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Chen YG, Dombaxe C, D'Amato AR, Van Herck S, Welch H, Fu Q, Zhang S, Wang Y. Transformation of metallo-elastomer grafts in a carotid artery interposition model over a year. Biomaterials 2024; 309:122598. [PMID: 38696943 DOI: 10.1016/j.biomaterials.2024.122598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/04/2024]
Abstract
Current vascular grafts, primarily Gore-Tex® and Dacron®, don't integrate with the host and have low patency in small-diameter vessels (<6 mm). Biomaterials that possess appropriate viscoelasticity, compliance, and high biocompatibility are essential for their application in small blood vessels. We have developed metal ion crosslinked poly(propanediol-co-(hydroxyphenyl methylene)amino-propanediol sebacate) (M-PAS), a biodegradable elastomer with a wide range of mechanical properties. We call these materials metallo-elastomers. An initial test on Zn-, Fe-, and Cu-PAS grafts reveals that Cu-PAS is the most suitable because of its excellent elastic recoil and well-balanced polymer degradation/tissue regeneration rate. Here we report host remodeling of Cu-PAS vascular grafts in rats over one year. 76 % of the grafts remain patent and >90 % of the synthetic polymer is degraded by 12 months. Extensive cell infiltration leads to a positive host remodeling. The remodeled grafts feature a fully endothelialized lumen. Circumferentially organized smooth muscle cells, elastin fibers, and widespread mature collagen give the neoarteries mechanical properties similar to native arteries. Proteomic analysis further reveals the presence of important vascular proteins in the neoarteries. Evidence suggests that Cu-PAS is a promising material for engineering small blood vessels.
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Affiliation(s)
- Ying Grace Chen
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Catia Dombaxe
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14850, USA
| | | | - Simon Van Herck
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Halle Welch
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Qin Fu
- Proteomics and Metabolomics Facility, Institute of Biotechnology, Cornell University, Ithaca, NY, 14850, USA
| | - Sheng Zhang
- Proteomics and Metabolomics Facility, Institute of Biotechnology, Cornell University, Ithaca, NY, 14850, USA
| | - Yadong Wang
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14850, USA.
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Lai J, Kong W, Fu Q, Jiang Z, Sun B, Ye X, Kong J, Wei S, Jiang L. PSMD14 is a novel prognostic marker and therapeutic target in osteosarcoma. Diagn Pathol 2024; 19:79. [PMID: 38863002 PMCID: PMC11165824 DOI: 10.1186/s13000-024-01489-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 04/22/2024] [Indexed: 06/13/2024] Open
Abstract
BACKGROUND Osteosarcoma is a bone tumor that is characterized by high malignancy and a high mortality rate, and that originates from primitive osteoblastic mesenchymal cells and is most common in rapidly growing long bones. PSMD14, also known as RPN11 or POH1, is a member of the JAMM isopeptidase family, which is able to remove the substrate protein ubiquitination label, thereby regulating the stability and function of the substrate protein. In this study, we explored the expression and potential biological significance of the PSMD14 deubiquitinating enzyme in osteosarcoma. METHODS Immunohistochemical methods were used to detect the expression of PSMD14 in biopsies of 91 osteosarcoma patients, and the specimens were classified into high and low PSMD14 expression groups. The correlation between PSMD14 expression and clinical indicators and prognosis was compared.SiRNA was used to downregulate PSMD14 in two osteosarcoma cell lines (HOS and SJSA-1), and the effects of downregulation of PSMD14 on the viability, proliferation, and invasion ability of osteosarcoma cells were analyzed. RESULTS We identified significant differences in recurrence, metastasis, and survival time of the osteosarcoma patients on the basis of PSMD14 expression. High expression of PSMD14 in osteosarcoma patients was associated with a low survival rate and high risk of metastasis and recurrence. Down-regulation of PSMD14 inhibited the viability, proliferation, and invasiveness of osteosarcoma cell lines. CONCLUSIONS PSMD14 may be a new prognostic marker and therapeutic target for osteosarcoma.
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Affiliation(s)
- Jiabin Lai
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Pathology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Weike Kong
- Department of Pathology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Qiangchang Fu
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, China
| | - Zhaochang Jiang
- Department of Pathology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Bohao Sun
- Department of Pathology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Xin Ye
- Department of Pathology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Jing Kong
- Department of Endocrinology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Shumei Wei
- Department of Pathology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
| | - Lifeng Jiang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, China.
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China.
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, China.
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Wang A, Ma X, Wei F, Li Y, Liu Q, Zhang H. Evidence on the therapeutic role of thiolutin in imiquimod-induced psoriasis-like skin inflammation in mice. Immun Inflamm Dis 2023; 11:e877. [PMID: 37506136 PMCID: PMC10336655 DOI: 10.1002/iid3.877] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/08/2023] [Accepted: 05/11/2023] [Indexed: 07/30/2023] Open
Abstract
INTRODUCTION A recent study confirmed that thiolutin (THL), as a potent inflammasome inhibitor, plays a promising therapeutic role in multiple inflammatory disease models. However, the effect of THL on psoriasis has not been reported so far. METHODS A psoriasiform dermatitis model was prepared by applying 5% imiquimod (IMQ) cream on mice. A total of 36 mice were randomly divided into six groups: control, model, model + THL-L/M/H (THL, 1/2.5/5 mg/kg/day), model + methotrexate (1 mg/kg/day). Psoriasis area and severity index (PASI) scores were observed and calculated. The histological changes in skin, liver, and kidney tissues were observed by hematoxylin and eosin staining. Alanine aminotransferase, aspartate aminotransferase, blood urea nitrogen, and blood creatinine were measured by automatic biochemistry analyzer. The size of the spleens was determined, and the proportion of Foxp3 + CD4+ regulatory T (Treg) cells in the spleens was tested by flow cytometry. The proinflammatory factors and nucleotide oligomerization domain nucleotide oligomerization domain (NOD)-like receptor protein 3 (NLRP3) inflammasome protein levels were examined by reverse transcription-quantitative polymerase chain reaction, enzyme-linked immunosorbent assay, Western blotting, and immunohistochemistry, respectively. RESULTS THL administration preeminently reduced the thickness, scaling, and erythema of the skin lesions, alleviated IMQ-induced psoriasiform lesions in mice, reduced the PASI score, and ameliorated histopathological changes in mouse skin. The spleen index was decreased by almost half and the proportion of Foxp3 + CD4+ Treg cells was increased after intervention by THL. THL intervention did not affect liver and kidney function, but decreased the expression levels of proinflammatory factors and NLRP3 inflammasome in the skin of psoriatic mice. CONCLUSIONS THL may alleviate IMQ-induced psoriasis-like manifestations in mice by inhibiting NLRP3 inflammasome.
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Affiliation(s)
- Aixue Wang
- Department of Dermatology, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Xixing Ma
- Department of Dermatology, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Feng Wei
- Department of Dermatology, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yanling Li
- Department of Dermatology, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Qiang Liu
- Department of Dermatology, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Huanhuan Zhang
- Department of Dermatology, The Second Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
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Liu W, Huang X, Luo W, Liu X, Chen W. The Role of Paxillin Aberrant Expression in Cancer and Its Potential as a Target for Cancer Therapy. Int J Mol Sci 2023; 24:ijms24098245. [PMID: 37175948 PMCID: PMC10179295 DOI: 10.3390/ijms24098245] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/21/2023] [Accepted: 05/02/2023] [Indexed: 05/15/2023] Open
Abstract
Paxillin is a multi-domain adaptor protein. As an important member of focal adhesion (FA) and a participant in regulating cell movement, paxillin plays an important role in physiological processes such as nervous system development, embryonic development, and vascular development. However, increasing evidence suggests that paxillin is aberrantly expressed in many cancers. Many scholars have also recognized that the abnormal expression of paxillin is related to the prognosis, metastases, invasion, survival, angiogenesis, and other aspects of malignant tumors, suggesting that paxillin may be a potential cancer therapeutic target. Therefore, the study of how aberrant paxillin expression affects the process of tumorigenesis and metastasis will help to develop more efficacious antitumor drugs. Herein, we review the structure of paxillin and its function and expression in tumors, paying special attention to the multifaceted effects of paxillin on tumors, the mechanism of tumorigenesis and progression, and its potential role in tumor therapy. We also hope to provide a reference for the clinical prognosis and development of new tumor therapeutic targets.
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Affiliation(s)
- Weixian Liu
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Institute of Aging Research, Guangdong Medical University, Dongguan 523808, China
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China
| | - Xinxian Huang
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Institute of Aging Research, Guangdong Medical University, Dongguan 523808, China
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China
| | - Weizhao Luo
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Institute of Aging Research, Guangdong Medical University, Dongguan 523808, China
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China
| | - Xinguang Liu
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Institute of Aging Research, Guangdong Medical University, Dongguan 523808, China
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China
| | - Weichun Chen
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Institute of Aging Research, Guangdong Medical University, Dongguan 523808, China
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China
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Thiolutin attenuates ischemic stroke injury via inhibition of NLRP3 inflammasome: an in vitro and in vivo study. Exp Brain Res 2023; 241:839-849. [PMID: 36749359 DOI: 10.1007/s00221-023-06566-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/31/2023] [Indexed: 02/08/2023]
Abstract
A recent study confirmed that thiolutin is effective in the treatment of nucleotide-binding domain-like receptor protein 3 (NLRP3)-related inflammatory diseases. Nevertheless, whether thiolutin (THL) is involved in the regulation of NLRP3 inflammasome in ischemic stroke is not known. The murine neuronal cell oxygen-glucose deprivation (OGD) model was first established, and then different concentrations (25 nM and 50 nM) of THL were administered for 48 h incubation, respectively. Subsequently, cell viability and toxicity, and the levels of intracellular inflammatory factors interleukin-1β (IL-1β), interleukin-18 (IL-18), oxidative stress factors superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT) and malondialdehyde (MDA), and NLRP3 inflammasome activation-related proteins pro-caspase, caspase-1, apoptosis-associated speck like-protein (ASC) and NLRP3 were examined, respectively. We further established the mouse middle cerebral artery occlusion (MCAO) model to evaluate the therapeutic effects of THL on cerebral infarction like behaviors in mice and the preventive effects on NLRP3 inflammasome activation in vivo. Cell cytotoxic, and the levels of inflammatory factors and oxidative stress were conspicuously increased, and NLRP3 inflammasome was materially activated in the OGD-induced cell model and MCAO-established mouse model, which were partially countered by THL treatment. Besides, intraperitoneal injection of THL could prominently reduce the cerebral infarct volume and neuromotor deficit scores in MCAO mice. The present study confirmed that THL attenuated neuronal and cerebral inflammatory injury caused by OGD and MCAO models in mice through restraining NLRP3 inflammasome activation in vitro and in vivo.
