Using a two-site enzyme immunoassay, we determined the content of type II protein kinase C (PKC) in human platelets from 24 donors of various ages without any neurological, hematological or malignant disorders. The content of type II PKC in the membranous fraction was positively correlated with aging. The content of PKC in the cytosolic fraction tended to decline with aging, but the correlation was not significant. The total amount of PKC also had no significant correlation with aging. Age-related changes in platelet protein content were not observed. These results suggested that the subcellular distribution of type II PKC in human platelets is altered with normal aging.
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http://dx.doi.org/10.1016/0047-6374(93)90077-5 | DOI Listing |
PLoS One
January 2025
Department of Orthopedics, Faculty of Medicine, Nigde Omer Halisdemir University, Nigde, Turkey.
Background: Predicting mortality and morbidity poses a significant challenge to physicians, leading to the development of various scoring systems. Among these, the hemoglobin, albumin, lymphocyte and platelet (HALP) score evaluates a patient's nutritional and immune status. The primary aim of this study was to determine the predictive effect of the HALP score on 30-day and 1-year mortality in elderly patients with proximal femoral fractures (PFFs).
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of São Paulo Universidade de São Paulo, São Paulo, Brazil.
Background: The Down Syndrome (DS), also referred to as trisomy of chromosome 21, is a prevalent cause of intellectual disability and also contributes to the acceleration of aging, among other developmental and health concerns. Certain pathological characteristics shared by DS and Alzheimer's Disease (AD) indicate similar commonalities. This study aims to unravel the relationship between the canonical Wnt/pathway, the amyloid precursor protein processing, the telomere shortening in DS individuals.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of Kansas Alzheimer's Disease Research Center, Fairway, KS, USA.
Background: Plasma biomarkers show a promising future to improving the quality of diagnosing Alzheimer's Disease (AD). However, blood processing procedures should be considered when measuring plasma biomarkers. Here we investigate brain-derived neurotrophic factor (BDNF) in platelet-rich and platelet-poor plasma.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Laboratory of Neuroscience (LIM27), Departamento e Instituto de Psiquiatria, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil.
Background: Due to the genetic characteristics of Down syndrome (DS), it is directly associated with a group of clinical manifestations resulting from premature aging and may present patterns of Alzheimer's disease (AD). Thus, this study aimed to investigate AD biological markers in peripheral blood samples from adults and elderly individuals with DS and compare them with individuals with normal karyotype.
Methods: The DS group was subclassified into 55 SD without evidence of cognitive decline (DSNC) and 27 DS with cognitive decline (SDAD).
Alzheimers Dement
December 2024
Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Background: The association between platelet endothelial cell adhesion molecule-1 (PECAM-1) with cerebral small vessel disease (CSVD) and cognition in non-demented subjects remains un-investigated.
Method: A longitudinal, prospective cohort of subjects recruited from memory clinics was followed-up for 5 years. Non-demented subjects were included and classified as no cognitive impairment (NCI) or mild cognitive impairment (MCI).
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