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Articles 1621 - 1650 of 1694

Full-Text Articles in Diseases

Examining Cancer-Related Pain And Quality Of Life In Lehigh Valley Home Care Patients, Linda G. Alley Phd, Rn, Hannah D. Paxton Rn, Mph, Michelle D. Flores Bsn, Rn, Carol A. Foltz Phd, Jen Wike Mph, Mba, Vickie Cunningham Bsn, Rn, Jeffrey Etchason Md Jan 2012

Examining Cancer-Related Pain And Quality Of Life In Lehigh Valley Home Care Patients, Linda G. Alley Phd, Rn, Hannah D. Paxton Rn, Mph, Michelle D. Flores Bsn, Rn, Carol A. Foltz Phd, Jen Wike Mph, Mba, Vickie Cunningham Bsn, Rn, Jeffrey Etchason Md

Administration & Leadership

No abstract provided.


Early Cardiac Metastasis From Squamous Cell Carcinoma Of The Tongue In 2 Patients, Jean Onwuchekwa, Jose Banchs Jan 2012

Early Cardiac Metastasis From Squamous Cell Carcinoma Of The Tongue In 2 Patients, Jean Onwuchekwa, Jose Banchs

The Texas Heart Institute Journal

Cardiac metastasis from primary tumors is rare. Cardiac metastasis from squamous cell carcinoma of the tongue is rare; in the English-language medical literature, we read of only 4 patients with this condition. Here, we discuss the cases of 2 such patients who presented at our institution only a few months apart. In both, with the use of 2-dimensional echocardiography, we incidentally found cardiac metastasis from squamous cell carcinoma of the tongue. Resection of the cardiac masses was precluded. These cases illustrate the usefulness of early cardiac evaluation with 2-dimensional echocardiography in patients with head and neck cancer and known metastatic …


Interferon Alpha For Chronic Hepatitis D, Zaigham Abbas, Muhammad Arsalan Khan, Mohammad Salih, Wasim Jafri Dec 2011

Interferon Alpha For Chronic Hepatitis D, Zaigham Abbas, Muhammad Arsalan Khan, Mohammad Salih, Wasim Jafri

Department of Medicine

Background:

Hepatitis D virus is a small defective RNA virus that requires the presence of hepatitis B virus infection to infect a person. Hepatitis D is a difficult-to-treat infection. Several clinical trials have been published on the efficacy of interferon alpha for hepatitis D virus (HDV) infection. However, there are few randomised trials evaluating the effects of interferon alpha, and it is difficult to judge any benefit of this intervention from the individual trials.

Objectives:

To evaluate the beneficial and harmful effects of interferon alpha for Patients with chronic hepatitis D.

Search methods:

We identified relevant for the review randomised …


Renal Thrombotic Microangiopathy In Mice With Combined Deletion Of Endocytic Recycling Regulators Ehd3 And Ehd4., Manju George, Mark A. Rainey, Mayumi Naramura, Kirk W. Foster, Melissa S. Holzapfel, Laura L. Willoughby, Guoguang Ying, Rasna M. Goswami, Channabasavaiah B. Gurumurthy, Vimla Band, Simon C. Satchell, Hamid Band Mar 2011

Renal Thrombotic Microangiopathy In Mice With Combined Deletion Of Endocytic Recycling Regulators Ehd3 And Ehd4., Manju George, Mark A. Rainey, Mayumi Naramura, Kirk W. Foster, Melissa S. Holzapfel, Laura L. Willoughby, Guoguang Ying, Rasna M. Goswami, Channabasavaiah B. Gurumurthy, Vimla Band, Simon C. Satchell, Hamid Band

Journal Articles: Eppley Institute

Eps15 Homology Domain-containing 3 (EHD3), a member of the EHD protein family that regulates endocytic recycling, is the first protein reported to be specifically expressed in the glomerular endothelium in the kidney; therefore we generated Ehd3(-/-) mice and assessed renal development and pathology. Ehd3(-/-) animals showed no overt defects, and exhibited no proteinuria or glomerular pathology. However, as the expression of EHD4, a related family member, was elevated in the glomerular endothelium of Ehd3(-/-) mice and suggested functional compensation, we generated and analyzed Ehd3(-/-); Ehd4(-/-) mice. These mice were smaller, possessed smaller and paler kidneys, were proteinuric and died between …


