Biochemistry, Biophysics, and Structural Biology Commons^™

Amorphization Of Pseudocapacitive T−Nb2O5 Accelerates Lithium Diffusivity As Revealed Using Tunable Isomorphic Architectures, Wessel Van Den Bergh, Sean Wechsler, Hasala Nadeesini Lokupitiya, Lauren Jarocha, Kwangnam Kim, James Chapman, Kyoung E. Kweon, Brandon C. Wood, Steve Heald, Morgan Stefik Phd

Faculty Publications

Intercalationpseudocapacitancecan combinecapacitor-likepower densitieswith battery-likeenergy densities.Such surface-limitedbehaviorrequiresrapid diffusionwhere amorphizationcan increasesolid-statediffusivity.Here intercalationpseudoca-pacitivematerialswith tailoredextentsof amorphizationin T-Nb2O5are first reported.Amorphizationwas characterizedwithWAXS, XPS, XAFS, and EPR which suggesteda peroxide-rich(O22) surface that was consistentwith DFT predictions.A seriesof tunableisomorphicarchitecturesenabledcomparisonswhileindependentlyvaryingtransportparameters.Throughprocessof elimination,solid-statelithium diffusionwas identifiedas thedominantdiffusive-constraintdictatingthe maximumvoltagesweep rate for surface-limitedkinetics(vSLT), termed the Surface-LimitedThreshold(SLT). ThevSLTincreasedwith amorphizationhoweverstable cycling requiredcrystallineT-Nb2O5. A current-responsemodel using series-impedanceswell-matchedtheseobservations.This perspectiverevealedthat amorphizationof T-Nb2O5enhancedsolid-statediffusionby 12.2% and increasedsurface-limitationsby 17.0% (stablesamples).This approachenabledretaining95% lithiationcapacityat ~800mVs1(1,600C-rate equivalent).

Adrenergic Modulation Of Precursor Cells Of Ovarian Cancer, Sweta Dash

USF Tampa Graduate Theses and Dissertations

Ovarian cancer remains one of the most lethal gynecological cancer and ranks eighth in cancer-related mortality among women. The high mortality rate can be attributed to majority of the cases being diagnosed at advanced stages of the disease when the survival rate and overall prognosis are poor. There is lack of effective screening modalities to detect ovarian cancer at early stages. Hence, a better understanding of the molecular mechanisms leading to ovarian cancer initiation is required.

Epidemiological studies have reported that conditions which cause chronic behavioral stress are associated with a higher risk of developing ovarian cancer. The activation of …

Syndecan-2 Regulates Pad2 To Exert Antifibrotic Effects On Ra-Ild Fibroblasts, Konstantin Tsoyi, Anthony J Esposito, Bo Sun, Ryan G Bowen, Kevin Xiong, Fernando Poli, Rafael Cardenas, Sarah G Chu, Xiaoliang Liang, Stefan W Ryter, Christine Beeton, Tracy J Doyle, Matthew J Robertson, Lindsay J Celada, Freddy Romero, Souheil Y El-Chemaly, Mark A Perrella, I-Cheng Ho, Ivan O Rosas

Faculty, Staff and Students Publications

Rheumatoid arthritis (RA)-associated interstitial lung disease (RA-ILD) is the most common pulmonary complication of RA, increasing morbidity and mortality. Anti-citrullinated protein antibodies have been associated with the development and progression of both RA and fibrotic lung disease; however, the role of protein citrullination in RA-ILD remains unclear. Here, we demonstrate that the expression of peptidylarginine deiminase 2 (PAD2), an enzyme that catalyzes protein citrullination, is increased in lung homogenates from subjects with RA-ILD and their lung fibroblasts. Chemical inhibition or genetic knockdown of PAD2 in RA-ILD fibroblasts attenuated their activation, marked by decreased myofibroblast differentiation, gel contraction, and extracellular matrix …

