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2.
Eur Rev Med Pharmacol Sci ; 28(3): 1155-1162, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38375728

RESUMO

OBJECTIVE: The aim of this study is to assess whether the touch of osteopathic manipulative treatment (OMT) can affect the endogenous production of oxytocin in full-term pregnant women and the assessment of well-being following the treatment. PATIENTS AND METHODS: In this study have been enrolled 57 pregnant women at full-term pregnancy (37th-41st week) for evaluation of the concentration of salivary oxytocin 2 minutes before and 2 minutes after a single session of OMT by an osteopath lasting for 30 minutes. Pre-OMT and post-OMT saliva samples were collected with the use of Salivette® salivary swabs. 7 salivary swabs were excluded from the analysis. 50 samples were analyzed with an appropriate ELISA kit. RESULTS: The mean OT salivary concentration pre-OMT was 89.98±16.39, and post-OMT was 100.60±19.13 tends to increase with p=0.0000051. In multivariate analysis, two subgroups show interesting data in the mean difference in OT salivary concentration post-OMT: women with painful contractions (p=0.06) and women under 35 years (p=0.09). CONCLUSIONS: The results of this study demonstrate that the effectiveness of OMT-increasing endogenous oxytocin is statistically significant in full-term pregnant women. The sensation of well-being found in most women indicates that there has been a predominantly central rather than peripheral oxytocin release after OMT.


Assuntos
Osteopatia , Ocitocina , Feminino , Humanos , Gravidez , Osteopatia/métodos , Dor
3.
Clin Breast Cancer ; 24(3): 253-260, 2024 04.
Artigo em Inglês | MEDLINE | ID: mdl-38220538

RESUMO

Therapeutical strategies in breast cancer are continuously updating. Recent researches assessed the possibility of irradiating only the surgical bed in selected patients (Partial Breast Irradiation, PBI). In 2014 we designed a study to evaluate toxicity and cosmesis of APBI using Volumetric Modulated Arc Therapy-Rapid Arc compared with hypofractionated whole breast irradiation (WBI). We present here the 5-years updated data. HYPAB was a single-institution randomized trial that recruited 172 patients from 2015 to 2018. Patients underwent conserving surgery and were randomized to either adjuvant WBI (40.5Gy/15 fractions with simultaneous boost to 48 Gy to tumoral bed) or APBI (30Gy/5 fractions), both delivered with VMAT-RA technique. Clinical evaluation was performed during the first visit, once a week during radiotherapy and during follow up. Cosmesis was assessed using the Harvard Scale for Breast Cosmesis. At the time of the analysis 161 patients were eligible, 53% in the WBI and 47% in the APBI group, with a median follow-up of 67 months. Most common late skin toxicities were G1 fibrosis (32%) and oedema (28%) and were higher in the WBI group; no G3 toxicities were observed. Cosmesis was rated poor in only 6 cases. 147 patients had no evidence of disease at the last follow-up, and no patients died of the disease. Mature results confirm the safety and efficacy of APBI in selected early stage breast cancer patients. Late toxicity is improved in the APBI arm at the cost of a slight increase in local relapse. Further studies are ongoing to better elucidate the use of APBI as a de-escalation approach.


Assuntos
Neoplasias da Mama , Feminino , Humanos , Neoplasias da Mama/radioterapia , Neoplasias da Mama/cirurgia , Pós-Menopausa , Mastectomia Segmentar , Recidiva Local de Neoplasia/epidemiologia , Recidiva Local de Neoplasia/prevenção & controle , Recidiva Local de Neoplasia/cirurgia , Mama/efeitos da radiação
4.
Phys Rev Lett ; 131(4): 041403, 2023 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-37566847

