1
|
Wang W, Xue Y, Li D, Shao C, Wu K, Sun N, Chen Q. Forskolin is an effective therapeutic small molecule for the treatment of hypertrophic cardiomyopathy through ADCY6/cAMP/PKA pathway. Eur J Pharmacol 2024; 978:176770. [PMID: 38925286 DOI: 10.1016/j.ejphar.2024.176770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 06/18/2024] [Accepted: 06/23/2024] [Indexed: 06/28/2024]
Abstract
Hypertrophic cardiomyopathy (HCM) arises from a pathogenic variant in the gene responsible for encoding the myocardium-associated protein. Forskolin (FSK), a labdane diterpene isolated from Sphingomonas capillaris, exhibits diverse pharmacological effects, including bronchospasm relief, intraocular pressure reduction, and glaucoma treatment. However, whether FSK could regulate HCM and its associated mechanism remains unclear. Here, we discovered that FSK could mitigate cardiac hypertrophy in two HCM mouse models (Myh6R404Q and Tnnt2R109Q) in vivo. Additionally, FSK could prevent norepinephrine (NE)-induced cardiomyocyte hypertrophy in vitro. It reversed cardiac dysfunction, reduced enlarged cell size, and downregulated the expression of hypertrophy-related genes. We further demonstrated that FSK's mechanism in alleviating HCM relied on the activation of ADCY6. In conclusion, our findings demonstrate that FSK alleviates hypertrophic cardiomyopathy by modulating the ADCY6/cAMP/PKA pathway, suggesting that FSK holds promise as a therapeutic agent for HCM.
Collapse
Affiliation(s)
- Wenyan Wang
- Wuxi School of Medicine, Jiangnan University, JiangSu, China
| | - Yingying Xue
- Wuxi School of Medicine, Jiangnan University, JiangSu, China
| | - Dujuan Li
- Wuxi School of Medicine, Jiangnan University, JiangSu, China
| | - Chenwen Shao
- Wuxi School of Medicine, Jiangnan University, JiangSu, China
| | - Kejia Wu
- Wuxi School of Medicine, Jiangnan University, JiangSu, China
| | - Ning Sun
- Wuxi School of Medicine, Jiangnan University, JiangSu, China
| | - Qi Chen
- Wuxi School of Medicine, Jiangnan University, JiangSu, China.
| |
Collapse
|
2
|
Wang Q, Su X, Zhu R, Zhao RC. cAMP Agonist Forskolin Disrupts Mitochondrial Metabolism and Induces Senescence in Human Mesenchymal Cells. Stem Cells Dev 2023; 32:87-98. [PMID: 36503249 DOI: 10.1089/scd.2022.0180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Adult-derived mesenchymal stem cells (MSCs) can be used in therapies for the treatment of various diseases. The MSCs derived from aging tissues or long-term MSC cultures could have diminished therapeutic effects compared with MSCs derived from younger tissues, but the underlying mechanism has not been completely established. Dysfunction of energy metabolism is one of the main mechanisms underlying cell senescence. Although cyclic adenosine monophosphate (cAMP) is known to inhibit cell division and proliferation in vitro, its impact on MSC senescence has not been described. In this study, we used forskolin, an adenylate cyclase agonist and cAMP inducer, to disrupt metabolism in human adipose-derived MSCs and investigate the effects of metabolic dysfunction on MSC senescence. Treatment of human MSCs with forskolin resulted in senescence phenotypes, including reduced proliferation, cell-cycle arrest, and enhanced expression of the cell aging markers p16 and p21. Further, the senescent MSCs exhibited increased adipogenesis capacity and decreased osteogenesis capacity as well as a senescence-associated secretory phenotype characterized by increased expression of several inflammatory factors. Forskolin-associated MSC senescence was mainly caused by oxidative stress-induced disruption of mitochondrial metabolism, and the senescent MSCs had high levels of reactive oxygen species and reduced sirtuin gene expression. Lastly, we found that cAMP inhibitor SQ22536 protects MSCs from forskolin-induced senescence and senescence-related inflammatory phenotype. Our results indicate that forskolin can cause senescence of human MSCs through oxidative stress-induced mitochondrial metabolic dysfunction, and thus the results provide a basis for developing strategies for improving the quality and efficacy of cultured MSCs for clinical use.
