- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04716738
Visceral Sensitivity in Women With BS and Sexual Dysfunction (IBS)
Sexual Dysfunction, Quality of Life and Visceral Hyperalgesia in Women With Irritable Bowel Syndrome
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Irritable bowel syndrome (IBS) is characterized by chronic abdominal pain related to alterations in defecation. Although the diagnostic criteria used in various consensuses may mask its true prevalence and incidence, it is known that it suffers between 5 and 15% of the population and it is more than two times more frequent in women. Only 10% of patients seek medical attention and even so it represents between 25 and 50% of gastroenterological visits in the United States. In Mexico the frequency is similar to that reported in the world.
IBS does not have a specific biological marker, but it is known that there are multiple factors involved in its pathophysiology. However, alterations in the gut-brain (GBA) are considered the main mechanism in the generation of symptoms.
The GBA regulates homeostatic functions through a set of organs that form a bidirectional network that links both elements. The neural portion includes peripheral elements (enteric nervous system, ENS), related elements (pairs of spinal and cranial nerves) and central (superior brain nuclei).
The ENS (neurons in the intestinal wall, epithelial and endocrine elements, associated neurotransmitters, and visceral smooth muscle) is the third division of the autonomic nervous system.
Once sensory information is captured in peripheral receptors, the information travels by intrinsic innervation to generate local reflexes in the viscera (absorption, secretion, motility and sensitivity) or by extrinsic innervations of the vagus nerve and thoracolumbar sympathetic afferent pathways towards the spinal medulla.
The main route of afferent activation is through the prevertebral ganglia that carry the signal to the dorsal horns of the spinal cord that travel through the lateral spinothalamic tract that, through the thalamus; activates cortical areas of pain somatic location and by limbic areas for emotional evaluation. These changes in the brain connectome are diverse and it is an area in development.
This complex GBA relationship in IBS patients includes differences in sex, comorbidities, and quality of life (QOL). These differences include the activation of estrogen receptors distributed along the visceral pain pathways (ENS, spinal cord and brain centers) as they modulate the opening of ion channels, regulate the tachykinin receptor NK1 and induce substance release. Additionally, estrogens modulate visceral information in the CNS. Elevated estrogen in the amygdale, increase the sensomotor response to rectal distention in oophorectomized rats. There are also studies that suggest that estrogens may alter the expression of specific pain receptors such as the glucocorticoid receptor and involve the opioid system. Changes have been observed in brain structure and functional connectivity in women, as well as other sexual factors. There are multiple overlaps with other functional digestive diseases, non-digestive diseases, and psychological and psychiatric disorders.
These complex connections make us see the IBS as a multisystemic disorder with alterations in QOL and other comorbidities, such as sexual dysfunction (SD). Since 1987 it has been shown that up to 83% of patients with IBS have SD. In 1993 it was recognized that sexual abuse may be related to IBS and that it alters the perception of pain. In 1998, SD was positively associated with the severity of gastrointestinal symptoms. Patients with IBS have a greater number of problems of physical and psychological abuse, the symptoms are aggravated with menstruation and are related to hormonal changes.
On the other hand, patients with IBS have shown visceral hypersensitivity. The best method to determine visceral mechanical sensitivity is the barostat. Recently, it has been shown that there is a relationship between the severity of symptoms, quality of life, psychological stress, colonic transit and visceral hypersensitivity in patients with IBS. Patients with IBS and a history of severe physical/sexual abuse have visceral hyposensitivity. IBS presents a higher frequency of SD, as well as a deteriorated QOL and visceral hypersensitivity.
No studies with barostat and determination of QOL have been conducted in the same population of patients with IBS and SD, comparing them with patients with IBS and without SD.
Establishing the relationship between QOL, SD and possible visceral hypersensitivity will make it possible to characterize this population and thus be able to establish new therapeutic strategies.
General hypothesis: Women with IBS and SD have greater visceral rectal hypersensitivity than those without SD.
