The ability of active fraction from Kappaphycus alvarezii (Doty) Doty Ex.P.C.Silva to Decrease Glucose Levels inhibit advanced Glycation End-Products (AGEs) Formation and RAGE (AGER) Gene Expression in Diabetic Rats

2020 ◽  
Author(s):  
Mae Sri Hartati Wahyuning ◽  
Evy - Yulianti ◽  
Sunarti - Sunarti

Abstract Background. Kappaphycus alvarezii (Doty) Doty ex P.C.Silva is a widely used seaweed that has antioxidant and antiglycation activities. The purpose of this study was to examine the ability of active fraction from Kappaphycus alvarezii to decrease glucose level and inhibit glycation process. Methods. This study used bioassay-guided fractionation through three stages of the extraction, partition, and fractionation processes that were monitored using Thin Layer Chromatography and BSA-Glucose test. Inhibition of glycation was known by calculating percentage of inhibition and IC50. Selected active fraction was used for in vivo tests using 24 Wistar male rats. Measurement of glucose levels used GOD-PAP method, while levels of glycated albumin (GA) and Nε- (carboxymethyl) lysine (CML) were measured using ELISA. Analysis of RAGE gene expression used qPCR. Results Glycation test showed a significant difference (p < 0.05) between all treatments. Chloroform extract showed higher percentage of inhibition (62.4 ± 3.45%) with lower IC50 (0.33 ± 0.01 mg/ml) compared to methanol extract (0.52 ± 0.03 mg/ml). Methanol-soluble extracts had a higher percentage of inhibition (51.10 ± 1.64%) with IC50 0.45 ± 0.05 mg/ml compared to methanol-insoluble extract (1.25 ± 0.05 mg/ml). Fraction II had a higher percentage of inhibition (53.37 ± 1.92%) with IC50 0.12 ± 0.01 mg/ml compared to other fractions. Selected active fraction reduced blood glucose by 1.3% and 5.2% and CML levels by 50.6% and 42.4% at concentrations of 0.17 and 0.255 mg/ml in diabetic rats. RAGE gene expression was lower in the diabetic rat groups treated with active fraction compared to untreated diabetic group. Conclusions The active fraction has ability for reducing blood glucose, antiglycation, or reducing CML levels, and RAGE gene expression.

2022 ◽  
Vol 22 (1) ◽  
Author(s):  
Evy Yulianti ◽  
Sunarti ◽  
Mae Sri Hartati Wahyuningsih

Abstract Background High glucose concentration increases the glycation process which leads to oxidative stress and inflammation, that can cause complications in diabetes. Several medicinal plants have been used in the treatment of diabetes and its complications. One of them is Kappaphycus alvarezii, an algae that has known antidiabetic abilities. This study aimed to examine the effect of K. alvarezii active fraction on plasma hydrogen peroxide (H2O2) and Tumor Necrosis Factor α (TNFα) levels, renal NADPH oxidase 4 (NOX4) and Nuclear Factor κ B (NFκB) gene expressions. Methods Active fraction was obtained from bioassay-guided fractionation with antiglycation ability. In vivo study was performed on twenty Wistar male rats. The level of H2O2 was measured using H2O2 Assay Kit, the Optical Density value measured using spectrophotometer at a wavelength of 405 nm. Plasma TNFα level was measured using ELISA. Renal NOX4 and NFκB gene expression was analyzed using qPCR. Results Active fraction significantly reduced plasma H2O2 but not TNFα levels. Furthermore, renal NOX4 gene expression was lower in the diabetic rat group treated with active fraction compared to the untreated group but not NFκB gene expression. Conclusions K. alvarezii active fraction has an activity to reduce plasma H2O2 as well as renal NOX4 gene expression. Therefore, this fraction could be developed as a potential candidate for diabetes treatment through oxidative stress mechanisms.


