TUNEL assay

TUNEL assay

Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) is a method for detecting DNA fragmentation by labeling the terminal end of nucleic acids.

Method

TUNEL is a common method for detecting DNA fragmentation that results from apoptotic signaling cascades. The assay relies on the presence of nicks in the DNA which can be identified by terminal deoxynucleotidyl transferase, an enzyme that will catalyze the addition of dUTPs that are secondarily labeled with a marker. It may also label cells that have suffered severe DNA damage.

History

Originally described in the paper by Garvrieli, Sherman, and Ben-Sasson, Gavrieli Y, Sherman Y, Ben-Sasson SA. J Cell Biol. 1992 Nov;119(3):493-501.] TUNEL has become one of the main methods for detecting apoptotic programmed cell death. However, for years there has been a debate about its accuracy, due to problems in the original assay which caused necrotic cells to be inappropriately labeled as apoptoticGrasl-Kraupp B, Ruttkay-Nedecky B, Koudelka H, Bukowska K, Bursch W, Schulte-Hermann R. Hepatology. 1995 May;21(5):1465-8.] . The method has subsequently been improved dramatically and if performed correctly should only identify cells in the last phase of apoptosisNegoescu A, Lorimier P, Labat-Moleur F, Drouet C, Robert C, Guillermet C, Brambilla C, Brambilla E. J Histochem Cytochem. 1996 Sep;44(9):959-68.] Negoescu A, Guillermet C, Lorimier P, Brambilla E, Labat-Moleur F. Biomed Pharmacother. 1998;52(6):252-8.] .

References

External links

*


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Tunel — could refer to:# Tünel, a sum in Mongolia # Tünel, a subway system in Istanbul # The TUNEL assay (Terminal deoxynucleotidyl transferase mediated dUTP Nick End Labeling assay), a fluorescence method for measuring cell death (cells undergoing… …   Wikipedia

  • TUNEL-Färbung — Die TUNEL Methode (TdT mediated dUTP biotin nick end labeling) dient der Darstellung von Zellkernen apoptotischer Zellen. „TdT“ steht für „terminal deoxynucleotidyl transferase“, ein Enzym, das in einem Zwischenschritt der Technik verwendet wird …   Deutsch Wikipedia

  • TUNEL-Methode — Die TUNEL Methode (TdT mediated dUTP biotin nick end labeling) dient der Darstellung von Zellkernen apoptotischer Zellen. „TdT“ steht für „terminal desoxynucleotidyl transferase“, ein Enzym, das in einem Zwischenschritt der Technik verwendet wird …   Deutsch Wikipedia

  • TUNEL-Technik — Die TUNEL Methode (TdT mediated dUTP biotin nick end labeling) dient der Darstellung von Zellkernen apoptotischer Zellen. „TdT“ steht für „terminal deoxynucleotidyl transferase“, ein Enzym, das in einem Zwischenschritt der Technik verwendet wird …   Deutsch Wikipedia

  • Ethidium homodimer assay — An ethidium homodimer assay can be used to detect dead or dying cells. Ethidium homodimer is a membrane impermiable fluorescent dye which binds to DNA DNA. After a cell sample has been stained with ethidium homodimer, the dead cells may be viewed …   Wikipedia

  • DNA fragmentation — is the separation or breaking of DNA strands into pieces. It can be intentional by laboratory personnel or the cells, or it can be spontaneous. Intentional Restriction digest is the intentional laboratory breaking of DNA strands. Apoptosis DNA… …   Wikipedia

  • Terminal deoxynucleotidyl transferase — Deoxynucleotidyltransferase, terminal Amino acids 19 125 of human DNA nucleotidylexotransferase. PDB rendering based on 2coe …   Wikipedia

  • Monocrotophos — IUPAC name Dimethyl (E) 1 methyl 2 (methylcarbamoyl)vinyl phosphate …   Wikipedia

  • DNA laddering — (left) visualised in an agarose gel by ethidium bromide staining. A 1 kb marker (middle) and control DNA (right) are included. DNA laddering is a phenomenon seen in laboratory tests; it is a sensitive indicator of programmed cell death …   Wikipedia

  • Test de dispersión de la cromatina espermática — Este artículo o sección necesita ser wikificado con un formato acorde a las convenciones de estilo. Por favor, edítalo para que las cumpla. Mientras tanto, no elimines este aviso puesto el 16 de julio de 2011. También puedes ayudar wikific …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”