Shit I don't know Flashcards
epigenetic changes are good for therapeutic potential because
they are erasable
DMD chromosome
Xp21.2
DMD in the the
exon
alpha thal
deletion in a-gene
turners is a
chrom deletion
hereditary neuropathy with liability is a
deletion of gene
charcot marie tooth is
duplication
AML two mutations
- PML RARa (15/17 translocation)
2. ABL1 BCR (9/22 translocation)
DS infants/children have a 20-100 fold risk for ____ and 500 x risk for _____
ALL or AML
AMKL
SMA chrom
5q 13
digeorge chrom
22q
neurofibromatosis type 1 chrom
17q11.2
achondroplasia chrom
4p16.3
1138 nucleotide
PKD1 chrom
16p13.3
PKD2 chrom
4q22.1
huntingtons chrom
4p16.3
fragile X chrom
X q 27.3
hemophilia A chrom
X q 28
hemohilia gene
F8
retinoblastoma chrom
13
retinoblastoma gene
RB1
5% of the time you get repeat in child with no family history of disease is because
one parent is mosaic in gonadal tissue
usually father
typically ___ allele is referred to as imprinted
repressed
_____ risk for X-linked disease for no family history
2/3
DNA damaging agents
ionizing radiation
Marfan chrom
15
Marfan gene
FBN1
paternal age
achondroplasia
marfan
apert
evolutionary increasing gene copy, if you go too fast, get
macrocephaly and autism
retrotransposition is
intersertional inactivation of genes
ring chrom circularizes and acquires
kinetochore activity for stable transmission
a contiguous gene is
an abnormal phenotype caused by over expression or loss of neighboring genes
examples of contiguous gene
- velocardiofacial syndrom
2. digeorge
velocardiofacial syndrome chrom
del 22q11
velocaardiofacial symptoms
cleft palate
cardiac septal defects
digeorge symptoms
absent thymus/parathyroid
Down syndrome testing
gCG, AFP estriol inhibit measuring nuchal folds in ultrasound
most common medical problem in down syndrome
cardio abnormalities with AV canal
evolution brain increase
increase 1 q21.1 instability
duplications= macrocephayl and autism
deletions= microcephaly, schizophrenia
increase in 1q21.2 increases DUF1220 copy #, which leads to evolutionary advantage
CYP450 gene products are
active in liver and intestinal epithelium
40% of all drugs=
CYP450
___ needed to convert codeine to morphine
CYP26
most CYP’s ____ drugs
inactivate
poor metabolizers expected mutations
- frameshift
- splicing
- nonsense
- missense
ultrafast metabolizer expected mutations
- increased copy number
2. missense
procollagen is composed of
two pro-a1 chains and one pro-a2 chain
osteogenesis imperfecta type one mechanism
- premature termination codons (nonsense and frameshift) in COL1A1
- mRNA unstable
- mRNA degrades
- reduction in normal COL1A1 protein
- autosomal dominant
PMP 22 duplication
charcot marie tooth
PMP 22 deletion
HNPP
Charcot marie tooth mutation
gain of function
Autosomal dominant
CMT symptoms
weak lower extremities
mild sensory loss
muscle atrophy
osteogenesis type 1 vs 2/3
type 1 is loss of function, half normal amount of total collagen, mild
2/3 novel protein function, normal amount of trimers, but they are abnormal. Very severe
decreased amount of protein accounts for
a-thal
monosomy
tumor supressor mutation
increased amount of protein accounts for
trisomy
CMT 1A
inappropriate expression accounts for
HPFH
oncogenes
hexosaminidase pattern Tay sachs
B variant
AB variant
hexosaminidase pattern
sandhog disease
0 variant