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Renal immunology

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https://www.readbyqxmd.com/read/28319051/tissue-specific-exosome-biomarkers-for-noninvasively-monitoring-immunologic-rejection-of-transplanted-tissue
#1
Prashanth Vallabhajosyula, Laxminarayana Korutla, Andreas Habertheuer, Ming Yu, Susan Rostami, Chao-Xing Yuan, Sanjana Reddy, Chengyang Liu, Varun Korutla, Brigitte Koeberlein, Jennifer Trofe-Clark, Michael R Rickels, Ali Naji
In transplantation, there is a critical need for noninvasive biomarker platforms for monitoring immunologic rejection. We hypothesized that transplanted tissues release donor-specific exosomes into recipient circulation and that the quantitation and profiling of donor intra-exosomal cargoes may constitute a biomarker platform for monitoring rejection. Here, we have tested this hypothesis in a human-into-mouse xenogeneic islet transplant model and validated the concept in clinical settings of islet and renal transplantation...
March 20, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28303661/immunological-and-physiological-observations-in-baboons-with-life-supporting-genetically-engineered-pig-kidney-grafts
#2
Hayato Iwase, Hidetaka Hara, Mohamed Ezzelarab, Tao Li, Zhongqiang Zhang, Bingsi Gao, Hong Liu, Cassandra Long, Yi Wang, Amy Cassano, Edwin Klein, Carol Phelps, David Ayares, Abhinav Humar, Martin Wijkstrom, David K C Cooper
BACKGROUND: Genetically engineered pigs could provide a source of kidneys for clinical transplantation. The two longest kidney graft survivals reported to date have been 136 and 310 days, but graft survival >30 days has been unusual until recently. METHODS: Donor pigs (n=4) were on an α1,3-galactosyltransferase gene-knockout (GTKO)/human complement regulatory protein (CD46) background (GTKO/CD46). In addition, the pigs were transgenic for at least one human coagulation regulatory protein...
March 17, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28299466/development-of-oral-cancer-vaccine-using-recombinant-bifidobacterium-displaying-wilms-tumor-1-protein
#3
Koichi Kitagawa, Tsugumi Oda, Hiroki Saito, Ayame Araki, Reina Gonoi, Katsumi Shigemura, Yoshiko Hashii, Takane Katayama, Masato Fujisawa, Toshiro Shirakawa
Several types of vaccine-delivering tumor-associated antigens (TAAs) have been developed in basic and clinical research. Wilms' tumor 1 (WT1), identified as a gene responsible for pediatric renal neoplasm, is one of the most promising TAA for cancer immunotherapy. Peptide and dendritic cell-based WT1 cancer vaccines showed some therapeutic efficacy in clinical and pre-clinical studies but as yet no oral WT1 vaccine can be administrated in a simple and easy way. In the present study, we constructed a novel oral cancer vaccine using a recombinant Bifidobacterium longum displaying WT1 protein...
March 15, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28296035/sepsis-after-renal-transplantation-clinical-immunological-and-microbiological-risk-factors
#4
Thomas Schachtner, Maik Stein, Petra Reinke
BACKGROUND: As immunosuppressive therapy and allograft survival have improved, the increased incidence of sepsis has become a major hurdle of disease-free survival after renal transplantation. METHODS: We identified 112 of 957 kidney transplant recipients (KTRs) with sepsis. 31 KTRs developed severe sepsis or septic shock, and 30 KTRs died from sepsis. KTRs without sepsis were used for comparison. CMV-specific and alloreactive T-cells were measured using an interferon-γ Elispot-assay...
March 11, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28291241/efficacy-and-safety-of-direct-acting-antivirals-for-the-treatment-of-mixed-cryoglobulinemia
#5
Joel S Emery, Magdalena Kuczynski, Danie La, Saeed Almarzooqi, Matthew Kowgier, Hemant Shah, David Wong, Harry L A Janssen, Jordan J Feld
OBJECTIVES: Mixed cryoglobulinemia is strongly associated with hepatitis C virus (HCV) infection and ranges from being asymptomatic to causing life-threatening vasculitis. In those with symptoms, treatment with pegylated interferon (pegIFN) and ribavirin (RBV) reduces mortality. However, few data are available on the safety and efficacy of antiviral therapy with direct acting antivirals (DAAs) in the treatment of HCV-related cryoglobulinemia. METHODS: Patients treated for HCV-related cryoglobulinemia with DAA±pegIFN were retrospectively evaluated at a tertiary care center...
