
subject
Has Abstractpub_date
2003-07-17 00:00:00pages
3403-11issue
15eissn
0022-2623issn
1520-4804journal_volume
46pub_type
杂志文章abstract::C-terminal fragment analogues of the leech anticoagulant peptide hirudin represent a unique class of thrombin inhibitors that blocks thrombin's cleavage of fibrinogen but does not block the catalytic site of thrombin. In this paper, a series of synthetic peptides were prepared by solid-phase methodology to determine t...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00400a020
更新日期:1988-05-01 00:00:00
abstract::Because of the double-edged nature of NO, the development of isoform-selective NOS substrates is a highly desirable goal. Given the striking similarity in the heme active sites of the three NOS isoforms, it presents an challenging problem. Several N-aryl-N'-hydroxyguanidines have recently been shown as substrates that...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm0340703
更新日期:2003-06-05 00:00:00
abstract::A one-pot synthesis of ageladine A and analogues is reported. The key Pictet-Spengler reaction between 2-aminohistamine and aryl aldehydes has been successfully utilized for the synthesis of the natural product and 14 analogues. These compounds were screened for their matrix metalloprotease (MMP) and kinase inhibition...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm200039m
更新日期:2011-04-14 00:00:00
abstract::Inhibitors of checkpoint kinase 1 (CHK1) are of current interest as potential antitumor agents, but the most advanced inhibitor series reported to date are not orally bioavailable. A novel series of potent and orally bioavailable 3-alkoxyamino-5-(pyridin-2-ylamino)pyrazine-2-carbonitrile CHK1 inhibitors was generated ...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm3012933
更新日期:2012-11-26 00:00:00
abstract::Structure-based methods were used to design a potent and highly selective group II p21-activated kinase (PAK) inhibitor with a novel binding mode, compound 17. Hydrophobic interactions within a lipophilic pocket past the methionine gatekeeper of group II PAKs approached by these type I 1/2 binders were found to be imp...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm401768t
更新日期:2014-02-13 00:00:00
abstract::By use of standard cuprate methodology, a series of 18-cycloalkyl analogues of enisoprost was prepared in an effort to impede omega chain metabolism and prolong duration of gastric antisecretory activity. An initial product of omega chain oxidation, the C-20 hydroxy analogue, was also synthesized for pharmacological c...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00125a013
更新日期:1989-05-01 00:00:00
abstract::The synthesis of a series of 1-phenoxy-3-[[(substituted-amido)alkyl]amino]-2-propanols is described. Many of the compounds are more potent than propanolol as beta blockers, while having cardioselectivity comparable to that of practolol, when given intravenously to anesthetized cats. The structure-activity relationship...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00353a004
更新日期:1982-11-01 00:00:00
abstract::The identification of centrally efficacious β-secretase (BACE1) inhibitors for the treatment of Alzheimer's disease (AD) has historically been thwarted by an inability to maintain alignment of potency, brain availability, and desired absorption, distribution, metabolism, and excretion (ADME) properties. In this paper,...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm501833t
更新日期:2015-03-26 00:00:00
abstract::N5-Acetyl-N5-hydroxy-L-ornithyl-N5-acetyl-N5-hydroxy-L-ornithyl-N5-acety l- N5-hydroxy-L-ornithine, the functionally instrumental component of the albomycins and ferrichromes, has been incorporated as a "carrier" substructure into both carbacephalosporin and oxamazin type beta-lactam antibiotics. The previously synthe...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00107a014
