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1.
San Salvador; MINSAL; ene, 06, 2023. 69 p. ilus.
Não convencional em Espanhol | LILACS, BISSAL | ID: biblio-1411695

RESUMO

En El Salvador las enfermedades crónicas no transmisibles se han incrementado progresivamente en las últimas décadas, actualmente ocupan un lugar relevante en la ocurrencia de morbilidad y mortalidad en la población. El aparecimiento de nuevos casos, sumado a la alta cifra de los ya existentes, ha producido un incremento en la demanda de servicios de salud, tanto de atenciones ambulatorias, como de hospitalizaciones. Como parte esencial de este esfuerzo y con participación de especialistas del MINSAL y del ISSS, se han actualizado los protocolos médicos para el trasplante de riñón que fueron elaborados en el año 2019. EL presente documento contiene la inclusión de nuevos criterios, con los que se ha actualizado el contenido técnico, en relación con los procedimientos médicos que regirán la realización de los procesos de trasplante renal en la red de hospitales del SNIS, involucrados en la donación y trasplante con donantes vivos y que proporcionarán a pacientes que los reciban, la oportunidad de una mejor calidad de vida


In El Salvador, chronic noncommunicable diseases have increased progressively in recent decades, currently occupying a relevant place in the occurrence of morbidity and mortality in the population. The appearance of new cases, added to the high number of existing ones, has produced an increase in the demand for health services, both for outpatient care and hospitalizations. As an essential part of this effort and with the participation of MINSAL and ISSS specialists, the medical protocols for kidney transplantation that were prepared in 2019 have been updated. This document contains the inclusion of new criteria, with which has updated the technical content, in relation to the medical procedures that will govern the performance of kidney transplant processes in the SNIS network of hospitals, involved in donation and transplantation with living donors and that will provide patients who receive them, the opportunity of a better quality of life


Assuntos
Transplante de Rim , Guias como Assunto , Doadores Vivos , Transplantes , Doações , El Salvador , Assistência Ambulatorial
2.
Curr Opin Cardiol ; 38(2): 130-135, 2023 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-36598449

RESUMO

PURPOSE OF REVIEW: Despite advances in the technology of mechanical circulatory support, the need for heart transplantation continues to grow. The longevity of heart transplants continues to be superior to mechanical solutions, though the short-term differences are shrinking. In this review, we cover three timely developments and summarize the recent literature. RECENT FINDINGS: After stagnant rates of heart transplant activity for some years, recently, transplant volume has increased. The developments that have ignited interest have been the use of hepatitis C infected donors, which can now be safely transplanted with the advent of curative oral regimens, and the worldwide use of donors following withdrawal of life support as opposed to traditional brain death donors. In addition, the recent experience of human cardiac xenotransplantation has been very exciting, and though it is not of clinical utility yet, it holds the promise for a virtually unlimited supply of organs at some time in the future. SUMMARY: Much work remains to be done, but together, all three of these developments are exciting and important to be aware of in the future. Each will contribute to additional donors for human heart transplantation and hopefully will alleviate suffering and death on the waiting list.


Assuntos
Transplante de Coração , Transplantes , Humanos , Doadores de Tecidos , Coração
3.
Am J Transplant ; 23(1): 5-10, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36695621

RESUMO

The Organ Procurement and Transplantation Network, an arm of the Health Resources and Services Administration, has a contract with the United Network for Organ Sharing since 1986 to provide central oversight of organ donation and transplants in the United States. The United Network for Organ Sharing has recently come under scrutiny, prompting a review by the National Academies of Sciences, Engineering, and Medicine as summarized in its recent report and also by the US Senate Finance Committee. The national news services have opined about organ donation ethics, access to transplantation particularly for medically underserved populations, and management of organ transplantation data. These critiques raise important concerns that deserve our best response as a transplant community. Broadly, we suggest that the data management approach of the Organ Procurement and Transplantation Network be replaced with a patient-centric omnichannel network in which all donor and recipient data exist in a single longitudinal record that can be used by all applications. A more comprehensive and standardized approach to donor data collection would drive quality improvement across organ procurement organizations and help address inequities in transplantation. Finally, a substantial increase in organ donation would be prompted by considering organ donors as a public health resource, meriting transparent publicly available data collection with respect to organ donor referral, screening, and management.


