Rectal Tacrolimus in the Treatment of Resistant Ulcerative Proctitis

This study is currently recruiting participants. (see Contacts and Locations)
Verified November 2012 by The University of Western Australia
Sponsor:
Collaborators:
Mater Health Services' Adult Hospital, Brisbane
Concord Hospital
The Canberra Hospital
Royal Prince Alfred Hospital, Sydney, Australia
Information provided by (Responsible Party):
Ian Lawrance, The University of Western Australia
ClinicalTrials.gov Identifier:
NCT01418131
First received: August 15, 2011
Last updated: November 8, 2012
Last verified: November 2012
  Purpose

Ulcerative Colitis (UC) is a life-long incurable disease with remissions and exacerbations. Inflammation confined to the rectum occurs in a quarter of patients and can be extremely hard to treat. Many medications have been tried in order to control the inflammation, but they do not always work. One of the newer medications is the immunosuppressing medication, tacrolimus that has been shown to be effective in UC when taken orally. Unfortunately, the oral use of this medication can have numerous serious side effects. In order to overcome these side effects, the use of topical rectal tacrolimus has been examined. Pilot studies in ulcerative proctitis (inflammation confined to the rectum) resistant to conventional therapies have demonstrated a clinical remission in 75% of patients and although the medication was well absorbed through the lining of the bowel, the levels in the blood were very low and no serious side effects were reported. The findings suggest that this preparation is indeed effective for inflammation in the distal bowel and that the method of administration reduces side effects. Further work, however, now needs to be undertaken to validate the original findings.


Condition Intervention Phase
Ulcerative Colitis
Drug: Rectal tacrolimus
Drug: Placebo
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Multi-centre Double Blind Randomised Placebo-controlled Study of the Use of Rectal Tacrolimus in the Treatment of Resistant Ulcerative Proctitis

Resource links provided by NLM:


Further study details as provided by The University of Western Australia:

Primary Outcome Measures:
  • Clinical response [ Time Frame: 8 weeks ] [ Designated as safety issue: No ]
    Clinical response (Mayo Score) of resistant ulcerative proctitis after 8 weeks of rectal tacrolimus therapy


Secondary Outcome Measures:
  • Remission rates [ Time Frame: 8 weeks ] [ Designated as safety issue: No ]
    Remission rates (Mayo Score) of resistant ulcerative proctitis after 8 weeks of rectal tacrolimus

  • Mucosal Healing [ Time Frame: 8 weeks ] [ Designated as safety issue: No ]
    Effect of rectal tacrolimus on mucosal healing after 8 weeks of therapy

  • Changes in the Mayo Score [ Time Frame: 8 weeks ] [ Designated as safety issue: No ]
    Changes in the modified Mayo Score between tacrolimus and control groups over 8 weeks of therapy

  • Quality of Life [ Time Frame: 8 weeks ] [ Designated as safety issue: No ]
    Changes in quality of life by the Inflammatory Bowel Disease Questionnaire (IBDQ) between tacrolimus and control groups over 8 weeks of therapy

  • Safety and tolerability [ Time Frame: 8 weeks ] [ Designated as safety issue: Yes ]
    Safety and tolerability of rectal tacrolimus over 8 weeks of therapy

  • Cytokine Expression [ Time Frame: 8 weeks ] [ Designated as safety issue: No ]
    Changes in cytokine expression in mucosal biopsies following rectal tacrolimus therapy


Estimated Enrollment: 50
Study Start Date: October 2012
Estimated Study Completion Date: November 2013
Estimated Primary Completion Date: September 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Rectal tacrolimus
Active medications - Rectal tacrolimus made as an ointment at a concentration of 0.5mg/ml 3mls will be applied rectally twice a day
Drug: Rectal tacrolimus
Rectal tacrolimus made as an ointment at a concentration of 0.5mg/ml with 3 mls will be applied rectally twice a day
Other Name: calcineurin inhibitor
Placebo Comparator: Rectal Placebo
Placebo 3ml applied rectally twice a day. Identical to Interventional agent expect for the lack of tacrolimus
Drug: Placebo
Placebo
Other Name: Control Arm

  Hide Detailed Description

Detailed Description:

