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Olive leaf extract

F Keirandish, N Mosaffa, M J Tarahi, Sh Fallahi
This study aimed to identify the effects of olive leaf extract (OLE) on IFNγ, TNFα, TGFβ, and nitric oxide (NO) resulted from macrophages infected with Leishmania major (L. major) amastigotes in the culture medium. High-performance liquid chromatography (HPLC) was used to analyze the level of Oleuropein in plant extract. To evaluate the immunomodulatory effects of OLE, the isolated BALB/c mice peritoneal macrophages were infected with L. major promastigotes and treated with 6.25, 12.5, and 25μg/mL concentrations of OLE...
February 16, 2018: Parasite Immunology
Marta Anna Szychlinska, Paola Castrogiovanni, Francesca Maria Trovato, Houda Nsir, Mokhtar Zarrouk, Debora Lo Furno, Michelino Di Rosa, Rosa Imbesi, Giuseppe Musumeci
PURPOSE: Osteoarthitis (OA) leads to progressive loss of articular cartilage, pain and joint disability. An acute injury constitutes an important risk factor for early OA, determining an inflammatory process responsible of cartilage degeneration and muscle atrophy, due to the joint pain and immobility. The study aims to assess the effects of conjugation of physical activity and diet enriched by olive tree compounds [extra virgin olive oil (EVOO) and olive leaf extract (OLE)], on the musculoskeletal system in OA rat model...
February 15, 2018: European Journal of Nutrition
Min Liu, Qiang Yong, Shiyuan Yu
Hydroxytyrosol (HT), a powerful antioxidant, clears free radicals and exhibits many biological activities. Because contents of HT are low in natural sources, bioconversion of oleuropein (OLE) to HT is of increasing interest. A biotechnological process was investigated to produce HT from OLE presented in olive leaf extract. Enzymatic hydrolysis using two cellulases with high BG activity, Novozymes CTec2 and commercial cellulase KDN (Qingdao, China), was carried out at 50 °C for 12 h followed by raising the temperature to 90 °C for chemical hydrolysis...
February 10, 2018: Biotechnology and Applied Biochemistry
Yuyu Xu, Lixing Wu, Aochang Chen, Chaoqi Xu, Qing Feng
Many studies reported that air pollution particulate matter (PM) exposure was associated with myocardial infarction (MI). Acrolein representing the unsaturated aldehydes, the main component of PM, derives from the incomplete combustion of wood, plastic, fossil fuels and the main constitute of cigarette smoking. However, the effect of acrolein on MI remains not that clear. In the current study, the effect of acrolein-exacerbated MI was investigated. In vivo, male Sprague-Dawley rats received olive leaf extract (OLE) followed by acrolein, then isoprenaline (ISO) was received by subcutaneous injection to induce MI...
February 7, 2018: International Journal of Molecular Sciences
Mustafa Cittan, Ali Çelik
A simple method was validated for the analysis of 31 phenolic compounds using liquid chromatography-electrospray tandem mass spectrometry. Proposed method was successfully applied to the determination of phenolic compounds in an olive leaf extract and 24 compounds were analyzed quantitatively. Olive biophenols were extracted from olive leaves by using microwave-assisted extraction with acceptable recovery values between 78.1 and 108.7%. Good linearities were obtained with correlation coefficients over 0.9916 from calibration curves of the phenolic compounds...
January 24, 2018: Journal of Chromatographic Science
Antonios Chrysargyris, Omiros Antoniou, Andreas Tzionis, Munoo Prasad, Nikolaos Tzortzakis
Peat-based growing media are not ecologically sustainable and peat extraction threatens sensitive peatland ecosystem. In this study, olive-stone waste (OSW) and paper waste (PW) were used in different ratios-as growing media-for ornamental crop production, as peat (P) substitutes. Marigold (Calendula officinalis L.), petunia (Petunia x hybrita L.) and matthiola (Matthiola incana L.) plants were grown in (1) P (100%), (2) P:OSW (90%:10%), (3) P:OSW (70%:30%), and (4) P:OSW:PW (60%:20%:20%). The physicochemical properties of these substrates and the effects on plant growth were determined...
January 18, 2018: Environmental Science and Pollution Research International
Hassan A Elgebaly, Nermeen M Mosa, Mariam Allach, Khaled F El-Massry, Ahmed H El-Ghorab, Amir M Al Hroob, Ayman M Mahmoud
Olive oil and leaf extract have several health benefits; however, their beneficial effect against fluoxetine-induced liver injury has not been investigated. The present study aimed to scrutinize the impact of fluoxetine on the liver of rats and to evaluate the protective effects of olive oil and leaf extract. Rats received fluoxetine orally at dose of 10 mg/kg body weight for 7 consecutive days. The fluoxetine-induced rats were concurrently treated with olive oil or leaf extract. At the end of the experiment, blood and liver samples were collected for analysis...
