Dichroa Root

Generic name: Dichroa Febrifuga Lour
Brand names: Basak, Big Golden Sword, British Indian, Ch'ang Shan, Chi-fen Ts'ao, Chi-ku Ch'ang-shan, Chi-ku Feng, Chicken-bone Alum Root, Chicken-droppings Grass, Chinese Quinine, Dichroa Root, Huang Ch'ang-shan, Native Alum Root, Pai Ch'ang-shan, T'u Ch'ang-shan, Ta

Usage of Dichroa Root

Anti-inflammatory effects

Animal and in vitro data

In a study using rat liver, an aqueous extract of D. febrifuga root regulated inflammation-related proteins, suggesting a potential role in the management of inflammation.(Choi 2003) Similarly, in another study in lipopolysaccharide-stimulated macrophages, the aqueous extract exerted anti-inflammatory effects via inhibition of interleukin (IL)-1beta and IL-6 production in a dose-dependent manner without affecting cell viability.(Park 2009) In vivo and in vitro experiments have documented a synergestic effect between halofuginone and dexamethasone in reducing inflammation in acute lung injury more than either agent alone. The mechanism involved suppression of the NF-kappaB pathway and decreased proinflammatory cytokines (ie, tumor necrosis factor-alpha, IL-1beta, IL-23).(Du 2020)

Antimalarial activity

With drug resistance from medications such as Chloroquine and quinine becoming prevalent, researchers have sought other antimalarial sources. Isolates of D. febrifuga, febrifugine and isofebrifugine, were found to be the active components against malaria; however, chemists could not separate adverse effects (eg, nausea, vomiting, diarrhea) from their beneficial actions.(Burger 1999, Zeng 1982, Zhao 1986, Zhu 2012) Febrifugine exerts its antimalarial effects by impairing the haemazoin formation needed for parasite maturation at the trophozoite stage. Various analogues have been synthesized in an effort to minimize adverse effects and enhance bioavailability; some of these compounds have therapeutic indices greater than 10 times that of chloroquine.(McLaughlin 2014, Zhu 2009) One study suggested that increased lipophilicity of the analogues was associated with improved antimalarial activity.(Doctor's Manual 1977, Zhu 2012)

Animal and in vitro data

Febrifugine and isofebrifugine in certain preparations (eg, acetone extract) demonstrated high antimalarial activity against Plasmodium falciparum and Plasmodiumberghei.(Takaya 1999) In a study evaluating the effects of an aqueous extract of D. febrifuga against P. berghei in mice, a reduction in infection rate and an increase in mean survival time were observed.(Gopal 1982).Two reports suggest that dichroa extracts alter nitric oxide (NO) concentrations. In mice infected with P. berghei, febrifugine 1 mg/kg/day orally reduced mortality and parasitemia, and increased NO production and plasma concentration, thus contributing to host defense against malaria infection.(Murata 1999) In an in vivo study, febrifugine significantly enhanced NO production in mouse peritoneal macrophages, with dose-dependent activations.(Murata 1998) However, another study investigating the effects of an aqueous extract of D. febrifuga root demonstrated a decrease in NO production as well as tumor necrosis factor, which plays a role in endotoxin-mediated shock and inflammation. In mouse macrophages, NO synthase and NO serum levels were decreased, suggesting suppression of inflammatory response and possible use as an anti-inflammatory.(Kim 2000)

Other uses

Changrolin, a Chinese antiarrhythmic drug derived from dichroa, has been studied for its antiarrhythmic effects in small mammal cardiac cells.(Chen 2010, Lu 1995)

In a study testing synthetic febrifugine analogues, cytotoxic effects against cancer cells lines (KB, MCF7, LU1, and HepG2) were observed.(Mai 2014) In vitro testing demonstrated potential tumoricidal properties associated with dichroa root.(Mazzio 2009)

In one study, febrifugine analogues exerted activity against Leishmania donovani parasites,(Pandey 2017) while anti-Schistomsoma activity was documented with febrifugine in which both egg production and adult worms were eliminated in vitro.(Mitsui 2020)

Antifibrotic properties of halofuginone have also been described(Du 2020) with in vitro and in vivo studies demonstrating protection against intestinal fibrosis,(Duan 2020), osteoarthritis,(Mu 2018) excessive fibrocartilage development in chondrocytes,(Li 2017) and intervertebral disc degeneration.(Luo 2018)

Dichroa Root side effects

Nausea, vomiting, and diarrhea have been reported.Burger 1999 Dichroa root may cause hepatotoxicity.Mojab 2012, Zhu 2012, Zhu 2009

Before taking Dichroa Root

Avoid use. Information regarding safety and efficacy in pregnancy and lactation is lacking.

How to use Dichroa Root

There are no recent clinical studies of dichroa root to provide dosing recommendations.

Warnings

Information regarding toxicity with use of dichroa root is lacking.

What other drugs will affect Dichroa Root

None well documented.

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