227 results on '"Simmons DL"'
Search Results
2. COX-2 inhibition, apoptosis, and chemoprevention by nonsteroidal anti-inflammatory drugs
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Simmons Dl and Moore Bc
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medicine.medical_specialty ,Programmed cell death ,Angiogenesis ,medicine.drug_class ,Apoptosis ,Crystallography, X-Ray ,Biochemistry ,Anti-inflammatory ,Prostaglandin-endoperoxide synthase 2 ,chemistry.chemical_compound ,Mice ,Internal medicine ,Neoplasms ,Drug Discovery ,medicine ,Animals ,Humans ,Cyclooxygenase Inhibitors ,Pharmacology ,biology ,Cyclooxygenase 2 Inhibitors ,Molecular Structure ,Neovascularization, Pathologic ,Organic Chemistry ,Anti-Inflammatory Agents, Non-Steroidal ,Membrane Proteins ,Isoenzymes ,Disease Models, Animal ,Endocrinology ,Mechanism of action ,chemistry ,Tumor progression ,Cyclooxygenase 2 ,Prostaglandin-Endoperoxide Synthases ,Cancer research ,biology.protein ,Molecular Medicine ,Cyclooxygenase ,medicine.symptom - Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) have as their common mechanism the inhibition of cyclooxygenase (COX) enzymes, of which two isoforms (COX-1 and COX-2) exist. The effect of NSAIDs on chemoprevention and tumor regression has been shown in animal models, epidemiologic studies, and in treatment of patients. The exact biochemical and cellular mechanisms underlying each of these phenomena is only partially understood. Processes that have been recently implicated as being important include the inhibition of tumor cell growth, prevention of angiogenesis, and induction of apoptosis in neoplastic cells.
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- 2000
3. Alternatively spliced variants of the cell adhesion molecule CD44 and tumour progression in colorectal cancer
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Gotley, DC, primary, Fawcett, J, additional, Walsh, MD, additional, Reeder, JA, additional, Simmons, DL, additional, and Antalis, TM, additional
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- 1996
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4. The N-domain of the biliary glycoprotein (BGP) adhesion molecule mediates homotypic binding: domain interactions and epitope analysis of BGPc
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Teixeira, AM, primary, Fawcett, J, additional, Simmons, DL, additional, and Watt, SM, additional
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- 1994
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5. CD66 identifies the biliary glycoprotein (BGP) adhesion molecule: cloning, expression, and adhesion functions of the BGPc splice variant
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Watt, SM, primary, Fawcett, J, additional, Murdoch, SJ, additional, Teixeira, AM, additional, Gschmeissner, SE, additional, Hajibagheri, NM, additional, and Simmons, DL, additional
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- 1994
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6. The heparin binding PECAM-1 adhesion molecule is expressed by CD34+ hematopoietic precursor cells with early myeloid and B-lymphoid cell phenotypes
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Watt, SM, primary, Williamson, J, additional, Genevier, H, additional, Fawcett, J, additional, Simmons, DL, additional, Hatzfeld, A, additional, Nesbitt, SA, additional, and Coombe, DR, additional
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- 1993
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7. Molecular cloning of CD68, a human macrophage marker related to lysosomal glycoproteins
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Holness, CL, primary and Simmons, DL, additional
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- 1993
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8. Depression predicts all-cause mortality: epidemiological evaluation from the ACCORD HRQL substudy.
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Sullivan MD, O'Connor P, Feeney P, Hire D, Simmons DL, Raisch DW, Fine LJ, Narayan KM, Ali MK, Katon WJ, Sullivan, Mark D, O'Connor, Patrick, Feeney, Patricia, Hire, Don, Simmons, Debra L, Raisch, Dennis W, Fine, Lawrence J, Narayan, K M Venkat, Ali, Mohammad K, and Katon, Wayne J
- Abstract
Objective: Depression affects up to 20-25% of adults with type 2 diabetes and may increase all-cause mortality, but few well-designed studies have examined the effects of depression on the full range of cardiovascular disease outcomes in type 2 diabetes.Research Design and Methods: A total of 2,053 participants in the ACCORD (Action to Control Cardiovascular Risk in Diabetes) Health-Related Quality of Life substudy completed the Patient Health Questionnaire (PHQ)-9 measure of depression symptoms at baseline and 12, 36, and 48 months. Cox proportional hazards regression models were used to estimate hazard ratios (HRs) (95% CI) for the time-varying impact of depression on protocol-defined clinical outcomes with and without adjustment for demographic, trial-related, clinical, and behavioral variables.Results: In fully adjusted models, depression was not significantly related to the ACCORD primary composite outcome (cardiovascular death, nonfatal heart attack, or stroke) (HR 1.53 [95% CI 0.85-2.73]) or to the ACCORD microvascular composite outcome (0.93 [0.53-1.62]), but all-cause mortality was significantly increased both in those with PHQ-assessed probable major depression (2.24 [1.24-4.06]) and PHQ score of ≥ 10 (1.84 [1.17-2.89]). The effect of depression on all-cause mortality was not related to previous cardiovascular events or to assignment to intensive or standard glycemia control. Probable major depression (by PHQ-9) had a borderline impact on the ACCORD macrovascular end point (1.42 [0.99-2.04]).Conclusions: Depression increases the risk of all-cause mortality and may increase the risk of macrovascular events among adults with type 2 diabetes at high risk for cardiovascular events. [ABSTRACT FROM AUTHOR]- Published
- 2012
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9. Long-term effects of incident diabetes mellitus on cardiovascular outcomes in people treated for hypertension: the ALLHAT Diabetes Extension Study.
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Barzilay JI, Davis BR, Pressel SL, Cutler JA, Einhorn PT, Black HR, Cushman WC, Ford CE, Margolis KL, Moloo J, Oparil S, Piller LB, Simmons DL, Sweeney ME, Whelton PK, Wong ND, Wright JT Jr, ALLHAT Collaborative Research Group, Barzilay, Joshua I, and Davis, Barry R
- Abstract
Background: Thiazide-type diuretics are associated with an increased incidence of diabetes compared with other antihypertensive medications. In this study, we determined the long-term cardiovascular disease (CVD) consequences of incident diuretic-associated diabetes compared with the effects of incident diabetes associated with calcium channel blocker and angiotensin-converting enzyme inhibitor use.Methods and Results: A total of 22 418 participants from the ALLHAT (Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial) with baseline diabetes, incident diabetes (7.5% with chlorthalidone, 5.6% with amlodipine, and 4.3% with lisinopril), or no diabetes at 2 years of in-trial follow-up were followed for a mean total of 6.9 years (2.9 years in-trial and 4 additional years posttrial) through the use of national databases. The primary outcome was CVD mortality (death from coronary heart disease [CHD], stroke, heart failure, or other CVD). Among other outcomes were all-cause mortality, non-CVD mortality, and CHD (nonfatal myocardial infarction or fatal CHD). Participants on chlorthalidone with incident diabetes versus no diabetes had consistently lower, nonsignificant risk for CVD mortality (hazard ratio [HR], 1.04; 95% CI, 0.74-1.47), all-cause mortality (HR, 1.04; 95% CI, 0.82-1.30), and non-CVD mortality (HR, 1.05; 95% CI, 0.77-1.42) than participants on amlodipine or lisinopril with incident diabetes (HR range, 1.22-1.53). Participants with incident diabetes had elevated CHD risk compared with those with no diabetes (HR, 1.46; 95% CI, 1.09-1.96), but those on chlorthalidone had significantly lower risk than those on lisinopril (HR, 1.18 versus 2.57; P=0.04 for interaction).Conclusions: The findings suggest that thiazide-related incident diabetes has less adverse long-term CVD impact than incident diabetes that develops while on other antihypertensive medications. [ABSTRACT FROM AUTHOR]- Published
- 2012
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10. Effect of intensive glycemic lowering on health-related quality of life in type 2 diabetes: ACCORD trial.
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Anderson RT, Narayan KM, Feeney P, Goff D Jr, Ali MK, Simmons DL, Sperl-Hillen JA, Bigger T, Cuddihy R, O'Conner PJ, Sood A, Zhang P, Sullivan MD, Action to Control Cardiovascular Risk in Diabetes (ACCORD) Investigators, Anderson, Roger T, Narayan, K M Venkat, Feeney, Patricia, Goff, David Jr, Ali, Mohammed K, and Simmons, Debra L
- Abstract
Objective: To compare the effect of intensive versus standard glycemic control strategies on health-related quality of life (HRQL) in a substudy of the Action to Control Cardiovascular Risk in Diabetes (ACCORD) trial.Research Design and Methods: A randomly selected subsample of 2,053 ACCORD participants enrolled in the HRQL substudy was assessed at baseline and 12-, 36-, and 48-month visits. HRQL assessment included general health status (the 36-Item Short Form Health Survey [SF-36]), diabetes symptoms (the Diabetes Symptom Distress Checklist), depression (Patient Health Questionnaire [PHQ]-9), and treatment satisfaction (Diabetes Treatment Satisfaction Questionnaire [DTSQ]). Repeated-measures ANOVA models were used to estimate change in HRQL outcomes by treatment group over 48 months adjusting for model covariates. The effects of early discontinuation of the ACCORD intensive glycemic control arm on study results were explored.Results: A total of 1,956 (95%) completed the self-report HRQL instrument(s) at baseline. The intensive arm had a larger decrease in SF-36 physical health component score than the standard arm (-1.6 vs. -1.1, P = 0.0345). Treatment satisfaction (DTSQ) showed larger improvement with intensive than standard (P = 0.0004). There were no differences in mean scores of the Diabetes Symptom Checklist and PHQ-9. Effects of participant transition following discontinuation of the intensive arm on HRQL were not significant.Conclusions: The ACCORD trial strategy of intensive glycemic control did not lead to benefits in HRQL and was associated with modest improvement in diabetes treatment satisfaction. Thus patient acceptability was apparently not compromised with intensive and complex interventions such as those used in ACCORD. [ABSTRACT FROM AUTHOR]- Published
- 2011
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11. Galectin 3 induces a distinctive pattern of cytokine and chemokine production in rheumatoid synovial fibroblasts via selective signaling pathways.
