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Inducible engineering precursor metabolic flux for synthesizing hyaluronic acid of customized molecular weight in Streptococcus zooepidemicus.
Microb Cell Fact
January 2025
MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China.
Background: Hyaluronic acid (HA) is extensively employed in various fields such as medicine, cosmetics, food, etc. The molecular weight (MW) of HA is crucial for its biological functions. Streptococcus zooepidemicus, a prominent HA industrial producer, naturally synthetizes HA with high MW.
View Article and Find Full Text PDFBiofunctionalized patterned platform as microarray biochip to supervise delivery and expression of pDNA nanolipoplexes in stem cells via mechanotransduction.
J Nanobiotechnology
January 2025
School of Medicine, Shanghai University, Shanghai, 200444, China.
Biochips are widely applied to manipulate the geometrical morphology of stem cells in recent years. Patterned antenna-like pseudopodia are also probed to explore the influence of pseudopodia formation on gene delivery and expression on biochips. However, how the antenna-like pseudopodia affect gene transfection is unsettled and the underlying trafficking mechanism of exogenous genes in engineered single cells is not announced.
View Article and Find Full Text PDFThe widely used Ucp1-Cre transgene elicits complex developmental and metabolic phenotypes.
Nat Commun
January 2025
Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Bacterial artificial chromosome transgenic models, including most Cre-recombinases, enable potent interrogation of gene function in vivo but require rigorous validation as limitations emerge. Due to its high relevance to metabolic studies, we perform comprehensive analysis of the Ucp1-Cre line which is widely used for brown fat research. Hemizygotes exhibit major brown and white fat transcriptomic dysregulation, indicating potential altered tissue function.
View Article and Find Full Text PDFExploring stress hormone effects on memory specificity and strength in mice using the dual-event inhibitory avoidance task.
Learn Mem
January 2025
Department of Cognitive Neuroscience, Radboud university medical center, 6500 HB Nijmegen, The Netherlands
Stressful and emotionally arousing experiences induce the release of noradrenergic and glucocorticoid hormones that synergistically strengthen memories but differentially regulate qualitative aspects of memory. This highlights the need for sophisticated behavioral tasks that allow for the assessment of memory quality. The dual-event inhibitory avoidance task for rats is such a behavioral task designed to evaluate both the strength and specificity of memory.
View Article and Find Full Text PDFLarge donor CRISPR for whole-CDS replacement of cell adhesion molecule LRRTM2.
J Neurosci
January 2025
Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA
The cell adhesion molecule Leucine-Rich Repeat Transmembrane neuronal protein 2 (LRRTM2) is crucial for synapse development and function. However, our understanding of its endogenous trafficking has been limited due to difficulties in manipulating its coding sequence (CDS) using standard genome editing techniques. Instead, we replaced the entire LRRTM2 CDS by adapting a two-guide CRISPR knock-in method, enabling complete control of LRRTM2.
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