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Puertas-Umbert L, Alonso J, Roselló-Díez E, Santamaría-Orleans A, Martínez-González J, Rodríguez C. Rolipram impacts on redox homeostasis and cellular signaling in an experimental model of abdominal aortic aneurysm. Clin Investig Arterioscler 2024; 36:108-117. [PMID: 38061958 DOI: 10.1016/j.arteri.2023.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 05/08/2024]
Abstract
INTRODUCTION Cyclic nucleotide phosphodiesterases (PDEs) of the PDE4 subfamily are responsible for the hydrolysis and subcellular compartmentalization of cAMP, a second messenger that modulates vascular functionality. We had shown that PDE4B is induced in abdominal aortic aneurysms (AAA) and that PDE4 inhibition by rolipram limits experimental aneurysms. In this study we have delved into the mechanisms underlying the beneficial effect of rolipram on AAA. METHODS AAA were induced in ApoE-/- mice by angiotensin II (Ang II) infusion. Aneurysm formation was evaluated by ultrasonography. The expression of enzymes involved in rédox homeostasis was analyzed by real-time RT-PCR and the activation of signaling pathways by Western blot. RESULTS Induction of PDE4B in human AAA has been confirmed in a second cohort of patients. In Ang II-infused ApoE-/- mice, rolipram increased the percentage of animals free of aneurysms without affecting the percentage of aortic ruptures. Quantitative analyses determined that this drug significantly attenuated aortic collagen deposition. Additionally, rolipram reduced the increased Nox2 expression triggered by Ang II, exacerbated Sod1 induction, and normalized Sod3 expression. Likewise, PDE4 inhibition decreased the activation of both ERK1/2 and the canonical Wnt pathway, while AKT activity was not altered. CONCLUSIONS The inhibition of PDE4 activity modulates the expression of enzymes involved in rédox homeostasis and affects cell signaling pathways involved in the development of AAA.
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Affiliation(s)
- Lídia Puertas-Umbert
- Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Barcelona, España; Institut de Recerca Hospital de la Santa Creu i Sant Pau (IRHSCSP), Barcelona, España; CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, Madrid, España
| | - Judith Alonso
- Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Barcelona, España; CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, Madrid, España; Instituto de Investigaciones Biomédicas de Barcelona (IIBB-CSIC), Barcelona, España
| | - Elena Roselló-Díez
- Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Barcelona, España; Departamento de Cirugía Cardíaca, Hospital de la Santa Creu i Sant Pau-Universitat Autònoma de Barcelona (HSCSP-UAB), Barcelona, España
| | - Alicia Santamaría-Orleans
- Laboratorios Ordesa S.L., Scientific Communication Department, Sant Boi del Llobregat, Barcelona, España
| | - José Martínez-González
- Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Barcelona, España; CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, Madrid, España; Instituto de Investigaciones Biomédicas de Barcelona (IIBB-CSIC), Barcelona, España
| | - Cristina Rodríguez
- Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Barcelona, España; Institut de Recerca Hospital de la Santa Creu i Sant Pau (IRHSCSP), Barcelona, España; CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, Madrid, España.
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Hong JM, Gerard-O'Riley RL, Acton D, Alam I, Econs MJ, Bruzzaniti A. The PDE4 Inhibitors Roflumilast and Rolipram Rescue ADO2 Osteoclast Resorption Dysfunction. Calcif Tissue Int 2024; 114:430-443. [PMID: 38483547 DOI: 10.1007/s00223-024-01191-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/29/2024] [Indexed: 03/22/2024]
Abstract
Autosomal Dominant Osteopetrosis type II (ADO2) is a rare bone disease of impaired osteoclastic bone resorption caused by heterozygous missense mutations in the chloride channel 7 (CLCN7). Adenylate cyclase, which catalyzes the formation of cAMP, is critical for lysosomal acidification in osteoclasts. We found reduced cAMP levels in ADO2 osteoclasts compared to wild-type (WT) osteoclasts, leading us to examine whether regulating cAMP would improve ADO2 osteoclast activity. Although forskolin, a known activator of adenylate cyclase and cAMP levels, negatively affected osteoclast number, it led to an overall increase in ADO2 and WT osteoclast resorption activity in vitro. Next, we examined cAMP hydrolysis by the phosphodiesterase 4 (PDE4) proteins in ADO2 versus WT osteoclasts. QPCR analysis revealed higher expression of the three major PDE4 subtypes (4a, 4b, 4d) in ADO2 osteoclasts compared in WT, consistent with reduced cAMP levels in ADO2 osteoclasts. In addition, we found that the PDE4 antagonists, rolipram and roflumilast, stimulated ADO2 and WT osteoclast formation in a dose-dependent manner. Importantly, roflumilast and rolipram displayed a concentration-dependent increase in osteoclast resorption activity which was greater in ADO2 than WT osteoclasts. Moreover, treatment with roflumilast rescued cAMP levels in ADO2 OCLs. The key findings from our studies demonstrate that osteoclasts from ADO2 mice exhibit reduced cAMP levels and PDE4 inhibition rescues cAMP levels and ADO2 osteoclast activity dysfunction in vitro. The mechanism of action of PDE4 inhibitors and their ability to reduce the high bone mass of ADO2 mice in vivo are currently under investigation. Importantly, these studies advance the understanding of the mechanisms underlying the ADO2 osteoclast dysfunction which is critical for the development of therapeutic approaches to treat clinically affected ADO2 patients.
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Affiliation(s)
- Jung Min Hong
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, 1121 West Michigan Street, DS266, Indianapolis, IN, 46202, USA
| | - Rita L Gerard-O'Riley
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Dena Acton
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Imranul Alam
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Michael J Econs
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Angela Bruzzaniti
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, 1121 West Michigan Street, DS266, Indianapolis, IN, 46202, USA.
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Lim I, Masutani T, Hashitani H, Chess‐Williams R, Sellers D. Inhibition of PDE-4 isoenzyme attenuates frequency and overall contractility of agonist-evoked ureteral phasic contractions. Pharmacol Res Perspect 2024; 12:e1175. [PMID: 38339883 PMCID: PMC10858371 DOI: 10.1002/prp2.1175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/20/2023] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
The aim of this study was to investigate the functional role of phosphodiesterase enzymes (PDE) in the isolated porcine ureter. Distal ureteral strips were mounted in organ baths and pre-contracted with 5-HT (100 μM). Upon generation of stable phasic contractions, PDE-4 and PDE-5 inhibitors were added cumulatively to separate tissues. PDE-4 inhibitors, such as rolipram (10 nM and greater) and roflumilast (100 nM and greater), resulted in significant attenuation of ureteral contractile responses, while a higher concentration of piclamilast (1 μM and greater) was required to induce a significant depressant effect. The attenuation effect by rolipram was abolished by SQ22536 (100 μM). PDE-5 inhibitors, such as sildenafil and tadalafil, were not nearly as effective and were only able to suppress the 5-HT-induced contractions at higher concentrations of 1 μM. Rolipram significantly enhanced the depressant effect of forskolin, while sodium nitroprusside-induced attenuation of contractile responses remained unchanged in the presence of tadalafil. In summary, our study demonstrates that PDE-4 inhibitors are effective in attenuating 5-HT-induced contractility in porcine distal ureteral tissues, while PDE-5 inhibitors are less effective. These findings suggest that PDE-4 inhibitors, such as rolipram, may hold promise as potential therapeutic agents for the treatment of ureteral disorders attributable to increased intra-ureteral pressure.
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Affiliation(s)
- Iris Lim
- Centre for Urology, Faculty of Health Sciences & MedicineBond UniversityGold CoastQueenslandAustralia
| | - Taishi Masutani
- Department of Cell PhysiologyNagoya City University Graduate School of Medical SciencesNagoyaJapan
| | - Hikaru Hashitani
- Department of Cell PhysiologyNagoya City University Graduate School of Medical SciencesNagoyaJapan
| | - Russ Chess‐Williams
- Centre for Urology, Faculty of Health Sciences & MedicineBond UniversityGold CoastQueenslandAustralia
| | - Donna Sellers
- Department of Cell PhysiologyNagoya City University Graduate School of Medical SciencesNagoyaJapan
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Mondal D, Bagchi A, Biswas S, Dagar T, Biswas A, Bagchi A, De S. Vesicle-Encapsulated Rolipram (PDE4 Inhibitor) and Its Anticancer Activity. ACS Appl Bio Mater 2024; 7:369-378. [PMID: 38150107 DOI: 10.1021/acsabm.3c00961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Vesicular carriers of drugs are popular for specific targeting and delivery. The most popular vesicles among these are liposomes. However, they suffer from some inherent limitations. In this work, alternative vesicles with enhanced stability, i.e., niosomes and bilosomes have been prepared, characterized, and their delivery efficiency studied. Bilosomes have the additional advantage of being able to withstand the harsh environment of the gastrointestinal tract (GIT). The taurine-derived bile salt (NaTC) was incorporated into the bilosome bilayer. The inspiration behind NaTC insertion is the recent reports on antiaging action and immune function of taurine. Fluorescence probing was used to study the vesicle environment. The entrapment and subsequent release of the important cAMP-specific PDE4 inhibitor/drug Rolipram, which has antibreast cancer properties, was assessed on the breast cancer cell line MCF-7. Rolipram has important therapeutic applications, one of the most significant in recent times being the treatment of Covid-19-triggered pneumonia and cytokine storms. As for cancer chemotherapy, the localization of drug, targeted delivery, and sustained release are extremely important issues, and it seemed worthwhile to explore the potential of the bilosomes and niosomes to entrap and release Rolipram. The important finding is that niosomes perform much better than bilosomes in the hormone-responsive breast cancer mileau MCF-7. Moreover, there was a 4-fold decrease in the IC50 of Rolipram encapsulated in niosomes compared to Rolipram alone. On the other hand, bilosome-encapsulated Rolipram shows higher IC50 value. The results can be further understood by molecular docking studies.
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Affiliation(s)
- Durga Mondal
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Arka Bagchi
- Department of Zoology, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Sima Biswas
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Tanmay Dagar
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Arunima Biswas
- Department of Zoology, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Angshuman Bagchi
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Swati De
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal 741235, India
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Ou M, Cho HY, Fu J, Thein TZ, Wang W, Swenson SD, Minea RO, Stathopoulos A, Schönthal AH, Hofman FM, Tang L, Chen TC. Inhibition of autophagy and induction of glioblastoma cell death by NEO214, a perillyl alcohol-rolipram conjugate. Autophagy 2023; 19:3169-3188. [PMID: 37545052 PMCID: PMC10621246 DOI: 10.1080/15548627.2023.2242696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 07/26/2023] [Indexed: 08/08/2023] Open
Abstract
Glioblastoma (GBM) is the most aggressive primary brain tumor, exhibiting a high rate of recurrence and poor prognosis. Surgery and chemoradiation with temozolomide (TMZ) represent the standard of care, but, in most cases, the tumor develops resistance to further treatment and the patients succumb to disease. Therefore, there is a great need for the development of well-tolerated, effective drugs that specifically target chemoresistant gliomas. NEO214 was generated by covalently conjugating rolipram, a PDE4 (phosphodiesterase 4) inhibitor, to perillyl alcohol, a naturally occurring monoterpene related to limonene. Our previous studies in preclinical models showed that NEO214 harbors anticancer activity, is able to cross the blood-brain barrier (BBB), and is remarkably well tolerated. In the present study, we investigated its mechanism of action and discovered inhibition of macroautophagy/autophagy as a key component of its anticancer effect in glioblastoma cells. We show that NEO214 prevents autophagy-lysosome fusion, thereby blocking autophagic flux and triggering glioma cell death. This process involves activation of MTOR (mechanistic target of rapamycin kinase) activity, which leads to cytoplasmic accumulation of TFEB (transcription factor EB), a critical regulator of genes involved in the autophagy-lysosomal pathway, and consequently reduced expression of autophagy-lysosome genes. When combined with chloroquine and TMZ, the anticancer impact of NEO214 is further potentiated and unfolds against TMZ-resistant cells as well. Taken together, our findings characterize NEO214 as a novel autophagy inhibitor that could become useful for overcoming chemoresistance in glioblastoma.Abbreviations: ATG: autophagy related; BAFA1: bafilomycin A1; BBB: blood brain barrier; CQ: chloroquine; GBM: glioblastoma; LAMP1: lysosomal associated membrane protein 1; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MGMT: O-6-methylguanine-DNA methyltransferase; MTOR: mechanistic target of rapamycin kinase; MTORC: MTOR complex; POH: perillyl alcohol; SQSTM1/p62: sequestosome 1; TFEB: transcription factor EB; TMZ: temozolomide.
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Affiliation(s)
- Mengting Ou
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Hee-Yeon Cho
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Chemistry, Physics, and Engineering, Biola University, La Mirada, CA, USA
| | - Jie Fu
- Department of Neurology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Thu Zan Thein
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Weijun Wang
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Stephen D. Swenson
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Radu O. Minea
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Apostolos Stathopoulos
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Axel H. Schönthal
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Florence M. Hofman
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Liling Tang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Thomas C. Chen
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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Dastgheib M, Falak R, Moghaddam MV, Hassanzadeh G, Safa M, Hosseini A. Rolipram and pentoxifylline combination ameliorates the morphological abnormalities of dorsal root ganglion neurons in experimental diabetic neuropathy by reducing mitochondrial dysfunction and apoptosis. J Biochem Mol Toxicol 2023; 37:e23459. [PMID: 37431890 DOI: 10.1002/jbt.23459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 06/20/2023] [Accepted: 07/04/2023] [Indexed: 07/12/2023]
Abstract
Diabetic neuropathy (DN) is the most prevalent complication of diabetes. Pharmacological treatments for DN are often limited in efficacy, so the development of new agents to alleviate DN is essential. The aim of this study was to evaluate the effects of rolipram, a selective phosphodiesterase-4 inhibitor (PDE-4I), and pentoxifylline, a general PDE inhibitor, using a rat model of DN. In this study, a diabetic rat model was established by i.p. injection of STZ (55 mg/kg). Rats were treated with rolipram (1 mg/kg), pentoxifylline (100 mg/kg), and combination of rolipram (0.5 mg/kg) and pentoxifylline (50 mg/kg), orally for 5 weeks. After treatments, sensory function was assessed by hot plate test. Then rats were anesthetized and dorsal root ganglion (DRG) neurons isolated. Cyclic adenosine monophosphate (cAMP), adenosine triphosphate (ATP, adenosine diphosphate and mitochondrial membrane potential (MMP) levels, Cytochrome c release, Bax, Bcl-2, caspase-3 proteins expression in DRG neurons were assessed by biochemical and ELISA methods, and western blot analysis. DRG neurons were histologically examined using hematoxylin and eosin (H&E) staining method. Rolipram and/or pentoxifylline significantly attenuated sensory dysfunction by modulating nociceptive threshold. Rolipram and/or pentoxifylline treatment dramatically increased the cAMP level, prevented mitochondrial dysfunction, apoptosis and degeneration of DRG neurons, which appears to be mediated by inducing ATP and MMP, improving cytochrome c release, as well as regulating the expression of Bax, Bcl-2, and caspase-3 proteins, and improving morphological abnormalities of DRG neurons. We found maximum effectiveness with rolipram and pentoxifylline combination on mentioned factors. These findings encourage the use of rolipram and pentoxifylline combination as a novel experimental evidence for further clinical investigations in the treatment of DN.
