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Stefanovics R, Sándor M, Demcsák A, Berke G, Németh BC, Zhang W, Abu-El-Haija M, Sahin-Tóth M. Novel chymotrypsin C (CTRC) variants from real-world genetic testing of pediatric chronic pancreatitis cases. Pancreatology 2024; 24:690-697. [PMID: 38876922 DOI: 10.1016/j.pan.2024.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/07/2024] [Accepted: 06/10/2024] [Indexed: 06/16/2024]
Abstract
BACKGROUND Chymotrypsin C (CTRC) protects the pancreas against unwanted intrapancreatic trypsin activity through degradation of trypsinogen. Loss-of-function CTRC variants increase the risk for chronic pancreatitis (CP). The aim of the present study was to characterize novel CTRC variants found during genetic testing of CP cases at a pediatric pancreatitis center. METHODS We used next-generation sequencing to screen patients. We analyzed the functional effects of CTRC variants in HEK 293T cells and using purified enzymes. RESULTS In 5 separate cases, we detected 5 novel heterozygous CTRC variants: c.407C>T (p.Thr136Ile), c.550G>A (p.Ala184Thr), c.627Cdup (p.Ser210Leufs∗?, where the naming indicates a frame shift with no stop codon), c.628T>C (p.Ser210Pro), and c.779A>G (p.Asp260Gly). Functional studies revealed that with the exception of p.Ser210Leufs∗?, the CTRC variants were secreted normally from transfected cells. Enzyme activity of purified variants p.Thr136Ile, p.Ala184Thr, and p.Asp260Gly was similar to that of wild-type CTRC, whereas variant p.Ser210Pro was inactive. The frame-shift variant p.Ser210Leufs∗? was not secreted but accumulated intracellularly, and induced endoplasmic reticulum stress, as judged by elevated mRNA levels of HSPA5 and DDIT3, and increased mRNA splicing of XBP1. CONCLUSIONS CTRC variants p.Ser210Pro and p.Ser210Leufs∗? abolish CTRC function and should be classified as pathogenic. Mechanistically, variant p.Ser210Pro directly affects the amino acid at the bottom of the substrate-binding pocket while the frame-shift variant promotes misfolding and thereby blocks enzyme secretion. Importantly, 3 of the 5 novel CTRC variants proved to be benign, indicating that functional analysis is indispensable for reliable determination of pathogenicity and the correct interpretation of genetic test results.
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Affiliation(s)
- Regina Stefanovics
- Department of Surgery, University of California Los Angeles, Los Angeles, CA, USA; Hungarian Centre of Excellence for Molecular Medicine - University of Szeged, Translational Pancreatology Research Group, Szeged, Hungary; Center for Gastroenterology, Department of Medicine, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Máté Sándor
- Department of Surgery, University of California Los Angeles, Los Angeles, CA, USA
| | - Alexandra Demcsák
- Department of Surgery, University of California Los Angeles, Los Angeles, CA, USA
| | - Gergő Berke
- Department of Surgery, University of California Los Angeles, Los Angeles, CA, USA
| | - Balázs Csaba Németh
- Hungarian Centre of Excellence for Molecular Medicine - University of Szeged, Translational Pancreatology Research Group, Szeged, Hungary; Center for Gastroenterology, Department of Medicine, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Wenying Zhang
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Maisam Abu-El-Haija
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, USA; Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Miklós Sahin-Tóth
- Department of Surgery, University of California Los Angeles, Los Angeles, CA, USA.
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Phadke MY, Sellers ZM. Current clinical opinion on CFTR dysfunction and patient risk of pancreatitis: diagnostic and therapeutic considerations. Expert Rev Gastroenterol Hepatol 2022; 16:499-509. [PMID: 35623009 PMCID: PMC9256802 DOI: 10.1080/17474124.2022.2084072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 05/26/2022] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Cystic fibrosis transmembrane conductance regulator (CFTR)-mediated chloride and bicarbonate secretion is integral to the pancreas' ability to produce the alkaline pancreatic juice required for proper activation of enzymes for digestion. Disruption in this process increases the risk for pancreatitis. AREAS COVERED Using original basic and clinical research, as well as clinical case reports and recent reviews indexed in PubMed, we discuss why patients with CFTR dysfunction are at risk for pancreatitis. We also discuss diagnostic modalities for assessing CFTR function, as well as new therapeutic advancements and the impact these are having on pancreatic function, pancreatitis in particular. EXPERT OPINION CFTR-related pancreatitis occurs in the presence of monallelic or biallelic mutations and/or from toxin-mediated channel disruption. Research-based CFTR diagnostics have been expanded, yet all current methods rely on measuring CFTR chloride transport in non-pancreatic cells/tissue. Newer CFTR-directed therapies ('CFTR modulators') are both improving pancreatitis (pancreatic-sufficient CF patients) and increasing the risk for pancreatitis (previously pancreatic-insufficient CF patients). Our experiences with these drugs are enlightening us on how CFTR modulation can affect pancreatitis risk across a wide spectrum of pancreatic disease, and represents an opportunity for therapeutic relief from pancreatitis in those without CF, but who suffer from CFTR-related pancreatitis.
