Antioxidant enzyme

Piper betle Linn. (Piperaceae) commonly known as betel vine is a popular medicinal plant in Asia.[1] Piper betle leaves have been used as a traditional medicine to treat a variety of health conditions thanks to their antibacterial, antifungal and antioxidant properties.

7p vikwong 29-09-2024 4 1   Download

Mục đích của nghiên cứu là đánh giá hoạt tính chống oxy hóa in vitro, in vivo và chống tăng đường huyết của nhân trần tía. Ba loại cao chiết chloroform, cao chiết ethanol và cao chiết nước của cây được đánh giá trên các mô hình chống oxy hóa FRAP (ferric reducing/antioxidant power), quét gốc tự do DPPH (1,1- diphenyl-2-picryl-hydrazyl) và ức chế enzyme xanthin oxidase.

6p viclerkmaxwel 16-02-2022 28 2   Download

Different types of halophiles have solved the problem how to hope with salt stress (and often with other forms of stress as well) in different ways, so that the study of microbial life at high salt concentrations can answer many basic questions on the adaptation of microorganisms to their environments. Most known halophiles are relatively easy to grow, and genera such as Halobacterium, Haloferax.

212p spiritedaway36 26-11-2021 11 3   Download

In vitro study evaluates the cytoroxicity, MTT assay, Inhibition of carbohydrates digestive enzymes and Glucose Uptake assay on Grewia umbellifera and Aphanamixis polystachaya. It shows that ELEGU has Glucose uptake by L6 cell lines to some extent than ELEAP.

253p spiritedaway36 26-11-2021 13 3   Download

Therefore, the study was undertaken to identify the marker antioxidant enzymes of drought sensitive and drought tolerant wheat cultivars those may be helpful in plant breeding for salt tolerance.

6p chauchaungayxua11 23-03-2021 13 2   Download

Nuclear factor erythroid-2 related factor 2 (Nrf2) is a crucial transcription factor that regulates the expression of defensive antioxidants and detoxification enzymes in cells. In a previous study, we showed that expression of the Nrf2 gene is regulated by an epigenetic modification. Rauvolfia verticillata, a traditional Chinese herbal medicine widely used in China, possesses anticancer and antioxidant effects. In this study, we investigated how Nrf2 is epigenetically regulated by reserpine, the main active component in R. verticillata, in mouse skin epidermal JB6 P+ cells.

11p caothientrangnguyen 09-05-2020 16 2   Download

Rice is one of the most important crop plants over the world. Our work studied on the physiological responses of rice seedlings (Oryza sativa cv. Dongjin) under drought condition by withholding water. In response to drought treatment, three-week-old rice seedlings exhibited typically morphological responses as leafs rolling and drying at 48 h after exposure to water deficit.

6p nganga_06 05-10-2015 72 4   Download

Cơ thể có thể không đủ enzym để tổng hợp Co Q10 và cũng thật khó lòng mà cơ thể ng-ời s.n xuất đ-ợc l-ợng tối -u. Những yếu tố làm gi.m mức Co Q10 trong cơ thể là tuổi cao, nghiện r-ợu, chế độ dinh d-ỡng thiếu (các vitamin, yếu tố vi l-ợng), luyện tập c-ờng độ cao, nghiện thuốc lá trực tiếp và gián tiếp, các stress (về tâm lý, ốm đau, nhiễm lạnh...), dùng một số thuốc (nh- các statin, thuốc phong bế bêta, thuốc chống trầm c.m). Coenzym Q10 còn đ-ợc gọi là ubiquinon (ubiquinon là...

5p sunshine_6 02-07-2013 73 11   Download

Previously, we demonstrated apoptotic cell death in the chorion laeve trophoblast layer of human fetal membrane tissues during the late stages of pregnancy, the progression of apoptosis during incubation in vitro, and its suppression by a low concentration of glucocorticoid hormones.

8p system191 01-06-2013 33 5   Download

This study investigated the enzymatic function of two putative plant GPXs, GPXle1 from Lycopersicon esculentum and GPXha2 from Helianthus annuus, which show sequence identities with the mammalian phospholipid hydroperoxide glutathione peroxidase (PHGPX). Both purified recombinant proteins expressed in Escherichia coli show PHGPX activity by reducing alkyl, fatty acid and phospholipid hydroperoxides but not hydrogen peroxide in the presence of glutathione.

