Abstract：
:The carbapenems have the broadest spectra of all beta-lactams but resistance still occurs, caused by target modification, impermeability or beta-lactamase production. Target modification or replacement is important in methicillin-resistant staphylococci, E. faecium and some pneumococci. These organisms present the greatest current threat to carbapenem efficacy. Impermeability to carbapenems arises in P. aeruginosa mutants, where it is contingent on loss of D2 outer membrane protein, a minor porin. This resistance functions only if the Pseudomonas retains its chromosomal group 1 beta-lactamase, and so reflects the interplay of impermeability and hydrolysis rather than impermeability alone; nevertheless porin loss is the critical change that engenders resistance. Resistance based on impermeability coupled to a group 1 beta-lactamase has also been described in E. cloacae, but demands loss of a major porin and is much rarer and less stable than in P. aeruginosa. Although group 1 beta-lactamases contribute to resistance in these organisms, they have only feeble carbapenemase activity. Chromosomal beta-lactamases with potent carbapenemase activity occur in most or all X. maltophilia, A. hydrophila and F. odoratum isolates. These enzymes, which cause carbapenem resistance when expressed copiously, are all zinc-dependent. Zinc carbapenemases also are a concern in B. fragilis, where they are encoded by the chromosomal DNA of c. 3% of isolates, though expressed by only 1%. Carbapenemases are extremely rare outside these species. Nevertheless, a plasmidic zinc carbapenemase was reported from one P. aeruginosa isolate and from several S. marcescens. Further carbapenemases, some not zinc-dependent, are known from a tiny numbers of Serratia, Enterobacter, and Acinetobacter isolates. Despite these various modes of resistance, carbapenems have retained their efficacy far better than have expanded-spectrum cephalosporins. Whether this advantage will be retained indefinitely is uncertain. If resistance does become more prevalent it may be possible to derivatize the carbapenems so as to extend their activity. There is already interest in the design of carbapenems that bind beta-lactam-resistant PBPs and, to an extent, in the development of carbapenemase inhibitors.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Livermore DMdoi
10.1007/978-1-4757-9203-4_3subject
Has Abstractpub_date
1995-01-01 00:00:00pages
25-47eissn
0065-2598issn
2214-8019journal_volume
390pub_type
杂志文章,评审abstract：:This chapter summarized the taxonomy and typing works of Yersinia pestis since it's firstly identified in Hong Kong in 1894. Phenotyping methods that based on phenotypic characteristics, including biotyping, serotyping, antibiogram analysis, bacteriocin typing, phage typing, and plasmid typing, were firstly applied in...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-024-0890-4_3
更新日期：2016-01-01 00:00:00
abstract：:Achromatopsia (ACHM) is caused by a progressive loss of cone photoreceptors leading to color blindness and poor visual acuity. Animal studies and human clinical trials have shown that gene replacement therapy with adeno-associate virus (AAV) is a viable treatment option for this disease. Although there have been succe...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4614-3209-8_87
更新日期：2014-01-01 00:00:00
abstract：:The relation of the cortex, cerebellum, and basal ganglia and their participation in movement disorders is presented. Studies have shown that lesions to the cortex will produce contralateral paralysis while damage to the basal ganglia or cerebellum will result in movement abnormalities. These data provide support for ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-2511-6_5
更新日期：1977-01-01 00:00:00
abstract：:In an experimental and clinical study a significant reduction of the postoperative edema after extracorporeal extremity perfusion under addition of Aprotinin was observed. Together with reduction of edema usually expected complications like pain and peripheral nerve damage could be reduced significantly. Preliminary, ...
journal_title：Advances in experimental medicine and biology
pub_type： 临床试验,杂志文章
doi：10.1007/978-1-4613-1057-0_73
更新日期：1988-01-01 00:00:00
abstract：:Our data indicate that the proinflammatory cytokine, IL-1alpha inhibits GR translocation and hormone-induced GR-mediated gene transcription, and, in conjunction with previous in vivo and in vitro studies, can be interpreted to suggest that cytokines have the capacity to contribute to glucocorticoid resistance and thus...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-585-37970-8_7
更新日期：1999-01-01 00:00:00
abstract：:Cardiovascular disease is the number one cause of death in the U.S and results in the loss of approximately one million lives and more than 400 billion U.S. dollars for treatments every year. Recently, tissue engineered blood vessels have been studied and developed as promising replacements for treatment with autologo...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-0445-3_8
更新日期：2018-01-01 00:00:00
abstract：:Based on studies using 3H-DFP as an active site titrant, it is suggested that surface binding in itself does not result in the formation of new active sites in the Hageman factor molecule. Moreover, it was found that surface-binding of human and bovine Hageman factor renders these molecules 100 to 1000 times more susc...
