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Elattar MM, Hammoda HM, Ghareeb DA, Abdulmalek SA, Abdelrahim FA, Seif IAK, Dawood HM, Darwish RS. Insights into bioactive constituents of onion (Allium cepa L.) waste: a comparative metabolomics study enhanced by chemometric tools. BMC Complement Med Ther 2024; 24:271. [PMID: 39010091 PMCID: PMC11250982 DOI: 10.1186/s12906-024-04559-2] [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: 10/29/2023] [Accepted: 06/20/2024] [Indexed: 07/17/2024] Open
Abstract
BACKGROUND Onion waste was reported to be a valuable source of bioactive constituents with potential health-promoting benefits. This sparked a surge of interest among scientists for its valorization. This study aims to investigate the chemical profiles of peel and root extracts of four onion cultivars (red, copper-yellow, golden yellow and white onions) and evaluate their erectogenic and anti-inflammatory potentials. METHODS UPLC-QqQ-MS/MS analysis and chemometric tools were utilized to determine the chemical profiles of onion peel and root extracts. The erectogenic potential of the extracts was evaluated using the PDE-5 inhibitory assay, while their anti-inflammatory activity was determined by identifying their downregulating effect on the gene expression of IL-6, IL-1β, IFN-γ, and TNF-α in LPS-stimulated WBCs. RESULTS A total of 103 metabolites of diverse chemical classes were identified, with the most abundant being flavonoids. The organ's influence on the chemical profiles of the samples outweighed the influence of the cultivar, as evidenced by the close clustering of samples from the same organ compared to the distinct separation of root and peel samples from the same cultivar. Furthermore, the tested extracts demonstrated promising PDE-5 and anti-inflammatory potentials and effectively suppressed the upregulation of pro-inflammatory markers in LPS-stimulated WBCs. The anti-inflammatory activities exerted by peel samples surpassed those of root samples, highlighting the importance of selecting the appropriate organ to maximize activity. The main metabolites correlated with PDE-5 inhibition were cyanidin 3-O-(malonyl-acetyl)-glucoside and quercetin dimer hexoside, while those correlated with IL-1β inhibition were γ-glutamyl-methionine sulfoxide, γ-glutamyl glutamine, sativanone, and stearic acid. Taxifolin, 3'-hydroxymelanettin, and oleic acid were highly correlated with IL-6 downregulation, while quercetin 4'-O-glucoside, isorhamnetin 4'-O-glucoside, and p-coumaroyl glycolic acid showed the highest correlation to IFN-γ and TNF-α inhibition. CONCLUSION This study provides a fresh perspective on onion waste as a valuable source of bioactive constituents that could serve as the cornerstone for developing new, effective anti-PDE-5 and anti-inflammatory drug candidates.
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Affiliation(s)
- Mariam M Elattar
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt
| | - Hala M Hammoda
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt
| | - Doaa A Ghareeb
- Bio-screening and Preclinical Trial Lab, Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
- Center of Excellence for Drug Preclinical Studies (CE-DPS), Pharmaceutical and Fermentation Industry Development Center, City of Scientific Research & Technological Applications (SRTA- city), New Borg El Arab, Alexandria, Egypt
- Research Projects Unit, Pharos University, Alexandria, Egypt
| | - Shaymaa A Abdulmalek
- Bio-screening and Preclinical Trial Lab, Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Fatma A Abdelrahim
- Bio-screening and Preclinical Trial Lab, Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Inas A K Seif
- Bio-screening and Preclinical Trial Lab, Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Hend M Dawood
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt
| | - Reham S Darwish
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt.
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Gholami F, Seyedalipour B, Heidari-Kalvani N, Nabi-Afjadi M, Yaghoubzad-Maleki M, Fathi Z, Alipourfard I, Barjesteh F, Bahreini E. Catharanthine, an anticancer vinca alkaloid: an in silico and in vitro analysis of the autophagic system as the major mechanism of cell death in liver HepG2 cells. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03191-8. [PMID: 38856913 DOI: 10.1007/s00210-024-03191-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 05/27/2024] [Indexed: 06/11/2024]
Abstract
Catharanthine, a component of the anticancer drug vinblastine along with vindoline, disrupts the cell cycle by interfering with mitotic spindle formation. Apart from their antioxidant properties, vinca alkaloids like catharanthine inhibit phosphodiesterase activity and elevate intracellular cAMP levels. The aim of this study was to investigate how catharantine affects apoptosis and autophagy. This study conducted experiments on HepG2 liver carcinoma cells with varying doses of catharanthine to evaluate cell death rates and viability and determine the IC50 concentration via MTT assays. The apoptotic and autophagic effects of catharanthine were assessed using flow cytometry with annexin V and PI staining, while the expression of autophagy-related genes was analyzed through quantitative PCR. Additionally, molecular docking and molecular dynamics simulations were employed to further investigate catharanthine's impact on autophagy mechanisms. The study showed that catharanthine reduced oxidative stress and triggered apoptosis in HepG2 cells in a dose-dependent manner. Catharanthine also upregulated the expression of autophagy-related genes like LC3, Beclin1, and ULK1. Notably, catharanthine increased sirtuin-1 levels, a known autophagy inducer, while decreasing Akt expression compared to untreated cells. Molecular docking results indicated rapamycin had a stronger binding affinity with FRB (-10.7 KJ/mol-1) than catharanthine (-7.3 KJ/mol-1). Additionally, molecular dynamics simulations revealed that catharanthine interacted effectively with the FRB domain of mTOR, displaying stability and a strong binding affinity, although not as potent as rapamycin. In summary, besides its cytotoxic and pro-apoptotic effects, catharanthine activates autophagy signaling pathways and induces autophagic necrosis by inhibiting mTOR.
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Affiliation(s)
- Farnoosh Gholami
- Department of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
| | - Bagher Seyedalipour
- Department of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
| | - Nafiseh Heidari-Kalvani
- Department of Biochemistry, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohsen Nabi-Afjadi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mohammad Yaghoubzad-Maleki
- Division of Biochemistry, Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Zeinab Fathi
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Iraj Alipourfard
- Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Fereshte Barjesteh
- Department of Biochemistry, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Elham Bahreini
- Department of Biochemistry, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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Landucci E, Ribaudo G, Anyanwu M, Oselladore E, Giannangeli M, Mazzantini C, Lana D, Giovannini MG, Memo M, Pellegrini-Giampietro DE, Gianoncelli A. Virtual Screening-Accelerated Discovery of a Phosphodiesterase 9 Inhibitor with Neuroprotective Effects in the Kainate Toxicity In Vitro Model. ACS Chem Neurosci 2023; 14:3826-3838. [PMID: 37726213 PMCID: PMC10587872 DOI: 10.1021/acschemneuro.3c00431] [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: 06/23/2023] [Accepted: 09/07/2023] [Indexed: 09/21/2023] Open
Abstract
In the central nervous system, some specific phosphodiesterase (PDE) isoforms modulate pathways involved in neuronal plasticity. Accumulating evidence suggests that PDE9 may be a promising therapeutic target for neurodegenerative diseases. In the current study, computational techniques were used to identify a nature-inspired PDE9 inhibitor bearing the scaffold of an isoflavone, starting from a database of synthetic small molecules using a ligand-based approach. Furthermore, docking studies supported by molecular dynamics investigations allowed us to evaluate the features of the ligand-target complex. In vitro assays confirmed the computational results, showing that the selected compound inhibits the enzyme in the nanomolar range. Additionally, we evaluated the expression of gene and protein levels of PDE9 in organotypic hippocampal slices, observing an increase following exposure to kainate (KA). Importantly, the PDE9 inhibitor reduced CA3 damage induced by KA in a dose-dependent manner in organotypic hippocampal slices. Taken together, these observations strongly support the potential of the identified nature-inspired PDE9 inhibitor and suggest that such a molecule could represent a promising lead compound to develop novel therapeutic tools against neurological diseases..
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Affiliation(s)
- Elisa Landucci
- Department
of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Firenze, Firenze 50139, Italy
| | - Giovanni Ribaudo
- Department
of Molecular and Translational Medicine, University of Brescia, Brescia 25123, Italy
| | - Margrate Anyanwu
- Department
of Molecular and Translational Medicine, University of Brescia, Brescia 25123, Italy
| | - Erika Oselladore
- Department
of Molecular and Translational Medicine, University of Brescia, Brescia 25123, Italy
| | - Matteo Giannangeli
- Department
of Molecular and Translational Medicine, University of Brescia, Brescia 25123, Italy
| | - Costanza Mazzantini
- Department
of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Firenze, Firenze 50139, Italy
| | - Daniele Lana
- Department
of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Firenze, Firenze 50139, Italy
| | - Maria Grazia Giovannini
- Department
of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Firenze, Firenze 50139, Italy
| | - Maurizio Memo
- Department
of Molecular and Translational Medicine, University of Brescia, Brescia 25123, Italy
| | | | - Alessandra Gianoncelli
- Department
of Molecular and Translational Medicine, University of Brescia, Brescia 25123, Italy
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Shai K, Lebelo SL, Ng'ambi JW, Mabelebele M, Sebola NA. A review of the possibilities of utilising medicinal plants in improving the reproductive performance of male ruminants. ALL LIFE 2022. [DOI: 10.1080/26895293.2022.2147225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- K. Shai
- Department of Agricultural Economics and Animal Production, University of Limpopo, Sovenga, South Africa
| | - S. L. Lebelo
- Department of Life and Consumer Sciences, College of Agriculture and Environmental Sciences, University of South Africa, Pretoria, South Africa
| | - J. W. Ng'ambi
- Department of Agricultural Economics and Animal Production, University of Limpopo, Sovenga, South Africa
| | - M. Mabelebele
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Pretoria, South Africa
| | - N. A. Sebola
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Pretoria, South Africa
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Ahmad N, Lesa KN, Sudarmanto A, Fakhrudin N, Ikawati Z. The role of Phosphodiesterase-1 and its natural product inhibitors in Alzheimer's disease: A review. Front Pharmacol 2022; 13:1070677. [PMID: 36618909 PMCID: PMC9812569 DOI: 10.3389/fphar.2022.1070677] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/02/2022] [Indexed: 12/24/2022] Open
Abstract
Phosphodiesterase-1 (PDE1) is a versatile enzyme that has surprisingly received considerable attention as a possible therapeutic target in Alzheimer's disease (AD) because it maintains the homeostasis of 3',5'-cyclic adenosine monophosphate (cAMP) and 3',5'-cyclic guanosine monophosphate (cGMP) in the brain. 3',5'-cyclic adenosine monophosphate and 3',5'-cyclic guanosine monophosphate are the two key second messengers that regulate a broad range of intracellular processes and neurocognitive functions, specifically memory and cognition, associated with Alzheimer's disease. However, the lack of available selective drugs on the market poses challenges to identifying the beneficial effects of natural products. The present review focuses on Phosphodiesterase-1 and its isoforms, splicing variants, location, distribution, and function; the role of Phosphodiesterase-1 inhibitors in Alzheimer's disease; and the use of vinpocetine and natural products as specific Phosphodiesterase-1 inhibitors. Moreover, it aims to provide ongoing updates, identify research gaps, and present future perspectives. This review indicates the potential role of Phosphodiesterase-1 inhibitors in the treatment of neurodegenerative disorders, such as Alzheimer's disease. Certain clinical trials on the alleviation of Alzheimer's disease in patients are still in progress. Among de novo outcomes, the employment of Phosphodiesterase-1 inhibitors to treat Alzheimer's disease is an important advancement given the absence of particular therapies in the pipeline for this highly prevalent disease. To sum up, Phosphodiesterase-1 inhibition has been specifically proposed as a critical therapeutic approach for Alzheimer's disease. This study provides a comprehensive review on the biological and pharmacological aspects of Phosphodiesterase-1, its role on the Alzheimer's diseases and its significance as Alzheimer's disease therapeutic target in drug discovery from natural products. This review will help clinical trials and scientific research exploring new entities for the treatment and prevention of Alzheimer's disease.
