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Wang Y, Cai M, Jiang X, Lv G, Hu D, Zhang G, Liu J, Wei W, Xiao J, Shen B, Ryu JH, Hu X. Exons 1-3 deletion in FLCN is associated with increased risk of pneumothorax in Chinese patients with Birt-Hogg-Dubé syndrome. Orphanet J Rare Dis 2023; 18:115. [PMID: 37170274 PMCID: PMC10176890 DOI: 10.1186/s13023-023-02710-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 04/30/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND The pathogenic variants responsible for Birt-Hogg-Dubé syndrome (BHDS) in folliculin (FLCN) gene mostly consist of point mutations. Although large intragenic deletions/duplications have been reported in several case reports, the relationship between large intragenic deletions/duplications and phenotype in BHDS remains unclear. METHODS We retrospectively identified and reviewed patients with a large intragenic deletion spanning exons 1-3 and analyzed their phenotypic features to compare with those of point mutation carriers in our hospital from January 1, 2017 to August 31, 2022. RESULTS Twenty unique point mutations (including 4 novel mutations) were detected in 62 patients from 45 families (90%). Exons 1-3 deletion were identified in 8 patients from 5 families (10%) that resided in the same region, Feidong County of Anhui Province, China. Breakpoint analysis indicated that all the deletion breakpoints were flanked by Alu repeats. The prevalence of exons 1-3 deletion carriers in Feidong County was 8.1-times higher than that for BHDS in Anhui Province, suggesting a clustered phenomenon of exons 1-3 deletion. Significantly increased risk of pneumothorax was observed in those with exons 1-3 deletion compared with point mutations (91% vs. 58%, p value 0.047). The risk of renal cancer may be higher in those with exons 1-3 deletion than for those with point mutations (18% vs. 4%, p > 0.05). CONCLUSIONS Large intragenic deletion of exons 1-3 in FLCN was identified as a local aggregation phenomenon in Feidong County, China, and was associated with a significantly higher risk of pneumothorax compared to those with point mutations.
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Affiliation(s)
- Yue Wang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
- BengBu Medical College, Bengbu, Anhui, China
| | - Mengru Cai
- Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China
| | - Xianliang Jiang
- Department of Thoracic Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Guangyu Lv
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
| | - Daiju Hu
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
| | - Guofeng Zhang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China
| | - Jinli Liu
- Department of Dermatology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Wei Wei
- Department of Radiology, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, Anhui, China
| | - Jun Xiao
- Department of Urology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Bing Shen
- School of Basic Medicine, Anhui Medical University, Hefei, Anhui, China
| | - Jay H Ryu
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, USA
| | - Xiaowen Hu
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, Anhui, China.
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Zhang G, Liu J, Wang Y, Wang Y, Jiang X, Peng Y, Xiao J, Wei W, Shen B, Yi L, Ryu JH, Hu X. Correction to: Birt-Hogg-Dubé syndrome encountered at rare lung disease clinic in Anhui province, China. Orphanet J Rare Dis 2022; 17:312. [PMID: 35953843 PMCID: PMC9367028 DOI: 10.1186/s13023-022-02438-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Guofeng Zhang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China.,WanNan Medical College, Wuhu, Anhui, China
| | - Jinli Liu
- Division of Life Sciences and Medicine, Department of Dermatology, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, Anhui, China
| | - Yushuo Wang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China.,WanNan Medical College, Wuhu, Anhui, China
| | - Yue Wang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China.,BengBu Medical College, Bengbu, Anhui, China
| | - Xianliang Jiang
- Division of Life Sciences and Medicine, Department of Thoracic Surgery, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, Anhui, China
| | - Yan Peng
- Division of Life Sciences and Medicine, Department of Pathology, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, Anhui, China
| | - Jun Xiao
- Division of Life Sciences and Medicine, Department of Urology, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, Anhui, China
| | - Wei Wei
- Division of Life Sciences and Medicine, Department of Radiology, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, Anhui, China
| | - Bing Shen
- School of Basic Medicine, Anhui Medical University, Hefei, Anhui, China
| | - Long Yi
- Jiangsu Key Laboratory of Molecular Medicine, School of Medicine, Nanjing University, Nanjing, Jiangsu, China
| | - Jay H Ryu
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, USA
| | - Xiaowen Hu
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China.
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