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Prentice R, Flanagan E, Wright EK, Gibson PR, Rosella S, Rosella O, Begun J, An YK, Lawrance IC, Kamm MA, Sparrow M, Goldberg R, Prideaux L, Vogrin S, Kiburg KV, Ross AL, Burns M, Bell SJ. Vedolizumab and Ustekinumab Levels in Pregnant Women With Inflammatory Bowel Disease and Infants Exposed In Utero. Clin Gastroenterol Hepatol 2024:S1542-3565(24)00252-0. [PMID: 38492905 DOI: 10.1016/j.cgh.2024.02.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 03/18/2024]
Abstract
BACKGROUND & AIMS Vedolizumab and ustekinumab pharmacokinetics in pregnancy and the infant after in utero exposure remain incompletely defined. We aim to define the antenatal stability of ustekinumab and vedolizumab levels and the time at which infant drug levels become undetectable. METHODS This multicenter prospective observational cohort study recruited pregnant or preconception women with inflammatory bowel disease receiving vedolizumab or ustekinumab. Trough drug levels, clinical data, and biochemical data were documented preconception, during each trimester of pregnancy, and postpartum. Maternal and cord blood drug levels were measured at delivery and in infants until undetectable. Infant outcomes were assessed until 2 years of age. RESULTS A total of 102 participants (vedolizumab, n = 58) were included. The majority of mothers were, and remained, in clinical and biochemical remission. Maternal vedolizumab levels decreased over the course of pregnancy in association with increasing weight, rather than increasing gestation. Maternal ustekinumab levels remained stable. The median time to drug becoming undetectable in the infant was shorter for vedolizumab (11 wk; range, 5-19 wk; n = 32) than ustekinumab (14 wk; range, 9-36 wk; n = 17) and correlated positively with infant delivery level. Thirty-two of 41 (88%) and 17 of 30 (67%) vedolizumab- and ustekinumab-exposed infants had undetectable drug levels by 15 weeks of age, respectively. Pregnancy and infant outcomes were favorable. Twenty infants with undetectable drug levels received the rotavirus vaccine, with no adverse reactions reported. CONCLUSIONS Maternal vedolizumab levels decreased, whereas ustekinumab levels remained stable over the course of pregnancy. Most vedolizumab- and approximately half of ustekinumab-exposed infants had undetectable drug levels by 15 weeks of age. No concerning maternal or infant safety signals were identified.
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Affiliation(s)
- Ralley Prentice
- Department of Gastroenterology, Monash Health, Clayton, Victoria, Australia; Department of Gastroenterology, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia; Centre of Inflammatory Disease, Department of Medicine, Monash University, Clayton, Victoria, Australia.
| | - Emma Flanagan
- Department of Gastroenterology, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia; University of Melbourne, Parkville, Victoria, Australia
| | - Emily K Wright
- Department of Gastroenterology, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia; University of Melbourne, Parkville, Victoria, Australia
| | - Peter R Gibson
- Department of Gastroenterology, Central Clinical School, Monash University and Alfred Health, Melbourne, Victoria, Australia
| | - Sam Rosella
- Department of Gastroenterology, Central Clinical School, Monash University and Alfred Health, Melbourne, Victoria, Australia
| | - Ourania Rosella
- Department of Gastroenterology, Central Clinical School, Monash University and Alfred Health, Melbourne, Victoria, Australia
| | - Jakob Begun
- Department of Gastroenterology, Mater Hospital, Brisbane, Queensland, Australia
| | - Yoon-Kyo An
- Department of Gastroenterology, Mater Hospital, Brisbane, Queensland, Australia
| | - Ian C Lawrance
- School of Medicine and Pharmacology, Faculty of Medicine and Dentistry at the University of Western Australia, Perth, Western Australia, Australia; St John of God Subiaco Hospital, Perth, Western Australia, Australia
| | - Michael A Kamm
- Department of Gastroenterology, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia; University of Melbourne, Parkville, Victoria, Australia
| | - Miles Sparrow
- Department of Gastroenterology, Central Clinical School, Monash University and Alfred Health, Melbourne, Victoria, Australia
| | - Rimma Goldberg
- Department of Gastroenterology, Monash Health, Clayton, Victoria, Australia; Centre of Inflammatory Disease, Department of Medicine, Monash University, Clayton, Victoria, Australia
| | - Lani Prideaux
- Department of Gastroenterology, Monash Health, Clayton, Victoria, Australia
| | - Sara Vogrin
- University of Melbourne, Parkville, Victoria, Australia
| | | | - Alyson L Ross
- Department of Gastroenterology, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
| | - Megan Burns
- Department of Gastroenterology, Monash Health, Clayton, Victoria, Australia
| | - Sally J Bell
- Department of Gastroenterology, Monash Health, Clayton, Victoria, Australia; Centre of Inflammatory Disease, Department of Medicine, Monash University, Clayton, Victoria, Australia; University of Melbourne, Parkville, Victoria, Australia
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Liu Z, Julsgaard M, Zhu X, Martin J, Barclay ML, Cranswick N, Gibson PR, Gearry RB, van der Giessen J, Connor SJ, Rosella O, Grosen A, Toong C, Flanagan E, Wieringa JW, Janneke van der Woude C, Bell SJ. Timing of Live Attenuated Vaccination in Infants Exposed to Infliximab or Adalimumab in Utero: A Prospective Cohort Study in 107 Children. J Crohns Colitis 2022; 16:1835-1844. [PMID: 35779236 DOI: 10.1093/ecco-jcc/jjac093] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIMS For infants exposed in utero to anti-tumour necrosis factor-α [TNF] medications, it is advised that live-attenuated vaccinations be postponed until the drug is cleared, but little is known about time to clearance. To minimize delays before live-attenuated vaccination can be given, we aimed to develop a pharmacokinetic model to predict time-to-clearance in infants exposed during pregnancy. METHODS We prospectively followed in utero infliximab/adalimumab-exposed infants of mothers with inflammatory bowel disease across four countries between 2011 and 2018. Infants with a detectable anti-TNF umbilical-cord level and at least one other blood sample during the first year of life were included. RESULTS Overall, 107 infants were enrolled, including 166 blood samples from 71 infliximab-exposed infants and 77 samples from 36 adalimumab-exposed infants. Anti-TNF was detectable in 23% [n = 25] of infants at 6 months. At 12 months, adalimumab was not detected but 4% [n = 3] had detectable infliximab. A Bayesian forecasting method was developed using a one-compartment pharmacokinetic model. Model validation showed that the predicted clearing time was in accordance with the measured observations. A clinician-friendly online calculator was developed for calculating full anti-TNF clearing time: https://xiaozhu.shinyapps.io/antiTNFcalculator2/. CONCLUSIONS Almost one-quarter of infants born to mothers receiving anti-TNF during pregnancy have detectable anti-TNF at 6 months. To limit the time to live-attenuated vaccination in infants of mothers receiving anti-TNF during pregnancy, the results of a cord drug level at birth and a second sample ≥ 1 month thereafter can be used to estimate the time for full anti-TNF clearance in these children.
