1
|
Xu W, Li Y, Liu L, Xie J, Hu Z, Kuang S, Fu X, Li B, Sun T, Zhu C, He Q, Sheng W. Icaritin-curcumol activates CD8 + T cells through regulation of gut microbiota and the DNMT1/IGFBP2 axis to suppress the development of prostate cancer. J Exp Clin Cancer Res 2024; 43:149. [PMID: 38778379 PMCID: PMC11112810 DOI: 10.1186/s13046-024-03063-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Prostate cancer (PCa) incidence and mortality rates are rising. Our previous research has shown that the combination of icariin (ICA) and curcumol (CUR) induced autophagy and ferroptosis in PCa cells, and altered lipid metabolism. We aimed to further explore the effects of the combination of ICA and CUR on gut microbiota, metabolism, and immunity in PCa. METHODS A mouse subcutaneous RM-1 cell tumor model was established. 16 S rRNA sequencing was performed to detect changes in fecal gut microbiota. SCFAs in mouse feces, and the effect of ICA-CUR on T-cell immunity, IGFBP2, and DNMT1 were examined. Fecal microbiota transplantation (FMT) was conducted to explore the mechanism of ICA-CUR. Si-IGFBP2 and si/oe-DNMT1 were transfected into RM-1 and DU145 cells, and the cells were treated with ICA-CUR to investigate the mechanism of ICA-CUR on PCa development. RESULTS After treatment with ICA-CUR, there was a decrease in tumor volume and weight, accompanied by changes in gut microbiota. ICA-CUR affected SCFAs and DNMT1/IGFBP2/EGFR/STAT3/PD-L1 pathway. ICA-CUR increased the positive rates of CD3+CD8+IFN-γ, CD3+CD8+Ki67 cells, and the levels of IFN-γ and IFN-α in the serum. After FMT (with donors from the ICA-CUR group), tumor volume and weight were decreased. SCFAs promote tumor development and the expression of IGFBP2. In vitro, DNMT1/IGFBP2 promotes cell migration and proliferation. ICA-CUR inhibits the expression of DNMT1/IGFBP2. CONCLUSIONS ICA-CUR mediates the interaction between gut microbiota and the DNMT1/IGFBP2 axis to inhibit the progression of PCa by regulating immune response and metabolism, suggesting a potential therapeutic strategy for PCa.
Collapse
Affiliation(s)
- Wenjing Xu
- Department of Dermatology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, 410021, China
| | - Yingqiu Li
- Medical School, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Lumei Liu
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, 410208, China
- Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Jing Xie
- School of Traditional Chinese Medicine, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China
- School of Rehabilitation Medicine and Health Care, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China
| | - Zongren Hu
- School of Traditional Chinese Medicine, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China
- School of Rehabilitation Medicine and Health Care, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China
| | - Shida Kuang
- Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, 410208, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Xinying Fu
- Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, 410208, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Bonan Li
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, 410208, China
- Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Tiansong Sun
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, 410208, China
- Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Congxu Zhu
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, 410208, China
- Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Qinghu He
- Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, 410208, China.
- School of Traditional Chinese Medicine, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China.
- School of Rehabilitation Medicine and Health Care, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China.
| | - Wen Sheng
- School of Traditional Chinese Medicine, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China.
- School of Rehabilitation Medicine and Health Care, Hunan University of Medicine, No. 492 Jinxi South Road, Huaihua, 418000, China.
| |
Collapse
|
2
|
Gujrati H, Ha S, Mohamed A, Wang BD. MicroRNA-mRNA Regulatory Network Mediates Activation of mTOR and VEGF Signaling in African American Prostate Cancer. Int J Mol Sci 2022; 23:ijms23062926. [PMID: 35328346 PMCID: PMC8949405 DOI: 10.3390/ijms23062926] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 02/25/2022] [Accepted: 03/05/2022] [Indexed: 12/11/2022] Open
Abstract
African American (AA) men exhibit 1.6-fold higher prostate cancer (PCa) incidence and 2.4-fold higher mortality rates compared to European American (EA) men. In addition to socioeconomic factors, emerging evidence suggests that intrinsic biological differences may explain part of PCa disparities. In this study, we applied microRNA (miRNA)-driven bioinformatics to evaluate whether differential miRNA-mRNA regulatory networks play a role in promoting the AA PCa disparities. 10 differentially expressed miRNAs were imported to mirPath V.3 algorithm, leading to identification of 58 signaling pathways differentially regulated in AA PCa versus EA PCa. Among these pathways, we particularly focused on mTOR and VEGF signaling, where we identified 5 reciprocal miRNA-mRNA pairings: miR-34a-5p/HIF1A, miR-34a-5p/PIK3CB, miR-34a-5p/IGFBP2, miR-99b-5p/MTOR and miR-96-5p/MAPKAPK2 in AA PCa versus EA PCa. RT-qPCR validation confirmed that miR-34a-5p, miR-99b-5p and MAPKAPK2 were downregulated, while miR-96-5p, IGFBP2, HIF1A, PIK3CB and MTOR were upregulated in AA PCa versus EA PCa cells. Transfection of miRNA mimics/antagomir followed by RT-qPCR and Western blot analysis further verified that IGFBP2, HIF1A and PIK3CB are negatively regulated by miR-34a-5p, whereas MTOR and MAPKAPK2 are negatively regulated by miR-99b-5p and miR-96-5p, respectively, at mRNA and protein levels. Targeting reciprocal pairings by miR-34a-5p mimic, miR-99b-5p mimic or miR-96-5p antagomir downregulates HIF1α, PI3Kβ, mTOR, IGFBP2 but upregulates MAPKAPK2, subsequently reducing cell proliferation and sensitizing docetaxel-induced cytotoxicity in PCa cells. These results suggest that miRNA-mRNA regulatory network plays a critical role in AA PCa disparities, and targeting these core miRNA-mRNA pairings may reduce PCa aggressiveness and overcome the chemoresistance in AA patients.
Collapse
Affiliation(s)
- Himali Gujrati
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA; (H.G.); (S.H.)
| | - Siyoung Ha
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA; (H.G.); (S.H.)
| | - Azah Mohamed
- Toxicology Program, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA;
| | - Bi-Dar Wang
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA; (H.G.); (S.H.)
