Bolus-Tracked Biphasic Contrast-Enhanced CT Imaging Following Microwave Liver Ablation Improves Ablation Zone Conspicuity and Semi-automatic Segmentation Quality.

Purpose: Contrast-enhanced CT (CECT) may be performed immediately following microwave liver ablation for assessment of ablative margins. However, practices and protocols vary among institutions. Here, we compare a standardized bolus-tracked biphasic CECT protocol and compare this with a single venous phase fixed delay protocol for ablation zone (AZ) assessment.

Benign Soft Tissue Lesions Responsible for Pain: When and How Should the IR Intervene.

In most of the cases Interventional Radiology techniques and therapies are proposed for the management of symptomatic soft tissue benign tumors responsible for pain and/or compression symptoms aiming to offer a curative intent by means of tumor necrosis with subsequent symptoms' management and improvement of life quality. The ablative therapies include chemical, thermal and non-thermal approaches while, trans-arterial (chemo)embolization also has a distinct role. Adjunct ancillary techniques should be performed whenever necessary to increase efficacy and safety and avoid or reduce complications.

Continual Versus Occasional Blood Pressure (COOL-BP) in Remote Hypertension Management.

Background: Remote hypertension management programs have emerged as potential solutions to improve poor rates of blood pressure (BP) control. The Continual Versus Occasional Blood Pressure (COOL-BP) Study investigated the feasibility and efficacy of using a cuffless wrist BP monitor in a remote hypertension (HTN) program.

Methods: COOL-BP was a prospective single-arm study within a larger HTN management program at Mass General Brigham (MGB).

Immunogenomic determinants of exceptional response to immune checkpoint inhibition in renal cell carcinoma.

Immune checkpoint inhibitors can lead to 'exceptional', durable responses in a subset of persons. However, the molecular basis of exceptional response (ER) to immunotherapy in metastatic clear cell renal cell carcinoma (mccRCC) has not been well characterized. Here we analyzed pretherapy genomic and transcriptomic data in treatment-naive persons with mccRCC treated with standard-of-care immunotherapies: (1) combination of programmed cell death protein and ligand 1 (PD1/PDL1) and cytotoxic T lymphocyte-associated protein 4 inhibitors (IO/IO) or (2) combination of PD1/PDL1 and vascular endothelial growth factor (VEGF) receptor inhibitors (IO/VEGF).

Prospective validation of ORACLE, a clonal expression biomarker associated with survival of patients with lung adenocarcinoma.

Human tumors are diverse in their natural history and response to treatment, which in part results from genetic and transcriptomic heterogeneity. In clinical practice, single-site needle biopsies are used to sample this diversity, but cancer biomarkers may be confounded by spatiogenomic heterogeneity within individual tumors. Here we investigate clonally expressed genes as a solution to the sampling bias problem by analyzing multiregion whole-exome and RNA sequencing data for 450 tumor regions from 184 patients with lung adenocarcinoma in the TRACERx study.

UW supplementation with AP39 improves liver viability following static cold storage.

Static cold storage of donor livers at 4 °C incompletely arrests metabolism, ultimately leading to decreases in ATP levels, oxidative stress, cell death, and organ failure. Hydrogen Sulfide (HS) is an endogenously produced gas, previously demonstrated to reduce oxidative stress, reduce ATP depletion, and protect from ischemia and reperfusion injury. HS is difficult to administer due to its rapid release curve, resulting in cellular death at high concentrations.

Divergent roles of mA in orchestrating brown and white adipocyte transcriptomes and systemic metabolism.

N-methyladenosine (mA) is among the most abundant mRNA modifications, yet its cell-type-specific regulatory roles remain unclear. Here we show that mA methyltransferase-like 14 (METTL14) differentially regulates transcriptome in brown versus white adipose tissue (BAT and WAT), leading to divergent metabolic outcomes. In humans and mice with insulin resistance, METTL14 expression differs significantly from BAT and WAT in the context of its correlation with insulin sensitivity.

LGR5 as a diagnostic marker for dysplasia in serrated polyps.

