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Masson E, Zou WB, Pu N, Rebours V, Génin E, Wu H, Lin JH, Wang YC, Abrantes A, Aguilera Munoz L, Albouys J, Alric L, Amiot X, Archambeaud I, Audiau S, Bastide L, Baudon J, Bellaiche G, Bellon S, Bertrand V, Bideau K, Billiemaz K, Billioud C, Bonnefoy S, Borderon C, Bournet B, Breton E, Brugel M, Buscail L, Cadiot G, Camus M, Causse X, Chamouard P, Chaput U, Cholet F, Ciocan DM, Clavel C, Coffin B, Coimet-Berger L, Creveaux I, Culetto A, Daboussi O, Mestier LDE, Degand T, D'Engremont C, Denis B, Dermine S, Desgrippes R, D'Aubigny AD, Enaud R, Fabre A, Gargot D, Gelsi E, Gentilcore E, Gincul R, Ginglinger-Favre E, Giovannini M, Gomercic C, Gondran H, Grainville T, Grandval P, Grasset D, Grimaldi S, Grimbert S, Hagege H, Heissat S, Hentic O, Herber-Mayne A, Hervouet M, Hoibian S, Jacques J, Jais B, Kaassis M, Koch S, Lacaze E, Lacroute J, Lamireau T, Laurent L, Guillou XLE, Rhun MLE, Leblanc S, Levy P, Lievre A, Lorenzo D, Maire F, Marcel K, Matias C, Mauillon J, Morgant S, Moussata D, Muller N, Nambot S, Napoleon B, Olivier A, Pagenault M, Pelletier AL, Pennec O, Pinard F, Pioche M, Prost B, Queneherve L, Rebours V, Reboux N, Rekik S, Riachi G, Rohmer B, Roquelaure B, Hezode IR, Rostain F, Saurin JC, Servais L, Stan-Iuga R, Subtil C, Texier C, Thomassin L, Tougeron D, Tsakiris L, Valats JC, Vuitton L, Wallenhorst T, Wangerme M, Zanaldi H, Zerbib F. Classification of PRSS1 variants responsible for chronic pancreatitis: An expert perspective from the Franco-Chinese GREPAN study group. Pancreatology 2023; 23:491-506. [PMID: 37581535 DOI: 10.1016/j.pan.2023.04.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/06/2023] [Accepted: 04/13/2023] [Indexed: 08/16/2023]
Abstract
BACKGROUND PRSS1 was the first reported chronic pancreatitis (CP) gene. The existence of both gain-of-function (GoF) and gain-of-proteotoxicity (GoP) pathological PRSS1 variants, together with the fact that PRSS1 variants have been identified in CP subtypes spanning the range from monogenic to multifactorial, has made the classification of PRSS1 variants very challenging. METHODS All currently reported PRSS1 variants (derived primarily from two databases) were manually reviewed with respect to their clinical genetics, functional analysis and population allele frequency. They were classified by variant type and pathological mechanism within the framework of our recently proposed ACMG/AMP guidelines-based seven-category system. RESULTS The total number of distinct germline PRSS1 variants included for analysis was 100, comprising 3 copy number variants (CNVs), 12 5' and 3' variants, 19 intronic variants, 5 nonsense variants, 1 frameshift deletion variant, 6 synonymous variants, 1 in-frame duplication, 3 gene conversions and 50 missense variants. Based upon a combination of clinical genetic and functional analysis, population data and in silico analysis, we classified 26 variants (all 3 CNVs, the in-frame duplication, all 3 gene conversions and 19 missense) as "pathogenic", 3 variants (missense) as "likely pathogenic", 5 variants (four missense and one promoter) as "predisposing", 13 variants (all missense) as "unknown significance", 2 variants (missense) as "likely benign", and all remaining 51 variants as "benign". CONCLUSIONS We describe an expert classification of the 100 PRSS1 variants reported to date. The results have immediate implications for reclassifying many ClinVar-registered PRSS1 variants as well as providing optimal guidelines/standards for reporting PRSS1 variants.
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Affiliation(s)
- Emmanuelle Masson
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France; Service de Génétique Médicale et de Biologie de la Reproduction, CHRU Brest, F-29200, Brest, France
| | - Wen-Bin Zou
- Department of Gastroenterology, Changhai Hospital, The Secondary Military Medical University, Shanghai, China; Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Na Pu
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France; Department of Critical Care Medicine, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Vinciane Rebours
- Pancreatology and Digestive Oncology Department, Beaujon Hospital, APHP - Clichy, Université Paris Cité, Paris, France
| | - Emmanuelle Génin
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France; Service de Génétique Médicale et de Biologie de la Reproduction, CHRU Brest, F-29200, Brest, France
| | - Hao Wu
- Department of Gastroenterology, Changhai Hospital, The Secondary Military Medical University, Shanghai, China; Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Jin-Huan Lin
- Department of Gastroenterology, Changhai Hospital, The Secondary Military Medical University, Shanghai, China; Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Yuan-Chen Wang
- Department of Gastroenterology, Changhai Hospital, The Secondary Military Medical University, Shanghai, China; Shanghai Institute of Pancreatic Diseases, Shanghai, China
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- Hôpital d'instruction des armées Percy, Clamart, France
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