General transcription factor IIH (TFIIH) is a complex RNA polymerase II basal transcription factor comprising 10 different polypeptides that display activities involved in transcription and DNA repair processes. Although biochemical studies have uncovered TFIIH importance, little is known about how the mRNAs that code for TFIIH subunits are regulated. Here it is shown that mRNAs encoding seven ...

Glial cell line-derived neurotrophic factor (GDNF) promotes the survival or differentiation of several types of neurons. This study examines GDNF-induced signal transduction and biological effects in cultured striatal neurons. Results show that GDNF addition to striatal cultures transiently increased the protein levels of phosphorylated p42/p44, but did not change the levels of phosphorylated A...

It has been shown that 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors have pleiotropic effects and that human serum paraoxonase (PON1) inhibits the oxidative modification of low-density lipoprotein. We investigated the effects of pitavastatin on PON1 gene promoter activity and PON1 protein expression through the activation of mitogen-activated protein (MAP) kinase signaling cascades...

Recent studies show that adrenergic agonists and inflammatory cytokines can stimulate skeletal muscle glucose uptake, but it is unclear if glucose oxidation is similarly increased. Thus, the objective of this study was to determine the effects of ractopamine HCl (β1 agonist), zilpaterol HCl (β2 agonist), TNFα, and IL-6 on glucose uptake and oxidation rates in unstimulated and insulin-stimulated...

Puri, Rajinder N., Ya-Ping Fan, and Satish Rattan. Role of pp60c-src and p44/42 MAPK in ANG II-induced contraction of rat tonic gastrointestinal smooth muscles. Am J Physiol Gastrointest Liver Physiol 283: G390–G399, 2002; 10.1152/ajpgi.00025.2002.—We examined the role of mitogen-activated protein kinase (p44/42 MAPK) in ANG II-induced contraction of lower esophageal sphincter (LES) and interna...

BACKGROUND/AIMS Severe acute lung injury (ALI) often develops into acute respiratory distress syndrome (ARDS). Previous studies have shown that platelet-derived growth factor (PDGF) and transforming growth factor β1 (TGFβ1) participate in the pathogenesis of ARDS by stimulation of fibroblast proliferation, leading to the development of pulmonary fibrosis. However, the exact pathways downstream ...

Anaplasma phagocytophilum is the causative agent of an emerging tick-borne zoonosis in the United States and Europe. The organism causes a febrile illness accompanied by other nonspecific symptoms and can be fatal, especially if treatment is delayed. Persistence of A. phagocytophilum within mammalian reservoir hosts is important for ensuring continued disease transmission. In the related organi...

Transactivation of EGF receptors by G protein-coupled receptors is a well-known phenomenon. This process involves the ectodomain shedding of growth factors in the EGF family by matrix metalloproteinases. However, many of these studies employ transformed and/or cultured cells that overexpress labeled growth factors. In addition, few studies have shown that EGF itself is the growth factor that is...

In simian sarcoma virus (SSV)-transformed cells (SSV-NRK, SSV-NIH 3T3, and SSV-NPl cells), the vsis gene product was synthesized as a 36-kDa glycopolypeptide with one endoglycosidase (Endo) H-sensitive oligosaccharide chain and formed a dimer (~72) with a half-time of <5 min. p72 was proteolytically processed to generate sequentially ~68 and ~58 in the endoplasmic reticulum/Golgi complex, p44 i...

Anaplasma phagocytophilum is an obligately intracellular tick-transmitted bacterial pathogen of humans and other animals. During the course of infection, A. phagocytophilum utilizes gene conversion to shuffle ∼100 functional pseudogenes into a single expression cassette of the msp2(p44) gene, which codes for the major surface antigen and major surface protein 2 (MSP2). The role and extent of ms...