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1.
Transfus Apher Sci ; 57(5): 661-664, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-30087087

RESUMO

BACKGROUND: Lipoprotein apheresis (LA) is the elective therapy for homozygous and other forms of Familial Hypercholesterolemia, Familial Combined Hypercholesterolemia, resistant/intolerant to lipid lowering drugs, and hyper-lipoproteinemia(a). Lipoprotein(a) [Lp(a)] has been classified as the most prevalent genetic risk factor for coronary artery disease and aortic valve stenosis. AIM: Our multicenter retrospective study has the aim to analyze the incidence of adverse cardiovascular events (ACVE) before and during the LA treatment, in subjects with elevated level of Lp(a) (>60 mg/dL) [hyper-Lp(a)] and chronic ischemic heart disease. METHODS: We collected data of 23 patients (mean age 63 ± 9 years, male 77%; from hospital of Pisa 11/23, Pistoia 7/23, Verona 2/23, Padova 2/23 and Ferrara 1/23), with hyper-Lp(a), pre-apheresis LDL-cholesterol <100 mg/dL, cardiovascular disease, on maximally tolerated lipid lowering therapy and LA treatment (median 7 years, interquartile range 3-9 years). The LA treatment was performed by heparin-induced LDL precipitation apheresis (16/23), dextran-sulphate (4/23), cascade filtration (2/23) and immunoadsorption (1/23). The time lapse between first cardiovascular event and beginning of apheresis was 6 years (interquartile range 1-12 years). RESULTS: The recorded ACVE, before and after the LA treatment inception, were 40 and 10 respectively (p < 0.05), notably, the AVCE rates/year were 0.43 and 0.11 respectively (p < 0.05) with a 74% reduction of event occurrence. CONCLUSIONS: Our data confirm long-term efficacy and positive impact of LA on morbidity in patients with hyper-Lp(a) and chronic ischemic heart disease on maximally tolerated lipid lowering therapy.


Assuntos
Doenças Cardiovasculares/genética , Doenças Cardiovasculares/metabolismo , Lipoproteína(a)/metabolismo , Idoso , Humanos , Incidência , Pessoa de Meia-Idade , Projetos Piloto , Estudos Retrospectivos
2.
Gerontology ; 64(5): 414-421, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29768278

RESUMO

BACKGROUND: The protein Klotho is involved in biological processes related to longevity, cardiovascular health, and cognition. Serum Klotho levels have been associated with better cognition in animal models; moreover, lower Klotho concentrations in cerebrospinal fluid from subjects with late-onset Alzheimer's disease (LOAD) have been reported. OBJECTIVE: Our study aimed to examine the possible relationship between Klotho plasma concentrations and cognitive status in the elderly. METHODS: We evaluated plasma Klotho levels in a sample of 320 elderly patients admitted to a Memory Clinic. Four groups of subjects were enrolled, including cognitively intact individuals complaining about memory loss (controls) and patients affected by LOAD, mild cognitive impairment, or vascular dementia (VD). The sample was stratified by plasma Klotho tertiles. RESULTS: Lower levels of plasma Klotho (1st tertile) were associated with older age, higher prevalence of VD, single/multiple lacunar infarcts and leukoaraiosis, coronary heart disease and stroke, and higher levels of creatinine, homocysteine, and high-sensitivity C-reactive protein. On multivariate logistic regression analysis, the risk of VD was 3- and 4-fold in subjects belonging to the 1st tertile (≤514.8 pg/mL, OR 3.54, 95% CI 1.05-11.93) and 2nd tertile (> 514.8, < 659.1 pg/mL, OR 4.28, 95% CI 1.30-14.06) compared to the 3rd tertile (≥659.1 pg/mL). A significantly increased VD risk was found for Klotho values < 680 pg/mL. CONCLUSION: In a sample of elderly individuals, we found a significant association between low plasma Klotho levels and VD, but not LOAD. This finding suggests that, although these 2 forms of dementia might overlap, some physiopathological mechanisms related to VD and LOAD remain distinct.


