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Soares ME, Costa G, Guerra L, Morais MC, Vaz N, Codes L, Bittencourt PL. Influence of Tacrolimus Intrapatient Variability on Allograft Rejection Frequency and Survival Following Liver Transplantation. Ther Drug Monit 2024:00007691-990000000-00202. [PMID: 38648652 DOI: 10.1097/ftd.0000000000001192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 01/26/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Tacrolimus is the primary calcineurin inhibitor used in immunosuppressive regimens to prevent allograft rejection (AR) after organ transplantation. Recent studies have linked intrapatient variability (IPV) of tacrolimus with AR occurrence and reduced survival, especially in kidney transplant recipients. However, limited data are available on the impact of tacrolimus IPV on adverse outcomes after liver transplantation (LT). AIMS The aim of this study was to assess the association between tacrolimus IPV using various methodologies with acute AR and long-term patient survival after LT. METHODS All patients who underwent LT from January 2010 to July 2021 were retrospectively evaluated. Tacrolimus IPV was calculated for each patient using the mean and SD, mean absolute deviation (MAD), coefficient of variation (CV), and time in therapeutic range (TTR). These measures were then compared with AR within the first 24 months after LT and to long-term survival. RESULTS Out of 234 patients, 32 (13.7%) developed AR and 183 (78.2%) survived, with a mean follow-up of 101 ± 43 months. Tacrolimus IPV, assessed by mean, SD, MAD, and CV, was 8.3 ± 2.1, 2.7 ± 1.3, 32.0% ± 11.7%, and 39.4% ± 15.4%, respectively. There was no statistically significant correlation between Tacrolimus IPV and AR or survival post-LT. CONCLUSIONS In a large cohort of patients from diverse racial backgrounds, tacrolimus IPV was not associated with clinically relevant outcomes such as AR and survival after LT.
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Affiliation(s)
| | - Gabriela Costa
- Bahiana School of Medicine and Public Health, Salvador, Bahia, Brazil; and
| | - Laura Guerra
- Bahiana School of Medicine and Public Health, Salvador, Bahia, Brazil; and
| | - Maria Clara Morais
- Bahiana School of Medicine and Public Health, Salvador, Bahia, Brazil; and
| | - Nayana Vaz
- Unit of Gastroenterology and Hepatology, Portuguese Hospital, Salvador, Bahia, Brazil
| | - Liana Codes
- Bahiana School of Medicine and Public Health, Salvador, Bahia, Brazil; and
- Unit of Gastroenterology and Hepatology, Portuguese Hospital, Salvador, Bahia, Brazil
| | - Paulo Lisboa Bittencourt
- Bahiana School of Medicine and Public Health, Salvador, Bahia, Brazil; and
- Unit of Gastroenterology and Hepatology, Portuguese Hospital, Salvador, Bahia, Brazil
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Morais MC, Soares ME, Costa G, Guerra L, Vaz N, Codes L, Bittencourt PL. Impact of tacrolimus intra-patient variability in adverse outcomes after organ transplantation. World J Transplant 2023; 13:254-263. [PMID: 37746041 PMCID: PMC10514747 DOI: 10.5500/wjt.v13.i5.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/31/2023] [Accepted: 08/11/2023] [Indexed: 09/15/2023] Open
Abstract
Tacrolimus (Tac) is currently the most common calcineurin-inhibitor employed in solid organ transplantation. High intra-patient variability (IPV) of Tac (Tac IPV) has been associated with an increased risk of immune-mediated rejection and poor outcomes after kidney transplantation. Few data are available concerning the impact of high Tac IPV in non-kidney transplants. However, even in kidney transplantation, there is still a controversy whether high Tac IPV is indeed detrimental in respect to graft and/or patient survival. This may be due to different methods employed to evaluate IPV and distinct time frames adopted to assess graft and patient survival in those reports published up to now in the literature. Little is also known about the influence of high Tac IPV in the development of other untoward adverse events, update of the current knowledge regarding the impact of Tac IPV in different outcomes following kidney, liver, heart, lung, and pancreas tran splantation to better evaluate its use in clinical practice.
