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Abdoli P, Vulin C, Lepiz M, Chase AB, Weihe C, Rodríguez-Verdugo A. Substrate complexity buffers negative interactions in a synthetic community of leaf litter degraders. FEMS Microbiol Ecol 2024; 100:fiae102. [PMID: 39020097 PMCID: PMC11289631 DOI: 10.1093/femsec/fiae102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 07/02/2024] [Accepted: 07/16/2024] [Indexed: 07/19/2024] Open
Abstract
Leaf litter microbes collectively degrade plant polysaccharides, influencing land-atmosphere carbon exchange. An open question is how substrate complexity-defined as the structure of the saccharide and the amount of external processing by extracellular enzymes-influences species interactions. We tested the hypothesis that monosaccharides (i.e. xylose) promote negative interactions through resource competition, and polysaccharides (i.e. xylan) promote neutral or positive interactions through resource partitioning or synergism among extracellular enzymes. We assembled a three-species community of leaf litter-degrading bacteria isolated from a grassland site in Southern California. In the polysaccharide xylan, pairs of species stably coexisted and grew equally in coculture and in monoculture. Conversely, in the monosaccharide xylose, competitive exclusion and negative interactions prevailed. These pairwise dynamics remained consistent in a three-species community: all three species coexisted in xylan, while only two species coexisted in xylose, with one species capable of using peptone. A mathematical model showed that in xylose these dynamics could be explained by resource competition. Instead, the model could not predict the coexistence patterns in xylan, suggesting other interactions exist during biopolymer degradation. Overall, our study shows that substrate complexity influences species interactions and patterns of coexistence in a synthetic microbial community of leaf litter degraders.
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Affiliation(s)
- Parmis Abdoli
- Department of Ecology and Evolutionary Biology, University of California Irvine, 321 Steinhaus Hall, Irvine, CA 92697, United States
| | - Clément Vulin
- Department of Fundamental Microbiology, University of Lausanne, Biophore, CH-1015 Lausanne, Switzerland
| | - Miriam Lepiz
- Department of Ecology and Evolutionary Biology, University of California Irvine, 321 Steinhaus Hall, Irvine, CA 92697, United States
| | - Alexander B Chase
- Department of Earth Sciences, Southern Methodist University, 3225 Daniel Avenue, Suite 207, Heroy Hall, Dallas, TX 75205, United States
| | - Claudia Weihe
- Department of Ecology and Evolutionary Biology, University of California Irvine, 321 Steinhaus Hall, Irvine, CA 92697, United States
| | - Alejandra Rodríguez-Verdugo
- Department of Ecology and Evolutionary Biology, University of California Irvine, 321 Steinhaus Hall, Irvine, CA 92697, United States
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Li C, Liu X, Li J, Lai J, Su J, Zhu B, Gao B, Li Y, Zhao M. Selenomethionine Inhibited HADV-Induced Apoptosis Mediated by ROS through the JAK-STAT3 Signaling Pathway. Nutrients 2024; 16:1966. [PMID: 38931321 PMCID: PMC11206631 DOI: 10.3390/nu16121966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/21/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024] Open
Abstract
Adenovirus (HAdV) can cause severe respiratory infections in children and immunocompromised patients. There is a lack of specific therapeutic drugs for HAdV infection, and the study of anti-adenoviral drugs has far-reaching clinical implications. Elemental selenium can play a specific role as an antioxidant in the human immune cycle by non-specifically binding to the amino acid methionine in body proteins. Methods: The antiviral mechanism of selenomethionine was explored by measuring cell membrane status, intracellular DNA status, cytokine secretion, mitochondrial membrane potential, and ROS production. Conclusions: Selenomethionine improved the regulation of ROS-mediated apoptosis by modulating the expression of Jak1/2, STAT3, and BCL-XL, which led to the inhibition of apoptosis. It is anticipated that selenomethionine will offer a new anti-adenoviral therapeutic alternative.
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Affiliation(s)
- Chuqing Li
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
| | - Xia Liu
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
| | - Jiali Li
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
| | - Jia Lai
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
| | - Jingyao Su
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
| | - Bing Zhu
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
| | - Buyun Gao
- School of Pharmacy, Fudan University, Shanghai 200437, China;
| | - Yinghua Li
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
| | - Mingqi Zhao
- Center Laboratory, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510120, China; (C.L.); (X.L.); (J.L.); (J.L.); (J.S.); (B.Z.)
