Clinical Trial of 0.0003% Calcitriol, 0.1% Tacrolimus, and Petrolatum for the Treatment of Pityriasis Alba

Pityriasis Alba Clinical Trial

Official title:

A Double Blind Randomized Trial, Placebo-controled of 0.0003% Calcitriol Ointment Versus 0.1% Tacrolimus Ointment in the Treatment of Pityriasis Alba

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01388517
• Other study ID #: PA-CALTAC
• Status: Completed
• Phase: Phase 4
• First received: June 30, 2011
• Last updated: September 25, 2012
• Start date: January 2008
• Est. completion date: January 2011

Study information

• Verified date: September 2012
• Source: Universidad Autonoma de San Luis Potosí
• Contact: n/a
• Is FDA regulated: No
• Health authority: Mexico: Ministry of Health
• Study type: Interventional

Clinical Trial Summary

Pityriasis alba (PA) is a frequent cause of consultation in tropical areas due to its chronic course, trend to relapse and aesthetic impact. Currently, no treatment is widely accepted. The objective is to assess the calcitriol and tacrolimus ointment efficacy in the treatment of PA compared with petrolatum. Twenty lesions on the face greater than 3 cm, in individuals of phototype IV-V, aged 3-18 years are going to be randomly assigned to receive petrolatum, calcitriol, and tacrolimus twice daily. No photoprotection is going to be indicated, and hygienic habits will not be modified. Patients will be evaluated at baseline and for 9 weeks, by means of Transepidermal Water Loss (TEWL), colorimetry, clinically and by photography control.

Description:

Pityriasis alba (PA) is a benign inflammatory dermatosis affecting about 5% of infantile population, frequently seen in tropical areas of the world. This entity has received many synonymous such as chronic impetigo and erythema streptogenes, but its actual name was given from Hazen. PA is also considered a minor criterion for the diagnosis of atopic dermatitis. It is characterized by hypopigmented, irregular plaques with well-defined borders, covered by fine scales; it affects mainly face, limbs and occasionally thorax.

Its etiology is still unknown, although infectious mechanisms and vitamin and minerals deficiencies have been implicated, a causal relationship has not been recognized. However, excessive and unprotected sun exposure is considered the most important causal factor involved. However, studies from stratum corneum from of PA lesions have described defects in hygroscopicity and water-holding capacity detectable by water sorption-desorption test, this suggests that the condition is similar to a dermatitic change and its hypopigmentation may be consequence of a postinflammatory mechanism.

The study population will include at least 20 lesions in individuals with phototype IV-V, affected symmetrically by PA on the face. Their selected age will be less than 18 years. Patients with other dermatoses, including atopic dermatitis, use of any systemic or topical medication during the past 4 weeks will be excluded. Informed consent was obtained from the parents and children before entering the study, which was approved by the local ethical committee (Institutional Review Board).

Patients will be randomly assigned in a double-blind manner to receive on the lesions 0.0003% calcitriol (Galderma, France), 0.1% tacrolimus (Astellas, Pharma, USA), and petrolatum (Aquaphor ointment)in all of them. All subjects were instructed to apply the treatment twice daily. Sunscreen will not be indicated, and hygienic habits are not being changed. Hypopigmented areas are going to be initially evaluated and supervised at 3, 6 and 9 weeks. Digital photographic registration(frontal, right, and left views) with an SLR Fuji FinepixS1pro camera will be taken and analysed by ImageJ software to quantify the reduction area of the plaques. The methods of assessment involve clinical evaluation by investigators, an independent observer, and by the transepidermal water loss (TEWL) with an evaporimeter (Dermalab, Cortex Technology, Denmark), and pigmentary changes using a colorimeter (Chromameter CR-300, Minolta, Osaka, Japan). Water loss will be recorded on each plaque for 60 seconds, as well as the L* (luminosity) and a* (erythema) axis. All adverse effects will be recorded. Statistical analysis was performed using T student, the level of significance was set at 5%. And clinical evaluation will be analysed by means of chi square tests.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 39
• Est. completion date: January 2011
• Est. primary completion date: August 2010
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 2 Years to 18 Years

Eligibility

Inclusion Criteria:

• Diagnosis of Pityriasis alba with well defined lesions greater than 3 cm2.

Exclusion Criteria:

• Diagnosis of Atopic Dermatitis

• Skin disorders other than Pityriasis alba

• Systemic disorders

• Treatment during the last 8 weeks for this condition

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Dandruff
• Pityriasis Alba

Intervention

Drug:
• Tacrolimus
0.1% tacrolimus ointment to apply twice a day for 9 weeks on pytiriasis alba plaques.
• Calcitriol
0.0003% calcitriol ointment to apply twice a day for 9 weeks on pytiriasis alba plaques.
• Petrolatum
Petrolatum ointment to apply twice a day for 9 weeks on pytiriasis alba plaques.

Locations

Country	Name	City	State
Mexico	Dermatology Department. Hospital Central "Dr. Ignacio Morones Prieto"	San Luis Potosi

Sponsors (2)

Lead Sponsor	Collaborator
Universidad Autonoma de San Luis Potosí	Hospital Central "Dr. Ignacio Morones Prieto"

Country where clinical trial is conducted

Mexico, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Repigmentation of PA lesions measured by colorimetry	Quantification of the repigmentation of lesions by means of the L axis of the CIE system. 0 is pure white, 100 y total dark.	9 weeks	No
Secondary	Change in transepidermal water loss of PA lesions	Quantification of water loss measured by a evaporimeter in grams per squared meter per hour. Is an indirect measure of stratum corneum integrity.	6 weeks	No
Secondary	Investigator's repigmentation improvement	Clinical improvement is assessed by means of digital photographic registration (frontal, right, and left views). An independent observer clinically graded the global improvement as poor (0-25%), mild (26-50%), good (51-75%), and excellent (>75%).	9 weeks	No
Secondary	Reduction of the affected area by image analysis software	ImageJ software will be used to measure the lesion reduction area after treatments	9 weeks	No