@article {479, title = {Kolaviron, Biflavonoid Complex from the Seed of Garcinia kola Attenuated Angiotensin II- and Lypopolysaccharide-induced Vascular Smooth Muscle Cell Proliferation and Nitric Oxide Production}, journal = {Pharmacognosy Research}, volume = {8}, year = {2018}, month = {March 2016}, pages = {50-55}, type = {Original Article}, chapter = {50}, abstract = {

Introduction: Kolaviron (KV), a biflavonoid extract from Garcinia kola seeds has been reported to possess anti-inflammatory, anti-oxidant, hepato-protective, cardio-protective, nephro-protective and other arrays of chemopreventive capabilities but the mechanism of action is still not completely understood. Materials and Methods: In this study, we investigated the anti-proliferative, anti-inflammatory and anti-oxidative potential of KV in cultured Vascular Smooth Muscle Cells (VSMCs). Effects of KV (25-100 μg/mL) on VSMC proliferation alone or following treatments with mitogen and proinflammatory agents Angiotensin II (Ag II, 10-6 M) and lipopolysaccharide (LPS, 100 μg/mL) and effects on NO production were determined. Cellular proliferations were determined by MTT assay, nitric oxide (NO) level was determined by Griess assay. KV dose-and time dependently attenuated VSMC growth. Results: Treatment of VSMCs with Ag II and LPS significantly enhanced proliferation of the cell which was significantly attenuated by the treatment with KV. Treatment of VSMC with LPS significantly increased nitric oxide (NO) level in the media which was attenuated by KV. These results demonstrated anti-proliferative antiinflammatory properties of KV as it clearly inhibited cellular proliferation induced by mitogens as well as LPS-induced inflammatory processes. Conclusion: Therefore, KV may mitigate cardiovascular conditions that involve cell proliferation, free radical generation and inflammatory processes such as hypertension, diabetes and stroke. However, the molecular mechanism of action of KV needs to be investigated.

}, keywords = {Angiotensin II, Cardiovascular diseases, cell proliferation, Kolaviron, lipopolysaccharide, Nitric oxide, vascular smooth muscle cells}, doi = {10.4103/0974-8490.178647}, author = {Ademola Adetokunbo Oyagbemi and Temidayo Olutayo Omobowale and Adeolu Alex Adedapo and Momoh Audu Yakubu} } @article {622, title = {The Effects of Unripe Grape Extract on Systemic Blood Pressure, Nnitric Oxide Production, and Response to Angiotensin II Administration}, journal = {Pharmacognosy Research}, volume = {5}, year = {2013}, month = {April 2013}, pages = { 60-64}, type = {Original Article }, chapter = {60}, abstract = {

Background:\ Hypertension is the most common disease in the world. In Iranian folk medicine, unripe grape juice has been used as antihypertention remedy, but no data is documented for this popular belief. This study was designed to determine the effect of unripe grape extract (UGE) on blood pressure and the response to angiotensin II in rat.\ Materials and Methods:\ Unripe grape was collected, air dried, and extracted and concentrated. Four groups of Wistar rats received single doses of 125, 250, and 500 mg/kg of UGE or saline, respectively. The direct blood pressure and the serum nitrite level were measured one hour post UGE administration. The animals also were subjected to the infusion of various angiotensin II concentrations (100, 300, and 1000 μg/kg/min), and blood pressure was determined.\ Results:\ Mean arterial, systolic, and diastolic pressures (MAP, SP, and DP) in all UGE treated groups were less than the control group, but only at the dose of 125 mg/kg (Group 1) they were significantly different (\ P\ \< 0.05). The level of nitrite in groups 1-3 were significantly greater than the control group (\ P\ \< 0.05). No significant differences were detected for the MAP, SP, and DP to different concentrations of angiotensin II among these groups.\ Conclusion:\ UGE potentially attenuate MAP, SP, and DP via vasodilatation induced by nitric oxide production.

}, keywords = {Angiotensin II, Blood Pressure, Nitric oxide, Unripe Grape Extract, VitisVinifera}, doi = {10.4103/0974-8490.110511}, author = {Mehdi Nematbakhsh and Behzad Zolfaghari and Fatemeh Eshraghi and Tahereh Safari and Zahra Pezeshki and Seyyed Mohammad-Ali Sorooshzadeh} }