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Affiliation(s)
- Mona Dastgheib
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Falak
- Department of Immunology, Iran University of Medical Sciences, Tehran, Iran
| | | | | | - Majid Safa
- Department of Hematology and Blood Banking, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Asieh Hosseini
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
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Cong YF, Liu FW, Xu L, Song SS, Shen XR, Liu D, Hou XQ, Zhang HT. Rolipram Ameliorates Memory Deficits and Depression-Like Behavior in APP/PS1/tau Triple Transgenic Mice: Involvement of Neuroinflammation and Apoptosis via cAMP Signaling. Int J Neuropsychopharmacol 2023; 26:585-598. [PMID: 37490542 PMCID: PMC10519811 DOI: 10.1093/ijnp/pyad042] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 07/24/2023] [Indexed: 07/27/2023] Open
Abstract
BACKGROUND Alzheimer disease (AD) and depression often cooccur, and inhibition of phosphodiesterase-4 (PDE4) has been shown to ameliorate neurodegenerative illness. Therefore, we explored whether PDE4 inhibitor rolipram might also improve the symptoms of comorbid AD and depression. METHODS APP/PS1/tau mice (10 months old) were treated with or without daily i.p. injections of rolipram for 10 days. The animal groups were compared in behavioral tests related to learning, memory, anxiety, and depression. Neurochemical measures were conducted to explore the underlying mechanism of rolipram. RESULTS Rolipram attenuated cognitive decline as well as anxiety- and depression-like behaviors. These benefits were attributed at least partly to the downregulation of amyloid-β, Amyloid precursor protein (APP), and Presenilin 1 (PS1); lower tau phosphorylation; greater neuronal survival; and normalized glial cell function following rolipram treatment. In addition, rolipram upregulated B-cell lymphoma-2 (Bcl-2) and downregulated Bcl-2-associated X protein (Bax) to reduce apoptosis; it also downregulated interleukin-1β, interleukin-6, and tumor necrosis factor-α to restrain neuroinflammation. Furthermore, rolipram increased cAMP, PKA, 26S proteasome, EPAC2, and phosphorylation of ERK1/2 while decreasing EPAC1. CONCLUSIONS Rolipram may mitigate cognitive deficits and depression-like behavior by reducing amyloid-β pathology, tau phosphorylation, neuroinflammation, and apoptosis. These effects may be mediated by stimulating cAMP/PKA/26S and cAMP/exchange protein directly activated by cAMP (EPAC)/ERK signaling pathways. This study suggests that PDE4 inhibitor rolipram can be an effective target for treatment of comorbid AD and depression.
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Affiliation(s)
- Yi-Fan Cong
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, Shandong, P.R. China
| | - Fu-Wang Liu
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, Shandong, P.R. China
| | - Li Xu
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, Shandong, P.R. China
| | - Shuang-Shuang Song
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, Shandong, P.R. China
| | - Xu-Ri Shen
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, Shandong, P.R. China
| | - Dong Liu
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, Shandong, P.R. China
| | - Xue-Qin Hou
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, Shandong, P.R. China
| | - Han-Ting Zhang
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, Shandong, P.R. China
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Gao J, Khang MK, Liao Z, Webb K, Detloff MR, Lee JS. Rolipram-loaded PgP nanoparticle reduces secondary injury and enhances motor function recovery in a rat moderate contusion SCI model. Nanomedicine 2023; 53:102702. [PMID: 37574117 DOI: 10.1016/j.nano.2023.102702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 07/30/2023] [Accepted: 08/02/2023] [Indexed: 08/15/2023]
Abstract
Spinal cord injury (SCI) results in immediate axonal damage and cell death, as well as a prolonged secondary injury consist of a cascade of pathophysiological processes. One important aspect of secondary injury is activation of phosphodiesterase 4 (PDE4) that leads to reduce cAMP levels in the injured spinal cord. We have developed an amphiphilic copolymer, poly (lactide-co-glycolide)-graft-polyethylenimine (PgP) that can deliver Rolipram, the PDE4 inhibitor. The objective of this work was to investigate the effect of rolipram loaded PgP (Rm-PgP) on secondary injury and motor functional recovery in a rat moderate contusion SCI model. We observed that Rm-PgP can increase cAMP level at the lesion site, and reduce secondary injury such as the inflammatory response by macrophages/microglia, astrogliosis by activated astrocytes and apoptosis as well as improve neuronal survival at 4 weeks post-injury (WPI). We also observed that Rm-PgP can improve motor functional recovery after SCI over 4 WPI.
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Affiliation(s)
- Jun Gao
- Drug Design Delivery and Development (4D) Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - Min Kyung Khang
- Drug Design Delivery and Development (4D) Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - Zhen Liao
- Drug Design Delivery and Development (4D) Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA.
| | - Ken Webb
- MicroEnvironmental Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA.
| | - Megan Ryan Detloff
- Department of Neurobiology & Anatomy, Marion Murray Spinal Cord Research Center, College of Medicine, Drexel University, Philadelphia, PA 19129, USA.
| | - Jeoung Soo Lee
- Drug Design Delivery and Development (4D) Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA.
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Hake A, Begrow F, Spiegler V, Symma N, Hensel A, Düfer M. Effects of Extracts and Flavonoids from Drosera rotundifolia L. on Ciliary Beat Frequency and Murine Airway Smooth Muscle. Molecules 2022; 27:molecules27196622. [PMID: 36235159 PMCID: PMC9572773 DOI: 10.3390/molecules27196622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/21/2022] [Accepted: 09/27/2022] [Indexed: 11/05/2022]
Abstract
Extracts from Drosera rotundifolia are traditionally used to treat cough symptoms during a common cold. The present study aimed to investigate the impact of extracts from D. rotundifolia and active compounds on the respiratory tract. Tracheal slices of C57BL/6N mice were used ex vivo to examine effects on airway smooth muscle (ASM) and ciliary beat frequency (CBF). Phosphodiesterase (PDE) inhibition assays were carried out to test whether PDE1 or PDE4 are targeted by the active compounds. An ethanol–water extract, as well as an aqueous fraction of this extract, exerted antispasmodic properties against acetylcholine-induced contractions. In addition, contractions induced by 60 mM K+ were abrogated by the aqueous fraction. Effects on ASM could be attributed to the flavonoids quercetin, 2″-O-galloylhyperoside and hyperoside. Moreover, the Drosera extract and the aqueous fraction increased the CBF of murine tracheal slices. Quercetin and 2″-O-galloylhyperoside were identified as active compounds involved in the elevation of CBF. Both compounds inhibited PDE1A and PDE4D. The elevation of CBF was mimicked by the subtype-selective PDE inhibitor rolipram (PDE4) and by 8-methoxymethyl-IBMX. In summary, our study shows, for the first time, that a Drosera extract and its flavonoid compounds increase the CBF of murine airways while antispasmodic effects were transferred to ASM.
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Affiliation(s)
- Alexander Hake
- Institute of Pharmaceutical and Medicinal Chemistry—Pharmacology, University of Münster, 48149 Münster, Germany
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, 48149 Münster, Germany
| | - Frank Begrow
- Institute of Pharmaceutical and Medicinal Chemistry—Pharmacology, University of Münster, 48149 Münster, Germany
| | - Verena Spiegler
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, 48149 Münster, Germany
| | - Nico Symma
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, 48149 Münster, Germany
| | - Andreas Hensel
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, 48149 Münster, Germany
| | - Martina Düfer
- Institute of Pharmaceutical and Medicinal Chemistry—Pharmacology, University of Münster, 48149 Münster, Germany
- Correspondence:
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Dastgheib M, Shetab-Boushehri SV, Baeeri M, Gholami M, Karimi MY, Hosseini A. Rolipram and pentoxifylline combination ameliorates experimental diabetic neuropathy through inhibition of oxidative stress and inflammatory pathways in the dorsal root ganglion neurons. Metab Brain Dis 2022; 37:2615-2627. [PMID: 35922732 DOI: 10.1007/s11011-022-01060-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 07/30/2022] [Indexed: 10/16/2022]
Abstract
Diabetic neuropathy (DN) is the most challenging microvascular complication of diabetes and there is no suitable treatment for it, so the development of new agents to relieve DN is urgently needed. Since oxidative stress and inflammation play an essential role in the development of DN, clearance of these factors are good strategies for the treatment of this disease. According to key role of cyclic adenosine monophosphate (cAMP) in the regulation of oxidative stress and inflammatory pathways, it seems that phosphodiesterase inhibitors (PDEIs) can be as novel drug targets for improving DN through enhancement of cAMP level. The aim of this study was to evaluate the effects of rolipram, a selective PDE4 inhibitor, and pentoxifylline, a general PDE inhibitor on experimental model of DN and also to determine the possible mechanisms involved in the effectiveness of these agents. We investigated the effects of rolipram (1 mg/kg) and pentoxifylline (100 mg/kg) and also combination of rolipram (0.5 mg/kg) and pentoxifylline (50 mg/kg), orally for five weeks in rats that became diabetic by STZ (55 mg/kg, i.p.). After treatments, motor function was evaluated by open-field test, then rats were anesthetized and dorsal root ganglion (DRG) neurons isolated. Next, oxidative stress biomarkers and inflammatory factors were assessed by biochemical and ELISA methods, and RT-PCR analysis in DRG neurons. Rolipram and/or pentoxifylline treatment significantly attenuated DN - induced motor function deficiency by modulating distance moved and velocity. Rolipram and/or pentoxifylline treatment dramatically increased the cAMP level, as well as suppressed DN - induced oxidative stress which was associated with decrease in LPO and ROS and increase in TAC, total thiol, CAT and SOD in DRG neurons. On the other hand, the level of inflammatory factors (TNF-α, NF-kB and COX2) significantly decreased following rolipram and/or pentoxifylline administration. The maximum effectiveness was with rolipram and/or pentoxifylline combination on mentioned factors. These findings provide novel experimental evidence for further clinical investigations on rolipram and pentoxifylline combination for the treatment of DN.
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Affiliation(s)
- Mona Dastgheib
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | | | - Maryam Baeeri
- Department of Toxicology and Pharmacology, School of Pharmacy, and Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Gholami
- Department of Toxicology and Pharmacology, School of Pharmacy, and Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | | | - Asieh Hosseini
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran.
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11
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Liu X, Zhu H, Gao H, Tian X, Tan B, Su R. G s signaling pathway distinguishes hallucinogenic and nonhallucinogenic 5-HT 2AR agonists induced head twitch response in mice. Biochem Biophys Res Commun 2022; 598:20-25. [PMID: 35149433 DOI: 10.1016/j.bbrc.2022.01.113] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 01/28/2022] [Indexed: 11/21/2022]
Abstract
5- HT2A receptor is a member of the family A G-protein-coupled receptor. It is involved in many psychiatric disorders, such as depression, addiction and Parkinson's disease. 5-HT2AR targeted drugs play an important role in regulating cognition, memory, emotion and other physiological function by coupling G proteins, and their most notable function is stimulating the serotonergic hallucination. However, not all 5-HT2AR agonists exhibit hallucinogenic activity, such as lisuride. Molecular mechanisms of these different effects are not well illustrated. This study suggested that 5-HT2AR coupled both Gs and Gq protein under hallucinogenic agonists DOM and 25CN-NBOH stimulation, but nonhallucinogenic agonist lisuride and TBG only activates Gq signaling. Moreover, in head twitch response (HTR) model, we found that cAMP analogs 8-Bromo-cAMP and PDE4 inhibitor Rolipram could increase HTR, while Gs protein inhibitor Melittin could reduce HTR. Collectively, these results revealed that Gs signaling is a key signaling pathway that may distinguish hallucinogenic agonists and nonhallucinogenic agonists.
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Affiliation(s)
- Xiaoqian Liu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Huili Zhu
- School of Pharmacy, Yantai University, Yantai, 264005, China
| | - Huan Gao
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China; School of Pharmacy, Yantai University, Yantai, 264005, China
| | - Xiangyun Tian
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Bo Tan
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Ruibin Su
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China.
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12
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Yu Y, He C, Tan S, Huang M, Guo Y, Li M, Zhang Q. MicroRNA-137-3p Improves Nonalcoholic Fatty Liver Disease through Activating AMPK α. Anal Cell Pathol (Amst) 2021; 2021:4853355. [PMID: 35004133 PMCID: PMC8731301 DOI: 10.1155/2021/4853355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 12/02/2021] [Indexed: 12/13/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is one of the most common chronic liver diseases worldwide and can develop to nonalcoholic steatohepatitis and later hepatic cirrhosis with a high prevalence to hepatocellular carcinoma. Oxidative stress and chronic hepatic inflammation are implicated in the pathogenesis of NAFLD. MicroRNA-137-3p (miR-137-3p) are associated with oxidative stress and inflammation; however, its role and mechanism in NAFLD remain unclear. Mice were fed with a high-fat diet (HFD) for 24 weeks to establish the NAFLD model. To overexpress or suppress hepatic miR-137-3p expression, mice were intraperitoneally injected with the agomir, antagomir, or respective controls of miR-137-3p at a dose of 100 mg/kg weekly for 6 consecutive weeks before the mice were sacrificed. To validate the involvement of AMP-activated protein kinase alpha (AMPKα) or cAMP-specific phosphodiesterase 4D (PDE4D), HFD mice were intraperitoneally injected with 20 mg/kg compound C or 0.5 mg/kg rolipram every other day for 8 consecutive weeks before the mice were sacrificed. Hepatic miR-137-3p expression was significantly decreased in mice upon HFD stimulation. miR-137-3p agomir alleviated, while miR-137-3p antagomir facilitated HFD-induced oxidative stress, inflammation, and hepatic dysfunction in mice. Mechanistically, we revealed that miR-137-3p is directly bound to the 3'-untranslated region of PDE4D and subsequently increased hepatic cAMP level and protein kinase A activity, thereby activating the downstream AMPKα pathway. In summary, miR-137-3p improves NAFLD through activating AMPKα and it is a promising therapeutic candidate to treat NAFLD.
