Fig. 4

The severity scores of vascular congestion in submucosa (A) and light microscopic images of H&E staining in nasal section (B–D; ×200 magnification). (B) Control group shows minimal to mild degree of vascular congestion. (C) PAF-induced AR groups shows moderate degree of vascular congestion. (D) PAF-induced AR with TRF treatment group shows minimal degree of vascular congestion. The subjective scoring represents 0: no significant abnormalities; 1: minimal; 2: mild; 3: moderate; 4: marked; 5: severe. Data are representative of mean ± standard error (n = 19); *p < 0.05. AR, Allergic rhinitis; H&E, Hematoxylin and eosin; PAF, Platelet-activating factor; TRF, Tocotrienol-rich fraction