Coordination of two monoprotonated 2'-deoxyguanosine 5'-monophosphate species, H(dGMP)(-), via N7 to cis-(NH(2))(2)Pt(2+) gives the complex cis-(NH(2))(2)Pt(H.dGMP)(2) which is a four-protonic acid. The corresponding acidity constants were measured by potentiometric pH titrations (25; I = 0.1 M, NaNO(3)). The first two protons are released from the two -P(O)(2)(OH)(-) groups (PK(a/1)= 5.57; PK(...

Binding of the anticancer drug cisplatin (cis-Pt) to nucleic acids is believed to favor DNA over RNA. Covalent modification of DNA produces intrastrand cross-links (at GpG, ApG, and GpNpG; N=A, C, G, or T), and interstrand cross-links (at GG). Cisplatin reacts with other cellular components including proteins, phospholipids, and small molecules. To enhance DNA targeting, numerous conjugates hav...

A series of homoleptic and heteroleptic platinum(II) complexes [Pt(C[triple bond]CFc)2(L-L)] (L-L = COD 1, 1,1'-bis(diphenylphosphino)ferrocene (dppf) 2), Q2[cis/trans-Pt(C6F5)2(C[triple bond]CFc)2] (cis, Q = PMePh3, 3; trans, Q = NBu4, 4), (NBu4)[Pt(bzq)(C[triple bond]CFc)2] 5 (Hbzq = 7,8-benzoquinoline) and (NBu4)2[Pt(C[triple bond]CFc)4] 6 has been synthesized and characterized spectroscopic...

Activation of epidermal growth factor receptor (p-EGFR) is one of the triggers in the development of many malignant tumors, and the measurement of Argentophilic Nucleolus Organizer Regions (AgNOR) area is used as a marker of tumor proliferation. Alpha actin smooth muscle (αASM) of Original Research Article Guerra et al.; BJMMR, 13(9): 1-9, 2016; Article no.BJMMR.23933 2 peritubular cells (PT) a...

The DNA binding and inhibition of transcription in vitro by neutral Rh(2)(mu-O(2)CCH(3))(4) and cationic cis-[Rh(2)(mu-O(2)CCH(3))(2)(phen)(2)](2+) complexes were investigated. The binding constants of the two complexes to calf-thymus DNA were estimated from absorption titrations to be 4.6 x 10(2) M(-)(1) and 1.7 x 10(4) M(-)(1) for Rh(2)(mu-O(2)CCH(3))(4) and cis-[Rh(2)(mu-O(2)CCH(3))(2)(phen)...

The title compound, cis-diacetonitrile[(1R,2R)-1,2-diaminocyclohexane-κ(2)N,N']platinum(II) dinitrate monohydrate, [Pt(C(2)H(3)N)(2)(C(6)H(14)N(2))](NO(3))(2)·H(2)O, is a molecular salt of the diaminocyclohexane-Pt complex cation. There are two formula units in the asymmetric unit. Apart from the two charge-balancing nitrate anions, one neutral molecule of water is present. The components inter...

In the title compound, [Pt(CH(3))(2)(C(18)H(15)As)(2)], the Pt(II) atom adopts a distorted cis-PtAs(2)C(2) square-planar coordination geometry. In the crystal, mol-ecules inter-act via aromatic π-π stacking inter-actions [centroid-centroid separation = 3.6741 (18) Å].

The title complex, [Pt(2)(CH(3))(4)(C(19)H(15)N(2)Si)(2)I][B(C(6)F(5))(4)]·0.66CH(2)Cl(2), resulted from an attempt to synthesize a stable five-coordinate platinum species via ligand abstraction of a six-coordinate platinum precursor. However, dimerization occurred after ligand abstraction, thereby yielding the compound described in this study. The cation is a dinuclear Pt(IV) organometallic co...

Invited for this month's cover picture are the groups of Prof. Alfonso Polo and Dr. Albert Poater at the Universitat de Girona, as well as their collaborators from the Universitat Autònoma de Barcelona and the Institute of Chemical Research of Catalonia. The cover picture shows phosphanylthiolate ligand coordination on a platinum(II) center to give only the bischelate cis -P,P isomer when the l...

The effect of the novel and potent monofunctional platinum(II) agent phenanthriplatin on Escherichia coli and bacteriophage λ lysogens is reported. E. coli filamentation was observed by light microscopy when cells were grown in the presence of phenanthriplatin, cis-[Pt(NH3)2(Am)Cl](+) where Am is phenanthridine. Treatment of lysogenic bacteria with this compound resulted in lysis and the produc...