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result(s) for
"Sims, Matthew Thomas"
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Inconsistent selection of outcomes and measurement devices found in shoulder arthroplasty research: An analysis of studies on ClinicalTrials.gov
by
Sims, Matthew Thomas
,
Vassar, Matt
,
Howard, Benjamin McKinnley
in
Arthritis
,
Arthroplasty
,
Arthroplasty, Replacement
2017
Recent evidence suggests a lack of standardization of shoulder arthroplasty outcomes. This issue is a limiting factor in systematic reviews. Core outcome set (COS) methodology could address this problem by delineating a minimum set of outcomes for measurement in all shoulder arthroplasty trials.
A ClinicalTrials.gov search yielded 114 results. Eligible trials were coded on the following characteristics: study status, study type, arthroplasty type, sample size, measured outcomes, outcome measurement device, specific metric of measurement, method of aggregation, outcome classification, and adverse events.
Sixty-six trials underwent data abstraction and data synthesis. Following abstraction, 383 shoulder arthroplasty outcomes were organized into 11 outcome domains. The most commonly reported outcomes were shoulder outcome score (n = 58), pain (n = 33), and quality of life (n = 15). The most common measurement devices were the Constant-Murley Shoulder Outcome Score (n = 38) and American Shoulder and Elbow Surgeons Shoulder Score (n = 33). Temporal patterns of outcome use was also found.
Our study suggests the need for greater standardization of outcomes and instruments. The lack of consistency across trials indicates that developing a core outcome set for shoulder arthroplasty trials would be worthwhile. Such standardization would allow for more effective comparison across studies in systematic reviews, while at the same time consider important outcomes that may be underrepresented otherwise. This review of outcomes provides an evidence-based foundation for the development of a COS for shoulder arthroplasty.
Journal Article
Shoulder Arthroplasty Trials Are Infrequently Registered: A Systematic Review of Trials
by
Sims, Matthew Thomas
,
Herrington, James Murphy
,
Scheckel, Caleb Josiah
in
Analysis
,
Arthroplasty
,
Bias
2016
With the intent of improving transparency in clinical research, the International Committee of Medical Journal Editors (ICMJE) established guidelines in 2005 regarding prospective clinical trial registration. This action worked to address bias related to selective outcome reporting in the medical literature. The objective of this study was to assess and characterize the quality of registration of clinical trials appearing in shoulder arthroplasty-related medical journals.
All randomized trials involving human subjects, pertaining to shoulder arthroplasty, published between July 1, 2005 and December 31, 2015, and indexed in either PubMed or SportDISCUS were analyzed. We assessed the prevalence of registration, the timing of registration relative to patient enrollment periods, and the variable rates of orthopedic journal compliance with ICMJE and Food and Drug Administration clinical registration standards for our study.
Of the 382 articles identified, 345 (90.3%) were excluded due to failure to meet inclusion criteria. From the remaining 37, only 12 (32.4%) studies were found to be registered in a trial registry. Ten (10/12, 83.3%) of these provided their registration information within the body of the article. None of the included studies from ICMJE-recognized journals were registered. From 34 included studies from non-ICMJE recognized journals, 12 (35.3%) were registered.
The level of compliance with clinical trial registration guidelines in the decade since their release among shoulder arthroplasty trials in orthopedic journals is poor. Given the importance of the issue, the prevalence of the problem, and the fact that many other medical specialties have already made efforts to improve ICMJE compliance, further work on the part of orthopedic surgery journal authors and editors is needed to ensure the publication of unbiased results.
UMIN000022487.