The Inflammatory Bowel Diseases (IBDs) are life-long conditions often diagnosed between 15 and 35 years of age that are increasing in frequency. In developed countries, IBD prevalence was about 100-220/100,000 in 2002. More recently the estimated prevalence of CD and UC in the USA are 201 and 238 per 100,000 respectively. This indicates more than 620,000 CD and 730,000 UC patients in the USA alone. It has also been noted that the incidence of IBD has been increasing in the ethnic minorities in American over the last two decades and it is predicted that IBD, which was previously thought of as a 'Caucasian disease', will reach a comparable levels in Asia as in the Western Countries within 10-15 years. One of the major costs in IBD treatment is the need for a hospital admission. These have been falling for CD patients secondary to the increasing use of the biological therapies, however, admissions for UC have doubled over the last 15 years. IBD now costs the Australian economy of 22,000,000 people over $2.7 billion annually and this is comparable throughout the western World.

Tacrolimus and cyclosporin are classical calcineurin inhibitors and are widely used as immunosuppressive medications with promising results in UC. Calcineurin, or protein phosphatase 2B (PP2B), is a ubiquitously expressed cytosolic Ser/Thr protein phosphatase, that is highly conserved in eukaryotes. It has the ability to dephosphorylate a broad range of proteins and can regulate interleukin (IL)-2, IL-4 and interferon (IFN)γ expression, as well as modulating the activity of transcription factors like NF-κB. Enhanced NF-kB activity is well described in CD and UC and induces the proinflammatory cytokine IL-1β, IL-6 and TNFα expression. It is primarily through the reduction in the levels of these cytokines that clinical remission may be achieved.

The efficacy of oral tacrolimus has been examined in the management of medication resistant CD and UC. Unfortunately, the majority of these studies have been open labelled with only one randomised controlled trial reported in UC. This demonstrated a short-term clinical improvement but without a significant increase in the remission rate, potentially due to low patient numbers. Despite this, there are numerous open labelled studies in both UC and CD that suggest efficacy in the short term and with promising longer term data. The evidence would suggest, however, that the blood trough level should be at least 10ug/L in order to achieve the best efficacy (therapeutic range 5-20ug/L), but the higher the trough level the more likely a patient will suffer an adverse effect. These, unfortunately, can be numerous and include hypertension, nausea and diarrhoea, haematological abnormalities, renal impairment. Increase in the rate of skin cancers is also a concern, a concern supported by animal studies.

Use of topical tacrolimus has been effective in the treatment of perioral and perineal inflammation in paediatric CD patients with resolution of symptoms in 75%. Work examining topical perianal tacrolimus therapy in adult CD patients also demonstrated clinical efficacy, and although tacrolimus is absorbed well transdermally, only low trough levels of tacrolimus were detected in the blood. In these preliminary studies, the use of topical tacrolimus was associated with very few side effects. Long-term topical use, as with oral formulations, may be associated with an increased risk of skin cancer formation. Epidemiological evidence, however, would suggest that the risk is low and localised to the tacrolimus-treated sun-exposed skin.

The recent pilot study by our group demonstrated that 75% (6/8) of patients with resistant distal colitis responded and achieved a remission of their disease following 4 and 8 weeks of tacrolimus rectal ointment8. A dose of 0.3 to 0.5mg/ml 3ml twice a day was identified in the majority of patients to induce remission. In these patients tacrolimus trough levels were taken regularly and were either undetectable (<1.5 μg/L) sub-therapeutic (<5 μg/L) or, at their highest, in the low therapeutic range (therapeutic range 5-20 μg/L). The ointment was well tolerated without any systemic adverse effects. Use of the same rectal tacrolimus preparation in further 8 patients was also associated with a clinical response in 6 patients after 4 weeks of therapy.

The efficacy of topical tacrolimus in UC is further supported by a separate pilot study that examined topical tacrolimus in patients with resistant distal colitis. In this study a clinical and histological improvement in 10 of 12 patients by 4 weeks without any major side effects reported and the preparation was well tolerated.

METHODOLOGY

Study medication and supply: Fremantle Hospital pharmacy will prepare the tacrolimus/placebo ointment and will ship to each centre. Four weeks of medication/placebo will be shipped to each site on the successful screening and randomisation of each patient. The second 4 weeks of medication/placebo will be shipped 3 weeks following the week 0 visit.

