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Pirzada AS, Khan H, Alam W, Darwish HW, Elhenawy AA, Kuznetsov A, Daglia M. Physicochemical properties, pharmacokinetic studies, DFT approach, and antioxidant activity of nitro and chloro indolinone derivatives. Front Chem 2024; 12:1360719. [PMID: 38562526 PMCID: PMC10982469 DOI: 10.3389/fchem.2024.1360719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 02/28/2024] [Indexed: 04/04/2024] Open
Abstract
The process of developing of new drugs is greatly hampered by their inadequate physicochemical, pharmacokinetic, and intrinsic characteristics. In this regard, the selected chloro indolinone, (Z)-6-chloro-3-(2-chlorobenzylidene)indolin-2-one (C1), and nitro indolinone, (Z)-6-chloro-3-(2-nitrobenzylidene)indolin-2-one (C2), were subjected to SwissADME and density function theory (DFT) analysis. For compounds C1 and C2, the BOILED-Egg pharmacokinetic model predicted intestinal absorption, blood-brain barrier (BBB) penetration, and p-glycoprotein interaction. According to the physicochemical analysis, C1 has exceptional drug-like characteristics suitable for oral absorption. Despite only being substrates for some of the major CYP 450 isoforms, compounds C1 and C2 were anticipated to have strong plasma protein binding and efficient distribution and block these isoforms. The DFT study using the B3LYP/6-311G(d,p) approach with implicit water effects was performed to assess the structural features, electronic properties, and global reactivity parameters (GRP) of C1 and C2. The DFT results provided further support for other studies, implying that C2 is more water-soluble than C1 and that both compounds can form hydrogen bonds and (weak) dispersion interactions with other molecules, such as solvents and biomolecules. Furthermore, the GRP study suggested that C1 should be more stable and less reactive than C2. A concentration-dependent 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging activity was shown by both C1 and C2. In brief, this finding has provided a strong foundation to explore further the therapeutic potential of these molecules against a variety of human disorders.
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Affiliation(s)
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Waqas Alam
- Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Hany W. Darwish
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed A. Elhenawy
- Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Aleksey Kuznetsov
- Department of Chemistry, Universidad Técnica Federico Santa Maria, Santiago, Chile
| | - Maria Daglia
- Department of Pharmacy, University of Napoli Federico II, Naples, Italy
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang, China
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Pan T, He M, Deng L, Li J, Fan Y, Hao X, Mu S. Design, Synthesis, and Evaluation of the COX-2 Inhibitory Activities of New 1,3-Dihydro- 2H-indolin-2-one Derivatives. Molecules 2023; 28:4668. [PMID: 37375225 DOI: 10.3390/molecules28124668] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/02/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Thirty-three 1,3-dihydro-2H-indolin-2-one derivatives bearing α, β-unsaturated ketones were designed and synthesized via the Knoevenagel condensation reaction. The cytotoxicity, in vitro anti-inflammatory ability, and in vitro COX-2 inhibitory activity of all the compounds were evaluated. Compounds 4a, 4e, 4i-4j, and 9d exhibited weak cytotoxicity and different degrees of inhibition against NO production in LPS-stimulated RAW 264.7 cells. The IC50 values of compounds 4a, 4i, and 4j were 17.81 ± 1.86 μM, 20.41 ± 1.61 μM, and 16.31 ± 0.35 μM, respectively. Compounds 4e and 9d showed better anti-inflammatory activity with IC50 values of 13.51 ± 0.48 μM and 10.03 ± 0.27 μM, respectively, which were lower than those of the positive control ammonium pyrrolidinedithiocarbamate (PDTC). Compounds 4e, 9h, and 9i showed good COX-2 inhibitory activities with IC50 values of 2.35 ± 0.04 µM, 2.422 ± 0.10 µM and 3.34 ± 0.05 µM, respectively. Moreover, the possible mechanism by which COX-2 recognized 4e, 9h, and 9i was predicted by molecular docking. The results of this research suggested that compounds 4e, 9h, and 9i might be new anti-inflammatory lead compounds for further optimization and evaluation.
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Affiliation(s)
- Taohua Pan
- College of Pharmacy, Guizhou University, Guiyang 550025, China
| | - Maofei He
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Lulu Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Jiang Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Yanhua Fan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
| | - Xiaojiang Hao
- Kunming Institute of Botany, Chinese Academy of Sciences (CAS), Kunming 650201, China
| | - Shuzhen Mu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China
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Ahmad I, Khan H, Serdaroğlu G. Physicochemical Properties, Drug Likeness, ADMET, DFT Studies and in vitro antioxidant activity of Oxindole Derivatives. Comput Biol Chem 2023; 104:107861. [PMID: 37060784 DOI: 10.1016/j.compbiolchem.2023.107861] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/14/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
Poor pharmacokinetic and safety profiles create significant hurdles in the drug development process. This work focuses on a detailed understanding of drug discovery interplay among physicochemical, pharmacokinetic, toxicity endpoints, and antioxidant properties of oxindole derivatives. DFT compıutations were also performed at B3LYP/6-311G** level to evaluate the physicochemical properties, global reactivity features, and intramolecular interactions. The BOILED-Egg pharmacokinetic model envisaged gastrointestinal absorption, blood-brain barrier penetration, and no interaction with p-glycoprotein for compounds C1 and C2. The physicochemical evaluation revealed that C1 possesses superior drug-like properties fit for oral absorption. Both derivatives were predicted to have high plasma protein binding, efficient distribution, and inhibiting CYP 450 major isoforms but serve as substrates only for a few of them. Both molecules have mild to moderate clearance rates. Out of ten toxicity parameters, only hepatotoxicity was predicted. DFT results implied that the meta position of the -OH group made the possibility of charge transfer greater than -para positioned -OH, due to the ΔNmax (eV) values of molecules C1 and C2 being calculated at 2.596 and 2.477, respectively. Both C1 and C2 exhibited a concentration dependant DPPH and ABTS radical scavenging activity. The chemical structure-physicochemical-pharmacokinetic relationship identified the meta position as the favorite for the electron-withdrawing hydroxyl group. This provides useful insight to medicinal chemists to design 6-chlorooxindole derivatives with an acceptable drug-like and pharmacokinetic property.
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Manna A, Joshi H, Singh VK. Asymmetric Synthesis of Spiro-3,3'-cyclopropyl Oxindoles via Vinylogous Michael Initiated Ring Closure Reaction. J Org Chem 2022; 87:16755-16766. [PMID: 36468901 DOI: 10.1021/acs.joc.2c02402] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel organocatalytic cascade approach for the synthesis of spiro-cyclopropyl oxindole derivatives has been developed. The methodology is based on asymmetric vinylogous Michael addition of 4-nitroisoxazole derivatives to N-Boc isatylidene malonates followed by intramolecular alkylation. Its remarkable stereocontrol, wide substrate scope, and scalability highlight this new developed strategy. Moreover, this work represents the first example of vinylogous Michael initiated ring closure (MIRC) reaction for the synthesis of chiral 3,3'-cyclopropyl oxindole.
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Affiliation(s)
- Abhijit Manna
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Harshit Joshi
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Vinod K Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
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Hublikar M, Kadu V, Raut D, Shirame S, Anbarasu S, Al-Muhanna MK, Makam P, Bhosale R. 3-Substituted-2-oxindole derivatives: Design, synthesis and their anti-tuberculosis and radical scavenging dual-action studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132903] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Radhoff N, Studer A. Oxindole synthesis via polar-radical crossover of ketene-derived amide enolates in a formal [3 + 2] cycloaddition. Chem Sci 2022; 13:3875-3879. [PMID: 35432887 PMCID: PMC8966637 DOI: 10.1039/d1sc07134c] [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: 12/22/2021] [Accepted: 03/08/2022] [Indexed: 12/27/2022] Open
Abstract
Herein we introduce a simple, efficient and transition-metal free method for the preparation of valuable and sterically hindered 3,3-disubstituted oxindoles via polar-radical crossover of ketene derived amide enolates. Various easily accessible N-alkyl and N-arylanilines are added to disubstituted ketenes and the resulting amide enolates undergo upon single electron transfer oxidation a homolytic aromatic substitution (HAS) to provide 3,3-disubstituted oxindoles in good to excellent yields. A variety of substituted anilines and a 3-amino pyridine engage in this oxidative formal [3 + 2] cycloaddition and cyclic ketenes provide spirooxindoles. Both substrates and reagents are readily available and tolerance to functional groups is broad.