Aims: WNT signalling pathway dysregulation is often a critical early component in colorectal neoplasia, particularly the chromosomal instability pathway. Using two WNT reporters, and , we sought to assess whether these polyps demonstrate predictable expression patterns and if these patterns show diagnostic value.

Methods: We evaluated 23 adenomas (TA), 23 sessile serrated lesions (SSLs), 14 SSL with dysplasia and 38 traditional serrated adenomas (TSA).

Identifying the most effective acute stress induction methods for producing SAM- and HPA-related physiological responses: a meta-analysis.

Background And Objectives: Laboratory-based stress inductions are commonly used to elicit acute stress but vary widely in their procedures and effectiveness. We compared the effects of stress induction techniques on measures of two major biological stress systems: the early sympathetic-adrenal-medullary (SAM) and the delayed hypothalamic-pituitary-adrenal (HPA) axis response.

Design: A review and meta-analysis to examine the relationship between stress induction techniques on cardiorespiratory and salivary measures of SAM and HPA system activity.

The "Outline Sign": Thin Hyperenhancing Perimeter as an MR Imaging Feature of Meningioma. A Useful Tool in the Temporal Bone Region for Differentiating Meningiomas from Schwannomas and Paragangliomas.

Background And Purpose: This study investigates the practicality and utility of the "outline sign," which refers to the thin curvilinear hyperenhancing line that may be seen along the margin of a meningioma on a spin-echo postcontrast T1-weighted image. For cases in which the differential diagnosis may include other tumors, visualization of the outline sign may help to increase the diagnostic confidence for a meningioma. Therefore, in the temporal bone region such as the cerebellopontine angle or jugular foramen, where differential considerations may include a schwannoma or paraganglioma, we additionally investigated whether the outline sign may be observed in these nonmeningioma lesions.

High-throughput determination of exchange rates of unmodified and PTM-containing peptides using HX-MS.

Despite the widespread use of MS for hydrogen/deuterium exchange measurements, no systematic, large-scale study has been conducted to compare the observed exchange rates in protein-derived, unstructured peptides measured by MS to the predicted exchange rates calculated from NMR-derived values and how neighboring residues and post-translational modifications influence those exchange rates. In this study, we sought to test the accuracy of predicted values by performing hydrogen exchange measurements on whole cell digests to generate an unbiased dataset of 563 unique peptides derived from naturally-occurring protein sequences. A remarkable 97% of observed exchange rates of peptides are within two-fold of predicted values.

Event-driven PrEP beyond cisgender men who have sex with men.

Despite advancements in existing antiretroviral-based prevention strategies, including daily oral, locally acting, and injectable options, there is a pressing need for more inclusive and flexible event-driven pre-exposure prophylaxis (PrEP) strategies for all. Event-driven or intermittent dosing of PrEP in populations beyond cisgender men who have sex with men would offer a promising alternative by fitting prevention into the diverse lifestyles of affected populations and thereby advancing health equity. Evidence from PrEP clinical trials, pharmacokinetic studies, modelling studies, and real-world observational research suggests that event-driven PrEP could be a flexible and inclusive option, yet optimal dosing has not been established across sex and gender spectrums.

DDEvENet: Evidence-based ensemble learning for uncertainty-aware brain parcellation using diffusion MRI.

In this study, we developed an Evidential Ensemble Neural Network based on Deep learning and Diffusion MRI, namely DDEvENet, for anatomical brain parcellation. The key innovation of DDEvENet is the design of an evidential deep learning framework to quantify predictive uncertainty at each voxel during a single inference. To do so, we design an evidence-based ensemble learning framework for uncertainty-aware parcellation to leverage the multiple dMRI parameters derived from diffusion MRI.

Plasma neurofilament light as a biomarker for vascular contributions to cognitive impairment and dementia.

Background: The MarkVCID consortium was established to address the paucity of biomarkers for vascular contributions to cognitive impairment and dementia (VCID), a leading cause of dementia. Plasma neurofilament light (NfL), a neuroaxonal injury marker elevated in several neurological and neurodegenerative diseases, was selected as one of the first biomarkers to be examined. We performed comprehensive instrumental and clinical validation of the Quanterix Simoa NfL assay using the first MarkVCID cohort.

