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https://www.readbyqxmd.com/read/29150986/memory-t-cells-are-significantly-increased-in-rejecting-liver-allografts-of-rhesus-monkeys
#1
Hwajung Kim, Hyeyoung Kim, Sun-Kyung Lee, Xue-Li Jin, Tae Jin Kim, Chanho Park, Jae-Il Lee, Hyo-Sin Kim, Suk Kyun Hong, Kyung Chul Yoon, Sung Woo Ahn, Kyoung-Bun Lee, Nam-Joon Yi, Jaeseok Yang, Kwang-Woong Lee, Wayne J Hawthorne, Kyung-Suk Suh
INTRODUCTION: The Rhesus monkey (RM) is an excellent preclinical model in kidney, heart and islet transplantation that has provided the basis for new immunosuppressive protocols for clinical studies. However, there remain relatively few liver transplantation (LT) models in nonhuman primates. In this study, we analyzed the immune cell populations of PBMCs and secondary lymphoid organs along with livers of normal rhesus monkeys and compared them to those of rejecting liver transplanted recipient's following withdrawal of immunosuppression...
November 18, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/29143065/-complex-joint-reconstruction-and-joint-transplantation-with-the-flocsat-concept-planning-and-surgical-implementation
#2
REVIEW
C Krettek, J-D Clausen, C Neunaber
Cartilage defects in adult patients are so far incurable. Fresh osteochondral allograft (OCA) transplantation is based on the insertion of mature, living, mechanically sound hyaline cartilage into an osteochondral defect where it undergoes osseointegration. Intact hyaline cartilage of OCA does not cause immune reactions in the recipient. Many reports show that small OCA have good osseointegration and show good long-term results. These observations have been incorporated into the development of the fresh large (> 10 cm(2)) osteochondral shell allograft transplantation (FLOCSAT) concept, which is based on the following principles: 1) the thickness of the osseous layer should be kept as thin as possible (target < 6-8 mm) so that the transplant remains stable and fixable...
November 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29138892/-partial-and-complete-joint-transplantation-with-fresh-osteochondral-allografts-the-flocsat-concept
#3
REVIEW
C Krettek, J-D Clausen, N Bruns, C Neunaber
Cartilage defects in adult patients do not heal well. Fresh osteochondral allograft (OCA) transplantation is based on mature, living, mechanically sound hyaline cartilage attached to a bone interface, which is brought into an osteochondral defect, where it becomes osseointegrated. According to current knowledge, intact hyaline cartilage tissue is immune privileged and does not, in contrast to bone, meniscus or ligaments, cause an immune reaction. The technique has the unique advantage of transplanting viable, mature and mechanically stable hyaline cartilage into the affected area...
November 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29135830/tissue-resident-lymphocytes-in-solid-organ-transplantation-innocent-passengers-or-the-key-to-organ-transplant-survival
#4
Amy C Prosser, Axel Kallies, Michaela Lucas
Short-term outcomes of solid organ transplantation have improved dramatically over the past several decades; however, long-term survival has remained static over the same time period, and chronic rejection remains a major cause of graft failure. The importance of donor, or 'passenger', lymphocytes to the induction of tolerance to allografts was recognized in the 1990s; however, their precise contribution to graft acceptance or rejection has not been elucidated. Recently, specialized populations of tissue-resident lymphocytes in nonlymphoid organs have been described...
November 14, 2017: Transplantation
https://www.readbyqxmd.com/read/29125712/lipid-metabolism-and-functional-assessment-of-discarded-human-livers-with-steatosis-undergoing-24-hours-normothermic-machine-perfusion
#5
Qiang Liu, Ahmed Nassar, Laura Buccini, Giuseppe Iuppa, Basem Soliman, Daniele Pezzati, Ahmed Hassan, Matthew Blum, William Baldwin, Ana Bennett, Kenneth Chavin, Toshihiro Okamoto, Teresa Diago Uso, John Fung, Kareem Abu-Elmagd, Charles Miller, Cristiano Quintini
Normothermic machine perfusion (NMP) is an emerging technology to preserve liver allografts more effectively than cold storage (CS). However, little is known about the effect of NMP on steatosis, and the markers indicative of hepatic quality during NMP. To address these points we perfused 10 discarded human livers with oxygenated NMP for 24 hours after 4-6 hours of CS. All livers had variable degree of steatosisat at baseline. The perfusate consisted of packed red blood cells and fresh frozen plasma. Perfusate analysis showed an increase in triglyceride levels from the 1st hour (median 127 mg/dL; interquartile range 95-149) to 24th hour of perfusion (203;171-304) (p=0...