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da Silva Cordeiro ML, de Queiroz Aquino-Martins VG, da Silva AP, Naliato GFS, Silveira ER, Theodoro RC, da Santos DYAC, Rocha HAO, Scortecci KC. Exploring the Antioxidant Potential of Talisia esculenta Using In Vitro and In Vivo Approaches. Nutrients 2023; 15:3855. [PMID: 37686887 PMCID: PMC10490396 DOI: 10.3390/nu15173855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
Medicinal plants, such as Talisia esculenta, are rich in antioxidant biomolecules, which are used in the treatment and prevention of many diseases. The antioxidant potential of T. esculenta extracts obtained from leaves and fruit peels was investigated using biochemical and 3T3 cell line assays as well as in vivo assays using an organism model Tenebrio molitor. Four extracts were tested: hydroethanolic extracts from leaves (HF) and from fruit peels (HC), and infusion extracts from leaves (IF) and from fruit peels (IC). The biochemical assays demonstrated an antioxidant capacity verified by TAC, reducing power, DPPH, and copper chelating assays. None of the extracts exhibited cytotoxicity against 3T3 cells, instead offering a protection against CuSO4-induced oxidative stress. The antioxidant activity observed in the extracts, including their role as free radical scavengers, copper chelators, and stress protectors, was further confirmed by T. molitor assays. The CLAE-DAD analysis detected phenolic compounds, including gallic acid, rutin, and quercitrin, as the main constituents of the samples. This study highlights that leaf and fruit peels extracts of T. esculenta could be effective protectors against ROS and copper-induced stress in cellular and invertebrate models, and they should be considered as coadjutants in the treatment and prevention of diseases related to oxidative stress and for the development of natural nutraceutical products.
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Affiliation(s)
- Maria Lúcia da Silva Cordeiro
- Laboratório de Transformação de Plantas e Análise em Microscopia (LTPAM), Departamento de Biologia Celular e Genética, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (M.L.d.S.C.); (V.G.d.Q.A.-M.); (A.P.d.S.)
- Programa de Pós-graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (G.F.S.N.); (R.C.T.); (H.A.O.R.)
| | - Verônica Giuliani de Queiroz Aquino-Martins
- Laboratório de Transformação de Plantas e Análise em Microscopia (LTPAM), Departamento de Biologia Celular e Genética, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (M.L.d.S.C.); (V.G.d.Q.A.-M.); (A.P.d.S.)
- Programa de Pós-graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (G.F.S.N.); (R.C.T.); (H.A.O.R.)
| | - Ariana Pereira da Silva
- Laboratório de Transformação de Plantas e Análise em Microscopia (LTPAM), Departamento de Biologia Celular e Genética, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (M.L.d.S.C.); (V.G.d.Q.A.-M.); (A.P.d.S.)
- Programa de Pós-graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (G.F.S.N.); (R.C.T.); (H.A.O.R.)
| | - Georggia Fatima Silva Naliato
- Programa de Pós-graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (G.F.S.N.); (R.C.T.); (H.A.O.R.)
- Instituto de Medicina Tropical, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59077-080, RN, Brazil
| | - Elielson Rodrigo Silveira
- Laboratório de Fitoquímica, Departamento de Botânica, Universidade de São Paulo (USP), São Paulo 05508-090, SP, Brazil; (E.R.S.); (D.Y.A.C.d.S.)
| | - Raquel Cordeiro Theodoro
- Programa de Pós-graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (G.F.S.N.); (R.C.T.); (H.A.O.R.)
- Instituto de Medicina Tropical, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59077-080, RN, Brazil
| | - Deborah Yara Alves Cursino da Santos
- Laboratório de Fitoquímica, Departamento de Botânica, Universidade de São Paulo (USP), São Paulo 05508-090, SP, Brazil; (E.R.S.); (D.Y.A.C.d.S.)
| | - Hugo Alexandre Oliveira Rocha
- Programa de Pós-graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (G.F.S.N.); (R.C.T.); (H.A.O.R.)
- Laboratório de Biotecnologia de Polímeros Naturais (BIOPOL), Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil
| | - Katia Castanho Scortecci
- Laboratório de Transformação de Plantas e Análise em Microscopia (LTPAM), Departamento de Biologia Celular e Genética, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (M.L.d.S.C.); (V.G.d.Q.A.-M.); (A.P.d.S.)
- Programa de Pós-graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal 59078-970, RN, Brazil; (G.F.S.N.); (R.C.T.); (H.A.O.R.)
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Song Z, Xiong X, Huang G. Ultrasound-assisted extraction and characteristics of maize polysaccharides from different sites. ULTRASONICS SONOCHEMISTRY 2023; 95:106416. [PMID: 37094477 PMCID: PMC10160789 DOI: 10.1016/j.ultsonch.2023.106416] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 04/08/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
Antitumor, antioxidant, hypoglycemic, and immunomodulatory properties are all exhibited by maize polysaccharides. With the increasing sophistication of maize polysaccharide extraction methods, enzymatic method is no longer limited to a single enzyme to extract polysaccharides, and is more often used in combination with ultrasound or microwave, or combination with different enzymes. Ultrasound has a good cell wall-breaking effect, making it easier to dislodge lignin and hemicellulose from the cellulose surface of the maize husk. The "water extraction and alcohol precipitation" method is the simplest but most resource- and time-consuming process. However, the "ultrasound-assisted extraction" and "microwave-assisted extraction" methods not only compensate for the shortcoming, but also increase the extraction rate. Herein, the preparation, structural analysis, and activities of maize polysaccharides were analyzed and discussed.
