Abstract：
:We have studied the structure and function of muscle fibers in which tropomyosin stoichiometry has been reduced by genetic mutation. We used a Drosophila melanogaster flightless mutant Ifm(3)3 and a genetic cross of this mutant with wild type flies to achieve a gradation of tropomyosin gene dosage. We measured the flight ability and wingbeat frequency of the live insects and the ultrastructure and mechanochemistry of isolated single flight muscle fibers. Flight ability is impaired when tropomyosin gene dosage is reduced. Wingbeat frequency also depends upon gene dosage as well as the severity of myofilament lattice disruption and the number of myofilaments in the organized core of the myofibrils. A reduction in number of myofilaments appears to result in a reduction in active muscle stiffness without resulting in an appreciable change in kinetics of force production. Ifm(3)3 is trapped in a relaxed state and cannot generate active force. However, tight-binding rigor cross-bridges are able to form; in the absence of ATP, Ifm(3)3 muscle fibers have high stiffness and force.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Molloy J,Kreuz A,Miller R,Tansey T,Maughan Ddoi
10.1007/978-1-4615-2872-2_15subject
Has Abstractpub_date
1993-01-01 00:00:00pages
165-71; discussion 172eissn
0065-2598issn
2214-8019journal_volume
332pub_type
杂志文章abstract：:Prostate cancer causes significant morbidity in men and metastatic disease is a major cause of cancer related deaths. Prostate metastasis is controlled by various cellular intrinsic and extrinsic factors, which are often under the regulatory control of various metastasis-associated genes. Given the dynamic nature of m...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-95693-0_5
更新日期：2018-01-01 00:00:00
abstract：:Vitamin A is metabolized to several biologically active compounds, the best known of which is retinoic acid. This compound has been shown to inhibit the growth of a variety of tumor cells and to induce a more differentiated phenotype in several tumor types. Vitamin D is metabolized to the active compound 1,25-dihydrox...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4899-0949-7_1
更新日期：1995-01-01 00:00:00
abstract：:The selective translation of maternal mRNAs encoding cell-fate determinants drives the earliest decisions of embryogenesis that establish the vertebrate body plan. This chapter will discuss studies in Xenopus laevis that provide insights into mechanisms underlying this translational control. Xenopus has been a powerfu...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-46095-6_2
更新日期：2017-01-01 00:00:00
abstract：:Aldehyde dehydrogenases are a family of enzymes that oxidize aldehydes to carboxylic acids. These enzymes are important in cellular homeostasis during oxidative stress by the elimination of toxic aldehyde by-products from various cellular processes. In osteosarcoma, aldehyde dehydrogenase 1A1has been described as a ca...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-43085-6_10
更新日期：2020-01-01 00:00:00
abstract：:The melanocortins (MC) are released from neurons and paracrine cells in the CNS where they are involved in important physiological functions, including regulation of body temperature and immune responses. MC bind to melanocortin receptors, a class of cell surface G-protein-coupled receptors. Of the five subtypes of MC...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-6354-3_5
更新日期：2010-01-01 00:00:00
abstract：:PAs are intracellular regulators of growth and anabolic processes. Toxic properties of PAs are conferred according to the increasing number of cationic charges. In uremia, PA accumulation occurs both in and outside the cell. Decreased PA synthesis and blunted PA pathway responses suggest PAs may participate in cellula...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-5445-1_6
更新日期：1987-01-01 00:00:00
abstract：:Oxygen deprivation following cessation of blood flow to vital organs such as brain, heart, and kidney is a ubiquitous human disease, invariably leading to devastating consequences. Studies in experimental models support the contention that membrane permeability is altered, ion fluxes impaired, and energy stores deplet...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-3426-6_28
更新日期：1992-01-01 00:00:00
abstract：:This chapter reviews the present state of knowledge on the activity of enzymes that function with the RNA exosome in the nucleus. In this compartment, the exosome interacts physically and functionally with the exoribonuclease Rrp6 and several cofactors, most prominently Rrp47 and the TRAMP complex. These interactions ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4419-7841-7_8