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Bhaskaran ST, Mathew P. Microwave assisted synthesis of functionalized 2H-chromene-2-thiones and 1,2-dithiole-3-thiones from β-oxodithioesters: Characterization, in vitro cytotoxicity and in silico docking studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Ren GM, Li J, Zhang XC, Wang Y, Xiao Y, Zhang XY, Liu X, Zhang W, Ma WB, Zhang J, Li YT, Tao SS, Wang T, Liu K, Chen H, Zhan YQ, Yu M, Li CY, Ge CH, Tian BX, Dou GF, Yang XM, Yin RH. Pharmacological targeting of NLRP3 deubiquitination for treatment of NLRP3-associated inflammatory diseases. Sci Immunol 2021; 6:6/58/eabe2933. [PMID: 33931568 DOI: 10.1126/sciimmunol.abe2933] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 02/03/2021] [Accepted: 03/23/2021] [Indexed: 12/13/2022]
Abstract
Pharmacologically inhibiting nucleotide-binding domain and leucine-rich repeat-containing (NLR) family, pyrin domain-containing protein 3 (NLRP3) inflammasome activation results in potent therapeutic effects in a wide variety of preclinical inflammatory disease models. NLRP3 deubiquitination is essential for efficient NLRP3 inflammasome activity, but it remains unclear whether this process can be harnessed for therapeutic benefit. Here, we show that thiolutin (THL), an inhibitor of the JAB1/MPN/Mov34 (JAMM) domain-containing metalloprotease, blocks NLRP3 inflammasome activation by canonical, noncanonical, alternative, and transcription-independent pathways at nanomolar concentrations. In addition, THL potently inhibited the activation of multiple NLRP3 mutants linked with cryopyrin-associated periodic syndromes (CAPS). Treatment with THL alleviated NLRP3-related diseases in mouse models of lipopolysaccharide-induced sepsis, monosodium urate-induced peritonitis, experimental autoimmune encephalomyelitis, CAPS, and methionine-choline-deficient diet-induced nonalcoholic fatty liver disease. Mechanistic studies revealed that THL inhibits the BRCC3-containing isopeptidase complex (BRISC)-mediated NLRP3 deubiquitination and activation. In addition, we show that holomycin, a natural methyl derivative of THL, displays an even higher inhibitory activity against NLRP3 inflammasome than THL. Our study validates that posttranslational modification of NLRP3 can be pharmacologically targeted to prevent or treat NLRP3-associated inflammatory diseases. Future clinical development of derivatives of THL may provide new therapies for NLRP3-related diseases.
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Affiliation(s)
- Guang-Ming Ren
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Jian Li
- Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Xiao-Chun Zhang
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Yu Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China.,School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, Anhui, China
| | - Yang Xiao
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Xuan-Yi Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Xian Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Wen Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China.,Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Wen-Bing Ma
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Jie Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China.,Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Ya-Ting Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China.,Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Shou-Song Tao
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China.,Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Ting Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China.,School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, Anhui, China
| | - Kai Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Hui Chen
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Yi-Qun Zhan
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Miao Yu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Chang-Yan Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China
| | - Chang-Hui Ge
- Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Bo-Xue Tian
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Gui-Fang Dou
- Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Xiao-Ming Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China. .,School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, Anhui, China
| | - Rong-Hua Yin
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, China.
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Jing C, Li X, Zhou M, Zhang S, Lai Q, Liu D, Ye B, Li L, Wu Y, Li H, Yue K, Chen P, Yao X, Wu Y, Duan Y, Wang X. The PSMD14 inhibitor Thiolutin as a novel therapeutic approach for esophageal squamous cell carcinoma through facilitating SNAIL degradation. Theranostics 2021; 11:5847-5862. [PMID: 33897885 PMCID: PMC8058732 DOI: 10.7150/thno.46109] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 03/11/2021] [Indexed: 12/13/2022] Open
Abstract
Metastasis and chemoresistance are major causes of poor prognosis in patients with esophageal squamous cell carcinoma (ESCC), manipulated by multiple factors including deubiquitinating enzyme (DUB). DUB PSMD14 is reported to be a promising therapeutic target in various cancers. Here, we explored the antitumor activity of Thiolutin (THL), the PSMD14 inhibitor, as a new therapy strategy in ESCC. Methods: Through 4-NQO-induced murine ESCC model, we investigated the expression of PSMD14 in esophageal tumorigenesis. Ubiquitin-AMC assay was performed to evaluate DUB activity of PSMD14 with THL treatment. The effect of THL on epithelial-to-mesenchymal transition (EMT), invasion, stemness and chemosensitivity was detected by using in vitro and in vivo experiments. Immunoprecipitation and in vivo ubiquitination assay were conducted to examine whether THL could impair the deubiquitination and stability of SNAIL regulated by PSMD14. Results: Compared with normal esophageal epithelium, PSMD14 was upregulated in 4-NQO-induced murine esophageal epithelium dysplasia and ESCC tissues. THL could significantly weaken DUB activity of PSMD14. Furthermore, the results of in vitro and in vivo assays showed that THL efficiently suppressed motility and stemness and increased sensitivity to cisplatin in ESCC. Mechanically, THL impaired the interaction between PSMD14 and SNAIL, then promoted the ubiquitination and degradation of SNAIL to inhibit EMT which plays a crucial role in ESCC metastasis, stemness and chemosensitivity. TCGA database analysis revealed that high concomitant PSMD14/SNAIL expression predicted shorter overall survival in esophageal cancer. Conclusion: Our findings demonstrate for the first time that suppression of PSMD14/SNAIL axis by THL could be a novel and promising therapeutic approach for ESCC clinical therapy.
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Jing C, Duan Y, Zhou M, Yue K, Zhuo S, Li X, Liu D, Ye B, Lai Q, Li L, Yao X, Wei H, Zhang W, Wu Y, Wang X. Blockade of deubiquitinating enzyme PSMD14 overcomes chemoresistance in head and neck squamous cell carcinoma by antagonizing E2F1/Akt/SOX2-mediated stemness. Theranostics 2021; 11:2655-2669. [PMID: 33456565 PMCID: PMC7806466 DOI: 10.7150/thno.48375] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 12/03/2020] [Indexed: 12/25/2022] Open
Abstract
Increasing evidence reveals a close relationship between deubiquitinating enzymes (DUBs) and cancer progression. In this study, we attempted to identify the roles and mechanisms of critical DUBs in head and neck squamous cell carcinoma (HNSCC). Methods: Bioinformatics analysis was performed to screen differentially expressed novel DUBs in HNSCC. Immunohistochemistry assay was used to measure the expression of DUB PSMD14 in HNSCC specimens and adjacent normal tissues. The level of PSMD14 in HNSCC tumorigenesis was investigated using a 4-NQO-induced murine HNSCC model. The function of PSMD14 was determined through loss-of-function assays. Chromatin immunoprecipitation, immunoprecipitation and in vivo ubiquitination assay were conducted to explore the potential mechanism of PSMD14. The anti-tumor activity of PSMD14 inhibitor Thiolutin was assessed by in vitro and in vivo experiments. Results: We identified PSMD14 as one of significantly upregulated DUBs in HNSCC tissues. Aberrant expression of PSMD14 was associated with tumorigenesis and malignant progression of HNSCC and further indicated poor prognosis. The results of in vitro and in vivo experiments demonstrated PSMD14 depletion significantly undermined HNSCC growth, chemoresistance and stemness. Mechanically, PSMD14 inhibited the ubiquitination and degradation of E2F1 to improve the activation of Akt pathway and the transcription of SOX2. Furthermore, PSMD14 inhibitor Thiolutin exhibited a potent anti-tumor effect on HNSCC in vivo and in vitro by impairing DUB activity of PSMD14. Conclusion: Our findings demonstrate the role and mechanism of PSMD14 in HNSCC, and provide a novel and promising target for diagnosis and clinical therapy of HNSCC.