Assuntos
Doença de Alzheimer/sangue , Demência Vascular/sangue , Glucuronidase/sangue , Idoso , Idoso de 80 Anos ou mais , Doença de Alzheimer/psicologia , Biomarcadores/sangue , Estudos de Casos e Controles , Cognição/fisiologia , Disfunção Cognitiva/sangue , Demência Vascular/psicologia , Feminino , Humanos , Proteínas Klotho , Modelos Logísticos , Masculino , Análise Multivariada , Fatores de Risco
3.
BMC Neurol ; 16: 165, 2016 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-27608765

RESUMO

BACKGROUND: Fahr's disease is rare a neurodegenerative idiopathic condition characterized by symmetric and bilateral calcifications of basal ganglia, usually associated with progressive neuropsychiatric dysfunctions and movement disorders. The term "Fahr's syndrome" is used in presence of calcifications secondary to a specific cause, but the variability of etiology, pathogenesis, and clinical picture underlying this condition have raised the question of the real existence of a syndrome. Several classifications based on the etiology, the location of brain calcifications and the clinical presentation have been proposed. Here we describe seven clinical cases of basal ganglia calcifications, in order to search for pathognomonic features and correlations between clinical picture and imaging findings. CASES PRESENTATION: The patients came to our attention for different reasons (most of them for memory/behavior disturbances); all underwent neuro-psychologic evaluation and neuro-imaging. All patients showed variable degrees of deterioration in cognitive function; anxiety and depression were frequent too, and resistant to treatment in all cases. Less frequent, but severe if present, were psychotic symptoms, with different grade of structure and emotional involvement, and always resistant to treatment. We observed only few cases of extrapyramidal disorders related to the disease itself; anyway, mild extrapyramidal syndrome occurred quite frequently after treatment with antipsychotics. CONCLUSION: Based on these findings we discourage the use of the term "Fahr's syndrome", and suggest to refer to Idiopathic or Secondary basal ganglia calcification. Unlike early onset forms (idiopathic or inherited), the clinical presentation of late onset form and Secondary basal ganglia calcification seems to be really heterogeneous. Case-control studies are necessary to determine the actual significance of basal ganglia calcification in the adult population and in the elderly, in cognitive, physical and emotional terms.


Assuntos
Doenças dos Gânglios da Base/patologia , Doenças dos Gânglios da Base/fisiopatologia , Calcinose/patologia , Calcinose/fisiopatologia , Doenças Neurodegenerativas/patologia , Doenças Neurodegenerativas/fisiopatologia , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Síndrome
4.
Lancet ; 381(9860): 40-6, 2013 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-23122768

RESUMO

BACKGROUND: Patients with homozygous familial hypercholesterolaemia respond inadequately to existing drugs. We aimed to assess the efficacy and safety of the microsomal triglyceride transfer protein inhibitor lomitapide in adults with this disease. METHODS: We did a single-arm, open-label, phase 3 study of lomitapide for treatment of patients with homozygous familial hypercholesterolemia. Current lipid lowering therapy was maintained from 6 weeks before baseline through to at least week 26. Lomitapide dose was escalated on the basis of safety and tolerability from 5 mg to a maximum of 60 mg a day. The primary endpoint was mean percent change in levels of LDL cholesterol from baseline to week 26, after which patients remained on lomitapide through to week 78 for safety assessment. Percent change from baseline to week 26 was assessed with a mixed linear model. FINDINGS: 29 men and women with homozygous familial hypercholesterolaemia, aged 18 years or older, were recruited from 11 centres in four countries (USA, Canada, South Africa, and Italy). 23 of 29 enrolled patients completed both the efficacy phase (26 weeks) and the full study (78 weeks). The median dose of lomitapide was 40 mg a day. LDL cholesterol was reduced by 50% (95% CI -62 to -39) from baseline (mean 8·7 mmol/L [SD 2·9]) to week 26 (4·3 mmol/L [2·5]; p<0·0001). Levels of LDL cholesterol were lower than 2·6 mmol/L in eight patients at 26 weeks. Concentrations of LDL cholesterol remained reduced by 44% (95% CI -57 to -31; p<0·0001) at week 56 and 38% (-52 to -24; p<0·0001) at week 78. Gastrointestinal symptoms were the most common adverse event. Four patients had aminotransaminase levels of more than five times the upper limit of normal, which resolved after dose reduction or temporary interruption of lomitapide. No patient permanently discontinued treatment because of liver abnormalities. INTERPRETATION: Our study suggests that treatment with lomitapide could be a valuable drug in the management of homozygous familial hypercholesterolaemia. FUNDING: FDA Office of the Orphan Product Development, Aegerion Pharmaceuticals.


