What is Type-1 diabetes?
Chronic condition
affecting the ability of the pancreas to produce insulin
Caused by the autoimmune
destruction of insulin-producing beta cells
Characterized by elevated
blood glucose levels
type-1 diabetes is due to a deficiency in the hormone insulin. In
affected individuals, the tendency for the immune system to “attack”
insulin-producing cells is present from birth. When triggered by a
certain event, the body’s immune system attacks the insulin producing
beta cells of the pancreas, leading to their irreparable destruction.
Over a period of time, the destruction depletes so many beta cells that
the body in unable to produce enough insulin to handle the glucose in
the bloodstream.
When there is no insulin in the body, blood glucose levels rise quickly,
and the classic symptoms of diabetes can rapidly develop: extreme
weakness and/or tiredness, extreme thirst as a result of dehydration,
increased urination, abdominal pain, nausea and/or vomiting, blurry
vision, and slow thought processes.
"Triggers" for Type-1
diabetes?
Viral
Environmental Toxins
Inherited Susceptibility
Although we know that
type-1 diabetes is caused by an autoimmune defect resulting in attacks
on the islet cells of the pancreas,
the
exact TRIGGER remains a mystery.
It is believed that both
a genetic predisposition and environmental factors, such as a viral
infection, may be involved.
Viral
- Some research suggests that viral infections may trigger the
expression of the disease in genetically susceptible individuals.
Among the viruses under
scrutiny are
enteric viruses,
which attack the intestinal tract. Coxsackie viruses are a family of
enteric viruses of particular interest. Epidemics of Coxsackie virus, as
well as mumps and congenital rubella, have been associated with
incidence of type-1 diabetes.
Inherited Susceptibility
- Researchers have found
at least 18 genetic locations, labeled IDDM1 - IDDM18, that are related
to type-1 diabetes. The genes in this region affect the immune response.
Most people who develop type-1 diabetes, however, do not have a family
history of the disease. The odds of inheriting the disease are only 10%
if a first-degree relative has diabetes, and even in identical twins,
one twin has only a 33% chance of having type-1 diabetes if the other
has it. Children are more likely to inherit the disease from a father
with type-1 diabetes than from a mother with the disorder.