Plasma p‐tau231 in the presenilin 1 E280A autosomal dominant Alzheimer’s disease kindred: a cross‐sectional and longitudinal cohort study.

Background: Plasma tau phosphorylated at threonine 231 (p‐tau231) is a promising novel biomarker of emerging Alzheimer's disease (AD) pathology. We aimed to characterize cross‐sectional and longitudinal plasma p‐tau231 measurements and estimated ages of biomarker onset in an exceptionally large number of presenilin (PSEN1) E280A (Glu280Ala) mutation carriers and age‐matched non‐carriers from the Colombian autosomal dominant Alzheimer’s disease kindred.

Method: We included a cohort of 722 PSEN1 E280A mutation carriers (mean age 36.

Instrumental and biological validation of PSMD as a VCID biomarker.

Background: Peak‐width of skeletonized mean diffusivity (PSMD) is an emerging biomarker of cerebral small vessel disease (cSVD)‐related vascular contributions to cognitive impairment and dementia (VCID). Higher PSMD values reflect greater white matter microstructural damage, and prior research has related PSMD to sporadic and monogenic forms of cSVD and worse cognitive function. Therefore, we proposed PSMD as a risk stratification biomarker for VCID.

CSF proteomics related to the neurovascular unit are associated with white matter hyperintensity volumes and cerebral microhemorrhages in autosomal dominant Alzheimer disease.

Background: Autosomal dominant Alzheimer disease (ADAD) is characterized by genetic mutations affecting the beta‐amyloid (Aβ) pathway. However, vascular and immune factors play important roles which are not completely understood. Understanding the function of the neurovascular unit (NVU) comprised of neurons, glial cells, and vasculature, at different disease stages appears ideal to developing and evaluating therapeutics.

Clinical performance of plasma P‐tau217 for the identification of primary Alzheimer’s disease pathology or co‐pathology in sporadic frontotemporal dementia.

Background: As new anti‐amyloid immunotherapies emerge for Alzheimer’s disease (AD), it is clear that early diagnosis of AD pathology is crucial for treatment success. This can be challenging in atypical presentations of AD and, together with our reliance on CSF or PET scans, can, at times, lead to delayed diagnosis. Here, we further explore the possible role of plasma tau phosphorylated at threonine 217 (P‐tau217) for the detection of primary AD or AD co‐pathology when frontotemporal dementia spectrum disorders are the main clinical presentation.

Predictive accuracy of plasma markers for Alzheimer’s disease, cerebrovascular disease, and cognition in a population‐based study.

Background: Validating the predictive value of plasma markers for Alzheimer’s disease, cerebrovascular disease and cognitive dysfunction in older adults representative of primary care settings, is needed to guide prevention and treatment decisions.

Method: At baseline, single molecule array plasma measures of Aβ42/40, pTau217, pTau181, GFAP and NfL were collected from 625 dementia‐free participants from the population‐based Rotterdam Study (mean age 63 years [range 54‐84], 51% women). After a mean follow‐up time of seven years [range 5‐9], participants underwent amyloid F‐florbetaben PET, brain MRI, and cognitive assessment.

Repeat Testing Reliability of Plasma pTau217 in Preclinical AD.

Background: Data from the Anti‐Amyloid Treatment in Asymptomatic Alzheimer's Disease (A4) trial (NCT02008357), including cognitively unimpaired participants with brain amyloid pathology on florbetapir F 18, demonstrates that levels of plasma P‐tau217, as detected by an electrochemiluminescence (ECL) immunoassay, is strong predictor of elevated cerebral amyloid on florbetapir PET in cognitively unimpaired individuals. Here we compare plasma P‐tau217 measures over 12 weeks using a P‐tau217 ECL immunoassay.

Method: A4 trial placebo‐group participants who had their first baseline and first post‐baseline plasma P‐tau217 samples collected within 175 days of each other were included in these analyses.