Effect of ionizing radiation at low dose on transgenerational carcinogenesis by epigenetic regulation.

The objective of this study was to determine the effect of ionizing radiation (IR) exposure of parents on carcinogenesis of the next generation focusing on the epigenetic perspective to clarify the relationship between radiation dose and carcinogenesis in F1 generation SD rats. F1 generations from pregnant rats (F0) who were exposed to gamma rays were divided into three groups according to the dose of radiation: 10 rad, 30 rad, and untreated. They were intraperitoneally injected with 50 mg/kg of diethylnitrosamine (DEN).

Subglottic wound healing in a new rabbit model of acquired subglottic stenosis.

Objectives: It is difficult to develop models of subglottic stenosis in small animals that ensure reliable stenosis. We therefore sought to establish a new animal model of subglottic stenosis in rabbits and observe subglottic wound healing.

Methods: Using a diode laser under endoscopic visualization after anterior tracheal incision, we induced full-thickness injury to the subglottis in 60 rabbits: 20 on the anterior 120 degrees, 20 on the posterior 120 degrees, and 20 circumferentially.