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Epithelial OPA1 links mitochondrial fusion to inflammatory bowel disease.
Sci Transl Med
January 2025
Department of Medicine 1, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, 91052 Erlangen, Germany.
Dysregulation at the intestinal epithelial barrier is a driver of inflammatory bowel disease (IBD). However, the molecular mechanisms of barrier failure are not well understood. Here, we demonstrate dysregulated mitochondrial fusion in intestinal epithelial cells (IECs) of patients with IBD and show that impaired fusion is sufficient to drive chronic intestinal inflammation.
View Article and Find Full Text PDFStructure of transmembrane AMPA receptor regulatory protein subunit γ2.
Nat Commun
January 2025
Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
Transmembrane AMPA receptor regulatory proteins (TARPs) are claudin-like proteins that tightly regulate AMPA receptors (AMPARs) and are fundamental for excitatory neurotransmission. With cryo-electron microscopy (cryo-EM) we reconstruct the 36 kDa TARP subunit γ2 to 2.3 Å, which points to structural diversity among TARPs.
View Article and Find Full Text PDFMorphometrics and First Ultrastructural Characterizations of Intra-Erythrocytic Stages of So-Called Haemogregarina damiettae Ramadan et al. (1996) With Special Reference to Its Cytopathological Effects on the Infected Erythrocytes.
Microsc Res Tech
January 2025
Department of Zoology and Entomology, Faculty of Science, Helwan University, Helwan, Egypt.
The current study provides the first ultrastructural observations on the intraerythrocytic stages of so-called Haemogregarina damiettae and their cytopathological effects on the infected erythrocytes (IEs) in addition to the recording of new morphometric data. The intraerythrocytic stages are attributed to the immature forms or trophozoites (Ts), and mature gamonts (Gs). Ts are typically bowling-bottle shaped with nucleus (TN) occupying its globose part, while Gs are typically banana- shaped.
View Article and Find Full Text PDFImaging the Ultrastructure of Isolated Peptidoglycan Sacculi from Rod-Shaped J99 Cells by Atomic Force Microscopy.
Molecules
January 2025
Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, 48149 Münster, Germany.
Peptidoglycan is the basic structural polymer of the bacterial cell wall and maintains the shape and integrity of single cells. Despite years of research conducted on peptidoglycan's chemical composition, the microscopic elucidation of its nanoscopic architecture still needs to be addressed more thoroughly to advance knowledge on bacterial physiology. Apart from the model organism , ultrastructural imaging data on the murein architecture of Gram-negative bacteria is mostly missing today.
View Article and Find Full Text PDFInhibition of Unc-51-like-kinase is mitoprotective during infection in corneal epithelial cells.
mSphere
January 2025
Departments of Ophthalmology, The University of Texas Southwestern Medical Center, Dallas, Texas, USA.
(PA) is an opportunistic gram-negative pathogen that can infect the cornea, leading to permanent vision loss. Autophagy is a cannibalistic process that drives cytoplasmic components to the lysosome for degradation and/or recycling. Autophagy has been shown to play a key role in the removal of intracellular pathogens and, as such, is an important component of the innate immune response.
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