Assuntos
Transplante de Órgãos , Obtenção de Tecidos e Órgãos , Transplantes , Humanos , Estados Unidos , Doadores de Tecidos , United States Health Resources and Services Administration
5.
World J Surg Oncol ; 21(1): 10, 2023 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-36647096

RESUMO

BACKGROUND: Donor-recipient diameter discrepancy can be problematic when using an autologous great saphenous vein graft for internal jugular vein reconstruction. A triple-paneled method of saphenous vein grafting is one solution. CASE PRESENTATION: A 54-year-old man with a thyroid papillary carcinoma underwent total thyroidectomy and bilateral neck dissection. An 8-cm segment of the right internal jugular vein was resected. For reconstruction, a 30-cm segment of the great saphenous vein was harvested and divided into three pieces of equal length. After opening each piece longitudinally, they were sutured together in a side-by-side fashion to create a cylinder that was used to reconstruct the internal jugular vein defect. The graft was patent 10 months after the surgery. CONCLUSION: The triple-paneled method is feasible for autologous great saphenous vein graft reconstruction of the internal jugular vein.


Assuntos
Veias Jugulares , Transplantes , Masculino , Humanos , Pessoa de Meia-Idade , Veias Jugulares/cirurgia , Veia Safena/transplante , Esvaziamento Cervical , Tireoidectomia
6.
Comput Methods Programs Biomed ; 228: 107253, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36434962

RESUMO

BACKGROUND AND OBJECTIVE: The application of wedge-shaped bone grafts can increase the biomechanical stability of knee during the medial open-wedge high tibial osteotomy (MOWHTO) by reducing the von Mises stress of the medial plate and lateral cortical hinge area. However, the optimal position of bone grafts it remains unclear, so we aimed to determine search for the optimal position of the bone grafts in MOWHTO by using finite element analysis. METHODS: In the finite element analysis, MOWHTO models were established with three different osteotomy distraction heights and assembled into four groups according to different conditions, including the no bone grafts (NBG) group, the anterior bone grafts (ABG) group, the middle bone grafts (MBG) group, and the posterior bone grafts (PBG) group. Based on previous studies, 600 N and 1800 N loads were applied to the knee joint to simulate the static forces during a double and single leg stance to measure the von Mises stress of the medial implant area and lateral hinge area, the maximum displacement of different models, the relative displacement of the osteotomy area and the stress distribution in the bone grafts. RESULTS: Compared to the NBG and ABG groups, the stress of the lateral cortical hinge area and the medial implate area was significantly lower in the PBG group. For example, under the 600N force load, when the height of the osteotomy area was 10 mm, 15 mm, and 20 mm, the maximum von Mises stress of the medial implate area and lateral cortical hinge area in the NBG group were 140, 141, 172, and 53, 57, 60 MPa, respectively. Compared with the NBG group, the maximum von Mises stress of the medial implate area and lateral cortical hinge area in the PBG group were reduced by 45%, 56%, 63% and 14%, 39%, 68% at distraction height of 10 mm, 15 mm, and 20 mm, respectively. The bone grafts in the posterior parts provide the best stability,with the stress of the middle and posterior bone grafts are mainly concentrated in the edge. CONCLUSIONS: The posterior part of the osteotomy area is the best position for bone graft placement since it provides optimal stability and reduces von Mises stress in the medial plate and lateral cortex hinge area, with the stress of the posterior bone grafts mainly concentrated in the edge. These findings guide bone graft placement sites in clinical surgery and are a basis for future research on bone graft materials and structures in MOWHTO.