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Yang WJ, Yan JB, Zhang L, Zhao F, Mei ZM, Yang YN, Xiang Y, Xing YQ. Paxillin promotes the migration and angiogenesis of HUVECs and affects angiogenesis in the mouse cornea. Exp Ther Med 2020; 20:901-909. [PMID: 32742332 PMCID: PMC7388276 DOI: 10.3892/etm.2020.8751] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 08/07/2019] [Indexed: 12/20/2022] Open
Abstract
Neonatal vascular ophthalmopathy is a refractory ophthalmologic disease, and is a major cause of blindness. Occurrence of neonatal vascular ophthalmopathy may be associated with Paxillin, a cellular adhesion molecule which promotes the migration of endothelial cells and angiogenesis. To explore the role of PXN in corneal angiogenesis, human umbilical vein endothelial cells were divided into five groups: i) Control group; ii) Empty vector-transfected control group; iii) PXN knockdown group (shPXN group); iv) PXN-negative control (NC) group; and v) PXN over-expressed group (overExp group). PXN protein levels, migration and tube formation were assessed in the different experimental groups. Mice were divided into four groups: i) Control; ii) Model; iii) shPXN; and iv) overExp groups. Tube formation was significantly increased in the overExp group compared with the empty vector-transfected control group (P<0.01). Tube formation was significantly decreased in the shPXN group compared with the PXN-NC group (P<0.01). In mice, blood corpuscles were significantly decreased in the shPXN group. PXN promoted the migration of endothelial cells and corneal angiogenesis. The results of the present study suggest a role for PXN in corneal angiogenesis and provide a theoretical basis and potential target for the treatment of corneal angiogenesis.
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Affiliation(s)
- Wan-Ju Yang
- Eye Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China.,Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Jiang-Bo Yan
- Eye Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Li Zhang
- Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Fang Zhao
- Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Zhong-Ming Mei
- Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Yan-Ning Yang
- Eye Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Yi Xiang
- Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Yi-Qiao Xing
- Eye Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
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Kabir MZ, Benbekhti Z, Ridzwan NFW, Merrouche R, Bouras N, Mohamad SB, Tayyab S. Biophysical and in silico investigations of the molecular association between a potent RNA polymerase inhibitor, thiolutin and human serum albumin. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112648] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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12
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Repurposing old drugs as new inhibitors of the ubiquitin-proteasome pathway for cancer treatment. Semin Cancer Biol 2019; 68:105-122. [PMID: 31883910 DOI: 10.1016/j.semcancer.2019.12.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 10/30/2019] [Accepted: 12/15/2019] [Indexed: 12/25/2022]
Abstract
The ubiquitin-proteasome system (UPS) plays a central role in the degradation of cellular proteins. Targeting protein degradation has been validated as an effective strategy for cancer therapy since 2003. Several components of the UPS have been validated as potential anticancer targets, including 20S proteasomes, 19S proteasome-associated deubiquitinases (DUBs) and ubiquitin ligases (E3s). 20S proteasome inhibitors (such as bortezomib/BTZ and carfilzomib/CFZ) have been approved by the U.S. Food and Drug Administration (FDA) for the treatment of multiple myeloma (MM) and some other liquid tumors. Although survival of MM patients has been improved by the introduction of BTZ-based therapies, these clinical 20S proteasome inhibitors have several limitations, including emergence of resistance in MM patients, neuro-toxicities, and little efficacy in solid tumors. One of strategies to improve the current status of cancer treatment is to repurpose old drugs with UPS-inhibitory properties as new anticancer agents. Old drug reposition represents an attractive drug discovery approach compared to the traditional de novo drug discovery process which is time-consuming and costly. In this review, we summarize status of repurposed inhibitors of various UPS components, including 20S proteasomes, 19S-associated DUBs, and ubiquitin ligase E3s. The original and new mechanisms of action, molecular targets, and potential anticancer activities of these repurposed UPS inhibitors are reviewed, and their new uses including combinational therapies for cancer treatment are discussed.
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13
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Merrouche R, Yekkour A, Coppel Y, Bouras N, Zitouni A, Lebrihi A, Mathieu F, Sabaou N. A new dithiolopyrrolone antibiotic triggered by a long fermentation of Saccharothrix algeriensis NRRL B-24137 in sorbic acid-amended medium. Lett Appl Microbiol 2019; 69:294-301. [PMID: 31424588 DOI: 10.1111/lam.13207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/09/2019] [Accepted: 08/09/2019] [Indexed: 11/28/2022]
Abstract
Saccharothrix algeriensis NRRL B-24137 is an actinobacterium isolated from Algerian Saharan soil. It produces bioactive compounds belonging to the dithiolopyrrolone class of antibiotics, which are characterized by the possession of a unique pyrrolinonodithiole nucleus. Dithiolopyrrolones are known for their strong antibacterial and antifungal activities. This class of antibiotics generated great interest after the discovery of their anticancer properties. In this study, an antibiotic named PR11, produced after a long bacterial fermentation (11 days) in sorbic acid-containing culture broth, was characterized as a new dithiolopyrrolone derivative. After HPLC analysis and purification, the chemical structure of this antibiotic was determined by 1 H- and 13 C-nuclear magnetic resonance, mass and UV-visible data. PR11 was thus characterized as an iso-hexanoyl-pyrrothine, a novel dithiolopyrrolone derivative. The minimum inhibitory concentrations of the new induced antibiotic were determined against several pathogenic micro-organisms. A moderate to strong activity was noted against all Gram-positive bacteria, filamentous fungi and yeasts tested. SIGNIFICANCE AND IMPACT OF THE STUDY: Given the strong activities of dithiolopyrrolones against diverse prokaryotic and eukaryotic micro-organisms including potent selective-anticancer activity, the discovery of new-related derivatives draw continuous attention for therapeutic research. Depending on nature and concentration of added precursor, Saccharothrix algeriensis NRRL B-24137 produce several dithiolopyrrolone coumpounds. In this study, sorbic acid addition combined to long fermentation duration was shown to induce the biosynthesis of a novel dithiolopyrrolone derivative. After purification and full spectroscopic and spectrometric study, the compound was characterized as iso-hexanoyl-pyrrothine. In the future investigation for novel dithiolopyrrolone discovery, fermentation duration should be regarded as a key parameter as well.
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Affiliation(s)
- R Merrouche
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - A Yekkour
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.,Institut National de Recherche Agronomique d'Algérie, Alger, Algeria
| | - Y Coppel
- Laboratoire de Chimie de Coordination, CNRS, Université de Toulouse, UPS, INPT, Toulouse, France
| | - N Bouras
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.,Département de Biologie, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaïa, Ghardaïa, Algeria
| | - A Zitouni
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - A Lebrihi
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France
| | - F Mathieu
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France
| | - N Sabaou
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
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14
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Treue D, Bockmayr M, Stenzinger A, Heim D, Hester S, Klauschen F. Proteogenomic systems analysis identifies targeted therapy resistance mechanisms in EGFR‐mutated lung cancer. Int J Cancer 2018; 144:545-557. [DOI: 10.1002/ijc.31845] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 07/02/2018] [Accepted: 07/23/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Denise Treue
- Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt‐Universität zu Berlin, and Berlin Institute of Health, Institute of Pathology Berlin Germany
| | - Michael Bockmayr
- Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt‐Universität zu Berlin, and Berlin Institute of Health, Institute of Pathology Berlin Germany
- Department of Pediatric Hematology and OncologyUniversity Medical Center Hamburg‐Eppendorf Hamburg Germany
| | - Albrecht Stenzinger
- University of Heidelberg, Institute of Pathology Heidelberg Germany
- German Cancer Consortium (DKTK) Germany
- German Cancer Research Center (DKFZ) Heidelberg Germany
| | - Daniel Heim
- Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt‐Universität zu Berlin, and Berlin Institute of Health, Institute of Pathology Berlin Germany
| | - Svenja Hester
- Department of BiochemistryUniversity of Oxford Oxford United Kingdom
| | - Frederick Klauschen
- Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt‐Universität zu Berlin, and Berlin Institute of Health, Institute of Pathology Berlin Germany
- German Cancer Consortium (DKTK) Germany
- German Cancer Research Center (DKFZ) Heidelberg Germany
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15
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Abstract
This paper reviews naturally occurring cell adhesion inhibitors derived from a plant, microbial and marine origin. Plant-derived inhibitors are classified according to a type of structure. Microbially and marine-derived inhibitors were described according to age. In addition, effects of inhibitors on cell proliferation and that of standards on cell adhesion are listed as much as possible.
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Affiliation(s)
- Satoshi Takamatsu
- Division of Natural Medicine and Therapeutics, Department of Clinical Pharmacy, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan.
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16
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Vijaya Sundar J, Kamaraj M, Subramanian V. Probing the effect of different graphitic nitrogen sites on the aerobic oxidation of thiols to disulfides: a DFT study. Phys Chem Chem Phys 2018; 20:2057-2065. [PMID: 29300059 DOI: 10.1039/c7cp05924h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalized graphene materials are well known for their application in catalyzing the aerobic oxidation of alcohols, hydrocarbons, etc. in an aqueous medium. Despite the fact that a few catalysts are known to oxidize thiols to disulfides, their selectivity is poor and requires oxidants that are not suitable in terms of the principles of green chemistry. Therefore, in this context, an attempt has been made to investigate the possibility of utilizing nitrogen doped graphene for the aerobic oxidation of thiols to disulfides using density functional theory (DFT). Our previous study (V. S. Jeyaraj, M. Kamaraj and V. Subramanian, J. Phys. Chem. C, 2015, 119, 26438-26450) has shed light on the activation of dioxygen to form activated oxygen species (AOS) at different graphitic nitrogen sites. Hence the same has been used to study the two-electron oxidation of thiophenol and methanethiol. The AOS are of three kinds: (1) peroxide type at the edges, (2) superoxide type at the center and (3) ketonic type at edges. The findings from this study indicate that the peroxide type AOS leads to selective formation of diphenyl disulfide, whereas the superoxide type at the center facilitates the formation of hydrogen peroxide which could lead to over-oxidation of disulfide. The oxidation of aromatic thiols (thiophenol) by the ketonic type of AOS is nearly a barrier-less reaction (0.67 kcal mol-1). Similarly, AOS at the edges with the peroxide form can oxidize aliphatic thiols (methanethiol) with a less barrier of 1.55 kcal mol-1, which can be a spontaneous reaction. The mechanism of oxidation is completely different from the oxidative pathway of alcohols by the same AOS. The formation of S-OH species is strictly avoided by the strong stabilization of thiyl radicals over the π-surface of graphene.