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Affiliation(s)
- Zongyan Song
- Key Laboratory of Carbohydrate Science and Engineering, Chongqing Normal University, Chongqing 401331, China
| | - Xiong Xiong
- Key Laboratory of Carbohydrate Science and Engineering, Chongqing Normal University, Chongqing 401331, China
| | - Gangliang Huang
- Key Laboratory of Carbohydrate Science and Engineering, Chongqing Normal University, Chongqing 401331, China.
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da Cruz Filho IJ, de Souza TP, dos Anjos Santos CÁ, de Morais Araújo MA, de Oliveira Moraes Miranda JF, de Oliveira Queirós ME, Filho DJNC, da Conceição Alves de Lima A, Marques DSC, do Carmo Alves de Lima M. Xylans extracted from branches and leaves of Protium puncticulatum: antioxidant, cytotoxic, immunomodulatory, anticoagulant, antitumor, prebiotic activities and their structural characterization. 3 Biotech 2023; 13:93. [PMID: 36845077 PMCID: PMC9944590 DOI: 10.1007/s13205-023-03506-1] [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: 11/03/2022] [Accepted: 01/31/2023] [Indexed: 02/23/2023] Open
Abstract
This work aimed to isolate and characterize xylans from branches and leaves of Protium puncticulatum, in addition to evaluating its in vitro biological and prebiotic potential. The results showed that the chemical structure of the obtained polysaccharides is similar being classified as homoxylans. The xylans presented an amorphous structure, in addition to being thermally stable and presenting a molecular weight close to 36 g/mol. With regard to biological activities, it was observed that xylans were able to promote low antioxidant activity (< 50%) in the different assays evaluated. The xylans also showed no toxicity against normal cells, in addition to being able to stimulate cells of the immune system and showing promise as anticoagulant agents. In addition to presenting promising antitumor activity in vitro. In assays of emulsifying activity, xylans were able to emulsify lipids in percentages below 50%. Regarding in vitro prebiotic activity, xylans were able to stimulate and promote the growth of different probiotics. Therefore, this study, in addition to being a pioneer, contributes to the application of these polysaccharides in the biomedical and food areas. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03506-1.
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Affiliation(s)
- Iranildo José da Cruz Filho
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
| | - Thammyris Pires de Souza
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
| | | | | | | | | | | | | | - Diego Santa Clara Marques
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
| | - Maria do Carmo Alves de Lima
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
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Synthesis and Anticancer Activity of Bagasse Xylan/Resveratrol Graft-Esterified Composite Nanoderivative. MATERIALS 2022; 15:ma15155166. [PMID: 35897598 PMCID: PMC9330801 DOI: 10.3390/ma15155166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/14/2022] [Accepted: 07/19/2022] [Indexed: 12/04/2022]
Abstract
Biomass materials are high-quality raw materials for the preparation of natural, green and highly active functional materials due to their rich active groups, wide sources and low toxicity. Bagasse xylan (BX) and resveratrol (Res) were used as raw materials to introduce ethylene glycol dimethacrylate (EGDMA) via grafting reaction to obtain the intermediate product BX/Res-g-EGDMA. The intermediate was esterified with 3-carboxyphenylboronic acid (3-CBA) to obtain the target product 3-CBA-BX/Res-g-EGDMA. The BX/Res-composite-modified nanoderivative with antitumor activity was synthesized with the nanoprecipitation method. The effects of the reaction conditions on the grafting rate (G) of BX/Res-g-EGDMA and the degree of substitution (DS) of 3-CBA-BX/Res-g-EGDMA were investigated using single-factor experiments. The results showed that under the optimized process conditions, G and DS reached 142.44% and 0.485, respectively. The product was characterized with FTIR, XRD, TG-FTC, 1H NMR and SEM, and its anticancer activity was simulated and tested. The results showed that 3-CBA-BX/Res-g-EGDMA had a spherical structure with an average particle size of about 100 nm and that its crystalline structure and thermal stability were different from those of the raw materials. In addition, 3-CBA-BX/Res-g-EGDMA showed the best docking activity with 2HE7 with a binding free energy of −6.3 kJ/mol. The inhibition rate of 3-CBA-BX/Res-g-EGDMA on MGC80-3 (gastric cancer cells) reached 36.71 ± 4.93%, which was 18 times higher than that of BX. Therefore, this material could be a potential candidate for biomedical applications.
