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1.
Liver Int ; 44(1): 72-82, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-37718730

RESUMO

BACKGROUND AND AIMS: The PREDICT study recently showed that acutely decompensated (AD) patients with cirrhosis can present three different clinical phenotypes in the 90 days after admission: (1) pre-ACLF, developing acute-on-chronic liver failure (ACLF); (2) unstable decompensated cirrhosis (UDC), being re-admitted for AD without ACLF and (3) stable decompensated cirrhosis (SDC), not presenting readmission or ACLF. This study aimed to externally validate the existence of these three distinct trajectories and to identify predictors for the occurrence of each trajectory. METHODS: Baseline data, 3-month ACLF and readmission incidence and 1-year survival were analysed in a prospective cohort of patients admitted for AD. A multinomial multivariable model was used to evaluate the association between baseline features and clinical trajectories. RESULTS: Of the 311 patients enrolled, 55% met the criteria for SDC, 18% for UDC and 27% for pre-ACLF, presenting a significantly different 1-year mortality: pre-ACLF 65%, UDC 46%, SDC 21% (p < .001). The presence of hepatic encephalopathy (HE) was associated with UDC (p = .043), while the absence of ascites to SDC (p = .017). Among laboratory parameters, an increase in MELD-Na (p = .001) and C-reactive protein (p = .009) and a decrease in haemoglobin (p = .004) and albumin (p = .008) levels were associated with pre-ACLF. CONCLUSION: The present study confirms that AD patients have three different clinical trajectories with different mortality rates. Besides the severity of cirrhosis, the association with C-reactive protein supports the predominant role of systemic inflammation in ACLF pathophysiology. Finally, HE is associated with the UDC phenotype highlighting the need for better management of this complication after discharge.


Assuntos
Insuficiência Hepática Crônica Agudizada , Encefalopatia Hepática , Cirrose Hepática , Humanos , Insuficiência Hepática Crônica Agudizada/complicações , Proteína C-Reativa , Encefalopatia Hepática/complicações , Inflamação , Prognóstico , Estudos Prospectivos
2.
Liver Int ; 2024 Jun 27.
Artigo em Inglês | MEDLINE | ID: mdl-38934515

RESUMO

Type-2 diabetes mellitus is a frequent comorbidity of cirrhosis independently associated with cirrhosis-related complications and mortality. This post hoc analysis of the ANSWER trial database assessed the effects of long-term human albumin (HA) administration on top of the standard medical treatment (SMT) on the clinical outcomes of a subgroup of 85 outpatients with liver cirrhosis, uncomplicated ascites and insulin-treated diabetes mellitus type 2 (ITDM). Compared to patients in the SMT arm, the SMT + HA group showed a better overall survival (86% vs. 57%, p = .016) and lower incidence rates of paracenteses, overt hepatic encephalopathy, bacterial infections, renal dysfunction and electrolyte disorders. Hospital admissions did not differ between the two arms, but the number of days spent in hospital was lower in the SMT + HA group. In conclusion, in a subgroup of ITDM outpatients with decompensated cirrhosis and ascites, long-term HA administration was associated with better survival and a lower incidence of cirrhosis-related complications.

3.
Arch Gynecol Obstet ; 309(4): 1575-1583, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38253692

RESUMO

PURPOSE: Breast cancer survivors (BCS) suffer severe vulvo-vaginal atrophy (VVA) and some of the most effective therapies are contraindicated. In literature we have no data about the non-ablative CO2 laser on these women. The aim of this study was to examine its efficacy, safety and acceptability in BCS. MATERIALS AND METHODS: The enrolled women underwent 3 sessions of laser therapy (t0, t1, t2) and a one-month follow up examination (t3). At each time point we measured objective signs of VVA via VHI (Vaginal Health Index) and VuHI (Vulvar Health Index) and subjective parameters (Dryness, Burning, Itching, Dysuria) via visual analog scales (VAS). In sexually active women we evaluated the sexual function with FSFI (Female Sexual Function Index), FSDS (Female Sexual Distress Score) scores and MENQOL (menopause quality of life questionnaire). RESULTS: We enrolled 26 BCS. The mean VHI, VuVHI, dryness and burning VAS scores improved significantly and this improvement was not influenced by the initial VVA grade. MENQOL sexual domain, Lubrication, Orgasm and Pain domains and FSFI total score improved significantly, while Desire, Arousal and Satisfaction domains of FSFI and FSDS did not. At t0 women using Aromatase Inhibitors suffered more severe vaginal dryness than women using Tamoxifen or no therapy, but the three subgroups improved without differences. No adverse event and minimum discomfort were reported. CONCLUSIONS: The non-ablative CO2 laser is a safe and effective treatment of VVA and has positive effects on sexual function in BCS regardless the use of adjuvant therapies and the initial grade of VVA.


