1
|
Yang D, Lew HL, Mak YY, Ou SJL, Lim JA, Lu Y, Seah CLY, Tan MQH, Huang D, Tai ES, Liu MH. Incorporation of okra (Abelmoschus esculentus (L.) Moench) seed powder into fresh rice noodles with tapioca starch improves postprandial glycemia, insulinemia and satiety in healthy human volunteers. J Funct Foods 2023. [DOI: 10.1016/j.jff.2022.105382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
|
2
|
Intervention Effects of Okra Extract on Brain-Gut Peptides and Intestinal Microorganisms in Sleep Deprivation Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:9855411. [PMID: 36193125 PMCID: PMC9526647 DOI: 10.1155/2022/9855411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 08/13/2022] [Indexed: 11/18/2022]
Abstract
Objective Okra, possessing various bioactive components, is used to treat different diseases. This study sought to estimate the intervention effects of okra extract (OE) on brain-gut peptides (BGPs) and intestinal microorganisms in sleep deprivation (SD) rats. Methods SD rat models were established using the modified multiple platform method and then treated with normal saline, diazepam tablets, or different doses of OE. Body weight and average daily water consumption of rats were recorded. Depressive behaviors of rats were assessed by the open field test and sucrose preference test. Serum levels of noradrenaline, melatonin, inflammatory factors (IL-1β/IL-6/TNF-α/IL-4/IL-10), and BGP indexes, including gastrin (GAS), motilin (MTL), 5-hydroxytryptamine (5-HT), cholecystokinin (CCK), and vasoactive intestinal peptide (VIP) were measured by ELISA. Additionally, the DNA relative contents of representative intestinal microorganisms in the collected rat feces were determined using RT-qPCR. Results SD decreased body weight and average daily water consumption and induced depressive behaviors as well as stress and inflammatory responses in rats. SD rats exhibited lowered GAS, MTL, 5-HT, and VIP but elevated CCK and showed diminished DNA relative contents of Bacteroidetes and probiotics (Bifidobacteria and Lactobacilli) but increased Clostridium perfringens. OE at different doses ameliorated the depressive behaviors and mitigated the stress and inflammatory responses in SD rats, raised the serum contents of GAS, MTL, 5-HT, and VIP, reduced CCK level, elevated the DNA relative contents of Bacteroidetes and probiotics, but diminished Clostridium perfringens. OE exhibited similar intervention effects to diazepam tablets (positive control). Conclusion OE exerts intervention effects on BGPs and intestinal microorganisms in SD rats.
Collapse
|
3
|
Mechanism of viscosity reduction of okra pectic polysaccharide by ascorbic acid. Carbohydr Polym 2022; 284:119196. [DOI: 10.1016/j.carbpol.2022.119196] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/16/2022] [Accepted: 01/27/2022] [Indexed: 11/21/2022]
|
4
|
Saatchi A, Aghamohammadzadeh N, Beheshtirouy S, Javadzadeh Y, Afshar FH, Ghaffary S. Anti‐hyperglycemic effect of
Abelmoschus culentesus
(Okra) on patients with diabetes type 2: a randomized clinical trial. Phytother Res 2022; 36:1644-1651. [DOI: 10.1002/ptr.7341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 10/04/2021] [Accepted: 11/08/2021] [Indexed: 12/12/2022]
Affiliation(s)
- Ali Saatchi
- Drug Applied Research Center Tabriz University of Medical Sciences Tabriz Iran
- Faculty of Pharmacy Tabriz University of Medical Sciences Tabriz Iran
| | | | | | - Yousef Javadzadeh
- Drug Applied Research Center Tabriz University of Medical Sciences Tabriz Iran
| | - Fariba Heshmati Afshar
- Drug Applied Research Center Tabriz University of Medical Sciences Tabriz Iran
- Faculty of Pharmacy Tabriz University of Medical Sciences Tabriz Iran
| | - Saba Ghaffary
- Drug Applied Research Center Tabriz University of Medical Sciences Tabriz Iran
- Hematology and Oncology Research Center Tabriz University of Medical Sciences Tabriz Iran
| |
Collapse
|
5
|
Identification of α-Glucosidase Inhibitors from Leaf Extract of Pepper ( Capsicum spp.) through Metabolomic Analysis. Metabolites 2021; 11:metabo11100649. [PMID: 34677364 PMCID: PMC8538662 DOI: 10.3390/metabo11100649] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/15/2021] [Accepted: 09/18/2021] [Indexed: 12/11/2022] Open
Abstract
