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A series of tetrandrine derivatives were designed and synthesized using Suzuki coupling reaction. Eleven targeted compounds with over 50% inhibition against HL60 and A549 human cancer cell lines at 10 μM were further evaluated for the in vitro antitumor activities by MTT or SRB assay. The biological results revealed that some compounds exhibited potent antitumor activities. Thiophene derivative 6 and acetylphenyl derivative 5 were the most active ones against HL60 and A549 cell lines, with IC50 values less than 5 μM, which thus could be considered as useful candidate for further development of new antitumor agents.  相似文献   

3.
Ten novel oleanolic acid (OA) derivatives were synthesized through modifications at positions of A ring and C-28. Inhibitory activities of the oleanolic acid derivatives against SGC7901 and A549 cell lines were evaluated and confirmed by the tetrazolium bromidesalt (MTT) assay. The lab results revealed that all these compounds displayed some antitumor activity against SGC-7901 and A-549 cell lines. Among them, II4 and II5 exhibited excellent antitumor activities against SGC7901 cells and A549 cells, compared with gefitinib. Molecular docking studies have shown that compounds II4 and II5 produce potent antitumor activities by interacting with C-kit receptor through hydrogen bonds and hydrophobic bonds.  相似文献   

4.
目的 对黄槿中6种天然倍半萜类成分进行衍生化改造,并对所得衍生物进行体外抗肿瘤活性评价,分析其构效关系。方法 选取各种芳胺对黄槿中发现的6种倍半萜成分进行席夫碱修饰,采用噻唑蓝(MTT)法考察合成的目标化合物对HeLa、HepG2和MCG-803细胞的体外抗增殖活性。结果 衍生改造了19个不同的倍半萜类衍生物,结合1H-NMR、13C-NMR、HR-MS确定其结构,其中17个衍生物首次得到。部分衍生物表现出良好的抗肿瘤活性,苄胺基团对此类骨架化合物的结构修饰能够较好地提高其抗肿瘤活性。结论 部分衍生物表现出良好的抗肿瘤活性,特别对HepG2细胞活性有较大的提高,化合物122223具有进一步研究价值。  相似文献   

5.
During the process of icogenin analog research, we obtained two cytotoxic steroids: compound 4 and compound 6 casually. Their in vitro antitumor activities were tested by the standard MTT assay. The results disclosed that compound 4 (IC50 = 3.65–6.90 μM) showed potential antitumor activities against HELA, KB cell lines and compound 6 (IC50 = 2.40–9.05 μM) showed potential antitumor activities against HELA, BGC-823, KB, A549, HCT-8 cell lines.  相似文献   

6.
Context: Dihydrotanshinone (DHT), a natural compound from Salvia miltiorrhiza Bunge (Lamiaceae), showed higher cytotoxic potential compared with other tanshinones. Its effect and mechanism on gastric cancer have not been investigated.

Objective: This study evaluates the effects of DHT on cell proliferation and apoptosis on gastric cancer cells, and elucidates its molecular mechanisms.

Materials and methods: Human gastric cancer MGC803 and SGC7901 cells were treated with various concentrations of DHT (0–15?μM) for 24 and 48?h, and cell growth was measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay. Cell apoptosis was analysed by flow cytometry and DAPI staining. Western blots were performed to investigate changes in the level of apoptosis related genes in gastric cancer cell.

Results: DHT exhibited obvious inhibition of the survival of gastric cancer cells. The IC50 values in SGC7901 and MGC803 cells were 9.14 and 5.39?μM for 24?h, respectively. Cells treated with 6?μM DHT resulted in 41.3% and 35.4% apoptotic cell fractions in SGC7901 and MGC803 cells, respectively, significantly higher than that of the control. Hallmarks of apoptosis were observed in gastric cancer cells after DHT exposure. DHT enhanced the expression levels of cleaved caspase-3, caspase-9 and poly-ADP-ribose polymerases. Furthermore, DHT increased the phosphorylation of JNK and p38 in SGC7901 and MGC803 cells.

