PMID- 35237413 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221222 IS - 2045-452X (Print) IS - 2045-4538 (Electronic) IS - 2045-452X (Linking) VI - 11 IP - 1 DP - 2022 Feb TI - JC-10 probe as a novel method for analyzing the mitochondrial membrane potential and cell stress in whole zebrafish embryos. PG - 77-87 LID - 10.1093/toxres/tfab114 [doi] AB - BACKGROUND: A sensitive method to investigate cellular stress and cytotoxicity is based on measuring mitochondrial membrane potential. Recently, JC-10, was developed to measure mitochondrial membrane potential in vitro and used as an indicator for cytotoxicity. Yet, JC-10 has never been used in vivo (whole organism). In normal cells, JC-10 concentrates in the mitochondrial matrix, where it forms red fluorescent aggregates. However, in apoptotic/necrotic cells, JC-10 diffuses out of the mitochondria, changes to monomeric form, and stains cells in green. Here, we aimed to develop and optimize a JC-10 assay to measure cytotoxicity in zebrafish embryo. We also investigated the effectiveness of JC-10 assay by comparing it to common cytotoxicity assays. METHODS: Zebrafish embryos were exposed to a toxic surfactant AEO-7 at no observed effect concentration (6.4 mug/L), and then cytotoxicity was measured using (i) JC-10 mitochondrial assay, (ii) acridine orange (AO), (iii) TUNEL assay, and (iv) measuring the level of Hsp70 by western blotting. RESULTS: As compared to the negative control, embryos treated with NOEC of AEO-7 did not show significant cytotoxicity when assessed by AO, TUNEL or western blotting. However, when JC-10 was used under the same experimental conditions, a significant increase of green:red fluorescent ratio signal was detected in the AEO-7 treated embryos, indicating mitochondrial damage and cellular cytotoxicity. Noteworthy, the observed green: red ratio increase was dose dependent, suggesting specificity of the JC-10 assay. CONCLUSION: JC-10 is a sensitive in vivo method, thus, can be used as surrogate assay to measure cytotoxicity in whole zebrafish embryos. CI - (c) The Author(s) 2021. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com. FAU - Younes, Nadin AU - Younes N AD - Biomedical Research Center, QU Health, Qatar University, P.O. Box 2713 Doha, Qatar. FAU - Alsahan, Bana S AU - Alsahan BS AD - Department of Biomedical Science, College of Health Sciences, QU Health, Qatar University, P.O. Box 2713 Doha, Qatar. FAU - Al-Mesaifri, Asmaa J AU - Al-Mesaifri AJ AD - Department of Biomedical Science, College of Health Sciences, QU Health, Qatar University, P.O. Box 2713 Doha, Qatar. FAU - Da'as, Sahar I AU - Da'as SI AD - Department of Human Genetics, Sidra Medicine, P.O. Box 26999, Doha, Qatar. FAU - Pintus, Gianfranco AU - Pintus G AD - Department of Medical Laboratory Sciences, University of Sharjah, P.O. Box 27272 Sharjah, United Arab Emirates. FAU - Majdalawieh, Amin F AU - Majdalawieh AF AD - Department of Biology, Chemistry, and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, P.O. Box 26666 Sharjah, United Arab Emirates. FAU - Nasrallah, Gheyath K AU - Nasrallah GK AUID- ORCID: 0000-0001-9252-1038 AD - Biomedical Research Center, QU Health, Qatar University, P.O. Box 2713 Doha, Qatar. LA - eng PT - Journal Article DEP - 20211221 PL - England TA - Toxicol Res (Camb) JT - Toxicology research JID - 101587950 PMC - PMC8882781 OTO - NOTNLM OT - AEO-7 OT - JC-10 probe OT - cytotoxicity OT - mitochondria OT - zebrafish EDAT- 2022/03/04 06:00 MHDA- 2022/03/04 06:01 PMCR- 2022/12/21 CRDT- 2022/03/03 05:35 PHST- 2021/01/22 00:00 [received] PHST- 2021/10/22 00:00 [revised] PHST- 2021/11/03 00:00 [accepted] PHST- 2022/03/03 05:35 [entrez] PHST- 2022/03/04 06:00 [pubmed] PHST- 2022/03/04 06:01 [medline] PHST- 2022/12/21 00:00 [pmc-release] AID - tfab114 [pii] AID - 10.1093/toxres/tfab114 [doi] PST - epublish SO - Toxicol Res (Camb). 2021 Dec 21;11(1):77-87. doi: 10.1093/toxres/tfab114. eCollection 2022 Feb.