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Insulin-Like Growth Factor 2 mRNA-Binding Protein 1 (IGF2BP1) Is a Prognostic Biomarker and Associated with Chemotherapy Responsiveness in Colorectal Cancer. Int J Mol Sci 2021; 22:ijms22136940. [PMID: 34203267 PMCID: PMC8267666 DOI: 10.3390/ijms22136940] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/12/2021] [Accepted: 06/24/2021] [Indexed: 12/18/2022] Open
Abstract
Insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1) is an RNA-binding protein and serves as a post-transcriptional fine-tuner regulating the expression of mRNA targets. However, the clinicopathological roles of IGF2BP1 in colorectal cancer (CRC) remains limited. Thus, we aimed to elucidate the clinical significance and biomarker potentials of IGF2BP1 in CRC. A total of 266 specimens from two sets of CRC patients were collected. IGF2BP1 expression was studied by immunohistochemical (IHC) staining. The Kaplan-Meier survival plot and a log-rank test were used for survival analysis. The Cox proportional hazards model was applied to determine the survival impact of IGF2BP1. Public datasets sets from The Cancer Genome Atlas (TCGA) and Human Cancer Metastasis Database (HCMDB), receiver operating characteristic (ROC) plotter, and two CRC cell lines, HCT-116 and DLD-1, were used for validating our findings. We showed that IGF2BP1 was overexpressed in tumor specimens compared to 13 paired normal parts by examining the immunoreactivity of IGF2BP1 (p = 0.045). The increased expression of IGF2BP1 in primary tumor parts was observed regardless of metastatic status (p < 0.001) in HCMDB analysis. IGF2BP1 expression was significantly associated with young age (59.6% vs. 46.7%, p-value = 0.043) and advanced stage (61.3% vs. 40.0%, p-value = 0.001). After controlling for confounding factors, IGF2BP1 remained an independent prognostic factor (HR = 1.705, p-value = 0.005). TCGA datasets analysis indicated that high IGF2BP1 expression showed a lower 5-year survival rate (58% vs. 65%) in CRC patients. The increased expression of IGF2BP1 in chemotherapy non-responder rectal cancer patients was observed using a ROC plotter. Overexpression of IGF2BP1 promoted the colony-forming capacity and 5-fluorouracil and etoposide resistance in CRC cells. Here, IGF2BP1 was an independent poor prognostic marker in CRC patients and contributed to aggressive phenotypes in CRC cell lines.
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Elshafey MR, Ahmed RA, Mourad MI, Gaballah ET. The oncofetal protein IMP3 is an indicator of early recurrence and poor outcome in mucoepidermoid carcinoma of salivary glands. Cancer Biol Med 2016; 13:286-95. [PMID: 27458536 PMCID: PMC4944550 DOI: 10.20892/j.issn.2095-3941.2016.0037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 04/25/2016] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVE Mucoepidermoid carcinoma (MEC) is the most common primary malignancy of the salivary glands. Insulin-like growth factor-II mRNA-binding protein-3 (IMP3) is an important prognostic factor in some cancers and a tool that differentiates between benign and malignant pancreatic lesions. This study aimed to identify a relationship between the expression of IMP3 and the outcome of salivary gland MEC, as well as to differentiate MEC from pleomorphic adenoma (PA). METHODS Tissue specimens from 70 cases of salivary gland MEC, 40 cases of PA, and 10 cases with normal salivary gland were examined immunohistochemically for IMP3. The association among the expression of IMP3, clinicopathological characteristics and patient's survival was assessed. RESULTS IMP3 was present in 51.4% of MEC but absent in PA and normal salivary gland tissues. IMP3 expression was associated with age > 60 years, submandibular gland tumors, tumor size > 4 cm, high-grade tumors, lymph node metastasis, involvement of surgical margins, perineural invasion, distant metastasis, advanced TNM stage, tumor relapse, and death ( P<0.05). Increased expression of IMP3, tumors of the submandibular gland, and lymph node metastasis were independent prognostic factors of -free survival (DFS). In addition, IMP3 was a strong predictor of overall survival (OS) together with distant metastasis and intermediate and high-grade tumors. CONCLUSIONS IMP3 expression is highly important in evaluating the outcome of MEC. IMP3 can be used to differentiate MEC from PA of salivary glands.
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Affiliation(s)
- Mohamed R. Elshafey
- Oral Pathology Department, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt
| | - Rehab A. Ahmed
- Pathology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Mohamed I Mourad
- Oral Pathology Department, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt
| | - Essam T. Gaballah
- Oral Pathology Department, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt
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Wang J, Zhao M, Xiao J, Wu M, Song Y, Yin Y. E-Cadherin, CD44v6, and Insulin-Like Growth Factor-II mRNA-Binding Protein 3 Expressions in Different Stages of Hydatidiform Moles. J Biochem Mol Toxicol 2016; 30:455-61. [PMID: 27238915 DOI: 10.1002/jbt.21809] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/01/2016] [Accepted: 03/11/2016] [Indexed: 12/28/2022]
Abstract
E-cadherin, CD44v6, and IMP3 expression in partial, complete, and invasive hydatidiform moles (HMs) was evaluated. High E-cadherin expression with low CD44v6 expression was observed in partial, complete, and invasive HMs, as well as in normal placental tissues; and there was no significant difference in E-cadherin and CD44v6 expression among the four groups. However, IMP3 expression was gradually decreased in the order of normal placental tissues, partial HMs, complete HMs, and invasive HMs; wherein, invasive HMs had the lowest level. Low IMP3 expression may serve as a prognostic biomarker for HMs, and IMP3 may play a certain role in HMs progression.
