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[Effect of the 3/4 crown and porcelain-fused crown restorations on the tooth displacement and the loading force of the supporting tissues].

A mechanical simulation model of tooth and alveolar bone in the application of 3/4 crown and porcelain-fused crown restorations was made and analyzed using three-dimensional finite element technique. The results obtained were as follows. 1. When the physiological tooth mobility was less than 150 microns, the teeth were sufficiently fixed using the splint and the bridge connected with more than two teeth, in the case of 20 percent absorption of the alveolar bone, and more than three teeth in the case of 40 percent absorption. In the case of 60 percent absorption, the teeth were fixed with the splint of six teeth connections, and were fixed with the bridge of five teeth connections. 2. The periodontium supporting force decreased markedly according to the increase of the number of the abutment teeth. 3. The teeth accompanied with the absorption of the alveolar bone were connected, in order to inhibit the tooth mobility and the periodontium supporting force. In this application, it had the inhibitory action when the replacing ratio of metal and ceramics to a crown of the tooth was less than 35 percent. 4. According to the finite element analysis, the design bases of fixed restorations applied in the teeth accompanied with the absorption of the alveolar bone were preferred.

Alveolar Bone Loss↗

The intracellular mobility of a viral membrane glycoprotein measured by confocal microscope fluorescence recovery after photobleaching.

Fluorescence recovery after photobleaching (FRAP) has been a powerful tool for characterizing the mobility of cell surface membrane proteins. However, the application of FRAP to the study of intracellular membrane proteins has been hampered by the lack of specific probes and their physical inaccessibility in the cytoplasm. We have measured the mobility of a model transmembrane protein, the temperature-sensitive vesicular stomatitis viral membrane glycoprotein (ts-O45-G), in transit from the endoplasmic reticulum (ER) to the Golgi complex. ts-O45-G accumulates in the ER at nonpermissive temperature (39.5 degrees C) and is transported via the Golgi complex to the surface upon shifting cells to the permissive temperature (31 degrees C). Rhodamine-labeled Fab fragments against a cytoplasmic epitope of ts-O45-G (rh-P5D4-Fabs) were microinjected into cells to visualize the intracellular viral membrane protein and to determine its mobility by FRAP with a confocal microscope. Moreover, we have measured the effects of microinjected antibodies against beta-COP on the mobility of ts-O45-G following release of the temperature block. FRAP was essentially complete when rh-P5D4-Fab-injected cells were bleached either following release of labeled ts-O45-G from the ER or upon its accumulation at 20 degrees C in the trans-Golgi network (TGN). In contrast, recovery was reduced by about one third when infected cells had been injected with antibodies that bind to beta-COP in vivo. The diffusion constant of mobile ts-O45-G under all conditions was approximately 10 x 10(-10) cm2/s. These results validate the feasibility of FRAP for the study of an intracellular transmembrane protein and provide the first evidence that such a protein is highly mobile.

Animals↗

CASPER, a Computer ASsisted PERicardial puncture system: first clinical results.

Pericardial puncture is the percutaneous insertion of a needle into the pericardial space to drain a pathological pericardial effusion. The challenge for the operating surgeon is to reach percutaneously a target zone in the vicinity of the mobile heart, in a soft-tissue environment. The surgeon's ability to accomplish this depends on his own mental picture of the effusion. CASPER is a navigation software using an optical localizer which assists the surgeon by enhancing the representation of the effusion and guiding the needle's progress. Using a localized and calibrated echographic probe, the surgeon acquires a set of images in the region of interest. This zone is then manually segmented on each image, a common zone is computed, and the surgeon defines a trajectory for the needle. During the puncture procedure, the surgeon follows the position of the localized needle on a computer monitor. After initial validation on an experimental phantom, a feasibility study was performed using canine and porcine models. The optical localization device was changed from an Optotrak to a Polaris device for easier use in the clinical setting. Prior to clinical application, various tests were performed concerning the mobility of the thoracic cage, the reproducibility of the thoracic position over several apneas, and the stability of anatomic structures relative to the thoracic cage. Finally, a first clinical application was successfully performed using this system. The present paper reports on these last two stages.

Echocardiography↗

Patch cramming reveals the mechanism of long-term suppression of cyclic nucleotides in intact neurons.

