An integrated metagenomic, metabolomic and transcriptomic survey of Populus across genotypes and environments

Bridging molecular information to ecosystem-level processes would provide the capacity to understand system vulnerability and, potentially, a means for assessing ecosystem health. Here, we present an integrated dataset containing environmental and metagenomic information from plant-associated microbial communities, plant transcriptomics, plant and soil metabolomics, and soil chemistry and activity characterization measurements derived from the model tree species Populus trichocarpa. Soil, rhizosphere, root endosphere, and leaf samples were collected from 27 different P. trichocarpa genotypes grown in two different environments leading to an integrated dataset of 318 metagenomes, 98 plant transcriptomes, and 314 metabolomic profiles that are supported by diverse soil measurements. This expansive dataset will provide insights into causal linkages that relate genomic features and molecular level events to system-level properties and their environmental influences.

Exploring mental health approaches and curriculum in physiotherapy: an Australasian perspective

BACKGROUND

Exposure to mental health problems are becoming increasingly more frequent within physiotherapy. Physiotherapists recognize the need for a biopsychosocial approach, however their knowledge, assessment, and treatment skills specific to mental health problems requires further research.

PURPOSE

To profile the level of education and perception of education that physiotherapists have acquired specific to mental health problems; and to profile an understanding of the current practice of physiotherapists specific to mental health problems.

METHODS

An online survey addressed the aims of the study and collected data from physiotherapists in Australia and New Zealand (open between 20th of October 2022 to the 20th of March 2023).

RESULTS

139 respondents were included in the analysis. Physiotherapists had a perception that a significantly greater amount of coursework related to mental health needed to be included within their initial degree compared to what they received (mean difference of 20.0%, 95% CI: 17.5 to 22.5). This trend was evident irrespective of the degree level or the year of graduation. Higher perceived knowledge of anxiety (MD of 11.4, p = 0.001, ES: 0.5) and depression (MD of 11.8, p = 0.001, ES: 0.5) was evident in outpatient care physiotherapists. Lack of perceived knowledge is a reason for whether an assessment or treatment strategy is used with patients experiencing a mental health problem. Motivational interviewing and mindfulness were the most frequently used psychologically based techniques.

CONCLUSION

This study reveals the need to increase the amount of mental health and psychologically based techniques within Physiotherapy curriculum.

Computerized Cognitive Training in Mild Cognitive Impairment: Findings in African Americans and Caucasians

BACKGROUND

African Americans with MCI may be at increased risk for dementia compared to Caucasians. The effect of race on the efficacy of cognitive training in MCI is unclear.

METHODS

We used data from a two-site, 78-week randomized trial of MCI comparing intensive, home-based, computerized training with Web-based cognitive games or Web-based crossword puzzles to examine the effect of race on outcomes. The study outcomes were changes from baseline in cognitive and functional scales as well as MRI-measured changes in hippocampal volume and cortical thickness. Analyses used linear models adjusted for baseline scores. This was an exploratory study.

RESULTS

A total of 105 subjects were included comprising 81 whites (77.1%) and 24 African Americans (22.8%). The effect of race on the change from baseline in ADAS-Cog-11 was not significant. The effect of race on change from baseline to week 78 in the Functional Activities Questionnaire (FAQ) was significant with African American participants' FAQ scores showing greater improvements at weeks 52 and 78 (P = 0.009, P = 0.0002, respectively) than white subjects. Within the CCT cohort, FAQ scores for African American participants showed greater improvement between baseline and week 78, compared to white participants randomized to CCT (P = 0.006). There was no effect of race on the UPSA. There was no effect of race on hippocampal or cortical thickness outcomes.

CONCLUSIONS

Our preliminary findings suggest that web-based cognitive training programs may benefit African Americans with MCI at least as much as Caucasians, and highlight the need to further study underrepresented minorities in AD prevention trials. (Supported by the National Institutes of Health, National Institute on Aging; ClinicalTrials.gov number, NCT03205709.).

