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https://www.readbyqxmd.com/read/29326416/strategies-to-restore-adenosine-triphosphate-atp-level-after-more-than-20-hours-of-cold-ischemia-time-in-human-marginal-kidney-grafts
#1
Matteo Ravaioli, Maurizio Baldassare, Francesco Vasuri, Gianandrea Pasquinelli, Maristella Laggetta, Sabrina Valente, Vanessa De Pace, Flavia Neri, Antonio Siniscalchi, Chiara Zanfi, Valentina R Bertuzzo, Paolo Caraceni, Davide Trerè, Pasquale Longobardi, Antonio D Pinna
BACKGROUND The persisting organ shortage in the field of transplantation recommends the use of marginal kidneys which poorly tolerate ischemic damage. Adenosine triphosphate (ATP) depletion during cold ischemia time (CIT) is considered crucial for graft function. We tested different strategies of kidney perfusion before transplantation in the attempt to improve the technique. MATERIAL AND METHODS Twenty human discarded kidneys from donors after brain death and with at least 20 hours of CIT were randomized to the following experimental groups (treatment time three-hours at 4°C): a) static cold storage (CS); b) static cold hyperbaric oxygenation (Hyp); c) hypothermic perfusion (PE); d) hypothermic perfusion in hyperbaric oxygenation (PE-Hyp); and e) hypothermic oxygenated perfusion (PE-O2)...
January 12, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/29324518/the-dawn-of-liver-perfusion-machines
#2
Danielle Detelich, James F Markmann
PURPOSE OF REVIEW: Despite high demand, a severe shortage of suitable allografts limits the use of liver transplantation for the treatment of end-stage liver disease. The transplant community is turning to the utilization of high-risk grafts to fill the void. This review summarizes the reemergence of ex-vivo machine perfusion for liver graft preservation, including results of recent clinical trials and its specific role for reconditioning DCD, steatotic and elderly grafts. RECENT FINDINGS: Several phase-1 clinical trials demonstrate the safety and feasibility of machine perfusion for liver graft preservation...
January 9, 2018: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/29319810/the-second-phase-of-insulin-secretion-in-non-diabetic-islet-grafted-recipients-is-altered-and-can-predict-graft-outcome
#3
Orianne Villard, Jean Frédéric Brun, Lisa Bories, Nicolas Molinari, Pierre Yves Benhamou, Thierry Berney, Anne Wojtusciszyn
INTRODUCTION: Islet transplantation (IT) can treat patients with severely unstable type 1 diabetes. Pre-hepatic kinetics of insulin-secretion (ISec) in two phases can be calculated by C-peptide levels during meal tests. We propose to describe insulin secretion profile after a Mixed-Meal Tolerance Test (MMTT) in IT patients and to determine whether the calculated indexes of ISec can predict graft outcome. METHODS: We analyzed 34 MMTT among 11 patients who received an IT between 2011 and 2016 and compared them to healthy controls (C) and type 2 diabetic (T2D) patients...
January 8, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29317116/giant-coronary-aneurysm-culprit-of-an-acute-coronary-syndrome
#4
Iván J Núñez-Gil, Pedro Marcos Alberca, Nieves Gonzalo, Luis Nombela-Franco, Pablo Salinas, Antonio Fernández-Ortiz
A 66-year-old male ex-smoker with hypertension, type 2 diabetes mellitus and dyslipidaemia was admitted due to a non-ST segment elevation myocardial infarction. The catheterisation depicted an extensive and calcified disease: chronic total obstruction of the right coronary and severe disease with a giant aneurysm at the first marginal branch as the culprit vessel. After discussion, the right coronary was treated before the circumflex-giant aneurysm was closed with a stent graft and its multiple severe stenosis solved with two drug-eluting stents...
January 6, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29316230/propensity-score-based-comparison-of-the-graft-failure-risk-between-kidney-transplant-recipients-of-standard-and-expanded-criteria-donor-grafts-towards-increasing-the-pool-of-marginal-donors
#5
A H Querard, F Le Borgne, A Dion, M Giral, G Mourad, V Garrigue, L Rostaing, N Kamar, A Loupy, C Legendre, E Morelon, F Buron, Y Foucher, E Dantan
From a prospective and multicentric French cohort, we proposed an external validation study for the Expanded Criteria Donor (ECD), based on 4833 kidney recipients transplanted for the first time between 2000 and 2014. We estimated the subject-specific effect from a multivariable Cox model. We confirmed a 1.75-fold (95%CI from 1.53 to 2.00, p<0.0001) increase in graft failure risk if a given patient received an ECD graft compared to a graft from a donor with standard criteria (SCD). Complementarily, we estimated the population-average effect using propensity scores...