Author(s):  
Ganga Rajum ◽  
Hema Sundar Reddy T ◽  
Hema Sundar Reddy T

  Objective: The present study was aimed to evaluate antihyperglycemic and antihyperlipidemic activities of methanolic extract of Aristolochia bracteolata (MEAB) against dexamethasone-induced diabetic rat model.Methods: Methanolic extract was prepared by soxhlet extraction and was evaluated for antihyperglycemic and antihyperlipidemic activity using dexamethasone-induced model. The MEAB was administered orally at a dose of 200 and 400 mg/kg body weight glibenclamide was used as standard drug. On 0th and 11th day, blood was collected by retro-orbit plexus.Results: In this model blood glucose levels were determined on 0th and 11th days and MEAB significantly reduced the blood glucose levels in diabetic rats. The effect of MEAB on serum lipid profile such as total cholesterol (TC), triglycerides (TGs), low-density lipoprotein (LDL), very LDL (VLDL), and high-density lipoprotein (HDL) was also measured on the 11th day in the diabetic rats. Significant reduction in TC, TGs, LDL, and VLDL levels and improvement in HDL level were observed in diabetic rats.Conclusion: From the results, it was found that the MEAB possess antihyperglycemic and antihyperlipidemic activities.


Author(s):  
Eric Martial Deutchoua Ngounou ◽  
Yannick Dimitry Mang ◽  
Faustin Dongmo ◽  
Oumar Waassili Ibrahim Malla ◽  
Sélestin Sokeng Dongmo ◽  
...  

Aim and objective: Clerodendrum thomsoniae leaves are used in Cameroon to manage diabetes and its related disorders. The study aimed at investigating the antidiabetic effect of the aqueous extract on diet and dexamethasone induced diabetic rats. Methods: Young mature leaves of C thomsoniae were dried, finely powdered and submitted to aqueous extraction. The dehydrated extract was tested in rats at 3 doses 312.5, 625 and 1250 mg/kg based on the local use of the plant. The effect of the extract on the fasting blood glucose in normoglycemic rats and MACAPOS 1 type diet induced diabetic rats, using respectively glibenclamide and metformin as positive control groups, were investigated. Results: AECT significantly reduced blood glucose levels in normoglycemic rats (p<0.05) two hours after administration, from 83±2 mg/dL to 57.39±1.7 mg/dL with the dose of 1250 mg/kg. given the highest reduction rate of 30.86%. In normoglycemic rats 30 minutes after oral glucose overload, the maximum reduction rate was observed with glibenclamide 5 mg / kg and calculated at 49.90% followed by 36.39%, for the extract at 1250 mg / kg. After 30 days of repeated oral administration, AECT produced a reduction on blood glucose levels (p<0.05) in type 2 diabetic rats. This reduction in blood sugar was much more expressed with the dose of 1250mg/kg (73.52±0.71 mg/dL) followed by metformin 38mg/kg (70.21±0.89 mg/dL) as the normal control with no significant difference (P < 0.05). Conclusion: These results show that the antidiabetic activity of AECT can be explained by insulin stimulating effect, also give support to the traditional use of this plant.                   Peer Review History: Received 11 May 2021; Revised 17 June; Accepted 27 June, Available online 15 July 2021 Academic Editor: Dr. Asia Selman Abdullah,  Al-Razi university, Department of Pharmacy, Yemen, [email protected] UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency.  Received file:                Reviewer's Comments: Average Peer review marks at initial stage: 6.5/10 Average Peer review marks at publication stage: 8.0/10 Reviewer(s) detail: Dr. Terhemen Festus Swem, Department of Veterinary Physiology and Biochemistry, College of Veterinary Medicine, Federal University of Agriculture, Makurdi, Benue State, Nigeria, [email protected] Taha A.I. El Bassossy, Medicinal and Aromatic Plants Department, Desert Research Center, Cairo, Egypt, [email protected] Prof. Dr. Ali Gamal Ahmed Al-kaf, Sana'a university, Yemen, [email protected]   Similar Articles: ANTIDIABETIC AND ANTIHYPERLIPIDEMIC ACTIVITY OF DRACAENA CINNABARI BALF. RESIN ETHANOLIC EXTRACT OF SOQATRA ISLAND IN EXPERIMENTAL ANIMALS THE SCOPING REVIEW OF CHINESE AND WESTERN MEDICINE TREATMENT OF DIABETIC FOOT IN ASIA ANTIHYPERGLYCEMIC AND ANTI-OXIDANT POTENTIAL OF ETHANOL EXTRACT OF VITEX THYRSIFLORA LEAVES ON DIABETIC RATS EFFECTS OF EMODIN ON BLOOD GLUCOSE AND BODY WEIGHT IN TYPE 1 DIABETIC RATS


