Chemopreventive Effects of Wild Carrot Oil Against 7,12-dimethyl Benz(a)anthracene-Induced Squamous Cell Carcinoma in Mice

Pharm Biol. 2011 Sep;49(9):955-61. doi: 10.3109/13880209.2011.559250. Epub 2011 Jul 21.

Abstract

Context: Daucus carota L. ssp. carota (Apiacea) is widely distributed throughout the world and has many uses in traditional medicine.

Objective: The present study investigates the chemopreventive effects of oil extract of D. carota umbels on 7,12-dimethyl benz(a)anthracene (DMBA)-induced skin cancer in mice.

Materials and methods: D. carota oil extract (DCOE) was prepared by extracting the dried umbels with 50:50 acetone:methanol. Skin papilloma were initiated by DMBA and promoted by 12-O-tetradecanoyl phorobol-13-acetate (TPA). The extract was administered to animals via gavage (0.02 mL of 100% oil), intraperitoneal (0.3 mL of 2% oil), and topical (0.2 mL of 5, 50, and 100% oil) routes for 20 weeks. Tumor appearance, incidence, yield, and volume were compared with those of a non-treated control group.

Results: Topical 100% treatment delayed tumor appearance, and inhibited tumor incidence and yield by 40 and 89%, respectively. Topical 50% treatment inhibited tumor incidence and yield by 30 and 83%, respectively, whereas the 5% treatment inhibited tumor yield by 36%. Tumor volume was decreased by 99, 91, and 70% following topical treatments with 100, 50, and 5% oil, respectively. Intraperitoneal treatment inhibited tumor yield by 43%, and decreased tumor volume by 85%, whereas gavage treatment showed minimal effects on both. Intraperitoneal and topical treatment decreased infiltration and hyperplasia with an increase in the level of hyperkeratosis.

Conclusion: These findings demonstrate that DCOE has remarkable antitumor activity against DMBA-induced skin cancer compared with non-treated animals paving the ground for further investigations.

MeSH terms

  • 9,10-Dimethyl-1,2-benzanthracene / toxicity
  • Animals
  • Anticarcinogenic Agents / chemistry
  • Anticarcinogenic Agents / pharmacology*
  • Carcinogens / toxicity
  • Carcinoma, Squamous Cell / chemically induced
  • Carcinoma, Squamous Cell / pathology
  • Carcinoma, Squamous Cell / prevention & control*
  • Chemoprevention / methods
  • Daucus carota / chemistry*
  • Flowers
  • Mice
  • Mice, Inbred BALB C
  • Oils / chemistry
  • Oils / pharmacology
  • Papilloma / chemically induced
  • Papilloma / pathology
  • Papilloma / prevention & control*
  • Phytotherapy
  • Plant Extracts / pharmacology*
  • Plant Extracts / toxicity
  • Skin Neoplasms / chemically induced
  • Skin Neoplasms / pathology
  • Skin Neoplasms / prevention & control*
  • Tumor Burden / drug effects

Substances

  • Anticarcinogenic Agents
  • Carcinogens
  • Oils
  • Plant Extracts
  • 9,10-Dimethyl-1,2-benzanthracene