Effect of Prosopis ruscifolia on incretin and insulin secretion in alloxan-induced hyperglycemic rats / Efecto de Prosopis ruscifolia sobre la secreción de incretina e insulina de ratas hiperglicémicas por aloxano

Background: Diabetes mellitus treatment is based on oral hypoglycemic agents or insulin. Medicinal plants constitute an option, and the leaves of Prosopis ruscifolia (Pr) were shown to be effective in reducing glycemia in hyperglycemic animals. Objective: In this paper, we report the effect of P. rusciofolia (Pr) on insulin and incretin secretion in alloxan-induced hyperglycemic rats. Methodology: The effective dose was selected, and four groups (n=10) of Wistar rats were used. Two groups with normal glycemia received water or Pr (75 mg/Kg, per os, p.o.), and two groups with hyperglycemia induced by alloxan (intraperitoneal, ip), received water or Pr (75 mg/Kg, p.o.) for 2 weeks. Oral glucose tolerance test, and incretin and insulin levels were measured at the end of the experimental period. Results: The results showed that extract promotes better tolerance to oral glucose overload, in addition to a statistically significant (p<0.001) increase in blood levels of incretin and insulin, compared to the hyperglycemic rats. Conclusion: It is concluded that the ethanolic extract of P. ruscifolialeaves has a hypoglycemic effect in hyperglycemic animals by a mechanism that involves the incretin-insulin system

Antecedentes: la diabetes mellitus es una enfermedad metabólica cuyo tratamiento se basa en el uso de agentes hipoglicemiantes orales o insulina. Una opción al tratamiento son las plantas medicinales y en ese sentido, estudios previos en animales con hojas de Prosopis ruscifolia (Pr) han demostrado efecto hipoglicemiante. Objetivo: en este trabajo se reporta el efecto de P. rusciofolia (Pr) en la secreción de insulina e incretina, en ratas hiperglicémicas por aloxano. Metodología: se emplearon cuatro grupos de ratas Wistar (n=10). Dos grupos con glicemia normal que fueron tratadas con agua Pr (75 mg/Kg, per os, p.o.) y dos grupos con hiperglicemia inducida por la inyección intraperitoneal de aloxano recibieron agua Pr (75 mg/Kg, per os, p.o.) durante dos semanas. Se midieron la tolerancia oral a la glucosa, y los niveles de incretina e insulina al final del periodo de experimentación. Resultados: se encontró que el extracto promueve una mayor tolerancia a la sobrecarga de glucosa, y además un incremento significativo (p<0.001) de los niveles de incretina e insulina en sangre, comparados al grupo de ratas hiperglicémicas. Conclusión: se concluye que e l estracto etanólico de las hojas de P. ruscifolia tienen efecto hipoglicemiante en animales hiperglicémicos por un mecanismo que incluye al sistema incretina-insulina

Protective effects and mechanism of icariin against vascular function in diabetic mice / 中国药科大学学报

@#To explore the effects and molecular mechanism of icariin on the vascular function of mice with type 1 diabetes induced by alloxan, type 1 diabetic mice model was established by intraperitoneal injection with 200 mg/kg alloxan.After oral administration with icariin (60, 120 mg/kg) daily for 2 weeks, blood glucose, body weight, food intake and water intake were detected.To evaluate the impact of icariin on the function of isolated vascular ring contraction and relaxation, thoracic aortas of mice were removed and the Ach-induced vascular ring relaxation, Phe-induced vascular ring contraction, SNP-induced vascular ring relaxation and KCl-induced vascular ring contraction response were detected.To further confirm the mechanism of icariin to improve vascular function, human umbilical vein endothelial cells (HUVECs) were induced by high glucose (HG) in vitro.Western blot was used to detect the effect of icariin on eNOS, p-eNOS, p38 MAPK and p-p38 MAPK expressions in HG-induced human umbilical vein endothelial cells (HUVECs).The results indicated that icariin significantly ameliorated the weight loss and dampened the increase in water intake of the diabetic mice.Meanwhile, icariin had a certain ameliorative effect on blood glucose and food intake without significant difference.The results of isolated thoracic aortas vascular rings contraction and vasodilation function indicated that icariin significantly improved Phe-induced vascular contraction and Ach‐induced vascular relaxation.Meanwhile, icariin had a certain ameliorative effect on KCl-induced vascular contraction response without significant difference.However, no significant change was observed on endothelium‐independent vascular rings relaxation response induced by SNP after treatment with icariin.Results of Western blot showed that icariin inhibited the expression of p-p38 MAPK and induced expression of p-eNOS in the high glucose-induced HUVECs cell model.Therefore, icariin may attenuate alloxan-induced type 1 diabetic mice vascular diastolic function by inhibiting expression of p-p38 MAPK and inducing expression of p-eNOS.

