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watch One-Minute World News Last Updated: Monday, 7 March, 2005,
23:19 GMT Study suggests 'type 3 diabetes' Image of insulin The
brain is another source of insulin say the researchers
Scientists say they may have discovered a previously unknown
form of diabetes, after finding the brain produces insulin as
well as the pancreas.  Unlike other types of diabetes, the form
- dubbed type 3 by the US Brown Medical School team - is not
thought to affect blood sugar.  Type 3 affects brain insulin
levels, and appears to be linked with Alzheimer's disease.  The
team's research appears in the Journal of Alzheimer's Disease.
It raises the possibility of a type 3 diabetes Study author Dr
Suzanne de la Monte  Type 1 and type 2 diabetes occur when the
body is unable to produce or use insulin from the pancreas.  The
so-called 'type 3' diabetes refers to lower than normal levels
of newly discovered brain insulin, which appears to be
associated with Alzheimer's disea