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1.
Hum Reprod ; 36(5): 1310-1325, 2021 04 20.
Artigo em Inglês | MEDLINE | ID: mdl-33454781

RESUMO

STUDY QUESTION: Is the microRNA (miRNA) expression pattern of cumulus oophorus cells (COCs) in women undergoing medically assisted reproduction (MAR) procedures differentially modulated according to patient age and gonadotropin treatment strategy? SUMMARY ANSWER: Maternal age is an independent factor impacting miRNA expression in COCs while gonadotropin treatment may affect follicular miRNA expression and IVF efficacy. WHAT IS KNOWN ALREADY: Epigenetic mechanisms in female infertility are complex and poorly studied. DNA methylation, histone modifications, miRNAs and nucleosome positioning influence cellular machinery through positive and negative feedback mechanisms either alone or interactively. miRNAs are important regulators during oogenesis, spermatogenesis and early embryogenesis, and are reported to play a role in regulating crosstalk between the oocyte and COCs. Although miRNome analysis has been performed in female human reproductive tissues (endometrium, myometrium, cervix and ovaries), epigenetic modifications in women with infertility have not been explored in detail. In addition, the impact of gonadotropin treatments during MAR on miRNA expression in COCs has not been fully investigated. STUDY DESIGN, SIZE, DURATION: This study was carried out in 53 COC samples obtained from mature metaphase II (MII) oocytes in 53 women undergoing MAR treatment. A total of 38 samples for assay development were pooled by maternal age and gonadotropin treatment into four predetermined subgroups: ≥36 years and recombinant human FSH (r-hFSH), n = 10; ≥36 years and r-hFSH+ recombinant human-luteinizing hormone (r-hLH), n = 10; ≤35 years and r-hFSH, n = 9; ≤35 years and r-hFSH+r-hLH, n = 9. miRNome profiles were determined and compared between subgroups. Expression of defined miRNAs was validated in the remaining fifteen samples, representative of each subgroup, by quantitative polymerase chain reaction (PCR). PARTICIPANTS/MATERIALS, SETTING, METHODS: COCs were processed for miRNA-enriched total RNA extraction and pooled in homogeneous subgroups to obtain a sufficient amount and quality of starting material to perform the analysis. Each pooled sample underwent miRNA profiling using PCR assay system to examine expression of 752 human miRNAs without pre-amplification. Data were analyzed using the delta-delta Ct method for relative quantitation and prediction of target genes (with at least four algorithms predicting the same miRNA-gene interaction pair (HIT)>4). The miRSystem database provided functional annotation enrichment (raw P-value <0.05) of co-expressed miRNAs. MAIN RESULTS AND THE ROLE OF CHANCE: We found distinctive miRNA expression profiles in each subgroup correlating with age and MAR stimulation. In addition, a number of selective and co-expressed miRNAs were revealed by comparative analysis. A cluster of 37 miRNAs were commonly but differentially expressed in all four pools. Significant differences were observed in expression regulation of 37 miRNAs between age groups (≤35 or ≥36) in women receiving r-hFSH+r-hLH compared to those receiving r-hFSH alone. Higher concentrations and increased numbers of miRNAs were recorded in younger than in older patients, regardless of treatment. Functional and expression studies performed to retrieve common miRNome profiles revealed an enrichment of biological functions in oocyte growth and maturation, embryo development, steroidogenesis, ovarian hyperstimulation, apoptosis and cell survival, glucagon and lipid metabolism, and cell trafficking. The highest scored pathways of target genes of the 37 common miRNAs were associated with mitogen-activated protein kinase (MAPK) signaling pathways, G alpha signaling, transcription regulation, tight junctions, RNA polymerase I and III, and mitochondrial transcription. We identified a potential age- and MAR stimulation-dependent signature in the miRNA landscape of COCs. LIMITATIONS, REASONS FOR CAUTION: We cannot rule out the possibility that other unknown individual genetic or clinical factors may have interfered with the reported results. Since miRNA profiling was conducted with a predefined array of target probes, other miRNA molecules, potentially modulated by age and hormonal stimulation, may have been missed in this study. WIDER IMPLICATIONS OF THE FINDINGS: miRNA expression in COCs is modulated by gonadotropin treatment and correlates strongly with age. A better understanding of the expression patterns and functions of miRNAs may lead to the development of novel therapeutics to treat ovarian dysfunction and improve fertility in older women. STUDY FUNDING/COMPETING INTEREST: This study was funded by Merck KGaA, Darmstadt, Germany. All authors declared no competing interest, except SL and TD who are fully employed by Merck KGaA. TRIAL REGISTRATION NUMBER: N/A.


