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Antit S, Charfeddine S, Hassine M, Nasraoui W, Messoudi Y, Abbes M, Sdiri W, Naji A, Zakhama L, Mourali S, Abid L, Ouali S, Ben Halima A. Association between atrial fibrillation symptoms and patient outcome. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2019.09.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Affiliation(s)
- M. R. Rickels
- Department of Medicine, Division of Endocrinology, Diabetes & Metabolism, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - E. Markmann
- Department of Surgery, Division of Transplantation, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - A. Naji
- Department of Surgery, Division of Transplantation, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
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Habertheuer A, Korutla L, Rostami S, Siddiqui S, Xin Y, Rizi R, Naji A, Zielinski P, Hu R, Ochiya T, Vallabhajosyula P. Donor Lung Specific Exosome Profiles for Noninvasive Monitoring of Acute Rejection in a Rat Orthotopic Left Lung Transplant Model. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Korutla L, Habertheuer A, Hu R, Zielinski P, Reddy S, Naji A, Vallabhajosyula P. Characterization of Circulating Donor Heart Specific Exosomes in Clinical Heart Transplantation. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Ansite J, Balamurugan AN, Barbaro B, Battle J, Brandhorst D, Cano J, Chen X, Deng S, Feddersen D, Friberg A, Gilmore T, Goldstein JS, Holbrook E, Khan A, Kin T, Lei J, Linetsky E, Liu C, Luo X, McElvaney K, Min Z, Moreno J, O'Gorman D, Papas KK, Putz G, Ricordi C, Szot G, Templeton T, Wang L, Wilhelm JJ, Willits J, Wilson T, Zhang X, Avila J, Begley B, Cano J, Carpentier S, Holbrook E, Hutchinson J, Larsen CP, Moreno J, Sears M, Turgeon NA, Webster D, Deng S, Lei J, Markmann JF, Bridges ND, Czarniecki CW, Goldstein JS, Putz G, Templeton T, Wilson T, Eggerman TL, Al-Saden P, Battle J, Chen X, Hecyk A, Kissler H, Luo X, Molitch M, Monson N, Stuart E, Wallia A, Wang L, Wang S, Zhang X, Bigam D, Campbell P, Dinyari P, Kin T, Kneteman N, Lyon J, Malcolm A, O'Gorman D, Onderka C, Owen R, Pawlick R, Richer B, Rosichuk S, Sarman D, Schroeder A, Senior PA, Shapiro AMJ, Toth L, Toth V, Zhai W, Johnson K, McElroy J, Posselt AM, Ramos M, Rojas T, Stock PG, Szot G, Barbaro B, Martellotto J, Oberholzer J, Qi M, Wang Y, Bayman L, Chaloner K, Clarke W, Dillon JS, Diltz C, Doelle GC, Ecklund D, Feddersen D, Foster E, Hunsicker LG, Jasperson C, Lafontant DE, McElvaney K, Neill-Hudson T, Nollen D, Qidwai J, Riss H, Schwieger T, Willits J, Yankey J, Alejandro R, Corrales AC, Faradji R, Froud T, Garcia AA, Herrada E, Ichii H, Inverardi L, Kenyon N, Khan A, Linetsky E, Montelongo J, Peixoto E, Peterson K, Ricordi C, Szust J, Wang X, Abdulla MH, Ansite J, Balamurugan AN, Bellin MD, Brandenburg M, Gilmore T, Harmon JV, Hering BJ, Kandaswamy R, Loganathan G, Mueller K, Papas KK, Pedersen J, Wilhelm JJ, Witson J, Dalton-Bakes C, Fu H, Kamoun M, Kearns J, Li Y, Liu C, Luning-Prak E, Luo Y, Markmann E, Min Z, Naji A, Palanjian M, Rickels M, Shlansky-Goldberg R, Vivek K, Ziaie AS, Fernandez L, Kaufman DB, Zitur L, Brandhorst D, Friberg A, Korsgren O. Purified Human Pancreatic Islets, CIT Culture Media with Lisofylline or Exenatide. CellR4 Repair Replace Regen Reprogram 2017; 5:e2377. [PMID: 30613755 PMCID: PMC6319648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
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Rossidis A, Lim MA, Palmer M, Levine MH, Naji A, Bloom RD, Abt PL. Kidney Transplantation From a Donor With Sickle Cell Disease. Am J Transplant 2017; 17:569-571. [PMID: 27664974 PMCID: PMC5441560 DOI: 10.1111/ajt.14063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 08/29/2016] [Accepted: 09/13/2016] [Indexed: 01/25/2023]
Abstract
In the United States, >100 000 patients are waiting for a kidney transplant. Given the paucity of organs available for transplant, expansion of eligibility criteria for deceased donation is of substantial interest. Sickle cell disease (SCD) is viewed as a contraindication to kidney donation, perhaps because SCD substantially alters renal structure and function and thus has the potential to adversely affect multiple physiological processes of the kidney. To our knowledge, transplantation from a donor with SCD has never been described in the literature. In this paper, we report the successful transplantation of two kidneys from a 37-year-old woman with SCD who died from an intracranial hemorrhage. Nearly 4 mo after transplant, both recipients are doing well and are off dialysis. The extent to which kidneys from donors with SCD can be safely transplanted with acceptable outcomes is unknown; however, this report should provide support for the careful expansion of kidneys from donors with SCD without evidence of renal dysfunction and with normal tissue architecture on preimplantation biopsies.
