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Rahman S, Patel RK, Boden E, Tsikitis VL. Medical Management of Inflammatory Bowel Disease. Surg Clin North Am 2024; 104:657-671. [PMID: 38677828 DOI: 10.1016/j.suc.2023.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2024]
Abstract
The past few decades have seen significant advancements in the medical management of both ulcerative colitis (UC) and Crohn's disease (CD). The previous dependence on steroids is no longer an acceptable strategy following the Food and Drug Administration approval for several new classes of medication. These medications include aminosalicylates, immunomodulators, biologics, and oral targeted small-molecule inhibitors. This article highlights several key trials and discusses modern treatment paradigms for both UC and CD based on disease severity.
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Affiliation(s)
- Shahrose Rahman
- Department of Surgery, Oregon Health & Science University, 3181 Southwest Sam Jackson Park Road, Mail Code: L223, Portland, OR 97239, USA.
| | - Ranish K Patel
- Department of Surgery, Oregon Health & Science University, 3181 Southwest Sam Jackson Park Road, Mail Code: L223, Portland, OR 97239, USA
| | - Elisa Boden
- Division of Gastroenterology and Hepatology, Department of Medicine, Oregon Health & Science University, 3161 Southwest Pavilion Loop, L461, Portland, OR 97239-3098, USA
| | - Vassiliki Liana Tsikitis
- Department of Surgery, Oregon Health & Science University, 3181 Southwest Sam Jackson Park Road, Mail Code: L223, Portland, OR 97239, USA
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2
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Li L, Guo B, Dai L, Liu C, Lin Z. Ebselen and TPI-1, as RecG helicase inhibitors, potently enhance the susceptibility of Pseudomonas aeruginosa to DNA damage agents. Biochem Pharmacol 2024; 222:116051. [PMID: 38354956 DOI: 10.1016/j.bcp.2024.116051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 02/08/2024] [Accepted: 02/08/2024] [Indexed: 02/16/2024]
Abstract
Holliday junction (HJ) is a four-way structured DNA intermediate in processes of homologous recombination and DNA double-stranded break (DSB) repair. In bacteria, HJs are processed via either the RuvABC or RecG-dependent pathways. In addition, RecG also plays a critical role in the reactivation of stalled replication forks, making it an attractive target for antibacterial drug development. Here, we conducted a high-throughput screening targeting the RecG helicase from a common opportunistic pathogen Pseudomonas aeruginosa (Pa). From a library containing 7920 compounds, we identified Ebselen and TPI-1 (2',5'-Dichloro-[1,1'-biphenyl]-2,5-dione) as two potent PaRecG inhibitors, with IC50 values of 0.31 ± 0.02 μM and 1.16 ± 0.06 μM, respectively. Further biochemical analyses suggested that both Ebselen and TPI-1 inhibited the ATPase activity of PaRecG, and hindered its binding to HJ DNA with high selectivity. These compounds, when combined with our previously reported RuvAB inhibitors, resulted in more severe DNA repair defects than the individual treatment, and potently enhanced the susceptibility of P. aeruginosa to the DNA damage agents. This work reports novel small molecule inhibitors of RecG, offering valuable chemical tools for advancing our understanding of RecG's function and mechanism. Additionally, these inhibitors might be further developed as promising antibacterial agents in the fight against P. aeruginosa infections.
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Affiliation(s)
- Longheng Li
- College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Binbin Guo
- College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Lin Dai
- College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Chun Liu
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China.
| | - Zhonghui Lin
- College of Chemistry, Fuzhou University, Fuzhou 350108, China.
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Awadasseid A, Wang R, Sun S, Zhang F, Wu Y, Zhang W. Small molecule and PROTAC molecule experiments in vitro and in vivo, focusing on mouse PD-L1 and human PD-L1 differences as targets. Biomed Pharmacother 2024; 172:116257. [PMID: 38350367 DOI: 10.1016/j.biopha.2024.116257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 01/20/2024] [Accepted: 02/06/2024] [Indexed: 02/15/2024] Open
Abstract
In recent years, several monoclonal antibodies (mAbs) targeting PD-L1 have been licensed by the FDA for use in the treatment of cancer, demonstrating the effectiveness of blocking immune checkpoints, particularly the PD-1/PD-L1 pathway. Although mAb-based therapies have made great strides, they still have their limitations, and new small-molecule or PROTAC-molecule inhibitors that can block the PD-1/PD-L1 axis are desperately needed. Therefore, it is crucial to translate initial in vitro discoveries into appropriate in vivo animal models when creating PD-L1-blocking therapies. Due to their widespread availability and low experimental expenses, classical immunocompetent mice are appealing for research purposes. However, it is yet unclear whether the mouse (m) PD-L1 interaction with human (h) PD-1 in vivo would produce a functional immunological checkpoint. In this review, we summarize the in vitro and in vivo experimental studies of small molecules and PROTAC molecules, particularly the distinctions between mPD-L1 as a target and hPD-L1 as a target.
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Affiliation(s)
- Annoor Awadasseid
- Lab of Chemical Biology and Molecular Drug Design, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Moganshan Institute ZJUT, Deqing 313202, China; Institute of Drug Development & Chemical Biology, Zhejiang University of Technology, Hangzhou 310014, China; Department of Biochemistry & Food Sciences, University of Kordofan, El-Obeid 51111, Sudan
| | - Rui Wang
- Lab of Chemical Biology and Molecular Drug Design, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Drug Development & Chemical Biology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Shishi Sun
- Lab of Chemical Biology and Molecular Drug Design, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Drug Development & Chemical Biology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Feng Zhang
- Lab of Chemical Biology and Molecular Drug Design, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Drug Development & Chemical Biology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yanling Wu
- Lab of Molecular Immunology, Virus Inspection Department, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China.
| | - Wen Zhang
- Lab of Chemical Biology and Molecular Drug Design, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Drug Development & Chemical Biology, Zhejiang University of Technology, Hangzhou 310014, China.
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4
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Srithanyarat T, Taoma K, Sutthibutpong T, Ruengjitchatchawalya M, Liangruksa M, Laomettachit T. Interpreting drug synergy in breast cancer with deep learning using target-protein inhibition profiles. BioData Min 2024; 17:8. [PMID: 38424554 PMCID: PMC10905801 DOI: 10.1186/s13040-024-00359-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 02/23/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND Breast cancer is the most common malignancy among women worldwide. Despite advances in treating breast cancer over the past decades, drug resistance and adverse effects remain challenging. Recent therapeutic progress has shifted toward using drug combinations for better treatment efficiency. However, with a growing number of potential small-molecule cancer inhibitors, in silico strategies to predict pharmacological synergy before experimental trials are required to compensate for time and cost restrictions. Many deep learning models have been previously proposed to predict the synergistic effects of drug combinations with high performance. However, these models heavily relied on a large number of drug chemical structural fingerprints as their main features, which made model interpretation a challenge. RESULTS This study developed a deep neural network model that predicts synergy between small-molecule pairs based on their inhibitory activities against 13 selected key proteins. The synergy prediction model achieved a Pearson correlation coefficient between model predictions and experimental data of 0.63 across five breast cancer cell lines. BT-549 and MCF-7 achieved the highest correlation of 0.67 when considering individual cell lines. Despite achieving a moderate correlation compared to previous deep learning models, our model offers a distinctive advantage in terms of interpretability. Using the inhibitory activities against key protein targets as the main features allowed a straightforward interpretation of the model since the individual features had direct biological meaning. By tracing the synergistic interactions of compounds through their target proteins, we gained insights into the patterns our model recognized as indicative of synergistic effects. CONCLUSIONS The framework employed in the present study lays the groundwork for future advancements, especially in model interpretation. By combining deep learning techniques and target-specific models, this study shed light on potential patterns of target-protein inhibition profiles that could be exploited in breast cancer treatment.
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Affiliation(s)
- Thanyawee Srithanyarat
- Bioinformatics and Systems Biology Program, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand
- School of Information Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand
| | - Kittisak Taoma
- Bioinformatics and Systems Biology Program, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand
- School of Information Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand
| | - Thana Sutthibutpong
- Department of Physics, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand
- Theoretical and Computational Physics Group, Center of Excellence in Theoretical and Computational Science, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand
| | - Marasri Ruengjitchatchawalya
- Bioinformatics and Systems Biology Program, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand
- Biotechnology Program, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand
| | - Monrudee Liangruksa
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, 12120, Thailand.
| | - Teeraphan Laomettachit
- Bioinformatics and Systems Biology Program, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand.
- Theoretical and Computational Physics Group, Center of Excellence in Theoretical and Computational Science, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand.
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Wang J, Liu H, Yang Y, Tan Y, Sun L, Guo Z, Zeng X, Wang Z, Li S, Yin L, Yin D, Shen X, Dai Y, Liu X, Ruan J, Li X, Zhao S, Peng G, Pan X, Wang C, Xie S. Genome-scale CRISPR screen identifies TRIM2 and SLC35A1 associated with porcine epidemic diarrhoea virus infection. Int J Biol Macromol 2023; 250:125962. [PMID: 37499712 DOI: 10.1016/j.ijbiomac.2023.125962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 07/29/2023]
Abstract
Porcine epidemic diarrhoea (PED) caused by the porcine epidemic diarrhoea virus (PEDV) is the most devastating disease in the global pig industry due to its high mortality rate in piglets. The host factors critical for PEDV replication are poorly understood. Here, we designed a pooled African green monkey genome-scale CRISPR/Cas9 knockout (VeroCKO) library containing 75,608 single guide RNAs targeting 18,993 protein-coding genes. Subsequently, we use the VeroCKO library to identify key host factors facilitating PEDV infection in Vero E6 cells. Several previously unreported genes associated with PEDV infection are highly enriched post-PEDV selection. We discovered that knocking out the tripartite motif 2 (TRIM2) and the solute carrier family 35 member A1 (SLC35A1) inhibited PEDV replication. Virtual screening and molecular docking approaches showed that chem-80,048,685 (M2) s ignificantly inhibited PEDV attachment and late replication by impeding SLC35A1. Furthermore, we found that knocking out SLC35A1 in Vero E6 cells upregulated a disintegrin and metalloprotease protein-17 (ADAM17) by splicing porcine aminopeptidase N (pAPN) and angiotensin-converting enzyme 2 (ACE2) ectodomains to reduce PEDV-infection in a CMP-Sialic Acid (CMP-SA) cell entry-independent manner. These findings provide a new perspective for a better understanding of host-pathogen interactions and new therapeutic targets for PEDV infection.
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Affiliation(s)
- Jieru Wang
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Hailong Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Yuqing Yang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Yubei Tan
- Key Laboratory of Prevention & Control for African Swine Fever and Other Major Pig Diseases, Ministry of Agriculture and Rural Affairs, Wuhan 430070, China
| | - Limeng Sun
- Key Laboratory of Prevention & Control for African Swine Fever and Other Major Pig Diseases, Ministry of Agriculture and Rural Affairs, Wuhan 430070, China
| | - Zishi Guo
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiaoyu Zeng
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Zichang Wang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Sheng Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Lei Yin
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Dongdong Yin
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Xuehuai Shen
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Yin Dai
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Xiangdong Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Jinxue Ruan
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Xinyun Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China
| | - Shuhong Zhao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China
| | - Guiqing Peng
- Key Laboratory of Prevention & Control for African Swine Fever and Other Major Pig Diseases, Ministry of Agriculture and Rural Affairs, Wuhan 430070, China; Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China.
| | - Xiaocheng Pan
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - Chonglong Wang
- Key Laboratory of Pig Molecular Quantitative Genetics of Anhui Academy of Agricultural Sciences, Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Anhui Provincial Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - Shengsong Xie
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education & Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Prevention & Control for African Swine Fever and Other Major Pig Diseases, Ministry of Agriculture and Rural Affairs, Wuhan 430070, China; Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China.
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Karthika CL, Venugopal V, Sreelakshmi BJ, Krithika S, Thomas JM, Abraham M, Kartha CC, Rajavelu A, Sumi S. Oscillatory shear stress modulates Notch-mediated endothelial mesenchymal plasticity in cerebral arteriovenous malformations. Cell Mol Biol Lett 2023; 28:22. [PMID: 36934253 PMCID: PMC10024393 DOI: 10.1186/s11658-023-00436-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 03/06/2023] [Indexed: 03/20/2023] Open
Abstract
BACKGROUND Cerebral arteriovenous malformations (cAVM) are a significant cause of intracranial hemorrhagic stroke and brain damage. The arteriovenous junctions in AVM nidus are known to have hemodynamic disturbances such as altered shear stress, which could lead to endothelial dysfunction. The molecular mechanisms coupling shear stress and endothelial dysfunction in cAVMs are poorly understood. We speculated that disturbed blood flow in artery-vein junctions activates Notch receptors and promotes endothelial mesenchymal plasticity during cAVM formation. METHODS We investigated the expression profile of endothelial mesenchymal transition (EndMT) and cell adhesion markers, as well as activated Notch receptors, in 18 human cAVM samples and 15 control brain tissues, by quantitative real-time PCR (qRT-PCR) and immunohistochemical evaluation. Employing a combination of a microfluidic system, qRT-PCR, immunofluorescence, as well as invasion and inhibitor assays, the effects of various shear stress conditions on Notch-induced EndMT and invasive potential of human cerebral microvascular endothelial cells (hCMEC/d3) were analyzed. RESULTS We found evidence for EndMT and enhanced expression of activated Notch intracellular domain (NICD3 and NICD4) in human AVM nidus samples. The expression of transmembrane adhesion receptor integrin α9/β1 is significantly reduced in cAVM nidal vessels. Cell-cell adhesion proteins such as VE-cadherin and N-cadherin were differentially expressed in AVM nidus compared with control brain tissues. Using well-characterized hCMECs, we show that altered fluid shear stress steers Notch3 nuclear translocation and promotes SNAI1/2 expression and nuclear localization. Oscillatory flow downregulates integrin α9/β1 and VE-cadherin expression, while N-cadherin expression and endothelial cell invasiveness are augmented. Gamma-secretase inhibitor RO4929097, and to a lesser level DAPT, prevent the mesenchymal transition and invasiveness of cerebral microvascular endothelial cells exposed to oscillatory fluid flow. CONCLUSIONS Our study provides, for the first time, evidence for the role of oscillatory shear stress in mediating the EndMT process and dysregulated expression of cell adhesion molecules, especially multifunctional integrin α9/β1 in human cAVM nidus. Concomitantly, our findings indicate the potential use of small-molecular inhibitors such as RO4929097 in the less-invasive therapeutic management of cAVMs.