RESUMO

In this Letter, we present the design and performance of the frequency-dependent squeezed vacuum source that will be used for the broadband quantum noise reduction of the Advanced Virgo Plus gravitational-wave detector in the upcoming observation run. The frequency-dependent squeezed field is generated by a phase rotation of a frequency-independent squeezed state through a 285 m long, high-finesse, near-detuned optical resonator. With about 8.5 dB of generated squeezing, up to 5.6 dB of quantum noise suppression has been measured at high frequency while close to the filter cavity resonance frequency, the intracavity losses limit this value to about 2 dB. Frequency-dependent squeezing is produced with a rotation frequency stability of about 6 Hz rms, which is maintained over the long term. The achieved results fulfill the frequency dependent squeezed vacuum source requirements for Advanced Virgo Plus. With the current squeezing source, considering also the estimated squeezing degradation induced by the interferometer, we expect a reduction of the quantum shot noise and radiation pressure noise of up to 4.5 dB and 2 dB, respectively.

5.
Eur Phys J Plus ; 138(1): 100, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36741916

RESUMO

The CRESST experiment employs cryogenic calorimeters for the sensitive measurement of nuclear recoils induced by dark matter particles. The recorded signals need to undergo a careful cleaning process to avoid wrongly reconstructed recoil energies caused by pile-up and read-out artefacts. We frame this process as a time series classification task and propose to automate it with neural networks. With a data set of over one million labeled records from 68 detectors, recorded between 2013 and 2019 by CRESST, we test the capability of four commonly used neural network architectures to learn the data cleaning task. Our best performing model achieves a balanced accuracy of 0.932 on our test set. We show on an exemplary detector that about half of the wrongly predicted events are in fact wrongly labeled events, and a large share of the remaining ones have a context-dependent ground truth. We furthermore evaluate the recall and selectivity of our classifiers with simulated data. The results confirm that the trained classifiers are well suited for the data cleaning task.

6.
Appl Radiat Isot ; 194: 110670, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36696751

RESUMO

CRESST is a leading direct detection sub-GeVc-2 dark matter experiment. During its second phase, cryogenic bolometers were used to detect nuclear recoils off the CaWO4 target crystal nuclei. The previously established electromagnetic background model relies on Secular Equilibrium (SE) assumptions. In this work, a validation of SE is attempted by comparing two likelihood-based normalisation results using a recently developed spectral template normalisation method based on Bayesian likelihood. Albeit we find deviations from SE in some cases we conclude that these deviations are artefacts of the fit and that the assumptions of SE is physically meaningful.

7.
Eur J Paediatr Neurol ; 47: 118-130, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-38284996

RESUMO

BACKGROUND: Acute cerebellitis (AC) in children and adolescents is an inflammatory disease of the cerebellum due to viral or bacterial infections but also autoimmune-mediated processes. OBJECTIVE: To investigate the frequency of autoantibodies in serum and CSF as well as the neuroradiological features in children with AC. MATERIAL AND METHODS: Children presenting with symptoms suggestive of AC defined as acute/subacute onset of cerebellar symptoms and MRI evidence of cerebellar inflammation or additional CSF pleocytosis, positive oligoclonal bands (OCBs), and/or presence of autoantibodies in case of negative cerebellar MRI. Children fulfilling the above-mentioned criteria and a complete data set including clinical presentation, CSF studies, testing for neuronal/cerebellar and MOG antibodies as well as MRI scans performed at disease onset were eligible for this retrospective multicenter study. RESULTS: 36 patients fulfilled the inclusion criteria for AC (f:m = 14:22, median age 5.5 years). Ataxia was the most common cerebellar symptom present in 30/36 (83 %) in addition to dysmetria (15/36) or dysarthria (13/36). A substantial number of children (21/36) also had signs of encephalitis such as somnolence or seizures. In 10/36 (28 %) children the following autoantibodies (abs) were found: MOG-abs (n = 5) in serum, GFAPα-abs (n = 1) in CSF, GlyR-abs (n = 1) in CSF, mGluR1-abs (n = 1) in CSF and serum. In two further children, antibodies were detected only in serum (GlyR-abs, n = 1; GFAPα-abs, n = 1). MRI signal alterations in cerebellum were found in 30/36 children (83 %). Additional supra- and/or infratentorial lesions were present in 12/36 children, including all five children with MOG-abs. Outcome after a median follow-up of 3 months (range: 1 a 75) was favorable with an mRS ≤2 in 24/36 (67 %) after therapy. Antibody (ab)-positive children were significantly more likely to have a better outcome than ab-negative children (p = .022). CONCLUSION: In nearly 30 % of children in our study with AC, a range of abs was found, underscoring that autoantibody testing in serum and CSF should be included in the work-up of a child with suspected AC. The detection of MOG-abs in AC does expand the MOGAD spectrum.


