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Hamadjida A, Mbomo REA, Minko SE, Ntchapda F, Kilekoung Mingoas JP, Nnanga N. Antioxidant and anti-inflammatory effects of Boswellia dalzielii and Hibiscus sabdariffa extracts in alloxan-induced diabetic rats. Metabol Open 2024; 21:100278. [PMID: 38455229 PMCID: PMC10918424 DOI: 10.1016/j.metop.2024.100278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/20/2024] [Accepted: 02/22/2024] [Indexed: 03/09/2024] Open
Abstract
Diabetes mellitus (DM) is one of the leading worldwide public health problems. It is characterized by hyperglycemia which induces oxidative stress and inflammation, both involved in the pathogenesis of diabetes. We previously showed that Boswellia dalzielii (BD) and Hibiscus sabdariffa (HS) extracts reduced hyperglycemia and hyperlipidemia in alloxan-induced diabetic rats. In the present study, we evaluated the antioxidant and anti-inflammatory activities of both plants in alloxan-induced diabetic rats. Two sets of experiments were conducted in male Wistar rats subjected to a single intraperitoneal injection of alloxan monohydrate (150 mg/kg, b. w.). Then, diabetic rats were daily administered with either BD (1st set of experiments) or HS (2nd set of experiments) at 100, 200, and 400 mg/kg orally for 21 consecutive days. Glibenclamide (10 mg/kg) was also administered as a reference drug. At the end of the study, the animals were anesthetized, and blood samples were collected from each animal. Then, oxidative stress and inflammatory biomarkers in the serum were determined. We found that treatment with BD and HS significantly reduced malondialdehyde (MDA) and enhanced the levels of reduced glutathione (GSH), superoxide dismutase (SOD), and catalase (CAT). These extracts also significantly decreased the inflammatory markers tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and interleukin-1 beta (IL-1β). From the results obtained, it can therefore be concluded that BD and HS have the potential to being developed as natural sources of antioxidant and anti-inflammatory agents that can be used for the prevention or treatment of DM.
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Affiliation(s)
- Adjia Hamadjida
- Department of Life Science, Higher Teacher Training College, University of Bertoua, Bertoua, Cameroon
- Pharmacological Research Laboratory of Medicinal Plants, Higher Teacher Training College, University of Bertoua, Bertoua, Cameroon
| | | | - Stéphane Essono Minko
- Department of Life Science, Higher Teacher Training College, University of Bertoua, Bertoua, Cameroon
- Research Unit of Animal Physiology and Phytopharmacology, Department of Animal Biology, Faculty of Science, University of Dschang, P. O. Box 67, Dschang, Cameroon
| | - Fidèle Ntchapda
- Department of Biological Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
| | | | - Nga Nnanga
- Department of Galenic Pharmacy and Pharmaceutical Legislation, Faculty of Medicine and Biomedical Science, University of Yaounde I, Yaounde, Cameroon
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Manzano-Pech L, Guarner-Lans V, Elena Soto M, Díaz-Díaz E, Pérez-Torres I. Alteration of the aortic vascular reactivity associated to excessive consumption of Hibiscus sabdariffa Linnaeus: Preliminary findings. Heliyon 2023; 9:e20020. [PMID: 37810051 PMCID: PMC10559753 DOI: 10.1016/j.heliyon.2023.e20020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/18/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023] Open
Abstract
The moderate production of reactive oxidative species (ROS) is important because ROS act as second messengers. However, their depletion through the over-activity of the antioxidant system may lead to reductive stress (RS) which is characterized by an increase in reducing equivalents and an elevation of some components of the antioxidant system disturbing redox homeostasis. Hibiscus sabdariffa Linnaeus (HSL) is a plant with antioxidant properties that provides compounds that favor the antioxidant system. However, excess chronic consumption could lead to the over expression of the antioxidant enzymatic system, and this could contribute to decrease ROS. Therefore, the objective of this study was to evaluate the alteration of the vascular reactivity associated to excessive and chronic consumption of HSL infusions at different percentages. 40 male Wistar rats were divided into 4 groups. Group 1 control (drinking tap water), group 2, 3 and 4, drinking water supplemented with 15, 30 and 60 g/L of HSL calyxes respectively. The systolic blood pressure (SBP), vascular reactivity, morphological changes, and different components of the enzymatic antioxidant system were evaluated in the thoracic aorta by spectrophotometry. We also determined glucose-6-phosphate dehydrogenase (G6PD), glutathione-S-transferase (GST), thioredoxin-reductase (TrxR), glutathione peroxidase (GPx) and glutathione reductase (GR) and some markers of the non-enzimatic system such as the NO3-/NO2-ratio, glutathione (GSH), selenium, thiols, lipoperoxidation (LPO), and 3-nitrityrosine (3-NT). Vasoconstriction was increased and vasorelaxation was decreased. These alterations were reversed by O2- and H2O2. There was an increase in the wall thickness and elastic fibers (p = 0.004 and p = 0.02, respectively) and in G6PD, GPX, TrxR (p = 0.02, p = 0.03, and p = 0.01 respectively). LPO, GSH (p = 0.01), and selenium (p = 0.04) were decreased. There was a decrease in thiols (p < 0.001), 3-NT (p = 0.04) and GST (p = 0.0005) in rats that received the infusion at 3 and 6%. The excess antioxidants provided by the HSL infusions at 3% and 6% modified vascular reactivity, increasing the enzymatic antioxidant system, and depleting ROS.
