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Infection with the protozoan parasite\n                    <jats:italic>Toxoplasma gondii<\/jats:italic>\n                    causes chronic infection and inflammation in the brain parenchyma. Control of parasite replication requires the continuous presence of IFN\u03b3-producing T cells to keep\n                    <jats:italic>T. gondii<\/jats:italic>\n                    in its slowly replicating cyst form. During infection, a network of extracellular matrix fibers, revealed using multiphoton microscopy, forms in the brain. The origin and composition of these structures are unknown but the fibers have been observed to act as a substrate for migrating T cells. In this study, we show a critical regulator of extracellular matrix (ECM) remodeling, Secreted Protein, Acidic, Rich in Cysteine (SPARC), is upregulated in the brain during the early phases of infection in the frontal cortex. In the absence of SPARC, a reduced and disordered fibrous network, increased parasite burden, and reduced antigen-specific T cell entry into the brain points to a role for SPARC in T cell recruitment to and migration within the brain. We also report SPARC can directly bind to CCR7 ligands CCL19 and CCL21 but not CXCL10, and enhance migration toward a chemokine gradient. Measurement of T cell behavior points to tissue remodeling being important for access of immune cells to the brain and facilitating cellular locomotion. Together, these data identify SPARC as an important regulatory component of immune cell trafficking and access to the inflamed CNS.\n                  <\/jats:p>","DOI":"10.1038\/s41598-021-83952-0","type":"journal-article","created":{"date-parts":[[2021,2,25]],"date-time":"2021-02-25T06:04:11Z","timestamp":1614233051000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["SPARC coordinates extracellular matrix remodeling and efficient recruitment to and migration of antigen-specific T cells in the brain following infection"],"prefix":"10.1038","volume":"11","author":[{"given":"Kathryn E.","family":"McGovern","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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