scholarly journals OP36 Risankizumab therapy induces improvements in endoscopic endpoints in patients with Moderate-to-Severe Crohn’s Disease: Results from the phase 3 ADVANCE and MOTIVATE studies

2021 ◽  
Vol 15 (Supplement_1) ◽  
pp. S033-S034
Author(s):  
P Bossuyt ◽  
M Ferrante ◽  
F Baert ◽  
S Danese ◽  
B G Feagan ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Clinical Response ◽  
Induction Therapy ◽  
Activity Index ◽  
Inadequate Response ◽  
Biologic Treatment ◽  
Double Blind ◽  
Clinical Endpoints ◽  
Endoscopic Remission

Abstract Background Endoscopic healing has become a critical treatment target in Crohn’s disease (CD). Risankizumab (RZB), a humanized immunoglobulin G1 monoclonal antibody against the p19 subunit of interleukin 23, is being investigated as a treatment for moderate-to-severe CD. This analysis assessed different endoscopic endpoints in patients treated with RZB induction therapy in two double-blind, randomised, placebo (PBO)-controlled studies (ADVANCE [NCT03104413] and MOTIVATE [NCT03105128]). Methods Patients with moderate-to-severe CD (CD Activity Index [CDAI] of 220–450, Simple Endoscopic Score for CD [SES-CD] ≥ 6 [≥ 4 for isolated ileal disease] excluding the narrowing component, and average daily [liquid/very soft] stool frequency [SF] ≥ 4 and/or average daily abdominal pain [AP] score ≥ 2) who had demonstrated prior inadequate response or intolerance to conventional and/or biologic treatment (ADVANCE) or to biologic treatment (MOTIVATE) were randomised 2:2:1 (ADVANCE) or 1:1:1 (MOTIVATE) to receive intravenous (IV) RZB 600 mg, RZB 1200 mg, or PBO at weeks 0, 4, and 8. This analysis evaluated the proportion of patients who achieved endoscopic remission ulcer-free endoscopy (ie, absence of ulcers), and composite endpoints of CDAI clinical response and endoscopic response, and enhanced clinical response and endoscopic response at week 12 (endpoints defined in Figure 1 footnotes). All endoscopies were centrally read by a blinded reviewer. Safety was assessed throughout the studies. Results In ADVANCE and MOTIVATE, 850 and 569 patients, respectively, were randomised and included in the intent-to-treat population for this analysis. At week 12 greater proportions of RZB- vs PBO-treated patients in both studies achieved endoscopic remission (P ≤ .001), ulcer-free endoscopy (P ≤ .01), CDAI clinical response and endoscopic response (P ≤ .001), and enhanced clinical response and endoscopic response (P ≤ .001; Figure 1). Treatment with RZB 600 mg or 1200 mg was well tolerated, and no new safety risks were identified.1,2 Conclusion Induction therapy with IV RZB 600 mg or 1200 mg resulted in improved outcomes at week 12 compared with PBO as assessed by endoscopy and by composite endoscopic-clinical endpoints in patients with moderate-to-severe CD. References

scholarly journals OP26 Risankizumab induces early clinical remission and response in patients with Moderate-to-Severe Crohn’s Disease: Results from the phase 3 ADVANCE and MOTIVATE studies

2021 ◽  
Vol 15 (Supplement_1) ◽  
pp. S026-S027
Author(s):  
S W Schreiber ◽  
M Ferrante ◽  
R Panaccione ◽  
J F Colombel ◽  
T Hisamatsu ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Clinical Response ◽  
Induction Therapy ◽  
Clinical Remission ◽  
Activity Index ◽  
Unmet Need ◽  
Inadequate Response ◽  
Biologic Treatment ◽  
Double Blind

