Abstract:
BACKGROUND:Opuntia dillenii is an invasive plant well established in the harsh South-Eastern arid zone of Sri Lanka. Evidence suggests it is likely that the endophytic fungal populations of O. dillenii assist the host in overcoming biotic and abiotic stress by producing biologically active metabolites. With this in mind there is potential to discover novel natural products with useful biological activities from this hitherto poorly investigated source. Consequently, an investigation of the antimicrobial activities of the endophytes of O. dillenii, that occupies a unique ecological niche, may well provide useful leads in the discovery of new pharmaceuticals. METHODS:Endophytic fungi were isolated from the surface sterilized cladodes and flowers of O. dillenii using several nutrient media and the antimicrobial activities were evaluated against three Gram-positive and two Gram-negative bacteria and Candida albicans. The two most bioactive fungi were identified by colony morphology and DNA sequencing. The secondary metabolite of the endophyte Fusarium sp. exhibiting the best activity was isolated via bioassay guided chromatography. The chemical structure was elucidated from the ESIMS and NMR spectroscopic data obtained for the active metabolite. The minimum inhibitory concentrations (MICs) of the active compound were determined. RESULTS:Eight endophytic fungi were isolated from O. dillenii and all except one showed antibacterial activities against at least one of the test bacteria. All extracts were inactive against C. albicans. The most bioactive fungus was identified as Fusarium sp. and the second most active as Aspergillus niger. The structure of the major antibacterial compound of the Fusarium sp. was shown to be the tetramic acid derivative, equisetin. The MIC's for equisetin were 8 μg mL(-1) against Bacillus subtilis, 16 μg mL(-1) against Staphylococcus aureus and Methicillin Resistant Staphylococcus aureus (MRSA). CONCLUSIONS:O. dillenii, harbors several endophytic fungi capable of producing antimicrobial substances with selective antibacterial properties. By producing biologically active secondary metabolites, such as equisetin isolated from the endophytic Fusarium sp., the endophytic fungal population may be assisting the host to successfully withstand stressful environmental conditions. Further investigations on the secondary metabolites produced by these endophytes may provide additional drug leads.
journal_name
BMC Complement Altern Medjournal_title
BMC complementary and alternative medicineauthors
Ratnaweera PB,de Silva ED,Williams DE,Andersen RJdoi
10.1186/s12906-015-0722-4subject
Has Abstractpub_date
2015-07-10 00:00:00pages
220issn
1472-6882pii
10.1186/s12906-015-0722-4journal_volume
15pub_type
杂志文章abstract:BACKGROUND:Tangshen Formula (TSF) is a traditional Chinese medicine for the treatment of diabetic kidney disease (DKD). Liver-type fatty acid binding protein (L-FABP) is expressed in various tissues, including the kidney, where it is known as urinary L-FABP. Other studies demonstrated that urinary L-FABP may be a usefu...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1186/s12906-016-1228-4
更新日期:2016-07-26 00:00:00
abstract:BACKGROUND:Type 2 diabetes mellitus (T2DM) is a major risk factor for cardiovascular disease, and the prevalence has increased significantly in recent decades to epidemic proportions in China. Individually, fenugreek (Trigonella foenum graecum) seed, mulberry (Morus alba L.) leaf and American ginseng (Panax quinquefoli...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-017-1848-3
更新日期:2017-07-05 00:00:00
abstract:BACKGROUND:Yukyung karne (YK) is a traditional Tibetan formulation used for many centuries for the treatment of ovarian cancer. However, the pharmacological basis of its anticancer property is not well understood. In the present study, the anticancer property of YK was investigated in cell culture. METHODS:The growth ...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-14-380
更新日期:2014-10-07 00:00:00
abstract:BACKGROUND:Danqi pill (DQP) is one of the most widely prescribed formulas and has been shown to have remarkable protective effect on coronary heart disease (CHD). However, its regulatory effects on lipid metabolism disorders haven't been comprehensively studied so far. We aimed to explore the effects of DQP on Peroxiso...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-016-1083-3
更新日期:2016-03-22 00:00:00
abstract:BACKGROUND:The young shoots of Rubus idaeus are traditionally used as a herbal remedy in common cold, fever and flu-like infections yet there is no research concerning this plant material. The aim of the study was to evaluate the chemical composition and biological properties of raspberry shoots from 11 cultivar variet...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-14-480
更新日期:2014-12-12 00:00:00
