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Silva-Nolasco AM, de la Cruz-Morcillo MA, García-Martínez MM, Zalacain A, Gálvez BG, Carmona M. Immunomodulatory activity of argentatins A and B isolated from guayule. PLoS One 2024; 19:e0304713. [PMID: 38820477 PMCID: PMC11142701 DOI: 10.1371/journal.pone.0304713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 05/16/2024] [Indexed: 06/02/2024] Open
Abstract
Argentatins are secondary metabolites synthesized by guayule (Parthenium argentatum A. Gray) with numerous potential medical applications. In addition to inhibiting insect growth, they are endowed with several pharmacological properties including antimicrobial and antitumorigenic activity. However, their potential as immunomodulators remains unexplored. The aim of the present study was to investigate whether argentatins can modulate the function of the immune system. Human mesenchymal stem cells were treated with argentatins and the production of several anti- and proinflammatory cytokines was evaluated. The effect of argentatins on the polarization of CD4+ T-lymphocytes and macrophages was also assessed. Results demonstrated that argentatins can modulate the production of proinflammatory cytokines and the polarization of cellular phenotypes, including Th2 lymphocytes and M1 macrophages. These findings suggest that argentatins are promising therapeutic agents in autoimmune or allergic diseases, and open new perspectives for the investigation of argentatins in immune response and in the development of more targeted and effective immunomodulatory therapies.
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Affiliation(s)
- Aniela M. Silva-Nolasco
- Institute for Regional Development (IDR), Universidad de Castilla-La Mancha, Albacete, Spain
| | | | - M. Mercedes García-Martínez
- Instituto Técnico Agronómico Provincial (ITAP) S.A. Polígono Industrial Campollano, Albacete, Spain
- Escuela Técnica Superior de Ingenieros Agrónomos y de Montes y Biotecnología, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Amaya Zalacain
- Instituto Técnico Agronómico Provincial (ITAP) S.A. Polígono Industrial Campollano, Albacete, Spain
| | - Beatriz G. Gálvez
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Universidad Complutense de Madrid, Madrid, Spain
| | - Manuel Carmona
- Institute for Regional Development (IDR), Universidad de Castilla-La Mancha, Albacete, Spain
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2
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Hernández-Flandes A, Hernández-Ortega S, Ramírez-Apan T, Rocha-Zavaleta L, Silva-Jimenez N, Martínez-Vázquez M. Synthesis of Cycloartan-16β-ol from 16β 24R-Epoxy-Cycloartane and Their Cytotoxicity Evaluation Against Human Cancer Cell Lines. Chem Biodivers 2024; 21:e202301346. [PMID: 38520744 DOI: 10.1002/cbdv.202301346] [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: 09/03/2023] [Revised: 03/05/2024] [Accepted: 03/05/2024] [Indexed: 03/25/2024]
Abstract
It was found that Argentatins A and B triterpenoids make up approximately 20-30 % of the waste resin produced from the industrial processes to isolate rubber from P. argentatum. We have developed an efficient protocol for synthesizing cycloartane-16β-ol derivatives by opening the oxepane ring of argentatin B acetate (2) with BF3-OEt2. Although three new cycloartenol derivatives showed high cytotoxicity against PC-3 and HCT-15 cancer cell lines, nevertheless, the best results were obtained for (16β,24R) -(16,24-epoxy-cycloartan-2(1H)-ylidene) acetate (14), compound with intact oxepane ring. These results indicate that the substituents in the argentatin nucleus and a side chain account for the cytotoxic activity. However, according to the selectivity index (SI), 14 did not show selectivity activity to cancer cell lines over the HaCat noncancerous cell line. The compound 3β,16β-Dihydroxy-cycloartan-24-one (5), synthesized by oxepane opening, demonstrated high cytotoxic activity to cancer cell lines and showed a remarkable selectivity to cancer cell lines over the noncancerous ones. These results suggest that 5 could lead to the development of new anticancer compounds.
