Abstract：
:Progress in studies on the scrapie agent has been hampered by the slow and tedious endpoint titration assays in rodents. A new assay based on incubation period measurements has been developed. The incubation period is defined as the time interval from inoculation to the onset of clinically detectable neurological illness or as the interval from inoculation to death. Both of these intervals or incubation periods are inversely proportional to the size of the dose injected intracerebrally into random bred weanling syrian hamsters. The incubation period was found to be a linear function of the logarithm of the inoculum size over a wide range of dosages (10(2) - 10(8) ID50 units). From these studies an equation relating the titer of the inoculum to the dilution of the sample and the length of the incubation period has been developed facilitating the use of a computerized record system. Validation of the assay was provided by comparing samples where the agent was measured both by endpoint titration and incubation period methods. Agreement between the 2 methods was generally within +/- 0.5 log10 ID50 units. In addition, no differences between the molecular properties of the agents from hamster and murine sources have been detected using primarily the incubation period method with the former and endpoint titration with the latter. The advantages of the incubation period assay are considerable with respect to time and economy.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Prusiner SB,Cochran SP,Downey DE,Groth DFdoi
10.1007/978-1-4757-0495-2_35subject
Has Abstractpub_date
1981-01-01 00:00:00pages
385-99eissn
0065-2598issn
2214-8019journal_volume
134pub_type
杂志文章abstract：:The clinical aspects of gout were described based on the 4,112 patients observed in the same clinic. In this paper mainly, 2,455 cases seen between 1958 and 1973 were described based on a pretrospective computer assisted analysis. The age distribution of the patient had its peak at 50 years of age and the average age ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-9140-5_8
更新日期：1980-01-01 00:00:00
abstract：:Cerebral infarction (CI) caused by middle cerebral artery occlusion exhibits a very high mortality rate. To reduce this rate, a decompressive hemicraniectomy (DHC) is performed clinically based on several randomized trials. In ischemic stroke, a state of malnutrition leads to poor outcomes. However, little evidence is...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-91287-5_6
更新日期：2018-01-01 00:00:00
abstract：:Recent studies suggested that colorectal cancer influences the types and quantity of nucleic acids - especially microRNAs - detected in the bloodstream. Concentration of circulating (cell-free) microRNAs, and possibly of other non-coding RNAs, could therefore serve as valuable colorectal cancer biomarker and could del...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-42059-2_9
更新日期：2016-01-01 00:00:00
abstract：:DES is metabolized to a number of compounds through a minimum of three main metabolic routes. These routes result in some inactivity of DES as an estrogen, but the majority appear to produce estrogenic by-products, which in some cases produce divergent in vivo and in vitro hormone activities. Therefore, if DES undergo...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-7192-6_3
更新日期：1981-01-01 00:00:00
abstract：:The characteristic functions of relaxin are associated with female reproductive tract physiology. These include the regulation of biochemical processes involved in remodeling the extracellular matrix of the cervix and vagina during pregnancy and rupture of the fetal membranes at term. Such modifications enable the you...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-74672-2_4
更新日期：2007-01-01 00:00:00
abstract：:Acid proteinase of granulomatous tissues in rats with carrageenin-induced inflammation released two types of kinin from T-kininogen. The kinin was identified as Ile-Ser-bradykinin (T-kinin) and a novel kinin, Met-Ile-Ser-bradykinin (Met-T-kinin), from determination of its amino acid composition and its immunoreactivit...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-9546-5_17
更新日期：1989-01-01 00:00:00
abstract：:An allosteric mechanism refers to the biological regulation process wherein macromolecules propagate the effect of ligand binding at one site to a spatially distant orthosteric locus, thus affecting activity. The theory has remained a trending topic in biology research for over 50 years, since the understanding of all...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-8719-7_4
更新日期：2019-01-01 00:00:00
abstract：:We focus on dynamical descriptions of short-term synaptic plasticity. Instead of focusing on the molecular machinery that has been reviewed recently by several authors, we concentrate on the dynamics and functional significance of synaptic plasticity, and review some mathematical models that reproduce different proper...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-62817-2_3
更新日期：2017-01-01 00:00:00
abstract：:213 paired tcpO2/paO2-data and 186 paired tcSO2/SaO2-data measured in 25 newborns (10 term, 15 prematures) were compared. The correlation coefficient for tcpO2/paO2 was 0.796, for tcSO2/SaO2 0.944. Sensitivity for discriminating between normo- and hypoxemia (paO2 less than 50 torr) was 82% for the tcpO2- and 88% for t...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4613-1927-6_30
更新日期：1987-01-01 00:00:00
abstract：:The subunit structure of the B-cell antigen receptor (BCR) and its associated compartmentalization of function confer enormous flexibility for generating signals and directing these toward specific and divergent cell fate decisions. Like all the multichain immune recognition receptors discussed in this volume, assembl...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-09789-3_2
更新日期：2008-01-01 00:00:00
abstract：:MELAS (mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes) is a mitochondrial disease caused by one or more mutations of tRNA(Leu(UUR)). These mutations reduce both the aminoacylation of tRNA(Leu(UUR)) and a posttranslational modification in the wobble position of tRNA(Leu(UUR)). Both ch...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4614-6093-0_16
更新日期：2013-01-01 00:00:00
abstract：:This work proposes to use a static Bayesian network as a tool to support medical decision in the on-line detection of Premature Ventricular Contraction beats (PVC) in electrocardiogram (ECG) records, which is a well known cardiac arrhythmia available for study in standard ECG databases. The main motivation to use Baye...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-79100-5_12
更新日期：2010-01-01 00:00:00
abstract：:The synapse between the inner hair cells (IHCs) and the spiral ganglion neurons (SGNs) in mammalian cochleae is characterized as having presynaptic ribbons and therefore is called ribbon synapse. The special molecular organization is reviewed in this chapter in association with the functional feature of this synapse i...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-6123-4_3