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Affiliation(s)
- Madhura Y. Phadke
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Stanford University, 750 Welch Road, Suite 116, Palo Alto, CA
| | - Zachary M. Sellers
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Stanford University, 750 Welch Road, Suite 116, Palo Alto, CA
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Mun KS, Nathan JD, Lin TK, Elder DA, Jegga AG, Naren AP, Abu-El-Haija M. Is There a Benefit From Islet Autotransplantation in Patients With Type 1 Diabetes Mellitus Undergoing Total Pancreatectomy? Pancreas 2022; 51:399-403. [PMID: 35775640 PMCID: PMC9260907 DOI: 10.1097/mpa.0000000000002017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
ABSTRACT Children with acute recurrent and chronic pancreatitis (CP) experience abdominal pain that leads to hospitalizations, opioid dependence, and poor quality of life. Total pancreatectomy with islet autotransplantation (TPIAT) is offered as a surgical option in management of debilitating pancreatitis that fails medical and endoscopic therapy to reduce or eliminate pain. Given that patients with type 1 diabetes mellitus (T1DM) lack insulin-producing β cells, the outcomes from autotransplanting islet isolates back into total pancreatectomy patients with T1DM are not fully known.We performed TPIAT in 2 CP patients who also had a diagnosis of T1DM for at least 6 years before the operation and evaluated the clinical and laboratory outcomes before and after the operation. Postoperatively both patients' abdominal pain had significantly subsided, they were weaned off opioid medications, and they were able to return to full-time school attendance. In addition, total daily dose of insulin in 1 patient was able to be slightly reduced at 12 months post-TPIAT. We observed in vitro that residual α cells and β cells in T1DM islets were able to secrete a small amount of glucagon and insulin, respectively.
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Affiliation(s)
- Kyu Shik Mun
- Division of Pulmonary Medicine, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Jaimie D. Nathan
- Division of Pediatric General and Thoracic Surgery, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH
- Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH
- Department of Abdominal Transplant and Hepatopancreatobiliary Surgery, Nationwide Children’s Hospital, Columbus, OH
- Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Tom K. Lin
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Deborah A. Elder
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
- Division of Endocrinology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH
| | - Anil G. Jegga
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
- Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH
| | - Anjaparavanda P. Naren
- Division of Pulmonary Medicine, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
- Division of Pulmonary Medicine, Cystic Fibrosis Research Center, Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH
| | - Maisam Abu-El-Haija
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
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Zeng J, Zhang J, Hu Y, Wang X, Deng Z. Risk factors for the progression from acute recurrent to chronic pancreatitis among children in China. Front Pediatr 2022; 10:908347. [PMID: 35958176 PMCID: PMC9357905 DOI: 10.3389/fped.2022.908347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 07/07/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Risk factors for progression from acute recurrent pancreatitis (ARP) to chronic pancreatitis (CP) in children are poorly understood. AIM To summarize the clinical characteristics of children with ARP and CP, identify the risk factors of CP, and investigate the factors associated with rapid progression from initial onset of ARP to CP. METHODS The following variables were included in the risk factor analysis: sex, age at onset, family history, pancreas or biliary tract structural abnormalities, and genetic variations. Univariate and multivariate logistic regression analyses were used to assess the risk factors of CP. The Kaplan-Meier curves of the ARP progression to CP for various risk factor groupings were constructed and compared using the log-rank test. The Cox proportional hazard regression model was fitted to estimate the hazard ratio (HR) of progression to CP for each risk variable. RESULTS In total, 276 children were studied, of whom 136 progressed to CP. Among them, 41 had pancreatic duct obstructive disease; 105 underwent genetic testing, of whom 68 were found to have genetic variations. Among the remaining 140 patients who did not progress to CP, 61 had biliary obstructions. Forty-three of these children underwent genetic testing, and 15 were found to have genetic variations. Risk factor analysis showed that children with gene mutations were at a higher risk of progressing to CP [odds ratio (OR) = 3.482; 95% confidence interval (CI): 1.444-8.398; P = 0.005]; children with pancreas divisum (PD) had a higher risk of CP than those without (OR = 8.665; 95% CI: 1.884, 9.851; P = 0.006). Further, children whose first ARP occurred at an older age might develop CP faster (HR = 1.070; 95% CI: 1.003, 1.141; P = 0.039). Children with gene mutations had a faster rate of progression to CP after onset than children without gene mutations (HR = 1.607; 95% CI: 1.024, 2.522; P = 0.039), PRSS1 gene mutations were more associated (P = 0.025). There was no difference in the rate of progression from ARP to CP in children with PD (P = 0.887); however, endoscopic retrograde cholangiopancreatography (ERCP) intervention delayed the progression to CP in ARP patients with PD (P = 0.033). CONCLUSION PRSS1 gene mutations and PD are key risk factors for ARP progression to CP in children. PD itself does not affect the disease progression rate, but therapeutic ERCP can be beneficial to patients with ARP with symptomatic PD and delay the progression to CP.