Assuntos
Placas Ósseas , Osteoartrite do Joelho , Osteotomia , Tíbia , Análise de Elementos Finitos , Transplantes , Osteoartrite do Joelho/cirurgia , Articulação do Joelho/cirurgia , Tíbia/cirurgia
7.
Am J Transplant ; 22 Suppl 4: 38-44, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36453707

RESUMO

Chronic active antibody-mediated rejection (caAMR) in kidney transplantation is a major cause of late graft loss and despite all efforts to date, there is no proven effective therapy. Indeed, the Transplant Society (TTS) consensus opinion called for a conservative approach optimizing baseline immunosuppression and supportive care focused on blood pressure, blood glucose, and lipid control. This review provides the rationale and early evidence in kidney transplant recipients with caAMR that supported the design of the IMAGINE study whose goal is to evaluate the potential impact of targeting the IL6/IL6R pathway.


Assuntos
Transplante de Rim , Transplantes , Humanos , Transplante de Rim/efeitos adversos , Anticorpos , Transplantados , Terapia de Imunossupressão
8.
Int J Mol Sci ; 23(24)2022 Dec 16.
Artigo em Inglês | MEDLINE | ID: mdl-36555651

RESUMO

Mesenchymal stem cells (MSCs) are next-generation treatment in degenerative diseases. For the application of mesenchymal stem cell therapy to degenerative disease, transplantation conditions (e.g., optimized dose, delivery route and regenerating efficacy) should be considered. Recently, researchers have studied the mode of action of MSC in the treatment of ovarian degenerative disease. However, the evidence for the optimal number of cells for the developing stem cell therapeutics is insufficient. The objective of this study was to evaluate the efficacy in ovarian dysfunction, depends on cell dose. By intraovarian transplantation of low (1 × 105) and high (5 × 105) doses of placenta-derived mesenchymal stem cells (PD-MSCs) into thioacetamide (TAA)-injured rats, we compared the levels of apoptosis and oxidative stress that depend on different cell doses. Apoptosis and oxidative stress were significantly decreased in the transplanted (Tx) group compared to the non-transplanted (NTx) group in ovarian tissues from TAA-injured rats (* p < 0.05). In addition, we confirmed that follicular development was significantly increased in the Tx groups compared to the NTx group (* p < 0.05). However, there were no significant differences in the apoptosis, antioxidant or follicular development of injured ovarian tissues between the low and high doses PD-MSCs group. These findings provide new insights into the understanding and evidence obtained from clinical trials for stem cell therapy in reproductive systems.


Assuntos
Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais , Doenças Ovarianas , Transplantes , Humanos , Feminino , Ratos , Animais
9.
Transpl Int ; 35: 10970, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36530482
10.
An. Fac. Cienc. Méd. (Asunción) ; 55(3): 64-70, 20221115.
Artigo em Espanhol | LILACS | ID: biblio-1401554

RESUMO

Introducción: La artroplastia total de cadera de revisión junto con la utilización de injerto óseo cadavérico de banco de tejidos es una alternativa de tratamiento eficaz ante los procedimientos de reemplazo con déficit óseo femoral o acetabular. El presente estudio, analizó los resultados post operatorios en pacientes intervenidos quirúrgicamente en el Hospital de Clínicas. Materiales y métodos: Estudio descriptivo. Muestreo no probabilístico de casos consecutivos atendidos en la Cátedra de Ortopedia y Traumatología de la Facultad de Ciencias Médicas (U.N.A). Fueron captados pacientes con indicación de artroplastia total de cadera de revisión (ATCR) más injerto óseo cadavérico de banco de tejidos, entre diciembre 2017 - octubre 2020, previo consentimiento informado. Se relevaron datos cuya caracterización fue posible mediante un instrumento establecido previamente, ingresado en base Excel. Resultados: 12 pacientes con déficit óseo femoral y acetabular han sido tratados con artroplastia total de cadera de revisión más injerto óseo cadavérico de banco de tejidos, en donde además de la funcionalidad y a través de seguimientos radiológicos se ha determinado la osteointegración total de los aloinjertos. La relación masculino-femenina fue 1/1, siendo el diagnóstico preoperatorio para la colocación de la prótesis de revisión más injerto óseo cadavérico de banco de tejidos el aflojamiento séptico en un 75%. El motivo de consulta más frecuente fue dolor y la secreción y el tiempo quirúrgico fue en promedio de 116 minutos. Conclusión: La artroplastia total de cadera de revisión más aloinjerto presenta óptimos resultados en relación a la osteointegración total y funcionalidad.


