The Role of Vitamin D in Chronic Urticaria and Angioedema Treatment

Urticaria Clinical Trial

Official title:

The Role of Vitamin D in Chronic Urticaria and Angioedema Treatment

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01371877
• Other study ID #: 0271-11-FB
• Status: Completed
• Phase: N/A
• Start date: November 1, 2011
• Est. completion date: September 1, 2013

Study information

• Verified date: September 2023
• Source: University of Nebraska
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This clinical study was designed based on our hypothesis that vitamin D plays an important role in chronic urticaria and that high dose supplementation with vitamin D in subjects with chronic urticaria will improve clinical response.

This clinical study will investigate our hypothesis in three Specific Aims:

1. Determine whether high dosing vitamin D supplementation (4000 IU/day) reduces medication usage (primary outcome) and urticaria severity score (secondary outcome) in subjects with chronic urticaria as compared to low dosing (600 IU/day).

2. Determine if high dosing of vitamin D (4000 IU/day) is safe and well-tolerated in subjects with chronic urticaria with or without baseline vitamin D deficiency.

3. Investigate whether there is an association with serum 25-hydroxyvitamin D levels, vitamin D receptor mRNA expression, and chronic urticaria severity.

Description:

The purpose of this pilot, 12 week, clinical research study is to determine if supplementation with Vitamin D will improve the clinical outcome in subjects with chronic urticaria and angioedema (CUA). Vitamin D is a key element in the regulation of immune system responses, and vitamin D could play an important role in the treatment of CUA. Recently, we published that there is an important association with CUA and serum 25-hydroxy vitamin D (25OHD). Namely, vitamin D levels in subjects with CUA were significantly lower as compared to subjects with an alternative allergic disorder, allergic rhinitis. There is now one other observational report that supplementation with vitamin D (50,000/wk) in subjects CUA resulted in clinical improvement; however, there was only one treatment arm and optimal serum 25OHD required to obtain benefit was not investigated.

This current study is a double-blinded, prospective, interventional study that seeks to recruit adult subjects with physician-diagnosed CUA and randomize subjects to either the recommended dietary allowance (Vitamin D 600 IU/day) or the recommended upper limit of intake (Vitamin D 4000 IU/day). Subjects will answer a questionnaire to collect information regarding demographics, previous diagnostic tests, medications, and complete an urticaria severity score (USS). Information from the medical record: weight, height, body mass index (BMI), thyroid stimulating hormone (TSH), free thyroxine (T4), thyroid autoantibodies, urticaria autoimmune testing (CD203c results), anti-nuclear antibody (ANA), urinalysis, and allergy skin prick testing, which are part of the CUA evaluation will be obtained. Subjects will have research blood draws for serum 25OHD level, iPTH, calcium, phosphorus, albumin, urine calcium, and vitamin D receptor (VDR) gene expression. All subjects will receive standard-of-care therapy according to the 2009 Third International Consensus Meeting on Urticaria position guidelines. Follow-up visits for medication usage, urticaria severity score, and serum and urine safety monitoring will be at 6 and 12 weeks.

The hypothesis of this study is that high dosing of vitamin D will result in clinical improvement in subjects with CUA. The primary clinical endpoint is medication usage, and the secondary outcomes are urticaria severity score and prednisone rescue use. We will explore if threshold serum 25OHD levels correlate and VDR expression correlate to clinical outcomes, and to determine power analysis to conduct a larger scale study. Finally, the study aims to determine if vitamin D supplementation is safe and well-tolerated in subjects with CUA.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 42
• Est. completion date: September 1, 2013
• Est. primary completion date: September 1, 2013
• Accepts healthy volunteers: No
• Gender: All
• Age group: 19 Years and older

Eligibility

Inclusion Criteria:

• Subjects will be included if they have 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. Patients with CUA also having signs of dermatographism and/or delayed-pressure urticaria will be included in the study. Subjects with history of intolerance to non-steroidal anti-inflammatory drugs will be included but warned not to take this drug class (acetaminophen will be allowed instead).

Exclusion Criteria:

• Subjects will be excluded if:

1. They are not capable of answering the questionnaire.

2. Subjects with a pure physical or allergic urticarias, and/or hereditary and acquired angioedema (C1 esterase inhibitor deficiency). 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.

4. Subjects with any clinically significant abnormality in biochemistry testing, and/or hypercalcemia (calcium > 10.3 mg/dl) or renal insufficiency (GFR< 50 ml/min).

5. Subjects with a history of primary hyperparathyroidism, renal tubular acidosis, sarcoidosis, granulomatous disease, or malignancy.

Related Conditions & MeSH terms

• Angioedema
• Chronic Urticaria
• Hives
• Swelling
• Urticaria

Intervention

Drug:
• High Dose Vitamin D3
Vitamin D 4000 IU per day for 3 months
• Low Dose Vitamin D3
Vitamin D 600 IU per day

Locations

Country	Name	City	State
United States	University of Nebraska Medical Center	Omaha	Nebraska

Sponsors (1)

Lead Sponsor	Collaborator
University of Nebraska

Country where clinical trial is conducted

United States, 

References & Publications (1)

Thorp WA, Goldner W, Meza J, Poole JA. Reduced vitamin D levels in adult subjects with chronic urticaria. J Allergy Clin Immunol. 2010 Aug;126(2):413; author reply 413-4. doi: 10.1016/j.jaci.2010.04.040. No abstract available. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Medication Usage	The Unit of Measure is Efficacy. The primary outcome of this study is to determine if vitamin D supplementation reduces the medication usage in subjects with CUA. Thus, for the outcome of reduction in pills, at 12 weeks, subjects whose pill usage decreases by 2 or more pills per day will be classified as improved. Subjects whose pill consumption did not change or increased will be classified as unchanged.	12 week intervention
Secondary	Total Urticaria Severity Score at 3 Months	The Unit of Measure is Efficacy. The Total Urticaria Severity Score (USS) ranges from 0 to 93, higher scores = worse symptoms. This secondary outcome of this study is to determine if high dose vitamin D supplementation improves the urticaria severity score (USS). The change in USS will be compared between the groups using the independent sample t-test (assuming the distribution is normal). Logistic regression and multiple linear regression will be used to adjust for possible confounders.	3 month intervention
Secondary	Number of Participants With Adverse Events	Unit of Measure is Safety and Tolerability. The number of participants with adverse events will be compared between the groups using the independent sample t-test (assuming the distribution is normal).	3 month study trial