Role Of Specialized Pro-Resolving Mediators In Reducing Neuroinflammation In Neurodegenerative Disorders, Jana Ponce, Arzu Ulu, Corrine Hanson, Erin Cameron-Smith, Jenna Wuebker, John Bertoni, Alfred Fisher, Ka-Chun Siu, Vivien Marmelat, Jiri Adamec, Danish Bhatti

Department of Biochemistry: Faculty Publications

Alzheimer’s disease (AD) and Parkinson’s disease (PD) are neurodegenerative disorders that affect millions of individuals worldwide. As incidence of these conditions increases with age, there will undoubtedly be an increased prevalence of cases in the near future. Neuroinflammation is a hallmark in the development and progression of neurodegenerative diseases and prevention or resolution of chronic neuroinflammation may represent a novel approach to treatment. The present review highlights the potential of the anti-inflammatory and pro-resolving effects of polyunsaturated fatty acid (PUFA)- derived mediators (Specialized Pro-resolving Mediators—SPM) in neurodegenerative disorders. PUFA-derived SPM are biosynthesized in response to chemicals produced from acute inflammatory …

Allosteric Determinants Of The Sars-Cov-2 Spike Protein Binding With Nanobodies: Examining Mechanisms Of Mutational Escape And Sensitivity Of The Omicron Variant, Gennady M. Verkhivker

Mathematics, Physics, and Computer Science Faculty Articles and Research

Structural and biochemical studies have recently revealed a range of rationally engineered nanobodies with efficient neutralizing capacity against the SARS-CoV-2 virus and resilience against mutational escape. In this study, we performed a comprehensive computational analysis of the SARS-CoV-2 spike trimer complexes with single nanobodies Nb6, VHH E, and complex with VHH E/VHH V nanobody combination. We combined coarse-grained and all-atom molecular simulations and collective dynamics analysis with binding free energy scanning, perturbation-response scanning, and network centrality analysis to examine mechanisms of nanobody-induced allosteric modulation and cooperativity in the SARS-CoV-2 spike trimer complexes with these nanobodies. By quantifying energetic and allosteric …

Escherichia Coli Alanyl-Trna Synthetase Maintains Proofreading Activity And Translational Accuracy Under Oxidative Stress, Arundhati Kavoor, Paul Kelly, Michael Ibba

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Aminoacyl-tRNA synthetases (aaRSs) are enzymes that synthesize aminoacyl-tRNAs to facilitate translation of the genetic code. Quality control by aaRS proofreading and other mechanisms maintains translational accuracy, which promotes cellular viability. Systematic disruption of proofreading, as recently demonstrated for alanyl-tRNA synthetase (AlaRS), leads to dysregulation of the proteome and reduced viability. Recent studies showed that environmental challenges such as exposure to reactive oxygen species can also alter aaRS synthetic and proofreading functions, prompting us to investigate if oxidation might positively or negatively affect AlaRS activity. We found that while oxidation leads to modification of several residues in Escherichia coli AlaRS, unlike …

Reversible Lysine Fatty Acylation Of An Anchoring Protein Mediates Adipocyte Adrenergic Signaling., Rushita A Bagchi, Emma L Robinson, Tianjing Hu, Ji Cao, Jun Young Hong, Charles A Tharp, Hanan Qasim, Kathleen M Gavin, Julie Pires Da Silva, Jennifer L Major, Bradley K Mcconnell, Edward Seto, Hening Lin, Timothy A Mckinsey

Biochemistry and Molecular Medicine Faculty Publications

No abstract provided.

Long-Read Sequencing Of The Zebrafish Genome Reorganizes Genomic Architecture, Yelena Chernyavskaya, Xiaofei Zhang, Jinze Liu, Jessica S. Blackburn

Molecular and Cellular Biochemistry Faculty Publications

BACKGROUND: Nanopore sequencing technology has revolutionized the field of genome biology with its ability to generate extra-long reads that can resolve regions of the genome that were previously inaccessible to short-read sequencing platforms. Over 50% of the zebrafish genome consists of difficult to map, highly repetitive, low complexity elements that pose inherent problems for short-read sequencers and assemblers.

