scholarly journals Antioxidative Properties and Inhibition of Key Enzymes Relevant to Type-2 Diabetes and Hypertension by Essential Oils from Black Pepper

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Ganiyu Oboh ◽  
Ayokunle O. Ademosun ◽  
Oluwatoyin V. Odubanjo ◽  
Ifeoluwa A. Akinbola
Keyword(s):  
Type 2 Diabetes ◽  
Essential Oil ◽  
Enzyme Activities ◽  
Phenolic Content ◽  
Antioxidant Properties ◽  
Black Pepper ◽  
Converting Enzyme ◽  
Piper Guineense ◽  
Key Enzymes

The antioxidant properties and effect of essential oil of black pepper (Piper guineense) seeds onα-amylase,α-glucosidase (key enzymes linked to type-2 diabetes), and angiotensin-I converting enzyme (ACE) (key enzyme linked to hypertension) were assessed. The essential oil was obtained by hydrodistillation and dried with anhydrous Na2SO4, and the phenolic content, radical [1,1-diphenyl-2 picrylhydrazyl (DPPH), 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) and nitric oxide (NO)] scavenging abilities as well as the ferric reducing antioxidant property (FRAP) and Fe2+-chelating ability of the essential oil were investigated. Furthermore, the effect onα-amylase,α-glucosidase, and ACE enzyme activities was also investigated. The characterization of the constituents was done using GC. The essential oil scavenged DPPH*, NO*, and ABTS* and chelated Fe2+.α-Pinene,β-pinene, cis-ocimene, myrcene, allo-ocimene, and 1,8-cineole were among the constituents identified by GC. The essential oil inhibitedα-amylase,α-glucosidase, and ACE enzyme activities in concentration-dependent manners, though exhibiting a stronger inhibition ofα-glucosidase thanα-amylase activities. Conclusively, the phenolic content, antioxidant activity, and inhibition ofα-amylase,α-glucosidase, and angiotensin-1 converting enzyme activities by the essential oil extract of black pepper could be part of the mechanism by which the essential oil could manage and/or prevent type-2 diabetes and hypertension.

scholarly journals Essential Oil from Clove Bud (Eugenia aromatica Kuntze) Inhibit Key Enzymes Relevant to the Management of Type-2 Diabetes and Some Pro-oxidant Induced Lipid Peroxidation in Rats Pancreas in vitro

2015 ◽  
Vol 64 (7) ◽  
pp. 775-782 ◽  
Author(s):  
Ganiyu Oboh ◽  
Ifeoluwa A. Akinbola ◽  
Ayokunle O. Ademosun ◽  
David M. Sanni ◽  
Oluwatoyin V. Odubanjo ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Lipid Peroxidation ◽  
Essential Oil ◽  
Key Enzymes

DD genotype of angiotensin-converting enzyme in type 2 diabetes mellitus with renal disease in Mexican Mestizos

Nephrology ◽  
2009 ◽  
Vol 14 (2) ◽  
pp. 235-239 ◽  
Author(s):  
SILVIA PALOMO-PIÑÓN ◽  
MARGARITA E GUTIÉRREZ-RODRÍGUEZ ◽  
MARGARITA DÍAZ-FLORES ◽  
REYNA SÁNCHEZ-BARRERA ◽  
ADÁN VALLADARES-SALGADO ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Angiotensin Converting Enzyme ◽  
Renal Disease ◽  
Converting Enzyme ◽  
Mexican Mestizos

scholarly journals In Vitro Studies on the Antioxidant Property and Inhibition of α-Amylase, α-Glucosidase, and Angiotensin I-Converting Enzyme by Polyphenol-Rich Extracts from Cocoa (Theobroma cacao) Bean

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Ganiyu Oboh ◽  
Ayokunle O. Ademosun ◽  
Adedayo O. Ademiluyi ◽  
Olasunkanmi S. Omojokun ◽  
Esther E. Nwanna ◽  
...  
Keyword(s):  
Enzyme Activities ◽  
Theobroma Cacao ◽  
Antioxidant Property ◽  
Cocoa Bean ◽  
Dependent Manner ◽  
Converting Enzyme ◽  
Angiotensin I Converting Enzyme ◽  
Dose Dependent

Background. This study sought to investigate the antidiabetic and antihypertensive mechanisms of cocoa (Theobroma cacao) bean through inhibition of α-amylase, α-glucosidase, angiotensin-1 converting enzyme, and oxidative stress. Methodology. The total phenol and flavonoid contents of the water extractable phytochemicals from the powdered cocoa bean were determined and the effects of the extract on α-amylase, α-glucosidase, and angiotensin-1 converting enzyme activities were investigated in vitro. Furthermore, the radicals [1,1-diphenyl-2 picrylhydrazyl (DPPH), 2,2..-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS), hydroxyl (OH), and nitric oxide (NO)] scavenging ability and ferric reducing antioxidant property of the extract were assessed. Results. The results revealed that the extract inhibited α-amylase (1.81 ± 0.22 mg/mL), α-glucosidase (1.84 ± 0.17 mg/mL), and angiotensin-1 converting enzyme (0.674 ± 0.06 mg/mL [lungs], 1.006 ± 0.08 mg/mL [heart]) activities in a dose-dependent manner and also showed dose-dependent radicals [DPPH (16.94 ± 1.34 mg/mL), NO (6.98 ± 0.886 mg/mL), OH (3.72 ± 0.26 mg/mL), and ABTS (15.7 ± 1.06 mmol/TEAC·g] scavenging ability. Conclusion. The inhibition of α-amylase, α-glucosidase, and angiotensin-1 converting enzyme activities by the cocoa bean extract could be part of the possible mechanism by which the extract could manage and/or prevent type-2 diabetes and hypertension.