January 9, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29312714/off-vs-on-pump-coronary-artery-bypass-graft-surgery-on-hospital-outcomes-in-134-117-octogenarians
#6
Umberto Benedetto, Gianni D Angelini, Massimo Caputo, Dmitriy N Feldman, Luke K Kim, Christopher Lau, Antonino Di Franco, Leonard N Girardi, Mario Gaudino
Background: In octogenarian patients there is a potential for more tangible clinical benefits from off-pump coronary artery bypass (OPCAB) compared to conventional coronary artery bypass grafting (CABG) with cardiopulmonary bypass (CPB) (COCAB). We aimed to investigate whether, compared to COCAB, OPCAB is associated with better operative outcomes in octogenarians by analyzing the Nationwide Inpatient Sample (NIS) databases 2003-2011. Methods: Of the 134,117 discharge records from 797 hospitals analyzed of patients aged ≥80 years undergoing first time isolated CABG from 2003 to 2011, 70...
December 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29304080/local-vs-systemic-administration-of-bisphosphonates-in-rat-cleft-bone-graft-a-comparative-study
#7
Christine Hong, Alison Quach, Lawrence Lin, Jeffrey Olson, Taewoo Kwon, Olga Bezouglaia, Jaime Tran, Michael Hoang, Kimberly Bui, Reuben H Kim, Sotirios Tetradis
A majority of patients with orofacial cleft deformity requires cleft repair through a bone graft. However, elevated amount of bone resorption and subsequent bone graft failure remains a significant clinical challenge. Bisphosphonates (BPs), a class of anti-resorptive drugs, may offer great promise in enhancing the clinical success of bone grafting. In this study, we compared the effects of systemic and local delivery of BPs in an intraoral bone graft model in rats. We randomly divided 34 female 20-week-old Fischer F344 Inbred rats into four groups to repair an intraoral critical-sized defect (CSD): (1) Control: CSD without graft (n = 4); (2) Graft/Saline: bone graft with systemic administration of saline 1 week post-operatively (n = 10); (3) Graft/Systemic: bone graft with systemic administration of zoledronic acid 1 week post-operatively (n = 10); and (4) Graft/Local: bone graft pre-treated with zoledronic acid (n = 10)...
2018: PloS One
https://www.readbyqxmd.com/read/29302588/extraction-socket-sealing-using-palatal-gingival-grafts-and-resorbable-collagen-membranes
#8
Sang-Yun Kim, Young-Kyun Kim, Hyun-Suk Kim, Pil-Young Yun, Su-Gwan Kim, Yong-Hun Choi
Background: Socket sealing surgery is performed for the preservation of the form and volume of the soft tissue by covering the resulting socket with autogenous soft tissue graft or membrane barriers. This procedure is usually necessary to improve the esthetic results of the maxillary anterior or premolar areas. Methods: This study retrospectively investigated cases involving the open membrane technique or socket sealing surgery with a palatal gingival graft or collagen membrane where implant placement and bone grafting were performed immediately after tooth extraction...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29301219/liver-graft-susceptibility-during-static-cold-storage-and-dynamic-machine-perfusion-dcd-versus-fatty-livers
#9
Andrea Ferrigno, Laura G Di Pasqua, Clarissa Berardo, Veronica Siciliano, Vittoria Rizzo, Barbara Mannucci, Plinio Richelmi, Anna Cleta Croce, Mariapia Vairetti
We compared static preservation (cold storage, CS, 4 °C) with dynamic preservation (machine perfusion, MP, 20 °C) followed by reperfusion using marginal livers: a model of donation after cardiac death (DCD) livers and two models of fatty livers, the methionine-choline deficient (MCD) diet model, and obese Zucker (fa/fa) rats. CS injury in DCD livers was reversed by an oxygenated washout (OW): hepatic damage, bile flow, and the ATP/ADP ratio in the OW + CS group was comparable with the ratio obtained with MP...
December 31, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29296858/successful-desensitization-with-proteasome-inhibition-and-costimulation-blockade-in-sensitized-nonhuman-primates
#10
Jean Kwun, Christopher Burghuber, Miriam Manook, Brian Ezekian, Jaeberm Park, Janghoon Yoon, John S Yi, Neal Iwakoshi, Adriana Gibby, Jung Joo Hong, Alton B Farris, Allan D Kirk, Stuart J Knechtle
The detrimental effects of donor-directed antibodies in sensitized transplant patients remain a difficult immunologic barrier to successful organ transplantation. Antibody removal is often followed by rebound. Proteasome inhibitors (PIs) deplete antibody-producing plasma cells (PCs) but have shown marginal benefit for desensitization. In an allosensitized nonhuman primate (NHP) model, we observed increased germinal center (GC) formation after PI monotherapy, suggesting a compensatory PC repopulation mediated via GC activation...
