Posted in on 19.04.10
Chinese club moss goes by the name Huperzia serrata, and gives its name to the sesquiterpene alkaloid it contains: huperzine A. This alkaloid has been found to be a superstar in the arena of brain-saving treatments for conditions such as Alzheimer's and age-related senility. Studies in China have found up to 60% improvements in the cognitive functions of such patients, and its potential has been recorded in the Journal of the American Medical Association. This is no mere folk remedy, and is the subject of serious study.
Known as Qian Ceng Ta, Chinese club moss has been a part of traditional Chinese medicine for centuries for the treatment of fever and inflammation, which is not surprising considering that most plants contain antioxidants and anti-inflammatories. However, what is unusual is the fact that it has also been found effective in treating some forms of dementia and depression, and also helps to reduce the incidence of panic attacks in those susceptible to them.
Not only that, but the plant has been found to possess diuretic properties, and a reduction in the swelling associated with water retention could also help to reduce the pain and other effects of swelling and inflammation. However, for now it is its effect on the brain that we are concerned, and research has indicated the likely mechanism by which huperzine A works.
Huperzine is an enzyme inhibitor - specifically inhibiting the enzyme acetylcholinesterase that breaks down acetylcholine, a neurotransmitter involved in the processes of memory, learning and mood. Outside the brain, it is involved in the movement of skeletal muscle tissue as well as in the regulation of cardiac and other smooth muscles such as those of the blood vessels.
When acetylcholinesterase (AChE) attacks acetylcholine (ACh), the latter attaches to a chemical site on the enzyme where it is then destroyed. It is a deliberate function of the body, designed to terminate a synaptic transmission. The purpose of a neurotransmitter is to allow the transmission of an electrical impulse form one nerve cell to another over a gap between them known as a synapse. Once the transmission has been completed, the enzyme can destroy the neurotransmitter, and then another takes its place. In fact one molecule of AChE can destroy around 5,000 molecules of ACh.
However, with age and for other reasons, these neurotransmitters can become depleted so that it becomes increasingly more difficult for brain cells to communicate with each other, and their destruction becomes undesirable. There are drugs available to help prevent this happening (e.g. donepezil, galantamine and tacrine), and so help to improve the memory and mental function of people as they grow older or contract conditions such as Alzheimer's disease.
Huperzine A has been found to take up the site in the acetylcholinesterase molecule that would normally have been used by the acetylcholine, and so save it from destruction. The more Huperzine A molecules present, the more acetylcholine available to pass messages between brain cells, and the stronger the cognitive function of the subject or patient. The pharmaceutical drugs mentioned in the previous paragraph work in exactly the same way.
This is a very specific reaction, one molecule adopting exactly the same space as the other, and has been proved scientifically by comparing the physical shapes of the two molecules. It's just like a jigsaw puzzle, where only one piece can fit into each position. Except here there are two: Huperzine A and acetylcholine both fit into the exact same place in the chemical structure of the acetylcholinesterase molecule.
The biochemistry of the reactions involved is very complex, and shall not be discussed here, but the upshot is that Huperzine A can do exactly the same job as modern drugs to avoid this hydroxylation of the ACh needed for the proper functioning of your brain.
In fact, clinical trials have indicated Huperzine A not only to be comparable in effect to the drugs current used, but also likely safer with respect to the possible side effects. This has still to be confirmed, but the National Institute on Aging is currently carrying out a trial to evaluate this claim in tandem with its effect on Alzheimer's disease. It has also been examined at Harvard University for its effect on epilepsy on patients with whom alternative pharmaceutical treatments have been unsuccessful.
Another suggested benefit of Huperzine A is that it is an NMDA (N-methyl D-aspartate) receptor antagonist that provides protection against damage to the brain by an excess of glutamates, and that it can also help to protect nerve cells from damage. Since NDMA is responsible for the transmission of some types of pain, the antagonist can also act as an analgesic.
There are other benefits that Chinese club moss can provide, and myasthenia gravis is one of them. Although relatively rare, this is a serious condition in which acetylcholine receptors are deactivated on muscle cells. This is achieved through the autoimmune system malfunctioning and creating antibodies against the receptors, and the end result is paralysis and respiratory failure.
Huperzine A reduces the AChE available and so might possibly enable the acetylcholine to work more effectively and delay or even stop the deterioration of muscle function. When people hear of muscle paralysis they frequently forget that breathing requires muscle function, as indeed does your heartbeat. This is currently surmise, and studies are being carried out to determine whether or not this usage of Huperzine A is viable.
Another promising application of Chinese club moss extract is in preventing organophosphate poisoning. These pesticides permanently suppress acetylcholine. This results in seizures due to a lack of interruption of the signals from nerves to muscles. The seizures can result in rapid death from uncontrollable seizures, or from permanent contraction of the diaphragm muscle that allows breathing. Although no human studies have yet been carried out, animals given Huperzine A prior to organophosphate exposure have survived without seizures.
There are no doubts that Chinese club moss and the Huperzine A extracted from it are effective in preventing the suppression of acetylcholine, and in permitting the proper activity of this important neurotransmitter. It is finding an increasing number of potential uses beneficial to the human body, not the least of which would be a partial remedy for some of the effects of dementia and Alzheimer's disease.