SCYM ASCP REVIEW TIPS QUESTIONS AND
ANSWERS SURE A+
✔✔ Adherent Samples - ✔✔Cell lines, some tumors
✔✔Liquid Samples - ✔✔Blood, spleen, bone marrow, fresh marine water
✔✔Solid Tissue Samples - ✔✔Tumors, organs, plants
✔✔Cons of enzymatic disruption methods - ✔✔Can strip surface epitopes
✔✔How to prevent coagulation - ✔✔ACD, EDTA, heparin, or physically disrupt cells
using a method such as vortexing
✔✔How long can whole blood remain at room temperature? - ✔✔24 hours, then
refrigerate for up to 72 hours
✔✔Cells that are too large for flow cytometry - ✔✔Cardiomyocytes and Megakaryocytes
✔✔Factors to consider when fixing to preserve the epitope - ✔✔Fixative type, fixation
time, temperature, fluorochrome compatibility, surface marker compatibility
✔✔Alcohol fixation cannot be used on these fluorochromes - ✔✔PE and GFP
✔✔Aldehydes - ✔✔formaldehyde, increases background, destroys epitopes, 4%
permeabilizes
✔✔Alcohol - ✔✔Ethanol and methanol permeabilizes, alters morphology, nuclear, cell
cycle
✔✔Harsh Detergents - ✔✔Triton X-100, NP-40
ANSWERS SURE A+
✔✔ Adherent Samples - ✔✔Cell lines, some tumors
✔✔Liquid Samples - ✔✔Blood, spleen, bone marrow, fresh marine water
✔✔Solid Tissue Samples - ✔✔Tumors, organs, plants
✔✔Cons of enzymatic disruption methods - ✔✔Can strip surface epitopes
✔✔How to prevent coagulation - ✔✔ACD, EDTA, heparin, or physically disrupt cells
using a method such as vortexing
✔✔How long can whole blood remain at room temperature? - ✔✔24 hours, then
refrigerate for up to 72 hours
✔✔Cells that are too large for flow cytometry - ✔✔Cardiomyocytes and Megakaryocytes
✔✔Factors to consider when fixing to preserve the epitope - ✔✔Fixative type, fixation
time, temperature, fluorochrome compatibility, surface marker compatibility
✔✔Alcohol fixation cannot be used on these fluorochromes - ✔✔PE and GFP
✔✔Aldehydes - ✔✔formaldehyde, increases background, destroys epitopes, 4%
permeabilizes
✔✔Alcohol - ✔✔Ethanol and methanol permeabilizes, alters morphology, nuclear, cell
cycle
✔✔Harsh Detergents - ✔✔Triton X-100, NP-40