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1.
Palliat Support Care ; : 1-9, 2023 Sep 22.
Artigo em Inglês | MEDLINE | ID: mdl-37734916

RESUMO

OBJECTIVES: Neuroticism is a significant predictor of adverse psychological outcomes in patients with cancer. Less is known about how this relationship manifests in those with noncancer illness at the end-of-life (EOL). The objective of this study was to examine the impact of neuroticism as a moderator of physical symptoms and development of depression in patients with amyotrophic lateral sclerosis (ALS), chronic obstructive pulmonary disease (COPD), end-stage renal disease (ESRD), and frailty in the last 6 months of life. METHODS: We met this objective using secondary data collected in the Dignity and Distress across End-of-Life Populations study. The data included N = 404 patients with ALS (N = 101), COPD (N = 100), ESRD (N = 101), and frailty (N = 102) in the estimated last 6 months of life, with a range of illness-related symptoms, assessed longitudinally at 2 time points. We examined neuroticism as a moderator of illness-related symptoms at Time 1 (∼6 months before death) and depression at Time 2 (∼3 months before death) using ordinary least squares regression. RESULTS: Results revealed that neuroticism significantly moderated the relationship between the following symptoms and depression measured 3 months later: drowsiness, fatigue, shortness of breath, wellbeing (ALS); drowsiness, trouble sleeping, will to live, activity (COPD); constipation (ESRD); and weakness and will to live (frailty). SIGNIFICANCE OF RESULTS: These findings suggest that neuroticism represents a vulnerability factor that either attenuates or amplifies the relationship of specific illness and depressive symptoms in these noncancer illness groups at the EOL. Identifying those high in neuroticism may provide insight into patient populations that require special care at the EOL.

3.
Injury ; 52(8): 2154-2159, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33773802

RESUMO

BACKGROUND: Written material remains one of the most common methods of education, however the current generation of learners may benefit from additional different media. In our study, we aim to quantify the effects of an innovative video instruction on subsequent resident performance in a burn patient simulation. METHODS: Following IRB approval, 60 Plastic Surgery residents were randomly assigned to two groups. The control group ("non-video" group) (n = 30) was given only written material as preparation. The experimental group ("video" group) (n = 30) was provided access to video training materials in addition to the written material on technical and non-technical skills. Their videotaped performances on simulation were evaluated by a blinded surgical faculty member. The comparison of variables between the two groups was performed using a Mann-Whitney test for non-normal distributions of quantitative variables, and Fisher's Exact Probability test for qualitative data. Statistical significance was set at p < 0.05. RESULTS: Compared to the non-video group, the video group achieved significantly higher scores in the technical skills of assessment of breathing (p = 0.015), disability (p = 0.023), and exposure (p = 0.005) and in the non-technical skills of decision-making (p = 0.035). CONCLUSIONS: In residents participating in burn patient simulations, video training in advance of the simulation significantly improved their assessments of breathing, disability, and exposure as well as decision-making. Our video is a valuable tool to enhance trainees' technical and non-technical competencies in managing burn patient simulations.


Assuntos
Queimaduras , Internato e Residência , Treinamento por Simulação , Queimaduras/terapia , Competência Clínica , Estudos de Coortes , Humanos
4.
J Lipid Res ; 61(3): 387-402, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-31964763

RESUMO

Obesity, dyslipidemia, and insulin resistance, the increasingly common metabolic syndrome, are risk factors for CVD and type 2 diabetes that warrant novel therapeutic interventions. The flavonoid nobiletin displays potent lipid-lowering and insulin-sensitizing properties in mice with metabolic dysfunction. However, the mechanisms by which nobiletin mediates metabolic protection are not clearly established. The central role of AMP-activated protein kinase (AMPK) as an energy sensor suggests that AMPK is a target of nobiletin. We tested the hypothesis that metabolic protection by nobiletin required phosphorylation of AMPK and acetyl-CoA carboxylase (ACC) in mouse hepatocytes, in mice deficient in hepatic AMPK (Ampkß1-/-), in mice incapable of inhibitory phosphorylation of ACC (AccDKI), and in mice with adipocyte-specific AMPK deficiency (iß1ß2AKO). We fed mice a high-fat/high-cholesterol diet with or without nobiletin. Nobiletin increased phosphorylation of AMPK and ACC in primary mouse hepatocytes, which was associated with increased FA oxidation and attenuated FA synthesis. Despite loss of ACC phosphorylation in Ampkß1-/- hepatocytes, nobiletin suppressed FA synthesis and enhanced FA oxidation. Acute injection of nobiletin into mice did not increase phosphorylation of either AMPK or ACC in liver. In mice fed a high-fat diet, nobiletin robustly prevented obesity, hepatic steatosis, dyslipidemia, and insulin resistance, and it improved energy expenditure in Ampkß1-/-, AccDKI, and iß1ß2AKO mice to the same extent as in WT controls. Thus, the beneficial metabolic effects of nobiletin in vivo are conferred independently of hepatic or adipocyte AMPK activation. These studies further underscore the therapeutic potential of nobiletin and begin to clarify possible mechanisms.


