title: Synthesis, characterization and in vitro anti-tumor activities of novel 9-ethyl-9H-purine derivatives.
abstract: Newer series of 9-ethyl-9H-purine derivatives (EPD) were synthesized and screened for their efficacy in inhibiting the proliferation of various tumor cells in vitro. We evaluated the effects of EPD against HeLa, SiHa, CaSki (human cervical cancer cells), LM8, LM8G7 (murine osteosarcoma cells), OVSAHO and SKOV-3 (human ovarian cancer cells). The chemical structures of the EPD were confirmed by (1)H NMR and LCMS analyses. The inhibitory effects of EPD were studied by using trypan blue exclusion, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and TetraColor One reagents. Furthermore, SAR studies revealed that the presence of trifluoromethoxy and trifluromethyl group in 4b and 4g, respectively are responsible for the significant activity of the EPD against cervical cancer cells and the presence of isopropoxy group in 4f has influence in inhibiting the proliferation of osteosarcoma and ovarian cancer cell types.
authors.affiliation: Syngene International Ltd, Biocon Park, Bangalore, 560 099, Karnataka, India.
authors.forename: Raghu
authors.initials: R
authors.lastname: Ningegowda
authors.forename: Amit
authors.initials: A
authors.lastname: Grover
authors.lastname: Basappa
authors.forename: S
authors.initials: S
authors.lastname: Ranjith
authors.forename: Kanchugarakoppal S
authors.initials: KS
authors.lastname: Rangappa
authors.forename: B S
authors.initials: BS
authors.lastname: Priya
authors.forename: S
authors.initials: S
authors.lastname: Nanjunda Swamy
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D011687:Purines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D011687:Purines; D000225:Adenine; C030985:purine