1
|
Xie S, Sun Y, Zhao X, Xiao Y, Zhou F, Lin L, Wang W, Lin B, Wang Z, Fang Z, Wang L, Zhang Y. An update of the molecular mechanisms underlying anthracycline induced cardiotoxicity. Front Pharmacol 2024; 15:1406247. [PMID: 38989148 PMCID: PMC11234178 DOI: 10.3389/fphar.2024.1406247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 06/10/2024] [Indexed: 07/12/2024] Open
Abstract
Anthracycline drugs mainly include doxorubicin, epirubicin, pirarubicin, and aclamycin, which are widely used to treat a variety of malignant tumors, such as breast cancer, gastrointestinal tumors, lymphoma, etc. With the accumulation of anthracycline drugs in the body, they can induce serious heart damage, limiting their clinical application. The mechanism by which anthracycline drugs cause cardiotoxicity is not yet clear. This review provides an overview of the different types of cardiac damage induced by anthracycline-class drugs and delves into the molecular mechanisms behind these injuries. Cardiac damage primarily involves alterations in myocardial cell function and pathological cell death, encompassing mitochondrial dysfunction, topoisomerase inhibition, disruptions in iron ion metabolism, myofibril degradation, and oxidative stress. Mechanisms of uptake and transport in anthracycline-induced cardiotoxicity are emphasized, as well as the role and breakthroughs of iPSC in cardiotoxicity studies. Selected novel cardioprotective therapies and mechanisms are updated. Mechanisms and protective strategies associated with anthracycline cardiotoxicity in animal experiments are examined, and the definition of drug damage in humans and animal models is discussed. Understanding these molecular mechanisms is of paramount importance in mitigating anthracycline-induced cardiac toxicity and guiding the development of safer approaches in cancer treatment.
Collapse
Affiliation(s)
- Sicong Xie
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yuwei Sun
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xuan Zhao
- Department of General Surgery, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Yiqun Xiao
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Fei Zhou
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Liang Lin
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wei Wang
- College of Electronic and Optical Engineering and College of Flexible Electronics, Future Technology, Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Bin Lin
- Key Laboratory of Intelligent Pharmacy and Individualized Therapy of Huzhou, Department of Pharmacy, Changxing People's Hospital, Huzhou, China
| | - Zun Wang
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zixuan Fang
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Lei Wang
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yang Zhang
- Department of Rehabilitation Medicine, School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
- Key Laboratory of Intelligent Pharmacy and Individualized Therapy of Huzhou, Department of Pharmacy, Changxing People's Hospital, Huzhou, China
| |
Collapse
|
2
|
Kang JB, Koh PO. Retinoic acid alleviates the reduction of Akt and Bad phosphorylation and regulates Bcl-2 family protein interactions in animal models of ischemic stroke. PLoS One 2024; 19:e0303213. [PMID: 38753710 PMCID: PMC11098415 DOI: 10.1371/journal.pone.0303213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 04/21/2024] [Indexed: 05/18/2024] Open
Abstract
Ischemic stroke causes a lack of oxygen and glucose supply to brain, eventually leads to severe neurological disorders. Retinoic acid is a major metabolic product of vitamin A and has various biological effects. The PI3K-Akt signaling pathway is an important survival pathway in brain. Phosphorylated Akt is important in regulating survival and apoptosis. We examined whether retinoic acid has neuroprotective effects in stroke model by regulating Akt and its downstream protein, Bad. Moreover, we investigated the relationship between retinoic acid and Bcl-2 family protein interactions. Animals were intraperitoneally administered vehicle or retinoic acid (5 mg/kg) for four days before surgery and ischemic stroke was induced by middle cerebral artery occlusion (MCAO) surgery. Neurobehavioral tests were performed 24 h after MCAO and cerebral cortical tissues were collected. Cresyl violet staining and TUNEL histochemistry were performed, Western blot and immunoprecipitation analysis were performed to elucidate the expression of various proteins. Retinoic acid reduced neurological deficits and histopathological changes, decreased the number of TUNEL-positive cells, and alleviated reduction of phospho-PDK1, phospho-Akt, and phospho-Bad expression caused by MCAO damage. Immunoprecipitation analysis showed that MCAO damage reduced the interaction between phospho-Bad and 14-3-3, which was attenuated by retinoic acid. Furthermore, retinoic acid mitigated the increase in Bcl-2/Bad and Bcl-xL/Bad binding levels and the reduction in Bcl-2/Bax and Bcl-xL/Bax binding levels caused by MCAO damage. Retinoic acid alleviated MCAO-induced increase of caspase-3 and cleaved caspase-3 expression. We demonstrate that retinoic acid prevented apoptosis against cerebral ischemia through phosphorylation of Akt and Bad, maintenance of phospho-Bad and 14-3-3 binding, and regulation of Bcl-2 family protein interactions. .
Collapse
Affiliation(s)
- Ju-Bin Kang
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, Jinju, South Korea
| | - Phil-Ok Koh
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, Jinju, South Korea
| |
Collapse
|
3
|
Su D, Zhu S, Xu K, Hou Z, Hao F, Xu F, Lin Y, Zhu Y, Liu D, Duan Q, Zhang X, Yuan Y, Xu J, Tao J. Phosphoproteomic analysis reveals changes in A-Raf-related protein phosphorylation in response to Toxoplasma gondii infection in porcine macrophages. Parasit Vectors 2024; 17:191. [PMID: 38643189 PMCID: PMC11031963 DOI: 10.1186/s13071-024-06273-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 04/07/2024] [Indexed: 04/22/2024] Open
Abstract
BACKGROUND Toxoplasma gondii is an obligate intracellular protozoan parasite that causes severe threats to humans and livestock. Macrophages are the cell type preferentially infected by T. gondii in vivo. Protein phosphorylation is an important posttranslational modification involved in diverse cellular functions. A rapidly accelerated fibrosarcoma kinase (A-Raf) is a member of the Raf family of serine/threonine protein kinases that is necessary for MAPK activation. Our previous research found that knockout of A-Raf could reduce T. gondii-induced apoptosis in porcine alveolar macrophages (3D4/21 cells). However, limited information is available on protein phosphorylation variations and the role of A-Raf in macrophages infected with T. gondii. METHODS We used immobilized metal affinity chromatography (IMAC) in combination with liquid chromatography tandem mass spectrometry (LC-MS/MS) to profile changes in phosphorylation in T. gondii-infected 3D4/21 and 3D4/21-ΔAraf cells. RESULTS A total of 1647 differentially expressed phosphorylated proteins (DEPPs) with 3876 differentially phosphorylated sites (DPSs) were identified in T. gondii-infected 3D4/21 cells (p3T group) when compared with uninfected 3D4/21 cells (pho3 group), and 959 DEPPs with 1540 DPSs were identified in the p3T group compared with infected 3D4/21-ΔAraf cells (p3KT group). Venn analysis revealed 552 DPSs corresponding to 406 DEPPs with the same phosphorylated sites when comparing p3T/pho3 versus p3T/p3KT, which were identified as DPSs and DEPPs that were directly or indirectly related to A-Raf. CONCLUSIONS Our results revealed distinct responses of macrophages to T. gondii infection and the potential roles of A-Raf in fighting infection via phosphorylation of crucial proteins.
Collapse
Affiliation(s)
- Dingzeyang Su
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Shifan Zhu
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Kangzhi Xu
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Zhaofeng Hou
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China.
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China.
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China.
| | - Fuxing Hao
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, 225300, People's Republic of China
| | - Fan Xu
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Yifan Lin
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Yuyang Zhu
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Dandan Liu
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Qiangde Duan
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Xinjun Zhang
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Yuguo Yuan
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Jinjun Xu
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Jianping Tao
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, Jiangsu, 225009, People's Republic of China.
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009, People's Republic of China.
- International Research Laboratory of Prevention and Control of Important Animal Infectious Diseases and Zoonotic Diseases of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou, 225009, People's Republic of China.
| |
Collapse
|
4
|
He S, Silva LD, Rutter GA, Lim GE. A high-throughput screening approach to discover potential colorectal cancer chemotherapeutics: Repurposing drugs to disrupt 14-3-3 protein-BAD interactions. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.14.571727. [PMID: 38168191 PMCID: PMC10760183 DOI: 10.1101/2023.12.14.571727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Inducing apoptosis in different types of cancer cells is an effective therapeutic strategy. However, the success of existing chemotherapeutics can be compromised by tumor cell resistance and systemic off-target effects. Therefore, the discovery of pro-apoptotic compounds with minimal systemic side-effects is crucial. 14-3-3 proteins are molecular scaffolds that serve as important regulators of cell survival. Our previous study demonstrated that 14-3-3ζ can sequester BAD, a pro-apoptotic member of the BCL-2 protein family, in the cytoplasm and prevent its translocation to mitochondria to inhibit the induction of apoptosis. Despite being a critical mechanism of cell survival, it is unclear whether disrupting 14-3-3 protein:BAD interactions could be harnessed as a chemotherapeutic approach. Herein, we established a BRET-based high-throughput drug screening approach (Z'-score= 0.52) capable of identifying molecules that can disrupt 14-3-3ζ:BAD interactions. An FDA-approved drug library containing 1971 compounds was used for screening, and the capacity of identified hits to induce cell death was examined in NIH3T3-fibroblasts and colorectal cancer cell lines, HT-29 and Caco-2. Our in vitro results suggest that terfenadine, penfluridol, and lomitapide could be potentially repurposed for treating colorectal cancer. Moreover, our screening method demonstrates the feasibility of identifying pro-apoptotic agents that can be applied towards conditions where aberrant cell growth or function are key determinants of disease pathogenesis.
Collapse
Affiliation(s)
- Siyi He
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Cardiometabolic axis, Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Luis Delgadillo Silva
- Cardiometabolic axis, Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Guy A. Rutter
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Cardiometabolic axis, Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
- Department of Diabetes, Endocrinology and Medicine, Faculty of Medicine, Imperial College, London, UK
- LKC School of Medicine, Nanyang Technological College, Singapore, Republic of Singapore
| | - Gareth E. Lim
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Cardiometabolic axis, Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
| |
Collapse
|
5
|
Zhang P, Walko M, Wilson A. Maleimide constrained BAD BH3 domain peptides as BCL-xL Inhibitors: A Versatile Approach to Rapidly Identify Sites Compatible with Peptide Constraining. Bioorg Med Chem Lett 2023; 87:129260. [PMID: 36997005 DOI: 10.1016/j.bmcl.2023.129260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023]
Abstract
Development of protein-protein interaction (PPI) inhibitors remains a major challenge. A significant number of PPIs are mediated by helical recognition epitopes; although peptides derived from such epitopes are attractive templates for inhibitor design, they may not readily adopt a bioactive conformation, are susceptible to proteolysis and rarely elicit optimal cell uptake properties. Constraining peptides has therefore emerged as a useful method to mitigate against these liabilities in the development of PPI inhibitors. Building on our recently reported method for constraining peptides by reaction of dibromomaleimide derivatives with two cysteines positioned in an i and i + 4 relationship, in this study, we showcase the power of the method for rapid identification of ideal constraining positions using a maleimide-staple scan based on a 19-mer sequence derived from the BAD BH3 domain. We found that the maleimide constraint had little or a detrimental impact on helicity and potency in most sequences, but successfully identified i, i + 4 positions where the maleimide constraint was tolerated. Analyses using modelling and molecular dynamics (MD) simulations revealed that the inactive constrained peptides likely lose interactions with the protein as a result of introducing the constraint.
Collapse
|
6
|
Xu Y, Yuan F, Sun Q, Zhao L, Hong Y, Tong S, Qi Y, Ye L, Hu P, Ye Z, Zhang S, Liu B, Chen Q. The RNA-binding protein CSTF2 regulates BAD to inhibit apoptosis in glioblastoma. Int J Biol Macromol 2023; 226:915-926. [PMID: 36521710 DOI: 10.1016/j.ijbiomac.2022.12.044] [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: 10/06/2022] [Revised: 11/30/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022]
Abstract
RNA-binding proteins (RBP) regulate several aspects of co- and post-transcriptional gene expression in cancer cells. CSTF2 is involved in the expression of many cellular mRNAs and involved in the 3'-end cleavage and polyadenylation of pre-mRNAs to terminate transcription. However, the role of CSTF2 in human glioblastoma (GBM) and the underlying mechanisms remain unclear. In the present study, CSTF2 was found to be upregulated in GBM, and its high expression predicted poor prognosis. Knockdown CSTF2 induced GBM cell apoptosis both in vitro and in vivo. Specific mechanism studies showed that CSTF2 unstabilized the mRNA of the BAD protein by shortening its 3' UTR. Additionally, an increase in the expression level of CSTF2 decreased the expression level of BAD. In conclusion, CSTF2 binds to the mRNA of the BAD protein to shorten its 3'UTR, which negatively affects the BAD mediated apoptosis and promotes GBM cell survival.