Assuntos
Benzimidazóis/uso terapêutico , Proteínas de Transporte/antagonistas & inibidores , Hiperlipoproteinemia Tipo II/tratamento farmacológico , Benzimidazóis/efeitos adversos , LDL-Colesterol/sangue , Feminino , Homozigoto , Humanos , Hiperlipoproteinemia Tipo II/sangue , Hiperlipoproteinemia Tipo II/genética , Masculino
6.
J Clin Lipidol ; 16(5): 591-595, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35945124

RESUMO

Familial chylomicronemia syndrome (FCS) is a rare and severe genetic disorder, characterized by marked elevation of plasma triglycerides, often diagnosed in infancy. We describe the long-term follow-up (almost 60 years), the diagnostic assessment and the management of two siblings with severe hypertriglyceridemia and a history of pancreatitis who also developed cardiovascular complications later in life. We recently disclosed that the surviving index case was homozygous for a pathogenic LPL gene variant (c.984 G>T, p.M328I). The same variant was also found in two apparently unrelated siblings with FCS living in the same geographical area as the index case.


Assuntos
Hiperlipoproteinemia Tipo I , Hipertrigliceridemia , Humanos , Hiperlipoproteinemia Tipo I/diagnóstico , Hiperlipoproteinemia Tipo I/genética , Irmãos , Seguimentos , Hipertrigliceridemia/genética , Lipase Lipoproteica/genética
7.
Monaldi Arch Chest Dis ; 76(4): 160-7, 2011 Dec.
Artigo em Italiano | MEDLINE | ID: mdl-22567731

RESUMO

The primary aim of the STAR Study (Statins Target Assessment in Real practice) was to determine the LDL-cholesterol reduction and to analyse patient's and therapeutic factors associated to LDL-cholesterol target attainment in newly treated subjects with statins in an unselected population in clinical practice setting. Administrative databases (including pharmaceutical prescriptions and hospital admissions) and laboratory test databases (including LDL-cholesterol values) of five local health units, distributed in Emilia Romagna, Toscana and Umbria, were linked. A retrospective cohort study was conducted and all subjects aged > or =18 years with a first prescription for statins (newly treated subjects) between January 1st, 2007 and June 30th, 2008 were included. All statin prescriptions over a 12 months follow-up period were considered and used to calculate adherence to treatment. Baseline and follow-up LDL-cholesterol, respectively, were defined according to the nearest determination to the first prescription for statins and to the end of the follow-up period. A total of 3.232 subjects was included, 1.516 males (47%) and 1.716 females (53%), with an average age equal to 65.9 +/- 11.3 years. Among included subjects, 22.,6% had a gap to LDL-cholesterol target <10%, 30.0% between 10 and 29%, 20.7% between 30 and 49%, and 26.7% . or =50%. Among those with a gap to target > or =50%, 30-49%, and 10-29%, respectively, LDL-cholesterol target was attained by 7.1%, 41.8%, and 62.% of subjects. LDL-cholesterol target attainment was associated to gap to target, adherence with treatment, and type of statin.


Assuntos
Doenças Cardiovasculares/tratamento farmacológico , Transtornos Cerebrovasculares/tratamento farmacológico , LDL-Colesterol/efeitos dos fármacos , Complicações do Diabetes/tratamento farmacológico , Diabetes Mellitus/tratamento farmacológico , Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Hipercolesterolemia/tratamento farmacológico , Idoso , Algoritmos , Azetidinas/uso terapêutico , Biomarcadores/sangue , Doenças Cardiovasculares/sangue , Doenças Cardiovasculares/complicações , Transtornos Cerebrovasculares/sangue , Transtornos Cerebrovasculares/complicações , LDL-Colesterol/sangue , Estudos de Coortes , Ezetimiba , Feminino , Fluorbenzenos/uso terapêutico , Seguimentos , Humanos , Hipercolesterolemia/sangue , Hipercolesterolemia/etiologia , Itália , Lovastatina/uso terapêutico , Masculino , Adesão à Medicação , Pessoa de Meia-Idade , Pravastatina/uso terapêutico , Pirimidinas/uso terapêutico , Estudos Retrospectivos , Medição de Risco , Fatores de Risco , Rosuvastatina Cálcica , Sinvastatina/uso terapêutico , Sulfonamidas/uso terapêutico , Resultado do Tratamento
8.
Acta Biomed ; 81 Suppl 1: 95-9, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20518198

