Results 81 to 90 of about 3,632,451 (277)

GABA and glutamate moderate beta-amyloid related functional connectivity in cognitively unimpaired old-aged adults

NeuroImage: Clinical, 2019
Background: Effects of beta-amyloid accumulation on neuronal function precede the clinical manifestation of Alzheimer's disease (AD) by years and affect distinct cognitive brain networks.
F.C. Quevenco, S.J. Schreiner, M.G. Preti, J.M.G. van Bergen, T. Kirchner, M. Wyss, S.C. Steininger, A. Gietl, S.E. Leh, A. Buck, K.P. Pruessmann, C. Hock, R.M. Nitsch, A. Henning, D. Van De Ville, P.G. Unschuld   +15 more
doaj   +1 more source

Accurate and noninvasive prostate cancer detection using plasma‐derived extracellular vesicle RNA

FEBS Open Bio, EarlyView.
Plasma extracellular vesicles were captured with WGA‐conjugated magnetic beads and profiled for RNA biomarkers. A three‐RNA panel (NM_024955, NR_047469, and NR_002564) distinguished prostate cancer from healthy controls and benign prostatic hyperplasia, supporting a simple, noninvasive approach to improve prostate cancer detection.
Hanping Wei, Haoran Wu, Wei Feng
wiley   +1 more source

All‐Amyloid Functional Coacervates

Advanced Materials
ABSTRACT Electrostatic complex coacervates offer a robust pathway to convert homogeneous oppositely charged polyelectrolyte solutions into condensed structured liquids via liquid–liquid phase separation (LLPS). Directing these principles toward artificial, all‐proteinaceous complex coacervates enables the development of soft matter ...
Seyyed Alireza Hashemi, Mohammad Peydayesh, Laura Baraldi, Mohammad Arjmand, Raffaele Mezzenga   +4 more
openaire   +2 more sources

Protocol for quantifying miRNA trafficking across the endosomal membrane

FEBS Open Bio, EarlyView.
An in vitro protocol measures miRNA uptake into endosomes isolated from mammalian cell extracts, which are free of subcellular contaminants. Performed at 37 °C in the presence of ATP, it ensures the import of single‐stranded miRNA into the endosomal lumen.
Syamantak Ghosh, Kamalika Mukherjee, Suvendra N. Bhattacharyya   +2 more
wiley   +1 more source

Functional Amyloids in the Mouse Sperm Acrosome [PDF]

Molecular and Cellular Biology, 2014
The acrosomal matrix (AM) is an insoluble structure within the sperm acrosome that serves as a scaffold controlling the release of AM-associated proteins during the sperm acrosome reaction. The AM also interacts with the zona pellucida (ZP) that surrounds the oocyte, suggesting a remarkable stability that allows its survival despite being surrounded by
Benoit, Guyonnet, Nathan, Egge, Gail A, Cornwall   +2 more
openaire   +2 more sources

The C‐terminal domain of yeast Arginyltransferase1 is essential for its catalytic activity

FEBS Open Bio, EarlyView.
Arginyltransferase 1 (Ate1), a eukaryotic enzyme, catalyses arginylation, transferring arginine from tRNA‐Arg to the amino terminus of the target protein. Overexpression of Ate1 in yeast is lethal and is dependent on arginylation. This study elucidates how mutations in the cofactor‐binding and active site of Ate1 and truncation of its structural ...
Vikas Kumar Yadav, Shweta Shweta, Manisha Malhotra, Vikash Maurya, Akhilesh Kumar   +4 more
wiley   +1 more source

Biology of Amyloid: Structure, Function, and Regulation [PDF]

Structure, 2010
Amyloids are highly ordered cross-β sheet protein aggregates associated with many diseases including Alzheimer's disease, but also with biological functions such as hormone storage. The cross-β sheet entity comprising an indefinitely repeating intermolecular β sheet motif is unique among protein folds.
Greenwald J, Riek R
openaire   +3 more sources

Functional Amyloid Formation within Mammalian Tissue.

PLoS Biology, 2005
Amyloid is a generally insoluble, fibrous cross-beta sheet protein aggregate. The process of amyloidogenesis is associated with a variety of neurodegenerative diseases including Alzheimer, Parkinson, and Huntington disease.
Douglas M Fowler, Atanas V Koulov, Christelle Alory-Jost, Michael S Marks, William E Balch, Jeffery W Kelly   +5 more
doaj   +2 more sources

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

Aging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

Understanding and Mitigating the Risk of Accelerated Biological Aging in Survivors of Cancer: A Scoping Review

Aging and Cancer, EarlyView.
Cancer treatment is associated with measurable acceleration of biological aging across epigenetic, telomere, senescence, and immune biomarkers. However, biomarker validation and interventional strategies remain limited, especially in hematologic malignancies, underscoring the need for standardized multi‐omic aging assessments and adequately powered ...
Moataz Ellithi, Emily Herdman, Danielle Westmark, Vijaya R. Bhatt   +3 more
wiley   +1 more source