The Effects on Offspring of Diabetes Mellitus Induced by Chemical Agents in Rats with Advanced Pregnancy

ABSTRACT Background: Gestational diabetes mellitus is an increasingly frequent metabolic disorder that is important for both baby and mother. New studies on the development and treatment of the disease are required. Objective: To investigate the effects on offspring's survival and the biochemical values of diabetes mellitus, induced by different doses of two chemical agents among 35 rats with advanced pregnancy. Methods: The rats were randomly divided into five groups, with the rats in Group 1 as the control group. Alloxan was administered intraperitoneally at doses of 40 and 60 mg/kg in Groups 2 and 3, respectively. Streptozotocin was injected intraperitoneally at doses of 40 and 60 mg/kg in Groups 4 and 5, respectively. Deliveries were monitored, and offspring numbers, survival rates and congenital anomalies were recorded. At the end of the study, blood was drawn from one female offspring in each group; glucose, total protein, albumin, triglyceride, cholesterol, calcium and phosphorus levels were measured, and inter-group comparisons were made. Diabetic agents administered at various doses prolonged the duration of pregnancy. Results: Offspring's deaths were most frequent in the alloxan groups. The number of offspring mortalities in the streptozotocin group was higher than that of the control group, but lower than that of the alloxan group. No differences in glucose, total protein, albumin, triglyceride, cholesterol, calcium and phosphorus levels were observed between the groups. These results indicate that the female offspring, born from rats with gestational diabetes mellitus induced by different chemicals, were only clinically affected. No effect of the type of chemicals on the results was found. Conclusion: The use of streptozotocin in the studies on female offspring born from rats with gestational diabetes mellitus is recommended.

Ameliorating effect of Malva Neglecta on hyperglycemia and hyperlipidemia in diabetic rats

The plant, Malva neglecta wallr., is widely consumed for medicinal and nutritional purposes. The current study was carried out to assess the hypoglycemic and antihyperlipidemic potential of aqueous methanolic extract of M. neglecta. Chemical evaluation of the extract was performed by high pressure liquid chromatography. Oral glucose tolerance test (OGTT) was done in diabetic rats pre-exposed to 250, 500 and 750 mg/kg plant extract via the oral route. For hypoglycemic and biochemical study, the same therapy was administered to alloxan induced diabetic rats for 14 days. The standard control group received Glibenclamide (5 mg/kg). Ferulic acid, p-coumaric acid and other phenolic acids were detected and estimated in the extract. Administration of the plant extract significantly reduced blood glucose level in diabetic rats subjected to OGTT. The plant extract lowered the fasting blood glucose and alpha amylase, and prevented the damage to pancreas. It also corrected dyslipidemia in diabetic animals following 14 days therapy. Hence, this experimental study establishes the fact that M. neglecta exhibited significant antidiabetic and antihyperlipidemic activities in alloxan induced diabetic rats.

Efecto hipoglicemiante de Moringa oleifera (moringa) comparado con smallanthus sonchifolius (yacón) en Rattus norvegicus con diabetes mellitus inducida / Hypoglycemic effect of Moringa oleifera (moringa) compared with Smallanthus sonchifolius (yacon) on Rattus norvegicus with induced diabetes mellitus

RESUMEN Objetivo: Comparar el efecto hipoglicemiante del extracto acuoso de Moringa oleifera (moringa), Smallanthus sonchifolius (yacón) y metformina en Rattus norvegicus, variedad albina, con diabetes mellitus inducida. Materiales y métodos: Estudio preclínico, experimental controlado y aleatorizado. La diabetes se indujo por vía intraperitoneal con una dosis de aloxano a 130mg/kg de peso vivo (PV); se emplearon 24 Rattus norvegicus, variedad albina, machos, cepa Holfzman (seis por grupo). Se dividieron de la siguiente manera: grupo control (sin tratamiento), grupo metformina (14mg/kg PV), grupo M. oleifera (200mg/kg PV), y grupo S. sonchifolius (140 mg/kg PV), los tratamientos fueron administrados mediante sonda orogástrica durante 15 días. Los niveles de glicemia fueron determinados usando un glucómetro electrónico Accu-Chek® Instant (Roche). Resultados: Se observó reducción de la glicemia en los tratamientos: M. oleifera (p=0,009), S. sonchifolius (p=0,002) y metfotmina (p=0,002), en 313 mg/dL, 281,5 mg/dL y 415 mg/dL, respectivamente. En cuanto a la comparación de la glicemia en los grupos tratados y control, se observó que a las 24 horas y cuatro días de tratamiento no hubo diferencia (p>0,05); mientras que al octavo (p<0,05) y décimo quinto día (p<0,01) los grupos tratados tuvieron menor glicemia respecto al control, pero similares entre ellos. Conclusión: El extracto acuoso de S. sonchifolius y de M. oleifera, y la metformina presentaron similar efecto hipoglicemiante en ratas de experimentación con diabetes inducida.

