Narrowband ultraviolet B and medium-dose ultraviolet A1 are equally effective in the treatment of moderate to severe atopic dermatitis.
BACKGROUND
Phototherapy may be effective in atopic dermatitis (AD). Medium-dose (MD) ultraviolet (UV) A1 was introduced for the treatment of AD. Few immunohistochemical data are available pertaining to phototherapy in AD. Regulatory T cells may play a role in clearing AD.


OBJECTIVE
We sought to compare the clinical and immunohistochemical effects of narrowband (NB) UVB and MD UVA1 treatment in patients with AD.


METHODS
Thirteen adult patients with AD were included in this randomized investigator-blinded half-sided comparison study between NB UVB and MD UVA1. Disease activity was measured using the Leicester sign score. Skin biopsy specimens were taken before and after phototherapy. Regulatory T cells were stained with the forkhead box protein P3 (FoxP3).


RESULTS
NB UVB and MD UVA1 both significantly decreased AD severity (P < .01) and the dermal cellular infiltrate. The percentage of FoxP3(+)CD3(+) T cells did not change after NB UVB or MD UVA1 treatment.


CONCLUSIONS
MD UVA1 therapy was given 3 times per week instead of the preferred regimen of 5 times per week. This was necessary to achieve good blinding of the study.


CONCLUSIONS
NB UVB and MD UVA1 seem equally effective in the treatment of patients with moderate to severe AD. Neither MD UVA1 nor NB UVB had an effect on the percentage of FoxP3(+)CD3(+) T cells.
Majoie
I M Leonie
IM
Department of Dermatology and Allergology, University Medical Center Utrecht, The Netherlands.
Oldhoff
J Marja
JM
van Weelden
Huib
H
Laaper-Ertmann
Marloes
M
Bousema
Mente T
MT
Sigurdsson
Vigfus
V
Knol
Edward F
EF
Bruijnzeel-Koomen
Carla A F
CA
de Bruin-Weller
Marjolein S
MS
D000328:Adult; D003876:Dermatitis, Atopic / Q000473:pathology / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D016037:Single-Blind Method; D014467:Ultraviolet Therapy; D055815:Young Adult