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Zhou Y, Yao L, Huang X, Li Y, Wang C, Huang Q, Yu L, Pan C. Transcriptomics and metabolomics association analysis revealed the responses of Gynostemma pentaphyllum to cadmium. FRONTIERS IN PLANT SCIENCE 2023; 14:1265971. [PMID: 37877087 PMCID: PMC10591085 DOI: 10.3389/fpls.2023.1265971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/22/2023] [Indexed: 10/26/2023]
Abstract
Gynostemma pentaphyllum an important medicinal herb, can absorb high amounts of cadmium (Cd) which can lead to excessive Cd contamination during the production of medicines and tea. Hence, it is crucial to investigate the response mechanism of G. pentaphyllum under Cd stress to develop varieties with low Cd accumulation and high tolerance. Physiological response analysis, transcriptomics and metabolomics were performed on G. pentaphyllum seedlings exposed to Cd stress. Herein, G. pentaphyllum seedlings could significantly enhance antioxidant enzyme activities (POD, CAT and APX), proline and polysaccharide content subject to Cd stress. Transcriptomics analysis identified the secondary metabolites, carbohydrate metabolism, amino acid metabolism, lipid metabolism, and signal transduction pathways associated with Cd stress, which mainly involved the XTH, EXP and GST genes. Metabolomics analysis identified 126 differentially expressed metabolites, including citric acid, flavonoid and amino acids metabolites, which were accumulated under Cd stress. Multi-omics integrative analysis unraveled that the phenylpropanoid biosynthesis, starch, and sucrose metabolism, alpha-linolenic acid metabolism, and ABC transporter were significantly enriched at the gene and metabolic levels in response to Cd stress in G. pentaphyllum. In conclusion, the genetic regulatory network sheds light on Cd response mechanisms in G. pentaphyllum.
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Affiliation(s)
- Yunyi Zhou
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
| | - Lixiang Yao
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
| | - Xueyan Huang
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
| | - Ying Li
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
| | - Chunli Wang
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
| | - Qinfen Huang
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
| | - Liying Yu
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
| | - Chunliu Pan
- Guangxi Traditional Chinese Medicine (TCM) Resources General Survey and Data Collection Key Laboratory, the Center for Phylogeny and Evolution of Medicinal Plants, National Center for TCM Inheritance and Innovation, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- National Engineering Research Center for Southwest Endangered Medicinal Materials Resources Development, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
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Huang YP, Wang YS, Liu YY, Jiang CH, Wang J, Jiang XY, Liu BW, Wang L, Ye WC, Zhang J, Yin ZQ, Pan K. Chemical Characterization and Atherosclerosis Alleviation Effects of Gypenosides from Gynostemma pentaphyllum through Ameliorating Endothelial Dysfunction via the PCSK9/LOX-1 Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:11944-11957. [PMID: 36120893 DOI: 10.1021/acs.jafc.2c02681] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Dietary saponins have the potential to ameliorate atherosclerosis (AS). Gypenosides of Gynostemma pentaphyllum (GPs) have been used as functional foods to exhibit antiatherosclerotic activity. The present study aimed to explore the protective effect, underlying mechanism and active substances of GPs on AS in vivo and in vitro. Results demonstrated GPs administration reduced the serum concentrations of TC and LDL-C, upregulated the plasma HDL-C content, inhibited the secretion of ICAM-1, VCAM-1, and MCP-1, and alleviated vascular lesions in VitD3 plus high cholesterol diet-induced AS rats as well as reduced adhesion factors levels in ox-LDL-stimulated HUVECs, which was potentially associated with suppressing PCSK9/LOX-1 pathway. Further activity-guided phytochemical investigation of GPs led to the identification of five new dammarane-type glycosides (1-5) and ten known analogs (6-15). Bioassay evaluation showed compounds 1, 6, 7, 12, 13, and 14 observably reduced the expressions of PCSK9 and LOX-1, as well as the secretion of adhesion factors in injured HUVECs. Molecular docking experiments suggested that the active saponins of GPs might bind to the allosteric pocket of PCSK9 located at the catalytic and C-terminal domains, and 2α-OH-protopanaxadiol-type gypenosides might exert a higher affinity for an allosteric binding site on PCSK9 by hydrogen-bond interaction with ARG-458. These findings provide new insights into the potential nutraceutical application of GPs and their bioactive compounds in the prevention and discovery of novel therapeutic strategies for AS.
