Abstract：
:In healthy normotensive pregnancy, a complex functional network develops between the cardiovascular system, the volume and composition of the extracellular fluid and the renin-angiotensin system (RAS). Cardiac output and heart rate increase, but blood pressure is reduced. The kidneys increase in size and both the glomerular filtration rate and renal blood flow increase early. Renal tubular water and sodium reabsorption is even more enhanced, so that the total body water of mother and foetus rises in the course of pregnancy by 6-8 litres. Plasma osmolality falls by about 10 mosm/kg. yet total body sodium increases by about 1 mol. Understandably, in the face of such complex fluid and pressure adjustments, data on the changes of the RAS in normal pregnancy are often contradictory. However, there is general agreement that the angiotensinogen and inactive renin in plasma are greatly raised. Most groups have also found a considerable increase in active renin. These changes could lead to higher rates of angiotensin I (AI) formation (and hence high circulating angiotensin II levels), with adverse consequences for mother and foetus. The high proportion of inactive renin may reflect a reduction in the rate of activation of prorenin in order to avoid these consequences. This reduction may involve kallikreins which have been listed amongst the putative in vivo activators of prorenin. Excessive AI formation in pregnancy could also be avoided by the production of functionally different renins or angiotensinogens. Such changes will be difficult to detect with assays which require addition of extraneous renin or angiotensinogen.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Daniels CR,Eisen V,Slater JDdoi
10.1007/978-1-4757-0154-8_59subject
Has Abstractpub_date
1986-01-01 00:00:00pages
463-9eissn
0065-2598issn
2214-8019journal_volume
198 Pt Bpub_type
杂志文章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：:Clostridium difficile infection (CDI) remains a considerable challenge to health care systems worldwide. Although CDI represents a significant burden on healthcare systems in Europe, few studies have attempted to estimate the consumption of resources associated with CDI in Europe. The reported extra costs attributable...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-72799-8_1
更新日期：2018-01-01 00:00:00
abstract：:Cellulose is the most abundant carbohydrate on earth and hydrolyzed by cellulases in nature. During catalysis, cellulase transfers protons to and from the oxygen atoms of the glycosidic bond and a water molecule. Since cellulose is an insoluble polymer, some kinds of cellulases, with high activity toward crystalline c...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-2158-0_10
更新日期：2018-01-01 00:00:00
abstract：:Mixed, Augmented and Virtual reality technologies are burgeoning with new applications and use cases appearing rapidly. This chapter provides a brief overview of the fundamental display presentation methods; head-worn, hand-held and projector-based displays. We present a summary of visualisation methods that employ th...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-47483-6_7
更新日期：2020-01-01 00:00:00
abstract：:A20 is most characteristically described in terms relating to inflammation and inflammatory pathologies. The emerging understanding of inflammation in the etiology of diabetes mellitus lays the framework for considering a central role for A20 in this disease process. Diabetes mellitus is considered a major health issu...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4939-0398-6_9
更新日期：2014-01-01 00:00:00
abstract：:Better understanding of central nervous system (CNS) molecules can include the identification of new molecules and their receptor systems. Discovery of novel proteins and elucidation of receptor targets can be accomplished using mass spectrometry (MS). We describe a case study of such a molecule, which our lab has stu...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-06068-2_25
更新日期：2014-01-01 00:00:00
abstract：:Dendritic spines are the postsynaptic receptive regions of most excitatory synapses in the central nervous system. Thus, spines are supposed to act as a fundamental unit for information processing of the brains. Previous studies have demonstrated the roles of drebrin in the formation of dendritic spines and in the rec...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-4-431-56550-5_10
更新日期：2017-01-01 00:00:00
abstract：:Cyclic GMP phosphodiesterase (PDE6) is a key enzyme in vertebrate retinal phototransduction. After GTP/GDP exchange on the a subunit of transducin (Talpha) by illuminated rhodopsin, the GTP-bound form Talpha (GTP/Talpha) interacts with the regulatory subunit (Pgamma) of PDE6 to activate cGMP hydrolytic activity. The r...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-0121-3_9
更新日期：2002-01-01 00:00:00
abstract：:This contribution on the biology and management of bone metastases from prostatic cancer is divided into three parts. The first details a study conducted at Stanford University on the prevention of bone metastases in the lumbar spine, in patients in whom the lumbar spine has been irradiated coincidental to the radiati...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-3398-6_28
更新日期：1992-01-01 00:00:00
abstract：:The Adair four-step kinetic model for the reactions of haemoglobin and oxygen recognizes five haemoglobin species, corresponding to deoxyhaemoglobin and one species for each level of oxygenation of the four haem groups. Thus, an oxygen transport problem involves a system of five simultaneous non-linear partial differe...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-7433-6_22
更新日期：1987-01-01 00:00:00
abstract：:The first identified Gadd45 gene, Gadd45a, encodes a ubiquitously expressed protein that is often induced by DNA damage and other stress signals associated with growth arrest and apoptosis. This protein and the other two members of this small gene family, Gadd45b and Gadd45g, have been implicated in a variety of the r...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4614-8289-5_1
更新日期：2013-01-01 00:00:00
abstract：:The heat shock response (HSR) is characterized by the induction of molecular chaperones following a sudden increase in temperature. In eukaryotes, the HSR comprises the set of genes controlled by the transcription factor Hsf1. The HSR is induced by defects in co-translational protein folding, ribosome biogenesis, orga...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-40204-4_3
更新日期：2020-01-01 00:00:00
abstract：:Central pattern generators located in the brainstem regulate ventilatory behaviors in vertebrates. The development of the isolated brainstem preparation has allowed these neural networks to be characterized in a number of aquatic species. The aim of this study was to explore the architecture of the respiratory rhythm-...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4419-5692-7_1
更新日期：2010-01-01 00:00:00
abstract：:cDNA clones mapping within the first 2601 bases of the 3' end of the TGEV genome were sequenced completely or in part by the method of Maxam and Gilbert and open reading frames were examined. One reading frame yielding a protein having properties of the matrix (M) protein was identified. It is positioned at the immedi...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-1280-2_13
更新日期：1987-01-01 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：:Stem cells provide for all of the tissues in our body during embryogenesis. In adult organisms, they can be found as rare populations of tissue-specific stem cells in quiescent states, although they can still regenerate damaged tissues. Astonishingly, these cells are retained in tissues even post-mortem. There have be...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/5584_2020_492
更新日期：2020-01-01 00:00:00
abstract：:Heterogeneously distributed hypoxic areas are a characteristic property of locally advanced breast cancers. Hypoxia results from an imbalance between the supply and consumption of oxygen (O2). Major pathogenetic mechanisms for the emergence of hypoxia are (i) structural and functional abnormalities in the tumor microv...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/0-387-26206-7_44
更新日期：2005-01-01 00:00:00
abstract：:The prognosis of patients with pulmonary arterial hypertension (PAH) is poor. Available therapies (Ca(++)-channel blockers, epoprostenol, bosentan) have limited efficacy or are expensive and associated with significant complications. PAH is characterized by vasoconstriction, thrombosis in-situ and vascular remodeling....