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Affiliation(s)
- Niklas Radhoff
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Germany
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Khetmalis YM, Shivani M, Murugesan S, Chandra Sekhar KVG. Oxindole and its derivatives: A review on recent progress in biological activities. Biomed Pharmacother 2021; 141:111842. [PMID: 34174506 DOI: 10.1016/j.biopha.2021.111842] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/02/2021] [Accepted: 06/16/2021] [Indexed: 12/13/2022] Open
Abstract
Oxindole has been shown to be a pharmacologically advantageous scaffold having many biological properties that are relevant to medicinal chemistry. The simplicity and widespread occurrence of this scaffold in plant-based alkaloids have further reinforced oxindole's merit in the domain of novel drug discovery. First extracted from Uncaria tomentosa, commonly the known as cat claw's plant which was found abundantly in the Amazon rainforest, molecules with the oxindole moiety have been shown to be common in a wide variety of compounds extracted from plant sources. The role of oxindole as a chemical scaffold for fabricating and designing biological drugs agents can be ascribed to its ability to be modified by a number of chemical groups to generate novel biological functions. This review is aimed at providing a description of the general chemistry based on existing corresponding structure-activity relationships (SARs) and compile all recent developmentary studies on oxindole-derived compounds as a successful pharmaceutical agent. A substantial group of oxindole derivatives are chiefly being tested as anticancer agents, however, a several oxindole derivatives have been shown to possesses antimicrobial, α-glucosidase inhibitory, antiviral, antileishmanial, antitubercular, antioxidative, tyrosinase inhibitory, PAK4 inhibitory, antirheumatoid arthritis and intraocular pressure reducing activities, to name a few. In this review we show the potential value of developing newer oxindole derivatives with an improved range of pharmacological implications as well as identifying drugs possessing oxindole core, that are showing and serving increased efficacy in clinical practice.
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Affiliation(s)
- Yogesh Mahadu Khetmalis
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, Telangana, India
| | - Mithula Shivani
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, Telangana, India
| | - Sankaranarayanan Murugesan
- Medicinal Chemistry Research Laboratory, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani 33303, Rajasthan, India
| | - Kondapalli Venkata Gowri Chandra Sekhar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, Telangana, India.
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Treatment with Uncaria tomentosa Promotes Apoptosis in B16-BL6 Mouse Melanoma Cells and Inhibits the Growth of B16-BL6 Tumours. Molecules 2021; 26:molecules26041066. [PMID: 33670520 PMCID: PMC7922471 DOI: 10.3390/molecules26041066] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/13/2021] [Accepted: 02/16/2021] [Indexed: 01/02/2023] Open
Abstract
Uncaria tomentosa is a medicinal plant native to Peru that has been traditionally used in the treatment of various inflammatory disorders. In this study, the effectiveness of U. tomentosa as an anti-cancer agent was assessed using the growth and survival of B16-BL6 mouse melanoma cells. B16-BL6 cell cultures treated with both ethanol and phosphate-buffered saline (PBS) extracts of U. tomentosa displayed up to 80% lower levels of growth and increased apoptosis compared to vehicle controls. Treatment with ethanolic extracts of Uncaria tomentosa were much more effective than treatment with aqueous extracts. U. tomentosa was also shown to inhibit B16-BL6 cell growth in C57/bl mice in vivo. Mice injected with both the ethanolic and aqueous extracts of U. tomentosa showed a 59 ± 13% decrease in B16-BL6 tumour weight and a 40 ± 9% decrease in tumour size. Histochemical analysis of the B16-BL6 tumours showed a strong reduction in the Ki-67 cell proliferation marker in U. tomentosa-treated mice and a small, but insignificant increase in terminal transferase dUTP nick labelling (TUNEL) staining. Furthermore, U. tomentosa extracts reduced angiogenic markers and reduced the infiltration of T cells into the tumours. Collectively, the results in this study concluded that U. tomentosa has potent anti-cancer activity that significantly inhibited cancer cells in vitro and in vivo.
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Ciani F, Cocchia N, Calabrò V, Pollice A, Maruccio L, Carotenuto D, Esposito L, Avallone L, Tafuri S. Uncaria tomentosa: A promising source of therapeutic agents for prevention and treatment of oxidative stress and cancer. Cancer 2021. [DOI: 10.1016/b978-0-12-819547-5.00045-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Castilhos LG, Oliveira JS, Adefegha SA, Manzoni AG, Passos DF, Assmann CE, Silveira LL, Trelles KB, Kronbauer M, Doleski PH, Bremm JM, Braun J, Abdalla FH, Gonçalves JF, Andrade CM, Cruz IBM, Burger ME, Leal DBR. Uncaria tomentosa improves cognition, memory and learning in middle-aged rats. Exp Gerontol 2020; 138:111016. [PMID: 32628974 DOI: 10.1016/j.exger.2020.111016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 06/10/2020] [Accepted: 06/23/2020] [Indexed: 10/23/2022]
Abstract
Aging accelerates neurodegeneration, while natural and safe neuroprotective agents, such as Uncaria tomentosa, may help to overcome this problem. This study assessed the effects of U. tomentosa extract treatment on the aging process in the brain of Wistar rats. The spatial memory and learning, acetylcholinesterase (AChE) activity, and DNA damage were assessed. Animals of 14 months were tested with different doses of U. tomentosa (5 mg/kg, 15 mg/kg, and 30 mg/kg) and with different durations of treatment (one month and one year). In the Morris Water Maze (MWM), the escape latency was significantly (p < 0.0001) shorter in rats that received 5 mg/kg, 15 mg/kg, and 30 mg/kg of U. tomentosa for both one month and one year of treatment. There was a significant difference in time spent at the platform zone (p < 0.05) of the middle-aged rats treated with U. tomentosa extract for one year when compared to the control rats. The cortex and hippocampus of rats treated with U. tomentosa for one year showed significant (p > 0.05) reduction in AChE activity. DNA damage index on cortex was significantly lower (p < 0.05) in animals treated with 30 mg/kg of U. tomentosa for one month while all the tested doses demonstrated significant (p < 0.001) reductions in DNA damage index in animals treated for one year. In conclusion, U. tomentosa may represent a source of phytochemicals that could enhance memory activity, repair DNA damage, and alter AChE activity, thereby providing neuroprotection during the aging process.
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Affiliation(s)
- Lívia G Castilhos
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil; Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Juliana S Oliveira
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Stephen A Adefegha
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil; Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil; Department of Biochemistry, Federal University of Technology, P. M. B. 704, Akure, Nigeria
| | - Alessandra G Manzoni
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Daniela F Passos
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Charles E Assmann
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Leonardo L Silveira
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Kelly B Trelles
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil; Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Maikel Kronbauer
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Pedro H Doleski
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - João M Bremm
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Josiane Braun
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Fatima H Abdalla
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil; Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Jamile F Gonçalves
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Cinthia M Andrade
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Ivana B M Cruz
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil
| | - Marilise E Burger
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil; Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Daniela B R Leal
- Departamento de Microbiologia e Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil; Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900 Santa Maria, RS, Brazil.
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Ribeiro AF, Santos JF, Mattos RR, Barros EGO, Nasciutti LE, Cabral LM, Sousa VPDE. Characterization and in vitro antitumor activity of polymeric nanoparticles loaded with Uncaria tomentosa extract. AN ACAD BRAS CIENC 2020; 92:e20190336. [PMID: 32321026 DOI: 10.1590/0001-3765202020190336] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 08/05/2019] [Indexed: 11/22/2022] Open
Abstract
Uncaria tomentosa (UT) extracts have been shown to have promising anti-tumor activity. We hypothesized that its incorporation into nanostructured systems could improve the anticancer properties. Here, poly-e-caprolactone (PCL) and poly-d,l-lactide-co-glycolide (PLGA) were employed to generate nanoparticles loaded with UT extract in a single emulsion solvent evaporation method. The nanoparticles were characterized by particle size, zeta potential, morphology and entrapment efficiency along with stability and release profiles. The nanoparticles presented entrapment efficiencies above 60% and a mean diameter below 300nm. UT-PCL nanoparticles presented higher entrapment efficiency and mean particle size as well as a slow release rate. The UT-PLGA nanoparticles showed higher drug loading. Two prostate cancer cell-lines, LNCaP and DU145 that were derived from metastatic sites, served as model systems to assess cytotoxicity and anti-cancer activity. In vitro, both formulations reduced the viability of DU145 and LNCaP cells. Yet, the UT-PLGA nanoparticles showed higher cytotoxicity towards DU145 cells while the UTPCL against LNCaP cells. The results confirm that the incorporation of UT into nanoparticles could enhance its anti-cancer activities that can offer a viable alternative for the treatment of prostrate canner and highlights the potential of nanostructured systems to provide a promising methodology to enhance the activity of natural extracts.