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Affiliation(s)
- J Vijaya Sundar
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India.
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17
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Duran CL, Howell DW, Dave JM, Smith RL, Torrie ME, Essner JJ, Bayless KJ. Molecular Regulation of Sprouting Angiogenesis. Compr Physiol 2017; 8:153-235. [PMID: 29357127 DOI: 10.1002/cphy.c160048] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The term angiogenesis arose in the 18th century. Several studies over the next 100 years laid the groundwork for initial studies performed by the Folkman laboratory, which were at first met with some opposition. Once overcome, the angiogenesis field has flourished due to studies on tumor angiogenesis and various developmental models that can be genetically manipulated, including mice and zebrafish. In addition, new discoveries have been aided by the ability to isolate primary endothelial cells, which has allowed dissection of various steps within angiogenesis. This review will summarize the molecular events that control angiogenesis downstream of biochemical factors such as growth factors, cytokines, chemokines, hypoxia-inducible factors (HIFs), and lipids. These and other stimuli have been linked to regulation of junctional molecules and cell surface receptors. In addition, the contribution of cytoskeletal elements and regulatory proteins has revealed an intricate role for mobilization of actin, microtubules, and intermediate filaments in response to cues that activate the endothelium. Activating stimuli also affect various focal adhesion proteins, scaffold proteins, intracellular kinases, and second messengers. Finally, metalloproteinases, which facilitate matrix degradation and the formation of new blood vessels, are discussed, along with our knowledge of crosstalk between the various subclasses of these molecules throughout the text. Compr Physiol 8:153-235, 2018.
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Affiliation(s)
- Camille L Duran
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - David W Howell
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Jui M Dave
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Rebecca L Smith
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Melanie E Torrie
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, USA
| | - Jeffrey J Essner
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, USA
| | - Kayla J Bayless
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
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18
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Lauinger L, Li J, Shostak A, Cemel IA, Ha N, Zhang Y, Merkl PE, Obermeyer S, Stankovic-Valentin N, Schafmeier T, Wever WJ, Bowers AA, Carter KP, Palmer AE, Tschochner H, Melchior F, Deshaies RJ, Brunner M, Diernfellner A. Thiolutin is a zinc chelator that inhibits the Rpn11 and other JAMM metalloproteases. Nat Chem Biol 2017; 13:709-714. [PMID: 28459440 DOI: 10.1038/nchembio.2370] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/22/2017] [Indexed: 12/21/2022]
Abstract
Thiolutin is a disulfide-containing antibiotic and anti-angiogenic compound produced by Streptomyces. Its biological targets are not known. We show that reduced thiolutin is a zinc chelator that inhibits the JAB1/MPN/Mov34 (JAMM) domain-containing metalloprotease Rpn11, a deubiquitinating enzyme of the 19S proteasome. Thiolutin also inhibits the JAMM metalloproteases Csn5, the deneddylase of the COP9 signalosome; AMSH, which regulates ubiquitin-dependent sorting of cell-surface receptors; and BRCC36, a K63-specific deubiquitinase of the BRCC36-containing isopeptidase complex and the BRCA1-BRCA2-containing complex. We provide evidence that other dithiolopyrrolones also function as inhibitors of JAMM metalloproteases.
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Affiliation(s)
- Linda Lauinger
- Heidelberg University Biochemistry Center, Heidelberg, Germany
| | - Jing Li
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA
| | - Anton Shostak
- Heidelberg University Biochemistry Center, Heidelberg, Germany
| | | | - Nati Ha
- Heidelberg University Biochemistry Center, Heidelberg, Germany
| | - Yaru Zhang
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA
| | - Philipp E Merkl
- Lehrstuhl Biochemie III, Biochemie Zentrum Regensburg, Universität Regensburg, Regensburg, Germany
| | - Simon Obermeyer
- Lehrstuhl Biochemie III, Biochemie Zentrum Regensburg, Universität Regensburg, Regensburg, Germany
| | - Nicolas Stankovic-Valentin
- Zentrum Molekulare Biologie der Universität Heidelberg, DKFZ-ZMBH Alliance, Heidelberg University, Heidelberg, Germany
| | | | - Walter J Wever
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Albert A Bowers
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Kyle P Carter
- Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado, USA
| | - Amy E Palmer
- Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado, USA
| | - Herbert Tschochner
- Lehrstuhl Biochemie III, Biochemie Zentrum Regensburg, Universität Regensburg, Regensburg, Germany
| | - Frauke Melchior
- Zentrum Molekulare Biologie der Universität Heidelberg, DKFZ-ZMBH Alliance, Heidelberg University, Heidelberg, Germany
| | - Raymond J Deshaies
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA.,Howard Hughes Medical Institute, California Institute of Technology, Pasadena, California, USA
| | - Michael Brunner
- Heidelberg University Biochemistry Center, Heidelberg, Germany
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19
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Two Chitotriose-Specific Lectins Show Anti-Angiogenesis, Induces Caspase-9-Mediated Apoptosis and Early Arrest of Pancreatic Tumor Cell Cycle. PLoS One 2016; 11:e0146110. [PMID: 26795117 PMCID: PMC4721955 DOI: 10.1371/journal.pone.0146110] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 12/14/2015] [Indexed: 11/19/2022] Open
Abstract
The antiproliferative activity of two chito-specific agglutinins purified from Benincasa hispida (BhL) and Datura innoxia (DiL9) of different plant family origin was investigated on various cancer cell lines. Both lectins showed chitotriose specificity, by inhibiting lectin hemagglutinating activity. On further studies, it was revealed that these agglutinins caused remarkable concentration-dependent antiproliferative effect on human pancreatic cancerous cells but not on the normal human umbilical vein endothelial cells even at higher doses determined using MTT assay. The GI50 values were approximately 8.4 μg ml(-1) (0.247 μM) and 142 μg ml(-1) (14.8 μM) for BhL and DiL9, respectively, against PANC-1 cells. The growth inhibitory effect of these lectins on pancreatic cancer cells were shown to be a consequence of lectin cell surface binding and triggering G0/G1 arrest, mitochondrial membrane depolarization, sustained increase of the intracellular calcium release and the apoptotic signal is amplified by activation of caspases executing cell death. Interestingly, these lectins also showed anti-angiogenic activity by disrupting the endothelial tubulogenesis. Therefore, we report for the first time two chito-specific lectins specifically binding to tumor glycans; they can be considered to be a class of molecules with antitumor activity against pancreatic cancer cells mediated through caspase dependent mitochondrial apoptotic pathway.
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20
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Fu P, MacMillan JB. Thiasporines A-C, thiazine and thiazole derivatives from a marine-derived Actinomycetospora chlora. JOURNAL OF NATURAL PRODUCTS 2015; 78:548-51. [PMID: 25584783 PMCID: PMC4380196 DOI: 10.1021/np500929z] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Indexed: 05/19/2023]
Abstract
Thiasporine A (1), the first natural product with a 5-hydroxy-4H-1,3-thiazin-4-one moiety, along with two new thiazole derivatives, thiasporines B and C (2 and 3), were isolated from the marine-derived Actinomycetospora chlora SNC-032. The structures of 1-3 were established on the basis of comprehensive spectroscopic analysis and chemical methods. Thiasporine A showed cytotoxicity against the non-small-cell lung cancer cell line H2122 with an IC50 value of 5.4 μM.
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21
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Zhang P, Feng S, Bai H, Zeng P, Chen F, Wu C, Peng Y, Zhang Q, Zhang Q, Ye Q, Xue Q, Xu X, Song E, Song Y. Polychlorinated biphenyl quinone induces endothelial barrier dysregulation by setting the cross talk between VE-cadherin, focal adhesion, and MAPK signaling. Am J Physiol Heart Circ Physiol 2015; 308:H1205-14. [PMID: 25770237 DOI: 10.1152/ajpheart.00005.2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 03/09/2015] [Indexed: 12/12/2022]
Abstract
Environmental hazardous material polychlorinated biphenyl (PCB) exposure is associated with vascular endothelial dysfunction, which may increase the risk of cardiovascular diseases and cancer metastasis. Our previous studies illustrated the cytotoxic, antiproliferative, and genotoxic effects of a synthetic, quinone-type, highly reactive metabolite of PCB, 2,3,5-trichloro-6-phenyl-[1,4]benzoquinone (PCB29-pQ). Here, we used it as the model compound to investigate its effects on vascular endothelial integrity and permeability. We demonstrated that noncytotoxic doses of PCB29-pQ induced vascular endothelial (VE)-cadherin junction disassembly by increasing the phosphorylation of VE-cadherin at Y658. We also found that focal adhesion assembly was required for PCB29-pQ-induced junction breakdown. Focal adhesion site-associated actin stress fibers may serve as holding points for cytoskeletal tension to regulate the cellular contractility. PCB29-pQ exposure promoted the association of actin stress fibers with paxillin-containing focal adhesion sites and enlarged the size/number of focal adhesions. In addition, PCB29-pQ treatment induced phosphorylation of paxillin at Y118. By using pharmacological inhibition, we further demonstrated that p38 activation was necessary for paxillin phosphorylation, whereas extracellular signal-regulated kinases-1/2 activation regulated VE-cadherin phosphorylation. In conclusion, these results indicated that PCB29-pQ stimulates endothelial hyperpermeability by mediating VE-cadherin disassembly, junction breakdown, and focal adhesion formation. Intervention strategies targeting focal adhesion and MAPK signaling could be used as therapeutic approaches for preventing adverse cardiovascular health effects induced by environmental toxicants such as PCBs.
