Impact of antioxidant therapy on antioxidant capacity in hypertensive patients

Background: Hypertension is consistently related to the development of ischemic heart disease, heart failure, stroke, and chronic kidney disease. Oxidative stress has been associated with mechanisms of hypertension which could be nullified by antioxidants such as Vitamin C and Vitamin E. Aim and Objectives: The objectives of the study are as follows: (i) To estimate the impact of antioxidant therapy on antioxidant capacity in hypertensive patients; (ii) to measure serum levels of glutathione, glutathione peroxidase (GPx), glutathione reductase (GR), and superoxide dismutase (SOD) in hypertensive patients before and after giving them antioxidant therapy for 45 days. Materials and Methods: Thirty randomly selected hypertensive patients were given Supradyn tablet once a day for 45 days. Ferric reducing ability of plasma (FRAP), SOD, GR, GPx, and reduced Glutathione assays were measured before and after the intervention therapy. Results: Total antioxidant capacity as measured by serum FRAP in hypertensive patients before and after the therapy was increased significantly from 578.8 ± 60.85 to 592.1 ± 59.66 (?mol/L), respectively. The levels of SOD, GPx, GR, and Glutathione in hypertensive patients before giving antioxidant therapy were 1.6 ± 0.49 U/ml, 184.6 ± 17.1 ?mol/L/min, 8.96 ± 1.15 ?mol/L/min, and 8.03 ± 0.96 ?mol/g of Hb, respectively. The same after giving them antioxidant therapy were 1.7 ± 0.46 U/ml, 182.4 ± 15.98 ?mol/L/min, 8.83 ± 1.11 ?mol/L/min, and 7.83 ± 0.94 ?mol/g of Hb, respectively. The levels of GPx, GR, and Glutathione were significantly decreased after giving antioxidant therapy for 45 days while SOD level did not change significantly. Conclusion: Antioxidant therapies for 45 days led to a significant increase in total antioxidant capacity as shown by plasma FRAP levels and a significant decrease in serum levels of enzymatic antioxidants such as GPx, GR and Glutathione in hypertensive patients. However, serum levels of SOD did not show a significant change.

Neutrophil and Platelet to Lymphocyte Ratio in Prevailing the Oxidative Stress and its Relation with the Endothelial Dysfunction in Preeclampsia

Background: Preeclampsia (PE) is a pregnancy specific,hypertensive disorder. It affects 2-8% pregnancies.Oxidative stress and systemic inflammation areproposed to contribute significantly to the preeclampsiapathophysiology. The present study, aim is to determineand compare the markers of oxidative stress, endothelialdysfunction, systemic inflammatory markersNeutrophil/Lymphocyte Ratio (NLR) and Platelet/Lymphocyte Ratio (PLR) in preeclampsia andgestational age matched healthy controls. Material andMethods: This study was conducted in the Departmentof Biochemistry and Department of Obstetrics andGynecology, Sri Devaraj Urs Medical College, Kolar,Karnataka. The study included 98 preeclamptic womenand 98 normotensive pregnant women. Five ml venousblood was collected from all the study subjects. Bloodsample in EDTA vials was used for the complete bloodcount. NLR and PLR were calculated. Plasma was usedfor Ferric Reducing Ability of Plasma (FRAP) assay.Serum was used for the estimation of Malondialdehyde(MDA), nitric oxide, blood sugar, renal parameters andliver enzymes i.e., Aspartate Transaminase (AST),Alanine Transaminase (ALT), Lactate Dehydrogenase(LDH) and magnesium. Corresponding urine sampleswere collected for urinary protein analysis by dipstickmethod. Fetal outcome was recorded. Results:Gestational age was significantly low in preeclampticwomen as compared to those of controls. Bloodpressure (Systolic and diastolic), mean arterial pressure,body mass index, pulse rate, serum creatinine, uric acid,AST, ALT, LDH, MDA and NLR were increasedsignificantly in preeclamptic women as compared tothose of controls. In subgroup analysis, NLR wasincreased significantly in severe preeclamptics ascompared to mild preeclamptics. Serum Nitric Oxide(NO) and FRAP levels were decreased significantly inpreeclamptic women as compared to those of controls.Significantly decreased birth weight was observed inbabies born to preeclamptic mothers compared withcontrols. Conclusion: The present study resultsconclude that increased oxidative stress in termsincreased MDA, decreased NO and reduced antioxidantstatus (FRAP) in preeclamptic women, results inadverse perinatal outcome. In addition, maternal NLRcould be considered as a marker for severity ofpreeclampsia