Metabolomics and in vitro α-glucosidase inhibitory (AGI) activities of pepper leaves were used to identify bioactive compounds and select genotypes for the management of type 2 diabetes mellitus (T2DM). Targeted metabolite analysis using UPLC-DAD-QToF-MS was employed and identified compounds that belong to flavone and hydroxycinnamic acid derivatives from extracts of pepper leaves. A total of 21 metabolites were detected from 155 samples and identified based on MS fragmentations, retention time, UV absorbance, and previous reports. Apigenin-O-(malonyl) hexoside, luteolin-O-(malonyl) hexoside, and chrysoeriol-O-(malonyl) hexoside were identified for the first time from pepper leaves. Pepper genotypes showed a huge variation in their inhibitory activity against α-glucosidase enzyme(AGE) ranging from 17% to 79%. Genotype GP38 with inhibitory activity of 79% was found to be more potent than the positive control acarbose (70.8%.). Orthogonal partial least square (OPLS) analyses were conducted for the prediction of the AGI activities of pepper leaves based on their metabolite composition. Compounds that contributed the most to the bioactivity prediction model (VIP >1.5), showed a strong inhibitory potency. Caffeoyl-putrescine was found to show a stronger inhibitory potency (IC50 = 145 µM) compared to acarbose (IC50 = 197 µM). The chemometric procedure combined with high-throughput AGI screening was effective in selecting polyphenols of pepper leaf for T2DM management.
Collapse
|
6
|
Reverse pharmacology of phytoconstituents of food and plant in the management of diabetes: Current status and perspectives. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2020.10.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
7
|
Celano R, Docimo T, Piccinelli AL, Gazzerro P, Tucci M, Di Sanzo R, Carabetta S, Campone L, Russo M, Rastrelli L. Onion Peel: Turning a Food Waste into a Resource. Antioxidants (Basel) 2021; 10:antiox10020304. [PMID: 33669451 PMCID: PMC7920456 DOI: 10.3390/antiox10020304] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 12/26/2022] Open
Abstract
Food waste is a serious problem for food processing industries, especially when it represents a loss of a valuable source of nutrients and phytochemicals. Increasing consumer demand for processed food poses the problem of minimizing waste by conversion into useful products. In this regard, onion (Allium cepa) waste consisting mainly of onion skin is rich in bioactive phenolic compounds. Here, we characterized the flavonoid profiles and biological activities of onion skin wastes of two traditional varieties with protected geographical indication (PGI), the red “Rossa di Tropea” and the coppery “Ramata di Montoro”, typically cultivated in a niche area in southern Italy. The phytochemical profiles of exhaustive extracts, characterized by ultra-high-performance liquid chromatography coupled with ultraviolet (UV) detection and high-resolution mass spectrometry, revealed that flavonols and anthocyanins were the characteristic metabolite classes of onion skins. Quercetin, quercetin glucosides and their dimer and trimer derivatives, and, among anthocyanins, cyanidin 3-glucoside, were the most abundant bioactive compounds. The potential of onion skins was evaluated by testing several biological activities: ABTS/oxygen radical absorbance capacity (ORAC) and in vitro alpha-glucosidase assays were performed to evaluate the antioxidant and anti-diabetic properties of the extracts and of their main compounds, respectively, and proliferative activity was evaluated by MTT assay on human fibroblasts. In the present study, by observing various biological properties of “Rossa di Tropea” and “Ramata di Montoro” onion-dried skins, we clearly indicated that this agricultural waste can provide bioactive molecules for multiple applications, from industrial to nutraceutical and cosmetical sectors.
Collapse
Affiliation(s)
- Rita Celano
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.C.); (P.G.); (L.R.)
| | - Teresa Docimo
- Institute of Bioscience and BioResources, National Research Council, Via Università 100, 80055 Portici, Italy; (T.D.); (M.T.)
| | - Anna Lisa Piccinelli
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.C.); (P.G.); (L.R.)
