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2025

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Articles 23941 - 23970 of 24469

Full-Text Articles in Medicine and Health Sciences

Defining Spine Cancer Pain Syndromes: A Systematic Review And Proposed Terminology, Markian Pahuta, Ilya Laufer, Sheng-Fu Larry Lo, Stefano Boriani, Charles Fisher, Nicolas Dea, Michael H Weber, Dean Chou, Arjun Sahgal, Laurence Rhines, Jeremy Reynolds, Aron Lazary, Alessandro Gasbarrinni, Jorrit-Jan Verlaan, Ziya Gokaslan, Chetan Bettegowda, Mohamed Sarraj, Ori Barzilai, Ao Spine Knowledge Forum Tumor Jan 2025

Defining Spine Cancer Pain Syndromes: A Systematic Review And Proposed Terminology, Markian Pahuta, Ilya Laufer, Sheng-Fu Larry Lo, Stefano Boriani, Charles Fisher, Nicolas Dea, Michael H Weber, Dean Chou, Arjun Sahgal, Laurence Rhines, Jeremy Reynolds, Aron Lazary, Alessandro Gasbarrinni, Jorrit-Jan Verlaan, Ziya Gokaslan, Chetan Bettegowda, Mohamed Sarraj, Ori Barzilai, Ao Spine Knowledge Forum Tumor

Faculty, Staff and Student Publications

STUDY DESIGN: Systematic Review.

OBJECTIVES: Formalized terminology for pain experienced by spine cancer patients is lacking. The common descriptors of spine cancer pain as mechanical or non-mechanical is not exhaustive. Misdiagnosed spinal pain may lead to ineffective treatment recommendations for cancer patients.

METHODS: We conducted a systematic review of pain terminology that may be relevant to spinal oncology patients. We provide a comprehensive and unbiased summary of the existing evidence, not limited to the spine surgery literature, and subsequently consolidate these data into a practical, clinically relevant nomenclature for spine oncologists.

RESULTS: Our literature search identified 3515 unique citations. Through …


The Influence Of The Microbiome On Radiotherapy And Dna Damage Responses, Aadil Sheikh, Michael A Curran Jan 2025

The Influence Of The Microbiome On Radiotherapy And Dna Damage Responses, Aadil Sheikh, Michael A Curran

Faculty, Staff and Student Publications

Colorectal cancer (CRC) is one of the most prevalent cancers in terms of diagnosis and mortality. Radiotherapy (RT) remains a mainstay of CRC therapy. As RT relies on DNA damage to promote tumor cell death, the activity of cellular DNA damage repair pathways can modulate cancer sensitivity to therapy. The gut microbiome has been shown to influence intestinal health and is independently associated with CRC development, treatment responses and outcomes. The microbiome can also modulate responses to CRC RT through various mechanisms such as community structure, toxins and metabolites. In this review we explore the use of RT in the …


Patient-Reported Outcomes During Pelvic Radiation Therapy: A Secondary Analysis On Sexual Function From Nrg-Rtog 1203, Kelsey L Corrigan, Rebecca Paulus, Ann H Klopp, Lari B Wenzel, Anamaria R Yeung, J Spencer Thompson, Desiree E Doncals, Vijayananda Kundapur, Nancy H Wiggers, Dasarahally S Mohan, Sharad A Ghamande, Shannon N Westin, Kara L Schnarr, Michael L Haas, David K Gaffney, Steven E Waggoner, Pamela J Vanderwall, Noha T Jastaniyah, Stephanie L Pugh, Lisa A Kachnic Jan 2025

Patient-Reported Outcomes During Pelvic Radiation Therapy: A Secondary Analysis On Sexual Function From Nrg-Rtog 1203, Kelsey L Corrigan, Rebecca Paulus, Ann H Klopp, Lari B Wenzel, Anamaria R Yeung, J Spencer Thompson, Desiree E Doncals, Vijayananda Kundapur, Nancy H Wiggers, Dasarahally S Mohan, Sharad A Ghamande, Shannon N Westin, Kara L Schnarr, Michael L Haas, David K Gaffney, Steven E Waggoner, Pamela J Vanderwall, Noha T Jastaniyah, Stephanie L Pugh, Lisa A Kachnic

Faculty, Staff and Student Publications

Purpose: NRG-RTOG 1203 reported that intensity-modulated radiation therapy (IMRT) reduced patient-reported GI toxicities in patients with cervical/endometrial cancer receiving postoperative RT, compared with 3-dimensional conformal radiation therapy (3DRT). We conducted a secondary analysis of patient-reported sexual function (PR-SF) among treatment groups to identify factors associated with sexual dysfunction.