Fibra y capacidad antioxidante de algas comestibles en ratas suficientes o deficientes en vitamina E / Fiber and antioxidant capacity of edible algae in vitamin E sufficient and deficient rats / Fibra e capacidade antioxidante de algas comestíveis em camundongos suficientes e deficientes em vitamina E

Debido a la importancia que han alcanzado las algas en la alimentación de los países occidentales aquí se estudió el potencial de las algas Nori y Wakame como fuentes de fibra y capacidad antioxidante en ratas en crecimiento alimentadas con dietas suficientes o deficientes en vitamina E (vit E) durante 15 días. Hubo 3 grupos de ratas que recibieron dietas: 1. grupo control, 2. grupo Nori y 3 grupo Wakame con vit E y 3 grupos similares sin vit E. En las dietas con vit E, Nori produjo una reducción de crecimiento y las dos algas causaron una acumulación de vit E hepática, una reducción en la vit E plasmática y un aumento en TBARS en plasma e hígado. En contraste, cuando las algas se ofrecieron en dietas exentas de vit E, el grupo Nori recuperó su capacidad de crecer, mantuvo una mayor reserva de vit E en el hígado que el grupo control deficiente en vit E y el consumo de ambas algas resultó en TBARS plasmáticos por debajo de las ratas controles deficientes en vit E, lo que señaló que las algas se comportaron mejor en dietas sin vit E. Adicionalmente, se observó que las algas estimularon la función excretora del intestino sin afectar su capacidad absortiva.

In western countries, edible seaweed consumption has markedly increased in recent years. Accordingly, in this study the antioxidant capacity and fiber value of Nori and Wakame algae were evaluated in growing rats fed with sufficient of deficient vitamin E. There were 3 groups of rats: 1. Control, 2. Nori and 3. Wakame with vitamin E and 3 similar groups without vitamin E. The diet with Nori and sufficient vitamin E caused a reduction in growth and Nori and Wakame were associated with liver vitamin E accumulation, plasma vitamin E reduction and an increase in TBARS in liver and plasma. In contrast, when the same diets were offered without vitamin E, the Nori fed rats recovered their growing capacity, they maintained a higher vitamin E reserve than the control or Wakame fed rats, and the consumption of both algae was associated with lower plasma TBARS than vitamin E deficient rats, indicating that these algae are best accepted when offered without vitamin E. In addition, both algae improved the excretory capacity of the intestine without affecting its absorption function.

Visto que nos países ocidentais revestiu importância o consumo de algas na alimentação, aqui foi estudado o potencial das algas Nori e Wakame como fontes de fibra e capacidade antioxidante em ratos em crescimento, alimentados com dietas suficientes ou deficientes em vitamina E (vit E) durante 15 dias. Houve 3 grupos de ratos que receberam dietas: 1. grupo controle, 2. grupo Nori e 3. grupo Wakame com vit E e 3 grupos similares sem vit E. Nas dietas com vit E, Nori produziu uma redução no crescimento e as duas algas provocaram uma acumulação de vit E hepática, redução da vit E plasmática e aumento em TBARS em plasma e fígado. Em contraste, quando as algas foram oferecidas em dietas sem vitamina E, o grupo Nori recuperou sua capacidade de crescimento, manteve maior reserva de vit E no fígado do que o grupo controle deficiente em vit E e o consumo de ambas as algas resultou em TBARS plasmáticos mais baixos do que nos ratos do grupo controle deficientes em vitamina E, indicando que essas algas são melhor aceitas quando oferecidas sem vit E. E, também, as algas melhoraram a capacidade de excreção do intestino sem afetar sua função de absorção.

