Sixty-one isolates of Candida albicans were tested for their phospholipase activity and this parameter was correlated with pathogenicity in albino mice. Of the isolates tested, 57 (93%) showed appreciable phospholipase activity and of these, 55 (90%) were pathogenic to mice. A significant correlation was found between phospholipase activity and involvement of kidneys in animal pathogenicity studies. The isolates of C. albicans, that exhibited higher phospholipase activity were found to be pathogenic for mice.
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http://dx.doi.org/10.1099/00222615-47-2-99 | DOI Listing |
Vet Res Commun
January 2025
Soil Science Faculty, Lomonosov Moscow State University, Moscow, 119234, Russia.
Extracellular hydrolytic activity (phospholipase, protease and hemolysin production) was evaluated in 178 strains of potentially pathogenic ascomycetous (Candida parapsilosis, Candida tropicalis) and basidiomycetous (Rhodotorula mucilaginosa) yeasts isolated from the excreta of Mew Gulls. Two bird colonies, one nesting in a natural habitat and the other in an urban habitat at the landfill, were studied simultaneously during their 7-month breeding season. Significant differences in phospholipase and protease production were found between natural and anthropophized strains.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
USC School of Pharmacy, Los Angeles, CA, USA.
Background: Cellular senescence is a hallmark of aging and has been implicated in several neurodegenerative diseases including Alzheimer's disease (AD). Senescence cells undergo changes in gene expression and metabolism and can exhibit a so-called "senescence-associated secretory phenotype" (SASP) characterized by increased secretion of pro-inflammatory molecules and factors which can damage nearby cells, contributing to AD pathology progression.
Method: In this study, we determined mechanisms of cellular senescence using human postmortem brain samples, cellular models, and APOE4 animal models.
Alzheimers Dement
December 2024
University of Southern California, Los Angeles, CA, USA.
Background: Synaptic loss predicts cognitive decline in Alzheimer's disease (AD). However, the critical disease modifying molecular mechanisms of synaptic failure remain elusive. Animal studies implicate the increased activation of cytosolic phospholipase (cPLA2) activation in synaptic loss and neuroinflammation.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Vanderbilt University Medical Center, Nashville, TN, USA.
Background: Genome-wide association studies suggest mutations in endolysosomal genes are linked to Alzheimer's disease (AD). Defective lysosomal function has been corroborated as a feature of AD by neuropathological and cell biology studies. PLD3 is a homolog of the phospholipase D family localized to lysosomes.
View Article and Find Full Text PDFTrans R Soc Trop Med Hyg
January 2025
Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501, Costa Rica.
Background: The genus Metlapilcoatlus was recently erected to include six species of stout venomous snakes, known as the jumping pitvipers, which inhabit mountainous areas of Mesoamerica. This group maintains affinity with Atropoides picadoi, another jumping pitviper with restricted distribution in Costa Rica and Panama. Although the venom of A.
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