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：:So far, more than 20 species of Ganoderma (Lingzhi) fungi have been studied, including G. lucidum, G. sinense, G. japonicum, G. capense, G. australe, G. tsugae, G. applanatum, G. tropicus, G. boniense, G. duropora, G. resinaceum, G. theaecolum, G. cochlear, G. atrum, G. formosanum, G. boninense, G. colossum, G. concin...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-9867-4_3
更新日期：2019-01-01 00:00:00
abstract：:A key feature of biofilms is their production of an extracellular matrix. This material covers the biofilm cells, providing a protective barrier to the surrounding environment. During an infection setting, this can include such offenses as host cells and products of the immune system as well as drugs used for treatmen...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/5584_2016_6
更新日期：2016-01-01 00:00:00
abstract：:STAT (signal transducers and activators of transcription) are latent cytoplasmic transcription factors that function as downstream effectors of cytokine and growth factor receptor signaling. The canonical JAK/STAT signaling pathway involves the activation of Janus kinases (JAK) or growth factors receptor kinases, phos...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-007-4719-7_10
更新日期：2013-01-01 00:00:00
abstract：:Heart disease is widely believed to develop from two pathological processes. Circulating lipoproteins containing the nondegradable lipid, cholesterol, accumulate within the arterial wall and perhaps are oxidized to more toxic lipids. Both lipid accumulation and vascular reaction to the lipids lead to the gradual thick...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4614-0650-1_2
更新日期：2011-01-01 00:00:00
abstract：:Overpopulation of selected groups of animals is widely recognised as an issue that can have adverse effects on several current global problems, such as animal and human health, conservation and environmental changes. This review will, therefore, focus on recent novel contraception together with future technologies tha...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4939-0820-2_18
更新日期：2014-01-01 00:00:00
abstract：:The influence of bovine lactoferrin (bLf) on colon carcinogenesis was investigated in male F344 rats treated with azoxymethane (AOM). In experiment I, 2% and 0.2% bLf, and Bifidobacterium longum (B. longum) as a positive control at 3% were given in the diet for 4 weeks, along with two s.c. 15 mg/kg injections of AOM o...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4757-9068-9_34
更新日期：1998-01-01 00:00:00
abstract：:Enlarged fat cells in obese adipose tissue diminish capacity to store fat and are resistant to the anti-lipolytic effect of insulin. Insulin resistance (IR)-associated S-nitrosylation of insulin-signaling proteins increases in obesity. In accordance with the inhibition of insulin-mediated anti-lipolytic action, plasma...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-48382-5_8
更新日期：2017-01-01 00:00:00
abstract：:The revised sequence of DaaA means that the protein is 98% identical to the afimbrial adhesin regulator AFAA-III. While PapB repressed FimB OFF to ON switching in strain AAEC370A, this was not the case for DaaA. PapB, but not DaaA, reduced the level of expression of type 1 fimbriae, in static LB media. Attention is no...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/0-306-46840-9_20
更新日期：2000-01-01 00:00:00
abstract：:A major challenge in proteomic biomarker discovery and validation for psychiatric diseases is the inherent biological complexity underlying these conditions. There are also many technical issues which hinder this process such as the lack of standardization in sampling, processing and storage of bio-samples in preclini...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-52479-5_9
更新日期：2017-01-01 00:00:00
abstract：:Use of urea as a nonprotein supplement in the feeding of beef cattle and other ruminant animals is a technique of practical application. Urea has also been used in human feeding studies. Its early employment was that of an added source of amino nitrogen in studies designed to determine minimum requirements of the esse...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3366-1_7
更新日期：1978-01-01 00:00:00
abstract：:Functional oxygen-17 magnetic resonance (MR) imaging and localized spectroscopy is defined as the ensemble of MR measurements aiming at in vivo, noninvasive characterization of oxygen transport and utilization. After a brief description of the present status of in vivo 17O-MR, preliminary results are reported on oxyge...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-0205-0_35
