Results 101 to 110 of about 5,018,081 (294)

Chemical Characterization, Antioxidant and Enzyme‐Inhibitory Activities of Different Extracts from Three Phlomis Species

ChemistryOpen, EarlyView.
The tested Phlomis species are a rich source of bioactive molecules with potential therapeutic applications, and selecting appropriate extraction solvents is crucial for achieving the targeted biological activity. Phlomis species (family Lamiaceae) are highly valued as food and herbal medicine.
Sakina Yagi, Gokhan Zengin, Mehmet Veysi Cetiz, Zoltán Cziáky, József Jeko, Muammer Bahşi, Uğur Çakılcıoğlu, Halbay Turumtay, Abdurrahman Aktumsek   +8 more
wiley   +1 more source

Xanthurenic acid and its rôle in the trytophane metabolism of pyroxidine-deficient rats [PDF]

, 1943
In a previous publication (1) the isolation of a green pigment from the urine of pyridoxine-deficient rats was described. The green pigment was shown to be the product of a reaction between ferric ammonium sulfate or other ferric salts and a compound ...
Haagen-Smit, A. J., Lepkovsky, Samuel, Roboz, Elizabeth   +2 more
core  

Inhibiting tryptophan metabolism enhances interferon therapy in kidney cancer. [PDF]

, 2016
Renal cell carcinoma (RCC) is increasing in incidence, and a complete cure remains elusive. While immune-checkpoint antibodies are promising, interferon-based immunotherapy has been disappointing.
Abu Aboud, Omran, Anderson, Katie, Berryhill, Grace, Chen, Ching-Hsien, Graef, Ashley, Hovey, Russell C, Kim, Jeffrey, Modiano, Jaime F, Sarver, Aaron L, Stewart, Benjamin, Trott, Josephine F, Uzal, Francisco, Weiss, Robert H, Wettersten, Hiromi   +13 more
core   +2 more sources

Does kynurenic acid act on nicotinic receptors? An assessment of the evidence

Journal of Neurochemistry, 2019
As a major metabolite of kynurenine in the oxidative metabolism of tryptophan, kynurenic acid is of considerable biological and clinical importance as an endogenous antagonist of glutamate in the central nervous system. It is most active as an antagonist
T. Stone
semanticscholar   +1 more source

Synthesis and Transformations of Bioactive Scaffolds via Modified Mannich and aza‐Friedel–Crafts Reactions

The Chemical Record, EarlyView.
The stabilization of precursors substituted with 2‐, 1‐naphthol via partially aromatic ortho‐quinone methide intermediate was tested with different cyclic imines in [4+2] cycloaddition.8‐Hydroxyquinoline as a formal 1‐naphthol analogue in Mannich reaction was tested.The formed Mannich bases substituted with 2‐ and 1‐naphthol, 5‐chloro‐8 ...
Dóra Hegedűs, Nikoletta Szemerédi, Gabriella Spengler, István Szatmári   +3 more
wiley   +1 more source

Kynurenic Acid in Plasma and Endometrium in Bitches with Pyometra [PDF]

Inflammation, 2012
Kynurenic acid (KYNA) is produced enzymatically in humans and animals from kynurenine. Reports concerning changes of kynurenine metabolism during inflammation are available in the literature. Pyometra is a pathological condition characterized by the accumulation of pus in the uterine lumen and bacterial infection.
Tomasz Kocki, Roman Dąbrowski, Jolanta Parada-Turska, Marek Szczubiał, Wojciech Dąbrowski   +4 more
openaire   +3 more sources

Perturbations of tryptophan catabolism via the kynurenine pathway are associated with stage 2 postoperative outcomes in single ventricle heart disease

Physiological Reports
Preliminary evidence suggests perturbations of the kynurenine pathway (KP) of tryptophan metabolism in infants with single ventricle heart disease (SVHD). In 72 infants with SVHD undergoing stage 2 palliation (S2P) and 41 controls, we quantified serum KP
Jennifer Romanowicz, Sierra Niemiec, Ludmila Khailova, Tanner Lehmann, Christopher A. Mancuso, Max B. Mitchell, Gareth J. Morgan, Mark Twite, Michael V. DiMaria, Jelena Klawitter, Jesse A. Davidson, Benjamin S. Frank   +11 more
doaj   +1 more source

Age-related increase of kynurenic acid in human cerebrospinal fluid-IgG and beta(2)-microglobulin changes [PDF]

, 2005
Kynurenic acid (KYNA) is an endogenous metabolite in the kynurenine pathway of tryptophan degradation and is an antagonist at the glycine site of the N-methyl-D-aspartate as well as at the alpha 7 nicotinic cholinergic receptors. In the brain tissue KYNA
Baran, H, Ferraz-Leite, H, Kainz, A, Kalina, P, Kepplinger, B, Newcombe, J   +5 more
core  

KYNA Ameliorates Hepatic Ischemia–Reperfusion Injury by Activating the Hippo Signalling Pathway via FTO‐Dependent m6A Demethylation of LATS1

Cell Proliferation, EarlyView.
Our study elucidates the cellular and molecular mechanisms underlying KYNA's protective effects against HIRI. It emphasises that KYNA modulates the methylation status of the Hippo signalling pathway through the activation of AHR, thereby mitigating damage by promoting LATS1 degradation and facilitating the nuclear translocation of YAP. ABSTRACT Hepatic
Wenjie Zheng, Xiaowen Wang, Haoqi Chen, Kaiming He, Xijing Yan, Yuan Zhang, Yang Yang, Peng Zhang, Wenfeng Zhu, Shuguang Zhu, Hua Li   +10 more
wiley   +1 more source

The inimitable kynurenic acid: The roles of different ionotropic receptors in the action of kynurenic acid at a spinal level

Brain Research Bulletin, 2015
Kynurenic acid (KYNA) is a neuroactive metabolite that interacts with NMDA, AMPA/kainate and alpha 7 nicotinic receptors. The goal of this study was to clarify the roles of these receptors in the action of KYNA at a spinal level by using highly specific receptor antagonists alone or in triple combinations.
Gabor Tuboly, Lilla Tar, Zsuzsanna Bohar, Arpad Safrany-Fark, Zita Petrovszki, Gabriella Kekesi, Laszlo Vecsei, Arpad Pardutz, Gyongyi Horvath   +8 more
openaire   +4 more sources