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Affiliation(s)
- Atzin Hernández-Flandes
- Departmento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México. C. Exterior, C. Universitaria, Ciudad de México, Coyoacán, 04510 DCMX, México
| | - Simón Hernández-Ortega
- Departmento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México. C. Exterior, C. Universitaria, Ciudad de México, Coyoacán, 04510 DCMX, México
| | - Teresa Ramírez-Apan
- Departmento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México. C. Exterior, C. Universitaria, Ciudad de México, Coyoacán, 04510 DCMX, México
| | - Leticia Rocha-Zavaleta
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas., Universidad Nacional Autónoma de México. C. Exterior, C. Universitaria, Ciudad de México, Coyoacán, 04510 DCMX, México
| | - Noemi Silva-Jimenez
- Departmento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México. C. Exterior, C. Universitaria, Ciudad de México, Coyoacán, 04510 DCMX, México
| | - Mariano Martínez-Vázquez
- Departmento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México. C. Exterior, C. Universitaria, Ciudad de México, Coyoacán, 04510 DCMX, México
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3
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Ponciano G, Dong N, Dong C, Breksa A, Vilches A, Abutokaikah MT, McMahan C, Holguin FO. Overexpression of tocopherol biosynthesis genes in guayule (Parthenium argentatum) reduces rubber, resin and argentatins content in stem and leaf tissues. PHYTOCHEMISTRY 2024; 222:114060. [PMID: 38522560 DOI: 10.1016/j.phytochem.2024.114060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 03/07/2024] [Accepted: 03/09/2024] [Indexed: 03/26/2024]
Abstract
Natural rubber produced in stems of the guayule plant (Parthenium argentatum) is susceptible to post-harvest degradation from microbial or thermo-oxidative processes, especially once stems are chipped. As a result, the time from harvest to extraction must be minimized to recover high quality rubber, especially in warm summer months. Tocopherols are natural antioxidants produced in plants through the shikimate and methyl-erythtiol-4-phosphate (MEP) pathways. We hypothesized that increased in vivo guayule tocopherol content might protect rubber from post-harvest degradation, and/or allow reduced use of chemical antioxidants during the extraction process. With the objective of enhancing tocopherol content in guayule, we overexpressed four Arabidopsis thaliana tocopherol pathway genes in AZ-2 guayule via Agrobacterium-mediated transformation. Tocopherol content was increased in leaf and stem tissues of most transgenic lines, and some improvement in thermo-oxidative stability was observed. Overexpression of the four tocopherol biosynthesis enzymes, however, altered other isoprenoid pathways resulting in reduced rubber, resin and argentatins content in guayule stems. The latter molecules are mainly synthesized from precursors derived from the mevalonate (MVA) pathway. Our results suggest the existence of crosstalk between the MEP and MVA pathways in guayule and the possibility that carbon metabolism through the MEP pathway impacts rubber biosynthesis.
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Affiliation(s)
- Grisel Ponciano
- United States Department of Agriculture-Agricultural Research Service-Western Regional Research Center, 800 Buchanan Street, Albany, CA, 94710, USA.
