Proapoptotic Bax is hyperexpressed in isolated human islets compared with antiapoptotic Bcl-2.

Abstract:

BACKGROUND:Apoptosis is a well-documented pathway for islet cell death. One potential mechanism is overexpression of death-promoting Bax compared with antiapoptotic Bcl-2 in islets. METHODS:We isolated islets from 10 human pancreata and measured the expression of Bax mRNA and Bcl-2 mRNA by real-time quantitative polymerase chain reaction; islet and pancreas expression of Bax, Bcl-2, activated caspase-3, and cleaved poly (ADP-ribose) polymerase were also assessed by immunohistochemistry. Islet cell apoptosis was evaluated by terminal deoxynucleotide transferase-mediated dUTP nick-end labeling (TUNEL) assay and by flow cytometry. RESULTS:The mean (+/-SE) level of Bax mRNA was 336+/-79 copies per nanogram of total RNA, and the level of Bcl-2 mRNA was 36+/-10 (P=0.001). A positive correlation existed between islet expression of Bax mRNA and Bcl-2 mRNA (P=0.001). The islet Bax to Bcl-2 ratio was 10.8+/-1.3 and 1.71+/-0.3 for the spleens (P=0.0001). Bax mRNA (P=0.04), but not Bcl-2 mRNA, was expressed at a higher level in islets compared with spleens. Human islets contained large numbers of cells expressing Bax protein, whereas only infrequent islet cells expressed Bcl-2 protein, activated caspase-3, and poly (ADP-ribose) polymerase. The apoptotic index was 5% by TUNEL assay, and the percentage of apoptotic islet cells was 9.7+/-2.5% by flow cytometry. Sections of human pancreas before islet isolation showed islet staining for Bax but not Bcl-2. CONCLUSIONS:Our finding that isolated human islets express Bax at a higher level compared with Bcl-2 suggests a molecular mechanism for islet cell death by apoptosis. We hypothesize that reducing islet expression of Bax, or regulating its activation, will help preserve islet cell mass after islet transplantation.

journal_name

Transplantation

journal_title

Transplantation

authors

Thomas D,Yang H,Boffa DJ,Ding R,Sharma VK,Lagman M,Li B,Hering B,Mohanakumar T,Lakey J,Kapur S,Hancock WW,Suthanthiran M

doi

10.1097/00007890-200212150-00003

subject

Has Abstract

pub_date

2002-12-15 00:00:00

pages

1489-96

issue

11

eissn

0041-1337

issn

1534-6080

journal_volume

74

pub_type

杂志文章
  • Selection of a suitable internal control gene for expression studies in pancreatic islet grafts.

    abstract::The use of real-time reverse transcription polymerase chain reaction to compare gene expression in different tissues and conditions requires normalization to an internal control that must be expressed at a constant level. Although a previous validation step is required to confirm that an internal control is appropriat...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/01.tp.0000173790.12227.7b

    authors: Rodriguez-Mulero S,Montanya E

    更新日期:2005-09-15 00:00:00

  • Fine-needle aspiration biopsy in the monitoring of liver allografts. Different cellular findings during rejection and cytomegalovirus infection.

    abstract::Fine-needle aspiration biopsies were used for clinical monitoring of liver allografts; 21 patients with an inflammatory episode of acute rejection (12.0 +/- 3.3 CIU at the peak) were studied; all episodes were reversible. The inflammatory infiltrate consisted mainly of lymphoid cells, including lymphoid blasts, with i...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199011000-00011

    authors: Lautenschlager I,Höckerstedt K,Salmela K,Isoniemi H,Holmberg C,Jalanko H,Häyry P

    更新日期:1990-11-01 00:00:00

  • Factors Associated With Changes in Body Composition Shortly After Orthotopic Liver Transplantation: The Potential Influence of Immunosuppressive Agents.

    abstract:BACKGROUND:This study aimed to determine factors associated with body composition changes shortly after liver transplantation (LTx), including the influence of immunosuppressive agents. The combined resting energy expenditure (REE) and handgrip strength provided a valuable assessment in data interpretation of body comp...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0000000000001202

    authors: Brito-Costa A,Pereira-da-Silva L,Papoila AL,Alves M,Mateus É,Nolasco F,Barroso E

