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Pandey A, Rajesh M, Baral P, Sarma D, Tripathi PH, Akhtar MS, Ciji A, Dubey MK, Pande V, Sharma P, Kamalam BS. Concurrent changes in thermal tolerance thresholds and cellular heat stress response reveals novel molecular signatures and markers of high temperature acclimation in rainbow trout. J Therm Biol 2021; 102:103124. [PMID: 34863487 DOI: 10.1016/j.jtherbio.2021.103124] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/27/2021] [Accepted: 10/30/2021] [Indexed: 01/31/2023]
Abstract
The objective of this study was to better understand the molecular mechanisms which regulate acclimatory responses and thermal safety margins of rainbow trout (Oncorhynchus mykiss) at temperatures above physiological optimum. For this, we investigated the time course of changes in critical thermal tolerance thresholds and associated hepatic and renal transcript abundance of molecular markers related to cellular stress response, during high temperature acclimation. The experimental fish were initially acclimated to 17 °C and later exposed to a gradually raised elevated temperature regime (22 °C) for a period of 30 days. CTmax, CTmin and mRNA expression of candidate markers were examined before the thermal challenge (T0) and over the time-course (days) of high temperature exposure (T1, T3, T7, T15 and T30). With respect to organismal response, CTmax was significantly elevated at T3, but the degree of gain in heat tolerance was not persistent. Contrarily, we observed a gradual loss in cold tolerance with highest CTmin estimate at T30. Based on the time-course of mRNA expression, the studied markers could be categorized into those which were persistently elevated (hsp70a, hsp70b, hspa5, hsp90a, hsp90b, stip1 and serpinh1 in kidney and hsp90b in liver); those which concurred with changes in CTmin (hspbp1, hsp90b, stip1, gr1, hif1a, hyou1, tnfa and tlr5 in kidney); and those which concurred with changes in CTmax (hsp90a, serpinh1, tlr5 and lmo2 in liver). Apparently, transcriptional changes in kidney and liver reflected CTmin and CTmax trend, respectively. Expression profile of stip1 and tlr5 suggest that they are potential novel markers which could reflect thermal limits in rainbow trout. Hepatic metabolic markers were either initially elevated (alt, glud, g6pase1) or down-regulated at different time-points (ast2, gls1, fas, cpt1b, mtor), linked to gluconeogenesis and metabolic depression, respectively. Whereas, growth-axis markers showed no significant differences. Overall, this time-course analysis has revealed potential associations in organismal and tissue-specific cellular response to high temperature acclimation in a thermally sensitive coldwater ectotherm.
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Affiliation(s)
- Anupam Pandey
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India; Department of Biotechnology, Kumaun University, Bhimtal, 263136, Uttarakhand, India
| | - Manchi Rajesh
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Pratibha Baral
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Debajit Sarma
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Priyanka H Tripathi
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India; Department of Biotechnology, Kumaun University, Bhimtal, 263136, Uttarakhand, India
| | - Md Shahbaz Akhtar
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Alexander Ciji
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Maneesh Kumar Dubey
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Veena Pande
- Department of Biotechnology, Kumaun University, Bhimtal, 263136, Uttarakhand, India
| | - Prakash Sharma
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Biju Sam Kamalam
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India.
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Transcriptome analysis provides the first insight into the molecular basis of temperature plasticity in Banggai cardinalfish, Pterapogon kauderni. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2021; 40:100909. [PMID: 34479169 DOI: 10.1016/j.cbd.2021.100909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/22/2021] [Accepted: 08/22/2021] [Indexed: 01/11/2023]
Abstract
Banggai cardinalfish, Pterapogon kauderni, is a tropical fish listed as an endangered species by IUCN. Its distribution and survival condition are extremely limited, and the changes of living environment caused by global warming may seriously threaten its geographical distribution. In order to understand the survival temperature range and the potential mechanism of temperature plasticity of P. kauderni, transcriptome analysis was performed under five temperature conditions (18 °C, 22 °C, 26 °C, 30 °C and 34 °C). A total of 432,444,497 clean reads were obtained from the mix tissues of whole head, viscera (except intestine), and muscle. All clean data were spliced into 194,832 unigenes. Compared with 26 °C, 57, 107, 187 and 174 differentially expressed genes (DEGs) were obtained at 18 °C, 22 °C, 30 °C and 34 °C, respectively. Gene Ontology (GO) analysis showed the most highly enriched in the DEGs were cellular processes, binding, metabolic processes and biological regulation. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis indicated circadian rhythm, protein processing in endoplasmic reticulum, influenza A and prion disease were significantly enriched. 47 genes that may be related to temperature stress were identified, such as Per1, MLP, IGFBP1, HSP70, HSP90α, HSPA4, DNAJB1, CALR. This is the first RNA-Seq study of P. kauderni. This information should be valuable for further targeted studies on temperature tolerance, thereby assisting the protection and development of P. kauderni.