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Affiliation(s)
- Yuanjie Yu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
- Hubei Key Laboratory of Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
| | - Chunping He
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
- Hubei Key Laboratory of Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
| | - Shiyun Tan
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
- Hubei Key Laboratory of Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
| | - Mengjun Huang
- Department of Nutrition, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430014, Hubei, China
| | - Yitian Guo
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
- Hubei Key Laboratory of Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
| | - Ming Li
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
- Hubei Key Laboratory of Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
| | - Qian Zhang
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
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Kim NS, Wen Z, Liu J, Zhou Y, Guo Z, Xu C, Lin YT, Yoon KJ, Park J, Cho M, Kim M, Wang X, Yu H, Sakamuru S, Christian KM, Hsu KS, Xia M, Li W, Ross CA, Margolis RL, Lu XY, Song H, Ming GL. Pharmacological rescue in patient iPSC and mouse models with a rare DISC1 mutation. Nat Commun 2021; 12:1398. [PMID: 33658519 PMCID: PMC7930023 DOI: 10.1038/s41467-021-21713-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 02/10/2021] [Indexed: 01/31/2023] Open
Abstract
We previously identified a causal link between a rare patient mutation in DISC1 (disrupted-in-schizophrenia 1) and synaptic deficits in cortical neurons differentiated from isogenic patient-derived induced pluripotent stem cells (iPSCs). Here we find that transcripts related to phosphodiesterase 4 (PDE4) signaling are significantly elevated in human cortical neurons differentiated from iPSCs with the DISC1 mutation and that inhibition of PDE4 or activation of the cAMP signaling pathway functionally rescues synaptic deficits. We further generated a knock-in mouse line harboring the same patient mutation in the Disc1 gene. Heterozygous Disc1 mutant mice exhibit elevated levels of PDE4s and synaptic abnormalities in the brain, and social and cognitive behavioral deficits. Pharmacological inhibition of the PDE4 signaling pathway rescues these synaptic, social and cognitive behavioral abnormalities. Our study shows that patient-derived isogenic iPSC and humanized mouse disease models are integral and complementary for translational studies with a better understanding of underlying molecular mechanisms.
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Affiliation(s)
- Nam-Shik Kim
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Zhexing Wen
- Departments of Psychiatry and Behavioral Sciences, Cell Biology, and Neurology, Emory University School of Medicine, Atlanta, GA, USA
| | - Jing Liu
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Ying Zhou
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Bio-X Institutes, Key Laboratory for the Genetics of Development and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China
| | - Ziyuan Guo
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Chongchong Xu
- Departments of Psychiatry and Behavioral Sciences, Cell Biology, and Neurology, Emory University School of Medicine, Atlanta, GA, USA
| | - Yu-Ting Lin
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ki-Jun Yoon
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Junhyun Park
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Michelle Cho
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Minji Kim
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Xinyuan Wang
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Huimei Yu
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Srilatha Sakamuru
- National Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Bethesda, MD, USA
| | - Kimberly M Christian
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Kuei-Sen Hsu
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Menghang Xia
- National Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Bethesda, MD, USA
| | - Weidong Li
- Bio-X Institutes, Key Laboratory for the Genetics of Development and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China
| | - Christopher A Ross
- Division of Neurobiology, Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Solomon H Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pharmacology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Russell L Margolis
- Division of Neurobiology, Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Xin-Yun Lu
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.
- Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, USA.
| | - Hongjun Song
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Department of Cell and Developmental Biology, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- The Epigenetics Institute, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA.
| | - Guo-Li Ming
- Department of Neuroscience and Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Department of Cell and Developmental Biology, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Department of Psychiatry, Perelman School for Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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14
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Ji J, Liu Z, Hong X, Liu Z, Gao J, Liu J. Protective effects of rolipram on endotoxic cardiac dysfunction via inhibition of the inflammatory response in cardiac fibroblasts. BMC Cardiovasc Disord 2020; 20:242. [PMID: 32448150 PMCID: PMC7247226 DOI: 10.1186/s12872-020-01529-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 05/14/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Cardiac fibroblasts, regarded as the immunomodulatory hub of the heart, have been thought to play an important role during sepsis-induced cardiomyopathy (SIC). However, the detailed molecular mechanism and targeted therapies for SIC are still lacking. Therefore, we sought to investigate the likely protective effects of rolipram, an anti-inflammatory drug, on lipopolysaccharide (LPS)-stimulated inflammatory responses in cardiac fibroblasts and on cardiac dysfunction in endotoxic mice. METHOD Cardiac fibroblasts were isolated and stimulated with 1 μg/ml LPS for 6 h, and 10 μmol/l rolipram was administered for 1 h before LPS stimulation. mRNA levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) in fibroblasts and their protein concentrations in supernatant were measured with real-time PCR (rt-PCR) and enzyme-linked immunosorbent assay, respectively. The expression of dual specificity phosphatase 1 (DUSP1), an endogenous negative regulator that inactivates MAPK-mediated inflammatory pathways, was also measured by rt-PCR and western blotting. DUSP1-targeted small interfering RNA (siRNA) was used to examine the specific role of DUSP1. To evaluate the role of rolipram in vivo, an endotoxic mouse model was established by intraperitoneal injection of 15 mg/kg LPS, and 10 mg/kg rolipram was intraperitoneally injected 1 h before LPS injection. mRNA and protein levels of inflammatory cytokines and DUSP1 in heart, inflammatory cell infiltration and cardiac function were all examined at 6 h after LPS injection. RESULTS The results showed that LPS could increase the expression and secretion of inflammatory cytokines and decrease the transcription and expression of DUSP1 in cardiac fibroblasts. However, rolipram pretreatment significantly reversed the LPS-induced downregulation of DUSP1 and inhibited LPS-induced upregulation and secretion of TNF-α and IL-6 but not IL-1β. Moreover, DUSP1-targeted siRNA experiments indicated that the protective effect of rolipram on inflammatory response was specific dependent on DUSP1 expression. Moreover, rolipram could further reduce inflammatory cell infiltration scores as shown by pathological analysis and increase the ejection fraction (EF) detected with echocardiography in the hearts of endotoxic mice. CONCLUSIONS Rolipram could improve endotoxin-induced cardiac dysfunction by upregulating DUSP1 expression to inhibit the inflammatory response in cardiac fibroblasts, which may be a potential treatment for SIC.
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Affiliation(s)
- Jingjing Ji
- Guangdong Provincial Key Laboratory of Proteomics; School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
- Department of Critical Care Medicine, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Zhifeng Liu
- Guangdong Provincial Key Laboratory of Proteomics; School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.
- Department of Critical Care Medicine, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China.
- Key Laboratory of Hot Zone Trauma Care and Tissue Repair of PLA, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China.
- Guangdong Provincial Key Laboratory of Molecular Oncologic Pathology, Southern Medical University, Guangzhou, 510515, China.
| | - Xinxin Hong
- Department of Critical Care Medicine, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
- Graduate School, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Zheying Liu
- Guangdong Provincial Key Laboratory of Proteomics; School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
- Department of Critical Care Medicine, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Jinghua Gao
- Guangdong Provincial Key Laboratory of Proteomics; School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
- Department of Critical Care Medicine, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Jinghua Liu
- Guangdong Provincial Key Laboratory of Proteomics; School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.
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15
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Ruzza C, Ferrari F, Guerrini R, Marzola E, Preti D, Reinscheid RK, Calo G. Pharmacological profile of the neuropeptide S receptor: Dynamic mass redistribution studies. Pharmacol Res Perspect 2018; 6:e00445. [PMID: 30534379 PMCID: PMC6277375 DOI: 10.1002/prp2.445] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 10/26/2018] [Accepted: 10/29/2018] [Indexed: 12/19/2022] Open
Abstract
Neuropeptide S (NPS) is the endogenous ligand of the neuropeptide S receptor (NPSR). NPS modulates several biological functions including anxiety, wakefulness, pain, and drug abuse. The aim of this study was the investigation of the pharmacological profile of NPSR using the dynamic mass redistribution (DMR) assay. DMR is a label-free assay that offers a holistic view of cellular responses after receptor activation. HEK293 cells stably transfected with the murine NPSR (HEK293mNPSR) have been used. To investigate the nature of the NPS-evoked DMR signaling, FR900359 (Gq inhibitor), pertussis toxin (Gi inhibitor), and rolipram (phosphodiesterase inhibitor) were used. To determine the pharmacology of NPSR, several selective ligands (agonists, partial agonists, antagonists) have been tested. NPS, through selective NPSR activation, evoked a robust DMR signal with potency in the nanomolar range. This signal was predominantly, but not completely, blocked by FR900359, suggesting the involvement of the Gq-dependent signaling cascade. NPSR ligands (agonists and antagonists) displayed potency values in DMR experiments similar, but not identical, to those reported in the literature. Furthermore, partial agonists produced a higher efficacy in DMR than in calcium experiments. DMR can be successfully used to study the pharmacology and signaling properties of novel NPSR ligands. This innovative approach will likely increase the translational value of in vitro pharmacological studies.
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Affiliation(s)
- Chiara Ruzza
- Department of Medical SciencesSection of PharmacologyNational Institute of NeuroscienceUniversity of FerraraFerraraItaly
| | - Federica Ferrari
- Department of Medical SciencesSection of PharmacologyNational Institute of NeuroscienceUniversity of FerraraFerraraItaly
| | - Remo Guerrini
- Department of Chemical and Pharmaceutical Sciences and LTTAUniversity of FerraraFerraraItaly
| | - Erika Marzola
- Department of Chemical and Pharmaceutical Sciences and LTTAUniversity of FerraraFerraraItaly
| | - Delia Preti
- Department of Chemical and Pharmaceutical Sciences and LTTAUniversity of FerraraFerraraItaly
| | - Rainer K. Reinscheid
- Institute of Pharmacology and ToxicologyJena University HospitalFriedrich Schiller University JenaJenaGermany
- Institute of Physiology IUniversity Hospital MünsterUniversity of MünsterMünsterGermany
| | - Girolamo Calo
- Department of Medical SciencesSection of PharmacologyNational Institute of NeuroscienceUniversity of FerraraFerraraItaly
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Pang Y, Thomas P. Role of natriuretic peptide receptor 2-mediated signaling in meiotic arrest of zebrafish oocytes and its estrogen regulation through G protein-coupled estrogen receptor (Gper). Gen Comp Endocrinol 2018; 265:180-187. [PMID: 29574150 DOI: 10.1016/j.ygcen.2018.03.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/07/2018] [Accepted: 03/20/2018] [Indexed: 11/30/2022]
Abstract
Natriuretic peptide type C (NPPC) and its receptor, natriuretic peptide receptor 2 (NPR2), have essential roles in maintaining meiotic arrest of oocytes in several mammalian species. However, it is not known if a similar mechanism exists in non-mammalian vertebrates. Using zebrafish as a model, we show that Nppc is expressed in ovarian follicle cells, whereas Npr2 is mainly detected in oocytes. Treatment of intact and defolliculated oocytes with 100 nM NPPC for 6 h caused a large increase in cGMP concentrations, and a significant decrease in oocyte maturation (OM), an effect that was mimicked by treatment with 8-Br-cGMP. Treatment with E2 and G-1, the specific GPER agonist, also increased cGMP levels. Cyclic AMP levels were also increased by treatments with 8-Br-cGMP, E2 and G1. The estrogen upregulation of cAMP levels was blocked by co-treatment with AG1478, an inhibitor of EGFR activation. Gene expression of npr2, but not nppc, was significantly upregulated in intact oocytes by 6 h treatments with 20 nM E2 and G-1. Both cilostamide, a phosphodiesterase 3 (PDE3) inhibitor, and rolipram, a PDE4 inhibitor, significantly decreased OM of intact and defolliculated oocytes, and enhanced the inhibitory effects of E2 and G-1 on OM. These findings indicate the presence of a Nppc/Npr2/cGMP pathway maintaining meiotic arrest in zebrafish oocytes that is upregulated by estrogen activation of Gper. Collectively, the results suggest that Nppc through Npr2 cooperates with E2 through Gper in upregulation of cGMP levels to inhibit phosphodiesterase activity resulting in maintenance of oocyte meiotic arrest in zebrafish.
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Affiliation(s)
- Yefei Pang
- Marine Science Institute, University of Texas at Austin, 750 Channel View Drive, Port Aransas, TX 78373, USA.
| | - Peter Thomas
- Marine Science Institute, University of Texas at Austin, 750 Channel View Drive, Port Aransas, TX 78373, USA.
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Tsai CC, Tey SL, Chang LC, Su YT, Lin KJ, Huang SC. Estradiol mediates relaxation of porcine lower esophageal sphincter. Steroids 2018; 136:56-62. [PMID: 29733860 DOI: 10.1016/j.steroids.2018.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 04/16/2018] [Accepted: 05/02/2018] [Indexed: 11/29/2022]
Abstract
Most pregnant women have symptoms of gastroesophageal reflux disease (GERD) during pregnancy. Postmenopausal hormone replacement therapy is associated with GERD. The effects of estradiol on lower esophageal sphincter (LES) motility and GERD are not clearly known. The purpose of this study is to investigate the effects of estradiol on the motility of the porcine LES. Relaxations of clasp and sling strips of porcine LES caused by estradiol were measured using isometric transducers. We investigated the mechanism of estradiol-induced relaxation of the porcine LES using tetraethylammonium, apamine, iberiotoxin, glibenclamide, KT5720, KT5823, NG-nitro-l-arginine, tetrodotoxin, and ω-conotoxin GVIA. Reverse transcription polymerase chain reaction (PCR) analysis and immunohistochemistry (IHC) were performed to determine the existence of the G protein-coupled estrogen receptor (GPER) in the porcine LES. In endothelin-1-precontracted porcine LES strips, estradiol caused marked relaxations in a concentration-dependent manner. The mechanism of estradiol-induced relaxation on the porcine LES was associated with the potassium channel. Reverse transcription PCR analysis and IHC revealed that GPER was expressed in the sling and clasp fibers of the porcine LES. This finding suggests that GPER mediates the relaxation of the porcine LES. Estradiol may play a role in LES motility.
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Affiliation(s)
- Ching-Chung Tsai
- Department of Pediatrics, E-Da Hospital, I-Shou University, No.1 Yi-Da Road, Yan-Chao, Kaohsiung City, Taiwan, ROC; School of Chinese Medicine for Post Baccalaureate, I-Shou University, No.8, Yi-Da Road, Yan-Chao, Kaohsiung City, Taiwan, ROC.
| | - Shu-Leei Tey
- Department of Pediatrics, E-Da Hospital, I-Shou University, No.1 Yi-Da Road, Yan-Chao, Kaohsiung City, Taiwan, ROC.
| | - Li-Ching Chang
- School of Medicine for International Students, I-Shou University, No.8 Yi-Da Road, Yan-Chao, Kaohsiung City, Taiwan, ROC.
| | - Yu-Tsun Su
- Department of Pediatrics, E-Da Hospital, I-Shou University, No.1 Yi-Da Road, Yan-Chao, Kaohsiung City, Taiwan, ROC; School of Medicine for International Students, I-Shou University, No.8 Yi-Da Road, Yan-Chao, Kaohsiung City, Taiwan, ROC.
| | - Kai-Jen Lin
- Department of Pathology, E-Da Hospital, I-Shou University, No.1 Yi-Da Road, Yan-Chao, Kaohsiung City, Taiwan, ROC.
| | - Shih-Che Huang
- Department of Internal Medicine, Shosanbetsu Village Clinic, No.122-8, Shosanbetsu, Shosanbetsu Village, Tomamae District, Hokkaido 078-4421, Japan.