March 14, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28289089/molecular-pathways-oncologic-pathways-and-their-role-in-t-cell-exclusion-and-immune-evasion-a-new-role-for-the-axl-receptor-tyrosine-kinase
#6
Todd A Aguilera, Amato J Giaccia
With the clinical impact of CTLA-4 and PD-1/PD-L1 immune checkpoint therapies, widespread interest in cancer immunotherapy has been ignited. However, the rate and extent of clinical responses to approved therapies are limited and often non-existent in many solid tumors. This is partially because immune checkpoint therapies are most effective against T-cell inflamed tumors, and non-T-cell inflamed or T-cell excluded tumors remain a significant barrier. New strategies are needed to overcome immune resistance mechanisms that arise during tumor development which result in T-cell exclusion...
March 13, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28276430/beta-trace-protein-as-a-new-non-invasive-immunological-marker-for-quinolinic-acid-induced-impaired-blood-brain-barrier-integrity
#7
Andreas Baranyi, Omid Amouzadeh-Ghadikolai, Dirk von Lewinski, Robert J Breitenecker, Tatjana Stojakovic, Winfried März, Christoph Robier, Hans-Bernd Rothenhäusler, Harald Mangge, Andreas Meinitzer
Quinolinic acid, a macrophage/microglia-derived excitotoxin fulfills a plethora of functions such as neurotoxin, gliotoxin, and proinflammatory mediator, and it alters the integrity and cohesion of the blood-brain barrier in several pathophysiological states. Beta-trace protein (BTP), a monomeric glycoprotein, is known to indicate cerebrospinal fluid leakage. Thus, the prior aim of this study was to investigate whether BTP might non-invasively indicate quinolinic acid-induced impaired blood-brain barrier integrity...
March 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28260449/living-kidney-donor-cancellation-at-king-hussein-medical-center
#8
Katibh Al-Rabadi, Reham Issa Almardini, Mysoon Hajeer, Mahmood Hendawi, Aiham Hadad
OBJECTIVES: Living-related kidney donation is the main source of renal grafts in Jordan, since kidneys from deceased donors are scarce. Although the Jordanian community accepts the idea of kidney donation to family members, not all potential donors manage to complete the required psychologic and medical evaluations. We review the causes of kidney-donation cancellation and suggest options to increase the number of available organs. MATERIALS AND METHODS: We performed a retrospective chart review of all potential living-related kidney donors at King Hussein Medical Center between January 2008 and June 2016...
February 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28260427/annual-data-for-kidney-transplant-services-in-kuwait-2015
#9
Yahya M Makkeyah, Turki Al-Otaibi, Narayanan Nampoory, Prasad Nair, Mostafa Al-Mousawi, Mahmoud Samhan, Alaa Gawish, Tarek Said, Medhat A Halim, Osama Gheith
OBJECTIVES: Renal transplant services have been provided by the Hamed Al-Essa Organ Transplant Center in Ibn Sina Hospital since 1979 for Kuwaitis and non-Kuwaiti citizens residing in Kuwait. We aimed to monitor the activity and outcome of annual renal transplants in 2015. MATERIALS AND METHODS: Data on transplant patients were collected from hospital records from January 1, 2015, through December 31, 2015, at Ibn Sina Hospital. RESULTS: Eighty-one patients underwent a renal transplant in Kuwait in 2015; 46 patients (56...
February 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28260100/expression-profile-of-baff-in-peripheral-blood-from-patients-of-iga-nephropathy-correlation-with-clinical-features-and-streptococcus%C3%A2-pyogenes-infection
#10
Nuoyan Zheng, Jinjin Fan, Bing Wang, Dongxian Wang, Pinning Feng, Qiongqiong Yang, Xueqing Yu
B cells are critically important for the pathogenesis of IgA nephropathy (IgAN). The present study aimed to investigate the abundance of B cell activating factor (BAFF), which belongs to the tumor necrosis factor superfamily, in the peripheral blood of patients with IgAN. The different forms of BAFF in peripheral blood and its association with clinical features and immunological factors were analyzed. mRNA levels of BAFF and other associated genes in the peripheral blood mononuclear cells (PBMCs) of patients with IgAN and controls were analyzed by quantitative polymerase chain reaction...