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Filer A, Bik M, Parsonage GN, Fitton J, Trebilcock E, Howlett K, Cook M, Raza K, Simmons DL, Thomas AM, Salmon M, Scheel-Toellner D, Lord JM, Rabinovich GA, and Buckley CD
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OBJECTIVE: High expression of galectin 3 at sites of joint destruction in rheumatoid arthritis (RA) suggests that galectin 3 plays a role in RA pathogenesis. Previous studies have demonstrated the effects of galectins on immune cells, such as lymphocytes and macrophages. This study was undertaken to investigate the hypothesis that galectin 3 induces proinflammatory effects in RA by modulating the pattern of cytokine and chemokine production in synovial fibroblasts. METHODS: Matched samples of RA synovial and skin fibroblasts were pretreated with galectin 3 or tumor necrosis factor alpha (TNFalpha), and the levels of a panel of cytokines, chemokines, and matrix metalloproteinases (MMPs) were determined using enzyme-linked immunosorbent assays and multiplex assays. Specific inhibitors were used to dissect signaling pathways, which were confirmed by Western blotting and NF-kappaB activation assay. RESULTS: Galectin 3 induced secretion of interleukin-6 (IL-6), granulocyte-macrophage colony-stimulating factor, CXCL8, and MMP-3 in both synovial and skin fibroblasts. By contrast, galectin 3-induced secretion of TNFalpha, CCL2, CCL3, and CCL5 was significantly greater in synovial fibroblasts than in skin fibroblasts. TNFalpha blockade ruled out autocrine TNFalpha-stimulated induction of chemokines. The MAPKs p38, JNK, and ERK were necessary for IL-6 production, but phosphatidylinositol 3-kinase (PI 3-kinase) was required for selective CCL5 induction. NF-kappaB activation was required for production of both IL-6 and CCL5. CONCLUSION: Our findings indicate that galectin 3 promotes proinflammatory cytokine secretion by tissue fibroblasts. However, galectin 3 induces the production of mononuclear cell-recruiting chemokines uniquely from synovial fibroblasts, but not matched skin fibroblasts, via a PI 3-kinase signaling pathway. These data provide further evidence of the role of synovial fibroblasts in regulating the pattern and persistence of the inflammatory infiltrate in RA and suggest a new and important functional consequence of the observed high expression of galectin 3 in the rheumatoid synovium. [ABSTRACT FROM AUTHOR]
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- 2009
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12. Clinical outcomes by race in hypertensive patients with and without the metabolic syndrome: Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial (ALLHAT)
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Wright JT Jr, Harris-Haywood S, Pressel S, Barzilay J, Baimbridge C, Bareis CJ, Basile JN, Black HR, Dart R, Gupta AK, Hamilton BP, Einhorn PT, Haywood LJ, Jafri SZ, Louis GT, Whelton PK, Scott CL, Simmons DL, Stanford C, and Davis BR
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- 2008
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13. Thiazolidinediones and the risk of lung, prostate, and colon cancer in patients with diabetes.
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Govindarajan R, Ratnasinghe L, Simmons DL, Siegel ER, Midathada MV, Kim L, Kim PJ, Owens RJ, and Lang NP
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- 2007
14. Clinical outcomes in antihypertensive treatment of type 2 diabetes, impaired fasting glucose concentration, and normoglycemia: antihypertensive and lipid-lowering treatment to prevent heart attack trial (ALLHAT)
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Whelton PK, Barzilay J, Cushman WC, Davis BR, Iiamathi E, Kostis JB, Leenen FHH, Louis GT, Margolis KL, Mathis DE, Moloo J, Nwachuku C, Panebianco D, Parish DC, Pressel S, Simmons DL, Thadani U, and ALLHAT Collaborative Research Group
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- 2005
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15. Effect of intensive versus standard blood pressure control on depression and health-related quality of life in type 2 diabetes: the ACCORD trial.
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O'Connor PJ, Narayan KM, Anderson R, Feeney P, Fine L, Ali MK, Simmons DL, Hire DG, Sperl-Hillen JM, Katz LA, Margolis KL, Sullivan MD, O'Connor, Patrick J, Narayan, K M Venkat, Anderson, Roger, Feeney, Patricia, Fine, Larry, Ali, Mohammed K, Simmons, Debra L, and Hire, Don G
- Abstract
Objective: We tested the hypothesis that intensive (systolic blood pressure [SBP] <120 mmHg) rather than standard (SBP 130-139 mmHg) blood pressure (BP) control improves health-related quality of life (HRQL) in those with type 2 diabetes.Research Design and Methods: Subjects were 1,028 ACCORD (Action to Control Cardiovascular Risk in Diabetes) BP trial HRQL substudy participants who completed baseline and one or more 12-, 36-, or 48-month HRQL evaluations. Multivariable linear regression assessed impact of BP treatment assignment on change in HRQL.Results: Over 4.0 years of follow-up, no significant differences occurred in five of six HRQL measures. Those assigned to intensive (vs. standard) BP control had statistically significant worsening of the Medical Outcomes Study 36-item short-form health survey (SF36) physical component scores (-0.8 vs. -0.2; P = 0.02), but magnitude of change was not clinically significant. Findings persisted across all prespecified subgroups.Conclusions: Intensive BP control in the ACCORD trial did not have a clinically significant impact, either positive or negative, on depression or patient-reported HRQL. [ABSTRACT FROM AUTHOR]- Published
- 2012
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16. Monocyte antigen CD14 is a phospholipid anchored membrane protein
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Simmons, DL, Tan, S, Tenen, DG, Nicholson-Weller, A, and Seed, B
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A cDNA clone encoding the human monocyte antigen CD14 was isolated by transient expression in COS cells of a cDNA library prepared from phorbol diester-treated HL60 cells. RNA blot analysis showed abundant expression of a single mRNA species in mature monocytes and an increased expression of the mRNA following induction of differentiation in leukemic cell lines. The DNA blot hybridization pattern was consistent with a single-copy gene. The predicted amino acid sequence lacks the characteristic transmembrane domain and stop transfer motif of conventionally anchored membrane proteins. COS cells transfected with the CD14 cDNA released virtually all CD14 protein in soluble form following treatment with glycosyl phosphatidylinositol-specific phospholipase C, and CD14 immunoreactivity was absent from the affected monocytes of a patient with paroxysmal nocturnal hemoglobinuria (PNH). The data show that, to the limit of experimental sensitivity, all monocyte CD14 is joined to the plasma membrane by a phosphatidylinositol phospholipid.
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- 1989
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17. A distinct profile of six soluble adhesion molecules (ICAM-1, ICAM-3, VCAM-1, E-selectin, L-selectin and P-selectin) in rheumatoid arthritis
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Littler, AJ, Buckley, CD, Wordsworth, P, Collins, I, Martinson, J, and Simmons, DL
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- 1997
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18. ISOLATION OF CDNA CLONES ENCODING THE BETA-ISOZYME OF HUMAN DNA TOPOISOMERASE-II AND LOCALIZATION OF THE GENE TO CHROMOSOME 3P24
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Jenkins, Jr, Ayton, P., Jones, T., Davies, Sl, Simmons, Dl, Harris, Al, Denise Sheer, and Hickson, Id
19. Triple therapy in type 2 diabetes: insulin glargine or rosiglitazone added to combination therapy of sulfonylurea plus metformin in insulin-naive patients: response to Rosenstock et al.
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Hamid Z, Simmons DL, and Rosenstock J
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- 2006
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20. Couple-based lifestyle intervention to prevent type 2 diabetes: protocol for a randomised pilot trial.