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Affiliation(s)
- Ya-Ping Huang
- Department of TCMs Pharmaceuticals & Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Yun-Shan Wang
- Department of TCMs Pharmaceuticals & Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- Nephrology Department, Nanjing Lishui District Hospital of Traditional Chinese Medicine, Nanjing 211200, China
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Yuan-Yuan Liu
- Nephrology Department, Nanjing Lishui District Hospital of Traditional Chinese Medicine, Nanjing 211200, China
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Cui-Hua Jiang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Jie Wang
- Instrumental Analysis Center of CPU, China Pharmaceutical University, Nanjing 210009, China
| | - Xin-Yu Jiang
- Hunan Huabaotong Pharmaceutical Co., Ltd., Changsha 410331, China
| | - Bi-Wen Liu
- Nephrology Department, Nanjing Lishui District Hospital of Traditional Chinese Medicine, Nanjing 211200, China
| | - Lei Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Jian Zhang
- Nephrology Department, Nanjing Lishui District Hospital of Traditional Chinese Medicine, Nanjing 211200, China
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Zhi-Qi Yin
- Department of TCMs Pharmaceuticals & Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Ke Pan
- Department of TCMs Pharmaceuticals & Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
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Zhai XF, Zu ML, Wang YR, Cui WY, Duan Y, Yang C, Piao XL. Protective effects of four new saponins from Gynostemma pentaphyllum against hydrogen peroxide-induced neurotoxicity in SH-SY5Y cells. Bioorg Chem 2020; 106:104470. [PMID: 33213892 DOI: 10.1016/j.bioorg.2020.104470] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/05/2020] [Accepted: 11/07/2020] [Indexed: 10/23/2022]
Abstract
Gynostemma pentaphyllum has been used as a medicine-food homologious health product in China for a long time. This research aimed to isolate and identify its active compounds with protective effects against hydrogen peroxide induced SH-SY5Y cell death. Four new dammarane-type saponins were isolated from G. pentaphyllum using various chromatographic methods. They were identified as gypenoside S1 (1), gypenoside S3 (2), gypenoside S2 (3) and gypenoside S4 (4), respectively by HRESIMS and NMR spectra. Their cytotoxic activity was evaluated against three human cancer cell lines, A549 (lung), HepG2 (liver), SH-SY5Y (nerve), by MTT method. They showed low cytotoxicities with the IC50 values of more than 100 μM on three cancer cell lines. However, they appeared protective effects against hydrogen peroxide induced SH-SY5Y cell death in a dose-dependent manner. They recovered cell viability more than 69% at the concentration of 20 μM from 66%, while as vitamin C to 67%. Compound 3 and 4 recovered more than 79% at 100 μM. The present study suggests that G. pentaphyllum has antioxidative potential and the saponins from G. pentaphyllum are considered as the active compounds with safe and neuroprotecitve effect.
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Affiliation(s)
- Xin-Fang Zhai
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, PR China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Ma-Li Zu
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, PR China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Yu-Rong Wang
- School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Wei-Ye Cui
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, PR China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Yu Duan
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, PR China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Ce Yang
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, PR China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Xiang-Lan Piao
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, PR China; School of Pharmacy, Minzu University of China, Beijing 100081, China.
