The gene responsible for the uncommon glutamate dehydrogenase (GDH) activity of Lactococcus lactis was identified and characterized. It encodes a GDH of family I that is mainly active in glutamate biosynthesis, is carried by a large plasmid, and is included, with functional cadmium resistance genes, in a remnant Tn3-like transposon.
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http://dx.doi.org/10.1128/JB.187.14.5019-5022.2005 | DOI Listing |
Transplant Proc
January 2025
Experimental Pathology Department, Institut d'Investigacions Biomèdiques de Barcelona (IIBB)-CSIC, Barcelona, Spain; Steatohepatitis and Liver Transplant, Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), CIBER ehd, Barcelona, Spain.
Static cold storage remains the traditional standard for liver graft preservation prior to transplantation in both clinical and experimental settings. The use of polyethylene glycol 35 solutions, such as Institut Georges Lopez-2 (IGL2) preservation solution, for protecting against mitochondrial damage during cold static preservation necessitates combination with hypothermic oxygenated perfusion to enhance liver graft performance. This study presents a preliminary comparative evaluation of "danger signals" indicating hepatocellular injury (transaminases, lactate content), mitochondrial damage (glutamate dehydrogenase release), and cytokine release in liver perfusates from suboptimal grafts (fatty livers) subjected to 24-hour cold storage.
View Article and Find Full Text PDFAnn Biol Clin (Paris)
January 2025
Laboratoire Clostridioides difficile associé au Centre National de Référence des bactéries anaérobies et du botulisme, Hôpital Saint-Antoine, Assistance Publique Hôpitaux de Paris, 184 rue du Faubourg Saint-Antoine, 75012 Paris France, UMR-S 1139 3PHM, Université Paris Cité, Paris, France.
Clostridioides difficile is a Gram-positive, spore-forming anaerobic enteropathogen responsible for a wide spectrum of clinical diseases ranging from mild diarrhoea to pseudomembranous colitis. It is the first cause of healthcare-associated diarrhoeas, but community-associated Clostridioides difficile infections (CDI) are increasingly reported in patients without the common risk factors (age > 65 years, previous antibiotic treatment). The main C.
View Article and Find Full Text PDFSci Transl Med
January 2025
Department of Colorectal Surgery (General Surgery), Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.
The tumorigenesis of colorectal cancer (CRC) often follows the normal-adenoma-carcinoma (N-A-C) sequence. However, the molecular mechanisms underlying colorectal adenoma carcinogenesis remain largely unknown. Here, we analyzed transcriptomic profile changes in normal, advanced adenoma, and carcinoma tissues from patients with CRC, revealing that glutamic-pyruvic transaminase 1 () in colorectal tissues was down-regulated during the N-A-C process and correlated with poor CRC prognosis.
View Article and Find Full Text PDFDev Cell
December 2024
State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China. Electronic address:
The neurotransmitter gamma-aminobutyric acid (GABA) has been thought to be involved in the development of some types of cancer. Yet, the de novo synthesis of GABA and how it functions in hepatocellular carcinoma (HCC) remain unclear. Here, we report that SLC6A12 acts as a transporter of GABA, and that aldehyde dehydrogenase 9 family member A1 (ALDH9A1), not glutamate decarboxylase 1 (GAD1), generates GABA in human HCC.
View Article and Find Full Text PDFAdv Sci (Weinh)
December 2024
State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian, Liaoning, 116024, China.
Cofactors such as nicotinamide adenine dinucleotide (NADH) and its phosphorylated form (NADPH) play a crucial role in natural enzyme-catalyzed reactions for the synthesis of chemicals. However, the stoichiometric supply of NADH for artificial synthetic processes is uneconomical. Here, inspired by the process of cofactor NADPH regeneration in photosystem I (PSI), catalyst-modified photocathodes are constructed on the surface of polythiophene-based semiconductors (PTTH) via self-assembly for photoelectrochemical catalytic NADH regeneration.
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