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Systematic Analysis Of Sars-Cov-2 Infection Of An Ace2-Negative Human Airway Cell, Maritza Puray-Chavez, Kyle M Lapak, Jennifer L Elliott, Dhaval P Bhatt, Ria Jasuja, Dana Q Lawson, Keanu Davis, Paul W Rothlauf, Zhuoming Liu, Nakyung Lee, Kasyap Tenneti, Jenna E Eschbach, Christian Shema Mugisha, Hung R Vuong, Laura A Vanblargan, Adam L Bailey, Michael S Diamond, Sean P J Whelan, Amjad Horani, Steven L Brody, Dennis Goldfarb, M Ben Major, Sebla B Kutluay, Et Al Jul 2021

Systematic Analysis Of Sars-Cov-2 Infection Of An Ace2-Negative Human Airway Cell, Maritza Puray-Chavez, Kyle M Lapak, Jennifer L Elliott, Dhaval P Bhatt, Ria Jasuja, Dana Q Lawson, Keanu Davis, Paul W Rothlauf, Zhuoming Liu, Nakyung Lee, Kasyap Tenneti, Jenna E Eschbach, Christian Shema Mugisha, Hung R Vuong, Laura A Vanblargan, Adam L Bailey, Michael S Diamond, Sean P J Whelan, Amjad Horani, Steven L Brody, Dennis Goldfarb, M Ben Major, Sebla B Kutluay, Et Al

Open Access Publications

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike (S) variants govern transmissibility, responsiveness to vaccination, and disease severity. In a screen for new models of SARS-CoV-2 infection, we identify human H522 lung adenocarcinoma cells as naturally permissive to SARS-CoV-2 infection despite complete absence of angiotensin-converting enzyme 2 (ACE2) expression. Remarkably, H522 infection requires the E484D S variant; viruses expressing wild-type S are not infectious. Anti-S monoclonal antibodies differentially neutralize SARS-CoV-2 E484D S in H522 cells as compared to ACE2-expressing cells. Sera from vaccinated individuals block this alternative entry mechanism, whereas convalescent sera are less effective. Although the H522 receptor remains …


Patient-Derived Ipsc-Cerebral Organoid Modeling Of The 17q11.2 Microdeletion Syndrome Establishes Crlf3 As A Critical Regulator Of Neurogenesis, Michelle L Wegscheid, Corina Anastasaki, Kelly A Hartigan, Olivia M Cobb, Jason B Papke, Jennifer N Traber, Stephanie M Morris, David H Gutmann Jul 2021

Patient-Derived Ipsc-Cerebral Organoid Modeling Of The 17q11.2 Microdeletion Syndrome Establishes Crlf3 As A Critical Regulator Of Neurogenesis, Michelle L Wegscheid, Corina Anastasaki, Kelly A Hartigan, Olivia M Cobb, Jason B Papke, Jennifer N Traber, Stephanie M Morris, David H Gutmann

Open Access Publications

Neurodevelopmental disorders are often caused by chromosomal microdeletions comprising numerous contiguous genes. A subset of neurofibromatosis type 1 (NF1) patients with severe developmental delays and intellectual disability harbors such a microdeletion event on chromosome 17q11.2, involving the NF1 gene and flanking regions (NF1 total gene deletion [NF1-TGD]). Using patient-derived human induced pluripotent stem cell (hiPSC)-forebrain cerebral organoids (hCOs), we identify both neural stem cell (NSC) proliferation and neuronal maturation abnormalities in NF1-TGD hCOs. While increased NSC proliferation results from decreased NF1/RAS regulation, the neuronal differentiation, survival, and maturation defects are caused by reduced cytokine receptor-like factor 3 (CRLF3) expression and …


Predicting The Environmental Suitability For Onchocerciasis In Africa As An Aid To Elimination Planning, Elizabeth A. Cromwell, Ziyad Al-Aly, Et Al Jul 2021

Predicting The Environmental Suitability For Onchocerciasis In Africa As An Aid To Elimination Planning, Elizabeth A. Cromwell, Ziyad Al-Aly, Et Al

Open Access Publications

Recent evidence suggests that, in some foci, elimination of onchocerciasis from Africa may be feasible with mass drug administration (MDA) of ivermectin. To achieve continental elimination of transmission, mapping surveys will need to be conducted across all implementation units (IUs) for which endemicity status is currently unknown. Using boosted regression tree models with optimised hyperparameter selection, we estimated environmental suitability for onchocerciasis at the 5 × 5-km resolution across Africa. In order to classify IUs that include locations that are environmentally suitable, we used receiver operating characteristic (ROC) analysis to identify an optimal threshold for suitability concordant with locations where …