更新日期：2011-01-01 00:00:00
abstract：:The manzamine alkaloids such as manzamine A, B, and C belongs to a unique family of cyctotoxic beta-carbline linked azacycles, which have been isolated from several marine sponges. Manzamine A has recently been shown to exhibit in vivo antimalarial activity against parasite Plasmodium berghei. Further progress was add...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-0135-0_70
更新日期：2003-01-01 00:00:00
abstract：:The world of noncoding RNAs (ncRNAs) has gained widespread attention in recent years due to their novel and crucial potency of biological regulation. Noncoding RNAs play essential regulatory roles in a broad range of developmental processes and diseases, notably human cancers. Regulatory ncRNAs represent multiple leve...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-10-1498-7_1
更新日期：2016-01-01 00:00:00
abstract：:Psychological therapies in order to provide cognitive enhancement have gained some momentum the last decades. The goal of this case study was to evaluate the effects of a cognitive enhancement training program on daily living activities, cognition, and depression in a demented elderly participant. A 6-month training p...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-57379-3_9
更新日期：2017-01-01 00:00:00
abstract：:A kininogenase resembling glandular kallikrein was partially purified from vascular tissue and characterized. Saline perfused rat tail arteries and veins were homogenized in 0.25 M sucrose containing 10 mM Tris-HCl (pH 7.4). The homogenate was centrifuged at 105,000 X g for 60 min and a vascular kininogenase was purif...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-5143-6_2
更新日期：1986-01-01 00:00:00
abstract：:The cerebellum, and the olivo-cerebellar system in particular, may be the central mechanism of a neural clock that provides a rhythmic neural signal used to time motor and cognitive processes. Several independent lines of evidence support this hypothesis. First, the resting membrane potential of neurons in the inferio...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4939-1782-2_9
更新日期：2014-01-01 00:00:00
abstract：:Human papillomaviruses (HPVs) infect squamous epithelia and can induce hyperproliferative lesions. More than 220 different HPV types have been characterized and classified into five different genera. While mucosal high-risk HPVs have a well-established causal role in anogenital carcinogenesis, the biology of cutaneous...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-46227-7_10
更新日期：2020-01-01 00:00:00
abstract：:The fate and disposition of melatonin released into the circulation is still poorly understood, and almost all current knowledge is derived from measurements made after one single, often very large dose of labeled melatonin. In continuous infusion experiments in freely moving rats, 500 ng melatonin/mL hr had to be inf...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-4709-9_39
更新日期：1999-01-01 00:00:00
abstract：:Purification of angiotensin I-converting enzyme from human lung and characteristics of the enzyme was studied. Experimental pneumonitis was produced in rabbits and the change of the activity of angiotensin I-converting enzyme was studied in purpose to clarify the role of this enzyme in the metabolism of vasoactive pep...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：1979-01-01 00:00:00
abstract：:The configurations of myosin projections in striated muscles from the marine crab, Portunus trituberculatus were described in the relaxed and rigor states at the full overlap length of the thin and thick filaments. The crystallographic period of the thick filament is 101.5 nm (14.5 nm X 7) and the thick filament has f...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-4703-3_21
更新日期：1984-01-01 00:00:00
abstract：:This retrospective research was conducted in the Department of Obstetrics and Gynaecology of the Dr. Cipto Mangunkusumo Hospital, Jakarta, covering the period between 1977 and 1981. The incidence of hydatidiform mole was 1 in 77 pregnancies. The incidence of malignant trophoblastic disease was 1 in 185 pregnancies. Of...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-4811-5_9
更新日期：1984-01-01 00:00:00
abstract：:Review of the literature of the past 40 years on tyrosine and its toxicity shows that no direct link between this aromatic amino acid and carcinogenesis has been well established. Ten years ago, studies of tyrosine toxicity in mice suggested the formation of an epoxide adduction product presumably derived from tyrosin...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4613-1835-4_17
