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2019

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Articles 7471 - 7500 of 16116

Full-Text Articles in Medicine and Health Sciences

Northern New England Palliative Care Teleconsult Research Laboratory, Ava Daruvala, Rebecca N. Hutchinson, Eric Anderson, Paul Han May 2019

Northern New England Palliative Care Teleconsult Research Laboratory, Ava Daruvala, Rebecca N. Hutchinson, Eric Anderson, Paul Han

MaineHealth Maine Medical Center

Introduction:

• Palliative care (PC) is an approach that improves the quality of life of patients and their families.

• Delivery of PC via telehealth technology (tele-PC) has been proposed as a solution to increase access to PC in rural areas. • The feasibility, acceptability, and effectiveness of applying telehealth technology to PC remains unknown.

• The overarching purpose of the proposed study is to 1) evaluate the feasibility and acceptability of a tele-PC intervention for seriously ill patients, and 2) generate pilot data to better understand provider-patient communication during tele-PC consultations


Increasing Doses Of Intraoperative Hydromorphone Do Not Reduce Postoperative Pain, Craig S. Curry, Michael B. Henry, Wendy Craig, Janelle M. Richard, Denham S. Ward May 2019

Increasing Doses Of Intraoperative Hydromorphone Do Not Reduce Postoperative Pain, Craig S. Curry, Michael B. Henry, Wendy Craig, Janelle M. Richard, Denham S. Ward

MaineHealth Maine Medical Center

Introduction:

• Intermediate and long acting opioids are given intraoperatively to reduce pain during emergence from anesthesia.

• Recent evidence suggests that intraoperative opioids have inconsistent effects on nociception and pain in the immediate postoperative period.

• Multiple potent, short-acting opioids such as remifentanil, sufentanil and fentanyl have been shown to produce dose-related increases in pain scores and opioid consumption in the immediate postoperative recovery period.

• Intraoperative doses of longer acting opioids such as morphine and methadone6 have been shown to reduce pain scores and narcotic requirements in the immediate postoperative period.

• Hydromorphone is an intermediate duration narcotic …


Analysis Of Anti-Diabetic Exosomes Secreted From Beige Adipocytes, Rachelle Mendola, Chad Doucette, Daniel Nguyen, Su Su, Aaron Brown May 2019

Analysis Of Anti-Diabetic Exosomes Secreted From Beige Adipocytes, Rachelle Mendola, Chad Doucette, Daniel Nguyen, Su Su, Aaron Brown

MaineHealth Maine Medical Center

Accumulation of excess fat in white adipose tissue is associated with an increase in risk for type 2 diabetes. Within white fat tissue resides a population of “beige” adipocytes that are activated by cold exposure and expend energy contained in fats, which is released as heat. Increasing energy expenditure through beige adipocyte activation has been shown to reduce diabetic symptoms in rodent models of obesity. However, activation of beige adipocytes through exposure of humans to cold temperatures is uncomfortable and likely not a realistic strategy to control body weight. In addition to its fat burning potential, secreted factors derived from …


Potential Of Vascular Endothelial Growth Factor As A Biomarker Of Coronary Artery Disease In Subjects Undergoing Cabg Surgery, Teaka Jackson, Sarah Peterson, Amanda Favreau-Lessard, Joanne Burgess, Susan Bosworth-Farrell, Robert S. Kramer, Douglas B. Sawyer, Sergey Ryzhov, Michael P. Robich May 2019

Potential Of Vascular Endothelial Growth Factor As A Biomarker Of Coronary Artery Disease In Subjects Undergoing Cabg Surgery, Teaka Jackson, Sarah Peterson, Amanda Favreau-Lessard, Joanne Burgess, Susan Bosworth-Farrell, Robert S. Kramer, Douglas B. Sawyer, Sergey Ryzhov, Michael P. Robich

MaineHealth Maine Medical Center

Introduction:

• Coronary artery disease (CAD) causes local hypoxia due to reduced blood flow

• Hypoxic conditions are known to induce vascular endothelial growth factor (VEGF) production, a key contributor to angiogenesis

