Influence of Dendritic Cells on Tumor Growth

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 1985 Jul 1

PMID 3859872

Citations 12

Authors

S C Knight

R Hunt

C Dore

P B Medawar

Affiliations

Soon will be listed here.

Abstract

Dendritic cells (DC) exposed to antigen are potent initiators of immune responses, and the numbers of DC and the dose of antigen control the level of response. The influence of these variables was tested on the growth of mouse sarcoma cells in vivo. When normal syngeneic DC (100,000) were given to mice with palpable tumors, tumor regression or delay in tumor growth was obtained. DC exposed to increasing doses of tumor extract in vitro before administration had progressively less effect. DC exposed to antigen delayed tumor growth significantly only when given on the same day as 500 tumor cells. The studies suggested that low doses of antigen on DC elicit immune responses and that high doses block them. The numbers of antigen-presenting cells and the dose of antigen modulate the degree of immunity to mouse sarcoma in vivo.

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