1
|
Koehn EM, Lang A, Flores A, Lambert C, Klinman J. Replacement of Tyrosines by Unnatural Amino Acid Aminophenylalanine Leads to Metal-Mediated Aniline Free Radical Formation in a Copper Amine Oxidase. ACS Chem Biol 2024; 19:1525-1532. [PMID: 38889186 PMCID: PMC11407504 DOI: 10.1021/acschembio.4c00198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Copper amine oxidases (CAOs) catalyze the oxidative deamination of primary amines to aldehyde, ammonia, and hydrogen peroxide as products and are widely distributed in bacteria, plants, and eukaryotes. These enzymes initiate the single turnover, post-translational conversion of an active site tyrosine to the redox cofactor 2,4,5-trihydroxyphenylalanine quinone (TPQ), subsequently employing TPQ to catalyze steady-state amine oxidation. The mechanisms of TPQ biogenesis and steady-state amine oxidation have been studied extensively, with consensus mechanisms proposed for both reactions. One unresolved issue has been whether the Cu2+ center must undergo formal reduction to Cu1+ in the course of the reaction. Herein, we investigate the properties of the active site of a yeast (Hansenula polymorpha) amine oxidase (HPAO) that has undergone site-specific insertion of a para-aminophenylalanine (pAF) into the position of either the precursor tyrosine to TPQ (Y405) or the two strictly conserved neighboring tyrosines (Y305 and Y407). While our original intention was to interrogate cofactor biogenesis using a precursor unnatural amino acid (UAA) of altered redox potential and pKa, we instead observe an unanticipated reaction assigned to an intramolecular electron transfer from pAF to the active site copper ion. We establish the generality of the observed active site chemistry using exogenously added, aniline-containing substrates under conditions that prevent side chain amine oxidation. The results support previous proposals that the activation of the TPQ precursor occurs in the absence of a formal valence change at the active site copper site. The described reaction of pAFs with the active site redox Cu2+ center of HPAO provides a prototype for either the engineering of the enzymatic oxidation of exogenous anilines or the insertion of site-specific free radical probes within proteins.
Collapse
Affiliation(s)
- Eric M Koehn
- Department of Chemistry and California Institute for Quantitative Biosciences, University of California-Berkeley, Berkeley, California 94720-3220, United States
| | - Albert Lang
- Department of Molecular and Cell Biology, University of California-Berkeley, Berkeley, California 94720-3220, United States
| | - Allison Flores
- Department of Chemistry and California Institute for Quantitative Biosciences, University of California-Berkeley, Berkeley, California 94720-3220, United States
| | - Claudia Lambert
- Department of Chemistry and California Institute for Quantitative Biosciences, University of California-Berkeley, Berkeley, California 94720-3220, United States
| | - Judith Klinman
- Department of Chemistry and California Institute for Quantitative Biosciences, University of California-Berkeley, Berkeley, California 94720-3220, United States
- Department of Molecular and Cell Biology, University of California-Berkeley, Berkeley, California 94720-3220, United States
| |
Collapse
|
2
|
Pöstges T, Galster F, Kampschulze J, Hanekamp W, Lehr M. ω-(5-Phenyl-2H-tetrazol-2-yl)alkyl-substituted glycine amides and related compounds as inhibitors of the amine oxidase vascular adhesion protein-1 (VAP-1). Bioorg Med Chem 2024; 98:117558. [PMID: 38142562 DOI: 10.1016/j.bmc.2023.117558] [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: 08/09/2023] [Revised: 11/20/2023] [Accepted: 12/11/2023] [Indexed: 12/26/2023]
Abstract
Vascular adhesion protein-1 (VAP-1), also known as plasma amine oxidase or semicarbazide-sensitive amine oxidase, is an enzyme that degrades primary amines to aldehydes with the formation of hydrogen peroxide and ammonia. Among others, it plays a role in inflammatory processes as it can mediate the migration of leukocytes from the blood to the inflamed tissue. We prepared a series of ω-(5-phenyl-2H-tetrazol-2-yl)alkyl-substituted glycine amides and related compounds and tested them for inhibition of purified bovine plasma VAP-1. Compounds with submicromolar activity were obtained. Studies on the mechanism of action revealed that the glycine amides are substrate inhibitors, i.e., they are also converted to an aldehyde derivative. However, the reaction proceeds much more slowly than that of the substrate used in the assay, whose conversion is thus blocked. Examination of the selectivity of the synthesized glycine amides with respect to other amine oxidases showed that they inhibited diamine oxidase, which is structurally related to VAP-1, but only to a much lesser extent. In contrast, the activity of monoamine oxidase A and B was not affected. Selected compounds also inhibited VAP-1 in human plasma. The IC50 values measured were higher than those determined with the bovine enzyme. However, the structure-activity relationships obtained with the glycine amides were similar for both enzymes.
