Effect of Dietary Protein Quality on Development of Aflatoxin B1-induced Hepatic Preneoplastic Lesions

J Natl Cancer Inst. 1989 Aug 16;81(16):1241-5. doi: 10.1093/jnci/81.16.1241.


The effect of the quality of dietary protein on the post-initiation development of aflatoxin B1-initiated putatively preneoplastic foci in Fischer 344 rat liver was compared with the effect of the quantity of dietary protein. Feeding wheat gluten, a low-quality protein, during the postinitiation period (between the end of aflatoxin B1 dosing and the death of the rats) inhibited the development of gamma-glutamyltransferase-positive foci when compared with that in animals fed high-quality protein (casein) diets during the same period. Lysine supplementation of wheat gluten during the postinitiation period enhanced the gamma-glutamyltransferase-positive response to a level comparable with that of the high-quality protein. These results suggest that one can inhibit the development of foci either by decreasing the quantity of protein intake and holding the quality of the protein constant or by decreasing the quality and holding the quantity constant.

Publication types

  • Comparative Study

MeSH terms

  • Aflatoxin B1
  • Aflatoxins
  • Animals
  • Carcinogens
  • Caseins / administration & dosage
  • Caseins / adverse effects
  • Dietary Proteins / administration & dosage
  • Dietary Proteins / pharmacology
  • Dietary Proteins / standards*
  • Eating
  • Glutens / administration & dosage
  • Glutens / pharmacology
  • Liver Neoplasms, Experimental / chemically induced
  • Liver Neoplasms, Experimental / metabolism*
  • Liver Neoplasms, Experimental / prevention & control
  • Lysine / adverse effects
  • Male
  • Precancerous Conditions / chemically induced
  • Precancerous Conditions / metabolism*
  • Precancerous Conditions / prevention & control
  • Rats
  • Rats, Inbred F344
  • Triticum
  • Weight Gain
  • gamma-Glutamyltransferase / analysis


  • Aflatoxins
  • Carcinogens
  • Caseins
  • Dietary Proteins
  • Glutens
  • Aflatoxin B1
  • gamma-Glutamyltransferase
  • Lysine