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Tyler SEB, Tyler LDK. Therapeutic roles of plants for 15 hypothesised causal bases of Alzheimer's disease. NATURAL PRODUCTS AND BIOPROSPECTING 2022; 12:34. [PMID: 35996065 PMCID: PMC9395556 DOI: 10.1007/s13659-022-00354-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 06/15/2022] [Indexed: 05/26/2023]
Abstract
Alzheimer's disease (AD) is progressive and ultimately fatal, with current drugs failing to reverse and cure it. This study aimed to find plant species which may provide therapeutic bioactivities targeted to causal agents proposed to be driving AD. A novel toolkit methodology was employed, whereby clinical symptoms were translated into categories recognized in ethnomedicine. These categories were applied to find plant species with therapeutic effects, mined from ethnomedical surveys. Survey locations were mapped to assess how this data is at risk. Bioactivities were found of therapeutic relevance to 15 hypothesised causal bases for AD. 107 species with an ethnological report of memory improvement demonstrated therapeutic activity for all these 15 causal bases. The majority of the surveys were found to reside within biodiversity hotspots (centres of high biodiversity under threat), with loss of traditional knowledge the most common threat. Our findings suggest that the documented plants provide a large resource of AD therapeutic potential. In demonstrating bioactivities targeted to these causal bases, such plants may have the capacity to reduce or reverse AD, with promise as drug leads to target multiple AD hallmarks. However, there is a need to preserve ethnomedical knowledge, and the habitats on which this knowledge depends.
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Affiliation(s)
| | - Luke D K Tyler
- School of Natural Sciences, Bangor University, Gwynedd, UK
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2
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Phytomedicinal therapeutics for male infertility: critical insights and scientific updates. J Nat Med 2022; 76:546-573. [PMID: 35377028 DOI: 10.1007/s11418-022-01619-0] [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] [Received: 08/12/2021] [Accepted: 03/11/2022] [Indexed: 10/18/2022]
Abstract
Infertility is a significant cause of anxiety, depression, and social stigma among couples and families. In such cases, male reproductive factors contribute widely to the extent of 20-70%. Male infertility is a multifactorial disease with several complications contributing to its diagnosis. Although its management encompasses both modern and traditional medicine arenas, the first line of treatment, adopted by most males, focuses on the reasonably successful medicinal plant-based conventional therapies. Phyto-therapeutics, which relies on active ingredients from traditionally known herbs, influences sexual behavior and male fertility factors. The potency of these phyto-actives depends on their preparation methods and forms of consumption, including decoctions, extracts, semi-purified compounds, etc., as inferred from in vitro and in vivo (laboratory animal models and human) studies. The mechanisms of action therein involve the testosterone pathway for stimulation of spermatogenesis, reduction of oxidative stress, inhibition of inflammation, activation of signaling pathways in the testes [extracellular-regulated kinase (ERK)/protein kinase B(PKB)/transformation of growth factor-beta 1(TGF-β1)/nuclear factor kappa-light-chain-enhancer of activated B cells NF-kB signaling pathways] and mediation of sexual behavior. This review critically focuses on the medicinal plants and their potent actives, along with the biochemical and molecular mechanisms that modulate vital pathways associated with the successful management of male infertility. Such intrinsic knowledge will significantly further studies on medicinal plants that improve male reproductive health.
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Zhou Y, Ren HC, Zhang QY, Liang H, Tu PF. Three new p-coumaroylated sesquiterpenoids from Pilea cavaleriei. Nat Prod Res 2022; 36:2239-2245. [DOI: 10.1080/14786419.2020.1826481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yong Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, PR China
- Beijing Pharmaceutical Group University of Staff and Workers, Beijing, PR China
| | - Heng-Chun Ren
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, PR China
| | - Qing-Ying Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, PR China
| | - Hong Liang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, PR China
| | - Peng-Fei Tu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, PR China
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Singh S, Bawitlung L, Singh MK, Chauhan A, Padalia RC, Pal A, Verma RS. Chemical Composition of Essential Oil from Pilea microphylla and its Antimicrobial Activity. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03623-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shivappa P, Bernhardt G. Natural radioprotectors on current and future perspectives: A mini-review. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2022; 14:57-71. [PMID: 36034486 PMCID: PMC9416108 DOI: 10.4103/jpbs.jpbs_502_21] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 11/30/2021] [Accepted: 12/20/2021] [Indexed: 11/16/2022] Open
Abstract
Radiation therapy is used as the primary treatment for cancer. Eighty percent of cancer patients require radiation therapy during treatment or for medical purposes. During treatment, radiation causes various biological defects in the cells. The prevalence of cytotoxicity limits the dose used for effective treatment. This method is designed to strike a balance between removing cancer cells and protecting normal tissues. Unfortunately, effective radiation is unavailable once acute toxicity occurs during clinical radiation therapy. Therefore, a lot of research interest is needed in the discovery of radioprotective drugs to accelerate treatment to reduce this toxicity (i.e., normal tissue toxicity to cancer cell death). Radiation protectors may be chemicals or drugs that minimize the damage caused due to radiation therapy in living organisms. The determination of effective and nontoxic radiation protection is an essential goal for radiation oncologists and basic radiobiologists. However, despite the advantages, many radioprotectors were found to have disadvantages which include cost, less duration, toxicity, and effect on the central nervous system. Therefore in recent years, the focus has been diverted to finding out optimal natural products to act as radioprotectors. Natural radiation protectors are plant compounds that protect normal (noncancerous) cells from damage from radiation therapy. Natural herbal products are nontoxic with proven therapeutic benefits and have long been used to treat various diseases. In conclusion, we find that there are various radiation protectors with different purposes and mechanisms of action.
