The structure of globomycin has been determined by mass, PMR and CMR spectra and by chemical degradation. Globomycin is a new cyclic peptide antibiotic composed of L-serine, L-allo-threonine, glycine, N-methylleucine, L-allo-isoleucine and 3-hydroxy-2-methylnonaic acid. Among these components, L-allo-threonine, L-allo-isoleucine and 3-hydroxy-2-methylnonaic acid are novel components from natural products. A newly developed mass analysis has been introduced for determining the diastereoisomers of allo-threonine.
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http://dx.doi.org/10.7164/antibiotics.31.426 | DOI Listing |
Alzheimers Dement
December 2024
The University of Arizona - Tucson, Tucson, AZ, USA.
Background: Host commensal gut microbes are shown to be crucial for microglial maturation, and functions that involve innate immune responses to maintain brain homeostasis. Sex has a crucial role in the incidence of neurological diseases with females showing higher progression of AD compared with males. Transcriptomics has been a powerful tool for the characterization of microglial phenotypes however, there is a large gap in relating to their functional protein abundances.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom.
Background: Cardiovascular disease causes vascular dementia and contributes to most clinical dementia. This is embodied in the concept of vascular contributions to cognitive impairment and dementia (VCID). The potent endogenous peptide endothelin-1 (ET1) causes small artery vasoconstriction and fibrosis.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of Washington School of Medicine, Seattle, WA, USA.
Background: A drug cocktail targeting different processes of aging was tested in an aging mouse model of Alzheimer's disease (AD) neuropathologic change as an intervention to improve behaviors corresponding to cognitive dysfunction in AD.
Method: A cocktail of acarbose/rapamycin/phenylbutyrate or a control treatment was administered (medicated vs. non-medicated chow) chronically to 22 months-old mice that received viral vector injections to induce amyloid and tau pathology in the hippocampus at 24 months of age.
Alzheimers Dement
December 2024
University of Missouri, Columbia, MO, USA.
Background: The link between stroke and Alzheimer's disease (AD) is recognized. However, the underlying mechanisms are not yet clear. This study seeks to determine if increased AD risk is linked to gut dysbiosis caused by acute ischemic stroke.
View Article and Find Full Text PDFBMC Infect Dis
January 2025
Department of Pharmacy, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Key Laboratory of Assessment of Clinical Drugs Risk and Individual Application Beijing Hospital, Beijing, 100730, P.R. China.
Objectives: Drug-induced thrombocytopenia has been reported for numerous drugs. Vancomycin-induced thrombocytopenia (VIT) is infrequently and often under-recognized. VIT can lead to the serious consequences of some life-threatening bleeding, especially in high-risk population.
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