• The purpose of this study was to determine the potential of VEGF as a marker of myocardial stress in subjects with CAD undergoing coronary artery bypass grafting (CABG) surgery


The Functional Food Diet: A Pilot Study, Caroline Knight, Ralph Hamill May 2019

The Functional Food Diet: A Pilot Study, Caroline Knight, Ralph Hamill

MaineHealth Maine Medical Center

Background: Recently, several functional foods have been identified which have health benefits beyond providing energy and substrate molecules for cellular chemistry. These foods are effective in reducing fat absorption and lowering lowdensity lipoprotein (LDL) cholesterol (Asgary, Rasquar, & Keshvari, 2018). In the past, diets low in saturated fat have been found to be ineffective in lowering LDL cholesterol. Statins are capable of lowering LDL cholesterol up to 60% when the latest generation is used at maximal dose (Law, Wald & Rudnicka, 2003). However, some patients do not tolerate statins because of side effects. Evidently, decreasing the LDL lowers the risk …


The Relationship Between Uncertainty Tolerance And Oncologists’ Perceptions Of Large-Panel Genomic Tumor Testing, Eric Anderson, Alexandra Hinton, Christine Lary, Kimberly Murray, Leo Waterson, Paul Han, Maine Cancer Genomics Initiative May 2019

The Relationship Between Uncertainty Tolerance And Oncologists’ Perceptions Of Large-Panel Genomic Tumor Testing, Eric Anderson, Alexandra Hinton, Christine Lary, Kimberly Murray, Leo Waterson, Paul Han, Maine Cancer Genomics Initiative

MaineHealth Maine Medical Center

Introduction:

Large-panel genomic tumor testing (GTT) is a new technology that promises to make cancer treatment more precise, but that currently poses many uncertainties regarding its clinical value and appropriate use. Uncertainty Tolerance (UT), a psychological construct that describes trait-level differences in individuals’ responses to uncertainty, may influence oncologists’ perceptions and attitudes regarding GTT.


Community Oncology Clinicians’ Knowledge, Beliefs, And Attitudes Regarding Genomic Tumor Testing, Eric Anderson, Alexandra Hinton, Kimberly Murray, Hayley Mandeville, Caitlin Gutheil, Leo Waterston, Lee Lucas, Christine Duarte, Christian Thomas, Susan Miesfeldt, Petra Helbig, Andrey Antov, Jens Rueter, Paul Han May 2019

Community Oncology Clinicians’ Knowledge, Beliefs, And Attitudes Regarding Genomic Tumor Testing, Eric Anderson, Alexandra Hinton, Kimberly Murray, Hayley Mandeville, Caitlin Gutheil, Leo Waterston, Lee Lucas, Christine Duarte, Christian Thomas, Susan Miesfeldt, Petra Helbig, Andrey Antov, Jens Rueter, Paul Han

MaineHealth Maine Medical Center

Introduction: Genomic tumor testing (GTT) is a new technology that promises to make cancer treatment more precise. However, little is known about clinicians’ knowledge, beliefs, and attitudes regarding GTT, particularly in community oncology settings.


Outpatient Treatment Of Pulmonary Embolism: A Single-Center Case Series, Annie Huyler, Casey Z. Macvane, Andrew Perron, Tania D Strout May 2019

Outpatient Treatment Of Pulmonary Embolism: A Single-Center Case Series, Annie Huyler, Casey Z. Macvane, Andrew Perron, Tania D Strout

MaineHealth Maine Medical Center

Background: Pulmonary embolus (PE) is associated with significant utilization of health care resources and financial burden Several additions that have allowed us to look at safely treating patients with PEs as outpatients:

• Simplified Pulmonary Embolism Severity Index (sPESI) -Risk stratifies patients based on their age, vital signs, and past medical history

• Novel oral anticoagulants

Primary Objective: To describe the population, treatment strategies, short-term complications and outcomes associated with outpatient management of PE following treatment in the ED.


