3 research outputs found
Antitumoral, Antihypertensive, Antimicrobial, and Antioxidant Effects of an Octanuclear Copper(II)-Telmisartan Complex with an Hydrophobic Nanometer Hole
A new Cu(II) complex with the antihypertensive drug telmisartan, [Cu8Tlm16].24H2O (CuTlm), was synthesized and characterized by elemental analysis and electronic, FTIR, Raman and EPR spectroscopy. The crystal structure (at 120 K) was solved by X-ray diffraction methods. The octanuclear complex is a hydrate of but otherwise isostructural to the previously reported [Cu8Tlm16] complex. [Cu8Tlm16].24H2O crystallizes in the tetragonal P4/ncc space group with a=b=47.335(1), c=30.894(3) Ă…, Z=4 molecules per unit cell giving a macro-cyclic ring with a double helical structure. The Cu(II) ions are in a distorted bi-pyramidal environment with a somewhat twisted square basis, cis-coordinated at their core N2O2 basis to two carboxylate oxygen and to two terminal benzimidazole nitrogen atoms. Cu8Tlm16 has a toroidal-like shape with a hydrophobic nanometer hole and their crystal packing defines nano-channels that extend along the crystal c-axis. Several biological activities of the complex and the parent ligand were examined in vitro. The antioxidant measurements indicate that the complex behaves as a superoxide dismutase mimics with improved superoxide scavenger power as compared with native sartan. The capacity of telmisartan and its copper complex to expand human mesangial cells (previously contracted by angiotensin II treatment) is similar to each other. The antihypertensive effect of the compounds is attributed to the strongest binding affinity to angiotensin II type 1 receptor and not to the antioxidant effects. The cytotoxic activity of the complex and that of its components was determined against lung cancer cell line A549 and three prostate cancer cell lines (LNCaP, PC-3 and DU 145). The complex displays some inhibitory effect on the A549 line and a high viability decrease on the LNCaP (androgen-sensitive) line. From flow cytometric analysis it was established an apoptotic mechanism for the latter cell line. Telmisartan and CuTlm show antibacterial and antifungal activities in various strains and CuTlm displays improved activity against the Stafilococcus aureus strain as compared with unbounded copper(II).Fil: Islas, MarĂa Soledad. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Centro de QuĂmica Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de QuĂmica Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: MartĂnez Medina, Juan JosĂ©. Universidad Nacional del Chaco Austral; ArgentinaFil: LĂłpez TĂ©vez, Libertad Leonor. Universidad Nacional del Chaco Austral; ArgentinaFil: Rojo, TeĂłfilo. Universidad del PaĂs Vasco; EspañaFil: Lezama, Luis. Universidad del PaĂs Vasco; EspañaFil: Griera Merino, Mercedes. Universidad de Alcalá; EspañaFil: Calleros, Laura. Universidad de Alcalá; EspañaFil: CortĂ©s, MarĂa Alicia. Universidad de Alcalá; España. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Rodriguez Puyol, Manuel. Universidad de Alcalá; EspañaFil: EcheverrĂa, Gustavo Alberto. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Instituto de FĂsica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de FĂsica La Plata; ArgentinaFil: Piro, Oscar Enrique. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Instituto de FĂsica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de FĂsica La Plata; ArgentinaFil: Ferrer, Evelina Gloria. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Centro de QuĂmica Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de QuĂmica Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: Williams, Patricia Ana MarĂa. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Centro de QuĂmica Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de QuĂmica Inorgánica "Dr. Pedro J. Aymonino"; Argentin