Collapse
Affiliation(s)
- Timo Pöstges
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149 Münster, Germany
| | - Florian Galster
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149 Münster, Germany
| | - Jan Kampschulze
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149 Münster, Germany
| | - Walburga Hanekamp
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149 Münster, Germany
| | - Matthias Lehr
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149 Münster, Germany.
| |
Collapse
|
3
|
Karpenko MN, Muruzheva ZM, Ilyechova EY, Babich PS, Puchkova LV. Abnormalities in Copper Status Associated with an Elevated Risk of Parkinson's Phenotype Development. Antioxidants (Basel) 2023; 12:1654. [PMID: 37759957 PMCID: PMC10525645 DOI: 10.3390/antiox12091654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/10/2023] [Accepted: 08/16/2023] [Indexed: 09/29/2023] Open
Abstract
In the last 15 years, among the many reasons given for the development of idiopathic forms of Parkinson's disease (PD), copper imbalance has been identified as a factor, and PD is often referred to as a copper-mediated disorder. More than 640 papers have been devoted to the relationship between PD and copper status in the blood, which include the following markers: total copper concentration, enzymatic ceruloplasmin (Cp) concentration, Cp protein level, and non-ceruloplasmin copper level. Most studies measure only one of these markers. Therefore, the existence of a correlation between copper status and the development of PD is still debated. Based on data from the published literature, meta-analysis, and our own research, it is clear that there is a connection between the development of PD symptoms and the number of copper atoms, which are weakly associated with the ceruloplasmin molecule. In this work, the link between the risk of developing PD and various inborn errors related to copper metabolism, leading to decreased levels of oxidase ceruloplasmin in the circulation and cerebrospinal fluid, is discussed.
Collapse
Affiliation(s)
- Marina N. Karpenko
- I.P. Pavlov Department of Physiology, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia; (M.N.K.); (Z.M.M.)
- Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
| | - Zamira M. Muruzheva
- I.P. Pavlov Department of Physiology, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia; (M.N.K.); (Z.M.M.)
