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Simvastatin inhibits prostatic hyperplasia in rats with metabolic syndrome. Int Urol Nephrol 2022; 54:2125-2131. [PMID: 35691993 DOI: 10.1007/s11255-022-03227-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 04/25/2022] [Indexed: 10/18/2022]
Abstract
OBJECTS To evaluate the influence of metabolic syndrome (MetS) induced by high fat diet (HFD) on prostate tissue and local inflammatory factors in rats model, and the protective efficacy of statins against pathological changes of prostate. METHODS 40 Sprague-Dawley rats were divided into 4 subgroups of normal diet (ND), HFD blank, HFD + saline and HFD + simvastatin. After the establishment of models, all subjects were killed to obtain body weight serum lipid, FBG level, FINS and HOMA-IR level. Hyperplasia level of prostate, as well as expression level of interleukin 6 (IL-6), insulin-like growth factor 1 (IGF-1), interleukin 10 (IL-10) and tumor necrosis factor alpha (TNF-α) were also measured. RESULTS Models have been successfully established. Level of serum lipid, prostatic weight, hyperplasia as well as expressions of IL-6, TNF-α and IGF-1 in the blank and saline subgroups of HFD group were higher than that of ND group (P < 0.05). While simvastatin has significantly resisted the former effects of HFD on serum lipid and prostate (P < 0.05). No significant difference in serum FBG level was found between groups and subunits. FINS levels of ND group was lower than other groups (P < 0.05). In addition, There is no significant difference in FPG and HOMA-IR levels in blank control subunit, saline control subunit, simvastatin subunit (P > 0.05). CONCLUSIONS MetS induced by HFD is an important factor in the induction of BPH. Simvastatin can alleviate the hyperplasia of prostate through the relief of local inflammation in prostatic tissue.
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2
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Ma JB, Bai JY, Zhang HB, Jia J, Shi Q, Yang C, Wang X, He D, Guo P. KLF5 inhibits STAT3 activity and tumor metastasis in prostate cancer by suppressing IGF1 transcription cooperatively with HDAC1. Cell Death Dis 2020; 11:466. [PMID: 32546700 PMCID: PMC7297795 DOI: 10.1038/s41419-020-2671-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 06/04/2020] [Accepted: 06/08/2020] [Indexed: 02/06/2023]
Abstract
KLF5 is frequently deleted and downregulated in prostate cancer, and recently it has been reported that KLF5 loss is enriched in the aggressive branches of prostate cancer evolution. However, why KLF5 loss is associated with prostate cancer aggressiveness is still not clear. Herein, we analyzed KLF5 expression in TCGA and GEO database, as well as prostate cancer tissue microarray, and found that KLF5 expression significantly decreased in prostate cancer accompanying with tumor progression; moreover, KLF5 downregulation was associated with shorter survival of patients. Interestingly, we also found that KLF5 expression was obviously lower in prostate cancer metastases than in localized tissues, indicating that KLF5 downregulation is associated with prostate cancer invasion and metastasis. To assess this effect of KLF5, we knocked down KLF5 in prostate cancer cells and found that KLF5 knockdown promoted invasive ability of prostate cancer cells in vitro and in vivo. Moreover, we found that KLF5 downregulation enhanced the expression of IGF1 and STAT3 phosphorylation, while block of IGF1 with antibody decreased the enhancement of STAT3 activity and prostate cancer cell invasive ability by KLF5 knockdown, indicating that KLF5 inhibits prostate cancer invasion through suppressing IGF1/STAT3 pathway. Mechanistically, we found that KLF5 interacted with deacetylase HDAC1 and KLF5 is necessary for the binding of HDAC1 on IGF1 promoter to suppress IGF1 transcription. Taken together, our results indicate that KLF5 could be an important suppressor of prostate cancer invasion and metastasis, because KLF5 could suppress the transcription of IGF1, a tumor cell autocrine cytokine, and its downstream cell signaling to inhibit cell invasive ability, and reveal a novel mechanism for STAT3 activation in prostate cancer. These findings may provide evidence for the precision medicine in prostate cancer.
