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Afif W, Arasaradnam RP, Abreu MT, Danese S, Sandborn WJ, Miao Y, Zhang H, Panaccione R, Hisamatsu T, Scherl EJ, Leong RW, Rowbotham DS, Peyrin-Biroulet L, Sands BE, Marano C. Efficacy and Safety of Ustekinumab for Ulcerative Colitis Through 4 Years: Final Results of the UNIFI Long-Term Maintenance Study. Am J Gastroenterol 2024:00000434-990000000-00960. [PMID: 38095692 DOI: 10.14309/ajg.0000000000002621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 11/03/2023] [Indexed: 01/26/2024]
Abstract
INTRODUCTION Ulcerative colitis (UC) is a chronic condition that may require long-term treatment. We report the final efficacy and safety results of the UNIFI long-term extension study of ustekinumab in patients with UC through 4 years. METHODS Ustekinumab induction responders who completed 44 weeks of maintenance treatment and agreed to enter the long-term extension continued their subcutaneous maintenance therapy (90 mg ustekinumab every 8 or 12 weeks [q8w or q12w] or placebo). Starting at week 56, randomized patients could receive dose adjustment to 90 mg q8w. Symptoms and adverse events were assessed through the study; endoscopic assessment was conducted at week 200. RESULTS Of the 348 patients randomized to subcutaneous ustekinumab at maintenance baseline (q8w and q12w combined), 55.2% were in symptomatic remission at week 200. A greater proportion of biologic-naive patients (67.2% [117/174]) were in symptomatic remission than those with a history of biologic failure (41.6% [67/161]). Among patients in symptomatic remission at week 200, 96.4% were corticosteroid-free. Of the 171 patients with endoscopic evaluation at week 200, 81.6% (71/87) in the q12w group and 79.8% (67/84) in the q8w group had endoscopic improvement. From weeks 156 to the final safety visit (up to week 220), no deaths, major adverse cardiovascular events, or tuberculosis occurred in patients receiving ustekinumab. Nasopharyngitis, UC worsening, and upper respiratory tract infections were the most frequently reported adverse events. DISCUSSION The long-term efficacy of ustekinumab maintenance in patients with UC was confirmed through 4 years. No new safety signals were observed. ClinicalTrials.gov number NCT02407236.
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Affiliation(s)
- Waqqas Afif
- Division of Gastroenterology, McGill University Health Centre, Montréal, Québec, Canada
| | - Ramesh P Arasaradnam
- Warwick Medical School, University of Warwick & University Hospital Coventry, Coventry Warwickshire, UK
| | - Maria T Abreu
- University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Silvio Danese
- Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele and University Vita-Salute San Raffaele, Milano, Italy
| | - William J Sandborn
- Division of Gastroenterology, University of California San Diego, La Jolla, California, USA
| | - Ye Miao
- Janssen Research & Development, LLC, Spring House, Pennsylvania, USA
| | - Hongyan Zhang
- Janssen Research & Development, LLC, Spring House, Pennsylvania, USA
| | | | - Tadakazu Hisamatsu
- Department of Gastroenterology and Hepatology, Kyorin University School of Medicine, Tokyo, Japan
| | - Ellen J Scherl
- Weill Cornell Medicine, New York Presbyterian Hospital, New York, New York, USA
| | - Rupert W Leong
- Concord Hospital and Macquarie University Hospital, Sydney, New South Wales, Australia
| | | | - Laurent Peyrin-Biroulet
- Gastroenterology Department and Inserm U954, Nancy University Hospital, Vandœuvre-lès-Nancy, France
