Publications by authors named "Michael Lu"

Article Synopsis
  • This study explores the use of advanced deep learning methods to automatically measure body composition from whole-body MRI scans, aiming to assess their ability to predict mortality in the general population.
  • The investigation was based on data from two large Western European cohort studies, focusing on key body composition metrics such as subcutaneous and visceral adipose tissue, skeletal muscle, and intramuscular fat.
  • Results indicate significant associations between several volumetric body composition measures and mortality risk, highlighting the potential of automated techniques to improve clinical outcomes related to cardiometabolic diseases and cancer.
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Purpose: Medical reports, governed by HIPAA regulations, contain personal health information (PHI), restricting secondary data use. Utilizing natural language processing (NLP) and large language models (LLM), we sought to employ publicly available methods to automatically anonymize PHI in free-text radiology reports.

Materials And Methods: We compared two publicly available rule-based NLP models (spaCy; NLP, accuracy-optimized; NLP, speed-optimized; iteratively improved on 400 free-text CT-reports (test set)) and one offline LLM approach (LLM-model, LLaMa-2, Meta-AI) for PHI-anonymization.

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Article Synopsis
  • A study on the effects of statin therapy in people living with HIV (PWH) found that while it did not reduce the overall incidence of COVID-19, it may lower the risk of severe cases of COVID-19 before vaccination.
  • The study analyzed data from 6,905 PWH and included variables such as age, gender, and race, showing that a majority had received COVID-19 vaccinations by the end of the study period.
  • Statin therapy demonstrated a potential protective effect against serious COVID-19 cases, as evidenced by a hazard ratio of 0.75, but the results were inconclusive due to fewer cases than expected.
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P21 activated kinase 6 (PAK6) is a serine-threonine kinase with physiological expression enriched in the brain and overexpressed in a number of human tumors. While the role of PAK6 in cancer cells has been extensively investigated, the physiological function of the kinase in the context of brain cells is poorly understood. Our previous work uncovered a link between PAK6 and the Parkinson's disease (PD)-associated kinase LRRK2, with PAK6 controlling LRRK2 activity and subcellular localization via phosphorylation of 14-3-3 proteins.

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Article Synopsis
  • REPRIEVE was a study that looked at how a medication called pitavastatin affects people with HIV and their risk of getting diabetes.
  • The study included over 7,700 participants aged 40 to 75 who didn't have diabetes at the start.
  • It found that people with more diabetes risk factors had a greater chance of developing diabetes, especially in places like South Asia.
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Objectives: To determine baseline prevalence of proteinuria and albuminuria among participants from the Randomized Trial to Prevent Vascular Events in HIV (REPRIEVE) and evaluate associated risk factors.

Design: Cross sectional analysis of a baseline sample of participants from the REPRIEVE Trial.

Methods: REPRIEVE is an international primary cardiovascular prevention randomized controlled trial (RCT) of pitavastatin calcium vs.

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Background: Coronary plaque is common among people with HIV (PWH) with low-to-moderate traditional atherosclerotic cardiovascular disease (ASCVD) risk.

Objectives: The purpose of this study was to determine the association of high-sensitivity cardiac troponin T (hs-cTnT) levels with coronary plaque characteristics and evaluate if hs-cTnT improves identification of these features beyond traditional ASCVD risk factors among PWH.

Methods: Among PWH receiving stable antiretroviral therapy with low-to-moderate ASCVD risk and no known history of ASCVD, hs-cTnT levels and measures of plaque by coronary computed tomography angiography were assessed.