Assuntos
Autoanticorpos , Encefalite , Adolescente , Criança , Pré-Escolar , Humanos , Ataxia , Cerebelo/diagnóstico por imagem , Encefalite/diagnóstico por imagem , Inflamação , Estudos Retrospectivos
8.
Lett Appl Microbiol ; 75(5): 1232-1245, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35871465

RESUMO

Diptera (Insecta) are able to transmit approximately 200 pathogenic microorganisms to humans and animals, causing more than 65 diseases, including bovine mastitis, which constitutes a major cause of economic losses in the dairy industry. In this scenario, 217 adult specimens of Diptera were collected from nine farms and identified to the family and/or species level. Of the 11 families recorded, Muscidae was the most prevalent (152 out of 217; 70%). All Diptera specimens were subjected to microbiological culture using conventional and selective media, and isolates were then identified at the species level by mass spectrometry. In total, 275 microorganisms were identified, with a predominance of pathogens related to environmental bovine mastitis (166/275 = 60·4%), that is, Enterococcus species (70/275 = 25·4%) and Escherichia coli (49/275 = 17·8%). Nontraditional agents related to bovine mastitis (called miscellaneous) were detected in 28% (77/275), as well as microorganisms with well-known zoonotic behaviour (e.g. Bacillus cereus). This is study contributes with knowledge of diversity of microorganisms carried by Diptera in the dairy environment, including pathogens associated with environmental and contagious bovine mastitis, and agents with human relevance. To our knowledge, a three-part chromogenic selective medium used to microbial culture of milk on farms was used for the first time to identification of pathogens in Diptera.


Assuntos
Dípteros , Mastite Bovina , Bovinos , Animais , Feminino , Humanos , Mastite Bovina/epidemiologia , Mastite Bovina/microbiologia , Leite/microbiologia , Prevalência , Escherichia coli , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz/métodos
9.
Phys Rev Lett ; 125(13): 131101, 2020 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-33034506

RESUMO

The quantum radiation pressure and the quantum shot noise in laser-interferometric gravitational wave detectors constitute a macroscopic manifestation of the Heisenberg inequality. If quantum shot noise can be easily observed, the observation of quantum radiation pressure noise has been elusive, so far, due to the technical noise competing with quantum effects. Here, we discuss the evidence of quantum radiation pressure noise in the Advanced Virgo gravitational wave detector. In our experiment, we inject squeezed vacuum states of light into the interferometer in order to manipulate the quantum backaction on the 42 kg mirrors and observe the corresponding quantum noise driven displacement at frequencies between 30 and 70 Hz. The experimental data, obtained in various interferometer configurations, is tested against the Advanced Virgo detector quantum noise model which confirmed the measured magnitude of quantum radiation pressure noise.

