Abstract:
:The enzyme glutamate decarboxylase-65 (GAD65) is a major autoantigen in autoimmune diabetes. The mechanism whereby autoreactivity to GAD65, an intracellular protein, is triggered is unknown, and it is possible that immunoreactive GAD65 is released by injured pancreatic islet beta-cells. There is a great need for methods by which to detect and monitor ongoing islet injury. If GAD65 were released and, furthermore, were able to reach the circulation, it could function as a marker of beta-cell injury. Here, a novel GAD65 plasma immunoassay is used to test the hypotheses that beta-cell injury induces GAD65 discharge in vivo and that discharged GAD65 reaches the bloodstream. Plasma GAD65 levels were determined in rats treated with alloxan, and with diabetogenic and low, subdiabetogenic doses of streptozotocin. beta-Cell injury resulted in GAD65 release into the circulation in a dose-dependent manner, and low-dose streptozotocin resulted in a more gradual increase in plasma GAD65 levels than did diabetogenic doses. Plasma GAD65 levels were reduced in rats that had undergone partial pancreatectomy and remained undetectable in mice. Together, these data demonstrate that GAD65 can be released into the circulation by injured beta-cells. Autoantigen shedding may contribute to the pathogenesis of islet autoimmunity in the multiple low-dose streptozocin model and perhaps, more generally, in other forms of autoimmune diabetes. These results demonstrate that, as is true with other tissues, islet injury, at least in some circumstances, can be monitored by use of discharged, circulating proteins. GAD65 is the first such confirmed protein marker of islet injury.
journal_name
Endocrinologyjournal_title
Endocrinologyauthors
Waldrop MA,Suckow AT,Marcovina SM,Chessler SDdoi
10.1210/en.2006-1367subject
Has Abstractpub_date
2007-10-01 00:00:00pages
4572-8issue
10eissn
0013-7227issn
1945-7170pii
en.2006-1367journal_volume
148pub_type
杂志文章相关文献
ENDOCRINOLOGY文献大全abstract::As the regulator of pituitary reproductive hormone synthesis, the hypothalamic neuropeptide GnRH is the central regulator of reproduction. A hallmark of GnRH action is the differential control of gene expression in pituitary gonadotropes through varied pulsatile stimulation. Among other signaling events, GnRH activati...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/en.2009-1483
更新日期:2010-10-01 00:00:00
abstract::Mouse fibroblast cell lines which secrete bovine (b) GH have been generated. This was accomplished by cotransforming mouse L cells (thymidine kinase-negative [TK-] and adenine phosphoribosyl transferase-negative [APRT-]) with DNA molecules encoding the Rous sarcoma virus-long-terminal repeat and bGH genes along with t...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-119-4-1489
更新日期:1986-10-01 00:00:00
abstract::The microenvironment of placental mesenchymal stem cells (PMSCs) is dynamic throughout gestation and determines changes in cell fate. In vivo, PMSCs initially develop in low-oxygen tension and low IGF-I concentrations, and both increase gradually with gestation. The impact of varying concentrations of IGF-I and changi...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/en.2013-1842
更新日期:2014-04-01 00:00:00
abstract::Carboxyl-terminal fragments of PTH (C-PTH) appear to have biological properties different from those mediated by the amino-terminal portions of PTH and PTH-related peptide (PTHrP). To characterize a C-PTH receptor that may be involved in mediating these functions, we performed RRAs and affinity cross-linking studies w...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.136.11.7588200
更新日期:1995-11-01 00:00:00
abstract::We have previously reported that the acute injection of interleukin-1 beta (IL-1 beta) into the brain ventricles of intact female rats promptly decreases LHRH release and inhibits gene expression of this peptide in the medial preoptic area (MPOA). The present studies were therefore designed to determine whether contin...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.133.6.8243260
更新日期:1993-12-01 00:00:00
abstract::We have investigated the adrenergic control of mitogen-activated protein kinase (MAPK) activity in brown adipocytes. Cold exposure in rats led to an activation of MAPK in brown adipose tissue, as determined by the gel mobility shift assay and in-gel kinase assay. In contrast, no activation was seen after surgical symp...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.138.1.4832
更新日期:1997-01-01 00:00:00
abstract::L-Asparaginase (ASNase), a drug widely used in the treatment of acute lymphoblastic leukemia, has been reported to decrease serum T4-binding globulin (TBG) levels, while results of serum albumin determinations were conflicting. This effect in vivo has been attributed to depressed liver protein synthesis, but this hypo...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-119-3-1185