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Affiliation(s)
- Jingqing Zeng
- Department of Pediatric Digestive, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiayu Zhang
- Department of Pediatric Digestive, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yabin Hu
- Department of Clinical Epidemiology and Biostatistics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiumin Wang
- Department of Pediatric Endocrinology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhaohui Deng
- Department of Pediatric Digestive, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Pancreatic Associated Manifestations in Pediatric Inflammatory Bowel Diseases. Genes (Basel) 2021; 12:genes12091372. [PMID: 34573354 PMCID: PMC8465218 DOI: 10.3390/genes12091372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 08/28/2021] [Accepted: 08/29/2021] [Indexed: 12/16/2022] Open
Abstract
Inflammatory bowel diseases (IBDs) are chronic relapsing inflammatory conditions of the gastrointestinal tract, encompassing Crohn’s disease (CD), ulcerative colitis (UC) and inflammatory bowel disease unclassified (IBD-U). They are currently considered as systemic disorders determined by a set of genetic predispositions, individual susceptibility and environmental triggers, potentially able to involve other organs and systems than the gastrointestinal tract. A large number of patients experiences one or more extraintestinal manifestations (EIMs), whose sites affected are mostly represented by the joints, skin, bones, liver, eyes, and pancreas. Pancreatic abnormalities are not uncommon and are often underestimated, encompassing acute and chronic pancreatitis, autoimmune pancreatitis, exocrine pancreatic insufficiency and asymptomatic elevation of pancreatic enzymes. In most cases they are the result of environmental triggers. However, several genetic polymorphisms may play a role as precipitating factors or contributing to a more severe course. The aim of this paper is to provide an updated overview on the available evidence concerning the etiology, pathogenesis and clinical presentation of pancreatic diseases in IBD pediatric patients.
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Girodon E, Rebours V, Chen JM, Pagin A, Levy P, Ferec C, Bienvenu T. Clinical interpretation of SPINK1 and CTRC variants in pancreatitis. Pancreatology 2020; 20:1354-1367. [PMID: 32948427 DOI: 10.1016/j.pan.2020.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 12/11/2022]
Abstract
Since the description of the SPINK1 gene encoding the serine protease inhibitor Kazal type 1 and the CTRC gene encoding the Chymotrypsin C as being involved in chronic pancreatitis, more than 56 SPINK1 and 87 CTRC variants have been reported. Assessing the clinical relevance of SPINK1 and CTRC variants is often complicated in the absence of functional evidence and interpretation of rare variants is not very easy in clinical practice. The aim of this study was to review the different variants identified in these two genes and to classify them according to their degree of damaging effect. This classification was based on the results of in vitro experiments, in silico analysis using different prediction tools, and on population data, in comparing the allelic frequency of each variant in patients with pancreatitis and in unaffected control individuals. This review should help geneticists and clinicians in charge of patient's care and genetic counseling to interpret the results of genetic studies.
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Affiliation(s)
- Emmanuelle Girodon
- Laboratoire de Génétique et Biologie Moléculaires, Hôpital Cochin, APHP. Centre-Université de Paris, France
| | - Vinciane Rebours
- Service de Pancréatologie-Gastroentérologie, Pôle des Maladies de l'Appareil Digestif, Université Denis Diderot, Hôpital Beaujon, APHP, DHU UNITY, Clichy, France; Centre de Référence des Maladies Rares du Pancréas, PAncreaticRaresDISeases (PaRaDis), France
| | - Jian Min Chen
- UMR1078 "Génétique, Génomique Fonctionnelle et Biotechnologies", INSERM, EFS - Bretagne, Université de Brest, CHRU Brest, Brest, France
| | - Adrien Pagin
- CHU Lille, Service de Toxicologie et Génopathies, Lille, France
| | - Philippe Levy
- Service de Pancréatologie-Gastroentérologie, Pôle des Maladies de l'Appareil Digestif, Université Denis Diderot, Hôpital Beaujon, APHP, DHU UNITY, Clichy, France
| | - Claude Ferec
- Centre de Référence des Maladies Rares du Pancréas, PAncreaticRaresDISeases (PaRaDis), France
| | - Thierry Bienvenu
- Laboratoire de Génétique et Biologie Moléculaires, Hôpital Cochin, APHP. Centre-Université de Paris, France.
