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Kasembeli MM, Kaparos E, Bharadwaj U, Allaw A, Khouri A, Acot B, Tweardy DJ. Aberrant function of pathogenic STAT3 mutant proteins is linked to altered stability of monomers and homodimers. Blood 2023; 141:1411-1424. [PMID: 36240433 PMCID: PMC10651785 DOI: 10.1182/blood.2021015330] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 09/22/2022] [Accepted: 10/04/2022] [Indexed: 11/20/2022] Open
Abstract
STAT3 mutations, predominantly in the DNA-binding domain (DBD) and Src-homology 2 domain (SH2D), cause rare cases of immunodeficiency, malignancy, and autoimmunity. The exact mechanisms by which these mutations abrogate or enhance STAT3 function are not completely understood. Here, we examined how loss-of-function (LOF) and gain-of-function (GOF) STAT3 mutations within the DBD and SH2D affect monomer and homodimer protein stability as well as their effect on key STAT3 activation events, including recruitment to phosphotyrosine (pY) sites within peptide hormone receptors, tyrosine phosphorylation at Y705, dimerization, nuclear translocation, and DNA binding. The DBD LOF mutants showed reduced DNA binding when homodimerized, whereas the DBD GOF mutants showed increased DNA binding. DBD LOF and GOF mutants showed minimal changes in other STAT3 functions or in monomer or homodimer protein stability. However, SH2D LOF mutants demonstrated reduced conformational stability as either monomers or homodimers, leading to decreased pY-peptide recruitment, tyrosine phosphorylation, dimerization, nuclear localization, and DNA binding. In contrast, cancer-causing SH2D GOF mutants showed increased STAT3 homodimer stability, which increased their DNA binding. Of note, a small-molecule inhibitor of STAT3 that targets the tyrosine phosphopeptide-binding pocket within the STAT3 SH2D potently inhibited cell proliferation driven by STAT3 SH2D GOF mutants. These findings indicate that the stability of STAT3 protein monomer and homodimer is critical for the pathogenesis of diseases caused by SH2D LOF and GOF mutations and suggest that agents that modulate STAT3 monomer and/or homodimer protein stability may have therapeutic value in diseases caused by these mutations.
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Affiliation(s)
- Moses M. Kasembeli
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Efiyenia Kaparos
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Uddalak Bharadwaj
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Ahmad Allaw
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Alain Khouri
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Bianca Acot
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - David J. Tweardy
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
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2
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Zhao T, Karki N, Zoltowski BD, Matthews DA. Allosteric regulation in STAT3 interdomains is mediated by a rigid core: SH2 domain regulation by CCD in D170A variant. PLoS Comput Biol 2022; 18:e1010794. [PMID: 36542668 PMCID: PMC9815575 DOI: 10.1371/journal.pcbi.1010794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 01/05/2023] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Signal Transducer and Activator of Transcription 3 (STAT3) plays a crucial role in cancer development and thus is a viable target for cancer treatment. STAT3 functions as a dimer mediated by phosphorylation of the SRC-homology 2 (SH2) domain, a key target for therapeutic drugs. While great efforts have been employed towards the development of compounds that directly target the SH2 domain, no compound has yet been approved by the FDA due to a lack of specificity and pharmacologic efficacy. Studies have shown that allosteric regulation of SH2 via the coiled-coil domain (CCD) is an alternative drug design strategy. Several CCD effectors have been shown to modulate SH2 binding and affinity, and at the time of writing at least one drug candidate has entered phase I clinical trials. However, the mechanism for SH2 regulation via CCD is poorly understood. Here, we investigate structural and dynamic features of STAT3 and compare the wild type to the reduced function variant D170A in order to delineate mechanistic differences and propose allosteric pathways. Molecular dynamics simulations were employed to explore conformational space of STAT3 and the variant, followed by structural, conformation, and dynamic analysis. The trajectories explored show distinctive conformational changes in the SH2 domain for the D170A variant, indicating long range allosteric effects. Multiple analyses provide evidence for long range communication pathways between the two STAT3 domains, which seem to be mediated by a rigid core which connects the CCD and SH2 domains via the linker domain (LD) and transmits conformational changes through a network of short-range interactions. The proposed allosteric mechanism provides new insight into the understanding of intramolecular signaling in STAT3 and potential pharmaceutical control of STAT3 specificity and activity.