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Affiliation(s)
- Maria Clara Morais
- School of Medicine, Bahiana School of Medicine and Public Health, Salvador 40290-000, Bahia, Brazil
| | - Maria Eduarda Soares
- School of Medicine, Federal University of Bahia, Salvador 40110-100, Bahia, Brazil
| | - Gabriela Costa
- School of Medicine, Bahiana School of Medicine and Public Health, Salvador 40290-000, Bahia, Brazil
| | - Laura Guerra
- School of Medicine, Bahiana School of Medicine and Public Health, Salvador 40290-000, Bahia, Brazil
| | - Nayana Vaz
- School of Medicine, Bahiana School of Medicine and Public Health, Salvador 40290-000, Bahia, Brazil
- Unit of Gastroenterology and Hepatology, Portuguese Hospital, Salvador 40130-030, Bahia, Brazil
| | - Liana Codes
- School of Medicine, Bahiana School of Medicine and Public Health, Salvador 40290-000, Bahia, Brazil
- Unit of Gastroenterology and Hepatology, Portuguese Hospital, Salvador 40130-030, Bahia, Brazil
| | - Paulo Lisboa Bittencourt
- School of Medicine, Bahiana School of Medicine and Public Health, Salvador 40290-000, Bahia, Brazil
- Unit of Gastroenterology and Hepatology, Portuguese Hospital, Salvador 40130-030, Bahia, Brazil
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Ricciuti B, Arbour K, Lin J, Vajdi A, Tolstorukov M, Hong L, Zhang J, Vokes N, Li Y, Spurr L, Cherniack A, Recondo G, Lamberti G, Rizvi H, Egger J, Plodkowski A, Khosrowjerdi S, Digumarthy S, Vaz N, Park H, Nishino M, Sholl L, Barbie D, Altan M, Heymach J, Skoulidis F, Gainor J, Hellmann M, Awad M. P14.26 Diminished Efficacy of PD-(L)1 Inhibition in STK11- and KEAP1-Mutant Lung Adenocarcinoma is Impacted by KRAS Mutation Status. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.532] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Vaz N, Poon WL, Cheng SS. Persistent hypoglossal artery with a contralateral hypoglossal canal venous lake: a case report. Hong Kong Med J 2019; 25:399-400. [PMID: 31761749 DOI: 10.12809/hkmj177157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023] Open
Affiliation(s)
- N Vaz
- Center for Diagnostic Imaging, Barcelona Clinic Hospital, Barcelona, Spain
| | - W L Poon
- Department of Radiology and Imaging, Queen Elizabeth Hospital, Jordan, Hong Kong
| | - S S Cheng
- Department of Radiology and Imaging, Queen Elizabeth Hospital, Jordan, Hong Kong
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Cunha-Silva M, Mazo D, Arrelaro R, Vaz N, Rabello M, Lopes T, Corrêa B, Torino AB, Cintra M, Lorena S, Sevá-Pereira T, Almeida J. Hand-foot syndrome due to hepatitis C therapy. ACTA ACUST UNITED AC 2018; 64:415-419. [PMID: 30304139 DOI: 10.1590/1806-9282.64.05.415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 08/05/2017] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Direct-acting antivirals are new drugs for chronic hepatitis C treatment. They are usually safe and well tolerated, but can sometimes cause serious adverse effects and there is no consensus on how to treat or prevent them. We described a case of hand-foot syndrome due to hepatitis C virus interferon-free therapy. METHODS We report the case of a 49-year-old man with compensated liver cirrhosis due to chronic hepatitis C genotype 1, treatment-naïve, who started viral treatment with sofosbuvir, simeprevir and ribavirin for 12 weeks. RESULTS At the sixth week of treatment he had anemia, requiring a lower dose of ribavirin. At the tenth week, he had erythematous, pruritic, scaly and flaky lesions on hands and feet, which showed a partial response to oral antihistamines and topical corticosteroids. It was not necessary to discontinue antiviral treatment, but in the first week after the end of treatment, there was worsening of injuries, including signs of secondary infection, that required hospitalization, antibiotics and oral corticosteroid, with progressive improvement. Biopsy of the lesions was consistent with pharmacodermia. The patient had sustained a virological response, despite the side effect. He had a history of pharmacodermia one year ago attributed to the use of topiramate, responsive to oral corticosteroid. CONCLUSION Interferon-free therapies can rarely lead to severe adverse reactions, such as skin lesions. Patients receiving ribavirin combinations and those who had a history of pharmacodermia or skin disease may be more susceptible. There is no consensus on how to prevent skin reactions in these patients.