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Affiliation(s)
- A. Rossidis
- Department of Surgery, The Hospital of the University of Pennsylvania, Philadelphia, PA
| | - M. A. Lim
- Division of Nephrology, Department of Medicine, The Hospital of the University of Pennsylvania, Philadelphia, PA
| | - M. Palmer
- Department of Pathology and Laboratory Medicine, The Hospital of the University of Pennsylvania, Philadelphia, PA
| | - M. H. Levine
- Department of Surgery, The Hospital of the University of Pennsylvania, Philadelphia, PA
| | - A. Naji
- Department of Surgery, The Hospital of the University of Pennsylvania, Philadelphia, PA
| | - R. D. Bloom
- Division of Nephrology, Department of Medicine, The Hospital of the University of Pennsylvania, Philadelphia, PA
| | - P. L. Abt
- Department of Surgery, The Hospital of the University of Pennsylvania, Philadelphia, PA,Corresponding author: Peter L. Abt,
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Soleimanpour SA, Sekiguchi DR, LaRosa DF, Luning Prak ET, Naji A, Rickels MR. Hypersensitivity to rabbit antithymocyte globulin in an islet transplant recipient: a case report. Transplant Proc 2014; 43:3302-6. [PMID: 22099783 DOI: 10.1016/j.transproceed.2011.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE The aim was to describe a case of hypersensitivity to rabbit antithymocyte globulin (rATG) occurring in the context of islet transplantation. METHODS A 36-year-old woman with type 1 diabetes was admitted for islet transplantation. rATG was administered the first day (1.5 mg/kg) with methylprednisolone (2 mg/kg), and on the second day (1.5 mg/kg) without glucocorticoid to avoid potential toxicity to the anticipated islet transplant. RESULTS At the end of the rATG infusion on the second day she developed hives over her face, chest, and back and tender erythema at her intravenous site (Arthus reaction). Islet transplantation was not performed. She reported exposure to a pet rabbit for 2 years in childhood. Overnight, fever developed and the rash evolved into an erythematous morbilliform eruption affecting the torso. Serum high-sensitivity C-reactive protein (hsCRP) and the erythrocyte sedimentation rate (ESR) were elevated; serum complements C3 and C4 were normal. She received prednisone (50 mg) with subsequent resolution of the rash. Nine days after her initial reaction, she developed a recurrence of the rash and fever with arthralgias; levels of C3 and C4 had fallen. Methylprednisolone (125 mg, twice) was required for symptom improvement, and was gradually tapered as prednisone over the next 4 weeks with resolution of the complement, ESR, and hsCRP abnormalities. Five months after the initial attempt at islet transplantation, she returned to receive 7,879 IE/kg via portal vein infusion under basiliximab, etanercept, tacrolimus, and sirolimus immunosuppression and has required no to low-dose (0.1 U/kg/d) insulin to maintain near-normal glycemic control for > 12 months after transplantation. CONCLUSIONS Our patient's initial hypersensitivity reaction to rATG was followed by immune-complex type 3 hypersensitivity (serum sickness) requiring high-dose glucocorticoids. Canceling the initial islet infusion proved to be wise, and the patient subsequently did well with islet transplantation under an alternative induction agent.
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Affiliation(s)
- S A Soleimanpour
- Division of Endocrinology, Diabetes, and Metabolism, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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Ricordi C, Hering B, Bridges N, Eggerman T, Naji A, Posselt A, Stock P, Kaufman D, Larsen C, Turgeon N, Oberholzer J, Barbaro B, Korsgren O, Markmann J, Alejandro R, Rickels M, Senior P, Luo X, Zhang X, Bellin M, Lei J, Clarke W, Hunsicker L, Goldstein J, Czarniecki C, Priore A, Green N, Shapiro A. Completion of the first FDA phase 3 multicenter trial of Islet transplantation in type 1 diabetes by the NIH CIT consortium. Cytotherapy 2014. [DOI: 10.1016/j.jcyt.2014.01.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Boroudjerdi H, Naji A, Naji A, Netz R. Global analysis of the ground-state wrapping conformation of a charged polymer on an oppositely charged nano-sphere. Eur Phys J E Soft Matter 2014; 37:21. [PMID: 24676863 DOI: 10.1140/epje/i2014-14021-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 02/28/2014] [Accepted: 03/03/2014] [Indexed: 06/03/2023]
Abstract
We investigate the wrapping conformations of a single, strongly adsorbed polymer chain on an oppositely charged nano-sphere by employing a reduced (dimensionless) representation of a primitive chain-sphere model. This enables us to determine the global behavior of the chain conformation in a wide range of values for the system parameters including the chain contour length, its linear charge density and persistence length as well as the nano-sphere charge and radius, and also the salt concentration in the bathing solution. The structural behavior of a charged chain-sphere complex can be described in terms of a few distinct conformational symmetry classes separated by continuous or discontinuous transition lines which are determined by means of appropriately defined (order) parameters. Our results can be applied to a wide class of strongly coupled polymer-sphere complexes including, for instance, complexes that comprise a mechanically flexible or semiflexible polymer chain or an extremely short or long chain and, as a special case, include the biologically relevant example of DNA-histone complexes.
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Affiliation(s)
- Hoda Boroudjerdi
- Fachbereich Physik, Freie Universität Berlin, Arnimalle 14, 14195, Berlin, Germany
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Redfield RR, Abt PL, Naji A. A case for APRIL/BLyS directed therapy not eosinophil directed therapy for alloantibody elimination. Am J Transplant 2014; 14:492-3. [PMID: 24320568 DOI: 10.1111/ajt.12576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- R R Redfield
- Department of Transplant Surgery, University of Wisconsin Hospital and Clinics, Madison, WI
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Hsu JW, Reese PP, Naji A, Levine MH, Abt PL. Inferior early posttransplant outcomes for recipients of right versus left deceased and living donor kidneys. Am J Transplant 2013; 13:3048. [PMID: 24102734 DOI: 10.1111/ajt.12473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- J W Hsu
- Department of Transplantation, St. Francis Medical Center, Peoria, IL
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Redfield RR, Lou Y, Rodriguez E, Rostami S, Parsons RF, Noorchashm H, Naji A, Abt PL. Sustained reduction of alloantibody secreting plasma cells and donor specific antibody with proteasome inhibition in mice. Transpl Immunol 2013; 29:11-6. [PMID: 24103731 DOI: 10.1016/j.trim.2013.09.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 09/25/2013] [Accepted: 09/27/2013] [Indexed: 12/22/2022]
Abstract
The long-lived plasma cells, which develop after alloantigen sensitization, produce donor specific alloantibodies (DSAs) that generate a positive serum cross-match and preclude transplantation. Bortezomib, a proteasome inhibitor, is being investigated in clinical desensitization protocols, however preclinical studies in a transplant model are nonexistent. We hypothesized that sustained treatment with only a proteasome inhibitor would eliminate plasma cells and reduce DSA over time. Cardiac allografts were transplanted into murine recipients. Eight weeks after allograft rejection the proteasome inhibitor, bortezomib, was injected intravenously twice weekly for 60 days. Serum alloantibody responses were assayed using flow cross-match. Total and alloreactive plasma cell numbers were enumerated using flow cytometry and ELISPOT. All recipients of cardiac allografts rejected their graft promptly within 16 days and demonstrated alloantibody by flow cross-match. DSA was sustained in the control mice while mice treated with bortezomib had sustained elimination of DSA and a marked reduction in plasma cell population. Also, bortezomib was associated with an increased level of BLyS. Within a murine model, proteasome inhibition can eliminate alloantibody secreting plasma cells, and reduce alloantibody. Cessation of bortezomib is not associated with return of DSA.
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Affiliation(s)
- R R Redfield
- Harrison Department of Surgical Research, Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, United States.