Assuntos
Proteínas Quinases Ativadas por AMP/antagonistas & inibidores , Antioxidantes/farmacologia , Citrus/química , Flavonas/farmacologia , Substâncias Protetoras/farmacologia , Proteínas Quinases Ativadas por AMP/deficiência , Proteínas Quinases Ativadas por AMP/metabolismo , Animais , Antioxidantes/química , Dieta Hiperlipídica/efeitos adversos , Flavonas/química , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Substâncias Protetoras/química
5.
Curr Opin Lipidol ; 30(1): 1-9, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30586346

RESUMO

PURPOSE OF REVIEW: Bempedoic acid has emerged as a potent inhibitor of ATP-citrate lyase (ACLY), a target for the reduction of LDL cholesterol (LDL-C). We review the impact of bempedoic acid treatment on lipoprotein metabolism and atherosclerosis in preclinical models and patients with hypercholesterolemia. RECENT FINDINGS: The liver-specific activation of bempedoic acid inhibits ACLY, a key enzyme linking glucose catabolism to lipogenesis by catalyzing the formation of acetyl-CoA from mitochondrial-derived citrate for de novo synthesis of fatty acids and cholesterol. Adenosine monophosphate-activated protein kinase activation by bempedoic acid is not required for its lipid-regulating effects in vivo. Mendelian randomization of large human study cohorts has validated ACLY inhibition as a target for LDL-C lowering and atheroprotection. In rodents, bempedoic acid decreases plasma cholesterol and triglycerides, and prevents hepatic steatosis. In apolipoprotein E-deficient (Apoe) mice, LDL receptor-deficient (Ldlr) mice and LDLR-deficient miniature pigs, bempedoic acid reduces LDL-C and attenuates atherosclerosis. LDLR expression and activity are increased in primary human hepatocytes and in Apoe mouse liver treated with bempedoic acid suggesting a mechanism for LDL-C lowering, although additional pathways are likely involved. Phase 2 and 3 clinical trials revealed that bempedoic acid effectively lowers LDL-C as monotherapy, combined with ezetimibe, added to statin therapy and in statin-intolerant hypercholesterolemic patients. Treatment does not affect plasma concentrations of triglyceride or other lipoproteins. SUMMARY: The LDL-C-lowering and attenuated atherosclerosis in animal models and reduced LDL-C in hypercholesterolemic patients has validated ACLY inhibition as a therapeutic strategy. Positive results from phase 3 long-term cardiovascular outcome trials in high-risk patients are required for bempedoic acid to be approved for prevention of atherosclerosis.


Assuntos
Aterosclerose/tratamento farmacológico , Aterosclerose/metabolismo , Ácidos Dicarboxílicos/farmacologia , Ácidos Graxos/farmacologia , Lipoproteínas/metabolismo , ATP Citrato (pro-S)-Liase/antagonistas & inibidores , Animais , Ácidos Dicarboxílicos/uso terapêutico , Ácidos Graxos/uso terapêutico , Humanos , Terapia de Alvo Molecular , Triglicerídeos/metabolismo
6.
Eur J Vasc Endovasc Surg ; 57(2): 221-228, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30293889

RESUMO

OBJECTIVE: Recently, the prevalence of abdominal aortic aneurysm (AAA) using screening strategies based on elevated cardiovascular disease (CVD) risk was reported. AAA was defined as a diameter ≥30 mm, with prevalence of 6.1% and 1.8% in men and women respectively, consistent with the widely reported AAA predominant prevalence in males. Given the obvious differences in body size between sexes this study aimed to re-evaluate the expanded CVD risk based AAA screening dataset to determine the effect of body size on sex specific AAA prevalence. METHODS: Absolute (26 and 30 mm) and relative (aortic size index [ASI] equals the maximum infrarenal aorta diameter (cm) divided by body surface area (m2), ASI ≥ 1.5) thresholds were used to assess targeted AAA screening groups (n = 4115) and compared with a self reported healthy elderly control group (n = 800). RESULTS: Male AAA prevalence was the same using either the 30 mm or ASI ≥1.5 aneurysm definitions (5.7%). In females, AAA prevalence was significantly different between the 30 mm (2.4%) and ASI ≥ 1.5 (4.5%) or the 26 mm (4.4%) thresholds. CONCLUSION: The results suggest the purported male predominance in AAA prevalence is primarily an artefact of body size differences. When aortic size is adjusted for body surface area there is only a modest sex difference in AAA prevalence. This observation has potential implications in the context of the ongoing discussion regarding AAA screening in women.