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Affiliation(s)
- Marlone Cunha-Silva
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Daniel Mazo
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil.,Department of Gastroenterology, University of Sao Paulo School of Medicine (FMUSP), São Paulo, SP, Brasil
| | - Raquel Arrelaro
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Nayana Vaz
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Marcello Rabello
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Tirzah Lopes
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Bárbara Corrêa
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Ana Beatriz Torino
- Department of Dermatology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Maria Cintra
- Department of Dermatology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Sonia Lorena
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Tiago Sevá-Pereira
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
| | - Jazon Almeida
- Department of Gastroenterology, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brasil
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Fernández-Nóvoa D, Gómez-Gesteira M, Mendes R, deCastro M, Vaz N, Dias JM. Influence of main forcing affecting the Tagus turbid plume under high river discharges using MODIS imagery. PLoS One 2017; 12:e0187036. [PMID: 29073209 PMCID: PMC5658172 DOI: 10.1371/journal.pone.0187036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 10/12/2017] [Indexed: 11/20/2022] Open
Abstract
The role of river discharge, wind and tide on the extension and variability of the Tagus River plume was analyzed from 2003 to 2015. This study was performed combining daily images obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor located onboard the Aqua and Terra satellites. Composites were generated by averaging pixels with the same forcing conditions. River discharge shows a strong relation with the extension of the Tagus plume. The plume grows with the increasing river discharge and express a two day lag caused by the long residence time of water within the estuary. The Tagus turbid plume was found to be smaller under northerly and easterly winds, than under southerly and westerly winds. It is suggested that upwelling favoring winds provoke the offshore movement of the plume material with a rapidly decrease in turbidity values whereas downwelling favoring winds retain plume material in the north coast close to the Tagus mouth. Eastern cross-shore (oceanward) winds spread the plume seaward and to the north following the coast geometry, whereas western cross-shore (landward) winds keep the plume material in both alongshore directions occupying a large part of the area enclosed by the bay. Low tides produce larger and more turbid plumes than high tides. In terms of fortnightly periodicity, the maximum plume extension corresponding to the highest turbidity is observed during and after spring tides. Minimum plume extension associated with the lowest turbidity occurs during and after neap tides.
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Affiliation(s)
- D. Fernández-Nóvoa
- EPHYSLAB, Environmental PHYsics LABoratory, Facultad de Ciencias, Universidad de Vigo, Ourense, Spain
- * E-mail:
| | - M. Gómez-Gesteira
- EPHYSLAB, Environmental PHYsics LABoratory, Facultad de Ciencias, Universidad de Vigo, Ourense, Spain
| | - R. Mendes
- CESAM, Physics Department, University of Aveiro, Aveiro, Portugal
| | - M. deCastro
- EPHYSLAB, Environmental PHYsics LABoratory, Facultad de Ciencias, Universidad de Vigo, Ourense, Spain
| | - N. Vaz
- CESAM, Physics Department, University of Aveiro, Aveiro, Portugal
| | - J. M. Dias
- CESAM, Physics Department, University of Aveiro, Aveiro, Portugal
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Castellsagué X, Menéndez C, Loscertales MP, Kornegay JR, dos Santos F, Gómez-Olivé FX, Lloveras B, Abarca N, Vaz N, Barreto A, Bosch FX, Alonso P. Human papillomavirus genotypes in rural Mozambique. Lancet 2001; 358:1429-30. [PMID: 11705494 DOI: 10.1016/s0140-6736(01)06523-0] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We studied the genotype distribution of cervical human papillomavirus (HPV) infections in an age-stratified sample of 262 women in Mozambique using the PGMYO9-PGMY11 primer system in a reverse line-blot strip-based assay with high sensitivity in type-specific amplification. Despite the low precision of the estimates, we found that HPV-16 was not the dominant type. Instead, HPV 35 was the most commonly identified genotype among HPV-positive women (16/96 [17%]) and women with cervical neoplasia (7/23 [30%]). Certain genotypes might have been under-detected in previous studies, and type-specific HPV distributions might vary across populations. Therefore, the estimated proportion of cervical neoplasia that could be prevented by an HPV-16-based vaccine could be lower than expected.