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Affiliation(s)
- Ana F Ribeiro
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, 21941-902 Rio de Janeiro, RJ, Brazil.,Faculdade de Farmácia, Federal Institute of Education, Science and Technology of Rio de Janeiro, Rua Professor Carlos Wenceslau, 343, 21715-000 Rio de Janeiro, RJ, Brazil
| | - Juliana F Santos
- Faculdade de Farmácia, Federal Institute of Education, Science and Technology of Rio de Janeiro, Rua Professor Carlos Wenceslau, 343, 21715-000 Rio de Janeiro, RJ, Brazil
| | - Rômulo R Mattos
- Programa de pesquisa em Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, 21941-902 Rio de Janeiro, RJ, Brazil
| | - Eliane G O Barros
- Programa de pesquisa em Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, 21941-902 Rio de Janeiro, RJ, Brazil
| | - Luiz Eurico Nasciutti
- Programa de pesquisa em Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, 21941-902 Rio de Janeiro, RJ, Brazil
| | - Lúcio M Cabral
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, 21941-902 Rio de Janeiro, RJ, Brazil
| | - Valeria P DE Sousa
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, 21941-902 Rio de Janeiro, RJ, Brazil
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Shin J, Magar KBS, Lee J, Kim KS, Lee YR. Design, synthesis, and discovery of novel oxindoles bearing 3-heterocycles as species-specific and combinatorial agents in eradicating Staphylococcus species. Sci Rep 2019; 9:8012. [PMID: 31527598 PMCID: PMC6746789 DOI: 10.1038/s41598-019-44304-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 05/14/2019] [Indexed: 01/12/2023] Open
Abstract
A series of new functionalized 3-indolylindolin-2-ones, 3-(1-methylpyrrol-2-yl)indolin-2-ones, and 3-(thiophen-2-yl)indolin-2-ones were synthesized by using novel indium (III)-catalysed reaction of various 3-diazoindolin-2-ones with indoles, 1-methylpyrrole, or thiophene via one-pot procedure. The newly synthesized compounds were characterized and screened for their in vitro antibacterial activity against various Staphylococcus species, including methicillin-resistant Staphylococcus aureus. results revealed that five compounds KS15, KS16, KS17, KS19, and KS20 exhibited potent and specific antibacterial activity against Staphylococcus species albeit inactive against Gram-negative bacteria. Especially, compounds exhibited superior antibacterial potency against Staphylococcus epidermidis compared to the reference drug streptomycin. The most potential compound KS16 also increased the susceptibility of Staphylococcus aureus to ciprofloxacin, gentamicin, kanamycin, and streptomycin. Among them, KS16 was found to be a synergistic compound with gentamicin and kanamycin. Furthermore, the cellular level of autolysin protein was increased from the KS16-treated Staphylococcus aureus cells. Finally, in vitro CCK-8 assays showed that KS16 exhibited no cytotoxicity at the minimum inhibitory concentrations used for killing Staphylococcus species. From all our results, novel oxindole compounds directly have lethal action or boost existing antibiotic power with the reduction of doses and toxicity in the treatment of multidrug-resistant Staphylococcus species.
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Affiliation(s)
- Jonghoon Shin
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, 46241, Republic of Korea
| | | | - Jungwoon Lee
- Environmental Disease Research Center, Korea Research Institute of Bioscience & Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Kwang-Sun Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, 46241, Republic of Korea.
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
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Antioxidant Activity of an Aqueous Leaf Extract from Uncaria tomentosa and Its Major Alkaloids Mitraphylline and Isomitraphylline in Caenorhabditis elegans. Molecules 2019; 24:molecules24183299. [PMID: 31510078 PMCID: PMC6766911 DOI: 10.3390/molecules24183299] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 08/31/2019] [Accepted: 09/04/2019] [Indexed: 12/24/2022] Open
Abstract
Uncaria tomentosa (Rubiaceae) has a recognized therapeutic potential against various diseases associated with oxidative stress. The aim of this research was to evaluate the antioxidant potential of an aqueous leaf extract (ALE) from U. tomentosa, and its major alkaloids mitraphylline and isomitraphylline. The antioxidant activity of ALE was investigated in vitro using standard assays (DPPH, ABTS and FRAP), while the in vivo activity and mode of action were studied using Caenorhabditis elegans as a model organism. The purified alkaloids did not exhibit antioxidant effects in vivo. ALE reduced the accumulation of reactive oxygen species (ROS) in wild-type worms, and was able to rescue the worms from a lethal dose of the pro-oxidant juglone. The ALE treatment led to a decreased expression of the oxidative stress response related genes sod-3, gst-4, and hsp-16.2. The treatment of mutant worms lacking the DAF-16 transcription factor with ALE resulted in a significant reduction of ROS levels. Contrarily, the extract had a pro-oxidant effect in the worms lacking the SKN-1 transcription factor. Our results suggest that the antioxidant activity of ALE in C. elegans is independent of its alkaloid content, and that SKN-1 is required for ALE-mediated stress resistance.
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Corso CR, Acco A. Glutathione system in animal model of solid tumors: From regulation to therapeutic target. Crit Rev Oncol Hematol 2018; 128:43-57. [DOI: 10.1016/j.critrevonc.2018.05.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 04/10/2018] [Accepted: 05/16/2018] [Indexed: 02/07/2023] Open
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15
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Hassani H, Zakerinasab B, Hossien Poor H. Synthesis, characterization and application of alumina/ vanadium pentoxide nanocomposit by sol-gel method. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3945] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hassan Hassani
- Department of Chemistry; Payam Noor University; Birjand Iran
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16
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Navarro-Hoyos M, Lebrón-Aguilar R, Quintanilla-López JE, Cueva C, Hevia D, Quesada S, Azofeifa G, Moreno-Arribas MV, Monagas M, Bartolomé B. Proanthocyanidin Characterization and Bioactivity of Extracts from Different Parts of Uncaria tomentosa L. (Cat's Claw). Antioxidants (Basel) 2017; 6:E12. [PMID: 28165396 PMCID: PMC5384175 DOI: 10.3390/antiox6010012] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 01/11/2017] [Accepted: 01/26/2017] [Indexed: 11/17/2022] Open
Abstract
Apart from alkaloids, bioactive properties of Uncaria tomentosa L. have been attributed to its phenolic constituents. Although there are some reports concerning low-molecular-weight polyphenols in U. tomentosa, its polymeric phenolic composition has been scarcely studied. In this study, phenolic-rich extracts from leaves, stems, bark and wood (n = 14) of Uncaria tomentosa plants from several regions of Costa Rica were obtained and analysed in respect to their proanthocyanidin profile determined by a quadrupole-time-of-flight analyser (ESI-QTOF MS). Main structural characteristics found for U. tomentosa proanthocyanidins were: (a) monomer composition, including pure procyanidins (only composed of (epi)catechin units) and propelargonidins (only composed of (epi)afzelechin units) as well as mixed proanthocyanidins; and (b) degree of polymerization, from 3 up to 11 units. In addition, U. tomentosa phenolic extracts were found to exhibit reasonable antioxidant capacity (ORAC (Oxygen Radical Absorbance Capacity) values between 1.5 and 18.8 mmol TE/g) and antimicrobial activity against potential respiratory pathogens (minimum IC50 of 133 µg/mL). There were also found to be particularly cytotoxic to gastric adenocarcinoma AGS and colon adenocarcinoma SW620 cell lines. The results state the particularities of U. tomentosa proanthocyanidins and suggest the potential value of these extracts with prospective use as functional ingredients.
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Affiliation(s)
- Mirtha Navarro-Hoyos
- Department of Chemistry, University of Costa Rica (UCR), Sede Rodrigo Facio, San Pedro de Montes de Oca, San José 2060, Costa Rica.
| | - Rosa Lebrón-Aguilar
- Institute of Physical Chemistry "Rocasolano", CSIC,C/ Serrano 119, Madrid 28006, Spain.
| | | | - Carolina Cueva
- Institute of Food Science Research (CIAL), CSIC-UAM, C/ Nicolás Cabrera 9, Madrid 28049, Spain.
| | - David Hevia
- IUOPA-Redox Biology Group, Department of Cellular Morphology and Biology, Faculty of Medicine, University of Oviedo, C/ Julian Claveria 6, Oviedo 33006, Spain.
| | - Silvia Quesada
- Department of Biochemistry, School of Medicine, University of Costa Rica (UCR), Sede Rodrigo Facio, San Pedro de Montes de Oca, San José 2060, Costa Rica.
| | - Gabriela Azofeifa
- Department of Biochemistry, School of Medicine, University of Costa Rica (UCR), Sede Rodrigo Facio, San Pedro de Montes de Oca, San José 2060, Costa Rica.
| | | | - María Monagas
- Institute of Food Science Research (CIAL), CSIC-UAM, C/ Nicolás Cabrera 9, Madrid 28049, Spain.
| | - Begoña Bartolomé
- Institute of Food Science Research (CIAL), CSIC-UAM, C/ Nicolás Cabrera 9, Madrid 28049, Spain.
