Differential Regulation of Phosphorylation of the cAMP Response Element-Binding Protein after Activation of EP2 and EP4 Prostanoid Receptors by Prostaglandin E2

2005 ◽  
Vol 68 (1) ◽  
pp. 251-259 ◽  
Author(s):  
Hiromichi Fujino ◽  
Sambhitab Salvi ◽  
John W. Regan
Keyword(s):  
Prostaglandin E2 ◽  
Binding Protein ◽  
Camp Response Element Binding ◽  
Differential Regulation ◽  
Camp Response Element ◽  
Prostanoid Receptors ◽  
Response Element ◽  
Element Binding Protein

Scutellarin Mitigates Cancer-Induced Bone Pain by Suppressing CaMKII/CREB Pathway in Rat Models

2019 ◽  
Vol 17 (3) ◽  
pp. 249-253
Author(s):  
Liu Chenglong ◽  
Liu Haihua ◽  
Zhang Fei ◽  
Zheng Jie ◽  
Wei Fang
Keyword(s):  
Protein Kinase ◽  
Bone Pain ◽  
Binding Protein ◽  
Camp Response Element Binding ◽  
Camp Response Element ◽  
Dependent Protein Kinase ◽  
Response Element ◽  
Protein Kinase Ii ◽  
Element Binding Protein ◽  
Dependent Protein

Cancer-induced bone pain is a severe and complex pain caused by metastases to bone in cancer patients. The aim of this study was to investigate the analgesic effect of scutellarin on cancer-induced bone pain in rat models by intrathecal injection of Walker 256 carcinoma cells. Mechanical allodynia was determined by paw withdrawal threshold in response to mechanical stimulus, and thermal hyperalgesia was indicated by paw withdrawal latency in response to noxious thermal stimulus. The paw withdrawal threshold and paw withdrawal latencies were significantly decreased after inoculation of tumor cells, whereas administration of scutellarin significantly attenuated tumor cell inoculation-induced mechanical and heat hyperalgesia. Tumor cell inoculation-induced tumor growth was also significantly abrogated by scutellarin. Ca2+/calmodulin-dependent protein kinase II is a multifunctional kinase with up-regulated activity in bone pain models. The activation of Ca2+/calmodulin-dependent protein kinase II triggers phosphorylation of cAMP-response element binding protein. Scutellarin significantly reduced the expression of phosphorylated-Ca2+/calmodulin-dependent protein kinase II and phosphorylated-cAMP-response element binding protein in cancer-induced bone pain rats. Collectively, our study demonstrated that scutellarin attenuated tumor cell inoculation-induced bone pain by down-regulating the expression of phosphorylated-Ca2+/calmodulin-dependent protein kinase II and phosphorylated-cAMP-response element binding protein. The suppressive effect of scutellarin on phosphorylated-Ca2+/calmodulin-dependent protein kinase II/phosphorylated-cAMP-response element binding protein activation may serve as a novel therapeutic strategy for CIBP management.

cAMP Response Element Binding Protein Is Expressed and Phosphorylated in the Human Heart

Circulation ◽  
1995 ◽  
Vol 92 (8) ◽  
pp. 2041-2043 ◽  
Author(s):  
Frank Ulrich Müller ◽  
Peter Bokník ◽  
Andreas Horst ◽  
Jörg Knapp ◽  
Bettina Linck ◽  
...  
Keyword(s):  
Human Heart ◽  
Binding Protein ◽  
Camp Response Element Binding ◽  
Camp Response Element ◽  
Response Element ◽  
Element Binding Protein

scholarly journals p300/cAMP-response-element-binding-protein ('CREB')-binding protein (CBP) modulates co-operation between myocyte enhancer factor 2A (MEF2A) and thyroid hormone receptor-retinoid X receptor

2003 ◽  
Vol 369 (3) ◽  
pp. 477-484 ◽  
Author(s):  
Antonio De LUCA ◽  
Anna SEVERINO ◽  
Paola De PAOLIS ◽  
Giuliano COTTONE ◽  
Luca De LUCA ◽  
...  
Keyword(s):  
Thyroid Hormone ◽  
Binding Protein ◽  
Camp Response Element Binding ◽  
Creb Binding Protein ◽  
Camp Response Element ◽  
Response Element ◽  
Adenovirus E1a ◽  
Element Binding Protein ◽  
Enhancer Factor

Thyroid hormone receptors (TRs) and members of the myocyte enhancer factor 2 (MEF2) family are involved in the regulation of muscle-specific gene expression during myogenesis. Physical interaction between these two factors is required to synergistically activate gene transcription. p300/cAMP-response-element-binding-protein ('CREB')-binding protein (CBP) interacting with transcription factors is able to increase their activity on target gene promoters. We investigated the role of p300 in regulating the TR—MEF2A complex. To this end, we mapped the regions of these proteins involved in physical interactions and we evaluated the expression of a chloramphenicol acetyltransferase (CAT) reporter gene in U2OS cells under control of the α-myosin heavy chain promoter containing the thyroid hormone response element (TRE). Our results suggested a role of p300/CBP in mediating the transactivation effects of the TR—retenoid X receptor (RxR)—MEF2A complex. Our findings showed that the same C-terminal portion of p300 binds the N-terminal domains of both TR and MEF2A, and our in vivo studies demonstrated that TR, MEF2A and p300 form a ternary complex. Moreover, by the use of CAT assays, we demonstrated that adenovirus E1A inhibits activation of transcription by TR—RxR—MEF2A—p300 but not by TR—RxR—MEF2A. Our data suggested that p300 can bind and modulate the activity of TR—RxR—MEF2A at TRE. In addition, it is speculated that p300 might modulate the activity of the TR—RxR—MEF2A complex by recruiting a hypothetical endogenous inhibitor which may act like adenovirus E1A.

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