更新日期:1986-09-01 00:00:00
abstract::The aim of our study was to isolate and identify novel proteins that are involved in the process of ovulation. To achieve this goal we used the technique of proteome analysis. Comparison of ovary protein patterns, obtained by high resolution two-dimensional gel electrophoresis from recombinant FSH (rFSH)- and rFSH + h...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.141.7.7569
更新日期:2000-07-01 00:00:00
abstract::In previous studies we demonstrated a much greater rate of glucose cycling (glucose-->glucose-6-P-->glucose) in islets from ob/ob mice than from lean litter mates. Cycling was further augmented by dexamethasone treatment. To determine whether these findings could be accounted for by increased islet glucose-6-phosphata...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.136.5.7720640
更新日期:1995-05-01 00:00:00
abstract::This study was conducted to determine the feasibility of using replication-defective adenovirus vectors to express receptors for LH. Two vectors were constructed, one that directs the expression of wild-type human LH receptor (LHr; AdRSVLHrwt) and another that directs the expression of the constitutively activated D57...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.142.6.8017
更新日期:2001-06-01 00:00:00
abstract::An estrogen-responsive uterine proenzyme of a proteinase in the immature rat uterus has been known for some time. Its mol wt is 77,000, its N-terminal amino acid sequence is the same as prothrombin's for 15 residues, it contains gamma-carboxyl glutamate residues, its biosynthesis is prevented by warfarin, it cross-rea...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-126-1-167
更新日期:1990-01-01 00:00:00
abstract::Intact 23 kilodalton (kDa), rat PRL is enzymatically cleaved in many target tissues to a 16 kDa (16K PRL) and an 8 kDa fragment. After reduction of an internal disulfide bond the fragments are released. 16K PRL was shown to be a potent mitogen on mammary epithelial cells via PRL receptors. Since estradiol-induced prol...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-129-2-896
更新日期:1991-08-01 00:00:00
abstract::Hyperandrogenism is the central feature of polycystic ovary syndrome (PCOS). Due to the intricate relationship between hyperandrogenism and insulin resistance in PCOS, 50%-70% of these patients also present with hyperinsulinemia. Metformin, an insulin sensitizer, has been used to reduce insulin resistance and improve ...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/en.2015-1733
更新日期:2016-01-01 00:00:00
abstract::Adrenomedullin (AM), a potent and novel vasodilator 52-residue peptide originally isolated from pheochromocytoma, is processed from a precursor molecule (preproAM) in which another unique 20-residue sequence, termed proadrenomedullin N-terminal 20 peptide (PAMP), exists. Using [125I Tyr0] rat PAMP as a radioligand, we...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.137.7.8770930
更新日期:1996-07-01 00:00:00
abstract::Mutations in the PCSK1 gene encoding prohormone convertase 1/3 (PC1/3) are strongly associated with obesity in humans. The PC1/3(N222D) mutant mouse thus far represents the only mouse model that mimics the PC1/3 obesity phenotype in humans. The present investigation addresses the cell biology of the N222D mutation. Me...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/en.2013-1985
更新日期:2014-07-01 00:00:00
abstract::Studies were undertaken to investigate the effects of synthetic 1-24 adrenocorticotropin (ACTH), bovine alpha melanocyte-stimulating hormone (alpha-MSH), and ovine beta lipotropin (beta-LPH) on plasma calcium and phosphate in rabbits. Equimolar concentrations of these hormones were infused intravenously in intact and ...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-97-6-1593
更新日期:1975-12-01 00:00:00
abstract::We have compared the physicochemical properties of rat uterine nuclear estrogen receptors (ER) labeled with (E2) or the high affinity antiestrogen 4-hydroxytamoxifen [OH Tam; 1-[4-(2-dimethylaminoethoxy)phenyl]-1-(4-hydroxyphenyl) 2-phenyl-but-1-(Z)ene]. Nuclear ER labeled in vivo with either ligand had sedimentation ...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-119-2-904
更新日期:1986-08-01 00:00:00
abstract::We recently identified a 32 K mol wt insulin-like growth factor (IGF)-binding protein (BP) which is markedly increased in the serum of streptozotocin-diabetic rats and recognized by antiserum against the human amniotic fluid IGFBP (hIGFBP-1). In the present study we sought to confirm that this protein represents the r...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-127-2-789
更新日期:1990-08-01 00:00:00
