Harvard scientists disclose the secrets of Chinese herbal remedy
THE SECRETS OF CHINESE HERBAL REMEDY CHANG SHAN DISCLOSED
There in the mountains, in the north-east of the Himalayas, grows a plant, Hydrangea, commonly known as Hortensia, that may have helped scientists and researchers from Harvard School of Dental Medicine to find the answer on how to treat autoimmune disorder, an inappropriate immune response of the body against substances and molecules naturally present in our bodies , but mistakenly confused by our natural defences with external pathogens, as in Lupus or psoriasis.
The researchers, lead by Malcolm Whitman, professor of developmental biology at Harvard School of Dental Medicine discovered that one of the active constituents found in the roots of Hydrangea, the halofuginone, blocked the development of Th17 cells, a type of cells present in many autoimmune disorder cases . But why did their research focused on Hydrangea?
DICHROA FEBRIFUGA (HYDRANGEA)
Common name: Hortensia, Chinese: 常山, Pinyin: chángshān, Ji Gu
HYDRANGEA ROOT EXTRACTS
Hydrangea root extracts were used under the name Chang shan since more than 2000 years ago in Chinese Traditional Herbal medicine against Malaria, an illness that continues to be a global health problem affecting millions and causing the death of thousands of persons every year.
CHANG SHAN SELF DEFENCE MECHANISM AGAINST HERBIVORES
Plant self-defense mechanism against herbivores has been developed over millenniums by some plants. Some of these mechanisms are very well developed while others are very basic.
Chang shan (Hydrangea) specimens collected in the Sichuan Province of China were used to find out the self-defence mechanism used by this plant, cyanogenic glucosides .
Cyanogenic glucosides are phytoanticipins known to be present in more than 2500 plant species. In Chang shan, as well as in other plant species, they play a very important role in its defence against herbivores.
Cyanogenic glucosides have a bitter taste and release of toxic hydrogen cyanide upon tissue disruption, something that is used by plants as a mechanism to deter herbivore predators.
Some specialized herbivores, especially insects, preferentially feed on cyanogenic plants. Such herbivores have acquired the ability to metabolize cyanogenic glucosides or to sequester them for use in their predator defence .
CHANG SHAN FOR MALARIA
In the 2008 World Health Organization (WHO) report World Malaria Report, about 247 million malaria cases were reported worldwide, 87% of those cases were reported in Africa.
This is mainly due to the fact that malaria parasite has been so far able to developed a certain resistance to the majority of the existing anti-malarial drugs , most of which are based on natural active constituents found in natural sources as artemisinin (Chinese Qinghaosu), quinine, hydroxynaphthoquinones, doxycycline, clindamycin, and azithromycin.
Quinine, for example, is a naturally occurring alkaloid extracted from the cinchona tree bark and already used by the Quechua in Peru .
Artemisinin was first isolated from the plant Artemisia annua but used since ancient times in different Chinese herbal remedies .
Among some of these natural remedies against malaria we have to highlight another Chinese herbal remedy, named Chang Shan, a Chinese herbal remedy extracted from the root of a Hydrangea genus plant (Hortensia), an indigenous plant from Tibet and Nepal that has been in the scope of Harvard University scientists for the mechanism exerted by this herbal remedy to fight malaria.
HOW DOES HALOFUGINONE PREVENTS AUTOIMMUNE DISEASE?
In spite malaria is not an autoimmune disease, the mechanism used by Hydrangea root extract (Chang shan) active constituent halofuginone, was very useful against autoimmune disease Th-17 cells.
Chang shan bioactive constituent halofuginone, a widely studied derivative of febrifugine, showed inhibitory properties against the development of T(H)17-driven autoimmunity in mouse models with multiple sclerosis .
It also showed certain anti-proliferative effects in acute promyelocytic leukaemia in mice models  as well as in the prevention of cryptosporidiosis , a parasitic disease that has severe effects on individuals with compromised immune systems as HIV patients. It also enhanced the radiation sensitivity of human tumour cell lines .
Out of the several active constituents found in Chang shan (Dichroa febrifuga), Febrifugien, has been used for treating malaria-induced fever for about 2,000 years , the other one, Halofuginone, the halogenated derivative of febrifugine, has been tested in clinical trials for potential therapeutic applications in cancer and fibrotic disease .
Recently studies were done on this very last active constituent, Halofuginone, reported the capacity of Halofiginone to inhibit T(H)17 (T Helper 17) cell differentiation . T helper 17 cells (Th17) are a subset of T helper cells producing interleukin 17 (IL-17) discovered in 2007.
They are considered developmentally distinct from Th1 and Th2 cells and excessive amounts of the cell are thought to play a key role in autoimmune disease  such as multiple sclerosis (which was previously thought to be caused by Th1 cells), but also psoriasis, autoimmune uveitis, juvenile diabetes, rheumatoid arthritis, and Crohn's disease .
As you can see a considerable number of benefits are exerted by this natural active constituent found in Hydrangea plant.
HYDRANGENIC ACID FROM HYDRANGEA MACROPHYLLA FOR DIABETES
Another active constituent of Hydrangea macrophylla (Hydrangeae Dulcis Folium), hydrangenic acid, has also been found beneficial for the treatment of diabetes. In studies performed in mice, hydrangenic acid significantly lowered blood glucose, triglyceride, and free fatty acid levels after its administration to rats for 2 weeks at a dose of 200 mg/kg/day .
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