1
|
Sousa P, Ministro P, Armuzzi A, Dignass A, Høivik ML, Barreiro-de Acosta M, Vavricka S, Saad-Hossne R, Kotze PG, Peyrin-Biroulet L, Magro F. Thiopurines: Use them or lose them? International survey on current and future use of thiopurines in inflammatory bowel disease. Dig Liver Dis 2021; 53:1571-1579. [PMID: 34187768 DOI: 10.1016/j.dld.2021.05.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/20/2021] [Accepted: 05/29/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS The role of thiopurines in therapeutic algorithms of Crohn's disease (CD) and Ulcerative colitis (UC) is being questioned. This work aimed to investigate current practice and future perspectives of Inflammatory Bowel Disease (IBD) physicians regarding the efficacy, safety, and role of precision medicine with thiopurines in IBD. METHODS A 29-questions web-based survey was developed and distributed to IBD physicians worldwide. RESULTS We collected the complete answers of 408 physicians from 50 countries. Most participants were experienced physicians in IBD; 26.0% met our definition of "IBD expert". Four physicians reported to not use thiopurines in clinical practice. Most respondents used thiopurines in monotherapy and in combination therapy, both in CD and UC. Respondents tended to consider thiopurines as drugs with a good safety profile, with the agreement of 61.5% of the overall cohort. A minority of physicians (~6%) considered that thiopurines will not be used in the future in IBD patients, while 57.8% believed that these drugs will still be used, in mono and combination therapy. CONCLUSION Despite the many emerging treatments in IBD, according to the beliefs of most physicians surveyed, thiopurines will still be an important part of the treatment algorithm of both CD and UC.
Collapse
Affiliation(s)
- Paula Sousa
- Department of Gastroenterology, Viseu Unit, Tondela-Viseu Hospital Centre, Viseu, Portugal
| | - Paula Ministro
- Department of Gastroenterology, Viseu Unit, Tondela-Viseu Hospital Centre, Viseu, Portugal
| | - Alessandro Armuzzi
- IBD Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Universita Cattolica, Rome, Italy
| | - Axel Dignass
- Department of Medicine I, Agaplesion Markus Hospital, Goethe-University, Frankfurt am Main, Germany
| | - Marte Lie Høivik
- Department of Gastroenterology, Oslo University Hospital, Oslo, Norway
| | - Manuel Barreiro-de Acosta
- IBD Unit, Department of Gastroenterology, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - Stephan Vavricka
- Division of Gastroenterology and Hepatology, University Hospital, Zürich, Switzerland
| | - Rogério Saad-Hossne
- Department of Internal Medicine, São Paulo State University (Unesp), Medical School, Botucatu, São Paulo, Brazil
| | - Paulo Gustavo Kotze
- Colorectal Surgery Unit, IBD outpatient clinics, Catholic University of Paraná (PUCPR), Curitiba, Brazil
| | - Laurent Peyrin-Biroulet
- Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
| | - Fernando Magro
- Department of Biomedicine, Unit of Pharmacology and Therapeutics, University of Porto, Porto, Portugal; Department of Gastroenterology, São João University Hospital, Porto, Portugal; MedInUP, Centre for Drug Discovery and Innovative Medicines, Porto, Portugal.
| |
Collapse
|
2
|
Thiopurines' Metabolites and Drug Toxicity: A Meta-Analysis. J Clin Med 2020; 9:jcm9072216. [PMID: 32668748 PMCID: PMC7408995 DOI: 10.3390/jcm9072216] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/06/2020] [Accepted: 07/09/2020] [Indexed: 12/13/2022] Open
Abstract
Many questions remain unanswered regarding therapeutic drug monitoring (TDM) utility with thiopurines. This study aims to establish a relationship between thiopurines' metabolites and drug toxicity. We performed a systematic review with inclusion of studies evaluating the relationship between thiopurines' metabolites and drug toxicity. Meta-analysis of mean difference (MD), correlations and odds ratio (OR) was performed. We identified 21,240 records, 72 of which were eligible for meta-analysis. Levels of 6-thioguanine nucleotides (6-TGN) were higher in patients with leukopenia (MD 127.06 pmol/8 × 108 RBC) and gastrointestinal intolerance (MD 201.46 pmol/8 × 108 RBC), and lower in patients with hepatotoxicity (MD -40.6 pmol × 108 RBC). We established a significant correlation between 6-TGN and leukocytes (r = -0.21), neutrophils (r = -0.24) and alanine aminotransferase levels (r = -0.24). OR for leukopenia in patients with elevated 6-TGN was 4.63 (95%CI 2.24; 9.57). An optimal cut-off of 135 pmol/8 × 108 RBC for leukopenia was calculated (sensitivity 75.4%; specificity 46.4%). 6-methylmercaptopurine ribonucleotides (6-MMPR) were significantly associated with hepatotoxicity (MD 3241.2 pmol/8 × 108 RBC; OR 4.28; 95%CI 3.20; 5.71). Levels of 6-MMPR measured in the first 8 weeks of treatment were associated with leukopenia. We conclude that TDM could be used to prevent thiopurines' toxicity. As optimal metabolites level may vary according to indication, physicians may adapt posology to decrease toxicity without compromising efficacy.
Collapse
|
3
|
Kreijne JE, de Vries AC, de Veer RC, Bouma G, Dijkstra G, Voskuil MD, West R, van Moorsel SAW, de Jong DJ, de Boer NK, van der Woude CJ. Limited added value of laboratory monitoring in thiopurine maintenance monotherapy in inflammatory bowel disease patients. Aliment Pharmacol Ther 2020; 51:1353-1364. [PMID: 32342997 DOI: 10.1111/apt.15734] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/13/2019] [Accepted: 03/25/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND To timely detect myelotoxicity and hepatotoxicity, laboratory monitoring at 3-month intervals is advised throughout thiopurine maintenance treatment for IBD. However, reported incidence rates of myelotoxicity and hepatotoxicity in maintenance treatment are low. AIM To assess incidence rates and clinical consequences of myelotoxicity and hepatotoxicity in thiopurine maintenance therapy after at least 1 year of thiopurine treatment. METHODS Retrospective analysis of therapy adjustment for laboratory toxicity in adult IBD patients after 12 consecutive months of azathioprine (AZA) or mercaptopurine monotherapy (ie baseline) between 2000 and 2016. Incidence rates of laboratory toxicity (ie myelotoxicity [leucocyte count <4.0 × 10e9/L, and/or platelet count <150 × 10e9/L] and/or hepatotoxicity (gamma-glutamyltransferase [GGT], alkaline phosphatase [AP], ALT and/or AST above ULN, excluding isolated increased AST/AP]) and associated diagnostic procedures and complications were assessed. RESULTS In total, 12,391 laboratory assessments were performed on 1132 patients (56% female, AZA 74%) during 3.3 years of median follow-up. Median monitoring frequency was 3.1 assessments/treatment year. Only 83/12,391 (0.7%) assessments resulted in therapy adjustment, dose reduction in 46 patients, cessation in 28 and allopurinol initiation in nine; risk of therapy adjustment was 1.9% per treatment year. Incidence rates of myelotoxicity were 7.1% (5.1% mild/1.8% moderate/0.1% severe) and hepatotoxicity 5.1% (3.8% mild/1.1% moderate/0.2% severe) per treatment year. Treatment-related complications with concurrent laboratory toxicity occurred in 12 patients (1.1%) and would not have been prevented by monitoring. CONCLUSION Severe laboratory toxicity is uncommon after 1 year of thiopurine monotherapy at 4-month monitoring intervals. Therapy adjustments are rare after detection of laboratory toxicity. After 1 year of thiopurine monotherapy, laboratory monitoring may be lowered to less than a 4-month interval.
