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Articles 1 - 30 of 156
Full-Text Articles in Life Sciences
Delineation Of Precursors In Murine Spleen That Develop In Contact With Splenic Endothelium To Give Novel Dendritic-Like Cells., Jonathan Tan, Pravin Periasamy, Helen O'Neill
Delineation Of Precursors In Murine Spleen That Develop In Contact With Splenic Endothelium To Give Novel Dendritic-Like Cells., Jonathan Tan, Pravin Periasamy, Helen O'Neill
Jonathan Tan
Hematopoietic cell lineages are best described in terms of distinct progenitors with limited differentiative capacity. To distinguish cell lineages, it is necessary to define progenitors and induce their differentiation in vitro. We previously reported in vitro development of immature dendritic-like cells (DCs) in long-term cultures (LTCs) of murine spleen, and in cocultures of spleen or bone marrow (BM) over splenic endothelial cell lines derived from LTCs. Cells produced are phenotypically distinct CD11b(hi)CD11c(lo)CD8(-)MHC-II(-) cells, tentatively named L-DCs. Here we delineate L-DC progenitors as different from known DC progenitors in BM and DC precursors in spleen. The progenitor is contained within the …
Haematopoietic Stem Cells In Spleen Have Distinct Differentiative Potential For Antigen Presenting Cells., Jonathan Tan, Helen O'Neill
Haematopoietic Stem Cells In Spleen Have Distinct Differentiative Potential For Antigen Presenting Cells., Jonathan Tan, Helen O'Neill
Jonathan Tan
Dendritic cells (DC) are known to develop from macrophage dendritic progenitors (MDP) in bone marrow (BM), which give rise to conventional (c)DC and monocytes, both dominant antigen presenting cell (APC) subsets in spleen. This laboratory has however defined a distinct dendritic-like cell subset in spleen (L-DC), which can also be derived in long-term cultures of spleen. In line with the restricted in vitro development of only L-DC in these stromal cultures, we questioned whether self-renewing HSC or progenitors exist in spleen with restricted differentiative capacity for only L-DC. Neonatal spleen and BM were compared for their ability to reconstitute mice …
Body Mass Index Prevalence Estimates Of A Statewide Monitoring Initiative In Idaho, David Paul, Philip Scruggs, Grace Karp, Lynda Ransdell, Clay Robinson, Mike Lester, Laura Petranek, Helen Brown, Terry-Ann Gibson, Jane Shimon, Tyler Johnson, John Fitzpatrick, Kathy Browder, Zambak Sahin
Body Mass Index Prevalence Estimates Of A Statewide Monitoring Initiative In Idaho, David Paul, Philip Scruggs, Grace Karp, Lynda Ransdell, Clay Robinson, Mike Lester, Laura Petranek, Helen Brown, Terry-Ann Gibson, Jane Shimon, Tyler Johnson, John Fitzpatrick, Kathy Browder, Zambak Sahin
Jane Shimon
Given the significant health consequences associated with childhood obesity, many states have developed legislation to initiate school-based obesity monitoring programs. Idaho is one of many states without a monitoring program, so collaborations between the State Department of Education and four state universities were developed to institute a body mass index (BMI) monitoring program in grades 1, 3, 5, 7, 9, and 11.
Development Of Temperature Regulation In Nestling Tree Swallows, Richard Marsh
Development Of Temperature Regulation In Nestling Tree Swallows, Richard Marsh
Richard Marsh
No abstract provided.