Medication Stability: The cream expires after 30 days at room temperature or 90 days at 4-8 0C

Administration of the study medication: A total of 3ml of the study medication or placebo will be applied rectally, via an applicator, twice a day by the patient over the 8-week period. The application will take place prior to retiring to bed and following breakfast in the morning. For shift workers application will occur just prior to retiring to bed and following the first meal of the day.

Dosage schedule:

  1. Randomisation: Patients will be randomly assigned in a 1:1 ratio to receive the tacrolimus or placebo.
  2. Blinding: The trial patients and the clinical investigators will be blinded to the randomisation.

Concomitant therapy: Rectal preparation will be ceased a week prior to commencing the trial. Patients will be continued on the same oral medications they are on at commencement of the study.

Screening visit: All patients will sign informed consent prior to any data collection. Patient demographics will be recorded. Stool culture and microscopy, blood pressure (BP), full blood count (FBC), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), urea,electrolytes (U&E) and GFR will be taken and measured locally at each site. Results of these tests will be faxed through to the central site at Fremantle hospital within 3 days of collection for review. Faecal calprotectin will be taken and stored at -200C. These specimens will be sent in batches on dry ice every 3 months to the central site at Fremantle Hospital for analysis.

Within 7 days prior to week 0 a flexible sigmoidoscopy will be performed. Two sets of photos will be taken at endoscopy one set distal (within 15cm of the anus) and one set proximal (15-25cm from the anus). The region depicting the worse level of inflammation will 2 biopsies will be taken from each region for histological analysis. Biopsies will be fixed and blocked at each hospital site. All the paraffin blocks will be sent to Fremantle Hospital be noted. Following the photos for histological analysis. Four additional biopsies will be taken from each region for RNA isolation. The biopsies from each region will be placed immediately into 2 tubes labelled 'proximal' and 'distal' containing RNAlater and stored at -80oC. These will then be sent in batches on dry ice every 3 months to the central site at Fremantle Hospital for analysis. A full Mayo score will calculated to confirm the presence of active UC (Mayo score between 6 and 12 required for inclusion).

Week 0: A Mayo score will be calculated using the screening endoscopic findings and treatment initiated. Baseline IBDQ calculated and BP measured Weeks 2, and 4: A modified Mayo score will be calculated, BP taken, and FBC, ESR, CRP, U&E as described above and the IBDQ assessed. The faecal calprotectin will be taken and stored at -200C. Blood for the tacrolimus trough will be taken, the serum collected and this will be stored at -20oC. The serum will then be sent on dry ice to the central site at Fremantle Hospital for assessment within 2 days of collection. The medical monitor (CIA) at Fremantle Hospital will review all the tacrolimus trough levels to ensure patient safety.

Week 8 or withdrawal: A flexible sigmoidoscopy will be undertaken ± 3 days of the week 8 visit (or at early withdrawal) and a full Mayo score calculated. Photos and biopsies will be taken and processed as detailed at the screening sigmoidoscopy. Routine FBC, U&E, ESR, CRP, BP measured, and faecal calprotectin as described above Week 12: Follow-up phone call to assess any adverse events. Each histological specimen will be assessed centrally at Fremantle Hospital by a blinded specialist gastroenterological histopathologist. These findings will be correlated with the endoscopic scoring and photos taken at endoscopy.

Early withdrawal from the study: Patients are free to withdraw from the study at any time. If the patient is withdrawing due to lack of efficacy of the study preparation 4 weeks or more following the week 0 visit, they will be eligible for open label use topical tacrolimus ointment for 4 weeks. A withdrawal flexible sigmoidoscopy will be required prior to the supply of the topical tacrolimus ointment. Photos will be taken prior to the biopsies as described for the week 0 and 8 procedures. Routine FBC, U&E, ESR, CRP, BP measured, tacrolimus trough levels and faecal calprotectin will be taken after 2 weeks of therapy as described above.