10.
Life Sci ; 254: 117787, 2020 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-32417372

RESUMO

AIMS: To evaluate the effects of esculin treatment on P2X7 receptor and mitochondrial dysfunction in the renal cortex of diabetic rats. MAIN METHODS: Male Wistar rats, 7 weeks old, were unilaterally nephrectomized. Part of these animals were induced to diabetes using streptozotocin (60 mg/kg). Diabetes was confirmed 48 h after induction, with blood glucose levels ≥200 mg/dL. Part of control and diabetic animals were selected to receive daily doses of esculin (50 mg/kg), during 8 weeks. The animals were placed in metabolic cages at the eighth week of protocol for 24 h urine collection and a small aliquot of blood was collected for biochemical analysis. After this procedure, the animals were euthanized and the remaining kidney was stored for histopathological analysis, Western blotting and mitochondrial high-resolution respirometry. KEY FINDINGS: Although esculin did not change metabolic parameters, renal biochemical function, neither TBARS in DM rats, esculin reduced P2X7 levels in these animals and restored mitochondrial function via glycolysis substrates and ß-oxidation. Besides, at the histological analysis, we observed that esculin reduced inflammatory infiltrates and collagen IV deposits as compared to diabetic group. SIGNIFICANCE: Esculin attenuated the development of renal injuries caused by hyperglycemia, proinflammatory and oxidative mechanisms mediated by P2X7 receptor, as seen by histological findings and improved mitochondrial function in diabetic animals. This suggests that esculin could be used as an adjuvant therapy to prevent the diabetic nephropathy.


Assuntos
Diabetes Mellitus Experimental/metabolismo , Esculina/farmacologia , Córtex Renal/metabolismo , Mitocôndrias/metabolismo , Receptores Purinérgicos P2X7/metabolismo , Animais , Glicemia/metabolismo , Diabetes Mellitus Experimental/patologia , Colágenos Fibrilares/metabolismo , Glicólise/efeitos dos fármacos , Inflamação/prevenção & controle , Córtex Renal/patologia , Masculino , Oxirredução/efeitos dos fármacos , Ratos , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
11.
Transl Med UniSa ; 23: 63-66, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-33457326

RESUMO

Blastic plasmacytoid dendritic cell neoplasm (BPDCN), an extremely rare and aggressive tumor, derives from plasmacytoid dendritic cell precursors and is characterized by CD4 and CD56 positivity accompanied by the expression of isolated myeloid, B- or T-cell lineage markers. Despite the recent introduction of specific targeted therapies, prognosis is still poor with a median overall survival of one year, and allogeneic bone marrow transplantation remains the only curative treatment in eligible patients. In this series, we described two cases of adult BPDCN treated with high dose cytarabine and methotrexate and autologous hematopoietic stem cell transplantation, or fludarabine, cytarabine, and idarubicin achieving the first a complete lasting remission, while the second only a transient improvement in skin lesions.

12.
Phys Rev Lett ; 123(23): 231108, 2019 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-31868444

RESUMO

Current interferometric gravitational-wave detectors are limited by quantum noise over a wide range of their measurement bandwidth. One method to overcome the quantum limit is the injection of squeezed vacuum states of light into the interferometer's dark port. Here, we report on the successful application of this quantum technology to improve the shot noise limited sensitivity of the Advanced Virgo gravitational-wave detector. A sensitivity enhancement of up to 3.2±0.1 dB beyond the shot noise limit is achieved. This nonclassical improvement corresponds to a 5%-8% increase of the binary neutron star horizon. The squeezing injection was fully automated and over the first 5 months of the third joint LIGO-Virgo observation run O3 squeezing was applied for more than 99% of the science time. During this period several gravitational-wave candidates have been recorded.

13.
Ann Oncol ; 25(8): 1597-603, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24827133

RESUMO

BACKGROUND: Biliary tract cancer (BTC) is a highly lethal disease for which the best available therapy remains undetermined. The mammalian target of rapamycin (mTOR) pathway is up-regulated in several cancers, including BTC, and preclinical evidence indicates that mTOR inhibition may be effective in the treatment of BTC. We sought to evaluate the activity and tolerability of the mTOR inhibitor RAD001-everolimus-in patients with BTC progressing after prior chemotherapy. PATIENTS AND METHODS: This was an open-label, single-arm, phase II study (EUDRACT 2008-007152-94) conducted in eight sites in Italy. Patients with locally advanced, metastatic or recurrent BTC progressing despite previous chemotherapy received a daily oral dose of everolimus 10 mg administered continuously in 28-day cycles. The two primary end points were disease control rate (DCR) and objective response rate (ORR). Secondary end points were progression-free survival (PFS), overall survival (OS) and time-to-progression (TTP). RESULTS: Thirty-nine patients were enrolled. The DCR was 44.7%, and the ORR was 5.1%. One patient showed a partial response at 2 months and one patient showed a complete response sustained up to 8 months. The median (95% confidence interval) PFS was 3.2 (1.8-4.0) months, and the median OS was 7.7 (5.5-13.2) months. The median TTP was 2.0 (1.7-3.7) months. Most common toxicities were asthenia (43.6%), thrombocytopenia (35.9%), pyrexia (30.8%) and erythema, mainly of mild-to-moderate severity. Two patients required dose reduction due to adverse events. CONCLUSION: Everolimus demonstrated a favourable toxicity profile and encouraging anti-tumour activity. Further trials are needed to establish the role of everolimus in the treatment of BTC. EUDRACT 2008-007152-94.