ABSTRACT Objective: To compare the hypoglycemic effect of the aqueous extract of Moringa oleifera (moringa), Smallanthus sonchifolius (yacon) and metformin on Rattus norvegicus, albino variety, with induced diabetes mellitus. Materials and methods: Preclinical, experimental, controlled and randomized study. Diabetes was induced intraperitoneally with a dose of alloxan at 130 mg/kg. A total of 24 male Rattus norvegicus, albino variety, Holfzman strain (6 per group) were used. They were divided as follows: control group (no treatment), metformin group (14 mg/kg), M. oleifera group (200 mg/kg), and S. sonchifolius group (140 mg/kg), treatments were administered via orogastric tube for 15 days. Glycemia levels were determined using an Accu-Chek® Instant electronic glycometer (Roche). Results: Decreased glycemia was observed in the treatment groups: M. oleifera (p = 0.009), S. sonchifolius (p = 0.002) and metformin (p = 0.002), by 313 mg/dL, 281.5 mg/dL and 415 mg/dL, respectively. When comparing glycemia in the treated and control groups, no difference was observed (P > 0.05) at 24 hours and four days of treatment; while at the eighth (P < 0.05) and fifteenth day (P < 0.01) the treated groups had lower glycemia than the control group, but it was similar among them. Conclusion: The aqueous extract of S. sonchifolius, M. oleifera, and metformin presented similar hypoglycemic effect in experimental rats with induced diabetes.

Hematological Changes and Antidiabetic Activities of Colocasia esculenta (L.) Schatt Stem Tuber Aqueous Extract in Alloxan Induced Diabetic Rats

Managementofbloodglucoselevelisthehallmarkinthetreatmentofdiabetes.MuchworkhasnotbeendoneonthemanagementofdiabetesusingthestemtuberextractofColocasiaesculenta.TheobjectiveofthisstudywastoevaluatetheantihyperglycemicandhematologicalparameteronColocasiaesculentaaqueousstemextractinalloxaninduceddiabeticrats.Sixty(60)maleratswereusedinthestudy.Sevendaysofacclimatization,theratsweredividedrandomlyintosixgroupsoffiveineachgroup.Group1:Servedasnormalcontrol,Group2:Diabeticcontrolgroup(negativecontrol),Group3:Diabeticgroupand“Glucinorm-M80”(positivecontrol),Group4:Diabeticgroupandextractat200mg/kgbodyweight,Group5:Diabeticgroupandextractat400mg/kg,Group6:Diabeticgroupandextractat600mg/kg.Diabeteswasinducedinalbinoratsby intraperitonealinjectionofalloxanatasingledoseof120mg/kgbodyweightingroups2to6afterstarvingthemfor24hrs.Theanimalsweregivenfeedandwateradlibitum.ThealbinoratswereadministeredfortwentyeightdayswiththeaqueousColocasiaesculentastemtuber,afterwhichtheywerefastedovernight,anaesthetizedwithchloroformandsacrificed.Theresultshowedthattherewasasignificantincrease(p<0.05)inmeanbodyweightofthepositivecontrolandthetreatmentgroups(200mg/kgto600mg/kg)whencomparedwiththenegativecontrolwhichhasasignificantdecrease(p<0.05)inmeanbodyweight.Theresultalsoshowedasignificantincrease(P<0.05)intheconcentrationsofRBC,PCV,HB,whilePLTandMCHshowedsignificantdecrease(P<0.05)inthetreatmentgroupsandnegativecontrolgroupwhencomparedwiththenormalcontrolgroup.Alsotherewasanosignificant(P<0.05)differenceinMCHCofthetreatmentgroupswhencomparedwiththecontrolgroupandnegativecontrolgroup.Alsotherewasasignificantdifferenceinglycosylatehemoglobinofthetreatmentgroupswhencomparedwiththecontrolgroupandnegativegroup.ThisstudyhasdemonstratedthataqueousstemtuberextractofColocasiaesculentahasasignificantincreaseonbodyweightwhichmayhavearoleofimprovingthestatesofpossibleweightlossfollowingcomplicateddiabetes.Also,aqueousstemtuberextractofColocasiaesculentahasanameliorativeeffectonsugarlevelandsomehematologicalparametersofalloxaninduceddiabeticratsshowingeffectivediabeticcontrolandmanagementofdiabetes

¿Los protocolos experimentales son un símil real de la diabetes humana? / Are experimental protocols an authentic simile of human diabetes?

Resumen Para el estudio de la diabetes se dispone de diversas estrategias metodológicas en modelos animales, tales como, técnicas quirúrgicas, modificaciones dietéticas, incluso manipulación genética y la administración de fármacos específicos, por su toxicidad. En animales, la diabetes experimental se logra con el uso de fármacos, como la aloxana o la estreptozotocina, los cuales producen daño irreversible en las células β-pancreáticas, aunque causan una alta mortalidad, debido a la cetosis asociada al daño agudo de estas células pancreáticas. El objetivo de este trabajo fue analizar los protocolos farmacológicos y otras estrategias disponibles, para determinar si la diabetes experimental realmente emula la diabetes humana. La diabetes es un proceso progresivo y crónico, en el que la mayor parte de las alteraciones clínicas son consecuencia, en el largo plazo, de alteraciones micro y macrovasculares. Por ello, es conveniente diferenciar entre los efectos de una hiperglucemia aguda, con aquellos que se observan cuando la hiperglucemia se prolonga a lo largo del tiempo, a fin de establecer analogías, entre el modelo experimental animal, con el síndrome diabético humano, mediante datos de laboratorio y de tipo clínico, de uso habitual en el diagnóstico y manejo de la diabetes humana.

