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1.
Am J Transplant ; 17(5): 1267-1277, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-27865040

RESUMO

Although single-center and cross-sectional studies have suggested a modest impact of liver donation on donor psychological well-being, few studies have assessed these outcomes prospectively among a large cohort. We conducted one of the largest, prospective, multicenter studies of psychological outcomes in living liver donors within the Adult-to-Adult Living Donor Liver Transplantation Cohort Study2 (A2ALL-2) consortium. In total, 271 (91%) of 297 eligible donors were interviewed at least once before donation and at 3, 6, 12, and 24 mo after donation using validated measures. We found that living liver donors reported low rates of major depressive (0-3%), alcohol abuse (2-5%), and anxiety syndromes (2-3%) at any given assessment in their first 2 years after donation. Between 4.7% and 9.6% of donors reported impaired mental well-being at various time points. We identified significant predictors for donors' perceptions of being better people and experiencing psychological growth following donation, including age, sex, relationship to recipient, ambivalence and motivation regarding donation, and feeling that donation would make life more worthwhile. Our results highlight the need for close psychosocial monitoring for those donors whose recipients died (n=27); some of those donors experienced guilt and concerns about responsibility. Careful screening and targeted, data-driven follow-up hold promise for optimizing psychological outcomes following this procedure for potentially vulnerable donors.


Assuntos
Transtorno Depressivo Maior/psicologia , Transplante de Fígado/psicologia , Doadores Vivos/psicologia , Qualidade de Vida , Adulto , Estudos Transversais , Transtorno Depressivo Maior/epidemiologia , Feminino , Seguimentos , Sobrevivência de Enxerto , Humanos , Masculino , Prognóstico , Estudos Prospectivos , Inquéritos e Questionários
2.
Am J Transplant ; 17(11): 2790-2802, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28556422

RESUMO

The availability of direct-acting antiviral agents for the treatment of hepatitis C virus (HCV) infection has resulted in a profound shift in the approach to the management of this infection. These changes have affected the practice of solid organ transplantation by altering the framework by which patients with end-stage organ disease are managed and receive organ transplants. The high level of safety and efficacy of these medications in patients with chronic HCV infection provides the opportunity to explore their use in the setting of transplanting organs from HCV-viremic patients into non-HCV-viremic recipients. Because these organs are frequently discarded and typically come from younger donors, this approach has the potential to save lives on the solid organ transplant waitlist. Therefore, an urgent need exists for prospective research protocols that study the risk versus benefit of using organs for hepatitis C-infected donors. In response to this rapidly changing practice and the need for scientific study and consensus, the American Society of Transplantation convened a meeting of experts to review current data and develop the framework for the study of using HCV viremic organs in solid organ transplantation.


Assuntos
Hepatite C/transmissão , Transplante de Órgãos , Doadores de Tecidos , Viremia/transmissão , Hepacivirus/fisiologia , Hepatite C/virologia , Humanos , Sociedades Médicas , Viremia/virologia
3.
Haemophilia ; 23(2): 198-206, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28124511

RESUMO

INTRODUCTION: Chronic hepatitis C virus (HCV) infection is prevalent among patients with inherited bleeding disorders and is a leading cause of mortality in those with haemophilia. AIM: We evaluated the efficacy and safety of ledipasvir-sofosbuvir and sofosbuvir plus ribavirin in patients with chronic HCV genotype 1-4 infection and an inherited bleeding disorder. METHODS: Ledipasvir-sofosbuvir was administered for 12 weeks to patients with genotype 1 or 4 infection and for 12 or 24 weeks to treatment-experienced cirrhotic patients with genotype 1 infection. Patients with genotype 2 and 3 infection received sofosbuvir plus ribavirin for 12 and 24 weeks respectively. RESULTS: The majority of the 120 treated patients had a severe bleeding disorder (55%); overall, 65% of patients had haemophilia A and 26% of patients had haemophilia B; 22% were HIV coinfected. Sustained virologic response at 12 weeks posttreatment was 99% (98/99) in patients with genotype 1 or 4 infection; 100% (5/5) in treatment-experienced cirrhotic patients with genotype 1 infection; 100% (10/10) in patients with genotype 2 infection; and 83% (5/6) in patients with genotype 3 infection. There were no treatment discontinuations due to adverse events (AEs). The most frequent non-bleeding AEs were fatigue, headache, diarrhoea, nausea and insomnia. Bleeding AEs occurred in 22 patients, of which all but one were considered unrelated to treatment. CONCLUSION: Treatment with ledipasvir-sofosbuvir for patients with HCV genotype 1 or 4 infection or sofosbuvir plus ribavirin for patients with genotype 2 or 3 infection was highly effective and well tolerated among those with inherited bleeding disorders.