Methods and materials: Patients on NRG-RTOG 1203 were randomly assigned to 3DRT versus IMRT and completed Patient-Reported Outcomes (PRO)-Common Terminology Criteria for Adverse Events (CTCAE) and FACT-Cx surveys at baseline, week 5 of RT, and at 4-6 weeks, 1 year, and 3 years after RT. Patient responses to FACT-Cx sexual function questions …


Reproducibility And Repeatability Of 18f-(2s, 4r)-4-Fluoroglutamine Pet Imaging In Preclinical Oncology Models, Gregory D Ayers, Allison S Cohen, Seong-Woo Bae, Xiaoxia Wen, Alyssa Pollard, Shilpa Sharma, Trey Claus, Adria Payne, Ling Geng, Ping Zhao, Mohammed Noor Tantawy, Seth T Gammon, H Charles Manning Jan 2025

Reproducibility And Repeatability Of 18f-(2s, 4r)-4-Fluoroglutamine Pet Imaging In Preclinical Oncology Models, Gregory D Ayers, Allison S Cohen, Seong-Woo Bae, Xiaoxia Wen, Alyssa Pollard, Shilpa Sharma, Trey Claus, Adria Payne, Ling Geng, Ping Zhao, Mohammed Noor Tantawy, Seth T Gammon, H Charles Manning

Faculty, Staff and Student Publications

Introduction: Measurement of repeatability and reproducibility (R&R) is necessary to realize the full potential of positron emission tomography (PET). Several studies have evaluated the reproducibility of PET using 18F-FDG, the most common PET tracer used in oncology, but similar studies using other PET tracers are scarce. Even fewer assess agreement and R&R with statistical methods designed explicitly for the task. 18F-(2S, 4R)-4-fluoro-glutamine (18F-Gln) is a PET tracer designed for imaging glutamine uptake and metabolism. This study illustrates high reproducibility and repeatability with 18F-Gln for in vivo research.

Methods: Twenty mice bearing colorectal cancer cell line xenografts were injected with ~9 …


Patterns Of Loco-Regional Progression And Patient Outcomes After Definitive-Dose Radiation Therapy For Anaplastic Thyroid Cancer, Julianna K Bronk, Alexander Augustyn, Abdallah S R Mohamed, C David Fuller, Adam S Garden, Amy C Moreno, Anna Lee, William H Morrison, Jack Phan, Jay P Reddy, David I Rosenthal, Michael T Spiotto, Steven J Frank, Ramona Dadu, Naifa Busaidy, Mark Zafereo, Jennifer R Wang, Anastasios Maniakas, Renata Ferrarotto, Priyanka C Iyer, Maria E Cabanillas, G Brandon Gunn Jan 2025

Patterns Of Loco-Regional Progression And Patient Outcomes After Definitive-Dose Radiation Therapy For Anaplastic Thyroid Cancer, Julianna K Bronk, Alexander Augustyn, Abdallah S R Mohamed, C David Fuller, Adam S Garden, Amy C Moreno, Anna Lee, William H Morrison, Jack Phan, Jay P Reddy, David I Rosenthal, Michael T Spiotto, Steven J Frank, Ramona Dadu, Naifa Busaidy, Mark Zafereo, Jennifer R Wang, Anastasios Maniakas, Renata Ferrarotto, Priyanka C Iyer, Maria E Cabanillas, G Brandon Gunn

Faculty, Staff and Student Publications

Background: The aim of this study is to characterize the patterns of loco-regional progression (LRP) and outcomes after definitive-dose intensity modulated radiation therapy (IMRT) for anaplastic thyroid cancer (ATC) with macroscopic neck disease at the time of IMRT.

Methods: Disease/treatment characteristics and outcomes for patients with unresected or incompletely resected ATC who received IMRT (≥45 Gy) were retrospectively reviewed. For those with LRP after IMRT, progressive/recurrent gross tumor volumes (rGTV) were contoured on diagnostic CTs and co-registered with initial planning CTs using deformable image registration. rGTVs were classified based on established spatial/dosimetric criteria.

Results: Forty patients treated between 2010-2020 formed …


Selective Inhibition Of Canonical Stat3 Signaling Suppresses K-Ras Mutant Lung Tumorigenesis And Reinvigorates Anti-Tumor Immunity, Michael J Clowers, Zahraa Rahal, Sung-Nam Cho, Avantika Krishna, Bo Yuan, Leticia G Hamana Zorrilla, T Kris Eckols, Moses M Kasembeli, Samuel Liu, Stephen Peng, Marco Ramos-Castaneda, Annamarie L Thompson, Carlos Ignacio Rodriguez Reyna, Katherine E Larsen, Maria T Grimaldo, Shanshan Deng, Nastaran Karimi, Cody Chou, Walter V Velasco, Melody Zarghooni, Sayan Alekseev, Luisa M Solis Soto, Edwin J Ostrin, Humam Kadara, Suhendan Ekmekcioglu, David J Tweardy, Seyed Javad Moghaddam Jan 2025

