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https://www.readbyqxmd.com/read/29053910/a-simplified-protocol-using-rituximab-and-immunoglobulin-for-abo-incompatible-low-titer-living-donor-liver-transplantation
#1
Seong Hoon Kim, Eung Chang Lee, Jae Ryong Shim, Sang Jae Park
BACKGROUND & AIMS: No consensus has been reached regarding optimal treatment strategies for ABO-incompatible (ABO-I) living donor liver transplantation (LDLT). We introduce a simplified protocol using rituximab and intravenous immunoglobulin (IVIG). METHODS: Data were analyzed on adult patients who underwent ABO-I LDLT of which protocol added rituximab (300 mg/m(2) ) before surgery and IVIG (0.8 g/kg) on postoperative days 1 and 4 to the conventional immunosuppressive regimen used in ABO-compatible (ABO-C) LDLT, without plasmapheresis, splenectomy, or graft local infusion...
October 20, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/29052290/pulmonary-langerhans-cell-histiocytosis-de-novo-after-lung-transplantation
#2
Javier Gómez-Román, María Teresa Zarrabeitia, Ana Santurtún, José Antonio Parra, Ainara Azueta Etxebarría, Jose M Cifrian, Javier Freire Salinas
A pulmonary Langerhans cell histiocytosis is presented in a 40 year-old woman two years after bilateral lung transplantation for emphysema without any signs of Langerhans cells proliferation in the explanted lungs. A microsatellite molecular analysis showed the proliferating cells were generated in a recipient cellular clone. The patient did not quit smoking after transplantation. No signs of disease were detected in the implanted lungs before surgery. Strict control of immunosupressive drug levels stabilized the disease...
October 20, 2017: Pathology International
https://www.readbyqxmd.com/read/29050459/third-party-regulatory-t-cells-prevent-murine-acute-graft-versus-host-disease
#3
Jung-Yeon Lim, Keon-Il Im, Yunejin Song, Nayoun Kim, Young-Sun Nam, Young-Woo Jeon, Seok-Goo Cho
Background/Aims: Adoptive therapy with regulatory T (Treg) cells to prevent graft-versus-host disease (GVHD) would benefit from a strategy to improve homing to the sites of inflammation following hematopoietic stem cell transplantation (HSCT). Although donor-derived Treg cells have mainly been used in these models, third-party-derived Treg cells are a promising alternative for cell-based immunotherapy, as they can be screened for pathogens and cell activity, and banked for GVHD prevention...
October 19, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/29047209/effects-of-cryopreservation-on-adipose-tissue-derived-microvascular-fragments
#4
Matthias W Laschke, Philipp Karschnia, Claudia Scheuer, Alexander Heß, Wolfgang Metzger, Michael D Menger
Adipose tissue-derived microvascular fragments (ad-MVF) are effective vascularization units for tissue engineering. They rapidly reassemble into new microvascular networks after seeding on scaffolds and subsequent in vivo implantation. Herein, we analyzed whether the vascularization capacity of ad-MVF is affected by cryopreservation. Ad-MVF were isolated from the epididymal fat pads of C57BL/6 mice and cryopreserved for 7 days to compare their morphology, viability, cellular composition and protein expression with freshly isolated control ad-MVF...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29047121/in-vivo-tracking-of-the-tropism-of-mesenchymal-stem-cells-to-malignant-gliomas-using-reporter-gene-based-mr-imaging
#5
Minghui Cao, Jiaji Mao, Xiaohui Duan, Liejing Lu, Fang Zhang, Bingling Lin, Meiwei Chen, Chushan Zheng, Xiang Zhang, Jun Shen
Mesenchymal stem cells (MSCs) have emerged as a promising cellular vehicle for gene therapy of malignant gliomas due to their property of tumor tropism. However, MSCs may show bidirectional and divergent effects on tumor growth. Therefore, a robust surveillance system with a capacity for noninvasive monitoring of the homing, distribution and fate of stem cells in vivo is highly desired for developing stem cell-based gene therapies for tumors. In this study, we used ferritin gene-based magnetic resonance imaging (MRI) to track the tumor tropism of MSCs in a rat orthotopic xenograft model of malignant glioma...
