<?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%">Charlotte Mungho Tata</style></author><author><style face="normal" font="default" size="100%">Constance Rufaro Sewani-Rusike</style></author><author><style face="normal" font="default" size="100%">Olukayode Aremu</style></author><author><style face="normal" font="default" size="100%">Opeoluwa Oyehan Oyedeji</style></author><author><style face="normal" font="default" size="100%">Benedicta Ngwenchi Nkeh-Chungag</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Antihypertensive Effects of Osteospermum Imbricatum in Two Hypertensive Rat Models</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%">Antioxidants</style></keyword><keyword><style  face="normal" font="default" size="100%">High blood pressure</style></keyword><keyword><style  face="normal" font="default" size="100%">Nω-Nitro-L-arginine methyl ester</style></keyword><keyword><style  face="normal" font="default" size="100%">Spontaneously hypertensive rats</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2021</style></year><pub-dates><date><style  face="normal" font="default" size="100%">May 2021</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">13</style></volume><pages><style face="normal" font="default" size="100%">744-751</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Introduction: &lt;/strong&gt;&lt;em&gt;Osteospermum imbricatum &lt;/em&gt;is used traditionally in Eastern Cape, South Africa for the management of hypertension, chest and stomach complaints. This study was aimed at investigating the antioxidant and antihypertensive effects of this plant. &lt;strong&gt;Methods: &lt;/strong&gt;Antioxidant capacity was determined by radical scavenging assays and ferric reducing antioxidant power. Antihypertensive effects after once off treatment with the leaf/root extracts (500 mg/kg) were evaluated in spontaneously hypertensive rats (SHR). The effect of the extracts on established hypertension was determined in Wistar rats treated with Nω-Nitro-L-arginine methyl ester (L-NAME) (40 mg/kg/day) for 4 weeks followed by co-treatment with L-NAME and extracts (200 mg/kg and 400 mg/kg) or amlodipine (5 mg/kg) or normal saline for 4 more weeks. &lt;strong&gt;Results:&lt;/strong&gt; The concentration at which there was 50 % inhibition (IC&lt;sub&gt;50&lt;/sub&gt;) of DPPH radical by the extracts was lower for the leaf extract (0.79 mg/mL) compared to the root extract (1.15 mg/mL). The leaf extract significantly (p&amp;lt;0.01) decreased systolic and diastolic blood pressures in both rat models. &lt;strong&gt;Conclusion: &lt;/strong&gt;The extracts of &lt;em&gt;Omsteospermum imbricatu&lt;/em&gt; have moderate antioxidants and antihypertensive properties.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><work-type><style face="normal" font="default" size="100%">Research Article</style></work-type><section><style face="normal" font="default" size="100%">744</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Charlotte Mungho Tata&lt;sup&gt;1&lt;/sup&gt;, Constance Rufaro Sewani- Rusike&lt;sup&gt;1&lt;/sup&gt;, Olukayode Aremu&lt;sup&gt;1&lt;/sup&gt;, Opeoluwa Oyehan Oyedeji&lt;sup&gt;2&lt;/sup&gt;, Benedicta Ngwenchi Nkeh- Chungag&lt;sup&gt;3,&lt;/sup&gt;*&lt;/strong&gt;&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Department of Human Biology, Faculty of Health Sciences, Walter Sisulu University, Mthatha 5117, SOUTH AFRICA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Department of Chemistry, Faculty of Science and Agriculture, University of Fort Hare, PBX1314 Alice, 5700 Eastern Cape Province, SOUTH AFRICA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;3&lt;/sup&gt;Department of Biological and Environmental Sciences, Faculty of Natural Sciences, Walter Sisulu University, Mthatha 5117, SOUTH AFRICA.&lt;/p&gt;
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