Adaptations Of The Gray Catbird Dumetella Carolinensis To Long Distance Migration: Energy Stores And Substrate Concentrations In Plasma, Richard Marsh
Adaptations Of The Gray Catbird Dumetella Carolinensis To Long Distance Migration: Energy Stores And Substrate Concentrations In Plasma, Richard Marsh
Richard Marsh
The major body components (water, lean dry, and fat) were measured in the carcasses of Gray Catbirds from which the flight muscles had been removed. Birds were collected from May through October near Ann Arbor, Michigan and during September and October near Gainesville, Florida. Additionally, the glycogen content of muscle and liver and the concentrations of glucose and triglycerides in plasma were determined in catbirds sampled during fall migration in Florida. Catbirds attained maximum body masses of ∼50 g in Florida, largely due to the addition of fat. Relatively lean birds (∼3-4% body fat) in spring through fall weighed approximately …
Seasonal And Geographic Variation Of Cold Resistance In House Finches Carpodacus Mexicanus, William Dawson, Richard Marsh, William Buttemer, Cynthia Carey
Seasonal And Geographic Variation Of Cold Resistance In House Finches Carpodacus Mexicanus, William Dawson, Richard Marsh, William Buttemer, Cynthia Carey
Richard Marsh
The house finch (Carpodacus mexicanus) is resident in tropical and subtropical regions as well as in localities having relatively severe winters. The extent of its winter acclimatization was assessed in freshly captured individuals of this species from southern California and Colorado. In severe cold stress tests involving exposure to Tₐ < −60 C, the former did not remain homeothermic any longer in winter than in late spring, whereas the Colorado birds did (8.8 vs. 97.5 min; P < .001). The capacity for winter acclimatization evident in these Colorado individuals was correlated with modest winter fattening, a response lacking in those from southern …
The First Hypogean Dipluran From Portugal: Description Of A New Species Of The Genus Litocampa (Diplura: Campodeidae), Ana Reboleira, Alberto Sendra, Fernando Gonçalves, Pedro Oromí
The First Hypogean Dipluran From Portugal: Description Of A New Species Of The Genus Litocampa (Diplura: Campodeidae), Ana Reboleira, Alberto Sendra, Fernando Gonçalves, Pedro Oromí
Ana Sofia P.S. Reboleira
A new species of subterranean Campodeid Dipluran of the genus Litocampa mendesi n. sp. is described. Despite the presence of this genus in Spain, this is the first record in Portugal, and it is also the first Portuguese species of hypogean Diplura. The new species combines unique characters absent in the European and American species of the genus. Litocampa mendesi n. sp. was collected only in one part of a cave of the Jurassic karstic massif of Algarve, the southwesternmost part of the Iberian Peninsula. The morphological features of this species show some adaptations to hypogean life but not a …
Book Review Of "Natural Climate Variability And Global Warming: A Holocene Perspective" Edited By Richard W. Battarbee And Heather A. Binney, Shaily Menon
Shaily Menon
No abstract provided.
A New Species Of Pristimantis (Anura: Strabomantidae) From The Amazonian Lowlands Of Northern Peru, Edgar Lehr, Luis A.G. Gagliardi Urrutia, Jiri Moravec
A New Species Of Pristimantis (Anura: Strabomantidae) From The Amazonian Lowlands Of Northern Peru, Edgar Lehr, Luis A.G. Gagliardi Urrutia, Jiri Moravec
Edgar Lehr
Age And Sex Differences And 20-Year Trends (1986 To 2005) In Prehospital Delay In Patients Hospitalized With Acute Myocardial Infarction, Hoa Nguyen, Joel Gore, Jane Saczynski, Jorge Yarzebski, George Reed, Frederick Spencer, Robert Goldberg
Age And Sex Differences And 20-Year Trends (1986 To 2005) In Prehospital Delay In Patients Hospitalized With Acute Myocardial Infarction, Hoa Nguyen, Joel Gore, Jane Saczynski, Jorge Yarzebski, George Reed, Frederick Spencer, Robert Goldberg
Jorge L. Yarzebski
Background: The prompt administration of coronary reperfusion therapy for patients with an evolving acute myocardial infarction (AMI) is crucial in reducing mortality and the risk of serious clinical complications in these patients. However, long-term trends in extent of prehospital delay and factors affecting patient's care-seeking behavior remain relatively unexplored, especially in men and women of different ages. The objectives of this study were to examine the overall magnitude and 20-year trends (1986 to 2005) in duration of prehospital delay in middle-aged and elderly men and women hospitalized with AMI.