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Affiliation(s)
- Nazir Ahmad
- Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia
| | - Kaisun Nesa Lesa
- Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Ari Sudarmanto
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia
| | - Nanang Fakhrudin
- Department of Pharmaceutical Biology, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia,Medicinal Plants and Natural Products Research Center, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia,*Correspondence: Nanang Fakhrudin,
| | - Zullies Ikawati
- Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia
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Aboelhadid SM, Abdel-Baki AAS, Hassan KM, Arafa WM, Abdel-Tawab H, Al-Quraishy S, Hassan AO, Moawad UK, Ahmed O, Kamel AA. Role of antioxidant activity of essential oils in their acaricidal activities against Rhipicephalus annulatus. EXPERIMENTAL & APPLIED ACAROLOGY 2022; 88:209-224. [PMID: 36348156 DOI: 10.1007/s10493-022-00742-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Essential oils of Origanum majorana and Satureja thymbra as well as carvacrol are natural products that are known to have potent antioxidant activities. The current study was designed to investigate the role of the antioxidant properties of these natural products in their acaricidal activities against Rhipicephalus annulatus larvae. The synergistic and/or antagonistic effects of the addition of vitamins E and C and hydrogen peroxide (H2O2) to these natural products were also evaluated. Larval packet tests were used to evaluate the acaricidal activities against the larvae of R. annulatus. The antioxidant effectiveness of these products was determined by a DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging assay. The addition of vitamin E at 100 mg/mL to O. majorana and S. thymbra decreased the concentrations required to achieve the death of half of the larvae (LC50) to 0.44 and 0.47%, respectively. The combination of O. majorana and S. thymbra attained the LC50 at 1.54% which was decreased to 0.69% after addition of vitamin E. Also, the addition of vitamin E to carvacrol reduced the LC50 to 0.27%. The total antioxidant activity of these natural products increased significantly in presence of vitamin E. The addition of H2O2 inhibited the acaricidal activity of all tested materials, especially at low concentrations. All treatments induced an increase in lipid peroxidation, whereas carvacrol-treated larvae revealed the lowest values for the superoxide dismutase. Glutathione peroxidase and catalase activity decreased in larvae treated with S. thymbra combined with vitamin E. In conclusion, the addition of vitamins E and C increased the acaricidal activities of the tested compounds, whereas the addition of H2O2 decreased these activities. The antioxidant activities of essential oils and their active components may play an important role in mediating their acaricidal activities.
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Affiliation(s)
- Shawky M Aboelhadid
- Parasitology Department, Faculty of Veterinary Medicine, Beni-Suef University, 62511, Beni-Suef, Egypt.
| | | | - Khaled M Hassan
- Department of Parasitology, Beni-Suef Laboratory, Animal Health Research Institute (AHRI), Agriculture Research center (ARC), Beni-Suef, Egypt
| | - Waleed M Arafa
- Parasitology Department, Faculty of Veterinary Medicine, Beni-Suef University, 62511, Beni-Suef, Egypt
| | - Heba Abdel-Tawab
- Zoology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Saleh Al-Quraishy
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed O Hassan
- Department of Medicine, Washington University School of Medicine, 63110, St. Louis, MO, USA
| | - Usama K Moawad
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Beni-Suef University, 62511, Beni-Suef, Egypt
| | - Osama Ahmed
- Zoology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Asmaa A Kamel
- Parasitology Department, Faculty of Veterinary Medicine, Beni-Suef University, 62511, Beni-Suef, Egypt
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Bisht N, Gupta A, Awasthi P, Goel A, Chandran D, Sharma N, Singh N. Development of a rapid LC-MS/MS method for the simultaneous quantification of various flavonoids, isoflavonoids, and phytohormones extracted from Medicago truncatula leaves. J LIQ CHROMATOGR R T 2022. [DOI: 10.1080/10826076.2022.2040028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Neema Bisht
- Advanced Technology Platform Centre, Regional Centre for Biotechnology, Faridabad, India
| | - Arunima Gupta
- Laboratory of Plant-Microbe Interactions, Regional Centre for Biotechnology, Faridabad, India
| | - Pallavi Awasthi
- Medicinal and Process Chemistry, Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Atul Goel
- Medicinal and Process Chemistry, Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Divya Chandran
- Laboratory of Plant-Microbe Interactions, Regional Centre for Biotechnology, Faridabad, India
| | - Neha Sharma
- Advanced Technology Platform Centre, Regional Centre for Biotechnology, Faridabad, India
| | - Nirpendra Singh
- Advanced Technology Platform Centre, Regional Centre for Biotechnology, Faridabad, India
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8
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Potent In Vitro Phosphodiesterase 1 Inhibition of Flavone Isolated from Pistacia integerrima Galls. BIOMED RESEARCH INTERNATIONAL 2022; 2022:6116003. [PMID: 35083331 PMCID: PMC8786535 DOI: 10.1155/2022/6116003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/28/2021] [Accepted: 12/24/2021] [Indexed: 12/02/2022]
Abstract
To prospect an isozyme-specific, effective inhibitor against the physiologically-crucial enzyme phosphodiesterase 1 (PDE1), phytochemicals from Pistacia integerrima galls were screened. The chloroform fraction of gall extract was subjected to column chromatographic which led to the isolation of compound 1, elucidated to be 5-hydroxy-7-methoxy-2-(4-methoxyphenyl)-4H-chromen-4-one (a flavone). In vitro and in silico PDE1 inhibitory activity of the compound 1 was investigated. EDTA, a known PDE1 inhibitor, was used as the reference. The flavone exhibited in vitro attenuation towards snake venom PDE1. IC50 response was superior to the standard chelator. An in silico molecular docking study was carried out using 3D structure of PDE1 to study the binding interactions of compound 1. The docking study predicted that flavone had a lower binding affinity (-7.6 kcal/mol) and total energy (-95 kcal/mol) score compared to EDTA. The minimal energy associated with the ligand-protein complex implied that isolated compound 1 can serve as a therapeutic agent against PDE1 enzyme-provoked ailments like asthma, hypertension, schizophrenia, and erectile dysfunction.
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Le ML, Jiang MY, Han C, Yang YY, Wu Y. PDE1 inhibitors: a review of the recent patent literature (2008-present). Expert Opin Ther Pat 2022; 32:423-439. [PMID: 35016587 DOI: 10.1080/13543776.2022.2027910] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
INTRODUCTION : PDE1 has been demonstrated to be a potential drug target for a variety of diseases, such as Alzheimer's disease and cardiovascular disease. In the past decades, numerous PDE1 inhibitors with structural diversities have been developed and patented by pharmaceutical companies, providing drug candidates for exploring novel disease indications of PDE1. AREA COVERED : This review aims to provide an overview of PDE1 inhibitors reported in patents from 2008 to present. EXPERT OPINION : Among current PDE1 inhibitors, only a few of them showed high selectivity over other PDEs, which might cause severe side effects in clinic. The development of highly selective PDE1 inhibitors is still the "top priority" in the following research. The selective recognition mechanism of PDE1 with inhibitors should be further elucidated by X-ray crystallography in order to provide evidences for the rational design of selective PDE1 inhibitors. In addition, PDE1 inhibitors should be applied in the different clinical indications beyond CNS diseases.
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Affiliation(s)
- Mei-Ling Le
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Mei-Yan Jiang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Chuan Han
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Yi-Yi Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Yinuo Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
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Qin M, Guo A, Li F, Zhang F, Bi M, Zhang Y, Zhu W. Liquiritigenin enhances cyclic adenosine monophosphate production to mitigate inflammation in dendritic cells. Int J Immunopathol Pharmacol 2021; 35:20587384211038098. [PMID: 34939873 PMCID: PMC8728780 DOI: 10.1177/20587384211038098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Objective: This study aims to dissect the mechanism of traditional Chinese medicinal
herbs against asthma; we chose to first focus on the main chemical components of licorice
to investigate their contribution to asthmatic inflammation inhibition. Methods:
Production of cellular nucleotide molecules such as cAMP, cGMP, and cGAMP was examined by
using enzyme-linked immunosorbent assay (ELISA). Enzyme-encoding genes were tested
in vitro using quantitative real-time PCR and protein level was
detected by Western blotting analysis. In addition, co-culturing of murine dendritic cells
together with T cells was conducted to examine the expression of cytokine genes and host
immune response. Results: We found that one of the components within licorice, named
liquiritigenin (LR), could efficiently enhance cAMP production in different cell lines.
The augmentation of such molecules was linked to the high expression of cAMP synthesis
genes and repressed expression of cAMP breaking down genes. In addition, the downstream
immune response was also alleviated by the increase in cAMP levels by LR, suggesting the
great potential of this molecule against inflammation. Subsequent immunological tests
showed that LR could efficiently inhibit the expression of several cytokines and alter the
NF-κB pathway and T cell polarization. Conclusion: Altogether, we have identified a
promising antiasthmatic agent LR that could exhibit immunosuppressive function by
elevating the cAMP level.
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Affiliation(s)
- Mingming Qin
- Department of Pediatrics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Aili Guo
- Department of Pediatrics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Feng Li
- Department of Pediatrics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fuxiang Zhang
- Department of Critical Care Medicine, 66310The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Meirong Bi
- Department of Pediatrics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yamin Zhang
- Department of Pediatrics, 372527Weifang Medical University, Weifang, China
| | - Weiwei Zhu
- Department of Pediatrics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
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Kasprzyk R, Jemielity J. Enzymatic Assays to Explore Viral mRNA Capping Machinery. Chembiochem 2021; 22:3236-3253. [PMID: 34291555 PMCID: PMC8426721 DOI: 10.1002/cbic.202100291] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/21/2021] [Indexed: 12/25/2022]
Abstract
In eukaryotes, mRNA is modified by the addition of the 7-methylguanosine (m7 G) 5' cap to protect mRNA from premature degradation, thereby enhancing translation and enabling differentiation between self (endogenous) and non-self RNAs (e. g., viral ones). Viruses often develop their own mRNA capping pathways to augment the expression of their proteins and escape host innate immune response. Insights into this capping system may provide new ideas for therapeutic interventions and facilitate drug discovery, e. g., against viruses that cause pandemic outbreaks, such as beta-coronaviruses SARS-CoV (2002), MARS-CoV (2012), and the most recent SARS-CoV-2. Thus, proper methods for the screening of large compound libraries are required to identify lead structures that could serve as a basis for rational antiviral drug design. This review summarizes the methods that allow the monitoring of the activity and inhibition of enzymes involved in mRNA capping.
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Affiliation(s)
- Renata Kasprzyk
- Centre of New TechnologiesUniversity of WarsawBanacha 2c02-097WarsawPoland
- College of Inter-Faculty Individual Studies inMathematics and Natural SciencesUniversity of WarsawBanacha 2c02-097WarsawPoland
| | - Jacek Jemielity
- Centre of New TechnologiesUniversity of WarsawBanacha 2c02-097WarsawPoland
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Orhan IE, Rauf A, Saleem M, Khalil AA. Natural Molecules as Talented Inhibitors of Nucleotide Pyrophosphatases/Phosphodiesterases (PDEs). Curr Top Med Chem 2021; 22:209-228. [PMID: 34503407 DOI: 10.2174/1568026621666210909164118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/03/2021] [Accepted: 08/12/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Phosphodiesterases (PDEs) are a wide group of enzymes with multiple therapeutic actions, including vasorelaxation, cardiotonic, antidepressant, anti-inflammatory, antithrombotic, anti-spasmolytic, memory-enhancing, and anti-asthmatic. PDEs with eleven subtypes from PDE-1 to PDE-11 typically catalyze the cleavage of the phosphodiester bond and, hence, degrades either cyclic adenosine monophosphate (cAMP) or cyclic guanosine monophosphate (cGMP). OBJECTIVE Several selective or non-selective inhibitors of the PDE subtypes are used clinically, i.e. sildenafil, rolipram, cysteine, etc. Recently, interest in plant-based pharmacologically bioactive compounds having potent PDEs inhibitory potential has increased. Purposely, extensive research has been carried out on natural products to explore new inhibitors of various PDEs. Therefore, this review summarizes the published data on natural PDEs inhibitors and their potential therapeutic applications. METHODS For this purpose, natural compounds with PDE inhibitory potential have been surveyed through several databases, including PubMed, Web of Sciences (WoS), Scopus, and Google Scholar. RESULTS According to a detailed literature survey, the most promising class of herbal compounds with PDE-inhibiting property has been found to belong to phenolics, including flavonoids (luteolin, kaempferol, icariin, etc.). Many other encouraging inhibitors from plants have also been identified, such as coumarins (23, 24) (licoarylcoumarin and glycocoumarin,), saponins ( agapanthussaponins), lignans (31, 33) [(±)-schizandrin and kobusin], terpenes (28, 29, 31) (perianradulcin A, quinovic acid, and ursolic acid), anthraquinones (18, 19) (emodin and chrysophanol), and alkaloids (Sanjoinine-D) (36). CONCLUSION In this review, studies have revealed the PDE-inhibitory potential of natural plant extracts and their bioactive constituents in treating various diseases; however, further clinical studies comprising synergistic use of different therapies (synthetic & natural) to acquire multi-targeted results might also be a promising option.
