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Knap B, Nieoczym D, Kundap U, Kusio-Targonska K, Kukula-Koch W, Turski WA, Gawel K. Zebrafish as a robust preclinical platform for screening plant-derived drugs with anticonvulsant properties-a review. Front Mol Neurosci 2023; 16:1221665. [PMID: 37701853 PMCID: PMC10493295 DOI: 10.3389/fnmol.2023.1221665] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 07/25/2023] [Indexed: 09/14/2023] Open
Abstract
Traditionally, selected plant sources have been explored for medicines to treat convulsions. This continues today, especially in countries with low-income rates and poor medical systems. However, in the low-income countries, plant extracts and isolated drugs are in high demand due to their good safety profiles. Preclinical studies on animal models of seizures/epilepsy have revealed the anticonvulsant and/or antiepileptogenic properties of, at least some, herb preparations or plant metabolites. Still, there is a significant number of plants known in traditional medicine that exert anticonvulsant activity but have not been evaluated on animal models. Zebrafish is recognized as a suitable in vivo model of epilepsy research and is increasingly used as a screening platform. In this review, the results of selected preclinical studies are summarized to provide credible information for the future development of effective screening methods for plant-derived antiseizure/antiepileptic therapeutics using zebrafish models. We compared zebrafish vs. rodent data to show the translational value of the former in epilepsy research. We also surveyed caveats in methodology. Finally, we proposed a pipeline for screening new anticonvulsant plant-derived drugs in zebrafish ("from tank to bedside and back again").
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Affiliation(s)
- Bartosz Knap
- Department of Experimental and Clinical Pharmacology, Medical University of Lublin, Lublin, Poland
| | - Dorota Nieoczym
- Department of Animal Physiology and Pharmacology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Uday Kundap
- Canada East Spine Center, Saint John Regional Hospital, Horizon Health Center, Saint John, NB, Canada
| | - Kamila Kusio-Targonska
- Department of Experimental and Clinical Pharmacology, Medical University of Lublin, Lublin, Poland
| | - Wirginia Kukula-Koch
- Department of Pharmacognosy with Medicinal Plants Garden, Medical University, Lublin, Poland
| | - Waldemar A. Turski
- Department of Experimental and Clinical Pharmacology, Medical University of Lublin, Lublin, Poland
| | - Kinga Gawel
- Department of Experimental and Clinical Pharmacology, Medical University of Lublin, Lublin, Poland
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Protective Effect of Butanolic Fraction of Delphinium brunonianum on Fructose-Mediated Metabolic Alterations in Rats. Metabolites 2022; 12:metabo12060481. [PMID: 35736413 PMCID: PMC9227329 DOI: 10.3390/metabo12060481] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/15/2022] [Accepted: 05/22/2022] [Indexed: 02/04/2023] Open
Abstract
The present study was conducted with an intent to evaluate the protective effect of butanolic fraction of Delphinium brunonianum on fructose mediated metabolic abnormalities in rats. Rats in all groups except control group were fed on 10% fructose for 6 weeks; however, rats in the treated group also received butanolic fraction for the last 3 weeks, along with the fructose. Moreover, phytoconstituents present in butanolic fraction were analyzed using LC-MS. All doses of butanolic fraction profoundly reduce the fructose-induced blood pressure, sympathetic over-activity, and weight gain. Furthermore, butanolic fraction prominently reduces the glucose intolerance and hyperinsulinemia in fructose-fed rats. On treatment with butanolic fraction, oxidative enzymes and the functionality of the aorta was also restored. Phytochemical analysis revealed the presence of several active constituents including bergenin, scopolin, rutinoside, kaempferol, coumaric acid, apigenin, and gingerol. In conclusion, butanolic fraction of Delphinium brunonianum has the potential to prevent and recover the fructose-induced metabolic perturbations.