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18
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Abstract
Inhibitors of phosphodiesterases (PDEs) have been widely studied as therapeutics for the treatment of human diseases, but improvement of inhibitor selectivity is still desirable for the enhancement of inhibitor potency. Here, we report identification of a water-containing subpocket as a PDE4-specific pocket for inhibitor binding. We designed against the pocket and synthesized two enantiomers of PDE4 inhibitor Zl-n-91. The ( S)-Zl-n-91 enantiomer showed IC50 values of 12 and 20 nM for the catalytic domains of PDE4D2 and PDE4B2B, respectively, selectivity several thousand-fold greater than those of other PDE families, and potent neuroprotection activities. Crystal structures of the PDE4D2 catalytic domain in complex with each Zl-n-91 enantiomer revealed that ( S)-Zl-n-91 but not ( R)-Zl-n-91 formed a hydrogen bond with the bound water in the pocket, thus explaining its higher affinity. The structural superposition between the PDE families revealed that this water-containing subpocket is unique to PDE4 and thus valuable for the design of PDE4 selective inhibitors.
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Affiliation(s)
- Xiaoqing Feng
- School of Pharmaceutical Engineering and life Sciences, Changzhou University, Changzhou, Jiangsu, 213164, PR China
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC 27599-7260, USA
| | - Huanchen Wang
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC 27599-7260, USA
- Signal Transduction Laboratory, NIEHS/NIH, 111 Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Mengchun Ye
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC 27599-7260, USA
- School of Chemical and Environmental Engineering, Wuyi University, Jiangmen, Guangdong 529020, PR China
| | - Xue-Tao Xu
- School of Chemical and Environmental Engineering, Wuyi University, Jiangmen, Guangdong 529020, PR China
| | - Ying Xu
- Departments of Behavioral Medicine & Psychiatry and Physiology, Pharmacology, Neuroscience, Rockefeller Neurosciences Institute, West Virginia University Health Sciences Center, Morgantown, WV 26506-9137, USA
| | | | - Han-Ting Zhang
- Departments of Behavioral Medicine & Psychiatry and Physiology, Pharmacology, Neuroscience, Rockefeller Neurosciences Institute, West Virginia University Health Sciences Center, Morgantown, WV 26506-9137, USA
| | - Guoqiang Song
- School of Pharmaceutical Engineering and life Sciences, Changzhou University, Changzhou, Jiangsu, 213164, PR China
| | - Hengming Ke
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC 27599-7260, USA
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19
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Vigone G, Shuhaibar LC, Egbert JR, Uliasz TF, Movsesian MA, Jaffe LA. Multiple cAMP Phosphodiesterases Act Together to Prevent Premature Oocyte Meiosis and Ovulation. Endocrinology 2018; 159:2142-2152. [PMID: 29608743 PMCID: PMC5913618 DOI: 10.1210/en.2018-00017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 03/22/2018] [Indexed: 12/27/2022]
Abstract
Luteinizing hormone (LH) acts on the granulosa cells that surround the oocyte in mammalian preovulatory follicles to cause meiotic resumption and ovulation. Both of these responses are mediated primarily by an increase in cyclic adenosine monophosphate (cAMP) in the granulosa cells, and the activity of cAMP phosphodiesterases (PDEs), including PDE4, contributes to preventing premature responses. However, two other cAMP-specific PDEs, PDE7 and PDE8, are also expressed at high levels in the granulosa cells, raising the question of whether these PDEs also contribute to preventing uncontrolled activation of meiotic resumption and ovulation. With the use of selective inhibitors, we show that inhibition of PDE7 or PDE8 alone has no effect on the cAMP content of follicles, and inhibition of PDE4 alone has only a small and variable effect. In contrast, a mixture of the three inhibitors elevates cAMP to a level comparable with that seen with LH. Correspondingly, inhibition of PDE7 or PDE8 alone has no effect on meiotic resumption or ovulation, and inhibition of PDE4 alone has only a partial and slow effect. However, the fraction of oocytes resuming meiosis and undergoing ovulation is increased when PDE4, PDE7, and PDE8 are simultaneously inhibited. PDE4, PDE7, and PDE8 also function together to suppress the premature synthesis of progesterone and progesterone receptors, which are required for ovulation. Our results indicate that three cAMP PDEs act in concert to suppress premature responses in preovulatory follicles.
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Affiliation(s)
- Giulia Vigone
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
- Correspondence: Giulia Vigone, PhD, or Laurinda A. Jaffe, PhD, Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 06030. E-mail: or
| | - Leia C Shuhaibar
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
| | - Jeremy R Egbert
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
| | - Tracy F Uliasz
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
| | - Matthew A Movsesian
- Cardiology Section, VA Salt Lake City Health Care System, and Division of Cardiovascular Medicine, University of Utah School of Medicine, Salt Lake City, Utah
| | - Laurinda A Jaffe
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
- Correspondence: Giulia Vigone, PhD, or Laurinda A. Jaffe, PhD, Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 06030. E-mail: or
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20
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Pogrmic-Majkic K, Samardzija D, Stojkov-Mimic N, Vukosavljevic J, Trninic-Pjevic A, Kopitovic V, Andric N. Atrazine suppresses FSH-induced steroidogenesis and LH-dependent expression of ovulatory genes through PDE-cAMP signaling pathway in human cumulus granulosa cells. Mol Cell Endocrinol 2018; 461:79-88. [PMID: 28859905 DOI: 10.1016/j.mce.2017.08.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 07/13/2017] [Accepted: 08/28/2017] [Indexed: 01/12/2023]
Abstract
Atrazine (ATR) alters female reproductive functions in different animal species. Here, we analyzed whether ATR disturbs steroidogenic and ovulatory processes in hormone-stimulated human cumulus granulosa cells and mechanism of its action. Results showed that treatment of human cumulus granulosa cells with 20 μM ATR for 48 h resulted in lower FSH-stimulated estradiol and progesterone production. ATR reduced mRNA levels of aromatase (CYP19A1), steroidogenic acute regulatory protein (STAR) and luteinizing hormone/choriogonadotropin receptor (LHCGR). Addition of hCG 48 h after FSH and ATR treatment did not trigger maximal expression of the ovulatory genes amphiregulin (AREG) and epiregulin (EREG). Mechanistic experiments showed that ATR activated cPDE and decreased cAMP level. Addition of total PDE and specific PDE4 inhibitors, IBMX and rolipram, prevented ATR's action on CYP19A1 and STAR mRNA expression in FSH-stimulated human cumulus granulosa cells. This study suggests that ATR alters steroidogenesis and ovulatory process in human cumulus granulosa cells jeopardizing female reproduction.
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Affiliation(s)
| | - Dragana Samardzija
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Serbia
| | - Natasa Stojkov-Mimic
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Serbia
| | - Jelena Vukosavljevic
- Clinic for Gynecology and Obstetrics, Clinical Center of Vojvodina, Novi Sad, Serbia
| | | | - Vesna Kopitovic
- Clinic for Gynecology and Obstetrics, Clinical Center of Vojvodina, Novi Sad, Serbia
| | - Nebojsa Andric
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Serbia
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21
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Chen TC, Chan N, Labib S, Yu J, Cho HY, Hofman FM, Schönthal AH. Induction of Pro-Apoptotic Endoplasmic Reticulum Stress in Multiple Myeloma Cells by NEO214, Perillyl Alcohol Conjugated to Rolipram. Int J Mol Sci 2018; 19:E277. [PMID: 29342125 PMCID: PMC5796223 DOI: 10.3390/ijms19010277] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 12/24/2017] [Accepted: 01/11/2018] [Indexed: 12/20/2022] Open
Abstract
Despite the introduction of new therapies for multiple myeloma (MM), many patients are still dying from this disease and novel treatments are urgently needed. We have designed a novel hybrid molecule, called NEO214, that was generated by covalent conjugation of the natural monoterpene perillyl alcohol (POH), an inducer of endoplasmic reticulum (ER) stress, to rolipram (Rp), an inhibitor of phosphodiesterase-4 (PDE4). Its potential anticancer effects were investigated in a panel of MM cell lines. We found that NEO214 effectively killed MM cells in vitro with a potency that was over an order of magnitude stronger than that of its individual components, either alone or in combination. The cytotoxic mechanism of NEO214 involved severe ER stress and prolonged induction of CCAAT/enhancer-binding protein homologous protein (CHOP), a key pro-apoptotic component of the ER stress response. These effects were prevented by salubrinal, a pharmacologic inhibitor of ER stress, and by CHOP gene knockout. Conversely, combination of NEO214 with bortezomib, a drug in clinical use for patients with MM, resulted in synergistic enhancement of MM cell death. Combination with the adenylate cyclase stimulant forskolin did not enhance NEO214 impact, indicating that cyclic adenosine 3',5'-monophosphate (AMP) pathways might play a lesser role. Our study introduces the novel agent NEO214 as a potent inducer of ER stress with significant anti-MM activity in vitro. It should be further investigated as a potential MM therapy aimed at exploiting this tumor's distinct sensitivity to ER stress.
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Affiliation(s)
- Thomas C Chen
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Nymph Chan
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Shirin Labib
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Jiali Yu
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Hee-Yeon Cho
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Florence M Hofman
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Axel H Schönthal
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
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22
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Zou M, Xi L, Rao J, Jing Y, Liao F, Yang X. [Optimization and evaluation of an inflammatory cell model in LPS-stimulated PMA-differentiated THP-1 cells]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2017; 33:1456-1461. [PMID: 29268846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective To develop an optimal inflammatory cell model from lipopolysaccharide (LPS)-stimulated phorbol ester (PMA)-differentiated THP-1 cells, and investigate its response to anti-inflammatory agent phosphodiesterase inhibitor rolipram. Methods THP-1 cells were differentiated by PMA and stimulated by LPS to release inflammatory factors in cell supernatants, like tumor necrosis factor α (TNF-α) and interleukin 6 (IL-6), which were detected by ELISA. The doses and durations of both PMA and LPS treatment were optimized to develop the inflammatory cell model. Rolipram was added along with LPS after PMA differentiation to assess the response of cells to the anti-inflammatory agent. Results THP-1 cells showed no significant differences in cell morphology between PMA treatment for 24 hours and for 48 hours, but significantly high levels of TNF-α and IL-6 were released under LPS treatment. TNF-α level increased significantly after the differentiation by PMA at 100 ng/mL in comparison with that at 50 ng/mL, and it increased in a LPS dose-depended manner untill a plateau at 0.2 μg/mL LPS; the secretion level of IL-6 increased remarkably when THP-1 cells were induced by PMA at 100 ng/mL and stimulated by LPS≥1 μg/mL. The inflammatory cell model made using PMA at 100 ng/mL and LPS at 0.5 μg/mL was more sensitive to the anti-inflammatory agent rolipram, compared with that by 0.1 μg/mL LPS. Conclusion PMA at 100 ng/mL was selected for the differentiation of THP-1 cells with the enhanced responsiveness to LPS stimulation; THP-1 cells by the induction of PMA at 100 ng/mL coupled with the stimulation of LPS at no less than 0.2 μg/mL was an optimal inflammatory cell model for significant secretion of TNF-α and IL-6, which was sensitive to the action of anti-inflammatory agents.
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Affiliation(s)
- Mingyue Zou
- Ministry-of-Education Key Laboratory of Laboratory Medical Diagnostics, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Lei Xi
- Ministry-of-Education Key Laboratory of Laboratory Medical Diagnostics, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Jingjing Rao
- Ministry-of-Education Key Laboratory of Laboratory Medical Diagnostics, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Yixian Jing
- Ministry-of-Education Key Laboratory of Laboratory Medical Diagnostics, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Fei Liao
- Ministry-of-Education Key Laboratory of Laboratory Medical Diagnostics, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Xiaolan Yang
- Ministry-of-Education Key Laboratory of Laboratory Medical Diagnostics, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China. *Corresponding author, E-mail:
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23
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Pan Y, Xu C, Pan ZK. MKP-1 negative regulates Staphylococcus aureus induced inflammatory responses in Raw264.7 cells: roles of PKA-MKP-1 pathway and enhanced by rolipram. Sci Rep 2017; 7:12366. [PMID: 28959039 PMCID: PMC5620070 DOI: 10.1038/s41598-017-10187-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 08/02/2017] [Indexed: 11/22/2022] Open
Abstract
MAP phosphatases (MKP)-1 acts as an important regulator of innate immune response through a mechanism of control and attention both MAPK and NF-κB molecules during bacterial infection. However, the regulatory role of MKP-1 in the interplay between MAPK and NFκB pathway molecules is still not fully understood. In present study, we showed a direct interactions of p38, ERK or IκBα with MKP-1, and demonstrated that MKP-1 was a pivotal feedback control for both MAP kinases and NF-κB pathway in response to S. aureus. In addition, we found that rolipram had anti-inflammatory activity and repressed IκBα activation induced by S. aureus via PKA-MKP-1 pathway. Our report also demonstrated that PKA-cα can directly bind to IκBα upon S. aureus stimulation, which influenced the downstream signaling of PKA pathway, including altered the expression of MKP-1. These results presented a novel mechanism of PKA and IκB pathway, which may be targeted for treating S. aureus infection.
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Affiliation(s)
- Yiqing Pan
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine, Toledo, OH, 43614, USA
- Department of Anatomy, Histology and Embryology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Key Laboratory of Reproductive Medicine, Shanghai, 200025, China
| | - Chen Xu
- Department of Anatomy, Histology and Embryology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
- Shanghai Key Laboratory of Reproductive Medicine, Shanghai, 200025, China.
| | - Zhixing K Pan
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine, Toledo, OH, 43614, USA.
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24
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Avila DV, Myers SA, Zhang J, Kharebava G, McClain CJ, Kim HY, Whittemore SR, Gobejishvili L, Barve S. Phosphodiesterase 4b expression plays a major role in alcohol-induced neuro-inflammation. Neuropharmacology 2017; 125:376-385. [PMID: 28807677 DOI: 10.1016/j.neuropharm.2017.08.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 08/09/2017] [Indexed: 02/07/2023]
Abstract
It is increasingly evident that alcohol-induced, gut-mediated peripheral endotoxemia plays a significant role in glial cell activation and neuro-inflammation. Using a mouse model of chronic alcohol feeding, we examined the causal role of endotoxin- and cytokine-responsive Pde4 subfamily b (Pde4b) expression in alcohol-induced neuro-inflammation. Both pharmacologic and genetic approaches were used to determine the regulatory role of Pde4b. In C57Bl/6 wild type (WT) alcohol fed (WT-AF) animals, alcohol significantly induced peripheral endotoxemia and Pde4b expression in brain tissue, accompanied by a decrease in cAMP levels. Further, along with Pde4b, there was a robust activation of astrocytes and microglia accompanied by significant increases in the inflammatory cytokines (Tnfα, Il-1β, Mcp-1 and Il-17) and the generalized inflammatory marker Cox-2. At the cellular level, alcohol and inflammatory mediators, particularly LPS, Tnfα and Hmgb1 significantly activated microglial cells (Iba-1 expression) and selectively induced Pde4b expression with a minimal to no change in Pde4a and d isoforms. In comparison, the alcohol-induced decrease in brain cAMP levels was completely inhibited in WT mice treated with the Pde4 specific pharmacologic inhibitor rolipram and in Pde4b-/- mice. Moreover, all the observed markers of alcohol-induced brain inflammation were markedly attenuated. Importantly, glial cell activation induced by systemic endotoxemia (LPS administration) was also markedly decreased in Pde4b-/- mice. Taken together, these findings strongly support the notion that Pde4b plays a critical role in coordinating alcohol-induced, peripheral endotoxemia mediated neuro-inflammation and could serve as a significant therapeutic target.
