Glaucoma is an optic neuropathy in which retinal ganglion cells die probably through an apoptotic process. Apoptosis is known to involve free radicals in several systems including the retina. In this context, the aim of the present work was to analyze retinal oxidative damage in rats with glaucoma induced by the chronic injection of hyaluronic acid in the eye anterior chamber. The results showed a significant decrease in total retinal superoxide dismutase and catalase activities after 6 and 3 weeks of treatment with hyaluronic acid, respectively. Also, although GPX activity increased after 10 weeks of ocular hypertension, GSH levels significantly decreased at 6 weeks of treatment with hyaluronic acid. Moreover, retinal lipid peroxidation significantly increased in a time-of-hypertension-dependent manner. On the other hand, a significant decrease in both diurnal and nocturnal retinal melatonin content was detected at 3, 6, or 10 weeks of treatment with hyaluronic acid. The present results suggest that retinal oxidative stress may be involved in glaucomatous cell death. Thus, manipulation of intracellular redox status using antioxidants may be a new therapeutic tool to prevent glaucomatous neurodegeneration.

Retinal Oxidative Stress Induced by High Intraocular Pressure

A link between oxidative stress and hypertension has been firmly established in multiple animal models of hypertension but remains elusive in humans While initial studies focused on inactivation of nitric oxide by superoxide, our understanding of relevant reactive oxygen species (superoxide, hydrogen peroxide, and peroxynitrite) and how they modify complex signaling pathways to promote hypertension has expanded significantly In this review, we summarize recent advances in delineating the primary and secondary sources of reactive oxygen species (nicotinamide adenine dinucleotide phosphate oxidases, uncoupled endothelial nitric oxide synthase, endoplasmic reticulum, and mitochondria), the posttranslational oxidative modifications they induce on protein targets important for redox signaling, their interplay with endogenous antioxidant systems, and the role of inflammasome activation and endoplasmic reticular stress in the development of hypertension We highlight how oxidative stress in different organ systems contributes to hypertension, describe new animal models that have clarified the importance of specific proteins, and discuss clinical studies that shed light on how these processes and pathways are altered in human hypertension Finally, we focus on the promise of redox proteomics and systems biology to help us fully understand the relationship between ROS and hypertension and their potential for designing and evaluating novel antihypertensive therapies

Oxidative Stress and Hypertension

Oxidative Stress: A Unifying Paradigm in Hypertension.

Nanotechnology based drug delivery system: Current strategies and emerging therapeutic potential for medical science

Molecular pathways to neurodegeneration

Concurrent with the misbalance of oxidizing agents and antioxidants, high blood pressure is a major physical burden condition in the current scenario. Tumor necrosis factor-α (TNF-α) plays a vital role in the pathogenesis of hypertension. Tumor necrosis factor-α, inhibitor improves clinical symptoms however their outcome on high blood pressure has not been investigated. We investigated the inflammatory marker TNF-α, malondialdehyde (MDA) and ferric reducing antioxidant power (FRAP) in hypertensive patients. We measured randomly blood pressure using an ambulatory observe in hypertensive patients, measured systolic BP X 140 mmHg and/or diastolic BP X 90 mmHg were considered hypertensive. Total 60 cases were considered in the study that involves 30 hypertensive patients and 30 normal control. Measurements of serum concentrations of TNF-α, MDA, FRAP in hypertension patients was done in both the groups. Serum TNF-α was found to be remarkably increased in study subjects as compared to normal group (r=0.32, p<0.0001*). Serum MDA was also raised in hypertensive as compared to control (r=0.99**, p<0.0001*). While Serum FRAP was found to be decreased in hypertensive group in comparison to healthy control (r=0.23, p<0.0001*). It is concluded that high blood pressure leads to generation of oxidative stress with remarkable elevation of TNF-α and malondialdehyde levels. While reduced FRAP indicates its probable role in lipid peroxidation and in the pathogenesis of hypertension.

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Oxidative stress and biomarker of TNF-α, MDA and FRAP in hypertension.

Coronavirus disease 2019 (COVID-19) is a major public health concern currently. To date, there are no approved antiviral drugs or vaccines against this transmissible disease. This report sheds light on available information for a better understanding of clinical trials and pharmacotherapy related to COVID-19. MEDLINE, PubMed, EMBASE, Scopus databases, Web of Science, WHO, and EU clinical trial sites were used to perform comparative analysis. Information was collected on the use of therapeutic agents for human therapy in patients with COVID-19 up to May 2020. We have extracted data from 60 clinical trials. Amongst these trials, 34 were from the European Union database of clinical trials and 26 from the National Institute of Health. The data selection procedure includes active, completed, and recruitment in progress status. Most of the clinical trials are ongoing and hence, there is a lack of precise results for the treatment.There is a lack of high-quality clinical evidence. The protocol to be developed requires large randomized clinical trials with a combination of available drugs and prospective therapies. We propose the usage of a large number of cases and different statistical analyses to conduct systematic clinical trials. This could provide comprehensive information about the clinical trial and potential therapeutic progress.