Introduction: Revision total hip arthroplasty with use of cadaveric bone graft is an effective treatment for replacement procedures in patients with bone loss femoral or acetabular. The present study analyzed the postoperative results in patients who underwent surgery at the Hospital de Clínicas. Materials and methods: Descriptive study. Non-probabilistic sampling of consecutive cases treated at the Department of Orthopedics and Traumatology of Hospital de Clínicas. Data of patients with indication for revision total hip arthroplasty plus cadaveric bone graft from a tissue bank with prior informed consent,were analyzed between December 2017 and October 2020. Results: 12 patients with femoral and acetabular bone deficits have been treated with revision total hip arthroplasty plus cadaveric bone graft from a tissue bank. A radiological and functional follow up was made. The male-female ratio was 1/1, with the preoperative diagnosis for placement of the revision prosthesis plus cadaveric bone graft,from the tissue bank,was septic loosening in 75%. The most frequent symptom was pain, all revision total hip arthroplasties were performed through a posterior approach, and the surgical time was an average of 116 minutes,using a later approach in all cases.Two intraoperative fracture was presented, and were resolved. Conclusion: Revision total hip arthroplasty plus allograft presents optimal results in relation to total osseointegration and functionality.


Assuntos
Transplantes , Bancos de Tecidos , Tecidos , Traumatologia , Quadril
11.
Kidney360 ; 3(10): 1754-1762, 2022 10 27.
Artigo em Inglês | MEDLINE | ID: mdl-36514724

RESUMO

Background: The coronavirus disease 2019 (COVID-19) pandemic created unprecedented challenges for solid organ transplant centers worldwide. We sought to assess an international perspective on COVID-19 vaccine mandates and rationales for or against mandate policies. Methods: We administered an electronic survey to staff at transplant centers outside the United States (October 14, 2021-January 28, 2022) assessing the reasons cited by transplant centers for or against implementing a COVID-19 vaccine mandate. Each responding center was represented once in the analysis. Results: Respondents (N=90) represented 27 countries on five continents. Half (51%) of responding transplant center representatives reported implementing a COVID-19 vaccine mandate, 38% did not, and 12% were unsure. Staff at centers implementing a vaccine mandate cited efficacy of pretransplant vaccination versus post-transplant vaccination, importance for public health, and minimizing exposure of other patients as rationale for the mandate. Of centers with a mandate, the majority (81%) of the centers mandate vaccination regardless of prior SARS-CoV-2 infection status and regardless of prevaccination spike-protein antibody titer or other markers of prior infection. Only 27% of centers with a vaccine mandate for transplant candidates also extended a vaccine requirement to living donor candidates. Centers not implementing a vaccine mandate cited concerns for undue pressure on transplant candidates, insufficient evidence to support vaccine mandates, equity, and legal considerations. Conclusions: The approach to pretransplant COVID-19 vaccination mandate policies at international transplant centers is heterogeneous. International transplant centers with a vaccine mandate were more willing to extend vaccine requirements to candidates' support persons, cohabitants, and living donors. Broader stakeholder engagement to overcome vaccine hesitancy across the world is needed to increase the acceptance of pretransplant COVID-19 vaccination to protect the health of transplant patients.