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Affiliation(s)
- C L Karthika
- Cardiovascular Diseases and Diabetes Biology, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala, 695014, India
| | - Vani Venugopal
- Cardiovascular Diseases and Diabetes Biology, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala, 695014, India
| | - B J Sreelakshmi
- Cardiovascular Diseases and Diabetes Biology, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala, 695014, India
| | - S Krithika
- Cardiovascular Diseases and Diabetes Biology, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala, 695014, India
| | - Jaya Mary Thomas
- Cardiovascular Diseases and Diabetes Biology, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala, 695014, India
| | - Mathew Abraham
- Department of Neurosurgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, 695011, India
| | - C C Kartha
- Department of Neurology, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, 682041, India
| | - Arumugam Rajavelu
- Department of Biotechnology, Bhupat & Jyoti Mehta School of Biosciences, Indian Institute of Technology, Madras, Chennai, Tamil Nadu, 600036, India
| | - S Sumi
- Cardiovascular Diseases and Diabetes Biology, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala, 695014, India.
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Guo C, Wu L, Zheng X, Zhao L, Hou X, Wang Z, Han C. Research Progress on Small-molecule Inhibitors of Protein Arginine Methyltransferase 5 (PRMT5) for Treating Cancer. Curr Top Med Chem 2023; 23:2048-2074. [PMID: 37438905 DOI: 10.2174/1568026623666230712120527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/22/2023] [Accepted: 05/30/2023] [Indexed: 07/14/2023]
Abstract
BACKGROUND The protein arginine methyltransferase family includes nine members, with PRMT5 being the major type II arginine methyltransferase. PRMT5 is upregulated in a variety of tumors and promotes tumorigenesis and tumor cell proliferation and metastasis, making it a potential tumor therapy target. Recently, PRMT5 inhibitor research and development have become hotspots in the tumor therapy field. METHODS We classified and summarized PRMT5 inhibitors according to different binding mechanisms. We mainly analyzed the structure, biological activity, and binding interactions of PRMT5 inhibitors with the PRMT5 enzyme. RESULTS At present, many PRMT5 inhibitors with various mechanisms of action have been reported, including substrate-competitive inhibitors, SAM-competitive inhibitors, dual substrate-/SAMcompetitive inhibitors, allosteric inhibitors, PRMT5 degraders, MTA-cooperative PRMT5 inhibitors and PPI inhibitors. CONCLUSION These inhibitors are beneficial to the treatment of tumors. Some drugs are being used in clinical trials. PRMT5 inhibitors have broad application prospects in tumor therapy.
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Affiliation(s)
- Chaohua Guo
- Department of Chemistry, Key Laboratory of Antitumor Drugs and Companion Diagnostic Reagents, Changzhi University, Changzhi, 046011, Shanxi, China
- School of Chemistry & Material Science, Shanxi Normal University, Taiyuan, 030006, Shanxi, China
| | - Lintao Wu
- Department of Chemistry, Key Laboratory of Antitumor Drugs and Companion Diagnostic Reagents, Changzhi University, Changzhi, 046011, Shanxi, China
| | - Xumei Zheng
- Department of Chemistry, Key Laboratory of Antitumor Drugs and Companion Diagnostic Reagents, Changzhi University, Changzhi, 046011, Shanxi, China
- School of Chemistry & Material Science, Shanxi Normal University, Taiyuan, 030006, Shanxi, China
| | - Lin Zhao
- Department of Chemistry, Key Laboratory of Antitumor Drugs and Companion Diagnostic Reagents, Changzhi University, Changzhi, 046011, Shanxi, China
- School of Chemistry & Material Science, Shanxi Normal University, Taiyuan, 030006, Shanxi, China
| | - Xiaojia Hou
- Department of Chemistry, Key Laboratory of Antitumor Drugs and Companion Diagnostic Reagents, Changzhi University, Changzhi, 046011, Shanxi, China
- School of Chemistry & Material Science, Shanxi Normal University, Taiyuan, 030006, Shanxi, China
| | - Zhijun Wang
- Department of Chemistry, Key Laboratory of Antitumor Drugs and Companion Diagnostic Reagents, Changzhi University, Changzhi, 046011, Shanxi, China
| | - Chun Han
- Department of Chemistry, Key Laboratory of Antitumor Drugs and Companion Diagnostic Reagents, Changzhi University, Changzhi, 046011, Shanxi, China
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8
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Preti B, Rougier JS, Papapostolou I, Bochen F, Gerber CE, Abriel H, Lochner M, Peinelt C. Targeting Ion Channel TRPM4. Chimia (Aarau) 2022; 76:1039-1044. [PMID: 38069800 DOI: 10.2533/chimia.2022.1039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 10/23/2022] [Indexed: 12/18/2023] Open
Abstract
The transient receptor potential melastatin 4 (TRPM4) ion channel is ubiquitously expressed. Dysregulation and/or functional mutations of TRPM4 lead to several diseases. Within our studies, we screened for TRPM4 inhibitors and identified small molecules that block TRPM4 in the low µM range. Furthermore, we investigated the pathophysiology of TRPM4 in cardiac conditions, immune diseases and cancer using these novel inhibitors, molecular biology techniques and functional assays.
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Affiliation(s)
- Barbara Preti
- Institute if Biochemistry and Molecular Medicine, University of Bern
| | | | | | - Florian Bochen
- Institute of Biochemistry and Molecular Medicine, University of Bern
| | | | - Hugues Abriel
- Institute of Biochemistry and Molecular Medicine, University of Bern.
| | - Martin Lochner
- Institute of Biochemistry and Molecular Medicine, University of Bern.
| | - Christine Peinelt
- Institute of Biochemistry and Molecular Medicine, University of Bern.
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9
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Li Z, Xing X, Gomez-Salazar MA, Xu M, Negri S, Xu J, James AW. Pharmacological inhibition of DKK1 promotes spine fusion in an ovariectomized rat model. Bone 2022; 162:116456. [PMID: 35688363 DOI: 10.1016/j.bone.2022.116456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 11/02/2022]
Abstract
Osteoporosis is common in patients undergoing spine surgery, and carries a considerable risk of adverse outcomes. New methods to positively influence bone regeneration and spine fusion under osteoporotic conditions would be impactful. Neutralizing anti-Dickkopf-1 (DKK1) antibodies has been used as a bone anabolic agent, and recently reported by our group to aid in stem cell-mediated appendicular bone regeneration. Here, a small molecule designed as a DKK1 inhibitor, WAY-262611, was used to induce posterolateral spine fusion in an ovariectomized rat model. In vitro, pharmacological inhibition of DKK1 enhanced osteogenesis and Wnt signaling activity among rat bone marrow-derived stem/stromal cells (BMSCs). In vivo, systemic treatment with WAY-262611 promoted both chondrogenesis and osteogenesis within the spinal fusion site, and ultimately led to significant improvements in lumbar fusion as assessed by XR, μCT, histology and manual palpation assessments. No significant effect on osteoclast numbers or fusion site angiogenesis was detected, suggesting a primary direct effect on mesenchymal cells of the implantation site. Finally, evidence from human stem/stromal cells further demonstrated that pharmacologic inhibition of DKK1 promoted osteogenic differentiation in vitro. Taken together, our results suggest that targeting DKK1 promotes local bone formation and suggests potential clinical value for osteoporotic bone repair.
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Affiliation(s)
- Zhao Li
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205,USA
| | - Xin Xing
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205,USA
| | | | - Mingxin Xu
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205,USA
| | - Stefano Negri
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205,USA; Department of Orthopaedics and Traumatology, University of Verona, Verona 37129, Italy
| | - Jiajia Xu
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205,USA
| | - Aaron W James
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21205,USA.
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10
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Kell SR, Wang Z, Ji H. Fragment hopping protocol for the design of small-molecule protein-protein interaction inhibitors. Bioorg Med Chem 2022; 69:116879. [PMID: 35749838 DOI: 10.1016/j.bmc.2022.116879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/29/2022] [Accepted: 06/08/2022] [Indexed: 11/02/2022]
Abstract
Fragment-based ligand discovery (FBLD) is one of the most successful approaches to designing small-molecule protein-protein interaction (PPI) inhibitors. The incorporation of computational tools to FBLD allows the exploration of chemical space in a time- and cost-efficient manner. Herein, a computational protocol for the development of small-molecule PPI inhibitors using fragment hopping, a fragment-based de novo design approach, is described and a case study is presented to illustrate the efficiency of this protocol. Fragment hopping facilitates the design of PPI inhibitors from scratch solely based on key binding features in the PPI complex structure. This approach is an open system that enables the inclusion of different state-of-the-art programs and softwares to improve its performances.
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Affiliation(s)
- Shelby R Kell
- Drug Discovery Department, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, United States; Department of Chemistry, University of South Florida, Tampa, FL 33620, United States
| | - Zhen Wang
- Drug Discovery Department, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, United States; Department of Chemistry, University of South Florida, Tampa, FL 33620, United States
| | - Haitao Ji
- Drug Discovery Department, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, United States; Department of Chemistry, University of South Florida, Tampa, FL 33620, United States.
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11
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Zhang Q, Zhang L, Jin J, Fan Y, Wang X, Hu H, Ye X, Wang L, Cao C, Ye F. Identification of PRMT5 inhibitors with novel scaffold structures through virtual screening and biological evaluations. J Mol Model 2022; 28:184. [PMID: 35680707 DOI: 10.1007/s00894-022-05125-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 04/27/2022] [Indexed: 11/30/2022]
Abstract
Protein arginine methyltransferase 5 (PRMT5), an important member in PRMT family, has been validated as a promising anticancer target. In this study, through the combination of virtual screening and biological experiments, we have identified two PRMT5 inhibitors with novel scaffold structures. Among them, compound Y2431 showed moderate activity with IC50 value of 10.09 μM and displayed good selectivity against other methyltransferases. The molecular docking analysis and molecular dynamics (MD) simulations suggested that the compound occupied the substrate-arginine binding site. Furthermore, Y2431 exhibited anti-proliferative activity to leukemia cells by inducing cell cycle arrest. Overall, the hit compound could provide a novel scaffold for further optimization of small-molecule PRMT5 inhibitors.
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Affiliation(s)
- Qian Zhang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Lun Zhang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Jia Jin
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Yaohua Fan
- Department of Surgery, The Second Affiliated Hospital of Jia Xing University, Jiaxing, China
| | - Xiaoguang Wang
- Department of Surgery, The Second Affiliated Hospital of Jia Xing University, Jiaxing, China
| | - Haofeng Hu
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Xiaoqing Ye
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materta Medica, Chinese Academy of Sciences, Shanghai, China
| | - Lei Wang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Chenxi Cao
- Department of Surgery, The Second Affiliated Hospital of Jia Xing University, Jiaxing, China.
| | - Fei Ye
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.
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12
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Yue P, Zhu Y, Brotherton-Pleiss C, Fu W, Verma N, Chen J, Nakamura K, Chen W, Chen Y, Alonso-Valenteen F, Mikhael S, Medina-Kauwe L, Kershaw KM, Celeridad M, Pan S, Limpert AS, Sheffler DJ, Cosford NDP, Shiao SL, Tius MA, Lopez-Tapia F, Turkson J. Novel potent azetidine-based compounds irreversibly inhibit Stat3 activation and induce antitumor response against human breast tumor growth in vivo. Cancer Lett 2022; 534:215613. [PMID: 35276290 PMCID: PMC9867837 DOI: 10.1016/j.canlet.2022.215613] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/09/2022] [Accepted: 02/27/2022] [Indexed: 01/26/2023]
Abstract
Signal transducer and activator of transcription (Stat)3 is a valid anticancer therapeutic target. We have discovered a highly potent chemotype that amplifies the Stat3-inhibitory activity of lead compounds to levels previously unseen. The azetidine-based compounds, including H172 (9f) and H182, irreversibly bind to Stat3 and selectively inhibit Stat3 activity (IC50 0.38-0.98 μM) over Stat1 or Stat5 (IC50 > 15.8 μM) in vitro. Mass spectrometry detected the Stat3 cysteine peptides covalently bound to the azetidine compounds, and the key residues, Cys426 and Cys468, essential for the high potency inhibition, were confirmed by site-directed mutagenesis. In triple-negative breast cancer (TNBC) models, treatment with the azetidine compounds inhibited constitutive and ligand-induced Stat3 signaling, and induced loss of viable cells and tumor cell death, compared to no effect on the induction of Janus kinase (JAK)2, Src, epidermal growth factor receptor (EGFR), and other proteins, or weak effects on cells that do not harbor aberrantly-active Stat3. H120 (8e) and H182 as a single agent inhibited growth of TNBC xenografts, and H278 (hydrochloric acid salt of H182) in combination with radiation completely blocked mouse TNBC growth and improved survival in syngeneic models. We identify potent azetidine-based, selective, irreversible Stat3 inhibitors that inhibit TNBC growth in vivo.