November 10, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/29122645/interleukin-33-levels-are-elevated-in-chronic-allograft-dysfunction-of-kidney-transplant-recipients-and-promotes-epithelial-to-mesenchymal-transition-of-human-kidney-hk-2-cells
#6
Zhen Xu, Chunchun Zhao, Zijie Wang, Jun Tao, Zhijian Han, Wei Zhang, Ruoyun Tan, Min Gu
This study is aimed to investigate the potential role of interleukin (IL)-33 in transplanted kidney interstitial fibrosis and the associated mechanism. Serum IL-33 levels were detected using an enzyme-linked immunosorbent assay (ELISA) in healthy volunteers, stable kidney transplantation recipients (KTRs) (stable), KTRs with acute rejection (AR), and KTRs with chronic allograft dysfunction (CAD) (CAD). Immunohistochemical (IHC) staining, Western blotting, and quantitative real-time PCR (qRT-PCR) were used to detect the expression of IL-33 in human kidney tissues obtained from control and CAD patients...
November 6, 2017: Gene
https://www.readbyqxmd.com/read/29116389/development-of-cd3-cell-quantitation-algorithms-for-renal-allograft-biopsy-rejection-assessment-utilizing-open-source-image-analysis-software
#7
Andres Moon, Geoffrey H Smith, Jun Kong, Thomas E Rogers, Carla L Ellis, Alton B Brad Farris
Renal allograft rejection diagnosis depends on assessment of parameters such as interstitial inflammation; however, studies have shown interobserver variability regarding interstitial inflammation assessment. Since automated image analysis quantitation can be reproducible, we devised customized analysis methods for CD3+ T-cell staining density as a measure of rejection severity and compared them with established commercial methods along with visual assessment. Renal biopsy CD3 immunohistochemistry slides (n = 45), including renal allografts with various degrees of acute cellular rejection (ACR) were scanned for whole slide images (WSIs)...
November 8, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/29115567/preparation-and-characterization-of-acellular-adipose-tissue-matrix-using-a-combination-of-physical-and-chemical-treatments
#8
Mei Song, Yi Liu, Ling Hui
Decellularized adipose extracellular matrix (ECM) has been used in the clinic to support the regeneration of adipose tissues. The methods used to produce adipose tissue ECM scaffolds exhibit distinct effects upon the structural and functional components of the resultant scaffold material. The current study presents an acellular ECM scaffold from human adipose tissues derived using successive physical and chemical treatments, including repeated freeze‑thaw cycles followed by centrifugation, polar solvent extraction and enzymatic digestion...
October 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29108972/involvement-of-clip-domain-serine-protease-in-the-anti-vibrio-immune-response-of-abalone-haliotis-discus-hannai-molecular-cloning-characterization-and-functional-analysis
#9
Jian-Jian Hu, Yu-Lei Chen, Xue-Kun Duan, Teng-Chuan Jin, Yue Li, Ling-Jing Zhang, Guang-Ming Liu, Min-Jie Cao
Vibrio parahemolyticus (V. parahemolyticus) is a major pathogen for abalone, an important economical shellfish in coastal area of China. There is little known about the abalone innate immune system against pathogen infection. Clip-domain serine proteases (cSPs) are increasingly recognized to play important roles in host immune defense in invertebrates. In this study, we cloned a cSP (Hdh-cSP) from abalone (Haliotis discus hannai). We found out that Hdh-cSP was widely expressed in multiple tissues of abalone, with highest level in the immune-like organ, hepatopancreas...
