mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro
Adipocyte lipolysis is dependent on an increase in the intracellular concentration of cAMP. Intracellular phosphodiesterases (PDEs) hydrolyze cAMP and limit stimulation of lipolysis. In the present study, the mRNA expression of PDE4 subtypes and the antilipolytic role of PDE4 in rat adipocytes were...
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| Format: | Article |
| Language: | English |
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Elsevier
2007-05-01
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| Series: | Journal of Lipid Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022227520435564 |
| _version_ | 1818384684990595072 |
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| author | Wang Hong Neilé K. Edens |
| author_facet | Wang Hong Neilé K. Edens |
| author_sort | Wang Hong |
| collection | DOAJ |
| description | Adipocyte lipolysis is dependent on an increase in the intracellular concentration of cAMP. Intracellular phosphodiesterases (PDEs) hydrolyze cAMP and limit stimulation of lipolysis. In the present study, the mRNA expression of PDE4 subtypes and the antilipolytic role of PDE4 in rat adipocytes were investigated. Fragments encoding PDE4A (233 bp), PDE4B (786 bp), PDE4C (539 bp), and PDE4D (262 bp) sequences were amplified by RT-PCR. The mRNA expression of PDE4 subtypes (A, B, C, D) determined by real-time quantitative PCR was 7, 18.7, 18.9, and 7.2% relative to PDE3B. Inhibition of PDE4 by rolipram increased basal lipolysis and reversed in part prostaglandin E2 antilipolysis. The combination of PDE3 and PDE4 inhibitors synergistically reversed both prostaglandin E2 and phenylisopropyl adenosine antilipolysis. Stimulation of adipocytes with prostaglandin E2 increased total PDE activity and PDE3 activity measured by hydrolysis of 3[H]cAMP by the particulate fraction of adipocytes. The present study confirmed that mRNAs for all four PDE4 subtypes were expressed in rat adipocytes, with PDE4B and PDE4C predominant. Moreover, PDE4 not only limits the rate of basal lipolysis but also contributes to prostaglandin E2 antilipolysis in rat adipocytes. |
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| id | doaj.art-8da8afb7bb4e4d838c48e524df57bed3 |
| institution | Directory Open Access Journal |
| issn | 0022-2275 |
| language | English |
| last_indexed | 2024-12-14T03:26:11Z |
| publishDate | 2007-05-01 |
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| spelling | doaj.art-8da8afb7bb4e4d838c48e524df57bed32022-12-21T23:18:53ZengElsevierJournal of Lipid Research0022-22752007-05-0148510991107mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitroWang Hong0Neilé K. Edens1Interdisciplinary PhD Program in Nutrition, The Ohio State University, Columbus, OH 43210Ross Products Division, Abbott Laboratories, Columbus, OH 43215Adipocyte lipolysis is dependent on an increase in the intracellular concentration of cAMP. Intracellular phosphodiesterases (PDEs) hydrolyze cAMP and limit stimulation of lipolysis. In the present study, the mRNA expression of PDE4 subtypes and the antilipolytic role of PDE4 in rat adipocytes were investigated. Fragments encoding PDE4A (233 bp), PDE4B (786 bp), PDE4C (539 bp), and PDE4D (262 bp) sequences were amplified by RT-PCR. The mRNA expression of PDE4 subtypes (A, B, C, D) determined by real-time quantitative PCR was 7, 18.7, 18.9, and 7.2% relative to PDE3B. Inhibition of PDE4 by rolipram increased basal lipolysis and reversed in part prostaglandin E2 antilipolysis. The combination of PDE3 and PDE4 inhibitors synergistically reversed both prostaglandin E2 and phenylisopropyl adenosine antilipolysis. Stimulation of adipocytes with prostaglandin E2 increased total PDE activity and PDE3 activity measured by hydrolysis of 3[H]cAMP by the particulate fraction of adipocytes. The present study confirmed that mRNAs for all four PDE4 subtypes were expressed in rat adipocytes, with PDE4B and PDE4C predominant. Moreover, PDE4 not only limits the rate of basal lipolysis but also contributes to prostaglandin E2 antilipolysis in rat adipocytes.http://www.sciencedirect.com/science/article/pii/S0022227520435564lipolysisphosphodiesteraseprostaglandin E2 |
| spellingShingle | Wang Hong Neilé K. Edens mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro Journal of Lipid Research lipolysis phosphodiesterase prostaglandin E2 |
| title | mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro |
| title_full | mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro |
| title_fullStr | mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro |
| title_full_unstemmed | mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro |
| title_short | mRNA expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro |
| title_sort | mrna expression and antilipolytic role of phosphodiesterase 4 in rat adipocytes in vitro |
| topic | lipolysis phosphodiesterase prostaglandin E2 |
| url | http://www.sciencedirect.com/science/article/pii/S0022227520435564 |
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