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Batool A, Saleem M, Alamgeer, Mushtaq MN, Alotaibi NH, Alharbi KS, Bukhari SNA. The potential protective effect of the Polygonum hydropiper L against the development of fructose-induced oxidative stress and metabolic disorders in male Sprague-Dawely rats. J Pharm Pharmacol 2021; 74:585-595. [PMID: 34165561 DOI: 10.1093/jpp/rgab071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 04/28/2021] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Polygnum hydropiper L (Polygonaceae) is commonly known as smart weed. This study was designed to assess the effect of aqueous methanolic extract of P. hydropiper on oxidative stress and metabolic changes in fructose-induced hypertensive rats. METHODS Male Sprague-Dawely rats were divided into six groups of five animals each (n = 5) and designated as normotensive group with distilled water, fructose-fed group with 10% fructose, standard control group with 10% fructose plus amlodipine (10 mg/kg) and treated groups with different doses of the aqueous methanolic extract of P. hydropiper (100, 200 and 400 mg/kg) plus 10% fructose daily for 6 weeks. Body weight gain was checked every week. Blood pressure parameters [systolic (SBP), diastolic (DBP), mean arterial pressure (MAP) and heart rate (HR)] and reactivity of extract with phenylephrine and adrenaline were measured by invasive method. Metabolic changes and oxidative stress parameters were measured from blood samples. Phytochemical analysis was also performed. KEY FINDINGS Aqueous methanolic extract of P. hydropiper at 400 mg/kg decreased the blood pressure, heart rate, body weight and produced significant effect on metabolic and oxidative stress changes as compared to fructose-fed group. Phytochemical analysis revealed the presence of polyphenols and flavonoids in it. CONCLUSION The present results showed that aqueous methanolic extract of P. hydropiper possesses effect on oxidative stress and metabolic changes due to polyphenols and flavonoids.
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Affiliation(s)
- Amna Batool
- Department of Pharmacology Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Muhammad Saleem
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Alamgeer
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
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Chaudhry MA, Mushtaq MN, Bukhari IA, Assiri AM. Ipomoea hederacea Jacq.: A plant with promising antihypertensive and cardio-protective effects. JOURNAL OF ETHNOPHARMACOLOGY 2021; 268:113584. [PMID: 33189838 DOI: 10.1016/j.jep.2020.113584] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 03/24/2020] [Accepted: 11/08/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Seeds of Ipomoea hederacea Jacq. (family: Convolvulaceae) are traditionally used to treat high blood pressure and cardiac diseases. AIM OF THE STUDY Present study was conducted to validate the traditional claim and explore the possible mechanism(s) of antihypertensive effects of I. hederacea. MATERIALS AND METHODS Aqueous-ethanolic extract and activity based fractions of I. hederacea were evaluated using invasive blood pressure measuring technique, isolated tissue experiments, fructose induced hypertension/metabolic syndrome and biochemical analysis.Phytochemical analysis of active fraction was performed with aim to identify chemical composition of I. hederacea seeds. LC-MS analysis was also performed to identify the compounds proposed to be present in active fraction of I. hederacea seeds. RESULTS Crude extract/fractions of I. hederacea showed dose (0.01-100 mg/kg) dependent significant hypotensive effect in normotensive anesthetized rats, similar to verapamil (0.01-30 mg/kg). Pretreatment with hexamethonium and atropine mediated no significant changes in hypotensive effect of butanol fraction of I. hederacea (Ih.Bn) at 3 mg/kg dose. However, a significant decrease in the hypotensive effect of Ih.Bn 3 mg/kg (-34.82 ± 3.36%; p < 0.05) was observed in the presence of L-NAME (20 mg/kg). Similarly, Ih.Bn (3 mg/kg) showed no significant effect on angiotensin-II response. However, response of phenylephrine (45.60 ± 9.63%; p < 0.05) and dobutamine (18.25 ± 2.10%; p < 0.01) was significantly decreased in the presence of Ih.Bn 3 mg/kg. Ih.Bn also exhibited dose dependent (0.01-100 mg/kg) antihypertensive effect in fructose induced hypertensive rats, similar to verapamil (0.01-30 mg/kg). Concomitant treatment with Ih.Bn (3, 10 and 30 mg/kg) for six weeks showed a dose dependent profound protection with significant (p < 0.01) effect at 30 mg/kg against fructose induced basal mean arterial pressure (142.2 ± 4.62 mmHg). Ih.Bn did not significantly change response of PE, Ang-II and Epi was observed in invasive and ex vivo techniques. However, Ih.Bn significantly (p < 0.01; p < 0.001) prevented against decrease in vascular response of acetylcholine in anesthetized rats and in isolated aorta of rat. A significant dose dependent decrease in triglyceride and glucose level (p < 0.001), and increase in HDL level (p < 0.05) was observed in Ih.Bn treated groups. Results of LC-MS analysis of Ih.Bn showed the presence of 24 compounds that belong to different chemical classes, including carboxylic acid, flavonoids, oligopeptides and tripeptide that are known to have antihypertensive and vasorelaxant properties. CONCLUSIONS Results of present study indicate the presence of hypotensive/antihypertensive effect in crude extract/fractions of I. hederacea with most potent effect shown by butanol fraction (Ih.Bn), possibly mediated through α1 blocking, β blocking and iNOS/cGMP stimulating activity.