Assuntos
Neoplasias da Mama , Lasers de Gás , Doenças Vaginais , Feminino , Humanos , Dióxido de Carbono , Neoplasias da Mama/complicações , Neoplasias da Mama/cirurgia , Neoplasias da Mama/patologia , Qualidade de Vida , Pós-Menopausa , Doenças Vaginais/etiologia , Doenças Vaginais/cirurgia , Doenças Vaginais/patologia , Vagina/cirurgia , Vagina/patologia , Resultado do Tratamento , Atrofia/patologia , Lasers de Gás/efeitos adversos
4.
Int J Mol Sci ; 25(6)2024 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-38542146

RESUMO

Diabetic kidney disease (DKD) is a major cause of morbidity and mortality in individuals with type 2 diabetes mellitus (T2DM). The aim of this study was to investigate whether albumin structural alterations correlate with DKD severity and evaluate whether native and reduced albumin concentrations could complement the diagnosis of DKD. To this end, one hundred and seventeen T2DM patients without (n = 42) and with (n = 75) DKD (DKD I-III upon KDIGO classification) were evaluated; the total albumin concentration (tHA) was quantified by a bromocresol green assay, while structural alterations were profiled via liquid chromatography-high-resolution mass spectrometry (LC-HRMS). The concentrations of native albumin (eHA, effective albumin) and reduced albumin (rHA) were subsequently assessed. The HRMS analyses revealed a reduced relative amount of native albumin in DKD patients along with an increased abundance of altered forms, especially those bearing oxidative modifications. Accordingly, both eHA and rHA values varied during the stages of progressive renal failure, and these alterations were dose-dependently correlated with renal dysfunction. A ROC curve analysis revealed a significantly greater sensitivity and specificity of eHA and rHA than of tHA for diagnosing DKD. Importantly, according to the multivariate logistic regression analysis, the eHA was identified as an independent predictor of DKD.


Assuntos
Diabetes Mellitus Tipo 2 , Nefropatias Diabéticas , Humanos , Diabetes Mellitus Tipo 2/complicações , Nefropatias Diabéticas/complicações , Taxa de Filtração Glomerular , Sensibilidade e Especificidade , Rim
5.
Am J Gastroenterol ; 118(1): 168-173, 2023 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-36087106

RESUMO

INTRODUCTION: We assessed the impact of long-term albumin administration to hyponatremic patients with ascites enrolled in the ANSWER trial. METHODS: The normalization rate of baseline hyponatremia and the 18-month incidence rate of at least moderate hyponatremia were evaluated. RESULTS: The hyponatremia normalization rate was higher with albumin than with standard medical treatment (45% vs 28%, P = 0.042 at 1 month). Long-term albumin ensured a lower incidence of at least moderate hyponatremia than standard medical treatment (incidence rate ratio: 0.245 [CI 0.167-0.359], P < 0.001). DISCUSSION: Long-term albumin administration improves hyponatremia and reduces episodes of at least moderate hyponatremia in outpatients with cirrhosis and ascites.


Assuntos
Albuminas , Ascite , Hiponatremia , Cirrose Hepática , Humanos , Albuminas/administração & dosagem , Ascite/complicações , Hiponatremia/etiologia , Hiponatremia/prevenção & controle , Hiponatremia/terapia , Cirrose Hepática/complicações
6.
Hepatology ; 74(4): 2058-2073, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-33710623

RESUMO

BACKGROUND AND AIMS: Circulating albumin in cirrhosis can be dysfunctional because of accumulating structural damages, leading to the concept of effective albumin concentration (eAlb), referring to the albumin portion presenting structural and functional integrity. We aimed to estimate eAlb in patients with decompensated cirrhosis and analyze its relationships with albumin function and clinical outcomes as compared to total albumin concentration (tAlb). APPROACH AND RESULTS: We evaluated 319 patients with cirrhosis hospitalized for acute decompensation (AD) with and without acute-on-chronic liver failure (ACLF) and 18 age- and sex-comparable outpatients with compensated cirrhosis. tAlb was quantified by standard assay, whereas eAlb was estimated combining liquid chromatography/electrospray ionization/mass spectrometry and standard methods. Albumin binding and detoxification efficiency were evaluated by electron paramagnetic resonance analysis. Circulating albumin in patients with decompensated cirrhosis displayed multiple structural abnormalities, with reversible oxidation and glycation being the most frequent. As a result, eAlb progressively declined with the worsening of cirrhosis and was superior to tAlb in stratifying patients between compensated cirrhosis, AD, and ACLF, as well as patients with and without complications. Moreover, eAlb, but not tAlb, was closely associated with binding capacities in ACLF. Finally, eAlb at admission predicted the occurrence of ACLF within 30 days and mortality at 90 days better than tAlb. CONCLUSIONS: This large, observational study provides the evidence in patients with decompensated cirrhosis that eAlb can be quantified and differentiated from tAlb routinely measured in clinical practice. As compared to tAlb, eAlb is more closely associated with disease severity and albumin dysfunction and carries a greater prognostic power. These results prompt future research assessing eAlb as a biomarker for predicting prognosis and treatment response.


Assuntos
Insuficiência Hepática Crônica Agudizada , Cirrose Hepática , Prognóstico , Albumina Sérica Humana/análise , Insuficiência Hepática Crônica Agudizada/sangue , Insuficiência Hepática Crônica Agudizada/diagnóstico , Insuficiência Hepática Crônica Agudizada/mortalidade , Biomarcadores/análise , Biomarcadores/sangue , Cromatografia Líquida/métodos , Feminino , Humanos , Itália/epidemiologia , Estimativa de Kaplan-Meier , Cirrose Hepática/sangue , Cirrose Hepática/etiologia , Cirrose Hepática/fisiopatologia , Masculino , Pessoa de Meia-Idade , Ligação Proteica , Produtos Finais de Degradação Proteica , Elementos Estruturais de Proteínas , Reprodutibilidade dos Testes , Índice de Gravidade de Doença , Espectrometria de Massas por Ionização por Electrospray/métodos
7.
J Sex Med ; 19(5): 761-770, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-35370104