| | - Niu Dong
- United States Department of Agriculture-Agricultural Research Service-Western Regional Research Center, 800 Buchanan Street, Albany, CA, 94710, USA
| | - Chen Dong
- United States Department of Agriculture-Agricultural Research Service-Western Regional Research Center, 800 Buchanan Street, Albany, CA, 94710, USA
| | - Andrew Breksa
- United States Department of Agriculture-Agricultural Research Service-Western Regional Research Center, 800 Buchanan Street, Albany, CA, 94710, USA
| | - Ana Vilches
- United States Department of Agriculture-Agricultural Research Service-Western Regional Research Center, 800 Buchanan Street, Albany, CA, 94710, USA
| | - Maha T Abutokaikah
- Research Cores Program, New Mexico State University, P.O. Box 30001, Las Cruces, NM, 88003, USA
| | - Colleen McMahan
- United States Department of Agriculture-Agricultural Research Service-Western Regional Research Center, 800 Buchanan Street, Albany, CA, 94710, USA
| | - F Omar Holguin
- Department of Plant and Environmental Sciences, New Mexico State University, P.O. Box 30001, Las Cruces, NM, 88003, USA
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4
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García-Martínez MM, Gallego B, Latorre G, Carrión ME, De la Cruz-Morcillo MÁ, Zalacain A, Carmona M. Argentatin Content in Guayule Leaves ( Parthenium argentatum A. Gray). PLANTS (BASEL, SWITZERLAND) 2023; 12:2021. [PMID: 37653938 PMCID: PMC10221434 DOI: 10.3390/plants12102021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 09/02/2023]
Abstract
Approximately one-third of the waste biomass from the cultivation of guayule (Parthenium argentatum A. Gray) for natural rubber production is leaf tissue; however, whether it can be valorized is not known. Guayulins and argentatins are potential high-value products that can be recovered from guayule resin during rubber/latex processing. Argentatins are highly abundant in guayule stem resin; however, unlike the guayulins, their occurrence in leaves has not been investigated. The present study determined the content of argentatins and isoargentatins A and B in the leaves of a pure guayule accession (R1040) and two hybrids (CAL-1 and AZ-2) under conditions of irrigation and non-irrigation. The resin content in leaves was ~10%, which provides a suitable starting point for economic exploitation. The highest production of argentatins occurred in plants under irrigation, with yields of 4.2 and 3.6 kg ha-1 for R1040 and AZ-2, respectively. The R1040 accession had the highest percentage of resin and the greatest total argentatin content (24.5 g kg-1 dried leaf), principally due to the abundance of argentatin A. Contrastingly, CAL-1 consistently showed the lowest argentatin content based on dried leaf weight and production (0.6 kg ha-1). The substantial abundance of argentatins in guayule leaves suggests the potential for future exploitation.
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Affiliation(s)
- María Mercedes García-Martínez
- Instituto Técnico Agronómico Provincial de Albacete (ITAP), Parque empresarial Campollano, 2ª Avenida, 61, 02007 Albacete, Spain;
- E.T.S.I. Agronómica, de Montes y Biotecnología (ETSIAMB), Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, Avda. de España s/n, 02071 Albacete, Spain; (G.L.); (A.Z.)
| | - Beatriz Gallego
- Instituto de Toxicología de la Defensa, Hospital Central de la Defensa Gómez Ulla, Gta Ejército 1, 28047 Madrid, Spain;
| | - Guayente Latorre
- E.T.S.I. Agronómica, de Montes y Biotecnología (ETSIAMB), Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, Avda. de España s/n, 02071 Albacete, Spain; (G.L.); (A.Z.)
| | - María Engracia Carrión
- Institute for Regional Development (IDR), Food Quality Research Group, Universidad de Castilla-La Mancha Campus Universitario s/n, 02071 Albacete, Spain; (M.E.C.); (M.Á.D.l.C.-M.)
| | - Miguel Ángel De la Cruz-Morcillo
- Institute for Regional Development (IDR), Food Quality Research Group, Universidad de Castilla-La Mancha Campus Universitario s/n, 02071 Albacete, Spain; (M.E.C.); (M.Á.D.l.C.-M.)
| | - Amaya Zalacain
- E.T.S.I. Agronómica, de Montes y Biotecnología (ETSIAMB), Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, Avda. de España s/n, 02071 Albacete, Spain; (G.L.); (A.Z.)
| | - Manuel Carmona
- Institute for Regional Development (IDR), Food Quality Research Group, Universidad de Castilla-La Mancha Campus Universitario s/n, 02071 Albacete, Spain; (M.E.C.); (M.Á.D.l.C.-M.)
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5
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Singh CP, Sharma A, Sharma K, Darshani P, Katare A, Kumar D, Bharitkar YP. Two new cycloartane type triterpenes from Dysoxyllum binectariferum. Nat Prod Res 2023:1-8. [PMID: 36710465 DOI: 10.1080/14786419.2023.2172008] [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: 11/14/2022] [Revised: 01/03/2023] [Accepted: 01/14/2023] [Indexed: 01/31/2023]
Abstract
Dysoxyllum binectariferum is an important medicinal plant known for various biological activities like anti-inflammatory, CNS depressants, contraceptive, analgesic, immunomodulatory, antimalarial, antifeedant, leishmanicidal and antiviral. It is a rich source of rohitukine, a basic skeleton of flavopiridol. Phytochemical investigation of chloroform extracts of Dysoxyllum binectariferum leaves, lead to the isolation of beddomeilactone (1) and two new cycloartane type triterpenoids beddomeilactol (2) and binectarilactone-A (3) with modified A ring. Compounds were assessed for their in-vitro α-glucosidase inhibitory activity. Compound 1 was found to be most potent, showing IC50 of 17.99 ± 0.26 µg/ml which is comparable to the positive control acarbose.