Collapse
Affiliation(s)
- Joany E Kreijne
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Annemarie C de Vries
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Rozanne C de Veer
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Gerd Bouma
- Department of Gastroenterology and Hepatology, Amsterdam UMC, Vrije Universiteit Amsterdam, AG&M Research Institute, Amsterdam, The Netherlands
| | - Gerard Dijkstra
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Michiel D Voskuil
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Rachel West
- Department of Gastroenterology and Hepatology, Franciscus Gasthuis & Vlietland, Rotterdam, The Netherlands
| | - Sofia A W van Moorsel
- Department of Pharmacology, Zuyderland Medical Center, Heerlen-Sittard-Geleen, The Netherlands
| | - Dirk J de Jong
- Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nanne K de Boer
- Department of Gastroenterology and Hepatology, Amsterdam UMC, Vrije Universiteit Amsterdam, AG&M Research Institute, Amsterdam, The Netherlands
| | - C Janneke van der Woude
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | | |
Collapse
|
4
|
Abstract
Introduction: The management of patients with ulcerative colitis (UC) has evolved over the past few decades. While aminosalicylates remain the mainstay of induction and maintenance therapy in patients with mild-to-moderate UC, the advent of biologic agents and novel oral small molecules has substantively changed the treatment landscape for patients with moderate-to-severe disease and confounded the role of traditional immunomodulators (IMMs) such as thiopurines and methotrexate in the UC management algorithm.Areas covered: We summarize the mechanism of action of thiopurines and methotrexate, identify clinical parameters for their use, and appraise the evidence supporting the efficacy and safety of IMMs in UC as both monotherapy and in combination with other therapies, emphasizing on prospective, controlled data.Expert opinion: With the advent of several classes of highly effective treatments for UC, emergence of data demonstrating no benefit of IMMs over placebo, and concerns about the relative safety profile of long-term IMM exposure, we propose that the role of thiopurines or methotrexate be restricted to patients with milder disease failing to maintain corticosteroid-free remission on aminosalicylates alone or in combination therapy with tumor necrosis factor antagonists in patients with moderate-to-severe UC.
Collapse
Affiliation(s)
- Tarun Chhibba
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Christopher Ma
- Division of Gastroenterology & Hepatology, University of Calgary, Calgary, Alberta, Canada.,Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Robarts Clinical Trials, Inc., London, Ontario, Canada
| |
Collapse
|
5
|
Derijks LJJ, Wong DR, Hommes DW, van Bodegraven AA. Clinical Pharmacokinetic and Pharmacodynamic Considerations in the Treatment of Inflammatory Bowel Disease. Clin Pharmacokinet 2019; 57:1075-1106. [PMID: 29512050 DOI: 10.1007/s40262-018-0639-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
According to recent clinical consensus, pharmacotherapy of inflammatory bowel disease (IBD) is, or should be, personalized medicine. IBD treatment is complex, with highly different treatment classes and relatively few data on treatment strategy. Although thorough evidence-based international IBD guidelines currently exist, appropriate drug and dose choice remains challenging as many disease (disease type, location of disease, disease activity and course, extraintestinal manifestations, complications) and patient characteristics [(pharmaco-)genetic predisposition, response to previous medications, side-effect profile, necessary onset of response, convenience, concurrent therapy, adherence to (maintenance) therapy] are involved. Detailed pharmacological knowledge of the IBD drug arsenal is essential for choosing the right drug, in the right dose, in the right administration form, at the right time, for each individual patient. In this in-depth review, clinical pharmacodynamic and pharmacokinetic considerations are provided for tailoring treatment with the most common IBD drugs. Development (with consequent prospective validation) of easy-to-use treatment algorithms based on these considerations and new pharmacological data may facilitate optimal and effective IBD treatment, preferably corroborated by effectiveness and safety registries.
Collapse
Affiliation(s)
- Luc J J Derijks
- Department of Clinical Pharmacy and Pharmacology, Máxima Medical Center, PO Box 7777, 5500 MB, Veldhoven, The Netherlands.
| | - Dennis R Wong
- Department of Clinical Pharmacy, Pharmacology and Toxicology, Zuyderland Medical Center, Sittard-Geleen, The Netherlands
| | - Daniel W Hommes
- Center for Inflammatory Bowel Diseases, UCLA, Los Angeles, CA, USA
| | - Adriaan A van Bodegraven
- Department of Gastroenterology, Zuyderland Medical Center, Sittard-Geleen, The Netherlands
- Department of Gastroenterology, VU University Medical Center, Amsterdam, The Netherlands
| |
Collapse
|
6
|
Seinen ML, De Boer NK, van Bodegraven AA. Key insights from therapeutic drug monitoring in Crohn's disease patients. Expert Opin Drug Metab Toxicol 2019; 15:399-406. [PMID: 30892105 DOI: 10.1080/17425255.2019.1597054] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION The incidence and prevalence of Crohn's disease are increasing causing a significant disease burden. Therapeutic drug monitoring (TDM) is advocated as a promising tool for personalized or individual-tailored therapy strategies and has been welcomed as a new means to improve current therapy strategies. Nevertheless, pharmacokinetic-based TDM has limitations, and straightforward target concentrations for most therapies are lacking. Areas covered: In the following concise review of literature, key insights of TDM in thiopurine, methotrexate, anti-TNF, vedolizumab and ustekinumab therapy for Crohn's disease are being described. Expert opinion: Therapeutic drug monitoring may, up till now, be helpful to adjust thiopurine and infliximab therapy, primarily in a reactive setting, in case of inefficacy and of occurrence of adverse event. With this restricted application, the goal of individualized therapy based on TDM has not yet been achieved.
Collapse
Affiliation(s)
- Margien L Seinen
- a Department of Gastroenterology and Hepatology, Amsterdam UMC , Vrije Universiteit Amsterdam , Amsterdam , The Netherlands
| | - Nanne K De Boer
- b Department of Gastroenterology and Hepatology, Amsterdam Gastroenterology and Metabolism Research Institute, Amsterdam UMC , Vrije Universiteit Amsterdam , Amsterdam , The Netherlands
| | - Adriaan A van Bodegraven
- a Department of Gastroenterology and Hepatology, Amsterdam UMC , Vrije Universiteit Amsterdam , Amsterdam , The Netherlands.,c Department of Gastroenterology, Geriatrics, Internal and Intensive Care Medicine (Co-MIK) , Zuyderland Medical Center , Heerlen-Sittard-Geleen , The Netherlands
| |
Collapse
|
7
|
Schaalan MF, Ramadan BK, H. Abd Elwahab A. Ameliorative effect of taurine-chloramine in azathioprine-induced testicular damage; a deeper insight into the mechanism of protection. Altern Ther Health Med 2018; 18:255. [PMID: 30223827 PMCID: PMC6142322 DOI: 10.1186/s12906-018-2272-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 06/26/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND The male reproductive system is a sensitive and intricate process that can be distressed following exposure to various toxicants. Therapeutic drugs, especially chemotherapeutics, can also adversely affect male fertility by instigating hormonal changes leading to testicular cells injury. Azathioprine (AZA) is an effective anticancer drug, but some cases of testicular toxicity have been reported. The aim of this work was to investigate the protective effects of taurine chloramine (TAU-Cl), a reported antioxidant and antiinflammtory peptide, against AZA-induced testicular dysfunction in male rats and ascertain the contributing mechanisms. METHODS Forty male rats were allocated into four equal groups; (i) normal control rats, (ii) TAU-Cl group (100 mg/kg b.w/day for 10 weeks, (iii) AZA group (5 mg/day for 4 weeks); (iv) TAU-Cl/AZA group. RESULTS AZA caused increased DNA damage in the testes, and alterations in sex hormones and sperm quality, including sperm count, viability, and motility. Moreover, testicular tissue from the AZA-treated group had increased levels of oxidative stress indicator, MDA, and decreased activity of the antioxidant enzymes as superoxide dismutase (SOD), reduced glutathione (GSH) and catalase (CAT) levels. These deleterious events were accompanied by upregulated levels of the pro-inflammatory cytokines, tumor necrosis factor-alpha (TNF-α), and protein expression of iNOS and NFκB-p65, interleukin-1beta (IL-1β), and proapoptotic marker; caspase-9, together with decreased Bcl-2, NrF2 and hemeoxygenase (HO-1) expression. In contrast, TAU-Cl pretreatment significantly abrogated these toxic effects which were confirmed histologically. CONCLUSION Pretreatment with TAU-Cl exerts a protective effect against AZA-induced male reproductive testicular atrophy. This finding could open new avenues for the use of TAU-Cl as a complementary approach to chemotherapy supportive care.
