Search PubMed⌕ Search

Biomedical subjects

J L Fahey

Publications and source records attributed to J L Fahey.

At least 199 records · Page 11Linked to original sources
PubMed1975

Antigens shared by leukemic blast cell and lymphoblastoid cell lines detected by lymphocyte-dependent antibody.

Lymphocyte-dependent antibodies (LDA's) directed against antigenic determinants present on lymphoblastoid cell lines as well as human leukemia blast cells were demonstrated in heterologous antisera obtained by immunizing rabbits with a membrane fraction from RPMI-4265 (a lymphoblastoid cell line derived from a patient with chronic myelogenous leukemia). LDA was present at high titers against B-lymphoblastoid, myelomonocytic, and stem cell lines. The T-lymphoblastoid cell line MOLT-4, however, did not react. LDA was demonstrated against acute myelogenous as well as lymphoblastic leukemia cells. The reactivity was not directed against phytohemagglutinin-induced blastoid antigens, fetal antigens, or fetal calf serum. Absorptions with lymphoblastoid cell lines removed all LDA reactivity. Similar results were obtained by absorbing the rabbit antiserum with acute lymphoblastic and/or acute myelogeneous leukemia cells. These findings indicate the presence of cross-reactive antigens between lymphoblastoid cell lines and leukemia cells. Furthermore, cross-reactivity between acute lymphoblastic and acute myelogenous leukemia cells was demonstrated.

Absorption↗
PubMed1975

Present status of immunoglobulin research.

Antibodies have been known as important proteins, and, in recent years, understanding of their composition, synthesis, and genetic control has progressed rapidly. These aspects, as well as developments in the areas of structure, including function correlations, membrane immunoglobulin as recognition units, and antibody as regulator molecule, are reviewed. The flow of information development in recent years serves as a basis for projections into coming years, especially in the areas of more aggressive use of antibodies in therapy.

Antibodies↗
PubMed1974

Long-term establishment of a human plasmacyte cell line derived from a patient with IgD multiple myeloma. I. Requirement of a plasmacyte-stimulating factor for the proliferation of myeloma cells in tissue culture.

Cell line LA-49, derived from pleural fluid cells of a patient with IgD multiple myeloma, was established in culture and maintained for more than 1 yr. The D-myeloma protein produced in culture was similar to the serum D-myeloma protein in electrophoretic mobility and in delta- and lambda-chain antigens. The plasma cell tumor culture, LA-49, differed from numerous immunoglobulin-producing B-lymphoblastoid cell lines established in this laboratory in: (a) Morphology (revealing various stages of maturation); (b) type of immunoglobulin produced (IgD vs. IgM, IgG, and/or, rarely, IgA); (c) growth characteristics (requirement of plasmacyte-stimulating factor); and (d) chromosomal features (polyploid vs. pseudodiploid). A growth factor was needed for cell division and maintenance of culture viability. This factor was supplied readily by irradiated feeder layers of normal human fibroblasts or conditional media from fibroblast cultures. Preliminary characterization of this factor revealed it to be a protein with a mol wt of approximately 150,000 daltons.

Animals↗