Assuntos
Células do Cúmulo , Oócitos , Idoso , Feminino , Fertilização in vitro , Alemanha , Humanos , Indução da Ovulação
2.
Aquat Toxicol ; 168: 72-7, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26448269

RESUMO

Due to the large production and growing use of titanium dioxide nanoparticles (n-TiO2), their release in the marine environment and their potential interaction with existing toxic contaminants represent a growing concern for biota. Different end-points of genotoxicity were investigated in the European sea bass Dicentrarchus labrax exposed to n-TiO2 (1mgL(-1)) either alone and combined with CdCl2 (0.1mgL(-1)) for 7 days. DNA primary damage (comet assay), apoptotic cells (diffusion assay), occurrence of micronuclei and nuclear abnormalities (cytome assay) were assessed in peripheral erythrocytes and genomic stability (random amplified polymorphism DNA-PCR, RAPD assay) in muscle tissue. Results showed that genome template stability was reduced after CdCl2 and n-TiO2 exposure. Exposure to n-TiO2 alone was responsible for chromosomal alteration but ineffective in terms of DNA damage; while the opposite was observed in CdCl2 exposed specimens. Co-exposure apparently prevents the chromosomal damage and leads to a partial recovery of the genome template stability.


Assuntos
Bass/fisiologia , Cromossomos/efeitos dos fármacos , Dano ao DNA , DNA/efeitos dos fármacos , Genoma/efeitos dos fármacos , Nanopartículas/toxicidade , Poluentes Químicos da Água/toxicidade , Animais , Bass/genética , Cádmio/toxicidade , Cloreto de Cádmio/toxicidade , Ensaio Cometa , Genômica , Técnica de Amplificação ao Acaso de DNA Polimórfico , Titânio/toxicidade
3.
Mar Environ Res ; 111: 144-8, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26392349

RESUMO

Titanium dioxide nanoparticles (TiO2-NPs) continuously released into waters, may cause harmful effects to marine organisms and their potential interaction with conventional toxic contaminants represents a growing concern for biota. We investigated the genotoxic potential of nanosized titanium dioxide (n-TiO2) (100 µg L(-1)) alone and in combination with CdCl2 (100 µg L(-1)) in Mytilus galloprovincialis after 4 days of in vivo exposure. RAPD-PCR technique and Micronucleus test were used to study genotoxicity. The results showed genome template stability (GTS) being markedly reduced after single exposure to n-TiO2 and CdCl2. Otherwise, co-exposure resulted in a milder reduction of GTS. Exposure to n-TiO2 was responsible for a significant increase of micronucleated cell frequency in gill tissue, while no chromosomal damage was observed after CdCl2 exposure as well as after combined exposure to both substances.


Assuntos
Cloreto de Cádmio/toxicidade , Nanopartículas Metálicas/toxicidade , Mutagênicos/toxicidade , Mytilus/efeitos dos fármacos , Titânio/toxicidade , Animais , Testes para Micronúcleos , Técnica de Amplificação ao Acaso de DNA Polimórfico
4.
Nutr Metab Cardiovasc Dis ; 23(4): 323-9, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-22365573

RESUMO

BACKGROUND AND AIMS: The G-protein regulator phosducin has been shown to be associated with stress-dependent blood pressure, but whether obesity is a modulator of the relationship between phosducin and risk of hypertension is unknown. We studied the effect of two phosducin polymorphisms on risk of hypertension in 273 overweight or obese (Ov-Ob) young-to-middle-age participants from the HARVEST and 287 normal weight (NW) participants. METHODS AND RESULTS: Genotyping of phosducin SNPs rs12402521 and rs6672836 was performed by real time PCR. For rs12402521, 64.6% of the participants were homozygous for the G allele, 27.9% heterozygous, and 7.5% homozygous for the A allele. During 7.7 years of follow-up, 339 subjects developed hypertension. In a Cox multivariable model, carriers of the A allele had a 1.28 (95% CI,1.00-1.63, p = 0.046) increased risk of hypertension. However, increased incidence of hypertension associated with A allele (AA + AG, 79% and GG, 59%, p = 0.001) was observed only among Ov-Ob individuals with a hazard ratio of 1.60 (95% CI, 1.13-2.21, p = 0.007) whereas in NW subjects the incidence of hypertension did not differ by genotype (56% in both groups). In the whole cohort, there was a significant interaction of phosducin genotype with body mass index on the risk of hypertension (p = 0.012). For SNP rs6672836 no association was found with incident hypertension. No haplotype effect was detected on the risk of hypertension. CONCLUSION: These data suggest that phosducin rs12402521 polymorphism is an important genetic predictor of obesity-related hypertension. In Ov-Ob carriers of the A allele aggressive nonpharmacological measures should be implemented.