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Clinical and Practice Variations in Pediatric Acute Recurrent or Chronic Pancreatitis: Report From the INSPPIRE Study. J Pediatr Gastroenterol Nutr 2020; 71:112-118. [PMID: 32079978 PMCID: PMC7305964 DOI: 10.1097/mpg.0000000000002661] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE The aim of the study was to determine whether clinical characteristics and management of pediatric acute recurrent pancreatitis (ARP) and chronic pancreatitis (CP) differ across INSPPIRE (INternational Study Group of Pediatric Pancreatitis: In Search for a cuRE) sites. STUDY DESIGN Data were collected from INSPPIRE and analyzed per US regions and "non-US" sites. Between-group differences were compared by Pearson chi-square test. Differences in disease burden were compared by Kruskal-Wallis test. RESULTS Out of the 479 subjects, 121 (25%) were enrolled in West, 151 (32%) Midwest, 45 Northeast (9%), 78 (16%) South, and 84 (18%) at non-US sites. Hispanic ethnicity was more common in South (P < 0.0001); white race in Northeast (P = 0.009). CP was less common and time from diagnosis of first acute pancreatitis to CP was longer in children at non-US sites (P = 0.0002 and P = 0.011, respectively). Genetic mutations were most common among all groups; PRSS1 variants predominated in Midwest (P = 0.002). Gallstones were more frequent in South (P = 0.002). Endoscopic retrograde cholangiopancreatography (ERCP) and computed tomography (CT) imaging were more commonly utilized in United States compared with non-United States (P < 0.0001), but there were no differences in the use of MRI/MRCP. Disease burden was highest in the West and Midwest, possibly as total pancreatectomy and islet autotransplantation (TPIAT) referral sites were located in these regions. All therapies were less commonly administered in non-US sites (P < 0.0001). CONCLUSIONS This is the first study to describe geographical variations in the INSPPIRE cohort, which possibly reflect variations in practice and referral patterns. The underlying reason behind the lower frequency of CP and fewer treatments in non-United States sites need to be further explored.
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Abu-El-Haija M, Valencia CA, Hornung L, Youssef N, Thompson T, Barasa NW, Wang X, Denson LA. Genetic variants in acute, acute recurrent and chronic pancreatitis affect the progression of disease in children. Pancreatology 2019; 19:535-540. [PMID: 31088717 PMCID: PMC6589390 DOI: 10.1016/j.pan.2019.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND/OBJECTIVES Acute pancreatitis (AP) is emerging in pediatrics. A subset of children with AP progresses to acute recurrent pancreatitis (ARP) and chronic pancreatitis (CP). The role of extensive gene testing in the progression has not been investigated previously. We have followed children enrolled in the registry and at our center for progression to ARP and CP after the first attack. METHODS This study utilizes an extensive gene sequencing panel as a platform to evaluate the role of genetics in first attack AP, and the progression over time, from first attack to ARP and CP in children. RESULTS Genes, with corresponding variants were involved in the 3 groups studied: AP, ARP and CP. We have shown that the presence of gene variants from the eight tested genes is enriched in the CP group compared to the AP and ARP groups. The presence of more than one gene was associated with CP (p = 0.01). SPINK1 mutation(s) was significantly associated with faster progression to ARP, (p = 0.04). Having a variant from CFTR, SPINK1 or PRSS1, was associated with the faster progression from AP to CP over time (p < 0.05). CONCLUSIONS This study shows that genetics have a significant role in progression to ARP and CP from the first attack of pancreatitis.
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Affiliation(s)
- Maisam Abu-El-Haija
- Cincinnati Children's Hospital Medical Center, Gastroenterology, Hepatology & Nutrition, 3333 Burnet Ave, Cincinnati, OH, 45229, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | | | - Lindsey Hornung
- Cincinnati Children's Hospital Medical Center, Biostatistics and Epidemiology, 3333 Burnet Ave, Cincinnati, OH, 45229, USA.
| | - Nour Youssef
- Cincinnati Children's Hospital, Clinical Rotation, LAU, School of Medicine, Lebanon.
| | - Tyler Thompson
- Cincinnati Children's Hospital Medical Center, Gastroenterology, Hepatology & Nutrition, 3333 Burnet Ave, Cincinnati, OH, 45229, USA.
| | - Nathaniel W Barasa
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Laboratory Genetics and Genomics, 3333 Burnet Ave, Cincinnati, OH, 45229, USA.
| | - Xinjian Wang
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Laboratory Genetics and Genomics, 3333 Burnet Ave, Cincinnati, OH, 45229, USA.
| | - Lee A Denson
- Cincinnati Children's Hospital Medical Center, Gastroenterology, Hepatology & Nutrition, 3333 Burnet Ave, Cincinnati, OH, 45229, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
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Tang XY, Lin JH, Zou WB, Masson E, Boulling A, Deng SJ, Cooper DN, Liao Z, Férec C, Li ZS, Chen JM. Toward a clinical diagnostic pipeline for SPINK1 intronic variants. Hum Genomics 2019; 13:8. [PMID: 30755276 PMCID: PMC6373104 DOI: 10.1186/s40246-019-0193-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/25/2019] [Indexed: 02/07/2023] Open
Abstract