Collapse
Affiliation(s)
- Qiaoling Wang
- Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Center for Excellence in Tissue Engineering, Chinese Academy of Medical Sciences; Beijing Key Laboratory of New Drug Development and Clinical Trial of Stem Cell Therapy (BZ0381), Beijing, People's Republic of China
| | - Xiaodong Su
- Brain Tumor Research Center, Beijing Neurosurgical Institute, Beijing Tiantan Hospital Affiliated to Capital Medical University, Beijing Laboratory of Biomedical Materials, Beijing, People's Republic of China
| | - Rongjia Zhu
- Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Center for Excellence in Tissue Engineering, Chinese Academy of Medical Sciences; Beijing Key Laboratory of New Drug Development and Clinical Trial of Stem Cell Therapy (BZ0381), Beijing, People's Republic of China
| | - Robert Chunhua Zhao
- Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Center for Excellence in Tissue Engineering, Chinese Academy of Medical Sciences; Beijing Key Laboratory of New Drug Development and Clinical Trial of Stem Cell Therapy (BZ0381), Beijing, People's Republic of China.,School of Life Sciences, Shanghai University, Shanghai, People's Republic of China
| |
Collapse
|
3
|
Bioactive Properties of Extracts from Plectranthus barbatus ( Coleus forskohlii) Roots Received Using Various Extraction Methods. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248986. [PMID: 36558119 PMCID: PMC9781142 DOI: 10.3390/molecules27248986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
The aim of this study was to verify various extraction methods: shaking water bath extraction (SWA), ultrasound-assisted extraction (UAE) and microwave assisted extraction (MAE), and their parameters to optimize the extraction yield as well as maximize the concentration of polyphenols in Plectranthus barbatus extracts. Extracts were obtained from dried roots of P. barbatus in various degrees of fragmentation and analyzed for content of polyphenols, antioxidant capacity and flavonoids. Additionally, phenolic compounds in extracts were analyzed using the UHPLC-DAD-ESI-MS/MS method. The conducted research showed that roots of P. barbatus are rich in polyphenolic compounds. A total of 15 phenolic compounds, belonging to the group of phenolic acids and their derivatives, were identified. The extraction yield was similar for all extraction methods and averaged 31%. Irrespective of the extraction method, the yield was the lowest in the case of using 80% ethanol as the solvent. The extracts obtained from the finer fraction were characterized by a higher antioxidant capacity as well as a higher concentration of polyphenolic compounds including flavonoids. UAE seems to be the most effective method for extraction of polyphenols from P. barbatus roots. Regardless of the extraction method, ethanol was a better extractant than distilled water. All ethanolic extracts were characterized by a high antioxidant capacity. The 80% ethanol solution was considered the best solvent for the extraction of flavonoids, while the 40% and 60% ethanol solutions were sufficient for the effective extraction of polyphenolic compounds in general.
Collapse
|
4
|
An X, Wang R, Chen E, Yang Y, Fan B, Li Y, Han B, Li Q, Liu Z, Han Y, Chen J, Zha D. A forskolin-loaded nanodelivery system prevents noise-induced hearing loss. J Control Release 2022; 348:148-157. [PMID: 35659555 DOI: 10.1016/j.jconrel.2022.05.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 05/23/2022] [Accepted: 05/28/2022] [Indexed: 10/18/2022]
Abstract
Hearing loss is the most common sensory disorder worldwide and may result from age, drugs, or exposure to excessive noise. Crossing the blood-labyrinth barrier to achieve targeted drug delivery to the inner ear is key to the treatment of hearing loss. We designed a nanoparticle (NP)-based system for targeted drug delivery of forskolin (FSK) to the inner ear, driven by the prestin-targeting peptide LS19 ("ligand-receptor type interaction"). In vivo experiments in developing zebrafish embryos (4-96 h past fertilization) and mice confirmed that LS19-FSK specifically targeted and accumulated in zebrafish lateral line neuromasts and mouse outer hair cells (OHCs). LS19 peptide modification enabled LS19-FSK-NPs to rapidly target OHCs with high specificity. Furthermore, the multifunctional LS19-FSK-NPs were successfully delivered to the OHCs via the round window membrane route and exhibited slow-release properties. The sustained release and intracellular accumulation of FSK inhibited apoptosis of OHCs. Compared with LS19-NPs and FSK-NPs, LS19-FSK-NPs provided significantly stronger protection against noise-induced hearing damage, based on auditory brainstem responses at 4, 8, 16, and 32 kHz. Thus, our specially designed targeted nano-delivery system may serve as a basis for future clinical applications and treatment platforms and has the potential to significantly improve the treatment results of many inner ear diseases.
Collapse
Affiliation(s)
- Xiaogang An
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Renfeng Wang
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Erfang Chen
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yang Yang
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Bei Fan
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yao Li
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Bang Han
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Qiong Li
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Zhenzhen Liu
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yu Han
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Jun Chen
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China.
| | - Dingjun Zha
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China.
| |
Collapse
|
5
|
Thapa K, Grewal AS, Kanojia N, Rani L, Sharma N, Singh S. Alcoholic and Non-Alcoholic Liver Diseases: Promising Molecular Drug Targets and their Clinical Development. Curr Drug Discov Technol 2021; 18:333-353. [PMID: 31965945 DOI: 10.2174/1570163817666200121143959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/25/2019] [Accepted: 12/04/2019] [Indexed: 11/22/2022]
Abstract
Alcoholic and non-alcoholic fatty liver diseases have become a serious concern worldwide. Both these liver diseases have an identical pathology, starting from simple steatosis to cirrhosis and, ultimately to hepatocellular carcinoma. Treatment options for alcoholic liver disease (ALD) are still the same as they were 50 years ago which include corticosteroids, pentoxifylline, antioxidants, nutritional support and abstinence; and for non-alcoholic fatty liver disease (NAFLD), weight loss, insulin sensitizers, lipid-lowering agents and anti-oxidants are the only treatment options. Despite broad research in understanding the disease pathophysiology, limited treatments are available for clinical use. Some therapeutic strategies based on targeting a specific molecule have been developed to lessen the consequences of disease and are under clinical investigation. Therefore, focus on multiple molecular targets will help develop an efficient therapeutic strategy. This review comprises a brief overview of the pathogenesis of ALD and NAFLD; recent molecular drug targets explored for ALD and NAFLD that may prove to be effective for multiple therapeutic regimens and also the clinical status of these promising drug targets for liver diseases.
