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Back to
Basics
In
light of a few calls that have come in about
screening and carrier testing, we decided to focus
this issue of "Topic of the Week" on those
frequently asked questions. Perhaps you can share
this information with your family, friends, and
through Facebook! As one network used to
say..."The More You
Know..." |
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Genetics
101: Inheritance |
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An Animated Look at How it
Works |
Tay-Sachs, GM1, Sandhoff,
Canavan and related genetic diseases are known as
Autosomal Recessive Disorders.
Both parents must be a
carrier of a defective gene to be at risk for having a
child affected by the disease. That means with every
pregnancy there is a 25% chance a child will be born
with the disease. It also means that with every
pregnancy there is a 50% chance the child will be born a
healthy carrier.
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PSA for Carrier Screening by NTSAD and Boston
University |
NTSAD
recommends carrier screening ideally before pregnancy as
part of planning for a family. Alongside a doctor and a
genetic
counselor, an individual can explore what carrier
screening is best. It is a simple blood test. Enzyme
testing is the gold standard for Tay-Sachs carrier
screening. Speak with a genetic counselor about
screening for other diseases such as GM1, Sandhoff and
Canavan.
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Did You Know...NTSAD administers and
funds an International Quality
Control
Tay-Sachs
Testing Program? |
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The NTSAD International Tay-Sachs Carrier Testing
Quality Control Program is a voluntary laboratory
proficiency testing program. The program evaluates
laboratory performance of Tay-Sachs enzyme testing in
serum and leukocytes. Serum testing is the standard
method. However, leukocyte testing is recommended when
the person to be screened is pregnant, on birth control
pills or is taking any medications which affect
hormones; all which may interfere with the accuracy of
the serum test.
The program, which was founded and administered by
Dr. Mike Kaback at the University of California-San
Diego for 25 years, is now being run in the lab of Dr.
Mimi Blitzer and Dr. Erin Strovel at the University of
Maryland.
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Frequently Asked
Questions |
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When can I have my
healthy children screened to see if they are
carriers?
The American Academy of Pediatrics (AAP) and the
American College of Medical Genetics do not
support routine carrier testing in minors when
such testing does not provide health benefits in
childhood. The AAP and ACMG advise
against school-based testing or
screening programs, because the school
environment is unlikely to be conducive to
voluntary participation, thoughtful consent,
privacy, confidentiality, or appropriate
counseling about test results. For pregnant adolescents or
for adolescents considering
reproduction, genetic testing and
screening should be offered as clinically
indicated, and
the risks and benefits should be explained clearly. Read
the full statement here.
Where should
I go to be screened?
Your doctor, in conjunction
with a genetic
counselor, should be able to order a blood
test.
I've heard about
JScreen; what is it?
JScreen
is
an online genetics program that offers education
counseling and screening.
Read
more here about the types of screening available and
click
here to read an article about JScreen.
What do I do if my
insurance won't cover the cost of
carrier testing?
Generally most insurances
will cover the cost if you provide them with the
materials that explain why they should cover those
costs. The American College of Obstetrics and Gynecology
(ACOG) has position statements on the importance
of carrier testing and who is at risk. NTSAD can also
provide your insurance company with an informative
letter especially if there is or has been a family
member affected by one the diseases.
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Your
Donation Today is Hope for Tomorrow!
Our many
efforts to fund research, care for families and their
loved ones are made possible thanks to generous
supporters worldwide. Gifts can be made through our
website here. Thank you for supporting NTSAD
and
giving hope to all our
families! |
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__________________________________________________________________________
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National Tay-Sachs
&
Allied Diseases
Association
2001 Beacon Street, #204
Boston, MA 02135
(617) 277-4463
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