Interim Analysis: An interim analysis by an independent statistician after 20 patients have completed the 8-week visit will be done to confirm the drug safety and shall be requires to allow the study to continue.

mRNA expression levels: Biopsies (x4) taken from two regions for the distal colon (within 15cm of the anus and 15-25cm from the anus). The region containing the worse inflammation seen on endoscopic examination at weeks 0 and 8 (or at early withdrawal) will have been noted. All samples will have been immediately placed in RNA later and stored at -800C prior to transfer on dry ice to the central site at Fremantle Hospital. Levels of TNFα, IFN-γ, IL-1β, IL-2, IL4, IL-10 and IL-6 mRNA expression will be determined on each group of samples. Total RNA will be isolated and DNase-treated using the Qiagen 96 RNeasy® kit (Qiagen, Clifton Hill, Australia) according to the manufacturer's instructions. The quality of the RNA samples will be verified, reverse transcription performed and cDNA quantitated by real-time PCR using QuantiTect SYBR Green Master Mix (Qiagen) on the ABI PRISM 7900HT (Applied Biosystems). Specific primers for the mRNAs will be used. Dissociation curve analysis will confirm specificity of amplification and copy numbers will be determined from plasmid or PCR product standard curves. Target mRNA copy numbers will be normalised against reference gene copy number for each cDNA sample. The above methods are already available in CIA's laboratory at Fremantle Hospital. The limit of mRNA detection is 3pg/ml for all cytokines Statistical analysis: Comparisons between the mRNA expression in endoscopic biopsies taken at weeks 0 and 8 (or at withdrawal) in the tacrolimus treatment arm will undertaken and compared with each other and against those from the placebo control arm at the same time points. The mRNA expression levels will be correlated with the endoscopic and histological inflammatory scores. Differences between the groups will be assessed using one-way ANOVA on log-transformed data. Statistical analysis will be conducted using the Statistical Package for the Social Sciences (SPSS) version 17. Statistical significance is considered as p<0.05 for all analyses.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  1. Is able to provide informed consent.
  2. Is over the age of 18 years
  3. Has a diagnosis of ulcerative colitis of over 3 months duration that was confirmed by a specialist gastroenterologist
  4. Has inflammation limited to 25cm proximal to the anal verge
  5. Has failed to achieve remission with, or be intolerant of, the use of conventional therapy defined as oral and/or rectal 5-Aminosalicylates, and/or oral and rectal steroids
  6. Has symptoms of active UC with a Mayo score of between 6 and12
  7. Medications:

    1. Oral 5-Aminosalicylates: If taking an oral 5-Aminosalicylates the patient has used them continuously for 4 weeks and has been on a stable dose for 2 weeks prior to the screening visit.
    2. Oral Corticosteroids: If taking oral corticosteroids the patient has used them continuously for 4 weeks and has been on a stable dose for 2 weeks prior to the screening visit at a dose of ≤30mg.
    3. Oral Azathioprine/6MP or Methotrexate: If taking one of these medications the patient has used them for a minimum of 12 weeks and has been on a stable dose for 4 weeks prior to screening.
    4. Rectal Preparations; 5-Aminosalicylates and corticosteroids: All rectal preparations have been ceased at least one week prior to Week 0.
  8. Has a normal serum potassium levels defined as 3.4-5mmol/L.
  9. Has normal renal function defined as a Glomerular Filtration Rate (GFR) >60ml/min.
  10. Willing to participate in the study and comply with the proceedings by signing a written informed consent.
  11. Free of any clinically significant disease, other than ulcerative colitis, that would interfere with the study's evaluations.
  12. Subjects can understand and is able to adhere to the dosing and visit schedules; Agrees to record symptom severity scores, medication times, adverse events and concomitant medications accurately and consistently.