Assuntos
Antivirais/uso terapêutico , Benzimidazóis/uso terapêutico , Fluorenos/uso terapêutico , Hepatite C Crônica/tratamento farmacológico , Ribavirina/uso terapêutico , Sofosbuvir/uso terapêutico , Adulto , Idoso , Antivirais/administração & dosagem , Benzimidazóis/administração & dosagem , Combinação de Medicamentos , Feminino , Fluorenos/administração & dosagem , Humanos , Masculino , Pessoa de Meia-Idade , Ribavirina/administração & dosagem , Sofosbuvir/administração & dosagem , Resultado do Tratamento , Adulto Jovem
4.
Am J Transplant ; 14(8): 1870-9, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24935609

RESUMO

We aimed to determine whether frailty, a validated geriatric construct of increased vulnerability to physiologic stressors, predicts mortality in liver transplant candidates. Consecutive adult outpatients listed for liver transplant with laboratory Model for End-Stage Liver Disease (MELD) ≥ 12 at a single center (97% recruitment rate) underwent four frailty assessments: Fried Frailty, Short Physical Performance Battery (SPPB), Activities of Daily Living (ADL) and Instrumental ADL (IADL) scales. Competing risks models associated frailty with waitlist mortality (death/delisting for being too sick for liver transplant). Two hundred ninety-four listed liver transplant patients with MELD ≥ 12, median age 60 years and MELD 15 were followed for 12 months. By Fried Frailty score ≥3, 17% were frail; 11/51 (22%) of the frail versus 25/243 (10%) of the not frail died/were delisted (p = 0.03). Each 1-unit increase in the Fried Frailty score was associated with a 45% (95% confidence interval, 4-202) increased risk of waitlist mortality adjusted for MELD. Similarly, the adjusted risk of waitlist mortality associated with each 1-unit decrease (i.e. increasing frailty) in the Short Physical Performance Battery (hazard ratio 1.19, 95% confidence interval 1.07-1.32). Frailty is prevalent in liver transplant candidates. It strongly predicts waitlist mortality, even after adjustment for liver disease severity demonstrating the applicability and importance of the frailty construct in this population.


Assuntos
Doença Hepática Terminal/cirurgia , Falência Hepática/cirurgia , Transplante de Fígado , Atividades Cotidianas , Pessoas com Deficiência , Feminino , Seguimentos , Humanos , Fígado/cirurgia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Fatores de Risco , Sarcopenia/terapia , Índice de Gravidade de Doença , Resultado do Tratamento , Listas de Espera
5.
Am J Transplant ; 14(11): 2588-94, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25243648

RESUMO

Survival benefit (SB) for first liver transplantation (LT) is favorable at Model for End-Stage Liver Disease (MELD)≥15. Herein, we identify the MELD threshold for SB from repeat liver transplantation (ReLT) by recipient hepatitis C virus (HCV) status and donor risk index (DRI). We analyzed lab MELD scores in new United Network for Organ Sharing registrants for ReLT from March 2002 to January 2010. Risk of ReLT graft failure≤1 year versus waitlist mortality was calculated using Cox regression, adjusting for recipient characteristics. Of 3057 ReLT candidates, 54% had HCV and 606 died while listed. There were 1985 ReLT recipients, 52% had HCV and 567 ReLT graft failures by 1 year. Unadjusted waitlist mortality and post-ReLT graft failure rates were 416 (95% confidence interval [CI] 384-450) and 375 (95% CI 345-407) per 1000 patient-years, respectively. Waitlist mortality was higher with increasing waitlist MELD (p<0.001). The MELD for SB from ReLT overall was 21 (21 in non-HCV and 24 in HCV patients). MELD for SB varied by DRI in HCV patients (MELD 21, 24 and 27 for low, medium and high DRI, respectively) but did not vary for non-HCV patients. Compared to first LT, ReLT requires a higher MELD threshold to achieve an SB resulting in a narrower therapeutic window to optimize the utility of scarce liver grafts.