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Sinha P, Arunachalam KD, Nagarajan SK, Madhavan T, R Jayakumar A, Saiyad Musthafa M. Radio-protective efficacy of Gymnema sylvestre on Pangasius sutchi against gamma ( 60Co) irradiation. Int J Radiat Biol 2021; 98:212-229. [PMID: 34705596 DOI: 10.1080/09553002.2022.1998701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE Freshwater fish Pangasius sutchi was used in this study as a vertebrate model. We evaluated the induction of certain antioxidant enzymes in various vital organs. The radioprotective efficacy of Gymnema sylvestre leaves extract (GS) [25 mg/kg Body Weight (B.W)] and its bioactive compound Gymnemagenin (GG) [0.3 mg/kg B.W] was compared with Amifostine (Ami), the only radioprotector clinically approved by the US-FDA [Ami- 83.3 mg/kg B.W] against different doses of gamma radiation - 60Co (Lethal Dose: LD30-9.2 Gy, LD50-10.2 Gy and LD70-11.4 Gy). MATERIALS AND METHODS This study was done via stress marker enzymes, cell cycle analysis (CCA) and DNA damage assay prediction with molecular docking, which are reported here for the first time. The results indicate an elevated LPO level and decreased level of CAT, SOD and GSH due to oxidative stress initiation by 60Co Ionizing Radiation (IR) on 4th day and slightly reduced on 32nd day while the reverse observed when the fishes were pretreated with Ami, GS and GG. Similarly, CCA and dead/live cells counts were conducted with pretreatment of Ami, GS and GG against 60Co IR dose (LD50-10.2 Gy). RESULTS In CCA, G0/G1 phase was observed to be the highest in Ami and lowest in GG, against 60Co IR doses 10.2 Gy which was 51.76 ± 7.55. The dead cells range observed in pretreated group of Ami, GS and GG was lowest in Ami and highest in GG and live cells (highest in Ami and lowest in GG) as compared to 60Co IR group (86.43 ± 3.42 and 8.77 ± 5.95). Thus, antioxidant profile improvement by oxidative stress reduction and gradual progression of different phases of cell cycle except the apoptotic phase along with the live cells counts indicates that the radio-protective efficacy of GS is similar to Ami. CONCLUSION Predictive assessment was carried out by docking of Ami, various components of GS with p53, NF-κβ cells and Rad51 proteins structures responsible for CCA, apoptosis and repair mechanism. These structural proteins were docked with other structural proteins like USP7, TNF-α and partner and localizer of BRCA2 associated (PALB2/BRCA2) complex which made us perform these systemic efforts to find the functional activity of these known radio-protectants.
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Affiliation(s)
- Pamela Sinha
- Center for Environmental and Nuclear Research (CENR), SRM Institute of Science and Technology, Kattankulathur, India
| | - Kantha Devi Arunachalam
- Center for Environmental and Nuclear Research (CENR), SRM Institute of Science and Technology, Kattankulathur, India
| | | | - Thirumurthy Madhavan
- Department of Genetic Engineering, School of Bioengineering, SRMIST, Kattankulathur, India
| | - Arumugam R Jayakumar
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami Miller School of Medicine, Miami, FL, USA.,Neuropathology/Oncology Unit, Miami VA Foundation for Research and Education Inc, Miami, FL, USA
| | - Mohamed Saiyad Musthafa
- Unit of Research in Radiation Biology & Environmental Radioactivity (URRBER), P.G. & Research Department of Zoology, The New College (Autonomous), Affiliated to University of Madras, Chennai, India
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Ranjan R, Kalita B, Singh A, Yashavarddhan MH, Prakash H, Gupta ML. Prophylactic administration of podophyllotoxin and rutin combination assists the revival of radiation-induced hematopoietic suppression in lethally irradiated mice. Biochem Biophys Res Commun 2021; 549:214-220. [PMID: 33706191 DOI: 10.1016/j.bbrc.2021.02.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 11/27/2022]
Abstract
Hematopoietic syndrome contributes to mortality after exposure to high doses of low LET radiation. In this context, we have earlier demonstrated the potential of G-003 M (a combination of podophyllotoxin and rutin) in alleviating radiation-induced bone marrow suppression. Similarly, we here demonstrate that G-003 M protected mice from death (>83% protection) and increased the populations of CD 34 (Cluster of differentiation 34) as well as CD 117 (Cluster of differentiation 117) positive cell population and their colony forming capacity. This was accompanied with increase in the serum titre of granulocyte colony stimulating factor (G-CSF), granulocyte-macrophage colony stimulating factor (GM-CSF). Interestingly, G-003 M lowered down the titre of fms-like tyrosine kinase (Flt-3) ligands. Our results furthermore demonstrates that G-003 M facilitated the nuclear translocation of β-catenin and upregulated the expression of Wnt 10b. Conditioning of animal with G-003 M activated the expression of survivin, inhibited the activation of Caspase-3 in CD 34/117+ progenitor stem cells and protected the bone marrow vascularity and splenic colonies in lethally irradiated animals, which collectively promoted hemopoietic recovery in lethally irradiated mice.