7p research12 01-06-2013 37 4   Download

We investigated the changes in the oxidative stress response of yeast cells suffering mitochondrial dysfunction that could impair their viability. First, we demonstrated that cells with this dysfunction rely exclusively on cytosolic thioredoxin peroxidase I (cTPxI) and its reductant sulfiredoxin, among other antioxidant enzymes tested, to protect them against H2O2 -induced death.

12p dell39 27-03-2013 57 4   Download

The bifunctional enzyme glucose-6-phosphate dehydrogenase-6-phospho-gluconolactonase (G6PD-6PGL) found in Plasmodium falciparum has unique structural and functional characteristics restricted to this genus. This study was designed to examine the effects of RNA-mediated PfG6PD-6PGL gene silencing in cultures ofP. falciparumon the expression of para-site antioxidant defense genes at the transcription level.

10p inspiron33 26-03-2013 48 5   Download

Vitamin C, a reducing agent and antioxidant, is a cofactor in reactions cata-lyzed by Cu + -dependent monooxygenases and Fe 2+ -dependent dioxygenas-es. It is synthesized, in vertebrates having this capacity, fromd-glucuronate. The latter is formed through direct hydrolysis of uridine diphosphate (UDP)-glucuronate by enzyme(s) bound to the endoplasmic reticulum mem-brane, sharing many properties with, and most likely identical to, UDP-glucuronosyltransferases.

22p inspiron33 23-03-2013 53 5   Download

A 6A,6A¢-dicyclohexylamine-6B,6B¢-diselenide-bis-b-cyclodextrin (6-CySeCD) was designed and synthesized to imitate the antioxidant enzyme glutathione peroxidase (GPX). In this novel GPX model,b-cyclodextrin provided a hydrophobic environment for substrate binding within its cavity, and a cyclohexylamine group was incorporated into cyclodextrin in proximity to the catalytic selenium in order to increase the stability of the nucleophilic intermediate selenolate.

9p galaxyss3 21-03-2013 47 4   Download

Glutathione peroxidases (GPXs, EC 1.11.1.9) were first discovered in mam-mals as key enzymes involved in scavenging of activated oxygen species (AOS). Their efficient antioxidant activity depends on the presence of the rare amino-acid residue selenocysteine (SeCys) at the catalytic site.

18p galaxyss3 19-03-2013 43 5   Download

Pycnogenol  , which is extracted from the bark of French maritime pine, has been shown to have antioxidant and free radical scavenging activities. Thioredoxin reductase (TrxR), glutathione peroxidase (GPx) and glutathi-one reductase (GR) are three central redox enzymes that are active in endogenous defence against oxidative stress in the cell.

9p vinaphone15 27-02-2013 42 2   Download

Motor neuron degeneration in amyotrophic lateral sclerosis involves oxida-tive damage. Glutathione (GSH) is critical as an antioxidant and a redox modulator. We used a motor neuronal cell line (NSC-34) to investigate whether wild-type and familial amyotrophic lateral sclerosis-linked G93A mutant Cu,Zn superoxide dismutase (wt⁄G93ASOD1) modified the GSH pool and glutamate cysteine ligase (GCL), the rate-limiting enzyme for GSH synthesis.

14p viettel02 22-02-2013 25 3   Download

Taenia soliumis the cestode responsible for porcine and human cysticercosis. The ability of this parasite to establish itself in the host is related to its eva-sion of the immune response and its antioxidant defence system. The latter includes enzymes such as cytosolic Cu⁄Zn superoxide dismutase.

11p cosis54 09-12-2012 48 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Decreased glutathione levels and impaired antioxidant enzyme activities in drug-naive first-episode schizophrenic patients

7p thulanh29 17-12-2011 47 3   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: Reduction in antioxidant enzyme expression and sustained inflammation enhance tissue damage in the subacute phase of spinal cord contusive injury

16p toshiba23 18-11-2011 51 3   Download