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Affiliation(s)
- Peibin Yue
- Department of Medicine, Division of Medical Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angenes, CA, 90048, USA,Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Yinsong Zhu
- Department of Medicine, Division of Medical Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angenes, CA, 90048, USA,Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Christine Brotherton-Pleiss
- Cancer Biology Program, University of Hawaii Cancer Center, 701 Ilalo St, Honolulu, HI, 96813, USA,Department of Chemistry, University of Hawaii, Manoa, 2545 McCarthy Mall, Honolulu, HI, 96825, USA
| | - Wenzhen Fu
- Cancer Biology Program, University of Hawaii Cancer Center, 701 Ilalo St, Honolulu, HI, 96813, USA,Department of Chemistry, University of Hawaii, Manoa, 2545 McCarthy Mall, Honolulu, HI, 96825, USA
| | - Nagendra Verma
- Department of Medicine, Division of Medical Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angenes, CA, 90048, USA,Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Jasmine Chen
- Cancer Biology Program, University of Hawaii Cancer Center, 701 Ilalo St, Honolulu, HI, 96813, USA
| | - Kayo Nakamura
- Department of Chemistry, University of Hawaii, Manoa, 2545 McCarthy Mall, Honolulu, HI, 96825, USA
| | - Weiliang Chen
- Department of Chemistry, University of Hawaii, Manoa, 2545 McCarthy Mall, Honolulu, HI, 96825, USA
| | - Yue Chen
- Department of Medicine, Division of Medical Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angenes, CA, 90048, USA,Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Felix Alonso-Valenteen
- Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA,Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Simoun Mikhael
- Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA,Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Lali Medina-Kauwe
- Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA,Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Kathleen M. Kershaw
- Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA,Department of Radiation Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Maria Celeridad
- Cell and Molecular Biology of Cancer Program, Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Rd, La Jolla, CA, 92037, USA
| | - Songqin Pan
- W. M. Keck Proteomics Laboratory, University of California, Riverside, CA, 92521, USA
| | - Allison S. Limpert
- Cell and Molecular Biology of Cancer Program, Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Rd, La Jolla, CA, 92037, USA
| | - Douglas J. Sheffler
- Cell and Molecular Biology of Cancer Program, Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Rd, La Jolla, CA, 92037, USA
| | - Nicholas D. P. Cosford
- Cell and Molecular Biology of Cancer Program, Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Rd, La Jolla, CA, 92037, USA
| | - Stephen L. Shiao
- Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA,Department of Radiation Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA
| | - Marcus A. Tius
- Cancer Biology Program, University of Hawaii Cancer Center, 701 Ilalo St, Honolulu, HI, 96813, USA,Department of Chemistry, University of Hawaii, Manoa, 2545 McCarthy Mall, Honolulu, HI, 96825, USA
| | - Francisco Lopez-Tapia
- Department of Medicine, Division of Medical Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angenes, CA, 90048, USA,Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA,Corresponding author. Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA. (J. Turkson)
| | - James Turkson
- Department of Medicine, Division of Medical Oncology, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angenes, CA, 90048, USA; Cancer Biology Program, Cedars-Sinai Cancer, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA, 90048, USA.
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13
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Xiang R, Yu Z, Wang Y, Wang L, Huo S, Li Y, Liang R, Hao Q, Ying T, Gao Y, Yu F, Jiang S. Recent advances in developing small-molecule inhibitors against SARS-CoV-2. Acta Pharm Sin B 2022; 12:1591-1623. [PMID: 34249607 PMCID: PMC8260826 DOI: 10.1016/j.apsb.2021.06.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 06/13/2021] [Accepted: 06/23/2021] [Indexed: 02/07/2023] Open
Abstract
The COVID-19 pandemic caused by the novel SARS-CoV-2 virus has caused havoc across the entire world. Even though several COVID-19 vaccines are currently in distribution worldwide, with others in the pipeline, treatment modalities lag behind. Accordingly, researchers have been working hard to understand the nature of the virus, its mutant strains, and the pathogenesis of the disease in order to uncover possible drug targets and effective therapeutic agents. As the research continues, we now know the genome structure, epidemiological and clinical features, and pathogenic mechanism of SARS-CoV-2. Here, we summarized the potential therapeutic targets involved in the life cycle of the virus. On the basis of these targets, small-molecule prophylactic and therapeutic agents have been or are being developed for prevention and treatment of SARS-CoV-2 infection.
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Affiliation(s)
- Rong Xiang
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
| | - Zhengsen Yu
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
| | - Yang Wang
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
| | - Lili Wang
- Research Center of Chinese Jujube, Hebei Agricultural University, Baoding 071001, China
| | - Shanshan Huo
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
| | - Yanbai Li
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
| | - Ruiying Liang
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
| | - Qinghong Hao
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
| | - Tianlei Ying
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Institute of Infectious Diseases and Biosecurity, Fudan University, Shanghai 200032, China
| | - Yaning Gao
- Beijing Pharma and Biotech Center, Beijing 100176, China,Corresponding authors. Tel.: +86 21 54237673, fax: +86 21 54237465 (Shibo Jiang); Tel.: +86 312 7528935, fax: +86 312 7521283 (Fei Yu); Tel.: +86 10 62896868; fax: +86 10 62899978, (Yanning Gao).
| | - Fei Yu
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China,Corresponding authors. Tel.: +86 21 54237673, fax: +86 21 54237465 (Shibo Jiang); Tel.: +86 312 7528935, fax: +86 312 7521283 (Fei Yu); Tel.: +86 10 62896868; fax: +86 10 62899978, (Yanning Gao).
| | - Shibo Jiang
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Institute of Infectious Diseases and Biosecurity, Fudan University, Shanghai 200032, China,Corresponding authors. Tel.: +86 21 54237673, fax: +86 21 54237465 (Shibo Jiang); Tel.: +86 312 7528935, fax: +86 312 7521283 (Fei Yu); Tel.: +86 10 62896868; fax: +86 10 62899978, (Yanning Gao).
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14
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Grimberg H, Tiwari VS, Tam B, Gur-Arie L, Gingold D, Polachek L, Akabayov B. Machine learning approaches to optimize small-molecule inhibitors for RNA targeting. J Cheminform 2022; 14:4. [PMID: 35109921 PMCID: PMC8811966 DOI: 10.1186/s13321-022-00583-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 01/17/2022] [Indexed: 01/22/2023] Open
Abstract
In the era of data science, data-driven algorithms have emerged as powerful platforms that can consolidate bioisosteric rules for preferential modifications on small molecules with a common molecular scaffold. Here we present complementary data-driven algorithms to minimize the search in chemical space for phenylthiazole-containing molecules that bind the RNA hairpin within the ribosomal peptidyl transferase center (PTC) of Mycobacterium tuberculosis. Our results indicate visual, geometrical, and chemical features that enhance the binding to the targeted RNA. Functional validation was conducted after synthesizing 10 small molecules pinpointed computationally. Four of the 10 were found to be potent inhibitors that target hairpin 91 in the ribosomal PTC of M. tuberculosis and, as a result, stop translation.
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Affiliation(s)
- Hadar Grimberg
- Department of Chemistry and Data Science Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Vinay S Tiwari
- Department of Chemistry and Data Science Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Benjamin Tam
- Department of Chemistry and Data Science Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Lihi Gur-Arie
- Department of Chemistry and Data Science Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Daniela Gingold
- Department of Chemistry and Data Science Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Lea Polachek
- Department of Chemistry and Data Science Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Barak Akabayov
- Department of Chemistry and Data Science Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel.
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15
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Abstract
c-MYC controls global gene expression and regulates cell proliferation, cell differentiation, cell cycle, metabolism and apoptosis. According to some estimates, MYC is dysregulated in ≈70% of human cancers and strong evidence implicates aberrantly expressed MYC in both tumor initiation and maintenance. In vivo studies show that MYC inhibition elicits a prominent anti-proliferative effect and sustained tumor regression while any alteration on healthy tissue remains reversible. This opens an exploitable window for treatment that makes MYC one of the most appealing therapeutic targets for cancer drug development. This review describes the main functional and structural features of the protein structure of MYC and provides a general overview of the most relevant or recently identified interactors that modulate MYC oncogenic activity. This review also summarizes the different approaches aiming to abrogate MYC oncogenic function, with a particular focus on the prototype inhibitors designed for the direct and indirect targeting of MYC.
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Affiliation(s)
- Victor Llombart
- UCL Cancer Institute, University College London, Department of Haematology, London WC1E 6DD, UK
| | - Marc R Mansour
- UCL Cancer Institute, University College London, Department of Haematology, London WC1E 6DD, UK; UCL Great Ormond Street Institute of Child Health, Developmental Biology and Cancer, London, UK.
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16
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Baugh SDP, Jackson MR, Rashad AA, Reitz AB, Lam PYS, Jorns MS. Synthesis and evaluation of potent novel inhibitors of human sulfide:quinone oxidoreductase. Bioorg Med Chem Lett 2021; 54:128443. [PMID: 34763081 DOI: 10.1016/j.bmcl.2021.128443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/20/2021] [Accepted: 11/02/2021] [Indexed: 10/19/2022]
Abstract
Here we report the first small-molecule inhibitors of human sulfide:quinone oxidoreductase (SQOR) that decrease the rate of breakdown of hydrogen sulfide (H2S), a potent cardioprotective signaling molecule. SQOR is a mitochondrial membrane-bound protein that catalyzes a two-electron oxidation of H2S to sulfane sulfur (S0), using glutathione (or sulfite) and coenzyme Q (CoQ) as S0 and electron acceptor, respectively. Inhibition of SQOR may constitute a new approach for the treatment of heart failure with reduced ejection fraction. Starting from top hits identified in a high-throughput screen, we conducted SAR development guided by docking of lead candidates into our crystal structure of SQOR. We identified potent SQOR inhibitors such as 19 which has an IC50 of 29 nM for SQOR inhibition and favorable pharmacokinetic and ADME properties required for in vivo efficacy testing.
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Affiliation(s)
- Simon D P Baugh
- Fox Chase Chemical Diversity Center, Inc., Doylestown, PA 18902, USA
| | - Michael R Jackson
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
| | - Adel Ahmed Rashad
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
| | - Allen B Reitz
- Fox Chase Chemical Diversity Center, Inc., Doylestown, PA 18902, USA
| | - Patrick Y S Lam
- Fox Chase Chemical Diversity Center, Inc., Doylestown, PA 18902, USA
| | - Marilyn Schuman Jorns
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA 19102, USA.
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17
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Morris A, Pagare PP, Li J, Zhang Y. Drug discovery efforts toward inhibitors of canonical Wnt/β-catenin signaling pathway in the treatment of cancer: A composition-of-matter review (2010-2020). Drug Discov Today 2021; 27:1115-1127. [PMID: 34800684 DOI: 10.1016/j.drudis.2021.11.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 10/18/2021] [Accepted: 11/12/2021] [Indexed: 12/20/2022]
Abstract
The Wnt/β-catenin pathway has a crucial role in the proliferation and differentiation of normal cells as well as the self-renewal and pluripotency of stem cells, including cancer stem cells (CSCs). Targeting this pathway with small-molecule chemotherapeutics, discovered via conventional efforts, has proved difficult. Recently, computer-aided drug discovery efforts have produced promising chemotherapeutics. A concerted effort to develop inhibitors of this pathway through more efficient and cost-effective drug discovery methods could lead to a significant increase in clinically relevant therapeutics. Herein, patents from 2010 to 2020 are reviewed to identify those that have disclosed composition of matter for small-molecule inhibitors of the Wnt/ β-catenin pathway for cancer. We believe that such efforts will provide insights for future therapeutic candidate discovery and development in this field.
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Affiliation(s)
- Andrew Morris
- Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Piyusha P Pagare
- Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Jiong Li
- Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA; The Institute for Structural Biology, Drug Discovery, and Development, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Yan Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA; The Institute for Structural Biology, Drug Discovery, and Development, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA.
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18
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Awadasseid A, Wu Y, Zhang W. Advance investigation on synthetic small-molecule inhibitors targeting PD-1/PD-L1 signaling pathway. Life Sci 2021; 282:119813. [PMID: 34256042 DOI: 10.1016/j.lfs.2021.119813] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 06/27/2021] [Accepted: 07/06/2021] [Indexed: 01/01/2023]
Abstract
Immune checkpoint blockade has displayed substantial anti-tumor resistance in a variety of forms of cancer, but the fundamental regulation role remains unclear, and several questions continue to be addressed. PD-1/PD-L1 has been recognized as an anti-cancer drug target for several years, and through targeting the PD-1/PD-L1 signaling pathway, many monoclonal antibodies have thus far produced promising results in cancer therapy. The discovery of small-molecule inhibitors focused on the PD-1/PD-L1 signaling pathway is steadily reviving over decades, owing to the intrinsic shortcomings of the antibodies. PD-1 function and its PD-L1 or PD-L2 ligands are essential for the activation, proliferation, and cytotoxic secretion of T-cells in cancer to degenerate anti-tumor immune response. The axis PD-1/PD-L1 is important for the immune escape of cancer which has an immense impact on cancer treatment. In this review, we summarize the function of PD-1 and PD-L1 in cancer and aiming to enhance cancer therapy.
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Affiliation(s)
- Annoor Awadasseid
- Lab of Chemical Biology and Molecular Drug Design, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Drug Development & Chemical Biology, Zhejiang University of Technology, Hangzhou 310014, China; Department of Biochemistry & Food Sciences, University of Kordofan, El-Obeid 51111, Sudan
| | - Yanling Wu
- Lab of Molecular Immunology, Virus Inspection Department, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China.
| | - Wen Zhang
- Lab of Chemical Biology and Molecular Drug Design, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Drug Development & Chemical Biology, Zhejiang University of Technology, Hangzhou 310014, China.
