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KMID : 1225720220140050549
Allergy, Asthma & Immunology Research : AAIR
2022 Volume.14 No. 5 p.549 ~ p.564
Bifidobacterium longum and Galactooligosaccharide Improve Skin Barrier Dysfunction and Atopic Dermatitis-like Skin
Kim Su-Kyung

Han Song-Yi
Lee Jin-Young
Kim Na-Rae
Lee Bo-Ra
Kim Hyun-Mi
Kwon Mi-Jeoung
Ahn Kang-Mo
Noh Young-Bae
Kim Sang-Jong
Lee Phy-Rim
Kim Dong-Ki
Kim Byung-Eui
Kim Ji-Hyun
Abstract
Purpose: The beneficial effects of a combination therapy using Bifidobacterium longum and galactooligosaccharide (GOS) for the treatment of atopic dermatitis (AD) have not been elucidated.

Methods: Gene expressions of interleukin (IL)-4 and IL-13 from peripheral blood mononuclear cells and fecal abundance of B. longum from 12-month-old infants were evaluated. Human primary epidermal keratinocytes (HEKs) and hairless mice were treated with B. longum, GOS, B. longum-derived extracellular vesicles (BLEVs), dinitrochlorobenzene (DNCB), or a synbiotic mixture of B. longum and GOS. Expression of epidermal barrier proteins and cytokines as well as serum immunoglobulin E (IgE) levels were analyzed in HEKs and mice. Dermatitis scores, transepidermal water loss (TEWL), epidermal thickness, and fecal B. longum abundance were evaluated in mice.

Results: Fecal abundance of B. longum was negatively correlated with blood IL-13 expression in infants. B. longum or BLEVs increased expression of filaggrin (FLG) and loricrin (LOR) in HEKs. B. longum increased the efficacy of GOS to upregulate FLG and LOR expressions in HEKs. Oral administration of GOS increased fecal abundance of B. longum in mice. Oral administration of B. longum attenuated DNCB-induced skin inflammation, abnormal TEWL, AD-like skin, and deficiency of epidermal barrier proteins. Moreover, the combination of B. longum and GOS showed greater effects to improve DNCB-induced skin inflammation, abnormal TEWL, AD-like skin, serum IgE levels, IL-4 over-expression, and the deficiency of epidermal barrier proteins than the administration of B. longum alone.

Conclusions: B. longum and GOS improve DNCB-induced skin barrier dysfunction and AD-like skin.
KEYWORD
Atopic dermatitis, Bifidobacterium longum, prebiotics, probiotics, synbiotics
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