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Affiliation(s)
- Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara. Turkey
| | - Abdur Rauf
- Department of Chemistry, University of Swabi, Anbar, 25120, KPK. Pakistan
| | - Muhammad Saleem
- Department of Chemistry, Ghazi University, Dera Ghazi Khan-32200, Punjab. Pakistan
| | - Anees Ahmed Khalil
- University Institute of Diet and Nutritional Sciences, Faculty of Allied Health Sciences, The University of Lahore. Pakistan
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Zygmuntowicz A, Markiewicz W, Grabowski T, Burmańczuk A, Vyniarska A, Jaroszewski JJ. Quercetin affects uterine smooth muscle contractile activity in gilts. PLoS One 2021; 16:e0252438. [PMID: 34270573 PMCID: PMC8284652 DOI: 10.1371/journal.pone.0252438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 06/17/2021] [Indexed: 11/18/2022] Open
Abstract
Quercetin is a polyphenolic flavonoid occurring in leaves, stems, flowers and fruits of many plants. In traditional Chinese medicine, it is used as a natural therapeutic agent with a broad spectrum of activities (antioxidant, neuroprotective, anti-inflammatory, anticancer, antibacterial and antiviral). Moreover, quercetin affects function of the reproductive tract, however the knowledge of this activity is still fragmentary. Therefore, this study aimed to determine the influence of quercetin on the contractile activity of the porcine myometrium collected from immature (n = 6), cyclic (n = 6) and early pregnant (n = 6) gilts. Strips of the myometrium (comprising longitudinal and circular layer) were resected from the middle part of the uterine horns and the isometric contractions were recorded. After 60-90 min of preincubation, the strips were stimulated with quercetin in increasing (10-13-10-1 M) concentrations and the changes in the tension amplitude and frequency of contractions were measured. Quercetin decreased (P<0.01-0.001) the amplitude of contractions at concentrations 10-11-10-1 M and 10-10-10-1 M in cyclic and early pregnant groups, respectively. The frequency of contractions decreased in all groups but was the highest (at concentrations 10-11-10-1 M; P<0.05-0.001) in the cyclic group and the lowest (at concentrations 10-5-10-1 M; P<0.01) in the immature group. The tension decreased only in the cyclic group after quercetin administration in high concentrations (10-6-10-1 M; P<0.05-0.01). The results indicate that quercetin causes relaxation of the porcine uterine smooth muscle but this activity is strongly related to the physiological status of the gilts.
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Affiliation(s)
- Aleksandra Zygmuntowicz
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Włodzimierz Markiewicz
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | | | - Artur Burmańczuk
- Department of Pharmacology Toxicology and Environmental Protection, Faculty of Veterinary Medicine, University of Life Sciences, Lublin, Poland
| | - Alla Vyniarska
- Department of Pharmacology and Toxicology, Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies, Lviv, Ukraine
| | - Jerzy Jan Jaroszewski
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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Aebisher D, Cichonski J, Szpyrka E, Masjonis S, Chrzanowski G. Essential Oils of Seven Lamiaceae Plants and Their Antioxidant Capacity. Molecules 2021; 26:3793. [PMID: 34206525 PMCID: PMC8270304 DOI: 10.3390/molecules26133793] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/09/2021] [Accepted: 06/15/2021] [Indexed: 11/16/2022] Open
Abstract
Oxidative stress has been reported as a cause of many diseases like Parkinson's, Alzheimer's, cardiovascular disease, and diabetes. Oxidative stress can also lead to cancer formation by promoting tumor development and progression. Antioxidants derived from Lamiaceae plants play an important role in natural medicine, pharmacology, cosmetology, and aromatherapy. Herein, we examine the antioxidative capacity of essential oils from seven aromatic Lamiaceae plants against the synthetic radicals DPPH and ABTS. Among the essential oils analyzed, the most robust scavenging capacities were found in mixtures of volatile compounds from thyme and savory. The scavenging activity of tested EOs against the ABTS radical was clearly higher than activity towards DPPH. Analysis of essential oils with weaker antioxidant activity has shown that volatile compounds from marjoram, sage, and hyssop were more active than EOs from lavender and mint. It can be suggested that the potent antioxidant capacity of thyme (Thymus vulgaris) and savory (Satyreja hortensis) are related to a high level of phenolic constituents, such as thymol and carvacrol. On the other hand, the elevated antioxidative power of marjoram, sage, and hyssop essential oils may also be due to their terpinene, o-cymene, terpinolene, and terpinen-4-ol constituents. Although non-phenolic components are less active than thymol or carvacrol, they may affect antioxidant capacity synergistically.
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Affiliation(s)
- David Aebisher
- Department of Photomedicine and Physical Chemistry, Institute of Medical Studies, Medical College of Rzeszów University, Warzywna 1A Street, 35-959 Rzeszów, Poland
| | - Jan Cichonski
- Department of Biotechnology, Institute of Biology and Biotechnology, University of Rzeszow, 8B Zelwerowicza Street, 35-601 Rzeszow, Poland; (J.C.); (E.S.); (S.M.)
| | - Ewa Szpyrka
- Department of Biotechnology, Institute of Biology and Biotechnology, University of Rzeszow, 8B Zelwerowicza Street, 35-601 Rzeszow, Poland; (J.C.); (E.S.); (S.M.)
| | - Sygit Masjonis
- Department of Biotechnology, Institute of Biology and Biotechnology, University of Rzeszow, 8B Zelwerowicza Street, 35-601 Rzeszow, Poland; (J.C.); (E.S.); (S.M.)
| | - Grzegorz Chrzanowski
- Department of Biotechnology, Institute of Biology and Biotechnology, University of Rzeszow, 8B Zelwerowicza Street, 35-601 Rzeszow, Poland; (J.C.); (E.S.); (S.M.)
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Caesalpinia sappan L. Ameliorates Scopolamine-Induced Memory Deficits in Mice via the cAMP/PKA/CREB/BDNF Pathway. Sci Pharm 2021. [DOI: 10.3390/scipharm89020029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Memory is an essential aspect of human cognition. A decrease in this aspect is well associated with Alzheimer’s disease (AD). The development of a novel cognitive enhancer (CE) may help overcome AD-related problems. In this study, we evaluated the CE effect of Caesalpinia sappan L. (CS) in memory deficit mice. Administration of its ethanolic extract (250 and 500 mg/kg body weight (BW)) and brazilin (5 and 10 mg/kg BW) ameliorated the scopolamine-amnesic effect, as evidenced by significant decreases (p < 0.01, p < 0.05) in the escape latency time and increases (p < 0.01) in the percentage of time spent in the target quadrant of the Morris water maze test. We also examined the cyclic adenosine monophosphate (cAMP) level, protein kinase A (PKA) activity, and protein expression levels of phosphorylated cAMP response element binding (pCREB) and brain-derived neurotrophic factor (BDNF) in hippocampal tissues to elucidate the underlying molecular mechanism. Results showed that CS wood ethanolic extract and brazilin not only significantly increase (p < 0.01, p < 0.05) cAMP levels and PKA activity but also significantly enhance (p < 0.01, p < 0.05) the expression level of pCREB and BDNF in the hippocampus. These findings indicate that CS activates the cAMP/PKA/CREB/BDNF pathway. Taken together, our results demonstrate that CS is a promising herb that could be developed as a CE agent.
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Sherikar A, Dhavale R, Bhatia M. Vasorelaxant Effect of Novel Nitric Oxide-Hydrogen Sulfide Donor Chalcone in Isolated Rat Aorta: Involvement of cGMP Mediated sGC and Potassium Channel Activation. Curr Mol Pharmacol 2021; 13:126-136. [PMID: 31654520 DOI: 10.2174/1874467212666191025092346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/03/2019] [Accepted: 10/15/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND AND OBJECTIVE Recently, nitric oxide (NO) and hydrogen sulfide (H2S) donating moieties were extensively studied for their role in the vasculature as they are responsible for many cellular and pathophysiological functioning. The objective of the present study is to evaluate novel NO and H2S donating chalcone moieties on isolated rat aorta for vasorelaxation, and to investigate the probable mechanism of action. METHODS To extend our knowledge of vasorelaxation by NO and H2S donor drugs, here we investigated the vasorelaxing activity of novel NO and H2S donating chalcone moieties on isolated rat aorta. The mechanism of vasorelaxation by these molecules was investigated by performing in vitro cGMP mediated sGC activation assay and using Tetraethylammonium chloride (TEA) as a potassium channel blocker and Methylene blue as NO blocker. RESULTS Both NO and H2S donating chalcone moieties were found to be potent vasorelaxant. The compound G4 and G5 produce the highest vasorelaxation with 3.716 and 3.789 M of pEC50, respectively. After the addition of TEA, G4 and G5 showed 2.772 and 2.796 M of pEC50, respectively. The compounds Ca1, Ca2, and D7 produced significant activation and release of cGMP mediated sGC which was 1.677, 1.769 and 1.768 M of pEC50, respectively. CONCLUSION The vasorelaxation by NO-donating chalcones was blocked by Methylene blue but it did not show any effect on H2S donating chalcones. The vasorelaxing potency of NO-donating molecules was observed to be less affected by the addition of TEA but H2S donors showed a decrease in both efficacy and potency. The cGMP release was more in the case of NO-donating molecules. The tested compounds were found potent for relaxing vasculature of rat aorta.
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Affiliation(s)
- Amol Sherikar
- Department of Pharmaceutical Chemistry, Tatyasaheb Kore College of Pharmacy, Warananagar, Tal-Panhala, Dist- Kolhapur-416 113 (MS), India
| | - Rakesh Dhavale
- Department of Pharmaceutical Chemistry, Bharati Vidyapeeth College of Pharmacy, Kolhapur, Near Chitranagri, Kolhapur-416 013 (MS), India
| | - Manish Bhatia
- Department of Pharmaceutical Chemistry, Bharati Vidyapeeth College of Pharmacy, Kolhapur, Near Chitranagri, Kolhapur-416 013 (MS), India
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Development of Phosphodiesterase-Protein-Kinase Complexes as Novel Targets for Discovery of Inhibitors with Enhanced Specificity. Int J Mol Sci 2021; 22:ijms22105242. [PMID: 34063491 PMCID: PMC8156604 DOI: 10.3390/ijms22105242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 04/25/2021] [Accepted: 05/13/2021] [Indexed: 11/29/2022] Open
Abstract
Phosphodiesterases (PDEs) hydrolyze cyclic nucleotides to modulate multiple signaling events in cells. PDEs are recognized to actively associate with cyclic nucleotide receptors (protein kinases, PKs) in larger macromolecular assemblies referred to as signalosomes. Complexation of PDEs with PKs generates an expanded active site that enhances PDE activity. This facilitates signalosome-associated PDEs to preferentially catalyze active hydrolysis of cyclic nucleotides bound to PKs and aid in signal termination. PDEs are important drug targets, and current strategies for inhibitor discovery are based entirely on targeting conserved PDE catalytic domains. This often results in inhibitors with cross-reactivity amongst closely related PDEs and attendant unwanted side effects. Here, our approach targeted PDE–PK complexes as they would occur in signalosomes, thereby offering greater specificity. Our developed fluorescence polarization assay was adapted to identify inhibitors that block cyclic nucleotide pockets in PDE–PK complexes in one mode and disrupt protein-protein interactions between PDEs and PKs in a second mode. We tested this approach with three different systems—cAMP-specific PDE8–PKAR, cGMP-specific PDE5–PKG, and dual-specificity RegA–RD complexes—and ranked inhibitors according to their inhibition potency. Targeting PDE–PK complexes offers biochemical tools for describing the exquisite specificity of cyclic nucleotide signaling networks in cells.