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Affiliation(s)
- Zheng Liu
- Clinical Pharmacology, School of Medicine and Public Health, University of Newcastle, Hunter Medical Research Institute, Kookaburra Circuit, Australia.,Clinical Pharmacology, Department of Medicine, The Royal Children's Hospital Melbourne, Australia.,Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Mette Julsgaard
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark.,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Gastroenterology, St Vincent's Hospital, and University of Melbourne, Melbourne, Australia
| | - Xiao Zhu
- Department of Clinical Pharmacy and Pharmacy Administration, School of Pharmacy, Fudan University, China.,School of Pharmacy, University of Otago, Dunedin, New Zealand
| | - Jennifer Martin
- Clinical Pharmacology, School of Medicine and Public Health, University of Newcastle, Hunter Medical Research Institute, Kookaburra Circuit, Australia
| | - Murray L Barclay
- Departments of Gastroenterology & Clinical Pharmacology, Christchurch Hospital, Christchurch, New Zealand
| | - Noel Cranswick
- Clinical Pharmacology, Department of Medicine, The Royal Children's Hospital Melbourne, Australia
| | - Peter R Gibson
- Department of Gastroenterology, Alfred Hospital, and Monash University, Melbourne, VIC, Australia
| | - Richard B Gearry
- Department of Medicine, University of Otago, Christchurch, New Zealand
| | - Janine van der Giessen
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Susan J Connor
- Department of Gastroenterology, Liverpool Hospital, Sydney.,South Western Sydney Clinical, University of NSW Sydney.,Ingham Institute of Applied Medical Research, Sydney, Australia
| | - Ourania Rosella
- Department of Gastroenterology, Alfred Hospital, and Monash University, Melbourne, VIC, Australia
| | - Anne Grosen
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
| | - Catherine Toong
- South Western Sydney Clinical, University of NSW Sydney.,Sydney South West Pathology Service, Liverpool Hospital, University of NSW, Sydney, Australia
| | - Emma Flanagan
- Department of Gastroenterology, St Vincent's Hospital, and University of Melbourne, Melbourne, Australia
| | - Jantien W Wieringa
- Department of Pediatrics, Haaglanden Medical Center, the Hague, The Netherlands.,Department of Pediatrics, Division of Paediatric Infectious Diseases and Immunology, Erasmus MC University Medical Centre-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - C Janneke van der Woude
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Sally J Bell
- Department of Gastroenterology, St Vincent's Hospital, and University of Melbourne, Melbourne, Australia.,Department of Gastroenterology, Monash Health, and School of Clinical Sciences Monash University, Melbourne, VIC, Australia
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Flanagan E, Prentice R, Wright EK, Gibson PR, Ross AL, Begun J, Sparrow MP, Goldberg R, Rosella O, Burns M, Kiburg KV, Bell SJ. Ustekinumab levels in pregnant women with inflammatory bowel disease and infants exposed in utero. Aliment Pharmacol Ther 2022; 55:700-704. [PMID: 34907546 DOI: 10.1111/apt.16739] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/03/2021] [Accepted: 12/08/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Ustekinumab is increasingly used in pregnant women with inflammatory bowel disease (IBD). Existing safety data are reassuring, but the stability of ustekinumab levels in pregnancy, degree of transfer to the infant and time to infant clearance are unknown. METHODS In this prospective observational study, ustekinumab-exposed women with IBD had trough levels measured in each trimester of pregnancy and at delivery. Infant ustekinumab levels were measured at delivery and ongoing until clearance was achieved. Trough ustekinumab level stability in individuals across pregnancy was compared by Skillings-Mack test. Spearman coefficients were used to correlate maternal and infant delivery levels, and median time to infant ustekinumab clearance was defined. RESULTS 19 pregnant women receiving ustekinumab were included. There was no difference in ustekinumab levels across pregnancy in those with two or more representative trough levels (P = 0.83, n = 11). Infant delivery ustekinumab levels were higher than maternal levels, with a median infant:maternal ratio of 1.79 (IQR 1.26-3.1). There was a positive correlation between maternal and infant delivery ustekinumab levels (r = 0.75, P = 0.001) and an inverse correlation between the number of days from final antenatal dose and delivery infant ustekinumab level (r = -0.65, P = 0.006). Median time of infant ustekinumab clearance was 9 (range 6-19) weeks (n = 9). CONCLUSION Ustekinumab drug levels appear stable in pregnancy, with a delivery infant:maternal ratio similar to that of anti-TNFs. Infant ustekinumab clearance was complete by 20 weeks post-partum, however, infants exposed in utero should avoid live vaccination before 12 months of age until further clearance data are obtained.
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Affiliation(s)
- Emma Flanagan
- Department of Gastroenterology, St Vincent's Hospital Melbourne Pty Ltd, Melbourne, Australia
- University of Melbourne, Melbourne, Australia
| | - Ralley Prentice
- Department of Gastroenterology, St Vincent's Hospital Melbourne Pty Ltd, Melbourne, Australia
- Department of Gastroenterology, Monash Health, Melbourne, Australia
- Monash University, Clayton, Australia
| | - Emily K Wright
- Department of Gastroenterology, St Vincent's Hospital Melbourne Pty Ltd, Melbourne, Australia
- University of Melbourne, Melbourne, Australia
| | - Peter R Gibson
- Department of Gastroenterology, Alfred Health, Melbourne, Australia
- Monash University, Clayton, Australia
| | - Alyson L Ross
- Department of Gastroenterology, St Vincent's Hospital Melbourne Pty Ltd, Melbourne, Australia
| | - Jakob Begun
- Department of Gastroenterology, Mater Hospital Brisbane, Brisbane, Australia
| | - Miles P Sparrow
- Department of Gastroenterology, Alfred Health, Melbourne, Australia
- Monash University, Clayton, Australia
| | - Rimma Goldberg
- Department of Gastroenterology, Monash Health, Melbourne, Australia
- Monash University, Clayton, Australia
| | - Ourania Rosella
- Department of Gastroenterology, Alfred Health, Melbourne, Australia
| | - Megan Burns
- Department of Gastroenterology, Monash Health, Melbourne, Australia
| | - Katerina V Kiburg
- Department of Medicine, St Vincent's Hospital Melbourne Pty Ltd, Melbourne, Australia
| | - Sally J Bell
- University of Melbourne, Melbourne, Australia
- Department of Gastroenterology, Monash Health, Melbourne, Australia
- Monash University, Clayton, Australia
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Ardalan ZS, Friedman AB, Con D, Chandran S, Gibson D, Pham A, De Cruz P, Tay K, Bell S, Rosella O, Sparrow MP, Gibson PR. Accuracy of Gastrointestinal Ultrasound and Calprotectin in the Assessment of Inflammation and its Location in Patients with an Ileoanal Pouch. J Crohns Colitis 2022; 16:79-90. [PMID: 34302729 DOI: 10.1093/ecco-jcc/jjab125] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIMS In symptomatic patients with ileoanal pouches, pouchoscopy is needed for accurate diagnosis but is invasive. We aimed to assess the utility of non-invasive gastrointestinal ultrasound and faecal calprotectin in ileoanal pouch patients. METHODS Patients with an ileoanal pouch were consecutively enrolled in this cross-sectional study from clinics in Victoria, Australia. The pouchitis disease activity index was used as a reference standard. Video-recorded pouchoscopies were reviewed by three gastroenterologists. Pouch, pre-pouch, and cuff biopsies were reviewed by a single pathologist. Ultrasound was performed by a single gastroenterologist transabdominally and transperineally. Faecal calprotectin was measured from morning stool samples. All examiners were blinded to patients' clinical history. RESULTS A total of 44 participants had a pouchoscopy, of whom 43 had a faecal calprotectin test and 42 had an ultrasound; 17 had pouchitis, 15 had pre-pouch ileitis, and 16 had cuffitis. Pouch wall thickness of <3 mm was 88% sensitive in excluding pouchitis, and pouch wall thickness of ≥4 mm was 87% specific in diagnosing pouchitis. Transabdominal ultrasound had good utility [area under the curve: 0.78] in diagnosing moderate-severe pre-pouch ileitis. Transperineal ultrasound had good utility for the diagnosis of pouchitis [area under the curve: 0.79]. Faecal calprotectin differentiated inflammatory from non-inflammatory pouch disorders, such as irritable pouch syndrome, with an area under the curve of 0.90. Faecal calprotectin <100 µg/g ruled out inflammatory pouch disorders with a sensitivity of 94%. CONCLUSIONS Faecal calprotectin and ultrasound are accurate and complementary tests to diagnose and localise inflammation of the ileoanal pouch. Prospective studies are needed to validate proposed sonographic indices and calprotectin levels.
