Reactive Oxygen Species

Publication Title: 
Redox Biology

Liver failure induced by systemic inflammatory response (SIRS) is often associated with mitochondrial dysfunction but the mechanism linking SIRS and mitochondria-mediated liver failure is still a matter of discussion. Current hypotheses suggest that causative events could be a drop in ATP synthesis, opening of mitochondrial permeability transition pore, specific changes in mitochondrial morphology, impaired Ca(2+) uptake, generation of mitochondrial reactive oxygen species (mtROS), turnover of mitochondria and imbalance in electron supply to the respiratory chain.

Author(s): 
Kozlov, Andrey V.
Lancaster, Jack R.
Meszaros, Andras T.
Weidinger, Adelheid
Publication Title: 
BMC complementary and alternative medicine

BACKGROUND: Cellular damage caused by reactive oxygen species (ROS) has been implicated in several diseases, and hence natural antioxidants have significant importance in human health. The present study was carried out to evaluate the in vitro antioxidant and reactive oxygen species scavenging activities of Terminalia chebula, Terminalia belerica and Emblica officinalis fruit extracts. METHODS: The 70% methanol extracts were studied for in vitro total antioxidant activity along with phenolic and flavonoid contents and reducing power.

Author(s): 
Hazra, Bibhabasu
Sarkar, Rhitajit
Biswas, Santanu
Mandal, Nripendranath
Publication Title: 
Journal of Ethnopharmacology

AIM OF THE STUDY: The aqueous extract of Terminalia chebular fruits was reported to have anti-hyperglycemia and anti-diabetic complication effects. The present study therefore investigated the protective mechanism of chebulic acid, a phenolcarboxylic acid compound isolated from the ripe fruits of Terminalia chebula against advanced glycation endproducts (AGEs)-induced endothelial cell dysfunction.

Author(s): 
Lee, Hyun-Sun
Koo, Yoon-Chang
Suh, Hyung Joo
Kim, Kyung-Yong
Lee, Kwang-Won
Publication Title: 
International Journal of Cosmetic Science

The hydroglycolic (HG) extract from 70% propylene glycol (PG) extraction of myrobalan fruits showed the most appreciable antioxidant efficiency towards 1,1-diphenyl-2-picrylhydrazyl (DPPH) in comparison to the extracts from 30, 50, 70 and 100% ethyl alcohol (EA), and 30, 50 and 100% PG . Its total polyphenols were also higher than others. The additional analysis of antioxidant power revealed that this HG extract was able to counteract the induced oxidation caused by hydrogen peroxide (H(2) O(2) ) and 2,2'-azobis(2-amidinopropane) dihydrochloride (AAPH).

Author(s): 
Chulasiri, M.
Wanaswas, P.
Sriaum, D.
Nakamat, S.
Wongkrajang, Y.
Kongsaktrakoon, B.
Phornchirasilp, S.
Songchitsomboon, S.
Leelarungrayub, D.
Publication Title: 
Indian Journal of Pharmacology

OBJECTIVES: To evaluate the antioxidant and free-radical scavenging activities of triethylchebulate (TCL), an aglycone isolated from the fruit of Terminalia chebula Retz. MATERIALS AND METHODS: Microsomes, mitochondria and red blood cells (RBCs) were isolated from rat liver. The antioxidant capacities were evaluated by determining the inhibitory effects of TCL on lipid peroxidation, hydrogen peroxide (H(2)O(2))-induced RBCs hemolysis and RBCs autoxidative hemolysis.

Author(s): 
Chen, Xiuping
Sun, Fangyun
Ma, Lifeng
Wang, Jinhua
Qin, Hailin
Du, Guanhua
Publication Title: 
Journal of Ethnopharmacology

ETHNOPHARMACOLOGICAL RELEVANCE: Helicobacter pylori infection is associated with gastritis, peptic ulcer, and gastric cancer. Due to its high global prevalence and uprising resistance to available antibiotics, efforts are now directed to identify alternative source to treat and prevent associated disorders.

Author(s): 
Zaidi, Syed Faisal
Muhammad, Jibran Sualeh
Shahryar, Saeeda
Usmanghani, Khan
Gilani, Anwarul-Hassan
Jafri, Wasim
Sugiyama, Toshiro
Publication Title: 
Journal of Enzyme Inhibition and Medicinal Chemistry

Terminalia chebula fruit extracts were prepared sequentially with hexane, ethyl acetate, methanol and methanol-water (70:30) and tested for their ?-glucosidase inhibitory and antioxidant potential. The study resulted in the formulation of an extract with high ?-glucosidase inhibitory potential (IC(50) 0.19 ± 0.03 µg mL(-1)) enriched with hydrolysable tannins.

Author(s): 
Sasidharan, Indu
Sundaresan, A.
Nisha, V. M.
Kirishna, Mahesh S.
Raghu, K. G.
Jayamurthy, P.
Publication Title: 
Journal of Complementary & Integrative Medicine

The in vitro study of the antioxidant properties of the hydroalcoholic extracts of various Indian medicinal plants can logically help to develop a better and safer way of amelioration from oxidative stress. As aimed, the present study has been done to estimate and thereby conclude regarding the antioxidant activities of a few Indian medicinal plants, viz., Terminalia chebula, Terminalia belerica, Emblica officinalis, Caesalpinia crista, Cajanus cajan, and Tinospora cordifolia.

Author(s): 
Sarkar, Rhitajit
Mandal, Nripendranath
Publication Title: 
Phytotherapy research: PTR

Penta-O-galloyl-?-D-glucose (PGG) occurrs in high concentrations in medicinal herbs such as Rhus chinensis, Paeonia suffruticosa, Acer truncatum and Terminalia chebula, which demonstrate anti-inflammatory activity. We investigated the effect of PGG on stimulated and non-stimulated neutrophils in processes which included reactive oxygen species generation (ROS), metalloproteinase-9 and interleukin-8 secretion (IL-8), ?? integrin (CD11b) and L-selectin (CD62L) expression and apoptosis.

Author(s): 
Kiss, Anna K.
Filipek, Agnieszka
Zy?y?ska-Granica, Barbara
Naruszewicz, Marek
Publication Title: 
Toxicology in vitro: an international journal published in association with BIBRA

Advanced glycation end-products (AGEs) are formed during normal aging, and at an accelerated rate in metabolic syndrome patients. Nonalcoholic steatohepatitis (NASH) can be caused by the AGEs in plasma, while glyceraldehyde-derived AGEs (glycer-AGEs) are significantly higher in the serum of NASH patients. In this study, we investigated the molecular mechanisms of chebulic acid, isolated from Terminalia chebula Retz., in the inhibition of glycer-AGEs induced production of reactive oxygen species (ROS) and collagen accumulation using the LX-2 cell line.

Author(s): 
Koo, Yun-chang
Pyo, Min Cheol
Nam, Mi-Hyun
Hong, Chung-Oui
Yang, Sung-Yong
Lee, Kwang-Won

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