Assuntos
Doença Hepática Terminal/cirurgia , Hepatite C/complicações , Transplante de Fígado , Reoperação , Análise de Sobrevida , Doadores de Tecidos , Adulto , Doença Hepática Terminal/complicações , Feminino , Rejeição de Enxerto , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Estados Unidos , Listas de Espera
6.
Am J Transplant ; 14(5): 1129-35, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24636466

RESUMO

Achievement of a sustained virologic response (SVR) with antiviral therapy significantly improves graft survival in hepatitis C virus (HCV) monoinfected liver transplant (LT) patients. Risks and benefits of HCV therapy in HCV-human immunodeficiency virus (HIV) coinfected LT recipients are not well established. Among 89 HCV-HIV LT recipients in the HIVTR cohort, 39 (23% Black, 79% genotype 1, 83% fibrosis stage ≤ 1) were treated with peginterferon-a2a or a2b plus ribavirin for a median 363 days (14-1373). On intent-to-treat basis, 22% (95% CI: 10-39) and 14% (95% CI: 5-30) achieved an end-of-treatment response (EOTR) and SVR, respectively. By per-protocol analysis (completed 48 weeks of therapy ± dose reductions), 42% and 26% had EOTR and SVR, respectively. Severe adverse events occurred in 85%, with 26% hospitalized with infections and 13% developing acute rejection. Early discontinuations and dose reductions occurred in 38% and 82%, respectively, despite use of growth factors in 85%. Eighteen of 39 treated patients (46%) subsequently died/had graft loss, with 10 (26%) attributed to recurrent HCV. In conclusion, SVR rates are low and tolerability is poor in HCV-HIV coinfected transplant recipients treated with peginterferon and ribavirin. These results highlight the critical need for better tolerated and more efficacious HCV therapies for HCV-HIV coinfected transplant recipients.


Assuntos
Antivirais/uso terapêutico , Infecções por HIV/tratamento farmacológico , Hepatite C Crônica/tratamento farmacológico , Interferon-alfa/uso terapêutico , Transplante de Fígado/efeitos adversos , Polietilenoglicóis/uso terapêutico , Ribavirina/uso terapêutico , Transplantados , Adolescente , Adulto , Idoso , Criança , DNA Viral/genética , Quimioterapia Combinada , Feminino , Seguimentos , Rejeição de Enxerto/tratamento farmacológico , Rejeição de Enxerto/etiologia , Rejeição de Enxerto/mortalidade , HIV/genética , HIV/isolamento & purificação , Infecções por HIV/complicações , Infecções por HIV/mortalidade , Infecções por HIV/virologia , Hepacivirus/genética , Hepacivirus/isolamento & purificação , Hepatite C Crônica/complicações , Hepatite C Crônica/mortalidade , Hepatite C Crônica/virologia , Humanos , Hepatopatias/complicações , Hepatopatias/mortalidade , Hepatopatias/cirurgia , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase , Prognóstico , Estudos Prospectivos , Proteínas Recombinantes/uso terapêutico , Taxa de Sobrevida , Resultado do Tratamento , Adulto Jovem
7.
J Viral Hepat ; 21(8): e74-7, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24773782

RESUMO

Hepatitis E virus (HEV) has been reported to cause acute and chronic hepatitis in those with HIV infection and among solid organ transplant recipients in Europe. Limited data indicate that HEV is endemic in the United States, but the prevalence and significance of HEV infection among those with HIV and awaiting solid organ transplantation is unknown. We evaluated anti-HEV IgM and IgG antibodies and HEV RNA in 166 HIV-infected solid organ transplant candidates enrolled in the NIH HIV-Transplant Cohort. Overall prevalence of anti-HEV IgG approached 20% in both liver and renal transplant candidates. Evidence of recent infection was present in approximately 2% of liver transplant candidates and none of the kidney transplant candidates. HEV RNA was not detected in any patient. We conclude that markers of HEV infection are frequent among candidates for transplantation, but active, ongoing viremia is not seen. Evidence of recent infection (acute on chronic) liver disease was present in liver but not kidney recipients.


Assuntos
Infecções por HIV/complicações , Hepatite E/epidemiologia , Hepevirus/isolamento & purificação , Adulto , Feminino , Anticorpos Anti-Hepatite/sangue , Humanos , Imunoglobulina G/sangue , Imunoglobulina M/sangue , Masculino , Pessoa de Meia-Idade , Prevalência , RNA Viral/sangue , Estados Unidos/epidemiologia
8.
Am J Transplant ; 12(4): 947-53, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-22300591

