Abstract
In recent years, impairing mitochondria in cancer cells gained attention as alternative cancer therapy. In this context, non-steroidal anti-inflammatory (NSAID) drugs are interesting candidates to damage mitochondria in cancer cells. However, routing NSAIDs specifically into the mitochondria remained a major challenge and less explored. Herein, we have synthesized a small library of Meclofenamic acid and Naproxen derivatives having ester and amide linkage with substituted triphenylphosphonium cations for mitochondria targeting. Screening in cervical cancer (HeLa), breast cancer (MCF7) and colon cancer (HCT-116) cells revealed a Meclofenamic acid derivative having ester linkage with tri (4-methoxyphenyl) phosphonium cation (8A3) which induced mitochondrial damage through mitochondrial outer membrane permeabilization (MOMP) followed by generation of reactive oxygen species (ROS) in the HCT-116 cells. This 8A3-mediated mitochondrial impairment triggered apoptosis by inhibiting Cox-2, reduction in Bcl-2/Bcl-xl expression and Caspase-3/9 cleavage leading to remarkable HCT-116 cell death. This novel mitochondrion targeted Meclofenamic acid derivative has the potential to be used as a chemical biology tool to understand the role of NSAIDs in mitochondria towards cancer therapy.
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