- State Budgetary Institution of Health Care “Leningrad Regional Clinical Hospital”, 194291 St. Petersburg, Russia
| | - Ekaterina Yu. Ilyechova
- Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
- Research Center of Advanced Functional Materials and Laser Communication Systems, ADTS Institute, ITMO University, 197101 St. Petersburg, Russia
- Department of Molecular Genetics, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia
| | - Polina S. Babich
- Department of Zoology and Genetics, Faculty of Biology, Herzen State Pedagogical University of Russia, 191186 St. Petersburg, Russia;
| | - Ludmila V. Puchkova
- Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
- Research Center of Advanced Functional Materials and Laser Communication Systems, ADTS Institute, ITMO University, 197101 St. Petersburg, Russia
- Department of Molecular Genetics, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia
| |
Collapse
|
4
|
Karam HM, Galal SM, Lotfy DM. Nrf2 and NF-қB interplay in tamoxifen-induced hepatic toxicity: A promising therapeutic approach of sildenafil and low-dose γ radiation. ENVIRONMENTAL TOXICOLOGY 2023; 38:990-996. [PMID: 36715126 DOI: 10.1002/tox.23742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 12/13/2022] [Accepted: 01/07/2023] [Indexed: 06/18/2023]
Abstract
Tamoxifen-induced hepatotoxicity is an inevitable side effect during breast cancer treatment. Low-dose gamma irradiation (IRR) shows many beneficial effects by stimulating various biological processes. This study evaluates the possible effect of sildenafil and low-dose gamma radiation on liver damages as new treatment strategies. Group I (control), group II: (tamoxifen), group III: (tamoxifen + Sildenafil), group IV: (tamoxifen+ irradiation) and group V: (tamoxifen +Sildenafil + irradiation). Rats were sacrificed after 5 h from tamoxifen injection. Results showed that tamoxifen caused elevation in serum AST, ALT and ALP as well hepatic ROS, iNOS, MDA, Keap-1 and NF-Kb, in addition to diminution in hepatic Nrf2 and HO-1. Exposure to low-dose gamma radiation and sildenafil amended the alterations in the measured parameters in serum and tissue. Moreover, all results were confirmed by histopathological examination. In conclusion, sildenafil and low-dose gamma radiation can mitigate the toxicity induced by tamoxifen in liver tissues. Hence, this treatment could be further evaluated as a new approach for alleviating various liver disorders.
Collapse
Affiliation(s)
- Heba M Karam
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Shereen M Galal
- Health Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Dina M Lotfy
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| |
Collapse
|
5
|
SOX15 transcriptionally increases the function of AOC1 to modulate ferroptosis and progression in prostate cancer. Cell Death Dis 2022; 13:673. [PMID: 35922412 PMCID: PMC9349193 DOI: 10.1038/s41419-022-05108-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 07/13/2022] [Accepted: 07/15/2022] [Indexed: 01/21/2023]
Abstract
Amine oxidase copper-containing 1 (AOC1) is considered an oncogene in many types of tumors. Nevertheless, there have been no investigations of AOC1 and its regulatory mechanism in prostate cancer. Here, we reveal a novel action of AOC1 and a tumor suppressor mechanism in prostate cancer. AOC1 is downregulated in prostate cancer. Abatement of AOC1 in prostate cancer tissue is positively correlated with the tumor size, lymph node metastasis, and Gleason score for prostate cancer. Conversely, high expression of AOC1 is significantly associated with reduced proliferation and migration in prostate cancer both in vitro and in vivo. We show that the anticancer effect of AOC1 is mediated by its action on spermidine which leads to the activation of reactive oxygen species and ferroptosis. AOC1 expression in prostate cancer is positively regulated by the transcription factor SOX15. Therefore, SOX15 can transcriptionally promote AOC1 expression and strengthen this effect. Targeting AOC1 and SOX15 may be promising for the treatment of prostate cancer.
Collapse
|
6
|
Delineating biosynthesis of Huperzine A, A plant-derived medicine for the treatment of Alzheimer's disease. Biotechnol Adv 2022; 60:108026. [DOI: 10.1016/j.biotechadv.2022.108026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 07/01/2022] [Accepted: 07/26/2022] [Indexed: 11/22/2022]
|
7
|
Ding Y, Ma L, He L, Xu Q, Zhang Z, Zhang Z, Zhang X, Fan R, Ma W, Sun Y, Zhang B, Li W, Zhai Y, Zhang J. A strategy for attenuation of acute radiation-induced lung injury using crocetin from gardenia fruit. Biomed Pharmacother 2022; 149:112899. [PMID: 35366531 DOI: 10.1016/j.biopha.2022.112899] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/18/2022] [Accepted: 03/25/2022] [Indexed: 11/29/2022] Open
Abstract
PURPOSE Radiation-induced lung injury limits the implementation of radiotherapy plans and severely impairs the quality of life. Crocetin has the capability to protect against radiation. This study is aimed at estimate the preventive effect and mechanism of crocetin on acute radiation induced lung injury. METHODS AND MATERIALS In this study, we offer a strategy for radiation-induced lung injury by using crocetin, an extract of gardenia fruit. Histopathology, transcriptomics, flow cytometry, and other methods have served to examine the effect and mechanism of crocetin on acute radiation-induced lung injury. RESULTS Crocetin effectively alleviates radiation-induced alveolar wall thickening and alveolar destruction. The number of normal alveoli and lung structure of mice is well protected by the prevention of crocetin. It is found that crocetin inhibits necroptosis to achieve effective radioprotection by down regulating the Tnfrsf10b gene in vitro. CONCLUSION Crocetin inhibits necroptosis through transcriptional regulation of the Tnfrsf10b gene, thereby preventing radiation-induced lung injury. This work may provide a new strategy for the prevention of lung radiation injury by the extract from Chinese herbal medicine.