- Correspondence: (A.L.P.); (M.R.)
| | - Patrizia Gazzerro
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.C.); (P.G.); (L.R.)
| | - Marina Tucci
- Institute of Bioscience and BioResources, National Research Council, Via Università 100, 80055 Portici, Italy; (T.D.); (M.T.)
| | - Rosa Di Sanzo
- Department of Agriculture Science, Food Chemistry, Safety and Sensoromic Laboratory (FoCuSS Lab), University of Reggio Calabria, Via Salita Melissari, 89124 Reggio Calabria, Italy; (R.D.S.); (S.C.)
| | - Sonia Carabetta
- Department of Agriculture Science, Food Chemistry, Safety and Sensoromic Laboratory (FoCuSS Lab), University of Reggio Calabria, Via Salita Melissari, 89124 Reggio Calabria, Italy; (R.D.S.); (S.C.)
| | - Luca Campone
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126 Milan, Italy;
| | - Mariateresa Russo
- Department of Agriculture Science, Food Chemistry, Safety and Sensoromic Laboratory (FoCuSS Lab), University of Reggio Calabria, Via Salita Melissari, 89124 Reggio Calabria, Italy; (R.D.S.); (S.C.)
- Correspondence: (A.L.P.); (M.R.)
| | - Luca Rastrelli
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.C.); (P.G.); (L.R.)
| |
Collapse
|
8
|
Sultana R, Alashi AM, Islam K, Saifullah M, Haque CE, Aluko RE. Inhibitory Activities of Polyphenolic Extracts of Bangladeshi Vegetables against α-Amylase, α-Glucosidase, Pancreatic Lipase, Renin, and Angiotensin-Converting Enzyme. Foods 2020; 9:foods9070844. [PMID: 32610462 PMCID: PMC7404479 DOI: 10.3390/foods9070844] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/06/2020] [Accepted: 06/10/2020] [Indexed: 12/15/2022] Open
Abstract
The aim of the study was to determine the in vitro enzyme inhibition activities of aqueous polyphenolic extracts of nine popular Bangladeshi vegetables, namely ash gourd, bitter gourd, brinjal, Indian spinach, kangkong, okra, ridge gourd, snake gourd, and stem amaranth. Polyphenolic glycosides were the major compounds present in the extracts. Inhibition of α-amylase (up to 100% at 1 mg/mL) was stronger than α-glucosidase inhibition (up to 70.78% at 10 mg/mL). The Indian spinach extract was the strongest inhibitor of pancreatic lipase activity (IC50 = 276.77 µg/mL), which was significantly better than that of orlistat (381.16 µg/mL), a drug. Ash gourd (76.51%), brinjal (72.48%), and snake gourd (66.82%) extracts were the most effective inhibitors of angiotensin-converting enzyme (ACE), an enzyme whose excessive activities have been associated with hypertension. Brinjal also had a significantly higher renin-inhibitory activity than the other vegetable extracts. We conclude that the vegetable extracts may have the ability to reduce enzyme activities that have been associated with hyperglycemia, hyperlipidemia, and hypertension.
Collapse
Affiliation(s)
- Razia Sultana
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (R.S.); (A.M.A.)
| | - Adeola M. Alashi
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (R.S.); (A.M.A.)
| | - Khaleda Islam
- Institute of Nutrition and Food Sciences, University of Dhaka, Nilkhet Rd, Dhaka 1000, Bangladesh;
| | - Md Saifullah
- Natural Resources Management Division, Bangladesh Agricultural Research Council, Dhaka 1215, Bangladesh;
| | - C. Emdad Haque
- Natural Resources Institute, University of Manitoba, Winnipeg, MB R3T 2N2, Canada;
| | - Rotimi E. Aluko
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (R.S.); (A.M.A.)
- The Richardson Centre for Functional Foods and Nutraceuticals, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Correspondence: ; Tel.: +1-204-474-9555
| |
Collapse
|
9
|
Esmaeilzadeh D, Razavi BM, Hosseinzadeh H. Effect of Abelmoschus esculentus (okra) on metabolic syndrome: A review. Phytother Res 2020; 34:2192-2202. [PMID: 32222004 DOI: 10.1002/ptr.6679] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/29/2020] [Accepted: 03/12/2020] [Indexed: 01/01/2023]
Abstract
Metabolic syndrome is a disorder characterized by dyslipidemia, insulin resistance, abdominal fat, high blood pressure, hypertriglyceridemia, and diminished high density lipoprotein cholesterol. Okra (Abelmoschus esculentus L.), routinely called lady's finger, has belonged to the Malvaceae family. Okra is considered as a valuable crop due to the multiple functions of its leaves, buds, flowers, pods, stems, and seeds in traditional and modern medicines. Several bioactive components are presented in different parts of okra including polyphenolic compounds especially oligomeric catechins and flavonol derivatives such as quercetin. The antioxidant, anti-inflammatory, anticancer, immunomodulatory, gastroprotective, neuroprotective, lipid lowering, and antidiabetic effects of okra have been established. Although different in vivo and in vitro studies revealed that okra has an ability to overcome metabolic syndrome symptoms, the lack of clinical studies is notable. So, further clinical trials should be accomplished to confirm the role of okra in metabolic syndrome. The aims of this review are to gather different studies regarding the potential efficacy of okra in metabolic syndrome.
