Results 51 to 60 of about 130,320 (304)

Bacteria-specific modified nucleoside is released and elevated in urine of patients with bacterial infections

mBio
Over 170 types of chemical modifications have been identified in cellular RNAs across the three domains of life. Modified RNA is eventually degraded to constituent nucleosides, and in mammals, modified nucleosides are released into the extracellular ...
Ryosuke Yamamura, Yu Nagayoshi, Kayo Nishiguchi, Hitomi Kaneko, Keiichi Yamamoto, Koki Matsushita, Miho Shimamura, Akihiro Kunisawa, Korin Sakakida, Takeshi Chujo, Masataka Adachi, Yutaka Kakizoe, Yuichiro Izumi, Takashige Kuwabara, Masashi Mukoyama, Kazuhito Tomizawa   +15 more
doaj   +1 more source

Enzymatic Synthesis of Highly Fluorescent 8-Azapurine Ribosides Using a Purine Nucleoside Phosphorylase Reverse Reaction: Variable Ribosylation Sites

Molecules, 2013
Various forms of purine-nucleoside phosphorylase (PNP) were used as catalysts of enzymatic ribosylation of selected fluorescent 8-azapurines. It was found that the recombinant calf PNP catalyzes ribosylation of 2,6-diamino-8-azapurine in a phosphate-free
Goran Mikleušević, Alicja Stachelska-Wierzchowska, Beata Wielgus-Kutrowska, Jacek Wierzchowski   +3 more
doaj   +1 more source

Targeting Post‐Irradiation Thyroid Dysfunction: Electrospun Scaffolds As A Dual‐Action Approach for Antioxidant and Immune Modulation

Advanced Healthcare Materials, EarlyView.
Radiation‐induced hypothyroidism follows head and neck radiotherapy due to oxidative stress and inflammation. Electrospun polycaprolactone scaffolds containing adenosine have potential to modulate thyroid repair. Scaffolds enhance thyrocyte proliferation, antioxidant enzymes glutathione peroxidase and catalase, reduce senescence and apoptosis markers ...
Maria Heim, Ella‐Louise Handley, Daniel Grant, Lizi M. Hegarty, Elaine Emmerson, Anthony Callanan   +5 more
wiley   +1 more source

Toward Multi(radio)metalated DNA: Enzymatic Polymerization of Metal‐Chelate‐Modified Deoxyribonucleoside Triphosphates

Angewandte Chemie, EarlyView.
This work presents the first enzymatic polymerization of defined metal‐chelator‐modified nucleotides that leverage polymerase fidelity for uniform (radio)metal loading with successful incorporation of five different metals: Ga, In, Tb, Lu, and Y.
Antonio A. W. L. Wong, François Bénard, David M. Perrin   +2 more
wiley   +2 more sources

Synthesis, Antiviral, and Antimicrobial Evaluation of Benzyl Protected Diversified C-nucleosides

Frontiers in Chemistry, 2018
Formyl glycals are the versatile synthetic intermediates and can serves as precursor for the synthesis of various C and N-nucleosides. Due to the presence of electron donating and electron withdrawing character on formyl sugars which makes the molecule ...
Ahmed Bari, Ahmed Bari, Syed S. Ali, Syed S. Ali, Amer M. Alanazi, Muhammad A. Mashwani, Abdulrahman M. Al-Obaid   +6 more
doaj   +1 more source

Methylated nucleosides in tRNA and tRNA methyltransferases

Frontiers in Genetics, 2014
To date, more than 90 modified nucleosides have been found in tRNA and the biosynthetic pathways of the majority of tRNA modifications include a methylation step(s).
H. Hori
semanticscholar   +1 more source

Cuproptosis and Mitophagy Mediated by the THUMPD1/IGF2R‐Dependent Suppression of AKT and Activation of AMPK Signaling Suppress Lung Adenocarcinoma Progression

Advanced Science, EarlyView.
THUMPD1 drives a tumor‐suppressive signaling cascade in lung adenocarcinoma by promoting IGF2R expression. IGF2R associates with PPP2R1A to suppress AKT and activate AMPK, leading to SLC31A1 upregulation and copper accumulation. Elevated copper disrupts mitochondrial metabolism and induces excessive mitophagy, thereby restraining tumor growth and ...
Kai Wu, Bo Qin, Zhuoyu Gu, Weizheng Ding, Xiaoming Chen, Kaishang Zhang, Yujin Qiao, Shuang Yuan, Song Zhao, Xiangnan Li, Peng Zhang   +10 more
wiley   +1 more source

Increasing TET Expression and 5‐Hydroxymethylcytosine Formation by a Carbocyclic 5‐Aza‐2′‐deoxy‐cytidine Antimetabolite

Angewandte Chemie, EarlyView.
The carbocyclic Decitabine analog (cAzadC) incorporates as an antimetabolite weakly into the genome of growing tumor cells, where it triggers a genome‐wide demethylation and a surprisingly strong hydroxymethylation of cytosine, which translates into an efficient in vivo antitumor (AML) effect.
Maike Däther, Elsa Peev, Annika Fröhlich, Binje Vick, Sogol Fatourechi, Gilles Gasparoni, Matthias Heiss, Corinna C. Pleintinger, Emmanuel Asu Bisong, Hans Hurmiz, Davide Guglielminotti, Yasmin V. Gärtner, Tina Aumer, Karsten Spiekermann, Jörn Walter, Irmela Jeremias, Franziska R. Traube, Thomas Carell   +17 more
wiley   +2 more sources

An Aminoisoxazole‐Based Proto‐RNA

ChemistryEurope, 2023
The RNA world hypothesis predicts that life started with the development of replicating and catalytically active RNA, which evolved in a process of molecular evolution to increasingly complex chemical structures.
Felix Xu, Dr. Stefan Wiedemann, Dr. Jonas Feldmann, Dr. Sidney Becker, Prof. Dr. Thomas Carell   +4 more
doaj   +1 more source

A Circuit of Mechanically Regulated Transcription Factors Balances Regenerative and Fibrotic Memory of Mesenchymal Stromal Cells

Advanced Science, EarlyView.
Producing MSCs on rigid culture substrates induces a scar‐making phenotype, jeapordizing therapeutic success. ‘Tissue‐soft’ surfaces prevent MSC fibrogenesis and preserve regenerative traits. An epigenetic network, driven by HOXA11 and SALL1, maintains ‘soft memory’ by keeping chromatin open in relaxed MSCs, promoting anti‐fibrotic programs.
Fereshteh Sadat Younesi, Andrew E. Miller, Li Diao, Xinying Guo, Natalie Andonian, Elham Karimizadeh, Thomas H. Barker, Boris Hinz   +7 more
wiley   +1 more source