Differential expression of cyclic nucleotide phosphodiesterases 4 in developing rat lung.

Emmanuel Lopez (1, 2) , Pierre-Henri Jarreau (2, 3) , Elodie Zana (1, 2) , Marie-Laure Franco-Montoya (2, 4) , Thomas Schmitz (1, 5) , Danièle Evain-Brion (1, 2) , Jacques R. Bourbon (2, 4) , Christophe Delacourt (2, 4) , Céline Méhats (1)

1 UMR_S 767 - La grossesse normale et pathologique: développement et fonctions du placenta et de l'utérus
2 PremUp Foundation
3 Service de réanimation néonatale Port-Royal
4 IMRB - Institut Mondor de Recherche Biomédicale
5 Maternité Port-Royal [CHU Cochin]

During the perinatal period, lungs undergo changes to adapt to air breathing. The genes involved in these changes are developmentally regulated by various signaling pathways, including the cyclic nucleotide cAMP. As PDE4s are critical enzymes for regulation of cAMP levels, the objective of this study was to investigate PDE4's ontogeny in developing rat lung during the perinatal period. Pulmonary PDE4 activity, PDE4A-D, PDE4B, and PDE4D variant expression levels, PDE4B and PDE4D protein levels, and PDE4D localization in distal lung were determined. PDE4 activity increased towards term, dropped at birth, and increased thereafter to reach a plateau at the end of the second week of life. PDE4B2 and PDE4D long forms demonstrated a pattern of expression that increased markedly at birth. After birth, PDE4D was expressed in alveolar epithelial and mesenchymal cells. The study, therefore, evidenced striking variations in expression patterns among the PDE4 family that differed from changes in global PDE4 activity.

Domaines: Biochimie, Biologie Moléculaire

Emmanuel Lopez, Pierre-Henri Jarreau, Elodie Zana, Marie-Laure Franco-Montoya, Thomas Schmitz, et al.. Differential expression of cyclic nucleotide phosphodiesterases 4 in developing rat lung.. Developmental Dynamics, 2010, 239 (9), pp.2470-8. ⟨10.1002/dvdy.22374⟩. ⟨hal-00526901⟩