RESUMO

Once a liver offer has been refused locally and regionally, it is offered nationally. We characterized nationally (n = 1567) versus locally (n = 19 893) placed grafts from adult, nonfulminant, deceased donor liver transplants (LT) from 2/1/05 to 1/31/10. Donors of nationally versus locally placed livers differed by age (50 vs. 42 years), positive HCV antibody (11 vs. 2%) and death from stroke (51 vs. 42%) (p < 0.001 for all). Recipients of nationally versus locally placed livers differed by LT-MELD (20 vs. 24), rates of ascites (35 vs. 37%), encephalopathy (12 vs. 15%), hepatocellular (17 vs. 24%) and nonhepatocellular exceptions (6 vs. 11%) (p ≤ 0.03 for all). Six (5%) centers utilized 64% of the nationally placed grafts while 43 (38%) centers accepted zero during the 5-year period; all high volume centers used ≥1. Compared to local distribution, transplantation with a nationally placed liver was associated with a similar adjusted risk of graft (HR, 0.99; 95% CI, 0.86-1.14) and patient (HR, 0.98; 95% CI, 0.84-1.14; p = 0.77) survival. In conclusion, utilization of nationally placed livers is highly concentrated in very few centers, with no increased adjusted risk of graft loss. These findings provide the foundation for a more informed discussion about changing our current liver allocation and distribution policies.


Assuntos
Seleção do Doador , Doença Hepática Terminal/epidemiologia , Hospitais/estatística & dados numéricos , Transplante de Fígado/mortalidade , Padrões de Prática Médica , Doadores de Tecidos/provisão & distribuição , Obtenção de Tecidos e Órgãos , Adulto , Doença Hepática Terminal/terapia , Etnicidade , Feminino , Sobrevivência de Enxerto , Humanos , Masculino , Pessoa de Meia-Idade , Avaliação de Processos e Resultados em Cuidados de Saúde , Fatores de Risco , Taxa de Sobrevida , Estados Unidos/epidemiologia
10.
Am J Transplant ; 11(2): 296-302, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21219572

RESUMO

Some studies have found that donor-recipient gender mismatch predicts posttransplant outcomes but whether this is independent of donor quality is unknown. To evaluate the association between gender mismatch and graft loss, 11 508 females (F) and 16 714 males (M) who underwent liver transplant from March 1, 2002 to December 31, 2007 were studied. Of 11 donor characteristics, clinically relevant differences between F and M donors were median age (47 vs. 39 years), height (165 vs. 178 cm) and proportion dying of stroke (59 vs. 35%) (p < 0.001 for all). The donor risk index was significantly lower for F than M donors (1.3 vs. 1.6, p < 0.001). Recipients of gender-mismatched grafts had an 11% higher risk of graft loss (p < 0.001). Compared to M→M donor-recipient-matched transplants in univariable analysis, F→M mismatch was associated with a 17% increased risk of graft loss (95% CI = 1.11-1.24, p < 0.001), whereas M→F mismatch was not (HR = 1.02; 95% CI = 0.96-1.09; p = 0.46). However, adjustment for significant recipient and donor factors eliminated the association between F→M mismatch and graft loss (HR = 0.95; 95% CI = 0.89-1.02; p = 0.18). In conclusion, donor quality differs significantly between female and male donors-female donors are older, shorter and die more frequently of stroke-and gender differences in donor quality, rather than gender mismatch are predictive of graft loss.


Assuntos
Transplante de Fígado/efeitos adversos , Caracteres Sexuais , Doadores de Tecidos , Adulto , Tamanho Corporal , Estudos de Coortes , Feminino , Rejeição de Enxerto/etiologia , Humanos , Estimativa de Kaplan-Meier , Transplante de Fígado/mortalidade , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Resultado do Tratamento , Estados Unidos/epidemiologia , Adulto Jovem
11.
J Viral Hepat ; 18(6): 415-23, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-20626626

RESUMO

The hepatitis B virus (HBV) replicates via an error-prone reverse transcriptase generating potential drug-resistant quasispecies. The degree of HBV variability in liver vs peripheral blood mononuclear cells (PBMC) in patients on long-term suppressive antivirals is unclear. We characterized HBV replication, drug resistance and molecular diversity in patients with plasma HBV DNA undetectable by clinical assays. Explant liver (n=9), PBMC (n=6) and plasma (n=7) from nine such patients undergoing liver transplantation were evaluated for HBV genomes by sensitive PCR/nucleic acid hybridization assay. Cases with HBV DNA in liver and PBMC were tested for covalently closed circular DNA (HBV cccDNA). HBV polymerase (P) amplicons were cloned, sequenced and both P and overlapping surface (S) gene sequences were analysed. HBV DNA was detected in 43% (3/7) of plasma, 100% (9/9) of liver and 83% (5/6) of PBMC samples. HBV cccDNA was detected in all liver and one PBMC sample. Four patients had a clinical diagnosis of resistance. HBV P gene sequencing revealed 100% wild type (wt) in plasma (2/2), 83% wt in PBMC (5/6) but livers of 3/9 (33%) contained wt and 6/9 (66%) carried resistance to lamivudine and/or adefovir. The translated S gene revealed no changes affecting HBV antigenicity. Sequences from livers with antiviral resistant mutants revealed greater interpatient quasispecies diversity. Despite apparent HBV suppression, the liver continues to support HBV replication and extrahepatic HBV can be detected. PBMC may be a sanctuary for wt virus during antiviral therapy, while the liver harbours more drug-resistant viruses. Drug resistance correlates with intrahepatic viral diversity.