Collapse
Affiliation(s)
- Komal Thapa
- Chitkara University School of Basic Sciences, Chitkara University, Himachal Pradesh, India
| | - Ajmer Singh Grewal
- Chitkara University School of Basic Sciences, Chitkara University, Himachal Pradesh, India
| | - Neha Kanojia
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Lata Rani
- Chitkara University School of Basic Sciences, Chitkara University, Himachal Pradesh, India
| | - Neelam Sharma
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| |
Collapse
|
6
|
In vitro and in silico studies of 8(17),12E,14-labdatrien-18-oic acid in airways smooth muscle relaxation: new molecular insights about its mechanism of action. Naunyn Schmiedebergs Arch Pharmacol 2020; 394:885-902. [PMID: 33205250 DOI: 10.1007/s00210-020-02010-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 10/26/2020] [Indexed: 10/23/2022]
Abstract
In the field of experimental pharmacology, researchers continuously investigate new relaxant agents of the airway smooth muscle cells (ASMCs), since the pathophysiology of respiratory illnesses, such as asthma, involves hyperresponsiveness and changes in ASMC homeostasis. In this scenario, labdane-type diterpenes, like forskolin (FSK), are a class of compounds known for their relaxing action on smooth muscle cells (SMCs), being this phenomenon related to the direct activation of AC-cAMP-PKA pathway. Considering the continuous effort of our group to study the mechanism of action and prospecting for compounds isolated from natural sources, in this paper, we presented how the diterpene 8(17),12E,14-labdatrien-18-oic acid (LBD) promotes relaxant effect on ASMC, performing in vitro experiments using isolated guinea pig trachea and in silico molecular docking/dynamics simulations. In vitro experiments showed that in the presence of aminophylline, FSK and LBD had their relaxant effect potentiated (EC50 from 1.4 ± 0.2 × 10-5 M to 1.5 ± 0.3 × 10-6 M for LBD and from 2.0 ± 0.2 × 10-7 M to 6.4 ± 0.4 × 10-8 M for FSK) while in the presence of Rp-cAMPS this effect was attenuated (EC50 from 1.4 ± 0.2 × 10-5 M to 3 × 10-4 M for LBD and from 2.0 ± 0.2 × 10-7 to 3.1 ± 1.0 × 10-6 M for FSK). Additionally, in silico simulations evidenced that the lipophilic character of LBD is probably responsible for its stability on AC binding site. LBD presented two preferential orientations, where the double bonds of the isoprene moiety as well as the unique polar group (carboxylic acid) in this compound form important anchoring points. In this sense, we consider that the LBD can interact stabilizing the catalytic dimmer of AC as the FSK, although less efficiently.
Collapse
|
7
|
Wu F, Xiong H, Sha S. Noise-induced loss of sensory hair cells is mediated by ROS/AMPKα pathway. Redox Biol 2019; 29:101406. [PMID: 31926629 PMCID: PMC6933152 DOI: 10.1016/j.redox.2019.101406] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/25/2019] [Accepted: 12/09/2019] [Indexed: 12/25/2022] Open
Abstract
The formation of reactive oxygen species (ROS) is a well-documented process in noise-induced hearing loss (NIHL). We have also previously shown that activation of 5' adenosine monophosphate (AMP)-activated protein kinase (AMPKα) at its catalytic residue T172 is one of the key reactions triggering noise-induced outer hair cell (OHC) death. In this study, we are addressing the link between ROS formation and activation of AMPKα in OHCs after noise exposure. In-vivo treatment of CBA/J mice with the antioxidant N-acetyl cysteine (NAC) reduced noise-induced ROS formation (as assessed by the relative levels of 4-hydroxynonenal and 3-nitrotyrosine) and activation of AMPKα in OHCs. Forskolin, an activator of adenylyl cyclase (AC) and an antioxidant, significantly increased cyclic adenosine monophosphate (cAMP) and decreased ROS formation and noise-induced activation of AMPKα. Consequently, treatment with forskolin attenuated noise-induced losses of OHCs and NIHL. In HEI-OC1 cells, H2O2-induced activation of AMPKα and cell death were inhibited by the application of forskolin. The sum of our data indicates that noise activates AMPKα in OHCs through formation of ROS and that noise-exposure-induced OHC death is mediated by a ROS/AMPKα-dependent pathway. Forskolin may serve as a potential compound for prevention of NIHL.
Collapse
Affiliation(s)
- Fan Wu
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, 29425, USA; Department of Otolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hao Xiong
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, 29425, USA; Department of Otolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Suhua Sha
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, 29425, USA.
| |
Collapse
|
8
|
The Therapeutic Potential of the Labdane Diterpenoid Forskolin. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9194089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Forskolin is mainly found in the root of a plant called Coleus forskohlii (Willd.) Briq., which has been used in the traditional medicine of Indian Ayurvedic and Southeast Asia since ancient times. Forskolin is responsible for the pharmacological activity of this species. Forskolin is a labdane diterpenoid with a wide biological effect. Several studies suggested a positive role of forskolin on heart complications, respiratory disorders, high blood pressure, obesity, and asthma. There are numerous clinical and pre-clinical studies representing the effect of forskolin on the above-mentioned disorders but more clinical studies need to be performed to support its efficacy.
