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
Transplantationjournal_title
Transplantationauthors
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 Mdoi
10.1097/00007890-200212150-00003subject
Has Abstractpub_date
2002-12-15 00:00:00pages
1489-96issue
11eissn
0041-1337issn
1534-6080journal_volume
74pub_type
杂志文章相关文献
TRANSPLANTATION文献大全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
更新日期:2005-09-15 00:00:00
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
更新日期:1990-11-01 00:00:00
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
更新日期:2016-08-01 00:00:00
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
更新日期:2018-07-01 00:00:00
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
更新日期:1990-03-01 00:00:00
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
更新日期:2011-01-27 00:00:00
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
更新日期:2013-07-27 00:00:00
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
更新日期:2007-03-27 00:00:00
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
更新日期:2002-06-15 00:00:00
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
更新日期:2002-02-27 00:00:00
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
更新日期:2015-12-01 00:00:00
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
更新日期:2008-12-27 00:00:00
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
更新日期:2007-07-27 00:00:00
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
更新日期:1983-11-01 00:00:00
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
更新日期:2013-01-27 00:00:00
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
更新日期:2006-07-15 00:00:00
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
更新日期:1976-06-01 00:00:00
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
更新日期:2003-05-15 00:00:00
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
更新日期:1998-07-27 00:00:00
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
更新日期:1988-02-01 00:00:00
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
更新日期:2002-12-27 00:00:00
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
更新日期:1987-03-01 00:00:00
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
更新日期:1991-07-01 00:00:00
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
更新日期:1998-01-27 00:00:00
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
更新日期:2015-11-01 00:00:00
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
更新日期:2005-12-27 00:00:00
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:
更新日期:1994-12-27 00:00:00
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
更新日期:2011-07-15 00:00:00
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
更新日期:2016-10-01 00:00:00
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
更新日期:2016-12-01 00:00:00