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Affiliation(s)
- Linaloe Manzano-Pech
- Departments of Cardiovascular Biomedicine, Institute National of Cardiology Ignacio Chávez, Juan Badiano 1, Section XVI, Tlalpan, 14080, México, USA
| | - Verónica Guarner-Lans
- Physiology Institute National of Cardiology Ignacio Chávez, Juan Badiano 1, Section XVI, Tlalpan 14080, México, USA
| | - María Elena Soto
- Immunology, Institute National of Cardiology Ignacio Chávez, Juan Badiano 1, Section XVI, Tlalpan, 14080, México, USA
| | - Eulises Díaz-Díaz
- Department of Reproductive Biology, Institute National of medical Sciences and Nutrition Salvador Zubirán, Vasco de Quiroga 15, Section XVI, Tlalpan, 14000, México, USA
| | - Israel Pérez-Torres
- Departments of Cardiovascular Biomedicine, Institute National of Cardiology Ignacio Chávez, Juan Badiano 1, Section XVI, Tlalpan, 14080, México, USA
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Ujianti I, Sianipar IR, Prijanti AR, Hasan I, Arozal W, Jusuf AA, Wibowo H, Prihartono J, Amani P, Santoso DIS. Effect of Roselle Flower Extract ( Hibiscus sabdariffa Linn.) on Reducing Steatosis and Steatohepatitis in Vitamin B12 Deficiency Rat Model. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1044. [PMID: 37374248 DOI: 10.3390/medicina59061044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/16/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023]
Abstract
Background and Objectives: Non-alcoholic Fatty Liver Disease (NAFLD) can occur as a result of micronutrient deficiencies. Hibiscus sabdarifa, a plant used in traditional medicine, contains ingredients that can help prevent this process. This study looked at the potency of Hibiscus sabdariffa Ethanol Extract (HSE) to prevent homocysteine-induced liver damage in animals that were deficient in vitamin B12. Materials and Methods: A comparative study of the effects of roselle extract is presented in an experimental design. Thirty Sprague-Dawley rats were divided into six groups using randomization. To demonstrate the absence of liver damage in the experimental animals under normal conditions, a control group was fed a normal diet without HSE. For the induction of liver damage in the experimental animals, the vitamin B12-restricted group was administered a vitamin B12-restricted diet. To test the effect of HSE on liver damage, the treatment group was given HSE along with a vitamin B12-restricted diet. Each group was given two treatment periods of eight and sixteen weeks. These results were compared with the results of the parameter examination between the vitamin B12 restriction group, with and without HSE, using an ANOVA statistic. The data were analyzed with licensed SPSS 20.0 software. Results: HSE significantly increased the blood levels of vitamin B12 while lowering homocysteine levels. The administration of HSE reduced liver damage based on the activity of liver function enzymes in the plasma due to a limitation of vitamin B12. HSE decreased Sterol Regulatory Element-Binding Protein-1c (SREBP1c) and Nuclear Factor Kappa B (NFkB) protein expressions in the liver tissue, but did not decrease Glucose-Regulated Protein 78 (GRP78) protein expression. Significantly, the levels of Tumor Necrosis Factor alpha (TNF-a) and IL-6 in the liver tissue were lower, while the levels of IL-10 and Nuclear factor-erythroid-2 Related Factor 2 (NRF2) were higher with HSE administration. HSE produced a better histopathological profile of the Hematoxylin and Eosin (H&E)-Masson tricrome for inflammation, fat and fibrosis in the liver. Conclusions: In this study, HSE was found to slow the development of liver damage in experimental animals that were given a vitamin B12-deficient diet.
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Affiliation(s)
- Irena Ujianti
- Departement of Medical Physiology, Faculty of Medicine, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta 121130, Indonesia
- Graduate Student in Doctoral Program in Medical Sciences, Faculty of Medicine Universitas Indonesia, Jakarta 10430, Indonesia
| | - Imelda Rosalyn Sianipar
- Departement of Medical Physiology, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Ani Retno Prijanti
- Departement of Biochemistry and Molecular Biology, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Irsan Hasan
- Departement of Internal Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Wawaimuli Arozal
- Departement of Pharmacology and Therapeutic, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Ahmad Aulia Jusuf
- Departement of Histology, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Heri Wibowo
- Departement of Parasitology, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Joedo Prihartono
- Departement of Community Medicine, Universitas Indonesia, Jakarta 10320, Indonesia
| | - Patwa Amani
- Departement of Medical Physiology, Faculty of Medicine, Universitas Trisakti, Jakarta 11440, Indonesia
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Oliveira DBOD, Cunha GA, Giandoni MA, Carvalho PCDJ, Bonfim GF, Leopoldo APL, Leopoldo AS, Sugizaki MM. HIBISCUS INCREASES FUNCTIONAL CAPACITY AND THE ANTI-OBESITY EFFECT IN TRAINED OBESE RATS. REV BRAS MED ESPORTE 2023. [DOI: 10.1590/1517-8692202329012022_0119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction Hibiscus sabdariffa (Hs) has been widely used for weight loss and in the fight against obesity-associated comorbidities. Objective To evaluate the effects of Hs and physical training on the functional capacity of normal-weight and obese rats. Methods Wistar rats were distributed into eight experimental groups: control (C, n = 8) , Hibiscus Sabdariffa (Hs, n = 8), high-intensity interval training (IT, n = 8), high-intensity interval training + Hibiscus Sabdariffa (ITHs, n = 8), obese (O, n = 8), obese + continuous aerobic training (OAT, n = 8), obese + Hibiscus Sabdariffa (OHs, n = 8), , and obese + continuous aerobic training + Hibiscus Sabdariffa (OATHs, n = 8). Hibiscus Sabdariffa extract was administered for 60 days in a dose of 150 mg/kg of body weight. The maximum progressive effort test (MPET) was performed on a treadmill at the beginning and end of the study. The variables analyzed were maximum speed Vmáx time, and distance covered. Lactate was measured immediately after the MPET. Functional capacity was evaluated by the distance/adiposity index. The ANOVA with Bonferroni post hoc and Pearson’s correlation tests were used at a 5% significance level. Results After both types of training, moderate-intensity continuous and high-intensity interval performed on the treadmill, final body weight, weight gain, and the adiposity index decreased, and Vmax, time, and distance covered in the MPET increased, in addition to an improvement in functional capacity. Hs supplementation reduced the adiposity index in normal-weight and obese rats. Hs associated with aerobic training reduced final body weight and increased functional capacity. Conclusion Hs supplementation promoted a reduction in the adiposity index in normal-weight and obese rats and an increase in the functional capacity of trained obese rats. Level of Evidence III; Therapeutic Studies - Outcome Investigation. Case study – control.
