title: Biological evaluation of new nickel(II) metallates: Synthesis, DNA/protein binding and mitochondrial mediated apoptosis in human lung cancer cells (A549) via ROS hypergeneration and depletion of cellular antioxidant pool.
abstract: A series of novel nickel(II) thiosemicarbazone complexes(1-4) have been prepared and characterized by various spectral, analytical techniques and X-ray crystallography. Further, their efficacy to interact with CT-DNA/BSA has been explored. From the binding studies, it is inferred that complex 4 found to be more active than other complexes. The complexes bound with CT-DNA by intercalation mode. Moreover, static quenching was observed for their interaction with BSA. The new complexes were tested for their in vitro cytotoxicity against human lung adenocarcinoma (A549) cell line. The results showed that the new complexes exhibited significant degree of cytotoxicity at given experimental condition. Further, the results of LDH and NO release supported the cytotoxic nature of the complexes. The observed cytotoxicity of the complexes may be routed through ROS-hypergeneration and lipid-peroxidation with subsequent depletion of cellular antioxidant pool (GSH, SOD, CAT, GPx and GST) resulted in the reduction of mitochondrial-membrane potential, caspase-3 activation and DNA fragmentation. Thus, the data from the present study disclose that the complexes could induce apoptosis in A549 cells through mitochondrial mediated fashion and inhibited the migration of lung cancer cells and by metastasis.
authors.affiliation: Department of Chemistry, Bharathiar University, Coimbatore 641 046, India.
authors.forename: P
authors.initials: P
authors.lastname: Kalaivani
authors.affiliation: Department of Biotechnology, Bharathiar University, Coimbatore 641 046, India.
authors.forename: S
authors.initials: S
authors.lastname: Saranya
authors.affiliation: Department of Biotechnology, Bharathiar University, Coimbatore 641 046, India.
authors.forename: P
authors.initials: P
authors.lastname: Poornima
authors.affiliation: Department of Chemistry, Bharathiar University, Coimbatore 641 046, India. Electronic address: rpnchemist@gmail.com.
authors.forename: R
authors.initials: R
authors.lastname: Prabhakaran
authors.affiliation: Aix Marseille Université, CNRS, MADIREL UMR 7246, 13397, Marseille, France.
authors.forename: F
authors.initials: F
authors.lastname: Dallemer
authors.affiliation: Department of Biotechnology, Bharathiar University, Coimbatore 641 046, India.
authors.forename: V
authors.initials: V
authors.lastname: Vijaya Padma
authors.affiliation: Department of Chemistry, Bharathiar University, Coimbatore 641 046, India. Electronic address: k_natraj6@yahoo.com.
authors.forename: K
authors.initials: K
authors.lastname: Natarajan
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D000975:Antioxidants / Q000378:metabolism; D017209:Apoptosis / Q000187:drug effects*; D002417:Cattle; D049109:Cell Proliferation / Q000187:drug effects; D004247:DNA / Q000737:chemistry / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D008928:Mitochondria / Q000378:metabolism; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D017382:Reactive Oxygen Species / Q000378:metabolism; D012710:Serum Albumin, Bovine / Q000187:drug effects*; D013329:Structure-Activity Relationship; D013882:Thiosemicarbazones / Q000737:chemistry*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D000975:Antioxidants; D009942:Organometallic Compounds; D017382:Reactive Oxygen Species; D013882:Thiosemicarbazones; D012710:Serum Albumin, Bovine; D009532:Nickel; D004247:DNA; C427203:calf thymus DNA
keywords: CT-DNA/BSA binding; Cytotoxicity; Depletion of cellular antioxidant pool; Mitochondrial-membrane potential; Nickel(II) thiosemicarbazone complexes; ROS-hypergeneration