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Affiliation(s)
- Chetan Paul Singh
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Akshima Sharma
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
| | - Kajal Sharma
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
| | - Priya Darshani
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Jadavpur, Kolkata
| | - Anil Katare
- Quality Management & Instrumentation Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
| | - Deepak Kumar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Jadavpur, Kolkata
| | - Yogesh P Bharitkar
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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6
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Nie X, Liu H, Ye W, Wei X, Fan L, Ma H, Li L, Xue W, Qi W, Wang YD, Chen WD. LRP5 promotes cancer stem cell traits and chemoresistance in colorectal cancer. J Cell Mol Med 2022; 26:1095-1112. [PMID: 34997691 PMCID: PMC8831954 DOI: 10.1111/jcmm.17164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 12/10/2021] [Accepted: 12/21/2021] [Indexed: 01/14/2023] Open
Abstract
The overactivation of canonical Wnt/β-catenin pathway and the maintenance of cancer stem cells (CSCs) are essential for the onset and malignant progression of most human cancers. However, their regulatory mechanism in colorectal cancer (CRC) has not yet been well demonstrated. Low-density lipoprotein receptor-related protein 5 (LRP5) has been identified as an indispensable co-receptor with frizzled family members for the canonical Wnt/β-catenin signal transduction. Herein, we show that activation of LRP5 gene promotes CSCs-like phenotypes, including tumorigenicity and drug resistance in CRC cells, through activating the canonical Wnt/β-catenin and IL-6/STAT3 signalling pathways. Clinically, the expression of LRP5 is upregulated in human CRC tissues and closely associated with clinical stages of patients with CRC. Further analysis showed silencing of endogenous LRP5 gene is sufficient to suppress the CSCs-like phenotypes of CRC through inhibiting these two pathways. In conclusion, our findings not only reveal a regulatory cross-talk between canonical Wnt/β-catenin signalling pathway, IL-6/STAT3 signalling pathway and CD133-related stemness that promote the malignant behaviour of CRC, but also provide a valuable target for the diagnosis and treatment of CRC.
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Affiliation(s)
- Xiaobo Nie
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Huiyang Liu
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Wenling Ye
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Xiaoyun Wei
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Lili Fan
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Han Ma
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Lanqing Li
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Wanting Xue
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Wenting Qi
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China
| | - Yan-Dong Wang
- State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, China
| | - Wei-Dong Chen
- Key Laboratory of Receptors-Mediated Gene Regulation and Drug Discovery, School of Basic Medical Sciences, People's Hospital of Hebi, Henan University, Henan, China.,Key Laboratory of Molecular Pathology, School of Basic Medical Science, Inner Mongolia Medical University, Inner Mongolia, China
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7
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RNASeq analysis of drought-stressed guayule reveals the role of gene transcription for modulating rubber, resin, and carbohydrate synthesis. Sci Rep 2021; 11:21610. [PMID: 34732788 PMCID: PMC8566568 DOI: 10.1038/s41598-021-01026-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 10/18/2021] [Indexed: 12/13/2022] Open
Abstract
The drought-adapted shrub guayule (Parthenium argentatum) produces rubber, a natural product of major commercial importance, and two co-products with potential industrial use: terpene resin and the carbohydrate fructan. The rubber content of guayule plants subjected to water stress is higher compared to that of well-irrigated plants, a fact consistently reported in guayule field evaluations. To better understand how drought influences rubber biosynthesis at the molecular level, a comprehensive transcriptome database was built from drought-stressed guayule stem tissues using de novo RNA-seq and genome-guided assembly, followed by annotation and expression analysis. Despite having higher rubber content, most rubber biosynthesis related genes were down-regulated in drought-stressed guayule, compared to well-irrigated plants, suggesting post-transcriptional effects may regulate drought-induced rubber accumulation. On the other hand, terpene resin biosynthesis genes were unevenly affected by water stress, implying unique environmental influences over transcriptional control of different terpene compounds or classes. Finally, drought induced expression of fructan catabolism genes in guayule and significantly suppressed these fructan biosynthesis genes. It appears then, that in guayule cultivation, irrigation levels might be calibrated in such a regime to enable tunable accumulation of rubber, resin and fructan.