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Affiliation(s)
- Rajiv Ranjan
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Marg, Delhi, 110054, India
| | - Bhargab Kalita
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Marg, Delhi, 110054, India
| | - Abhinav Singh
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Marg, Delhi, 110054, India
| | - M H Yashavarddhan
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Marg, Delhi, 110054, India
| | - Hridayesh Prakash
- Institute of Virology and Immunology, Amity University Campus, Sector -125, Noida, 201313, India
| | - Manju Lata Gupta
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Marg, Delhi, 110054, India.
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Li J, Tang J, Zeng S, Han F, Yuan J, Yu J. Comparative plastid genomics of four Pilea (Urticaceae) species: insight into interspecific plastid genome diversity in Pilea. BMC PLANT BIOLOGY 2021; 21:25. [PMID: 33413130 PMCID: PMC7792329 DOI: 10.1186/s12870-020-02793-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 12/09/2020] [Indexed: 05/24/2023]
Abstract
BACKGROUND Pilea is a genus of perennial herbs from the family Urticaceae, and some species are used as courtyard ornamentals or for medicinal purposes. At present, there is no information about the plastid genome of Pilea, which limits our understanding of this genus. Here, we report 4 plastid genomes of Pilea taxa (Pilea mollis, Pilea glauca 'Greizy', Pilea peperomioides and Pilea serpyllacea 'Globosa') and performed comprehensive comparative analysis. RESULTS The four plastid genomes all have a typical quartile structure. The lengths of the plastid genomes ranged from 150,398 bp to 152,327 bp, and each genome contained 113 unique genes, including 79 protein-coding genes, 4 rRNA genes, and 30 tRNA genes. Comparative analysis showed a rather high level of sequence divergence in the four genomes. Moreover, eight hypervariable regions were identified (petN-psbM, psbZ-trnG-GCC, trnT-UGU-trnL-UAA, accD-psbI, ndhF-rpl32, rpl32-trnL-UAG, ndhA-intron and ycf1), which are proposed for use as DNA barcode regions. Phylogenetic relationships based on the plastid genomes of 23 species of 14 genera of Urticaceae resulted in the placement of Pilea in the middle and lower part of the phylogenetic tree, with 100% bootstrap support within Urticaceae. CONCLUSION Our results enrich the resources concerning plastid genomes. Comparative plastome analysis provides insight into the interspecific diversity of the plastid genome of Pilea. The identified hypervariable regions could be used for developing molecular markers applicable in various research areas.
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Affiliation(s)
- Jingling Li
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400716, China
| | - Jianmin Tang
- College of Landscape Architecture and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Chongqing, 402160, China
| | - Siyuan Zeng
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400716, China
| | - Fang Han
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400716, China
| | - Jing Yuan
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400716, China
| | - Jie Yu
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400716, China.
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, Chongqing, 400716, China.
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Zhou Y, Li LY, Yin X, Zhang QY, Liang H, Tu PF. Sesquiterpenoids from Pilea cavaleriei. Nat Prod Res 2019; 35:1537-1543. [PMID: 33938337 DOI: 10.1080/14786419.2019.1660330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
One new cis p-coumaroyl copaborneol-type sesquiterpenoid (1), together with its known trans isomer (2) and six other known p-coumaroyl humulane-type sesquiterpenoids (3-8), were isolated from the whole plants of Pilea cavaleriei. Their structures were determined by spectroscopic data. Compounds 1-4 exhibited moderate antimycobacterial activity against Mycobacterium tuberculosis H37Rv.