Impact Of Palliative Care Consultations For Patients Admitted To Maine Medical Center With Acute Exacerbations Of Copd, Benjamin Jarrett, Isabella Strumpf, Rebecca Hutchinson May 2019

Impact Of Palliative Care Consultations For Patients Admitted To Maine Medical Center With Acute Exacerbations Of Copd, Benjamin Jarrett, Isabella Strumpf, Rebecca Hutchinson

MaineHealth Maine Medical Center

Background and purpose:

• COPD is the 3rd leading cause of death.

• Specialty Palliative Care (PC) is underutilized in COPD patients.

•PC involvement has been shown to improve quality of life and satisfaction with overall care.

• We sought to evaluate the association of receipt of palliative medicine consultation during an admission for acute exacerbation of COPD with a documented Goals of Care conversations and/or presence of an advanced directive and/or POLST.


Seerratus Anterior Plane Block (Sapb) Improves Paine Control In Rib Fractures, Randy Kring, Peter Croft, David Mackenzie, Christina Wilson, Joseph Rappold, Tania D. Strout May 2019

Seerratus Anterior Plane Block (Sapb) Improves Paine Control In Rib Fractures, Randy Kring, Peter Croft, David Mackenzie, Christina Wilson, Joseph Rappold, Tania D. Strout

MaineHealth Maine Medical Center

Background:

•Trauma is a major cause of morbidity and mortality worldwide. Rib fractures are identified in at least 10% of all injured patients.

•Rib fractures can lead to significant respiratory complications, with pneumonia and respiratory failure occurring in up to 31% of patients with rib fractures. Early initiation of aggressive pain control and pulmonary hygiene with incentive spirometry are standard of care to prevent complications from developing.

•In the Emergency Department, patients with rib fractures typically receive systemic analgesia that is largely narcotic-based. This pain control strategy puts patients at risk for the side effects of narcotics such as constipation, …


What’S Happening To Our Patients In Their Final Year Of Life?, Teresa Letellier, Amy Haskins, Christina Holt May 2019

What’S Happening To Our Patients In Their Final Year Of Life?, Teresa Letellier, Amy Haskins, Christina Holt

MaineHealth Maine Medical Center

We want to “die well” which includes:

• Effective symptom management

• Receiving care consistent with wishes Who achieves this, and how?

• Primary care physicians (PCPs) – Insufficient time and training

• Palliative care physicians – Better quality care and decreased health care cost in last years of life

• “Surprise Question” – “Would you be surprised if this patient dies in the next year?”

• To recognize our sickest patients and discuss goals of care and consult palliative care, if appropriate • “Advance care planning tab” – To record code status, advance directive, POLST forms, medical power of …


Validity Of Neonatal Poc Glucose Testing, Matthew Turnquist, Amy Haskins, Christina Holt May 2019

Validity Of Neonatal Poc Glucose Testing, Matthew Turnquist, Amy Haskins, Christina Holt

MaineHealth Maine Medical Center

Background:

Glucose monitoring a common invasive intervention in newborn period

•most commonly obtained laboratory value

Appropriate identification of hypoglycemia is critical:

•Severe hypoglycemia can lead to neurologic insult

•Cerebral palsy, developmental delay, seizures, death


Feasibility Of Pre-Operative Mtor Inhibitor Sirolimus In Children And Young Adults With Desmoid Tumor, Stephanie Verwys, Clara Magyar, Kathleen Glick, Douglas Hawkins, Archana Sharma, Brenda Weigel, Katherine Chastain, Joseph Khoury, Michele Manalang, Sarah Dry, Noah Federman, Aaron Weiss May 2019

Feasibility Of Pre-Operative Mtor Inhibitor Sirolimus In Children And Young Adults With Desmoid Tumor, Stephanie Verwys, Clara Magyar, Kathleen Glick, Douglas Hawkins, Archana Sharma, Brenda Weigel, Katherine Chastain, Joseph Khoury, Michele Manalang, Sarah Dry, Noah Federman, Aaron Weiss

MaineHealth Maine Medical Center

Background:

• Desmoid tumor represents an intermediate grade neoplasm with a striking predilection for locally invasive growth and recurrence following resection

