What question did this study set out to answer?

Investigate how heat shock protein-bearing exosomes secreted by drug-stressed human hepatocellular carcinoma cells regulate natural killer cell antitumor immune responses.

March 6, 2012Journal of Biological ChemistryOpen Access

Anticancer Drugs Cause Release of Exosomes with Heat Shock Proteins from Human Hepatocellular Carcinoma Cells That Elicit Effective Natural Killer Cell Antitumor Responses in Vitro

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Authors

LLLihong LvHangzhou Medical College YWYun-Le WanSun Yat-sen University YLYan LinFujian Medical University

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Implication

In vitro study reveals drug-induced exosomes trigger cytotoxic natural killer cell responses in human hepatocellular carcinoma, suggesting novel targets for tumor vaccines.

Key Points

Investigate how heat shock protein-bearing exosomes secreted by drug-stressed human hepatocellular carcinoma cells regulate natural killer cell antitumor immune responses.
Treated human hepatocellular carcinoma cell lines with sensitive or resistant anticancer drugs to induce cellular stress.
Quantified intracellular and surface heat shock proteins (HSP60, HSP70, HSP90) by ELISA and characterized released microvesicles as exosomes.
Evaluated natural killer cell cytotoxicity, granzyme B production, and activating and inhibitory surface receptor profiles following exosome exposure.
Anticancer drugs up-regulated HSP60, HSP70, and HSP90 expression in a stress-specific manner and promoted the active release of HSP-bearing exosomes.
HSP-presenting exosomes enhanced natural killer cell cytotoxicity and granzyme B production, up-regulated inhibitory receptor CD94, and down-regulated activating receptors CD69, NKG2D, and NKp44.
Resistant anticancer drugs stimulated greater exosome release and carried higher levels of HSPs than sensitive drugs, generating superior natural killer cell cytotoxic responses.

Cite This Study

Lv et al. (2012) studied this question.

synapsesocial.com/papers/6a8d191ede501e4dcdd4fd09 https://doi.org/10.1074/jbc.m112.340588

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Implication

In vitro study reveals drug-induced exosomes trigger cytotoxic natural killer cell responses in human hepatocellular carcinoma, suggesting novel targets for tumor vaccines.

Anticancer Drugs Cause Release of Exosomes with Heat Shock Proteins from Human Hepatocellular Carcinoma Cells That Elicit Effective Natural Killer Cell Antitumor Responses in Vitro

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Implication

Key Points

Cite This Study

Anticancer Drugs Cause Release of Exosomes with Heat Shock Proteins from Human Hepatocellular Carcinoma Cells That Elicit Effective Natural Killer Cell Antitumor Responses in Vitro

Discussion

Member takes

Implication

Key Points

Cite This Study

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