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Luteolin AND Diabetes

Seung Hwan Hwang, Shin Hwa Kwon, Set Byeol Kim, Soon Sung Lim
Stauntonia hexaphylla (Thunb.) Decne. (Lardizabalaceae) leaves (SHL) have been used traditionally as analgesics, sedatives, diuretics, and so on, in China. To date, no data have been reported on the inhibitory effect of SHL and its constituents on rat lens aldose reductase (RLAR) and advanced glycation end products (AGEs). Therefore, the inhibitory effect of compounds isolated from SHL extract on RLAR and AGEs was investigated to evaluate potential treatments of diabetic complications. The ethyl acetate (EtOAC) fraction of SHL extract showed strong inhibitory activity on RLAR and AGEs; therefore, EtOAc fraction (3...
2017: BioMed Research International
Emmanuel A Irondi, Jacob K Akintunde, Samson O Agboola, Aline A Boligon, Margareth L Athayde
Adansonia digitata (A. digitata) leaves serve as food and has several medicinal uses in many parts of the world. This study evaluated the influence of blanching on the phenolics composition, antioxidant activity, and inhibitory effect of methanol extract of A. digitata leaves on the activities of some key enzymes (α-amylase, α-glucosidase, and aldose reductase) implicated in type 2 diabetes (T2D) in vitro. Reverse-phase HPLC analysis revealed that the leaves had appreciable levels of flavonoids and phenolic acids, including catechin, epicatechin, rutin, quercitrin, quercetin, kaempferol, and luteolin (flavonoids); gallic, chlorogenic, caffeic, and ellagic acids (phenolic acids)...
March 2017: Food Science & Nutrition
Hui Chen, Kehui Ouyang, Yan Jiang, Zhanwei Yang, Wenbing Hu, Lei Xiong, Ning Wang, Xin Liu, Wenjun Wang
The ethanol extracts of Chimonanthus nitens Oliv. leaves were prepared sequentially by ethanol gradient elution and tested for their α-glucosidase inhibitory. The fraction of 50% ethanol eluate (EE) exhibited the notable inhibition with IC50 of 0.376mg/mL. Also, 50% EE was chemically characterized by liquid chromatography-mass spectrometry (LC-MS) analysis. Eight compounds including rutin (1), hyperin (2), isoquercitrin (3), luteoloside (4), astragalin (6), quercetin (13), naringenin (14), kaempferol (15) were identified by compared with standard substances as well as proper luteolin-5-O-glucoside (5), kaempferol-7-O-rhamnoside (9), 5,7,8-trihydroxy-2-methoxyl-flavone-7-O-glucoside (10), kaempferol-7-O-acetyl-galactoside (11)...
May 2017: International Journal of Biological Macromolecules
Set Byeol Kim, Seung Hwan Hwang, Hong-Won Suh, Soon Sung Lim
The aim of this study was to determine aldose reductase (AR) inhibitory activity and 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity of compounds from Agrimonia pilosa Ledeb (AP). We isolated agrimoniin (AM), four flavonoid glucosides and two flavonoid glucuronides from the n-butanol fraction of AP 50% methanol extract. In addition to isolated compounds, the AR-inhibitory activity and the DPPH free radical scavenging activity of catechin, 5-flavonoids, and 4-flavonoid glucosides (known components of AP) against rat lens AR (RLAR) and DPPH assay were measured...
February 10, 2017: International Journal of Molecular Sciences
Abdulwali Ablat, Mohammed Farouq Halabi, Jamaludin Mohamad, Muhammad Hafiz Husna Hasnan, Hazrina Hazni, Ser-Huy Teh, Jamil A Shilpi, Zulqarnain Mohamed, Khalijah Awang
BACKGROUND: Brucea javanica (B. javanica) seeds, also known as "Melada pahit" in Indo-Malay region are traditionally used to treat diabetes. The objective of this study was to determine antidiabetic, antioxidant and anti-inflammatory effects of B. javanica seeds on nicotinamide (NA)-streptozotocin (STZ) induced type 2 diabetic (T2D) rats and to analyze its chemical composition that correlate with their pharmacological activities. METHODS: A hydroethanolic extract of B...
February 6, 2017: BMC Complementary and Alternative Medicine
V P Veerapur, V Pratap, B S Thippeswamy, P Marietta, P Bansal, P V Kulkarni, V H Kulkarni
ETHNOPHARMACOLOGICAL RELEVANCE: Traditionally Cassia glauca (CG) has been used to treat diabetes. AIM OF THE STUDY: The study was undertaken to evaluate anti-diabetic and antioxidant activity of poly phenolic enriched extract of CG in standardized streptozotocin (STZ)-induced diabetic rats. MATERIALS AND METHODS: The effect of ethanol (CGE) and water (CGW) extracts of CG (200 and 400mg/kg) treatment were evaluated in STZ (50mg/kg, iv) induced diabetic rats...