Collapse
|
9
|
Wang H, Lou C, Ma N. Forskolin exerts anticancer roles in non-Hodgkin's lymphomas via regulating Axin/β-catenin signaling pathway. Cancer Manag Res 2019; 11:1685-1696. [PMID: 30863177 PMCID: PMC6388987 DOI: 10.2147/cmar.s180754] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background Non-Hodgkin’s lymphomas (NHLs) account for 85% of lymphomas, which are characterized by high-degree malignancy, rapid progress, and even invasion into central nervous system in pediatric patients. Although the cure rate of pediatric NHL has improved, some patients have still underwent recurrence or death. This study focuses on the effects and mechanism of forskolin on the progression of NHL, aiming to find efficient therapy methods for pediatric NHL. Methods MTT, flow cytometry and mice tumor bearing experiments were used to evaluate the effects of forskolin on NHL cell proliferation, apoptosis and tumorigenesis. Western blotting and RT-PCR assays were used to detect protein and mRNA expression. Immunohistochemistry technology was recruited to analyze Ki-67 expression in tumor tissues. Results Forskolin significantly increased the expression of cleaved caspase-3/9 in both NHL Toledo and NK-92 cell lines, and inhibited cell growth. Besides, forskolin obviously reduced the expression of β-catenin protein, promoted its ubiquitination, enhanced its transportation from nuclear to cytoplasm, as well as decreased the expression of its downstream oncogenes c-myc and cyclin D1 through upregulating Axin expression and stability and inhibiting Axin ubiquitination. Moreover, forskolin enhanced the effects of SP600125, an inhibitor of c-Jun N-terminal kinase signaling on cell apoptosis promotion and tumorigenesis inhibition via Axin-induced β-catenin signaling repression. Conclusion The current study clarifies that forskolin can inhibit the progression of NHL through Axin-mediated inhibition of β-catenin signaling. Moreover, forskolin improves the effects of SP600125 on cell apoptosis enhancement and tumorigenesis inhibition of NHL cells. These findings provide theoretical foundation of serving forskolin as a new effective therapeutic drug for pediatric NHL.
Collapse
Affiliation(s)
- Hailei Wang
- Department of Pediatrics, Huaihe Hospital of Henan University, Kaifeng, Henan, China
| | - Chunyan Lou
- Department of Pediatrics, Huaihe Hospital of Henan University, Kaifeng, Henan, China
| | - Na Ma
- Department of Neurology, Henan Kaifeng Children's Hospital, Kaifeng, Henan, China,
| |
Collapse
|
10
|
McMacken G, Cox D, Roos A, Müller J, Whittaker R, Lochmüller H. The beta-adrenergic agonist salbutamol modulates neuromuscular junction formation in zebrafish models of human myasthenic syndromes. Hum Mol Genet 2019; 27:1556-1564. [PMID: 29462491 PMCID: PMC5905648 DOI: 10.1093/hmg/ddy062] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 02/14/2018] [Indexed: 11/15/2022] Open
Abstract
Inherited defects of the neuromuscular junction (NMJ) comprise an increasingly diverse range of disorders, termed congenital myasthenic syndromes (CMS). Therapies acting on the sympathetic nervous system, including the selective β2 adrenergic agonist salbutamol and the α and β adrenergic agonist ephedrine, have become standard treatment for several types of CMS. However, the mechanism of the therapeutic effect of sympathomimetics in these disorders is not understood. Here, we examined the effect of salbutamol on NMJ development using zebrafish with deficiency of the key postsynaptic proteins Dok-7 and MuSK. Treatment with salbutamol reduced motility defects in zebrafish embryos and larvae. In addition, salbutamol lead to morphological improvement of postsynaptic acetycholine receptor (AChR) clustering and size of synaptic contacts in Dok-7-deficient zebrafish. In MuSK-deficient zebrafish, salbutamol treatment reduced motor axon pathfinding defects and partially restored the formation of aneural prepatterned AChRs. In addition, the effects of salbutamol treatment were prevented by pre-treatment with a selective β2 antagonist. Treatment with the cyclic adenosine monophosphate (cAMP) activator forskolin, replicated the effects of salbutamol treatment. These results suggest that sympathomimetics exert a direct effect on neuromuscular synaptogenesis and do so via β2 adrenoceptors and via a cAMP-dependent pathway.
Collapse
Affiliation(s)
- Grace McMacken
- Institute of Genetic Medicine, The John Walton Muscular Dystrophy Research Centre, Newcastle University, International Centre for Life, Newcastle Upon Tyne NE1 3BZ, UK
| | - Dan Cox
- Institute of Genetic Medicine, The John Walton Muscular Dystrophy Research Centre, Newcastle University, International Centre for Life, Newcastle Upon Tyne NE1 3BZ, UK
| | - Andreas Roos
- Institute of Genetic Medicine, The John Walton Muscular Dystrophy Research Centre, Newcastle University, International Centre for Life, Newcastle Upon Tyne NE1 3BZ, UK.,Tissue Omics Project Group, Biomedical Research Department, Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., 44227 Dortmund, Germany
| | - Juliane Müller
- Institute of Genetic Medicine, Wellcome Trust Centre for Mitochondrial Research, Newcastle University, International Centre for Life, Newcastle Upon Tyne NE1 3BZ, UK
| | - Roger Whittaker
- Institute of Neuroscience, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
| | - Hanns Lochmüller
- Institute of Genetic Medicine, The John Walton Muscular Dystrophy Research Centre, Newcastle University, International Centre for Life, Newcastle Upon Tyne NE1 3BZ, UK
| |
Collapse
|
11
|
Wahlang B, McClain C, Barve S, Gobejishvili L. Role of cAMP and phosphodiesterase signaling in liver health and disease. Cell Signal 2018; 49:105-115. [PMID: 29902522 PMCID: PMC6445381 DOI: 10.1016/j.cellsig.2018.06.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 06/08/2018] [Accepted: 06/09/2018] [Indexed: 02/06/2023]
Abstract
Liver disease is a significant health problem worldwide with mortality reaching around 2 million deaths a year. Non-alcoholic fatty liver disease (NAFLD) and alcoholic liver disease (ALD) are the major causes of chronic liver disease. Pathologically, NAFLD and ALD share similar patterns of hepatic disorders ranging from simple steatosis to steatohepatitis, fibrosis and cirrhosis. It is becoming increasingly important to identify new pharmacological targets, given that there is no FDA-approved therapy yet for either NAFLD or ALD. Since the evolution of liver diseases is a multifactorial process, several mechanisms involving parenchymal and non-parenchymal hepatic cells contribute to the initiation and progression of liver pathologies. Moreover, certain protective molecular pathways become repressed during liver injury including signaling pathways such as the cyclic adenosine monophosphate (cAMP) pathway. cAMP, a key second messenger molecule, regulates various cellular functions including lipid metabolism, inflammation, cell differentiation and injury by affecting gene/protein expression and function. This review addresses the current understanding of the role of cAMP metabolism and consequent cAMP signaling pathway(s) in the context of liver health and disease. The cAMP pathway is extremely sophisticated and complex with specific cellular functions dictated by numerous factors such abundance, localization and degradation by phosphodiesterases (PDEs). Furthermore, because of the distinct yet divergent roles of both of its effector molecules, the cAMP pathway is extensively targeted in liver injury to modify its role from physiological to therapeutic, depending on the hepatic condition. This review also examines the behavior of the cAMP-dependent pathway in NAFLD, ALD and in other liver diseases and focuses on PDE inhibition as an excellent therapeutic target in these conditions.