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-8997-0_21
更新日期：2003-01-01 00:00:00
abstract：:Clinical treatment of diabetic patients by islet transplantation faces various complications. At present, in vitro expansion of islets occurs at the cost of their essential features, which are insulin production and release. However, the recent discovery of blood vessel/beta-cell interactions as an important aspect of...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-90-481-3271-3_10
更新日期：2010-01-01 00:00:00
abstract：:In an attempt to identify the binding sites of myosin fragments to the nitrocellulose film in a flow cell, proteolytic digestion was performed of myosin fragments bound to the substrate. Chymotryptic digestion of papain.Mg-subfragment-1 (S1) showed that a large proportion of S1 were bound near the tail and that the di...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-2872-2_25
更新日期：1993-01-01 00:00:00
abstract：:Crithidia fasciculata DNA topoisomerase (22) has been purified to near homogeneity from trypanosomatid cell extracts. The purified enzyme catalyzes the reversible interconversion of monomeric duplex DNA circles and catenanes in an ATP dependent reaction. Reversible catenane formation is affected by the ionic strength ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-8730-5_42
更新日期：1984-01-01 00:00:00
abstract：:Immune cell activation is a feature of infection with the human immunodeficiency virus (HIV). Here we report our studies on a cohort of over 400 patients with HIV infection studied cross-sectionally and longitudinally to examine the relationship between markers of immune cell activation and disease progression. To exa...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-1995-9_2
更新日期：1995-01-01 00:00:00
abstract：:Macromolecules have been prepared containing native insulin carried by a modified insulin skeleton made by partially thiolating the insulin hexamer and forming intermolecular cross-links through disulphide bridges. Oxidation of partially thiolated insulin (0.5-0.7 SH group/mole), formed by reacting insulin with AHTL, ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3282-4_15
更新日期：1977-01-01 00:00:00
abstract：:MP4CO, developed by Sangart Inc. (San Diego, CA), is a pegylated human hemoglobin-based carbon monoxide (CO) delivery agent and oxygen therapeutic that has shown potential to prevent and reverse red cell sickling. A double blind, comparator controlled, dose-escalation, Phase 1b study was conducted to assess the safety...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1007/978-3-319-38810-6_3
更新日期：2016-01-01 00:00:00
abstract：:A common characteristic among fungal pathogens of plants is that each specializes on a narrow range of specific plants as hosts. One adaptation to a specific host plant is the recognition of the host's chemicals which can be used to trigger genes or developmental pathways needed for pathogenesis. The production of cha...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4757-5235-9_2
更新日期：2002-01-01 00:00:00
abstract：:Angiotensin-converting enzyme (ACE) activity in the intestinal whole homogenate was showed as three peaks on a column of Sephacryl S-300 HR gel filteration. Over 90% of total ACE activity was found in a soluble fraction separated with an ultracentrifuge of the intestinal homogenate, and the ACE activities were detecte...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-9546-5_60
更新日期：1989-01-01 00:00:00
abstract：:Advances in the design of cochlear implants (CIs), as well as improved CI surgical techniques, have led to an increase in the number of patients who retain some residual low-frequency acoustic hearing in the implanted ear. Many of these patients also possess some hearing in the unimplanted ear. Although their low-freq...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4614-1590-9_28
更新日期：2013-01-01 00:00:00
abstract：:The ability to differentiate between well-oxygenated and poorly-oxygenated tumors may play an important role in selecting an optimal therapeutic regime for tumor treatment of the individual patient. We present preliminary results in the development of a dynamic functional MRI method for mapping tissue oxygenation and ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-0075-9_42
更新日期：2003-01-01 00:00:00
abstract：:Long-chain polyunsaturated fatty acids are important components of human milk that seem to influence infant development. After oral administration of U-13C-labeled linoleic acid to a lactating woman the recovery of tracer in milk linoleic acid was 6.4%, whereas tracer recovery in dihomo-gamma-linolenic acid (DGLA) was...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-1371-1_22
更新日期：2001-01-01 00:00:00
abstract：:Water permeability is a key feature of the cell plasma membranes and it has seminal importance for a number of cell functions such as cell volume regulation, cell proliferation, cell migration, and angiogenesis to name a few. The transport of water occurs mainly through plasma membrane water channels , the aquaporins,...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-024-1057-0_18
更新日期：2017-01-01 00:00:00