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Yang C, Zhao Y, Ren D, Yang X. Protective Effect of Saponins-Enriched Fraction of Gynostemma pentaphyllum against High Choline-Induced Vascular Endothelial Dysfunction and Hepatic Damage in Mice. Biol Pharm Bull 2020; 43:463-473. [PMID: 32115504 DOI: 10.1248/bpb.b19-00805] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Choline as a quaternary amine nutrient is metabolized to trimethylamine by gut microbiota and subsequently oxidized to circulating trimethylamine-N-oxide (TMAO), a gut-derived metabolite associated with liver toxicity and cardiovascular disease. The study was to probe the possible vasoprotective and hepatoprotective effects of total saponins of Gynostemma pentaphyllum (TSGP) in 3% high-choline water-feeding mice. The purified TSGP was obtained with content of 83.0% saponins, and its antioxidant activities were evaluated in vitro. Furthermore, the mice fed with high choline for 8 weeks significantly expressed vascular endothelial dysfunction and liver oxidative stress (p < 0.01 vs. Normal). Administration of TSGP at 400 and 800 mg/kg·body weight (b.w.) significantly lowered the serum total cholesterol (TC), triglyceride (TG), low density lipoprotein-cholesterol (LDL-C), endothelin-1 (ET-1) and thromboxane A2 (TXA2) levels, as well as hepatic malondialdehyde (MDA) formation, but effectively elevated the serum nitric oxide (NO), endothelial nitric oxide synthase (eNOS) and prostaglandin I2 (PGI2) levels, as well as alanine aminotransferase (ALT), aspartate aminotransferase (AST), T-superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities in high choline-fed mice. Hematoxylin-eosin (H&E) and oil red O staining also suggested that TSGP could exert the significant protection against endothelial dysfunction and liver injury in high choline-treated mice. These findings suggest that TSGP is of the saponins-enriched extract, and is a good candidate of dietary supplement and therapeutic application in vascular and hepatic oxidative injury.
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Affiliation(s)
- Chengcheng Yang
- Key Laboratory of Ministry of Education for Medicinal Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University
| | - Yan Zhao
- Key Laboratory of Ministry of Education for Medicinal Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University
| | - Daoyuan Ren
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Key Laboratory of Ministry of Education for Medicinal Resource and Natural Pharmaceutical Chemistry, College of Food Engineering and Nutritional Science, Shaanxi Normal University
| | - Xingbin Yang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Key Laboratory of Ministry of Education for Medicinal Resource and Natural Pharmaceutical Chemistry, College of Food Engineering and Nutritional Science, Shaanxi Normal University
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Zhang X, Shi G, Liu M, Chen R, Wu X, Zhao Y. Four new dammarane-type triterpenes derivatives from hydrolyzate of total Gynostemma pentaphyllum saponins and their bioactivities. Nat Prod Res 2019; 33:1605-1611. [PMID: 29359589 DOI: 10.1080/14786419.2018.1428592] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 01/10/2018] [Indexed: 10/18/2022]
Abstract
Phytochemical investigation of hydrolysate of total G. pentaphyllum saponins led to the isolation of four novel triterpenes, Gypensapogenin U (1), Gypensapogenin V (2), Gypensapogenin W (3) and Gypensapogenin X (4). The structures of these compounds were identified by 1D, 2D-NMR and HR-ESI-MS evidences. Additionally, the protective activity of these new compounds against cardiomyocytes injury induced by H2O2 and their cytotoxic activity against t-HSC/Cl-6 cells were evaluated.
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Affiliation(s)
- Xiaoshu Zhang
- a School of Functional Food and Wine , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
- b Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
| | - Guohui Shi
- a School of Functional Food and Wine , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
- b Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
| | - Mingbing Liu
- a School of Functional Food and Wine , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
- b Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
| | - Rong Chen
- a School of Functional Food and Wine , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
- b Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
| | - Xiaojun Wu
- c School of Pharmacy , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
| | - Yuqing Zhao
- a School of Functional Food and Wine , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
- b Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education , Shenyang Pharmaceutical University , Shenyang , People's Republic of China
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6
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Turley AE, Zagorski JW, Kennedy RC, Freeborn RA, Bursley JK, Edwards JR, Rockwell CE. Chronic low-level cadmium exposure in rats affects cytokine production by activated T cells. Toxicol Res (Camb) 2019; 8:227-237. [PMID: 30997022 PMCID: PMC6425995 DOI: 10.1039/c8tx00194d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 11/15/2018] [Indexed: 12/11/2022] Open
Abstract
Cadmium is a toxic metal and common environmental contaminant. Chronic cadmium exposure results in kidney, bone, reproductive, and immune toxicity as well as cancer. Cadmium induces splenomegaly and affects the adaptive immune system, but specific effects vary depending on the dose, model, and endpoint. This study investigates the effects of subchronic, oral, and low-dose cadmium exposure (32 ppm cadmium chloride in drinking water for 10 weeks) on the rat immune system, focusing on T cell function. Cadmium-exposed animals demonstrated slight increases in the spleen-to-body weight ratios, and decreases in overall splenic cell numbers and markers of oxidative stress. The relative ratios of splenic cell populations remained similar, except for modest increases in regulatory T cells in the cadmium-exposed animals. Cadmium exposure also significantly increased the production of IFNγ, a pro-inflammatory cytokine, and IL-10, a cytokine produced by multiple T cell subsets that typically inhibits IFNγ expression, by activated T cells. The increase in IFNγ and IL-10 suggests that cadmium exposure may affect multiple T cell subsets. Collectively, this study suggests that subchronic, low-dose cadmium exposure impacts both immune cell function and cellularity, and may enhance inflammatory responses.