RESUMO

Over the last decades, testosterone replacement therapy for middle-aged and older men has been gaining increasing and widespread attention and popularity. Although several benefits of testosterone replacement therapy are well established, including but not limited to improvement in libido, body composition, and bone density, concerns for multiple potential adverse effects remain. In particular, concerns are frequently raised regarding the possibility that testosterone replacement therapy may increase the risks of prostate cancer and cardiovascular disease as consequence of a potential detrimental effect of testosterone on cardiovascular risk factors. This mini-review will present and discuss the current knowledge on the relationship between testosterone replacement therapy and change in lipid fractions in older men.


Assuntos
Androgênios/uso terapêutico , Metabolismo dos Lipídeos , Testosterona/uso terapêutico , Idoso , Envelhecimento , Humanos , Lipídeos/sangue , Masculino , Testosterona/sangue
9.
PLoS One ; 12(9): e0185307, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28957382

RESUMO

BACKGROUND: While the relationship between total cholesterol (TC) and cardiovascular disease (CVD) progressively weakens with aging, several studies have shown that low TC is associated with increased mortality in older individuals. However, the possible additive/synergic contribution of the two most important cholesterol rich fractions (LDL-C and HDL-C) to mortality risk has not been previously investigated. Our study aimed to investigate the relationship between baseline LDL-C and HDL-C, both separately and combined, and 9-years mortality in a sample of community dwelling older individuals from the InCHIANTI study. METHODS AND FINDINGS: 1044 individuals over 64 years were included. CVD and cancer mortality were defined by ICD-9 codes 390-459 and 140-239, respectively. LDL-C <130 mg/dL (3.36 mmol/L) was defined as "optimal/near optimal". Low HDL-C was defined as <40/50 mg/dL (1.03/1.29 mmol/L) in males/females, respectively. Nine-years mortality risk was calculated by multivariate Cox proportional hazards model. We found that, compared to subjects with high LDL-C and normal HDL-C (reference group), total mortality was significantly increased in subjects with optimal/near optimal LDL-C and low HDL-C (H.R.:1.58; 95%CI:1.11-2.25). As regards the specific cause of death, CVD mortality was not affected by LDL-C/HDL-C levels, while cancer mortality was significantly increased in all subjects with optimal/near optimal LDL-C (with normal HDL-C: H.R.: 2.49; with low HDL-C: H.R.: 4.52). Results were unchanged after exclusion of the first three years of follow-up, and of subjects with low TC (<160 g/dL-4.13 mmol/L). CONCLUSIONS: Our findings suggest that, in community dwelling older individuals, the combined presence of optimal/near optimal LDL-C and low HDL-C represents a marker of increased future mortality.


Assuntos
HDL-Colesterol/metabolismo , LDL-Colesterol/metabolismo , Idoso , Causas de Morte , Feminino , Seguimentos , Humanos , Itália , Masculino , Análise Multivariada , Modelos de Riscos Proporcionais , Análise de Sobrevida
10.
Acta Diabetol ; 53(4): 661-7, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27020053