Conclusion: DHT induced growth inhibition and apoptosis of gastric cancer cells, involving activation of caspase proteins and the JNK/p38 signaling pathway. The results indicated that DHT has a promising chemotherapeutic potential for human gastric cancer.  相似文献   

7.
Some C-benzylated flavonoids based on gericudranin A were synthesized and evaluated their cytotoxic activities for the elucidation of structure-activity relationship. 2,4,6-Trihydroxyacetophenone was converted to target molecules in 6∼7 steps via sequential protection, aldol condensation, cyclization, regioselective C-benzylation, and deprotection. The cellular growth inhibition of the synthetic C-benzylated flavonoids was investigated against sixteen human cancer cell lines. Among these compounds, 5b showed the most potent cytotoxicities against several cell lines, especially as potent as adriamycin against SNB19 cell lines with an IC50 value of 0.7 μM.  相似文献   

8.
姜黄素的体外抗癌作用及其水溶液的稳定性   总被引:30,自引:0,他引:30  
目的探讨姜黄素(curcumin,Cur)对人癌细胞株的体外作用特点及其水溶液的稳定性。方法以MTT法观察对人胃癌MGC803、人肝癌Be17402、人红白血病K562及其耐阿霉素株K562/ADM等的体外杀伤作用,并以体外活性变化为指标观察Cur水溶液的稳定性。结果Cur8.5~136.0μmol·L-1对上述细胞的IC50分别为13.0,15.9,11.7,62.6μmol·L-1;低于8.5μmol·L-1就能完全对抗41.5nmol·L-1表皮生长因子(EGF)的促增殖作用。Cur水溶液于4℃贮存3~7d体外抗癌活性明显下降。结论Cur对MGC803、Be17402、K562等有明显的杀伤作用,并能对抗EGF的促增殖作用,其水溶液稳定性较差。  相似文献   

9.
Ten lupeol dicarboxylic acid monoester derivatives as new potent antitumor agents were synthesized and evaluated for in vitro antitumor activities against A549, LAC, HepG2 and HeLa cell lines. Among them, compounds 15 showed excellent antitumor activities against all tested tumor cell lines and compounds 610 exhibited high activities against A549, HepG2 and HeLa cells, exceeded lupeol, lupanol and doxorubicin. Compound 2 displayed the highest potent antitumor activities with IC50 values of 5.78 μM against A549 cell, 2.38 μM against LAC cell, 6.14 μM against HepG2 cell and 0.00842 μM against HeLa cell.  相似文献   

10.
Eighteen novel 2,3‐diphenyl acrylonitrile derivatives bearing halogens were designed, synthesized, and evaluated for biological activity. Preliminary in vitro results indicated that the majority of the compounds with a para‐substituted halogen had considerable antiproliferative activity against five human cancer cell lines, including MGC‐803, AGS, and BEL‐7402, with IC50 values in the range of 0.46–100 μm . No significant toxic effects on the non‐cancerous human liver cell line L‐02 were observed. The selective inhibitory activities against cancer cells were significantly better than that of the control lead compound CA‐4 and CA‐4P. Particularly, potent activities were found for the derivatives of 3‐(4‐halogen phenyl)‐2‐(3,4,5‐trimethoxyphenyl)acrylonitrile, such as 5c (4‐fluoro), 5f (4‐bromo), 5h (4‐chloro), and 5k (4‐trifluoro‐ methyl), for AGS with IC50 values of 0.75 ± 0.24, 0.68 ± 0.21, 0.41 ± 0.05, and 1.49 ± 0.92 μm , respectively. The antiproliferative effects of 5f were attributed to cell‐cycle arrest in the G2/M phase, induction of cellular apoptosis, suppression of cell migration, and inhibition of cell colony formation in AGS cells.  相似文献   

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