title: Cytoplasmic LRIG2 expression is associated with poor oligodendroglioma patient survival.
abstract: The three leucine-rich repeats and immunoglobulin-like domains (LRIG) genes encode integral membrane proteins. Of these, LRIG1 negatively regulates growth factor signaling and is implicated as a tumor suppressor in certain malignancies. In astrocytic tumors, the subcellular distribution of LRIG proteins is associated with specific clinicopathological features and patient survival. The role of LRIG proteins in oligodendroglioma has not previously been studied. Here we used immunohistochemistry to analyze the expression of the LRIG proteins in 63 oligodendroglial tumors, and evaluated possible associations between LRIG protein expression and clinicopathological parameters. Notably, cytoplasmic LRIG2 expression was found to be an independent prognostic factor associated with poor oligodendroglioma patient survival. This is the first report of an LRIG protein showing a negative effect on survival, suggesting that LRIG2 might have a function different from that of LRIG1, and possibly contributing to the etiology of oligodendroglioma.
authors.affiliation: Departments of Radiation Sciences, Oncology, Umeå University, Sweden.
authors.forename: Camilla
authors.initials: C
authors.lastname: Holmlund
authors.forename: Hannu
authors.initials: H
authors.lastname: Haapasalo
authors.forename: Wei
authors.initials: W
authors.lastname: Yi
authors.forename: Olayinka
authors.initials: O
authors.lastname: Raheem
authors.forename: Thomas
authors.initials: T
authors.lastname: Brännström
authors.forename: Helena
authors.initials: H
authors.lastname: Bragge
authors.forename: Roger
authors.initials: R
authors.lastname: Henriksson
authors.forename: Håkan
authors.initials: H
authors.lastname: Hedman
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000175:diagnosis* / Q000378:metabolism* / Q000473:pathology; D002467:Cell Nucleus / Q000378:metabolism; D003593:Cytoplasm / Q000378:metabolism*; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008562:Membrane Glycoproteins / Q000378:metabolism*; D008565:Membrane Proteins / Q000378:metabolism; D008875:Middle Aged; D009367:Neoplasm Staging; D009837:Oligodendroglioma / Q000175:diagnosis* / Q000378:metabolism* / Q000473:pathology; D011379:Prognosis; D055815:Young Adult
chemical_list: C484445:LRIG1 protein, human; C488673:LRIG2 protein, human; C496406:LRIG3 protein, human; D008562:Membrane Glycoproteins; D008565:Membrane Proteins