Assuntos
Aneurisma da Aorta Abdominal/epidemiologia , Superfície Corporal , Programas de Rastreamento , Distribuição por Idade , Fatores de Confusão Epidemiológicos , Feminino , Humanos , Nova Zelândia/epidemiologia , Prevalência , Medição de Risco/métodos , Distribuição por Sexo
7.
J Lipid Res ; 59(9): 1714-1728, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30008441

RESUMO

Obesity and its associated metabolic dysfunction and cardiovascular disease risk represent a leading cause of adult morbidity worldwide. Currently available pharmacological therapies for obesity have had limited success in reversing existing obesity and metabolic dysregulation. Previous prevention studies demonstrated that the citrus flavonoids, naringenin and nobiletin, protect against obesity and metabolic dysfunction in Ldlr-/- mice fed a high-fat cholesterol-containing (HFHC) diet. However, their effects in an intervention model are unknown. In this report, we show that, in Ldlr-/- mice with diet-induced obesity, citrus flavonoid supplementation to a HFHC diet reversed existing obesity and adipocyte size and number through enhanced energy expenditure and increased hepatic fatty acid oxidation. Caloric intake was unaffected and no evidence of white adipose tissue browning was observed. Reversal of adiposity was accompanied by improvements in hyperlipidemia, insulin sensitivity, hepatic steatosis, and a modest reduction in blood monocytes. Together, this resulted in atherosclerotic lesions that were unchanged in size, but characterized by reduced macrophage content, consistent with a more stable plaque phenotype. These studies further suggest potential therapeutic utility of citrus flavonoids, especially in the context of existing obesity, metabolic dysfunction, and cardiovascular disease.


Assuntos
Aterosclerose/complicações , Citrus/química , Flavonoides/farmacologia , Síndrome Metabólica/complicações , Obesidade/complicações , Obesidade/tratamento farmacológico , Receptores de LDL/deficiência , Tecido Adiposo/efeitos dos fármacos , Tecido Adiposo/patologia , Animais , Peso Corporal/efeitos dos fármacos , Colesterol/metabolismo , Dieta Hiperlipídica/efeitos adversos , Metabolismo Energético/efeitos dos fármacos , Flavonoides/uso terapêutico , Hiperlipidemias/complicações , Resistência à Insulina , Macrófagos/efeitos dos fármacos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Monócitos/efeitos dos fármacos , Obesidade/metabolismo , Obesidade/patologia
8.
Arterioscler Thromb Vasc Biol ; 38(5): 1178-1190, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29449335

RESUMO

OBJECTIVE: Bempedoic acid (BemA; ETC-1002) is a novel drug that targets hepatic ATP-citrate lyase to reduce cholesterol biosynthesis. In phase 2 studies, BemA lowers elevated low-density lipoprotein cholesterol (LDL-C) in hypercholesterolemic patients. In the present study, we tested the ability of BemA to decrease plasma cholesterol and LDL-C and attenuate atherosclerosis in a large animal model of familial hypercholesterolemia. APPROACH AND RESULTS: Gene targeting has been used to generate Yucatan miniature pigs heterozygous (LDLR+/-) or homozygous (LDLR-/-) for LDL receptor deficiency (ExeGen). LDLR+/- and LDLR-/- pigs were fed a high-fat, cholesterol-containing diet (34% kcal fat; 0.2% cholesterol) and orally administered placebo or BemA for 160 days. In LDLR+/- pigs, compared with placebo, BemA decreased plasma cholesterol and LDL-C up to 40% and 61%, respectively. In LDLR-/- pigs, in which plasma cholesterol and LDL-C were 5-fold higher than in LDLR+/- pigs, BemA decreased plasma cholesterol and LDL-C up to 27% and 29%, respectively. Plasma levels of triglycerides and high-density lipoprotein cholesterol, fasting glucose and insulin, and liver lipids were unaffected by treatment in either genotype. In the aorta of LDLR+/- pigs, BemA robustly attenuated en face raised lesion area (-58%) and left anterior descending coronary artery cross-sectional lesion area (-40%). In LDLR-/- pigs, in which lesions were substantially more advanced, BemA decreased aortic lesion area (-47%) and left anterior descending coronary artery lesion area (-48%). CONCLUSIONS: In a large animal model of LDLR deficiency and atherosclerosis, long-term treatment with BemA reduces LDL-C and attenuates the development of aortic and coronary atherosclerosis in both LDLR+/- and LDLR-/- miniature pigs.


Assuntos
Anticolesterolemiantes/farmacologia , Doenças da Aorta/prevenção & controle , Aterosclerose/prevenção & controle , LDL-Colesterol/sangue , Doença da Artéria Coronariana/prevenção & controle , Ácidos Dicarboxílicos/farmacologia , Ácidos Graxos/farmacologia , Hiperlipoproteinemia Tipo II/tratamento farmacológico , Receptores de LDL/deficiência , Animais , Animais Geneticamente Modificados , Anticolesterolemiantes/farmacocinética , Doenças da Aorta/sangue , Doenças da Aorta/genética , Doenças da Aorta/patologia , Aterosclerose/sangue , Aterosclerose/genética , Aterosclerose/patologia , Biomarcadores/sangue , Doença da Artéria Coronariana/sangue , Doença da Artéria Coronariana/genética , Doença da Artéria Coronariana/patologia , Ácidos Dicarboxílicos/farmacocinética , Modelos Animais de Doenças , Regulação para Baixo , Ácidos Graxos/farmacocinética , Feminino , Regulação da Expressão Gênica , Predisposição Genética para Doença , Hiperlipoproteinemia Tipo II/sangue , Hiperlipoproteinemia Tipo II/genética , Masculino , Fenótipo , Placa Aterosclerótica , Receptores de LDL/genética , Suínos , Porco Miniatura
10.
Arterioscler Thromb Vasc Biol ; 37(4): 647-656, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-28153881