Methods and Results: The study sample consisted of 5967 residents of …
A Hypogean New Species Of Trechus Clairville, 1806 (Coleoptera, Carabidae) From Portugal And Considerations About The T. Fulvus Species Group, Ana Reboleira, Vicente Ortuño, Fernando Gonçalves, Pedro Oromí
A Hypogean New Species Of Trechus Clairville, 1806 (Coleoptera, Carabidae) From Portugal And Considerations About The T. Fulvus Species Group, Ana Reboleira, Vicente Ortuño, Fernando Gonçalves, Pedro Oromí
Ana Sofia P.S. Reboleira
A new hypogean ground beetle species, Trechus tatai n. sp. from the Montejunto karstic massif in Portugal is described. Morphological diagnostic characters of the imago are provided and the new species is included in the Trechus fulvus-group. Comments on the biogeography of hypogean carabid beetles in karstic areas of Portugal and an illustrated key to the males of the T. fulvus-group in the Iberian Peninsula are also included.
Potential For Kochia Prostrata And Perennial Grasses For Rangeland Rehabilitation Efforts In Jordan, Raed Al-Tabini, D. Bailey, B. Waldron, J. Libbin, M. Al-Oun, K. Al-Khlidi
Potential For Kochia Prostrata And Perennial Grasses For Rangeland Rehabilitation Efforts In Jordan, Raed Al-Tabini, D. Bailey, B. Waldron, J. Libbin, M. Al-Oun, K. Al-Khlidi
Raed Al-Tabini
Six varieties of forage kochia [Kochia prostrata (L.) Shad.], two Atriplex shrubs native to cold deserts in the western United States, and four drought-tolerant perennial grass varieties were seeded and evaluated under arid rangeland conditions in Jordan. Varieties were seeded in December 2007 and evaluated in August 2008 and June 2009 for frequency and height at two sites in arid rangeland areas of southern and northern Jordan. Conditions were very dry with the southern site (Qurain) receiving 110 mm and 73 mm of annual precipitation, and the northern site (Tal Rimah) receiving 58 and 43 mm during the winters of …
Is Philosophy Dead? Far From It, Charles Weijer
Rotman Institute Opening, Joseph Rotman, Janice Deakin, Jane Maienschein, Charles Weijer, Philip Kitcher
Rotman Institute Opening, Joseph Rotman, Janice Deakin, Jane Maienschein, Charles Weijer, Philip Kitcher
Charles Weijer
No abstract provided.
Brescia Informs Diners About Menu Options
Laboratory Studies In Integrated Principles Of Zoology, Lee Kats, Cleveland Hickman, Susan Keen
Laboratory Studies In Integrated Principles Of Zoology, Lee Kats, Cleveland Hickman, Susan Keen
Lee Kats
The 15th Edition of Laboratory Studies in Integrated Principles of Zoology uses a comprehensive, phylogenetic approach in emphasizing basic biological principles, animal form and function, and evolutionary concepts. This introductory lab manual is ideal for a one- or two-semester course. The new edition expertly combines up-to-date coverage with the clear writing style and dissection guides that have distinguished this manual from edition to edition.
Mechanistic And Signaling Analysis Of Muc4-Erbb2 Signaling Module: New Insights Into The Mechanism Of Ligand-Independent Erbb2 Activity, Goldi Kozloski
Mechanistic And Signaling Analysis Of Muc4-Erbb2 Signaling Module: New Insights Into The Mechanism Of Ligand-Independent Erbb2 Activity, Goldi Kozloski
Goldi A Kozloski
What Is The Number Needed To Treat When Exercise Training Heart Failure Patients?, Neil Smart
What Is The Number Needed To Treat When Exercise Training Heart Failure Patients?, Neil Smart
Neil Smart
Debate exists on the number needed to treat (NNT) to prevent one mortality with exercise training in heart failure patients. The primary aim of this work was to conduct a sensitivity analysis, removing outlying mortality data from a published meta-analysis of exercise training in heart failure patients. A sensitivity analysis was conducted by removing data from one randomized controlled trial that reported particularly high mortality rates and may be considered a data outlier. Annualized NNTs were subsequently calculated for mortality data from a meta-analysis of exercise training in heart failure patients. Sensitivity analysis showed that the mortality benefit reported by …
Cortactin Regulates Cell Migration Via Activation Of N-Wasp, Jennifer Kowalski, C. Egile, S. Gil, S. Snapper, R. Li, S. Thomas
Cortactin Regulates Cell Migration Via Activation Of N-Wasp, Jennifer Kowalski, C. Egile, S. Gil, S. Snapper, R. Li, S. Thomas