• More effective, well-tolerated non-surgical treatment options are needed

• Current approaches

• If feasible, watchful waiting is the preferred approach

• 20-30% spontaneous regression

• In situations where treatment is indicated, the following approaches are utilized

• Surgery is the primary approach if minimal morbidity is anticipated

• Medical therapies

• Cytotoxic drugs

• Tyrosine kinase inhibitors

• Hydroxyurea

• Gamma secretase inhibitors

• mTOR Inhibitor Rationale

• Desmoid tumor is well-known to be associated with deregulation of …


Physician-Patient Communication About Genomic Tumor Testing: Perceptions Of Oncology Providers, Hayley Mandeville, Eric Anderson, Kimberly Murray, Caitlin Gutheil, Leo Waterston, Lee Lucas, Christine Duarte, Christian Thomas, Susan Miesfeldt, Petra Helbig, Andrey Antov, Jens Rueter, Paul Han May 2019

Physician-Patient Communication About Genomic Tumor Testing: Perceptions Of Oncology Providers, Hayley Mandeville, Eric Anderson, Kimberly Murray, Caitlin Gutheil, Leo Waterston, Lee Lucas, Christine Duarte, Christian Thomas, Susan Miesfeldt, Petra Helbig, Andrey Antov, Jens Rueter, Paul Han

MaineHealth Maine Medical Center

Background:

• Genomic tumor testing (GTT) is a new technology and a cornerstone of the “precision medicine” movement in cancer care.

• GTT uses next-generation genome sequencing technology to identify somatic variants in tumor cells.

• By identifying somatic variants that predict responses to cancer therapies, GTT can help tailor therapy to individual patients, making them more effective.

• However, due to the fact that GTT also detects many variants of uncertain significance, its clinical value is currently unproven.

• When using GTT, physicians counsel patients about both its benefits and its limitations, but the ideal goals and content of …


Identifying Youth At Clinical High Risk: What’S The Emotional Impact?, K A. Woodberry, K S. Powers, C Bryant, D Downing, M Verdi, L Kennedy, D I. Shapiro, R Girgis, G Brucato, D Huang, F M. Crump, C M. Corcoran, L I. Seidman, B Link, W R. Mcfarlane, L Yang May 2019

Identifying Youth At Clinical High Risk: What’S The Emotional Impact?, K A. Woodberry, K S. Powers, C Bryant, D Downing, M Verdi, L Kennedy, D I. Shapiro, R Girgis, G Brucato, D Huang, F M. Crump, C M. Corcoran, L I. Seidman, B Link, W R. Mcfarlane, L Yang

MaineHealth Maine Medical Center

Background:

Early intervention in major mental illness promises to improve the lives of those identified.

• But could identifying youth as at clinical high risk (CHR) for psychosis also do harm given that the majority never develop a psychotic disorder?

• Could telling someone they are at risk for psychosis activate internalized stigma that has been associated with increased emotional distress, social withdrawal, non-engagement in treatment, and suicide risk in CHR youth?

• Within the context of a larger study of stigma in CHR, we compared emotional responses to the CHR concept assessed before and after clinical feedback by study …


Getting Personal With Dementia: Physician Assistant Student Virtual Reality Immersion, Diane Visich, Dana Vilmore, Elizabeth Dyer May 2019

Getting Personal With Dementia: Physician Assistant Student Virtual Reality Immersion, Diane Visich, Dana Vilmore, Elizabeth Dyer

MaineHealth Maine Medical Center

Introduction:

Approximately 5.7 million people in the United States are living with dementia, with numbers expected to rise to 13.8 million by 2050 As prevalence grows, it is crucial to train future providers to meet the complex and diverse needs of patients and caregivers. Virtual reality (VR) is a growing tool in medical education, but few studies explore this tool for dementia education. One study found VR had a positive impact on medical and pharmacy students’ knowledge and attitudes toward people with dementia.Another study found VR increased the understanding and empathy in medical and physician assistant (PA) students for adults …


Prions To Pathways: Safeguarding Against Creutzfeldt-Jakob Disease In The Operating Room, Jessica Mary Adams Atkinson, Sonja Carol Orff May 2019