RESUMO

OBJECTIVE: Bempedoic acid (ETC-1002, 8-hydroxy-2,2,14,14-tetramethylpentadecanedioic acid) is a novel low-density lipoprotein cholesterol-lowering compound. In animals, bempedoic acid targets the liver where it inhibits cholesterol and fatty acid synthesis through inhibition of ATP-citrate lyase and through activation of AMP-activated protein kinase. In this study, we tested the hypothesis that bempedoic acid would prevent diet-induced metabolic dysregulation, inflammation, and atherosclerosis. APPROACH AND RESULTS: Ldlr-/- mice were fed a high-fat, high-cholesterol diet (42% kcal fat, 0.2% cholesterol) supplemented with bempedoic acid at 0, 3, 10 and 30 mg/kg body weight/day. Treatment for 12 weeks dose-dependently attenuated diet-induced hypercholesterolemia, hypertriglyceridemia, hyperglycemia, hyperinsulinemia, fatty liver and obesity. Compared to high-fat, high-cholesterol alone, the addition of bempedoic acid decreased plasma triglyceride (up to 64%) and cholesterol (up to 50%) concentrations, and improved glucose tolerance. Adiposity was significantly reduced with treatment. In liver, bempedoic acid prevented cholesterol and triglyceride accumulation, which was associated with increased fatty acid oxidation and reduced fatty acid synthesis. Hepatic gene expression analysis revealed that treatment significantly increased expression of genes involved in fatty acid oxidation while suppressing inflammatory gene expression. In full-length aorta, bempedoic acid markedly suppressed cholesteryl ester accumulation, attenuated the expression of proinflammatory M1 genes and attenuated the iNos/Arg1 ratio. Treatment robustly attenuated atherosclerotic lesion development in the aortic sinus by 44%, with beneficial changes in morphology, characteristic of earlier-stage lesions. CONCLUSIONS: Bempedoic acid effectively prevents plasma and tissue lipid elevations and attenuates the onset of inflammation, leading to the prevention of atherosclerotic lesion development in a mouse model of metabolic dysregulation.


Assuntos
ATP Citrato (pro-S)-Liase/antagonistas & inibidores , Aterosclerose/prevenção & controle , Ácidos Dicarboxílicos/farmacologia , Dieta Hiperlipídica , Dislipidemias/prevenção & controle , Inibidores Enzimáticos/farmacologia , Ácidos Graxos/farmacologia , Inflamação/prevenção & controle , Fígado/efeitos dos fármacos , Obesidade/prevenção & controle , Receptores de LDL/deficiência , ATP Citrato (pro-S)-Liase/metabolismo , Animais , Aterosclerose/sangue , Aterosclerose/enzimologia , Aterosclerose/genética , Biomarcadores/sangue , Glicemia/efeitos dos fármacos , Glicemia/metabolismo , Modelos Animais de Doenças , Dislipidemias/sangue , Dislipidemias/enzimologia , Dislipidemias/genética , Regulação da Expressão Gênica , Predisposição Genética para Doença , Inflamação/sangue , Inflamação/enzimologia , Inflamação/genética , Mediadores da Inflamação/sangue , Insulina/sangue , Lipídeos/sangue , Fígado/enzimologia , Masculino , Camundongos Knockout , Obesidade/sangue , Obesidade/enzimologia , Obesidade/genética , Fenótipo , Receptores de LDL/genética , Fatores de Tempo
11.
Curr Opin Lipidol ; 28(2): 193-200, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28059952

RESUMO

PURPOSE OF REVIEW: ATP-citrate lyase (ACLY) has re-emerged as a drug target for LDL cholesterol (LDL-C) lowering. We review ACLY as a therapeutic strategy, its genetics, its molecular and cellular biology, and also its inhibition. RECENT FINDINGS: ACLY is a critical enzyme linking glucose catabolism to lipogenesis by providing acetyl-CoA from mitochondrial citrate for fatty acid and cholesterol biosynthesis. Human genetic variants have been associated with enhanced growth and survival of several cancers, and with attenuated plasma triglyceride responses to dietary fish oil. In mice, liver-specific Acly deficiency protects from hepatic steatosis and dyslipidemia, whereas adipose tissue-specific Acly deletion has no phenotype, supporting therapeutic inhibition of ACLY. A lipid-regulating compound, bempedoic acid, was discovered to potently inhibit ACLY, and in animal models, it prevents dyslipidemia and attenuates atherosclerosis. Phase 2 clinical trials revealed that bempedoic acid effectively lowers LDL-C as monotherapy, combined with ezetimibe, added to statin therapy and in statin-intolerant hypercholesterolemic patients. SUMMARY: The efficacy of bempedoic acid as an LDL-C-lowering agent has validated ACLY inhibition as a therapeutic strategy. Positive results of phase 3 patient studies, together with long-term cardiovascular disease outcome trials, are required to establish ACLY as a major new target in cardiovascular medicine.