Abstract Background Present therapies leave an unmet need for early and effective treatment for patients with Crohn’s disease (CD). Risankizumab (RZB), a humanized immunoglobulin G1 monoclonal antibody against the p19 subunit of interleukin-23, was evaluated as an induction therapy to induce early clinical remission and response in patients with moderate-to-severe CD in two double-blind, randomized, placebo (PBO)-controlled studies (ADVANCE [NCT03104413] and MOTIVATE [NCT03105128]). Methods Patients with moderate-to-severe CD (CD Activity Index [CDAI] of 220–450, Simple Endoscopic Score for CD [SES-CD] ≥ 6 [≥ 4 for isolated ileal disease] excluding the narrowing component, and average daily [liquid/very soft] stool frequency [SF] ≥ 4 and/or average daily abdominal pain [AP] score ≥ 2) who had inadequate response or intolerance to conventional and/or biologic treatment (ADVANCE), or biologic treatment only (MOTIVATE) were randomised 2:2:1 (ADVANCE) or 1:1:1 (MOTIVATE) to receive intravenous RZB 600 mg, RZB 1200 mg, or PBO as induction therapy at weeks 0, 4, and 8. Clinical remission (per either CDAI or a composite of SF and AP criteria), clinical response (per CDAI criterion), and enhanced clinical response (per a composite of SF and AP criteria) were evaluated at weeks 4, 8, and 12 (endpoints defined in Figure 1 footnotes). Safety was assessed throughout the studies. Results A total of 1419 patients from ADVANCE (N = 850) and MOTIVATE (N = 569) respectively, were randomised and included in the intention-to-treat population. In both studies, starting at week 4 (the first prespecified measurement), greater proportions of RZB 600 mg or RZB 1200 mg- vs PBO-treated patients achieved clinical remission per either CDAI (P = .01/P < .05) or SF/AP criteria (P < .01/P < .01), clinical response per CDAI criterion (P = .001/P < .01), and enhanced clinical response per SF/AP criteria (P < .01/P = .14) (Figure 1). For both RZB 600 mg and RZB 1200 mg, the efficacy and treatment effect increased through week 12 (P ≤ .001/P ≤ .001) (Figure 1). Treatment with RZB 600 mg or 1200 mg was well tolerated, and no new safety risks were identified.1,2 Conclusion Induction therapy with both RZB 600 mg and 1200 mg intravenous resulted in significantly greater clinical remission and response vs PBO as early as week 4 and sustained through week 12 in patients with moderate-to-severe CD who had inadequate response or intolerance to conventional and/or biologic treatment. References

scholarly journals OP23 Efficacy and safety of vedolizumab SC in patients with moderately to severely active Crohn’s disease: Results of the VISIBLE 2 study

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S020-S021
Author(s):  
S Vermeire ◽  
W Sandborn ◽  
F Baert ◽  
S Danese ◽  
T Kobayashi ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Clinical Response ◽  
Clinical Remission ◽  
Maintenance Treatment ◽  
Activity Index ◽  
Study Drug ◽  
Open Label ◽  
Phase 3 ◽  
Double Blind

Abstract Background Vedolizumab (VDZ) is a gut-selective, humanised, monoclonal α 4β 7 integrin antibody for the treatment of patients with moderately to severely active ulcerative colitis (UC) or Crohn’s disease (CD). VDZ is currently an intravenous (IV) therapy; a subcutaneous (SC) formulation is under development to provide patients with an alternative route of administration for maintenance treatment for UC and CD. Here we present the first data from the phase 3 study of VDZ SC maintenance treatment in CD. Methods VISIBLE 2 (NCT02611817; EudraCT 2015-000481-58) was a randomised, double-blind, placebo (PBO)-controlled phase 3 trial of VDZ SC as maintenance treatment in adults with moderately to severely active CD. Patients (n = 644) received open-label VDZ 300mg IV induction therapy at Weeks 0 and 2. At Week 6, clinical responders (defined as patients with a ≥70-point decrease in CD Activity Index [CDAI] from baseline) were randomly assigned to receive vedolizumab SC (108 mg every 2 weeks [Q2W]), or placebo (Q2W) for up to 52 weeks. The primary endpoint was clinical remission at Week 52 (defined as CDAI score ≤150). Rank-ordered secondary endpoints were enhanced clinical response at Week 52 (a drop of ≥100 in CDAI score), corticosteroid (CS)-free clinical remission at Week 52, and clinical remission at Week 52 in anti-tumour necrosis factor (TNF)-naïve patients. Finally, VDZ immunogenicity and predefined adverse events of special interest were assessed. Results Patients who responded to VDZ IV induction at Week 6 (n = 409) were randomised to VDZ SC (n = 275) or PBO (n = 134) maintenance and received at least 1 dose of study drug; 61% and 53%, respectively, were previously exposed to anti-TNF therapy. At Week 52, 48.0% of patients on VDZ SC vs. 34.3% on PBO were in clinical remission (p = 0.008, Figure). Enhanced clinical response at Week 52 was reached by 52.0% vs. 44.8% of patients on VDZ SC vs. PBO, respectively (p = 0.167). Among patients on concomitant CS at baseline (VDZ SC, n = 95; PBO, n = 44), 45.3% receiving VDZ SC vs. 18.2% receiving PBO achieved CS-free clinical remission at Week 52. Of anti-TNF-naïve patients (VDZ SC, n = 107; PBO, n = 63), 48.6% vs. 42.9% were in clinical remission at Week 52 in the VDZ SC and PBO arms, respectively. Injection-site reactions were reported for <3% of patients treated with VDZ SC. Serious infections, malignancy, and liver injury were ≤5% for both arms. Anti-VDZ antibodies were detected in 7 (2.5%) patients treated with VDZ SC arm; 4 of 7 patients developed neutralising antibodies. No new safety signals were observed. Conclusion Among VDZ IV induction responders, significantly more patients on maintenance VDZ SC than PBO achieved clinical remission at Week 52. The safety findings with VDZ SC remain in line with the known safety profile of VDZ IV in patients with CD.

