3. • AD is an important chronic or relapsing
inflammatory skin disease
• AD often precedes asthma and allergic
disorders
o More than 50% develop asthma
o 75% develop AR
• AD associated with local infiltration of Th 2
that secrete IL-4, IL-5, IL-13, IL-31
• Complex interrelationship of genetic,
environmental, immunologic, and
epidermal factor
What is Atopic Dermatitis?
Mark Boguniewicz, Donald Leung.Middleton’s Allergy 7’th edition 1 893-1999
5. Epidemiology
• Affects 15-30% of children, 2-10% of adult
• 60% begin during the first yr.
• 45% begin within the first 6 mo.
• 85% begin before 5 yrs.
• Up to 70%: spontaneous remission before adolescence
NJEM 2008;358:1483-94
16. Genetics of Atopic Dermatitis
• The concordance rate for
atopic dermatitis is higher
among monozygotic twins
(77%) than among dizygotic
twins (15%)
• atopic dermatitis–related loci
on chromosomes 3q21,11
1q21, 16q, 17q25, 20p,12 and
3p26
• 1q21, which harbors a family
of epithelium-related genes
called the epidermal
differentiation complex
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19. Atopic Dermatitis and the Skin Barrier
Patients with Atopic Dermatitis have Impaired Barrier Function
Transepidermal water loss (A) increase not only in lesional, but also in non-lesional skin of patients
normal controls, and hydration (B) is reduced.1
1. Aberg KM, et al. J Invest Dermatol 2008;128;917-925. 2. Jensen JM, et al. J Invest Dermatol
2004;122:1423-1431. 3. Chamlin SL, et al. J Am Acad Dermatol 2002;47:198-208 ที่มา:
http://www.epiceram.ca/physician/ad_skin_barrier.php 10/03/2015
20. • The skin produces the
cathelicidin LL-37; the human
β-defensins HBD-1, HBD-2,
and HBD-3; and dermcidin. The
inflammatory micromilieu
initiated by interleukin-4,
interleukin-13, and
interleukin- 10 down-regulates
these antimicrobial peptides in
the skin of patients with atopic
dermatitis.
Immunopathologic factors
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