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A 2D cell segmentation protocol for monitoring multiple STAT signaling pathways by fluorescence microscopy.
STAR Protoc
January 2025
Gill Institute for Neuroscience, Program in Neuroscience, Department of Psychological and Brain Sciences Indiana University, Bloomington, IN 47405, USA. Electronic address:
Microscopic cell segmentation typically requires complex imaging, staining, and computational steps to achieve acceptable consistency. Here, we describe a protocol for the high-fidelity segmentation of the nucleus and cytoplasm in cell culture and apply it to monitor interferon-induced signal transducer and activator of transcription (STAT) signaling. We provide guidelines for sample preparation, image acquisition, and segmentation.
View Article and Find Full Text PDFTelomerase in cancer- ongoing quest and future discoveries.
Mol Biol Rep
January 2025
Department of Integrative Biology, School of Bio-Sciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India.
Telomerase, constituted by the dynamic duo of telomerase reverse transcriptase (TERT), the catalytic entity, and an integral RNA component (TERC), is predominantly suppressed in differentiated human cells due to postnatal transcriptional repression of the TERT gene. Dysregulation of telomerase significantly contributes to cancer development via telomere-dependent and independent mechanisms. Telomerase activity is often elevated in advanced cancers, with TERT reactivation and upregulation of TERC observed in early tumorigenesis.
View Article and Find Full Text PDFBortezomib suppresses TGF-β1-mediated LOXL4 reduction through the inhibition of MEK/ERK pathways in MDA-MB-231 cells.
J Recept Signal Transduct Res
January 2025
Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Lysyl oxidase (LOX), a copper-containing secretory oxidase, plays a key role in the regulation of extracellular stiffness through cross-linking with collagen and elastin. Among the LOX family of enzymes, LOX-like 4 (LOXL4) exhibits pro-tumor and anti-tumor properties; therefore, the functional role of LOXL4 in tumor progression is still under investigation. Here, we first determined that transforming growth factor-β1 (TGF-β1) significantly decreased LOXL4 expression in human breast cancer MDA-MB-231 cells, which suggested that decreased LOXL4 may participate in tumor progression.
View Article and Find Full Text PDFCellular Cholesterol Loss Impairs Synaptic Vesicle Mobility via the CAMK2/Synapsin-1 Signaling Pathway.
Front Biosci (Landmark Ed)
January 2025
Department of Neurology, Jinshan Hospital, Fudan University, 201508 Shanghai, China.
Background: Neuronal cholesterol deficiency may contribute to the synaptopathy observed in Alzheimer's disease (AD). However, the underlying mechanisms remain poorly understood. Intact synaptic vesicle (SV) mobility is crucial for normal synaptic function, whereas disrupted SV mobility can trigger the synaptopathy associated with AD.
View Article and Find Full Text PDFA novel strategy for the protective effect of ginsenoside Rg1 against ovarian reserve decline by the PINK1 pathway.
Pharm Biol
December 2025
The Affiliated Hospital, Changchun University of Chinese Medicine, Changchun, China.
Context: The decline in ovarian reserve is a major concern in female reproductive health, often associated with oxidative stress and mitochondrial dysfunction. Although ginsenoside Rg1 is known to modulate mitophagy, its effectiveness in mitigating ovarian reserve decline remains unclear.
Objective: To investigate the role of ginsenoside Rg1 in promoting mitophagy to preserve ovarian reserve.
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