Factors Associated with Stereotactic Radiation Plan Revision in Prospective Peer Review

PURPOSE/OBJECTIVE(S)

Stereotactic radiotherapy (SR) is highly effective but has risks for serious toxicity. We sought to identify risk factors for SR plans requiring revision in a comprehensive, prospective peer review program conducted across a network of affiliated radiation centers. We hypothesized that increased physician experience and SR case volume would be associated with lower rates of SR plan revision.

MATERIALS/METHODS

Weekly peer review rounds were conducted to review SR cases for image fusion, contours, plan, and dose constraints, all prior to start of radiation. Cases recommended for revision were recorded and tracked prospectively. Factors potentially associated with case revision including body site, SR type, physician experience, and physician case load were assessed for significance using univariate and multivariable logistic regression.

RESULTS

From March 2019 to January 2023, 1,015 SR cases were prospectively reviewed, including 312 brain stereotactic radiosurgery (SRS), 190 multi-fraction brain SRS (fSRS), and 513 stereotactic body radiotherapy (SBRT). Revision was recommended in 177 cases (17%). The yearly revision rate was 21% in 2019, 16% in 2020, 17% in 2021, and 18% in 2022. There were 13 individual treating physicians with a median of 5 years' experience (range: 2-18 years), measured at the time of each SR case review. Physicians were categorized as junior (< = 2 years of experience), mid-career (3-9 years), or senior (> = 10 years). The physician's SR case volume in the preceding 3 months (median 25 cases) was dichotomized as low volume (< = 25) or high volume (>25). Logistic regression results are shown in Table 1. Statistical significance was determined by p <0.05.

CONCLUSION

SR plans utilizing SRS (as opposed to SBRT) and treated by physicians with high case volume had lower revision rates. Junior attendings had higher revision rates. These data imply a high value to peer review for junior attendings and for those with low SR case volume. Adequate case volume may be a critical factor for safe delivery of SR, analogous to surgical literature. Annual revision rates in the program remained stable over time, demonstrating the ongoing importance of an effective peer review program for SR.

Adjuvant Chemoradiotherapy within One Year of Resection for Molecularly Defined Astrocytoma

PURPOSE/OBJECTIVE(S)

Treatments for diffuse low-grade gliomas (LGG) are controversial. Level I evidence supports the use of adjuvant radiotherapy (RT) and PCV chemotherapy for histologic LGG, but integration of molecular biomarkers in recent WHO classification and the emergence of temozolomide chemotherapy for gliomas necessitates additional investigation of the optimal treatment and timing of postoperative interventions. We hypothesized molecularly-defined LGG (IDH-mutant astrocytoma (astro) and IDH-mutant, 1p/19q-codeleted oligodendroglioma (oligo)) may have different clinical outcomes following adjuvant RT (aRT) with chemotherapy (aRT+chemo) vs observation or chemo alone.

MATERIALS/METHODS

A retrospective analysis of consecutive adult patients diagnosed with WHO Grade 2 astrocytoma or oligodendroglioma who underwent initial resection at a single institution from January 1998 to November 2017 was performed. Wilcoxon rank sum and Chi-squared tests were used to compare continuous and categorical variables, respectively. Survival analyses were performed using the Kaplan-Meier method and Cox proportional hazards models. Patients without clinical progression or death were censored at the date of last follow-up. Pre-operative and post-operative T2 FLAIR hyperintense tumor volumes were quantified using 3D Slicer to calculate extent of resection (EOR).

RESULTS

A total of 342 patients with molecularly-defined LGG (178 astro, 164 oligo) were identified with a median follow up of 9.1 yr. 171 (50%) patients received RT during their treatment course, of which 31 (18%) were treated with aRT within 1 year of diagnosis. The median aRT dose was 54 Gy (range: 40-60 Gy). aRT was more likely for astro (58%) vs oligo (41%, p = 0.001) and for patients who had resections with lower median EOR (88% vs 95%, p = 0.014). 53 patients (15%) were treated with chemo alone, and 136 patients (40%) were treated with aRT+chemo. Temozolomide was used for 161 patients (85%). For astro, aRT+chemo was associated with longer PFS (median 14.9 yr) compared to observation (4.8 yr, p = 0.05), aRT without chemo (5.2 yr, p = 0.01), or chemo alone (4.7 yr, p = 0.02). For oligo, aRT+chemo was associated with longer PFS (median not reached) compared to aRT without chemo (1.6 yr, p = 0.03), but not when compared to observation (median not reached, p = 0.47), or chemo alone (7.9 yr, p = 0.45). Multivariate analysis showed preoperative tumor volume, EOR, and aRT+chemo (but not aRT or chemo alone) were independently associated with astro PFS compared to observation. Propensity matching based on pre-operative tumor volume, EOR, and age demonstrated longer astro PFS after aRT+chemo (14.9 yr) compared to observation or chemo alone (4.5 yr, p = 0.015), without significant difference in OS (18.2 vs. 11.5 yr, p = 0.40).