- Hormone Related Cancers Program, University of Maryland Greenebaum Comprehensive Cancer Center, Baltimore, MD 21201, USA
- Correspondence:
| |
Collapse
|
3
|
Snezhkina AV, Lukyanova EN, Fedorova MS, Kalinin DV, Melnikova NV, Stepanov OA, Kiseleva MV, Kaprin AD, Pudova EA, Kudryavtseva AV. Novel Genes Associated with the Development of Carotid Paragangliomas. Mol Biol 2019. [DOI: 10.1134/s0026893319040137] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
4
|
Harrison S, Lennon R, Holly J, Higgins JPT, Gardner M, Perks C, Gaunt T, Tan V, Borwick C, Emmet P, Jeffreys M, Northstone K, Rinaldi S, Thomas S, Turner SD, Pease A, Vilenchick V, Martin RM, Lewis SJ. Does milk intake promote prostate cancer initiation or progression via effects on insulin-like growth factors (IGFs)? A systematic review and meta-analysis. Cancer Causes Control 2017; 28:497-528. [PMID: 28361446 PMCID: PMC5400803 DOI: 10.1007/s10552-017-0883-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 03/10/2017] [Indexed: 01/03/2023]
Abstract
PURPOSE To establish whether the association between milk intake and prostate cancer operates via the insulin-like growth factor (IGF) pathway (including IGF-I, IGF-II, IGFBP-1, IGFBP-2, and IGFBP-3). METHODS Systematic review, collating data from all relevant studies examining associations of milk with IGF, and those examining associations of IGF with prostate cancer risk and progression. Data were extracted from experimental and observational studies conducted in either humans or animals, and analyzed using meta-analysis where possible, with summary data presented otherwise. RESULTS One hundred and seventy-two studies met the inclusion criteria: 31 examining the milk-IGF relationship; 132 examining the IGF-prostate cancer relationship in humans; and 10 animal studies examining the IGF-prostate cancer relationship. There was moderate evidence that circulating IGF-I and IGFBP-3 increase with milk (and dairy protein) intake (an estimated standardized effect size of 0.10 SD increase in IGF-I and 0.05 SD in IGFBP-3 per 1 SD increase in milk intake). There was moderate evidence that prostate cancer risk increased with IGF-I (Random effects meta-analysis OR per SD increase in IGF-I 1.09; 95% CI 1.03, 1.16; n = 51 studies) and decreased with IGFBP-3 (OR 0.90; 0.83, 0.98; n = 39 studies), but not with other growth factors. The IGFBP-3 -202A/C single nucleotide polymorphism was positively associated with prostate cancer (pooled OR for A/C vs. AA = 1.22; 95% CI 0.84, 1.79; OR for C/C vs. AA = 1.51; 1.03, 2.21, n = 8 studies). No strong associations were observed for IGF-II, IGFBP-1 or IGFBP-2 with either milk intake or prostate cancer risk. There was little consistency within the data extracted from the small number of animal studies. There was additional evidence to suggest that the suppression of IGF-II can reduce tumor size, and contradictory evidence with regards to the effect of IGFBP-3 suppression on tumor progression. CONCLUSION IGF-I is a potential mechanism underlying the observed associations between milk intake and prostate cancer risk.
Collapse
Affiliation(s)
- Sean Harrison
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
| | - Rosie Lennon
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Jeff Holly
- IGFs & Metabolic Endocrinology Group, School of Clinical Sciences at North Bristol, Southmead Hospital, BS10 5NB, Bristol, UK
| | - Julian P T Higgins
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
| | - Mike Gardner
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Claire Perks
- IGFs & Metabolic Endocrinology Group, School of Clinical Sciences at North Bristol, Southmead Hospital, BS10 5NB, Bristol, UK
| | - Tom Gaunt
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
| | - Vanessa Tan
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
| | - Cath Borwick
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- Cardiff University, Cardiff, UK
| | - Pauline Emmet
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Mona Jeffreys
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | | | - Sabina Rinaldi
- International Agency for Research on Cancer, Lyon, France
| | - Stephen Thomas
- School of Oral and Dental Sciences,, University of Bristol, Bristol, UK
| | | | - Anna Pease
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Vicky Vilenchick
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Richard M Martin
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK
- National Institute for Health Research Biomedical Research Unit in Nutrition, Diet and Lifestyle, University Hospitals Bristol NHS Foundation Trust and the University of Bristol, BS2 8AE, Bristol, UK
| | - Sarah J Lewis
- School of Social and Community Medicine, University of Bristol, Bristol, UK.
- MRC Integrative Epidemiology Unit (IEU), University of Bristol, Bristol, UK.
| |
Collapse
|
5
|
Insulin-like growth factor (IGF) axis in cancerogenesis. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2016; 772:78-104. [PMID: 28528692 DOI: 10.1016/j.mrrev.2016.08.007] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 08/27/2016] [Accepted: 08/31/2016] [Indexed: 12/21/2022]
Abstract
Determination of the role of insulin-like growth factor (IGF) family components in carcinogenesis of several human tumors is based on numerous epidemiological and pre-clinical studies, experiments in vivo and in vitro and on attempts at application of drugs affecting the IGF axis. Investigative hypotheses in original studies were based on biological functions manifested by the entire family of IGF (ligands, receptors, linking proteins, adaptor molecules). In the context of carcinogenesis the most important functions of IGF family involve intensification of proliferation and inhibition of cell apoptosis and effect on cell transformation through synthesis of several regulatory proteins. IGF axis controls survival and influences on metastases of cells. Interactions of IGF axis components may be of a direct or indirect nature. The direct effects are linked to activation of PI3K/Akt signaling pathway, in which the initiating role is first of all played by IGF-1 and IGF-1R. Activity of this signaling pathway leads to an increased mitogenesis, cell cycle progression, and protection against different apoptotic stresses. Indirect effects of the axis depend on interactions between IGF and other molecules important for cancer etiology (e.g. sex hormones, products of suppressor genes, viruses, and other GFs) and the style of life (nutrition, physical activity). From the clinical point of view, components of IGF system are first of all considered as diagnostic serous and/or tissue biomarkers of a given cancer, prognostic factors and attractive target of modern anti-tumor therapies. Several mechanisms in which IGF system components act in the process of carcinogenesis need to be clarified, mainly due to multifactorial etiology of the neoplasms. Pin-pointing of the role played in carcinogenesis by any single signaling pathway remains particularly difficult. The aim of this review is to summarize the current data of several epidemiological studies, experiments in vitro and on animal models, to increase our understanding of the complex role of IGF family components in the most common human cancers.
Collapse
|
6
|
Pickard A, McCance DJ. IGF-Binding Protein 2 - Oncogene or Tumor Suppressor? Front Endocrinol (Lausanne) 2015; 6:25. [PMID: 25774149 PMCID: PMC4343188 DOI: 10.3389/fendo.2015.00025] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 02/13/2015] [Indexed: 01/08/2023] Open
Abstract
The role of insulin-like growth factor binding protein 2 (IGFBP2) in cancer is unclear. In general, IGFBP2 is considered to be oncogenic and its expression is often observed to be elevated in cancer. However, there are a number of conflicting reports in vitro and in vivo where IGFBP2 acts in a tumor suppressor manner. In this mini-review, we discuss the factors influencing the variation in IGFBP2 expression in cancer and our interpretation of these findings.
Collapse
Affiliation(s)
- Adam Pickard
- Centre for Cancer Research and Cell Biology, Queen’s University, Belfast, UK
- *Correspondence: Adam Pickard, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, 97 Lisburn Road, Belfast BT7 9BL, UK e-mail:
| | - Dennis J. McCance
- Centre for Cancer Research and Cell Biology, Queen’s University, Belfast, UK
| |
Collapse
|
7
|
Fismen S, Thiyagarajan D, Seredkina N, Nielsen H, Jacobsen S, Elung-Jensen T, Kamper AL, Johansen SD, Mortensen ES, Rekvig OP. Impact of the tumor necrosis factor receptor-associated protein 1 (Trap1) on renal DNaseI shutdown and on progression of murine and human lupus nephritis. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 182:688-700. [PMID: 23273922 DOI: 10.1016/j.ajpath.2012.11.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 10/23/2012] [Accepted: 11/07/2012] [Indexed: 01/22/2023]
Abstract
Recent findings show that transformation of mild glomerulonephritis into end-stage disease coincides with shutdown of renal DNaseI expression in (NZBxNZW)F1 mice. Down-regulation of DNaseI results in reduced chromatin fragmentation and deposition of extracellular chromatin fragments in glomerular basement membranes where they appear in complex with IgG antibodies. Here, we implicate the anti-apoptotic and survival protein, tumor necrosis factor receptor-associated protein 1 (Trap1) in the disease process, based on the observation that annotated transcripts from this gene overlap with transcripts from the DNaseI gene. Furthermore, we translate these observations to human lupus nephritis. In this study, mouse and human DNaseI and Trap1 mRNA levels were determined by real-time quantitative PCR and compared with protein expression levels and clinical data. Cellular localization was analyzed by immune electron microscopy, IHC, and in situ hybridization. Data indicate that silencing of DNaseI gene expression correlates inversely with expression of the Trap1 gene. Our observations suggest that the mouse model is relevant for the aspects of disease progression in human lupus nephritis. Acquired silencing of the renal DNaseI gene has been shown to be important for progression of disease in both the murine and human forms of lupus nephritis. Early mesangial nephritis initiates a cascade of inflammatory signals that lead to up-regulation of Trap1 and a consequent down-regulation of renal DNaseI by transcriptional interference.