To understand cyclic nucleotide dynamics in intact cells, we used the patch-cramming method with cyclic nucleotide-gated channels as real-time biosensors for cGMP. In neuroblastoma and sympathetic neurons, both muscarinic agonists and nitric oxide (NO) rapidly elevate cGMP. However, muscarinic agonists also elicit a long-term (2 hr) suppression (LTS) of subsequent cGMP responses. Muscarinic agonists elevate cGMP by triggering Ca2+ mobilization, which activates NO synthase to produce NO, leading to the activation of soluble guanylate cyclase (sGC). Here we examine the mechanism of LTS. Experiments using direct intracellular cGMP injection demonstrate that enhancement of phosphodiesterase (PDE) activity, rather than depression of sGC activity, is responsible for LTS. Biochemical measurements show that both cGMP and cAMP content is suppressed, consistent with the involvement of a nonselective PDE. Application of pharmacological agents that alter Ca2+ mobilization from intracellular stores and experiments involving injection of the Ca2+ chelator BAPTA show that Ca2+ mobilization is necessary and sufficient for LTS induction but also show that LTS maintenance is Ca2+-independent. Protein phosphatase injection reverses LTS, and specific inhibitors of Ca2+/calmodulin kinase II (CaMKII) prevent induction and inhibit maintenance. The switch between the Ca2+ dependence of LTS induction to the Ca2+ independence of LTS maintenance is consistent with CaMKII autophosphorylation, similar to proposed mechanisms of hippocampal long-term potentiation. Because the molecular machinery underlying LTS is common to many cells, LTS may be a widespread mechanism for long-term silencing of cyclic nucleotide signaling.

Animals↗

Simultaneous chiral analyses of multiple analytes: case studies, implications and method development considerations.

The field of chiral separations had a modest beginning some two decades ago. However, due to rapid technological advancement coupled with simultaneous availability of innovative chiral stationary phases and novel chiral derivatization agents, the field of chiral separations has now totally outpaced many other separation fields. Keeping pace with rapid changes in the field of chiral separations, investigators continue to add stereoselective pharmacokinetic, pharmacodynamic, pharmacologic and toxicological data of new and/or marketed racemic compounds to the literature. Examination of the evolution of chiral separations suggests that in the beginning many investigators attempted to separate and quantify a single pair of enantiomers, adopting either direct (separation made on a chiral stationary phase) or indirect (separation made following precolumn conversion of enantiomers to corresponding diastereomers) approaches. However, more recent trends in chiral separations suggest that investigators are attempting to separate and quantify multiple pairs of enantiomers with available technologies. Added to this, some interesting trends have been observed in many of the recently reported chiral applications, including preferences regarding internal standard selection, mobile phase contents and composition, sorting out issues with mass spectrometric detection, determination of elution order, analytical manipulations of metabolite(s) without reference standards and addressing some specificity-related issues. This review mainly focuses on chiral separations involving multiple chiral analytes and attempts to justify the need for such chiral separations involving multiple analytes. In this context, several cases studies are described on the utility and applicability of such chiral separations under discrete headings to provide an account to the readership on the implications of such tasks. The topics of case studies covered in this review include: (a) therapy markers--differentiation from drug abuse and/or applicability in forensics; (b) role in pharmacogenetic/polymorphic evaluation; (c) monitoring and understanding the role of parent and active metabolite(s) in clinical and preclinical investigations; (d) exploration on the pharmacokinetic utility of an active chiral metabolite vis-a-vis the racemic parent moiety; (e) understanding the chirality play in delineating peculiar toxic effects; (f) exploration of chiral inversion phenomenon, and understanding the role of stereoselective metabolism. For the further benefit of readership, some select examples (n = 19) of the separation of multiple chiral analytes with appropriate information on chromatography, detection system, validation parameters and applicable conclusion are also provided. Finally, the review covers some useful considerations for method development involving multiple chiral analytes.

Animals↗

Coupling ion mobility separations, collisional activation techniques, and multiple stages of MS for analysis of complex peptide mixtures.

