Blackberry Extracts Inhibit Activating Protein 1 Activation and Cell Transformation by Perturbing the Mitogenic Signaling Pathway

Details

• Personal Author:
  Bowman LL ; Castranova, Vincent ; Ding M ; Feng R ; Jiang BH ; Leonard, Stephen S. ; Lu Y ; Shi X ; Vallyathan V
• Description:
  Blackberries are natural rich sources of bioflavonoids and phenolic compounds that are commonly known as potential chemopreventive agents. Here, we investigated the effects of fresh blackberry extracts on proliferation of cancer cells and neoplastic transformation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA), as well as the underlying mechanisms of signal transduction pathways. Using electron spin resonance, we found that blackberry extract is an effective scavenger of free radicals, including hydroxyl and superoxide radicals. Blackberry extract inhibited the proliferation of a human lung cancer cell line, A549. Pretreatment of A549 cells with blackberry extract resulted in an inhibition of 8-hydroxy-2'-deoxyguanosine (8-OHdG) formation induced by ultraviolet B (UVB) irradiation. Blackberry extract decreased TPA-induced neoplastic transformation of JB6 P+ cells. Pretreatment of JB6 cells with blackberry extract resulted in the inhibition of both UVB- and TPA-induced AP-1 transactivation. Furthermore, blackberry extract also blocked UVB- or TPA-induced phosphorylation of ERKs and JNKs, but not p38 kinase. Overall, these results indicated that an extract from fresh blackberry may inhibit tumor promoter-induced carcinogenesis and associated cell signaling, and suggest that the chemopreventive effects of fresh blackberry may be through its antioxidant properties by blocking reactive oxygen species-mediated AP-1 and mitogen-activated protein kinase activation. [Description provided by NIOSH]
• Subjects:
  Carcinogens Free Radicals Lung Lung Diseases Neoplasms Occupational Health Phenol Respiratory System Respiratory Tract Diseases Safety
• Keywords:
  Cancer Carcinogenesis Carcinogenicity Cell-transformation Free-radicals Lung-cancer Phenolic-compounds Phenols Pulmonary-system-disorders Respiratory-system-disorders
• ISSN:
  0163-5581
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  80-89
• Volume:
  50
• Issue:
  1
• NIOSHTIC Number:
  nn:20025835
• Citation:
  Nutr Cancer 2004 Jan; 50(1):80-89
• Federal Fiscal Year:
  2004
• NORA Priority Area:
  Research Tools and Approaches: Cancer Research Methods
• Peer Reviewed:
  True
• Source Full Name:
  Nutrition and Cancer
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:108224b7f02deabd84b7c9aa5d66fea6f3e2fa01b9569ec26b611a0d501710568b6c4254161ab4515fe3e69bd789b896da14ced4ead8ad545f27955d08cbd471
• Download URL:
  https://stacks.cdc.gov/view/cdc/197047/cdc_197047_DS1.pdf
• File Type:
  [PDF - 563.08 KB ]