Collapse
|
8
|
Clinical Value of Mercaptopurine After Failing Azathioprine Therapy in Patients With Inflammatory Bowel Disease. Ther Drug Monit 2017; 38:463-70. [PMID: 27158876 DOI: 10.1097/ftd.0000000000000312] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Thiopurines have been widely accepted as immunosuppressive therapy in inflammatory bowel disease. However, many patients have to discontinue thiopurines due to intolerance or ineffectiveness. A therapeutically beneficial effect of switching from azathioprine (AZA) to mercaptopurine (MP) after developing adverse events (AEs) has been reported. The authors assessed the clinical value of MP therapy after AZA discontinuation due to intolerance and, secondary, due to ineffectiveness. METHODS In this retrospective single-center study, the authors analyzed data from patients in whom AZA therapy had failed and who were subsequently treated with MP. RESULTS Thirty-eight patients initiated MP therapy after intolerance to AZA. Intolerance reoccurred in 22 (58%) patients and the remaining 16 (42%) tolerated MP. In 18 out of 48 patients (38%), the AEs that led to discontinuation of MP were similar to those of AZA. A longer duration of prior AZA use was more common in patients who were subsequently tolerant for MP (5.3 versus 1.2 months; P = 0.04). Twenty-two patients discontinued AZA due to ineffectiveness. Eight (36%) patients had clinical benefit from a switch to MP. Six out of these 8 (75%) patients used allopurinol alongside MP, due to ineffectiveness based on a skewed thiopurine metabolism. Patients were more likely to have clinical benefit if the interval between both thiopurines was longer (4.4 versus 0.01 months; P < 0.05). CONCLUSIONS The authors showed that a noteworthy number of patients benefitted therapeutically from a switch from AZA to MP when failing due to intolerance or ineffectiveness; however, the percentage was lower than previously reported in literature.
Collapse
|
9
|
Bermejo San José F, Algaba A, López Durán S, Guerra I, Aicart M, Hernández-Tejero M, Garrido E, de Lucas M, Bonillo D, López Sanromán A. Mercaptopurine and inflammatory bowel disease: the other thiopurine. REVISTA ESPANOLA DE ENFERMEDADES DIGESTIVAS 2017; 109:10-16. [PMID: 27809554 DOI: 10.17235/reed.2016.4546/2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Data about use and effectiveness of mercaptopurine in inflammatory bowel disease are relatively limited. AIMS To assess the possible therapeutic indications, efficacy and safety of mercaptopurine as an alternative to azathioprine in inflammatory bowel disease. METHODS Retrospective observational study in patients treated with mercaptopurine in a total cohort of 1,574 patients with inflammatory bowel disease. RESULTS One hundred and fifty-two patients received mercaptopurine, 15.7% of these patients as an initial thiopurine, 5.3% after azathioprine failure, and 79% after azathioprine intolerance. In 52.6% of patients (n = 80), adverse effects of mercaptopurine occurred, resulting in withdrawal in 49 of them. Mercaptopurine was effective in 39% of cases (95% CI 31-48%). In the remaining patients, failure was due mainly to withdrawal due to side effects (55.1%) and therapeutic step-up (33.7%). The average total time of mercaptopurine exposure was 36 months (IQR: 2-60). Myelotoxicity with mercaptopurine was more common in patients with intermediate TPMT activity than in those with normal activity (p = 0.046). CONCLUSIONS In our setting, mercaptopurine is primarily used as a rescue therapy in patients with azathioprine adverse effects. This could explain its modest efficacy and the high rate of adverse effects. However, this drug is still an alternative in this group of patients, before a therapeutic step-up to biologics is considered.
Collapse
Affiliation(s)
| | | | - Sergio López Durán
- Servicio de Gastroenterología, Hospital Universitario Ramón y Cajal, España
| | - Iván Guerra
- Digestivo, Hospital Universitario de Fuenlabrada
| | - Marta Aicart
- Gastroenterologia, Hospital Universitario Ramón y Cajal
| | | | - Elena Garrido
- Gastroenterología, Hospital Universitario Ramón y Cajal
| | | | | | | |
Collapse
|
10
|
Vande Casteele N, Herfarth H, Katz J, Falck-Ytter Y, Singh S. American Gastroenterological Association Institute Technical Review on the Role of Therapeutic Drug Monitoring in the Management of Inflammatory Bowel Diseases. Gastroenterology 2017; 153:835-857.e6. [PMID: 28774547 DOI: 10.1053/j.gastro.2017.07.031] [Citation(s) in RCA: 205] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Therapeutic drug monitoring (TDM), which involves measurement of drug or active metabolite levels and anti-drug antibodies, is a promising strategy that can be used to optimize inflammatory bowel disease therapeutics. It is based on the premise that there is a relationship between drug exposure and outcomes, and that considerable inter-individual variability exists in how patients metabolize the drug (pharmacokinetics) and the magnitude and duration of response to therapy (pharmacodynamics). Therefore, the American Gastroenterological Association has prioritized clinical guidelines on the role of TDM in the management of inflammatory bowel disease. To inform these clinical guidelines, this technical review was developed in accordance with the GRADE (Grading of Recommendations Assessment, Development, and Evaluation) framework for interventional and prognostic studies, and focused on the application of TDM for biologic therapy, specifically anti-tumor necrosis factor-α agents, and for thiopurines. Focused questions address the benefits and risks of a strategy of reactive TDM (in patients with active inflammatory bowel disease) to guide treatment changes compared with empiric treatment changes, and the benefits and risks of a strategy of routine proactive TDM (during routine clinical care in patients with quiescent disease) compared with no routine TDM. Additionally, the review addresses the benefits and risks of routine measurement of thiopurine methyltransferase enzyme activity or genotype before starting thiopurine therapy compared with empiric weight-based dosing and explores the performance of different trough drug concentrations for anti-tumor necrosis factor agents and thiopurines to inform clinical decision making when applying TDM in a reactive setting. Due to a paucity of data, this review does not address the role of TDM for more recently approved biologic agents, such as vedolizumab or ustekinumab.
Collapse
Affiliation(s)
- Niels Vande Casteele
- Division of Gastroenterology, University of California, San Diego, La Jolla, California
| | - Hans Herfarth
- Division of Gastroenterology and Hepatology, University of North Carolina, Chapel Hill, North Carolina
| | - Jeffry Katz
- Division of Gastroenterology and Liver Disease, Case Western Reserve University, Cleveland, Ohio
| | - Yngve Falck-Ytter
- Division of Gastroenterology and Liver Disease, Case Western Reserve University, Cleveland, Ohio; VA Medical Center, Cleveland, Ohio
| | - Siddharth Singh
- Division of Gastroenterology, University of California, San Diego, La Jolla, California
| |
Collapse
|
11
|
Feuerstein JD, Nguyen GC, Kupfer SS, Falck-Ytter Y, Singh S, Hirano I, Nguyen GC, Rubenstein JH, Smalley WE, Stollman N, Sultan S, Vege SS, Wani SB, Weinberg D, Yang YX. American Gastroenterological Association Institute Guideline on Therapeutic Drug Monitoring in Inflammatory Bowel Disease. Gastroenterology 2017; 153:827-834. [PMID: 28780013 DOI: 10.1053/j.gastro.2017.07.032] [Citation(s) in RCA: 389] [Impact Index Per Article: 55.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Joseph D Feuerstein
- Division of Gastroenterology and Center for Inflammatory Bowel Disease, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Geoffrey C Nguyen
- Mount Sinai Hospital Centre for Inflammatory Bowel Disease, University of Toronto, Toronto, Ontario, Canada
| | - Sonia S Kupfer
- Division of Gastroenterology, The University of Chicago, Chicago, Illinois
| | - Yngve Falck-Ytter
- Division of Gastroenterology and Liver Disease, Case Western Reserve University and Veterans Affairs Medical Center, Cleveland, Ohio
| | - Siddharth Singh
- Division of Gastroenterology, University of California, San Diego, La Jolla, California
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Gionchetti P, Rizzello F, Annese V, Armuzzi A, Biancone L, Castiglione F, Comberlato M, Cottone M, Danese S, Daperno M, D'Incà R, Fries W, Kohn A, Orlando A, Papi C, Vecchi M, Ardizzone S. Use of corticosteroids and immunosuppressive drugs in inflammatory bowel disease: Clinical practice guidelines of the Italian Group for the Study of Inflammatory Bowel Disease. Dig Liver Dis 2017; 49:604-617. [PMID: 28254463 DOI: 10.1016/j.dld.2017.01.161] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/15/2017] [Accepted: 01/17/2017] [Indexed: 02/07/2023]
Abstract
The two main forms of intestinal bowel disease, namely ulcerative colitis and Crohn's disease, are not curable but can be controlled by various medical therapies. The Italian Group for the Study of Inflammatory Bowel Disease (IG-IBD) has prepared clinical practice guidelines to help physicians prescribe corticosteroids and immunosuppressive drugs for these patients. The guidelines consider therapies that induce remission in patients with active disease as well as treatment regimens that maintain remission. These guidelines complement already existing guidelines from IG-IBD on the use of biological drugs in patients with inflammatory bowel diseases.
