11 үр дүн
In a two-stage skin tumorigenesis protocol [7,12-dimethylbenz[a]anthracene (DMBA) initiation followed by twice weekly 12-O-tetradecanoylphorbol-13-acetate (TPA) promotion], SENCAR mice developed an average of approximately 8.5 papillomas per animal. Hyperthermia treatments of the initiated skin (44
Large granular lymphocytes (LGL) with a T or natural killer (NK) lymphoblast morphology and indiscriminate (non-major histocompatibility complex-linked) cytotoxicity for a variety of target cells can be derived in culture from the tissues of animals infected with either alcelaphine herpesvirus-1
Rift Valley fever (RVF) virus is a cause of significant human and animal disease in many parts of Africa. In some cases, it causes a hemorrhagic fever, which is frequently fatal. Prior studies have shown that RVF virus productively infects peritoneal macrophages from susceptible rat strains. The
During sepsis or after injection of endotoxin into rats, there is a large increase in muscle protein breakdown and prostaglandin E2 (PEG2) production. Prior studies showed that partially purified interleukin 1 (IL-1) from human monocytes can stimulate these processes when added to isolated rat
Certain viruses have evolved mechanisms to counteract innate immunity, a host response in which nuclear factor kappaB (NF-kappaB) transcription factors play a central role. African swine fever virus encodes a protein of 28.2 kDa containing ankyrin repeats similar to those of cellular IkappaB
Am important aspect of human immunodeficiency virus (HIV-1) infection is the regulation of its expression by nuclear factor kappa B (NF-kappa B) by redox-controlled signal transduction pathways. In this study, we demonstrate that selenium supplementation can effectively increase glutathione
We report measurements of ion transport across the gastric caecum of larvae of Aedes aegypti, a vector of yellow fever that inhabits a variety of aquatic habitats ranging from freshwater to brackish water. We provide the first measurements of the effect of 5-hydroxytryptamine (5-HT) on
Phorbol esters activate protein kinase C and modulate a variety of downstream cell signaling pathways. 12-O-tetradecanoylphorbol-13-acetate (TPA) is a phorbol ester that induces differentiation or apoptosis in a variety of cell lines at low concentrations. A phase I dose escalation trial of TPA was
Spectrin-like proteins are found in a wide variety of non-erythroid cells where they generally occur in the cell cortex near the plasma membrane. To determine the intracellular distribution of alpha-spectrin (alpha-fodrin) in lymphocytes, we have developed an immunoperoxidase method to localize this
Tissue cultures of freshly isolated murine and human keratinocytes as well as transformed keratinocyte cell lines secret a cytokine, epidermal cell derived thymocyte activating factor (ETAF), which augments in vitro lymphoproliferative responses. Keratinocytes produce increased levels of ETAF
Our laboratory has reported on a biphasic pattern of nuclear factor kappaB (NF-kappaB) activation in cultured human umbilical vein endothelial cells during infection with Rickettsia rickettsii, an obligate, intracellular bacterium, and the etiologic agent of Rocky Mountain spotted fever.