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Journal of Integrative Medicine: Volume 11, 2013   Issue 3,  Pages: 195-205

DOI: 10.3736/jintegrmed2013029
Research Article
Constituents of the anti-asthma herbal formula ASHMITM synergistically inhibit IL-4 and IL-5 secretion by murine Th2 memory cells, and eotaxin by human lung fibroblasts in vitro
1. Bolleddula Jayaprakasam (Center for Chinese Herbal Therapy for Asthma and Allergy, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA )
2. Nan Yang (Center for Chinese Herbal Therapy for Asthma and Allergy, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA )
3. Ming-Chun Wen (Department of Pneumology, Weifang Asthma Hospital, Weifang 261041, Shandong Province, China )
4. Rong Wang (Department of Human Genetics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA )
5. Joseph Goldfarb (Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA )
6. Hugh Sampson (Center for Chinese Herbal Therapy for Asthma and Allergy, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA )
7. Xiu-Min Li (Center for Chinese Herbal Therapy for Asthma and Allergy, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA E-mail: xiu-min.li@mssm.edu)

OBJECTIVE: Anti-asthma herbal medicine intervention (ASHMITM), a combination of three traditional Chinese medicinal herbs developed in our laboratory, has demonstrated efficacy in both mouse models of allergic asthma, and a double-blind placebo-controlled clinical trial in patients with asthma. This study was designed to determine if the anti-inflammatory effects of individual herbal constituents of ASHMITM exhibited synergy.

METHODS: Effects of ASHMI and its components aqueous extracts of Lingzhi (Ganoderma lucidum), Kushen (Sophora flavescens) and Gancao (Glycyrrhiza uralensis), on Th2 cytokine secretion by murine memory Th2 cells (D10.G4.1) and eotaxin-1 secretion by human lung fibroblast (HLF-1) cells were determined by measuring levels in culture supernatants by enzyme-linked immunosorbent assay. Potential synergistic effects were determined by computing interaction indices from concentration-effect curve parameters.

RESULTS: Individual Lingzhi, Kushen and Gancao extracts and ASHMI (the combination of individual extracts) inhibited production of interleukin (IL)-4 and IL-5 by murine memory Th2 cells and eotaxin-1 production by HLF-1 cells. The mean 25%-inhibitory-concentration (IC25) values (mg/mL) for ASHMI, Lingzhi, Kushen and Gancao for IL-4 production were 30.9, 79.4, 123, and 64.6, respectively; for IL-5 production were 30.2, 263, 123.2 and 100, respectively; for eotaxin-1 were 13.2, 16.2, 30.2, and 25.1, respectively. The IC50 values (mg/mL) for ASHMI, Lingzhi, Kushen and Gancao for IL-4 production were 158.5, 239.9, 446.7, and 281.8, respectively; for eotaxin-1 were 38.1, 33.1, 100, and 158.5, respectively. The interaction indices of ASHMI constituents at IC25 were 0.35 for IL-4, 0.21 for IL-5 and 0.59 for eotaxin-1. The interaction indices at IC50 values were 0.50 for IL-4 and 0.62 for eotaxin-1 inhibition. Inhibition of IL-5 did not reach IC50 values. All interaction indices were below 1 which indicated synergy.

CONCLUSION: By comparing the interaction index values, we find that constituents in ASHMITM synergistically inhibited eotaxin-1 production as well as Th2 cytokine production.

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Please cite this article as:
Jayaprakasam B, Yang N, Wen MC, Wang R, Goldfarb J, Sampson H, Li XM. Constituents of the anti-asthma herbal formula ASHMITM synergistically inhibit IL-4 and IL-5 secretion by murine Th2 memory cells, and eotaxin by human lung fibroblasts in vitro. J Integr Med. 2013; 11(3): 195-205.
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