Histologic sectioning produces TUNEL reactivity. A potential cause of false-positive staining.
Arch Pathol Lab Med
; 123(6): 529-32, 1999 Jun.
Article
em En
| MEDLINE
| ID: mdl-10383807
ABSTRACT
OBJECTIVE:
To determine if the DNA strand breaks caused by tissue sectioning result in terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labeling (TUNEL) reactivity.METHODS:
The incidence and location of TUNEL-positive nuclei were determined in 5- and 15-micron sections of human stomach. Five- and 15-micron sections of tonsil were stained as a positive control.RESULTS:
In 5-micron gastric sections, 69% of nuclei were labeled; in 15-micron sections, only 30% were labeled. In the latter sections, almost all labeled nuclei were located at the cut surface of sections. Labeled nuclei did not have apoptotic morphology. Apototic bodies and tingible body macrophages were labeled throughout 15-micron sections of tonsil.CONCLUSIONS:
Tissue sectioning creates TUNEL reactivity. The morphologic findings on routine stains should be considered the gold standard for the detection of apoptosis on tissue sections.
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Base de dados:
MEDLINE
Assunto principal:
Estômago
/
Tonsila Palatina
/
DNA
/
Núcleo Celular
/
Artefatos
/
Marcação In Situ das Extremidades Cortadas
/
Microtomia
Limite:
Humans
Idioma:
En
Revista:
Arch Pathol Lab Med
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Estados Unidos