Linked Life Data

21346236

Source:http://linkedlifedata.com/resource/pubmed/id/21346236

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2011-3-22
pubmed:abstractText
Aberrant glycosylation or overexpression of cell-surface glycosylated tumor-associated Ags (TAA) distinguish neoplastic from normal cells. Interactions of TAA MUC1 and HER2/neu with dendritic cells (DC) preclude efficient processing, which impairs immune responses. It is thus important to define the mechanisms of interactions between DC and glycosylated TAA and their trafficking and processing for further T cell activation. In this work, we study interactions between DC and the oncofetal fucose-rich glycovariants of bile salt-dependent lipase (BSDL), expressed in pancreatic cancer tissues and referred to as pathological BSDL carrying the fucosylated J28 glycotope (pBSDL-J28) because it is characterized by the mAb J28. The expression of pBSDL-J28 was assessed by immunohistochemistry and quantified by confocal microscopy. Nontumoral pancreatic tissues and cells do not express pBSDL-J28. Using multidisciplinary approaches and functional studies, we provide the first evidence, to our knowledge, that this tumoral glycoprotein is rapidly internalized by human DC through macropinocytosis and endocytosis via mannose receptors and then transported to late endosomes for processing. Interestingly, pBSDL-J28 per se induced DC maturation with increased expression of costimulatory and CD83 molecules associated with cytokine secretion (IL-8 and IL-6). Surprisingly, DC retained their full ability to internalize Ags, making this maturation atypical. Finally, the allogeneic pBSDL-J28-treated DC stimulated lymphocyte proliferation. Besides, pulsing DC with pBSDL-J28 C-terminal glycopolypeptide and maturation with CD40L triggered CD4(+) and CD8(+) T cell proliferation. Therefore, interactions of pBSDL-J28, expressed on tumoral pancreatic tissue, with DC may lead to adequate Ag trafficking and processing and result in T cell activation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1550-6606
pubmed:author
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
186
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
4067-77
pubmed:meshHeading
pubmed-meshheading:21346236-Antigen Presentation, pubmed-meshheading:21346236-Antigens, Neoplasm, pubmed-meshheading:21346236-Cell Differentiation, pubmed-meshheading:21346236-Coculture Techniques, pubmed-meshheading:21346236-Dendritic Cells, pubmed-meshheading:21346236-Endocytosis, pubmed-meshheading:21346236-HEK293 Cells, pubmed-meshheading:21346236-Humans, pubmed-meshheading:21346236-Lectins, C-Type, pubmed-meshheading:21346236-Lymphocyte Activation, pubmed-meshheading:21346236-Mannose-Binding Lectins, pubmed-meshheading:21346236-Pancreatic Neoplasms, pubmed-meshheading:21346236-Protein Transport, pubmed-meshheading:21346236-Receptors, Cell Surface, pubmed-meshheading:21346236-Sterol Esterase, pubmed-meshheading:21346236-T-Lymphocytes, pubmed-meshheading:21346236-Tumor Markers, Biological
pubmed:year
2011
pubmed:articleTitle
A novel tumor-associated pancreatic glycoprotein is internalized by human dendritic cells and induces their maturation.
pubmed:affiliation
INSERM Unité Mixte de Recherche 911, Centre de Recherche en Oncologie Biologique et Oncopharmacologie, F-13005 Marseille, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't