Review Article

Proteomics of Uveal Melanoma: A Minireview

Table 4

Histopathologic proteomic markers in metastatic UM (explanations below).

NameAuthorsResultsFunctionNumberMethodYear

S-100Luyten et al. [31]Present in 66% of UM metastasis Cytoskeletal29 UM and metastasisIC1996

HMB-45Luyten et al. [31](1) Present in 91% of UM metastasis. (2) Significantly more sensitive than S-100 ( = 0,04) Unknown29 UM and metastasisIC1996

NKI-C3 Luyten et al. [31]Present in 71% of UM metastasis Unknown29 UM and metastasisIC1996

MIASchaller et al. [50]4 out of 5 primary UM (80%) and 6 out of 8 metastasis (80%) were found positive for MIA; in the last two metastasis detection was not possible Cell-matrix adhesion inhibitor5 FFPE UM, 8 FFPE metastasisIC2002

NSB1 Ehlers and Harbour [51]High expression was significantly correlated to a low survival rate (22% versus 100% = 0,01)DNA damage repair49 UM, 4 deathsGen. + IC2005

c-MetMallikarjuna et al. [52]High expression related to liver metastasis ( = 0,0009), speculation is that it is ligand independent as HGF was not elevatedHepatocyte growth factor (HGF) receptor involved in HGF’s stimulation of tumor cells60 UM, 6 metastasisIC 2007

VEGF-A and MMP-9Sahin et al. [53]Not present in normal ocular tissues. Significantly elevated in lymphocytic infiltration, necrosis, EMP (loop and/or network) formation. VEGF was significantly elevated in metastasis ( = 0,02); MMP-9 was almost significantly elevated ( = 0,052). Metastasis not correlated to cell type, tumor seize, mitotic rate, degree of pigmentation, necrosis, and EMPsVEGF-A = most important proangiogenic factor MMP-9 = metalloproteinase, Zn binding, key role in angiogenesis100 UM, metastasis 14, deaths 2IC2007

E-cadherin + VE-cadherin + Hif1αChang et al. [54]Significantly associated with class 2 tumor type (a significant predictor of metastasis = 0,0001) and epithelioid cell type ( < 0,001)Not described in the paper29 class 1 tumors and 28 class 2 tumorsIC2008

MCAM
(=MUC18/Mel-Cam/CD146)Φ
Beutel et al. [39]Increased in primary tumor with metastasis compared to nonmetastatic tumor (from 32,5% to 81,8%, = 0,0001)Adhesion molecule expressed on vascular endothelium, believed to be involved in tumor migration through the endothelium and vascularization35 UM, 16 metastasisIC2009

HSP-27Coupland et al. [40]Decreased in densitometry with monosomy 3 (10,51–6,67 ODxArea = 0,005)Chaperone involved in heat and stress protection41 FFPE UM, 20 monosomy 3 MS IC WB2010

VimentinCoupland et al. [40]Increased in densitometry with monosomy 3 (5,82–12,20 ODxArea = 0,003)Cytoskeletal component 41 FFPE UM, 20 monosomy 3 MS IC WB2010

SCFΦ Lüke et al. [41]Decreased in expression in primary tumors with systemic metastasis (from 77,2% to 30,1%, < 0,0001)Ligand to the c-Kit receptor tyrosine kinase has a crucial role during defined stages of the development of mature melanocytes35 UM, 16 metastasisIC2011

c-KitΦ Lüke et al. [41]No significant correlation with systemic metastasisReceptor tyrosine kinase has a crucial role during defined stages of the development of mature melanocytes35 UM, 16 metastasisIC2011

LZTS1 + β-cateninSimões et al. [55]When combined β-catenin negative plus any LZTS1 expression was significantly related to metastatic deathLZTS1 = tumor suppressor β-catenin = possibly a role in promoting tumorigenesis82 FFPE UM, 27 dead of metastasisIC2011

MS: mass spectrometry, IHC: Immunohistochemistry, WB: western blotting, Mono.: monosomy, Φ: prognostic marker, MIA: melanoma inhibitory activity, NSB1: Nijmegen breakage syndrome 1, MCAM: melanoma cell adhesion molecule, HSP-27: heat shock protein 27, SCF: stem cell factor, LZTS1: leucine-zipper tumor suppressor 1, VEGF-A: vascular endothelial growth factor, MMP-9: matrix metalloproteinase 9, VE: vascular endothelial, Hif1α: hypoxia-inducible factor 1 α.