title: Clinical effects of a hop water extract on Japanese cedar pollinosis during the pollen season: a double-blind, placebo-controlled trial.
abstract: The clinical effects of an oral administration of a hop water extract (HWE) on the improvement of Japanese cedar pollinosis (JCPsis) symptoms were investigated. In a double-blind, placebo-controlled trial, 39 subjects took a drink containing either 100 mg of HWE or a placebo for 12 weeks during the pollen season. Nasal symptoms (sneezing attacks, nasal discharge, and nasal obstruction) were assessed from the subjects' diaries. A clinical examination and blood sampling were carried out before and 4, 8 and 12 weeks after the initiation of treatment. As a result, a significant difference was observed in the symptom score and in the symptom-medication score 10 weeks after the intervention in comparison with the placebo group. Improvements were observed in nasal swelling, nasal color, amount of nasal discharge, and characteristics of nasal discharge in the intervention group 12 weeks after the treatment. No significant eosinophil infiltration into the nasal discharge was apparent in the intervention group throughout the study period, although it was observed in the placebo group. These findings indicate that an oral administration of HWE may be effective in alleviating the allergic symptoms related to JCPsis.
authors: Frontier Laboratories of Value Creation, Sapporo Breweries Ltd., Yaizu, Shizuoka, Japan. shuuichi.segawa@sapporobeer.co.jp
authors: Shuichi
authors: S
authors: Segawa
authors: Yoshihiro
authors: Y
authors: Takata
authors: Yoshihisa
authors: Y
authors: Wakita
authors: Takafumi
authors: T
authors: Kaneko
authors: Hirotaka
authors: H
authors: Kaneda
authors: Junji
authors: J
authors: Watari
authors: Tatsuko
authors: T
authors: Enomoto
authors: Tadao
authors: T
authors: Enomoto
mesh_terms: D000328:Adult; D018926:Anti-Allergic Agents / Q000627:therapeutic use; D032485:Cryptomeria / Q000276:immunology*; D004311:Double-Blind Method; D004804:Eosinophils / Q000187:drug effects; D005260:Female; D006801:Humans; D027582:Humulus / Q000737:chemistry*; D007564:Japan; D008297:Male; D010919:Placebos; D010936:Plant Extracts / Q000008:administration & dosage*; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*; D016896:Treatment Outcome
chemical_list: D018926:Anti-Allergic Agents; D010919:Placebos; D010936:Plant Extracts