RESUMO

BACKGROUND: Among treatments for vulvo-vaginal atrophy (VVA), there is a new kind of energy-based device, the non-ablative CO2 laser. AIM: This study aimed to assess the efficacy and safety of the non-ablative CO2 laser in menopausal women with VVA as a monotherapy or in association with vaginal estriol or moisturizer. METHODS: Seventy-five women with VVA received laser treatment (Laser group), laser plus estriol gel (Laser+E) or laser plus moisturizers (Laser+M). The study protocol consisted of 3 monthly laser sessions (t0, t1, t2) and a gynecological examination at baseline and 1 month after last laser treatment (t3). Objective measures included VHI (Vaginal Health Index) and VuHI (Vulvar Health Index); subjective symptoms of VVA (Dryness, Burning, Itching, Dysuria) evaluated via visual analog scales, sexual function evaluated by FSFI (Female Sexual Function Index), FSDS (Female Sexual Distress Score) and MENQOL (Mopause-specific Quality Of Life). Adverse events and discomfort encountered during the procedure were also assessed. OUTCOMES: Primary outcomes were the evaluation of VHI and VuHI and secondary outcomes were changes in VVA symptoms (VAS), sexual function (MENQOL, FSFI, FSDS) and discomfort during the procedure. RESULTS: Seventy-five women (25 in Laser, 25 in Laser+E and 25 in Laser+M group) completed the study. At t3, mean VHI, VuHI, dryness, burning and itching VAS scores improved significantly with no differences between the groups. The lubrication domain of FSFI improved significantly only in the Laser+M group, while the pain domain improved significantly in all women with no differences between the groups. FSFI and FSDS overall scores and MENQOL sexual domain improved in all women with no significant difference between the groups. The mean score of the pain during the procedure was low at t0 and did not change throughout the study. CLINICAL IMPLICATIONS: This study extends knowledge concerning the effectiveness of a new non-ablative CO2 laser in post-menopausal women with VVA. STRENGTHS & LIMITATIONS: This is one of the first studies on this kind of laser and is the first to compare the effectiveness of laser treatment alone or in combination with vaginal estriol or moisturizers. Parameters of VVA and sexual function were evaluated using validated tools. Study limitations include short follow-up time, the limited number of participants and the absence of a sham-controlled group. CONCLUSION: Non-ablative CO2 laser seems to be an effective treatment for VVA in menopausal women. Our preliminary data shows that it can be effective as monotherapy or with adjuvant treatments. Alvisi S, Lami A, Baldassarre M, et al. Short-Term Efficacy and Safety of Non-Ablative Laser Treatment Alone or with Estriol or Moisturizers in Postmenopausal Women with Vulvovaginal Atrophy. J Sex Med 2022;19:761-770.


Assuntos
Pós-Menopausa , Doenças Vaginais , Atrofia/patologia , Dióxido de Carbono/uso terapêutico , Estriol/uso terapêutico , Feminino , Humanos , Dor , Prurido/patologia , Qualidade de Vida , Resultado do Tratamento , Vagina/patologia , Vagina/cirurgia , Doenças Vaginais/tratamento farmacológico , Vulva/patologia
8.
J Hepatol ; 74(2): 340-349, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-32853747

RESUMO

BACKGROUND & AIMS: The ANSWER study reported that long-term albumin administration in patients with cirrhosis and uncomplicated ascites improves survival. During treatment, serum albumin increased within a month and remained stable thereafter. In this post hoc analysis, we aimed to determine whether on-treatment serum albumin levels could guide therapy. METHODS: Logistic regression was used to assess the association between baseline serum albumin and mortality, as well as to determine on-treatment factors associated with mortality and to predict the achievement of a given on-treatment serum albumin level. Survival was assessed by Kaplan-Meier estimates and second-order polynomial regression. Patients whose on-treatment serum albumin remained below normal were compared with a subset of patients from the control arm matched by principal score. RESULTS: Baseline serum albumin was closely associated with 18-month mortality in untreated patients; albumin treatment almost effaced this relationship. On-treatment serum albumin and MELD-Na at month 1 were the sole independent variables associated with mortality. Second-order polynomial regression revealed that survival improved in parallel with increased 1-month on-treatment serum albumin. Kaplan-Meier estimations showed that any value of 1-month on-treatment serum albumin (0.1 g/dl intervals) in the range 2.5-4.5 g/dl discriminated patient survival. In the normal range of serum albumin, the best discriminant value was 4.0 g/dl. Compared to untreated patients, survival even improved in patients whose on-treatment serum albumin remained below normal. CONCLUSION: Baseline serum albumin per se should not guide the decision to start albumin therapy. Conversely, 1-month on-treatment serum albumin levels are strongly associated with outcomes and could guide the use of albumin - 4.0 g/dl being the target threshold. However, even patients whose serum albumin remains below normal benefit from long-term albumin administration. LAY SUMMARY: The ANSWER study has shown that long-term albumin administration improves survival and prevents the occurrence of major complications in patients with cirrhosis and ascites. This study shows that the achievement of these beneficial effects is related to a significant increase in serum albumin concentration. Even though the best results follow the achievement of a serum albumin concentration of 4 g/dl, a survival benefit is also achieved in patients who fail to normalise serum albumin.