Background The clinical significance of SPINK1 intronic variants in chronic pancreatitis has been previously assessed by various approaches including a cell culture-based full-length gene assay. A close correlation between the results of this assay and in silico splicing prediction was apparent. However, until now, a clinical diagnostic pipeline specifically designed to classify SPINK1 intronic variants accurately and efficiently has been lacking. Herein, we present just such a pipeline and explore its efficacy and potential utility in potentiating the classification of newly described SPINK1 intronic variants. Results We confirm a close correlation between in silico splicing prediction and results from the cell culture-based full-length gene assay in the context of three recently reported pathogenic SPINK1 intronic variants. We then integrated in silico splicing prediction and the full-length gene assay into a stepwise approach and tested its utility in the classification of two novel datasets of SPINK1 intronic variants. The first dataset comprised 16 deep intronic variants identified in 52 genetically unexplained Chinese chronic pancreatitis patients by sequencing the entire intronic sequence of the SPINK1 gene. The second dataset comprised five novel rare proximal intronic variants identified through the routine analysis of the SPINK1 gene in French pancreatitis patients. Employing a minor allele frequency of > 5% as a population frequency filter, 6 of the 16 deep intronic variants were immediately classified as benign. In silico prediction of the remaining ten deep intronic variants and the five rare proximal intronic variants with respect to their likely impact on splice site selection suggested that only one proximal intronic variant, c.194 + 5G > A, was likely to be of functional significance. Employing the cell culture-based full-length gene assay, we functionally analyzed c.194 + 5G > A, together with seven predicted non-functional variants, thereby validating their predicted effects on splicing in all cases. Conclusions We demonstrated the accuracy and efficiency of in silico prediction in combination with the cell culture-based full-length gene assay for the classification of SPINK1 intronic variants. Based upon these findings, we propose an operational pipeline for classifying SPINK1 intronic variants in the clinical diagnostic setting. Electronic supplementary material The online version of this article (10.1186/s40246-019-0193-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xin-Ying Tang
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China.,Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Jin-Huan Lin
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China.,Shanghai Institute of Pancreatic Diseases, Shanghai, China.,EFS, Univ Brest, Inserm, UMR 1078, GGB, 29200, Brest, France
| | - Wen-Bin Zou
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China.,Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Emmanuelle Masson
- EFS, Univ Brest, Inserm, UMR 1078, GGB, 29200, Brest, France.,CHU Brest, Service de Génétique, Brest, France
| | - Arnaud Boulling
- EFS, Univ Brest, Inserm, UMR 1078, GGB, 29200, Brest, France
| | - Shun-Jiang Deng
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China.,Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - David N Cooper
- Institute of Medical Genetics, School of Medicine, Cardiff University, Cardiff, UK
| | - Zhuan Liao
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China. .,Shanghai Institute of Pancreatic Diseases, Shanghai, China.
| | - Claude Férec
- EFS, Univ Brest, Inserm, UMR 1078, GGB, 29200, Brest, France.,CHU Brest, Service de Génétique, Brest, France
| | - Zhao-Shen Li
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China. .,Shanghai Institute of Pancreatic Diseases, Shanghai, China.
| | - Jian-Min Chen
- EFS, Univ Brest, Inserm, UMR 1078, GGB, 29200, Brest, France.
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Abu-El-Haija M, Lowe ME. Pediatric Pancreatitis-Molecular Mechanisms and Management. Gastroenterol Clin North Am 2018; 47:741-753. [PMID: 30337030 DOI: 10.1016/j.gtc.2018.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pediatric pancreatitis is an emerging field with an increasing incidence of disease. Management of pediatric pancreatitis is understudied and, therefore, extrapolated from adult studies (although the etiologies are different). There is evidence that feeding is safe in mild acute pancreatitis in children without increased pain or length of stay. Studies are needed to predict course of the disease, disease severity, and risk of chronic pancreatitis in children.
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Affiliation(s)
- Maisam Abu-El-Haija
- Pediatric Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave MLC 2010, Cincinnati, Ohio 45229, USA
| | - Mark E Lowe
- Pediatric Gastroenterology, Hepatology and Nutrition, Washington University School of Medicine, 660 South Euclid Avenue, MPRB 4th Floor, Campus Box 8208, St Louis, MO 63110, USA.
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Abstract
PURPOSE OF REVIEW Genetic mutations in genes within and outside of the trypsin-dependent pathologic pathway have been found to be associated with chronic pancreatitis. This review highlights recent developments. RECENT FINDINGS CTRB1-CTRB2 has been identified as a new risk locus for chronic pancreatitis and the disease mechanism may involve trypsin degradation. Misfolding mutations in PRSS1, CPA1, and CEL, as well as environmental stress factors like tobacco and alcohol can trigger endoplasmic reticulum stress (ER-Stress). SUMMARY Protein misfolding as well as enzyme activity changes due to altered autoactivation, intracellular degradation, or enzyme inhibition represent the most important pathological mechanisms of chronic pancreatitis to date. Analysis of composite risk patterns by next-generation sequencing will help elucidate complex gene interactions and identify new potential therapeutic targets.
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12
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Pediatric chronic pancreatitis: Updates in the 21st century. Pancreatology 2018; 18:354-359. [PMID: 29724605 DOI: 10.1016/j.pan.2018.04.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 04/25/2018] [Accepted: 04/26/2018] [Indexed: 12/11/2022]
Abstract
Pediatric Pancreatitis has gained a lot of attention in the last decade. Updates in medical management include new testing technologies in genetics, function testing and imaging modalities. Updates in surgical management have taken place as well, with total pancreatectomy islet auto transplantation reserved for a specific patient population that meets the clinical criteria. Multidisciplinary team management is needed for patients with chronic pancreatitis to ensure optimal outcomes.