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Allen L, Buckner A, Buckner CA, Cano P, Lafrenie RM. Uncaria tomentosa (Willd. ex Schult.) DC (Rubiaceae) Sensitizes THP-1 Cells to Radiation-induced Cell Death. Pharmacognosy Res 2017; 9:221-229. [PMID: 28827961 PMCID: PMC5541476 DOI: 10.4103/pr.pr_83_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Background: Uncaria tomentosa (Willd. ex Schult.) DC (Rubiaceae), known as Cat's Claw or Uña de gato, is a traditionally used medicinal plant native to Peru. Some studies have shown that U. tomentosa can act as an antiapoptotic agent and enhance DNA repair in chemotherapy-treated cells although others have shown that U. tomentosa enhanced apoptosis. Objective: To determine if treatment with U. tomentosa can significantly enhance cell death in THP-1 cells exposed to ionizing radiation. Materials and Methods: THP-1 monocyte-like cells were treated with ethanolic extracts of U. tomentosa in the presence or absence of bacterial lipopolysaccharide and then exposed to ionizing radiation. Cell proliferation was assessed by MTT and clonogenic assays and the effects on cell cycle measured by flow cytometry and immunoblotting. Changes in cell signaling were determined by immunoblotting and cytokine ELISA and activation of apoptosis measured by caspase activation and DNA fragmentation analysis. Results: Treatment of THP-1 cells with U. tomentosa had a small effect on cell proliferation. However, when the U. tomentosa-pretreated cells were also subjected to 5–9 Gy ionizing radiation, they showed a significant decrease in cell proliferation and increased cellular apoptosis as measured by DNA fragmentation and caspase activation. Treatment with U. tomentosa also decreased the expression of Cyclin E and Cyclin B, key regulators of normal cell cycle progression, and decreased the phosphorylation of various stress-activated, cell survival proteins including p38, ERK, and SAP/JNK kinase. Conclusions: These results suggest that U. tomentosa could be useful in enhancing cell death following anticancer therapies including ionizing radiation. SUMMARY Treatment of THP-1 cells with Uncaria tomentosa increases their susceptibility to X-rays. The combination of Uncaria tomentosa and X-ray exposure strongly inhibits cell signaling and promotes apoptosis.
Abbreviations Used: LPS: Lipopolysaccharide, TNF: Tumor necrosis factor: IL-1, Interleukin-1: SDS: Sodium dodecylsulphate, TBS: Tris-buffered saline.
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Affiliation(s)
- Lisa Allen
- Program in Biomolecular Science, Laurentian University, Sudbury, ON P3E 2C6, Canada.,Health Sciences North, Sudbury, ON P3E 5J1, Canada
| | - Alison Buckner
- Program in Biomolecular Science, Laurentian University, Sudbury, ON P3E 2C6, Canada.,Health Sciences North, Sudbury, ON P3E 5J1, Canada
| | - Carly A Buckner
- Program in Biomolecular Science, Laurentian University, Sudbury, ON P3E 2C6, Canada.,Health Sciences North, Sudbury, ON P3E 5J1, Canada
| | - Pablo Cano
- Health Sciences North, Sudbury, ON P3E 5J1, Canada
| | - Robert M Lafrenie
- Program in Biomolecular Science, Laurentian University, Sudbury, ON P3E 2C6, Canada.,Health Sciences North, Sudbury, ON P3E 5J1, Canada.,Division of Medical Science, Northern Ontario School of Medicine, Sudbury, ON P3E 2C6, Canada.,Health Sciences North Research Institute, Sudbury, ON, P3E 5J1, Canada
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Yaragorla S, Dada R, Singh G, Pareek A, Rana M, Sharma AK. Ca(II)-Catalyzed Regioselective Cascade Synthesis of Oxindolyl- Naphthofurans through Meyer-Schuster type Rearrangement. ChemistrySelect 2016. [DOI: 10.1002/slct.201601349] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Srinivasarao Yaragorla
- Department of Chemistry; School of Chemical Sciences & Pharmacy; Central University of Rajasthan, NH-8, Ajmer Distt; Rajasthan 305817 India
| | - Ravikrishna Dada
- Department of Chemistry; School of Chemical Sciences & Pharmacy; Central University of Rajasthan, NH-8, Ajmer Distt; Rajasthan 305817 India
| | - Garima Singh
- Department of Chemistry; School of Chemical Sciences & Pharmacy; Central University of Rajasthan, NH-8, Ajmer Distt; Rajasthan 305817 India
| | - Abhishek Pareek
- Department of Chemistry; School of Chemical Sciences & Pharmacy; Central University of Rajasthan, NH-8, Ajmer Distt; Rajasthan 305817 India
| | - Monika Rana
- Department of Chemistry; School of Chemical Sciences & Pharmacy; Central University of Rajasthan, NH-8, Ajmer Distt; Rajasthan 305817 India
| | - Anuj K. Sharma
- Department of Chemistry; School of Chemical Sciences & Pharmacy; Central University of Rajasthan, NH-8, Ajmer Distt; Rajasthan 305817 India
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Santos KF, Gutierres JM, Pillat MM, Rissi VB, Santos Araújo MDCD, Bertol G, Gonçalves PBD, Schetinger MRC, Morsch VM. Uncaria tomentosa extract alters the catabolism of adenine nucleotides and expression of ecto-5'-nucleotidase/CD73 and P2X7 and A1 receptors in the MDA-MB-231 cell line. JOURNAL OF ETHNOPHARMACOLOGY 2016; 194:108-116. [PMID: 27590731 DOI: 10.1016/j.jep.2016.08.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 08/22/2016] [Accepted: 08/30/2016] [Indexed: 06/06/2023]
Abstract
ETHOPHARMACOLOGICAL RELEVANCE Uncaria tomentosa (Willd.) DC. (Rubiaceae) (Ut), also known as cat's claw, is a woody liana widely spread throughout the Amazon rainforest of Central and South America, containing many chemical constituents such as oxindole alkaloids, which are responsible for various biological activities. Since ancient times, the indigenous people of Peru have used it as a bark infusion for the treatment of a wide range of health problems gastric ulcers, arthritis and rheumatism. Recently, Ut is distributed worldwide and used as an immunomodulatory and anti-inflammatory herbal remedy. Additionally, U. tomentosa also has antitumural activity. However, little is known about the action of U. tomentosa on the purinergic system mechanisms, which is involved in tumor progression. AIM OF THE STUDY Considering the pharmacological properties of U. tomentosa, we sought to evaluate the hydroalcoholic extract U tomentosa is able to influence the purinergic system in breast cancer cells, MDA-MB-231. Through the activity and expression of ectonucleotidases (NTPDase - CD39; Ecto-5'-nucleotidase - CD73) and purinergic repceptores (P2X7 and A1). MATERIALS AND METHODS A hydroalcoholic extract was prepared in two concentrations, 250 and 500μg/mL. (Ut250; Ut500). The effect of these concentrations on the activity and expression of ectonucleotidases, as well as on the density of purinergic receptors were investigated in MDA-MB-231 breast cancer cells. Cells were treated with the hydroalcoholic extract of Uncaria tomentosa and/or doxorubicin (Doxo 1μM; Ut250+Doxo; Ut500+Doxo) for 24h. RESULTS Although the results were not significant for the hydrolysis of the ATP, they presented an increase in the ADP hydrolysis in the Ut500+Doxo group when compared to the control group. Additionally, the activity of 5'-nucleotidase was inhibited in all groups when compared with the untreated group of cells. Inhibition of the enzyme was more evident in groups with U. tomentosa per se. The expression of CD39 was increased in the Ut250 and Ut250+Doxo groups when compared to the control group. No changes were found in the CD73 expression. Furthermore, a reduction in the density of the P2X7 receptor in all treated groups was detected. On the other hand, the density of the A1 receptor increased in all groups compared to the control group, with the exception of the Ut500+Doxo group. CONCLUSION Therefore, we conclude that hydroalcoholic extract of U. tomentosa may be responsible for the reduction of adenosine levels in the extracellular medium, which accelerates tumor progression. Interestingly, the dysregulation of A1 and P2X7 receptors in the MDA-MB-231 cells exacerbate the proliferation of this cells and U. tomentosa treatment may be stimulate the antitumor activity of adenosine A1 receptor and control the P2X7 effects. Our study demonstrates the significant participation of purinergic pathway in the regulation of MDA-MB-231 progression; additionally, U. tomentosa treatment alone or combined with chemotherapy may favor the action of doxorubicin.