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Beemelmanns A, Zanuzzo FS, Sandrelli RM, Rise ML, Gamperl AK. The Atlantic salmon's stress- and immune-related transcriptional responses to moderate hypoxia, an incremental temperature increase, and these challenges combined. G3 (BETHESDA, MD.) 2021; 11:jkab102. [PMID: 34015123 PMCID: PMC8613830 DOI: 10.1093/g3journal/jkab102] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/29/2021] [Indexed: 12/13/2022]
Abstract
The marine environment is predicted to become warmer, and more hypoxic, and these conditions may negatively impact the health and survival of coastal fish species, including wild and farmed Atlantic salmon (Salmo salar). Thus, we examined how: (1) moderate hypoxia (∼70% air saturation) at 12°C for 3 weeks; (2) an incremental temperature increase from 12°C to 20°C (at 1°C week-1) followed by 4 weeks at 20°C; and (3) treatment "2" combined with moderate hypoxia affected transcript expression in the liver of post-smolts as compared to control conditions (normoxia, 12°C). Specifically, we assessed the expression of 45 genes related to the heat shock response, oxidative stress, apoptosis, metabolism and immunity using a high-throughput qPCR approach (Fluidigm Biomark™ HD). The expression profiles of 27 "stress"-related genes indicated that: (i) moderate hypoxia affected the expression of several stress genes at 12°C; (ii) their expression was impacted by 16°C under normoxic conditions, and this effect increased until 20°C; (iii) the effects of moderate hypoxia were not additive to those at temperatures above 16°C; and (iv) long-term (4 weeks) exposure to 20°C, with or without hypoxia, resulted in a limited acclimatory response. In contrast, the expression of 15 immune-related genes was not greatly affected until temperatures reached 20°C, and this effect was particularly evident in fish exposed to the added challenge of hypoxia. These results provide valuable information on how these two important environmental factors affect the "stress" physiology and immunology of Atlantic salmon, and we identify genes that may be useful as hypoxia and/or temperature biomarkers in salmonids and other fishes.
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Affiliation(s)
- Anne Beemelmanns
- Department of Ocean Sciences, Memorial University,
St. John’s, NL A1C 5S7, Canada
| | - Fábio S Zanuzzo
- Department of Ocean Sciences, Memorial University,
St. John’s, NL A1C 5S7, Canada
| | - Rebeccah M Sandrelli
- Department of Ocean Sciences, Memorial University,
St. John’s, NL A1C 5S7, Canada
| | - Matthew L Rise
- Department of Ocean Sciences, Memorial University,
St. John’s, NL A1C 5S7, Canada
| | - A Kurt Gamperl
- Department of Ocean Sciences, Memorial University,
St. John’s, NL A1C 5S7, Canada
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Crichigno SA, Orellana M, Larraza R, Mirenna G, Cussac VE. Thermal effects in rainbow trout (Oncorhynchus mykiss) F1 embryos (farmed female × wild thermal-resistant male). JOURNAL OF FISH BIOLOGY 2021; 99:197-205. [PMID: 33625760 DOI: 10.1111/jfb.14711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 06/12/2023]
Abstract
The aim of this work was to investigate the response of rainbow trout embryos (Oncorhynchus mykiss) (i.e., survival, size at hatching, time to hatching, malformations) to four incubation temperatures (5.8, 8.9, 14.0 and 16.8°C), taking into account the origin of the male parental genome and comparing pure farmed and F1 embryos (farmed female × wild thermal-resistant male). Several consequences of thermal stress were observed: lower accumulated thermal units (ATU) at hatching at high temperatures, and lower survival, shorter hatched free embryos and less-consumed yolk sac at extreme temperatures. The effect of the thermal-adapted male parental genome was shown only in the lower percentage of incompletely hatched free embryos in the F1 families. It appears that to obtain greater modification of thermal performance during early development, the adapted genome of the wild thermal-resistant population has to be included through maternal inheritance, thus producing a stabilized strain selected for domesticity, growth and thermal adaptation.