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Affiliation(s)
- Jiajun Wang
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Soochow University, Suzhou, People's Republic of China
| | - Min Zhao
- Department of Gynecology, The Affiliated Maternity and Child Health Hospital of Nanjing Medical University, Wuxi, Jiangsu Province, 214002, People's Republic of China
| | - Jianping Xiao
- Department of Prenatal Diagnosis Center, The Affiliated Maternity and Child Health Hospital of Nanjing Medical University, Wuxi, Jiangsu Province, 214002, People's Republic of China
| | - Man Wu
- Department of Gynecology, The Affiliated Maternity and Child Health Hospital of Nanjing Medical University, Wuxi, Jiangsu Province, 214002, People's Republic of China
| | - Yaohua Song
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Soochow University, Suzhou, People's Republic of China.
| | - Yongxiang Yin
- Department of Pathology, The Affiliated Maternity and Child Health Hospital of Nanjing Medical University, Wuxi, Jiangsu Province, 214002, People's Republic of China.
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Bi R, Shen X, Zhang W, Cheng Y, Feng Z, Cai X, Yang W. Clear cell carcinomas of the ovary: a mono-institutional study of 73 cases in China with an analysis of the prognostic significance of clinicopathological parameters and IMP3 expression. Diagn Pathol 2016; 11:17. [PMID: 26837693 PMCID: PMC4736169 DOI: 10.1186/s13000-016-0467-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 01/14/2016] [Indexed: 01/07/2023] Open
Abstract
Background Ovarian clear cell carcinoma (CCC) is an uncommon subtype of ovarian epithelial tumor. The prognostic significance of its clinicopathological parameters is discordant, with the exception of stage as the adverse prognostic factor. The present study aimed to evaluate the prognostic significance of its clinicopathological characteristics and the expression of IMP3 (Insulin-like growth factor-II mRNA-binding protein 3, IMP3 or IGF2BP3) in Chinese patients with primary pure CCC. Methods We collected clinicopathological data from 73 cases with a minimum of 5 years of follow-up and evaluated the expression of IMP3 by immunohistochemistry. Results In total, 49.3 % of the patients were in stage I. Advanced stages were closely related to poor prognosis of disease-free survival (DFS) and overall survival (OS) (P < 0.005). Patients with CCC coexisting with endometriosis tended to be younger and to have unilateral involvement but did not exhibit differences in prognosis compared with patients with CCC without endometriosis. Other histological features such as growth pattern, mitosis, and necrosis did not have prognostic significance. IMP3 was positive in 63 % of patients (46 of 73 cases); Thus, positive expression of IMP3 is an adverse prognostic marker in terms of OS (P = 0.012), even in stage I patients (P = 0.038). Conclusions The present study demonstrates that IMP3 expression is a prognostic marker, with the exception of stage. IMP3 represents a biomarker of unfavorable prognosis even in stage I patients.
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Affiliation(s)
- Rui Bi
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
| | - Xuxia Shen
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
| | - Weiwei Zhang
- Psycho-Oncology Research & Training (CePORT), School of Public Health, The University of Hong Kong, Pok Fu Lam, Hong Kong.
| | - Yufan Cheng
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
| | - Zheng Feng
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. .,Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.
| | - Xu Cai
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
| | - Wentao Yang
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
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Sheen YS, Liao YH, Lin MH, Chiu HC, Jee SH, Liau JY, Chang YL, Chu CY. Insulin-Like Growth Factor II mRNA-Binding Protein 3 Expression Correlates with Poor Prognosis in Acral Lentiginous Melanoma. PLoS One 2016; 11:e0147431. [PMID: 26796627 PMCID: PMC4721868 DOI: 10.1371/journal.pone.0147431] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 01/04/2016] [Indexed: 12/21/2022] Open
Abstract
Insulin-like growth factor-II mRNA-binding protein 3 (IMP-3) is an RNA-binding protein expressed in multiple cancers, including melanomas. However, the expression of IMP-3 has not been investigated in acral lentiginous melanoma (ALM). This study sought to elucidate its prognostic value in ALMs. IMP-3 expression was studied in 93 patients diagnosed with ALM via immunohistochemistry. Univariate and multivariate analyses for survival were performed, according to clinical and histologic parameters, using the Cox proportional hazard model. Survival curves were graphed using the Kaplan-Meier method. IMP-3 was over-expressed in 70 out of 93 tumors (75.3%). IMP-3 expression correlated with thick and high-stage tumor and predicted poorer overall, melanoma-specific, recurrence-free and distant metastasis-free survivals (P = 0.002, 0.006, 0.008 and 0.012, respectively). Further analysis showed that patients with tumor thickness ≤ 4.0 mm and positive IMP-3 expression had a significantly worse melanoma-specific survival than those without IMP-3 expression (P = 0.048). IMP-3 (hazard ratio 3.67, 95% confidence intervals 1.35-9.97, P = 0.011) was confirmed to be an independent prognostic factor for melanoma-specific survival in multivariate survival analysis. Positive IMP-3 expression was an important prognostic factor for ALMs.