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Affiliation(s)
- Diana V Avila
- University of Louisville Alcohol Research Center, University of Louisville School of Medicine, Louisville, KY, USA; Department of Internal Medicine, University of Louisville School of Medicine, Louisville, KY, USA; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Scott A Myers
- Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA; Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, KY, USA
| | - JingWen Zhang
- University of Louisville Alcohol Research Center, University of Louisville School of Medicine, Louisville, KY, USA; Department of Internal Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Giorgi Kharebava
- Laboratory of Molecular Signaling, DICBR, NIAAA, NIH, Bethesda, MD, USA
| | - Craig J McClain
- University of Louisville Alcohol Research Center, University of Louisville School of Medicine, Louisville, KY, USA; Department of Internal Medicine, University of Louisville School of Medicine, Louisville, KY, USA; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Hee-Yong Kim
- Laboratory of Molecular Signaling, DICBR, NIAAA, NIH, Bethesda, MD, USA
| | - Scott R Whittemore
- Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA; Anatomical Sciences & Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA; Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, KY, USA
| | - Leila Gobejishvili
- University of Louisville Alcohol Research Center, University of Louisville School of Medicine, Louisville, KY, USA; Department of Internal Medicine, University of Louisville School of Medicine, Louisville, KY, USA; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA.
| | - Shirish Barve
- University of Louisville Alcohol Research Center, University of Louisville School of Medicine, Louisville, KY, USA; Department of Internal Medicine, University of Louisville School of Medicine, Louisville, KY, USA; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA.
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25
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Liu RY, Neveu C, Smolen P, Cleary LJ, Byrne JH. Superior long-term synaptic memory induced by combining dual pharmacological activation of PKA and ERK with an enhanced training protocol. Learn Mem 2017; 24:289-297. [PMID: 28620076 PMCID: PMC5473109 DOI: 10.1101/lm.044834.116] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 04/13/2017] [Indexed: 02/06/2023]
Abstract
Developing treatment strategies to enhance memory is an important goal of neuroscience research. Activation of multiple biochemical signaling cascades, such as the protein kinase A (PKA) and extracellular signal-regulated kinase (ERK) pathways, is necessary to induce long-term synaptic facilitation (LTF), a correlate of long-term memory (LTM). Previously, a computational model was developed which correctly predicted a novel enhanced training protocol that augmented LTF by searching for the protocol with maximal overlap of PKA and ERK activation. The present study focused on pharmacological approaches to enhance LTF. Combining an ERK activator, NSC, and a PKA activator, rolipram, enhanced LTF to a greater extent than did either drug alone. An even greater increase in LTF occurred when rolipram and NSC were combined with the Enhanced protocol. These results indicate superior memory can be achieved by enhanced protocols that take advantage of the structure and dynamics of the biochemical cascades underlying memory formation, used in conjunction with combinatorial pharmacology.
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Affiliation(s)
- Rong-Yu Liu
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Curtis Neveu
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Paul Smolen
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Leonard J Cleary
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - John H Byrne
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
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Wang W, Li Y, Zhu JY, Fang D, Ding HF, Dong Z, Jing Q, Su SB, Huang S. Triple negative breast cancer development can be selectively suppressed by sustaining an elevated level of cellular cyclic AMP through simultaneously blocking its efflux and decomposition. Oncotarget 2016; 7:87232-87245. [PMID: 27901486 PMCID: PMC5349984 DOI: 10.18632/oncotarget.13601] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/07/2016] [Indexed: 01/13/2023] Open
Abstract
Triple negative breast cancer (TNBC) has the highest mortality among all breast cancer types and lack of targeted therapy is a key factor contributing to its high mortality rate. In this study, we show that 8-bromo-cAMP, a cyclic adenosine monophosphate (cAMP) analog at high concentration (> 1 mM) selectively suppresses TNBC cell growth. However, commonly-used cAMP-elevating agents such as adenylyl cyclase activator forskolin and pan phosphodiesterase inhibitor 3-isobutyl-1-methylxanthine (IBMX) are ineffective. Inability of cAMP elevating agents to inhibit TNBC cell growth is due to rapid diminution of cellular cAMP through efflux and decomposition. By performing bioinformatics analyses with publically available gene expression datasets from breast cancer patients/established breast cancer cell lines and further validating using specific inhibitors/siRNAs, we reveal that multidrug resistance-associated protein 1/4 (MRP1/4) mediate rapid cAMP efflux while members PDE4 subfamily facilitate cAMP decomposition. When cAMP clearance is prevented by specific inhibitors, forskolin blocks TNBC's in vitro cell growth by arresting cell cycle at G1/S phase. Importantly, cocktail of forskolin, MRP inhibitor probenecid and PDE4 inhibitor rolipram suppresses TNBC in vivo tumor development. This study suggests that a TNBC-targeted therapeutic strategy can be developed by sustaining an elevated level of cAMP through simultaneously blocking its efflux and decomposition.
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Affiliation(s)
- Wei Wang
- 1 Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yue Li
- 2 Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Jessica Y. Zhu
- 2 Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Dongdong Fang
- 1 Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Han-Fei Ding
- 3 Georgia Cancer Center, Augusta University, Augusta, GA, USA
| | - Zheng Dong
- 4 Department of Anatomy and Cell Biology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Qing Jing
- 5 Changhai Hospital, Shanghai, China
| | - Shi-Bing Su
- 1 Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- 6 E-institute of Shanghai Municipal Education Committee, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shuang Huang
- 1 Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- 2 Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
- 6 E-institute of Shanghai Municipal Education Committee, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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27
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Miklos W, Heffeter P, Pirker C, Hager S, Kowol CR, van Schoonhoven S, Stojanovic M, Keppler BK, Berger W. Loss of phosphodiesterase 4D mediates acquired triapine resistance via Epac-Rap1-Integrin signaling. Oncotarget 2016; 7:84556-84574. [PMID: 27602951 PMCID: PMC5356681 DOI: 10.18632/oncotarget.11821] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 08/24/2016] [Indexed: 12/27/2022] Open
Abstract
Triapine, an anticancer thiosemicarbazone, is currently under clinical investigation. Whereas promising results were obtained in hematological diseases, trials in solid tumors widely failed. To understand mechanisms causing triapine insensitivity, we have analysed genomic alterations in a triapine-resistant SW480 subline (SW480/tria). Only one distinct genomic loss was observed specifically in SW480/tria cells affecting the phosphodiesterase 4D (PDE4D) gene locus. Accordingly, pharmacological inhibition of PDE4D resulted in significant triapine resistance in SW480 cells. Hence, we concluded that enhanced cyclic AMP levels might confer protection against triapine. Indeed, hyperactivation of both major downstream pathways, namely the protein kinase A (PKA)-cAMP response element-binding protein (Creb) and the exchange protein activated by cAMP (Epac)-Ras-related protein 1 (Rap1) signaling axes, was observed in SW480/tria cells. Unexpectedly, inhibition of PKA did not re-sensitize SW480/tria cells against triapine. In contrast, Epac activation resulted in distinct triapine resistance in SW480 cells. Conversely, knock-down of Epac expression and pharmacological inhibition of Rap1 re-sensitized SW480/tria cells against triapine. Rap1 is a well-known regulator of integrins. Accordingly, SW480/tria cells displayed enhanced plasma membrane expression of several integrin subunits, enhanced adhesion especially to RGD-containing matrix components, and bolstered activation/expression of the integrin downstream effectors Src and RhoA/Rac. Accordingly, integrin and Src inhibition resulted in potent triapine re-sensitization especially of SW480/tria cells. In summary, we describe for the first time integrin activation based on cAMP-Epac-Rap1 signaling as acquired drug resistance mechanism. combinations of triapine with inhibitors of several steps in this resistance cascade might be feasible strategies to overcome triapine insensitivity of solid tumors.
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Affiliation(s)
- Walter Miklos
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, A-1090 Vienna, Austria
| | - Petra Heffeter
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, A-1090 Vienna, Austria
- Research Platform “Translational Cancer Therapy Research”, University Vienna and Medical University Vienna, Vienna, Austria
| | - Christine Pirker
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, A-1090 Vienna, Austria
| | - Sonja Hager
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, A-1090 Vienna, Austria
| | - Christian R. Kowol
- Institute of Inorganic Chemistry, University of Vienna, A-1090 Vienna, Austria
- Research Platform “Translational Cancer Therapy Research”, University Vienna and Medical University Vienna, Vienna, Austria
| | - Sushilla van Schoonhoven
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, A-1090 Vienna, Austria
| | - Mirjana Stojanovic
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, A-1090 Vienna, Austria
| | - Bernhard K. Keppler
- Institute of Inorganic Chemistry, University of Vienna, A-1090 Vienna, Austria
- Research Platform “Translational Cancer Therapy Research”, University Vienna and Medical University Vienna, Vienna, Austria
| | - Walter Berger
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, A-1090 Vienna, Austria
- Research Platform “Translational Cancer Therapy Research”, University Vienna and Medical University Vienna, Vienna, Austria
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Fernández-Martínez E, Ponce-Monter H, Soria-Jasso LE, Ortiz MI, Arias-Montaño JA, Barragán-Ramírez G, Mayén-García C. Inhibition of Uterine Contractility by Thalidomide Analogs via Phosphodiesterase-4 Inhibition and Calcium Entry Blockade. Molecules 2016; 21:molecules21101332. [PMID: 27739411 PMCID: PMC6273742 DOI: 10.3390/molecules21101332] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/21/2016] [Accepted: 09/30/2016] [Indexed: 12/02/2022] Open
Abstract
Uterine relaxation is crucial during preterm labor. Phosphodiesterase-4 (PDE-4) inhibitors have been proposed as tocolytics. Some thalidomide analogs are PDE-4 inhibitors. The aim of this study was to assess the uterus-relaxant properties of two thalidomide analogs, methyl 3-(4-nitrophthalimido)-3-(3,4-dimethoxyphenyl)-propanoate (4NO2PDPMe) and methyl 3-(4-aminophthalimido)-3-(3,4-dimethoxyphenyl)-propanoate (4APDPMe) and were compared to rolipram in functional studies of spontaneous phasic, K+-induced tonic, and Ca2+-induced contractions in isolated pregnant human myometrial tissues. The accumulation of cAMP was quantified in HeLa cells. The presence of PDE-4B2 and phosphorylated myosin light-chain (pMLC), in addition to the effect of thalidomide analogs on oxytocin-induced pMLC, were assessed in human uterine myometrial cells (UtSMCs). Thalidomide analogs had concentration-dependent inhibitory effects on spontaneous and tonic contractions and inhibited Ca2+-induced responses. Tonic contraction was equipotently inhibited by 4APDPMe and rolipram (IC50 = 125 ± 13.72 and 98.45 ± 8.86 µM, respectively). Rolipram and the thalidomide analogs inhibited spontaneous and tonic contractions equieffectively. Both analogs increased cAMP accumulation in a concentration-dependent manner (p < 0.05) and induced changes in the subcellular localization of oxytocin-induced pMLC in UtSMCs. The inhibitory effects of thalidomide analogs on the contractions of pregnant human myometrium tissue may be due to their PDE-4 inhibitory effect and novel mechanism as calcium-channel blockers.
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Affiliation(s)
- Eduardo Fernández-Martínez
- Centro de Investigación en Biología de la Reproducción, Área Académica de Medicina del Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Pachuca 42090, Hidalgo, México.
| | - Héctor Ponce-Monter
- Centro de Investigación en Biología de la Reproducción, Área Académica de Medicina del Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Pachuca 42090, Hidalgo, México.
| | - Luis E Soria-Jasso
- Centro de Investigación en Biología de la Reproducción, Área Académica de Medicina del Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Pachuca 42090, Hidalgo, México.
| | - Mario I Ortiz
- Centro de Investigación en Biología de la Reproducción, Área Académica de Medicina del Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Pachuca 42090, Hidalgo, México.
| | - José-Antonio Arias-Montaño
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, Apdo. Postal 14-740, México City 07360, México.
| | | | - Cynthia Mayén-García
- Centro de Investigación en Biología de la Reproducción, Área Académica de Medicina del Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Pachuca 42090, Hidalgo, México.
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Zhuo Y, Guo H, Cheng Y, Wang C, Wang C, Wu J, Zou Z, Gan D, Li Y, Xu J. Inhibition of phosphodiesterase-4 reverses the cognitive dysfunction and oxidative stress induced by Aβ25-35 in rats. Metab Brain Dis 2016; 31:779-91. [PMID: 26920899 DOI: 10.1007/s11011-016-9814-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 02/23/2016] [Indexed: 02/05/2023]
Abstract
Phosphodiesterase-4 (PDE4) inhibitors prevent the breakdown of the second messenger cAMP and have been demonstrated to improve learning in several animal models of cognition. In this study, we explored the antioxidative effects of rolipram in Alzheimer's disease (AD) by using bilateral Aβ25-35 injection into the hippocampus of rats, which were used as an AD model. Rats received 3 intraperitoneal (i.p.) doses of rolipram (0.1, 0.5 and 1.25 mg/kg) daily after the injection of Aβ25-35 for 25 days. Chronic administration of rolipram prevented the memory impairments induced by Aβ25-35, as assessed using the passive avoidance test and the Morris water maze test. Furthermore, rolipram significantly reduced the oxidative stress induced by Aβ25-35, as evidenced by the decrease in the levels of reactive oxygen species (ROS) and malondialdehyde (MDA), and restored the reduced GSH levels and superoxide dismutase (SOD) activity. Moreover, western blotting and real-time reverse transcription polymerase chain reaction (RT-PCR) analysis showed that rolipram remarkably upregulated thioredoxin (Trx) and inhibited the inducible nitric oxide synthase/nitric oxide (iNOS/NO) pathway in the hippocampus. These results demonstrated that rolipram improved the learning and memory abilities in an Aβ25-35-induced AD rat model. The mechanism underlying these effects may be due to the noticeable antioxidative effects of rolipram.