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Wolf JH, Sulewski ME, Cassuto JR, Levine MH, Naji A, Olthoff KM, Shaked A, Abt PL. Simultaneous thoracic and abdominal transplantation: can we justify two organs for one recipient? Am J Transplant 2013; 13:1806-16. [PMID: 23718142 DOI: 10.1111/ajt.12291] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 03/19/2013] [Accepted: 04/01/2013] [Indexed: 01/25/2023]
Abstract
Simultaneous thoracic and abdominal (STA) transplantation is controversial because two organs are allocated to a single individual. We studied wait-list urgency, and whether transplantation led to successful outcomes. Candidates and recipients for heart-kidney (SHK), heart-liver (SHLi), lung-liver (SLuLi) and lung-kidney (SLuK) were identified through the United Network for Organ Sharing (UNOS) and outcomes were compared to single-organ transplantation. Since 1987, there were 1801 STA candidates and 836 recipients. Wait-list survival at 1- and 3 years for SHK (67.4%, 40.8%; N = 1420), SHLi (65.7%, 43.6%; N = 218) and SLuLi (65.7%, 41.0%; N = 122), was lower than controls (p < 0.001), whereas for SLuK (65.0%, 51.6%; N = 41) it was comparable (p = 0.34). All STA groups demonstrated similar 1- and 5 years posttransplant survival to thoracic controls. Compared to abdominal controls, 1- and 5 years posttransplant survival in SHK (85.3%, 74.0%; N = 684), SLuLi (75.5%, 59.0%; N= 42) and SLuK (66.7%, 55.6%; N = 18) was decreased (p < 0.01), but SHLi (85.9%, 74.3%; N = 92) was comparable (p = 0.81). In summary, STA candidates had greater risk of wait-list mortality compared to single-organ candidates. STA outcomes were similar to thoracic transplantation; however, outcomes were similar to abdominal transplantation for SHLi only. Although select patients benefit from STA, risk-exposure variables for decreased survival should be identified, aiming to eliminate futile transplantation.
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Affiliation(s)
- J H Wolf
- Department of Surgery, University of Pennsylvania, Philadelphia, PA, USA
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Hirsch D, Odorico J, Danobeitia JS, Alejandro R, Rickels MR, Hanson M, Radke N, Baidal D, Hullett D, Naji A, Ricordi C, Kaufman D, Fernandez L. Early metabolic markers that anticipate loss of insulin independence in type 1 diabetic islet allograft recipients. Am J Transplant 2012; 12:1275-89. [PMID: 22300172 PMCID: PMC4569145 DOI: 10.1111/j.1600-6143.2011.03947.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The objective of this study was to identify predictors of insulin independence and to establish the best clinical tools to follow patients after pancreatic islet transplantation (PIT). Sequential metabolic responses to intravenous (I.V.) glucose (I.V. glucose tolerance test [IVGTT]), arginine and glucose-potentiated arginine (glucose-potentiated arginine-induced insulin secretion [GPAIS]) were obtained from 30 patients. We determined the correlation between transplanted islet mass and islet engraftment and tested the ability of each assay to predict return to exogenous insulin therapy. We found transplanted islet mass within an average of 16 709 islet equivalents per kg body weight (IEQ/kg BW; range between 6602 and 29 614 IEQ/kg BW) to be a poor predictor of insulin independence at 1 year, having a poor correlation between transplanted islet mass and islet engraftment. Acute insulin response to IVGTT (AIR(GLU) ) and GPAIS (AIR(max) ) were the most accurate methods to determine suboptimal islet mass engraftment. AIR(GLU) performed 3 months after transplant also proved to be a robust early metabolic marker to predict return to insulin therapy and its value was positively correlated with duration of insulin independence. In conclusion, AIR(GLU) is an early metabolic assay capable of anticipating loss of insulin independence at 1 year in T1D patients undergoing PIT and constitutes a valuable, simple and reliable method to follow patients after transplant.
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Affiliation(s)
- D. Hirsch
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI
| | - J. Odorico
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI
| | - J. S. Danobeitia
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI
| | - R. Alejandro
- Department of Medicine, Division of Endocrinology, University of Miami School of Medicine, Miami, FL
| | - M. R. Rickels
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - M. Hanson
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI
| | - N. Radke
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI
| | - D. Baidal
- Department of Medicine, Division of Endocrinology, University of Miami School of Medicine, Miami, FL
| | - D. Hullett
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI
| | - A. Naji
- Department of Surgery, Division of Transplantation, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - C. Ricordi
- Department of Surgery, Microbiology and Immunology, University of Miami, Miami, FL
| | - D. Kaufman
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI
| | - L. Fernandez
- Department of Surgery, Division of Transplantation, University of Wisconsin, Madison, WI,Corresponding author: Luis A. Fernandez,
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Naji A, Menier C, Maki G, Carosella ED, Rouas-Freiss N. Neoplastic B-cell growth is impaired by HLA-G/ILT2 interaction. Leukemia 2012; 26:1889-92. [DOI: 10.1038/leu.2012.62] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Wolf J, Cassuto J, Mu Y, Levine M, Naji A, Olthoff K, Shaked A, Abt P. National Outcomes for Simultaneous Thoracic and Abdominal Transplantation. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Alhuri Y, Naji A, Ouazar D, Taik A. Numerical simulation of Saint-Venant equations with turbulence using radial basis functions: application to Lake Bouregreg. IJCAT 2012. [DOI: 10.1504/ijcat.2012.046043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Neek-Amal M, Abedpour N, Rasuli SN, Naji A, Ejtehadi MR. Diffusive motion of C60 on a graphene sheet. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 82:051605. [PMID: 21230486 DOI: 10.1103/physreve.82.051605] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2009] [Revised: 08/11/2010] [Indexed: 05/30/2023]
Abstract
The motion of a C60 molecule over a graphene sheet at finite temperature is investigated both theoretically and computationally. We show that a graphene sheet generates a van der Waals laterally periodic potential, which directly influences the motion of external objects in its proximity. The translational motion of a C60 molecule near a graphene sheet is found to be diffusive in the lateral directions, while in the perpendicular direction, the motion may be described as diffusion in an effective harmonic potential which is determined from the distribution function of the position of the C60 molecule. We also examine the rotational diffusion of C60 and show that its motion over the graphene sheet is not a rolling motion.
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Affiliation(s)
- M Neek-Amal
- Department of Physics, Shahid Rajaee Teacher Training University, Lavizan, PO Box 16785-136, Tehran, Iran.