Prions To Pathways: Safeguarding Against Creutzfeldt-Jakob Disease In The Operating Room, Jessica Mary Adams Atkinson, Sonja Carol Orff

MaineHealth Maine Medical Center

Introduction:

As defined by the Center for Disease Control (CDC, 2018), Creutzfeldt-Jakob Disease (CJD) is a rapidly progressive, rare, transmissible, and fatal illness. Miscoiling of healthy proteins caused by an abnormal isoform of cellular glycoprotein resulting in protein folding has been found to be the molecular mechanism during the pathological process of this malady (Figure 1), (Castle, Gill, 2017). The current problem is that few recommendations are available for organizations to consider how to manage potential CJD patient cases, and institutions are left to compile and develop their own guidelines and/or protocols for clinical practice. The standards of care for …


Reducing Catheter Associated Urinary Tract Infections (Cauti) By Decreasing Use Of Indwelling Catheters, Joanne Chapman, Brenda Clark, Brian Jumper, Carrie Strick May 2019

Reducing Catheter Associated Urinary Tract Infections (Cauti) By Decreasing Use Of Indwelling Catheters, Joanne Chapman, Brenda Clark, Brian Jumper, Carrie Strick

MaineHealth Maine Medical Center

Background:

Catheter Associated Urinary Tract Infections (CAUTI) are considered a preventable hospital-acquired infection [2]. Centers for Medicaid and Medicare no longer reimburse hospitals for preventable CAUTIs [2]. A concerted effort to decrease our indwelling urinary catheter (IUC) rate has led to a decrease in the number of infections related to these catheters at Maine Medical Center (MMC) in Portland, Maine. Starting in 2012 as a result of The Joint Commission National Patient Safety Goal, the inter-professional CAUTI committee focus has been on decreasing utilization of IUC[1]. After an initial large decrease in utilization, the rates have flattened. The effort over …


Outcomes Of Implementation Of An Evidence-Based Enteral Feeding Protocol In Neonates Weighing Less Than 1800g At Birth, Rebecca Edwards May 2019

Outcomes Of Implementation Of An Evidence-Based Enteral Feeding Protocol In Neonates Weighing Less Than 1800g At Birth, Rebecca Edwards

MaineHealth Maine Medical Center

Background:

Several studies have demonstrated that the implementation of standardized enteral feeding guidelines can lead to positive outcomes in the neonatal intensive care unit (NICU), including improved nutrition, decreased need for parenteral nutrition (PN), central lines and decreased costs. Furthermore, implementation of standard feeding regimens have significantly reduced the incidence of necrotizing enterocolitis (NEC), a devastating gastrointestinal emergency in neonates. It has been reported that NEC has an iatrogenic component related to variations in feeding practices. While the exact mechanism of the reduced risk of NEC and implementation of feeding protocols is unclear, standard feeding regimens likely improve consistency in …


Reducing Length Of Stay For Mental Health Patients, Faye Collins, Nancijean Goudey May 2019

Reducing Length Of Stay For Mental Health Patients, Faye Collins, Nancijean Goudey

MaineHealth Maine Medical Center

Background:

Our facility sees an average of over 200 mental health patients every month, with limited community resources. The length of stay (LOS) for these patients had slowly risen to unacceptable levels; the number of patients whose LOS was greater than 24 hours increased in fiscal year (FY) 2017, from 633 patients to 1145. Patients in crisis require expedited transfer to appropriate care locations. Our goal was to decrease the overall length of stay for mental health patients in the Emergency Department.


Post Lumbar-Puncture Headache Experience In A Community Hospital (Peach) Study, Melissa Kessel, Caroline Knight, Robert Stein May 2019

Post Lumbar-Puncture Headache Experience In A Community Hospital (Peach) Study, Melissa Kessel, Caroline Knight, Robert Stein

MaineHealth Maine Medical Center

Introduction:

Post lumbar puncture (LP) headaches have been reported to occur in 10 to 30% of patients . The incidence of post-LP headaches at Pen Bay Medical Center (PBMC) was unknown prior to this study. This study was undertaken to attempt to understand the local experience with this procedural complication.