Assuntos
Ascite , Cirrose Hepática , Assistência de Longa Duração/métodos , Albumina Sérica Humana/administração & dosagem , Albumina Sérica/análise , Ascite/etiologia , Ascite/terapia , Produtos Biológicos/administração & dosagem , Biomarcadores Farmacológicos/análise , Monitoramento de Medicamentos/métodos , Feminino , Humanos , Análise de Intenção de Tratamento , Cirrose Hepática/sangue , Cirrose Hepática/complicações , Cirrose Hepática/mortalidade , Cirrose Hepática/terapia , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Análise de Sobrevida , Resultado do Tratamento
9.
J Hepatol ; 72(4): 688-701, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-31778751

RESUMO

BACKGROUND & AIMS: Acute-on-chronic liver failure (ACLF), which develops in patients with cirrhosis, is characterized by intense systemic inflammation and organ failure(s). Because systemic inflammation is energetically expensive, its metabolic costs may result in organ dysfunction/failure. Therefore, we aimed to analyze the blood metabolome in patients with cirrhosis, with and without ACLF. METHODS: We performed untargeted metabolomics using liquid chromatography coupled to high-resolution mass spectrometry in serum from 650 patients with AD (acute decompensation of cirrhosis, without ACLF), 181 with ACLF, 43 with compensated cirrhosis, and 29 healthy individuals. RESULTS: Of the 137 annotated metabolites identified, 100 were increased in patients with ACLF of any grade, relative to those with AD, and 38 comprised a distinctive blood metabolite fingerprint for ACLF. Among patients with ACLF, the intensity of the fingerprint increased across ACLF grades, and was similar in patients with kidney failure and in those without, indicating that the fingerprint reflected not only decreased kidney excretion but also altered cell metabolism. The higher the ACLF-associated fingerprint intensity, the higher the plasma levels of inflammatory markers, tumor necrosis factor α, soluble CD206, and soluble CD163. ACLF was characterized by intense proteolysis and lipolysis; amino acid catabolism; extra-mitochondrial glucose metabolism through glycolysis, pentose phosphate, and D-glucuronate pathways; depressed mitochondrial ATP-producing fatty acid ß-oxidation; and extra-mitochondrial amino acid metabolism giving rise to metabotoxins. CONCLUSIONS: In ACLF, intense systemic inflammation is associated with blood metabolite accumulation and profound alterations in major metabolic pathways, in particular inhibition of mitochondrial energy production, which may contribute to the development of organ failures. LAY SUMMARY: Acute-on-chronic liver failure (ACLF), which develops in patients with cirrhosis, is characterized by intense systemic inflammation and organ failure(s). Because systemic inflammation is energetically expensive, its metabolic costs may result in organ dysfunction/failure. We identified a 38-metabolite blood fingerprint specific for ACLF that revealed mitochondrial dysfunction in peripheral organs. This may contribute to organ failures.


Assuntos
Insuficiência Hepática Crônica Agudizada/sangue , Insuficiência Hepática Crônica Agudizada/complicações , Glicólise , Cirrose Hepática/sangue , Cirrose Hepática/complicações , Metaboloma , Metabolômica/métodos , Mitocôndrias/metabolismo , Adulto , Idoso , Biomarcadores/sangue , Estudos de Casos e Controles , Feminino , Humanos , Inflamação/metabolismo , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Índice de Gravidade de Doença
10.
Clin Infect Dis ; 69(10): 1731-1739, 2019 10 30.
Artigo em Inglês | MEDLINE | ID: mdl-30649218

RESUMO

BACKGROUND: We analyzed the impact of continuous/extended infusion (C/EI) vs intermittent infusion of piperacillin-tazobactam (TZP) and carbapenems on 30-day mortality of patients with liver cirrhosis and bloodstream infection (BSI). METHODS: The BICRHOME study was a prospective, multicenter study that enrolled 312 cirrhotic patients with BSI. In this secondary analysis, we selected patients receiving TZP or carbapenems as adequate empirical treatment. The 30-day mortality of patients receiving C/EI or intermittent infusion of TZP or carbapenems was assessed with Kaplan-Meier curves, Cox-regression model, and estimation of the average treatment effect (ATE) using propensity score matching. RESULTS: Overall, 119 patients received TZP or carbapenems as empirical treatment. Patients who received C/EI had a significantly lower mortality rate (16% vs 36%, P = .047). In a Cox-regression model, the administration of C/EI was associated with a significantly lower mortality (hazard ratio [HR], 0.41; 95% confidence interval [CI], 0.11-0.936; P = .04) when adjusted for severity of illness and an ATE of 25.6% reduction in 30-day mortality risk (95% CI, 18.9-32.3; P < .0001) estimated with propensity score matching. A significant reduction in 30-day mortality was also observed in the subgroups of patients with sepsis (HR, 0.21; 95% CI, 0.06-0.74), acute-on-chronic liver failure (HR, 0.29; 95% CI, 0.03-0.99), and a model for end-stage liver disease score ≥25 (HR, 0.26; 95% CI, 0.08-0.92). At competing risk analysis, C/EI of beta-lactams was associated with significantly higher rates of hospital discharge (subdistribution hazard [95% CI], 1.62 [1.06-2.47]). CONCLUSIONS: C/EI of beta-lactams in cirrhotic patients with BSI may improve outcomes and facilitate earlier discharge.


Assuntos
Antibacterianos/administração & dosagem , Bacteriemia/tratamento farmacológico , Cirrose Hepática/complicações , beta-Lactamas/administração & dosagem , Idoso , Bacteriemia/microbiologia , Feminino , Humanos , Infusões Intravenosas , Cirrose Hepática/microbiologia , Masculino , Pessoa de Meia-Idade , Piperacilina/administração & dosagem , Estudos Prospectivos , Estudos Retrospectivos , Tazobactam/administração & dosagem , Resultado do Tratamento
11.
Lancet ; 391(10138): 2417-2429, 2018 06 16.
Artigo em Inglês | MEDLINE | ID: mdl-29861076