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8
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Targeting cellular senescence in cancer by plant secondary metabolites: A systematic review. Pharmacol Res 2021; 177:105961. [PMID: 34718135 DOI: 10.1016/j.phrs.2021.105961] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/23/2021] [Accepted: 10/23/2021] [Indexed: 12/13/2022]
Abstract
Senescence suppresses tumor growth, while also developing a tumorigenic state in the nearby cells that is mediated by senescence-associated secretory phenotypes (SASPs). The dual function of cellular senescence stresses the need for identifying multi-targeted agents directed towards the promotion of cell senescence in cancer cells and suppression of the secretion of pro-tumorigenic signaling mediators in neighboring cells. Natural secondary metabolites have shown favorable anticancer responses in recent decades, as some have been found to target the senescence-associated mediators and pathways. Furthermore, phenolic compounds and polyphenols, terpenes and terpenoids, alkaloids, and sulfur-containing compounds have shown to be promising anticancer agents through the regulation of paracrine and autocrine pathways. Plant secondary metabolites are potential regulators of SASPs factors that suppress tumor growth through paracrine mediators, including growth factors, cytokines, extracellular matrix components/enzymes, and proteases. On the other hand, ataxia-telangiectasia mutated, ataxia-telangiectasia and Rad3-related, extracellular signal-regulated kinase/mitogen-activated protein kinase, phosphatidylinositol 3-kinase/Akt/mammalian target of rapamycin, nuclear factor-κB, Janus kinase/signal transducer and activator of transcription, and receptor tyrosine kinase-associated mediators are main targets of candidate phytochemicals in the autocrine senescence pathway. Such a regulatory role of phytochemicals on senescence-associated pathways are associated with cell cycle arrest and the attenuation of apoptotic/inflammatory/oxidative stress pathways. The current systematic review highlights the critical roles of natural secondary metabolites in the attenuation of autocrine and paracrine cellular senescence pathways, while also elucidating the chemopreventive and chemotherapeutic capabilities of these compounds. Additionally, we discuss current challenges, limitations, and future research indications.
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Xu YM, Madasu C, Liu MX, Wijeratne EMK, Dierig D, White B, Molnár I, Gunatilaka AAL. Cycloartane- and Lanostane-Type Triterpenoids from the Resin of Parthenium argentatum AZ-2, a Byproduct of Guayule Rubber Production. ACS OMEGA 2021; 6:15486-15498. [PMID: 34151127 PMCID: PMC8210430 DOI: 10.1021/acsomega.1c01714] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 05/21/2021] [Indexed: 06/13/2023]
Abstract
A total of 12 new cycloartane- and lanostane-type triterpenoids including 16-deoxyargentatin A (1), 16-deoxyisoargentatin A (2), 7-oxoisoargentatin A (3), 24-epi-argentatin H (4), 24-O-p-anisoylargentatin C (5), 24-O-trans-cinnamoylargentatin C (6), 16-dehydroargentatin C (7), 16,17(20)-didehydroargentatin C (8), isoargentatin C (9), isoargentatin H (10), 3-epi-quisquagenin (11), and isoquisquagenin (12) together with 10 known triterpenoids (13-22) were isolated from the resin of Parthenium argentatum AZ-2 obtained as a byproduct of Bridgestone guayule rubber production. The structures of new triterpenoids 1-12 and argentatin H (13), which has previously been characterized as its diacetate (23), were elucidated by extensive analysis of their spectroscopic data and chemical conversions, and the known compounds 14-22 were identified by comparison of their spectroscopic data with those reported. Of these, 13, 14, and 18 exhibited weak cytotoxic activity for several cancer cell lines.
