Efficacy of polyphenon E, red ginseng, and rapamycin on benzo(a)pyrene-induced lung tumorigenesis in A/J mice.
The objective of this investigation was to determine the efficacy of several novel agents in preventing lung tumorigenesis in mice. We evaluated polyphenon E, red ginseng, and rapamycin in A/J mice treated with the tobacco-specific carcinogen benzo(a)pyrene for their ability to inhibit pulmonary adenoma formation and growth. We found that treatment with polyphenon E exhibited a significant reduction on both tumor multiplicity and tumor load (tumor multiplicity x tumor volume) in a dose-dependent fashion. Polyphenon E (2% wt/wt) in the diet reduced tumor multiplicity by 46% and tumor load by 94%. This result provided key evidence in support of a phase II clinical chemoprevention trial of lung cancer. Administration of red ginseng in drinking water decreased tumor multiplicity by 36% and tumor load by 70%. The mammalian target of rapamycin inhibitor rapamycin showed significant efficacy against lung tumor growth in the tumor progression protocol and reduced tumor load by 84%. The results of these investigations demonstrate that polyphenon E, red ginseng, and rapamycin significantly inhibit pulmonary adenoma formation and growth in A/J mice.
Yan
Ying
Y
Department of Surgery, The Alvin J. Siteman Cancer Center, Washington University School of Medicine, Campus Box 8109, 660 South Euclid Avenue, St. Louis, MO 63110, USA.
Wang
Yian
Y
Tan
Qing
Q
Hara
Yukihiko
Y
Yun
Taik-Koo
TK
Lubet
Ronald A
RA
You
Ming
M
D000236:Adenoma / Q000473:pathology; D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000494:pharmacology; D016588:Anticarcinogenic Agents / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000494:pharmacology*; D001564:Benzo(a)pyrene / Q000494:pharmacology; D002392:Catechin / Q000031:analogs & derivatives* / Q000494:pharmacology; D005260:Female; D008175:Lung Neoplasms / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology; D051379:Mice; D005894:Panax / Q000378:metabolism*; D011494:Protein Kinases / Q000378:metabolism; D020123:Sirolimus / Q000494:pharmacology*; D058570:TOR Serine-Threonine Kinases; D013662:Tea
D000903:Antibiotics, Antineoplastic; D016588:Anticarcinogenic Agents; D000970:Antineoplastic Agents; D013662:Tea; D001564:Benzo(a)pyrene; D002392:Catechin; D011494:Protein Kinases; C546843:mTOR protein, mouse; D058570:TOR Serine-Threonine Kinases; C472086:polyphenon E; D020123:Sirolimus