To better characterize the increase in lipoprotein lipase (LPL) translation by hypothyroidism, adipocytes were prepared from control and hypothyroid rats. Whereas LPL synthesis was higher in hypothyroid adipocytes, with no change in mRNA levels, there was no increase in hormone-sensitive lipase (HSL) synthesis. To determine whether a transacting translation regulatory factor was present, a cyto...

Cytoplasmic dynein is responsible for intra-cellular transport in eukaryotic cells. Using Fluctuating Finite Element Analysis (FFEA), a novel algorithm that represents proteins as continuum viscoelastic solids subject to thermal noise, we are building computational tools study the mechanics of these molecular machines. Here present methodology obtaining material parameters required represent fl...

Natural products derived from plants provide a rich source for development of new anticancer drugs. Recent studies suggest that modulation of subcellular localization of retinoid X receptor-alpha (RXRalpha) represents a potential approach for inducing cancer cell apoptosis. In this study, we screened a herbal library for inducing translocation of RXRalpha from the nucleus to the cytoplasm. Our ...

OBJECTIVES Diabetes mellitus is associated with biochemical, physiological and pathological alterations in the liver. The aim of this study was to investigate the effects of hydroalcoholic extract of Prangos ferulacea (L.) Lindle (P.f) on changes in rats´ liver structure and serum activities of alanin and aspartate aminotransferases after alloxan injection. MATERIALS AND METHODS In this study...

The crude ethanolic extract from aerial parts of Pothomorphe umbellata L. (Piperaceae) and fractions obtained by partitions sequentially among water-methanol, methylene chloride, and ethyl acetate, as well as the major constituent, 4-nerolidylcatechol, were, respectively, evaluated and evidenced for antioxidant and cytotoxic effects through fluorometric microplate and microculture tetrazolium a...

Background: Mycobacterium tuberculosis is a major cause of mortality and morbidity worldwide. Infection with this bacterium is known to induce the development of autoantibodies of which a few are also known to be diagnostic markers for some other diseases. Antineutrophil Cytoplasmic Antibodies (ANCA's) are among those autoantibodies used in clinical setting for diagnosing systemic vasculitic sy...

The purpose of the experiments reported here is to provide evidence that motoneurons (MTNs) isolated from chick embryo spinal cords go through an active process of cell death when deprived of trophic support in vitro. In order to analyze and characterize this process, MTNs were isolated with a metrizamide gradient technique and cultured in the presence of saturating concentrations of soluble mu...

The needs of the pore ccording to a model that has prevailed since the early 1990s, nuclear import complexes need to dock to the cytoplasmic filaments of the nuclear pore complex (NPC) before they can be translocated to the nucleus. On page 63, Walther et al. A overturn this idea, demonstrating that cytoplasmic filaments have no essential function in the nuclear import of bulk cargos. The resul...

Tritiated thymidine routinely labels onion root cytoplasm during most of the cell cycle. One-third of this label could be cytochemically identified as DNA. The balance of the label was not RNA or a lipid, or attributable to labeled impurities in thymidine-(3)H. In electron microscope radioautographs one-third of the cytoplasmic silver grains was over organelles, presumably mitochondria and plas...

A combined centrifugal, biochemical, and electron microscopic study of the cytoplasmic particulates present in 0.88 M sucrose homogenates of rat liver has been carried out. Size distribution analyses of particles containing pentose nucleic acid (PNA) and exhibiting several types of enzymatic activity revealed three major size groups within the range of particle radius between 10 and 500 mmicro....