Assuntos
Vírus da Hepatite B/genética , Hepatite B/virologia , Transplante de Fígado , Fígado/virologia , Adenina/análogos & derivados , Adenina/uso terapêutico , Adulto , Idoso , Antivirais/uso terapêutico , Povo Asiático , DNA Circular/sangue , DNA Viral/análise , Resistência a Medicamentos , Feminino , Produtos do Gene pol/genética , Variação Genética , Genoma Viral , Guanina/análogos & derivados , Guanina/uso terapêutico , Hepatite B/terapia , Vírus da Hepatite B/isolamento & purificação , Vírus da Hepatite B/fisiologia , Humanos , Lamivudina/uso terapêutico , Masculino , Pessoa de Meia-Idade , Organofosfonatos/uso terapêutico , Filogenia , Tenofovir , Transativadores/genética , Proteínas do Envelope Viral/genética , Proteínas Virais Reguladoras e Acessórias , Replicação Viral
12.
Am J Transplant ; 10(12): 2658-64, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21087414

RESUMO

This study examined factors associated with the gender disparity in wait-list mortality in the MELD era. Adult patients listed for liver transplantation from 2002 to 2008 were included. Females [12 585(36%)] and males [22 126(64%)] differed clinically by age (54 vs. 52 years), height (1.6 vs. 1.8 m), listing estimated glomerular filtration rate [(eGFR); 70 vs. 83 mL/min] and cirrhosis etiology. Holding MELD constant, females were at 19% (95% CI, 1.13-1.25, p < 0.001) higher risk of wait-list mortality than males under the current allocation system. The relative hazard increased with worsening renal function, whether measured by serum creatinine or eGFR. Adjustment for MELD, age, African-American race, cirrhosis etiology, region and ABO group attenuated this relative hazard (HR 1.16; 95% CI, 1.10-1.22; p < 0.001) but additional adjustment for height completely explained this gender disparity in wait-list mortality (HR 1.05; 95% CI, 0.98-1.12; p = 0.2). Transplantation rates, however, remained lower among females, even after adjustment for height (HR 0.88; 95% CI, 0.82-0.92; p < 0.001). In conclusion, under the current liver allocation system, women have a 19% increased risk of wait-list mortality compared to men with the same MELD scores. Height contributes to this gender disparity, possibly reflecting differences in transplantation rates for shorter individuals.


Assuntos
Estatura , Doença Hepática Terminal/cirurgia , Transplante de Fígado/mortalidade , Listas de Espera/mortalidade , Adulto , Doença Hepática Terminal/mortalidade , Feminino , Alocação de Recursos para a Atenção à Saúde , Humanos , Fígado/cirurgia , Masculino , Pessoa de Meia-Idade , Fatores Sexuais
13.
Am J Transplant ; 10(5): 1268-75, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20346065

RESUMO

Liver transplantation (LT) is the treatment of choice for end-stage liver disease, but is controversial in patients with human immunodeficiency virus (HIV) infection. Using a prospective cohort of HIV-hepatitis B virus (HBV) coinfected patients transplanted between 2001-2007; outcomes including survival and HBV clinical recurrence were determined. Twenty-two coinfected patients underwent LT; 45% had detectable HBV DNA pre-LT and 72% were receiving anti-HBV drugs with efficacy against lamivudine-resistant HBV. Post-LT, all patients received hepatitis B immune globulin (HBIG) plus nucleos(t)ide analogues and remained HBsAg negative without clinical evidence of HBV recurrence, with a median follow-up 3.5 years. Low-level HBV viremia (median 108 IU/mL, range 9-789) was intermittently detected in 7/13 but not associated with HBsAg detection or ALT elevation. Compared with 20 HBV monoinfected patients on similar HBV prophylaxis and median follow-up of 4.0 years, patient and graft survival were similar: 100% versus 85% in HBV mono- versus coinfected patients (p = 0.08, log rank test). LT is effective for HIV-HBV coinfected patients with complications of cirrhosis, including those who are HBV DNA positive at the time of LT. Combination HBIG and antivirals is effective as prophylaxis with no clinical evidence of HBV recurrence but low-level HBV DNA is detectable in approximately 50% of recipients.