Selective Inhibition Of Canonical Stat3 Signaling Suppresses K-Ras Mutant Lung Tumorigenesis And Reinvigorates Anti-Tumor Immunity, Michael J Clowers, Zahraa Rahal, Sung-Nam Cho, Avantika Krishna, Bo Yuan, Leticia G Hamana Zorrilla, T Kris Eckols, Moses M Kasembeli, Samuel Liu, Stephen Peng, Marco Ramos-Castaneda, Annamarie L Thompson, Carlos Ignacio Rodriguez Reyna, Katherine E Larsen, Maria T Grimaldo, Shanshan Deng, Nastaran Karimi, Cody Chou, Walter V Velasco, Melody Zarghooni, Sayan Alekseev, Luisa M Solis Soto, Edwin J Ostrin, Humam Kadara, Suhendan Ekmekcioglu, David J Tweardy, Seyed Javad Moghaddam

Faculty, Staff and Student Publications

Introduction: K-ras mutant lung adenocarcinoma (KM-LUAD) is a difficult-to-treat cancer subtype in which chronic inflammation pervades the tumor immune microenvironment (TIME). Pro-inflammatory pathways dampen the response to treatments, including immune checkpoint inhibitors, necessitating therapies that target this inflammatory signaling network in the TIME. One of the lynchpins of chronic inflammation in KM-LUAD is signal transducer and activator of transcription 3 (STAT3).

Methods: Here, we tested the anti-tumor and early immunotherapeutic efficacy of TTI-101, a selective small-molecule inhibitor of canonical STAT3 signaling, in a K-rasG12D mutant lung cancer mouse model (CC-LR).

Results: Treatment of CC-LR mice with TTI-101 resulted in reduced …


Dedifferentiated Liposarcomas Treated With Immune Checkpoint Blockade: The Md Anderson Experience, Madeline B Torres, Cheuk Hong Leung, Marianne Zoghbi, Rossana Lazcano, Davis Ingram, Khalida Wani, Emily Z Keung, M Alejandra Zarzour, Christopher P Scally, Kelly K Hunt, Anthony Conley, Andrew J Bishop, B Ashleigh Guadagnolo, Ahsan Farooqi, Devarati Mitra, Alison K Yoder, Michael S Nakazawa, Dejka Araujo, Andrew Livingston, Ravin Ratan, Shreyaskumar Patel, Vinod Ravi, Alexander J Lazar, Christina L Roland, Neeta Somaiah, Elise F Nassif Haddad Jan 2025

Dedifferentiated Liposarcomas Treated With Immune Checkpoint Blockade: The Md Anderson Experience, Madeline B Torres, Cheuk Hong Leung, Marianne Zoghbi, Rossana Lazcano, Davis Ingram, Khalida Wani, Emily Z Keung, M Alejandra Zarzour, Christopher P Scally, Kelly K Hunt, Anthony Conley, Andrew J Bishop, B Ashleigh Guadagnolo, Ahsan Farooqi, Devarati Mitra, Alison K Yoder, Michael S Nakazawa, Dejka Araujo, Andrew Livingston, Ravin Ratan, Shreyaskumar Patel, Vinod Ravi, Alexander J Lazar, Christina L Roland, Neeta Somaiah, Elise F Nassif Haddad

Faculty, Staff and Student Publications

Background: Dedifferentiated liposarcoma (DDLPS) is one of the most common types of soft tissue sarcoma (STS) characterized by liposarcomatous differentiation and a predilection for the retroperitoneum. Despite the growing number of histology-specific immune checkpoint blockade (ICB) trials in STS, it is still difficult to identify the radiographic objective response rate (ORR) for DDLPS in the real world setting. This study aimed to evaluate the ORR and survival of patients with DDLPS treated with ICB at a single center.

Methods: We conducted a retrospective study of 31 patients with pathologically confirmed DDLPS treated with ICB at MD Anderson Cancer Center between …


A Plain Language Summary Of The Final Analysis Of The Griffin Study Of Daratumumab Plus Lenalidomide, Bortezomib, And Dexamethasone For People With Newly Diagnosed Multiple Myeloma, Peter M Voorhees, Douglas W Sborov, Jacob Laubach, Jonathan L Kaufman, Brandi Reeves, Cesar Rodriguez, Rebecca Silbermann, Luciano J Costa, Larry D Anderson, Nitya Nathwani, Nina Shah, Naresh Bumma, Yvonne A Efebera, Sarah A Holstein, Caitlin Costello, Andrzej Jakubowiak, Tanya M Wildes, Robert Z Orlowski, Kenneth H Shain, Andrew J Cowan, Shira Dinner, Katharine S Gries, Huiling Pei, Annelore Cortoos, Sharmila Patel, Thomas S Lin, Saad Z Usmani, Paul G Richardson Jan 2025

A Plain Language Summary Of The Final Analysis Of The Griffin Study Of Daratumumab Plus Lenalidomide, Bortezomib, And Dexamethasone For People With Newly Diagnosed Multiple Myeloma, Peter M Voorhees, Douglas W Sborov, Jacob Laubach, Jonathan L Kaufman, Brandi Reeves, Cesar Rodriguez, Rebecca Silbermann, Luciano J Costa, Larry D Anderson, Nitya Nathwani, Nina Shah, Naresh Bumma, Yvonne A Efebera, Sarah A Holstein, Caitlin Costello, Andrzej Jakubowiak, Tanya M Wildes, Robert Z Orlowski, Kenneth H Shain, Andrew J Cowan, Shira Dinner, Katharine S Gries, Huiling Pei, Annelore Cortoos, Sharmila Patel, Thomas S Lin, Saad Z Usmani, Paul G Richardson

Faculty, Staff and Student Publications

No abstract provided.