Collapse
Affiliation(s)
- Paolo Gionchetti
- Department of Medical and Surgical Sciences, IBD Unit, University of Bologna, Bologna, Italy.
| | - Fernando Rizzello
- Department of Medical and Surgical Sciences, IBD Unit, University of Bologna, Bologna, Italy
| | - Vito Annese
- AOU Gastroenterology, Careggi University Hospital, Florence, Italy
| | - Alessandro Armuzzi
- IBD Unit Complesso Integrato Columbus-Gemelli Hospital Catholic University Foundation, Rome, Italy
| | - Livia Biancone
- University "Tor Vergata", Department of Systems Medicine, Rome, Italy
| | | | | | - Mario Cottone
- Department of Medicine, Pneumology and Nutrition Clinic, V. Cervello Hospital, Ospedali Riuniti Villa Sofia-Cervello University of Palermo, Palermo, Italy
| | - Silvio Danese
- IBD Center, Humanitas Clinical and Research Centre, Milan, Italy
| | - Marco Daperno
- Gastroenterology Unit, A.O. Ordine Mauriziano Hospital, Turin, Italy
| | - Renata D'Incà
- Department of Surgical and Gastroenterological Sciences, University of Padua, Padua, Italy
| | - Walter Fries
- Clinical Unit for Chronic Bowel Disorders, Department of Internal Medicine, IBD Unit Messina, University of Messina, Messina, Italy
| | - Anna Kohn
- Department of Gastroenterology, San Camillo-Forlanini Hospital, Rome, Italy
| | - Ambrogio Orlando
- Department of Medicine, Pneumology and Nutrition Clinic, V. Cervello Hospital, Ospedali Riuniti Villa Sofia-Cervello University of Palermo, Palermo, Italy
| | - Claudio Papi
- Gastroenterology Unit, San Filippo Neri Hospital, Rome, Italy
| | - Maurizio Vecchi
- Gastroenterology and Gastrointestinal Endoscopy Unit, IRCCS San Donato Hospital, San Donato Milanese, Italy
| | - Sandro Ardizzone
- Gastroenterology and Digestive Endoscopy, ASST Fatebenefratelli Sacco, University of Milan, Milan, Italy
| | | |
Collapse
|
13
|
Combination treatment with 6-mercaptopurine and allopurinol in HepG2 and HEK293 cells - Effects on gene expression levels and thiopurine metabolism. PLoS One 2017; 12:e0173825. [PMID: 28278299 PMCID: PMC5344510 DOI: 10.1371/journal.pone.0173825] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 02/26/2017] [Indexed: 12/13/2022] Open
Abstract
Combination treatment with low-dose thiopurine and allopurinol (AP) has successfully been used in patients with inflammatory bowel disease with a so called skewed thiopurine metabolite profile. In red blood cells in vivo, it reduces the concentration of methylated metabolites and increases the concentration of the phosphorylated ones, which is associated with improved therapeutic efficacy. This study aimed to investigate the largely unknown mechanism of AP on thiopurine metabolism in cells with an active thiopurine metabolic pathway using HepG2 and HEK293 cells. Cells were treated with 6-mercaptopurine (6MP) and AP or its metabolite oxypurinol. The expression of genes known to be associated with thiopurine metabolism, and the concentration of thiopurine metabolites were analyzed. Gene expression levels were only affected by AP in the presence of 6MP. The addition of AP to 6MP affected the expression of in total 19 genes in the two cell lines. In both cell lines the expression of the transporter SLC29A2 was reduced by the combined treatment. Six regulated genes in HepG2 cells and 8 regulated genes in HEK293 cells were connected to networks with 18 and 35 genes, respectively, present at known susceptibility loci for inflammatory bowel disease, when analyzed using a protein-protein interaction database. The genes identified as regulated as well as the disease associated interacting genes represent new candidates for further investigation in the context of combination therapy with thiopurines and AP. However, no differences in absolute metabolite concentrations were observed between 6MP+AP or 6MP+oxypurinol vs. 6MP alone in either of the two cell lines. In conclusion; the effect of AP on gene expression levels requires the presence of 6MP, at least in vitro. Previously described AP-effects on metabolite concentrations observed in red blood cells in vivo could not be reproduced in our cell lines in vitro. AP’s effects in relation to thiopurine metabolism are complex. The network-identified susceptibility genes represented biological processes mainly associated with purine nucleotide biosynthetic processes, lymphocyte proliferation, NF-KB activation, JAK-STAT signaling, and apoptotic signaling at oxidative stress.
Collapse
|
14
|
Wong DR, Coenen MJH, Derijks LJJ, Vermeulen SH, van Marrewijk CJ, Klungel OH, Scheffer H, Franke B, Guchelaar HJ, de Jong DJ, Engels LGJB, Verbeek ALM, Hooymans PM. Early prediction of thiopurine-induced hepatotoxicity in inflammatory bowel disease. Aliment Pharmacol Ther 2017; 45:391-402. [PMID: 27943397 DOI: 10.1111/apt.13879] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 08/20/2016] [Accepted: 11/05/2016] [Indexed: 12/16/2022]
Abstract
BACKGROUND Hepatotoxicity, gastrointestinal complaints and general malaise are common limiting adverse reactions of azathioprine and mercaptopurine in IBD patients, often related to high steady-state 6-methylmercaptopurine ribonucleotide (6-MMPR) metabolite concentrations. AIM To determine the predictive value of 6-MMPR concentrations 1 week after treatment initiation (T1) for the development of these adverse reactions, especially hepatotoxicity, during the first 20 weeks of treatment. METHODS The cohort study consisted of the first 270 IBD patients starting thiopurine treatment as part of the Dutch randomised-controlled trial evaluating pre-treatment thiopurine S-methyltransferase genotype testing (ClinicalTrials.gov NCT00521950). Blood samples for metabolite assessment were collected at T1. Hepatotoxicity was defined by alanine aminotransaminase elevations >2 times the upper normal limit or a ratio of alanine aminotransaminase/alkaline phosphatase ≥5. RESULTS Forty-seven patients (17%) presented hepatotoxicity during the first 20 weeks of thiopurine treatment. A T1 6-MMPR threshold of 3615 pmol/8 × 108 erythrocytes was defined. Analysis of patients on stable thiopurine dose (n = 174) showed that those exceeding the 6-MMPR threshold were at increased risk of hepatotoxicity: OR = 3.8 (95% CI: 1.8-8.0). Age, male gender and BMI were significant determinants. A predictive algorithm was developed based on these determinants and the 6-MMPR threshold to assess hepatotoxicity risk [AUC = 0.83 (95% CI: 0.75-0.91)]. 6-MMPR concentrations above the threshold also correlated with gastrointestinal complaints: OR = 2.4 (95% CI: 1.4-4.3), and general malaise: OR = 2.0 (95% CI: 1.1-3.7). CONCLUSIONS In more than 80% of patients, thiopurine-induced hepatotoxicity could be explained by elevated T1 6-MMPR concentrations and the independent risk factors age, gender and BMI, allowing personalised thiopurine treatment in IBD to prevent early failure.
Collapse
|
15
|
Coskun M, Steenholdt C, de Boer NK, Nielsen OH. Pharmacology and Optimization of Thiopurines and Methotrexate in Inflammatory Bowel Disease. Clin Pharmacokinet 2016; 55:257-74. [PMID: 26255287 DOI: 10.1007/s40262-015-0316-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Improving the efficacy and reducing the toxicity of thiopurines and methotrexate (MTX) have been areas of intense basic and clinical research. An increased knowledge on pharmacodynamics and pharmacokinetics of these immunomodulators has optimized treatment strategies in inflammatory bowel disease (IBD). This review focuses on the metabolism and mode of action of thiopurines and MTX, and provides an updated overview of individualized treatment strategies in which efficacy in IBD can be increased without compromising safety. The patient-based monitoring instruments adapted into clinical practice include pretreatment thiopurine S-methyltransferase testing, thiopurine metabolite monitoring, and blood count measurements that may help guiding the dosage to improve clinical outcome. Other approaches for optimizing thiopurine therapy in IBD include combination therapy with allopurinol, 5-aminosalicylates, and/or biologics. Similar strategies are yet to be proven effective in improving the outcome of MTX therapy. Important challenges for the management of IBD in the future relate to individualized dosing of immunomodulators for maximal efficacy with minimal risk of side effects. As low-cost conventional immunomodulators still remain a mainstay in pharmacotherapy of IBD, more research remains warranted, especially to substantiate these tailored management strategies in controlled clinical trials.