CONCLUSION

Retrospective data from a single institution support the use of adjuvant radiotherapy with chemotherapy for patients with molecular astrocytomas, while the role of this approach for oligodendrogliomas is unclear in this cohort.

Clinical Utility of Dual Phase FDG PET for Distinguishing Tumor Progression from Radionecrosis in the Modern Era

PURPOSE/OBJECTIVE(S)

Dual-phase PET CT, a technique by which two PET/CT scans are taken hours apart, has previously shown utility in differentiating radionecrosis (RN) from tumor progression (TP) after radiation for brain metastases. We sought to validate the utility of this technique in an independent, contemporary patient cohort. Understanding the difficulty of validation without the gold standard of pathologic confirmation in a majority of cases, we hypothesized that a dual-phase PET/CT indicating likely RN would correlate with improved overall survival (OS).

MATERIALS/METHODS

We performed a retrospective cohort study of all patients who received dual-phase FDG-PET between April 2015 and January 2023 at a single center for the purpose of distinguishing RN from TP in brain metastases previously treated with radiation. Scans were classified as indicating likely RN (dpPET-RN), likely TP (dpPET-TP), or unclear (dpPET-Unc) based on final radiology report. A Kaplan Meier (K-M) analysis was performed to evaluate differences in survival among the different dual-phase PET finding categories. An alpha level of 0.05 in the log-rank test was used to determine statistical significance.

RESULTS

We identified 36 patients who met inclusion criteria. All patients had received prior radiation - stereotactic radiosurgery (SRS), whole brain radiotherapy (WBRT) or both- to the lesion, and 21 (58%) had received surgery at some point prior to the dual phase PET CT. One patient received brachytherapy. Median time from the most recent course of radiation until dual-phase PET was 294 days, while median time from most recent surgery to dual-phase PET was 379 days. 14/36 (39%) of scans were called as dpPET-TP,15/36 (42%) were dpPET-RN, and 7/36 (19%) were dpPET-Unc. There were 10 cases where pathology was available after subsequent resection of the lesion. Five of the 10 path reports were concordant with the dual phase PET read, 5 were discordant. On K-M, median survival was 11 months (95% CI: 7.8 to 14.2 months) for dpPET-TP patients, 18 months (95% CI: 7.9 to 33.5 months) for dpPET-RN, and 12 months (95% CI: 0.0 to 51.2 months) for dpPET-Unc. On log rank testing, differences in the survival distribution for the different groups of dual-phase FDG-PET results were not statistically significant, χ2(2) = 4.085, p = .130.

CONCLUSION

Dual-phase PET CT has been proposed as a useful tool for distinguishing TP from RN after prior radiation. In the small subset of cases from our study with pathologic confirmation of outcomes, dual-phase PET failed to show high concordance with pathology. Although the dpPET-RN cohort had numerically superior OS compared to the dpPET-TP and dpPET-unc groups, this result was not statistically significant. Further independent validation of this imaging technique is warranted before it can be relied upon for routine clinical management.

