The microtubule-associated protein (MAP) tau is found primarily in neurons and errors in its regulation are associated with Alzheimer's disease and other neurodegenerative disorders. Tau expression is transcriptionally regulated and tissue-specific. In this study, starting with a approximately 7500-bp fragment from the mouse tau gene, which includes tau exon -1, we define regions preferentially conferring tissue-specific expression. Furthermore, gel shift assays indicate that transcriptional regulators SP-1 and AP-2 are important for basal expression but not necessary for neuron-specific expression of the tau transcript.
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http://dx.doi.org/10.1016/j.bbaexp.2004.10.008 | DOI Listing |
J Biol Phys
January 2025
Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing, 100190, China.
Conventional kinesin protein is a prototypical biological molecular motor that can step processively on microtubules towards the plus end by hydrolyzing ATP molecules, performing the biological function of intracellular transports. An important characteristic of the kinesin is the load dependence of its velocity, which is usually measured by using the single molecule optical trapping method with a large-sized bead attached to the motor stalk. Puzzlingly, even for the same kinesin, some experiments showed that the velocity is nearly independent of the forward load whereas others showed that the velocity decreases evidently with the increase in the magnitude of the forward load.
View Article and Find Full Text PDFThe folded auto-inhibited state of kinesin-1 is stabilized by multiple weak interactions and binds weakly to microtubules. Here we investigate the extent to which homodimeric kinesin-1 lacking light chains is activated by the dynein activating adaptor BicD. We show that one or two kinesins can bind to the central region of BicD (CC2), a region distinct from that which binds dynein-dynactin (CC1) and cargo-adaptor proteins (CC3).
View Article and Find Full Text PDFCell Death Dis
January 2025
CECAD Cluster of Excellence, University of Cologne, Cologne, Germany.
Constitutive mitochondrial dynamics ensure quality control and metabolic fitness of cells, and their dysregulation has been implicated in various human diseases. The large GTPase Dynamin-related protein 1 (Drp1) is intimately involved in mediating constitutive mitochondrial fission and has been implicated in mitochondrial cell death pathways. During ferroptosis, a recently identified type of regulated necrosis driven by excessive lipid peroxidation, mitochondrial fragmentation has been observed.
View Article and Find Full Text PDFMethods Cell Biol
January 2025
Department of Pharmacology, SPP School of Pharmacy & Technology Management, Mumbai, India. Electronic address:
The foremost cause of dementia is Alzheimer's disease (AD). The vital pathological hallmarks of AD are amyloid beta (Aβ) peptide and hyperphosphorylated tau (p-tau) protein. The current animal models used in AD research do not precisely replicate disease pathophysiology, making it difficult for researchers to quickly and effectively gather data or screen potential therapy possibilities.
View Article and Find Full Text PDFJ Prev Alzheimers Dis
February 2025
Neurology, Fondazione IRCCS "San Gerardo dei Tintori", Monza, Italy; Milan Center for Neuroscience (NeuroMI), University of Milano-Bicocca, Monza, Italy; Laboratory of Neurobiology, School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy. Electronic address:
Background: The new criteria for Alzheimer's disease pave the way for the introduction of core blood biomarkers of Alzheimer's disease (BBAD) into clinical practice. However, this depends on the demonstration of sufficient accuracy and robustness of BBADs in the intended population.
Objectives: To assess the diagnostic performance of core BBADs in our memory clinic, comparing them with cerebrospinal fluid (CSF) analysis.
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