title: Acyclonucleosides, modified seco-nucleosides, and salicyl- or catechol-derived acyclic 5-fluorouracil O,N-acetals: antiproliferative activities, cellular differentiation and apoptosis.
abstract: The goal of cancer chemotherapy with classical drugs - the destruction of the tumor cells - is often complicated by significant toxicity. As an alternative, induced differentiation modulates the cell programme by transforming malignant cells into mature cells with no proliferative potential. Our data demonstrate that (+/-)-1-{[3-(2-hydroxyethoxy)-1-isopropoxy]propyl}-5-fluorouracil inhibits proliferation, induces myogenic differentiation, increases the expression of proteins specifically present in normally differentiated skeletal muscle cells, and modifies the adhesion capacity of these cells against the rhabdomyosarcoma cell line RD. From a designing point of view, a benzene ring was fused to the side chain in order to increase the lipophilicity and anticancer activity of our molecules. Herein we report the preparation and biological activity of three compounds having the general formula (+/-)-1-[2-(5-substituted-2-hydroxybenzyloxy)-1-methoxyethyl]-5-fluorouracils. A catechol-derived compound such as (+/-)-1-[3-(2-hydroxyphenoxy)-1-methoxypropyl]-5-fluorouracil and two salicyl-derived compounds such as (+/-)-(Z)-1-[4-(2-hydroxyphenyl)-1-methoxy-but-3-enyl]-5-fluorouracil [(Z)-43] and its dihydrogenated derivative (+/-)-1-[4-(2-hydroxyphenyl)-1-methoxybutyl]-5-fluorouracil were prepared to complete the set of six O,N-acetals. The most active compound against the MCF-7 breast cancer cell line was (+/-)-(Z)-43 with an IC(50) = 9.40 +/- 0.64 microM. Differentiated breast cancer cells generate fat deposits within the cytoplasm. The MCF-7 cells trea-ed with (+/-)-(Z)-43 caused an increase in the lipid content over control cells after 3 days of treatment. Our results suggest that there may be significant potential advantages in the use of this new differentiating agent for the treatment of breast cancer.
authors.affiliation: Instituto de Biopatologia y Medicina Regenerativa, Departamento de Anatomia y Embriologia Humana, Facultad de Medicina, Avenida de Madrid s/n, 18071 Granada, Spain.
authors.forename: Juan A
authors.initials: JA
authors.lastname: Marchal
authors.forename: María C
authors.initials: MC
authors.lastname: Núñez
authors.forename: Antonia
authors.initials: A
authors.lastname: Aránega
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Gallo
authors.forename: Antonio
authors.initials: A
authors.lastname: Espinosa
authors.forename: Joaquín M
authors.initials: JM
authors.lastname: Campos
mesh_terms: D000080:Acetals / Q000737:chemistry / Q000494:pharmacology*; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D001943:Breast Neoplasms / Q000188:drug therapy; D002454:Cell Differentiation / Q000187:drug effects*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D005472:Fluorouracil / Q000737:chemistry; D006801:Humans; D009705:Nucleosides / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000080:Acetals; D000970:Antineoplastic Agents; D009705:Nucleosides; D005472:Fluorouracil