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Whitaker M, Aguirre MC, Gutierrez Chavez M, Beaulieu E, Arones YB, Gershenoff D, Hinton K, Klein N, Munezerou Uwizeye J, Napia E, Ramos C, Tavake-Pasi OF, Villalta J, Wolfsfeld C, Witte B, Maxfield E, Raphael K, Simmons DL, Clark L, Sher T, Smith TW, and Baucom KJ
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- Adult, Humans, Pilot Projects, Randomized Controlled Trials as Topic, Life Style, Diabetes Mellitus, Type 2 prevention & control
- Abstract
Introduction: Type 2 diabetes is prevalent among US adults. Lifestyle interventions that modify health behaviours prevent or delay progression to diabetes among individuals at high risk. Despite the well-documented influence of individuals' social context on their health, evidence-based type 2 diabetes prevention interventions do not systematically incorporate participants' romantic partners. Involving partners of individuals at high risk for type 2 diabetes in primary prevention may improve engagement and outcomes of programmes. The randomised pilot trial protocol described in this manuscript will evaluate a couple-based lifestyle intervention to prevent type 2 diabetes. The objective of the trial is to describe the feasibility of the couple-based intervention and the study protocol to guide planning of a definitive randomised clinical trial (RCT)., Methods and Analysis: We used community-based participatory research principles to adapt an individual diabetes prevention curriculum for delivery to couples. This parallel two-arm pilot study will include 12 romantic couples in which at least one partner (ie, 'target individual') is at risk for type 2 diabetes. Couples will be randomised to either the 2021 version of the CDC's PreventT2 curriculum designed for delivery to individuals (six couples), or PreventT2 Together, the adapted couple-based curriculum (six couples). Participants and interventionists will be unblinded, but research nurses collecting data will be blinded to treatment allocation. Feasibility of the couple-based intervention and the study protocol will be assessed using both quantitative and qualitative measures., Ethics and Dissemination: This study has been approved by the University of Utah IRB (#143079). Findings will be shared with researchers through publications and presentations. We will collaborate with community partners to determine the optimal strategy for communicating findings to community members. Results will inform a subsequent definitive RCT., Trial Registration Number: NCT05695170., Competing Interests: Competing interests: All authors have completed the ICMJE uniform disclosure form at http://www.icmje.org/disclosure-of-interest/ and declare: DG’s institution has received consulting fees from Medtronic, Abbott, Novo Nordisk, Sanofi, and Eli Lilly and Optum and DG was also a past president of Association of Diabetes Care and Education Specialists: Minnesota state chapter; KH is the programme coordinator for the Special Diabetes Program for Indians, has received travel and conference funds through the Urban Indian Center of Salt Lake, and is the planning committee co-chair for the Association of Diabetes Care and Education Specialists Utah Annual Diabetes Update Conference; KB is a Representative-at-Large on the Association for Behavioral and Cognitive Therapies Board of Directors and was a Member-at-Large on the Society for a Science of Clinical Psychology Board of Directors; no other relationships or activities that could appear to have influenced the submitted work., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2023
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21. Insulin use in chronic kidney disease and the risk of hypoglycemic events.
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Grube D, Wei G, Boucher R, Abraham N, Zhou N, Gonce V, Carle J, Simmons DL, and Beddhu S
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- Aged, Female, Glomerular Filtration Rate, Humans, Male, Middle Aged, Propensity Score, Proportional Hazards Models, Renal Insufficiency, Chronic physiopathology, Risk Factors, Severity of Illness Index, Diabetes Mellitus, Type 2 complications, Diabetes Mellitus, Type 2 drug therapy, Hypoglycemia chemically induced, Hypoglycemic Agents adverse effects, Insulin adverse effects, Renal Insufficiency, Chronic complications
- Abstract
Background: We examined in persons with type 2 diabetes (T2D) whether the use of insulin and the risk of serious hypoglycemic events with insulin is higher in persons with more advanced CKD., Methods: In a national cohort of 855,133 veterans with T2D seen at Veteran Affairs clinics between Jan 1, 2008 and December 31, 2010 with at least two serum creatinine measurements, we defined insulin use from pharmacy records and serious hypoglycemic events by ICD-9/10 codes from emergency room visits or hospitalizations that occurred until December 31, 2016., Results: Mean age was 66 ± 11 years and 97% were men. Mean baseline eGFR was 73 ± 22 ml/min/1.73 m
2 . In a multivariable Cox regression model of those without insulin use at baseline (N = 653,200), compared to eGFR ≥90 group, eGFR < 30 group had higher hazard (HR 1.80, 95% CI 1.74 to 1.88) of subsequent insulin use. In a multivariable Cox model with propensity score matching for baseline insulin use (N = 305,570), both insulin use (HR 2.34, 95% CI 2.24 to 2.44) and advanced CKD (HR 2.28, 95% CI 2.07 to 2.51 for comparison of eGFR < 30 to eGFR ≥90 ml/min/1.73 m2 groups) were associated with increased risk of subsequent serious hypoglycemic events., Conclusions and Relevance: In T2D, more advanced CKD was associated with greater insulin use. Both insulin use and advanced CKD were risk factors for serious hypoglycemic events. The safety of insulin compared to newer glycemic agents in more advanced CKD needs further study., (© 2022. The Author(s).)- Published
- 2022
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22. BioID reveals an ATG9A interaction with ATG13-ATG101 in the degradation of p62/SQSTM1-ubiquitin clusters.
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Kannangara AR, Poole DM, McEwan CM, Youngs JC, Weerasekara VK, Thornock AM, Lazaro MT, Balasooriya ER, Oh LM, Soderblom EJ, Lee JJ, Simmons DL, and Andersen JL
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- Autophagy-Related Protein-1 Homolog genetics, Autophagy-Related Protein-1 Homolog metabolism, Autophagy-Related Proteins genetics, Autophagy-Related Proteins metabolism, Sequestosome-1 Protein genetics, Autophagy genetics, Ubiquitin
- Abstract
ATG9A, the only multi-pass transmembrane protein among core ATG proteins, is an essential regulator of autophagy, yet its regulatory mechanisms and network of interactions are poorly understood. Through quantitative BioID proteomics, we identify a network of ATG9A interactions that includes members of the ULK1 complex and regulators of membrane fusion and vesicle trafficking, including the TRAPP, EARP, GARP, exocyst, AP-1, and AP-4 complexes. These interactions mark pathways of ATG9A trafficking through ER, Golgi, and endosomal systems. In exploring these data, we find that ATG9A interacts with components of the ULK1 complex, particularly ATG13 and ATG101. Using knockout/reconstitution and split-mVenus approaches to capture the ATG13-ATG101 dimer, we find that ATG9A interacts with ATG13-ATG101 independently of ULK1. Deletion of ATG13 or ATG101 causes a shift in ATG9A distribution, resulting in an aberrant accumulation of ATG9A at stalled clusters of p62/SQSTM1 and ubiquitin, which can be rescued by an ULK1 binding-deficient mutant of ATG13. Together, these data reveal ATG9A interactions in vesicle-trafficking and autophagy pathways, including a role for an ULK1-independent ATG13 complex in regulating ATG9A., (© 2021 The Authors.)
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- 2021
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23. Combined Medicine-Pediatrics Fellowships: A Guide for Fellowship Directors and Residents.
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Shen BH, Vakharia J, Topor LS, Robbins B, Diamond-Falk K, Brown S, Mason K, Barron C, Simmons DL, McKown KM, and McLaughlin S
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Dual training in Internal Medicine-Pediatrics (MedPeds) was recognized by the American Board of Medical Specialties in 1967. Residents complete 24 months each in Internal Medicine and Pediatrics and are board-eligible for both at the conclusion of training. Graduates are eligible for fellowships in either or both fields. Many graduates pursue fellowship training. A small absolute number of graduates apply for dual training in adult and pediatric subspecialties, but those that do bring direct, in-depth clinical experience across the lifespan, and familiarity with care in both pediatric and adult settings. As such, they contribute unique perspectives and capabilities to their fellowship and future practice. This includes the ability to provide subspecialty care in settings with limited resources, where they are able to address needs without age restrictions, and in the transition of subspecialty care for emerging adults with childhood-onset conditions. Due to the small number of applicants pursuing joint adult and pediatric fellowships, many fellowship directors may have limited experience with dual fellowships but may want to create opportunities for these unique trainees. This summary was developed jointly by residents, fellows, MedPeds program directors, and fellowship directors in Pediatrics and Internal Medicine subspecialties, and approved by their respective leadership councils to offer some key points on common questions, suggest additional resources, and share best practices, with a goal of facilitating this process for fellowship programs and residents alike., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2021, Shen et al.)
- Published
- 2021
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24. The Role of Advocacy in Adapting the Diabetes Prevention Program for Couple-Based Delivery That Reaches Marginalized Groups.
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Aguirre MC, Brown H, Gershenoff D, Hinton KL, Huntzinger OM, Klein N, Ramos C, Tavake-Pasi OF, Witte B, Wolfsfeld M, Sher T, Simmons DL, Smith TW, Clark L, and Baucom KJW
- Published
- 2020
25. Skull base lymphoma with panhypopituitarism.
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Rios M, Wahl MP, Simmons DL, and Schlegel A
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- Aged, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Humans, Lymphoma complications, Lymphoma drug therapy, Male, Skull Base Neoplasms complications, Skull Base Neoplasms drug therapy, Hypopituitarism etiology, Lymphoma pathology, Skull Base Neoplasms pathology
- Published
- 2020
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26. Arterial stiffness and kidney disease progression in the systolic blood pressure intervention trial .