Collapse
Affiliation(s)
- Yang Xu
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, People's Republic of China
| | - Fanen Yuan
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, People's Republic of China
| | - Qian Sun
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, People's Republic of China
| | - Linyao Zhao
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, People's Republic of China
| | - Yu Hong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, People's Republic of China
| | - Shiao Tong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, People's Republic of China
| | - Yangzhi Qi
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China
| | - Liguo Ye
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China
| | - Ping Hu
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China
| | - Zhang Ye
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China
| | - Si Zhang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430060, People's Republic of China
| | - Baohui Liu
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China.
| | - Qianxue Chen
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan University, 238 Jiefang Street, Wuhan, Hubei 430060, People's Republic of China.
| |
Collapse
|
7
|
Mc Auley MT. DNA methylation in genes associated with the evolution of ageing and disease: A critical review. Ageing Res Rev 2021; 72:101488. [PMID: 34662746 DOI: 10.1016/j.arr.2021.101488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/30/2021] [Accepted: 10/12/2021] [Indexed: 12/28/2022]
Abstract
Ageing is characterised by a physical decline in biological functioning which results in a progressive risk of mortality with time. As a biological phenomenon, it is underpinned by the dysregulation of a myriad of complex processes. Recently, however, ever-increasing evidence has associated epigenetic mechanisms, such as DNA methylation (DNAm) with age-onset pathologies, including cancer, cardiovascular disease, and Alzheimer's disease. These diseases compromise healthspan. Consequently, there is a medical imperative to understand the link between epigenetic ageing, and healthspan. Evolutionary theory provides a unique way to gain new insights into epigenetic ageing and health. This review will: (1) provide a brief overview of the main evolutionary theories of ageing; (2) discuss recent genetic evidence which has revealed alleles that have pleiotropic effects on fitness at different ages in humans; (3) consider the effects of DNAm on pleiotropic alleles, which are associated with age related disease; (4) discuss how age related DNAm changes resonate with the mutation accumulation, disposable soma and programmed theories of ageing; (5) discuss how DNAm changes associated with caloric restriction intersect with the evolution of ageing; and (6) conclude by discussing how evolutionary theory can be used to inform investigations which quantify age-related DNAm changes which are linked to age onset pathology.
Collapse
Affiliation(s)
- Mark Tomás Mc Auley
- Faculty of Science and Engineering, University of Chester, Exton Park, Chester CH1 4BJ, UK.
| |
Collapse
|
8
|
Sluchanko NN, Tugaeva KV, Gushchin I, Remeeva A, Kovalev K, Cooley RB. Crystal structure of human 14-3-3ζ complexed with the noncanonical phosphopeptide from proapoptotic BAD. Biochem Biophys Res Commun 2021; 583:100-105. [PMID: 34735870 DOI: 10.1016/j.bbrc.2021.10.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 10/21/2021] [Indexed: 10/20/2022]
Abstract
Several signaling pathways control phosphorylation of the proapoptotic protein BAD and its phosphorylation-dependent association with 14-3-3 proteins in the cytoplasm. The stability of the 14-3-3/BAD complex determines the cell fate: unphosphorylated BAD escapes from 14-3-3, migrates to the mitochondria and initiates apoptosis. While the 14-3-3/BAD interaction represents a promising drug target, it lacks structural characterization. Among several phosphosites identified in vivo, Ser75 and Ser99 of human BAD match the consensus sequence RXXpSXP recognized by 14-3-3 and, therefore, represent canonical 14-3-3-binding sites. Yet, BAD contains other serines phosphorylatable in vivo, whose role is less understood. Here, we report a 2.36 Å crystal structure of 14-3-3ζ complexed with a BAD fragment which includes residues Ser74 and Ser75, both being substrates for protein kinases. While the BAD peptide is anchored to 14-3-3 by phosphoserine as expected, the BAD peptide was unexpectedly phosphorylated at Ser74 instead of Ser75, revealing noncanonical binding within the amphipathic groove and leading to a one-step positional shift and reorganization of the interface. This observation exemplifies plasticity of the amphipathic 14-3-3 groove in accommodating various peptides and suggests the redundancy of Ser74 and Ser75 phosphosites with respect to binding of BAD to 14-3-3.
Collapse
Affiliation(s)
- Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071, Moscow, Russia.
| | - Kristina V Tugaeva
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071, Moscow, Russia
| | - Ivan Gushchin
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, 141701, Dolgoprudny, Russia
| | - Alina Remeeva
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, 141701, Dolgoprudny, Russia
| | - Kirill Kovalev
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, 141701, Dolgoprudny, Russia; European Molecular Biology Laboratory, 22607, Hamburg, Germany
| | - Richard B Cooley
- Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR, 97331, USA
| |
Collapse
|
9
|
Boonyoung G, Panrat T, Phongdara A, Wanna W. Evaluation of the relationship between the 14-3-3ε protein and LvRab11 in the shrimp Litopenaeus vannamei during WSSV infection. Sci Rep 2021; 11:19188. [PMID: 34584112 PMCID: PMC8478922 DOI: 10.1038/s41598-021-97828-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 08/24/2021] [Indexed: 02/08/2023] Open
Abstract
The 14-3-3 proteins interact with a wide variety of cellular proteins for many diverse functions in biological processes. In this study, a yeast two-hybrid assay revealed that two 14-3-3ε isoforms (14-3-3ES and 14-3-3EL) interacted with Rab11 in the white shrimp Litopenaeus vannamei (LvRab11). The interaction of 14-3-3ε and LvRab11 was confirmed by a GST pull-down assay. The LvRab11 open reading frame was 645 bp long, encoding a protein of 214 amino acids. Possible complexes of 14-3-3ε isoforms and LvRab11 were elucidated by in silico analysis, in which LvRab11 showed a better binding energy score with 14-3-3EL than with 14-3-3ES. In shrimp challenged with the white spot syndrome virus (WSSV), the mRNA expression levels of LvRab11 and 14-3-3ε were significantly upregulated at 48 h after challenge. To determine whether LvRab11 and binding between 14-3-3ε and LvRab11 are active against WSSV infection, an in vivo neutralization assay and RNA interference were performed. The results of in vivo neutralization showed that LvRab11 and complexes of 14-3-3ε/LvRab11 delayed mortality in shrimp challenged with WSSV. Interestingly, in the RNAi experiments, the silencing effect of LvRab11 in WSSV-infected shrimp resulted in decreased ie-1 mRNA expression and WSSV copy number. Whereas suppression of complex 14-3-3ε/LvRab11 increased WSSV replication. This study has suggested two functions of LvRab11 in shrimp innate immunity; (1) at the early stage of WSSV infection, LvRab11 might play an important role in WSSV infection processes and (2) at the late stage of infection, the 14-3-3ε/LvRab11 interaction acquires functions that are involved in immune response against WSSV invasion.
Collapse
Affiliation(s)
- Guson Boonyoung
- grid.7130.50000 0004 0470 1162Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand
| | - Tanate Panrat
- grid.7130.50000 0004 0470 1162Prince of Songkla University International College, Hat Yai Campus, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand
| | - Amornrat Phongdara
- grid.7130.50000 0004 0470 1162Center for Genomics and Bioinformatics Research, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand
| | - Warapond Wanna
- grid.7130.50000 0004 0470 1162Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand ,grid.7130.50000 0004 0470 1162Center for Genomics and Bioinformatics Research, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand
| |
Collapse
|
10
|
Liu J, Cao S, Ding G, Wang B, Li Y, Zhao Y, Shao Q, Feng J, Liu S, Qin L, Xiao Y. The role of 14-3-3 proteins in cell signalling pathways and virus infection. J Cell Mol Med 2021; 25:4173-4182. [PMID: 33793048 PMCID: PMC8093981 DOI: 10.1111/jcmm.16490] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/06/2021] [Accepted: 03/13/2021] [Indexed: 12/14/2022] Open
Abstract
14-3-3 proteins are highly conserved in species ranging from yeast to mammals and regulate numerous signalling pathways via direct interactions with proteins carrying phosphorylated 14-3-3-binding motifs. Recent studies have shown that 14-3-3 proteins can also play a role in viral infections. This review summarizes the biological functions of 14-3-3 proteins in protein trafficking, cell-cycle control, apoptosis, autophagy and other cell signal transduction pathways, as well as the associated mechanisms. Recent findings regarding the role of 14-3-3 proteins in viral infection and innate immunity are also reviewed.
Collapse
Affiliation(s)
- Jiaqi Liu
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Shengliang Cao
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Guofei Ding
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Bin Wang
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Yingchao Li
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Yuzhong Zhao
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Qingyuan Shao
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Jian Feng
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Sidang Liu
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| | - Liting Qin
- Shandong New Hope Liuhe Group Co., Ltd.QingdaoChina
- Qingdao Jiazhi Biotechnology Co., Ltd.QingdaoChina
| | - Yihong Xiao
- Department of Fundamental Veterinary MedicineCollege of Animal Science and Veterinary MedicineShandong Agricultural UniversityTai'anChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTai’anChina
| |
Collapse
|
11
|
Gupta A, Hadj-Moussa H, Al-Attar R, Seibel BA, Storey KB. Hypoxic Jumbo Squid Activate Neuronal Apoptosis but Not MAPK or Antioxidant Enzymes during Oxidative Stress. Physiol Biochem Zool 2021; 94:171-179. [PMID: 33830886 DOI: 10.1086/714097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AbstractThe limitations that hypoxia imparts on mitochondrial oxygen supply are circumvented by the activation of anaerobic metabolism and prosurvival mechanisms in hypoxia-tolerant animals. To deal with the hypoxia that jumbo squid (Dosidicus gigas) experience in the ocean's depth, they depress their metabolic rate by up to 52% relative to normoxic conditions. This is coupled with molecular reorganization to facilitate their daily descents into the ocean's oxygen minimum zone, where they face not only low oxygen levels but also higher pressures and colder frigid waters. Our current study explores the tissue-specific hypoxia responses of three central processes: (1) antioxidant enzymes responsible for defending against oxidative stress, (2) early apoptotic machinery that signals the activation of cell death, and (3) mitogen-activated protein kinases (MAPKs) that act as central regulators of numerous cellular processes. Luminex xMAP technology was used to assess protein levels and phosphorylation states under normoxic and hypoxic conditions in brains, branchial hearts, and mantle muscles. Hypoxic brains were found to activate apoptosis via upregulation of phospho-p38, phospho-p53, activated caspase 8, and activated caspase 9, whereas branchial hearts were the only tissue to show an increase in antioxidant enzyme levels. Hypoxic muscles seemed the least affected by hypoxia. Our results suggest that hypoxic squid do not undergo large dynamic changes in the phosphorylation states of key apoptotic and central MAPK factors, except for brains, suggesting that these mechanisms are involved in squid hypometabolic responses.
Collapse
|
12
|
Edelmann J, Dokal AD, Vilventhraraja E, Holzmann K, Britton D, Klymenko T, Döhner H, Cragg M, Braun A, Cutillas P, Gribben JG. Rituximab and obinutuzumab differentially hijack the B cell receptor and NOTCH1 signaling pathways. iScience 2021; 24:102089. [PMID: 33615197 PMCID: PMC7878992 DOI: 10.1016/j.isci.2021.102089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/17/2020] [Accepted: 01/18/2021] [Indexed: 12/24/2022] Open
Abstract
The anti-CD20 monoclonal antibodies rituximab and obinutuzumab differ in their mechanisms of action, with obinutuzumab evoking greater direct B cell death. To characterize the signaling processes responsible for improved B cell killing by obinutuzumab, we undertook a phosphoproteomics approach and demonstrate that rituximab and obinutuzumab differentially activate pathways downstream of the B cell receptor. Although both antibodies induce strong ERK and MYC activation sufficient to promote cell-cycle arrest and B cell death, obinutuzumab exceeds rituximab in supporting apoptosis induction by means of aberrant SYK phosphorylation. In contrast, rituximab elicits stronger anti-apoptotic signals by activating AKT, by impairing pro-apoptotic BAD, and by releasing membrane-bound NOTCH1 to up-regulate pro-survival target genes. As a consequence, rituximab appears to reinforce BCL2-mediated apoptosis resistance. The unexpected complexity and differences by which rituximab and obinutuzumab interfere with signaling pathways essential for lymphoma pathogenesis and treatment provide important impetus to optimize and personalize the application of different anti-CD20 treatments.