scholarly journals METFORMIN USE IN DIABETES PRIOR TO HOSPITALIZATION: EFFECTS ON MORTALITY IN COVID-19

2020 ◽  
Vol 26 (10) ◽  
pp. 1166-1172
Author(s):  
Jinghong Li ◽  
Qi Wei ◽  
Willis X. Li ◽  
Karen C. McCowen ◽  
Wei Xiong ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Severe Acute Respiratory Syndrome ◽  
Angiotensin Converting Enzyme ◽  
Clinical Data ◽  
Laboratory Data ◽  
Converting Enzyme ◽  
Angiotensin Converting Enzyme 2

Objective: Although type 2 diabetes mellitus (T2DM) has been reported as a risk factor for coronavirus disease 2019 (COVID-19), the effect of pharmacologic agents used to treat T2DM, such as metformin, on COVID-19 outcomes remains unclear. Metformin increases the expression of angiotensin converting enzyme 2, a known receptor for severe acute respiratory syndrome coronavirus 2. Data from people with T2DM hospitalized for COVID-19 were used to test the hypothesis that metformin use is associated with improved survival in this population. Methods: Retrospective analyses were performed on de-identified clinical data from a major hospital in Wuhan, China, that included patients with T2DM hospitalized for COVID-19 during the recent epidemic. One hundred and thirty-one patients diagnosed with COVID-19 and T2DM were used in this study. The primary outcome was mortality. Demographic, clinical characteristics, laboratory data, diabetes medications, and respiratory therapy data were also included in the analysis. Results: Of these 131 patients, 37 used metformin with or without other antidiabetes medications. Among the 37 metformin-taking patients, 35 (94.6%) survived and 2 (5.4%) did not survive. The mortality rates in the metformin-taking group versus the non-metformin group were 5.4% (2/37) versus 22.3% (21/94). Using multivariate analysis, metformin was found to be an independent predictor of survival in this cohort ( P = .02). Conclusion: This study reveals a significant association between metformin use and survival in people with T2DM diagnosed with COVID-19. These clinical data are consistent with potential benefits of the use of metformin for COVID-19 patients with T2DM. Abbreviations: ACE2 = angiotensin-converting enzyme 2; AMPK = AMP-activated protein kinase; BMI = body mass index; COVID-19 = coronavirus disease 2019; SARSCoV-2 = severe acute respiratory syndrome coronavirus 2; T2DM = type 2 diabetes mellitus

scholarly journals Prediction Models of Albumin Renal Excretion in Type 2 Diabetes Mellitus Patients

2019 ◽  
Vol 70 (11) ◽  
pp. 3802-3807
Author(s):  
Amorin Remus Popa ◽  
Claudia Teodora Judea Pusta ◽  
Cosmin Mihai Vesa ◽  
Simona Bungau ◽  
Camelia Liana Buhas ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Enzyme Inhibitors ◽  
Angiotensin Converting Enzyme Inhibitors ◽  
Converting Enzyme ◽  
Angiotensin Ii Receptor ◽  
Converting Enzyme Inhibitors ◽  
Positive Correlation

Microalbuminuria is a cardiovascular risk factor in type 2 diabetes mellitus patients. It is very important to know which the predictor factors for albuminuria are, because these elements may be influenced by pharmacological measures. In our study we propose three models for the prediction of albumin glomerular excretion in a group of 446 type 2 diabetes mellitus patients: the clinical-biochemical model, the pharmacological model, and the integrative model that reunites the two models. In the clinical-biochemical model, albumin excretion was statistically significant influenced by HbA1c (positive correlation) and blood pressure (positive correlation). In the pharmacological model, albumin excretion was influenced by angiotensin converting enzyme inhibitors or angiotensin II receptor blockers treatment (negative correlation). In the integrative model, the factors were HbA1c (positive correlation), diastolic blood pressure (positive correlation), angiotensin converting enzyme inhibitors or angiotensin II receptor blockers treatment (negative correlation) and statins treatment (negative correlation). The prevalence of microalbuminuria was 16.14 %. Patients with microalbuminuria had statistically significant higher values of HbA1c, systolic blood pressure, diastolic blood pressure, triglycerides and lower values of HDL-cholesterol. A low glucose control was the most important risk factor for an increased albumin glomerular elimination. The importance of our study consists in the fact that all the elements that predict albuminuria can be influenced: HbA1c, blood pressure, therapy with angiotensin converting enzyme inhibitors or angiotensin II receptor blockers and statins.

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