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Affiliation(s)
- Zaid S Ardalan
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, VIC, Australia
| | - Antony B Friedman
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, VIC, Australia
| | - Danny Con
- Department of Gastroenterology, Eastern Health, Melbourne, VIC, Australia
| | - Sujievvan Chandran
- Department of Gastroenterology, Austin Health, Melbourne, VIC, Australia
| | - David Gibson
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, VIC, Australia
| | - Alan Pham
- Department of Pathology, Alfred Health, Melbourne, VIC, Australia
| | - Peter De Cruz
- Department of Gastroenterology, Austin Health, Melbourne, VIC, Australia
| | - Kwang Tay
- Department of Colorectal Surgery, Monash Health, Melbourne, Vic, Australia
| | - Stephen Bell
- Department of Colorectal Surgery, Alfred Health, Melbourne, VIC, Australia
| | - Ourania Rosella
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, VIC, Australia
| | - Miles P Sparrow
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, VIC, Australia
| | - Peter R Gibson
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, VIC, Australia
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5
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Ward MG, Rosella O, Rosella G, Martin C, Gibson PR. Comparison of SB2-Infliximab With Originator-Infliximab in the Measurement of Serum Concentrations: A Short Communication. Ther Drug Monit 2021; 43:692-695. [PMID: 33492105 DOI: 10.1097/ftd.0000000000000866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 01/09/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The optimal use of infliximab depends on the measurement of trough levels with subsequent appropriate dose adjustment. With the introduction of biosimilars, it is important to demonstrate that the biosimilar behaves similarly in the assay used as the originator-infliximab, for which the assays were developed. In this study, the authors aimed to compare the concentrations of SB2-infliximab (Renflexis) with that of originator-infliximab (Remicade) when added to serum from healthy subjects and those with inflammatory bowel disease when measured by commonly used commercial assays. METHODS Sera from 2 healthy controls, 2 patients with ulcerative colitis (1 with quiescent disease and 1 with active disease), and 2 patients with Crohn disease (1 with quiescent disease and 1 with active disease) were spiked with SB2-infliximab or originator-infliximab at 0-20 mcg/mL. Concentrations were measured using 3 commonly used assay kits (Lisa-Tracker, Shikari Q-Inflix, Promonitor IFX) and one rapid test (Quantum Blue). The results were compared using Bland-Altman techniques. RESULTS Close agreement was observed between measured concentrations for all assays, irrespective of the origin of the serum. Limits of agreement varied between at worst -0.302 and 0.465 mcg/mL, with the mean difference between the molecules being at worst 0.04 mcg/mL (95% confidence intervals, -0.011 to 0.093). CONCLUSIONS The originator and SB-2 biosimilar-infliximab behaved similarly in several currently used assays in their concentrations in biological fluids. Clinicians can be confident that therapeutic drug monitoring using platforms designed and developed for the originator-infliximab can be applied to SB-2-infliximab.
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Affiliation(s)
- Mark G Ward
- Department of Gastroenterology, Alfred Hospital and Monash University, Melbourne, Victoria; and
| | - Ourania Rosella
- Department of Gastroenterology, Alfred Hospital and Monash University, Melbourne, Victoria; and
| | - Gennaro Rosella
- Department of Gastroenterology, Alfred Hospital and Monash University, Melbourne, Victoria; and
| | - Catherine Martin
- School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria
| | - Peter R Gibson
- Department of Gastroenterology, Alfred Hospital and Monash University, Melbourne, Victoria; and
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Flanagan E, Gibson PR, Wright EK, Moore GT, Sparrow MP, Connell W, Kamm MA, Begun J, Christensen B, De Cruz P, Shelton E, Dowling D, Andrews JM, Brown SJ, Niewiadomski O, Ward MG, Rosella O, Rosella G, Kiburg KV, Ross AL, Bell SJ. Infliximab, adalimumab and vedolizumab concentrations across pregnancy and vedolizumab concentrations in infants following intrauterine exposure. Aliment Pharmacol Ther 2020; 52:1551-1562. [PMID: 32981127 DOI: 10.1111/apt.16102] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/21/2020] [Accepted: 09/10/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND The impact of pregnancy on levels of biologic agents in patients with IBD is undefined and time to elimination in vedolizumab-exposed infants is unknown. AIMS To determine the effect of pregnancy on infliximab, adalimumab and vedolizumab levels and to study infant vedolizumab clearance METHODS: In a prospective observational study, maternal drug levels were measured pre-conception, in each trimester, at delivery and postpartum. The association between drug levels and gestation in weeks was assessed using generalised estimating equation modelling. Infant vedolizumab levels were performed at birth (cord blood), 6 weeks and 3 months or until undetectable. RESULTS We included 50 IBD patients (23 on infliximab, 15 on adalimumab and 12 on vedolizumab) with at least two intrapartum observations, plus 5 patients on vedolizumab with only mother and baby samples at delivery. Modelling showed no change in adalimumab levels, an increase in infliximab levels of 0.16 (95% CI 0.08-0.24) µg/L/week (P < 0.001) and a decrease of 0.18 (95% CI: -0.33 to -0.02) µg/L/week (P = 0.03) for vedolizumab. In 17 mother-baby pairs, median infant vedolizumab levels at birth were lower than maternal levels (P < 0.05) with an infant:maternal ratio of 0.7 (IQR 0.5-0.9). Vedolizumab was undetectable between 15 and 16 weeks of age in all 12 infants completing follow-up testing. CONCLUSIONS During pregnancy, adalimumab levels remain stable, while infliximab levels increase and vedolizumab levels decrease. However, the increments were small suggesting that intrapartum therapeutic drug monitoring and dose adjustment are not indicated. Unlike infliximab and adalimumab, infant vedolizumab levels are lower in cord blood than in mothers and appear to clear rapidly.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Peter De Cruz
- Parkville, VIC, Australia.,Melbourne, VIC, Australia
| | | | | | | | | | | | | | | | | | | | | | - Sally J Bell
- Fitzroy, VIC, Australia.,Melbourne, VIC, Australia
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Flanagan E, Gibson PR, Begun J, Ghaly S, Garg M, Andrews JM, Rosella O, Rosella G, Bell SJ. Letter: vedolizumab drug concentrations in neonates following intrauterine exposure. Aliment Pharmacol Ther 2018; 48:1328-1330. [PMID: 30488628 DOI: 10.1111/apt.15027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Emma Flanagan
- St Vincent's Hospital, Melbourne, Victoria, Australia
| | | | - Jakob Begun
- Mater Hospital, Brisbane, Queensland, Australia
| | - Simon Ghaly
- St Vincent's Hospital, Sydney, New South Wales, Australia
| | - Mayur Garg
- Eastern Health Clinical School, Monash University, Box Hill, Victoria, Australia
| | - Jane M Andrews
- Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - Ourania Rosella
- Monash University Central Clinical School, Melbourne, Victoria, Australia
| | - Gennaro Rosella
- Monash University Central Clinical School, Melbourne, Victoria, Australia
| | - Sally J Bell
- St Vincent's Hospital, Melbourne, Victoria, Australia
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Garg M, Rosella O, Rosella G, Wu Y, Lubel JS, Gibson PR. Evaluation of a 12-week targeted vitamin D supplementation regimen in patients with active inflammatory bowel disease. Clin Nutr 2018; 37:1375-1382. [DOI: 10.1016/j.clnu.2017.06.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/01/2017] [Accepted: 06/07/2017] [Indexed: 02/07/2023]
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Beswick L, Rosella O, Rosella G, Headon B, Sparrow MP, Gibson PR, van Langenberg DR. Exploration of Predictive Biomarkers of Early Infliximab Response in Acute Severe Colitis: A Prospective Pilot Study. J Crohns Colitis 2018; 12:289-297. [PMID: 29121178 DOI: 10.1093/ecco-jcc/jjx146] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Accepted: 10/31/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND The outcomes of acute severe ulcerative colitis [ASUC] appear to be dependent on early intervention with the first and/or further infliximab [IFX] doses, although parameters to guide decision-making remain uncertain. AIM To assess whether serum/faecal IFX levels and inflammatory biomarkers early after IFX dose can predict ASUC outcomes. METHODS This prospective pilot study consecutively recruited inpatients with steroid-refractory ASUC, who then received 1-3 IFX rescue doses [5 mg/kg per dose] at the discretion of the treating clinician. Serum IFX, C-reactive protein [CRP], albumin and faecal calprotectin [FC] concentrations were measured daily as an inpatient, and then 7, 14, 28 and 42 days post-first IFX. Faecal IFX was measured 1 day post-IFX. The primary end point was clinical remission (partial Mayo [PM] = 0) and CRP ≤3 mg/l at 6 weeks. Secondary end points were 12-week clinical remission or colectomy during follow-up. RESULTS Of 24 ASUC patients with a median follow-up of 28 months [range 13-44], 10 [42%] achieved remission at 6 weeks, 12 [50%] achieved 12-week remission, six [25%] had colectomy. In total, 97% received either two or three IFX doses. Post-first dose, receiver-operator curve-derived cutoffs of the area-under-curve [AUC, Days 4-7] concentrations for serum IFX, FC and PM scores each predicted the primary end point with 100% sensitivity, and predicted future colectomy with 89-94% sensitivity. In multivariate analyses, faecal IFX >1 µg/g (odds ratio [OR] 0.04 [0.2, 0.9]), PM AUCd1-3 < 20 (OR 20.2 [1.01, 404], each P < 0.05), FC AUCd1-3 < 10000 µg/ml [OR 13.6 [0.6, 294], trend only, p = 0.09) were each associated with clinical and CRP remission [6 weeks]. CONCLUSIONS In ASUC, post-first dose IFX, early assessment of serum/faecal IFX, calprotectin and PM scores can accurately predict future remission and colectomy, and thus potentially aid in decision-making, i.e. accelerated IFX dosing or surgical planning if/when needed.