Sleep Apnea And Fetal Growth Restriction (Safer) Study: Protocol For A Pragmatic Randomised Clinical Trial Of Positive Airway Pressure As An Antenatal Therapy For Fetal Growth Restriction In Maternal Obstructive Sleep Apnoea, Alex Hincker, Jacob Nadler, Suzanne Karan, Ebony Carter, Shay Porat, Barbara Warner, Yo-El S Ju, Arbi Ben Abdallah, Elizabeth Wilson, Ellen M Lockhart, Yehuda Ginosar Jun 2021

Sleep Apnea And Fetal Growth Restriction (Safer) Study: Protocol For A Pragmatic Randomised Clinical Trial Of Positive Airway Pressure As An Antenatal Therapy For Fetal Growth Restriction In Maternal Obstructive Sleep Apnoea, Alex Hincker, Jacob Nadler, Suzanne Karan, Ebony Carter, Shay Porat, Barbara Warner, Yo-El S Ju, Arbi Ben Abdallah, Elizabeth Wilson, Ellen M Lockhart, Yehuda Ginosar

Open Access Publications

INTRODUCTION: Fetal growth restriction (FGR) is a major contributor to fetal and neonatal morbidity and mortality with intrauterine, neonatal and lifelong complications. This study explores maternal obstructive sleep apnoea (OSA) as a potentially modifiable risk factor for FGR. We hypothesise that, in pregnancies complicated by FGR, treating mothers who have OSA using positive airway pressure (PAP) will improve birth weight and neonatal outcomes.

METHODS AND ANALYSIS: The Sleep Apnea and Fetal Growth Restriction study is a prospective, block-randomised, single-blinded, multicentre, pragmatic controlled trial. We enrol pregnant women aged 18-50, between 22 and 31 weeks of gestation, with established FGR based …


Protein Prenylation And Hsp40 In Thermotolerance Of Plasmodium Falciparum Malaria Parasites, Emily S Mathews, Andrew J Jezewski, Audrey R Odom John Jun 2021

Protein Prenylation And Hsp40 In Thermotolerance Of Plasmodium Falciparum Malaria Parasites, Emily S Mathews, Andrew J Jezewski, Audrey R Odom John

Open Access Publications

During its complex life cycle, the malaria parasite survives dramatic environmental stresses, including large temperature shifts. Protein prenylation is required during asexual replication of Plasmodium falciparum, and the canonical heat shock protein 40 protein (HSP40; PF3D7_1437900) is posttranslationally modified with a 15-carbon farnesyl isoprenyl group. In other organisms, farnesylation of Hsp40 orthologs controls their localization and function in resisting environmental stress. In this work, we find that plastidial isopentenyl pyrophosphate (IPP) synthesis and protein farnesylation are required for malaria parasite survival after cold and heat shock. Furthermore, loss of HSP40 farnesylation alters its membrane attachment and interaction with proteins in …


Sotorasib For Lung Cancers With Kras P.G12c Mutation, Ferdinandos Skoulidis, Ramaswamy Govindan, Et Al Jun 2021

Sotorasib For Lung Cancers With Kras P.G12c Mutation, Ferdinandos Skoulidis, Ramaswamy Govindan, Et Al

Open Access Publications

BACKGROUND: Sotorasib showed anticancer activity in patients with

METHODS: In a single-group, phase 2 trial, we investigated the activity of sotorasib, administered orally at a dose of 960 mg once daily, in patients with

RESULTS: Among the 126 enrolled patients, the majority (81.0%) had previously received both platinum-based chemotherapy and inhibitors of programmed death 1 (PD-1) or programmed death ligand 1 (PD-L1). According to central review, 124 patients had measurable disease at baseline and were evaluated for response. An objective response was observed in 46 patients (37.1%; 95% confidence interval [CI], 28.6 to 46.2), including in 4 (3.2%) who had …


Ketogenic Diet Restrains Aging-Induced Exacerbation Of Coronavirus Infection In Mice, Seungjin Ryu, Irina Shchukina, Maxim Artyomov, Et Al Jun 2021

Ketogenic Diet Restrains Aging-Induced Exacerbation Of Coronavirus Infection In Mice, Seungjin Ryu, Irina Shchukina, Maxim Artyomov, Et Al