更新日期:1991-03-01 00:00:00
abstract::A new and extensive set of 4-(6-iodo-H-imidazo[1,2-a]pyridin-2-yl)-N-dimethylbenzeneamine (IMPY) derivatives was synthesized and assayed for affinity toward human Abeta plaques. 6-Ethylthio- (12h), 6-cyano- (12e), 6-nitro- (12f), and 6-p-methoxybenzylthio- (15d) analogues were discovered to have high affinity (KI < 10...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm0702231
更新日期:2007-09-20 00:00:00
abstract::A facile route to perillyl alcohol (POH) differential glycosylation and the corresponding synthesis of a set of 34 POH glycosides is reported. Subsequent in vitro studies revealed a sugar dependent antiproliferative activity and the inhibition of S6 ribosomal protein phosphorylation as a putative mechanism of represen...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm500870u
更新日期:2014-09-11 00:00:00
abstract::The importance of steric factors in quantitative structure-activity relationships involving steroid hormones is discussed. a variety of steric parameters, such as parachlor, molecular volume, van der Waals volume, and including difference and squared steric terms, is explored in an attempt to find preferred forms for...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00228a002
更新日期:1976-06-01 00:00:00
abstract::The use of deuteration in medicinal chemistry has exploded in the past years, and the FDA has recently approved the first deuterium-labeled drug. Precision deuteration goes beyond the pure and simple amelioration of the pharmacokinetic parameters of a drug and might provide an opportunity when facing problems in terms...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章,评审
doi:10.1021/acs.jmedchem.8b01808
更新日期:2019-06-13 00:00:00
abstract::A new goup of acridone derivatives, obtained by reaction of acridone-4-carboxylic acid derivatives with aromatic amines, was tested to determine the inhibitory properties toward the NS3 helicase of hepatitis C virus (HCV). Six compounds inhibited the NS3 helicase at low concentrations (IC(50) from 1.5 to 20 microM). T...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm901741p
更新日期:2010-04-22 00:00:00
abstract::Understanding the "limits and boundaries" of the central nervous system (CNS) property space is a critical aspect of modern CNS drug design. Medicinal chemists are often guided by the physicochemical properties of marketed CNS drugs, which are heavily biased toward "traditional" aminergic targets and commonly describe...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章,收录出版
doi:10.1021/acs.jmedchem.6b01469
更新日期:2017-07-27 00:00:00
abstract::A series of 3-(4-acylaminopiperazin-1-ylalkyl)indoles was synthesized and tested for antihypertensive activity. Compounds with no substituents in the indole portion of the molecule were generally most effective in lowering blood pressure in the spontaneous hypertensive rat model. Of these several analogues were very p...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00221a024
更新日期:1977-11-01 00:00:00
abstract::The F9/Yde/Fml pilus, tipped with the FmlH adhesin, has been shown to provide uropathogenic Escherichia coli (UPEC) a fitness advantage in urinary tract infections (UTIs). Here, we used X-ray structure guided design to optimize our previously described ortho-biphenyl Gal and GalNAc FmlH antagonists such as compound 1 ...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/acs.jmedchem.8b01561
更新日期:2019-01-24 00:00:00
abstract::N delta-Acyl derivatives of the potent folylpolyglutamate synthetase (FPGS) inhibitor N alpha-(4-amino-4-deoxypteroyl)-L-ornithine (APA-L-Orn) were synthesized from N alpha-(4-amino-4-deoxy-N10-formylpteroyl)-L-ornithine by reaction with an N-(acyloxy)succinimide or acyl anhydride, followed by deformylation with base....