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Affiliation(s)
- Tingting Zhao
- Department of Chemistry, Southern Methodist University, Dallas, Texas, United States of America
| | - Nischal Karki
- Department of Chemistry, Southern Methodist University, Dallas, Texas, United States of America
| | - Brian D. Zoltowski
- Department of Chemistry, Southern Methodist University, Dallas, Texas, United States of America
| | - Devin A. Matthews
- Department of Chemistry, Southern Methodist University, Dallas, Texas, United States of America
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3
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Wang ZF, Nai XL, Xu Y, Pan FH, Tang FS, Qin QP, Yang L, Zhang SH. Cell nucleus localization and high anticancer activity of quinoline-benzopyran rhodium(III) metal complexes as therapeutic and fluorescence imaging agents. Dalton Trans 2022; 51:12866-12875. [PMID: 35861361 DOI: 10.1039/d2dt01929a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four novel rhodium(III) complexes, [RhIII(QB1)Cl3(DMSO)] (RhN1), [RhIII(QB2)Cl3(CH3OH)]·CH3OH (RhN2), [RhIII(QB3)Cl3(CH3OH)]·CH3OH (RhS), and [RhIII(QB4)Cl3(DMSO)] (RhQ), bearing quinoline-benzopyran ligands (QB1-QB4) were synthesized and used to develop highly anticancer therapeutic and fluorescence imaging agents. Compared with the QB1-QB4 ligands (IC50 > 89.2 ± 1.7 μM for A549/DDP), RhN1, RhN2, RhS and RhQ exhibit selective cytotoxicity against lung carcinoma cisplatin-resistant A549/DDP (A549CDDP) cancer cells, with IC50 values in the range of 0.08-2.7 μM. The fluorescent imaging agent RhQ with the more extended planar QB4 ligand exhibited high anticancer activity in A549CDDP cells and was found in the cell nucleus fraction, whereas RhS had no fluorescence properties. RhQ and RhS may trigger cell apoptosis by causing DNA damage and initiating the mitochondrial dysfunction pathway. Furthermore, RhQ has a higher antitumor efficacy (ca. 55.3%) than RhS (46.4%) and cisplatin (CDDP, 33.1%), and RhQ demonstrated significantly lower toxicity in vivo than CDDP, making it a promising Rh(III)-based anticancer therapeutic and fluorescence imaging agent.
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Affiliation(s)
- Zhen-Feng Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, P R China. .,College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, 525000, P R China
| | - Xiao-Ling Nai
- College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Yue Xu
- College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Feng-Hua Pan
- College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Fu-Shun Tang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, P R China.
| | - Qi-Pin Qin
- College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Lin Yang
- College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Shu-Hua Zhang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, P R China. .,College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, Guangdong, 525000, P R China
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4
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Zhang Z, Nakata E, Dinh H, Saimura M, Rajendran A, Matsuda K, Morii T. Tuning the Reactivity of a Substrate for SNAP-Tag Expands Its Application for Recognition-Driven DNA-Protein Conjugation. Chemistry 2021; 27:18118-18128. [PMID: 34747070 DOI: 10.1002/chem.202103304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Indexed: 11/09/2022]
Abstract
Recognition-driven modification has been emerging as a novel approach to modifying biomolecular targets of interest site-specifically and efficiently. To this end, protein modular adaptors (MAs) are the ideal reaction model for recognition-driven modification of DNA as they consist of both a sequence-specific DNA-binding domain (DBD) and a self-ligating protein-tag. Coupling DNA recognition by DBD and the chemoselective reaction of the protein tag could provide a highly efficient sequence-specific reaction. However, combining an MA consisting of a reactive protein-tag and its substrate, for example, SNAP-tag and benzyl guanine (BG), revealed rather nonselective reaction with DNA. Therefore new substrates of SNAP-tag have been designed to realize sequence-selective rapid crosslinking reactions of MAs with SNAP-tag. The reactions of substrates with SNAP-tag were verified by kinetic analyses to enable the sequence-selective crosslinking reaction of MA. The new substrate enables the distinctive orthogonality of SNAP-tag against CLIP-tag to achieve orthogonal DNA-protein crosslinking by six unique MAs.
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Affiliation(s)
- Zhengxiao Zhang
- Institute of Advanced Energy, Kyoto University Uji, Kyoto, 6110011, Japan
| | - Eiji Nakata
- Institute of Advanced Energy, Kyoto University Uji, Kyoto, 6110011, Japan
| | - Huyen Dinh
- Institute of Advanced Energy, Kyoto University Uji, Kyoto, 6110011, Japan
| | - Masayuki Saimura
- Institute of Advanced Energy, Kyoto University Uji, Kyoto, 6110011, Japan
| | | | - Kazunari Matsuda
- Institute of Advanced Energy, Kyoto University Uji, Kyoto, 6110011, Japan
| | - Takashi Morii
- Institute of Advanced Energy, Kyoto University Uji, Kyoto, 6110011, Japan
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5
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Loreto D, Merlino A. The interaction of rhodium compounds with proteins: A structural overview. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213999] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Dong J, Cheng XD, Zhang WD, Qin JJ. Recent Update on Development of Small-Molecule STAT3 Inhibitors for Cancer Therapy: From Phosphorylation Inhibition to Protein Degradation. J Med Chem 2021; 64:8884-8915. [PMID: 34170703 DOI: 10.1021/acs.jmedchem.1c00629] [Citation(s) in RCA: 93] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Signal transducer and activator of transcription 3 (STAT3) is a transcription factor that regulates various biological processes, including proliferation, metastasis, angiogenesis, immune response, and chemoresistance. In normal cells, STAT3 is tightly regulated to maintain a transiently active state, while persistent STAT3 activation occurs frequently in cancers, associating with a poor prognosis and tumor progression. Targeting the STAT3 protein is a potentially promising therapeutic strategy for tumors. Although none of the STAT3 inhibitors has been marketed yet, a few of them have succeeded in entering clinical trials. This Review aims to systematically summarize the progress of the last 5 years in the discovery of directive STAT3 small-molecule inhibitors and degraders, focusing primarily on their structural features, design strategies, and bioactivities. We hope this Review will shed light on future drug design and inhibitor optimization to accelerate the discovery process of STAT3 inhibitors or degraders.
