Chang'an II Decoction ( II )-Containing Serum Ameliorates Tumor Necrosis Factor-α-Induced Intestinal Epithelial Barrier Dysfunction via MLCK-MLC Signaling Pathway in Rats.
10.1007/s11655-019-3034-6
- Author:
Ting CHEN
1
;
Xiao-Lan YIN
2
;
Nan KANG
3
;
Xiao-Ge WANG
4
;
Bao-Shuang LI
1
;
Hai-Jie JI
1
;
Yin-Qiang ZHANG
5
;
Li-Qun BIAN
1
;
Bei-Hua ZHANG
1
;
Feng-Yun WANG
1
;
Xu-Dong TANG
6
Author Information
1. Department of Gastroenterology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, 100091, China.
2. Graduate School of China Academy of Chinese Medical Sciences, Beijing, 100700, China.
3. Department of Internal Medicine, Jining Medical College Affiliated Hospital, Jining, 272029, Shandong Province, China.
4. Department of Gastroenterology, Henan University of Chinese Medicine Affiliated Hospital, Zhengzhou, 136300, China.
5. Department of Liver Diseases, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, 100091, China.
6. Department of Gastroenterology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, 100091, China. txdly@sina.com.
- Publication Type:Journal Article
- Keywords:
Chang’an II Decoction;
drug-containing serum;
intestinal epithelial cells;
myosin light chain kinase-myosin light chain;
signaling pathway;
tight junction;
tumor necrosis factor-α
- From:
Chinese journal of integrative medicine
2020;26(10):745-753
- CountryChina
- Language:English
-
Abstract:
OBJECTIVE:To investigate the effect of Chang'an II Decoction ( II ))-containing serum on intestinal epithelial barrier dysfunction in rats.
METHODS:Tumor necrosis factor (TNF)-α-induced injury of Caco-2 monolayers were established as an inflammatory model of human intestinal epithelium. Caco-2 monolayers were treated with blank serum and Chang'an II Decoction-containing serum that obtained from the rats which were treated with distilled water and Chang'an II Decoction intragastrically at doses of 0.49, 0.98, 1.96 g/(kg·d) for 1 week, respectively. After preparation of containing serum, cells were divided into the normal group, the model group, the Chang'an II-H, M, and L groups (treated with 30 ng/mL TNF-α and medium plus 10% high, middle-, and low-doses Chang'an II serum, respectively). Epithelial barrier function was assessed by transepithelial electrical resistance (TER) and permeability of fluorescein isothiocyanate (FITC)-labeled dextran. Transmission electron microscopy was used to observe the ultrastructure of tight junctions (TJs). Immunofluorescence of zonula occludens-1 (ZO-1), claudin-1 and nuclear transcription factor-kappa p65 (NF-κ Bp65) were measured to determine the protein distribution. The mRNA expression of myosin light chain kinase (MLCK) was measured by real-time polymerase chain reaction. The expression levels of MLCK, myosin light chain (MLC) and p-MLC were determined by Western blot.
RESULTS:Chang'an II Decoction-containing serum significantly attenuated the TER and paracellular permeability induced by TNF-α. It alleviated TNF-α-induced morphological alterations in TJ proteins. The increases in MLCK mRNA and MLCK, MLC and p-MLC protein expressions induced by TNF-α were significantly inhibited in the Chang'an II-H group. Additionally, Chang'an II Decoction significantly attenuated translocation of NF-κ Bp65 into the nucleus.
CONCLUSION:High-dose Chang'an II-containing serum attenuates TNF-α-induced intestinal barrier dysfunction. The underlying mechanism may be involved in inhibiting the MLCK-MLC phosphorylation signaling pathway mediated by NF-κ Bp65.