October 19, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29047088/lung-ischaemia-reperfusion-injury-the-role-of-reactive-oxygen-species
#6
Oleg Pak, Akylbek Sydykov, Djuro Kosanovic, Ralph T Schermuly, Alexander Dietrich, Katrin Schröder, Ralf P Brandes, Thomas Gudermann, Natascha Sommer, Norbert Weissmann
Lung ischaemia-reperfusion injury (LIRI) occurs in many lung diseases and during surgical procedures such as lung transplantation. The re-establishment of blood flow and oxygen delivery into the previously ischaemic lung exacerbates the ischaemic injury and leads to increased microvascular permeability and pulmonary vascular resistance as well as to vigorous activation of the immune response. These events initiate the irreversible damage of the lung with subsequent oedema formation that can result in systemic hypoxaemia and multi-organ failure...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29046484/t-cells-expressing-chimeric-antigen-receptor-promote-immune-tolerance
#7
Antonio Pierini, Bettina P Iliopoulou, Heshan Peiris, Magdiel Pérez-Cruz, Jeanette Baker, Katie Hsu, Xueying Gu, Ping-Ping Zheng, Tom Erkers, Sai-Wen Tang, William Strober, Maite Alvarez, Aaron Ring, Andrea Velardi, Robert S Negrin, Seung K Kim, Everett H Meyer
Cellular therapies based on permanent genetic modification of conventional T cells have emerged as a promising strategy for cancer. However, it remains unknown if modification of T cell subsets, such as Tregs, could be useful in other settings, such as allograft transplantation. Here, we use a modular system based on a chimeric antigen receptor (CAR) that binds covalently modified mAbs to control Treg activation in vivo. Transient expression of this mAb-directed CAR (mAbCAR) in Tregs permitted Treg targeting to specific tissue sites and mitigated allograft responses, such as graft-versus-host disease...
October 19, 2017: JCI Insight
https://www.readbyqxmd.com/read/29042548/human-mesenchymal-stromal-cells-transplanted-into-mice-stimulate-renal-tubular-cells-and-enhance-mitochondrial-function
#8
Luca Perico, Marina Morigi, Cinzia Rota, Matteo Breno, Caterina Mele, Marina Noris, Martino Introna, Chiara Capelli, Lorena Longaretti, Daniela Rottoli, Sara Conti, Daniela Corna, Giuseppe Remuzzi, Ariela Benigni
Mesenchymal stromal cells (MSCs) are renoprotective and drive regeneration following injury, although cellular targets of such an effect are still ill-defined. Here, we show that human umbilical cord (UC)-MSCs transplanted into mice stimulate tubular cells to regain mitochondrial mass and function, associated with enhanced microtubule-rich projections that appear to mediate mitochondrial trafficking to create a reparative dialogue among adjacent tubular cells. Treatment with UC-MSCs in mice with cisplatin-induced acute kidney injury (AKI) regulates mitochondrial biogenesis in proximal tubuli by enhancing PGC1α expression, NAD(+) biosynthesis and Sirtuin 3 (SIRT3) activity, thus fostering antioxidant defenses and ATP production...
October 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29039058/recurrent-and-de-novo-glomerulonephritis-following-renal-transplantation-higher-rates-of-rejection-and-lower-graft-survival
#9
Safak Mirioglu, Yasar Caliskan, Yagmur Goksoy, Sibel Gulcicek, Yasemin Ozluk, Irem Sarihan, Nurhan Seyahi, Isin Kilicaslan, Aydin Turkmen, Mehmet Sukru Sever
PURPOSE: In this retrospective study with case-control design, we aimed to determine the clinical and pathological characteristics of post-transplant glomerulonephritis (GN), and their effects on transplant recipients. METHODS: One hundred and twenty renal transplant recipients with biopsy-proven recurrent or de novo primary GN were compared with two matched control groups including 120 transplant recipients with nonrecurrent primary GN (nonrecurrent GN group) and 120 transplant recipients with non-GN etiology (non-GN group)...
October 16, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29036025/the-fate-of-the-adipose-derived-stromal-cells-during-angiogenesis-and-adipogenesis-after-cell-assisted-lipotransfer
#10
Ki Yong Hong, Sangjun Yim, Hyun Jung Kim, Ung Sik Jin, SooA Lim, SuRak Eo, Hak Chang, Kyung Won Minn
BACKGROUND: Cell-assisted lipotransfer (CAL) is a process in which fat grafting is supplemented with autologous adipose-derived stromal cells (ASCs). Since the efficacy of the technique was demonstrated, studies have focused on the mechanism by which CAL enhances the rate of graft survival. However, the microenvironmental changes in donor and recipient tissue associated with CAL remain unclear. METHODS: We introduced an animal model of CAL using two different transgenic reporter mice...