Abstract For the study of diabetes, several methodological strategies use animal models. Such methodologies involve surgical techniques, diet modifications, some genetic manipulations and specific toxic drugs. The experimental production of diabetes in animal models use the administration of alloxan or streptozotocin and these drugs produce irreversible damage to pancreatic β-cells. However, its use is associated to a ketosis high mortality rate due to the acute damage of pancreatic cells. The aim of this review consisted in the analysis of the pharmacological diabetes production protocols as well as other available strategies, in order to elucidate which is potentially the ideal protocol that emulates human diabetes. Diabetes is a progressive and chronic process, in which most of the clinical alterations are a long-term consequence of micro and macrovascular alterations. Therefore, it is convenient to establish a difference between the effects of acute hyperglycemia, with those effects observable when hyperglycemia is present over the long-term in order to reach enough analogies between the animal experimental model with the human diabetes syndrome, through the use of laboratory and clinical indicators commonly employed for the diagnoses and management of human diabetes.

The Anti-Diabetic Effect of Hibiscus Cannabinus Extract on the Submandibular Salivary Gland of Alloxan-Induced Diabetic Albino Rats

Objectives: This study aims to investigate the anti-diabetic effect of Hibiscus cannabinus Linn leaf extract on thehistological structure of the submandibular salivary gland in alloxan-induced diabetic albino rats. Materials andMethods: Three groups consisting of 10adult male albino rats each were used in this experiment. Group, I servedas the control, whereas group II consisted of alloxan-induced diabetic rats. Finally, in group III, each alloxaninduced diabetic rat received an oral daily dose of methanolic extract of Hibiscus cannabinus Linn leaves equalto 400mg/kg body weight for four weeks after diabetes induction, using the same dose and like that of group II.In all groups, the rats were sacrificed four weeks after the experiment was initiated. The submandibular salivaryglands were dissected, prepared, and stained with H&E for light microscopy examination. Results:Histopathological examination of the submandibular salivary glands in group II (the diabetic group) revealed aloss of the standard glandular architecture involving the entire structure of the glands, including the acini, ductsystem, connective tissue stroma, and blood vessels. Also, severe degenerative changes with an accumulation ofnumerous intracytoplasmic vacuoles affecting the serous acini and duct system were observed as compared togroup 1. Most of these alterations and degenerative changes disappeared or were markedly decreased in groupIII (the diabetic group treated with Hibiscus cannabinus Linn extract). Conclusions: Hibiscus cannabinus Linnleaf extract had a noticeable anti¬diabetic effect on alloxan-induced diabetic alterations in the submandibularsalivary glands of rats. Hence, Hibiscus cannabinus Linn leaves may be beneficial as a dietary supplement forreducing diabetes complications. Also, Hibiscus cannabinus Linn leaf extract can serve as a promising herbalmedicine due to its effectiveness and safety.

Effects of probiotics supplementation on skin wound healing in diabetic rats / Suplementação perioperatória com probióticos na cicatrização de feridas cutâneas em ratos diabéticos

ABSTRACT Background: Chronic wounds in patients with Diabetes Mellitus often become incurable due to prolonged and excessive production of inflammatory cytokines. The use of probiotics modifies the intestinal microbiota and modulates inflammatory reactions. Aim: To evaluate the influence of perioperative supplementation with probiotics in the cutaneous healing process in diabetic rats. Methods: Forty-six rats were divided into four groups (C3, P3, C10, P10) according to the treatment (P=probiotic or C=control, both orally administered) and day of euthanasia, 3rd or 10th postoperative days. All rats were induced to Diabetes Mellitus 72 h before starting the experiment with alloxan. Supplementation was initiated five days before the incision and maintained until euthanasia. Scalpel incision was guided by a 2x2 cm mold and the wounds were left to heal per second-intention. The wounds were digitally measured. Collagen densitometry was done with Picrosirius Red staining. Histological parameters were analyzed by staining by H&E. Results: The contraction of the wound was faster in the P10 group which resulted in a smaller scar area (p=0.011). There was an increase in type I collagen deposition from the 3rd to the 10th postoperative day in the probiotic groups (p=0.016), which did not occur in the control group (p=0.487). The histological analysis showed a better degree of healing in the P10 group (p=0.005), with fewer polymorphonuclear (p<0.001) and more neovessels (p=0.001). Conclusions: Perioperative supplementation of probiotics stimulates skin wound healing in diabetic rats, possibly due to attenuation of the inflammatory response and increased neovascularization and type I collagen deposition.