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Affiliation(s)
- Jian-Bin Ma
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Ji-Yu Bai
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Hai-Bao Zhang
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Jing Jia
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Qi Shi
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Chao Yang
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xinyang Wang
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Key laboratory for Tumor Precision Medicine of Shaanxi Province, Xi'an, Shaanxi, China.,Oncology Research Lab, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Dalin He
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China. .,Key laboratory for Tumor Precision Medicine of Shaanxi Province, Xi'an, Shaanxi, China. .,Oncology Research Lab, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China.
| | - Peng Guo
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China. .,Key laboratory for Tumor Precision Medicine of Shaanxi Province, Xi'an, Shaanxi, China. .,Oncology Research Lab, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China.
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3
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Circulating IGF-1 promotes prostate adenocarcinoma via FOXO3A/BIM signaling in a double-transgenic mouse model. Oncogene 2019; 38:6338-6353. [DOI: 10.1038/s41388-019-0880-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 03/05/2019] [Accepted: 04/18/2019] [Indexed: 11/08/2022]
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4
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Omar HA, Tolba MF. Caffeic acid phenethyl ester guards against benign prostate hypertrophy in rats: Role of IGF-1R/protein kinase-B (Akt)/β-catenin signaling. IUBMB Life 2018; 70:519-528. [PMID: 29603556 DOI: 10.1002/iub.1743] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 03/06/2018] [Indexed: 01/05/2023]
Abstract
Benign prostate hypertrophy (BPH) is among the most common diseases with a huge impact on the quality of life of elderly men. There is a current need for the development of well-tolerated and effective preventive strategies to improve the clinical outcome. Caffeic acid phenethyl ester (CAPE) is an important active ingredient isolated from honey-bee propolis with potent anti-proliferative, anti-inflammatory and antioxidant effects. These properties promote CAPE as a promising candidate to be tested as an alternative therapy for BPH, which is still uninvestigated. Herein, we tested the ability of CAPE to guard against testosterone-induced BPH and investigated the involvement of IGF1-R/Akt/β-catenin signaling as a protective mechanism in testosterone-induced BPH rat model. Treatment with CAPE reduced testosterone-induced increase in the prostate index and histopathological alterations. In addition, co-treatment with CAPE significantly suppressed insulin-like growth factor-1 receptor (IGF-1R)/Akt/β-catenin/cyclinD1 axis as well as tumor necrosis factor-α level and nuclear factor (NF)-kB activity. Furthermore, the treatment with CAPE replenished the antioxidant defense systems, superoxide dismutase (SOD) and reduced glutathione (GSH) with subsequent reduction in prostate tissue lipid peroxides. This study highlights the potential merit of CAPE-enriched propolis formulations to protect elderly men against the development of BPH. © 2018 IUBMB Life, 70(6):519-528, 2018.
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Affiliation(s)
- Hany A Omar
- College of Pharmacy, University of Sharjah, Sharjah, 27272, United Arab Emirates.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Mai F Tolba
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt.,Biology Department, School of Sciences and Engineering, The American University in Cairo, New Cairo, Egypt
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5
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Das SK, Pradhan AK, Bhoopathi P, Talukdar S, Shen XN, Sarkar D, Emdad L, Fisher PB. The MDA-9/Syntenin/IGF1R/STAT3 Axis Directs Prostate Cancer Invasion. Cancer Res 2018; 78:2852-2863. [PMID: 29572229 DOI: 10.1158/0008-5472.can-17-2992] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 02/26/2018] [Accepted: 03/19/2018] [Indexed: 11/16/2022]
Abstract
Although prostate cancer is clinically manageable during several stages of progression, survival is severely compromised once cells invade and metastasize to distant organs. Comprehending the pathobiology of invasion is required for developing efficacious targeted therapies against metastasis. Based on bioinformatics data, we predicted an association of melanoma differentiation-associated gene-9 [syntenin, or syndecan binding protein (SDCBP)] in prostate cancer progression. Using tissue samples from various Gleason stage prostate cancer patients with adjacent normal tissue, a series of normal prostate and prostate cancer cell lines (with differing tumorigenic/metastatic properties), mda-9/syntenin-manipulated variants (including loss-of-function and gain-of-function cell lines), and CRISPR/Cas9 stable MDA-9/Syntenin knockout cells, we now confirm the relevance of and dependence on MDA-9/syntenin in prostate cancer invasion. MDA-9/Syntenin physically interacted with insulin-like growth factor-1 receptor following treatment with insulin-like growth factor binding protein-2 (IGFBP2), regulating downstream signaling processes that enabled STAT3 phosphorylation. This activation enhanced expression of MMP2 and MMP9, two established enzymes that positively regulate invasion. In addition, MDA-9/syntenin-mediated upregulation of proangiogenic factors including IGFBP2, IL6, IL8, and VEGFA also facilitated migration of prostate cancer cells. Collectively, our results draw attention to MDA-9/Syntenin as a positive regulator of prostate cancer metastasis, and the potential application of targeting this molecule to inhibit invasion and metastasis in prostate cancer and potentially other cancers.Significance: This study provides new mechanistic insight into the proinvasive role of MDA-9/Syntenin in prostate cancer and has potential for therapeutic application to prevent prostate cancer metastasis. Cancer Res; 78(11); 2852-63. ©2018 AACR.