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Affiliation(s)
- Lauren Beswick
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, Australia.,Department of Gastroenterology, Eastern Health and Monash University, Melbourne, Australia
| | - Ourania Rosella
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, Australia
| | - Gennaro Rosella
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, Australia
| | - Belinda Headon
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, Australia
| | - Miles P Sparrow
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, Australia
| | - Peter R Gibson
- Department of Gastroenterology, Alfred Health and Monash University, Melbourne, Australia
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Julsgaard M, Christensen LA, Gibson PR, Gearry RB, Fallingborg J, Hvas CL, Bibby BM, Uldbjerg N, Connell WR, Rosella O, Grosen A, Brown SJ, Kjeldsen J, Wildt S, Svenningsen L, Sparrow MP, Walsh A, Connor SJ, Radford-Smith G, Lawrance IC, Andrews JM, Ellard K, Bell SJ. Concentrations of Adalimumab and Infliximab in Mothers and Newborns, and Effects on Infection. Gastroenterology 2016; 151:110-9. [PMID: 27063728 DOI: 10.1053/j.gastro.2016.04.002] [Citation(s) in RCA: 209] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 03/21/2016] [Accepted: 04/01/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Little is known about in utero exposure to and postnatal clearance of anti-tumor necrosis factor (anti-TNF) agents in neonates. We investigated the concentrations of adalimumab and infliximab in umbilical cord blood of newborns and rates of clearance after birth, and how these correlated with drug concentrations in mothers at birth and risk of infection during the first year of life. METHODS We performed a prospective study of 80 pregnant women with inflammatory bowel diseases at tertiary hospitals in Denmark, Australia, and New Zealand from March 2012 through November 2014: 36 received adalimumab and 44 received infliximab; 39 received concomitant thiopurines during pregnancy. Data were collected from medical records on disease activity and treatment before, during, and after pregnancy. Concentrations of anti-TNF agents were measured in blood samples from women at delivery and in umbilical cords, and in infants for every 3 months until the drug was no longer detected. RESULTS The time from last exposure to anti-TNF agent during pregnancy correlated inversely with the concentration of the drugs in the umbilical cord (adalimumab: r = -0.64, P = .0003; infliximab: r = -0.77, P < .0001) and in mothers at time of birth (adalimumab, r = -0.80; infliximab, r = -0.80; P < .0001 for both). The median ratio of infant:mother drug concentration at birth was 1.21 for adalimumab (95% confidence interval [CI], 0.94-1.49) and 1.97 for infliximab (95% CI, 1.50-2.43). The mean time to drug clearance in infants was 4.0 months for adalimumab (95% CI, 2.9-5.0) and 7.3 months for infliximab (95% CI, 6.2-8.3; P < .0001). Drugs were not detected in infants after 12 months of age. Bacterial infections developed in 4 infants (5%) and viral infections developed in 16 (20%), all with benign courses. The relative risk for infection was 2.7 in infants whose mothers received the combination of an anti-TNF agent and thiopurine, compared with anti-TNF monotherapy (95% CI, 1.09-6.78; P = .02). CONCLUSIONS In a prospective study of infants born to mothers who received anti-TNF agents during pregnancy, we detected the drugs until 12 months of age. There was an inverse correlation between the time from last exposure during pregnancy and drug concentration in the umbilical cord. Infliximab was cleared more slowly than adalimumab from the infants. The combination of an anti-TNF agent and thiopurine therapy during pregnancy increased the relative risk for infant infections almost 3-fold compared with anti-TNF monotherapy. Live vaccines therefore should be avoided for up to 1 year unless drug clearance is documented, and pregnant women should be educated on the risks of anti-TNF use.
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Affiliation(s)
- Mette Julsgaard
- Department of Hepatology and Gastroenterology, University of Aarhus, Aarhus, Denmark; Department of Gastroenterology, St. Vincent's Hospital, University of Melbourne, Melbourne, Victoria, Australia.
| | - Lisbet A Christensen
- Department of Hepatology and Gastroenterology, University of Aarhus, Aarhus, Denmark
| | - Peter R Gibson
- Department of Gastroenterology, Alfred Hospital, Monash University, Melbourne, Victoria, Australia
| | - Richard B Gearry
- Department of Medicine, Christchurch Hospital, University of Otago, Christchurch, New Zealand
| | - Jan Fallingborg
- Department of Gastroenterology, Aalborg University Hospital, Aalborg, Denmark
| | - Christian L Hvas
- Department of Hepatology and Gastroenterology, University of Aarhus, Aarhus, Denmark
| | - Bo M Bibby
- Department of Biostatistics, University of Aarhus, Aarhus, Denmark
| | - Niels Uldbjerg
- Department of Obstetrics and Gynaecology, Aarhus University Hospital, University of Aarhus, Aarhus, Denmark
| | - William R Connell
- Department of Gastroenterology, St. Vincent's Hospital, University of Melbourne, Melbourne, Victoria, Australia
| | - Ourania Rosella
- Department of Gastroenterology, Alfred Hospital, Monash University, Melbourne, Victoria, Australia
| | - Anne Grosen
- Department of Hepatology and Gastroenterology, University of Aarhus, Aarhus, Denmark
| | - Steven J Brown
- Department of Gastroenterology, St. Vincent's Hospital, University of Melbourne, Melbourne, Victoria, Australia
| | - Jens Kjeldsen
- Department of Gastroenterology, Odense University Hospital, University of Odense, Odense, Denmark
| | - Signe Wildt
- Department of Medicine, Køge Hospital, University of Copenhagen, Køge, Denmark
| | | | - Miles P Sparrow
- Department of Gastroenterology, Alfred Hospital, Monash University, Melbourne, Victoria, Australia
| | - Alissa Walsh
- Department of Gastroenterology, St. Vincent's Hospital, Sydney, New South Wales, Australia
| | - Susan J Connor
- Department of Gastroenterology, Liverpool Hospital, Sydney, New South Wales, Australia
| | - Graham Radford-Smith
- Inflammatory Bowel Diseases Unit, Royal Brisbane and Women's Hospital, University of Queensland School of Medicine, Brisbane, Queensland, Australia
| | - Ian C Lawrance
- School of Medicine and Pharmacology, University of Western Australia, Harry Perkins Institute for Medical Research, Murdoch, Western Australia, Australia; Centre for Inflammatory Bowel Diseases, Saint John of God Hospital, Subiaco, Western Australia, Australia
| | - Jane M Andrews
- Department of Gastroenterology and Hepatology, Royal Adelaide Hospital, University of Adelaide, Adelaide, South Australia, Australia
| | - Kathrine Ellard
- Department of Gastroenterology, Royal North Shore Hospital, Sydney, Australia
| | - Sally J Bell
- Department of Gastroenterology, St. Vincent's Hospital, University of Melbourne, Melbourne, Victoria, Australia
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Abstract
OBJECTIVE Colonic fermentation in patients with UC in remission was compared with that in matched healthy subjects on habitual diets and when dietary fibre was increased. DESIGN Fibre intake, faecal output of fibre (measured as non-starch polysaccharide (NSP)), starch, microbiota and fermentation products, and whole gut transit time (WGTT) were assessed in association with habitual diet and when dietary intake of wheat bran (WB)-associated fibre and high amylose-associated resistant starch (RS) was increased in an 8-week, randomised, single-blind, cross-over study. RESULTS Despite a tendency to lower habitual fibre intake in UC patients, faecal NSP and starch concentrations were threefold higher than in controls, whereas concentrations of phenols and short-chain fatty acids, pH and WGTT were similar. Increasing RS/WB intake was well tolerated. In controls (n=10), it more than doubled faecal NSP and starch excretion (p=0.002 for both), had no effect on NSP usage and reduced WGTT (p=0.024). In UC patients (n=19), high intake of RS/WB tended to normalise gut transit, but did not increase the proportion of NSP fermented. Increasing intake of RS/WB had little effect on faecal fermentation patterns or the structure of the microbiota. However, faeces from the UC cohort had lower proportions of Akkermansia muciniphila and increased diversity within Clostridium cluster XIVa compared to controls. CONCLUSIONS Gut fermentation of NSP and starch is diminished in patients with UC. This cannot be explained by abnormal gut transit and was not corrected by increasing RS/WB intake, and may be due to abnormal functioning of the gut microbiota. TRIAL REGISTRATION NUMBER Australian New Zealand Clinical Trials Registry: ACTRN12614000271606.