November 3, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29100944/regulatory-dendritic-cells-for-promotion-of-liver-transplant-operational-tolerance-rationale-for-a-clinical-trial-and-accompanying-mechanistic-studies
#10
REVIEW
Angus W Thomson, Abhinav Humar, Fadi G Lakkis, Diana M Metes
Dendritic cells (DC) are rare, bone marrow (BM)-derived innate immune cells that critically maintain self-tolerance in the healthy steady-state. Regulatory DC (DCreg) with capacity to suppress allograft rejection and promote transplant tolerance in pre-clinical models can readily be generated from BM precursors or circulating blood monocytes. These DCreg enhance allograft survival via various mechanisms, including promotion of regulatory T cells. In non-human primates receiving minimal immunosuppressive drug therapy (IS), infusion of DCreg of donor origin, one week before transplant, safely prolongs renal allograft survival and selectively attenuates anti-donor CD8(+) memory T cell responses in the early post-transplant period...
October 31, 2017: Human Immunology
https://www.readbyqxmd.com/read/29099734/combined-conjunctival-limbal-autografts-and-living-related-conjunctival-limbal-allografts-for-severe-unilateral-ocular-surface-failure
#11
Albert Y Cheung, Enrica Sarnicola, Amit Govil, Edward J Holland
PURPOSE: To describe the technique and present 2 cases of a combined conjunctival limbal autograft (CLAU) and living-related conjunctival limbal allograft (lr-CLAL) procedure for treatment of severe unilateral ocular surface failure. METHODS: Interventional case series of 2 eyes of 2 patients sustaining severe thermal/chemical injuries from firework explosions. They both underwent the combined CLAU/lr-CLAL procedure followed by penetrating keratoplasty. Systemic immunosuppression consisted of oral tacrolimus and mycophenolate mofetil...
December 2017: Cornea
https://www.readbyqxmd.com/read/29099650/new-insights-into-graft-versus-host-disease-and-graft-rejection
#12
Eric Perkey, Ivan Maillard
Allogeneic transplantation of foreign organs or tissues has lifesaving potential, but can lead to serious complications. After solid organ transplantation, immune-mediated rejection mandates the use of prolonged global immunosuppression and limits the life span of transplanted allografts. After bone marrow transplantation, donor-derived immune cells can trigger life-threatening graft-versus-host disease. T cells are central mediators of alloimmune complications and the target of most existing therapeutic interventions...
November 3, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29095788/is-bone-graft-or-guided-bone-regeneration-needed-when-placing-immediate-dental-implants-a-systematic-review
#13
Hania AlKudmani, Reham Al Jasser, Sebastiano Andreana
AIMS: To systematically review the effect and type of bone graft and guided bone regeneration around immediate implants on hard and soft tissue changes. METHODS: Three electronic databases were searched up to June 2015. Outcomes consisted of hard and soft tissue dimensional changes. RESULTS: Eight studies were included according to inclusion criteria. Immediate implants with bone grafting had superior soft tissue stability and preserved horizontal ridge dimension and buccal plate thickness, when compared to no grafting...
November 1, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29095784/use-of-bone-allograft-with-or-without-bone-marrow-aspirate-concentrate-in-appositional-reconstructions-a-tomographic-and-histomorphometric-study
#14
Suelen Castro Lavareda Corrêa, Juliana Elias de Sousa, Paulo José Pasquali, Luís Guilherme Scavone de Macedo, Antonio Carlos Aloise, Marcelo Lucchesi Teixeira, André Antonio Pelegrine
OBJECTIVES: To evaluate bone allograft associated to bone marrow aspirate concentrate (BMAC), in maxillary reconstructions. MATERIALS AND METHODS: Ten patients with alveolar bone deficiency in the anterior maxilla were randomly divided into control group (CG) and test group (TG). A bone block allograft was placed in both groups, but the graft was impregnated with BMAC only in TG. Computed tomography was performed 7 days (T1) and 6 months (T2) after the grafting procedure, and volume and bone density measurements were carried out...
November 1, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29095664/graphene-based-scaffolds-on-bone-tissue-engineering
#15
Nasrin Shadjou, Mohammad Hasanzadeh, Balal Khalilzadeh
Tissue engineering has been emerging as a valid approach to the current therapies for bone regeneration/substitution. Tissue-engineered bone constructs have the potential to alleviate the demand arising from the shortage of suitable autograft and allograft materials for augmenting bone healing. Scaffolds play a central role in tissue engineering research, they not only provide as structural support for specific cells but also provide as the templates to guide new tissue growth and construction. In this survey we describe application of graphene based nano-biomaterials for bone tissue engineering...
