Cytotoxic effects of WR-2721 on mouse testicular cells
WR-2721 (S-2-(3-aminopropylamino)ethylphosphorothioic acid) has been demonstrated to be cytotoxic to stem spermatogonia in the mouse. Five and 10 injections of 300 mg/kg killed sufficient numbers of stem cells to reduce sperm production 56 days after treatment by 16 and 43%, respectively. Single injections of 300 or 400 mg/kg of WR-2721 given 15 min after irradiation produced negligible toxicity to stem cells as measured by counts of repopulated tubules; 600 mg/kg reduced stem cell survival by 47%. Four daily injections of 300 mg/kg given 4, 3, 2, and 1 days prior to irradiation reduced stem cell survival by about 60%. The cytotoxic effects of WR-2721 on testicular stem cells at least partially explains the reduced protection factors observed in the testis with low doses of radiation and during fractionated treatments involving multiple injections of drug.
- Research Organization:
- Univ. of Texas M.D. Anderson Hospital and Tumor Inst., Houston
- OSTI ID:
- 6003278
- Journal Information:
- Int. J. Radiat. Oncol., Biol. Phys.; (United States), Vol. 10:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CELL KILLING
RADIOINDUCTION
SPERMATOGONIA
BIOLOGICAL RADIATION EFFECTS
THIOLS
RADIOSENSITIVITY EFFECTS
CESIUM 137
FRACTIONATED IRRADIATION
GAMMA RADIATION
MICE
STEM CELLS
TESTES
ALKALI METAL ISOTOPES
ANIMAL CELLS
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BODY
CESIUM ISOTOPES
ELECTROMAGNETIC RADIATION
GAMETES
GERM CELLS
GONADS
IONIZING RADIATIONS
IRRADIATION
ISOTOPES
MALE GENITALS
MAMMALS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANS
RADIATION EFFECTS
RADIATIONS
RADIOISOTOPES
RODENTS
SOMATIC CELLS
VERTEBRATES
YEARS LIVING RADIOISOTOPES
560152* - Radiation Effects on Animals- Animals