Shared Flashcard Set

Details

Clinical Correlations
Diseases (lots and lots of diseases)
44
Medical
Professional
07/26/2009

Additional Medical Flashcards

 


 

Cards

Term
Sickle Cell Anemia
Definition
Glutamic acid in Hb is replaced with a valine
Term
Sideroblastic anemia
Definition
RBC are unable to uptake iron into their Heme group.
Term
melanin granule
Definition
decreased amount in the sustantia nigra of the parkison's brain
Term
Pompe's disease
Definition
Lysosome are missing glycogen enzyme, alpha glycosidase. Build up of glycogen in lysosomes causes other lysosomal enzyme to leak and damage their surrounding
Term
Tay-Sach's disease
Definition
Lysosomal disease where the patient lack hexosaminidase A and can't build up a certain fatty acid in the brain. Leads to retardation
Term
Gout
Definition
caused by hyperurecemia, which leads to a build up of crystals in lysosomes. Lysosomes eventually lyse and release their enzymes on joints.
Term
Zellweger's syndrome
Definition
peroxisomes cannot oxidize long fatty acids
Term
colchicine
Definition
prevents microtubule assembly by binding to tubulin heterodimers
Term
vinblastine and vincristine
Definition
aggregates tubulin and prevent assembly of microtubules
Term
nocodazole
Definition
stimulates depolymerization at the minus end of microtubules
Term
taxol
Definition
prevents depolymerization of microtubules
Term
zidovudine
Definition
(AZT) a retroviral RNA inhibitor. Has a minimal effect on eukaryotic nuclear polymerase but it inhibits mitochondrial polymerase (affects TCA cycle).
Term
acyclovor
Definition
affects Herpes DNA polymerase
Term
5'-fluorouracil (5'-FU)
Definition
reduces synthesis of  dTMP in DNA strand, affects DNA and RNA polymerase
Term
Bleomycin and etoposide
Definition
inhibit topoisomerase II. Prevent unwinding of DNA for replication
Term
doxorubicin and dactinomycin
Definition
intercalate into the DNA strand and inhibit DNA and RNA polymerase
Term
cyclophosphamide and nitrosureas
Definition
alkylating agents lead to copying errors if DNA strand
Term
ß thalassemia
Definition
splice site mutation, affect mRNA size
Term
systemic lupus erythmatoseus
Definition
autoimmune disease in which patient produces antibodies to snRNPs (affects spliceosome formation)
Term
actinomycin D
Definition
inhibits DNA unwinding
Term
Ethidium Bromide
Definition
intercalate into DNA and prevents unwinding
Term
rifampicin
Definition
blocks beta unit of prokaryotic RNA polymerase, good antibacterial
Term
α aminicin
Definition
found in poisonous mushrooms. A toxin for eukaryotic RNA polymerase II (no mRNA, no proteins, you die)
Term
pyruvate kinase deficiency
Definition
especially dangerous for cell that undergo anaerobic metabolism, like RBC. This prevents any net production of ATP from glycolysis. So RBC Na+/K+ ATPase activity is inhibited and cells lyse
Term
Hypoxia Induced Factor-1
Definition
HIF-1 upregulated in tumors where cells don't get enough oxygen. Leads to the upregulation of glycolysis and an increase in the expression of GLUT 1 and GLUT 3 on cell surfaces
Term
arsenate ions
Definition
the less severe form of arsenic poisoning. Arsenate ions competitively inhibit the binding sites 3 phosphate glycerate dehydrogenase
Term
Fluoride
Definition
inhibits enolase, the step 9 enzyme that takes 2phosphoglycerate to phosphoenolpyruvate
Term
iodoacetate
Definition

in glycolysis it replaces the inorganic phosphate in the 3 phosphate glyceraldehyde dehydrogense reaction


Term
arsenite
Definition
The more toxic of the arsenic poisoning, these ions bind covalently (permanently) with the thiol group of complex II's coenzyme, lipoic acid, of the PDH complex.
Term
pyruvate dehydrogenase deficiency
Definition

complex I of the PDH complex is inhibited. So pyruvate does not get turned into AcCoA, so the TCA cycle can't happen. This means a dramatic decrease in ATP production.

 

leads to the accumulation of pyruvate, lactate and alanine

Term
amalorite
Definition
inhibit the eNaC transporter in epithelial cell.This means a reduced intracellular [Na+], which will affect the Na+/K+ ATPase pumps, which pumps out 3 Na+ for every 2 K+ it pumps in. 
Term
Fumarase deficiency
Definition

Malate is not formed, so reduces levels of oxoloacetate.

 

High levels of fumarate in urine

Term
fluoroacetate
Definition
inhibits the aconitase enzyme by making the inhibitor fluorocitrate
Term
vitamin deficiencies
Definition
affect the precursors for the coenzymes of the PDH complex. Niacin (NAD+, soluble cofactor), riboFlavin (FAD+, complex III's coenzyme), Thymine (Thiamine Pyrophosphate, complex I's coenzyme), pantothenic acid (CoA, soluble cofactor)
Term
thermogenin
Definition
brown fat in babies. A ETS uncoupler
Term
Valinomycin
Definition
inserts K+ channels in the mitochondrial membrane. K+ move downhill of gradient from the inner membrane and destroy the H+ gradient needed for ATP synthesis
Term
Ferritin
Definition
in high iron concentration it binds free iron in blood and shuttles it out
Term
transferrin
Definition
when iron levels are low, rate of transferrin production increases so that cells can take up more iron
Term
Oligomycin
Definition
inhibits the ATP synthase activity of the mitochondria by blocking H+ flow
Term
2,4-dinitrophenol and pentacholorphenol (wood preservative)
Definition
makes the mitochondrial membrane permeable to H+ allowing the proton to flow down their gradient without making ATP. Energy is released in the form of heat
Term
diphtherin toxin
Definition
it interferes with the elongation step in RNA translation by catalyzing GDP rybosylation in the eEF2-GDP complex
Term
aminoglycosydes (steptomycin and neomycin)
Definition
affect the 30s subunit of prokaryotes
Term
Tetracycline
Definition
inhibits both prokaryotic 30S and eukaryotic 40S subunit
Term
chloramphenicol
Definition
inhibits the prokaryotic 50S subunit by blocking the peptidyltransferase needed in elongation
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