December 23, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Ismail Ishola, Charles Anunobi, Kayode Yemitan, Olasunmbo Afolayan, Tobi Durojaiye
OBJECTIVE: This study sought to evaluate the protective effect of ethanolic leaf extract of Moringa Oleifera (M. oleifera ) on testosterone-induced benign prostatic hyperplasia (BPH) in male Sprague-Dawley rats. MATERIALS AND METHODS: BPH was induced in rats by administration of testosterone propionate (3 mg/kg, s.c., in olive oil) for 4 weeks. M. oleifera (50, 100 or 200 mg/kg), celecoxib (20 mg/kg) or M. oleifera (50 mg/kg) + celecoxib (20 mg/kg) were orally administered daily 15 min before testosterone...
December 17, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
Azadeh Hamedi, Seyed Mahmoud Moheimani, Amirhossein Sakhteman, Hamed Etemadfard, Mahmoodreza Moein
Hydrosol beverages in Persian nutrition culture and ethnomedicine are the side products of essential oil industry that are used as delicious drinks or safe remedies. To investigate indications and chemical composition of hydrosol beverages for hyperlipidemia and cardiovascular conditions, Fars province was selected as the field of study. Ethnomedical data were gathered by questionnaires. The constituents of hydrosols were extracted with liquid/liquid extraction and analyzed by gas chromatography-mass spectrometry...
October 2017: Journal of Evidence-based Complementary & Alternative Medicine
Olorunfemi R Molehin, Omotade I Oloyede, Kehinde A Idowu, Anne A Adeyanju, Ayorinde O Olowoyeye, Olusegun I Tubi, Olayemi E Komolafe, Aanuoluwapo S Gold
Currently, there is increasing attention towards flavonoids and phenolic compounds of plant origin because of their association with decrease in the incidence of cardiovascular diseases and different types of cancer. The present study investigates the protective effect of Clerodendrum volubile (C. volubile) methanolic extracts against carbon tetrachloride (CCl4 )-induced hepatotoxicity in rats. Control rats (group I) received olive oil (1 mL/kg, i.p.), group II received CCl4 in olive oil (1 ml/kg, i.p.) to induce hepatotoxicity, groups III, IV and V were pretreated with leaf extract of C...
December 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Amith Kumar, Reshma Kumarchandra, Rajalakshmi Rai, Ganesh Sanjeev
The present study was undertaken to evaluate the anti-inflammatory activity and antigenotoxic effect of hydroalcoholic leaf extract of Persea americana ( P. americana ) in albino Wistar rats against whole body X-ray irradiation. Rats were orally administered with (25, 50, 100, 200, and 400 mg/kg body weight) of P. americana leaf extract for five days. On the fifth day after last administration, animals were exposed to whole body X-rays of 8 Gy. Based on Kaplan Meier's survival analysis, 100 mg/kg body weight was selected as an optimum dose for radioprotection...
December 2017: Research in Pharmaceutical Sciences
Ines Sifaoui, Atteneri López-Arencibia, Carmen M Martín-Navarro, María Reyes-Batlle, Mondher Mejri, Basilio Valladares, Jacob Lorenzo-Morales, Manef Abderabba, José Enrique Piñero
Leishmaniasis represents a serious threat to the health as one of the most important neglected tropical diseases as designated by the World Health Organization. The disease is endemic in 82 countries, among them Tunisia is an indigenous area for cutaneous Leishmaniasis. In a previous work, two tritepenic acids namely oleanolic and maslinic acids have been isolated from olive leaf extract. In the present paper, the in vitro activity against amastigotes stage of Leishmania (L.) infantum and Leishmania (L.) amazonensis was investigated...
2017: Iranian Journal of Pharmaceutical Research: IJPR
Thea Magrone, Anna Spagnoletta, Rosaria Salvatore, Manrico Magrone, Francesco Dentamaro, Matteo A Russo, Graziana Difonzo, Carmine Summo, Francesco Caponio, Emilio Jirillo
BACKGROUND: Olive tree leaves have been used in the Mediterranean area as traditional medicine in virtue of their healthy effects. Olive leaf extracts (OLEs) contain higher amounts of polyphenols than those detected in the extra virgin olive oil and fruit. Several lines of evidence support the cardioprotective, anti-oxidant and anti-inflammatory activities exerted by OLEs. METHODS: Peripheral blood mononuclear cells from twenty-five healthy donors were cultured in the presence of 3 µg of two OLE extracts, extract A (resuspended in water) and extract B (resuspended in 70% ethanol)...
2018: Endocrine, Metabolic & Immune Disorders Drug Targets
Syed Haris Omar, Philip G Kerr, Christopher J Scott, Adam S Hamlin, Hassan K Obied
Plant biophenols have been shown to be effective in the modulation of Alzheimer's disease (AD) pathology resulting from free radical-induced oxidative stress and imbalance of the redox chemistry of transition metal ions (e.g., iron and copper). On the basis of earlier reported pharmacological activities, olive biophenols would also be expected to have anti-Alzheimer's activity. In the present study, the antioxidant activity of individual olive biophenols (viz. caffeic acid, hydroxytyrosol, oleuropein, verbascoside, quercetin, rutin and luteolin) were evaluated using superoxide radical scavenging activity (SOR), hydrogen peroxide (H₂O₂) scavenging activity, and ferric reducing ability of plasma (FRAP) assays...
