Abstract:
:Late diagnosis of pancreatic ductal adenocarcinoma (PDA) is one of the reasons of its low 5-year survival rate and it is due to its unspecific symptoms during the first stages of the disease and the lack of reliable serological markers. Since PDA shows an altered glycan expression, here we have focused on finding novel potential biomarkers, namely glycoproteins that express the tumor associated carbohydrate structure sialyl-Lewis x (sLex), which is described in PDA. Through a glycoproteomic approach, we have analyzed target proteins containing sLex from PDA tissues by 2DE and immunodetection techniques, and have identified by mass spectrometry the protein MFAP4 as a carrier of sLex in PDA. MFAP4 showed a higher expression in PDA tissues compared with pancreatic control tissues. In addition, the colocalization of sLex over MFAP4 was found only in PDA and not in control pancreatic tissues. The analysis of MFAP4 expression in PDA cell lines and their secretome, in combination with immunohistochemistry of pancreatic tissues, revealed that MFAP4 was not produced by PDA cells, but it was found in the pancreatic extracellular matrix. The specificity of MFAP4 glycoform containing sLex in PDA tissues shows its relevance as a potential PDA biomarker. SIGNIFICANCE: Despite advances in the field of cancer research, pancreatic ductal adenocarcinoma (PDA) lacks of a specific and sensitive biomarker for its early detection, when curative resection is still possible before metastases arise. Thus, efforts to discover new PDA biomarkers represent the first line in the fight against the increase of its incidence reported in recent years. Glycan alterations on glycoconjugates, such as glycoproteins have emerged as a rich source for the identification of novel cancer markers. In the present work, we aimed to shed light on novel biomarkers based on altered glycosylation in PDA, in particular those glycoproteins of PDA tissues carrying the tumor carbohydrate antigen sialyl-Lewis x (sLex). Through a glycoproteomic approach, we have shown that the glycoprotein MFAP4 carries sLex in PDA tissues and not in control pancreatic tissues. MFAP4 is found in the extracellular matrix in PDA and although its role in cancer progression is unclear, its sLex glycoform could be a potential biomarker in pancreatic ductal adenocarcinoma.
journal_name
J Proteomicsjournal_title
Journal of proteomicsauthors
Guerrero PE,Duran A,Ortiz MR,Castro E,Garcia-Velasco A,Llop E,Peracaula Rdoi
10.1016/j.jprot.2020.104004subject
Has Abstractpub_date
2021-01-16 00:00:00pages
104004eissn
1874-3919issn
1876-7737pii
S1874-3919(20)30372-9journal_volume
231pub_type
杂志文章abstract::"Secretome" is referred to as the rich, complex set of molecules secreted from living cells. In a less strict definition frequently followed in "secretome" studies, the term also includes molecules shed from the surface of living cells. Proteins of secretome (will be referred to as secreted) play a key role in cell si...
journal_title:Journal of proteomics
pub_type: 杂志文章,评审
doi:10.1016/j.jprot.2010.07.001
更新日期:2010-11-10 00:00:00
abstract::Dufour's gland is associated with the venom apparatuses of social wasps and bees. This location and its evolutionary adaptations indicate that it could be involved in the production of alarm pheromones in the social wasp Polybia paulista. To investigate this hypothesis, the volatile composition of this gland was analy...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2016.01.009
更新日期:2017-01-16 00:00:00
abstract::No effective screening method is available for oral squamous cell carcinoma (OSCC) that is recognized to influence by environmental factors as well as human papillomavirus (HPV) and Epstein-Barr virus (EBV). Therefore, we sought to identify salivary biomarkers for screening of OSCC with or without HPV and/or EBV infec...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2017.11.022
更新日期:2018-02-20 00:00:00
abstract::Characterization of the biomolecules involved in molecular processes occurring in biological systems such as the human cell remains central to biology, biotechnology, and medicine. One of the preferred methods of selectively purifying specific classes of biomolecules from complex biological matrices for further charac...
journal_title:Journal of proteomics
pub_type: 杂志文章,评审
doi:10.1016/j.jprot.2011.07.024
更新日期:2011-12-21 00:00:00
abstract::The human papillomavirus type 16 (HPV-16) E6/E7 spliced transcripts are heterogeneously expressed in cervical carcinoma. The heterogeneity of the E6/E7 splicing profile might be in part due to the intrinsic variation of splicing factors in tumor cells. However, the splicing factors that bind the E6/E7 intron 1 (In-1) ...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2014.07.029
更新日期:2014-12-05 00:00:00
abstract::Plasma membrane intrinsic proteins (PIPs) are one subfamily of aquaporins that mediate the transmembrane transport of water. To reveal their function in poplar, we generated transgenic poplar plants in which the translation of PIP genes was downregulated by RNA interference investigated these plants with a comprehensi...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2015.07.029
更新日期:2015-10-14 00:00:00
abstract::Solanaceae is one of the major economically important families of higher plants and has played a central role in human nutrition since the dawn of human civilization. Therefore, researchers have always been interested in understanding the complex behavior of Solanaceae members to identify key transcripts, proteins or ...