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Dipterocarpol in Oleoresin of Dipterocarpus alatus Attributed to Cytotoxicity and Apoptosis-Inducing Effect. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103187. [PMID: 35630669 PMCID: PMC9145408 DOI: 10.3390/molecules27103187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/07/2022] [Accepted: 05/11/2022] [Indexed: 11/30/2022]
Abstract
Dipterocarpus alatus Roxb. ex G. Don is widely found in Southeast Asia. Its oleo-resin has reportedly been used in biodiesel production. Two different biodiesel production processes produce resinous byproducts, namely degumming (DG) and distillation (DT). Gas chromatography-mass spectrometry identified sesquiterpenes and triterpenes in oleo-resin, DG, and DT; and long-chain hydrocarbons in oleo-resin. High-performance liquid chromatography detected dipterocarpol as a marker compound, with the highest to lowest amounts detected in DG, DT, and oleo-resin, respectively. Oleo-resin, DG, and DT exerted more cytotoxicity than dipterocarpol, and melphalan, a chemotherapeutic drug. Oleo-resin, DG, and DT exerted cytotoxicity to a different degree in T cell leukemia (Jurkat), cervical adenocarcinoma (HeLa), and human hepatocellular carcinoma (HepG2) cells, while the highest selectivity was found in the Jurkat cells compared to the non-cancer Vero cells. Dipterocarpol exhibited the highest cytotoxicity in HepG2 cells and the lowest cytotoxicity in Jurkat cells. Oleo-resin, DG, and DT induced apoptosis in Jurkat cells. In oleo-resin, DG, and DT, dipterocarpol and other compounds may act in synergy leading to cytotoxicity and an apoptosis-inducing effect. Oleo-resin, DG, and DT could be potential sources for anticancer agents. Dipterocarpol could serve as a biomarker for follow ups on the anticancer activity of a sample from D. alatus.
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Current emerging trends in antitumor activities of polysaccharides extracted by microwave- and ultrasound-assisted methods. Int J Biol Macromol 2022; 202:494-507. [PMID: 35045346 DOI: 10.1016/j.ijbiomac.2022.01.088] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/01/2022] [Accepted: 01/12/2022] [Indexed: 01/13/2023]
Abstract
This overview highlighted the in vitro and in vivo antitumor effects of polysaccharides extracted by ultrasound- and microwave-assisted solvent extraction methods. The polysaccharide fragments with stronger antiproliferation, antitumoral, and anticarcinoma effects can be identified through purification, fractionation, and bio-analytical assessments. Most of the extracted glucan-based polysaccharides in a dose-dependent manner inhibited the growth of human cancer cell types with cell death-associated morphological changes. Glucans, glucogalactans, and pectins without any cytotoxicity on normal cells showed the antitumor potential by the apoptosis induction and the inhibition of their tumorigenesis, metastasis, and transformation. There is a significantly high association among antiproliferative activities, structural features (e.g., molecular weight, monosaccharide compositions, and contents of sulfate, selenium, and uronic acid), and other bio-functionalities (e.g., antiradical and antioxidant) of isolated polysaccharides. The evaluation of structure-activity relationships of antitumor polysaccharides is an intriguing step forward to develop highly potent anticancer pharmaceuticals and foods without any side effects.
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Zheng C, Liu T, Liu H, Wang J. Role of BCL-2 Family Proteins in Apoptosis and its Regulation by Nutrients. Curr Protein Pept Sci 2021; 21:799-806. [PMID: 31880257 DOI: 10.2174/1389203721666191227122252] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/26/2019] [Accepted: 08/28/2019] [Indexed: 02/08/2023]
Abstract
In the body, millions of cells die and proliferate each day to maintain normal function and cooperation of all tissues, organs, and systems. Thus, programmed cell death, or apoptosis, is critical to sustain growth, development, and body health. The vital role of B-cell leukemia/lymphoma-2 (BCL-2) family proteins in apoptosis has been identified. The BCL-2 family includes both pro- and antiapoptotic proteins, which are structurally and functionally related, containing up to four BCL-2 homology (BH) motifs (BH1-4). There are also some nutritional factors that regulate apoptosis via the BCL-2 family proteins. In this review, the BCL-2 family proteins and their apoptosis-inducing mechanism have been discussed, along with the nutrient factors that regulate apoptosis through the BCL-2 family proteins.
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Affiliation(s)
- Chen Zheng
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Ting Liu
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Huihui Liu
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Jing Wang
- Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
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Urtiga SCDC, Alves VMO, Melo CDO, Lima MND, Souza E, Cunha AP, Ricardo NMPS, Oliveira EE, Egito ESTD. Xylan microparticles for controlled release of mesalamine: Production and physicochemical characterization. Carbohydr Polym 2020; 250:116929. [PMID: 33049843 DOI: 10.1016/j.carbpol.2020.116929] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 08/06/2020] [Accepted: 08/06/2020] [Indexed: 10/23/2022]
Abstract
Xylan extracted from corn cobs was used to produce mesalamine-loaded xylan microparticles (XMP5-ASA) by cross-linking polymerization using a non-hazardous cross-linking agent. The microparticles were characterized by thermal analysis (DSC/TG), X-ray diffraction (XRD), Infrared spectroscopy (FTIR-ATR) and scanning electron microscopy (SEM). A comparative study of the in vitro drug release from XMP5-ASA and from gastro-resistant capsules filled with XMP5-ASA (XMPCAP5-ASA) or 5-ASA was also performed. NMR, FTIR-ATR, XRD and DSC/TG studies indicated molecularly dispersed drug in the microparticles with increment on drug stability. The release studies showed that XMPCAP5-ASA allowed more efficient drug retention in the simulated gastric fluid and a prolonged drug release lasting up to 24 h. XMPCAP5-ASA retained approximately 48 % of its drug content after 6 h on the drug release assay. Thus, the encapsulation of 5-ASA into xylan microparticles together with gastro-resistant capsules allowed a better release control of the drug during different simulated gastrointestinal medium.
