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Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress
SIMPLE SUMMARY: Sensitivity of Nile tilapia (Oreochromis niloticus) to cold stress represents a major concern for both aquaculture and theoretical study; however, the cellular and molecular mechanisms determining cold susceptibility of it remain largely unknown. In this study, we first estimated the...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9495169/ https://www.ncbi.nlm.nih.gov/pubmed/36139242 http://dx.doi.org/10.3390/ani12182382 |
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author | Liu, Ran Liu, Renyan Song, Guili Li, Qing Cui, Zongbin Long, Yong |
author_facet | Liu, Ran Liu, Renyan Song, Guili Li, Qing Cui, Zongbin Long, Yong |
author_sort | Liu, Ran |
collection | PubMed |
description | SIMPLE SUMMARY: Sensitivity of Nile tilapia (Oreochromis niloticus) to cold stress represents a major concern for both aquaculture and theoretical study; however, the cellular and molecular mechanisms determining cold susceptibility of it remain largely unknown. In this study, we first estimated the median survival time of juvenile Nile tilapia under exposure to lethal cold stress (12 °C). The fish were classified as cold-sensitive or cold-tolerant based on their behavioral manifestation after exposed to 12 °C for 3 days. Subsequently, histological, biochemical and gene expression analyses were performed for the fish with different cold resistance to explore the cellular and molecular events underlying cold susceptibility of Nile tilapia. We found that exposure of Nile tilapia to lethal cold stress caused systemic tissue structure changes, mitochondrial swelling and dysfunction, induction of apoptosis and endoplasmic reticulum (ER) stress-related genes and cell apoptosis. The extent of these adverse cellular and molecular events determines an individual’s ability to survive cold stress. Our data indicate that mitochondria dysfunction and mitochondria-mediated cell apoptosis are the main factors limiting Nile tilapia’s cold resistance. ABSTRACT: Inability of Nile tilapia (Oreochromis niloticus) to withstand cold stress represents a major economic concern, which restricts the culture area, limits the growing period and even results in mass mortality in cold seasons. However, the cellular and molecular mechanisms determining cold susceptibility of Nile tilapia remain largely unknown. In this study, we characterized the ability of juvenile Nile tilapia to survive lethal cold stress (12 °C) and the median survival time (LT50) of the experimental fish under exposure to 12 °C cold stress was estimated as 3.14 d. After being exposed to 12 °C for 3 d, the survivors that lost equilibrium (LE) and those that swam normally (NO) were regarded as cold-sensitive and cold-tolerant, respectively. The untreated (Ctrl), NO and LE fish were subjected to histological, biochemical and gene expression analyses to explore the cellular and molecular events underlying cold susceptibility of Nile tilapia. Exposure of Nile tilapia to lethal cold stress caused systemic tissue structure changes, mitochondrial swelling and dysfunction, induction of apoptosis and endoplasmic reticulum (ER) stress-related genes and cell apoptosis. The extent of these adverse cellular and molecular events determines an individual’s ability to survive cold stress. Our data indicate that mitochondria dysfunction and mitochondria-mediated cell apoptosis are the main factors limiting Nile tilapia’s cold resistance. |
format | Online Article Text |
id | pubmed-9495169 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-94951692022-09-23 Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress Liu, Ran Liu, Renyan Song, Guili Li, Qing Cui, Zongbin Long, Yong Animals (Basel) Article SIMPLE SUMMARY: Sensitivity of Nile tilapia (Oreochromis niloticus) to cold stress represents a major concern for both aquaculture and theoretical study; however, the cellular and molecular mechanisms determining cold susceptibility of it remain largely unknown. In this study, we first estimated the median survival time of juvenile Nile tilapia under exposure to lethal cold stress (12 °C). The fish were classified as cold-sensitive or cold-tolerant based on their behavioral manifestation after exposed to 12 °C for 3 days. Subsequently, histological, biochemical and gene expression analyses were performed for the fish with different cold resistance to explore the cellular and molecular events underlying cold susceptibility of Nile tilapia. We found that exposure of Nile tilapia to lethal cold stress caused systemic tissue structure changes, mitochondrial swelling and dysfunction, induction of apoptosis and endoplasmic reticulum (ER) stress-related genes and cell apoptosis. The extent of these adverse cellular and molecular events determines an individual’s ability to survive cold stress. Our data indicate that mitochondria dysfunction and mitochondria-mediated cell apoptosis are the main factors limiting Nile tilapia’s cold resistance. ABSTRACT: Inability of Nile tilapia (Oreochromis niloticus) to withstand cold stress represents a major economic concern, which restricts the culture area, limits the growing period and even results in mass mortality in cold seasons. However, the cellular and molecular mechanisms determining cold susceptibility of Nile tilapia remain largely unknown. In this study, we characterized the ability of juvenile Nile tilapia to survive lethal cold stress (12 °C) and the median survival time (LT50) of the experimental fish under exposure to 12 °C cold stress was estimated as 3.14 d. After being exposed to 12 °C for 3 d, the survivors that lost equilibrium (LE) and those that swam normally (NO) were regarded as cold-sensitive and cold-tolerant, respectively. The untreated (Ctrl), NO and LE fish were subjected to histological, biochemical and gene expression analyses to explore the cellular and molecular events underlying cold susceptibility of Nile tilapia. Exposure of Nile tilapia to lethal cold stress caused systemic tissue structure changes, mitochondrial swelling and dysfunction, induction of apoptosis and endoplasmic reticulum (ER) stress-related genes and cell apoptosis. The extent of these adverse cellular and molecular events determines an individual’s ability to survive cold stress. Our data indicate that mitochondria dysfunction and mitochondria-mediated cell apoptosis are the main factors limiting Nile tilapia’s cold resistance. MDPI 2022-09-12 /pmc/articles/PMC9495169/ /pubmed/36139242 http://dx.doi.org/10.3390/ani12182382 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Liu, Ran Liu, Renyan Song, Guili Li, Qing Cui, Zongbin Long, Yong Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress |
title | Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress |
title_full | Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress |
title_fullStr | Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress |
title_full_unstemmed | Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress |
title_short | Mitochondria Dysfunction and Cell Apoptosis Limit Resistance of Nile Tilapia (Oreochromis niloticus) to Lethal Cold Stress |
title_sort | mitochondria dysfunction and cell apoptosis limit resistance of nile tilapia (oreochromis niloticus) to lethal cold stress |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9495169/ https://www.ncbi.nlm.nih.gov/pubmed/36139242 http://dx.doi.org/10.3390/ani12182382 |
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