Open Access Publications

Increasing age is the strongest predictor of risk of COVID-19 severity and mortality. Immunometabolic switch from glycolysis to ketolysis protects against inflammatory damage and influenza infection in adults. To investigate how age compromises defense against coronavirus infection, and whether a pro-longevity ketogenic diet (KD) impacts immune surveillance, we developed an aging model of natural murine beta coronavirus (mCoV) infection with mouse hepatitis virus strain-A59 (MHV-A59). When inoculated intranasally, mCoV is pneumotropic and recapitulates several clinical hallmarks of COVID-19 infection. Aged mCoV-A59-infected mice have increased mortality and higher systemic inflammation in the heart, adipose tissue, and hypothalamus, including neutrophilia and loss …


Balancing Serendipity And Reproducibility: Pluripotent Stem Cells As Experimental Systems For Intellectual And Developmental Disorders, Nickesha C Anderson, Pin-Fang Chen, Kesavan Meganathan, Wardiya Afshar Saber, Andrew J Petersen, Anita Bhattacharyya, Kristen L Kroll, Mustafa Sahin, Cross-Iddrc Human Stem Cell Working Group Jun 2021

Balancing Serendipity And Reproducibility: Pluripotent Stem Cells As Experimental Systems For Intellectual And Developmental Disorders, Nickesha C Anderson, Pin-Fang Chen, Kesavan Meganathan, Wardiya Afshar Saber, Andrew J Petersen, Anita Bhattacharyya, Kristen L Kroll, Mustafa Sahin, Cross-Iddrc Human Stem Cell Working Group

Open Access Publications

Reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) and their differentiation into neural lineages is a revolutionary experimental system for studying neurological disorders, including intellectual and developmental disabilities (IDDs). However, issues related to variability and reproducibility have hindered translating preclinical findings into drug discovery. Here, we identify areas for improvement by conducting a comprehensive review of 58 research articles that utilized iPSC-derived neural cells to investigate genetically defined IDDs. Based upon these findings, we propose recommendations for best practices that can be adopted by research scientists as well as journal editors.


Soluble P-Tau217 Reflects Amyloid And Tau Pathology And Mediates The Association Of Amyloid With Tau, Niklas Mattsson-Carlgren, Shorena Janelidze, Randall J Bateman, Ruben Smith, Erik Stomrud, Geidy E Serrano, Eric M Reiman, Sebastian Palmqvist, Jeffrey L Dage, Thomas G Beach, Oskar Hansson Jun 2021

Soluble P-Tau217 Reflects Amyloid And Tau Pathology And Mediates The Association Of Amyloid With Tau, Niklas Mattsson-Carlgren, Shorena Janelidze, Randall J Bateman, Ruben Smith, Erik Stomrud, Geidy E Serrano, Eric M Reiman, Sebastian Palmqvist, Jeffrey L Dage, Thomas G Beach, Oskar Hansson

Open Access Publications

Alzheimer's disease is characterized by β-amyloid plaques and tau tangles. Plasma levels of phospho-tau217 (P-tau217) accurately differentiate Alzheimer's disease dementia from other dementias, but it is unclear to what degree this reflects β-amyloid plaque accumulation, tau tangle accumulation, or both. In a cohort with post-mortem neuropathological data (N = 88), both plaque and tangle density contributed independently to higher P-tau217, but P-tau217 was not elevated in patients with non-Alzheimer's disease tauopathies (N = 9). Several findings were replicated in a cohort with PET imaging ("BioFINDER-2", N = 426), where β-amyloid and tau PET were independently associated with P-tau217. P-tau217 concentrations …


Reliance On Cox10 And Oxidative Metabolism For Antigen-Specific Nk Cell Expansion, Annelise Y Mah-Som, Molly P Keppel, Joshua M Tobin, Ana Kolicheski, Nermina Saucier, Veronika Sexl, Anthony R French, Julia A Wagner, Todd A Fehniger, Megan A Cooper Jun 2021

Reliance On Cox10 And Oxidative Metabolism For Antigen-Specific Nk Cell Expansion, Annelise Y Mah-Som, Molly P Keppel, Joshua M Tobin, Ana Kolicheski, Nermina Saucier, Veronika Sexl, Anthony R French, Julia A Wagner, Todd A Fehniger, Megan A Cooper

Open Access Publications

Natural killer (NK) cell effector functions are dependent on metabolic regulation of cellular function; however, less is known about in vivo metabolic pathways required for NK cell antiviral function. Mice with an inducible NK-specific deletion of Cox10, which encodes a component of electron transport chain complex IV, were generated to investigate the role of oxidative phosphorylation in NK cells during murine cytomegalovirus (MCMV) infection. Ncr1-Cox10


