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Articles 1 - 30 of 52
Full-Text Articles in Medicine and Health Sciences
Oocyte Peptides As Paracrine Tools For Ovarian Stimulation And Oocyte Maturation., David G Mottershead, Andrew J Watson
Oocyte Peptides As Paracrine Tools For Ovarian Stimulation And Oocyte Maturation., David G Mottershead, Andrew J Watson
Obstetrics & Gynaecology Publications
Recent studies report the production and isolation of a stable bioactive recombinant human bone morphogenetic protein 15 (rhBMP15) that is appropriately processed in HEK-293 cells and activates the SMAD 1/5/8 pathway in mouse granulosa cell cultures. Further, the purified rhBMP15 induces the expression of genes associated with cumulus expansion. Thanks to recent research, we have a greater understanding of the importance of the dialogue that occurs between the oocyte and the granulosa cell layer with regard to regulating folliculogenesis and the acquisition of oocyte developmental competence and maturation. BMP15 is one of the critical components of these intra-follicular communication pathways. …
Resting State Default-Mode Network Connectivity In Early Depression Using A Seed Region-Of-Interest Analysis: Decreased Connectivity With Caudate Nucleus., Robyn Bluhm, Peter Williamson, Ruth Lanius, Jean Theberge, Maria Densmore, Robert Bartha, Richard Neufeld, Elizabeth Osuch
Resting State Default-Mode Network Connectivity In Early Depression Using A Seed Region-Of-Interest Analysis: Decreased Connectivity With Caudate Nucleus., Robyn Bluhm, Peter Williamson, Ruth Lanius, Jean Theberge, Maria Densmore, Robert Bartha, Richard Neufeld, Elizabeth Osuch
Department of Medicine Publications
AIM: Reports on resting brain activity in healthy controls have described a default-mode network (DMN) and important differences in DMN connectivity have emerged for several psychiatric conditions. No study to date, however, has investigated resting-state DMN in relatively early depression before years of medication treatment. The objective of the present study was, therefore, to investigate the DMN in patients seeking help from specialized mental health services for the first time for symptoms of depression.
METHODS: Fourteen depressed subjects and 15 matched controls were scanned using 4-T functional magnetic resonance imaging while resting with eyes closed. All but one subject was …
Victims Of Violence Among Indigenous Mothers Living With Dependent Children, Kyllie Cripps, Catherine M. Bennett, Lyle C. Gurrin, David M. Studdert
Victims Of Violence Among Indigenous Mothers Living With Dependent Children, Kyllie Cripps, Catherine M. Bennett, Lyle C. Gurrin, David M. Studdert
Aboriginal Policy Research Consortium International (APRCi)
Objective: Toidentifyindividualandhouseholdfactorsassociatedwithviolenceamong Australian Indigenous women with dependent children. Design and participants: Univariate and multivariable analysis of data from the 2002 National Aboriginal and Torres Strait Islander Social Survey, stratified by area.
Main outcome measure: Self-reported experience of being a victim of violence in the previous year. Results: OneinfourIndigenouswomenlivingwithdependentchildrenyoungerthan 15 years reported being victims of violence in the previous year; this corresponds to an estimated 24 221 Indigenous mothers (95% CI, 21 507–26 935) nationwide. Violence was more prevalent in regional areas and cities than remote areas. In remote areas, mothers who had been removed from their natural families during childhood …
Early Psychosis: A Novel Gateway For Suicide Prevention, Amresh Srivastava
Early Psychosis: A Novel Gateway For Suicide Prevention, Amresh Srivastava
Psychiatry Presentations
No abstract provided.
The Effects Of Field-Of-View And Patient Size On Ct Numbers From Cone-Beam Computed Tomography., Katrina Y T Seet, Arvand Barghi, Slav Yartsev, Jacob Van Dyk
The Effects Of Field-Of-View And Patient Size On Ct Numbers From Cone-Beam Computed Tomography., Katrina Y T Seet, Arvand Barghi, Slav Yartsev, Jacob Van Dyk
Oncology Publications
Cone-beam computed tomography (CBCT) is used for patient alignment before treatment and is ideal for use in adaptive radiotherapy to account for tumor shrinkage, organ deformation and weight loss. However, CBCT images are prone to artifacts such as streaking and cupping effects, reducing image quality and CT number accuracy. Our goal was to determine the optimum combination of cone-beam imaging options to increase the accuracy of image CT numbers. Several phantoms with and without inserts of known relative electron densities were imaged using the Varian on-board imaging system. It was found that CT numbers are most influenced by the selection …
Open Access Publishing In The Biological/Medical Sciences, J. Madrenas
Open Access Publishing In The Biological/Medical Sciences, J. Madrenas
Robarts Immunology and Transplantation Presentations
No abstract provided.
