Association between capsule diameter, adequacy of encapsulation, and survival of microencapsulated rat islet allografts.

Abstract:

:As a consequence of its large volume, a microencapsulated islet graft can be implanted only into the peritoneal cavity. The graft volume can be reduced by using small capsules. However, reduction of the diameter of the capsules holds a certain risk, because with smaller capsules, more islets may be found to protrude from the capsules. We have developed a lectin binding assay which, after encapsulation, specifically labels islets or parts of islets that are insufficiently immunoprotected as a consequence of inadequate, and particularly incomplete, encapsulation. With this assay, we found that a reduction of the capsule diameter from 800 micrometers to 500 micrometers was associated with an increase in the percentage of inadequately encapsulated islets from 6.3+/-1.2% to 24.2+/-1.5%. The in vivo significance of this finding was investigated by performing allotransplantations with large diameter (700-800 micrometers) and small diameter (400-500 micrometers) capsules. With large-capsule islet grafts, all recipients (n=5) became normoglycemic for 7-16 weeks, whereas with small-capsule islet grafts, only one of seven recipients became normoglycemic. The in vivo significance of inadequate encapsulation was further substantiated by our finding that most large capsules were floating freely in the peritoneal cavity without any cell adhesion, whereas the vast majority of small capsules was found to be adherent to the surface of intra-abdominal organs and infiltrated by immune cell elements characteristic of both an allograft reaction and a foreign body reaction. We conclude that successful use of capsules with small diameters requires further study to determine which factors in the encapsulation procedure should be modified to reduce the number of inadequate small capsules.

journal_name

Transplantation

journal_title

Transplantation

authors

De Vos P,De Haan B,Pater J,Van Schilfgaarde R

doi

10.1097/00007890-199610150-00004

subject

Has Abstract

pub_date

1996-10-15 00:00:00

pages

893-9

issue

7

eissn

0041-1337

issn

1534-6080

journal_volume

62

pub_type

杂志文章
  • Hepatic iron in the control of iron absorption in a rat liver transplantation model.

    abstract::Rat liver transplantation was utilized to study the effect of hepatic iron on the control of iron absorption. Six iron-loaded and six normal livers were transplanted into normal or iron-loaded animals. Iron absorption was measured pretransplant and 10 days posttransplant by total-body counting (59Fe). The animals were...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198907000-00005

    authors: Adams PC,Reece AS,Powell LW,Halliday JW

    更新日期:1989-07-01 00:00:00

  • Interstitial pneumonitis and lymphocytic bronchiolitis/bronchitis as a direct result of acute lethal graft-versus-host disease duplicate the histopathology of lung allograft rejection.

    abstract::Pulmonary complications are often lethal components of acute graft-vs.-host disease (GVHD). Although interstitial pneumonitis and lymphocytic bronchitis have been implicated as elements of acute GVHD, previous studies have not determined a correlation between the onset of these histopathologies or their contribution t...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:

    authors: Workman DL,Clancy J Jr

    更新日期:1994-07-27 00:00:00

  • The large center variation in half-lives of kidney transplants.

    abstract::Based on a log-linear model for analyzing multiple effects, center variation in the UCLA Transplant Registry is the most influential factor in early renal graft survival. Among 68 active centers accounting for 70% of all transplants between 1985 and 1989, the 1-year graft survival (adjusted for 15 covariates) varied f...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199202010-00018

    authors: Gjertson DW,Terasaki PI

    更新日期:1992-02-01 00:00:00

  • Atypical mixed lymphocyte culture. Identity between mother and child in leukemia and aplastic anemia.

    abstract::The mixed lymphocyte culture tests between one patient with acute lymphocytic leukemia and her mother and between another patient with aplastic anemia and his mother were found nonreactive, despite a one-haplotype difference for HL-A. Two crossovers in each family at the MLC locus or a specific defect in lymphocyte r...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-197501000-00008

    authors: Opelz G

    更新日期:1975-01-01 00:00:00

  • Factors influencing weight gain after renal transplantation.

    abstract::Weight gain following renal transplantation occurs frequently but has not been investigated quantitatively. A retrospective chart review of 115 adult renal transplant recipients was used to describe patterns of weight gain during the first 5 years after transplantation. Only 23 subjects (21%) were overweight before th...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199310000-00008

    authors: Johnson CP,Gallagher-Lepak S,Zhu YR,Porth C,Kelber S,Roza AM,Adams MB

    更新日期:1993-10-01 00:00:00

  • The Outcomes of Portal Vein Reconstruction With Vein Graft Interposition in Pediatric Liver Transplantation for Small Children With Biliary Atresia.

