Background: CORNEAS NEEDED FOR KERATOPLASTY CAN BE HARVESTED USING TWO TECHNIQUES: whole globe enucleation and in situ excision of the corneoscleral disc. This study evaluates the rate of microbial contamination of the donor cornea organ culture medium according to the method of retrieval.
Methods: All donor corneas of our cornea bank received between January 1, 2001 and December 31, 2009 put into organ culture and microbio-logically tested were prospectively analyzed for microbial contamination of the organ culture medium.
Results: 2,805 donor corneas could be included in this study in total. 975 of them were retrieved by whole globe enucleation (group 1) and 1,830 by in situ corneoscleral disc excision (group 2). 15 corneas of group 1 (1.5%) and 46 corneas of group 2 (2.5%) showed a contamination of the organ culture medium. The difference was shown not to be statistically significant (p = 0.082).
Conclusion: The rate of microbial contamination in organ-cultured donor corneas does not seem to be dependent on the method of their retrieval.
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http://dx.doi.org/10.1159/000345717 | DOI Listing |
Alzheimers Dement
December 2024
University of Florida College of Medicine, Gainesville, FL, USA.
Background: The presence of Tau pathology is strongly associated with the clinical symptoms and cognitive decline found in Alzheimer's disease (AD), suggesting that targeting pathological tau may be a more effective therapeutic approach. Microglia have been implicated in tauopathies as their activation is strongly related to the progression of tau phosphorylation and aggregation potentially due to dysfunctional lysosomal activity. Cannabinoid type 2 receptors (CB2) are highly expressed in immune cells and upregulated in activated microglia under conditions of neurologic disease, such as AD.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Centre for Discovery Brain Sciences at the University of Edinburgh, Edinburgh, Scotland, United Kingdom.
Background: Maintaining synaptic health is essential for normal neurological function, yet neurodegenerative diseases like Alzheimer's disease and Progressive Supranuclear Palsy (PSP) exhibit synaptic loss. In these conditions, synaptic loss precedes neuronal degeneration, and the degree of synaptic loss correlates closely with the severity of clinical symptoms. Both Aβ, which accumulates in amyloid plaques in AD, and tau protein which accumulates intracellularly in tauopathies, including AD and PSP, accumulate within synaptic terminals.
View Article and Find Full Text PDFInfect Dis (Lond)
January 2025
Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
Background: Although recommended isolation periods for Coronavirus disease 2019 (COVID-19) have been shortened as the pandemic has subsided, prolonged Severe Acute Respiratory Syndrome-Coronavirus-2 (SARS-CoV-2) shedding remains common in immunocompromised patients. This study estimated the probability of viral clearance in these patients based on elapsed days and specific risk factors.
Methods: We prospectively enrolled immunocompromised patients with a confirmed COVID-19 diagnosis from January 2022 to May 2023 during the Omicron variant era.
Front Bioeng Biotechnol
December 2024
Department of Breast and Endocrine Surgery, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea.
Unlabelled: 3D cell culture is gaining momentum in medicine due to its ability to mimic real tissues () and provide more accurate biological data compared to traditional methods. This review explores the current state of 3D cell culture in medicine and discusses future directions, including the need for standardization and simpler protocols to facilitate wider use in research.
Purpose: 3D cell culture develops life sciences by mimicking the natural cellular environment.
Nat Microbiol
January 2025
Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China.
Hepatocellular carcinoma (HCC) is accompanied by an altered gut microbiota but whether the latter contributes to carcinogenesis is unclear. Here we show that faecal microbiota transplantation (FMT) using stool samples from patients with HCC spontaneously initiate liver inflammation, fibrosis and dysplasia in wild-type mice, and accelerate disease progression in a mouse model of HCC. We find that HCC-FMT results in gut barrier injury and translocation of live bacteria to the liver.
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