Assuntos
Proteínas do Olho/genética , Reguladores de Proteínas de Ligação ao GTP/genética , Hipertensão/epidemiologia , Hipertensão/genética , Obesidade/epidemiologia , Sobrepeso/epidemiologia , Fosfoproteínas/genética , Polimorfismo Genético , Adulto , Fatores Etários , Índice de Massa Corporal , Estudos de Casos e Controles , Distribuição de Qui-Quadrado , Intervalo Livre de Doença , Feminino , Frequência do Gene , Predisposição Genética para Doença , Haplótipos , Heterozigoto , Homozigoto , Humanos , Hipertensão/diagnóstico , Incidência , Itália/epidemiologia , Estimativa de Kaplan-Meier , Modelos Logísticos , Masculino , Análise Multivariada , Obesidade/diagnóstico , Sobrepeso/diagnóstico , Fenótipo , Modelos de Riscos Proporcionais , Reação em Cadeia da Polimerase em Tempo Real , Medição de Risco , Fatores de Risco , Fatores de Tempo
5.
Kidney Int ; 70(3): 578-84, 2006 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16788693

RESUMO

Factors related to the development of microalbuminuria in hypertension are not well known. We did a prospective study to investigate whether glomerular hyperfiltration precedes the development of microalbuminuria in hypertension. We assessed 502 never-treated subjects screened for stage 1 hypertension without microalbuminuria at baseline and followed up for 7.8 years. Creatinine clearance was measured at entry. Urinary albumin and ambulatory blood pressure were measured at entry and during the follow-up until subjects developed sustained hypertension needing antihypertensive treatment. Subjects with hyperfiltration (creatinine clearance >150 ml/min/1.73 m2, top quintile of the distribution) were younger and heavier than the rest of the group and had a greater follow-up increase in urinary albumin than subjects with normal filtration (P<0.001). In multivariable linear regression, creatinine clearance adjusted for confounders was a strong independent predictor of final urinary albumin (P<0.001). In multivariable Cox regression, patients with hyperfiltration had an adjusted hazard ratio for the development of microalbuminuria based on at least one positive measurement of 4.0 (95% confidence interval (CI), 2.1-7.4, P<0.001) and an adjusted hazard ratio for the development of microalbuminuria based on two consecutive positive measurements of 4.4 (95% CI, 2.1-9.2, P<0.001), as compared with patients with normal filtration. Age, female gender, and 24 h systolic blood pressure were other significant predictors of microalbuminuria. In conclusion, stage 1 hypertensive subjects with glomerular hyperfiltration are at increased risk of developing microalbuminuria. Early intervention with medical therapy may be beneficial in these subjects even if their blood pressure falls below normal limits during follow-up.


Assuntos
Albuminúria/diagnóstico , Albuminúria/epidemiologia , Taxa de Filtração Glomerular , Hipertensão Renal/diagnóstico , Hipertensão Renal/epidemiologia , Adulto , Albuminúria/fisiopatologia , Feminino , Seguimentos , Humanos , Hipertensão Renal/fisiopatologia , Incidência , Modelos Lineares , Masculino , Análise Multivariada , Valor Preditivo dos Testes , Modelos de Riscos Proporcionais , Fatores de Risco , Distribuição por Sexo
6.
Blood Press ; 10(3): 176-83, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11688766

