Novel curcumin analogs to overcome EGFR-TKI lung adenocarcinoma drug resistance and reduce EGFR-TKI-induced GI adverse effects.

Abstract:

:Curcumin (1) down-regulates the expression as well as phosphorylation of epidermal growth factor receptor (EGFR) in lung adenocarcinoma cells expressing gefitinib-resistant EGFR. Thirty-seven newly synthesized curcumin analogues including dimethoxycurcumin (2, DMC) were evaluated for their effects on EGFR expression as well as phosphorylation in two gefitinib-resistant lung adenocarcinoma cell lines, CL1-5 (EGFR(wt)) and H1975 (EGFR(L858R+T790M)). Based on the identified structure-activity relationships, methoxy substitution at C-3', C-4', or both positions favored inhibitory activity (compounds 1, 2, 5, 8-15, 17, 36), while compounds with more polar substituents were generally less active in both cell lines. Compound 36 with a fluorine substituent at C-6' and its protonated counterpart 2 did not lose activity, suggesting halogen tolerance. In addition, a conjugated linker was essential for activity. Among all evaluated curcumin derivatives, compound 2 showed the best inhibitory effects on both wild-type and mutant EGFR by efficiently inducing gefitinib-insensitive EGFR degradation. Compound 23 also reduced gefitinib-induced gastrointestinal damage in the non-transformed intestinal epithelial cell line IEC-18.

journal_name

Bioorg Med Chem

authors

Wada K,Lee JY,Hung HY,Shi Q,Lin L,Zhao Y,Goto M,Yang PC,Kuo SC,Chen HW,Lee KH

doi

10.1016/j.bmc.2015.02.003

subject

Has Abstract

pub_date

2015-04-01 00:00:00

pages

1507-1514

issue

7

eissn

0968-0896

issn

1464-3391

pii

S0968-0896(15)00087-5

journal_volume

23

pub_type

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