Characterization of mechanical properties of soft tissues using sub-microscale tensile testing and 3D-Printed sample holder

Obtaining the mechanical properties of soft tissues is critical in many medical fields, such as regenerative medicine and surgical simulation training. Although various tissue-characterization methods have been developed, such as AFM, indentation, and elastography, there remain some limitations on their accuracy and validity for measuring small and fragile soft tissues. This paper presents a tensile testing technique to measure the mechanical properties of soft tissues directly and accurately. Tensile testing was chosen as the primary method because of its simple procedure and ability to derive mechanical properties without requiring many assumptions or complicated models. However, tensile testing on soft tissues presents challenges related to gripping the tissue sample without affecting its inherent properties, applying minuscule forces to the sample, and measuring the cross-section area and strain of the sample. To solve these issues, this study presents a sub-micro scale tensile testing system that uses a flexure mechanism and a novel 3D-printed sample holder for gripping the tissue samples. The system also measures tested samples' cross-section area and strain using two high-resolution cameras. The system was validated by testing standard materials and used to characterize the elastic modulus, yield stress, and yield strain of lung tissue slices from six different mice. The results from the validation tests showed a less than 2.5% error for elastic modulus values measured using the tensile tester. At the same time, results from the mice lung tissue measurements revealed qualitative findings that closely matched those seen in the literature and displayed low coefficient of variation values, demonstrating the high repeatability of the system.

22 Volumetric MRI; A Potential Outcome Measure of Muscle Reinnervation

Introduction

Improved outcome measures of muscle reinnervation would facilitate clinical translation of new therapies which hope to enhance human peripheral nerve repair. Valid outcome measures should be receptive to the biological process of muscle reinnervation and correlate with clinical assessments of muscular function. This study investigated the responsiveness of volumetric MRI to the biological process of muscle reinnervation and its relationship with clinical indices of muscular function.

Method

Twenty-five patients who underwent nerve transfer to reinnervate elbow flexor muscles were followed-up at a median time of 258 days (-86 to 1698 days) post-operatively for a mean of two (one to three) volumetric MRI assessments. Medical Research Council (MRC) grade, peak volitional force (PVF), muscular fatigue, co-contraction and Stanmore Percentage of Normal Elbow Assessment (SPONEA) was also measured at each appointment. The responsiveness of each parameter was compared using Pearson or Spearman correlation as appropriate.

Results

Elbow flexor muscle volume per unit BMI demonstrated responsiveness to the biological process of muscle reinnervation (R2=0.73, p &lt; 0.001) and correlated with patient reported impairments of reinnervated muscle; co-contraction (R2=0.63, p = 0.02) and muscle fatigue (R2=0.64, p = 0.04).

Conclusions

Volumetric MRI may is an excellent candidate as an outcome measure of muscle reinnervation.

Bringing function to structure: Root-soil interactions shaping phosphatase activity throughout a soil profile in Puerto Rico

Large areas of highly productive tropical forests occur on weathered soils with low concentrations of available phosphorus (P). In such forests, root and microbial production of acid phosphatase enzymes capable of mineralizing organic phosphorus is considered vital to increasing available P for plant uptake.We measured both root and soil phosphatase throughout depth and alongside a variety of root and soil factors to better understand the potential of roots and soil biota to increase P availability and to constrain estimates of the biochemical mineralization within ecosystem models.We measured soil phosphatase down to 1 m, root phosphatase to 30 cm, and collected data on fine-root mass density, specific root length, soil P, bulk density, and soil texture using soil cores in four tropical forests within the Luquillo Experimental Forest in Puerto Rico.We found that soil phosphatase decreased with soil depth, but not root phosphatase. Furthermore, when both soil and root phosphatase were expressed per soil volume, soil phosphatase was 100-fold higher that root phosphatase.Both root and soil factors influenced soil and root phosphatase. Soil phosphatase increased with fine-root mass density and organic P, which together explained over 50% of the variation in soil phosphatase. Over 80% of the variation in root phosphatase per unit root mass was attributed to specific root length (positive correlation) and available (resin) P (negative correlation). Synthesis: Fine-root traits and soil P data are necessary to understand and represent soil and root phosphatase activity throughout the soil column and across sites with different soil conditions and tree species. These findings can be used to parameterize or benchmark estimates of biochemical mineralization in ecosystem models that contain fine-root biomass and soil P distributions throughout depth.

