氯霉素对斑马鱼幼鱼发育及免疫毒性的研究

以野生型及转基因Tg(lyz:EGFP)斑马鱼幼鱼为研究对象,研究氯霉素对斑马鱼幼鱼的发育毒性及对免疫细胞的影响。用不同浓度的氯霉素分别处理72 h,观察斑马鱼幼鱼的生存率、畸形率和形态变化,以及标记绿色荧光免疫细胞在斑马鱼幼鱼中的数量。结果显示,随着氯霉素浓度(≥100 mg/L)的升高和暴露时间的延长,斑马鱼的存活率和孵化率降低,死亡率升高;氯霉素对斑马鱼幼鱼的致畸作用,主要表现为心包水肿、卵黄囊水肿、脊柱弯曲;通过对Tg(lyz:EGFP)品系的观察,发现氯霉素(≥75 mg/L)可以降低斑马鱼幼鱼免疫细胞的数量。研究表明,氯霉素对斑马鱼幼鱼的致畸和致死作用具有剂量、时间依赖性,并可以导致斑马鱼幼鱼的免疫细胞数量减少,具有免疫毒性。

Research on the effects of chloramphenicol on developmental and immune toxicity of juvenile zebrafish

The impact of chloramphenicol on developmental toxicity and immune cells of wild and transgenic Tg(lyz:EGFP) juvenile zebrafish was investigated. After treated separately with different concentrations of chloramphenicol for 72 hours, the survival rate, abnormal rate, morphology variation of juvenile zebrafish, and the number of immune cells labeled with green fluorescent in juvenile zebrafish were observed. The results showed that with the increase of the concentration of chloramphenicol (≥100 mg/L) and the exposure time, the survival rate and hatching rate of zebrafish decreased, and mortality increased. The teratogenic effects of chloramphenicol on juvenile zebrafish included yolk sac edema, pericardial edema and spinal curvature. Through observation of the transgenic strain Tg(lyz:EGFP), it was found that chloramphenicol (≥75 mg/L) could inhibit the number of immune cells in zebrafish. This study showed that chloramphenicol had teratogenic and lethal effects on juvenile zebrafish in a time dependent and dose dependent manner. And chloramphenicol had immune toxicity, which could reduce the number of immune cells in juvenile zebrafish.