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- Title
Anti-inflammatory Effects of Phyllanthus emblica L on Benzopyrene-Induced Precancerous Lung Lesion by Regulating the IL-1β/miR-101/Lin28B Signaling Pathway.
- Authors
Wang, Cheng-cheng; Yuan, Jia-rui; Wang, Chun-fei; Yang, Nan; Chen, Juan; Liu, Dan; Song, Jie; Feng, Liang; Tan, Xiao-bin; Jia, Xiao-bin
- Abstract
Background. Phyllanthus emblica L (PEL), a well-known medical plant, has been used in Asian countries for a long time. Increasing evidence suggests that it can prevent the tumorigenesis of cancer associated with nonresolving inflammation. However, the possible anti-inflammatory mechanism responsible for preventing tumorigenesis of precancerous lung lesions is not well elucidated. Materials and methods. Male A/J mice were randomly divided into 5 groups with 10 mice in each group: (1) blank group (saline), (2) benzo(a)pyrene [B(a)P] group, (3) and (4) B(a)P + PEL (5 g/kg/d, 10 g/kg/d, administered by gavage), (5) B(a)P + celecoxib (30 mg/kg/d, administered by gavage). Nodes on the lung surface were observed and calculated. The levels of macrophage inflammatory protein (MIP-2), tumor necrosis factor-α (TNF-α), interleukin (IL)-6, and IL-1β were detected by enzyme-linked immunosorbent assay (ELISA) kits. Cyclo-oxygenase-2 (COX-2), hypoxia-inducible factor-1 (HIF-α), IL-1β, miR-101, and Lin28B protein levels were evaluated by immunohistochemistry and Western blotting. Results. PEL extract treatment significantly reduced the number of nodes on the lung surface and attenuated B(a)P-induced levels of proinflammatory cytokines MIP-2, TNF-α, IL-6, and IL-1β in lung tissue. The protein expressions of COX-2 and HIF-α were significantly decreased by the treatment of PEL. In addition, both PEL extract and celecoxib markedly upregulate the expression of miR-101 while downregulating IL-1β and Lin28B levels. Conclusion. Our study indicated that treatment with PEL extract can not only protect the lung from inflammatory injury but effectively prevent precancerous lung lesions through regulating the IL-1β/miR-i101/Lin28B signaling pathway.
- Subjects
TUMOR prevention; TREATMENT of lung tumors; ANIMAL experimentation; ARTIFICIAL feeding; CELLULAR signal transduction; CYTOKINES; ENZYME-linked immunosorbent assay; IMMUNOHISTOCHEMISTRY; MEDICINAL plants; MICE; MOLECULAR structure; NONSTEROIDAL anti-inflammatory agents; HEALTH outcome assessment; PRECANCEROUS conditions; TUMOR necrosis factors; WESTERN immunoblotting; PLANT extracts; CYCLOOXYGENASE 2
- Publication
Integrative Cancer Therapies, 2017, Vol 16, Issue 4, p505
- ISSN
1534-7354
- Publication type
Article
- DOI
10.1177/1534735416659358