Demonstration of a GaSb/GaAs Quantum Dot Intermediate Band Solar Cell Operating at Maximum Power Point

Intermediate band solar cells (IBSCs) promise high efficiencies while maintaining a low device structural complexity. A high efficiency can be obtained by harvesting below-band-gap photons, thus increasing the current, while at the same time preserving a high voltage. Here, we provide experimental proof that below-band-gap photons can be used to produce nonzero electrical work in an IBSC without compromising the voltage. For this, we manufacture a GaSb/GaAs quantum-dot IBSC. We use light biasing and make our cell operate at the maximum power point at 9 K. We measure the photocurrent response to absorption of photons with an energy of less than 1.15 eV while the cell is operating at 1.15 V. We also show that this result implies the existence of three quasi-Fermi levels linked to the three electronic bands in our device, as demanded by the IBSC theory to preserve the output voltage of the cell.

Mortality and secondary complications four years after traumatic spinal cord injury in Cape Town, South Africa

STUDY DESIGN

A prospective, regional, population-based study.

OBJECTIVES

(1) Determine the mortality rate and factors associated with it 4 years after a TSCI and (2) The point prevalence of secondary medical complications of survivors at 4 years.

SETTING

Communities of the Cape metropolitan area, South Africa.

METHODS

All persons (n = 145) sustaining a TSCI from 15 September 2013 to 14 September 2014 were eligible for follow-up at 4 years. Participants were contacted after 4 years. The next of kin, via verbal autopsy, was used to establish cause of death. Those who were alive at 4 years were asked to indicate any secondary medical complications. Logistic regression techniques were used to identify independently associated risk indicators for death and development of secondary complications, respectively.

RESULTS

Of the initial 145 persons, 87 were included and accounted for. Of these, 21 (24%) had died, 55 (63%) were alive and completed the survey, and 11 (13%) were classified as alive but did not submit the survey. The main cause of death reported was septicaemia (n = 7; 33%), followed by unknown natural causes (n = 7; 33%), then pressure injuries (n = 5; 24%). Out of the 55 persons alive, 89% had at least one medical complication at the time of enquiry, while more than 50% experienced 6 or more complications. The most common complications were pain (80%), muscle spasms (76%), sleeping problems (56%), and bladder dysfunction (44%).

CONCLUSIONS

Almost one-quarter of persons with TSCI have died 4 years after injury. Also, secondary complications were found to be highly prevalent at 4 years. This information could be used to develop secondary complications prevention programmes to reduce premature deaths.

SPONSORSHIP

This study was funded by the Medical Research Council of South Africa within the Research Capacity Development Initiative.

Fetal lung interstitial tumor: Prenatal presentation of a rare fetal malignancy

Fetal lung interstitial tumor (FLIT) is a rare fetal malignancy that is typically diagnosed in the postnatal period, or, if recognized prenatally can mimic a benign lesion such as congenital pulmonary airway malformation. We present the earliest case of a FLIT tumor described by ultrasound and MRI at 26 weeks of gestation. Our case highlights features suggestive of FLIT including presentation later in gestation in combination with findings on fetal MRI such as a solid appearance with radiating curved bands of high signal within and along the periphery of the lesion (not as intensely high signal as the typical CPAM), possibly detailing a radiographic signature for these tumors. The role of betamethasone for these tumors is not known.

Perioperative intravenous contrast administration and the incidence of acute kidney injury after major gastrointestinal surgery: prospective, multicentre cohort study

BACKGROUND

This study aimed to determine the impact of preoperative exposure to intravenous contrast for CT and the risk of developing postoperative acute kidney injury (AKI) in patients undergoing major gastrointestinal surgery.

METHODS

This prospective, multicentre cohort study included adults undergoing gastrointestinal resection, stoma reversal or liver resection. Both elective and emergency procedures were included. Preoperative exposure to intravenous contrast was defined as exposure to contrast administered for the purposes of CT up to 7 days before surgery. The primary endpoint was the rate of AKI within 7 days. Propensity score-matched models were adjusted for patient, disease and operative variables. In a sensitivity analysis, a propensity score-matched model explored the association between preoperative exposure to contrast and AKI in the first 48 h after surgery.

