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The effects of early postoperative immunization with xenogeneic embryo proteins on Lewis lung carcinoma model.
Experimental Oncology 2018 December
AIM: To investigate the effect of chicken embryo proteins (CEP) as a prototype of xenogeneic vaccine on immune reactions in mice immunized after Lewis lung carcinoma (LLC) surgical removal.
MATERIALS AND METHODS: C57Bl male mice were immunized on days 1, 8, and 15 after surgical removal of LLC. The immune response was assessed on days 7, 14, 21 and 28 after tumor resection. Cytotoxic activity of natural killer cells (NK) and cytotoxic T-lymphocytes as well as antibody dependent cellular cytotoxicity was estimated in MTT-assay; specific antibodies were detected in ELISA; lymphocyte proliferation was tested in reaction of in vitro blast transformation.
RESULTS: None of the immunized mice developed LLC metastases. Immunization with CEP seems to prevent the potential decrease in NK cell cytotoxic activity and spontaneous blast transformation activity of lymphocytes following the surgically induced stress. Further research on improving immunization schedule and elucidating the mechanisms of NK modulation with CEP is needed.
MATERIALS AND METHODS: C57Bl male mice were immunized on days 1, 8, and 15 after surgical removal of LLC. The immune response was assessed on days 7, 14, 21 and 28 after tumor resection. Cytotoxic activity of natural killer cells (NK) and cytotoxic T-lymphocytes as well as antibody dependent cellular cytotoxicity was estimated in MTT-assay; specific antibodies were detected in ELISA; lymphocyte proliferation was tested in reaction of in vitro blast transformation.
RESULTS: None of the immunized mice developed LLC metastases. Immunization with CEP seems to prevent the potential decrease in NK cell cytotoxic activity and spontaneous blast transformation activity of lymphocytes following the surgically induced stress. Further research on improving immunization schedule and elucidating the mechanisms of NK modulation with CEP is needed.
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