Dead Cell Regions

Dead cell regions are areas of tissue in which cells have lost viability, often forming within tumors when abnormal growth outpaces the blood supply; identifying them matters because they reveal severe local stress and can influence disease assessment. As inadequate perfusion limits oxygen and nutrient delivery, hypoxia, acidosis, and metabolic failure damage cells, leading to necrosis and accumulation of cellular debris at the tumor core or other poorly vascularized sites. In cancer research, investigators examine dead cell regions with histology, imaging, and molecular assays to map tumor architecture, evaluate treatment response, and study how the surrounding microenvironment affects invasion, immune activity, and therapeutic resistance.

Dead Cell Regions - Related Videos

Research

JoVE Journal - Biology

Quantification of Proliferative and Dead Cells in Enteroids

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Cited by 2 •

2020

The presented protocol uses flow cytometry to quantify the number of proliferating and dead cells in cultured mouse enteroids. This method is helpful to evaluate the effects of drug treatment on organoid proliferation and survival.

Research

JoVE Journal - Neuroscience
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In vitro Quantitative Imaging Assay for Phagocytosis of Dead Neuroblastoma Cells by iPSC-Macrophages

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Cited by 7 •

2021

Neurodegenerative diseases are associated with dysregulated microglia functions. This article outlines an in vitro assay of phagocytosis of neuroblastoma cells by iPSC-macrophages. Quantitative microscopy readouts are described for both live-cell time-lapse imaging and fixed-cell high-content imaging.

Preparation of Single-cell Suspensions for Cytofluorimetric Analysis from Different Mouse Skin Regions

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Cited by 21 •

2016

The skin is home to a complex immune cell network. We describe an efficient methodology for the digestion of mouse skin, from different parts of the animal's body, in order to obtain a single-cell suspension and analyze the different leukocyte populations resident in the skin by flow cytometry.

Education

JoVE Core - Analytical Chemistry

IR Frequency Region: Fingerprint Region

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2024

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1. The...

The Eukaryotic Promoter Region

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2020

The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...

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