Assuntos
ATP Citrato (pro-S)-Liase/genética , ATP Citrato (pro-S)-Liase/metabolismo , Dislipidemias/tratamento farmacológico , Dislipidemias/enzimologia , Terapia de Alvo Molecular/métodos , ATP Citrato (pro-S)-Liase/antagonistas & inibidores , Animais , Ácidos Dicarboxílicos/metabolismo , Dislipidemias/genética , Dislipidemias/patologia , Inibidores Enzimáticos/farmacologia , Ácidos Graxos/metabolismo , Humanos
12.
Arterioscler Thromb Vasc Biol ; 36(12): 2439-2445, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27765764

RESUMO

OBJECTIVE: Next-generation sequencing technology is transforming our understanding of heterozygous familial hypercholesterolemia, including revision of prevalence estimates and attribution of polygenic effects. Here, we examined the contributions of monogenic and polygenic factors in patients with severe hypercholesterolemia referred to a specialty clinic. APPROACH AND RESULTS: We applied targeted next-generation sequencing with custom annotation, coupled with evaluation of large-scale copy number variation and polygenic scores for raised low-density lipoprotein cholesterol in a cohort of 313 individuals with severe hypercholesterolemia, defined as low-density lipoprotein cholesterol >5.0 mmol/L (>194 mg/dL). We found that (1) monogenic familial hypercholesterolemia-causing mutations detected by targeted next-generation sequencing were present in 47.3% of individuals; (2) the percentage of individuals with monogenic mutations increased to 53.7% when copy number variations were included; (3) the percentage further increased to 67.1% when individuals with extreme polygenic scores were included; and (4) the percentage of individuals with an identified genetic component increased from 57.0% to 92.0% as low-density lipoprotein cholesterol level increased from 5.0 to >8.0 mmol/L (194 to >310 mg/dL). CONCLUSIONS: In a clinically ascertained sample with severe hypercholesterolemia, we found that most patients had a discrete genetic basis detected using a comprehensive screening approach that includes targeted next-generation sequencing, an assay for copy number variations, and polygenic trait scores.


Assuntos
Hiperlipoproteinemia Tipo II/genética , Herança Multifatorial , Mutação , Adulto , Idoso , Biomarcadores/sangue , LDL-Colesterol/sangue , Variações do Número de Cópias de DNA , Análise Mutacional de DNA , Feminino , Dosagem de Genes , Marcadores Genéticos , Predisposição Genética para Doença , Testes Genéticos/métodos , Hereditariedade , Heterozigoto , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Hiperlipoproteinemia Tipo II/sangue , Hiperlipoproteinemia Tipo II/diagnóstico , Masculino , Pessoa de Meia-Idade , Ontário , Fenótipo , Valor Preditivo dos Testes , Fatores de Risco , Índice de Gravidade de Doença
13.
Annu Rev Nutr ; 36: 275-99, 2016 07 17.
Artigo em Inglês | MEDLINE | ID: mdl-27146015

RESUMO

Citrus flavonoids are polyphenolic compounds with significant biological properties. This review summarizes recent advances in understanding the ability of citrus flavonoids to modulate lipid metabolism, other metabolic parameters related to the metabolic syndrome, and atherosclerosis. Citrus flavonoids, including naringenin, hesperitin, nobiletin, and tangeretin, have emerged as potential therapeutics for the treatment of metabolic dysregulation. Epidemiological studies reveal an association between the intake of citrus flavonoid-containing foods and a decreased incidence of cardiovascular disease. Studies in cell culture and animal models, as well as a limited number of clinical studies, reveal the lipid-lowering, insulin-sensitizing, antihypertensive, and anti-inflammatory properties of citrus flavonoids. In animal models, supplementation of rodent diets with citrus flavonoids prevents hepatic steatosis, dyslipidemia, and insulin resistance primarily through inhibition of hepatic fatty acid synthesis and increased fatty acid oxidation. Citrus flavonoids blunt the inflammatory response in metabolically important tissues including liver, adipose, kidney, and the aorta. The mechanisms underlying flavonoid-induced metabolic regulation have not been completely established, although several potential targets have been identified. In mouse models, citrus flavonoids show marked suppression of atherogenesis through improved metabolic parameters as well as through direct impact on the vessel wall. Recent studies support a role for citrus flavonoids in the treatment of dyslipidemia, insulin resistance, hepatic steatosis, obesity, and atherosclerosis. Larger human studies examining dose, bioavailability, efficacy, and safety are required to promote the development of these promising therapeutic agents.


