Kettering University

About: Kettering University is a education organization based out in Flint, Michigan, United States. It is known for research contribution in the topics: RNA & Antigen. The organization has 6842 authors who have published 7689 publications receiving 337503 citations. The organization is also known as: GMI Engineering & Management Institute & General Motors Institute.

Antigenic structure of cell surfaces, an immunoferritin study of the occurrence and topography of h-2, theta, and tl alloantigens on mouse cells.

Abstract: The representation of mouse alloantigens belonging to three systems, H-2, θ and TL, on the surface of cells from thymus, spleen, lymph nodes, and peritoneal cavity, was studied by electron microscopy with ferritin-labeled antibody. As expected from earlier serological data, TL was confined to thymocytes, θ was found on thymocytes and lymphocytes, and H-2 occurred to some extent on all cell types observed. On reticular cells, lymphocytes, plasma cells, and eosinophils, the majority of the cell surface was occupied by H-2; thymocytes had considerably less H-2, and erythrocytes and peritoneal macrophages least of all. In every instance the representation of antigen was discontinuous, the fraction of the cell surface covered being characteristic both of the antigen and of the type of cell. H-2 and θ provide a striking example of this; H-2 is present in far higher amounts on lymphocytes than on thymocytes, whereas the converse is true of θ. Within areas positive for H-2 or θ, protuberances of the surface membrane were often antigen-negative. A better definition of cell surface structure, gained from studies such as this, is necessary for further inquiry into how the cell surface is assembled, and into selective gene action in relation to cellular differentiation.

Interferon gamma-induced transcription of the high-affinity Fc receptor for IgG requires assembly of a complex that includes the 91-kDa subunit of transcription factor ISGF3.

Abstract: A 39-nt DNA sequence, the interferon gamma (IFN-gamma) response region (GRR), is necessary for the IFN-gamma-induced transcription of the high-affinity Fc receptor for IgG (Fc gamma RI) and sufficient for the IFN-gamma-induced transcription of transfected plasmids. By using extracts from IFN-gamma-treated cells, three protein complexes will assemble in vitro on a 9-nt core region in the 3' domain of the GRR. The sequence of this core resembles the IFN-gamma-activated sequence (GAS) described for the GBP gene. Mutations in this GAS core region prevent complex assembly and result in the loss of IFN-gamma induction of reporter constructs containing the mutation. In addition to the GAS core region, a 5' region of the GRR is necessary for optimal IFN-gamma induction and for formation of one of the DNA-protein complexes. By antibody reactivity, we show that a 91-kDa protein, first identified as a component of ISGF3, the IFN-alpha-induced transcription complex, is present in at least two of the DNA-protein complexes. IFN-alpha can induce the formation of the faster-migrating 91-kDa protein-GAS complex but not the slower-migrating complex. Furthermore, IFN-alpha does not result in appreciable transcriptional activation of Fc gamma RI or constructs containing the GRR. Thus, these data demonstrate that the IFN-gamma-activated 91-kDa protein is required for IFN-gamma induction of Fc gamma RI and suggest that an additional complex may be required for optimal expression and specificity.

Abundant primary piRNAs, endo-siRNAs and microRNAs in a Drosophila ovary cell line

Abstract: Piwi proteins, a subclass of Argonaute-family proteins, carry approximately 24-30-nt Piwi-interacting RNAs (piRNAs) that mediate gonadal defense against transposable elements (TEs). We analyzed the Drosophila ovary somatic sheet (OSS) cell line and found that it expresses miRNAs, endogenous small interfering RNAs (endo-siRNAs), and piRNAs in abundance. In contrast to intact gonads, which contain mixtures of germline and somatic cell types that express different Piwi-class proteins, OSS cells are a homogenous somatic cell population that expresses only PIWI and primary piRNAs. Detailed examination of its TE-derived piRNAs and endo-siRNAs revealed aspects of TE defense that do not rely upon ping-pong amplification. In particular, we provide evidence that a subset of piRNA master clusters, including flamenco, are specifically expressed in OSS and ovarian follicle cells. These data indicate that the restriction of certain TEs in somatic gonadal cells is largely mediated by a primary piRNA pathway.

Individual meaning-centered psychotherapy for the treatment of psychological and existential distress: A randomized controlled trial in patients with advanced cancer.

Abstract: Background Patients with advanced cancer have high rates of psychological distress, including depression, anxiety, and spiritual despair. This study examined the effectiveness of individual meaning-centered psychotherapy (IMCP) in comparison with supportive psychotherapy (SP) and enhanced usual care (EUC) in improving spiritual well-being and quality of life and reducing psychological distress in patients with advanced cancer. Methods Patients (n = 321) were randomly assigned to IMCP (n = 109), SP (n = 108), or EUC (n = 104). Assessments were conducted at 4 time points: before intervention, midtreatment (4 weeks), 8 weeks after treatment, and 16 weeks after treatment. Results Significant treatment effects (small to medium in magnitude) were observed for IMCP, in comparison with EUC, for 5 of 7 outcome variables (quality of life, sense of meaning, spiritual well-being, anxiety, and desire for hastened death), with Cohen's d ranging from 0.1 to 0.34; no significant improvement was observed for patients receiving SP (d .05 for all variables). The effect of IMCP was significantly greater than the effect of SP for quality of life and sense of meaning (d = 0.19) but not for the remaining study variables. Conclusions This study provides further support for the efficacy of IMCP as a treatment for psychological and existential/spiritual distress in patients with advanced cancer. Significant treatment effects (small to moderate effect sizes) were observed in comparison with usual care, and somewhat more modest differences in improvement (small effect sizes) were observed in comparison with SP. Thus, the benefits of meaning-centered psychotherapy appear to be unique to the intervention and highlight the importance of addressing existential issues with patients approaching the end of life. Cancer 2018. © 2018 American Cancer Society.