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Affiliation(s)
- Alexandra E Turley
- Department of Pharmacology & Toxicology , Michigan State University , East Lansing , MI 48824 , USA . ; Tel: +517-884-6692
- Institute for Integrative Toxicology , Michigan State University , East Lansing , MI 48824 , USA
| | - Joseph W Zagorski
- Department of Pharmacology & Toxicology , Michigan State University , East Lansing , MI 48824 , USA . ; Tel: +517-884-6692
- Institute for Integrative Toxicology , Michigan State University , East Lansing , MI 48824 , USA
- Cell and Molecular Biology Program , Michigan State University , East Lansing , MI 48824 , USA
| | - Rebekah C Kennedy
- Department of Pharmacology & Toxicology , Michigan State University , East Lansing , MI 48824 , USA . ; Tel: +517-884-6692
| | - Robert A Freeborn
- Department of Pharmacology & Toxicology , Michigan State University , East Lansing , MI 48824 , USA . ; Tel: +517-884-6692
- Institute for Integrative Toxicology , Michigan State University , East Lansing , MI 48824 , USA
| | - Jenna K Bursley
- Department of Pharmacology & Toxicology , Michigan State University , East Lansing , MI 48824 , USA . ; Tel: +517-884-6692
| | - Joshua R Edwards
- Department of Pharmacology , College of Graduate Studies , Midwestern University , Downers Grove , IL 60515 , USA
| | - Cheryl E Rockwell
- Department of Pharmacology & Toxicology , Michigan State University , East Lansing , MI 48824 , USA . ; Tel: +517-884-6692
- Institute for Integrative Toxicology , Michigan State University , East Lansing , MI 48824 , USA
- Cell and Molecular Biology Program , Michigan State University , East Lansing , MI 48824 , USA
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Suntararuks S, Worasuttayangkurn L, Akanimanee J, Suriyo T, Nookabkaew S, Srisamut N, Visitnonthachai D, Watcharasit P, Satayavivad J. Sodium arsenite exposure impairs B cell proliferation and enhances vascular inflammation in Plasmodium berghei mouse model. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2019; 66:7-13. [PMID: 30593951 DOI: 10.1016/j.etap.2018.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 11/21/2018] [Accepted: 12/14/2018] [Indexed: 06/09/2023]
Abstract
Arsenic exposure has been linked to an impaired immune response and inflammation. Our study investigated the effects of sodium arsenite on host immune response and vascular inflammation during malarial infection. Mice were divided into three groups: control (C), Plasmodium berghei infection (I) and sodium arsenite exposure with Plasmodium berghei infection (As-I). The results showed that splenocyte proliferation stimulated by lipopolysaccharide (LPS) and pokeweed mitogen (PWM) was suppressed in the I group, and the suppression was more pronounced in the As-I group, suggesting that acquired immunity in infected mice was worsening following arsenic exposure. ICAM-1, an adhesion protein involved in parasite-infected red blood cell (iRBC) binding to endothelium, and HIF-1α, a hypoxia marker protein in the descending aorta, were increased in the As-I group compared to the I group. Collectively, our results suggest that arsenic may increase host susceptibility to malaria through suppression of B cell proliferation and enhancement of adhesion between iRBC and endothelium by increasing ICAM-1.