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Affiliation(s)
- Sonia A Crichigno
- Instituto Patagónico de Tecnologías Biológicas y Geoambientales, Universidad Nacional del Comahue - Consejo Nacional de Investigaciones Científicas y Técnicas, Bariloche, Argentina
| | - Mabel Orellana
- Centro de Salmonicultura Bariloche, Universidad Nacional del Comahue, Neuquen, Argentina
| | - Rodrigo Larraza
- Centro de Salmonicultura Bariloche, Universidad Nacional del Comahue, Neuquen, Argentina
| | - Guillermo Mirenna
- Centro de Salmonicultura Bariloche, Universidad Nacional del Comahue, Neuquen, Argentina
| | - Víctor E Cussac
- Instituto Patagónico de Tecnologías Biológicas y Geoambientales, Universidad Nacional del Comahue - Consejo Nacional de Investigaciones Científicas y Técnicas, Bariloche, Argentina
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Beemelmanns A, Zanuzzo FS, Xue X, Sandrelli RM, Rise ML, Gamperl AK. The transcriptomic responses of Atlantic salmon (Salmo salar) to high temperature stress alone, and in combination with moderate hypoxia. BMC Genomics 2021; 22:261. [PMID: 33845767 PMCID: PMC8042886 DOI: 10.1186/s12864-021-07464-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 02/22/2021] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Increases in ocean temperatures and in the frequency and severity of hypoxic events are expected with climate change, and may become a challenge for cultured Atlantic salmon and negatively affect their growth, immunology and welfare. Thus, we examined how an incremental temperature increase alone (Warm & Normoxic-WN: 12 → 20 °C; 1 °C week- 1), and in combination with moderate hypoxia (Warm & Hypoxic-WH: ~ 70% air saturation), impacted the salmon's hepatic transcriptome expr\ession compared to control fish (CT: 12 °C, normoxic) using 44 K microarrays and qPCR. RESULTS Overall, we identified 2894 differentially expressed probes (DEPs, FDR < 5%), that included 1111 shared DEPs, while 789 and 994 DEPs were specific to WN and WH fish, respectively. Pathway analysis indicated that the cellular mechanisms affected by the two experimental conditions were quite similar, with up-regulated genes functionally associated with the heat shock response, ER-stress, apoptosis and immune defence, while genes connected with general metabolic processes, proteolysis and oxidation-reduction were largely suppressed. The qPCR assessment of 41 microarray-identified genes validated that the heat shock response (hsp90aa1, serpinh1), apoptosis (casp8, jund, jak2) and immune responses (apod, c1ql2, epx) were up-regulated in WN and WH fish, while oxidative stress and hypoxia sensitive genes were down-regulated (cirbp, cyp1a1, egln2, gstt1, hif1α, prdx6, rraga, ucp2). However, the additional challenge of hypoxia resulted in more pronounced effects on heat shock and immune-related processes, including a stronger influence on the expression of 14 immune-related genes. Finally, robust correlations between the transcription of 19 genes and several phenotypic traits in WH fish suggest that changes in gene expression were related to impaired physiological and growth performance. CONCLUSION Increasing temperature to 20 °C alone, and in combination with hypoxia, resulted in the differential expression of genes involved in similar pathways in Atlantic salmon. However, the expression responses of heat shock and immune-relevant genes in fish exposed to 20 °C and hypoxia were more affected, and strongly related to phenotypic characteristics (e.g., growth). This study provides valuable information on how these two environmental challenges affect the expression of stress-, metabolic- and immune-related genes and pathways, and identifies potential biomarker genes for improving our understanding of fish health and welfare.
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Affiliation(s)
- Anne Beemelmanns
- Department of Ocean Sciences, Memorial University, St. John's, NL, A1C 5S7, Canada.
- Current Address: Département de Biologie, Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec City, QC, G1V 0A6, Canada.
| | - Fábio S Zanuzzo
- Department of Ocean Sciences, Memorial University, St. John's, NL, A1C 5S7, Canada
| | - Xi Xue
- Department of Ocean Sciences, Memorial University, St. John's, NL, A1C 5S7, Canada
| | - Rebeccah M Sandrelli
- Department of Ocean Sciences, Memorial University, St. John's, NL, A1C 5S7, Canada
| | - Matthew L Rise
- Department of Ocean Sciences, Memorial University, St. John's, NL, A1C 5S7, Canada
| | - A Kurt Gamperl
- Department of Ocean Sciences, Memorial University, St. John's, NL, A1C 5S7, Canada.
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