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Hibiscus sabdariffa in Diabetes Prevention and Treatment—Does It Work? An Evidence-Based Review. Foods 2022; 11:foods11142134. [PMID: 35885378 PMCID: PMC9319339 DOI: 10.3390/foods11142134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/13/2022] [Accepted: 07/15/2022] [Indexed: 11/28/2022] Open
Abstract
Diabetes is currently a global health problem that is already reported as an epidemic. This metabolic disease, characterized by a disturbance in the carbohydrate, protein, and lipid metabolism, is often accompanied by disorders of several organs. Its treatment is expensive and often difficult to control. Therefore, it seems necessary to search for new drugs and solutions to facilitate therapy and reduce treatment costs. Herbal medicines are becoming more and more popular. Hibiscus sabdariffa (roselle) is a plant that grows wild in a tropical climate. It has been used in folk medicine for thousands of years. Thanks to the numerous active compounds, including polyphenols, polysaccharides, organic acids, or pectins, it is reported to exhibit hypoglycemic, antioxidant, hypotensive, and anti-lipidemic activities and numerous indirect effects that are related to them. The aim of this review was to update the knowledge about the therapeutic effects of roselle in diabetes and its comorbidities based on in vitro, animal, and human studies. After a careful analysis of the scientific literature, it can be stated that roselle is a promising product that can be used either on its own or as an addition to the conventional treatment regimens to prevent or treat diabetes and its accompanying diseases.
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The Ameliorative Role of Hibiscetin against High-Fat Diets and Streptozotocin-Induced Diabetes in Rodents via Inhibiting Tumor Necrosis Factor-α, Interleukin-1β, and Malondialdehyde Level. Processes (Basel) 2022. [DOI: 10.3390/pr10071396] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hibiscetin, as one of the main bioactive constituents of Hibiscus sabdariffa, has many pharmacological activities, but its antihyperglycemic activity has not been fully interpreted yet. The current research was developed from this perspective. The study intended to appraise the antidiabetic capability of hibiscetin in a high-fat diet (HFD) and streptozotocin (STZ; 50 mg/kg, intraperitoneally)-induced diabetes in an experimental animal. The efficiency of hibiscetin at 10 mg/kg in an “HFD/STZ model” remedy in rats with experimentally caused diabetes was explored for 42 days. The efficacy of hibiscetin was observed on several diabetes parameters. The average body weight and an array of biochemical markers were determined, including blood glucose, insulin, total protein (TP), lipid profile, aspartate aminotransferase (AST), alanine aminotransferase (ALT), IL-6, IL-1β, tumor necrosis factor-α (TNF-α), adiponectin, leptin, resistin, malondialdehyde (MDA), catalase (CAT), glutathione (GSH), and superoxide dismutase (SOD). The antidiabetic benefits of hibiscetin were proven by a substantial reduction in blood glucose, lipid profile (TC and TG), total protein, IL-6, IL-1β, MDA, TNF-α, leptin, adiponectin, ALT, and AST in the therapy group compared to the diabetic disease standard. Furthermore, hibiscetin therapy also reversed the lowered levels of insulin, resistin, GSH, SOD, and CAT in diabetic rats. It was determined that hibiscetin may be beneficial in terms of reducing diabetes problems due to its effects on both oxidative stress and inflammation and that more research for this design should be conducted.
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Daskalova E, Delchev S, Vladimirova-Kitova L, Kitov S, Denev P. Black Chokeberry ( Aronia melanocarpa) Functional Beverages Increase HDL-Cholesterol Levels in Aging Rats. Foods 2021; 10:1641. [PMID: 34359511 PMCID: PMC8304029 DOI: 10.3390/foods10071641] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/05/2021] [Accepted: 07/12/2021] [Indexed: 01/14/2023] Open
Abstract
Plant-based foods rich in phenolic phytochemicals are among the promising strategies to counteract age-related changes in lipid profile. Aronia melanocarpa (AM) fruits are a rich source of phenolic compounds possessing lipid-modulating effects. The present study investigated the effect of 3-month supplementation of AM-based functional beverages on the lipid profile of healthy aging rats. Male Wistar rats (n = 40) were separated into five groups: (YC) young controls (2-month-old); (AC) adult controls (13-month-old); (A) adult animals supplemented with pure AM extract; (A + P) adult animals supplemented with pectin-enriched (1%) AM extract; (A + H) adult animals supplemented with AM extract enriched with a herbal mixture. Total cholesterol (TC), triglycerides (TG), HDL-cholesterol (HDL-C), LDL-cholesterol (LDL-C) and atherogenic indices were investigated at the end of the study. Adult controls demonstrated age-related dyslipidemia resulting in decreased HDL-C, and increased TG and TC/HDL index. The supplemented groups showed a significant increase in HDL-C levels: A + P (1.49 mmol/L) and A + H (1.61 mmol/L), respectively, vs. AC (1.09 mmol/L), p < 0.05. The TC/HDL-C and LDL-C/HDL-C indices were decreased in the A + P and A + H groups in comparison to the AC group (p < 0.05). These results indicate that supplementation with polyphenol-rich AM beverages can successfully alter HDL-C levels and this effect is further potentiated by pectin and herbs.