RESULTS

A total of 5378 patients were included across 173 centres. Overall, 1249 patients (23·2 per cent) received intravenous contrast. The overall rate of AKI within 7 days of surgery was 13·4 per cent (718 of 5378). In the propensity score-matched model, preoperative exposure to contrast was not associated with AKI within 7 days (odds ratio (OR) 0·95, 95 per cent c.i. 0·73 to 1·21; P = 0·669). The sensitivity analysis showed no association between preoperative contrast administration and AKI within 48 h after operation (OR 1·09, 0·84 to 1·41; P = 0·498).

CONCLUSION

There was no association between preoperative intravenous contrast administered for CT up to 7 days before surgery and postoperative AKI. Risk of contrast-induced nephropathy should not be used as a reason to avoid contrast-enhanced CT.

Correlation between work impairment, scores of rhinitis severity and asthma using the MASK-air® App

BACKGROUND

In allergic rhinitis, a relevant outcome providing information on the effectiveness of interventions is needed. In MASK-air (Mobile Airways Sentinel Network), a visual analogue scale (VAS) for work is used as a relevant outcome. This study aimed to assess the performance of the work VAS work by comparing VAS work with other VAS measurements and symptom-medication scores obtained concurrently.

METHODS

All consecutive MASK-air users in 23 countries from 1 June 2016 to 31 October 2018 were included (14 189 users; 205 904 days). Geolocalized users self-assessed daily symptom control using the touchscreen functionality on their smart phone to click on VAS scores (ranging from 0 to 100) for overall symptoms (global), nose, eyes, asthma and work. Two symptom-medication scores were used: the modified EAACI CSMS score and the MASK control score for rhinitis. To assess data quality, the intra-individual response variability (IRV) index was calculated.

RESULTS

A strong correlation was observed between VAS work and other VAS. The highest levels for correlation with VAS work and variance explained in VAS work were found with VAS global, followed by VAS nose, eye and asthma. In comparison with VAS global, the mCSMS and MASK control score showed a lower correlation with VAS work. Results are unlikely to be explained by a low quality of data arising from repeated VAS measures.

CONCLUSIONS

VAS work correlates with other outcomes (VAS global, nose, eye and asthma) but less well with a symptom-medication score. VAS work should be considered as a potentially useful AR outcome in intervention studies.

Schedule feasibility and workflow for additive manufacturing of titanium plates for ranioplasty in canine skull tumors

Background

Additive manufacturing has allowed for the creation of a patient-specific custom solution that can resolve many of the limitations previously reported for canine cranioplasty. The purpose of this pilot study was to determine the schedule feasibility and workflow in manufacturing patient-specific titanium implants for canines undergoing cranioplasty immediately following craniectomy.

Results

Computed tomography scans from patients with tumors of the skull were considered and 3 cases were selected. Images were imported into a DICOM image processing software and tumor margins were determined based on agreement between a board-certified veterinary radiologist and veterinary surgical oncologist. Virtual surgical planning was performed and a bone safety margin was selected. A defect was created to simulate the planned intraoperative defect. Stereolithography format files of the skulls were then imported into a plate design software. In collaboration with a medical solution centre, a custom titanium plate was designed with the input of an applications engineer and veterinary surgery oncologist. Plates were printed in titanium and post-processed at the solution centre. Total planning time was approximately 2 h with a manufacturing time of 2 weeks.

Conclusions

Based on the findings of this study, with access to an advanced 3D metal printing medical solution centre that can provide advanced software and printing, patient-specific additive manufactured titanium implants can be planned, created, processed, shipped and sterilized for patient use within a 3-week turnaround.

A-81 MoCA Cutoffs for English/ Spanish Bilingual Veterans Assessed in English

Objective

The Montreal Cognitive Assessment (MoCA) is a well-known screener of global cognitive functioning. Multiple studies have determined optimal cutoff scores for detection of cognitive impairment in various clinical populations. This study aims to determine appropriate cutoff scores in a clinically mixed bilingual (English/Spanish) sample.