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Affiliation(s)
- Sally L James
- Eastern Health Clinical School, Monash University, Box Hill Hospital, Box Hill, Victoria, Australia
| | - Claus T Christophersen
- Commonwealth Scientific & Industrial Research Organisation (CSIRO) Food Futures Flagship and CSIRO Animal, Food and Health Sciences, Adelaide, Australia
| | - Anthony R Bird
- Commonwealth Scientific & Industrial Research Organisation (CSIRO) Food Futures Flagship and CSIRO Animal, Food and Health Sciences, Adelaide, Australia
| | - Michael A Conlon
- Commonwealth Scientific & Industrial Research Organisation (CSIRO) Food Futures Flagship and CSIRO Animal, Food and Health Sciences, Adelaide, Australia
| | - Ourania Rosella
- Eastern Health Clinical School, Monash University, Box Hill Hospital, Box Hill, Victoria, Australia Department of Gastroenterology, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Peter R Gibson
- Eastern Health Clinical School, Monash University, Box Hill Hospital, Box Hill, Victoria, Australia Department of Gastroenterology, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Jane G Muir
- Eastern Health Clinical School, Monash University, Box Hill Hospital, Box Hill, Victoria, Australia Department of Gastroenterology, Central Clinical School, Monash University, Melbourne, Victoria, Australia
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Biesiekierski JR, Peters SL, Newnham ED, Rosella O, Muir JG, Gibson PR. No effects of gluten in patients with self-reported non-celiac gluten sensitivity after dietary reduction of fermentable, poorly absorbed, short-chain carbohydrates. Gastroenterology 2013. [PMID: 23648697 DOI: 10.1053/j.gastro.2013.04.05] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND & AIMS Patients with non-celiac gluten sensitivity (NCGS) do not have celiac disease but their symptoms improve when they are placed on gluten-free diets. We investigated the specific effects of gluten after dietary reduction of fermentable, poorly absorbed, short-chain carbohydrates (fermentable, oligo-, di-, monosaccharides, and polyols [FODMAPs]) in subjects believed to have NCGS. METHODS We performed a double-blind cross-over trial of 37 subjects (aged 24-61 y, 6 men) with NCGS and irritable bowel syndrome (based on Rome III criteria), but not celiac disease. Participants were randomly assigned to groups given a 2-week diet of reduced FODMAPs, and were then placed on high-gluten (16 g gluten/d), low-gluten (2 g gluten/d and 14 g whey protein/d), or control (16 g whey protein/d) diets for 1 week, followed by a washout period of at least 2 weeks. We assessed serum and fecal markers of intestinal inflammation/injury and immune activation, and indices of fatigue. Twenty-two participants then crossed over to groups given gluten (16 g/d), whey (16 g/d), or control (no additional protein) diets for 3 days. Symptoms were evaluated by visual analogue scales. RESULTS In all participants, gastrointestinal symptoms consistently and significantly improved during reduced FODMAP intake, but significantly worsened to a similar degree when their diets included gluten or whey protein. Gluten-specific effects were observed in only 8% of participants. There were no diet-specific changes in any biomarker. During the 3-day rechallenge, participants' symptoms increased by similar levels among groups. Gluten-specific gastrointestinal effects were not reproduced. An order effect was observed. CONCLUSIONS In a placebo-controlled, cross-over rechallenge study, we found no evidence of specific or dose-dependent effects of gluten in patients with NCGS placed diets low in FODMAPs.
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Affiliation(s)
- Jessica R Biesiekierski
- Department of Gastroenterology, Eastern Health Clinical School, Monash University, Box Hill, Victoria, Australia
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13
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Biesiekierski JR, Peters SL, Newnham ED, Rosella O, Muir JG, Gibson PR. No effects of gluten in patients with self-reported non-celiac gluten sensitivity after dietary reduction of fermentable, poorly absorbed, short-chain carbohydrates. Gastroenterology 2013; 145:320-8.e1-3. [PMID: 23648697 DOI: 10.1053/j.gastro.2013.04.051] [Citation(s) in RCA: 502] [Impact Index Per Article: 45.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 04/24/2013] [Accepted: 04/30/2013] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Patients with non-celiac gluten sensitivity (NCGS) do not have celiac disease but their symptoms improve when they are placed on gluten-free diets. We investigated the specific effects of gluten after dietary reduction of fermentable, poorly absorbed, short-chain carbohydrates (fermentable, oligo-, di-, monosaccharides, and polyols [FODMAPs]) in subjects believed to have NCGS. METHODS We performed a double-blind cross-over trial of 37 subjects (aged 24-61 y, 6 men) with NCGS and irritable bowel syndrome (based on Rome III criteria), but not celiac disease. Participants were randomly assigned to groups given a 2-week diet of reduced FODMAPs, and were then placed on high-gluten (16 g gluten/d), low-gluten (2 g gluten/d and 14 g whey protein/d), or control (16 g whey protein/d) diets for 1 week, followed by a washout period of at least 2 weeks. We assessed serum and fecal markers of intestinal inflammation/injury and immune activation, and indices of fatigue. Twenty-two participants then crossed over to groups given gluten (16 g/d), whey (16 g/d), or control (no additional protein) diets for 3 days. Symptoms were evaluated by visual analogue scales. RESULTS In all participants, gastrointestinal symptoms consistently and significantly improved during reduced FODMAP intake, but significantly worsened to a similar degree when their diets included gluten or whey protein. Gluten-specific effects were observed in only 8% of participants. There were no diet-specific changes in any biomarker. During the 3-day rechallenge, participants' symptoms increased by similar levels among groups. Gluten-specific gastrointestinal effects were not reproduced. An order effect was observed. CONCLUSIONS In a placebo-controlled, cross-over rechallenge study, we found no evidence of specific or dose-dependent effects of gluten in patients with NCGS placed diets low in FODMAPs.
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Affiliation(s)
- Jessica R Biesiekierski
- Department of Gastroenterology, Eastern Health Clinical School, Monash University, Box Hill, Victoria, Australia
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14
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Biesiekierski JR, Rosella O, Rose R, Liels K, Barrett JS, Shepherd SJ, Gibson PR, Muir JG. Quantification of fructans, galacto-oligosacharides and other short-chain carbohydrates in processed grains and cereals. J Hum Nutr Diet 2011; 24:154-76. [PMID: 21332832 DOI: 10.1111/j.1365-277x.2010.01139.x] [Citation(s) in RCA: 225] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Wholegrain grains and cereals contain a wide range of potentially protective factors that are relevant to gastrointestinal health. The prebiotics best studied are fructans [fructooligosaccharides (FOS), inulin] and galactooligosaccharides (GOS). These and other short-chain carbohydrates can also be poorly absorbed in the small intestine (named fermentable oligo-, di- and monosaccharides and polyols; FODMAPs) and may have important implications for the health of the gut. METHODS In the present study, FODMAPs, including fructose in excess of glucose, FOS (nystose, kestose), GOS (raffinose, stachyose) and sugar polyols (sorbitol, mannitol), were quantified using high-performance liquid chromatography with an evaporative light scattering detector. Total fructan was quantified using an enzymic hydrolysis method. RESULTS Fifty-five commonly consumed grains, breakfast cereals, breads, pulses and biscuits were analysed. Total fructan were the most common short-chain carbohydrate present in cereal grain products and ranged (g per portion as eaten) from 1.12 g in couscous to 0 g in rice; 0.6 g in dark rye bread to 0.07 g in spelt bread; 0.96 g in wheat-free muesli to 0.11 g in oats; and 0.81 g in muesli fruit bar to 0.05 g in potato chips. Raffinose and stachyose were most common in pulses. CONCLUSIONS Composition tables including FODMAPs and prebiotics (FOS and GOS) that are naturally present in food will greatly assist research aimed at understanding their physiological role in the gut.