更新日期：2019-01-01 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：:Long before the RNA degrading exosome was first described in the yeast Saccharomyces cerevisiae, the use of autoantibodies found in the sera of certain autoimmune patients allowed the identification of a complex of polypeptides which later appeared to be the human exosome. Today, the most extensively documented associ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：
更新日期：2010-01-01 00:00:00
abstract：:We have examined the question of how hormones regulate the biosynthesis of gonadotropins. In particular we have studied the effects of gonadal sex steroid hormones on the regulation of LH subunit gene expression to determine whether they may occur at the pre-translational level. Success in the molecular cloning of cDN...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4684-5209-9_11
更新日期：1986-01-01 00:00:00
abstract：:There is no reason to believe that a single lumenal or tissue factor will hold the key to understanding the of dietary fiber's effect on reducing the risk of colon cancer. In fact, the data suggest that multiple, interacting factors will be revealed. After years of research, it appears that the bile acid hypothesis is...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-5967-2_26
更新日期：1997-01-01 00:00:00
abstract：:SFHS modified by covalent incorporation of pyridoxal phosphate using NaCNBH3 as reducing agent had P50 values of 21-25mm Hg, and was insensitive to the addition of BPG. The Hill slope of the modified product was 2.34, demonstrating good functional cooperativity of the subunits. Oxygen carrying capacity, calculated as ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-5643-1_41
更新日期：1989-01-01 00:00:00
abstract：:Systematic studies on the oxygenation status of solid tumors have shown that the development of hypoxic/anoxic tissue subvolumes is a pathophysiological trait in a wide range of human malignancies. As a result of this characteristic property, adenosine (ADO) accumulation (range: 50-100 μM) occurs caused by intra- and ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4939-3023-4_22
更新日期：2016-01-01 00:00:00
abstract：:Medical imaging now enables measurement of the lung in vivo at controlled volumes, prompting the development of increasingly sophisticated models of the geometry of the lung, from the largest airways and vessels to the alveolar tissue and capillary bed. We have developed methods for deriving subject-specific models of...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-73693-8_33
更新日期：2008-01-01 00:00:00
abstract：:Opioid receptors which are involved in cough generation are abundantly expressed in the brainstem. Codeine is a potent μ-opioid receptor agonist. In the present study we examined the effects of naloxone, a μ-opioid receptor antagonist, on mechanically-induced tracheobronchial cough and on the cough suppressing effect ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-94-007-4549-0_9
更新日期：2013-01-01 00:00:00
abstract：:Tumor growth is a highly complex, multistep process that involves tumor cell detachment, migration, invasion and metastasis accompanied by angiogenesis and extracellular matrix turn-over. Each of the steps is influenced by tumor cell interaction and interaction of the tumor cell with its microenvironment that consists...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-7913-1_9
更新日期：2010-01-01 00:00:00
abstract：:Abstract Of diverse growth factors that contribute to normal lung development, vascular endothelial growth factor (VEGF) plays an especially prominent role in the normal growth and development of the pulmonary circulation in the fetus and newborn. Strong experimental and clinical data support the role of impaired VEGF...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-60761-500-2_21
更新日期：2010-01-01 00:00:00
abstract：:Stem cells serve as persistent reservoirs for replenishment of rapidly renewing tissues, frequently also ensuring that the correct tissue morphology is maintained. This process is inherently stochastic due to the small number and stochastic division patterns within the stem cell compartments, as well as the essentiall...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4419-7210-1_11
更新日期：2012-01-01 00:00:00
abstract：:Adenomatous Polyposis Coli (APC) is a tumor suppressor protein involved in the initiation and progression of colon cancer. The most widely accepted function ofAPC is to participate to the Wnt signaling pathway, by downregulating beta-catenin and thereby controlling gene transcription and cell proliferation. However, A...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-1145-2_3
更新日期：2009-01-01 00:00:00
abstract：:Many cases of West's syndrome are inoperable, because there is no clear epileptic focus. In some cases, however, there is a structural abnormality which can be surgically removed. Dr. Hoffman discusses his experience with surgery for cortical dysplasia in West's syndrome. ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：
更新日期：2002-01-01 00:00:00
abstract：:In proteomic studies, liquid chromatography is commonly used to separate peptide mixtures prior to mass spectrometry (MS) detection. As an independent dimension of information from the information provided by the MS, peptide retention time information has been proven to be able to aid proteomic data analysis in many a...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-017-9523-4_7
更新日期：2015-01-01 00:00:00
abstract：:The results of these studies suggest that halothane, in addition to its effect of reducing the trans-sarcolemmal Ca2+ influx, has a direct effect on the function of the sarcoplasmic reticulum by making the organelle leaky to Ca2+ and reducing the amount of Ca2+ stored. Isoflurane, on the other hand, does not appear to...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-5979-1_11
更新日期：1991-01-01 00:00:00
abstract：:Stem cell-based therapy has shown exciting efficacy in pre-clinical studies on different neurodegenerative diseases (NDs). However, no clinically applicable stem-cell-derived neurons are available to the patients with NDs. There exist some obstacles associated with stem cell therapy, which need to be overcome in futur...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-981-15-4370-8_10
更新日期：2020-01-01 00:00:00
abstract：:Many similarities were observed in the behavioral and neurochemical actions of ethanol and chlordiazepoxide (CDZ) suggesting that these agents may share common mechanisms of action. However, similarities in these actions could not be explained by effects on a benzodiazepine binding site, since only CDZ interacted with...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4757-1419-7_76
更新日期：1980-01-01 00:00:00
