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CgGH and IGF-1 expression level and growth response of G4 transgenic mutiara strain catfish (Clarias gariepinus) reared at different stocking densities

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Abstract

This study aimed to evaluate the growth response of G4 transgenic mutiara catfish reared at different stocking densities. The relative expression ratio levels of CgGH/ß-actin and IGF-1/ß-actin mRNA was measured using quantitative real-time PCR (qRT-P CR) in G4 mutiara catfish. Fish were kept for 8 weeks at different stocking densities (treatment A, 15 fish/100 L; B, 12 fish/100 L; C, 10 fish/100 L for transgenic fish; and A*, 15 fish/100 L for non-transgenic fish). The average increase in body weight of G4 mutiara catfish was 1.9–2.3 times higher compared to non-transgenic mutiara catfish at the same stocking densities. The growth response indicates an overexpression of the growth hormone (GH) in G4 mutiara catfish, displaying expression levels 1.3–2.9 higher than in non-transgenic fish. The use of high stocking density (treatment A, 15 fish/100 L) induced overexpression of the exogenous GH (CgGH) and increased the body protein content, as well as improved the feed conversion ratio, protein retention value, and fish protein efficiency ratio, leading to faster body weight gain of G4 transgenic versus non-transgenic mutiara catfish. The growth of G4 catfish in treatments B and C remained higher than in treatment A* (non-transgenic fish), but the growth of non-transgenic catfish was slower. The induction of the CgGH expression level caused an increase in the growth, protein retention, protein efficiency ratio, and IGF-1 expression level of G4 transgenic mutiara catfish. The permanent inheritance of CgGH in G4 fish has the potential to increase the mass production of commercial catfish culture.

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All data generated or analyzed during this study are included in this published article.

We would like to confirm that there are no known conflicts of interest associated with this publication and there has been no significant financial support for this work that could have influenced its outcome. We confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that the order of authors listed in the manuscript has been approved by all of us.

Abbreviations

CgGH :

Clarias gariepinus growth hormone

FCR :

Feed conversion ratio

GH :

Growth hormone

HSP70:

Heat shock protein 70

opAFP-ccGH:

Ocean pout antifreeze protein channel catfish GH cDNA

opAFP-GHc2:

Ocean pout antifreeze protein Chinook salmon GH cDNA

pAct-MELO:

Plasmid medaka ß-actin promoter masu salmon elongase gene

pCAgcGH:

Plasmid Carp actin grass carp growth hormone

pCMV-CgGH :

Plasmid Cytomegalovirus Clarias gariepinus growth hormone

pCMV-luc:

Plasmid Cytomegalovirus Luciferase mammalian expression reporter vector

PER:

Protein efficiency ratio

PR:

Protein retention

qRT-PCR:

Quantitative real-time PCR

RT-PCR:

Reverse transcription polymerase chain reaction

sqRT-PCR:

Semiquantitative real-time PCR

T4:

Thyroxine hormone

TAE:

Tris base, acetate, and ethylenediaminetetraacetic acid

TCA:

Tricarboxylic acid cycle

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Acknowledgements

The authors are thankful to the Ministry of Research, Technology and Higher Education, Directorate General of Research and Development, Directorate of Research and Community Service, and the Directorate of Research and Community Service of the University of Padjadjaran for support of research costs through the DIPA BLU (2203/UN6.3.1/PT.00/2022). The author is also grateful to thank the research team for technical support during the research work. Thanks to Mr. Saefudin and Mr. Feri Ferdiana for their help in the rearing of the fish and the collecting of research data.

Funding

This work was supported by a grant from the Directorate of Research and Community Service of Universitas Padjadjaran for the research costs through the Internal Research Grant of Universitas Padjadjaran Number: 2203/UN6.3.1/PT.00/2022.

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Contributions

Ibnu Dwi Buwono (IDB) and Iskandar Iskandar (II) conducted the fish trial, reared fish, collected data, and statistical analysis; Ibnu Dwi Buwono (IDB) and Roffi Grandiosa (RG) analyzed and interpreted data and wrote the manuscript. The design of the study and data analysis and manuscript formatting involved all authors. All authors also critically reviewed the manuscript for intellectual content and gave final approval for the manuscript to be published.

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Correspondence to Ibnu Dwi Buwono.

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Buwono, I.D., Iskandar, I. & Grandiosa, R. CgGH and IGF-1 expression level and growth response of G4 transgenic mutiara strain catfish (Clarias gariepinus) reared at different stocking densities. Aquacult Int 31, 827–846 (2023). https://doi.org/10.1007/s10499-022-01002-6

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  • DOI: https://doi.org/10.1007/s10499-022-01002-6

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