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Age-Dependent Brain Responses To Mechanical Stress Determine Resilience In A Chronic Lymphatic Drainage Impairment Model, Zachary Gursky, Zohaib Nisar Khan, Sunil Koundal, Ankita Bhardwaj, Joaquin Caceres Melgarejo, Kaiming Xu, Xinan Chen, Hung-Mo Lin, Xianfeng Gu, Hedok Lee, Jonathan Kipnis, Yoav Dori, Allen Tannenbaum, Laura Santambrogio, Helene Benveniste

2020-Current year OA Pubs

The outflow of 'dirty' brain fluids from the glymphatic system drains via the meningeal lymphatic vessels to the lymph nodes in the neck, primarily the deep cervical lymph nodes (dcLN). However, it is unclear whether dcLN drainage is essential for normal cerebral homeostasis. Using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and computational fluid dynamics, we studied the impact of long-term mechanical stress from compromised dcLN drainage on brain solute and fluid outflow in anesthetized rats. We found that in young, but not middle-aged, rats, impairment of dcLN drainage was linked to moderately increased intracranial pressure and the emergence of extracranial …

Learning In Virtual Environments With Varying Levels Of Sensory Information, Maryam Derayati Far

Psychology Theses and Dissertations

The sensory environment plays a critical role in shaping learners’ attention, engagement, and retention. This thesis investigates how varying levels of sensory input in virtual reality (VR) classrooms influence learning for two age groups—children and young adults—and explores how individual differences in sensory processing moderate these effects. Using immersive VR technology to simulate classroom settings, two experimental studies were conducted. Study One involved 60 children aged 6–15 years, recruited primarily through a university-run summer camp. Study Two included 57 undergraduate students aged 18–36 years, recruited through a research participation pool. In both studies, participants were randomly assigned to either a …

Compelled Contraception, Lars Noah

West Virginia Law Review

Can the federal government insist that people use contraceptives? It may come as a surprise to learn that the U.S. Food and Drug Administration (FDA) has done just that as a condition for allowing access to some pharmaceutical products that create a serious risk of birth defects. Over the last few decades, the agency has demanded that patients using certain teratogenic agents—now numbering over a dozen drugs prescribed for a variety of conditions, ranging from severe acne and psoriasis to multiple myeloma and pulmonary hypertension—agree to avoid becoming pregnant, sometimes for years after completing their course of treatment. Undoubtedly the …

Himmelfarb Headlines - September/October 2025, The George Washington University, Himmelfarb Health Sciences Library

Himmelfarb Headlines (2009 - present)

News, information, and resources relating to Himmelfarb Library that is of interest to patrons.

Development Of A School Nurse Simulation Boot Camp, Jodi S. Bullard, Angela Preston, Jenifer Chilton

Nursing Faculty Publications and Presentations

A school nurse continuing education program was developed by School of Nursing faculty at an East Texas university, providing school nurses with documented competence in nursing skills focused on equitable health outcomes. The 8 hr School Nurse Boot Camp program consisted of a keynote address on local pediatric health topics and a series of 30-min speed simulations focused on mental and physical health issues. A total of 62 school nurses attended the three boot camp offerings during the 2023/2024 academic school year and represented a student population of 78,275. Participants indicated satisfaction with the event and interest in future continuing …

Ontology Accelerates Few-Shot Learning Capability Of Large Language Model: A Study In Extraction Of Drug Efficacy In A Rare Pediatric Epilepsy, Pedram Golnari, Katrina Prantzalos, Veronica Hood, Mary Anne Meskis, Lori L Isom, Karen Wilcox, Jack M Parent, Dennis Lal, Samden D Lhatoo, Howard P Goodkin, Elaine C Wirrell, Kelly G Knupp, Manisha Patel, Jeffrey A Loeb, Joseph E Sullivan, Lauren Harte-Hargrove, Brandy E Fureman, Jeffrey Buchhalter, Satya S Sahoo

Faculty, Staff and Student Publications

OBJECTIVE: Dravet Syndrome (DS) is a developmental and epileptic encephalopathy that is characterized by severe, prolonged motor seizures and high resistance to multiple antiseizure medications (ASMs) with multiple comorbidities. Evaluating the efficacy of new drugs in DS preclinical models and mapping them to human phenotypes of DS through analysis of published literature is an important goal for improving outcomes in this rare pediatric epilepsy.

