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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 100, No. s1, 2005, pp. 127-130
Bioline Code: oc05039
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 100, No. s1, 2005, pp. 127-130

 en Thymus involution in alloxan diabetes: analysis of mast cells
EO Barreto; I Riederer; ACS Arantes; VF Carvalho; FA Farias-Filho; RSB Cordeiro; MA Martins; W Savino & PMR e Silva


We previously reported that alloxan-induced diabetes results in reduction in the number and reactivity of mast cells at different body sites. In this study, the influence of diabetes on thymic mast cells was investigated. Thymuses from diabetic rats showed marked alterations including shrinkage, thymocyte depletion, and increase in the extracellular matrix network, as compared to those profiles seen in normal animals. Nevertheless, we noted that the number and reactivity of mast cells remained unchanged. These findings indicate that although diabetes leads to critical alterations in the thymus, the local mast cell population is refractory to its effect. This suggests that thymic mast cells are under a different regulation as compared to those located in other tissues.

diabetes - mast cells - thymus - extracellular matrix

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