RESUMO

BACKGROUND: Evidence is scarce on the efficacy of long-term human albumin (HA) administration in patients with decompensated cirrhosis. The human Albumin for the treatmeNt of aScites in patients With hEpatic ciRrhosis (ANSWER) study was designed to clarify this issue. METHODS: We did an investigator-initiated multicentre randomised, parallel, open-label, pragmatic trial in 33 academic and non-academic Italian hospitals. We randomly assigned patients with cirrhosis and uncomplicated ascites who were treated with anti-aldosteronic drugs (≥200 mg/day) and furosemide (≥25 mg/day) to receive either standard medical treatment (SMT) or SMT plus HA (40 g twice weekly for 2 weeks, and then 40 g weekly) for up to 18 months. The primary endpoint was 18-month mortality, evaluated as difference of events and analysis of survival time in patients included in the modified intention-to-treat and per-protocol populations. This study is registered with EudraCT, number 2008-000625-19, and ClinicalTrials.gov, number NCT01288794. FINDINGS: From April 2, 2011, to May 27, 2015, 440 patients were randomly assigned and 431 were included in the modified intention-to-treat analysis. 38 of 218 patients died in the SMT plus HA group and 46 of 213 in the SMT group. Overall 18-month survival was significantly higher in the SMT plus HA than in the SMT group (Kaplan-Meier estimates 77% vs 66%; p=0·028), resulting in a 38% reduction in the mortality hazard ratio (0·62 [95% CI 0·40-0·95]). 46 (22%) patients in the SMT group and 49 (22%) in the SMT plus HA group had grade 3-4 non-liver related adverse events. INTERPRETATION: In this trial, long-term HA administration prolongs overall survival and might act as a disease modifying treatment in patients with decompensated cirrhosis. FUNDING: Italian Medicine Agency.


Assuntos
Albuminas/uso terapêutico , Ascite/terapia , Cirrose Hepática/tratamento farmacológico , Idoso , Ascite/etiologia , Diuréticos/administração & dosagem , Diuréticos/efeitos adversos , Quimioterapia Combinada , Feminino , Furosemida/administração & dosagem , Furosemida/efeitos adversos , Humanos , Hiperpotassemia/induzido quimicamente , Hiponatremia/induzido quimicamente , Estimativa de Kaplan-Meier , Cirrose Hepática/complicações , Cirrose Hepática/fisiopatologia , Masculino , Pessoa de Meia-Idade , Antagonistas de Receptores de Mineralocorticoides/uso terapêutico , Paracentese , Qualidade de Vida , Anos de Vida Ajustados por Qualidade de Vida , Taxa de Sobrevida , Fatores de Tempo
12.
Phys Chem Chem Phys ; 21(16): 8587-8597, 2019 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-30964131

RESUMO

The internal structure of amyloid-ß (Aß) oligomers was investigated with isotope-edited Fourier transform infrared spectroscopy. Homo-oligomers of Aß40 and Aß42 were prepared from unlabeled and 13C, 15N-labeled monomeric Aß and from mixtures of these. For the unlabeled peptides, two main bands were observed in 2H2O at 1685 and 1622 cm-1 for Aß40 and at 1685 and 1626 cm-1 for Aß42. These band positions indicate that the number of strands per sheet is at least four. The obtained experimental amide I spectra were simulated using a number of structural models (antiparallel ß-sheets, ß-barrels and a dodecamer structure). According to experiments and calculations, the main 13C-band shifts down at increasing molar ratio of labeled peptides. This shift occurs when vibrational coupling becomes possible between 13C-amide groups in close-by strands. It is small, when intervening 12C-strands increase the distance between 13C-strands; it is large, when many neighboring strands are labeled. The shift depends on the internal structure of the peptides within the oligomers, i.e. on the building block that each peptide molecule contributes to the ß-sheets of the oligomers. The shift is largest, when individual peptides contribute just a single strand surrounded by strands from other peptide molecules. It is smaller when each molecule forms two or three adjacent strands. As indicated by a comparison between experiment and computation, the number of adjacent ß-strands per peptide molecule is two for Aß40 oligomers and two or more for Aß42 oligomers. Our results are well explained by regular, antiparallel ß-sheets or ß-barrels.


Assuntos
Peptídeos beta-Amiloides/química , Fragmentos de Peptídeos/química , Humanos , Modelos Moleculares , Conformação Proteica em Folha beta , Espectroscopia de Infravermelho com Transformada de Fourier/métodos
13.
Medicina (Kaunas) ; 55(10)2019 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-31547180

RESUMO

The aim of this review is to provide an overview of genitourinary health in peri- and postmenopause, particularly of vulvovaginal atrophy (VVA), which is part of genitourinary syndrome (GSM). This condition has a high prevalence among post-menopausal women and negatively affects a woman's quality of life. Epidemiology, signs, symptoms, diagnostic criteria of VVA and target treatments for restoring vaginal health are discussed in light of the most recent literature. Issues related to this condition in menopausal women are under-diagnosed, lack objective diagnostic criteria, and consequently under-treated. Over the years, many treatments have been developed but their long-term effectiveness and safety have yet to be clearly defined. Patients are often dissatisfied and stop treatment, suggesting the need for a more personalized and tailored approach to achieve better compliance and thereby effectiveness. The aim of this paper is to provide an overview of the most recent literature on VVA in order to help the gynecologist in the management of this condition.


