@article {130, title = {Growth Inhibitory Activity of Kakadu Plum Extracts Against the Opportunistic Pathogenclostridium Perfringens: New Leads in the Prevention and Treatment of Clostridial Myonecrosis}, journal = {Pharmacognosy Journal}, volume = {8}, year = {2016}, month = {December 2015}, pages = {144-153}, type = {Original Article}, chapter = {144}, abstract = {

Introduction: Clostridium perfringens is the etiological agent of clostridial myonecrosis and enteritis necroticans. Infections result in exotoxin production, tissue necrosis and unless promptly treated, may result in death. Terminalia ferdinandiana (Kakadu plum) fruit has documented therapeutic properties as a general antiseptic agent. Fruit extracts have been reported to inhibit the growth of an extensive panel of pathogenic bacteria. Leaf extracts have also been shown to block the growth of several bacterial species associated with autoimmune inflammatory diseases. Methods: T. ferdinandiana fruit and leaf solvent extracts were investigated for growth inhibitory activity by disc diffusion assay against a clinical strain of Clostridium perfringens. Their MIC values were determined to quantify and compare their efficacies. Toxicity was determined using the Artemia franciscana nauplii bioassay. Active extracts were analysed by non-targeted HPLC-QTOF mass spectroscopy (with screening against 3 compound databases) for the identification and characterisation of individual components in the crude plant extracts. Results: Methanolic and aqueous T. ferdinandiana fruit and leaf extracts, as well as the leaf ethyl acetate extract, displayed growth inhibitory activity in the disc diffusion assay against C. perfringens. The leaf extracts were generally more potent growth inhibitors than the corresponding fruit extracts, although the aqueous fruit extract had substantially greater efficacy than the aqueous leaf extract. The methanolic and ethyl acetate leaf extracts were particularly potent growth inhibitors, with MIC values of 206 and 117 \μg/ml respectively. The fruit methanolic extract also displayed good efficacy, with an MIC of 716 \μg/ml. In contrast, the chloroform and hexane extracts of both fruit and leaf were completely devoid of growth inhibitory activity. All T. ferdinandiana extracts were either nontoxic or of low toxicity in the Artemia fransiscana bioassay. Non-biased phytochemical analysis of the methanolic and ethyl acetate leaf extracts revealed the presence of high relative levels of a diversity of galloand ellagi- tannins. Conclusion: The low toxicity of the T. ferdinandiana extracts and the potent growth inhibitory bioactivity of the leaf methanolic and ethyl acetate extracts against C. perfringens indicates their potential as medicinal agents in the treatment and prevention of clostridial myonecrosis and enteritis necroticans. Metabolomic profiling studies indicate that these extracts contained a diversity of tannins.

}, keywords = {Antibacterial extracts, Antioxidant, Australian medicinal plants, Enteritis necroticans, Gas gangrene., Kakadu plum, Myonecrosis, Terminalia ferdinandiana}, doi = {10.5530/pj.2016.2.8}, author = {Mitchell Henry Wright and Joseph Sirdaarta and Ben Matthews and Anthony Carlson Greene and Ian Edwin Cock} } @article {30, title = {Tannin components and inhibitory activity of Kakadu plum leaf extracts against microbial triggers of autoimmune inflammatory diseases}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {01/2015}, pages = {18-31}, type = {Original Article}, chapter = {18}, abstract = {

Introduction: Autoimmune inflammatory diseases can be triggered by specific bacteria in susceptible individuals. Terminalia ferdinandiana (Kakadu plum) has documented therapeutic properties as a general antiseptic agent. However, the high ascorbic acid levels in Kakadu plum fruit may interfere with this activity. Methods: T. ferdinandiana leaf solvent extracts were investigated by disc diffusion assay against a panel of bacteria known to trigger autoimmune inflammatory diseases.Their MIC values were determined to quantify and compare their efficacies.Toxicity was determined using the Artemia franciscana nauplii bioassay. Non-targeted HPLC separation of crude extracts coupled to high resolution time-of-flight (TOF) mass spectroscopy with screening against 3 compound databases was used for the identification and characterisation of individual components in crude plant extracts. Results: Methanolic, aqueous and ethyl acetate T. Ferdinandiana leaf extracts displayed potent antibacterial activity in the disc diffusion assay against the bacterial triggers of rheumatoid arthritis, ankylosing spondylitis and multiple sclerosis. The ethyl acetate extract had the most potent inhibitory activity, with MIC values less than 120 \μg/ml against P. mirabilis and A. baylyi (both reference and clinical strains). The ethyl acetate extract had similar potency against K. pneumonia (both reference and clinical strains), but had higher MIC values (2733 \μg/ml) against P. aeruginosa. The methanolic extract was also a potent inhibitor of bacterial growth, with MIC values generally \< 1000 \μg/ml. In comparison, the water, chloroform and hexane leaf extracts were all substantially less potent antibacterial agents, with MICs values generally well over 1000 \μg/ml. All T. ferdinandiana leaf extracts were either nontoxic or of low toxicity in the Artemia fransiscana bioassay.Non-biased phytochemical analysis of the ethyl acetate extract revealed the presence of high levels of tannins (exifone (4-galloylpyrogallol), ellagic acid dehydrate, trimethylellagic acid, chebulic acid, corilagin, punicalin, castalagin and chebulagic acid). Conclusion: The low toxicity of the T. ferdinandiana leaf extracts and their potent inhibitory bioactivity against the bacterial triggers of autoimmune inflammatory disorders indicates their potential as medicinal agents in the treatment and prevention of these diseases.