The Roles Of Conserved And Nonconserved Cysteinyl Residues In The Oligomerization And Function Of Mammalian Prestin, Benjamin Currall, Danielle Rossino, Heather Jensen Smith, Richard Hallworth Jan 2011

The Roles Of Conserved And Nonconserved Cysteinyl Residues In The Oligomerization And Function Of Mammalian Prestin, Benjamin Currall, Danielle Rossino, Heather Jensen Smith, Richard Hallworth

Journal Articles: Eppley Institute

The creation of several prestin knockout and knockin mouse lines has demonstrated the importance of the intrinsic outer hair cell membrane protein prestin to mammalian hearing. However, the structure of prestin remains largely unknown, with even its major features in dispute. Several studies have suggested that prestin forms homo-oligomers that may be stabilized by disulfide bonds. Our phylogenetic analysis of prestin sequences across chordate classes suggested that the cysteinyl residues could be divided into three groups, depending on the extent of their conservation between prestin orthologs and paralogs or homologs. An alanine scan functional analysis was performed of all nine …


Microrna-183 Family Expression In Hair Cell Development And Requirement Of Micrornas For Hair Cell Maintenance And Survival, Michael D. Weston, Marsha L. Pierce, Heather Jensen Smith, Bernd Fritzsch, Sonia Rocha-Sanchez, Kirk W. Beisel, Garrett A. Soukup Jan 2011

Microrna-183 Family Expression In Hair Cell Development And Requirement Of Micrornas For Hair Cell Maintenance And Survival, Michael D. Weston, Marsha L. Pierce, Heather Jensen Smith, Bernd Fritzsch, Sonia Rocha-Sanchez, Kirk W. Beisel, Garrett A. Soukup

Journal Articles: Eppley Institute

MicroRNAs (miRNAs) post-transcriptionally repress complementary target gene expression and can contribute to cell differentiation. The coordinate expression of miRNA-183 family members (miR-183, miR-96, and miR-182) has been demonstrated in sensory cells of the mouse inner ear and other vertebrate sensory organs. To further examine hair cell miRNA expression in the mouse inner ear, we have analyzed miR-183 family expression in wild type animals and various mutants with defects in neurosensory development. miR-183 family member expression follows neurosensory cell specification, exhibits longitudinal (basal-apical) gradients in maturating cochlear hair cells, and is maintained in sensory neurons and most hair cells into adulthood. …


High-Risk Human Papillomavirus (Hpv) Screening And Detection In Normal, Healthy Patient Saliva Samples: A Pilot Cluster Randomized Study, Deirdre O. Turner, Shelley J. Williams-Cocks, Ryan Bullen, Jeremy Catmull, Jesse Falk, Daniel Martin, Jerom Mauer, Annabel E. Barber, Robert C. Wang, Shawn Gerstenberger, Karl Kingsley Jan 2011

High-Risk Human Papillomavirus (Hpv) Screening And Detection In Normal, Healthy Patient Saliva Samples: A Pilot Cluster Randomized Study, Deirdre O. Turner, Shelley J. Williams-Cocks, Ryan Bullen, Jeremy Catmull, Jesse Falk, Daniel Martin, Jerom Mauer, Annabel E. Barber, Robert C. Wang, Shawn Gerstenberger, Karl Kingsley

Environmental & Global Health Faculty Research

Background: The human papillomaviruses (HPV) are a large family of non-enveloped DNA viruses, mainly associated with cervical cancers. Recent epidemiologic evidence has suggested that HPV may be an independent risk factor for oropharyngeal cancers. Evidence now suggests HPV may modulate the malignancy process in some tobacco- and alcohol-induced oropharynx tumors, but might also be the primary oncogenic factor for inducing carcinogenesis among some non-smokers. More evidence, however, is needed regarding oral HPV prevalence among healthy adults to estimate risk. The goal of this study was to perform an HPV screening of normal healthy adults to assess oral HPV prevalence.

