LETM1 is a potential biomarker that predicts poor prognosis in gastric adenocarcinoma.

Abstract:

:Leucine zipper-EF-hand containing transmembrane protein 1 (LETM1) is closely linked to the occurrence and development of many malignant tumors. Many studies have reported that enhanced expression of LETM1 in several types of human cancers was associated with poor clinical outcomes; however, its clinical significance in gastric adenocarcinoma (GA) has not been elucidated. In this study, we assessed the expression of LETM1 along with the genes related to cancer stemness, cell cycle, and PI3K/Akt signaling in 189 paraffin-embedded GA tissue samples and GA-derived cell lines using immunohistochemistry (IHC), western blotting, and immunofluorescence. Our results showed that the expression of LETM1 was strongly correlated with the tumor grade, primary tumor (pT) stage, lymph node metastasis, clinical stage, and tumor gross type of GA. The Kaplan-Meier survival analysis revealed that patients with GA with high expression of LETM1 exhibit a shorter overall survival (OS) rate. Univariate and multivariate Cox regression analysis indicated that LETM1 is an independent poor prognostic factor of GA. Significantly, LETM1 expression was positively correlated with the expression of cancer stemness-related genes such as CD44 and LGR5 and expression of cell-cycle related gene, cyclin D1. Further, the expression of proteins involved in PI3K/Akt signaling pathway, such as pPI3K-p85 and pAkt-Thr308, was also increased. Additionally, small interfering RNA (esiRNA)-mediated silencing of LETM1 expression in GA-derived cell lines MKN28 and MKN74 strongly inhibited the expression of stemness and cell cycle-related proteins, suppressed cancer cell spheroid formation, migration and invasion ability, and affected cell cycle distribution. Furthermore, the GA-derived cell line AGS exhibited enhanced expression of LETM1, CD44, LGR5, and HIF1-α under hypoxic conditions. Lastly, we blocked PI3K expression using an inhibitor LY294002, which downregulated the expression of LETM1, pPI3K-p85, and pAkt-Thr308. Taken together, our results demonstrate that LETM1 regulates cell proliferation and promotes tumorigenicity of GA, and its overexpression is associated with the poor progression of GA. Therefore, LETM1 could serve as a potential prognostic biomarker and a therapeutic target for the better clinical management of GA.

journal_name

Exp Mol Pathol

authors

Li H,Piao L,Xu D,Xuan Y

doi

10.1016/j.yexmp.2019.104333

subject

Has Abstract

pub_date

2020-02-01 00:00:00

pages

104333

eissn

0014-4800

issn

1096-0945

pii

S0014-4800(19)30780-4

journal_volume

112

pub_type

杂志文章
  • EZH2 is upregulated in the proliferation centers of CLL/SLL lymph nodes.

    abstract::Lymph node involvement of chronic lymphocytic leukaemia/small lymphocytic lymphoma (CLL/SLL) is characterised by the diffuse infiltration of small neoplastic lymphocytes, which is accompanied by the presence of proliferation centres (PCs) comprising prolymphocytes and paraimmunoblasts. There is increasing evidence of ...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2018.07.009

    authors: Szurián K,Csala I,Marosvári D,Rajnai H,Dezső K,Bödör C,Piurkó V,Matolcsy A,Reiniger L

    更新日期:2018-10-01 00:00:00

  • Characterization of gene expression profiling of mouse tissues obtained during the postmortem interval.

    abstract::Attempts to establish a tissue bank from autopsy samples have led to uncovering of the secrets of many diseases. Here, we examined the length of time that the RNA from postmortem tissues is available for microarray analysis and reported the gene expression profile for up- and down-regulated genes during the postmortem...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2016.05.007

    authors: Sobue S,Sakata K,Sekijima Y,Qiao S,Murate T,Ichihara M

    更新日期:2016-06-01 00:00:00

  • Increased degradation in rat liver induced by antilipolytic agents: a model for studying autophagy and protein degradation in liver?