    更新日期:2016-08-01 00:00:00

  • Solid Organ Transplantation in Patients With Preexisting Malignancies in Remission: A Propensity Score Matched Cohort Study.

    abstract:BACKGROUND:Solid-organ transplant recipients with pretransplant malignancies (PTM) have worse overall survival (OS) compared to recipients without history of malignancy. However, it is unknown whether the increased risk of mortality is due to recurrent cancer-related deaths. METHODS:All solid-organ transplant recipien...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0000000000002178

    authors: Acuna SA,Sutradhar R,Kim SJ,Baxter NN

    更新日期:2018-07-01 00:00:00

  • A novel sulphate conjugate of cyclosporine occurring in high concentrations in vivo.

    abstract::A novel, water-soluble metabolite of cyclosporine, a sulphate conjugate, present in high concentrations in human bile and plasma was evaluated for its immunosuppressive properties. The direct binding of the conjugate to surface molecules on lymphocytes was studied. The effect of the metabolite was tested in several in...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199003000-00027

    authors: Johansson A,Henricsson S,Möller E

    更新日期:1990-03-01 00:00:00

  • The clinical utility of whole blood versus plasma cytomegalovirus viral load assays for monitoring therapeutic response.

    abstract:BACKGROUND:In patients with cytomegalovirus (CMV) disease, regular monitoring of viral loads and treatment until negative are recommended. However, with more sensitive polymerase chain reaction (PCR) assays and cellular peripheral sample types, detection of low-level viremia is achievable. We compared a whole blood rea...

    journal_title:Transplantation

    pub_type: 杂志文章,多中心研究,随机对照试验

    doi:10.1097/TP.0b013e3181ff8719

    authors: Lisboa LF,Asberg A,Kumar D,Pang X,Hartmann A,Preiksaitis JK,Pescovitz MD,Rollag H,Jardine AG,Humar A

    更新日期:2011-01-27 00:00:00

  • Release of soluble CD30 after allogeneic stimulation is mediated by memory T cells and regulated by IFN-γ and IL-2.

    abstract:BACKGROUND:Membrane CD30 is an important costimulatory molecule for activated T lymphocytes, and serum level of soluble CD30 (sCD30) is considered a marker for predicting outcome in kidney transplantation. METHODS:We investigated the kinetics of CD30 expression on CD4 and CD8 T-cell populations and the source of sCD30...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0b013e318296fd69

    authors: Velásquez SY,García LF,Opelz G,Alvarez CM,Süsal C

    更新日期:2013-07-27 00:00:00

  • Saliva secretion stimulated by grafted nerve in submandibular gland allograft in dogs.

    abstract:BACKGROUND:Recent studies have described submandibular gland allografts in animal models; however, the amount of saliva secretion or nervous regeneration in those animals have not been reported. Herein, we investigated saliva secretion from submandibular gland allografts in beagle dogs. METHODS:Using a vascularized su...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/01.tp.0000258598.27904.d7

    authors: Isomura ET,Yoshitomi K,Hamaguchi M,Kogo M

    更新日期:2007-03-27 00:00:00

  • Antisense deoxyoligonucleotides or antibodies to murine MD-1 inhibit rejection of allogeneic and xenogeneic skin grafts in C3H mice.

    abstract:BACKGROUND:Altered expression of murine MD-1, a molecule controlling expression of members of the interleukin (IL)-1 receptor family of signaling proteins, regulates antigen-presenting cell-induced alloreactions. We investigated the effect of treatment with antisense deoxyoligonucleotides or antibodies to MD-1 in vivo ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200206150-00013

    authors: Hadidi S,Chen Z,Phillips J,Yu K,Gorczynski RM

    更新日期:2002-06-15 00:00:00

  • Disseminated varicella infection in adult renal allograft recipients: four cases and a review of the literature.