| | - Bruce E Sands
- Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Colleen Marano
- Janssen Research & Development, LLC, Spring House, Pennsylvania, USA
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Abreu MT, Rowbotham DS, Danese S, Sandborn WJ, Miao Y, Zhang H, Tikhonov I, Panaccione R, Hisamatsu T, Scherl EJ, Leong RW, Arasaradnam RP, Afif W, Peyrin-Biroulet L, Sands BE, Marano C. Efficacy and Safety of Maintenance Ustekinumab for Ulcerative Colitis Through 3 Years: UNIFI Long-term Extension. J Crohns Colitis 2022; 16:1222-1234. [PMID: 35239968 PMCID: PMC9426670 DOI: 10.1093/ecco-jcc/jjac030] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/01/2022] [Accepted: 03/02/2022] [Indexed: 01/17/2023]
Abstract
BACKGROUND AND AIMS The UNIFI long-term extension [LTE] study reports the efficacy and safety of subcutaneous 90 mg ustekinumab through 3 years of maintenance therapy. METHODS Patients randomised to ustekinumab every 12 weeks [q12w] or every 8 weeks [q8w] at maintenance baseline [N = 348] and randomised ustekinumab-treated patients in the LTE [N = 284] were evaluated. Symptomatic remission [Mayo stool frequency = 0/1, rectal bleeding = 0] was assessed. Safety included all LTE patients [N = 188 placebo and N = 457 ustekinumab]. RESULTS Among patients randomised to the ustekinumab q12w and q8w groups at maintenance baseline, 54.1% and 56.3% achieved symptomatic remission at Week 152, respectively. Overall, 20% of patients discontinued ustekinumab, 10% of biologic-naïve and 30% of biologic-exposed patients. Among patients in symptomatic remission at Year 3, 94.6% and 98.0% of patients were also corticosteroid free, respectively. Corticosteroid-free symptomatic remission rates in the ustekinumab q12w and q8w groups were 51.2% and 55.1% at Week 152, respectively. Remission rates were higher for biologic-naïve patients than for those with a history of biologic failure. Biochemical evidence of response was demonstrated by stable, decreased C-reactive protein and faecal calprotectin measurements over 3 years. From Weeks 96 to 156, no deaths, major adverse cardiovascular events, or tuberculosis occurred. Nasopharyngitis, ulcerative colitis, and upper respiratory tract infection were most frequently reported. One ustekinumab-treated patient with a history of basal cell carcinoma [BCC] reported two BCCs. One patient in the q8w ustekinumab group, who was receiving concomitant 6-mercaptopurine, experienced serious adverse events of neutropenic sepsis and oral herpes. CONCLUSIONS Efficacy of ustekinumab in patients with ulcerative colitis was confirmed through 3 years. No new safety signals were observed.
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Affiliation(s)
- Maria T Abreu
- Corresponding author: Maria T. Abreu, MD, Crohn’s & Colitis Center, 1011 NW 15th Street, [D-149], Gautier Bldg, Ste. 510, Miami, FL 33136, USA. Tel.: 305-243-6404; fax: [305] 243-6125;
| | - David S Rowbotham
- Department of Gastroenterology & Hepatology, Auckland City Hospital, Auckland, New Zealand
| | - Silvio Danese
- Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele and University Vita-Salute San Raffaele, Milano, Italy
| | - William J Sandborn
- Division of Gastroenterology, University of California San Diego, La Jolla, CA, USA
| | - Ye Miao
- Janssen Research & Development LLC., Immunology, Spring House, PA, USA
| | - Hongyan Zhang
- Janssen Research & Development LLC., Immunology, Spring House, PA, USA
| | - Ilia Tikhonov
- Janssen Research & Development LLC., Immunology, Spring House, PA, USA
