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Fibrillin 2 (FBN2) was first discovered while studying Marfan syndrome, and its encoded products are associated with elastin fibres. To date, the role of FBN2 in BLCA remains unclear. The authors first downloaded data from The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO). The patients were divided into high FBN2 expression and low FBN2 expression groups, and the survival curve, clinical characteristics, tumour microenvironment (TME), and immune cell differences were analysed between the two groups. Then, the differentially expressed genes (DEGs) were filtered, and functional enrichment for DEGs was performed. Finally, chemotherapy drug susceptibility analysis based on the high and low FBN2 groups was conducted. The authors found upregulated expression of FBN2 in BLCA and proved that FBN2 could be an independent prognostic factor for BLCA. TME analysis showed that the expression of FBN2 affects several aspects of the TME. The upregulated expression of FBN2 was associated with a high stromal score, which may lead to immunosuppression and be detrimental to immunotherapy. In addition, the authors found that NK cells resting, macrophage M0 infiltration, and other phenomena of immune cell infiltration appeared in the high expression group of FBN2. The high expression of FBN2 was related to the high sensitivity of some chemotherapy drugs. The authors systematically investigated the effects and mechanisms of FBN2 on BLCA and provided a new understanding of the role of FBN2 as a risk factor and TME influencer in BLCA.<\/jats:p>","DOI":"10.1049\/syb2.12067","type":"journal-article","created":{"date-parts":[[2023,6,20]],"date-time":"2023-06-20T00:55:23Z","timestamp":1687222523000},"page":"162-173","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["A comprehensive analysis of FBN2 in bladder cancer: A risk factor and the tumour microenvironment influencer"],"prefix":"10.1049","volume":"17","author":[{"given":"Zechao","family":"Lu","sequence":"first","affiliation":[{"name":"Department of Urology The Eighth Affiliated Hospital Sun Yat\u2010sen University  Shenzhen Guangdong China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zeguang","family":"Lu","sequence":"additional","affiliation":[{"name":"The Second Clinical College of Guangzhou 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