Examination Of A Blood-Brain Barrier Targeting Β-Galactosidase-Monoclonal Antibody Fusion Protein In A Murine Model Of Gm1-Gangliosidosis, Michael J Przybilla, Christine Stewart, Timothy W Carlson, Li Ou, Brenda L Koniar, Rohini Sidhu, Pamela J Kell, Xuntian Jiang, Jeanine R Jarnes, M Gerard O'Sullivan, Chester B Whitley Jun 2021

Examination Of A Blood-Brain Barrier Targeting Β-Galactosidase-Monoclonal Antibody Fusion Protein In A Murine Model Of Gm1-Gangliosidosis, Michael J Przybilla, Christine Stewart, Timothy W Carlson, Li Ou, Brenda L Koniar, Rohini Sidhu, Pamela J Kell, Xuntian Jiang, Jeanine R Jarnes, M Gerard O'Sullivan, Chester B Whitley

Open Access Publications

GM1-gangliosidosis is a lysosomal disease resulting from a deficiency in the hydrolase β-galactosidase (β-gal) and subsequent accumulation of gangliosides, primarily in neuronal tissue, leading to progressive neurological deterioration and eventually early death. Lysosomal diseases with neurological involvement have limited non-invasive therapies due to the inability of lysosomal enzymes to cross the blood-brain barrier (BBB). A novel fusion enzyme, labeled mTfR-GLB1, was designed to act as a ferry across the BBB by fusing β-gal to the mouse monoclonal antibody against the mouse transferrin receptor and tested in a murine model of GM1-gangliosidosis (β-gal


Placental Pathology In An Unsuspected Case Of Mucolipidosis Type Ii With Secondary Hyperparathyroidism In A Premature Infant, Parith Wongkittichote, Garland Michael Upchurch, Louis P Dehner, Timothy Wood, Jorge L Granadillo Jun 2021

Placental Pathology In An Unsuspected Case Of Mucolipidosis Type Ii With Secondary Hyperparathyroidism In A Premature Infant, Parith Wongkittichote, Garland Michael Upchurch, Louis P Dehner, Timothy Wood, Jorge L Granadillo

Open Access Publications

Mucolipidosis type II (MLII, MIM 252500) is a lysosomal storage disorders caused by defects in


Longitudinal Data Reveal Strong Genetic And Weak Non-Genetic Components Of Ethnicity-Dependent Blood Dna Methylation Levels, Chris Mckennan, Katherine Naughton, Catherine Stanhope, Meyer Kattan, George T O'Connor, Megan T Sandel, Cynthia M Visness, Robert A Wood, Leonard B Bacharier, Avraham Beigelman, Stephanie Lovinsky-Desir, Alkis Togias, James E Gern, Dan Nicolae, Carole Ober Jun 2021

Longitudinal Data Reveal Strong Genetic And Weak Non-Genetic Components Of Ethnicity-Dependent Blood Dna Methylation Levels, Chris Mckennan, Katherine Naughton, Catherine Stanhope, Meyer Kattan, George T O'Connor, Megan T Sandel, Cynthia M Visness, Robert A Wood, Leonard B Bacharier, Avraham Beigelman, Stephanie Lovinsky-Desir, Alkis Togias, James E Gern, Dan Nicolae, Carole Ober

Open Access Publications

Epigenetic architecture is influenced by genetic and environmental factors, but little is known about their relative contributions or longitudinal dynamics. Here, we studied DNA methylation (DNAm) at over 750,000 CpG sites in mononuclear blood cells collected at birth and age 7 from 196 children of primarily self-reported Black and Hispanic ethnicities to study race-associated DNAm patterns. We developed a novel Bayesian method for high-dimensional longitudinal data and showed that race-associated DNAm patterns at birth and age 7 are nearly identical. Additionally, we estimated that up to 51% of all self-reported race-associated CpGs had race-dependent DNAm levels that were mediated through …


A Sustained Type I Ifn-Neutrophil-Il-18 Axis Drives Pathology During Mucosal Viral Infection, Tania Lebratti, Ying Shiang Lim, Adjoa Cofie, Prabhakar Andhey, Xiaoping Jiang, Jason Scott, Maria Rita Fabbrizi, Ayşe Naz Ozantürk, Christine Pham, Regina Clemens, Maxim Artyomov, Mary Dinauer, Haina Shin May 2021

A Sustained Type I Ifn-Neutrophil-Il-18 Axis Drives Pathology During Mucosal Viral Infection, Tania Lebratti, Ying Shiang Lim, Adjoa Cofie, Prabhakar Andhey, Xiaoping Jiang, Jason Scott, Maria Rita Fabbrizi, Ayşe Naz Ozantürk, Christine Pham, Regina Clemens, Maxim Artyomov, Mary Dinauer, Haina Shin