    abstract::Disseminated varicella-zoster (VZV) infection is a rare complication after renal allotransplantation in adults. We report four patients, among them one with combined VZV and cytomegalovirus infection. The main complications were hepatitis, pneumonitis, and disseminated intravascular coagulation. A review of the litera...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200202270-00023

    authors: Fehr T,Bossart W,Wahl C,Binswanger U

    更新日期:2002-02-27 00:00:00

  • Association Between Organ Procurement Organization Social Network Centrality and Kidney Discard and Transplant Outcomes.

    abstract:BACKGROUND:Given growth in kidney transplant waitlists and discard rates, donor kidney acceptance is an important problem. We used network analysis to examine whether organ procurement organization (OPO) network centrality affects discard and outcomes. METHODS:We identified 106,160 deceased donor kidneys recovered for...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0000000000000773

    authors: Butala NM,King MD,Reitsma W,Formica RN,Abt PL,Reese PP,Parikh CR

    更新日期:2015-12-01 00:00:00

  • Tolerance induction in a large-animal model using total lymphoid irradiation and intrathymic bone marrow.

    abstract:BACKGROUND:Immunological unresponsiveness of T cells to alloantigen can be induced by intrathymic injection of donor-specific antigen in small-animal models. Intrathymic tolerance to vascularized grafts in large animals has not previously been reported. METHODS:Thirty-two dogs were allocated into dog leukocyte antigen...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0b013e3181910e67

    authors: Horton PJ,Hawthorne WJ,Walters S,Patel T,Stewart GJ,Allen RD,Chapman JR

    更新日期:2008-12-27 00:00:00

  • Absence of c4d deposition in human composite tissue (hands and face) allograft biopsies: an immunoperoxidase study.

    abstract::Deposition of the C4d complement degradation product has been shown to be a marker of antibody-mediated rejection of solid organ allografts, including kidney, heart, liver, and lung. We investigated whether C4d deposition also would be useful in monitoring rejection in human composite tissue allografts. A total of 60 ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/01.tp.0000266899.93315.52

    authors: Kanitakis J,McGregor B,Badet L,Petruzzo P,Morelon E,Devauchelle B,Dubernard JM

    更新日期:2007-07-27 00:00:00

  • Enhancement of rat kidney allografts using haptenated alloantigens and antihapten antibody.

    abstract::The survival of semiallogeneic or fully allogeneic rat kidney allografts was prolonged in some strain combinations with immune complexes formed with hapten-conjugated alloantigens (TNP-Ag) of donor origin and a mouse monoclonal antihapten antibody (anti-TNP). Complexes were administered i.v. at the time of operation--...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198311000-00001

    authors: Barber WH,Hutchinson IV,Morris PJ

    更新日期:1983-11-01 00:00:00

  • Heart rate after cardiac transplantation-lessons from the tortoise and the shrew.

    abstract::There is a striking consistency in the total number of heart beats accrued over a lifetime across a range of animal species despite vast differences in size. Moreover, an inverse relationship is observed between heart rate and lifespan, leading to speculation that elevated heart rate could significantly affect longevi...

    journal_title:Transplantation

    pub_type: 社论,评审

    doi:10.1097/TP.0b013e31826bc42a

    authors: Critchley WR,Yonan N,Shaw SM,Fildes JE

    更新日期:2013-01-27 00:00:00

  • Treatment of patients with recurrent hepatitis C after liver transplantation with peginterferon alfa-2B plus ribavirin.

    abstract:BACKGROUND:Recurrent hepatitis C virus (HCV) after liver transplantation (OLT) is a major cause of graft loss in HCV-positive patients. In this study, we evaluated the efficacy and safety of pegylated interferon alfa-2b (peginterferon) and ribavirin treatment for recurrent HCV after OLT and analyzed the influence of an...

    journal_title:Transplantation

    pub_type: 临床试验,杂志文章

    doi:10.1097/01.tp.0000225827.18034.be

    authors: Neumann U,Puhl G,Bahra M,Berg T,Langrehr JM,Neuhaus R,Neuhaus P

    更新日期:2006-07-15 00:00:00

  • A sensitive micromethod for generating and assaying allogeneically induced cytotoxic human lymphocytes.