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Affiliation(s)
- J R Biesiekierski
- Department of Medicine, Monash University, Box Hill, Victoria, Australia
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15
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Barrett JS, Gearry RB, Muir JG, Irving PM, Rose R, Rosella O, Haines ML, Shepherd SJ, Gibson PR. Dietary poorly absorbed, short-chain carbohydrates increase delivery of water and fermentable substrates to the proximal colon. Aliment Pharmacol Ther 2010; 31:874-82. [PMID: 20102355 DOI: 10.1111/j.1365-2036.2010.04237.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Functional gut symptoms are induced by inclusion and reduced by dietary restriction of poorly absorbed short-chain carbohydrates (FODMAPs), but the mechanisms of action remain untested. AIMS To determine the effect of dietary FODMAPs on the content of water and fermentable substrates of ileal effluent. METHODS Twelve ileostomates without evidence of small intestinal disease undertook two 4-day dietary periods, comprising diets differing only in FODMAP content in a randomized, cross-over, single-blinded intervention study. Daytime (14 h) ileal effluent was collected on day four of each diet. Patients rated effluent volume and consistency on a 10-cm visual analogue scale. The FODMAP content of the diet and effluent was measured. RESULTS Ingested FODMAPs of 32% (range 6-73%) was recovered in the high FODMAP diet effluent. Effluent collection weight increased by a mean of 22% (95% CI, 5-39), water content by 20% (2-38%) and dry weight by 24% (4-43%) with the high compared to low FODMAP diet arm. Output increased by 95 (28-161) mL. Volunteers perceived effluent consistency was thicker (95% CI, 0.6-1.9) with the low FODMAP diet than with the high FODMAP diet (3.5-6.1; P = 0.006). CONCLUSIONS These data support the hypothetical mechanism; FODMAPs increase delivery of water and fermentable substrates to the proximal colon.
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Affiliation(s)
- J S Barrett
- Monash University Department of Medicine, Box Hill Hospital, Box Hill, Vic., Australia.
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16
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Muir JG, Rose R, Rosella O, Liels K, Barrett JS, Shepherd SJ, Gibson PR. Measurement of short-chain carbohydrates in common Australian vegetables and fruits by high-performance liquid chromatography (HPLC). J Agric Food Chem 2009; 57:554-65. [PMID: 19123815 DOI: 10.1021/jf802700e] [Citation(s) in RCA: 227] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Fermentable oligo-, di-, and monosaccharides and polyols (FODMAPs) are short-chain carbohydrates that can be poorly absorbed by the small intestine and may have a wide range of effects on gastrointestinal processes. FODMAPs include lactose, fructose in excess of glucose, fructans and fructooligosaccharides (FOS, nystose, kestose), galactooligosaccharides (GOS, raffinose, stachyose), and sugar polyols (sorbitol, mannitol). This paper describes an analytical approach based on HPLC with ELSD that quantifies the major FODMAPs in 45 vegetables and 41 fruits. Sorbitol and/or mannitol were measured in 18 vegetables (range = 0.09-2.96 g/100 g of fw), raffinose and/or stachyose in 7 vegetables (0.08-0.68 g/100 g of fw), and nystose and/or kestose in 19 vegetables (0.02-0.71 g/100 g of fw). Apple, pear, mango, clingstone peach, and watermelon all contained fructose in excess of glucose. Sorbitol was measured in 15 fruits (0.53-5.99 g/100 g of fw), mannitol was found in 2 fruits, and nystose or kestose was measured in 8 fruits. Understanding the importance of dietary FODMAPs will be greatly assisted by comprehensive food composition data.
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Affiliation(s)
- Jane G Muir
- Department of Medicine, Monash University, Box Hill Hospital, Clive Ward Centre, Victoria, Australia.
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17
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Muir JG, Shepherd SJ, Rosella O, Rose R, Barrett JS, Gibson PR. Fructan and free fructose content of common Australian vegetables and fruit. J Agric Food Chem 2007; 55:6619-27. [PMID: 17625872 DOI: 10.1021/jf070623x] [Citation(s) in RCA: 163] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Fructans are not digested in the small intestines of humans. While many health benefits have been attributed to these carbohydrates, they can cause gastrointestinal symptoms in some individuals. We measured the total fructans in 60 vegetables and 43 fruits using the Megazyme fructan assay. Vegetables with the highest quantity of fructans included garlic, artichoke, shallots, leek bulb, and onions (range, 1.2-17.4 g/100 g fw). Fruits with low, but detectable, fructans included longon, white peach, persimmon, and melon (range, 0.21-0.46 g/100 g fw). The fructan assay was modified to provide an estimate of the average chain length (degree of polymerization) for high fructan vegetables. d-Fructose can also be malabsorbed in the small intestine of humans, so the d-fructose content in some foods was measured to supplement the current food tables. Research in this area will be facilitated through the availability of more comprehensive food composition data.
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Affiliation(s)
- Jane G Muir
- Monash University, Department of Medicine, Box Hill Hospital, Victoria 3128, Australia.
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Rosella O, Sinclair A, Gibson PR. Polyunsaturated fatty acids reduce non-receptor-mediated transcellular permeation of protein across a model of intestinal epithelium in vitro. J Gastroenterol Hepatol 2000; 15:626-31. [PMID: 10921416 DOI: 10.1046/j.1440-1746.2000.02215.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND Dietary polyunsaturated fatty acids influence the natural history of intestinal inflammatory diseases. Varying the types of long-chain fatty acids that are exposed to cells alters the physicochemical properties of cell membranes. This study aimed to determine whether such variations alter transcellular and paracellular permeability in intestinal epithelium. METHODS Monolayers of Caco-2 cells, allowed to differentiate by culturing for 7 days following confluence, were used as the model for intestinal epithelium. Paracellular permeability was assessed by measurement of transepithelial resistance, while transcellular permeability was assessed by the transepithelial flux of horseradish peroxidase. RESULTS Exposure of the cells to 100 micromol/L of palmitic acid, oleic acid, eicosapentaenoic acid, or linoleic acid, was not toxic to cells (measured by leakage of lactate dehydrogenase), and altered cell membrane fatty acid composition (as measured by gas chromatography). Flux of horseradish peroxidase was significantly affected by 24 h fatty acid exposure (P= 0.038, ANOVA), being decreased by 23 +/- 6% (mean +/- SEM) by eicosapentaenoic acid and 25 +/- 3% by linoleic acid. Oleic acid, palmitic acid and butyrate, had no effect. Transepithelial resistance also varied significantly across the treatment groups (P< 0.001) due to a 28 +/- 5% increase induced by butyrate. The long-chain fatty acids had no effect. CONCLUSIONS Both omega-3 and omega-6 polyunsaturated fatty acids reduce transcellular, non-receptor-mediated permeation of proteins across differentiated Caco2 cell monolayers, without altering paracellular permeability. Alteration of intestinal barrier function should be considered as a possible mechanism of action of dietary polyunsaturated fatty acids.
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Affiliation(s)
- O Rosella
- Department of Medicine, University of Melbourne, The Royal Melbourne Hospital, Victoria, Australia
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19
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Gibson PR, Nov R, Fielding M, McIntyre A, Finch CF, Rosella O, Mariadason JM, Barkla DH, Young GP. Relationship of hydrolase activities to epithelial cell turnover in distal colonic mucosa of normal rats. J Gastroenterol Hepatol 1999; 14:866-72. [PMID: 10535467 DOI: 10.1046/j.1440-1746.1999.01973.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND The relationships between changes induced by diet in colonic epithelial kinetics and in the activities of brush border hydrolases are poorly defined. The aims of this study are to define these relationships, as changes in kinetics would be expected to influence differentiation, and to determine whether the type of ingested dietary indigestible carbohydrates influences hydrolase activities. METHODS Groups of eight rats were fed a low fibre diet +/- supplements of different types of indigestible carbohydrates for 4 weeks. Alkaline phosphatase (ALP) and dipeptidyl peptidase IV (DPPIV) activities and epithelial kinetics were measured in distal colonic mucosa. RESULTS Median ALP activities correlated positively and DPPIV activity negatively with the median proportion of cells entering metaphase (r = 0.58 and -0.58, respectively; P < 0.05) and number of metaphase arrests per crypt column across the diets (r = 0.59 and 0.58, respectively; P < 0.05). Stepwise regression analysis showed that both hydrolases independently predicted these kinetic indices (R2 > 63% for each). Mucosal ALP activities were markedly elevated during consumption of raw potato starch, guar gum and methylcellulose, while only potato starch caused a significant elevation of DPPIV activities. CONCLUSIONS The type of indigestible carbohydrate in the diet influences colonic mucosal hydrolase activities. The opposite relationship between kinetics and each of the two hydrolases indicates that these hydrolases do not reflect the same event; dipeptidyl peptidase IV might relate to differentiation status while ALP could also be influenced by epithelial irritation due to changes in luminal conditions.
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Affiliation(s)
- P R Gibson
- University of Melbourne Department of Medicine, The Royal Melbourne Hospital, Victoria, Australia.