Grape-Pi: Graph-Based Neural Networks For Enhanced Protein Identification In Proteomics Pipelines, Chunhui Gu, Seyyed Mahmood Ghasemi, Yining Cai, Johannes F Fahrmann, James P Long, Hiroyuki Katayama, Chong Wu, Jody Vykoukal, Jennifer B Dennison, Samir Hanash, Kim-Anh Do, Ehsan Irajizad Jan 2025

Grape-Pi: Graph-Based Neural Networks For Enhanced Protein Identification In Proteomics Pipelines, Chunhui Gu, Seyyed Mahmood Ghasemi, Yining Cai, Johannes F Fahrmann, James P Long, Hiroyuki Katayama, Chong Wu, Jody Vykoukal, Jennifer B Dennison, Samir Hanash, Kim-Anh Do, Ehsan Irajizad

Faculty, Staff and Student Publications

Motivation: Protein identification via mass spectrometry (MS) is the primary method for untargeted protein detection. However, the identification process is challenging due to data complexity and the need to control false discovery rates (FDR) of protein identification. To address these challenges, we developed a graph neural network (GNN)-based model, Graph Neural Network using Protein-Protein Interaction for Enhancing Protein Identification (Grape-Pi), which is applicable to all proteomics pipelines. This model leverages protein-protein interaction (PPI) data and employs two types of message-passing layers to integrate evidence from both the target protein and its interactors, thereby improving identification accuracy.

Results: Grape-Pi achieved significant …


A Critical Assessment Of Artificial Intelligence In Magnetic Resonance Imaging Of Cancer, Chengyue Wu, Meryem Abbad Andaloussi, David A Hormuth, Ernesto A B F Lima, Guillermo Lorenzo, Casey E Stowers, Sriram Ravula, Brett Levac, Alexandros G Dimakis, Jonathan I Tamir, Kristy K Brock, Caroline Chung, Thomas E Yankeelov Jan 2025

A Critical Assessment Of Artificial Intelligence In Magnetic Resonance Imaging Of Cancer, Chengyue Wu, Meryem Abbad Andaloussi, David A Hormuth, Ernesto A B F Lima, Guillermo Lorenzo, Casey E Stowers, Sriram Ravula, Brett Levac, Alexandros G Dimakis, Jonathan I Tamir, Kristy K Brock, Caroline Chung, Thomas E Yankeelov

Faculty, Staff and Student Publications

Given the enormous output and pace of development of artificial intelligence (AI) methods in medical imaging, it can be challenging to identify the true success stories to determine the state-of-the-art of the field. This report seeks to provide the magnetic resonance imaging (MRI) community with an initial guide into the major areas in which the methods of AI are contributing to MRI in oncology. After a general introduction to artificial intelligence, we proceed to discuss the successes and current limitations of AI in MRI when used for image acquisition, reconstruction, registration, and segmentation, as well as its utility for assisting …


Disentangling Effects Of The Dr And Dq Isomers Encoded By The Hla Class Ii Haplotype Drb1*15:01/Dqb1*06:02 To Help Establish The True Risk Allele For Fviii Inhibitor Development In Hemophilia A, Vincent P Diego, Bernadette W Luu, Marcio A Almeida, Raja Rajalingam, Marco Hofmann, Jacob A Galan, Eron G Manusov, Jerry S Powell, Long V Dinh, Henry Mead, Huy Huynh, Anne M Verhagen, Juan M Peralta, Paul V Lehmann, Satish Kumar, Eli J Fine, Joanne E Curran, Harald H Goring, Miguel A Escobar, Sarah Williams-Blangero, Eugene Maraskovsky, John Blangero, Tom E Howard Jan 2025

Disentangling Effects Of The Dr And Dq Isomers Encoded By The Hla Class Ii Haplotype Drb1*15:01/Dqb1*06:02 To Help Establish The True Risk Allele For Fviii Inhibitor Development In Hemophilia A, Vincent P Diego, Bernadette W Luu, Marcio A Almeida, Raja Rajalingam, Marco Hofmann, Jacob A Galan, Eron G Manusov, Jerry S Powell, Long V Dinh, Henry Mead, Huy Huynh, Anne M Verhagen, Juan M Peralta, Paul V Lehmann, Satish Kumar, Eli J Fine, Joanne E Curran, Harald H Goring, Miguel A Escobar, Sarah Williams-Blangero, Eugene Maraskovsky, John Blangero, Tom E Howard

Faculty, Staff and Student Publications

Introduction: Hemophilia A (HA) patients (HAPs) with the human leukocyte antigen (HLA)-class-II (HLAII) haplotype DRB1*15:01/DQB1*06:02, and thus antigen presenting cells which express HLAII β-polypeptide chains that form heterodimers of DR15- and DQ6-serotypes, respectively, have an increased risk of developing factor (F)VIII inhibitors (FEIs)-neutralizing antibodies against the therapeutic-FVIII-proteins (tFVIIIs) infused to prevent/arrest bleeding. As DRB1*15:01 and DQB1*06:02 exist in strong linkage disequilibrium, association analysis cannot determine which is the actual risk allele.