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Nowak KL, Chonchol M, Jovanovich A, You Z, Ambrosius WT, Cho ME, Glasser S, Lash J, Simmons DL, Taylor A, Weiner D, Rastogi A, Oparil S, and Supiano MA
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- Aged, Disease Progression, Humans, Middle Aged, Pulse Wave Analysis, Blood Pressure physiology, Renal Insufficiency, Chronic epidemiology, Renal Insufficiency, Chronic physiopathology, Vascular Stiffness physiology
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Aims: Arterial stiffness increases with both advancing age and chronic kidney disease (CKD) and may contribute to kidney function decline, but evidence is inconsistent. We hypothesized that greater baseline arterial stiffness (assessed as pulse pressure (PP) and carotid-femoral pulse-wave velocity CFPWV)) was independently associated with kidney disease progression over the follow-up period (3.8 years) in the Systolic Blood Pressure Intervention Trial (SPRINT)., Materials and Methods: 8,815 SPRINT participants were included in the analysis of PP. 592 adults who participated in a SPRINT ancillary study that measured CFPWV were included in subgroup analyses. Cox proportional hazards analysis was used to examine the association between PP and time to kidney disease progression endpoints: (A) incident estimated glomerular filtration rate (eGFR) < 60 mL/min/1.73m
2 in non-CKD participants at baseline; (B) 50% decline in eGFR, initiation of dialysis, or transplant in those with baseline CKD. Mixed model analyses examined the association of baseline PP/CFPWV with follow-up eGFR., Results and Conclusion: Mean ± SD age was 68 ± 10 years, baseline PP was 62 ± 14 mmHg, and CFPWV was 10.8 ± 2.7 m/s. In the fully adjusted model, PP ≥ median was associated with an increased hazard of kidney disease progression endpoints (HR: 1.93 (1.43 - 2.61)). The association remained significant in individuals without (2.05 (1.47 - 2.87)) but not with baseline CKD (1.28 (0.55 - 2.65)). In fully adjusted models, higher baseline PP associated with eGFR decline (p < 0.0001 (all, CKD, non-CKD)), but baseline CFPWV did not. Among older adults at high risk for cardiovascular events, baseline PP was associated with kidney disease progression.- Published
- 2020
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27. Raymond L. Erikson (1936-2020).
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Neel BG, Sweet L, Simmons DL, and Blenis J
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- 2020
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28. AAIM Guidelines for Interview and Post-Interview Communication for Graduate Medical Education Recruitment.
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Alweis RL, Williams CM, Luther VP, Simmons DL, Kopelman R, Angus SV, Liao S, Nagalla S, and Muchmore EA
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- Humans, Internship and Residency, United States, Communication, Education, Medical, Graduate, Guidelines as Topic, Interviews as Topic standards, Personnel Selection standards
- Published
- 2019
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29. Effect of Intensive and Standard Clinic-Based Hypertension Management on the Concordance Between Clinic and Ambulatory Blood Pressure and Blood Pressure Variability in SPRINT.
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Ghazi L, Pajewski NM, Rifkin DE, Bates JT, Chang TI, Cushman WC, Glasser SP, Haley WE, Johnson KC, Kostis WJ, Papademetriou V, Rahman M, Simmons DL, Taylor A, Whelton PK, Wright JT, Bhatt UY, and Drawz PE
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- Aged, Aged, 80 and over, Antihypertensive Agents therapeutic use, Blood Pressure Monitoring, Ambulatory methods, Humans, Hypertension drug therapy, Middle Aged, Patient Care Planning, Blood Pressure Determination methods, Hypertension diagnosis, Masked Hypertension diagnosis, White Coat Hypertension diagnosis
- Abstract
Background Blood pressure ( BP ) varies over time within individual patients and across different BP measurement techniques. The effect of different BP targets on concordance between BP measurements is unknown. The goals of this analysis are to evaluate concordance between (1) clinic and ambulatory BP , (2) clinic visit-to-visit variability and ambulatory BP variability, and (3) first and second ambulatory BP and to evaluate whether different clinic targets affect these relationships. Methods and Results The SPRINT (Systolic Blood Pressure Intervention Trial) ambulatory BP monitoring ancillary study obtained ambulatory BP readings in 897 participants at the 27-month follow-up visit and obtained a second reading in 203 participants 293±84 days afterward. There was considerable lack of agreement between clinic and daytime ambulatory systolic BP with wide limits of agreement in Bland-Altman plots of -21 to 34 mm Hg in the intensive-treatment group and -26 to 32 mm Hg in the standard-treatment group. Overall, there was poor agreement between clinic visit-to-visit variability and ambulatory BP variability with correlation coefficients for systolic and diastolic BP all <0.16. We observed a high correlation between first and second ambulatory BP ; however, the limits of agreement were wide in both the intensive group (-27 to 21 mm Hg) and the standard group (-23 to 20 mm Hg). Conclusions We found low concordance in BP and BP variability between clinic and ambulatory BP and second ambulatory BP . Results did not differ by treatment arm. These results reinforce the need for multiple BP measurements before clinical decision making.
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- 2019
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30. Serum Sodium and Pulse Pressure in SPRINT.
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Nowak KL, Chonchol M, Jovanovich A, You Z, Bates J, Foy C, Glasser S, Killeen AA, Kostis J, Rodriguez CJ, Segal M, Simmons DL, Taylor A, Lovato LC, Ambrosius WT, and Supiano MA
- Subjects
- Aged, Biomarkers blood, Carotid-Femoral Pulse Wave Velocity, Cross-Sectional Studies, Female, Humans, Hypertension diagnosis, Male, Middle Aged, Randomized Controlled Trials as Topic, Renal Insufficiency, Chronic blood, Renal Insufficiency, Chronic diagnosis, Renal Insufficiency, Chronic physiopathology, United States, Up-Regulation, Blood Pressure, Hypertension blood, Hypertension physiopathology, Sodium blood, Vascular Stiffness
- Abstract
Background: High dietary sodium intake may induce a small, yet physiologically relevant rise in serum sodium concentration, which associates with increased systolic blood pressure. Cellular data suggest that this association is mediated by increased endothelial cell stiffness. We hypothesized that higher serum sodium levels were associated with greater arterial stiffness in participants in the Systolic Blood Pressure Intervention Trial (SPRINT)., Methods: Multivariable linear regression was used to examine the association between baseline serum sodium level and (i) pulse pressure (PP; n = 8,813; a surrogate measure of arterial stiffness) and (ii) carotid-femoral pulse wave velocity (CFPWV; n = 591 in an ancillary study to SPRINT)., Results: Baseline mean ± SD age was 68 ± 9 years and serum sodium level was 140 ± 2 mmol/L. In the PP analysis, higher serum sodium was associated with increased baseline PP in the fully adjusted model (tertile 3 [≥141 mmol] vs. tertile 2 [139-140 mmol]; β = 0.87, 95% CI = 0.32 to 1.43). Results were similar in those with and without chronic kidney disease. In the ancillary study, higher baseline serum sodium was not associated with increased baseline CFPWV in the fully adjusted model (β = 0.35, 95% CI = -0.14 to 0.84)., Conclusions: Among adults at high risk for cardiovascular events but free from diabetes, higher serum sodium was independently associated with baseline arterial stiffness in SPRINT, as measured by PP, but not by CFPWV. These results suggest that high serum sodium may be a marker of risk for increased PP, a surrogate index of arterial stiffness., (© American Journal of Hypertension, Ltd 2019. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
- Published
- 2019
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31. Parental Leave in Graduate Medical Education: Recommendations for Reform.
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Vassallo P, Jeremiah J, Forman L, Dubois L, Simmons DL, Chretien K, Amin A, Coleman D, and Collichio F
- Subjects
- Clinical Competence, Fellowships and Scholarships, Health Workforce, Humans, Internship and Residency, Organizational Policy, Salaries and Fringe Benefits, Training Support, United States, Workload, Education, Medical, Graduate, Parental Leave
- Published
- 2019
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32. Long-Term Effects of Intensive Glycemic and Blood Pressure Control and Fenofibrate Use on Kidney Outcomes.
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Mottl AK, Buse JB, Ismail-Beigi F, Sigal RJ, Pedley CF, Papademetriou V, Simmons DL, Katz L, Mychaleckyj JC, and Craven TE
- Subjects
- Adult, Aged, Albuminuria etiology, Albuminuria urine, Blood Pressure, Creatinine blood, Creatinine urine, Diabetes Mellitus, Type 2 complications, Diabetes Mellitus, Type 2 physiopathology, Diabetic Nephropathies etiology, Diabetic Nephropathies therapy, Female, Glomerular Filtration Rate, Glycated Hemoglobin metabolism, Humans, Hypolipidemic Agents therapeutic use, Kidney Failure, Chronic etiology, Kidney Failure, Chronic physiopathology, Kidney Failure, Chronic therapy, Male, Middle Aged, Renal Dialysis, Simvastatin therapeutic use, Time Factors, Antihypertensive Agents therapeutic use, Diabetes Mellitus, Type 2 blood, Diabetes Mellitus, Type 2 drug therapy, Diabetic Nephropathies physiopathology, Fenofibrate therapeutic use, Hypoglycemic Agents therapeutic use
- Abstract
Background and Objectives: In people with type 2 diabetes, aggressive control of glycemia, BP, and lipids have resulted in conflicting short-term (<5 years) kidney outcomes. We aimed to determine the long-term kidney effects of these interventions., Design, Setting, Participants, & Measurements: The Action to Control Cardiovascular Risk in Diabetes (ACCORD) was a multifactorial intervention study in people with type 2 diabetes at high risk for cardiovascular disease ( n =10,251), to examine the effects of intensive glycemic control (hemoglobin A1c <6.0% versus 7%-7.9%), BP control (systolic BP <120 mm Hg versus <140 mm Hg) or fenofibrate versus placebo added to simvastatin on cardiovascular events and death. The glycemia trial lasted 3.7 years and participants were followed for another 6.5 years in ACCORDION, the ACCORD Follow-On Study. The post hoc primary composite kidney outcome was defined as incident macroalbuminuria, creatinine doubling, need for dialysis, or death by any cause. Cox proportional hazards regression estimated the effect of each intervention on the composite outcome and individual components. In secondary outcome analyses, competing risk regression was used to account for the risk of death in incident kidney outcomes. Analyses were adjusted for sociodemographics, randomization groups, and clinical factors., Results: There were 988 cases of incident macroalbuminuria, 954 with doubling of creatinine, 351 requiring dialysis, and 1905 deaths. Hazard ratios (HRs) for the composite outcome with intensive glycemic, BP control, and fenofibrate use compared with standard therapy were 0.92 (95% confidence interval [95% CI], 0.86 to 0.98), 1.16 (95% CI, 1.05 to 1.28), and 1.16 (95% CI, 1.06 to 1.27). Multivariable, secondary outcome analyses showed that in the glycemia trial, only macroalbuminuria was significantly decreased (HR, 0.68; 95% CI, 0.59 to 0.77). In the BP and lipid trials, only creatinine doubling was affected (HR, 1.64; 95% CI, 1.30 to 2.06 and HR, 2.00; 95% CI, 1.61 to 2.49, respectively)., Conclusions: In people with type 2 diabetes at high risk for cardiovascular disease, intensive glycemic control may result in a long-term reduction in macroalbuminuria; however, intensive BP control and fenofibrates may increase the risk for adverse kidney events., (Copyright © 2018 by the American Society of Nephrology.)