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Affiliation(s)
- Jinyun Dong
- Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China.,Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310018, China
| | - Xiang-Dong Cheng
- Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China.,Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310018, China
| | - Wei-Dong Zhang
- School of Pharmacy, Naval Medical University, Shanghai 200433, China
| | - Jiang-Jiang Qin
- Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China.,Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310018, China
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7
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Wang YF, Wang XJ, Lu Z, Liu SR, Jiang Y, Wan XQ, Cheng CC, Shi LH, Wang LH, Ding Y. Overexpression of Stat3 increases circulating cfDNA in breast cancer. Breast Cancer Res Treat 2021; 187:69-80. [PMID: 33630196 DOI: 10.1007/s10549-021-06142-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 02/08/2021] [Indexed: 12/18/2022]
Abstract
PURPOSE Current studies on circulating cell-free DNA (cfDNA) have been focusing on its potential as biomarkers in liquid biopsy by detecting its content or genetic and epigenetic changes for the evaluation of tumor burden and therapeutic efficacy. However, the regulatory mechanism of cfDNA release remains unclear. Stat3 has been documented as an oncogene for the development and metastasis of breast cancer cells. In this study, we investigated whether Stat3 affects the release of cfDNA into blood and its association with the number of circulating tumor cells (CTCs). METHODS The cfDNA level in plasma of patients with breast cancer and healthy volunteers were determined by quantitative real-time PCR. Three mouse breast cancer models with different Stat3 expression were generated and used to established three breast cancer orthotopic animal models to examine the effect of Stat3 on cfDNA release in vivo. Stat3 mediated Epithelial-mesenchymal phenotype transition of CTCs was determined by immunofluorescence assay and Western blot assay. RESULTS The data showed that Stat3 increased circulating cfDNA, which is correlated with the increased volume of primary tumors and number of CTCs, accompanied with the dynamic EMT changes regulated by Snail induction. Furthermore, the high level of total circulating cfDNA and Stat3-cfDNA in patients with breast cancer were detected by quantitative real-time PCR using GAPDH and Stat3 primers. CONCLUSION Our results suggested that Stat3 increases the circulating cfDNA and CTCs in breast cancer.
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Affiliation(s)
- Yi-Fei Wang
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Affiliated Hospital, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Xue-Jian Wang
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Key Laboratory of Applied Pharmacology, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Zhong Lu
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Affiliated Hospital, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Shu-Rong Liu
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Affiliated Hospital, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Yu Jiang
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Affiliated Hospital, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Xiao-Qing Wan
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China
| | - Cong-Cong Cheng
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Affiliated Hospital, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Li-Hong Shi
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Key Laboratory of Applied Pharmacology, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Li-Hua Wang
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China.,Affiliated Hospital, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Yi Ding
- Laboratory of Molecular Oncology, Weifang Medical College, Weifang, 261053, Shandong, China. .,Key Laboratory of Applied Pharmacology, Weifang Medical University, Weifang, 261053, Shandong, China.
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8
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Liu W, Zhu F, Yan J, Liu Y, Chen C, Zhang K, Zhao X, Chen J. Identification and Validation of STAT6 as a Prognostic and Predictive Biomarker in Acute Myeloid Leukemia. Onco Targets Ther 2020; 13:11165-11176. [PMID: 33173308 PMCID: PMC7648156 DOI: 10.2147/ott.s272757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 10/05/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Acute myeloid leukemia (AML) is one of the most common hematological diseases in adults. The overall survival rate remains unsatisfactory. It is urgent to identify potential prognostic biomarkers and develop new molecular therapeutic strategies for AML. Signal transducer and activator of transcription (STAT) is a family of genes that encode intracellular transcription factors. STATs are associated with leukemogenesis, cellular transformation, and cell cycle in AML. METHODS We used sequencing data and clinical data from The Cancer Genome Atlas (TCGA) and ONCOMINE to identify expression difference, gene variability and correlation as well as prognostic effects of STAT genes in AML patients. Then, we verified the expression difference of STAT6 between healthy control and AML patients and its prognostic impact in Gene Expression Omnibus (GEO) database and our own recruited cohort. RESULTS The mRNA level of STAT6 was increased in AML patients among TCGA, GEO and ONCOMINE public datasets and was found to be an independent risk factor of overall survival in all AML patients and patients who only received chemotherapy by multivariate analysis. In our study, STAT6 mRNA level was markedly up-regulated in AML patients (n=105) compared to healthy donor (n=39) (P=0.0435) as a validated cohort. Patients that only received chemotherapy in high STAT6 group showed significantly lower overall survival (OS) (P=0.0055). CONCLUSION STAT6 expression was increased in AML patients. STAT6 was found to be an adverse prognosis factor in AML patients, especially those who only received chemotherapy treatments.