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Affiliation(s)
- Sumitra Suntararuks
- Laboratory of Pharmacology, Chulabhorn Research Institute, Bangkok 10210, Thailand
| | | | - Jaratluck Akanimanee
- Laboratory of Pharmacology, Chulabhorn Research Institute, Bangkok 10210, Thailand
| | - Tawit Suriyo
- Laboratory of Pharmacology, Chulabhorn Research Institute, Bangkok 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), Office of Higher Education Commission, Ministry of Education, Bangkok 10400, Thailand
| | - Sumontha Nookabkaew
- Laboratory of Pharmacology, Chulabhorn Research Institute, Bangkok 10210, Thailand
| | - Nujorn Srisamut
- Laboratory of Pharmacology, Chulabhorn Research Institute, Bangkok 10210, Thailand
| | | | - Piyajit Watcharasit
- Laboratory of Pharmacology, Chulabhorn Research Institute, Bangkok 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), Office of Higher Education Commission, Ministry of Education, Bangkok 10400, Thailand
| | - Jutamaad Satayavivad
- Laboratory of Pharmacology, Chulabhorn Research Institute, Bangkok 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), Office of Higher Education Commission, Ministry of Education, Bangkok 10400, Thailand.
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Shi L, Tan DH, Yan TC, Jiang DH, Hou MX. Cytotoxic triterpenes from the acid hydrolyzate of Gynostemma pentaphyllum saponins. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2018; 20:182-187. [PMID: 28463530 DOI: 10.1080/10286020.2017.1322070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
One new dammarane-type triterpene, gypsapogenin A (1), was isolated from the acid hydrolyzate of total saponins from Gynostemma pentaphyllum (Thunb.) Makino, together with two known compounds, (20S,24S)-3β,20,21β,23β,25-pentahydroxy-21,24-cyclodammarane (2) and (23S)-3β-hydroxydammar-20,24-dien-21-oic acid 21,23-lactone (3). Its structural elucidations were accomplished mainly on the basis of the interpretation of spectroscopic data, such as IR, HR-TOF-MS, and NMR. The cytotoxic activities were evaluated against HepG2 and A549 human cancer cell lines.
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Affiliation(s)
- Lin Shi
- a College of Food Science, Shenyang Agricultural University , Shenyang 110866 , China
- b Laboratory of Rescue Center of Severe Wound and Trauma PLA, Department of Emergency Medicine , General Hospital of Shenyang Military Command , Shenyang 110016 , China
| | - De-Hong Tan
- a College of Food Science, Shenyang Agricultural University , Shenyang 110866 , China
| | - Ting-Cai Yan
- a College of Food Science, Shenyang Agricultural University , Shenyang 110866 , China
| | - Dong-Hua Jiang
- a College of Food Science, Shenyang Agricultural University , Shenyang 110866 , China
| | - Ming-Xiao Hou
- b Laboratory of Rescue Center of Severe Wound and Trauma PLA, Department of Emergency Medicine , General Hospital of Shenyang Military Command , Shenyang 110016 , China
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9
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Zhang X, Shi G, Sun Y, Wu X, Zhao Y. Triterpenes derived from hydrolyzate of total Gynostemma pentaphyllum saponins with anti-hepatic fibrosis and protective activity against H 2O 2-induced injury. PHYTOCHEMISTRY 2017; 144:226-232. [PMID: 28985570 DOI: 10.1016/j.phytochem.2017.09.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 08/18/2017] [Accepted: 09/26/2017] [Indexed: 06/07/2023]
Abstract
Gynostemma pentaphyllum is a popular functional food, and it is also used as a traditional medicine in Asia. In this study, five previously undescribed triterpenes, gypensapogenin M, gypensapogenin N, gypensapogenin O, gypensapogenin P, and gypensapogenin Q, together with five known compounds were isolated from the hydrolyzate of total G. pentaphyllum saponins. The bioassay data showed that all the triterpenes exhibited significant protective activity against H2O2-induced myocardial cell injury and anti-hepatic fibrosis activity. Taken together, the discovery of these triterpenes from the hydrolyzate of total G. pentaphyllum saponins expands its use as a functional food for preventing myocardial injury and liver fibrosis.