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Affiliation(s)
- Mueen Ahmad Chaudhry
- Laboratory of Cardiovascular Research and Integrative Pharmacology, College of Pharmacy, University of Sargodha, Sargodha, 40100, Pakistan; Faculty of Pharmacy, The University of Lahore, Lahore, Pakistan
| | | | - Ishfaq Ali Bukhari
- Department of Pharmacology, College of Medicine, King Saud University Riyadh, Saudi Arabia
| | - Asaad Mohamed Assiri
- Prince Abdullah Ben Khaled Celiac Disease Research Chair, Department of Pediatrics, Faculty of Medicine, King Saud University, Riyadh, Saudi Arabia
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Darkwah WK, Koomson DA, Miwornunyuie N, Nkoom M, Puplampu JB. Review: phytochemistry and medicinal properties of Solanum torvum fruits. ALL LIFE 2020. [DOI: 10.1080/26895293.2020.1817799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Williams Kweku Darkwah
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Environmental Engineering Department, College of Environment, Hohai University, Nanjing, People’s Republic of China
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Desmond Ato Koomson
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Environmental Engineering Department, College of Environment, Hohai University, Nanjing, People’s Republic of China
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Nicholas Miwornunyuie
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Environmental Engineering Department, College of Environment, Hohai University, Nanjing, People’s Republic of China
| | - Matthew Nkoom
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Environmental Engineering Department, College of Environment, Hohai University, Nanjing, People’s Republic of China
| | - Joshua Buer Puplampu
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
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Sayehmiri K, Ahmadi I, Anvari E. Fructose Feeding and Hyperuricemia: a Systematic Review and Meta-Analysis. Clin Nutr Res 2020; 9:122-133. [PMID: 32395442 PMCID: PMC7192665 DOI: 10.7762/cnr.2020.9.2.122] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/11/2020] [Accepted: 04/16/2020] [Indexed: 12/29/2022] Open
Abstract
High fructose feeding has been suggested to involve in several features of metabolic syndrome including hyperuricemia (HP). We designed and implemented a study to determine the effect size of fructose intake and the relative risk of HP based on the type of fructose feeding (diet or solution), duration of treatment (2–6, 7–10, and > 10 weeks), and animal race. The required information was accepted from international databases, including PubMed/MEDLINE, Science Direct, Scopus, and etc., from 2009 until 2019 on the basis of predetermined eligibility criteria. The data selection and extraction and quality assessment were performed independently by two researchers. Results were pooled as random effects weighting and reported as standardized mean differences with 95% confidence intervals. Thirty-five studies including 244 rats with fructose consumption were included in the final analysis. The heterogeneity rate of parameters was high (I2 = 81.3%, p < 0.001) and estimated based on; 1) type of fructose feeding (diet; I2 = 79.3%, solution 10%; I2 = 83.4%, solution 20%; I2 = 81.3%), 2) duration of treatment (2–6 weeks; I2 = 86.8%, 7–10 weeks; I2 = 76.3%, and > 10 weeks; I2 = 82.8%), 3) the animal race (Wistar; I2 = 78.6%, Sprague-Dawley; I2 = 83.9%). Overall, the pooled estimate for the all parameters was significant (p < 0.001). The results of this study indicated that a significant relationship between HP and fructose intake regardless of the treatment duration, animal race, fructose concentration and route of consumption.
