TY - JOUR
T1 - Measurement of rates of phagocytosis
T2 - the use of cellular monolayers
AU - Michell, R. H.
AU - Pancake, S. J.
AU - Noseworthy, J.
AU - Karnovsky, M. L.
PY - 1969/1/1
Y1 - 1969/1/1
N2 - A method has been developed for measuring the rate of phagocytosis rather than the quantity of particles ingested per cell when the process is virtually complete. The method, which is simpler and more rapid than those described previously, utilizes cellular monolayers, radioactive particles, and short incubation times. Under the conditions described, the rate of uptake of particles by either guinea-pig peritoneal or human blood leukocytes was proportional to both cell concentration and the time of incubation, and was independent of changes in the concentration of particles during the measurement. The particles were retained by the cells for at least 90 min. The most suitable particles so far used have been 32P-labeled Salmonella typhimurium, and acetyl-14C- or methyl-14C-labeled starch particles. The oxidation of 14C-labeled glucose has been studied under the same conditions that were used for the assays of phagocytosis: the greatest increase in formation of 14CO2 from glucose-1-14C occurred a few minutes after the most rapid period of phagocytosis.
AB - A method has been developed for measuring the rate of phagocytosis rather than the quantity of particles ingested per cell when the process is virtually complete. The method, which is simpler and more rapid than those described previously, utilizes cellular monolayers, radioactive particles, and short incubation times. Under the conditions described, the rate of uptake of particles by either guinea-pig peritoneal or human blood leukocytes was proportional to both cell concentration and the time of incubation, and was independent of changes in the concentration of particles during the measurement. The particles were retained by the cells for at least 90 min. The most suitable particles so far used have been 32P-labeled Salmonella typhimurium, and acetyl-14C- or methyl-14C-labeled starch particles. The oxidation of 14C-labeled glucose has been studied under the same conditions that were used for the assays of phagocytosis: the greatest increase in formation of 14CO2 from glucose-1-14C occurred a few minutes after the most rapid period of phagocytosis.
UR - http://www.scopus.com/inward/record.url?scp=0014447293&partnerID=8YFLogxK
U2 - 10.1083/jcb.40.1.216
DO - 10.1083/jcb.40.1.216
M3 - Article
C2 - 4881437
AN - SCOPUS:0014447293
SN - 0021-9525
VL - 40
SP - 216
EP - 224
JO - The Journal of cell biology
JF - The Journal of cell biology
IS - 1
ER -