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20
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Gibson PR, Rosella O, Wilson AJ, Mariadason JM, Rickard K, Byron K, Barkla DH. Colonic epithelial cell activation and the paradoxical effects of butyrate. Carcinogenesis 1999; 20:539-44. [PMID: 10223179 DOI: 10.1093/carcin/20.4.539] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Butyrate may have paradoxical effects on epithelial cells of similar origin. This study aimed to examine the hypothesis that one mechanism that dictates a cell's response to butyrate is its state of activation. First, the responses to 24 h exposure to butyrate (1-2 mM) of normal and neoplastic human colonic epithelial cells activated by their isolation and primary culture, and of colon cancer cell lines, LIM1215 and Caco-2, were examined. In primary cultures of normal and cancer cells, butyrate had no effect on alkaline phosphatase activities but significantly suppressed urokinase receptor expression by a mean +/- SEM of 30 +/- 12% and 36 +/- 9%, respectively. Interleukin-8 secretion was suppressed by 44 +/- 7% in normal cells (P < 0.05) but was unchanged in cancer cells. In contrast, the cell lines significantly increased alkaline phosphatase activities by >50%, urokinase receptor expression >2-fold and interleukin-8 secretion >3-fold in response to butyrate. Secondly, the effect of butyrate on Caco-2 cells was examined with or without prior exposure to a specific activating stimulus [tumour necrosis factor alpha (TNF alpha)]. Interleukin-8 secretion increased by 145 +/- 23% and 132 +/- 17% on 24 h exposure to 2 mM butyrate or 0.1 microM TNF alpha alone, respectively. However, in cells pre-treated with TNF alpha, butyrate significantly inhibited secretion by 34 +/- 7% below unstimulated levels. The response to butyrate of urokinase receptor, whose expression was not stimulated by TNF alpha, was unchanged. These effects were mimicked by trichostatin A, an inhibitor of histone deacetylase, suggesting that butyrate's paradoxical effects may have been operating by the same mechanism. In conclusion, some of the paradoxical effects of butyrate do not appear to represent inherent differences between normal and transformed cells. Rather, the response may be determined by the state of activation of the cells.
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Affiliation(s)
- P R Gibson
- University of Melbourne Department of Medicine, Victoria, Australia.
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Abstract
BACKGROUND The functions of urokinase in intestinal epithelia are unknown. AIMS To determine the relation of urokinase expressed by intestinal epithelial cells to their position in the crypt-villus/surface axis and of mucosal urokinase activity to epithelial proliferative kinetics in the distal colon. METHODS Urokinase expression was examined immunohistochemically in human intestinal mucosa. Urokinase activity was measured colorimetrically in epithelial cells isolated sequentially from the crypt-villus axis of the rat small intestine. In separate experiments, urokinase activity and epithelial kinetics (measured stathmokinetically) were measured in homogenates of distal colonic mucosa of 14 groups of eight rats fed diets known to alter epithelial turnover. RESULTS From the crypt base, an ascending gradient of expression and activity of urokinase was associated with the epithelial cells. Median mucosal urokinase activities in each of the dietary groups of rats correlated positively with autologous median number of metaphase arrests per crypt (r=0.68; p<0.005) and per 100 crypt cells (r=0.75; p<0.001), but not with crypt column height. CONCLUSIONS Localisation of an enzyme capable of leading to digestion of cell substratum in the region where cells are loosely attached to their basement membrane, and the association of its activity with indexes of cell turnover, suggest a role for urokinase in facilitating epithelial cell loss in the intestine.
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Affiliation(s)
- P R Gibson
- Department of Medicine, The Royal Melbourne Hospital, Victoria, Australia
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22
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Gibson PR, Kilias D, Rosella O, Day JM, Abbott M, Finch CF, Young GP. Effect of topical butyrate on rectal epithelial kinetics and mucosal enzyme activities. Clin Sci (Lond) 1998; 94:671-6. [PMID: 9854467 DOI: 10.1042/cs0940671] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1. This study aimed to determine the effect of luminal butyrate on proliferative kinetics, a differentiation marker (alkaline phosphatase), and a molecule that controls cell-substratum adhesion (urokinase) in histologically normal human rectal mucosa. 2. Ten subjects with a colonoscopically normal colon (seven had previous adenomas) were given either butyrate or saline enemas for 4 days in a double-blind cross-over manner. Rectal biopsies were taken before and after each course of enemas. Epithelial proliferative kinetics were measured immunohistochemically using antibodies to proliferating cell nuclear antigen. Urokinase and alkaline phosphatase activities were measured spectrophotometrically in biopsy homogenates. 3. Both saline and butyrate enemas were well tolerated and induced no histological change except for a significant increase in crypt length (P < 0.05). The number of proliferating cells per crypt also increased significantly after butyrate (P = 0.018). 4. Compared with saline enemas, butyrate did not affect kinetic indices nor alkaline phosphatase activities. However, mucosal urokinase activities were significantly lower in butyrate-treated patients (9.5 +/- 2.0 i.u./g) than in saline-treated patients (12.8 +/- 2.0 i.u./g; P = 0.045). 5. Delivering of extra butyrate to the distal colon in healthy subjects may stabilize cell-substratum adhesion in surface epithelium and therefore offer a potential mechanism by which elevating distal colonic luminal butyrate concentrations might be beneficial in patients with colitis or hyperproliferative large bowel epithelium.
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Affiliation(s)
- P R Gibson
- University of Melbourne, Department of Medicine, Royal Melbourne Hospital, Victoria, Australia
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23
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Abstract
Epithelia from several sites exhibit inducible secretion of interleukin 8 (IL-8). This study aimed to characterise secretion of IL-8 by colonic epithelial cells in vitro. Colonic crypt cells were isolated enzymatically from resected colon and the IL-8 content of culture supernates was measured by ELISA. The rate of secretion of IL-8 accelerated and levels of IL-8 transcripts increased appreciably during culture. Exposure to tumour necrosis factor alpha (TNF alpha) failed to increase secretion further. Secretion was not induced by the enzymatic digestion or by serum used in the culture medium but was significantly inhibited by butyrate, by a mean of 23%. Control experiments indicated that colonic crypt cells were the likely source. The secretion of IL-8 over 24 hours by cells from uninflamed mucosa of patients with ulcerative colitis or Crohn's disease was more than twofold that from normal cells, while that from cancer bearing colons was normal. TNF alpha (10 mM) significantly suppressed IL-8 secretion only in the ulcerative colitis group and the change was different to those in the normal (p = 0.007) and Crohn's disease groups (p = 0.012). Cells from inflamed areas secreted more IL-8 than those from autologous uninflamed areas (p = 0.009) but responses to modulating factors were no different. The induction of IL-8 secretion by colonic crypt cells in vitro is probably a response to injury associated with isolation and culture. It is suppressed by butyrate and increased in inflammatory bowel disease independently of the presence of mucosal inflammation. Whether epithelial derived IL-8 plays a part in the pathogenesis of inflammatory bowel disease is not yet clear.
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Affiliation(s)
- P Gibson
- University of Melbourne, Department of Medicine, Royal Melbourne Hospital, Victoria, Australia
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24
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Abstract
The hypothesis that the colonic epithelium is diffusely abnormal in ulcerative colitis was examined by comparing disease related responses in expression of markers of differentiation by colonic crypt cells to culture with and without butyrate. Cells were isolated from patients with normal colon (15), cancer (24), ulcerative colitis (19), or Crohn's disease (16). Alkaline phosphatase activities were measured in cell homogenates and the rate of glycoprotein synthesis assessed at the end of 24 hours of culture and expressed relative to the rate of protein synthesis as the G:P ratio. Alkaline phosphatase activities, but not G:P ratios, differed across the groups before and after 24 hour culture (p < 0.05), activities being lowest in the cancer group and highest in inflammatory bowel disease groups. Butyrate (1 mM) suppressed alkaline phosphatase activities in the cancer group by mean (SEM) of 17 (4) (p = 0.006) compared with no change in the other groups. Butyrate suppressed G:P ratios only in the cancer (6 (3)%, p = 0.03) and ulcerative colitis groups (5 (3)%, p = 0.04) and the changes in both were different (p < 0.05) from those in normal cells (increase of 10 (7)%). Changes in ulcerative colitis were different from those in Crohn's disease (p = 0.029). Responses were independent of the presence or absence of mucosal inflammation. These data confirm the diffuse nature of epithelial abnormalities in colorectal cancer. In ulcerative colitis, a different pattern of abnormality occurs, supporting the notion that the epithelium is also diffusely abnormal independent of mucosal inflammation.