Collapse
Affiliation(s)
- Jennifer Edelmann
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
- Department of Internal Medicine III, Ulm University, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Arran D. Dokal
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
- Kinomica Limited, Biohub Alderley Park, Alderley Edge, Macclesfield, Cheshire, SK10 4TG, UK
| | - Emma Vilventhraraja
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - Karlheinz Holzmann
- Center for Clinical Research, Genomics Core Facility, Ulm University, Helmholtzstr. 8/1, 89081 Ulm, Germany
| | - David Britton
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
- Kinomica Limited, Biohub Alderley Park, Alderley Edge, Macclesfield, Cheshire, SK10 4TG, UK
| | - Tetyana Klymenko
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
- Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK
| | - Hartmut Döhner
- Department of Internal Medicine III, Ulm University, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Mark Cragg
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, SO16 6YD, UK
| | - Andrejs Braun
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - Pedro Cutillas
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
- Kinomica Limited, Biohub Alderley Park, Alderley Edge, Macclesfield, Cheshire, SK10 4TG, UK
| | - John G. Gribben
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| |
Collapse
|
13
|
Giannakou LE, Giannopoulos AS, Hatzoglou C, Gourgoulianis KI, Rouka E, Zarogiannis SG. Investigation and Functional Enrichment Analysis of the Human Host Interaction Network with Common Gram-Negative Respiratory Pathogens Predicts Possible Association with Lung Adenocarcinoma. PATHOPHYSIOLOGY 2021; 28:20-33. [PMID: 35366267 PMCID: PMC8830454 DOI: 10.3390/pathophysiology28010003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 11/16/2022] Open
Abstract
Haemophilus influenzae (Hi), Moraxella catarrhalis (MorCa) and Pseudomonas aeruginosa (Psa) are three of the most common gram-negative bacteria responsible for human respiratory diseases. In this study, we aimed to identify, using the functional enrichment analysis (FEA), the human gene interaction network with the aforementioned bacteria in order to elucidate the full spectrum of induced pathogenicity. The Human Pathogen Interaction Database (HPIDB 3.0) was used to identify the human proteins that interact with the three pathogens. FEA was performed via the ToppFun tool of the ToppGene Suite and the GeneCodis database so as to identify enriched gene ontologies (GO) of biological processes (BP), cellular components (CC) and diseases. In total, 11 human proteins were found to interact with the bacterial pathogens. FEA of BP GOs revealed associations with mitochondrial membrane permeability relative to apoptotic pathways. FEA of CC GOs revealed associations with focal adhesion, cell junctions and exosomes. The most significantly enriched annotations in diseases and pathways were lung adenocarcinoma and cell cycle, respectively. Our results suggest that the Hi, MorCa and Psa pathogens could be related to the pathogenesis and/or progression of lung adenocarcinoma via the targeting of the epithelial cellular junctions and the subsequent deregulation of the cell adhesion and apoptotic pathways. These hypotheses should be experimentally validated.
Collapse
Affiliation(s)
- Lydia-Eirini Giannakou
- Department of Physiology, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (L.-E.G.); (A.-S.G.); (C.H.); (S.G.Z.)
| | - Athanasios-Stefanos Giannopoulos
- Department of Physiology, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (L.-E.G.); (A.-S.G.); (C.H.); (S.G.Z.)
| | - Chrissi Hatzoglou
- Department of Physiology, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (L.-E.G.); (A.-S.G.); (C.H.); (S.G.Z.)
- Department of Respiratory Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece;
| | - Konstantinos I. Gourgoulianis
- Department of Respiratory Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece;
| | - Erasmia Rouka
- Department of Physiology, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (L.-E.G.); (A.-S.G.); (C.H.); (S.G.Z.)
- Department of Respiratory Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece;
- Correspondence:
| | - Sotirios G. Zarogiannis
- Department of Physiology, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece; (L.-E.G.); (A.-S.G.); (C.H.); (S.G.Z.)
- Department of Respiratory Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, 41500 Larissa, Greece;
| |
Collapse
|
14
|
Wang Y, Chiou YS, Chong QY, Zhang M, Rangappa KS, Ma L, Zhu T, Kumar AP, Huang RYJ, Pandey V, Basappa, Lobie PE. Pharmacological Inhibition of BAD Ser99 Phosphorylation Enhances the Efficacy of Cisplatin in Ovarian Cancer by Inhibition of Cancer Stem Cell-like Behavior. ACS Pharmacol Transl Sci 2020; 3:1083-1099. [PMID: 33344891 DOI: 10.1021/acsptsci.0c00064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Indexed: 02/06/2023]
Abstract
Platinum-based chemotherapy has been the standard treatment for ovarian cancer patients for approximately four decades. However, the prognosis of patients with advanced ovarian carcinoma remains dismal, mainly attributed to both dose-limiting toxicities of cisplatin and the high rate of chemo-resistant disease recurrence. Herein, both patient-derived and experimentally generated cisplatin-sensitive and -resistant ovarian cancer cell line models were used to delineate BADSer99 phosphorylation as an actionable target in ovarian cancer. BADSer99 phosphorylation was negatively associated with cisplatin sensitivity in ovarian cancer, and the inhibition of BADSer99 phosphorylation by point mutation induced apoptosis and reduced cisplatin IC50. In addition, BAD phosphorylation was also shown to be associated with cancer stem cell-like properties. Henceforth, a novel small molecule which inhibits BAD phosphorylation specifically at Ser99 (NPB) was utilized. NPB promoted apoptosis and reduced 3D growth of bulk cancer cells and inhibited cancer stem cell-like properties in both cisplatin-sensitive and -resistant ovarian cancer cells. The combination of cisplatin with NPB exhibited synergistic effects in vitro. NPB in combination with cisplatin also achieved an improved outcome compared to either monotreatment in vivo, including suppression of the cancer stem cell population, an effect not observed with cisplatin treatment. Furthermore, NPB exhibited strong synergistic effects with the AKT inhibitor AZD5363, and significantly reduced its IC50 in cells resistant to cisplatin treatment. These findings identify BADSer99 phosphorylation as an actionable and pharmacologically relevant target to improve outcomes of cisplatin treated ovarian cancer.
Collapse
Affiliation(s)
- Yanxin Wang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 119260, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 119260, Singapore
| | - Yi-Shiou Chiou
- Tsinghua Berkeley Shenzhen Institute (TBSI), Shenzhen, 518000, China
| | - Qing-Yun Chong
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 119260, Singapore
| | - Mengyi Zhang
- College of Pharmacy, Nankai University, Tianjin, 300071, China
| | | | - Lan Ma
- Tsinghua Berkeley Shenzhen Institute (TBSI), Shenzhen, 518000, China.,Shenzhen Bay Laboratory, Shenzhen, 518000, China
| | - Tao Zhu
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Alan Prem Kumar
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 119260, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 119260, Singapore
| | - Ruby Yun-Ju Huang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 119260, Singapore.,Department of Obstetrics and Gynaecology, National University Hospital of Singapore, Singapore, 119074, Singapore.,School of Medicine, College of Medicine, National Taiwan University, Taipei, 10617, Taiwan
| | - Vijay Pandey
- Tsinghua Berkeley Shenzhen Institute (TBSI), Shenzhen, 518000, China
| | - Basappa
- Department of Studies in Organic Chemistry, University of Mysore, Mysore, 570006, India
| | - Peter E Lobie
- Tsinghua Berkeley Shenzhen Institute (TBSI), Shenzhen, 518000, China.,Shenzhen Bay Laboratory, Shenzhen, 518000, China
| |
Collapse
|
15
|
Design, expression, purification and crystallization of human 14-3-3ζ protein chimera with phosphopeptide from proapoptotic protein BAD. Protein Expr Purif 2020; 175:105707. [PMID: 32682909 DOI: 10.1016/j.pep.2020.105707] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/02/2020] [Accepted: 07/06/2020] [Indexed: 12/15/2022]
Abstract
14-3-3 protein isoforms regulate multiple processes in eukaryotes, including apoptosis and cell division. 14-3-3 proteins preferentially recognize phosphorylated unstructured motifs, justifying the protein-peptide binding approach to study 14-3-3/phosphotarget complexes. Tethering of human 14-3-3σ with partner phosphopeptides via a short linker has provided structural information equivalent to the use of synthetic phosphopeptides, simultaneously facilitating purification and crystallization. Nevertheless, the broader applicability to other 14-3-3 isoforms and phosphopeptides was unclear. Here, we designed a novel 14-3-3ζ chimera with a conserved phosphopeptide from BAD, whose complex with 14-3-3 is a gatekeeper of apoptosis regulation. The chimera could be bacterially expressed and purified without affinity tags. Co-expressed PKA efficiently phosphorylates BAD within the chimera and blocks its interaction with a known 14-3-3 phosphotarget, suggesting occupation of the 14-3-3 grooves by the tethered BAD phosphopeptide. Efficient crystallization of the engineered protein suggests suitability of the "chimeric" approach for studies of other relevant 14-3-3 complexes.
Collapse
|
16
|
Kang JB, Lee SY, Park DJ, Koh PO. Decrease of 14-3-3 proteins by glutamate exposure in the cerebral cortex of newborn rats. Lab Anim Res 2020; 36:8. [PMID: 32257920 PMCID: PMC7119159 DOI: 10.1186/s42826-020-00041-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 03/12/2020] [Indexed: 11/10/2022] Open
Abstract
Glutamate is a representative excitatory neurotransmitter. However, excessive glutamate exposure causes neuronal cell damage by generating neuronal excitotoxicity. Excitotoxicity in neonates caused by glutamate treatment induces neurological deficits in adults. The 14-3-3 family proteins are conserved proteins that are expressed ubiquitously in a variety of tissues. These proteins contribute to cellular processes, including signal transduction, protein synthesis, and cell cycle control. We proposed that glutamate induces neuronal cell damage by regulating 14-3-3 protein expression in newborn animals. In this study, we investigated the histopathological changes and 14-3-3 proteins expressions as a result of glutamate exposure in the neonatal cerebral cortex. Rat pups at post-natal day 7 were intraperitoneally administrated with vehicle or glutamate (10 mg/kg). Animals were sacrificed 4 h after treatment, and brain tissues were fixed for histological study. Cerebral cortices were isolated and frozen for proteomic study. We observed serious histopathological damages including shrunken dendrites and atypical neurons in glutamate-treated cerebral cortices. In addition, we identified that 14-3-3 family proteins decreased in glutamate-exposed cerebral cortices using a proteomic approach. Moreover, Western blot analysis provided results that glutamate treatment in neonates decreased 14-3-3 family proteins expressions, including the β/α, ζ/δ, γ, ε, τ, and η isoforms. 14-3-3 proteins are involved in signal transduction, metabolism, and anti-apoptotic functions. Thus, our findings suggest that glutamate induces neonatal neuronal cell damage by modulating 14-3-3 protein expression.
Collapse
Affiliation(s)
- Ju-Bin Kang
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
| | - Seung-Yun Lee
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
| | - Dong-Ju Park
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
| | - Phil-Ok Koh
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
| |
Collapse
|
17
|
Boac BM, Abbasi F, Ismail-Khan R, Xiong Y, Siddique A, Park H, Han M, Saeed-Vafa D, Soliman H, Henry B, Pena MJ, McClung EC, Robertson SE, Todd SL, Lopez A, Sun W, Apuri S, Lancaster JM, Berglund AE, Magliocco AM, Marchion DC. Expression of the BAD pathway is a marker of triple-negative status and poor outcome. Sci Rep 2019; 9:17496. [PMID: 31767884 PMCID: PMC6877530 DOI: 10.1038/s41598-019-53695-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 10/28/2019] [Indexed: 02/01/2023] Open
Abstract
Triple-negative breast cancer (TNBC) has few therapeutic targets, making nonspecific chemotherapy the main treatment. Therapies enhancing cancer cell sensitivity to cytotoxic agents could significantly improve patient outcomes. A BCL2-associated agonist of cell death (BAD) pathway gene expression signature (BPGES) was derived using principal component analysis (PCA) and evaluated for associations with the TNBC phenotype and clinical outcomes. Immunohistochemistry was used to determine the relative expression levels of phospho-BAD isoforms in tumour samples. Cell survival assays evaluated the effects of BAD pathway inhibition on chemo-sensitivity. BPGES score was associated with TNBC status and overall survival (OS) in breast cancer samples of the Moffitt Total Cancer Care dataset and The Cancer Genome Atlas (TCGA). TNBC tumours were enriched for the expression of phospho-BAD isoforms. Further, the BPGES was associated with TNBC status in breast cancer cell lines of the Cancer Cell Line Encyclopedia (CCLE). Targeted inhibition of kinases known to phosphorylate BAD protein resulted in increased sensitivity to platinum agents in TNBC cell lines compared to non-TNBC cell lines. The BAD pathway is associated with triple-negative status and OS. TNBC tumours were enriched for the expression of phosphorylated BAD protein compared to non-TNBC tumours. These findings suggest that the BAD pathway it is an important determinant of TNBC clinical outcomes.