RESUMO

AIMS: Individuals with type 2 diabetes show shorter leukocyte telomere length (LTL) compared to people without diabetes. Reduced LTL is associated with increased carotid intima-media thickness (IMT) in healthy subjects. The aim of the study is to assess whether LTL also correlates with IMT in patients with diabetes. METHODS: In a cohort of 104 subjects with type 2 diabetes and atherogenic dyslipidemia, we assessed anthropometric, hemodynamic and metabolic parameters. Common carotid IMT was expressed as the maximum IMT. LTL was assessed by a specific real-time PCR reaction. RESULTS: At univariate analysis, IMT values were positively correlated with age (p < 0.001), previous history of cardiovascular events (p < 0.005), fasting plasma glucose (p < 0.01), HbA1c (p < 0.05) and negatively correlated with LTL (p < 0.05). In a multivariate model, age (p < 0.001) and LTL (p < 0.05) were the only independent predictors of maximum IMT, with an adjusted R (2) of 0.22. CONCLUSIONS: LTL is an independent predictor of subclinical atherosclerosis pointing to a role of LTL as an early marker of vascular burden and cardiovascular disease also in type 2 diabetes.


Assuntos
Aterosclerose/genética , Diabetes Mellitus Tipo 2/genética , Angiopatias Diabéticas/genética , Encurtamento do Telômero , Idoso , Aterosclerose/complicações , Biomarcadores/sangue , Espessura Intima-Media Carotídea , Estudos Transversais , Diabetes Mellitus Tipo 2/complicações , Feminino , Humanos , Leucócitos/citologia , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase em Tempo Real
11.
BBA Clin ; 5: 25-8, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27051586

RESUMO

BACKGROUND: Diverse research approaches support the concept that a clinical diagnosis of Late-Onset Alzheimer's Disease (LOAD) does not distinguish between subpopulations with differing neuropathologies, including dementia patients with amyloid deposition and dementia patients without amyloid deposition but with cortical thinning. Mild cognitive impairment (MCI) is generally considered the prodromal phase for LOAD, however, while a number of studies have attempted to define plasma biomarkers for the conversion of MCI to LOAD, these studies have not taken into account the heterogeneity of patient cohorts within a clinical phenotype. METHODS: Studies of MCI and LOAD in several laboratories have demonstrated decrements in ethanolamine plasmalogen levels in plasma and brain and increased levels of diacylglycerols in plasma and brain. To further extend these studies and to address the issue of heterogeneity in MCI and LOAD patient groups we investigated the levels of diacylglycerols and ethanolamine plasmalogens in larger cohorts of patients utilizing, high-resolution (0.2 to 2 ppm mass error) mass spectrometry. RESULTS: For the first time, our lipidomics data clearly stratify both MCI and LOAD subjects into 3 different patient cohorts within each clinical diagnosis. These include i) patients with lower circulating ethanolamine plasmalogen levels; ii) patients with augmented plasma diacylglycerol levels; and iii) patients with neither of these lipid alterations. CONCLUSIONS: These represent the first serum biochemical data to stratify MCI and LOAD patients, advancing efforts to biochemically define patient heterogeneity in cognitive disorders. GENERAL SIGNIFICANCE: Lipidomics offers a new approach for identifying biomarkers and biological targets in cognitive disorders.

