PMID- 38462166 OWN - NLM STAT- Publisher LR - 20240312 IS - 1096-0805 (Electronic) IS - 0022-2011 (Linking) VI - 204 DP - 2024 Mar 9 TI - Overcoming research challenges: In vitro cultivation of Ameson portunus (Phylum Microsporidia). PG - 108091 LID - S0022-2011(24)00034-X [pii] LID - 10.1016/j.jip.2024.108091 [doi] AB - Ameson portunus is an intracellular pathogen that infects marine crabs Portunus trituberculatus and Scylla paramamosain, causing significant economic losses. However, research into this important parasite has been limited due to the absence of an in vitro culture system. To address this challenge, we developed an in vitro cultivation model of A. portunus using RK13 cell line in this study. The fluorescent labeling assay indicated a high infection rate ( approximately 60 %) on the first day post-infection and quantitative PCR (qPCR) detection demonstrated successful infection as early as six hours post-inoculation. Fluorescence in situ hybridization (FISH) and qPCR were used for the detection of A. portunus infected cells. The FISH probe we designed allowed detection of A. portunus in infected cells and qPCR assay provided accurate quantification of A. portunus in the samples. Transmission electron microscopy (TEM) images revealed that A. portunus could complete its entire life cycle and produce mature spores in RK13 cells. Additionally, we have identified novel life cycle characteristics during the development of A. portunus in RK 13 cells using TEM. These findings contribute to our understanding of new life cycle pathways of A. portunus. The establishment of an in vitro culture model for A. portunus is critical as it provides a valuable tool for understanding the molecular and immunological events that occur during infection. Furthermore, it will facilitate the development of effective treatment strategies for this intracellular pathogen. CI - Copyright (c) 2024. Published by Elsevier Inc. FAU - Fu, Ming AU - Fu M AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; Marine College, Shandong University, Weihai 264209, China. FAU - Qu, Hongnan AU - Qu H AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Wang, Yongliang AU - Wang Y AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Guan, Jingyu AU - Guan J AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Xia, Tian AU - Xia T AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Zheng, Kai AU - Zheng K AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Tang, Liyuan AU - Tang L AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Zhou, Chunxue AU - Zhou C AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Zhou, Huaiyu AU - Zhou H AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. FAU - Cong, Wei AU - Cong W AD - Marine College, Shandong University, Weihai 264209, China. Electronic address: messicw@163.com. FAU - Zhang, Jinyong AU - Zhang J AD - School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China. Electronic address: zhangjy@ihb.ac.cn. FAU - Han, Bing AU - Han B AD - Department of Pathogenic Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China. Electronic address: bing.han@sdu.edu.cn. LA - eng PT - Journal Article DEP - 20240309 PL - United States TA - J Invertebr Pathol JT - Journal of invertebrate pathology JID - 0014067 SB - IM OTO - NOTNLM OT - In vitro model OT - Intracellular pathogen OT - Marine crabs OT - Novel life cycle OT - RK13 cells COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2024/03/11 00:42 MHDA- 2024/03/11 00:42 CRDT- 2024/03/10 20:18 PHST- 2023/08/24 00:00 [received] PHST- 2023/12/03 00:00 [revised] PHST- 2024/03/06 00:00 [accepted] PHST- 2024/03/11 00:42 [pubmed] PHST- 2024/03/11 00:42 [medline] PHST- 2024/03/10 20:18 [entrez] AID - S0022-2011(24)00034-X [pii] AID - 10.1016/j.jip.2024.108091 [doi] PST - aheadofprint SO - J Invertebr Pathol. 2024 Mar 9;204:108091. doi: 10.1016/j.jip.2024.108091.