title: Effects of nemorosone, isolated from the plant Clusia rosea, on the cell cycle and gene expression in MCF-7 BUS breast cancer cell lines.
abstract: BACKGROUND
  Breast cancer is the cause of considerable morbidity and mortality in women. While estrogen receptor antagonists have been widely used in breast cancer treatment, patients have increasingly shown resistance to these agents and the identification of novel targeted therapies is therefore required. Nemorosone is the major constituent of the floral resin from Clusia rosea and belongs to the class of polycyclic polyisoprenylated benzophenones of the acylphloroglucinol group. The cytotoxicity of nemorosone in human cancer cell lines has been reported in recent years and has been related to estrogen receptors in breast cancer cells.
  
  
  METHODS
  Changes induced by nemorosone in the cell cycle and gene expression of the MCF-7 BUS (estrogen-dependent) breast cancer cell line were analyzed using flow cytometry and the RT(2) Profiler PCR array, respectively.
  
  
  RESULTS
  In comparison to breast cancer cells without treatment, nemorosone induced discrete cell cycle arrest in the G1 phase and significant depletion in the G2 phase. Moreover, the compound altered the expression of 19 genes related to different pathways, especially the cell cycle, apoptosis and hormone receptors.
  
  
  CONCLUSIONS
  These promising results justify further studies to clarify mechanisms of action of nemorosone, in view of evaluate the possible use of this benzophenone as adjuvant in the treatment of breast cancer.
authors: UNESP - Univ. Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Ciências Biológicas, CEP 14801-902, Araraquara, São Paulo, Brazil.
authors: M S
authors: MS
authors: Camargo
authors: UEL - Univ. Estadual Londrina, Londrina, Paraná, Brazil.
authors: M T
authors: MT
authors: Oliveira
authors: UNESP - Univ. Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Ciências Biológicas, CEP 14801-902, Araraquara, São Paulo, Brazil.
authors: M M
authors: MM
authors: Santoni
authors: UNESP - Univ. Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Ciências Biológicas, CEP 14801-902, Araraquara, São Paulo, Brazil. Electronic address: flaviabiomed@yahoo.com.br.
authors: F A
authors: FA
authors: Resende
authors: UNESP - Univ. Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Ciências Biológicas, CEP 14801-902, Araraquara, São Paulo, Brazil.
authors: A P
authors: AP
authors: Oliveira-Höhne
authors: UNESP - Univ. Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Ciências Biológicas, CEP 14801-902, Araraquara, São Paulo, Brazil.
authors: L G
authors: LG
authors: Espanha
authors: UNESP - Univ. Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Ciências Biológicas, CEP 14801-902, Araraquara, São Paulo, Brazil.
authors: C H
authors: CH
authors: Nogueira
authors: Instituto de Farmacia y Alimentos (IFAL), Universidad de La Habana, La Habana, Cuba.
authors: O
authors: O
authors: Cuesta-Rubio
authors: UNESP - Univ. Estadual Paulista, Instituto de Química, Campus Araraquara, c.p. 355, CEP 14800-900, Araraquara, São Paulo, Brazil.
authors: W
authors: W
authors: Vilegas
authors: UNESP - Univ. Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Ciências Biológicas, CEP 14801-902, Araraquara, São Paulo, Brazil.
authors: E A
authors: EA
authors: Varanda
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D001577:Benzophenones / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000473:pathology*; D002453:Cell Cycle / Q000187:drug effects*; D031251:Clusia / Q000737:chemistry*; D005260:Female; D035264:Flowers / Q000737:chemistry; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D061986:MCF-7 Cells / Q000187:drug effects
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D001577:Benzophenones; C437463:nemorosone
keywords: Breast cancer; Cell cycle; Clusia rosea; Gene expression; Nemorosone