Community-Based Suicide Prevention Research In Remote On-Reserve First Nations Communities, Corinne A. Isaak, Mike Campeau, Laurence Y. Katz, Murray W. Enns, Brenda Elias, Jitender Sareen
Community-Based Suicide Prevention Research In Remote On-Reserve First Nations Communities, Corinne A. Isaak, Mike Campeau, Laurence Y. Katz, Murray W. Enns, Brenda Elias, Jitender Sareen
Aboriginal Policy Research Consortium International (APRCi)
Suicide is a complex problem linked to genetic, environmental, psychological and community factors. For the Aboriginal population more specifically, loss of culture, history of traumatic events, individual, family and community factors may also play a role in suicidal behaviour. Of particular concern is the high rate of suicide among Canadian Aboriginal youth. While the need to develop interventions to reduce suicidal behaviour for First Nations on-reserve populations is evident, there may be an element of distrust of researchers by Aboriginal communities. Furthermore, research in mental health and specifically suicide is much more sensitive than studying medical illnesses like diabetes. Clearly, …
What Factors Predict Outcome At Relapse After Previous Esophagectomy And Adjuvant Therapy In High-Risk Esophageal Cancer?, Edward Yu, Patricia Tai, Richard Malthaner, Larry Stitt, George Rodrigues, Rashid Dar, Brian Yaremko, Jawaid Younus, Michael Sanatani, Mark Vincent, Brian Dingle, Dalilah Fortin, Richard Inculet
What Factors Predict Outcome At Relapse After Previous Esophagectomy And Adjuvant Therapy In High-Risk Esophageal Cancer?, Edward Yu, Patricia Tai, Richard Malthaner, Larry Stitt, George Rodrigues, Rashid Dar, Brian Yaremko, Jawaid Younus, Michael Sanatani, Mark Vincent, Brian Dingle, Dalilah Fortin, Richard Inculet
Oncology Presentations
Management of patients who have disease relapse after completion of surgery and adjuvant chemo-radiation (CRT) is controversial.
Some oncologists would advocate intensive therapeutic intervention due to promising experience on treatment for recurrence disease while others would recommend palliative support due to the concerns for poor patient outcome post disease recurrence.
In Addition, it is not clear if patient outcome is improved post adjuvant CRT when patients at risk have resection margin involvement and if time interval to recurrence can affect patient survival post relapse.
The present study was conducted to determine what factors will affect patient outcome at relapse after …
Ethical Challenges In Icu Research, Charles Weijer
Ethical Challenges In Icu Research, Charles Weijer
Philosophy Presentations
No abstract provided.
When Can Physicians Say “No” To Families And Patients?, Charles Weijer
When Can Physicians Say “No” To Families And Patients?, Charles Weijer
Philosophy Presentations
No abstract provided.