Collapse
Affiliation(s)
- Mehmet Coskun
- Department of Gastroenterology, Herlev Hospital, University of Copenhagen, Herlev, Denmark. .,Department of Biology and Biotech Research and Innovation Centre (BRIC), The Bioinformatics Centre, University of Copenhagen, Copenhagen, Denmark.
| | - Casper Steenholdt
- Department of Gastroenterology, Herlev Hospital, University of Copenhagen, Herlev, Denmark
| | - Nanne K de Boer
- Department of Gastroenterology and Hepatology, VU University Medical Center, Amsterdam, The Netherlands
| | - Ole Haagen Nielsen
- Department of Gastroenterology, Herlev Hospital, University of Copenhagen, Herlev, Denmark
| |
Collapse
|
16
|
Meijer B, Mulder CJJ, Peters GJ, van Bodegraven AA, de Boer NKH. Efficacy of thioguanine treatment in inflammatory bowel disease: A systematic review. World J Gastroenterol 2016; 22:9012-9021. [PMID: 27833392 PMCID: PMC5083806 DOI: 10.3748/wjg.v22.i40.9012] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 07/20/2016] [Accepted: 08/10/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To critically assess the available literature regarding the efficacy of thioguanine treatment in inflammatory bowel disease (IBD) patients, irrespective of the (hepato-) toxicity profile.
METHODS A systematic literature search of the MEDLINE database using PubMed was performed using the keywords “thioguanine”, “6-TG”, “thioguanine”, “inflammatory bowel disease”, “IBD”, “Crohn’s disease”, “Ulcerative colitis” and “effectiveness” in order to identify relevant articles published in English starting from 2000. Reference lists of the included articles were cross-checked for missing articles. Reviewed manuscripts concerning the effectiveness of thioguanine treatment in IBD were reviewed by the authors and the data were extracted. Data were subsequently analyzed with descriptive statistics. Due to the lack of standardized outcomes, a formal meta-analysis was not performed.
RESULTS A total of 11 applicable studies were found that involved the effectiveness of thioguanine therapy in IBD. Eight studies were conducted in a prospective manner, in the remaining three studies, data was collected retrospectively. In total, 353 IBD-patients (225 patients with Crohn’s disease, 119 with ulcerative colitis and nine with unclassified IBD) with prior azathioprine/mercaptopurine resistance and/or intolerance (n = 321) or de novo thioguanine administration (n = 32) were included for analysis, of which 228 (65%) had clinical improvement on thioguanine therapy, based on standard IBD questionnaires, biochemical parameters or global physician assessments. Short-term results were based on 268 treatment years (median follow-up 9 mo, range 3-22 mo) with a median daily dose of 20 mg (range 10-80 mg). Discontinuation, mostly due to adverse events, was reported in 72 patients (20%).
CONCLUSION The efficacy of thioguanine therapy in IBD patients intolerant to conventional thiopurine therapy is observed in 65%, with short term adverse events in 20% of patients.
Collapse
|
17
|
Long-term Safety and Efficacy of Low-dose Azathioprine and Allopurinol Cotherapy in Inflammatory Bowel Disease: A Large Observational Study. Inflamm Bowel Dis 2016; 22:1639-46. [PMID: 27271488 DOI: 10.1097/mib.0000000000000827] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Low-dose azathioprine with allopurinol (LDAA) has been proposed as a potent therapy in inflammatory bowel disease (IBD) with the benefit of overcoming side effects regularly associated with thiopurine monotherapy and poor responses. Concerns regarding safety remain, while a layer of complexity has been added by the trend toward treatment directed by red cell thioguanine nucleotide (TGN) profiling. We report on the clinical efficacy and safety of LDAA use in IBD undirected by metabolite profiling. METHODS Observational study of clinical practice from a single IBD center. Patient outcomes were defined clinically based on established activity scores and corticosteroid withdrawal. Red cell TGN was monitored only for suspected nonadherence. RESULTS Overall, 113/164 (69%) patients with Crohn's disease and 83/136 (61%) patients with ulcerative/unclassified colitis had a clinical response by the end of follow-up (median 19 months), while 85 (52%) patients with Crohn's disease and 74 (54%) patients with ulcerative/unclassified colitis were in clinical remission. Clinical response was seen in 45/57 (79%) patients with Crohn's disease and 34/53 (64%) patients with ulcerative/unclassified colitis who were thiopurine naive, had active IBD, and received LDAA as the first line immunomodulator, while in 35 (61%) and 28 (53%), respectively, remission was achieved. LDAA was stopped in 20/300 (7%) patients because of side effects, all of which resolved on drug cessation. CONCLUSIONS This is the largest cohort supporting the favorable safety profile and high efficacy of LDAA in IBD. It presents 2 advances in therapy: prescribing LDAA for thiopurine-naive patients, and bypassing TGN monitoring in favor of clinical monitoring (blood counts, etc.), which will make it more accessible for clinics without access to TGN assays.
Collapse
|
18
|
Qiu Y, Chen BL, Mao R, Zhang SH, He Y, Zeng ZR, Chen MH. Endoscopy Assessment at 1-Year Identifies Long-Term Responders to Thiopurines Maintenance Therapy in Patients With Crohn's Disease. Medicine (Baltimore) 2015; 94:e1204. [PMID: 26252278 PMCID: PMC4616585 DOI: 10.1097/md.0000000000001204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
When treating Crohn disease (CD) with thiopurines, achievement of an objective response is essential. However, the minimal degree of mucosal improvement required to alter disease outcomes of CD is unknown.To determine the endoscopic responses of thiopurine monotherapy and to determine the minimal degree of mucosal improvement required to alter disease outcomes of CD.One hundred thirty CD patients who had evaluable ileocolonoscopy with evident of mucosal ulceration at baseline were included. The endpoints were endoscopic responses at the 2 follow-up endoscopies performed at 12 months (M12) and 36 month (M36) from the initiation of thiopurines.At M12, mucosal healing (MH) and a positive endoscopic response (PR) were documented in 38% and 46% of patients, respectively. At the second follow-up, merely a further 14% (13/93) of patients on monotherapy had a PR and a total of 46% (43/93) presented with MH. In a Cox regression model, both a PR (P < 0.02) and MH (P < 0.001) at M12 were associated with response at M36 in patients continuing thiopurine treatment. MH at M12 was associated with long-term disease outcomes of CD at M36, with an area under the Receiver Operator Characteristic curve of 0.54 for predicting clinical remission, 0.69 for hsCRP normalization, 0.69 for MH, and 0.74 for PR, respectively. A PR at M12, defined as a decrease in endoscopic activity score by ≥2 points from baseline, yielded similar results.Endoscopy at M12 can help to identify responders to thiopurine monotherapy in active CD. A PR could represent the minimal clinically important improvement in endoscopic disease activity.
Collapse
Affiliation(s)
- Yun Qiu
- From the Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
19
|
Gallego-Gutiérrez S, Navas-López VM, Kolorz M, Bartosova L, Lukac K, Luque-Pérez S, Núñez-Caro L, García-Galán P, Fernández-Crehuet FG, Blasco-Alonso J, Serrano-Nieto MJ, Sierra-Salinas C. Successful Mercaptopurine Usage despite Azathioprine-Induced Pancreatitis in Paediatric Crohn's Disease. J Crohns Colitis 2015; 9:676-9. [PMID: 25968582 DOI: 10.1093/ecco-jcc/jjv086] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 05/07/2015] [Indexed: 01/15/2023]
Abstract
BACKGROUND Azathioprine [AZA] and mercaptopurine [MP] are recommended for maintenance of steroid-free remission in children with Crohn`s disease [CD]. Azathioprine-induced pancreatitis, an idiosyncratic and major side effect, has been considered as an absolute contraindication for the use of a second thiopurine in IBD patients. MATERIALS AND METHODS We describe two children with CD in whom MP were successfully trialled after a confirmed azathioprine-induced pancreatitis, being well tolerated in both cases. RESULTS Two boys [13 and 10 years old] started exclusive enteral nutrition after diagnosis of moderate (Pediatric Crohn's Disease Activity Index [wPCDAI] = 45) and mild [wPCDAI = 35] CD. Both developed an acute mild to moderate pancreatitis after 2 and 3 weeks, respectively, of AZA treatment but recovered fully in hospital after AZA withdrawal. They started on MP treatment without any adverse effect. They were tested for the presence of polymorphisms 238G>C, 460G>A, and 719A>G in the TPMT gene and 94C>A and 21>C in the ITPase. Both patients were wild-type for all tested polymorphisms. CONCLUSIONS Azathioprine-induced acute pancreatitis should not be considered as an absolute contraindication for the use of MP. Further investigation is required to create a better understanding of the mechanism underlying the adverse events and to allow more possibilities for personalised therapy.
