Medicinal Chemistry
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Lithium perchlorate-, acetic anhydride-, and triphenylphosphine-assisted multicomponent syntheses of 4-unsubstituted 2,5-dioxooctahydroquinoline-3-carboxylates and 3-carbonitriles
(Elsevier, 2013-09-05)Lithium perchlorate and acetic anhydride were the key additives for the multi-component reaction between 3-aminocyclohex-2-enones, formaldehyde, and malonates yielding adducts that were annulated under acidic conditions ... -
A cellular complex of BACE1 and γ-secretase sequentially generates Aβ from its full-length precursor
(Rockefeller University Press, 2019-01-09)Intramembrane proteolysis of transmembrane substrates by the presenilin–γ-secretase complex is preceded and regulated by shedding of the substrate’s ectodomain by α- or β-secretase. We asked whether β- and γ-secretases ... -
Mimicry in viceroy butterflies is dependent on abundance of the model queen butterfly
(Nature Research, 2019-02-18)Mimics should not exist without their models, yet often they do. In the system involving queen and viceroy butterflies, the viceroy is both mimic and co-model depending on the local abundance of the model, the queen. Here, ... -
Antibody–Drug Conjugate that Exhibits Synergistic Cytotoxicity with an Endosome–Disruptive Peptide
(American Chemical Society, 2019-07-31)Antibody–drug conjugates are an important class of cancer therapeutics. These agents generally bind a specific cell surface receptor, undergo receptor-mediated endocytosis, and enter the endosomal–lysosomal system, where ... -
Structure of the Diphtheria Toxin at Acidic pH: Implications for the Conformational Switching of the Translocation Domain
(MDPI, 2020-11-07)Diphtheria toxin, an exotoxin secreted by Corynebacterium that causes disease in humans by inhibiting protein synthesis, enters the cell via receptor-mediated endocytosis. The subsequent endosomal acidification triggers a ... -
Relative Selectivity of Plant Cardenolides for Na+/K+-ATPases From the Monarch Butterfly and Non-resistant Insects
(Frontiers Media, 2018-09-28)A major prediction of coevolutionary theory is that plants may target particular herbivores with secondary compounds that are selectively defensive. The highly specialized monarch butterfly (Danaus plexippus) copes well ... -
Improved Schmidt Conversion of Aldehydes to Nitriles Using Azidotrimethylsilane in 1,1,1,3,3,3-Hexafluoro-2-propanol
(MDPI, 2015-12-29)The Schmidt reaction of aromatic aldehydes using a substoichiometric amount (40 mol %) of triflic acid is described. Low catalyst loading was enabled by a strong hydrogen-bond-donating solvent hexafluoro-2-propanol (HFIP). ... -
Pharmacokinetic evaluation of the PNC disassembler metarrestin in wild-type and Pdx1-Cre;LSL-KrasG12D/+;Tp53R172H/+ (KPC) mice, a genetically engineered model of pancreatic cancer
(Springer, 2018-10-10)Purpose Metarrestin is a first-in-class small molecule clinical candidate capable of disrupting the perinucleolar compartment, a subnuclear structure unique to metastatic cancer cells. This study aims to define the ... -
Mimicry in viceroy butterflies is dependent on abundance of the model queen butterfly
(Nature Research, 2019-02-18)Mimics should not exist without their models, yet often they do. In the system involving queen and viceroy butterflies, the viceroy is both mimic and co-model depending on the local abundance of the model, the queen. Here, ... -
The Intriguing Effects of Substituents in the N-Phenethyl Moiety of Norhydromorphone: A Bifunctional Opioid from a Set of “Tail Wags Dog” Experiments
(MDPI, 2020-06-06)(−)-N-Phenethyl analogs of optically pure N-norhydromorphone were synthesized and pharmacologically evaluated in several in vitro assays (opioid receptor binding, stimulation of [35S]GTPγS binding, forskolin-induced cAMP ... -
Evaluation of Biased and Balanced Salvinorin A Analogs in Preclinical Models of Pain
(Frontiers Media, 2020-07-21)In the search for safer, non-addictive analgesics, kappa opioid receptor (KOPr) agonists are a potential target, as unlike mu-opioid analgesics, they do not have abuse potential. Salvinorin A (SalA) is a potent and selective ... -
Synthetic lethality by targeting the RUVBL1/2-TTT complex in mTORC1-hyperactive cancer cells
(American Association for the Advancement of Science, 2020-07-31)Despite considerable efforts, mTOR inhibitors have produced limited success in the clinic. To define the vulnerabilities of mTORC1-addicted cancer cells and to find previously unknown therapeutic targets, we investigated ... -
Phenylalanine Stereoisomers of CJ-15,208 and [d-Trp]CJ-15,208 Exhibit Distinctly Different Opioid Activity Profiles
(MDPI, 2020-09-02)The macrocyclic tetrapeptide cyclo[Phe-d-Pro-Phe-Trp] (CJ-15,208) and its stereoisomer cyclo[Phe-d-Pro-Phe-d-Trp] exhibit different opioid activity profiles in vivo. The present study evaluated the influence of the Phe ... -
Design of Substrate Transmembrane Mimetics as Structural Probes for γ-Secretase
(American Chemical Society, 2020-01-30)γ-Secretase is a membrane-embedded aspartyl protease complex central in biology and medicine. How this enzyme recognizes transmembrane substrates and catalyzes hydrolysis in the lipid bilayer is unclear. Inhibitors that ... -
Reactive Metabolite Target Protein Database (TPDB)
(2020-08-03)The biotransformation of drugs and xenobiotic chemicals in living cells sometimes generates chemically reactive metabolites (CRMs) that diffuse through the cell and react covalently with cellular constituents, especially ... -
The Meta-Position of Phe4 in Leu-Enkephalin Regulates Potency, Selectivity, Functional Activity, and Signaling Bias at the Delta and Mu Opioid Receptors
(MDPI, 2019-12-12)As tool compounds to study cardiac ischemia, the endogenous δ-opioid receptors (δOR) agonist Leu5-enkephalin and the more metabolically stable synthetic peptide (d-Ala2, d-Leu5)-enkephalin are frequently employed. However, ... -
STUDIES OF INTERACTIONS OF SMALL MOLECULES WITH MEMBRANES AND PROTEINS
(University of Kansas, 2019-12-31)The modern molecular understanding of biological systems relies on integration of principles, practices, and techniques from diverse fields such as molecular biology, biochemistry, and biophysics. This approach has provided ... -
Bioactivity Profiling of Plant Biodiversity of Panama by High Throughput Screening
(SAGE Publications, 2019-01-01)We report relative bioactivities of extracts prepared from a large collection of plants from three national parks in Panama. Over 181 plants were collected, taxonomically identified and their detannified dichloromethane ... -
Discovery of Novel Inhibitors of Cellular Efflux by High-Content Screening with a Fluorescent Mimic of Taxol
(University of Kansas, 2019-08-31)Fluorescence-based assays play key roles in drug discovery and development. These assays are widely used due to the widespread availability of fluorescent probes and highly sensitive detection platforms. This method is a ... -
Synthesis and Evaluation of Fluorescent Tools for Studies of Cancer Biology
(University of Kansas, 2019-08-31)A key enabling technology in biological sciences involves fluorescent probes. These probes are typically small molecules, proteins, or nucleic acids that either possess intrinsic fluorescence or are linked to a fluorophore ...
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