February 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28255384/the-cellular-and-humoral-immunity-assay-in-patients-with-complicated-urolithiasis
#11
E Ceban, P Banov, A Galescu, D Tanase
Especially complicated, renal lithiasis contributes to the general inflammatory syndrome development that interferes with nonspecific, humoral and cellular immune system. The surgical treatment of nephrolithiasis is closely related to drug therapy of urinary infection, one of the reasons being the reduction of the immune status. The work is performed by evaluating the immunological status preoperatively in 58 patients with complicated lithiasis. The analysis of the status in these patients demonstrated that complicated urolithiasis results in significant changes in the immune system, these changes being expressed at the cellular and humoral level of immunity...
January 2017: Journal of Medicine and Life
https://www.readbyqxmd.com/read/28245084/donor-specificity-but-not-broadness-of-sensitization-is-associated-with-antibody-mediated-rejection-and-graft-loss-in-renal-allograft-recipients
#12
Caroline Wehmeier, Gideon Hönger, Hasret Cun, Patrizia Amico, Patricia Hirt-Minkowski, Argyrios Georgalis, Helmut Hopfer, Michael Dickenmann, Jürg Steiger, Stefan Schaub
Panel-reactive antibodies are widely regarded as an important immunological risk factor for rejection and graft loss. The broadness of sensitization against HLA is most appropriately measured by the 'calculated population-reactive antibodies' (cPRA) value. In this study, we investigated whether cPRA represent an immunological risk in times of sensitive and accurate determination of pre-transplant DSA. 527 consecutive transplantations were divided into four groups: cPRA 0% (n=250), cPRA 1-50% (n=129), cPRA 51-100% (n=43), and DSA (n=105)...
February 28, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28241186/distribution-and-quantity-of-sites-of-john-cunningham-virus-persistence-in-immunologically-healthy-patients-correlation-with-john-cunningham-virus-antibody-and-urine-john-cunningham-virus-dna
#13
Joseph R Berger, Craig S Miller, Robert J Danaher, Kathryn Doyle, Kenneth J Simon, Elizabeth Norton, Leonid Gorelik, Ellen Cahir-McFarland, Divya Singhal, Nawaz Hack, Joseph Ryan Owens, Peter T Nelson, Janna H Neltner
Importance: Although seroepidemiological studies indicate that greater than 50% of the population has been infected with John Cunningham virus (JCV), the sites of JCV persistence remain incompletely characterized. Objective: To determine sites of JCV persistence in immunologically healthy individuals. Design, Setting, and Participants: Tissue specimens from multiple sites including brain, renal, and nonrenal tissues were obtained at autopsy performed in the Department of Pathology at the University of Kentucky from 12 immunologically healthy patients between February 9, 2011, and November 27, 2012...
February 27, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28240590/a-meta-analysis-of-avascular-necrosis-in-systemic-lupus-erythematosus-prevalence-and-risk-factors
#14
Tatiana Nevskaya, Maeve P Gamble, Janet E Pope
OBJECTIVES: To determine the prevalence of and risk factors for avascular necrosis (AVN) in systemic lupus erythematosus (SLE). METHODS: MEDLINE, CINAHL, Web of Science, EMBASE and Cochrane Library were searched from inception to July, 2015 and a random effects model was used to combine frequencies; study quality was assessed using STROBE. RESULTS: 2,041 citations identified 62 articles. Many results had high heterogeneity. The prevalence of symptomatic AVN was 9% (range 0...
February 24, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28211304/granisetron-and-carvedilol-can-protect-experimental-rats-againstadjuvant-induced-arthritis
#15
Yasmin Moustafa Ahmed, Basim Anwar Shehata Messiha, Ali Ahmed Abo-Saif
CONTEXT: Rheumatoid arthritis (RA), a disabling autoimmune disorder of the joints as well as other organs, affects about 1% of population. Unfortunately, all current treatments of RA cause severe gastrointestinal, renal and other complications. OBJECTIVE: We aimed to evaluate the possible antiarthritic effects of a serotonin 5-HT3 receptor blocker, granisetron, and a nonselective adrenergic receptor blocker, carvedilol, on complete Freund's adjuvant-induced RA in adult female albino rats...