Journal Article
Schroeder Faces Electoral Setback --- Likely Defeat in Two States Could Sap Leader's Clout In German Legislature
by
By Matthew Karnitschnig and G. Thomas Sims
in
Budget deficits
,
Gross Domestic Product
,
State elections
2003
Mr. [Hans Eichel] has tried to keep spending under control even as lower tax revenue and growing unemployment have left gaping holes in public finances. Once one of the most popular members of Mr. [Gerhard Schroeder]'s cabinet, Mr. Eichel has lost influence within the government after failing to predict the shortfalls and has even been accused of lying about the budget deficit. Mr. Eichel has denied lying. Nevertheless, his thriftiness and commitment to the Growth and Stability Pact have won the respect of many in the financial community who regard him as their lone ally in the government. National politics rarely play a central role in state elections, but the sore state of Germany's economy has put Mr. Schroeder's policies at the top of the agenda in campaigns in both the state of Hesse, which includes the city of Frankfurt, and Lower Saxony, Mr. Schroeder's home state. Eight of 10 Germans say they are dissatisfied with the performance of the government. According to one recent opinion poll, satisfaction with Mr. Schroeder's performance has plummeted to 32% from 65% in September. Mr. Eichel's approval rating has dropped to 28% from 55% during the same period. In September, Mr. Schroeder staged a dramatic come-from-behind victory by vowing not to take part in a U.S.-led war against Iraq. The tactic worked so well, in fact, that the chancellor and his party colleagues have returned to the theme in the current campaign. \"Don't expect Germany to approve a resolution legitimizing war; don't expect it,\" Mr. Schroeder told an election rally last week. But this time around the Iraq issue has failed to resonate with the electorate. Many voters lost confidence in the government after it disclosed a few weeks after the September election that a major budget shortfall would force it to raise taxes. During the campaign, Mr. Schroeder assured voters public finances were in order. Still, with a solid majority of Germans against a war and Iraq in the headlines, Iraq might be the only issue that can still save the SPD from a debacle. \"Iraq is definitely a theme that matters,\" said Richard Hilmer, managing director of Infratest dimap, a German polling firm.
Newspaper Article
German Voters Could Deal a Blow to Schroeder --- Party's Defeat in State Polls Would Hobble Efforts To Restructure Economy
by
By Matthew Karnitschnig and G. Thomas Sims
in
Budget deficits
,
Coalition governments
,
Eichel, Hans
2003
Voters' disillusionment with Mr. [Gerhard Schroeder] on the economy could also prompt the German leader to seek to shore up his support through his stance on Iraq. His vocal opposition to U.S.-led military action in Iraq helped Mr. Schroeder stage a dramatic come-from-behind victory in September's national election. With a solid majority of Germans against a war, the chancellor and his party colleagues have returned to the theme in the current campaign. National politics rarely play a central role in state elections, but the sore state of Germany's economy has put Mr. Schroeder's policies at the top of the agenda in campaigns in both the state of Hesse, which includes the city of Frankfurt, and Lower Saxony, Mr. Schroeder's home state. Eight out of 10 Germans say they are dissatisfied with the performance of the government. According to one recent opinion poll, satisfaction with Mr. Schroeder's performance has fallen to 32% from 65% in September. Mr. [Hans Eichel]'s approval rating has dropped to 28% from 55% over that period.
Newspaper Article
Identifying Breeding Priorities for Blueberry Flavor Using Biochemical, Sensory, and Genotype by Environment Analyses
by
Pisaroglo de Carvalho, Melissa
,
Schwieterman, Michael L.
,
Guthart, Matthew J.
in
Analysis
,
Berries
,
Biochemistry
2015
Breeding for a subjective goal such as flavor is challenging, as many blueberry cultivars are grown worldwide, and identifying breeding targets relating to blueberry flavor biochemistry that have a high degree of genetic control and low environmental variability are priorities. A variety of biochemical compounds and physical characters induce the sensory responses of taste, olfaction, and somatosensation, all of which interact to create what is perceived flavor. The goal of this study was to identify the flavor compounds with a larger genetic versus environmental component regulating their expression over an array of cultivars, locations, and years. Over the course of three years, consumer panelists rated overall liking, texture, sweetness, sourness, and flavor intensity of 19 southern highbush blueberry (Vaccinium corymbosum hybrids) genotypes in 30 sensory panels. Significant positive correlations to overall liking of blueberry fruit (P<0.001) were found with sweetness (R2 = 0.70), texture (R2 = 0.68), and flavor (R2 = 0.63). Sourness had a significantly negative relationship with overall liking (R2 = 0.55). The relationship between flavor and texture liking was also linear (R2 = 0.73, P<0.0001) demonstrating interaction between olfaction and somatosensation. Partial least squares analysis was used to identify sugars, acids, and volatile compounds contributing to liking and sensory intensities, and revealed strong effects of fructose, pH, and several volatile compounds upon all sensory parameters measured. To assess the feasibility of breeding for flavor components, a three year study was conducted to compare genetic and environmental influences on flavor biochemistry. Panelists could discern genotypic variation in blueberry sensory components, and many of the compounds affecting consumer favor of blueberries, such as fructose, pH, β-caryophyllene oxide and 2-heptanone, were sufficiently genetically controlled that allocating resources for their breeding is worthwhile.
