Pharmacy and Pharmaceutical Sciences Commons^™

Evaluation Of Peptides And Peptide–Doxorubicin Conjugates Designed And Synthesized For Targeting Triple-Negative Breast Cancer Via Cell-Surface Receptors, Shih-Jing (Jane) Yao

Pharmaceutical Sciences (PhD) Dissertations

A significant problem faced in oncology is the lack of chemotherapeutic agents that are tumor site-specific, resulting in reduced therapeutic efficacy and unintended infliction of harm to surrounding healthy tissues and cells that often lead to serious side effects. Current strategies being explored to circumvent this issue aim to refine delivery of  chemotherapeutic agents specifically to tumor sites, which may be achieved via conjugation of these agents to biomarker-specific ligands. This forms the foundation of ligand-targeted drug delivery. Among different breast cancers, treatment of the triple-negative breast cancer (TNBC) subtype has been particularly challenging, largely due to the absence of …

Amyloid Β-Cholesterol Interplay: Removal Of Cholesterol From The Membranes To Catalyze Aggregation And Amyloid Pathology, Rishiram Baral, Ruan Van Deventer, Yuri L. Lyubchenko

Journal Articles: Pharmaceutical Sciences

The interplay between the cholesterol metabolism and assembly of Aβ42 (the 42-residue form of the amyloid-β peptide) peptides in pathological aggregates is considered one of the major molecular mechanisms in the development of Alzheimer's disease (AD). Numerous in vitro studies led to the finding that high cholesterol levels in membranes accelerate the production of Aβ aggregates. The molecular mechanisms explaining how cholesterol localized inside the membrane bilayer catalyzes the assembly of Aβ aggregates above the membrane remain unknown. We addressed this problem by combining different AFM modalities, including imaging and force spectroscopy, with fluorescence spectroscopy. Our combined studies revealed that …

In Vitro Dihalobenzene Nephrotoxicity In Isolated Kidney Cells, Jana Ahmed Sherif

Theses, Dissertations and Capstones

Brominated and chlorinated benzenes are common industrial chemicals linked to kidney injury. This study evaluated the nephrotoxicity of several mono- and dihalogenated derivatives using isolated kidney cells from male Fischer 344 rats. LDH release and trypan blue exclusion were measured after 30- and 60-minute exposures to 0.25–1.0 mM to test compounds. Toxicity increased with increased concentration and longer times. Mixed-halogen bromobenzenes, particularly 1-bromo-4-chlorobenzene, showed one of the highest toxicity levels, while 1,4dichlorobenzene was the most toxic chlorobenzene. Antioxidants (glutathione, ascorbate, and αtocopherol) markedly reduced injury, indicating oxidative mechanisms play a role in toxicity. cytochromes P450 (CYP) inhibitors (piperonyl butoxide and …

Pbms And Exploitation Of America's Prescription Drug System, Ayaan Nihal Unni

A with Honors Projects

This project aims to tackle the issue of America's disproportionately expensive  prescription drug system by tracking the issue to its powerful intermediaries: PBMs. I then analyze procedures both the government and the people can undertake in order to overcome this faulty system.

Evaluation Of The Physical Properties And In Vitro Safety Of Chitosan-Quercus Infectoria Topical Gel, Rani Naga Rakshitha Tillapudi

Theses, Dissertations and Capstones

Due to ongoing inflammation, inadequate blood flow, oxidative stress, and reduced tissue regeneration, chronic diabetic wounds heal slowly, which is a serious health concern. It is important to examine novel strategies that tackle these issues because conventional treatments frequently fail. Therefore, this study examined the physical properties and biocompatibility of a novel topical gel formulated with chitosan and Quercus infectoria gall extract.

Over 28 days, pH, spreadability, texture, homogeneity, color, and drug concentration were assessed. UV-visible spectrophotometry and FTIR analysis were used to establish chemical stability. The MTT assay was used to test its safety in human dermal fibroblast adult …

The Effects Of Antidepressant Medications On Sleep Quality In Dominican University Of California Students, Natalie L. Davis, Kenna Wohlford, Stephanie Lee