April 2017: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/28207630/clinical-trials-for-immunosuppression-in-transplantation-the-case-for-reform-and-change-in-direction
#16
Philip J O'Connell, Dirk Kuypers, Roslyn R Mannon, Michael Abecassis, Stephen Chadban, John S Gill, Barbara Murphy, Peter W Nickerson, Jesse D Schold, Peter Stock, Daniel Seron, Rita Alloway, Jonathan Bromberg, Klemens Budde, Stanley Jordan, Christophe Legendre, Carmen Lefaucheur, Minnie Sarwall, Dorry Segev, Mark D Stegall, Stefan G Tullius, Germaine Wong, E Steve Woodle, Nancy Ascher, Randall E Morris
Currently trials of immunosuppression in transplantation are in decline because their objectives remain focused on improving acute rejection rates and graft survival in the first 12 months. With 1 year renal graft survival rates of greater than 90% the best that can be hoped for is noninferiority trial outcomes compared to current standard of care. Current trial design is not leading to novel therapies improving long term outcomes and safety, and hence important unmet clinical needs in transplantation remain unanswered...
February 15, 2017: Transplantation
https://www.readbyqxmd.com/read/28207493/treatment-of-lupus-nephritis-current-paradigms-and-emerging-strategies
#17
Maria Dall'Era
PURPOSE OF REVIEW: Lupus nephritis is the most common organ-threatening manifestation of lupus and continues to result in end-stage renal disease. This review describes the contemporary treatment of lupus nephritis as well as emerging therapeutic strategies. RECENT FINDINGS: Lupus nephritis management consists of an initial (induction) phase and a maintenance (extended) phase in which steroids are used in combination with another immunosuppressive medication. Current treatments are incompletely effective and associated with substantial toxicity...
February 15, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/28176480/de-novo-thrombotic-microangiopathy-following-simultaneous-pancreas-and-kidney-transplantation-managed-with-eculizumab
#18
REVIEW
Lani Shochet, John Kanellis, Ian Simpson, Joseph Ta, William Mulley
Thrombotic microangiopathy (TMA) is a well-recognised complication following transplantation, often due to an underlying genetic predisposition, medications or rejection. The use of eculizumab in these settings has been previously described, but its role still remains to be clarified. A 45-year-old man, with a history of type 1 diabetes mellitus and subsequent end-stage kidney failure, presented for a simultaneous pancreas-kidney transplant. Immunologically, he was well matched with the donor, and he received standard induction immunosuppression including tacrolimus...
February 2017: Nephrology
https://www.readbyqxmd.com/read/28164136/the-role-of-humoral-alloreactivity-in-liver-transplantation-lessons-learned-and-new-perspectives
#19
REVIEW
Elaine Y Cheng
More than ten years after the initial description of the humoral theory of transplantation by Dr. Paul I. Terasaki, the significance of humoral alloimmunity in liver transplantation has yet to be clearly defined. The liver allograft has an inherent tolerogenic capacity which confers its resistance to cell-mediated as well as antibody-mediated rejection. Nevertheless, the protection against alloimmunity is not complete, and antibody-mediated tissue injury can occur in the liver graft under specific circumstances...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28151411/immunologic-effects-of-the-renin-angiotensin-system
#20
Steven D Crowley, Nathan P Rudemiller
Inappropriate activation of the renin-angiotensin system (RAS) exacerbates renal and vascular injury. Accordingly, treatment with global RAS antagonists attenuates cardiovascular risk and slows the progression of proteinuric kidney disease. By reducing BP, RAS inhibitors limit secondary immune activation responding to hemodynamic injury in the target organ. However, RAS activation in hematopoietic cells has immunologic effects that diverge from those of RAS stimulation in the kidney and vasculature. In preclinical studies, activating type 1 angiotensin (AT1) receptors in T lymphocytes and myeloid cells blunts the polarization of these cells toward proinflammatory phenotypes, protecting the kidney from hypertensive injury and fibrosis...
February 1, 2017: Journal of the American Society of Nephrology: JASN
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