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Affiliation(s)
- Silvana Cartaxo da Costa Urtiga
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Gen. Gustavo Cordeiro de Faria, 59010-180, Natal, Rio Grande do Norte, Brazil
| | | | - Camila de Oliveira Melo
- Federal University of Paraíba, Conjunto Presidente Castelo Branco III, 58033-455, João Pessoa, Paraíba, Brazil
| | - Marini Nascimento de Lima
- Department of Biology, State University of Paraíba, Horácio Trajano, 58070-450, João Pessoa, Paraíba, Brazil
| | - Ernane Souza
- University of Michigan, College of Pharmacy, 428 Church St., Ann Arbor, Michigan, 48109, USA
| | - Arcelina Pacheco Cunha
- Laboratory of Polymers and Materials Innovation, Department of Organic and Inorganic Chemistry, Sciences Center, Federal University of Ceará, Campus of Pici, 60455-760, Fortaleza, Ceará, Brazil
| | - Nágila Maria Pontes Silva Ricardo
- Laboratory of Polymers and Materials Innovation, Department of Organic and Inorganic Chemistry, Sciences Center, Federal University of Ceará, Campus of Pici, 60455-760, Fortaleza, Ceará, Brazil
| | - Elquio Eleamen Oliveira
- Department of Biology, State University of Paraíba, Horácio Trajano, 58070-450, João Pessoa, Paraíba, Brazil
| | - Eryvaldo Sócrates Tabosa do Egito
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Gen. Gustavo Cordeiro de Faria, 59010-180, Natal, Rio Grande do Norte, Brazil.
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Sharma K, Morla S, Khaire KC, Thakur A, Moholkar VS, Kumar S, Goyal A. Extraction, characterization of xylan from Azadirachta indica (neem) sawdust and production of antiproliferative xylooligosaccharides. Int J Biol Macromol 2020; 163:1897-1907. [DOI: 10.1016/j.ijbiomac.2020.09.086] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 09/11/2020] [Accepted: 09/13/2020] [Indexed: 12/18/2022]
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Silva Viana RL, Pereira Fidelis G, Jane Campos Medeiros M, Antonio Morgano M, Gabriela Chagas Faustino Alves M, Domingues Passero LF, Lima Pontes D, Cordeiro Theodoro R, Domingos Arantes T, Araujo Sabry D, Lanzi Sassaki G, Fagundes Melo-Silveira R, Rocha HAO. Green Synthesis of Antileishmanial and Antifungal Silver Nanoparticles Using Corn Cob Xylan as a Reducing and Stabilizing Agent. Biomolecules 2020; 10:E1235. [PMID: 32854282 PMCID: PMC7565311 DOI: 10.3390/biom10091235] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 08/10/2020] [Accepted: 08/19/2020] [Indexed: 12/17/2022] Open
Abstract
Corn cob is an agricultural byproduct that produces an estimated waste burden in the thousands of tons annually, but it is also a good source of xylan, an important bioactive polysaccharide. Silver nanoparticles containing xylan (nanoxylan) were produced using an environmentally friendly synthesis method. To do this, we extracted xylan from corn cobs using an ultrasound technique, which was confirmed by both chemical and NMR analyses. This xylan contained xylose, glucose, arabinose, galactose, mannose, and glucuronic acid in a molar ratio of 50:21:14:9:2.5:2.5, respectively. Nanoxylan synthesis was analyzed using UV-vis spectroscopy at kmax = 469 nm and Fourier transform infrared spectroscopy (FT-IR), which confirmed the presence of both silver and xylan in the nanoxylan product. Dynamic light scattering (DLS) and atomic force microscopy (AFM) revealed that the nanoxylan particles were ~102.0 nm in size and spherical in shape, respectively. DLS also demonstrated that nanoxylan was stable for 12 months and coupled plasma optical emission spectrometry (ICP-OES) showed that the nanoxylan particles were 19% silver. Nanoxylan reduced Leishmania amazonensis promastigote viability with a half maximal inhibitory concentration (IC50) value of 25 μg/mL, while xylan alone showed no effective. Additionally, nanoxylan exhibited antifungal activity against Candida albicans (MIC = 7.5 μg/mL), C. parapsilosis (MIC = 7.5 μg/mL), and Cryptococcus neoformans (MIC = 7.5 μg/mL). Taken together, these data suggest that it is possible to synthesize silver nanoparticles using xylan and that these nanoxylan exert improved antileishmanial and antifungal activities when compared to the untreated polysaccharide or silver nitrate used for their synthesis. Thus, nanoxylan may represent a promising new class of antiparasitic agents for use in the treatment of these microorganisms.