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Cassuto JR, Reese PP, Sonnad S, Bloom RD, Levine MH, Naji A, Abt P, Naji A, Abt P. Wait list death and survival benefit of kidney transplantation among nonrenal transplant recipients. Am J Transplant 2010; 10:2502-11. [PMID: 20977641 PMCID: PMC2966021 DOI: 10.1111/j.1600-6143.2010.03292.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The disparity between the number of patients waiting for kidney transplantation and the limited supply of kidney allografts has renewed interest in the benefit from kidney transplantation experienced by different groups. This study evaluated kidney transplant survival benefit in prior nonrenal transplant recipients (kidney after liver, KALi; lung, KALu; heart, KAH) compared to primary isolated (KA1) or repeat isolated kidney (KA2) transplant. Multivariable Cox regression models were fit using UNOS data for patients wait listed and transplanted from 1995 to 2008. Compared to KA1, the risk of death on the wait list was lower for KA2 (p < 0.001;HR = 0.84;CI = 0.81-0.88), but substantially higher for KALu (p < 0.001; HR = 3.80;CI = 3.08-4.69), KAH (p < 0.001; HR = 1.92; CI = 1.66-2.22), and KALi (p < 0.001; HR = 2.69; CI = 2.46-2.95). Following kidney transplant, patient survival was greatest for KA1, similar among KA2, KALi, KAH, and inferior for KALu. Compared to the entire wait list, renal transplantation was associated with a survival benefit among all groups except KALu (p = 0.017; HR = 1.61; CI = 1.09-2.38), where posttransplant survival was inferior to the wait list population. Recipients of KA1 kidney transplantation have the greatest posttransplant survival and compared to the overall kidney wait list, the greatest survival benefit.
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Affiliation(s)
- James R. Cassuto
- Department of Surgery, Division of Transplantation, University of Pennsylvania, Philadelphia, PA
| | - Peter P. Reese
- Department of Medicine, Renal Division, University of Pennsylvania, Philadelphia, PA.,Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA.,Leonard Davis Institute, University of Pennsylvania, Philadelphia, PA
| | - Seema Sonnad
- Department of Surgery, Division of Transplantation, University of Pennsylvania, Philadelphia, PA.,Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA.,Leonard Davis Institute, University of Pennsylvania, Philadelphia, PA
| | - Roy D. Bloom
- Department of Medicine, Renal Division, University of Pennsylvania, Philadelphia, PA
| | - Matthew H. Levine
- Department of Surgery, Division of Transplantation, University of Pennsylvania, Philadelphia, PA
| | - Ali Naji
- Department of Surgery, Division of Transplantation, University of Pennsylvania, Philadelphia, PA
| | - Peter Abt
- Department of Surgery, Division of Transplantation, University of Pennsylvania, Philadelphia, PA.,To whom correspondence should be addressed. Division of Transplant Surgery, 1 Founders, Hospital of the University of Pennsylvania, 3400 Spruce St., Philadelphia, PA 19104, Phone: 215 -662-2094, Fax: 215-615-4900,
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Abstract
The aim of the study was to determine whether reactive hypoglycaemia in pancreas transplant recipients that followed administration of glucagon-like peptide-1 (GLP-1) was associated with excessive insulin, insufficient glucagon, or both. Methodology involved six portally drained pancreas recipients who received GLP-1 (1.5 pmol/kg/min) or placebo infusion on randomized occasions during glucose-potentiated arginine testing. The second subject developed symptomatic hypoglycaemia [plasma glucose (PG) 42 mg/dl] 1 h after GLP-1 administration; subsequent subjects received intravenous glucose following GLP-1, but not placebo, infusion for PG levels <65 mg/dl. Following GLP-1 vs. placebo infusion, PG was lower (58 +/- 4 vs. 76 +/- 5 mg/dl; p < 0.05) despite administration of intravenous glucose. During hypoglycaemia, insulin levels and the insulin-to-glucagon ratio were greater after GLP-1 vs. placebo infusion (p < 0.05), while glucagon did not vary. It can be concluded from the study that GLP-1 can induce reactive hypoglycaemia in pancreas transplant recipients through excessive insulin secretion associated with an increased insulin-to-glucagon ratio.
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Parsons R, Vivek K, Rostami S, Naji A. Plasma Cells and Circulating Donor Specific Alloantibodies Markedly Increase after Rejection of Murine Cardiac and Skin Transplantation. J Surg Res 2010. [DOI: 10.1016/j.jss.2009.11.479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Sharif-Kashani B, Ahmadi ZH, Bikdeli B, Tabarsi P, Dorudinia A, Shahabi P, Raeissi S, Shadafza B, Estahbanati G, Naji A, Saliminejad L, Bakhshayesh-Karam M, Karimi S, Khodadad K, Masjedi MR, Gavazzi A. Bilateral diffuse pulmonary infiltration in a heart transplant recipient. Transpl Infect Dis 2009; 12:258-60. [PMID: 20015115 DOI: 10.1111/j.1399-3062.2009.00483.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pulmonary complications are not infrequent after heart transplantation. Kaposi sarcoma is a vascular tumor that can involve the skin as well as visceral organs. We describe a case of visceral and cutaneous Kaposi sarcoma that presented with diffuse bilateral pulmonary infiltration and breathlessness 6 month after heart transplantation. Following modulation of the immunosuppressive regimen and addition of chemotherapy, the patient had an excellent response and has had an uneventful 1-year follow-up.
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Affiliation(s)
- B Sharif-Kashani
- Cardiovascular Department, Masih Daneshvari Hospital, Shahid Beheshti University MC, Tehran, Iran
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25
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Kanduč M, Naji A, Jho YS, Pincus PA, Podgornik R. The role of multipoles in counterion-mediated interactions between charged surfaces: strong and weak coupling. J Phys Condens Matter 2009; 21:424103. [PMID: 21715838 DOI: 10.1088/0953-8984/21/42/424103] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present general arguments for the importance, or lack thereof, of structure in the charge distribution of counterions for counterion-mediated interactions between bounding symmetrically charged surfaces. We show that on the mean field or weak coupling level, the charge quadrupole contributes the lowest order modification to the contact value theorem and thus to the intersurface electrostatic interactions. The image effects are non-existent on the mean field level even with multipoles. On the strong coupling level the quadrupoles and higher order multipoles contribute additional terms to the interaction free energy only in the presence of dielectric inhomogeneities. Without them, the monopole is the only multipole that contributes to the strong coupling electrostatics. We explore the consequences of these statements in all their generality.
