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D M Strong

Publications and source records attributed to D M Strong.

119 records · Page 7Linked to original sources
PubMed1973

Specific murine B-cell activation by synthetic single-and double-stranded polynucleotides.

The synthetic single- and double-stranded polynucleotides, poly I, poly C, and poly I.C, were shown to induce thymidine incorporation in six inbred strains of murine spleen cells. This stimulation was shown to be secondary to B-cell activation and not due to contamination of the polynucleotides with bacterial lipopolysaccharide (LPS). The ability of poly I.C to act as a B-cell mitogen, in addition to its behavior as a thymic-independent antigen, suggested that these two phenomena may be related. The similarity of the molecular structure of poly I.C to LPS, a material which also acts as a thymic-independent antigen and a B-cell mitogen, supports the hypothesis that the polyvalent nature of these materials accounts for their functional interaction with murine B cells.

Animals↗
PubMed1973

Lymphocyte activation in subacute sclerosing panencephalitis virus and cytomegalovirus infections. In vitro stimulation in response to viral-infected cell lines.

Efforts to stimulate lymphocytes from measles seropositive and two patients with subacute sclerosing panencephalitis (SSPE) with either commercially available measles virus or virus isolated from a known case of SSPE failed to show any significant data using a microculture assay. Similar results were obtained using lymphocytes from two patients with active cytomegalovirus (CMV) infections and CMV seropositive individuals using CMV suspensions. On the other hand, lymphocytes from the patients with subacute sclerosing panencephalitis exhibited in vitro blastogenesis in culture with SSPE virus-infected HeLa cells. Similarly, lymphocytes from the CMV-infected patients demonstrated blastogenesis when cocultivated with CMV-infected WI-38 cells. This affords a new method for determining the cell-mediated immune capacity of patients with "slow" virus diseases.

Animals↗
PubMedDate not supplied

Cell lines producing human T-cell lymphoma virus show altered HLA expression.

Human T-cell leukaemia/lymphoma virus (HTLV) can be identified in fresh and cultured T-lymphocytes from patients with adult T-cell malignancies. HLA typing of the peripheral blood lymphocytes and cultured cell lines from the patient from which the virus was originally isolated suggested the expression of additional HLA-A and -B locus antigens on the HTLV positive cultured T-cells that were not present on the EBV transformed B-cell line or on the peripheral blood lymphocytes. Peripheral blood lymphocytes (PBLs) and T-cell lines established from patients and cord blood lymphocytes, infected with virus by co-culture with T-cell lines, were typed for HLA antigens with alloantisera and in addition tested for reactivity with a monoclonal antibody (4D12) which recognizes a polymorphic HLA class-I antigen. In all HTLV positive cells, with demonstrable provirus replication, altered HLA alloantigen expression was observed. This may be explained by the observations reported in the accompanying paper which shows homology between the envelope gene region of HTLV and the region of an HLA-B locus gene which codes for the extracellular portion of a class I histocompatibility antigen.

Antigens, Surface↗