abstract:BACKGROUND:Alpinia oxyphylla is a common remedy in traditional Chinese medicine. Yakuchinone A is a major constituent of A. oxyphylla and exhibits anti-inflammatory, antitumor, antibacterial, and gastric protective activities. METHODS:Antioxidant and antitumor characteristics of yakuchinone A in skin cancer cells as w...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-13-237
更新日期:2013-09-26 00:00:00
abstract:BACKGROUND:Daming capsule (DMC), a traditional Chinese formula, has a lipid-modulating action with reduced adverse side effects as compared with other lipid lowering compounds. Since endothelial dysfunction often accompanies the hyperlipidemic state, we hypothesize that DMC might restore endothelial dysfunction produce...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-12-21
更新日期:2012-03-24 00:00:00
abstract:BACKGROUND:During recent years the market for homeopathic education media has increasingly diversified with old (books, seminars) and new media (video-seminars, pc-programs, homeo-wiki and internet-courses). However, little is known about homeopaths' preferences in using educational media and their requirements of this...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-12-95
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abstract:BACKGROUND:Liver disease is the major cause of serious health problem leading to morbidity and mortality worldwide and the problem has increased in search for hepatotherapeutic agents from plants. The present study was designed to compare the probable hepatoprotective activity of olive oil and N. sativa oil on CCl4 ind...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-016-1422-4
更新日期:2016-11-04 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-019-2728-9
更新日期:2019-12-05 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-016-1352-1
更新日期:2016-09-29 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-016-1155-4
更新日期:2016-06-06 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-14-98
更新日期:2014-03-12 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-019-2756-5
更新日期:2019-12-11 00:00:00
abstract:BACKGROUND:In Pakistan Fagonia olivieri (Zygophyllaceae) is commonly used in the indigenous system of medicine for treatment of conditions like diabetes, cancer, fever, asthma, toothache, stomach troubles and kidney disorders. This study evaluated the crude methanol extract of F. olivieri (FOM) and its derived fraction...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-13-167
更新日期:2013-07-10 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-13-19
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
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更新日期:2016-07-22 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-017-1750-z
更新日期:2017-04-26 00:00:00
abstract:BACKGROUND:The skin is chronically exposed to endogenous and environmental pro-oxidant agents, leading to the harmful generation of reactive oxygen species. Antioxidant is vital substances which possess the ability to protect the body from damage cause by free radicals induce oxidative stress. Alpinia zerumbet, a tradi...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-12-106
更新日期:2012-07-24 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/s12906-016-1011-6
更新日期:2016-01-28 00:00:00
abstract:BACKGROUND:Isoflavones are naturally occurring plant chemicals belonging to the "phytoestrogen" class. The aim of the present study was to examine the effects of isoflavones obtained from Cordyceps sinensis (CSIF) on development of estrogen deficiency-induced osteoporosis in ovariectomized rats. METHODS:After the rats...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-14-484
更新日期:2014-12-13 00:00:00
abstract:BACKGROUND:Much research has been done in Northeast Asia to show the efficacy of traditional medicine. While MEDLINE contains many biomedical articles including those on traditional medicine, it does not categorize those articles by specific research area. The aim of this study was to provide a method that searches for...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
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更新日期:2017-01-28 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
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更新日期:2016-01-04 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-11-43
更新日期:2011-05-26 00:00:00
abstract:BACKGROUND:Complementary medicines (CMs) are popular amongst Australians and community pharmacy is a major supplier of these products. This study explores pharmacy customer use, attitudes and perceptions of complementary medicines, and their expectations of pharmacists as they relate to these products. METHODS:Pharmac...
journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-10-38
更新日期:2010-07-20 00:00:00
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journal_title:BMC complementary and alternative medicine
pub_type: 杂志文章
doi:10.1186/1472-6882-13-26
更新日期:2013-01-31 00:00:00