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19
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Zou XZ, Zhou XH, Feng YQ, Hao JF, Liang B, Jia MW. Novel inhibitor of OCT1 enhances the sensitivity of human esophageal squamous cell carcinoma cells to antitumor agents. Eur J Pharmacol 2021; 907:174222. [PMID: 34087221 DOI: 10.1016/j.ejphar.2021.174222] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/27/2021] [Accepted: 05/28/2021] [Indexed: 12/22/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most fatal malignancies of the digestive system, and shows an especially high incidence in some regions of China. Octamer transcription factors are a family of transcription factors whose DNA-binding domain is a POU domain. OCT transcription factors (OCT-TFs) mediate maintenance of the pluripotency of embryonic stem cells. We measured expression of OCT-TFs in ESCC clinical specimens. Among the OCTs tested, OCT1 showed the highest expression in ESCC tissues. Using molecular docking, we discovered a small-molecule inhibitor, which we named "novel inhibitor of OCT1" (NIO-1), for OCT1. Treatment with NIO-1 inhibited recruitment of OCT1 to the promoter region of its downstream genes and, consequently, repressed OCT1 activation. Treatment with NIO-1 enhanced the susceptibility of ESCC cells to chemotherapeutic agents. Therefore, OCT1 may be a valuable target for ESCC treatment, and NIO-1 could be a promising therapeutic agent.
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Affiliation(s)
- Xiao-Zheng Zou
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, Liaoning Province, PR China.
| | - Xiu-Hua Zhou
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, Liaoning Province, PR China.
| | - Ying-Qi Feng
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, Liaoning Province, PR China.
| | - Jun-Feng Hao
- Department of Nephrology, Jin Qiu Hospital of Liaoning Province / Geriatric Hospital of Liaoning Province, Shenyang, 110016, Liaoning Province, PR China.
| | - Bing Liang
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, Liaoning Province, PR China.
| | - Meng-Wei Jia
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, Liaoning Province, PR China.
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20
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Huang Q, Zhong Y, Li B, Ouyang S, Deng L, Mo J, Shi S, Lv N, Wu R, Liu P, Hu W, Zhang X, Wang Y. Structure-based discovery of potent and selective small-molecule inhibitors targeting signal transducer and activator of transcription 3 (STAT3). Eur J Med Chem 2021; 221:113525. [PMID: 34000483 DOI: 10.1016/j.ejmech.2021.113525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/11/2021] [Accepted: 04/23/2021] [Indexed: 10/21/2022]
Abstract
STAT3 has been validated as an attractive anticancer target due to its important roles in cancer initiation and progression. However, discovery of potent and selective STAT3 small-molecule inhibitors with druglike properties is still challenging. In this study, two series of substituted 2-phenylquinolines and 2-arylimidazo[1,2-a]pyridines were designed through structure-based drug discovery approach by condensing the privileged structures of STX-119 and SH4-54. Our study has resulted in the discovery of a number of highly potent and selective STAT3 inhibitors, exemplified by compound 39 with the privileged structure of 2-phenylimidazo[1,2-a]pyridine, which selectively inhibits phosphorylation of STAT3 and suppresses subsequent signaling pathway. Moreover, 39 inhibits cell growth, migration and invasion of human triple negative breast cancer (TNBC) cells lines. Consistently, it achieves significant and dose-dependent tumor growth inhibition in both cell line-derived and patient-derived xenograft tumor models in mice. These results clearly indicate that 39 is a highly potent and selective STAT3 inhibitor.
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Affiliation(s)
- Qiuyao Huang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Yan Zhong
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Bingbing Li
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Shumin Ouyang
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Lin Deng
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Jianshan Mo
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Shuo Shi
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Nan Lv
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Ruibo Wu
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Peiqing Liu
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Wenhao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Xiaolei Zhang
- Guangdong Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China.
| | - Yuanxiang Wang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China.
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21
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Yang J, König A, Park S, Jo E, Sung PS, Yoon SK, Zusinaite E, Kainov D, Shum D, Windisch MP. A new high-content screening assay of the entire hepatitis B virus life cycle identifies novel antivirals. JHEP Rep 2021; 3:100296. [PMID: 34222850 PMCID: PMC8243515 DOI: 10.1016/j.jhepr.2021.100296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 03/11/2021] [Accepted: 04/07/2021] [Indexed: 12/12/2022] Open
Abstract
Background & Aims Chronic hepatitis B is an incurable disease. Addressing the unmet medical need for therapies has been hampered by a lack of suitable cell culture models to investigate the HBV life cycle in a single experimental setup. We sought to develop a platform suitable to investigate all aspects of the entire HBV life cycle. Methods HepG2-NTCPsec+ cells were inoculated with HBV. Supernatants of infected cells were transferred to naïve cells. Inhibition of infection was determined in primary and secondary infected cells by high-content imaging of viral and cellular factors. Novel antivirals were triaged in cells infected with cell culture- or patient-derived HBV and in stably virus replicating cells. HBV internalisation and target-based receptor binding assays were conducted. Results We developed an HBV platform, screened 2,102 drugs and bioactives, and identified 3 early and 38 late novel HBV life cycle inhibitors using infectious HBV genotype D. Two early inhibitors, pranlukast (EC50 4.3 μM; 50% cytotoxic concentration [CC50] >50 μM) and cytochalasin D (EC50 0.07 μM; CC50 >50 μM), and 2 late inhibitors, fludarabine (EC50 0.1 μM; CC50 13.4 μM) and dexmedetomidine (EC50 6.2 μM; CC50 >50 μM), were further investigated. Pranlukast inhibited HBV preS1 binding, whereas cytochalasin D prevented the internalisation of HBV. Fludarabine inhibited the secretion of HBV progeny DNA, whereas dexmedetomidine interfered with the infectivity of HBV progeny. Patient-derived HBV genotype C was efficiently inhibited by fludarabine (EC50 0.08 μM) and dexmedetomidine (EC50 8.7 μM). Conclusions The newly developed high-content assay is suitable to screen large-scale drug libraries, enables monitoring of the entire HBV life cycle, and discriminates between inhibition of early and late viral life cycle events. Lay summary HBV infection is an incurable, chronic disease with few available treatments. Addressing this unmet medical need has been hampered by a lack of suitable cell culture models to study the entire viral life cycle in a single experimental setup. We developed an image-based approach suitable to screen large numbers of drugs, using a cell line that can be infected by HBV and produces large amounts of virus particles. By transferring viral supernatants from these infected cells to uninfected target cells, we could monitor the entire viral life cycle. We used this system to screen drug libraries and identified novel anti-HBV inhibitors that potently inhibit HBV in various phases of its life cycle. This assay will be an important new tool to study the HBV life cycle and accelerate the development of novel therapeutic strategies. We developed a high-content screening assay suitable to monitor the entire HBV life cycle and eligible to discriminate between early and late viral life cycle inhibition. We screened FDA-approved drugs and bioactives. We confirmed antiviral activity in primary and secondary assays, using stably virus replicating cells and cell culture- and patient-derived HBV. Novel HBV inhibitors prevent receptor binding, virus internalisation, replication, or egress of viral progeny.
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Key Words
- %CV, percent coefficient of variation
- %Imax, percent maximum inhibition
- CC50, 50% cytotoxic concentration
- CHB, chronic hepatitis B
- CpAM, core protein allosteric modifiers
- DRC, dose–response curve
- Entry
- FDA, Food and Drug Administration
- FDA-approved drugs
- GEq, genome equivalents
- HBV
- HBVpt, patient-derived HBV
- HCC, hepatocellular carcinoma
- HCS, high content screening
- HID, N-hydroxyisoquinolinedione
- HLCs, hepatocyte-like cells
- HTS, high-throughput screening
- HepG2-NTCP
- High-throughput screening
- IFA, immunofluorescence analysis
- IFNα, interferon alpha
- IFNλ, interferon lambda
- LHB, HBV large surface protein
- LMV, lamivudine
- MoA, mechanism of action
- MyrB, myrcludex B
- NTCP, sodium taurocholate cotransporting polypeptide
- PEG, polyethylene glycol
- PF-rcDNA, protein-free relaxed circular DNA
- Patient-derived HBV
- Replication
- SARS-CoV-2, severe acute respiratory syndrome coronavirus 2
- SOP, standard operation procedure
- Small-molecule inhibitors
- Supernatant transfer
- TDF, tenofovir disoproxil fumarate
- TI, therapeutic index
- Virion secretion
- cccDNA, covalently closed circular DNA
- dpi, days post-infection
- iPSCs, induced pluripotent stem cells
- p1, passage 1
- p2, passage 2
- pgRNA, pregenomic RNA
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Affiliation(s)
- Jaewon Yang
- Applied Molecular Virology Laboratory, Institut Pasteur Korea, Seongnam-si, South Korea
| | - Alexander König
- Applied Molecular Virology Laboratory, Institut Pasteur Korea, Seongnam-si, South Korea
| | - Soonju Park
- Screening Discovery Platform, Institut Pasteur Korea, Seongnam-si, South Korea
| | - Eunji Jo
- Applied Molecular Virology Laboratory, Institut Pasteur Korea, Seongnam-si, South Korea
| | - Pil Soo Sung
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, South Korea.,Catholic University Liver Research Center, The Catholic University of Korea, Seoul, South Korea
| | - Seung Kew Yoon
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, South Korea.,Catholic University Liver Research Center, The Catholic University of Korea, Seoul, South Korea
| | - Eva Zusinaite
- Institute of Technology, University of Tartu, Tartu, Estonia
| | - Denis Kainov
- Institute of Technology, University of Tartu, Tartu, Estonia.,Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - David Shum
- Screening Discovery Platform, Institut Pasteur Korea, Seongnam-si, South Korea
| | - Marc Peter Windisch
- Applied Molecular Virology Laboratory, Institut Pasteur Korea, Seongnam-si, South Korea.,Division of Bio-Medical Science and Technology, University of Science and Technology, Daejeon, South Korea
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22
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Islam MK, Stanslas J. Peptide-based and small molecule PD-1 and PD-L1 pharmacological modulators in the treatment of cancer. Pharmacol Ther 2021; 227:107870. [PMID: 33895183 DOI: 10.1016/j.pharmthera.2021.107870] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 04/09/2021] [Accepted: 04/20/2021] [Indexed: 12/15/2022]
Abstract
Cancer immunotherapy is an option to enhance physiological defence mechanism to fight cancer, where natural substances (e.g., antigen/antibody) or small synthetic molecule can be utilized to improve and restore the immune system to stop or slacken the development of malignant cells, stop metastasis and/or help the immune response with synthetic monoclonal antibodies (mAbs) and tumour-agnostic therapy to eliminate cancer cells. Interaction between the programmed cell death ligand 1 (PD-L1) and its receptor (programmed cell death protein 1, PD-1), and cytotoxic T-lymphocyte-associated protein 4 (CTLA4) linked signalling pathways have been identified as perilous towards the body's immune mechanism in regulating the progression of cancer. It is known that certain cancers use these pathways to evade the body's defence mechanism. The immune system is capable of responding to cancer by stalling these trails with specific synthetic antibodies or immune checkpoint inhibitors, which can ultimately either stop or slow cancer cell development. Recent findings and data suggested that using such inhibitors invigorated a new approach to cancer treatment. These inhibitors usually activate the immune system to identify and eliminate cancer cells rather than attacking tumour cells directly. PD-1/PD-L1 inhibitors have already been substantiated for their efficacy in over twenty variations of cancer through different clinical trials. Studies on molecular interaction with existing PD-1/PD-L1 inhibitors that are mainly dominated by antibodies are constantly generating new ideas to develop novel inhibitors. This review has summarised information on reported and/or patented small molecules and peptides for their ability to interact with the PD-1/PD-L1 as a potential anticancer strategy.
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Abstract
Target identification presents one of the biggest challenges to chemical genomic approaches. In recent years, several methods have been applied for target identification and validation in plant cells. Here, we describe a label-free method based on the thermodynamic stabilization of a protein by interaction with a small-molecule ligand. With increasing temperature, proteins undergo thermal denaturation resulting in irreversible aggregation and precipitation. The binding of a small molecule to its target can enhance protein stability resulting in an increased temperature of aggregation (Tagg). This distinct increase in the temperature of aggregation known as a thermal shift can identify a compound-target protein interaction in high-throughput assays or, validate a predicted interaction.
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Affiliation(s)
- Cecilia Rodriguez-Furlan
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, CA, USA.
| | - Glenn R Hicks
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, CA, USA.,Uppsala Bio Center, Swedish University of Agricultural Sciences, Uppsala, Sweden
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24
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Burianova V, Kalinin S, Supuran CT, Krasavin M. Radiotracers for positron emission tomography (PET) targeting tumour-associated carbonic anhydrase isoforms. Eur J Med Chem 2020; 213:113046. [PMID: 33303236 DOI: 10.1016/j.ejmech.2020.113046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/20/2020] [Accepted: 11/22/2020] [Indexed: 12/11/2022]
Abstract
The tumour-associated, cell membrane-bound isoforms IX and XII of human carbonic anhydrase (CA, EC 4.2.1.1) are overexpressed in cancer cells contributing to the hypoxic tumour pH/metabolism regulating machinery and as thus, can serve as markers of malignant neoplastic tissue. Inhibitors of CAs can be employed both for the treatment of hypoxic tumours and in the design of radiotracers for positron emission tomography and imaging of such cancers. The present review provides a comprehensive summary of the progress achieved to-date in the field of developing PET-tracers based on monoclonal antibodies, biomolecules, and small-molecule ligands of CA IX and XII.
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Affiliation(s)
- Valeria Burianova
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Stanislav Kalinin
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Claudiu T Supuran
- Neurofarba Department, Section of Pharmaceutical Sciences, University of Florence, Florence, Italy.
| | - Mikhail Krasavin
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia.