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Affiliation(s)
- Wei Liu
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan410008, People’s Republic of China
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA91010, USA
| | - Feiyue Zhu
- Department of Hematology, Loudi Central Hospital, Loudi, Hunan417000, People’s Republic of China
| | - Jiazhuo Yan
- Department of Gynaecological Radiotherapy, The Affiliated Tumor Hospital of Harbin Medical University, Harbin, Heilongjiang150081, People’s Republic of China
| | - Yi Liu
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan410008, People’s Republic of China
| | - Cong Chen
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan410008, People’s Republic of China
| | - Kaixuan Zhang
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan410008, People’s Republic of China
| | - Xielan Zhao
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan410008, People’s Republic of China
| | - Jingyuan Chen
- Research Institute of Blood Lipid and Atherosclerosis, Central South University, Changsha, Hunan410011, People’s Republic of China
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Dai SY, Yang D. A Visible and Near-Infrared Light Activatable Diazocoumarin Probe for Fluorogenic Protein Labeling in Living Cells. J Am Chem Soc 2020; 142:17156-17166. [PMID: 32870680 DOI: 10.1021/jacs.0c08068] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Chemical modification of proteins in living cells permits valuable glimpses into the molecular interactions that underpin dynamic cellular events. While genetic engineering methods are often preferred, selective labeling of endogenous proteins in a complex intracellular milieu with chemical approaches represents a significant challenge. In this study, we report novel diazocoumarin compounds that can be photoactivated by visible (430-490 nm) and near-infrared light (800 nm) irradiation to photo-uncage reactive carbene intermediates, which could subsequently undergo an insertion reaction with concomitant fluorescence "turned on". With these new molecules in hand, we have developed a new approach for rapid, selective, and fluorogenic labeling of endogenous protein in living cells. By using CA-II and eDHFR as model proteins, we demonstrated that subcellular localization of proteins can be precisely visualized by live-cell imaging and protein levels can be reliably quantified in multiple cell types using flow cytometry. Dynamic protein regulations such as hypoxia-induced CA-IX accumulation can also be detected. In addition, by two-photon excitation with an 800 nm laser, cell-selective labeling can also be achieved with spatially controlled irradiation. Our method circumvents the cytotoxicity of UV light and obviates the need for introducing external reporters with "click chemistries". We believe that this approach of fluorescence labeling of endogenous protein by bioorthogonal photoirradiation opens up exciting opportunities for discoveries and mechanistic interrogation in chemical biology.
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Affiliation(s)
- Sheng-Yao Dai
- Morningside Laboratory for Chemical Biology, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Dan Yang
- Morningside Laboratory for Chemical Biology, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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10
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Bharadwaj U, Kasembeli MM, Robinson P, Tweardy DJ. Targeting Janus Kinases and Signal Transducer and Activator of Transcription 3 to Treat Inflammation, Fibrosis, and Cancer: Rationale, Progress, and Caution. Pharmacol Rev 2020; 72:486-526. [PMID: 32198236 PMCID: PMC7300325 DOI: 10.1124/pr.119.018440] [Citation(s) in RCA: 165] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Before it was molecularly cloned in 1994, acute-phase response factor or signal transducer and activator of transcription (STAT)3 was the focus of intense research into understanding the mammalian response to injury, particularly the acute-phase response. Although known to be essential for liver production of acute-phase reactant proteins, many of which augment innate immune responses, molecular cloning of acute-phase response factor or STAT3 and the research this enabled helped establish the central function of Janus kinase (JAK) family members in cytokine signaling and identified a multitude of cytokines and peptide hormones, beyond interleukin-6 and its family members, that activate JAKs and STAT3, as well as numerous new programs that their activation drives. Many, like the acute-phase response, are adaptive, whereas several are maladaptive and lead to chronic inflammation and adverse consequences, such as cachexia, fibrosis, organ dysfunction, and cancer. Molecular cloning of STAT3 also enabled the identification of other noncanonical roles for STAT3 in normal physiology, including its contribution to the function of the electron transport chain and oxidative phosphorylation, its basal and stress-related adaptive functions in mitochondria, its function as a scaffold in inflammation-enhanced platelet activation, and its contributions to endothelial permeability and calcium efflux from endoplasmic reticulum. In this review, we will summarize the molecular and cellular biology of JAK/STAT3 signaling and its functions under basal and stress conditions, which are adaptive, and then review maladaptive JAK/STAT3 signaling in animals and humans that lead to disease, as well as recent attempts to modulate them to treat these diseases. In addition, we will discuss how consideration of the noncanonical and stress-related functions of STAT3 cannot be ignored in efforts to target the canonical functions of STAT3, if the goal is to develop drugs that are not only effective but safe. SIGNIFICANCE STATEMENT: Key biological functions of Janus kinase (JAK)/signal transducer and activator of transcription (STAT)3 signaling can be delineated into two broad categories: those essential for normal cell and organ development and those activated in response to stress that are adaptive. Persistent or dysregulated JAK/STAT3 signaling, however, is maladaptive and contributes to many diseases, including diseases characterized by chronic inflammation and fibrosis, and cancer. A comprehensive understanding of JAK/STAT3 signaling in normal development, and in adaptive and maladaptive responses to stress, is essential for the continued development of safe and effective therapies that target this signaling pathway.