scholarly journals DOP88 Effect of risankizumab on patient-reported outcomes in patients with Crohn’s Disease who had an inadequate response or intolerance to conventional and/or biologic treatments: Results from phase 3 MOTIVATE and ADVANCE trials

2021 ◽  
Vol 15 (Supplement_1) ◽  
pp. S119-S121
Author(s):  
L Peyrin-Biroulet ◽  
E Louis ◽  
S Ghosh ◽  
S D Lee ◽  
J Griffith ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Induction Therapy ◽  
Patient Reported Outcomes ◽  
Short Form ◽  
Inadequate Response ◽  
Phase 3 ◽  
Biologic Treatment ◽  
Sf 36 ◽  
Patient Reported

Abstract Background Risankizumab (RZB), an IL-23 inhibitor, is being investigated for Crohn’s disease (CD). MOTIVATE (NCT03105128) and ADVANCE (NCT03104413) were two double-blind, randomised, placebo (PBO)-controlled phase 3 trials evaluating the efficacy and safety of RZB as induction therapy for CD after inadequate response or intolerance to biologic treatment, or conventional or biologic treatment. We investigated the effect of RZB on patient-reported outcomes (PROs) in these two trials. Methods Patients with moderately to severely active CD (CD activity index of 220–450, Simple Endoscopic Score for CD excluding the narrowing component ≥ 6 or ≥ 4 for isolated ileal disease, and average daily stool frequency ≥ 4 and/or average daily abdominal pain score ≥ 2) were randomised 1:1:1 (MOTIVATE; N=569) or 2:2:1 (ADVANCE; N=850) to intravenous RZB 600 mg, RZB 1200 mg or PBO at Weeks 0, 4 and 8. PROs assessed were Inflammatory Bowel Disease Questionnaire (IBDQ), Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F), and 36-Item Short Form Health Survey (SF 36). Least-squares mean change from baseline to Week 4 and 12 were assessed for each PRO. Additionally, the proportion of patients achieving IBDQ remission (IBDQ total score ≥ 170 points) was evaluated. Comparisons between RZB dosage groups and PBO were based on Cochran-Mantel-Haenszel or chi-square/Fisher’s exact tests; missing data were reported using non-responder imputation. Results In the MOTIVATE (100% biologic inadequate responder [bio-IR]) and ADVANCE (57% bio-IR) trials, significant (P<0.05) improvements in nearly all PROs evaluated were seen as early as Week 4 (Figures 1–4). At Week 12, significant improvements in all PROs were reported for both doses of RZB compared with PBO in both trials, except for the SF-36 Mental Component Summary score (RZB 1200 mg in MOTIVATE), which improved, but not significantly. In MOTIVATE, at Week 4 and 12, IBDQ remission was achieved by significantly (P<0.05) more patients taking RZB (600 mg, 25.1%/38.3%; RZB 1200 mg, 31.9%/44.6%) than PBO (15.5%/26.8%). Results were similar in ADVANCE: RZB 600 mg 30.9%/44.5%, RZB 1200 mg 33.7%/51.5%, and PBO 18.4%/29.8% at weeks 4 and 12, respectively (P<0.001 for both RZB groups compared to PBO). Conclusion Patients with active CD and an inadequate response to conventional or biologic treatment who received RZB (600 mg or 1200 mg) induction therapy reported significant improvements in disease-specific (IBDQ) and general health-related PROs (FACIT and SF-36) compared with PBO, with improvements seen as early as Week 4. Funding statement: Study was funded by AbbVie. Acknowledgement: Medical writing support was provided by Joann Hettasch of Fishawack Facilitate Ltd, and was funded by AbbVie.