MATERIALS AND METHODS: Large language models (LLM) have demonstrated great promise in parsing published literature; however, the performance of LLMs falls short in medical applications. In this study, we investigate the effectiveness of domain ontology developed …

A Pestel-Swot Matrix Analysis Of Sustainable Aquafeed Sector: A Case Of Kenya's Fish Feed Sector, Esther Magondu, Lucy Njogu, Kevin Ouko, Jimmy B. Mboya, Mavindu Muthoka, Rodrigue Yossa, Jonathan Munguti, Mary A. Opiyo, Menaga Meenakshisundaram, Chrysantus M. Tanga, Kevin Obiero

All Peer-Reviewed Publications

Global demand for seafood continues to rise, positioning aquaculture as a critical pathway for improving food security, nutrition, and rural livelihoods. In Kenya, the aquaculture sector remains constrained by structural challenges, with fish feed accounting for 60%–70% of production costs and limiting sectoral growth, particularly for smallholder farmers. This review critically analyzes Kenya's fish feed sector through an integrated PESTEL-SWOT framework, drawing on a scoping review of academic literature, policy reports, and sector development studies. The paper highlights key macro-level drivers, including fragmented policy implementation, dependency on imported ingredients, and climate-related risks, and connects these with internal industry dynamics such …

Nanoparticle Iron Based Catalysts For Clean Water And Other Applications, Shelby Lynn Foster

Graduate Theses and Dissertations

This dissertation explores the development, characterization, and application of iron-based catalysts for environmental remediation and energy generation. The research focuses on Fe-based nanomaterials for water purification, electrochemical ammonia production, and ethanol oxidation enhancement. The first section of the dissertation investigates the removal of water contaminants using nickel-iron (NiFe) bimetallic nanoparticles. Various NiFe ratios were synthesized and tested for their efficiency in degrading the azo dye (Orange G), with lower Ni content formulations achieving 80–99% dye removal within 60 minutes. Results show that changing the molar ratio of nickel to iron caused different removal rates, as well as the extent of …

Assessment Of Microbial Quality And Safety, Including Aflatoxin B1, In Buckwheat Flour And Groats, La Fontaine Bahatsi

Department of Food Science and Technology: Dissertations, Theses, and Student Research

Buckwheat (Fagopyrum esculentum), a gluten-free pseudocereal, has gained popularity in global food markets for its nutritional value and functional properties. However, despite its health-promoting potential, buckwheat is vulnerable to microbial contamination and mycotoxin accumulation during cultivation, processing, and storage. These factors present significant food safety concerns that remain understudied, particularly in North America.

This study investigated the microbiological quality and mycotoxin contamination of buckwheat flour and groats collected from different suppliers via online sourcing. Samples were collected in two consecutive years (2024-2025). Microbiological quality, including aerobic plate counts (APC), Enterobacteriaceae, coliforms, E. coli, yeasts, and molds, was evaluated …

Zika Virus Impairs Autophagic Flux In Trabecular Meshwork, And Inhibition Of Autophagy Restricts Ocular Viral Transmission And Associated Pathology, Faraz Ahmad, Prince Kumar, Pallav Singh, Trupti Joshi, Pawan Kumar Singh

Biomedical Sciences

Zika virus (ZIKV) is the lone member of Flavivirus family known to cause congenital glaucoma following in utero exposure. The molecular mechanisms of ZIKV-induced glaucoma remain elusive, with no known therapeutic modalities. Autophagy plays a dual role in viral infections and glaucoma pathogenesis. However, how ZIKV  interferes with autophagic pathways in the trabecular meshwork (TM) and whether autophagy contributes to ZIKV-induced ocular complications remains elusive. Here, we investigated the role of autophagy in ZIKV ocular pathogenesis utilizing a primary human trabecular meshwork cells (HTMC) and IFNAR1-/- mouse model of ocular infection. Our results show that ZIKV permissively infects HTMC, elicits …

Docking Investigation Of Thevetia Peruviana Plant Compounds For Targeting Molluscicidal Activity Against Biomphalaria Alexandrina Snails, The Intermediate Host Of Schistosoma Mansoni, Samah I. Ghoname, Basma H. Amin, Asmaa T. Mohamed, Olfat A. Olfat A. Hammam, Hebat‑Allah A. Dokmak

