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Old_Geezer stated, “I'd rather vivisection didn't exist, but when researchers who are clearly more knowledgeable of the issue than I am tell us that for some things there is no substitute then one feels it isn't easy to condemn it”
Suitable animal models (like primates for Alzheimer’s research) are invaluable.
An example of the biochemical complexity involved is the research in finding a treatment/cure for Alzheimer’s disease(AD).
The physiological changes of AD are the deposition in the brain of extracellular spherical amyloid (Aβ) plaques & surrounded by intracellular tau tangles. Aβ plaques & tau tangles are notably found in the cerebral cortex, hippocampus, limbic system & subcortical nuclei of the brains of AD sufferers.
Recently monoclonal antibodies for amyloid plaques or vaccine have been found to clear away amyloid plaques by a third within 6 months in the brains of Alzheimer’s Disease (AD) sufferers in clinical trials.
Such treatment can delay onset of AD by 5 years. Neuroimaging techniques involving positron emission tomography (PET), single photon emission computed tomography (SPECT), structural MRI gamma scanning can detect AD process around 3 years before the clinical onset of cognitive impairment.
Other possible treatment include:
:: Inhibiting Aβ release from parent protein by using compounds like protease inhibitors, estrogen, nerve growth factors, cholesterol lowering drugs, etc.
:: Inhibiting Aβ aggregation by using vaccination, decoy peptides, etc. Decoy peptides (5 to 9 AA chain) had been synthesised that can bind with Aβ plaques, changing β-amyloid into a non-toxic form.
:: Inhibiting the effects of the AD by, for example, using antioxidants and copper/zinc chelators to reduce oxidative stress, anti-inflammatory drug to reduce brain inflammation, and NGF to maintain neurons.
:: Replacing deficient enzymes and other proteins by, for example, using gene therapy or by direct administration.