October 12, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29033080/reconstitution-of-th17-tc17-and-treg-cells-after-paediatric-haematopoietic-stem-cell-transplantation-impact-of-interleukin-7
#11
Katrine Kielsen, Lars P Ryder, David Lennox-Hvenekilde, Monika Gad, Claus H Nielsen, Carsten Heilmann, Marianne Ifversen, Anders Elm Pedersen, Klaus Müller
Successful reconstitution of T lymphocytes after allogeneic haematopoietic stem cell transplantation (HSCT) is needed to establish the graft-versus-leukaemia effect and an effective anti-microbial defense, but the ratio between functionally different T-cell subsets needs to be balanced to avoid graft-versus-host disease (GVHD). IL-7 is essential for T-cell generation in the thymus and peripheral T-cell homeostasis. High IL-7 levels have been associated with impaired T-cell reconstitution, increased risk of acute GVHD and treatment-related mortality, but the underlying cellular mechanisms behind these associations have not been investigated previously...
October 9, 2017: Immunobiology
https://www.readbyqxmd.com/read/29030994/transplant-tourism-following-the-declaration-of-istanbul-poor-outcomes-and-nephrologist-dilemma
#12
Meteb M AlBugami, Fahad E AlOtaibe, Abdulnaser M AlAbadi, Khaled Hamawi, Khalid Bel'eed-Akkari
BACKGROUND: Transplant tourism (TT) violates many international laws and documents. Despite all efforts, TT seems to be increasing. The aim of this study is to review outcomes of recipients of commercially transplanted kidneys since the Declaration of Istanbul. METHODS: All recipients of kidney transplantation done abroad and then returned to our center, from September 2008 to December 2015, were included (tourists). Demographics and outcomes were collected from patients' charts...
October 14, 2017: Nephrology
https://www.readbyqxmd.com/read/29030720/molecular-diagnostic-testing-in-cardiac-transplantation
#13
REVIEW
Kiran Khush, Shirin Zarafshar
PURPOSE OF REVIEW: Acute rejection is one of the most feared complications of cardiac transplantation. Developing non-invasive methods for detection and surveillance of acute rejection have long been a goal for post-transplant care. RECENT FINDINGS: Here, we will review molecular diagnostic tests that are currently in use or under development to diagnose acute cellular rejection after cardiac transplantation. Gene expression, microRNA, molecular microscope, and cell-free DNA assays offer non-invasive alternatives to the endomyocardial biopsy for acute rejection surveillance...
October 13, 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/29029297/cytomegalovirus-specific-t-cell-transfer-for-refractory-cytomegalovirus-infection-after-haploidentical-stem-cell-transplantation-the-quantitative-and-qualitative-immune-recovery-for-cytomegalovirus
#14
Xu-Ying Pei, Xiang-Yu Zhao, Ying-Jun Chang, Jing Liu, Lan-Ping Xu, Yu Wang, Xiao-Hui Zhang, Wei Han, Yu-Hong Chen, Xiao-Jun Huang
Background: The efficiency and mechanisms of adoptive transfer of cytomegalovirus (CMV)specific T cells for refractory CMV infection after haploidentical stem cell transplantation (haplo-SCT) remain largely unknown. Methods: Thirty-two patients with refractory CMV infection who accepted treatment with adoptive CMV-specific T-cell infusion following haplo-SCT were prospectively enrolled. Another 32 patients with nonrefractory CMV infection after haplo-SCT were selected as control subjects...
September 23, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29026463/t-cell-allorecognition-of-donor-glutathione-s-transferase-t1-in-plasma-cell-rich-rejection
#15
María José Martínez-Bravo, Berta Sánchez, José Manuel Sousa, María José Acevedo, Miguel Angel Gómez-Bravo, Antonio Núñez-Roldán, Isabel Aguilera
AIM: To investigate the role of glutathione S-transferase T1 donor-specific T lymphocytes in plasma cell-rich rejection of liver allografts. METHODS: The study group included 22 liver transplant patients. Among them, 18 patients were mismatched for the glutathione S-transferase T1 (GSTT1) alleles (don+/rec-), and 4 were matched (don+/rec+). Seven of the mismatched patients produced anti-GSTT1 antibodies and developed plasma cell-rich rejection (former de novo immune hepatitis)...