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Affiliation(s)
- Yeye Zhuo
- Department of Pharmacology, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
- The first affiliated hospital of Shantou University Medical College, Shantou, Guangdong, 515041, China
| | - Haibiao Guo
- Department of Pharmacology, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Yufang Cheng
- Department of Pharmacology, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Chuang Wang
- Ningbo Key Laboratory of Behavioral Neuroscience, 818 Fenghua Road, Ningbo, Zhejiang, 315211, China
| | - Canmao Wang
- Department of Pharmacy, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong, 518000, China
| | - Jingang Wu
- Department of Pharmacology, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Zhengqiang Zou
- Department of Pharmacology, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Danna Gan
- Department of Pharmacy, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong, 518000, China
| | - Yiwen Li
- Department of Pharmacology, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Jiangping Xu
- Department of Pharmacology, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China.
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García-Hernández V, Sarmiento N, Sánchez-Bernal C, Coveñas R, Hernández-Hernández A, Calvo JJ, Sánchez-Yagüe J. Changes in the expression of LIMP-2 during cerulein-induced pancreatitis in rats: Effect of inhibition of leukocyte infiltration, cAMP and MAPKs early on in its development. Int J Biochem Cell Biol 2016; 72:109-117. [PMID: 26794464 DOI: 10.1016/j.biocel.2016.01.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 12/28/2015] [Accepted: 01/15/2016] [Indexed: 12/26/2022]
Abstract
Lysosomal integral membrane protein-2 (LIMP-2) is an important protein in lysosomal biogenesis and function and also plays a role in the tissue inflammatory response. It is known that lysosomes play a central role in acute pancreatitis, with inflammatory cell infiltration triggering the disease early on. In this study we report increases in pancreatic LIMP-2 protein and mRNA levels as early events that occur during the development of cerulein (Cer)-induced acute pancreatitis (AP) in rats. GdCl3, a macrophage inhibitor, but not FK506, a T lymphocyte inhibitor, was able to reverse the increase in LIMP-2 expression after Cer treatment, although such reversion was abolished if the animals were depleted of neutrophils due to a vinblastine sulfate pre-treatment. Immunostaining revealed that the cellular source of LIMP-2 was mainly acinar cells. Additionally, pre-treatments with the MAPKs inhibitors SP600125 and PD98059, inhibitors of JNK and ERK½ activation, respectively, but not of rolipram, a type IV phosphodiesterase inhibitor, suppressed the increase in the expression of LIMP-2 after Cer administration. Together, these results indicate that neutrophils are able to drive a macrophage activation that would regulate the increase in LIMP-2 expression during the early phase of Cer-induced AP, with the stress kinases JNK and ERK½ also playing a coordinated role in the increase of LIMP-2 expression due to Cer.
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Affiliation(s)
- Violeta García-Hernández
- Department of Biochemistry and Molecular Biology, University of Salamanca, IBSAL (Instituto de Investigación Biomédica de Salamanca), Spain
| | - Nancy Sarmiento
- Department of Biochemistry and Molecular Biology, University of Salamanca, IBSAL (Instituto de Investigación Biomédica de Salamanca), Spain
| | - Carmen Sánchez-Bernal
- Department of Biochemistry and Molecular Biology, University of Salamanca, IBSAL (Instituto de Investigación Biomédica de Salamanca), Spain
| | - Rafael Coveñas
- Institute of Neurosciences of Castilla y León (INCYL), University of Salamanca, Spain
| | - Angel Hernández-Hernández
- Department of Biochemistry and Molecular Biology, University of Salamanca, IBSAL (Instituto de Investigación Biomédica de Salamanca), Spain
| | - José J Calvo
- Department of Physiology and Pharmacology, University of Salamanca, IBSAL (Instituto de Investigación Biomédica de Salamanca), Spain
| | - Jesús Sánchez-Yagüe
- Department of Biochemistry and Molecular Biology, University of Salamanca, IBSAL (Instituto de Investigación Biomédica de Salamanca), Spain.
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Mack SG, Cook DJ, Dhurjati P, Butchbach MER. Systems biology investigation of cAMP modulation to increase SMN levels for the treatment of spinal muscular atrophy. PLoS One 2014; 9:e115473. [PMID: 25514431 PMCID: PMC4267815 DOI: 10.1371/journal.pone.0115473] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Accepted: 11/24/2014] [Indexed: 12/31/2022] Open
Abstract
Spinal muscular atrophy (SMA), a leading genetic cause of infant death worldwide, is an autosomal recessive disorder caused by the loss of SMN1 (survival motor neuron 1), which encodes the protein SMN. The loss of SMN1 causes a deficiency in SMN protein levels leading to motor neuron cell death in the anterior horn of the spinal cord. SMN2, however, can also produce some functional SMN to partially compensate for loss of SMN1 in SMA suggesting increasing transcription of SMN2 as a potential therapy to treat patients with SMA. A cAMP response element was identified on the SMN2 promoter, implicating cAMP activation as a step in the transcription of SMN2. Therefore, we investigated the effects of modulating the cAMP signaling cascade on SMN production in vitro and in silico. SMA patient fibroblasts were treated with the cAMP signaling modulators rolipram, salbutamol, dbcAMP, epinephrine and forskolin. All of the modulators tested were able to increase gem formation, a marker for SMN protein in the nucleus, in a dose-dependent manner. We then derived two possible mathematical models simulating the regulation of SMN2 expression by cAMP signaling. Both models fit well with our experimental data. In silico treatment of SMA fibroblasts simultaneously with two different cAMP modulators resulted in an additive increase in gem formation. This study shows how a systems biology approach can be used to develop potential therapeutic targets for treating SMA.
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Affiliation(s)
- Sean G. Mack
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, Delaware, United States of America
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware, United States of America
| | - Daniel J. Cook
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware, United States of America
| | - Prasad Dhurjati
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware, United States of America
| | - Matthew E. R. Butchbach
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, Delaware, United States of America
- Center for Pediatric Research, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, Delaware, United States of America
- Department of Biological Sciences, University of Delaware, Newark, Delaware, United States of America
- Department of Pediatrics, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
- * E-mail:
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Radeva MY, Kugelmann D, Spindler V, Waschke J. PKA compartmentalization via AKAP220 and AKAP12 contributes to endothelial barrier regulation. PLoS One 2014; 9:e106733. [PMID: 25188285 PMCID: PMC4154725 DOI: 10.1371/journal.pone.0106733] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 08/07/2014] [Indexed: 01/14/2023] Open
Abstract
cAMP-mediated PKA signaling is the main known pathway involved in maintenance of the endothelial barrier. Tight regulation of PKA function can be achieved by discrete compartmentalization of the enzyme via physical interaction with A-kinase anchoring proteins (AKAPs). Here, we investigated the role of AKAPs 220 and 12 in endothelial barrier regulation. Analysis of human and mouse microvascular endothelial cells as well as isolated rat mesenteric microvessels was performed using TAT-Ahx-AKAPis peptide, designed to competitively inhibit PKA-AKAP interaction. In vivo microvessel hydraulic conductivity and in vitro transendothelial electrical resistance measurements showed that this peptide destabilized endothelial barrier properties, and dampened the cAMP-mediated endothelial barrier stabilization induced by forskolin and rolipram. Immunofluorescence analysis revealed that TAT-Ahx-AKAPis led to both adherens junctions and actin cytoskeleton reorganization. Those effects were paralleled by redistribution of PKA and Rac1 from endothelial junctions and by Rac1 inactivation. Similarly, membrane localization of AKAP220 was also reduced. In addition, depletion of either AKAP12 or AKAP220 significantly impaired endothelial barrier function and AKAP12 was also shown to interfere with cAMP-mediated barrier enhancement. Furthermore, immunoprecipitation analysis demonstrated that AKAP220 interacts not only with PKA but also with VE-cadherin and ß-catenin. Taken together, these results indicate that AKAP-mediated PKA subcellular compartmentalization is involved in endothelial barrier regulation. More specifically, AKAP220 and AKAP12 contribute to endothelial barrier function and AKAP12 is required for cAMP-mediated barrier stabilization.
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Affiliation(s)
- Mariya Y. Radeva
- Institute of Anatomy and Cell Biology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Daniela Kugelmann
- Institute of Anatomy and Cell Biology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Volker Spindler
- Institute of Anatomy and Cell Biology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Jens Waschke
- Institute of Anatomy and Cell Biology, Ludwig-Maximilians-University Munich, Munich, Germany
- * E-mail:
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Cheng ZB, Deng YL, Fan CQ, Han QH, Lin SL, Tang GH, Luo HB, Yin S. Prostaglandin Derivatives: Nonaromatic Phosphodiesterase-4 Inhibitors from the Soft Coral Sarcophyton ehrenbergi. J Nat Prod 2014; 77:1928-1936. [PMID: 25075977 DOI: 10.1021/np500394d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Ten new prostaglandin derivatives (PGs), sarcoehrendins A-J (1-10), together with five known analogues (11-15) were isolated from the soft coral Sarcophyton ehrenbergi. Compounds 4-8 represented the first examples of PGs featuring an 18-ketone group. The structures including the absolute configurations were elucidated on the basis of spectroscopic analysis and chemical evidence. All of the isolates and six synthetic analogues (3a, 3b, 4a, and 11a-11c) were screened for inhibitory activity against phosphodiesterase-4 (PDE4), which is a drug target for the treatment of asthma and chronic obstructive pulmonary disease. Compounds 2, 10, 11a, 11b, and 13-15 exhibited inhibition with IC50 values less than 10 μM, and compound 15 (IC50 = 1.4 μM) showed comparable activity to the positive control rolipram (IC50 = 0.60 μM). The active natural PGs (2, 10, and 13-15) represent the first examples of PDE4 inhibitors without an aromatic moiety, and a preliminary structure-activity relationship is also proposed.
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Affiliation(s)
- Zhong-Bin Cheng
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
| | - Ya-Lin Deng
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
| | - Cheng-Qi Fan
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences , Shanghai 200090, People's Republic of China
| | - Qing-Hua Han
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
| | - Shu-Ling Lin
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
| | - Gui-Hua Tang
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
| | - Hai-Bin Luo
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
| | - Sheng Yin
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
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Liu Z, Liu Y, Gao R, Li H, Dunn T, Wu P, Smith RG, Sarkar PS, Fang X. Ethanol suppresses PGC-1α expression by interfering with the cAMP-CREB pathway in neuronal cells. PLoS One 2014; 9:e104247. [PMID: 25099937 PMCID: PMC4123904 DOI: 10.1371/journal.pone.0104247] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 06/25/2014] [Indexed: 11/26/2022] Open
Abstract
Alcohol intoxication results in neuronal apoptosis, neurodegeneration and manifest with impaired balance, loss of muscle coordination and behavioral changes. One of the early events of alcohol intoxication is mitochondrial (Mt) dysfunction and disruption of intracellular redox homeostasis. The mechanisms by which alcohol causes Mt dysfunction, disrupts cellular redox homeostasis and triggers neurodegeneration remains to be further investigated. Proliferator-activated receptor gamma co-activator 1-alpha (PGC-1α) plays critical roles in regulating Mt biogenesis and respiration, cellular antioxidant defense mechanism, and maintenance of neuronal integrity and function. In this study, we sought to investigate whether alcohol causes Mt dysfunction and triggers neurodegeneration by suppressing PGC-1α expression. We report that ethanol suppresses PGC-1α expression, and impairs mitochondrial function and enhances cellular toxicity in cultured neuronal cell line and also in human fetal brain neural stem cell-derived primary neurons. Moreover, we report that cells over-expressing exogenous PGC-1α or treated with Rolipram, a selective phosphodiesterase-4 inhibitor, ameliorate alcohol-induced cellular toxicity. Further analysis show that ethanol decreases steady-state intracellular cAMP levels, and thus depletes phosphorylation of cAMP-response element binding protein (p-CREB), the key transcription factor that regulates transcription of PGC-1α gene. Accordingly, we found PGC-1α promoter activity and transcription was dramatically repressed in neuronal cells when exposed to ethanol, suggesting that ethanol blunts cAMP→CREB signaling pathway to interfere with the transcription of PGC-1α. Ethanol-mediated decrease in PGC-1α activity results in the disruption of Mt respiration and function and higher cellular toxicity. This study might lead to potential therapeutic intervention to ameliorate alcohol-induced apoptosis and/or neurodegeneration by targeting PGC-1α.
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Affiliation(s)
- Zilong Liu
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Yongping Liu
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Rui Gao
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Haixia Li
- Department of Internal Medicine/Gastroenterology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Tiffany Dunn
- Department of Neuroscience & Cell Biology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Ping Wu
- Department of Neuroscience & Cell Biology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Robert G. Smith
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Partha S. Sarkar
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Department of Neuroscience & Cell Biology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Xiang Fang
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
- * E-mail:
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Lin TT, Huang YY, Tang GH, Cheng ZB, Liu X, Luo HB, Yin S. Prenylated coumarins: natural phosphodiesterase-4 inhibitors from Toddalia asiatica. J Nat Prod 2014; 77:955-962. [PMID: 24597921 DOI: 10.1021/np401040d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bioassay-guided fractionation of the ethanolic extract of the roots of Toddalia asiatica led to the isolation of seven new prenylated coumarins (1-7) and 14 known analogues (8-21). The structures of 1-7 were elucidated by spectroscopic analysis, and their absolute configurations were determined by combined chemical methods and chiral separation analysis. Compounds 1-5, named toddalin A, 3‴-O-demethyltoddalin A, and toddalins B-D, represent an unusual group of phenylpropenoic acid-coupled prenylated coumarins. Compounds 1-21 and four modified analogues, 10a, 11a, 13a, and 17a, were screened by using tritium-labeled adenosine 3',5'-cyclic monophosphate ([3H]-cAMP) as substrate for their inhibitory activity against phosphodiesterase-4 (PDE4), which is a drug target for the treatment of asthma and chronic obstructive pulmonary disease. Compounds 3, 8, 10, 10a, 11, 11a, 12, 13, 17, and 21 exhibited inhibition with IC50 values less than 10 μM. Toddacoumalone (8), the most active compound (IC50=0.14 μM), was more active than the positive control, rolipram (IC50=0.59 μM). In addition, the structure-activity relationship and possible inhibitory mechanism of the active compounds are also discussed.