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Affiliation(s)
- M Kanduč
- Department of Theoretical Physics, J Stefan Institute, SI-1000 Ljubljana, Slovenia
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26
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Semple S, Naji A, Haw S, Ayres JG. Care-home workers' exposure to SHS: a short summary of findings. Occup Environ Med 2009; 66:639-640. [PMID: 19690157 DOI: 10.1136/oem.2009.045864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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27
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Kissler HJ, Niland JC, Olack B, Ricordi C, Hering BJ, Naji A, Kandeel F, Oberholzer J, Fernandez L, Contreras J, Stiller T, Sowinski J, Kaufman DB. Validation of methodologies for quantifying isolated human islets: an Islet Cell Resources study. Clin Transplant 2009; 24:236-42. [PMID: 19719726 DOI: 10.1111/j.1399-0012.2009.01052.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Quantification of islet mass is a crucial criterion for defining the quality of the islet product ensuring a potent islet transplant when used as a therapeutic intervention for select patients with type I diabetes. METHODS This multi-center study involved all eight member institutions of the National Institutes of Health-supported Islet Cell Resources Consortium. The study was designed to validate the standard counting procedure for quantifying isolated, dithizone-stained human islets as a reliable methodology by ascertaining the accuracy, repeatability (intra-observer variability), and intermediate precision (inter-observer variability). The secondary aim of the study was to evaluate a new software-assisted digital image analysis method as a supplement for islet quantification. RESULTS The study demonstrated the accuracy, repeatability and intermediate precision of the standard counting procedure for isolated human islets. This study also demonstrated that software-assisted digital image analysis as a supplemental method for islet quantification was more accurate and consistent than the standard manual counting method. CONCLUSIONS Standard counting procedures for enumerating isolated stained human islets is a valid methodology, but computer-assisted digital image analysis assessment of islet mass has the added benefit of providing a permanent record of the isolated islet product being evaluated that improves quality assurance operations of current good manufacturing practice.
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Affiliation(s)
- H J Kissler
- Department of Surgery, Northwestern University, Chicago, IL 60611, USA
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28
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Abdelkhirane C, Naji A, Adnan K. Abstract: 591 HOW TO IMPROVE THE MANAGEMENT OF PRE-HOSPITAL AMI PATIENTS IN NORTH AFRICA. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70346-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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29
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Abdelkhirane C, Adnan K, Naji A. Abstract: P326 THE PREVALENCE OF CAROTID ARTERY STENOSIS IN CORONARY DISEASE POPULATION IN NORTH AFRICA. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70621-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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30
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Ayres JG, Semple S, MacCalman L, Dempsey S, Hilton S, Hurley JF, Miller BG, Naji A, Petticrew M. Bar workers' health and environmental tobacco smoke exposure (BHETSE): symptomatic improvement in bar staff following smoke-free legislation in Scotland. Occup Environ Med 2009; 66:339-46. [PMID: 19208693 DOI: 10.1136/oem.2008.040311] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To examine changes in the health of bar workers after smoke-free legislation was introduced. DESIGN Longitudinal study following bar workers from before legislation introduction, at 2 months after introduction and at 1 year to control for seasonal differences. SETTING Bars across a range of socio-economic settings in Scotland. PARTICIPANTS 371 bar workers recruited from 72 bars. INTERVENTION Introduction of smoke-free legislation prohibiting smoking in enclosed public places, including bars. MAIN OUTCOMES MEASURES Change in prevalence of self-reported respiratory and sensory symptoms. RESULTS Of the 191 (51%) workers seen at 1-year follow-up, the percentage reporting any respiratory symptom fell from 69% to 57% (p = 0.02) and for sensory symptoms from 75% to 64% (p = 0.02) following reductions in exposure, effects being greater at 2 months, probably partly due to seasonal effects. Excluding respondents who reported having a cold at either baseline or 1 year, the reduction in respiratory symptoms was similar although greater for "any" sensory symptom (69% falling to 54%, p = 0.011). For non-smokers (n = 57) the reductions in reported symptoms were significant for phlegm production (32% to 14%, p = 0.011) and red/irritated eyes (44% to 18%, p = 0.001). Wheeze (48% to 31%, p = 0.006) and breathlessness (42% to 29%, p = 0.038) improved significantly in smokers. There was no relationship between change in salivary cotinine levels and change in symptoms. CONCLUSIONS Bar workers in Scotland reported significantly fewer respiratory and sensory symptoms 1 year after their working environment became smoke free. As these improvements, controlled for seasonal variations, were seen in both non-smokers and smokers, smoke-free working environments may have potentially important benefits even for smokers.
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Affiliation(s)
- J G Ayres
- Department of Environmental and Occupational Medicine, Liberty Safe Work Research Centre, Aberdeen, UK.
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31
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Kanduc M, Trulsson M, Naji A, Burak Y, Forsman J, Podgornik R. Weak- and strong-coupling electrostatic interactions between asymmetrically charged planar surfaces. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 78:061105. [PMID: 19256800 DOI: 10.1103/physreve.78.061105] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Indexed: 05/27/2023]
Abstract
We compare weak- and strong-coupling theory of counterion-mediated electrostatic interactions between two asymmetrically charged plates with extensive Monte Carlo simulations. Analytical results in both weak- and strong-coupling limits compare excellently with simulations in their respective regimes of validity. The system shows a surprisingly rich structure in terms of interactions between the surfaces as well as fundamental qualitative differences in behavior in the weak- and the strong-coupling limits.
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Affiliation(s)
- M Kanduc
- Department of Theoretical Physics, J. Stefan Institute, SI-1000 Ljubljana, Slovenia
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32
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Gannoune A, Naji A, Eladioui K, Benjelloun A. [Primary palpebral tuberculosis]. ACTA ACUST UNITED AC 2008; 110:42-4. [PMID: 19012939 DOI: 10.1016/j.stomax.2008.09.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2008] [Revised: 09/09/2008] [Accepted: 09/24/2008] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Isolated-eyelid tuberculosis is exceptional. Its clinical polymorphism explains the delayed diagnosis. OBSERVATION A 36-year-old male nurse, with no specific history, presented with a lower-eyelid nodule. The treatment was not effective and the lesion-exeresis biopsy proved the diagnosis of tuberculosis. Follow-up did not reveal any other tuberculosis focus and the patient's evolution was good under antibacilli treatment. DISCUSSION Eyelid tuberculosis is exceptional. Unlike in our case, it is usually secondary to pulmonary tuberculosis. The eyelid contamination may be hematogenic or secondary to trauma.
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Affiliation(s)
- A Gannoune
- Service de Stomatologie et de Chirurgie Maxillofaciale, Hôpital 20-Août, 5, Rue Lahcen Laarjoun, Casablanca, Morocco.
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33
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Jho YS, Kanduc M, Naji A, Podgornik R, Kim MW, Pincus PA. Strong-coupling electrostatics in the presence of dielectric inhomogeneities. Phys Rev Lett 2008; 101:188101. [PMID: 18999867 DOI: 10.1103/physrevlett.101.188101] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2008] [Indexed: 05/27/2023]
Abstract
We study the strong-coupling (SC) interaction between two like-charged membranes of finite thickness embedded in a medium of higher dielectric constant. A generalized SC theory is applied along with extensive Monte Carlo simulations to study the image charge effects induced by multiple dielectric discontinuities in this system. These effects lead to strong counterion crowding in the central region of the intersurface space upon increasing the solvent-membrane dielectric mismatch and change the membrane interactions from attractive to repulsive at small separations. These features agree quantitatively with the SC theory at elevated couplings or dielectric mismatch where the correlation hole around counterions is larger than the thickness of the central counterion layer.
