Abstract:Total hemolytic complement activity (CH50) was compared in sera from normal and tumor-bearing hamsters. CH50 ranged from 160-216 in normal animals and from 82 to 152 in tumor-bearing animals. Preliminary screening assays indicated that of 9 complement components assayed, only C2 and C4 showed differences in titer in both normal and tumor-bearer sera. In an expanded study, examination of sera from 12 normal and 14 tumor-bearing hamsters showed that the mean C4 and C2 levels were approximately 88 and 70% below t… Show more
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