October 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Khaled Qabaha, Fuad Al-Rimawi, Ahmad Qasem, Saleh A Naser
Olive leaves are rich in polyphenolic compounds that are known to have antioxidant, antimicrobial, and anti-inflammatory activities. Therefore, olive leaf extract (OLE) is considered as a natural supplement. In this study we evaluated the antibacterial and the anti-inflammatory effect of OLE and its individual phenolic components in vitro. Polymorphonuclear cells (PMNCs) were isolated from the whole blood using Histopaque solution and cultured in RPMI-enriched medium. Tumor necrosis factor α (TNFα) level was determined by ELISA after 24 h of lipopolysaccharide stimulation...
November 3, 2017: Journal of Medicinal Food
Hui Chen, Yan Jiang, Zhanwei Yang, Wenbing Hu, Lei Xiong, Ning Wang, Xin Liu, Guodong Zheng, Kehui Ouyang, Wenjun Wang
The paper investigated the antihyperglycemic and antihyperlipidemic efficacy and antioxidant capacity of Chimonanthus nitens Oliv. leaf extract (COE) in combination of high-glucose-fat diet-fed and streptozotocin-induced diabetic model mice. Various physiological indexes in diabetic model mice were well improved especially by oral administration of high dose of COE; the results were listed as follows. Fast blood glucose (FBG) level and serum triglyceride (TC), total cholesterol (TG), low-density lipoprotein cholesterol (LDLC), and malondialdehyde (MDA) as well as MDA in liver were significantly reduced; fasting serum insulin (FINS) and insulin sensitivity index (ISI) were both increased; high-density lipoprotein cholesterol (HDLC) in serum was significantly increased; total antioxidant capacity (T-AOC), activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in serum and liver were apparently enhanced; liver coefficient (LC), liver transaminase, and alkaline phosphatase (ALP) were decreased...
2017: Oxidative Medicine and Cellular Longevity
Maryam Sarbishegi, Enam Alhagh Charkhat Gorgich, Ozra Khajavi, Gholamreza Komeili, Saeedeh Salimi
Parkinson's disease (PD) is an age-related disease in which dopaminergic neurons in the nigrostriatal pathway are destroyed, resulting in movement and behavioral problems. Oxidative stress and the generation of reactive oxygen species play key roles in neurodegenerative diseases, such as PD. Rotenone (ROT) is a common pesticide that induces oxidative stress. Olive leaves extract (OLE) has antioxidant and neuroprotective effects. Thus, the aim of this study was to investigate the neuroprotective effects of OLE on ROT-induced oxidative stress in the midbrain of a rat model of PD...
October 16, 2017: Metabolic Brain Disease
Jane Ogoamaka Okwuzu, Peter Odeiga, Olubunmi AdetoroOtubanjo, Oliver Chukwujekwu Ezechi
BACKGROUND: The unrefined nature of the herbal preparations from Vernonia amygdalina (VA) and toxicity potentials of Sniper may both have severe consequences on the biochemical and genetic systems. OBJECTIVES: To assess the microscopic and macroscopic effects of these substances. METHODS: VA leafs and Sniper were prepared and dissolved in distilled water to give different concentrations. Series of baseline tests were carried out to establish concentration range for root growth...
March 2017: African Health Sciences
Nicola Merola, Julián Castillo, Obdulio Benavente-García, Gaspar Ros, Gema Nieto
Citrus fruit and olive leaves are a source of bioactive compounds such as biophenols which have been shown to ameliorate obesity-related conditions through their anti-hyperlipidemic and anti-inflammatory effect, and by regulating lipoproteins and cholesterol body levels. Citrolive™ is a commercial extract which is obtained from the combination of both citrus fruit and olive leaf extracts; hence, it is hypothesised that Citrolive™ may moderate metabolic disorders that are related to obesity and their complications...
September 26, 2017: Nutrients
Alexandra Duprates Steiner, Alvaro Vargas, Nei Fronza, Adriano Brandelli, João Henrique Zimnoch Dos Santos
Natural extracts (anthocyanins, tannin, anatto, curcuma and olive leaf extracts) were encapsulated within a silica network by acid or base-catalyzed sol-gel methods. The nominal encapsulated contents were between 2.5 and 50wt.-%. The resulting materials were characterized by Fourier transform infrared spectroscopy, diffuse reflectance in the UV region, nitrogen adsorption/desorption porosimetry and small angle X-ray scattering. Encapsulated anthocyanin and tannin afforded inhibition zones between 9-21mm towards Staphylococcus aureus, Escherichia coli, Bacillus cereus, Candida sp...
December 1, 2017: Colloids and Surfaces. B, Biointerfaces
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