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18
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Anand Ganapathy A, Hari Priya VM, Kumaran A. Medicinal plants as a potential source of Phosphodiesterase-5 inhibitors: A review. JOURNAL OF ETHNOPHARMACOLOGY 2021; 267:113536. [PMID: 33137431 DOI: 10.1016/j.jep.2020.113536] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/12/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The prevalence and distress caused by erectile dysfunction (ED) to both male and female partners are increasing at a steady rate. ED has now become the most treated sexual disorder for men among young and old age groups due to varying physical and psychological factors. The treatment with synthetic Phosphodiesterase-5 (PDE5) inhibitors are cost-effective but due to adverse effects such as priapism, loss of vision, heart attack and syncope, the daily life patterns of these patients are distressed and hence the need for alternative medicaments or sources are of utmost important. Therefore, the exploration of medicinal plants as PDE5 inhibitors will be worthwhile in tackling the problems as many plant extracts and fractions have been long used as aphrodisiacs and sexual stimulants which may be found to be active against PDE5 enzyme. AIM OF THE STUDY To provide a review on the different medicinal herbs traditionally used as natural aphrodisiacs, libido or sexual enhancers which are proven for their PDE5 inhibitory effect. MATERIALS AND METHODS Ethnobotanical and scientific information was procured, reviewed and compiled from the literature search of electronic databases and search engines. RESULTS A total of 97 medicinal plants exhibiting PDE5 inhibitory effect are reviewed in this paper which is supported by preclinical experimental evidence. Among them, 77 plants have been selected according to their traditional and ethnobotanical uses as aphrodisiacs and the rest are screened according to their effectiveness against predisposing factors responsible for ED and sexual dysfunction such as diabetes and hypertension or due to the presence of phytochemicals having structural similarity towards the identified natural PDE5 inhibitors. In addition, sixteen alkaloids, sixty-one phenolics and eight polycyclic aromatic hydrocarbons have been isolated or identified from active extracts or fractions that are exhibiting PDE5 inhibitory activity. Among them, isoflavones and biflavones are the major active constituents responsible for action, where the presence of prenyl group for isoflavones; and the methoxy group at C-5 position of flavones are considered essential for the inhibitory effect. However, the prenylated flavonol glycoside, Icariin and Icariside II isolated from Epimedium brevicornum Maxim (hory goat weed) are the most effective inhibitor, till date from natural sources. Traditional medicines or formulations containing extracts of Ginkgo biloba L., Kaempferia parviflora Wall. ex Baker, Clerodendrum colebrookianum Walp., Eurycoma longifolia Jack and Vitis vinifera L. are also found to be inhibitors of PDE5 enzyme. CONCLUSION The review suggests and supports the rational use of traditional medicines that can be further studied for the development of potential PDE5 inhibitors. Many traditional medicines are still used in various regions of Africa, Asia and South America that are poorly characterized and experimented. Despite the availability of a vast majority of traditional formulations as aphrodisiacs or sexual stimulants, there exists a need for systemic evaluation on the efficacy as well as the mechanism of action of the herbal constituents for the identification of novel chemical moieties that can be further developed for maximum efficacy.
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Affiliation(s)
- A Anand Ganapathy
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, India
| | - V M Hari Priya
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, India
| | - Alaganandam Kumaran
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, India.
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Santos WA, Dourado KMC, Araújo FA, Jesus RLC, Moraes RA, Oliveira SCDS, Alves QL, Simões LO, Casais-E-Silva LL, Costa RS, Velozo ES, Silva DF. Braylin induces a potent vasorelaxation, involving distinct mechanisms in superior mesenteric and iliac arteries of rats. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2021; 394:437-446. [PMID: 33034715 DOI: 10.1007/s00210-020-01985-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 10/04/2020] [Indexed: 11/28/2022]
Abstract
Arterial hypertension is a risk factor for various cardiovascular and renal diseases, representing a major public health challenge. Although a wide range of treatment options are available for blood pressure control, many hypertensive individuals remain with uncontrolled hypertension. Thus, the search for new substances with antihypertensive potential becomes necessary. Coumarins, a group of polyphenolic compounds derived from plants, have attracted intense interest due to their diverse pharmacological properties, like potent antihypertensive activities. Braylin (6-methoxyseselin) is a coumarin identified in the Zanthoxylum tingoassuiba species, described as a phosphodiesterase-4 (PDE4) inhibitor. Although different coumarin compounds have been described as potent antihypertensive agents, the activity of braylin on the cardiovascular system has yet to be investigated. To investigate the vasorelaxation properties of braylin and its possible mechanisms of action, we performed in vitro studies using superior mesenteric arteries and the iliac arteries isolated from rats. In this study, we demonstrated, for the first time, that braylin induces potent vasorelaxation, involving distinct mechanisms from two different arteries, isolated from rats. A possible inhibition of phosphodiesterase, altering the cyclic adenosine monophosphate (cAMP)/cAMP-dependent protein kinase (PKA) pathway, may be correlated with the biological action of braylin in the mesenteric vessel, while in the iliac artery, the biological action of braylin may be correlated with increase of cyclic guanosine monophosphate (cGMP), followed by BKCa, Kir, and Kv channel activation. Together, these results provide evidence that braylin can represent a potential therapeutic use in preventing and treating cardiovascular diseases.
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Affiliation(s)
- W A Santos
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - K M C Dourado
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - F A Araújo
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation - FIOCRUZ, Rio de Janeiro, Bahia, Brazil
| | - R L C Jesus
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - R A Moraes
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - S C D S Oliveira
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - Q L Alves
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - L O Simões
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - L L Casais-E-Silva
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil
| | - R S Costa
- Faculty of Pharmacy, Federal University of Bahia, Salvador, Bahia, Brazil
| | - E S Velozo
- Faculty of Pharmacy, Federal University of Bahia, Salvador, Bahia, Brazil
| | - D F Silva
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Avenida Reitor Miguel Calmon, Vale do Canela, Salvador, Bahia, 40110-902, Brazil.
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation - FIOCRUZ, Rio de Janeiro, Bahia, Brazil.
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Ribaudo G, Memo M, Gianoncelli A. A Perspective on Natural and Nature-Inspired Small Molecules Targeting Phosphodiesterase 9 (PDE9): Chances and Challenges against Neurodegeneration. Pharmaceuticals (Basel) 2021; 14:ph14010058. [PMID: 33451065 PMCID: PMC7828511 DOI: 10.3390/ph14010058] [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: 12/24/2020] [Revised: 01/07/2021] [Accepted: 01/10/2021] [Indexed: 12/24/2022] Open
Abstract
As life expectancy increases, dementia affects a growing number of people worldwide. Besides current treatments, phosphodiesterase 9 (PDE9) represents an alternative target for developing innovative small molecules to contrast neurodegeneration. PDE inhibition promotes neurotransmitter release, amelioration of microvascular dysfunction, and neuronal plasticity. This review will provide an update on natural and nature-inspired PDE9 inhibitors, with a focus on the structural features of PDE9 that encourage the development of isoform-selective ligands. The expression in the brain, the presence within its structure of a peculiar accessory pocket, the asymmetry between the two subunits composing the protein dimer, and the selectivity towards chiral species make PDE9 a suitable target to develop specific inhibitors. Additionally, the world of natural compounds is an ideal source for identifying novel, possibly asymmetric, scaffolds, and xanthines, flavonoids, neolignans, and their derivatives are currently being studied. In this review, the available literature data were interpreted and clarified, from a structural point of view, taking advantage of molecular modeling: 3D structures of ligand-target complexes were retrieved, or built, and discussed.
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Qu H, Zhang K, Fu C, Qiu F. Simultaneous quantification and pharmacokinetic evaluation of roflumilast and its N-oxide in cynomolgus monkey plasma by LC-MS/MS method. Biomed Chromatogr 2020; 35:e4973. [PMID: 32840886 DOI: 10.1002/bmc.4973] [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: 03/13/2020] [Revised: 08/16/2020] [Accepted: 08/21/2020] [Indexed: 11/09/2022]
Abstract
Roflumilast (ROF), a nonsteroidal anti-inflammatory drug, has successfully been used to treat systemic and pulmonary inflammation associated with chronic obstructive pulmonary disease. To evaluate its pharmacokinetics in monkeys, a sensitive, rapid and reliable liquid chromatography with tandem mass spectrometry (LC-MS/MS) method was developed for the simultaneous determination of ROF and its N-oxide metabolite (RNO). The mobile phase contained 0.1% formic acid aqueous solution (A) and 0.1% formic acid acetonitrile solution (B). All monkey plasma samples were pretreated using protein precipitation with methanol-acetonitrile (50:50, v/v) in 50 μl plasma samples. Chromatographic separation was performed with mass spectral acquisition performed in positive electrospray ionization, utilizing multiple reaction monitoring. This method was successfully applied to a pharmacokinetic study in cynomolgus monkeys. Following administration of a single oral dose of 1 mg/kg ROF in monkeys, pharmacokinetic data for ROF and RNO was reported for the first time. After oral administration, ROF was rapidly absorbed and metabolized to its metabolite RNO. The mean area under the curve value of RNO was ~13 times larger than that of ROF, suggesting that most ROF was metabolized to RNO in cynomolgus monkeys.
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Affiliation(s)
- Haijun Qu
- Department of Pharmacy, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Keyu Zhang
- Beijing Key Lab of TCM Collateral Disease Theory Research, School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Chunqing Fu
- Beijing Key Lab of TCM Collateral Disease Theory Research, School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Feng Qiu
- Beijing Key Lab of TCM Collateral Disease Theory Research, School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
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Zou X, Feng X, Fu Y, Zheng Y, Ma M, Wang C, Zhang Y. Icariin Attenuates Amyloid-β (Aβ)-Induced Neuronal Insulin Resistance Through PTEN Downregulation. Front Pharmacol 2020; 11:880. [PMID: 32581820 PMCID: PMC7296100 DOI: 10.3389/fphar.2020.00880] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 05/28/2020] [Indexed: 12/23/2022] Open
Abstract
Neuronal insulin resistance is implicated in neurodegenerative diseases. Icariin has been reported to improve insulin resistance in skeletal muscle cells and to restore impaired hypothalamic insulin signaling in the rats with chronic unpredictable mild stress. In addition, icariin can exert the neuroprotective effects in the mouse models of neurodegenerative diseases. However, the molecular mechanisms by which icariin affects neuronal insulin resistance are poorly understood. In the present study, amyloid-β (Aβ) was used to induce insulin resistance in human neuroblastoma SK-N-MC cells. Insulin sensitivity was evaluated by measuring insulin-stimulated Akt T308 phosphorylation and glucose uptake. We found that the phosphatase and tensin homologue deleted on chromosome 10 (PTEN) mediated Aβ-induced insulin resistance. Icariin treatment markedly reduced Aβ-enhanced PTEN protein levels, leading to an improvement in Aβ-induced insulin resistance. Accordingly, PTEN overexpression obviously abolished the protective effects of icariin on Aβ-induced insulin resistance. Furthermore, icariin activated proteasome activity. The proteasome inhibitor MG132 attenuated the effects of icariin on PTEN protein levels. Taken together, these results suggest that icariin protects SK-N-MC cells against Aβ-induced insulin resistance by activating the proteasome-dependent degradation of PTEN. These findings provide an experimental background for the identification of novel molecular targets of icariin, which may help in the development of alternative therapeutic approaches for neurodegenerative diseases.
