Design, Synthesis, and Bioevaluation of 2-Aminopteridin-7(8<i>H</i>)-one Derivatives as Novel Potent Adenosine A<sub>2A</sub> Receptor Antagonists for Cancer Immunotherapy
作者:Fazhi Yu、Chenyu Zhu、Shuyin Ze、Haojie Wang、Xinyu Yang、Mingyao Liu、Qiong Xie、Weiqiang Lu、Yonghui Wang
DOI:10.1021/acs.jmedchem.1c02199
日期:2022.3.10
In recent years, the adenosineA2Areceptor (A2AR) has shown exciting progress in the development of immunotherapies for the treatment of cancer. Herein, a 2-amino-7,9-dihydro-8H-purin-8-one compound (1) was identified as an A2AR antagonist hit through in-house library screening. Extensive structure–activity relationship (SAR) studies led to the discovery of 2-aminopteridin-7(8H)-one derivatives, which
近年来,腺苷A 2A受体(A 2A R) 在用于治疗癌症的免疫疗法的开发中显示出令人兴奋的进展。在此,一种2-氨基-7,9-二氢-8H-嘌呤-8-酮化合物( 1 )通过内部文库筛选被鉴定为A 2AR拮抗剂。广泛的构效关系 (SAR) 研究导致发现了 2-氨基蝶啶-7(8 H )-one 衍生物,该衍生物在 cAMP 测定中显示出对 A 2A R 的高效力。化合物57在 5'- N处对 A 2A R的 IC 50值为 8.3 ± 0.4 nM-乙基羧酰胺腺苷 (NECA) 水平为 40 nM。即使在 1 μM 的较高 NECA 浓度下, 57的拮抗作用也能持续,这模拟了肿瘤微环境 (TME) 中的腺苷水平。重要的是,57在 IL-2 产生测定和癌细胞杀伤模型中均增强了 T 细胞活化,从而证明了其作为在癌症免疫治疗中开发新型 A 2AR拮抗剂的先导潜力。
Triazolopyrimidines and related analogs as HSP90-inhibitors
申请人:Kasibhatla Rao Srinivas
公开号:US20050113339A1
公开(公告)日:2005-05-26
Triazolopyrimidines and related compounds are described and demonstrated or predicted to have utility as Heat Shock Protein 90 (HSP90) inhibiting agents in the treatment and prevention of various HSP90 mediated disorders, e.g., proliferative disorders. Method of synthesis and use of such compounds are also described and claimed.
Heterobicyclic compounds of formula I are described and demonstrated to have utility as Heat Shock Protein 90 (HSP90) inhibiting agent. Method of synthesis and use of such compounds are also described.
描述并证明了式 I 的杂双环化合物作为热休克蛋白 90(HSP90)抑制剂的实用性。还描述了合成和使用此类化合物的方法。
Synthesis and in vitro evaluation of novel 2,6,9-trisubstituted purines acting as cyclin-dependent kinase inhibitors
Novel C-2, C-6, N-9 trisubstituted purines derived from the olomoucine/roscovitine lead structure were synthesized and evaluated for their ability to inhibit starfish oocyte CDK1/cyclin B, neuronal CDK5/p35 and erk1 kinases in purified extracts. Structure-activity relationship studies showed that increased steric bulk at N-9 reduces the inhibitory potential whereas substitution of the aminoethanol C-2 side chain by various groups of different size (methyl, propyl, butyl, phenyl, benzyl) only slightly decreases the activity when compared to (R)-roscovitine. Optimal inhibitory activity against CDK5, CDK1 and CDK2, with IC50 values of 0.16, 0.45 and 0.65 mu M, respectively, was obtained with compound 21 containing a (2R)-pyrrolidin-2-yl-methanol substituent at the C-2 and a 3-iodobenzylamino group at the C-6 of the purine. Compound 21 proved cytotoxic against human tumor HeLa cells (LD50 = 6.7 mu M versus 42.7 mu M for olomoucine, 24-h contact). Furthermore, unlike olomoucine, compound 21 was effective upon short exposure (LD50 = 25.3 mu M, 2-h contact). The available data suggest that the affinity for CDKs and the cytotoxic potential of the drugs are inter-related. However, no straightforward cell cycle phase specificity of the cytotoxic response to 21 was observed in synchronized HeLa cells. With the noticeable exception of pronounced lengthening of the S-phase transit by 21 applied during early-S in synchronized HeLa cells, and in striking contrast with earlier reports on studies using plant or echinoderm cells, olomoucine and compound 21 were unable to reversibly arrest cell cycle progression in asynchronous growing HeLa cells. Some irreversible block in G1 and G2 phase occurred at high olomoucine concentration, correlated with induced cell death. Moreover, chronic exposure to lethal doses of compound 21 resulted in massive nuclear fragmentation, evocative of mitotic catastrophe with minor amounts of apoptosis only. It was also found that olomoucine and compound 21 reversibly block the intracellular uptake of nucleosides with high efficiency. (C) 1999 Elsevier Science Ltd. All rights reserved.