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Adam M, Elhassan GOM, Yagi S, Senol FS, Orhan IE, Ahmed AA, Efferth T. In Vitro Antioxidant and Cytotoxic Activities of 18 Plants from the Erkowit Region, Eastern Sudan. NATURAL PRODUCTS AND BIOPROSPECTING 2018; 8:97-105. [PMID: 29453613 PMCID: PMC5913048 DOI: 10.1007/s13659-018-0155-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 02/09/2018] [Indexed: 05/15/2023]
Abstract
We investigated the antioxidant potential and cytotoxicity towards human CCRF-CEM leukemia cells of 57 extracts obtained from 18 plants collected in the Erkowit region, eastern Sudan. The antioxidant activity was determined by measuring the radical scavenging effects against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and N,N-dimethyl-p-phenylendiamine (DMPD), metal-chelation capacity, ferric-reducing (FRAP) and phosphomolibdenum-reducing antioxidant power (PRAP) methods using ELISA microtiter assays. Total phenol and flavonoid amounts of the extracts were determined spectrophotometrically. Cytotoxicity towards CCRF-CEM cells was evaluated by the resazurin reduction assay. Geranium favosum followed by Kalanchoe glaucescens, Malva parviflora, Aizoon canariense, and Coleus barbatus, respectively, possessed the highest antioxidant activity among the studied plants. Chrozophora oblongifolia and K. glaucescens exerted considerable cytotoxicity against CCRF-CEM leukemia cells. These plants may serve as source for the further development of natural antioxidant and antitumor agents.
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Affiliation(s)
- Manar Adam
- Department of Botany, Faculty of Science, University of Khartoum, Khartoum, Sudan
| | - Gihan O M Elhassan
- Department of Botany, Faculty of Science, University of Khartoum, Khartoum, Sudan
| | - Sakina Yagi
- Department of Botany, Faculty of Science, University of Khartoum, Khartoum, Sudan
| | - Fatma Sezer Senol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330, Ankara, Turkey
| | - Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330, Ankara, Turkey
| | - Abdel Azim Ahmed
- Department of Botany, Faculty of Science, University of Khartoum, Khartoum, Sudan
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Johannes Gutenberg University, 55128, Mainz, Germany.
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Ivanov M, Vajic UJ, Mihailovic-Stanojevic N, Miloradovic Z, Jovovic D, Grujic-Milanovic J, Karanovic D, Dekanski D. Highly potent antioxidant Olea europaea L. leaf extract affects carotid and renal haemodynamics in experimental hypertension: The role of oleuropein. EXCLI JOURNAL 2018; 17:29-44. [PMID: 29383017 PMCID: PMC5780626 DOI: 10.17179/excli2017-1002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 12/18/2017] [Indexed: 12/14/2022]
Abstract
Haemodynamic alterations in carotid and renal arteries are associated with the severity of target organ damage in patients with hypertension. Dietary habits, such as the Mediterranean diet, regulate blood pressure and oxidative stress, thus reduce the mortality rate due to cardiovascular diseases. In this study, our aim was to evaluate the reducing activity, antioxidant capacity and metal chelating ability of standardized Olea europaea L. leaf extract (OLE), and to test its (5, 25, 50 mg/kg) acute in vivo effects, as well as oleuropein's (OP, 10 mg/kg) on oxidative stress, carotid, renal and systemic haemodynamic parameters (blood pressure, heart rate, cardiac output, peripheral resistance) in spontaneously hypertensive rats (SHR). OLE has a higher antioxidative capacity than BHT, higher reducing ability than vitamin C, and 23 times lower capacity for metal ion chelation than EDTA. All three doses of OLE, and OP, improved oxidative stress in SHR. OLE5 improved carotid and renal haemodynamics, without significant effects on systemic haemodynamics. Two different mechanisms of antihypertensive responses to OLE were observed, OLE25 was most effective in reducing cardiovascular risks by improving systemic and regional (carotid and renal) haemodynamics, peripheral and regional vascular resistance. OLE50 causes the improvement of blood pressure and cardiac performances, but tends to retain elevated vascular resistance, therefore, reducing the inflow of blood into the brain and kidneys of the SHR. The OP did not alter systemic or regional haemodynamics, suggesting others constituents responsible for changes of cardiac function, as well as carotid and renal haemodynamics in response to OLE50.