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Affiliation(s)
- Xiaomei Zou
- Neurology Center, The Second People's Hospital of Jingzhou City, Jingzhou, China
| | - Xiyao Feng
- 2018 Clinical Medicine, Hubei University of Medicine, Shiyan, China
| | - Yalin Fu
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China.,Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
| | - Yuyang Zheng
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China.,Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
| | - Mingke Ma
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China.,Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
| | - Changhua Wang
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China.,Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
| | - Yemin Zhang
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China.,Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
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Bhandari S, Nuengchamnong N, Chaichamnong N, Seasong T, Ingkaninan K, Temkitthawon P. At-line LC-QTOF-MS micro-fractionation of Derris scandens (Roxb.) Benth, coupled to radioassay for the early identification of PDE5A1 inhibitors. PHYTOCHEMICAL ANALYSIS : PCA 2020; 31:297-305. [PMID: 31777141 DOI: 10.1002/pca.2895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 09/25/2019] [Accepted: 09/27/2019] [Indexed: 06/10/2023]
Abstract
INTRODUCTION Chromatographic techniques coupled with bioassays are popularly used for the detection of bioactive compounds in natural products. In this study phytochemicals responsible for showing Phosphodiesterase type 5 (PDE5) inhibitory activity in Derris scandens were studied using at-line method. OBJECTIVE The objective of this study was to develop an at-line liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QTOF-MS) micro-fractionation method for rapid separation and identification of PDE5A1 inhibitors in 95% ethanolic extract of D. scandens. METHODOLOGY Initially, the correlation between LC-MS and PDE5A1 inhibitory activity was studied using three concentrations of 1:1 mixture of sildenafil and derrisisoflavone A; PDE5A1 inhibitors. The mixture was separated by high-performance liquid chromatography (HPLC) column and the eluent was split into two flows in the ratio of 1:9. The major part was collected in a 96-well plate, in each well consecutively every 30 s. The minor part was fed into an electrospray ionisation (ESI)-QTOF-MS system. After subsequent solvent removal, the collected micro-fractions were subjected to radioassay to determine PDE5A1 inhibition. RESULTS The result showed, PDE5A1 inhibitory activities of the micro-fractions were observed in a dose response manner and found to be in agreement with an off-line study. Similarly, 95% ethanolic extract of D. scandens was subjected to the at-line LC-QTOF-MS micro-fractionation developed, resulting in separation and tentative identification of 25 compounds with PDE5A1 inhibitory activity. Most of the compounds contained prenylated isoflavone skeleton. Additionally, the active micro-fractions also showed selectivity on PDE5A1 over PDE6 and PDE1B. CONCLUSION Our results demonstrated that the at-line coupled LC-QTOF-MS micro-fractionation with PDE5A1 inhibitory assay is a valuable tool for identifying PDE5A1 inhibitors from complex extracts.
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Affiliation(s)
- Samjhana Bhandari
- Bioscreening Unit, Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Centre of Excellence for Innovation in Chemistry, Phitsanulok, Thailand
| | - Nitra Nuengchamnong
- Science Lab Centre, Faculty of Science, Naresuan University, Phitsanulok, Thailand
| | - Nattiya Chaichamnong
- Bioscreening Unit, Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Centre of Excellence for Innovation in Chemistry, Phitsanulok, Thailand
- Division of Applied Thai Traditional Medicine, Faculty of Public Health, Naresuan University, Phitsanulok, Thailand
| | - Tongchai Seasong
- Bioscreening Unit, Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Centre of Excellence for Innovation in Chemistry, Phitsanulok, Thailand
| | - Kornkanok Ingkaninan
- Bioscreening Unit, Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Centre of Excellence for Innovation in Chemistry, Phitsanulok, Thailand
| | - Prapapan Temkitthawon
- Bioscreening Unit, Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Centre of Excellence for Innovation in Chemistry, Phitsanulok, Thailand
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Fu Y, Ding X, Zhang X, Shao X, Zhao J, Xu Y, Luo X, Zhao W. Diterpenoids from the Root Bark of Pinus massoniana and Evaluation of Their Phosphodiesterase Type 4D Inhibitory Activity. JOURNAL OF NATURAL PRODUCTS 2020; 83:1229-1237. [PMID: 32100544 DOI: 10.1021/acs.jnatprod.9b01269] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Thirty-two diterpenoids were obtained from the root bark of Pinus massoniana, and, among them, five compounds (pinmassins A-E) were identified as undescribed analogues. Spectroscopic methods, X-ray single-crystal diffraction analysis, and ECD calculations were applied to establish the structure of the new isolates. Pinmassin D (4) and abieta-8,11,13,15-tetraen-18-oic acid (23) showed moderate phosphodiesterase type 4D (PDE4D) inhibitory effects with IC50 values of 2.8 ± 0.18 and 3.3 ± 0.50 μM, respectively, and their binding modes were investigated by a molecular docking study.
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Affiliation(s)
- Yifan Fu
- Department of Natural Products Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xiaoyu Ding
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Xianglei Zhang
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Xingcheng Shao
- Department of Natural Products Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jihui Zhao
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Yechun Xu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Xiaomin Luo
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Weimin Zhao
- Department of Natural Products Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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26
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Du YQ, Yan ZY, Chen JJ, Wang XB, Huang XX, Song SJ. The identification of phenylpropanoids isolated from the root bark of Ailanthus altissima (Mill.) Swingle. Nat Prod Res 2019; 35:1139-1146. [PMID: 31315448 DOI: 10.1080/14786419.2019.1643861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Chemical investigation of 75% EtOH exact of the root bark of Ailanthus altissima (Mill.) Swingle led to the isolation and identification of two new phenylpropanoids (1-2), along with six known compounds (3-8). Their chemical structures were elucidated by extensive spectroscopic data analyses including NMR experiments and HRESIMS analyses, as well as computer-assisted structure elucidation software (ACD/Spectrus Processor). All compounds were evaluated for cytotoxic activities against Hep 3B and Hep G2 cells. Compound 1 and 7 displayed weak cytotoxic activities against the Hep 3B cell line.
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Affiliation(s)
- Ye-Qing Du
- School of Traditional Chinese Materia Medica, Key Laboratory of Computational Chemistry-Based Natural Antitumor drug Research & Development, Liaoning Province, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Zhi-Yang Yan
- School of Traditional Chinese Materia Medica, Key Laboratory of Computational Chemistry-Based Natural Antitumor drug Research & Development, Liaoning Province, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Jing-Jie Chen
- School of Traditional Chinese Materia Medica, Key Laboratory of Computational Chemistry-Based Natural Antitumor drug Research & Development, Liaoning Province, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Xiao-Bo Wang
- Chinese People's Liberation Army Logistics support force No.967 Hospital, Dalian, People's Republic of China
| | - Xiao-Xiao Huang
- School of Traditional Chinese Materia Medica, Key Laboratory of Computational Chemistry-Based Natural Antitumor drug Research & Development, Liaoning Province, Shenyang Pharmaceutical University, Shenyang, People's Republic of China.,Chinese People's Liberation Army Logistics support force No.967 Hospital, Dalian, People's Republic of China
| | - Shao-Jiang Song
- School of Traditional Chinese Materia Medica, Key Laboratory of Computational Chemistry-Based Natural Antitumor drug Research & Development, Liaoning Province, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
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Mali DP, Bhatia NM. Hetero-Tricyclic Lead Scaffold as Novel PDE5A Inhibitor for Antihypertensive Activity: In Silico Docking Studies. Curr Comput Aided Drug Des 2019; 15:318-333. [DOI: 10.2174/1573409915666190214161221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 12/14/2018] [Accepted: 02/07/2019] [Indexed: 12/11/2022]
Abstract
Objective:To screen the phytochemicals for phosphodiesterase 5A (PDE5A) inhibitory potential and identify lead scaffolds of antihypertensive phytochemicals using in silico docking studies.Methods:In this perspective, reported 269 antihypertensive phytochemicals were selected. Sildenafil, a PDE5A inhibitor was used as the standard. In silico docking study was carried out to screen and identify the inhibiting potential of the selected phytochemicals against PDE5A enzyme using vLife MDS 4.4 software.Results:Based on docking score, π-stacking, H-bond and ionic interactions, 237 out of 269 molecules were selected which have shown one or more interactions. Protein residue Gln817A was involved in H-boding whereas Val782A, Phe820A and Leu804A were involved in π-stacking interaction with ligand. The selected 237 phytochemicals were structurally diverse, therefore 82 out of 237 molecules with one or more tricycles were filtered out for further analysis. Amongst tricyclic molecules, 14 molecules containing nitrogen heteroatom were selected for lead scaffold identification which finally resulted in three different basic chemical backbones like pyridoindole, tetrahydro-pyridonaphthyridine and dihydro-pyridoquinazoline as lead scaffolds.Conclusion:In silico docking studies revealed that nitrogen-containing tetrahydro-pyridonaphthyridine and dihydro-pyridoquinazoline tricyclic lead scaffolds have emerged as novel PDE5A inhibitors for antihypertensive activity. The identified lead scaffolds may provide antihypertensive lead molecules after its optimization.
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Affiliation(s)
- Dipak P. Mali
- Department of Quality Assurance, Bharati Vidyapeeth College of Pharmacy, Kolhapur, 416013, Maharashtra, India
| | - Neela M. Bhatia
- Department of Quality Assurance, Bharati Vidyapeeth College of Pharmacy, Kolhapur, 416013, Maharashtra, India
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Rahman HMA, Rasool MF, Imran I. Pharmacological Studies Pertaining to Smooth Muscle Relaxant, Platelet Aggregation Inhibitory and Hypotensive Effects of Ailanthus altissima. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2019; 2019:1871696. [PMID: 30941187 PMCID: PMC6421032 DOI: 10.1155/2019/1871696] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 12/11/2018] [Accepted: 02/07/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVE This in vitro and in vivo study was conducted to rationalize some of traditional medicinal uses of Ailanthus altissima in gastrointestinal, respiratory, and cardiovascular systems. MATERIALS Crude extract of Ailanthus altissima (Aa.Cr) and its fractions were prepared and utilized in in vitro and in vivo studies. For in vitro studies, Aa.Cr was investigated on isolated rabbit jejunum, isolated tracheal strip, and isolated aorta of rat suspended in tissue organ bath. Platelet rich and platelet poor plasma were used to study platelet aggregation inhibitory activity. In vivo antidiarrheal effect of Aa.Cr was investigated on balb/c mice pretreated with castor oil to induce diarrhea and SD rats were used to study hypotensive activity. RESULTS Concentration dependent spasmolytic effects of Aa.Cr and its DCM fraction (Aa.DCM) were observed on spontaneous and spasmogen induced contractions in jejunum isolated from rabbit, but effect against high potassium (high-K+) induced contractions was more potent. Moreover Aa.Cr showed parallel shifting of calcium response curve to the right side. While its aqueous fraction (Aa.aq) caused spasmogenesis of isolated rabbit jejunum, this effect was blocked partially with prior administration of atropine (1μM). Concentration dependent protection against castor oil induced diarrhea was also observed. Relaxant effect was observed by the application of Aa.Cr and Aa.DCM against high-K+ and carbachol (CCh) induced contractions in tracheal strips isolated from SD rats, while Aa.Aq caused partial relaxation of high-K+ induced contractions, but no effect was observed against CCh induced contractions. Relaxation of rat aorta by the application of Aa.Cr and its fractions was also observed. Inhibition of force of contraction in rabbit atrium was also observed. Inhibition of platelet aggregation was observed against epinephrine and ADP induced aggregation. CONCLUSION Keeping in view the observed results, it is concluded that smooth muscle relaxant, platelet aggregation inhibitory and hypotensive effect may be due to the blockage of calcium channels.
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Affiliation(s)
| | - Muhammad Fawad Rasool
- Department of Pharmacy Practice, Faculty of Pharmacy, Bahauddin Zakariya University, 60800 Multan, Pakistan
| | - Imran Imran
- Department of Pharmacology, Faculty of Pharmacy, Bahauddin Zakariya University, 60800 Multan, Pakistan
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Liu W, Tian X, Wu T, Liu L, Guo Y, Wang C. PDE5A Suppresses Proteasome Activity Leading to Insulin Resistance in C2C12 Myotubes. Int J Endocrinol 2019; 2019:3054820. [PMID: 30774657 PMCID: PMC6350610 DOI: 10.1155/2019/3054820] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/30/2018] [Accepted: 11/12/2018] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVE The involvement of phosphodiesterase type 5 (PDE5) in the development of insulin resistance has been reported recently. However, the underlying molecular mechanism remains unclear. The present study aims at investigating the potential impacts of PDE5A on insulin signaling in C2C12 skeletal muscle myotubes and uncover the related mechanism. METHODS C2C12 myoblasts were differentiated into myotubes. Western blot was performed to detect the levels of proteins and phosphorylated proteins. Glucose uptake was determined by a colorimetric kit. The overexpression or knockdown of specific protein was carried out by infecting the myotubes with adenoviruses carrying cDNA or shRNA corresponding to the targeted protein, respectively. RESULTS PDE5A was demonstrated to negatively regulate insulin signaling, evidenced by the opposite effects on the suppression or enhancement of the insulin-stimulated Akt phosphorylation and 2-deoxy-D-glucose (2-DG) uptake in C2C12 myotubes, when PDE5A was overexpressed or knockdown, respectively. Interestingly, PDE5A overexpression led to significantly enhanced, while its knockdown resulted in markedly reduced, endoplasmic reticulum (ER) stress. Inhibition of ER stress improved PDE5A overexpression-induced insulin resistance. In addition, PDE5A was found to suppress proteasome activity. Inhibition of PDE5 by its selective inhibitor icariin restored PDE5A overexpression-reduced proteasome activity and mitigated PDE5A overexpression-induced ER stress. Consistently, icariin administration also markedly attenuated the detrimental impacts of PDE5A overexpression on insulin signaling. CONCLUSIONS These results suggest that PDE5A suppresses proteasome activity, which results in ER stress and subsequent insulin resistance in C2C12 myotubes.