An ion trap/ion mobility/quadrupole/collision cell/time-of-flight mass spectrometer that incorporates a differentially pumped orifice-skimmer cone region at the back of the drift tube has been developed for the analysis of peptide mixtures. The combined approach allows a variety of strategies to be employed for collisionally activating ions, and fragments can be monitored by subsequent stages of mass spectrometry in a parallel fashion, as described previously (Anal. Chem. 2000, 72, 2737). Here, we describe the overall experimental approach in detail. Applications involving different aspects of the initial mobility separation and various collisional activation and parallel sequencing strategies are illustrated by examining several simple peptide mixtures and a mixture of tryptic peptides from beta-casein. Detection limits associated with various experimental configurations and the utility for analysis of complex systems are discussed.

Algorithms↗

Transforming nursing practice: clinical systems and the nursing unit of the future.

The healthcare industry has historically focused information system expenditures on financial systems. Finally, enabling the practice of clinicians through information systems is beginning to be viewed as a strategic initiative for hospitals and health systems. Vendor applications are now better able to support clinician workflow. Infrastructure is better able to support mobile devices, which bring information to the bedside. Implementation of nursing applications provides a unique opportunity to redesign inefficient and redundant documentation, thereby enabling greater efficiency. Healthcare organizations can jump-start nursing automation by setting a finite and clear tactical plan for initiatives to be rolled out within a year in a single location. The single location enables the organization to experience how well the initiatives integrate to support optimal delivery of care. This article explores nursing information technology initiatives planned to be deployed at a 1,000-bed teaching facility through the use of a Nursing Unit of the Future.

Hospitals, Teaching↗

Use of on-line hydrogen/deuterium exchange to facilitate metabolite identification.

Biotransformation studies performed on an investigational compound (I, represented by R1-CH(NH(2))-CO-N(R2)-CH(2)-S-R3) led to the identification of five metabolites (M1-M5). Based on LC/MS (liquid chromatography/mass spectrometry) analysis which included the use of H(2)O and D(2)O in the mobile phases, they were identified as the sulfoxide (M1), sulfone (M2), carbamoyl glucuronide (M3), N-glucuronide (M4), and N-glucoside (M5) metabolites, respectively. The structure of M3, a less commonly seen carbamoyl glucuronide metabolite, was established using on-line H/D (hydrogen/deuterium) exchange experiments conducted by LC/MS. H/D exchange experiments were also used to distinguish the S-oxidation structures of M1 and M2 from hydroxylation. Herein, the application of deuterium oxide as the LC/MS mobile phase for structural elucidation of drug metabolites in biological matrices is demonstrated.

Amides↗

Effectiveness and usability of artificial intelligence-powered assistive technologies in Supporting daily activities of children with cerebral palsy: a systematic review.

BACKGROUND: Cerebral Palsy (CP) is the main cause of motor disabilities in childhood, necessitating innovative approaches to rehabilitation and assistive technology (AT). Simultaneously, artificial intelligence (AI) is increasingly being integrated into devices to create more adaptive, personalized, and effective AT. This systematic review aimed to evaluate the effectiveness and usability of AI-powered assistive technologies designed to support daily activities and rehabilitation in children with CP. MATERIALS AND METHODS: Five databases, including Scopus, Web of Science, PubMed, Embase, and IEEE Xplore, were systematically searched, and 23 articles were included in the final analysis. Articles were identified, selected, and categorized into emerging thematic areas based on the primary function and application of the technology. RESULTS: Five key thematic topics were identified: 1) AI-driven motor rehabilitation and gait training for functional mobility; 2) intelligent assessment and monitoring systems for clinical decision support; 3) AI-supported communication, social interaction, and intention recognition tools; 4) gamified and virtual reality-based interventions to enhance engagement and usability; and 5) smart assistive systems supporting daily living and independent mobility. The findings demonstrate a strong trend toward the application of AI technologies in personalized, engaging, and data-driven interventions for children with CP. However, the field is predominantly in the proof-of-concept stage, with limitations including small sample sizes, lack of long-term clinical validation, challenges in user-centered design, and usability for children with CP. CONCLUSION: AI-powered assistive technologies hold significant potential for transforming the care of children with CP by enabling highly personalized and engaging interventions. To actualize this potential, future work must realize that practical application remains challenging owing to limited clinical validation, technological integration, and usability barriers for children with CP. Future research must prioritize user-centered design and multidisciplinary collaboration to ensure that AI and robotic advancements improve the usability and quality of life for children with CP.