Assuntos
Antivirais/uso terapêutico , Lamivudina/uso terapêutico , Transplante de Fígado/efeitos adversos , Transplante de Fígado/imunologia , Adulto , Idoso , Antivirais/imunologia , Antivirais/farmacologia , Sobrevivência de Enxerto/imunologia , HIV/genética , HIV/imunologia , Infecções por HIV/tratamento farmacológico , Infecções por HIV/imunologia , Infecções por HIV/virologia , Hepatite/tratamento farmacológico , Hepatite/imunologia , Hepatite/virologia , Hepatite B/tratamento farmacológico , Hepatite B/imunologia , Hepatite B/virologia , Vírus da Hepatite B/genética , Vírus da Hepatite B/imunologia , Humanos , Imunoglobulinas , Síndromes de Imunodeficiência/tratamento farmacológico , Síndromes de Imunodeficiência/imunologia , Infecções/tratamento farmacológico , Infecções/imunologia , Infecções/virologia , Lamivudina/imunologia , Lamivudina/farmacologia , Cirrose Hepática/tratamento farmacológico , Cirrose Hepática/imunologia , Cirrose Hepática/cirurgia , Falência Hepática/tratamento farmacológico , Falência Hepática/imunologia , Falência Hepática/virologia , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Prevenção Secundária , Resultado do Tratamento , Viroses/tratamento farmacológico , Viroses/imunologia , Viroses/virologia , Vírus/genética , Vírus/imunologia
15.
Am J Transplant ; 9(2): 301-8, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19120082

RESUMO

Living donor liver transplantation (LDLT) may have better immunological outcomes compared to deceased donor liver transplantation (DDLT). The aim of this study was to analyze the incidence of acute cellular rejection (ACR) after LDLT and DDLT. Data from the adult-to-adult living donor liver transplantation (A2ALL) retrospective cohort study on 593 liver transplants done between May 1998 and March 2004 were studied (380 LDLT; 213 DDLT). Median LDLT and DDLT follow-up was 778 and 713 days, respectively. Rates of clinically treated and biopsy-proven ACR were compared. There were 174 (46%) LDLT and 80 (38%) DDLT recipients with >/=1 clinically treated episodes of ACR, whereas 103 (27%) LDLT and 58 (27%) DDLT recipients had >/=1 biopsy-proven ACR episode. A higher proportion of LDLT recipients had clinically treated ACR (p = 0.052), but this difference was largely attributable to one center. There were similar proportions of biopsy-proven rejection (p = 0.97) and graft loss due to rejection (p = 0.16). Longer cold ischemia time was associated with a higher rate of ACR in both groups despite much shorter median cold ischemia time in LDLT. These data do not show an immunological advantage for LDLT, and therefore do not support the application of unique posttransplant immunosuppression protocols for LDLT recipients.


Assuntos
Seleção do Doador , Rejeição de Enxerto/epidemiologia , Transplante de Fígado/métodos , Doadores Vivos , Doadores de Tecidos , Doença Aguda , Estudos de Coortes , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
16.
Am J Transplant ; 8(2): 355-65, 2008 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-18093266

RESUMO

Improvements in human immunodeficiency virus (HIV)-associated mortality make it difficult to deny transplantation based upon futility. Outcomes in the current management era are unknown. This is a prospective series of liver or kidney transplant recipients with stable HIV disease. Eleven liver and 18 kidney transplant recipients were followed for a median of 3.4 years (IQR [interquartile range] 2.9-4.9). One- and 3-year liver recipients' survival was 91% and 64%, respectively; kidney recipients' survival was 94%. One- and 3-year liver graft survival was 82% and 64%, respectively; kidney graft survival was 83%. Kidney patient and graft survival were similar to the general transplant population, while liver survival was similar to the older population, based on 1999-2004 transplants in the national database. CD4+ T-cell counts and HIV RNA levels were stable; and there were two opportunistic infections (OI). The 1- and 3-year cumulative incidence (95% confidence intervals [CI]) of rejection episodes for kidney recipients was 52% (28-75%) and 70% (48-92%), respectively. Two-thirds of hepatitis C virus (HCV)-infected patients, but no patient with hepatitis B virus (HBV) infection, recurred. Good transplant and HIV-related outcomes among kidney transplant recipients, and reasonable outcomes among liver recipients suggest that transplantation is an option for selected HIV-infected patients cared for at centers with adequate expertise.