Assuntos
Emolientes/administração & dosagem , Terapia de Reposição Hormonal , Lubrificantes/administração & dosagem , Perimenopausa/fisiologia , Pós-Menopausa/fisiologia , Vagina/patologia , Doenças Vaginais/terapia , Administração Intravaginal , Atrofia/epidemiologia , Atrofia/terapia , Feminino , Humanos , Terapia a Laser , Vagina/fisiopatologia , Doenças Vaginais/diagnóstico , Doenças Vaginais/epidemiologia
14.
Gut ; 67(10): 1892-1899, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-28860348

RESUMO

INTRODUCTION: Patients with cirrhosis have a high risk of sepsis, which confers a poor prognosis. The systemic inflammatory response syndrome (SIRS) criteria have several limitations in cirrhosis. Recently, new criteria for sepsis (Sepsis-3) have been suggested in the general population (increase of Sequential Organ Failure Assessment (SOFA) ≥2 points from baseline). Outside the intensive care unit (ICU), the quick SOFA (qSOFA (at least two among alteration in mental status, systolic blood pressure ≤100 mm Hg or respiratory rate ≥22/min)) was suggested to screen for sepsis. These criteria have never been evaluated in patients with cirrhosis. The aim of the study was to assess the ability of Sepsis-3 criteria in predicting in-hospital mortality in patients with cirrhosis and bacterial/fungal infections. METHODS: 259 consecutive patients with cirrhosis and bacterial/fungal infections were prospectively included. Demographic, laboratory and microbiological data were collected at diagnosis of infection. Baseline SOFA was assessed using preadmission data. Patients were followed up until death, liver transplantation or discharge. Findings were externally validated (197 patients). RESULTS: Sepsis-3 and qSOFA had significantly greater discrimination for in-hospital mortality (area under the receiver operating characteristic (AUROC)=0.784 and 0.732, respectively) than SIRS (AUROC=0.606) (p<0.01 for both). Similar results were observed in the validation cohort. Sepsis-3 (subdistribution HR (sHR)=5.47; p=0.006), qSOFA (sHR=1.99; p=0.020), Chronic Liver Failure Consortium Acute Decompensation score (sHR=1.05; p=0.001) and C reactive protein (sHR=1.01;p=0.034) were found to be independent predictors of in-hospital mortality. Patients with Sepsis-3 had higher incidence of acute-on-chronic liver failure, septic shock and transfer to ICU than those without Sepsis-3. CONCLUSIONS: Sepsis-3 criteria are more accurate than SIRS criteria in predicting the severity of infections in patients with cirrhosis. qSOFA is a useful bedside tool to assess risk for worse outcomes in these patients. Patients with Sepsis-3 and positive qSOFA deserve more intensive management and strict surveillance.


Assuntos
Infecções Bacterianas , Cirrose Hepática , Escores de Disfunção Orgânica , Sepse , Síndrome de Resposta Inflamatória Sistêmica , Idoso , Área Sob a Curva , Infecções Bacterianas/complicações , Infecções Bacterianas/epidemiologia , Confiabilidade dos Dados , Feminino , Mortalidade Hospitalar , Humanos , Itália/epidemiologia , Cirrose Hepática/complicações , Cirrose Hepática/epidemiologia , Masculino , Entrevista Psiquiátrica Padronizada , Pessoa de Meia-Idade , Exame Físico/métodos , Prognóstico , Reprodutibilidade dos Testes , Sepse/diagnóstico , Sepse/etiologia , Sepse/mortalidade , Síndrome de Resposta Inflamatória Sistêmica/diagnóstico , Síndrome de Resposta Inflamatória Sistêmica/etiologia , Síndrome de Resposta Inflamatória Sistêmica/mortalidade
15.
Clin Endocrinol (Oxf) ; 89(6): 878-886, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30025172

RESUMO

OBJECTIVE: To retrospectively evaluate and compare safety and efficacy of short and long-acting testosterone (T) parenteral formulations over 5 years in transmen. DESIGN AND METHODS: Fifty transmen between 21 and 42 years of age were enrolled. Twenty-five received T undecanoate 1000 mg IM (weeks 0 and 6 then every 12-16 weeks), and 25 received T enanthate 250 mg IM (every 3-4 weeks). Hormonal and biochemical parameters, anthropometric characteristics and blood pressure were assessed at baseline and then every 12 months. Body composition was evaluated at baseline and then after 1, 3 and 5 years of T treatment. Global satisfaction was assessed at baseline and after 1 and 5 years. RESULTS: Both T formulations led to amenorrhoea in all subjects within 1 year of T administration. Both T treatments led to a similar increase in haemoglobin and haematocrit which always remained within the physiological range. T administration was associated with an increase in total cholesterol, low-density lipoprotein cholesterol and triglycerides and a slight reduction in high-density lipoprotein cholesterol. Coagulative and glucidic profiles and blood pressure did not change significantly in either group. Body weight and BMI showed a slight but not significant increase in both groups, while lean mass rose significantly in both groups. Global satisfaction was increased at years 1 and 5 in both groups. CONCLUSIONS: Preliminary results from this pilot study suggest that administration of either TU or TE for 5 years in young transmen is both effective and safe. Our study presents the longest follow-up published so far reporting no adverse events and these data are consistent with previous reports with a shorter follow-up.


Assuntos
Testosterona/análogos & derivados , Adulto , Antropometria , Pressão Sanguínea/efeitos dos fármacos , Castração/métodos , Humanos , Masculino , Estudos Retrospectivos , Testosterona/uso terapêutico , Pessoas Transgênero , Adulto Jovem
16.
J Sex Med ; 15(12): 1776-1784, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30446472