scholarly journals Vedolizumab in Combination With Corticosteroids for Induction Therapy in Crohn’s Disease: A Post Hoc Analysis of GEMINI 2 and 3

2019 ◽  
Vol 25 (8) ◽  
pp. 1375-1382 ◽  
Author(s):  
Bruce E Sands ◽  
Gert Van Assche ◽  
David Tudor ◽  
Gamar Akhundova-Unadkat ◽  
Rebecca I Curtis ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Clinical Response ◽  
Induction Therapy ◽  
Activity Index ◽  
Combined Therapy ◽  
Disease Activity Index ◽  
Efficacy And Safety ◽  
Post Hoc Analysis ◽  
Post Hoc

Abstract Background Combined therapy with vedolizumab and corticosteroids may improve clinical response or remission in Crohn’s disease. The aim of this study is to assess efficacy and safety/tolerability of vedolizumab plus stable doses of corticosteroids at baseline during induction therapy in moderately to severely active Crohn’s disease. Methods A post hoc exploratory analysis was performed on data from GEMINI 2 (NCT00783692) and GEMINI 3 (NCT01224171), which assessed outcomes following induction therapy over 6- and 10-week periods, respectively. Patients receiving vedolizumab or placebo were stratified by corticosteroid use at baseline. Efficacy endpoints were clinical remission (CR; Crohn’s Disease Activity Index [CDAI] score ≤150 points) and enhanced clinical response (ECR; decrease of ≥100 points in CDAI score from baseline), assessed at week 6 (GEMINI 2 and GEMINI 3) and week 10 (GEMINI 3). Safety endpoints included the incidence of adverse events. Results Vedolizumab plus corticosteroids resulted in higher CR rates than placebo plus corticosteroids at week 6 in GEMINI 2 and at week 6 and week 10 in GEMINI 3. More patients receiving vedolizumab plus corticosteroids achieved CR at week 6 in GEMINI 2 and at week 10 in GEMINI 3 than patients receiving vedolizumab alone. Vedolizumab plus corticosteroids also resulted in significantly higher ECR rates than placebo plus corticosteroids at all timepoints in both studies. More patients receiving vedolizumab plus corticosteroids achieved higher ECR rates at week 6 in GEMINI 2 and at week 10 in GEMINI 3 than patients receiving vedolizumab alone. Adverse event incidence was similar across groups. Conclusions Vedolizumab in combination with stable doses of corticosteroids at baseline may improve induction of clinical response or remission in moderately to severely active Crohn’s disease. Trial registration numbers NCT00783692, NCT01224171.