Assuntos
Infecções por HIV/complicações , Transplante de Rim/estatística & dados numéricos , Transplante de Fígado/estatística & dados numéricos , Adulto , Terapia Antirretroviral de Alta Atividade , Contagem de Linfócito CD4 , Cadáver , Feminino , Seguimentos , Rejeição de Enxerto/epidemiologia , Infecções por HIV/tratamento farmacológico , Humanos , Transplante de Rim/imunologia , Transplante de Fígado/imunologia , Doadores Vivos , Masculino , Pessoa de Meia-Idade , Fatores de Tempo , Doadores de Tecidos/estatística & dados numéricos , Resultado do Tratamento , Carga Viral
17.
Transplant Proc ; 50(5): 1413-1423, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29880364

RESUMO

BACKGROUND: Racial differences in post-liver transplantation (LT) outcomes are identified in predominantly male cohorts. Despite known sex differences in a spectrum of liver-related outcomes, it is not known how race influences graft outcomes in women. METHODS: Using the Scientific Registry of Transplant Recipients, we examined race and ethnicity and graft loss (death or retransplant) in women transplanted from 2002 to 2012. Covariates included recipient and donor characteristics, socioeconomics, and medical comorbidities. RESULTS: The eligible cohort (n = 15,860) included 11,051 Caucasians, 2171 Hispanics, 1876 African Americans (AAs), and 762 Asian women with median follow-up of 3.1 years. Five-year graft survival was lower in AA women (60%) compared with Caucasians (71%), Hispanics (70%), and Asians (73%) (P < .001). Graft loss was 45% higher among AA women <40 years at transplant compared with AA women aged 50 to 59 (hazard ratio 1.45, 95% confidence interval 1.17-1.81) and aged 60 to 69 years (hazard ratio 1.33, 95% confidence interval 1.03-1.71), and risk increased after age 60 among Caucasians (P < .001 for race-age interactions). Increased graft loss among young AA women was limited to the first 2 years post-LT (P = .002). CONCLUSION: Younger AA women are at particularly high risk for graft loss, which predominates in the first 2 years post-LT. Prospective studies of immunosuppression adherence and pharmacokinetics, particularly in relation to patient age, may help to explain the mechanisms underlying the higher rates of graft loss in younger AA women.


Assuntos
Sobrevivência de Enxerto , Transplante de Fígado/mortalidade , Adulto , Negro ou Afro-Americano , Idoso , Estudos de Coortes , Etnicidade , Feminino , Hispânico ou Latino , Humanos , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Sistema de Registros , Estudos Retrospectivos , Transplantados , População Branca
18.
Aliment Pharmacol Ther ; 47(5): 645-656, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29333665

RESUMO

BACKGROUND: In a 72-week, randomised controlled trial of obeticholic acid (OCA) in non-alcoholic steatohepatitis (NASH), OCA was superior to placebo in improving serum ALT levels and liver histology. OCA therapy also reduced weight. AIMS: Because weight loss by itself can improve histology, to perform a post hoc analysis of the effects of weight loss and OCA treatment in improving clinical and metabolic features of NASH. METHODS: The analysis was limited to the 200 patients with baseline and end-of-treatment liver biopsies. Weight loss was defined as a relative decline from baseline of 2% or more at treatment end. RESULTS: Weight loss occurred in 44% (45/102) of OCA and 32% (31/98) of placebo-treated patients (P = 0.08). The NAFLD Activity score (NAS) improved more in those with than without weight loss in both the OCA- (-2.4 vs -1.2, P<0.001) and placebo-treated patients (-1.2 vs -0.5, P = 0.03). ALT levels also improved in those with vs without weight loss in OCA- (-43 vs -34 U/L, P = 0.12) and placebo-treated patients (-29 vs -10 U/L, P = 0.02). However, among those who lost weight, OCA was associated with opposite effects from placebo on changes in alkaline phosphatase (+21 vs -12 U/L, P<0.001), total (+13 vs -14 mg/dL, P = 0.02) and LDL cholesterol (+18 vs -12 mg/dL, P = 0.01), and HbA1c (+0.1 vs -0.4%, P = 0.01). CONCLUSIONS: OCA leads to weight loss in up to 44% of patients with NASH, and OCA therapy and weight loss have additive benefits on serum aminotransferases and histology. However, favourable effects of weight loss on alkaline phosphatase, lipids and blood glucose seen in placebo-treated patients were absent or reversed on OCA treatment. These findings stress the importance of assessing concomitant metabolic effects of new therapies of NASH. Clinical trial number: NCT01265498.


