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Objective To study the expression of insulin-like growth factor-Ⅱ receptor(IGF-Ⅱ R) and its relationship with the prognosis of human epidermalgrowth factor receptor 2 (HER2) positive breast cancer.Methods The expression of IGF-Ⅱ R in 104 specimens of HER2 positive breast cancer was evaluated by immunohistochemistry.The expression was rated on 2 scales:negative and positive.The age,pathological type,tumor size,lymph node involvement,status of estrogen receptor(ER),and progesterone receptor(PR) of all the cases were reviewed.The relationship between the expression of IGF-Ⅱ R and the above pathological parameters were analyzed by statistical methods.The relationship between the expression of IGF-Ⅱ R and the disease-free survival and overall survival was studied.Results The positive expression rate of IGF-Ⅱ R was 43.3％ (45/104).The positive rate of IGF-Ⅱ R was significantly higher in the lymph node positive group than in the lymph node negative group (61.5 ％ vs 25.0％,P =0.000).No significant correlation was observed between the expression of IGF-Ⅱ R and age,pathological type,tumor size,status of ER,or PR.The disease-free survival and overall survival was significantly lower in IGF-Ⅱ R positive group than in IGF-Ⅱ R negative group.(The 5-year disease-free survival:62.6％ vs 84.7％,P =0.022; The 5-year overall survival:71.5％ vs 89.6％,P =0.024).Cox regressive analysis showed that the lymph node status was an independent risk factor of disease-free survival and overall survival,while the IGF-Ⅱ R was not.Conclusion The positive expression of IGF-Ⅱ R in HER2 positive breast cancer indicates poor prognosis.The expression of IGF-Ⅱ R may be regulated by insulin-like growth factor-Ⅱ (IGF-Ⅱ).
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Objective To discuss the influence of Breviscapine Injection on concentration of serum IGF-Ⅱ in pregnant rats and changes of fetus rat body weight, body length, and body-mass index. Methods Radio-immunity was used to determine the concentration of serum IGF- Ⅱ in mother rats and fetus rats. Body weight and body length were surveyed,the IGF- Ⅱ concentration of fetus rats in the FGR group was lower than the control group (P＜0.05) and IGF- Ⅱ concentration control group＞the FGR+intervention group＞ the FGR group, and the difference between each group was significant (P＜0.05).Breviscapine can treat fetal growth retardation effectively.
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Objective To investigate the effects of IGF-Ⅱ on adriamycin-induced apoptosis of hepatocellular carcinoma cell line(HepG2).Methods Cultured HepG2 cells were divided into:①group A:control group;②group B:ADM group(200 ng/ml);③group C:2 ng/ml IGF-Ⅱ+200 ns/ml ADM group;④group D:20 ng/ml IGF-Ⅱ+200 ng/ml ADM group;⑤group E:200 ng/ml IGF-Ⅱ+200 ng/ml ADM group. After HepG2 were treated for 48 h,MTT colorimetry was performed to determine the cell viability,Flow cytometry was used to detect the cell apoptosis rate,and Weastern-blot was performed to evaluate the expression of survivin. Results The cell viability of group A、B、C、D、E was respectively 0.568±0.025、0.201±0.020、0.232±0.027、0.268±0.013 and 0.304±0.019;The cell apoptosis rate of group A、B、C、D;E was respectively 6.9％±1.3％、35.4％±2.1％、31.2％±2.2％、26.4％±1.7％and 21.7％±1.9％;Survivinβ-actin of group A、B、C、D、E was respectively 0.527±0.039、0.147±0.081、0.311±0.069、0.421±0.033 and 0.469±0.031.The cell viability in IGF-Ⅱ+ADM group was better than ADM group(P＜0.01),the cell apoptosis rate in IGF-Ⅱ+ADM group was significantly lower than ADM group(P＜0.01),the expression level of survivin in IGF-Ⅱ +ADM group was significantly higher than ADM group(P＜0.01). Conclusions IGF-Ⅱ inhibits ADM-induced apoptosis of HepG2 cells,probably by up-regulating cell's survivin expression.
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Objective To investigate the relationship among IGF-II expression and cell proliferation and apoptosis in human colorectal adenocarcinoma. Methods 60 paraffin embedded samples of human colorectal adenocarcinomas were used in this study. IGF-ⅡmRNA expression was detected by in situ hybridization, proliferation cell nuclear antigen(PCNA) protein was measured by immunohistochemical staining and apoptosis was determined by TUNEL technology. Fifteen normal colorectal tissues were used as controls. Computerized image analysis system qualitatively analyzed the positive ratio of above three indices in the cancer and normal tissues. Results The percentage of IGF-ⅡmRNA expression was significantly higher in colorectal adenocarcinoma (39.64%?7.32%) than that in normal colorectal tissues (23.21%?4.10%) (P
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Objective To investigate the change of insulin-like growth factor Ⅱ(IGF-Ⅱ) and its relation with infection in severely burned patients.Methods RIA method was used to determine the serum IGF-Ⅱ level in patients with severe burn.Results Compared with control group, the level of IGF-Ⅱ was increased significantly at 5 postburn days , and persistent 35 days (P0 05).Conclusion IGF-Ⅱ is involved in the pathogenesis of burn , and closely correlated with the infection after burn.
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Purpose:Constructing a high-flux tissue microarray/tissue chip and detecting IGF-Ⅱprotein expression of cases by it, and to determine the correlation between IGF-Ⅱprotein expression and lung cancer. Methods:A series of tissue chips were prepared by using tissue arrayer with samples from lung cancers of different histological classifications. Specimens from 54 cases of lung cancer and 10 cases of normal lung tissues were detected immunohistochemically on a tissue chip for IGF-Ⅱprotein expression and its correlation to clinic-pathological parameters was analyzed statistically. Results:Positive rate of IGF-Ⅱprotein in lung cancer was 42.6%(23/54), which was higher than that of normal lung(0.0%, 0/10, P0.05). Conclusions:IGF-Ⅱprotein might be related to the malignant behaviors of lung cancer. Detecting the expression of IGF-Ⅱ protein probably can predict the prognosis of lung cancer. It is feasible to utilize tissue chip for screening of clinical tissue specimens on a large scale.
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Objective To study the growth inhibition of human hepatoma cells tranfected with type Ⅱ insulin like growth factor receptor (IGF ⅡR) antisense gene. Methods We constructed the recombinant eucaryotic expression plasmids of IGF ⅡR sense and antisense genes, which were transfected into SMMC 7721 human hepatoma cell line using calcium phosphate coprecipitation, and selected in DMEM supplemented with 500 ?g/ml G418(Geneticin) for 2～3 weeks. Then the total number of colonies formed was counted. The effect of IGF ⅡR antisense gene transfection on endogenous IGF ⅡR mRNA levels was examined by Northern blot, and the growth rate and the ability of the transfected cells to form colonies in soft agar medium were also examined. Results The hepatoma cells transfected with IGF ⅡR antisense gene exhibited significant reduction in endogenous IGF ⅡR messenger RNA(mRNA) levels and loss of their ability for anchorage independent growth in soft agar. The IGF ⅡR antisense gene supressed the formation of colonies of SMMC 7721 cells resistant to G418 without alteration on cell growth curve. Conclusion The IGF ⅡR antisense gene expression effectively blocks IGF Ⅱ to IGF ⅡR autocrine and/or paracrine signal transduction pathway and reverses certain aspects of the cell malignant phenotype.