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Affiliation(s)
- Swadesh K Das
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. .,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.,VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Anjan K Pradhan
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Praveen Bhoopathi
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Sarmistha Talukdar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Xue-Ning Shen
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.,VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Luni Emdad
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.,VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia. .,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, Virginia.,VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
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6
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Shi YF, Yu DJ, Jiang CY, Wang XJ, Zhu YP, Zhao RZ, Lv Z, Sun XW. TRAF6 regulates proliferation of stromal cells in the transition and peripheral zones of benign prostatic hyperplasia via Akt/mTOR signaling. Prostate 2018; 78:193-201. [PMID: 29171041 DOI: 10.1002/pros.23456] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 10/31/2017] [Indexed: 01/04/2023]
Abstract
BACKGROUND Increased prostatic smooth muscle tone and hyperplastic growth contribute to urethral obstruction and voiding symptoms in benign prostatic hyperplasia (BPH). It has been suggested that different proliferative potential of stromal cells between transition zone (TZ) and adjoining regions of the prostate plays a significant role in the development of BPH. However, the molecular mechanisms of this hyperplastic process remain unclear. We found tumor necrosis factor receptor-associated factor 6 (TRAF6) highly expressed in TZ stromal cells compared to peripheral zone (PZ) stromal cells by gene array analyzes. Therefore, we aim to study the potential mechanisms of stromal TRAF6 in promoting BPH progression. METHODS Stromal cells obtained from BPH-derived primary cultures. The TRAF6-siRNA vector were constructed and transfected into cultured human BPH primary TZ stromal cells, and TRAF6-overexpressing vector were constructed and transfected into cultured human BPH primary PZ stromal cells. Stromal cells were recombined with BPH-1 cells then subcutaneously inoculated into the kidney capsule of male nude mice. Cell proliferation was evaluated by CCK-8 assay. Multiple proteins in the Akt/mTOR pathway were assessed using western blot. RESULTS TRAF6 levels were increased in TZ stroma compared with PZ stroma of BPH. The in vitro cell culture and in vivo cell recombination revealed that selective downregulation of TRAF6 in TZ stromal cells led to suppression of the proliferation, while upregulation of TRAF6 in PZ stromal cells enhanced the proliferation. We found that the Phosphorylation and Ubiquitination of Akt as well as the Phosphorylation of mTOR, P70S6K were decreased when TRAF6 was downregulated in primary cultured TZ stromal cells of BPH. CONCLUSIONS TRAF6 can promote the proliferation of stromal cells of BPH via Akt/mTOR signaling. Our results may make stromal TRAF6 responsible for zonal characteristic of BPH and as a promising therapeutic strategy for BPH treatment.