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Affiliation(s)
- Rony Lucas Silva Viana
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
| | - Gabriel Pereira Fidelis
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
| | - Mayara Jane Campos Medeiros
- Departamento de Química, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (M.J.C.M.); (D.L.P.)
| | - Marcelo Antonio Morgano
- Centro de Ciências e Qualidade dos Alimentos (CCQA), Instituto de Tecnologia dos Alimentos (ITAL), Campinas 13070-178, SP, Brazil;
| | - Monique Gabriela Chagas Faustino Alves
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
| | - Luiz Felipe Domingues Passero
- Instituto de Biociências, Universidade Estadual de São Paulo (Unesp), Praça Infante Dom Henrique, s/n, São Vicente 11330-900, SP, Brazil;
| | - Daniel Lima Pontes
- Departamento de Química, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (M.J.C.M.); (D.L.P.)
| | - Raquel Cordeiro Theodoro
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
| | - Thales Domingos Arantes
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
| | - Diego Araujo Sabry
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
| | | | - Raniere Fagundes Melo-Silveira
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
| | - Hugo Alexandre Oliveira Rocha
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Rio Grande do Norte 59078-970, Brazil; (R.L.S.V.); (G.P.F.); (M.G.C.F.A.); (R.C.T.); (T.D.A.); (D.A.S.); (R.F.M.-S.)
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Immunomodulatory Effects of Lycium barbarum Polysaccharide Extract and Its Uptake Behaviors at the Cellular Level. Molecules 2020; 25:molecules25061351. [PMID: 32188121 PMCID: PMC7145302 DOI: 10.3390/molecules25061351] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/10/2020] [Accepted: 03/12/2020] [Indexed: 12/30/2022] Open
Abstract
Lycium barbarum L. is a widely used functional food and medicinal herb in Asian countries. L. barbarium polysaccharides (LBP) are considered as one of the major medicinal components of L. barbarium fruit and exhibits a wide range of biological activities. Here, we investigated the immunomodulatory effects of LBP and its uptake behaviors at the cellular level. LBP was prepared by water extraction and ethanol precipitation, and divided into two fractions based on the molecular weight distribution by ultrafiltration (LBP > 10 kDa and LBP < 10 kDa). The physicochemical properties of LBP and LBP fractions were well characterized. The LBP > 10 kDa fraction greatly enhanced the viability of macrophages RAW264.7 cells and induced cell polarization, but had weak effects to other tested tumor cell lines and normal cell line. This fraction could regulate the production of NO, TNF-α, IL-6 and ROS in RAW264.7 cells, suggesting both pro-inflammatory and anti-inflammatory effects. The dye-labeled LBP could be internalized into all tested cell lines and accumulated in lysosomes. The internalization of LBP in RAW264.7 cells is mainly through the clathrin-mediated endocytosis pathway. The Caco-2 intestinal transport experiment demonstrated that the dye labeled LBP could be transported through the Caco-2 cell monolayer (mimic intestinal epithelium) through clathrin-mediated endocytosis. These results demonstrate the immunomodulatory effects of LBP and its effective uptake by macrophages and intestine.
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Brito TK, Silva Viana RL, Gonçalves Moreno CJ, da Silva Barbosa J, Lopes de Sousa Júnior F, Campos de Medeiros MJ, Melo-Silveira RF, Almeida-Lima J, de Lima Pontes D, Sousa Silva M, Oliveira Rocha HA. Synthesis of Silver Nanoparticle Employing Corn Cob Xylan as a Reducing Agent with Anti- Trypanosoma cruzi Activity. Int J Nanomedicine 2020; 15:965-979. [PMID: 32103950 PMCID: PMC7026134 DOI: 10.2147/ijn.s216386] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 10/09/2019] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Chagas disease, also known as American Trypanosomiasis, is caused by the protozoan Trypanosoma cruzi. It is occurring in Americas, including USA and Canada, and Europe and its current treatment involves the use of two drugs as follows: benznidazole (BNZ) and nifurtimox, which present high toxicity and low efficacy during the chronic phase of the disease, thus promoting the search for more effective therapeutic alternatives. Amongst them xylan, a bioactive polysaccharide, extracted from corn cob. METHODS Ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy (FITR), Raman spectroscopy, energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy, atomic force microscopy, plasma optical emission spectroscopy (ICP-OES), dynamic light scattering (DLS) have been used to characterize the silver-xylan nanoparticles (NX). Their cytotoxicity was evaluated with 3-bromo(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium (MTT) test. MTT and flow cytometry were used to ascertain the anti-Trypanosoma cruzi activity. RESULTS UV-Vis spectroscopy gave plasmon resonance ranging between 400 and 450 nm while FITC and Raman spectroscopy proved nano interface functionalized with xylan. ICP-OES data showed NX with xylan (81%) and silver (19%). EDS showed NX consisting of carbon (59.4%), oxygen (26.2%) and silver (4.8%) main elements. Spherical NX of 55 nm average size has been depicted with SEM and AFM, while DLS showed 102 ± 1.7 nm NX. The NX displayed negligible cytotoxicity (2000 µg/mL). NX (100 µg/mL) was more effective, regardless of experiment time, in affecting the ability of parasites to reduce MTT than BZN (100 µg/mL). In addition, NX (100 µg/mL) induced death of 95% of parasites by necrosis. CONCLUSION This is the first time silver nanoparticles are presented as an anti-Trypanosoma cruzi agent and the data point to the potential application of NX to new preclinical studies in vitro and in vivo.
