Document Type : Original Articles
Authors
1
Department of Natural and Life Sciences, Faculty of Sciences, University Algiers 1 BenYoucef Benkhedda ,Algiers, Algeria
2
Department of Natural and Life Sciences, Faculty of Sciences, University Algiers 1 BenYoucef Benkhedda, Algiers, Algeria
3
2Bioinformatics, Applied Microbiology and Biomolecules Laboratory, Faculty of Sciences, University of M'Hamed Bougara of Boumerdès. Algeria
10.22092/ari.2024.366213.3204
Abstract
The first cancer to strike a community is breast cancer. Because of its extremely high mitotic activity, breast cancer that tests positive for HER 2 is thought to have a bad prognosis. Due to the effects caused by chemical drugs, patients are increasingly turning to natural medicine, such as phytotherapy and nutritherapy. The main objective of this study is to search, using a bioinformatics approach (molecular docking), for new non-toxic anti-cancer inhibitors by carrying out a screening of 102 ligands from natural and dietary compounds, likely to interact with the HER-2.The results of the virtual screening permit to choose 23 best compounds which can be proposed as the best inhibitors of HER-2. Lycopene would be a very promising ligand which presents a DeltaG of -9.82 kcal/mol, followed by Beta-carotene (DeltaG of -8.58), P-cumaric acid kcal/mol (DeltaG of -8.57) and Curcumin (DeltaG of -8.46). Another compounds; luteolin, anacardium (Anacardic acid) and alpha-Tocopherol were found to have the strongest inhibitory effects, with DeltaG values of -7.92 kcal/mol, -7.89 kcal/mol and-7.85 kcal/mol, respectively, and act directly on residues keys found in the hydrophobic pocket II (ATP binding site) and the hydrophobic region (the αC-β4 loop) of the EGFR domain. Pinoresino, Kaempferol and Caffeic acid with DeltaGs of -7.48 Kcal/mol, -6.88 Kcal/mol and -6.34 kcal/mol, and are three ligands specific to the conserved regions of the HER-2 receptor and interact with the tail respectively; C-terminal, the C-lobe activation loop and the N-lobe P loop of the tyrosine kinase domain. The comparison of Lapatinib (chemical compound) and quercetin (natural compound) have respectively DeltaG of -7.58 kcal/mol and -7.28 kcal/mol, form a hydrogen bond with the same residue of the hydrophobic region. All the natural molecules seem very promising and, after in vitro/in vivo tests, could constitute good substitutes for the chemotherapies currently used to treat breast cancers as well as other cancers.
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