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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Miller, E. E. Evans, A. E. Cohn, M. |
| Description | Author Affiliation: Miller EE ( Department of Biochemistry and Biophysics, Johnson Research Foundation, Philadelphia, PA.); |
| Abstract | Growth rate inhibition of subcutaneously implanted tumors results from feeding rats and athymic nude mice diets containing 1% cyclocreatine or 1%, 2%, 5%, or 10% creatine. The tumors studied included rat mammary tumors (Ac33tc in Lewis female rats and 13762A in Fischer 344 female rats), rat sarcoma MCI in Lewis male rats, and tumors resulting from the injection of two human neuroblastoma cell lines, IMR-5 and CHP-134, in athymic nude mice. Inhibition was observed regardless of the time experimental diets were administered, either at the time of tumor implantation or after the appearance of palpable tumors. For mammary tumor Ac33tc, the growth inhibition during 24 days after the implantation was approximately 50% for both 1% cyclocreatine and 1% creatine, and inhibition increased as creatine was increased from 2% to 10% of the diet. For the other rat mammary tumor (13762A), there was approximately 35% inhibition by both 1% cyclocreatine and 2% creatine. In the case of the MCI sarcoma, the inhibitory effect appeared more pronounced at earlier periods of growth, ranging from 26% to 41% for 1% cyclocreatine and from 30% to 53% for 1% creatine; there was no significant difference in growth rate between the tumors in the rats fed 1% and 5% creatine. The growth rate of tumors in athymic nude mice, produced by implantation of the human neuroblastoma IMR-5 cell line, appeared somewhat more effectively inhibited by 1% cyclocreatine than by 1% creatine, and 5% creatine feeding was most effective. For the CHP-134 cell line, 33% inhibition was observed for the 1% cyclocreatine diet and 71% for the 5% creatine diet. In several experiments, a delay in appearance of tumors was observed in animals on the experimental diets. In occasional experiments, neither additive inhibited tumor growth rate for the rat tumors or the athymic mouse tumors. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 90 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1993-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antineoplastic Agents Therapeutic Use Creatine Creatinine Analogs & Derivatives Diet Mammary Neoplasms, Experimental Pathology Neuroblastoma Animals Administration & Dosage Cell Division Drug Effects Kinetics Drug Therapy Mice Mice, Nude Neoplasm Metastasis Rats, Inbred F344 Rats, Inbred Lew Time Factors Transplantation, Heterologous Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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