| | - Remo Panaccione
- Inflammatory Bowel Disease Unit, Division of Gastroenterology and Hepatology, University of Calgary, Calgary, AB, Canada
| | - Tadakazu Hisamatsu
- Department of Internal Medicine, Kyorin University School of Medicine, Tokyo, Japan
| | - Ellen J Scherl
- Jill Roberts Center for Inflammatory Bowel Disease, New York Presbyterian Weill Cornell Medical College, New York, NY, USA
| | - Rupert W Leong
- Gastroenterology and Liver Services Concord Hospital and Department of Gastroenterology Macquarie University Hospital, Sydney, NSW, Australia
| | - Ramesh P Arasaradnam
- Department of Gastroenterology, University Hospital Coventry & Warwickshire NHS Trust, Coventry, UK
| | - Waqqas Afif
- Division of Gastroenterology, McGill University Health Centre, Montreal, QC, Canada
| | - Laurent Peyrin-Biroulet
- University of Lorraine, CHRU-Nancy, Department of Gastroenterology and Nutrition, Genetics, and Environmental Risk Exposure, Nancy, France
| | - Bruce E Sands
- Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Colleen Marano
- Janssen Research & Development LLC., Immunology, Spring House, PA, USA
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Panaccione R, Danese S, Sandborn WJ, O’Brien CD, Zhou Y, Zhang H, Adedokun OJ, Tikhonov I, Targan S, Abreu MT, Hisamatsu T, Scherl EJ, Leong RW, Rowbotham DS, Arasaradnam RP, Sands BE, Marano C. Ustekinumab is effective and safe for ulcerative colitis through 2 years of maintenance therapy. Aliment Pharmacol Ther 2020; 52:1658-1675. [PMID: 33086438 PMCID: PMC8776399 DOI: 10.1111/apt.16119] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 08/11/2020] [Accepted: 10/03/2020] [Indexed: 01/21/2023]
Abstract
BACKGROUND The ongoing UNIFI long-term extension evaluates subcutaneous ustekinumab for moderate-to-severe ulcerative colitis (UC) from weeks 44 through 220. AIMS To assess efficacy (through week 92) and safety (through week 96) during the long-term extension METHODS: Overall, 399 responders to intravenous ustekinumab induction and who were randomised to maintenance therapy were treated in the long-term extension (115 received subcutaneous placebo, 141 received ustekinumab 90 mg every 12 weeks [q12w], and 143 received ustekinumab 90 mg q8w). Placebo treatment was discontinued at unblinding after week 44. Partial Mayo scores were collected every 12 weeks and at each dosing visit after unblinding. Safety was evaluated throughout. RESULTS Among all patients randomised in maintenance, symptomatic remission rates (stool frequency = 0/1; rectal bleeding = 0) at week 92 were, 64.5% and 67.6% in the ustekinumab q12w and q8w groups, respectively. Among randomised patients treated in the long-term extension, 78.7% and 83.2% of patients receiving q12w and q8w, respectively, attained symptomatic remission at week 92; >95% of patients in symptomatic remission at week 92 were corticosteroid-free. Both ustekinumab groups maintained efficacy through week 92. From weeks 44 to 96, adverse events (AEs) per hundred patient-years (PY) of follow-up for combined ustekinumab vs placebo were: 255.68 vs 267.93; serious AEs, 9.34 vs 12.69; malignancies (including non-melanoma skin cancers), 0.93 vs 1.49; and serious infections, 2.33 vs 2.99. One patient with multiple comorbidities who received one ustekinumab dose after dose adjusting from placebo experienced a fatal cardiac arrest. CONCLUSIONS The efficacy of ustekinumab in patients with UC was sustained through 92 weeks. No new safety signals were observed (ClinicalTrials.gov number, NCT02407236).