Open Access Publications

Neutrophil responses against pathogens must be balanced between protection and immunopathology. Factors that determine these outcomes are not well-understood. In a mouse model of genital herpes simplex virus-2 (HSV-2) infection, which results in severe genital inflammation, antibody-mediated neutrophil depletion reduced disease. Comparative single-cell RNA-sequencing analysis of vaginal cells against a model of genital HSV-1 infection, which results in mild inflammation, demonstrated sustained expression of interferon-stimulated genes (ISGs) only after HSV-2 infection primarily within the neutrophil population. Both therapeutic blockade of IFNα/β receptor 1 (IFNAR1) and genetic deletion of IFNAR1 in neutrophils concomitantly decreased HSV-2 genital disease severity and vaginal IL-18 …


Cellular, Circuit And Transcriptional Framework For Modulation Of Itch In The Central Amygdala, Vijay K. Samineni, Jose G. Grajales-Reyes, Gary E. Grajales-Reyes, Eric Tycksen, Bryan A. Copits, Christian Pedersen, Edem S. Ankudey, Julian N. Sackey, Sienna B. Sewell, Michael R. Bruchas, Robert W. Gereau May 2021

Cellular, Circuit And Transcriptional Framework For Modulation Of Itch In The Central Amygdala, Vijay K. Samineni, Jose G. Grajales-Reyes, Gary E. Grajales-Reyes, Eric Tycksen, Bryan A. Copits, Christian Pedersen, Edem S. Ankudey, Julian N. Sackey, Sienna B. Sewell, Michael R. Bruchas, Robert W. Gereau

Open Access Publications

Itch is an unpleasant sensation that elicits robust scratching and aversive experience. However, the identity of the cells and neural circuits that organize this information remains elusive. Here, we show the necessity and sufficiency of chloroquine-activated neurons in the central amygdala (CeA) for both itch sensation and associated aversion. Further, we show that chloroquine-activated CeA neurons play important roles in itch-related comorbidities, including anxiety-like behaviors, but not in some aversive and appetitive behaviors previously ascribed to CeA neurons. RNA-sequencing of chloroquine-activated CeA neurons identified several differentially expressed genes as well as potential key signaling pathways in regulating pruritis. Finally, viral …


Common Dna Methylation Dynamics In Endometriod Adenocarcinoma And Glioblastoma Suggest Universal Epigenomic Alterations In Tumorigenesis, Jennifer A Karlow, Benpeng Miao, Xiaoyun Xing, Ting Wang, Bo Zhang May 2021

Common Dna Methylation Dynamics In Endometriod Adenocarcinoma And Glioblastoma Suggest Universal Epigenomic Alterations In Tumorigenesis, Jennifer A Karlow, Benpeng Miao, Xiaoyun Xing, Ting Wang, Bo Zhang

Open Access Publications

Trends in altered DNA methylation have been defined across human cancers, revealing global loss of methylation (hypomethylation) and focal gain of methylation (hypermethylation) as frequent cancer hallmarks. Although many cancers share these trends, little is known about the specific differences in DNA methylation changes across cancer types, particularly outside of promoters. Here, we present a comprehensive comparison of DNA methylation changes between two distinct cancers, endometrioid adenocarcinoma (EAC) and glioblastoma multiforme (GBM), to elucidate common rules of methylation dysregulation and changes unique to cancers derived from specific cells. Both cancers exhibit significant changes in methylation over regulatory elements. Notably, hypermethylated …


Phenotypic And Genomic Profiling Of Staphylococcus Argenteus In Canada And The United States And Recommendations For Clinical Result Reporting, Alireza Eshaghi, Carl Bommersbach, Sandra Zittermann, C A Burnham, Robin Patel, Audrey N Schuetz, Samir N Patel, Julianne V Kus May 2021

Phenotypic And Genomic Profiling Of Staphylococcus Argenteus In Canada And The United States And Recommendations For Clinical Result Reporting, Alireza Eshaghi, Carl Bommersbach, Sandra Zittermann, C A Burnham, Robin Patel, Audrey N Schuetz, Samir N Patel, Julianne V Kus

Open Access Publications

No abstract provided.