Journal Article
The Emperor’s New Clothes
by
Schultz, Sara
,
Keefer, Michael
,
Barron, Michelle
in
Adult
,
and Commentaries
,
Anti-Bacterial Agents - therapeutic use
2020
Abstract
Background
Vancomycin is the most commonly administered antibiotic in hospitalized patients, but optimal exposure targets remain controversial. To clarify the therapeutic exposure range, this study evaluated the association between vancomycin exposure and outcomes in patients with methicillin-resistant Staphylococcus aureus (MRSA) bacteremia.
Methods
This was a prospective, multicenter (n = 14), observational study of 265 hospitalized adults with MRSA bacteremia treated with vancomycin. The primary outcome was treatment failure (TF), defined as 30-day mortality or persistent bacteremia ≥7 days. Secondary outcomes included acute kidney injury (AKI). The study was powered to compare TF between patients who achieved or did not achieve day 2 area under the curve to minimum inhibitory concentration (AUC/MIC) thresholds previously found to be associated with lower incidences of TF. The thresholds, analyzed separately as co-primary endpoints, were AUC/MIC by broth microdilution ≥650 and AUC/MIC by Etest ≥320.
Results
Treatment failure and AKI occurred in 18% and 26% of patients, respectively. Achievement of the prespecified day 2 AUC/MIC thresholds was not associated with less TF. Alternative day 2 AUC/MIC thresholds associated with lower TF risks were not identified. A relationship between the day 2 AUC and AKI was observed. Patients with day 2 AUC ≤515 experienced the best global outcomes (no TF and no AKI).
Conclusions
Higher vancomycin exposures did not confer a lower TF risk but were associated with more AKI. The findings suggest that vancomycin dosing should be guided by the AUC and day 2 AUCs should be ≤515. As few patients had day 2 AUCs <400, further study is needed to define the lower bound of the therapeutic range.
A multicenter prospective study was performed to evaluate the relationship between day 2 vancomycin exposure profiles and outcomes in patients with methicillin-resistant Staphylococcus aureus bacteremia. The collective findings suggest that vancomycin dosing should be guided by the area under the curve (AUC) and day 2 AUCs should be maintained between 400 and 515.
Journal Article
SER-109, an Oral Microbiome Therapy for Recurrent Clostridioides difficile Infection
by
Lashner, Bret
,
McChalicher, Christopher W.J
,
Winkler, Jonathan A
in
Acids
,
Aged
,
Anti-Bacterial Agents - adverse effects
2022
A major challenge with the treatment of
Clostridioides difficile
infection is restoring the antibiotic-associated alterations of bowel flora to a state less hospitable to
C. difficile
. In this trial, a microbiome-replacement therapy, SER-109, was used to treat patients with recurrent
C. difficile
infection and was shown to reduce the risk of further recurrence.