    abstract:BACKGROUND:Several technical modifications in portal vein (PV) reconstruction have shown excellent outcomes in pediatric liver transplantation (LT); however, which procedure is the best for PV reconstruction of the hypoplastic PV in pediatric LT remains unclear. METHODS:One hundred sixteen pediatric patients aged 1 or...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0000000000002793

    authors: Sakamoto S,Uchida H,Kitajima T,Shimizu S,Yoshimura S,Takeda M,Hirata Y,Fukuda A,Kasahara M

    更新日期:2020-01-01 00:00:00

  • Tacrolimus (FK506) and cyclosporine reduce the uptake and transport of particles into rabbit Peyer's patches.

    abstract::Tacrolimus (FK) and cyclosporine (Cs) are potent immunosuppressants that effectively prevent the rejection of transplanted organs including liver and small intestine. Our study examined the effects of these immunosuppressants on Peyer's patches, which play an important role in mucosal immune response through uptake an...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200204150-00006

    authors: Fujimura Y,Owen RL

    更新日期:2002-04-15 00:00:00

  • Measurement of mycophenolate mofetil effect in transplant recipients.

    abstract:BACKGROUND:Immunosuppression involves the nature of the immunosuppressive agents and individual differences in patient factors. We investigated whether the effect of mycophenolate mofetil (MMF) is measurable using an in vitro measure of immunocompetence and related its effects to cyclosporine (CsA) in vitro. METHODS:L...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200108150-00011

    authors: Ogawa N,Nagashima N,Nakamura M,Shalabi A,Maley WR,Burdick JF

    更新日期:2001-08-15 00:00:00

  • Aspergillus infection in single and double lung transplant recipients.

    abstract::To investigate the clinical manifestations of Aspergillus infections in lung transplant recipients, we reviewed the mycology and autopsy reports of all double (DLT=93) and single (SLT=48) lung transplant recipients from November 1983 to May 1993. Positive Aspergillus cultures were identified in 22% of the recipients (...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199603270-00013

    authors: Westney GE,Kesten S,De Hoyos A,Chapparro C,Winton T,Maurer JR

    更新日期:1996-03-27 00:00:00

  • Removal of anti-porcine natural antibodies from human and nonhuman primate plasma in vitro and in vivo by a Galalpha1-3Galbeta1-4betaGlc-X immunoaffinity column.

    abstract:BACKGROUND:Natural antibodies (NAbs) against a terminal alpha1-3 galactosyl (alphaGal) epitope have been identified as the major human anti-pig NAbs. METHODS AND RESULTS:We used two synthetic alphaGal trisaccharides--type 6 (alphaGal6) and type 2(alphaGal2)--linked to an inert matrix to remove NAbs from human plasma i...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199801270-00005

    authors: Xu Y,Lorf T,Sablinski T,Gianello P,Bailin M,Monroy R,Kozlowski T,Awwad M,Cooper DK,Sachs DH

    更新日期:1998-01-27 00:00:00

  • Rapid rejection of HLA-A2 transgenic skin graft due to indirect allorecognition.

    abstract:BACKGROUND:At present, it is not clear whether xenogeneic MHC molecules are recognized by T cells directly or indirectly through self-MHC-restricted presentation in a transplantation setting. METHODS:We have transplanted skin from HLA-A2 transgenic (B6.A2) to nontransgenic C57BL/6 (B6) mice and investigated the subseq...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200109270-00003

    authors: Jurcevic S,Chandler P,Sacks SH,Simpson E

    更新日期:2001-09-27 00:00:00

  • Altered threshold for the induction of graft-versus-host immunodeficiency following murine cytomegalovirus infection. Host and donor contributions.

    abstract::Acute murine cytomegalovirus (MCMV) infection enhances the ability of parental spleen cells to induce graft-vs.-host immunodeficiency (GVHID) in F1 hybrid mice when the two processes occur simultaneously in the recipient. The present study assessed GVHID as the ability of spleen cells to generate in vitro cytotoxic T ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198808000-00021

    authors: Via CS,Shanley JD,Weatherly BR,Lang P,Shearer GM

    更新日期:1988-08-01 00:00:00

  • Programmed cell death.

    abstract::Programmed cell death (PCD) is currently one of the most intensively studied areas in cell biology. Substantial evidence now exists demonstrating the integral role of PCD in many fundamental immunologic processes; therefore, understanding the mechanisms of PCD may provide advances with broad implications in immunobiol...

    journal_title:Transplantation

    pub_type: 杂志文章,评审

    doi:10.1097/00007890-199809270-00001

    authors: Woodle ES,Kulkarni S

    更新日期:1998-09-27 00:00:00

  • Prednisolone and posttransplantation hypertension in rat renal allograft recipients.