Methods

A sample of n = 57 self-identified bilingual veterans referred for neuropsychological evaluation at a VA hospital completed the MoCA as part of a full battery. All tests were administered in English. The majority were male (96.4%), Hispanic/Latinx, with 14.65 mean years of education. Only MoCA total score without adding one point for ≤12 years of education was included. Descriptive statistics were used for sample characterization. ROC curve analysis assessed diagnostic accuracy of the MoCA for classification of cognitive impairment (CI). The CI group (n = 40) included both major or mild neurocognitive disorder. The nonimpaired group (n = 17) included persons with no CI or psychiatric diagnosis.

Results

ROC curve analysis was significant (p < .001) with an AUC of .857 (95% confidence interval .746-.969). A cutoff score of ≤24 was yielded an optimal balance of sensitivity (.900) and specificity (.706). Follow-up independent samples t-test and ANOVA were conducted to examine differences between groups.

Conclusions

Among bilingual individuals, a cutoff of ≤24 on the MoCA maximized sensitivity and specificity of accurately identifying cases of cognitive impairment. Findings have implications for identifying patients requiring further neuropsychological assessment.

A-28 Stroop Performance in Bilingual Veterans

Objective

The Stroop Color and Word Test is a well-known measure of executive functioning. The aim of this study is to determine if Stroop performance is impacted by bilingualism.

Method

A clinic-referred sample of veterans (n = 245; Mage = 55.84; Medu = 13.87) in whom a cognitive disorder diagnosis was ruled out were selected for inclusion. Participants self-identified as monolingual English (n = 192) or bilingual English/Spanish (n = 53) and were deemed appropriate for completing neuropsychological evaluation in English. All participants were administered the Stroop as part of a larger battery of tests. Analysis of covariance (ANCOVA) was used to examine Stroop scores across monolingual/bilingual groups, controlling for age.

Results

Stroop Word (raw) was significantly lower among bilingual participants (M = 79.13, SD = 18.24) compared to monolingual participants (M = 85.22, SD = 16.7), F = 4.48, p = .035. Although Color (F = 3.01, p = .084) and Color-Word Interference trials (F = 2.36, p = .125) were not significantly different across groups, there was a trend. When scores on the Color-Word Interference subtest were corrected using the Golden Equation, there were no significant group differences (F = .002, p = .966).

Conclusions

Bilingualism was related to reduced performance on speeded word-reading. Although there were no statistical differences on color-naming or inhibition, the sample size may have impacted statistical power. Despite this, there was no evidence of even a trend towards significance when applying the Golden Equation to correct for speed of word-reading and color-naming. Findings indicate Stroop is a valid measure of inhibitory control among bilingual individuals who are appropriate for completing testing in English, so long as adjustments are made to account for speed on the Word, Color, and Color-Word trials.

Pituitary Apoplexy in an Ectopic Pituitary Tumour

A case report of a patient with unilateral visual loss, due to infarction in an ectopic pituitary tumour, is presented. Good return of vision followed surgical removal of the tumour.

UX007 for the treatment of long chain-fatty acid oxidation disorders: Safety and efficacy in children and adults following 24weeks of treatment

BACKGROUND

Long-chain fatty acid oxidation disorders (LC-FAOD) lead to accumulation of high concentrations of potentially toxic fatty acid intermediates. Newborn screening and early intervention have reduced mortality, but most patients continue to experience frequent hospitalizations and significant morbidity despite treatment. The deficient energy state can cause serious liver, muscle, and heart disease, and may be associated with an increased risk of sudden death. Triheptanoin is a medium odd-chain fatty acid. Anaplerotic metabolites of triheptanoin have the potential to replace deficient tricarboxylic acid (TCA) cycle intermediates, resulting in net glucose production as a novel energy source for the treatment of LC-FAOD.

STUDY DESIGN

A single-arm, open-label, multicenter Phase 2 safety and efficacy study evaluated patients with severe LC-FAOD evidenced by ongoing related musculoskeletal, cardiac, and/or hepatic events despite treatment. After a four-week run-in on current regimen, investigational triheptanoin (UX007) was titrated to a target dose of 25-35% of total daily caloric intake. Patients were evaluated on several age/condition-eligible endpoints, including submaximal exercise tests to assess muscle function/endurance (12-minute walk test; 12MWT) and exercise tolerance (cycle ergometry), and health related quality of life (HR-QoL). Results through 24weeks of treatment are presented; total study duration is 78weeks.

