title: Role of p53 in cAMP/PKA pathway mediated apoptosis.
abstract: Deregulated β-adrenoceptor/cAMP-PKA pathway is implicated in a range of human diseases, such as neuronal loss during aging, cardiomyopathy and septic shock. The molecular mechanism of this process is, however, only poorly understood. We recently had demonstrated that the β-adrenoceptor/cAMP-PKA pathway triggers apoptosis through the transcriptional induction of the pro-apoptotic BH3-only Bcl-2 family member BIM in tissues, such as the thymus and the heart. Induction of BIM is driven by the transcriptional co-activator CBP (CREB Binding Protein) together with the proto-oncogene c-Myc. Association of CBP with c-Myc leads to altered histone acetylation and methylation pattern at the BIM promoter site [Lee et al., Cell Death Difference 20(7):941-952 (2013)]. However since CBP is a co-factor for multiple transcription factors, BH-3 only proteins other than Bim could also contribute to this apoptosis pathway. Here we provide evidence for the involvement of p53-CBP axis in apoptosis through Puma/Noxa induction, in response to β-adrenoceptor activation. Our findings highlight the molecular complexity of pathophysiology associated with a deregulated neuro-endocrine system and for developing novel therapeutic strategies for these diseases.
authors.affiliation: Department of Biochemistry, La Trobe Institute of Molecular Science, La Trobe University, Kingsbury Drive, Bundoora, VIC, 3086, Australia.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Rahimi
authors.forename: Ying Ying
authors.initials: YY
authors.lastname: Lee
authors.forename: Hassen
authors.initials: H
authors.lastname: Abdella
authors.forename: Marcel
authors.initials: M
authors.lastname: Doerflinger
authors.forename: Lahiru
authors.initials: L
authors.lastname: Gangoda
authors.forename: Rahul
authors.initials: R
authors.lastname: Srivastava
authors.forename: Kun
authors.initials: K
authors.lastname: Xiao
authors.forename: Paul G
authors.initials: PG
authors.lastname: Ekert
authors.forename: Hamsa
authors.initials: H
authors.lastname: Puthalakath
mesh_terms: D000818:Animals; D017209:Apoptosis; D051017:Apoptosis Regulatory Proteins / Q000235:genetics / Q000378:metabolism; D050882:CREB-Binding Protein / Q000235:genetics / Q000378:metabolism; D002460:Cell Line; D000242:Cyclic AMP / Q000378:metabolism*; D017868:Cyclic AMP-Dependent Protein Kinases / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D051379:Mice; D000090063:Proto-Oncogene Mas; D011943:Receptors, Adrenergic, beta / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction; D016159:Tumor Suppressor Protein p53 / Q000235:genetics / Q000378:metabolism*
chemical_list: D051017:Apoptosis Regulatory Proteins; C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D011943:Receptors, Adrenergic, beta; D016159:Tumor Suppressor Protein p53; D000242:Cyclic AMP; D050882:CREB-Binding Protein; D017868:Cyclic AMP-Dependent Protein Kinases