abstract::High-fat diet and intrauterine growth retardation may predispose to obesity, insulin resistance, and type 2 diabetes. Because prenatal ethanol (ETOH) exposure causes intrauterine growth retardation, we investigated its interactions with postnatal high-fat diet on glucose tolerance and adipocyte-derived hormones in the...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/en.2002-220623
更新日期:2003-02-01 00:00:00
abstract::Ovarian steroids act on unidentified neurons to trigger preovulatory secretion of GnRH. In the rat, important steroid target cells reside in the anterior medial preoptic nucleus (AMPN), a sexually dimorphic structure essential for stimulatory effects of ovarian steroids on LH secretion. The AMPN contains neurotensin (...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-125-4-2111
更新日期:1989-10-01 00:00:00
abstract::The binding properties of the gamma-emitting 125I-labeled 11 beta-methoxy analog of 16 alpha-iodoestradiol, 11 beta-methoxy-16 alpha-iodoestradiol (MIE2), were characterized for its use in vivo as a ligand for the measurement and localization of estrogen-binding sites. In binding displacement studies, MIE2 bound to ra...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-124-5-2074
更新日期:1989-05-01 00:00:00
abstract::Prolonged stimulation of cells by beta-adrenergic receptor agonists may lead to diminished responsiveness of the cells to subsequent activation by catecholamines. This phenomenon has been termed desensitization; the mechanism(s) for desensitization may involve an apparent loss in the number of beta-adrenergic receptor...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-114-4-1272
更新日期:1984-04-01 00:00:00
abstract::To investigate the respective role in PRL secretion of gamma-aminobutyric acid (GABA), either derived from the central nervous system or circulating in plasma, experiments were performed using ethanolamine-O-sulfate (EOS), a specific inhibitor of GABA catabolism. Intracerebroventricular injection of EOS (2 mg/kg) indu...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-108-4-1505
更新日期:1981-04-01 00:00:00
abstract::Transcription activator-like effector nucleases (TALENs) are a powerful approach for targeted genome editing and have been proved to be effective in several organisms. In this study, we reported that TALENs can induce somatic mutations in Nile tilapia, an important species for worldwide aquaculture, with reliably high...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/en.2013-1451
更新日期:2013-12-01 00:00:00
abstract::The somatic Sertoli cells of the testis are major targets for FSH and are important for the regulation of spermatogenesis. The binding of FSH to Sertoli cells activates the cAMP-dependent protein kinase A signaling pathway, resulting in phosphorylation of the cAMP response element-binding protein (CREB), which is requ...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.136.8.7628390
更新日期:1995-08-01 00:00:00
abstract::In the present study, we report that ACTH induces a transient chloride current. The lack of correlation between ACTH-induced cAMP production and amplitude of the Cl- current, as well as the absence of stimulation by forskolin or 8Br-cAMP indicated that the ACTH-induced current was not cAMP-dependent. We explored the p...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.141.2.7328
更新日期:2000-02-01 00:00:00
abstract::The conversion of T4 to T3 in the brain and anterior pituitary gland contributes significantly to the T3 content of these tissues and appears to be an important modulator of thyroid hormone action. In the present study, the antimanic agent lithium was demonstrated in cultured neural and pituitary tissue to have a sign...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-120-4-1430
更新日期:1987-04-01 00:00:00
abstract::Testicular peritubular cells are myofibroblastic cells, which represent the major cellular components of the wall of the seminiferous tubules. In men their phenotypic characteristics, including possible secretory activity and regulation, are not well known, in neither normal nor pathologically altered testes. Especial...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/en.2007-1064
更新日期:2008-04-01 00:00:00
abstract::Signals derived from other pituitary cells can have a dramatic effect on PRL gene expression and secretion by mammotropes. However, the intracellular mechanisms by which these effects are manifested on the target cell remain unexplored. Inasmuch as calcium is a key modulator of both gene expression and hormone export ...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo.139.6.6071
更新日期:1998-06-01 00:00:00
abstract::In rat uterus and prostate, 7 alpha, 17 alpha-dimethyl-19-nortestosterone (DMNT) binds to the androgen receptor specifically and with high affinity. However, this steroid does not bind to glucocorticoid receptors, since it does not displace binding of [3H]triamcinolone acetonide in calf thymus cytosol. In calf uterine...
journal_title:Endocrinology
pub_type: 杂志文章
doi:10.1210/endo-118-4-1327
更新日期:1986-04-01 00:00:00