Assuntos
COVID-19 , Transplantes , Humanos , Vacinas contra COVID-19/uso terapêutico , COVID-19/epidemiologia , SARS-CoV-2 , Vacinação
12.
JAMA Netw Open ; 5(12): e2248800, 2022 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-36576741

RESUMO

This qualitative study summarizes newspaper reporting on views supporting or opposing policies requiring COVID-19 vaccination for organ transplant candidates in the US, the UK, and Canada.


Assuntos
COVID-19 , Transplante de Órgãos , Transplantes , Humanos , Vacinas contra COVID-19/uso terapêutico , COVID-19/prevenção & controle , Vacinação
13.
Transpl Int ; 35: 10905, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36388424
14.
Laryngoscope ; 132(12): 2301-2306, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36370085

RESUMO

OBJECTIVES/HYPOTHESIS: Reconstruction of mucosal defects using free mucosal grafts has become a common procedure during endoscopic sinus surgery. Epithelialization of mucosal grafts affects postoperative complications and outcomes, which could be influenced by different recipient tissue. However, morphological changes occurring in the grafts transplanted over different tissues remain unexplored. STUDY DESIGN: An animal study. METHODS: Free mucoperichondrial grafts were prepared from the nasal septum of rabbits; the cartilage group had reconstruction on the nasal septal cartilage, and the perichondrium group had reconstruction on the contralateral perichondrium. The nasal septum was removed after 1 and 4 weeks of reconstruction, and the graft was histologically evaluated. RESULTS: After 1 week of reconstruction, the mucosal epithelium of grafts in the cartilage group disappeared, whereas the columnar epithelium of grafts was preserved in the perichondrium group. After 4 weeks of reconstruction, the mucosal defect site was covered with mucosal epithelium in both groups. However, while squamous epithelium was mostly observed in the cartilage group, columnar epithelium containing the healthy ciliary and goblet cells was observed in the perichondrium group. Statistically significant differences were detected in the parameters of epithelial morphology between the two groups, which were higher in the perichondrium group. CONCLUSIONS: In the reconstruction of mucosal defects using free mucosal grafts, difference in recipient tissue affects the graft epithelial morphology. LEVEL OF EVIDENCE: NA Laryngoscope, 132:2301-2306, 2022.


Assuntos
Septo Nasal , Transplantes , Animais , Coelhos , Septo Nasal/transplante , Endoscopia , Cartilagem , Mucosa Nasal/transplante
15.
Pediatr Transplant ; 26(8): e14398, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36377325

RESUMO

OBJECTIVE: This document is designed to outline the definition, pathogenesis, diagnostic modalities and therapeutic measures to treat antibody-mediated rejection in children postheart transplant METHODS: Literature review was conducted by a Pediatric Heart Transplant Society (PHTS) working group to identify existing pediatric and adult studies on antibody-mediated rejection (AMR). In addition, the centers participating in PHTS were asked to submit their approach to diagnosis and management of pediatric AMR. This document synthesizes information gathered from both these sources to highlight a practical approach to diagnosing and managing a child with AMR postheart transplant. This document may not represent the practice at all centers in the PHTS and serves as a starting point to understand an approach to this clinical scenario.


Assuntos
Transplante de Coração , Transplantes , Humanos , Criança , Adulto , Rejeição de Enxerto/diagnóstico , Rejeição de Enxerto/patologia , Anticorpos
16.
Curr Opin Organ Transplant ; 27(4): 337-345, 2022 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-36354260

RESUMO

PURPOSE OF REVIEW: In spite of substantial technical improvements and conceptual revolutions in advanced liver surgery, there are still straitened circumstances that pose difficulties for in-situ liver resections. Ex-vivo liver resection and autotransplantation (ELRA) is a hybrid technique combining experiences from conventional liver surgery and liver transplantation. This technique is becoming more comprehensive and popular among leading centers recently. RECENT FINDINGS: Short-term and long-term outcomes are now the focus of the technique after more than a decade of cumulative progress and technical evolution. As the 5-year survival nowadays reaches over 80%, this technique is believed to be beneficial for advanced tumors. In recent years, ELRA has been applied by more centers on larger scales, and the learning curve was set at 53 cases. Progresses in disease selection, surgical indications, individualized outflow reconstruction, or autograft implantation, management of co-morbidities (e.g., Budd-Chiari syndrome, caval and/or neighboring organ involvements, obstructive jaundice) propelled the development of the technique. SUMMARY: This hybrid liver surgery will benefit for carefully selected patients presented with advanced benign diseases and well-differentiated malignancies.