RESUMO

OBJECTIVE: The main purpose of this study was to compare efficacy, tolerability and influence on quality of life (QOL) of nifedipine gastrointestinal therapeutic system (NI) 30-60 mg once a day vs amlodipine (AM) 5-10 mg once a day in elderly patients with mild-moderate hypertension. DESIGN: This was a randomized, double-blind, parallel-group, multicenter study. After a 2-week single-blind placebo run-in, patients were randomized to either NI 30 mg or AM 5 mg. Responders continued on the same dosage for 16 additional weeks, while non-responders were titrated to 60 mg NI or 10 mg AM. METHODS: Blood pressure was measured by mercury sphygmomanometer and efficacy equivalence of NI and AM tested by covariance analysis. Diastolic blood pressure (DBP) was the primary efficacy parameter, its baseline value being taken as covariate while centers effect and treatment interaction were included as fixed effects in the analysis model. The secondary efficacy variables systolic blood pressure (SBP) and scores for QOL were analyzed according to the same model. RESULTS: At the end of the study, overall mean DBPs, calculated as least-square means (LSMEANS), in the "by protocol" population were 87.5 mmHg for NI and 86.7 for AM (difference 0.8 mmHg with 90% CI -1.2 to 2.8 mmHg). In the "by intention to treat" (ITT) population LSMEANS were 87.6 mmHg for NI and 86.4 mmHg for AM (difference 1.2 mmHg with 90% CI -0.6 to 3.1 mmHg). SBP LSMEANS in the "by protocol" population were 147.7 mmHg for NI and 147.3 mmHg for AM (difference 0.3 mmHg, with 90% CI -3.7 to 4.3); corresponding values in the "by ITT" population were 148.0 mmHg for NI and 147.2 for AM (difference 0.8 mmHg, with 90% CI -2.8 to 4.6). Mean values for QOL parameters were not significantly different. A total of 173 episodes of adverse events were documented in 54 patients (26 NI and 28 AM), dropouts were 15 (20% of group) on NI and 21 (28%) on AM. CONCLUSIONS: NI 30-60 mg was shown to be as efficacious and safe as AM 5-10 mg in elderly patients with mild-moderate hypertension. QOL improved compared to baseline with no significant difference between the two drugs, thus confirming a positive class effect for calcium antagonists.


Assuntos
Anlodipino/administração & dosagem , Bloqueadores dos Canais de Cálcio/administração & dosagem , Hipertensão/tratamento farmacológico , Nifedipino/administração & dosagem , Qualidade de Vida , Idoso , Idoso de 80 Anos ou mais , Anlodipino/efeitos adversos , Pressão Sanguínea/efeitos dos fármacos , Bloqueadores dos Canais de Cálcio/efeitos adversos , Método Duplo-Cego , Humanos , Hipertensão/complicações , Pessoa de Meia-Idade , Nifedipino/efeitos adversos , Equivalência Terapêutica
7.
Recenti Prog Med ; 92(9): 533-6, 2001 Sep.
Artigo em Italiano | MEDLINE | ID: mdl-11552309

RESUMO

Non secretory myeloma is a rare and unusual form of myeloma, characterized by the absence of monoclonal component in serum and urine. This peculiarity is usually believed to be caused by the incapacity of neoplastic plasmacells to synthesize or secrete M-component, but it is probably due to several pathogenetic mechanisms which are different from case to case. The diagnosis can be delayed by the non specific clinical pattern, especially in those cases where skeletal radiological studies do not reveal lytic lesions. The authors report two recently diagnosed cases of non secretory myeloma, underlying the main clinical and laboratory findings which led to the diagnosis of this singular syndrome. The diagnostic suspicion is often based, beside the clinical pattern at the onset, on the absence of serum and urinary monoclonal component, on the increase of PCR, of beta 2 microglobulin and on low levels of serum immunoglobulins. CT scans, MRI and Tc 99 MIBI bone marrow radionuclide studies are also useful in evaluating the therapeutic response which cannot be based on quantitative variations of the M-component. The clinical suspicion is confirmed by the bone marrow aspiration and trephine biopsy, showing a typical infiltration by plasmacells at various degree of maturation.


Assuntos
Mieloma Múltiplo/diagnóstico , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Síndrome
8.
Am J Hypertens ; 14(12): 1191-5, 2001 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-11775125

RESUMO

BACKGROUND: A nucleotide substitution (C-->T) at position 825 of the gene GNB3 encoding the beta3 subunit of heterotrimeric G proteins is associated with alternative splicing and enhanced signal transduction. There is accumulating evidence from different populations that the 825T allele is associated with increased prevalence of hypertension, obesity, and left ventricular hypertrophy. However, it is unclear to what extent the 825T allele has a direct influence on left ventricular structure, independently of the effects of pressure and body mass index. Therefore we explored whether the GNB3 825T allele is associated with increased left ventricular mass index in a selected and homogeneous group of young, never treated, mild hypertensives. PROCEDURES: Young subjects (n = 207, aged 18 to 45 years) were genotyped at the GNB3 825 locus. In each patient, 24-h ambulatory blood pressure (BP) measurement and two-dimensional guided M-mode echocardiography combined with Doppler sonography were performed. RESULTS: The genotype distribution among patients was in Hardy-Weinberg equilibrium. Patients carrying the 825T allele had an increased left ventricular mass index (95.1 +/- 1.5 v 89.7 +/- 1.5 g/m2; P = .01) in comparison to those with CC genotype. The association between left ventricular mass index and 825T allele was independent of gender, age, BP, heart rate, alcohol intake, and physical activity. CONCLUSIONS: In young patients with mild hypertension without heart disease the 825T allele is associated with an increased left ventricular mass index. These hypothesis-generating data suggest that GNB3 825T allele may be considered as one genetic marker predisposing to an increase in left ventricular mass in hypertensives, and justifies larger studies.


