Liver tissues of 12h after brain death donor liver transplantation and matched non-brain death donor liver transplantation.
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PROVIDER: PRJNA490174 | ENA |
REPOSITORIES: ENA
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Project description:To determine the circRNA expression profile in hepar tissues of 12h after brain death donor liver transplantation and matched non-brain death donor liver transplantation, we uesed circRNA microArray analysis form Arraystar to examine the expression of circRNAs and circRNAs in hepar tissues of 12h after brain death donor liver transplantation and matched non-brain death donor liver transplantation.
2020-04-10 | GSE119748 | GEO
Project description:Brain death donor liver is an important organ source for liver transplantation.The liver injury after brain death donor liver transplantation is serious and the mechanism is unknown.In order to explore the role of lncRNAs and circRNAs expression profile and their biological functions in liver injury after brain death and liver transplantation, lncRNA and mRNA microarray expression profile were tested in the liver after brain death and normal liver transplantation.And this study lays a foundation for future studies on the potential role of lncRNAs in liver injury after brain death donor liver transplantation. To determine the LncRNA expression profile in hepar tissues of 12h after brain death donor liver transplantation and matched non-brain death donor liver transplantation, we uesed LncRNA microArray analysis form Arraystar to examine the expression of LncRNAs and circRNAs in hepar tissues of 12h after brain death donor liver transplantation and matched non-brain death donor liver transplantation.
2021-08-06 | GSE118182 | GEO
Project description:LncRNA expression profile in hepar tissues of 12h after brain death or matched non-brain death donor liver transplantation
| PRJNA484774 | ENA
Project description:Deceased kidney donation after brain death (DBD) is the main source of transplants, yet these grafts yield inferior transplant outcomes when compared to living donation. In brain death, cerebral injury contributes to systemic biological dysregulation, causing significant cellular stress in donor kidneys that adversely impacts the quality of grafts. Here, we hypothesized that proteolytic processes in DBD kidneys might lead to podocyte damage with subsequent development of post-transplant dysfunction. Using protein topography and migration analysis platform (PROTOMAP), we mapped degradation profiles of cytoskeletal proteins in DBD kidneys. Cytoskeletal proteolytic degradation was further studied by Immunoblotting on a separate cohort of deceased and living donor kidney biopsies. To investigate potential mechanism of kidney cytoskeletal protein degradation, in-vitro human podocytes and ex-vivo precision-cut human kidney slices were employed. We found novel proteolytic profiles of key podocyte cytoskeletal proteins in donor kidneys associated with suboptimal posttransplant function. These were unique to brain-death and were not observed in circulatory-death or living-donor kidneys. Talin-specific protein degradation in DBD kidneys indicated Calpain-1 activation may have a key role in proteolytic processes observed in the dysfunctional kidneys. Investigation of the underlying mechanism suggests that Transforming-Growth Factor-β (TGFβ) induces Calpain-1 activation, leading to brain-death specific podocyte degradation patterns and dysregulation of actin cytoskeleton; events that were prevented, in-vitro, by Calpain inhibition. Conclusion Our data demonstrate that podocyte protein degradation impacts the quality of DBD kidneys, propose a role of TGFβ mediated Calpain-1 proteolytic processing of cytoskeletal Talin-1, suggesting therapeutic opportunities to prevent kidney dysfunction.
2022-08-12 | PXD022074 | Pride
Project description:Patients with unresectable liver metastases (LM) from colorectal cancer (CRC)have a poor prognosis. In patients with resectable disease, surgery offers a distinct survival benefit. This study will offer live donor liver transplantation (LDLT) to select patients with unresectable metastases that are 1) limited to the liver and 2) stable (non-progressing) on standard chemotherapy. Potential participants will be evaluated for liver transplant suitability and must also have a willing, healthy living donor come forward for evaluation. Those participants who undergo LDLT will be followed for survival, disease-free survival and quality of life for 5 years and compared to a "control group" of participants who drop out of study prior to transplantation due to reasons other than cancer progression.
| 2222218 | ecrin-mdr-crc
Project description:Lung donation after cardiac death (DCD), in contrast to donation after brain death (DBD), is a promising and increasingly common method to help relieve the shortage of donor organs. However, the pathogenetic consequences of retrieved lungs after DCD vs. DBD have not been clarified. We aimed to study the differential gene expression profiles in lungs of DCD and DBD patients.
2009-11-12 | GSE18995 | GEO
Project description:The clear benefits of ischemic preconditioning (IPC) in reducing ischemia reperfusion injury (IRI) remain indistinct in human liver transplantation. To further understand the mechanistic aspects of IPC in human deceased donor liver transplantation (DDLT), we performed microarray analyses to determine global gene expression profiles associated with IPC administration. Donor and recipient characteristics in both groups were comparable. Clinical data from our study subset and larger trial were similar. IPC increased expression of 10 transcripts at either time point with roles in: antioxidant defenses, immunological response, lipid biosynthesis, and xenobiotic metabolism. IPC decreased the expression of 1 cell development related transcript. Conclusions: 1) IPC in DDLT increased the expression of antioxidant transcripts similar to studies in animal IPC, anesthetic, and remote IPC. 2) IPC increased expression of lipogenic transcripts, which may be relevant to the clinically observed increased IRI in our IPC group. 3) Our microarray findings support our clinical observations and are compatible with the varied outcomes of hepatic IPC studies in human liver transplantation.