Collapse
Affiliation(s)
- Banrida Wahlang
- University of Louisville Alcohol Research Center, School of Medicine, University of Louisville, KY, USA; Department of Medicine, School of Medicine, University of Louisville, KY, USA
| | - Craig McClain
- University of Louisville Alcohol Research Center, School of Medicine, University of Louisville, KY, USA; Department of Medicine, School of Medicine, University of Louisville, KY, USA; Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, KY, USA; Hepatobiology & Toxicology Center, School of Medicine, University of Louisville, KY, USA; Robley Rex Louisville VAMC, Louisville, KY, USA
| | - Shirish Barve
- University of Louisville Alcohol Research Center, School of Medicine, University of Louisville, KY, USA; Department of Medicine, School of Medicine, University of Louisville, KY, USA; Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, KY, USA; Hepatobiology & Toxicology Center, School of Medicine, University of Louisville, KY, USA
| | - Leila Gobejishvili
- University of Louisville Alcohol Research Center, School of Medicine, University of Louisville, KY, USA; Department of Medicine, School of Medicine, University of Louisville, KY, USA; Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, KY, USA; Hepatobiology & Toxicology Center, School of Medicine, University of Louisville, KY, USA.
| |
Collapse
|
12
|
Guo X, Bai X, Li L, Li J, Wang H. Forskolin protects against cisplatin-induced ototoxicity by inhibiting apoptosis and ROS production. Biomed Pharmacother 2018; 99:530-536. [PMID: 29665656 DOI: 10.1016/j.biopha.2018.01.080] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/26/2017] [Accepted: 01/12/2018] [Indexed: 11/29/2022] Open
Abstract
Cisplatin is widely used in the treatment of various types of cancer. However, it could cause severe side effects such as ototoxicity, which greatly limit the clinical application of cisplatin. Forskolin (FSK) is a diterpene derived from the plant Coleus forskohlii, and has been proven an effective drug for cardiovascular disease, diabetes, and asthma because of its anti-oxidant and anti-inflammatory action. Here, we investigated the effects of FSK in cisplatin-induced ototoxicity, and we found that FSK could significantly protect against cisplatin-induced ototoxicity in both cell line and isolated mouse cochlear. Pretreatment of FSK attenuated cisplatin-induced hearing loss especially at high frequency regions. FSK inhibited the activation of mitochondrial apoptotic pathway as well as reactive oxygen species (ROS) production. Moreover, we identified PKA and MAPK signaling pathway which may be connected with the protective effect of FSK. Our study provided the first evidence that FSK may be used as a drug to weaken the ototoxicity induced by cisplatin.
Collapse
Affiliation(s)
- Xiangrui Guo
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, PR China; Shandong Provincial Key Laboratory of Otology, Jinan, 250022, PR China
| | - Xiaohui Bai
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, PR China; Shandong Provincial Key Laboratory of Otology, Jinan, 250022, PR China
| | - Li Li
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, PR China
| | - Jianfeng Li
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, PR China; Shandong Provincial Key Laboratory of Otology, Jinan, 250022, PR China
| | - Haibo Wang
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, PR China; Shandong Provincial Key Laboratory of Otology, Jinan, 250022, PR China.