Methods: …


Synthesis Of 3-Phenylpyrazolopyrimidine-1,2,3-Triazole Conjugates And Evaluation Of Their Src Kinase Inhibitory And Anticancer Activities, Anil Kumar, Israr Ahmad, Bhupender S. Chhikara, Rakesh Tiwari, Deendayal Mandal, Keykavous Parang Jan 2011

Synthesis Of 3-Phenylpyrazolopyrimidine-1,2,3-Triazole Conjugates And Evaluation Of Their Src Kinase Inhibitory And Anticancer Activities, Anil Kumar, Israr Ahmad, Bhupender S. Chhikara, Rakesh Tiwari, Deendayal Mandal, Keykavous Parang

Pharmacy Faculty Articles and Research

A series of two classes of 3-phenylpyrazolopyrimidine-1,2,3-triazole conjugates were synthesized using click chemistry approach. All compounds were evaluated for inhibition of Src kinase and human ovarian adenocarcinoma (SK-Ov-3), breast carcinoma (MDA-MB-361), and colon adenocarcinoma (HT-29). Hexyl triazolyl-substituted 3-phenylpyrazolopyrimidine exhibited inhibition of Src kinase with an IC50 value of 5.6 µM. 4-Methoxyphenyl triazolyl-substituted 3-phenylpyrazolopyrimidine inhibited the cell proliferation of HT-29 and SK-Ov-3 by 73% and 58%, respectively, at a concentration of 50 µM.


Measuring The Symptom Burden Of Lung Cancer: The Validity And Utility Of The Lung Cancer Module Of The M D Anderson Symptom Inventory, Tito R Mendoza, Xin Shelley Wang, Charles Lu, Guadalupe R Palos, Zhongxing Liao, Gary M Mobley, Shitij Kapoor, Charles S Cleeland Jan 2011

Measuring The Symptom Burden Of Lung Cancer: The Validity And Utility Of The Lung Cancer Module Of The M D Anderson Symptom Inventory, Tito R Mendoza, Xin Shelley Wang, Charles Lu, Guadalupe R Palos, Zhongxing Liao, Gary M Mobley, Shitij Kapoor, Charles S Cleeland

Faculty, Staff and Student Publications

We conducted a study to establish the psychometric properties of a module of the M. D. Anderson Symptom Inventory (MDASI) developed specifically for patients with lung cancer (MDASI-LC). The MDASI measures 13 common "core" symptoms of cancer and its treatment. The MDASI-LC includes the 13 core MDASI symptom items and three lung cancer-specific items: coughing, constipation, and sore throat. MDASI-LC items were administered to three cohorts of patients with lung cancer undergoing either chemotherapy or chemoradiotherapy. Known-group validity and criterion (concurrent) validity of the MDASI-LC were evaluated using the Eastern Cooperative Oncology Group performance status and the 12-item Short-Form Health …


New Perspectives On Melanoma: The Role Of Pax3, Sandra Medic Jan 2011

New Perspectives On Melanoma: The Role Of Pax3, Sandra Medic

Theses: Doctorates and Masters

Background: Cutaneous melanoma is an aggressive form of skin cancer, arising in cutaneous melanocytes. The transcription factor PAX3 is critical for the proper development of neural crest lineages including melanocytes. Melanocytic cells show continued PAX3 expression from melanoblast formation in the neural crest to their differentiation into melanocytes. While many studies clarify the importance of PAX3 in embryonic development of melanocytes, less well understood, and more perplexing, is the continued PAX3 expression in adult skin melanocytes. By contrast PAX3 is frequently found in melanomas and naevi, and its expression correlates with melanoma staging. In this study we explore the multiple …


Development Of Novel Biomarkers In Cancer: Detection Of Circulating Mir-141 As A Potential Prognostic Marker For Prostate Cancer, Jason Cadaoas Gonzales Dec 2010

Development Of Novel Biomarkers In Cancer: Detection Of Circulating Mir-141 As A Potential Prognostic Marker For Prostate Cancer, Jason Cadaoas Gonzales