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Affiliation(s)
- Pu Zhang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and Department of Bioengineering, Pennsylvania State University, University Park, Pennsylvania
| | - Shan Feng
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Huiyuan Bai
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Panying Zeng
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Feng Chen
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Chengxiang Wu
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Yi Peng
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Qin Zhang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Qiuyao Zhang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Qichao Ye
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Qiang Xue
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Xiaoyu Xu
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Erqun Song
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
| | - Yang Song
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, China; and
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22
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Wang L, Zhang X, Zhou Q, Huang X. Effects of terbium (III) on signaling molecules in horseradish. Biol Trace Elem Res 2015; 164:122-9. [PMID: 25534291 DOI: 10.1007/s12011-014-0209-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 12/10/2014] [Indexed: 10/24/2022]
Abstract
Rare earth elements, especially terbium (Tb), are high-valence heavy metal elements that accumulate in the environment, and they show toxic effects on plants. Signaling molecules regulate many physiological and biochemical processes in plants. How rare earth elements affect signaling molecules remains largely unknown. In the present study, the effects of Tb(3+) on some extracellular and intracellular signaling molecules (gibberellic acid, abscisic acid, auxin, H2O2, and Ca(2+)) in horseradish leaves were investigated by using high-performance liquid chromatography, X-ray energy spectrometry, and transmission electron microscopy, and Tb(3+) was sprayed on the surface of leaves. Tb(3+) treatment decreased the auxin and gibberellic acid contents and increased the abscisic acid content. These changes in the contents of phytohormones (gibberellic acid, abscisic acid, and auxin) triggered excessive production of intracellular H2O2. Consequently, the increase in H2O2 content stimulated the influx of extracellular Ca(2+) and the release of Ca(2+) from Ca(2+) stores, leading to Ca(2+) overload and the resulting inhibition of physiological and biochemical processes. The effects outlined above were more evident with increasing the concentration of Tb(3+) sprayed on horseradish leaves. Our data provide a possible underlying mechanism of Tb(3+) action on plants.
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Affiliation(s)
- Lihong Wang
- State Key Laboratory of Food Science and Technology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China
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23
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Li B, Wever WJ, Walsh CT, Bowers AA. Dithiolopyrrolones: biosynthesis, synthesis, and activity of a unique class of disulfide-containing antibiotics. Nat Prod Rep 2014; 31:905-23. [PMID: 24835149 PMCID: PMC4132845 DOI: 10.1039/c3np70106a] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Covering: up to 2014. Dithiolopyrrolone (DTP) group antibiotics were first isolated in the early half of the 20th century, but only recently has research been reawakened by insights gained from the synthesis and biosynthesis of this structurally intriguing class of molecules. DTPs are characterized by an electronically unique bicyclic structure, which contains a compact disulfide bridge between two ene-thiols. Points of diversity within the compound class occur outside of the bicyclic core, at the two amide nitrogens. Such modifications distinguish three of the most well studied members of the class, holomycin, thiolutin, and aureothricin; the DTP core has also more recently been identified in the marine antibiotic thiomarinol, in which it is linked to a marinolic acid moiety, analog of the FDA-approved topical antibiotic Bactroban® (GlaxoSmithKline). Dithiolopyrrolones exhibit relatively broad-spectrum antibiotic activity against many Gram-positive and Gram-negative bacteria, as well as strains of Mycobacterium tuberculosis. Additionally, they have been shown to exhibit potent and selective anti-cancer activity. Despite this promising profile, there is still much unknown about the mechanisms of action for DTPs. Early reports suggested that they inhibit yeast growth at the level of transcription and that this effect is largely responsible for their distinctive microbial static properties; a similar mechanism is supported in bacteria. Elucidation of biosynthetic pathways for holomycin in Streptomyces clavuligerus and Yersinia ruckeri and thiomarinol in Alteromonas rava sp. nov. SANK 73390, have contributed evidence suggesting that multiple mechanisms may be operative in the activity of these compounds. This review will comprehensively cover the history and development of dithiolopyrrolones with particular emphasis on the biosynthesis, synthesis, biological activity and mechanism of action.
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Affiliation(s)
- Bo Li
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599
| | - Walter J. Wever
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Christopher T. Walsh
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 200 Longwood Ave., Boston, MA, 02115
| | - Albert A. Bowers
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
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24
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Abreu PA, Sousa TS, Jimenez PC, Wilke DV, Rocha DD, Freitas HPS, Pessoa ODL, La Clair JJ, Costa-Lotufo LV. Identification of pyrroloformamide as a cytokinesis modulator. Chembiochem 2014; 15:501-6. [PMID: 24478218 DOI: 10.1002/cbic.201300717] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Indexed: 12/26/2022]
Abstract
Discovered in the late 1940s, the pyrrolinonodithioles represent a family of potent disulfide-containing natural products. Although they are understood in a synthetic and biosynthetic context, the biological role of these materials remains unresolved. To date, their activity has been suggested to arise through regulating RNA metabolism, and more recently they have been suggested to function as backup thiols for detoxification. Using materials identified through a natural products program, we now identify the biological function of one member of this family, pyrroloformamide, as an antimitotic agent acting, in part, by disrupting cytokinesis.
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Affiliation(s)
- Paula A Abreu
- Departamento de Fisiologia e Farmacologia, Universidade Federal do Ceará, Rua Cel Nunes de Melo 1127, Fortaleza, Ceará, 60430-270 (Brazil)
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Ke C, Jin H, Cai J. AFM studied the effect of celastrol on β1 integrin-mediated HUVEC adhesion and migration. SCANNING 2013; 35:316-326. [PMID: 23239560 DOI: 10.1002/sca.21070] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 11/13/2012] [Accepted: 11/14/2012] [Indexed: 06/01/2023]
Abstract
Integrin-mediated human umbilical vein endothelial cells (HUVECs) adhesion to the extracellular matrix plays a fundamental role in tumor-induced angiogenesis. Celastrol, a traditional Chinese medicine plant, has possessed anticancer and suppressed angiogenesis activities. Here, the mechanism underling the antiangiogenesis capacity of celastrol was investigated by exploring the effect of celastrol on β1(CD29) integrin-mediated cell adhesion and migration. Flow cytometry results showed that the HUVECs highly expressed CD29 and cell adhesion assay indicated that celastrol specifically inhibited the adhesion of HUVECs to fibronectin (FN) without affecting nonspecific adhesion to poly-L-lysine (PLL). After cell FN adhesion being inhibited, the cell surface nanoscale structure and adhesion force were detected by atomic force microscope (AFM). High-resolution imaging revealed that cell morphology and ultrastructure changed a lot after being treated with celastrol. The membrane average roughness (Ra) and the major forces were decreased from 31.34 ± 4.56 nm, 519.60 ± 82.86 pN of 0 μg/ml celastrol to 18.47 ± 6.53 nm, 417.79 ± 53.35 pN of 4.0 μg/ml celastrol, 10.54 ± 2.85 nm, 258.95 ± 38.98 pN of 8.0 μg/ml celastrol, respectively. Accompanying with the decrease of adhesion force, the actin cytoskeleton in the cells was obviously disturbed by the celastrol. All of these changes influenced the migration of HUVECs from the wound-healing migration assay. Taken together, our results suggest that celastrol can be as an inhibitor of HUVEC adhesion to FN. This work provides a novel approach to inhibition of tumor angiogenesis and tumor growth.
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Affiliation(s)
- Changhong Ke
- Department of Chemistry, College of Life Science and Technology, Jinan University, Guangzhou, China
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Applications of snake venom components to modulate integrin activities in cell-matrix interactions. Int J Biochem Cell Biol 2013; 45:1974-86. [PMID: 23811033 DOI: 10.1016/j.biocel.2013.06.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/29/2013] [Accepted: 06/12/2013] [Indexed: 01/23/2023]
Abstract
Snake venom proteins are broadly investigated in the different areas of life science. Direct interaction of these compounds with cells may involve a variety of mechanisms that result in diverse cellular responses leading to the activation or blocking of physiological functions of the cell. In this review, the snake venom components interacting with integrins will be characterized in context of their effect on cellular response. Currently, two major families of snake venom proteins are considered as integrin-binding molecules. The most attention has been devoted to the disintegrin family, which binds certain types of integrins through specific motifs recognized as a tri-peptide structurally localized on an integrin-binding loop. Other snake venom integrin-binding proteins belong to the C-type lectin family. Snake venom molecules bind to the cellular integrins resulting in a modulation of cell signaling and in consequence, the regulation of cell proliferation, migration and apoptosis. Therefore, snake venom research on the integrin-binding molecules may have significance in biomedicine and basic cell biology.