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Affiliation(s)
- Yi-Shuan Sheen
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
- Graduate Institute of Pathology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yi-Hua Liao
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ming-Hsien Lin
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Surgery, National Taiwan University Hospital Hsin-Chu Branch, Hisn-Chu, Taiwan
| | - Hsien-Ching Chiu
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Shiou-Hwa Jee
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Jau-Yu Liau
- Graduate Institute of Pathology, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
| | - Yih-Leong Chang
- Graduate Institute of Pathology, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chia-Yu Chu
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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Daikuhara S, Uehara T, Higuchi K, Hosaka N, Iwaya M, Maruyama Y, Matsuda K, Arakura N, Tanaka E, Ota H. Insulin-Like Growth Factor II mRNA-Binding Protein 3 (IMP3) as a Useful Immunohistochemical Marker for the Diagnosis of Adenocarcinoma of Small Intestine. Acta Histochem Cytochem 2015; 48:193-204. [PMID: 26855452 PMCID: PMC4731852 DOI: 10.1267/ahc.15021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Accepted: 10/26/2015] [Indexed: 11/29/2022] Open
Abstract
The biological characteristics and roles of insulin-like growth factor II mRNA-binding protein 3 protein (IMP3) expression in small-intestinal adenocarcinoma were investigated. The value of IMP3 immunostaining in the diagnosis of small-intestinal epithelial lesions was also evaluated. Immunohistochemical expression of IMP3 in normal small-intestinal mucosa adjacent to adenoma and adenocarcinoma lesions, and inflamed duodenal and ileal mucosa was analyzed. Samples assessed were: duodenal ulcer (n=6), Crohn’s disease (n=5), low-grade small-intestinal adenoma (n=10), high-grade small-intestinal adenoma (n=13), small-intestinal adenocarcinoma (n=23), lymph node metastases (LNM; n=7), and preoperative biopsies of small-intestinal adenocarcinoma (n=6). Immunohistochemical expression of Ki-67 and p53 was also analyzed in adenoma and adenocarcinoma samples. IMP3 was not expressed in normal epithelium, but weakly expressed in reparative epithelium. Meanwhile, increased IMP3 expression was associated with a higher degree of dysplasia in adenomas, higher T classification, LNM, Ki-67 positivity, histological differentiation, and lower 5-year disease-free survival, but not p53 expression in adenocarcinoma. IMP3 expression appears to be a late event in the small-intestinal carcinogenesis. Assessing the IMP3 staining pattern can be useful in the diagnosis of small-intestinal epithelial lesions when used in conjunction with other histological criteria.
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Affiliation(s)
- Seiichi Daikuhara
- Department of Gastroenterology, Shinshu University School of Medicine
| | - Takeshi Uehara
- Department of Laboratory Medicine, Shinshu University School of Medicine
| | | | - Noriko Hosaka
- Department of Laboratory Medicine, Nagano Municipal Hospital
| | - Mai Iwaya
- Department of Pathology, Nagano Municipal Hospital
| | - Yasuhiro Maruyama
- Department of Gastroenterology, Shinshu University School of Medicine
| | | | | | - Eiji Tanaka
- Department of Gastroenterology, Shinshu University School of Medicine
| | - Hiroyoshi Ota
- Department of Biomedical Laboratory Sciences, School of Health Sciences, Shinshu University School of Medicine
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Radfar F, Achak F, Rajaei F. The Relationship Between IMP3 Expression in Colorectal Adenocarcinoma and Clinicopathologic Findings. ACTA ACUST UNITED AC 2015. [DOI: 10.17795/bhs27414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Takata A, Takiguchi S, Okada K, Takahashi T, Kurokawa Y, Yamasaki M, Miyata H, Nakajima K, Mori M, Doki Y. Expression of insulin-like growth factor-II mRNA-binding protein-3 as a marker for predicting clinical outcome in patients with esophageal squamous cell carcinoma. Oncol Lett 2014; 8:2027-2031. [PMID: 25295085 PMCID: PMC4186614 DOI: 10.3892/ol.2014.2465] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 06/19/2014] [Indexed: 01/08/2023] Open
Abstract
Insulin-like growth factor-II mRNA-binding protein-3 (IMP3) is an important factor in carcinogenesis, although its clinical significance in esophageal squamous cell carcinoma (ESCC) remains unknown. The present study investigated the associations between IMP3 expression and the clinicopathological parameters. IMP3 expression was assessed in 191 resected ESCC specimens, and the associations between IMP3 expression in ESCC, the clinicopathological parameters and patient prognosis were examined. Using immunohistochemistry, 113 (59.2%) tumors were identified as IMP3-positive. IMP3 positivity correlated significantly with high pathological (p)Stage, pT stage and pN stage. The IMP3-positive patients exhibited a poorer prognosis compared with the IMP3-negative patients. In univariate analyses, histology [hazard ratio (HR), 1.94; 95% confidence interval (CI), 1.18–3.49; P=0.0082], pT (HR, 2.34; 95% CI, 1.55–3.62; P<0.0001), pN (HR, 2.85; 95% CI, 1.81–4.69; P<0.0001), lymphatic invasion (HR, 2.08; 95% CI, 1.26–3.70; P=0.0036), venous invasion (HR, 1.79; 95% CI, 1.21–2.64; P=0.0039), neoadjuvant chemotherapy (NAC) (HR, 2.01; 95% CI, 1.35–3.00; P=0.0005) and IMP3 expression (HR, 2.12; 95% CI, 1.40–3.29; P=0.0003) were significantly associated with overall survival. Using multivariate analyses, histology (HR, 1.87; 95% CI, 1.13–3.29; P=0.014), pN (HR, 2.19; 95% CI, 1.36–3.66; P=0.0010), NAC (HR, 1.88; 95% CI, 1.24–2.86; P=0.0028) and IMP3 expression (HR, 1.84; 95% CI, 1.18–2.93; P=0.0064) were significant prognostic factors. IMP3 may therefore be a prognostic factor for patients with ESCC who have undergone a curative resection.