RESULTS: We used long-read nanopore sequencing to generate a de novo assembly of the zebrafish genome and compared our assembly to the current reference genome, GRCz11. The new assembly identified 1697 novel insertions and deletions over one kilobase in length and placed …

Investigation Of The Methylome Pattern Changes In Phytophthora Sojae Infected Soybean (Glycine Max), Shyaron Poudel

Student Theses and Dissertations

Phytophthora stem and root rot (PSR), a soybean disease causes annual losses of up to $250 million in the United States alone. Using the Rps (resistant to Phytophthora sojae) gene in soybean is the main management technique. However, Rps genes are only effective until 8-15 years in the field. Therefore, further understanding of the Rps gene regulation and immune response in soybean is desperately needed. In this study, first, three commercial DNA methylation detection kits were examined on soybean (cultivar Williams 82,which carries Rps1k) DNA samples. All three kits provided libraries with excellent quality and coverage. Secondly, the differential DNA …

Unraveling The Anti-Inflammatory And Cardioprotective Mechanism Of Prenylated Stilbenoids From Peanut Hairy Root Cultures In Vitro And In Vivo, Md Rokib Hasan

Student Theses and Dissertations

Stilbenoids are a non-flavonoid class of polyphenols that are important for their potential medicinal applications. Resveratrol, ione of the most well-studied compounds of this group, has various medicinal properties including anti-inflammatory, antioxidant, anti-cancer and many other properties. Prenylated stilbenoids which include arachidin-1 and arachidin-3 are produced as a defense response to biotic and abiotic stresses in peanut (Arachis hypogaea). Prenylation has been shown to enhance the biological activities of polyphenolic compounds and thus arachidins may have higher anti-inflammatory activity than resveratrol in addition to many other potential health applications. However, the molecular mechanism of the arachidins as an anti-inflammatory and …

Prostacyclin Promotes Degenerative Pathology In A Model Of Alzheimer’S Disease, Tasha R. Womack, Craig T. Vollert, Odochi Ohia-Nwoko, Monika Schmitt, Saghi Montazari, Tina L. Beckett, David Mayerich, M. Paul Murphy, Jason L. Eriksen

Molecular and Cellular Biochemistry Faculty Publications

Alzheimer’s disease (AD) is a progressive neurodegenerative disorder that is the most common form of dementia in aged populations. A substantial amount of data demonstrates that chronic neuroinflammation can accelerate neurodegenerative pathologies. In AD, chronic neuroinflammation results in the upregulation of cyclooxygenase and increased production of prostaglandin H2, a precursor for many vasoactive prostanoids. While it is well-established that many prostaglandins can modulate the progression of neurodegenerative disorders, the role of prostacyclin (PGI2) in the brain is poorly understood. We have conducted studies to assess the effect of elevated prostacyclin biosynthesis in a mouse model of AD. Upregulated prostacyclin expression …

Test-Driving The Next Generation Of Crispr Gene Editing, Olivia Gornichec, Kailey Mayer

Research on Capitol Hill

USU team Kailey, recent graduate of animal science, and Olivia, senior in biochemistry, have led and funded this project through a student grant. CRISPR has been making waves in the scientific community for its potential to help us edit genomes. However, that is just one of the known types of CRISPR, and other types aren’t in forms that are accessible to study. Kailey and Olivia have successfully cloned Type IV-B into a plasmid that can now be used to perform further research into what this system does. The two students never expected that, as undergrads, they would make a foundation-level …

Retinal Horizontal Cells Use Different Synaptic Sites For Global Feedforward And Local Feedback Signaling, Christian Behrens, Shubhash Chandra Yadav, Maria M Korympidou, Yue Zhang, Silke Haverkamp, Stephan Irsen, Anna Schaedler, Xiaoyu Lu, Zhuohe Liu, Jan Lause, François St-Pierre, Katrin Franke, Anna Vlasits, Karin Dedek, Robert G Smith, Thomas Euler, Philipp Berens, Timm Schubert

