Lymphocyte Stimulation and Plasma Inhibition in Patients with Malignant Neoplasms

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Abstract
The blastogenic response of lymphocytes from patients with malignant neoplasms was evaluated by stimulation with three phytomitogens (PHA, PWM, and Con A). The response of patient lymphocytes to all three mitogens was significantly lower than that of control lymphocytes, and most patients with abnormal PHA responses also responded abnormally to PWM and Con A. However, a few patients with normal PHA responses were abnormal to Con A, suggesting the suppression of a Con A-sensitive population. The observation that PWM responses were abnormal in patients with lowered PHA lymphocyte stimulation indicates that both T and B lymphocyte mitogen responses were suppressed in these patients. Plasma from patients was capable of either inhibiting or enhancing lymphocyte mitogen stimulation. However, inhibitory plasmas were generally from patients with abnormal mitogen responses.

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