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Published in: BMC Cancer 1/2016

Open Access 01-12-2016 | Research article

p53-independent structure-activity relationships of 3-ring mesogenic compounds’ activity as cytotoxic effects against human non-small cell lung cancer lines

Authors: Saori Fukushi, Hironori Yoshino, Atsushi Yoshizawa, Ikuo Kashiwakura

Published in: BMC Cancer | Issue 1/2016

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Abstract

Background

We recently demonstrated the cytotoxicity of liquid crystal precursors (hereafter referred to as “mesogenic compounds”) in the human non-small cell lung cancer (NSCLC) cell line A549 which carry wild-type p53. p53 mutations are observed in 50 % of NSCLC and contribute to their resistance to chemotherapy. To develop more effective and cancer-specific agents, in this study, we investigated the structure–activity relationships of mesogenic compounds with cytotoxic effects against multiple NSCLC cells.

Methods

The pharmacological effects of mesogenic compounds were examined in human NSCLC cells (A549, LU99, EBC-1, and H1299) and normal WI-38 human fibroblast. Analyses of the cell cycle, cell-death induction, and capsases expression were performed.

Results

The 3-ring compounds possessing terminal alkyl and hydroxyl groups (compounds C1–C5) showed cytotoxicity in NSCLC cells regardless of the p53 status. The compounds C1 and C3, which possess a pyrimidine at the center of the core, induced G2/M arrest, while the compounds without a pyrimidine (C2, C4, and C5) caused G1 arrest; all compounds produced caspase-mediated cell death. These events occurred in a p53-independent manner. Furthermore, it was suggested that compounds induced cell death through p53-independent DNA damage-signaling pathway. Compounds C2, C4, and C5 did not show strong cytotoxicity in WI-38 cells, whereas C1 and C3 did. However, the cytotoxicity of compound C1 against WI-38 cells was improved by modulating the terminal alkyl chain lengths of the compound.

Conclusions

We showed the p53-indepdent structure–activity relationships of mesogenic compounds related to the cytotoxic effects. These structure–activity relationships will be helpful in the development of more effective and cancer-specific agents.
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Metadata
Title
p53-independent structure-activity relationships of 3-ring mesogenic compounds’ activity as cytotoxic effects against human non-small cell lung cancer lines
Authors
Saori Fukushi
Hironori Yoshino
Atsushi Yoshizawa
Ikuo Kashiwakura
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2016
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-016-2585-6

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