November 2, 2017: Bioengineered
https://www.readbyqxmd.com/read/29093738/comparative-effectiveness-of-bone-grafting-using-xenograft-freeze-dried-cortical-bovine-allograft-freeze-dried-cortical-new-zealand-white-rabbit-xenograft-hydroxyapatite-bovine-and-xenograft-demineralized-bone-matrix-bovine-in-bone-defect-of-femoral-diaphysis
#16
Ferdiansyah Mahyudin, Dwikora Novembri Utomo, Heri Suroto, Tri Wahyu Martanto, Mouli Edward, Imelda Lumban Gaol
Autogenous bone graft is gold standard in treating bone defects, but it might have difficulty in corporation and rejection reaction. This study is to compare the effectiveness among freeze-dried xenograft, freeze-dried allograft, hydroxyapatite xenograft, and demineralized bone matrix xenograft as bone graft to fill bone defect in femoral diaphysis of white rabbit. Thirty male New Zealand white rabbits were distributed into five groups. Bone defect was filled correspondingly with xenograft freeze-dried cortical bovine, allograft freeze-dried cortical New Zealand white rabbit, xenograft hydroxyapatite bovine, and xenograft demineralized bone matrix bovine...
2017: International Journal of Biomaterials
https://www.readbyqxmd.com/read/29078657/materials-and-techniques-in-chest-wall-reconstruction-a-review
#17
REVIEW
Stefano Sanna, Jury Brandolini, Alessandro Pardolesi, Desideria Argnani, Marta Mengozzi, Andrea Dell'Amore, Piergiorgio Solli
Extensive chest wall resection and reconstruction are a challenging procedure that requires a multidisciplinary approach, including input from thoracic surgeon, plastic surgeon and oncologist. In particular chest wall neoplastic pathology is associated with high surgical morbidity and can result in full thickness defects hard to reconstruct. The goals of a successful chest wall reconstruction are to restore the chest wall rigidity, preserve pulmonary mechanic and protect the intrathoracic organs minimizing the thoracic deformity...
2017: J Vis Surg
https://www.readbyqxmd.com/read/29075262/clinical-tolerogenic-dendritic-cells-exploring-therapeutic-impact-on-human-autoimmune-disease
#18
REVIEW
Brett Eugene Phillips, Yesica Garciafigueroa, Massimo Trucco, Nick Giannoukakis
Tolerogenic dendritic cell (tDC)-based clinical trials for the treatment of autoimmune diseases are now a reality. Clinical trials are currently exploring the effectiveness of tDC to treat autoimmune diseases of type 1 diabetes mellitus, rheumatoid arthritis, multiple sclerosis (MS), and Crohn's disease. This review will address tDC employed in current clinical trials, focusing on cell characteristics, mechanisms of action, and clinical findings. To date, the publicly reported human trials using tDC indicate that regulatory lymphocytes (largely Foxp3+ T-regulatory cell and, in one trial, B-regulatory cells) are, for the most part, increased in frequency in the circulation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29073905/therapeutic-application-of-t-regulatory-cells-in-composite-tissue-allotransplantation
#19
REVIEW
Jeong-Hee Yang, Seok-Chan Eun
With growing number of cases in recent years, composite tissue allotransplantation (CTA) has been improving the quality of life of patient who seeks reconstruction and repair of damaged tissues. Composite tissue allografts are heterogeneous. They are composed of a variety of tissue types, including skin, muscle, vessel, bone, bone marrow, lymph nodes, nerve, and tendon. As a primary target of CTA, skin has high antigenicity with a rich repertoire of resident cells that play pivotal roles in immune surveillance...
October 26, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29073551/medial-opening-wedge-high-tibial-osteotomy-in-patients-with-posttraumatic-medial-tibial-plateau-bone-defect-a-case-report
#20
Yoon Young Choi, Seung Joon Rhee
INTRODUCTION: Traumatic uncontained bone defect in the knee joint is one of the most serious knee injuries. As the knee joint is the main weight-bearing joint of the body, the problem of weight loading should be addressed while restoring the bone defect. However, no consensus exists regarding the treatment of this injury. PRESENTATION OF CASE: Two patients in separate cases initially sustained traumatic uncontained proximal tibial bone defects secondary to passenger traffic accidents...
October 18, 2017: International Journal of Surgery Case Reports
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