Development Temperature Has Persistent Effects on Muscle Growth Responses in Gilthead Sea Bream
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Autor/a
Garcia de la Serrana, Daniel
Vieira, Vera L.A.
Johnston, Ian A.
Fecha de publicación
2012-12-17ISSN
1932-6203
Resumen
Initially we characterised growth responses to altered nutritional input at the transcriptional and tissue levels in the fast
skeletal muscle of juvenile gilthead sea bream. Fish reared at 21–22uC (range) were fed a commercial diet at 3% body mass
d21 (non-satiation feeding, NSF) for 4 weeks, fasted for 4d (F) and then fed to satiation (SF) for 21d. 13 out of 34 genes
investigated showed consistent patterns of regulation between nutritional states. Fasting was associated with a 20-fold
increase in MAFbx, and a 5-fold increase in Six1 and WASp expression, which returned to NSF levels within 16h of SF.
Refeeding to satiation was associated with a rapid (<24 h) 12 to 17-fold increase in UNC45, Hsp70 and Hsp90a transcripts
coding for molecular chaperones associated with unfolded protein response pathways. The growth factors FGF6 and IGF1
increased 6.0 and 4.5-fold within 16 h and 24 h of refeeding respectively. The average growth in diameter of fast muscle
fibres was checked with fasting and significant fibre hypertrophy was only observed after 13d and 21d SF. To investigate
developmental plasticity in growth responses we used the same experimental protocol with fish reared at either 17.5–
18.5uC (range) (LT) or 21–22uC (range) (HT) to metamorphosis and then transferred to 21–22uC. There were persistent effects
of development temperature on muscle growth patterns with 20% more fibres of lower average diameter in LT than HT
group of similar body size. Altering the nutritional input to the muscle to stimulate growth revealed cryptic changes in the
expression of UNC45 and Hsp90a with higher transcript abundance in the LT than HT groups, whereas there were no
differences in the expression of MAFbx and Six1. It was concluded that myogenesis and gene expression patterns during
growth are not fixed, but can be modified by temperature during the early stages of the life cycle.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Materias (CDU)
639 - Caza. Pesca. Piscicultura
Páginas
11
Publicado por
Public Library of Science
Publicado en
PLoS ONE
Citación
García de la Serrana, Daniel, Vera L. A. Vieira, Karl B. Andrée, María J. Darias, Alicia Estévez, Enric Gisbert, and Ian A. Johnston. 2012. “Development Temperature Has Persistent Effects on Muscle Growth Responses in Gilthead Sea Bream.” PloS One 7 (12): e51884. doi:10.1371/journal.pone.0051884.
Número del acuerdo de la subvención
EC/FP7/222719/EU/Building a biological knowledge-base on fish lifecycles for competitive, sustainable European aquaculture/LIFECYCLE
Program
Aqüicultura
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