- Published
- 2018
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33. Correction: High prevalence of elevated blood lead levels in both rural and urban Iowa newborns: Spatial patterns and area-level covariates.
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Carrel M, Zahrieh D, Young SG, Oleson J, Ryckman KK, Wels B, Simmons DL, and Saftlas A
- Abstract
[This corrects the article DOI: 10.1371/journal.pone.0177930.].
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- 2018
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34. Antipyretic therapy: clinical pharmacology.
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Lee JJ and Simmons DL
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- Animals, Humans, Prostaglandins metabolism, Signal Transduction drug effects, Antipyretics therapeutic use, Fever drug therapy, Pharmacology, Clinical
- Abstract
Fever depends on a complex physiologic response to infectious agents and other conditions. To alleviate fever, many medicinal agents have been developed over a century of trying to improve upon aspirin, which was determined to work by inhibiting prostaglandin synthesis. We present the process of fever induction through prostaglandin synthesis and discuss the development of pharmaceuticals that target enzymes and receptors involved in prostaglandin-mediated signal transduction, including prostaglandin H
2 synthase (also known as cyclooxygenase), phospholipase A2 , microsomal prostaglandin E2 synthase-1, EP receptors, and transient potential cation channel subfamily V member 1. Clinical use of established antipyretics will be discussed as well as medicinal agents under clinical trials and future research., (Copyright © 2018 Elsevier B.V. All rights reserved.)- Published
- 2018
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35. Metabolic syndrome cluster does not provide incremental prognostic information in patients with stable cardiovascular disease: A post hoc analysis of the AIM-HIGH trial.
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Lyubarova R, Robinson JG, Miller M, Simmons DL, Xu P, Abramson BL, Elam MB, Brown TM, McBride R, Fleg JL, Desvigne-Nickens P, Ayenew W, and Boden WE
- Subjects
- Cardiovascular Diseases drug therapy, Female, Humans, Hydroxymethylglutaryl-CoA Reductase Inhibitors therapeutic use, Kaplan-Meier Estimate, Male, Middle Aged, Predictive Value of Tests, Prognosis, Cardiovascular Diseases complications, Cardiovascular Diseases diagnosis, Metabolic Syndrome complications
- Abstract
Background: Metabolic syndrome (MS) is a well-known risk factor for the development of cardiovascular (CV) disease; yet, controversy persists whether it adds incremental prognostic value in patients with established CV disease., Objectives: This study was performed to determine if MS is associated with worse CV outcomes in patients with established CV disease treated intensively with statins., Methods: We performed a post hoc analysis of the Atherothrombosis Intervention in Metabolic Syndrome with Low HDL/High Triglycerides and Impact on Global Health Outcomes trial, in which patients with established CV disease and atherogenic dyslipidemia (n = 3414) were randomly assigned to receive extended release niacin or placebo during a mean 36-month follow-up, to assess whether the presence of MS or the number of MS components contributed to CV outcomes., Results: The composite primary end point of CV events occurred in 15.1% of patients without MS vs 13.8%, 16.9%, and 16.8% of patients with MS in the subsets with 3, 4, and 5 MS components, respectively (corresponding adjusted hazard ratios 0.9, 1.1, and 1.1 relative to patients without MS), P = .55. Comparing subgroups with 3 vs 4 or 5 MS components, there was no significant difference in either the composite primary end point or secondary end points. Patients with diabetes mellitus had higher event rates, with or without the presence of MS., Conclusions: The presence of MS was not associated with worse CV outcomes in the AIM-HIGH population. The rate of CV events in statin-treated Atherothrombosis Intervention in Metabolic Syndrome with Low HDL/High Triglycerides and Impact on Global Health Outcomes patients with MS was not significantly influenced by the number of MS components., (Copyright © 2017 National Lipid Association. All rights reserved.)
- Published
- 2017
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36. Effect of Intensive Blood-Pressure Treatment on Patient-Reported Outcomes.
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Berlowitz DR, Foy CG, Kazis LE, Bolin LP, Conroy MB, Fitzpatrick P, Gure TR, Kimmel PL, Kirchner K, Morisky DE, Newman J, Olney C, Oparil S, Pajewski NM, Powell J, Ramsey T, Simmons DL, Snyder J, Supiano MA, Weiner DE, and Whittle J
- Subjects
- Aged, Antihypertensive Agents adverse effects, Blood Pressure drug effects, Drug Therapy, Combination, Female, Health Status, Humans, Hypertension complications, Male, Medication Adherence, Middle Aged, Patient Outcome Assessment, Patient Satisfaction, Antihypertensive Agents administration & dosage, Cardiovascular Diseases prevention & control, Hypertension drug therapy, Patient Reported Outcome Measures
- Abstract
Background: The previously published results of the Systolic Blood Pressure Intervention Trial showed that among participants with hypertension and an increased cardiovascular risk, but without diabetes, the rates of cardiovascular events were lower among those who were assigned to a target systolic blood pressure of less than 120 mm Hg (intensive treatment) than among those who were assigned to a target of less than 140 mm Hg (standard treatment). Whether such intensive treatment affected patient-reported outcomes was uncertain; those results from the trial are reported here., Methods: We randomly assigned 9361 participants with hypertension to a systolic blood-pressure target of less than 120 mm Hg or a target of less than 140 mm Hg. Patient-reported outcome measures included the scores on the Physical Component Summary (PCS) and Mental Component Summary (MCS) of the Veterans RAND 12-Item Health Survey, the Patient Health Questionnaire 9-item depression scale (PHQ-9), patient-reported satisfaction with their blood-pressure care and blood-pressure medications, and adherence to blood-pressure medications. We compared the scores in the intensive-treatment group with those in the standard-treatment group among all participants and among participants stratified according to physical and cognitive function., Results: Participants who received intensive treatment received an average of one additional antihypertensive medication, and the systolic blood pressure was 14.8 mm Hg (95% confidence interval, 14.3 to 15.4) lower in the group that received intensive treatment than in the group that received standard treatment. Mean PCS, MCS, and PHQ-9 scores were relatively stable over a median of 3 years of follow-up, with no significant differences between the two treatment groups. No significant differences between the treatment groups were noted when participants were stratified according to baseline measures of physical or cognitive function. Satisfaction with blood-pressure care was high in both treatment groups, and we found no significant difference in adherence to blood-pressure medications., Conclusions: Patient-reported outcomes among participants who received intensive treatment, which targeted a systolic blood pressure of less than 120 mm Hg, were similar to those among participants who received standard treatment, including among participants with decreased physical or cognitive function. (Funded by the National Institutes of Health; SPRINT ClinicalTrials.gov number, NCT01206062 .).
- Published
- 2017
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37. Effect of Intensive Versus Standard Blood Pressure Treatment According to Baseline Prediabetes Status: A Post Hoc Analysis of a Randomized Trial.