The Vesicular Acetylcholine Transporter Is Required For Neuromuscular Development And Function, Braulio M. De Castro, Xavier De Jaeger, Cristina Martins-Silva, Ricardo D. F. Lima, Ernani Amaral, Cristiane Menezes, Patricia Lima, Cintia M. L. Neves, Rita G. Pires, Thomas W. Gould, Ian Welch, Christopher Kushmerick, Cristina Guatimosim, Ivan Izquierdo, Martin Cammarota, Jane R. Rylett, Marcus V. Gomez, Marc G. Caron, Ronald W. Oppenheim, Marco A. M. Prado, Vania F. Prado
The Vesicular Acetylcholine Transporter Is Required For Neuromuscular Development And Function, Braulio M. De Castro, Xavier De Jaeger, Cristina Martins-Silva, Ricardo D. F. Lima, Ernani Amaral, Cristiane Menezes, Patricia Lima, Cintia M. L. Neves, Rita G. Pires, Thomas W. Gould, Ian Welch, Christopher Kushmerick, Cristina Guatimosim, Ivan Izquierdo, Martin Cammarota, Jane R. Rylett, Marcus V. Gomez, Marc G. Caron, Ronald W. Oppenheim, Marco A. M. Prado, Vania F. Prado
Anatomy and Cell Biology Publications
The vesicular acetylcholine (ACh) transporter (VAChT) mediates ACh storage by synaptic vesicles. However, the VAChT-independent release of ACh is believed to be important during development. Here we generated VAChT knockout mice and tested the physiological relevance of the VAChT-independent release of ACh. Homozygous VAChT knockout mice died shortly after birth, indicating that VAChT-mediated storage of ACh is essential for life. Indeed, synaptosomes obtained from brains of homozygous knockouts were incapable of releasing ACh in response to depolarization. Surprisingly, electrophysiological recordings at the skeletal-neuromuscular junction show that VAChT knockout mice present spontaneous miniature end-plate potentials with reduced amplitude and frequency, which …
Adapting To Dynamic Stimulus-Response Values: Differential Contributions Of Inferior Frontal, Dorsomedial, And Dorsolateral Regions Of Prefrontal Cortex To Decision Making., Derek G V Mitchell, Qian Luo, Shelley B Avny, Tomasz Kasprzycki, Karanvir Gupta, Gang Chen, Elizabeth C Finger, R James R Blair
Adapting To Dynamic Stimulus-Response Values: Differential Contributions Of Inferior Frontal, Dorsomedial, And Dorsolateral Regions Of Prefrontal Cortex To Decision Making., Derek G V Mitchell, Qian Luo, Shelley B Avny, Tomasz Kasprzycki, Karanvir Gupta, Gang Chen, Elizabeth C Finger, R James R Blair
Brain and Mind Institute Researchers' Publications
Dorsomedial prefrontal cortex (dmPFC), dorsolateral prefrontal cortex (dlPFC), and inferior frontal gyrus (IFG) have all been implicated in resolving decision conflict whether this conflict is generated by having to select between responses of similar value or by making selections following a reversal in reinforcement contingencies. However, work distinguishing their individual functional contributions remains preliminary. We used functional magnetic resonance imaging to delineate the functional role of these systems with regard to both forms of decision conflict. Within dmPFC and dlPFC, blood oxygen level-dependent responses increased in response to decision conflict regardless of whether the conflict occurred in the context of …
Tobacco Control Interest Groups And Their Influence On Parliamentary Committees In Canada, Robyn E. Hastie, Anita Kothari
Tobacco Control Interest Groups And Their Influence On Parliamentary Committees In Canada, Robyn E. Hastie, Anita Kothari
Health Studies Publications
Objectives: The aim of this study was to determine how tobacco control interest groups influence tobacco policy decision-making through submissions and presentations to parliamentary committees.
Methods: A qualitative content analysis was used to examine the presentations and submissions on tobacco-related legislation made to parliamentary committees between 1996 and 2004. The sample was identified from the public list of tobacco-related bills tabled in both the House of Commons and the Senate; the Government of Canada website and LEGISinfo were used to determine which committee reviewed the relevant bill. Committee clerks were asked to send submissions and presentations related to specific bills …
Effects Of Genistein Following Fractionated Lung Irradiation In Mice., Andrea E Para, Andrea Bezjak, Ivan W T Yeung, Jacob Van Dyk, Richard P Hill
Effects Of Genistein Following Fractionated Lung Irradiation In Mice., Andrea E Para, Andrea Bezjak, Ivan W T Yeung, Jacob Van Dyk, Richard P Hill
Oncology Publications
BACKGROUND AND PURPOSE: This study investigated protection of lung injury by genistein following fractionated doses of radiation and its effect on tumor response.
MATERIAL AND METHODS: C3H/HeJ mice were irradiated (100 kVp X-rays) with 9 fractions of 3.1 Gy over 30 days (approximately equivalent to 10 Gy single dose) and were maintained on a genistein diet ( approximately 10mg/kg). Damage was assessed over 28 weeks in lung cells by a cytokinesis block micronucleus (MN) assay and by changes in breathing rate and histology. Tumor protection was assessed using a colony assay to determine cell survival following in situ irradiation of …
Should Schizoaffective Disorder Be Dropped From Dsm V, Amresh Srivastava
Should Schizoaffective Disorder Be Dropped From Dsm V, Amresh Srivastava
Psychiatry Presentations
No abstract provided.
