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Liu S, Zhang Q, Zhang X, Du C, Chen J, Si S. Real-time monitoring of dephosphorylation process of phosphopeptide and rapid assay of PTP1B activity based on a 100 MHz QCM biosensing platform. Talanta 2024; 277:126399. [PMID: 38876030 DOI: 10.1016/j.talanta.2024.126399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 06/06/2024] [Accepted: 06/08/2024] [Indexed: 06/16/2024]
Abstract
The misregulation of protein phosphatases is a key factor in the development of many human diseases, notably cancers. Here, based on a 100 MHz quartz crystal microbalance (QCM) biosensing platform, the dephosphorylation process of phosphopeptide (P-peptide) caused by protein tyrosine phosphatase 1B (PTP1B) was monitored in real time for the first time and PTP1B activity was assayed rapidly and sensitively. The QCM chip, coated with a gold (Au) film, was used to immobilized thiol-labeled single-stranded 5'-phosphate-DNAs (P-DNA) through Au-S bond. The P-peptide, specific to PTP1B, was then connected to the P-DNA via chelation between Zr4+ and phosphate groups. When PTP1B was injected into the QCM flow cell where the P-peptide/Zr4+/MCH/P-DNA/Au chip was placed, the P-peptide was dephosphorylated and released from the Au chip surface, resulting in an increase in the frequency of the QCM Au chip. This allowed the real-time monitoring of the P-peptide dephosphorylation process and sensitive detection of PTP1B activity within 6 min with a linear detection range of 0.01-100 pM and a detection limit of 0.008 pM. In addition, the maximum inhibitory ratios of inhibitors were evaluated using this proposed 100 MHz QCM biosensor. The developed 100 MHz QCM biosensing platform shows immense potential for early diagnosis of diseases related to protein phosphatases and the development of drugs targeting protein phosphatases.
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Affiliation(s)
- Shuping Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Qingqing Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China; School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, PR China.
| | - Xiaohua Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Cuicui Du
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Jinhua Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.
| | - Shihui Si
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China.
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Jiang W, Zhao ZY, Tong YP, Ma GL, Zang Y, Osman EEA, Jin ZX, Xiong J, Li J, Hu JF. Phytochemical and biological studies on rare and endangered plants endemic to China. Part XXV. Structurally diverse triterpenoids and diterpenoids from two endangered Pinaceae plants endemic to the Chinese Qinling Mountains and their bioactivities. PHYTOCHEMISTRY 2022; 203:113366. [PMID: 35970438 DOI: 10.1016/j.phytochem.2022.113366] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/30/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
A joint phytochemical investigation on the MeOH extracts of the twigs and needles of two endangered Pinaceae plants endemic to the Chinese Qinling Mountains, Picea neoveitchii (an evergreen spruce) and Larix potaninii var. chinensis (a deciduous larch), led to the isolation and characterization of 34 and 24 structurally diverse terpenoids, respectively. Among them, seven are previously undescribed, including a picane-type [i.e., 14(13 → 12)abeo-12αH-serratane] (neoveitchin A) and a serratane-type (neoveitchin B) triterpenoids, and an abietane-type (neoveitchin C) as well as four labdane-type (potalarxins A-D) diterpenoids. Their structures and absolute configurations were established by extensive spectroscopic methods and/or X-ray diffraction analyses. All isolates were evaluated for their inhibitory activities against the human protein tyrosine phosphatase 1B (PTP1B). Serrat-14-en-3α,21β-diol, betulinic acid, 3β-hydroxy-11-ursen-13(28)-olide, ursolic acid, and oleanolic acid were found to have considerable inhibitory effects against PTP1B, with IC50 values ranging from 1.1 to 18.1 μM. The interactions of the bioactive triterpenoids with PTP1B were thereafter performed by employing molecular docking studies. In addition, 7-oxo-dehydroabietic acid (an abietane-type diterpenoid) and mangiferonic acid (a cycloartane-type triterpenoid) inhibited acetyl-coenzyme A carboxylase 1 (ACC1), with IC50 values of 3.4 and 6.6 μM, respectively.