    abstract::A dramatic increase in the plasma glucagon/insulin ratio can be induced by treating fasted rats with antilipolytic drugs (e.g., with 3,5-dimethylpyrazole, 12 mg/kg body wt). These hormone changes are the physiologically appropriate response to a rapid decrease in free fatty acids and glucose plasma levels. Under this ...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(87)90035-9

    authors: Bergamini E,De Tata V,Cubeddu TL,Masiello P,Pollera M

    更新日期:1987-02-01 00:00:00

  • Respiratory reovirus 1/L induction of diffuse alveolar damage: a model of acute respiratory distress syndrome.

    abstract::Acute respiratory distress syndrome (ARDS) is a clinical syndrome that is characterized by diffuse alveolar damage usually secondary to an intense host inflammatory response of the lung to a pulmonary or extrapulmonary infectious or noninfectious insult. In this report we describe a unique animal model in which CBA/J ...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1006/exmp.2001.2414

    authors: London L,Majeski EI,Paintlia MK,Harley RA,London SD

    更新日期:2002-02-01 00:00:00

  • Inhibition of Wnt/β-catenin signaling suppresses bleomycin-induced pulmonary fibrosis by attenuating the expression of TGF-β1 and FGF-2.

    abstract::Pulmonary fibrosis is a progressive lung disorder of unknown etiology, which is characterized by alterations in alveolar epithelium function, fibroblast activation, and increased extracellular matrix deposition. Recent studies have demonstrated that PF is associated with uncontrolled production of cytokines after lung...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2016.04.003

    authors: Chen X,Shi C,Meng X,Zhang K,Li X,Wang C,Xiang Z,Hu K,Han X

    更新日期:2016-08-01 00:00:00

  • Histopathological effects of homocysteine thiolactone on epithelial and stromal tissues.

    abstract::To study the effects of homocysteine on epithelial and stromal tissues, the free base of homocysteine thiolactone was synthesized and administered to mice. Intraperitoneal and intramuscular doses of 0.2 to 2.0 mg/g are acutely toxic, causing as much as 90% mortality because of intense tissue necrosis at the injection ...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(89)90016-6

    authors: McCully KS,Vezeridis MP

    更新日期:1989-10-01 00:00:00

  • Experimental pulmonary fibrosis induced by paraquat plus oxygen in rats: a morphologic and biochemical sequential study.

    abstract::Changes in lung structure and collagen metabolism were studied at 1, 2, 3, 4, 6, and 8 weeks in a model of pulmonary fibrosis induced in rats with paraquat plus hyperoxia. Morphologic examination of the lungs revealed that the earliest lesions consisted of severe and irreversible endothelial and alveolar epithelial ce...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(89)90027-0

    authors: Selman M,Montaño M,Ramos C,Barrios R,Pérez-Tamayo R

    更新日期:1989-04-01 00:00:00

  • Downregulation of MicroRNA-494 inhibits the TGF-β1/Smads signaling pathway and prevents the development of hypospadias through upregulating Nedd4L.

    abstract:BACKGROUND:Hypospadias, as a congenital disorder of the urethra, is the second most common birth abnormality of the male reproductive system. This study primarily investigates the effects of microRNA-494 (miR-494) on the transforming growth factor-β1 (TGF-β1)/Smads signaling pathway and on the development of hypospadia...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2020.104452

    authors: Tian RH,Guo KM,Han GH,Bai Y

    更新日期:2020-08-01 00:00:00

  • A BALB/c mouse model shows that liver involvement in dengue disease is immune-mediated.

    abstract::In the present study, BALB/c mice were used to develop a model for the hepatic injury associated to dengue infection. Histological analysis after subcutaneous inoculation with a low viral dose of dengue-2 virus showed Kupffer cell hyperplasia and an increased inflammatory cellular infiltrate next to the bile ducts on ...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2010.07.007

    authors: França RF,Zucoloto S,da Fonseca BA

    更新日期:2010-12-01 00:00:00

  • Dexmedetomidine reduces the inflammation and apoptosis of doxorubicin-induced myocardial cells.