Outcomes of Passable and Non-passable Strictures in Clinical Trials of Crohn’s Disease: A Post-hoc Analysis

2021 ◽  
Author(s):  
Neeraj Narula ◽  
Emily C L Wong ◽  
Parambir S Dulai ◽  
John K Marshall ◽  
Jean-Frederic Colombel ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Activity Index ◽  
Disease Activity Index ◽  
Symptom Improvement ◽  
Logistic Regression Models ◽  
Post Hoc Analysis ◽  
Endoscopic Remission ◽  
Post Hoc ◽  
The Impact

Abstract Background and Aims There is paucity of evidence on the reversibility of Crohn’s disease [CD]-related strictures treated with therapies. We aimed to describe the clinical and endoscopic outcomes of CD patients with non-passable strictures. Methods This was a post-hoc analysis of three large CD clinical trial programmes examining outcomes with infliximab, ustekinumab, and azathioprine, which included data on 576 patients including 105 with non-passable strictures and 45 with passable strictures, as measured using the Simple Endoscopic Score for Crohn’s Disease [SES-CD]. The impact of non-passable strictures on achieving clinical remission [CR] and endoscopic remission [ER] was assessed using multivariate logistic regression models. CR was defined as a Crohn’s Disease Activity Index [CDAI] <150, clinical response as a CDAI reduction of ≥100 points, and ER as SES-CD score <3. Results After 1 year of treatment, patients with non-passable strictures demonstrated the ability to achieve passable or no strictures in 62.5% of cases, with 52.4% and 37.5% attaining CR and ER, respectively. However, patients with non-passable strictures at baseline were less likely to demonstrate symptom improvement compared with those with passable or no strictures, with reduced odds of 1-year CR (adjusted odds ratio [aOR] 0.17, 95% CI 0.03–0.99, p = 0.048). No significant differences were observed between patients with non-passable strictures at baseline and those with passable or no strictures in rates of ER [aOR 0.82, 95% CI 0.23–2.85, p = 0.751] at 1 year. Conclusions Patients with non-passable strictures can achieve symptomatic and endoscopic remission when receiving therapies used to treat CD, although they are less likely to obtain CR compared with patients without non-passable strictures. These findings support the importance of balancing the presence of non-passable strictures in trial arms.

scholarly journals Short-term tolerability and effectiveness of methotrexate monotherapy in adult patients with Crohn’s disease: a retrospective study

2021 ◽  
Vol 14 ◽  
pp. 175628482110430
Author(s):  
Hee Seung Hong ◽  
Kyuwon Kim ◽  
Kyunghwan Oh ◽  
Jae Yong Lee ◽  
Seung Wook Hong ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Oral Administration ◽  
Clinical Response ◽  
Activity Index ◽  
Medical Center ◽  
Retrospective Chart Review ◽  
Asian Population ◽  
Aminosalicylic Acid ◽  
Parenteral Injection

Introduction: Immunomodulators remain fundamental for the medical treatment of Crohn’s disease (CD). Methotrexate (MTX) is widely used as a second-line immunomodulator; however, there is a lack of recent data on MTX monotherapy among the Asian population with CD. Therefore, in this study, we aimed to investigate the tolerability and clinical outcomes of MTX in Korean patients with CD. Methods: A retrospective chart review was performed for CD patients treated with MTX monotherapy or in combination with 5-aminosalicylic acid (5-ASA), at the Asan Medical Center, Seoul, South Korea. The tolerability of MTX monotherapy within 6 months was assessed and the clinical effectiveness of MTX was evaluated based on the Crohn’s disease activity index (CDAI). Results: In total, 85 patients were included, of which 29 (34.1%) discontinued MTX due to intolerability during the follow-up. Adverse events (AEs) were reported in 41 (48.2%) patients. The most common AE was gastrointestinal disorders (17/41) and only one patient experienced a serious AE, a systemic infection that required hospitalization. Among the 56 patients who tolerated MTX within 6 months, 44 (65.9%) showed a clinical response. Moreover, no factor was significantly associated with intolerability. The administration method was the only factor significantly associated with a response to MTX ( p = 0.041). The adjusted odds ratio of parenteral injection compared to oral administration was 5.68 (95% confidence interval (CI), 1.07–30.08). Conclusion: In this study, one-third of patients were intolerant to MTX; nonetheless, the response rate was as high as 65.9% among tolerant patients. In addition, no significant factors affected intolerability. In terms of the clinical response, parenteral injection could be better than oral administration.