Jennifer Kowalski
Cortactin is an actin-associated scaffolding protein that regulates cell migration. Amplification of the human gene, EMS1, has been detected in breast, head and neck tumors, where it correlates with increased invasiveness. Cortactin can regulate actin dynamics directly via its N-terminal half, which can bind and activate the Arp2/3 complex. The C-terminal portion of cortactin, however, is thought to have limited function in its regulation of the actin polymerization machinery. In this report, we identify a role for the cortactin C-terminus in regulating cell migration and, more specifically, actin dynamics. Overexpression of either full-length cortactin or cortactin C-terminus is sufficient to …
Morphology Of Epithelial Cells Lining The Digestive Tract Of The Giant Keyhole Limpet, Megathura Crenulata (Mollusca; Vetigastropoda)., Gary Martin, Tracy Bessette, Alanna Martin, Christopher Oakes
Morphology Of Epithelial Cells Lining The Digestive Tract Of The Giant Keyhole Limpet, Megathura Crenulata (Mollusca; Vetigastropoda)., Gary Martin, Tracy Bessette, Alanna Martin, Christopher Oakes
Gary Martin
To understand the digestive functions in the giant keyhole limpet, it is important to know the types of cells present in each region of the gut and their roles in the secretion of digestive enzymes and absorption of nutrients. This study describes the morphology of cells lining the entire gut and identifies sites that may be secreting materials to aid digestion. Previous studies involving electron microscopy and enzyme analysis have focused on the salivary and digestive glands of several gastropods. Studies on the rest of the gut tract typically include only histological descriptions of the epithelia and although several types …
Münch, Morphology, Microfluidics – Our Structural Problem With The Phloem [Review Article], Michael Knoblauch, Winfried S. Peters
Münch, Morphology, Microfluidics – Our Structural Problem With The Phloem [Review Article], Michael Knoblauch, Winfried S. Peters
Winfried S. Peters
Body Mass Index, Treatment Practices, And Mortality In Patients With Acute Heart Failure, Timothy Fitzgibbons, Olga Hardy, Darleen Lessard, Joel Gore, Jorge Yarzebski, Robert Goldberg
Body Mass Index, Treatment Practices, And Mortality In Patients With Acute Heart Failure, Timothy Fitzgibbons, Olga Hardy, Darleen Lessard, Joel Gore, Jorge Yarzebski, Robert Goldberg
Jorge L. Yarzebski
OBJECTIVES: Obesity is associated with an increased risk of heart failure (HF). Among patients presenting with acute HF, however, differences in clinical characteristics, treatment regimens, and short-term prognosis of varying weights are largely unknown, particularly from a broader population-based perspective. METHODS: A total of 3722 patients admitted with acute HF to 11 greater Worcester (Massachusetts, USA) hospitals during 1995 and 2000 were categorized as being lean (n = 216), normal weight (n = 1465), overweight (n = 1007), or obese (n = 1034) at the time of hospitalization. RESULTS: Obese patients with decompensated HF were significantly younger (mean age = …
Thirty-Year Trends (1975 To 2005) In The Magnitude Of, Management Of, And Hospital Death Rates Associated With Cardiogenic Shock In Patients With Acute Myocardial Infarction: A Population-Based Perspective, Robert Goldberg, Frederick Spencer, Joel Gore, Darleen Lessard, Jorge Yarzebski
Thirty-Year Trends (1975 To 2005) In The Magnitude Of, Management Of, And Hospital Death Rates Associated With Cardiogenic Shock In Patients With Acute Myocardial Infarction: A Population-Based Perspective, Robert Goldberg, Frederick Spencer, Joel Gore, Darleen Lessard, Jorge Yarzebski
Jorge L. Yarzebski
BACKGROUND: Limited information is available about potentially changing and contemporary trends in the incidence and hospital death rates of cardiogenic shock complicating acute myocardial infarction. The objectives of our study were to examine 3-decade-long trends (1975 to 2005) in the incidence rates of cardiogenic shock complicating acute myocardial infarction, patient characteristics and treatment practices associated with this clinical complication, and hospital death rates in residents of a large central New England community hospitalized with acute myocardial infarction at all area medical centers.