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Bress AP, King JB, Kreider KE, Beddhu S, Simmons DL, Cheung AK, Zhang Y, Doumas M, Nord J, Sweeney ME, Taylor AA, Herring C, Kostis WJ, Powell J, Rastogi A, Roumie CL, Wiggers A, Williams JS, Yunis R, Zias A, Evans GW, Greene T, Rocco MV, Cushman WC, Reboussin DM, Feinglos MN, and Papademetriou V
- Abstract
Objective: To determine whether the effects of intensive (<120 mmHg) compared with standard (<140 mmHg) systolic blood pressure (SBP) treatment are different among those with prediabetes versus those with fasting normoglycemia at baseline in the Systolic Blood Pressure Intervention Trial (SPRINT)., Research Design and Methods: This was a post hoc analysis of SPRINT. SPRINT participants were categorized by prediabetes status, defined as baseline fasting serum glucose ≥100 mg/dL versus those with normoglycemia (fasting serum glucose <100 mg/dL). The primary outcome was a composite of myocardial infarction, acute coronary syndrome not resulting in myocardial infarction, stroke, acute decompensated heart failure, or death from cardiovascular causes. Cox regression was used to calculate hazard ratios for study outcomes with intensive compared with standard SBP treatment among those with prediabetes and normoglycemia., Results: Among 9,361 participants randomized (age 67.9 ± 9.4 years; 35.5% female), 3,898 and 5,425 had baseline prediabetes and normoglycemia, respectively. After a median follow-up of 3.26 years, the hazard ratio for the primary outcome was 0.69 (95% CI 0.53, 0.89) and 0.83 (95% CI 0.66, 1.03) among those with prediabetes and normoglycemia, respectively ( P value for interaction 0.30). For all-cause mortality, the hazard ratio with intensive SBP treatment was 0.77 (95% CI 0.55, 1.06) for prediabetes and 0.71 (95% CI 0.54, 0.94) for normoglycemia ( P value for interaction 0.74). Effects of intensive versus standard SBP treatment on prespecified renal outcomes and serious adverse events were similar for prediabetes and normoglycemia (all interaction P > 0.05)., Conclusions: In SPRINT, the beneficial effects of intensive SBP treatment were similar among those with prediabetes and fasting normoglycemia., (© 2017 by the American Diabetes Association.)
- Published
- 2017
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38. Toxic metals in ayurvedic preparations from a public health lead poisoning cluster investigation.
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Mikulski MA, Wichman MD, Simmons DL, Pham AN, Clottey V, and Fuortes LJ
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- Arsenic analysis, Iowa, Lead analysis, Lead Poisoning, Mercury analysis, Public Health, Environmental Pollutants analysis, Medicine, Ayurvedic, Metalloids analysis, Metals analysis, Plant Preparations chemistry
- Abstract
Background Herbal formulations, traditional medicine, and complementary and alternative medicine are used by the majority of the world's population. Toxicity associated with use of Ayurvedic products due to metal content is an increasingly recognized potential public health problem. Objectives Report on toxic metals content of Ayurvedic products obtained during an investigation of lead poisoning among users of Ayurvedic medicine. Methods Samples of Ayurvedic formulations were analyzed for metals and metalloids following established US. Environmental Protection Agency methods. Results Lead was found in 65% of 252 Ayurvedic medicine samples with mercury and arsenic found in 38 and 32% of samples, respectively. Almost half of samples containing mercury, 36% of samples containing lead and 39% of samples containing arsenic had concentrations of those metals per pill that exceeded, up to several thousand times, the recommended daily intake values for pharmaceutical impurities. Conclusions Lack of regulations regarding manufacturing and content or purity of Ayurvedic and other herbal formulations poses a significant global public health problem.
- Published
- 2017
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39. High prevalence of elevated blood lead levels in both rural and urban Iowa newborns: Spatial patterns and area-level covariates.
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Carrel M, Zahrieh D, Young SG, Oleson J, Ryckman KK, Wels B, Simmons DL, and Saftlas A
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- Adult, Educational Status, Female, Housing standards, Humans, Infant, Newborn, Iowa, Lead Poisoning blood, Male, Mothers, Lead blood, Lead Poisoning epidemiology, Rural Population, Urban Population
- Abstract
Lead in maternal blood can cross the placenta and result in elevated blood lead levels in newborns, potentially producing negative effects on neurocognitive function, particularly if combined with childhood lead exposure. Little research exists, however, into the burden of elevated blood lead levels in newborns, or the places and populations in which elevated lead levels are observed in newborns, particularly in rural settings. Using ~2300 dried bloods spots collected within 1-3 days of birth among Iowa newborns, linked with the area of mother's residence at the time of birth, we examine the spatial patterns of elevated (>5 μg/dL) blood lead levels and the ecological-level predictors of elevated blood lead levels. We find that one in five newborns exceed the 5 μg/dL action level set by the US Centers for Disease Control & Prevention (CDC). Bayesian spatial zero inflated regression indicates that elevated blood lead in newborns is associated with areas of increased pre-1940s housing and childbearing-age women with low educational status in both rural and urban settings. No differences in blood lead levels or the proportion of children exceeding 5 μg/dL are observed between urban and rural maternal residence, though a spatial cluster of elevated blood lead is observed in rural counties. These characteristics can guide the recommendation for testing of infants at well-baby appointments in places where risk factors are present, potentially leading to earlier initiation of case management. The findings also suggest that rural populations are at as great of risk of elevated blood lead levels as are urban populations. Analysis of newborn dried blood spots is an important tool for lead poisoning surveillance in newborns and can direct public health efforts towards specific places and populations where lead testing and case management will have the greatest impact.
- Published
- 2017
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40. Primary pituitary diffuse large B-cell lymphoma with somatotroph hyperplasia and acromegaly: case report.
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Ravindra VM, Raheja A, Corn H, Driscoll M, Welt C, Simmons DL, and Couldwell WT
- Subjects
- Acromegaly pathology, Female, Humans, Hyperplasia, Lymphoma, Large B-Cell, Diffuse complications, Middle Aged, Pituitary Neoplasms complications, Acromegaly etiology, Lymphoma, Large B-Cell, Diffuse diagnosis, Lymphoma, Large B-Cell, Diffuse surgery, Pituitary Neoplasms diagnosis, Pituitary Neoplasms surgery, Somatotrophs pathology
- Abstract
Diffuse large B-cell lymphoma (DLBCL) is the most common type of non-Hodgkin lymphoma and comprises approximately 30% of all lymphomas. Patients typically present with a nonpainful mass in the neck, groin, or abdomen associated with constitutional symptoms. In this report, however, the authors describe a rare case of a 61-year-old woman with hyperprolactinemia, hypothyroidism, and acromegaly (elevation of insulin-like growth factor-1 [IGF-1]) with elevated growth hormone-releasing hormone (GHRH) in whom an MRI demonstrated diffuse enlargement of the pituitary gland. Despite medical treatment, the patient had persistent elevation of IGF-1. She underwent a transsphenoidal biopsy, which yielded a diagnosis of DLBCL with an activated B-cell immunophenotype with somatotroph hyperplasia. After stereo-tactic radiation therapy in combination with chemotherapy, she is currently in remission from her lymphoma and has normalized IGF-1 levels without medical therapy, 8 months after her histopathological diagnosis. This is the only reported case of its kind and displays the importance of a broad differential diagnosis, multidisciplinary evaluation, and critical intraoperative decision-making when treating atypical sellar lesions.
- Published
- 2017
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41. A Randomized Controlled Trial of the Effects of Febuxostat Therapy on Adipokines and Markers of Kidney Fibrosis in Asymptomatic Hyperuricemic Patients With Diabetic Nephropathy.
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Beddhu S, Filipowicz R, Wang B, Wei G, Chen X, Roy AC, DuVall SL, Farrukh H, Habib AN, Bjordahl T, Simmons DL, Munger M, Stoddard G, Kohan DE, Greene T, and Huang Y
- Abstract
Background: In observational studies, higher uric acid levels are associated with metabolic syndrome, diabetes, and kidney disease., Objective: The objective of this study is to examine whether reduction of plasma uric acid with febuxostat, a xanthine oxido reductase inhibitor, impacts adipose tissue oxidative stress, adipokines, and markers of systemic inflammation or kidney fibrosis., Design: This was a double-blinded randomized controlled trial., Setting: Academic university setting was used., Patients: Overweight or obese adults with hyperuricemia and type 2 diabetic nephropathy were included., Measurements: Adipose tissue thiobarbituric acid reducing substances (TBARS) and adiponectin concentrations and urinary transforming growth factor-β (TGF-β) were primary endpoints. Plasma C-reactive protein, high molecular weight-adiponectin, interleukin-6, tumor necrosis factor-α, and TBARS and albuminuria were among predefined secondary endpoints., Methods: Participants were randomly assigned to febuxostat (n = 40) or matching placebo (n = 40) and followed for 24 weeks., Results: Baseline plasma uric acid levels were 426 ± 83 µmol/L; 95% completed the study. Estimated glomerular filtration rate (eGFR) declined from 54 ± 17 mL/min/1.73 m
2 at baseline to 51 ± 17 mL/min/1.73 m2 at 24 weeks ( P = .05). In separate mixed-effects models, compared with placebo, febuxostat reduced uric acid by 50% ( P < .001) but had no significant effects on subcutaneous adipose tissue TBARS (-7.4%, 95% confidence interval [CI], 57.4%-101.4%) or adiponectin (6.7%, 95% CI, 26.0%-53.8%) levels or urinary TGF-β/creatinine ratio (18.0%, 95% CI, 10.0%-54.8%) or secondary endpoints., Limitations: Relatively modest sample size and short duration of follow-up., Conclusions: In this population with progressive diabetic nephropathy, febuxostat effectively reduced plasma uric acid. However, no detectable effects were observed for the prespecified primary or secondary endpoints., Trial Registration: The study was registered in clinicaltrials.gov (NCT01350388)., Competing Interests: Declaration of Conflicting Interests: The author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: This study was supported by an investigator-initiated research (IIR) grant from Takeda Pharmaceuticals of North America.- Published
- 2016
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42. Sellar Wegener Granulomatosis Masquerading as Cabergoline-Resistant Prolactinoma.