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25
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Jayaprakash S, Le LTM, Sander B, Golas MM. Expression of the Neural REST/NRSF-SIN3 Transcriptional Corepressor Complex as a Target for Small-Molecule Inhibitors. Mol Biotechnol 2021; 63:53-62. [PMID: 33130996 DOI: 10.1007/s12033-020-00283-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2020] [Indexed: 10/23/2022]
Abstract
The repressor element 1 (RE1) silencing transcription factor/neuron-restrictive silencing factor (REST/NRSF) modulates the expression of genes with RE1/neuron-restrictive silencing element (RE1/NRSE) sites by recruiting the switch independent 3 (SIN3) factor and the REST corepressor (COREST) to its N and C-terminal repressor domain, respectively. Both, SIN3 and COREST assemble into protein complexes that are composed of multiple subunits including a druggable histone deacetylase (HDAC) enzyme. The SIN3 core complex comprises the eponymous proteins SIN3A or SIN3B, the catalytically active proteins HDAC1 or HDAC2, the histone chaperone retinoblastoma-associated protein 46/retinoblastoma-binding protein 7 (RBAP46/RBBP7) or RBAP48/RBBP4, the SIN3-associated protein 30 (SAP30), and the suppressor of defective silencing 3 (SDS3). Here, we overcome a bottleneck limiting the molecular characterization of the REST/NRSF-SIN3 transcriptional corepressor complex. To this end, SIN3 genes were amplified from the complementary DNA of neural stem/progenitor cells, and expressed in a baculovirus/insect cell expression system. We show that the isolates bind to DNA harboring RE1/NRSE sites and demonstrate that the histone deacetylase activity is blocked by small-molecule inhibitors. Thus, our isolates open up for future biomedical research on this critical transcriptional repressor complex and are envisioned as tool for drug testing.
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26
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Ma Z, Xiang X, Li S, Xie P, Gong Q, Goh BC, Wang L. Targeting hypoxia-inducible factor-1, for cancer treatment: Recent advances in developing small-molecule inhibitors from natural compounds. Semin Cancer Biol 2020; 80:379-390. [PMID: 33002608 DOI: 10.1016/j.semcancer.2020.09.011] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 09/06/2020] [Accepted: 09/17/2020] [Indexed: 12/24/2022]
Abstract
Rapid progress in molecular cancer biology coupled with the discovery of novel oncology drugs has opened new horizons for cancer target discovery. As one of the crucial signaling pathways related to tumorigenesis, hypoxia-inducible factor-1 (HIF-1) coordinates the activity of many transcription factors and their downstream molecules that impact tumor growth and metastasis. Accumulating evidence suggests that the transcriptional responses to acute hypoxia are mainly attributable to HIF-1α. Moreover, the overexpression of HIF-1α in several solid cancers has been found to be strongly associated with poor prognosis. Thus, pharmacological targeting of the HIF-1 signaling pathways has been considered as a new strategy for cancer therapy in the recent years. Although over the past decade, tremendous efforts have been made in preclinical studies to develop new HIF-1 inhibitors from natural products (reservoirs of novel therapeutic agents), to date, these efforts have not been successfully translated into clinically available treatments. In this review, we provide new insights into the bio-pharmacological considerations for selecting natural compounds as potential HIF-1 inhibitors to accelerate anti-cancer drug development. In addition, we highlighted the importance of assessing the dependency of cancer on HIF1A to shortlist cancer types as suitable disease models. This may subsequently lead to new paradigms for discovering more HIF-1 inhibitors derived from natural products and facilitate the development of potent therapeutic agents targeting specific cancer types.
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Affiliation(s)
- Zhaowu Ma
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, Hubei 434023, China; The First School of Clinical Medicine, Health Science Center, Yangtze University, Jingzhou, Hubei 434023k, China
| | - Xiaoqiang Xiang
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Shiya Li
- Dyson School of Design Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Peng Xie
- School of Pharmacy, Fudan University, Shanghai 201203, China; China State Institute of Pharmaceutical Industry, Shanghai 201203, China
| | - Quan Gong
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, Hubei 434023, China; The First School of Clinical Medicine, Health Science Center, Yangtze University, Jingzhou, Hubei 434023k, China.
| | - Boon-Cher Goh
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore; Department of Haematology-Oncology, National University Cancer Institute, Singapore 119228, Singapore; Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore.
| | - Lingzhi Wang
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore; Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore.
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27
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Lo CH, Pandey NK, Lim CKW, Ding Z, Tao M, Thomas DD, Langen R, Sachs JN. Discovery of Small Molecule Inhibitors of Huntingtin Exon 1 Aggregation by FRET-Based High-Throughput Screening in Living Cells. ACS Chem Neurosci 2020; 11:2286-2295. [PMID: 32568514 DOI: 10.1021/acschemneuro.0c00226] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Huntington's disease (HD) is the most common inherited neurodegenerative disorder and one of the nine polyglutamine (polyQ) diseases. HD is characterized by the pathological aggregation of the misfolded huntingtin exon 1 protein (Httex1) with abnormally long polyQ expansion due to genetic mutation. While there is currently no effective treatment for HD, inhibition of aggregate formation represents a direct approach in mediating the toxicity associated with Httex1 misfolding. To exploit this therapeutic window, we engineered two fluorescence resonance energy transfer (FRET) based biosensors that monitor the aggregation of Httex1 with different expanded Q-lengths (Q39 and Q72) in living cells. These FRET biosensors, together with a high-precision fluorescence lifetime detection platform, enable high-throughput screening of small molecules that target Httex1 aggregation. We found six small molecules that decreased the FRET of the biosensors and reduced Httex1-Q72-induced neuronal cytotoxicity in N2a cells with nanomolar potency. Using advanced SPR and EPR techniques, we confirmed that the compounds directly bind to Httex1 fibrils and inhibit aggregate formation. This strategy in targeting the Httex1 aggregates can be applicable to other proteins involved in polyQ related diseases.
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Affiliation(s)
- Chih Hung Lo
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Nitin K. Pandey
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, United States
| | - Colin Kin-Wye Lim
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Zhipeng Ding
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Meixin Tao
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, United States
| | - David D. Thomas
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Photonic Pharma LLC, Minneapolis, Minnesota 55410, United States
| | - Ralf Langen
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, United States
| | - Jonathan N. Sachs
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
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28
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Moodley S, Lian EY, Crupi MJF, Hyndman BD, Mulligan LM. RET isoform-specific interaction with scaffold protein Ezrin promotes cell migration and chemotaxis in lung adenocarcinoma. Lung Cancer 2020; 142:123-131. [PMID: 32146264 DOI: 10.1016/j.lungcan.2020.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/09/2020] [Accepted: 02/11/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Increased expression of REarranged during Transfection (RET) kinase is reported in 10-20 % of lung adenocarcinomas (LUAD) and is associated with metastasis and reduced survival. Ezrin is a scaffold protein that promotes protein interactions with the actin cytoskeleton to regulate cell migration and is also associated with invasion and metastasis in cancers. RET isoforms interact with unique combinations of scaffold proteins to promote distinct signaling pathways. We hypothesized that RET isoforms associate distinctly with Ezrin for cytoskeletal reorganization and LUAD cell migration processes. METHODS HCC1833 and A549 LUAD, SH-SY5Y neuroblastoma or HEK-293 cells expressing RET and Ezrin were stimulated with the RET ligand glial cell line-derived neurotrophic factor (GDNF) and treated with RET, Ezrin or Src inhibitors. Co-immunoprecipitation or pull-down assays coupled to immunoblotting were used to investigate protein activation and interactions. Immunofluorescence confocal microscopy assessed LUAD cytoskeletal reorganization and colocalization of RET and Ezrin. Live-cell fluorescence imaging was used to measure cell migration and chemotaxis. RESULTS GDNF promoted activation, interaction and colocalization of RET51 isoform and Ezrin. Inhibition of RET or Src impaired Ezrin interactions with RET and Src. GDNF stimulation enhanced the formation of actin-rich filopodia, in which both RET and Ezrin were enriched, and promoted chemotaxis in LUAD cells. However, inhibition of RET, Src or Ezrin suppressed filopodia formation, reduced colocalization of Ezrin with RET, and impaired cell migration and/ or chemotaxis. We further showed that GDNF-mediated activation of RET and Ezrin promoted RhoA-GTPase activity and signaling of ROCK1 and ROCK2 in LUAD cells. CONCLUSIONS Expression and activation of RET51 mediates unique protein interactions with Ezrin to promote LUAD cell chemotaxis for cancer cell dissemination, which may have implications in LUAD metastatic progression.
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Affiliation(s)
- Serisha Moodley
- Division of Cancer Biology and Genetics, Cancer Research Institute and Department of Pathology & Molecular Medicine, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Eric Y Lian
- Division of Cancer Biology and Genetics, Cancer Research Institute and Department of Pathology & Molecular Medicine, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Mathieu J F Crupi
- Division of Cancer Biology and Genetics, Cancer Research Institute and Department of Pathology & Molecular Medicine, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Brandy D Hyndman
- Division of Cancer Biology and Genetics, Cancer Research Institute and Department of Pathology & Molecular Medicine, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Lois M Mulligan
- Division of Cancer Biology and Genetics, Cancer Research Institute and Department of Pathology & Molecular Medicine, Queen's University, Kingston, ON, K7L 3N6, Canada.
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29
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Gibbons GS, Chakraborty A, Grigsby SM, Umeano AC, Liao C, Moukha-Chafiq O, Pathak V, Mathew B, Lee YT, Dou Y, Schürer SC, Reynolds RC, Snowden TS, Nikolovska-Coleska Z. Identification of DOT1L inhibitors by structure-based virtual screening adapted from a nucleoside-focused library. Eur J Med Chem 2020; 189:112023. [PMID: 31978781 DOI: 10.1016/j.ejmech.2019.112023] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 12/27/2019] [Accepted: 12/29/2019] [Indexed: 02/07/2023]
Abstract
Disruptor of Telomeric Silencing 1-Like (DOT1L), the sole histone H3 lysine 79 (H3K79) methyltransferase, is required for leukemogenic transformation in a subset of leukemias bearing chromosomal translocations of the Mixed Lineage Leukemia (MLL) gene, as well as other cancers. Thus, DOT1L is an attractive therapeutic target and discovery of small molecule inhibitors remain of high interest. Herein, we are presenting screening results for a unique focused library of 1200 nucleoside analogs originally produced under the aegis of the NIH Pilot Scale Library Program. The complete nucleoside set was screened virtually against DOT1L, resulting in 210 putative hits. In vitro screening of the virtual hits resulted in validation of 11 compounds as DOT1L inhibitors clustered into two distinct chemical classes, adenosine-based inhibitors and a new chemotype that lacks adenosine. Based on the developed DOT1L ligand binding model, a structure-based design strategy was applied and a second-generation of non-nucleoside DOT1L inhibitors was developed. Newly synthesized compound 25 was the most potent DOT1L inhibitor in the new series with an IC50 of 1.0 μM, showing 40-fold improvement in comparison with hit 9 and exhibiting reasonable on target effects in a DOT1L dependent murine cell line. These compounds represent novel chemical probes with a unique non-nucleoside scaffold that bind and compete with the SAM binding site of DOT1L, thus providing foundation for further medicinal chemistry efforts to develop more potent compounds.
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Affiliation(s)
- Garrett S Gibbons
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Molecular and Cellular Pathology Graduate Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Amarraj Chakraborty
- Department of Chemistry and Biochemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, AL, 35487, USA
| | - Sierrah M Grigsby
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Molecular and Cellular Pathology Graduate Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Afoma C Umeano
- Department of Molecular and Cellular Pharmacology, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Chenzhong Liao
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Omar Moukha-Chafiq
- Southern Research Institute, Drug Discovery Division, Birmingham, AL, 35205, USA
| | - Vibha Pathak
- Southern Research Institute, Drug Discovery Division, Birmingham, AL, 35205, USA
| | - Bini Mathew
- Southern Research Institute, Drug Discovery Division, Birmingham, AL, 35205, USA
| | - Young-Tae Lee
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Yali Dou
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Stephan C Schürer
- Department of Molecular and Cellular Pharmacology, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA; Center for Computational Science, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA; Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, FL, 33136, USA
| | - Robert C Reynolds
- Division of Hematology and Oncology, The University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Timothy S Snowden
- Department of Chemistry and Biochemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, AL, 35487, USA.
| | - Zaneta Nikolovska-Coleska
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Molecular and Cellular Pathology Graduate Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Rogel Cancer Center at University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
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Celegato M, Messa L, Goracci L, Mercorelli B, Bertagnin C, Spyrakis F, Suarez I, Cousido-Siah A, Travé G, Banks L, Cruciani G, Palù G, Loregian A. A novel small-molecule inhibitor of the human papillomavirus E6-p53 interaction that reactivates p53 function and blocks cancer cells growth. Cancer Lett 2019; 470:115-125. [PMID: 31693922 DOI: 10.1016/j.canlet.2019.10.046] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/29/2019] [Accepted: 10/30/2019] [Indexed: 12/16/2022]
Abstract
Despite prophylactic vaccination campaigns, human papillomavirus (HPV)-induced cancers still represent a major medical issue for global population, thus specific anti-HPV drugs are needed. Since the ability of HPV E6 oncoprotein to promote p53 degradation is linked to tumor progression, E6 has been proposed as an ideal target for cancer treatment. Using the crystal structure of the E6/E6AP/p53 complex, we performed an in silico screening of small-molecule libraries against a highly conserved alpha-helix in the N-terminal domain of E6 involved in the E6-p53 interaction. We discovered a compound able to inhibit the E6-mediated degradation of p53 through disruption of E6-p53 binding both in vitro and in cells. This compound could restore p53 intracellular levels and transcriptional activity, reduce the viability and proliferation of HPV-positive cancer cells, and block 3D cervospheres formation. Mechanistic studies revealed that the compound anti-tumor activity mainly relies on induction of cell cycle arrest and senescence. Our data demonstrate that the disruption of the direct E6-p53 interaction can be obtained with a small-molecule compound leading to specific antitumoral activity in HPV-positive cancer cells and thus represents a new approach for anti-HPV drug development.