METHODS AND RESULTS: The study population consisted of 13 663 residents of the Worcester (Mass) metropolitan area hospitalized …
Changes Over Time In The Use Of Aspirin In Patients Hospitalized With Acute Myocardial Infarction (1975 To 1997): A Population-Based Perspective, Elizabeth Jackson, Ramya Sivasubramian, Frederick Spencer, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg
Changes Over Time In The Use Of Aspirin In Patients Hospitalized With Acute Myocardial Infarction (1975 To 1997): A Population-Based Perspective, Elizabeth Jackson, Ramya Sivasubramian, Frederick Spencer, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg
Jorge L. Yarzebski
OBJECTIVE: The purpose of this study was to examine 2 decade-long trends in the use of aspirin and associated outcomes in patients hospitalized with acute myocardial infarction. BACKGROUND: Aspirin has been shown to be beneficial in the secondary prevention of AMI. However, little is known about changes over time in the use of aspirin in patients hospitalized with AMI and associated outcomes, particularly from a more generalizable population-based perspective. METHODS: We examined trends in aspirin use and hospital and long-term outcomes in 9336 metropolitan Worcester, Mass, residents hospitalized with validated AMI in all area hospitals between 1975 and 1997. RESULTS: …
Thirty-Year Trends (1975-2005) In The Magnitude, Patient Characteristics, And Hospital Outcomes Of Patients With Acute Myocardial Infarction Complicated By Ventricular Fibrillation, Robert Goldberg, Jorge Yarzebski, Frederick Spencer, Juan Zevallos, Darleen Lessard, Joel Gore
Thirty-Year Trends (1975-2005) In The Magnitude, Patient Characteristics, And Hospital Outcomes Of Patients With Acute Myocardial Infarction Complicated By Ventricular Fibrillation, Robert Goldberg, Jorge Yarzebski, Frederick Spencer, Juan Zevallos, Darleen Lessard, Joel Gore
Jorge L. Yarzebski
Limited contemporary data are available describing the incidence rates, hospital prognosis, and factors associated with the occurrence of ventricular fibrillation (VF) in patients hospitalized with acute myocardial infarction (AMI). The objectives of our study were to examine 3-decade-long trends (1975 to 2005) in the magnitude, predictors, and hospital case-fatality rates associated with VF in residents of a large New England metropolitan area hospitalized at all area medical centers with an uncomplicated AMI. The study population consisted of 7,472 residents of the Worcester (Massachusetts) metropolitan area hospitalized with an uncomplicated AMI in 15 annual periods from 1975 to 2005. The overall …
Temporal Trends (1975 Through 1990) In The Incidence And Case-Fatality Rates Of Primary Ventricular Fibrillation Complicating Acute Myocardial Infarction. A Communitywide Perspective, David Chiriboga, Jorge Yarzebski, Robert Goldberg, Joel Gore, Joseph Alpert
Temporal Trends (1975 Through 1990) In The Incidence And Case-Fatality Rates Of Primary Ventricular Fibrillation Complicating Acute Myocardial Infarction. A Communitywide Perspective, David Chiriboga, Jorge Yarzebski, Robert Goldberg, Joel Gore, Joseph Alpert
Jorge L. Yarzebski
BACKGROUND: As part of a population-based study of acute myocardial infarction, we examined changes over time in the incidence and in-hospital case-fatality rates of primary ventricular fibrillation complicating acute myocardial infarction. METHODS AND RESULTS: Patients with validated acute myocardial infarction hospitalized at 16 hospitals in the Worcester, Mass, metropolitan area between 1975 and 1990 comprised the study sample. During the 15-year study period, 5.1% of patients developed primary ventricular fibrillation in the setting of uncomplicated acute myocardial infarction, with this rate remaining relatively constant over time. Both age- and multivariable-adjusted analyses showed no significant trend in the incidence rates of …
Temporal Trends And Associated Factors Of Inpatient Cardiac Rehabilitation In Patients With Acute Myocardial Infarction: A Community-Wide Perspective, Frederick Spencer, Bobak Salami, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg
Temporal Trends And Associated Factors Of Inpatient Cardiac Rehabilitation In Patients With Acute Myocardial Infarction: A Community-Wide Perspective, Frederick Spencer, Bobak Salami, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg
Jorge L. Yarzebski
PURPOSE: Cardiac rehabilitation (CR) has been shown to be an important therapeutic intervention after the development of acute myocardial infarction (AMI), but historically has been underused. Inpatient CR often represents cardiac patients' first exposure to risk factor modification education and acts as a gateway to outpatient programs. METHODS: The authors performed a longitudinal study of the use of inpatient CR in 5204 Worcester residents hospitalized with validated AMI in seven 1-year periods between 1986 and 1997. RESULTS: The overall rate of referral to inpatient CR was 68%, with a slight decline in use to less than 60% in the authors' …
Communitywide Trends In The Use And Outcomes Associated With Beta-Blockers In Patients With Acute Myocardial Infarction: The Worcester Heart Attack Study, Helme Silvet, Frederick Spencer, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg
Communitywide Trends In The Use And Outcomes Associated With Beta-Blockers In Patients With Acute Myocardial Infarction: The Worcester Heart Attack Study, Helme Silvet, Frederick Spencer, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg
Jorge L. Yarzebski
BACKGROUND: Despite the benefits associated with beta-blocker therapy in patients with acute myocardial infarction (AMI), limited recent data are available describing the extent of use of this therapy and the associated hospital and long-term outcomes, particularly from the perspective of a population-based study. Data are also limited about the characteristics of patients with AMI who do not receive beta-blockers. This study examines more than 2 decades of trends in the use of beta-blockers in hospitalized patients with AMI. METHODS: Communitywide study of 10,374 patients hospitalized with confirmed AMI in all metropolitan Worcester hospitals during 12 annual periods between 1975 and …
The Impact Of The Stent Era On The Management Strategy For Acute Myocardial Infarction: A Population-Based Perspective, Harold Dauerman, Robert Goldberg, Jorge Yarzebski, Darleen Lessard, Joel Gore
The Impact Of The Stent Era On The Management Strategy For Acute Myocardial Infarction: A Population-Based Perspective, Harold Dauerman, Robert Goldberg, Jorge Yarzebski, Darleen Lessard, Joel Gore
Jorge L. Yarzebski
We determined trends in the use of invasive diagnostic and revascularization strategies from a multihospital community-wide perspective for patients suffering acute myocardial infarction (AMI). Comparing 3,824 patients treated in the prestent era (1986-1993) to 1,915 patients hospitalized during the stent era (1995-1997), there was a significant increase in the use of invasive procedures and revascularization techniques across a broad spectrum of AMI patients during their index hospitalization. This resulted in a higher-risk profile of patients referred for invasive management of AMI in the stent era. Cathet. Cardiovasc. Intervent. 51:255-258, 2000.
Multidecade-Long Trends (1986-2005) In The Utilization Of Coronary Reperfusion And Revascularization Treatment Strategies In Patients Hospitalized With Acute Myocardial Infarction: A Community-Wide Perspective, Jared Wasser, Robert Goldberg, Frederick Spencer, Jorge Yarzebski, Joel Gore
Multidecade-Long Trends (1986-2005) In The Utilization Of Coronary Reperfusion And Revascularization Treatment Strategies In Patients Hospitalized With Acute Myocardial Infarction: A Community-Wide Perspective, Jared Wasser, Robert Goldberg, Frederick Spencer, Jorge Yarzebski, Joel Gore
Jorge L. Yarzebski
OBJECTIVES: The objectives of our community-wide investigation were to describe multidecade-long trends (1986-2005) in the utilization of thrombolytic therapy, percutaneous coronary interventions, and coronary artery bypass graft surgery in patients hospitalized with acute myocardial infarction (AMI). METHODS: The study sample consisted of 9422 greater Worcester (MA) residents hospitalized with confirmed AMI at all metropolitan Worcester medical centers in 11 annual periods between 1986 and 2005. RESULTS: Increases in the utilization of percutaneous coronary interventions were observed between 1986 (2.0%) and 2005 (50.7%) with the most rapid increases beginning in the late 1990s. Utilization of coronary artery bypass graft surgery during …