Daily intake of heat-killed Lactobacillus plantarum L-137 augments acquired immunity in healthy adults

Yoshitaka Hirose, Shinji Murosaki, Yoshihiro Yamamoto, Yasunobu Yoshikai, Tomomi Tsuru

    Research output: Contribution to journalArticle

    53 Citations (Scopus)

    Abstract

    Heat-killed Lactobacillus plantarum strain L-137 (HK-LP) is a potent inducer of IL-12 in vitro as well as in vivo in mice. HK-LP has been shown to suppress IgE production against food allergens, as well as tumor growth in mice, through IL-12 production, which induces the T helper (Th) 1 type immune response. To determine whether the intake of HK-LP influences immune function and the quality of life (QOL), a randomized, double-blind, placebo-controlled, parallel study was conducted in healthy subjects. Sixty subjects (30 men and 30 women, mean age 56.3 y) were randomly assigned to receive a capsule containing 10 mg of HK-LP daily or a matching capsule for 12 wk. Biomarkers for innate immunity such as the natural killer activity of peripheral blood mononuclear cells, neutrophil phagocytosis, and cell surface expression of CD64 on monocytes were measured every 4 wk. Biomarkers for acquired immunity such as concanavalin A (Con A)-induced proliferation, percentages of INF-γ and IL-4-producing cluster of differentiation (CD)4+ T cells (Th1:Th2 ratio), and the serum IgG4:IgG ratio were measured every 4 wk or at wk 0 and wk 12. Health-related QOL was assessed using a self-rating questionnaire with 26 items. Among the measured biomarkers, the percent change in Con A-induced proliferation and the Th1:Th2 ratio in the HK-LP group was greater than those in the control group (P = 0.036 and P = 0.002, respectively). The degree of improvement in QOL was higher in the HK-LP group than in the control group at wk 8 (P = 0.049) and tended to be higher at wk 12 (P = 0.092). These results suggest that a daily intake of HK-LP augments acquired immunity, especially Th1-related immune functions in healthy subjects, thereby improving the health-related QOL.

    Original languageEnglish
    Pages (from-to)3069-3073
    Number of pages5
    JournalJournal of Nutrition
    Volume136
    Issue number12
    Publication statusPublished - Dec 2006

    Fingerprint

    1-phenyl-6,7-dihydroxy-isochroman
    Lactobacillus plantarum
    Adaptive Immunity
    quality of life
    Hot Temperature
    Quality of Life
    heat
    biomarkers
    Biomarkers
    interleukin-12
    Interleukin-12
    concanavalin A
    Concanavalin A
    Capsules
    Healthy Volunteers
    Immunoglobulin G
    Cytophagocytosis
    Control Groups
    mice
    interleukin-4

    All Science Journal Classification (ASJC) codes

    • Medicine (miscellaneous)
    • Food Science

    Cite this

    Hirose, Y., Murosaki, S., Yamamoto, Y., Yoshikai, Y., & Tsuru, T. (2006). Daily intake of heat-killed Lactobacillus plantarum L-137 augments acquired immunity in healthy adults. Journal of Nutrition, 136(12), 3069-3073.

    Daily intake of heat-killed Lactobacillus plantarum L-137 augments acquired immunity in healthy adults. / Hirose, Yoshitaka; Murosaki, Shinji; Yamamoto, Yoshihiro; Yoshikai, Yasunobu; Tsuru, Tomomi.

    In: Journal of Nutrition, Vol. 136, No. 12, 12.2006, p. 3069-3073.

    Research output: Contribution to journalArticle

    Hirose, Y, Murosaki, S, Yamamoto, Y, Yoshikai, Y & Tsuru, T 2006, 'Daily intake of heat-killed Lactobacillus plantarum L-137 augments acquired immunity in healthy adults', Journal of Nutrition, vol. 136, no. 12, pp. 3069-3073.
    Hirose Y, Murosaki S, Yamamoto Y, Yoshikai Y, Tsuru T. Daily intake of heat-killed Lactobacillus plantarum L-137 augments acquired immunity in healthy adults. Journal of Nutrition. 2006 Dec;136(12):3069-3073.
    Hirose, Yoshitaka ; Murosaki, Shinji ; Yamamoto, Yoshihiro ; Yoshikai, Yasunobu ; Tsuru, Tomomi. / Daily intake of heat-killed Lactobacillus plantarum L-137 augments acquired immunity in healthy adults. In: Journal of Nutrition. 2006 ; Vol. 136, No. 12. pp. 3069-3073.
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