Nanotechnology Research Centre

Background Thevetia peruviana, commonly known as Yellow Oleander or Cabbage Tree, is a tropical shrub. Extracts from various parts of the plant (e.g., leaves, seeds) have demonstrated pesticidal properties, including the ability to repel or kill intermediate hosts of Schistosomiasis. Methods This study employed gas chromatography–mass spectrometry (GC–MS) analysis to identify 33 compo nents in the ethanol extract, with key compounds exhibiting antioxidant, anti‑inflammatory, anticancer, and anti microbial properties. Additionally, the research investigated the molluscicidal activity of the plant extract, its impact on Caspase‑3 expression, steroid sex hormone levels in Biomphalaria alexandrina, and histological alterations in the digestive and hermaphrodite …

The Role Of Liver Macrophages In Viral Liver Pathogenesis, Alexis Brantly, Kyle Yeakle, Michael J. Bouchard, Peter J. Gaskill, Michael R. Nonnemacher

Kimmel Cancer Center Faculty Papers

Liver macrophages play important roles in the pathophysiology of liver fibrosis and hepatocellular carcinoma. However, liver macrophages are a heterogenous population and have differing roles in maintenance of liver function and response in disease. In a healthy liver, macrophages play a critical role in antigen processing, maintaining tolerance to the high levels of gut-derived bacterial products, and regulating inflammation through cytokine response. However, macrophages also play a critical role in liver pathology, specifically in the context of viral infection. The liver is targeted by multiple viruses, including human immunodeficiency virus, hepatitis B virus, and hepatitis C virus, which dysregulate macrophage …

Folliculin Deletion In The Mouse Kidney Results In Cystogenesis Of The Loops Of Henle Via Aberrant Tfeb Activation, Ola Shalaby, Tomoko Ohmori, Koichiro Miike, Shunsuke Tanigawa, Luh Ade Wilan Krisna, Alessia Calcagnì, Andrea Ballabio, Yoshiaki Kubota, Laura S Schmidt, W Marston Linehan, Takaaki Ito, Masaya Baba, Ryuichi Nishinakamura

Duncan NRI Faculty and Staff Publications

The mammalian kidney contains numerous nephrons connected to the collecting ducts, and each nephron consists of a glomerulus, a proximal tubule, the loop of Henle (LoH), and a distal tubule. Folliculin (FLCN) is a causative gene for Birt-Hogg-Dubé syndrome, which is characterized by a variety of manifestations, including renal cysts and cancer. Although deletion of Flcn in the mouse collecting duct and distal nephron leads to cyst formation, its precise role in the entire nephron remains unclear. Herein, nephron-specific Flcn knockout mice exhibited cystogenesis along the entire nephron segments, most prominent in the LoH, preceded by an irregularly shaped lumen …

Coenzyme Q Headgroup Intermediates Can Ameliorate A Mitochondrial Encephalopathy, Guangbin Shi, Claire Miller, Sota Kuno, Alejandro G Rey Hipolito, Salsabiel El Nagar, Giulietta M Riboldi, Megan Korn, Wyatt C Tran, Zixuan Wang, Lia Ficaro, Tao Lin, Quentin Spillier, Begoña Gamallo-Lana, Drew R Jones, Matija Snuderl, Soomin C Song, Adam C Mar, Alexandra L Joyner, Roy V Sillitoe, Robert S Banh, Michael E Pacold

Duncan NRI Faculty and Staff Publications

Decreased brain levels of coenzyme Q10 (CoQ10), an endogenously synthesized lipophilic antioxidant1,2, underpin encephalopathy in primary CoQ10 deficiencies3,4 and are associated with common neurodegenerative diseases and the ageing process5,6. CoQ10 supplementation does not increase CoQ10 pools in the brain or in other tissues. The recent discovery of the mammalian CoQ10 headgroup synthesis pathway, in which 4-hydroxyphenylpyruvate dioxygenase-like protein (HPDL) makes 4-hydroxymandelate (4-HMA) to synthesize the CoQ10 headgroup precursor 4-hydroxybenzoate (4-HB)7, offers an opportunity to pharmacologically restore CoQ10 synthesis and mechanistically treat CoQ10 deficiencies. To test whether 4-HMA …