RESUMO Racional: Feridas crônicas em pacientes diabéticos muitas vezes se tornam incuráveis devido à produção prolongada e excessiva de citocinas inflamatórias. A utilização de probióticos modifica a microbiota intestinal e modula reações inflamatórias. Objetivo: Avaliar a influência da suplementação perioperatória com probióticos no processo de cicatrização cutânea em ratos diabéticos. Método: Quarenta e seis ratos foram divididos em quatro grupos (C3, P3, C10, P10) conforme tratamento (P=probiótico ou C=controle, via oral) e dia de eutanásia: 3o ou 10o dia de pós-operatório. Todos os ratos foram induzidos ao diabete melito 72 h antes de iniciar o experimento com aloxana. A suplementação foi iniciada cinco dias antes da operação e mantida até a eutanásia. Foi realizada incisão com bisturi guiada por molde de 2x2 cm e a ferida foi deixada para cicatrizar por segunda intenção. As feridas foram medidas digitalmente. A densitometria de colágeno foi determinada com coloração picrosirius red. A histologia foi avaliada por coloração com H&E. Resultados: A contração da ferida foi maior no grupo P10, o que resultou em menor área cruenta (p=0,011). Houve aumento do colágeno tipo I do 3o para o 10o dia de pós-operatório no grupo P10 (p=0,016), o que não ocorreu no grupo controle (p=0,487). A análise histológica mostrou melhor grau de cicatrização no grupo P10 (p=0,005), com menos polimorfonucleares (p<0,001) e mais neovasos (p=0,001). Conclusões: A suplementação perioperatória de probióticos promove aceleração da cicatrização cutânea em ratos diabéticos, possivelmente por atenuar a resposta inflamatória e aumentar a neovascularização e a deposição de colágeno tipo I.

Evaluation of alloxan on induction of diabetes in albino rats

Background: Alloxan-induced diabetes model is used as a “study tool” to elucidate the pathophysiology of the disease and much more as a “search engine” for antidiabetic compounds with better therapeutic characteristics. It was the first agent used in the category of chemically induced diabetes to create a model of insulin dependent diabetes mellitus. Other chemicals being streptozocin, dexamethasone, insulin antibodies-induced diabetes.Methods: Albino rats were divided into four groups with ten rats in each group. Alloxan monohydrate 2%, solution which was dissolved in 0.9% of sodium chloride (normal saline) as a diluent and given intraperitoneally to rats and blood glucose estimation made by using glucometer. Total 40 albino rats were taken and divided into 4 groups. 10 rats receiving normal saline were grouped as Group A, 10 rats received alloxan at a dose of 150 mg/kg as Group B, 10 rats received alloxan at a dose of 160 mg/kg as Group C and 10 rats received alloxan at a dose of 170 mg/kg as Group D.Results: Highest rate of mortality and alopecia were noted in group D receiving alloxan at a dose of 170 mg/kg whereas highest percentage of fluctuation in fasting blood glucose range was seen in group C receiving alloxan at a dose of 160 mg/kg.Conclusions: Such unpredictable response shows that alloxan is not ideal drug for induction of diabetes in experimental animal. Mortality, fasting blood glucose returning to non-diabetic range and alopecia are the chief drawbacks.

Pharmacological Evaluation Of Antidiabetic And Diuretic Activity Of Hydro-Alcoholic Extract Of Anogeissus Latifolia Bark

The objective of the present investigation was to study the antidiabetic and diuretic potential of Anogeissus latifolia (A. latifolia) bark in experimental rats. The A. latifolia bark was extracted with hydro-alcoholic solvent by cold extraction method. Acute toxicity study was performed according to OECD 425 guidelines for hydro-alcoholic extracts of A. latifolia bark (ALBE). The dose of 150 mg/kg p.o. and 300 mg/kg, p.o. of ALBE was selected for further studies. Animals were prepared diabetic by administration of alloxan (120 mg/kg, i.p.). The albino rats were divided in to five groups for oral glucose tolerance test (OGTT) and alloxan induced anti diabetic model with six animals in each group. Diabetic animals were treated with hydro-alcoholic extract of A. latifolia bark for 20 days. The blood glucose level was estimated according to standard procedures. Diuretic activity hydro-alcoholic extracts of A. latifolia was evaluated by Lipshitz method. The result shows that hydro-alcoholic extract from bark of Anogeissus latifolia 300 mg/kg (ALBE-II) shown significant hypoglycemic activity as compared to glibenclamide and diabetic group. The ALBE does not exhibit significant diuretic activity which is considered as positive marker in diabetic phenomena. Hence in present study extract of A. latifolia posses antidiabetic activity. This study may be benchmark in future to use of this drug scientifically.

