Biyuanling suppresses the toluene-2, 4-diisocyanate induced allergic rhinitis in guinea pigs
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Meixian Xiang1, Li Wu1, Hanwen Su2, Bing Han3, Huanxiang Liu2, Xincai Xiao1, Xian Yin1, Ya Fan1, Lang Zhang1, Yuying Huang1, Lei Zhao4 and Guangzhong Yang1
1School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
2Renmin Hospital of Wuhan University, 430060, Wuhan, PR China
3Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
4Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong university of Science and Technology, Wuhan, China, 430022, PR China
Meixian Xiang, email: email@example.com
Lei Zhao, email: firstname.lastname@example.org
Guangzhong Yang, email: email@example.com
Keywords: BLG; allergic rhinitis; SP; TNF-α; VCAM-1
Received: August 29, 2017 Accepted: November 13, 2017 Published: December 08, 2017
Allergic rhinitis (AR), one of the common diseases of the upper respiratory system, is associated with high risk of nasopharyngeal carcinoma. Biyuanling Granules (BLG), a formulated preparation of traditional Chinese medicine, has been used in China for treatment of AR for more than a decade; however, its exact action against allergic rhinitis and the mechanism involved remain unclear. In this study, we studied the effects of BLG on allergic rhinitis induced by toluene-2, 4- diisocyanate (TDI) in guinea pigs. The anti-AR effects of BLG were evaluated by behavior observations, histological examinations of the nasal tissues stained with hematoxylin and eosin staining (H&E), immunohistochemical analyses of pulmonary surfactant associated protein (SP), Bcl-2 Associated X Protei (Bax), tumor necrosis factor (TNF-α) and vascular cell adhesion molecule-1 (VCAM-1) in the nasal mucosa, and serum tests of interleukin-4 (IL-4) and human SARS-specific immunoglobulin (SIgE) levels. We observed that in the AR-positive animals treated with BLG, the symptom scores were significantly higher (P < 0.01), the nasal mucosa edemas and inflammatory infiltrates were significantly alleviated (P < 0.01) and the serum IL-4 and SIgE levels were significantly decreased (P < 0.05) as compared with the control group. Immunohistochemical examinations of the nasal mucosa demonstrated that the expressions of TNF-α, SP and VCAM-1 were significantly decreased (P < 0.01), whereas Bax expression was increased in the BLG treatment groups (P < 0.05). These results indicate that BLG can effectively suppress the TDI-induced AR, and that the protective effects of BLG were associated with reductions of TNF-α, SP and VCAM-1, and an elevation of Bax, suggesting that BLG exerts its AR-suppressive effects through inhibition of inflammatory response.
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