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Affiliation(s)
- Akihiro Takata
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Shuji Takiguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kaoru Okada
- Department of Surgery, Nishinomiya Municipal Central Hospital, Nishinomiya, Hyogo 663-8014, Japan
| | - Tsuyoshi Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yukinori Kurokawa
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Makoto Yamasaki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Miyata
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kiyokazu Nakajima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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IMP3 expression is associated with poor outcome and epigenetic deregulation in intrahepatic cholangiocarcinoma. Hum Pathol 2014; 45:1184-91. [PMID: 24745619 DOI: 10.1016/j.humpath.2014.01.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 01/16/2014] [Accepted: 01/24/2014] [Indexed: 11/22/2022]
Abstract
IMP3 is a fetal protein not expressed in normal adult tissues. IMP3 is an oncoprotein and a useful biomarker for a variety of malignancies and is associated with reduced overall survival of a number of them. IMP3 expression and its prognostic value for patients with intrahepatic cholangiocarcinoma (ICC) have not been well investigated. The molecular mechanism underlying IMP3 expression in human cancer cells remains to be elucidated. Here we investigated IMP3 expression in ICC and adjacent nonneoplastic liver in 72 unifocal primary ICCs from a single institute by immunohistochemistry, immunoblotting, and real-time polymerase chain reaction. IMP3 was specifically expressed in cancer cells but not in the surrounding normal tissue, and 59 (82%) of 72 ICCs were IMP3 positive by immunohistochemistry. Among 35 cases with lymphovascular invasion, 26 (74%) showed IMP3 positivity in lymph node metastases. IMP3 expression was significantly correlated with tumor size, pathological grade, metastasis, and clinical stage. Kaplan-Meier analysis demonstrated an inverse correlation between IMP3 expression and overall survival rate. Multivariate analysis revealed that IMP3 was the only risk factor associated with survival. To further explore the mechanism of IMP3 expression in cancers, we identified 2 CpG islands at IMP3 proximal promoter. Interestingly, the IMP3 promoter was almost completely demethylated in ICCs in contrast to densely methylated promoter in normal liver tissues. IMP3 expression is a useful biomarker for ICCs and can provide an independent prognostic value for patients with ICC. To our knoweldge, this is the first direct evidence of epigenetic deregulation of IMP3 in human cancer.
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Lin L, Zhang J, Wang Y, Ju W, Ma Y, Li L, Chen L. Insulin-like growth factor-II mRNA-binding protein 3 predicts a poor prognosis for colorectal adenocarcinoma. Oncol Lett 2013; 6:740-744. [PMID: 24137402 PMCID: PMC3789059 DOI: 10.3892/ol.2013.1458] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Accepted: 06/17/2013] [Indexed: 11/26/2022] Open
Abstract
Insulin-like growth factor-II mRNA-binding protein 3 (IMP3) has been recently identified as a marker of aggressive behavior in several types of tumors. The aim of the present study was to detect the expression of the IMP3 protein in colorectal adenocarcinoma (CRA) and to identify a correlation with the clinicopathological features of the disease. IMP3 was evaluated in 186 samples of CRA using immunohistochemical methods. The correlation between IMP3 expression and the clinicopathological features of colorectal cancer was evaluated by the χ2 and Fisher’s exact tests. Survival rates were calculated using the Kaplan-Meier method and the correlation between IMP3 protein expression and the prognosis of patients with CRA was analyzed using Cox analysis. Of the 186 adjacent normal mucosa (ANM) cases, the 22 that exhibited dysplasia demonstrated weak IMP3 expression and the 164 without dysplasia showed no expression. Of the 186 CRA cases, immunohistochemical staining for IMP3 was observed in 143 cases (76.9%). A comparison of IMP3 expression between the CRA and ANM samples revealed stronger immunohistochemical reactivity in the CRA tissues (P<0.01). High IMP3 expression was associated with differentiation, lymphoid metastasis, TNM stage, Ki-67 labeling index and a poor patient outcome (P<0.05). In the multivariate analysis, IMP3 emerged as an independent predictor of survival. The present study demonstrated that IMP3 is able to promote the aggressiveness of cancer behavior, resulting in a poor prognosis for patients with CRA. Consequently, IMP3 may be regarded as a novel proliferation and prognostic indicator for patients with CRA.
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Affiliation(s)
- Lijuan Lin
- Department of Medicine Imaging, Eastern Liaoning University College of Medicine, Liaoning 118000, P.R. China
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Chen YL, Jeng YM, Hsu HC, Lai HS, Lee PH, Lai PL, Yuan RH. Expression of insulin-like growth factor II mRNA-binding protein 3 predicts early recurrence and poor prognosis in intrahepatic cholangiocarcinoma. Int J Surg 2012; 11:85-91. [PMID: 23246869 DOI: 10.1016/j.ijsu.2012.11.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 11/26/2012] [Accepted: 11/29/2012] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Insulin-like growth factor-II mRNA-binding protein 3 (IMP3), a newly identified oncofetal RNA-binding protein, plays a pivotal role in the regulation of cell growth and migration during early stages of embryogenesis, and is found to be expressed in various human cancers. In this study, we elucidated the clinicopathological significance of IMP3 expression in intrahepatic cholangiocarcinoma (ICC). METHODS From March 1995 to December 2003, 61 surgically resected, unifocal primary ICCs were studied. IMP3 protein expression was detected by immunohistochemical staining. RESULTS IMP3 protein was expressed in 25 of 61 ICCs (41.0%). In addition to correlating with tumor grade (p = 0.0276), tumor stage (p = 0.0059), lymphovascular invasion (p = 0.0198), serum carbohydrate antigen 19-9 level (p = 0.0146), IMP3 expression predicted early tumor recurrence (ETR) (p = 0.0059) and was a strong indicator of worse disease-free survival (p = 0.0001) and overall survival (p = 0.0007). Even though we did not find that IMP3 expression exerted prognostic impact independent of tumor stage, multivariate analysis confirmed that IMP3 expression was an independent risk factor of high-stage tumor and ETR (p = 0.0170, and p = 0.0052, respectively), and thus it contributed to poor prognosis in ICC patients. CONCLUSIONS IMP3 expression can serve as a novel maker for ETR and prognostic prediction, and may be a target for adjuvant therapy of patients with ICC after tumor resection.
