Influence of zinc on onset and progression of oral carcinogenesis in rats. Mathur, A., Wallenius, K., & Abdulla, M. Acta Odontologica Scandinavica, 37(5):277–284, 1979.
doi  abstract   bibtex   
Three-week-old female rats were fed 0.09 (zinc-deficient), 0.77 (zinc-adequate) or 3.98 (zinc-supplemented) mmol zinc/kg diet in three experimental groups and the palatal mucosa was painted with the water-soluble carcinogen 4-nitroquinoline N-oxide (4NQO) three times a week for 20 weeks. The zinc-supplemented diet seemed to retard the induction of carcinogenesis, whereas a low-zinc diet had the opposite effect. Once initial cellular changes had been induced the supplementary zinc seemed to accelerate their further advancement. Zinc-deficiency in animals fed a copper/zinc low-zinc diet was reflected in the plasma and liver zinc levels as well as in the copper/zinc ratio. The development of cancer was accompanied by a decrease in plasma zinc and an increase in the plasma copper/zinc ratio as well as in the liver zinc. These changes were most remarkable in the zinc-supplemented group.
@article{mathur_influence_1979,
	title = {Influence of zinc on onset and progression of oral carcinogenesis in rats},
	volume = {37},
	issn = {0001-6357},
	doi = {10.3109/00016357909004697},
	abstract = {Three-week-old female rats were fed 0.09 (zinc-deficient), 0.77 (zinc-adequate) or 3.98 (zinc-supplemented) mmol zinc/kg diet in three experimental groups and the palatal mucosa was painted with the water-soluble carcinogen 4-nitroquinoline N-oxide (4NQO) three times a week for 20 weeks. The zinc-supplemented diet seemed to retard the induction of carcinogenesis, whereas a low-zinc diet had the opposite effect. Once initial cellular changes had been induced the supplementary zinc seemed to accelerate their further advancement. Zinc-deficiency in animals fed a copper/zinc low-zinc diet was reflected in the plasma and liver zinc levels as well as in the copper/zinc ratio. The development of cancer was accompanied by a decrease in plasma zinc and an increase in the plasma copper/zinc ratio as well as in the liver zinc. These changes were most remarkable in the zinc-supplemented group.},
	language = {eng},
	number = {5},
	journal = {Acta Odontologica Scandinavica},
	author = {Mathur, A. and Wallenius, K. and Abdulla, M.},
	year = {1979},
	pmid = {118633},
	keywords = {4-Nitroquinoline-1-oxide, Animals, Copper, Female, Male, Mouth Mucosa, Mouth Neoplasms, Neoplasms, Experimental, Palate, Soft, Rats, Zinc},
	pages = {277--284},
}

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