Experience With Liposomal Amphotericin B In Outpatient Parenteral Antimicrobial Therapy, Yvonne J Burnett, Andrej Spec, Mohamed M Ahmed, William G Powderly, Yasir Hamad May 2021

Experience With Liposomal Amphotericin B In Outpatient Parenteral Antimicrobial Therapy, Yvonne J Burnett, Andrej Spec, Mohamed M Ahmed, William G Powderly, Yasir Hamad

Open Access Publications

Outpatient parenteral antimicrobial therapy (OPAT) is a safe, effective, and convenient treatment strategy for patients receiving intravenous antimicrobials in the outpatient setting; however, data are limited describing the use and safety of liposomal amphotericin B (L-AMB). Records of patients receiving L-AMB OPAT between 1/1/2015 and 7/31/2018 were retrospectively reviewed. The primary objective was to describe the OPAT patient population discharged on L-AMB and evaluate factors associated with readmission and adverse events (AEs). Analysis was performed to evaluate for predictors of worse outcomes. Forty-two patients (67% male, median age 50 years) were identified, most of whom were treated for histoplasmosis. The …


Value Cmr: Towards A Comprehensive, Rapid, Cost-Effective Cardiovascular Magnetic Resonance Imaging, El-Sayed H Ibrahim, Luba Frank, Dhiraj Baruah, V Emre Arpinar, Andrew S Nencka, Kevin M Koch, L Tugan Muftuler, Orhan Unal, Jadranka Stojanovska, Jason C Rubenstein, Sherry-Ann Brown, John Charlson, Elizabeth M Gore, Carmen Bergom May 2021

Value Cmr: Towards A Comprehensive, Rapid, Cost-Effective Cardiovascular Magnetic Resonance Imaging, El-Sayed H Ibrahim, Luba Frank, Dhiraj Baruah, V Emre Arpinar, Andrew S Nencka, Kevin M Koch, L Tugan Muftuler, Orhan Unal, Jadranka Stojanovska, Jason C Rubenstein, Sherry-Ann Brown, John Charlson, Elizabeth M Gore, Carmen Bergom

Open Access Publications

Cardiac magnetic resonance imaging (CMR) is considered the gold standard for measuring cardiac function. Further, in a single CMR exam, information about cardiac structure, tissue composition, and blood flow could be obtained. Nevertheless, CMR is underutilized due to long scanning times, the need for multiple breath-holds, use of a contrast agent, and relatively high cost. In this work, we propose a rapid, comprehensive, contrast-free CMR exam that does not require repeated breath-holds, based on recent developments in imaging sequences. Time-consuming conventional sequences have been replaced by advanced sequences in the proposed CMR exam. Specifically, conventional 2D cine and phase-contrast (PC) …


A Genetic Screen For Regulators Of Muscle Morphogenesis In Drosophila, Tiffany Ou, Gary Huang, Beth Wilson, Paul Gontarz, James B Skeath, Aaron N Johnson May 2021

A Genetic Screen For Regulators Of Muscle Morphogenesis In Drosophila, Tiffany Ou, Gary Huang, Beth Wilson, Paul Gontarz, James B Skeath, Aaron N Johnson

Open Access Publications

The mechanisms that determine the final topology of skeletal muscles remain largely unknown. We have been developing Drosophila body wall musculature as a model to identify and characterize the pathways that control muscle size, shape, and orientation during embryogenesis (Johnson et al., 2013; Williams et al., 2015; Yang et al., 2020a; Yang et al., 2020b). Our working model argues muscle morphogenesis is regulated by (1) extracellular guidance cues that direct muscle cells toward muscle attachment sites, and (2) contact dependent interactions between muscles and tendon cells. While we have identified several pathways that regulate muscle morphogenesis, our understanding is far …


Bundle-Specific Associations Between White Matter Microstructure And Aβ And Tau Pathology In Preclinical Alzheimer's Disease, Alexa Pichet Binette, Tammie Benzinger, John Morris, Randall Bateman, Et Al May 2021

Bundle-Specific Associations Between White Matter Microstructure And Aβ And Tau Pathology In Preclinical Alzheimer's Disease, Alexa Pichet Binette, Tammie Benzinger, John Morris, Randall Bateman, Et Al

Open Access Publications

Beta-amyloid (Aβ) and tau proteins, the pathological hallmarks of Alzheimer's disease (AD), are believed to spread through connected regions of the brain. Combining diffusion imaging and positron emission tomography, we investigated associations between white matter microstructure specifically in bundles connecting regions where Aβ or tau accumulates and pathology. We focused on free-water-corrected diffusion measures in the anterior cingulum, posterior cingulum, and uncinate fasciculus in cognitively normal older adults at risk of sporadic AD and presymptomatic mutation carriers of autosomal dominant AD. In Aβ-positive or tau-positive groups, lower tissue fractional anisotropy and higher mean diffusivity related to greater Aβ and tau …


Perilipin 2 Downregulation In Β Cells Impairs Insulin Secretion Under Nutritional Stress And Damages Mitochondria, Akansha Mishra, Chen Kang, Rajan Sah, Et Al. May 2021

Perilipin 2 Downregulation In Β Cells Impairs Insulin Secretion Under Nutritional Stress And Damages Mitochondria, Akansha Mishra, Chen Kang, Rajan Sah, Et Al.

