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Biomedical subjects

L R Adkison

Publications and source records attributed to L R Adkison.

24 records · Page 2Linked to original sources
PubMed1988

Somatic cell mapping and restriction fragment analysis of bovine alpha and beta interferon gene families.

DNA from bovine x hamster hybrid cells preferentially segregating bovine chromosomes has been analyzed by blot hybridization with alpha and beta interferon probes. Retention or loss of bovine interferon genes was compared to segregation of bovine isozyme loci representing previously described syntenic groups. Families of bovine alpha (IFNA) and beta (IFNB) interferon genes were segregated in concordance with each other and with aconitase-1 (ACO1) on bovine syntenic group U18. This syntenic relationship is conserved on human chromosome 9p and on the portion of mouse chromosome 4 proximal to the centromere. In addition, cattle restriction fragment length polymorphisms were identified with both IFNA and IFNB probes. Of particular interest is a polymorphism apparently due to duplication of IFNB genes.

Animals↗
PubMed1988

Somatic cell mapping and restriction fragment analysis of bovine genes for fibronectin and gamma crystallin.

DNAs from cow-hamster and cow-mouse somatic hybrid cells segregating bovine chromosomes have been analyzed by Southern blotting and hybridization with human fibronectin and gamma crystallin probes. Concordancy of retention of these bovine genes was compared to cattle isozyme loci representing previously described syntenic groups. Bovine fibronectin (FNI) and gamma crystallin (CRYG) fragments were concordant with each other and with isocitrate dehydrogenase 1 (IDH1), representing the bovine syntenic group U17. The syntenic relationship of these genes is conserved on human chromosome 2q and also on mouse chromosome 1. In addition, bovine RFLPs were identified with both fibronectin and gamma crystallin probes. These polymorphisms will be used to study recombination between the syntenic loci in pedigreed herds and to mark a segment of the bovine genome that is likely homologous to the Lsh region of mouse chromosome 1, which confers resistance in mice to several intracellular parasites.

Animals↗
PubMed1980

Preparative fractionation of T and B lymphocytes of the Syrian golden hamster with soybean agglutinin.

T and B lymphocytes of the Syrian golden hamster were separated from spleen cell preparations on the basis of their differential agglutinability with the lectin soybean agglutinin. Only B lymphocytes were agglutinated by this lectin, and they could be separated from the unagglutinated T lymphocytes by sedimentation through 50% heat inactivated calf serum at unit gravity. The B lymphocyte aggregates could be dissociated into single cells that were viable and functional after treatment with 0.5 M galactose. The isolated cell fractions were characterized by their blastogenic response to various T cell and B cell specific mitogens and by the presence or absence of cell surface IgG.

Animals↗
PubMedDate not supplied

Muscle morphogenetic protein induces myogenic gene expression in Swiss-3T3 cells.

Myogenesis is thought to be regulated by the MyoD family of regulatory genes, which includes MyoD, myogenin, MRF- 4/myf-6, and myf-5. In situ hybridization studies of vertebrate skeletal muscle development have shown the colocalization of the MyoD family of regulatory genes to specific stages of muscle development. Although many studies have analyzed the regulatory role of these genes during myogenesis, there have been few reports dealing with the activation of these myogenic regulatory genes by exogenous agents. We have previously shown that muscle morphogenetic protein induces myogenesis in clonal populations of avian pluripotent stem cells. The current study was designed to examine the ability of muscle morphogenetic protein to induce myogenesis in a clonal population derived from the established fibroblastic Swiss-3T3 cell line. Swiss-3T3 cells were cloned to generate separate cell populations, tested for pluripotency, propagated through 690 cell doublings, retested for pluripotency, treated with muscle morphogenetic protein, and examined for the induction of gene expression using probes for the transcription products of MyoD and myogenin. Muscle morphogenetic protein induced the expression of mRNAs for MyoD and myogenin, suggesting a role for this compound as an exogenous activator of myogenesis.

3T3 Cells↗