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Affiliation(s)
| | - Silvio Danese
- Humanitas Clinical and Research Center – IRCCS -and Humanitas University, Department of Biomedical Sciences – Milan, Italy
| | | | | | - Yiying Zhou
- Janssen Research & Development, LLC, Spring House, PA
| | - Hongyan Zhang
- Janssen Research & Development, LLC, Spring House, PA
| | | | - Ilia Tikhonov
- Janssen Research & Development, LLC, Spring House, PA
| | - Stephan Targan
- Inflammatory Bowel and Immunobiology Research Institute, Cedars Sinai Medical Center, Los Angeles, CA
| | - Maria T Abreu
- University of Miami Miller School of Medicine, Miami, FL
| | | | - Ellen J Scherl
- New York Presbyterian Weill Cornell Medical College, New York, NY
| | - Rupert W Leong
- Concord Repatriation General Hospital, Concord, Australia
| | | | | | - Bruce E Sands
- Icahn School of Medicine at Mount Sinai, New York, NY
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Affiliation(s)
- S C Tayal
- Department of Medicine for the Elderly, Ryhope General Hospital, Sunderland
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Bolland MJ, Grey A, Rowbotham DS. Outcomes of bone density measurements in coeliac disease. N Z Med J 2016; 129:40-44. [PMID: 26914297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIM Some guidelines recommend that patients with newly diagnosed coeliac disease undergo bone density scanning. We assessed the bone density results in a cohort of patients with coeliac disease. METHODS We searched bone density reports over two 5-year periods in all patients from Auckland District Health Board (2008-12) and in patients under 65 years from Counties Manukau District Health Board (2009-13) for the term 'coeliac.' RESULTS Reports for 137 adults listed coeliac disease as an indication for bone densitometry. The average age was 47 years, body mass index (BMI) 25 kg/m(2), and 77% were female. The median time between coeliac disease diagnosis and bone densitometry was 261 days. The average bone density Z-score was slightly lower than expected (Z-score -0.3 to 0.4) at the lumbar spine, total hip and femoral neck, but 88-93% of Z-scores at each site lay within the normal range. Low bone density was strongly related to BMI: the proportions with Z-score <-2 for BMI <20, 20-25, 25-30, and >30 kg/m(2) were 28%, 15%, 6% and 0% respectively. CONCLUSIONS Average bone density was normal, suggesting that bone density measurement is not indicated routinely in coeliac disease, but could be considered on a case-by-case basis for individuals with strong risk factors for fracture.
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Affiliation(s)
- Mark J Bolland
- Bone and Joint Research Group, Department of Medicine, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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Vather R, O'Grady G, Arkwright JW, Rowbotham DS, Cheng LK, Dinning PG, Bissett IP. Restoration of normal colonic motor patterns and meal responses after distal colorectal resection. Br J Surg 2016; 103:451-61. [DOI: 10.1002/bjs.10074] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/30/2015] [Accepted: 11/05/2015] [Indexed: 12/12/2022]
Abstract
Abstract
Background
Colorectal resections alter colonic motility, including disruption of control by neural or bioelectrical cell networks. The long-term impact of surgical resections and anastomoses on colonic motor patterns has, however, never been assessed accurately. Fibreoptic high-resolution colonic manometry was employed to define motility in patients who had undergone distal colorectal resection.
Methods
Recruited patients had undergone distal colorectal resections more than 12 months previously, and had normal bowel function. Manometry was performed in the distal colon (36 sensors; 1-cm intervals), with 2-h recordings taken before and after a meal, with comparison to controls. Analysis quantified all propagating events and frequencies (cyclical, short single, and long single motor patterns), including across anastomoses.
Results
Fifteen patients and 12 controls were recruited into the study. Coordinated propagating events directly traversed the healed anastomoses in nine of 12 patients with available data, including antegrade and retrograde cyclical, short single and long single patterns. Dominant frequencies in the distal colon were similar in patients and controls (2–3 cycles/min) (antegrade P = 0·482; retrograde P = 0·178). Compared with values before the meal, the mean(s.d.) number of dominant cyclical retrograde motor patterns increased in patients after the meal (2·1(2·7) versus 32·6(31·8) in 2 h respectively; P < 0·001), similar to controls (P = 0·178), although the extent of propagation was 41 per cent shorter in patients, by a mean of 3·4 cm (P = 0·003). Short and long single propagating motor patterns were comparable between groups in terms of frequency, velocity, extent and amplitude.
Conclusion
Motility patterns and meal responses are restored after distal colorectal resection in patients with normal bowel function. Coordinated propagation across healed anastomoses may indicate regeneration of underlying cellular networks.