Primary objective: To evaluate the pattern of rectal visceral sensitivity in patients with IBS and SD and compare it with patients with IBS without SD.
Secondary: To assess the QOL in patients with IBS with and without SD. Universe: Women with IBS with and without sexual dysfunction, who are cared for in the Gastroenterology service of the General Hospital of Mexico.
Sample. Group 1: Patients with IBS and sexual dysfunction (n = 20). Group 1: Patients with IBS without sexual dysfunction (n = 20). The assignment of patients with IBS to the study group with and without sexual dysfunction will be according to the consecutive order in which they present to their clinic visit and after determining the Global Assessment of the Female Sexual Function Index.
Sample Size. The relationship between sample size, power and detectable difference was investigated, based on a previous study that evaluated the pain threshold recorded with the barostat in a problem group and a control group. The analysis was carried out comparing the two means with the unpaired Student's t, with two tails and an alpha value of 0.05. The anticipated standard deviation for each group resulted from the average between the standard deviation of the problem group (8.3) with the control group (8.8), resulting in a value of 8.5. The difference between means of the control group (35.9) and the problem group (27.2), resulted in 8.7. With this data a sample size of 16 subjects per group was obtained with a statistical power of 80%. Twenty women will be recruited to prevent the probable loss of 20%.
Measurements. Rome IV. The Rome IV, 2016criteria specify that abdominal pain must have occurred at least in the last 6 months with a frequency of at least once a week in the last 3 months and be related with at least 2 of the following characteristics: (a) Related to defecation, (b) Associated with changes in the frequency of defecation and / or (c) Associated with changes in the appearance of stool. The subtypes (constipation, diarrhea, mixed or indeterminate) are determined with the Bristol scale. Its application does not require special permissions.
Sexual function questionnaire. (Female Sexual Function Index, FSFI). The female sexual function index that we will use has been widely used in the Mexican population.40-42 It has 19 questions that evaluate 6 domains: Desire, arousal, lubrication, orgasm, satisfaction, and pain. The higher the score, the better the function. The optimal cut-off point to determine whether or not there is sexual dysfunction has been determined at 24.95 (sensitivity 64.15% and specificity of 75.76%). Does not require application permits.
General quality of life questionnaire (Short Form 36, SF-36). The SF-36 questionnaire has been adapted to the Mexican population and consists of 36 questions that assess 8 domains: physical function, physical role, body pain, general health, vitality, role emotional and mental health. The studies published on the characteristics of the Spanish version of the SF-36 provide enough evidence on its reliability, validity and sensitivity. Does not require application permits.
Specific Quality of Life Questionnaire for Irritable Bowel Syndrome (IBS-QOL) Developed in 199545 it has been used and widely validated in the Mexican population. It consists of 34 questions on a Likert scale from 1 to 5. It measures: Dysphoria, interference with activity , body image, health concern, food avoidance, social reaction, sexual concern and social relationship. The total score and scores in each dimension are converted on a scale from 0 to 100. Higher values indicate a better health-related quality of life. This questionnaire is copyrighted in favor of the MAPI institute.
Barostat Visceral sensitivity will be evaluated using a rectal barostat. After an overnight fast, a warm water enema will be performed 60 to 120 minutes before the study. Subjects will be studied without sedation and in the left lateral decubitus position. A rectal barostat distention will be placed 5 cm above the anal margin. Before starting the distension test, the subject will be warned that a rectal stimulus will be applied without her knowledge and when the light is illuminated on the perception panel, she must indicate her degree of pain perception. Gradual isobaric distention will be performed with increases of 4 mmHg from IOP. Strains will be performed to a grade 5 sensation or up to 50 mmHg (maximum strain pressure) or at the request of the subject. Each distension will be 1 minute in duration, and a 1 minute rest period will be observed between each step. At each pressure step, the volume of the bag will be recorded to assess rectal compliance. After 45 seconds of each distension step the light on the perception panel will illuminate to request the degree of rectal sensation of the subject under study. The intensity of the sensation will be quantified according to the control panel with numerical scales: 0 no sensation; 1 first sensation; 2 sensation of gas; 3 sensation of defecation; 4 mild pain; 5 moderate pain and 6: severe pain. Between each distension the pressure will return to the internal operating pressure. After this first phase, previously standardized foods will be taken. The meal will consist of 831 kcal and will be made with potato (100 g), mayonnaise (20 g), ham (100 g), margarine (20 g) and pineapple juice (250 ml). Each subject will consume the food completely in a maximum of 15 minutes. Thirty minutes after finishing the food, the postprandial tone and MLA will be measured.