UNLV Theses, Dissertations, Professional Papers, and Capstones

Prostate cancer (CAP) is the most common epithelial malignancy and the second leading cause of cancer deaths in American men. The identification of predictive and prognostic biomarkers in CAP patients is critical for improving clinical outcomes. Although the measurement of prostate-specific antigen (PSA) and radiographic studies are clinically approved to predict response to therapy, these tests can oftentimes prove to be inadequate in certain patients. Thus, it is important to discover new biomarkers to improve chances of survivability. We and others have shown that longitudinal measurements of circulating tumor cells (CTC) and lactate dehydrogenase (LDH) may aid in predicting response …


Lung Carcinoma: Its Profile And Changing Trends, Saad Siddiqui, Mohammed Usman Ali, Mahrukh Ayesha Ali, Noreen Shah, Shagufta Nasreen Jul 2010

Lung Carcinoma: Its Profile And Changing Trends, Saad Siddiqui, Mohammed Usman Ali, Mahrukh Ayesha Ali, Noreen Shah, Shagufta Nasreen

Section of Pulmonary & Critical Care

BACKGROUND: Lung Carcinoma is the leading causes of morbidity and mortality worldwide with an incidence of 1.3 million cases per year. This study was undertaken to determine prevalence of various histological types of lung carcinoma and to analyse their changing trends with time.

METHODS: This is a retrospective analytical study. A total of 330 cases of lung carcinoma were analysed from 2003 to 2008. Cases from Khyber Pakhtunkhwa and Federally Administered Tribal Area (FATA) were included in this study. Furthermore, only cases of lung carcinoma were considered while other malignancies were excluded.

RESULTS: Squamous Cell carcinoma was found in 42.7% …


Notch1 Functions As A Tumor Suppressor In A Model Of K-Ras–Induced Pancreatic Ductal Adenocarcinoma, Linda Hanlon, Jacqueline L Avila, Renée M Demarest, Scott Troutman, Megan Allen, Francesca Ratti, Anil K Rustgi, Ben Z Stanger, Fred Radtke, Volkan Adsay, Fenella Long, Anthony J Capobianco, Joseph L Kissil Jun 2010

Notch1 Functions As A Tumor Suppressor In A Model Of K-Ras–Induced Pancreatic Ductal Adenocarcinoma, Linda Hanlon, Jacqueline L Avila, Renée M Demarest, Scott Troutman, Megan Allen, Francesca Ratti, Anil K Rustgi, Ben Z Stanger, Fred Radtke, Volkan Adsay, Fenella Long, Anthony J Capobianco, Joseph L Kissil

Rowan-Virtua School of Osteopathic Medicine Departmental Research

K-ras is the most commonly mutated oncogene in pancreatic cancer and its activation in murine models is sufficient to recapitulate the spectrum of lesions seen in human pancreatic ductal adenocarcinoma (PDAC). Recent studies suggest that Notch receptor signaling becomes reactivated in a subset of PDACs, leading to the hypothesis that Notch1 functions as an oncogene in this setting. To determine whether Notch1 is required for K-ras-induced tumorigenesis, we used a mouse model in which an oncogenic allele of K-ras is activated and Notch1 is deleted simultaneously in the pancreas. Unexpectedly, the loss of Notch1 in this model resulted in increased …


Evaluating The Impact Of The Guatemalan Nursing Program On Staff, Organizational, And Clinical Outcomes, Sara Williamson Day May 2010

Evaluating The Impact Of The Guatemalan Nursing Program On Staff, Organizational, And Clinical Outcomes, Sara Williamson Day

Theses and Dissertations (ETD)

There is great disparity between the outcome of childhood cancer in developed and developing countries. Nurses, who comprise the largest group of health care professionals globally, are essential to successful treatment. Pediatric oncology education is generally unavailable for nurses in developing countries. This lack of education is likely to contribute to the disparity in survival rates, as undereducated nurses are unable to meet the demands of pediatric cancer care. A second critical problem in developing countries is the workload of the nurse, with a patient nurse ratio reported as high as 30 patients per one nurse.