Assuntos
Proteínas Heterotriméricas de Ligação ao GTP/genética , Hipertensão/genética , Hipertrofia Ventricular Esquerda/genética , Transdução de Sinais/genética , Adulto , Fatores Etários , Substituição de Aminoácidos , Ecocardiografia , Feminino , Genótipo , Heterozigoto , Homozigoto , Humanos , Hipertrofia Ventricular Esquerda/diagnóstico por imagem , Hipertrofia Ventricular Esquerda/patologia , Masculino
9.
Recenti Prog Med ; 91(3): 113-5, 2000 Mar.
Artigo em Italiano | MEDLINE | ID: mdl-10763341

RESUMO

In these last years the authors have devoted themselves to chronic alcoholism rehabilitation. They have studied 99 over 65 years old subjects. In these subjects gastrointestinal pathology alcohol correlated incidence has been studied. An abdominal echography and an esophagogastroduodenoscopy have been performed in all these subjects. In some subjects, on the guide line of these tests, the authors have put through more tests: hepatosplenic scintigraphy, hepatic biopsy, laparoscopy, colonoscopy. Statistic elaboration was performed by chi-square test. The conclusions of this study are: 1) the diagnostic importance of association between echography and scintigraphy; 2) the low prevalence of severe hepatic alcohol related lesions in the elderly; 3) the importance of alcohol in hepatocarcinoma etiopathogenesis; 4) the incidence and the importance of phlogistic and ulcerous gastroduodenal lesions in elderly alcoholics.


Assuntos
Alcoolismo/complicações , Carcinoma Hepatocelular/etiologia , Hepatopatias Alcoólicas/epidemiologia , Neoplasias Hepáticas/etiologia , Abdome/diagnóstico por imagem , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Alcoolismo/diagnóstico , Alcoolismo/epidemiologia , Biópsia , Carcinoma Hepatocelular/diagnóstico , Carcinoma Hepatocelular/diagnóstico por imagem , Carcinoma Hepatocelular/epidemiologia , Distribuição de Qui-Quadrado , Estudos de Coortes , Endoscopia do Sistema Digestório , Fígado Gorduroso Alcoólico/epidemiologia , Gastroenteropatias/diagnóstico , Gastroenteropatias/epidemiologia , Gastroenteropatias/etiologia , Humanos , Fígado/patologia , Cirrose Hepática Alcoólica/epidemiologia , Hepatopatias Alcoólicas/diagnóstico , Hepatopatias Alcoólicas/diagnóstico por imagem , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/epidemiologia , Pessoa de Meia-Idade , Cintilografia , Ultrassonografia
10.
Am J Hypertens ; 13(1 Pt 1): 92-8, 2000 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-10678277

RESUMO

This study was undertaken to assess the reproducibility of office versus ambulatory heart rates in 839 hypertensive subjects participating in the Hypertension and Ambulatory Recording Venetia Study (HARVEST). A 24-hour heart rate was recorded twice; this procedure was repeated three months later. Reproducibility was better for ambulatory than for office measurement, and was greater for 24-hour than for daytime heart rate, and lowest for night-time heart rate. Reproducibility of office heart rate was impaired above 85 bpm, and was poorer in subjects with more severe office hypertension. A small but significant decrease in average daytime (-1 bpm, P < 0.0001) and virtually no change in night-time heart rate (-0.3 bpm, NS) were observed at repeat recording. Heart rate reproducibility indices were related to the extent of the heart rate and blood pressure white-coat effect, but did not vary according to age, gender, body mass index, day-night blood pressure difference, or alcohol or tobacco use. Results indicate that heart rate recorded over the 24 hours has a better reproducibility than office heart rate, and could thus be a better prognostic indicator than traditional measurement of resting heart rate in the hospital setting.


Assuntos
Frequência Cardíaca/fisiologia , Hipertensão/diagnóstico , Monitorização Ambulatorial , Adulto , Pressão Sanguínea/fisiologia , Ritmo Circadiano , Feminino , Humanos , Hipertensão/psicologia , Masculino , Reprodutibilidade dos Testes , Caracteres Sexuais
11.
J Hypertens ; 17(4): 465-73, 1999 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-10404947

