INBORN ERROR OF METABOLISM
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Transcript INBORN ERROR OF METABOLISM
BY: MOHD AMIRUL FAUZI BIN IBRAHIM
Term describes multiple
types of metabolic defects in
body, for example:
1) Maple syrup urine disorder
(MSUD),
2) urea cycle disorders (UCD) ,
3)Mitochondrial disease…..
Rare disease
Related to SDIS.
Defects in gene that produce
enzyme, causing metabolic
activity to be blocked.
Hereditary – carrier gene
‘inborn’ – onset is much prominent
for newborns and infant, but several
cases persist unnoticed until
adulthood
Block in pathway, will
cause toxic accumulation
of substrate,
Intermediate from
alternative pathway
Defects in energy
production
Each metabolic disease is
unique – age of onset,
severity, how it is
inherited
Categories: 1) disorders
resulting toxic
accumulation, 2) disorders
of energy production
Depends on what type of
disease
Generally: vomiting,
lethargy, drowsiness
Developmental delay
Newborn – jaundice,
physical appearance
similar to sepsis
Organomegaly
Myopathy – muscle
weakness
Visual and hearing
problem
Tendency of avoiding
certain types of food.
In United States, 1: 4000
live births
In Malaysia there is no
adequate information to
make estimates.
Number of patients
registered: around 1000
(one hospital)
Public awareness is still
lacking
Misdiagnose from
physician
Parents who are taking
lightly about health
problems
Simple tests – DPNH, ferric chloride
Thin layer chromatography – only 10
amino acids (sample sent abroad)
Reverse phase HPLC and GC-MS, more sensitive in
detecting metabolic changes
Fully automated ion-exchange analyzer – detects more
amino acids, while minimalizing manual work
TANDEM MASS SPECTROMETRY – newest,
ability for screening before birth
Currently, no cure
Early diagnosis help prevent
fatality (TMS – 3 drops of
blood)
Prevention, so that the
condition is stable
Administration of
medication to lower toxic
substance
Patient need to have specific
diet regime, close watch on
metabolic rate.
Regular checkup with IEM
specialist
Unwavering support from
family and friends
• Malaysia Rare Disorder Society http://www.mrds.org.my/
• Malaysia Metabolic Society http://mms.my/index.php
• Institute of Medical Research http://www.imr.gov.my/sdc.html
http://emedicine.medscape.com/article/804757-overview
http://en.wikipedia.org/wiki/Inborn_error_of_metabolism
http://en.wikipedia.org/wiki/Tandem_mass_spectrometry
http://www.moh.gov.my/images/gallery/publications/mh/Malaysia%20Health
%202007-2.pdf
http://www.mrds.org.my/FactSheets/P5_IEM.pdf
Thank you for your
attention