Faculty, Staff and Students Publications

In the outer plexiform layer (OPL) of the mammalian retina, cone photoreceptors (cones) provide input to more than a dozen types of cone bipolar cells (CBCs). In the mouse, this transmission is modulated by a single horizontal cell (HC) type. HCs perform global signaling within their laterally coupled network but also provide local, cone-specific feedback. However, it is unknown how HCs provide local feedback to cones at the same time as global forward signaling to CBCs and where the underlying synapses are located. To assess how HCs simultaneously perform different modes of signaling, we reconstructed the dendritic trees of five …

Inhibition Of Biotin Carboxylase By Three Antibacterial Compounds, Matt Craft

LSU Doctoral Dissertations

The rise of antibacterial resistant bacteria is a major problem in the United States of America and around the world. Millions of patients are infected with antimicrobial resistant bacteria each year. Novel antibacterial agents are needed to combat the growing and present crisis. Acetyl-CoA carboxylase (ACC), the multi-subunit complex which catalyses the first committed step in fatty acid synthesis, is a validated target for antibacterial agents. However, there are at present, no commercially available antibiotics that target ACC. Ethyl 4-[[2-chloro-5-(phenylcarbamoyl)phenyl]sulfonylamino]benzoate (SABA1) is a compound that has been shown to have antibacterial properties against Pseudomonas aeruginosa and Escherichia coli. SABA1 inhibits …

Imaging-Based Screening Of Deubiquitinating Proteases Identifies Otubain-1 As A Stabilizer Of C-Myc, Shannon E Moree, Laure Maneix, Polina Iakova, Fabio Stossi, Ergun Sahin, Andre Catic

Faculty, Staff and Students Publications

The ubiquitin-proteasome pathway precisely controls the turnover of transcription factors in the nucleus, playing an important role in maintaining appropriate quantities of these regulatory proteins. The transcription factor c-MYC is essential for normal development and is a critical cancer driver. Despite being highly expressed in several tissues and malignancies, the c-MYC protein is also continuously targeted by the ubiquitin-proteasome pathway, which can either facilitate or inhibit c-MYC degradation. Deubiquitinating proteases can remove ubiquitin chains from target proteins and rescue them from proteasomal digestion. This study sought to determine novel elements of the ubiquitin-proteasome pathway that regulate c-MYC levels. We performed …

Understanding The Impact Of Fat10 Overexpression On Liver Metabolism, Sharifa Love-Rutledge, Lauren Richardson

Summer Community of Scholars (RCEU and HCR) Project Proposals

No abstract provided.

Ppld Is A De-N-Acetylase Of The Cell Wall Linkage Unit Of Streptococcal Rhamnopolysaccharides, Jeffrey S. Rush, Prakash Parajuli, Alessandro Ruda, Jian Li, Amol Arunrao Pohane, Svetlana Zamakhaeva, Mohammad M. Rahman, Jennifer C. Chang, Artemis Gogos, Cameron W. Kenner, Gérard Lambeau, Michael J. Federle, Konstantin V. Korotkov, Göran Widmalm, Natalia Korotkova

Molecular and Cellular Biochemistry Faculty Publications

The cell wall of the human bacterial pathogen Group A Streptococcus (GAS) consists of peptidoglycan decorated with the Lancefield group A carbohydrate (GAC). GAC is a promising target for the development of GAS vaccines. In this study, employing chemical, compositional, and NMR methods, we show that GAC is attached to peptidoglycan via glucosamine 1-phosphate. This structural feature makes the GAC-peptidoglycan linkage highly sensitive to cleavage by nitrous acid and resistant to mild acid conditions. Using this characteristic of the GAS cell wall, we identify PplD as a protein required for deacetylation of linkage N-acetylglucosamine (GlcNAc). X-ray structural analysis indicates …

