Abstract:
:We present a new feature selection algorithm for structure-activity and structure-property correlation based on particle swarms. Particle swarms explore the search space through a population of individuals that adapt by returning stochastically toward previously successful regions, influenced by the success of their neighbors. This method, which was originally intended for searching multidimensional continuous spaces, is adapted to the problem of feature selection by viewing the location vectors of the particles as probabilities and employing roulette wheel selection to construct candidate subsets. The algorithm is applied in the construction of parsimonious quantitative structure-activity relationship (QSAR) models based on feed-forward neural networks and is tested on three classical data sets from the QSAR literature. It is shown that the method compares favorably with simulated annealing and is able to identify a better and more diverse set of solutions given the same amount of simulation time.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Agrafiotis DK,Cedeño Wdoi
10.1021/jm0104668keywords:
subject
Has Abstractpub_date
2002-02-28 00:00:00pages
1098-107issue
5eissn
0022-2623issn
1520-4804pii
jm0104668journal_volume
45pub_type
杂志文章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
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更新日期:2010-04-22 00:00:00
abstract::A series of 4(6)- and 5-phenyl-substituted 2-amino- and 2-[(alkoxycarbonyl)amino]-1,4,5,6-tetrahydropyrimidines were prepared and evaluated for central nervous system (CNS) effects in animal models. Several 5-phenyl-substituted compounds possessed potent antidepressant activity and all compounds in this series were de...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00383a002
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abstract::Omapatrilat was designed as a vasopeptidase inhibitor with dual activity against the zinc metallopeptidases angiotensin-1 converting enzyme (ACE) and neprilysin (NEP). ACE has two homologous catalytic domains (nACE and cACE), which exhibit different substrate specificities. Here, we report high-resolution crystal stru...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/acs.jmedchem.8b01309
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abstract::A new series of compounds were designed as structural analogues of the alpha(1)-AR ligand RN5 (4), characterized by a tricyclic 5H-pyrimido[5,4-b]indole-(1H,3H)2,4-dione system connected through an alkyl chain to a phenylpiperazine (PP) moiety. These compounds were synthesized and tested in binding assays on human alp...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm0307741
更新日期:2003-07-03 00:00:00
abstract::Analogues of 9-(2-fluorobenzyl)-6-(methylamino)-9H-purine (1) containing isosteric replacements of the imidazole ring atoms were synthesized and tested for anticonvulsant activity. The pyrrolo[2,3-d]-, pyrazolo[3,4-d]-, and triazolo[4,5-d]pyrimidines were less active than 1 against maximal electroshock-induced seizure...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00019a019
更新日期:1995-09-15 00:00:00
abstract::(-)-P7C3-S243 is a neuroprotective aminopropyl carbazole with improved druglike properties compared with previously reported compounds in the P7C3 class. It protects developing neurons in a mouse model of hippocampal neurogenesis and protects mature neurons within the substantia nigra in a mouse model of Parkinson's d...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm401919s
更新日期:2014-05-08 00:00:00
abstract::Six new analogues of 1α,25-dihydroxy-19-norvitamin D(3) (3a-4b, 5, and 6) were prepared by a convergent synthesis applying the Wittig-Horner reaction as a key step. The influence of methyl groups at C-22 on their biological activity was examined. It was established that both in vitro and in vivo activity is strongly d...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm300187x
更新日期:2012-05-10 00:00:00
abstract::The synthesis of new meridianin derivatives is described. The indolic ring system was substituted at the C-4 to C-7 positions either by a bromine atom or by nitro or amino groups. Additionally, an iodine atom or various aryl groups were introduced at the C-5 position of the 2-aminopyrimidine ring. These compounds as w...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm200464w
更新日期:2011-07-14 00:00:00
abstract::N-(R)- and N-(S)-lactylsphingosine and their corresponding dihydrosphingosine derivatives were synthesized. The antileukemic activities of these compounds were measured by MTT (3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide) assay in human leukemia HL-60 cells. N-(R)- and N-(S)-Lactylsphingosine disp...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm030125p