Collapse
Affiliation(s)
- Silje Fismen
- Molecular Pathology Research Group, Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Egevad L, Mazzucchelli R, Montironi R. Implications of the International Society of Urological Pathology modified Gleason grading system. Arch Pathol Lab Med 2012; 136:426-34. [PMID: 22458905 DOI: 10.5858/arpa.2011-0495-ra] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT Histologic grading is the clinically most useful tissue-based predictor of prognosis for prostate cancer. Over the years, there has been a gradual shift in how the Gleason grading is applied in practice, with a general trend toward upgrading. A consensus conference was organized in 2005 by the International Society of Urological Pathology (ISUP) for standardizing both the perception of histologic patterns and how the grade information is compiled and reported. OBJECTIVE To review the implications of the ISUP modified Gleason grading system. DATA SOURCES Personal experience and review of the current literature. CONCLUSIONS The recommendations regarding pattern interpretation and reporting are summarized. The practical consequences of the ISUP modification of the Gleason grading are reported. The prognostic importance of the Gleason score, its reproducibility, and its preoperative assessment are discussed. Subsequent proposals for slight modifications to the ISUP grading system are described.
Collapse
Affiliation(s)
- Lars Egevad
- Department of Pathology, Karolinska University Hospital, Stockholm, Sweden
| | | | | |
Collapse
|
9
|
|
10
|
Seredkina N, Rekvig OP. Acquired loss of renal nuclease activity is restricted to DNaseI and is an organ-selective feature in murine lupus nephritis. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:1120-8. [PMID: 21723244 DOI: 10.1016/j.ajpath.2011.05.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Revised: 04/27/2011] [Accepted: 05/04/2011] [Indexed: 12/18/2022]
Abstract
An acquired loss of renal DNaseI promotes transformation of mild mesangial lupus nephritis into membranoproliferative end-stage organ disease. In this study, we analyzed expression profiles of DNaseI in other organs of lupus-prone (NZB×NZW)F1 mice during disease progression to determine whether silencing of the renal DNaseI gene is an organ-specific feature or whether loss of DNaseI reflects a systemic error in mice with sever lupus nephritis. The present results demonstrate normal or elevated levels of DNaseI mRNA and enzyme activity in liver, spleen, and serum samples from (NZB×NZW)F1 mice throughout all the stages of lupus nephritis. DNaseI activity was dramatically reduced only in kidneys of mice with sever nephritis and was the only nuclease that was down-regulated, whereas six other nucleases (DNaseII1 to 3, caspase-activated DNase, Dnase2a, and endonuclease G) were approximately normally expressed in kidneys, liver, and spleen. Loss of renal DNaseI was not accompanied by changes in serum DNaseI activity, suggesting independent mechanisms of DNaseI regulation in circulation and in kidneys and an absence of compensatory up-regulation of serum DNaseI activity in the case of renal DNaseI deficiency. Thus, silencing of renal DNaseI is a unique renal feature in membranoproliferative lupus nephritis. Determining the mechanism(s) responsible for DNaseI down-regulation might lead to the generation of new therapeutic targets to treat and prevent progressive lupus nephritis.
Collapse
Affiliation(s)
- Natalya Seredkina
- Molecular Pathology Research Group, Institute of Medical Biology, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway
| | | |
Collapse
|
11
|
Yatabe Y, Borczuk AC, Powell CA. Do all lung adenocarcinomas follow a stepwise progression? Lung Cancer 2011; 74:7-11. [PMID: 21705107 DOI: 10.1016/j.lungcan.2011.05.021] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 05/19/2011] [Accepted: 05/23/2011] [Indexed: 01/15/2023]
Abstract
Similar to the adenoma-carcinoma sequence of colorectal cancer, lung adenocarcinoma is thought to follow a linear multistep progression, in which a precursor lesion progresses to adenocarcinoma in situ, which is followed by invasive adenocarcinoma. However, lung adenocarcinoma can no longer be considered as a single type of tumor but rather a group of distinct subsets of tumors that arise from different molecular pathways. Consistent with this concept, recent findings revealed that this linear progression might not occur in all lung adenocarcinomas. First, according to the molecular classification based on expression profiling, lung cancer can be divided into at least two subsets; precancerous and in situ lesions share characteristics of molecular expression and clinical features with only one of the two subsets, suggesting that the linear progression is only applicable to the subset in the molecular classification. Second, when EGFR and KRAS were examined based on the progression steps, the mutation rate of KRAS was disproportionally distributed; however, according to the progression schema, gene alterations should be evenly accumulated along the entire progression. Third, by means of comparative genomic hybridization analysis, some adenocarcinoma in situ revealed gene alterations discontinuous to invasive adenocarcinoma. Finally, there were some clinical observations that support that some lesions escape from the progression. In this review, we hypothesize a novel scenario for the progression of lung adenocarcinoma, which does not support a linear progression schema.
Collapse
Affiliation(s)
- Yasushi Yatabe
- Department of Pathology and Molecular Diagnostics, Aichi Cancer Center, 1-1 Kanokoden, Chikusa-ku, Nagoya 464-8681, Japan.
| | | | | |
Collapse
|
12
|
Mireuta M, Darnel A, Pollak M. IGFBP-2 expression in MCF-7 cells is regulated by the PI3K/AKT/mTOR pathway through Sp1-induced increase in transcription. Growth Factors 2010; 28:243-55. [PMID: 20370577 DOI: 10.3109/08977191003745472] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Insulin-like growth factor binding protein 2 (IGFBP-2) has been implicated in the pathophysiology of neoplasia. The PI3K/AKT/mTOR pathway has recently been shown to be a predominant regulator of IGFBP-2 at the protein level in MCF-7 breast cancer cells. However, there are gaps in knowledge with respect to the molecular mechanisms that underlie this regulation. Here, we show that the PI3K/AKT/mTOR pathway regulates IGFBP-2 protein levels by modulating IGFBP-2 mRNA abundance in MCF-7 cells. This change is achieved by regulating transcription through a critical region present in the first 200 bp upstream of the transcription initiation site where Sp1 transcription factor binds and drives transcription. IGF-1 treatment leads to increased nuclear abundance of Sp1 and increased IGFBP-2 mRNA and protein levels. Rapamycin and LY294002 induce a decline in Sp1 nuclear abundance and IGFBP-2 mRNA and protein levels. This work provides a mechanistic explanation for the observed effects of the PI3K/AKT/mTOR pathway on IGFBP-2 levels in MCF-7 cells.