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Affiliation(s)
- Wei Jiang
- Institute of Natural Medicine and Health Products, School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University, Zhejiang, 318000, PR China; School of Life Science and Technology, Wuhan Polytechnic University, Hubei, 430023, PR China; Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Ze-Yu Zhao
- Institute of Natural Medicine and Health Products, School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University, Zhejiang, 318000, PR China; Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Ying-Peng Tong
- Institute of Natural Medicine and Health Products, School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University, Zhejiang, 318000, PR China
| | - Guang-Lei Ma
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Yi Zang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, PR China
| | - Ezzat E A Osman
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China; Department of Biochemistry, Molecular Biology and Medicinal Chemistry, Theodor Bilharz Research Institute, P. O. Box 30 Imbaba, Giza, 12411, Egypt
| | - Ze-Xin Jin
- Institute of Natural Medicine and Health Products, School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University, Zhejiang, 318000, PR China
| | - Juan Xiong
- Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China.
| | - Jia Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, PR China
| | - Jin-Feng Hu
- Institute of Natural Medicine and Health Products, School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University, Zhejiang, 318000, PR China; Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai, 201203, PR China.
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3
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Sołtys A, Galanty A, Zagrodzki P, Grabowska K, Malarz J, Podolak I. Sorbus intermedia (EHRH.) PERS. fruits as a novel source of biologically active triterpenoids - Comparative studies of ursolic acid derivatives with cytotoxic potential. Biomed Pharmacother 2022; 154:113592. [PMID: 36027609 DOI: 10.1016/j.biopha.2022.113592] [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: 07/14/2022] [Revised: 08/18/2022] [Accepted: 08/18/2022] [Indexed: 11/02/2022] Open
Abstract
In the current study, the fruits of a popular ornamental tree, Sorbus intermedia, were investigated phytochemically and biologically as potential source of bioactive triterpenes. Six terpenoids were isolated and examined with respect to their cytotoxic activity using a broad screening in vitro model and multivariate analysis for better demonstration of the effects on cancer cells. This chemometric approach allowed us to confirm that the structural characteristics of the compounds significantly affected their impact on cell lines. Ursolic acid was found to be the most potent cytotoxic agent with IC50 predominantly < 10 μg/mL after 24 h of incubation. Its 3-acetoxy derivative was less active, however, an improvement in selectivity with regard to prostate panel was observed. Reduction of the carboxylic moiety at C28, as well as introduction of the hydroxyl group at 19α position led to complete loss of cytotoxic activity.
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Affiliation(s)
- Agnieszka Sołtys
- Department of Pharmacognosy, Faculty of Pharmacy Medical College, Jagiellonian University, Kraków, Poland.
| | - Agnieszka Galanty
- Department of Pharmacognosy, Faculty of Pharmacy Medical College, Jagiellonian University, Kraków, Poland.
| | - Paweł Zagrodzki
- Department of Food Chemistry and Nutrition, Faculty of Pharmacy Medical College, Jagiellonian University, Kraków, Poland.
| | - Karolina Grabowska
- Department of Pharmacognosy, Faculty of Pharmacy Medical College, Jagiellonian University, Kraków, Poland.
| | - Janusz Malarz
- Department of Phytochemistry, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Irma Podolak
- Department of Pharmacognosy, Faculty of Pharmacy Medical College, Jagiellonian University, Kraków, Poland.
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Ma JT, Li DW, Liu JK, He J. Advances in Research on Chemical Constituents and Their Biological Activities of the Genus Actinidia. NATURAL PRODUCTS AND BIOPROSPECTING 2021; 11:573-609. [PMID: 34595735 PMCID: PMC8599787 DOI: 10.1007/s13659-021-00319-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 09/15/2021] [Indexed: 05/03/2023]
Abstract
Kiwi, a fruit from plants of the genus Actinidia, is one of the famous fruits with thousand years of edible history. In the past twenty years, a great deal of research has been done on the chemical constituents of the Actinidia species. A large number of secondary metabolites including triterpenoids, flavonoids, phenols, etc. have been identified from differents parts of Actinidia plants, which exhibited significant in vitro and in vivo pharmacological activities including anticancer, anti-inflammatory, neuroprotective, anti-oxidative, anti-bacterial, and anti-diabetic activities. In order to fully understand the chemical components and biological activities of Actinidia plants, and to improve their further research, development and utilization, this review summarizes the compounds extracted from different parts of Actinidia plants since 1959 to 2020, classifies the types of constituents, reports on the pharmacological activities of relative compounds and medicinal potentials.