Open Access Publications

Perilipin 2 (PLIN2) is a lipid droplet (LD) protein in β cells that increases under nutritional stress. Downregulation of PLIN2 is often sufficient to reduce LD accumulation. To determine whether PLIN2 positively or negatively affects β cell function under nutritional stress, PLIN2 was downregulated in mouse β cells, INS1 cells, and human islet cells. β Cell-specific deletion of PLIN2 in mice on a high-fat diet reduced glucose-stimulated insulin secretion (GSIS) in vivo and in vitro. Downregulation of PLIN2 in INS1 cells blunted GSIS after 24-hour incubation with 0.2 mM palmitic acid. Downregulation of PLIN2 in human pseudoislets cultured at 5.6 …


Recovery Of Consciousness And Cognition After General Anesthesia In Humans, George A. Mashour, Ben J.A. Palanca, Wei Wang, Nan Lin, Maxwell Muench, Hannah Maybrier, Michael S. Avidan, Et Al May 2021

Recovery Of Consciousness And Cognition After General Anesthesia In Humans, George A. Mashour, Ben J.A. Palanca, Wei Wang, Nan Lin, Maxwell Muench, Hannah Maybrier, Michael S. Avidan, Et Al

Open Access Publications

Understanding how the brain recovers from unconsciousness can inform neurobiological theories of consciousness and guide clinical investigation. To address this question, we conducted a multicenter study of 60 healthy humans, half of whom received general anesthesia for 3 hr and half of whom served as awake controls. We administered a battery of neurocognitive tests and recorded electroencephalography to assess cortical dynamics. We hypothesized that recovery of consciousness and cognition is an extended process, with differential recovery of cognitive functions that would commence with return of responsiveness and end with return of executive function, mediated by prefrontal cortex. We found that, …


Genetic Causes Of Cardiomyopathy In Children: First Results From The Pediatric Cardiomyopathy Genes Study, Stephanie M Ware, Charles E Canter, Et Al May 2021

Genetic Causes Of Cardiomyopathy In Children: First Results From The Pediatric Cardiomyopathy Genes Study, Stephanie M Ware, Charles E Canter, Et Al

Open Access Publications

Background Pediatric cardiomyopathy is a genetically heterogeneous disease with substantial morbidity and mortality. Current guidelines recommend genetic testing in children with hypertrophic, dilated, or restrictive cardiomyopathy, but practice variations exist. Robust data on clinical testing practices and diagnostic yield in children are lacking. This study aimed to identify the genetic causes of cardiomyopathy in children and to investigate clinical genetic testing practices. Methods and Results Children with familial or idiopathic cardiomyopathy were enrolled from 14 institutions in North America. Probands underwent exome sequencing. Rare sequence variants in 37 known cardiomyopathy genes were assessed for pathogenicity using consensus clinical interpretation guidelines. …


Quantitative Signal Properties From Standardized Mris Correlate With Multiple Sclerosis Disability, Matthew R Brier, Abraham Z Snyder, Aaron Tanenbaum, Richard A Rudick, Elizabeth Fisher, Stephen Jones, Joshua S Shimony, Anne H Cross, Tammie L S Benzinger, Robert T Naismith May 2021

Quantitative Signal Properties From Standardized Mris Correlate With Multiple Sclerosis Disability, Matthew R Brier, Abraham Z Snyder, Aaron Tanenbaum, Richard A Rudick, Elizabeth Fisher, Stephen Jones, Joshua S Shimony, Anne H Cross, Tammie L S Benzinger, Robert T Naismith

Open Access Publications

OBJECTIVE: To enable use of clinical magnetic resonance images (MRIs) to quantify abnormalities in normal appearing (NA) white matter (WM) and gray matter (GM) in multiple sclerosis (MS) and to determine associations with MS-related disability. Identification of these abnormalities heretofore has required specialized scans not routinely available in clinical practice.

METHODS: We developed an analytic technique which normalizes image intensities based on an intensity atlas for quantification of WM and GM abnormalities in standardized MRIs obtained with clinical sequences. Gaussian mixture modeling is applied to summarize image intensity distributions from T1-weighted and 3D-FLAIR (T2-weighted) images from 5010 participants enrolled in …


Phenotype Of Peripheral Nk Cells In Latent, Active, And Meningeal Tuberculosis, José Alberto Choreño-Parra, Shabaana A. Khader, Et Al Apr 2021

Phenotype Of Peripheral Nk Cells In Latent, Active, And Meningeal Tuberculosis, José Alberto Choreño-Parra, Shabaana A. Khader, Et Al

Open Access Publications

No abstract provided.