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Tan X, Li C, Yu Z, Wang P, Nian S, Deng Y, Wu W, Wang G. Synthesis of Substituted 6-Amino-4-(2,4-dimethoxyphenyl)-[1,2]dithiolo[4,3- b]pyrrol-5-ones and Their Raising Leukocyte Count Activities. Chem Pharm Bull (Tokyo) 2013; 61:351-7. [DOI: 10.1248/cpb.c12-00791] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Xiangduan Tan
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
| | - Chungang Li
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
| | - Zhenpeng Yu
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
| | - Panfeng Wang
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
| | - Siyun Nian
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
| | - Yifang Deng
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
| | - Wei Wu
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
| | - Guoping Wang
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry
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Nasulewicz-Goldeman A, Uszczyńska B, Szczaurska-Nowak K, Wietrzyk J. siRNA-mediated silencing of integrin β3 expression inhibits the metastatic potential of B16 melanoma cells. Oncol Rep 2012; 28:1567-73. [PMID: 22895695 PMCID: PMC3583467 DOI: 10.3892/or.2012.1963] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 07/20/2012] [Indexed: 01/10/2023] Open
Abstract
Integrins comprise a large family of αβ heterodimeric cell-surface receptors that mediate diverse processes involved in cell-cell and cell-matrix interactions such as cellular adhesion and migration, cell survival and differentiation. It is now well documented that integrins play a crucial role in cancer metastasis and angiogenesis. The β3 integrins appear to have an important stimulatory role in tumour progression and metastasis and, thus, have been often proposed as potential targets for cancer diagnosis and therapy. In this study, we evaluated the in vitro and in vivo properties of B16 mouse melanoma cells with low expression of integrin β3. Proliferation rate, adhesive properties and the ability to migrate and metastasize were studied. Over 90% inhibition of integrin β3 expression was achieved as a result of the transfection with siRNA. No changes in the proliferation rate were observed in siRNA-transfected B16 cells; however, they showed impaired ability to bind to fibronectin. Moreover, inhibition of integrin β3 expression caused almost complete impairment of the ability of B16 cells to migrate through matrigel and metastasize. The mean number of lung metastatic colonies in mice inoculated intravenously with B16 expressing low levels of integrin β3 was decreased to 14 colonies compared to 101 in the control group. These results provide evidence for a direct role of integrin β3 in the adhesion, migration and metastasis processes of mouse melanoma cells and point to the potential therapeutic advantages of siRNAs.
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Affiliation(s)
- Anna Nasulewicz-Goldeman
- Department of Experimental Oncology, Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 12 R. Weigl Street, 53-114 Wroclaw, Poland.
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Integrin-mediated cell-matrix interaction in physiological and pathological blood vessel formation. JOURNAL OF ONCOLOGY 2011; 2012:125278. [PMID: 21941547 PMCID: PMC3175391 DOI: 10.1155/2012/125278] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 07/15/2011] [Indexed: 02/07/2023]
Abstract
Physiological as well as pathological blood vessel formation are fundamentally dependent on cell-matrix interaction. Integrins, a family of major cell adhesion receptors, play a pivotal role in development, maintenance, and remodeling of the vasculature. Cell migration, invasion, and remodeling of the extracellular matrix (ECM) are integrin-regulated processes, and the expression of certain integrins also correlates with tumor progression. Recent advances in the understanding of how integrins are involved in the regulation of blood vessel formation and remodeling during tumor progression are highlighted. The increasing knowledge of integrin function at the molecular level, together with the growing repertoire of integrin inhibitors which allow their selective pharmacological manipulation, makes integrins suited as potential diagnostic markers and therapeutic targets.
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Merrouche R, Bouras N, Coppel Y, Mathieu F, Sabaou N, Lebrihi A. New dithiolopyrrolone antibiotics induced by adding sorbic acid to the culture medium of Saccharothrix algeriensis NRRL B-24137. FEMS Microbiol Lett 2011; 318:41-6. [PMID: 21323983 DOI: 10.1111/j.1574-6968.2011.02246.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Dithiolopyrrolone antibiotics, produced by several microorganisms, are known for their strong antimicrobial activities. This class of antibiotics generated new interest after the discovery of their anticancer and antitumor properties. In this study, four new antibiotics were purified from the fermentation broth of Saccharothrix algeriensis NRRL B-24137 and characterized as dithiolopyrrolone derivatives. These new dithiolopyrrolone antibiotics were induced by adding sorbic acid, as precursor, at a concentration of 5 mM to the semi-synthetic medium. The analysis of the induced antibiotics was carried out by HPLC. The maximal production of the antibiotics PR2, PR8, PR9 and PR10 was 0.08±0.04, 0.21±0.04, 0.13±0.03 and 0.09±0.00 mg L(-1) , respectively, obtained after 8 days of fermentation. The chemical structures of these antibiotics were determined by (1) H- and (13) C-nuclear magnetic resonance, mass and UV-visible data. The four new dithiolopyrrolone antibiotics - PR2, PR8, PR9 and PR10 - were characterized, respectively, as crotonyl-pyrrothine, sorbyl-pyrrothine, 2-hexonyl-pyrrothine and 2-methyl-3-pentenyl-pyrrothine. The minimum inhibitory concentrations of the new induced antibiotics were determined.
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Affiliation(s)
- Rabiâa Merrouche
- Laboratoire de Recherche sur les Produits Bioactifs et la Valorisation de la Biomasse (LPBVB), Ecole Normale Supérieure de Kouba, Alger, Algeria
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Strub C, Brandam C, Meyer XM, Lebrihi A. A stoichiometric reaction scheme for Saccharothrix algeriensis growth and thiolutin production. Process Biochem 2010. [DOI: 10.1016/j.procbio.2010.07.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Merrouche R, Bouras N, Coppel Y, Mathieu F, Monje MC, Sabaou N, Lebrihi A. Dithiolopyrrolone antibiotic formation induced by adding valeric acid to the culture broth of Saccharothrix algeriensis. JOURNAL OF NATURAL PRODUCTS 2010; 73:1164-1166. [PMID: 20507156 DOI: 10.1021/np900808u] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Three new antibiotics were isolated from the fermentation broth of Saccharothrix algeriensis NRRL B-24137 and characterized as the dithiolopyrrolone derivatives valerylpyrrothine (1), isovalerylpyrrothine (2), and formylpyrrothine (3) as well as the known antibiotic aureothricin. The production of the dithiolopyrrolone derivatives was induced by adding valeric acid to the culture medium. The compounds exhibited moderate antimicrobial activity in vitro.
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Affiliation(s)
- Rabiâa Merrouche
- Laboratoire de Recherche sur les Produits Bioactifs et la Valorisation de la Biomasse (LPBVB), Ecole Normale Superieure de Kouba, B.P. 92, 16050 Kouba, Alger, Algeria
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Jia Y, Wu SL, Isenberg JS, Dai S, Sipes JM, Field L, Zeng B, Bandle RW, Ridnour LA, Wink DA, Ramchandran R, Karger BL, Roberts DD. Thiolutin inhibits endothelial cell adhesion by perturbing Hsp27 interactions with components of the actin and intermediate filament cytoskeleton. Cell Stress Chaperones 2010; 15:165-81. [PMID: 19579057 PMCID: PMC2866983 DOI: 10.1007/s12192-009-0130-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2009] [Revised: 06/12/2009] [Accepted: 06/17/2009] [Indexed: 10/20/2022] Open
Abstract
Thiolutin is a dithiole synthesized by Streptomyces sp. that inhibits endothelial cell adhesion and tumor growth. We show here that thiolutin potently inhibits developmental angiogenesis in zebrafish and vascular outgrowth from tissue explants in 3D cultures. Thiolutin is a potent and selective inhibitor of endothelial cell adhesion accompanied by rapid induction of HSPB1 (Hsp27) phosphorylation. The inhibitory effects of thiolutin on endothelial cell adhesion are transient, potentially due to a compensatory increase in Hsp27 protein levels. Accordingly, heat shock induction of Hsp27 limits the anti-adhesive activity of thiolutin. Thiolutin treatment results in loss of actin stress fibers, increased cortical actin as cells retract, and decreased cellular F-actin. Mass spectrometric analysis of Hsp27 binding partners following immunoaffinity purification identified several regulatory components of the actin cytoskeleton that associate with Hsp27 in a thiolutin-sensitive manner including several components of the Arp2/3 complex. Among these, ArpC1a is a direct binding partner of Hsp27. Thiolutin treatment induces peripheral localization of phosphorylated Hsp27 and Arp2/3. Hsp27 also associates with the intermediate filament components vimentin and nestin. Thiolutin treatment specifically ablates Hsp27 interaction with nestin and collapses nestin filaments. These results provide new mechanistic insights into regulation of cell adhesion and cytoskeletal dynamics by Hsp27.
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Affiliation(s)
- Yifeng Jia
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - Shiaw-Lin Wu
- Barnett Institute, Northeastern University, Boston, MA 02115 USA
| | - Jeff S. Isenberg
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
- Hemostasis and Vascular Biology Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261 USA
| | - Shujia Dai
- Barnett Institute, Northeastern University, Boston, MA 02115 USA
| | - John M. Sipes
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - Lyndsay Field
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - Bixi Zeng
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - Russell W. Bandle
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - Lisa A. Ridnour
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - David A. Wink
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - Ramani Ramchandran
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
- Department of Pediatrics, Children’s Research Institute, Medical College of Wisconsin, Milwaukee, WI 53226 USA
| | - Barry L. Karger
- Barnett Institute, Northeastern University, Boston, MA 02115 USA
| | - David D. Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
- NIH, Building 10 Room 2A33, 10 Center Dr MSC1500, Bethesda, MD 20892-1500 USA
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Dai Y, Pierson SE, Dudney WC, Stack BC. Extraribosomal function of metallopanstimulin-1: reducing paxillin in head and neck squamous cell carcinoma and inhibiting tumor growth. Int J Cancer 2010; 126:611-9. [DOI: 10.1002/ijc.24791] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Abstract
Cells, including endothelial cells, continuously sense their surrounding environment and rapidly adapt to changes in order to assure tissues and organs homeostasis. The extracellular matrix (ECM) provides a physical scaffold for cell positioning and represents an instructive interface allowing cells to communicate over short distances. Cell surface receptors of the integrin family emerged through evolution as essential mediators and integrators of ECM-dependent communication. In preclinical studies, pharmacological inhibition of vascular integrins suppressed angiogenesis and inhibited tumor progression. alpha(V)beta(3) and alpha(V)beta(5) were the first integrins targeted to suppress tumor angiogenesis. Subsequently, additional integrins, in particular alpha(1)beta(1), alpha(2)beta(1), alpha(5)beta(1), and alpha(6)beta(4), emerged as potential therapeutic targets. Integrin inhibitors are currently tested in clinical trials for their safety and antiangiogenic/antitumor activity. In this chapter, we review the role of integrins in angiogenesis and present recent advances in the use of integrin antagonists as potential therapeutics in cancer and discuss future perspectives.
