Osteoporosis In Non-Celiac Wheat Sensitivity Patients

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

270 participants

Study Classification

OBSERVATIONAL

Study Start Date

2015-05-01

Study Completion Date

2019-06-01

Brief Summary

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Non-celiac gluten sensitivity (NCGS) or 'wheat sensitivity' (NCWS) is included in the spectrum of gluten-related disorders. No data are available on the prevalence of low bone mass density (BMD) in NCWS. Our study aims to evaluate the prevalence of low BMD in NCWS patients and search for correlations with other clinical characteristics.

This prospective observation study will include 90 NCWS patients with irritable bowel syndrome (IBS)-like symptoms, 90 IBS and 90 celiac controls. Patients will be recruited at the Internal Medicine and at the Gastroenterology Units of the University of Palermo. Elimination diet and double-blind placebo controlled (DBPC) wheat challenge proved the NCWS diagnosis. All subjects underwent BMD assessment by Dual Energy X-Ray Absorptiometry (DXA), duodenal histology, Human Leukocyte Antigen (HLA) DQ typing, body mass index (BMI) evaluation and assessment for daily calcium intake.

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Detailed Description

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Celiac disease (CD) has been reported to increase the risk of osteoporosis, with a resulting augmented risk of fractures. More recently, it has been reported that a consistent percentage of the general population consider themselves to be suffering from problems caused by wheat and/or gluten ingestion, even though they do not have CD or wheat allergy. This clinical condition has been named Non-Celiac Gluten Sensitivity' (NCGS). In a previous paper the investigators suggested the term 'Non-Celiac Wheat Sensitivity' (NCWS), since it is not known what component of wheat causes the symptoms in NCGS patients, and the investigators also showed that these patients had a high frequency of coexistent multiple food hypersensitivity. That previous study also showed a percentage of NCWS patients had weight loss and anemia: whether these depended on the intestinal malabsorption or not remains unclear. As yet no data are available on the presence and prevalence of low bone mass density (BMD) in NCWS patients. The aims of the present study is: 1) to investigate the prevalence of low BMD in NCWS patient and 2) to search for a possible correlation between BMD and other clinical characteristics, in particular the body mass index (BMI), of NCWS patients.

Conditions

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Non-celiac Wheat Sensitivity

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

PROSPECTIVE

Study Groups

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NCWS patients

Consecutive adult patients with an irritable bowel syndrome (IBS)-like clinical presentation, according to Rome II criteria, and a definitive diagnosis of NCWS.

No interventions assigned to this group

CD patients

Sex- and age-matched subjects with CD, diagnosed according to standard criteria during the same study period and enrolled as first control group

No interventions assigned to this group

IBS patients

Sex- and age-matched subjects with IBS unrelated to NCWS or other food 'intolerance', diagnosed according to standard criteria during the same study period and enrolled as second control group

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

To diagnose NCWS the recently proposed criteria will be adopted. All the patients will meet the following criteria:

* negative serum anti-transglutaminase (anti-tTG) and anti-endomysium (EmA) immunoglobulin (Ig)A and IgG antibodies;
* absence of intestinal villous atrophy;
* negative IgE-mediated immune-allergy tests to wheat (skin prick tests and/or serum specific IgE detection);
* resolution of the IBS symptoms on standard elimination diet, excluding wheat, cow's milk, egg, tomato, chocolate, and other self-reported food(s) causing symptoms;
* symptom reappearance on double-blind placebo-controlled (DBPC) wheat challenge. As the investigators previously described in other studies, DBPC cow's milk protein challenge and other "open" food challenges will be performed too.

* age \>18 years; follow-up duration longer than six months after the initial diagnosis;
* at least two outpatient visits during the follow-up period.

Exclusion Criteria

* positive EmA in the culture medium of the duodenal biopsies, also in the case of normal villi/crypts ratio in the duodenal mucosa;
* self-exclusion of wheat from the diet and refusal to reintroduce it, before entering the study;
* other "organic" gastrointestinal disorders;
* nervous system disease and/or major psychiatric disorder;
* physical impairment limiting physical activity;
* menopause;
* steroid and sex steroid therapy, hormone replacement therapy or ovariectomy.

Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No