Abstract
BackgroundKOB03 is a polyherbal medicine that originated from the oriental prescription for the treatment of chronic allergic diseases such as rhinitis and asthma. This study aims to evaluate the effect of KOB03 on ovalbumin (OVA)-induced allergic rhinitis (AR) in guinea pigs.MethodsHartley guinea pigs were sensitized to OVA by intraperitoneal injection on days 0, 7, and 14 and challenged with intranasal exposure to OVA three times for 7 days after the last sensitization. KOB03 at doses of 200 and 500 mg/kg were orally administrated to guinea pigs once daily during challenge. The serum levels of histamine, OVA-specific immunoglobulin (Ig) E, eosinophil cationic protein (ECP) and cytokines (TNF-α, IL-4 and IFN-γ) in OVA sensitization/challenge-induced AR guinea pigs were measured. We also observed histological changes in nasal tissues of AR guinea pigs by staining with H&E, Periodic acid-Schiff, and toluidine blue.ResultsThe administration of KOB03 at a dose of 500 mg/kg significantly decreased the serum levels of histamine (P = 0.001), OVA-specific IgE (P = 0.0017), ECP (P = 0.008), and TNF-α (P = 0.0003) in OVA-sensitized/challenged guinea pigs compared with controls. KOB03 significantly decreased the serum levels of a Th2 cytokine, IL-4 (P = 0.017), while significantly increasing the levels of a Th1 cytokine, IFN-γ (P = 0.0006) in OVA-sensitized/challenged guinea pigs compared with controls. In addition, KOB03 suppressed the epithelial destruction, goblet cell hyperplasia and eosinophilic infiltration into nasal mucosa associated with AR.ConclusionKOB03 may regulate allergic inflammation in AR by inhibiting nasal damage, the release of allergic mediators and modulating the balance of Th1/Th2 cytokines.
Highlights
KOB03 is a polyherbal medicine that originated from the oriental prescription for the treatment of chronic allergic diseases such as rhinitis and asthma
Allergic mediators To demonstrate the effect of KOB03 on allergic responses in vivo, we measured the levels of allergic mediators, histamine, OVA-specific Immunoglobulin E (IgE), and eosinophil cationic protein (ECP) in the sera of OVA sensitization/challenge-induced allergic rhinitis (AR) guinea pigs
Sensitization/challenge of OVA in guinea pigs induced a significant increase in the production of histamine (Figure 2A; P = 0.0044), OVA-specific IgE
Summary
KOB03 is a polyherbal medicine that originated from the oriental prescription for the treatment of chronic allergic diseases such as rhinitis and asthma. Allergic rhinitis (AR) is an immunoglobulin (Ig) Emediated inflammatory disease caused by the inflammation of airway mucosa with hypersensitivity resulting from seasonal or perennial responses to specific allergens. It is characterized by a local influx of eosinophils with clinical symptoms including nasal rubbing, sneezing, rhinorrhea, lacrimation, nasal congestion and obstruction [1,2]. KOB03 (Table 1) is a polyherbal medicine derived from the oriental prescription for the treatment of hyperhidrosis and allergic diseases such as rhinitis, asthma and itching [8,9,10,11]
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