Abstract
Background: For a long time, phenomenon of defective immune-surveillance in cancer patients from pathological standpoint was not elucidated. I have reported 1985 that lowering seral cyclic AMP is biochemical reason of defective immunesurveillance from adoptive lymphocyte immunotherapy experiment among cancer patients. Recently, Honjo Tasku et al., reported why T cell don’t attack cancer cells by the covering of PD-L1 on its receptor of PD-1. This is also one of defective immune-surveillance from cellular side. I have recently surveyed the correlation between seral cyclic AMP concentration and immune activity in cancer patients. I have confirmed the biochemical reason of lowering cyclic AMP leads to seral defective immune-surveillance in cancer patient’s serum. Methods: I have surveyed seral cyclic AMP concentration and T cell number and NK cell among 40 cancer patients and preclinical cancer patients. Results: The averaged seral cyclic AMP has a positive tendency between lower immune activity and lower cyclic AMP in the serum when cancer is developing beforehand. Conclusion: As cyclic AMP is elevated after fasting therapy, adoptive lymphocyte immunotherapy become useful as immuno-potentiation even if in advanced cancer patients.
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