DOP71 Efficacy, safety, and tolerability of ustekinumab in paediatric patients with moderately to severely active Crohn’s disease: Results from, UniStar, a phase 1 study

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S107-S108
Author(s):  
J Rosh ◽  
D Turner ◽  
A Griffiths ◽  
D Jacobstein ◽  
O Adedokun ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Opportunistic Infections ◽  
Activity Index ◽  
Phase 1 ◽  
Double Blind ◽  
Faecal Calprotectin ◽  
Adequate Treatment ◽  
Safety And Efficacy ◽  
Paediatric Patients

Abstract Background Ustekinumab (UST) is approved for the treatment of adults with moderate to severe Crohn’s disease (CD). The objective of this study was to evaluate the pharmacokinetics (PK), safety, and efficacy of UST in paediatric patients with moderately to severely active CD who had failed treatment with corticosteroids (CS) and/or immunomodulators (IM) and/or anti-tumour necrosis factor (TNF) therapies. Here, we report the safety and efficacy results through Week 16; PK results are reported separately. Methods This was a Phase 1, multicentre, 16-week, double-blind induction dose-ranging study (NCT02968108) in patients aged 2 to <18 years (body weight [BW] ≥10 kg) with a Paediatric CD Activity Index (PCDAI) score >30 and at least an abnormal C-reactive protein >3.0 mg/l or faecal calprotectin >250 µg/g), or ulcerations in the ileum or colon upon ileocolonoscopy despite adequate treatment with CS ± IM ± anti-TNF therapy. Patients were randomised (1:1) and stratified by weight and prior anti-TNF use for induction to one of 2 weight range-based intravenous (IV) doses: 130mg vs. 390 mg if BW ≥40 kg and 3 mg/kg vs. 9 mg/kg if BW <40 kg. At week 8, all patients received a single subcutaneous (SC) UST maintenance dose of 90mg if BW ≥40 kg or 2 mg/kg if BW <40 kg. Results Forty-four patients (59% ≥40kg BW; >90% anti-TNF exposed) were randomised (n = 23 lower dose; n = 21 higher dose) and treated with UST. Baseline characteristics are summarised in Table 1. At week 16, in the lower dose and higher dose groups, 52%/52% achieved clinical response (reduction in PCDAI ≥15) and 22%/29% had clinical remission (PCDAI ≤10), respectively (Table 2). In addition, 32% and 28% of patients showed endoscopic response (reduction in Simple Endoscopic Score for CD of ≥50%), respectively. Through week 16, 73% of patients reported ≥1 adverse event (AE; 82.6% lower dose vs. 62% higher dose); 2 discontinued due to AEs (1 in each group). Serious AEs occurred in 16% of patients (26% lower dose and 5% higher dose, with CD exacerbation being the most frequent (13%/5%, respectively). Infections occurred in 41% of patients (1 was serious, which was intestinal abscess that spontaneously resolved with sequelae). No injection site reactions, opportunistic infections, malignancies, or deaths were reported. No antibodies to UST were observed. Conclusion As early as 3 weeks and through 16 weeks, both the lower and higher doses of UST (IV week 0 and SC at week 8) improved clinical and endoscopic disease activity in this previously treatment-refractory group of children with CD. The safety profile was consistent with that for UST in adults with CD.

scholarly journals Fine and ultrafine particles of the diet: influence on the mucosal immune response and association with Crohn’s disease

2002 ◽  
Vol 61 (1) ◽  
pp. 123-130 ◽  
Author(s):  
Miranda C. E. Lomer ◽  
Richard P. H. Thompson ◽  
Jonathan J. Powell
Keyword(s):  
Crohn’S Disease ◽  
Gastrointestinal Tract ◽  
Crohn's Disease ◽  
Immune Responses ◽  
Ultrafine Particles ◽  
Activity Index ◽  
Food Additives ◽  
Disease Activity Index ◽  
Mucosal Immune Response ◽  
Double Blind