journal_title:Journal of proteomics
pub_type: 杂志文章,评审
doi:10.1016/j.jprot.2017.05.016
更新日期:2017-10-03 00:00:00
abstract::One of the main concerns about genetically modified foods and their potential impacts on human health is that the introduction of a new/ altered gene may putatively alter the expression of others, namely endogenous allergens. We intended to evaluate, and to compare, using quantitative real time RT-PCR technique, the e...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2012.01.005
更新日期:2012-04-03 00:00:00
abstract::Proteins can become oxidatively modified in many different ways, either by direct oxidation of amino acid side chains and protein backbone or indirectly by conjugation with oxidation products of polyunsaturated fatty acids and carbohydrates. While reversible oxidative modifications are thought to be relevant in physio...
journal_title:Journal of proteomics
pub_type: 杂志文章,评审
doi:10.1016/j.jprot.2011.05.004
更新日期:2011-10-19 00:00:00
abstract::Chloroplast, the energy organelle unique to plant cells, is a dynamic entity which integrates an array of metabolic pathways and serves as first level for energy conversion for the entire ecological hierarchy. Increasing amount of sequence data and evolution of mass spectrometric approaches has opened up new avenues f...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2017.06.005
更新日期:2017-08-08 00:00:00
abstract::Meat tenderness prediction is a challenging task, especially in Maremmana, an Italian autochtonous and highly appreciated beef breed. In the present study we reported an integrated proteomics, phosphoproteomics and metabolomics overview of meat tenderness in longissimus dorsi from 15 male Maremmana individuals, throug...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2012.02.013
更新日期:2012-07-19 00:00:00
abstract:UNLABELLED:Saccharomyces cerevisiae is considered a safe microorganism widely used as a dietary supplement. However, in the latest decades several cases of S. cerevisiae infections have been reported. Recent studies in a murine model of systemic infection have also revealed the virulence of some S. cerevisiae dietary s...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2014.08.008
更新日期:2015-01-01 00:00:00
abstract::The proteins secreted by prostate cancer cells (PC3(AR)6) were separated by strong anion exchange chromatography, digested with trypsin and analyzed by unbiased liquid chromatography tandem mass spectrometry with an ion trap. The spectra were matched to peptides within proteins using a goodness of fit algorithm that s...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2011.11.002
更新日期:2012-02-02 00:00:00
abstract::Plans for the European Proteomics Association (EuPA) were conceived and established during 2004 and 2005, and culminated in the formal inception of the organisation during the 4th HUPO World Congress held in Munich in 2005. The mission from the outset has been three-tiered and is to: i) strengthen the national Proteom...
journal_title:Journal of proteomics
pub_type: 历史文章,杂志文章
doi:10.1016/j.jprot.2008.03.004
更新日期:2008-04-30 00:00:00
abstract:UNLABELLED:ERLIC and high-pH RP (Hp-RP) have been reported to be promising alternatives to strong cation exchange (SCX) in proteome fractionation. Here we compared the performance of ERLIC, concatenated ERLIC and concatenated Hp-RP in proteome profiling. The protein identification is comparable in these three strategie...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2013.02.008
更新日期:2013-04-26 00:00:00
abstract:UNLABELLED:The exoproteome of Leishmania infantum is composed of parasite derived proteins present in the extracellular environment. Although the exoproteome might have a significant role in the precocious steps of infection little is known concerning its composition. We developed an approach enabling the in vitro reco...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2013.03.012
更新日期:2013-06-12 00:00:00
abstract:UNLABELLED:Schistosomiasis remains one of the major neglected tropical diseases (NTDs) causing morbidity of humans residing in the tropical countries. Much effort has been devoted to the development of vaccines, since it is recognized that vaccines can be served as an important supplementary component alongside chemoth...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2014.01.010
更新日期:2014-02-26 00:00:00
abstract:UNLABELLED:The scorpion family Chaerilidae is phylogenetically differentiated from Buthidae. Their venom components are not known, and the evolution of the venom components is not well understood. Here, we performed a transcriptome analysis of the venom glands from two scorpion species, Chaerilus tricostatus and Chaeri...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2013.06.007
更新日期:2013-08-26 00:00:00
abstract::Due to innovative advancements in quantitative MS technologies, proteomics has evolved from taking mere "snapshots" of distinct proteomes in a defined state to monitoring, for instance, changes in abundance, location and/or posttranslational modification(s) of proteins under various conditions, thereby facilitating th...
