PMID- 29484729 OWN - NLM STAT- MEDLINE DCOM- 20180820 LR - 20201209 IS - 1099-1573 (Electronic) IS - 0951-418X (Linking) VI - 32 IP - 6 DP - 2018 Jun TI - Pinus densiflora bark extract ameliorates 2,4-dinitrochlorobenzene-induced atopic dermatitis in NC/Nga mice by regulating Th1/Th2 balance and skin barrier function. PG - 1135-1143 LID - 10.1002/ptr.6061 [doi] AB - Korean red pine (Pinus densiflora) bark has been traditionally used in Korea and other parts of East Asia to relieve inflammatory diseases. Although many studies using P. densiflora bark have been reported, its effect on atopic dermatitis (AD) has not been elucidated. Thus, we investigated whether the P. densiflora bark extract (PBE) has potential to attenuate AD symptoms and elucidated the molecular mechanism. Oral administration of PBE to mice with 2,4-dinitrochlorobenzene (DNCB)-induced AD lessened dermatitis scores and scratching behavior and significantly reduced measures of epidermal thickness, infiltration of mast cells and eosinophils, levels of immunoglobulin E (IgE), and IgG(1) /IgG(2a) ratio in serum. PBE not only inhibited IL-4, IL-5, and IL-13 but also increased IFN-gamma in splenic production. Furthermore, PBE significantly suppressed mRNA expression of thymic stromal lymphopoietin and further downregulated the mRNA expression of Th2 and Th17 cytokines such as IL-4, IL-13, IL-17, IL-31, and TNF-alpha. In addition, the protein expressions of filaggrin, involucrin, and loricrin in lesional skin were recovered by PBE. These results suggest that PBE attenuates DNCB-induced AD via regulating Th1/Th2 balance and skin barrier function. CI - Copyright (c) 2018 John Wiley & Sons, Ltd. FAU - Lee, Jun Woo AU - Lee JW AUID- ORCID: 0000-0003-1716-3386 AD - Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. FAU - Wu, Qianwen AU - Wu Q AUID- ORCID: 0000-0002-7475-3457 AD - Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. FAU - Jang, Young Pyo AU - Jang YP AUID- ORCID: 0000-0001-5865-9228 AD - Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. AD - Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. FAU - Choung, Se Young AU - Choung SY AUID- ORCID: 0000-0001-7619-6263 AD - Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. AD - Department of Preventive Pharmacy and Toxicology, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. LA - eng PT - Journal Article DEP - 20180227 PL - England TA - Phytother Res JT - Phytotherapy research : PTR JID - 8904486 RN - 0 (Dinitrochlorobenzene) SB - IM MH - Animals MH - Dermatitis, Atopic/*chemically induced MH - Dinitrochlorobenzene/*adverse effects MH - Male MH - Mice MH - Skin/*drug effects MH - Th1-Th2 Balance/*genetics OTO - NOTNLM OT - NC/Nga mice OT - Pinus densiflora OT - Th1 OT - Th2 OT - atopic dermatitis OT - filaggrin EDAT- 2018/02/28 06:00 MHDA- 2018/08/21 06:00 CRDT- 2018/02/28 06:00 PHST- 2017/11/20 00:00 [received] PHST- 2018/01/05 00:00 [revised] PHST- 2018/01/17 00:00 [accepted] PHST- 2018/02/28 06:00 [pubmed] PHST- 2018/08/21 06:00 [medline] PHST- 2018/02/28 06:00 [entrez] AID - 10.1002/ptr.6061 [doi] PST - ppublish SO - Phytother Res. 2018 Jun;32(6):1135-1143. doi: 10.1002/ptr.6061. Epub 2018 Feb 27.