Results 41 to 50 of about 159,022 (340)

Acetonyltriphenylphosphonium nitrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2013
Crystals of the title salt, C21H20OP+·NO3−, are composed of acetonyltriphenylphosphonium cations and nitrate anions that mainly interact through electrostatic forces. The P atom in the cation has a slightly distorted tetrahedral environment, with C—P—C angles ranging from 104.79 (7) to 112.59 (6)°. The sum of O—N—O angles of the nitrate anion is 359.99°
Tidiane Diop, Libasse Diop, Monika Kučeráková, Michal Dušek   +3 more
openaire   +3 more sources

High Glucose-Mediated Tyrosine Nitration of PI3-Kinase: A Molecular Switch of Survival and Apoptosis in Endothelial Cells

Antioxidants, 2018
Diabetes and hyperglycemia are associated with increased retinal oxidative and nitrative stress and vascular cell death. Paradoxically, high glucose stimulates expression of survival and angiogenic growth factors.
Sally L. Elshaer, Tahira Lemtalsi, Azza B. El-Remessy   +2 more
doaj   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Selective nitration of Hsp90 acts as a metabolic switch promoting tumor cell proliferation

Redox Biology
Tumors develop in an oxidative environment characterized by peroxynitrite production and downstream protein tyrosine (Y) nitration. We showed that tyrosine nitration supports schwannoma cell proliferation and regulates cell metabolism in the inheritable ...
Isabelle E. Logan, Kyle T. Nguyen, Tilottama Chatterjee, Bhagyashree Manivannan, Ngozi P. Paul, Sharon R. Kim, Evelyn M. Sixta, Lydia P. Bastian, Carrie Marean-Reardon, Matthias A. Karajannis, Cristina Fernández-Valle, Alvaro G. Estevez, Maria Clara Franco   +12 more
doaj   +1 more source

Glucocorticoids for human skin: New aspects of the mechanism of action [PDF]

, 2005
Topical glucocorticoids have always been considered first-line drugs for inflammatory diseases of the skin and bronchial system. Applied systemically, glucocorticoids are used for severe inflammatory and immunological diseases and the inhibition of ...
Ahmed, M., Holtje, H. D., Kleuser, B., Korting, Hans Christian, Schäfer-Korting, Monika   +4 more
core   +1 more source

PARP inhibition and pharmacological ascorbate demonstrate synergy in castration‐resistant prostate cancer

Molecular Oncology, EarlyView.
Pharmacologic ascorbate (vitamin C) increases ROS, disrupts cellular metabolism, and induces DNA damage in CRPC cells. These effects sensitize tumors to PARP inhibition, producing synergistic growth suppression with olaparib in vitro and significantly delayed tumor progression in vivo. Pyruvate rescue confirms ROS‐dependent activity.
Nicolas Gordon, Peter T. Gallagher, Orly I. Richter, Neermala Poudel Neupane, Amy C. Mandigo, Jennifer J. McCann, Emanuela Dylgjeri, Irina Vasilevskaya, Christopher McNair, Channing J. Paller, Wm. Kevin Kelly, Karen E. Knudsen, Matthew J. Schiewer, Ayesha A. Shafi   +13 more
wiley   +1 more source

The specificity of endogenous fatty acid nitration: only conjugated substrates support the in vivo formation of nitro-fatty acids

Redox Biochemistry and Chemistry
Through multiple pathways, nitrogen dioxide (•NO2) is the main species involved in endogenous nitration reactions. Early studies in the field primarily explored tyrosine nitration, a dominant reaction in the field. It was later shown that lipids are also
Nicole Colussi, Fei Chang, Francisco J. Schopfer   +2 more
doaj   +1 more source

Engineered P450 biocatalysts show improved activity and regio-promiscuity in aromatic nitration

Scientific Reports, 2017
Nitroaromatics are among the most important and commonly used chemicals but their production often suffers from multiple unsolved challenges. We have previously described the development of biocatalytic nitration processes driven by an engineered P450 ...
Ran Zuo, Yi Zhang, Chao Jiang, John C. Hackett, Rosemary Loria, Steven D. Bruner, Yousong Ding   +6 more
doaj   +1 more source

Paradoxical roles of antioxidant enzymes:Basic mechanisms and health implications [PDF]

, 2015
Reactive oxygen species (ROS) and reactive nitrogen species (RNS) are generated from aerobic metabolism, as a result of accidental electron leakage as well as regulated enzymatic processes.
Amit R. Reddi, Arne Holmgren, Chan PH, Chen EP, Chu FF, Daiber A, Elias S. J. Arnér, Geismann C, Hogan B, Jaarsma D, Jian-Hong Zhu, Jin R, Leitzmann C, Li JJ, Li JJ, Lu YP, Makino N, Miranda-Vizuete A, Mirochnitchenko O, Motoori S, Mulder DW, Ogata M, Oury TD, Papaioannou V, Radi R, Sandbach JM, Takahara S, Thimmulappa RK, Tome ME, Vogel U, Wang F, Wen JK, Wen-Hsing Cheng, Wispe JR, Woychik RP, Xin Gen Lei, Ye-Shih Ho, Yongping Bao, Yoshida T   +38 more
core   +1 more source

Dietary nitrate and nitrite protect against doxorubicin‐induced cardiac fibrosis and oxidative protein damage in tumor‐bearing mice

FEBS Open Bio, EarlyView.
Chemotherapies such as doxorubicin can have toxic effects on healthy cardiovascular/heart tissue. Following up on a doxorubicin toxicity study in mice without tumors where nitrate water was cardioprotective (lessened toxicity), this study with tumor‐bearing mice undergoing doxorubicin treatment showed no negative effect of nitrate and nitrite on drug ...
Rama D. Yammani, Xiaofei Chen, Nildris Cruz‐Diaz, Xuewei Zhu, Swati Basu, Daniel B. Kim‐Shapiro, David R. Soto‐Pantoja, Leslie B. Poole   +7 more
wiley   +1 more source