Collapse
Affiliation(s)
- Yan Ding
- Department of Radiation Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Lei Ma
- Cancer Center, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Limin He
- Cancer Center, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Quanxiao Xu
- Cancer Center, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Zhuang Zhang
- Department of Clinical Medicine, Xinjiang Medical University, Urumqi 830000, China
| | - Zhen Zhang
- Second Ward, Department of Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Xinping Zhang
- Department of Obstetrics and Gynecology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Rui Fan
- Department of Pathology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Wenjun Ma
- Department of Radiation Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Ya'nan Sun
- Department of Radiation Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Baile Zhang
- Department of Radiation Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Wentai Li
- Department of Radiation Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Yao Zhai
- Department of Radiation Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China
| | - Jiandong Zhang
- Department of Radiation Oncology, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473000, China.
| |
Collapse
|
8
|
Zhang F, Liang J, Feng D, Liu S, Wu J, Tang Y, Liu Z, Lu Y, Wang X, Wei X. Integrated Analysis of Energy Metabolism Signature-Identified Distinct Subtypes of Bladder Urothelial Carcinoma. Front Cell Dev Biol 2022; 10:814735. [PMID: 35281080 PMCID: PMC8905247 DOI: 10.3389/fcell.2022.814735] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 02/03/2022] [Indexed: 01/08/2023] Open
Abstract
Background: Bladder urothelial carcinoma (BLCA) is the most common type of bladder cancer. In this study, the correlation between the metabolic status and the outcome of patients with BLCA was evaluated using data from the Cancer Genome Atlas and Gene Expression Omnibus datasets. Methods: The clinical and transcriptomic data of patients with BLCA were downloaded from the Cancer Genome Atlas and cBioPortal datasets, and energy metabolism-related gene sets were obtained from the Molecular Signature Database. A consensus clustering algorithm was then conducted to classify the patients into two clusters. Tumor prognosis, clinicopathological features, mutations, functional analysis, ferroptosis status analysis, immune infiltration, immune checkpoint-related gene expression level, chemotherapy resistance, and tumor stem cells were analyzed between clusters. An energy metabolism-related signature was further developed and verified using data from cBioPortal datasets. Results: Two clusters (C1 and C2) were identified using a consensus clustering algorithm based on an energy metabolism-related signature. The patients with subtype C1 had more metabolism-related pathways, different ferroptosis status, higher cancer stem cell scores, higher chemotherapy resistance, and better prognosis. Subtype C2 was characterized by an increased number of advanced BLCA cases and immune-related pathways. Higher immune and stromal scores were also observed for the C2 subtype. A signature containing 16 energy metabolism-related genes was then identified, which can accurately predict the prognosis of patients with BLCA. Conclusion: We found that the energy metabolism-associated subtypes of BLCA are closely related to the immune microenvironment, immune checkpoint-related gene expression, ferroptosis status, CSCs, chemotherapy resistance, prognosis, and progression of BLCA patients. The established energy metabolism-related gene signature was able to predict survival in patients with BLCA.