Methods: To establish the true risk allele of this haplotype, we analyzed the tFVIII-derived peptides (tFVIII-dPs) bound to either the DR or DQ molecules that comprise the individual HLAII …


Inhibition Of Nitric Oxide Synthase Transforms Carotid Occlusion-Mediated Benign Oligemia Into De Novo Large Cerebral Infarction, Ha Kim, Jinyong Chung, Jeong Wook Kang, Dawid Schellingerhout, Soo Ji Lee, Hee Jeong Jang, Inyeong Park, Taesu Kim, Dong-Seok Gwak, Ji Sung Lee, Sung-Ha Hong, Kang-Hoon Je, Hee-Joon Bae, Joohon Sung, Eng H Lo, James Faber, Cenk Ayata, Dong-Eog Kim Jan 2025

Inhibition Of Nitric Oxide Synthase Transforms Carotid Occlusion-Mediated Benign Oligemia Into De Novo Large Cerebral Infarction, Ha Kim, Jinyong Chung, Jeong Wook Kang, Dawid Schellingerhout, Soo Ji Lee, Hee Jeong Jang, Inyeong Park, Taesu Kim, Dong-Seok Gwak, Ji Sung Lee, Sung-Ha Hong, Kang-Hoon Je, Hee-Joon Bae, Joohon Sung, Eng H Lo, James Faber, Cenk Ayata, Dong-Eog Kim

Faculty, Staff and Student Publications

No abstract provided.


A Call For Integration Of Trauma-Informed Care Into Occupational Therapy: Improving Provider Competency Through A Case Study Of A Cooking Skills Program For Survivors Of Human Trafficking, Natalie Pravinkumar Jan 2025

A Call For Integration Of Trauma-Informed Care Into Occupational Therapy: Improving Provider Competency Through A Case Study Of A Cooking Skills Program For Survivors Of Human Trafficking, Natalie Pravinkumar

OT Doctoral Capstones

Trauma, such as abuse, neglect, and violence, has evident lasting physical and mental health effects, such as chronic illness, behavioral changes, and depression. While trauma-informed care (TIC) helps providers recognize and respond to trauma, this training is often limited to mental health and social work fields. Many survivor populations never receive interventions designed with TIC in mind, restricting outcomes leading to reduced rehabilitation and reintegration.

Occupational therapy (OT) is fundamentally client-centered and functional, making it well suited for TIC. However, while they cover many similar topics, most OT programs do not include specific curriculum on TIC.

TIC education in OT …


Trends In Contacts Made By Immigrants To The National Domestic Violence Hotline, Before And During The Covid-19 Pandemic, Sarah Treves-Kagan, Vi D Le, Liris S Berra, Colleen M Ray, Yanet Ruvalcaba, Leila Wood, Denise V D'Angelo, Tatiana M Vera, Lianne Fuino Estefan Jan 2025

Trends In Contacts Made By Immigrants To The National Domestic Violence Hotline, Before And During The Covid-19 Pandemic, Sarah Treves-Kagan, Vi D Le, Liris S Berra, Colleen M Ray, Yanet Ruvalcaba, Leila Wood, Denise V D'Angelo, Tatiana M Vera, Lianne Fuino Estefan

Faculty, Staff and Student Publications

Objectives: Immigrants in the United States are more likely than nonimmigrants to experience risk factors for intimate partner violence (IPV) and problems in getting support. The COVID-19 pandemic and recent incidents of xenophobia and anti-immigrant sentiment may have exacerbated exposure to IPV risk factors. We examined immigrant experiences of IPV before and during the COVID-19 pandemic.

Methods: This study identified changes in characteristics of abuse, services used, referrals, and barriers to services among those who contacted the National Domestic Violence Hotline (NDVH) and identified as immigrants, reported immigration status as a concern, needed immigration support, and/or identified immigration status as …


Caring For Caregivers: An Occupational Therapy-Centered Mental Health And Wellness Program, Natalie Burgess Jan 2025

Caring For Caregivers: An Occupational Therapy-Centered Mental Health And Wellness Program, Natalie Burgess

OT Doctoral Capstones

Objective: Address the mental health and wellness needs of caregivers of individuals with disabilities at Fundación Integra A.C.

Methods: Conducted a needs assessment, developed and implemented an 8-week occupational therapy-based wellness program, and evaluated outcomes using pre/post assessments and weekly feedback surveys.

Results: Caregivers showed reduced stress, improved self-reported health, and increased use of mindfulness and coping strategies.

Conclusion: Occupational therapy interventions can improve caregiver well-being and support sustainable caregiver education in community settings.