Journal Article
Obesity Modulates Inflammation and Lipid Metabolism Oocyte Gene Expression: A Single-Cell Transcriptome Perspective
2017
Context:It is hypothesized that obesity adversely affects the ovarian environment, which can disrupt oocyte maturation and embryonic development.Objective:This study aimed to compare oocyte gene expression profiles and follicular fluid (FF) content from overweight/obese (OW) women and normal-weight (NW) women who were undergoing fertility treatments.Design:Using single-cell transcriptomic analyses, we investigated oocyte gene expression using RNA sequencing.Patients or Other Participants:Eleven OW women and 13 NW women undergoing fertility treatments were enrolled.Main Outcome Measures:Oocyte messenger RNA profiles as well as serum and FF hormone and lipid levels were assessed.Results:OW women had significantly higher body mass index, body fat percentage, and serum homeostatic model assessment−insulin resistance index compared with NW women (P < 0.01). Serum leptin and C-reactive protein (CRP) levels as well as FF leptin, CRP, and triglyceride levels were increased (P < 0.05) in OW compared with NW women. Oocytes from OW women had increased expression of proinflammatory (CXCL2; P = 0.071) and oxidative stress–related (DUSP1; P = 0.051) genes but had decreased expression of GAS7 (fat metabolism; P = 0.065), TXNIP (oxidative stress; P = 0.055), and transcription factors ID3 (P = 0.075) and TWIST1 (P = 0.099) compared with NW women.Conclusions:These findings provide evidence for the significant influence of body composition on oocyte transcript abundance in women undergoing hormonal induction to retrieve oocytes. They further identify the potential for maternal diet to influence oocyte gene expression. The preconception period is, therefore, an important window of opportunity to consider for lifestyle interventions.We studied oocyte mRNA profiles as well as serum and follicular fluid hormone and lipid levels in obese women compared with those in normal-weight women and found significant differences.
Journal Article
MERS-CoV and H5N1 influenza virus antagonize antigen presentation by altering the epigenetic landscape
by
Burnum-Johnson, Kristin E.
,
Waters, Katrina M.
,
Sims, Amy C.
in
60 APPLIED LIFE SCIENCES
,
Adaptive immunity
,
antigen
2018
Convergent evolution dictates that diverse groups of viruses will target both similar and distinct host pathways to manipulate the immune response and improve infection. In this study, we sought to leverage this uneven viral antagonism to identify critical host factors that govern disease outcome. Utilizing a systems-based approach, we examined differential regulation of IFN-γ–dependent genes following infection with robust respiratory viruses including influenza viruses [A/influenza/Vietnam/1203/2004 (H5N1-VN1203) and A/influenza/California/04/2009 (H1N1-CA04)] and coronaviruses [severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome CoV (MERS-CoV)]. Categorizing by function, we observed down-regulation of gene expression associated with antigen presentation following both H5N1-VN1203 and MERS-CoV infection. Further examination revealed global down-regulation of antigen-presentation gene expression, which was confirmed by proteomics for both H5N1-VN1203 and MERS-CoV infection. Importantly, epigenetic analysis suggested that DNA methylation, rather than histone modification, plays a crucial role in MERS-CoV–mediated antagonism of antigen presentation gene expression; in contrast, H5N1-VN1203 likely utilizes a combination of epigenetic mechanisms to target antigen presentation. Together, the results indicate a common mechanism utilized by H5N1-VN1203 and MERS-CoV to modulate antigen presentation and the host adaptive immune response.
Journal Article
A cross-disease resource of living human microglia identifies disease-enriched subsets and tool compounds recapitulating microglial states
2024
Human microglia play a pivotal role in neurological diseases, but we still have an incomplete understanding of microglial heterogeneity, which limits the development of targeted therapies directly modulating their state or function. Here, we use single-cell RNA sequencing to profile 215,680 live human microglia from 74 donors across diverse neurological diseases and CNS regions. We observe a central divide between oxidative and heterocyclic metabolism and identify microglial subsets associated with antigen presentation, motility and proliferation. Specific subsets are enriched in susceptibility genes for neurodegenerative diseases or the disease-associated microglial signature. We validate subtypes in situ with an RNAscope–immunofluorescence pipeline and high-dimensional MERFISH. We also leverage our dataset as a classification resource, finding that induced pluripotent stem cell model systems capture substantial in vivo heterogeneity. Finally, we identify and validate compounds that recapitulate certain subtypes in vitro, including camptothecin, which downregulates the signature of disease-enriched subtypes and upregulates a signature previously associated with Alzheimer’s disease.
Profiling >200,000 live human microglia from 74 donors across neurological diseases reveals 12 subtypes of microglia that were validated in situ. Camptothecin is also identified as a compound reducing disease-enriched microglial subsets.
Journal Article