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991.
The new age of Precision Cancer Medicine, with specific biomarkers being used to direct targeted agents, generally concerns only a subset of patients within a certain histopathologically defined tumor type. This paradigm is challenged by the need to perform widespread molecular screening in certified laboratories, with results available to clinicians within reasonable timeframe. Tumor heterogeneity and clonal evolution must be considered in the decision making process. Adaptive and innovative clinical trial designs exploring predictive algorithms and reconsideration of traditional efficacy endpoints are required to rapidly translate scientific discoveries into patient care. Furthermore, international collaboration in cancer research and open discussions on the availability of investigational agents will likely redefine the drug development and approval process in the coming years. 相似文献
992.
Ana Rafaela Luz de Aquino Martins Hellen Bandeira de Pontes Santos Rodrigo Porpino Mafra Cassiano Francisco Weege Nonaka Lélia Batista de Souza Leão Pereira Pinto 《Journal of cranio-maxillo-facial surgery》2018,46(10):1741-1747
This study evaluated the lymphatic density and HIF-1α immunoexpression in lower lip squamous cell carcinoma (LLSCC) and their correlation with clinicopathological (nodal metastasis, clinical stage, histological grade, recurrence and disease outcome) and survival parameters in 20 metastatic and 20 non-metastatic LLSCCs. Lymphatic density was established by counting microvessels (D2-40+) at the tumor core (intratumoral lymphatic density, ILD) and at the invasive front (peritumoral lymphatic density, PLD) and percentages of immunopositive cells for HIF-1α were established. No statistically significant differences in lymphatic densities in relation to clinicopathological parameters were observed (P > 0.05). All cases exhibited nuclear and cytoplasmic HIF-1α immunoexpression, with relatively high percentages of positivity, but this expression was not statistically different in relation to clinicopathological variables (P > 0.05). Positive correlations were observed between ILD and PLD (P = 0.002), and between nuclear HIF-1α immunoexpression at the tumor core and ILD (P = 0.001). The results suggest ILD and PLD are not directly related to the development of lymph node metastasis in LLSCC. The striking expression of HIF-1α suggests the involvement of this protein in the etiopathogenesis of LLSCCs, possibly stimulating lymphangiogenesis at the tumor core. However, this protein does not seem to exert a determining influence on the biological aggressiveness of these tumors. 相似文献
993.
994.
Anne Kelly de Oliveira Nicolau Mantovani Ivete Aparecida de Mattias Sartori Luciana Reis Azevedo-Alanis Rodrigo Tiossi Flávia Noemy Gasparini Kiatake Fontão 《Oral and maxillofacial surgery》2018,22(3):297-301
Purpose
This retrospective chart review study assessed patient records to determine implant insertion torque (IT) and implant stability quotient (ISQ) values during implant placement to evaluate the correlation with cortical bone anchorage (mono- or bicortical).Methods
Primary stability data (IT during implant placement surgery and ISQ values immediately after implant placement) and cone beam computed tomography of 33 patients (165 implants) were assessed. Patients were divided into the following groups: G1, implants with apical cortical bone contact; G2, implants with bicortical bone contact (apical and cervical regions); and G3, implants with cervical cortical bone contact.Results
Sixty-eight implants were excluded due to cortical bone contact on regions other than implant apical or cervical. Ninety-seven implants were therefore assessed for this study. No implant failure was found after a mean 70.42-month follow-up time. Implants with bicortical anchorage (G2) showed higher IT (64.1 Ncm) during implant placement and higher ISQ values (76) (p?<?0.05). Monocortical implants (G1, apical, and G3, cervical) showed similar IT (G1 52.3 and G3 54.3) and ISQ values (G1 71.9 and G3 73) (p?>?0.05). No correlation (Pearson correlation coefficient) was found between the two stability measurement devices for the different cortical bone anchorages that were analyzed (G1 0.190, G2 0.039, and G3 ??0.027) (p?>?0.05).Conclusions
Insertion torque values and implant stability quotients were influenced by cortical bone contact. No significant correlation was found between IT and ISQ values—higher insertion torque values do not necessarily lead to higher implant stability quotients.995.
