HT-2毒素是一种霉菌毒素,可影响胃和肠道病变,造血和免疫抑制作用,厌食症,嗜睡,恶心。最近,新出现的证据表明,HT-2也扰乱生殖系统。在这项研究中,我们研究了HT-2毒素暴露对猪卵母细胞细胞器的影响。结果发现HT-2治疗后内质网异常分布增加,随着核糖体蛋白RPS3和GRP78表达的扰动;高尔基体显示扩散定位模式,GM130定位也受损,从而影响基于Rab10的囊泡运输;由于核糖体的损伤,ER,和高尔基体,溶酶体的蛋白质供应受到阻碍,导致溶酶体损伤,这进一步破坏了基于LC3的自噬。此外,结果表明,线粒体的功能和分布也受到HT-2毒素的影响,显示线粒体碎片,降低了TMRE和ATP水平。一起来看,我们的研究表明,HT-2毒素暴露会对内膜系统的细胞器造成损害,进一步抑制猪卵母细胞的减数分裂成熟。
HT-2 toxin is a type of mycotoxin which is shown to affect gastric and intestinal lesions, hematopoietic and immunosuppressive effects, anorexia, lethargy, nausea. Recently, emerging evidences indicate that HT-2 also disturbs the reproductive system. In this study, we investigated the impact of HT-2 toxin exposure on the organelles of porcine oocytes. Our results found that the abnormal distribution of endoplasmic reticulum increased after HT-2 treatment, with the perturbation of ribosome protein RPS3 and GRP78 expression; Golgi apparatus showed diffused localization pattern and GM130 localization was also impaired, thereby affecting the Rab10-based vesicular transport; Due to the impairment of ribosomes, ER, and Golgi apparatus, the protein supply to lysosomes was hindered, resulting in lysosomal damage, which further disrupted the LC3-based autophagy. Moreover, the results indicated that the function and distribution of mitochondria were also affected by HT-2 toxin, showing with fragments of mitochondria, decreased TMRE and ATP level. Taken together, our study suggested that HT-2 toxin exposure induces damage to the organelles for endomembrane system, which further inhibited the meiotic maturation of porcine oocytes.