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Affiliation(s)
- Marta Celegato
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Lorenzo Messa
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Laura Goracci
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy; Consortium for Computational Molecular and Materials Sciences, Perugia, Italy.
| | | | - Chiara Bertagnin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Francesca Spyrakis
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | - Irina Suarez
- Équipe Labellisée Ligue 2015, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | - Alexandra Cousido-Siah
- Équipe Labellisée Ligue 2015, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | - Gilles Travé
- Équipe Labellisée Ligue 2015, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | - Lawrence Banks
- International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
| | - Gabriele Cruciani
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy; Consortium for Computational Molecular and Materials Sciences, Perugia, Italy
| | - Giorgio Palù
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Arianna Loregian
- Department of Molecular Medicine, University of Padova, Padova, Italy.
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Lo CH, Lim CKW, Ding Z, Wickramasinghe SP, Braun AR, Ashe KH, Rhoades E, Thomas DD, Sachs JN. Targeting the ensemble of heterogeneous tau oligomers in cells: A novel small molecule screening platform for tauopathies. Alzheimers Dement 2019; 15:1489-1502. [PMID: 31653529 DOI: 10.1016/j.jalz.2019.06.4954] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 05/30/2019] [Accepted: 06/19/2019] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Understanding the heterogeneous pathology in Alzheimer's disease and related tauopathies is one of the most urgent and fundamental challenges facing the discovery of novel disease-modifying therapies. Through monitoring ensembles of toxic and nontoxic tau oligomers spontaneously formed in cells, our biosensor technology can identify tool compounds that modulate tau oligomer structure and toxicity, providing much needed insight into the nature and properties of toxic tau oligomers. BACKGROUND Tauopathies are a group of neurodegenerative disorders characterized by pathologic aggregation of the microtubule binding protein tau. Recent studies suggest that tau oligomers are the primary toxic species in tauopathies. NEW/UPDATED HYPOTHESIS We hypothesize that tau biosensors capable of monitoring tau oligomer conformation are able to identify tool compounds that modulate the structure and conformation of these tau assemblies, providing key insight into the unique structural fingerprints of toxic tau oligomers. These fingerprints will provide gravely needed biomarker profiles to improve staging of early tauopathy pathology and generate lead compounds for potential new therapeutics. Our time-resolved fluorescence resonance energy transfer biosensors provide us an exquisitely sensitive technique to monitor minute structural changes in monomer and oligomer conformation. In this proof-of-concept study, we identified a novel tool compound, MK-886, which directly binds tau, perturbs the conformation of toxic tau oligomers, and rescues tau-induced cytotoxicity. Furthermore, we show that MK-886 alters the conformation of tau monomer at the proline-rich and microtubule binding regions, stabilizing an on-pathway oligomer. MAJOR CHALLENGES FOR THE HYPOTHESIS Our approach monitors changes in the ensemble of assemblies that are spontaneously formed in cells but does not specifically isolate or enrich unique toxic tau species. However, time-resolved fluorescence resonance energy transfer does not provide high-resolution, atomic scale information, requiring additional experimental techniques to resolve the structural features stabilized by different tool compounds. LINKAGE TO OTHER MAJOR THEORIES Our biosensor technology is broadly applicable to other areas of tauopathy therapeutic development. These biosensors can be readily modified for different isoforms of tau, specific post-translational modifications, and familial Alzheimer's disease-associated mutations. We are eager to explore tau interactions with chaperone proteins, monitor cross-reactivity with other intrinsically disordered proteins, and target seeded oligomer pathology.
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Affiliation(s)
- Chih Hung Lo
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA
| | - Colin Kin-Wye Lim
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA
| | - Zhipeng Ding
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA
| | - Sanjula P Wickramasinghe
- Biochemistry and Molecular Biophysics Graduate Group, University of Pennsylvania, Philadelphia, PA, USA
| | - Anthony R Braun
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA
| | - Karen H Ashe
- Department of Neurology, University of Minnesota, Minneapolis, MN, USA; Department of Neuroscience, University of Minnesota, Minneapolis, MN, USA; N. Bud Grossman Center for Memory Research and Care, University of Minnesota, Minneapolis, MN, USA; Geriatric Research, Education, and Clinical Centers, Veterans Affairs Medical Center, Minneapolis, MN, USA
| | - Elizabeth Rhoades
- Biochemistry and Molecular Biophysics Graduate Group, University of Pennsylvania, Philadelphia, PA, USA; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA
| | - David D Thomas
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA; Photonic Pharma LLC, Minneapolis, MN, USA
| | - Jonathan N Sachs
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA.
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Mabonga L, Kappo AP. Protein-protein interaction modulators: advances, successes and remaining challenges. Biophys Rev 2019; 11:559-581. [PMID: 31301019 DOI: 10.1007/s12551-019-00570-x] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 06/24/2019] [Indexed: 12/12/2022] Open
Abstract
Modulating disease-relevant protein-protein interactions (PPIs) using small-molecule inhibitors is a quite indispensable diagnostic and therapeutic strategy in averting pathophysiological cues and disease progression. Over the years, targeting intracellular PPIs as drug design targets has been a challenging task owing to their highly dynamic and expansive interfacial areas (flat, featureless and relatively large). However, advances in PPI-focused drug discovery technology have been reported and a few drugs are already on the market, with some potential drug-like candidates already in clinical trials. In this article, we review the advances, successes and remaining challenges in the application of small molecules as valuable PPI modulators in disease diagnosis and therapeutics.
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Affiliation(s)
- Lloyd Mabonga
- Biotechnology and Structural Biology (BSB) Group, Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, 3886, South Africa
| | - Abidemi Paul Kappo
- Biotechnology and Structural Biology (BSB) Group, Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, 3886, South Africa.
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33
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Yan XQ, Wang ZC, Qi PF, Li G, Zhu HL. Design, synthesis and biological evaluation of 2-H pyrazole derivatives containing morpholine moieties as highly potent small molecule inhibitors of APC-Asef interaction. Eur J Med Chem 2019; 177:425-447. [PMID: 31158755 DOI: 10.1016/j.ejmech.2019.05.056] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 05/02/2019] [Accepted: 05/19/2019] [Indexed: 11/15/2022]
Abstract
Mutated adenomatous polyposis coli (APC) selectively combining with Asef has been reported to be implicated in promoting colon cancer proliferation, invasion and metastasis in several cancer biotherapy studies. However, there were universally resistance and harsh terms in disrupting APC-Asef interaction in biotherapy. Under the circumstances small-molecule inhibitors as the new APC interface could resolve the problems. In this research, a series of novel dihydropyrazole derivatives containing morpholine as high potent interaction inhibitors between APC and Asef were first synthesized after selection by means of docking simulation and virtual screening. Afterwards they were evaluated interaction inhibition of APC-Asef and pharmacological efficiency both in vitro and in vivo utilizing orthotopic transplantation model with multi-angle of view. Among them, compound 7g exhibited most excellent anti-proliferation activities against HCT116 cells with IC50 of 0.10 ± 0.01 μM than Regorafenib (IC50 = 0.16 ± 0.04 μM). The results favored our rational design intention and provides a new class of small-molecule inhibitors available for the development of colon tumor therapeutics targeting APC-Asef interaction inhibitions.
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Affiliation(s)
- Xiao-Qiang Yan
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, PR China; Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
| | - Zhong-Chang Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, PR China.
| | - Peng-Fei Qi
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, PR China
| | - Guigen Li
- Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, PR China.
| | - Hai-Liang Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, PR China.
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Pinto F, Suzuki D, Senoo M. Long-Term Expansion of Mouse Primary Epidermal Keratinocytes Using a TGF-β Signaling Inhibitor. Methods Mol Biol 2019; 1993:47-59. [PMID: 31148077 DOI: 10.1007/978-1-4939-9473-1_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Mouse models have been used to study the physiology and pathogenesis of the skin. However, propagation of mouse primary epidermal keratinocytes remains challenging. In this chapter, we introduce a newly developed protocol that enables long-term expansion of p63+ mouse epidermal keratinocytes in low-Ca2+ media without the need of progenitor cell purification steps or support by a feeder cell layer. Pharmacological inhibition of TGF-β signaling in crude preparations of mouse epidermis robustly increases proliferative capacity of p63+ epidermal progenitor cells while preserving their ability to differentiate. Suppression of TGF-β signaling also permits p63+ epidermal keratinocytes to form macroscopically large clones in 3T3-J2 feeder cell co-culture. This simple and efficient approach will facilitate the use of mouse models by providing p63+ primary epidermal keratinocytes in quantity.
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35
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Steigerwald C, Rasenberger B, Christmann M, Tomicic MT. Sensitization of colorectal cancer cells to irinotecan by the Survivin inhibitor LLP3 depends on XAF1 proficiency in the context of mutated p53. Arch Toxicol 2018; 92:2645-8. [PMID: 29947891 DOI: 10.1007/s00204-018-2240-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 06/05/2018] [Indexed: 10/14/2022]
Abstract
Survivin is a well-established target in experimental cancer therapy. While hardly expressed in normal tissues, it is over-expressed in most human tumors, including colorectal cancer (CRC). Different compartmentalization of Survivin enables its multiple functions as a key controller of cell division, apoptosis, stress-induced signaling and also of migration and metastasis. Because of the lack of its enzymatic activity, this oncoprotein is considered to be undruggable. Nevertheless, small-molecule interfacial inhibitors interfering with its dimerization and/or disrupting the Survivin-Ran protein complex were shown to be potent drugs causing Survivin proteasomal degradation and inducing apoptosis in cancer cells. Based on our results with different CRC cell lines, we show that the Survivin inhibitor LLP3 might be effective as mono-therapy in the subgroup of p53-proficient and also some p53-mutated tumors, independent of mismatch repair status. When combined with irinotecan, expression of the tumor suppressor X-linked inhibitor of apoptosis factor 1 (XAF1) plays a decisive role for sensitization of CRC cells to this first-line drug, however, only in the p53-mutated background. The combination treatment with IT should be avoided in p53-proficient tumors independent of XAF1 expression, since no sensitization to or even protection against moderate-toxic concentrations of IT might occur.
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Abstract
Cancer immunotherapy has been increasingly utilised to treat advanced malignancies. The signalling network of immune checkpoints has attracted considerable attention. Immune checkpoint inhibitors are revolutionising the treatment options and expectations for patients with cancer. The reported clinical success of targeting the T-cell immune checkpoint receptors PD-1/PD-L1 has demonstrated the importance of immune modulation. Indeed, antibodies binding to PD-1 or PD-L1 have shown remarkable efficacy. However, antibody drugs have many disadvantages, such as their production cost, stability, and immunogenicity and, therefore, small-molecule inhibitors of PD-1 and its ligand PD-L1 are being introduced. Small-molecule inhibitors could offer inherent advantages in terms of pharmacokinetics and druggability, thereby providing additional methods for cancer treatment and achieving better therapeutic effects. In this review, we first discuss how PD-1/PD-L1-targeting inhibitors modulate the relationship between immune cells and tumour cells in tumour immunotherapy. Second, we discuss how the immunomodulatory potential of these inhibitors can be exploited via rational combinations with immunotherapy and targeted therapy. Third, this review is the first to summarise the current clinical and preclinical evidence regarding small-molecule inhibitors of the PD-1/PD-L1 immune checkpoint, considering features and responses related to the tumours and to the host immune system.
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Affiliation(s)
- Kui Li
- a Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine , Chinese Academy of Medical Science & Peking Union Medical College , Tianjin , China
| | - Hongqi Tian
- a Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine , Chinese Academy of Medical Science & Peking Union Medical College , Tianjin , China
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Reinwald M, Silva JT, Mueller NJ, Fortún J, Garzoni C, de Fijter JW, Fernández-Ruiz M, Grossi P, Aguado JM. ESCMID Study Group for Infections in Compromised Hosts (ESGICH) Consensus Document on the safety of targeted and biological therapies: an infectious diseases perspective (Intracellular signaling pathways: tyrosine kinase and mTOR inhibitors). Clin Microbiol Infect 2018; 24 Suppl 2:S53-S70. [PMID: 29454849 DOI: 10.1016/j.cmi.2018.02.009] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 02/08/2018] [Accepted: 02/11/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND The present review is part of the European Society of Clinical Microbiology and Infectious Diseases (ESCMID) Study Group for Infections in Compromised Hosts (ESGICH) Consensus Document on the safety of targeted and biologic therapies. AIMS To review, from an infectious diseases perspective, the safety profile of therapies targeting different intracellular signaling pathways and to suggest preventive recommendations. SOURCES Computer-based Medline searches with MeSH terms pertaining to each agent or therapeutic family. CONTENT Although BCR-ABL tyrosine kinase inhibitors modestly increase the overall risk of infection, dasatinib has been associated with cytomegalovirus and hepatitis B virus reactivation. BRAF/MEK kinase inhibitors do not significantly affect infection susceptibility. The effect of Bruton tyrosine kinase inhibitors (ibrutinib) among patients with B-cell malignancies is difficult to distinguish from that of previous immunosuppression. However, cases of Pneumocystis jirovecii pneumonia (PCP), invasive fungal infection and progressive multifocal leukoencephalopathy have been occasionally reported. Because phosphatidylinositol-3-kinase inhibitors (idelalisib) may predispose to opportunistic infections, anti-Pneumocystis prophylaxis and prevention strategies for cytomegalovirus are recommended. No increased rates of infection have been observed with venetoclax (antiapoptotic protein Bcl-2 inhibitor). Therapy with Janus kinase inhibitors markedly increases the incidence of infection. Pretreatment screening for chronic hepatitis B virus and latent tuberculosis infection must be performed, and anti-Pneumocystis prophylaxis should be considered for patients with additional risk factors. Cancer patients receiving mTOR inhibitors face an increased incidence of overall infection, especially those with additional risk factors (prior therapies or delayed wound healing). IMPLICATIONS Specific preventive approaches are warranted in view of the increased risk of infection associated with some of the reviewed agents.