Collapse
Affiliation(s)
- Silvia Gallego-Gutiérrez
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Víctor Manuel Navas-López
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain Biomedical Institute of Malaga [IBIMA], Hopsital General de Málaga, Málaga, Spain
| | - Michal Kolorz
- Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, UVPS Brno, Czech Republic Department of Clinical Pharmacy, Hospital Pharmacy, Faculty Hospital, Brno, Bohunice, Czech Republic
| | - Ladislava Bartosova
- Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, UVPS Brno, Czech Republic
| | - Katerina Lukac
- Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, UVPS Brno, Czech Republic
| | - Silvia Luque-Pérez
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Leticia Núñez-Caro
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Paloma García-Galán
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain
| | | | - Javier Blasco-Alonso
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain Biomedical Institute of Malaga [IBIMA], Hopsital General de Málaga, Málaga, Spain
| | - María Juliana Serrano-Nieto
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Carlos Sierra-Salinas
- Pediatric Gastroenterology and Nutrition Unit, UGC de Pediatría, Hospital Regional Universitario de Málaga, Málaga, Spain Biomedical Institute of Malaga [IBIMA], Hopsital General de Málaga, Málaga, Spain
| |
Collapse
|
20
|
Roberts RL, Barclay ML. Update on thiopurine pharmacogenetics in inflammatory bowel disease. Pharmacogenomics 2015; 16:891-903. [PMID: 26067482 DOI: 10.2217/pgs.15.29] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Azathioprine and 6-mercaptopurine remain pivotal therapies for the maintenance of disease remission in patients with Crohn's disease and ulcerative colitis. While thiopurine S-methyltransferase deficiency was the first pharmacogenetic phenomenon to be recognized to influence thiopurine toxicity and reliably predict leukopenia, it does not predict other adverse effects, nor does it explain most cases of thiopurine resistance. In recent years, a number of other genetic polymorphisms have received increasing attention in the literature. In particular, SNPs in NUDT15 and in the class II HLA locus have been shown to predict thiopurine-related leukopenia and pancreatitis. The aim of this review is to provide a concise update of genetic variability which may influence patient response to azathioprine and 6-mercaptopurine.
Collapse
Affiliation(s)
- Rebecca L Roberts
- Department of Surgical Sciences, Dunedin School of Medicine, PO Box 56, Dunedin, New Zealand
| | - Murray L Barclay
- Department of Medicine, University of Otago Christchurch, PO Box 4345, Christchurch, New Zealand.,Department of Gastroenterology, Christchurch Hospital, Private Bag 4710, Christchurch, New Zealand
| |
Collapse
|
21
|
Determination of Inosine Triphosphate Pyrophosphatase in Red Blood Cells Using HPLC. Ther Drug Monit 2014; 36:689-91. [DOI: 10.1097/ftd.0000000000000075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
22
|
Konidari A, Matary WE. Use of thiopurines in inflammatory bowel disease: Safety issues. World J Gastrointest Pharmacol Ther 2014; 5:63-76. [PMID: 24868487 PMCID: PMC4023326 DOI: 10.4292/wjgpt.v5.i2.63] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 02/19/2014] [Indexed: 02/06/2023] Open
Abstract
Thiopurines are widely used for maintenance treatment of inflammatory bowel disease. Inter-individual variability in clinical response to thiopurines may be attributed to several factors including genetic polymorphisms, severity and chronicity of disease, comorbidities, duration of administration, compliance issues and use of concomitant medication, environmental factors and clinician and patient preferences. The purpose of this review is to summarise the current evidence on thiopurine safety and toxicity, to describe adverse drug events and emphasise the significance of drug interactions, and to discuss the relative safety of thiopurine use in adults, elderly patients, children and pregnant women. Thiopurines are safe to use and well tolerated, however dose adjustment or discontinuation of treatment must be considered in cases of non-response, poor compliance or toxicity. Drug safety, clinical response to treatment and short to long term risks and benefits must be balanced throughout treatment duration for different categories of patients. Treatment should be individualised and stratified according to patient requirements. Enzymatic testing prior to treatment commencement is advised. Surveillance with regular clinic follow-up and monitoring of laboratory markers is important. Data on long term efficacy, safety of thiopurine use and interaction with other disease modifying drugs are lacking, especially in paediatric inflammatory bowel disease. High quality, collaborative clinical research is required so as to inform clinical practice in the future.
Collapse
|
23
|
Relationship between azathioprine dosage and thiopurine metabolites in pediatric IBD patients: identification of covariables using multilevel analysis. Ther Drug Monit 2013; 35:251-7. [PMID: 23503453 DOI: 10.1097/ftd.0b013e318282c3a6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Previous studies have reported no or only a very poor correlation between 6-methylmercaptopurine/6-thioguanine nucleotide (6-MeMPN/6-TGN) and azathioprine (AZA) dose in the treatment of inflammatory bowel disease (IBD). However, metabolite levels are often repeatedly measured yielding a hierarchical data structure that requires more appropriate data analysis. METHODS This study explored the relationship between the weight-based dosage of AZA and metabolites levels in 86 pediatric IBD patients using multilevel analysis. Other covariates related to patient characteristics and treatment were evaluated. RESULTS This is the first study to demonstrate positive correlations between AZA dose and 6-TGN and 6-MeMPN levels and 6-MeMPN/6-TGN ratio (P < 0.001) in IBD children. Other novel predictors of metabolites were reported. Younger children exhibited lower 6-TGN and 6-MeMPN levels, probably suggesting age-related differences in metabolism and/or absorption of thiopurines. Coadministration of infliximab resulted in a significant increase in 6-TGN levels (P = 0.023). Moreover, alanine aminotransferase values positively correlated with 6-MeMPN levels (P = 0.032). The duration of AZA therapy, gender, and thiopurine methyltransferase activity were associated with metabolite levels. The wide interindividual variability in metabolite levels that accounted for 67.7%, 48.6%, and 49.4% of variance in the 6-TGN and 6-MeMPN levels and the ratio, respectively, were confirmed. CONCLUSIONS The reliable AZA dose-metabolites relationship is useful for clinicians to guide the dosing regimen to maximize clinical response and minimize side effects or to consider alternative therapies when patients have preferential production of the toxic 6-MeMPN. These results may be of potential interest for optimizing thiopurine therapy to achieve safe and efficacious AZA use in pediatric IBD patients.
Collapse
|
24
|
The effect of allopurinol and low-dose thiopurine combination therapy on the activity of three pivotal thiopurine metabolizing enzymes: results from a prospective pharmacological study. J Crohns Colitis 2013; 7:812-9. [PMID: 23317929 DOI: 10.1016/j.crohns.2012.12.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 12/04/2012] [Accepted: 12/10/2012] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Thiopurine therapy is often discontinued in inflammatory bowel disease (IBD) patients. The xanthine oxidase (XO) inhibitor allopurinol has previously shown to enhance thiopurine efficacy and to prevent adverse reactions, the mechanism of this beneficial interaction is not completely clarified. The aim of this study is to observe possible effects of allopurinol and low-dose thiopurine combination therapy on the activity of three pivotal thiopurine metabolizing enzymes. METHODS A prospective study of IBD patients failing thiopurine therapy due to a skewed thiopurine metabolism was performed. Patients were treated with allopurinol and azathioprine or mercaptopurine. Xanthine oxidase, hypoxanthine-guanine phosphoribosyl transferase (HGPRT) and thiopurine S-methyl transferase (TPMT) activities, and thiopurine metabolites concentrations were measured during thiopurine monotherapy, and after 4 and 12 weeks of combination therapy. RESULTS Of fifteen IBD patients, XO activity decreased from 0.18 (IQR 0.08-0.3) during thiopurine monotherapy to 0.14 (IQR 0.06-0.2) and 0.11 (IQR 0.06-0.2; p=0.008) mU/hour/ml at 4 and 12 weeks, respectively. HGPRT activity increased from 150 (IQR 114-176) to 180 (IQR 135-213) and 204 nmol/(h×mg protein) (IQR 173-213; p=0.013). TPMT activity seemed not to be affected. 6-Thioguanine nucleotide concentrations increased from 138 (IQR 119-188) to 235 (223-304) and to 265 pmol/8×10^8 (IQR 188-344), whereas 6-methyl mercaptopurine ribonucleotides concentrations decreased from 13230 (IQR 7130-17420) to 690 (IQR 378-1325) and 540 (IQR 240-790) pmol/8×10^8 at 4 and 12 weeks of combination therapy (both p<0.001). CONCLUSION Allopurinol and thiopurine combination-therapy seems to increase HGPRT and decrease XO activity in IBD patients, which at least in part may explain the observed changes in thiopurine metabolite concentrations.