Beyond Recovery: Colonization, Health And Healing For Indigenous People In Canada, Lynn F. Lavallee, Jennifer M. Poole
Beyond Recovery: Colonization, Health And Healing For Indigenous People In Canada, Lynn F. Lavallee, Jennifer M. Poole
Aboriginal Policy Research Consortium International (APRCi)
How do we limit our focus to mental health when Indigenous teaching demands a much wider lens? How do we respond to mental health recovery when Indigenous experience speaks to a very different approach to healing, and how can we take up the health of Indigenous people in Canada without a discussion of identity and colonization? We cannot, for the mental health and recovery of Indigenous people in Canada have always been tied to history, identity, politics, language and dislocation. Thus, in this paper, our aim is to make clear that history, highlight the impacts of colonization and expound on …
High Aldehyde Dehydrogenase And Expression Of Cancer Stem Cell Markers Selects For Breast Cancer Cells With Enhanced Malignant And Metastatic Ability, Alysha K. Croker, David Goodale, Jenny Chu, Carl Postenka, Benjamin D. Hedley, David A. Hess, Alison L. Allan
High Aldehyde Dehydrogenase And Expression Of Cancer Stem Cell Markers Selects For Breast Cancer Cells With Enhanced Malignant And Metastatic Ability, Alysha K. Croker, David Goodale, Jenny Chu, Carl Postenka, Benjamin D. Hedley, David A. Hess, Alison L. Allan
Anatomy and Cell Biology Publications
Cancer stem cells (CSCs) have recently been identified in leukaemia and solid tumours; however, the role of CSCs in metastasis remains poorly understood. This dearth of knowledge about CSCs and metastasis is due largely to technical challenges associated with the use of primary human cancer cells in pre-clinical models of metastasis. Therefore, the objective of this study was to develop suitable pre-clinical model systems for studying stem-like cells in breast cancer metastasis, and to test the hypothesis that stem-like cells play a key role in metastatic behaviour. We assessed four different human breast cancer cell lines (MDA-MB-435, MDA-MB-231, MDA-MB-468, MCF-7) …
Perirhinal Cortex Contributes To Accuracy In Recognition Memory And Perceptual Discriminations., Edward B O'Neil, Anthony D Cate, Stefan Köhler
Perirhinal Cortex Contributes To Accuracy In Recognition Memory And Perceptual Discriminations., Edward B O'Neil, Anthony D Cate, Stefan Köhler
Brain and Mind Institute Researchers' Publications
The prevailing view of the medial temporal lobe (MTL) holds that its structures are dedicated to long-term declarative memory. Recent evidence challenges this position, suggesting that perirhinal cortex (PRc) in the MTL may also play a role in perceptual discriminations of stimuli with substantial visual feature overlap. Relevant neuropsychological findings in humans have been inconclusive, likely because studies have relied on patients with large and variable MTL lesions. Here, we conducted a functional magnetic resonance imaging study in healthy individuals to determine whether PRc shows a performance-related involvement in perceptual oddball judgments that is comparable to its established role in …
Intrauterine Growth Restriction Increases Fetal Hepatic Gluconeogenic Capacity And Reduces Messenger Ribonucleic Acid Translation Initiation And Nutrient Sensing In Fetal Liver And Skeletal Muscle., Stephanie R Thorn, Timothy Regnault, Laura D Brown, Paul J Rozance, Jane Keng, Michael Roper, Randall B Wilkening, William W Hay, Jacob E Friedman
Intrauterine Growth Restriction Increases Fetal Hepatic Gluconeogenic Capacity And Reduces Messenger Ribonucleic Acid Translation Initiation And Nutrient Sensing In Fetal Liver And Skeletal Muscle., Stephanie R Thorn, Timothy Regnault, Laura D Brown, Paul J Rozance, Jane Keng, Michael Roper, Randall B Wilkening, William W Hay, Jacob E Friedman
Paediatrics Publications
Expression of key metabolic genes and proteins involved in mRNA translation, energy sensing, and glucose metabolism in liver and skeletal muscle were investigated in a late-gestation fetal sheep model of placental insufficiency intrauterine growth restriction (PI-IUGR). PI-IUGR fetuses weighed 55% less; had reduced oxygen, glucose, isoleucine, insulin, and IGF-I levels; and had 40% reduction in net branched chain amino acid uptake. In PI-IUGR skeletal muscle, levels of insulin receptor were increased 80%, whereas phosphoinositide-3 kinase (p85) and protein kinase B (AKT2) were reduced by 40%. Expression of eukaryotic initiation factor-4e was reduced 45% in liver, suggesting a unique mechanism limiting …
Post-Traumatic Stress Disorder And Health Problems Among Medically Ill Canadian Peacekeeping Veterans, Don Richardson, Jordan Pekevski, Jon D Elhai
Post-Traumatic Stress Disorder And Health Problems Among Medically Ill Canadian Peacekeeping Veterans, Don Richardson, Jordan Pekevski, Jon D Elhai
MacDonald Franklin OSI Research Centre
OBJECTIVE:
The aim of the present study was to examine the relationship between post-traumatic stress disorder (PTSD) symptom severity and four significant health conditions (gastrointestinal disorders, musculoskeletal problems, headaches, and cardiovascular problems).
