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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Spontaneous release of interleukin-2 by lung T lymphocytes in active pulmonary sarcoidosis.

We investigated the possible role of interleukin-2, a T-cell product that stimulates the clonal increase of responsive T lymphocytes, in the pathogenesis of pulmonary sarcoidosis. We obtained mononuclear effector cells from the lungs of 10 patients with sarcoidosis and high-intensity alveolitis, 17 patients with sarcoidosis and low-intensity alveolitis, 3 patients with idiopathic pulmonary fibrosis, and 10 normal controls. Lung cells from the group with sarcoidosis and low-intensity alveolitis, from the group with idiopathic pulmonary fibrosis, and from the controls produced insignificant amounts of interleukin-2. However, lung cells from 9 of 10 patients with sarcoidosis and high-intensity alveolitis spontaneously released interleukin-2, and in a proportion that correlated with the proportion of T cells in the lung washings (P less than 0.01). Blood T cells from the same patients did not release interleukin-2. To determine whether release of interleukin-2 by the lung T cells had a biologic effect in vivo, we measured T-lymphocyte replication in the lungs of patients and controls. The lung T lymphocytes replicated at a rate that was several times higher in the patients with sarcoidosis and high-intensity alveolitis than in the other patient groups or the controls (P less than 0.01). These observations suggest that the release of interleukin-2 by lung T cells has a central role in increasing the numbers of lung T cells in active pulmonary sarcoidosis.[1]

References

  1. Spontaneous release of interleukin-2 by lung T lymphocytes in active pulmonary sarcoidosis. Pinkston, P., Bitterman, P.B., Crystal, R.G. N. Engl. J. Med. (1983) [Pubmed]
 
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