scholarly journals Humoral Autoimmune Responses to Insulin-Like Growth Factor II mRNA-Binding Proteins IMP1 and p62/IMP2 in Ovarian Cancer

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Xinxin Liu ◽  
Hua Ye ◽  
Liuxia Li ◽  
Wenjie Li ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Growth Factor ◽  
Binding Proteins ◽  
Immunofluorescence Assay ◽  
Enzyme Linked Immunosorbent Assay ◽  
Insulin Like Growth Factor ◽  
Mrna Binding Proteins ◽  
Normal Individuals ◽  
Factor Ii ◽  
Mrna Binding

Ovarian cancer is one of the leading causes of cancer-related deaths among women. There is an urgent need of better approaches for the identification of appropriate biomarkers in the early detection of ovarian cancer. The aim of this study was to elucidate the significance of autoantibodies against insulin-like growth factor II mRNA-binding proteins (IMPs) in patients with ovarian cancer. In this study, autoantibody responses to two members (IMP1 and p62/IMP2) of IMPs were evaluated by enzyme-linked immunosorbent assay (ELISA), western blotting, and indirect immunofluorescence assay in sera from patients with ovarian cancer and normal human individuals. The results have demonstrated that both IMP1 and p62/IMP2 can induce relatively higher frequency of autoantibody responses in patients with ovarian cancer (26.5% and 29.4%) compared to normal individuals(P<0.01). Our preliminary data suggest that IMP1 and p62/IMP2 can stimulate autoimmune responses in ovarian cancer, and anti-IMP1 and anti-p62/IMP2 autoantibodies could be used as potential biomarkers in immunodiagnosis of ovarian cancer.

scholarly journals A Family of Insulin-Like Growth Factor II mRNA-Binding Proteins Represses Translation in Late Development

1999 ◽  
Vol 19 (2) ◽  
pp. 1262-1270 ◽  
Author(s):  
Jacob Nielsen ◽  
Jan Christiansen ◽  
Jens Lykke-Andersen ◽  
Anders H. Johnsen ◽  
Ulla M. Wewer ◽  
...  
Keyword(s):  
Growth Factor ◽  
Binding Proteins ◽  
Human Embryos ◽  
Insulin Like Growth Factor ◽  
Mammalian Development ◽  
Rna Recognition Motifs ◽  
Mrna Binding Proteins ◽  
Factor Ii ◽  
Recognition Motifs ◽  
Mrna Binding

ABSTRACT Insulin-like growth factor II (IGF-II) is a major fetal growth factor. The IGF-II gene generates multiple mRNAs with different 5′ untranslated regions (5′ UTRs) that are translated in a differential manner during development. We have identified a human family of three IGF-II mRNA-binding proteins (IMPs) that exhibit multiple attachments to the 5′ UTR from the translationally regulated IGF-II leader 3 mRNA but are unable to bind to the 5′ UTR from the constitutively translated IGF-II leader 4 mRNA. IMPs contain the unique combination of two RNA recognition motifs and four hnRNP K homology domains and are homologous to the Xenopus Vera and chicken zipcode-binding proteins. IMP localizes to subcytoplasmic domains in a growth-dependent and cell-specific manner and causes a dose-dependent translational repression of IGF-II leader 3 –luciferase mRNA. Mouse IMPs are produced in a burst at embryonic day 12.5 followed by a decline towards birth, and, similar to IGF-II, IMPs are especially expressed in developing epithelia, muscle, and placenta in both mouse and human embryos. The results imply that cytoplasmic 5′ UTR-binding proteins control IGF-II biosynthesis during late mammalian development.

scholarly journals Insulin-like growth factor 2 mRNA-binding proteins (IGF2BPs): post-transcriptional drivers of cancer progression?

2012 ◽  
Vol 70 (15) ◽  
pp. 2657-2675 ◽  
Author(s):  
Jessica L. Bell ◽  
Kristin Wächter ◽  
Britta Mühleck ◽  
Nikolaos Pazaitis ◽  
Marcel Köhn ◽  
...  
Keyword(s):  
Growth Factor ◽  
Cancer Progression ◽  
Binding Proteins ◽  
Insulin Like Growth Factor ◽  
Mrna Binding Proteins ◽  
Mrna Binding

Measurement of Human Igf-II Using Sephacryl Extraction: A Rapid and Reliable Assay Method

1996 ◽  
Vol 33 (3) ◽  
pp. 201-208 ◽  
Author(s):  
Barbara H Mason ◽  
Michele A Tatnell ◽  
Ian M Holdaway
Keyword(s):  
Growth Factor ◽  
Binding Proteins ◽  
Complete Removal ◽  
Assay Method ◽  
Insulin Like Growth Factor ◽  
Serum Concentrations ◽  
Igf Binding Proteins ◽  
Factor Ii ◽  
Igf I ◽  
Igfbp 3

Measurement of insulin-like growth factor II (IGF-II) in human serum is complicated by the presence of IGF binding proteins and usually involves cumbersome extraction procedures followed by radioimmunoassay. We have utilized an extraction process developed for measuring insulin-like growth factor II in ovine serum using Sephacryl HR100, and have applied this to the extraction of human samples followed by radioimmunoassay for human IGF-II. The assay yielded 98% recovery of unlabelled IGF-II, parallelism between dilutions of eluate and the standard curve, complete removal of binding proteins and near-complete removal of IGF-I, and intra- and interassay coefficients of variation of 5% and 9%, respectively. The normal range for serum IGF-II in women was 490–1056 μg/L, and IGF-II levels were positively correlated with serum concentrations of insulin-like growth factor binding protein-3 (IGFBP-3) but not with IGF-I levels. Mean serum concentrations of IGF-II were reduced below normal in a number of hypopituitary patients and children with short stature and IGF-II concentrations in these subjects correlated positively with IGF-I and IGFBP-3. In acromegalic patients IGF-II levels were usually normal and were negatively correlated with IGF-I concentrations. From our experience with the above results the present assay appears particularly suitable for clinical measurements and research projects where high sample throughput is required.

scholarly journals Insulin-like Growth Factor Binding Proteins IGFBP3, IGFBP4, and IGFBP5 Predict Endocrine Responsiveness in Patients with Ovarian Cancer

2007 ◽  
Vol 13 (5) ◽  
pp. 1438-1444 ◽  
Author(s):  
Graeme Walker ◽  
Kenneth MacLeod ◽  
Alistair R.W. Williams ◽  
David A. Cameron ◽  
John F. Smyth ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Growth Factor ◽  
Binding Proteins ◽  
Insulin Like Growth Factor ◽  
Factor Binding

The roles of Insulin-like growth factor-II messenger RNA (mRNA)-binding protein-3 (IMP-3) in melanoma progression

2013 ◽  
Vol 69 (2) ◽  
pp. e20-e21
Author(s):  
Chia-Yu Chu ◽  
Yi-Shuan Sheen ◽  
Kuanyin K. Lin ◽  
Meng-Chen Hsieh ◽  
Hsien-Ching Chiu ◽  
...  
Keyword(s):  
Growth Factor ◽  
Messenger Rna ◽  
Binding Protein ◽  
Insulin Like Growth Factor ◽  
Melanoma Progression ◽  
Factor Ii ◽  
Mrna Binding Protein ◽  
Mrna Binding
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