Clinical effects of lactobacillus acidophilus strain L-55-contained yogurt on symptoms of Japanese cedar pollen allergy

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Abstract

Background: It has been reported that oral administration of Lactobacillus acidophilus strain L-55 (L-55) suppressed nasal symptom and antigen-specific IgE induced by antigen challenge in mice. We investigated clinical effects of L-55-contained yogurt on symptoms and IgE production in the patients with Japanese cedar pollinosis. Method: The study was performed as a randomized double blind placebo-controlled trial. L-55-contained yogurt (L-55 yogurt) or placebo yogurt was started to administer to each subject from 4 weeks prior to the onset of Japanese cedar pollen release for total 13 weeks. Result: The mean value of symptom score and symptom medication score were lower in L-55 yogurt group compared with placebo yogurt group during 5th week to 9th week from the first week of Japanese cedar pollination. Especially, in medicated subjects, total symptom score and throat symptom score were significantly lower in L-55 yogurt group compared with placebo yogurt group at 5th and 4 th week from the first week of Japanese cedar pollination, respectively. Moreover, in medicated subjects, change ratio of serum total IgE was significantly lower in L-55 yogurt group compared with placebo yogurt group at 1st week from the first week of Japanese cedar pollination. Conclusion: Intake of L-55 during Japanese cedar pollinating season may be effective in alleviating the allergic symptoms related to Japanese cedar pollinosis. From these finding, it was suggested that L-55 is a possible candidate as a complementary medicine for Japanese cedar pollinosis. © 2012 Japanese Society of Allergology.

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APA

Kimura, G., Akagi, H., Okada, C., Hirano, A., Amano, Y., Ohmura, E., … Takahashi, K. (2012). Clinical effects of lactobacillus acidophilus strain L-55-contained yogurt on symptoms of Japanese cedar pollen allergy. Japanese Journal of Allergology, 61(5), 628–641. https://doi.org/10.15036/arerugi.61.628

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