Li YX

References (5)

Title : Discovery and synthesis of tetrahydropyrimidinedione-4-carboxamides as endothelial lipase inhibitors - Hu_2018_Bioorg.Med.Chem.Lett_28_3721
Author(s) : Hu CH , Wang TC , Qiao JX , Haque L , Chen AYA , Taylor DS , Ying X , Onorato JM , Galella M , Shen H , Huang CS , Toussaint N , Li YX , Abell L , Adam LP , Gordon D , Wexler RR , Finlay HJ
Ref : Bioorganic & Medicinal Chemistry Lett , 28 :3721 , 2018
Abstract : Endothelial lipase (EL) inhibitors have been shown to elevate HDL-C levels in pre-clinical murine models and have potential benefit in prevention and treatment of cardiovascular diseases. Modification of the 1-ethyl-3-hydroxy-1,5-dihydro-2H-pyrrol-2-one (DHP) lead, 1, led to the discovery of a series of potent tetrahydropyrimidinedione (THP) EL inhibitors. Synthesis and SAR studies including modification of the amide group, together with changes on the pyrimidinone core led to a series of arylcycloalkyl, indanyl, and tetralinyl substituted 5-amino or 5-hydroxypyrimidinedione-4-carboxamides. Several compounds were advanced to PK evaluation. Among them, compound 4a was one of the most potent with measurable EL(HDL) hSerum potency and compound 3g demonstrated the best overall pharmacokinetic parameters.
ESTHER : Hu_2018_Bioorg.Med.Chem.Lett_28_3721
PubMedSearch : Hu_2018_Bioorg.Med.Chem.Lett_28_3721
PubMedID: 30348490

Title : Optimization of Activity, Selectivity, and Liability Profiles in 5-Oxopyrrolopyridine DPP4 Inhibitors Leading to Clinical Candidate (Sa)-2-(3-(Aminomethyl)-4-(2,4-dichlorophenyl)-2-methyl-5-oxo-5H-pyrrolo[3,4-b]py ridin-6(7H)-yl)-N,N-dimethylacetamide (BMS-767778) - Devasthale_2013_J.Med.Chem_56_7343
Author(s) : Devasthale P , Wang Y , Wang W , Fevig J , Feng J , Wang A , Harrity T , Egan D , Morgan N , Cap M , Fura A , Klei HE , Kish K , Weigelt C , Sun L , Levesque P , Moulin F , Li YX , Zahler R , Kirby MS , Hamann LG
Ref : Journal of Medicinal Chemistry , 56 :7343 , 2013
Abstract : Optimization of a 5-oxopyrrolopyridine series based upon structure-activity relationships (SARs) developed from our previous efforts on a number of related bicyclic series yielded compound 2s (BMS-767778) with an overall activity, selectivity, efficacy, PK, and developability profile suitable for progression into the clinic. SAR in the series and characterization of 2s are described.
ESTHER : Devasthale_2013_J.Med.Chem_56_7343
PubMedSearch : Devasthale_2013_J.Med.Chem_56_7343
PubMedID: 23964740
Gene_locus related to this paper: human-DPP4

Title : 7-Oxopyrrolopyridine-derived DPP4 inhibitors-mitigation of CYP and hERG liabilities via introduction of polar functionalities in the active site - Wang_2011_Bioorg.Med.Chem.Lett_21_6646
Author(s) : Wang W , Devasthale P , Wang A , Harrity T , Egan D , Morgan N , Cap M , Fura A , Klei HE , Kish K , Weigelt C , Sun L , Levesque P , Li YX , Zahler R , Kirby MS , Hamann LG
Ref : Bioorganic & Medicinal Chemistry Lett , 21 :6646 , 2011
Abstract : Design, synthesis, and SAR of 7-oxopyrrolopyridine-derived DPP4 inhibitors are described. The preferred stereochemistry of these atropisomeric biaryl analogs has been identified as Sa. Compound (+)-3t, with a K(i) against DPP4, DPP8, and DPP9 of 0.37 nM, 2.2, and 5.7 muM, respectively, showed a significant improvement in insulin response after single doses of 3 and 10 mumol/kg in ob/ob mice.
ESTHER : Wang_2011_Bioorg.Med.Chem.Lett_21_6646
PubMedSearch : Wang_2011_Bioorg.Med.Chem.Lett_21_6646
PubMedID: 21996520
Gene_locus related to this paper: human-DPP4

Title : Simple determination of huperzine A in human plasma by liquid chromatographic-tandem mass spectrometric method - Li_2007_Biomed.Chromatogr_21_15
Author(s) : Li YX , Jiang XH , Lan K , Wang L
Ref : Biomedical Chromatography , 21 :15 , 2007
Abstract : Huperzine A is a potent, reversible acetylcholinesterase inhibitor. In the present work, a rapid and sensitive LC-MS-MS method for the determination of huperzine A in human plasma using codeine phosphate as internal standard has been developed and validated. The analyte and internal standard were extracted from plasma using ethyl acetate, chromatographed on a C(18) column (5 microm, 150 x 4.6 mm i.d.) with a mobile phase consisting of 1% formic acid-methanol (40:60, v/v), and detected using a tandem mass spectrometer with a TurboIonSpray ionization interface. The run time was only 2 min. Good linearity was achieved in the range 0.126 -25.2 ng/mL and the limit of detection in plasma was 0.064 ng/mL. The average recovery for huperzine A was 83.4% from plasma. The analytical sensitivity and accuracy of this assay is adequate for characterization of huperzine A in human plasma.
ESTHER : Li_2007_Biomed.Chromatogr_21_15
PubMedSearch : Li_2007_Biomed.Chromatogr_21_15
PubMedID: 17080497

Title : Double-stranded RNA injection produces null phenotypes in zebrafish - Li_2000_Dev.Biol_217_394
Author(s) : Li YX , Farrell MJ , Liu R , Mohanty N , Kirby ML
Ref : Developmental Biology , 217 :394 , 2000
Abstract : Zebrafish is a simple vertebrate that has many attributes that make it ideal for the study of developmental genetics. One feature that has been lacking in this model system is the ability to disable specifically targeted genes. Recently, double-stranded RNA has been used to silence gene expression in the nematode Caenorhabditis elegans. We have found that expression of the green fluorescent protein (GFP) from a microinjected plasmid vector can be suppressed in zebrafish embryos by the coinjection of a double-stranded RNA that is specifically targeted to GFP. To determine that double-stranded RNA can attenuate endogenous gene expression, single-cell zebrafish embryos were injected with double-stranded RNA specifically targeted to Zf-T and Pax6.1. We found that microinjection of double-stranded Zf-T RNA resulted in a high incidence of a phenotype similar to that of ntl. Furthermore, Zf-T gene expression could not be detected by in situ hybridization and the message was decreased by 75% by semiquantitative RT-PCR in 12-h embryos that had been injected with the double-stranded RNA. Expression of the zebrafish genes sonic hedgehog and floating head was altered in the embryos microinjected with the Zf-T double-stranded RNA in a manner that is remarkably similar to the zebrafish no-tail mutant. Microinjection of double-stranded RNA targeted to Pax6.1 was associated with depressed expression of Pax6. 1 and resulted in absent or greatly reduced eye and forebrain development, similar to the phenotype seen in mouse mutants. Simultaneous injection of Pax6.1 and Zf-T resulted in embryos lacking notochords, eyes, and brain structures.
ESTHER : Li_2000_Dev.Biol_217_394
PubMedSearch : Li_2000_Dev.Biol_217_394
PubMedID: 10625563