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liver transplantation immunology

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https://www.readbyqxmd.com/read/29782877/analysis-of-spontaneous-resolution-of-cytomegalovirus-replication-after-transplantation-in-cmv-seropositive-patients-with-pretransplant-cd8-ifng-response
#1
Aurora Páez-Vega, Antonio Poyato, Alberto Rodriguez-Benot, Lluis Guirado, Jesús Fortún, Oscar Len, Edson Abdala, María C Fariñas, Elisa Cordero, Carmen de Gracia, Domingo Hernández, Rafael González, Julián Torre-Cisneros, Sara Cantisán
This prospective study evaluates whether CMV-seropositive (R+) transplant patients with pretransplant CD8+IFNG+ T-cell response to cytomegalovirus (CMV) (CD8+IFNG+ response) can spontaneously clear the CMV viral load without requiring treatment. A total of 104 transplant patients (kidney/liver) with pretransplant CD8+IFNG+ response were evaluable. This response was determined using QuantiFERON-CMV assay. The incidence of CMV replication and disease was 45.2% (47/104) and 6.7% (7/104), respectively. Of the total patients, 77...
May 18, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29782661/comparable-outcomes-in-intestinal-retransplantation-single-center-cohort-study
#2
Burcin Ekser, Chandrashekhar A Kubal, Jonathan A Fridell, Richard S Mangus
BACKGROUND: Graft loss in intestinal transplantation (ITx) is close to 25% in the first year and 50% at 5-year post-transplantation. Although technically and immunologically challenging, intestinal retransplantation is now the 4th most common indication for ITx. METHODS: The aim of this study is to review and compare the outcomes of intestinal retransplantation with primary ITx, which included isolated ITx, modified multivisceral transplantation (mMVTx), and full MVTx, between 2003-2014 at Indiana University...
May 21, 2018: Clinical Transplantation
https://www.readbyqxmd.com/read/29750876/evaluation-of-molecular-changes-of-distal-organs-after-small-bowel-transplantation-experimental-study
#3
P Urban, M Rabajdová, Š Feterik, G Bódy, T Granda, M Mareková, J Veselá
The ischemia and reperfusion of a jejunal graft during transplantation triggers the stress of endoplasmic reticulum; thus inducing the synthesis of pro-inflammatory cytokines. Spreading of these signals stimulate immunological reactions in distal tissues i.e. lung, liver and spleen. The aim of this study was to detect the molecular changes in liver and spleen induced by transplanted jejunal graft with one or six hours of reperfusion (group Tx1 and Tx6). Analysis of gene expression changes of inflammatory mediators (TNFalpha, IL-10) and specific chaperones (Gadd153, Grp78) derived from endoplasmic reticulum (ER) was done and compared to control group...
May 10, 2018: Physiological Research
https://www.readbyqxmd.com/read/29749672/transgenic-mice-that-accept-luciferase-or-gfp-expressing-syngeneic-tumor-cells-at-high-efficiencies
#4
Naoki Aoyama, Hiroyuki Miyoshi, Hitoshi Miyachi, Masahiro Sonoshita, Masaru Okabe, Makoto Mark Taketo
Jellyfish green fluorescent protein (GFP) and firefly luciferase can serve as versatile tracking markers for identification and quantification of transplanted cancer cells in vivo. However, immune reactions against these markers can hamper the formation of syngraft tumors and metastasis that follows. Here, we report two transgenic (Tg) mouse lines that express nonfunctional mutant marker proteins, namely modified firefly luciferase (Luc2) or enhanced GFP (EGFP). These mice, named as Tg-mLuc2 and Tg-mEGFP, turned out to be immunologically tolerant to the respective tracking markers and thus efficiently accepted syngeneic cancer cells expressing the active forms of the markers...
May 11, 2018: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/29735030/living-donor-intestinal-transplantation
#5
REVIEW
Ivo G Tzvetanov, Kiara A Tulla, Giuseppe D'Amico, Enrico Benedetti
Living donor intestinal transplantation (LDIT) has been improved leading to results comparable to those obtained with deceased donors. LDIT should be limited to specific indications and patient selection. The best indication is combined living donor intestinal/liver transplantation in pediatric recipients with intestinal and hepatic failure; the virtual elimination of waiting time may avoid the high mortality experienced by candidates on the deceased waiting list. Potentially, LDIT could be used in highly sensitized recipients to allow the application of de-sensitization protocols...