Collapse
Affiliation(s)
- Matei Mireuta
- Departments of Medicine and Oncology, Lady Davis Institute for Medical Research, Montreal SMBD Jewish General Hospital, and McGill University, Montreal, Quebec, CanadaH3T 1E2
| | | | | |
Collapse
|
13
|
Marucci G, Morandi L, Magrini E, Farnedi A, Franceschi E, Miglio R, Calò D, Pession A, Foschini MP, Eusebi V. Gene expression profiling in glioblastoma and immunohistochemical evaluation of IGFBP-2 and CDC20. Virchows Arch 2008; 453:599-609. [PMID: 18953566 DOI: 10.1007/s00428-008-0685-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 09/29/2008] [Accepted: 10/06/2008] [Indexed: 01/17/2023]
Abstract
Thirty-nine glial tumours (28 glioblastomas (GB) and 11 low-grade gliomas) were investigated with DNA microarrays to reveal a possible specific gene expression profile. Unsupervised classification through hierarchical cluster analysis identified two groups of tumours, the first composed of low-grade gliomas and the second mainly composed of GB. Nine genes were identified as most informative: seven were over-expressed in low-grade gliomas and under-expressed in GB; on the contrary, two genes, insulin-like growth factor binding protein 2 (IGFBP-2) and cell division cycle 20 homologue (CDC20), were over-expressed in GB and under-expressed in low-grade tumours. This same genetic profile was confirmed by reverse transcriptase polymerase chain reaction. Immunohistochemistry for IGFBP-2 was positive in 88.8% of the cases of GB and in only one low-grade glioma, whilst CDC20 immunostained 74.1% of the cases of GB and none low-grade glioma. This was confirmed in an additional series of cases studied with immunohistochemistry only. In conclusion, over-expression of mRNA levels of IGFBP-2 and CDC20 is highly related to GB, IGFBP-2 and CDC-20 gene and protein expressions are strongly correlated, and IGFBP-2 and CDC20 immunopositivity can be useful for the identification of GB in small biopsies.
Collapse
Affiliation(s)
- Gianluca Marucci
- Section of Pathology, Bellaria Hospital, University of Bologna, Bologna, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Becher OJ, Peterson KM, Khatua S, Santi MR, MacDonald TJ. IGFBP2 is overexpressed by pediatric malignant astrocytomas and induces the repair enzyme DNA-PK. J Child Neurol 2008; 23:1205-13. [PMID: 18952587 PMCID: PMC3674842 DOI: 10.1177/0883073808321766] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
To identify targets critical to malignant childhood astrocytoma, we compared the expression of receptor tyrosine kinase- associated genes between low-grade and high-grade pediatric astrocytomas. The highest differentially overexpressed gene in high-grade astrocytoma is insulin-like growth factor- binding protein-2 (P = .0006). Immunohistochemistry confirmed overexpression of insulin-like growth factor-binding protein-2 protein (P = .027). Insulin-like growth factor- binding protein-2 stimulation had no effect on astrocytoma cell growth and migration, and minimally inhibited insulin-like growth factor-1-mediated migration, but not insulin-like growth factor-2-mediated migration. However, insulin-like growth factor-binding protein-2 stimulation significantly upregulated the major DNA repair enzyme gene, DNA-PKcs, and induced DNA-dependent protein kinase catalytic subunit protein expression in a time-dependent and dose-dependent manner, whereas insulin-like growth factor-1 had no effect. DNA-PKcs is also highly overexpressed by high-grade astrocytomas. These findings suggest insulin-like growth factor-binding protein-2 plays a role in astrocytoma progression by promoting DNA-damage repair and therapeutic resistance.
Collapse
Affiliation(s)
- Oren J. Becher
- Center for Cancer and Immunology Research, Children's Research Institute, Washington DC
| | - Katia M. Peterson
- Center for Cancer and Immunology Research, Children's Research Institute, Washington DC
| | - Soumen Khatua
- Center for Cancer and Immunology Research, Children's Research Institute, Washington DC
| | - Maria R. Santi
- Department of Pathology (M.R.S.), Children's National Medical Center, Washington DC
| | - Tobey J. MacDonald
- Center for Cancer and Immunology Research, Children's Research Institute, Washington DC
| |
Collapse
|
15
|
Halvorsen OJ. Molecular and prognostic markers in prostate cancer. APMIS 2008. [DOI: 10.1111/j.1600-0463.2008.0s123.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
16
|
Abstract
Tissue microarrays (TMAs) offer the potential to rapidly translate genomics and basic science research findings to practical clinical application. This is particularly true in the field of cancer biomarker research, where TMAs can be used for candidate biomarker validation and association with patient clinical, pathologic, and outcomes parameters. In this review, we examine the effect of TMA use on prostate cancer biomarker research, focusing on the types of TMAs that have been used, and the biomarkers that have been examined. The results demonstrate that TMAs have been very effective in screening candidate biomarkers for subsequent, extended evaluation in large patient populations. In addition, the use of TMAs in multiple biomarker series allows for the statistical analysis of sets of biomarkers as diagnostic or prognostic tests. The processes used here can be applied to any tumor type to improve patient diagnosis, prognosis, and treatment response prediction.
Collapse
|
17
|
Flaig TW, Nordeen SK, Lucia MS, Harrison GS, Glodé LM. Conference report and review: current status of biomarkers potentially associated with prostate cancer outcomes. J Urol 2007; 177:1229-37. [PMID: 17382696 DOI: 10.1016/j.juro.2006.11.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2006] [Indexed: 11/19/2022]
Abstract
PURPOSE The use of prostate specific antigen screening to diagnose and monitor prostate cancer is associated with well-known shortcomings. A 2-day Prostate Cancer Biomarker Conference was convened to identify promising areas of research and focus efforts on the most critical needs. MATERIALS AND METHODS The conference provided a forum for the presentation and discussion of ongoing prostate cancer biomarker research. This meeting also sought to identify a range of critical issues in the development and validation of biomarkers, foster research collaboration between groups representing government, academic and industry initiatives, and coordinate efforts with planned and ongoing clinical trials. RESULTS Taken collectively the conference presentations offered various new technologies for biomarker discovery and pathological assessment of clinical disease as well as the promise of biomarkers for improving prostate cancer diagnosis and treatment decisions. However, research efforts focused on biomarker validation and implementation clearly lag behind those directed toward initial biomarker discovery. It is apparent that guidelines are desperately needed to ensure the consistency of sample collection across institutions. CONCLUSIONS Several ongoing and planned adjuvant prostate cancer trials will provide a tremendous opportunity for biological sample collection along with the potential to validate many biomarkers. Practicing urologists have an opportunity to have a critical role in the successful accrual of patients into these trials.