    abstract::As the number of elderly patients increases, some patients with heart problems may also need surgery. The purpose of this study was to investigate whether dexmedetomidine (DEX), a common used anesthetic, was beneficial to the patients with heart problems. Myocardial cells induced by doxorubicin (DOX) was to simulate t...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2020.104371

    authors: He Y,Yang Z,Li J,Li E

    更新日期:2020-04-01 00:00:00

  • Adhesion molecules as susceptibility factors in spontaneous autoimmune thyroiditis in the NOD-H2h4 mouse.

    abstract::Mononuclear cell infiltration of the thyroid is a prominent feature of chronic lymphocytic thyroiditis. Adhesion molecules play a major role in determining the localization of inflammatory mononuclear cells in the thyroid. Previous reports from animal models and human studies have described the thyroidal expression of...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1006/exmp.2002.2470

    authors: Bonita RE,Rose NR,Rasooly L,Caturegli P,Burek CL

    更新日期:2002-12-01 00:00:00

  • Direct inhibitory effect of uremic toxins and polyamines on proliferation of VERO culture cells.

    abstract::The dialysate fluid of uremic patients exhibits, in vitro, an inhibitory effect on cell growth, owing to urea, guanidino compounds, and substances named middle molecules. The polyamines are compounds which exhibit high levels in biological fluids during either normal development or disease such as psoriasis, uremia, a...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1006/exmp.1997.2215

    authors: Stabellini G,Mariani G,Pezzetti F,Calastrini C

    更新日期:1997-01-01 00:00:00

  • Effect of carvedilol against myocardial injury due to ischemia-reperfusion of the brain in rats.

    abstract::We have previously reported the mechanism behind the myocardial injury and the activation of autonomic nervous system during the ischemia-reperfusion (IR) of the rat brain. This study was planned to investigate the effect of carvedilol, a β-blocker, in improving the myocardial injury caused by IR of the rat brain. We ...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2015.04.001

    authors: Harima M,Arumugam S,Wen J,Pitchaimani V,Karuppagounder V,Afrin MR,Sreedhar R,Miyashita S,Nomoto M,Ueno K,Nakamura M,Watanabe K

    更新日期:2015-06-01 00:00:00

  • Mechanisms by which acute phase proteins enhance development of liver fibrosis: effects on collagenase and prolyl-4-hydroxylase activity in the rat liver.

    abstract::Previous experiments showed that the presence of high levels of acute phase reactants (APR) enhance CCl4-induced liver fibrosis in the rat. A high correlation was found between the degree of fibrosis and alpha 2-macroglobulin of the rat (alpha 2-macrofetoprotein, alpha M-FP) used for monitoring the acute phase respons...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(86)90056-0

    authors: van Gool J,de Nie I,Smit J,Zuyderhoudt FM

    更新日期:1986-10-01 00:00:00

  • Extracellular and cell-associated localizations of plasminogen activators and plasminogen activator inhibitor-1 in cultured endothelium.

    abstract::The extracellular localizations of urokinase-type plasminogen activator (uPA), tissue-type plasminogen activator (tPA), and plasminogen activator inhibitor-1 (PAI-1) were examined in cultured bovine capillary endothelial cells (BCEs) by an immunofluorescence method using BCEs treated with or without saponin and focal ...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(91)90046-z

    authors: Murata T,Nakashima Y,Yasunaga C,Maeda K,Sueishi K

    更新日期:1991-10-01 00:00:00

  • Protective effect of ischemic preconditioning on the jejunal graft mucosa injury during cold preservation.

    abstract::Protection of intestinal graft mucosa during cold preservation is still an unmet need in clinical practice, thus affecting the success of transplantation. The present study investigates the ability of two ischemic preconditioning (IPC) procedures to limit cold preservation injury. Three groups of Sprague-Dawley rats w...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2015.06.020

    authors: Jonecova Z,Toth S,Maretta M,Ciccocioppo R,Varga J,Rodrigo L,Kruzliak P

    更新日期:2015-10-01 00:00:00

  • Periostin in intrahepatic cholangiocarcinoma: pathobiological insights and clinical implications.

