
Thalassemia is the name of a group of genetic blood disorders. To understand how
thalassemia affects the human body, you must first understand a little
about how blood is made.
Hemoglobin is the oxygen-carrying component of the red blood cells. It
consists of two different proteins, an alpha and a beta. If the body doesn't
produce enough of either of these two proteins, the red blood cells do not
form properly and cannot carry sufficient oxygen. The result is anemia
that begins in early childhood and lasts throughout life.
Since thalassemia is not a single disorder but a group of related
disorders that affect the human body in similar ways, it is important to
understand the differences between the various types of thalassemia.
Alpha Thalassemia
People whose hemoglobin does not produce enough alpha protein have alpha thalassemia. It is
commonly found in Africa, the Middle East, India, Southeast Asia, southern
China, and occasionally the Mediterranean region. There are four types of
alpha thalassemia that range from mild to severe in their effect on the
body.
Beta Thalassemia
People whose hemoglobin does not produce enough beta protein have beta thalassemia. It is
found in people of Mediterranean descent, such as Italians and Greeks, and
is also found in the Arabian Peninsula, Iran, Africa, Southeast Asia and
southern China. There are three types of beta thalassemia that also range
from mild to severe in their effect on the body.
For more
information about Cooley's Anemia Foundation and Thalassemia, please visit
the following web site:
www.cooleysanemia.org
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Our mission:
To eliminate Alzheimer's disease through the
advancement of research; to provide and enhance care and support for all
affected; and to reduce the risk of dementia through the promotion of
brain health.

Incorporated on April 10, 1980:
The
Alzheimer’s Association, the world leader in Alzheimer research and
support, is the first and largest voluntary health organization dedicated
to finding prevention methods, treatments and an eventual cure for
Alzheimer’s.
For 25 years, the donor-supported, not-for-profit
Alzheimer’s Association has provided reliable information and care
consultation; created supportive services for families; increased funding
for dementia research; and influenced public policy changes.
Definition of
Alzheimer's Disease
-
Alzheimer's disease is a
progressive, degenerative disorder that attacks the brain's nerve cells,
or neurons, resulting in loss of memory, thinking and language skills,
and behavioral changes.
-
These neurons, which produce
the brain chemical, or neurotransmitter, acetylcholine, break
connections with other nerve cells and ultimately die. For example,
short-term memory fails when Alzheimer's disease first destroys nerve
cells in the hippocampus, and language skills and judgment decline when
neurons die in the cerebral cortex.
-
Two types of abnormal lesions
clog the brains of individuals with Alzheimer's disease: Beta-amyloid
plaques—sticky clumps of protein fragments and cellular material that
form outside and around neurons; and neurofibrillary tangles—insoluble
twisted fibers composed largely of the protein tau that build up inside
nerve cells. Although these structures are hallmarks of the disease,
scientists are unclear whether they cause it or a byproduct of it.
-
Alzheimer's disease is the
most common cause of dementia, or loss of intellectual function, among
people aged 65 and older.
-
Alzheimer's disease is not a
normal part of aging.
-
Origin of the term
Alzheimer's disease dates back to 1906 when Dr. Alois Alzheimer, a
German physician, presented a case history before a medical meeting of a
51-year-old woman who suffered from a rare brain disorder. A brain
autopsy identified the plaques and tangles that today characterize
Alzheimer's disease.
For more
information about the Alzheimer's Association, please visit the
following web site:
www.alz.org
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