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Affiliation(s)
- Uddalak Bharadwaj
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Moses M Kasembeli
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Prema Robinson
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - David J Tweardy
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
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11
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Rodríguez J, Martínez-Calvo M. Transition-Metal-Mediated Modification of Biomolecules. Chemistry 2020; 26:9792-9813. [PMID: 32602145 DOI: 10.1002/chem.202001287] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 06/25/2020] [Indexed: 01/15/2023]
Abstract
The site-selective modification of biomolecules has grown spectacularly in recent years. The presence of a large number of functional groups in a biomolecule makes its chemo- and regioselective modification a challenging goal. In this context, transition-metal-mediated reactions are emerging as a powerful tool owing to their unique reactivity and good functional group compatibility, allowing highly efficient and selective bioconjugation reactions that operate under mild conditions. This Minireview focuses on the current state of organometallic chemistry for bioconjugation, highlighting the potential of transition metals for the development of chemoselective and site-specific methods for functionalization of peptides, proteins and nucleic acids. The importance of the selection of ligands attached to the transition metal for conferring the desired chemoselectivity will be highlighted.
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Affiliation(s)
- Jessica Rodríguez
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier/CNRS UMR 5069, 118 Route de Narbonne, 31062, Toulouse Cedex 09, France
| | - Miguel Martínez-Calvo
- Centro de Investigaciones Científicas Avanzadas (CICA), AE CICA-INIBIC, Departamento de Química, Facultade de Ciencias, Universidade da Coruña, Campus de Elviña, 15071 A, Coruña, Galicia, Spain
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12
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Minus MB, Wang H, Munoz JO, Stevens AM, Mangubat-Medina AE, Krueger MJ, Liu W, Kasembeli MM, Cooper JC, Kolosov MI, Tweardy DJ, Redell MS, Ball ZT. Targeting STAT3 anti-apoptosis pathways with organic and hybrid organic-inorganic inhibitors. Org Biomol Chem 2020; 18:3288-3296. [PMID: 32286579 PMCID: PMC7286531 DOI: 10.1039/c9ob02682g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Recurrence and drug resistance are major challenges in the treatment of acute myeloid leukemia (AML) that spur efforts to identify new clinical targets and active agents. STAT3 has emerged as a potential target in resistant AML, but inhibiting STAT3 function has proven challenging. This paper describes synthetic studies and biological assays for a naphthalene sulfonamide inhibitor class of molecules that inhibit G-CSF-induced STAT3 phosphorylation in cellulo and induce apoptosis in AML cells. We describe two different approaches to inhibitor design: first, variation of substituents on the naphthalene sulfonamide core allows improvements in anti-STAT activity and creates a more thorough understanding of anti-STAT SAR. Second, a novel approach involving hybrid sulfonamide-rhodium(ii) conjugates tests our ability to use cooperative organic-inorganic binding for drug development, and to use SAR studies to inform metal conjugate design. Both approaches have produced compounds with improved binding potency. In vivo and in cellulo experiments further demonstrate that these approaches can also lead to improved activity in living cells, and that compound 3aa slows disease progression in a xenograft model of AML.
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Affiliation(s)
- Matthew B Minus
- Prairieview A&M University, Prairie View, TX 77446, USA and Department of Chemistry, Rice University, Houston, TX 77005, USA.
| | - Haopei Wang
- Department of Chemistry, Rice University, Houston, TX 77005, USA.
| | - Jaime O Munoz
- Baylor College of Medicine, Texas Children's Cancer Center, Houston, TX 77030, USA
| | - Alexandra M Stevens
- Baylor College of Medicine, Texas Children's Cancer Center, Houston, TX 77030, USA
| | | | - Michael J Krueger
- Baylor College of Medicine, Texas Children's Cancer Center, Houston, TX 77030, USA
| | - Wei Liu
- Baylor College of Medicine, Texas Children's Cancer Center, Houston, TX 77030, USA
| | - Moses M Kasembeli
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Julian C Cooper
- Department of Chemistry, Rice University, Houston, TX 77005, USA.
| | - Mikhail I Kolosov
- Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - David J Tweardy
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA and Department of Molecule and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Michele S Redell
- Baylor College of Medicine, Texas Children's Cancer Center, Houston, TX 77030, USA
| | - Zachary T Ball
- Department of Chemistry, Rice University, Houston, TX 77005, USA.
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13
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Qin J, Shen X, Zhang J, Jia D. Allosteric inhibitors of the STAT3 signaling pathway. Eur J Med Chem 2020; 190:112122. [DOI: 10.1016/j.ejmech.2020.112122] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/04/2020] [Accepted: 02/04/2020] [Indexed: 01/13/2023]
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14
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Natarajan K, Müller-Klieser D, Rubner S, Berg T. Stafia-1: a STAT5a-Selective Inhibitor Developed via Docking-Based Screening of in Silico O-Phosphorylated Fragments. Chemistry 2019; 26:148-154. [PMID: 31503360 PMCID: PMC6973011 DOI: 10.1002/chem.201904147] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Indexed: 01/27/2023]
Abstract
We present a new approach for the identification of inhibitors of phosphorylation-dependent protein-protein interaction domains, in which phenolic fragments are adapted by in silico O-phosphorylation before docking-based screening. From a database of 10 369 180 compounds, we identified 85 021 natural product-derived phenolic fragments, which were virtually O-phosphorylated and screened for in silico binding to the STAT3 SH2 domain. Nine screening hits were then synthesized, eight of which showed a degree of in vitro inhibition of STAT3. After analysis of its selectivity profile, the most potent inhibitor was then developed to Stafia-1, the first small molecule shown to preferentially inhibit the STAT family member STAT5a over the close homologue STAT5b. A phosphonate prodrug based on Stafia-1 inhibited STAT5a with selectivity over STAT5b in human leukemia cells, providing the first demonstration of selective in vitro and intracellular inhibition of STAT5a by a small-molecule inhibitor.
