Cellular distribution of prothymosin alpha and parathymosin in rat thymus and spleen.
J Histochem Cytochem
; 38(12): 1889-94, 1990 Dec.
Article
em En
| MEDLINE
| ID: mdl-2254650
ABSTRACT
By means of immunohistochemical methods, we have investigated the cellular distribution of prothymosin alpha and parathymosin in rat thymus and spleen, using specific antibodies raised against thymosin alpha-1 and against parathymosin. We observed prothymosin alpha immunoreactivity in lymphoid cells both in thymus and spleen. In the thymus, prothymosin alpha staining was more marked in cortex than in medulla. In the spleen, prothymosin alpha was found in lymphocytes of the periarteriolar lymphatic sheaths and was especially prominent in the germinal centers. Parathymosin immunoreactivity in the thymus was mainly localized in the medulla; positive cells were reticuloepithelial cells from the thymic reticulum and the blood barrier. Thymocytes were negative. In spleen, parathymosin was found in reticular cells arranged in a ring between the periarteriolar lymphatic sheath and the marginal zone. Our results do not support an exclusive role for these peptides as immune system hormones or cytokines.
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Base de dados:
MEDLINE
Assunto principal:
Precursores de Proteínas
/
Baço
/
Timosina
/
Timo
Idioma:
En
Ano de publicação:
1990
Tipo de documento:
Article
País de afiliação:
Espanha