Abstract:
ETHNOPHARMACOLOGICAL RELEVANCE:Tryptanthrin is a compound isolated from Polygonum tinctorium, which is a known folk medicine with various biological activities. AIM OF THE STUDY:Allergic diseases are initiated by the development of allergen-specific T helper type 2 (Th2) cells and amplified by the degranulation of and cytokine release from basophils and mast cells during an effector phase. We found that Tryptanthrin could down-regulate IL-4 production by Th2 cells, while IFN-γ production by Th1 cells was not affected. Since IL-4 produced by basophils and effector Th2 cells has been shown to play important roles in the development and amplification of Th2-dominated allergic responses, we examined the effects of Tryptanthrin on the initiation and effector phase responses of Type I allergy in vitro. MATERIALS AND METHODS:To determine the mechanisms of Tryptanthrin-induced down-regulation of IL-4 production, the expression of Th2-specific transcription factors, c-Maf and GATA-3, was analyzed by RT-PCR. The effects of Tryptanthrin on Th cell differentiation were evaluated using CD4(+) T cells purified from spleen cells of Sugi basic protein (SBP)-immunized BALB/c mice. In primary cultures, cells were stimulated with SBP and antigen-presenting cells under neutral or Th2-skewing conditions in the presence or absence of Tryptanthrin. Cytokines produced by differentiated Th cells in secondary cultures were analyzed by ELISA. The effects of Tryptanthrin on IgE-mediated degranulation and IL-4 production were determined using rat basophilic leukemia (RBL-2H3) cells. Phosphorylation of ERK1/2 and Akt in Tryptanthrin-treated RBL-2H3 cells was analyzed to determine the mechanism of Tryptanthrin actions. RESULTS:Tryptanthrin suppressed c-Maf mRNA expression in Th2 clone cells, and even under Th2-skewing conditions, Tryptanthrin inhibited differentiation toward the Th2 phenotype, which is an essential event for the initiation phase of allergic diseases. Tryptanthrin also inhibited the IgE-mediated degranulation of and IL-4 production by RBL-2H3 cells, probably due to inhibiting IgE-mediated signaling pathways, including the phosphorylation of ERK1/2 and Akt. CONCLUSION:These findings suggest that Tryptanthrin effectively inhibits the effector and exacerbation responses, as well as the initiator responses, of Type I allergy. Thus, Tryptanthrin may have beneficial effects for immediate-type allergic responses.
journal_name
J Ethnopharmacoljournal_title
Journal of ethnopharmacologyauthors
Iwaki K,Ohashi E,Arai N,Kohno K,Ushio S,Taniguchi M,Fukuda Sdoi
10.1016/j.jep.2010.12.041subject
Has Abstractpub_date
2011-03-24 00:00:00pages
450-9issue
2eissn
0378-8741issn
1872-7573pii
S0378-8741(10)00917-7journal_volume
134pub_type
杂志文章abstract:ETHNOPHARMACOLOGICAL RELEVANCE:Cedrus deodara (Roxb. ex D.Don) G. Don is applied as anti-inflammatory and anti-infection agents in folklore medicine. AIM OF THE STUDY:The present study aimed to assess the antimicrobial activity of Cedrus deodara (Roxb. ex D.Don) G. Don extract (CDE) against Streptococcus mutans biofil...
journal_title:Journal of ethnopharmacology
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journal_title:Journal of ethnopharmacology
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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journal_title:Journal of ethnopharmacology
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章,评审
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:1998-03-01 00:00:00
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journal_title:Journal of ethnopharmacology
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章,评审
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abstract:ETHNOPHARMACOLOGICAL RELEVANCE:In Brazil, a phytotherapeutic preparation produced from a standardized tincture of Cinchona calisaya Weddel such that each mL of product contains 400µg of quinine, known in Portuguese as Água Inglesa(®) (English water), is indicated by the manufacturer as a tonic, appetite stimulant, and ...
journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
doi:10.1016/j.jep.2008.08.018
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
doi:10.1016/j.jep.2015.03.082
更新日期:2015-06-20 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
doi:10.1016/j.jep.2011.04.047
更新日期:2011-06-22 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
doi:10.1016/j.jep.2006.11.019
更新日期:2007-05-04 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:2019-12-05 00:00:00
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journal_title:Journal of ethnopharmacology
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章,meta分析,评审
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journal_title:Journal of ethnopharmacology
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pub_type: 杂志文章
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:2017-07-12 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:2007-11-01 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:2002-09-01 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:2010-05-27 00:00:00
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journal_title:Journal of ethnopharmacology
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:2002-04-01 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
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更新日期:2017-03-22 00:00:00
abstract:ETHNOPHARMACOLOGICAL RELEVANCE:Calotropis gigantea R.Br. (Asclepiadaceae) is a perennial undershrub found chiefly in wastelands throughout India. It has been reported as a traditional folkloric medicine for a variety of alignments. The plant Calotropis gigantea is also used in some parts of India for wound healing in c...
journal_title:Journal of ethnopharmacology
pub_type: 杂志文章
doi:10.1016/j.jep.2009.06.007
更新日期:2009-08-17 00:00:00
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journal_title:Journal of ethnopharmacology
pub_type: 杂志文章,评审
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更新日期:2020-04-06 00:00:00