STATISTIC ANALYSIS Parametric data will be compared using Student's t test. Nonparametric data will be compared using the Mann-Whitney U test. Symptoms and percentages will be evaluated with Fisher's exact test or chi square. The associations between data will be analyzed with the Spearman and Pearson correlation tests. The data will express the mean ± standard deviation and in percentages. Alpha = 0.05.
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Santiago Camacho, MD, MSc
- Phone Number: +525527462640
- Email: santiach@yahoo.com.mx
Study Contact Backup
- Name: Miguel Motola, Researcher
- Phone Number: +525519484826
- Email: drmotola@gmail.com
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- -18 Years And Older,
- -Meet The Diagnostic Criteria Of Roma Iv For Ibs ,
- - Agreeing To Participate In The Study And Sign Informed Consent
Exclusion Criteria:
- -Patient With Non-Ibs-Related Visceral Neuropathy
- - Prokinetic And/Or Antidepressant Treatment Within 3 Months
- - Patients With Gastrointestinal Or Ibs-Related Disease
- - Patients With Severe Heart, Kidney And/Or Systemic Diseases
- - Pregnant Or Nursing Patients
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Irritable Bowel Syndrome with Sexual Dysfunction
We use Rome IV criteria, scale bristol and the female sexual fuction to establish IBS and sexual dysfunction diagnosis, and SF-36 to determinated quality of life.
|
We will take a blood and stool sample
|
Irritable Bowel Syndrome without Sexual Dysfunction
We use Rome IV criteria, scale bristol and the female sexual fuction to establish IBS and sexual dysfunction diagnosis, and SF-36 to determinated quality of life.
|
We will take a blood and stool sample
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change on barostat study during menstrual cycle
Time Frame: Second and third visit: Day 7 and day 21 of the menstrual cycle
|
In this procedure, a small bag is placed in the rectum which is connected to a computer.
This computer will insufflate air (in mL), measuring the pressure (in mmHg) inside the viscus (in this case the rectum) all time.
With this system, a very precise feedback system is created allowing decrease or increase the pressure inside the rectum and thereby provoke the perception in the patient of different sensations.
With the barostat we can simulate what happens when the stool reaches the rectum.
Thus, the patient can report a first sensation, gas sensation, the need to defecate and even pain (mild, moderate or intense)
|
Second and third visit: Day 7 and day 21 of the menstrual cycle
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
General Quality of Life questionnaire (SF-36, Short Form-36)
Time Frame: Baseline
|
This questionnaire consists of 36 questions that evaluate 8 domains (Items): physical function (10), physical role (4), body pain (2), general health (5), vitality (4), social function (2), role emotional (3) and mental health (5).
Additionally, the SF-36 has a transition item that asks about the change in general health status compared to the previous year.
Items are coded, aggregated and transformed on a scale from 0 (worst health status for that dimension) to 100 (best health status).
Scores for the physical and emotional scale can also be calculated through an orthogonal approach
|
Baseline
|
Specific Quality of Life questionnaire (IBS-QOL, Irritable Bowel Syndrome-Quality of Life)
Time Frame: Baseline
|
This questionnaire consists of 34 questions on a Likert scale from 1 to 5. It measures a total score and 8 dimensions (items): Dysphoria (8), interference with activity (7), body image (4), concern for health ( 3), food avoidance (3), social reaction (4), sexual concern (2) and social relationship (3).