    abstract::Rat recipients of renal allografts and unilaterally nephrectomized control rats were studied to evaluate the response in blood pressure to prednisolone in diverse doses, and to determine the dosage required to achieve adequate immunosuppression without undue complication of hypertension. While a continuous infusion of...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198703000-00007

    authors: de Keijzer MH,Provoost AP,Van Aken M,Wolff ED,Molenaar JC

    更新日期:1987-03-01 00:00:00

  • Comparing Glycaemic Benefits of Active Versus Passive Lifestyle Intervention in Kidney Allograft Recipients: A Randomized Controlled Trial.

    abstract:BACKGROUND:New-onset diabetes is common after kidney transplantation, but the benefit of lifestyle intervention to improve glucose metabolism posttransplantation is unproven. METHODS:We conducted a single-center, randomized controlled trial involving 130 nondiabetic kidney transplant recipients with stable function be...

    journal_title:Transplantation

    pub_type: 杂志文章,随机对照试验

    doi:10.1097/TP.0000000000002969

    authors: Kuningas K,Driscoll J,Mair R,Smith H,Dutton M,Day E,Sharif AA

    更新日期:2020-07-01 00:00:00

  • Acute tubular necrosis after renal transplantation.

    abstract::We evaluated the influence of dialysis requiring acute tubular necrosis on patient survival, and kidney survival and function in all 182 patients who needed dialysis immediately after transplantation at the University of Minnesota Hospitals. When compared to matched control patients not requiring dialysis, there was n...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198003000-00016

    authors: Brophy D,Najarian JS,Kjellstrand CM

    更新日期:1980-03-01 00:00:00

  • Cyclosporine-associated hypertension in cardiopulmonary transplantation. The beneficial effect of nifedipine on renal function.

    abstract::In a retrospective review of fifty heart, lung, and heart-lung recipients receiving cyclosporine, forty-six (92%) were hypertensive. This hypertension was managed with either prazosin (n = 29) or nifedipine (n = 17). Renal function was assessed by creatinine clearance estimation and found to be significantly better in...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198909000-00015

    authors: Kirk AJ,Omar I,Bateman DN,Dark JH

    更新日期:1989-09-01 00:00:00

  • Effect of renal allograft dysfunction upon cyclosporine trough levels in host blood.

    abstract::Cyclosporine (CsA) dose adjustment after renal transplantation is generally based on serum, plasma, or whole-blood trough level values. In the face of increased levels, the dosage is reduced in order to prevent CsA-induced nephrotoxicity. There is a paucity of data, however, on the kinetics of CsA in association with ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198512000-00006

    authors: Arnold AN,Waltzer WC,Anaise D,Weinstein SW,Rapaport FT

    更新日期:1985-12-01 00:00:00

  • Telomerase activity in rat liver allografts.

    abstract:BACKGROUND:Telomerase activity in grafts may be involved in the alteration of cellular senescence after transplantation or its relevant immunological events. METHODS:At the age of 20 weeks, donor livers harvested from DA (RT1a) were orthotopically transplanted into PVG (RT1c) or LEW (RT1(1)) rats. Rats having undergon...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200003150-00062

    authors: Goto S,Lin YC,Lai CY,Lee CM,Pan TL,Lord R,Chiang KC,Tseng HP,Lin CL,Cheng YF,Yokoyama H,Kitano S,Chen CL

    更新日期:2000-03-15 00:00:00

  • Regulation of molecular pathways in ischemia-reperfusion injury after liver transplantation.

    abstract:BACKGROUND:Ischemia-reperfusion (I/R) injury is a multifactorial phenomenon that occurs during the transplant event and frequently compromises early graft function after liver transplantation (LT). Current comprehension of molecular mechanisms and regulation processes of I/R injury lacks clarity. MicroRNA (miRNA) regul...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0b013e3182a20398

    authors: Gehrau RC,Mas VR,Dumur CI,Ladie DE,Suh JL,Luebbert S,Maluf DG

    更新日期:2013-11-27 00:00:00

  • Early enteral supply of lactobacillus and fiber versus selective bowel decontamination: a controlled trial in liver transplant recipients.

    abstract:BACKGROUND:Early enteral nutrition with solutions containing prebiotics (fiber) and probiotics (Lactobacillus) is suggested to reduce bacterial translocation and minimize the incidence of infections after liver transplantation. METHODS:In a prospective, randomized placebo-controlled trial consisting of 95 patients, we...

    journal_title:Transplantation

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00007890-200207150-00021

    authors: Rayes N,Seehofer D,Hansen S,Boucsein K,Müller AR,Serke S,Bengmark S,Neuhaus P

    更新日期:2002-07-15 00:00:00

  • Early up-regulation of macrophages and myofibroblasts: a new marker for development of chronic renal allograft rejection.

