Abstract
Background: Our research group has developed some Valproic Acid (VPA) derivatives employed as anti-proliferative compounds targeting the HDAC8 enzyme. However, some of these compounds are poorly soluble in water.
Objective: Employed the four generations of Polyamidoamine (G4 PAMAM) dendrimers as drug carriers of these compounds to increase their water solubility for further in vitro evaluation.
Methods: VPA derivatives were subjected to Docking and Molecular Dynamics (MD) simulations to evaluate their affinity on G4 PAMAM. Then, HPLC-UV/VIS, 1H NMR, MALDI-TOF and atomic force microscopy were employed to establish the formation of the drug-G4 PAMAM complexes.
Results: The docking results showed that the amide groups of VPA derivatives make polar interactions with G4 PAMAM, whereas MD simulations corroborated the stability of the complexes. HPLC UV/VIS experiments showed an increase in the drug water solubility which was found to be directly proportional to the amount of G4 PAMAM. 1H NMR showed a disappearance of the proton amine group signals, correlating with docking results. MALDI-TOF and atomic force microscopy suggested the drug-G4 PAMAM dendrimer complexes formation.
Discussion: In vitro studies showed that G4 PAMAM has toxicity in the micromolar concentration in MDAMB- 231, MCF7, and 3T3-L1 cell lines. VPA CF-G4 PAMAM dendrimer complex showed anti-proliferative properties in the micromolar concentration in MCF-7 and 3T3-L1, and in the milimolar concentration in MDAMB- 231, whereas VPA MF-G4 PAMAM dendrimer complex didn’t show effects on the three cell lines employed.
Conclusion: These results demonstrate that G4 PAMAM dendrimers are capableof transporting poorly watersoluble aryl-VPA derivate compounds to increase its cytotoxic activity against neoplastic cell lines.
Keywords: PAMAM dendrimers, breast cancer, HDAC inhibitors, molecular docking, molecular dynamics, HPLC, atomic force microscopy.
[http://dx.doi.org/10.1016/j.febslet.2010.11.002 ] [PMID: 21056563]
[http://dx.doi.org/10.1038/nature08450 ] [PMID: 19741699]
[http://dx.doi.org/10.1021/mp200329f ] [PMID: 21899343]
[http://dx.doi.org/10.1002/anie.200461346 ] [PMID: 15898057]
[http://dx.doi.org/10.1038/nrm1075 ] [PMID: 12671650]
[http://dx.doi.org/10.1074/jbc.M503134200 ] [PMID: 15831498]
[http://dx.doi.org/10.1155/2011/875824] [PMID: 21076528]
[http://dx.doi.org/10.4155/fmc.12.3 ] [PMID: 22416777]
[http://dx.doi.org/10.1016/j.pharmthera.2014.04.004 ] [PMID: 24769080]
[http://dx.doi.org/10.4155/fmc.12.80 ] [PMID: 22857533]
[PMID: 25313724]
[http://dx.doi.org/10.1038/nrd2133 ] [PMID: 16955068]
[http://dx.doi.org/10.1158/0008-5472.CAN-03-0799 ] [PMID: 14871841]
[http://dx.doi.org/10.3892/ijmm.2014.1795 ] [PMID: 24899129]
[PMID: 24817927]
[http://dx.doi.org/10.1155/2010/479364 ] [PMID: 20798865]
[http://dx.doi.org/10.1295/polymj.17.117]
[http://dx.doi.org/10.1016/S1359-6446(01)01757-3 ] [PMID: 11301287]
[http://dx.doi.org/10.1002/jps.21079 ] [PMID: 17721949]
[http://dx.doi.org/10.1016/j.jmgm.2017.07.017 ] [PMID: 28759825]
[http://dx.doi.org/10.1016/j.jmgm.2015.05.012 ] [PMID: 26093506]
[http://dx.doi.org/10.1002/jcc.20290 ] [PMID: 16200636]
[http://dx.doi.org/10.1002/jcc.10349 ] [PMID: 14531054]
[http://dx.doi.org/10.1063/1.445869]]
[http://dx.doi.org/10.1063/1.464397]]
[http://dx.doi.org/10.1063/1.448118]
[http://dx.doi.org/10.1007/s10867-012-9277-5 ] [PMID: 23144513]
[http://dx.doi.org/10.1021/ci500691p ] [PMID: 25622696]
[http://dx.doi.org/10.1002/cmdc.201700229 ] [PMID: 28544630]
[http://dx.doi.org/10.1016/j.ijbiomac.2018.01.121 ] [PMID: 29402457]
[http://dx.doi.org/10.2174/1871520616666161019143219 ] [PMID: 27774878]
[http://dx.doi.org/10.1134/S0026893308040195 ] [PMID: 18856071]
[http://dx.doi.org/10.1039/c0jm03876h]