RESULTS

Twenty-nine patients (0.8 to 58years) were enrolled; most qualified based on severe musculoskeletal disease. Twenty-five patients (86%) completed the 24-week treatment period. At Week 18, eligible patients (n=8) demonstrated a 28% increase (LS mean=+181.9 meters; p=0.087) from baseline (673.4meters) in 12MWT distance. At Week 24, eligible patients (n=7) showed a 60% increase in watts generated (LS mean=+409.3W; p=0.149) over baseline (744.6W) for the exercise tolerance test. Improvements in exercise tests were supported by significant improvements from baseline in the adult (n=5) self-reported SF-12v2 physical component summary score (LS mean=+8.9; p<0.001). No difference from baseline was seen in pediatric parent-reported (n=5) scores (SF-10) at Week 24. Eighteen patients (62%) had treatment-related adverse events, predominantly gastrointestinal (55%), mild-to-moderate in severity, similar to that seen with prior treatment with medium chain triglyceride (MCT) oil. One patient experienced a treatment-related serious adverse event of gastroenteritis. One patient discontinued from study due to diarrhea of moderate severity; the majority of patients (25/29; 86%) elected to continue treatment in the extension period.

CONCLUSIONS

In patients with severe LC-FAOD, UX007 interim study results demonstrated improved exercise endurance and tolerance, and were associated with positive changes in self-reported HR-QoL.

Abstract P1-03-06: Improvement in risk predictive value of Nottingham prognostic index by determining GP88 tumor tissue expression for estrogen receptor positive breast cancer patients

Background: The Nottingham Prognostic Index (NPI), which includes nodal status, tumor size and histological grade was established to provide predictive value information on post-surgery survival for primary breast cancer patients. Attempts to improve NPI's performance have included addition of other biomarker expression and morphological features such as vascular invasion. In the present study, we investigated whether expression of the autocrine growth and survival factor GP88 (progranulin), known to be overexpressed in breast cancer, whereas it is negative in normal mammary tissue, would improve NPI's predictive value.

Methods: We examined the tumor tissue GP88 expression by immunohistochemistry (IHC) in formalin fixed paraffin embedded tissue sections from 508 cases of estrogen receptor positive (ER+) invasive ductal carcinoma (IDC) with known clinical outcomes (disease-free and overall survivals) and with known NPI. GP88 IHC tumor tissue expression was determined using an anti-GP88 antibody (clone 6B3) developed in our laboratory. GP88 expression was scored (0, 1+, 2+, 3+) by two board certified pathologists and classified into two IHC score groups of GP88 &lt; 3+ (0, 1+, 2+) and GP88 = 3+. The correlation between GP88 scoring, NPI and disease-free (DFS) and overall survival (OS) outcomes was then examined by Kaplan Meier analysis, Cox proportional Hazard (CPH) ratio and Pearson's C2 test.

Results: Kaplan-Meier survival graphs categorized by NPI scores (&lt; 3.4, 3.4-5.4, and &gt;5.4) and by GP88 expression (&lt; 3+ and 3+) showed that for each NPI subgroup, patients with GP88 IHC score of 3+ had a worse disease-free survival (DFS) and overall survival (OS) than patients within the same NPI subgroup with tumors that had GP88 IHC score &lt; 3+. When adjusted for NPI, high GP88 score was highly significantly associated with recurrence with a hazard ratio of 3.30 (95% CI 2.12 to 5.14).

Conclusions: The data suggest that measuring GP88 tumor tissue expression by IHC at time of diagnosis for breast cancer patients with primary ER+ IDC could provide recurrence prediction and survival information complementary to that provided by the determination of NPI alone and thus may be useful for risk management of patients diagnosed with breast cancer.

Citation Format: Serrero G, Hawkins DM, Bejarano PA, Ioffe O, Tkaczuk KR, Elliott RE, Head JF, Phillips J, Godwin AK, Weaver J, Hicks D, Yue B. Improvement in risk predictive value of Nottingham prognostic index by determining GP88 tumor tissue expression for estrogen receptor positive breast cancer patients [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P1-03-06.