| |
Collapse
|
13
|
Mark JD. Asthma. Integr Med (Encinitas) 2018. [DOI: 10.1016/b978-0-323-35868-2.00029-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
14
|
Tran QT, Wong WF, Chai CL. Labdane diterpenoids as potential anti-inflammatory agents. Pharmacol Res 2017; 124:43-63. [DOI: 10.1016/j.phrs.2017.07.019] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/21/2017] [Accepted: 07/21/2017] [Indexed: 01/20/2023]
|
15
|
Rezaee F, Harford TJ, Linfield DT, Altawallbeh G, Midura RJ, Ivanov AI, Piedimonte G. cAMP-dependent activation of protein kinase A attenuates respiratory syncytial virus-induced human airway epithelial barrier disruption. PLoS One 2017; 12:e0181876. [PMID: 28759570 PMCID: PMC5536269 DOI: 10.1371/journal.pone.0181876] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 07/07/2017] [Indexed: 12/24/2022] Open
Abstract
Airway epithelium forms a barrier to the outside world and has a crucial role in susceptibility to viral infections. Cyclic adenosine monophosphate (cAMP) is an important second messenger acting via two intracellular signaling molecules: protein kinase A (PKA) and the guanidine nucleotide exchange factor, Epac. We sought to investigate effects of increased cAMP level on the disruption of model airway epithelial barrier caused by RSV infection and the molecular mechanisms underlying cAMP actions. Human bronchial epithelial cells were infected with RSV-A2 and treated with either cAMP releasing agent, forskolin, or cAMP analogs. Structure and functions of the Apical Junctional Complex (AJC) were evaluated by measuring transepithelial electrical resistance and permeability to FITC-dextran, and determining localization of AJC proteins by confocal microscopy. Increased intracellular cAMP level significantly attenuated RSV-induced disassembly of AJC. These barrier-protective effects of cAMP were due to the activation of PKA signaling and did not involve Epac activity. Increased cAMP level reduced RSV-induced reorganization of the actin cytoskeleton, including apical accumulation of an essential actin-binding protein, cortactin, and inhibited expression of the RSV F protein. These barrier-protective and antiviral-function of cAMP signaling were evident even when cAMP level was increased after the onset of RSV infection. Taken together, our study demonstrates that cAMP/PKA signaling attenuated RSV-induced disruption of structure and functions of the model airway epithelial barrier by mechanisms involving the stabilization of epithelial junctions and inhibition of viral biogenesis. Improving our understanding of the mechanisms involved in RSV-induced epithelial dysfunction and viral pathogenesis will help to develop novel anti-viral therapeutic approaches.
Collapse
Affiliation(s)
- Fariba Rezaee
- Pediatric Research Center and Pediatric Institute, Cleveland Clinic Children’s, Cleveland, Ohio, United States of America
- Pathobiology Department, Lerner Research Institute, Cleveland, Ohio, United States of America
| | - Terri J. Harford
- Pediatric Research Center and Pediatric Institute, Cleveland Clinic Children’s, Cleveland, Ohio, United States of America
- Pathobiology Department, Lerner Research Institute, Cleveland, Ohio, United States of America
| | - Debra T. Linfield
- Pediatric Research Center and Pediatric Institute, Cleveland Clinic Children’s, Cleveland, Ohio, United States of America
- Pathobiology Department, Lerner Research Institute, Cleveland, Ohio, United States of America
| | - Ghaith Altawallbeh
- Pediatric Research Center and Pediatric Institute, Cleveland Clinic Children’s, Cleveland, Ohio, United States of America
- Pathobiology Department, Lerner Research Institute, Cleveland, Ohio, United States of America
| | - Ronald J. Midura
- Biomedical Engineering Department, Lerner Research Institute, Cleveland, Ohio, United States of America
| | - Andrei I. Ivanov
- Department of Human and Molecular Genetics, Virginia Institute of Molecular Medicine, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Giovanni Piedimonte
- Pediatric Research Center and Pediatric Institute, Cleveland Clinic Children’s, Cleveland, Ohio, United States of America
- Pathobiology Department, Lerner Research Institute, Cleveland, Ohio, United States of America
| |
Collapse
|
16
|
Sapio L, Gallo M, Illiano M, Chiosi E, Naviglio D, Spina A, Naviglio S. The Natural cAMP Elevating Compound Forskolin in Cancer Therapy: Is It Time? J Cell Physiol 2016; 232:922-927. [PMID: 27739063 DOI: 10.1002/jcp.25650] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Accepted: 10/12/2016] [Indexed: 12/24/2022]
Abstract
Cancer is a major public health problem and the second leading cause of mortality around the world. Although continuous advances in the science of oncology and cancer research are now leading to improved outcomes for many cancer patients, novel cancer treatment options are strongly demanded. Naturally occurring compounds from a variety of vegetables, fruits, and medicinal plants have been shown to exhibit various anticancer properties in a number of in vitro and in vivo studies and represent an attractive research area for the development of new therapeutic strategies to fight cancer. Forskolin is a diterpene produced by the roots of the Indian plant Coleus forskohlii. The natural compound forskolin has been used for centuries in traditional medicine and its safety has also been documented in conventional modern medicine. Forskolin directly activates the adenylate cyclase enzyme, that generates cAMP from ATP, thus, raising intracellular cAMP levels. Notably, cAMP signaling, through the PKA-dependent and/or -independent pathways, is very relevant to cancer and its targeting has shown a number of antitumor effects, including the induction of mesenchymal-to-epithelial transition, inhibition of cell growth and migration and enhancement of sensitivity to conventional antitumor drugs in cancer cells. Here, we describe some features of cAMP signaling that are relevant to cancer biology and address the state of the art concerning the natural cAMP elevating compound forskolin and its perspectives as an effective anticancer agent. J. Cell. Physiol. 232: 922-927, 2017. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Luigi Sapio
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Medical School, Naples, Italy
| | - Monica Gallo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
| | - Michela Illiano
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Medical School, Naples, Italy
| | - Emilio Chiosi
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Medical School, Naples, Italy
| | - Daniele Naviglio
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Annamaria Spina
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Medical School, Naples, Italy
| | - Silvio Naviglio
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Medical School, Naples, Italy
| |
Collapse
|
17
|
Oaxaca DM, Yang-Reid SA, Ross JA, Rodriguez G, Staniswalis JG, Kirken RA. Sensitivity of imatinib-resistant T315I BCR-ABL CML to a synergistic combination of ponatinib and forskolin treatment. Tumour Biol 2016; 37:12643-12654. [PMID: 27444277 PMCID: PMC5080333 DOI: 10.1007/s13277-016-5179-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 07/12/2016] [Indexed: 12/21/2022] Open
Abstract
Tyrosine kinase inhibitors (TKIs) have dramatically improved the life expectancy of patients suffering from chronic myeloid leukemia (CML); however, patients will eventually develop resistance to TKI therapy or adverse side effects due to secondary off-target mechanisms associated with TKIs. CML patients exhibiting TKI resistance are at greater risk of developing an aggressive and drug-insensitive disease. Drug-resistant CML typically arises in response to spontaneous mutations within the drug binding sites of the targeted oncoproteins. To better understand the mechanism of drug resistance in TKI-resistant CML patients, the BCR-ABL transformed cell line KCL22 was grown with increasing concentrations of imatinib for a period of 6 weeks. Subsequently, a drug-resistant derivative of the parental KCL22 cell line harboring the T315I gatekeeper mutation was isolated and investigated for TKI drug sensitivity via multi-agent drug screens. A synergistic combination of ponatinib- and forskolin-reduced cell viability was identified in this clinically relevant imatinib-resistant CML cell line, which also proved efficacious in other CML cell lines. In summary, this study provides new insight into the biological underpinnings of BCR-ABL-driven CML and potential rationale for investigating novel treatment strategies for patients with T315I CML.
