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Study of cathelicidin (LL-37) immunoexpression in the skin of vitiligo patients.
Arch Dermatol Res
January 2025
Dermatology and Venereology Department, Faculty of Medicine, Tanta University, Tanta, Egypt.
Vitiligo is a pigmentary disorder acquired and caused by the loss or destruction of melanocytes from the epidermis. There is strong proof that vitiligo is mainly an autoimmune disease. Cathelicidin (LL37), an antimicrobial polypeptide, is an important part of the innate immune system and has a role in different skin autoimmune diseases.
View Article and Find Full Text PDFtRNA m1A modification regulates cholesterol biosynthesis to promote antitumor immunity of CD8+ T cells.
J Exp Med
March 2025
Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Activation of CD8+ T cells necessitates rapid metabolic reprogramming to fulfill the substantial biosynthetic demands of effector functions. However, the posttranscriptional mechanisms underpinning this process remain obscure. The transfer RNA (tRNA) N1-methyladenine (m1A) modification, essential for tRNA stability and protein translation, has an undefined physiological function in CD8+ T cells, particularly in antitumor responses.
View Article and Find Full Text PDFA novel polysaccharide in the envelope of influences the septal secretion of preproteins with a YSIRK/GXXS motif.
J Bacteriol
January 2025
Department of Microbiology, Howard Taylor Ricketts Laboratory, The University of Chicago, Chicago, Illinois, USA.
Unlabelled: Bacteria transport proteins across the plasma membrane to assemble their envelope, acquire nutrients, and establish appropriate interactions with their environment. The majority of these proteins are synthesized as precursors with a cleavable N-terminal signal sequence for recognition by the Sec machinery. In , a small subset of secreted precursors carries a YSIRK/GXXS motif.
View Article and Find Full Text PDFAllosteric regulation of pyruvate kinase enables efficient and robust gluconeogenesis by preventing metabolic conflicts and carbon overflow.
mSystems
January 2025
Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Gluconeogenesis, the reciprocal pathway of glycolysis, is an energy-consuming process that generates glycolytic intermediates from non-carbohydrate sources. In this study, we demonstrate that robust and efficient gluconeogenesis in bacteria relies on the allosteric inactivation of pyruvate kinase, the enzyme responsible for the irreversible final step of glycolysis. Using the model bacterium as an example, we discovered that pyruvate kinase activity is inhibited during gluconeogenesis via its extra C-terminal domain (ECTD), which is essential for autoinhibition and metabolic regulation.
View Article and Find Full Text PDFSynthesis and biological investigation of peptidomimetic SARS-CoV-2 main protease inhibitors bearing quinoline-based heterocycles at P.
Arch Pharm (Weinheim)
January 2025
Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy.
In the last few years, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been the cause of a worldwide pandemic, highlighting the need for novel antiviral agents. The main protease (M) of SARS-CoV-2 was immediately identified as a crucial enzyme for viral replication and has been validated as a drug target. Here, we present the design and synthesis of peptidomimetic M covalent inhibitors characterized by quinoline-based P moieties.
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