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Quantitative Structure-cytotoxicity Relationship of 3-Benzylidenechromanones
Yoshihiro Uesawa1, Hiroshi Sakagami2, Hajime Kagaya3
1Department of Clinical Pharmaceutics, Meiji Pharmaceutical University, Kiyose, Japan uesawa@my-pharm.ac.jp.
Aim:
Sixteen 3-benzylidenechromanones were subjected to quantitative structure-activity relationship (QSAR) analysis based on their cytotoxicity and tumor-specificity, in order to examine their new biological activities.
Materials And Methods:
Cytotoxicity against two human oral squamous cell carcinoma cell lines, two mesenchymal and two epithelial normal oral cells, was determined by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method. Tumor-specificity (TS) was evaluated by the ratio of the mean CC50 (50% cytotoxic concentration) against normal cells to that against tumor cell lines. Physicochemical, structural and quantum-chemical parameters were calculated based on the conformations optimized by the LowModeMD method.
Results:
3-Benzylidenechromanone derivatives that have a methoxy group at 7-position of the chromanone ring and hydroxyl or methoxy group at 4'-position of benzene ring showed relatively higher TS values, exceeding those of doxorubicin (DXR) and 5-fluorouracil (5-FU). Since these anticancer drugs were highly cytotoxic to normal keratinocytes, QSAR analysis was performed with oral carcinoma and mesenchymal normal cells. Tumor-specificity was well correlated with 3D-MoRSE descriptors (that relate to three dimensional shapes) and Edge adjacency indices (that relate to two dimensional shapes and polarization). Introduction of hydroxyl group at 3'-position of benzene ring significantly elevated the tumor-specificity.
Conclusion:
Molecular shape, size and polarization are useful markers for the evaluation of tumor-specificity of 3-benzylidenechromanone derivatives.
Insights
Quantitative structure-activity relationship (QSAR) analysis of 3-benzylidenechromanones revealed that molecular shape and polarization are key for tumor-specificity. Certain derivatives showed higher tumor-specificity than doxorubicin and 5-fluorouracil.
Area of Science:
- Medicinal Chemistry
- Computational Chemistry
- Pharmacology
Background:
- 3-Benzylidenechromanones are investigated for potential anticancer activities.
- Understanding structure-activity relationships is crucial for developing targeted cancer therapies.
- Cytotoxicity and tumor-specificity are key parameters for evaluating anticancer drug candidates.
Purpose of the Study:
- To perform a quantitative structure-activity relationship (QSAR) analysis on 3-benzylidenechromanones.
- To evaluate the cytotoxicity and tumor-specificity of these compounds against oral cancer cell lines and normal oral cells.
- To identify structural features that enhance tumor-specificity.
Main Methods:
- Cytotoxicity was assessed using the MTT assay against human oral squamous cell carcinoma lines and normal oral cells.
- Tumor-specificity (TS) was calculated as the ratio of CC50 values for normal cells versus tumor cells.
- Physicochemical, structural, and quantum-chemical parameters were computed using the LowModeMD method.
Main Results:
- Derivatives with a 7-methoxy group and a 4'-hydroxyl or methoxy group exhibited high TS, outperforming doxorubicin and 5-fluorouracil.
- QSAR analysis indicated that 3D-MoRSE descriptors and Edge adjacency indices correlated well with tumor-specificity.
- Adding a hydroxyl group at the 3'-position of the benzene ring significantly increased tumor-specificity.
Conclusions:
- Molecular shape, size, and polarization are important indicators for assessing the tumor-specificity of 3-benzylidenechromanone derivatives.
- These findings can guide the design of novel anticancer agents with improved tumor-targeting capabilities.
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