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Affiliation(s)
- Jin-Tao Ma
- School of Pharmaceutical Sciences, National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China
| | - Da-Wei Li
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China
| | - Juan He
- School of Pharmaceutical Sciences, National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China.
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Sołtys A, Galanty A, Zagrodzki P, Podolak I. Relationship between Maturity Stage, Triterpenoid Content and Cytotoxicity of Sorbus intermedia (EHRH.) PERS. Fruits - A Chemometric Approach. Chem Biodivers 2021; 18:e2100552. [PMID: 34669249 DOI: 10.1002/cbdv.202100552] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 09/16/2021] [Indexed: 12/17/2022]
Abstract
In this study, two ursane-type triterpenes, i. e., ursolic acid (UA) and 3-O-β-acetoxyursolic acid (AUA), were isolated and quantified in Sorbus intermedia (EHRH.) PERS. fruits. UA and AUA levels differed slightly throughout fruit maturation, and both triterpenes showed similar dynamics of accumulation with the highest levels found in ripe fruits (up to 6.33±0.56 and 1.17±0.18 mg/g dw. of UA and AUA, respectively). The extracts derived from unripe fruits displayed significant cytotoxic effects against WM793, DU-145, PC3, 8505C, Caco2 and A549 cells, but no correlation between UA and AUA levels and cytotoxicity was found. On the other hand, extracts from mature fruits were not active towards almost all of the tested cell lines. The chemometric approach showed that the extracts derived from fruits harvested earlier clustered to form a clearly distanced group from extracts prepared from more-mature fruits. The extracts at higher concentrations formed separate groups, which indicated the concentration-dependent effect of these extracts on the cells.
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Affiliation(s)
- Agnieszka Sołtys
- Department of Pharmacognosy, Faculty of Pharmacy Medical College, Jagiellonian University, Medyczna 9, 30-688, Kraków, Poland
| | - Agnieszka Galanty
- Department of Pharmacognosy, Faculty of Pharmacy Medical College, Jagiellonian University, Medyczna 9, 30-688, Kraków, Poland
| | - Paweł Zagrodzki
- Department of Food Chemistry and Nutrition, Faculty of Pharmacy Medical College, Jagiellonian University, Medyczna 9, 30-688, Kraków, Poland
| | - Irma Podolak
- Department of Pharmacognosy, Faculty of Pharmacy Medical College, Jagiellonian University, Medyczna 9, 30-688, Kraków, Poland
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Bruder M, Polo G, Trivella DBB. Natural allosteric modulators and their biological targets: molecular signatures and mechanisms. Nat Prod Rep 2020; 37:488-514. [PMID: 32048675 DOI: 10.1039/c9np00064j] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Covering: 2008 to 2018Over the last decade more than two hundred single natural products were confirmed as natural allosteric modulators (alloNPs) of proteins. The compounds are presented and discussed with the support of a chemical space, constructed using a principal component analysis (PCA) of molecular descriptors from chemical compounds of distinct databases. This analysis showed that alloNPs are dispersed throughout the majority of the chemical space defined by natural products in general. Moreover, a cluster of alloNPs was shown to occupy a region almost devoid of allosteric modulators retrieved from a dataset composed mainly of synthetic compounds, further highlighting the importance to explore the entire natural chemical space for probing allosteric mechanisms. The protein targets which alloNPs bind to comprised 81 different proteins, which were classified into 5 major groups, with enzymes, in particular hydrolases, being the main representative group. The review also brings a critical interpretation on the mechanisms by which alloNPs display their molecular action on proteins. In the latter analysis, alloNPs were classified according to their final effect on the target protein, resulting in 3 major categories: (i) local alteration of the orthosteric site; (ii) global alteration in protein dynamics that change function; and (iii) oligomer stabilisation or protein complex destabilisation via protein-protein interaction in sites distant from the orthosteric site. G-protein coupled receptors (GPCRs), which use a combination of the three types of allosteric regulation found, were also probed by natural products. In summary, the natural allosteric modulators reviewed herein emphasise their importance for exploring alternative chemotherapeutic strategies, potentially pushing the boundaries of the druggable space of pharmacologically relevant drug targets.
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Affiliation(s)
- Marjorie Bruder
- Brazilian Biosciences National Laboratory (LNBio), National Centre for Research in Energy and Materials (CNPEM), 13083-970 Campinas, SP, Brazil.