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Eli IM, Raheja A, Corn HJ, Simmons DL, Palmer CA, and Couldwell WT
- Subjects
- Adult, Antineoplastic Agents therapeutic use, Cabergoline, Diagnosis, Differential, Drug Resistance, Neoplasm, Ergolines therapeutic use, Female, Glucocorticoids therapeutic use, Granulomatosis with Polyangiitis drug therapy, Granulomatosis with Polyangiitis pathology, Humans, Immunosuppressive Agents therapeutic use, Pituitary Neoplasms drug therapy, Pituitary Neoplasms pathology, Prolactinoma drug therapy, Prolactinoma pathology, Rituximab therapeutic use, Granulomatosis with Polyangiitis diagnostic imaging, Pituitary Neoplasms diagnostic imaging, Prolactinoma diagnostic imaging, Sella Turcica diagnostic imaging
- Abstract
Background: Pituitary manifestation of Wegener granulomatosis (WG) is extremely rare. When there is pituitary involvement, the granulomatous inflammatory lesions involving the pituitary gland may appear several months to years after the primary diagnosis., Case Description: We present a case of a 32-year-old woman who presented with galactorrhea, amenorrhea, and elevated serum prolactin levels. Imaging demonstrated a sellar lesion with characteristics of a pituitary macroadenoma. Treatment with cabergoline was initiated, but the tumor continued to grow during a 6-month period. Subsequent surgical exploration revealed a chronic inflammatory lesion; the patient subsequently was diagnosed with WG based on laboratory evaluation and further systemic manifestations. She had a favorable clinical and radiologic response with immunosuppressive doses of glucocorticoids and rituximab., Conclusions: This case appears to be the first reported of a patient with unknown WG in whom the diagnosis was established after she presented with a sellar lesion mimicking a prolactin-secreting pituitary adenoma on initial presentation requiring surgical resection. The only endocrine abnormality discovered was moderate hyperprolactinemia. Sellar lesions with only moderate elevations in serum prolactin, particularly those that are refractory to medical management with a dopamine agonist, should prompt further investigation to confirm the diagnosis. WG should be part of the differential diagnosis of inflammatory lesions in the sella, the identification of which can facilitate early diagnosis and treatment of this systemic disease for optimal outcome., (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Published
- 2016
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43. Effects of Extended-Release Niacin Added to Simvastatin/Ezetimibe on Glucose and Insulin Values in AIM-HIGH.
- Author
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Goldberg RB, Bittner VA, Dunbar RL, Fleg JL, Grunberger G, Guyton JR, Leiter LA, McBride R, Robinson JG, Simmons DL, Wysham C, Xu P, and Boden WE
- Subjects
- Aged, Delayed-Action Preparations, Diabetes Mellitus metabolism, Drug Therapy, Combination, Female, Glucose Intolerance metabolism, Humans, Hypolipidemic Agents therapeutic use, Intention to Treat Analysis, Male, Middle Aged, Blood Glucose metabolism, Diabetes Mellitus chemically induced, Ezetimibe, Simvastatin Drug Combination therapeutic use, Glucose Intolerance chemically induced, Hypolipidemic Agents adverse effects, Insulin blood, Niacin adverse effects
- Abstract
Background: Niacin is an antidyslipidemic agent that may cause blood sugar elevation in patients with diabetes, but its effects on glucose and insulin values in nondiabetic statin-treated subjects with cardiovascular disease and at high risk for diabetes are less well known., Methods: This was a prespecified, intent-to-treat analysis of the Atherothrombosis Intervention in Metabolic syndrome with low high-density lipoprotein/high triglycerides: Impact on Global Health outcomes trial which randomized 3,414 participants at 92 centers in the US and Canada to extended-release niacin (ERN) plus simvastatin/ezetimibe (ERN) or simvastatin/ezetimibe plus placebo (Placebo). Baseline and annual fasting glucose and insulin values were measured. Those experiencing an adverse event indicative of diabetes or starting medications for diabetes were considered to have confirmed diabetes. In addition, nondiabetic subjects with 2 annual follow-up glucose measurements were categorized into normal, impaired fasting glucose or newly diagnosed diabetes (presumed or confirmed) states., Results: Compared with placebo, ERN increased annual fasting glucose from baseline to 1 year in both those with normal (7.9 ± 15.8 vs 4.3 ± 10.3 mg/dL; P < .001) and impaired fasting glucose (4.1 ± 18.7 vs 1.4 ± 14.9; P < .02) and increased insulin levels. Both effects waned over the next 2 years. There were less consistent effects in those with baseline diabetes. There was an increased risk of progressing from normal to presumed or confirmed impaired fasting glucose (ERN 197/336) cases (58.6%) vs placebo 135/325 cases (41.5%; P < .001) over time, but no difference in diabetes development in the 2 treatment groups except in those with normal fasting glucose at baseline., Conclusions: The addition of ERN to simvastatin/ezetimibe had marginal effects on glycemia in those with diabetes at baseline, and there was a trend toward increased development of new-onset diabetes. In addition, ERN increased the risk of developing impaired fasting glucose, which may have deleterious consequences over time and warrants further study., (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Published
- 2016
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44. Resetting the bar: Establishing baselines for persistent contaminants after Hurricane Sandy in the coastal environments of New Jersey and New York, USA.
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Reilly TJ, Focazio MJ, and Simmons DL
- Subjects
- Disasters, New Jersey, New York, Cyclonic Storms, Environmental Monitoring, Water Pollutants, Chemical
- Published
- 2016
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45. Haptoglobin Genotype as a Determinant of Benefit or Harm From Niacin for Participants With Diabetes.
- Author
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Asleh R, Levy NS, Doros G, Costacou T, Robinson JG, Blum S, Goldenstein H, Boden WE, Simmons DL, Lacy MA, Grunberger G, Anderson TJ, and Levy AP
- Subjects
- Genotype, Humans, Lipoproteins, HDL metabolism, Diabetes Mellitus genetics, Diabetes Mellitus metabolism, Haptoglobins genetics, Hypolipidemic Agents therapeutic use, Niacin therapeutic use
- Published
- 2016
- Full Text
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46. Assessment of the Mitigative Capacity of Dietary Zinc on PCB126 Hepatotoxicity and the Contribution of Zinc to Toxicity.
- Author
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Klaren WD, Gibson-Corley KN, Wels B, Simmons DL, McCormick ML, Spitz DR, and Robertson LW
- Subjects
- Animals, Feeding Behavior, Gene Expression, Male, Metallothionein genetics, Oxidative Stress, Rats, Receptors, Aryl Hydrocarbon metabolism, Superoxide Dismutase metabolism, Zinc administration & dosage, Diet, Liver drug effects, Polychlorinated Biphenyls toxicity, Zinc pharmacology
- Abstract
Hepatic levels of the essential micronutrient, zinc, are diminished by several hepatotoxicants, and the dietary supplementation of zinc has proven protective in those cases. 3,3',4,4',5-Pentachlorobiphenyl (PCB126), a liver toxicant, alters hepatic nutrient homeostasis and lowers hepatic zinc levels. The current study was designed to determine the mitigative potential of dietary zinc in the toxicity associated with PCB126 and the role of zinc in that toxicity. Male Sprague-Dawley rats were divided into three dietary groups and fed diets deficient in zinc (7 ppm Zn), adequate in zinc (30 ppm Zn), and supplemented in zinc (300 ppm). The animals were maintained for 3 weeks on these diets, then given a single IP injection of vehicle or 1 or 5 μmol/kg PCB126. After 2 weeks, the animals were euthanized. Dietary zinc increased the level of ROS, the activity of CuZnSOD, and the expression of metallothionein but decreased the levels of hepatic manganese. PCB126 exposed rats exhibited classic signs of exposure, including hepatomegaly, increased hepatic lipids, increased ROS and CYP induction. Liver histology suggests some mild ameliorative properties of both zinc deficiency and zinc supplementation. Other metrics of toxicity (relative liver and thymus weights, hepatic lipids, and hepatic ROS) did not support this trend. Interestingly, the zinc supplemented high dose PCB126 group had mildly improved histology and less efficacious induction of investigated genes than did the low dose PCB126 group. Overall, decreases in zinc caused by PCB126 likely contribute little to the ongoing toxicity, and the mitigative/preventive capacity of zinc against PCB126 exposure seems limited.
- Published
- 2016
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47. Dietary Manganese Modulates PCB126 Toxicity, Metal Status, and MnSOD in the Rat.