Assuntos
Transplante de Fígado , Transplantes , Humanos , Transplante de Fígado/efeitos adversos , Transplante de Fígado/métodos , Transplante Autólogo , Hepatectomia/efeitos adversos , Hepatectomia/métodos , Fígado
17.
J Am Soc Nephrol ; 33(12): 2293-2305, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36450598

RESUMO

BACKGROUND: In single-center studies, HLA-DQ mismatches stimulate the most pathogenic donor-specific antibodies. However, because of limitations of transplant registries, this cannot be directly confirmed with registry-based analyses. METHODS: We evaluated patients in the Scientific Registry of Transplant Recipients who were relisted after renal graft failure with new, unacceptable antigens corresponding to the HLA typing of their previous donor (UA-PD) as a proxy for donor-specific antibodies. Linear regression was applied to estimate the effects of HLA mismatches on UA-PD and the effects of UA-PD on calculated panel reactive antibody (cPRA) values for 4867 kidney recipients from 2010 to 2021. RESULTS: Each additional HLA-DQ mismatch increased the probability of UA-PD by 25.2% among deceased donor transplant recipients and by 28.9% among living donor transplant recipients, significantly more than all other HLA loci (P<0.05). HLA-DQ UA-PD increased cPRA by 29.0% in living donor transplant recipients and by 23.5% in deceased donor transplant recipients, significantly more than all loci except for HLA-A in deceased donor transplant recipients (23.1%). African American deceased donor transplant recipients were significantly more likely than Hispanic and White recipients to develop HLA-DQ UA-PD; among living donor transplant recipients, African American or Hispanic recipients were significantly more likely to do so compared with White recipients. Models evaluating interactions between HLA-DR/DQ mismatches revealed largely independent effects of HLA-DQ mismatches on HLA-DQ UA-PD. CONCLUSIONS: HLA-DQ mismatches had the strongest associations with UA-PD, an effect that was greatest in African American and Hispanic recipients. cPRA increases with HLA-DQ UA-PD were equivalent or larger than any other HLA locus. This suggests a need to consider the effects of HLA-DQ in kidney allocation.


Assuntos
Transplantes , Humanos , Transplantados , Anticorpos , Doadores Vivos , Antígenos HLA-DQ/genética
18.
Med. clín (Ed. impr.) ; 159(9): 411-419, noviembre 2022. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-212234

RESUMO

Introduction: The main advantages of haploidentical hematopoietic stem cell transplantation (haplo-HSCT) are the immediate availability of donors, the possibility of developing cell therapy approaches with different novel transplant platforms, and the procedure's cost savings.MethodologyWe retrospectively analyzed the pediatric haplo-HSCT activity of the Spanish hematopoietic stem-cell transplantation group (GETH) between 1999 and 2016, aiming to study clinical characteristics and outcomes by describing patient groups with non-malignant disease (NMD) or malignant disease (MD) and the impact of 2 different periods (1999–2009 and 2010–2016) on long-term outcomes.ResultsTwelve centers performed 232 haplo-HSCTs in 227 children, representing 10% of all pediatric allogeneic HSCT activity in Spain from 1999 to 2016, with a notable increase since 2013. Most haplo-HSCTs (86.7%) were performed in patients with MD; 95% received peripheral blood stem cells from donors, and 78.9% received ex vivo T-cell depleted grafts. Non-manipulated grafts using post-transplantation cyclophosphamide have been incorporated since 2012. We observed a higher percentage of graft failure in NMD versus MD (32% vs. 15.6%; p=0.029). Relapse and transplant-related mortality were the procedure's main limitations in MD and NMD, respectively. Five-year overall survival was 48.5% (SE 3.9), with no statistically significant difference when comparing the MD and NMD cohorts. Patients who received previously a HSCT the overall survival was significantly decreased. We observed no survival improvement over time.ConclusionsAlthough haplo-HSCT is an increasingly employed treatment option, our patients’ results need improvement. We need to develop reference centers, especially for NMD whose rarity makes it difficult to gain experience. (AU)