Collapse
|
25
|
Affiliation(s)
- KL de Wit
- Department of Medicine, Guy's and St Thomas' NHS Foundation Trust, London
| | - BE White
- Department of Gastroenterology, Colchester Hospital University NHS Foundation Trust, Colchester CO4 5JL
| | - D Goldsmith
- Cardio-Renal Medicine in the Department of Nephrology, Guys and St Thomas’ NHS Foundation Trust, London
| |
Collapse
|
26
|
Exploring associations of 6-thioguanine nucleotide levels and other predictive factors with therapeutic response to azathioprine in pediatric patients with IBD using multilevel analysis. Inflamm Bowel Dis 2013; 19:2404-10. [PMID: 24013359 DOI: 10.1097/mib.0b013e3182a508c6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Metabolite monitoring and response predictors to azathioprine (AZA) in pediatric inflammatory bowel disease (IBD) are debatable. In an attempt to optimize thiopurine therapy and understand the mechanism of action of thiopurines, we correlated metabolites and other factors with AZA efficacy in children with IBD. METHODS Data from 86 children with IBD with 440 metabolite measurements were retrospectively analyzed using multilevel logistic regression analyses. A therapeutic response was defined as a pediatric Crohn's disease activity index ≤10 for Crohn's disease or a pediatric ulcerative colitis activity index ≤10 for ulcerative colitis without any treatment with steroids, antitumor necrosis factor, other immunomodulators, or exclusive enteral nutrition. RESULTS The 6-thioguanine nucleotide levels >250 pmol per 8 × 10 red blood cells correlated with a higher response (odds ratio, 4.14; 95% confidence interval, 1.49-11.46, P = 0.007), whereas 6-methyl-mercaptopurine and 6-methyl-mercaptopurine:6-thioguanine nucleotide ratio showed no correlation. Other novel response predictors in children with IBD were relative leukopenia (odds ratio, 14.01; 95% confidence interval, 3.77-52.10; P < 0.001) and the absence of lymphopenia (odds ratio, 3.71; 95% confidence interval, 1.26-10.89; P = 0.017). Lower thiopurine methyltransferase activity (P = 0.015), lower platelet count (P = 0.020), and higher aspartate aminotransferase level (P = 0.009) also predicted therapeutic response. Age, gender, patient adherence, the duration of AZA therapy, IBD type, erythrocyte count, and erythrocyte sedimentation rate did not predict efficacy. The high interindividual variability accounting for 57.7% of variance in therapeutic response was observed. CONCLUSIONS The significant 6-thioguanine nucleotide level-response relationship may support metabolite monitoring to improve thiopurine efficacy in pediatric IBD. The reported response predictors may be helpful for treatment optimization in AZA-treated children with IBD, but should be proved in prospective studies.
Collapse
|
27
|
Nguyen TVA, Nguyen TMH, Lachaux A, Boulieu R. Usefulness of thiopurine metabolites in predicting azathioprine resistance in pediatric IBD patients. J Clin Pharmacol 2013; 53:900-8. [PMID: 23856979 DOI: 10.1002/jcph.134] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 06/12/2013] [Indexed: 01/30/2023]
Abstract
Few data on azathioprine (AZA) therapy for inflammatory bowel disease (IBD) exist for children. We evaluated whether the 6-thioguanine nucleotides (6-TGN) level predicts AZA refractoriness in children with IBD and whether children benefit an AZA dose escalation. Seventy-eight children with IBD initially treated with an AZA dose of 1.5-2.5 mg/kg/day were retrospectively included. The dose was adjusted based on the clinical status. The receiver operating characteristic curve and logistic regression were used to determine predictors for AZA resistance. Initially, 18 of 40 (45%) patients receiving a dose of <2 mg/kg/day and 11 of 38 (28.9%) patients receiving a dose of 2-2.5 mg/kg/day achieved remission. The 6-TGN level above 250 pmol/8.10(8) RBCs was associated with a higher remission rate, though non-significant. Among 35 patients with a dose escalation due to treatment failure, 12 (34.3%) achieved remission (the median 6-TGN level increased from 260 to 394 pmol/8.10(8) RBCs [P = .002]), 23 (67.6%) were AZA refractory. A 6-TGN level above 405 pmol/8.10(8) RBCs was the only predictor for AZA resistance (sensitivity 78.3%, specificity 75%, OR 10.8 [95% CI: 2.1-55.7, P = .004]). Serial metabolite monitoring is useful to identify children with IBD resistant to AZA. Children who cannot achieve remission despite a 6-TGN level above 405 pmol/8.10(8) RBCs should receive alternative therapies than dose increase.
Collapse
Affiliation(s)
- Thi-Van-Anh Nguyen
- Département de Pharmacie Clinique, Pharmacocinétique et Évaluation du Médicament EA4169, Université de Lyon, Lyon 1, ISPB, Lyon, France
| | | | | | | |
Collapse
|
28
|
Appell ML, Wagner A, Hindorf U. A skewed thiopurine metabolism is a common clinical phenomenon that can be successfully managed with a combination of low-dose azathioprine and allopurinol. J Crohns Colitis 2013; 7:510-3. [PMID: 23168376 DOI: 10.1016/j.crohns.2012.10.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 10/21/2012] [Accepted: 10/26/2012] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS A skewed thiopurine metabolism is a phenomenon associated with both poor treatment response and toxicity. Our aim was to evaluate the frequency of this phenomenon and the relationship to thiopurine methyltransferase (TPMT) function. METHODS All thiopurine metabolite measurements in adult patients (n=4033) between January 2006 and April 2012 were assessed to evaluate the occurrence of a skewed metabolism and the relationship to TPMT genotype and activity. RESULTS A skewed metabolism was observed in 14% of all patients. It only developed in patients with a normal TPMT genotype, but was observed at all TPMT activity levels within the normal range (9.1-24.2 U/ml RBC). Two cases that illustrate typical clinical scenarios of a skewed metabolism and the effect of combination treatment with low-dose azathioprine and allopurinol are presented. CONCLUSIONS A skewed metabolism is a common clinical phenomenon in patients with a normal TPMT function, which can develop at all TPMT activity levels within the normal range. We suggest that metabolite measurements should be considered in patients not responding to treatment and in those with hepatotoxicity or myelotoxicity in order to detect a skewed metabolism, since this phenomenon can be successfully managed by a combination of low-dose azathioprine and allopurinol.
Collapse
Affiliation(s)
- Malin Lindqvist Appell
- Division of Drug Research/Clinical Pharmacology, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | | | | |
Collapse
|
29
|
Hou JK, Kramer JR, Richardson P, Sansgiry S, El-Serag HB. Myelosuppression monitoring after immunomodulator initiation in veterans with inflammatory bowel disease: a national practice audit. Aliment Pharmacol Ther 2012; 36:1049-56. [PMID: 23061548 PMCID: PMC3998909 DOI: 10.1111/apt.12075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 09/12/2012] [Accepted: 09/16/2012] [Indexed: 12/14/2022]
Abstract
BACKGROUND Immunomodulator medications (IMM) play a vital role in the care of patients with inflammatory bowel disease (IBD). IBD practice guidelines recommend myelosuppression monitoring after initiation of IMM. AIM To identify adherence rates and predictors of myelosuppression monitoring after IMM initiation in a large practice setting. METHODS We identified a national cohort of VA users with IBD for the fiscal years 2003-2009 using the Veterans Affairs administrative datasets. Subjects with filled prescriptions for IMM were included. The primary endpoint was the proportion of subjects who had a white blood cell (WBC) test completed within 90 days of the IMM index date. Determinants of myelosuppression monitoring were identified by univariate and multivariate analyses. RESULTS A total of 6045 unique IBD patients were identified with filled IMM prescriptions. Overall, only 57% of subjects completed a WBC test within 90 days of IMM index date. Monitoring rates increased over time, from 48% in 2003 to 75% in 2009. There was variability of monitoring rates by facility, ranging from 0 to 83%. In multivariate analyses, older age at IMM index date was associated with a lower rate of monitoring. Frequency of VA encounters and IMM index date were associated with increased rates of myelosuppression monitoring. CONCLUSIONS Monitoring for myelosuppression among veterans with inflammatory bowel disease after immunomodulator medications initiation is low with wide variability based on facility. This may reflect a low quality of care among veterans with IBD. Provider- and system-wide interventions are needed to improve adherence and reduce variability of immunomodulator medications monitoring across facilities.