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Article Synopsis
  • The study investigates the connection between lipoprotein (a) [Lp(a)] levels and the risk of obstructive coronary artery disease (CAD) and high-risk plaque (HRP) in patients with stable chest pain.
  • Researchers analyzed data from the PROMISE Trial, finding that elevated Lp(a) (≥50 mg/100 ml) correlates with greater chances of having stenosis (≥50% and ≥70%) in coronary arteries, regardless of low-density lipoprotein cholesterol (LDL-C) levels.
  • However, elevated Lp(a) was not linked to the presence of high-risk plaque when accounting for obstructive CAD, suggesting its role in CAD risk is more significant than in plaque features.
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Article Synopsis
  • This study evaluated the CXR-Age model, which uses deep learning to estimate a person's "radiographic age" based on chest X-rays, as a predictor of mortality risk in a large group of asymptomatic Asian individuals aged 50-80.
  • Researchers analyzed data from nearly 37,000 individuals over a median of 11 years, finding that a higher CXR-Age correlated with increased risk for all-cause mortality, cardiovascular, lung cancer, and respiratory disease deaths.
  • The study concluded that the CXR-Age model adds significant prognostic value beyond traditional clinical factors, indicating its potential usefulness across diverse populations.
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Introduction: A life course perspective in maternal, child, and family health allows for integrated exploration of outcomes, incorporating multifactorial determinants of health to interrogate sources of inequity and identify opportunities for intervention. This article explores the historical development, integration, and implications of the contemporary life course perspective in the field of maternal and child health (MCH), and particularly the people and events which institutionalized the framework as central to national and local MCH practice and research over the last decades.

Methods: Drawing on an oral history approach, key leaders of the life course movement in MCH were interviewed.

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A 74-year-old man presented with symptoms and noninvasive diagnostic studies suggestive of myocardial infarction. Coronary angiography revealed total occlusion of the distal right coronary artery with a unique accessory coronary ring that provided retrograde collateral flow to the left ventricle, demonstrating the importance of considering non-native vessels when identifying target lesions.

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Background: People with HIV (PWH) have a high burden of coronary plaques; however, the comparison to people without known HIV (PwoH) needs clarification.

Objectives: The purpose of this study was to determine coronary plaque burden/phenotype in PWH vs PwoH.

Methods: Nonstatin using participants from 3 contemporary populations without known coronary plaques with coronary CT were compared: the REPRIEVE (Randomized Trial to Prevent Vascular Events in HIV) studying PWH without cardiovascular symptoms at low-to-moderate risk (n = 755); the SCAPIS (Swedish Cardiopulmonary Bioimage Study) of asymptomatic community PwoH at low-to-intermediate cardiovascular risk (n = 23,558); and the PROMISE (Prospective Multicenter Imaging Study for Evaluation of Chest Pain) of stable chest pain PwoH (n = 2,291).

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People with human immunodeficiency virus (HIV, PWH) face an increased risk of cardiovascular disease (CVD) compared to the general population. We previously demonstrated that people with (versus without) HIV have higher macrophage-specific arterial infiltration in relation to systemic monocyte activation. We now show that select T lymphocyte subpopulations (naïve CD4 + , effector memory CD4 + , and central memory CD8 + ) are differentially associated with macrophage-specific arterial infiltration among participants with versus without HIV, with evidence of interaction by HIV status.

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Article Synopsis
  • - The current clinical practice utilizes qualitative and semi-quantitative measures to assess coronary artery disease via cardiac CT, but advancements in technology are paving the way for more quantitative approaches.
  • - Quantitative coronary CT angiography offers significant potential benefits for both patient management and research in the field of cardiology.
  • - This document seeks to establish clear definitions and standards for how quantitative measures of coronary artery disease should be performed and reported using cardiac CT.
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Objectives: To determine the relationship between lipoprotein particle size/number with hepatic steatosis (HS), given its association with traditional lipoproteins and coronary atherosclerosis.

Methods: Individuals with available CT data and blood samples enrolled in the PROMISE trial were studied. HS was defined based on CT attenuation.

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Purpose This special report outlines a retrospective observational study of CT fractional flow reserve (CT-FFR) analysis using dual-source coronary CT angiography (CTA) scans performed without heart rate control and its impact on clinical outcomes. Materials and Methods All patients who underwent clinically indicated coronary CTA between August 2020 and August 2021 were included in this retrospective observational study. Scans were performed in the late systolic to early diastolic period without heart rate control and analyzed at the interpreting physician's discretion.

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Hydrogen chloride is produced as a by-product in industrial processes on a million-ton scale. Since HCl is inherently dangerous, its storage and transport are avoided by, e.g.

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Background: Coronary artery disease (CAD) is a leading cause of death among the 38.4 million people with HIV globally. The extent to which cardiovascular polygenic risk scores (PRSs) derived in non-HIV populations generalize to people with HIV is not well understood.

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