Title

Radiation-induced Bystander Effect in Starfish (Patiria pectinifera) Oocytes.

Authors

Chiba, Haruki; Horikawa, Hinata; Goh, Valerie Swee Ting; Miura, Tomisato; Ariyoshi, Kentaro

Abstract

Although multiple studies suggest that ionizing radiation can induce bystander effects (radiation-induced bystander effect, RIBE) in cultured cell lines, it is still unclear whether RIBE is evolutionarily conserved in invertebrates. In this study, we investigated the frequency of cell death of unirradiated starfish (Patiria pectinifera) oocytes co-cultured with oocytes irradiated with X rays (0, 2 and 4 Gy). We observed increased frequencies of cell death determined by morphological abnormality and TUNEL-positive cells in unirradiated oocytes co-cultured with oocytes irradiated with 2 Gy or 4 Gy oocytes. In addition, the seawater cultured with 4 Gy irradiated oocytes induced cell death in unirradiated oocytes, and TUNEL-positive cells were observed. Our results suggest that RIBE is evolutionarily conserved in starfish.

Subjects

RADIATION-induced bystander effect; X-rays; CELL death; IONIZING radiation; OVUM

Publication

Radiation Research, 2025, Vol 203, Issue 1, p53

ISSN

0033-7587

Publication type

Academic Journal

DOI

10.1667/RADE-23-00198.1