Concept Mapping as an Instructional Method to Support Critical Thinking in Occupational Therapy Students: A Pilot Study

In occupational therapy practice, critical thinking is a foundational skill for the delivery of effective care; however, there is limited evidence on the development of critical thinking skills in occupational therapy education. The purpose of this study was to explore the effects and student perceptions of concept mapping on critical thinking skills in occupational therapy education. This study used a quasi-experimental design with a retrospective pre-post assessment after two teaching conditions: (a) traditional lecture and (b) concept mapping. The same convenience sample of students was used for each condition. Additional outcome measures included assessment of student concept maps using a scoring rubric and a survey of students’ perceptions on the use of concept mapping. Results of the retrospective pre-post assessment indicated significant gains in student knowledge (

Profiling Critical Cancer Gene Mutations in Clinical Tumor Samples

Background: Detection of critical cancer gene mutations in clinical tumor specimens may predict patient outcomes and inform treatment options; however, high-throughput mutation profiling remains underdeveloped as a diagnostic approach. We report the implementation of a genotyping and validation algorithm that enables robust tumor mutation profiling in the clinical setting. Methodology: We developed and implemented an optimized mutation profiling platform (“OncoMap”) to interrogate ∼400 mutations in 33 known oncogenes and tumor suppressors, many of which are known to predict response or resistance to targeted therapies. The performance of OncoMap was analyzed using DNA derived from both frozen and FFPE clinical material in a diverse set of cancer types. A subsequent in-depth analysis was conducted on histologically and clinically annotated pediatric gliomas. The sensitivity and specificity of OncoMap were 93.8% and 100% in fresh frozen tissue; and 89.3% and 99.4% in FFPE-derived DNA. We detected known mutations at the expected frequencies in common cancers, as well as novel mutations in adult and pediatric cancers that are likely to predict heightened response or resistance to existing or developmental cancer therapies. OncoMap profiles also support a new molecular stratification of pediatric low-grade gliomas based on BRAF mutations that may have immediate clinical impact. Conclusions: Our results demonstrate the clinical feasibility of high-throughput mutation profiling to query a large panel of “actionable” cancer gene mutations. In the future, this type of approach may be incorporated into both cancer epidemiologic studies and clinical decision making to specify the use of many targeted anticancer agents

Profiling Critical Cancer Gene Mutations in Clinical Tumor Samples

BACKGROUND: Detection of critical cancer gene mutations in clinical tumor specimens may predict patient outcomes and inform treatment options; however, high-throughput mutation profiling remains underdeveloped as a diagnostic approach. We report the implementation of a genotyping and validation algorithm that enables robust tumor mutation profiling in the clinical setting. METHODOLOGY: We developed and implemented an optimized mutation profiling platform ("OncoMap") to interrogate approximately 400 mutations in 33 known oncogenes and tumor suppressors, many of which are known to predict response or resistance to targeted therapies. The performance of OncoMap was analyzed using DNA derived from both frozen and FFPE clinical material in a diverse set of cancer types. A subsequent in-depth analysis was conducted on histologically and clinically annotated pediatric gliomas. The sensitivity and specificity of OncoMap were 93.8% and 100% in fresh frozen tissue; and 89.3% and 99.4% in FFPE-derived DNA. We detected known mutations at the expected frequencies in common cancers, as well as novel mutations in adult and pediatric cancers that are likely to predict heightened response or resistance to existing or developmental cancer therapies. OncoMap profiles also support a new molecular stratification of pediatric low-grade gliomas based on BRAF mutations that may have immediate clinical impact. CONCLUSIONS: Our results demonstrate the clinical feasibility of high-throughput mutation profiling to query a large panel of "actionable" cancer gene mutations. In the future, this type of approach may be incorporated into both cancer epidemiologic studies and clinical decision making to specify the use of many targeted anticancer agents

A Strand Invasion 3′ Polymerization Intermediate of Mammalian Homologous Recombination

Initial events in double-strand break repair by homologous recombination in vivo involve homology searching, 3′ strand invasion, and new DNA synthesis. While studies in yeast have contributed much to our knowledge of these processes, in comparison, little is known of the early events in the integrated mammalian system. In this study, a sensitive PCR procedure was developed to detect the new DNA synthesis that accompanies mammalian homologous recombination. The test system exploits a well-characterized gene targeting assay in which the transfected vector bears a gap in the region of homology to the single-copy chromosomal immunoglobulin μ heavy chain gene in mouse hybridoma cells. New DNA synthesis primed by invading 3′ vector ends copies chromosomal μ-gene template sequences excluded by the vector-borne double-stranded gap. Following electroporation, specific 3′ extension products from each vector end are detected with rapid kinetics: they appear after 0.5 hr, peak at 3–6 hr, and then decline, likely as a result of the combined effects of susceptibility to degradation and cell division. New DNA synthesis from each vector 3′ end extends at least ∼1000 nucleotides into the gapped region, but the efficiency declines markedly within the first ∼200 nucleotides. Over this short distance, an average frequency of 3′ extension for the two invading vector ends is ∼0.007 events/vector backbone. DNA sequencing reveals precise copying of the cognate chromosomal μ-gene template. In unsynchronized cells, 3′ extension is sensitive to aphidicolin supporting involvement of a replicative polymerase. Analysis suggests that the vast majority of 3′ extensions reside on linear plasmid molecules

A Cluster of Pediatric Invasive Group A Streptococcus Disease in Melbourne, Australia, Coinciding with a High-Burden Influenza Season

Background Invasive group A streptococcal disease (IGAS) carries significant morbidity and mortality in children. Fluctuations in disease incidence are well documented. However, the modulating factors that contribute to these changes remain unclear. Prospective monitoring of IGAS cases in Victoria, Australia, showed an increased number of cases in 2017, coinciding with a peak of influenza illness. Methods Children identified to have IGAS are prospectively monitored in Melbourne through a disease surveillance network. Data on their presentation, investigations, and clinical course are collected. An increased number of cases identified between June 1, 2017, and October 31, 2017, have been retrospectively analyzed. Results We identified 22 cases of pediatric IGAS during the study period. Increased case detection occurred during a period of increased influenza disease. Of 11 children in our cohort who underwent respiratory viral testing, 4 were confirmed to have concurrent respiratory tract illnesses, and 2 were confirmed to have influenza.SCOPUS: ar.jDecretOANoAutActifinfo:eu-repo/semantics/publishe

Prospective Surveillance of Pediatric Invasive Group A Streptococcus Infection.

Invasive group A Streptococcus (GAS) disease has an incidence in high-income countries of 3 to 5 per 100000 per annum and a case-fatality ratio of 10% to 15%. Although these rates are comparable to those of invasive meningococcal disease in Australia before vaccine introduction, invasive GAS disease currently requires reporting in only 2 jurisdictions.info:eu-repo/semantics/publishe

Increase in Invasive Group A Streptococcal Disease among Australian Children Coinciding with Northern Hemisphere Surges

info:eu-repo/semantics/inPres