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Affiliation(s)
- Yong Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China.,Beijing Pharmaceutical Group University of Staff and Workers, Beijing, China
| | - Ling-Yu Li
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Xu Yin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China
| | - Qing-Ying Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China
| | - Hong Liang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China
| | - Peng-Fei Tu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China
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Joshi C, Thimmaiah N, Patil R, Khandagale A, Somashekarappa HM, Ananda D, Manjunath HM. Mitigation of radiation-induced oxidative stress by methanolic extract of Tragia involucrata in swiss albino mice. Pharmacognosy Res 2019. [DOI: 10.4103/pr.pr_177_18] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Nimesh H, Tiwari V, Yang C, Gundala SR, Chuttani K, Hazari PP, Mishra AK, Sharma A, Lal J, Katyal A, Aneja R, Tandon V. Preclinical Evaluation of DMA, a Bisbenzimidazole, as Radioprotector: Toxicity, Pharmacokinetics, and Biodistribution Studies in Balb/c Mice. Mol Pharmacol 2015; 88:768-78. [DOI: 10.1124/mol.115.098376] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 07/29/2015] [Indexed: 11/22/2022] Open
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Sharma P, Parmar J, Verma P, Goyal P. Radiation induced oxidative stress and its toxicity in testes of mice and their prevention by Tinospora cordifolia extract. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.jrhm.2015.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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13
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Antioxidant activity and phenolic profile of various morphological parts of underutilised Baccaurea angulata fruit. Food Chem 2015; 172:778-87. [DOI: 10.1016/j.foodchem.2014.09.122] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 09/06/2014] [Accepted: 09/20/2014] [Indexed: 01/06/2023]
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Zhou Y, Ren HC, Qin RD, Zhang QY, Liang H. New phenolic glycosides from Pilea cavaleriei. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2014; 16:565-573. [PMID: 24911100 DOI: 10.1080/10286020.2014.922552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 05/06/2014] [Indexed: 06/03/2023]
Abstract
Five new phenolic glycosides, 2-hydroxy-(2'E)-prenyl benzoate-2,4'-di-O-β-D-glucopyranoside (1), 2-hydroxy-(2'E)-prenyl benzoate-2-O-α-L-arabinopyranosyl-(1 → 6)-β-D-glucopyranoside (2), 4-methylphenol-1-O-α-L-rhamnopyranosyl-(1 → 6)-β-D-glucopyranoside (3), 4-methylphenol-1-O-α-L-arabinopyranosyl-(1 → 6)-β-D-glucopyranoside (4), and 3,5-dimethoxyphenol-1-O-β-D-apiofuranosyl-(1 → 2)-β-D-glucopyranoside (5), together with six known glycosides (6-11), were isolated from the n-BuOH fraction of the EtOH extract of Pilea cavaleriei Levl subsp. cavaleriei. Their structures were elucidated by extensive spectroscopic analysis, including 1D and 2D NMR spectroscopy as well as HR-ESI-MS, and chemical evidences. All these compounds were isolated from the genus Pilea for the first time.
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Affiliation(s)
- Yong Zhou
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
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Srinivasan M, Kalpana KB, Devipriya N, Menon VP. Protective effect of lycopene on whole body irradiation induced liver damage of Swiss albino mice: Pathological evaluation. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.bionut.2013.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kalpana KB, Vishwanathan P, Thayalan K, Menon VP. Protective effect of dendrodoine analog, an aminothiazole derivative against X-radiation induced hepatocellular damage in mice. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 34:832-840. [PMID: 23127424 DOI: 10.1016/j.etap.2012.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 07/31/2012] [Accepted: 09/04/2012] [Indexed: 06/01/2023]
Abstract
This study evaluated the radioprotective effect of dendrodoine analog (DA) against radiation-induced damage in the liver of mice. The study was divided into two phases; in the first phase, the effective concentration of DA was fixed by performing a survival study. In the second phase, the fixed effective concentration of DA was orally administered to mice to evaluate its radioprotective efficacy by performing various assays. The results indicated that the radiation-induced decrease in the activities of antioxidant enzymes, increase in thiobarbituric acid reactive substances (TBARS) and comet parameters were altered by pre-administration with the effective concentration of DA which restored the antioxidant status to near normal and decreased the level of the TBARS and comet parameters. The histopathological examinations further confirmed the hepatoprotective effect of DA in mice. Thus, the current study showed DA to be an effective radioprotector against radiation induced damage in the liver of mice.
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Affiliation(s)
- K B Kalpana
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India
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Bansal P, Paul P, Kunwar A, Jayakumar S, Nayak PG, Priyadarsini K, Unnikrishnan M. Radioprotection by quercetin-3-O-rutinoside, a flavonoid glycoside – A cellular and mechanistic approach. J Funct Foods 2012. [DOI: 10.1016/j.jff.2012.06.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Bansal P, Paul P, Mudgal J, G. Nayak P, Thomas Pannakal S, Priyadarsini K, Unnikrishnan M. Antidiabetic, antihyperlipidemic and antioxidant effects of the flavonoid rich fraction of Pilea microphylla (L.) in high fat diet/streptozotocin-induced diabetes in mice. ACTA ACUST UNITED AC 2012; 64:651-8. [DOI: 10.1016/j.etp.2010.12.009] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 11/25/2010] [Accepted: 12/09/2010] [Indexed: 01/06/2023]
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Paul P, Bansal P, Nayak PG, Pannakal ST, Priyadarsini KI, Unnikrishnan MK. Polyphenolic fraction of Pilea microphylla (L.) protects Chinese hamster lung fibroblasts against γ-radiation-induced cytotoxicity and genotoxicity. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 33:107-119. [PMID: 22196050 DOI: 10.1016/j.etap.2011.09.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 09/15/2011] [Accepted: 09/16/2011] [Indexed: 05/31/2023]
Abstract
Present study was designed to compare cytoprotective and antigenotoxic activity of the polyphenolic fraction of Pilea microphylla (PM1) with that of its active polyphenolic constituents against γ-radiation in V79 cells. PM1 was standardized with respect to the polyphenols present by RP-HPLC. It was evaluated for its free radical scavenging potential using Fenton reaction-induced DNA damage and lipid peroxidation. Further, PM1 was subjected against γ-radiation-induced cytotoxicity and genotoxicity in V79 cells. PM1 significantly reduced free radical-mediated calf thymus DNA damage and lipid peroxidation. Among the concentrations tested (12.5, 25 and 50 μg/ml) for radioprotection, PM1 at 25 μg/ml exhibited maximum protection. Further, when compared with constituent polyphenols viz., rutin, quercetin and chlorogenic acid (concentrations equivalent to that present in PM1-25 μg/ml), a combination of polyphenols was found most effective in preventing γ-radiation-induced cytotoxicity and genotoxicity. To conclude, radioprotection is possibly a synergistic effect of the phytochemicals present in the herbal extract, rather than any single component.