Urinary 8‑hydroxydeoxyguanosine as a marker of oxidative stress induced genetic toxicity in oral cancer patients.

Context: Recently, non‑communicable diseases have snatched the lead from infectious diseases in causing mortality. Of these, oral cancer accounts for a significant proportion of deaths. Every year in India significant percentage of newly diagnosed malignancy is oral cancer attributed to various reasons. Aims: The aim of this study was to assess the extent of oxidative stress and its effect on modification of DNA by urinary nucleoside 8-hydroxy-2’-deoxyguanosine (8-OHdG) levels in oral cancer subjects. To see the relationship between the nucleoside 8‑OHdG and antioxidant capacity ferric reducing ability plasma (FRAP) in oral cancer subjects. Settings and Design: Case–control study included three groups with 60 volunteers, who were divided into 30 controls, and equal number of clinically diagnosed oral cancer male patients: (Subdivided into newly diagnosed [n = 15] and 1‑year treatment follow‑up oral cancer subjects [n = 15]). Materials and Methods: A random urine sample was used for analysis of 8‑OHdG concentration. Serum triglycerides, lipid peroxidation, protein thiols, and FRAP assay were performed by spectrophotometric technique. Statistical Analysis Used: Student’s t‑test and one‑way analysis of variance were performed for group comparison and Pearson’s correlation analysis were used. A P < 0.05 was considered the optimum level of significance. Results: The urinary 8‑OHdG and serum malondialdehyde levels were significantly elevated in newly diagnosed oral cancer subjects in their 1‑year treatment compared to the control group (P < 0.05). A significant correlation was observed between urinary 8‑OHdG and FRAP in both groups of oral cancer subjects. Conclusions: Urinary 8‑OHdG can be a useful diagnostic marker of oxidative DNA damage in oral cancer subjects.

In-Vitro Antioxidant Activity of Ethanolic Extract of Centaurea behen.

The present investigation was conducted to investigate the in-vitro activity of ethanolic extract of Roots of Centaurea behens by using DPPH radical scavenging activity, nitric oxide radical scavenging activity, hydrogen peroxide radical scavenging activity, hydroxyl radical. Result suggests that the extract possess significant antioxidant activity as compared to the standard ascorbic acid and thus further in vivo investigation is required to evaluate the medicinal significance of the extract which can be used for assessing the possible therapeutic importance of the drug.

Induction of oxidative stress and histopathological changes by sub-chronic doses of triazophos.

The effect of triazophos (O, O-diethyl O-1-phenyl-1 H-1, 2, 4-triazol-3-yl phosphorothioate), a widely used insecticide was studied on the induction of oxidative stress and histological alterations at sub-chronic doses in male albino rats. Oral administration of triazophos at concentrations of 1.64, 3.2 and 8.2 mg/kg body wt for 30 days produced dose as well as time-dependent increase in the lipid peroxidation (determined by malondialdehyde levels) and glutathione-S-transferase (GST) activity in serum with a concomitant decrease in ferric reducing ability of plasma (FRAP) and blood glutathione (GSH) content. Histopathological examination of liver of triazophos-treated rats showed significant and progressive degenerative changes as compared to control, which could be due to induction of oxidative stress. However, no significant histopathological changes were observed in spleen, kidney and brain at either dose of triazophos with respect to control. These results indicated that oral administration of triazophos was associated with enhanced lipid peroxidation and compromised antioxidant defence in rats in dose and time-dependent manner. Thus the present study demonstrated for the first time the role of oxidative stress as the important mechanism involved in the stimulation of hepatic histo-architectural alterations at sub-chronic doses of triazophos in rats.