June 2018: Gastroenterology Clinics of North America
https://www.readbyqxmd.com/read/29735024/immunologic-monitoring-to-personalize-immunosuppression-after-liver-transplant
#6
REVIEW
Andrew Zhu, Alexandra Leto, Abraham Shaked, Brendan Keating
Although immunosuppressive drugs have enhanced patient outcomes in transplantation, the liver transplant community has made significant research efforts into the discovery of more accurate and precise methods of posttransplant monitoring and diagnosing. Current research in biomarkers reveals many promising approaches.
June 2018: Gastroenterology Clinics of North America
https://www.readbyqxmd.com/read/29732615/update-on-cellular-encapsulation
#7
REVIEW
Kate E Smith, Robert C Johnson, Klearchos K Papas
There is currently a significant disparity between the number of patients who need lifesaving transplants and the number of donated human organs. Xenotransplantation is a way to address this disparity and attempts to enable the use of xenogeneic tissues have persisted for centuries. While immunologic incompatibilities have presented a persistent impediment to their use, encapsulation may represent a way forward for the use of cell-based xenogeneic therapeutics without the need for immunosuppression. In conjunction with modern innovations such as the use of bioprinting, incorporation of immune modulating molecules into capsule membranes, and genetic engineering, the application of xenogeneic cells to treat disorders ranging from pain to liver failure is becoming increasingly realistic...
May 6, 2018: Xenotransplantation
https://www.readbyqxmd.com/read/29732274/clinical-hepatocyte-transplantation-what-is-next
#8
James E Squires, Kyle A Soltys, Patrick McKiernan, Robert H Squires, Stephen C Strom, Ira J Fox, Alejandro Soto-Gutierrez
Purpose of review: Significant recent scientific developments have occurred in the field of liver repopulation and regeneration. While techniques to facilitate liver repopulation with donor hepatocytes and different cell sources have been studied extensively in the laboratory, in recent years clinical hepatocyte transplantation (HT) and liver repopulation trials have demonstrated new disease indications and also immunological challenges that will require the incorporation of a fresh look and new experimental approaches...
December 2017: Current Transplantation Reports
https://www.readbyqxmd.com/read/29605022/posttransplant-complications-in-adult-recipients-of-intestine-grafts-without-bowel-decontamination
#9
Jared W Clouse, Chandrashekhar A Kubal, Jonathan A Fridell, Richard S Mangus
BACKGROUND: Selective digestive decontamination is commonly used to decrease lumenal bacterial flora. Preoperative bowel decontamination may be associated with a lower wound infection rate but has not been shown to decrease risk of intra-abdominal abscess or lower leak rate for enteric anastomoses. Alternatively, the decontamination disrupts the normal flora of the gastrointestinal tract and may affect normal physiology, including immunologic function. This study reports complication rates of an intestine transplant program that has never used bowel decontamination...
May 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29596181/chapter-6-0-history-of-paediatric-hepatology-in-espghan
#10
Martin Burdelski
Hepatology played an important role in ESPGAN from the beginning. In 1989, the Hepatology Committee was started. In the early 1990s H for hepatology was included in ESPGHAN. Hepatology Summer schools were held from 1995 and later monothematic conferences met the needs of many young ESPGHAN members. The role of ESPGHAN members in the progress of diagnostic and therapeutic measures in hepatitis B and C will be elucidated (Chapter 6.1) as well as the role of other ESPGHAN members in the understanding of immunological hepatic disorders of childhood (Chapter 6...