Collapse
Affiliation(s)
- Fan Zhang
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Jiayu Liang
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Dechao Feng
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Shengzhuo Liu
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Jiapei Wu
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Yongquan Tang
- Department of Pediatric Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Zhihong Liu
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Yiping Lu
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Xianding Wang
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Xianding Wang, ; Xin Wei,
| | - Xin Wei
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Xianding Wang, ; Xin Wei,
| |
Collapse
|
9
|
High doses of tyramine stimulate glucose transport in human fat cells. J Physiol Biochem 2022; 78:543-556. [DOI: 10.1007/s13105-021-00864-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 12/09/2021] [Indexed: 01/13/2023]
|
10
|
Chang CY, Wu KL, Chang YY, Tsai PH, Hung JY, Chang WA, Jian SF, Huang YC, Chong IW, Tsai YM, Hsu YL. Amine oxidase, copper containing 3 exerts anti‑mesenchymal transformation and enhances CD4 + T‑cell recruitment to prolong survival in lung cancer. Oncol Rep 2021; 46:203. [PMID: 34318901 PMCID: PMC8329917 DOI: 10.3892/or.2021.8154] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 06/15/2021] [Indexed: 11/05/2022] Open
Abstract
Lung cancer remains notorious for its poor prognosis. Despite the advent of tyrosine kinase inhibitors and immune checkpoint inhibitors, the probability of curing the disease in lung cancer patients remains low. Novel mechanisms and treatment strategies are needed to provide hope to patients. Advanced strategies of next generation sequencing (NGS) and bioinformatics were used to analyze normal and lung cancer tissues from lung cancer patients. Amine oxidases have been linked to leukocyte migration and tumorigenesis. However, the roles of amine oxidases in lung cancer are not well-understood. Our results indicated that amine oxidase, copper containing 3 (AOC3) was significantly decreased in the tumor tissue compared with the normal tissue, at both the mRNA and protein level, in the included lung cancer patients and public databases. Lower expression of AOC3 conferred a poorer survival probability across the different cohorts. Epigenetic silencing of AOC3 via miR-3691-5p caused tumor promotion and progression by increasing migration and epithelial-mesenchymal transition (EMT). Furthermore, knockdown of AOC3 caused less CD4+ T-cell attachment onto lung cancer cells and reduced transendothelial migration in vitro, as well as reducing CD4+ T-cell trafficking to the lung in vivo. In conclusion, the present study revealed that downregulation of AOC3 mediated lung cancer promotion and progression, as well as decrease of immune cell recruitment. This novel finding could expand our understanding of the dysregulation of the tumor immune microenvironment and could help to develop a novel strategy for the treatment of lung cancer.
Collapse
Affiliation(s)
- Chao-Yuan Chang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Kuan-Li Wu
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Yung-Yun Chang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Pei-Hsun Tsai
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Jen-Yu Hung
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Wei-An Chang
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Shu-Fang Jian
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Yung-Chi Huang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Inn-Wen Chong
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Ying-Ming Tsai
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Ya-Ling Hsu
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| |
Collapse
|
11
|
Liu F, Ou W, Tang W, Huang Z, Zhu Z, Ding W, Fu J, Zhu Y, Liu C, Xu W, Du P. Increased AOC1 Expression Promotes Cancer Progression in Colorectal Cancer. Front Oncol 2021; 11:657210. [PMID: 34026633 PMCID: PMC8131869 DOI: 10.3389/fonc.2021.657210] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/12/2021] [Indexed: 12/09/2022] Open
Abstract
Background Amine oxidase copper containing 1 (AOC1) is a gene whose biological function in colorectal cancer (CRC) has not been elucidated. Therefore, the purpose of this study was to investigate the clinical significance of AOC1 expression in CRC and its biological function in CRC cell lines. Materials and Methods AOC1 expression levels were examined in paired CRC and peritumoral tissues, and distant liver metastatic tissues were examined using quantitative real-time PCR, western blotting, and immunohistochemistry staining. The log-rank test and Cox regression model were used to analyze the relationship between AOC1 expression and prognosis. Proliferation assays (Cell Counting Kit‐8 and colony formation assays), migration assays (Transwell and wound healing assays) and xenograft tumor formation in nude mice were performed to assess the biological role of AOC1 in CRC cells. Results AOC1 expression significantly increased in human CRC tissues, especially in liver metastases, and was associated with a worse prognosis. In addition, AOC1 had higher expression in tumor organoids than in normal organoids, suggesting that it was highly expressed in the tumor epithelium. Functional analysis demonstrated that AOC1 knockdown inhibited the proliferation and migration of CRC cells by inducing EMT in vitro. Xenograft tumor formation in nude mice showed that knockdown of AOC1 inhibited the tumor xenografts growth in vivo. Conclusion High expression of AOC1 was significantly associated with worse clinical outcomes, was an independent risk factor for poor prognosis, and promoted aggressive CRC cell phenotypes. AOC1 is expected to become a novel biomarker for predicting the prognosis of patients with CRC and an effective therapeutic target in clinical practice.
