Title:Design, Synthesis, and Biological Evaluation of Some Novel Retinoid Derivatives
Volume: 21
Issue: 14
Author(s): Dilan Konyar*, Egemen Foto, Fatma Zilifdar Foto and Mehmet Erdem Buyukbingol
Affiliation:
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Dicle University, Sur, Diyarbakir, 21280, Turkey
Keywords:
Bexarotene, cytotoxicity, anticancer, hybrid molecules, retinoid, RXRa.
Abstract:
Background: As cancer stands as a significant global health concern, many heterocyclic
compounds that are more effective in cancer cells than healthy cells are being investigated for their selective
anticancer potentials. One such compound is fenretinide, a synthetic derivative of retinoic acid
that has a broad spectrum of cytotoxic activity against primary tumor cells, cell lines, and/or xenografts
of various cancers. In this context, bexarotene and its derivatives, synthesized from hybridization of the
fenretinide, are expected to possess a potential anticancer activity.
Objective: The objective of the present study was to investigate the synthesis of novel amid-derived and
bexarotene-based compounds, as well as to assess their cytotoxic effects in different cancer cell lines.
Methods: This study involved the synthesis of twelve novel retinoid derivatives (6-17) in a six-step
process. The cytotoxic activities of these compounds were assessed against various cancer cell lines,
such as A549 (human lung carcinoma), HeLa (human cervical cancer), MCF7 (human breast adenocarcinoma),
and WiDr (human colon adenocarcinoma). The chemical structures of these compounds were
elucidated through their elemental analysis, mass spectrometry (ESI+, ESI-), as well as 1H-NMR and
13C-NMR spectroscopic data.
Results: The obtained cell toxicity results indicated that compounds 6, 8, 11, 12, 13, 14, and 17 were
found to exhibit the strongest cytotoxic activity in above mentioned cancer cell lines. The IC50 values
for active compounds, 11 and 12, were determined as 2.38μM and 2.29μM, respectively. Remarkably,
these compounds displayed higher cytotoxic activity in the WiDr cell line related to positive control,
camptothecin (CPT). Moreover, compounds 14 and 17 demonstrated very similar level of cytotoxic
activity to CPT, indicating their potential for antitumoral applications upon further studies.
Conclusion: While compounds 11, 12, 14, and 17 indicated a very comparable anticancer activity to
CPT, compounds 6, 8, 11 and 12 showed more selective anticancer effect against cancer cells than noncancerous
cells. In accordance with the findings of the present study, they can be evaluated as primary
candidates for further studies, specifically as RXRα-targeted anticancer agents.