2014 ◽  
Vol 4 (2) ◽  
pp. 87 ◽  
Author(s):  
Henrietta Aritetsoma Ogbunugafor ◽  
Emmanuel Emeka Ilodigwe ◽  
Daniel Lotanna Ajaghaku ◽  
Chinwe Nonyelum Ezekwesili ◽  
Chike Samuel Okafor ◽  
...  

Background: Preventive measures that could slow down the rising incidences of diabetes mellitus are essential. The use of neglected local foods, which have effects on this chronic disease beyond basic nutrition as dietary controls, is desirable.Objective: The effect of Dioscorea dumetorum (Kunth) Pax (Dioscoreaceae) feed on satiety, weight, blood glucose, and insulin levels were investigated in streptozotocin-induced diabetic rats.Methods: Twenty adult male rats in four groups of five were used for the experiment. Three groups – D. dumetorum, glibenclamide, and standard pellet-fed rats were induced with diabetes by i.p. administration of 50mg kg-1 streptozotocin, while the fouth group (?) served as a non-diabetic control. D. dumetorum was fed at 15g daily for ten days before induction, and after induction, feeding continued. Glibenclamide was orally administered 5mg kg-1 daily. Both the untreated and non-diabetic rats were kept on standard rat pellets. Feed intake, weight, and blood glucose concentration were monitored daily, while insulin level was measured on day two and day six after inductions. Results: Average feed intake for non-diabetic rats was 15g for D. dumetorum per day, which dropped to 10.3g after induction of diabetes. Weight of normal non-diabetic rats consistently increased (142.61 ± 4.37g – 169.43 ± 8.61g) for the duration (17 days) of the experiment. The D. dumetorum-fed rats showed weight reduction of 5.4%, glibenclamide 4.0%, and untreated diabetic 6.15%. Non-diabetic rats blood glucose levels ranged between 70 to 100mg dL-1. Streptozotocin (STZ) (i.p.) administration increased blood glucose levels from 370% to 626% in the rats. D. dumetorum-fed rats showed reduced (p<0.05) blood glucose levels of 22.6%. Glibenclamide had 5.5% reduction (p<0.05). Insulin was absent in D. dumetorum-fed rats, whereas 0.95ng ml-1 of insulin was detected in glibenclamide-administered rats. These quantities were lower (p<0.001) than 1.40ng ml-1 in the non-diabetic rats. Conclusion: This study revealed that D. dumetorum tuber caused decreased hunger, weight reduction, and displayed hypoglycemic property in diabetic rats, even after heat treatment. Its probable mechanism of anti-hyperglycemic activity might not be through increased insulin secretion.Key words: D. dumetorum, streptozotocin-induced diabetes, weight, blood glucose, insulin.


2020 ◽  
Vol 16 (7) ◽  
pp. 1052-1063
Author(s):  
Jae-Hak Sohn ◽  
Joo Wan Kim ◽  
Jong-Min Lim ◽  
Go-Woon Jung ◽  
Sae Kwang Ku ◽  
...  