Collapse
Affiliation(s)
- Bernadette M Boac
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Chemical Biology and Molecular Medicine, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Forough Abbasi
- Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Roohi Ismail-Khan
- Department of Oncologic Sciences, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Department of Women's Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Yin Xiong
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Chemical Biology and Molecular Medicine, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Atif Siddique
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Hannah Park
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Chemical Biology and Molecular Medicine, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Mingda Han
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Chemical Biology and Molecular Medicine, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Daryoush Saeed-Vafa
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Hatem Soliman
- Department of Oncologic Sciences, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Department of Women's Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Brendon Henry
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - M Juliana Pena
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - E Clair McClung
- University of Arizona Cancer Center, Obstetrics and Gynecology, Tucson, AZ, 85724, USA
| | | | - Sarah L Todd
- Department of Women's Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Alex Lopez
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Weihong Sun
- Department of Women's Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Susmitha Apuri
- Department of Women's Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | | | - Anders E Berglund
- Department of Bioinformatics and Biostatistics, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | | | - Douglas C Marchion
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.
- Chemical Biology and Molecular Medicine, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.
| |
Collapse
|
18
|
Davis LK. Intelligent Design of 14-3-3 Docking Proteins Utilizing Synthetic Evolution Artificial Intelligence (SYN-AI). ACS OMEGA 2019; 4:18948-18960. [PMID: 31763516 PMCID: PMC6868599 DOI: 10.1021/acsomega.8b03100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 07/10/2019] [Indexed: 05/13/2023]
Abstract
The ability to write DNA code from scratch will allow for the discovery of new and interesting chemistries as well as allowing the rewiring of cell signal pathways. Herein, we have utilized synthetic evolution artificial intelligence (SYN-AI) to intelligently design a set of 14-3-3 docking genes. SYN-AI engineers synthetic genes utilizing a parental gene as an evolution template. Wherein, evolution is fast-forwarded by transforming template gene sequences to DNA secondary and tertiary codes based upon gene hierarchical structural levels. The DNA secondary code allows identification of genomic building blocks across an orthologous sequence space comprising multiple genomes. Where, the DNA tertiary code allows engineering of supersecondary structures. SYN-AI constructed a library of 10 million genes that was reduced to three structurally functional 14-3-3 docking genes by applying natural selection protocols. Synthetic protein identity was verified utilizing Clustal Omega sequence alignments and Phylogeny.fr phylogenetic analysis. Wherein, we were able to confirm the three-dimensional structure utilizing I-TASSER and protein-ligand interactions utilizing COACH and Cofactor. The conservation of allosteric communications was confirmed utilizing elastic and anisotropic network models. Whereby, we utilized elNemo and ANM2.1 to confirm conservation of the 14-3-3 ζ amphipathic groove. Notably, to the best of our knowledge, we report the first 14-3-3 docking genes to be written from scratch.
Collapse
Affiliation(s)
- Leroy K. Davis
- Prairie
View A&M University, Cooperative Agricultural Research Center (CARC), 700 University Drive, Prairie
View, Texas 77446-0518, United States
- Gene
Evolution Project, LLC, Baton Rouge, Louisiana 70835, United States
| |
Collapse
|
19
|
The synthetic flavagline FL3 spares normal human skin cells from its cytotoxic effect via an activation of Bad. Toxicol In Vitro 2019; 60:27-35. [DOI: 10.1016/j.tiv.2019.04.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 04/08/2019] [Accepted: 04/23/2019] [Indexed: 12/18/2022]
|
20
|
Valenti D, Neves JF, Cantrelle FX, Hristeva S, Lentini Santo D, Obšil T, Hanoulle X, Levy LM, Tzalis D, Landrieu I, Ottmann C. Set-up and screening of a fragment library targeting the 14-3-3 protein interface. MEDCHEMCOMM 2019; 10:1796-1802. [PMID: 31814953 PMCID: PMC6839876 DOI: 10.1039/c9md00215d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/20/2019] [Indexed: 12/16/2022]
Abstract
Protein-protein interactions (PPIs) are at the core of regulation mechanisms in biological systems and consequently became an attractive target for therapeutic intervention. PPIs involving the adapter protein 14-3-3 are representative examples given the broad range of partner proteins forming a complex with one of its seven human isoforms. Given the challenges represented by the nature of these interactions, fragment-based approaches offer a valid alternative for the development of PPI modulators. After having assembled a fragment set tailored on PPIs' modulation, we started a screening campaign on the sigma isoform of 14-3-3 adapter proteins. Through the use of both mono- and bi-dimensional nuclear magnetic resonance spectroscopy measurements, coupled with differential scanning fluorimetry, three fragment hits were identified. These molecules bind the protein at two different regions distant from the usual binding groove highlighting new possibilities for selective modulation of 14-3-3 complexes.
Collapse
Affiliation(s)
- Dario Valenti
- Medicinal Chemistry , Taros Chemicals GmbH & Co. KG , Emil-Figge-Straße 76a , 44227 , Dortmund , Germany .
- Department of Biomedical Engineering and Institute for Complex Molecular Systems , Technische Universiteit Eindhoven , Den Dolech 2 , 5612 AZ Eindhoven , The Netherlands .
| | | | | | - Stanimira Hristeva
- Medicinal Chemistry , Taros Chemicals GmbH & Co. KG , Emil-Figge-Straße 76a , 44227 , Dortmund , Germany .
| | - Domenico Lentini Santo
- Department of Physical and Macromolecular Chemistry , Faculty of Science , Charles University , 12843 Prague , Czech Republic
| | - Tomáš Obšil
- Department of Physical and Macromolecular Chemistry , Faculty of Science , Charles University , 12843 Prague , Czech Republic
- Department of Structural Biology of Signaling Proteins , Division BIOCEV , Institute of Physiology of the Czech Academy of Sciences , Prumyslova 595, 252 50 Vestec , Czech Republic
| | - Xavier Hanoulle
- Univ. Lille , CNRS , UMR 8576 - UGSF , F-59000 Lille , France .
| | - Laura M Levy
- Medicinal Chemistry , Taros Chemicals GmbH & Co. KG , Emil-Figge-Straße 76a , 44227 , Dortmund , Germany .
| | - Dimitrios Tzalis
- Medicinal Chemistry , Taros Chemicals GmbH & Co. KG , Emil-Figge-Straße 76a , 44227 , Dortmund , Germany .
| | | | - Christian Ottmann
- Department of Biomedical Engineering and Institute for Complex Molecular Systems , Technische Universiteit Eindhoven , Den Dolech 2 , 5612 AZ Eindhoven , The Netherlands .
- Department of Chemistry , University of Duisburg-Essen , Universitätsstraße 7 , 45117 , Essen , Germany
| |
Collapse
|
21
|
Gu Q, Cuevas E, Raymick J, Kanungo J, Sarkar S. Downregulation of 14-3-3 Proteins in Alzheimer’s Disease. Mol Neurobiol 2019; 57:32-40. [DOI: 10.1007/s12035-019-01754-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 08/29/2019] [Indexed: 01/03/2023]
|
22
|
Holmes TR, Dindu S, Hansen LA. Aberrant localization of signaling proteins in skin cancer: Implications for treatment. Mol Carcinog 2019; 58:1631-1639. [PMID: 31062427 DOI: 10.1002/mc.23036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 01/01/2023]
Abstract
Aberrant subcellular localization of signaling proteins can provide cancer cells with advantages such as resistance to apoptotic cell death, increased invasiveness and more rapid proliferation. Nuclear to cytoplasmic shifts in tumor-promoting proteins can lead to worse patient outcomes, providing opportunities to target cancer-specific processes. Herein, we review the significance of dysregulated protein localization with a focus on skin cancer. Altered localization of signaling proteins controlling cell cycle progression or cell death is a common feature of cancer. In some instances, aberrant subcellular localization results in an acquired prosurvival function. Taking advantage of this knowledge reveals novel targets useful in the development of cancer therapeutics.
Collapse
Affiliation(s)
- Thomas R Holmes
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska
| | - Shravya Dindu
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska
| | - Laura A Hansen
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska
| |
Collapse
|
23
|
Zhu P, Gafken PR, Mehl RA, Cooley RB. A Highly Versatile Expression System for the Production of Multiply Phosphorylated Proteins. ACS Chem Biol 2019; 14:1564-1572. [PMID: 31243963 DOI: 10.1021/acschembio.9b00307] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Genetic Code Expansion (GCE) can use TAG stop codons to guide site-specific incorporation of phosphoserine (pSer) into proteins. To eliminate prematurely truncated peptides, improve yields, and enhance the production of multiphosphorylated proteins, Release Factor 1 (RF1)-deficient expression hosts were developed, yet these grew slowly and their use was associated with extensive misincorporation of natural amino acids instead of pSer. Here, we merge a healthy RF1-deficient E. coli cell line with a high-efficiency pSer GCE translation system to produce a versatile pSer GCE platform in which only trace misincorporation of natural amino acids is detected even when five phosphoserines were introduced into one protein. Approximately 400 and 200 mg of singly and doubly phosphorylated GFP per liter of culture were obtained. Importantly, the lack of truncated protein permits expression of oligomeric proteins and the use of N-terminal solubility-enhancing proteins to aid phospho-protein expression and purification. To illustrate the enhanced utility of this system, we produce doubly phosphorylated STING (Stimulator of Interferon Genes), as well as triply phosphorylated BAD (Bcl2-associated agonist of cell death) complexed with 14-3-3, in quantity, purity, and homogeneity sufficient for structural biology applications. We anticipate that the facile access to phosphoproteins enabled by this system, which we call pSer-3.1G, will expand studies of the phospho-proteome.
Collapse
Affiliation(s)
- Phillip Zhu
- Oregon State University, Department of Biochemistry and Biophysics, 2011 Agricultural and Life Sciences, Corvallis, Oregon 97331, United States
| | - Philip R. Gafken
- Proteomics Shared Resource, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, United States
| | - Ryan A. Mehl
- Oregon State University, Department of Biochemistry and Biophysics, 2011 Agricultural and Life Sciences, Corvallis, Oregon 97331, United States
| | - Richard B. Cooley
- Oregon State University, Department of Biochemistry and Biophysics, 2011 Agricultural and Life Sciences, Corvallis, Oregon 97331, United States
| |
Collapse
|
24
|
Khalesi N, Bandehpour M, Bigdeli MR, Niknejad H, Dabbagh A, Kazemi B. 14-3-3ζ protein protects against brain ischemia/reperfusion injury and induces BDNF transcription after MCAO in rat. J Appl Biomed 2019; 17:99-106. [PMID: 34907731 DOI: 10.32725/jab.2019.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 04/15/2019] [Indexed: 12/27/2022] Open
Abstract
Brain ischemia is a leading cause of death and disability worldwide that occurs when blood supply of the brain is disrupted. Brain-derived neurotrophic factor (BDNF) is a protective factor in neurodegenerative conditions. Nevertheless, there are some problems when exogenous BDNF is to be used in the clinic. 14-3-3ζ is a pro-survival highly-expressed protein in the brain that protects neurons against death. This study evaluates 14-3-3ζ effects on BDNF transcription at early time point after ischemia and its possible protective effects against ischemia damage. Human 14-3-3ζ protein was purified after expression. Rats were assigned into four groups, including sham, ischemia, and two treatment groups. Stereotaxic cannula implantation was carried out in the right cerebral ventricle. After one week, rats underwent middle cerebral artery occlusion (MCAO) surgery and received 14-3-3ζ (produced in our laboratory or standard form as control) in the middle of ischemia time. At 6 h of reperfusion after ischemia, brain parts containing the hippocampus, the cortex, the piriform cortex-amygdala and the striatum were collected for real time PCR analysis. At 24 h of reperfusion after ischemia, neurological function evaluation and infarction volume measurement were performed. The present study showed that 14-3-3ζ could up-regulate BDNF mRNA at early time point after ischemia in the hippocampus, in the cortex and in the piriform cortex-amygdala and could also improve neurological outcome and reduce infarct volume. It seems that 14-3-3ζ could be a candidate factor for increasing endogenous BDNF in the brain and a potential therapeutic factor against brain ischemia.