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Affiliation(s)
- Talita Katiane Brito
- Postgraduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59012-570, Brazil
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Department of Biochemistry, Center of Biosciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
| | - Rony Lucas Silva Viana
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Department of Biochemistry, Center of Biosciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
- Postgraduate Program in Biochemistry, Federal University of Rio Grande do Norte UFRN), Natal, Rio Grande do Norte59078-970, Brazil
| | - Cláudia Jassica Gonçalves Moreno
- Postgraduate Program in Biochemistry, Federal University of Rio Grande do Norte UFRN), Natal, Rio Grande do Norte59078-970, Brazil
- Laboratory of Immunoparasitology, Department of Clinical and Toxicological Analysis, Health Sciences Center, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte59012-570, Brazil
| | - Jefferson da Silva Barbosa
- Postgraduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59012-570, Brazil
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Department of Biochemistry, Center of Biosciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
- Federal Institute of Education, Science and Technology of Rio Grande do Norte (IFRN), Natal, Rio Grande do Norte59500-000, Brazil
| | - Francimar Lopes de Sousa Júnior
- Laboratory of Chemistry of Coordination and Polymers (LQCPol), Institute of Chemistry, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
| | - Mayara Jane Campos de Medeiros
- Laboratory of Chemistry of Coordination and Polymers (LQCPol), Institute of Chemistry, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
| | - Raniere Fagundes Melo-Silveira
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Department of Biochemistry, Center of Biosciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
- Postgraduate Program in Biochemistry, Federal University of Rio Grande do Norte UFRN), Natal, Rio Grande do Norte59078-970, Brazil
| | - Jailma Almeida-Lima
- Postgraduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59012-570, Brazil
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Department of Biochemistry, Center of Biosciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
- Postgraduate Program in Biochemistry, Federal University of Rio Grande do Norte UFRN), Natal, Rio Grande do Norte59078-970, Brazil
| | - Daniel de Lima Pontes
- Laboratory of Chemistry of Coordination and Polymers (LQCPol), Institute of Chemistry, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
| | - Marcelo Sousa Silva
- Postgraduate Program in Biochemistry, Federal University of Rio Grande do Norte UFRN), Natal, Rio Grande do Norte59078-970, Brazil
- Laboratory of Immunoparasitology, Department of Clinical and Toxicological Analysis, Health Sciences Center, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte59012-570, Brazil
- Global Health and Tropical Medicine, Institute of Hygiene and Tropical Medicine, New University of Lisbon, Lisboa1349-008, Portugal
| | - Hugo Alexandre Oliveira Rocha
- Postgraduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59012-570, Brazil
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Department of Biochemistry, Center of Biosciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte59078-970, Brazil
- Postgraduate Program in Biochemistry, Federal University of Rio Grande do Norte UFRN), Natal, Rio Grande do Norte59078-970, Brazil
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Zhao F, Liu Q, Cao J, Xu Y, Pei Z, Fan H, Yuan Y, Shen X, Li C. A sea cucumber (Holothuria leucospilota) polysaccharide improves the gut microbiome to alleviate the symptoms of type 2 diabetes mellitus in Goto-Kakizaki rats. Food Chem Toxicol 2019; 135:110886. [PMID: 31626838 DOI: 10.1016/j.fct.2019.110886] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/01/2019] [Accepted: 10/10/2019] [Indexed: 12/13/2022]
Abstract
Diabetes mellitus has become a worldwide concern in recent years. In this study, the effect of Holothuria leucospilota polysaccharide (HLP) on type 2 diabetes mellitus (T2DM) was investigated in Goto-Kakizaki (GK) rats. The results showed that HLP significantly improved glucose intolerance and regulated blood lipid and hormone levels (p < 0.05). Pathological analysis showed that HLP repaired the impairments of the pancreas and colon in diabetic rats. In addition, a high dose of HLP (200 mg/kg) significantly upregulated the gene expression of peroxisome proliferator-activated receptor-α (PPAR-α), peroxisome proliferator-activated receptor-γ (PPAR-γ), phosphoinositide 3-kinase (PI3K), protein kinase B (PKB/AKT), glucose transporter-4 (GLUT4) and anti-apoptotic (Bcl-2), and downregulated the mRNA levels of pro-apoptotic (Bax) and cluster of differentiation 36 (CD36) in diabetic rats (p < 0.05). Furthermore, HLP treatment increased the short-chain fatty acid-producing bacteria and decreased the opportunistic bacterial pathogen in the feces of diabetic rats. These results demonstrated that HLP has the potential to ameliorate T2DM in GK rats.