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Affiliation(s)
- Elena Daskalova
- Department of Anatomy, Histology and Embryology, Medical University, 4000 Plovdiv, Bulgaria;
| | - Slavi Delchev
- Department of Anatomy, Histology and Embryology, Medical University, 4000 Plovdiv, Bulgaria;
| | - Lyudmila Vladimirova-Kitova
- I-st Department of Internal Diseases, Section of Cardiology, Medical University, 4000 Plovdiv, Bulgaria;
- Clinic of Cardiology, St. George University Hospital, 4000 Plovdiv, Bulgaria;
| | - Spas Kitov
- Clinic of Cardiology, St. George University Hospital, 4000 Plovdiv, Bulgaria;
| | - Petko Denev
- Laboratory of Biologically Active Substances, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Science, 4000 Plovdiv, Bulgaria
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Janson B, Prasomthong J, Malakul W, Boonsong T, Tunsophon S. Hibiscus sabdariffa L. calyx extract prevents the adipogenesis of 3T3-L1 adipocytes, and obesity-related insulin resistance in high-fat diet-induced obese rats. Biomed Pharmacother 2021; 138:111438. [PMID: 33721756 DOI: 10.1016/j.biopha.2021.111438] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/11/2021] [Accepted: 02/23/2021] [Indexed: 10/21/2022] Open
Abstract
Roselle (Hibiscus sabdariffa) is reported to be beneficial in treating obesity which can develop into a range of metabolic disorders. The molecular mechanisms by which roselle extract works to prevent obesity-related insulin resistance remains poorly understood. We hypothesized that the roselle extract can decrease lipid accumulation and improve insulin resistance by downregulating adipogenesis. The aim of this study is to investigate the protective effect of roselle extract on the mechanism of adipogenesis and prevent complications of the obesity-related insulin resistance in high-fat diet-induced obese rats for 8 weeks. Male Sprague Dawley rats were divided into 4 groups: control (C), high-fat diet (HFD), high-fat diet supplemented with 250 mg/kg BW of roselle (R250), and high-fat diet supplemented with 500 mg/kg BW of roselle (R500). The results demonstrated that roselle had the potential to reduce body weight, food intake, lipid profiles, inflammatory cytokines, lipid peroxidation, serum leptin, insulin and duodenal glucose absorption, while significantly increased glucose uptake of adipose tissue and muscle when compared to the HFD group. Roselle can prevent lipid accumulation by suppressing differentiation of 3T3-L1 adipocyte by downregulating the adipogenic gene expression. The results of this study demonstrated that the molecular mechanism underlying the protective effect of roselle, could be an alternative approach for obesity-related insulin resistance prevention.
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Affiliation(s)
- Benjarat Janson
- Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand
| | - Janjira Prasomthong
- Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand
| | - Wachirawadee Malakul
- Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand
| | - Tantip Boonsong
- Department of Biochemistry, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand
| | - Sakara Tunsophon
- Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand; Centre of Excellence for Innovation in Chemistry, Naresuan University, Phitsanulok 65000 Thailand.
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Virgen-Carrillo CA, de Los Ríos DLH, Torres KR, Moreno AGM. Diagnostic Criteria for Metabolic Syndrome in Diet-Induced Rodent Models: A Systematic Review. Curr Diabetes Rev 2021; 17:e140421192834. [PMID: 33855947 DOI: 10.2174/1573399817666210414103730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 01/14/2021] [Accepted: 02/09/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Thousands of publications in recent years have addressed the induction of metabolic syndrome (MetS) in rodents. However, the criteria and the reference values for diagnosing this disease have not been defined. OBJECTIVE Our main objective was to carry out a systematic review to gather evidence about the criteria for biochemical and anthropometric parameters in which scientific studies have relied on to report that rats developed MetS from a previous dietary manipulation. METHODS We compiled characteristics and findings of diet-induced MetS with high-fat, high-carbohydrate, high-fat/high-carbohydrates, and cafeteria diet from PubMed and Science Direct databases published in the last 5 years. RESULTS The results on the principal determinants for the syndrome, published in the reviewed articles, were chosen to propose reference values in the rat models of food induction. CONCLUSION The values obtained will serve as reference cut-of points in the development of the disease; in addition, the compilation of data will be useful in planning and executing research protocols in animal models.
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Affiliation(s)
- Carmen Alejandrina Virgen-Carrillo
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición, Centro Universitario del Sur, Universidad de Guadalajara, Jalisco, Mexico
| | - Diana Laura Hernández de Los Ríos
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición, Centro Universitario del Sur, Universidad de Guadalajara, Jalisco, Mexico
| | - Karina Ruíz Torres
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición, Centro Universitario del Sur, Universidad de Guadalajara, Jalisco, Mexico
| | - Alma Gabriela Martínez Moreno
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición, Centro Universitario del Sur, Universidad de Guadalajara, Jalisco, Mexico
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Magenis ML, Damiani AP, de Marcos PS, de Pieri E, de Souza E, Vilela TC, de Andrade VM. Fructose consumption during pregnancy and lactation causes DNA damage and biochemical changes in female mice. Mutagenesis 2020; 35:179-187. [PMID: 31967303 DOI: 10.1093/mutage/geaa001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 01/07/2020] [Indexed: 11/14/2022] Open
Abstract
The consumption of fructose during pregnancy can cause hyperglycaemia and may stimulate production of reactive oxygen species; however, there are only a few studies reporting whether fructose consumption during pregnancy causes DNA damage. Therefore, the aim of this study was to evaluate the effects of fructose consumption on genetic and biochemical parameters in Swiss mice treated during pregnancy and lactation. For this, 15 couples of 60-day-old Swiss mice were divided into three groups of five couples: negative control (water) and two fructose groups (fructose dose of 10%/l and 20%/l). During this period, we evaluated food consumption, energy efficiency and body weight. Samples of blood were collected from the females before copulation, after the 15th day of conception and on the 21st day after the lactation period, for the glycaemic and lipid profiles as well as comet assay and micronucleus (MN) test. Comet assay and MN test evaluate DNA damage and clastogenicity, respectively. In the gestation and lactation period, the two fructose doses tested showed DNA damage as observed in the comet assay, which is associated with an increase in dietary intake, body weight, lipid profile and fasting glycaemia in females. Thus, it can be suggested that the high consumption of fructose during these periods is harmful for pregnancy and lactation.