Assuntos
Aterosclerose/prevenção & controle , Citrus/química , Suplementos Nutricionais , Flavonoides/uso terapêutico , Hiperlipidemias/dietoterapia , Hipolipemiantes/uso terapêutico , Lipoproteínas/metabolismo , Animais , Anti-Inflamatórios não Esteroides/uso terapêutico , Fármacos Antiobesidade/uso terapêutico , Antioxidantes/uso terapêutico , Aterosclerose/epidemiologia , Aterosclerose/etiologia , Diabetes Mellitus Tipo 2/dietoterapia , Diabetes Mellitus Tipo 2/imunologia , Diabetes Mellitus Tipo 2/metabolismo , Diabetes Mellitus Tipo 2/fisiopatologia , Humanos , Hiperlipidemias/imunologia , Hiperlipidemias/metabolismo , Hiperlipidemias/fisiopatologia , Resistência à Insulina , Lipoproteínas/sangue , Hepatopatia Gordurosa não Alcoólica/dietoterapia , Hepatopatia Gordurosa não Alcoólica/imunologia , Hepatopatia Gordurosa não Alcoólica/metabolismo , Hepatopatia Gordurosa não Alcoólica/fisiopatologia , Sobrepeso/dietoterapia , Sobrepeso/imunologia , Sobrepeso/metabolismo , Sobrepeso/fisiopatologia , Fatores de Risco
14.
Arterioscler Thromb Vasc Biol ; 35(1): 213-21, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25395619

RESUMO

OBJECTIVE: Estrogen deficiency is linked with increased low-density lipoprotein (LDL) cholesterol. The hormone receptor mediating this effect is unknown. G-protein estrogen receptor (GPER) is a recently recognized G-protein-coupled receptor that is activated by estrogens. We recently identified a common hypofunctional missense variant of GPER, namely P16L. However, the role of GPER in LDL metabolism is unknown. Therefore, we examined the association of the P16L genotype with plasma LDL cholesterol level. Furthermore, we studied the role of GPER in regulating expression of the LDL receptor and proprotein convertase subtilisin kexin type 9. APPROACH AND RESULTS: Our discovery cohort was a genetically isolated population of Northern European descent, and our validation cohort consisted of normal, healthy women aged 18 to 56 years from London, Ontario. In addition, we examined the effect of GPER on the regulation of proprotein convertase subtilisin kexin type 9 and LDL receptor expression by the treatment with the GPER agonist, G1. In the discovery cohort, GPER P16L genotype was associated with a significant increase in LDL cholesterol (mean±SEM): 3.18±0.05, 3.25±0.08, and 4.25±0.33 mmol/L, respectively, in subjects with CC (homozygous for P16), CT (heterozygotes), and TT (homozygous for L16) genotypes (P<0.05). In the validation cohort (n=339), the GPER P16L genotype was associated with a similar increase in LDL cholesterol: 2.17±0.05, 2.34±0.06, and 2.42±0.16 mmol/L, respectively, in subjects with CC, CT, and TT genotypes (P<0.05). In the human hepatic carcinoma cell line, the GPER agonist, G1, mediated a concentration-dependent increase in LDL receptor expression, blocked by either pretreatment with the GPER antagonist G15 or by shRNA-mediated GPER downregulation. G1 also mediated a GPER- and concentration-dependent decrease in proprotein convertase subtilisin kexin type 9 expression. CONCLUSIONS: GPER activation upregulates LDL receptor expression, probably at least, in part, via proprotein convertase subtilisin kexin type 9 downregulation. Furthermore, humans carrying the hypofunctional P16L genetic variant of GPER have increased plasma LDL cholesterol. In aggregate, these data suggest an important role of GPER in the regulation of LDL receptor expression and consequently LDL metabolism.


Assuntos
LDL-Colesterol/sangue , Mutação de Sentido Incorreto , Receptores de Estrogênio/genética , Receptores de Estrogênio/metabolismo , Receptores Acoplados a Proteínas G/genética , Receptores Acoplados a Proteínas G/metabolismo , Adolescente , Adulto , Idoso , Canadá , Relação Dose-Resposta a Droga , Feminino , Regulação da Expressão Gênica , Frequência do Gene , Genética Populacional , Células Hep G2 , Heterozigoto , Homozigoto , Humanos , Masculino , Pessoa de Meia-Idade , Fenótipo , Pró-Proteína Convertase 9 , Pró-Proteína Convertases/genética , Pró-Proteína Convertases/metabolismo , Interferência de RNA , Receptores de Estrogênio/efeitos dos fármacos , Receptores Acoplados a Proteínas G/efeitos dos fármacos , Receptores de LDL/genética , Receptores de LDL/metabolismo , Serina Endopeptidases/genética , Serina Endopeptidases/metabolismo , Transfecção , População Branca/genética , Adulto Jovem
16.
Can J Psychiatry ; 59(7): 393-8, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25007423

RESUMO

OBJECTIVE: To compare major depressive disorder (MDD) symptomatology within men and women in a large, representative sample of Canadian military personnel and civilians. METHOD: We used the Canadian Community Health Survey: Mental Health and Well-Being (Cycle 1.2 and Canadian Forces Supplement) (n = 36 984 and n = 8441, respectively) to compare past-year MDD symptomatology among military and civilian women, and military and civilian men. Logistic regression models were used to determine differences in the types of depressive symptoms endorsed in each group. RESULTS: Men in the military with MDD were at lower odds than men in the general population to endorse numerous symptoms of depression, such as hopelessness (adjusted odds ratio [AOR] 0.44; 99% CI 0.23 to 0.83) and inability to cope (AOR 0.53; 99% CI 0.31 to 0.92). Military women with MDD were at lower odds of thinking about their death (AOR 0.52; 99% CI 0.32 to 0.86), relative to women with MDD in the general population. CONCLUSION: Different MDD symptomatology among males and females in the military, compared with those in the general population, may reflect selection effects (for example, personality characteristics and patterns of comorbidity) or occupational experiences unique to military personnel. Future research examining the mechanisms behind MDD symptomatology in military personnel and civilians is required.