2009-04-01 | GSE15480 | GEO
Project description:The clear benefits of ischemic preconditioning (IPC) in reducing ischemia reperfusion injury (IRI) remain indistinct in human liver transplantation. To further understand the mechanistic aspects of IPC in human deceased donor liver transplantation (DDLT), we performed microarray analyses to determine global gene expression profiles associated with IPC administration. Donor and recipient characteristics in both groups were comparable. Clinical data from our study subset and larger trial were similar. IPC increased expression of 10 transcripts at either time point with roles in: antioxidant defenses, immunological response, lipid biosynthesis, and xenobiotic metabolism. IPC decreased the expression of 1 cell development related transcript. Conclusions: 1) IPC in DDLT increased the expression of antioxidant transcripts similar to studies in animal IPC, anesthetic, and remote IPC. 2) IPC increased expression of lipogenic transcripts, which may be relevant to the clinically observed increased IRI in our IPC group. 3) Our microarray findings support our clinical observations and are compatible with the varied outcomes of hepatic IPC studies in human liver transplantation. We conducted a nested sub-study in 12/101 subjects enrolled in a prospective randomized trial of 10 min IPC in DDLT during 2003-2006. Liver biopsies were performed at the end of cold storage and at 90 minutes after allograft reperfusion. Six biopsy pairs from both IPC and No IPC (STD) groups within a narrow donor risk index range were selected. Total RNA was extracted and hybridized with Affymetrix GeneChip Human Gene 1.0 ST Array. IPC effects were examined by comparing IPC vs. STD at both time points. Transcripts whose expression changed 2-fold with p<0.05 were considered significant.
2010-05-20 | E-GEOD-15480 | biostudies-arrayexpress
Project description:Nearly one third of patients with colorectal cancer develop liver metastases. It is well known that the achievement of a R0-situation is one of the most important factors for a positive long-term outcome. Despite further advantages in multimodal treatment concepts, only 20 - 30 % of the patients with metastases can be resected in curative intention.
Recent studies, especially from Norway, have shown that liver transplantation might be a feasible option in well selected patients since the complete hepatectomy with subsequent liver transplantation can be an option for the achievement of a R0 situation.
In this study, we pursue the strategy of two-stage hepatectomy combined with a left-lateral living donor liver transplantation.
Inclusion criteria are as follows: non-resectable liver metastases of a primary colorectal carcinoma with an assumed portal-venous drainage of the tumor and at least a "stable disease" after a period of eight weeks systemic chemotherapy. Patients are excluded from the study if there is an extrahepatic tumor burden (with the exception of resectable lung metastases) or if the patient is not suitable for liver transplantation due to co-morbidities.
The transplantation itself will be undertaken as a living donor liver transplantation where the left lateral liver lobe (liver segments 2 & 3) from a healthy volunteer donor will serve as graft. Prior transplantation, a left hemihepatectomy in the recipient is performed and the left lateral graft will be transplanted in this position. At the end of the transplantation procedure, the right portal vein will be closed to induce a rapid growth of the graft. The second step, and therefore the completion of the operation is performed after a growth period of the transplanted left-lateral lobe: in this procedure, the right hemi-liver of the recipient will be removed and the patient is supposed to be free of tumor at this point in time.
| 2270149 | ecrin-mdr-crc
Project description:The majority of transplanted organs are recovered from deceased donors after brain death (BD). BD has been hypothesized to compromise organ quality in part from the activation of systemic inflammation. The objective of this study was to characterize the immune response induced by BD in a well controlled non-human primate (NHP) model. Assessment of physiologic parameters (blood pressure, heart rate, urinary output, catecholamines, and cerebral angiograms) was used to confirm BD. After 6h of BD, we monitored changes in the peripheral blood by flow cytometry, liver gene expression by microarray and liver protein expression by Western blotting and immunohistochemistry (IHC). BD was indicated by a rapid increase in blood pressure followed by hemodynamic instability, hypotension, diabetes insipidus and the absence of cerebral blood flow and brain stem reflexes. Within the peripheral blood IL-6 levels and neutrophils increased and myeloid dendritic cells decreased in BD NHP when compared to living donor controls. Genes related to innate inflammatory response and apoptosis were significantly upregulated in BD NHP. BD livers showed increased expression of suppressor of cytokine signaling 3 (SOCS3) protein and the danger associated molecular pattern protein S100A9. Increased expression of intracellular cellular adhesion molecule 1 (ICAM-1) and major histocompatibility complex (MHC) II, neutrophil accumulation, and products of oxidative stress (carboxy methyl lysine (CML) and hydroxynonenal (HNE)) were detected by IHC in livers. Conclusion: These data indicate that BD leads to the rapid activation of an inflammatory response within the liver involving components of the innate immune response at the gene and protein levels. The activation of these inflammatory pathways may provide one explanation for the reduced post-transplant function of organs from brain dead donors. Microarray analysis was performed to compare gene expression patterns from livers recovered after 5 hours of brain death (n=5) and from "living donor" non-brain dead controls (n=5).
2012-06-27 | E-GEOD-22624 | biostudies-arrayexpress