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Affiliation(s)
- Kalaiselvi Natarajan
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Daniel Müller-Klieser
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Stefan Rubner
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Thorsten Berg
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
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15
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Gräb J, Berg A, Blechschmidt L, Klüver B, Rubner S, Fu DY, Meiler J, Gräber M, Berg T. The STAT5b Linker Domain Mediates the Selectivity of Catechol Bisphosphates for STAT5b over STAT5a. ACS Chem Biol 2019; 14:796-805. [PMID: 30835430 DOI: 10.1021/acschembio.9b00137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
STAT family proteins are important mediators of cell signaling and represent therapeutic targets for the treatment of human diseases. Most STAT inhibitors target the protein-protein interaction domain, the SH2 domain, but specificity for a single STAT protein is often limited. Recently, we developed catechol bisphosphates as the first inhibitors of STAT5b demonstrated to exhibit a high degree of selectivity over the close homologue STAT5a. Here, we show that the amino acid in position 566 of the linker domain, not the SH2 domain, is the main determinant of specificity. Arg566 in wild-type STAT5b favors tight binding of catechol bisphosphates, while Trp566 in wild-type STAT5a does not. Amino acid 566 also determines the affinity for a tyrosine-phosphorylated peptide derived from the EPO receptor for STAT5a and STAT5b, demonstrating the functional relevance of the STAT5 linker domain for the adjacent SH2 domain. These results provide the first demonstration that a residue in the linker domain can determine the affinity of nonpeptidic small-molecule inhibitors for the SH2 domain of STAT proteins. We propose targeting the interface between the SH2 domain and linker domain as a novel design approach for the development of potent and selective STAT inhibitors. In addition, our data suggest that the linker domain could contribute to the enigmatically divergent biological functions of the two STAT5 proteins.
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Affiliation(s)
- Julian Gräb
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
| | - Angela Berg
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
| | - Linda Blechschmidt
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
| | - Barbara Klüver
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
| | - Stefan Rubner
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
| | - Darwin Y. Fu
- Center for Structural Biology, Vanderbilt University, 465 21st Avenue South, BIOSCI/MRBIII, Nashville, Tennessee 37221, United States
| | - Jens Meiler
- Center for Structural Biology, Vanderbilt University, 465 21st Avenue South, BIOSCI/MRBIII, Nashville, Tennessee 37221, United States
| | - Martin Gräber
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
| | - Thorsten Berg
- Institute of Organic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
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16
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Ball ZT. Protein Substrates for Reaction Discovery: Site-Selective Modification with Boronic Acid Reagents. Acc Chem Res 2019; 52:566-575. [PMID: 30821435 DOI: 10.1021/acs.accounts.8b00626] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Chemical modification of natural proteins must navigate difficult selectivity questions in a complex polyfunctional aqueous environment, within a narrow window of acceptable conditions. Limits on solvent mixtures, pH, and temperature create challenges for most synthetic methods. While a protein's complex polyfunctional environment undoubtedly creates challenges for traditional reactions, we wondered if it also might create opportunities for pursuing new bioconjugation reactivity directly on protein substrates. This Account describes our efforts to date to discover and develop new and useful reactivity for protein modification by starting from an open-ended screen of potential transition-metal catalysts for boronic acid reactivity with a model protein substrate. By starting from a broad screen, we were hoping to take advantage of the very many potential reactive sites on even a small model protein. And perhaps more importantly, whole proteins as reaction screening substrates might exhibit uniquely reactive local environments, the results of a dense combination of functional groups that would be nearly impossible to mimic in a small-molecule context. This effort has resulted in the discovery of four new protein modification reactions with boronic acid reagents, including a remarkable modification of specific backbone N-H bonds. This histidine-directed Chan-Lam coupling, based on specific proximity of an imidazole and two amide groups, is one important example of powerful reactivity that depends on a combination of functional groups that proteins make possible. Other bioconjugation reactions uncovered include a three-component tyrosine metalation with rhodium(III), a nickel-catalyzed cysteine arylation, and an unusual ascorbate-mediated oxidative process for N-terminal modification. The remarkably broad scope of reactivity types encountered in this work is a testament to the breadth of boronic acid reactivity. It is also a demonstration of the diverse reactivities that are possible by the combined alteration of boronic acid structure and metal promoter. The discovery of specific backbone modification chemistry has been a broadly empowering reactivity. Pyroglutamate, a naturally occurring posttranslational modification, exhibits remarkably high reactivity in histidine-directed backbone modification, which allows us to treat pyroglutamate as a reactive bioorthogonal handle that is readily incorporated into proteins of interest by natural machinery. In another research direction, the development of a vinylogous photocleavage system has allowed us to view backbone modification as a photocaging modification which is released by exposure to light.