Humans↗

A functional heparan sulfate mimetic implicates both heparanase and heparan sulfate in tumor angiogenesis and invasion in a mouse model of multistage cancer.

Heparan sulfate proteoglycans are integral components of the extracellular matrix that surrounds all mammalian cells. In addition to providing structural integrity, they act as a storage depot for a variety of heparan sulfate (HS)-binding proteins, including growth factors and chemokines. Heparanase is a matrix-degrading enzyme that cleaves heparan sulfate side chains from the core proteoglycans, thus liberating such HS-binding proteins, as well as potentially contributing to extracellular matrix degradation. Here, we report that heparanase mRNA and protein expression are increased in the neoplastic stages progressively unfolding in a mouse model of multistage pancreatic islet carcinogenesis. Notably, heparanase is delivered to the neoplastic lesions in large part by infiltrating Gr1+/Mac1+ innate immune cells. A sulfated oligosaccharide mimetic of heparan sulfate, PI-88, was used to inhibit simultaneously both heparanase activity and HS effector functions. PI-88 had significant effects at distinct stages of tumorigenesis, producing a reduction in the number of early progenitor lesions and an impairment of tumor growth at later stages. These responses were associated with decreased cell proliferation, increased apoptosis, impaired angiogenesis, and a substantive reduction in the number of invasive carcinomas. In addition, we show that the reduction in tumor angiogenesis is correlated with a reduced association of VEGF-A with its receptor VEGF-R2 on the tumor endothelium, implicating heparanase in the mobilization of matrix-associated VEGF. These data encourage clinical applications of inhibitors such as PI-88 for the many human cancers where heparanase expression is elevated or mobilization of HS-binding regulatory factors is implicated.

Amino Acid Sequence↗

Initial changes in posterior talar glide and dorsiflexion of the ankle after mobilization with movement in individuals with recurrent ankle sprain.

STUDY DESIGN: A double-blind randomized crossover experimental study with repeated measures, including a no-treatment control condition. OBJECTIVE: To evaluate the initial effect of 2 mobilization with movement (MWM) treatment techniques performed in weight bearing and non-weight bearing on posterior talar glide and talocrural dorsiflexion in individuals with recurrent lateral ankle sprain. BACKGROUND: MWM treatment techniques are commonly used in the treatment of musculoskeletal pain, such as lateral ankle sprain. Recent evidence indicates that a lack of posterior talar glide and weight-bearing ankle dorsiflexion are common physical impairments in individuals with recurrent ankle sprains. MWM of the ankle joint involves the application of a combined posterior talar glide mobilization and active dorsiflexion movement. The recurrent ankle sprain injury and the MWM treatment techniques for the ankle seemingly provide an appropriate model to further evaluate the effects and mechanism(s) of action of the MWM treatment techniques in a way that they have not been tested to date. METHODS: Sixteen subjects (mean +/- SD age, 19.8 +/- 2.3 years) with a history of recurrent lateral ankle sprain and deficits in posterior talar glide (71%) and weight-bearing dorsiflexion (34%) were studied. A within-subjects study design was used to evaluate the effect of 2 independent variables: treatment conditions (weight-bearing MWM, non-weight-bearing MWM, and a no-treatment control group) and time (pretreatment and posttreatment) on the dependent variables of posterior talar glide and weight-bearing dorsiflexion. RESULTS: Both the weight-bearing and non-weight-bearing MWM treatment techniques significantly improved posterior talar glide by 55% and 50% of the preapplication deficit between affected and unaffected sides, respectively, which was significantly greater than that of the control group (P<.001). The weight-bearing and non-weight-bearing MWM treatment techniques improved weight-bearing dorsiflexion by 26% (P<.017), compared to 9% for the control condition. The change in posterior talar glide, expressed as a proportion of pretreatment deficit, was correlated to the change in weight-bearing dorsiflexion (r = .88, P<.001), but only after the weight-bearing MWM technique. CONCLUSION: This preliminary study demonstrated an initial ameliorative effect of MWM treatment techniques on posterior talar glide and dorsiflexion range of motion in individuals with recurrent lateral ankle sprain. These results suggest that this technique should be considered in rehabilitation programs following lateral ankle sprain. This study provides justification for follow-up research of the long-term effects of MWM on lateral ankle sprain and proposes further work be conducted on the posterior talar glide test.