Collapse
Affiliation(s)
- J. K. Hou
- Houston VA HSR&D Center of Excellence, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.,Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - J. R. Kramer
- Houston VA HSR&D Center of Excellence, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.,Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - P. Richardson
- Houston VA HSR&D Center of Excellence, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.,Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - S. Sansgiry
- Houston VA HSR&D Center of Excellence, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.,Department of Medicine, Baylor College of Medicine, Houston, TX, USA.,South Central Mental Illness Research Education and Clinical Center (MIRECC), Houston, TX, USA
| | - H. B. El-Serag
- Houston VA HSR&D Center of Excellence, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.,Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| |
Collapse
|
30
|
|
31
|
Vilas-Boas F, Magro F, Balhau R, Lopes JM, Beça F, Eloy C, Lopes S, Macedo G. Oral squamous cell carcinoma in a Crohn's disease patient taking azathioprine: case report and review of the literature. J Crohns Colitis 2012; 6:792-5. [PMID: 22464812 DOI: 10.1016/j.crohns.2012.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 02/27/2012] [Accepted: 03/05/2012] [Indexed: 02/08/2023]
Abstract
Thiopurines are widely used for remission maintenance and post-operative recurrence prevention in Crohn's disease. The increased risk of cancer in transplant recipients on azathioprine is well recognized and there are concerns that this may also be true for inflammatory bowel disease patients. We report a case of a 33-year-old Caucasian woman with Crohn's disease treated with azathioprine for 9 years who developed an ulcerated lesion at the right superior retromolar trigone. Biopsy specimen revealed a squamous cell carcinoma.
Collapse
|
32
|
Gilissen LPL, Wong DR, Engels LGJB, Bierau J, Bakker JA, Paulussen ADC, Romberg-Camps MJ, Stronkhorst A, Bus P, Bos LP, Hooymans PM, Stockbrügger RW, Neef C, Masclee AAM. Therapeutic drug monitoring of thiopurine metabolites in adult thiopurine tolerant IBD patients on maintenance therapy. J Crohns Colitis 2012; 6:698-707. [PMID: 22398098 DOI: 10.1016/j.crohns.2011.12.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 11/28/2011] [Accepted: 12/05/2011] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND AIMS Therapeutic drug monitoring of active metabolites of thiopurines, azathioprine and 6-mercaptopurine, is relatively new. The proposed therapeutic threshold level of the active 6-thioguanine nucleotides (6-TGN) is ≥235 pmol/8×10(8) erythrocytes. The aim of this prospective cross-sectional study was to compare 6-TGN levels in adult thiopurine tolerant IBD patients with an exacerbation with those in remission, and to determine the therapeutic 6-TGN cut-off level. METHODS Hundred IBD patients were included. Outcome measures were thiopurine metabolite levels, calculated therapeutic 6-TGN cut-off level, CDAI/CAI scores, thiopurine dose and TPMT enzyme activity. RESULTS Forty-one patients had an exacerbation, 59 patients were in remission. In 17% of all patients 6-TGN levels were compatible with non-compliance. The median 6-TGN levels were not significantly different between the exacerbation and remission group (227 versus 263 pmol/8×10(8) erythrocytes, p=0.29). The previous reported therapeutic 6-TGN cut-off level of 235 pmol/8×10(8) erythrocytes was confirmed in this study. Twenty-six of the 41 patients (63%) with active disease had 6-TGN levels below this threshold and 24 of 59 IBD patients (41%) in clinical remission (p=0.04). CONCLUSIONS Thiopurine non-compliance occurs frequently both in active and quiescent disease. 6-TGN levels below or above the therapeutic threshold are associated with a significant higher chance of IBD exacerbation and remission, respectively. These data support the role of therapeutic drug monitoring in thiopurine maintenance therapy in IBD to reveal non-compliance or underdosing, and can be used as a practical tool to optimize thiopurine therapy, especially in case of thiopurine non-response.
Collapse
Affiliation(s)
- Lennard P L Gilissen
- Department of Gastroenterology and Hepatology, Catharina Hospital, Eindhoven, The Netherlands.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Sorrentino D, Radford-Smith G. Clinical remission after stopping infliximab in Crohn's disease: is all that glitters true gold? Gastroenterology 2012; 142:e17; author reply e18. [PMID: 22453047 DOI: 10.1053/j.gastro.2012.02.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 02/01/2012] [Indexed: 12/02/2022]
|
34
|
Larussa T, Suraci E, Lentini M, Nazionale I, Gallo L, Abenavoli L, Imeneo M, Costanzo FS, Cuda G, Luzza F. High prevalence of polymorphism and low activity of thiopurine methyltransferase in patients with inflammatory bowel disease. Eur J Intern Med 2012; 23:273-7. [PMID: 22385887 DOI: 10.1016/j.ejim.2011.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 12/03/2011] [Accepted: 12/08/2011] [Indexed: 01/30/2023]
Abstract
BACKGROUND Gene polymorphism of thiopurine methyltransferase (TPMT) correlates with decreased enzyme activity which determines a significant risk of adverse effect reactions (ADR) in patients treated with thiopurines. The aim of this study was to investigate TPMT genotype and phenotype status in patients with inflammatory bowel diseases (IBD). METHODS Fifty-one consecutive out-patients with IBD were genotyped for the following allelic variants: rs1800462 (referred as TPMT 2 allele), rs1800460 (referred as TPMT 3B allele), and 1142345 (referred as TPMT 3C allele). Red blood cell TPMT activity was measured using a competitive micro-well immunoassay for the semi-quantitative determination of TPMT activity in red blood cells (RBC) by means of a 6-MP substrate. RESULTS Polymorphism of TPMT was found in 5 out of 51 patients (10%; 95% CI 2%-18%), three heterozygous and two homozygous carriers. Six patients (11.8%; 95% CI 2.4%-19.5%) displayed very low, 12 (23.5%; 95% CI 11.4%-34.5%) intermediate, and 33 (64.7%; 95% CI 52%-78%) normal/high TPMT activity. There were no differences between TPMT genotype and phenotype groups according to age, type of disease, smoking, and chronic medications. A 71% (95% CI 61%-81%; κ=0.45) concordance rate was found between genotype and phenotype status. Six out of 27 (22%) current or past users of azathioprine developed ADR, with three (50%) displaying TPMT genotype and/or phenotype alterations. CONCLUSION Compared to the general population, IBD patients may have significantly higher prevalence of TPMT polymorphism and, even more, low activity. Phenotypic more than genotypic TPMT analysis could be useful to better manage IBD therapy with thiopurines.
Collapse
Affiliation(s)
- Tiziana Larussa
- Department of Health Science, University of Catanzaro "Magna Graecia", Catanzaro, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Uyanikoglu A, Akyuz F, Ermis F, Besisik F, Pinarbasi B, Kaymakoglu S, Demir K, Boztas G. Azathioprine Toxicity in Inflammatory Bowel Disease. Euroasian J Hepatogastroenterol 2012. [DOI: 10.5005/jp-journals-10018-1035] [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: 11/23/2022] Open
|
36
|
Chevaux JB, Peyrin-Biroulet L. Is the dose of thioguanine the key to better safety profile? Dig Liver Dis 2011; 43:96-7. [PMID: 21156354 DOI: 10.1016/j.dld.2010.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 11/11/2010] [Indexed: 12/11/2022]
Affiliation(s)
- Jean-Baptiste Chevaux
- Inserm U954 and Department of Gastroenterology and Hepatology, Henri Poincaré 1 University, Nancy University Hospital, Vandœuvre-lès-Nancy, France
| | | |
Collapse
|