Assuntos
Antineoplásicos/uso terapêutico , Neoplasias do Sistema Biliar/tratamento farmacológico , Sirolimo/análogos & derivados , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias do Sistema Biliar/mortalidade , Neoplasias do Sistema Biliar/patologia , Quimioterapia Adjuvante , Desoxicitidina/análogos & derivados , Desoxicitidina/uso terapêutico , Progressão da Doença , Intervalo Livre de Doença , Everolimo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Compostos Organoplatínicos/uso terapêutico , Qualidade de Vida , Sirolimo/uso terapêutico , Análise de Sobrevida
14.
Rev Sci Instrum ; 85(3): 034501, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24689604

RESUMO

There is a strong scientific case for the study of gravitational waves at or below the lower end of current detection bands. To take advantage of this scientific benefit, future generations of ground based gravitational wave detectors will need to expand the limit of their detection bands towards lower frequencies. Seismic motion presents a major challenge at these frequencies and vibration isolation systems will play a crucial role in achieving the desired low-frequency sensitivity. A compact vibration isolation system designed to isolate in-vacuum optical benches for Advanced Virgo will be introduced and measurements on this system are used to present its performance. All high performance isolation systems employ an active feedback control system to reduce the residual motion of their suspended payloads. The development of novel control schemes is needed to improve the performance beyond what is currently feasible. Here, we present a multi-channel feedback approach that is novel to the field. It utilizes a linear quadratic regulator in combination with a Kalman state observer and is shown to provide effective suppression of residual motion of the suspended payload. The application of state observer based feedback control for vibration isolation will be demonstrated with measurement results from the Advanced Virgo optical bench suspension system.

16.
Curr Med Chem ; 20(6): 735-50, 2013 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-23276136

RESUMO

Ischemic insults and neurodegenerative diseases are by far the leading cause of mortality and disability. Whole-body hypoperfusion, as it occurs in polytraumatic and hemorrhagic shock, is alike an increasingly frequent condition, especially due to traffic accidents, wars and acts of terrorism. It is now clearly established that inflammatory processes play a fundamental role in the pathophysiology of both hypoperfusion/ischemia damage (be it generalized to the whole body, as in the case of shock, or limited to individual organs) and neurodegenerative diseases (Alzheimer's disease, Parkinson's disease, multiple sclerosis, amyotrophic lateral sclerosis). On the other hand, concurrent animal and human data show that melanocortin peptides with agonist activity at melanocortin MC3/MC4 receptors are highly effective in different shock conditions as well as in conditions of ischemia/ischemia-reperfusion of individual organs (heart, brain, intestine, kidney, etc.), and accumulating evidence indicates that such effects of melanocortins are mostly due to quite peculiar antiinflammatory mechanisms. Melanocortins have also long been known (i) to exert important neurotrophic effects, not only during fetal development but also in adulthood, in different animal models of brain lesions; (ii) to reduce the morphological correlates of brain aging; (iii) to retard the behavioral deficits that develop during the aging process. Moreover, recent data from different laboratories show that after brain ischemic episodes melanocortins activate the transcription of neurotrophins and their receptors in the cerebral cortex and in the hippocampus, and increase the proliferation of progenitor neuron cells. The above arguments support the view that pharmacokinetically suitable agonists at MC3/MC4 melanocortin receptors may represent a completely innovative class of drugs for an effective treatment of both ischemic and neurodegenerative diseases.