Adult↗

Mobilizing peripheral blood stem cells with high-dose G-CSF alone is as effective as with Dexa-BEAM plus G-CSF in lymphoma patients.

We compared retrospectively the efficacy of granulocyte colony stimulating factor (G-CSF) alone with chemotherapy plus G-CSF in mobilizing CD34-positive cells in patients with malignant lymphoma. 35 patients underwent peripheral blood stem cell (PBSC) collection following mobilization either with 24 microg/kg G-CSF for 4 consecutive days (n = 18) or Dexa-BEAM chemotherapy plus 5 microg/kg G-CSF (n = 17). High-dose G-CSF was well tolerated with only slight bone pain and/or myalgia. The Dexa-BEAM therapy required hospitalization with a median duration of 21 d. The median number of apheresis procedures in both groups was two (range two to four), resulting in a median of 5.3 and 5.1 x 10(6) CD34+ cells/kg. No patients in the G-CSF group, but one in the Dexa-BEAM group, failed to reach the target of collecting >2.0 x 10(6) CD34+ cells/kg. The number of CFU-GM (10.4 v 6.0 x 10(5)/kg) and of BFU-E (10.6 v 4.5 x 10(5)/kg; P = 0.04) was higher in the G-CSF group than in the Dexa-BEAM group. A subset analysis of CD34+ cells was performed in 16 patients showing a higher mean of Thy-1 (CD90w) coexpression in the G-CSF than in the Dexa-BEAM group (4.8 v 1.8%, P = 0.12). Additionally the percentage of CD34+/CD38- cells was higher in the G-CSF group (10.66% v 8.8%). However, these differences were not statistically significant. The median time to leucocyte and platelet engraftment after high-dose chemotherapy was slightly shorter in the G-CSF than in the Dexa-BEAM group (9 v 10 and 12 v 13.5 d, respectively). These results demonstrate that high-dose G-CSF is as effective as Dexa-BEAM plus G-CSF in mobilizing peripheral blood stem cells and produces prompt engraftment. The major advantages of G-CSF mobilization were the safe outpatient self-application and the fixed-day apheresis.

Adolescent↗

A mobile phone integrated health care delivery system of medical images.

With the growing computing capability of mobile phones, a handy mobile controller is developed for accessing the picture archiving and communication system (PACS) to enhance image management for clinicians with nearly no restriction in time and location using various wireless communication modes. The PACS is an integrated system for the distribution and archival of medical images that are acquired by different imaging modalities such as CT (computed tomography) scanners, CR (computed radiography) units, DR (digital radiography) units, US (ultrasonography) scanners, and MR (magnetic resonance) scanners. The mobile controller allows image management of the PACS including display, worklisting, query and retrieval of medical images in DICOM format. In this mobile system, a server program is developed in a PACS Web server which serves as an interface for client programs in the mobile phone and the enterprise PACS for image distribution in hospitals. The application processing is performed on the server side to reduce computational loading in the mobile device. The communication method of mobile phones can be adapted to multiple wireless environments in Hong Kong. This allows greater feasibility to accommodate the rapidly changing communication technology. No complicated computer hardware or software is necessary. Using a mobile phone embedded with the mobile controller client program, this system would serve as a tool for heath care and medical professionals to improve the efficiency of the health care services by speedy delivery of image information. This is particularly important in case of urgent consultation, and it allows health care workers better use of the time for patient care.

Cell Phone↗

Quantitative measurement of lipoprotein surface charge by agarose gel electrophoresis.