Integrating Neuroimaging Biomarkers Into The Multicentre, High-Dose Erythropoietin For Asphyxia And Encephalopathy (Heal) Trial: Rationale, Protocol And Harmonisation, Jessica L Wisnowski, Robert C Mckinstry, Et Al Apr 2021

Integrating Neuroimaging Biomarkers Into The Multicentre, High-Dose Erythropoietin For Asphyxia And Encephalopathy (Heal) Trial: Rationale, Protocol And Harmonisation, Jessica L Wisnowski, Robert C Mckinstry, Et Al

Open Access Publications

INTRODUCTION: MRI and MR spectroscopy (MRS) provide early biomarkers of brain injury and treatment response in neonates with hypoxic-ischaemic encephalopathy). Still, there are challenges to incorporating neuroimaging biomarkers into multisite randomised controlled trials. In this paper, we provide the rationale for incorporating MRI and MRS biomarkers into the multisite, phase III high-dose erythropoietin for asphyxia and encephalopathy (HEAL) Trial, the MRI/S protocol and describe the strategies used for harmonisation across multiple MRI platforms.

METHODS AND ANALYSIS: Neonates with moderate or severe encephalopathy enrolled in the multisite HEAL trial undergo MRI and MRS between 96 and 144 hours of age using …


A Microbiota-Directed Food Intervention For Undernourished Children, Robert Y Chen, Matthew C Hibberd, Arjun S Raman, Daniel Webber, Cyrus Zhou, Vinaik Sundaresan, Kazi Ahsan, Martin F Meier, Michael J Barratt, Jeffrey I Gordon, Et Al Apr 2021

A Microbiota-Directed Food Intervention For Undernourished Children, Robert Y Chen, Matthew C Hibberd, Arjun S Raman, Daniel Webber, Cyrus Zhou, Vinaik Sundaresan, Kazi Ahsan, Martin F Meier, Michael J Barratt, Jeffrey I Gordon, Et Al

Open Access Publications

BACKGROUND: More than 30 million children worldwide have moderate acute malnutrition. Current treatments have limited effectiveness, and much remains unknown about the pathogenesis of this condition. Children with moderate acute malnutrition have perturbed development of their gut microbiota.

METHODS: In this study, we provided a microbiota-directed complementary food prototype (MDCF-2) or a ready-to-use supplementary food (RUSF) to 123 slum-dwelling Bangladeshi children with moderate acute malnutrition between the ages of 12 months and 18 months. The supplementation was given twice daily for 3 months, followed by 1 month of monitoring. We obtained weight-for-length, weight-for-age, and length-for-age z scores and mid-upper-arm circumference …


Evolution Of Genetic Networks For Human Creativity, I Zwir, C Del-Val, C R Cloninger, Et Al Apr 2021

Evolution Of Genetic Networks For Human Creativity, I Zwir, C Del-Val, C R Cloninger, Et Al

Open Access Publications

The genetic basis for the emergence of creativity in modern humans remains a mystery despite sequencing the genomes of chimpanzees and Neanderthals, our closest hominid relatives. Data-driven methods allowed us to uncover networks of genes distinguishing the three major systems of modern human personality and adaptability: emotional reactivity, self-control, and self-awareness. Now we have identified which of these genes are present in chimpanzees and Neanderthals. We replicated our findings in separate analyses of three high-coverage genomes of Neanderthals. We found that Neanderthals had nearly the same genes for emotional reactivity as chimpanzees, and they were intermediate between modern humans and …


Psychosocial Syndemics And Multimorbidity In Patients With Heart Failure, Kenneth E Freedland, Judith A Skala, Robert M Carney, Brian C Steinmeyer, Michael W Rich Apr 2021

Psychosocial Syndemics And Multimorbidity In Patients With Heart Failure, Kenneth E Freedland, Judith A Skala, Robert M Carney, Brian C Steinmeyer, Michael W Rich

Open Access Publications

Heart failure (HF) is a common cause of hospitalization and mortality in older adults. HF is almost always embedded within a larger pattern of multimorbidity, yet many studies exclude patients with complex psychiatric and medical comorbidities or cognitive impairment. This has left significant gaps in research on the problems and treatment of patients with HF. In addition, HF is only one of multiple challenges facing patients with multimorbidity, stressful socioeconomic circumstances, and psychosocial problems. The purpose of this study is to identify combinations of comorbidities and health disparities that may affect HF outcomes and require different mixtures of medical, psychological, …