The Effect Of Tert Promoter Mutation On Predicting Meningioma Outcomes: A Multi-Institutional Cohort Analysis, Karenna J Groff, Ruchit V Patel, Yang Feng, Hia S Ghosh, Miguel A Millares Chavez, Joseph O'Brien, William C Chen, Vijay Nitturi, Akshay V Save, Mark W Youngblood, Craig M Horbinski, James P Chandler, Felix Ehret, Chloe Gui, Justin Z Wang, Kristen Park, Sonia Ajmera, Marc Rosenblum, Abigail K Suwala, Catena Kresbach, Christopher W Mount, Ulrich Schüller, Sandro Santagata, Felix Sahm, Tejus A Bale, Christina Jackson, Timothy E Richardson, Chunyu Cai, Farshad Nassiri, Gelareh Zadeh, David Kaul, David Capper, Stephen T Magill, John G Golfinos, Chandra Sen, Akash J Patel, David R Raleigh, Jennifer Moliterno, Donato Pacione, Matija Snuderl, Wenya Linda Bi

Duncan NRI Faculty and Staff Publications

Background: Molecular aberrations have been incorporated into tumour classification guidelines of meningioma. TERT-promoter (TERTp) mutation is associated with worse prognosis and is designated a WHO grade 3 biomarker. However, it remains unclear whether TERTp mutation is context-dependent, with other co-occurring genetic alterations potentially driving its association with prognosis. We sought to characterise the role of TERTp mutation in meningioma and guide TERTp sequencing.

Methods: We identified 1492 patients of all ages who had previously received surgery for meningioma across 14 medical centres in the USA, Canada, and Germany. Patients were eligible if they had post-surgical clinical or radiographical assessment of …

Determining Risk Factors And Rate Of Surgery After Collagenase Injections For Dupuytren Contracture, Ryan C. Cha, Juliet S. Chung, Sina Ramtin, Asif M. Ilyas

Department of Orthopaedic Surgery Faculty Papers

Purpose: Collagenase injections are a nonsurgical treatment for Dupuytren contracture, but their long-term effectiveness in preventing surgery remains unclear. This study aimed to evaluate the rate of surgical intervention following collagenase treatment and identify whether specific risk factors increase the likelihood of future surgical correction. Methods: This retrospective cohort study utilized the TriNetX US Collaborative network to identify patients diagnosed with Dupuytren contracture between January 2007 and September 2024. Patients initially treated with collagenase injections were identified using relevant current procedural terminology codes. Procedure-specific current procedural terminology codes were then used to determine which patients underwent a subsequent fasciectomy or …

Synthetic Zfta Fusions Pinpoint Disordered Protein Domain Acquisition As A Mechanism Of Brain Tumorigenesis, A Arabzade, H K Shirnekhi, S Varadharajan, S M Ippagunta, A H Phillips, N Laboe, D W Baggett, Wahiduzzaman, M Jo, T Zheng, R Pathak, D Gee, D Bhimsaria, H Wu, X Gao, J Liu, E Emanus, A Bland, A Kardian, A Hancock, B Holcomb, T Wright, T Bugbee, H Sun, M Zhai, E Caesar, M Park, S Tripathi, A Shirinifard, K Lowe, A Khalighifar, R A Petersen, S King, D Stabley, A Pitre, G E Campbell, C-G Park, W T Freyaldenhoven, B Chandra, Y Xia, E Bonten, A Achari, S Kandikonda, A Carisey, S B Pounds, J Xu, D W Ellison, B Deneen, K C Bertrand, R W Kriwacki, S C Mack

Children’s Nutrition Research Center Staff Publications

Over 95% of ependymomas that arise in the cortex are driven by a gene fusion involving the zinc finger translocation-associated (ZFTA) protein. Here, using super-resolution and lattice light-sheet microscopy, we demonstrate that the most frequent fusion variant, ZFTA-RELA (ZR), forms dynamic nuclear condensates that are required for oncogene expression and tumorigenesis. Mutagenesis studies of ZR reveal a key intrinsically disordered region (IDR) in RELA that governs condensate formation. Condensate-modulating IDR mutations introduced into ZR impaired its genomic occupancy at oncogenic loci and inhibited the recruitment of transcriptional effector proteins, such as MED1, BRD4 and RNA polymerase II. Using nuclear magnetic …

Proximity-Dependent Proteomics And Network Analysis Of Adenylyl Cyclase Isoforms 5, 6, And 9 In Cardiomyocytess, Taeyeop Park, Yong Li, Neha Arora, Anibal Garza-Carbajal, Karen Colwill, Cassandra J Wong, Yong Zhou, Carmen W Dessauer