Physician Assistant Studies | Graduate Research Papers

We spend approximately one third of our life time sleeping or attempting to sleep. The quality of our sleep is equally, if not more important than the amount of sleep we get. This study assesses the effects that medications, specifically antidepressants, can have on sleep quality in Dominican University of California students. 118 participants completed a Qualtrics survey including questions regarding stress, sleep quality, medication lists, and demographics. This study utilized the Pittsburgh Sleep Quality Index (PSQI) to quantify participants’ sleep quality as the outcome. Participant stress levels were assessed with a Likert scale question asking for stress levels on …

From Fog To Function: An Occupational Therapist's Guide To Evaluating And Treating Cancer-Related Cognitive Impairments, Lauren E. Toner

Entry-Level Occupational Therapy Doctorate - Doctoral Capstone Symposium

Cancer – related cognitive impairment (CRCI) is a common side effect of cancer treatment that interferes with cancer survivors’ occupational performance, independence, and quality of life. Despite its high prevalence, CRCI remains under recognized and inconsistently addressed within oncology care. About 70% of individuals diagnosed with cancer report cognitive changes during or after treatment, yet many do not receive treatment. Occupational therapists are clinically trained to evaluate and treat functional cognition, activities of daily activities, instrumental activities of daily living, and client centered goals, positioning them as key providers in addressing CRCI. However, limited occupational therapy specific resources have hindered …

Proteome-Based Identification And Validation Of Nxpe3 In Childhood Acute Lymphoblastic Leukaemia, Najia Tabassum, Yamna Khurshid, Basir Syed, Aftab Ahmad, Sadia Muhammad, Rehan Imad, Talat Mirza

Pharmacy Faculty Articles and Research

Background: Childhood acute lymphoblastic leukaemia (cALL) tends to metastasize to central nervous system. Treatment with antileukemic agents against CNS leukaemia is an essential component for cure in ALL. Hence, it is essential to identify biomarkers for CNS infiltration. Proteomics, supported by mass spectrometry, is the platform for exploring biomarkers in various biological samples, contributing to translational research. Objectives: This study aimed to identify the plasma proteome profile of children across different risk groups of cALL. Neurexophilin and PC-esterase family, member 3 (NXPE3), was validated. The protein-protein interactions (PPI) of NXPE3 were evaluated with bioinformatics analyses. Methods: Plasma …

Nanocomposite Mediated Delivery Of 5-Fluorouracil Using Silver Nanoparticles To Promote Wound Healing, Kamal Nath Kasi

Theses, Dissertations and Capstones

Chronic wounds, particularly in diabetic patients, remain a significant clinical challenge due to the complex interaction of persistent infection, chronic inflammation, and impaired cellular regeneration. Conventional drug therapies often fail to achieve effective treatment due to rapid drug degradation, poor targeting, and localized toxicity. This study explores a nanotechnology-based approach by developing and evaluating 5-FU loaded AgNP (AgNP–5FU) as a controlled drug delivery system. AgNP (AgNP) were synthesized and characterized using scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, particle size, and zeta potential analysis, while Fourier Transform Infrared Spectroscopy (FTIR) analysis suggested possible interaction between 5-FU and the …

Development And In Vitro Characterization Of 5-Fluorouracil–Loaded Plga Nanoparticles For Controlled Drug Delivery, Kavya Yandapalli

Theses, Dissertations and Capstones

Non-Alcoholic Fatty Liver Disease (NAFLD) is a progressive metabolic disorder characterized by excessive lipid accumulation in hepatocytes and chronic inflammation. Nanoparticle-based drug delivery systems offer a promising strategy to enhance therapeutic efficacy while minimizing systemic toxicity. The objective of this study is to formulate and characterize 5-FU–loaded PLGA nanoparticles and evaluate their in vitro performance. 5-FU–loaded PLGA nanoparticles were prepared using the double emulsion solvent evaporation method. The nanoparticles were characterized by particle size, polydispersity index, zeta potential and SEM. Drug encapsulation efficiency, loading capacity and in vitro drug release studies were conducted. The formulated nanoparticles exhibited sizes within the …

Tramadol For Treatment Of Neurogenic Cough: A Retrospective Case Series, Benjamin Joseph Rubinstein, Sheela Saidha, John Todd Sinacori

Department of Otolaryngology (ENT) Faculty Publications

Objectives

Explore the efficacy of tramadol for neurogenic cough and describe the longitudinal treatment experience.

Methods

A retrospective case series of adults with chronic cough who were treated with tramadol for neurogenic cough. A complete response was defined as no pathologic coughing, and a partial response was defined as 50% or greater reduction in severity or frequency.