Current updates on the European and WHO registered clinical trials of coronavirus disease 2019 (COVID-19).

Reactive oxygen species (ROS) are products of normal cellular metabolism and are known to act as second messengers. Physiological conditions, ROS participate in the maintenance of cellular ‘redox homeostasis’ in order to protect cells against oxidative stress through various redox-regulatory mechanisms. Oxidative stress resulting from enhances free-radical formation and/or a defect in antioxidant defences has been implicated in the pathogenesis of diabetes and its associated complications. Diabetes mellitus comprises a group of metabolic disorders that share the common phenotype of hyperglycemia, association with the biochemical alteration of glucose and lipid peroxidation. Increase the level of oxidative stress along with deranging different metabolisms; one of the Long term complications of diabetes mellitus is diabetic retinopathy, which is a leading cause of acquired blindness. Many of the recent landmarks in scientific research have shown that in human beings, oxidative stress has been implicated in the progression of major health problems by inactivating the metabolic enzymes and damaging important cellular components, oxidizing the nucleic acids, leading to cardiovascular diseases, eye disorders, joint disorders, neurological diseases (Alzheimer’s disease, Parkinson’s disease and amyotrophic lateral sclerosis), atherosclerosis, lung and kidney disorders, liver and pancreatic diseases, cancer, ageing, disease of the reproductive system including the male and female infertility etc. In this review, we had the importance of endogenous antioxidant defense systems, the intense medical management; these strategies include dietary measures (antioxidants) their relationship to several pathophysiological processes and their possible therapeutic implications in vivo condition. Key-wordsOxidative stress, Reactive oxygen species, Diabetic mellitus, Diabetic complications, Free radicals, Associated diseases, Lipid peroxidation

Role of Oxidant Alteration of Biomolecules in Diabetes and Other Associated Diseases

Since December 2019, the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has been a global health concern. The transmission method is human-to-human. Since this second wave of SARS-CoV-2 is more aggressive than the first wave, rapid testing is warranted to use practical diagnostics to break the transfer chain. Currently, various techniques are used to diagnose SARS-CoV-2 infection, each with its own set of advantages and disadvantages. A full review of online databases such as PubMed, EMBASE, Web of Science, and Google Scholar was analyzed to identify relevant articles focusing on SARS-CoV-2 and diagnosis and therapeutics. The most recent article search was on May 10, 2021. We summarize promising methods for detecting the novel Coronavirus using sensor-based diagnostic technologies that are sensitive, cost-effective, and simple to use at the point of care. This includes loop-mediated isothermal amplification and several laboratory protocols for confirming suspected 2019-nCoV cases, as well as studies with non-commercial laboratory protocols based on real-time reverse transcription-polymerase chain reaction and a field-effect transistor-based bio-sensing device. We discuss a potential discovery that could lead to the mass and targeted SARS-CoV-2 detection needed to manage the COVID-19 pandemic through infection succession and timely therapy.

Rapid diagnostic methods for SARS-CoV-2 (COVID-19) detection: an evidence-based report.

This study was undertaken to evaluate the serum lev els of Oxidant (MDA) & antioxidant (SOD & Vitamin E) and compare oxidative stress (MDA) level among normotensive and hypertensive subjects. Oxidative stress has been re lationship with mechanisms of EH (essential hypertension). A total number of 70 subjects were taken including both sex (Men and Women) between the ages of 35-70 years taken in this study. Exclus ion criteria were chronic diseases, alcohol consume r, obesity, smoking/tobacco con- sumer and current use of any medication. Antioxidant enzymes activity and lipid peroxidation (malondia ldehyde) were determined in serum. In 70 subjects out of 35 were found as an co ntrols normotensive individuals and the cases 35 hy pertensive patients. Serum MDA levels were highly significantly elevated in hypertensive patients in compared to normotensive individuals (4.39±0.98 µmol/l vs 1.51±0.70µmol/l and p < 0.0001). SOD acts as an ant ioxidant was highly significantly decrease in hyper tensive patients in compared to normotensive individuals (0.44±0.06U/mg protein/min vs 0.96±0.04 U/mg protein/min and p <0.0001). Vitamin E, which acts as a biomarker of hypertensive was significantly higher decrease in hypertensive in compared to normotensive individuals (0.69±0.08 vs 1.06±0.25 and p < 0.001). These findings demonst rate the strong association of SOD and Vitamin E le vel decrease in hypertensive patients and by MDA level increase in hypertensive patients. Oxidative stress in hypertensive patients increasing over time may play a role in the improvement of atherosclerosis and card iovascular disease, should be considered in further research.

Manish Kumar Verma

Papers

Oxidative stress and biomarker of TNF-α, MDA and FRAP in hypertension.

Current updates on the European and WHO registered clinical trials of coronavirus disease 2019 (COVID-19).

Role of Oxidant Alteration of Biomolecules in Diabetes and Other Associated Diseases

Rapid diagnostic methods for SARS-CoV-2 (COVID-19) detection: an evidence-based report.

Study of Oxidant (MDA) and Antioxidants (SOD & Vitamin E) in Hypertensive Patients and Normotensive Individuals