Collapse
Affiliation(s)
- Naeemeh Khalesi
- Shahid Beheshti University of Medical Sciences, School of Advanced Technologies in Medicine, Biotechnology Department, Tehran, Iran
| | - Mojgan Bandehpour
- Shahid Beheshti University of Medical Sciences, Cellular and Molecular Biology Research Center, Tehran, Iran
| | - Mohammad Reza Bigdeli
- Shahid Beheshti University, Faculty of Life Sciences and Biotechnology, Department of Animal Sciences and Biotechnology, Tehran, Iran.,Shahid Beheshti University, Institute for Cognitive and Brain Science, Tehran, Iran
| | - Hassan Niknejad
- Shahid Beheshti University of Medical Sciences, School of Medicine, Department of Pharmacology, Tehran, Iran
| | - Ali Dabbagh
- Shahid Beheshti University of Medical Sciences, Anesthesiology Research Center, Tehran, Iran
| | - Bahram Kazemi
- Shahid Beheshti University of Medical Sciences, School of Advanced Technologies in Medicine, Biotechnology Department, Tehran, Iran.,Shahid Beheshti University of Medical Sciences, Cellular and Molecular Biology Research Center, Tehran, Iran
| |
Collapse
|
25
|
Smani D, Sarkar S, Raymick J, Kanungo J, Paule MG, Gu Q. Downregulation of 14-3-3 Proteins in a Kainic Acid-Induced Neurotoxicity Model. Mol Neurobiol 2019; 55:122-129. [PMID: 28840498 DOI: 10.1007/s12035-017-0724-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The 14-3-3 proteins are among the most abundant proteins expressed in the brain, comprising about 1% of the total amount of soluble brain proteins. Through phosphoserine- and phosphothreonine-binding motifs, 14-3-3 proteins regulate many signaling proteins and cellular processes including cell death. In the present study, we utilized a well-known kainic acid (KA)-induced excitotoxicity rat model and examined the expression of 14-3-3 and its isoforms in the frontal cortex of KA-treated and control animals. Among the different 14-3-3 isoforms, abundant levels of eta and tau were detected in the frontal cortex, followed by sigma, epsilon, and gamma, while the expression levels of alpha/beta and zeta/delta isoforms were low. Compared to the control animals, KA treatment induced a significant downregulation of the overall 14-3-3 protein level as well as the levels of the abundant isoforms eta, tau, epsilon, and gamma. We also investigated two 14-3-3-interacting proteins that are involved in the cell death process: Bcl-2-associated X (BAX) and extracellular signal-regulated kinase (ERK). Both BAX and phosphorylated ERK showed increased levels following KA treatment. Together, these findings demonstrate an abundance of several 14-3-3 isoforms in the frontal cortex and that KA treatment can cause a downregulation of 14-3-3 expression and an upregulation of 14-3-3-interacting proteins BAX and phospho-ERK. Thus, downregulation of 14-3-3 proteins could be one of the early molecular events associated with excitotoxicity. This could lead to subsequent upregulation of 14-3-3-binding proteins such as BAX and phospho-ERK that contribute to further downstream apoptosis processes, eventually leading to cell death. Maintaining sufficient levels of 14-3-3 expression and function may become a target of therapeutic intervention for excitotoxicity-induced neurodegeneration.
Collapse
Affiliation(s)
- Danyal Smani
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Rd, Jefferson, AR, 72079, USA
| | - Sumit Sarkar
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Rd, Jefferson, AR, 72079, USA
| | - James Raymick
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Rd, Jefferson, AR, 72079, USA
| | - Jyotshna Kanungo
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Rd, Jefferson, AR, 72079, USA
| | - Merle G Paule
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Rd, Jefferson, AR, 72079, USA
| | - Qiang Gu
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Rd, Jefferson, AR, 72079, USA.
| |
Collapse
|
26
|
Clinical candidates modulating protein-protein interactions: The fragment-based experience. Eur J Med Chem 2019; 167:76-95. [DOI: 10.1016/j.ejmech.2019.01.084] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/30/2019] [Accepted: 01/31/2019] [Indexed: 12/23/2022]
|
27
|
Lin JP, Fan YK, Liu HM. The 14-3-3η chaperone protein promotes antiviral innate immunity via facilitating MDA5 oligomerization and intracellular redistribution. PLoS Pathog 2019; 15:e1007582. [PMID: 30742689 PMCID: PMC6386420 DOI: 10.1371/journal.ppat.1007582] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 02/22/2019] [Accepted: 01/15/2019] [Indexed: 12/22/2022] Open
Abstract
MDA5 belongs to the RIG-I-like receptor family and plays a non-redundant role in recognizing cytoplasmic viral RNA to induce the production of type I IFNs. Upon RNA ligand stimulation, we observed the redistribution of MDA5 from the cytosol to mitochondrial membrane fractions. However, the molecular mechanisms of MDA5 activation remain less understood. Here we show that 14-3-3η is an essential accessory protein for MDA5-dependent type I IFN induction. We found that several 14-3-3 isoforms may interact with MDA5 through the CARDs (N-MDA5), but 14-3-3η was the only isoform that could enhance MDA5-dependent IFNβ promoter activities in a dose-dependent manner. Knock-down of 14-3-3η in Huh7 cells impaired and delayed the kinetics of MDA5 oligomerization, which is a critical step for MDA5 activation. Consequently, the MDA5-dependent IFNβ promoter activities as well as IFNβ mRNA expression level were also decreased in the 14-3-3η knocked-down cells. We also demonstrated that 14-3-3η is essential in boosting the activation of MDA5-dependent antiviral innate immunity during viral infections. In conclusion, our results uncover a novel function of 14-3-3η to promote the MDA5-dependent IFNβ induction pathway by reducing the immunostimulatory potential of viral dsRNA within MDA5 activation signaling pathway. In this study, we utilized biochemistry and molecular biology approaches to defines the molecular mechanisms by which melanoma differentiation-associated protein 5 (MDA5), a cytoplasmic RNA helicase and pattern recognition receptor molecule, is regulated by 14-3-3η to govern its innate immune signaling activity. During viral infection RIG-I-like receptors (RLRs), including MDA5, play essential roles in initiating type I interferon signaling pathway and preventing virus infection or replication in host cells. Besides, the establishment of well functional adaptive immune response to viruses is depending on the timely activation of innate immune antiviral signaling pathway. Our results suggested that the activation of MDA5 is promoted by the chaperone protein 14-3-3η. The lack of 14-3-3η in host cells leads to the kinetically-delayed oligomerization of MDA5, which is a key steps of the activation of MDA5-mediated anti-viral signaling pathway. These findings reveal a novel component which participating in the control system of MDA5-dependent signaling pathway. Viral proteins which antagonize 14-3-3η to impair MDA5-dependent antiviral signaling may be suitable targets for antiviral therapy or be modified to generate potential vaccine strains.
Collapse
Affiliation(s)
- Jhih-Pu Lin
- Graduate Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei City, Taiwan
- Department of Laboratory Medicine, National Taiwan University Hospital, Taipei City, Taiwan
| | - Yu-Kuan Fan
- Graduate Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei City, Taiwan
| | - Helene Minyi Liu
- Graduate Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei City, Taiwan
- * E-mail:
| |
Collapse
|
28
|
Non-canonical BAD activity regulates breast cancer cell and tumor growth via 14-3-3 binding and mitochondrial metabolism. Oncogene 2019; 38:3325-3339. [PMID: 30635657 PMCID: PMC6756016 DOI: 10.1038/s41388-018-0673-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 11/05/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023]
Abstract
The Bcl-2-associated death promoter BAD is a prognostic indicator for good clinical outcome of breast cancer patients; however, whether BAD affects breast cancer biology is unknown. Here we showed that BAD increased cell growth in breast cancer cells through two distinct mechanisms. Phosphorylation of BAD at S118 increased S99 phosphorylation, 14-3-3 binding and AKT activation to promote growth and survival. Through a second, more prominent pathway, BAD stimulated mitochondrial oxygen consumption in a novel manner that was downstream of substrate entry into the mitochondria. BAD stimulated complex I activity that facilitated enhanced cell growth and sensitized cells to apoptosis in response to complex I blockade. We propose that this dependence on oxidative metabolism generated large but nonaggressive cancers. This model identifies a non-canonical role for BAD and reconciles BAD-mediated tumor growth with favorable outcomes in BAD-high breast cancer patients.
Collapse
|
29
|
Discovery of a small-molecule inhibitor of specific serine residue BAD phosphorylation. Proc Natl Acad Sci U S A 2018; 115:E10505-E10514. [PMID: 30309962 DOI: 10.1073/pnas.1804897115] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Human BCL-2-associated death promoter (hBAD) is an apoptosis-regulatory protein mediating survival signals to carcinoma cells upon phosphorylation of Ser99, among other residues. Herein, we screened multiple small-molecule databases queried in a Laplacian-modified naive Bayesian-based cheminformatics platform and identified a Petasis reaction product as a site-specific inhibitor for hBAD phosphorylation. Based on apoptotic efficacy against mammary carcinoma cells, N-cyclopentyl-3-((4-(2,3-dichlorophenyl) piperazin-1-yl) (2-hydroxyphenyl) methyl) benzamide (NPB) was identified as a potential lead compound. In vitro biochemical analyses demonstrated that NPB inhibited the phosphorylation of hBAD specifically on Ser99. NPB was observed to exert this effect independently of AKT and other kinase activities despite the demonstration of AKT-mediated BAD-Ser99 phosphorylation. Using a structure-based bioinformatics platform, we observed that NPB exhibited predicted interactions with hBAD in silico and verified the same by direct binding kinetics. NPB reduced phosphorylation of BAD-Ser99 and enhanced caspase 3/7 activity with associated loss of cell viability in various human cancer cell lines derived from mammary, endometrial, ovarian, hepatocellular, colon, prostatic, and pancreatic carcinoma. Furthermore, by use of a xenograft model, it was observed that NPB, as a single agent, markedly diminished BAD phosphorylation in tumor tissue and significantly inhibited tumor growth. Similar doses of NPB utilized in acute toxicity studies in mice did not exhibit significant effects. Hence, we report a site-specific inhibitor of BAD phosphorylation with efficacy in tumor models.
Collapse
|
30
|
Pramipexole and Fingolimod exert neuroprotection in a mouse model of Parkinson's disease by activation of sphingosine kinase 1 and Akt kinase. Neuropharmacology 2018; 135:139-150. [DOI: 10.1016/j.neuropharm.2018.02.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 02/14/2018] [Accepted: 02/22/2018] [Indexed: 12/14/2022]
|
31
|
Wang X, Ha T, Hu Y, Lu C, Liu L, Zhang X, Kao R, Kalbfleisch J, Williams D, Li C. MicroRNA-214 protects against hypoxia/reoxygenation induced cell damage and myocardial ischemia/reperfusion injury via suppression of PTEN and Bim1 expression. Oncotarget 2018; 7:86926-86936. [PMID: 27894079 PMCID: PMC5349964 DOI: 10.18632/oncotarget.13494] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 10/28/2016] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Myocardial apoptosis plays an important role in myocardial ischemia/reperfusion (I/R) injury. Activation of PI3K/Akt signaling protects the myocardium from I/R injury. This study investigated the role of miR-214 in hypoxia/reoxygenation (H/R)-induced cell damage in vitro and myocardial I/R injury in vivo. METHODS AND RESULTS H9C2 cardiomyoblasts were transfected with lentivirus expressing miR-214 (LmiR-214) or lentivirus expressing scrambled miR-control (LmiR-control) respectively, to establish cell lines of LmiR-214 and LmiR-control. The cells were subjected to hypoxia for 4 h followed by reoxygenation for 24 h. Transfection of LmiR-214 suppresses PTEN expression, significantly increases the levels of Akt phosphorylation, markedly attenuates LDH release, and enhances the viability of the cells subjected to H/R. In vivo transfection of mouse hearts with LmiR-214 significantly attenuates I/R induced cardiac dysfunction and reduces I/R-induced myocardial infarct size. LmiR-214 transfection significantly attenuates I/R-induced myocardial apoptosis and caspase-3/7 and caspase-8 activity. Increased expression of miR-214 by transfection of LmiR-214 suppresses PTEN expression, increases the levels of phosphorylated Akt, represses Bim1 expression and induces Bad phosphorylation in the myocardium. In addition, in vitro data shows transfection of miR-214 mimics to H9C2 cells suppresses the expression and translocation of Bim1 from cytosol to mitochondria and induces Bad phosphorylation. CONCLUSIONS Our in vitro and in vivo data suggests that miR-214 protects cells from H/R induced damage and attenuates I/R induced myocardial injury. The mechanisms involve activation of PI3K/Akt signaling by targeting PTEN expression, induction of Bad phosphorylation, and suppression of Bim1 expression, resulting in decreases in I/R-induced myocardial apoptosis.