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Affiliation(s)
- Ting-Ting Lin
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
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Schymeinsky J, Mayer H, Tomsic C, Tilp C, Schuetz JD, Cui Y, Wollin L, Gantner F, Erb KJ. The absence of mrp4 has no effect on the recruitment of neutrophils and eosinophils into the lung after LPS, cigarette smoke or allergen challenge. PLoS One 2013; 8:e61193. [PMID: 23613808 PMCID: PMC3632556 DOI: 10.1371/journal.pone.0061193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 03/09/2013] [Indexed: 01/06/2023] Open
Abstract
The multidrug resistance protein 4 (Mrp4) is an ATP-binding cassette transporter that is capable of exporting the second messenger cAMP from cells, a process that might regulate cAMP-mediated anti-inflammatory processes. However, using LPS- or cigarette smoke (CS)-inflammation models, we found that neutrophil numbers in the bronchoalveolar lavage fluid (BALF) were similar in Mrp4−/− and Mrp4+/+ mice treated with LPS or CS. Similarly, neutrophil numbers were not reduced in the BALF of LPS-challenged wt mice after treatment with 10 or 30 mg/kg of the Mrp1/4 inhibitor MK571. The absence of Mrp4 also had no impact on the influx of eosinophils or IL-4 and IL-5 levels in the BALF after OVA airway challenge in mice sensitized with OVA/alum. LPS-induced cytokine release in whole blood ex vivo was also not affected by the absence of Mrp4. These data clearly suggest that Mrp4 deficiency alone is not sufficient to reduce inflammatory processes in vivo. We hypothesized that in combination with PDE4 inhibitors, used at suboptimal concentrations, the anti-inflammatory effect would be more pronounced. However, LPS-induced neutrophil recruitment into the lung was no different between Mrp4−/− and Mrp4+/+ mice treated with 3 mg/kg Roflumilast. Finally, the single and combined administration of 10 and 30 mg/kg MK571 and the specific breast cancer resistance protein (BCRP) inhibitor KO143 showed no reduction of LPS-induced TNFα release into the BALF compared to vehicle treated control animals. Similarly, LPS-induced TNFα release in murine whole blood of Mrp4+/+ or Mrp4−/− mice was not reduced by KO143 (1, 10 µM). Thus, BCRP seems not to be able to compensate for the absence or inhibition of Mrp4 in the used models. Taken together, our data suggest that Mrp4 is not essential for the recruitment of neutrophils into the lung after LPS or CS exposure or of eosinophils after allergen exposure.
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Affiliation(s)
- Jürgen Schymeinsky
- Respiratory Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach a.d. Riss, Germany.
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Park JW, Ryter SW, Kyung SY, Lee SP, Jeong SH. The phosphodiesterase 4 inhibitor rolipram protects against cigarette smoke extract-induced apoptosis in human lung fibroblasts. Eur J Pharmacol 2013; 706:76-83. [PMID: 23499692 DOI: 10.1016/j.ejphar.2013.02.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 02/14/2013] [Accepted: 02/24/2013] [Indexed: 11/30/2022]
Abstract
Cigarette smoke, a major causative agent of chronic obstructive pulmonary disease (COPD), induces lung cell death by incompletely understood mechanisms. The induction of apoptosis in lung structural cells by cigarette smoke may contribute to the pathogenesis of emphysema. Phosphodiesterase-4 (PDE4) inhibitors are anti-inflammatory agents used in COPD therapy that can prevent cigarette smoke-induced emphysema in mice. We investigated the effect of rolipram, a first generation PDE4 inhibitor, on the regulation of cigarette smoke-induced apoptosis. Human lung fibroblast (MRC-5) cells were exposed to cigarette smoke extract (CSE). Cell viability and apoptosis were determined by MTT assay and Annexin-V staining, respectively. Caspase activation was determined by Western immunoblot analysis. Rolipram protected against cell death and increased viability in MRC-5 fibroblasts after CSE exposure. Furthermore, rolipram protected against apoptosis, decreased caspase-3 and -8 cleavage in MRC-5 cells exposed to CSE. Pre-treatment with rolipram enhanced Akt phosphorylation and associated cytoprotection in CSE-treated cells, which could be reversed by the PI3K inhibitor LY294002 partly. In conclusion, rolipram protects against apoptosis of MRC-5 cells through inhibition of caspase-3 and caspase-8. Rolipram may represent an effective therapeutic agent to reduce cigarette smoke-induced apoptosis of lung fibroblasts.
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Affiliation(s)
- Jeong-Woong Park
- Department of Pulmonary and Critical Care Medicine, Gachon University, Gil Medical Center, 1198 Guwol Dong, Namdong-Gu, Incheon, Republic of Korea.
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Weber M, Lupp C, Stein P, Kreft A, Bopp T, Wehler TC, Schmitt E, Schild H, Radsak MP. Mechanisms of cyclic nucleotide phosphodiesterases in modulating T cell responses in murine graft-versus-host disease. PLoS One 2013; 8:e58110. [PMID: 23483980 PMCID: PMC3590136 DOI: 10.1371/journal.pone.0058110] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 01/30/2013] [Indexed: 01/07/2023] Open
Abstract
Graft-versus-host disease (GvHD) is a key contributor to the morbidity and mortality after allogeneic hematopoetic stem cell transplantation (HSCT). Regulatory Foxp3+ CD4+ T cells (Treg) suppress conventional T cell activation and can control GvHD. In our previous work, we demonstrate that a basic mechanism of Treg mediated suppression occurs by the transfer of cyclic adenosine monophosphate (cAMP) to responder cells. Whether this mechanism is relevant for Treg mediated suppression of GvHD is currently unknown. To address this question, bone marrow and T cells from C57BL/6 mice were transferred into lethally irradiated BALB/c recipients, and the course of GvHD and survival were monitored. Transplanted recipients developed severe GvHD that was strongly ameliorated by the transfer of donor Treg cells. Towards the underlying mechanisms, in vitro studies revealed that Treg communicated with DCs via gap junctions, resulting in functional inactivation of DC by a metabolic pathway involving cAMP that is modulated by the phosphodiesterase (PDE) 4 inhibitor rolipram. PDE2 or PDE3 inhibitors as well as rolipram suppressed allogeneic T cell activation, indirectly by enhancing Treg mediated suppression of DC activation and directly by inhibiting responder T cell proliferation. In line with this, we observed a cooperative suppression of GvHD upon Treg transfer and additional rolipram treatment. In conclusion, we propose that an important pathway of Treg mediated control of GvHD is based on a cAMP dependent mechanism. These data provide the basis for future concepts to manipulate allogeneic T cell responses to prevent GvHD.
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Affiliation(s)
- Michael Weber
- Institute for Immunology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Corinna Lupp
- Institute for Immunology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Pamela Stein
- Institute for Immunology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Andreas Kreft
- Institute of Pathology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Tobias Bopp
- Institute for Immunology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Thomas C. Wehler
- Institute of Pathology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Edgar Schmitt
- Institute for Immunology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Hansjörg Schild
- Institute for Immunology, Johannes Gutenberg-University Medical Center, Mainz, Germany
| | - Markus P. Radsak
- Department Internal of Medicine III, University Medical Center, Johannes Gutenberg-University, Mainz, Germany
- * E-mail:
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Atkins CM, Cepero ML, Kang Y, Liebl DJ, Dietrich WD. Effects of early rolipram treatment on histopathological outcome after controlled cortical impact injury in mice. Neurosci Lett 2012; 532:1-6. [PMID: 23103712 DOI: 10.1016/j.neulet.2012.10.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 10/12/2012] [Accepted: 10/16/2012] [Indexed: 11/19/2022]
Abstract
Traumatic brain injury (TBI) pathology includes contusions, cavitation, cell death, all of which can be exacerbated by inflammation. We hypothesized that an anti-inflammatory drug, rolipram, may reduce pathology after TBI, since in several CNS injury models rolipram reduces inflammation and improves cell survival and functional recovery. Adult male C57BL/6 mice received a craniotomy over the right parietotemporal cortex. Vertically directed controlled cortical impact (CCI) injury was delivered. Naïve controls were used for comparison. At 30 min post-surgery, animals were treated with vehicle or rolipram (1 mg/kg), and then once per day for 3 days. On day 3, the brains were systematically sectioned and stained to visualize the resulting pathology using hematoxylin and eosin (H&E) staining and NeuN immunocytochemistry. Total parietotemporal cortical contusion and cavity volume were significantly increased in rolipram-treated as compared to vehicle-treated CCI animals. Contusion areas at specific bregma levels indicated a significant effect of drug across bregma levels. Neuronal cell loss in the dentate hilus and area CA3 of the hippocampus were similar between vehicle and rolipram-treated animals. Although rolipram is well known to reduce pathology and inflammation in several other CNS injury models, the pathology resulting from CCI was worsened with rolipram at this particular dose and administration schedule. These studies suggest that consideration of the unique characteristics of TBI pathology is important in the extrapolation of promising therapeutic interventions from other CNS injury models.
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Affiliation(s)
- Coleen M Atkins
- The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL 33136-1060, USA.
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Schaal SM, Garg MS, Ghosh M, Lovera L, Lopez M, Patel M, Louro J, Patel S, Tuesta L, Chan WM, Pearse DD. The therapeutic profile of rolipram, PDE target and mechanism of action as a neuroprotectant following spinal cord injury. PLoS One 2012; 7:e43634. [PMID: 23028463 PMCID: PMC3446989 DOI: 10.1371/journal.pone.0043634] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Accepted: 07/24/2012] [Indexed: 01/08/2023] Open
Abstract
The extent of damage following spinal cord injury (SCI) can be reduced by various neuroprotective regimens that include maintaining levels of cyclic adenosine monophosphate (cyclic AMP), via administration of the phosphodiesterase 4 (PDE4) inhibitor Rolipram. The current study sought to determine the optimal neuroprotective dose, route and therapeutic window for Rolipram following contusive SCI in rat as well as its prominent PDE target and putative mechanism of protection. Rolipram or vehicle control (10% ethanol) was given subcutaneously (s.c.) daily for 2 wk post-injury (PI) after which the preservation of oligodendrocytes, neurons and central myelinated axons was stereologically assessed. Doses of 0.1 mg/kg to 1.0 mg/kg (given at 1 h PI) increased neuronal survival; 0.5 mg to 1.0 mg/kg protected oligodendrocytes and 1.0 mg/kg produced optimal preservation of central myelinated axons. Ethanol also demonstrated significant neuronal and oligo-protection; though the preservation provided was significantly less than Rolipram. Subsequent use of this optimal Rolipram dose, 1.0 mg/kg, via different routes (i.v., s.c. or oral, 1 h PI), demonstrated that i.v. administration produced the most significant and consistent cyto- and axo- protection, although all routes were effective. Examination of the therapeutic window for i.v. Rolipram (1.0 mg/kg), when initiated between 1 and 48 h after SCI, revealed maximal neuroprotection at 2 h post-SCI, although the protective efficacy of Rolipram could still be observed when administration was delayed for up to 48 h PI. Importantly, use of the optimal Rolipram regimen significantly improved locomotor function after SCI as measured by the BBB score. Lastly we show SCI-induced changes in PDE4A, B and D expression and phosphorylation as well as cytokine expression and immune cell infiltration. We demonstrate that Rolipram abrogates SCI-induced PDE4B1 and PDE4A5 production, PDE4A5 phosphorylation, MCP-1 expression and immune cell infiltration, while preventing post-injury reductions in IL-10. This work supports the use of Rolipram as an acute neuroprotectant following SCI and defines an optimal administration protocol and target for its therapeutic application.
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Affiliation(s)
- Sandra Marie Schaal
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
- The Neuroscience Program, University of Miami, Miami, Florida, United States of America
| | - Maneesh Sen Garg
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Mousumi Ghosh
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Lilie Lovera
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Michael Lopez
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Monal Patel
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Jack Louro
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Samik Patel
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Luis Tuesta
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Wai-Man Chan
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Damien Daniel Pearse
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States of America
- The Neuroscience Program, University of Miami, Miami, Florida, United States of America
- The Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
- The Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida, United States of America
- * E-mail:
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Paplińska-Goryca M, Chazan R, Grubek-Jaworska H. PDE4 inhibitors have no effect on eotaxin expression in human primary bronchial epithelial cells. Acta Biochim Pol 2012; 59:371-375. [PMID: 22946025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 07/27/2012] [Accepted: 08/24/2012] [Indexed: 06/01/2023]
Abstract
The bronchial epithelium is a very important factor during the inflammatory response, it produces many key regulators involved in the pathophysiology of asthma and COPD. Local influx of eosinophils, basophils, Th2 lymphocytes and macrophages is the source of many cytotoxic proteins, cytokines and other mediators of inflammation. These cells are attracted by eotaxins (eotaxin-1/CCL11, eotaxin-2/CCL24, eotaxin-3/CCL26). Inhibitors of phosphodiesterase 4 (PDE4) are new anti-inflammatory drugs which cause cAMP accumulation in the cell and inhibit numerous stages of allergic inflammation. The aim of our study was to evaluate the influence of PDE4 inhibitors: rolipram and RO-20-1724 on the expression of eotaxins in human primary bronchial epithelial cells. Cells were preincubated with PDE4 inhibitors for 1 hour and then stimulated with IL-4 or IL-13 alone or in combination with TNF-α. After 48 hours, eotaxin protein level was measured by ELISA and mRNA level by real time PCR. These cells produce CCL24 and CCL26. PDE4 inhibitors increased CCL24 and CCL26 mRNA level irrespectively of the used stimulators. Rolipram and RO-20-1724 had no effect on eotaxin protein production in our experimental conditions. Thus PDE4 inhibitors have no effect on eotaxin protein expression in human primary bronchial epithelial cells. In vitro experiments should be performed using a primary cell model rather than immortalized lines.
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Abstract
Electrophysiological recordings (using the slow-AHP potassium current) together with novel biosensor imaging methods (with AKAR and Epac sensors) were used in preparations of rodent brain slices to record PKA activation in real time and in individual neurons. The experiments revealed the propagation of the PKA signal from the membrane to the cytosol and eventually to the nucleus. The experiments show how the geometry of the neurons combined with phosphodiesterase activities (mostly rolipram-sensitive PDE4) contributes to a functional compartmentation of the cAMP in subcellular domains.
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Affiliation(s)
- P Vincent
- Centre National de la Recherche Scientifique, Unité Mixe de Recherche UMR7102, Paris, France.
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Zimmerman NP, Kumar SN, Turner JR, Dwinell MB. Cyclic AMP dysregulates intestinal epithelial cell restitution through PKA and RhoA. Inflamm Bowel Dis 2012; 18:1081-91. [PMID: 21993975 PMCID: PMC3258471 DOI: 10.1002/ibd.21898] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Accepted: 08/22/2011] [Indexed: 01/17/2023]
Abstract
BACKGROUND Mucosal homeostasis is dependent on the establishment and maintenance of the cell-cell contacts that comprise the physiological barrier. Breaks in the barrier are linked to multiple diseases such as inflammatory bowel disease. While increased cyclic adenosine monophosphate (cAMP) levels limit inflammation by decreasing leukocyte infiltration, the effects of elevated cAMP on intestinal epithelial repair are unknown. METHODS Restitution in animals administered rolipram was monitored by microscopic examination after laser wounding of the intestinal epithelium or in mice treated with dextran sodium sulfate (DSS). In vitro analysis was conducted using IEC6 and T84 cells to determine the role of elevated cAMP in altering Rho-dependent cellular migration signaling pathways. RESULTS We show that treatment with rolipram, forskolin, and cAMP analogs decrease intestinal epithelial cell migration in vitro. In vivo cell imaging revealed that increased cAMP resulted in a decreased cellular migration rate, with cells at the edge displaying the highest activity. As expected, elevated cAMP elicited increased protein kinase A (PKA) activity, in turn resulting in the inactivation and sequestration of RhoA and decreased actin reorganization. The ablation of restitution by cAMP was not restricted to cell culture, as forskolin and rolipram treatment significantly decreased epithelial microwound closure induced by the two photon confocal injury model. CONCLUSIONS Together, these data suggest that administration of cAMP-elevating agents paradoxically decrease infiltration of damage-causing leukocytes while also preventing epithelial repair and barrier maintenance. We propose that treatment with cAMP-elevating agents severely limits mucosal reepithelialization and should be contraindicated for use in chronic inflammatory bowel disorders.