Collapse
Affiliation(s)
- Thomas W Flaig
- Department of Medicine, University of Colorado at Denver and Health Sciences University Denver, Aurora, Colorado 80045, USA.
| | | | | | | | | |
Collapse
|
18
|
Suzuki A, Urushitani H, Watanabe H, Sato T, Iguchi T, Kobayashi T, Ohta Y. Comparison of Estrogen Responsive Genes in the Mouse Uterus, Vagina and Mammary Gland. J Vet Med Sci 2007; 69:725-31. [PMID: 17675804 DOI: 10.1292/jvms.69.725] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Female reproductive organs are mainly regulated by estrogen and progesterone. Specifically, the uterus, vagina and mammary gland show organ-specific mitosis and morphological changes during proliferative events, such as estrous cycle, gestation and lactation. The mechanism underlying these organ-specific estrogen-dependent events is still unknown. We examined, therefore, global gene expression in the mature uterus, vagina and mammary gland of ovariectomized adult mice 6 hr after an injection of 5 microg/kg 17beta-estradiol (E2) using a microarray method in order to identify primary E2-responsive genes. Half of the E2 up-regulated genes in the uterus were similar to those in the vagina. E2 up-regulated the expression of Insulin-like growth factor 1 (Igf-1) genes in the uterus and vagina. In the vagina, E2 up-regulated the expression of IGF binding proteins (Igfbp2 and Igfbp5). In the mammary gland, unlike the uterus and vagina, no gene showed altered expression 6 hr after the E2 exposure. These results suggest that expression of Igf-1 and morphogenesis genes is regulated by E2 in an organ-specific manner, and it is supported by the results of BrdU labeling showing E2-induced mitosis in the uterus and vagina except the mammary gland. The differences in organ specificity in response to E2 may be attributed by differences in gene expression regulated by E2 in female reproductive organs. The candidate estrogen-responsive genes in the uterus and vagina identified by profiling provide an important foundation understanding functional mechanisms of estrogen regulating morphogenesis and maintenance of each reproductive organ.
Collapse
Affiliation(s)
- Atsuko Suzuki
- The United Graduate School of Veterinary Science, Yamaguchi University, 1677-1 Yoshida 753-8515, Japan
| | | | | | | | | | | | | |
Collapse
|
19
|
Zhang L, Huang W, Chen J, Zhou X, Lu Z, Zhou H. Expression of IGFBP2 in gastric carcinoma and relationship with clinicopathologic parameters and cell proliferation. Dig Dis Sci 2007; 52:248-53. [PMID: 17171534 DOI: 10.1007/s10620-006-9358-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2005] [Accepted: 03/28/2006] [Indexed: 12/23/2022]
Abstract
The insulin-like growth factor (IGF) axis is a complex system composed of two mitogenic ligands, IGF-I and IGF-II, two receptors, IGF-IR and IGF-IIR, and six binding proteins, IGFBP1 to IGFBP6. The IGFBPs exert their actions through their regulation of IGF bioavailability for IGF receptors. The present study evaluated the correlation between IGFBP2 expression and clinicopathologic parameters and cell proliferation in cancer by using surgically resected tissue specimens from 97 patients with gastric carcinoma treated at our hospital. Immunohistochemical staining was performed using IGFBP2 and Ki-67 monoclonal antibody. An obvious difference existed in the IGFBP2 expression between carcinomas and normal mucosa. Correlation between IGFBP2 expression and the depth of penetration, lymph node metastasis, and clinical stage were observed. There was positive correlation between IGFBP2 expression and Ki-67 expression. We conclude that IGFBP2 may be involved in carcinogenesis and progression of gastric carcinoma by promoting cell proliferation.
Collapse
Affiliation(s)
- Lihua Zhang
- Department of Pathology, Jinling Hospital, Clinical School of Medical College of Nanjing University, Nanjing, P.R. China, 210002
| | | | | | | | | | | |
Collapse
|
20
|
Shi LH, Zhu XQ, Zhao GH, Xia YB, Zhang YS. Expression of insulin-like growth factor binding protein-2 in gastric carcinoma and its relationship with cell proliferation. World J Gastroenterol 2006; 12:6285-9. [PMID: 17072950 PMCID: PMC4088135 DOI: 10.3748/wjg.v12.i39.6285] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
AIM: To investigate the expression of insulin-like growth factor binding protein-2 (IGFBP-2) in gastric carcinoma and its clinical significance and to explore its relationship with cell proliferation.
METHODS: Expressions of IGFBP-2 and Ki-67 in 118 cases of gastric carcinoma and 40 cases of normal gastric mucosa were detected by EnVision immunohistochemical technique.
RESULTS: Expression of IGFBP-2 in gastric carcinoma was higher than that in normal gastric mucosa (P < 0.01). There was no difference between high- and low-grade gastric carcinoma (P > 0.05). Expression of IGFBP-2 in advanced gastric carcinoma was higher than that in early gastric carcinoma (P < 0.05). Expression of IGFBP-2 in gastric carcinoma with lymph node metastasis was higher than that without lymph node metastasis (P < 0.01). IGFBP-2 expression was a positively related to the clinical stage of gastric carcinoma (P < 0.01). There was a positive correlation between IGFBP-2 and Ki-67 (P < 0.05).
CONCLUSION: IGFBP-2 may be involved in carcino-genesis and progression of gastric carcinoma by promoting cell proliferation.
Collapse
Affiliation(s)
- Liang-Hui Shi
- Department of Surgery, Affiliated Yijishan Hospital, Wannan Medical College, Wuhu 241001, Anhui Province, China.
| | | | | | | | | |
Collapse
|
21
|
Kojima S, Mulholland DJ, Ettinger S, Fazli L, Nelson CC, Gleave ME. Differential regulation of IGFBP-3 by the androgen receptor in the lineage-related androgen-dependent LNCaP and androgen-independent C4-2 prostate cancer models. Prostate 2006; 66:971-86. [PMID: 16541420 DOI: 10.1002/pros.20420] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Despite evidence implicating insulin-like growth factor binding protein-3 (IGFBP-3) as a growth inhibitor of prostate cancer (CaP), little is known about changes in its regulation and function during progression to androgen independence. METHODS The expression levels of IGFBP-3 were determined by cDNA microarray analysis and tissue microarrays (TMAs) after androgen ablations. LNCaP (LN-BP3) and C4-2 (C4-2-BP3) sublines were used to compare the apoptotic effects of IGFBP-3 in LNCaP (androgen-dependent) and C4-2 (androgen-independent) cells. RESULTS After androgen deprivation, IGFBP-3 mRNA levels increased more in C4-2 compared to LNCaP cells. Androgens suppressed IGFBP-3 levels in a dose-dependent manner in LNCaP and C4-2 cell. IGFBP-3 expression was increased after NHT in human CaP tissues. Apoptotic rates increased in LN-BP3, but not C4-2-BP3 cells, following doxycycline-mediated IGFBP-3 induction. CONCLUSIONS C4-2 cell survival in an androgen-depleted environment may be facilitated through differential resistance to the apoptotic effects elicited by IGFBP-3.