In 2006, the quality …


A New Tumor Suppressor Gene Candidate Regulated By The Non-Coding Rna Pca3 In Human Prostate Cancer, Alessandro K. Lee May 2010

A New Tumor Suppressor Gene Candidate Regulated By The Non-Coding Rna Pca3 In Human Prostate Cancer, Alessandro K. Lee

Dissertations and Theses (Open Access)

Prostate cancer is the second leading cause of cancer-related death and the most common non-skin cancer in men in the USA. Considerable advancements in the practice of medicine have allowed a significant improvement in the diagnosis and treatment of this disease and, in recent years, both incidence and mortality rates have been slightly declining. However, it is still estimated that 1 man in 6 will be diagnosed with prostate cancer during his lifetime, and 1 man in 35 will die of the disease.

In order to identify novel strategies and effective therapeutic approaches in the fight against prostate cancer, it …


Cyclin D1 Amplification In Tongue And Buccal Mucosa Squamous Cell Carcinoma., Haydar M. Mahdey Jan 2010

Cyclin D1 Amplification In Tongue And Buccal Mucosa Squamous Cell Carcinoma., Haydar M. Mahdey

Student Works (2010-2019)

Introduction Oral cancer is a significant health problem worldwide with almost 300,000 new cases are diagnosed each year. Despite the numerous studies done, and even with the best treatment option utilized, more than 50% of patients with oral cancer will experience relapse. In search for better options for prognostication, researches are now focusing on the molecular biology of cancer, for instance in search of reliable tumor markers. Among the markers reported in the literatures, Cyclin D1 is actively studied protein. Cyclin D1 regulates the cell cycle progression by forming a complex with different cyclin dependant kinase. Dysregulation of cyclin D1 …


The Neighborhood Cancer Center, Gregory R. Harper Md, Phd, Debbie Salas-Lopez Md, Mph, Keith J. Weinhold Mha, Elliot J. Sussman Md, Mba Jan 2010

The Neighborhood Cancer Center, Gregory R. Harper Md, Phd, Debbie Salas-Lopez Md, Mph, Keith J. Weinhold Mha, Elliot J. Sussman Md, Mba

Administration & Leadership

No abstract provided.


Inadequate Health Numeracy Affects Cancer Screening Practices In Vulnerable Populations, Sherrine Eid Mph, Dorothy Faulkner Phd Jan 2010

Inadequate Health Numeracy Affects Cancer Screening Practices In Vulnerable Populations, Sherrine Eid Mph, Dorothy Faulkner Phd

Administration & Leadership

No abstract provided.


Expression And Function Of Hypoxia Inducible Factor-1 Alpha In Human Melanoma Under Non-Hypoxic Conditions, Caroline N. Mills, Sandeep S. Joshi, Richard M. Niles Nov 2009

Expression And Function Of Hypoxia Inducible Factor-1 Alpha In Human Melanoma Under Non-Hypoxic Conditions, Caroline N. Mills, Sandeep S. Joshi, Richard M. Niles

Biochemistry and Microbiology

Background

Hypoxia inducible factor-1 alpha (HIF-1α) protein is rapidly degraded under normoxic conditions. When oxygen tensions fall HIF-1α protein stabilizes and transactivates genes involved in adaptation to hypoxic conditions. We have examined the normoxic expression of HIF-1α RNA and protein in normal human melanocytes and a series of human melanoma cell lines isolated from radial growth phase (RGP), vertical growth phase (VGP) and metastatic (MET) melanomas.

Results

HIF-1α mRNA and protein was increased in RGP vs melanocytes, VGP vs RGP and MET vs VGP melanoma cell lines. We also detected expression of a HIF-1α mRNA splice variant that lacks part …


Ethnic Disparities In Cervical Cancer Survival Among Texas Women, Ann L. Coker, Christopher P. Desimone, Katherine S. Eggleston, Arica L. White, Melanie Williams Oct 2009

Ethnic Disparities In Cervical Cancer Survival Among Texas Women, Ann L. Coker, Christopher P. Desimone, Katherine S. Eggleston, Arica L. White, Melanie Williams

CRVAW Faculty Journal Articles

Objective: The aim of this work was to determine whether minority women are more likely to die of cervical cancer. A population-based cohort study was performed using Texas Cancer Registry (TCR) data from 1998 to 2002.

