[Role of P-JNK and P-c-Jun of JNK transduction pathway on the nasal mucosa remodeling in allergic rhinitis rats].

Objective: To study the role of P-JNK and P-c-Jun of JNK (c-Jun N-terminal kinase) on nasal mucosa remodeling in allergic rhinitis rats.

Method: Sixty male Wistar rats (weighing about 200-250 g) were randomly divided into AR group (A group) and B group(control group). The rats in A group were sensitized for inducing AR by intraperitoneal injection of ovalbumin and Al(OH)₃. Rats in group A were randomized into A4, A8 and A12 group (each had 10 rats). Ovalbumin was dropped in each nasal cavity of every rat for 4,8,12 weeks, respectively. Rats in group B were sensitized by saline instead of OVA, and were also divided into B4, B8 and B12 group. Each group had 10 rats. Pathological changes of nasal mucosa in each period were observed by hematoxylin and eosin stain dyeing. The phosphorylation of JNK and c-Jun were tested by immunohistochemistry.

Result: In A8 group, mucosal congestion and edema thickening with inflammatory cells infiltration of eosinophils were observed in the eighth week, and the inflammatory changes were significantly increased as time went on. The mean absorbance values of P-JNK and P-c-Jun in A group were significantly higher than those in the corresponding B group (all P < 0.01). Moreover, the mean absorbance values of A12 group were significantly higher than A4 group and A8 group (all P < 0.01 ).

Conclusion: The expression of P-JNK and P-c-Jun in the process of nasal mucosa remodeling in allergic rhinitis rats were increased, which suggested that P-JNK and P-c-Jun played important roles in nasal mucosa remodeling of the allergic rhinitis rats.