Faculty, Staff and Student Publications

cAMP influences multiple aspects of cardiac biology, including the regulation of contraction, relaxation, and overall stress responses. The functional outcomes of cAMP are driven by the spatial arrangement of enzymes that produce and degrade cAMP (adenylyl cyclase [AC] and phosphodiesterase, respectively), together with the downstream targets of cAMP. We performed proximity-dependent biotin identification (BioID) of near-neighbor interactions proteomics in cardiomyocytes to generate proximity maps for three cardiac AC isoforms. Processing and trafficking functions were the most common gene ontology terms for ACs, with AC5 and AC6 generating unique proximal protein sets compared to AC9. AC5/6 proximal proteins showed significant localization …

Buprenorphine Salivary Gland Accumulation Sustaining High Oral Fluid Exposure And Increasing The Risk Of Streptococcus Mutans Biofilm Formation, Zicong Zheng, Jie Chen, Songpol Srinual, Vesna Tumbas Šaponjac, Taijun Yin, Bing-Yan Wang, Rongjin Sun, Ming Hu

Faculty, Staff and Student Publications

Objectives: The US Food and Drug Administration (FDA) issued a warning about buprenorphine-induced dental caries of unknown mechanism in 2022. To investigate the potential mechanism, the association between local buprenorphine exposure and dental biofilm formation will be explored in this study.

Methods: Female F344 rats were dosed with sublingual buprenorphine film or intravenous injection to explore the oral cavity exposure of the buprenorphine. The buprenorphine distribution in salivary glands after the sublingual and intravenous administration was also evaluated. To investigate the effects of buprenorphine exposure on dental caries formation, buprenorphine's impact on the biofilm formation of S. mutans in vitro …

Cardiogenic Shock With Acute Myocardial Infarction Among Older Adults In The United States, Taha Mansoor, Ali Bin Jabbar, Mahmoud Ismayl, Dylan Yu, Kartik Gupta, Sachin Parikh, Austin Brubaker, Abdul Minhas, Dmitry Abramov, Salim S. Virani

Population Health, East Africa

Background: Characteristics and outcomes associated with cardiogenic shock (CS) with acute myocardial infarction (AMI) in older patients have not been well characterized.

Objectives: The purpose of this study was to investigate characteristics and outcomes of older patients admitted with CS with AMI.

Methods: We used the National Inpatient Sample database to evaluate clinical characteristics of hospitalizations, clinical outcomes, and health care utilization of hospitalizations of older patients ≥80 years with CS and AMI from 2003 to 2021. We also compared data from older patients with a reference relatively younger patient population (18-79 years).

Results: During the study period, …

Mechanisms Underlying Treatment-Resistant Depression: Exploring Sex-Based Biological Differences, Francisco E R Da Silva, Atakan Yucel, Antonio P M Menezes, Ana C Ruiz, Marcela C Carbajal Tamez, Tatiana Barichello, Giselli Scaini, Joao Quevedo

Faculty, Staff and Student Publications

Treatment-resistant depression (TRD) represents a severe and complex subtype of major depressive disorder (MDD), affecting approximately 30% of patients who fail to respond adequately to multiple standard antidepressant therapies. While the pathophysiology of TRD remains incompletely understood, emerging evidence suggests that sex-based biological differences might influence its onset, progression, and treatment response. Women are disproportionately affected by depression and are more likely to experience residual symptoms and treatment resistance, potentially due to hormonal fluctuations, immune system differences, and variations in brain circuitry and neuroplasticity. This narrative explores the current literature on the mechanisms underlying TRD, with a particular emphasis on …

Rna-Binding Proteins Mediate The Maturation Of Chromatin Topology During Differentiation, Bondita Dehingia, Małgorzata Milewska-Puchała, Marcin Janowski, Mahmoud-Reza Rafiee, Misbah Abbas, Aleksandra Piotrowska, Jan Senge, Piotr Blaut, Dietrich Walsh, Jacqueline Severino, Debadeep Chaudhury, Sajjad Iqbal, Rogelio Montiel-Manriquez, Sylwia Jankowska, Peyman Zare, Wolfgang Huber, Jianliang Xu, Rafael Casellas, Timo Zimmermann, Paweł Dłotko, Jeroen Krijgsveld, Aleksandra Pękowska