September 28, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/29026445/viral-communities-of-the-human-gut-metagenomic-analysis-of-composition-and-dynamics
#16
REVIEW
Varun Aggarwala, Guanxiang Liang, Frederic D Bushman
BACKGROUND: The numerically most abundant biological entities on Earth are viruses. Vast populations prey on the cellular microbiota in all habitats, including the human gut. MAIN BODY: Here we review approaches for studying the human virome, and some recent results on movement of viral sequences between bacterial cells and eukaryotic hosts. We first overview biochemical and bioinformatic methods, emphasizing that specific choices in the methods used can have strong effects on the results obtained...
2017: Mobile DNA
https://www.readbyqxmd.com/read/29023354/effects-of-hypercapnia-on-acute-cellular-rejection-after-lung-transplantation-in-rats
#17
Jing Tan, Yanhong Liu, Tao Jiang, Ling Wang, Can Zhao, Dongfang Shen, Xiaoguang Cui
BACKGROUND: Hypercapnia alleviates pulmonary ischemia-reperfusion injury, regulates T lymphocytes, and inhibits immune reaction. This study aimed to evaluate the effect of hypercapnia on acute cellular rejection in a rat lung transplantation model. METHODS: Recipient rats in sham-operated (Wistar), isograft (Wistar to Wistar), and allograft (Sprague-Dawley to Wistar) groups were ventilated with 50% oxygen, whereas rats in the hypercapnia (Sprague-Dawley to Wistar) group were administered 50% oxygen and 8% carbon dioxide for 90 min during reperfusion (n = 8)...
October 12, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29021411/biomaterials-for-corneal-bioengineering
#18
Zhi Chen, Jingjing You, Xiao Liu, Simon Cooper, Christopher Hodge, Gerard Sutton, Jeremy Micah Crook, Gordon G Wallace
Corneal transplantation is an important surgical treatment for many common corneal diseases. However, a worldwide shortage of tissue from suitable corneal donors has meant that many people are not able to receive sight-restoring operations. In addition, rejection is a major cause of corneal transplant failure. Bioengineering corneal tissue has recently gained widespread attention. In order to facilitate corneal regeneration, a range of materials is currently being investigated. The ideal substrate requires sufficient tectonic durability, biocompatibility with cultured cellular elements, transparency, and perhaps biodegradability and clinical-compliance...
October 12, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/29018080/chd7-deficiency-delays-leukemogenesis-in-mice-induced-by-cbfb-myh11
#19
Tao Zhen, Erika Kwon, Ling Zhao, Jingmei Hsu, R Katherine Hyde, Ying Lu, Lemlem Alemu, Nancy A Speck, P Paul Liu
Inversion of chromosome 16 is a consistent finding in patients with acute myeloid leukemia subtype M4 with eosinophilia (AML M4Eo), which generates a CBFB-MYH11 fusion gene. Previous studies showed that the interaction between CBFβ-SMMHC (encoded by CBFB-MYH11) and RUNX1 plays a critical role in the pathogenesis of this leukemia. Recently, it was shown that chromodomain-helicase-DNA binding protein 7 (CHD7) interacts with RUNX1 and suppresses RUNX1-induced expansion of hematopoietic stem and progenitor cells...
October 10, 2017: Blood
https://www.readbyqxmd.com/read/28990220/low-dose-basiliximab-induction-therapy-in-heart-transplantation
#20
Veraprapas Kittipibul, Pakpoom Tantrachoti, Pat Ongcharit, Aekarach Ariyachaipanich, Sarawut Siwamogsatham, Supaporn Sritangsirikul, Kanokwan Thammanatsakul, Sarinya Puwanant
We prospectively studied efficacy and safety outcomes of two 10-mg doses of intravenous basiliximab on day 0 and day 4 for induction therapy in 17 consecutive de novo heart transplant recipients. By the 2-week assessment post-transplant, there were no deaths, graft failures, or acute cellular rejections (ACRs) ISHLT grade ≥ 2R. By the 1-year assessment post-transplant, there were 1 (6%) infectious death, no graft failure, 2 (12%) grade 2R ACRs, 6 (35%) asymptomatic CMV infections, and 4 (25%) treated infections...
October 9, 2017: Clinical Transplantation
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