Collapse
Affiliation(s)
- Xiaohui Wang
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Tuanzhu Ha
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Center of Excellence for Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Yuanping Hu
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Chen Lu
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Li Liu
- Department of Geriatrics, First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Xia Zhang
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Race Kao
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Center of Excellence for Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - John Kalbfleisch
- Department of Biometry and Medical Computing, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Center of Excellence for Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - David Williams
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Center of Excellence for Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Chuanfu Li
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Center of Excellence for Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| |
Collapse
|
32
|
Bad phosphorylation as a target of inhibition in oncology. Cancer Lett 2017; 415:177-186. [PMID: 29175460 DOI: 10.1016/j.canlet.2017.11.017] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/13/2017] [Accepted: 11/17/2017] [Indexed: 12/19/2022]
Abstract
Bcl-2 agonist of cell death (BAD) is a BH3-only member of the Bcl-2 family which possesses important regulatory function in apoptosis. BAD has also been shown to possess many non-apoptotic functions closely linked to cancer including regulation of glycolysis, autophagy, cell cycle progression and immune system development. Interestingly, BAD can be either pro-apoptotic or pro-survival depending on the phosphorylation state of three specific serine residues (human S75, S99 and S118). Expression of BAD and BAD phosphorylation patterns have been shown to influence tumor initiation and progression and play a predictive role in disease prognosis, drug response and chemosensitivity in various cancers. This review aims to summarize the current evidence on the functional role of BAD phosphorylation in human cancer and evaluate the potential utility of modulating BAD phosphorylation in cancer.
Collapse
|
33
|
Madhunapantula SV, Robertson GP. Targeting protein kinase-b3 (akt3) signaling in melanoma. Expert Opin Ther Targets 2017; 21:273-290. [PMID: 28064546 DOI: 10.1080/14728222.2017.1279147] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Deregulated Akt activity leading to apoptosis inhibition, enhanced proliferation and drug resistance has been shown to be responsible for 35-70% of advanced metastatic melanomas. Of the three isoforms, the majority of melanomas have elevated Akt3 expression and activity. Hence, potent inhibitors targeting Akt are urgently required, which is possible only if (a) the factors responsible for the failure of Akt inhibitors in clinical trials is known; and (b) the information pertaining to synergistically acting targeted therapeutics is available. Areas covered: This review provides a brief introduction of the PI3K-Akt signaling pathway and its role in melanoma development. In addition, the functional role of key Akt pathway members such as PRAS40, GSK3 kinases, WEE1 kinase in melanoma development are discussed together with strategies to modulate these targets. Efficacy and safety of Akt inhibitors is also discussed. Finally, the mechanism(s) through which Akt leads to drug resistance is discussed in this expert opinion review. Expert opinion: Even though Akt play key roles in melanoma tumor progression, cell survival and drug resistance, many gaps still exist that require further understanding of Akt functions, especially in the (a) metastatic spread; (b) circulating melanoma cells survival; and
Collapse
Affiliation(s)
- SubbaRao V Madhunapantula
- a Center of Excellence in Molecular Biology and Regenerative Medicine (CEMR), Department of Biochemistry , JSS Medical College, Jagadguru Sri Shivarathreeshwara University (Accredited 'A' Grade by NAAC and Ranked 35 by National Institutional Ranking Framework (NIRF)-2015, Ministry of Human Resource Development, Government of India) , Mysuru , India
| | - Gavin P Robertson
- b Department of Pharmacology , The Pennsylvania State University College of Medicine , Hershey , PA , USA.,c Department of Pathology , The Pennsylvania State University College of Medicine , Hershey , PA , USA.,d Department of Dermatology , The Pennsylvania State University College of Medicine , Hershey , PA , USA.,e Department of Surgery , The Pennsylvania State University College of Medicine , Hershey , PA , USA.,f The Melanoma Center , The Pennsylvania State University College of Medicine , Hershey , PA , USA.,g The Melanoma Therapeutics Program , The Pennsylvania State University College of Medicine , Hershey , PA , USA
| |
Collapse
|
34
|
Park S, Fudhaili A, Oh SS, Lee KW, Madhi H, Kim DH, Yoo J, Ryu HW, Park KH, Kim KD. Cytotoxic effects of kazinol A derived from Broussonetia papyrifera on human bladder cancer cells, T24 and T24R2. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2016; 23:1462-1468. [PMID: 27765366 DOI: 10.1016/j.phymed.2016.08.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 07/21/2016] [Accepted: 08/20/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Broussonetia papyrifera (B. papyrifera), also known as paper mulberry, has been used as a traditional medicine for the treatment of several diseases, including ophthalmic disorders and impotency. However, the biological activity of kazinol A (1) among flavonols isolated from B. papyrifera has not been identified. PURPOSE We identified a candidate metabolite for anti-human bladder cancer treatment from B. papyrifera and investigated the possible molecular mechanisms underlying its cytotoxic effects in T24 and cisplatin-resistant T24R2 human bladder cancer cells. METHODS T24 and T24R2 cells were treated with five flavonols from B. papyrifera and their cytotoxic effects were determined using MTT assay, cell cycle analysis, mitochondrial membrane potential, and propidium iodide staining. Autophagy rate was calculated by counting LC3-GFP dots in the cells. All related protein expressions were analyzed by immunoblotting. RESULTS Compound 1 showed relatively higher cytotoxicity in the human bladder cancer cells, T24 and T24R2, rather than other tissues-originated cancer cells. Compound 1 significantly attenuated cell growth through G0/1 arrest mediated by a decrease in cyclin D1 and an increase of p21. Apoptosis and autophagy induced by compound 1 treatment was accompanied by a modulation of the AKT-BAD pathway and AMPK-mTOR pathway, respectively. CONCLUSIONS Our results suggest that compound 1 induces cytotoxic effects in human bladder cancer cells, including the cisplatin-resistant T24R2. Compound 1 may be a candidate for the development of effective anti-cancer drug on human urinary bladder cancer.
Collapse
Affiliation(s)
- Soojong Park
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Ahmad Fudhaili
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Sang-Seok Oh
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Ki Won Lee
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Hamadi Madhi
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Dong-Hee Kim
- Department of Orthopaedic Surgery, School of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - Jiyun Yoo
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Hyung Won Ryu
- Natural Medicine Research Center, KRIBB, 30-Yeongudanji-ro, Ochang-eup, Cheongwon 363-883, Republic of Korea
| | - Ki-Hun Park
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Kwang Dong Kim
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea; PMBBRC, Gyeongsang National University, Jinju, Republic of Korea.
| |
Collapse
|
35
|
Lee JS, Tang SS, Ortiz V, Vo TT, Fruman DA. MCL-1-independent mechanisms of synergy between dual PI3K/mTOR and BCL-2 inhibition in diffuse large B cell lymphoma. Oncotarget 2016; 6:35202-17. [PMID: 26460954 PMCID: PMC4742099 DOI: 10.18632/oncotarget.6051] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 09/24/2015] [Indexed: 11/25/2022] Open
Abstract
The PI3K/AKT/mTOR axis promotes survival and is a frequently mutated pathway in cancer. Yet, inhibitors targeting this pathway are insufficient to induce cancer cell death as single agents in some contexts, including diffuse large B cell lymphoma (DLBCL). In these situations, combinations with inhibitors targeting BCL-2 survival proteins (ABT-199 and ABT-263) may hold potential. Indeed, studies have demonstrated marked synergy in contexts where PI3K/mTOR inhibitors suppress expression of the pro-survival protein, MCL-1. In this study, we use BH3 profiling to confirm that BCL-2 and BCL-XL support survival following PI3K pathway inhibition, and that the dual PI3K/mTOR inhibitor BEZ235 strongly synergizes with BCL-2 antagonists in DLBCL. However, we identify an alternative mechanism of synergy between PI3K/mTOR and BCL-2 inhibitors, independent of MCL-1 down-regulation. Instead, we show that suppression of AKT activation by BEZ235 can induce the mitochondrial accumulation of pro-apoptotic BAD and BIM, and that expression of a constitutively active form of AKT prevents sensitization to BCL-2 antagonism. Thus, our work identifies an additional mechanism of synergy between PI3K pathway inhibitors and BCL-2 antagonists that strengthens the rationale for testing this combination in DLBCL.
Collapse
Affiliation(s)
- J Scott Lee
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - Sarah S Tang
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - Veronica Ortiz
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - Thanh-Trang Vo
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - David A Fruman
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| |
Collapse
|
36
|
Abstract
In vertebrates, 14-3-3 proteins form a family of seven highly conserved isoforms with chaperone activity, which bind phosphorylated substrates mostly involved in regulatory and checkpoint pathways. 14-3-3 proteins are the most abundant protein in the brain and are abundantly found in the cerebrospinal fluid in neurodegenerative diseases, suggesting a critical role in neuron physiology and death. Here we show that 14-3-3eta-deficient mice displayed auditory impairment accompanied by cochlear hair cells' degeneration. We show that 14-3-3eta is highly expressed in the outer and inner hair cells, spiral ganglion neurons of cochlea and retinal ganglion cells. Screening of YWHAH, the gene encoding the 14-3-3eta isoform, in non-syndromic and syndromic deafness, revealed seven non-synonymous variants never reported before. Among them, two were predicted to be damaging in families with syndromic deafness. In vitro, variants of YWHAH induce mild mitochondrial fragmentation and severe susceptibility to apoptosis, in agreement with a reduced capacity of mutated 14-3-3eta to bind the pro-apoptotic Bad protein. This study demonstrates that YWHAH variants can have a substantial effect on 14-3-3eta function and that 14-3-3eta could be a critical factor in the survival of outer hair cells.
Collapse
|
37
|
Sexual Differences in Cell Loss during the Post-Hatch Development of Song Control Nuclei in the Bengalese Finch. PLoS One 2015; 10:e0125802. [PMID: 25938674 PMCID: PMC4418719 DOI: 10.1371/journal.pone.0125802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 02/26/2015] [Indexed: 11/21/2022] Open
Abstract
Birdsongs and the regions of their brain that control song exhibit obvious sexual differences. However, the mechanisms underlying these sexual dimorphisms remain unknown. To address this issue, we first examined apoptotic cells labeled with caspase-3 or TUNEL in Bengalese finch song control nuclei - the robust nucleus of the archopallium (RA), the lateral magnocellular nucleus of the anterior nidopallium (LMAN), the high vocal center (HVC) and Area X from post-hatch day (P) 15 to 120. Next, we investigated the expression dynamics of pro-apoptotic (Bid, Bad and Bax) and anti-apoptotic (Bcl-2 and Bcl-xL) genes in the aforementioned nuclei. Our results revealed that the female RA at P45 exhibited marked cell apoptosis, confirmed by low densities of Bcl-xL and Bcl-2. Both the male and female LMAN exhibited apoptotic peaks at P35 and P45, respectively, and the observed cell loss was more extensive in males. A corresponding sharp decrease in the density of Bcl-2 after P35 was observed in both sexes, and a greater density of Bid was noted at P45 in males. In addition, we observed that RA volume and the total number of BDNF-expressing cells decreased significantly after unilateral lesion of the LMAN or HVC (two areas that innervate the RA) and that greater numbers of RA-projecting cells were immunoreactive for BDNF in the LMAN than in the HVC. We reasoned that a decrease in the amount of BDNF transported via HVC afferent fibers might result in an increase in cell apoptosis in the female RA. Our data indicate that cell apoptosis resulting from different pro- and anti-apoptotic agents is involved in generating the differences between male and female song control nuclei.
Collapse
|
38
|
Chu LY, Liou JY, Wu KK. Prostacyclin protects vascular integrity via PPAR/14-3-3 pathway. Prostaglandins Other Lipid Mediat 2015; 118-119:19-27. [PMID: 25910681 DOI: 10.1016/j.prostaglandins.2015.04.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/25/2015] [Accepted: 04/13/2015] [Indexed: 12/20/2022]
Abstract
Vascular integrity is protected by the lining endothelial cells (ECs) through structural and molecular protective mechanisms. In response to external stresses, ECs are dynamic in producing protective molecules such as prostacyclin (PGI2). PGI2 is known to inhibit platelet aggregation and controls smooth muscle cell contraction via IP receptors. Recent studies indicate that PGI2 defends endothelial survival and protects vascular smooth muscle cell from apoptosis via peroxisome-proliferator activated receptors (PPAR). PPAR activation results in 14-3-3 upregulation. Increase in cytosolic 14-3-3ɛ or 14-3-3β enhances binding and sequestration of Akt-mediated phosphorylated Bad and reduces Bad-mediated apoptosis via the mitochondrial pathway. Experimental data indicate that administration of PGI2 analogs or augmentation of PGI2 production by gene transfer attenuates endothelial damage and organ infarction caused by ischemia-reperfusion injury. The protective effect of PGI2 is attributed in part to preserving endothelial integrity.