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Affiliation(s)
- Yu-Ling Chen
- Graduate Institute of Pathology, College of Medicine, National Taiwan University, and Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
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Insulin-like growth factor 2 mRNA-binding proteins (IGF2BPs): post-transcriptional drivers of cancer progression? Cell Mol Life Sci 2012; 70:2657-75. [PMID: 23069990 PMCID: PMC3708292 DOI: 10.1007/s00018-012-1186-z] [Citation(s) in RCA: 488] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 09/28/2012] [Accepted: 10/01/2012] [Indexed: 12/21/2022]
Abstract
The insulin-like growth factor-2 mRNA-binding proteins 1, 2, and 3 (IGF2BP1, IGF2BP2, IGF2BP3) belong to a conserved family of RNA-binding, oncofetal proteins. Several studies have shown that these proteins act in various important aspects of cell function, such as cell polarization, migration, morphology, metabolism, proliferation and differentiation. In this review, we discuss the IGF2BP family’s role in cancer biology and how this correlates with their proposed functions during embryogenesis. IGF2BPs are mainly expressed in the embryo, in contrast with comparatively lower or negotiable levels in adult tissues. IGF2BP1 and IGF2BP3 have been found to be re-expressed in several aggressive cancer types. Control of IGF2BPs’ expression is not well understood; however, let-7 microRNAs, β-catenin (CTNNB1) and MYC have been proposed to be involved in their regulation. In contrast to many other RNA-binding proteins, IGF2BPs are almost exclusively observed in the cytoplasm where they associate with target mRNAs in cytoplasmic ribonucleoprotein complexes (mRNPs). During development, IGF2BPs are required for proper nerve cell migration and morphological development, presumably involving the control of cytoskeletal remodeling and dynamics, respectively. Likewise, IGF2BPs modulate cell polarization, adhesion and migration in tumor-derived cells. Moreover, they are highly associated with cancer metastasis and the expression of oncogenic factors (KRAS, MYC and MDR1). However, a pro-metastatic role of IGF2BPs remains controversial due to the lack of ‘classical’ in vivo studies. Nonetheless, IGF2BPs could provide valuable targets in cancer treatment with many of their in vivo roles to be fully elucidated.
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Lochhead P, Imamura Y, Morikawa T, Kuchiba A, Yamauchi M, Liao X, Qian ZR, Nishihara R, Wu K, Meyerhardt JA, Fuchs CS, Ogino S. Insulin-like growth factor 2 messenger RNA binding protein 3 (IGF2BP3) is a marker of unfavourable prognosis in colorectal cancer. Eur J Cancer 2012; 48:3405-13. [PMID: 22840368 DOI: 10.1016/j.ejca.2012.06.021] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 06/05/2012] [Accepted: 06/23/2012] [Indexed: 01/08/2023]
Abstract
BACKGROUND Evidence suggests that insulin-like growth factor 2 messenger RNA binding protein 3 (IGF2BP3, also known as IMP3) represents a promising cancer biomarker. However, the clinical, pathological, molecular and prognostic features of IGF2BP3-positive colorectal cancers remain uncertain. MATERIALS AND METHODS We evaluated IGF2BP3 expression by immunohistochemistry in 671 rectal and colon cancer cases that form part of a molecular pathological epidemiology database. Cox proportional hazards regression models were used to compute mortality hazard ratio (HR), adjusting for clinical, pathological and molecular features, including microsatellite instability, the CpG island methylator phenotype, LINE-1 methylation and KRAS, BRAF and PIK3CA mutations. RESULTS Among 671 colorectal cancers, 234 (35%) tumours were positive for IGF2BP3. In contrast, normal colorectal epithelium was negative for IGF2BP3 in all 403 specimens of normal mucosa adjacent to carcinoma. IGF2BP3 positivity was associated with poor differentiation (p=0.0003), stage III-IV disease (p=0.0081), BRAF mutation (p=0.031), and LINE-1 hypomethylation (p=0.020). IGF2BP3 positivity was significantly associated with shorter colorectal cancer-specific [log-rank p<0.0001; multivariate HR, 1.37; 95% confidence interval (CI), 1.02-1.84] and overall survival (log-rank p=0.0004; multivariate HR, 1.32; 95% CI, 1.05-1.66). CONCLUSIONS IGF2BP3 expression in colorectal cancer is associated with adverse clinical outcome. Our findings support a role for IGF2BP3 as a diagnostic and/or prognostic biomarker in colorectal cancer.
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Affiliation(s)
- Paul Lochhead
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02215, United States.