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Abu-El-Haija M, El-Dika S, Hinton A, Conwell DL. Acute Pancreatitis Admission Trends: A National Estimate through the Kids' Inpatient Database. J Pediatr 2018; 194:147-151.e1. [PMID: 29174078 PMCID: PMC6136833 DOI: 10.1016/j.jpeds.2017.09.061] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 09/13/2017] [Accepted: 09/21/2017] [Indexed: 12/15/2022]
Abstract
OBJECTIVES To evaluate national health care use and costs for pediatric acute pancreatitis. STUDY DESIGN The Kids' Inpatient Database for 2006, 2009, and 2012 was queried for patients with a principal diagnosis of acute pancreatitis. Cases were grouped by age: preschool (<5 years of age), school age (5-14 years of age), and adolescents (>14 years of age). RESULTS A total of 27 983 discharges for acute pancreatitis were found. The number of admissions increased with age: young n = 1279, middle n = 8012, and older n = 18 692. Duration of stay was highest in preschool children (median, 3.47 days; IQR, 2.01-7.35), compared with school age (median, 3.22 days; IQR, 1.81-5.63) and adolescents (median, 2.87 days; IQR, 1.61-4.81; P < .001). The median cost of hospitalization varied with age: $6726 for preschoolers, $5400 for school-aged children, and $5889 for adolescents (P < .001). Acute pancreatitis-associated diagnoses varied by age. The presence of gallstone pancreatitis, alcohol, and hypertriglyceridemia was more common among older children compared with younger children (P < .001). There was an increasing trend in acute pancreatitis, chronic pancreatitis, and obesity for the 2 older age groups (P < .001). CONCLUSION Admission of children for acute pancreatitis constitutes a significant healthcare burden, with a rising number of admissions with age. However, the cost and duration of stay per admission are highest in young children.
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Affiliation(s)
- Maisam Abu-El-Haija
- Cincinnati Children's Hospital Medical Center, Division of Gastroenterology, Hepatology and Nutrition, Cincinnati, OH.
| | - Samer El-Dika
- Ohio State University Wexner Medical Center, Division of Gastroenterology, Hepatology and Nutrition
| | - Alice Hinton
- Ohio State University, College of Public Health, Division of Biostatistics, Columbus, OH
| | - Darwin L. Conwell
- Ohio State University Wexner Medical Center, Division of Gastroenterology, Hepatology and Nutrition
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Vitale DS, Abu-El-Haija M, Lin TK. Predicting Pancreatitis Phenotype Based on a Shared Genotype. Pancreas 2018; 47:e3-e4. [PMID: 29346218 DOI: 10.1097/mpa.0000000000000972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- David S Vitale
- Division of Gastroenterology Hepatology, and Nutrition Cincinnati Children's Hospital Medical Center Cincinnati, OH
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Vitale DS, Abu-El-Haija M. Genetic Testing in Children with Recurrent and Chronic Pancreatitis. J Pediatr 2017; 191:10-11. [PMID: 29173293 DOI: 10.1016/j.jpeds.2017.09.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 09/15/2017] [Indexed: 12/17/2022]
Affiliation(s)
- David S Vitale
- Cincinnati Children's Hospital Medical Center Cincinnati, Ohio
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Xiao Y, Yuan W, Yu B, Guo Y, Xu X, Wang X, Yu Y, Yu Y, Gong B, Xu C. Targeted Gene Next-Generation Sequencing in Chinese Children with Chronic Pancreatitis and Acute Recurrent Pancreatitis. J Pediatr 2017; 191:158-163.e3. [PMID: 29173301 DOI: 10.1016/j.jpeds.2017.08.063] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 06/24/2017] [Accepted: 08/23/2017] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To identify causal mutations in certain genes in children with acute recurrent pancreatitis (ARP) or chronic pancreatitis (CP). STUDY DESIGN After patients were enrolled (CP, 55; ARP, 14) and their clinical characteristics were investigated, we performed next-generation sequencing to detect nucleotide variations among the following 10 genes: cationic trypsinogen protease serine 1 (PRSS1), serine protease inhibitor, Kazal type 1 (SPINK1), cystic fibrosis transmembrane conductance regulator gene (CFTR), chymotrypsin C (CTRC), calcium-sensing receptor (CASR), cathepsin B (CTSB), keratin 8 (KRT8), CLAUDIN 2 (CLDN2), carboxypeptidase A1 (CPA1), and ATPase type 8B member 1 (ATP8B1). Mutations were searched against online databases to obtain information on the cause of the diseases. Certain novel mutations were analyzed using the SIFT2 and Polyphen-2 to predict the effect on protein function. RESULTS There were 45 patients with CP and 10 patients with ARP who harbored 1 or more mutations in these genes; 45 patients had at least 1 mutation related to pancreatitis. Mutations were observed in the PRSS1, SPINK1, and CFTR genes in 17 patients, the CASR gene in 5 patients, and the CTSB, CTRC, and KRT8 genes in 1 patient. Mutations were not found in the CLDN, CPA1, or ATP8B1 genes. We found that mutations in SPINK1 may increase the risk of pancreatic duct stones (OR, 11.07; P = .003). The patients with CFTR mutations had a higher level of serum amylase (316.0 U/L vs 92.5 U/L; P = .026). CONCLUSION Mutations, especially those in PRSS1, SPINK1, and CFTR, accounted for the major etiologies in Chinese children with CP or ARP. Children presenting mutations in the SPINK1 gene may have a higher risk of developing pancreatic duct stones.
