Chemopreventive effects of Aloe arborescens on N-nitrosobis(2-oxopropyl)amine-induced pancreatic carcinogenesis in hamsters

Fumio Furukawa, Akiyoshi Nishikawa, Takeshi Chihara, Kan Shimpo, Hidehiko Beppu, Hiroshi Kuzuya, In Seon Lee, Masao Hirose

研究成果: Article

29 引用 (Scopus)

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The modification effects of freeze-dried aloe (Aloe arborescens) whole leaf powder during the initiation phase of carcinogenesis were investigated in hamsters treated with N-nitrosobis(2-oxopropyl)amine (BOP). Female Syrian hamsters were given four weekly subcutaneous injections of BOP at a dose of 10mg/kg and then given 0, 1 or 5% aloe in their diet for 5 weeks. At week 54 of the experiment, all surviving animals were sacrificed and development of neoplastic and preneoplastic lesions was assessed histopathologically. The incidences of pancreatic adenocarcinomas, atypical hyperplasias or total atypical hyperplasias plus adenocarcinomas were significantly (P < 0.05) decreased with BOP + 5% aloe, and that of adenocarcinomas were also significantly (P < 0.05) reduced in the BOP + 1% aloe as compared to the BOP alone group. Multiplicities of pancreatic adenocarcinomas, atypical hyperplasias or total lesions were also significantly (P < 0.01 or P < 0.05) lower in the BOP + 5% aloe group than with the BOP alone. Quantitative data for neoplastic lesions in the lung, liver, gall bladder, kidney and urinary bladder of hamsters were not significantly different among the three groups. In a satellite experiment, pretreatment with aloe significantly (P < 0.01) reduced the formation of O6-methyldeoxyguanosine in epithelial cells of pancreatic ducts as compared to the BOP alone value. Our results thus indicate that aloe prevents BOP-induced pancreatic neoplasia in hamsters in relation to decreased DNA adduct formation in the target tissue.

元の言語English
ページ(範囲)117-122
ページ数6
ジャーナルCancer Letters
178
発行部数2
DOI
出版物ステータスPublished - 25-04-2002

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nitrosobis(2-oxopropyl)amine
Aloe
Cricetinae
Carcinogenesis
Adenocarcinoma
Hyperplasia
Urinary Bladder
DNA Adducts
Pancreatic Ducts
Mesocricetus
Subcutaneous Injections
Powders

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

これを引用

Furukawa, Fumio ; Nishikawa, Akiyoshi ; Chihara, Takeshi ; Shimpo, Kan ; Beppu, Hidehiko ; Kuzuya, Hiroshi ; Lee, In Seon ; Hirose, Masao. / Chemopreventive effects of Aloe arborescens on N-nitrosobis(2-oxopropyl)amine-induced pancreatic carcinogenesis in hamsters. :: Cancer Letters. 2002 ; 巻 178, 番号 2. pp. 117-122.
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title = "Chemopreventive effects of Aloe arborescens on N-nitrosobis(2-oxopropyl)amine-induced pancreatic carcinogenesis in hamsters",
abstract = "The modification effects of freeze-dried aloe (Aloe arborescens) whole leaf powder during the initiation phase of carcinogenesis were investigated in hamsters treated with N-nitrosobis(2-oxopropyl)amine (BOP). Female Syrian hamsters were given four weekly subcutaneous injections of BOP at a dose of 10mg/kg and then given 0, 1 or 5{\%} aloe in their diet for 5 weeks. At week 54 of the experiment, all surviving animals were sacrificed and development of neoplastic and preneoplastic lesions was assessed histopathologically. The incidences of pancreatic adenocarcinomas, atypical hyperplasias or total atypical hyperplasias plus adenocarcinomas were significantly (P < 0.05) decreased with BOP + 5{\%} aloe, and that of adenocarcinomas were also significantly (P < 0.05) reduced in the BOP + 1{\%} aloe as compared to the BOP alone group. Multiplicities of pancreatic adenocarcinomas, atypical hyperplasias or total lesions were also significantly (P < 0.01 or P < 0.05) lower in the BOP + 5{\%} aloe group than with the BOP alone. Quantitative data for neoplastic lesions in the lung, liver, gall bladder, kidney and urinary bladder of hamsters were not significantly different among the three groups. In a satellite experiment, pretreatment with aloe significantly (P < 0.01) reduced the formation of O6-methyldeoxyguanosine in epithelial cells of pancreatic ducts as compared to the BOP alone value. Our results thus indicate that aloe prevents BOP-induced pancreatic neoplasia in hamsters in relation to decreased DNA adduct formation in the target tissue.",
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Chemopreventive effects of Aloe arborescens on N-nitrosobis(2-oxopropyl)amine-induced pancreatic carcinogenesis in hamsters. / Furukawa, Fumio; Nishikawa, Akiyoshi; Chihara, Takeshi; Shimpo, Kan; Beppu, Hidehiko; Kuzuya, Hiroshi; Lee, In Seon; Hirose, Masao.