Collapse
Affiliation(s)
- Fangyuan Liu
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Weijun Ou
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Wenbo Tang
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Zhenyu Huang
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Zhehui Zhu
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Wenjun Ding
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jihong Fu
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yilian Zhu
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Chenying Liu
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Weimin Xu
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Peng Du
- Department of Colorectal Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| |
Collapse
|
12
|
Szabó Z, Péter M, Héja L, Kardos J. Dual Role for Astroglial Copper-Assisted Polyamine Metabolism during Intense Network Activity. Biomolecules 2021; 11:604. [PMID: 33921742 PMCID: PMC8073386 DOI: 10.3390/biom11040604] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/09/2021] [Accepted: 04/14/2021] [Indexed: 12/29/2022] Open
Abstract
Astrocytes serve essential roles in human brain function and diseases. Growing evidence indicates that astrocytes are central players of the feedback modulation of excitatory Glu signalling during epileptiform activity via Glu-GABA exchange. The underlying mechanism results in the increase of tonic inhibition by reverse operation of the astroglial GABA transporter, induced by Glu-Na+ symport. GABA, released from astrocytes, is synthesized from the polyamine (PA) putrescine and this process involves copper amino oxidase. Through this pathway, putrescine can be considered as an important source of inhibitory signaling that counterbalances epileptic discharges. Putrescine, however, is also a precursor for spermine that is known to enhance gap junction channel communication and, consequently, supports long-range Ca2+ signaling and contributes to spreading of excitatory activity through the astrocytic syncytium. Recently, we presented the possibility of neuron-glia redox coupling through copper (Cu+/Cu2+) signaling and oxidative putrescine catabolism. In the current work, we explore whether the Cu+/Cu2+ homeostasis is involved in astrocytic control on neuronal excitability by regulating PA catabolism. We provide supporting experimental data underlying this hypothesis. We show that the blockade of copper transporter (CTR1) by AgNO3 (3.6 µM) prevents GABA transporter-mediated tonic inhibitory currents, indicating causal relationship between copper (Cu+/Cu2+) uptake and the catabolism of putrescine to GABA in astrocytes. In addition, we show that MnCl2 (20 μM), an inhibitor of the divalent metal transporter DMT1, also prevents the astrocytic Glu-GABA exchange. Furthermore, we observed that facilitation of copper uptake by added CuCl2 (2 µM) boosts tonic inhibitory currents. These findings corroborate the hypothesis that modulation of neuron-glia coupling by copper uptake drives putrescine → GABA transformation, which leads to subsequent Glu-GABA exchange and tonic inhibition. Findings may in turn highlight the potential role of copper signaling in fine-tuning the activity of the tripartite synapse.
Collapse
Affiliation(s)
- Zsolt Szabó
- Functional Pharmacology Research Group, Research Centre for Natural Sciences, Institute of Organic Chemistry, H-1117 Budapest, Hungary; (Z.S.); (M.P.); (J.K.)
| | - Márton Péter
- Functional Pharmacology Research Group, Research Centre for Natural Sciences, Institute of Organic Chemistry, H-1117 Budapest, Hungary; (Z.S.); (M.P.); (J.K.)