The electrophoretic mobilities of low density lipoprotein (LDL) and six pure proteins in a 0.5% agarose gel have been compared to literature electrophoretic mobility values determined by the Tiselius moving boundary method. There is a strong correlation (r = 0.99) between the electrophoretic mobilities determined by the two techniques. The electrophoretic behavior of charged particles smaller than very low density lipoproteins (VLDL) is not markedly perturbed by a 0.5% agarose matrix, and variations in mobility primarily reflect differences in particle valence and density of surface charge. Application of electrokinetic theory to derive protein and lipoprotein net charges from the electrophoretic mobilities in agarose yields a quantitative delineation of lipoprotein electrophoretic migration patterns wherein the beta mobility region comprises a surface potential range of -4.5 to -7.0 mV; the pre-beta region a range of -7.0 to -10.5 mV; the alpha mobility region a range of -10.5 to -12.5 mV and the serum albumin region a range of -12.5 to -14.0 mV. Because protein conformation and charge are critical in metabolic regulation, the agarose gel electrophoresis technique provides a valuable analytical tool that should help to elucidate further details of the structure-function relationships of serum lipoprotein particles.

Electrochemistry↗

Mobile phone based SCADA for industrial automation.

SCADA is the acronym for "Supervisory Control And Data Acquisition." SCADA systems are widely used in industry for supervisory control and data acquisition of industrial processes. Conventional SCADA systems use PC, notebook, thin client, and PDA as a client. In this paper, a Java-enabled mobile phone has been used as a client in a sample SCADA application in order to display and supervise the position of a sample prototype crane. The paper presents an actual implementation of the on-line controlling of the prototype crane via mobile phone. The wireless communication between the mobile phone and the SCADA server is performed by means of a base station via general packet radio service (GPRS) and wireless application protocol (WAP). Test results have indicated that the mobile phone based SCADA integration using the GPRS or WAP transfer scheme could enhance the performance of the crane in a day without causing an increase in the response times of SCADA functions. The operator can visualize and modify the plant parameters using his mobile phone, without reaching the site. In this way maintenance costs are reduced and productivity is increased.

Journal Article↗

Anabolic steroids and lymphocyte function in sedentary and exercise-trained rats.

The effects of the administration of suprapharmacological doses of anabolic steroids (AASs) on the immune system were examined in sedentary and exercise-trained rats by testing mobility and proliferative response in cultures of thymus and spleen-derived lymphocytes. Male Wistar rats were exercise-trained following two programmes of treadmill running of 3 months duration, differing in intensity, in the absence of treatment or with simultaneous i.m. administration of a suprapharmacological dose (10 mg/kg/week) of nandrolone decanoate (ND) or stanozolol (ST) during the past two months. At this dose ND reduced body weight gain, promoted a redistribution of immune cells from thymus to spleen, impaired lymphocyte mobility and inhibited the mitogen-induced proliferative response (about 90% inhibition for thymus-derived cells). Stanozolol (ST) treatment was without effect on body weight gain, but it also induced a redistribution of lymphocytes and modified the in vitro lymphocyte activity, although less severely than ND. Application of the high-intensity training programme reduced lymphocyte mobility and proliferation in vitro and a simultaneous treatment with anabolic steroids further impaired some of the immune cell responses. Application of the endurance-directed training programme, however, did not reduce mobility or mitogen-induced proliferation of lymphocytes, and normalized the activity of these cells in anabolic steroid-treated rats. So, endurance exercise, contrary to high-intensity training, could counteract the apparent negative effects of high doses of androgens on lymphocyte function.

Adrenal Glands↗

Efficient mobilization of E1-deleted adenovirus type 5 vectors by wild-type adenoviruses of other serotypes.

Mobilization of replication-deficient adenovirus vectors can lead to spread and shedding of the vector. Here we show that in cultured HepG2 cells wild-type (wt) adenoviruses of subgroup A (Ad12), B (Ad7, 11 and 16), C (Ad1, 2 and 5) and E (Ad4) can efficiently mobilize Ad5CMVluc, a DeltaE1DeltaE3-Ad5 vector carrying the firefly luciferase gene as reporter. In addition, we show that Ad5CMVluc can be propagated on Ad12E1-transformed human embryonic retinoblasts. This provides evidence that expression of the E1 region of Ad12 is sufficient for mobilizing DeltaE1-Ad5-derived vectors. Thus, in therapeutic applications of replication-defective Ad vectors any active Ad infection is of potential concern, independent of the serotype involved. To prevent vector mobilization by wt Ads, new vectors should be developed in which essential functions such as the initiation of DNA replication and genome packaging are restricted.

Adenovirus E1 Proteins↗