College Of Natural Sciences Newsletter, February 2022, College Of Natural Sciences

College of Natural Sciences Newsletters and Reports

Volume 3, Issue 2

Page 1 Dean's Message
Page 2 Awards & Recognition
Page 3-4 Media Coverage of CNS
Page 5- 6 Local Boy Scouts Earn Their Chemistry Merit Badges
Page 7-8 Mount Vernon Teacher Wins 2022 South Dakota Outstanding Physical Science Teacher Award
Page 9 Middle Schoolers Visit SDSU
Page 10 Microbiology Club Tours POET
Page 11 53rd Geography Convention
Page 12 Open PRAIRIE Data

Docking And Molecular Dynamic Of Microalgae Compounds As Potential Inhibitors Of Beta-Lactamase, Roberto Pestana-Nobles, Yani Aranguren-Diaz, Elwi Machado-Sierra, Juvenal Yosa, Nataly J. Galan-Freyle,, Laura X. Sepulveda-Montano, Daniel G. Kuroda, Leonardo C. Pacheco-Londono

Faculty Publications

Bacterial resistance is responsible for a wide variety of health problems, both in children and adults. The persistence of symptoms and infections are mainly treated with beta-lactam antibiotics. The increasing resistance to those antibiotics by bacterial pathogens generated the emergence of extended-spectrum beta-lactamases (ESBLs), an actual public health problem. This is due to rapid mutations of bacteria when exposed to antibiotics. In this case, beta-lactamases are enzymes used by bacteria to hydrolyze the beta-lactam rings present in the antibiotics. Therefore, it was necessary to explore novel molecules as potential beta-lactamases inhibitors to find antibacterial compounds against infection caused by ESBLs. …

Whole-Genome Sequencing And Rna-Seq Reveal Differences In Genetic Mechanism For Flowering Response Between Weedy Rice And Cultivated Rice, Richard S. Garcia, Sapphire Coronejo, Jonathan Concepcion, Prasanta K. Subudhi

Faculty Publications

Flowering is a key agronomic trait that influences adaptation and productivity. Previous studies have indicated the genetic complexity associated with the flowering response in a photoinsensitive weedy rice accession PSRR-1 despite the presence of a photosensitive allele of a key flowering gene Hd1. In this study, we used whole-genome and RNA sequencing data from both cultivated and weedy rice to add further insights. The de novo assembly of unaligned sequences predicted 225 genes, in which 45 were specific to PSRR-1, including two genes associated with flowering. Comparison of the variants in PSRR-1 with the 3K rice genome (RG) dataset identified …

In Vitro Toxicological Evaluation Of Mesoporous Silica Microparticles Functionalised 1 With Carvacrol And Thymol, Cristina Fuentes, Ana Fuentes, Hugh Byrne, José Barat, María José Ruiz

Articles

The cytotoxicity of carvacrol- and thymol- functionalised mesoporous silica microparticles (MCM-41) was assessed in the human hepatocarcinoma cell line (HepG2). Cell viability, lactate dehydrogenase (LDH) activity, reactive oxygen species (ROS) production, mitochondrial membrane potential (ΔΨm), lipid peroxidation (LPO) and apoptosis/necrosis analysis were used as endpoints. Results showed that both materials induced cytotoxicity in a time and concentration-dependent manner, being more cytotoxic than free essential oil components and bare MCM-41. This effect was caused by the cell-particle interactions and not from degradation products released to the culture media, as demonstrated in the extract dilution assays. LDH release was seen to be …

Eukaryotic Initiation Factor 3 Interactions With Structural Elements Of Barley Yellow Dwarf Virus Untranslated Regions Reveal Details Of A New Cap-Independent Translation Initiation Model, Paul S. Powell