Assuntos
Transtorno Depressivo Maior/diagnóstico , Transtorno Depressivo Maior/epidemiologia , Militares/psicologia , Militares/estatística & dados numéricos , Adaptação Psicológica , Adolescente , Adulto , Atitude Frente a Morte , Canadá , Estudos Transversais , Transtorno Depressivo Maior/psicologia , Feminino , Inquéritos Epidemiológicos , Esperança , Humanos , Masculino , Programas de Rastreamento , Razão de Chances , Fatores Sexuais , Inquéritos e Questionários , Adulto Jovem
17.
J Lipid Res ; 55(7): 1254-66, 2014 07.
Artigo em Inglês | MEDLINE | ID: mdl-24864274

RESUMO

PPARδ regulates systemic lipid homeostasis and inflammation, but its role in hepatic lipid metabolism remains unclear. Here, we examine whether intervening with a selective PPARδ agonist corrects hepatic steatosis induced by a high-fat, cholesterol-containing (HFHC) diet. Ldlr(-/-) mice were fed a chow or HFHC diet (42% fat, 0.2% cholesterol) for 4 weeks. For an additional 8 weeks, the HFHC group was fed HFHC or HFHC plus GW1516 (3 mg/kg/day). GW1516-intervention significantly attenuated liver TG accumulation by induction of FA ß-oxidation and attenuation of FA synthesis. In primary mouse hepatocytes, GW1516 treatment stimulated AMP-activated protein kinase (AMPK) and acetyl-CoA carboxylase (ACC) phosphorylation in WT hepatocytes, but not AMPKß1(-/-) hepatocytes. However, FA oxidation was only partially reduced in AMPKß1(-/-) hepatocytes, suggesting an AMPK-independent contribution to the GW1516 effect. Similarly, PPARδ-mediated attenuation of FA synthesis was partially due to AMPK activation, as GW1516 reduced lipogenesis in WT hepatocytes but not AMPKß1(-/-) hepatocytes. HFHC-fed animals were hyperinsulinemic and exhibited selective hepatic insulin resistance, which contributed to elevated fasting FA synthesis and hyperglycemia. GW1516 intervention normalized fasting hyperinsulinemia and selective hepatic insulin resistance and attenuated fasting FA synthesis and hyperglycemia. The HFHC diet polarized the liver toward a proinflammatory M1 state, which was reversed by GW1516 intervention. Thus, PPARδ agonist treatment inhibits the progression of preestablished hepatic steatosis.


Assuntos
Gorduras na Dieta/efeitos adversos , Ácidos Graxos/biossíntese , Fígado Gorduroso/metabolismo , Resistência à Insulina , Lipogênese/efeitos dos fármacos , PPAR delta/metabolismo , Receptores de LDL/metabolismo , Animais , Gorduras na Dieta/farmacologia , Ácidos Graxos/genética , Fígado Gorduroso/induzido quimicamente , Fígado Gorduroso/genética , Fígado Gorduroso/patologia , Lipogênese/genética , Camundongos , Camundongos Knockout , Oxirredução/efeitos dos fármacos , PPAR delta/genética , Receptores de LDL/genética
18.
J Trauma Acute Care Surg ; 76(1): 180-4, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24368376

RESUMO

BACKGROUND: Nonfatal injuries are a leading cause of morbidity and mortality. In 2008, 14,065 patients with major trauma were hospitalized across Canada. With individuals surviving trauma, the psychosocial sequelae of severe physical injury have become an important area of research. No previous studies have used a population-based sample to estimate the incidence of suicidality (suicide or suicide attempt) following physical injury. This study aimed to assess the odds ratio (OR) of suicidality among adults with major trauma compared with a matched cohort. METHODS: This retrospective study included persons older than 18 years who experienced an unintentional major traumatic injury (Injury Severity Score [ISS] > 12) at a regional academic trauma center between April 1, 2001, and March 31, 2011. Individuals who had no suicide attempts in the previous 5 years were identified from the trauma registry. These individuals were matched with data from provincial administrative databases. A cohort matched in terms of age, sex, and date of indexed injury was created from the general population with five controls for each trauma case, and the rate of suicidality was compared between groups. RESULTS: A total of 2,198 adults with major were matched to 10,990 individuals. Suicidality was increased in the trauma cohort (OR, 4.31). This increase persisted even if adjusted for anxiety/mood disorders and substance abuse (adjusted OR1, 3.65) as well as residence, physical comorbidities, income quintile and those factors in adjusted OR1 (adjusted OR2, 3.30). All ORs were significant with p < 0.05 CONCLUSION: Individuals who experience major traumatic injuries are at a greater risk for postinjury suicidality compared with those in a matched cohort. LEVEL OF EVIDENCE: Epidemiologic study, level IV.