April 2018: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29545802/potential-beneficial-effects-of-cytomegalovirus-infection-after-transplantation
#11
REVIEW
Nicolle H R Litjens, Lotte van der Wagen, Jurgen Kuball, Jaap Kwekkeboom
Cytomegalovirus (CMV) infection can cause significant complications after transplantation, but recent emerging data suggest that CMV may paradoxically also exert beneficial effects in two specific allogeneic transplant settings. These potential benefits have been underappreciated and are therefore highlighted in this review. First, after allogeneic hematopoietic stem cell transplantation (HSCT) for acute myeloid leukemia (AML) using T-cell and natural killer (NK) cell-replete grafts, CMV reactivation is associated with protection from leukemic relapse...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29545795/serial-monitoring-of-immune-markers-being-represented-regulatory-t-cell-t-helper-17-cell-ratio-indicating-tolerance-for-tapering-immunosuppression-after-liver-transplantation
#12
JooYeon Jhun, Seung Hoon Lee, Soon Kyu Lee, Hee Yeon Kim, Eun Sun Jung, Dong Goo Kim, JeongWon Choi, Si Hyun Bae, Seung Kew Yoon, Byung Ha Chung, Chul Woo Yang, Mi-La Cho, Jong Young Choi
Recipients of liver transplantation (LT) require long-term immunosuppressive drug treatment, but lifelong immunosuppressive treatment has severe side effects. It is known that some LT recipients develop immune tolerance, and although the development of such operational tolerance should allow a decrease in the burden of immunosuppressive drug treatment, the factors that indicate operational tolerance are not clear. This study aimed to monitor immunological markers over time in LT recipients to identify those markers indicating the development of operational tolerance...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29545512/immunological-status-of-children-born-to-female-liver-recipients
#13
Agnieszka Drozdowska-Szymczak, Bronisława Pietrzak, Natalia Czaplińska, Joanna Schreiber-Zamora, Zoulikha Jabiry-Zieniewicz, Mirosław Wielgoś, Bożena Kociszewska-Najman
BACKGROUND Immunosuppressive treatment in pregnant organ recipients can affect functions of the fetal and newborn immune system. The aim of this study was to evaluate the effect of this treatment on selected parameters of the immune system of children born to mothers after liver transplantation. MATERIAL AND METHODS The study included 52 children born to liver recipients and 52 children in the control group. The study was conducted in the 1st Department of Obstetrics and Gynecology, Medical University of Warsaw...
March 16, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/29528732/current-and-future-perspectives-in-autoimmune-hepatitis
#14
Eleni Theocharidou, Michael A Heneghan
Autoimmune hepatitis occurs in genetically susceptible individuals as a result of loss of immunological tolerance to hepatic autoantigens that can be precipitated by environmental triggers. The clinical manifestation is usually insidious but can be also acute with liver failure. The diagnosis is made on the basis of antibody positivity, elevated immunoglobulin G levels and interface hepatitis on liver histology. Induction of remission is achieved with high-dose steroids in the majority of cases, and maintenance of remission with azathioprine...
March 2, 2018: British Journal of Hospital Medicine
https://www.readbyqxmd.com/read/29528012/morphologic-and-immunologic-characteristics-of-hepatocellular-carcinoma-for-prognosis-of-surgical-intervention
#15
Gulziya Ismailova, Eugene Yenin, Shokan Kaniev, Dinara Bayguisova, Talgat Tajibaev
OBJECTIVES: Hepatocellular carcinoma is the predominant malignancy in patients with cirrhosis and chronic liver disease. Our aim was to assess the morphologic, radiologic, and immunologic charac teristics of hepatocellular carcinoma and liver cirrhosis concerning surgical treatment tactics. MATERIALS AND METHODS: We performed a cross-sectional analysis of a prospective study performed at the JSC National Scientific Center of Surgery (named after A. Syzganov). The study included 58 patients: 31 with hepatocellular carcinoma (53...
March 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29511625/a-standardized-fold-change-method-for-microarray-differential-expression-analysis-used-to-reveal-genes-involved-in-acute-rejection-in-murine-allograft-models
#16
Weichen Zhou, Yi Wang, Masayuki Fujino, Leming Shi, Li Jin, Xiao-Kang Li, Jiucun Wang
Murine transplantation models are used extensively to research immunological rejection and tolerance. Here we studied both murine heart and liver allograft models using microarray technology. We had difficulty in identifying genes related to acute rejections expressed in both heart and liver transplantation models using two standard methodologies: Student's t test and linear models for microarray data (Limma). Here we describe a new method, standardized fold change (SFC), for differential analysis of microarray data...