Background: The alleviating effects of diabetic nephropathy and hepatopathy of β-glucan were evaluated in this study. Objective: The anti-diabetic effects of β -glucan from Aureobasidium pullulans were assessed in a streptozotocin (STZ)-induced rat diabetes model at 62.5 and 125 mg/kg doses. In addition, the possibility of changes in the effects of β-glucan according to the severity of diabetes was also assessed at one dosage (62.5 mg/kg): severe, >360 mg/dL; slight, 130-200 mg/dL. Methods: Test articles were administered orally to STZ-induced diabetic rats from 21 days after STZ dosing for 4 weeks. Each of five or six female rats per group was selected using blood glucose levels at 21 days after STZ dosing. Changes in body weight were recorded during the study, along with blood glucose, blood urea nitrogen, creatinine, and serum aspartate aminotransferase and alanine aminotransferase levels. On the day of sacrifice, livers and kidneys were weighed and observed microscopically for changes in the percentage of degenerative regions and numbers of degenerative tubules in the kidney. Results: β-glucan showed no hypoglycemic effects in the STZ-induced diabetic rat model. However, it had favorable effects on decreasing diabetic complications related to diabetic nephropathy and hepatopathy. Conclusion: Based on the results of this study, it was concluded that β-glucan showed favorable effects in decreasing diabetic complications in STZ-induced rat diabetes model.


Author(s):  
Fadwa El-Ouady ◽  
Nadia Lahrach ◽  
Mohammed Ajebli ◽  
Ahmed E. Haidani ◽  
Mohamed Eddouks

Background: Diabetes mellitus is associated with high blood glucose levels due to insulin shortcoming (insulinopenia) or defective insulin action. The objective of the study was to investigate the antidiabetic and antioxidant effects of Foeniculum vulgare in streptozotocin-induced diabetic rat. Methods: The effects of the leaves aqueous extract (LAE) of Foeniculum vulgare (F. vulgare) at a dose of 10 mg/kg on blood glucose levels were evaluated in normal and streptozotocin (STZ)- induced diabetic rats. Histopathological changes were also evaluated in liver in STZ-induced rats. Results: Single oral administration of F. vulgare LAE reduced blood glucose levels 6 h after administration in STZ diabetic rats (p<0.0001). Furthermore, blood glucose levels were decreased in both normal (p<0.05) and STZ diabetic rats (p<0.0001) after the fifteenth day of treatment. During this test, both groups did not show any significant change in their body weight. Moreover, this aqueous extract improved oral glucose tolerance in diabetic rats and revealed a positive effect on liver histology. On the other hand, the extract used in this experiment showed an inhibitory concentration (IC50) of 50% of free radicals with a concentration of 43±1.19 µg/ml. While the synthetic antioxidant (BHT) had an IC50 equal to 22.67±2.17µg /ml. Conclusion: This study demonstrates the antihyperglycemic, hypoglycemic and antioxidant effects of the leaves of F. vulgare in normal and diabetic rats.


2015 ◽  
Vol 22 (08) ◽  
pp. 1048-1052
Author(s):  
Palwasha Abbasi ◽  
Abdul Rahim Memon ◽  
Sadia Tabassum Abbasi ◽  
Sadia Kazi ◽  
Shomail Siddiqui

Objectives: To investigate blood glucose regulaitng effects of CatharanthusRoseus (C.roseus) and Nigella sativa (N.sativa) in alloxan induced diabetic rats. Study Design:Experimental study. Place and Duration: Animal house Isra University Hyderabad. From Aprilto Novermber 2013. Methodology: 50 male rats were housed at normal température, 12 hourdark - light cycle with free access to chow and water. A single intraperitoneal bolus of alloxan(120 mg/kg) was given to induce diabetes mellitus. Glimepiride, C. roseus and N. Sativa wereadministered at doses of 0.1 mg/kg, 125 mg/kg and 50 g/kg respectively. Data was analyzed onSPSS version 21.0. Significant P - value was defined at ≤ 0.05. Results: C.roseus ad N.sativashowed blood glucose lowering potential but the effect was less when compared to glimepiride(P = 0.001). However, C. roseus was more effective compared to N.sativa (P = 0.001) inreducing blood glucose. Findings suggest that both C. roseus and N. sativa possess glucoseregulating potential. Conclusion: It is concluded that the C. roseus and N. sativa exert bloodglucose regulating effects in alloxan induced diabetic rat model.


