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Trypsin gene expression in adults and larvae of tropical gar Atractosteus tropicus
Trypsin gene ( try ) expression levels were quantified in different organs of wild and captive tropical gar ( Atractosteus tropicus ) adults, and changes in expression during initial ontogeny of the species were determined. RNA was extracted from the pancreas, and cDNA was synthesized and later ampl...
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Published in: | Fish physiology and biochemistry 2020-02, Vol.46 (1), p.145-155 |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Trypsin gene (
try
) expression levels were quantified in different organs of wild and captive tropical gar (
Atractosteus tropicus
) adults, and changes in expression during initial ontogeny of the species were determined. RNA was extracted from the pancreas, and cDNA was synthesized and later amplified by endpoint PCR using oligonucleotides designed from different
try
sequences of fish registered in GenBank. Subsequently, specific oligonucleotides were designed from the partial sequences. Gene expression was measured after RNA extraction and synthesis of the cDNA of 11 organs (liver, pancreas, stomach, esophagus, intestine, pyloric caeca, brain, muscle, gills, gonad, and kidney) of captive and wild adults. Likewise, samples of
A. tropicus
larvae were taken on days 0 (embryo), 5, 10, 15, 20, 25, and 30 days after hatching (DAH), the RNA was extracted, and the synthesis of cDNA was carried out to measure real-time gene expression (qPCR). The results showed that the highest relative
try
expression occurred mainly in the esophagus, liver, stomach, and pancreas of both wild and captive adult fish; however, captive organisms had a higher
try
expression level than wild fish. Although
try
expression during initial ontogeny was high in embryos (0 DAH), it did not reach the maximum value until 15 DAH. It was concluded that
try
expression levels in captive adults are due to the high protein content in the balanced feed (trout diet). The highest
try
expression level during larviculture was detected at 15 DAH, which indicates that
A. tropicus
larvae have a mature digestive system and can efficiently hydrolyze proteins from feed at this developmental stage. |
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ISSN: | 0920-1742 1573-5168 |
DOI: | 10.1007/s10695-019-00704-8 |