Collapse
MESH Headings
- Androgens/pharmacology
- Androgens/physiology
- Apoptosis/genetics
- Apoptosis/physiology
- Cell Line, Tumor
- Cell Lineage
- Cell Survival
- Disease Progression
- Dose-Response Relationship, Drug
- Doxycycline/pharmacology
- Gene Expression Regulation, Neoplastic/drug effects
- Gene Expression Regulation, Neoplastic/physiology
- Humans
- Insulin-Like Growth Factor Binding Protein 3/genetics
- Insulin-Like Growth Factor Binding Protein 3/physiology
- Male
- Neoplasms, Hormone-Dependent/chemistry
- Neoplasms, Hormone-Dependent/genetics
- Neoplasms, Hormone-Dependent/pathology
- Oligonucleotide Array Sequence Analysis
- Prostatic Neoplasms/chemistry
- Prostatic Neoplasms/genetics
- Prostatic Neoplasms/pathology
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- Receptors, Androgen/physiology
Collapse
Affiliation(s)
- Satoko Kojima
- The Prostate Centre, Vancouver General Hospital, Vancouver, British Columbia, Canada
| | | | | | | | | | | |
Collapse
|
22
|
Le H, Arnold JT, McFann KK, Blackman MR. DHT and testosterone, but not DHEA or E2, differentially modulate IGF-I, IGFBP-2, and IGFBP-3 in human prostatic stromal cells. Am J Physiol Endocrinol Metab 2006; 290:E952-60. [PMID: 16368782 DOI: 10.1152/ajpendo.00451.2005] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Prostate cancer is one of the four most common cancers in the United States, affecting one of six men. Increased serum levels of androgens and IGF-I are associated with an augmented risk of prostate cancer. Dihydrotestosterone (DHT) and testosterone (T) stimulate prostate cancer cell growth, development, and function, whereas the effects of DHT and T in prostate stromal cells, and of dehydroepiandrosterone (DHEA) in prostate cancer or stromal cells, are uncertain. We investigated the actions of DHT, T, DHEA, and estradiol (E2) on insulin-like growth factor (IGF)-I, IGF-II, IGF-I receptor (R), IGF-binding protein (IGFBP)-2, IGFBP-3, and IGFBP-5 in primary cultures of human prostatic stromal cells by assessing cell proliferation, mRNA expression, and protein secretion by MTT growth assay, quantitative real-time PCR, and ELISA, respectively. DHT and T each increased IGF-I (7-fold) and decreased IGFBP-3 (2-fold) mRNA expression and protein secretion in a dose- and time-dependent manner and increased IGFBP-2 (2-fold) mRNA in a dose- and time-dependent manner. DHEA and E2 did not significantly alter these measures. Flutamide abolished the DHT-modulated increases in IGF-I and IGFBP-2, suggesting that the influences of DHT and T on these measures were androgen receptor mediated. None of the four steroids significantly affected IGF-IR, IGF-II, or IGFBP-5 mRNA levels or stromal cell proliferation. The effects of DHT on IGF-I, IGFBP-2, and IGFBP-3 were more pronounced in stromal cultures that did not express desmin. These data suggest that DHT and T promote prostate growth partly via modulation of the stromal cell IGF axis, with potential paracrine effects on prostate epithelial cells.
Collapse
Affiliation(s)
- Hanh Le
- Endocrine Section, LCI, DIR, NCCAM, 9 Memorial Dr., Bethesda, MD 20892-0933, USA
| | | | | | | |
Collapse
|
23
|
Wang GK, Hu L, Fuller GN, Zhang W. An interaction between insulin-like growth factor-binding protein 2 (IGFBP2) and integrin alpha5 is essential for IGFBP2-induced cell mobility. J Biol Chem 2006; 281:14085-91. [PMID: 16569642 DOI: 10.1074/jbc.m513686200] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In the study we report here, we tested the hypothesis that insulin-like growth factor-binding protein 2 (IGFBP2) promotes cell mobility through its interaction with integrin alpha5. Our previous microarray studies showed that IGFBP2 activates the expression of integrin alpha5. In addition, IGFBP2 has an Arg-Gly-Asp (RGD) domain, which is a known integrin binding motif. We first confirmed our microarray results by showing that the expression of integrin alpha5 is indeed up-regulated at the protein level in IGFBP2-overexpressing SNB19 glioma cells. Using co-immunoprecipitation, we confirmed that IGFBP2 does interact with integrin alpha5. To confirm that IGFBP2 interacts directly with integrin alpha5 through the RGD domain, we created an RGD --> RGE mutant (D306E) IGFBP2 and stably overexpressed the mutant IGFBP2 in the same cell line. Co-immunoprecipitation then showed that D306E-IGFBP2 had no detectable binding with integrin alpha5. We further observed that IGFBP2-overexpressing cells have extensive cell surface lamellipodia, whereas D306E-IGFBP2-overexpressing cells show abundant cell surface focal adhesions. Consistent with this, phenotype analysis then showed that IGFBP2-overexpressing cells have elevated migration rates compared with vector control; in contrast, the migration rates of the D306E-IGFBP2-overexpressing cells were not elevated and were comparable with that of vector control. Decreased expression of integrin alpha5 by small interference RNA in IGFBP2-overexpressing cells also reduced cell mobility. Therefore, we have concluded that one mechanism by which IGFBP2 activates IGFBP2-induced cell mobility is through its interaction with integrin alpha5 and this interaction is specifically mediated through the RGD domain on IGFBP2.
Collapse
Affiliation(s)
- George K Wang
- Department of Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA
| | | | | | | |
Collapse
|
24
|
Zhou YH, Hess KR, Liu L, Linskey ME, Yung WKA. Modeling prognosis for patients with malignant astrocytic gliomas: quantifying the expression of multiple genetic markers and clinical variables. Neuro Oncol 2005; 7:485-94. [PMID: 16212813 PMCID: PMC1871729 DOI: 10.1215/s1152851704000730] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The disparate lengths of survival among patients with malignant astrocytic gliomas (anaplastic astrocytomas [AAs] and glioblastoma multiforme [GBM]) cannot be adequately accounted for by clinical variables (patient age, histology, and recurrent status). Using real-time quantitative reverse transcription-polymerase chain reaction, we quantified the expression of four genes that were putative prognostic markers (CDK4, IGFBP2, MMP2, and RPS9) in a set of 43 AAs, 41 GBMs, and seven adjacent normal brain tissues. We previously explicated the expression and prognostic value of PAX6, PTEN, VEGF, and EGFR in these glioma tissues and established a comprehensive prognostic model (Zhou et al., 2003). This study attempts to improve that model by including four additional genetic markers, which exhibited a differential expression (P < 0.001) among tumor grades and between tumor and normal tissues. By including eight log-scaled gene expression variables, three clinical variables, and interaction terms among the eight genes, we established a prognostic model that accounted for two thirds of the variation (R2) in survival for this set of patients. To improve the R2 of the model without compromising its clinical utility, our data demonstrated that incorporating genes from different pathways markedly strengthens the model. Spearman rank correlation analysis of gene expression demonstrated a statistically significant positive correlation (P < 0.01) between the expression of IGFBP2-MMP2 and IGFBP2-VEGF in GBMs, but not in AAs. This finding suggests that the expression of IGFBP2 is associated with pathways activated specifically in GBMs that result in enhancing invasiveness and angiogenesis.