}, keywords = {Acinetobacter baylyi, ankylosing spondylitis, Klebsiella pneumoniae, multiple sclerosis, Proteus mirabilis, Pseudomonas aeruginosa., rheumatoid arthritis, Terminalia ferdinandiana}, doi = {10.5530/pj.2015.7.2}, author = {R Courtney and J Sirdaarta and B Matthews and I E Cock} } @article {1464, title = {Tannin components and inhibitory activity of Kakadu plum leaf extracts against microbial triggers of autoimmune inflammatory diseases}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {27th Nov, 2014}, pages = {18-31}, type = {Original Article}, chapter = {18}, abstract = {

Introduction: Autoimmune inflammatory diseases can be triggered by specific bacteria in susceptible individuals. Terminalia ferdinandiana (Kakadu plum) has documented therapeutic properties as a general antiseptic agent. However, the high ascorbic acid levels in Kakadu plum fruit may interfere with this activity. Methods: T. ferdinandiana leaf solvent extracts were investigated by disc diffusion assay against a panel of bacteria known to trigger autoimmune inflammatory diseases.Their MIC values were determined to quantify and compare their efficacies. Toxicity was determined using the Artemia franciscana nauplii bioassay. Non-targeted HPLC separation of crude extracts coupled to high resolution time-of-flight (TOF) mass spectroscopy with screening against 3 compound databases was used for the identification and characterisation of individual components in crude plant extracts. Results: Methanolic, aqueous and ethyl acetate T. Ferdinandiana leaf extracts displayed potent antibacterial activity in the disc diffusion assay against the bacterial triggers of rheumatoid arthritis, ankylosing spondylitis and multiple sclerosis. The ethyl acetate extract had the most potent inhibitory activity, with MIC values less than 120 \μg/ml against P. mirabilis and A. baylyi (both reference and clinical strains). The ethyl acetate extract had similar potency against K. pneumonia(both reference and clinical strains), but had higher MIC values (2733 \μg/ml) against P. aeruginosa. The methanolic extract was also a potent inhibitor of bacterial growth, with MIC values generally \< 1000 \μg/ml. In comparison, the water, chloroform and hexane leaf extracts were all substantially less potent antibacterial agents, with MICs values generally well over 1000 \μg/ml. All T. ferdinandiana leaf extracts were either nontoxic or of low toxicity in the Artemia fransiscana bioassay.Non-biased phytochemical analysis of the ethyl acetate extract revealed the presence of high levels of tannins (exifone (4-galloylpyrogallol), ellagic acid dehydrate, trimethylellagic acid, chebulic acid, corilagin, punicalin, castalagin and chebulagic acid). Conclusion: The low toxicity of the T. ferdinandiana leaf extracts and their potent inhibitory bioactivity against the bacterial triggers of autoimmune inflammatory disorders indicates their potential as medicinal agents in the treatment and prevention of these diseases.

Key words: Terminalia ferdinandiana, rheumatoid arthritis, ankylosing spondylitis, multiple sclerosis, Proteus mirabilis, Klebsiella pneumoniae , Acinetobacter baylyi, Pseudomonas aeruginosa.

}, keywords = {Acinetobacter baylyi, ankylosing spondylitis, Klebsiella pneumoniae, multiple sclerosis, Proteus mirabilis, Pseudomonas aeruginosa., rheumatoid arthritis, Terminalia ferdinandiana}, author = {R. Courtney and J. Sirdaarta and Matthews B and I.E. Cock} }