Dissertations, Theses, and Capstone Projects

Barley Yellow Dwarf Virus (BYDV) is a positive strand RNA plant virus that translates without using a 5′ 7-methylguanosine cap or a 3′ poly-adenosine tail, features that are required for canonical mRNA translation. BYDV’s non-canonical translation relies on RNA structures in the 5′ and 3′ untranslated regions (UTRs) to recruit eukaryotic initiation factors (eIFs) and ribosomes. BYDV’s 3′ translation enhancer (BTE) is a cruciform structure capable of recruiting the cap-binding complex eIF4F, the large scaffolding complex eIF3, and the 40S ribosomal subunit. Together eIF3, eIF4F, and BTE influence factor binding and 40S recruitment on the 5′ UTR and play a …

Scientific Development Of An Integrated Workflow For Latent Print, Questioned Document, And Dna Processing Of Paper Evidence, Ashley Morgan

Dissertations, Theses, and Capstone Projects

Touch paper evidence could be the source of probative human DNA but recovery is challenging and forensic laboratories instead prioritize processing by the Latent Print and Questioned Document disciplines. Recent advances in DNA collection methods and the increased sensitivity of STR typing kits have improved success rates for DNA testing of paper evidence; but prior to implementing DNA collection, laboratories have to decide in which order to examine paper for the different types of forensic evidence. This thesis developed and tested a multi-discipline workflow for processing paper evidence by DNA, Latent Prints and Questioned Documents experts. Preliminary sampling studies indicated …

Structural And Biochemical Investigations Of The Initiation Of Dna Replication In Bacteriophage Lambda And Escherichia Coli, Jillian D. Chase

Dissertations, Theses, and Capstone Projects

Faithful transmission of genetic information is requisite for the propagation of all life. DNA replication in each of the three domains of life requires the separation of double stranded DNA (dsDNA) into single stranded DNA (ssDNA) which then serves as a template for genomic duplication of each original DNA strand. Initiation of replication events occurs by tightly regulated processes during which specialized proteins are loaded at a specific locus within the genome, termed the origin of replication, in preparation of bidirectional replication events. A replicative helicase must be loaded or assembled on both strands of DNA at the origin to …

Paddling Along The Voltage Gated Sodium Channel Galaxy With Sea Anemone Toxins: Structural Studies Of The Interaction Between The Paddle Motif From Nav1.5div And Sea Anemone Toxin, Adel K. Hussein

Dissertations, Theses, and Capstone Projects

Voltage gated sodium channels (VGSC) are membrane proteins that serve an important function in the central nervous system (CNS), peripheral nervous system (PNS), and cardiac muscles amongst others. The main function of VGSC is in the propagation of electrical signals by depolarizing excitable cells. Nine mammalian VGSC subtypes have been characterized, Na_V1.1 – Na_V1.9, that are expressed in a tissue specific manner, each with unique gating properties. Numerous diseases have been linked to defects in VGSC including epilepsy, mental retardation, long QT syndrome, and Brugada disease. Furthermore, these channels are one of the primary targets of …

Water-Based Lead Generation, Brian Olson

Dissertations, Theses, and Capstone Projects

Water-based Lead Generation. The opioid epidemic and the SARS-CoV-2 pandemic are current serious challenges whose devastating effects could be assuaged through the development of new drugs. Opioids that are functional painkillers, that are less likely to cause overdose, and small molecule drugs that could inhibit the life cycle of SARS-CoV-2 would be useful. The work herein investigated the use of water molecules for lead generation in drug development against opioid receptors and SARS-CoV-2 viral proteins. In opioid receptor binding sites, purported bridging waters were obtained from crystal waters or from molecular dynamics simulations, as Hydration Site Analysis was used to …

An In Silico Approach To Investigate The Structural And Biochemical Basis Of The Rna Binding Functions Of Nucleolin, Avdar San

Dissertations, Theses, and Capstone Projects

Nucleolin (NCL) is a stress responsive multifunctional nucleolar protein and accounts for 10% of the total nucleolar protein content. NCL belongs to the class of RNA binding proteins (RBPs) that regulate many important cellular processes through their interactions with different RNA molecules. The dysregulation of RBPs and the RNA metabolism pathways they intersect is a known driver of tumorigenesis. NCL regulates ribosome biogenesis, chromatin remodeling, microRNA processing, and gene expression on multiple levels. The RNA-protein interactions of NCL are primarily driven by its four RNA binding domains (RBDs). NCL is known to interact with a growing list of primary-miRNA (pri-miRNA) …