12.
Metabolism ; 51(11): 1463-70, 2002 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-12404199

RESUMO

Hormone replacement therapy (HRT) seems to have a favorable influence on the plasma lipid profile. Only a few investigations have examined the effects of HRT versus hepatic hydroxymethyl glutaryl coenzyme A (HMG-CoA) reductase inhibitors. We compared the relative effects of different hypolipidemic strategies on lipoproteins and coagulative parameters in women with recent-onset spontaneous menopause. In this 24-week, placebo-controlled trial, 60 consecutive healthy women aged >/= 45 years, with amenorrhea from 6 to 60 months (mean, 1.9 +/- 1.4 years), serum follicle stimulating hormone (FSH) greater than 40 U/L, and slight to moderate hypercholesterolemia (low-density lipoprotein-cholesterol [LDL-C] 160 to 250 mg/dL, high-density lipoprotein-cholesterol [HDL-C] < 75 mg/dL, and triglycerides < 200 mg/dL) were enrolled and randomized to dietetic advice (placebo group), simvastatin 10 mg, 0.625 mg of conjugated equine estrogen (CEE), or 50 microg estrogen transdermal patch (ETP). In the latter 2 cases, the progestative nomegestrol was added to estrogens (days 17 to 28 of the cicle). Lipoprotein parameters were evaluated after separating very-low-density lipoproteins (VLDLs) by ultracentrifugation, while fasting glucose and insulin, homocysteine, and hemocoagulative parameters were determined in plasma. Fifty-four patients completed the trial. Total cholesterol (TC) and LDL-C significantly decrased in the simvastatin (-62 mg/dL [-20%] and -72 mg/dL [-30%], respectively), CEE (-42 mg/dL [-13%] and -45 mg/dL [-18%]), and ETP (-30 mg/dL [-10%] and -26 mg/dL [-11%]) groups compared to baseline, but only simvastatin showed an effect significantly superior to diet alone. Apolipoprotein (Apo) B was decreased by simvastatin (-25%, P <.001) and by CEE (-10%, P <.05); again, simvastatin was more effective than either diet or ETP. Triglyceride concentration and VLDL-C were unmodified by treatments. HDL-C and Apo A-I significantly increased in the simvastatin group (+18% and +8%, respectively), while HDL-C was unmodified by both HRT regimens and Apo A-I was reduced by ETP treatment (-17%); lipoprotein[a] (Lp[a]) was decreased by both HRTs (-38%, P <.05, and -22%, P =.07, for CEE and ETP, respectively). Among coagulative parameters, plasminogen activator inhibitor-1 (PAI-1) was significantly reduced by CEE (-29%, P <.05) but not ETP treatment (+16%, P = not significant), while fibrinogen, antithrombin, and homocysteine were unaffected by therapy. Thus, HRT, particularly CEE, seems well tolerated and moderately effective in improving the lipid pattern and, perhaps, the coagulative/fibrinolytic balance in postmenopausal hypercholesterolemic women; it may represent a therapeutic option in slightly dyslipidemic subjects. Statins are preferred in case of more severe disease.


Assuntos
Anticolesterolemiantes/administração & dosagem , Terapia de Reposição de Estrogênios , Inibidores de Hidroximetilglutaril-CoA Redutases/administração & dosagem , Hipercolesterolemia/tratamento farmacológico , Lipídeos/sangue , Pós-Menopausa , Sinvastatina/administração & dosagem , Administração Cutânea , Administração Oral , Antitrombina III/metabolismo , Apolipoproteína A-I/sangue , Apolipoproteínas B/sangue , HDL-Colesterol/sangue , LDL-Colesterol/sangue , Terapia de Reposição de Estrogênios/métodos , Estrogênios Conjugados (USP)/administração & dosagem , Feminino , Fibrinogênio/metabolismo , Homocisteína/sangue , Humanos , Lipoproteína(a)/sangue , Pessoa de Meia-Idade , Inibidor 1 de Ativador de Plasminogênio/sangue , Progestinas/administração & dosagem , Resultado do Tratamento , Triglicerídeos/sangue
13.
Metabolism ; 52(10): 1250-7, 2003 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-14564675

RESUMO

The aim of our study was to evaluate the effect of a standardized formulation of a polyphenolic extract of grapes (Leucoselect-Phytosome [LP]) on low-density lipoprotein (LDL) susceptibility to oxidation in a group of heavy smokers. A randomized, double-blind, crossover study was undertaken in 24 healthy male heavy smokers, aged > or = 50 years. Enrolled subjects were given 2 capsules twice daily for 4 weeks (phase 1). Each capsule contained 75 mg of a grape procyanidin extracts and soy-phosphatidlcholine or placebo consisiting of 75 mg lactose and soy-phosphatidlcholine. A wash out period of 3 weeks was then followed by 4 weeks of the opposite treatment (phase 2). Blood samples were taken at baseline and at the end of each phase and assayed for plasma lipids and LDL susceptibility to oxidation. Compliance was good, and no adverse effects were recorded. Subjects did not show significant modification of total cholesterol (TC), triglycerides (TG), high-density lipoprotein-cholesterol (HDL-C) and LDL-C during LP treatment. Among oxidative indices, thiobarbituric acid reactive substances (TBARS) concentration was significantly reduced in subjects taking LP (-14.7% +/- 21.1% v +5.0% +/- 18.1%, P <.01), and the lag phase prolonged (+15.4% +/- 24.4% v -0.1% +/- 16.0%, P <.05) compared with placebo and basal values. The antioxidant potential of grape seed extract polyphenols may prove effective in a model of oxidative stress (smoking); however more investigational data are needed before use in wider clinical settings.


