Antihypertensive effect of Dialium guineense Wild. and Trema orientalis L. in L-NAME-induced hypertensive rats

Abstract

Dialium guineense (Caesalpiniaceae) and Trema orientalis (Celtidaceae) are traditionally used to treat and manage many diseases such as hypertension, headache and diabetes. Despite their recognized efficacy in traditional medicine, their antihypertensive properties are not yet effective. Therefore, the current study aimed to investigate the antihypertensive effect of ethanolic extracts of Dialium guineense and Trema orientalis on L-NAME-induced hypertensive rats. The systolic, diastolic and mean arterial pressure were recorded using CODA™ non-invasive blood pressure system. The phenolic compounds were also quantified using High Pressure Liquid Chromatography. Ethanolic extracts of both plants induced significant decrease of mean arterial pressure. At 500 mg/kg bw, both plants decreased mean arterial pressure from 126.4 ± 0.48 to 90.6 ± 3.12 mmHg and from 154.8 ± 7.84 to 103 ± 5.6 mmHg respectively for Dialium guineense and Trema orientalis. Losartan and Captopril, used as standard drugs at 100 mg/kg body weight, also significantly decrease blood pressure. Trema orientalis was the most active with a blood pressure reduction percentage of 33.46 ± 3.06 % comparable to Losartan (31.37 ± 3.13 %) and Captopril (31.76 ± 2.63 %). The probable bioctives compound identified were chlorogenic, gallic, caffeic, ellargic, tannic acids, and luteolin, isorhamnetin and chrysin.

Synthesis, Characterization, and Biological Evaluation of Cu(II) Complexes Containing Triflupromazine with Glycine and Histidine

“…Butylated hydroxytoluene (BHT) was used as a reference standard. The percentage of complexes that scavenge H 2 O 2 radicals was estimated using the following Equation [54] 5: $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm H}{_{2}}{\rm O}{_{2}}\ {\rm radical}\ {\rm scavenging}\ {\rm percentage}=\hfill\cr [({\rm A}{_{{\rm blank}}}-{\rm A}{_{{\rm sample}}})/\ {\rm A}{_{{\rm blank}}}]\times 100\hfill\cr}}$$$ …”

“…[53] The reference standard was ascorbic acid. The percentage of complexes that scavenge H 2 O 2 radicals was estimated using the following Equation [54] (5):…”

Trema orientale (L.) Blume: A review of its taxonomy, traditional uses, phytochemistry, pharmacological activities and domestication potential

“…The animals were monitored for four weeks during the treatment period and the blood pressure (BP) of the experimental animals was recorded by the use of a non-invasive BP system. At 500 mg/kg body weight (bw), T. orientale reduced mean arterial pressure from 154.8 ± 7.84 to 103 ± 5.6 mmHg [ 69 ]. Likewise, it is indicated that T. orientale is a potential antihyperlipidemic agent, reducing the risks of cardiovascular diseases.…”

Comparative Screening of Phytochemicals and Bioactive Compounds of Trema orientalis (Linn. Blume) Leaf and Bark Extracts

“…Steroids have been reported to have antibacterial properties also implicated in compounds as sex hormones and Cardiac glycosides are important class of naturally occurring drugs whose actions helps in the treatment of congestive heart failure [20,21].…”