Results

Sixty-nine patients were included. 38% of patients reported a complete response with an additional 33% reporting a partial response. The most common successful dosing regimen was 50 mg BID. Age, gender, and BMI did not impact treatment response. Patients with a history …

Early And Sustained Improvements In Sense Of Smell With Tezepelumab Treatment In Patients With Chronic Rhinosinusitis With Nasal Polyps (Waypoint), Joaquim Mullol, Joseph K. Han, Tanya M. Laidlaw, Claire Hopkins, Anju T. Peters, Oliver Pfaar, Martin Desrosiers, Stella E. Lee, Andrew P. Lane, Claudia Chen, Yun Chon, Sandhia S. Ponnarambil, Andrews Foster, Andrew W. Lindsley, Christopher S. Ambrose

Department of Otolaryngology (ENT) Faculty Publications

Background

Loss of smell is a principal symptom of chronic rhinosinusitis with nasal polyps (CRSwNP), affecting health-related quality of life and posing a safety hazard.

Methods

WAYPOINT (NCT04851964), a phase 3, multicenter trial in adults with uncontrolled CRSwNP, randomized patients 1:1 to receive tezepelumab 210 mg or placebo subcutaneously every 4 weeks for 52 weeks. Changes from baseline in biweekly mean Nasal Polyposis Symptom Diary (NPSD) loss of smell item, University of Pennsylvania Smell Identification Test (UPSIT), and 22-item Sino-Nasal Outcome Test (SNOT-22) loss of smell/taste item scores, as well as anosmia (UPSIT score ≤18) prevalence, were assessed over 52 …

Buprenorphine Utilization Following Removal Of Prior Authorization Requirements In The Kentucky Medicaid Population, Dustin K. Miracle, Lindsey R. Hammerslag, Svetla Slavova, Michelle R. Lofwall, Sharon L. Walsh, Jeffery Talbert, Patricia R. Freeman

Pharmacy Practice and Science Faculty Publications

Purpose: To evaluate changes in buprenorphine dispensing for treatment of opioid use disorder (OUD) among Kentucky Medicaid enrollees following the removal of prior authorization (PA) requirements for the transmucosal buprenorphine combination product.

Methods: We analyzed Kentucky Medicaid claims from 1/1/2016 through 6/30/2023 to identify enrollees with OUD during each quarter (Q1/2017–Q2/2023), using a 12-month lookback window. Segmented regression analysis was used for statistical modeling of an interrupted time series (ITS) design to assess changes in the quarterly proportion of enrollees with OUD receiving buprenorphine for OUD treatment, focusing on the effect of PA removal. The effective date of the PA …

Contemporary Trends In High-Potency P2y12 Receptor Inhibitor Use Among Patients With Acute Myocardial Infarction Undergoing Percutaneous Coronary Intervention, Ayman R. Fath, Binish Qureshi, Amro Aglan, Osamah Altaee, Hend Mansoor, Ahmed Almomani, Karim Al-Azizi, Marwan Saad, Andrew M. Goldsweig, Hani Jneid, Islam Y. Elgendy

Pharmacy Practice and Science Faculty Publications

Background: High‐potency P2Y12 receptor inhibitors (ticagrelor and prasugrel) reduce ischemic outcomes compared with clopidogrel among patients with acute myocardial infarction (AMI) undergoing percutaneous coronary intervention (PCI). This study aims to examine contemporary trends and identify predictors of their use among patients with AMI undergoing PCI in the United States.   Methods: This observational study used electronic health records from >95 US‐based health care organizations. Adults with AMI who underwent PCI between 2016 and 2023 were included. The primary outcome was the prescription of high‐potency P2Y12 receptor inhibitors versus clopidogrel. Multivariable logistic regression was used to identify independent predictors of P2Y12 inhibitor …

Contraceptive Method Provision Patterns Among Rural And Urban Kentucky Medicaid Enrollees, Dustin K. Miracle, Svetla Slavova, Jeffery Talbert, Daniela C. Moga, Patricia R. Freeman

Pharmacy Practice and Science Faculty Publications

Purpose: To characterize contraceptive provision among the Kentucky Medicaid population and assess for rural−urban disparities.