Collapse
MESH Headings
- Apoptosis/drug effects
- Apoptosis/genetics
- Blotting, Western
- Cell Line, Tumor
- Cell Survival/drug effects
- Cell Survival/genetics
- Colforsin/pharmacology
- Drug Resistance, Neoplasm/drug effects
- Drug Resistance, Neoplasm/genetics
- Drug Synergism
- Fusion Proteins, bcr-abl/genetics
- HEK293 Cells
- Hep G2 Cells
- Humans
- Imatinib Mesylate/pharmacology
- Imidazoles/pharmacology
- K562 Cells
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Mutation
- Protein Kinase Inhibitors/pharmacology
- Pyridazines/pharmacology
- src-Family Kinases/antagonists & inhibitors
- src-Family Kinases/metabolism
Collapse
Affiliation(s)
- Derrick M Oaxaca
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Sun Ah Yang-Reid
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Jeremy A Ross
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Georgialina Rodriguez
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Joan G Staniswalis
- Department of Mathematical Sciences and Border Biomedical Research Center, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Robert A Kirken
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA.
| |
Collapse
|
18
|
Follin-Arbelet V, Misund K, Naderi EH, Ugland H, Sundan A, Blomhoff HK. The natural compound forskolin synergizes with dexamethasone to induce cell death in myeloma cells via BIM. Sci Rep 2015; 5:13001. [PMID: 26306624 PMCID: PMC4549684 DOI: 10.1038/srep13001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 06/30/2015] [Indexed: 12/19/2022] Open
Abstract
We have previously demonstrated that activation of the cyclic adenosine monophosphate (cAMP) pathway kills multiple myeloma (MM) cells both in vitro and in vivo. In the present study we have investigated the potential of enhancing the killing of MM cell lines and primary MM cells by combining the cAMP-elevating compound forskolin with the commonly used MM therapeutic drugs melphalan, cyclophosphamide, doxorubicin, bortezomib and dexamethasone. We observed that forskolin potentiated the killing induced by all the tested agents as compared to treatment with the single agents alone. In particular, forskolin had a synergistic effect on the dexamethasone-responsive cell lines H929 and OM-2. By knocking down the proapoptotic BCL-2 family member BIM, we proved this protein to be involved in the synergistic induction of apoptosis by dexamethasone and forskolin. The ability of forskolin to maintain the killing of MM cells even at lower concentrations of the conventional agents suggests that forskolin may be used to diminish treatment-associated side effects. Our findings support a potential role of forskolin in combination with current conventional agents in the treatment of MM.
Collapse
Affiliation(s)
- Virginie Follin-Arbelet
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, PO Box 1112-Blindern, N-0317 Oslo, Norway
| | - Kristine Misund
- KG Jebsen Center for Myeloma Research and Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, N-7489 Trondheim, Norway
| | - Elin Hallan Naderi
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, PO Box 1112-Blindern, N-0317 Oslo, Norway
| | - Hege Ugland
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, PO Box 1112-Blindern, N-0317 Oslo, Norway
| | - Anders Sundan
- KG Jebsen Center for Myeloma Research and Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, N-7489 Trondheim, Norway
| | - Heidi Kiil Blomhoff
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, PO Box 1112-Blindern, N-0317 Oslo, Norway
| |
Collapse
|
19
|
Reihill JA, Malcomson B, Bertelsen A, Cheung S, Czerwiec A, Barsden R, Elborn JS, Dürkop H, Hirsch B, Ennis M, Kelly C, Schock BC. Induction of the inflammatory regulator A20 by gibberellic acid in airway epithelial cells. Br J Pharmacol 2015; 173:778-89. [PMID: 26013851 DOI: 10.1111/bph.13200] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 05/12/2015] [Accepted: 05/14/2015] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND AND PURPOSE NF-κB-driven inflammation is negatively regulated by the zinc finger protein A20. Gibberellic acid (GA3 ) is a plant-derived diterpenoid with documented anti-inflammatory activity, which is reported to induce A20-like zinc finger proteins in plants. Here, we sought to investigate the anti-inflammatory effect of GA3 in airway epithelial cells and determine if the anti-inflammatory action relates to A20 induction. EXPERIMENTAL APPROACH Primary nasal epithelial cells and a human bronchial epithelial cell line (16HBE14o-) were used. Cells were pre-incubated with GA3 , stimulated with Pseudomonas aeruginosa LPS; IL-6 and IL-8 release, A20, NF-κB and IκBα expression were then evaluated. To determine if any observed anti-inflammatory effect occurred via an A20-dependent mechanism, A20 was silenced using siRNA. KEY RESULTS Cells pre-incubated with GA3 had significantly increased levels of A20 mRNA (4 h) and protein (24 h), resulting in a significant reduction in IL-6 and IL-8 release. This effect was mediated via reduced IκBα degradation and reduced NF-κB (p65) expression. Furthermore, the anti-inflammatory action of GA3 was abolished in A20-silenced cells. CONCLUSIONS AND IMPLICATIONS We showed that A20 induction by GA3 attenuates inflammation in airway epithelial cells, at least in part through its effect on NF-κB and IκBα. GA3 or gibberellin-derived derivatives could potentially be developed into anti-inflammatory drugs for the treatment of chronic inflammatory diseases associated with A20 dysfunction.