Phytochemical Composition and Biochemical Studies of the Aqueous Leaf Extracts of Brillantaisia guianensis P. beauv on Alloxan Treated Wistar Albino Rats

The present study was carried out on the phytochemical composition and biochemical studies oftheleafextract ofBrillantaisia guinensis peuvon alloxan treated Wistar albinorats.The experimental rats were administered with 80mg/kgbodyweight of alloxan,viathetailvein.After five days treatment with alloxan, thetreatment with the extractscommenced. Extracts wereadministeredorallyat100,200and 300mg/kg bw(both tonormal andtreated rats) for twenty-one days.Metformin,which served as a standard drug was administered at50mg/kg. Chromatographicanalysisof thephytochemical content of the leaf extract, revealed the presence of flavonoids (30.7mg/100g), saponins(50.6mg/100g), phytosterol (6.22mg/100g), tannins (7.50mg/100g) and glycosides(29.3mg/100g). Comparedtotest and normalcontrol,the extractsdose-dependentlyand significantlylowered(P<0.05) plasmaglucose and triglycerides, during the experimental period. Thisstudy revealedthe presence of pharma cologically bioactive compounds inthelea fextract and showed that the leaf extract had a dose-dependent hypoglycemic and hypotriglyceridemic effect on the Wistaralbino rats. The findings suggest a likely protective role of the extracts against hyperglycemia and hypertriglyceridemia thereby useful in the treatment and management of diabetes mellitus, obesity and other related cardiovascular diseases.

Analysis Of Metformin On Endogenous Antioxidants And Oxidative Stress In Mice Brain Tissue Of Alloxan-Induced Diabetes

Diabetes has become a serious threat to mankind, as it is found in all parts of the world. Alloxan induced diabetic mice were treated by metformin to study the impact of oxidative stress and endogenous antioxidants. Due to the establishment of diabetes, the oxidative stress indicators were found to be positively correlated with the elevation in the levels of endogenous antioxidants. Whereas, in metformin-treated diabetic mice, the data revealed the correction of diabetes by lowering of blood glucose level along with body weight. But the levels of endogenous antioxidants were not recorded to increase except GST. It shows that under in vivo system level of oxidative stress increases due to the metformin. The data revealed that metformin treatment of mice, however, manage the glucose level but not effective in controlling oxidative stress.

Oral Ulcer Healing after Treatment with Distilled Liquid Smoke of Coconut Shell on Diabetic Rats

Background: Distilled liquid smoke from coconut shell(Cocos nucifera L.) by pyrolysis process with final0 0temperature 400 C and then distilled in 120-150 C. Thecharacteristics of distilled liquid smoke are yellow3liquid, with acidity 2.39 and density 1.0643 g/cm . Themajor identified compounds arephenol (36.6%), 2-methoxyphenol (guaiacol) (25.2%), furfural (17.8%),2-methoxy-5-methylphenol (5.2%) and 4-ethyl-2-methoxyphenol (EMP) (3.5%) with 28 other minorconstituents by GCMS. Aim and Objectives: Distilledliquid smoke was examined to investigate its potentialtherapeutic to oral ulcer healing and diabetic conditionon the rat. Furthermore, the clinical oral ulcer healingwas evaluated based on ulcer size and diabetic wasevaluated based on Fasting Blood Glucose (FBG) andbody weight changes. Material and Methods: Diabeteswas induced by alloxan. Seventy-two hours afterinjection, the diabetic condition was confirmed withFBG of >200mg/dl, then the labial fornix anterior wasinjured to induce oral ulcer using round steel blade.Results: The clinical oral ulcer healing was improvedafter treatment with distillated liquid smoke comparedto benzydamine hydrochloride and aquadest sterile forthree days (p=0.005) and seven days (p=0.000).Treatment for seven days with distilled liquid smokeshowed significant improvement of the body masschanges compared to benzydamine hydrochloride(p=0.008) and aquadest sterile (p=0.002). There wasno improvement of FBG after treatment with distilledliquid smoke (p=0.152). Conclusion: Treatment withdistilled liquid smoke coconut shell can improved oralulcer healing and body weight changes, but not FBGchanges

Evaluation of the Antioxidant and Anti-diabetic Effect of Mucuna puriens Extract

Aims: To investigate the scientific basis for the anti-diabetic and antioxidant activity of Mucuna pruriens (Fabaceae) leaf ethanolic extract using alloxan-induced diabetic rats, DPPH and ABTS assay. Place and Duration of Study: Department of Chemistry/Biochemistry Federal University Ndufu Alike, Ebonyi State, Nigeria between October 2013 and May 2014. Methodology: The polyphenol content was determined using Folin-Ciocaltu method and their linear relationship with antioxidant activity was evaluated using linear regression analysis. The antioxidant activity was determined using 1, 1-Diphenyl, 2-picrylhydrazyl (DPPH) and (2, 2-azinobis-(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) free radical assay. The active ingredients in the ethanolic extract were isolated using HPLC method. Also the ant-diabetic activity was determined in vivo using alloxan-induced diabetic wister rats. Results: Ethanol extract showed the highest phenolic content as well as highest antioxidant activity. A strong relationship was found between phenolic contents and antioxidant activity. The HPLC analysis indicates the presence of gallic acid, caffeic acid, p-coumaric acid, quercetin and (+)-catechin. The ethanolic extract at the concentration of 400 mg/kg significantly (P<0.001) increased the intracellular antioxidant enzymes and reduced the elavated serum lipids and showed more active than the reference drug (metformin). Conclusion: Based on the obtained result, the antioxidant and anti-diabetic activity demonstrated by Mucuna pruriens leaf extracts provide good evidence to support the traditional use of this plant in treatment of diabetics.