Faculty, Staff and Student Publications

Topologically associating domains (TADs) and chromatin architectural loops impact promoter-enhancer interactions, with CCCTC-binding factor (CTCF) defining TAD borders and loop anchors. TAD boundaries and loops progressively strengthen upon embryonic stem (ES) cell differentiation, underscoring the importance of chromatin topology in ontogeny. However, the mechanisms driving this process remain unclear. Here we show a widespread increase in CTCF-RNA-binding protein (RBP) interactions upon ES to neural stem (NS) cell differentiation. While dispensable in ES cells, RBPs reinforce CTCF-anchored chromatin topology in NS cells. We identify Pantr1, a non-coding RNA, as a key facilitator of CTCF-RBP interactions, promoting chromatin maturation. Using acute CTCF …

The Antifungal Mechanism Of Entv-Derived Peptides Is Associated With A Reduction In Extracellular Vesicle Release, Giuseppe Buda De Cesare, Melissa R Cruz, Shane A Cristy, Luis A Vega, Robert Zarnowski, Antonino Zito, Shantanu Guha, David R Andes, Danielle A Garsin, Michael C Lorenz

Faculty, Staff and Student Publications

Candida albicans, an opportunistic fungal pathogen, causes systemic and superficial infections, especially in immunocompromised patients. Treatment of fungal infections is complicated by limited antifungal options and the development of drug resistance. Previous work from our group demonstrated the efficacy of the anti-virulence peptide EntV and shorter variants against C. albicans infection in various animal models, including mouse models of oropharyngeal candidiasis and disseminated infection and a rat venous catheter model. However, the mechanism of action, which abrogates fungal virulence without fungicidal or fungistatic activity, has remained unknown. We used a combination of cell biological, biochemical, genomic, and genetic approaches to …

Wuse-Oil Compound 03 Mitigates Radiation-Induced Oral Mucositis By Modulating Oral Microbiota To Mediate Tlr4/Nf-Κb Pathway And Inhibit M1 Macrophage Polarization, Liqun Jia, Rong Huang, Chen Chen, Feng Teng, Tian Gu, Huafeng Liu, Li Ma, Ye Feng, Jingyi Long, Zihan Jin, Dong Li, Dongmei Chen, Yanni Lou

Faculty, Staff and Student Publications

Background: Radiation-induced oral mucositis (RIOM) is a prevalent condition among patients with head and neck cancer undergoing radiotherapy. It is characterized by a high incidence and severe symptoms that significantly compromise patients' quality of life. Currently, there exists no consensus regarding an effective treatment modality. Wuse-oil Compound 03 (WC03), a Traditional Chinese Herbal Medicine, demonstrates potential in managing RIOM.

Purpose: This study aims to investigate the efficacy of WC03 in treating RIOM through the modulation of oral microbiota and associated biological pathways.

Study design: Mechanism study experimental design.

Methods: A rat model of RIOM was established via radiation exposure. WC03 …

Analysis Of Hospital Costs For Robotic And Open Pancreatectomy Incurred During The Implementation Of A Robotic Pancreatectomy Program At A Cancer Center, Heather G Lyu, Yuki Hirata, Pamela W Lu, Jess E Maxwell, Rebecca A Snyder, Michael P Kim, Hop Tran Cao, Ching-Wei D Tzeng, Matthew H G Katz, Naruhiko Ikoma

Faculty, Staff and Student Publications

Background: Costs associated with robotic pancreatectomy compared to those of open pancreatectomy are assumed to be high but are not well known, particularly during the initial implementation of the robot.

Study design: Patients who underwent pancreatectomy for any diagnosis from January 2017 to August 2021 were identified retrospectively. Total hospital cost was calculated using intraoperative, inpatient, and outpatient costs within 30 days of surgery. The ratio of the total cost of each pancreatectomy to the average cost of all operations at our center was used to represent cost without sharing proprietary financial data. Propensity score matching was performed to account …

Polydrug Abuse: Choice Between Drugs As A Function Of Concurrent Nonindependent Ratio Sizes, Richard A Meisch, Thomas H Gomez, Scott D Lane

