Results 131 to 140 of about 201,939 (380)

Simvastatin overcomes the pPCK1‐pLDHA‐SPRINGlac axis‐mediated ferroptosis and chemo‐immunotherapy resistance in AKT‐hyperactivated intrahepatic cholangiocarcinoma

open access: yesCancer Communications, EarlyView.
Abstract Background Intrahepatic cholangiocarcinoma (ICC) is a challenging cancer with an increasing incidence. The Phase III TOPAZ‐1/KEYNOTE‐966 study demonstrated chemo‐immunotherapy (CIT) as a significant advancement, potentially replacing traditional chemotherapy for advanced biliary tract cancer.
Jinghan Zhu   +12 more
wiley   +1 more source

Enzymic Synthesis of Xanthosine- and Guanosine-5-phosphate from Inosine-5-phosphate. [PDF]

open access: bronze, 1955
Ulf Lagerkvist   +3 more
openalex   +1 more source

Control of Nucleotide Metabolism and Ribosomal Ribonucleic Acid Synthesis During Nitrogen Starvation of \u3cem\u3eEscherichia coli\u3c/em\u3e [PDF]

open access: yes, 1972
Ribosomal ribonucleic acid (RNA) synthesis and ribonucleoside triphosphate metabolism were studied in cultures of Escherichia coli subjected to starvation for inorganic nitrogen.
Irr, Joseph D.
core   +1 more source

Methods for Controlling Small GTPase Activity

open access: yesChemBioChem, EarlyView.
This concept highlights recent and emerging methods for controlling small GTPase activity, encompassing both small‐molecule‐based approaches and protein engineering strategies. The use of these approaches to advance the understanding of small GTPase function, current limitations, and future outlook is discussed.
Benjamin Faulkner   +3 more
wiley   +1 more source

The Link between Purine Metabolism and Production of Antibiotics in Streptomyces

open access: yesAntibiotics, 2019
Stress and starvation causes bacterial cells to activate the stringent response. This results in down-regulation of energy-requiring processes related to growth, as well as an upregulation of genes associated with survival and stress responses. Guanosine
Smitha Sivapragasam, Anne Grove
doaj   +1 more source

Cyclic guanosine monophosphate as a mediator of vasodilation.

open access: yesJournal of Clinical Investigation, 1986
Although cyclic guanosine monophosphate (GMP)' was first described in biological samples more than two decades ago, its role in some physiological processes has only become apparent in the past few years (see references 1-4).
F. Murad
semanticscholar   +1 more source

Synthesis of Nucleoside Derivatives by Biomimetic Ester Migration

open access: yesChemBioChem, EarlyView.
In tRNA aminoacylated nucleosides represent the central transfer unit of amino acids. An occurring 2′‐3′‐transaminoacylation is biomimetically exploited to successfully synthesize nucleosidic acid esters. This approach can be further expanded on sulfonic acid esters, which has the potential of a broad range of stereo‐ and regio‐controlled modifications
Nathalie J. Kurrle   +8 more
wiley   +1 more source

Inability of Guanosine to Act as a Precursor of Polynucleotides. [PDF]

open access: bronze, 1950
E. Hammarsten   +3 more
openalex   +1 more source

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