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Histochemistry. 1989;91(6):479-82.

Carbonic anhydrase activity in peripheral T-lymphocytes and appearance of the activity during their maturation in the thymus. A histochemical demonstration.

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Department of Anatomy, University of Oulu, Finland.


Carbonic anhydrase (CA) activity is demonstrated in lymphoid tissue for the first time using the histochemical (Hansson's) method. A CA-positive reaction was seen in lymphocytes present in T-lymphocyte areas in both the lymph node and the spleen. The most intense staining was seen in the small T-lymphocytes, whereas the medium-sized T-lymphocytes were less markedly stained. The cortical lymphocytes in the thymus were completely devoid of staining, but the small medullary T-lymphocytes stained intensely. The results suggest that peripheral and thymic medullary T-lymphocytes contain CA activity, which appears in these cells during their maturation in the thymus.

[Indexed for MEDLINE]

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