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Affiliation(s)
- Karen Freitas Santos
- Department of Biochemistry and Molecular Biology, CCNE, Federal University of Santa Maria (UFSM), Avenida Roraima, Prédio 18, CEP 97105-900 Santa Maria, RS, Brazil; Department of Health Sciences, Regional Integrada University (URI), CEP 984000-000 Frederico Westphalen, RS, Brazil.
| | - Jessié Martins Gutierres
- Department of Biochemistry and Molecular Biology, CCNE, Federal University of Santa Maria (UFSM), Avenida Roraima, Prédio 18, CEP 97105-900 Santa Maria, RS, Brazil
| | - Micheli Mainardi Pillat
- Chemistry Institute, University of São Paulo (USP), Avenida Professor Lineu Prestes 748, CEP 05508-900 São Paulo, SP, Brazil
| | - Vitor Braga Rissi
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria (UFSM), Avenida Roraima, Prédio 97, CEP 97105-900 Santa Maria, RS, Brazil
| | | | | | - Paulo Bayard Dias Gonçalves
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria (UFSM), Avenida Roraima, Prédio 97, CEP 97105-900 Santa Maria, RS, Brazil
| | - Maria Rosa Chitolina Schetinger
- Department of Biochemistry and Molecular Biology, CCNE, Federal University of Santa Maria (UFSM), Avenida Roraima, Prédio 18, CEP 97105-900 Santa Maria, RS, Brazil
| | - Vera Maria Morsch
- Department of Biochemistry and Molecular Biology, CCNE, Federal University of Santa Maria (UFSM), Avenida Roraima, Prédio 18, CEP 97105-900 Santa Maria, RS, Brazil.
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Kaur M, Singh M, Chadha N, Silakari O. Oxindole: A chemical prism carrying plethora of therapeutic benefits. Eur J Med Chem 2016; 123:858-894. [PMID: 27543880 DOI: 10.1016/j.ejmech.2016.08.011] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 07/21/2016] [Accepted: 08/07/2016] [Indexed: 12/16/2022]
Abstract
Oxindole has emerged as a valuable scaffold in medicinal chemistry possessing diverse range of pharmacological activities. Its value has further been increased by its natural occurrence as alkaloids in variety of plants. It was first extracted from the cat claw's plant Uncaria tomentosa found in the Amazon rainforest and other tropical areas of South and Central America. Traditionally as well as present emerging therapeutic potential of oxindole nucleus has captured the interest of medicinal chemists to synthesize novel oxindole derivatives. In the present review the authors have integrated its chemistry and synthetic strategies developed after 1945. Also the information of naturally occurring oxindole alkaloids has been incorporated. The detailed pharmacological activities including anti-cancer, anti-HIV, antidiabetic, antibacterial, antioxidant, kinase inhibitory, AChE inhibitory, anti-leishmanial, β3 adrenergic receptor agonistic, phosphatase inhibitory, analgesic, spermicidal, vasopressin antagonists, progesterone antagonists, neuroprotection, and NMDA blocker activities of oxindole derivatives alongwith their SAR has also been discussed in detail. Additionally, information regarding the oxindole derivatives in clinical trials has been incorporated. Thus, this review will provide insights for the synthetic as well as medicinal chemist for the designing and synthesis of novel oxindole derivatives with novel improved range of pharmacological implications.
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Affiliation(s)
- Maninder Kaur
- Molecular Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Manjinder Singh
- Molecular Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Navriti Chadha
- Molecular Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Om Silakari
- Molecular Modeling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India.
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Bogdanov AV, Kutuzova TA, Krivolapov DB, Dobrynin AB, Mironov VF. 1-chloroacetyloxindole(isatin) in reactions with some N-nucleophiles. Unexpetedly easy cleavage of chloroacetyl group. RUSS J GEN CHEM+ 2016. [DOI: 10.1134/s1070363216030087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Yunis-Aguinaga J, Claudiano GS, Marcusso PF, Manrique WG, de Moraes JRE, de Moraes FR, Fernandes JBK. Uncaria tomentosa increases growth and immune activity in Oreochromis niloticus challenged with Streptococcus agalactiae. FISH & SHELLFISH IMMUNOLOGY 2015; 47:630-638. [PMID: 26434713 DOI: 10.1016/j.fsi.2015.09.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 09/23/2015] [Accepted: 09/29/2015] [Indexed: 06/05/2023]
Abstract
Cat's claw (Uncaria tomentosa) is an Amazon herb using in native cultures in Peru. In mammals, it has been described several effects of this herb. However, this is the first report of its use on the diet of fish. The aim of this study was to determinate the effect of this plant on the growth and immune activity in Oreochromis niloticus. Nile tilapia (81.3 ± 4.5 g) were distributed into 5 groups and supplemented with 0 (non-supplement fish), 75, 150, 300, and 450 mg of U. tomentosa.kg(-1) of diet for a period of 28 days. Fish were inoculated in the swim bladder with inactivated Streptococcus agalactiae and samples were taken at 6, 24, and 48 h post inoculation (HPI). Dose dependent increases were noted in some of the evaluated times of thrombocytes and white blood cells counts (WBC) in blood and exudate, burst respiratory activity, lysozyme activity, melanomacrophage centers count (MMCs), villi length, IgM by immunohistochemistry in splenic tissue, and unexpectedly on growth parameters. However, dietary supplementation of this herb did not affect red blood cells count (RBC), hemoglobin, and there were no observed histological lesions in gills, intestine, spleen, and liver. The current results demonstrate for the first time that U. tomentosa can stimulate fish immunity and improve growth performance in Nile tilapia.
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Affiliation(s)
| | - Gustavo S Claudiano
- Department of Veterinary Pathology, School of Agrarian and Veterinary Sciences, Unesp, Jaboticabal, SP, Brazil
| | - Paulo F Marcusso
- Department of Veterinary Pathology, School of Agrarian and Veterinary Sciences, Unesp, Jaboticabal, SP, Brazil
| | - Wilson Gómez Manrique
- Department of Veterinary Pathology, School of Agrarian and Veterinary Sciences, Unesp, Jaboticabal, SP, Brazil
| | - Julieta R Engrácia de Moraes
- Aquaculture Center of UNESP, Jaboticabal, SP, Brazil; Department of Veterinary Pathology, School of Agrarian and Veterinary Sciences, Unesp, Jaboticabal, SP, Brazil
| | - Flávio R de Moraes
- Aquaculture Center of UNESP, Jaboticabal, SP, Brazil; Department of Veterinary Pathology, School of Agrarian and Veterinary Sciences, Unesp, Jaboticabal, SP, Brazil.
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Zhang Q, Zhao JJ, Xu J, Feng F, Qu W. Medicinal uses, phytochemistry and pharmacology of the genus Uncaria. JOURNAL OF ETHNOPHARMACOLOGY 2015; 173:48-80. [PMID: 26091967 DOI: 10.1016/j.jep.2015.06.011] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 05/31/2015] [Accepted: 06/05/2015] [Indexed: 05/26/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The genus Uncaria belongs to the family Rubiaceae, which mainly distributed in tropical regions, such as Southeast Asia, Africa and Southeast America. Their leaves and hooks have long been thought to have healing powers and are already being tested as a treatment for asthma, cancer, cirrhosis, diabetes, hypertension, stroke and rheumatism. The present review aims to provide systematically reorganized information on the ethnopharmacology, phytochemistry and pharmacology of the genus Uncaria to support for further therapeutic potential of this genus. To better understanding this genus, information on the stereo-chemistry and structure-activity relationships in indole alkaloids is also represented. MATERIAL AND METHODS The literature study of this review is based on various databases search (SCIFinder, Science Direct, CNKI, Wiley online library, Spring Link, Web of Science, PubMed, Wanfang Data, Medalink, Google scholar, ACS, Tropicos, Council of Heads of Australasian Herbaria, The New York Botanical Garden, African Plants Database at Genera Botanical Garden, The Plant List and SEINet) and library search for Biological Abstract and some local books on ethnopharmacology. RESULTS 19 species of the genus Uncaria are found to be important folk medicines in China, Malaysia, Phillippines, Africa and Southeast America, etc, and have been served for the treatment of asthma, rheumatism, hyperpyrexia, hypertension and headaches, etc. More than 200 compounds have been isolated from Uncaria, including indole alkaloids, triterpenes, flavonoids, phenols, phenylpropanoids, etc. As characteristic constituents, indole alkaloids have been considered as main efficacy component for hypertension, epilepsy, depressant, Parkinson's disease and Alzheimer's disease. In addition, pharmacokinetic and metabolism investigation reveal that the indole alkaloids are likely to be absorbed, metabolized and excreted at early time points. Moreover, the specific inhibition of CYP isozymes can regulate their hydroxylation metabolites at C-10 and C-11. CONCLUSION Preliminary investigations on pharmacological properties of the Uncaria species have enlightened their efficacious remedy for hypertension, asthma, cancer, diabetes, rheumatism and neurodegenerative diseases. To ensure the safety and effectiveness in clinical application, research on bioactive compounds, pharmacological mechanisms and toxicity of the genus Uncaria as well as the stereo-chemistry and structure-activity relationships of indole alkaloids seem very important.
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Affiliation(s)
- Qian Zhang
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Jiao Jiao Zhao
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Jian Xu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Feng Feng
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China.
| | - Wei Qu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China.
