Abstract

Zingiber zerumbet (L) Smith is part of the Zingiberaceae family, one of the largest families of the plant kingdom. Z. zerumbet is a perennial, aromatic and tuberose plant that grows in humid locations where its center of distribution is located in the South-East Asia region. This plant has been traditionally used in foods and beverages and for ornamental purposes. Although many studies have reported on the biomedical applications of Z. zerumbet, the anti-allergic effects of Z. zerumbet and its major bioactive compounds have not yet been summarized in detail. Many major metabolites that have been reported to contain anti-allergic properties are terpene compounds which can be found in the essential oil extracted from the rhizomes of Z. zerumbet, such as zerumbone, limonene, and humulene. The rhizome is among the part of Z. zerumbet that has been widely used for many studies due to its exceptional biomedical applications. Most of these studies have shown that the essential oil, which can be obtained through hydro-distillation of the rhizomes from Z. zerumbet, is enriched with various active metabolites. Therefore, this mini-review provides an overview of the main aspects related to the anti-allergic and immunomodulatory properties of the major bioactive compounds found in the essential oils extracted from the rhizomes of Z. zerumbet, with the aim of demonstrating the importance of essential oil extracted from the rhizomes of Z. zerumbet and its bioactive compounds in the treatment of allergy and allergy-related diseases, in addition to other widely reported and extensively studied biomedical applications.

Highlights

  • Zingiberaceae is the largest families of the plant kingdom

  • Apart from zerumbone (35.5–84.8%), the other major compounds that can be found in the essential oils extracted from the rhizomes of Z. zerumbet are pinene (10.3–31.4%), humulene (10.03–17.23%), linalool (7.7–17.1%), caryophyllene (6.9–10.2%), borneol (4.78%), and limonene (0.8–1.3%) (Figure 1)

  • Since many major bioactive compounds found in the essential oil extracted from the rhizomes of Z. zerumbet have been shown to be effective in treating allergic responses, it would be important to know whether the doses used in these studies are practical to be translated into clinical studies

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Summary

INTRODUCTION

Zingiberaceae is the largest families of the plant kingdom. Its plants tend to be high in medicinal values and provide many useful products for food, spices, medicines, dyes, perfume and esthetics (Jantan et al, 2003; Koga et al, 2016). Caryophyllene was able to significantly inhibit the picryl chloride-induced delayed type hypersensitivity (DTH) response in mice, when given orally (100–300 mg/kg), as evidenced by decreased measurements in the ear thickness of mice (Jin et al, 2011) These findings concluded that caryophyllene exerts anti-allergic activity against mast cell degranulation and offers immune modulatory effects against DTH. These findings have shown that limonene may be beneficial as a prophylactic and therapeutic agent for asthma in the future

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