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Affiliation(s)
- Zachary T. Ball
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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Ohata J, Martin SC, Ball ZT. Metallvermittelte Funktionalisierung natürlicher Peptide und Proteine: Biokonjugation mit Übergangsmetallen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201807536] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jun Ohata
- Department of Chemistry Rice University 6100 Main Houston TX 77005 USA
| | - Samuel C. Martin
- Department of Chemistry Rice University 6100 Main Houston TX 77005 USA
| | - Zachary T. Ball
- Department of Chemistry Rice University 6100 Main Houston TX 77005 USA
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18
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Ohata J, Martin SC, Ball ZT. Metal‐Mediated Functionalization of Natural Peptides and Proteins: Panning for Bioconjugation Gold. Angew Chem Int Ed Engl 2019; 58:6176-6199. [DOI: 10.1002/anie.201807536] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Jun Ohata
- Department of Chemistry Rice University 6100 Main Houston TX 77005 USA
| | - Samuel C. Martin
- Department of Chemistry Rice University 6100 Main Houston TX 77005 USA
| | - Zachary T. Ball
- Department of Chemistry Rice University 6100 Main Houston TX 77005 USA
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Lu S, He X, Ni D, Zhang J. Allosteric Modulator Discovery: From Serendipity to Structure-Based Design. J Med Chem 2019; 62:6405-6421. [PMID: 30817889 DOI: 10.1021/acs.jmedchem.8b01749] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shaoyong Lu
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Clinical and Fundamental Research Center, Renji Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
- Medicinal Bioinformatics Center, Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
| | - Xinheng He
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Clinical and Fundamental Research Center, Renji Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
| | - Duan Ni
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Clinical and Fundamental Research Center, Renji Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
| | - Jian Zhang
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Clinical and Fundamental Research Center, Renji Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
- Medicinal Bioinformatics Center, Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
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Abstract
As a rare element with no known natural biological function, rhodium has a limited history in biological chemistry and chemical biology. However, rhodium complexes have unique structure and reactivity attributes, and chemists have increasingly used these attributes to probe and perturb living systems. This brief review focuses on recent advances in the use of rhodium complexes in biological contexts, including medicinal chemistry, protein science, and chemical biology. In particular, we highlight both structure- and reactivity-driven approaches to biological probes and discuss how coordination environment affects molecular properties in a biological environment.
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Affiliation(s)
- Jun Ohata
- Department of Chemistry, Rice University, 6100 Main St., Houston, Texas, USA.
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Kang TS, Ko CN, Zhang JT, Wu C, Wong CY, Ma DL, Leung CH. Rhodium(III)-Based Inhibitor of the JMJD3-H3K27me3 Interaction and Modulator of the Inflammatory Response. Inorg Chem 2018; 57:14023-14026. [DOI: 10.1021/acs.inorgchem.8b02256] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao 519020, China
| | - Chung-Nga Ko
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong 518000, China
| | - Jia-Tong Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao 519020, China
| | - Chun Wu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong 518000, China
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Hong Kong 518000, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong 518000, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao 519020, China
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Wang S, Teng Z, Wang C, Wang G. Stable and Efficient Nitrogen-Containing Carbon-Based Electrocatalysts for Reactions in Energy-Conversion Systems. CHEMSUSCHEM 2018; 11:2267-2295. [PMID: 29770593 DOI: 10.1002/cssc.201800509] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 04/21/2018] [Indexed: 05/14/2023]
Abstract
High activity and stability are crucial for the practical use of electrocatalysts in fuel cells, metal-air batteries, and water electrolysis, including the oxygen reduction reaction, hydrogen evolution reaction, oxygen evolution reaction, and oxidation reactions of formic acid and alcohols. Electrocatalysts based on nitrogen-containing carbon (N-C) materials show promise in catalyzing these reactions; however, there is no systematic review of strategies for the engineering of active and stable N-C-based electrocatalysts. Herein, a comprehensive comparison of recently reported N-C-based electrocatalysts regarding both electrocatalytic activity and long-term stability is presented. In the first part of this review, the relationships between the electrocatalytic reactions and selection of the element to modify the N-C-based materials are discussed. Afterwards, synthesis methods for N-C-based electrocatalysts are summarized, and strategies for the synthesis of highly stable N-C-based electrocatalysts are presented. Multiple tables containing data on crucial parameters for both electrocatalytic activity and stability are displayed in this review. Finally, constructing M-Nx moieties is proposed as the most promising engineering strategy for stable N-C-based electrocatalysts.
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Affiliation(s)
- Sicong Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Zhengyuan Teng
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Chengyin Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Guoxiu Wang
- Center for Clean Energy Technology, Faculty of Science, University of Technology Sydney, Broadway, Sydney, NSW, 2007, Australia
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Sato S, Hatano K, Tsushima M, Nakamura H. 1-Methyl-4-aryl-urazole (MAUra) labels tyrosine in proximity to ruthenium photocatalysts. Chem Commun (Camb) 2018; 54:5871-5874. [DOI: 10.1039/c8cc02891e] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The 1-methyl-4-aryl-urazole (MAUra) structure was found to be a novel tyrosyl radical trapping agent to label tyrosine residues effectively in proximity to ruthenium photocatalysts.
