We developed a hollow fiber centrifugal ultrafiltration (HFCF-UF) method to study the change of plasma levels of free glycine (Gly) in patients with acute ischemic stroke (AIS). Twenty-four patients with AIS confirmed by diffusion-weighted imaging (DWI) were enrolled. During the study period, the patients did not receive any supplemental amino acids therapy that could affect the obtained results. Our results showed that although AIS patients adopted different methods of treatment (thrombolytic and non-thrombolytic), the clinical NIHSS score of AIS showed a downward trend whereas Gly concentration showed increased trend. Moreover, plasma free Gly concentration was positively correlated with ASPECTS score. The correlation between Gly levels and infarct volume showed a statistical significance. That is to say, higher Gly level predicted smaller infarct size. Thus, the change of free Gly level in plasma could be considered as a potential biomarker of AIS.
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http://dx.doi.org/10.1007/s00726-023-03236-x | DOI Listing |
J Therm Biol
December 2024
Department of Animal and Fish Production, Faculty of Agriculture, Alexandria University, Alexandria, 21545, Egypt.
Global warming is seriously threatening sheep farmings by increasing health problems and decreasing reproductive efficiency. In this study, pomegranate peels ethanolic extract (Ppee), rich in phenolic acids, was prepared in free (Fppee) and nanoemulsified (Nppee, with 18.49 nm-21.
View Article and Find Full Text PDFPhys Rev Lett
December 2024
Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
We measure the high-intensity laser propagation throughout meter-scale, channel-guided laser-plasma accelerators by adjusting the length of the plasma channel on a shot-by-shot basis, showing high-quality guiding of 500 TW laser pulses over 30 cm in a hydrogen plasma of density n_{0}≈1×10^{17} cm^{-3}. We observed transverse energy transport of higher-order modes in the first ≈12 cm of the plasma channel, followed by quasimatched propagation, and the gradual, dark-current-free depletion of laser energy to the wake. We quantify the laser-to-wake transfer efficiency limitations of currently available petawatt-class lasers and demonstrate via simulation how control over the laser mode can significantly improve beam parameters.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, USA.
Background: Multiple AD risk genes are implicated in lipid metabolism, and plasma and brain lipid levels are altered in AD. Astrocytes are enriched in key lipid-related factors and are likely contributors to altered lipid homeostasis in AD. We hypothesize that APP/Aβ-related pathology and neuroimmune factors modulate astrocytic gene transcription that promote maladaptive changes in lipid pathways, including aberrant astrocytic production and release of lipids that could affect Aβ pathology and neuronal deficits.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Washington University School of Medicine, St. Louis, MO, USA.
Background: P-tau217 has emerged as a compelling alternative to long-established p-tau181 to accurately measure tau modifications in biofluids in response to brain Abeta and tau deposition in Alzheimer's disease (AD). Understanding the specificity and significance of p-tau217 changes over AD stages is critical to interpret its potential response to treatments against Abeta and tau aggregation.
Methods: We measured p-tau217 phosphorylation by mass spectrometry.
Alzheimers Dement
December 2024
ADEL Institute of Science & Technology (AIST), ADEL, Inc., Seoul, Korea, Republic of (South).
Background: Beta-2 microglobulin (β2m) is a component of the major histocompatibility complex class I (MHC-I) playing a crucial role in the immune system on cell surface, but it can be separated from the MHC-I and exist in biological fluid independently. Numerous reports have shown that β2m is a systemic pro-aging factor impairing cognitive function, and that it is increased in the blood and CSF of patients with Alzheimer's disease (AD). While β2m in the body fluid has been recognized as a potential factor in AD and aging, the development of therapeutic agents, especially those directly targeting β2m using antibodies, may face challenges.
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