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Affiliation(s)
- Piya Paul
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal 576104, Karnataka, India
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Phenolic compounds isolated from Pilea microphylla prevent radiation-induced cellular DNA damage. Acta Pharm Sin B 2011. [DOI: 10.1016/j.apsb.2011.10.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Yang R, Wang J, Liu Z, Pei X, Han X, Li Y. Antioxidant effect of a marine oligopeptide preparation from chum salmon (Oncorhynchus keta) by enzymatic hydrolysis in radiation injured mice. Mar Drugs 2011; 9:2304-2315. [PMID: 22163188 PMCID: PMC3229237 DOI: 10.3390/md9112304] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 11/02/2011] [Accepted: 11/03/2011] [Indexed: 11/16/2022] Open
Abstract
Marine oligopeptide preparation (MOP) obtained from Chum Salmon (Oncorhynchus keta) by the method of enzymatic hydrolysis, has been found to possess a radioprotective property through stimulation of the radiation-induced immunosuppression. The current study aimed to further investigate the free radicals scavenging and antioxidant effects of MOP in radiation injured mice. Female ICR mice (6-8 weeks old) were randomly divided into 5 groups, i.e., blank control, irradiation control and MOP (0.225, 0.450 and 1.350 g/kg body weight) plus an irradiation-treated group. The result revealed that MOP significantly increased the white blood cell counts after irradiation, and lessened the radiation-induced oxidative damage. These effects may be caused by augmentation of the activities of antioxidant enzymes, such as SOD and GSH-Px, reduction of the lipid peroxidation (MDA level) in liver, and protection against radiation-induced apoptosis. Therefore, we propose that MOP be used as an ideal antioxidant to alleviate radiation-induced oxidation damage in cancer patients.
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Affiliation(s)
- Ruiyue Yang
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University, Beijing 100191, China; E-Mails: (R.Y.); (J.W.); (Z.L.); (X.P.); (X.H.)
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, Beijing 100730, China
| | - Junbo Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University, Beijing 100191, China; E-Mails: (R.Y.); (J.W.); (Z.L.); (X.P.); (X.H.)
| | - Zhigang Liu
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University, Beijing 100191, China; E-Mails: (R.Y.); (J.W.); (Z.L.); (X.P.); (X.H.)
| | - Xinrong Pei
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University, Beijing 100191, China; E-Mails: (R.Y.); (J.W.); (Z.L.); (X.P.); (X.H.)
| | - Xiaolong Han
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University, Beijing 100191, China; E-Mails: (R.Y.); (J.W.); (Z.L.); (X.P.); (X.H.)
| | - Yong Li
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University, Beijing 100191, China; E-Mails: (R.Y.); (J.W.); (Z.L.); (X.P.); (X.H.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel./Fax: +86-10-82801177
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Bansal P, Paul P, Shankar G, Munjal D, Nayak P, Priyadarsini K, Unnikrishnan M. Flavonoid rich fraction of Pilea microphylla (L.) attenuates metabolic abnormalities and improves pancreatic function in C57BL/KsJ-db/db mice. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.bionut.2011.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Khan NM, Sandur SK, Checker R, Sharma D, Poduval TB, Sainis KB. Pro-oxidants ameliorate radiation-induced apoptosis through activation of the calcium-ERK1/2-Nrf2 pathway. Free Radic Biol Med 2011; 51:115-28. [PMID: 21530647 DOI: 10.1016/j.freeradbiomed.2011.03.037] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 03/18/2011] [Accepted: 03/28/2011] [Indexed: 01/17/2023]
Abstract
There are no reports describing the ability of pro-oxidants to protect against radiation-induced apoptosis. Activation of the redox-sensitive transcription factor Nrf2 by low levels of ROS is known to protect against oxidative stress-induced cell death. In this study, hydrogen peroxide, diethylmaleate, and 1,4-naphthoquinone (NQ) exhibited complete protection against radiation-induced cell death in lymphocytes as estimated by propidium iodide staining. Radioprotection by NQ was demonstrated by inhibition of caspase activation, decrease in cell size, DNA fragmentation, nuclear blebbing, and clonogenic assay. Interestingly, NQ offered protection to lymphocytes even when added to cells postirradiation. NQ increased intracellular ROS levels and decreased GSH levels. NQ activated Nrf2 and increased the expression of the cytoprotective gene heme oxygenase-1 in lymphocytes. NQ increased ERK phosphorylation, which is upstream of Nrf2, and this ERK activation was through increased intracellular calcium levels. Administration of NQ to mice offered protection against whole-body irradiation (WBI)-induced apoptosis in splenic lymphocytes and loss of viability of spleen and bone marrow cells. It restored WBI-mediated changes in hematological parameters and functional responses of lymphocytes. Importantly, NQ rescued mice against WBI-induced mortality. These results demonstrated that a pro-oxidant such as NQ can protect against radiation-induced apoptosis by activation of multiple prosurvival mechanisms including activation of the calcium-ERK1/2-Nrf2 pathway.