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Urdanibia I, Michelangeli F, Ruiz MC, Milano B, Taylor P. Anti-inflammatory and antitumoural effects of Uncaria guianensis bark. JOURNAL OF ETHNOPHARMACOLOGY 2013; 150:1154-1162. [PMID: 24212077 DOI: 10.1016/j.jep.2013.10.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 09/16/2013] [Accepted: 10/23/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Uncaria guianensis (Aublet) Gmell (Rubiaceae) is a medicinal plant from the jungles of South and Central America, used to treat cancer, arthritis, diabetes, and inflammation. Evaluate the anti-inflammatory and anti-tumor effects of Uncaria guianensis preparations. MATERIALS AND METHODS Bio-guided fractionation of a hydroethanolic extract of Uncaria guianensis was performed, evaluating the fractions and subfractions for their effect on inflammatory mediators, tumour necrosis factor alpha (TNF-α), interleukin 6 (IL-6) and prostaglandin E2 (PGE2) by ELISA and nitric oxide (NO) by the Griess reaction in cultured supernatant from RAW 264.7 macrophages stimulated with lipopolysaccharide (LPS). The expression of cyclooxygenase 2 (COX-2), inducible nitric oxide synthase (iNOS) and inhibitor of κB (IκB) were investigated in RAW 264.7 macrophages by flow cytometry. The activity of NF-κB in HeLa cells transfected with a luciferase reporter system was determined. The effect of Uncaria guianensis on the inflammatory response in vivo was assessed in BALB/c mice stimulated with LPS, on rat paw oedema induced by carrageenan, and on tumour growth and lung metastasis in BALB/c mice inoculated with 4T1 mammary tumour cells. Immune cell infiltrates and inflammatory mediators were evaluated in the tumour by immunohistochemistry. RESULTS Sub-fraction Ug AIV inhibited, to varying degrees, NO, TNF-α, IL-6 and PGE2 production by macrophages in vitro (30 μg/ml) and in the serum of LPS-challenged mice (5 mg/kg). Macrophage expression of Cox-2 was inhibited (35%), IκB degradation was completely inhibited and NF-κB activation was inhibited (70%) by Ug AIV at 30 μg/ml. Ug AIV decreased paw oedema by 86% (5 mg/kg) and serum NO and TNF-α by 45% and 65% respectively. Ug AIV reduced 4T1 mammary tumour growth by 91% on day 33 post-inoculation as well as the levels of serum NO, IL-6 and TNF-α in the same animals. Ug AIV decreased the number of tumour-infiltrating T lymphocytes, macrophages and neutrophils as well as the number of cells positive for COX-2, iNOS, IL-6, TNF-α and p65. CONCLUSIONS As Ug AIV was not cytotoxic for tumour cells or macrophages, its anti-tumour effect may be due to a reduction in pro-tumoural inflammatory processes in the tumour microenvironment, possibly mediated through NF-κB.
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Affiliation(s)
- I Urdanibia
- Laboratorio de Patología Celular y Molecular, Centro de Medicina Experimental, Instituto Venezolano de Investigaciones Científicas, Apartado 20632, Caracas 1020-A, Venezuela
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Pilarski R, Gurrola-Díaz CM, García-López PM, Soldevila G, Olejnik A, Grajek W, Gulewicz K. Enhanced proapoptotic response of the promyelocytic leukemia HL-60 cells treated with an Uncaria tomentosa alkaloid preparation. J Herb Med 2013. [DOI: 10.1016/j.hermed.2013.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Salaverry O. Back to the roots: traditional medicine for cancer control in Latin America and the Caribbean. Lancet Oncol 2013; 14:384. [PMID: 23628182 DOI: 10.1016/s1470-2045(13)70092-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oswaldo Salaverry
- Universidad Nacional Mayor de San Marcos and Centro Nacional de Salud Intercultural, Lima 01, Peru.
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Dreifuss AA, Bastos-Pereira AL, Fabossi IA, Lívero FADR, Stolf AM, Alves de Souza CE, Gomes LDO, Constantin RP, Furman AEF, Strapasson RLB, Teixeira S, Zampronio AR, Muscará MN, Stefanello MEA, Acco A. Uncaria tomentosa exerts extensive anti-neoplastic effects against the Walker-256 tumour by modulating oxidative stress and not by alkaloid activity. PLoS One 2013; 8:e54618. [PMID: 23408945 PMCID: PMC3567083 DOI: 10.1371/journal.pone.0054618] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 12/13/2012] [Indexed: 11/23/2022] Open
Abstract
This study aimed to compare the anti-neoplastic effects of an Uncaria tomentosa (UT) brute hydroethanolic (BHE) extract with those of two fractions derived from it. These fractions are choroformic (CHCl3) and n-butanolic (BuOH), rich in pentacyclic oxindole alkaloids (POA) and antioxidant substances, respectively. The cancer model was the subcutaneous inoculation of Walker-256 tumour cells in the pelvic limb of male Wistar rat. Subsequently to the inoculation, gavage with BHE extract (50 mg.kg(-1)) or its fractions (as per the yield of the fractioning process) or vehicle (Control) was performed during 14 days. Baseline values, corresponding to individuals without tumour or treatment with UT, were also included. After treatment, tumour volume and mass, plasma biochemistry, oxidative stress in liver and tumour, TNF-α level in liver and tumour homogenates, and survival rates were analysed. Both the BHE extract and its BuOH fraction successfully reduced tumour weight and volume, and modulated anti-oxidant systems. The hepatic TNF-α level indicated a greater effect from the BHE extract as compared to its BuOH fraction. Importantly, both the BHE extract and its BuOH fraction increased the survival time of the tumour-bearing animals. Inversely, the CHCl3 fraction was ineffective. These data represent an in vivo demonstration of the importance of the modulation of oxidative stress as part of the anti-neoplastic activity of UT, as well as constitute evidence of the lack of activity of isolated POAs in the primary tumour of this tumour lineage. These effects are possibly resulting from a synergic combination of substances, most of them with antioxidant properties.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Alexandra Acco
- Pharmacology Department, Federal University of Paraná, Brazil
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Ribeiro AF, de Oliveira Rezende RL, Cabral LM, de Sousa VP. Poly ɛ-caprolactone nanoparticles loaded with Uncaria tomentosa extract: preparation, characterization, and optimization using the Box-Behnken design. Int J Nanomedicine 2013; 8:431-42. [PMID: 23378765 PMCID: PMC3559076 DOI: 10.2147/ijn.s38491] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PURPOSE The aim of this research was to develop and optimize a process for obtaining poly ɛ-caprolactone (PCL) nanoparticles loaded with Uncaria tomentosa (UT) extract. METHODS Nanoparticles were produced by the oil-in-water emulsion solvent evaporation method. Preliminary experiments determined the initial conditions of the organic phase (OP) and of the aqueous phase (AP) that would be utilized for this study. Ultimately, a three-factor three-level Box-Behnken design (BBD) was employed during the optimization process. PCL and polyvinyl alcohol (PVA) concentrations (X(1) and X(2), respectively) and the AP/OP volume ratio (X(3)) were the independent variables studied, while entrapment efficiency (Y(1)), particle mean diameter (Y(2)), polydispersity (Y(3)), and zeta potential (Y(4)) served as the evaluated responses. RESULTS PRELIMINARY EXPERIMENTS REVEALED THAT THE OPTIMAL INITIAL CONDITIONS FOR THE PREPARATION OF NANOPARTICLES WERE AS FOLLOWS: OP composed of 5 mL ethyl acetate/acetone (3/2) mixture containing UT extract and PCL, and an AP of buffered PVA (pH 7.5) solution. Statistical analysis of the BBD results indicated that all of the studied factors had significant effects on the responses Y(1), Y(2), and Y(4,) and these effects are closely described or fitted by regression equations. Based on the obtained models and the selected desirability function, the nanoparticles were optimized to maximize Y(1) and minimize Y(2). These optimal conditions were achieved using 3% (w/v) PCL, 1% (w/v) PVA, and an AP/OP ratio of 1.7, with predicted values of 89.1% for Y(1) and 280 nm for Y(2). Another batch was produced under the same optimal conditions. The entrapment efficiency of this new batch was measured at 81.6% (Y(1)) and the particles had a mean size of 247 nm (Y(2)) and a polydispersity index of 0.062 (Y(3)). CONCLUSION This investigation obtained UT-loaded nanoparticle formulations with desired characteristics. The BBD approach was a useful tool for nanoparticle development and optimization, and thus should be useful especially in the realm of phytotherapeutics, in which varied compositions may be assessed in quantitative and qualitative terms.