METHOD:
Participants included 707 Canadian peacekeeping veterans with service-related disabilities, from a random, national Canadian survey, who had been deployed overseas.
RESULTS:
PTSD severity was significantly related to gastrointestinal disorders, musculoskeletal problems, and headaches, but not to cardiovascular problems. Controlling for demographic factors did not affect PTSD's relationships with the three significant health conditions.
CONCLUSIONS:
The present study supports previous work in finding consistent relations between PTSD severity …
Switching And Selecting Atypical Antipsychotic Drugs: Quetiapine, Amresh Srivastava
Switching And Selecting Atypical Antipsychotic Drugs: Quetiapine, Amresh Srivastava
Psychiatry Presentations
No abstract provided.
Selecting Antidepressant Drugs For Management Of Depression In Primary Care (Part 1), Amresh Srivastava
Selecting Antidepressant Drugs For Management Of Depression In Primary Care (Part 1), Amresh Srivastava
Psychiatry Presentations
No abstract provided.
Selecting Antidepressant Drugs For Management Of Depression In Primary Care (Part 2), Amresh Srivastava
Selecting Antidepressant Drugs For Management Of Depression In Primary Care (Part 2), Amresh Srivastava
Psychiatry Presentations
No abstract provided.
Switching And Selecting Atypical Antipsychotic Drugs: Paliperidone, Amresh Srivastava
Switching And Selecting Atypical Antipsychotic Drugs: Paliperidone, Amresh Srivastava
Psychiatry Presentations
No abstract provided.
Mitogen-Activated Protein Kinase (Mapk) Pathways Mediate Embryonic Responses To Culture Medium Osmolarity By Regulating Aquaporin 3 And 9 Expression And Localization, As Well As Embryonic Apoptosis., Christine E Bell, Nathalie M K Larivière, Patricia H Watson, Andrew J Watson
Mitogen-Activated Protein Kinase (Mapk) Pathways Mediate Embryonic Responses To Culture Medium Osmolarity By Regulating Aquaporin 3 And 9 Expression And Localization, As Well As Embryonic Apoptosis., Christine E Bell, Nathalie M K Larivière, Patricia H Watson, Andrew J Watson
Obstetrics & Gynaecology Publications
BACKGROUND: In order to advance the development of culture conditions and increase the potential for supporting normal preimplantation embryo development in vitro, it is critical to define the mechanisms that early embryos utilize to survive in culture. We investigated the mechanisms that embryos employ in response to culture medium osmolarity. We hypothesized that mitogen-activated protein kinase (MAPK) pathways mediate responses to hyperosmotic stress by regulating Aquaporin (AQP) 3 and 9 expression as well as embryonic apoptosis.
