DNT
Also written as: DNT — DNA Nicking and Tailing
DNA nicking and tailing assay used to detect apoptotic cell death in neuroinflammatory conditions.
Full Definition
The DNA nicking and tailing (DNT) assay is a laboratory technique used to identify cells undergoing apoptotic death by detecting DNA fragmentation characteristic of programmed cell death. In neuroimmunology research, DNT assays help assess neuronal and oligodendrocyte death in tissue samples from patients with inflammatory CNS diseases. The technique involves enzymatic labeling of DNA breaks with modified nucleotides that can be visualized through immunohistochemistry or flow cytometry. DNT analysis is particularly valuable for understanding the extent of tissue damage in conditions like multiple sclerosis, where both inflammatory and neurodegenerative processes contribute to cell death.
Usage
Usage note: Often used interchangeably with TUNEL; specify methodology when relevant.
In Context
- "DNT staining revealed extensive oligodendrocyte apoptosis in acute MS lesions." — Neuropathology report
- "The degree of DNT positivity correlated with lesion age and inflammatory activity." — Research methodology