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Affiliation(s)
- Nazir M Khan
- Bio-Medical Group, Radiation Biology & Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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24
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Kunwar A, Jayakumar S, Bhilwade HN, Bag PP, Bhatt H, Chaubey RC, Priyadarsini KI. Protective effects of selenocystine against γ-radiation-induced genotoxicity in Swiss albino mice. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2011; 50:271-280. [PMID: 21259021 DOI: 10.1007/s00411-011-0352-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Accepted: 01/05/2011] [Indexed: 05/30/2023]
Abstract
Selenocystine (CysSeSeCys), a diselenide aminoacid exhibiting glutathione peroxidase-like activity and selective antitumor effects, was examined for in vivo antigenotoxic and antioxidant activity in Swiss albino mice after exposure to a sublethal dose (5 Gy) of γ-radiation. For this, CysSeSeCys was administered intraperitoneally (i.p.) to mice at a dosage of 0.5 mg/kg body weight for 5 consecutive days prior to whole-body γ-irradiation. When examined in the hepatic tissue, CysSeSeCys administration reduced the DNA damage at 30 min after radiation exposure by increasing the rate of DNA repair. Since antigenotoxic agents could alter the expression of genes involved in cell cycle arrest and DNA repair, the transcriptional changes in p53, p21 and GADD45α were monitored in the hepatic tissue by real-time PCR. The results show that CysSeSeCys alone causes moderate induction of these three genes. However, CysSeSeCys pretreatment resulted in a suppression of radiation-induced enhancement of p21 and GADD45α expression, but did not affect p53 expression. Further analysis of radiation-induced oxidative stress markers in the same tissue indicated that CysSeSeCys significantly inhibits lipid peroxidation and prevents the depletion of antioxidant enzymes and glutathione (GSH) levels. Additionally, it also prevents radiation-induced DNA damage in other radiation sensitive cellular systems like peripheral leukocytes and bone marrow, which was evident by a decrease in comet parameters and micronucleated polychromatic erythrocytes (mn-PCEs) frequency, respectively. Based on these observations, it is concluded that CysSeSeCys exhibits antigenotoxic effects, reduces radiation-induced oxidative stress, and is a promising candidate for future exploration as a radioprotector.
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Affiliation(s)
- Amit Kunwar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India.
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25
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Evaluating the radioprotective effect of hesperidin in the liver of Swiss albino mice. Eur J Pharmacol 2011; 658:206-12. [PMID: 21371459 DOI: 10.1016/j.ejphar.2011.02.031] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 02/16/2011] [Accepted: 02/17/2011] [Indexed: 02/04/2023]
Abstract
The present study was aimed to evaluate the radioprotective efficacy of hesperidin, a flavonone glycoside against X-ray radiation-induced cellular damage in the liver of Swiss albino mice. The first phase of the study was carried out to fix the effective concentration of hesperidin by performing a 30 days of survival studies using different graded doses [12.5, 25, 50 and 100mg/kg body weight] of hesperidin administered orally to mice via intragastric intubations for seven consecutive days prior to exposure of whole body radiation (10 Gy). Based on the results of survival studies, the effective dose of hesperidin was fixed which was then administered to animals orally via intragastric intubations for seven consecutive days prior to exposure of whole body radiation (4 Gy) to evaluate its radioprotective efficacy by performing various biochemical estimations, comet assay, DNA fragmentation assay and histopathological studies in the liver of Swiss albino mice. The results indicated that radiation-induced decrease in the levels of endogenous antioxidant enzymes and increase in lipid peroxidative index, DNA damage and comet parameters were altered by pre-administration with the effective dose of hesperidin [25mg/kg body weight] which restored the antioxidant status to near normal and decreased the levels of lipid peroxidative index, DNA damage and comet parameters. These results were further confirmed by histopathological examinations which indicated that pre-administration with the effective dose of hesperidin reduced the hepatic damage induced by radiation. Thus the current study shows hesperidin to be an effective radioprotector against radiation induced damage in the liver of mice.