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Affiliation(s)
- Ana Ferreira Ribeiro
- Department of Pharmaceutics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Bors M, Michałowicz J, Pilarski R, Sicińska P, Gulewicz K, Bukowska B. Studies of biological properties of Uncaria tomentosa extracts on human blood mononuclear cells. JOURNAL OF ETHNOPHARMACOLOGY 2012; 142:669-678. [PMID: 22683905 DOI: 10.1016/j.jep.2012.05.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 05/07/2012] [Accepted: 05/18/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Uncaria tomentosa (Willd.) DC is a lignified climbing plant from South and Central America, which (under the name of "vilcacora" or "cat's claw") has become highly popular in many countries due to its proven immunostimmulatory and anti-inflammatory activities and also with respect to its anticancer and antioxidative effects. There are insufficient data on the mechanism of U. tomentosa action on normal blood mononuclear cells. AIM OF THE STUDY The aim of the study was to analyze the impact of ethanol and aqueous extracts from bark and leaves of Uncaria tomentosa on the structure and function of human mononuclear cells and to find out whether the kind of extractant used modulates biological activity of the extracts studied. MATERIALS AND METHODS Plant material consisted of four different extracts: (1) ethanol extract from leaves, (2) aqueous extract from leaves, (3) ethanol extract from bark and (4) aqueous extract from bark. The effect of these extracts on protein damage as well as on free-radical formation in human peripheral blood mononuclear cells was analyzed. Moreover, changes in viability, size, and granularity as well as apoptotic alterations in human blood mononuclear cells exposed to U. tomentosa extracts were investigated. RESULTS The oxidative changes were observed in mononuclear blood cells exposed to both ethanol and aqueous extracts obtained from bark and leaves. Moreover, in the cells studied the extracts from U. tomentosa induced apoptosis and a decrease in viability of mononuclear blood cells, with the exception of aqueous extract from leaves. Additionally, no statistically significant changes in the cell size were observed both for aqueous extracts from leaves and bark. Changes in the blood mononuclear cell granularity were observed at 250 μg/mL for all extracts examined. The strongest changes were observed for the ethanol extract of the bark, which increased cell granularity at 50 μg/mL and changed cell size at 100 μg/mL. CONCLUSION The conducted research showed differences in biological activity between aqueous and ethanol extracts. It was observed that ethanol extracts exhibited stronger negative effects on mononuclear blood cells. The kind of extractant used had a significant influence of the chemical composition of the tested extracts. The ethanol extract from bark containing a high amount of polyphenols and alkaloids revealed the highest pro-apoptotic effect.
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Affiliation(s)
- Milena Bors
- Department of Biophysics of Environmental Pollution, University of Łódź, Pomorska 141/143, 90-237 Łódź, Poland
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Bukowska B, Bors M, Gulewicz K, Koter-Michalak M. Uncaria tomentosa extracts protect human erythrocyte catalase against damage induced by 2,4-D-Na and its metabolites. Food Chem Toxicol 2012; 50:2123-7. [PMID: 22426356 DOI: 10.1016/j.fct.2012.02.099] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 02/08/2012] [Accepted: 02/28/2012] [Indexed: 10/28/2022]
Abstract
The effect of ethanolic and aqueous extracts from leaves and bark of Uncaria tomentosa was studied, with particular attention to catalase activity (CAT - EC. 1.11.1.6). We observed that all tested extracts, at a concentration of 250 μg/mL were not toxic to erythrocyte catalase because they did not decreased its activity. Additionally, we investigated the protective effect of extracts on changes in CAT activity in the erythrocytes incubated with sodium salt of 2,4-dichlorophenoxyacetic acid (2,4-D-Na) and its metabolites i.e., 2,4-dichlorophenol (2,4-DCP) and catechol. Previous investigations showed that these chemicals decreased activity of erythrocyte catalase (Bukowska et al., 2000; Bukowska and Kowalska, 2004). The erythrocytes were divided into two portions. The first portion was incubated for 1 and 5h at 37°C with 2,4-D-Na, 2,4-DCP and catechol, and second portion was preincubated with extracts for 10 min and then incubated with xenobiotics for 1 and 5h. CAT activity was measured in the first and second portion of the erythrocytes. We found a protective effect of the extracts from U. tomentosa on the activity of catalase incubated with xenobiotics studied. Probably, phenolic compounds contained in U. tomentosa scavenged free radicals, and therefore protected active center (containing -SH groups) of catalase.
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Affiliation(s)
- Bożena Bukowska
- Department of Environmental Pollution Biophysics, Pomorska 141/143 St., 90-237 Łódź, Poland.
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Bors M, Sicińska P, Michałowicz J, Wieteska P, Gulewicz K, Bukowska B. Evaluation of the effect of Uncaria tomentosa extracts on the size and shape of human erythrocytes (in vitro). ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 33:127-134. [PMID: 22217608 DOI: 10.1016/j.etap.2011.11.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 10/28/2011] [Accepted: 11/07/2011] [Indexed: 05/31/2023]
Abstract
In this study, we continued our investigations concerning the interaction of Uncaria tomentosa extracts with the human erythrocytes. The analysis of the size and shape of the erythrocytes by means of flow cytometry and phase contrast microscopy was performed. We executed our experiments using ethanolic and aqueous extracts from the leaves and bark of U. tomentosa. Disturbances were observed in the size and shape of the erythrocytes incubated with ethanolic and aqueous extracts at the concentrations of 100 μg/mL and 250 μg/mL, respectively. The observed changes were probably related to the entry of polyphenolic compounds contained in U. tomentosa extracts into erythrocyte membrane. Externalization of phosphatidylserine on the erythrocytic surfaces was also noticed during incubation with extracts at concentration of 250 μg/mL. We concluded that all of the extracts examined induced changes in the erythrocyte membrane properties, whereas ethanolic extracts from bark induced the most significant changes. The possible binding of polyphenols to the erythrocyte surface may have accounted for the protective properties of extracts against haemolysis of RBCs, which was observed in our previous study (Bors et al., 2011), but considerable incorporation of polyphenols into cell membranes can result in disturbance of phosphatidylserine transport and changes in erythrocyte shape. Nevertheless the results of the investigations showed that considerable morphological changes appear only as a result of erythrocyte exposure to high concentrations (50 ppm and 100 ppm) of the extracts studied, thus they should not lead to clinical erythrocytic damage if recommended doses of U. tomentosa preparations are administrated.
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Affiliation(s)
- Milena Bors
- Department of Environmental Pollution Biophysics, Pomorska 141/143 St., 90-237 Łódź, Poland
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Garcia EJ, Oldoni TLC, Alencar SMD, Reis A, Loguercio AD, Grande RHM. Antioxidant activity by DPPH assay of potential solutions to be applied on bleached teeth. Braz Dent J 2012; 23:22-7. [DOI: 10.1590/s0103-64402012000100004] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 07/28/2011] [Indexed: 12/13/2022] Open
Abstract
The aim of this study was to assess, using the DPPH assay, the antioxidant activity of several substances that could be proposed to immediately revert the problems caused by bleaching procedures. The percentage of antioxidant activity (AA%) of 10% ascorbic acid solution (AAcidS), 10% ascorbic acid gel (AAcidG), 10% sodium ascorbate solution (SodAsS), 10% sodium ascorbate gel (SodAsG), 10% sodium bicarbonate (Bicarb), Neutralize® (NE), Desensibilize® (DES), catalase C-40 at 10 mg/mL (CAT), 10% alcohol solution of alpha-tocopherol (VitE), Listerine® (LIS), 0.12% chlorhexidine (CHX), Croton Lechleri (CL), 10 % aqueous solution of Uncaria Tomentosa (UT), artificial saliva (ArtS) and 0.05% sodium fluoride (NaF) was assessed in triplicate by 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) free radical assay. All substances exhibited antioxidant activity, except for CL. AAcidS, AAcidG and VitE exhibited the highest AA% (p<0.05). On the contrary, CHX, NE, LIS and NaF showed the lowest AA% (p<0.05). In conclusion, AAcidS, AAcidG, SodAsS, SodAsG and VitE presented the highest antioxidant activity among substances tested in this study. The DPPH assay provides an easy and rapid way to evaluate potential antioxidants.