2021 ◽  
Vol 67 (2) ◽  
pp. 9-16
Author(s):  
Mgs Irsan Saleh ◽  
Rachmat Hidayat ◽  
Geri Febriyanto ◽  
Nita Parisa

Summary Introduction: Karamunting (Rhodomyrtus tomentosa) is Indonesian native plant that contains high anti-oxidant compounds with the potential to suppress oxidative stress activity in cells. This study is the first research to specifically explore the role of the karamunting fraction in protecting kidney damage due to the formation of AGEs in the renal glomerulus in diabetes mellitus. Objective: This study aims to assess the impact of karamunting on blood glucose profile, HbA1c, insulin profile and kidney condition (AGEs expression, TNF-α and kidney histology) in diabetic rats. Methods: The karamunting extraction process was carried out by maceration with ethanol. Induction of diabetes mellitus was carried out using streptozotocin. Thirty male rats (Rattus norvegicus), Wistar strain weighing between 200–250 grams were the subject in this study. HbA1c, insulin, TNF-α, AGEs levels were evaluated in the kidney tissue. Histological assessment of the kidney was carried out. Results: Karamunting can improve blood glucose levels in diabetic rats. This improvement in blood glucose levels causes an improvement in the level of HbA1c. Administration of karamunting fraction can prevent AGEs deposition in renal tissue, which in turn will inhibits the inflammation and prevents further damage of kidneys. Conclusion: Karamunting fraction can improve blood glucose regulation so that it can prevent further damage and complications of kidney organs in diabetic rats.


2019 ◽  
Vol 28 (6) ◽  
pp. 84-92
Author(s):  
Edgar Romualdo Esquivel-Gutiérrez ◽  
Lilia Alcaraz-Meléndez ◽  
Roberto Hernández-Herrera ◽  
Amada Torres ◽  
Carmen Rodríguez-Jaramillo

Turnera diffusa (damiana) grows wild in Baja California Sur (BCS), Mexico. It is traditionally used for its aphrodisiac effects and for diabetes treatment. Two varieties (var.) have been identified: diffusa and aphrodisiaca. To evaluate the effects of water-ethanol extracts from both varieties, measurements on blood glucose, body weight, biochemical parameters, and cell blood counts were performed in a diabetic rat model. Oxidative stress was also evaluated when var. diffusa was administered. No significant reductions in blood glucose levels, in biochemical parameters, or in cell blood counts with any variety of damiana were observed; however, it helped diabetic animals to keep their body weight. Damiana var. diffusa did not modify the mitochondrial nitric oxide levels and superoxide dismutase activity; however, thiobarbituric acid reactive species diminished. In conclusion, damiana can be utilized reliably in the management of diabetes because of its antioxidant potential; it promoted body weight loss in healthy animals and helped to preserve it in diabetes.


Author(s):  
Omar Farid ◽  
Morad Hebi ◽  
Mohammed Ajebli ◽  
Ahmed EL Hidani ◽  
Mohamed Eddouks

AbstractBackground:(L.) is known as a medicinal plant with many beneficial effects, including those that can be used in the treatment of diabetes. The objective of the study was to investigate the antidiabetic effect of this plant in diabetic rat.Methods:This study investigated the effects of an aerial part aqueous extract (APAE) ofResults:Both single and repeated oral doses of APAE (5 mg/kg) produced significant reductions in the blood glucose levels in normal and STZ-induced rats. Oral glucose tolerance test results showed that, after the administration of 3 g/kg of glucose, RM APAE (5 mg/kg) improved the increase in blood glucose levels in normal rats at the 30th min (p<0.01) and 90th min (p<0.001).Conclusions:RM APAE exhibits a potent hypoglycemic effect in normal rats and an antidiabetic effect in STZ-induced rats. This finding supports the use of this plant in traditional Moroccan medicine for diabetes management.


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