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Affiliation(s)
- Marina Lummertz Magenis
- Laboratory of Translational Biomedicine, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Adriani Paganini Damiani
- Laboratory of Translational Biomedicine, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Pamela Souza de Marcos
- Laboratory of Translational Biomedicine, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Ellen de Pieri
- Laboratory of Translational Pathophysiology, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Emanuel de Souza
- Course of Biomedicine, Graduate Program of Health Sciences, Department of Health Sciences, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Thais Ceresér Vilela
- Laboratory of Translational Biomedicine, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Vanessa Moraes de Andrade
- Laboratory of Translational Biomedicine, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
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Protective Role of Picralima nitida Seed Extract in High-Fat High-Fructose-Fed Rats. Adv Pharmacol Pharm Sci 2020; 2020:5206204. [PMID: 33163962 PMCID: PMC7604582 DOI: 10.1155/2020/5206204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 09/22/2020] [Accepted: 10/03/2020] [Indexed: 12/23/2022] Open
Abstract
Picralima nitida is a therapeutic herb used in ethnomedicine for the management of several disease conditions including diabetes. This study examined the potential palliative effect of aqueous seed extract of Picralima nitida (APN) on dyslipidemia, hyperglycemia, oxidative stress, insulin resistance, and the expression of some metabolic genes in high-fat high-fructose-fed rats. Experimental rats (2 months old) were fed a control diet or a high-fat diet with 25% fructose (HFHF diet) in their drinking water for nine weeks. APN was administered orally during the last four weeks. Anthropometric and antioxidant parameters, lipid profile, plasma glucose, and insulin levels and the relative expression of some metabolic genes were assessed. APN caused a significant decrease (P < 0.05) in weight gained, body mass index, insulin resistance, plasma glucose, and insulin levels. High-density lipoprotein cholesterol level was significantly increased (P < 0.05), while triacylglycerol, cholesterol, low-density lipoprotein, cardiac index, atherogenic index, coronary artery index, and malondialdehyde levels in plasma and liver samples were also significantly decreased (P < 0.05) by APN at all experimental doses when compared to the group fed with an HFHF diet only. APN also significantly (P < 0.05) upregulated the relative expression of glucokinase, carnitine palmitoyltransferase-1 (CPT-1), and leptin at 400 mg/kg body weight when compared to the group fed with an HFHF diet only. This study showed that APN alleviated dyslipidemia, hyperglycemia, and oxidant effect associated with the intake of a high-fat high-fructose diet.
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Ajala-Lawal RA, Aliyu NO, Ajiboye TO. Betulinic acid improves insulin sensitivity, hyperglycemia, inflammation and oxidative stress in metabolic syndrome rats via PI3K/Akt pathways. Arch Physiol Biochem 2020; 126:107-115. [PMID: 30288995 DOI: 10.1080/13813455.2018.1498901] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This study investigated the influence of betulinic acid on high-fructose diet-induced metabolic syndrome in rats. Oral administration of betulinic acid significantly reversed high-fructose diet-mediated increase in body mass index and blood glucose. Furthermore, betulinic acid restored high-fructose diet-mediated alterations in metabolic hormones (insulin, leptin and adiponectin). Betulinic acid-mediated upregulation of protein kinase B (Akt) and phosphoinositde-3 kinase (PI3K) anulled high-fructose diet mediated depletion. Also, elevated tumour necrosis factor-α, interleukin-6 and -8 were significantly lowered. Administration of betulinic acid restored high-fructose diet-mediated increase in the levels of lipid profile parameters and indices of atherosclerosis, cardiac and cardiovascular diseases. High-fructose diet-mediated decrease in activities of antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase and glucose 6-phosphate dehydrogenase) and increase in oxidative stress biomarkers (reduced glutathione, lipid peroxidation products, protein oxidation and fragmented DNA) were significantly restored by the phenolic acids. Conclusively, betulinic acid improves insulin sensitivity, elevated blood glucose, inflammation and dyslipidaemia and oxidative stress in high-fructose diet-induced metabolic syndrome through the PI#Kand Akt pathways .
