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Letter
Next generation sequencing pitfalls in diagnosing trypsinogen (PRSS1) mutations in chronic pancreatitis
  1. Frank U Weiss,
  2. Felix Laemmerhirt,
  3. Markus M Lerch
  1. Medicine A, University Medicine Greifswald, Greifswald, Mecklenburg-Vorpommern, Germany
  1. Correspondence to Professor Markus M Lerch, Medicine A, University Medicine Greifswald, Greifswald 17475, Germany; lerch{at}uni-greifswald.de

https://doi.org/10.1136/gutjnl-2020-322864

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    With interest we read the recent study by Hegyi et al,1 who established that the risk for developing pancreatitis conferred by a haplotype spanning the trypsin locus (PRSS1–PRSS22 3) is strongly dependent on exogenous factors. Changes in PRSS14 or PRSS25 have long been reported to associate with either an increased or a decreased pancreatitis risk, depending on how they contribute to the activation/degradation balance within pancreatic acinar cells. Other germline changes in proteins outside the protease cascade induce pancreatic injury by interfering with intracellular protein processing6 or induction of endoplasmic reticulum stress.7

    All recent guidelines agree that mutations affecting the trypsin locus confer the highest risk of developing pancreatitis and put trypsin (PRSS1) in the first line of testing in patients with suspected hereditary pancreatitis (HP).8 Challenges arising from testing these patients include not only the more than 80 known PRSS1 variants of sometimes uncertain clinical relevance (http://www.pancreasgenetics.org/), but also the progression of diagnostic technology towards next generation sequencing (NGS)—especially in conjunction with consumer genetics offered to the general …

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    Footnotes

    • Contributors FCW helped in the planning and concept of study. Acquisition of data was done by FUW. Data interpretation, writing of the manuscript and manuscript revision were done by FUW, FL and MML.

    • Funding This work was supported by the PePPP-project (ESF/14-BM-A55_0045/16) the EnErGie/P2 Project (ESF/14-BM-A55-0008/18), and the RESPONSE-project (BMBF grant number 03ZZ0921E).

    • Competing interests None declared.

    • Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting or dissemination plans of this research.

    • Patient consent for publication Not required.

    • Ethics approval Local institutional review board, University Medicine Greifswald, Germany, registration number III UV 91/03b.

    • Provenance and peer review Not commissioned; externally peer reviewed.