(Preview) Most common diseases of 50 plus - Diseases of Central Nervous system - Genetic mutation Causes of Dementia

By Kyle J. Norton Health article writer and researcher; Over 10.000 articles and research papers have been written and published on line, including world wide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the karate GB daily, etc.,.
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         Diseases of Central Nervous system

                           Dementia


About 5-8% of all people over the age of 65 have some form of dementia, and this number doubles every five years above that age. Dementia is the loss of mental ability, severe enough to interfere with people's every life and Alzheimer's disease is the most common type of dementia in aging people.
II. Causes of dementia
I. Genetic Mutation causes of dementia
Genetic mutation is a condition of changes of DNA structure and alteration in the inherited nucleic acid sequence of the genotype(169). There are always a concern of some dementia patients with inherited trails for passing them to their children.

1. Linkage of Dementia with Lewy bodies (DLB) to 2q35-q26 
 Genetic mutation of chromosome 2q35-q36 Lewy bodies (DLB) are multiplex due to its complex mechanism than generally monogenic disorders. Identifying the first familial DLB gene may contribute to an entry point of DLB pathology, according to Belgian family,researchers(170)

2. VCP gene R155H mutation
Some patients in the same family with frontotemporal dementia (FTD) have been diagnosed with high risk of cognitive decline due to the recurrent R155H mutation, according to University of Genova(171).


3. Genetic mutation and Alzheimer's disease
4 genes have been identified to affect development of AD. with the amyloid precursor protein (APP ) gene, presenillin gene (PSEN-1), and presenillin gene (PSEN-1)) affect younger people, and apolipoprotein E (APOE ) iaffects older people(172).

4. Chromosome 3 (FTD-3) caused by a truncating mutation in CHMP2B
Presymptomatic CHMP2B mutation  was found to associated to significantly decreased cerebral blood flow (CBF) affecting brain capillaries(173) and contributing to the early on set of dementia.

5. Mutations in the NOTCH3
Mutations in the NOTCH3 gene are responsible for hereditary stroke disorder, contributed to an adult onset of hereditary ischemic stroke, vascular dementia and psychiatric disorders(174).

6. Etc.
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References
(170) http://www.ncbi.nlm.nih.gov/pubmed/20164589 
(171) http://www.ncbi.nlm.nih.gov/pubmed/18341608
(172) http://www.dementiaguide.com/aboutdementia/typesofdementia/geneticmutations/
(173) http://www.ncbi.nlm.nih.gov/pubmed/22422914
(174) http://www.ncbi.nlm.nih.gov/pubmed/22053260