- Synthesis and structure-activity relationships of 3,4,5-trisubstituted-1,2,4-triazoles: High affinity and selective somatostatin receptor-4 agonists for Alzheimer's disease treatment
-
Somatostatin receptor-4 (SST4) is highly expressed in brain regions affiliated with learning and memory. SST4 agonist treatment may act to mitigate Alzheimer's disease (AD) pathology. An integrated approach to SST4 agonist lead optimization is presented herein. High affinity and selective agonists with biological efficacy were identified through iterative cycles of a structure-based design strategy encompassing computational methods, chemistry, and preclinical pharmacology. 1,2,4-Triazole derivatives of our previously reported hit (4) showed enhanced SST4 binding affinity, activity, and selectivity. Thirty-five compounds showed low nanomolar range SST4 binding affinity, 12 having a Ki 500-fold affinity for SST4 as compared to SST2A. SST4 activities were consistent with the respective SST4 binding affinities (EC50 600-fold selectivity over SST2A) display a favorable physiochemical profile, and was advanced to learning and memory behavior evaluations in the senescence accelerated mouse-prone 8 model of AD-related cognitive decline. Chronic administration enhanced learning with i.p. dosing (1 mg kg-1) compared to vehicle. Chronic administration enhanced memory with both i.p. (0.01, 0.1, 1 mg kg-1) and oral (0.01, 10 mg kg-1) dosing compared to vehicle. This study identified a novel series of SST4 agonists with high affinity, selectivity, and biological activity that may be useful in the treatment of AD. This journal is
- Crider, A. Michael,Farr, Susan A.,Frare, Rafael,Hospital, Audrey,Kontoyianni, Maria,Kukielski, Stephen G.,Minaeian, Mahsa,Mobayen, Shirin,Neumann, William L.,Niehoff, Michael L.,Sandoval, Karin E.,Slater, Olivia,Srabony, Khush N.,Witt, Ken A.
-
p. 1352 - 1365
(2021/11/09)
-
- Microwave-Assisted Synthesis, Antimicrobial Activity, and SAR Study of 3-(2-Chlorobenzyl)-6-(Substituted Phenyl)-7H-[1,2,4]Triazolo[3,4-b][1,3,4]Thiadiazines
-
Abstract: An efficient, simple, and greener method has been described for the synthesis of 3-(2-chlorobenzyl)-6-(substituted phenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines by using microwave irradiations. The one-pot reaction between 4-amino-5-(2-chlorobenzyl)-4H-1,2,4-triazole-3-thiol and various phenacyl bromide in the presence of reusable catalyst DABCO and EtOH solvents to give the desired products. We have discovered different organic compounds as antimicrobial agents and study for their structure-activity relationships (SAR). The antimicrobial screening shows moderate activities against used microbes.
- Joshi, Hitendra S.,Kalavadiya, Prakash L.,Tejal, D. Bhatt
-
supporting information
p. 1105 - 1113
(2021/10/26)
-
- Expedient discovery for novel antifungal leads: 1,3,4-Oxadiazole derivatives bearing a quinazolin-4(3H)-one fragment
-
Developing novel fungicide candidates are intensively promoted by the rapid emergences of resistant fungi that outbreak on agricultural production. Aiming to discovery novel antifungal leads, a series of 1,3,4-oxadiazole derivatives bearing a quinazolin-4(3H)-one fragment were constructed for evaluating their inhibition effects against phytopathogenic fungi in vitro and in vivo. Systematically structural optimizations generated the bioactive molecule I32 that was identified as a promising inhibitor against Rhizoctonia solani with the in vivo preventative effect of 58.63% at 200 μg/mL. The observations that were captured by scanning electron microscopy and transmission electron microscopy demonstrated that the bioactive molecule I32 could induce the sprawling growth of hyphae, the local shrinkage and rupture on hyphal surfaces, the extreme swelling of vacuoles, the striking distortions on cell walls, and the reduction of mitochondria numbers. The above results provided an indispensable complement for the discovery of antifungal lead bearing a quinazolin-4(3H)-one and 1,3,4-oxadiazole fragment.
- Chai, Jianqi,Chen, Min,Jin, Fei,Kong, Xiangyi,Wang, Xiaobin,Xue, Wei,Yang, Chunlong
-
-
- 3,4,5-TRISUBSTITUTED-1,2,4-TRIAZOLES AND 3,4,5-TRISUBSTITUTED-3-THIO-1,2,4-TRIAZOLES AND USES THEREOF
-
The present disclosure describes novel compounds that are somatostatin receptor type 4 agonists.
- -
-
Paragraph 0158; 0193; 0196
(2018/12/02)
-
- Synthesis and Biological Evaluation of New (-)-Gossypol-Derived Schiff Bases and Hydrazones
-
A series of 14 new (-)-gossypol Schiff bases and hydrazones have been synthesized via an in situ procedure in high yields. Structural data showed that all target compounds exist as the enamine tautomer. Bioassays showed that several compounds exhibited cytotoxic effects against three human cancer cell lines. Compound 8a showed the greatest cytotoxic effect against hepatocellular carcinoma (HepG2), lung carcinoma (LU-1), and breast cancer (MCF-7) cell lines with IC50 values of 20.93, 13.58, and 9.40 μM, respectively. However, in an antibacterial test, compounds 8a and 8b inhibited Staphylococcus aureus and Bacillus cereus and compound 8e inhibited only Staphylococcus aureus at the same MIC values of 1024 μg/ml.
- Vu, Vu Van,Nhung, Trinh Thi,Thanh, Nguyen Thi,Chinh, Luu Van,Tien, Vu Dinh,Thuy, Vu Thu,Thi Thao, Do,Nam, Nguyen Hai,Koeckritz, Angela,Vu, Tran Khac
-
-
- Asymmetric Synthesis and Antitumor Activity of Spiro-Oxadiazole Derivatives from 1,4:3,6-Dianhydro-D-fructose
-
A series of spiro-oxadiazoles were synthesized from 1,4:3,6-dianhydro-D-fructose and hydrazides via a stereo- selective two-step reaction sequence. The structures of newly synthesized compounds were established by spectral analysis. The absolute configuration of compound 2a was further confirmed by single crystal X-ray analysis. All the synthesized compounds were screened for their in vitro antitumor activity, showing that these compounds have poor inhibitory activities against A549, MGC-803 tumor cells.
- Xu, Wenke,Ge, Yongxun,Hou, Yu,Liu, Yingju,Hua, Yingchun,Han, Weiwei,Qin, Zhiyan,Liu, Fengwu
-
p. 1437 - 144
(2017/10/06)
-
- Thiadiazole-based Thioglycosides as Sodium-glucose Co-transporter 2 (SGLT2) Inhibitors
-
A series of thiadiazole-based thioglycosides were synthesized as SGLT2 inhibitors from D-glucose, D-galactose and a variety of phenylacetic acids via a convenient protocol in 8 steps and evaluated in vivo with an oral glucose tolerance test (OGTT), and 5-benzyl-1,3,4-thiadiazol-2-yl 1-thio-β-D-glucopyranoside (1a) was the most efficacious to suppress the blood glucose excursion during OGTT.
- Gao, Yunlong,Zhao, Guilong,Liu, Wei,Wang, Yuli,Xu, Weiren,Wang, Jianwu
-
scheme or table
p. 605 - 612
(2010/10/19)
-