RESUMO

OBJECTIVE: To determine whether the prediction of target-organ damage varies according to the reproducibility of 24 h blood pressure. SETTING: Seventeen hypertension clinics in northeast Italy. MAIN OUTCOME MEASURES: Correlations of left ventricular mass index and albumin excretion rate with 24 h and office blood pressures in relation to tertiles of ambulatory blood pressure reproducibility. PATIENTS AND METHODS: In 716 consecutive, stage I, hypertensives enrolled in the Hypertension and Ambulatory Recording Venetia Study (HARVEST), ambulatory blood pressure monitoring was performed twice, 3 months apart In all subjects, the albumin excretion rate was measured by radioimmunoassay, and in 567, the left ventricular mass index was assessed by echocardiography. RESULTS: The subjects were divided into tertiles of ambulatory blood pressure consistency (between-monitoring differences, regardless of the sign). In the tertile of subjects with good reproducibility, correlation coefficients of systolic and diastolic ambulatory blood pressure with left ventricular mass and urinary albumin excretion were significant and higher than those of office blood pressure. In contrast, in the two tertiles with poorer reproducibility, the coefficients were barely or not significant for both pressures. The advantage of ambulatory blood pressure over office blood pressure in predicting target-organ damage was no longer present for systolic blood pressure differences greater than 3.8 mmHg and diastolic blood pressure differences greater than 3.1 mmHg. CONCLUSIONS: These data indicate that ambulatory blood pressure is a better predictor of left ventricular mass and urinary albumin excretion than office blood pressure, but only in subjects with good pressure reproducibility. Therefore, the assessment of hypertensive patients should be based on duplicate blood pressure monitorings. Recordings with 24 h systolic and diastolic blood pressure differences greater than 4 and 3 mmHg, respectively, should be considered with caution.


Assuntos
Monitorização Ambulatorial da Pressão Arterial , Pressão Sanguínea , Hipertensão/fisiopatologia , Adolescente , Adulto , Albuminúria , Progressão da Doença , Ecocardiografia , Feminino , Humanos , Masculino , Taxa de Depuração Metabólica , Análise de Regressão , Reprodutibilidade dos Testes , Disfunção Ventricular Esquerda/diagnóstico por imagem , Disfunção Ventricular Esquerda/fisiopatologia
12.
Am J Hypertens ; 11(2): 147-54, 1998 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-9524042

RESUMO

It has been claimed that diastolic dysfunction is the earliest cardiac abnormality in hypertension, preceding the development of left ventricular (LV) structural abnormalities. To detect early signs of hypertensive cardiac involvement 722 subjects (533 men and 189 women), 18-45 years old, with stage I hypertension, were studied by M-mode and Doppler echocardiography. Blood pressure was measured by 24-h ambulatory monitoring. Ninety-five normotensive individuals of similar age and gender distributions were studied as controls. Significant, though modest, changes of LV mass and geometry were found in the participants in comparison with the normotensive controls. The increment was +10.4 g/m2 for LV mass index, +1.8 mm for LV wall thickness, and +0.032 for relative wall thickness. A slight increase in atrial filling peak velocity was found in the hypertensive subjects at Doppler analysis of transmitral flow, but the ratio of early to atrial velocity of LV diastolic filling did not differ between the two groups. In multiple regression analyses, which included age, body mass index, heart rate, smoking, and physical activity, 24-h mean blood pressure emerged as a significant predictor of LV mass index (men, P = .003; women, P = .04) and wall thickness (men, P = .03; women, P = .004) in the hypertensive subjects, whereas no index of diastolic filling was significantly associated with ambulatory blood pressure in either gender. The present data indicate that changes in LV anatomy are the earliest signs of hypertensive cardiac involvement. Left ventricular filling is affected only marginally in the initial phase of hypertension.


Assuntos
Diástole , Hipertensão/complicações , Hipertrofia Ventricular Esquerda/etiologia , Adolescente , Adulto , Feminino , Humanos , Hipertensão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Análise de Regressão , Função Ventricular Esquerda
13.
Hypertension ; 31(1): 57-63, 1998 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-9449391

RESUMO

Controversy remains on whether white coat hypertension is a benign clinical condition or carries an increased risk of target-organ damage. Nine hundred forty-two stage I hypertensive subjects enrolled in the HARVEST trial underwent 24-hour ambulatory blood pressure monitoring and urine collection for albumin measurement. Reliable echocardiographic data were obtained in 722 subjects. White coat hypertensive subjects were defined on the basis of three different partition values: mean daytime blood pressure <130/90 mm Hg, <135/85 mm Hg, or <140/90 mm Hg. Ninety-five normotensive subjects with similar age and sex distribution were studied as controls. With all threshold levels, left ventricular mass index and wall thicknesses were greater in the sustained hypertensive subjects than in the white coat hypertensive subjects, also when these differences were adjusted for blood pressure readings taken in the office. Relative wall thickness was similar in the two hypertensive groups. All echocardiographic dimensional data were greater in the white coat hypertensive subjects than in the normotensive subjects. Urinary albumin and the prevalence of microalbuminuria were also greater in the sustained hypertensive subjects than in the white coat hypertensive subjects. No significant differences in urinary albumin were found between the white coat hypertensive and the normotensive subjects. These results show that within a population of subjects with stage I hypertension, subjects with white coat hypertension have a smaller degree of hypertensive complications than those with sustained hypertension, irrespective of their blood pressure levels taken in the office. However, in comparison with normotensive subjects, white coat hypertensive subjects seem to be at greater risk. Cardiac involvement seems to precede glomerular damage in the early stage of hypertension.


