The polymerase chain reaction (PCR) and the ligase chain reaction (LCR) were evaluated and compared on 55 gynecological samples collected from women with active gynecological tuberculosis (Group 1), gynecological diseases other than tuberculosis (Group 2), and active tuberculosis elsewhere in the body without evidence for gynecological tuberculosis (Group 3). Acid fast staining and culture of Mycobacteria appeared to be ineffective in all specimens. The sensitivity of both amplification methods was 94.7% (one of the 19 patients with non-tuberculosis). The LCx method showed a very high inhibition by specimens (64.1% of negative samples versus 16.7% for PCR and LCx could be useful tools in the diagnosis of gynecological tuberculosis.
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Biochemistry
January 2025
Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States.
The exterior surface of the human pathogen is coated with a capsular polysaccharide (CPS) that consists of a repeating sequence of 2-5 different sugars that can be modified with various molecular decorations. In the HS:2 serotype from strain NCTC 11168, the repeating unit within the CPS is composed of d-ribose, -acetyl-d-galactosamine, and a d-glucuronic acid that is further amidated with either serinol or ethanolamine. The d-glucuronic acid moiety is also decorated with d-glycero-l-gluco-heptose.
View Article and Find Full Text PDFBiochemistry
January 2025
Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States.
is the leading cause of food poisoning in Europe and North America. The exterior surface of this bacterium is encased by a capsular polysaccharide that is attached to a diacyl glycerol phosphate anchor via a poly-Kdo (3-deoxy-d--oct-2-ulosinic acid) linker. In the HS:2 serotype of NCTC 11168, the repeating trisaccharide consists of d-ribose, -acetyl-d-glucosamine, and d-glucuronate.
View Article and Find Full Text PDFChempluschem
January 2025
University of Vienna, Faculty of Chemistry, Währinger Str. 17, 1090, Vienna, AUSTRIA.
The Lewis acid-catalyzed coupling of alkenes and aldehydes presents a modern, versatile synthetic alternative to classical carbonyl addition chemistry, offering exceptional regio- and stereoselectivity. In this work, we present a comprehensive computational investigation into the reaction mechanism of this transformation. Our findings confirm the occurrence of an enantioselective trans-annular [1,5]-hydride shift step and demonstrate that the enantioselectivity of the reaction arises predominantly from steric clashes between functional groups in the cyclization step.
View Article and Find Full Text PDFElife
December 2024
Laboratory of Immunoregulation and Mucosal Immunology, VIB Center for Inflammation Research, Ghent, Belgium.
Since the precursor frequency of naive T cells is extremely low, investigating the early steps of antigen-specific T cell activation is challenging. To overcome this detection problem, adoptive transfer of a cohort of T cells purified from T cell receptor (TCR) transgenic donors has been extensively used but is not readily available for emerging pathogens. Constructing TCR transgenic mice from T cell hybridomas is a labor-intensive and sometimes erratic process, since the best clones are selected based on antigen-induced CD69 upregulation or IL-2 production in vitro, and TCR chains are polymerase chain reaction (PCR)-cloned into expression vectors.
View Article and Find Full Text PDFPLoS One
January 2025
Université Paris Cité, IRD, MERIT, F-75006, Paris, France.
Introduction: Recently, efforts to eliminate malaria have shifted focus from symptomatic cases alone to include asymptomatic carriers, who are now recognized as significant contributors to the disease's transmission and control. This study examines the relationship between asymptomatic malaria infection and hemoglobin levels in Benin.
Methods: A cohort in Benin was enrolled and categorized into three age groups (under 5 years, 5-15 years, and over 15 years) for follow-up from August to November 2021.
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