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Affiliation(s)
- Yuan Xiao
- Pediatric Department, Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Wentao Yuan
- Department of Genetics, Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center and Shanghai Industrial Technology Institute (SITI), Shanghai, China
| | - Bo Yu
- School of Clinical Medicine, Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Yan Guo
- Pediatric Department, Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Xu Xu
- Pediatric Department, Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Xinqiong Wang
- Pediatric Department, Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yi Yu
- Pediatric Department, Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yi Yu
- Pediatric Department, Ruijin Hospital North, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Biao Gong
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Chundi Xu
- Pediatric Department, Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China; Pediatric Department, Ruijin Hospital North, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
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Faghih M, Gonzalez FG, Makary MA, Singh VK. Total pancreatectomy for recurrent acute and chronic pancreatitis: a critical review of patient selection criteria. Curr Opin Gastroenterol 2017; 33:330-338. [PMID: 28700371 PMCID: PMC5881167 DOI: 10.1097/mog.0000000000000390] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE OF REVIEW Critical review of the indications for total pancreatectomy and highlight limitations in current diagnostic criteria for chronic pancreatitis. RECENT FINDINGS The diagnosis of noncalcific chronic pancreatitis remains controversial because of an overreliance on nonspecific imaging and laboratories findings. Endoscopic ultrasound, s-magnetic resonance cholangiopancreatography, and/or endoscopic pancreatic function testing are often used to diagnose noncalcific chronic pancreatitis despite the fact that there is no gold standard for this condition. Abdominal pain is not specific for chronic pancreatitis and is more likely to be encountered in patients with functional gastrointestinal disorders based on the high incidence of these conditions. The duration of pain and opioid analgesic use results in central sensitization that adversely affects pain outcomes after total pancreatectomy. An alcoholic cause is associated with poorer pain outcomes after total pancreatectomy. SUMMARY The lack of a gold standard for noncalcific chronic pancreatitis limits the diagnostic accuracy of imaging and laboratory tests. The pain of chronic pancreatitis is nonspecific and is affected by duration, preoperative opioid use, and cause. These factors will need to be considered in the development of future selection criteria for this morbid surgery.
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Affiliation(s)
- Mahya Faghih
- Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | | | - Martin A. Makary
- Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | - Vikesh K. Singh
- Pancreatitis Center, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
- Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
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Zhao D, Xu Y, Li J, Fu S, Xiao F, Song X, Xie Z, Jiang M, He Y, Liu C, Wen Q, Yang X. Association between F508 deletion in CFTR and chronic pancreatitis risk. Dig Liver Dis 2017; 49:967-972. [PMID: 28780053 DOI: 10.1016/j.dld.2017.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 06/16/2017] [Accepted: 06/22/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND The cystic fibrosis transmembrane conductance regulator (CFTR) has been reported to influence individual susceptibility to chronic pancreatitis (CP), but the results of previous studies are controversial. AIMS We performed a study to demonstrate the relationship between CFTR and CP. METHODS We searched PubMed, Scopus, and Embase for studies of patients with CP. Seven studies from 1995 to 2016 were identified, and included 64,832 patients. Pooled prevalence and 95% confidence intervals (CIs) were calculated. RESULTS F508 deletion in CFTR was significantly positively associated with CP risk in the overall analysis (odds ratio [OR]=3.20, 95% CI: 2.30-4.44, I2=31.7%). In subgroup analysis stratified by ethnicity, F508 deletion was significantly associated with CP risk in Indian populations, using a fixed effects model (ORs=5.45, 95% CI: 2.52-11.79, I2=0.0%), and in non-Indian populations, using a random effects model (ORs=3.59, 95% CI: 1.73-7.48, I2=60.9%). At the same time, we found that Indians with F508 deletion had much higher CP prevalence than non-Indians. Interestingly, F508 deletion was also associated with CP and idiopathic CP risk in subgroup analysis stratified by aeitiology, using the fixed effects model. CONCLUSIONS Based on current evidence, F508 deletion is a risk factor for CP, and Indians with F508 deletion have much higher CP morbidity.
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Affiliation(s)
- Dong Zhao
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Yanzhen Xu
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China; Department of Pathophysiology, Guangxi Medical University, Nanning, Guangxi, China
| | - Jiatong Li
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China; Department of Pathophysiology, Guangxi Medical University, Nanning, Guangxi, China
| | - Shien Fu
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Feifan Xiao
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Xiaowei Song
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China; Department of Gastrointestinal and Gland Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Zhibin Xie
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China; Department of Urology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Min Jiang
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Yan He
- Department of Geriatric Cardiology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Chengwu Liu
- Department of Pathophysiology, Guangxi Medical University, Nanning, Guangxi, China
| | - Qiongxian Wen
- School of Nursing, The Second Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
| | - Xiaoli Yang
- Medical Scientific Research Center, Guangxi Medical University, Nanning, Guangxi, China.