November 14, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296768/patient-derived-xenografts-of-low-grade-b-cell-lymphomas-demonstrate-roles-of-the-tumor-microenvironment
#11
W Richard Burack, Janice M Spence, John P Spence, Stephen A Spence, Philip J Rock, Gautam N Shenoy, Leonard D Shultz, Richard B Bankert, Steven H Bernstein
To discern features of non-Hodgkin lymphomas (NHL) that are autonomous from those that are shaped by the tumor environment (TE), we used patient-derived xenografts (PDX) to probe the effects on neoplastic cells of manipulating the TE. Properties of neoplastic cells that are often considered to be autonomous include their relative independence from stromal support, their relative survival and/or proliferation advantages compared with nonneoplastic cells, and their state of differentiation. Prior approaches to creation of PDX models likely select for neoplasms, which are the most capable of engraftment, potentially masking the effects of the TE...
July 11, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296723/atg-vs-thiotepa-with-busulfan-and-cyclophosphamide-in-matched-related-bone-marrow-transplantation-for-thalassemia
#12
Lawrence Faulkner, Cornelio Uderzo, Sadaf Khalid, Priya Marwah, Rajpreet Soni, Naila Yaqub, Samina Amanat, Itrat Fatima, Sarah Khan Gilani, Tatheer Zahra, Stalin Ramprakash, Lallindra Gooneratne, Ruwangi Dissanayake, Senani Williams, Wasantha Rathnayake, Reshma Srinivas, Amit Sedai, Ankita Kumari, Lailith Parmar, Rakesh Dhanya, Rajat Kumar Agarwal
Matched-related bone marrow transplantation (BMT) may cure >80% of low-risk children with severe thalassemia (ST). Very long-term follow-up studies have shown how the standard busulfan-cyclophosphamide (BuCy) regimen may be associated with normalization of health-related quality of life, no second malignancies in the absence of chronic graft-versus-host disease, and fertility preservation in many patients. However, because BuCy may be associated with high rejection rates, some centers incorporate thiotepa (Tt) in busulfan- or treosulfan-based regimens, a combination that may increase the risk of permanent infertility...
May 23, 2017: Blood Advances
https://www.readbyqxmd.com/read/29284945/comparison-of-marginal-periosteal-pedicle-graft-and-bioactive-glass-with-platelet-rich-fibrin-and-bioactive-glass-in-the-treatment-of-intrabony-defects-a-clinicoradiographic-study
#13
M S Yasaswini, K V Prabhakara Rao, P Tanuja, Narendra Reddy Motakatla
Introduction and Objectives: The objective of the study was to compare clinically and radiographically the regenerative potential of marginal periosteal pedicle graft (MPPG) or platelet-rich fibrin (PRF) with a bioactive glass in the treatment of two- and three-wall intrabony defects. Methods: A total of 28 sites (bilateral or contralateral infrabony defects) from 14 patient were treated with MPPG (Experimental site A) and the other site was treated with PRF (Experimental site B)...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29280750/long-term-topical-diquafosol-tetrasodium-treatment-of-dry-eye-disease-caused-by-chronic-graft-versus-host-disease-a-retrospective-study
#14
Mio Yamane, Yoko Ogawa, Masaki Fukui, Mizuka Kamoi, Miki Uchino, Yumiko Saijo-Ban, Naoyuki Kozuki, Shin Mukai, Takehiko Mori, Shinichiro Okamoto, Kazuo Tsubota
OBJECTIVES: The aim of this study was to assess the safety and efficacy of long-term use of 3% diquafosol ophthalmic solution (DQS), an eye drop for mucin production and water secretion, for treating dry eye disease (DED) caused by chronic graft-versus-host disease (cGVHD). METHODS: We retrospectively evaluated the safety and efficacy of DQS in 10 patients with mild to moderate cGVHD-induced DED. The efficacy was assessed by (1) degree of symptoms, (2) Schirmer I test value, (3) tear film breakup time (TFBUT), and (4) fluorescein and rose bengal scores...