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Affiliation(s)
- M Reinwald
- Department of Hematology and Oncology, Klinikum Brandenburg, Medizinische Hochschule Brandenburg Theodor Fontane, Brandenburg an der Havel, Germany.
| | - J T Silva
- Department of Infectious Diseases, University Hospital of Badajoz, Fundación para la Formación e Investigación de los Profesionales de la Salud (FundeSalud), Badajoz, Spain
| | - N J Mueller
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - J Fortún
- Department of Infectious Diseases, Hospital Universitario 'Ramon y Cajal', Madrid, Spain; Spanish Network for Research in Infectious Diseases (REIPI RD16/0016), Instituto de Salud Carlos III, Madrid, Spain
| | - C Garzoni
- Department of Internal Medicine, Clinica Luganese, Lugano, Switzerland; Department of Infectious Disease, Clinica Luganese, Lugano, Switzerland
| | - J W de Fijter
- Department of Medicine, Division of Nephrology, Leiden University Medical Centre, Leiden, The Netherlands
| | - M Fernández-Ruiz
- Unit of Infectious Diseases, Hospital Universitario '12 de Octubre', Instituto de Investigación Hospital '12 de Octubre' (i+12), School of Medicine, Universidad Complutense, Madrid, Spain; Spanish Network for Research in Infectious Diseases (REIPI RD16/0016), Instituto de Salud Carlos III, Madrid, Spain
| | - P Grossi
- Department of Infectious and Tropical Diseases, University of Insubria, Ospedale di Circolo-Fondazioni Macchi, Varese, Italy
| | - J M Aguado
- Unit of Infectious Diseases, Hospital Universitario '12 de Octubre', Instituto de Investigación Hospital '12 de Octubre' (i+12), School of Medicine, Universidad Complutense, Madrid, Spain; Spanish Network for Research in Infectious Diseases (REIPI RD16/0016), Instituto de Salud Carlos III, Madrid, Spain
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Aguilar-Company J, Fernández-Ruiz M, García-Campelo R, Garrido-Castro AC, Ruiz-Camps I. ESCMID Study Group for Infections in Compromised Hosts (ESGICH) Consensus Document on the safety of targeted and biological therapies: an infectious diseases perspective (Cell surface receptors and associated signaling pathways). Clin Microbiol Infect 2018; 24 Suppl 2:S41-S52. [PMID: 29426804 DOI: 10.1016/j.cmi.2017.12.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/18/2017] [Accepted: 12/30/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND The present review is part of the European Society of Clinical Microbiology and Infectious Diseases (ESCMID) Study Group for Infections in Compromised Hosts (ESGICH) consensus document on the safety of targeted and biologic therapies. AIMS To review, from an infectious diseases perspective, the safety profile of therapies targeting cell surface receptors and associated signaling pathways among cancer patients and to suggest preventive recommendations. SOURCES Computer-based Medline searches with MeSH terms pertaining to each agent or therapeutic family. CONTENT Vascular endothelial growth factor (VEGF)-targeted agents (bevacizumab and aflibercept) are associated with a meaningful increase in the risk of infection, likely due to drug-induced neutropaenia, although no clear benefit is expected from the universal use of anti-infective prophylaxis. VEGF tyrosine kinase inhibitors (i.e. sorafenib or sunitinib) do not seem to significantly affect host's susceptibility to infection, and universal anti-infective prophylaxis is not recommended either. Anti-epidermal growth factor receptor (EGFR) monoclonal antibodies (cetuximab or panitumumab) induce neutropaenia and secondary skin and soft tissue infection in cases of severe papulopustular rash. Systemic antibiotics (doxycycline or minocycline) should be administered to prevent the latter complication, whereas no recommendation can be established on the benefit from antiviral, antifungal or anti-Pneumocystis prophylaxis. A lower risk of infection is reported for anti-ErbB2/HER2 monoclonal antibodies (trastuzumab and pertuzumab) and ErbB receptor tyrosine kinase inhibitors (including dual-EGFR/ErbB2 inhibitors such as lapatinib or neratinib) compared to conventional chemotherapy, presumably as a result of the decreased occurrence of drug-induced neutropaenia. IMPLICATIONS With the exception of VEGF-targeted agents, the overall risk of infection associated with the reviewed therapies seems to be low.
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Affiliation(s)
- J Aguilar-Company
- Departments of Infectious Diseases and Oncology, University Hospital Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain
| | - M Fernández-Ruiz
- Unit of Infectious Diseases, Hospital Universitario '12 de Octubre', Instituto de Investigación Hospital '12 de Octubre' (i + 12), School of Medicine, Universidad Complutense, Madrid, Spain; Spanish Network for Research in Infectious Diseases (REIPI RD16/0016), Instituto de Salud Carlos III, Madrid, Spain
| | - R García-Campelo
- Department of Medical Oncology, Complejo Hospitalario Universitario A Coruña, A Coruña, Spain
| | - A C Garrido-Castro
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - I Ruiz-Camps
- Department of Infectious Diseases, University Hospital Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain; Spanish Network for Research in Infectious Diseases (REIPI RD16/0016), Instituto de Salud Carlos III, Madrid, Spain.
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Cai S, Shum DKY, Chan YS. Human Induced Pluripotent Stem Cell-Derived Sensory Neurons for Fate Commitment of Bone Marrow Stromal Cell-Derived Schwann Cells. Methods Mol Biol 2018; 1739:149-160. [PMID: 29546706 DOI: 10.1007/978-1-4939-7649-2_10] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Here we describe the in vitro derivation of sensory neurons for use in effecting fate commitment of Schwann cell-like cells derived from human bone marrow stromal cells (hBMSCs). We adopt a novel combination of small molecules in an 8-day program that induces the differentiation of human induced pluripotent stem cells into sensory neurons. In co-cultures, the derived sensory neurons present contact-dependent cues to direct hBMSC-derived Schwann cell-like cells toward the Schwann cell fate. These derived human Schwann cells survive passaging and cryopreservation, retain marker expression despite withdrawal of glia-inducing medium and neuronal cues, demonstrate capacity for myelination, and therefore promise application in autologous transplantation and re-myelination therapy.
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Affiliation(s)
- Sa Cai
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Daisy K Y Shum
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | - Ying-Shing Chan
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
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40
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Abstract
Allosteric interactions of the molecular chaperone Hsp90 with a diverse array of cochaperones and client proteins, such as protein kinases and transcription factors, allow for efficient molecular communication in signal transduction networks. Deregulation of pathways involving these proteins is commonly associated with cancer pathologies and allosteric inhibition of oncogenic clients by targeting Hsp90 provides a powerful therapeutic strategy in cancer research. We review several validated computational approaches and tools used in the studies of the Hsp90 interactions with proteins and small molecules. These methods include experimentally guided docking to predict Hs90-protein interactions, molecular and binding free energy simulations to analyze Hsp90 binding with small molecules, and structure-based network modeling to evaluate allosteric interactions and communications in the Hsp90 regulatory complexes. Through the lens of allosteric-centric view on Hsp90 function and regulation, we discuss newly emerging computational tools that link protein structure modeling with biophysical simulations and network-based systems biology approaches.
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Affiliation(s)
- Gennady M Verkhivker
- Schmid College of Science and Technology, Chapman University, University Drive, Orange, CA, 92866, USA.
- Chapman University School of Pharmacy, Irvine, CA, USA.
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41
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Abstract
Protein-protein interaction (PPI) inhibitors are a rapidly expanding class of therapeutics. Recent advances in our understanding of PPIs and success of early examples of PPI inhibitors demonstrate the feasibility of targeting PPIs. This review summarizes the techniques used for the discovery and optimization of a diverse set PPI inhibitors, focusing on the development of PPI inhibitors as new antibacterial and antiviral agents. We close with a summary of the advances responsible for making PPI inhibitors realistic targets for therapeutic intervention and brief outlook of the field.
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Affiliation(s)
- Andrew F Voter
- University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - James L Keck
- University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.
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42
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Abstract
Kinase pathways are primary effectors of many targeted therapy approaches for cancer. Kinase pathways can be dysregulated by mechanisms far more diverse than chromosomal rearrangements or point mutations, which drove the initial application of kinase inhibitors to cancer. Functional screening with kinase inhibitors is one tool by which we can understand the diversity of target kinases and candidate drugs for patients before fully understanding the mechanistic rationale for kinase pathway dysregulation. By combining functional screening with genomic data, it is also possible to accelerate understanding of these mechanistic underpinnings.
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Affiliation(s)
- Jeffrey W Tyner
- Department of Cell, Developmental and Cancer Biology, Knight Cancer Institute, Oregon Health and Science University, OHSU BRB 511, Mailcode L592, 3181 Southwest Sam Jackson Park Road, Portland, OR 97239, USA.
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43
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Kubiński K, Masłyk M, Orzeszko A. Benzimidazole inhibitors of protein kinase CK2 potently inhibit the activity of atypical protein kinase Rio1. Mol Cell Biochem 2016; 426:195-203. [PMID: 27909846 PMCID: PMC5290066 DOI: 10.1007/s11010-016-2892-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 11/25/2016] [Indexed: 11/24/2022]
Abstract
Benzimidazole derivatives of 5,6-dichlorobenzimidazole 1-β-d-ribofuranoside (DRB) comprise the important class of protein kinase CK2 inhibitors. Depending on the structure, benzimidazoles inhibit CK2 with different selectivity and potency. Besides CK2, the compounds can inhibit, with similar activity, other classical eukaryotic protein kinases (e.g. PIM, DYRK, and PKD). The present results show that a majority of the most common CK2 inhibitors can affect the atypical kinase Rio1 in a nanomolar range. Kinetic data confirmed the mode of action of benzimidazoles as typical ATP-competitive inhibitors. In contrast to toyocamycin—the first discovered small-molecule inhibitor of Rio1—the most potent representative of benzimidazoles TIBI (IC50 = 0.09 µM, Ki = 0.05 µM) does not influence the oligomeric state of the Rio1 kinase. Docking studies revealed that TIBI can occupy the ATP-binding site of Rio1 in a manner similar to toyocamycin, and enhances the thermostability of the enzyme.
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Affiliation(s)
- Konrad Kubiński
- Department of Molecular Biology, Institute of Biotechnology, The John Paul II Catholic University of Lublin, ul. Konstantynów 1i, 20-708, Lublin, Poland
| | - Maciej Masłyk
- Department of Molecular Biology, Institute of Biotechnology, The John Paul II Catholic University of Lublin, ul. Konstantynów 1i, 20-708, Lublin, Poland.
| | - Andrzej Orzeszko
- Institute of Chemistry, Warsaw Life Sciences University, ul. Nowoursynowska 159c, 02-787, Warsaw, Poland
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44
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Cai S, Han L, Ao Q, Chan Y, Shum DK. Human Induced Pluripotent Cell-Derived Sensory Neurons for Fate Commitment of Bone Marrow-Derived Schwann Cells: Implications for Remyelination Therapy. Stem Cells Transl Med 2016; 6:369-381. [PMID: 28191772 PMCID: PMC5442799 DOI: 10.5966/sctm.2015-0424] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 08/09/2016] [Indexed: 02/07/2023] Open
Abstract
Strategies that exploit induced pluripotent stem cells (iPSCs) to derive neurons have relied on cocktails of cytokines and growth factors to bias cell‐signaling events in the course of fate choice. These are often costly and inefficient, involving multiple steps. In this study, we took an alternative approach and selected 5 small‐molecule inhibitors of key signaling pathways in an 8‐day program to induce differentiation of human iPSCs into sensory neurons, reaching ≥80% yield in terms of marker proteins. Continuing culture in maintenance medium resulted in neuronal networks immunopositive for synaptic vesicle markers and vesicular glutamate transporters suggestive of excitatory neurotransmission. Subpopulations of the derived neurons were electrically excitable, showing tetrodotoxin‐sensitive action potentials in patch‐clamp experiments. Coculture of the derived neurons with rat Schwann cells under myelinating conditions resulted in upregulated levels of neuronal neuregulin 1 type III in conjunction with the phosphorylated receptors ErbB2 and ErbB3, consistent with amenability of the neuritic network to myelination. As surrogates of embryonic dorsal root ganglia neurons, the derived sensory neurons provided contact‐dependent cues to commit bone marrow‐derived Schwann cell‐like cells to the Schwann cell fate. Our rapid and efficient induction protocol promises not only controlled differentiation of human iPSCs into sensory neurons, but also utility in the translation to a protocol whereby human bone marrow‐derived Schwann cells become available for autologous transplantation and remyelination therapy. Stem Cells Translational Medicine2017;6:369–381
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Affiliation(s)
- Sa Cai
- School of Biomedical Sciences, University of Hong Kong, Hong Kong, People's Republic of China
- Research Centre of Heart, Brain, Hormone, and Healthy Aging, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, People's Republic of China
| | - Lei Han
- School of Biomedical Sciences, University of Hong Kong, Hong Kong, People's Republic of China
- Research Centre of Heart, Brain, Hormone, and Healthy Aging, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, People's Republic of China
| | - Qiang Ao
- Department of Neurosurgery, Yuquan Hospital, Tsinghua University, Beijing, People's Republic of China
| | - Ying‐Shing Chan
- School of Biomedical Sciences, University of Hong Kong, Hong Kong, People's Republic of China
- Research Centre of Heart, Brain, Hormone, and Healthy Aging, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, People's Republic of China
- State Key Laboratory of Brain and Cognitive Sciences, University of Hong Kong, Hong Kong, People's Republic of China
| | - Daisy Kwok‐Yan Shum
- School of Biomedical Sciences, University of Hong Kong, Hong Kong, People's Republic of China
- Research Centre of Heart, Brain, Hormone, and Healthy Aging, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, People's Republic of China
- State Key Laboratory of Brain and Cognitive Sciences, University of Hong Kong, Hong Kong, People's Republic of China
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45
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Schaap MC, Guimarães AM, Wilderspin AF, Wells G. Protocol for a Steady-State FRET Assay in Cancer Chemoprevention. Methods Mol Biol 2016; 1379:165-79. [PMID: 26608299 DOI: 10.1007/978-1-4939-3191-0_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Cancer chemoprevention is an important strategy to prevent, reverse, or suppress the development of cancer. One of the target pathways that has emerged in recent years is the Keap1-Nrf2-ARE system that regulates the protection of cells against various carcinogens and their metabolites. Increased concentrations of the redox transcription factor nuclear factor erythroid 2-related factor 2 (Nrf2) induces the activation of antioxidant and phase 2 detoxifying genes. Nrf2 is regulated by substrate adaptor protein Kelch-like ECH-associated protein 1 (Keap1) that can target Nrf2 for ubiquitination and degradation by the proteasome. The interaction between Nrf2 and Keap1 can be disrupted at the protein-protein interface in order to increase Nrf2 activity for potential therapeutic purposes. This chapter describes a protocol for a steady-state fluorescence or Förster resonance energy transfer (FRET) assay to examine the Keap1-Nrf2 protein-protein interaction (PPI), to investigate the effects of Nrf2 mutations on Keap1 binding and finally to identify potential inhibitors of this PPI. In the assay system Keap1 is conjugated to an YFP protein at the N-terminus whereas an Nrf2-derived 16-mer peptide containing a high-affinity "ETGE" motif is conjugated to a CFP protein at the N-terminus.