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Affiliation(s)
- Milan Ivanov
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Dr Subotića 4, P. O. Box 102, Belgrade, Serbia
| | - Una-Jovana Vajic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Dr Subotića 4, P. O. Box 102, Belgrade, Serbia
| | - Nevena Mihailovic-Stanojevic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Dr Subotića 4, P. O. Box 102, Belgrade, Serbia
| | - Zoran Miloradovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Dr Subotića 4, P. O. Box 102, Belgrade, Serbia
| | - Djurdjica Jovovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Dr Subotića 4, P. O. Box 102, Belgrade, Serbia
| | - Jelica Grujic-Milanovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Dr Subotića 4, P. O. Box 102, Belgrade, Serbia
| | - Danijela Karanovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Dr Subotića 4, P. O. Box 102, Belgrade, Serbia
| | - Dragana Dekanski
- Biomedical Research, R & D Institute, Galenika a.d., Pasterova 2, Belgrade, Serbia
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Suchal K, Malik S, Khan SI, Malhotra RK, Goyal SN, Bhatia J, Ojha S, Arya DS. Molecular Pathways Involved in the Amelioration of Myocardial Injury in Diabetic Rats by Kaempferol. Int J Mol Sci 2017; 18:ijms18051001. [PMID: 28505121 PMCID: PMC5454914 DOI: 10.3390/ijms18051001] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 04/24/2017] [Accepted: 05/02/2017] [Indexed: 12/16/2022] Open
Abstract
There is growing evidence that chronic hyperglycemia leads to the formation of advanced glycation end products (AGEs) which exerts its effect via interaction with the receptor for advanced glycation end products (RAGE). AGE-RAGE activation results in oxidative stress and inflammation. It is well known that this mechanism is involved in the pathogenesis of cardiovascular disease in diabetes. Kaempferol, a dietary flavonoid, is known to possess antioxidant, anti-apoptotic, and anti-inflammatory activities. However, little is known about the effect of kaempferol on myocardial ischemia-reperfusion (IR) injury in diabetic rats. Diabetes was induced in male albino Wistar rats using streptozotocin (70 mg/kg; i.p.), and rats with glucose level >250 mg/dL were considered as diabetic. Diabetic rats were treated with vehicle (2 mL/kg; i.p.) and kaempferol (20 mg/kg; i.p.) daily for a period of 28 days and on the 28th day, ischemia was produced by one-stage ligation of the left anterior descending coronary artery for 45 min followed by reperfusion for 60 min. After completion of surgery, rats were sacrificed and the heart tissue was processed for biochemical, morphological, and molecular studies. Kaempferol pretreatment significantly reduced hyperglycemia, maintained hemodynamic function, suppressed AGE-RAGE axis activation, normalized oxidative stress, and preserved morphological alterations. In addition, there was decreased level of inflammatory markers (tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and NF-κB), inhibition of active c-Jun N-terminal kinase (JNK) and p38 proteins, and activation of Extracellular signal regulated kinase 1/2 (ERK1/2) a prosurvival kinase. Furthermore, it also attenuated apoptosis by reducing the expression of pro-apoptotic proteins (Bax and Caspase-3), Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) positive cells, and increasing the level of anti-apoptotic protein (Bcl-2). In conclusion, kaempferol attenuated myocardial ischemia-reperfusion injury in diabetic rats by reducing AGE-RAGE/ mitogen activated protein kinase (MAPK) induced oxidative stress and inflammation.
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Affiliation(s)
- Kapil Suchal
- Cardiovascular Research Laboratory, Department of Pharmacology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Salma Malik
- Cardiovascular Research Laboratory, Department of Pharmacology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Sana Irfan Khan
- Cardiovascular Research Laboratory, Department of Pharmacology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Rajiv Kumar Malhotra
- Cardiovascular Research Laboratory, Department of Pharmacology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Sameer N Goyal
- Department of Pharmacology, R.C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Maharashtra 425405, India.
| | - Jagriti Bhatia
- Cardiovascular Research Laboratory, Department of Pharmacology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Shreesh Ojha
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi 17666, UAE.
| | - Dharamvir Singh Arya
- Cardiovascular Research Laboratory, Department of Pharmacology, All India Institute of Medical Sciences, New Delhi 110029, India.
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Beber AP, de Souza P, Boeing T, Somensi LB, Mariano LNB, Cury BJ, Burci LM, da Silva CB, Simionatto E, de Andrade SF, da Silva LM. Constituents of leaves from Bauhinia curvula Benth. exert gastroprotective activity in rodents: role of quercitrin and kaempferol. Inflammopharmacology 2017; 26:539-550. [PMID: 28176198 DOI: 10.1007/s10787-017-0313-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 01/21/2017] [Indexed: 12/29/2022]
Abstract
The Bauhinia genus is known as "Pata-de-Vaca" and a wide variety of these species are used in Brazilian folk medicine due to their gastroprotective properties. This study aimed to investigate the antiulcer efficacy of the hydroalcoholic extract from B. curvula (HEBC) leaves, as well as its semi-purified fraction (SPFr) and the contribution of their phytochemicals constituents for this effect. For that, ethanol 60%/HCl 0.3 M- and indomethacin-induced gastric ulcer were performed in rodents. Gastric ulcerated tissues were processed for histological, histochemical and biochemical analysis. The oral treatment with HEBC and SPFr decreased the gastric ulcer induced by ethanol/HCl in mice and by indomethacin (only HEBC) in rats. The gastroprotective effect of HEBC was abolished in mice pretreated with Nω-Nitro-L-arginine methyl ester, N-Ethylmaleimide, glibenclamide or indomethacin. Both HEBC and SPFr reduced myeloperoxidase activity in parallel with a decrease of lipoperoxides content at the site of the lesion. On the other hand, HEBC did not alter volume, pH, total acidity or pepsin activity of acid gastric secretion in rats, and neither inhibited the in vitro H(+),K(+)-ATPase activity. Additionally, the compounds identified and isolated from the SPFr, the flavonoids quercitrin (65%) and kaempferol (35%), were able to diminish the extent of ulcerated area induced by both ethanol/HCl and indomethacin. Taking together, these findings show that B. curvula extracts present gastroprotective effect, mainly explained by the presence of flavonoids quercitrin and kaempferol, which may possibly improve the defensive factors of gastric mucosa.
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Affiliation(s)
- Ana Paula Beber
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil
| | - Priscila de Souza
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil.
| | - Thaise Boeing
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil
| | - Lincon Bordignon Somensi
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil
| | - Luísa Nathália Bolda Mariano
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil
| | - Benhur Judah Cury
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil
| | - Ligia Moura Burci
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Estadual do Paraná, Curitiba, Brazil
| | | | - Euclésio Simionatto
- Programa de Pós-Graduação em Química, Universidade Estadual do Mato Grosso do Sul, Campo Grande, Brazil
| | - Sérgio Faloni de Andrade
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil
| | - Luísa Mota da Silva
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, 458, 88302-901, Itajaí, SC, Brazil
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