December 26, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29274151/preliminary-evaluation-of-near-infrared-vein-visualization-technology-in-the-screening-of-palatal-blood-vessels
#15
E Yaprak, S Kayaalti-Yuksek
BACKGROUND: Avoidance from palatal blood vessel rupture is a major concern during the palatal soft tissue graft surgery. There is no defined chair-side and case-specific palatal blood vessel detection approach to facilitate the harvesting process. The objective of this pilot study is to assess the feasibility of a near-infrared vein visualization system in the screening process of palatal blood vessels. MATERIAL AND METHODS: An extraoral vein visualization device (AccuVein AV400) was applied to a total of 304 hemi-maxilla of 152 individuals by two blind examiners...
December 23, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29258699/local-control-for-vaginal-botryoid-rhabdomyosarcoma-with-prerectal-transperineal-surgical-resection-and-autologous-buccal-graft-vaginal-replacement-a-novel-minimally-invasive-radiation-sparing-approach
#16
Jennifer G Michlitsch, Rodrigo L P Romao, Joseph M Gleason, Luis H Braga, Lisa Allen, Abha Gupta, Armando J Lorenzo
PURPOSE: Localized vaginal rhabdomyosarcoma (RMS) is associated with a favorable prognosis, but strategies for local control remain controversial. The use of radiotherapy (RT) can have important long-term sequelae, while traditional resection involves major reconstructive surgery. We describe a new surgical approach employing a minimally-invasive resection and immediate reconstruction. MATERIALS AND METHODS: Records from 4 consecutive patients with localized vaginal RMS managed in 4 major pediatric referral centers were reviewed...
November 21, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29245335/spontaneous-corneal-perforation-in-terrien-s-marginal-degeneration-in-childhood-a-case-report
#17
Junkyu Chung, Kyung Hyun Jin, Jaheon Kang, Tae Gi Kim
RATIONALE: Terrien's marginal corneal degeneration (TMD) is characterized by progressive peripheral corneal thinning. It appears primarily above the age of 40 years and is rare at younger ages. Spontaneous corneal perforation in TMD is a rare, but serious complication that may occur in childhood. PATIENT CONCERNS: This review presents the case of a 16-year-old girl presented with blurred vision in the right eye on awakening in the morning. Slit-lamp examination revealed superior corneal thinning with a corneal perforation...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29243685/the-efficacy-of-short-6-mm-dental-implants-with-a-novel-thread-design
#18
Soheil Bechara, Tatjana Nimčenko, Ričardas Kubilius
OBJECTIVE: To assess efficacy of short (6 mm) implants with a novel macrostructure and thread design placed in a compromised bone situations of edentulous posterior regions of maxilla (3-4 mm of bone height under sinus floor) as compared to results of clinical situations treated with simultaneous maxillary sinus grafting and placement of long (≥10 mm) implants of the same company. STUDY DESIGN: Clinical cases of conducted clinical study. PATIENTS AND METHODS: Patients with compromised bone height in edentulous posterior regions of maxilla were randomly divided into two groups...
2017: Stomatologija
https://www.readbyqxmd.com/read/29243390/aquaporin-4-blockade-improves-survival-of-murine-heart-allografts-subjected-to-prolonged-cold-ischemia
#19
Katayoun Ayasoufi, Naoki Kohei, Michael Nicosia, Ran Fan, George W Farr, Paul R McGuirk, Marc F Pelletier, Robert L Fairchild, Anna Valujskikh
Prolonged cold ischemia storage (CIS) is a leading risk factor for poor transplant outcome. Existing strategies strive to minimize IRI in transplanted organs, yet there is a need for novel approaches to improve outcomes of marginal allografts and expand the pool of donor organs suitable for transplantation. Aquaporins (AQPs) are a family of water channels that facilitate homeostasis, tissue injury and inflammation. We tested whether inhibition of AQP4 improves the survival of fully MHC-mismatched murine cardiac allografts subjected to 8 h CIS...
December 15, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/29240608/metabolic-profile-of-ex-vivo-lung-perfusate-yields-biomarkers-for-lung-transplant-outcomes
#20
Michael K Hsin, Ricardo Zamel, Marcelo Cypel, David Wishart, Beomsoo Han, Shaf Keshavjee, Mingyao Liu
OBJECTIVE: To identify potential biomarkers during ex vivo lung perfusion (EVLP) using metabolomics approach. SUMMARY BACKGROUND DATA: EVLP increases the number of usable donor lungs for lung transplantation (LTx) by physiologic assessment of explanted marginal lungs. The underlying paradigm of EVLP is the normothermic perfusion of cadaveric lungs previously flushed and stored in hypothermic preservation fluid, which allows the resumption of active cellular metabolism and respiratory function...
January 2018: Annals of Surgery
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