Methods: Kentucky Medicaid claims from the calendar year 2019 were used to identify females at risk for unintended pregnancy (via a modified version of the criteria defined by the US Department of Health and Human Services Office of Population Affairs). Multinomial logistic regression was used to assess the impact of rural−urban residence on contraceptive outcomes, while adjusting for relevant covariates. Outcomes for the multinomial regression model were provision of a: (1) less effective method (i.e., condoms) or no contraceptive; (2) moderately effective method (oral, transdermal, …

The Dietary Burden Of Phosphorus And Aluminum In Ready-To-Eat Wheat Flour Tortillas Exceeds That Of Corn Tortillas: Implications For Patients With Chronic Kidney Disease, Kate Chander Chiang, Robert Yokel, Jason M. Unrine, Kamyar Kalantar-Zadeh, Ajay Gupta

Pharmaceutical Sciences Faculty Publications

Background: Ready-to-eat, shelf-stable tortillas contain several phosphorus- and aluminum-containing additives that may increase the risk of adverse events in patients with chronic kidney disease (CKD).

Objective: The present study aimed to measure the dietary aluminum and phosphorus burden in store-bought corn and wheat flour tortillas. Design: This cross-sectional study analyzed the elemental content of commercially available corn and wheat flour tortillas collected from 2019 to 2020.

Setting: Twenty-one elements were quantified by ICP-MS and ICP-OES from 14 corn and 13 wheat flour tortilla brands purchased from local supermarkets in Southern California in 2019–2020.

Statistical analyses performed: Multiple group comparisons were …

Altered Bile Acid Transport In Liver Disease, Sarah Cayton, Lindsay C. Czuba

Pharmaceutical Sciences Faculty Publications

Background/Objectives: Bile acids, synthesized from cholesterol in the liver, are amphipathic molecules that play an integral role in lipid digestion and absorption, while also serving as systemic endocrine hormones. They continuously undergo enterohepatic circulation, where they interact with various transporter proteins. Dysregulated bile acid transport is associated with the pathogenesis of liver disease. This review summarizes the key findings relating to bile acid transport expression and activity in the pathogenesis of liver disease.

Methods: A review of the literature was performed using PubMed and relevant terms including, but not limited to, “bile acid transporters”, “liver disease”, and “bile acid uptake …

Chronic Alcohol Consumption Disrupts The Gut Microbial And Metabolic Landscapes, Madison B. Blanton, Ethan G. Napier, Katelyn E. Keen, Ethan V. Stuart, Isaac R. Cinco, Hami Hemati, Ronald C. Bruntz, Landon Wilson, Stephen Barnes, Rupak Khadka, Kathleen A. Grant, Ilhem Messaoudi

Pharmaceutical Sciences Faculty Publications

Introduction: Alcohol use disorder (AUD) increases incidence of infections, organ damage, and cancers. Aberrant inflammation is likely a driver of these adverse outcomes. Indeed, chronic alcohol consumption (CAC) rewires macrophages/monocytes toward a hyper-inflammatory phenotype. Prior studies showed increased gut permeability and dysbiosis. Translocation of host- and microbial-derived metabolites could trigger the hyper-inflammatory responses generated by macrophages/monocytes. However, the exact changes in these metabolites remain poorly defined due to confounders that complicate clinical studies and the differences between human and rodent gut microbiomes.

Methods: Here, we utilized a non-human primate model of ethanol self-administration to characterize alcohol-induced alterations in gut microbes …

Optimized Nano-Bilosomes Loaded Ocular Insert As A Promising Approach For Boosting Voriconazole Ocular Bioavailability: In-Vitro, Microbiological, And In-Vivo Assessments, Eman Gomaa

Nanotechnology Research Centre

The eye possesses numerous physiological barriers that significantly limit the absorption of administered drugs, as only < 5 % get through. These barriers restrict drug bioavailability, often necessitating multiple dosing, which can lead to poor patient compliance. The study goal is to efficiently incorporate Voriconazole (VRC), a wide-spectrum antifungal candidate with a short half-life, into stable, biocompatible, non-irritating bile salt nanoparticles (Bilosomes, BLOs) to enhance its ocular delivery. Bilosomes were prepared by the ethanol injection method. Experimental (33) Box–Behnken Design (BBD) was employed; the amount of bile salt, cholesterol, and span-60 were chosen as independent variables, while entrapment efficiency (EE%), cumulative VRC release (Q8h), particle size (PS), zeta potential (ZP), and polydispersity index (PDI) were the dependent variables. The formula of optimization showed EE% (59.04 ± 1.88 %), cumulative release after 8 h (81.35 ± 0.69 %), PS (222.53 ± 2.04 nm), ZP (−72.53 ± 1.75 mV), and PDI (0.225 ± 0.03). It was chemically characterized using DSC and FTIR. Its spherical arrangement was confirmed using TEM. For ophthalmic application, the optimized formula was included in ocular inserts to extend ocular residence time while minimizing dosing frequency. The optimal VRC-loaded bilosomal ocular insert met the acceptable physicochemical criteria, was sterilized using UV radiation for conducting microbiological assay, in-vivo study, and pharmacokinetic analysis. For safety evaluation, an eye irritation study and histopathological examination were conducted. The results confirmed its effectiveness as evidenced by a significantly larger inhibition zone and 8.39-fold enhancement in VRC bioavailability compared to its suspension. These findings support the potential of bilosomes-loaded ocular insert as an effective ocular delivery of VRC.

