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The interaction of tPA with NMDAR1 drives neuroinflammation and neurodegeneration in α-synuclein-mediated neurotoxicity.
J Neuroinflammation
January 2025
Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, USA.
The thrombolytic protease tissue plasminogen activator (tPA) is expressed in the CNS, where it regulates diverse functions including neuronal plasticity, neuroinflammation, and blood-brain-barrier integrity. However, its role in different brain regions such as the substantia nigra (SN) is largely unexplored. In this study, we characterize tPA expression, activity, and localization in the SN using a combination of retrograde tracing and β-galactosidase tPA reporter mice.
View Article and Find Full Text PDFPhosphorylation of Bok at Ser-8 blocks its ability to suppress IPR-mediated calcium mobilization.
Cell Commun Signal
January 2025
Department of Pharmacology, SUNY Upstate Medical University, Syracuse, NY, 13210, USA.
Background: Bok is a poorly characterized Bcl-2 protein family member with roles yet to be clearly defined. It is clear, however, that Bok binds strongly to inositol 1,4,5-trisphosphate (IP) receptors (IPRs), which govern the mobilization of Ca from the endoplasmic reticulum, a signaling pathway required for many cellular processes. Also known is that Bok has a highly conserved phosphorylation site for cAMP-dependent protein kinase at serine-8 (Ser-8).
View Article and Find Full Text PDFIonised calcium levels during trauma resuscitation in predicting outcomes-a prospective cohort study.
Eur J Trauma Emerg Surg
January 2025
Department of Biostatics, All India Institute of Medical Sciences, New Delhi, India.
Background: Haemorrhage remains the leading cause of preventable mortality following trauma, often aggravated by the acidosis, hypothermia and coagulopathy-the lethal triad of trauma. However, the impact of trauma-induced hypocalcemia on the haemorrhage remains unclear. It is intuitive to consider perturbations of ionised calcium early during trauma resuscitation in acutely injured patients given its pathophysiological significance for an improved outcome.
View Article and Find Full Text PDFCPK1 activates CNGCs through phosphorylation for Ca signaling to promote root hair growth in Arabidopsis.
Nat Commun
January 2025
State Key Laboratory of Plant Trait Design, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences (CAS), Shanghai, 200032, China.
Cyclic nucleotide-gated channel 5 (CNGC5), CNGC6, and CNGC9 (CNGC5/6/9 for simplicity) control Arabidopsis root hair (RH) growth by mediating the influx of external Ca to establish and maintain a sharp cytosolic Ca gradient at RH tips. However, the underlying mechanisms for the regulation of CNGCs remain unknown. We report here that calcium dependent protein kinase 1 (CPK1) directly activates CNGC5/6/9 to promote Arabidopsis RH growth.
View Article and Find Full Text PDFPKCα regulates the secretion of PDL1-carrying small extracellular vesicles in a p53-dependent manner.
Cell Death Dis
January 2025
School of Pharmacy, Faculty of Medicine & State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau, China.
Small extracellular vesicles (sEVs), carrying PD-L1, have been implicated in immune evasion and tumor progression. However, understanding how PD-L1 sEVs are secreted still needs to be improved. We found that the secretion dynamics of PD-L1 sEVs is similar to that of other sEVs.
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