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Zhang XY, Li W, Wang J, Li N, Cheng MS, Koike K. Protein tyrosine phosphatase 1B inhibitory activities of ursane-type triterpenes from Chinese raspberry, fruits of Rubus chingii. Chin J Nat Med 2019; 17:15-21. [PMID: 30704618 DOI: 10.1016/s1875-5364(19)30004-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Indexed: 02/04/2023]
Abstract
Protein tyrosine phosphatase 1B (PTP1B) has led to an intense interest in developing its inhibitors as anti-diabetes, anti-obesity and anti-cancer agents. The fruits of Rubus chingii (Chinese raspberry) were used as a kind of dietary traditional Chinese medicine. The methanolic extract of R. chingii fruits exhibited significant PTP1B inhibitory activity. Further bioactivity-guided fractionation resulted in the isolation of three PTP1B inhibitory ursane-type triterpenes: ursolic acid (1), 2-oxopomolic acid (2), and 2α, 19α-dihydroxy-3-oxo-urs-12-en-28-oic acid (3). Kinetics analyses revealed that 1 was a non-competitive PTP1B inhibitor, and 2 and 3 were mixed type PTP1B inhibitors. Compounds 1-3 and structurally related triterpenes (4-8) were further analyzed the structure-activity relationship, and were evaluated the inhibitory selectivity against four homologous protein tyrosine phosphatases (TCPTP, VHR, SHP-1 and SHP-2). Molecular docking simulations were also carried out, and the result indicated that 1, 3-acetoxy-urs-12-ene-28-oic acid (5), and pomolic acid-3β-acetate (6) bound at the allosteric site including α3, α6, and α7 helix of PTP1B.
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Affiliation(s)
- Xiang-Yu Zhang
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China; School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Wei Li
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China; Faculty of Pharmaceutical Sciences, Toho University, Chiba 274-8510, Japan.
| | - Jian Wang
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China; School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Ning Li
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Mao-Sheng Cheng
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China; School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Kazuo Koike
- Faculty of Pharmaceutical Sciences, Toho University, Chiba 274-8510, Japan
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Lv J, Chen T, Yue X, Zhou J, Gong X, Zhang J. A colorimetric biosensor based on guanidinium recognition for the assay of protein tyrosine phosphatase 1B and its inhibitors. NEW J CHEM 2017. [DOI: 10.1039/c7nj02918g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A new colorimetric biosensor for the assay of PTP1B and its inhibitors based on coordination between RGC/AuNPs and MNPs/APP.
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Affiliation(s)
- Jun Lv
- Center for Molecular Recognition and Biosensing
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Tingjun Chen
- Center for Molecular Recognition and Biosensing
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Xiquan Yue
- Center for Molecular Recognition and Biosensing
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jianqiong Zhou
- Center for Molecular Recognition and Biosensing
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Xiuqing Gong
- Materials Genome Institute
- Shanghai University
- Shanghai 200444
- China
| | - Juan Zhang
- Center for Molecular Recognition and Biosensing
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- P. R. China
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Silva FSG, Oliveira PJ, Duarte MF. Oleanolic, Ursolic, and Betulinic Acids as Food Supplements or Pharmaceutical Agents for Type 2 Diabetes: Promise or Illusion? JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:2991-3008. [PMID: 27012451 DOI: 10.1021/acs.jafc.5b06021] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Oleanolic (OA), ursolic (UA), and betulinic (BA) acids are three triterpenic acids (TAs) with potential effects for treatment of type 2 diabetes (T2DM). Mechanistic studies showed that these TAs act as hypoglycemic and antiobesity agents mainly through (i) reducing the absorption of glucose; (ii) decreasing endogenous glucose production; (iii) increasing insulin sensitivity; (iv) improving lipid homeostasis; and (v) promoting body weight regulation. Besides these promising beneficial effects, it is believed that OA, UA, and BA protect against diabetes-related comorbidities due to their antiatherogenic, anti-inflammatory, and antioxidant properties. We also highlight the protective effect of OA, UA, and BA against oxidative damage, which may be very relevant for the treatment and/or prevention of T2DM. In the present review, we provide an integrative description of the antidiabetic properties of OA, UA, and BA, evaluating the potential use of these TAs as food supplements or pharmaceutical agents to prevent and/or treat T2DM.