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Affiliation(s)
- Shinichi Sato
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Yokohama
- Japan
| | - Kensuke Hatano
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Yokohama
- Japan
| | - Michihiko Tsushima
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Yokohama
- Japan
| | - Hiroyuki Nakamura
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Yokohama
- Japan
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Tan M, Rong Y, Su Q, Chen Y. Artesunate induces apoptosis via inhibition of STAT3 in THP-1 cells. Leuk Res 2017; 62:98-103. [PMID: 29031126 DOI: 10.1016/j.leukres.2017.09.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/26/2017] [Accepted: 09/29/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Our objective was to explore STAT3 expression in patients with acute myeloid leukaemia (AML), assess the anti-proliferative effects of artesunate (ART) on THP-1 cells in vivo and in vitro, and investigate the underlying mechanisms. METHODS In this study, we examined 30 patients with acute myeloid leukaemia diagnosed in our hospital from January 2015 to January 2016. The 20 control group patients had non-haematological diseases and were hospitalized for the same period. We extracted 2ml bone marrow, separated the mononuclear cells, obtained total proteins, and detected STAT3 protein levels with Western blot analyses. The THP-1 cells were treated with different concentrations of ART(0, 10, 25, 50, 100, 200μM). Then, THP-1 cell viability was detected with CCK-8 assays, apoptosis was measured with flow cytometry, and the STAT3, caspase-3 and caspase-8 protein levels were assessed using Western blot analyses. THP-1 cells in logarithmic growth phase were subcutaneously injected into the necks of 5-week-old nude mice. The control group was subcutaneously injected with 0.1ml PBS. After the nude mouse tumours grew, the mice were divided into the control group and drug intervention groups (ART 100μM group, ART 200μM group). The mice in the intervention groups were intraperitoneally injected with ART, and the control group was injected with the same amount of normal saline. Then, changes in the tumours were observed. After the drug intervention, the total protein was extracted, and STAT3 expression was detected by Western blot analysis. RESULTS Compared with the control group, the AML patients had significantly increased STAT3 protein levels (P<0.01). ART significantly inhibited the proliferation of THP-1 cells in a dose-dependent and time-dependent manner. ART also increased THP-1cell apoptosis. After treatment with ART, STAT3 protein was significantly down-regulated, and apoptosis of the cells was induced by the activation of caspase-3 and caspse-8. CONCLUSION AML patients had higher expression of STAT3 than that of the controls. ART induced apoptosis in THP-1 cells and inhibited the growth of xenografts in nude mice, and we also observed that ART down-regulated the expression of STAT3 and activated the caspase-3 and caspase-8. We speculated that the effect of ART on THP-1 cells may be related to inhibition of STAT3 and activation of caspase3 and caspase-8.
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Affiliation(s)
- Mei Tan
- Department of Pediatrics, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou, China
| | - Ying Rong
- Department of Pediatrics, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou, China
| | - Qiong Su
- Department of Pediatrics, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou, China
| | - Yan Chen
- Department of Pediatrics, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou, China.
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Ohata J, Ball ZT. A Hexa-rhodium Metallopeptide Catalyst for Site-Specific Functionalization of Natural Antibodies. J Am Chem Soc 2017; 139:12617-12622. [DOI: 10.1021/jacs.7b06428] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun Ohata
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Zachary T. Ball
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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Martin SC, Vohidov F, Wang H, Knudsen SE, Marzec AA, Ball ZT. Designing Selectivity in Dirhodium Metallopeptide Catalysts for Protein Modification. Bioconjug Chem 2017; 28:659-665. [DOI: 10.1021/acs.bioconjchem.6b00716] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samuel C. Martin
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Farrukh Vohidov
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Haopei Wang
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Sarah E. Knudsen
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Alex A. Marzec
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Zachary T. Ball
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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27
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Bharadwaj U, Kasembeli MM, Tweardy DJ. STAT3 Inhibitors in Cancer: A Comprehensive Update. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/978-3-319-42949-6_5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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28
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Abstract
The transcription factor signal transducer and activator of transcription 3 (STAT3) is perhaps best known for its prosurvival effects in a wide variety of cancers, but for some, including acute myeloid leukemia (AML), its role in immune evasion may be just as important. In this issue of Blood, Zhang et al report the development of an engineered STAT3 decoy oligodeoxynucleotide (dODN) that is stable in serum, is taken up specifically by target cells, and exerts its antileukemia effects largely by restoring the host anti-AML immune response.
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Ohata J, Minus MB, Abernathy ME, Ball ZT. Histidine-Directed Arylation/Alkenylation of Backbone N–H Bonds Mediated by Copper(II). J Am Chem Soc 2016; 138:7472-5. [DOI: 10.1021/jacs.6b03390] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jun Ohata
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Matthew B. Minus
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Morgan E. Abernathy
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Zachary T. Ball
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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