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Affiliation(s)
- Y S Jho
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA
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34
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Jawad AM, Jaffer HJ, Alnaib A, Naji A. Antimicrobial Activity of Sesquiterpene Lactone and Alkaloid Fractions from Iraqi-Plants. ACTA ACUST UNITED AC 2008. [DOI: 10.3109/13880208809053917] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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35
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Suszynski TM, Wildey GM, Falde EJ, Cline GW, Maynard KS, Ko N, Sotiris J, Naji A, Hering BJ, Papas KK. The ATP/DNA ratio is a better indicator of islet cell viability than the ADP/ATP ratio. Transplant Proc 2008; 40:346-50. [PMID: 18374063 DOI: 10.1016/j.transproceed.2008.01.061] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Real-time, accurate assessment of islet viability is critical for avoiding transplantation of nontherapeutic preparations. Measurements of the intracellular ADP/ATP ratio have been recently proposed as useful prospective estimates of islet cell viability and potency. However, dead cells may be rapidly depleted of both ATP and ADP, which would render the ratio incapable of accounting for dead cells. Since the DNA of dead cells is expected to remain stable over prolonged periods of time (days), we hypothesized that use of the ATP/DNA ratio would take into account dead cells and may be a better indicator of islet cell viability than the ADP/ATP ratio. We tested this hypothesis using mixtures of healthy and lethally heat-treated (HT) rat insulinoma cells and human islets. Measurements of ATP/DNA and ADP/ATP from the known mixtures of healthy and HT cells and islets were used to evaluate how well these parameters correlated with viability. The results indicated that ATP and ADP were rapidly (within 1 hour) depleted in HT cells. The fraction of HT cells in a mixture correlated linearly with the ATP/DNA ratio, whereas the ADP/ADP ratio was highly scattered, remaining effectively unchanged. Despite similar limitations in both ADP/ADP and ATP/DNA ratios, in that ATP levels may fluctuate significantly and reversibly with metabolic stress, the results indicated that ATP/DNA was a better measure of islet viability than the ADP/ATP ratio.
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Affiliation(s)
- T M Suszynski
- Diabetes Institute for Immunology and Transplantation, Department of Surgery, University of Minnesota, Minneapolis, Minnesota 55455, USA
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36
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Maki G, Hayes GM, Naji A, Tyler T, Carosella ED, Rouas-Freiss N, Gregory SA. NK resistance of tumor cells from multiple myeloma and chronic lymphocytic leukemia patients: implication of HLA-G. Leukemia 2008; 22:998-1006. [PMID: 18288133 DOI: 10.1038/leu.2008.15] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Exploiting the antitumor effect of natural killer (NK) cells has regained interest in light of data from preclinical and clinical work on the potential of alloreactive NK cells. Multiple myeloma (MM) and chronic lymphocytic leukemia (CLL) represent the two most prevalent adult hematological malignancies in the western hemisphere. To evaluate the role of NK cells in the immune surveillance and their therapeutic potential for CLL and MM, tumor cell susceptibility to NK-mediated killing was investigated. Results show relative resistance of tumor cells from CLL as well as MM (73 and 70% of the patients, respectively) to NK-mediated killing. To gain insight into molecular mechanisms of this resistance, the expression of the tolerogenic HLA-G molecule in CLL and MM and its relevance to susceptibility to NK-mediated killing were investigated. HLA-G transcript was found in tumor cells from 89% (n=19) of CLL and 100% (n=9) of MM patients examined. HLA-G1 surface expression was observed in CLL and was very low or undetectable in MM. Notably, blocking of HLA-G1 with specific antibody on CLL samples increased their susceptibility to NK-mediated killing, demonstrating that HLA-G participates in protecting CLL cells from NK-mediated killing and may thus contribute to their immune escape in vivo.
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Affiliation(s)
- G Maki
- Section of Hematology and Bone Marrow Transplantation, Division of Hematology/Oncology, Rush University Medical Center, Chicago, IL, USA.
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Goral S, Prak EL, Kearns J, Bloom RD, Pierce E, Doyle A, Grossman R, Naji A, Kamoun M. Preformed donor-directed anti-HLA-DP antibodies may be an impediment to successful kidney transplantation. Nephrol Dial Transplant 2007; 23:390-2. [DOI: 10.1093/ndt/gfm703] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Naji A, Willmann P, Billaud D. Electrointercalation of Lithium into Graphite : Effects of the Electrolyte Composition and the Graphite Surface Treatment. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259808045364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Naji
- a LCSM-Université Henri Poincaré Nancy I , BP 239, 54506 , VANDOEUVRE les NANCY CEDEX , FRANCE
| | - P. Willmann
- b CNES , rue E. Belin, 31055 , TOULOUSE CEDEX , FRANCE
| | - D. Billaud
- a LCSM-Université Henri Poincaré Nancy I , BP 239, 54506 , VANDOEUVRE les NANCY CEDEX , FRANCE
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Dubois M, Naji A, Billaud D. Electrochemical Insertion of Lithium into Carbonaceous Materials Derived from Pyrolyzed Polyparaphehylene : Effects of the Pyrolysis Time. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008025468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. Dubois
- a Laboratoire de Chimie du Solide Minéral-UMR 7555 , Université Henri Poincaré Nancy 1 , BP 239, 54506, Vandoeuvre-lès-Nancy , France
| | - A. Naji
- a Laboratoire de Chimie du Solide Minéral-UMR 7555 , Université Henri Poincaré Nancy 1 , BP 239, 54506, Vandoeuvre-lès-Nancy , France
| | - D. Billaud
- a Laboratoire de Chimie du Solide Minéral-UMR 7555 , Université Henri Poincaré Nancy 1 , BP 239, 54506, Vandoeuvre-lès-Nancy , France
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40
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Bhattacharya S, Porter M, Harrild K, Naji A, Mollison J, van Teijlingen E, Campbell DM, Hall MH, Templeton A. Absence of conception after caesarean section: voluntary or involuntary? BJOG 2006; 113:268-75. [PMID: 16487197 DOI: 10.1111/j.1471-0528.2006.00853.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Women who deliver by caesarean section have been shown to be less likely to have a subsequent pregnancy. It is not clear whether this is due to a direct effect of the procedure on future fertility or due to deliberate avoidance of a future pregnancy. OBJECTIVE To investigate whether absence of conception following caesarean section is voluntary or involuntary. DESIGN Follow up of a population-based retrospective cohort. SETTING Grampian region, Scotland. POPULATION Women who had no further viable pregnancies within 5 years of an initial delivery. METHODS Cases included women who delivered their first child by caesarean section between 1980 and 1995 but had no further viable pregnancies by December 2000. Controls included women who delivered their first child during the same period, by means of either spontaneous vaginal delivery (SVD) or instrumental vaginal delivery (IVD), and who had no further viable pregnancies by December 2000. Eligible women were identified from the Aberdeen Maternity and Neonatal Databank (AMND) and sent postal questionnaires to determine the extent to which not conceiving after first delivery was voluntary and the reasons for avoiding further pregnancies. Characteristics of the different mode of delivery groups were compared using univariate techniques. MAIN OUTCOME MEASURES Extent to which absence of conception following an initial delivery by caesarean section is voluntary. RESULTS Questionnaires were returned by 3204 (60%) of 5300 women identified from the AMND. Of these, 1675 women had not conceived at all during the follow-up period (median duration = 13 years). Absence of conception was voluntary in 488 (69%; 95% CI 66-73%) women following caesarean section, 340 (71%; 95% CI 67-76%) following SVD and 354 (72%; 95% CI 68-76%) following IVD. Few women considered seeking fertility treatment (caesarean section = 72 [10%], SVD = 50 [11%], IVD = 39 [8%]). Of the women who decided to delay or avoid a further pregnancy, fewer women who delivered by SVD reported that the birth experience influenced their decision (caesarean section = 163 [32%], SVD = 67 [18%], IVD = 136 [35%]; P < 0.001). CONCLUSIONS Irrespective of mode of delivery, not conceiving following the birth of the first child is mainly voluntary. The experience of the previous birth is one of several factors affecting women's decisions to avoid a subsequent pregnancy.