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Affiliation(s)
- R A Ajala-Lawal
- Antioxidants, Redox Biology and Toxicology Research Group, Department of Medical Biochemistry, College of Health Sciences, Nile University of Nigeria, Abuja, Nigeria
| | - N O Aliyu
- Antioxidants, Redox Biology and Toxicology Research Group, Department of Medical Biochemistry, College of Health Sciences, Nile University of Nigeria, Abuja, Nigeria
| | - T O Ajiboye
- Antioxidants, Redox Biology and Toxicology Research Group, Department of Medical Biochemistry, College of Health Sciences, Nile University of Nigeria, Abuja, Nigeria
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Alegbe EO, Teralı K, Olofinsan KA, Surgun S, Ogbaga CC, Ajiboye TO. Antidiabetic activity-guided isolation of gallic and protocatechuic acids from Hibiscus sabdariffa calyxes. J Food Biochem 2019; 43:e12927. [PMID: 31353728 DOI: 10.1111/jfbc.12927] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 05/11/2019] [Accepted: 05/12/2019] [Indexed: 12/16/2022]
Abstract
We isolated and identified gallic and protocatechuic acids as the antidiabetic principles in Hibiscus sabdariffa using solvent extraction, column chromatographic fractionation, and nuclear magnetic resonance (NMR) spectroscopy. Ethylacetate fraction of the aqueous extract of H. sabdariffa inhibited α-amylase and α-glucosidase with IC50 of 411.73 and 433.93 μg/ml, respectively. Furthermore, fractions I and II obtained from column chromatography inhibited α-amylase with IC50 of 27.03 and 20.12 μg/ml, and α-glucosidase with IC50 of 24.30 and 22.29 μg/ml, respectively. In addition, the principles reduced the serum glucose and lipid peroxide levels of diabetic rats and with an improvement in the rat lipid profiles and antioxidant defenses. Fractions I and II were identified as protocatechuic acid and gallic acid, respectively, using 1 H and 13 C NMR. Protein-ligand docking showed that these compounds form multiple favorable interactions with the active-site residues of the two glycosidases. Overall, protocatechuic and gallic acids emerge as natural antidiabetic agents. PRACTICAL APPLICATIONS: Hibiscus sabdariffa (Zoborodo) is a refreshment drink for ceremonial gatherings in Nigeria. Also, its pharmacological use includes diabetes, hypertension, hyperlipidemia, metabolic syndrome, and hepatoprotection. The consumption of this food drink could improve diabetes, hypertension, dyslipidemia, metabolic syndrome, and liver disease. Furthermore, the inhibition of α-amylase and α-glucosidase could prevent diabetic complications associated with postprandial glucose. Developing the extract of H. sabdariffa calyx as food supplement could be used in managing diabetes and its associated complications such as dyslipidemia, hypertension, and metabolic syndrome.
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Affiliation(s)
- Emmanuel Ohifueme Alegbe
- Faculty of Natural and Applied Sciences, Department of Chemistry, Nile University of Nigeria, Abuja, Nigeria
| | - Kerem Teralı
- Faculty of Medicine, Department of Medical Biochemistry, Near East University, Nicosia, Cyprus
| | - Kolawole Ayodapo Olofinsan
- Faculty of Natural and Applied Sciences, Department of Biochemistry, Nile University of Nigeria, Abuja, Nigeria
| | - Serdar Surgun
- Faculty of Natural and Applied Sciences, Department of Chemistry, Nile University of Nigeria, Abuja, Nigeria
| | - Chukwuma Collins Ogbaga
- Faculty of Natural and Applied Sciences, Department of Biological Sciences, Nile University of Nigeria, Abuja, Nigeria.,Faculty of Natural and Applied Sciences, Department of Microbiology and Biotechnology, Nile University of Nigeria, Abuja, Nigeria
| | - Taofeek Olakunle Ajiboye
- Antioxidants, Redox Biology and Toxicology Research Group, Department of Medical Biochemistry, College of Health Sciences, Nile University of Nigeria, Abuja, Nigeria
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Koch K, Weldle N, Baier S, Büchter C, Wätjen W. Hibiscus sabdariffa L. extract prolongs lifespan and protects against amyloid-β toxicity in Caenorhabditis elegans: involvement of the FoxO and Nrf2 orthologues DAF-16 and SKN-1. Eur J Nutr 2019; 59:137-150. [PMID: 30710163 DOI: 10.1007/s00394-019-01894-w] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 01/05/2019] [Indexed: 12/12/2022]
Abstract
PURPOSE Hibiscus sabdariffa L. is commonly used as an ingredient for herbal teas and food supplements. Several studies demonstrated the beneficial effects of Hibiscus sabdariffa L. extracts (HSE); however, the bioactive components and their mode of action still remain unclear. Caenorhabditis elegans (C. elegans) was used to study health-related effects and the underlying molecular mechanisms of HSE in this model organism as well as effects of hydroxycitric acid (HCA), a main compound of HSE, and its structural analogue isocitric acid (ICA). METHODS Survival and locomotion were detected by touch-provoked movement. Thermotolerance was analysed using the nucleic acid stain SYTOX green, and intracellular ROS accumulation was measured via oxidation of H2DCF. Localisation of the transcription factors DAF-16 and SKN-1 was analysed in transgenic strains (DAF-16::GFP, SKN-1::GFP). The involvement of DAF-16 and SKN-1 was further investigated using loss-of-function strains as well as gene silencing by feeding RNAi-inducing bacteria. Protection against amyloid-β toxicity was analysed using a transgenic strain with an inducible expression of human amyloid-β peptides in body wall muscle cells (paralysis assay). RESULTS HSE treatment resulted in a prominent extension of lifespan (up to 24%) and a reduction of the age-dependent decline in locomotion. HCA, a main compound of HSE increased lifespan too, but to a lesser extent (6%) while ICA was not effective. HSE and HCA did not modulate resistance against thermal stress conditions and did not exert antioxidative effects: HSE rather increased intracellular ROS levels, suggesting a pro-oxidative effect of the extract in vivo. HSE and HCA increased the nuclear localisation of the pivotal transcription factors DAF-16 and SKN-1 indicating an activation of these factors. Consistent with this result, lifespan prolongation by HSE was dependent on both transcription factors. In addition to the positive effect on lifespan, HSE treatment also elicited a (strong) protection against amyloid-ß induced toxicity in C. elegans in a DAF-16- and SKN-1-dependent manner. CONCLUSION Our results demonstrate that HSE increases lifespan and protects against amyloid-β toxicity in the model organism C. elegans. These effects were mediated, at least in parts via modulation of pathways leading to activation/nuclear localisation of DAF-16 and SKN-1. Since HCA, a main component of HSE causes only minor effects, additional bioactive compounds like flavonoids or anthocyanins as well as synergistic effects of these compounds should be investigated.