更新日期：2003-01-01 00:00:00
abstract：:This article reviews the factors influencing myocardial oxygen supply and demand. The regulative mechanisms in coronary blood flow, especially in critical conditions, are explained. Myocardial oxygenation in coronary artery disease is discussed with special reference to pharmacological intervention. An extensive evalu...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-3428-0_63
更新日期：1992-01-01 00:00:00
abstract：:Mitochondria are independent double-membrane organelles responsible for energy production, specifically by completing oxidative phosphorylation. Mitochondria are essential to regulate energy metabolism, signaling pathways, and cell death. Mitochondrial DNA (mtDNA) can be altered by metabolic disorders, oxidative stres...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-10-6674-0_6
更新日期：2017-01-01 00:00:00
abstract：:We have briefly discussed immunogenetic studies of families with hyperglycemia which suggest the existence of at least four types of the disease: a) juvenile, insulin-dependent, ketosis prone diabetes determined by an autosomal recessive gene with 50% penetrance and in linkage with the HLA; b) juvenile, insulin-depend...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-9110-8_9
更新日期：1979-01-01 00:00:00
abstract：:The effects of IABP on the contractile state of the in situ canine heart was evaluated under control conditions and conditions of regional ischemia by determining the transient slope of the end-systolic pressure-volume line, T-Emax. For comparison, the conventional index reflecting contractility, dP/dtmax and other re...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：1989-01-01 00:00:00
abstract：:A community is an important attribute of networking, since people who join networks tend to join communities. Community detection is used to identify and understand the structure and organization of real-world networks, thus, it has become a problem of considerable interest. The study of communities is highly related ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-56246-9_16
更新日期：2017-01-01 00:00:00
abstract：:Tetrahydropapaveroline, the tetrahydroisoquinoline alkaloid derived from dopamine, is converted in vivo by rats and by rat liver and brain preparations to tetrahydroprotoberberine alkaloids. The latter alkaloids have also been identified for the first time in the urine of parkinsonian patients receiving L-dopa therapy...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4757-0632-1_6
更新日期：1975-01-01 00:00:00
abstract：:The steady active muscle force is reduced, but the force generation induced by a standard temperature jump becomes 2-3 fold faster with increased inorganic phosphate level, [Pi]. The increase in the rate of force generation also exhibits saturation at higher [Pi] levels and the relation is hyperbolic. These observatio...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：:Although a time-resolved near-infrared spectroscopy (TRS) system is difficult to make a measurement into 10 s or less at the moment, the system has a great advantage that it measures absolute values of hemoglobin concentrations. In the present study, using a device equipped with a TRS system, we examined individual di...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4419-1241-1_36
更新日期：2010-01-01 00:00:00
abstract：:Telocyte, different to fibroblast and dendritic cell, is a novel type of interstitial cell, whose key features are their smaller cell body with very long prolongations of uneven caliber, termed telopodes. The telocytes have been continuously discovered to be present in many tissues and organs. Whether telocytes exist ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-10-1061-3_24
更新日期：2016-01-01 00:00:00
abstract：:R3230Ac mammary tumors were grown in transparent window chambers implanted into the dorsal skin flap of 250 g Fischer 344 rats (see Dewhirst et al, 1992). The oxygen pressure distributions in the tumor and host tissue were measured by the oxygen dependent quenching of phosphorescence (see Vinogradov et al, 1996) after...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-4863-8_71
更新日期：1998-01-01 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：:We start by describing the functions of the uterus, its structure, both gross and fine, innervation and blood supply. It is interesting to note the diversity of the female's reproductive tract between species and to remember it when working with different animal models. Myocytes are the overwhelming cell type of the u...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-5895-1_10
更新日期：2019-01-01 00:00:00
