Unknown

Dataset Information

0

A Protease Activatable Interleukin-2 Fusion Protein Engenders Antitumor Immune Responses by Interferon Gamma-Dependent and Interferon Gamma-Independent Mechanisms.


ABSTRACT: Cytokines are powerful mediators of immune responses and some, such as interleukin-2 (IL-2), have achieved dramatic responses as cancer immunotherapies. Unfortunately, systemic administration often results in deleterious side effects, prompting exploration of strategies to localize cytokine activity to the tumor microenvironment (TME). To this end, we constructed an IL-2/IL2Ra fusion protein (IL-2FP) with an MMP2/9-specific cleavage site, designed to exploit the dysregulated protease activity in the TME to selectively activate IL-2 in the tumor. To determine if TME protease activity is sufficient to cleave the FP and if FP activity is due to specific cleavage, we created Colon 38 tumor cell lines expressing similar levels of IL-2FPs with either a functional cleavage site [H11(cs-1FP)] or a scrambled, noncleavable sequence [H2(scramFP)]. H11(cs-1FP) tumors demonstrated reduced tumor growth, characterized by regressions not observed in H2(scramFP) tumors. Analysis through qRT-PCR, flow cytometry, and immunohistochemistry indicate robust CD8 responses in the H11(cs-1FP) tumors. Interferon gamma (IFNg) knockout mice revealed that the immune effects of the cleavable FP are mediated through both IFNg-dependent and IFNg-independent mechanisms. Collectively, these data suggest that matrix metalloproteinases (MMPs) in the TME can cleave the IL-2FP specifically, thus enhancing an antitumor response, and provide a rationale for further developing this approach.

SUBMITTER: Norville K 

PROVIDER: S-EPMC9347422 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature

altmetric image

Publications

A Protease Activatable Interleukin-2 Fusion Protein Engenders Antitumor Immune Responses by Interferon Gamma-Dependent and Interferon Gamma-Independent Mechanisms.

Norville Karli K   Skrombolas Denise D   Ferry Shannon L SL   Kearns Nolan N   Frelinger John G JG  

Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research 20220701 7


Cytokines are powerful mediators of immune responses and some, such as interleukin-2 (IL-2), have achieved dramatic responses as cancer immunotherapies. Unfortunately, systemic administration often results in deleterious side effects, prompting exploration of strategies to localize cytokine activity to the tumor microenvironment (TME). To this end, we constructed an IL-2/IL2Ra fusion protein (IL-2FP) with an MMP2/9-specific cleavage site, designed to exploit the dysregulated protease activity in  ...[more]

Similar Datasets

| S-EPMC6994338 | biostudies-literature
| S-EPMC9464860 | biostudies-literature
| S-EPMC4650652 | biostudies-literature
| S-EPMC4046807 | biostudies-literature
2021-10-13 | GSE147195 | GEO
2021-10-13 | GSE172060 | GEO
| S-EPMC6105580 | biostudies-literature
| S-EPMC5606984 | biostudies-literature
| S-EPMC7333426 | biostudies-literature
| S-EPMC3024777 | biostudies-literature