Abstract
Eosinophils contain four principal cationic proteins, major basic protein (MBP), eosinophil-derived neurotoxin (EDN), eosinophil cationic protein (ECP), and eosinophil peroxidase (EPO). To determine the quantities of these proteins in granulocytes and whether they are specific to eosinophils, their concentrations in lysates of human granulocytes were measured using specific radioimmunoassays. The effect of different methods for eosinophil lysis on the recovery of the proteins was also studied. Maximal recovery occurred at pH 2 for MBP and pH 5.6 for the other granule proteins. The proteins cosedimented with eosinophils and their concentrations (X̄ ± SEM) in ng/106 eosinophils (and in nM/106 eosinophils) were: MBP, 8,982 ± 611 (641.6); EDN, 3,283 ± 116 (178.4); ECP, 5,269 ± 283 (250.9); and EPO, 12,174 ± 859 (171.5). Basophils from a normal person contained (in ng/106 cells) MBP, 2,374; EDN, 214; ECP, 77; and EPO, 17. Highly purified neutrophils contained (in ng/106 cells) MBP, 3 ± 0.5; EDN, 72 ± 9; and ECP, 50 ± 12. Therefore we conclude that these proteins are mainly expressed in eosinophils, but that certain ones are present in basophils and neutrophils.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 611-618 |
| Number of pages | 8 |
| Journal | Journal of Leukocyte Biology |
| Volume | 52 |
| Issue number | 6 |
| State | Published - 1992 |
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Keywords
- basophils
- cationic protein
- eosinophil
- eosinophil peroxidase
- eosinophil-derived neurotoxin
- major basic protein
- neutrophils
ASJC Scopus subject areas
- Cell Biology
Cite this
Eosinophil granule proteins in peripheral blood granulocytes. / Abu-Ghazaleh, R. I.; Dunnette, S. L.; Loegering, D. A.; Checkel, J. L.; Kita, Hirohito; Thomas, L. L.; Gleich, G. J.
In: Journal of Leukocyte Biology, Vol. 52, No. 6, 1992, p. 611-618.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Eosinophil granule proteins in peripheral blood granulocytes
AU - Abu-Ghazaleh, R. I.
AU - Dunnette, S. L.
AU - Loegering, D. A.
AU - Checkel, J. L.
AU - Kita, Hirohito
AU - Thomas, L. L.
AU - Gleich, G. J.
PY - 1992
Y1 - 1992
N2 - Eosinophils contain four principal cationic proteins, major basic protein (MBP), eosinophil-derived neurotoxin (EDN), eosinophil cationic protein (ECP), and eosinophil peroxidase (EPO). To determine the quantities of these proteins in granulocytes and whether they are specific to eosinophils, their concentrations in lysates of human granulocytes were measured using specific radioimmunoassays. The effect of different methods for eosinophil lysis on the recovery of the proteins was also studied. Maximal recovery occurred at pH 2 for MBP and pH 5.6 for the other granule proteins. The proteins cosedimented with eosinophils and their concentrations (X̄ ± SEM) in ng/106 eosinophils (and in nM/106 eosinophils) were: MBP, 8,982 ± 611 (641.6); EDN, 3,283 ± 116 (178.4); ECP, 5,269 ± 283 (250.9); and EPO, 12,174 ± 859 (171.5). Basophils from a normal person contained (in ng/106 cells) MBP, 2,374; EDN, 214; ECP, 77; and EPO, 17. Highly purified neutrophils contained (in ng/106 cells) MBP, 3 ± 0.5; EDN, 72 ± 9; and ECP, 50 ± 12. Therefore we conclude that these proteins are mainly expressed in eosinophils, but that certain ones are present in basophils and neutrophils.
AB - Eosinophils contain four principal cationic proteins, major basic protein (MBP), eosinophil-derived neurotoxin (EDN), eosinophil cationic protein (ECP), and eosinophil peroxidase (EPO). To determine the quantities of these proteins in granulocytes and whether they are specific to eosinophils, their concentrations in lysates of human granulocytes were measured using specific radioimmunoassays. The effect of different methods for eosinophil lysis on the recovery of the proteins was also studied. Maximal recovery occurred at pH 2 for MBP and pH 5.6 for the other granule proteins. The proteins cosedimented with eosinophils and their concentrations (X̄ ± SEM) in ng/106 eosinophils (and in nM/106 eosinophils) were: MBP, 8,982 ± 611 (641.6); EDN, 3,283 ± 116 (178.4); ECP, 5,269 ± 283 (250.9); and EPO, 12,174 ± 859 (171.5). Basophils from a normal person contained (in ng/106 cells) MBP, 2,374; EDN, 214; ECP, 77; and EPO, 17. Highly purified neutrophils contained (in ng/106 cells) MBP, 3 ± 0.5; EDN, 72 ± 9; and ECP, 50 ± 12. Therefore we conclude that these proteins are mainly expressed in eosinophils, but that certain ones are present in basophils and neutrophils.
KW - basophils
KW - cationic protein
KW - eosinophil
KW - eosinophil peroxidase
KW - eosinophil-derived neurotoxin
KW - major basic protein
KW - neutrophils
UR - http://www.scopus.com/inward/record.url?scp=0027093234&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027093234&partnerID=8YFLogxK
M3 - Article
C2 - 1464733
AN - SCOPUS:0027093234
VL - 52
SP - 611
EP - 618
JO - Journal of Leukocyte Biology
JF - Journal of Leukocyte Biology
SN - 0741-5400
IS - 6
ER -