Collapse
Affiliation(s)
- Ling-yun Chu
- Metabolomic Medicine Research Center, China Medical University, Taichung, Taiwan
| | - Jun-Yang Liou
- Metabolomic Medicine Research Center, China Medical University, Taichung, Taiwan; Institute of Cell and System Medicine, National Health Research Institute, Chunan, Taiwan
| | - Kenneth K Wu
- Metabolomic Medicine Research Center, China Medical University, Taichung, Taiwan; Institute of Cell and System Medicine, National Health Research Institute, Chunan, Taiwan; Department of Medical Sciences, National Tsing-Hua University, Hsin-chu, Taiwan.
| |
Collapse
|
39
|
Stankiewicz TR, Ramaswami SA, Bouchard RJ, Aktories K, Linseman DA. Neuronal apoptosis induced by selective inhibition of Rac GTPase versus global suppression of Rho family GTPases is mediated by alterations in distinct mitogen-activated protein kinase signaling cascades. J Biol Chem 2015; 290:9363-76. [PMID: 25666619 DOI: 10.1074/jbc.m114.575217] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Indexed: 12/11/2022] Open
Abstract
Rho family GTPases play integral roles in neuronal differentiation and survival. We have shown previously that Clostridium difficile toxin B (ToxB), an inhibitor of RhoA, Rac1, and Cdc42, induces apoptosis of cerebellar granule neurons (CGNs). In this study, we compared the effects of ToxB to a selective inhibitor of the Rac-specific guanine nucleotide exchange factors Tiam1 and Trio (NSC23766). In a manner similar to ToxB, selective inhibition of Rac induces CGN apoptosis associated with enhanced caspase-3 activation and reduced phosphorylation of the Rac effector p21-activated kinase. In contrast to ToxB, caspase inhibitors do not protect CGNs from targeted inhibition of Rac. Also dissimilar to ToxB, selective inhibition of Rac does not inhibit MEK1/2/ERK1/2 or activate JNK/c-Jun. Instead, targeted inhibition of Rac suppresses distinct MEK5/ERK5, p90Rsk, and Akt-dependent signaling cascades known to regulate the localization and expression of the Bcl-2 homology 3 domain-only protein Bad. Adenoviral expression of a constitutively active mutant of MEK5 is sufficient to attenuate neuronal cell death induced by selective inhibition of Rac with NSC23766 but not apoptosis induced by global inhibition of Rho GTPases with ToxB. Collectively, these data demonstrate that global suppression of Rho family GTPases with ToxB causes a loss of MEK1/2/ERK1/2 signaling and activation of JNK/c-Jun, resulting in diminished degradation and enhanced transcription of the Bcl-2 homology 3 domain-only protein Bim. In contrast, selective inhibition of Rac induces CGN apoptosis by repressing unique MEK5/ERK5, p90Rsk, and Akt-dependent prosurvival pathways, ultimately leading to enhanced expression, dephosphorylation, and mitochondrial localization of proapoptotic Bad.
Collapse
Affiliation(s)
- Trisha R Stankiewicz
- From the Research Service, Veterans Affairs Medical Center, Denver, Colorado 80220, the Department of Biological Sciences and Eleanor Roosevelt Institute, University of Denver, Denver, Colorado 80208
| | - Sai Anandi Ramaswami
- the Department of Biological Sciences and Eleanor Roosevelt Institute, University of Denver, Denver, Colorado 80208
| | - Ron J Bouchard
- From the Research Service, Veterans Affairs Medical Center, Denver, Colorado 80220
| | - Klaus Aktories
- the Institute for Experimental and Clinical Pharmacology and Toxicology, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany, and
| | - Daniel A Linseman
- From the Research Service, Veterans Affairs Medical Center, Denver, Colorado 80220, the Department of Biological Sciences and Eleanor Roosevelt Institute, University of Denver, Denver, Colorado 80208, the Division of Clinical Pharmacology and Toxicology, Department of Medicine and Neuroscience Program, University of Colorado Denver, Aurora, Colorado 80045
| |
Collapse
|
40
|
Bcl-2 family in inter-organelle modulation of calcium signaling; roles in bioenergetics and cell survival. J Bioenerg Biomembr 2014; 46:1-15. [PMID: 24078116 DOI: 10.1007/s10863-013-9527-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 08/27/2013] [Indexed: 01/01/2023]
Abstract
Bcl-2 family proteins, known for their apoptosis functioning at the mitochondria, have been shown to localize to other cellular compartments to mediate calcium (Ca2+) signals. Since the proper supply of Ca2+ in cells serves as an important mechanism for cellular survival and bioenergetics, we propose an integrating role for Bcl-2 family proteins in modulating Ca2+ signaling. The endoplasmic reticulum (ER) is the main Ca2+ storage for the cell and Bcl-2 family proteins competitively regulate its Ca2+ concentration. Bcl-2 family proteins also regulate the flux of Ca2+ from the ER by physically interacting with inositol 1,4,5-trisphosphate receptors (IP3Rs) to mediate their opening. Type 1 IP3Rs reside at the bulk ER to coordinate cytosolic Ca2+ signals, while type 3 IP3Rs reside at mitochondria-associated ER membrane (MAM) to facilitate mitochondrial Ca2+ uptake. In healthy cells, mitochondrial Ca2+ drives pyruvate into the citric acid (TCA) cycle to facilitate ATP production, while a continuous accumulation of Ca2+ can trigger the release of cytochrome c, thus initiating apoptosis. Since multiple organelles and Bcl-2 family proteins are involved in Ca2+ signaling, we aim to clarify the role that Bcl-2 family proteins play in facilitating Ca2+ signaling and how mitochondrial Ca2+ is relevant in both bioenergetics and apoptosis. We also explore how these insights could be useful in controlling bioenergetics in apoptosis-resistant cell lines.
Collapse
|
41
|
Li S, Dang YY, Oi Lam Che G, Kwan YW, Chan SW, Leung GPH, Lee SMY, Hoi MPM. VEGFR tyrosine kinase inhibitor II (VRI) induced vascular insufficiency in zebrafish as a model for studying vascular toxicity and vascular preservation. Toxicol Appl Pharmacol 2014; 280:408-20. [DOI: 10.1016/j.taap.2014.09.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 08/22/2014] [Accepted: 09/04/2014] [Indexed: 12/17/2022]
|
42
|
Shi Z, Park HR, Du Y, Li Z, Cheng K, Sun SY, Li Z, Fu H, Khuri FR. Cables1 complex couples survival signaling to the cell death machinery. Cancer Res 2014; 75:147-158. [PMID: 25361894 DOI: 10.1158/0008-5472.can-14-0036] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cables1 is a candidate tumor suppressor that negatively regulates cell growth by inhibiting cyclin-dependent kinases. Cables1 expression is lost frequently in human cancer but little is known about its regulation. Here, we report that Cables1 levels are controlled by a phosphorylation and 14-3-3-dependent mechanism. Mutagenic analyses identified two residues, T44 and T150, that are specifically critical for 14-3-3 binding and that serve as substrates for phosphorylation by the cell survival kinase Akt, which by binding directly to Cables1 recruits 14-3-3 to the complex. In cells, Cables1 overexpression induced apoptosis and inhibited cell growth in part by stabilizing p21 and decreasing Cdk2 kinase activity. Ectopic expression of activated Akt (AKT1) prevented Cables1-induced apoptosis. Clinically, levels of phosphorylated Cables1 and phosphorylated Akt correlated with each other in human lung cancer specimens, consistent with pathophysiologic significance. Together, our results illuminated a dynamic regulatory system through which activated Akt and 14-3-3 work directly together to neutralize a potent tumor suppressor function of Cables1.
Collapse
Affiliation(s)
- Zhi Shi
- Department of Cell Biology & Institute of Biomedicine, College of Life Science and Technology, Jinan University, Guangzhou, China.,Department of Pharmacology, Emory University, Atlanta, Georgia 30322
| | - Hae Ryon Park
- Department of Pharmacology, Emory University, Atlanta, Georgia 30322.,Department of Oral Pathology, School of Dentistry, Pusan National University, Pusan, South Korea
| | - Yuhong Du
- Department of Pharmacology, Emory University, Atlanta, Georgia 30322.,Emory Chemical Biology Discovery Center, Emory University, Atlanta, Georgia 30322
| | - Zijian Li
- Department of Pharmacology, Emory University, Atlanta, Georgia 30322.,Institute of Vascular Medicine, Peking University Third Hospital, Beijing, China
| | - Kejun Cheng
- Department of Pharmacology, Emory University, Atlanta, Georgia 30322.,Chemical Biology Center, Lishui Institute of Agricultural Sciences, Lishui, China
| | - Shi-Yong Sun
- Department of Hematology & Medical Oncology and Winship Cancer Institute, Emory University, Atlanta, Georgia 30322
| | - Zenggang Li
- Department of Pharmacology, Emory University, Atlanta, Georgia 30322
| | - Haian Fu
- Department of Pharmacology, Emory University, Atlanta, Georgia 30322.,Department of Hematology & Medical Oncology and Winship Cancer Institute, Emory University, Atlanta, Georgia 30322.,Emory Chemical Biology Discovery Center, Emory University, Atlanta, Georgia 30322
| | - Fadlo R Khuri
- Department of Hematology & Medical Oncology and Winship Cancer Institute, Emory University, Atlanta, Georgia 30322.,Emory Chemical Biology Discovery Center, Emory University, Atlanta, Georgia 30322
| |
Collapse
|
43
|
BYL719, a selective inhibitor of phosphoinositide 3-Kinase α, enhances the effect of selumetinib (AZD6244, ARRY-142886) in KRAS-mutant non-small cell lung cancer. Invest New Drugs 2014; 33:12-21. [PMID: 25342139 DOI: 10.1007/s10637-014-0163-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 09/15/2014] [Indexed: 02/06/2023]
Abstract
PURPOSE KRAS is frequently mutated in non-small cell lung cancers (NSCLC), resulting in activation of the MEK/ERK pathway. Because there are currently no drugs that target oncogenic KRAS, MEK inhibitors have been tested clinically as a possible treatment option for patients with NSCLC. However, KRAS-mutant cancers exhibit resistance to MEK inhibitors. Therefore, a combinational strategy is necessary for effective therapy. To address this, we investigated the therapeutic effects of combining selumetinib, a MEK1/2 inhibitor, with BYL719, a PI3Kα inhibitor. METHODS We evaluated the effects of selumetinib and BYL719 in vitro and in vivo in NSCLC cell lines. RESULTS The combination of BYL719 and selumetinib resulted in synergistic cytotoxic activity compared with the single agents alone in KRAS-mutant NSCLC cells. At the molecular level, we found that AKT activation strongly influenced the sensitivity of KRAS-mutant NSCLC cells to selumetinib. Selumetinib upregulated phospho-AKT and phosphorylated BAD at ser136, which is responsible for intrinsic drug resistance in KRAS-mutant NSCLC cells. In contrast, inhibition of the PI3K/AKT pathway by BYL719 hindered selumetinib-induced BAD phosphorylation and increased the antitumor efficacy of selumetinib. Furthermore, selumetinib and BYL719 combination therapy showed synergy in the suppression of A549 xenograft tumor growth. On analysis of the pharmacodynamics, selumetinib and BYL719 together resulted in effective inhibition of both p-ERK and p-AKT expression in tumor tissue. CONCLUSION Taken together, these data suggest that combination treatment with selumetinib and BYL719 is a promising therapeutic approach to overcoming resistance to MEK inhibitors.
Collapse
|
44
|
Liu D, Yi B, Liao Z, Tang L, Yin D, Zeng S, Yao J, He M. 14-3-3γ protein attenuates lipopolysaccharide-induced cardiomyocytes injury through the Bcl-2 family/mitochondria pathway. Int Immunopharmacol 2014; 21:509-15. [PMID: 24957688 DOI: 10.1016/j.intimp.2014.06.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 06/08/2014] [Accepted: 06/09/2014] [Indexed: 10/25/2022]
Abstract
Previous studies have indicated that 14-3-3γ is upregulated by stress in LPS-induced cardiovascular injury. In this study, we investigated the interaction of 14-3-3γ and Bcl-2 family members in the control of the mitochondrial permeability transition (MPT) to test the hypothesis that abundant levels of 14-3-3γ can protect against LPS-induced injury via a Bcl-2 family/mitochondria pathway. The cardiomyocytes were treated with LPS (1mg l(-1)) for 6h; the interaction between 14-3-3γ and phospho-Bad(S112) was detected by co-immunoprecipitation (co-IP); the levels of Bcl-2 family members in the cytosolic and mitochondrial fractions were examined by Western blot; the apoptosis and mitochondrial membrane potential (ΔΨm) were detected by flow cytometry; and the mitochondrial permeability transition pore (mPTP) opening was tested by mitochondrial swelling. Our results revealed that LPS treatment results in cardiomyocyte injury, and these effects were significantly attenuated by pFLAG-14-3-3γ. Moreover, LPS treatment induced Bax translocation to the mitochondria, ΔΨm loss, mitochondrial swelling, and cytochrome c release, and pFLAG-14-3-3γ reversed these effects induced by LPS. Moreover, overexpressed 14-3-3γ protein could assist Bad(S112) phosphorylation and interact with it to form a complex, which might result in the disassociation of Bcl-2 from the Bad/Bcl-2 complex and its translocation from the cytosol to the mitochondria. Our data firstly confirmed that a high level of 14-3-3γ protects against LPS-induced cardiomyocyte injury likely through a pathway associated with the regulation of the subcellular localizations of Bcl-2 and Bad that results in the prevention of mPTP opening, the maintenance of ΔΨm, and ultimately the inhibition of apoptosis.