January 18, 2017: Journal of Ethnopharmacology
Shuhei Hattori, Tetsuro Kamiya, Hirokazu Hara, Masayuki Ninomiya, Mamoru Koketsu, Tetsuo Adachi
Extracellular-superoxide dismutase (EC-SOD), one of the SOD isozymes, is negatively regulated under hypoxic conditions, and decreases in its expression may exacerbate vascular diseases. Moreover, epigenetics, such as DNA methylation and histone modifications, are known to play a critical role in the progression of cancer, type 2 diabetes, and atherosclerosis. We previously investigated the involvement of reactive oxygen species (ROS) and p38 mitogen-activated protein kinase (MAPK) in decreases in EC-SOD expression in hypoxic COS7 cells; however, the role of epigenetics in this process currently remains unknown...
2016: Biological & Pharmaceutical Bulletin
Nilüfer Orhan, Ülkü Gökçen İçöz, Levent Altun, Mustafa Aslan
OBJECTIVES: Bidens species are used for their antidiabetic properties traditionally in many countries. Aim of this study is to evaluate hypoglycaemic and antidiabetic activity of Bidens tripartita extract and to identify its active compounds through bioactivity guided isolation technique. MATERIALS AND METHODS: Hypoglycaemic effects of B. tripartita extract and its sub-extracts were investigated in normal and glucose-hyperglycaemic rats. Streptozotocin induced diabetic rats were used to examine antidiabetic activity of the extract and its sub-extracts after acute and sub-acute administration...
October 2016: Iranian Journal of Basic Medical Sciences
Chia-Chuan Chang, Wei Yuan, Hsiao-Yuh Roan, Jia-Ling Chang, Hsiu-Chen Huang, Yu-Ching Lee, Huey Jen Tsay, Hui-Kang Liu
BACKGROUND: In this study, we aimed to develop a Stigmata Maydis (corn silk) fraction with dual bio-activities against oxidative stress and protein glycation to protect β-cells from diabetes-induced failure. METHODS: Corn silk fractions were prepared by partition and chemically characterised by thin-layer chromatography. Free radical scavenging assay, glycation assay, and cell-based viability test (neutral red) were employed to decide the best fraction. Cell death analysis was executed by annexin V/ Propidium iodide staining...
November 3, 2016: BMC Complementary and Alternative Medicine
Geethi Pamunuwa, D Nedra Karunaratne, Viduranga Y Waisundara
This review discusses the antidiabetic activities of Scoparia dulcis as well as its antioxidant and anti-inflammatory properties in relation to the diabetes and its complications. Ethnomedical applications of the herb have been identified as treatment for jaundice, stomach problems, skin disease, fever, and kidney stones, reproductory issues, and piles. Evidence has been demonstrated through scientific studies as to the antidiabetic effects of crude extracts of S. dulcis as well as its bioactive constituents...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
Jomon Sebastian
Hyperglycaemia in diabetic patients causes diverse range of complications and the earliest among them is diabetic cataract. The role of aldose reductase, the key enzyme in polyol pathway, is well known in the genesis of cataract in chronic diabetic patients. Controlling of sorbitol flux into lens epithelial cells through aldose reductase inhibitors is an important treatment strategy. Due to the side-effects of many drugs so far developed, the development of aldose reductase inhibitors from natural sources has gained considerable attention...
June 30, 2016: Current Drug Discovery Technologies
Lei Zhang, Yi-Jing Han, Xian Zhang, Xin Wang, Bin Bao, Wei Qu, Jian Liu
AIMS/HYPOTHESIS: Inflammatory polarisation of adipose tissue macrophages (ATMs) plays a critical role in the development of obesity-associated metabolic diseases such as insulin resistance and diabetes. Our previous study indicated that dietary luteolin (LU) could prevent the establishment of insulin resistance in mice fed a high-fat diet (HFD). Here, we further investigated the effects of LU, which is a natural flavonoid, on pre-established insulin resistance and obesity-associated ATM polarisation in mice...
October 2016: Diabetologia
Eder Lana E Silva, Jonathas Felipe Revoredo Lobo, Joachim Møllesøe Vinther, Ricardo Moreira Borges, Dan Staerk
α-Glucosidase inhibitors decrease the cleavage- and absorption rate of monosaccharides from complex dietary carbohydrates, and represent therefore an important class of drugs for management of type 2 diabetes. In this study, a defatted ethyl acetate extract of Eremanthus crotonoides leaves with an inhibitory concentration (IC50) of 34.5 μg/mL towards α-glucosidase was investigated by high-resolution α-glucosidase inhibition profiling combined with HPLC-HRMS-SPE-NMR. This led to identification of six α-glucosidase inhibitors, namely quercetin (16), trans-tiliroside (17), luteolin (19), quercetin-3-methyl ether (20), 3,5-di-O-caffeoylquinic acid n-butyl ester (26) and 4,5-di-O-caffeoylquinic acid n-butyl ester (29)...
