Unit 2 - Week 2 Flashcards
______ is characterized by severe anemia in which RBCs are destroyed before being released into circulation.
Thalassemia Major
_______ can detect recognized microdeletions, recognized chromosomal rearrangements, and gene copy numbers; can be useful in diagnosing aneuploidies prenatally
FISH
_______ is less soluble than HbA and tends to form crystals
HbC
_______ are mutations common in hemoglobinopathies in Africa
alpha, beta-thal, C, and S
_______ are mutations common in hemoglobinopathies in East Mediterranean.
beta-thal and S
_______ are mutations common in hemoglobinopathies in Southeast Asia
alpha, beta-thal, and E
_______ are mutations common in hemoglobinopathies in West Pacific
Alpha, beta-thal, and E
_______ are qualitative hemoglobinopathies.
HbS, HbC, and HbE
_______ are quantitative hemoglobinopathies.
Thalassemias
_______ can detect aneuploidies, chromosomal deletions, duplications, or insertions of moderate to large size (>3-5 Mb), rearrangements
Chromosome Analysis
_______ can detect aneuploidies, unbalanced chromosomal rearrangements, chromosome deletions (>200kb), and chromosomal duplications (>400kb)
CMA
_______ can detect mutations in known genes, polymorphic variants, small deletions/insertions (~1-100nt); ideal for looking at sequence of known disease gene
DNA sequencing
_______ cannot detect deletions or rearrangements not tested for, duplications in gene regions, point mutations and small deletions
FISH
_______ cannot detect deletions/duplications below the limit of resolution, nucleotide mutations, balanced chromosomal rearrangement
CMA
_______ cannot detect regions of the gene outside of the region the test was designed for (specificity is frequently less than 100%); large deletions/insertions, rearrangements or most chromosomal abnormalities
DNA sequencing
_______ cannot detect single gene deletions, point mutations, small deletions, duplications, and insertions, methylation defects, and trinucleotide repeat abnormalities
Chromosome Analysis
_______ is 80% less soluble than HbA and forms long polymers that distort the shape of RBCs
HbS
_______ is a fatal condition due to homozygosity for the alpha-thalassemia-___ allele.
Hydrops fetalis; 1
_______ is caused by a decrease in β-globin synthesis due to mutations affecting transcription, RNA processing, or protein stability
Beta+ Thalassemia
_______ is caused by deletion of β-globin gene, nonsense mutation, frameshift mutation, or mutations that result in no RNA synthesis
Beta0 Thalassemia
_______ is caused by large deletions that remove the β-globin gene plus other genes in the β-cluster or LCR
Complex Thalassemia
_______ is characterized by attempted blood production results in thinning bone cortex, enlarged liver, and enlarged spleen.
Thalassemia Major
_______ is characterized by clinically normal symptoms and carrier status for the Beta-thalassemia allele.
Thalassemia Minor
_______ is less important genetically than other drug metabolism genes, because the population distribution of activity is continuous and unimodal
CYP3A
_______ is the mutational mechanism in achondroplasia
Gain of Function
_______ is the mutational mechanism in alpha-thalassemia
Loss of Function
_______ is the mutational mechanism in Charcot-Marie-Tooth Syndrome
Gain of Function
_______ is the mutational mechanism in Duchenne Muscular Dystrophy
Loss of Function
_______ is the mutational mechanism in Hemoglobin Kempsey
Gain of Function
_______ is the mutational mechanism in Hereditary Neuropathy with Predisposition to Pressure Palsy
Loss of Function
_______ is the mutational mechanism in Hereditary Persistence of Fetal Hemoglobin
Heterochromatic Expression
_______ is the mutational mechanism in Hereditary Retinoblastoma
Loss of Function
_______ is the mutational mechanism in Huntington Disease
Novel Property
_______ is the mutational mechanism in Osteogenesis Imperfecta Type 1A.
Loss of Function
_______ is the mutational mechanism in Sickle Cell Disease
Novel Property
_______ is the mutational mechanism in Turner Syndrome
Loss of Function
_______ is the step at which a mutation disrupts production of normal protein in Familial Hypercholesterolemia
Subcellular Localization
_______ is the step at which a mutation disrupts production of normal protein in Hemoglobin Kempsey
Function of correctly folded, assembled, and localized protein in normal amounts
_______ is the step at which a mutation disrupts production of normal protein in hemoglobinopathies
Protein folding
_______ is the step at which a mutation disrupts production of normal protein in Homocystinuria
Cofactor/Prosthetic Group Binding
_______ is the step at which a mutation disrupts production of normal protein in I-cell disease
Post-Translational Modification
_______ is the step at which a mutation disrupts production of normal protein in Osteogenesis Imperfecta
Assembly of monomers into a holomeric protein
_______ is the substrate for CYP2C9
Warfarin
_______ is the substrate for CYP2D6
Tricyclic Antidepressants; Codeine
_______ is the substrate for CYP3A.
Cyclosporin
_______ is the substrate for GP6D
Sulfonamide and Dapsone
_______ is the substrate for NAT
Isoniazid
_______ is the substrate for VKORC1
Warfarin
_______ is the substrate of TMPT
6-mercaptopurine; 6-thioguanine
_______ is used for small genomic deletions/insertions, probe size 100-200kb (much higher resolution than chromosome analysis).
CMA
_______ is used for suspected abnormality of chromosome number or structure.
Chromosome Analysis
_______ is used to detect chromosomal changes smaller than resolution of chromosomal analysis, works best in interphase cells.
FISH
_______ is used to find sequence changes in specific genes (must know or expect a diagnosis with an identified gene whose mutation is detectable and in a region actually sequenced.
DNA sequencing
_______ presents as disease-free since adequate levels of the γ chains are still made due to the disruption of the perinatal globin switch from γ to β
HPFH
_______-deficient individuals are susceptible to hemolytic anemia after drug exposures.
G6PD
6-mercaptopurine is metabolized by _______.
TMPT
6-thioguanine is metabolized by _______.
TMPT
alpha-thalassemia-__ allele is more common in Africa.
2
alpha-thalassemia-__ allele is more common in Southeast Asia.
1
alpha-thalassemia-__ allele is more common in the Mediterranean.
2
An individual who carries two different mutant alleles of the same gene
Compound heterozygote
Codeine is converted to ______ by _____ to be activated.
Morphine; CYP450
Codeine is metabolized by _______
CYP2D6
Cofactor administration may be a useful treatment in _______.
homocystinuria and biotinidase deficiency
Cylcosporin is metabolized by _______.
CYP3A
CYP2D6 is inhibited by _______.
Quinidine, fluoxetine, and paroxetine
CYP3A is induced by _______
Rifampin
CYP3A is inhibited by _______
Grapefruit Juice; Ketoconazole
Dapsone is metabolized by _______.
G6PD
Fluoxetine inhibits _______
CYP2D6
Grapefruit juice inhibits _______.
CYP3A
In emerging treatment models, what is a potential therapy for hemophilia?
Protein Replacement Therapy
In emerging treatment models, what is a potential therapy for Lysosomal storage diseases and alpha-1-antitrypsin?
Enzyme Replacement Therapy
Isoniazid is metabolized by _______.
NAT
Ketoconazole inhibits _______.
CYP3A
Paroxetine inhibits _______
CYP2D6