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MicroRNA regulation in pulmonary fibrosis: a bibliometric analysis of global research trends, collaborative networks, and emerging frontiers

Wu F, He Q, Zhang F, Zhang X, Zhang W

Frontiers in medicine, 2026

Abstract

Background: Pulmonary fibrosis, particularly idiopathic pulmonary fibrosis (IPF), is a progressive and fatal interstitial lung disease with limited treatment options. MicroRNAs (miRNAs) have emerged as critical regulators of fibrotic processes, yet a systematic overview of the research landscape in this rapidly growing field is lacking.

Methods: We performed a comprehensive bibliometric analysis of publications on miRNA regulation in pulmonary fibrosis from January 1, 2000, to December 31, 2025, using the Web of Science Core Collection and Scopus databases. After deduplication, a total of 2,093 valid documents (articles and reviews) were analyzed. Multiple analytical tools-VOSviewer (v1.6.20), CiteSpace (v6.4R1), and the bibliometrix R package (v3.2.1)-were employed to examine annual publication trends, collaborative networks (countries, institutions, authors), co-citation clusters, citation bursts, journal dual-map overlays, and keyword evolution.

Results: The annual publication output increased steadily from 2007 to 2021, peaking at 229 papers, then stabilized at 150-193 papers per year (2022-2025). China (889 papers, 38.4%) and the United States (477 papers, 20.6%) were the most productive countries, although United States and European papers exhibited higher average citation impact (United States: 74.79; Germany: 86.49) compared to China (29.28). Nanjing Medical University (43 papers) and the University of Pittsburgh (28 papers) were leading institutions. Author…

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