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Jhulki, Lalmohan,Dutta, Parul,Santra, Manas Kumar,Cardoso, Marlon H.,Oshiro, Karen G. N.,Franco, Octá,vio L.,Bertolasi, Valerio,Isab, Anvarhusein A.,Bielawski, Christopher W.,Dinda, Joydev The Royal Society of Chemistry 2018 NEW JOURNAL OF CHEMISTRY Vol.42 No.16
<P>The synthesis, structures and anticancer studies of a series of precious metal complexes supported by 1-methyl-2-(phenyl)imidazo[1,5-<I>a</I>]pyridine-2-ylidene (1) have been highlighted. The Ag(i) (2), Au(i) (3) and Au(iii) (4) complexes were prepared using standard methods and characterized by a range of techniques, including NMR spectroscopy, X-ray crystallography and elemental analyses. The <I>in vitro</I> cytotoxicity activities displayed by 2-4 were explored against human colon adenocarcinoma (HCT116), lung cancer (A549) and breast cancer (MCF7) cell lines. A series of assays showed that all of the complexes exhibited significant growth inhibition in the aforementioned cell lines. Inspection of the data collected revealed that the Au(i) and Ag(i) complexes were more potent than their Au(iii) congener, a trend that was found to be consistent with molecular docking studies that utilized BCL-2 as a model as this protein regulates cell death through apoptosis.</P>
Rana, Bidyut Kumar,Mishra, Snehasis,Sarkar, Deblina,Mondal, Tapan Kumar,Seth, Saikat K.,Bertolasi, Valerio,Das Saha, Krishna,Bielawski, Christopher W.,Isab, Anvarhusein A.,Dinda, Joydev The Royal Society of Chemistry 2018 NEW JOURNAL OF CHEMISTRY Vol.42 No.13
<P>To elucidate the intrinsic biological activities displayed by platinum <I>versus</I> gold-based organometallic reagents, the isoelectronic and isostructural square planar complexes [Pt(C∩N)(C)Cl][PF6] (2) and [Au(C∩N)(C)Cl][PF6]2 (3), which are supported by a common N-heterocyclic carbene, 1-methyl-2-pyridin-2-yl-2<I>H</I>-imidazo[1,5-<I>a</I>]pyridin-4-ylidene (1), were synthesized. The complexes were characterized using a range of spectroscopic techniques as well as single crystal X-ray diffraction and a series of computational studies were also performed to gain additional insight into their fundamental electronic bonding structures. The cytotoxicities of the complexes were tested <I>in vitro</I> against non-small lung carcinoma (A549), colorectal carcinoma (HCT-116) and human hepatocellular carcinoma (HepG2) cell lines. The measured IC50 values showed that the Au(iii)-NHC complex is more potent than its Pt analogue.</P>