更新日期:2003-07-31 00:00:00
abstract::Ten analogues of the highly mu-receptor selective cyclic opioid peptide H-Tyr-D-Orn-Phe-Asp-NH2 (1) were synthesized by the solid phase method and were characterized in vitro in mu- and delta-receptor representative binding assays and bioassays. These cyclic analogues are structurally related to the linear opioid pept...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00394a027
更新日期:1987-11-01 00:00:00
abstract::The interesting bronchodilator activity of certain dl-11-deoxy-3-thiaprostaglandins and their preparation by the conjugate addition of appropriately substituted (E)-1-alkenyllithio cuprate reagents to requisite cyclopentenones are described. ...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00222a024
更新日期:1977-12-01 00:00:00
abstract::A four-step synthesis of 2-chlorodopamine (2b) is presented as well as methods for the syntheses of the N-methyl, ethyl, and n-propyl analogues (2c-e). Compounds 2b and 2c were essentially equipotent to dopamine for increasing renal blood flow in anesthetized dogs that had been treated with the alpha-adrenergic antago...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00159a005
更新日期:1986-09-01 00:00:00
abstract::Reaction of 3'-acetylthymidine with phosphorus oxychloride in trimethyl phosphate yielded the phosphorodichloridate 5, which was subsequently reacted with aziridine, or 2,2-dimethylaziridine to give compounds 6 and 7, respectively. The 2,2-dimethylaziridine derivative 7 was considerably more active than 6 against leuk...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00139a024
更新日期:1981-07-01 00:00:00
abstract::Two new long-acting hydrazone derivatives of 14-hydroxydihydromorphinones have been synthesized, oxymorphazone and naltrexazone. Both derivatives show high affinity for opiate binding sites in vitro, similar to naloxazone, the hydrazone analogue of naloxone. Sodium and manganese shifts imply that naltrexazone, like na...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00180a019
更新日期:1980-06-01 00:00:00
abstract::The (E)-8-benzylidene and (E)-8-(3,4-dichlorobenzylidene), 7-ketone derivatives, 5 and 6, of the synthetic opiate 2-methyl-5-(3-hydroxyphenyl)morphan [5-(3-hydroxyphenyl)-2-methyl-2-azabicyclo[3.3.1]nonane, 1], were synthesized from the 7-ketone derivatives 2 or 4 via the Claisen-Schmidt reaction. The corresponding en...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00045a022
更新日期:1994-09-16 00:00:00
abstract::Dual-acting kappa opioid receptor (KOR) agonist and mu opioid receptor (MOR) partial agonist ligands have been put forward as potential treatment agents for cocaine and other psychostimulant abuse. Members of the orvinol series of ligands are known for their high binding affinity to both KOR and MOR, but efficacy at t...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm301543e
更新日期:2013-04-25 00:00:00
abstract::A series of tetrazole amide derivatives of (+/-)-2-dodecyl-alpha-phenyl-N-(2,4,6-trimethoxyphenyl)-2H-tetrazole-5- acetamide (1) was prepared and evaluated for their ability to inhibit acyl-CoA: cholesterol O-acyltransferase (ACAT) in vitro and to lower plasma total cholesterol in vivo. For this series of compounds, o...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm960170f
更新日期:1996-06-07 00:00:00
abstract::A series of 8-(substituted phenyl) derivatives of theophylline and other 1,3-dialkylxanthines were evaluated for potency and selectivity as antagonists at A1- and A2-adenosine receptors in brain tissue. Theophylline has a similar potency (Ki = 14 microM) at both A1 and A2 receptors. 8-Phenyltheophylline is 25-35-fold ...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00382a018
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abstract::The synthesis, antiarrhythmic activity, and blood hydrolysis properties of a series of mono- and bis(aminomethyl)phenylacetic acid esters related to a previously reported class Ic antiarrhythmic agent (ACC-9358) are described. Of the various oxa-, aza-, thia-, and carbacyclic esters initially prepared in the bis(pyrro...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00069a007
更新日期:1993-08-20 00:00:00
abstract::FLT3 receptor tyrosine kinase is aberrantly active in many cases of acute myeloid leukemia (AML). Recently, bis(1H-indol-2-yl)methanones were found to inhibit FLT3 and PDGFR kinases. To optimize FLT3 activity and selectivity, 35 novel derivatives were synthesized and tested for inhibition of FLT3 and PDGFR autophospho...