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Affiliation(s)
- Kourosh Sayehmiri
- Department of Social Medicine, Faculty of Medicine, Ilam University of Medical Sciences, Ilam 6931851147, Iran
| | - Iraj Ahmadi
- Department of Physiology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam 6931851147, Iran
| | - Enayat Anvari
- Department of Physiology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam 6931851147, Iran
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Vadakkan K. Acute and sub-acute toxicity study of bacterial signaling inhibitor Solanum torvum root extract in Wister rats. CLINICAL PHYTOSCIENCE 2019. [DOI: 10.1186/s40816-019-0113-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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Kaunda JS, Zhang YJ. The Genus Solanum: An Ethnopharmacological, Phytochemical and Biological Properties Review. NATURAL PRODUCTS AND BIOPROSPECTING 2019; 9:77-137. [PMID: 30868423 PMCID: PMC6426945 DOI: 10.1007/s13659-019-0201-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 02/27/2019] [Indexed: 05/08/2023]
Abstract
Over the past 30 years, the genus Solanum has received considerable attention in chemical and biological studies. Solanum is the largest genus in the family Solanaceae, comprising of about 2000 species distributed in the subtropical and tropical regions of Africa, Australia, and parts of Asia, e.g., China, India and Japan. Many of them are economically significant species. Previous phytochemical investigations on Solanum species led to the identification of steroidal saponins, steroidal alkaloids, terpenes, flavonoids, lignans, sterols, phenolic comopunds, coumarins, amongst other compounds. Many species belonging to this genus present huge range of pharmacological activities such as cytotoxicity to different tumors as breast cancer (4T1 and EMT), colorectal cancer (HCT116, HT29, and SW480), and prostate cancer (DU145) cell lines. The biological activities have been attributed to a number of steroidal saponins, steroidal alkaloids and phenols. This review features 65 phytochemically studied species of Solanum between 1990 and 2018, fetched from SciFinder, Pubmed, ScienceDirect, Wikipedia and Baidu, using "Solanum" and the species' names as search terms ("all fields").
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Affiliation(s)
- Joseph Sakah Kaunda
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650204, People's Republic of China
- Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People's Republic of China
| | - Ying-Jun Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650204, People's Republic of China.
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China.
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Younis W, Schini-Kerth VB, Junior AG, Majid M. Cardioprotective effect of Asphodelus tenuifolius Cav. on blood pressure and metabolic alterations in glucose-induced metabolic syndrome rats-An ethnopharmacological approach. JOURNAL OF ETHNOPHARMACOLOGY 2018; 214:168-178. [PMID: 29225118 DOI: 10.1016/j.jep.2017.12.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 12/05/2017] [Accepted: 12/05/2017] [Indexed: 06/07/2023]
Affiliation(s)
- Waqas Younis
- Laboratory of Cardiovascular Research and Integrative Pharmacology, Department of Pharmacology, Faculty of Pharmacy, University of Sargodha, Sargodha 40100, Pakistan
| | - V B Schini-Kerth
- UMR CNRS 7213, Laboratory of Biophotonics and Pharmacology, Faculty of Pharmacy, University of Strasbourg, Illkirch, France
| | - Arquimedes Gasparotto Junior
- Laboratory of Electrophysiology and Cardiovascular Pharmacology, Federal University of Grande Dourados (UFGD), P.O. Box 533, 79.804-970, Dourados, MS, Brazil
| | - Muhammad Majid
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam, University, Islamabad 44000, Pakistan
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Effects of Solanum torvum fruit water extract on hyperlipidemia and sex hormones in high-fat fed male rats. Asian Pac J Trop Biomed 2017. [DOI: 10.1016/j.apjtb.2017.01.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Simaratanamongkol A, Umehara K, Niki H, Noguchi H, Panichayupakaranant P. Angiotensin-converting enzyme (ACE) inhibitory activity of Solanum torvum and isolation of a novel methyl salicylate glycoside. J Funct Foods 2014. [DOI: 10.1016/j.jff.2014.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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Rong JM, Ji HZ, Wu XW, Sun Q, Guo MX, Xu XB, Wang FY. Increased expression of chymase in inflammatory polyps in elderly patients with functional bowel disorder. Exp Ther Med 2014; 7:371-374. [PMID: 24396407 PMCID: PMC3881056 DOI: 10.3892/etm.2013.1444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 10/18/2013] [Indexed: 12/05/2022] Open