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Bondoc AJ, Abu-El-Haija M, Nathan JD. Pediatric pancreas transplantation, including total pancreatectomy with islet autotransplantation. Semin Pediatr Surg 2017; 26:250-256. [PMID: 28964481 DOI: 10.1053/j.sempedsurg.2017.07.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Unlike other solid-organ transplants, whole pancreas transplantation in children is relatively rare, and it occurs more frequently in the context of multivisceral or composite organ transplantation. Because children only infrequently suffer severe sequelae of type 1 diabetes mellitus, pancreas transplantation is rarely indicated in the pediatric population. More commonly, pediatric pancreas transplant occurs in the setting of incapacitating acute recurrent or chronic pancreatitis, specifically islet autotransplantation after total pancreatectomy. In this clinical scenario, total pancreatectomy removes the nidus of chronic pain and debilitation, while autologous islet transplantation aims to preserve endocrine function. The published experiences with pediatric total pancreatectomy with islet autotransplantation (TPIAT) in children has demonstrated excellent outcomes including liberation from chronic opioid use, as well as improved mental and physical quality of life with good glycemic control. Given the complexity of the operation, risk of postoperative complication, and long-term physiologic changes, appropriate patient selection and comprehensive multidisciplinary care teams are critical to ensuring optimal outcomes.
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Affiliation(s)
- Alexander J Bondoc
- Division of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Mail Location 2023, Cincinnati, Ohio 45229.
| | - Maisam Abu-El-Haija
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Jaimie D Nathan
- Division of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Mail Location 2023, Cincinnati, Ohio 45229
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Jalaly NY, Moran RA, Fargahi F, Khashab MA, Kamal A, Lennon AM, Walsh C, Makary MA, Whitcomb DC, Yadav D, Cebotaru L, Singh VK. An Evaluation of Factors Associated With Pathogenic PRSS1, SPINK1, CTFR, and/or CTRC Genetic Variants in Patients With Idiopathic Pancreatitis. Am J Gastroenterol 2017; 112:1320-1329. [PMID: 28440306 DOI: 10.1038/ajg.2017.106] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 03/01/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVES We evaluated factors associated with pathogenic genetic variants in patients with idiopathic pancreatitis. METHODS Genetic testing (PRSS1, CFTR, SPINK1, and CTRC) was performed in all eligible patients with idiopathic pancreatitis between 2010 to 2015. Patients were classified into the following groups based on a review of medical records: (1) acute recurrent idiopathic pancreatitis (ARIP) with or without underlying chronic pancreatitis; (2) idiopathic chronic pancreatitis (ICP) without a history of ARP; (3) an unexplained first episode of acute pancreatitis (AP)<35 years of age; and (4) family history of pancreatitis. Logistic regression analysis was used to determine the factors associated with pathogenic genetic variants. RESULTS Among 197 ARIP and/or ICP patients evaluated from 2010 to 2015, 134 underwent genetic testing. A total of 88 pathogenic genetic variants were found in 64 (47.8%) patients. Pathogenic genetic variants were identified in 58, 63, and 27% of patients with ARIP, an unexplained first episode of AP <35 years of age, and ICP without ARP, respectively. ARIP (OR: 18.12; 95% CI: 2.16-151.87; P=0.008) and an unexplained first episode of AP<35 years of age (OR: 2.46; 95% CI: 1.18-5.15; P=0.017), but not ICP, were independently associated with pathogenic genetic variants in the adjusted analysis. CONCLUSIONS Pathogenic genetic variants are most likely to be identified in patients with ARIP and an unexplained first episode of AP<35 years of age. Genetic testing in these patient populations may delineate an etiology and prevent unnecessary diagnostic testing and procedures.
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Affiliation(s)
- Niloofar Y Jalaly
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Robert A Moran
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Pancreatitis Center, Division of Pancreaticobiliary Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Farshid Fargahi
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Mouen A Khashab
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ayesha Kamal
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anne Marie Lennon
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Christi Walsh
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Martin A Makary
- Pancreatitis Center, Division of Pancreaticobiliary Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - David C Whitcomb
- Cell Biology &Molecular Physiology, and Human Genetics, University of Pittsburgh/UPMC, Pittsburgh, Pennsylvania, USA
| | - Dhiraj Yadav
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh/UPMC, Pittsburgh, Pennsylvania, USA
| | - Liudmila Cebotaru
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Vikesh K Singh
- Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Pancreatitis Center, Division of Pancreaticobiliary Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Abstract
Genetic investigations have provided unique insight into the mechanism of chronic pancreatitis in humans and firmly established that uncontrolled trypsin activity is a central pathogenic factor. Mutations in the PRSS1, SPINK1, and CTRC genes promote increased activation of trypsinogen to trypsin by stimulation of autoactivation or by impairing protective trypsinogen degradation and/or trypsin inhibition. Here we review key genetic and biochemical features of the trypsin-dependent pathological pathway in chronic pancreatitis.
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Affiliation(s)
- Eszter Hegyi
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University Henry M. Goldman School of Dental Medicine, 72 East Concord Street, Evans-433, Boston, MA, 02118, USA
| | - Miklós Sahin-Tóth
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University Henry M. Goldman School of Dental Medicine, 72 East Concord Street, Evans-433, Boston, MA, 02118, USA.
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