Evalution of Anti-Diabetic Potential of Aqueous Extract of “Luffa cylindrica” (Native Sponge/Sponge Gourd) Leaf and Seed on Alloxan Induced Diabetic Wistar Rats

The study was carried out to evaluate the anti-diabetic effect of Luffa cylindrical (nativesponge/spongegourd) seed and leaf extracts in alloxan-induced diabetic rats. Sixteen experimental rats were divided into four groups of four rats each: a, diabetic control; b, normal control; c, diabetic rats treated with seed extract (400mg/kg) and d, diabetic rats treated with leaf extract (400mg/kg). The groups A, C and D rats were induced with diabetes intraperitoneally with alloxan (150mg/kg bw). Phytochemical screening was carried out on the plant seed and leaf extracts and the following biochemical tests were carried out: blood glucose, serum lipid profile, serum alanine aminotransferase, serum aspartate aminotransferase, serum alkaline phosphatase, total protein, albumin, creatinine, urea, uric acid and some electrolytes likeNa+, K+, HCO3-, and Cl-the administration of alloxan to experimental rats resulted in an increased level of most biochemical parameters; blood glucose, serum alanine aminotransferase, serum aspartate aminotransferase and serum alkaline phosphatase, serum total cholesterol, triglyceride, low density lipoprotein, creatinine, urea and uric acid. Luffa cylindricaseed and leaf extractswas administered to groups c and d diabetic rats respectively for two weeks, results werecompared with normal control and diabetic control rats these parameters were found to be significantly (p<0.05) high in the diabetic groups than in the normal control groups. Treatment with the plant extract significantly (p<0.05) reduced elevated blood levels of glucose, cholesterol, triglyceride, alkaline phosphatase, amylase, aspartate aminotransferase, alanine aminotransferase, creatinine, urea, uric acid associated with alloxan-induced diabetic rats. The plant tested positive for alkaloids, flavonoids, saponins and tannins, negative for cardiac glycosides, phenols, resins, terpenes and steroids. Extracts of Luffa cylindricaseed and leaf has shown to have anti-diabetic and anti-lipidemic effects generally on alloxan induced diabetic rats. The study’s findings has shown that the plant possess hypoglycaemic and hypolipidaemic property and has supported the traditional use of Luffa cylindricaplant in the management of diabetes and its complications.

Effect of turmeric on alloxan induced diabetes mellitus in albino rats

Background: Diabetes mellitus is a chronic metabolic disorder of glucose metabolism characterised by hyperglycaemia. Long standing diabetes mellitus leads to various complications affecting multiple organ systems. Management of diabetes mellitus includes lifestyle modification and pharmacotherapy. Pharmacotherapy of diabetes mellitus includes a wide variety of drugs that help in achieving adequate glycaemic control. Anti-diabetic medications are however associated with several adverse effects. Phytochemicals are being used extensively for the treatment of various diseases. Use of phytochemicals would minimize adverse effects due to various anti-diabetic drugs and improve patient compliance. In the present study, authors studied the effect of turmeric on alloxan induced diabetes mellitus in albino rats.Methods: Albino Wistar rats of either sex weighing 180 - 250grams were utilized for the present study. Diabetes mellitus was induced by intraperitoneal administration of alloxan. Ethanolic extract of turmeric was administered to diabetic rats daily orally for duration of 28 days. Blood glucose levels were monitored using glucometer before and after intervention with turmeric.Results: Statistically significant reduction in mean blood glucose levels (p value <0.05) was seen after intervention with turmeric in diabetic rats. There was a significant reduction in mean blood glucose levels.Conclusions: Ethanolic extract of turmeric showed antihyperglycemic effect in diabetic rats.

Antidiabetic activity evaluation of Onobrychis species on alloxan-induced diabetic mice

In the current study, four Onobrychis species, O. albiflora Hub.-Mor., O. argyrea Boiss. subsp. argyrea Boiss., O. galegifolia Boiss., and O. tournefortii (Willd.) Desv. were collected from Anatolia to be evaluated for their antidiabetic activities. Methanol water extracts of the aerial parts were used for experiments. An alloxan-induced diabetic mice test model was used. Phytochemical analysis of the tested extracts was investigated using the HPLC method. The highest activity was observed with treatment of O. albiflora aerial part extract. Significant decrements were detected in the blood glucose levels as follows: 180.83±47.48 and 252.83±50.47mg/dL at 100 mg/kg and 200 mg/kg doses of O. albiflora, respectively, when compared to the isotonic saline solution control group, eliciting a blood glucose level of 494.20±27.32. Among the tested standard compounds, rutin and isoquercetin were detected in the examined species. The highest amount of rutin (1.1981±0.0017%) and isoquercetin (0.7318±0.0197%) were found in O. albiflora and O. argyrea subsp. argyrea, respectively. Antidiabetic activities of the tested Onobrychis species seem to indicate a possible correlation with their rutin and isoquercetin contents. Therefore, rutin and isoquercetin may be the antidiabetic compounds that contribute to the antidiabetic activity of the tested Onobrychis species.