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Affiliation(s)
- Karoline Koch
- Institute of Agricultural and Nutritional Sciences, Biofunctionality of Secondary Plant Compounds, Martin-Luther-University Halle-Wittenberg, Weinbergweg 22, 06120, Halle/Saale, Germany
| | - Nora Weldle
- Institute of Agricultural and Nutritional Sciences, Biofunctionality of Secondary Plant Compounds, Martin-Luther-University Halle-Wittenberg, Weinbergweg 22, 06120, Halle/Saale, Germany
| | - Sabrina Baier
- Institute of Agricultural and Nutritional Sciences, Biofunctionality of Secondary Plant Compounds, Martin-Luther-University Halle-Wittenberg, Weinbergweg 22, 06120, Halle/Saale, Germany
| | - Christian Büchter
- Institute of Agricultural and Nutritional Sciences, Biofunctionality of Secondary Plant Compounds, Martin-Luther-University Halle-Wittenberg, Weinbergweg 22, 06120, Halle/Saale, Germany
| | - Wim Wätjen
- Institute of Agricultural and Nutritional Sciences, Biofunctionality of Secondary Plant Compounds, Martin-Luther-University Halle-Wittenberg, Weinbergweg 22, 06120, Halle/Saale, Germany.
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Ibitoye OB, Ajiboye TO. Dietary phenolic acids reverse insulin resistance, hyperglycaemia, dyslipidaemia, inflammation and oxidative stress in high-fructose diet-induced metabolic syndrome rats. Arch Physiol Biochem 2018; 124:410-417. [PMID: 29260581 DOI: 10.1080/13813455.2017.1415938] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This study investigated the influence of caffeic, ferulic, gallic and protocatechuic acids on high-fructose diet-induced metabolic syndrome in rats. Oral administration of the phenolic acids significantly reversed high-fructose diet-mediated increase in body mass index and blood glucose. Furthermore, phenolic acids restored high-fructose diet-mediated alterations in metabolic hormones (insulin, leptin and adiponectin). Similarly, elevated tumour necrosis factor-α, interleukin-6 and -8 were significantly lowered. Administration of phenolic acids restored High-fructose diet-mediated increase in the levels of lipid parameters and indices of atherosclerosis, cardiac and cardiovascular diseases. High-fructose diet-mediated decrease in activities of antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase and glucose 6-phosphate dehydrogenase) and increase in oxidative stress biomarkers (reduced glutathione, lipid peroxidation products, protein oxidation and fragmented DNA) were significantly restored by the phenolic acids. The result of this study shows protective influence of caffeic acid, ferulic acid, gallic acid and protocatechuic acid in high-fructose diet-induced metabolic syndrome.
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Affiliation(s)
| | - Taofeek O Ajiboye
- b Antioxidants, Redox Biology and Toxicology Research Group, Department of Medical Biochemistry , College of Health Sciences, Nile University of Nigeria , Abuja , Nigeria
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Anthocyanins from Hibiscus sabdariffa calyx attenuate in vitro and in vivo melanoma cancer metastasis. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.07.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Herranz-López M, Olivares-Vicente M, Encinar JA, Barrajón-Catalán E, Segura-Carretero A, Joven J, Micol V. Multi-Targeted Molecular Effects of Hibiscus sabdariffa Polyphenols: An Opportunity for a Global Approach to Obesity. Nutrients 2017; 9:nu9080907. [PMID: 28825642 PMCID: PMC5579700 DOI: 10.3390/nu9080907] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 08/11/2017] [Accepted: 08/14/2017] [Indexed: 12/30/2022] Open
Abstract
Improper diet can alter gene expression by breaking the energy balance equation and changing metabolic and oxidative stress biomarkers, which can result in the development of obesity-related metabolic disorders. The pleiotropic effects of dietary plant polyphenols are capable of counteracting by modulating different key molecular targets at the cell, as well as through epigenetic modifications. Hibiscus sabdariffa (HS)-derived polyphenols are known to ameliorate various obesity-related conditions. Recent evidence leads to propose the complex nature of the underlying mechanism of action. This multi-targeted mechanism includes the regulation of energy metabolism, oxidative stress and inflammatory pathways, transcription factors, hormones and peptides, digestive enzymes, as well as epigenetic modifications. This article reviews the accumulated evidence on the multiple anti-obesity effects of HS polyphenols in cell and animal models, as well as in humans, and its putative molecular targets. In silico studies reveal the capacity of several HS polyphenols to act as putative ligands for different digestive and metabolic enzymes, which may also deserve further attention. Therefore, a global approach including integrated and networked omics techniques, virtual screening and epigenetic analysis is necessary to fully understand the molecular mechanisms of HS polyphenols and metabolites involved, as well as their possible implications in the design of safe and effective polyphenolic formulations for obesity.
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Affiliation(s)
- María Herranz-López
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández (UMH), Edificio Torregaitán, Elche 03202, Spain.
| | - Mariló Olivares-Vicente
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández (UMH), Edificio Torregaitán, Elche 03202, Spain.
| | - José Antonio Encinar
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández (UMH), Edificio Torregaitán, Elche 03202, Spain.
| | - Enrique Barrajón-Catalán
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández (UMH), Edificio Torregaitán, Elche 03202, Spain.
| | - Antonio Segura-Carretero
- Department of Analytical Chemistry, University of Granada, Avda. Fuentenueva s/n, Granada 18071, Spain.
