Multivalent 4-1BB binding aptamers costimulate CD8+ T cells and inhibit tumor growth in mice.
4-1BB is a major costimulatory receptor that promotes the survival and expansion of activated T cells. Administration of agonistic anti-4-1BB Abs has been previously shown to enhance tumor immunity in mice. Abs are cell-based products posing significant cost, manufacturing, and regulatory challenges. Aptamers are oligonucleotide-based ligands that exhibit specificity and avidity comparable to, or exceeding, that of Abs. To date, various aptamers have been shown to inhibit the function of their cognate target. Here, we have described the development of an aptamer that binds 4-1BB expressed on the surface of activated mouse T cells and shown that multivalent configurations of the aptamer costimulated T cell activation in vitro and mediated tumor rejection in mice. Because aptamers can be chemically synthesized, manufacturing and the regulatory approval process should be substantially simpler and less costly than for Abs. Agonistic aptamers could therefore represent a superior alternative to Abs for the therapeutic manipulation of the immune system.
Duke Scholars
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- Tumor Necrosis Factor Receptor Superfamily, Member 9
- Neoplasm Transplantation
- Mice, Inbred DBA
- Mice, Inbred BALB C
- Mice
- Mastocytoma
- Lymphocyte Activation
- Immunology
- Humans
- Female
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Tumor Necrosis Factor Receptor Superfamily, Member 9
- Neoplasm Transplantation
- Mice, Inbred DBA
- Mice, Inbred BALB C
- Mice
- Mastocytoma
- Lymphocyte Activation
- Immunology
- Humans
- Female