Niacin deficiency increases the sensitivity of rats to the short and long term effects of ethylnitrosourea treatment

Most chemotherapy agents function by causing damage to the DNA of rapidly dividing cells, such as those in the bone marrow, leading to anemia and leukopenia during chemotherapy and the development of secondary leukemias in the years following recovery from the original disease. We created an animal...

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Published inMolecular and cellular biochemistry Vol. 193; no. 1/2; pp. 83 - 87
Main Authors Boyonoski, A.C, Gallacher, L.M, ApSimon, M.M, Jacobs, R.M, Shah, G.M, Poirier, G.G, Kirkland, J.B
Format Journal Article
LanguageEnglish
Published Netherlands Springer Nature B.V 01.03.1999
Subjects
Age Factors
Anemia - prevention & control
Animal diseases
Animal models
Animals
Bone marrow
Chemotherapy
Drug Interactions
drug therapy
Drug Therapy, Combination
Ethylnitrosourea - therapeutic use
leukopenia
Leukopenia - prevention & control
Male
Medical research
Neoplasms, Experimental - drug therapy
Neoplasms, Experimental - metabolism
niacin
Niacin - deficiency
Niacin - pharmacology
Rats
Rats, Long-Evans
Rodents
vitamin deficiencies
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Summary:Most chemotherapy agents function by causing damage to the DNA of rapidly dividing cells, such as those in the bone marrow, leading to anemia and leukopenia during chemotherapy and the development of secondary leukemias in the years following recovery from the original disease. We created an animal model of nitrosourea-based chemotherapy using ethylnitrosourea (ENU) to investigate the effect of niacin deficiency on the side effects of chemotherapy. Weanling Long-Evans rats were fed diets containing various levels of niacin for a period of 4 weeks. ENU treatment started after 1 week of feeding and consisted of 12 doses delivered by gavage, every other day. Cancer incidence was also monitored in the following months. ENU treatment caused many of the acute symptoms seen in human chemotherapy patients, including anemia and neutropenia. Niacin deficiency (ND) had several interesting effects, alone and in combination with ENU. Niacin deficiency alone caused a modest anemia, while in combination with ENU it induced a severe anemia. Niacin deficiency alone caused a 4-fold increase in circulating neutrophil numbers, and this population was drastically reduced by ENU-treatment. In the long term, macin deficiency caused an increased incidence of cancer, especially chronic granulocytic leukemias.
ISSN:0300-8177
1573-4919
DOI:10.1023/A:1006964227277