Crohn’s disease is a modern Western disease characterised by transmural inflammation of the gastrointestinal tract. It is of unknown aetiology, but evidence suggests that it results from a combination of genetic predisposition and environmental factors. Bacterial-sized microparticles (0·1–1·0 µm) are potent adjuvants in model antigen-mediated immune responses and are increasingly associated with disease. Microparticles of TiO2 and aluminosilicate accumulate in macrophages of human gut-associated lymphoid tissue where the earliest signs of lesions in Crohn’s disease are observed. Dietary microparticles are of endogenous or exogenous origin. Endogenous microparticles dominate and are calcium phosphate (most probably hydroxyapatite), which precipitates in the lumen of the mid-distal gastrointestinal tract due to secretion of Ca and phosphate in the succus entericus. Exogenous dietary microparticles are contaminants (soil and/or dust) and food additives. TiO2, for example, is a food colourant, and aluminosilicates are anti-caking agents, although some aluminosilicates occur as natural contaminants. Food additives alone account for ingestion of approximately 1012 particles/person per d. Possible mechanisms for the role of exogenous and endogenous dietary microparticles in promoting toleragenic or immune responses of gastrointestinal mucosal phagocytosis are discussed. In a double-blind randomised pilot study we have shown that a diet low in Ca and exogenous microparticles appears to alleviate the symptoms of ileal Crohn’s disease, with a significant (P = 0·002) improvement in the Crohn’s disease activity index. A multi-centre trial and further mechanistic studies at the cellular level are underway.

scholarly journals P329 ECCO grant recipient: preliminary results of the HOT-TOPIC trial (Hyperbaric Oxygen Therapy for the Treatment Of Perianal fistulas In Crohn’s disease)

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S318-S319
Author(s):  
C Lansdorp ◽  
K Gecse ◽  
C Buskens ◽  
M Löwenberg ◽  
J Stoker ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Adverse Events ◽  
Clinical Response ◽  
Hyperbaric Oxygen ◽  
Activity Index ◽  
Perianal Disease ◽  
Faecal Calprotectin ◽  
Preliminary Results ◽  
Patient Reported

Abstract Background Beneficial effects of hyperbaric oxygen (HBO) therapy for perianal fistulising Crohn’s disease (pCD) have been suggested in previous publications. The HOT-TOPIC study was designed to further investigate its feasibility and therapeutic effect in 20 therapy-refractory patients with pCD. Here we present the preliminary results. Methods 17 patients with pCD refractory to conventional-therapy > 6 months (medical and/or surgical, no patients with deviating stoma) were treated with 40 sessions of HBO therapy (243–253 kPa, 110 min per session throughout 8 weeks). Medical treatment remained stable from screening, seton drain(s) were removed after 30 treatment. Co-primary outcomes were clinical response as measured by the perianal disease activity index (PDAI) and MRI improvement measured by the modified van Assche index. Secondary outcomes were clinical response as assessed by fistula drainage assessment (FDA), biochemical response and patient-reported outcomes. All outcomes were assessed at baseline and 2 months after HBO. Results 17 patients (6 female, median age 34 years, median duration of disease 13 years) were treated. Median PDAI scores decreased from 8 to 4 (p < 0.001) and MRI scores from 9.4 to 7.3 (p = 0.001). Defined as PDAI of 4 or less, 11 out of 17 patients had inactive perianal disease after treatment, with 3 patients also having a predominantly fibrotic tract on MRI. Of the 45 external openings draining at baseline, 22 were clinically closed after treatment (49%, assessed by FDA). Four patients, three with one external opening and one with five openings at baseline, had no remaining openings after treatment. Median C-Reactive Protein and faecal calprotectin levels decreased from 5.0 and 416 to 2.3 and 31 (p = 0.002 and p = 0.003), respectively. Median scores of the inflammatory bowel disease questionnaire (IBDQ) increased from 169 to 185 (p = 0.001) and VAS scores from the Euroqol-5-dimensions questionnaire increased from 65 to 75 (p = 0.07), higher scores reflecting better quality of life. When asked on a validated decision regret scale if patients regretted their decision to undergo HBO, the mean score was 12.5 (0–100, higher scores indicating higher regret). During follow-up, none of the patients needed new (experimental) medication, re-interventions or stoma. Seven out of 17 patients experienced trouble equalising middle ear pressure during HBO, with four patients showing signs of barotrauma after otoscopy. Three patients needed tympanostomy tubes. No other clinically relevant adverse events occurred, and no adverse events led to discontinuation of the treatment. Conclusion Based on preliminary data, HBO treatment is associated with significant improvement in pCD, as measured by clinical and MRI endpoints.

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