Assuntos
Antioxidantes/farmacologia , Biflavonoides , Catequina/farmacologia , LDL-Colesterol/sangue , Estresse Oxidativo , Proantocianidinas , Fumar/sangue , Vitis , Antioxidantes/administração & dosagem , Antioxidantes/química , Carotenoides/sangue , Catequina/administração & dosagem , Catequina/química , HDL-Colesterol/sangue , Estudos Cross-Over , Método Duplo-Cego , Humanos , Licopeno , Masculino , Pessoa de Meia-Idade , Oxirredução , Extratos Vegetais/farmacologia , Fatores de Tempo , Tocoferóis/sangue , Resultado do Tratamento , Triglicerídeos/sangue , Vitamina A/sangue , beta Caroteno/sangue
14.
Atherosclerosis ; 226(1): 201-7, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23141584

RESUMO

Oxidized LDLs (ox.LDLs) uptake by macrophages inside the arterial wall is a crucial step in atherosclerotic disease, and some studies suggest that high ox.LDLs plasma levels might be associated with cardiovascular disease (CVD). However, whether high ox.LDLs continue to be a CVD risk factors in older persons is unknown. We investigated the clinical correlates of plasma ox.LDLs, and their role in predicting long-term CVD/cardiac mortality in 1025 older community dwelling individuals (mean age: 75.5 ± 7.4 years; females: 55%) from the InCHIANTI study. Kaplan-Meier curves were fitted to explore the relationship between tertiles of ox.LDLs (ox.LDL/LDL-C ratio) and time to CVD/cardiac death. Hazard Ratios (HR) were estimated by Cox regression analysis. At multivariate analysis, ox.LDLs were independently associated with LDL-C, triglycerides, and HDL-C (adjusted r(2): 0.42; P = 0.001). The ox.LDL/LDL-C ratio (the extent of LDLs oxidation) was independently correlated with HDL-C, triglycerides, and beta-carotene (adjusted r(2): 0.15, P = 0.001). Among 1025 individuals, 392 died after 9 years, 166 from CVD. The HR for CVD/cardiac mortality was not significantly different across tertiles of ox.LDLs or ox.LDL/LDL-C ratio, both in the whole sample and in individuals with prevalent CVD. We conclude that in an elderly population LDL-C, triglycerides, and HDL-C are the most important determinants of ox.LDLs levels, indirectly suggesting an association between small dense LDLs and LDLs oxidation. No association emerged between higher ox.LDLs levels and 9 years CVD/cardiac mortality, suggesting that in advanced age the prognostic information added by ox.LDLs on CVD/cardiac mortality might be negligible.


Assuntos
Lipoproteínas LDL/sangue , Idoso , Biomarcadores/sangue , Doenças Cardiovasculares/sangue , Doenças Cardiovasculares/mortalidade , Feminino , Seguimentos , Humanos , Masculino , Estudos Prospectivos , Fatores de Tempo
15.
Am J Cardiol ; 105(12): 1825-30, 2010 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-20538138

RESUMO

Lipoprotein(a) (Lp[a]) may represent an independent risk factor for peripheral arterial disease of the lower limbs (LL-PAD), but prospective data are scant. We estimated the association between baseline Lp(a) with prevalent and incident LL-PAD in older subjects from the InCHIANTI Study. LL-PAD, defined as an ankle-brachial index <0.90, was assessed at baseline and over a 6-year follow-up in a sample of 1,002 Italian subjects 60 to 96 years of age. Plasma Lp(a) and potential traditional and novel cardiovascular risk factors (including a score based on relevant inflammatory markers) were entered in multivariable models to assess their association with prevalent and incident LL-PAD. At baseline, Lp(a) concentration was directly related to the number of increased inflammatory markers (p <0.05). There were 125 (12.5%) prevalent cases of LL-PAD and 57 (8.3%) incident cases. After adjustment for potential confounders, participants in the highest quartile of the Lp(a) distribution (>/=32.9 mg/dl) were more likely to have LL-PAD compared to those in the lowest quartile (odds ratio [OR] 1.83, 95% confidence interval [CI] 1.01 to 3.33). The association was stronger (OR 3.80, 95% CI 1.50 to 9.61) if LL-PAD was defined by harder criteria, namely an ankle-brachial index <0.70. Compared to subjects in the lowest Lp(a) quartile, those in the highest quartile showed a somewhat increased risk of incident LL-PAD (lowest quartile 7.7%, highest quartile 10.8%), but the association was not statistically significant (OR 1.52, 95% CI 0.71 to 3.22). In conclusion, Lp(a) is an independent LL-PAD correlate in the cross-sectional evaluation, but further prospective studies in larger populations, with longer follow-up and more definite LL-PAD ranking, might be needed to establish a longitudinal association.


