Tattoo ink induces inflammation in the draining lymph node and impairs the immune response against a COVID-19 vaccine
Capucetti, A.; Falivene, J.; Pizzichetti, C.; Latino, I.; Mazzuchelli, L.; Schacht, V.; Hauri, U.; Raimondi, A.; Virgilio, T.; Pulfer, A.; Mosole, S.; Grau Roma, L.; Baumler, W.; Palus, M.; Renner, L.; Ruzek, D.; Goldman Levy, G.; Foerster, M.; Chahine, K.; Gonzalez, S. F.
Show abstract
Despite safety concerns regarding the toxicity of tattoo ink, no studies have reported the consequences of tattooing on the immune response. In this work, we have characterized the transport and accumulation of different tattoo inks in the lymphatic system using a murine model. Upon quick lymphatic drainage, we observed that macrophages mainly capture the ink in the lymph node (LN). An initial inflammatory reaction at local and systemic levels follows ink capture. Notably, the inflammatory process is maintained over time as we observed clear signs of inflammation in the draining LN two months following tattooing. In addition, the capture of ink by macrophages was associated with the induction of apoptosis in both human and murine models. Furthermore, the ink accumulated in the LN altered the immune response against a COVID-19 vaccine. We observed a reduced antibody response following vaccination with a mRNA-based SARS-CoV-2 vaccine, which was associated with a decreased expression of the Spike protein in macrophages in the draining LN. Considering the unstoppable trend of tattooing in the population, our results are crucial in informing the toxicology programs, policymakers, and the general public regarding the potential risk of the tattooing practice associated with an altered immune response.
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