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Affiliation(s)
- S Bhattacharya
- Department of Obstetrics and Gynaecology, University of Aberdeen, Foresterhill, Aberdeen, UK.
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41
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Noorchashm H, Liu C, Reed A, Rostami S, Barker C, Naji A. The role of B lymphocytes in acute allograft rejection. J Surg Res 2006. [DOI: 10.1016/j.jss.2005.11.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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42
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Naji A, Deschaseaux F, Racadot E, Ferrand C, Justrabo E, Guignier F, Mousson C, Rifle G. Induction of tissue factor expression on human umbilical vein endothelial cells by cell-specific HLA class I antibody: preliminary data. Transplant Proc 2006; 37:2892-3. [PMID: 16182846 DOI: 10.1016/j.transproceed.2005.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Donor-specific antibodies may play an important role in the development of chronic allograft rejection process. However, the mechanisms leading to intimal vascular proliferation and fibrosis remain poorly understood. The aim of this study was to examine whether donor-specific HLA antibodies induce overexpression of tissue factor (TF) by endothelial cells. HLA typed human umbilical vein endothelial cells (HUVEC) were incubated for 1 to 12 hours with LPS (10 microg/mL), and increasing concentrations (1 to 500 microg/mL) of anti-HLA A1 antibody specific for an antigen expressed by HUVEC and of an anti-HLA A2 antibody for which A2 was not expressed by the HUVEC. Expression of TF mRNA transcripts was quantified using real time Q-RT PCR and TF activity was tested in cell lysates of cultured HUVEC using a chromogenic TF activity assay. HUVEC-specific anti-HLA A1 antibody at low concentrations (10 microg/mL) induced both a significant increase of TF mRNA transcripts after 1 hour of incubation and TF activity after 3 hours incubation compared to incubation with medium alone or with the nonspecific anti-HLA A2 antibody (n = 4 for all experiments, P < .05). These data show for the first time that specific anti-HLA antibody can induce overexpression of TF on endothelial cells. TF, a transmembrane glycoprotein involved not only in the onset of the coagulation cascade, but also in cell proliferation and anti-apoptotic processes, may play a role in the development of alloantibody-induced chronic rejection.
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Affiliation(s)
- A Naji
- UPRES EA563, Faculté de Médecine, Dijon, France
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43
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Canter RJ, Abt PL, Litzky LA, Frank A, Abt AB, Sellers MT, Markmann JF, Olthoff KM, Naji A, Shaked A. Successful liver, kidney, and pancreas transplantation from a donor with cerebral emboli from a left atrial myxoma. Transplant Proc 2006; 37:4334-6. [PMID: 16387113 DOI: 10.1016/j.transproceed.2005.10.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2005] [Indexed: 11/21/2022]
Abstract
Although transmission and engraftment of donor-derived malignancies is rare in recipients of solid organ transplants, it is associated with unfavorable allograft and patient survival. Therefore, a recent history of malignancy is considered a contraindication to organ donation. Although atrial myxomas are benign cardiac tumors of stromal origin, they can lead to systemic embolization with ectopic myxoma formation. We report successful liver, kidney, and pancreas transplantation into 3 recipients from a donor with cerebral emboli from a left atrial myxoma. Eighteen months after transplantation, all 3 patients enjoy good allograft function and are free of donor-derived atrial myxoma. Although the duration of follow-up in this report is limited, we suggest that the presence of atrial myxoma should not be viewed as an absolute contraindication to organ recovery, particularly in view of the shortage of organ donors and the attendant morbidity and mortality for patients on waiting lists.
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Affiliation(s)
- R J Canter
- Department of Surgery, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania 19104, USA
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44
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Lobo PI, Spencer C, Simmons WD, Hagspiel KD, Angle JF, Deng S, Markmann J, Naji A, Kirk SE, Pruett T, Brayman KL. Development of anti-human leukocyte antigen class 1 antibodies following allogeneic islet cell transplantation. Transplant Proc 2005; 37:3438-40. [PMID: 16298621 DOI: 10.1016/j.transproceed.2005.09.065] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Currently there is minimal concern that islet allograft failure could result from the development of anti-human leukocyte antigen (HLA) antibodies reactive to the allograft. We report here a case of islet allograft failure where the recipient developed immunoglobulin G anti-HLA class I antibodies reactive to HLA antigens present in two of the three islet cell donors. The patient had no detectable anti-HLA antibodies prior to the transplant but these antibodies were detected approximately 4 months posttransplant. Of concern, these antibodies developed despite induction with anti-IL2R antibodies (Zenapex) prior to intraportal islet cell infusion, low-dose tacrolimus (12-hour troughs 3 to 5 ng/mL) and rapammune (target troughs 12 to 15 ng/mL). The patient was not presensitized with blood products or a previous allograft. Her husband, however, shared antigens present in one of the islet donors and the recipient could have been presensitized to her husband during her two pregnancies. This case clearly demonstrates that islet allografts can lead to development of anti-HLA antibodies, which can cause islet allograft failure, as is the case with solid organ transplants, and hence emphasizes the need to monitor for such antibodies pre- and posttransplant. Additionally it appears that currently recommended immunosuppression may not be sufficient to inhibit a humoral response to both alloantigens and autoantigens.
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Affiliation(s)
- P I Lobo
- Department of Internal Medicine and Surgery, University of Virginia Health System, Charlottesville, VA 22908, USA.