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Affiliation(s)
- Xiaoshu Zhang
- Department of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Guohui Shi
- Department of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Yuanyuan Sun
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; School of Life Science, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Xiaojun Wu
- Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Yuqing Zhao
- Department of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
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Wang J, Yang JL, Zhou PP, Meng XH, Shi YP. Further New Gypenosides from Jiaogulan (Gynostemma pentaphyllum). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:5926-5934. [PMID: 28662582 DOI: 10.1021/acs.jafc.7b01477] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Jiaogulan (Gynostemma pentaphyllum) has been widely used as a herbal tea, dietary supplement, and vegetable in Asian countries. In this study, six new gypenosides (1-6) were isolated from the aerial parts of G. pentaphyllum. Their molecular structures were elucidated through spectroscopic analysis and acid hydrolysis. Gypenosides 1 and 2 represented the first example of a dammar-21-O- glucopyranoside without any unsaturated functional group and a dammar-3-O-glucopyranosyl-25-O-glucopyranoside without any cyclization in the side chain, respectively. In addition, gypenosides 5 and 6 exhibited the first example of a 24-hydroperoxy-19-oxo-dammarane triterpenoid and 19-oxo-dammar-21-O-glucopyranoside with a saturated side chain, respectively. Gypenoside 5 was found to possess protein tyrosine phosphatase 1B inhibitory activity, with an IC50 value of 8.2 ± 0.9 μM, and moderate cytotoxicity against human breast cancer cells MCF7, MCF7/ADR, and MDA-MB-231, with IC50 values ranging from 10.5 ± 1.4 to 14.2 ± 2.6 μM. The outcome of the study provided crucial information regarding the structural diversity and health benefits of gypenosides.
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Affiliation(s)
- Jun Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Lanzhou 730000, People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100039, People's Republic of China
| | - Jun-Li Yang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Lanzhou 730000, People's Republic of China
| | - Pan-Pan Zhou
- College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, Gansu 730000, People's Republic of China
| | - Xian-Hua Meng
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Lanzhou 730000, People's Republic of China
| | - Yan-Ping Shi
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Lanzhou 730000, People's Republic of China
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Liao Y, Cao H, Xia B, Xiao Q, Liu P, Hu G, Zhang C. Changes in Trace Element Contents and Morphology in Bones of Duck Exposed to Molybdenum or/and Cadmium. Biol Trace Elem Res 2017; 175:449-457. [PMID: 27392954 DOI: 10.1007/s12011-016-0778-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 06/09/2016] [Indexed: 01/15/2023]
Abstract
Cadmium (Cd) and high molybdenum (Mo) can lead to adverse reactions on animals, but the coinduced toxicity of Mo and Cd to bone in ducks was not well understood. The objective of this study was to investigate the changes in trace elements' contents and morphology in bones of duck exposed to Mo or/and Cd. One hundred twenty healthy 11-day-old male ducks were randomly divided into six groups and treated with commercial diet containing Cd or/and Mo. On the 60th and 120th days, the blood, excretion, and metatarsals were collected to determine alkaline phosphatase (ALP) activity and the contents of Mo, Cd, calcium (Ca), phosphorus (P), copper (Cu), iron (Fe), zine (Zn), and selenium (Se). In addition, metatarsals were subjected to histopathological analysis with the optical microscope and radiography. The results indicated that Mo and Cd contents significantly increased while Ca, P, Cu, and Se contents remarkably decreased in metatarsals in coexposure groups (P < 0.01). Contents of Fe and Zn in metatarsals had no significant difference among groups (P > 0.05). Ca content in serum had no significant difference among experimental groups (P > 0.05), but P content was significantly decreased in HMo and HMo + Cd groups (P < 0.05). Contents of Ca and P in excretion and ALP activity were significantly increased in coinduced groups (P < 0.05). Furthermore, osteoporotic lesions, less and thinner trabecular bone were observed in combination groups. The findings suggested that dietary of Cd or/and Mo could lead to bone damages in ducks via disturbing the balance of Ca and P in body and homeostasis of Cu, Fe, Zn, and Se in bones; moreover, the two elements showed a possible synergistic relationship.
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Affiliation(s)
- Yilin Liao
- College of Animal Husbandry and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi Province, People's Republic of China
| | - Huabin Cao
- College of Animal Husbandry and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi Province, People's Republic of China
| | - Bing Xia
- College of Animal Husbandry and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi Province, People's Republic of China
| | - Qingyang Xiao
- College of Animal Husbandry and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi Province, People's Republic of China
| | - Ping Liu
- College of Animal Husbandry and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi Province, People's Republic of China
| | - Guoliang Hu
- College of Animal Husbandry and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi Province, People's Republic of China.
| | - Caiying Zhang
- College of Animal Husbandry and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi Province, People's Republic of China.
