Expression of IGF-I and IGF-I receptor in male and female sterlet, Acipenser ruthenus--evidence for an important role in gonad maturation.
Identifieur interne : 000494 ( PubMed/Curation ); précédent : 000493; suivant : 000495Expression of IGF-I and IGF-I receptor in male and female sterlet, Acipenser ruthenus--evidence for an important role in gonad maturation.
Auteurs : S. Wuertz [Allemagne] ; J. Gessner ; F. Kirschbaum ; W. KloasSource :
- Comparative biochemistry and physiology. Part A, Molecular & integrative physiology [ 1095-6433 ] ; 2007.
English descriptors
- KwdEn :
- Animals, Base Sequence, Female, Fishes (genetics), Fishes (physiology), Gene Expression Regulation, Gonads (physiology), Insulin-Like Growth Factor I (genetics), Insulin-Like Growth Factor I (metabolism), Male, Molecular Sequence Data, Oocytes, Plasmids, RNA, Messenger (genetics), RNA, Messenger (metabolism), Receptor, IGF Type 1 (genetics), Receptor, IGF Type 1 (metabolism), Sex Characteristics.
- MESH :
- chemical , genetics : Insulin-Like Growth Factor I, RNA, Messenger, Receptor, IGF Type 1.
- genetics : Fishes.
- chemical , metabolism : Insulin-Like Growth Factor I, RNA, Messenger, Receptor, IGF Type 1.
- physiology : Fishes, Gonads.
- Animals, Base Sequence, Female, Gene Expression Regulation, Male, Molecular Sequence Data, Oocytes, Plasmids, Sex Characteristics.
Abstract
Recent in vitro studies suggest that insulin-like growth factor I (IGF-I) is involved in cell differentiation and steroidogenesis in the gonad and could therefore function as an important trigger in vivo. In this study, sensitive real-time RT-PCR assays were used to determine IGF-I and the IGF-I receptor (IGF-IR) mRNA expression in maturing male and female sterlet (Acipenser ruthenus) over a period of two years: In the first year, females entering vitellogenesis (maturing female group, MFG) revealed an increase of IGF-I expression in the ovaries in contrast to females that did not enter vitellogenesis (non-maturing female group, NMFG). Congruently, IGF-IR expression was elevated in females at the onset of vitellogenesis (MFG), decreased towards the first winter, and increased to similar levels at late vitellogenesis in the second winter just prior to spawning. In the second year, NMFG reached the onset of vitellogenesis. Here, IGF-I and IGF-IR reached similar levels as previously observed in the first year in MFG. In males, low and constant IGF-I expression was observed in the testis, whereas IGF-IR was expressed at a constant high level comparable to those of females entering vitellogenesis. These findings suggest an involvement of IGF-I as an important paracrine regulator of gonad maturation, particularly in the ovary.
DOI: 10.1016/j.cbpa.2006.12.031
PubMed: 17289414
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Kirschbaum</name></author><author><name sortKey="Kloas, W" sort="Kloas, W" uniqKey="Kloas W" first="W" last="Kloas">W. Kloas</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2007">2007</date><idno type="RBID">pubmed:17289414</idno><idno type="pmid">17289414</idno><idno type="doi">10.1016/j.cbpa.2006.12.031</idno><idno type="wicri:Area/PubMed/Corpus">000494</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000494</idno><idno type="wicri:Area/PubMed/Curation">000494</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000494</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Expression of IGF-I and IGF-I receptor in male and female sterlet, Acipenser ruthenus--evidence for an important role in gonad maturation.</title><author><name sortKey="Wuertz, S" sort="Wuertz, S" uniqKey="Wuertz S" first="S" last="Wuertz">S. 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In this study, sensitive real-time RT-PCR assays were used to determine IGF-I and the IGF-I receptor (IGF-IR) mRNA expression in maturing male and female sterlet (Acipenser ruthenus) over a period of two years: In the first year, females entering vitellogenesis (maturing female group, MFG) revealed an increase of IGF-I expression in the ovaries in contrast to females that did not enter vitellogenesis (non-maturing female group, NMFG). Congruently, IGF-IR expression was elevated in females at the onset of vitellogenesis (MFG), decreased towards the first winter, and increased to similar levels at late vitellogenesis in the second winter just prior to spawning. In the second year, NMFG reached the onset of vitellogenesis. Here, IGF-I and IGF-IR reached similar levels as previously observed in the first year in MFG. In males, low and constant IGF-I expression was observed in the testis, whereas IGF-IR was expressed at a constant high level comparable to those of females entering vitellogenesis. These findings suggest an involvement of IGF-I as an important paracrine regulator of gonad maturation, particularly in the ovary.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">17289414</PMID><DateCreated><Year>2007</Year><Month>03</Month><Day>30</Day></DateCreated><DateCompleted><Year>2007</Year><Month>06</Month><Day>06</Day></DateCompleted><DateRevised><Year>2009</Year><Month>11</Month><Day>19</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">1095-6433</ISSN><JournalIssue CitedMedium="Print"><Volume>147</Volume><Issue>1</Issue><PubDate><Year>2007</Year><Month>May</Month></PubDate></JournalIssue><Title>Comparative biochemistry and physiology. Part A, Molecular & integrative physiology</Title><ISOAbbreviation>Comp. Biochem. 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Congruently, IGF-IR expression was elevated in females at the onset of vitellogenesis (MFG), decreased towards the first winter, and increased to similar levels at late vitellogenesis in the second winter just prior to spawning. In the second year, NMFG reached the onset of vitellogenesis. Here, IGF-I and IGF-IR reached similar levels as previously observed in the first year in MFG. In males, low and constant IGF-I expression was observed in the testis, whereas IGF-IR was expressed at a constant high level comparable to those of females entering vitellogenesis. 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