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26
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Radiation-Induced Testicular Injury and Its Amelioration by Tinospora cordifolia (An Indian Medicinal Plant) Extract. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2011; 2011:643847. [PMID: 21350610 PMCID: PMC3042631 DOI: 10.1155/2011/643847] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Accepted: 01/04/2011] [Indexed: 01/22/2023]
Abstract
The primary objective of this investigation is to determine the deleterious effects of sub lethal gamma radiation on testes and their possible inhibition by Tinospora cordifolia extract (TCE). For this purpose, one group of male Swiss albino mice was exposed to 7.5 Gy gamma radiation to serve as the irradiated control, while the other group received TCE (75 mg/kg b. wt./day) orally for 5 consecutive days half an hr before irradiation to serve as experimental. Exposure of animals to 7.5 Gy gamma radiation resulted into significant decrease in body weight, tissue weight, testes- body weight ratio and tubular diameter up to 15 days of irradiation. Cent percent mortality was recorded by day 17th in irradiated control, whereas all animals survived in experimental group. TCE pretreatment rendered significant increase in body weight, tissue weight, testes- body weight ratio and tubular diameter at various intervals as compared to irradiated group. Radiation induced histological lesions in testicular architecture were observed more severe in irradiated control then the experimental. TCE administration before irradiation significantly ameliorated radiation induced elevation in lipid peroxidation and decline in glutathione concentration in testes. These observations indicate the radio- protective potential of Tinospora cordifolia root extract in testicular constituents against gamma irradiation in mice.
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27
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Menkovic N, Juranic Z, Stanojkovic T, Raonic-Stevanovic T, Savikin K, Zdunić G, Borojevic N. Radioprotective activity of Gentiana lutea extract and mangiferin. Phytother Res 2011; 24:1693-6. [PMID: 21031630 DOI: 10.1002/ptr.3225] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Radioprotective/sensitizing actions of Gentiana lutea aqueous-ethanol extract and mangiferin on radiation-induced effects on different types of cells were investigated. The study focused on the decreasing survival of normal human immunocompetent cells, the survival of the malignant cells in vitro, and the survival of ex vivo irradiated cells before and after consumption of the extract by healthy volunteers. The in vitro experiments showed that mangiferin could inhibit cytotoxic action of ionizing irradiation (doses of 6 and 8 Gy) only on normal resting human PBMC, not stimulated for proliferation. Orally consumed G. lutea extract showed the potential to reduce the cytotoxic effect of x-ray irradiation on normal human immunocompetent cells PBMC of some healthy people, without changing the susceptibility of malignant cells to be destroyed by irradiation. Since the radioprotective effect was individually dependent, further clinical studies are needed.
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Affiliation(s)
- Nebojsa Menkovic
- Institute for Medicinal Plants Research, Tadeusa Koscuska 1, Belgrade, 11000 Serbia
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28
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Radioprotective effect of geraniin via the inhibition of apoptosis triggered by γ-radiation-induced oxidative stress. Cell Biol Toxicol 2010; 27:83-94. [PMID: 20680428 DOI: 10.1007/s10565-010-9172-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 07/15/2010] [Indexed: 11/25/2022]
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29
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Modarresi Chahardehi A, Ibrahim D, Fariza Sulaiman S. Antioxidant, Antimicrobial Activity and Toxicity Test of Pilea microphylla. Int J Microbiol 2010; 2010:826830. [PMID: 20652052 PMCID: PMC2905935 DOI: 10.1155/2010/826830] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Accepted: 04/04/2010] [Indexed: 12/01/2022] Open
Abstract
A total of 9 plant extracts were tested, using two different kinds of extracting methods to evaluate the antioxidant and antimicrobial activities from Pilea microphylla (Urticaceae family) and including toxicity test. Antioxidant activity were tested by using DPPH free radical scavenging, also total phenolic contents and total flavonoid contents were determined. Toxicity assay carried out by using brine shrimps. Methanol extract of method I (ME I) showed the highest antioxidant activity at 69.51 +/- 1.03. Chloroform extract of method I (CE I) showed the highest total phenolic contents at 72.10 +/- 0.71 and chloroform extract of method II (CE II) showed the highest total flavonoid contents at 60.14 +/- 0.33. The antimicrobial activity of Pilea microphylla extract was tested in vitro by using disc diffusion method and minimum inhibitory concentration (MIC). The Pilea microphylla extract showed antibacterial activity against some Gram negative and positive bacteria. The extracts did not exhibit antifungal and antiyeast activity. The hexane extract of method I (HE I) was not toxic against brine shrimp (LC50 value was 3880 mug/ml). Therefore, the extracts could be suitable as antimicrobial and antioxidative agents in food industry.