RESUMO

INTRODUCTION: Vulvo-vaginal atrophy affects the daily lives of most post-menopausal women. We know that ospemifene intake can induce vaginal epithelial improvements within a few weeks; however, direct evidence of the effects of ospemifene on the human vulva and on connective tissue of both the vagina and vulva are lacking. AIM: To evaluate the changes induced by ospemifene on epithelium thickness, glycogen content proliferation index, collagen content, and type I/III collagen ratio in vulvar and vaginal tissue of post-menopausal women. METHODS: 20 women who attended our gynecologic clinic for planned surgery were recruited for the study. 11 subjects were taking ospemifene at the time of inclusion, and 9 subjects who were not taking ospemifene were selected as control group. Vaginal and vulvar biopsies were taken during surgery. Histological features and glycogen content were evaluated by standard hematoxylin-eosin and periodic acid-Schiff staining, total collagen and collagen type I/III ratio were evaluated by hydroxyproline assay and Sirius red staining, while the expression of Ki67 was evaluated by immunohistochemistry. MAIN OUTCOME MEASURE: We analyzed histological features of the epithelial and stromal layer of the vaginal and vulvar vestibule mucosa. RESULTS: Vaginal and vulvar biopsies from women taking ospemifene showed an increased epithelium thickness, glycogen content, and proliferation index compared with the control group. Collagen content was also higher in women taking ospemifene, while an increased ratio between type I and III collagen fibers was found only at vaginal level. CLINICAL IMPLICATIONS: Our study shows that the effectiveness of ospemifene on vaginal tissue also extends to the vulvar vestibule. STRENGTH & LIMITATIONS: This study provides direct evidence of the impact of ospemifene on vaginal and vulvar tissue. A specifically designed longitudinal study may further support our findings. CONCLUSION: Ospemifene intake is associated with a marked improvement of various morphological and physiological features of both vaginal and vulvar vestibule epithelium, including the collagen content of the tissues. Alvisi S, Baldassarre M, Gava G, et al. Structure of Epithelial and Stromal Compartments of Vulvar and Vaginal Tissue From Women With Vulvo-Vaginal Atrophy Taking Ospemifene. J Sex Med 2018;15:1776-1784.


Assuntos
Moduladores Seletivos de Receptor Estrogênico/uso terapêutico , Tamoxifeno/análogos & derivados , Doenças Vaginais/tratamento farmacológico , Doenças da Vulva/tratamento farmacológico , Atrofia/patologia , Tecido Conjuntivo/metabolismo , Epitélio/metabolismo , Feminino , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade , Tamoxifeno/uso terapêutico , Resultado do Tratamento , Doenças Vaginais/metabolismo , Doenças Vaginais/patologia , Vulva/patologia , Doenças da Vulva/metabolismo , Doenças da Vulva/patologia
17.
Cytotherapy ; 19(12): 1447-1461, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-28917627

RESUMO

BACKGROUND AIMS: Growing evidence supports the therapeutic potential of bone marrow (BM)-derived stem/progenitor cells for end-stage liver disease (ESLD). We recently demonstrated that CD133+ stem/progenitor cell (SPC) reinfusion in patients with ESLD is feasible and safe and improve, albeit transiently, liver function. However, the mechanism(s) through which BM-derived SPCs may improve liver function are not fully elucidated. METHODS: Here, we characterized the circulating SPCs compartment of patients with ESLD undergoing CD133+ cell therapy. Next, we set up an in vitro model mimicking SPCs/liver microenvironment interaction by culturing granulocyte colony-stimulating factor (G-CSF)-mobilized CD133+and LX-2 hepatic stellate cells. RESULTS: We found that patients with ESLD show normal basal levels of circulating hematopoietic and endothelial progenitors with impaired clonogenic ability. After G-CSF treatment, patients with ESLD were capable to mobilize significant numbers of functional multipotent SPCs, and interestingly, this was associated with increased levels of selected cytokines potentially facilitating SPC function. Co-culture experiments showed, at the molecular and functional levels, the bi-directional cross-talk between CD133+ SPCs and human hepatic stellate cells LX-2. Human hepatic stellate cells LX-2 showed reduced activation and fibrotic potential. In turn, hepatic stellate cells enhanced the proliferation and survival of CD133+ SPCs as well as their endothelial and hematopoietic function while promoting an anti-inflammatory profile. DISCUSSION: We demonstrated that the interaction between CD133+ SPCs from patients with ESLD and hepatic stellate cells induces significant functional changes in both cellular types that may be instrumental for the improvement of liver function in cirrhotic patients undergoing cell therapy.


Assuntos
Antígeno AC133/metabolismo , Doença Hepática Terminal/terapia , Células Estreladas do Fígado/citologia , Fígado/citologia , Transplante de Células-Tronco/métodos , Células-Tronco/metabolismo , Proliferação de Células , Técnicas de Cocultura , Doença Hepática Terminal/patologia , Fator Estimulador de Colônias de Granulócitos/metabolismo , Fator Estimulador de Colônias de Granulócitos/farmacologia , Células Estreladas do Fígado/fisiologia , Humanos , Fígado/metabolismo , Fígado/patologia , Neovascularização Fisiológica , Células-Tronco/citologia , Células Estromais/efeitos dos fármacos , Células Estromais/metabolismo
18.
Gynecol Endocrinol ; 33(12): 946-950, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28562130

RESUMO

Ospemifene is a selective estrogen receptor modulator used for the treatment of vulvo-vaginal atrophy (VVA) in post-menopausal women. No direct evidence of its effects on histological features of the human vagina has been reported. To evaluate the effects of ospemifene on histological parameters, glycogen content, proliferation, and estrogen receptor α expression (ERα) of vaginal epithelium in post-menopausal women. Thirty-two post-menopausal women undergoing surgical procedures were enrolled. Sixteen subjects taking ospemifene at the time of inclusion (OSP) were compared to 16 subjects not taking any hormone (CTL). Vaginal biopsies were taken from the proximal and distal vaginal wall during surgery to evaluate histology, Ki-67 and ERα expression. OSP group showed thicker vaginal epithelium (349 ± 64 vs. 245 ± 53 µm, p < .001), higher proliferation index (212 ± 47 vs. 127 ± 28 Ki-67+ cells/mm, p < .001), higher epithelial (27.3 ± 3.1 vs. 20.6 ± 2.9 score, p < .001) and stromal (26.6 ± 4.9 vs. 20.6 ± 2.6 score, p < .001) ERα expression when compared to the CTL group. In postmenopausal women affected by VVA, 1 month intake of ospemifene is associated with an increased maturation, and ERα expression of the vaginal mucosa. These changes may partially explain the improvement of symptoms of vaginal atrophy reported with this drug.