journal_title:Journal of proteomics
pub_type: 杂志文章,评审
doi:10.1016/j.jprot.2008.11.008
更新日期:2009-04-13 00:00:00
abstract:UNLABELLED:Hg discharged into the environmental waters can generally be bioaccumulated, transformed and transmited by living organisms, thus resulting in the formation of Hg-toxicity food chains. The pathway and toxicology of food chain contaminated with environmental Hg are rarely revealed by proteomics. Here, we show...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2013.08.018
更新日期:2013-12-06 00:00:00
abstract::Termite soldiers constitute the defensive frontline of the colonies, despite workers also perform such tasks, especially within the Neotropical Apicotermitinae, in which all species are soldierless. Workers of the genus Ruptitermes display an extreme form of defense, characterized by body rupture and release of a stic...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2019.103622
更新日期:2020-02-20 00:00:00
abstract::Quantitative proteomic comparisons require a sufficient number of samples to reach an acceptable level of significance. But 2D gel electrophoresis commonly results in incomplete data sets due to spots with missing values reducing thereby the number of parallel measurements for individual proteins. Here we investigated...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2011.12.019
更新日期:2012-03-16 00:00:00
abstract:UNLABELLED:The pathogenicity of Yersinia enterocolitica biovar 1A strains is controversial as these lack most of the known virulence factors. Acquisition of iron and presence of well-regulated iron homeostasis in bacteria represents an important virulence trait. Differential abundance of proteins was examined under iro...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2015.04.015
更新日期:2015-06-21 00:00:00
abstract::Populations of small eukaryotic RNAs, in addition to relatively well recognized molecules such as miRNAs or siRNAs, also contain fragments derived from all classes of constitutively expressed non-coding RNAs. It has been recently demonstrated that the formation and accumulation of RNA fragments (RFs) is cell-/tissue-s...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2018.10.007
更新日期:2019-02-20 00:00:00
abstract:UNLABELLED:Breast cancer is the principal cancer in women worldwide. Although there are serum tumor markers such as CEA and HER2, they are detected in advanced stages of the disease and used as progression and recurrence markers. Therefore, there is a necessity for the identification of new markers that might lead to a...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2015.04.018
更新日期:2015-06-21 00:00:00
abstract:UNLABELLED:Despite the noxious effects inflicted by Dinoponera ant's envenomation, the information about the biological properties and composition of their venom is still very limited. Ants from the genus Dinoponera are believed to be the world's largest living ants with a body length of 3cm. Their occurrence is restri...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2013.10.017
更新日期:2013-12-06 00:00:00
abstract::Ubiquitylation is an elaborate post-translational modification involved in all biological processes. Its pleotropic effect is driven by the ability to form complex polyubiquitin chain architectures that can influence biological functions. In this study, we optimised sample preparation and chromatographic separation of...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2020.103963
更新日期:2020-10-30 00:00:00
abstract:UNLABELLED:We present a combined proteomic and bioinformatic investigation of mitochondrial proteins from the amoeboid protist Acanthamoeba castellanii, the first such comprehensive investigation in a free-living member of the supergroup Amoebozoa. This protist was chosen both for its phylogenetic position (as a sister...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2014.07.005
更新日期:2014-09-23 00:00:00
abstract::Dystrobrevin is a dystrophin-related component of the dystrophin-associated protein complex (DAPC). Using alpha-dystrobrevin as indicator, we aimed to elucidate the interaction network of the DAPC with other proteins during apoptosis of promyelocytic HL-60 cells. The precise role(s) of DBs are not known, but we and ot...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2012.03.041
更新日期:2012-06-18 00:00:00
abstract:UNLABELLED:Extracellular vesicles are produced by many pathogenic microorganisms and have varied functions that include secretion and release of microbial factors, which contribute to virulence. Very little is known about vesicle production by Gram-positive bacteria, as well as their biogenesis and release mechanisms. ...
journal_title:Journal of proteomics
pub_type: 杂志文章
doi:10.1016/j.jprot.2014.04.023
更新日期:2014-06-25 00:00:00