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Affiliation(s)
- Amir Modarresi Chahardehi
- Industrial Biotechnology Research Laboratory, School of Biological Sciences, Universiti Sains Malaysia, Penang, 11800 Minden, Malaysia
| | - Darah Ibrahim
- Industrial Biotechnology Research Laboratory, School of Biological Sciences, Universiti Sains Malaysia, Penang, 11800 Minden, Malaysia
| | - Shaida Fariza Sulaiman
- Phytochemistry laboratory, School of Biological Sciences, Universiti Sains Malaysia, Penang, 11800 Minden, Malaysia
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Chandrashekhar VM, Muchandi AA, Sudi SV, Ganapty S. Hepatoprotective activity of Stereospermum suaveolens against CCl4-induced liver damage in albino rats. PHARMACEUTICAL BIOLOGY 2010; 48:524-528. [PMID: 20645794 DOI: 10.3109/13880200903173601] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The present study aims to evaluate the hepatoprotective activity of Stereospermum suaveolens DC (Bignoniaceae). Hepatoprotective activity is studied by carbon tetrachloride (CCl(4))-induced liver damage in albino rats. The degree of protection in this activity has been measured by using biochemical parameters such as serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), alkaline phosphatase (ALP), total bilirubin, LDL-cholesterol and SOD, CAT, GSH, total thiols, NO, and lipid peroxidation in liver tissue homogenate. The results suggest that the methanol stem bark extract of Stereospermum suaveolens at the doses 125, 250, and 500 mg/kg and reference standard Liv-52 treated group produced significant (p <0.001) hepatoprotection against CCl(4)-induced liver damage by decreasing the activities of serum enzymes, bilirubin and lipid peroxidation. The extract significantly (p <0.001) increased levels of SOD, CAT, GSH and total thiols, as compared to control group. Histopathological studies further substantiate the protective effect of the extract. It was concluded that methanol stem bark extract of Stereospermum suaveolens showed effective hepatoprotective activity.
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Affiliation(s)
- V M Chandrashekhar
- Department of Pharmacology, Hanagal Shri Kumareshwar College of Pharmacy, B.V.V.S. Campus, Bagalkot, Karnataka, India.
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31
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Trends in the development of radioprotective agents. Drug Discov Today 2007; 12:794-805. [DOI: 10.1016/j.drudis.2007.07.017] [Citation(s) in RCA: 295] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2007] [Revised: 07/15/2007] [Accepted: 07/18/2007] [Indexed: 02/01/2023]
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Parihar VK, Dhawan J, Kumar S, Manjula SN, Subramanian G, Unnikrishnan MK, Rao CM. Free radical scavenging and radioprotective activity of dehydrozingerone against whole body gamma irradiation in Swiss albino mice. Chem Biol Interact 2007; 170:49-58. [PMID: 17765885 DOI: 10.1016/j.cbi.2007.07.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2007] [Revised: 06/29/2007] [Accepted: 07/05/2007] [Indexed: 10/23/2022]
Abstract
Dehydrozingerone (DZ) was explored for in vitro-in vivo antioxidant potential and in vivo radioprotective activity against whole body gamma irradiation in Swiss albino mice. DZ scavenged the ABTS (2, 2'-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) and DPPH (1, 1-dipehnyl-2-picrylhydrazyl) free radicals at room temp. DZ reduced Fe (III) to Fe (II) at pH 7.4 and scavenged the NADH/phenazine methosulfate generated superoxide radical in cell free system. DZ also scavenged the nitric oxide radical generated by sodium nitroprusside. To evaluate the radioprotective activity, mice were exposed to whole body gamma irradiation 30 min after the drug treatment at a dose rate of 1.66 Gy/min. Pretreatment with DZ 75, 100 and 125 mg/kg, i.p. reduced the radiation induced mortality and increased the mean survival times (MSTs). An i.p. dose of DZ 100 mg/kg was found the most effective dose in preventing radiation sickness and increasing the MST. Pretreatment DZ100 mg/kg maintained the spleen index (spleen weight/body weight x 100) and stimulates the endogenous spleen colony forming units (CFU). Pretreatment with DZ100 mg/kg maintained the villus height close to normal, prevents mucosal erosion and basement membrane damage in irradiated mice jejunum. However, no significant reductions in dead, inflammatory and mitotic cells were observed in DZ pretreated mice, but there was an increased in crypt cells proliferation and regeneration. Pretreatment with DZ100 mg/kg significantly elevated the endogenous antioxidant enzymes (GSH, GST and SOD) in mice at 2, 4 and 8 h post sham irradiation. Radiation induced fall in endogenous antioxidant enzymes was significantly prevented by DZ pretreatment. Pretreatment with DZ 75 and 100 mg/kg reduced the radiation induced micronucleated polychromatic erythrocytes (MPCE) and normochromatic erythrocytes (MNCE) in mice bone marrow. DZ also maintained the polychromatic erythrocytes (PCE) and normochromatic erythrocytes (NCE) ratio (P/N ratio) in irradiated mice. Dose modifying factor (DMF) was calculated by using the graded radiation dose (8.0, 9.0, 9.5 and 10 Gy). DZ 100 mg/kg elevated radiation LD(50) from 9.1 to 10.0 Gy, indicating the DMF of 1.09.
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Affiliation(s)
- Vipan Kumar Parihar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal, India
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