March 2018: FEBS Open Bio
https://www.readbyqxmd.com/read/29507859/-in-vitro-intracellular-ifn%C3%AE-il-17-and-il-10-producing-t-cells-correlates-with-the-occurrence-of-post-transplant-opportunistic-infection-in-liver-and-kidney-recipients
#17
Francisco Boix, Santiago Llorente, Jorge Eguía, Gema Gonzalez-Martinez, Rafael Alfaro, Jose A Galián, Jose A Campillo, María Rosa Moya-Quiles, Alfredo Minguela, Jose A Pons, Manuel Muro
AIM: To validate intracellular cytokine production functional assay as means of cell-mediated immunity monitoring of post-transplant patients with opportunistic infection (OI). METHODS: Intracellular cytokine-producing CD4+ and CD8+ T-cell monitoring was carried out in 30 liver transplant (LTr) and 31 kidney transplant (KTr) recipients from 2010 to 2012. Patients were assessed in our Department of Immunology at the Clinical University 'Hospital Virgen de la Arrixaca-IMIB' in Murcia, Spain for one year following transplantation...
February 24, 2018: World Journal of Transplantation
https://www.readbyqxmd.com/read/29489751/recognition-of-dhn-melanin-by-a-c-type-lectin-receptor-is-required-for-immunity-to-aspergillus
#18
Mark H T Stappers, Alexandra E Clark, Vishukumar Aimanianda, Stefan Bidula, Delyth M Reid, Patawee Asamaphan, Sarah E Hardison, Ivy M Dambuza, Isabel Valsecchi, Bernhard Kerscher, Anthony Plato, Carol A Wallace, Raif Yuecel, Betty Hebecker, Maria da Glória Teixeira Sousa, Cristina Cunha, Yan Liu, Ten Feizi, Axel A Brakhage, Kyung J Kwon-Chung, Neil A R Gow, Matteo Zanda, Monica Piras, Chiara Zanato, Martin Jaeger, Mihai G Netea, Frank L van de Veerdonk, João F Lacerda, António Campos, Agostinho Carvalho, Janet A Willment, Jean-Paul Latgé, Gordon D Brown
Resistance to infection is critically dependent on the ability of pattern recognition receptors to recognize microbial invasion and induce protective immune responses. One such family of receptors are the C-type lectins, which are central to antifungal immunity. These receptors activate key effector mechanisms upon recognition of conserved fungal cell-wall carbohydrates. However, several other immunologically active fungal ligands have been described; these include melanin, for which the mechanism of recognition is hitherto undefined...
March 15, 2018: Nature
https://www.readbyqxmd.com/read/29479440/liver-inclusive-intestinal-transplantation-results-in-decreased-alloimmune-mediated-rejection-but-increased-infection
#19
Guosheng Wu, Ruy J Cruz
Background and aims: A co-transplanted liver allograft has been thought to protect other organs from rejection-mediated injury; however, detailed analyses of co-transplanted liver on intestinal allograft outcomes have not been conducted to date. The aim of the study was to compare immune-mediated injury, causes of graft failure and clinical outcomes between recipients who underwent either a liver-inclusive intestinal transplant (LITx) or liver-exclusive intestinal transplant (LETx). Methods: Between May 2000 and May 2010, 212 adult patients undergoing LITx ( n  =76) and LETx ( n  =136) were included...
February 2018: Gastroenterology Report
https://www.readbyqxmd.com/read/29477639/critical-challenges-and-emerging-opportunities-in-hepatitis-c-virus-research-in-an-era-of-potent-antiviral-therapy-considerations-for-scientists-and-funding-agencies
#20
REVIEW
Ralf Bartenschlager, Thomas F Baumert, Jens Bukh, Michael Houghton, Stanley M Lemon, Brett D Lindenbach, Volker Lohmann, Darius Moradpour, Thomas Pietschmann, Charles M Rice, Robert Thimme, Takaji Wakita
The development and clinical implementation of direct-acting antivirals (DAAs) has revolutionized the treatment of chronic hepatitis C. Infection with any hepatitis C virus (HCV) genotype can now be eliminated in more than 95% of patients with short courses of all-oral, well-tolerated drugs, even in those with advanced liver disease and liver transplant recipients. DAAs have proven so successful that some now consider HCV amenable to eradication, and continued research on the virus of little remaining medical relevance...
March 15, 2018: Virus Research
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