Infectivity and genes differentially expressed between young and aging theront cells of the marine fish parasiteCryptocaryon irritans
文献类型： 外文期刊
作者： Chi, Hongshu 1 ; Goldstein, Michael 2 ; Pichardo, Angel 2 ; Wei, Zung-Hang 3 ; Chang, Wei-Jen 2 ; Gong, Hui 1 ;
作者机构： 1.Fujian Acad Agr Sci, Biotechnol Inst, Fuzhou, Fujian, Peoples R China
2.Hamilton Coll, Dept Biol, Clinton, NY 13323 USA
3.Zhengzhou Univ, Sch Mech & Engn Sci, Zhengzhou, Henan, Peoples R China
4.State Key Lab Large Yellow Croaker Breeding, Ningde, Fujian, Peoples R China
5.Ningbo Univ, Sch Marine Sci, Ningbo, Zhejiang, Peoples R China
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2020 年 15 卷 8 期
页码：
收录情况： SCI
摘要： The ciliated protozoanCryptocaryon irritansinfects a wide range of marine fish and causes the highly lethal white spot disease. This parasite possesses three morphologically and physiologically distinct life stages: an infectious theront, a parasitic trophont, and an asexually reproductive tomont. In the past few years, several attempts have been made to help elucidate how C. irritans transforms from one stage to another using transcriptomic or proteomic approaches. However, there has been no research studying changes in transcription profiles between different time points of a singleC.irritanslife stage-the development of this parasite. Here we use RNA-seq and compare gene expression profiles of theront cells collected by 1 and 10 hrs after they emerged from tomonts. It has been shown that infectivity of theront cells declines 6-8 hours post-emergence, and we used this characteristic as a physiological marker to confirm the aging of theront cells. We identified a total of 41 upregulated and 90 downregulated genes that were differentially expressed between young and aging theront cells. Using Blast2Go to further analyze functions of these genes, we show that genes related to energy production are downregulated, but quite surprisingly many genes involved in transcription/translation processes are upregulated. We also show that expression of all nine detectable agglutination/immobilization antigen genes, with great sequence divergence, is invariably downregulated. Functions of other differentially expressed genes and indications are also discussed in our study.
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