An observational study in Colitis, Ulcerative, sponsored by European Georges Pompidou Hospital. Status unknown at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2016-02-08.
Sponsored by European Georges Pompidou Hospital · Observational
The aim of the study is to construct and validate an endomicroscopic score correlated with microscopic inflammation activity in patients with UC.
Probe-based confocal laser endomicroscopy (pCLE) is a new endoscopic imaging modality, which offers the possibility to perform in vivo mucosal microscopic analysis in real time during endoscopy.
Primary Objectives : Development and validation of a UC endomicroscopic score, after correlation between pCLE data and histological data using the Geboes' score as a gold standard during ulcerative colitis.
Secondary Objectives:
Informed consent will be obtained before colonoscopy that includes the known risks and benefits related to the procedure according to the standard protocol of the physician and institution.
A separate informed consent document to participate in the study specific to the approach, technology will be executed.
Operator's training before the beginning of the study
Thirty short pCLE video sequences will be sent to each investigator. Video sequence contains pCLE images of mucosal inflammation in a patient with UC. For each video the correlation with histology is known. The investigator will have to recognize the different pCLE inflammation criteria (Annex 2) and a 90% correct response rate will be required.
MACROSCOPIC examination: colonoscopy
Bowel preparation according to standard protocol was used for colonoscopy. During the colonoscopy, the rectal and colonic mucosal will be analysed with high resolution white light (with or without virtual chromoendoscopy). Before pCLE examination and according to current guidelines, targeted biopsies will be taken in every suspected area of dysplasia for specific histological examination.
MICROSCOPIC examination: pCLE (Cellvizio)
pCLE examination will be done after intravenous injection of fluoresceine (2.5 ml), with the monitoring of cardiovascular and respiratory functions. Three defined area will be analysed: right colon, left colon (40cm from the anus) and the rectum (10cm). Real time analysis and re-reading after the colonoscopy will be done for the video sequences recording during the procedure. A double-blind analysis for each video sequence will be done by two experienced endoscopists.
Rectal and colonic biopsies
For each location (right colon, left colon and rectum), 4 macroscopic area will be indentified (anterior, posterior, left and right), recorded (endoscopic images) and the mucosal inflammation will be scored according to the Mayo's and UCEIS classifications. Then, the probe using for the pCLE procedure will be applied on these 4 different areas and video sequences will be recorded ("optical biopsies"). At the end of the procedure, biopsies will be taken from each area. Each biopsy will have a registration number and the corresponding pCLE video sequence will be specified.
For each location (right colon, left colon, rectum), the final score of inflammation (macroscopic or microscopic) will be define by the higher score recorded in the 4 areas (anterior, posterior, left and righ).
Sensibility to change
For the patients with active UC in group 2 (Mayo' sub-score 2 or 3), a rectosigmoidoscopy should be performed 8 weeks after starting therapy, according to current french guidelines. In order to compare the pCLE examination before and after adalimumab therapy in the group 2, each area will be identified with a submucosal injection of Indian ink.
1,073 studies on the registry are indexed under Colitis; 131 are open to participants now.
This study's planned enrollment of 100 is close to the median of 105 across 247 observational studies indexed under Colitis.
Browse Colitis studies →European Georges Pompidou Hospital is the lead sponsor of 23 studies on the registry; 4 are open to participants now.
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Patients with UC who need control coloscopy
Diagnosis of UC established at least for three months, according to the Lennard-Jones' criteria. Two sub-groups will be studied as follows;
Exclusion Criteria:
Group 1 (n=70) = UC in remission regardless of the medication that allowed remission nor taken by the patient (Mayo' sub-score 0 or 1) and who require colonoscopy regardless of the study according to current guidelines (screening for dysplasia, monitoring during treatment etc).
Group 2 (n=30) = Active UC (Mayo' sub-score 2 or 3) requiring adalimumab and for whom a rectosigmoidoscopy will be performed 8 to 12 weeks after starting therapy, according to current French guidelines and routine practice. Eight weeks after the treatment is the minimum time necessary to evaluate the effects of this treatment according the current practice in France. Then, investigators chose in our study to assess the effects in the group 2 at 8 weeks. All the 30 patients in group 2 will receive adalimumab and they will be anti-TNF naïve patients.
Inflammation assessment by pCLE videos and standard histology
Inflammation will be present if ONE or MORE of the following criteria will be showed by the pCLE examination (the number of criteria will be defined "a posteriori" after comparison with the histological results): * crypt: : number (0-10), size (10 to 200 micrometers), distance between 2 crypts (increase or normal) * cells : number (0 to 50), color (white or black) * vessels : number, diamter (\> or \< 20 micrometers) * fluoresceine leakage (yes or no)
Time frame: 6 months
Changes in pCLE criteria after adalimumab and safety of pCLE
Inflammation will be present if ONE or MORE of the following criteria will be showed by the pCLE examination (the number of criteria will be defined "a posteriori" after comparison with the histological results): * crypt: : number (0-10), size (10 to 200 micrometers), distance between 2 crypts (increase or normal) * cells : number (0 to 50), color (white or black) * vessels : number, diamter (\> or \< 20 micrometers) * fluoresceine leakage (yes or no) pCLE safety (intravenous fluoresceine): cardiological trouble: yes or no allergy (yes or no)
Time frame: 6 or 8 weeks
This study is status unknown, as verified in Feb 2016. You cannot join it, but the record below documents what was studied.
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European Georges Pompidou Hospital