To objectivize possible immunomodulatory effects of polybacterial lysate Olimunostim (P. acnes, K. pneumoniae, S. aureus), splenic lymphocyte proliferation and T-lymphocyte subsets were followed-up in Balb/c mice administered perorally the lysate or saline (controls). The enhanced spontaneous lymphocyte proliferation observed at the beginning of Olimunostim application preceded a gradual increase of lymphocyte reactivity to T-mitogens reaching the maximum five days after the administration of the last dose and returning back to the control levels ten days afterwards. This stimulation of lymphocyte proliferation was accompanied by Olimunostim induced increase of CD4+ splenic lymphocytes being most pronounced five days after the end of immunomodulation and later returning to the initial values. The last experiment revealed an enhanced response of the in vivo primed lymphocytes after the re-exposure to Olimunostim in vitro. It is concluded that mostly nonspecific activation mechanisms, plausibly also parallelly induced specific immunity, are involved in Olimunostim modulatory effects on the cellular immune response.

Institute of Immunology Medical Faculty Palacký University Olomouc Czechoslovakia

The polybacterial lysate Olimunostim modulates lymphocyte function in vitro and restores depressed cellular immunity in vivo