title: Effects of heavy-ion radiosurgery on the hemopoietic function of the silkworm Bombyx mori.
abstract: To study the effects of heavy-ion radiosurgery on the hemopoietic function of a silkworm, hemopoietic organs of larvae were locally irradiated with carbon-ion beams, and the changes in the hemocyte density and in the hemocyte function were investigated. When the larvae were irradiated by 50 Gy to 300 Gy carbon ions on the 3rd day of the 4th instar, the hemocyte densities did not change for a while, though they gradually increased at a later stage, but were finally still significantly lower than those of unirradiated controls. The hemocyte densities of the larvae irradiated at different developmental stages showed suppressed increments, and carbon-ion irradiation given to larvae at early stages compared to the later stages had a significant suppressive effect on the hemocyte densities. On unilateral irradiated larvae a hemocyte intermediate increment between those of bilateral irradiated larvae and unirradiated controls was observed. The percentage of dead hemocytes was obviously higher for irradiated larvae than unirradiated controls during the later 5th instar. Thus, it is evident that carbon-ion radiosurgery on hemopoietic organs of silkworm induced not only a quantitative change, but also a qualitative change in the hemocytes.
authors.affiliation: Department of Radiation Research for Environment and Resources, Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute (JAERI), Watanukimachi 1233, Takasaki, Gunma 370- 1292, Japan. tu514@yahoo.co.jp
authors.forename: Zhen-Li
authors.initials: ZL
authors.lastname: Tu
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Kenji
authors.initials: K
authors.lastname: Kiguchi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Watanabe
authors.forename: Kazuo
authors.initials: K
authors.lastname: Yamamoto
mesh_terms: D000818:Animals; D012831:Bombyx / Q000528:radiation effects*; D002244:Carbon; D002470:Cell Survival / Q000528:radiation effects; D020450:Heavy Ions; D006410:Hematopoiesis / Q000528:radiation effects*; D006413:Hematopoietic System / Q000601:surgery*; D006434:Hemocytes / Q000502:physiology; D007814:Larva / Q000166:cytology / Q000528:radiation effects; D016634:Radiosurgery
chemical_list: D002244:Carbon