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The Journal of Thoracic and Cardiovascular Surgery, Vol 93, 109-114, Copyright © 1987 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
P Ryhanen, J Ilonen, HM Surcel, T Nurmi, K Poikonen, K Jarvenpaa and A Salmi
We studied in vivo lymphocyte activation in patients who underwent cardiac
operation. A large number of deoxyribonucleic acid-synthesizing cells
characterized by 3H-thymidine uptake and morphologically atypical
lymphocytes were found after operation in the peripheral blood samples of
patients, the peak level occurring on the sixth or seventh postoperative
day. Most of the deoxyribonucleic acid-synthesizing cells were in the B
cell fraction. The number of antibody secreting cells in the patients'
peripheral blood samples was found increased from the normal level after
operation. Immunoglobulin A-secreting cells were the most elevated
fraction. The percentage of helper (OKT4) and suppressor (OKT8) cells in
the postoperative samples was not significantly different from that in the
preoperative samples. Only a few were Ia antigen positive cells. Co-culture
of patients' B cells with their own T cells and with the T cells taken from
two healthy controls revealed no signs of any helper or suppressor effect
on these antibody-secreting cells. The results show that after cardiac
operation the peripheral blood of patients contains an increased number of
immunoglobulin secreting cells. The regulatory T-lymphocytes seem not to
have any effect in vitro on these in vivo activated cells.
ARTICLES
Characterization of in vivo activated lymphocytes found in the peripheral blood of patients undergoing cardiac operation
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