Linked Life Data

2993460

Source:http://linkedlifedata.com/resource/pubmed/id/2993460

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1985-10-4
pubmed:abstractText
Human peritoneal macrophages (HPM) obtained via laparoscopy were examined for the presence and functional capacity of complement and Fc receptors. Between 5 and 20 ml of peritoneal fluid containing 1-2 X 10(6) macrophages/ml was available for each study. Macrophages made up 80-95% of the cells in the fluid. Fc and C3 receptors on HPM were characterized by rosette formation with, and phagocytosis of, IgG- and C3-coated sheep erythrocytes (E). ElgG were bound by 82% and ingested by 63% of HPM, with 4-15 E ingested/HPM. The HPM formed rosettes with EC3b (56%) and EC3bi (71%) but not EC3d,g or EC3d. Antibodies to complement receptors type 1 (CR1) and type 3 (CR3) inhibited rosette formation with EC3b and EC3bi, respectively, indicating that HPM possessed separate and distinct receptors for the C3b and iC3b ligands. In 60% of the samples studied, HPM demonstrated the ability to ingest both EC3b and EC3bi, as well as ElgG. Because of the heterogeneous nature of the cells obtained in peritoneal fluid, due to their progressive change from monocytelike cells into mature macrophages, HPM were separated by 1 g velocity sedimentation into fractions of increasing maturity. They were then examined for phagocytosis via Fc and complement receptors. Fc receptor mediated phagocytosis occurred throughout the monocyte-to-macrophage maturation sequence, while the ability of HPM to ingest via CR1 and CR3 was maturation dependent, with ingestion via CR3 occurring before CR1, in a manner analogous to in vitro differentiation of monocyte-derived macrophages.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0741-5400
pubmed:author
pubmed:issnType
Print
pubmed:volume
38
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
267-78
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Phagocytosis by receptors for C3b (CR1), iC3b (CR3), and IgG (Fc) on human peritoneal macrophages.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't