PMID- 36268226 OWN - NLM STAT- MEDLINE DCOM- 20221024 LR - 20221222 IS - 2235-2988 (Electronic) IS - 2235-2988 (Linking) VI - 12 DP - 2022 TI - Development of a high-sensitivity and short-duration fluorescence in situ hybridization method for viral mRNA detection in HEK 293T cells. PG - 960938 LID - 10.3389/fcimb.2022.960938 [doi] LID - 960938 AB - Coronavirus disease 2019 (COVID-19) is an extremely contagious illness caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Early disease recognition of COVID-19 is crucial not only for prompt diagnosis and treatment of the patients, but also for effective public health surveillance and response. The reverse transcription-polymerase chain reaction (RT-PCR) is the most common method for the detection of SARS-CoV-2 viral mRNA and is regarded as the gold standard test for COVID-19. However, this test and those for antibodies (IgM and IgG) and antigens have certain limitations (e.g., by yielding false-negative and false-positive results). We have developed an RNA fluorescence in situ hybridization (FISH) method for high-sensitivity detection of SARS-CoV-2 mRNAs in HEK 293T cell cultures as a model. After transfection of HEK 293T cells with plasmids, Spike (S)/envelope (E) proteins and their mRNAs were clearly detected inside the cells. In addition, hybridization time could be reduced to 2 hours for faster detection when probe concentration was increased. Our approach might thus significantly improve the sensitivity and specificity of SARS-CoV-2 detection and be widely applied for the high-sensitivity single-molecular detection of other RNA viruses (e.g., Middle East respiratory syndrome coronavirus (MERS-CoV), Hepatitis A virus, all influenza viruses, and human immunodeficiency virus (HIV)) in various types of samples including tissue, body fluid, blood, and water. RNA FISH can also be utilized for the detection of DNA viruses (e.g., Monkeypox virus, human papillomavirus (HPV), and cytomegalovirus (CMV)) by detection of their mRNAs inside cells or body fluid. CI - Copyright (c) 2022 Hu, Wang, Uddin, Greene, Hu and Ma. FAU - Hu, Dailun AU - Hu D AD - Clinical College, Hebei Medical University, Shijiazhuang, China. FAU - Wang, Tao AU - Wang T AD - Telethon Kids Institute, Perth Children's Hospital, Nedlands, WA, Australia. AD - Medical School, University of Western Australia, Nedlands, WA, Australia. FAU - Uddin, Jasim AU - Uddin J AD - School of Veterinary Medicine, Murdoch University, Murdoch, WA, Australia. FAU - Greene, Wayne K AU - Greene WK AD - Medical, Molecular and Forensic Sciences, Murdoch University, Murdoch, WA, Australia. FAU - Hu, Dakang AU - Hu D AD - Department of Laboratory Medicine, Taizhou Municipal Hospital, Taizhou, China. FAU - Ma, Bin AU - Ma B AD - Medical, Molecular and Forensic Sciences, Murdoch University, Murdoch, WA, Australia. LA - eng PT - Journal Article DEP - 20221004 PL - Switzerland TA - Front Cell Infect Microbiol JT - Frontiers in cellular and infection microbiology JID - 101585359 RN - 0 (RNA, Messenger) RN - 0 (Immunoglobulin M) RN - 0 (Immunoglobulin G) RN - 059QF0KO0R (Water) SB - IM MH - Humans MH - *SARS-CoV-2/genetics MH - *COVID-19 MH - COVID-19 Testing MH - Clinical Laboratory Techniques/methods MH - RNA, Messenger/genetics MH - In Situ Hybridization, Fluorescence MH - HEK293 Cells MH - Immunoglobulin M MH - Immunoglobulin G MH - Water PMC - PMC9577401 OTO - NOTNLM OT - HEK 293T cell OT - RNA virus OT - SARS-CoV-2 OT - fluorescence in situ hybridization OT - mRNA COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/10/22 06:00 MHDA- 2022/10/25 06:00 PMCR- 2022/10/04 CRDT- 2022/10/21 03:11 PHST- 2022/06/03 00:00 [received] PHST- 2022/09/20 00:00 [accepted] PHST- 2022/10/21 03:11 [entrez] PHST- 2022/10/22 06:00 [pubmed] PHST- 2022/10/25 06:00 [medline] PHST- 2022/10/04 00:00 [pmc-release] AID - 10.3389/fcimb.2022.960938 [doi] PST - epublish SO - Front Cell Infect Microbiol. 2022 Oct 4;12:960938. doi: 10.3389/fcimb.2022.960938. eCollection 2022.