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Affiliation(s)
- Yun-Feng Shi
- Department of Urology, Shanghai General Hospital of Nanjing Medical University, Shanghai, China
- Department of Urology, Wujin Hospital Affiliated Jiangsu University, Changzhou, China
| | - Dian-Jun Yu
- Department of Urology, Shanghai General Hospital of Nanjing Medical University, Shanghai, China
- Department of Urology, Ningbo Medical Center Lihuili Eastern Hospiital, Ningbo, China
| | - Chen-Yi Jiang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xing-Jie Wang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yi-Ping Zhu
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Rui-Zhe Zhao
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhong Lv
- Department of Urology, Wujin Hospital Affiliated Jiangsu University, Changzhou, China
| | - Xiao-Wen Sun
- Department of Urology, Shanghai General Hospital of Nanjing Medical University, Shanghai, China
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
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7
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Wang Z, Xiao X, Ge R, Li J, Johnson CW, Rassoulian C, Olumi AF. Metformin inhibits the proliferation of benign prostatic epithelial cells. PLoS One 2017; 12:e0173335. [PMID: 28253329 PMCID: PMC5333882 DOI: 10.1371/journal.pone.0173335] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 02/20/2017] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVE Benign prostatic hyperplasia (BPH) is the most common proliferative abnormality of the prostate affecting elderly men throughout the world. Epidemiologic studies have shown that diabetes significantly increases the risk of developing BPH, although whether anti-diabetic medications preventing the development of BPH remains to be defined. We have previously found that stromally expressed insulin-like growth factor 1 (IGF-1) promotes benign prostatic epithelial cell proliferation through paracrine mechanisms. Here, we seek to understand if metformin, a first line medication for the treatment of type 2 diabetes, inhibits the proliferation of benign prostatic epithelial cells through reducing the expression of IGF-1 receptor (IGF-1R) and regulating cell cycle. METHODS BPE cell lines BPH-1 and P69, murine fibroblasts3T3 and primary human prostatic fibroblasts were cultured and tested in this study. Cell proliferation and the cell cycle were analyzed by MTS assay and flow cytometry, respectively. The expression of IGF-1R was determined by western-blot and immunocytochemistry. The level of IGF-1 secretion in culture medium was measured by ELISA. RESULTS Metformin (0.5-10mM, 6-48h) significantly inhibited the proliferation of BPH-1 and P69 cells in a dose-dependent and time-dependent manner. Treatment with metformin for 24 hours lowered the G2/M cell population by 43.24% in P69 cells and 24.22% in BPH-1 cells. On the other hand, IGF-1 (100ng/mL, 24h) stimulated the cell proliferation (increased by 28.81% in P69 cells and 20.95% in BPH-1 cells) and significantly enhanced the expression of IGF-1R in benign prostatic epithelial cells. Metformin (5mM) abrogated the proliferation of benign prostatic epithelial cells induced by IGF-1. In 3T3 cells, the secretion of IGF-1 was significantly inhibited by metformin from 574.31pg/ml to 197.61pg/ml. The conditioned media of 3T3 cells and human prostatic fibroblasts promoted the proliferation of epithelial cells and the expression of IGF-1R in epithelial cells. Metformin abrogated the proliferation of benign prostatic epithelial cells promoted by 3T3 conditioned medium. CONCLUSIONS Our study demonstrates that metformin inhibits the proliferation of benign prostatic epithelial cells by suppressing the expression of IGF-1R and IGF-1 secretion in stromal cells. Metformin lowers the G2/M cell population and simultaneously increases the G0/G1 population. Findings here might have significant clinical implications in management of BPH patients treated with metformin.
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Affiliation(s)
- Zongwei Wang
- Department of Urology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Xingyuan Xiao
- Department of Urology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Urology, Wuhan Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Rongbin Ge
- Department of Pathology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Jijun Li
- Shanghai Children 's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Cameron W. Johnson
- Department of Urology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Cyrus Rassoulian
- Department of Urology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Aria F. Olumi
- Department of Urology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
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8
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Hahn AM, Myers JD, McFarland EK, Lee S, Jerde TJ. Interleukin-driven insulin-like growth factor promotes prostatic inflammatory hyperplasia. J Pharmacol Exp Ther 2014; 351:605-15. [PMID: 25292180 DOI: 10.1124/jpet.114.218693] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Prostatic inflammation is of considerable importance to urologic research because of its association with benign prostatic hyperplasia and prostate cancer. However, the mechanisms by which inflammation leads to proliferation and growth remain obscure. Here, we show that insulin-like growth factors (IGFs), previously known as critical developmental growth factors during prostate organogenesis, are induced by inflammation as part of the proliferative recovery to inflammation. Using genetic models and in vivo IGF receptor blockade, we demonstrate that the hyperplastic response to inflammation depends on interleukin-1-driven IGF signaling. We show that human prostatic hyperplasia is associated with IGF pathway activation specifically localized to foci of inflammation. This demonstrates that mechanisms of inflammation-induced epithelial proliferation and hyperplasia involve the induction of developmental growth factors, further establishing a link between inflammatory and developmental signals and providing a mechanistic basis for the management of proliferative diseases by IGF pathway modulation.