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46
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Ebrahim AS, Sabbagh H, Liddane A, Raufi A, Kandouz M, Al-Katib A. Hematologic malignancies: newer strategies to counter the BCL-2 protein. J Cancer Res Clin Oncol 2016; 142:2013-22. [PMID: 27043233 DOI: 10.1007/s00432-016-2144-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 03/09/2016] [Indexed: 12/23/2022]
Abstract
INTRODUCTION BCL-2 is the founding member of the BCL-2 family of apoptosis regulatory proteins that either induce (pro-apoptotic) or inhibit (anti-apoptotic) apoptosis. The anti-apoptotic BCL-2 is classified as an oncogene, as damage to the BCL-2 gene has been shown to cause a number of cancers, including lymphoma. Ongoing research has demonstrated that disruption of BCL-2 leads to cell death. BCL-2 is also known to be involved in the development of resistance to chemotherapeutic agents, further underscoring the importance of targeting the BCL-2 gene in cancer therapeutics. Thus, numerous approaches have been developed to block or modulate the production of BCL-2 at the RNA level using antisense oligonucleotides or at the protein level with BCL-2 inhibitors, such as the novel ABT737. METHODS In this article, we briefly review previous strategies to target the BCL-2 gene and focus on a new approach to silence DNA, DNA interference (DNAi). RESULTS AND CONCLUSION DNA interference is aimed at blocking BCL-2 gene transcription. Evaluations of this technology in preclinical and early clinical studies are very encouraging and strongly support further development of DNAi as cancer therapeutics. A pilot phase II clinical trial in patients with relapsed or refractory non-Hodgkin lymphoma, PNT2258 demonstrated clinical benefit in 11 of 13 patients with notable responses in diffuse large B cell lymphoma and follicular lymphoma. By targeting the DNA directly, the DNAi technology promises to be more effective compared with other gene-interference strategies that target the RNA or protein but leaves the dysregulated DNA functional.
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Affiliation(s)
- Abdul Shukkur Ebrahim
- Department of Internal Medicine-Lymphoma Research Lab, Wayne State University and School of Medicine, 8229 Scott Hall, 540 E. Canfield, Detroit, MI, 48201, USA
| | - Hussam Sabbagh
- Department of Internal Medicine-Lymphoma Research Lab, Wayne State University and School of Medicine, 8229 Scott Hall, 540 E. Canfield, Detroit, MI, 48201, USA
| | - Allison Liddane
- Department of Internal Medicine-Lymphoma Research Lab, Wayne State University and School of Medicine, 8229 Scott Hall, 540 E. Canfield, Detroit, MI, 48201, USA
| | - Ali Raufi
- Department of Internal Medicine-Lymphoma Research Lab, Wayne State University and School of Medicine, 8229 Scott Hall, 540 E. Canfield, Detroit, MI, 48201, USA
| | - Mustapha Kandouz
- Department of Pathology, Wayne State University, Detroit, MI, 48201, USA
| | - Ayad Al-Katib
- Department of Internal Medicine-Lymphoma Research Lab, Wayne State University and School of Medicine, 8229 Scott Hall, 540 E. Canfield, Detroit, MI, 48201, USA.
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47
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Abstract
Compounds that affect enzymatic function of kinases are valuable for the understanding of the complex biochemical processes in cells. Aurora kinases (AURKs) play a key role in the control of the mitosis. These kinases are frequently deregulated in different human cancers: overexpression, amplifications, translocations and deletions were reported in many cancer cell lines as well as patient tissues. These findings steered a rigorous hunt for small-molecule AURK inhibitors not only for research purposes as well as for therapeutic uses. In this review, we describe a number of AURK inhibitors and their use in cancer research and/or therapy. We hope to assist researchers and clinicians in deciding which inhibitor is most appropriate for their specific purpose. The review will also provide a broad overview of the clinical studies performed with some of these inhibitors (if such studies have been performed).
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48
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Austin S, Taouji S, Chevet E, Wodrich H, Rayne F. Using AlphaScreen(®) to Identify Small-Molecule Inhibitors Targeting a Conserved Host-Pathogen Interaction. Methods Mol Biol 2016; 1449:453-67. [PMID: 27613056 DOI: 10.1007/978-1-4939-3756-1_30] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
AlphaScreen(®) is a technology particularly suitable for bi-molecular inhibitor screening assays, e.g. using protein-protein interactions with purified recombinant proteins. Each binding partner of the bi-molecular interaction is coupled either to donor or to acceptor beads. The technology is based on the quantifiable transfer of oxygen singlets from donor to acceptor microbeads brought together by a specific interaction between the partners. We identified the conserved interaction between WW domains of cellular ubiquitin ligases of the Nedd4 family and a short peptide motif (PPxY) present in several structural and non-structural viral proteins as a potential drug target. Using an AlphaScreen assay recapitulating the interaction between Nedd4.2 and the PPxY motif of the adenoviral capsid protein VI, we screened a library of small molecules and identified specific inhibitors of this interaction.
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Affiliation(s)
- Sisley Austin
- Intracellular Transport of Viral Structures, MFP CNRS UMR 5234, University of Bordeaux, 146 rue Leo Saignat, Bat. 3A, 3eme etage, Bordeaux, 33076, France
| | - Saïd Taouji
- BMY Screen, 229 Cours De L'argonne, Bordeaux, 33076, France
| | - Eric Chevet
- Inserm ERL440 "Oncogenesis Stress Signaling", Université Rennes 1, Rennes, France.,Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France
| | - Harald Wodrich
- Intracellular Transport of Viral Structures, MFP CNRS UMR 5234, University of Bordeaux, 146 rue Leo Saignat, Bat. 3A, 3eme etage, Bordeaux, 33076, France.
| | - Fabienne Rayne
- Intracellular Transport of Viral Structures, MFP CNRS UMR 5234, University of Bordeaux, 146 rue Leo Saignat, Bat. 3A, 3eme etage, Bordeaux, 33076, France
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49
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Boons E, Vanstreels E, Jacquemyn M, Nogueira TC, Neggers JE, Vercruysse T, van den Oord J, Tamir S, Shacham S, Landesman Y, Snoeck R, Pannecouque C, Andrei G, Daelemans D. Human Exportin-1 is a Target for Combined Therapy of HIV and AIDS Related Lymphoma. EBioMedicine 2015; 2:1102-13. [PMID: 26501108 PMCID: PMC4588406 DOI: 10.1016/j.ebiom.2015.07.041] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/29/2015] [Accepted: 07/29/2015] [Indexed: 11/12/2022] Open
Abstract
Infection with HIV ultimately leads to advanced immunodeficiency resulting in an increased incidence of cancer. For example primary effusion lymphoma (PEL) is an aggressive non-Hodgkin lymphoma with very poor prognosis that typically affects HIV infected individuals in advanced stages of immunodeficiency. Here we report on the dual anti-HIV and anti-PEL effect of targeting a single process common in both diseases. Inhibition of the exportin-1 (XPO1) mediated nuclear transport by clinical stage orally bioavailable small molecule inhibitors (SINE) prevented the nuclear export of the late intron-containing HIV RNA species and consequently potently suppressed viral replication. In contrast, in CRISPR-Cas9 genome edited cells expressing mutant C528S XPO1, viral replication was unaffected upon treatment, clearly demonstrating the anti-XPO1 mechanism of action. At the same time, SINE caused the nuclear accumulation of p53 tumor suppressor protein as well as inhibition of NF-κB activity in PEL cells resulting in cell cycle arrest and effective apoptosis induction. In vivo, oral administration arrested PEL tumor growth in engrafted mice. Our findings provide strong rationale for inhibiting XPO1 as an innovative strategy for the combined anti-retroviral and anti-neoplastic treatment of HIV and PEL and offer perspectives for the treatment of other AIDS-associated cancers and potentially other virus-related malignancies.
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MESH Headings
- Acrylates/chemistry
- Acrylates/pharmacology
- Acrylates/therapeutic use
- Active Transport, Cell Nucleus/drug effects
- Animals
- Apoptosis/drug effects
- Base Sequence
- CRISPR-Cas Systems/genetics
- Cell Cycle Checkpoints/drug effects
- Cell Line
- Cell Nucleus/drug effects
- Cell Nucleus/metabolism
- Female
- HIV/drug effects
- HIV/isolation & purification
- Humans
- Karyopherins/antagonists & inhibitors
- Karyopherins/metabolism
- Lymphoma, AIDS-Related/drug therapy
- Mice, Nude
- Molecular Sequence Data
- Molecular Targeted Therapy
- NF-kappa B/metabolism
- Protein Binding/drug effects
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Viral/metabolism
- Receptors, Cytoplasmic and Nuclear/antagonists & inhibitors
- Receptors, Cytoplasmic and Nuclear/metabolism
- Reproducibility of Results
- Triazoles/chemistry
- Triazoles/pharmacology
- Triazoles/therapeutic use
- Tumor Suppressor Protein p53/metabolism
- Virus Replication/drug effects
- Xenograft Model Antitumor Assays
- rev Gene Products, Human Immunodeficiency Virus/genetics
- rev Gene Products, Human Immunodeficiency Virus/metabolism
- Exportin 1 Protein
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Affiliation(s)
- Eline Boons
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Els Vanstreels
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Maarten Jacquemyn
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Tatiane C. Nogueira
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Jasper E. Neggers
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Thomas Vercruysse
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Joost van den Oord
- KU Leuven, Department of Imaging and Pathology, Translational Cell & Tissue Research, B-3000 Leuven, Belgium
| | | | | | | | - Robert Snoeck
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Christophe Pannecouque
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Graciela Andrei
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
| | - Dirk Daelemans
- KU Leuven, Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, B-3000 Leuven, Belgium
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50
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Abstract
MicroRNAs (miRNAs) are single stranded RNA molecules of ∼22 nucleotides that negatively regulate gene expression. MiRNAs are involved in fundamental cellular processes, such as development, differentiation, proliferation, and survival. MiRNA misregulation has been linked to various human diseases, most notably cancer. MicroRNA-21 (miR-21), a well-established oncomiR, is significantly overexpressed in many types of human cancers, thus rendering miR-21 a potential therapeutic target. Using a luciferase-based reporter assay under the control of miR-21 expression, a high-throughput screen of >300,000 compounds led to the discovery of a new aryl amide class of small-molecule miR-21 inhibitors. Structure-activity relationship (SAR) studies resulted in the development of four aryl amide derivatives as potent and selective miR-21 inhibitors. The intracellular levels of various miRNAs in HeLa cells were analyzed by qRT-PCR revealing specificity for miR-21 inhibition over other miRNAs. Additionally, preliminary mechanism of action studies propose a different mode of action compared to previously reported miR-21 inhibitors, thus affording a new chemical probe for future studies.
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Affiliation(s)
- Yuta Naro
- University of Pittsburgh, Department of Chemistry, 219 Parkman Ave, Pittsburgh, PA 15260, United States
| | - Meryl Thomas
- University of Pittsburgh, Department of Chemistry, 219 Parkman Ave, Pittsburgh, PA 15260, United States
| | - Matthew D Stephens
- North Carolina State University, Department of Chemistry, Campus Box 8204, Raleigh, NC 27695, United States
| | - Colleen M Connelly
- North Carolina State University, Department of Chemistry, Campus Box 8204, Raleigh, NC 27695, United States
| | - Alexander Deiters
- University of Pittsburgh, Department of Chemistry, 219 Parkman Ave, Pittsburgh, PA 15260, United States.
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