Collapse
Affiliation(s)
| | - Bibi Marjan Razavi
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Hosseinzadeh
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| |
Collapse
|
10
|
Assefa ST, Yang EY, Chae SY, Song M, Lee J, Cho MC, Jang S. Alpha Glucosidase Inhibitory Activities of Plants with Focus on Common Vegetables. PLANTS 2019; 9:plants9010002. [PMID: 31861279 PMCID: PMC7020213 DOI: 10.3390/plants9010002] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/12/2019] [Accepted: 12/16/2019] [Indexed: 01/07/2023]
Abstract
Type-2 diabetes mellitus is one of the most prevalent metabolic diseases in the world, and is characterized by hyperglycemia (i.e., high levels of glucose in the blood). Alpha-glucosidases are enzymes in the digestive tract that hydrolyze carbohydrates into glucose. One strategy that has been developed to treat type-2 diabetes is inhibition of the activity of alpha-glucosidases using synthetic drugs. However, these inhibitors are usually associated with gastrointestinal side effects. Therefore, the development of inhibitors from natural products offers an alternative option for the control of hyperglycemia. In recent years, various studies have been conducted to identify alpha-glucosidases inhibitors from natural sources such as plants, and many candidates have transpired to be secondary metabolites including alkaloids, flavonoids, phenols, and terpenoids. In this review, we focus on the alpha-glucosidases inhibitors found in common vegetable crops and the major classes of phytochemicals responsible for the inhibitory activity, and also as potential/natural drug candidates for the treatment of type-2 diabetes mellitus. In addition, possible breeding strategies for production of improved vegetable crops with higher content of the inhibitors are also described.
Collapse
Affiliation(s)
- Samuel Tilahun Assefa
- National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Wanju-gun, Jellabuk-do 55365, Korea; (S.T.A.); (E.-Y.Y.); (S.-Y.C.); (M.-C.C.)
- Department of Horticulture, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Korea;
| | - Eun-Young Yang
- National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Wanju-gun, Jellabuk-do 55365, Korea; (S.T.A.); (E.-Y.Y.); (S.-Y.C.); (M.-C.C.)
| | - Soo-Young Chae
- National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Wanju-gun, Jellabuk-do 55365, Korea; (S.T.A.); (E.-Y.Y.); (S.-Y.C.); (M.-C.C.)
| | - Mihye Song
- World Vegetable Center Korea Office (WKO), Wanju-gun, Jellabuk-do 55365, Korea;
| | - Jundae Lee
- Department of Horticulture, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Korea;
| | - Myeong-Cheoul Cho
- National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Wanju-gun, Jellabuk-do 55365, Korea; (S.T.A.); (E.-Y.Y.); (S.-Y.C.); (M.-C.C.)
| | - Seonghoe Jang
- World Vegetable Center Korea Office (WKO), Wanju-gun, Jellabuk-do 55365, Korea;
- Correspondence: ; Tel.: +82-63-238-6677
| |
Collapse
|
11
|
Nguekouo PT, Kuate D, Kengne APN, Woumbo CY, Tekou FA, Oben JE. Effect of boiling and roasting on the antidiabetic activity ofAbelmoschus esculentus(Okra) fruits and seeds in type 2 diabetic rats. J Food Biochem 2018. [DOI: 10.1111/jfbc.12669] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Phylippe Tekem Nguekouo
- Faculty of Science, Laboratory of Medicinal Plants Biochemistry, Food Science and Nutrition, Department of Biochemistry University of Dschang Dschang Cameroon
- Faculty of Science, Laboratory of Nutrition and Nutritional Biochemistry, Department of Biochemistry University of Yaoundé 1 Yaoundé Cameroon
| | - Dieudonné Kuate
- Faculty of Science, Laboratory of Medicinal Plants Biochemistry, Food Science and Nutrition, Department of Biochemistry University of Dschang Dschang Cameroon
- Faculty of Science, Laboratory of Nutrition and Nutritional Biochemistry, Department of Biochemistry University of Yaoundé 1 Yaoundé Cameroon
| | - Anne Pascale Nouemsi Kengne
- Faculty of Science, Laboratory of Medicinal Plants Biochemistry, Food Science and Nutrition, Department of Biochemistry University of Dschang Dschang Cameroon
- Faculty of Science, Laboratory of Nutrition and Nutritional Biochemistry, Department of Biochemistry University of Yaoundé 1 Yaoundé Cameroon
| | - Cerile Ypolyte Woumbo