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Chen ST, Jeng YM, Chang CC, Chang HH, Huang MC, Juan HF, Hsu CH, Lee H, Liao YF, Lee YL, Hsu WM, Lai HS. Insulin-like growth factor II mRNA-binding protein 3 expression predicts unfavorable prognosis in patients with neuroblastoma. Cancer Sci 2011; 102:2191-8. [PMID: 21917080 PMCID: PMC11158860 DOI: 10.1111/j.1349-7006.2011.02100.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Insulin-like growth factor II mRNA-binding protein 3 (IMP3) has been reported to enhance proliferation and invasion in various cancers. The role of IMP3 on neuroblastoma (NB) is unknown. We aimed to clarify the prognostic significance of IMP3 expression in patients with NB. By microarray analysis, high IMP3 expression was found in patients with poor outcome. IMP3 expression in 90 NB samples was analyzed by immunohistochemical staining to correlate with clinical stages, histology, and patient outcome. Positive IMP3 expression was detected in 52 of 90 patients, and was significantly correlated with undifferentiated histology, advanced stages, MYCN amplification, and poor outcome. In subgroups, positive IMP3 expression could predict an even worse prognosis in patients with advanced disease, with normal MYCN status, or with MYCN amplification (P = 0.005, P = 0.001, and P = 0.033, respectively). The IMP3 expression decreased by induction of differentiation with retinoid acid treatment in SK-N-DZ and SK-N-SH cells in vitro. The invasion ability of NB cells also decreased as IMP3 knockdown by using RNA interference in vitro. In summary, high expression of IMP3 in NB might contribute to the undifferentiated phenotype and invasive behaviors, leading to a poor prognosis. Determining IMP3 expression in NB could help to improve a personalized therapy.
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Affiliation(s)
- Szu-Ta Chen
- Department of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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Hwang YS, Park KK, Cha IH, Kim J, Chung WY. Role of insulin-like growth factor-II mRNA-binding protein-3 in invadopodia formation and the growth of oral squamous cell carcinoma in athymic nude mice. Head Neck 2011; 34:1329-39. [PMID: 22052854 DOI: 10.1002/hed.21929] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2011] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The invadopodia are specialized structures that degrade the extracellular matrix (ECM) and promote cell invasion and metastasis. Understanding the forms and functions of invadopodia should facilitate the proper identification of novel targets for antiinvasive therapy. METHODS To understand the role of insulin-like growth factor-II mRNA-binding protein-3 (IMP-3) in invadopodia formation and cancer invasion, we performed IMP-3 gene silencing, invadopodia formation, ECM degradation assay, zymography, western blot, and mouse xenograft. RESULTS We demonstrate that invadopodia evidenced ECM degradation activity in oral squamous cell carcinoma (OSCC). Downregulation of IMP-3 inhibited invadopodia formation, ECM degradation, and tumor growth and invasiveness. Epidermal growth factor receptor (EGFR) signaling may perform a critical function in invadopodia formation, ECM degradation, IMP-3, and cortactin expression. CONCLUSION IMP-3 may be intimately correlated with cancer invasion through invadopodia in oral cancer. The overexpression of IMP-3 in oral cancer was predictive of a high correlation with cancer growth and invasion.
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Affiliation(s)
- Young Sun Hwang
- Oral Cancer Research Institute, Yonsei University College of Dentistry, 134, Shinchon-dong, Seodaemun-gu, Seoul, Korea.
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Okada K, Fujiwara Y, Nakamura Y, Takiguchi S, Nakajima K, Miyata H, Yamasaki M, Kurokawa Y, Takahashi T, Mori M, Doki Y. Oncofetal protein, IMP-3, a potential marker for prediction of postoperative peritoneal dissemination in gastric adenocarcinoma. J Surg Oncol 2011; 105:780-5. [PMID: 22012575 DOI: 10.1002/jso.22108] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 09/10/2011] [Indexed: 01/13/2023]
Abstract
BACKGROUND The aim of this study was to determine the expression of insulin-like growth factor-II messenger RNA (mRNA)-binding protein-3 (IMP-3) and its clinical significance in gastric cancers, as well the prognostic value of its expression in the peritoneal lavage fluid after surgery. METHODS IMP-3 expression was examined by immunohistochemistry in 96 primary gastric tumors. IMP-3 mRNA expression in peritoneal lavage fluid obtained at laparotomy was determine by real-time quantitative reverse transcriptase-polymerase chain reaction (RT-PCR). RESULTS Positive staining for IMP-3 was observed in 74% (71/96) of the tumors. IMP-3 expression in gastric tumors correlated significantly with worst overall survival (OS) and recurrence-free survival. Multivariate analyses identified pathological N stage and IMP-3 expression as significant independent prognostic factors for disease-free survival. Eight (28%) of 36 peritoneal lavage samples were cytologically negative but positive for IMP-3 mRNA expression by RT-PCR. The OS of patients with IMP-3-positive peritoneal lavage was significantly worse than of those with negative expression. CONCLUSIONS IMP-3 expression in primary gastric tumors was an independent poor prognostic factor. IMP-3 mRNA expression in peritoneal lavage fluid was a predictor of recurrence after surgery in gastric cancer and a marker of poor prognosis.