Live and let die: Hydrogen peroxide production by the commensal flora and its role in maintaining a symbiotic microbiome 下载免费PDF全文
Sylvio Redanz Xingqun Cheng Rodrigo A. Giacaman Carmen S. Pfeifer Justin Merritt Jens Kreth 《Molecular oral microbiology》2018,33(5):337-352
The majority of commensal oral streptococci are able to generate hydrogen peroxide (H2O2) during aerobic growth, which can diffuse through the cell membrane and inhibit competing species in close proximity. Competing H2O2 production is mainly dependent upon the pyruvate oxidase SpxB, and to a lesser extent the lactate oxidase LctO, both of which are important for energy generation in aerobic environments. Several studies point to a broad impact of H2O2 production in the oral environment, including a potential role in biofilm homeostasis, signaling, and interspecies interactions. Here, we summarize the current research regarding oral streptococcal H2O2 generation, resistance mechanisms, and the ecological impact of H2O2 production. We also discuss the potential therapeutic utility of H2O2 for the prevention/treatment of dysbiotic diseases as well as its potential role as a biomarker of oral health. 相似文献
996.
Guilherme Felipe Lenz Rodrigo Schneider Kelen M. F. Rossi de Aguiar Rafael A. Bini Juliano Alexandre Chaker Peter Hammer Giancarlo V. Botteselle Jorlandio F. Felix Ricardo Schneider 《RSC advances》2019,9(30):17157
The development of supported catalysts based on simple procedures without waste products and time-consuming steps is highly desirable. In this paper, self-supported nickel-based nanoparticles were obtained at the surface of the germanophosphate glasses by bottom-up process and evaluated as potential catalysts for the benzyl alcohol oxidation and bis(indolyl)methanes synthesis. A classical melt-quenching technique was used for preparing the nickel-doped germanophosphate glasses, followed by annealing under a hydrogen atmosphere at 400 °C for two different times. The approach enabled the synthesis of self-supported nanoparticles as a homogeneous film, covering the glass surface. The physical and chemical properties of synthesized glasses were characterized by UV-vis and Raman spectroscopies and thermal analysis. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were performed to monitor the growth process, morphology and chemical bonding structure of the nanoparticles surface.The development of supported catalysts based on simple procedures without waste products and time-consuming steps is highly desirable. 相似文献
997.
Rectus femoris injuries are extremely common in athletes, particularly in soccer players, rugby player, and sprinters. Magnetic resonance imaging (MRI) plays a key role in diagnosis, prognosis, and rehabilitation of these injuries. The current article discusses current concepts in the diagnosis and treatment of rectus femoris injuries in elite athletes, including a discussion of the less well known myofascial injuries and key prognostic factors as seen at MR imaging. 相似文献
998.
Vitório R Lirani-Silva E Barbieri FA Raile V Batistela RA Stella F Gobbi LT 《Gait & posture》2012,35(2):175-179
The current study addressed the role of visual information in the control of locomotion in people with Parkinson's disease. Twelve healthy individuals and 12 mild to moderate Parkinson's disease patients were examined while walking at self-selected velocities, under three visual sampling conditions: dynamic (normal lighting), static (static visual samples) and voluntary visual sampling. Subjects wore liquid crystal glasses for visual manipulation. Outcome measures included spatial-temporal parameters, braking and propulsive impulses, number of samples and total duration of voluntary visual samples. Interaction between groups and visual conditions was not observed for kinematic parameters or braking and propulsive impulses. There were no significant differences between groups for voluntary visual sampling variables. These findings suggest that the visual control of locomotion in Parkinson's disease patients was similar to that observed in controls. Furthermore, Parkinson's disease patients were not more dependent on visual information than healthy individuals for the locomotion control. 相似文献
999.
Furtado D Hachul H Andersen ML Castro RA Girão MB Tufik S 《International urogynecology journal》2012,23(3):255-267
In this article, we provide a concise review of the literature on nocturia and its interference with sleep and, consequently,
on quality of life. There are few studies addressing the possible influences of nocturia on sleep disruption. Nocturia is
a potential contributor to sleep disorders because affected individuals experience nonrestorative sleep due to frequent interruptions.
We also attempted to determine whether individuals with nocturia wake to urinate or, alternately, urinate because they are
awake. This review attempts to outline this specific association by examining the possible interactions with other medical
conditions and the pathophysiology and prevalence. Most studies have observed a higher prevalence among women; however, the
impact on quality of life is higher in men. Nocturia is not necessarily associated with natural aging. The exploration of
these topics provides information to clarify the implications of nocturia on sleep, sleep disruption, and other related consequences.
Additional evidence is still required to address the question of whether nocturia leads to disordered sleep or whether disordered
sleep leads to nocturia. 相似文献
1000.
J. Christian Winters Bernard Jacquetin Rodrigo Castro 《International urogynecology journal》2012,23(1):27-31