Multimodality Somatostatin Analog For Fluorescence-Guided Surgery In Cancer, Servando Hernandez Vargas May 2019

Multimodality Somatostatin Analog For Fluorescence-Guided Surgery In Cancer, Servando Hernandez Vargas

Dissertations and Theses (Open Access)

Cancer surgery remains the primary curative treatment for most solid cancers and has major therapeutic implications for patients with neuroendocrine tumors (NETs). Anatomical and functional imaging technologies are widely used during the pre- and postoperative stages, but intraoperative disease recognition relies on direct visual inspection and the hands of surgeons. The limited number of clinical tools for real-time intraoperative visual feedback restricts the ability to remove the complete cancer source and is partially responsible for the high rate of disease recurrence in patients. Intraoperative imaging with fluorescent contrast agents has the potential to improve the ability of surgeons to detect …


Quantitative Imaging For Precision Medicine In Head And Neck Cancer Patients, Rachel Ger May 2019

Quantitative Imaging For Precision Medicine In Head And Neck Cancer Patients, Rachel Ger

Dissertations and Theses (Open Access)

The purpose of this work was to determine if prediction models using quantitative imaging measures in head and neck squamous cell carcinoma (HNSCC) patients could be improved when noise due to imaging was reduced. This was investigated separately for salivary gland function using dynamic contrast enhanced magnetic resonance imaging (DCE-MRI), overall survival using computed tomography (CT)-based radiomics, and overall survival using positron emission tomography (PET)-based radiomics. From DCE-MRI, where T1-weighted images are serially acquired after injection of contrast, quantitative measures of diffusion can be obtained from the series of images. Radiomics is the study of the relationship of voxels to …


Development Of Automated Radiotherapy Treatment Planning For Cervical And Breast Cancer For Resource-Constrained Clinics, Kelly Kisling May 2019

Development Of Automated Radiotherapy Treatment Planning For Cervical And Breast Cancer For Resource-Constrained Clinics, Kelly Kisling

Dissertations and Theses (Open Access)

Globally, cancer rates are on the rise, especially in low- and middle-income countries (LMICs). However, many of these countries lack access to radiotherapy, which is due in part to a substantial shortage of the staff necessary to deliver safe and effective radiotherapy. This staff shortage could be mitigated by the automation of the radiation treatment planning process. To this end, we developed automated planning for cervical and postmastectomy breast cancer radiotherapy, the two most common types of cancer in women in many LMICs.

For radiotherapy of cervical cancer in resource-constrained clinics, the recommended treatment technique is a four-field box. We …


The Impacts Of Insurance And Billing Considerations On The Practice And Attitudes Of Genetic Counselors, Emily Krosschell May 2019

The Impacts Of Insurance And Billing Considerations On The Practice And Attitudes Of Genetic Counselors, Emily Krosschell

Dissertations and Theses (Open Access)

Genesurance counseling has been identified as an integral part of many genetic counseling sessions, but little is known about the workflow impacts and genetic counselor perceptions of genesurance-related tasks. In this study, we aimed to characterize how insurance and billing considerations for genetic testing are being incorporated into genetic counselors’ practice; as well as describe current attitudes and challenges associated with their integration. An electronic survey was sent by email to members of the National Society of Genetic Counselors (NSGC). A total of 325 genetic counselors that provided direct patient care were included in data analysis. Results showed that the …


Metabolic Control, Quality Of Life, And Body Image In Patients With Glycogen Storage Disease Type Ia, Alexa Bream May 2019

Metabolic Control, Quality Of Life, And Body Image In Patients With Glycogen Storage Disease Type Ia, Alexa Bream

Dissertations and Theses (Open Access)