METHODS: Real-time reverse transcription and polymerase chain reaction and whole-mount immunofluorescence were used to determine the relative mRNA levels and protein localization patterns of …
The Determinants Of First Nation And Inuit Health: A Critical Population Health Approach, Chantelle A.M. Richmond, Nancy A. Ross
The Determinants Of First Nation And Inuit Health: A Critical Population Health Approach, Chantelle A.M. Richmond, Nancy A. Ross
Aboriginal Policy Research Consortium International (APRCi)
Environmental dispossession disproportionately affects the health of Canada’s Aboriginal population, yet little is known about how its effects are sustained over time. We use a critical population health approach to explore the determinants of health in rural and remote First Nation and Inuit communities, and to conceptualize the pathways by which environmental dispossession affects these health determinants. We draw from narrative analysis of interviews with 26 Community Health Representa- tives (CHRs) from First Nation and Inuit communities across Canada. CHRs identified six health determinants: balance, life control, education, material resources, social resources, and environmental/ cultural connections. CHRs articulated the role …
A Dominant Loss-Of-Function Gja1 (Cx43) Mutant Impairs Parturition In The Mouse, Dan Tong, Xuerong Lu, Hong-Xing Wang, Isabelle Plante, Ed Lui, Dale W. Laird, Donglin Bai, Gerald M. Kidder
A Dominant Loss-Of-Function Gja1 (Cx43) Mutant Impairs Parturition In The Mouse, Dan Tong, Xuerong Lu, Hong-Xing Wang, Isabelle Plante, Ed Lui, Dale W. Laird, Donglin Bai, Gerald M. Kidder
Physiology and Pharmacology Publications
Expression of GJA1 (commonly known as connexin43 or Cx43), a major myometrial gap junction protein, is upregulated before the onset of delivery, suggesting an essential role for Cx43-mediated gap junctional intercellular communication (GJIC) in normal uterine contraction during parturition. To determine how a disease-linked Cx43 mutation affects myometrial function, we studied a mutant mouse model carrying an autosomal dominant mutation (Gja1Jrt) in the gene encoding Cx43 that displays features of the human genetic disease oculodentodigital dysplasia. We found that Cx43 level, specifically the phosphorylated species of the protein, is significantly reduced in the myometrium of the mutant mice (Gja1Jrt/+), as …
Filtering Out The Noise: Evaluating The Impact Of Noise And Sound Reduction Strategies On Sleep Quality For Icu Patients, Karen J. Bosma, V. Marco Ranieri
Filtering Out The Noise: Evaluating The Impact Of Noise And Sound Reduction Strategies On Sleep Quality For Icu Patients, Karen J. Bosma, V. Marco Ranieri
Department of Medicine Publications
The review article by Xie and colleagues examines the impact of noise and noise reduction strategies on sleep quality for critically ill patients. Evaluating the impact of noise on sleep quality is challenging, as it must be measured relative to other factors that may be more or less disruptive to patients' sleep. Such factors may be difficult for patients, observers, and polysomnogram interpreters to identify, due to our limited understanding of the causes of sleep disruption in the critically ill, as well as the challenges in recording and quantifying sleep stages and sleep fragmentation in the intensive care unit. Furthermore, …
Baseline Serum Prolactinin Drug Naïve First Episode Schizophrenia Predicts A Positive Clinical And Social Outcome At Five Years, Post Discharge Follow-Up, Amresh Srivastava, Manoj Tamhane, Meghana Thakar, Yves Bureau, Nilesh Shah
Baseline Serum Prolactinin Drug Naïve First Episode Schizophrenia Predicts A Positive Clinical And Social Outcome At Five Years, Post Discharge Follow-Up, Amresh Srivastava, Manoj Tamhane, Meghana Thakar, Yves Bureau, Nilesh Shah
Psychiatry Presentations
Serum prolactinis an indicator of tuberoinfundibulardopamine activity. It is reported to increase in wide variety of mental illnesses. It has close relationship with antipsychotic therapy. However, its relationship with psychopathology and outcome is not clear. Serum prolactinlevel was measured in 30 male and 30 female drug naive patients of schizophrenia. Subsequently, these patients were treated with antipsychotics. The severity of psychopathology at the baseline and subsequent improvement at the end of 3 weeks and 6 weeks was assessed on modified brief psychiatric rating scale (mBPRS). Available to follow up at five years 18 males & 22 females patients were reassessed …
Coping Up Challenges Of Risk Assessment: Towards A New Scale: Sis-Map, Amresh Srivastava, Charles Nelson
Coping Up Challenges Of Risk Assessment: Towards A New Scale: Sis-Map, Amresh Srivastava, Charles Nelson
Psychiatry Presentations
No abstract provided.