The total score and the scores in each dimension are converted on a scale from 0 to 100.
Higher values indicate a better health-related quality of life
|
Baseline
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Santiago Camacho, MD, MSc, 6761
Publications and helpful links
General Publications
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Study record dates
Study Major Dates
Study Start (Anticipated)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- DI/19/107/03/080
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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Clinical Trials on Irritable Bowel Syndrome
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ProgenaBiomeRecruitingIrritable Bowel Syndrome | Irritable Bowel Syndrome With Diarrhea | Irritable Bowel Syndrome With Constipation | Irritable Bowel Syndrome Characterized by Constipation | Irritable Bowel Syndrome Mixed | Irritable Bowel Syndrome Without Diarrhea | Irritable Bowel | Irritable Bowel Syndrome Aggravated and other conditionsUnited States
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ClasadoCR2O B.V.RecruitingIrritable Bowel Syndrome | Irritable Bowel Syndrome - Constipation | Irritable Bowel Syndrome - Diarrhoea | Irritable Bowel Syndrome - MixedBelgium, Netherlands, United Kingdom
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Istanbul Medipol University HospitalTepecik Training and Research Hospital; Bozyaka Training and Research Hospital and other collaboratorsRecruitingIrritable Bowel Syndrome | Irritable Bowel Syndrome With Diarrhea | Irritable Bowel Syndrome With Constipation | Irritable Bowel Syndrome MixedTurkey
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Federal Stare Budgetary Scientific Institution,...I.M. Sechenov First Moscow State Medical University; RML INVEST, Torkhovsky...CompletedIrritable Bowel Syndrome | Irritable Bowel Syndrome With Diarrhea | Irritable Bowel Syndrome With Constipation | Irritable Bowel Syndrome MixedRussian Federation
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University of California, Los AngelesCompletedIrritable Bowel Syndrome With Diarrhea | Irritable Bowel Syndrome With Mixed Bowel HabitsUnited States
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University of ViennaCompleted
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Thomayer University HospitalCharles University, Czech RepublicActive, not recruitingIrritable Bowel Syndrome With Diarrhea | Irritable Bowel Syndrome MixedCzechia
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Shahid Beheshti University of Medical SciencesCompletedIrritable Bowel DiseaseIran, Islamic Republic of
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Universidad Autonoma de ChihuahuaNot yet recruitingIrritable Bowel Syndrome | Constipation-predominant Irritable Bowel Syndrome | Diarrhea- Irritable Bowel Syndrome
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Vasily IsakovRussian Science Foundation; Azbuka vkusa; Federal Research Centre of Nutrition...CompletedIrritable Bowel Syndrome With Constipation | Constipation-predominant Irritable Bowel SyndromeRussian Federation
Clinical Trials on Blood analyses and coprological
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Academisch Medisch Centrum - Universiteit van Amsterdam...Erasmus Medical CenterUnknownCarcinoma, Pancreatic DuctalNetherlands
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Assistance Publique Hopitaux De MarseilleRecruiting
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Shanghai Zhongshan HospitalGuangzhou Burning Rock Bioengineering Ltd.Recruiting
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Intergroupe Francophone du MyelomeTerminatedCovid19 | Multiple MyelomaFrance
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Shanghai Zhongshan HospitalGuangzhou Burning Rock Bioengineering Ltd.Recruiting
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University of CagliariProf. Pietro Giorgio Calò; Dott. Gian Luigi CanuNot yet recruitingThyroid Cancer | Thyroid NoduleItaly
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Mario Negri Institute for Pharmacological ResearchActive, not recruiting
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National University Hospital, SingaporeTan Tock Seng Hospital; MiRXES Pte LtdCompleted
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Technische Universität DresdenCompletedHead and Neck CancerGermany
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Rijnstate HospitalCompletedInfrarenal Abdominal Aortic AneurysmNetherlands