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00402a013
更新日期:1988-07-01 00:00:00
abstract::The mechanistic target of rapamycin (mTOR) plays a pivotal role in growth and tumor progression and is an attractive target for cancer treatment. ATP-competitive mTOR kinase inhibitors (TORKi) have the potential to overcome limitations of rapamycin derivatives in a wide range of malignancies. Herein, we exploit a conf...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/acs.jmedchem.9b00972
更新日期:2019-09-26 00:00:00
abstract::The nuclear receptor Nurr1 can be activated by RXR via heterodimerization (RXR-Nurr1) and is a promising target for treating neurodegenerative diseases. We herein report the enantioselective synthesis and SAR of sterically constricted benzofurans at RXR. The established SAR, using whole cell functional assays, lead to...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/acs.jmedchem.5b01702
更新日期:2016-02-11 00:00:00
abstract::In the present study, the synthesis of the 5.5.6. and 5.6.5. spiro bicyclic lactam PLG peptidomimetics, compounds 3 and 4, respectively, was undertaken. These peptidomimetics were designed to examine the following: (1) the effect that changing the size of the thiazolidine and lactam ring systems would have on the abil...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm980525q
更新日期:1999-02-25 00:00:00
abstract::Structure/activity studies on atrial natriuretic peptide ANP (1-28) have highlighted three portions of the native molecule as necessary for its biological responses. We have linked these three regions and excised the remaining segments to produce a family of small analogues (less than half the size of the parent) whic...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00083a003
更新日期:1992-03-06 00:00:00
abstract::Structure dependent efficacy studies in the field of selective D4 ligands led to the 2-aminomethyl substituted azaindole 2 (FAUC 213) that displayed strong D4 binding, high subtype selectivity, and complete antagonist properties in ligand-induced mitogenesis experiments. According to our schematic molecular model, the...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm015522j
更新日期:2001-08-16 00:00:00
abstract::A series of 6-beta-thiosaccharide analogues of morphine-6-glucuronide (M6G) and codeine-6-glucuronide (C6G) were synthesized and evaluated with the objective of preparing an analogue of M6G with improved biological activity. The affinity of the thiosaccharide analogues of M6G and C6G was examined by competitive bindin...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm049554t
更新日期:2004-11-04 00:00:00
abstract::Long chain fatty acid elongase 6 (ELOVL6) catalyzes the elongation of long chain fatty acyl-CoAs and is a potential target for the treatment of metabolic disorders. The ultrahigh throughput screen of our corporate chemical collections resulted in the identification of a novel 3-sulfonyl-8-azabicyclo[3.2.1]octane class...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm900488k
更新日期:2009-07-23 00:00:00
abstract::A number of novel alpha-melanotropin (alpha-MSH) analogues have been designed, synthesized, and assayed for bioactivity at the melanocortin-1 (MC1) receptor from Xenopus frog skin, and selected potent analogues were examined at recombinant human MC1, MC3, and MC4 receptors expressed in human embryonic kidney (HEK) cel...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm020355o
更新日期:2003-02-27 00:00:00
abstract::Antimicrobial resistance (AMR) represents a hot topic in drug discovery. Besides the identification of new antibiotics, the use of nonantibiotic molecules to block resistance mechanisms is a powerful alternative. Bacterial efflux pumps exert an early step in AMR development by allowing bacteria to grow at subinhibitor...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/acs.jmedchem.8b00791
更新日期:2018-09-13 00:00:00
abstract::There has been significant interest in developing a transient receptor potential A1 (TRPA1) antagonist for the treatment of pain due to a wealth of data implicating its role in pain pathways. Despite this, identification of a potent small molecule tool possessing pharmacokinetic properties allowing for robust in vivo ...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/acs.jmedchem.6b00039
更新日期:2016-03-24 00:00:00
abstract::Reaction of 26 aromatic/heterocyclic sulfonamides containing amino, imino, hydrazino, or hydroxyl groups with Boc-Gly, Boc-Sar, TrS-Crt, or Boc-Gly-Gly (Sar = sarcosine, N-Me-Gly; Crt = creatine, N-amidinosarcosine; TrS = tritylsulfenyl; Boc = tert-butoxycarbonyl) in the presence of carbodiimide derivatives afforded a...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm9901879
更新日期:1999-09-09 00:00:00
abstract::The important enzyme 17 beta-hydroxysteroid dehydrogenase (17 beta-HSD) is known to regulate intracellular levels of biologically active steroids, namely, androgens and estrogens. In an effort to develop potent inhibitors of 17 beta-HSD for reducing the levels of active steroids, we found that steroidal spiro-gamma-la...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00022a018
更新日期:1995-10-27 00:00:00