Collapse
Affiliation(s)
- J A Reihill
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - B Malcomson
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - A Bertelsen
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - S Cheung
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - A Czerwiec
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - R Barsden
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - J S Elborn
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - H Dürkop
- Institute für Pathodiagnostik, Berlin, Germany
| | - B Hirsch
- Charité-University, Institute of Pathology, Berlin, Germany
| | - M Ennis
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| | - C Kelly
- Northern Ireland Centre for Stratified Medicine, University of Ulster, Londonderry, UK
| | - B C Schock
- Centre for Infection and Immunity, Queen's University of Belfast, Belfast, UK
| |
Collapse
|
20
|
Sharif M, Khan BT, Aleem SB, Anwar MA. A comparative study of the beneficial effects of ipratropium and beclomethasone against insulin-induced tracheal tissue contraction in a guinea pig model. Med Princ Pract 2015; 24:92-5. [PMID: 25278282 PMCID: PMC5588183 DOI: 10.1159/000366259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 08/03/2014] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To evaluate the acute effects of insulin on airway reactivity and the protective effects of beclomethasone and ipratropium against insulin-induced airway hyperresponsiveness on isolated tracheal smooth muscle in a guinea pig model. MATERIALS AND METHODS The trachea of each guinea pig was excised; one end of the tracheal strip was attached to the hook of the oxygen tube of a tissue bath and the other end was connected to a research-grade isometric force displacement transducer. The effects of varying concentrations of insulin (10(-7) to 10(-3)M) and insulin pretreated with a fixed concentration of beclomethasone (10(-6)M) and ipratropium (10(-6)M) on the isolated tracheal tissue were studied by constructing cumulative concentration-response curves. Changes in tracheal smooth muscle contractions were recorded on a 4-channel oscillograph. RESULTS The means ± standard error of the mean of the maximum amplitude of contraction with increasing concentrations of insulin and of insulin pretreated with fixed concentrations of beclomethasone and ipratropium were 35 ± 1.13, 22 ± 1.15 and 27.8 ± 1.27 mm, respectively. CONCLUSION The data showed that beclomethasone inhibited the contractile response of insulin to a greater extent than ipratropium. Thus we suggest that inhalational insulin pretreated with beclomethasone may be more efficacious than with ipratropium for the amelioration of potential respiratory adverse effects such as bronchoconstriction.
Collapse
Affiliation(s)
- Mahjabeen Sharif
- Department of Pharmacology and Therapeutics, Army Medical College Rawalpindi, National University of Sciences and Technology, Islamabad, Pakistan
- *Dr. Mahjabeen Sharif, Assistant Professor, Department of Pharmacology and Therapeutics, Army Medical College Rawalpindi, National University of Sciences and Technology, Islamabad 44000 (Pakistan), E-Mail
| | - Bushra Tayyaba Khan
- Department of Pharmacology and Therapeutics, Army Medical College Rawalpindi, National University of Sciences and Technology, Islamabad, Pakistan
| | - Shoaib Bin Aleem
- Department of Physiology, Army Medical College Rawalpindi, National University of Sciences and Technology, Islamabad, Pakistan
| | - Mohammad Asim Anwar
- Department of Pakistan Atomic Energy Commission General Hospital, Islamabad, Pakistan
| |
Collapse
|
21
|
Follin-Arbelet V, Torgersen ML, Naderi EH, Misund K, Sundan A, Blomhoff HK. Death of multiple myeloma cells induced by cAMP-signaling involves downregulation of Mcl-1 via the JAK/STAT pathway. Cancer Lett 2013; 335:323-31. [PMID: 23454584 DOI: 10.1016/j.canlet.2013.02.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 02/12/2013] [Accepted: 02/20/2013] [Indexed: 01/05/2023]
Abstract
There is a continuous search for new therapeutic targets for treatment of multiple myeloma (MM). Here we investigated the mechanisms involved in cAMP-induced apoptosis of human MM cells. cAMP-increasing agents rapidly inhibited activation of JAK1 and its substrate STAT3. In line with STAT3 being a regulator of Mcl-1 transcription, the expression of this pro-survival factor was rapidly and selectively reduced. Notably, exogenous interleukin-6 neither prevented the inhibition of JAK1/STAT3 nor the death of MM cells induced by cAMP. Our results suggest that cAMP-mediated killing of MM cells involves inhibition of the JAK/STAT pathway, making the cAMP-pathway a promising target for treatment of MM.
Collapse
Affiliation(s)
- Virginie Follin-Arbelet
- Department of Biochemistry, Institute of Basic Medical Sciences, University of Oslo, PO Box 1112, Blindern, N-0317 Oslo, Norway
| | | | | | | | | | | |
Collapse
|