Assuntos
Pós-Menopausa/efeitos dos fármacos , Tamoxifeno/análogos & derivados , Vagina/efeitos dos fármacos , Idoso , Receptor alfa de Estrogênio/metabolismo , Feminino , Humanos , Antígeno Ki-67/metabolismo , Pessoa de Meia-Idade , Pós-Menopausa/metabolismo , Tamoxifeno/farmacologia , Tamoxifeno/uso terapêutico , Vagina/metabolismo
19.
J Sex Med ; 13(1): 46-54, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26755086

RESUMO

INTRODUCTION: Dyslipidemia is a common risk factor for cardiovascular disease which may contribute to sexual dysfunction in women. AIMS: To assess the impact of dyslipidemia compared with other metabolic alterations on female sexual function. METHODS: In total, 466 women were enrolled in the study, of which 256 were postmenopausal. Dyslipidemia was defined based on high-density lipoprotein, low-density lipoprotein, or triglycerides levels. Women completed the Female Sexual Function Index (FSFI), the Female Sexual Distress Scale (FSDS), and the Middlesex Hospital Questionnaire (MHQ). Biochemical and anthropometric measurements were performed and the Framingham risk score (FRS) was calculated for each subject. MAIN OUTCOME MEASUREMENTS: FSFI, FSDS, and MHQ scores, prevalence of FSD and FRS. RESULTS: Median age of the population enrolled was 51.5 (range 42.0-58.0) years. The overall prevalence of FSD, according to FSFI and FSDS scores, was 24%. A significantly higher prevalence of FSFI (P = .001) and FSDS (P = .006) pathological scores were found in women with dyslipidemia compared with the control group. The prevalence of FSD was significantly higher in dyslipidemic women (P = .001). Women with dyslipidemia had significantly higher total scores in areas of depression, somatization, and obsession in the MHQ questionnaire compared with control women. Multivariate analysis showed that dyslipidemia (OR:1.7, CI 1.1-2.9, P = .037), postmenopausal status (OR:2.7, CI 1.5-4.7, P = .001), higher education (OR:0.6; CI 0.3-0.9, P = .038), and somatization (OR:1.7, CI 1.0-2.8, P = .045) were independently associated with FSD. The FRS was higher in dyslipidemic women (P = .001) and in those with FSD (P = .001), being associated with an almost doubled risk of developing FSD. CONCLUSION: Our results indicate that dyslipidemia is an independent risk factor for FSD irrespective of postmenopausal status. Also, psychopathological alterations such as somatization are strongly associated with sexual dysfunction. The direct correlation between FSFI score and FRS suggest the importance of cardiovascular integrity in female sexual health.


Assuntos
Doenças Cardiovasculares/prevenção & controle , Dislipidemias/complicações , Disfunções Sexuais Fisiológicas/etiologia , Adulto , Doenças Cardiovasculares/sangue , Doenças Cardiovasculares/fisiopatologia , Dislipidemias/sangue , Dislipidemias/fisiopatologia , Feminino , Humanos , Pessoa de Meia-Idade , Avaliação de Resultados em Cuidados de Saúde , Prevalência , Fatores de Risco , Disfunções Sexuais Fisiológicas/sangue , Disfunções Sexuais Fisiológicas/fisiopatologia
20.
Analyst ; 141(3): 963-73, 2016 Feb 07.
Artigo em Inglês | MEDLINE | ID: mdl-26668843

RESUMO

Different spectroscopic approaches are often used to probe specific aspects of amyloid fibril formation but are usually performed separately and under different conditions. This makes it problematic to relate different aspects of the aggregation process when these are monitored by different methods. We report on a multispectral approach for simultaneous acquisition of infrared, fluorescence and light scattering spectra of proteins undergoing aggregation. We have applied our approach to study ß-lactoglobulin, a milk protein known to form amyloid fibrils under well-established conditions. Our real-time multispectral measurements show that unfolding of this protein is followed by formation of early aggregates consisting of intermolecular ß-sheets with a typical infrared absorption at ∼1619 cm(-1) in (2)H2O. These aggregates, which lead to an increase in the light scattering signal, do not bind the amyloid-specific fluorophore ThT and therefore consist of oligomers or protofibrils. Fibril growth is then observed as a sigmoidal increase in ThT fluorescence. After ∼25 h, a plateau is observed in the intensities of ThT emission and of the band at 1619 cm(-1), indicating that no new fibrils are forming. However, a second phase in the light scattering signal taking place after ∼25 h suggests that the fibrils are assembling into larger structures, known as mature fibrils. This is associated with an upshift of the main ß-sheet band in the infrared spectrum. TEM analyses confirmed the existence of thick fibrils comprising 3-5 filaments.


Assuntos
Amiloide/química , Lactoglobulinas/química , Luz , Agregados Proteicos , Espalhamento de Radiação , Espectrometria de Fluorescência/métodos , Espectrofotometria Infravermelho/métodos , Cinética , Conformação Proteica em Folha beta , Estrutura Secundária de Proteína
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