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Affiliation(s)
- Filomena S G Silva
- Centro de Biotecnologia Agrı́cola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja) , Apartado 6158, 7801-908 Beja, Portugal
| | - Paulo J Oliveira
- CNC, Center for Neuroscience and Cellular Biology, UC-Biotech Building, Biocant Park, University of Coimbra , 3060-107 Cantanhede, Portugal
| | - Maria F Duarte
- Centro de Biotecnologia Agrı́cola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja) , Apartado 6158, 7801-908 Beja, Portugal
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10
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Euphorins A–H: bioactive diterpenoids from Euphorbia fischeriana. J Nat Med 2016; 70:412-22. [DOI: 10.1007/s11418-016-0987-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 03/11/2016] [Indexed: 10/22/2022]
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Krishnan N, Krishnan K, Connors CR, Choy MS, Page R, Peti W, Van Aelst L, Shea SD, Tonks NK. PTP1B inhibition suggests a therapeutic strategy for Rett syndrome. J Clin Invest 2015. [PMID: 26214522 DOI: 10.1172/jci80323] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The X-linked neurological disorder Rett syndrome (RTT) presents with autistic features and is caused primarily by mutations in a transcriptional regulator, methyl CpG-binding protein 2 (MECP2). Current treatment options for RTT are limited to alleviating some neurological symptoms; hence, more effective therapeutic strategies are needed. We identified the protein tyrosine phosphatase PTP1B as a therapeutic candidate for treatment of RTT. We demonstrated that the PTPN1 gene, which encodes PTP1B, was a target of MECP2 and that disruption of MECP2 function was associated with increased levels of PTP1B in RTT models. Pharmacological inhibition of PTP1B ameliorated the effects of MECP2 disruption in mouse models of RTT, including improved survival in young male (Mecp2-/y) mice and improved behavior in female heterozygous (Mecp2-/+) mice. We demonstrated that PTP1B was a negative regulator of tyrosine phosphorylation of the tyrosine kinase TRKB, the receptor for brain-derived neurotrophic factor (BDNF). Therefore, the elevated PTP1B that accompanies disruption of MECP2 function in RTT represents a barrier to BDNF signaling. Inhibition of PTP1B led to increased tyrosine phosphorylation of TRKB in the brain, which would augment BDNF signaling. This study presents PTP1B as a mechanism-based therapeutic target for RTT, validating a unique strategy for treating the disease by modifying signal transduction pathways with small-molecule drugs.
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12
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Zhang J, Lv J, Wang X, Li D, Wang Z, Li G. A simple and visible colorimetric method through Zr4+–phosphate coordination for the assay of protein tyrosine phosphatase 1B and screening of its inhibitors. Analyst 2015; 140:5716-23. [DOI: 10.1039/c5an00970g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Inhibitors of protein tyrosine phosphatase 1B (PTP1B) are promising agents for the treatment of type 2 diabetes and obesity, so a colorimetric method has been developed in this work for PTP1B assay and screening of its inhibitors.
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Affiliation(s)
- Juan Zhang
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Jun Lv
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Xiaonan Wang
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Defeng Li
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Zhaoxia Wang
- Department of Oncology
- The Second Affiliated Hospital of Nanjing Medical University
- Nanjing 210011
- PR China
| | - Genxi Li
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
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13
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Lv J, Wang X, Zhang Y, Li D, Zhang J, Sun L. Adsorption between TC-stabilized AuNPs and the phosphate group: application of the PTP1B activity assay. Analyst 2015; 140:8017-22. [DOI: 10.1039/c5an01906k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Based on the adsorption between tetracycline (TC) and phosphate groups, a general colorimetric method is explored in this work by using TC-stabilized gold nanoparticles (TC/AuNPs) and 4-aminophenyl phosphate-functionalized Fe3O4 magnetic nanoparticles (APP/MNPs).
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Affiliation(s)
- Jun Lv
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Xiaonan Wang
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Yuanyuan Zhang
- Department of Obstetrics and Gynecology
- The First Affiliated Hospital of Nanjing Medical University
- 210036 Nanjing
- China
| | - Defeng Li
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Juan Zhang
- Laboratory of Biosensing Technology
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- PR China
| | - Lizhou Sun
- Department of Obstetrics and Gynecology
- The First Affiliated Hospital of Nanjing Medical University
- 210036 Nanjing
- China
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