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Affiliation(s)
- Wei Liu
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second People's Hospital of Jingzhou City, Jingzhou, 434000 Hubei, China
| | - Xiaojun Tian
- Department of Critical Care Medicine, The Second People's Hospital of Jingzhou City, Jingzhou, 434000 Hubei, China
| | - Ti Wu
- Department of Pathology, Zhongnan Hospital of Wuhan University, Wuhan, 430071 Hubei, China
| | - Le Liu
- Department of Pathology and Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071 Hubei, China
| | - Yanghongyun Guo
- Department of Pathology and Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071 Hubei, China
| | - Changhua Wang
- Department of Pathology and Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071 Hubei, China
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BOUHAFSOUN A, YILMAZ MA, BOUKELOUA A, TEMEL H, HARCHE MKAID. Simultaneous quantification of phenolic acids and flavonoids in Chamaerops humilis L. using LC–ESI-MS/MS. FOOD SCIENCE AND TECHNOLOGY 2018. [DOI: 10.1590/fst.19917] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Aicha BOUHAFSOUN
- Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf, Algérie
| | | | | | | | - Meriem KAID HARCHE
- Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf, Algérie
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31
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Kertys M, Urbanova A, Mokry J. Determination of Phosphodiesterase Inhibitors Tadalafil, Roflumilast and Roflumilast N-Oxide Using LC-MS in Guinea Pig Plasma. J Chromatogr Sci 2018; 56:948-954. [PMID: 29992297 DOI: 10.1093/chromsci/bmy072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 06/18/2018] [Indexed: 11/12/2022]
Abstract
Phosphodiesterases are known as a super-family of 11 isoenzymes, which can exert various functions based on their organ distribution. In this work, a rapid and sensitive ultra-high performance liquid chromatography-tandem mass spectrometry method was developed for quantification of tadalafil (phosphodiesterase five inhibitor), roflumilast (RF) (phosphodiesterase four inhibitor) and its active metabolite, RF N-oxide in guinea pig plasma. Chromatographic separation was carried out on UPLC BEH C18 column (2.1 mm × 50 mm, 1.7 μm) at a flow rate 0.5 mL/min, using 0.2% formic acid in acetonitrile and 0.2% formic acid in water as mobile phases within 4 min. Detection was performed using a triple quadrupole mass spectrometer employing electrospray ionization operated in positive mode using multiple reaction monitoring mode. The method utilized deuterium labeled internal standards, and was validated according to European Medicines Agency guidelines. It showed excellent linearity in the range of 0.5-500.0 ng/mL for all analytes with coefficient of determination >0.99. The intra- and inter-day precisions (relative standard deviation %) were within 6.7%, and the recoveries were greater than 73.4%. Using this method, plasma samples from experiments of phosphodiesterase four, and five inhibitors in a model of ovalbumin-induced allergic inflammation in guinea pigs were analyzed.
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Affiliation(s)
- Martin Kertys
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia.,Jessenius Faculty of Medicine in Martin, Biomedical Center Martin, Comenius University in Bratislava, Slovakia
| | - Anna Urbanova
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia.,Jessenius Faculty of Medicine in Martin, Biomedical Center Martin, Comenius University in Bratislava, Slovakia
| | - Juraj Mokry
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia.,Jessenius Faculty of Medicine in Martin, Biomedical Center Martin, Comenius University in Bratislava, Slovakia
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Li M, Zhang Y, Cao Y, Zhang D, Liu L, Guo Y, Wang C. Icariin Ameliorates Palmitate-Induced Insulin Resistance Through Reducing Thioredoxin-Interacting Protein (TXNIP) and Suppressing ER Stress in C2C12 Myotubes. Front Pharmacol 2018; 9:1180. [PMID: 30459603 PMCID: PMC6232724 DOI: 10.3389/fphar.2018.01180] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Accepted: 09/28/2018] [Indexed: 12/23/2022] Open
Abstract
Both thioredoxin-interacting protein (TXNIP) and endoplasmic reticulum (ER) stress are implicated in skeletal muscle insulin resistance. Icariin has been found to mimic insulin action in normal skeletal muscle C2C12 cells and display anti-diabetic properties in diet-induced obese mice. However, the underlying molecular mechanism remains to be well-established. Herein, we tested the hypothesis that the protective effects of icariin on free fatty acid-induced insulin resistance were attributed to its regulation on TXNIP protein levels and ER stress in skeletal muscle cells. We found that TXNIP mediated the saturated fatty acid palmitate (PA)-induced insulin resistance in C2C12 myotubes. Icariin treatment significantly restored PA-reduced proteasome activity resulting in reduction of TXNIP protein and suppression of ER stress, as well as improvement of insulin sensitivity. Proteasome inhibition by its specific inhibitor MG132 obviously abolished the inhibitory effect of icariin on PA-induced insulin resistance. In addition, MG132 supplementation markedly abrogated the impacts of icariin on ER stress and TXNIP-mediated downstream events such as inflammation and STAT3 phosphorylation. These results clearly indicate that icariin improves PA-induced skeletal muscle insulin resistance through a proteasome-dependent mechanism, by which icariin downregulats TXNIP levels and inhibits ER stress.
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Affiliation(s)
| | | | | | | | | | | | - Changhua Wang
- Department of Pathology and Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China
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Quality of reporting of randomized controlled trials of herbal medicines conducted in metabolic disorders in Middle East countries: A systematic review. Complement Ther Med 2018; 38:61-66. [PMID: 29857881 DOI: 10.1016/j.ctim.2018.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/11/2018] [Indexed: 01/31/2023] Open
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Ademiluyi AO. Local condiments from fermented tropical legume seeds modulate activities of critical enzymes relevant to cardiovascular diseases and endothelial function. Food Sci Nutr 2018; 6:602-608. [PMID: 29876111 PMCID: PMC5980267 DOI: 10.1002/fsn3.582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 11/09/2017] [Accepted: 11/21/2017] [Indexed: 01/14/2023] Open
Abstract
Investigation into modulatory effects of local condiments produced from fermented legume (African locust bean and soybean) seeds on activities of enzymes relevant to endothelial function and cardiovascular disease (arginase, phosphodiesterase-5, acetylcholinesterase, and, ecto 5'-nucleotidase) in vitro was the focus of this study. The condiments were prepared according to traditional methods of fermentation. Thereafter, modulatory effects of aqueous extracts from the condiments on activities of the enzymes were subsequently carried out. Results showed the extracts significantly inhibited activities of arginase, phosphodiesterase-5 and acetylcholinesterase, while the activity of ecto 5'-nucleotidase was stimulated at sample concentrations tested. Thus, the observed enzyme modulatory properties exhibited by the condiments could be novel mechanisms to support their use as functional foods and nutraceuticals for the management of cardiovascular disease and associated endothelial dysfunction.
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35
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Santillo MF, Mapa MST. Phosphodiesterase (PDE5) inhibition assay for rapid detection of erectile dysfunction drugs and analogs in sexual enhancement products. Drug Test Anal 2018; 10:1315-1322. [PMID: 29488328 DOI: 10.1002/dta.2375] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 02/16/2018] [Accepted: 02/17/2018] [Indexed: 02/28/2024]
Abstract
Products marketed as dietary supplements for sexual enhancement are frequently adulterated with phosphodiesterase-5 (PDE5) inhibitors, which are erectile dysfunction drugs or their analogs that can cause adverse health effects. Due to widespread adulteration, a rapid screening assay was developed to detect PDE5 inhibitors in adulterated products. The assay employs fluorescence detection and is based on measuring inhibition of PDE5 activity, the pharmacological mechanism shared among the adulterants. Initially, the assay reaction scheme was established and characterized, followed by analysis of 9 representative PDE5 inhibitors (IC50 , 0.4-4.0 ng mL-1 ), demonstrating sensitive detection in matrix-free solutions. Next, dietary supplements serving as matrix blanks (n = 25) were analyzed to determine matrix interference and establish a threshold value; there were no false positives. Finally, matrix blanks were spiked with 9 individual PDE5 inhibitors, along with several mixtures. All 9 adulterants were successfully detected (≤ 5 % false negative rate; n = 20) at a concentration of 1.00 mg g-1 , which is over 5 times lower than concentrations commonly encountered in adulterated products. A major distinction of the PDE5 inhibition assay is the ability to detect adulterants without prior knowledge of their chemical structures, demonstrating a broad-based detection capability that can address a continuously evolving threat of new adulterants. The PDE5 inhibition assay can analyze over 40 samples simultaneously within 15 minutes and involves a single incubation step and simple data analysis, all of which are advantageous for combating the widespread adulteration of sex-enhancement products.
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Affiliation(s)
- Michael F Santillo
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Laurel, Maryland, USA
| | - Mapa S T Mapa
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Laurel, Maryland, USA
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Yakubu MT, Atoyebi AR. Brysocarpus coccineus (Schum & Thonn) root reinstates sexual competence and testicular function in paroxetine-induced sexual dysfunction in male Wistar rats. Andrologia 2018; 50:e12980. [PMID: 29468717 DOI: 10.1111/and.12980] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2017] [Indexed: 01/23/2023] Open
Abstract
The effects of aqueous extract of Brysocarpus coccineus roots (AEBCR) were studied on sexual behaviour and testicular function of paroxetine-induced sexual dysfunction (SD) in male rats. Ninety, sexually matured male rats (150.88 ± 5.53 g) were assigned into two groups: A and B. Fifteen SD animals from group B were each allotted to B1, B2, B3, B4 and B5 and received distilled water (DW), Powmax M (7.14 mg/kg body weight, b.w.) 50, 100 and 150 mg/kg b.w of AEBCR, respectively, for 7 days while the non-SD animals (group A) received DW. Eleven secondary metabolites were present in AEBCR. The lowered (p < .05) ejaculation frequency, penile erection index and penile grooming, higher mount and intromission frequencies, prolonged (p < .05) latencies of mount, intromission, ejaculation, and post-ejaculatory interval, reduced (p < .05) serum luteinising hormone, follicle stimulating hormone, testosterone, nitric oxide and testicular function indices, degenerated seminiferous tubules and low luminal spermatozoa contents by paroxetine were significantly (p < .05) attenuated and/or reinstated by AEBCR and Powmax M. The restoration of androgen-dependent sexual and testicular functions in SD male rats by AEBCR validates its folkloric use as aphrodisiac. Clinical studies are desirable to ascertain the efficacy of AEBCR in SD.