Faculty, Staff and Student Publications

Polydrug abuse is the persistent self-administration of more than one reinforcing drug. The present study provided rhesus monkeys concurrent access to two drugs: 8% alcohol and solutions of either cocaine or methadone. The liquids were available under concurrent nonindependent fixed-ratio (FR) schedules across increasing and then decreasing ratio sizes. These schedules generate high rates of changeover responses and yield a dependent variable of responses per delivery that is not rigidly tied to the ratio-schedule value. The programmed schedule size was equal for both liquids and increased in the sequence 8, 16, 32, and so on until responding decreased, whereupon the …

Secretogranin 2 Binds Lilrb4 Resulting In Immunosuppression, Xing Yang, Ryan Huang, Meng Fang, Yubo He, Jingjing Xie, Xiaoye Liu, Chengcheng Zhang, Qi Lou, Mi Deng, Wei Xiong, Cheryl Lewis, Zade Sadek, Ankit Gupta, Lianqi Chen, Xuewu Zhang, Lei Guo, Lin Xu, Ningyan Zhang, Zhiqiang An, Cheng Cheng Zhang

Faculty, Staff and Student Publications

Immunosuppressive myeloid cells are important in a variety of physiological and pathological contexts, including tumor development, but how hormones might regulate their activity is unclear. Secretogranins, a family of secretory proteins in endocrine and neuronal cells, are proposed to function as prohormones or hormones, but their specific receptors are unknown. Here we show that secretogranin 2 (SCG2), a granin family member, functionally interacts with leukocyte immunoglobulin-like receptor B4 (LILRB4) on monocytic cells. Tumor-derived SCG2 promotes tumor growth in myeloid-specific LILRB4 transgenic mice in a T cell-dependent manner, whereas SCG2 deficiency in host mice impairs tumor progression and reduces infiltration of …

Peripartum Depression Pharmacotherapies Targeting Gaba-Glutamate Neurotransmission, Alan C Courtes, Louisa Smitherman, Lokesh Shahani, Jair C Soares, Laura Goetzl, Rodrigo Machado-Vieira

Faculty, Staff and Student Publications

Peripartum depression (PPD) represents a significant public health concern, affecting 10-17% of women globally. Traditional monoaminergic treatments demonstrate limited efficacy and delayed onset of action. The glutamate-GABA imbalance hypothesis provides a novel theoretical framework for understanding depression pathophysiology and developing targeted therapeutic interventions. This review examines emerging pharmacotherapeutic approaches targeting glutamatergic and GABAergic neurotransmitter systems for PPD treatment. Search criteria targeted randomized clinical trials investigating GABA-A-positive allosteric modulators (brexanolone, zuranolone, and ganaxolone) and NMDA receptor antagonists (ketamine and esketamine) in PPD patients. Brexanolone was the first neurosteroid to receive FDA approval for PPD, while zuranolone also shows promise. Ketamine and …

Role Of Exchange Proteins Directly Activated By Camp Signaling In Vascular Remodeling, Xiaodong Cheng, Hua Liu, Wenbo Zhang, Wenli Yang, Fang Mei

Faculty, Staff and Student Publications

Vascular remodeling is a complex process involving the coordinated actions of multiple cellular signaling pathways in various cell types, leading to structural and functional changes in blood vessels. These changes can be adaptive, as in wound healing, or maladaptive, as seen in chronic vascular diseases such as atherosclerosis, hypertension, and retinopathy. Exchange proteins directly activated by cAMP (EPACs) are key players in cAMP-mediated cell signaling, distinct from the more traditionally studied protein kinase A pathway. EPAC proteins are guanine nucleotide exchange factors for the small G proteins Rap1 and Rap2. Recent studies have also revealed noncanonical functions of EPAC1 involving …

Risk Of Second Primary Lung Cancer Among Cancer Survivors Stratified By The Site Of First Primary Cancer And The Lung Cancer Screening Eligibility Status, Sara Nofal, Edwin J Ostrin, Jianjun Zhang, Jia Wu, Paul Scheet, Mara B Antonoff, John V Heymach, Iakovos Toumazis

Faculty, Staff and Student Publications

Personal history of cancer is an independent risk factor for developing lung cancer. However, it is not considered in the current US lung cancer screening (LCS) guidelines. In this study, we assessed the risk of developing lung cancer among cancer survivors across 24 different sites of first primary cancer stratified by their LCS eligibility status. Using data from the Patient History Database at the University of Texas MD Anderson Cancer Center, we calculated and compared the cumulative incidence of second primary lung cancer, the overall and the LCS eligibility status-specific, stratified by the site of first primary cancer among cancer …