Collapse
Affiliation(s)
- Yi-Hong Zhou
- Department of Neurobiology and Developmental Sciences, Arkansas Cancer Research Center, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | | | | | | | | |
Collapse
|
25
|
Levitt RJ, Georgescu MM, Pollak M. PTEN-induction in U251 glioma cells decreases the expression of insulin-like growth factor binding protein-2. Biochem Biophys Res Commun 2005; 336:1056-61. [PMID: 16154532 DOI: 10.1016/j.bbrc.2005.08.229] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2005] [Accepted: 08/16/2005] [Indexed: 11/26/2022]
Abstract
PTEN is a tumor suppressor gene whose loss of function is observed in approximately 40-50% of human cancers. Although insulin-like growth factor binding protein-2 (IGFBP-2) was classically described as a growth inhibitor, multiple recent reports have shown an association of overexpression and/or high serum levels of IGFBP-2 with poor prognosis of several malignancies, including gliomas. Using an inducible PTEN expression system in the PTEN-null glioma cell line U251, we demonstrate that PTEN-induction is associated with reduced proliferation, increased apoptosis, and a substantial reduction of the high levels of IGFBP-2 expression. The PTEN-induced decrease in IGFBP-2 expression could be mimicked with the PI3-kinase inhibitor LY294002, indicating that the lipid phosphatase activity of PTEN is responsible for the observed effect. However, the rapamycin analog CCI-779 did not affect IGFBP-2 expression, suggesting that the PTEN-induced decrease in IGFBP-2 expression is not attributable to decreased mTOR signalling. Recombinant human IGFBP-2 was unable to rescue U251-PTEN cells from the antiproliferative effects of PTEN, and IGFBP-2 siRNA did not affect the IGF-dependent or -independent growth of this cell line. These results suggest that the clinical data linking IGFBP-2 expression to poor prognosis may arise, at least in part, because high levels of IGFBP-2 expression correlate with loss of function of PTEN, which is well known to lead to aggressive behavior of gliomas. Our results motivate translational research regarding the relationship between IGFBP-2 expression and loss of function of PTEN.
Collapse
Affiliation(s)
- Randy J Levitt
- Lady Davis Institute for Medical Research, Jewish General Hospital, Department of Medicine, Division of Experimental Medicine, McGill University, Montreal, Que., Canada
| | | | | |
Collapse
|
26
|
Busund LT, Richardsen E, Busund R, Ukkonen T, Bjørnsen T, Busch C, Stalsberg H. Significant expression of IGFBP2 in breast cancer compared with benign lesions. J Clin Pathol 2005; 58:361-6. [PMID: 15790698 PMCID: PMC1770626 DOI: 10.1136/jcp.2004.020834] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND/AIM Insulin-like growth factors (IGFs) and IGF binding proteins (IGFBPs) play a role in the normal development of breast tissue, and possibly in breast cancer aetiology. IGFBP2, one of six members of the IGFBP superfamily, acts as regulator of the IGFs and has pleiotropic effects in normal and neoplastic tissues. Because IGFs have mitogenic effects on mammary epithelia, this study investigated IGFBP2 expression in mammary tissues of different benign and malignant entities. METHODS Immunohistochemistry was used to study correlations between the presence and intensity of IGFBP2 staining and tumour type and grade, in addition to steroid hormone receptor status, in 120 breast specimens. Expression was measured by quantitative colour video image analysis and semiquantitative evaluation, and the measurements correlated well (r = 0.92; p<0.05). RESULTS Both methods found no significant expression of IGFBP2 in normal glandular cells and hyperplasia (group I). Atypical hyperplasia showed a slightly increased cytoplasmic expression of IGFBP2, and carcinoma in situ showed a distinctive, membrane associated and cytoplasmic expression (group II). Infiltrating carcinomas strongly expressed cytoplasmic IGFBP2 (group III). There were significant differences between group I and II, and between group II and III. There were no significant differences between invasive lobular and invasive ductal carcinoma, or between grades I, II, and III within these entities. There was no significant correlation between IGFBP2 immunostaining and oestrogen or progesterone receptor positivity within the malignant group. CONCLUSIONS IGFBP2 mitogenic signals of autocrine/paracrine regulatory mechanisms may be responsible for the growth of breast carcinomas and IGFBP2 may be an independent indicator of malignancy.
Collapse
Affiliation(s)
- L-T Busund
- Department of Morphology, Institute of Medical Biology, University of Tromsø, N-9037 Tromsø, Norway.
| | | | | | | | | | | | | |
Collapse
|
27
|
Neuvians TP, Gashaw I, Hasenfus A, Häcker A, Winterhager E, Grobholz R. Differential expression of IGF components and insulin receptor isoforms in human seminoma versus normal testicular tissue. Neoplasia 2005; 7:446-56. [PMID: 15967097 PMCID: PMC1501162 DOI: 10.1593/neo.04643] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2004] [Revised: 12/15/2004] [Accepted: 01/04/2005] [Indexed: 11/18/2022]
Abstract
Insulin-like growth factors (IGF) have mitogenic and antiapoptotic functions, and may be involved in tumor growth. The purpose of the study was to investigate the role of IGF components in seminoma compared to normal testis. Normal testicular tissues from autopsy cases and seminoma from surgery cases were obtained for microarray and real-time reverse transcription polymerase chain reaction (RT-PCR) analysis of IGF-1, IGF-2, IGF receptor type 1 (IGF-R1), IGF-R2, insulin receptor isoforms A (IR-A) and B (IR-B), and IGF-binding proteins (IGFBP) 1-6. IGF-2 was localized by immunohistochemistry. IGFBP-5 protein expression was evaluated by Western blot analysis. mRNA expression in microarray and real-time RT-PCR showed similar tendencies: IGF-1, IGF-R1, IGF-R2, IR-A, and IGFBP-2 were not different in both groups. IGF-2, IR-B, IGFBP-1, IGFBP-4, and IGFBP-6 mRNA were downregulated in seminoma. IGFBP-3 tended to be upregulated in pT1 seminoma, but downregulated in pT2 stages. IGFBP-5 and IGF-2 protein expression correlated with mRNA expression. In conclusion, downregulation of mainly inhibiting IGFBPs may allow a stimulated tumor growth. The downregulated IGF-2 does not seem to be involved in the growth regulation of seminoma. Constantly expressed genes (e.g., IGF-1, IGF-R1, IR-A, and IGFBP-2) may reflect an involvement in spermatogenesis, but may also play a major role in tumor growth as their expression is not downregulated despite the lack of spermatogenesis in tumor tissue.
Collapse
Affiliation(s)
- Tanja Pascale Neuvians
- Department of Pathology, University Hospital Mannheim, Ruprecht-Karls-University Heidelberg, Mannheim, Germany
| | - Isabella Gashaw
- Institute of Anatomy, University Hospital Essen, Essen, Germany
| | - Andrea Hasenfus
- Department of Pathology, University Hospital Mannheim, Ruprecht-Karls-University Heidelberg, Mannheim, Germany
| | - Axel Häcker
- Department of Urology, University Hospital Mannheim, Ruprecht-Karls-University Heidelberg, Mannheim, Germany
| | | | - Rainer Grobholz
- Department of Pathology, University Hospital Mannheim, Ruprecht-Karls-University Heidelberg, Mannheim, Germany
| |
Collapse
|
28
|
Lee EJ, Mircean C, Shmulevich I, Wang H, Liu J, Niemistö A, Kavanagh JJ, Lee JH, Zhang W. Insulin-like growth factor binding protein 2 promotes ovarian cancer cell invasion. Mol Cancer 2005; 4:7. [PMID: 15686601 PMCID: PMC549074 DOI: 10.1186/1476-4598-4-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2004] [Accepted: 02/02/2005] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Insulin-like growth factor binding protein 2 (IGFBP2) is overexpressed in ovarian malignant tissues and in the serum and cystic fluid of ovarian cancer patients, suggesting an important role of IGFBP2 in the biology of ovarian cancer. The purpose of this study was to assess the role of increased IGFBP2 in ovarian cancer cells. RESULTS Using western blotting and tissue microarray analyses, we showed that IGFBP2 was frequently overexpressed in ovarian carcinomas compared with normal ovarian tissues. Furthermore, IGFBP2 was significantly overexpressed in invasive serous ovarian carcinomas compared with borderline serous ovarian tumors. To test whether increased IGFBP2 contributes to the highly invasive nature of ovarian cancer cells, we generated IGFBP2-overexpressing cells from an SKOV3 ovarian cancer cell line, which has a very low level of endogenous IGFBP2. A Matrigel invasion assay showed that these IGFBP2-overexpressing cells were more invasive than the control cells. We then designed small interference RNA (siRNA) molecules that attenuated IGFBP2 expression in PA-1 ovarian cancer cells, which have a high level of endogenous IGFBP2. The Matrigel invasion assay showed that the attenuation of IGFBP2 expression indeed decreased the invasiveness of PA-1 cells. CONCLUSIONS We therefore showed that IGFBP2 enhances the invasion capacity of ovarian cancer cells. Blockage of IGFBP2 may thus constitute a viable strategy for targeted cancer therapy.