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Affiliation(s)
- Alana M Hahn
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana (A.M.H., J.D.M., T.J.J.); Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, Wisconsin (E.K.M., S.L.); and Melvin and Bren Simon Cancer Center, Indiana Basic Urological Research Working Group, Indiana University, Indianapolis, Indiana (T.J.J.)
| | - Jason D Myers
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana (A.M.H., J.D.M., T.J.J.); Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, Wisconsin (E.K.M., S.L.); and Melvin and Bren Simon Cancer Center, Indiana Basic Urological Research Working Group, Indiana University, Indianapolis, Indiana (T.J.J.)
| | - Eliza K McFarland
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana (A.M.H., J.D.M., T.J.J.); Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, Wisconsin (E.K.M., S.L.); and Melvin and Bren Simon Cancer Center, Indiana Basic Urological Research Working Group, Indiana University, Indianapolis, Indiana (T.J.J.)
| | - Sanghee Lee
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana (A.M.H., J.D.M., T.J.J.); Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, Wisconsin (E.K.M., S.L.); and Melvin and Bren Simon Cancer Center, Indiana Basic Urological Research Working Group, Indiana University, Indianapolis, Indiana (T.J.J.)
| | - Travis J Jerde
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana (A.M.H., J.D.M., T.J.J.); Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, Wisconsin (E.K.M., S.L.); and Melvin and Bren Simon Cancer Center, Indiana Basic Urological Research Working Group, Indiana University, Indianapolis, Indiana (T.J.J.)
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9
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Zhang X, Zeng X, Liu Y, Dong L, Zhao X, Qu X. Impact of metabolic syndrome on benign prostatic hyperplasia in elderly Chinese men. Urol Int 2014; 93:214-9. [PMID: 24862628 DOI: 10.1159/000357760] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 11/13/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aim of the present study was to evaluate the impact of metabolic syndrome (MetS) on benign prostatic hyperplasia (BPH) in elderly Chinese men. METHODS A total of 401 elderly BPH patients were divided into the without or with MetS group to assess the associations of MetS and components of MetS with BPH. Urologic evaluation included prostate volume, International Prostate Symptom Score, serum prostate-specific antigen, duration of concomitant lower urinary tract symptoms (LUTS) and maximum flow rate. RESULTS Body mass index (BMI), waist circumference, fasting glucose, glycosylated hemoglobin, triglyceride, fasting insulin (FINS), insulin resistance assessed by homeostasis model assessment (HOMA-IR) were greater and high-density lipoprotein cholesterol (HDL-C) was lower in BPH patients with MetS than in those without MetS. The patients with MetS showed a significantly larger prostate volume (p = 0.000) and longer duration of LUTS (p = 0.006) than those without MetS. Prostate volume was positively correlated with BMI (p = 0.000), FINS (p = 0.001), HOMA-IR (p = 0.003) and inversely correlated with HDL-C (p = 0.000). Multiple linear regression analysis showed that prostate volume was significantly correlated with HOMA-IR (p = 0.015). CONCLUSIONS Our results suggest that MetS, BMI, low HDL-C level, increased serum insulin and especially insulin resistance are considered risk factors for prostate enlargement in elderly Chinese men.
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Affiliation(s)
- Xiangyu Zhang
- Department of Geriatrics, Second Xiangya Hospital of Central South University, Changsha, P.R. China
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10
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Colvin EK, Weir C, Ikin RJ, Hudson AL. SV40 TAg mouse models of cancer. Semin Cell Dev Biol 2014; 27:61-73. [PMID: 24583142 DOI: 10.1016/j.semcdb.2014.02.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 02/03/2014] [Accepted: 02/05/2014] [Indexed: 02/09/2023]
Abstract
The discovery of a number of viruses with the ability to induce tumours in animals and transform human cells has vastly impacted cancer research. Much of what is known about tumorigenesis today regarding tumour drivers and tumour suppressors has been discovered through experiments using viruses. The SV40 virus has proven extremely successful in generating transgenic models of many human cancer types and this review provides an overview of these models and seeks to give evidence as to their relevance in this modern era of personalised medicine and technological advancements.