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Abstract
The association between breast-feeding status and maternal health is examined. A survey questionnaire was presented via the World Wide Web. Self-reports of 168 breast-feeding and 65 weaned mothers between 4 and 208 weeks postpartum were compared for physician visits, symptomatology, and Perceived Stress Scale scores in the last month. Breast-feeding was associated with fewer physician visits and symptoms and less perceived stress. Moreover, the longer a woman breast-fed before she weaned, the fewer the symptoms and less stress she reported. Breast-feeding is associated with better maternal health both during the breast-feeding period and after weaning. Further research on the effects on maternal health of breast-feeding is indicated. Future prospective longitudinal investigations should address the possible inhibition of lactation by stress and physiological mechanisms that may link breast-feeding and weaning with maternal health.
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Vaz N. [Teaching and health: a biological view]. CAD SAUDE PUBLICA 1999; 15 Suppl 2:169-76. [PMID: 10578088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
Living systems are structure determined systems. Teaching is never feasible, but learning is inevitable, a comment by an observer about some aspect of the constant changes occurring while life goes on. Teachers are all those who open up spaces for conviviality and allow congruent changes to take place. There are no instructive interactions in nature. Health and the biology of living systems are phenomena studied in different domains. What is healthy or unhealthy for humans, is defined by human culture. As biological phenomena, health and disease are relational configurations of the organism and its medium. From this perspective, individual health is a social phenomenon.
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Affiliation(s)
- N Vaz
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Alfredo Balena 190, Belo Horizonte, MG 30130-100 Brasil.
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Abstract
Founding studies of cellular immunology emphasized that tolerance to allografts could only be achieved early in the embryonic or neonatal period, suggesting that the establishment of self-tolerance, a main event in the organization of the immune system, would necessarily take place in immature hosts. Contradicting these ideas, oral tolerance is a common, daily phenomenon, easily achieved by a physiological route in adult immunocompetent animals. Furthermore, there is solid evidence that, after the neonatal period, the susceptibility to oral tolerance induction also wanes and that it may be restored by adoptive transfer of cells from young hosts. These findings are briefly reviewed here to emphasize that immunological activity is a continuous and ongoing epigenesis extending throughout the entire life of the organism, far beyond the early phases of ontogenesis.
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Affiliation(s)
- N Vaz
- Department of Biochemistry and Immunology, ICB, UFMG, Belo Horizonte, Brazil
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Vaz N. The molecular and cellular correlates of immunological phenomena. Contrasting two explanatory pathways. Braz J Med Biol Res 1996; 29:545-53. [PMID: 9033803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Affiliation(s)
- N Vaz
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Vaz N, Carvalho CR. Immunological specificity as metaphor. Braz J Med Biol Res 1993; 26:665-71. [PMID: 8268815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Affiliation(s)
- N Vaz
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
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Abstract
A significant polyclonal activation of B lymphocytes was observed during experimental infection of C57BL/10J mice with Schistosoma mansoni. The isotypic pattern of this expansion, assessed by the Protein-A plaque-forming cell method, was compared with and found to differ from those occurring after infection by Trypanosoma cruzi or injection of bacterial LPS. In the infection of S. mansoni an early expansion of most immunoglobulin isotypes occurs together with a late, sustained expansion of IgG1-secreting cells. High levels of polyclonal B cell activation were observed after adoptive transfer of spleen cells from infected mice to isogenic recipients pre-treated with hydroxyurea.
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Affiliation(s)
- L M Lopes
- Department of Biochemistry and Immunology, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
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Coutinho A, Forni L, Holmberg D, Ivars F, Vaz N. From an antigen-centered, clonal perspective of immune responses to an organism-centered, network perspective of autonomous activity in a self-referential immune system. Immunol Rev 1984; 79:151-68. [PMID: 6235170 DOI: 10.1111/j.1600-065x.1984.tb00492.x] [Citation(s) in RCA: 116] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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