{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T07:03:28Z","timestamp":1784617408321,"version":"3.55.0"},"reference-count":60,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T00:00:00Z","timestamp":1784592000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Immunol."],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Intratumoral microbiota, an important component of the tumor microenvironment (TME), have attracted increasing attention in cancer immunotherapy. Emerging evidence links intratumoral microbiota to tumor immune microenvironment (TIME) remodeling, immune cell infiltration, and heterogeneous responses to immune checkpoint inhibitors (ICIs). However, the overall research landscape, knowledge base, and hotspot evolution in this field remain insufficiently characterized. This study aimed to systematically map this field through bibliometric and visualization analyses.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Publications up to November 8, 2025, were retrieved from the Web of Science Core Collection, Scopus, and PubMed. After screening, deduplication, and data standardization, bibliometric analyses were performed using R, VOSviewer, CiteSpace, and Scimago Graphica to examine publication trends, collaboration networks, knowledge bases, and keyword evolution.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      A total of 245 publications were included, comprising 141 original articles and 104 reviews. Since the first publication appeared in 2017, the field has grown exponentially, with a compound annual growth rate (CAGR) of 63.1% from 2017 to 2024. China ranked first in publication output, followed by the United States, while the United States occupied a more central position in total citations and international collaboration.\n                      <jats:italic>Frontiers in Immunology<\/jats:italic>\n                      was the most productive journal, whereas\n                      <jats:italic>Science<\/jats:italic>\n                      ,\n                      <jats:italic>Cell<\/jats:italic>\n                      , and\n                      <jats:italic>Nature<\/jats:italic>\n                      constituted the major co-cited knowledge base, with 1,172, 729, and 670 co-citations, respectively. Keyword analysis showed that \u201cintratumoral microbiota\u201d was the most frequent term (90 occurrences), with excellent clustering quality (modularity Q\u00a0=\u00a00.6963; silhouette S\u00a0=\u00a00.9351). Research hotspots have gradually shifted from early explorations of gut microbiota, CD8\n                      <jats:sup>+<\/jats:sup>\n                      T cells, and immune mechanisms toward immunotherapy resistance, microbial biomarkers, and microbiota-targeted interventions, including engineered bacteria, extracellular vesicles, and fecal microbiota transplantation.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Research on intratumoral microbiota in cancer immunotherapy has rapidly developed into a distinct interdisciplinary field. Current hotspots are moving from mechanistic exploration toward response prediction and translational intervention. Future studies should prioritize standardized detection, spatial and multi-omics validation, and multicenter prospective evaluation to support the clinical translation of microbiota-based biomarkers and therapeutic strategies.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fimmu.2026.1865305","type":"journal-article","created":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T06:25:48Z","timestamp":1784615148000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Global research trends and emerging frontiers of intratumoral microbiota in cancer immunotherapy: a bibliometric and visualization analysis"],"prefix":"10.3389","volume":"17","author":[{"given":"Jiahe","family":"Zhou","sequence":"first","affiliation":[{"name":"College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine","place":["Changsha, Hunan, 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