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Exploring the Ascorbate Requirement of the 2-Oxoglutarate-Dependent Dioxygenases.
J Med Chem
January 2025
Ma̅tai Ha̅ora - Centre for Redox Biology and Medicine, Department of Biomedical Science and Pathology, University of Otago, Christchurch, Christchurch 8140, New Zealand.
In humans, the 2-oxoglutarate-dependent dioxygenases (2-OGDDs) catalyze hydroxylation reactions involved in cell metabolism, the biosynthesis of small molecules, DNA and RNA demethylation, the hypoxic response and the formation of collagen. The reaction is catalyzed by a highly oxidizing ferryl-oxo species produced when the active site non-heme iron engages molecular oxygen. Enzyme activity is specifically stimulated by l-ascorbic acid (ascorbate, vitamin C), an effect not well mimicked by other reducing agents.
View Article and Find Full Text PDFSerial Total Bile Acid Measurements in Intrahepatic Cholestasis of Pregnancy.
Obstet Gynecol
January 2025
Department of Obstetrics, Gynecology and Reproductive Science, University of California, San Diego, San Diego, California; and the Department of Obstetrics, Gynecology and Reproductive Science, Mount Sinai Health System & Icahn School of Medicine at Mount Sinai, New York, and the Department of Obstetrics, Gynecology and Reproductive Science, New York City Health and Hospitals - Elmhurst Hospital Center, Elmhurst, New York.
Although peak serum total bile acid (TBA) levels guide management of intrahepatic cholestasis of pregnancy (ICP), whether ICP progresses in severity and when or how to assess bile acid levels serially remains unclear. We conducted a secondary analysis of a single-institution retrospective cohort study to assess bile acid trends across pregnancy among individuals diagnosed with ICP and to evaluate whether there was progression to higher ICP severity. We defined ICP severity as mild (peak TBA less than 40 micromol/L), moderate (peak TBA between 40 and 100 micromol/L), or severe (peak TBA 100 micromol/L or greater).
View Article and Find Full Text PDFTreatment and Outcomes of Pancreatic Cancer in Armenia: A Retrospective Study From Resource-Limited Settings.
JCO Glob Oncol
January 2025
Adults Solid Tumors Chemotherapy Department, Yeolyan Hematology and Oncology Center, Yerevan, Armenia.
Purpose: Pancreatic cancer is one of the deadliest cancers in the world. In Armenia, it is 12th by incidence. The aim of this study is to evaluate treatment and outcomes of pancreatic cancer in Armenia during the past 12 years.
View Article and Find Full Text PDFStereoselective Copper-Catalyzed Cross-Coupling of α-CF-Allylboronic Acids with Diazoketones.
J Org Chem
January 2025
Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden.
We have studied copper-catalyzed cross-coupling of chiral α-CF-substituted allylboronic acids with α-diazoketones. The reaction proceeds with excellent regioselectivity and stereoselectivity via allylic rearrangement. The method is useful for formation a new allylic C(sp)-C(sp) bond with high selectivity.
View Article and Find Full Text PDFIn 2021, a year before ChatGPT took the world by storm amid the excitement about generative artificial intelligence (AI), AlphaFold 2 cracked the 50-year-old protein-folding problem, predicting three-dimensional (3D) structures for more than 200 million proteins from their amino acid sequences. This accomplishment was a precursor to an unprecedented burgeoning of large language models (LLMs) in the life sciences. That was just the beginning.
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