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Effects of cold-exposure and subsequent recovery on cellular proliferation with influence of 20-hydroxyecdysone in a lepidopteran cell line (IAL-PID2) Inra
Lalouette, L.; Renault, D.; Ravaux, J.; Siaussat, D..
In developing insects, the peak level of 20-hydroxyecdysone (20E) initiates a decrease in cyclin expression, which subsequently triggers an arrest of cellular proliferation and the start of differentiation, finally culminating in the moult. We investigated the impact of cold-exposure (4 degrees C) and recovery (26 degrees C) on the cell cycle activity of the Plodia interpunctella Lepidoptera cell line IAL-PID2 and on the expression of B-type cyclin (PcycB), ecdysone receptor (B1-isoform; PiEcR-B1), and Hsc70 (PiHsc70) mRNA. Cold-exposure significantly reduced expression of these mRNAs, while their levels increased to above control values during subsequent recovery at the normal growth temperature. When cold-exposed cells were returned to 26 degrees C, cell...
Tipo: Journal Article Palavras-chave: FROID; DEVELOPPEMENT CELLULAIRE; EFFET DE LA TEMPERATURE; LEPIDOPTERA; RECEPTEUR; EXPRESSION DES GENES; ARN MESSAGER; PROTEINE; HORMONE STEROIDE; PLODIA INTERPUNCTELLA; CARTOGRAPHIE; ELECTROPHORESE; MITE; PYRALIDAE PROLIFERATION; 20-HYDROXYECDYSONE; IAL-PID2 CELLS; STEROID HORMONE RECEPTOR SUPERFAMILY; HEAT SHOCK PROTEINS 70; COLD SHOCK.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010eed35965&uri=/notices/prodinra1/2010/09/
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The 20-hydroxyecdysone-induced signalling pathway in G2/M arrest of Plodia interpunctella imaginal wing cells Inra
Siaussat, D.; Bozzolan, F.; Porcheron, P.; Debernard, S..
The mechanisms involved in the control of cellular proliferation by the steroid hormone 20-hydroxyecdysone (20E) in insects are not known. We dissected the 20E signalling pathway responsible for G2/M arrest of imaginal cells from the IAL-PID2 cells of the Indian meal moth Plodia interpunctella. We first used a 5′–3′ RACE-based strategy to clone a 4479 bp cDNA encoding a putative P. interpunctella HR3 transcription factor named PiHR3. The deduced amino acid sequence of PiHR3 was highly similar to those of HR3 proteins from other lepidopterans, e.g. Manduca sexta and Bombyx mori. Using double-stranded RNA-mediated interference (dsRNAi), we then succeeded in blocking the ability of 20E to induce the expression of PiEcR-B1, PiUSP-2 and PiHR3 genes that encode...
Tipo: Journal Article Palavras-chave: PLODIA INTERPUNCTELLA; EUCARYOTE; ARTHROPODA; HEXAPODA; INSECTE; LEPIDOPTERA; HORMONE STEROIDE; MITE; CLONAGE; ADNC; EXPRESSION DES GENES; TRANSCRIPTION; SEQUENCE NUCLEOTIDIQUE; ACIDE AMINE  RNA INTERFERENCE; STEROID HORMONE RECEPTOR SUPERFAMILY; G2/M ARREST; B CYCLIN; SIGNALLING PATHWAY; IMAGINAL CELLS.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20103c688c9f&uri=/notices/prodinra1/2010/10/
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