- Hevesy György Ph.D. School of Chemistry, ELTE Eötvös Loránd University, H-1117 Budapest, Hungary
| | - László Héja
- Functional Pharmacology Research Group, Research Centre for Natural Sciences, Institute of Organic Chemistry, H-1117 Budapest, Hungary; (Z.S.); (M.P.); (J.K.)
| | - Julianna Kardos
- Functional Pharmacology Research Group, Research Centre for Natural Sciences, Institute of Organic Chemistry, H-1117 Budapest, Hungary; (Z.S.); (M.P.); (J.K.)
| |
Collapse
|
13
|
Shafee T, Bacic A, Johnson K. Evolution of Sequence-Diverse Disordered Regions in a Protein Family: Order within the Chaos. Mol Biol Evol 2020; 37:2155-2172. [DOI: 10.1093/molbev/msaa096] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Abstract
Approaches for studying the evolution of globular proteins are now well established yet are unsuitable for disordered sequences. Our understanding of the evolution of proteins containing disordered regions therefore lags that of globular proteins, limiting our capacity to estimate their evolutionary history, classify paralogs, and identify potential sequence–function relationships. Here, we overcome these limitations by using new analytical approaches that project representations of sequence space to dissect the evolution of proteins with both ordered and disordered regions, and the correlated changes between these. We use the fasciclin-like arabinogalactan proteins (FLAs) as a model family, since they contain a variable number of globular fasciclin domains as well as several distinct types of disordered regions: proline (Pro)-rich arabinogalactan (AG) regions and longer Pro-depleted regions.
Sequence space projections of fasciclin domains from 2019 FLAs from 78 species identified distinct clusters corresponding to different types of fasciclin domains. Clusters can be similarly identified in the seemingly random Pro-rich AG and Pro-depleted disordered regions. Sequence features of the globular and disordered regions clearly correlate with one another, implying coevolution of these distinct regions, as well as with the N-linked and O-linked glycosylation motifs. We reconstruct the overall evolutionary history of the FLAs, annotated with the changing domain architectures, glycosylation motifs, number and length of AG regions, and disordered region sequence features. Mapping these features onto the functionally characterized FLAs therefore enables their sequence–function relationships to be interrogated. These findings will inform research on the abundant disordered regions in protein families from all kingdoms of life.
Collapse
Affiliation(s)
- Thomas Shafee
- Department of Animal, Plant and Soil Sciences, La Trobe Institute for Agriculture & Food, La Trobe University, Melbourne, VIC, Australia
| | - Antony Bacic
- Department of Animal, Plant and Soil Sciences, La Trobe Institute for Agriculture & Food, La Trobe University, Melbourne, VIC, Australia
- Sino-Australia Plant Cell Wall Research Centre, College of Forestry and Biotechnology, Zhejiang Agriculture and Forestry University, Lin’an, Hangzhou, China
| | - Kim Johnson
- Department of Animal, Plant and Soil Sciences, La Trobe Institute for Agriculture & Food, La Trobe University, Melbourne, VIC, Australia
- Sino-Australia Plant Cell Wall Research Centre, College of Forestry and Biotechnology, Zhejiang Agriculture and Forestry University, Lin’an, Hangzhou, China
| |
Collapse
|
14
|
Methylxanthines Inhibit Primary Amine Oxidase and Monoamine Oxidase Activities of Human Adipose Tissue. MEDICINES 2020; 7:medicines7040018. [PMID: 32252407 PMCID: PMC7235778 DOI: 10.3390/medicines7040018] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/26/2020] [Accepted: 03/28/2020] [Indexed: 12/13/2022]
Abstract