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Affiliation(s)
- Noah P. Zimmerman
- Microbiology and Molecular Genetics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | - Suresh N. Kumar
- Department of Pathology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | | | - Michael B. Dwinell
- Microbiology and Molecular Genetics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226
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Kashiwagi E, Shiota M, Yokomizo A, Itsumi M, Inokuchi J, Uchiumi T, Naito S. Downregulation of phosphodiesterase 4B (PDE4B) activates protein kinase A and contributes to the progression of prostate cancer. Prostate 2012; 72:741-51. [PMID: 22529021 DOI: 10.1002/pros.21478] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 07/29/2011] [Indexed: 11/05/2022]
Abstract
BACKGROUND Prostate cancer is the most commonly diagnosed non-cutaneous cancer in American men. Unfortunately, few successful therapies for castration-resistant prostate cancer (CRPC) exist. The protein kinase A (PKA) pathway is a critical mediator of cellular proliferation and differentiation in various normal and cancerous cells. However, the PKA activity and the mechanism of regulation in CRPC remain unclear. Then, in this study, we intended to reveal the PKA activity and the mechanism of regulation in CRPC. METHODS Western blotting, quantitative real-time polymerase chain reaction, cytotoxicity analysis, and cell proliferation assay were used to resolve the regulatory role of PKA in prostate cancer cell line, LNCaP and their derivatives. RESULTS cAMP-specific phosphodiesterase 4B (PDE4B) was downregulated and the PKA pathway was activated in castration-resistant LNCaP derivatives (CxR cells). Rolipram activated the PKA pathway via inhibition of PDE4B, resulting in AR transactivation while the PKA inhibitor, H89 reduced AR transactivation. In response to hydrogen peroxide and in hydrogen peroxide-resistant LNCaP derivatives (HPR50 cells) PDE4B was decreased and as a result PKA activity was increased. Moreover, PDE4B expression was reduced in advanced prostate cancer and PDE4B knockdown promoted castration-resistant growth of LNCaP cells. CONCLUSIONS Oxidative stress may suppress PDE4B expression and activate the PKA pathway. The PDE4B/PKA pathway contributed to progression of androgen-dependent prostate cancer to CRPC. This pathway may represent an attractive therapeutic molecular target.
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Affiliation(s)
- Eiji Kashiwagi
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Wang L, Yang J, Guo L, Uyeminami D, Dong H, Hammock BD, Pinkerton KE. Use of a soluble epoxide hydrolase inhibitor in smoke-induced chronic obstructive pulmonary disease. Am J Respir Cell Mol Biol 2012; 46:614-22. [PMID: 22180869 PMCID: PMC3359909 DOI: 10.1165/rcmb.2011-0359oc] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 12/12/2011] [Indexed: 11/24/2022] Open
Abstract
Tobacco smoke-induced chronic obstructive pulmonary disease (COPD) is a prolonged inflammatory condition of the lungs characterized by progressive and largely irreversible airflow limitation attributable to a number of pathologic mechanisms, including bronchitis, bronchiolitis, emphysema, mucus plugging, pulmonary hypertension, and small-airway obstruction. Soluble epoxide hydrolase inhibitors (sEHIs) demonstrated anti-inflammatory properties in a rat model after acute exposure to tobacco smoke. We compared the efficacy of sEHI t-TUCB (trans-4-{4-[3-(4-trifluoromethoxy-phenyl)-ureido]-cyclohexyloxy}-benzoic acid) and the phosphodiesterase-4 (PDE4) inhibitor Rolipram (Biomol International, Enzo Life Sciences, Farmingdale, NY) to reduce lung injury and inflammation after subacute exposure to tobacco smoke over a period of 4 weeks. Pulmonary physiology, bronchoalveolar lavage, cytokine production, and histopathology were analyzed to determine the efficacy of sEHI and Rolipram to ameliorate tobacco smoke-induced inflammation and injury in the spontaneously hypertensive rat. Both t-TUCB and Rolipram inhibited neutrophil elevation in bronchoalveolar lavage. sEHI t-TUCB suppressed IFN-γ, while improving lung function by reducing tobacco smoke-induced total respiratory resistance and tissue damping (small-airway and peripheral tissue resistance). Increases in tobacco smoke-induced alveolar airspace size were attenuated by t-TUCB. Rolipram inhibited the production of airway mucus. Both t-TUCB and Rolipram inhibited vascular remodeling-related growth factor. These findings suggest that sEHI t-TUCB has therapeutic potential for treating COPD by improving lung function and attenuating the lung inflammation and emphysematous changes caused by tobacco smoke. To the best of our knowledge, this is the first report to demonstrate that sEHI exerts significant protective effects after repeated, subacute tobacco smoke-induced lung injury in a rat model of COPD.
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Affiliation(s)
- Lei Wang
- Center for Health and the Environment, and
| | - Jun Yang
- Department of Entomology and Cancer Center, University of California at Davis Medical Center, University of California at Davis, Davis, California
| | - Lei Guo
- Center for Health and the Environment, and
| | | | - Hua Dong
- Department of Entomology and Cancer Center, University of California at Davis Medical Center, University of California at Davis, Davis, California
| | - Bruce D. Hammock
- Department of Entomology and Cancer Center, University of California at Davis Medical Center, University of California at Davis, Davis, California
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Deng J, Wang DX, Deng W, Li CY, Tong J, Ma H. Regulation of alveolar fluid clearance and ENaC expression in lung by exogenous angiotensin II. Respir Physiol Neurobiol 2011; 181:53-61. [PMID: 22138610 DOI: 10.1016/j.resp.2011.11.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 11/17/2011] [Accepted: 11/18/2011] [Indexed: 01/11/2023]
Abstract
Angiotensin II (Ang II) has been demonstrated as a pro-inflammatory effect in acute lung injury, but studies of the effect of Ang II on the formation of pulmonary edema and alveolar filling remains unclear. Therefore, in this study the regulation of alveolar fluid clearance (AFC) and the expression of epithelial sodium channel (ENaC) by exogenous Ang II was verified. SD rats were anesthetized and were given Ang II with increasing doses (1, 10 and 100 μg/kg per min) via osmotic minipumps, whereas control rats received only saline vehicle. AT1 receptor antagonist ZD7155 (10 mg/kg) and inhibitor of cAMP degeneration rolipram (1 mg/kg) were injected intraperitoneally 30 min before administration of Ang II. The lungs were isolated for measurement of alveolar fluid clearance. The mRNA and protein expression of ENaC were detected by RT-PCR and Western blot. Exposure to higher doses of Ang II reduced AFC in a dose-dependent manner and resulted in a non-coordinate regulation of α-ENaC vs. the regulation of β- and γ-ENaC, however Ang II type 1 (AT1) receptor antagonist ZD7155 prevented the Ang II-induced inhibition of fluid clearance and dysregulation of ENaC expression. In addition, exposure to inhibitor of cAMP degradation rolipram blunted the Ang II-induced inhibition of fluid clearance. These results indicate that through activation of AT(1) receptor, exogenous Ang II promotes pulmonary edema and alveolar filling by inhibition of alveolar fluid clearance via downregulation of cAMP level and dysregulation of ENaC expression.
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Affiliation(s)
- Jia Deng
- Department of Respiratory Medicine, Second Affiliated of Chongqing Medical University, Chongqing, China
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Hu W, Lu T, Chen A, Huang Y, Hansen R, Chandler LJ, Zhang HT. Inhibition of phosphodiesterase-4 decreases ethanol intake in mice. Psychopharmacology (Berl) 2011; 218:331-9. [PMID: 21509503 PMCID: PMC4210373 DOI: 10.1007/s00213-011-2290-8] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2010] [Accepted: 03/29/2011] [Indexed: 01/29/2023]
Abstract
RATIONALE Cyclic AMP (cAMP)-protein kinase A signaling has been implicated in the regulation of ethanol consumption. Phosphodiesterase-4 (PDE4) specifically hydrolyzes cAMP and plays a critical role in controlling intracellular cAMP levels in the brain. However, the role of PDE4 in ethanol consumption remains unknown. OBJECTIVE The objective of this study is to examine whether PDE4 was involved in regulating ethanol intake. METHODS The two-bottle choice paradigm was used to assess intake of ethanol, sucrose, and quinine in C57BL/6J mice treated with the selective PDE4 inhibitor rolipram or Ro 20-1724; locomotor activity was also monitored using the open-field test in mice treated with rolipram. RESULTS Administration (i.p.) of either rolipram (0.25 and 0.5 mg/kg) or Ro 20-1724 (10 mg/kg) reduced ethanol intake and preference by 60-80%, but did not alter total fluid intake. In contrast, rolipram even at the higher dose of 0.5 mg/kg was not able to affect intake of sucrose or quinine, alcohol-induced sedation, or blood ethanol elimination. At 0.5 mg/kg, rolipram did decrease locomotor activity, but the effect only lasted for approximately 40 min, which did not likely affect behavior of ethanol drinking. CONCLUSIONS These results suggest that PDE4 is a novel target for drugs that reduce ethanol intake; PDE4 inhibitors may be used for treatment of alcohol dependence.
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Affiliation(s)
- Wei Hu
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University Health Sciences Center, Morgantown, WV26506, USA
| | - Tina Lu
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University Health Sciences Center, Morgantown, WV26506, USA
| | - Alan Chen
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University Health Sciences Center, Morgantown, WV26506, USA
| | - Ying Huang
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University Health Sciences Center, Morgantown, WV26506, USA
| | - Rolf Hansen
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University Health Sciences Center, Morgantown, WV26506, USA
| | - L. Judson Chandler
- Department of Neurosciences and Center for Drug and Alcohol Programs, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Han-Ting Zhang
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University Health Sciences Center, Morgantown, WV26506, USA
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Paplinska M, Chazan R, Grubek-Jaworska H. Effect of phoshpodiesterase 4 (PDE4) inhibibtors on eotaxin expression in humen bronchial epithelial cells. J Physiol Pharmacol 2011; 62:303-311. [PMID: 21893690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Accepted: 06/10/2011] [Indexed: 05/31/2023]
Abstract
UNLABELLED The increasing number of eosinophils into bronchoaelvolar space is observed during noninfectious inflammatory lung diseases. Eotaxins (eotaxin-1/CCL11, eotaxin-2/CCL24, eotaxin-3/CCL26) are the strongest chemotactic agents for eosinophils. Inhibitors of phosphodiesterase 4 (PDE4), the enzyme decomposing cAMP, are anti-inflammatory agents which act through cAMP elevation and inhibit numerous steps of allergic inflammation. The effect of PDE4 inhibitors on eotaxin expression is not known in details. The aim of our study was to evaluate the influence of PDE4 inhibitors: rolipram and RO-20-1724 on expression of eotaxins in bronchial epithelial cell line BEAS-2B. Cells were preincubated with PDE4 inhibitors or dexamethasone for 1 hour and then stimulated with IL-4 or IL-13 alone or in combination with TNF-α. After 48 hours eotaxin protein level was measured by ELISA and mRNA level by real time PCR. RESULTS PDE4 inhibitors decreased CCL11 and CCL26 expression only in cultures co-stimulated with TNF-α. In cultures stimulated with IL-4 and TNF-α rolipram and RO-20-1724 diminished CCL11 mRNA expression by 34 and 37%, respectively, and CCL26 by 43 and 47%. In cultures stimulated with IL-13 and TNF-α rolipram and RO-20-1724 decreased expression of both eotaxins by about 50%. These results were confirmed at the protein level. The effect of PDE4 inhibitors on eotaxin expression in BEAS-2B cells, in our experimental conditions, depends on TNF-α contribution.
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Affiliation(s)
- M Paplinska
- Department of Internal Diseases, Pneumonology and Allergology Medical University of Warsaw, Warsaw, Poland.
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Ohanna M, Bertolotto C, Ballotti R. Fitting MITF regulation of PDE4D3 into the skin pigmentation puzzle. Pigment Cell Melanoma Res 2011; 24:4-6. [PMID: 21040501 DOI: 10.1111/j.1755-148x.2010.00795.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Smith KR, Leonard D, McDonald JD, Tesfaigzi Y. Inflammation, mucous cell metaplasia, and Bcl-2 expression in response to inhaled lipopolysaccharide aerosol and effect of rolipram. Toxicol Appl Pharmacol 2011; 253:253-60. [PMID: 21504754 DOI: 10.1016/j.taap.2011.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 02/16/2011] [Accepted: 04/01/2011] [Indexed: 11/19/2022]
Abstract
Our previous studies have characterized the inflammatory response of intratracheally instilled lipopolysaccharides (LPS) in F344/N rats. To better reflect the environmentally relevant form of LPS exposure, the present study evaluated the inflammatory response of F344/N rats exposed to LPS by inhalation. Rats were exposed by nose-only inhalation to aerosolized LPS at a median particle diameter of 1 μm and a dose range from 0.08 to 480 μg. Animals were euthanized 72 h post exposure and the inflammatory cell counts and differentials, the cytokine/chemokine levels in the bronchoalveolar lavage fluid (BALF), and the changes in intraepithelial stored mucosubstances, mucous cells per mm basal lamina, and Bcl-2-positive mucous cells were quantified. We observed a dose-dependent increase reaching maximum values at the 75 μg LPS dose for the numbers of neutrophils, macrophages and lymphocytes, for the levels of IL-6, IL-1α, IL-1β, TNFα, MCP-1 and GRO-KC. In addition, mucous cell metaplasia and the percentage of Bcl-2-positive mucous cells were increased with an increasing deposited LPS dose. When rats were treated with the phosphodiesterase-4 (PDE4) inhibitor, rolipram (10mg/kg), prior to exposure to aerosolized LPS neutrophil numbers in the BAL were reduced at 8h but not at 24 or 72 h post LPS exposure. These results demonstrate that exposure to aerosolized LPS resulted in a more potent inflammatory response at lower doses and that inflammation was more uniformly distributed throughout the lung compared to inflammation caused by intratracheal LPS instillation. Therefore, this animal model will be useful for screening efficacy of anti-inflammatory drugs.
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Affiliation(s)
- Kevin R Smith
- COPD Program, Lovelace Respiratory Research Institute, Albuquerque, NM 87108, USA
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