Methods: A total of 5,166 women with cervical cancer were identified during 1998–2002 through the TCR. Measures of socioeconomic status (SES) and urbanization were created using census block group-level data. Multilevel logistic regression was used to calculate the odds of dying from cervical cancer by race, and Cox proportional hazards modeling was used for cervical cancer-specific survival analysis.

Results: After adjusting for age, SES, …


A Generalized Beta Model For The Age Distribution Of Cancers: Application To Pancreatic And Kidney Cancer., Tengiz Mdzinarishvili, Michael X. Gleason, Leo Kinarsky, Simon Sherman Aug 2009

A Generalized Beta Model For The Age Distribution Of Cancers: Application To Pancreatic And Kidney Cancer., Tengiz Mdzinarishvili, Michael X. Gleason, Leo Kinarsky, Simon Sherman

Journal Articles: Eppley Institute

The relationships between cancer incidence rates and the age of patients at cancer diagnosis are a quantitative basis for modeling age distributions of cancer. The obtained model parameters are needed to build rigorous statistical and biological models of cancer development. In this work, a new mathematical model, called the Generalized Beta (GB) model is proposed. Confidence intervals for parameters of this model are derived from a regression analysis. The GB model was used to approximate the incidence rates of the first primary, microscopically confirmed cases of pancreatic cancer (PC) and kidney cancer (KC) that served as a test bed for …


Loss Of Ski Expression In Testicular Cancer Leads To An Enhanced Invasive Phenotype Through Both Bmp-Dependent And Bmp-Independent Pathways, Amy N. Nash Jan 2009

Loss Of Ski Expression In Testicular Cancer Leads To An Enhanced Invasive Phenotype Through Both Bmp-Dependent And Bmp-Independent Pathways, Amy N. Nash

Theses, Dissertations and Capstones

The proto-oncogene SKI is a transcription factor and a co-repressor of the TGFβ superfamily, including TGF

β and BMP. However, additional data suggests that SKI may function as a tumor suppressor in some cell types. The TGFβ superfamily has been implicated in cancer progression and germ cell migration. Testicular cancer afflicts men during their peak reproductive years and is the most common cancer among men of this age group. Cisplatin-based chemotherapy is the standard treatment for testicular cancer. This treatment can lead to undesirable side effects, including infertility. We have shown that SKI expression is decreased in testicular germ cell …


Characterization Of Kaposi's Sarcoma-Associated Herpesvirus Orf11 As A Possible Dutpase, Christina N. Ramirez Aug 2008

Characterization Of Kaposi's Sarcoma-Associated Herpesvirus Orf11 As A Possible Dutpase, Christina N. Ramirez

Seton Hall University Dissertations and Theses (ETDs)

A dUTPase is a crucial enzyme that hydrolyzes dUTP to dUMP. This reaction prevents the mutagenic or lethal misincorporation of uracil into DNA. For that reason, the enzyme is required for efficient DNA replication. Previous studies have shown that has ORFl l dUTPase-like motifs and thus may be a dUTPase. Generally, gammaherpesviruses contain six characteristic dUTPase motifs. In particular ORFl 1 and contains motifs 1, 2, 4, 6. While the characteristic motifs of gamroaberpesviruses include motifs 1, 2, 3, 4, 5, and 6, the number of dUTPase-like motifs in ORFl 1 's protein sequence is substantial. Thus, ORFl 1 may …


Nitrated Alpha-Synuclein Immunity Accelerates Degeneration Of Nigral Dopaminergic Neurons., Eric J. Benner, Rebecca Banerjee, Ashley D. Reynolds, Simon Sherman, Vladimir M. Pisarev, Vladislav Tsiperson, Craig Nemachek, Pawel Ciborowski, Serge Przedborski, R. Lee Mosley, Howard Gendelman Jan 2008

