Healthy
Conditions
Keywords
neuronal-glial-epithelial unit, anorectal function
Brief summary
This study aims to assess the phenotype of the enteric nervous system (enteric neurons) in healthy subjects. The enteric nervous system (ENS) is composed by enteric neurons and enteric glial cells. There is a cross-talk between ENS and the intestinal epithelial barrier (IEB). ENS and IEB together constitute the neuronal-glial-epithelial unit. This unit has a key role in gut functions. The characteristics and the phenotype of the ENS also change according to age and environmental factors. Similar study is ongoing for patients with Spina Bifida. Anorectal data and phenotype of the neuronal-glial-epithelial unit in healthy subjects is required to assess abnormality of these items in patients with neurological disease including Spina Bifida.
Interventions
PROCEDUREendoscopy
colonic biopsies during endoscopy and anal manometry with barostat and anal endoflip
Sponsors
Rennes University Hospital
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
* subject aged between 18 and 65 years old age and sex matched with the first sixteen patients included and evaluated in the ANOSPIN study * subject who gave their written consent to participate to the present study * subject not included in another study * subject covered by social insurance system
Exclusion criteria
* Pregnant or nursing women; * Anticoagulants therapy or coagulation disorders; * Past history of anal or rectal surgery * Crohn disease or ulcerative colitis * Irritable bowel syndrome according to the Rome III criteria; * Past history of pelvic radiotherapy * Pas history of rectal or anal cancer * Anorectal symptoms : faecal incontinence, constipation, anorectal pain, rectal prolapse; * CCIS \>5 (faecal incontinence); * Kess Score \>9 (constipation); * Colonic irrigation; * Use of laxatives; * Abnormal colonic mucosa * Period of exclusion; * Patient under guardianship or unable to give their consent;
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Number of enteric neurons per ganglion | data collected at the day of endoscopy | colonic biopsies will be used to study intestinal permeability, colonic inflammation and enteric nervous system |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| density and activity of the enteric glial cells | data collected at the day of endoscopy | colonic biopsies will be used to study intestinal permeability, colonic inflammation and enteric nervous system |
| rectal adaptation | data collected at the day of endoscopy | rectal adaptation is defined by a volume variation during ascending pressure (phasic distension). It will be performed with a bag connected to electronic barostat |
| rectal perception | data collected at the day of endoscopy | It will performed by using 6-point Likert scale ranging from 0 (no sensation) to 6 (intolerable pain) |
| anal distensiblity | data collected at the day of endoscopy | It will be performed by using ENDOFLIP |
| intestinal permeability | data collected at the day of endoscopy | Biopsy samples collected at the time of colonoscopy will be use within a Ussing Chamber able to assess intestinal permeability. The Ussing chamber is used to measure the short-circuit current as an indicator of net ion transport taking place across an epithelium, such as gut mucosa. The measure will be performed on 2 biopsies from each patient. |
| macroscopic and microscopic colonic inflammation | data collected at the day of endoscopy | Colonic inflammation will be assessed during the scope procedure. The physician will assess the normality of the mucosa or not in case of mucosal erythema, ulceration or a decrease of the vascular pattern. Microscopic inflammation will be assessed by the pathologist according to neutrophils infiltration in the gut, crypt abscess, crypt distortion. |
Countries
France
Contacts
PRINCIPAL_INVESTIGATORCharlène BROCHARD, Md
Rennes University Hospital
Outcome results
None listed