    abstract::A sensitive micromethod for generating and assaying allogeneically induced cytotoxic human lymphocytes in vitro is described. Responding lymphocytes are cultured with mitomycin-C treated allogeneic stimulating cells in wells of replicate microtrays for both one-way mixed leukocyte culture (MLC) and cell-mediated lymph...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-197606000-00005

    authors: Zarling JM,McKeough M,Bach FH

    更新日期:1976-06-01 00:00:00

  • The role of self-expandable metallic stents for the treatment of airway complications after lung transplantation.

    abstract:BACKGROUND:Airway complications continue to be an important source of morbidity and mortality after lung transplantation (LTx). Different approaches have been used for their nonsurgical management. We describe our experience using self-expandable metallic stents (SEMSs) in patients with airway complications post-LTx. ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/01.TP.0000061229.83500.A0

    authors: Saad CP,Ghamande SA,Minai OA,Murthy S,Pettersson G,DeCamp M,Mehta AC

    更新日期:2003-05-15 00:00:00

  • Anti-Gal(alpha)1-3Gal antibody response to porcine bone marrow in unmodified baboons and baboons conditioned for tolerance induction.

    abstract:BACKGROUND:Mixed lymphohematopoietic chimerism can provide an effective means of inducing longterm immunological tolerance and has been documented in a monkey allograft model. A conditioning regimen including nonmyeloablative or myeloablative irradiation and splenectomy has been used to induce chimerism in a pig-to-pri...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199807270-00006

    authors: Kozlowski T,Monroy R,Xu Y,Glaser R,Awwad M,Cooper DK,Sachs DH

    更新日期:1998-07-27 00:00:00

  • Improvement of renal preservation by verapamil with 24-hour cold perfusion in the isolated rat kidney.

    abstract::There is substantial evidence that increased cellular calcium may activate processes that lead to cellular injury and death, and calcium entry blockers (CEB) have been shown to protect against renal ischemic injury. This approach has been used experimentally to enhance kidney preservation during both warm and cold isc...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-198802000-00012

    authors: Nakamoto M,Shapiro JI,Mills SD,Schrier RW,Chan L

    更新日期:1988-02-01 00:00:00

  • Plasminogen activator inhibitor-1 polymorphism is associated with progressive renal dysfunction after acute rejection in renal transplant recipients.

    abstract:BACKGROUND:Plasma level of plasminogen activator inhibitor (PAI)-1 is genetically determined by a polymorphism in the promoter region, involving two alleles, 4G and 5G. Plasma PAI-1 concentrations are higher in subjects homozygous for the 4G allele than other genotypes (5G/5G and 4G/5G). Such genetic variation in fibri...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-200212270-00026

    authors: Chow KM,Szeto CC,Szeto CY,Poon P,Lai FM,Li PK

    更新日期:2002-12-27 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

  • The effect of two new immunosuppressive agents, FK506 and didemnin B, in murine pregnancy.

    abstract::The purpose of this study was to investigate two promising immunosuppressive agents, didemnin B (DB) and FK506 (FK), during pregnancy to assess potential adverse maternal or fetal effects. Pregnant C3H mice were randomized into control and high- and low-dose treatment groups for each drug. Animals received daily injec...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199107000-00022

    authors: Farley DE,Shelby J,Alexander D,Scott JR

    更新日期:1991-07-01 00:00:00

  • Venous thromboembolic complications after kidney and kidney-pancreas transplantation: a multivariate analysis.

    abstract:BACKGROUND:We reviewed the incidence of and risk factors for venous thromboembolic complications in our population of kidney (KTx) and simultaneous kidney-pancreas transplant (SPK) recipients. METHODS:Information was collected retrospectively from a database on 1833 KTx and 276 SPK recipients who underwent transplant ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/00007890-199801270-00015

    authors: Humar A,Johnson EM,Gillingham KJ,Sutherland DE,Payne WD,Dunn DL,Wrenshall LE,Najarian JS,Gruessner RW,Matas AJ