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Affiliation(s)
- R Vather
- Department of Surgery, University of Auckland, Auckland, New Zealand
| | - G O'Grady
- Department of Surgery, University of Auckland, Auckland, New Zealand
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - J W Arkwright
- School of Computer Science, Engineering and Mathematics, Flinders University, Adelaide, South Australia
| | - D S Rowbotham
- Department of Gastroenterology and Hepatology, Auckland District Health Board, Auckland, New Zealand
| | - L K Cheng
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - P G Dinning
- Department of Human Physiology, Flinders University, Adelaide, South Australia
- Department of Gastroenterology and Surgery, Flinders Medical Centre, Adelaide, South Australia
| | - I P Bissett
- Department of Surgery, University of Auckland, Auckland, New Zealand
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Eliadou E, Day AS, Thompson-Fawcett MW, Gearry RB, Rowbotham DS, Walmsley R, Schultz M, Inns SJ. New Zealand Society of Gastroenterology Guidelines for the Management of Refractory Ulcerative Colitis. N Z Med J 2015; 128:63-76. [PMID: 26645757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The management of patients with ulcerative colitis who are dependent on corticosteroid for control of symptoms, or refractory to corticosteroids or standard immunosuppressive therapy, is challenging. The development of newer medical therapies has increased the options for managing patients in this situation, but access and funding remain limited. This guideline summarises the literature regarding this situation and provides guidance as to the management of refractory colitis in the New Zealand setting.
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Affiliation(s)
| | | | | | | | | | | | | | - Stephen J Inns
- Hutt Valley DHB IBD Service, Private Bag 31907, Lower Hutt 5040 and Department of Medicine, University of Otago, Wellington, on behalf of IBDNZ.
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Powell N, Hayee BH, Yeoh DPK, Rowbotham DS, Saxena V, McNair A. Terminal ileal photography or biopsy to verify total colonoscopy: does the endoscope agree with the microscope? Gastrointest Endosc 2007; 66:320-5. [PMID: 17643707 DOI: 10.1016/j.gie.2007.02.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [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: 10/07/2006] [Accepted: 02/12/2007] [Indexed: 01/05/2023]
Abstract
BACKGROUND Various modalities exist to document the extent of colonoscopy, including a terminal ileum (TI) biopsy, which is considered the criterion standard by some authorities. A TI biopsy adds to procedure costs, is potentially hazardous, and the detection of pathology in routinely acquired biopsy specimens of a macroscopically normal TI is limited. A safer, less costly alternative for documenting total colonoscopy is desirable. OBJECTIVE To evaluate the effectiveness of TI photography as a means of documenting total colonoscopy. We also assessed the diagnostic yield of TI biopsies in patients with a macroscopically normal TI. DESIGN Prospective, observational study. SETTING District general hospital in the United Kingdom. PATIENTS A total of 232 unselected patients undergoing colonoscopy, TI intubation, photography, and biopsy. MAIN OUTCOME MEASUREMENTS Independent, experienced endoscopists were asked to state whether villi (and, therefore, TI entry) were "definitely," "probably," or "definitely not" depicted in TI photographs. This was compared with TI histology as a means of verifying total colonoscopy. The diagnostic yield of biopsy specimens from a macroscopically normal TI was determined. RESULTS Reviewers agreed that villi were "definitely present" in 93.8%, "probably present" in 5.9%, and "definitely not" present in 0.3% of cases, with excellent interobserver agreement (kappa value = 0.778, P < .0001). TI photographs "definitely" depicting villi (93.8%) did not differ significantly from histology confirming TI mucosa (96.1%, P = .285). Microscopic evidence of pathology was only detectable in 2.3% of patients with an endoscopically normal TI. CONCLUSIONS TI photography is an effective, safe, and cost-effective means of documenting total colonoscopy. Routine biopsy of a "normal" TI has a low diagnostic yield.