Assuntos
Peso Corporal/efeitos dos fármacos , Ácido Quenodesoxicólico/análogos & derivados , Hepatopatia Gordurosa não Alcoólica/tratamento farmacológico , Hepatopatia Gordurosa não Alcoólica/metabolismo , Adulto , Fosfatase Alcalina/sangue , Biópsia , Peso Corporal/fisiologia , Ácido Quenodesoxicólico/uso terapêutico , LDL-Colesterol/sangue , Método Duplo-Cego , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Hepatopatia Gordurosa não Alcoólica/patologia , Resultado do Tratamento , Redução de Peso/efeitos dos fármacos
19.
J Clin Invest ; 99(1): 19-23, 1997 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-9011570

RESUMO

Mutations in 11 of the more than 20 keratin intermediate filaments cause several epidermal and oral associated diseases. No disease-associated mutations have been described in keratin 8 or 18 (K8/18) which are the major keratin pair in simple-type epithelia, as found in the liver, pancreas, and intestine. However, transgenic mice that express mutant keratin 18 develop chronic hepatitis, and have an increased susceptibility to drug-induced hepatotoxicity. Also, ectopic expression of epidermal K14 in mouse liver results in chronic hepatitis, and disruption of mouse K8 leads to embryo lethality with extensive liver hemorrhage. We tested if patients with liver disease of unknown cause may harbor mutations in K18. We describe a his127-->leu (H127L) K18 mutation in a patient with cryptogenic cirrhosis that is germline transmitted. The K18 H127L isolated from the liver explant, or after expression in bacteria, showed an altered migration on two-dimensional gel analysis as compared with normal human liver or bacterially expressed K18. Electron microscopy of in vitro assembled K18 H127L and wild type K8 showed an assembly defect as compared with normal K8/18 assembly. Our results suggest that mutations in K18 may be predispose to, or result in cryptogenic cirrhosis in humans.


Assuntos
Queratinas/genética , Cirrose Hepática/genética , Mutação , Mapeamento Cromossômico , Clonagem Molecular , DNA/análise , Eletroforese em Gel Bidimensional , Regulação da Expressão Gênica , Humanos , Microscopia Eletrônica , Mutação Puntual , Polimorfismo Conformacional de Fita Simples
20.
Aliment Pharmacol Ther ; 45(1): 115-126, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27790729

RESUMO

BACKGROUND: Chronic hepatitis C virus therapy in patients with advanced liver disease remains a clinical challenge. HCV-TARGET collects data in patients treated at tertiary academic and community centres. AIM: To assess efficacy of all-oral HCV therapy in advanced liver disease. METHODS: Between December 2013 and October 2014, 240 patients with a MELD score of ≥10 initiated HCV treatment with an all-oral regimen. Data from the 220 patients who completed 12-week follow-up were analysed. RESULTS: Genotype 1 (GT1) patients had higher sustained virological response (SVR) when treated with sofosbuvir plus simeprevir ± ribavirin than with sofosbuvir plus ribavirin (66-74% vs. 54%); GT1b vs GT1a (84% vs. 64%). SVR for GT2 was 72% with sofosbuvir plus ribavirin, while GT3 patients had a substantially lower response (35%). A decrease in MELD score was not clearly related to SVR over the short course of follow-up although some had improvements in MELD score, serum bilirubin and albumin. A predictor of virological response was albumin level while negative predictors were elevated bilirubin level and GT1a. Most patients with GT1 were treated with approximately 12-week duration of sofosbuvir and simeprevir ± ribavirin therapy while GT2 and GT3 patients were treated with approximately 12 and 24 weeks of sofosbuvir plus ribavirin respectively. CONCLUSIONS: All-oral therapies are effective among patients with advanced liver disease with high levels of success in GT2 and GT1b, and may serve to reduce the severity of liver disease after SVR. Treatment for GT3 patients remains an unmet need. Clinical trial number: NCT01474811.


Assuntos
Antivirais/administração & dosagem , Bases de Dados Factuais , Hepatite C Crônica/diagnóstico , Hepatite C Crônica/tratamento farmacológico , Cirrose Hepática/diagnóstico , Cirrose Hepática/tratamento farmacológico , Administração Oral , Adulto , Quimioterapia Combinada , Feminino , Hepacivirus/efeitos dos fármacos , Hepatite C Crônica/epidemiologia , Humanos , Internacionalidade , Cirrose Hepática/epidemiologia , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Ribavirina/administração & dosagem , Simeprevir/administração & dosagem , Sofosbuvir/administração & dosagem
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