    更新日期:1998-01-27 00:00:00

  • A Phase I/II Trial of the Interleukin-6 Receptor-Specific Humanized Monoclonal (Tocilizumab) + Intravenous Immunoglobulin in Difficult to Desensitize Patients.

    abstract:BACKGROUND:Current desensitization (DES) methods are not always effective. Thus, novel, more effective approaches are desirable. Interleukin (IL)-6 is an attractive target as it promotes B-cell differentiation to plasma cells, is important for immunoglobulin production, and induces Th17 cells. Here, we undertook a phas...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0000000000000741

    authors: Vo AA,Choi J,Kim I,Louie S,Cisneros K,Kahwaji J,Toyoda M,Ge S,Haas M,Puliyanda D,Reinsmoen N,Peng A,Villicana R,Jordan SC

    更新日期:2015-11-01 00:00:00

  • Outcome, incidence, and timing of infectious complications in small bowel and multivisceral organ transplantation patients.

    abstract:BACKGROUND:Infectious complications still represent a major cause of morbidity and mortality in patients with organ transplantation. In particular, small bowel or multivisceral transplantation is complicated to a greater extent than other grafts as a consequence of infectious complications including sepsis. METHODS:Th...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/01.tp.0000185622.91708.57

    authors: Guaraldi G,Cocchi S,Codeluppi M,Di Benedetto F,De Ruvo N,Masetti M,Venturelli C,Pecorari M,Pinna AD,Esposito R

    更新日期:2005-12-27 00:00:00

  • Divergent patterns of ELAM-1, ICAM-1, and VCAM-1 expression on cytomegalovirus-infected endothelial cells.

    abstract::Endothelial cells, one of several in vivo host cells for cytomegalovirus (CMV), participate in solid organ allograft rejection in part through the expression of leukocyte adhesion molecules. The hypothesis that CMV infection alters the constitutive and induced expression of ELAM-1, ICAM-1, and VCAM-1 on infected human...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:

    authors: Sedmak DD,Knight DA,Vook NC,Waldman JW

    更新日期:1994-12-27 00:00:00

  • Antibody testing strategies for deceased donor kidney transplantation after immunomodulatory therapy.

    abstract:BACKGROUND:Immunomodulatory protocols including intravenous immunoglobulin/rituximab (IVIG/R) are employed to decrease anti-human leukocyte antigen (HLA) antibody levels for patients broadly sensitized to HLA and increase chances for transplantation with a compatible deceased donor (DD). The aim of our study was to ide...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0b013e31821eab8a

    authors: Lai CH,Cao K,Ong G,Naim M,Wang Q,Mirocha J,Vo A,Jordan SC,Reinsmoen NL

    更新日期:2011-07-15 00:00:00

  • Racial Differences in Survival of Incident Home Hemodialysis and Kidney Transplant Patients.

    abstract:BACKGROUND:Previous studies have indicated that patients on maintenance hemodialysis have worse survival compared with kidney transplant (KTx) recipients. However, none of these studies have compared mortality of the US patients using alternative dialysis modalities such as home hemodialysis (HHD) with KTx recipients. ...

    journal_title:Transplantation

    pub_type: 杂志文章

    doi:10.1097/TP.0000000000001005

    authors: Molnar MZ,Ravel V,Streja E,Kovesdy CP,Mehrotra R,Kalantar-Zadeh K

    更新日期:2016-10-01 00:00:00

  • A Call for Research on Individuals Who Opt Out of Living Kidney Donation: Challenges and Opportunities.

    abstract::In light of the transplant community's efforts to increase living donation, preserving donor autonomy is essential. Understanding how often and the reasons why potential living kidney donors opt out of the donor evaluation process for nonmedical reasons is important for assessing donor voluntariness. The experiences o...

    journal_title:Transplantation

    pub_type: 杂志文章,评审

    doi:10.1097/TP.0000000000001408

    authors: Thiessen C,Kulkarni S,Reese PP,Gordon EJ

    更新日期:2016-12-01 00:00:00