Developmental transcription of genes putatively associated with growth in two sturgeon species of different growth rate.
Identifieur interne : 000299 ( Main/Merge ); précédent : 000298; suivant : 000300Developmental transcription of genes putatively associated with growth in two sturgeon species of different growth rate.
Auteurs : Hamed Kolangi Miandare [Iran] ; Hamid Farahmand ; Arash Akbarzadeh ; Sanaz Ramezanpour ; Hiroyuki Kaiya ; Mikiya Miyazato ; Kalle T. Rytkönen ; Mikko NikinmaaSource :
- General and comparative endocrinology [ 1095-6840 ] ; 2013.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : Growth Hormone, Insulin-Like Growth Factor I, RNA, Messenger, Vascular Endothelial Growth Factor A.
- genetics : Fishes, Gene Expression Regulation, Developmental.
- growth & development : Fishes.
- Animals.
Abstract
In the present study, we surveyed developmental changes in the transcription of growth hormone (gh), insulin-like growth factor-I (igf-I), ghrelin (ghrl) and vascular endothelial growth factor (vegf) genes in the largest freshwater fish, European sturgeon (Beluga, Huso huso) and compared the same parameters to that of its phylogenically close moderate-sized species, Persian sturgeon (Acipenser persicus). The transcripts of gh, igf-I, ghrl and vegf were detected at all developmental time-points of Persian sturgeon and Beluga from embryos to juvenile fish. Changes in normalized gh, igf-I, ghrl and vegf transcription by using the geometric average of genes encoding ribosomal protein L6 (RPL6) and elongation factor (EF1A) over the time of development of Persian sturgeon and Beluga were statistically significant (P<0.05). Our results showed that the mRNA expression levels of both igf-I and ghrl were low during early larval development and then increased significantly to the late larval time-points when larvae started exogenous feeding. In both Beluga and Persian sturgeon, after a low mRNA expression during the embryonic stage, the transcript levels of vegf displayed an increasing trend during yolk-sac fry, consistent with organogenesis. The vegf level remained constantly high in the time of exogenous feeding. The highest detection of gh transcripts coincided with the end of the embryonic stage (hatching time) in Persian sturgeon and 3 days-post-hatching (dph) in Beluga. In Persian sturgeon, the gh transcript started to decrease to the rest of the developmental time-points, whereas in Beluga gh transcript had a marked second increase from the time of exogenous feeding (20-dph). This Beluga specific increase in gh transcription may be associated with the marked growth rate and extraordinary size of this fish species.
DOI: 10.1016/j.ygcen.2012.11.013
PubMed: 23229003
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Rytkönen</name></author><author><name sortKey="Nikinmaa, Mikko" sort="Nikinmaa, Mikko" uniqKey="Nikinmaa M" first="Mikko" last="Nikinmaa">Mikko Nikinmaa</name></author></analytic><series><title level="j">General and comparative endocrinology</title><idno type="eISSN">1095-6840</idno><imprint><date when="2013" type="published">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Fishes (genetics)</term><term>Fishes (growth & development)</term><term>Gene Expression Regulation, Developmental (genetics)</term><term>Growth Hormone (genetics)</term><term>Insulin-Like Growth Factor I (genetics)</term><term>RNA, Messenger (genetics)</term><term>Vascular Endothelial Growth Factor A (genetics)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Growth Hormone</term><term>Insulin-Like Growth Factor I</term><term>RNA, Messenger</term><term>Vascular Endothelial Growth Factor A</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Fishes</term><term>Gene Expression Regulation, Developmental</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Fishes</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In the present study, we surveyed developmental changes in the transcription of growth hormone (gh), insulin-like growth factor-I (igf-I), ghrelin (ghrl) and vascular endothelial growth factor (vegf) genes in the largest freshwater fish, European sturgeon (Beluga, Huso huso) and compared the same parameters to that of its phylogenically close moderate-sized species, Persian sturgeon (Acipenser persicus). The transcripts of gh, igf-I, ghrl and vegf were detected at all developmental time-points of Persian sturgeon and Beluga from embryos to juvenile fish. Changes in normalized gh, igf-I, ghrl and vegf transcription by using the geometric average of genes encoding ribosomal protein L6 (RPL6) and elongation factor (EF1A) over the time of development of Persian sturgeon and Beluga were statistically significant (P<0.05). Our results showed that the mRNA expression levels of both igf-I and ghrl were low during early larval development and then increased significantly to the late larval time-points when larvae started exogenous feeding. In both Beluga and Persian sturgeon, after a low mRNA expression during the embryonic stage, the transcript levels of vegf displayed an increasing trend during yolk-sac fry, consistent with organogenesis. The vegf level remained constantly high in the time of exogenous feeding. The highest detection of gh transcripts coincided with the end of the embryonic stage (hatching time) in Persian sturgeon and 3 days-post-hatching (dph) in Beluga. In Persian sturgeon, the gh transcript started to decrease to the rest of the developmental time-points, whereas in Beluga gh transcript had a marked second increase from the time of exogenous feeding (20-dph). This Beluga specific increase in gh transcription may be associated with the marked growth rate and extraordinary size of this fish species.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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