- Research and Development of Functional Food Centre (CIDAF), PTS Granada, Avda. del Conocimiento s/n., Edificio BioRegión, Granada 18016, Spain.
| | - Jorge Joven
- Unitat de Recerca Biomèdica, Hospital Universitari Sant Joan, Institut d'Investigació Sanitària Pere Virgili, Universitat Rovira i Virgili, Reus 43201, Spain.
| | - Vicente Micol
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández (UMH), Edificio Torregaitán, Elche 03202, Spain.
- CIBER: CB12/03/30038, Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Instituto de Salud Carlos III (ISCIII), Palma de Mallorca 07122, Spain.
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Ajiboye TO, Hussaini AA, Nafiu BY, Ibitoye OB. Aqueous seed extract of Hunteria umbellata (K. Schum.) Hallier f. (Apocynaceae) palliates hyperglycemia, insulin resistance, dyslipidemia, inflammation and oxidative stress in high-fructose diet-induced metabolic syndrome in rats. JOURNAL OF ETHNOPHARMACOLOGY 2017; 198:184-193. [PMID: 27894971 DOI: 10.1016/j.jep.2016.11.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 11/18/2016] [Accepted: 11/25/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Hunteria umbellata is used in the management and treatment of diabetes and obesity in Nigeria. This study evaluates the effect of aqueous seed extract of Hunteria umbellata on insulin resistance, dyslipidemia, inflammation and oxidative stress in high-fructose diet-induced metabolic syndrome MATERIALS AND METHODS: Rats were randomized into seven groups (A-G). Control (group A) and group C rats received control diet for nine weeks while rats in groups B, D - G were placed on high-fructose diet for 9 weeks. In addition to the diets, groups C - F rats orally received 400, 100, 200 and 400mg/kg body weight aqueous seed extract of Hunteria umbellata for 3 weeks starting from 6th - 9th week. RESULTS High-fructose diet (when compared to control rats) mediated a significant (p<0.05) increase in body weight, body mass index and abdominal circumference. Similarly, levels of blood glucose, insulin, leptin, adiponectin and insulin resistance were increased. It also caused a significant increase in the levels of cholesterol, triglycerides, low-density lipoprotein cholesterol, very low-density lipoprotein cholesterol, atherogenic index, cardiac index and coronary artery index while high-density lipoprotein cholesterol was decreased significantly. Levels of proinflammatory factor, tumour necrosis factor-α, interleukin-6 and 8 were also increased by the high fructose diet. Moreover, it mediated decrease in activities of superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glucose 6-phosphate dehydrogenase and level of glutathione reduced. Conversely, levels of malondialdehyde, conjugated dienes, lipid hydroperoxides, protein carbonyl and fragmented DNA were elevated. Aqueous seed extract of Hunteria umbellata significantly ameliorated the high fructose diet-mediated alterations. CONCLUSIONS From this study, it is concluded that aqueous seed extract of Hunteria umbellata possesses hypoglycemic, hypolipidemic and antioxidants abilities as evident from its capability to extenuate insulin resistance, dyslipidemia, inflammation and oxidative stress in high-fructose diet-induced metabolic syndrome rats.
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Affiliation(s)
- T O Ajiboye
- Antioxidants, Free Radicals, Functional Foods and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria.
| | - A A Hussaini
- Antioxidants, Free Radicals, Functional Foods and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria.
| | - B Y Nafiu
- Antioxidants, Free Radicals, Functional Foods and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria.
| | - O B Ibitoye
- Antioxidants, Free Radicals, Functional Foods and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria.
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Loo S, Kam A, Xiao T, Nguyen GKT, Liu CF, Tam JP. Identification and Characterization of Roseltide, a Knottin-type Neutrophil Elastase Inhibitor Derived from Hibiscus sabdariffa. Sci Rep 2016; 6:39401. [PMID: 27991569 PMCID: PMC5171801 DOI: 10.1038/srep39401] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 11/22/2016] [Indexed: 01/08/2023] Open
Abstract
Plant knottins are of therapeutic interest due to their high metabolic stability and inhibitory activity against proteinases involved in human diseases. The only knottin-type proteinase inhibitor against porcine pancreatic elastase was first identified from the squash family in 1989. Here, we report the identification and characterization of a knottin-type human neutrophil elastase inhibitor from Hibiscus sabdariffa of the Malvaceae family. Combining proteomic and transcriptomic methods, we identified a panel of novel cysteine-rich peptides, roseltides (rT1-rT8), which range from 27 to 39 residues with six conserved cysteine residues. The 27-residue roseltide rT1 contains a cysteine spacing and amino acid sequence that is different from the squash knottin-type elastase inhibitor. NMR analysis demonstrated that roseltide rT1 adopts a cystine-knot fold. Transcriptome analyses suggested that roseltides are bioprocessed by asparagine endopeptidases from a three-domain precursor. The cystine-knot structure of roseltide rT1 confers its high resistance against degradation by endopeptidases, 0.2 N HCl, and human serum. Roseltide rT1 was shown to inhibit human neutrophil elastase using enzymatic and pull-down assays. Additionally, roseltide rT1 ameliorates neutrophil elastase-stimulated cAMP accumulation in vitro. Taken together, our findings demonstrate that roseltide rT1 is a novel knottin-type neutrophil elastase inhibitor with therapeutic potential for neutrophil elastase associated diseases.
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Affiliation(s)
- Shining Loo
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
| | - Antony Kam
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
| | - Tianshu Xiao
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
| | - Giang K T Nguyen
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
| | - Chuan Fa Liu
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
| | - James P Tam
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
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