Assuntos
Suicídio/estatística & dados numéricos , Ferimentos e Lesões/psicologia , Adulto , Estudos de Casos e Controles , Feminino , Humanos , Escala de Gravidade do Ferimento , Masculino , Manitoba/epidemiologia , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Suicídio/psicologia , Tentativa de Suicídio/psicologia , Tentativa de Suicídio/estatística & dados numéricos
19.
Diabetes Res Clin Pract ; 102(2): 129-37, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24149065

RESUMO

AIMS: To examine trends in patient health outcomes 2001-2010 for patients receiving free annual diabetes reviews in New Zealand. METHODS: Clinical, demographic and hospital admissions data were analysed for 2175 Type 1 and 25,436 Type 2 diabetes mellitus patients presenting at 170 general practices. Changes in clinical measures and proportions of patients achieving guideline targets and receiving recommended processes of care were assessed by calendar year and for patients returning for successive annual diabetes reviews. We also examined trends in hospital admission rates for diabetes complications over the ten years. RESULTS: The proportion of patients achieving guideline levels for blood pressure and cholesterol increased significantly and there were decreases in smoking rates and mean BMI for patients reviewed five times. The proportion of patients meeting guideline levels for HbA1c increased by year but decreased in patients returning for five reviews. There was also a reduction in the proportion of patients with poor glycaemic control (HbA1c>9.0% (75 mmol/mol)). The proportion of Type 2 patients using oral hypoglycaemic agents or insulin and receiving a retinal exam in the last two years increased significantly, and over 90% of patients received foot checks. Hospital admission rates for ischaemic heart disease, peripheral circulatory disorders, and ketoacidosis all decreased over the period 2001-2010 but inpatient admissions for eye, neurological and renal problems specific to diabetes increased. CONCLUSIONS: There have been many improvements in health outcomes for these diabetes patients participating in the New Zealand government's programme to provide free annual health checks, despite the increasing age and diabetes duration of the patient cohorts.


Assuntos
Diabetes Mellitus Tipo 1/tratamento farmacológico , Diabetes Mellitus Tipo 2/tratamento farmacológico , Hipoglicemiantes/uso terapêutico , Insulina/uso terapêutico , Idoso , Complicações do Diabetes/tratamento farmacológico , Diabetes Mellitus Tipo 1/sangue , Diabetes Mellitus Tipo 1/epidemiologia , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Nova Zelândia/epidemiologia , Resultado do Tratamento
20.
Haemophilia ; 19(6): 870-5, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23786361

RESUMO

Patients with bleeding disorders previously frequently became infected with hepatitis C virus. We identified the number of patients infected in Scotland and assessed several aspects of the outcomes of HCV infection and its treatment comparing these with cohorts infected for other reasons. We calculated the number of individuals infected in Scotland (cohort A) starting with the total number of patients treated in Scottish haemophilia centres registered on the UKHCDO database between 1970 and 1989. Cases were then removed or added based on additional information from centre records. A second cohort B, consisted of 255 patients from cohort A and 47 patients HCV infected outside Scotland, but with follow-up data from Scottish centres around their HCV infection. We estimate that 455 patients with bleeding disorders became infected by coagulation factor provided by NHS Scotland. In 302 individuals with documented HCV infection, rates of natural clearance (17.4%), genotype spread (64% genotype 1) and responses to antiviral therapy (14.5% with monotherapy; 38.8% with combination therapy) were similar to those in other cohorts. Thirty-four liver biopsies were performed without adverse event and liver transplantation has been performed in 11 patients, seven for liver failure, four for hepatocellular carcinoma. Around 455 patients with bleeding disorders became HCV infected in Scotland before 1989. The natural history of HCV infection and responses to treatment are similar to those in other HCV-infected cohorts. Liver transplantation has been used successfully for the treatment of end-stage liver failure and hepatocellular carcinoma.


Assuntos
Antivirais/uso terapêutico , Transtornos Herdados da Coagulação Sanguínea/tratamento farmacológico , Coagulantes/uso terapêutico , Hepatite C/tratamento farmacológico , Adulto , Carcinoma Hepatocelular/epidemiologia , Carcinoma Hepatocelular/terapia , Coagulantes/efeitos adversos , Estudos de Coortes , Quimioterapia Combinada , Feminino , Genótipo , Hepacivirus/genética , Hepatite C/epidemiologia , Hepatite C/etiologia , Humanos , Fígado/patologia , Falência Hepática/epidemiologia , Falência Hepática/terapia , Neoplasias Hepáticas/epidemiologia , Neoplasias Hepáticas/terapia , Transplante de Fígado , Masculino , Pessoa de Meia-Idade , Escócia , Resultado do Tratamento , População Branca
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