<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ian Edwin Cock</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Duboisia leichhardtii (F.Muell.) Extracts Inhibit The Growth of Bacterial Triggers of Selected Autoimmune Inflammatory Diseases</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ankylosing spondylitis</style></keyword><keyword><style  face="normal" font="default" size="100%">Corkwood</style></keyword><keyword><style  face="normal" font="default" size="100%">Hyoscyamine.</style></keyword><keyword><style  face="normal" font="default" size="100%">multiple sclerosis</style></keyword><keyword><style  face="normal" font="default" size="100%">Rheumatic Heart Disease</style></keyword><keyword><style  face="normal" font="default" size="100%">rheumatoid arthritis</style></keyword><keyword><style  face="normal" font="default" size="100%">Scopolamine</style></keyword><keyword><style  face="normal" font="default" size="100%">Solanaceae</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">September 2016</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">8</style></volume><pages><style face="normal" font="default" size="100%">542-550</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; &lt;em&gt;Duboisia leichhardtii &lt;/em&gt;F.Muell. is a medium to large tree which is native to subtropical regions of eastern Australia.&lt;em&gt; Duboisia&lt;/em&gt; spp. contain a number of psychoactive tropane and pyrrolidine alkaloids with reported antibacterial activity. Despite this, &lt;em&gt;D. leichhardtii&lt;/em&gt; leaf extracts have not been rigorously examined for growth inhibitory properties against many bacteria, including the bacterial triggers of autoimmune inflammatory diseases. &lt;strong&gt;Methods:&lt;/strong&gt; The antimicrobial activity of &lt;em&gt;D. leichhardtii&lt;/em&gt; leaf solvent extracts was investigated by disc diffusion and growth time course assays against a panel of bacterial triggers of autoimmune diseases. The growth inhibitory activity was further quantified by MIC determination and growth time course assays. Toxicity was determined using the &lt;em&gt;Artemia franciscana&lt;/em&gt; nauplii bioassay. &lt;strong&gt;Results: &lt;/strong&gt;Methanolic and aqueous &lt;em&gt;D. leichhardtii &lt;/em&gt;leaf solvent extracts were potent inhibitors of the bacterial triggers of rheumatoid arthritis and ankylosing spondylitis. The methanolic extract displayed the most potent bacterial growth inhibitory activity. It was particularly potent against &lt;em&gt;P. mirabilis &lt;/em&gt;(MICs of 85 and 116 &lt;em&gt;&amp;mu;&lt;/em&gt;g/mL against reference and clinical strains respectively) and &lt;em&gt;P. vulgaris&lt;/em&gt; (MIC of 187 &lt;em&gt;&amp;mu;&lt;/em&gt;g/mL). The methanolic extract was also a good inhibitor of &lt;em&gt;K. pneumoniae&lt;/em&gt; growth (MICs of 143 and 118 &lt;em&gt;&amp;mu;&lt;/em&gt;g/mL against reference and clinical strains respectively). The aqueous and ethyl acetate extracts were also potent bacterial growth inhibitors, albeit with higher MIC values. The antibacterial activity of the methanolic and aqueous &lt;em&gt;D. leichhardtii &lt;/em&gt;leaf extracts were further investigated by growth time course assays which showed significant growth inhibition in cultures of &lt;em&gt;P. mirabilis&lt;/em&gt; and &lt;em&gt;K. pneumoniae &lt;/em&gt;within 1 h of exposure. All extracts were determined to be nontoxic in the &lt;em&gt;Artemia franciscana &lt;/em&gt;nauplii bioassay, indicating their safety for use in preventing these autoimmune inflammatory diseases. &lt;strong&gt;Conclusions:&lt;/strong&gt; The lack of toxicity of the &lt;em&gt;D. leichhardtii&lt;/em&gt; leaf extracts and their growth inhibitory bioactivity against the bacterial triggers of rheumatoid arthritis and ankylosing spondylitis indicate their potential in the development of new therapies targeting the onset of these diseases.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue><work-type><style face="normal" font="default" size="100%">Original Article</style></work-type><section><style face="normal" font="default" size="100%">542</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Ian Edwin Cock &lt;/strong&gt;&lt;/p&gt;

&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;School of Natural Sciences, Griffith University, 170 Kessels Rd, Nathan, Brisbane, Queensland 4111, AUSTRALIA.&lt;/p&gt;

&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Environmental Futures Research Institute, Griffith University, 170 Kessels Rd, Nathan, Brisbane, Queensland 4111, Australia.&lt;/p&gt;
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