Harpagoside-induced anaphylactic reaction in an IgE-independent manner both in vitro and in vivo.

Harpagoside-induced anaphylactic reaction in an IgE-independent manner both in vitro and in vivo.

Immunopharmacol Immunotoxicol. 2018 Jan 22;:1-6

Authors: Che D, Cao J, Liu R, Wang J, Hou Y, Zhang T, Wang N

Abstract
BACKGROUND: Harpagoside (HAR) is an active component of Scrophularia ningpoensis (SN), which has anti-inflammatory and anti-immune effects. SN is used widely in China to treat various diseases. Recently, SN has been used as a traditional Chinese medicine injection and used clinically. However, allergic responses to these injections are frequently reported.
AIM: We examined whether the main component of SN, HAR, is associated with the allergic reaction to SN.
METHODS: This study assessed the effects of HAR in mice and mast cell activation to characterize its anaphylactic effects and underlying mechanisms. Mice hindpaw swelling, serum allergy factor detection, enzyme-linked immunosorbent assays, and degranulation assays were performed to measure allergic mediators both in vivo and in vitro.
RESULTS: The present study indicated that HAR induced paw swelling, interleukin-6, inositol triphosphate, tumor necrosis factor-α, and histamine increases in mice. Our in vitro data also showed that HAR induced β-hexosaminidase, inositol triphosphate, and interleukin-6 release, leading to mast cell degranulation. In contrast, neither C48/80 nor HAR induced local anaphylaxis in STOCK KitW-sh/HNihrJaeBsmJNju mice.
CONCLUSIONS: HAR is a potential sensitization compound in SN, and these results provide information for the safe clinical use of SN.

PMID: 29355053 [PubMed - as supplied by publisher]

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