Nitrated Alpha-Synuclein Immunity Accelerates Degeneration Of Nigral Dopaminergic Neurons., Eric J. Benner, Rebecca Banerjee, Ashley D. Reynolds, Simon Sherman, Vladimir M. Pisarev, Vladislav Tsiperson, Craig Nemachek, Pawel Ciborowski, Serge Przedborski, R. Lee Mosley, Howard Gendelman

Journal Articles: Eppley Institute

BACKGROUND: The neuropathology of Parkinson's disease (PD) includes loss of dopaminergic neurons in the substantia nigra, nitrated alpha-synuclein (N-alpha-Syn) enriched intraneuronal inclusions or Lewy bodies and neuroinflammation. While the contribution of innate microglial inflammatory activities to disease are known, evidence for how adaptive immune mechanisms may affect the course of PD remains obscure. We reasoned that PD-associated oxidative protein modifications create novel antigenic epitopes capable of peripheral adaptive T cell responses that could affect nigrostriatal degeneration.

METHODS AND FINDINGS: Nitrotyrosine (NT)-modified alpha-Syn was detected readily in cervical lymph nodes (CLN) from 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) intoxicated mice. Antigen-presenting cells within the CLN …


Selective Repression Of Retinoic Acid Target Genes By Rip140 During Induced Tumor Cell Differentiation Of Pluripotent Human Embryonal Carcinoma Cells, Kelly C. Heim, Kristina A. White, Dexin Deng, Craig R. Tomlinson, Jason Moore, Sarah Freemantle, Michael Spinella Sep 2007

Selective Repression Of Retinoic Acid Target Genes By Rip140 During Induced Tumor Cell Differentiation Of Pluripotent Human Embryonal Carcinoma Cells, Kelly C. Heim, Kristina A. White, Dexin Deng, Craig R. Tomlinson, Jason Moore, Sarah Freemantle, Michael Spinella

Dartmouth Scholarship

The use of retinoids as anti-cancer agents has been limited due to resistance and low efficacy. The dynamics of nuclear receptor coregulation are incompletely understood. Cell-and context-specific activities of nuclear receptors may be in part due to distinct coregulator complexes recruited to distinct subsets of target genes. RIP140 (also called NRIP1) is a ligand-dependent corepressor that is inducible with retinoic acid (RA). We had previously shown that RIP140 limits RA induced tumor cell differentiation of embryonal carcinoma; the pluriopotent stem cells of testicular germ cell tumors. This implies that RIP140 represses key genes required for RA-mediated tumor cell differentiation. Identification …


Let-7 Expression Defines Two Differentiation Stages Of Cancer, Scott Shell, Sun-Mi Park, Amir Reza Radjabi, Robert Schickel, Emily Kistner, David Jewell Jul 2007

Let-7 Expression Defines Two Differentiation Stages Of Cancer, Scott Shell, Sun-Mi Park, Amir Reza Radjabi, Robert Schickel, Emily Kistner, David Jewell

Dartmouth Scholarship

The early phases of carcinogenesis resemble embryonic development, often involving the reexpression of embryonic mesenchymal genes. The NCI60 panel of human tumor cell lines can genetically be subdivided into two superclusters (SCs) that correspond to CD95 Type I and II cells. SC1 cells are characterized by a mesenchymal and SC2 cells by an epithelial gene signature, suggesting that SC1 cells represent less differentiated, advanced stages of cancer. miRNAs are small 20- to 22-nucleotide-long noncoding RNAs that inhibit gene expression at the posttranscriptional level. By performing miRNA expression analysis on 10 Type I and 10 Type II cells, we have determined …


Colon Carcinoma Cells Harboring Pik3ca Mutations Display Resistance To Growth Factor Deprivation Induced Apoptosis., J. Wang, Karen Kuropatwinski, Jennie Hauser, Michael R. Rossi, Yunfei Zhou, Alexis Conway, Julie L.C. Kan, Neil W. Gibson, James K.V. Willson, John K. Cowell, Michael G. Brattain Mar 2007