journal_title:Journal of medicinal chemistry
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更新日期:2006-06-01 00:00:00
abstract::A pair of enantiomeric Pt(II) complexes, [Pt(R-ahaz)Cl2] and [Pt(S-ahaz)Cl2] (ahaz = 3-aminohexahydroazepine), has been investigated for their ability to bind enantioselectively to DNA. Improved synthetic procedures were developed for preparing both the ligands and the Pt complexes. The structure of the complex of the...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm9607966
更新日期:1997-03-28 00:00:00
abstract::A series of 1-[1-(3,4-dimethoxy-1H-2-benzopyran-1-yl)alkyl]-4-arylpiperazines that shows hypotensive activity in the conscious rat has been investigated. Structure-activity relationships are described. A typical example that was investigated in greater detail is 1-[2-(3,4-dihydro-6,7-dimethoxy-1H-2-benzopyran-1-yl)eth...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00343a015
更新日期:1982-01-01 00:00:00
abstract::Selenosemicarbazones show marked antitumor activity. However, their mechanism of action remains unknown. We examined the medicinal chemistry of the selenosemicarbazone, 2-acetylpyridine 4,4-dimethyl-3-selenosemicarbazone (Ap44mSe), and its iron and copper complexes to elucidate its mechanisms of action. Ap44mSe demons...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/acs.jmedchem.5b01399
更新日期:2016-01-14 00:00:00
abstract::The design, synthesis, and activity of a novel series of 2,5-substituted tryptamine derivatives at vascular 5HT1B-like receptors is described. Several important auxiliary binding sites of the 5HT1B-like receptor have been proposed following various modifications to the 2-substituent and especially to the methylene- or...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm9605849
更新日期:1997-07-18 00:00:00
abstract::Glycogen synthase kinase -3 (GSK-3) is a key enzyme involved in numerous physiological events and in major diseases, such as Alzheimer's disease, diabetes, and cardiac hypertrophy. Indirubins are bis-indoles that can be generated from various natural sources or chemically synthesized. While rather potent and selective...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm800648y
更新日期:2008-10-23 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::Three analogs of luteinizing hormone-releasing hormone (LH-RH) of the structure less than Glu-His-Trp-Ser-Tyr-Gly-Gly-Leu-Arg-Pro-Gly-NH2, involving substitutions inpositions 1, 3, and 8 with nonprotein amino acids, have been synthesized by the solid-phase method. They are [pyro-L-alpha-(1-aminoadipic)]-LH-RH, [3-(2-n...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm00226a008
更新日期:1976-04-01 00:00:00
abstract::Protein tyrosine phosphatases (PTPs) constitute a diverse family of enzymes that, together with protein tyrosine kinases, control the level of intracellular tyrosine phosphorylation, thus regulating many cellular functions. PTP1B negatively regulates insulin signaling, in part, by dephosphorylating key tyrosine residu...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm011100y
更新日期:2002-04-25 00:00:00
abstract::A series of α-ketooxazoles containing conformational constraints in the C2 acyl side chain of 2 (OL-135) were examined as inhibitors of fatty acid amide hydrolase (FAAH). Only one of the two possible enantiomers displayed potent FAAH inhibition (S vs R enantiomer), and their potency is comparable or improved relative ...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm101597x
更新日期:2011-04-28 00:00:00
abstract::In our search for new therapeutic agents against chronic hepatitis C, a ribonucleoside analogue, 2'-C-methylcytidine, was discovered to be a potent and selective inhibitor in cell culture of a number of RNA viruses, including the pestivirus bovine viral diarrhea virus, a surrogate model for hepatitis C virus (HCV), an...
journal_title:Journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1021/jm0603623
更新日期:2006-11-02 00:00:00