    abstract::Periostin is a modular glycoprotein frequently observed to be a major constituent of the extracellular milieu of mass-forming intrahepatic cholangiocarcinoma and other desmoplastic malignant tumors. In intrahepatic cholangiocarcinoma, as well as in desmoplastic pancreatic ductal adenocarcinoma, periostin is overexpres...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章,评审

    doi:10.1016/j.yexmp.2014.10.007

    authors: Sirica AE,Almenara JA,Li C

    更新日期:2014-12-01 00:00:00

  • Early gene expression differences in inbred mouse strains with susceptibility to pulmonary adenomas.

    abstract::Lung cancer is the most common cause of cancer-related deaths in both men and women, and effective preventatives are rare due to the difficulty of early detection. Specific gene expression signatures have been identified in individuals that already developed lung cancer. To identify if gene expression differences coul...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2012.09.015

    authors: Stearns TM,Cario CL,Savage HS,Sundberg JP,Paigen B,Berndt A

    更新日期:2012-12-01 00:00:00

  • Analysis of point mutations and copy number variation in Grade II and III meningioma.

    abstract::Meningiomas are among the most common tumors of the adult central nervous system (CNS). They are classified by the World Health Organization into three pathologic grades with increasing severity: grade I are benign with favorable treatment outcomes and low recurrence rates while grade III display malignant behavior an...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2018.10.007

    authors: McNulty SN,Schwetye K,Goldstein M,Carter J,Schmidt RE,Ansstas G,Tsien CI,Kim AH,Dahiya S

    更新日期:2018-12-01 00:00:00

  • Effect of acute plasma fibronectin depletion on tissue fibronectin levels: analysis by a new fluorescent immunoassay.

    abstract::Plasma fibronectin modulates reticuloendothelial (RE) phagocytosis of cellular and tissue debris, fibrin microaggregates, and gelatin-coated particulates. An antigenically related, but more insoluble form of fibronectin is found in various tissues and suspected to play a role in vascular permeability, cell adhesion, a...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(84)90010-8

    authors: Saba TM,Cho E,Blumenstock FA

    更新日期:1984-08-01 00:00:00

  • Prevalence of MTHFR gene polymorphisms (C677T and A1298C) among Tamilians.

    abstract::We have investigated the incidence of the C677T and A1298C methylene tetrahydrofolate reductase (MTHFR) gene single nucleotide polymorphisms (SNPs) in the South Indian Tamil Nadu population with a total number of 72 individuals. The MTHFR genotyping was performed using the polymerase chain reaction followed by restric...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2004.04.006

    authors: Angeline T,Jeyaraj N,Granito S,Tsongalis GJ

    更新日期:2004-10-01 00:00:00

  • Intercellular adhesion molecule-1 expression in experimental alcoholic liver disease: relationship to endotoxemia and TNF alpha messenger RNA.

    abstract::We used the intragastric feeding rat model for alcoholic liver disease to evaluate the relationship among intercellular adhesion molecule-1 (ICAM-1) expression, tumor necrosis factor-alpha (TNF-alpha), plasma endotoxin, and inflammatory changes in the liver. Rats were fed different dietary fats (saturated fat, corn oi...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1006/exmp.1995.1005

    authors: Nanji AA,Griniuviene B,Yacoub LK,Fogt F,Tahan SR

    更新日期:1995-02-01 00:00:00

  • Fibroblast activation protein-α promotes ovarian cancer cell proliferation and invasion via extracellular and intracellular signaling mechanisms.

    abstract::Fibroblast activation protein-α (FAPα) is secreted by activated stromal fibroblasts and can promote ovarian cancer cell proliferation, migration and invasion. However, the molecular mechanism by which FAPα promotes tumor cell proliferation and invasion is unknown. The role of the non-enzymatic activities of FAPα in tu...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2013.06.007

    authors: Yang W,Han W,Ye S,Liu D,Wu J,Liu H,Li C,Chen H

    更新日期:2013-08-01 00:00:00

  • Copper toxicosis and tolerance in the rat. III. Intracellular localization of copper in the liver and kidney.