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Affiliation(s)
- P Gibson
- University of Melbourne, Department of Medicine, Royal Melbourne Hospital, Victoria, Australia
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25
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Abstract
The amount and type of dietary fibre ingested influences colonic luminal characteristics, especially the concentration of carbohydrate fermentation products such as butyrate. This study aimed to assess whether diets supplemented with fibres of differing fermentability (delivering different amounts of butyrate to the colon) influence mucosal activities of urokinase and brush border hydrolases, and epithelial turnover. Groups of five rats were fed one of four diets containing low (2%), highly fermented (guar 10% or oat bran 10%) or slowly fermented fibre (wheat bran 10%) for 4 weeks. Activities of urokinase, alkaline phosphatase, dipeptidyl peptidase IV and maltase were measured in mucosal homogenates of proximal and distal colon and from rectum. Proliferative kinetics were assessed in distal and proximal colon by the metaphase arrest technique. Hydrolase activities were similar across all four dietary groups but a significant difference was found for urokinase (P = 0.014). This was due to a reduction in urokinase activities of > 30% at the three sites in the wheat bran group compared with the other groups. Of proliferative indices, only crypt column height differed across the groups (P = 0.038) and was highest in rats fed wheat bran and lowest in those fed the low fibre diet (P = 0.047). The proportion of mitoses in the top one-fifth of the crypt also differed across groups (P = 0.038) due to the high values in the distal colon of the low fibre group. Thus, addition of a slowly fermented (but not highly fermented) fibre to the diet of rats reduces net urokinase activity in large bowel mucosa and increases the life span of colonic epithelial cells without changing activities of brush border hydrolases.
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Affiliation(s)
- P Gibson
- Department of Medicine, University of Melbourne, Royal Melbourne Hospital, Parkville, Victoria, Australia
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26
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Abstract
BACKGROUND/AIMS Because the neutral protease urokinase is important in control of cell adhesion and migration, the effects of the physiologically relevant fermentation product butyrate on urokinase secretion by colonic epithelium were examined. METHODS Secreted and cell-associated levels of urokinase and plasminogen activator inhibitor 1 were measured in colonic crypt cells within 24 hours of isolation from macroscopically normal mucosa of normal or cancer-bearing colons. RESULTS Butyrate caused a concentration-dependent inhibition of both secreted (56% +/- 4% inhibition after 24-hour exposure to 1 mmol/L butyrate; n = 20; mean +/- SEM; P < 0.001) and cell-associated urokinase content (35% +/- 6%; P = 0.003). Acetate and propionate had minimal effects. Butyrate also stimulated plasminogen activator inhibitor 1 secretion by 25% +/- 7% (P = 0.013). Net urokinase activities were suppressed in supernates and cell homogenates by butyrate. Levels of transcripts for urokinase and the inhibitor changed with butyrate exposure in parallel to the levels of secretion of the respective proteins. Cells from the cancer group showed significantly reduced inhibitor secretion and abnormal responses to butyrate (greater inhibition of urokinase secretion and no stimulation of inhibitor secretion), probably reflecting the diffuse disturbance of colonic epithelial biology associated with colorectal cancer. CONCLUSIONS Butyrate has dual effects in markedly reducing colonic epithelial urokinase activity, and these may have important implications to understanding colonic epithelial physiology and the pathogenesis and treatment of colonic diseases.
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Affiliation(s)
- P R Gibson
- Department of Medicine, University of Melbourne, Royal Melbourne Hospital, Victoria, Australia
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27
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Abstract
Urokinase is a neutral protease whose major site of action is the external surface of the plasma membrane of cells and whose major function seems to be modulation of cell adhesion, such as that which occurs during cell migration. This study aimed to determine whether colonic epithelium is involved with the urokinase system. The contents of urokinase and one of its specific inhibitors, plasminogen activator inhibitor-1, were measured in culture supernatant and cell homogenates of isolated human colonic crypt cells. The amounts of both factors increased in supernatants over 24 hours, and approximately twice the amount was found in supernatants than in autologous cell homogenates. The secretion of both factors was similar in serum free and serum containing media. Northern blot analysis showed that messenger ribonucleic acid specific for urokinase and plasminogen activator inhibitor-1 was present in colonic crypt cells and that expression over 18 hours of culture was increased 12 fold for urokinase type plasminogen activator and two to fourfold for the inhibitor compared with values found in autologous freshly isolated cells. Urokinase activity was detected in crypt cell homogenates and supernatants indicating that it was present in excess of its inhibitors. Control experiments indicated that the epithelial cells themselves were responsible for the observations and excluded artefactual effects of the isolation procedure. In conclusion, isolated human colonic epithelial cells secrete urokinase and at least one of its specific inhibitors. Further investigation of the role of urokinase in the physiology and pathophysiology of colonic epithelium is indicated.
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Affiliation(s)
- P Gibson
- Department of Medicine, University of Melbourne, Royal Melbourne Hospital, Victoria, Australia
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28
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Abstract
In colitis, colonic epithelial cells have a shortened life span but show normal or increased expression of phenotypic markers of differentiation. This study examined the effect of differing culture conditions on the expression of such markers in colonic crypt cells. Crypt cells were enzymatically isolated from macroscopically normal large bowel mucosa resected because of neoplasia, inflammatory bowel disease or non-neoplastic non-inflammatory conditions. Cells cultured in the presence of serum exhibited a doubling of the rate of protein synthesis (measured by 14C-leucine uptake; p < 0.001) compared with autologous cells cultured in the absence of serum without evidence of loss of cell viability (assessed by 51Cr release from prelabelled cells) or of change in the rate of cell proliferation (assessed by total DNA content and 3H-thymidine uptake). Irrespective of the underlying colonic disease, crypt cells cultured in the absence of serum exhibited increased expression of phenotypic markers of differentiation compared with those cultured with serum: the rate of glycoprotein synthesis relative to that of protein synthesis increased by a mean of 59% and the cellular expression of brush border glycoproteins, alkaline phosphatase, and carcinoembryonic antigen significantly increased. The effects seen could not be mimicked by addition of dexamethasone or insulin to serum free medium. Thus, under less optimal (serum free) culture conditions, colonic crypt cells express phenotypic markers of differentiation at an accelerated rate suggesting that unfavourable microenvironmental conditions themselves are probably in part responsible for the normal or increased expression of such markers in colitis.
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Affiliation(s)
- P Gibson
- Department of Medicine, University of Melbourne, Royal Melbourne Hospital, Victoria, Australia
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29
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Gibson PR, Folino M, Rosella O, Finch CF, Moeller I, Alexeyeff M, Lindley J, Young GP. Neoplasia and hyperplasia of large bowel: focal lesions in an abnormal epithelium. Gastroenterology 1992; 103:1452-9. [PMID: 1358742 DOI: 10.1016/0016-5085(92)91164-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Expression of brush border hydrolases can reflect the state of differentiation of an epithelium. To determine if expression of these enzymes is disordered in patients with neoplastic or hyperplastic lesions, the activities of alkaline phosphatase, maltase, and dipeptidyl peptidase IV were measured spectrophotometrically in colonoscopic biopsies from the proximal and distal colon and rectum in 50 controls, 17 patients with large bowel adenomas, 29 with carcinoma, and 9 with hyperplastic polyps. In normal controls, a descending cecorectal gradient of alkaline phosphatase activities and an ascending gradient of maltase activities were seen (P < 0.001). Though regional patterns of expression were generally preserved in disease groups, there were significant differences of activities across patient groups for alkaline phosphatase (greater in cancer, adenoma, and hyperplastic groups than in normals; P < 0.05) and for dipeptidyl peptidase IV (greater in hyperplastic polyp group than normals, greater in adenoma than cancer group; P < 0.05). Compared with normal controls, abnormalities of site-specific activities were confined to the rectum in patients with adenoma (maltase decreased, P = 0.02; dipeptidyl peptidase IV increased, P < 0.01) or with carcinoma (alkaline phosphatase increased, P = 0.03) but dipeptidyl peptidase IV activities were increased in all regions in bowels bearing hyperplastic polyps (P < 0.01). These data suggest that neoplastic and hyperplastic lesions, while focal in nature, occur in large bowel epithelium, which is diffusely abnormal in terms of its expression of these enzymes.
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Affiliation(s)
- P R Gibson
- University of Melbourne, Department of Medicine, Royal Melbourne Hospital, Victoria, Australia
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