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Chorin A, Bijeire L, Monje M, Baziard G, Lebrihi A, Mathieu F. Expression of pyrrothineN-acyltransferase activities inSaccharothrix algeriensisNRRL B-24137: new insights into dithiolopyrrolone antibiotic biosynthetic pathway. J Appl Microbiol 2009; 107:1751-62. [DOI: 10.1111/j.1365-2672.2009.04496.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Alghisi GC, Rüegg C. Vascular Integrins in Tumor Angiogenesis: Mediators and Therapeutic Targets. ACTA ACUST UNITED AC 2009; 13:113-35. [PMID: 16728329 DOI: 10.1080/10623320600698037] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The notion that tumor angiogenesis may have therapeutic implications in the control of tumor growth was introduced by Dr. Judah Folkman in 1971. The approval of Avastin in 2004 as the first antiangiogenic systemic drug to treat cancer patients came as a validation of this visionary concept and opened new perspectives to the treatment of cancer. In addition, this success boosted the field to the quest for new therapeutic targets and antiangiogenic drugs. Preclinical and clinical evidence indicate that vascular integrins may be valid therapeutic targets. In preclinical studies, pharmacological inhibition of integrin function efficiently suppressed angiogenesis and inhibited tumor progression. alphaVbeta3 and alphaVbeta5 were the first vascular integrins targeted to suppress tumor angiogenesis. Subsequent experiments revealed that at least four additional integrins (i.e., alpha1beta1, alpha2beta1, alpha5beta1, and alpha6beta4) might be potential therapeutic targets. In clinical studies low-molecular-weight integrin inhibitors and anti-integrin function-blocking antibodies demonstrated low toxicity and good tolerability and are now being tested in combination with radiotherapy and chemotherapy for anticancer activity in patients. In this article the authors review the role of integrins in angiogenesis, present recent development in the use of alphaVbeta3 and alpha5beta1 integrin antagonists as potential therapeutics in cancer, and discuss future perspectives.
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Affiliation(s)
- Gian Carlo Alghisi
- Centre Pluridisciplinaire d'Oncologie (CePO), Faculty of Biology and Medicine, University of Lausanne, Switzerland
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Huang JS, Lin CM, Cheng YC, Hung KL, Chien CC, Chen SK, Chang CJ, Chen CW, Huang CJ. A vitronectin M381T polymorphism increases risk of hemangioblastoma in patients with VHL gene defect. J Mol Med (Berl) 2009; 87:613-22. [PMID: 19288063 DOI: 10.1007/s00109-009-0456-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 02/04/2009] [Accepted: 02/23/2009] [Indexed: 11/24/2022]
Abstract
Hemangioblastomas, highly vascular tumors, occur sporadically or associated with von Hippel-Lindau (VHL) disease. Diverse mutations in the VHL gene inactivate the VHL protein and constitute the molecular etiology of the disease. Changes in VHL gene were analyzed in patients with multiplex ligation-dependent probe amplification and single-strand conformation polymorphism analyses. We report here that other angiogenesis-related changes in vitronectin were identified with 2D electrophoresis of plasma samples and restriction fragment length polymorphisms. Our findings revealed that most patients (80.0%) with a familial VHL deletion carried the threonine (T) allele at vitronectin codon 381. Adults simultaneously carrying a VHL defect and the T allele were 5.0-fold more likely to be affected by VHL disease than were methionine/methionine (M/M) homozygotes carrying a VHL defect. Patients with sporadic hemangioblastoma, C-terminally truncated VHL protein or a large deletion in the VHL gene, and the T allele were 18.0-fold more likely to develop recurrent disease. Taken together, individuals with mutated VHL are more likely to be affected by familial or recurrent sporadic hemangioblastoma when carrying the M/T or T/T genotype at codon 381 of vitronectin.
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Affiliation(s)
- Jing-Shan Huang
- Department of Neurosurgery, Cathay General Hospital, Taipei, Taiwan
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Dai S, Jia Y, Wu SL, Isenberg JS, Ridnour LA, Bandle RW, Wink DA, Roberts DD, Karger BL. Comprehensive characterization of heat shock protein 27 phosphorylation in human endothelial cells stimulated by the microbial dithiole thiolutin. J Proteome Res 2008; 7:4384-95. [PMID: 18720982 DOI: 10.1021/pr800376w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Thiolutin is a sulfur-based microbial compound with known activity as an angiogenesis inhibitor. Relative to previously studied angiogenesis inhibitors, thiolutin is a remarkably potent inducer of heat shock protein 27 (Hsp27) phosphorylation. This phosphorylation requires p38 kinase but is independent of increased p38 phosphorylation. To elucidate how thiolutin regulates Hsp27 phosphorylation and ultimately angiogenesis, Hsp27 was immunoprecipitated using nonphosphorylated and phospho-Ser78 specific antibodies from lysates of thiolutin treated and untreated human umbilical vein endothelial cells and analyzed by LC-MS. Separate LC-MS analyses of Lys-C, Lys-C plus trypsin, and Lys-C plus Glu-C digests provided 100% sequence coverage, including the identification of a very large 13 kDa Lys-C fragment using a special sample handling procedure (4 M guanidine HCl) prior to the LC-MS analysis to improve the large peptide recovery. The analysis revealed a novel post-translational modification of Hsp27 involving truncation of the N-terminal Met and acetylation of the penultimate Thr. Analysis of a Glu-C fragment containing two phosphorylation sites, Ser78 and Ser82, and a tryptic fragment containing the other phosphorylation site, Ser15, enabled quantitative stoichiometry of Hsp27 phosphorylation by LC-MS. The strategy revealed details of Hsp27 phosphorylation, including significant di-phosphorylation at both Ser78 and Ser82, that would be difficult to obtain by traditional approaches because oligomerization of the hydrophobic N-terminal region of the molecule prevents efficient enzymatic cleavage. The combination of Western blotting, immunoprecipation, and LC-MS provides a quantitative analysis of thiolutin-stimulated Hsp27 phosphorylation and further defines the role of Hsp27 in the antiangiogenic activities of thiolutin and related dithiolethiones.
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Affiliation(s)
- Shujia Dai
- Barnett Institute, Northeastern University, Boston, Massachusetts 02115, USA
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41
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Li B, Lyle MPA, Chen G, Li J, Hu K, Tang L, Alaoui-Jamali MA, Webster J. Substituted 6-amino-4H-[1,2]dithiolo[4,3-b]pyrrol-5-ones: Synthesis, structure–activity relationships, and cytotoxic activity on selected human cancer cell lines. Bioorg Med Chem 2007; 15:4601-8. [PMID: 17467996 DOI: 10.1016/j.bmc.2007.04.017] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2007] [Revised: 03/29/2007] [Accepted: 04/04/2007] [Indexed: 10/23/2022]
Abstract
An efficient synthesis and the cytotoxic activity of a series of substituted 6-amino-4H-[1,2]dithiolo[4,3-b]pyrrol-5-ones 1a-q is described. The synthesis was accomplished in an expedient manner (seven-steps) from commercially available starting materials. Several of the derivatives tested demonstrated significant in vitro cytotoxic activity against the human cancer cell lines H460 (7nM) and LCC6 (> or =28nM). Following SAR and pharmacokinetic studies a derivative was further evaluated for its in vivo anti-tumor activity against a highly angiogenic human melanoma xenograft where it demonstrated significant efficacy as a mono-therapy and in combination with Taxol and Cisplatin.
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Affiliation(s)
- Bin Li
- Welichem Biotech Incorporated, Technology Place, 316-4475 Wayburne Drive, Burnaby, BC, Canada V5G 3L1
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Oikawa T, Onozawa C, Kuranuki S, Igarashi Y, Sato M, Ashino H, Shimamura M, Toi M, Kurakata S. Dipalmitoylation of radicicol results in improved efficacy against tumor growth and angiogenesis in vivo. Cancer Sci 2007; 98:219-25. [PMID: 17233839 PMCID: PMC11158274 DOI: 10.1111/j.1349-7006.2006.00359.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Tumor-related angiogenesis is likely to be a potential target for the treatment of cancer. One key to develop this angiostatic strategy would be to find useful angiogenesis inhibitors. Here we report the effects of radicicol, a microbial angiogenesis inhibitor that we previously identified using the chorioallantoic membrane assay, and its novel analog, 14,16-dipalmitoyl-radicicol, on tumor angiogenesis and growth. As expected for agents containing a penolic hydroxyl group, systemic administration of radicicol had little or no effect on neovascularization triggered by a M5076 mouse tumor cell line or a RMT-1 rat mammary carcinoma cell line established from autochthonous rat mammary tumors induced by 7,12-dimethylbenz[a]anthracene in a mouse dorsal air sac assay system. The agent did not show growth-inhibitory activity against either transplantable M5076 tumors or autochthonous 7,12-dimethylbenz[a]anthracene-induced rat mammary tumors. In contrast, 14,16-dipalmitoyl-radicicol potently suppressed tumor angiogenesis and growth in these experimental models. Furthermore, the analog significantly prolonged the survival rate of M5076-implanted mice. Although not stronger than radicicol, it dose-dependently inhibited embryonic angiogenesis in the chorioallantoic membrane assay, the dose required for half-maximal inhibition (ID(50)) value being 23 microg (27 nmol) per egg, and showed concentration-dependent antiproliferative activity against microvascular endothelial cells in vitro. These data suggest that 14,16-dipalmitoyl-radicicol is a promising antitumor agent with antiangiogenic activity.