Assuntos
Ventrículos do Coração/patologia , Hipertensão/patologia , Adulto , Albuminúria , Monitorização Ambulatorial da Pressão Arterial , Feminino , Ventrículos do Coração/anatomia & histologia , Ventrículos do Coração/diagnóstico por imagem , Humanos , Hipertensão/diagnóstico , Hipertensão/fisiopatologia , Hipertensão/psicologia , Masculino , Visita a Consultório Médico , Valores de Referência , Ultrassonografia
15.
Blood Press Monit ; 2(2): 79-88, 1997 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-10234097

RESUMO

According to recent international guidelines the decision on whether to treat young subjects during the early phase of hypertension should be based not only on their office blood pressure but also on their ambulatory blood pressure and whether target organ damage has occurred. Few data on the prevalence of hypertensive complications in young subjects with mild hypertension are available. In the Hypertension and Ambulatory Recording Venetia Study (HARVEST), a multicenter trial conducted in northeast Italy, the percentage of young borderline-to-mild hypertensive subjects with echocardiographic left ventricular hypertrophy was 4.5% and the percentage with concentric remodeling was 4%. Clear differences in cardiac size and geometric adjustment to ambulatory systolic pressure between the two sexes were found. The impact of blood pressure on the walls of the left ventricle and on the left ventricular mass was remarkable in women but weak in men. The assessment of left ventricular systolic function confirmed that many young mild hypertensive subjects have an increased ejective performance. The left ventricular contractility evaluated by midwall measurement was, however, found to be depressed in 9.2% of the HARVEST participants. Their left ventricular diastolic function was similar to that of 50 normotensive controls. The prevalence of microalbuminuria [albumin excretion rate (AER) > 30 mg/24 h) was 6.1%, only slightly higher than that found by other authors among normotensive subjects and much lower than that observed among patients with more severe hypertension. For our stage I hypertensives, however, the AER was correlated to the 24 h blood pressure with high statistical significance, whereas we found no relationship between the AER and left ventricular mass index either for all of the subjects taken together or for the men and women considered separately. The results suggest that renal and cardiac involvement do not occur in parallel during the initial phase of hypertension.

16.
J Viral Hepat ; 4(2): 107-12, 1997 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-9097266

RESUMO

In chronic hepatitis C (HCV) infection, treatment with interferon is associated with a rather low rate of sustained response and many treated patients do not achieve significant benefit. Efforts have therefore been made to identify non-responders as early as possible to avoid unjustified costs and side-effects. We treated 106 cases of HCV with an algorithm based on the results of sequential alanine aminotransferase (ALT) and HCV RNA determinations, using an initial dose of 6 MU thrice weekly for 4 months, and modified the subsequent treatment according to the biochemical and virological profile. Thirty-three out of 48 patients (68.7%) who were HCV RNA negative with normal ALT at 4 months after initiation of treatment were sustained responders when treated for an additional 4-month period with a reduced 3 MU dose, while sustained response was achieved in 12.5% of HCV RNA positive patients treated with a higher dosage and for a more prolonged period of time. Our findings indicate that HCV RNA monitoring during interferon therapy may be useful in modifying of the treatment schedule for the individual patient.


Assuntos
Antivirais/uso terapêutico , Hepacivirus/isolamento & purificação , Hepatite C/virologia , Interferon-alfa/uso terapêutico , Viremia , Adolescente , Adulto , Idoso , Alanina Transaminase/sangue , Doença Crônica , Feminino , Seguimentos , Hepacivirus/genética , Hepatite C/tratamento farmacológico , Humanos , Masculino , Pessoa de Meia-Idade , RNA Viral/análise , Resultado do Tratamento
17.
Recenti Prog Med ; 88(10): 448-51, 1997 Oct.
Artigo em Italiano | MEDLINE | ID: mdl-9471638

RESUMO

UNLABELLED: This paper again affirms the epidemiological significance of alcoholism in the elderly. The results of a study on 99 chronic alcoholic patients sixty-year older have been reported. CONCLUSIONS: The laboratory tests for diagnosis normally used for screening of alcoholism are not enough considered in the elderly. In those patients more parameters have to be evaluated.