    abstract:BACKGROUND:Increased numbers of macrophages and myofibroblasts are observed to occur in chronic renal allograft rejection (CR). The aim of this study was to examine the expression of cellular markers for the macrophage and myofibroblast in early renal transplant biopsy specimens and correlate these findings with allogr...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200006270-00028

    authors: Pilmore HL,Painter DM,Bishop GA,McCaughan GW,Eris JM

    更新日期:2000-06-27 00:00:00

  • Allogeneic sensitization is more effective than xenogeneic sensitization in eliciting Gal-mediated skin graft rejection.

    abstract::The generation of Gal knockout (KO) pigs is likely to be an important advance in xenotransplantation. However, recent reports suggesting that expression of Gal may not be completely eliminated raise the possibility of a continuing anti-Gal immune response. The authors used a Gal-mismatched skin graft model to study ce...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/01.tp.0000116420.17173.e4

    authors: Gock H,Murray-Segal L,Salvaris E,Cowan P,D'Apice AJ

    更新日期:2004-03-15 00:00:00

  • Donor-specific antibody levels and three generations of crossmatches to predict antibody-mediated rejection in kidney transplantation.

    abstract:BACKGROUND:This study evaluated the prognostic impact of pretransplant donor-specific anti-human leukocyte antigen antibodies (DSA) detected by single-antigen beads and compared the three generations of crossmatch (XM) tests in kidney transplantation. METHODS:Thirty-seven T-cell complement-dependent cytotoxicity cross...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/tp.0b013e3181e36e08

    authors: Riethmüller S,Ferrari-Lacraz S,Müller MK,Raptis DA,Hadaya K,Rüsi B,Laube G,Schneiter G,Fehr T,Villard J

    更新日期:2010-07-27 00:00:00

  • Prevention of graft-versus-host disease following small bowel transplantation with polyclonal and monoclonal antilymphocyte serum. The effect of timing and route of administration.

    abstract::Graft-versus-host disease is a potential problem following small bowel transplantation. We have previously shown that a two-day intraperitoneal course of polyclonal antilymphocyte serum completely prevents GVHD without impairing allograft function in a unidirectional rat small bowel transplant model. In the present st...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199112000-00002

    authors: Shaffer D,Ubhi CS,Simpson MA,Gottschalk R,Milford EL,Maki T,Monaco AP

    更新日期:1991-12-01 00:00:00

  • Characterization of immunoreactive trypsin as a means of differentiating graft pancreatitis and allograft rejection after porcine pancreatic transplantation.

    abstract::Graft pancreatitis and allograft rejection were both accompanied by increased serum levels of immunoreactive anionic trypsin (irAT) in a porcine pancreatic allograft transplantation model. Characterization of this immunoreactivity by gel filtration revealed different elution profiles in these conditions that can be he...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199201000-00004

    authors: Källén R,Borgström A

    更新日期:1992-01-01 00:00:00

  • Cytomegalovirus disease is not a major risk factor for ischemic heart disease after renal transplantation.

    abstract:BACKGROUND:It has been suggested that cytomegalovirus infection increases the risk of ischemic heart disease. Both cytomegalovirus and ischemic heart disease are common after renal transplantation, suggesting a possible causal association in this population. METHODS AND PATIENTS:We studied 1004 consecutive renal trans...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200110270-00011

    authors: Hernández D,Hanson E,Kasiske MK,Danielson B,Roel J,Kasiske BL

    更新日期:2001-10-27 00:00:00

  • Effect of FK506 versus cyclosporine on human natural and antibody-dependent cytotoxicity reactions in vitro.

    abstract::The effect of FK506 and cyclosporine on NK and ADCC activity was evaluated. Cytotoxic cells mediating both activities are resistant to FK506. In contrast, preincubation of ADCC and NK effectors with cyclosporine decreases their cytotoxic potential, while adding the drug to the assays is without effect. ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199101000-00045

    authors: Wasik M,Gorski A,Stepien-Sopniewska B,Lagodzinski Z

    更新日期:1991-01-01 00:00:00

  • The asystolic donor syndrome: transaminitis and thrombocytopenia after non-heartbeating renal transplantation.

    abstract:BACKGROUND:The use of kidneys from non-heartbeating donors (NHB) remains controversial. An increased incidence of delayed primary function and primary nonfunction is common. We report a characteristic syndrome of transaminitis and thrombocytopenia after NHB renal transplantation, which may be predictive of graft outcom...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199705270-00005

    authors: Andrews PA,Denton MD,Compton FC,Koffman CG

    更新日期:1997-05-27 00:00:00

  • Cytotoxic and agglutinating H-Y antibodies in multiparous female mice.

    abstract::Pregnancy in inbred mice is associated with long-term accceptance of H-Y-incompatible skin grafts (in some "rejector" strain females) and with the formation of cytotoxic and agglutinating H-Y antibodies (in females generally). Yet there is no evident correlation between the two phenomena; postpartum females of nonreje...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:

    authors: Krupen-Brown K,Wachtel SS

    更新日期:1979-06-01 00:00:00