Abstract
Chymase, a chymotrypsin-like protease, is a non-angiotensin-converting enzyme (ACE) angiotensin II (Ang II)-generating enzyme. The aim of the present study was to investigate whether chymase activity was increased in inflammatory polyps of elderly patients with functional bowel disorder (FBD). This study enrolled 45 elderly patients with FBD and 44 healthy control individuals. Expression of chymase in intestinal mucosa was assessed using fluorescence quantitative polymerase chain reaction and immunohistochemistry (IHC). IHC showed an increased number of chymase-positive mast cells in inflammatory polyps than in healthy intestinal mucosa (P<0.05). Compared with healthy mucosa, expression of chymase at the mRNA and protein level was significantly higher in inflammatory polyps. The frequencies of the chymase GG genotype and the G allele type were higher in the intestinal mucosa of patients with FBD compared with healthy controls (66.67 versus 40.91%, 81.11 versus 63.63%, both P<0.05). The frequency of the G allele type in the intestinal mucosa of the C4 subgroup of FBD was higher than that in the control group. However, in other FBD subgroups, there was no difference between patients and controls. Based on the fact that enhanced chymase expression was observed in inflammatory polyps of elderly patients with FBD relative to those in healthy controls, it was concluded that chymase has a significant role in the pathogenesis of inflammatory polyps in elderly patients with FBD.
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Affiliation(s)
- Jian-Ming Rong
- Department of Geratology, No.454 Hospital of PLA, Nanjing, Jiangsu 210002, P.R. China
| | - Hong-Zan Ji
- Department of Gastroenterology, Nanjing Jin Ling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Xiao-Wei Wu
- Department of Gastroenterology, Nanjing Jin Ling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Quan Sun
- Department of Gastroenterology, Nanjing Jin Ling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Mei-Xia Guo
- Department of Gastroenterology, Nanjing Jin Ling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Xiao-Bing Xu
- Department of Gastroenterology, Nanjing Jin Ling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Fang-Yu Wang
- Department of Gastroenterology, Nanjing Jin Ling Hospital, Nanjing, Jiangsu 210002, P.R. China
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Yeh TC, Liu CP, Cheng WH, Chen BR, Lu PJ, Cheng PW, Ho WY, Sun GC, Liou JC, Tseng CJ. Caffeine intake improves fructose-induced hypertension and insulin resistance by enhancing central insulin signaling. Hypertension 2013; 63:535-41. [PMID: 24366086 DOI: 10.1161/hypertensionaha.113.02272] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Recent clinical studies found that fructose intake leads to insulin resistance and hypertension. Fructose consumption promotes protein fructosylation and formation of superoxide. In a previous study, we revealed that inhibition of superoxide production in the nucleus tractus solitarii (NTS) reduces blood pressure. Caffeine displays significant antioxidant ability in protecting membranes against oxidative damage and can lower the risk of insulin resistance. However, the mechanism through which caffeine improves fructose-induced insulin resistance is unclear. The aim of this study was to investigate whether caffeine consumption can abolish superoxide generation to enhance insulin signaling in the NTS, thereby reducing blood pressure in rats with fructose-induced hypertension. Treatment with caffeine for 4 weeks decreased blood pressure, serum fasting glucose, insulin, homeostatic model assessment-insulin resistance, and triglyceride levels and increased the serum direct high-density lipoprotein level in fructose-fed rats but not in control rats. Caffeine treatment resulted in the recovery of fructose-induced decrease in nitric oxide production in the NTS. Immunoblotting and immunofluorescence analyses further showed that caffeine reduced the fructose-induced phosphorylation of insulin receptor substrate 1 (IRS1(S307)) and reversed Akt(S473) and neuronal nitric oxide synthase phosphorylation. Similarly, caffeine was able to improve insulin sensitivity and decrease insulin levels in the NTS evoked by fructose. Caffeine intake also reduced the production of superoxide and expression of receptor of advanced glycation end product in the NTS. These results suggest that caffeine may enhance insulin receptor substrate 1-phosphatidylinositol 3-kinase-Akt-neuronal nitric oxide synthase signaling to decrease blood pressure by abolishing superoxide production in the NTS.