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Affiliation(s)
- M T Yakubu
- Phytopharmacology, Toxicology and Reproductive Biochemistry Research Laboratory, Department of Biochemistry, University of Ilorin, Ilorin, Kwara State, Nigeria
| | - A R Atoyebi
- Phytopharmacology, Toxicology and Reproductive Biochemistry Research Laboratory, Department of Biochemistry, University of Ilorin, Ilorin, Kwara State, Nigeria
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Wahab A, Jan SA, Rauf A, Rehman ZU, Khan Z, Ahmed A, Syed F, Safi SZ, Khan H, Imran M. Phytochemical composition, biological potential and enzyme inhibition activity of Scandix pecten-veneris L. J Zhejiang Univ Sci B 2018; 19:120-129. [PMID: 29405040 PMCID: PMC5833326 DOI: 10.1631/jzus.b1600443] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 05/04/2017] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Scandix pecten-veneris L. is a less studied wild edible herb and is considered an extinct plant species in many parts of the world. This study was designed to evaluate its phytochemical composition and biological potential of S. pecten-veneris L. METHODS Phytochemicals including alkaloids, flavonoids, polyphenols, and tannins were determined in extracts of S. pecten-veneris. Antioxidant activity was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH), while reducing power was tested by ferric reducing/antioxidant power (FRAP) assay. Antimicrobial activity against seven bacterial and four fungal strains was evaluated using agar well diffusion assay. Enzymes inhibition study was performed for urease, phosphodiesterase-I, and catalase-II. RESULTS S. pecten-veneris showed moderate antiradical activity and reducing potential of hydroxyl radicals to about 20% of the initial value. The antioxidant activity of various extracts of S. pecten-veneris showed a linear correlation with total phenolic contents in the order of water>n-butanol>chloroform>ethyl acetate>methanol extracts. S. pecten-veneris leaves showed the highest inhibitory activity against Staphylococcus aureus while the highest antifungal activity was observed against Candida albicans. The plant extract was most potent against urease enzymes but showed moderate activity against phosphodiestrase-I and carbonic anhydrase-II. CONCLUSIONS Our data demonstrate that in addition to its culinary uses, S. pecten-veneris has good medicinal potential and hence could be used for treating some specific health ailments.
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Affiliation(s)
- Abdul Wahab
- Department of Chemistry, Islamia College University, Peshawar-25120 KP, Pakistan
| | - Syed Aleem Jan
- Biochemistry Section Institute of Chemical Sciences, University of Peshawar, Peshawar-25120 KP, Pakistan
| | - Abdur Rauf
- Department of Chemistry, University of Swabi, Anbar-23561 KP, Pakistan
| | - Zia ur Rehman
- Department of Botany, Islamia College University, Peshawar-25120 KP, Pakistan
| | - Zahid Khan
- Biochemistry Section Institute of Chemical Sciences, University of Peshawar, Peshawar-25120 KP, Pakistan
| | - Aftab Ahmed
- State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Fatima Syed
- Biochemistry Section Institute of Chemical Sciences, University of Peshawar, Peshawar-25120 KP, Pakistan
| | - Sher Zaman Safi
- Interdisciplinary Research Center in Biomedical Materials, COMSATS Institute of Information Technology, Lahore-54000, Pakistan
| | - Hamayun Khan
- Department of Chemistry, Islamia College University, Peshawar-25120 KP, Pakistan
| | - Muhammad Imran
- Biochemistry Section Institute of Chemical Sciences, University of Peshawar, Peshawar-25120 KP, Pakistan
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Ademosun AO, Oboh G, Olasehinde TA, Adeoyo OO. From folk medicine to functional food: a review on the bioactive components and pharmacological properties of citrus peels. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s13596-017-0292-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Torres-Martínez R, García-Rodríguez YM, Ríos-Chávez P, Saavedra-Molina A, López-Meza JE, Ochoa-Zarzosa A, Garciglia RS. Antioxidant Activity of the Essential Oil and its Major Terpenes of Satureja macrostema (Moc. and Sessé ex Benth.) Briq. Pharmacogn Mag 2018; 13:S875-S880. [PMID: 29491647 PMCID: PMC5822514 DOI: 10.4103/pm.pm_316_17] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 08/22/2017] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND The aim of this study was to investigate the in vitro antioxidant activity of Satureja macrostema (Moc. and Sessé ex Benth.) Briq. (Lamiaceae) essential oil, a Mexican medicinal plant known as nurite. MATERIALS AND METHODS Fresh aerial parts of S. macrostema plants cultivated in greenhouse for 3 months were subjected to hydrodistillation in a Clevenger apparatus to obtain essential oil. Volatile compounds were identified by gas chromatography (GC) and GC/mass spectrometry. Antioxidant effectiveness of essential oil and its major terpenes of S. macrostema was examined by three different radical scavenging methods: 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS), and total antioxidant capacity (TAC). The concentrations tested were 0.001, 0.01, 0.1, and 1 mg/mL. RESULTS The major volatile compounds were caryophyllene, limonene, linalool, pulegone, menthone, and thymol. S. macrostema essential oil showed the highest free radical scavenging activity with DPPH and ABTS methods (53.10% and 92.12%, respectively) at 1 mg/mL and 98% with TAC method at 0.1 mg/mL. Thymol exerted the highest antioxidant capacity with 0.1 mg/mL, reaching 83.38%, 96.96%, and 98.57% by DPPH, ABTS, and TAC methods. Caryophyllene, limonene, linalool, pulegone, and menthone exhibited an antioxidant capacity <25% with the DPPH and ABTS methods; however, limonene showed a TAC of 85.41% with 0.01 mg/mL. CONCLUSION The essential oil of S. macrostema and thymol showed a free radical scavenging activity close to that of the synthetic butylated hydroxytoluene. SUMMARY The major volatile compounds of essential oil of Satureja macrostema were caryophyllene, limonene, linalool, pulegone, menthone and thymolThe essential oil of S. macrostema showed a high free radical scavengingThymol exerted the highest antioxidant capacity by DPPH, ABTS and TAC methods. Abbreviations used: GC: Gas Chromatography; DPPH: 2,2-diphenyl-1-picrylhydrazyl; ABTS: 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid; TAC: Total antioxidant capacity.
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Affiliation(s)
- Rafael Torres-Martínez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo (UMSNH), Morelia, México
| | | | | | - Alfredo Saavedra-Molina
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo (UMSNH), Morelia, México
| | | | | | - Rafael Salgado Garciglia
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo (UMSNH), Morelia, México
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Momtaz S, Hassani S, Khan F, Ziaee M, Abdollahi M. Cinnamon, a promising prospect towards Alzheimer's disease. Pharmacol Res 2017; 130:241-258. [PMID: 29258915 DOI: 10.1016/j.phrs.2017.12.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 12/10/2017] [Accepted: 12/10/2017] [Indexed: 12/25/2022]
Abstract
Over the last decades, an exponential increase of efforts concerning the treatment of Alzheimer's disease (AD) has been practiced. Phytochemicals preparations have a millenary background to combat various pathological conditions. Various cinnamon species and their biologically active ingredients have renewed the interest towards the treatment of patients with mild-to-moderate AD through the inhibition of tau protein aggregation and prevention of the formation and accumulation of amyloid-β peptides into the neurotoxic oligomeric inclusions, both of which are considered to be the AD trademarks. In this review, we presented comprehensive data on the interactions of a number of cinnamon polyphenols (PPs) with oxidative stress and pro-inflammatory signaling pathways in the brain. In addition, we discussed the potential association between AD and diabetes mellitus (DM), vis-à-vis the effluence of cinnamon PPs. Further, an upcoming prospect of AD epigenetic pathophysiological conditions and cinnamon has been sighted. Data was retrieved from the scientific databases such as PubMed database of the National Library of Medicine, Scopus and Google Scholar without any time limitation. The extract of cinnamon efficiently inhibits tau accumulations, Aβ aggregation and toxicity in vivo and in vitro models. Indeed, cinnamon possesses neuroprotective effects interfering multiple oxidative stress and pro-inflammatory pathways. Besides, cinnamon modulates endothelial functions and attenuates the vascular cell adhesion molecules. Cinnamon PPs may induce AD epigenetic modifications. Cinnamon and in particular, cinnamaldehyde seem to be effective and safe approaches for treatment and prevention of AD onset and/or progression. However, further molecular and translational research studies as well as prolonged clinical trials are required to establish the therapeutic safety and efficacy in different cinnamon spp.
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Affiliation(s)
- Saeideh Momtaz
- Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran; Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Shokoufeh Hassani
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Fazlullah Khan
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran Iran
| | - Mojtaba Ziaee
- Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran; Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Abdollahi
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran Iran.
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Schnuck JK, Gould LM, Parry HA, Johnson MA, Gannon NP, Sunderland KL, Vaughan RA. Metabolic effects of physiological levels of caffeine in myotubes. J Physiol Biochem 2017; 74:35-45. [PMID: 29198059 DOI: 10.1007/s13105-017-0601-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/23/2017] [Indexed: 12/11/2022]
Abstract
Caffeine has been shown to stimulate multiple major regulators of cell energetics including AMP-activated protein kinase (AMPK) and Ca2+/calmodulin-dependent protein kinase II (CaMKII). Additionally, caffeine induces peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) and mitochondrial biogenesis. While caffeine enhances oxidative metabolism, experimental concentrations often exceed physiologically attainable concentrations through diet. This work measured the effects of low-level caffeine on cellular metabolism and gene expression in myotubes, as well as the dependence of caffeine's effects on the nuclear receptor peroxisome proliferator-activated receptor beta/delta (PPARβ/δ). C2C12 myotubes were treated with various doses of caffeine for up to 24 h. Gene and protein expression were measured via qRT-PCR and Western blot, respectively. Cellular metabolism was determined via oxygen consumption and extracellular acidification rate. Caffeine significantly induced regulators of mitochondrial biogenesis and oxidative metabolism. Mitochondrial staining was suppressed in PPARβ/δ-inhibited cells which was rescued by concurrent caffeine treatment. Caffeine-treated cells also displayed elevated peak oxidative metabolism which was partially abolished following PPARβ/δ inhibition. Similar to past observations, glucose uptake and GLUT4 content were elevated in caffeine-treated cells, however, glycolytic metabolism was unaltered following caffeine treatment. Physiological levels of caffeine appear to enhance cell metabolism through mechanisms partially dependent on PPARβ/δ.
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Affiliation(s)
- Jamie K Schnuck
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
- School of Medicine, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Lacey M Gould
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Hailey A Parry
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
- School of Kinesiology, Auburn University, Auburn, AL, 36849, USA
| | - Michele A Johnson
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Nicholas P Gannon
- School of Medicine, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Kyle L Sunderland
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Roger A Vaughan
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA.
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Kubota K, Fukue H, Sato H, Hashimoto K, Fujikane A, Moriyama H, Watanabe T, Katsurabayashi S, Kainuma M, Iwasaki K. The Traditional Japanese Herbal Medicine Hachimijiogan Elicits Neurite Outgrowth Effects in PC12 Cells and Improves Cognitive in AD Model Rats via Phosphorylation of CREB. Front Pharmacol 2017; 8:850. [PMID: 29209220 PMCID: PMC5702328 DOI: 10.3389/fphar.2017.00850] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 11/07/2017] [Indexed: 01/23/2023] Open
Abstract
Hachimijiogan (HJG) is a traditional herbal medicine that improves anxiety disorders in patients with dementia. In this study, we tested the hypothesis that HJG exerts neurotrophic factor-like effects to ameliorate memory impairment in Alzheimer disease (AD) model rats. First, we describe that HJG acts to induce neurite outgrowth in PC12 cells (a rat pheochromocytoma cell line) like nerve growth factor (NGF) in a concentration-dependent manner (3 μg/ml HJG, p < 0.05; 10–500 μg/ml HJG, p < 0.001). While six herbal constituents of HJG, Rehmannia root, Dioscorea rhizome, Rhizoma Alismatis, Poria sclerotium, Moutan bark, and Cinnamon bark, could induce neurite outgrowth effects, the effect was strongest with HJG (500 μg/ml). Second, we demonstrated that HJG-induced neurite outgrowth was blocked by an inhibitor of cAMP response element binding protein (CREB), KG-501 (10 μM, p < 0.001). Moreover, HJG was observed to induce CREB phosphorylation 20–90 min after treatment (20 min, 2.50 ± 0.58-fold) and CRE-mediated transcription in cultured PC12 cells (500 μg/ml, p < 0.01; 1000 μg/ml, p < 0.001). These results suggest a CREB-dependent mechanism underlies the neurotrophic effects of HJG. Finally, we examined improvements of memory impairment following HJG treatment using a Morris water maze in AD model animals (CI + Aβ rats). Repeated oral administration of HJG improved memory impairment (300 mg/kg, p < 0.05; 1000 mg/kg, p < 0.001) and induced CREB phosphorylation within the hippocampus (1000 mg/kg, p < 0.01). Together, our results suggest that HJG possesses neurotrophic effects similar to those of NGF, and can ameliorate cognitive dysfunction in a rat dementia model via CREB activation. Thus, HJG could potentially be a substitute for neurotrophic factors as a treatment for dementia.
