Abstract |
In order to acquire a fundamental knowledge for the development of better tumor-scanning agents, the in vivo incorporation pattern of three 14C-labeled D- amino acids, alanine, leucine, and tryptophan, into the tumor cells and organs of animals bearing Ehrlich mouse tumor, sarcoma-180, leukemia L-1210, or Yoshida sarcoma was investigated, and compared with that of the corresponding L-forms. The radioactivity of D- amino acids tested was most highly found in tumor cells and pancreas, and the activity in tumor cells was several times higher than that of L-forms. A large portion of the radioactivity of D-forms was found in trichloroacetic acid-soluble fraction of the cells, whereas that of L-forms was mostly in protein fraction, except L-alanine. Although the mechanisms whereby the radioactivity of D- amino acids was concentrated more than that of L-forms in the tumor cells have not yet been clearly elucidated, it was concluded that gamma-emitter-labeled D- amino acids themselves or their derivatives might be useful as tumor-detecting radiopharmaceuticals.
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Authors | O Tamemasa, R Goto, T Suzuki |
Journal | Gan
(Gan)
Vol. 69
Issue 4
Pg. 517-23
(Aug 1978)
ISSN: 0016-450X [Print] Japan |
PMID | 710803
(Publication Type: Journal Article)
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Chemical References |
- Amino Acids
- Carbon Radioisotopes
- Leucine
- Alanine
|
Topics |
- Alanine
(metabolism)
- Amino Acids
(metabolism)
- Animals
- Carbon Radioisotopes
- Carcinoma, Ehrlich Tumor
(metabolism)
- Leucine
(metabolism)
- Leukemia L1210
(metabolism)
- Male
- Mice
- Neoplasms, Experimental
(metabolism)
- Pancreas
(metabolism)
- Sarcoma 180
(metabolism)
- Sarcoma, Yoshida
(metabolism)
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