Assuntos
Inflamação/sangue , Lipoproteína(a)/sangue , Doenças Vasculares Periféricas/sangue , População Urbana , Distribuição por Idade , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Biomarcadores/sangue , Pressão Sanguínea , Artéria Braquial/diagnóstico por imagem , Artéria Braquial/fisiopatologia , Ensaio de Imunoadsorção Enzimática , Feminino , Seguimentos , Humanos , Incidência , Inflamação/epidemiologia , Itália/epidemiologia , Masculino , Pessoa de Meia-Idade , Doenças Vasculares Periféricas/epidemiologia , Doenças Vasculares Periféricas/fisiopatologia , Prevalência , Prognóstico , Estudos Prospectivos , Índice de Gravidade de Doença , Distribuição por Sexo , Artérias da Tíbia/diagnóstico por imagem , Artérias da Tíbia/fisiopatologia , Fatores de Tempo , Ultrassonografia Doppler
16.
Atherosclerosis ; 204(1): 202-7, 2009 May.
Artigo em Inglês | MEDLINE | ID: mdl-18926541

RESUMO

Cholesteryl ester transfer protein (CETP) is a plasma glycoprotein that catalyses the transfer of cholesteryl esters from HDL to the other plasma lipoproteins. Genetic deficiency of CETP is one of the known causes of elevation of plasma HDL-C (primary hyperalphalipoproteinemia, HALP). We sequenced CETP gene in a group of 24 Italian subjects with primary HALP (HDL-C>80 mg/dl) suspected to have CETP deficiency. Two unrelated subjects both coming from the same geographical district, were found to be heterozygous for a nucleotide substitution in exon 6 (c.544C>T) and another subject was found to be heterozygous for a C>T transition in exon 9 (c.802C>T). Both mutations introduce a premature stop codon and are predicted to cause the production of truncated proteins (Q165X and R268X, respectively) devoid of function. The fourth proband was found to carry a T>C substitution in intron 15 (c.1407+2T>C) predicted to abolish the function of the donor splice site. To define the effect of this mutation on CETP pre-mRNA splicing we analysed CETP mRNA in COS-1 cells expressing a CETP minigene harbouring the mutation. The analysis of minigene transcript in COS-1 cells showed that IVS15+2T>C mutation caused the formation of an abnormal mRNA in which exon 14 joins directly to exon 16, predicted to encode a truncated peptide of 435 amino acids. In mutation carriers plasma CETP activity was found to be reduced by 38-60%. These are the first mutations in the CETP gene found in Italian subjects with HALP.


Assuntos
Proteínas de Transferência de Ésteres de Colesterol/genética , Hiperlipoproteinemias/genética , Mutação , População Branca/genética , Adolescente , Adulto , Idoso , Animais , Biomarcadores/sangue , Células COS , Chlorocebus aethiops , Proteínas de Transferência de Ésteres de Colesterol/sangue , Proteínas de Transferência de Ésteres de Colesterol/deficiência , HDL-Colesterol/sangue , Análise Mutacional de DNA , Feminino , Humanos , Hiperlipoproteinemias/sangue , Hiperlipoproteinemias/enzimologia , Hiperlipoproteinemias/etnologia , Itália , Masculino , Pessoa de Meia-Idade , Fenótipo , RNA Mensageiro/metabolismo , Transfecção , Regulação para Cima , Adulto Jovem
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