Vitamin D Levels in Subjects With Chronic Urticaria and Angioedema

This study has been completed.
Sponsor:
Information provided by:
University of Nebraska
ClinicalTrials.gov Identifier:
NCT00876369
First received: April 2, 2009
Last updated: December 17, 2009
Last verified: December 2009
  Purpose

The objective of this study is to perform an exploratory analysis to determine if a possible relationship between vitamin D and chronic urticaria and/or angioedema exists. The study hypothesis is that vitamin D deficiency is associated with chronic urticaria and/or angioedema.


Condition
Urticaria
Angioedema

Study Type: Observational
Study Design: Observational Model: Ecologic or Community
Time Perspective: Cross-Sectional
Official Title: Vitamin D Levels in Subjects With Chronic Urticaria and Angioedema

Resource links provided by NLM:


Further study details as provided by University of Nebraska:

Primary Outcome Measures:
  • Vitamin D levels [ Time Frame: one measurement ] [ Designated as safety issue: No ]

Estimated Enrollment: 50
Study Start Date: September 2009
Study Completion Date: December 2009
Primary Completion Date: December 2009 (Final data collection date for primary outcome measure)
Groups/Cohorts
Urticaria/Angioedema
Subjects with chronic urticaria and/or angioedema
allergy control
Subjects with physician diagnosed allergic rhinitis

Detailed Description:

The purpose of the research protocol is to perform a pilot study to determine the levels of 25-hydroxy vitamin D (25OHD), the storage form of vitamin D, in subjects with chronic urticaria and angioedema. Vitamin D is recognized as a key element in the regulation of the innate and adaptative immune system, and deficiencies of vitamin D could play an important role with inflammatory skin conditions such as chronic urticaria and angioedema.

Vitamin D deficiency has been implicated in contributing to the pathogenesis of skin inflammatory disorders including atopic dermatitis, rosacea and psoriasis. Deficiencies in vitamin D have recently been speculated to be associated with anaphylaxis diagnosis and treatment. The role of vitamin D in other allergic disorders such as allergic rhinitis is not clear. Chronic urticaria and angioedema (CUA) is a debilitating allergic disorder defined as recurrent urticaria and/or angioedema on a regular basis for greater than 6 weeks. The etiology of this disorder is largely unknown, but occurs predominately in females and can be associated with autoimmunity and thyroid disease. Vitamin D could potentially have an important role in the pathogenesis and treatment of CUA, but there are no studies to date examining the potential association of CUA and 25OHD levels.

This pilot study seeks to recruit two groups of adult subjects (ages 19 and up): 1) Control allergy group: subjects with physician-diagnosed allergic rhinitis, and 2) Subjects with physician-diagnosed chronic urticaria and/or angioedema. Subjects in the 2 groups will answer a questionnaire to collect information regarding demographics, vitamin D supplementation, previous diagnostic tests, current medications, and also a validated Dermatology Life Quality Index (attached). Other information will be obtained as available from the medical record: weight, height, body mass index (BMI), thyroid stimulating hormone (TSH), free thyroxine (T4), thyroid autoantibodies, urticaria autoimmune testing (autologous serum skin test, CD203c results), anti-nuclear antibody (ANA) and allergy skin prick testing. These stated tests are drawn for the evaluation of subjects with CUA. All subjects will have blood draw for 25OHD levels, and the levels will be compared between the 2 groups. It has been previously reported that approximately 15-30% of healthy populations are deficient in Vitamin D. There is no intervention component. Subjects will receive the 25OHD results, but no further follow-up is planned.

The objective of this pilot study is to perform an exploratory analysis to determine if a possible relationship between 25OHD and CUA exists, and to determine power calculations for a larger study. Finally, information regarding Vitamin D may be beneficial in determining potential contributing factors and also in the treatment of subjects with CUA.

  Eligibility

Ages Eligible for Study:   19 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

Subjects at subspeciality clinic (allergy/immunology) at tertiary care medical center

Criteria

Inclusion Criteria:

  1. Group 1: subjects with physician-diagnosed allergic rhinitis. Allergic rhinitis is defined by clinical symptoms of sneezing, runny nose, nasal congestion and evidence of IgE-mediated disease (allergy skin prick test positive or radioallergosorbent test [RAST] positive to environmental inhalants such as trees, grasses, weeds, animal dander, molds, dust mite, cockroach).
  2. Group 2: subjects with physician-diagnosed chronic urticaria and/or angioedema (CUA). CUA is defined by having urticarial wheals (hives) and/or angioedema (dermal swelling) on a daily or almost daily for more than 6 weeks.

Exclusion Criteria:

  1. They are not capable of answering the questionnaire.
  2. They are diagnosed with hereditary angioedema. Hereditary angioedema is a genetic disorder, autosomal dominant, of the C1 esterase inhibitor protein. These subjects will be excluded as the etiology of their disease is known.
  3. Pregnant or lactating women. All child-bearing women will be asked (verbally and on the questionnaire) if they are pregnant or lactating. If they answer yes, they will be excluded. As there is no risk or harm to the pregnant or lactating woman, a urine pregnancy test will not be used.
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00876369

Locations
United States, Nebraska
University of Nebraska Medical Center
Omaha, Nebraska, United States, 68198
Sponsors and Collaborators
University of Nebraska
Investigators
Principal Investigator: Jill A Poole, MD University of Nebraska
  More Information

No publications provided

Responsible Party: Jill A. Poole, MD, University of Nebraska Medical Center
ClinicalTrials.gov Identifier: NCT00876369     History of Changes
Other Study ID Numbers: 045-09-EP
Study First Received: April 2, 2009
Last Updated: December 17, 2009
Health Authority: United States: Institutional Review Board

Keywords provided by University of Nebraska:
urticaria
angioedema
vitamin D
allergy

Additional relevant MeSH terms:
Urticaria
Angioedema
Skin Diseases, Vascular
Skin Diseases
Hypersensitivity, Immediate
Hypersensitivity
Immune System Diseases
Vascular Diseases
Cardiovascular Diseases
Vitamins
Vitamin D
Micronutrients
Growth Substances
Physiological Effects of Drugs
Pharmacologic Actions
Bone Density Conservation Agents

ClinicalTrials.gov processed this record on September 22, 2014