Sunday, June 12, 2011

Neurodegenrative Diseases and Stem Cells Therapy: "Parkinson's Disease"


Neurodegeneration is the umbrella term for the progressive loss of structure or function of neurons, including death of neurons. Many neurodegenerative diseases including Parkinson’s, Alzheimer’s, and Huntington’s occur as a result of neurodegenerative processes.

Parkinson's Disease and Stem cells Therapy:


Parkinson's disease is a chronic progressive neurodegenerative condition characterized initially by muscle rigidity, tremors, and the slowing of movement. Over time, patients sustain a loss of mobility and experience difficulties with posture, speech and cognition. It is generally agreed that the decline of a particular brain cell called the dopamine neuron (or dopamine cell) is involved. Current drug therapies are useful in early stages but become less effective as the disease progresses. Dopamine cell transplantation has offered some success in the treatment of Parkinson's but is limited by the small amount of tissue available for transplant.
Recently it has been shown that human embryonic stem cells can be transformed into dopamine cells, when treated with a cocktail of growth factors. Stem cells are undifferentiated cells that possess the ability to divide for indefinite periods in culture, giving rise to a specific specialized cell, such as dopamine. Human embryonic stem cells may one day provide an inexhaustible supply of such cells. However, their usefulness for transplant therapy depends on their exhibiting the normal properties of dopamine cells, most importantly the ability to produce and release dopamine when transplanted into the brain.

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