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Affiliation(s)
- Kaoru Okada
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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Lin CY, Chen ST, Jeng YM, Yeh CC, Chou HY, Deng YT, Chang CC, Kuo MYP. Insulin-like growth factor II mRNA-binding protein 3 expression promotes tumor formation and invasion and predicts poor prognosis in oral squamous cell carcinoma. J Oral Pathol Med 2011; 40:699-705. [PMID: 23647076 DOI: 10.1111/j.1600-0714.2011.01019.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Insulin-like growth factor II mRNA-binding protein 3 (IGF2BP3), an oncofetal RNA-binding protein, has been implicated in the enhancement of proliferation and invasion in various cancers. This study aimed to investigate the clinical significance and functional role of IGF2BP3 expression in oral squamous cell carcinoma (OSCC). METHODS IGF2BP3 expression in 93 OSCC patients was investigated using immunohistochemical staining and correlated with clinical parameters and patients' survival. The effect of IGF2BP3 on cell invasion ability was evaluated by RNA interference in OSCC cell line. RESULTS High expression of IGF2BP3 in OSCC was significantly correlated with large tumor size and lymph node metastasis. Kaplan-Meier analysis revealed that oral cancer patients with high IGF2BP3 expression had a significantly lower 5-year survival (P = 0.0017). Multivariate analysis of clinical samples demonstrated IGF2BP3 to be an independent prognosis factor (P = 0.003). Moreover, the IGF2BP3 shRNA significantly suppressed the invasion ability of OSCC in vitro, and the knockdown of endogenous IGF2BP3 expression also inhibited tumor formation in vivo. CONCLUSIONS IGF2BP3 enhances cell invasion ability and tumorigenicity in human OSCC in vitro and in vivo. IGF2BP3 is an independent prognostic factor in patients with OSCC. Targeting of IGF2BP3 could potentially suppress the tumor growth and metastasis to improve the outcome of patients with OSCC.
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Affiliation(s)
- Chiao-Ying Lin
- Department of Dentistry, School of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
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18
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Lu SH, Chen YL, Shun CT, Lai JN, Peng SY, Lai PL, Hsu HC. Expression and prognostic significance of gastric-specific annexin A10 in diffuse- and intestinal-type gastric carcinoma. J Gastroenterol Hepatol 2011; 26:90-7. [PMID: 21175800 DOI: 10.1111/j.1440-1746.2010.06480.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND AND AIMS Annexin A10 (ANXA10) and its liver-specific short isoform (ANXA10S) had tissue-restricted expression. The downregulation of ANXA10S is correlated with tumor progression and poor prognosis in hepatocellular carcinoma. The aim of the present study was to validate the tissue distribution and explore the role of the ANXA10 protein expression in gastric carcinoma. METHODS We examined the ANXA10 protein expression in human and animal tissues and 356 resected primary gastric carcinomas, using specific mouse and rabbit polyclonal antibodies, by immunohistochemical staining. RESULTS The ANXA10 protein is a nuclear protein specifically expressed in fetal and adult gastric mucosa and Brunner's gland across species, including humans, minipigs, woodchucks, and mice, and is commonly lost in gastric mucosa with intestinal metaplasia. The ANXA10 protein was expressed in 43.5% (155 cases) of gastric carcinomas; 74.2% (98/132) in the diffuse-type gastric carcinoma (DGC), 73.7% (28/38) in the mixed-type gastric carcinoma, and significantly lower in the intestinal-type gastric carcinoma (IGC) and indeterminate groups, 16.8% (28/167) and 5.3% (1/19), respectively (P<1×10(-8)). IGC with ANXA10 expression was correlated with a higher stage (P=0.049), particularly higher in stage IIIA/IIIB/IV IGC than lower-stage (IA/IB/II) tumors (P=0.005), but was not correlated with age, sex, and nodal status. In contrast, DGC with ANXA10 expression was associated with younger age, female patients, and importantly, lower tumor stage and lymph node metastasis (P=0.007, P=0.065, P=0.024, and P=0.0014, respectively). Moreover, DGC with ANXA10 expression had a better 5-year patient survival (P=0.0048), whereas IGC with ANXA10 expression had a lower 5-year survival (P=0.034). CONCLUSIONS The ANXA10 protein expression is a novel marker of gastric differentiation, and is differentially expressed in IGC and DGC, with opposite prognostic significance.
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Affiliation(s)
- Su-Hsi Lu
- Graduate Institute of Pathology, College of Medicine, National Taiwan University, Taipei, Taiwan
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Song DH, Yang JW, Kim DC, Lee JS, Lee JH, Jeong SH, Ko GH. Insulin-like Growth Factor II mRNA-Binding Protein 3 Expression in Benign and Premalignant Lesions and Carcinomas of the Stomach. KOREAN JOURNAL OF PATHOLOGY 2011. [DOI: 10.4132/koreanjpathol.2011.45.4.379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Dae Hyun Song
- Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jung Wook Yang
- Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Dong Chul Kim
- Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jong Sil Lee
- Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jeong Hee Lee
- Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Sang Ho Jeong
- Gyeongsang Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
- Department of Surgery, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Gyung Hyuck Ko
- Department of Pathology, Gyeongsang National University School of Medicine, Jinju, Korea
- Gyeongsang Institute of Health Science, Gyeongsang National University School of Medicine, Jinju, Korea
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Ryan JL, Jones RJ, Kenney SC, Rivenbark AG, Tang W, Knight ER, Coleman WB, Gulley ML. Epstein-Barr virus-specific methylation of human genes in gastric cancer cells. Infect Agent Cancer 2010; 5:27. [PMID: 21194482 PMCID: PMC3023757 DOI: 10.1186/1750-9378-5-27] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 12/31/2010] [Indexed: 12/13/2022] Open
Abstract
Background Epstein-Barr Virus (EBV) is found in 10% of all gastric adenocarcinomas but its role in tumor development and maintenance remains unclear. The objective of this study was to examine EBV-mediated dysregulation of cellular factors implicated in gastric carcinogenesis. Methods Gene expression patterns were examined in EBV-negative and EBV-positive AGS gastric epithelial cells using a low density microarray, reverse transcription PCR, histochemical stains, and methylation-specific DNA sequencing. Expression of PTGS2 (COX2) was measured in AGS cells and in primary gastric adenocarcinoma tissues. Results In array studies, nearly half of the 96 human genes tested, representing 15 different cancer-related signal transduction pathways, were dysregulated after EBV infection. Reverse transcription PCR confirmed significant impact on factors having diverse functions such as cell cycle regulation (IGFBP3, CDKN2A, CCND1, HSP70, ID2, ID4), DNA repair (BRCA1, TFF1), cell adhesion (ICAM1), inflammation (COX2), and angiogenesis (HIF1A). Demethylation using 5-aza-2'-deoxycytidine reversed the EBV-mediated dysregulation for all 11 genes listed here. For some promoter sequences, CpG island methylation and demethylation occurred in an EBV-specific pattern as shown by bisulfite DNA sequencing. Immunohistochemistry was less sensitive than was western blot for detecting downregulation of COX2 upon EBV infection. Virus-related dysregulation of COX2 levels in vitro was not recapitulated in vivo among naturally infected gastric cancer tissues. Conclusions EBV alters human gene expression in ways that could contribute to the unique pathobiology of virus-associated cancer. Furthermore, the frequency and reversability of methylation-related transcriptional alterations suggest that demethylating agents have therapeutic potential for managing EBV-related carcinoma.