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Schmitz A, Shiue CY, Feng Q, Shiue G, Deng S, Pourdehnad M, Schirrmacher R, Vatamaniuk M, Doliba N, Matschinsky F, Wolf B, Rösch F, Naji A, Alavi A. Erratum to “Synthesis and evaluation of fluorine-18 labeled glyburide analogs as β-cell imaging agents” [Nucl. Med. Biol. 2004;31: 483–491]. Nucl Med Biol 2005. [DOI: 10.1016/j.nucmedbio.2004.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Schmitz A, Shiue CY, Feng Q, Shiue GG, Deng S, Pourdehnad MT, Schirrmacher R, Vatamaniuk M, Doliba N, Matschinsky F, Wolf B, Rösch F, Naji A, Alavi AA. Synthesis and evaluation of fluorine-18 labeled glyburide analogs as beta-cell imaging agents. Nucl Med Biol 2004; 31:483-91. [PMID: 15093819 DOI: 10.1016/j.nucmedbio.2003.12.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2003] [Revised: 11/28/2003] [Accepted: 12/03/2003] [Indexed: 01/20/2023]
Abstract
Glyburide is a prescribed hypoglycemic drug for the treatment of type 2 diabetic patients. We have synthesized two of its analogs, namely N-[4-[beta-(2-(2'-fluoroethoxy)-5-chlorobenzenecarboxamido)ethyl]benzenesulfonyl]-N'-cyclohexylurea (2-fluoroethoxyglyburide, 8b) and N-[4-[beta-(2-(2'-fluoroethoxy)-5-iodobenzenecarboxamido)ethyl]benzenesulfonyl]-N'-cyclohexylurea (2-fluoroethoxy-5-deschloro-5-iodoglyburide, 8a), and their fluorine-18 labeled analogs as beta-cell imaging agents. Both F-18 labeled compound 8a and compound 8b were synthesized by alkylation of the corresponding multistep synthesized hydroxy precursor 4a and 4b with 2-[(18)F]fluoroethyl tosylate in DMSO at 120 degrees C for 20 minutes followed by HPLC purification in an overall radiochemical yield of 5-10% with a synthesis time of 100 minutes from EOB. The octanol/water partition coefficients of compounds 8a and 8b were 141.21 +/- 27.77 (n = 8) and 124.33 +/- 21.61 (n = 8), respectively. Insulin secretion experiments of compounds 8a and 8b on rat islets showed that both compounds have a similar stimulating effect on insulin secretion as that of glyburide. In vitro binding studies showed that approximately 2% of compounds 8a and 8b bound to beta TC3 and Min6 cells and that the binding was saturable. Preliminary biodistribution studies in mice showed that the uptake of both compounds 8a and 8b in liver and small intestine were high, whereas the uptake in other organs studied including pancreas were low. Additionally, the uptake of compound 8b in vivo was nonsaturable. These results tend to suggest that compounds 8a and 8b may not be the ideal beta-cell imaging agents.
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Affiliation(s)
- A Schmitz
- Department of Radiology, University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, USA
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Sinapi F, Naji A, Delhalle J, Mekhalif Z. Assessment by XPS and electrochemical techniques of two molecular organosilane films prepared on stainless-steel surfaces. SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.1926] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Naji A, Cretin M, Persin M, Sarrazin J. Preparation of membranes by electropolymerization of pyrrole functionalized by a ferrocene group. J Appl Polym Sci 2004. [DOI: 10.1002/app.13622] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Abstract
Like-charged macroions attract each other as a result of strong electrostatic correlations in the presence of multivalent counterions or at low temperatures. We investigate the effective electrostatic interaction between i) two like-charged rods and ii) two like-charged spheres using the recently introduced strong-coupling theory, which becomes asymptotically exact in the limit of large coupling parameter (i.e. for large counterion valency, low temperature, or high surface charge density on macroions). In contrast to previous applications of the strong-coupling theory, we deal with curved surfaces and an additional parameter, referred to as Manning parameter, is introduced, which measures the ratio between the radius of curvature of macroions to the Gouy-Chapman length. This parameter, together with the size of the confining box enclosing the two macroions and their neutralizing counterions, controls the counterion-condensation process that directly affects the effective interactions. For sufficiently large Manning parameters (weakly-curved surfaces), we find a strong long-ranged attraction between two macroions that form a closely-packed bound state with small surface-to-surface separation of the order of the counterion diameter in agreement with recent simulations results. For small Manning parameters (highly-curved surfaces), on the other hand, the equilibrium separation increases and the macroions unbind from each other as the confinement volume increases to infinity. This occurs via a continuous universal unbinding transition for two charged rods at a threshold Manning parameter of Epsilon c = 2/3, while the transition is strongly discontinuous for spheres because of a pronounced potential barrier at intermediate distances. Unlike the cylindrical case, the attractive forces between spheres disappear slowly for increasing confinement volume due to the complete de-condensation of counterions. Scaling arguments suggest that for moderate values of coupling parameter, strong-coupling predictions remain valid for sufficiently small surface-to-surface separations.
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Affiliation(s)
- A Naji
- Sektion Physik, Ludwig-Maximilians-Universität, Theresienstr. 37, 80333, München, Germany.
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Abstract
We investigate polyelectrolyte brushes in the osmotic regime using both theoretical analysis and molecular dynamics simulation techniques. In the simulations at moderate Bjerrum length, we observe that the brush height varies weakly with grafting density, in contrast to the accepted scaling law, which predicts a brush thickness independent of the grafting density. We show that such behavior can be explained by considering lateral electrostatic effects (within the non-linear Poisson-Boltzmann theory) combined with the coupling between lateral and longitudinal degrees of freedom due to the conserved polymer volume (which are neglected in scaling arguments). We also take the non-linear elasticity of polyelectrolyte chains into consideration, which makes significant effects as chains are almost fully stretched in the osmotic regime. It is shown that all these factors lead to a non-monotonic behavior for the brush height as a function of the grafting density. At large grafting densities, the brush height increases with increasing the grafting density due to the volume constraint. At small grafting densities, we obtain a re-stretching of the chains for decreasing grafting density, which is caused by lateral electrostatic contributions and is controlled by the counterion-condensation process around polyelectrolyte chains. These results are obtained assuming all counterions to be trapped within the brush, which is valid for sufficiently long chains of large charge fraction.
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Affiliation(s)
- A Naji
- Sektion Physik, Ludwig-Maximilians-Universität, Theresienstr. 37, D-80333 , München, Germany.
- Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg, D-14476, Golm, Germany.
| | - R R Netz
- Sektion Physik, Ludwig-Maximilians-Universität, Theresienstr. 37, D-80333 , München, Germany
- Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg, D-14476, Golm, Germany
| | - C Seidel
- Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg, D-14476, Golm, Germany
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