- Faculty of Science, Laboratory of Medicinal Plants Biochemistry, Food Science and Nutrition, Department of Biochemistry University of Dschang Dschang Cameroon
| | - Florian Amel Tekou
- Faculty of Science, Laboratory of Medicinal Plants Biochemistry, Food Science and Nutrition, Department of Biochemistry University of Dschang Dschang Cameroon
- Faculty of Science, Laboratory of Nutrition and Nutritional Biochemistry, Department of Biochemistry University of Yaoundé 1 Yaoundé Cameroon
| | - Julius Enyong Oben
- Faculty of Science, Laboratory of Nutrition and Nutritional Biochemistry, Department of Biochemistry University of Yaoundé 1 Yaoundé Cameroon
| |
Collapse
|
12
|
Ramadhan R, Phuwapraisirisan P. Arylalkanones from Horsfieldia macrobotrys are Effective Antidiabetic Agents Achieved by α-Glucosidase Inhibition and Radical Scavenging. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Horsfielda macrobotrys Merr has long been used by Dayak people in East Kalimantan of Indonesia, for diabetes therapy. Inspired by ethnopharmacological use and promising α-glucosidase and radical scavenging activities, an attempt to identify the active components was carried out. Bioassay-guided isolation yielded two related arylalkanones named 1-(2,4,6-trihydroxyphenyl)-9-phenylnonan-1-one (1) and malabaricone A (2). Arylalkanone 1 showed potent radical scavenging comparable with that of the standard antioxidant, ascorbic acid, and promising inhibition against α-glucosidases. Noticeably, arylalkanone 1 was 3-30 times more potent than malabaricone A (2) in all bioassays examined, thus suggesting the critical role in exerting bioactivities of the hydroxy group on the aryl moiety. This hypothesis was also supported by reduction in inhibitory effects of the methyl ether analogues 1a and 2a. Arylalkanone 1 inhibited yeast α-glucosidase in a mixed-type manner in which the noncompetitive pathway was dominant over competitive inhibition. This study is the first report of α-glucosidase inhibition of arylalkenone-type compounds and the first phytochemicals from H. macrobotrys.
Collapse
Affiliation(s)
- Rico Ramadhan
- Program of Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- International Excellent Program, Mulawarman University, Samarinda 75119, East Kalimantan, Indonesia
| | - Preecha Phuwapraisirisan
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| |
Collapse
|
13
|
Abelmoschus esculentus (L.) Moench polysaccharide enhances the resistance of Bifidobacterium longum MYL16 to freeze-drying and artificially digestive processes. J Funct Foods 2014. [DOI: 10.1016/j.jff.2014.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
14
|
Damsud T, Grace MH, Adisakwattana S, Phuwapraisirisan P. Orthosiphol A from the Aerial Parts of Orthosiphon aristatus is Putatively Responsible for Hypoglycemic Effect via α-Glucosidase Inhibition. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400900512] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
An infusion of Orthosiphon aristatus has long been used for diabetes therapy; however, the active principles remained unknown. Herein, we report the identification of the putative agents responsible for this antidiabetic activity using an α-glucosidase-guided isolation. Four flavonoids named sinensetin (1), salvigenin (2), tetramethylscutellarein (3) and 3,7,4′-tri- O-methylkaempferol (4), together with a diterpenoid named orthosiphol A (5), were characterized, based on analysis of their spectroscopic data. Flavonoids 3 and 4 inhibited yeast α-glucosidase with IC50 values of 6.34 and 0.75 mM, respectively, whereas orthosiphol A (5) selectively inhibited intestinal maltase with an IC50 value of 6.54 mM. A kinetic investigation of 5 indicated that it retarded maltase function in a noncompetitive manner.
Collapse
Affiliation(s)
- Thanakorn Damsud
- Program of Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Mary H. Grace
- Plant for Human Health Institute, North Carolina State University, 600 Laureate Way, Kannapolis, NC 28082, USA
| | - Sirichai Adisakwattana
- Department of Nutrition and Dietetics, Faculty of Allied Health Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Preecha Phuwapraisirisan
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| |
Collapse
|