Collapse
Affiliation(s)
- Eun-Ju Lee
- Departments of Pathology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
- Department of Gynecologic Medical Oncology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
- Molecular Therapy Research Center, Samsung Medical Center, Seoul, 135–710, Korea
| | - Cristian Mircean
- Departments of Pathology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
- Institute of Signal Processing, Tampere University of Technology, Tampere, Finland
| | - Ilya Shmulevich
- Departments of Pathology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
| | - Huamin Wang
- Departments of Pathology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
| | - Jinsong Liu
- Departments of Pathology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
| | - Antti Niemistö
- Institute of Signal Processing, Tampere University of Technology, Tampere, Finland
| | - John J Kavanagh
- Department of Gynecologic Medical Oncology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
| | - Je-Ho Lee
- Molecular Therapy Research Center, Samsung Medical Center, Seoul, 135–710, Korea
| | - Wei Zhang
- Departments of Pathology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, Texas, 77030, USA
| |
Collapse
|
29
|
Namba R, Maglione JE, Young LJ, Borowsky AD, Cardiff RD, MacLeod CL, Gregg JP. Molecular Characterization of the Transition to Malignancy in a Genetically Engineered Mouse-Based Model of Ductal Carcinoma In situ. Mol Cancer Res 2004. [DOI: 10.1158/1541-7786.453.2.8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
A transplantable model of human ductal carcinoma in situ that progresses to invasive carcinoma was developed from a genetically engineered mouse (GEM). Additional lines were established using early mammary premalignant lesions from transgenic MMTV-PyV-mT mice. These lines were verified to be premalignant and transplanted repeatedly to establish stable and predictable properties. Here, we report the first in-depth molecular analysis of neoplastic progression occurring in one premalignant transplantable GEM-derived line. Oligonucleotide microarrays showed that many genes are differentially expressed between the quiescent and prelactating mammary gland and the premalignant GEM outgrowth. In contrast, a small but consistent group of genes was associated with the transformation from premalignancy to tumor. This suggests that the majority of gene expression changes occur during the premalignant transition from normal to premalignancy, whereas many fewer changes occur during the malignant transition from premalignancy to invasive carcinoma. The premalignant transition is associated with several cell cycle–related genes and the up-regulation of oncogenes is associated with various cancers (Ccnd11, Cdk4, Myb, and Ect2). The changes identified in the malignant transition included genes previously associated with human breast cancer progression. Misregulation of the insulin-like growth factor and transforming growth factor-β signaling pathways and the stromal-epithelial interaction were implicated. Our results suggest that this transplantable GEM-based model recapitulates human ductal carcinoma in situ at both histologic and molecular levels. With consistent tumor latency and molecular profiles, this model provides an experimental platform that can be used to assess functional genomics and molecular pharmacology and to test promising chemoprevention strategies.
Collapse
Affiliation(s)
- Ruria Namba
- 1Department of Pathology and Laboratory Medicine, School of Medicine and
| | - Jeannie E. Maglione
- 2Center for Comparative Medicine, University of California-Davis, Sacramento, California and
| | - Lawrence J.T. Young
- 2Center for Comparative Medicine, University of California-Davis, Sacramento, California and
| | - Alexander D. Borowsky
- 1Department of Pathology and Laboratory Medicine, School of Medicine and
- 2Center for Comparative Medicine, University of California-Davis, Sacramento, California and
| | - Robert D. Cardiff
- 1Department of Pathology and Laboratory Medicine, School of Medicine and
- 2Center for Comparative Medicine, University of California-Davis, Sacramento, California and
| | - Carol L. MacLeod
- 3Department of Medicine, School of Medicine, University of California-San Diego Cancer Center, La Jolla, California
| | - Jeffrey P. Gregg
- 1Department of Pathology and Laboratory Medicine, School of Medicine and
| |
Collapse
|
30
|
La P, Schnepp RW, D Petersen C, C Silva A, Hua X. Tumor suppressor menin regulates expression of insulin-like growth factor binding protein 2. Endocrinology 2004; 145:3443-50. [PMID: 15044367 PMCID: PMC2858565 DOI: 10.1210/en.2004-0124] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Multiple endocrine neoplasia type I (MEN1) is an inherited tumor syndrome characterized by development of tumors in multiple endocrine organs. The gene mutated in MEN1 patients, Men1, encodes a nuclear protein, menin. Menin interacts with several transcription factors and inhibits their activities. However, it is unclear whether menin is essential for the repression of the expression of endogenous genes. Here, using menin-null cells, we show that menin is essential for repression of the endogenous IGFBP-2, a gene that can regulate cell proliferation. Additionally, complementation of menin-null cells with wild-type menin, but not with a MEN1 disease-related point mutant, restores the function of menin in repressing IGFBP-2. Consistent with this, the promoter of IGFBP-2 is repressed by wild-type menin, but not by a MEN1-related point mutant. Menin also alters the structure of the chromatin surrounding the promoter of the IGFBP-2 gene, as demonstrated by the deoxyribonuclease I hypersensitivity assay. Furthermore, nuclear localization signals in menin are crucial for repressing the expression of IGFBP-2. Together, these results suggest that menin regulates the expression of the endogenous IGFBP-2 gene at least in part through the promoter of IGFBP-2.
Collapse
Affiliation(s)
- Ping La
- Abramson Family Cancer Research Institute, Department of Cancer Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6160, USA
| | | | | | | | | |
Collapse
|
31
|
Kumar-Sinha C, Chinnaiyan AM. Molecular markers to identify patients at risk for recurrence after primary treatment for prostate cancer. Urology 2003; 62 Suppl 1:19-35. [PMID: 14747039 DOI: 10.1016/j.urology.2003.10.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Accurate prognostication is a prerequisite for accurate therapeutics and management of prostate cancer because indolent tumors may require no intervention, whereas aggressive tumors lead to patient mortality. There is a critical need to define these subgroups of patients with prostate cancer differing in clinical outcome. Prognostic nomograms based on clinical data provide useful predictions of clinical states and outcomes, but they need further refinements to improve accuracy and universality. Genomic and proteomic analyses have provided many novel markers that may help define prognostic parameters based on the underlying biology of prostate cancer progression at the molecular level. These molecular markers are likely to augment traditional prognostic modalities by providing a set of molecularly defined and quantifiable variables. Encompassing the genome, transcriptome, and proteome of prostate cancer will likely provide "molecular signatures" that will bridge prognostication, prediction, and treatment in a single continuum.
Collapse
Affiliation(s)
- Chandan Kumar-Sinha
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan 48109-0602, USA
| | | |
Collapse
|