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Jang H, Lee JW, Lee C, Jin Q, Lee MK, Lee CK, Lee MK, Hwang BY. Flavonol glycosides from the aerial parts of Gynostemma pentaphyllum and their antioxidant activity. Arch Pharm Res 2016; 39:1232-6. [DOI: 10.1007/s12272-016-0793-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 07/04/2016] [Indexed: 11/30/2022]
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13
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Li Y, Zhou Y, Wang X, Wang P, Xiao Y, Cheng X, Zhang Y, Liu Y, Liu Q. Fruit Extract from Pyropolyporus fomentarius (L. ex Fr.) Teng Induces Mitochondria-Dependent Apoptosis in Leukemia Cells but Enhances Immunomodulatory Activities of Splenic Lymphocytes. Nutr Cancer 2016; 68:708-17. [PMID: 27115601 DOI: 10.1080/01635581.2016.1158290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Pyropolyporus fomentarius (L. ex Fr.) Teng is a unique woody mushroom due to its medicinal value with numerous pharmacological activities. This study presented the potential antitumor and immunomodulatory properties of ethanol extract of P. fomentarius. The results showed that P. fomentarius extract inhibited the viability of murine leukemia L1210 cells in a dose-dependent manner with IC50 value of 69.35 μg/ml. Flow cytometry analysis demonstrated that the extract induced apoptosis in L1210 cells. Additionally, the decline of mitochondrial membrane potential was observed as well as the changes of caspase-3, caspase-9, Bcl-2, and Bax, suggesting that proapoptosis effect of the extract involved mitochondria-related pathway. Simultaneously, the P. fomentarius extract significantly enhanced the proliferation and activation of splenic lymphocytes in a dose-dependent manner. This P. fomentarius extract has potential applications as a natural antitumor agent with immunomodulatory activity.
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Affiliation(s)
- Yixiang Li
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Yuetao Zhou
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Xiaobing Wang
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Pan Wang
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Yaping Xiao
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Xiaoxia Cheng
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Yanhua Zhang
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Yilin Liu
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
| | - Quanhong Liu
- a Key Laboratory of the Ministry of Education for Medicinal Mushroom Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University , Xi'an , China
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Cao H, Zhang M, Xia B, Xiong J, Zong Y, Hu G, Zhang C. Effects of Molybdenum or/and Cadmium on mRNA Expression Levels of Inflammatory Cytokines and HSPs in Duck Spleens. Biol Trace Elem Res 2016. [PMID: 26201682 DOI: 10.1007/s12011-015-0442-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cadmium (Cd) and high dietary intake of molybdenum (Mo) can cause multiple-organ injury in animals, but the co-induced toxicity of Mo and Cd to spleen in ducks is not well understood. The aim of this study was to investigate the co-induced effects of Mo and Cd on the mRNA expression levels of inflammatory cytokines and heat shock proteins (HSPs) in duck spleens. Two hundred forty healthy 11-day-old ducks were randomly divided into six groups and treated with a commercial diet containing Mo or/and Cd. After being treated with Mo or/and Cd for 30, 60, 90, and 120 days, the mRNA expression levels of nuclear factor-kappa B (NF-κB), tumor necrosis factor-α (TNF-α), cyclooxygenase-2 (COX-2), HSP60, HSP70, and HSP90 were examined in duck spleens. Histopathology was examined in duck spleens at 120 days. The results indicated that the mRNA expression levels of HSPs were significantly upregulated in the co-induced groups (P < 0.01), while these decreased in the high dietary intake of Mo combined with Cd group at 120 days. Exposure to Mo or/and Cd upregulated the mRNA expression levels of NF-κB, COX-2, and TNF-α in the combination groups (P < 0.01). Furthermore, severe congestion, bleeding, splenic corpuscle structure fuzzy, wall thickness of sheath artery thickening, and oxyhematin were observed in the spleens of combination groups. Meanwhile, the organizational structure damage of the combined groups was more severe than that of the other groups. These results suggested that exposure to Mo or/and Cd might lead to tissue damage, and high expression of HSPs and inflammatory cytokines may play a role in the resistance of spleen toxicity induced by Mo or/and Cd. Interaction of Mo and Cd may have a synergistic effect on spleen toxicity.
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Affiliation(s)
- Huabin Cao
- Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, People's Republic of China
| | - Mengmeng Zhang
- Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, People's Republic of China
| | - Bing Xia
- Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, People's Republic of China
| | - Jin Xiong
- Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, People's Republic of China
| | - Yibo Zong
- Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, People's Republic of China
| | - Guoliang Hu
- Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, People's Republic of China.
| | - Caiying Zhang
- Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, People's Republic of China.