Colon Carcinoma Cells Harboring Pik3ca Mutations Display Resistance To Growth Factor Deprivation Induced Apoptosis., J. Wang, Karen Kuropatwinski, Jennie Hauser, Michael R. Rossi, Yunfei Zhou, Alexis Conway, Julie L.C. Kan, Neil W. Gibson, James K.V. Willson, John K. Cowell, Michael G. Brattain

Journal Articles: Eppley Institute

PIK3CA, encoding the p110alpha catalytic subunit of phosphatidylinositol 3-kinase (PI3K), is mutated in a variety of human cancers. We screened the colon cancer cell lines previously established in our laboratory for PIK3CA mutations and found that four of them harbored gain of function mutations. We have now compared a panel of mutant and wild-type cell lines for cell proliferation and survival in response to stress. There was little difference in PI3K activity between mutant PIK3CA-bearing cells (mutant cells) and wild-type PIK3CA-bearing cells (wild-type cells) under optimal growth conditions. However, the mutant cells showed constitutive PI3K activity during growth factor deprivation …


Effects Of Retinoic Acid On Beta-Catenin Transcriptional Activity In Melanoma Cells, Fung Chan Jan 2007

Effects Of Retinoic Acid On Beta-Catenin Transcriptional Activity In Melanoma Cells, Fung Chan

Theses, Dissertations and Capstones

Melanoma is the most dangerous form of skin cancer and its incidence has been increasing in the United States. Most melanomas are resistant to current chemotherapies; therefore, understanding the mechanism of melanomagenesis is beneficial to treatment of the diseases. Accumulation of β-catenin has been shown in colon and other cancers, including melanomas, but the transcriptional role of β-catenin in melanomas is still unclear. All-trans retinoic acid (ATRA) is an anti-tumor agent that has an inhibitory effect on β-catenin, but this effect has not been studied in melanomas. It has been shown that Microphthalmia-associated transcription factor (MITF), a melanocyte specific protein, …


Long-Distance Three-Color Neuronal Tracing In Fixed Tissue Using Neurovue Dyes, Heather Jensen Smith, Brian Gray, Katharine Muirhead, Betsy Ohlsson-Wilhelm, Bernd Fritzsch Jan 2007

Long-Distance Three-Color Neuronal Tracing In Fixed Tissue Using Neurovue Dyes, Heather Jensen Smith, Brian Gray, Katharine Muirhead, Betsy Ohlsson-Wilhelm, Bernd Fritzsch

Journal Articles: Eppley Institute

Dissecting development of neuronal connections is critical for understanding neuronal function in both normal and diseased states. Charting the development of the multitude of connections is a monumental task, since a given neuron typically receives hundreds of convergent inputs from other neurons and provides divergent outputs for hundreds of other neurons. Although progress is being made utilizing various mutants and/or genetic constructs expressing fluorescent proteins like GFP, substantial work remains before a database documenting the development and final location of the neuronal pathways in an adult animal is completed. The vast majority of developing neurons cannot be specifically labeled with …


Lateral Wall Protein Content Mediates Alterations In Cochlear Outer Hair Cell Mechanics Before And After Hearing Onset, Heather Jensen Smith, Richard Hallworth Jan 2007

Lateral Wall Protein Content Mediates Alterations In Cochlear Outer Hair Cell Mechanics Before And After Hearing Onset, Heather Jensen Smith, Richard Hallworth

Journal Articles: Eppley Institute

Specialized outer hair cells (OHCs) housed within the mammalian cochlea exhibit active, nonlinear, mechanical responses to auditory stimulation termed electromotility. The extraordinary frequency resolution capacity of the cochlea requires an exquisitely equilibrated mechanical system of sensory and supporting cells. OHC electromotile length change, stiffness, and force generation are responsible for a 100-fold increase in hearing sensitivity by augmenting vibrational input to non-motile sensory inner hair cells. Characterization of OHC mechanics is crucial for understanding and ultimately preventing permanent functional deficits due to overstimulation or as a consequence of various cochlear pathologies. The OHCs' major structural assembly is a highly-specialized lateral …