Curriculum In Pharmacoepidemiology Training Programs: A Cross-Sectional Study To Assess Educational Needs And Alignment With Core Competencies, Amie Goodin, Deborah Layton, Ryan Chung, Vicki Osborne, Chioma Ejekam, Xiaojuan Li, Xuerong Wen, Kristian B. Filion, Luciane Cruz Lopes, Daniela C. Moga

Pharmacy Practice and Science Faculty Publications

Purpose: Pharmacoepidemiology is a key discipline for evidence-based decision-making, yet its educational programs have not been systematically assessed for alignment with international core competencies. Our objectives were to evaluate curricula alignment of pharmacoepidemiology training programs with ISPE-recommended core competency themes and identify key curriculum content development areas.

Methods: The ISPE Core Competencies Workgroup and ISPE leadership developed a curriculum and needs assessment survey, incorporating feedback from global members. The survey was electronically distributed to leaders of pharmacoepidemiology training programs (e.g., department chairs and program directors) using the ISPE contact database, followed by snowball sampling to enhance representation. Institutional respondent characteristics …

Health, Patents, And Path Dependence: India's Pharmaceutical Crossroads, Jacie Bissell

Michigan Technology Law Review

This paper examines how India’s historical commitment to affordable medicine and public health continues to shape its pharmaceutical patent regime, even as the country aspires to become an innovation-driven economy. Through the lens of path dependence, the paper explores how India’s legal and institutional frameworks have created structural constraints on policy reform. Focusing on key moments such as the Patents Act of 1970, the landmark Novartis decision, and India’s evolving stance on the TRIPS waiver during the COVID-19 pandemic, the paper analyzes the tensions between fostering pharmaceutical innovation and maintaining access to affordable medicines. While recent procedural reforms and judicial …

Beyond Clinical Outcomes: The Operational And Financial Benefits Of Insulin Lispro In Hyperkalemia Protocols, Cassandra Van Horn, Kevin Welch, Justin Solomon

MidAmerica Division GME Healthcare Symposium 2026

No abstract provided.

Current Active U.S. Patents Held By Sop Inventors - Updated 3/19/26, Soumyajit Majumdar

U. S. Patents, School of Pharmacy

List of current active U.S. Patents held by the School of Pharmacy Inventors - updated 3/19/26

Effect Of Lifestyle And Medication Adherence On Type 2 Diabetes Management In Hospital Patients, Mohammed Irfan Lari

Covenant Nurses Week 2026

No abstract provided.

Blister Packaging Versus Bottles: Caregiver Accuracy And Child Safety In Pediatric Medication Gummy Administration, Paolo Olimpiada

Nursing | Senior Theses

The safety of medication in pediatric settings has become an increasing concern as gummy-formulated medications have gained popularity in children’s care. Gummy-formulated medications have a close resemblance to candy, and this may mislead children to ingest additional doses or more than what was prescribed. Children also depend a lot on their caregivers for medications. Therefore, the design of packaging would be impactful in supporting medication dosing accuracy. And studies have evaluated safety features of packaging related to adherence, misuse, and unintended administration. However, limited studies have examined the influence of medication packaging on the dosing accuracy at the time of …

Ethical Considerations For Hospice Patients In Inpatient Settings: A Systematic Review And Thematic Analysis, Matthew D. Harry