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Farias I, do Carmo Araújo M, Zimmermann ES, Dalmora SL, Benedetti AL, Alvarez-Silva M, Asbahr ACC, Bertol G, Farias J, Schetinger MRC. Uncaria tomentosa stimulates the proliferation of myeloid progenitor cells. JOURNAL OF ETHNOPHARMACOLOGY 2011; 137:856-863. [PMID: 21771655 DOI: 10.1016/j.jep.2011.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 06/18/2011] [Accepted: 07/03/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Asháninkas, indigenous people of Peru, use cat's claw (Uncaria tomentosa) to restore health. Uncaria tomentosa has antioxidant activity and works as an agent to repair DNA damage. It causes different effects on cell proliferation depending on the cell type involved; specifically, it can stimulate the proliferation of myeloid progenitors and cause apoptosis of neoplastic cells. Neutropenia is the most common collateral effect of chemotherapy. For patients undergoing cancer treatment, the administration of a drug that stimulates the proliferation of healthy hematopoietic tissue cells is very desirable. It is important to assess the acute effects of Uncaria tomentosa on granulocyte-macrophage colony-forming cells (CFU-GM) and in the recovery of neutrophils after chemotherapy-induced neutropenia, by establishing the correlation with filgrastim (rhG-CSF) treatment to evaluate its possible use in clinical oncology. MATERIALS AND METHODS The in vivo assay was performed in ifosfamide-treated mice receiving oral doses of 5 and 15 mg of Uncaria tomentosa and intraperitoneal doses of 3 and 9 μg of filgrastim, respectively, for four days. Colony-forming cell (CFC) assays were performed with human hematopoietic stem/precursor cells (hHSPCs) obtained from umbilical cord blood (UCB). RESULTS Bioassays showed that treatment with Uncaria tomentosa significantly increased the neutrophil count, and a potency of 85.2% was calculated in relation to filgrastim at the corresponding doses tested. An in vitro CFC assay showed an increase in CFU-GM size and mixed colonies (CFU-GEMM) size at the final concentrations of 100 and 200 μg extract/mL. CONCLUSIONS At the tested doses, Uncaria tomentosa had a positive effect on myeloid progenitor number and is promising for use with chemotherapy to minimize the adverse effects of this treatment. These results support the belief of the Asháninkas, who have classified Uncaria tomentosa as a 'powerful plant'.
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Affiliation(s)
- Iria Farias
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
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Domingues A, Sartori A, Golim MA, Valente LMM, da Rosa LC, Ishikawa LLW, Siani AC, Viero RM. Prevention of experimental diabetes by Uncaria tomentosa extract: Th2 polarization, regulatory T cell preservation or both? JOURNAL OF ETHNOPHARMACOLOGY 2011; 137:635-642. [PMID: 21718770 DOI: 10.1016/j.jep.2011.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 04/26/2011] [Accepted: 06/12/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Uncaria tomentosa (Willd.) DC (Rubiaceae) is a species native to the Amazon rainforest and surrounding tropical areas that is endowed with immunomodulatory properties and widely used around the world. In this study we investigated the immunomodulatory potential of Uncaria tomentosa (UT) aqueous-ethanol extract on the progression of immune-mediated diabetes. MATERIALS AND METHODS C57BL/6 male mice were injected with MLDS (40 mg/kg) and orally treated with UT at 10-400mg/kg during 21 days. Control groups received MLDS alone or the respective dilution vehicle. Pancreatic mononuclear infiltrate and β-cell insulin content were analyzed by HE and immunohistochemical staining, respectively, and measured by digital morphometry. Lymphocyte immunophenotyping and cytokine production were determined by flow cytometry analysis. RESULTS Treating the animals with 50-400mg/kg of UT caused a significant reduction in the glycemic levels, as well as in the incidence of diabetes. The morphometric analysis of insulitis revealed a clear protective effect. Animals treated with UT at 400mg/kg presented a higher number of intact islets and a significant inhibition of destructive insulitis. Furthermore, a significant protection against the loss of insulin-secreting presented β-cells was achieved, as observed by a careful immunohistochemical evaluation. The phenotypic analysis indicated that the groups treated with higher doses (100-400mg/kg) presented CD4(+) and CD8(+) T-cell values similar to those observed in healthy animals. These same higher doses also increased the number of CD4(+)CD25(+)Foxp3(+) regulatory T-cells. Moreover, the extract modulated the production of Th1 and Th2, with increased levels of IL-4 and IL-5. CONCLUSIONS The extract was effective to prevent the progression of immune-mediated diabetes by distinct pathways.
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MESH Headings
- Animals
- Blood Glucose/drug effects
- Blood Glucose/metabolism
- Cat's Claw/chemistry
- Cell Polarity/drug effects
- Cells, Cultured
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/immunology
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Experimental/prevention & control
- Dose-Response Relationship, Drug
- Ethanol/chemistry
- Flow Cytometry
- Forkhead Transcription Factors/metabolism
- Hypoglycemic Agents/chemistry
- Hypoglycemic Agents/isolation & purification
- Hypoglycemic Agents/pharmacology
- Immunohistochemistry
- Immunophenotyping/methods
- Insulin/metabolism
- Insulin-Secreting Cells/drug effects
- Insulin-Secreting Cells/immunology
- Insulin-Secreting Cells/metabolism
- Insulin-Secreting Cells/pathology
- Interleukin-2 Receptor alpha Subunit/metabolism
- Interleukin-4/metabolism
- Interleukin-5/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Plant Extracts/chemistry
- Plant Extracts/isolation & purification
- Plant Extracts/pharmacology
- Plants, Medicinal
- Solvents/chemistry
- T-Lymphocytes, Regulatory/drug effects
- T-Lymphocytes, Regulatory/immunology
- Th2 Cells/drug effects
- Th2 Cells/immunology
- Time Factors
- Water/chemistry
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Affiliation(s)
- Alexandre Domingues
- Department of Pathology, Medical School, São Paulo State University (UNESP), Botucatu, São Paulo 18618-000, Brazil.
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Protective activity of the Uncaria tomentosa extracts on human erythrocytes in oxidative stress induced by 2,4-dichlorophenol (2,4-DCP) and catechol. Food Chem Toxicol 2011; 49:2202-11. [PMID: 21712061 DOI: 10.1016/j.fct.2011.06.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 05/19/2011] [Accepted: 06/03/2011] [Indexed: 11/22/2022]
Abstract
The purpose of this study was to evaluate the effect of the ethanolic and aqueous extracts of Uncaria tomentosa on human erythrocytes and additionally the assessment of protective effect of these extracts on hemolysis induction, hemoglobin oxidation, and changes in the level of reactive oxygen species (ROS) and lipid peroxidation, which were provoked by selected xenobiotics, i.e. 2,4-dichlorophenol (2,4-DCP) and catechol. All tested extracts, even at a very high concentration of 500 μg/ml were not toxic to the erythrocytes because they did not cause lipid peroxidation, increase methemoglobin and ROS levels nor provoked hemolysis. The results of this study also revealed protective effect of extracts of U. tomentosa. The extracts studied depleted the extent of hemoglobin oxidation and lipid peroxidation as well as decreased the level of ROS and hemolysis, which was provoked by 2,4-DCP. No protective activity of the extracts against catechol action, which is a precursor of semiquinones in cell was found. A difference in the effect of the extracts studied was observed. Ethanol-based extracts revealed more pronounced ability to inhibit oxidation processes in human erythrocytes.
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Gurrola-Díaz CM, García-López PM, Gulewicz K, Pilarski R, Dihlmann S. Inhibitory mechanisms of two Uncaria tomentosa extracts affecting the Wnt-signaling pathway. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2011; 18:683-690. [PMID: 21156346 DOI: 10.1016/j.phymed.2010.11.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 08/20/2010] [Accepted: 11/03/2010] [Indexed: 05/30/2023]
Abstract
Uncaria tomentosa ("uña de gato"; "cat's claw"), a woody vine native to the Amazon rainforest, is commonly used in South American traditional medicine to treat a broad spectrum of diseases. Although recent studies have reported anti-inflammatory and anti-proliferative properties of different alkaloids extracted from this plant, the underlying molecular mechanisms of these effects have not been elucidated yet. Our study investigates the inhibitory mechanisms of Uncaria tomentosa extracts on the Wnt-signaling pathway, a central regulator of development and tissue homoeostasis. A modified cell-based luciferase assay for screening inhibitors of the Wnt-pathway was used for analysis. Three cancer cell lines displaying different levels of aberrant Wnt-signaling activity were transfected with Wnt-signaling responsive Tcf-reporter plasmids and treated with increasing concentrations of two Uncaria tomentosa bark extracts. Wnt-signaling activity was assessed by luciferase activity and by expression of Wnt-responsive target genes. We show that both, an aqueous and an alkaloid-enriched extract specifically inhibit Wnt-signaling activity in HeLa, HCT116 and SW480 cancer cells resulting in reduced expression of the Wnt-target gene: c-Myc. The alkaloid-enriched extract (B/S(rt)) was found to be more effective than the aqueous extract (B/W(37)). The strongest effect was observed in SW480 cells, displaying the highest endogenous Wnt-signaling activity. Downregulation of Wnt-signaling by a dominant negative-TCF-4 variant in non-cancer cells rendered the cells insensitive towards treatment with B/S(rt). B/Srt was less toxic in non-cancer cells than in cancer cells. Our data suggest that the broad spectrum of pharmacological action of Uncaria tomentosa involves inhibition of the Wnt-signaling pathway, downstream of beta-Catenin activity.
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Affiliation(s)
- Carmen Magdalena Gurrola-Díaz
- Instituto de Enfermedades Crónico-Degenerativas, Centro Universitario de Ciencias de la Salud (CUCS), Departamento de Biología Molecular y Genómica, Universidad de Guadalajara, Guadalajara, Mexico
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