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Affiliation(s)
- Tung-Chen Yeh
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, 386, Ta-Chung 1st Rd, Kaohsiung, Taiwan 813, Taiwan, Republic of China. ; or Jau-Cheng Liou, Department of Biological Sciences, National Sun Yat-sen University, 70, Lien-Hai Rd, Kaohsiung, Taiwan, Republic of China. E-mail
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Gandhi GR, Ignacimuthu S, Paulraj MG. Solanum torvum Swartz. fruit containing phenolic compounds shows antidiabetic and antioxidant effects in streptozotocin induced diabetic rats. Food Chem Toxicol 2011; 49:2725-33. [DOI: 10.1016/j.fct.2011.08.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Revised: 07/25/2011] [Accepted: 08/04/2011] [Indexed: 01/08/2023]
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Gandhi GR, Ignacimuthu S, Paulraj MG, Sasikumar P. Antihyperglycemic activity and antidiabetic effect of methyl caffeate isolated from Solanum torvum Swartz. fruit in streptozotocin induced diabetic rats. Eur J Pharmacol 2011; 670:623-31. [PMID: 21963451 DOI: 10.1016/j.ejphar.2011.09.159] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 09/05/2011] [Accepted: 09/11/2011] [Indexed: 10/17/2022]
Abstract
Natural remedies from medicinal plants are considered to be effective and safe alternatives to treat diabetes mellitus. Solanum torvum Swartz. fruit is widely used in the traditional system of medicine to treat diabetes. In the present study methyl caffeate, isolated from S. torvum fruit, was screened for its efficacy in controlling diabetes in animal models. Antihyperglycemic effect of methyl caffeate was studied in normal glucose-fed rats. The effects of oral administration of methyl caffeate (10, 20 and 40 mg/kg) for 28 days on body weight, fasting blood glucose, plasma insulin, hemoglobin, glycated hemoglobin, total protein, hepatic glycogen and carbohydrate metabolism enzymes in streptozotocin induced diabetic rats were investigated. Histological observations in the pancreas and GLUT4 expression in skeletal muscles were also studied. Methyl caffeate at 40 mg/kg significantly prevented the increase in blood glucose level after glucose administration at 60 min in comparison to the hyperglycemic control group. In streptozotocin induced diabetic rats, methyl caffeate produced significant reduction in blood glucose and increased body weight. The levels and/or activities of other biochemical parameters were near normal due to treatment with methyl caffeate. Methyl caffeate treated diabetic rats showed upregulation of GLUT4 and regeneration of β-cells in the pancreas. These results substantiated that methyl caffeate possessed hypoglycemic effect, and it could be developed into a potent oral antidiabetic drug.
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Affiliation(s)
- Gopalsamy Rajiv Gandhi
- Division of Ethnopharmacology, Entomology Research Institute, Loyola College, Chennai 600 034, India
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