:: Cancer Letters, 巻 178, 番号 2, 25.04.2002, p. 117-122.

研究成果: Article

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T1 - Chemopreventive effects of Aloe arborescens on N-nitrosobis(2-oxopropyl)amine-induced pancreatic carcinogenesis in hamsters

AU - Furukawa, Fumio

AU - Nishikawa, Akiyoshi

AU - Chihara, Takeshi

AU - Shimpo, Kan

AU - Beppu, Hidehiko

AU - Kuzuya, Hiroshi

AU - Lee, In Seon

AU - Hirose, Masao

PY - 2002/4/25

Y1 - 2002/4/25

N2 - The modification effects of freeze-dried aloe (Aloe arborescens) whole leaf powder during the initiation phase of carcinogenesis were investigated in hamsters treated with N-nitrosobis(2-oxopropyl)amine (BOP). Female Syrian hamsters were given four weekly subcutaneous injections of BOP at a dose of 10mg/kg and then given 0, 1 or 5% aloe in their diet for 5 weeks. At week 54 of the experiment, all surviving animals were sacrificed and development of neoplastic and preneoplastic lesions was assessed histopathologically. The incidences of pancreatic adenocarcinomas, atypical hyperplasias or total atypical hyperplasias plus adenocarcinomas were significantly (P < 0.05) decreased with BOP + 5% aloe, and that of adenocarcinomas were also significantly (P < 0.05) reduced in the BOP + 1% aloe as compared to the BOP alone group. Multiplicities of pancreatic adenocarcinomas, atypical hyperplasias or total lesions were also significantly (P < 0.01 or P < 0.05) lower in the BOP + 5% aloe group than with the BOP alone. Quantitative data for neoplastic lesions in the lung, liver, gall bladder, kidney and urinary bladder of hamsters were not significantly different among the three groups. In a satellite experiment, pretreatment with aloe significantly (P < 0.01) reduced the formation of O6-methyldeoxyguanosine in epithelial cells of pancreatic ducts as compared to the BOP alone value. Our results thus indicate that aloe prevents BOP-induced pancreatic neoplasia in hamsters in relation to decreased DNA adduct formation in the target tissue.

AB - The modification effects of freeze-dried aloe (Aloe arborescens) whole leaf powder during the initiation phase of carcinogenesis were investigated in hamsters treated with N-nitrosobis(2-oxopropyl)amine (BOP). Female Syrian hamsters were given four weekly subcutaneous injections of BOP at a dose of 10mg/kg and then given 0, 1 or 5% aloe in their diet for 5 weeks. At week 54 of the experiment, all surviving animals were sacrificed and development of neoplastic and preneoplastic lesions was assessed histopathologically. The incidences of pancreatic adenocarcinomas, atypical hyperplasias or total atypical hyperplasias plus adenocarcinomas were significantly (P < 0.05) decreased with BOP + 5% aloe, and that of adenocarcinomas were also significantly (P < 0.05) reduced in the BOP + 1% aloe as compared to the BOP alone group. Multiplicities of pancreatic adenocarcinomas, atypical hyperplasias or total lesions were also significantly (P < 0.01 or P < 0.05) lower in the BOP + 5% aloe group than with the BOP alone. Quantitative data for neoplastic lesions in the lung, liver, gall bladder, kidney and urinary bladder of hamsters were not significantly different among the three groups. In a satellite experiment, pretreatment with aloe significantly (P < 0.01) reduced the formation of O6-methyldeoxyguanosine in epithelial cells of pancreatic ducts as compared to the BOP alone value. Our results thus indicate that aloe prevents BOP-induced pancreatic neoplasia in hamsters in relation to decreased DNA adduct formation in the target tissue.

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JO - Cancer Letters

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