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排序方式: 共有165条查询结果,搜索用时 29 毫秒
41.
Brownscombe Jacob W. Lédée Elodie J. I. Raby Graham D. Struthers Daniel P. Gutowsky Lee F. G. Nguyen Vivian M. Young Nathan Stokesbury Michael J. W. Holbrook Christopher M. Brenden Travis O. Vandergoot Christopher S. Murchie Karen J. Whoriskey Kim Mills Flemming Joanna Kessel Steven T. Krueger Charles C. Cooke Steven J. 《Reviews in Fish Biology and Fisheries》2019,29(2):369-400
Reviews in Fish Biology and Fisheries - Telemetry is an increasingly common tool for studying the ecology of wild fish, with great potential to provide valuable information for management and... 相似文献
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Mary Struthers Thomas Wisniewski Melissa Precopio Zhenhua Sun Ireneusz Nowak Dong Yu Ekambar R. Kandimalla Danilo R. Casimiro 《Cellular immunology》2010,263(1):105-6468
Novel agonists of TLR9 with two 5′-ends and synthetic immune stimulatory motifs, referred to as immune modulatory oligonucleotides (IMOs) are potent agonists of TLR9. In the present study, we have designed and synthesized 15 novel IMOs by incorporating specific chemical modifications and studied their immune response profiles both in vitro and in vivo. Analysis of the immunostimulatory profiles of these IMOs in human and NHP cell-based assays suggest that changes in the number of synthetic immunostimulatory motifs gave only a subtle change in immune stimulation of pDCs as indicated by IFN-α production and pDC maturation while the addition of self-complementary sequences produced more dramatic changes in both pDC and B cell stimulation. All IMOs induced cytokine production in vivo immediately after administration in mice. Representative compounds were also compared for the ability to stimulate cytokine production in vivo (IFN-α and IP-10) in rhesus macaques after intra-muscular administration. 相似文献
44.
CC chemokine receptor 7 (CCR-7) is expressed on mature dendritic cells and T-cells. Its ligands, CCL-19 (MIP-3beta) and CCL-21 (SLC), play an important role in the migration of these cells to secondary lymphoid organs where they are predominantly expressed. For most chemokines, the N-terminal domain preceding the first two conserved cysteines is involved in stabilizing the active conformation of its cognate receptors. We have chemically synthesized N-terminal analogues of CCL-19 with the aid of a native chemical ligation method to investigate structure function requirements of this ligand domain by performing ligand binding, GTP-gammaS binding, and chemotaxis assays. Successive truncations of the N-terminus of CCL-19 reduced the affinity of the receptor for the ligand in a size-dependent manner. Furthermore, Ala substitutions of Asn(3), Asp(4), and Asp(7) show that the side chains of these residues are important for high-affinity binding of CCL-19 to CCR-7. The effects observed were mirrored in both GTP-gammaS binding and chemotaxis assays, highlighting the functional importance of this ligand domain. We also describe two partial agonists of CCR-7 ([Nle(72)]CCL-19(6-77) and Ac-[Nle(72)]CCL-19(7-77)), and identify the first analogue of CCL-19 (Ac-[Nle(72)]CCL-19(8-77)) that acts as a functional antagonist in vitro (K(B) approximately 350 nM for GTP-gammaS binding assays). As mutations of both Glu(6) and Asp(7) to Ala did not dissociate effects on ligand binding from receptor activation, it is likely that the backbone of these two residues is crucial for agonist activity. 相似文献
45.
Guo Z Chen Y Wu D Zhu YF Struthers RS Saunders J Xie Q Chen C 《Bioorganic & medicinal chemistry letters》2003,13(20):3617-3622
The synthesis and SAR studies of thieno[2,3-d]pyrimidine-2,4-diones as human GnRH receptor antagonists to treat reproductive diseases are discussed. It was found that the 2-(2-pyridyl)ethyl group on the 5-aminomethyl functionality of the core structure was a key feature for good receptor binding activity. SAR study of the 6-(4-aminophenyl) group suggests that hydrophobic substituents were preferred. The best compound from this series had binding affinity (K(i)) of 0.4 nM to the human GnRH receptor. 相似文献
46.
Guo Z Zhu YF Tucci FC Gao Y Struthers RS Saunders J Gross TD Xie Q Reinhart GJ Chen C 《Bioorganic & medicinal chemistry letters》2003,13(19):3311-3315
The novel synthesis and SAR studies of 6-methyluracils as human GnRH receptor antagonists are discussed. Introduction of a small methyl substituent at the beta-position from N3 of the uracil improved the GnRH binding potency by 5- to 10-fold. The best compound from the series had binding affinity of 5 nM (K(i)) to the human GnRH receptor. 相似文献
47.
Zhu YF Struthers RS Connors PJ Gao Y Gross TD Saunders J Wilcoxen K Reinhart GJ Ling N Chen C 《Bioorganic & medicinal chemistry letters》2002,12(3):399-402
Initial SAR studies on 1-aminomethyl-2-aryl-3-cyano-pyrrolo[1,2-a]pyrimid-7-one-6-carboxylates as human GnRH receptor antagonists were discussed. 2-(2-Methylaminoethyl)pyridine was discovered to be a key feature for generating active compounds. The best compound from the series had 25 nM (K(i)) binding affinity to human GnRH receptor. 相似文献
48.
Rowbottom MW Tucci FC Connors PJ Gross TD Zhu YF Guo Z Moorjani M Acevedo O Carter L Sullivan SK Xie Q Fisher A Struthers RS Saunders J Chen C 《Bioorganic & medicinal chemistry letters》2004,14(19):4967-4973
The synthesis of a series of (R)-3-[2-(2-amino)phenethyl]-1-(2,6-difluorobenzyl)-6-methyluracils containing a substituted thiophene or thiazole at C-5 is described. SAR around C-5 of the uracil led to the discovery that a 2-thienyl or (2-phenyl)thiazol-4-yl group is required for optimal receptor binding. The best compound from the series had a binding affinity of 2 nM (K(i)) for the human GnRH receptor. A novel and convenient preparation of N-1-(2,6-difluorobenzyl)-6-methyluracil is also described. 相似文献
49.
Rowbottom MW Tucci FC Zhu YF Guo Z Gross TD Reinhart GJ Xie Q Struthers RS Saunders J Chen C 《Bioorganic & medicinal chemistry letters》2004,14(9):2269-2274
The synthesis of a series of (R)-1-alkyl-3-[2-(2-amino)phenethyl]-5-(2-fluorophenyl)-6-methyluracils is discussed. SAR around N-1 of the uracil was explored, which led to the discovery that an electron-deficient 2,6-disubstituted benzyl group is required for optimal receptor binding. The best compound from the series had binding affinity of 0.7 nM (K(i) for the human GnRH receptor, which was 8-fold better than the 2,6-difluorobenzyl analog. 相似文献
50.