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Affiliation(s)
- Tsutomu Oikawa
- Medical Research and Development Center, The Tokyo Metropolitan Institute of Medical Science, Bunkyo-ku, Tokyo 113-8613, Japan.
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Hjelmgaard T, Givskov M, Nielsen J. Expedient total synthesis of pyrrothine natural products and analogs. Org Biomol Chem 2007; 5:344-8. [PMID: 17205179 DOI: 10.1039/b616411k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes an expedient and straightforward total synthesis of the two pyrrothine natural products holomycin (7 steps, 11% overall) and xenorhabdin I (7 steps, 11% overall) and analogs thereof via a common late-stage intermediate. The pathway proceeds via the pyrrothine hydrochloride intermediate (6 steps, 17% overall) which also gave access to very fast synthesis of analogs as demonstrated by the synthesis of , and (7 steps, 11-12% overall).
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Affiliation(s)
- Thomas Hjelmgaard
- Department of Natural Sciences, Bioorganic Chemistry Section, Royal Danish Veterinary and Agricultural University, DK-1871 Frederiksberg C, Denmark
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Oikawa T, Onozawa C, Kuranuki S, Igarashi Y, Sato M, Ashino H, Shimamura M, Toi M, Kurakata S. Dipalmitoylation of radicicol results in improved efficacy against tumor growth and angiogenesis in�vivo. Cancer Sci 2006. [DOI: 10.1111/j.1349-7006.2007.00359.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Bouras N, Mathieu F, Sabaou N, Lebrihi A. Nutritional requirements for the production of dithiolopyrrolone antibiotics by Saccharothrix algeriensis NRRL B-24137. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2006.03.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bouras N, Mathieu F, Sabaou N, Lebrihi A. Effect of amino acids containing sulfur on dithiolopyrrolone antibiotic productions by Saccharothrix algeriensis NRRL B-24137. J Appl Microbiol 2006; 100:390-7. [PMID: 16430516 DOI: 10.1111/j.1365-2672.2005.02762.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To study the effect of sulfur-containing amino acids (L-cysteine, L-cystine, L-methionine and DL-ethionine) on the production of dithiolopyrrolone antibiotics by Saccharothrix algeriensis NRRL B-24137. METHODS AND RESULTS The production levels of dithiolopyrrolones were investigated by using high performance liquid chromatography in a chemically semi-synthetic medium. The production of the studied antibiotics depends upon the nature, concentration and the time of addition of these sources in the culture medium. Both cysteine and cystine favoured the specific productions of dithiolopyrrolones; iso-butyryl-pyrrothine (ISP) by cysteine, however butanoyl-pyrrothine, senecioyl-pyrrothine and tigloyl-pyrrothine by cystine, when added initially to the culture medium. The maximum specific productions of dithiolopyrrolones were observed in the presence of 5 mmol l(-1) cystine for thiolutin, 5 mmol l(-1) cysteine for ISP, and 10 mmol l(-1) cystine for others studied dithiolopyrrolones as shown in Fig. 3. The production of these antibiotics was decreased when the concentrations of cysteine and cystine were in excess. All dithiolopyrrolone specific productions were strongly inhibited by addition of methionine and ethionine, without inhibition of mycelial growth. CONCLUSIONS Among all studied amino acids, cystine and cysteine can be used as supplements for improvement the production of dithiolopyrrolone antibiotics by S. algeriensis NRRL B-24137. SIGNIFICANCE AND IMPACT OF THE STUDY Dithiolopyrrolone antibiotics have many important applications for employing them as medicaments, particularly in the treatment of human and animal cancers. In the present work, the influence of containing-sulfur amino acids on dithiolopyrrolone antibiotic productions was studied. The obtained results can be employed for the optimization of the culture medium for the dithiolopyrrolone productions in higher quantities.
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Affiliation(s)
- N Bouras
- Ecole Nationale Supérieure Agronomique de Toulouse, INPT, Laboratoire de Génie chimique, Equipe Génie des Systèmes Microbiens, Castanet-Tolosan Cedex 1, Toulouse, France
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Duan X, Jia SF, Zhou Z, Langley RR, Bolontrade MF, Kleinerman ES. Association of alphavbeta3 integrin expression with the metastatic potential and migratory and chemotactic ability of human osteosarcoma cells. Clin Exp Metastasis 2005; 21:747-53. [PMID: 16035619 DOI: 10.1007/s10585-005-0599-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Expression of adhesion molecules such as alphavbeta3 integrin has been associated with the metastatic potential of tumor cells. The purpose of this study was to determine whether alphavbeta3 expression correlated with the metastatic potential of human osteosarcoma cells. MATERIALS AND METHODS We developed a series of sublines (LM2-LM7) from human osteosarcoma SAOS parental cells, with progressively increasing potential to form lung metastases in nude mice after intravenous injection. SAOS parental and LM2 cells were poorly metastatic, but LM7 cells resulted in visible metastatic lung nodules by 6-8 weeks. We quantified alphavbeta3 integrin expression using flow cytometry. RESULTS alphavbeta3 expression correlated with the metastatic potential of the cells, with LM7 cells showing the highest expression. LM7 cell adhesion to vitronectin decreased after treatment with echistatin, a RGD-containing peptide antagonist of alphavbeta3. LM7 cells demonstrated higher chemotactic activity than SAOS cells to a homogenate made from lung tissue. This chemotactic activity was also inhibited by echistatin. These data indicated that alphavbeta3 was critical for the migration of LM7 cells to the lung homogenate. Chemotaxis to a liver homogenate was the same for LM7 and SAOS cells. Migration of LM7 cells through lung endothelial cells was higher than that through liver endothelial cells, and echistatin again inhibited this migration. CONCLUSIONS alphavbeta3 integrin expression may play a role in the metastatic potential of osteosarcoma cells by enhancing the ability of the cells to migrate specifically to the lung. Alphavbeta3 integrin may therefore be a potential new target for osteosarcoma.
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Affiliation(s)
- Xiaoping Duan
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
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Stachel HD, Zimmer B, Eckl E, Semmlinger K, Weigand W, Wünsch R, Mayer P. Fused 1,2-Dithioles. Part VII. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590101] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Cao Y, Fu ZD, Wang F, Liu HY, Han R. Anti-angiogenic activity of resveratrol, a natural compound from medicinal plants. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2005; 7:205-213. [PMID: 15621628 DOI: 10.1080/10286020410001690190] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Resveratrol (3,4',5-trihydroxy-trans-stilbene), a naturally occurring phytoalexin found in grapes and wine, possesses cancer-preventive activity. Angiogenesis is a crucial step in the growth and metastasis of cancers. We have investigated the effect of resveratrol on angiogenesis in vitro and ex vivo, and found that resveratrol directly inhibited human umbilical vein endothelial cell growth and decreased the gelatinolytic activities of matrix metalloproteinase-2. Tube formation was inhibited by treatment with resveratrol after plating endothelial cells on Matrigel. Resveratrol treatment also inhibited endothelial cell attachment to basement membrane components fibronectin and laminin, and displays similar behavior on cell chemotaxis. In addition, resveratrol has been found to be an angiogenesis inhibitor in the rat aorta matrix culture model. Therefore, inhibition of angiogenesis associated with cancer may be a novel mechanism for the anticancer activity of resveratrol.
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Affiliation(s)
- Yu Cao
- Department of Pharmacology, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China.
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Minamiguchi K, Kawada M, Ohba SI, Takamoto K, Ishizuka M. Ectopic expression of the amino-terminal peptide of androgen receptor leads to androgen receptor dysfunction and inhibition of androgen receptor-mediated prostate cancer growth. Mol Cell Endocrinol 2004; 214:175-87. [PMID: 15062556 DOI: 10.1016/j.mce.2003.10.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2003] [Accepted: 10/14/2003] [Indexed: 11/24/2022]
Abstract
Androgen receptor (AR) is a ligand-activated transcription factor that requires androgen binding to initiate a series of molecular events leading to specific gene activation. AR has been suggested to form an antiparallel homodimer based on the characteristics of high affinity interaction between the amino (N) and carboxyl (C) termini of it. Recently, it is suggested that AR N-to-C interaction is critical for the ability of this receptor to up-regulate the transcription of androgen-responsive genes, and may be a new target for treatment of prostate cancer (PCa). In this study, we investigated the effect of N-terminal (1-34) peptide of AR (ARN34) on androgen-dependent function in PCa cell. Ectopic expression of ARN34 suppressed both androgen-dependent AR N-to-C interaction and prostate specific antigen transcription. Ectopic expression of ARN34 also caused delaying translocation to the nucleus and the decreasing stability of the AR. Stable expression of ARN34 suppressed androgen-dependent cell growth of LNCaP cells. Moreover, transactivation and cell growth of the AR variant in LNCaP cells by the AR antagonist, hydroxyflutamide, were also inhibited by ARN34. Although treatment of LNCaP cells with androgen drove transition of cells from G1 to S-phase, the cells expressing ARN34 were inhibited to enter into S phase in the presence of androgen. This cell cycle arrest was attended by decrease in cyclin E levels and cyclin-dependent-kinase 2 activity, and increase in p27 levels. Our results demonstrated that disruption of AR N-to-C interaction caused by ARN34 leads to AR dysfunction and inhibition of AR-mediated prostate cancer cell growth. This approach is thus considered to provide a useful therapeutic opinion for blocking AR-mediated PCa growth.
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Affiliation(s)
- Kazuhisa Minamiguchi
- Institute for Chemotherapy, Microbial Chemistry Research Foundation, Numazu, Shizuoka, Japan.
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