Two Heads Are Better Than One: Current Landscape Of Integrating Qsp And Machine Learning, Tongli Zhang, Ioannis P. Androulakis, Peter Bonate, Limei Cheng, Tomáš Helikar, Jaimit Parikh, Christopher Rackauckas, Kalyanasundaram Subramanian, Carolyn R. Cho

Department of Biochemistry: Faculty Publications

Quantitative systems pharmacology (QSP) modeling is applied to address essential questions in drug development, such as the mechanism of action of a therapeutic agent and the progression of disease. Meanwhile, machine learning (ML) approaches also contribute to answering these questions via the analysis of multi-layer ‘omics’ data such as gene expression, proteomics, metabolomics, and high-throughput imaging. Furthermore, ML approaches can also be applied to aspects of QSP modeling. Both approaches are powerful tools and there is considerable interest in integrating QSP modeling and ML. So far, a few successful implementations have been carried out from which we have learned about …

Randomized Phase Iii Bmt Ctn Trial Of Calcineurin Inhibitor-Free Chronic Graft-Versus-Host Disease Interventions In Myeloablative Hematopoietic Cell Transplantation For Hematologic Malignancies, Leo Luznik, Marcelo C Pasquini, Brent Logan, Robert J Soiffer, Juan Wu, Steven M Devine, Nancy Geller, Sergio Giralt, Helen E Heslop, Mary M Horowitz, Richard J Jones, Mark R Litzow, Adam Mendizabal, Lori Muffly, Eneida R Nemecek, Lynn O'Donnell, Richard J O'Reilly, Raquel Palencia, Johannes Schetelig, Leyla Shune, Scott R Solomon, Sumithira Vasu, Vincent T Ho, Miguel-Angel Perales

Faculty, Staff and Students Publications

PURPOSE: Calcineurin inhibitors (CNI) are standard components of graft-versus-host disease (GVHD) prophylaxis after hematopoietic cell transplantation (HCT). Prior data suggested that CNI-free approaches using donor T-cell depletion, either by ex vivo CD34 selection or in vivo post-transplant cyclophosphamide (PTCy) as a single agent, are associated with lower rates of chronic GVHD (cGVHD).

METHODS: This multicenter phase III trial randomly assigned patients with acute leukemia or myelodysplasia and an HLA-matched donor to receive CD34-selected peripheral blood stem cell, PTCy after a bone marrow (BM) graft, or tacrolimus and methotrexate after BM graft (control). The primary end point was cGVHD (moderate or …

Race/Ethnicity And Birthplace As Risk Factors For Gastric Intestinal Metaplasia In A Multiethnic United States Population, Mimi C Tan, Taher Jamali, Theresa H Nguyen, Amy Galvan, Robert J Sealock, Anam Khan, Neda Zarrin-Khameh, Ashley Holloman, Ourania Kampagianni, David Henriquez Ticas, Yan Liu, Hashem B El-Serag, Aaron P Thrift

Faculty, Staff and Students Publications

INTRODUCTION: Several US subgroups have increased risk of gastric cancer and gastric intestinal metaplasia (GIM) and may benefit from targeted screening. We evaluated demographic and clinical risk factors for GIM and examined the interaction between race/ethnicity and birthplace on GIM risk.

METHODS: We identified patients who had undergone esophagogastroduodenoscopy with gastric biopsy from 3/2006-11/2016 using the pathology database at a safety net hospital in Houston, Texas. Cases had GIM on ≥1 gastric biopsy histopathology, whereas controls lacked GIM on any biopsy. We estimated odds ratios and 95% confidence intervals (CI) for associations with GIM risk using logistic regression and developed …