Antidiabetic activity of aqueous extract of Sigesbeckia orientalis (St. Paul's Wort) in alloxan-induced diabetes model

The current study evaluated antidiabetic and antihyperlipidemic activities of aqueous extract of Sigesbeckia orientalis L. (St. Paul's Wort) (AESO) in an alloxan-induced diabetic rat model. Following OECD guidelines safe doses of AESO were assessed in rats for the main study. Serum/bood glucose, α-amylase, and lipids levels and histopathological evaluations were conducted to assess antidiabetic and associated antihyperlipidemic efficacies of AESO. AESO was found to be safe up to the dose of 2000 mg/kg. Significant (p < 0.05) reduction in glucose and lipids (total cholesterol, triglycerides, low-density lipoproteins) levels was observed in AESO treatment groups. Serum α-amylase, high-density lipoproteins, and total body weight was increased significantly (p < 0.05) in diabetic rats treated with AESO. Histopathological data showed improvement in hepatocyte and pancreatic β-cells islets architecture. HPLC analysis identified quercetin, gallic acid, vanillic acid, p-coumaric acid, m-coumaric acid and cinnamic acid in AESO which are suggested to be responsible for observed antihyperglycemic and antihyperlipidemic attributes. Further studies to standardise the extract and evaluation of safety profile in long-term toxicity studies are recommended for safe and effective antidiabetic nutraceuticals development.

Insulin favors acute inflammatory reaction in alloxan-diabetic tilapia during infectious aerocystitis / Insulina favorece a reação inflamatória aguda em tilápia do Nilo aloxano-diabéticas durante aerocistite infecciosa

In vertebrates, the inflammatory reaction is responsible for modulating the initial nonspecific defense until specific immunity is acquired. In this context, numerous studies in mammals have demonstrated the participation of insulin in the inflammatory response, favoring cell proliferation and the migratory capacity of endothelial cells, vascular smooth muscle cells and monocytes, as well as mediating the expression of pro-thrombotic and pro-fibrotic factors. However, little is known about the effect of this peptidic hormone on the inflammatory reaction in teleostean fish. In order to evaluate the participation of insulin in the acute inflammatory response of Nile tilapia, Oreochromis niloticus, during aerocystitis induced by Aeromonas hydrophila, and 48 aloxane-diabetic tilapia were used, constituting two groups: diabetics treated with insulin and diabetics without treatment. After six, 24, and 48 hours of inflammatory stimulation, tilapia were submitted to deep anesthesia for euthanasia and necropsy, and thus, obtaining exudate and harvesting of the swim bladder for analysis of the inflammatory reaction. Based on this premise, the present study demonstrated the participation of insulin in the acute inflammatory reaction of alloxan-diabetic tilapia by favors the cellular accumulation in the exudate, the proliferative effect of fibrous tissue and neovascularization in the inflamed site. Such findings reinforce the old hypothesis that insulin plays an important role in the innate immune response during acute inflammatory reaction, being an important pro-inflammatory hormone. However, Nile tilapia proved to be a promising experimental model for studies and advances in research involving diabetes mellitus.(AU)

Em vertebrados, a reação inflamatória é responsável por modular a defesa inicial não-específica, até que imunidade específica seja adquirida. Neste contexto, inúmeros estudos em mamíferos têm demonstrado a participação da insulina sobre a resposta inflamatória, favorecendo a proliferação celular e a capacidade migratória das células endoteliais, células do músculo liso vascular e dos monócitos, além de mediar a expressão de fatores pró-trombótico e pró-fibrótico. Porém, pouco se conhece o efeito deste hormônio peptídico sobre a reação inflamatória em peixes teleósteos. Para avaliar a participação da insulina sobre a resposta inflamatória aguda em tilápias do Nilo, Oreochromis niloticus, na aerocistite induzida por Aeromonas hydrophila, foram utilizadas 48 tilápias aloxano-diabéticas, constituindo dois grupos: dos diabéticos tratados com insulina e diabéticos sem tratamento. Após, seis, 24 e 48 horas do estimulo inflamatório, as tilápias foram submetidas à anestesia profunda para eutanásia e necropsia, e assim, obtenção de exsudato e colheita da bexiga natatória para analise da reação inflamatória. Partindo-se desta premissa, o presente estudo demonstrou a participação da insulina na reação inflamatória aguda infecciosa de tilápias do Nilo aloxano-diabéticas por favorecer o acúmulo positivo celular no exsudato, assim como o efeito proliferativo de tecido fibroso e a neovascularização no local inflamado. Tais achados reforçam a hipótese de que a insulina desempenha importante papel na resposta imune inata na reação inflamatória aguda, sendo um importante hormônio pró-inflamatório. Contudo, a tilápia do Nilo demonstrou ser um modelo experimental promissor para estudos e avanços em pesquisas envolvendo o diabetes mellitus.(AU)