Linked Life Data

6182389

Source:http://linkedlifedata.com/resource/pubmed/id/6182389

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1982-12-21
pubmed:abstractText
Recently several continuous cell lines (among these PLC/PRF/5 cells) producing hepatitis B surface antigen (HBsAg) were established from human hepatocellular carcinomas. The cultured cells provide the first opportunity to study HBsAg synthesis and secretion in vitro. HBsAg, but not HBcAg, was localized by the fluorescent antibody technique in the cytoplasm and on the surface of the cultured cells. Under the electron microscope, th PLC/PRF/5 cells displayed morphologic characteristics of both hepatocytes and hepatocellular carcinoma cells. However, 22-nm. spherical or filamentous HBsAg particles were not seen in the cells, although spherical HBsAg particles were observed in the supernatant culture media. Therefore, the indirect immunoperoxidase technique was used to demonstrate HBsAg at the ultrastructural level. Electron-dense reaction product was detected along the nuclear envelope, on rough-surfaced endoplasmic reticulum, and in cisternae of endoplasmic reticulum. These findings suggest that HBsAg is synthesized on rough-surfaced endoplasmic reticulum and transferred into endoplasmic cisternae for processing and secretion. This mode of HBsAg production is identical with that observed in hepatocytes of patients infected with hepatitis B virus. The absence of detectable intracellular HBsAg particles suggests that the cultured cells secrete the particles very rapidly or that they may have a defect in intracisternal packaging of HBsAg into particles.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0023-6837
pubmed:author
pubmed:issnType
Print
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
465-70
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1982
pubmed:articleTitle
Ultrastructural analysis of hepatitis B surface antigen production in vitro.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.