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Affiliation(s)
- Julie L Ryan
- Department of Pathology and Laboratory Medicine and the Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599-7525, USA.
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Righi A, Zhang S, Jin L, Scheithauer BW, Kovacs K, Kovacs G, Goth MI, Korbonits M, Lloyd RV. Analysis of IMP3 expression in normal and neoplastic human pituitary tissues. Endocr Pathol 2010; 21:25-31. [PMID: 19898970 DOI: 10.1007/s12022-009-9096-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Insulin-like growth factor II mRNA-binding protein 3 (IMP3) is an oncofetal protein highly expressed in fetal tissue and malignant tumors but rarely found in adult benign tissues. In various tumors, IMP3 expression is correlated with increased tumor aggressiveness and reduced overall survival. To our knowledge, IMP3 expression has not been investigated in pituitary tumors. We analyzed the immunohistochemical expression of IMP3 in five normal pituitary tissues and 75 pituitary tumors (64 adenomas and 11 carcinomas) to determine if specific tumor types expressed IMP3 and if there were differences in IMP3 expression between adenomas and carcinomas. Immunohistochemical analysis showed that IMP3 was positive in four (80%) normal pituitaries with focal stain in a subset of normal anterior pituitary cells. IMP3 was expressed in 31% (20/64) of adenomas and in 36% (4/11) of carcinomas. A slightly higher level of IMP3 expression was observed in PRL-GH-TSH adenomas compared to the other types of pituitary adenomas. Expression of IMP3 was not significantly higher in carcinomas than in adenomas (p = 0.737). RT-PCR and Western Blotting supported the heterogeneous expression of IMP3. These results indicate that IMP3 is expressed both in normal and in neoplastic pituitary gland tissues without significant differences in expression levels in pituitary carcinomas.
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Affiliation(s)
- Alberto Righi
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
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Yuan RH, Wang CC, Chou CC, Chang KJ, Lee PH, Jeng YM. Diffuse expression of RNA-binding protein IMP3 predicts high-stage lymph node metastasis and poor prognosis in colorectal adenocarcinoma. Ann Surg Oncol 2009; 16:1711-9. [PMID: 19357927 DOI: 10.1245/s10434-009-0446-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2008] [Revised: 02/03/2009] [Accepted: 02/19/2009] [Indexed: 01/21/2023]
Abstract
BACKGROUND IMP3 (insulinlike growth factor II mRNA-binding protein 3) is a newly identified oncofetal RNA-binding protein that is involved in cell growth and cell migration during the early stages of embryogenesis. This study sought to elucidate its role in tumor progression and prognosis of colorectal adenocarcinoma (CRA). METHODS IMP3 expression in 186 surgically resected unifocal primary CRAs was analyzed by immunohistochemistry. The proportions of tumor cells positive for IMP3 were scored into diffuse (> or =50%), focal or heterogeneous (10-50%), and trace (<10%), and the expression levels were correlated with clinicopathologic features and patient survival. RESULTS Cytoplasmic immunoreactivity for IMP3 was diffuse in 66 (35%), focal or heterogeneous in 38 (21%), and trace in 34 (18%) samples. No staining was seen in the adjacent nontumorous tissue. Diffuse IMP3 expression correlated with large tumor (>3 cm, P = .0452), high-stage tumor (IIIa-IV, P = .0417), lymph node metastasis (P = .0232), high lymph node ratio (LNR > or = .7, P = .0016), and lower 5-year survival (P = .0012). Further analysis showed that patients with high-stage CRA and diffuse IMP3 expression had the worst survival rate (P < .0001)-far worse than those without diffuse IMP3 expression (P = .0038). Moreover, multivariant analysis showed diffuse IMP3 expression, serosal invasion, LNR, tumor stage, and adjuvant chemotherapy were independent prognostic factors in CRA. CONCLUSION Diffuse IMP3 protein expression correlates with invasion and aggressiveness during cancer growth and metastasis, and it is an important prognostic factor of CRAs.
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Affiliation(s)
- Ray-Hwang Yuan
- Department of Surgery, Tao-Yuan General Hospital, R.O.C., Taiwan
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