A single-center, randomized double-blind placebo-controlled study evaluating the effects of poly-gamma-glutamate on human NK cell activity after an 8-week oral administration in healthy volunteers

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dc.contributor.authorK S Kim-
dc.contributor.authorTae Young Lee-
dc.contributor.authorJ H Hong-
dc.contributor.authorA Kim-
dc.contributor.authorS J Kim-
dc.contributor.authorJ C Choi-
dc.contributor.authorM H Sung-
dc.contributor.authorHaryoung Poo-
dc.date.accessioned2017-04-19T09:50:30Z-
dc.date.available2017-04-19T09:50:30Z-
dc.date.issued2013-
dc.identifier.issn1741427X-
dc.identifier.uri10.1155/2013/635960ko
dc.identifier.urihttps://oak.kribb.re.kr/handle/201005/11806-
dc.description.abstractA randomized double-blind placebo-controlled immunity study involving 99 healthy volunteers was performed to investigate the effect of poly-γ-glutamate (γ-PGA) on human natural killer (NK) cell activity in peripheral blood. The volunteers were randomly assigned to one of three groups and orally treated with solutions (25 mL) containing 0 mg (placebo), 250 mg (low dosage), or 500 mg (high dosage) of γ-PGA. Each volunteer took one dose every 12 hours for 8 weeks. Blood samples were drawn before the initial treatment and at the 4th and the 8th weeks of treatment. NK cell activity was assessed by measuring its degranulation, cytokine production, and cytotoxicity against the K562 cell line. Our results revealed that the cytotoxic activities of NK cells from the high-dosage γ-PGA group were significantly higher (P<0.05 for all comparisons) compared to the low dosage and placebo groups at weeks 4 and 8 after the initial treatment. This increase in the NK cell activity among peripheral blood mononuclear cells (PBMCs) of healthy individuals was also confirmed in vitro (as assessed by the degranulation and cytokine production). These results suggest that the oral administration of γ-PGA induces a cell-mediated immunity by increasing the NK cell activity in humans.-
dc.publisherHindawi Ltd-
dc.titleA single-center, randomized double-blind placebo-controlled study evaluating the effects of poly-gamma-glutamate on human NK cell activity after an 8-week oral administration in healthy volunteers-
dc.title.alternativeA single-center, randomized double-blind placebo-controlled study evaluating the effects of poly-gamma-glutamate on human NK cell activity after an 8-week oral administration in healthy volunteers-
dc.typeArticle-
dc.citation.titleEvidence-Based Complementary and Alternative Medicine-
dc.citation.number0-
dc.citation.endPage635960-
dc.citation.startPage635960-
dc.citation.volume2013-
dc.contributor.affiliatedAuthorHaryoung Poo-
dc.contributor.alternativeName김경수-
dc.contributor.alternativeName이태영-
dc.contributor.alternativeName홍장희-
dc.contributor.alternativeName김아롬-
dc.contributor.alternativeName김성진-
dc.contributor.alternativeName최재철-
dc.contributor.alternativeName성문희-
dc.contributor.alternativeName부하령-
dc.identifier.bibliographicCitationEvidence-Based Complementary and Alternative Medicine, vol. 2013, pp. 635960-635960-
dc.identifier.doi10.1155/2013/635960-
dc.description.journalClassY-
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Division of Research on National Challenges > Infectious Disease Research Center > 1. Journal Articles
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