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Affiliation(s)
- Nick Powell
- Department of Gastroenterology, Queen Elizabeth Hospital, Woolwich, London, UK
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Abstract
N-acetylcysteine improves survival in established acute liver failure following paracetamol overdose by reducing the incidence of multiorgan failure. These benefits are thought to be related to decreased tissue hypoxia by the enhancement of both oxygen delivery and oxygen extraction. Similar findings have been recorded in critically ill patients from an alternative aetiology. The cardiovascular properties of N-acetylcysteine are to increase stroke volume index, and thus cardiac output, although there is no effect on cardiac output in normal subjects. N-acetylcysteine is known to improve myocardial contraction in a hamster model of chronic myocardial ischaemia, but such effects have not previously been described in humans. We report the beneficial circulatory effect of N-acetylcysteine in a patient with marked left ventricular dysfunction secondary to acute viral myocarditis.
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Affiliation(s)
- D S Rowbotham
- Institute for Liver Studies, King's College Hospital, London, UK
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Abstract
A mycobacterial etiology has been proposed in Crohn's disease (CD). We have sought evidence of increased or modified T lymphocyte immune responses to Mycobacterium tuberculosis and Myco, paratuberculosis in patients with CD (n = 13), compared with ulcerative colitis (UC; n = 17) and controls (n = 17). Peripheral blood cells were cultured with phytohaemagglutinin (positive mitogen control), mycobacterial purified protein derivative (PPD) preparations, lysates, column fractions and whole, heat-killed bacteria. Responses of T cells and T cell subsets were assessed by expression of activation markers (CD25, CD69), coupled with blastogenesis assays (3H-thymidine uptake) and estimates of proliferation. Virtually all patients responded to Myco. paratuberculosis and Myco. tuberculosis antigens. There were no significant differences between patient groups, although there was a very high overall correlation (r = 0.95; P < 0.0001) between responses to the two mycobacterial species. Most of the activation and proliferative responses resided in the CD4+ (T helper) subset. Although up to 15% of CD8+ (suppressor/cytotoxic) cells also became activated, the CD8+ cells did not proliferate subsequently. Cells expressing the alternate gamma delta form of the T cell receptor (TCR gamma delta+) did not activate or proliferate in response to mycobacterial antigens. There were no differences in any of these parameters between patient groups. We conclude that there is no specific increase or alteration in cell-mediated anti-mycobacterial immunity in inflammatory bowel disease (IBD). Thus our data do not support a mycobacterial etiopathology of Crohn's disease.
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Affiliation(s)
- D S Rowbotham
- Division of Medicine, Research School of Medicine, St Jame's University Hospital, Leeds, UK
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Rowbotham DS, Mapstone NP, Trejdosiewicz LK, Howdle PD, Quirke P. Mycobacterium paratuberculosis DNA not detected in Crohn's disease tissue by fluorescent polymerase chain reaction. Gut 1995; 37:660-7. [PMID: 8549942 PMCID: PMC1382871 DOI: 10.1136/gut.37.5.660] [Citation(s) in RCA: 70] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The role of mycobacteria in the aetiology of Crohn's disease has been a contentious subject for many years. Mycobacterium paratuberculosis is known to cause a chronic granulomatous enteritis in animals (Johne's disease) and has been implicated as a possible infectious cause of Crohn's disease. However this fastidious organism is only rarely detected by conventional microbiological techniques. This study used oligonucleotide primers to the species-specific M paratuberculosis IS900 DNA insertion element and the polymerase chain reaction to amplify any M paratuberculosis DNA from intestinal tissue DNA extracts. One oligonucleotide primer was fluorochrome-labelled and the presence of fluorescent amplified product was determined using an automated DNA sequencer with a computerised gel-scanning laser. This method was shown capable of detecting 1-2 mycobacterial genomes. Intestinal tissue samples were obtained from 68 patients with histologically confirmed Crohn's disease, 49 patients with histologically confirmed ulcerative colitis, and 26 non-inflammatory bowel disease controls. In no case was M paratuberculosis detected in any of the inflammatory bowel disease tissue samples and only one non-inflammatory bowel disease case was positive. These results do not support the hypothesis that M paratuberculosis has an aetiological role in Crohn's disease.
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Affiliation(s)
- D S Rowbotham
- Division of Medicine, St James's University Hospital, Leeds
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