更新日期：1986-01-01 00:00:00
abstract：:There is a considerable body of evidence indicating that oxidative stress is a causal factor both in lipofuscinogenesis as well as in aging. Studies on the effects of pro-oxidants and antioxidants on lipofuscin accumulation in cultured rat cardiac myocytes and human glial cells indicated that pro-oxidants accelerate w...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4899-5339-1_2
更新日期：1989-01-01 00:00:00
abstract：:The effect of compression on the elementary steps of the cross-bridge cycle was investigated with the sinusoidal analysis technique and ATP hydrolysis rate measurement. The lattice spacing of rabbit psoas muscle fibers was osmotically compressed with a macromolecule, dextran T-500 (0-16%). The effects of MgATP, MgADP,...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-2872-2_52
更新日期：1993-01-01 00:00:00
abstract：:Escherichia coli strains of serotype O157:H7 have been incriminated in outbreaks and sporadic cases of food-borne illness, including diarrhea, hemorrhagic colitis, hemolytic uremic syndrome and thrombotic thrombocytopenic purpura. Food-producing animals, particularly cattle, are believed to be reservoirs of the organi...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4899-1828-4_6
更新日期：1997-01-01 00:00:00
abstract：:Urinary tract infection (UTI) is common in children, causes them considerable discomfort, as well as distress to parents and has a tendency to recur. Approximately 20% of those children who experience one infection will have a repeat episode. Since 1975, 11 trials of long-term antibiotics compared with placebo or no t...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4614-4726-9_18
更新日期：2013-01-01 00:00:00
abstract：:The interpretation of cerebral tissue oxygen saturation values (StO2) in clinical settings is currently complicated by the use of different near-infrared spectrophotometry (NIRS) devices producing different StO2 values for the same oxygenation due to differences in the algorithms and technical aspects. The aim was to ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4939-3023-4_52
更新日期：2016-01-01 00:00:00
abstract：:The objective of this work was to establish a novel and robust technology, based on electron paramagnetic resonance (EPR) oximetry, as a practical tool for measurement of tumor oxygen. Previously, we have reported on the development of oxygen-sensing paramagnetic crystals (LiNc-BuO) encapsulated in a biocompatible pol...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-55231-6_41
更新日期：2017-01-01 00:00:00
abstract：:Fluorodeoxyuridylate (FdUMP) and thymidylate synthase (TS) are one of the better understood systems of drug-target interaction in cancer chemotherapy. Isolation and characterization of TS (initially from Lactobacillus casei and later from a variety of other sources), cloning and sequencing of the gene, determination o...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4684-5607-3_1
更新日期：1988-01-01 00:00:00
abstract：:The effects of acute administration of either water or 2% NaCl solution via a stomach tube and injections of diurecits, furosemide (5, 10 mg) and acetazoleamide (5, 20 mg per rat), in adult rats upon urinary kallikrein (Kal), Na and K, were studied. Hyperhydration with water (5% b.w.) produced in 121% increase and 2% ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3267-1_43
更新日期：1976-01-01 00:00:00
abstract：:Molecules encoded by the Major Histocompatibility Complex (MHC) bind self or foreign peptides and display these at the cell surface for recognition by receptors on T lymphocytes (designated T cell receptors-TCR) or on natural killer (NK) cells. These ligand/receptor interactions govern T cell and NK cell development a...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-9367-9_2
更新日期：2019-01-01 00:00:00
abstract：:Autophagy plays a crucial role in maintaining cellular homeostasis, and is closely related to the occurrence of variety of human diseases. It is known that autophagy occurs in response to various environmental stresses such as nutrient deficiency, growth factor deficiency, and hypoxia. Induced autophagy eliminates the...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-15-0602-4_3
更新日期：2019-01-01 00:00:00
abstract：:Sarcoidosis is a systemic granulomatous disease with unknown etiology. Lungs and lymph nodes are commonly affected. Also, cases of pulmonary hypertension (PH) and pulmonary arterial hypertension (PAH) are described. However, the exact prevalence of PAH in patients with sarcoidosis is unclear. A 111 patients with prove...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-94-007-4546-9_38
更新日期：2013-01-01 00:00:00