Testosterone Plus Lifestyle Therapy Improves Skeletal Muscle Glycolysis In Older Men With Obesity And Hypogonadism, Viola Viola, Marlene Aguilar, Maria Liza Duremdes Nava, Alessandra Celli, Reina Armamento-Villareal, Yoann Barnouin, Nicola Napoli, Nagireeddy Putluri, Clifford Qualls, Dennis T Villareal Jan 2025

Testosterone Plus Lifestyle Therapy Improves Skeletal Muscle Glycolysis In Older Men With Obesity And Hypogonadism, Viola Viola, Marlene Aguilar, Maria Liza Duremdes Nava, Alessandra Celli, Reina Armamento-Villareal, Yoann Barnouin, Nicola Napoli, Nagireeddy Putluri, Clifford Qualls, Dennis T Villareal

Faculty, Staff and Students Publications

Objective: Weight loss in older men with obesity and hypogonadism accelerates musculoskeletal decline, yet the underlying metabolic mechanisms remain unclear. Testosterone replacement therapy (TRT), when added to lifestyle therapy (LT), mitigates this decline, but its metabolic basis has not been defined. We examined skeletal muscle metabolomic adaptations to LT with or without TRT, focusing on glycolysis, the pentose phosphate pathway (PPP), the tricarboxylic acid (TCA) cycle, and carnitine metabolism to identify dominant pathways of metabolic adaptation.

Design: Randomized, double-blind, placebo-controlled trial (LITROS).

Methods: Eighty-three men aged 65 years or older with obesity (BMI ≥30 kg/m2), hypogonadism (testosterone < 10.4 nmol/L), and frailty (Physical Performance Test score ≤31) were randomized to 26 weeks of LT plus TRT (LT+TRT) or LT plus placebo (LT+Pbo). A metabolomic substudy was performed in 44 participants, who underwent serial biopsies of the vastus lateralis for targeted LC-MS/MS analysis of intermediates in glycolysis, PPP, TCA cycle, and carnitine metabolism.

Results: Among the …


Skewed Adaptive Immune Responses Are Involved In Alpha-1 Antitrypsin Deficiency Emphysema, Joselyn Rojas-Quintero, Scott A Ochsner, Hyun-Sung Lee, Christine Cong, Alan Waich Cohen, Adrianne S Colborg, Konstantin Tsoyi, Maria C Basil, Edward Cantu, Ivan O Rosas, Neil J Mckenna, Raúl San-José Estépar, Igor Barjaktarevic, Andrew A Wilson, Francesca Polverino Jan 2025

Skewed Adaptive Immune Responses Are Involved In Alpha-1 Antitrypsin Deficiency Emphysema, Joselyn Rojas-Quintero, Scott A Ochsner, Hyun-Sung Lee, Christine Cong, Alan Waich Cohen, Adrianne S Colborg, Konstantin Tsoyi, Maria C Basil, Edward Cantu, Ivan O Rosas, Neil J Mckenna, Raúl San-José Estépar, Igor Barjaktarevic, Andrew A Wilson, Francesca Polverino

Faculty, Staff and Students Publications

No abstract provided.


Advancing Narcolepsy Advocacy: Bridging Patient Narratives And Systemic Change, Ahmed Salem Bahammam, Lindsay Jesteadt, Hamza Dhafar, Amir Sharafkhaneh Jan 2025

Advancing Narcolepsy Advocacy: Bridging Patient Narratives And Systemic Change, Ahmed Salem Bahammam, Lindsay Jesteadt, Hamza Dhafar, Amir Sharafkhaneh

Faculty, Staff and Students Publications

We introduce the Stigma-to-Structure Advocacy Framework, a novel, evidence-based model designed to transform narcolepsy advocacy by systematically bridging patient narratives with structural change. Narcolepsy remains a profoundly underdiagnosed and misunderstood neurological disorder, with persistent diagnostic delays and pervasive cultural stigma undermining patient well-being and access to care. Despite recent progress in awareness and support, advocacy efforts remain fragmented and insufficiently integrated with health policy, particularly in low- and middle-income countries. This perspective advances a strategic evolution of narcolepsy advocacy through the Stigma-to-Structure Advocacy Framework, which is anchored in three pillars: narrative-driven awareness, clinical system integration, and policy activation. Drawing on …


Reversible Degradation Of Peptidoglycan By Lytic Transglycosylases, Aaron Devereaux Jan 2025

Reversible Degradation Of Peptidoglycan By Lytic Transglycosylases, Aaron Devereaux

Theses and Dissertations (Comprehensive)

Antimicrobial resistance continues to be a burden on the global healthcare system with an estimated cost of billions of dollars and millions of deaths each year. Recently, there has been little to no development on new antibiotics to treat bacterial infection, and any that are developed become resisted to within a few years. Both Gram-positive and Gram-negative bacteria contain a mesh-like layer called peptidoglycan (PG) that surrounds their cells providing strength, cell shape, and protection from their environments. This layer is a polymer of N-acetylmuramic acid (MurNAc) and N-acetylglucosamine (GlcNAc) connected via a b-1,4-glycosidic bond, with each strand being cross-linked …