Introducción: Las principales ventajas del trasplante de progenitores hematopoyéticos de donante haploidéntico (haplo-TPH) son la disponibilidad inmediata de donantes, la posibilidad de desarrollar terapia celular postrasplante y el ahorro de costes al obviar el proceso de búsqueda de donante.MetodologíaAnalizamos retrospectivamente la actividad haplo-TPH en población pediátrica del grupo español de trasplante hematopoyético (GETH) entre 1999 y 2016, con el objetivo de estudiar las características clínicas y los resultados mediante la descripción de grupos de pacientes con enfermedad no malignas (ENM) o enfermedad maligna (EM) y el impacto de dos períodos diferentes (1999-2009 y 2010-2016) en los resultados a largo plazo.ResultadosDoce centros realizaron 232 haplo-TPH en 227 niños, lo que representa el 10% de toda la actividad de TPH alogénicos pediátricos en España entre 1999-2016, con un aumento notable desde 2013. La mayoría de los haplo-TPH (86,7%) se realizaron en pacientes con EM; el 95% recibió progenitores hematopoyéticos de sangre periférica y el 78,9% recibió injertos con purgado de células T ex vivo. Los injertos no manipulados con ciclofosfamida postrasplante se realizaron a partir de 2012. Observamos un mayor porcentaje de fallos del injerto en la ENM que en la EM (32% frente a 15,6%; p=0,029). La recaída y la mortalidad relacionada con el trasplante fueron las principales limitaciones del procedimiento en la EM y la ENM, respectivamente. La supervivencia global a cinco años fue del 48,5% (EE 3,9), sin diferencias estadísticamente significativas al comparar las cohortes con EM y ENM. En los pacientes que recibieron previamente un TPH, la supervivencia global se redujo significativamente. No observamos mejoría en la supervivencia a lo largo del tiempo. (AU)


Assuntos
Humanos , Criança , Ciclofosfamida/uso terapêutico , Transplante de Células-Tronco Hematopoéticas , Doadores de Tecidos , Transplantes , Estudos Retrospectivos
19.
Am J Transplant ; 22(10): 2287-2288, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36196493
20.
Nat Rev Nephrol ; 18(12): 745-761, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36198911

RESUMO

A major limitation of organ allotransplantation is the insufficient supply of donor organs. Consequently, thousands of patients die every year while waiting for a transplant. Progress in xenotransplantation that has permitted pig organ graft survivals of years in non-human primates has led to renewed excitement about the potential of this approach to alleviate the organ shortage. In 2022, the first pig-to-human heart transplant was performed on a compassionate use basis, and xenotransplantation experiments using pig kidneys in deceased human recipients provided encouraging data. Many advances in xenotransplantation have resulted from improvements in the ability to genetically modify pigs using CRISPR-Cas9 and other methodologies. Gene editing has the capacity to generate pig organs that more closely resemble those of humans and are hence more physiologically compatible and less prone to rejection. Despite such modifications, immune responses to xenografts remain powerful and multi-faceted, involving innate immune components that do not attack allografts. Thus, the induction of innate and adaptive immune tolerance to prevent rejection while preserving the capacity of the immune system to protect the recipient and the graft from infection is desirable to enable clinical xenotransplantation.


Assuntos
Obtenção de Tecidos e Órgãos , Transplantes , Humanos , Animais , Suínos , Transplante Heterólogo/métodos , Sobrevivência de Enxerto , Primatas , Rejeição de Enxerto
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