Assuntos
Anti-Inflamatórios/uso terapêutico , Fármacos do Sistema Nervoso Central/uso terapêutico , Isquemia/tratamento farmacológico , Melanocortinas/uso terapêutico , Doenças Neurodegenerativas/tratamento farmacológico , Sequência de Aminoácidos , Animais , Anti-Inflamatórios/química , Anti-Inflamatórios/farmacologia , Fármacos do Sistema Nervoso Central/química , Fármacos do Sistema Nervoso Central/farmacologia , Humanos , Inflamação/tratamento farmacológico , Inflamação/imunologia , Inflamação/fisiopatologia , Isquemia/imunologia , Isquemia/fisiopatologia , Melanocortinas/química , Melanocortinas/farmacologia , Dados de Sequência Molecular , Doenças Neurodegenerativas/imunologia , Doenças Neurodegenerativas/fisiopatologia , Receptores de Melanocortina/agonistas
17.
Nutr Metab Cardiovasc Dis ; 23(8): 771-5, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22770750

RESUMO

AIM: The study was aimed to evaluate the influence of gender on left ventricular (LV) remodeling in metabolic syndrome (MetS). METHODS AND RESULTS: We enrolled 200 subjects without diabetes or overt cardiovascular diseases, never treated with anti-hypertensive drugs or statins: 60 men and 40 women with MetS matched by age, gender and 24 h systolic and diastolic blood pressure (BP) with 60 men and 40 women without MetS. The patients underwent blood tests, 24 h our BP monitoring, LV echocardiographic examination. LV mass indexed by eight(2.7) was significantly greater in men and women with MetS than without MetS. Compared with women without MetS, women with MetS had significantly higher posterior wall thickness and relative wall thickness, greater prevalence of LV concentric remodeling/hypertrophy and lower indices of LV diastolic function, whereas all these parameters were not significantly different between men with and without MetS. MetS was an independent predictor of relative wall thickness and LV mass index in women, but not in men. CONCLUSION: The impact of MetS on LV remodeling is significantly influenced by gender: the effects of MetS are more pronounced in women, with development of LV concentric hypertrophy/remodeling and preclinical diastolic dysfunction.


Assuntos
Hipertrofia Ventricular Esquerda/epidemiologia , Hipertrofia Ventricular Esquerda/fisiopatologia , Síndrome Metabólica/fisiopatologia , Remodelação Ventricular/fisiologia , Adulto , Antropometria , Pressão Sanguínea , Estudos de Casos e Controles , Diabetes Mellitus , Ecocardiografia , Feminino , Humanos , Hipertrofia Ventricular Esquerda/diagnóstico por imagem , Masculino , Síndrome Metabólica/diagnóstico , Pessoa de Meia-Idade , Prevalência , Fatores Sexuais , Função Ventricular Esquerda/fisiologia
18.
Phys Rev Lett ; 107(27): 271102, 2011 Dec 30.
Artigo em Inglês | MEDLINE | ID: mdl-22243300

RESUMO

The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2-20×10(-50) strain(2) Hz(-1) and 5-35×10(-49) strain(2) Hz(-1) sr(-1) for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as ≈7×10(-25) in the most sensitive frequency range near 160 Hz.