Background: Methylxanthines including caffeine and theobromine are widely consumed compounds and were recently shown to interact with bovine copper-containing amine oxidase. To the best of our knowledge, no direct demonstration of any interplay between these phytochemicals and human primary amine oxidase (PrAO) has been reported to date. We took advantage of the coexistence of PrAO and monoamine oxidase (MAO) activities in human subcutaneous adipose tissue (hScAT) to test the interaction between several methylxanthines and these enzymes, which are involved in many key pathophysiological processes. Methods: Benzylamine, methylamine, and tyramine were used as substrates for PrAO and MAO in homogenates of subcutaneous adipose depots obtained from overweight women undergoing plastic surgery. Methylxanthines were tested as substrates or inhibitors by fluorimetric determination of hydrogen peroxide, an end-product of amine oxidation. Results: Semicarbazide-sensitive PrAO activity was inhibited by theobromine, caffeine, and isobutylmethylxanthine (IBMX) while theophylline, paraxanthine, and 7-methylxanthine had little effect. Theobromine inhibited PrAO activity by 54% at 2.5 mM. Overall, the relationship between methylxanthine structure and the degree of inhibition was similar to that seen with bovine PrAO, although higher concentrations (mM) were required for inhibition. Theobromine also inhibited oxidation of tyramine by MAO, at the limits of its solubility in a DMSO vehicle. At doses higher than 12 % v/v, DMSO impaired MAO activity. MAO was also inhibited by millimolar doses of IBMX, caffeine and by other methylxanthines to a lesser extent. Conclusions: This preclinical study extrapolates previous findings with bovine PrAO to human tissues. Given that PrAO is a potential target for anti-inflammatory drugs, it indicates that alongside phosphodiesterase inhibition and adenosine receptor antagonism, PrAO and MAO inhibition could contribute to the health benefits of methylxanthines, especially their anti-inflammatory effects.
Collapse
|
15
|
Vakal S, Jalkanen S, Dahlström KM, Salminen TA. Human Copper-Containing Amine Oxidases in Drug Design and Development. Molecules 2020; 25:E1293. [PMID: 32178384 PMCID: PMC7144023 DOI: 10.3390/molecules25061293] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/06/2020] [Accepted: 03/10/2020] [Indexed: 12/28/2022] Open
Abstract
Two members of the copper-containing amine oxidase family are physiologically important proteins: (1) Diamine oxidase (hDAO; AOC1) with a preference for diamines is involved in degradation of histamine and (2) Vascular adhesion protein-1 (hVAP-1; AOC3) with a preference for monoamines is a multifunctional cell-surface receptor and an enzyme. hVAP-1-targeted inhibitors are designed to treat inflammatory diseases and cancer, whereas the off-target binding of the designed inhibitors to hDAO might result in adverse drug reactions. The X-ray structures for both human enzymes are solved and provide the basis for computer-aided inhibitor design, which has been reported by several research groups. Although the putative off-target effect of hDAO is less studied, computational methods could be easily utilized to avoid the binding of VAP-1-targeted inhibitors to hDAO. The choice of the model organism for preclinical testing of hVAP-1 inhibitors is not either trivial due to species-specific binding properties of designed inhibitors and different repertoire of copper-containing amine oxidase family members in mammalian species. Thus, the facts that should be considered in hVAP-1-targeted inhibitor design are discussed in light of the applied structural bioinformatics and structural biology approaches.
Collapse
Affiliation(s)
- Serhii Vakal
- Structural Bioinformatics Laboratory, Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6A, FI-20520 Turku, Finland; (S.V.); (K.M.D.)
| | - Sirpa Jalkanen
- MediCity Research Laboratory, University of Turku, Tykistökatu 6A, FI-20520 Turku, Finland;
| | - Käthe M. Dahlström
- Structural Bioinformatics Laboratory, Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6A, FI-20520 Turku, Finland; (S.V.); (K.M.D.)
| | - Tiina A. Salminen
- Structural Bioinformatics Laboratory, Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6A, FI-20520 Turku, Finland; (S.V.); (K.M.D.)
| |
Collapse
|