    abstract::Male rats fed a 3 g/kg copper diet were killed sequentially up to 14 weeks. Copper in liver and kidney cortex was identified histochemically and assayed in homogenates and gradient fractions following analytical subcellular fractionation on reorientating sucrose density gradients. Copper accumulated fastest in the liv...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(85)90041-3

    authors: Haywood S,Loughran M,Batt RM

    更新日期:1985-10-01 00:00:00

  • Low-density lipoprotein endocytosis. II. Influence of the multivalent ligand cationized ferritin on acetylated low-density lipoprotein endocytosis in cultured cells.

    abstract::Interactions of the basic multivalent ligand cationized ferritin (CF) with cultured cells markedly alter their endocytic function. In this study, the influence of CF treatment on the binding, internalization, and degradation of chemically modified (acetylated) low-density lipoproteins (Ac-LDL) was examined in aortic s...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(88)90072-x

    authors: Sprague EA,Edwards EH,Valente AJ,Suenram CA,Kerbacher JJ,Schwartz CJ

    更新日期:1988-06-01 00:00:00

  • X-ray microanalysis of the rat parotid gland after chronic sympathectomimetic stimulation.

    abstract::The effects of chronic treatment with isoproterenol, reserpine, prenalterol, and terbutaline on rat parotid gland were investigated by electron microscopy and X-ray microanalysis. Chronic isoproterenol treatment induced lower potassium and calcium concentrations in the acinar cells. The cells were enlarged and contain...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/0014-4800(84)90024-8

    authors: Müller RM,Roomans GM

    更新日期:1984-12-01 00:00:00

  • Spontaneous diabetes in BB Wistar rats causes small increases in the early proliferative response of smooth muscle cells in re-injured aortae.

    abstract::Diabetic patients are at greater risk for restenosis following angioplasty, but the mechanisms involved remain unclear. Early proliferative changes in vessels following angioplasty contribute to the subsequent intimal thickening associated with restenosis. Materials released from platelets which interact with the inju...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1006/exmp.1995.1040

    authors: Winocour PD,Hryhorenko L

    更新日期:1995-12-01 00:00:00

  • Comparative expression of immunohistochemical biomarkers in cribriform and pattern 4 non-cribriform prostatic adenocarcinoma.

    abstract::The morphology of Gleason 4 prostate cancer (PCa) can be subdivided into cribriform and non-cribriform patterns. A large body of evidence has shown that pattern 4 cribriform PCa (especially non-glomeruloid type) is associated with adverse pathologic features and clinical outcomes compared with non-cribriform pattern 4...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2020.104400

    authors: Xiao GQ,Nguyen E,Unger PD,Sherrod AE

    更新日期:2020-06-01 00:00:00

  • Northwestern profiling of potential translation-regulatory proteins in human breast epithelial cells and malignant breast tissues: evidence for pathological activation of the IGF1R IRES.

    abstract::Genes involved in the control of cell proliferation and survival (those genes most important to cancer pathogenesis) are often specifically regulated at the translational level, through RNA-protein interactions involving the 5'-untranslated region of the mRNA. IGF1R is a proto-oncogene strongly implicated in human bre...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2010.03.006

    authors: Blume SW,Jackson NL,Frost AR,Grizzle WE,Shcherbakov OD,Choi H,Meng Z

    更新日期:2010-06-01 00:00:00

  • Distribution of paraoxonase PON1 gene polymorphisms in Mexican populations. Its role in the lipid profile.

    abstract::Paraoxonase gene polymorphisms (PON1-55 and PON1-192) were determined in four Mexican populations (Mestizos, Nahuas, Teenek and Mayos) belonging to different ethnic groups. The role of these polymorphisms in the lipid profile in the Mestizo group was also analyzed. PON1 polymorphisms were determined by polymerase chai...

    journal_title:Experimental and molecular pathology

    pub_type: 杂志文章

    doi:10.1016/j.yexmp.2005.05.006

    authors: Gamboa R,Zamora J,Rodríguez-Pérez JM,Fragoso JM,Cardoso G,Posadas-Romero C,Vargas-Alarcón G

    更新日期:2006-02-01 00:00:00