19.
Am J Transplant ; 9(10): 2429-34, 2009 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-19656133

RESUMO

Pharmacokinetic (PK) interactions between protease inhibitors (PI(s)) and immunosuppressive agents (IS) are critical elements in the management of HIV-infected patients who undergo liver transplantation (LT(x)). The primary objective of this study was to evaluate the decreases in IS dosages necessary to maintain an appropriate therapeutic window (TW) after initiating PI-based antiretroviral therapy regimens post-LT(x). Single-center, PK cross-sectional study of consecutive HIV-infected adult patients who underwent LT(x) was done. Blood trough concentrations (C(t)) of IS were obtained using a commercial MEIA test; plasma C(t) of PI(s) were measured using HPLC. Twelve consecutive HIV-infected adult patients (11 males, 1 female) were enrolled. More rapid increases in IS plasma C(t) were observed 48 h after initiating ritonavir (RTV)-boosted PI therapy post-LT(x) than when using unboosted PI(s). Seven patients developed acute renal failure. The median fold decrease in IS dosages required to regain IS concentrations that were in the TW was 7.5 (range 6-14) after resuming boosted PI(s) and 2.9 (range 2-4) after unboosted PI(s). The overall median time necessary to reach IS TW after dose adjustment was 3.5 days (range 0-15). Unboosted PI(s) exhibited lesser PK interactions with IS than did RTV-boosted PI(s) and were thus more amenable to use in the post-LT(x) setting.


Assuntos
Infecções por HIV/tratamento farmacológico , Inibidores da Protease de HIV/uso terapêutico , Imunossupressores/uso terapêutico , Transplante de Fígado , Adulto , Cromatografia Líquida de Alta Pressão , Estudos Transversais , Relação Dose-Resposta a Droga , Feminino , Infecções por HIV/cirurgia , Inibidores da Protease de HIV/administração & dosagem , Inibidores da Protease de HIV/sangue , Humanos , Imunossupressores/administração & dosagem , Masculino , Pessoa de Meia-Idade
20.
Infection ; 37(3): 250-5, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19471855

RESUMO

BACKGROUND: No data are available on the use of atazanavir (ATV) in patients with end-stage liver disease (ESLD), and guidelines discourage its use in this setting. The objective of our study was to evaluate the efficacy and safety of unboosted ATV in patients infected with HIV and suffering from ESLD who had been screened for orthotopic liver transplantation (OLT(x)). PATIENTS AND METHODS: This was a single-arm, 24-week pilot study. Atazanavir-naïve patients undergoing a highly active antiretroviral therapy were switched to ATV 400 mg daily plus two non-thymidine nucleoside reverse transcriptase inhibitors. RESULTS: Fifteen patients (ten males and five females, age range 36-59 years) were enrolled in the study. Of these, 11 (73%) had a baseline CD4 cell count > 200 microl(-1), and 12 had undetectable plasma HIV-RNA. 12 subjects (80%) were able to remain on ATV until week 24 (n = 10) or transplantation (n = 2). At the end of the study, the median CD4 cell count was 340 microl(-1) , and nine of the ten patients had undetectable RNA. During the study period, two patients received a transplant, two died of intracerebral hemorrhage and lactic acidosis, respectively, and one discontinued ATV. Among the ten patients completing the 24-week study, no significant changes from baseline were observed for most of the liver function markers, with the exception of unconjugated bilirubin (from 1.15 mg/dl to 1.32 mg/dl, p = 0.047). CONCLUSIONS: Unboosted ATV treatment did not worsen liver disease and was able to maintain or gain immunovirological eligibility for OLT(x) in all patients, with a limited effect on unconjugated bilirubin. These results suggest that ATV is an easy-to-use drug in patients with ESLD.


Assuntos
Fármacos Anti-HIV/uso terapêutico , Infecções por HIV/complicações , Infecções por HIV/tratamento farmacológico , Falência Hepática/complicações , Oligopeptídeos/uso terapêutico , Piridinas/uso terapêutico , Adulto , Fármacos Anti-HIV/efeitos adversos , Terapia Antirretroviral de Alta Atividade , Sulfato de Atazanavir , Contagem de Linfócito CD4 , Feminino , Seguimentos , Infecções por HIV/imunologia , Humanos , Falência Hepática/mortalidade , Testes de Função Hepática , Transplante de Fígado , Masculino , Pessoa de Meia-Idade , Oligopeptídeos/efeitos adversos , Projetos Piloto , Piridinas/efeitos adversos , Resultado do Tratamento , Carga Viral
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