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Journal Articles

Vulnerability of feline T-lymphocytes to charged particles

Kakizaki, Takehiko; Hamada, Nobuyuki*; Sakashita, Tetsuya; Wada, Seiichi*; Hara, Takamitsu*; Funayama, Tomoo; Hodatsu, Tsutomu*; Natsuhori, Masahiro*; Sano, Tadashi*; Kobayashi, Yasuhiko; et al.

Journal of Veterinary Medical Science, 69(6), p.605 - 609, 2007/06

 Times Cited Count:1 Percentile:84.43(Veterinary Sciences)

no abstracts in English

Journal Articles

Killing of feline T-lymphocytes by $$gamma$$-rays and energetic carbon ions

Kakizaki, Takehiko; Hamada, Nobuyuki*; Funayama, Tomoo; Sakashita, Tetsuya; Wada, Seiichi*; Hodatsu, Tsutomu*; Natsuhori, Masahiro*; Sano, Tadashi*; Kobayashi, Yasuhiko; Ito, Nobuhiko*

Journal of Veterinary Medical Science, 68(12), p.1269 - 1273, 2006/12

 Times Cited Count:3 Percentile:74.1(Veterinary Sciences)

no abstracts in English

Journal Articles

Distinct modes of cell death by ionizing radiation observed in two lines of feline T-lymphocytes

Kakizaki, Takehiko; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Sakashita, Tetsuya; Hodatsu, Tsutomu*; Sano, Tadashi*; Natsuhori, Masahiro*; Kobayashi, Yasuhiko; Ito, Nobuhiko*

Journal of Radiation Research, 47(3-4), p.237 - 243, 2006/11

no abstracts in English

Oral presentation

Modes of cell death of feline T lymphocytes by ionizing radiation

Funayama, Tomoo; Kakizaki, Takehiko; Wada, Seiichi; Hamada, Nobuyuki*; Sakashita, Tetsuya; Hodatsu, Tsutomu*; Yamada, Naoaki*; Sano, Tadashi*; Natsuhori, Masahiro*; Kobayashi, Yasuhiko; et al.

no journal, , 

Responses of two lines of feline T lymphocytes, FeT-J and FL-4, to ionizing radiation were examined in the present study. FL-4 cells, but not FeT-J, were persistently infected with feline immunodeficiency virus. Cells were irradiated with $$^{60}$$Co-$$gamma$$ rays at 2 Gy/min. Surviving fractions were evaluated with clonogenic assay. Apoptosis was detected using TdT-mediated dUTP-biotin nick end labeling (TUNEL) method. Changes in nuclear morphology of viable cells were evaluated by double staining with Hoechst 33342 and ethidium bromide. Mean surviving fractions of FL-4 cells were slightly higher than FeT-J for each radiation dose given. However, dose required to reduce to 63 % of surviving fraction was 1.9 Gy in both cell lines. TUNEL assay, however, revealed the maximum frequency of apoptosis in FL-4 cells ($$<$$20 %) was lower than in FeT-J cells ($$>$$40 %). The time of frequency peak of TUNEL-positive cells in FL-4 was shorter than that of FeT-J. FL-4 cells reached peak level within 24 hours after irradiation, but FeT-J cells needed later than 48 hours after irradiation. Exposure of FL-4 cells to $$gamma$$ rays resulted in the giant- and the multi- nucleus formation. Nuclear swelling occurred to less extent in FeT-J than FL-4 cells. In conclusion, we found the difference in cellular responses to radiation in two lines of feline T lymphocytes. Modes of cell death of FL-4 cells were non-apoptotic and more research would discover new mechanism associated with apoptosis.

Oral presentation

Cell killing effects of charged particles on feline T-lymphocytes

Kakizaki, Takehiko; Hamada, Nobuyuki*; Wada, Seiichi*; Sakashita, Tetsuya; Hara, Takamitsu*; Hodatsu, Tsutomu*; Natsuhori, Masahiro*; Sano, Tadashi*; Funayama, Tomoo; Fukamoto, Kana; et al.

no journal, , 

no abstracts in English

Oral presentation

Cell killing effects of charged particles on feline T-lymphocytes

Kakizaki, Takehiko; Hamada, Nobuyuki*; Wada, Seiichi*; Sakashita, Tetsuya; Funayama, Tomoo; Hodatsu, Tsutomu*; Natsuhori, Masahiro*; Sano, Tadashi*; Kobayashi, Yasuhiko; Ito, Nobuhiko*

no journal, , 

no abstracts in English

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