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Affiliation(s)
- Ya-ming Xu
- Southwest
Center for Natural Products Research, School of Natural Resources
and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Chandrashekhar Madasu
- Southwest
Center for Natural Products Research, School of Natural Resources
and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Manping X. Liu
- Southwest
Center for Natural Products Research, School of Natural Resources
and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - E. M. Kithsiri Wijeratne
- Southwest
Center for Natural Products Research, School of Natural Resources
and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - David Dierig
- Guayule
Research, Bridgestone Americas, Inc., 4140 West Harmon Road, Eloy, Arizona 85131, United States
| | - Bob White
- Guayule
Research, Bridgestone Americas, Inc., 4140 West Harmon Road, Eloy, Arizona 85131, United States
| | - István Molnár
- Southwest
Center for Natural Products Research, School of Natural Resources
and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - A. A. Leslie Gunatilaka
- Southwest
Center for Natural Products Research, School of Natural Resources
and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
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10
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Dembitsky VM, Gloriozova TA, Poroikov VV. Antitumor Profile of Carbon-Bridged Steroids (CBS) and Triterpenoids. Mar Drugs 2021; 19:324. [PMID: 34205074 PMCID: PMC8228860 DOI: 10.3390/md19060324] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/01/2021] [Accepted: 06/01/2021] [Indexed: 12/12/2022] Open
Abstract
This review focuses on the rare group of carbon-bridged steroids (CBS) and triterpenoids found in various natural sources such as green, yellow-green, and red algae, marine sponges, soft corals, ascidians, starfish, and other marine invertebrates. In addition, this group of rare lipids is found in amoebas, fungi, fungal endophytes, and plants. For convenience, the presented CBS and triterpenoids are divided into four groups, which include: (a) CBS and triterpenoids containing a cyclopropane group; (b) CBS and triterpenoids with cyclopropane ring in the side chain; (c) CBS and triterpenoids containing a cyclobutane group; (d) CBS and triterpenoids containing cyclopentane, cyclohexane or cycloheptane moieties. For the comparative characterization of the antitumor profile, we have added several semi- and synthetic CBS and triterpenoids, with various additional rings, to identify possible promising sources for pharmacologists and the pharmaceutical industry. About 300 CBS and triterpenoids are presented in this review, which demonstrate a wide range of biological activities, but the most pronounced antitumor profile. The review summarizes biological activities both determined experimentally and estimated using the well-known PASS software. According to the data obtained, two-thirds of CBS and triterpenoids show moderate activity levels with a confidence level of 70 to 90%; however, one third of these lipids demonstrate strong antitumor activity with a confidence level exceeding 90%. Several CBS and triterpenoids, from different lipid groups, demonstrate selective action on different types of tumor cells such as renal cancer, sarcoma, pancreatic cancer, prostate cancer, lymphocytic leukemia, myeloid leukemia, liver cancer, and genitourinary cancer with varying degrees of confidence. In addition, the review presents graphical images of the antitumor profile of both individual CBS and triterpenoids groups and individual compounds.
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Affiliation(s)
- Valery M. Dembitsky
- Centre for Applied Research, Innovation and Entrepreneurship, Lethbridge College, 3000 College Drive South, Lethbridge, AB T1K 1L6, Canada
| | - Tatyana A. Gloriozova
- Institute of Biomedical Chemistry, Bldg. 8, 10 Pogodinskaya Str., 119121 Moscow, Russia; (T.A.G.); (V.V.P.)
| | - Vladimir V. Poroikov
- Institute of Biomedical Chemistry, Bldg. 8, 10 Pogodinskaya Str., 119121 Moscow, Russia; (T.A.G.); (V.V.P.)
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A new horizon for the steroidal alkaloid cyclovirobuxine D (huangyangning) and analogues: Anticancer activities and mechanism of action. JOURNAL OF TRADITIONAL CHINESE MEDICAL SCIENCES 2020. [DOI: 10.1016/j.jtcms.2020.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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