Exclusion Criteria:

  1. Has Crohn's disease.
  2. Has colitis extending more than 25cm from the anal verge.
  3. Has a known hypersensitivity/allergic reaction to tacrolimus.
  4. Is pregnant or is breast-feeding.
  5. Has unstable, or poorly controlled, hypertension.
  6. Has an abnormal serum potassium level defined as outside the range of 3.4-5mmol/L.
  7. Has chronic renal failure defined as a Glomerular Filtration Rate <60 ml/min.
  8. Is currently using a potassium-sparing diuretic agent.
  9. Has received a trial medication within 12 weeks of screening.
  10. Has documented HIV infection.
  11. Has a known malignancy, a pre-malignant lesion, or any history of malignancy within the past 5 years (excluding squamous and/or basal cell carcinomas).
  12. Presence of alcoholism, alcoholic liver disease, or other chronic liver disease.
  13. Has known dementia and the inability to understand the trial requirements.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01418131

Locations
Australia, Australian Capital Territory
Canberra Hospital Recruiting
Canberra, Australian Capital Territory, Australia
Contact: Paul Pavli, MBBS PhD       Paul.Pavli@act.gov.au   
Principal Investigator: Paul Pavli, MBBS PhD         
Australia, New South Wales
Concord Repatriation General Hospital Not yet recruiting
Sydney, New South Wales, Australia
Contact: Rupert Leong, MBBS MD    +61 (02) 9767 5000    Rupert.Leong@swsahs.nsw.gov.au   
Principal Investigator: Rupert Leong, MBBS MD         
Royal Prince Alfred Hospital Not yet recruiting
Sydney, New South Wales, Australia
Contact: Wawick Selby, MBBS    0295156111    warwicks@sydney.edu.au   
Principal Investigator: Wawick Selby, MBBS         
Australia, Queensland
Royal Brisbane and Women's Hospital Not yet recruiting
Brisbane, Queensland, Australia
Contact: Graham Radford-Smith    07 3362 0171    Graham.Radford-Smith@qimr.edu.au   
Principal Investigator: Graham Radford-Smith, MB ChB DPhil         
The Mater Hospital Not yet recruiting
Brisbane, Queensland, Australia
Contact: Timothy Florin, MBBS PhD    07 3163 1111    t.florin@uq.edu.au   
Principal Investigator: Timothy Florin, MBBS PhD         
Australia, South Australia
Royal Adelaide Hospital Not yet recruiting
Adelaide, South Australia, Australia
Contact: Jane Andrews, MBBS PhD    +61 8 8222 5207    jane.andrews@health.sa.gov.au   
Principal Investigator: Jane Andrews, MBBS PhD         
Flinders Medical Centre Recruiting
Adelaide, South Australia, Australia
Contact: Peter Bampton, MBBS PhD       Petpeter.bampton@flinders.edu.au   
Principal Investigator: Peter Bampton, MBBS PhD         
Australia, Victoria
St Vincent's Hospital Recruiting
Fitzroy, Victoria, Australia, 3060
Contact: Michael Kamm, MBBS PhD       Micmkamm@unimelb.edu.au   
Principal Investigator: Michael Kamm, MBBS PhD         
Australia, Western Australia
Centre for IBD, Fremantle Hospital Recruiting
Fremantle, Western Australia, Australia, 6160
Contact: Ian Lawrance, MBBS PHD    61894313333    ian.lawrance@uwa.edu.au   
Principal Investigator: Ian C Lawrance, MBBS PhD         
Sponsors and Collaborators
The University of Western Australia
Mater Health Services' Adult Hospital, Brisbane
Concord Hospital
The Canberra Hospital
Royal Prince Alfred Hospital, Sydney, Australia
Investigators
Principal Investigator: Ian C Lawrance, MBBS PhD University of Western Australia, Fremantle Hospital
  More Information

Publications:
Responsible Party: Ian Lawrance, professor, The University of Western Australia
ClinicalTrials.gov Identifier: NCT01418131     History of Changes
Other Study ID Numbers: Tacro001
Study First Received: August 15, 2011
Last Updated: November 8, 2012
Health Authority: Australia: Human Research Ethics Committee

Keywords provided by The University of Western Australia:
Proctitis
resistant
ulcerative colitis
inflammatory bowel disease

Additional relevant MeSH terms:
Colitis
Colitis, Ulcerative
Proctitis
Ulcer
Gastroenteritis
Gastrointestinal Diseases
Digestive System Diseases
Colonic Diseases
Intestinal Diseases
Inflammatory Bowel Diseases
Rectal Diseases
Pathologic Processes
Tacrolimus
Immunosuppressive Agents
Immunologic Factors
Physiological Effects of Drugs
Pharmacologic Actions

ClinicalTrials.gov processed this record on July 20, 2014