June 16, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Kwang Sik Suh, Suk Chon, Eun Mi Choi
Methylglyoxal (MG), a reactive sugar-derived metabolite, exerts harmful effects by inducing oxidative stress, which aggravates a series of diabetic complications, including osteoporosis. The present study was performed to examine the effects of luteolin, a dietary polyphenolic flavonoid, on MG-induced cytotoxicity in MC3T3-E1 osteoblastic cells. Pretreatment of MC3T3-E1 osteoblastic cells with luteolin prevented MG-induced cell death and production of tumor necrosis factor-alpha, intracellular reactive oxygen species, mitochondrial superoxide, and cardiolipin peroxidation...
December 2016: Cytotechnology
Lingyu Zhou, Tianyu Zhang, Bin Lu, Zengyang Yu, Xiyu Mei, Palida Abulizi, Lili Ji
ETHNOPHARMACOLOGICAL RELEVANCE: Lonicerae Japonicae Flos (Jin-Yin-Hua) is a well-known traditional Chinese medicine used for clearing away heat and toxic material. AIM OF THE STUDY: This study aims to observe the attenuation of aqueous extract of Lonicerae Japonicae Flos (FL) against streptozotocin (STZ)-induced diabetic retinopathy (DR) and its engaged mechanism. MATERIALS AND METHODS: STZ-induced proliferative DR (PDR) for 5 month in C57BL/6 mice was used in this study...
August 2, 2016: Journal of Ethnopharmacology
Yanqing Zang, Kiharu Igarashi, Yu Li
Anti-diabetic potential of luteolin (LU) and luteolin-7-O-glucoside (LUG) were investigated in the amount of equimolar on KK-A(y) mice. The results showed that both of LU and LUG significantly improved blood glucose, HbA1c, insulin, and HOMR-IR levels. Anti-inflammatory and anti-oxidative effects of the LU and LUG were also proved. Furthermore, TGs in serum and liver were significantly decreased in the LU and LUG groups, as well as the mRNA expression of fat acid expression-related genes (SREBP-1c), compared to the basal diet group (CON)...
August 2016: Bioscience, Biotechnology, and Biochemistry
Vera Francisco, Artur Figueirinha, Gustavo Costa, Joana Liberal, Isabel Ferreira, Maria C Lopes, Carmen García-Rodríguez, Maria T Cruz, Maria T Batista
Luteolin is a dietary flavonoid with medicinal properties including antioxidant, antimicrobial, anticancer, antiallergic, and anti-inflammatory. However, the effect of luteolin on liver X receptors (LXRs), oxysterol sensors that regulate cholesterol homeostasis, lipogenesis, and inflammation, has yet to be studied. To unveil the potential of luteolin as an LXRα/β modulator, we investigated by real-time RT-PCR the expression of LXR-target genes, namely, sterol regulatory element binding protein 1c (SREBP-1c) in hepatocytes and ATP-binding cassette transporter (ABC)A1 in macrophages...
May 27, 2016: Journal of Natural Products
Naser Abbasi, Afra Khosravi, Ali Aidy, Massoumeh Shafiei
BACKGROUND: Clinical evidence indicates the diabetes-induced impairment of osteogenesis caused by a decrease in osteoblast activity. Flavonoids can increase the differentiation and mineralization of osteoblasts in a high-glucose state. However, some flavonoids such as luteolin may have the potential to induce cytotoxicity in osteoblast-like cells. This study was performed to investigate whether a cytoprotective concentration range of luteolin could be separated from a cytotoxic concentration range in human MG-63 osteoblast-like cells in high-glucose condition...
March 2016: Iranian Journal of Medical Sciences
A M Popov, O N Krivoshapko, A A Klimovich, A A Artyukov
The review considers recent experimental studies of biological activity and mechanisms of therapeutic action of rosmarinic acid, luteolin and its sulfated derivatives in diseases associated with disorders of carbohydrate and lipid metabolism. Particular attention is focused on the results of studies showing a high therapeutic potential of these phenolic compounds in their prophylactic and therapeutic use at experimental modeling of type 2 diabetes and hyperlipidemia. Based on the analysis of our results and the literature data putative mechanisms of therapeutic action of rosmarinic acid, luteolin and its sulfated derivatives have been proposed...
January 2016: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
Guillermo Ramirez, Alejandro Zamilpa, Miguel Zavala, Julia Perez, Dulce Morales, Jaime Tortoriello
ETHNOPHARMACOLOGICAL RELEVANCE: Tecoma stans is traditionally used by several ethnical groups in Mexico and Central America to treat diabetes. This species is mentioned in the majority of the ethnopharmacological studies compiled in Mexico focused in medicinal plants used as anti-diabetic treatment. AIM OF THE STUDY: Recently, this plant was found to display a high level of pancreatic lipase inhibitory activity, in addition to the several action mechanisms already described...
June 5, 2016: Journal of Ethnopharmacology
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