“It Is Tiny And It Is Everything”: Exploring The Effects Of Arts-Integrated Gardening On Experiences Of Ecological Grief Through Autoethnographic Research, Christina Kingsbury Jan 2025

“It Is Tiny And It Is Everything”: Exploring The Effects Of Arts-Integrated Gardening On Experiences Of Ecological Grief Through Autoethnographic Research, Christina Kingsbury

Theses and Dissertations (Comprehensive)

This study explores how arts-integrated gardening affects experiences of ecological grief through autoethnography and draws on my personal experiences as a survivor of environmentally linked cancer and artist working with gardens through social practice. My research builds on two areas of emergent scholarship—investigations of ecological grief and gardens as sites for social work practice—to explore how social work may address ecological grief through arts-integrated gardening. I use a quilting autoethnography as a method of inquiry to foreground my subjective knowledge and analyze it through intersectional feminist, disability and decolonizing theories. By incorporating narrative analysis and arts-based inquiry—writing in place, poetic …


Evaluation Of The Dnazyme Gr5 For The Determination Of Lead Speciation In Natural Waters, Gaganprit Gill Jan 2025

Evaluation Of The Dnazyme Gr5 For The Determination Of Lead Speciation In Natural Waters, Gaganprit Gill

Theses and Dissertations (Comprehensive)

This thesis explores the development and application of a DNAzyme-based biosensor designed to detect labile metal species in environmental samples. Real time and on-site monitoring of labile metal fractions would make a valuable contribution to environmental management, as these fractions are the most bioavailable and pose significant toxicity risks to aquatic organisms. Conventional methods for detecting labile metals, while effective, are often burdened by high costs, complexity, and lengthy processing times, making them less ideal for rapid and widespread environmental assessments.

The first manuscript of this thesis (chapter 2) establishes the fundamental capabilities of the Pb2+-specific DNAzyme GR5 …


Development Of A Stress Response Framework For Understanding Sogie Refugee Health, Arooran Saravanan Ananthavel Murugan Jan 2025

Development Of A Stress Response Framework For Understanding Sogie Refugee Health, Arooran Saravanan Ananthavel Murugan

Theses and Dissertations (Comprehensive)

As an increasing number of individuals flee persecution on the basis of sexual orientation and gender identity expression (SOGIE), Canada has become a prominent destination for SOGIE refugees. The chronic stressors encountered by this marginalized population remain insufficiently studied, particularly in relation to physical health outcomes. This qualitative study investigates the cumulative health impacts of chronic stress among SOGIE refugees through the application of a cell-to-society framework, underpinned by Minority Stress Theory (MST). The study seeks to develop a SOGIE-specific stress response framework that theorizes the processes by which social and environmental stressors become biologically embedded, thereby contributing to elevated …


Neighbourhood Resilience Planning With Renters In Hamilton, Ontario, Canada, Anna Do Jan 2025

Neighbourhood Resilience Planning With Renters In Hamilton, Ontario, Canada, Anna Do

Theses and Dissertations (Comprehensive)

This sequential mixed-methods study demonstrates the co-production of knowledge between academic researchers and local communities. Guided by the resilience planning framework, the study engaged 48 renters from the Beasley neighbourhood of Hamilton, Ontario, Canada in identifying stressful and supportive locations using a participatory mapping tool called the “Place Report.” A total of 74 Place Reports were submitted, with most reporting supportive places in or near Beasley. Thematic analysis revealed three overarching domains, and 13 themes related to the use and function of these locations. Places pertaining to food, housing, and physical activity emerged as the most frequently discussed topics. The …


Limiting H1n1 Replication Via The Dsrnai Pathway Using Sequence-Specific Ldsrna, Shawn Marie Sharon Carr, Stephanie Dewitte-Orr Jan 2025

Limiting H1n1 Replication Via The Dsrnai Pathway Using Sequence-Specific Ldsrna, Shawn Marie Sharon Carr, Stephanie Dewitte-Orr

Theses and Dissertations (Comprehensive)

The seasonal influenza virus causes a common respiratory illness that can be life threatening to the immunocompromised, the very young, and the elderly. The current strategies for avoiding a serious influenza virus infection are good hygiene practices and the annual influenza vaccine. Unfortunately, last year’s influenza virus vaccine effectiveness ranged between 32-60% for children and adolescents and 46-54% for adults. These low efficacy rates are due to the vaccine often targeting hemagglutinin, a highly variable surface protein. This thesis seeks to create a prophylactic treatment via the RNA interference (RNAi) response that targets the virus’s conserved genes that are integral …


Immune Pathway Modulation In Melanoma Using Chitosan Nanoparticle-Mediated Dsrna Delivery, Bethel C. Iwuji Jan 2025

Immune Pathway Modulation In Melanoma Using Chitosan Nanoparticle-Mediated Dsrna Delivery, Bethel C. Iwuji