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Yang Y, Xu S, Xu Q, Liu X, Gao Y, Steinmetz A, Wang N, Wang T, Qiu G. Protective effect of dammarane sapogenins against chemotherapy-induced myelosuppression in mice. Exp Biol Med (Maywood) 2011; 236:729-35. [PMID: 21652604 DOI: 10.1258/ebm.2011.010369] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Chemotherapy is the most common way to treat malignancies, but myelosuppression, one of its common side-effects, is a formidable problem. The present study described the protective role of dammarane sapogenins (DS), an active fraction from oriental ginseng, on myelosuppression induced by cyclophosphamide (CP) in mice. DS was orally administered at different dosages (37.5, 75, and 150 mg/kg) for 10 d after CP administration (200 mg/kg intraperitoneally). The results showed that DS increased the number of white blood cells (WBC) on day 3 and day 7 (P < 0.05), such that WBC levels were increased by 105.7 ± 29.5% at 75 mg/kg of DS on day 3 (P < 0.05, compared with the CP group). Similar results were observed in red blood cells and platelets in DS-treated groups. The colony-forming assay demonstrated that the depressed numbers of CFU-GM (colony-forming unit-granulocyte and macrophage), CFU-E (colony-forming unit-erythroid), BFU-E (burst-forming unit-erythroid), CFU-Meg (colony-forming unit-megakaryocyte) and CFU-GEMM (colony-forming unit-granulocyte, -erythrocyte, -monocyte and -megakaryocyte) induced by CP were significantly reversed after DS treatment. Moreover, the ameliorative effect of DS on myelosuppression was also observed in the femur by hematoxylin/eosin staining. In DS-treated groups, ConA-induced splenocyte proliferation was enhanced significantly at all the doses (37.5, 75, 150 mg/kg) on day 3 at the rate of 50.3 ± 8.0%, 77.6 ± 8.5% and 44.5 ± 8.4%, respectively, while lipopolysaccharide-induced proliferation was increased mainly on day 7 (P < 0.01), with an increased rate of 39.8 ± 5.6%, 34.9 ± 6.6% and 38.3 ± 7.3%, respectively. The thymus index was also markedly increased by 70.4% and 36.6% at 75 mg/kg on days 3 and 7, respectively, as compared with the CP group. In summary, DS has a protective function against CP-induced myelosuppression. Its mechanism might be related to stimulating hematopoiesis recovery, as well as enhancing the immunological function.
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Affiliation(s)
- Yanyan Yang
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant, Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Effects of different doses and schedules of diazepam treatment on lymphocyte parameters in rats. Int Immunopharmacol 2010; 10:1335-43. [PMID: 20846531 DOI: 10.1016/j.intimp.2010.08.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Revised: 07/30/2010] [Accepted: 08/20/2010] [Indexed: 11/20/2022]
Abstract
Benzodiazepines (BZD) are widely used for the treatment of anxiety. They enhance GABA-ergic neurotransmission through the binding on specific BDZ recognition sites, within the GABA(A) receptor-ion channel complex. However, recent studies showed that BZD also act on peripheral benzodiazepine receptor sites (PBR) or translocator protein 18 kDa (TSPO). Evidence for a direct immunomodulatory action for BZD emerged from studies that demonstrated the presence of TSPO on immune/inflammatory cells. The present study was designed to analyze the effects of diazepam on rat lymphocyte parameters, specifically on phenotype, cell proliferation and cell death. The effects of both acute and long-term (21 days) diazepam (1 and 10 mg/kg/day) administrations were evaluated. Results showed that diazepam (1 mg/kg) treatment did not change the immune parameters analyzed. However, both diazepam (10 mg/kg) acute and long-term treatments decreased the number of apoptotic cells; they also increased the percentage of T cytotoxic cells; decreased the percentage of B cells and increased the corticosterone serum levels. The induction of functional tolerance was suggested for the highest dose of diazepam (10 mg/kg), but not for the smaller dose (1 mg/kg) used, at least for diazepam effects on corticosterone serum levels. Diazepam effects were discussed as being related to the number of TSPO sites present on immune cells and/or to the increased levels of serum corticosterone observed after the treatments used.
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