Honors Theses and Capstones

Hospice care is intended to prioritize comfort, dignity, symptom management, and quality of life for individuals with life-limiting illness. However, when hospice-eligible patients are managed within inpatient hospital settings, significant ethical challenges frequently emerge due to the tension between comfort-focused care and the curative, intervention-driven structure of acute care medicine. This paper presents a systematic literature review and thematic analysis examining the ethical considerations surrounding hospice patients in inpatient settings, with particular attention to clinical decision-making, communication, prognostic uncertainty, moral distress among nurses, and conflicts involving patient autonomy and family wishes. A structured review of peer-reviewed literature was conducted using …

Development Of Tunable Rose Bengal Based-Nanogumbos As Potential Selective Chemotherapeutic Agents, William J.A. Russell

Honors College Theses

As cancer remains one of the greatest threats to the global population, the development of chemotherapeutic agents that are selective and tunable is of critical importance. Herein, a series of Rose Bengal (RB)-based GUMBOS, a group of uniform materials based on organic salts, were synthesized via counterion exchange between [Na]₂[RB] and three organic cations: tetrabutylphosphonium bromide [TBP][Br], tetraphenylphosphonium chloride [TPP][Cl], and 1-dodecyl-3-methylimidazolium chloride [C₁₂MIm][Cl]. The resulting GUMBOS were characterized through FT-IR, ESI-MS, NMR, and UV-Vis Spectroscopy. Partition coefficient studies indicated all GUMBOS exhibited hydrophobic physiochemical characteristics. These hydrophobic RB-based GUMBOS …

Effects Of Glucagon And Insulin On Sw480 Colorectal Cancer Cells In Combination With Cisplatin, Sarah M. Gabous, Andrea Florian

SPARK Symposium Presentations

Colorectal cancer is known to be one of the most common forms of cancer in the world. Over time, treatment responses are affected by various metabolic changes along with chemotherapies. Glucagon signaling and Insulin are linked to colorectal cancer and have also been shown to affect tumor growth, as well as the chemotherapy drug response.In this experimental study, the purpose was to determine whether glucagon and insulin decrease the viability of SW480 colorectal cancer cells during cisplatin (CDDP) treatment. CRC cells were treated with cisplatin alone and in combination with either glucagon or insulin, and cell viability was measured to …

Comparative In Vitro Activity Of Aztreonam–Avibactam And Aztreonam Plus Ceftazidime–Avibactam Against Stenotrophomonas Maltophilia Complex, Ashlan J. Kunz Coyne, Rachel Gray, Pavani Gonnabathula, Elizabeth S. May, Pranita A. Tamma, Alex Do

Pharmacy Practice and Science Faculty Publications

Members of the Stenotrophomonas maltophilia complex are intrinsically multidrug-resistant pathogens that disproportionately affect critically ill patients. Aztreonam–avibactam (ATM–AVI), FDA approved in 2025, combines aztreonam (ATM; stable to L1 β-lactamase) with avibactam (AVI; an L2 β-lactamase inhibitor). Aztreonam plus ceftazidime–avibactam (ATM–CZA) has been used as a surrogate for ATM–AVI, but direct comparisons between the two regimens are lacking. Twenty-three clinical S. maltophilia complex isolates underwent broth microdilution (BMD) testing for ATM, ceftazidime, ATM–AVI, and ATM–CZA, with gradient diffusion performed in parallel for ATM–AVI and ATM–CZA. Static 24-h time-kill assays at humanized steady-state Cmax concentrations evaluated bactericidal activity (≥3-log₁₀ reduction). Semi-mechanistic pharmacodynamic …

Social Engagement Moderates The Relationship Between Cognitive Functioning, Depressive Symptoms, And Restless Sleep In Older Black Adults, Sunkanmi Folorunsho, Olufunmilola Abraham, Darlingtina K. Esiaka

Pharmacy Practice and Science Faculty Publications

INTRODUCTION: Older Black adults face higher dementia risk, but it is unclear whether social engagement offsets the effects of depression and restless sleep.

METHODS: We analyzed 1,905 Black adults aged 50+ from the 2016-2020 Health and Retirement Study (HRS). Linear mixed-effects models tested how depressive symptoms, restless sleep, and social engagement predicted baseline cognition and cognitive decline.

RESULTS: Higher depressive symptoms and restless sleep were associated with lower baseline cognition (about 0.2 and 0.5 points lower) and faster decline (β×time ≈ −0.07 and −0.05). Greater social engagement predicted higher baseline cognition (about 0.6 points higher) and slower decline (β×time ≈ …