Assuntos
Alcoolismo/diagnóstico , Idoso , Idoso de 80 Anos ou mais , Alcoolismo/sangue , Biópsia , Distribuição de Qui-Quadrado , Feminino , Testes Hematológicos/estatística & dados numéricos , Humanos , Modelos Lineares , Fígado/diagnóstico por imagem , Fígado/patologia , Masculino , Pessoa de Meia-Idade , Baço/diagnóstico por imagem , Ultrassonografia
18.
Recenti Prog Med ; 88(12): 562-5, 1997 Dec.
Artigo em Italiano | MEDLINE | ID: mdl-9522596

RESUMO

Patients with alcohol addiction are analyzed after one year from the beginning of therapy. Treatment is carried out by an Anti-addiction Service working in territory, an Hospital medical ward, anti-alcoholic clubs and Hospital voluntary groups. The method is described at first, then the answers of investigated patients, the abstinence period, the attendance to help groups, the use of drugs (disulfiram) and the emerged problems are considered and analyzed. More than one year later, patients with alcohol addiction who have followed this method are still in abstinence and have changed their habit from alcoholic to unalcoholic one, as just they have done for the behaviour and the relationship.


Assuntos
Alcoolismo/terapia , Adulto , Idoso , Dissuasores de Álcool/uso terapêutico , Alcoolismo/tratamento farmacológico , Alcoolismo/reabilitação , Dissulfiram/análogos & derivados , Dissulfiram/uso terapêutico , Educação , Estudos de Avaliação como Assunto , Família , Seguimentos , Humanos , Pessoa de Meia-Idade , Grupos de Autoajuda , Inquéritos e Questionários , Fatores de Tempo
19.
Eur J Epidemiol ; 12(5): 485-91, 1996 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-8905310

RESUMO

UNLABELLED: To study the relationship between plasma renin activity (PRA) and coffee consumption, cigarette smoking, alcohol intake and physical activity habits. SETTING: The multicentre HARVEST trial, involving 17 Hospital Centres in Northeast Italy. SUBJECTS: 351 borderline to mild hypertensive men (mean age +/- SEM 22.7 +/- 0.47 years), never treated for hypertension. INTERVENTIONS: Office and 24-hour blood pressure measurement, supine and standing PRA levels, and urinary catecholamines output. MAIN OUTCOME MEASURES: PRA levels according to coffee intake and physical activity status. RESULTS: Coffee intake showed a major effect on PRA. Supine PRA levels were 40% higher in the subjects abstaining from coffee (n = 94) than in the coffee drinkers and was similar in the moderate (n = 223) and heavy (n = 34) drinkers. A weaker negative association was found between coffee use and PRA on standing. Office and whole-day blood pressure and heart rate, and urinary catecholamines did not differ according to coffee intake. Supine PRA was lower in the subjects performing regular physical activity than in the inactive subjects. Office and whole-day diastolic blood pressure and heart rate, and urinary norepinephrine were lower in the active than in the sedentary men. No relationship was found between PRA measured either in the supine or the upright posture and tobacco or alcohol use. In a multiple linear regression model supine PRA was negatively correlated with age, coffee consumption and physical activity habits. CONCLUSIONS: Chronic coffee intake and physical training showed an inverse relationship with PRA in mild hypertensive men, while tobacco and alcohol use were unrelated to PRA.


Assuntos
Cafeína/farmacologia , Exercício Físico , Hipertensão/sangue , Renina/sangue , Adolescente , Adulto , Consumo de Bebidas Alcoólicas/sangue , Pressão Sanguínea/fisiologia , Humanos , Hipertensão/fisiopatologia , Itália , Masculino , Pessoa de Meia-Idade , Aptidão Física , Análise de Regressão , Fumar
20.
Recenti Prog Med ; 87(9): 412-5, 1996 Sep.
Artigo em Italiano | MEDLINE | ID: mdl-9053955

RESUMO

The Authors studied 99 over 60 years old alcohol abusers, in view of their enrollment in a programme of rehabilitation. They observed that the treatment was effective, but less than it was in younger alcoholics; however, if subjects are properly selected, the efficacy is similar. In conclusion, the Authors reaffirm the importance, in spite of the difficulty, of a precocious diagnosis of alcoholism in the elderly.


Assuntos
Alcoolismo/reabilitação , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
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