Theses and Dissertations (Comprehensive)

Cancer is a group of diseases characterized by abnormal and uncontrolled cell division, which typically results in the formation of tumours. Even with advances in treatments, cancer remains one of the leading causes of death globally. Melanoma is an aggressive form of skin cancer which is highly malignant, develops in the pigment-producing cells of the skin, melanocytes, and in the late stages of the disease poses a significant challenge for therapeutic intervention due to its multidrug resistance. The innate immune system is the first line of defence against invading pathogens, including viruses, bacteria, and fungi, and can recognize and destroy …


Exploring The Reassessment Of Palliative Home Care Clients: A Mixed Methods Study, Maya Canham Jan 2025

Exploring The Reassessment Of Palliative Home Care Clients: A Mixed Methods Study, Maya Canham

Theses and Dissertations (Comprehensive)

Introduction: The timely reassessment of clients receiving palliative home care (HC) is critical for supporting clinicians with care planning and service delivery. However, there is little information on the frequency of reassessments and factors driving reassessment in palliative HC clients.

Objectives: The objectives of this study were to: (i) determine the proportion of palliative HC clients reassessed with the interRAI Palliative Care (interRAI PC) instrument, (ii) calculate the average interRAI PC reassessment interval, (iii) identify the key factors driving interRAI PC reassessment at various intervals, and (iv) explore the factors that influence palliative HC clinicians to reassess their clients in …


The Association Of Hyperhomocysteinemia (Hhcy) With Cancer Risk: An Updated Systematic Review And Meta-Analysis Of Case-Control Studies (2013-2024), Hajar Heidari Jan 2025

The Association Of Hyperhomocysteinemia (Hhcy) With Cancer Risk: An Updated Systematic Review And Meta-Analysis Of Case-Control Studies (2013-2024), Hajar Heidari

Electronic Theses & Dissertations (2024 - present)

Abstract:

Cancer continues to be one of the leading causes of morbidity and mortality globally, influenced by a complex interplay of genetic, environmental, and nutritional factors. Among these, the metabolism of homocysteine (HCY), a sulfur-containing amino acid derived from dietary methionine, has attracted growing attention due to its involvement in one-carbon metabolism and its potential link to cancer. Elevated HCY levels, a condition known as hyperhomocysteinemia (HHCY), have been shown to disrupt crucial cellular processes such as DNA methylation and promote oxidative stress (OS)—both of which contribute to genomic instability and cancer progression. Disruptions in the folate and methionine cycles, …


A Structurationally Informed View Of Emergency Medical Services Professionals’ Work-Related Communication And Behaviors While Off Duty, Susan J. Burnett Jan 2025

A Structurationally Informed View Of Emergency Medical Services Professionals’ Work-Related Communication And Behaviors While Off Duty, Susan J. Burnett

Electronic Theses & Dissertations (2024 - present)

Work-life interrelationships and boundaries are common areas of study in communication research. While some scholars maintain that the domains of work and personal lives and their boundaries are static and exist in designated times and spaces, others argue that domains are constructed around situated contexts and through the performance of situated activities that not only produce a time and place for the domain but call upon enactment of an identity appropriate for managing the domain and the boundaries around it. The people who work in emergency medical services (EMS), emergency medical services professionals (EMSPs) face special challenges in managing work-life …


Risk Factors For Executive Functioning Development In Preschool Children With Type 1 Diabetes, Victoria L. Ledsham Jan 2025

Risk Factors For Executive Functioning Development In Preschool Children With Type 1 Diabetes, Victoria L. Ledsham

Electronic Theses & Dissertations (2024 - present)

Links between Type 1 diabetes (T1D) and decreased cognitive functioning in children are well documented, but research on executive functioning (EF) in this population is more limited. Multiple T1D-related risk factors (e.g., hypoglycemia, hyperglycemia, glycemic variability, diabetic ketoacidosis) for EF have been established throughout the literature, but their individual effects have been difficult to determine given their interrelated nature. In result, cumulative risk has been proposed as a more robust predictor of EF differences in children with T1D. Moreover, despite the importance of early T1D onset as a risk factor for EF impairment, no studies have previously investigated EF in …


Synthesis Of Small Molecules As Therapeutic Candidates, Savia Boyer Jan 2025

Synthesis Of Small Molecules As Therapeutic Candidates, Savia Boyer

Electronic Theses & Dissertations (2024 - present)

RNA plays a critical role in many biological functions, such as normal cellular functions or disease-related processes. Regulating biological processes through RNA-based therapeutics can be employed by the reversible photoregulation of oligonucleotides. Azobenzene, a light-responsive compound that changes conformation when exposed to ultraviolet (UV) or visible light, is attached to cytidine phosphoramidite to be incorporated in a series of RNA oligonucleotides. The reversibility of the nucleoside and oligonucleotide is verified through UV melting point experiments. The modified oligonucleotide can change conformation upon light irradiation to stop reverse transcription (RT) in the presence of many different reverse transcriptase enzymes. This technique …