Glycogen storage disease is a group of inborn errors of metabolism, with type Ia being the most common form of the disorder. Glycogen storage disease type Ia (GSDIa) is a multisystemic condition in which individuals have various complications secondary to an inability to properly break down glycogen and to perform gluconeogenesis. Complex management is then necessary for patients and includes dietary modification, frequent cornstarch usage, and evaluation for additional complications such as hepatic adenomas, hypertriglyceridemia, and kidney disease. Previous studies have found lower scores in quality of life and body image in GSDIa patients; however, the specific factors influencing this …


Hypoglycemia In Mitochondrial Disorders, Allison Moats May 2019

Hypoglycemia In Mitochondrial Disorders, Allison Moats

Dissertations and Theses (Open Access)

INTRODUCTION: The electron transport chain (ETC) in mitochondria functions to produce energy in the form of adenosine triphosphate (ATP). Defects in the mitochondrial or nuclear DNA that codes for components of the ETC lead to mitochondrial disorders (MTDs). MTDs are multi-system conditions affecting the heart, muscles, and especially brain. The endocrine system is commonly affected in MTDs, and diabetes and hyperglycemia are established secondary diagnoses. Rates of non-iatrogenic hypoglycemia have not been studied in individuals with MTDs. This study aims to investigate the frequency of hypoglycemia in patients with MTDs.

METHODS: Individuals diagnosed with a ‘definite’ or ‘probable’ …


Il-6/Jak1 Drives Pd-L1 Phosphorylation And Glycosylation To Promote Cancer Immune Evasion, Li-Chuan Chan May 2019

Il-6/Jak1 Drives Pd-L1 Phosphorylation And Glycosylation To Promote Cancer Immune Evasion, Li-Chuan Chan

Dissertations and Theses (Open Access)

Glycosylation of immune receptors and ligands, such as T-cell receptor (TCR), major histocompatibility complex (MHC), and co-inhibitory molecules, regulates immune signaling activation, antigen presentation, and immune surveillance. Recent studies revealed that the glycan structures of co-inhibitory molecules are required for receptor-ligand interaction, a critical feature for activating cancer immune evasion. However, it is unclear how oncogenic signaling initiates glycosylation of co-inhibitory molecules to induce immunosuppression. Here we show interleukin (IL)-6-activated Janus kinase 1 (JAK1) phosphorylates programmed death-ligand 1 (PD-L1)-Tyr112, leading to the recruitment of endoplasmic reticulum (ER)-associated N-glycosyltransferase, STT3A, which catalyzes the glycosylation of PD-L1, contributing to its stability. A …


Termination For Fetal Anomaly: What Is The Impact Of Genetic Counseling On Coping?, Cayleen Smith May 2019

Termination For Fetal Anomaly: What Is The Impact Of Genetic Counseling On Coping?, Cayleen Smith

Dissertations and Theses (Open Access)

Pregnancy termination for fetal anomaly (TFA) is a unique experience that can cause women to develop long-term, complicated grief. Although a woman’s experience with her healthcare providers has been previously identified as an important factor in coping, studies have shown that many women report their healthcare as lacking to some extent. Given the overlap in patient needs and the practice scope of a genetic counselor (GC), this study aimed to examine how genetic counseling may impact coping as well as explore patient expectations of GCs pre- and post-TFA. An online survey, which included the Brief COPE and The Short Version …


Genetic Counselor Utilization And Interpretation Of Somatic Tumor Testing In Evaluation For Lynch Syndrome, Danielle Williams May 2019

Genetic Counselor Utilization And Interpretation Of Somatic Tumor Testing In Evaluation For Lynch Syndrome, Danielle Williams

Dissertations and Theses (Open Access)

Lynch syndrome (LS) is a hereditary cancer predisposition syndrome characterized by increased risk for colorectal and uterine cancers. Individuals with pathogenic variants in the mismatch repair (MMR) genes (MLH1, MSH2/EPCAM, MSH6, PMS2) are diagnosed with LS and subsequently recommended to proceed with high risk screening protocols to increase prevention and early detection of LS-related cancers. Various tumor studies can help identify those at high risk for LS, but sometimes create uncertainty with discordant screening and germline results, leading to unexplained mismatch repair deficiency (UMMRD). Somatic testing of the MMR genes has created opportunities for resolving …