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Affiliation(s)
- Kaori Kubota
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.,Institute for Aging and Brain Sciences, Fukuoka University, Fukuoka, Japan
| | - Haruka Fukue
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan
| | - Hitomi Sato
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan
| | - Kana Hashimoto
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan
| | - Aya Fujikane
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan
| | - Hiroshi Moriyama
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan
| | - Takuya Watanabe
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.,Institute for Aging and Brain Sciences, Fukuoka University, Fukuoka, Japan
| | - Shutaro Katsurabayashi
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan
| | - Mosaburo Kainuma
- Community Medicine Education Unit, Department of Clinical Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Katsunori Iwasaki
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.,Institute for Aging and Brain Sciences, Fukuoka University, Fukuoka, Japan
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Fan HT, Guo JF, Zhang YX, Gu YX, Ning ZQ, Qiao YJ, Wang X. The rational search for PDE10A inhibitors from Sophora flavescens roots using pharmacophore‑ and docking‑based virtual screening. Mol Med Rep 2017; 17:388-393. [PMID: 29115449 DOI: 10.3892/mmr.2017.7871] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Accepted: 08/31/2017] [Indexed: 11/06/2022] Open
Abstract
Phosphodiesterase 10A (PDE10A) has been confirmed to be an important target for the treatment of central nervous system (CNS) disorders. The purpose of the present study was to identify PDE10A inhibitors from herbs used in traditional Chinese medicine. Pharmacophore and molecular docking techniques were used to virtually screen the chemical molecule database of Sophora flavescens, a well‑known Chinese herb that has been used for improving mental health and regulating the CNS. The pharmacophore model generated recognized the common functional groups of known PDE10A inhibitors. In addition, molecular docking was used to calculate the binding affinity of ligand‑PDE10A interactions and to investigate the possible binding pattern. Virtual screening based on the pharmacophore model and molecular docking was performed to identify potential PDE10A inhibitors from S. flavescens. The results demonstrated that nine hits from S. flavescens were potential PDE10A inhibitors, and their biological activity was further validated using literature mining. A total of two compounds were reported to inhibit cyclic adenosine monophosphate phosphodiesterase, and one protected against glutamate‑induced oxidative stress in the CNS. The remaining six compounds require further bioactivity validation. The results of the present study demonstrated that this method was a time‑ and cost‑saving strategy for the identification of bioactive compounds from traditional Chinese medicine.
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Affiliation(s)
- Han-Tian Fan
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, P.R. China
| | - Jun-Fang Guo
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, P.R. China
| | - Yu-Xin Zhang
- Key Laboratory of TCM‑Information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, P.R. China
| | - Yu-Xi Gu
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, P.R. China
| | - Zhong-Qi Ning
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, P.R. China
| | - Yan-Jiang Qiao
- Key Laboratory of TCM‑Information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, P.R. China
| | - Xing Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, P.R. China
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Abusnina A, Lugnier C. Therapeutic potentials of natural compounds acting on cyclic nucleotide phosphodiesterase families. Cell Signal 2017; 39:55-65. [PMID: 28754627 DOI: 10.1016/j.cellsig.2017.07.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 07/12/2017] [Accepted: 07/20/2017] [Indexed: 12/12/2022]
Abstract
Intracellular cyclic AMP and/or cyclic GMP are characterized in the 1960th. These second messengers, hydrolysed specifically by cyclic nucleotide phosphodiesterase (PDE), play a major role in intracellular signalling. Natural products have been a rich source of drug discovery, Theophylline and Methylxanthine originated from tea leaves used for asthma treatment, whereas, Papaverine, a natural isoquinolein originated from Papaver somniferum traditionally used in impotency, altogether as caffeine where firstly described as PDE-inhibiting compounds. Since that time, the knowledge in PDE field has been drastically increased, allowing the design and development of new therapeutic drugs acting against different pathologies in the nanomolar range. During this period some natural compounds have been identified as PDE inhibitors and used in that context to investigate their therapeutic potential effects. The aim of this literature review is to point out the reported data and demonstrating the contribution of natural characterized molecules as PDE inhibitors in various pathologies that can open new fields of research for drug discovery, notably in epigenetic regulation.
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Mehriardestani M, Aliahmadi A, Toliat T, Rahimi R. Medicinal plants and their isolated compounds showing anti- Trichomonas vaginalis - activity. Biomed Pharmacother 2017; 88:885-893. [DOI: 10.1016/j.biopha.2017.01.149] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 01/19/2017] [Accepted: 01/26/2017] [Indexed: 12/16/2022] Open
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Saravani R, Galavi HR, Shahraki A. Inhibition of Phosphodiesterase 5 and Increasing the Level of Cyclic Guanosine 3',5' Monophosphate by Hydroalcoholic Achillea wilhelmsii C. Koch Extract in Human Breast Cancer Cell Lines MCF-7 and MDA-Mb-468. Breast Cancer (Auckl) 2017; 11:1178223417690178. [PMID: 28469435 PMCID: PMC5391053 DOI: 10.1177/1178223417690178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 01/02/2017] [Indexed: 12/18/2022] Open
Abstract
This study aimed to investigate the effect of hydroalcoholic Achillea wilhelmsii C. Koch extract (HAWE) on phosphodiesterase 5 (PDE5) gene expression and cyclic guanosine 3',5' monophosphate (cGMP) signaling in the MCF-7 and MDA-Mb-468 cell lines. The effective dose (ED50) of HAWE was examined in both cell lines using a 3-(4,5-dimethylhiazol-2-yl)-2,5-diphenyltetrazolium bromide viability test, and the type of cell death was detected by flow cytometry. The expression of PDE5 and the concentration of cGMP were measured in a time-dependent manner in the ED50 by real-time polymerase chain reaction and a colorimetric assay, respectively. Treatment with HAWE showed 25 µg/mL to be the ED50 for both cell lines, and HAWE led to a reduction in the PDE5 messenger RNA expression. The intracellular cGMP increased in a time-dependent manner. The results showed that HAWE has an antiproliferative property in MCF-7 and MDA-Mb-468 cell lines through the cGMP pathway. Therefore, HAWE is a potential source to effectively isolate inhibitory PDE5.
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Affiliation(s)
- Ramin Saravani
- Cellular and Molecular Research Center, Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Hamid Reza Galavi
- Cellular and Molecular Research Center, Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Ali Shahraki
- Department of Biology, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran
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Campen KA, McNatty KP, Pitman JL. A protective role of cumulus cells after short-term exposure of rat cumulus cell-oocyte complexes to lifestyle or environmental contaminants. Reprod Toxicol 2017; 69:19-33. [PMID: 28087314 DOI: 10.1016/j.reprotox.2017.01.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 01/05/2017] [Indexed: 01/07/2023]
Abstract
Ovarian follicular fluid provides a potential reservoir for exogenous compounds that may adversely affect oocyte quality. This study examined the effects of common lifestyle and environmental contaminants, namely bisphenol-A (BPA), caffeine, 3,4-methylenedioxymethamphetamine (MDMA), nicotine and Δ9-tetrahydrocannabinol (THC) on gap junction genes (Gja1, Gja4) and proteins (GJA1), glucose metabolism genes (Gfpt1, Pfkp) and oocyte growth factor genes (Bmp15, Gdf9), as well as gap junction transfer rate, in rat cumulus-oocyte complexes (COCs). In vitro exposure to MDMA and THC accelerated the timing of meiotic resumption and all contaminants altered either gap junction gene expression (BPA, caffeine, MDMA and THC) or transfer rate (BPA and nicotine). In vitro exposure of COCs to MDMA also altered glucose metabolism genes. Overall, oocyte-derived genes were largely unaffected following exposure to any contaminant. In summary, the impact of short-term exposure to lifestyle and environmental contaminants on oocyte function may be diminished due to protective properties of cumulus cells.
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Affiliation(s)
- Kelly A Campen
- School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand
| | - Kenneth P McNatty
- School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand
| | - Janet L Pitman
- School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand.
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Abstract
Boesenbergia rotunda (Family: Zingiberaceae) as known as fingerroot is a daily food ingredient and traditional medicinal plant in Southeast Asia and Indo-China. It has been shown to possess anti-allergic, antibacterial, anticancer, anti-inflammatory, antioxidant, and antiulcer activities and also shown wound healing. Its common phytochemical components include alkaloids, essential oils, flavonoids, and phenolics. This plant is rich in boesenbergin, krachaizin, panduratin, and pinostrobin, all of which has been reported to contribute to its remedial properties including aphrodisiac property. Based on established literature on the aphrodisiac property of B. rotunda and possible mode of action, this review article has attempted to compile that B. rotunda could be further explored for the development of potential aphrodisiac treatment.
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Affiliation(s)
- Oranun Ongwisespaiboon
- Mahidol University International College, Mahidol University, Salaya Campus, Nakhon Pathom 73170, Thailand
| | - Wannee Jiraungkoorskul
- Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
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Shen K, Johnson DW, Gobe GC. The role of cGMP and its signaling pathways in kidney disease. Am J Physiol Renal Physiol 2016; 311:F671-F681. [PMID: 27413196 DOI: 10.1152/ajprenal.00042.2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 07/10/2016] [Indexed: 01/20/2023] Open
Abstract
Cyclic nucleotide signal transduction pathways are an emerging research field in kidney disease. Activated cell surface receptors transduce their signals via intracellular second messengers such as cAMP and cGMP. There is increasing evidence that regulation of the cGMP-cGMP-dependent protein kinase 1-phosphodiesterase (cGMP-cGK1-PDE) signaling pathway may be renoprotective. Selective PDE5 inhibitors have shown potential in treating kidney fibrosis in patients with chronic kidney disease (CKD), via their downstream signaling, and these inhibitors also have known activity as antithrombotic and anticancer agents. This review gives an outline of the cGMP-cGK1-PDE signaling pathways and details the downstream signaling and regulatory functions that are modulated by cGK1 and PDE inhibitors with regard to antifibrotic, antithrombotic, and antitumor activity. Current evidence that supports the renoprotective effects of regulating cGMP-cGK1-PDE signaling is also summarized. Finally, the effects of icariin, a natural plant extract with PDE5 inhibitory function, are discussed. We conclude that regulation of cGMP-cGK1-PDE signaling might provide novel, therapeutic strategies for the worsening global public health problem of CKD.
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Affiliation(s)
- Kunyu Shen
- Centre for Kidney Disease Research, School of Medicine, Translational Research Institute, The University of Queensland, Brisbane, Australia; Second School of Clinical Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China; and
| | - David W Johnson
- Centre for Kidney Disease Research, School of Medicine, Translational Research Institute, The University of Queensland, Brisbane, Australia; Department of Nephrology, Princess Alexandra Hospital, Brisbane, Australia
| | - Glenda C Gobe
- Centre for Kidney Disease Research, School of Medicine, Translational Research Institute, The University of Queensland, Brisbane, Australia;
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A mechanistic approach for modulation of chlorpyrifos-induced toxicity in human lymphocytes by melatonin, coenzyme Q10, and vinpocetine. Hum Exp Toxicol 2016; 35:839-50. [DOI: 10.1177/0960327115607945] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Background: Chlorpyrifos (CP) is an organophosphorus pesticide that induces oxidative stress through the production of free radicals and depletes intracellular antioxidant reserves. In this study, the efficacy of three antioxidants (melatonin, coenzyme Q10 (CoQ10), and vinpocetine) on alleviation of toxic effects of CP was evaluated. Materials and Methods: Cytotoxicity of CP, in the presence or absence of effective doses of melatonin, CoQ10, and vinpocetine, was determined in human peripheral blood lymphocytes after 72-h exposure. The levels of acetylcholinesterase (AChE) activity along with tumor necrosis factor α (TNF-α), as inflammatory index, were measured. Further, the viability and oxidative stress markers including cellular mitochondrial activity, cell death modes (apoptosis vs. necrosis), total antioxidant power (TAP), total thiol molecules (TTM), lipid peroxidation (LPO), and myeloperoxidase (MPO) activity were measured. Results: CoQ10 and also the combination of the three antioxidants were the most notable in opposing toxicity of CP and led to increasing TAP and TTM; improvement of AChE activity; and lowering LPO, MPO, TNF-α, and apoptosis compared to CP alone. Conclusion: CP toxicity overwhelms the intracellular antioxidant defense mechanisms. Exogenous supplementation with antioxidants, such as the ones we have investigated, seems to be effective in the prevention of cytotoxicity of CP.
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