Collapse
Affiliation(s)
- Dan Liu
- Jiangxi Provincial Institute of Hypertension, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China; Jiangxi Provincial Key Laboratory of Basic Pharmacology, Nanchang University School of Pharmaceutical Science, Nanchang 330006, PR China
| | - Bo Yi
- 2nd Abdominal Surgery Department of JiangXi province tumor Hospital,Nanchang 330029, PR China
| | - Zhangping Liao
- Jiangxi Provincial Key Laboratory of Basic Pharmacology, Nanchang University School of Pharmaceutical Science, Nanchang 330006, PR China
| | - Lei Tang
- Jiangxi Provincial Key Laboratory of Basic Pharmacology, Nanchang University School of Pharmaceutical Science, Nanchang 330006, PR China
| | - Dong Yin
- Jiangxi Provincial Key Laboratory of Molecular Medicine, The Second Affiliated Hospital, Nanchang University, Nanchang 330006, PR China
| | - Shu Zeng
- Jiangxi Provincial Key Laboratory of Basic Pharmacology, Nanchang University School of Pharmaceutical Science, Nanchang 330006, PR China
| | - Jianguo Yao
- Jiangxi Provincial Key Laboratory of Basic Pharmacology, Nanchang University School of Pharmaceutical Science, Nanchang 330006, PR China
| | - Ming He
- Jiangxi Provincial Institute of Hypertension, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China; Jiangxi Provincial Key Laboratory of Basic Pharmacology, Nanchang University School of Pharmaceutical Science, Nanchang 330006, PR China.
| |
Collapse
|
45
|
Song X, Dilly AK, Kim SY, Choudry HA, Lee YJ. Rapamycin-enhanced mitomycin C-induced apoptotic death is mediated through the S6K1-Bad-Bak pathway in peritoneal carcinomatosis. Cell Death Dis 2014; 5:e1281. [PMID: 24901052 PMCID: PMC4607229 DOI: 10.1038/cddis.2014.242] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/29/2014] [Accepted: 05/05/2014] [Indexed: 12/15/2022]
Abstract
Peritoneal carcinomatosis (PC) is the most common secondary cancerous disease, and more effective novel regimens are needed. In this study, we identified a novel combination treatment for PC, chemotherapeutic agent mitomycin C in combination with mTOR (mammalian target of rapamycin) inhibitor rapamycin. We observed that the combination of mitomycin C and rapamycin induced synergistic cytotoxicity and apoptosis, which was mediated through an increase in caspase activation. The combination of mitomycin C and rapamycin inactivated p70 S6 ribosomal kinase (S6K1) and dephosphorylated Bad, leading to dissociation of Bcl-xL from Bak, which resulted in Bak oligomerization, mitochondria dysfunction and cytochrome c release. PF-4708671, a S6K1-specific inhibitor, enhanced the combination treatment-induced apoptosis, whereas S6K1 E389 DeltaCT-HA (S6K1 active form) dramatically decreased the induction of apoptosis. In addition, the combination treatment significantly inhibited LS174T intraperitoneal tumor growth in vivo. This study provides a preclinical rationale for apoptosis induction linked with the mTOR pathway through a combination of chemotherapeutic agents and mTOR inhibitor, and will support this combinatorial strategy to PC patients.
Collapse
Affiliation(s)
- X Song
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - A-K Dilly
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - S-Y Kim
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - H A Choudry
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Y J Lee
- 1] Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA [2] Department of Pharmacology & Chemical Biology, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| |
Collapse
|
46
|
Li G, Liu L, Shan C, Cheng Q, Budhraja A, Zhou T, Cui H, Gao N. RhoA/ROCK/PTEN signaling is involved in AT-101-mediated apoptosis in human leukemia cells in vitro and in vivo. Cell Death Dis 2014; 5:e998. [PMID: 24434521 PMCID: PMC4040709 DOI: 10.1038/cddis.2013.519] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 11/11/2013] [Accepted: 11/25/2013] [Indexed: 12/22/2022]
Abstract
R-(-)-gossypol acetic acid (AT-101) is a natural cottonseed product that exhibits anticancer activity. However, the molecular mechanism behind the antileukemic activity of AT-101 has not been well characterized. In this study, we investigated how AT-101 induces apoptosis in human leukemia cells. Exposure to AT-101 significantly increased apoptosis in both human leukemia cell lines and primary human leukemia cells. This increase was accompanied by the activation of caspases, cytochrome c release, Bcl2-associated X protein (Bax) translocation, myeloid cell leukemia-1 (Mcl-1) downregulation, Bcl-2-associated death promoter (Bad) dephosphorylation, Akt inactivation, and RhoA/Rho-associated coiled-coil containing protein kinase 1/phosphatase and tensin homolog (RhoA/ROCK1/PTEN) activation. RhoA, rather than caspase-3 cleavage, mediated the cleavage/activation of ROCK1 that AT-101 induced. Inhibiting RhoA and ROCK1 activation by C3 exoenzyme (C3) and Y27632, respectively, attenuated the ROCK1 cleavage/activation, PTEN activity, Akt inactivation, Mcl-1 downregulation, Bad dephosphorylation, and apoptosis mediated by AT-101. Knocking down ROCK1 expression using a ROCK1-specific siRNA also significantly abrogated AT-101-mediated apoptosis. Constitutively active Akt prevented the AT-101-induced Mcl-1 downregulation, Bad dephosphorylation, and apoptosis. Conversely, AT-101 lethality was potentiated by the phosphatidylinositol 3-kinase inhibitor LY294002. In vivo, the tumor growth inhibition caused by AT-101 was also associated with RhoA/ROCK1/PTEN activation and Akt inactivation in a mouse leukemia xenograft model. Collectively, these findings suggest that AT-101 may preferentially induce apoptosis in leukemia cells by interrupting the RhoA/ROCK1/PTEN pathway, leading to Akt inactivation, Mcl-1 downregulation, Bad dephosphorylation, and Bax translocation, which culminate in mitochondrial injury and apoptosis.
Collapse
Affiliation(s)
- G Li
- Department of Pharmacognosy, College of Pharmacy, Third Military Medical University, Chongqing, China
| | - L Liu
- Department of Pharmacognosy, College of Pharmacy, Third Military Medical University, Chongqing, China
| | - C Shan
- Department of Pharmacognosy, College of Pharmacy, Third Military Medical University, Chongqing, China
| | - Q Cheng
- Department of Pharmacognosy, College of Pharmacy, Third Military Medical University, Chongqing, China
| | - A Budhraja
- Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - T Zhou
- Department of Pharmacognosy, College of Pharmacy, Third Military Medical University, Chongqing, China
| | - H Cui
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - N Gao
- Department of Pharmacognosy, College of Pharmacy, Third Military Medical University, Chongqing, China
| |
Collapse
|
47
|
Liu H, Liu YZ, Zhang F, Wang HS, Zhang G, Zhou BH, Zuo YL, Cai SH, Bu XZ, Du J. Identification of potential pathways involved in the induction of cell cycle arrest and apoptosis by a new 4-arylidene curcumin analogue T63 in lung cancer cells: a comparative proteomic analysis. MOLECULAR BIOSYSTEMS 2014; 10:1320-31. [DOI: 10.1039/c3mb70553f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
48
|
Kleppe R, Ghorbani S, Martinez A, Haavik J. Modelling cellular signal communication mediated by phosphorylation dependent interaction with 14-3-3 proteins. FEBS Lett 2013; 588:92-8. [DOI: 10.1016/j.febslet.2013.11.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 11/08/2013] [Accepted: 11/12/2013] [Indexed: 11/25/2022]
|
49
|
Du Y, Fu RW, Lou B, Zhao J, Qui M, Khuri FR, Fu H. A time-resolved fluorescence resonance energy transfer assay for high-throughput screening of 14-3-3 protein-protein interaction inhibitors. Assay Drug Dev Technol 2013; 11:367-81. [PMID: 23906346 DOI: 10.1089/adt.2013.507] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Protein-protein interaction networks mediate diverse biological processes by regulating various signaling hubs and clusters. 14-3-3 proteins, a family of phosphoserine/threonine-binding molecules, serve as major interaction hubs in eukaryotic cells and have emerged as promising therapeutic targets for various human diseases. In order to identify chemical probes for mechanistic studies and for potential therapeutic development, we have developed highly sensitive bioassays to monitor the interaction of 14-3-3 with a client protein. In this study, we describe a homogenous time-resolved fluorescence resonance energy transfer (TR-FRET) assay to detect the interaction of 14-3-3 with Bad, a proapoptotic member of the Bcl-2 family. Through a series of titration studies in which europium-labeled 14-3-3 serves as an FRET donor and a Dy647-labeled phosphorylated Bad, the peptide acts as an FRET acceptor, we have achieved a robust TR-FRET assay that is suitable for high-throughput screening (HTS) with an excellent signal-to-background ratio of >20 and Z' values >0.7. This assay was further miniaturized to a 1,536-well format for ultra-HTS (uHTS), and exhibited a similar robust performance. The utility and performance of the assay for uHTS were validated by (i) known inhibitors, including peptide R18 and small molecule FOBISIN101, and (ii) screening of a 51,200 compound library. This simple and robust assay is generally applicable to detect the interaction of 14-3-3 with other client proteins. It provides a sensitive and easy-to-use tool to facilitate the discovery of 14-3-3 protein inhibitors as well as to study 14-3-3-mediated protein-protein interactions.
Collapse
Affiliation(s)
- Yuhong Du
- Department of Pharmacology and Emory Chemical Biology Discovery Center, Emory University School of Medicine, Atlanta, GA 30322, USA.
| | | | | | | | | | | | | |
Collapse
|
50
|
Lim GE, Piske M, Johnson JD. 14-3-3 proteins are essential signalling hubs for beta cell survival. Diabetologia 2013; 56:825-37. [PMID: 23354124 DOI: 10.1007/s00125-012-2820-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 12/11/2012] [Indexed: 11/27/2022]
Abstract
AIMS/HYPOTHESIS Diabetes is characterised by pancreatic beta cell death and dysfunction, resulting from unbalanced pro-survival and pro-death signalling. The 14-3-3 proteins are molecular adaptors that integrate numerous signalling pathways, including the v-raf-leukaemia viral oncogene 1 (RAF1)/B cell leukaemia/lymphoma 2 (BCL-2)-associated agonist of cell death (BAD) pathway, which we have previously implicated in insulin-dependent beta cell survival. Nevertheless, the roles of 14-3-3 proteins in beta cell fate and function have not been investigated. METHODS We examined the abundance, localisation, modulation and roles of 14-3-3 proteins using quantitative RT-PCR, immunoblot or imaging. MIN6 cells or mouse islets cells were manipulated with inhibitors, short interfering RNA (siRNA) or plasmids overexpressing 14-3-3. RESULTS We first characterised the abundance and subcellular location of all seven 14-3-3 isoforms in mouse and human beta cells. Most isoforms were cytoplasmic, except 14-3-3σ, which appeared to be nuclear. Analysis of 14-3-3 abundance under stress conditions revealed distinct modulation in mouse islets and MIN6 cells. Generalised 14-3-3 inhibition promoted apoptosis and dysfunction, and siRNA-mediated knockdown revealed isoform-specific roles in caspase-3-dependent beta cell apoptosis, with a clear role for 14-3-3ζ. Overabundance of 14-3-3ζ sequestered BAD-BCL2-associated X protein (BAX) from mitochondria, attenuated Dp5 (also known as Hrk) and Puma (also known as Bbc3) induction, and increased survival in response to pro-inflammatory cytokines or thapsigargin. Anti-apoptotic insulin treatment increased the sequestration of BAD/BAX by 14-3-3ζ. BAD mutants that were unable to bind 14-3-3ζ localised to mitochondria and induced apoptosis. CONCLUSIONS/INTERPRETATION This first study of the 14-3-3 family in beta cells revealed specific regulation, localisation and anti-apoptotic roles among the isoforms. Focus on 14-3-3ζ revealed its importance in preventing BAD-BAX mitochondrial localisation and protecting beta cells from multiple stresses. Thus, some 14-3-3 proteins are pro-survival signalling hubs.
Collapse
Affiliation(s)
- G E Lim
- Diabetes Research Group, Department of Cellular and Physiological Sciences, University of British Columbia, 5358 Life Sciences Building, 2350 Health Sciences Mall, Vancouver, BC, Canada V6T 1Z3
| | | | | |
Collapse
|