The intracellular activity and extracellular release (basal and latex-stimulated) of B-glucuronidase (BG) and N-acetylglucosaminidase (NAG), measured fluorimetrically, were observed to be significantly (P < 0.05) higher in blood monocytes (BM) of untreated pulmonary tuberculosis (TB) patients compared to those of age- and sex-matched controls and Mantoux-positive subjects without any evidence of active disease. After completion of antituberculous therapy, BG and NAG activities declined appreciably (P < 0.05) and their levels became comparable to those in control subjects. The present results suggest the potentiation of the oxygen-independent defense mechanism of BM in pulmonary TB.
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http://dx.doi.org/10.1111/j.1699-0463.1993.tb00080.x | DOI Listing |
Front Oncol
January 2025
Department of Stomatology, Tianjin First Central Hospital, Tianjin, China.
Oral squamous cell carcinoma (OSCC) accounts for approximately 90% of all oral cancers, significantly impacting the survival and quality of life of patients. Exosomes, small extracellular vesicles released by cells, play a crucial role in intercellular communication in cancer. Nevertheless, their function and mechanism in OSCC remain elusive.
View Article and Find Full Text PDFFront Immunol
January 2025
International Collaboration on Repair Discoveries (ICORD) Centre, Vancouver Coastal Health Research Institute (VCHRI), University of British Columbia (UBC), Vancouver, BC, Canada.
Keloid scars (KS) and hypertrophic scars (HS) are fibroproliferative wound healing defects characterized by excessive accumulation of extracellular matrix (ECM) in the dermis of affected individuals. Although transforming growth factor (TGF)-β is known to be involved in the formation of KS and HS, the molecular mechanisms responsible for its activation remain unclear. In this study we investigated Granzyme B (GzmB), a serine protease with established roles in fibrosis and scarring through the cleavage of ECM proteins, as a potential new mediator of TGF-β activation in KS and HS.
View Article and Find Full Text PDFVet Res
January 2025
Animal Health Unit, Department of Veterinary Science, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan.
Mycoplasma pneumonia, caused by Mycoplasma bovis (Mycoplasmopsis bovis; M. bovis), is linked with severe inflammatory reactions in the lungs and can be challenging to treat with antibiotics. Biofilms play a significant role in bacterial persistence and contribute to the development of chronic lesions.
View Article and Find Full Text PDFJ Nanobiotechnology
January 2025
Krefting Research Centre, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine at Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Extracellular vesicles (EVs) are taken up by most cells, however specific or preferential cell targeting remains a hurdle. This study aims to develop an EV that targets cells involved in inflammation, specifically those expressing intercellular adhesion molecule-1 (ICAM-1). To target these cells, we overexpress the ICAM-1 binding receptor "lymphocyte function-associated antigen-1" (LFA-1) in HEK293F cells, by sequential transfection of plasmids of the two LFA-1 subunits, ITGAL and ITGB2 (CD11a and CD18).
View Article and Find Full Text PDFBMC Oral Health
January 2025
Department of Stomatology, School of Medicine, Xiamen University, Xiamen, China.
Background: To investigate the antibiofilm effect and mechanism of the silver nanowire (AgNW)-modified glass ionomer cement (GIC) against multi-species oral biofilm, and to examine the mechanical and biochemical properties of this novel GIC material.
Methods: Conventional GIC was incorporated with different concentrations of AgNW and silver nanoparticles (AgNP). Multi-species biofilms of Streptococcus mutans, Streptococcus sobrinus, Lactobacillus fermentum, and Lactobacillus rhamnosus were cultured for 72 h on GIC specimens.
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