- Author
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Wang B, Klaren WD, Wels BR, Simmons DL, Olivier AK, Wang K, Robertson LW, and Ludewig G
- Subjects
- Administration, Oral, Animals, Body Weight drug effects, Carbonates metabolism, Dose-Response Relationship, Drug, Gene Expression drug effects, Liver enzymology, Liver pathology, Male, Manganese metabolism, Mitochondria, Liver drug effects, Mitochondria, Liver metabolism, Mitochondria, Liver pathology, Organ Size drug effects, Rats, Sprague-Dawley, Superoxide Dismutase genetics, Carbonates pharmacology, Environmental Pollutants toxicity, Liver drug effects, Manganese pharmacology, Oxidative Stress drug effects, Polychlorinated Biphenyls toxicity, Superoxide Dismutase metabolism
- Abstract
PCB126 (3,3',4,4',5-pentachlorobiphenyl) is a potent aryl hydrocarbon receptor agonist and induces oxidative stress. Because liver manganese (Mn) levels decrease in response to PCB126, a Mn dietary study was designed to investigate the role of Mn in PCB126 toxicity. Male Sprague Dawley rats received diets containing 0, 10, or 150 ppm added Mn for 3 weeks, followed by a single ip injection of corn oil or PCB126 (5 µmol/kg body weight). After 2 weeks, Mn, Cu, Zn, and Fe levels in the heart, liver, and liver mitochondria, and Mn-containing superoxide dismutase (MnSOD) and metallothionein mRNA, MnSOD protein, and MnSOD activity were determined. Mn levels in liver, heart, and liver mitochondria were strongly decreased by the Mn-deficient diet. Small effects on Fe levels and a stepwise increase in MnSOD activity with dietary Mn were also visible. PCB126 caused profound changes in Cu (up), Zn, Fe, and Mn (down) in liver, but not in heart, and differing effects (Cu, Zn, and Fe up, Mn down) in liver mitochondria. Liver MnSOD and metallothionein mRNA levels and MnSOD protein were increased but MnSOD activity was decreased by PCB126. PCB126-induced liver enlargement was dose-dependently reduced with increasing dietary Mn. These changes in metals homeostasis and MnSOD activity in liver but not heart may be a/the mechanism of PCB126 liver-specific toxicity. Specifically, transport of Fenton metals (Cu, Fe) into and Mn out of the mitochondria, a probable mechanism for lower MnSOD activity, may be a/the cause of PCB126-induced oxidative stress. The role of metallothioneins needs further evaluation. Dietary Mn slightly alleviated PCB126-induced toxicities., (© The Author 2015. Published by Oxford University Press on behalf of the Society of Toxicology. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2016
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48. Progression of micronutrient alteration and hepatotoxicity following acute PCB126 exposure.
- Author
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Klaren WD, Gadupudi GS, Wels B, Simmons DL, Olivier AK, and Robertson LW
- Subjects
- Animals, Chemical and Drug Induced Liver Injury genetics, Chemical and Drug Induced Liver Injury metabolism, Chemical and Drug Induced Liver Injury pathology, Copper metabolism, Disease Progression, Fatty Liver chemically induced, Fatty Liver metabolism, Fatty Liver pathology, Gene Expression Regulation, Hepatomegaly chemically induced, Hepatomegaly metabolism, Hepatomegaly pathology, Homeostasis, Lipid Metabolism drug effects, Liver metabolism, Liver pathology, Male, Rats, Sprague-Dawley, Reactive Oxygen Species metabolism, Receptors, Aryl Hydrocarbon agonists, Receptors, Aryl Hydrocarbon metabolism, Risk Assessment, Selenium metabolism, Time Factors, Zinc metabolism, Chemical and Drug Induced Liver Injury etiology, Environmental Pollutants toxicity, Liver drug effects, Micronutrients metabolism, Polychlorinated Biphenyls toxicity
- Abstract
Polychlorinated Biphenyls (PCBs) are industrial chemicals that have become a persistent threat to human health due to ongoing exposure. A subset of PCBs, known as dioxin-like PCBs, pose a special threat given their potent hepatic effects. Micronutrients, especially Cu, Zn and Se, homeostatic dysfunction is commonly seen after exposure to dioxin-like PCBs. This study investigates whether micronutrient alteration is the byproduct of the ongoing hepatotoxicity, marked by lipid accumulation, or a concurrent, yet independent event of hepatic damage. A time course study was carried out using male Sprague-Dawley rats with treatments of PCB126, the prototypical dioxin-like PCB, resulting in 6 different time points. Animals were fed a purified diet, based on AIN-93G, for three weeks to ensure micronutrient equilibration. A single IP injection of either tocopherol-stripped soy oil vehicle (5 mL/kg) or 5 μmol/kg PCB126 dose in vehicle was given at various time points resulting in exposures of 9h, 18 h, 36 h, 3 days, 6 days, and 12 days. Mild hepatic vacuolar change was seen as early as 36 h with drastic changes at the later time points, 6 and 12 days. Micronutrient alterations, specifically Cu, Zn, and Se, were not seen until after day 3 and only observed in the liver. No alterations were seen in the duodenum, suggesting that absorption and excretion may not be involved. Micronutrient alterations occur with ROS formation, lipid accumulation, and hepatomegaly. To probe the mechanistic underpinnings, alteration of gene expression of several copper chaperones was investigated; only metallothionein appeared elevated. These data suggest that the disruption in micronutrient status is a result of the hepatic injury elicited by PCB126 and is mediated in part by metallothionein., (Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2015
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49. Effects of TZD Use and Discontinuation on Fracture Rates in ACCORD Bone Study.
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Schwartz AV, Chen H, Ambrosius WT, Sood A, Josse RG, Bonds DE, Schnall AM, Vittinghoff E, Bauer DC, Banerji MA, Cohen RM, Hamilton BP, Isakova T, Sellmeyer DE, Simmons DL, Shibli-Rahhal A, Williamson JD, and Margolis KL
- Subjects
- Aged, Cohort Studies, Diabetes Mellitus, Type 2 complications, Diabetes Mellitus, Type 2 drug therapy, Female, Follow-Up Studies, Humans, Hypoglycemic Agents therapeutic use, Incidence, Longitudinal Studies, Male, Middle Aged, Pioglitazone, Rosiglitazone, Thiazolidinediones therapeutic use, Fractures, Bone epidemiology, Hypoglycemic Agents adverse effects, Thiazolidinediones adverse effects
- Abstract
Context: In trials, thiazolidinediones (TZDs) increase fracture risk in women, but the effects of discontinuation are unknown., Objective: The objective was to investigate the effects of TZD use and discontinuation on fractures in women and men., Design: This was a longitudinal observational cohort study using data from the Action to Control Cardiovascular Risk in Diabetes (ACCORD) trial bone ancillary study. Duration of TZD use and discontinuation during ACCORD, assessed every 2-4 months at clinic visits, were modeled as time-varying covariates in proportional hazards models for occurrence of first non-spine fracture., Participants: We studied a total of 6865 participants in ACCORD BONE., Main Outcome Measures: Main outcome measures were centrally adjudicated non-spine fracture., Results: Average age was 62.4 (SD, 6.6) years; average duration of diabetes was 11.1 (SD, 7.8) years. Rosiglitazone was used by 74% and pioglitazone by 13% of participants. During a mean follow-up of 4.8 (SD, 1.5) years, 262 men and 287 women experienced at least one non-spine fracture. The fracture rate was higher in women with 1-2 years of TZD use (hazard ratio [HR] = 2.32; 95% confidence interval [CI], 1.49, 3.62) or >2 years of TZD use (HR = 2.01; 95% CI, 1.35, 2.98), compared with no use. The fracture rate was reduced in women who had discontinued TZD use for 1-2 years (HR = 0.57; 95% CI, 0.35, 0.92) or > 2 years (HR = 0.42; 95% CI, 0.24, 0.74) compared with current users. TZD use and discontinuation were not associated with non-spine fractures in men., Conclusions: TZD use was associated with increased non-spine fractures in women, but not men, with type 2 diabetes. When women discontinued TZD use, the fracture effects were attenuated.
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- 2015
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50. Uncontrolled combustion of shredded tires in a landfill - Part 1: Characterization of gaseous and particulate emissions.
- Author
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Downard J, Singh A, Bullard R, Jayarathne T, Rathnayake C, Simmons DL, Wels BR, Spak SN, Peters T, Beardsley D, Stanier C, and Stone EA
- Abstract
In summer 2012, a landfill liner comprising an estimated 1.3 million shredded tires burned in Iowa City, Iowa. During the fire, continuous monitoring and laboratory measurements were used to characterize the gaseous and particulate emissions and to provide new insights into the qualitative nature of the smoke and the quantity of pollutants emitted. Significant enrichments in ambient concentrations of CO, CO
2 , SO2 , particle number (PN), fine particulate (PM2.5 ) mass, elemental carbon (EC), and polycyclic aromatic hydrocarbons (PAH) were observed. For the first time, PM2.5 from tire combustion was shown to contain PAH with nitrogen heteroatoms (a.k.a. azaarenes) and picene, a compound previously suggested to be unique to coal-burning. Despite prior laboratory studies' findings, metals used in manufacturing tires (i.e. Zn, Pb, Fe) were not detected in coarse particulate matter (PM10 ) at a distance of 4.2 km downwind. Ambient measurements were used to derive the first in situ fuel-based emission factors (EF) for the uncontrolled open burning of tires, revealing substantial emissions of SO2 (7.1 g kg-1 ), particle number (3.5×1016 kg-1 ), PM2.5 (5.3 g kg-1 ), EC (2.37 g kg-1 ), and 19 individual PAH (totaling 56 mg kg-1 ). A large degree of variability was observed in day-to-day EF, reflecting a range of flaming and smoldering conditions of the large-scale fire, for which the modified combustion efficiency ranged from 0.85-0.98. Recommendations for future research on this under-characterized source are also provided.- Published
- 2015
- Full Text
- View/download PDF
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