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Affiliation(s)
- Fuqiang Zhao
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources of Ministry of Education, College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Qibing Liu
- School of Basic Medicine and Life Science, Hainan Medical University, Haikou, 571199, China
| | - Jun Cao
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources of Ministry of Education, College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Yunsheng Xu
- Marine Food Engineering Technology Research Center of Hainan Province, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Zhisheng Pei
- Marine Food Engineering Technology Research Center of Hainan Province, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Haofei Fan
- School of Basic Medicine and Life Science, Hainan Medical University, Haikou, 571199, China
| | - Yiqiong Yuan
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources of Ministry of Education, College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Xuanri Shen
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources of Ministry of Education, College of Food Science and Engineering, Hainan University, Haikou, 570228, China; Collaborative Innovation Center of Seafood Deep Processing, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, 116034, China
| | - Chuan Li
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources of Ministry of Education, College of Food Science and Engineering, Hainan University, Haikou, 570228, China; Collaborative Innovation Center of Seafood Deep Processing, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, 116034, China.
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Myrciaria tenella (DC.) O. Berg (Myrtaceae) Leaves as a Source of Antioxidant Compounds. Antioxidants (Basel) 2019; 8:antiox8080310. [PMID: 31443307 PMCID: PMC6720161 DOI: 10.3390/antiox8080310] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/18/2019] [Accepted: 07/19/2019] [Indexed: 01/18/2023] Open
Abstract
Myrciaria species are widely studied to identify their chemical composition and evaluate their biological activity. Since evidence supporting the potential antioxidant and antiproliferative activity of Myrciaria tenella is lacking, the aim of this work was to evaluate these activities in six different leaf extracts: hexane (CHE), chloroform (CCE), ethanolic (CEE), methanolic (CME), aqueous final (CFAE), and only aqueous (CAE). The presence of phenolic compounds, tannin, saponin, and ursolic acid was determined by thin layer chromatography (TLC). CEE, CME, and CFAE showed in vitro antioxidant activity at the initiation, propagation, and termination stages of oxidative damage. Moreover, no toxicity was observed in the 3T3 non-cancerous cell line. On the other hand, all extracts promoted cell death in the tumor cell lines human cervical adenocarcinoma cell line (HeLa) and human stomach gastric adenocarcinoma cell line (AGS). Based on these results, the effect of CEE on the AGS cell line was analyzed using flow cytometry, and necrosis and late apoptosis were observed. Finally, the Caenorhabditis elegans model showed that CEE was able to reduce the basal reactive oxygen species (ROS) level. Ultra-performance liquid chromatography (UPLC) analysis showed rutin as the major compound in CEE. Therefore, Myrciaria tenella fresh leaves may be potential sources of molecules possessing antioxidant and antiproliferative activities.
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Abstract
Background In clinical practice, many patients become multidrug resistant during chemotherapy, resulting in reduced or no healing effect. Therefore, the present study focused on bufalin, which is extracted from a traditional Chinese medicine named Chan Su (Venenum bufonis). We assessed the effect of bufalin in reversing K562/A02 cell drug resistance and inducing apoptosis, and explored the possible mechanism by which bufalin induces K562/A02 cell apoptosis. Material/Methods We used flow cytometry to evaluate intracellular ADM concentration, and RT-PCR and Western blot analysis were used to assess the effect of nuclear factor erythroid-2-related factor 2 (Nrf2) bufalin-related resistance gene expression. We used MTT and flow cytometry to detect apoptosis, and RT-PCR and Western blot were used to detect endoplasmic reticulum stress and apoptosis gene action. Results We found that bufalin can increase the concentration of Adriamycin (ADM) in K562/A02 cells by inhibiting the expression of Nrf2 and related drug resistance factors. The results showed that bufalin induced apoptosis of K562/A02 cells by the IRE1α/TRAF2/JNK/caspase-12 pathway. Conclusions These results suggest bufalin can reverse drug resistance in K562/A02 cells and that it induces apoptosis of K562/A02 cells by the IRE1α/TRAF2/JNK/caspase-12 pathway.
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Affiliation(s)
- Ying Xie
- Department of Blood Transfusion, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Xu Yan
- Department of Orthopedics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Ling Sun
- Department of Hematology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (mainland)
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