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Transplantation

About: Transplantation is a research topic. Over the lifetime, 276584 publications have been published within this topic receiving 7961661 citations.


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Journal ArticleDOI
TL;DR: Therapy is currently directed at treating components of the metabolic syndrome which may also be beneficial for the liver, and a variety of novel targets worthy of testing in animal models of NAFLD and subsequently in pilot studies in humans.

542 citations

Journal ArticleDOI
TL;DR: Compared to standard penetrating keratoplasty, DSEK causes minimal refractive change and provides rapid visual recovery for patients with endothelial dysfunction and significant improvement was noted in mean best spectacle-corrected visual acuity.
Abstract: Purpose To evaluate early visual and refractive outcomes following treatment of corneal endothelial dysfunction with a corneal transplantation technique, Descemet's stripping with endothelial keratoplasty (DSEK). Methods Visual and refractive outcomes of the first 50 consecutive cases of DSEK performed by a single surgeon between December 2003 and July 2004 were analyzed retrospectively. The DSEK technique consisted of stripping Descemet's membrane and endothelium from a recipient cornea and transplanting the posterior stroma and endothelium of a donor cornea through a 5-mm incision. Results Results are reported for 50 eyes in 47 patients (30 women and 17 men). Mean patient age at surgery was 70 +/- 12 years (range: 34 to 89 years). Five eyes were treated for corneal edema or bullous keratopathy and 45 for Fuchs' endothelial dystrophy. Seven eyes were phakic and 43 were pseudophakic. Six months after surgery, mean manifest cylinder was 1.5 +/- 0.94 diopters (D), unchanged from preoperative cylinder of 1.5 +/- 1.0 D. Mean manifest spherical equivalent refraction was 0.15 +/- 1.5 D at 6-month follow-up compared with -0.36 +/- 1.4 D preoperatively (P = .10) At 3- and 6-month follow-up, significant improvement was noted in mean best spectacle-corrected visual acuity compared with the preoperative mean of 20/100 (P = .007). At 6-month follow-up, 31 (62%) eyes refracted to > or = 20/40 and 38 (76%) eyes saw > or = 20/50. Conclusions Compared to standard penetrating keratoplasty, DSEK causes minimal refractive change and provides rapid visual recovery for patients with endothelial dysfunction. This technique maintains the structural integrity of the cornea by preserving the recipient's epithelium, Bowman's layer, and entire stromal thickness.

542 citations

Journal ArticleDOI
01 Nov 1999-Blood
TL;DR: The results emphasize the importance of lineage-specific chimerism analysis to successfully manipulate engraftment after nonmyeloablative allogeneic PBSC transplantation.

542 citations

Journal ArticleDOI
TL;DR: Evidence that in vitro‐expanded fetus‐derived neurosphere cells were able to generate neurons in vivo and improve motor function upon transplantation into an adult rat spinal‐cord‐contusion injury model is presented.
Abstract: Neural progenitor cells, including neural stem cells, are a potential expandable source of graft material for transplantation aimed at repairing the damaged CNS. Here we present the first evidence that in vitro-expanded fetus-derived neurosphere cells were able to generate neurons in vivo and improve motor function upon transplantation into an adult rat spinal-cord-contusion injury model. As the source of graft material, we used a neural stem cell-enriched population that was derived from rat embryonic spinal cord (E14.5) and expanded in vitro by neurosphere formation. Nine days after contusion injury, these neurosphere cells were transplanted into adult rat spinal cord at the injury site. Histological analysis 5 weeks after the transplantation showed that mitotic neurogenesis occurred from the transplanted donor progenitor cells within the adult rat spinal cord, a nonneurogenic region; that these donor-derived neurons extended their processes into the host tissues; and that the neurites formed synaptic structures. Furthermore, analysis of motor behavior using a skilled reaching task indicated that the treated rats showed functional recovery. These results indicate that in vitro-expanded neurosphere cells derived from the fetal spinal cord are a potential source for transplantable material for treatment of spinal cord injury.

542 citations

Journal ArticleDOI
TL;DR: An alternative approach to reporting international ESRD-relevant data is pursued in the Dialysis Outcomes and Practice Patterns Study (DOPPS), and an extract of the latter is supplied for use and reference by renal care specialists and healthcare administrative bodies.
Abstract: Since the beginning of maintenance therapy for endstage renal disease (ESRD) through dialysis or transplantation, the number of patients treated for terminal kidney failure worldwide has continued to grow at a rate that is far in excess of the growth rate of the general population. By 2001, more than 1 million patients were reported worldwide to receive dialysis treatment alone, with the numbers growing at an annual global average rate of 7% [1,2]. The main factors contributing to the continued growth are the universal ageing of populations, multi-morbidity, higher life-expectancy of treated ESRD patients and increasing access of a generally younger patient population to treatment in countries in which access had previously been limited [3–6]. Solutions targeting the prevention or reversal of renal disease receive widespread attention, but have as yet failed to significantly change the development of global patient numbers. A superior and financially viable alternative to dialysis or allograft transplantation for chronic renal failure is not foreseen for the near or even mid-term future [6–9]. In order to facilitate effective future planning by healthcare authorities, reliable and up-to-date information on ESRD patient numbers, development trends, treatment modalities and treatment outcomes are indispensable. An increasing number of national and international renal registries have provided valuable demographic and epidemiologic information on renal patients since the first report of the European Dialysis and Transplant Association (EDTA) was published in 1965 [6,10–17]. These reports provide a base for comparison between specified patient populations and an understanding of treatment practices and policies and their implications for the well-being of those undergoing treatment for ESRD. The conclusions that can be drawn from such considerations provide knowledge of value to both medical communities and policy makers throughout the world. Even at a national level, data collection and analysis requires extensive resources to enable fast and reliable reporting of the most recent numbers. The collection of records reflecting the situation in a large group of countries presents additional challenges that render timely reporting a difficult target to achieve. A multicountry European database is organized by the ERA/ EDTA, and now consolidates renal replacement information from different renal registries collecting patient data of 27 countries [16]. An alternative approach to reporting international ESRD-relevant data is pursued in the Dialysis Outcomes and Practice Patterns Study (DOPPS). This was initiated in 2002 as an observational study and presently collects information on haemodialysis (HD) practice patterns and their associated outcomes from 12 countries in Europe, North America and Asia [15]. Fresenius Medical Care, the largest dialysis care company worldwide, follows two different and separate approaches, one addressing practice patterns and outcomes in its clinics (e.g. the European Clinical Database, EuClid), and the other using its extensive international network for retrieving and comparing reliable and contemporary ESRD demographic information from 122 countries [2,18]. This article supplies an extract of the latter for use and reference by renal care specialists and healthcare administrative bodies. In addition, trends observed in association with patient demographic data are specified and discussed.

542 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202413
20235,385
202211,558
202110,147
202010,069
201910,460