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Affiliation(s)
- Emily K Colvin
- Bill Walsh Translational Cancer Research Laboratory, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St. Leonards, New South Wales 2065, Australia.
| | - Chris Weir
- Bill Walsh Translational Cancer Research Laboratory, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St. Leonards, New South Wales 2065, Australia.
| | - Rowan J Ikin
- Bill Walsh Translational Cancer Research Laboratory, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St. Leonards, New South Wales 2065, Australia.
| | - Amanda L Hudson
- Bill Walsh Translational Cancer Research Laboratory, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St. Leonards, New South Wales 2065, Australia.
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11
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Kato M, Ishii K, Iwamoto Y, Sasaki T, Kanda H, Yamada Y, Arima K, Shiraishi T, Sugimura Y. Activation of FGF2-FGFR signaling in the castrated mouse prostate stimulates the proliferation of basal epithelial cells. Biol Reprod 2013; 89:81. [PMID: 23946540 DOI: 10.1095/biolreprod.112.107516] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The prostate gland is unique in that it undergoes rapid regression following castration but regenerates completely once androgens are replaced. Residual ductal components play an important role in the regeneration of a fully functional prostate. In this study, to examine how androgen status affects prostate structure and components, we conducted histopathological studies of the involuted and regenerated mouse dorsolateral prostate (DLP). In the castrated mouse DLP, the number of luminal epithelial cells decreased in a time-dependent manner. On Day 14 postandrogen replacement, the number of luminal epithelial cells was completely restored to the baseline level. In contrast, the number of basal epithelial cells gradually increased in the castrated mouse prostate. The Ki67-labeling index of prostate basal epithelial cells was significantly increased after castration. The number of basal epithelial cells decreased to baseline after androgen replacement. After castration, mRNA expression levels of specific growth factors, such as Fgf2, Fgf7, Hgf, Tgfa, and Tgfb, were relatively abundant in whole mouse DLPs. In organ culture experiments, basal epithelial proliferation was recapitulated in the absence of dihydrotestosterone (DHT). The proliferation of basal epithelial cells in the absence of DHT was suppressed by treatment with an FGF receptor inhibitor (PD173074). Moreover, FGF2 treatment directly stimulated the proliferation of basal epithelial cells. Taken together, these data indicated that the FGF2-FGF receptor signal cascade in the prostate gland may be one of the pathways stimulating the proliferation of basal epithelial cells in the absence of androgens.
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Affiliation(s)
- Manabu Kato
- Department of Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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12
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Irshad S, Abate-Shen C. Modeling prostate cancer in mice: something old, something new, something premalignant, something metastatic. Cancer Metastasis Rev 2013; 32:109-22. [PMID: 23114843 PMCID: PMC3584242 DOI: 10.1007/s10555-012-9409-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
More than 15 years ago, the first generation of genetically engineered mouse (GEM) models of prostate cancer was introduced. These transgenic models utilized prostate-specific promoters to express SV40 oncogenes specifically in prostate epithelium. Since the description of these initial models, there have been a plethora of GEM models of prostate cancer representing various perturbations of oncogenes or tumor suppressors, either alone or in combination. This review describes these GEM models, focusing on their relevance for human prostate cancer and highlighting their strengths and limitations, as well as opportunities for the future.
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Affiliation(s)
- Shazia Irshad
- Herbert Irving Comprehensive Cancer Center, Departments of Urology and Pathology & Cell Biology, Columbia University College of Physicians and Surgeons, New York, NY, USA
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13
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Genetically engineered mouse models of prostate cancer. Mol Oncol 2013; 7:190-205. [PMID: 23481269 DOI: 10.1016/j.molonc.2013.02.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 02/06/2013] [Indexed: 11/24/2022] Open
Abstract
Despite major improvement in treatment of early stage localised prostate cancer, the distinction between indolent tumors and those that will become aggressive, as well as the lack of efficient therapies of advanced prostate cancer, remain major health problems. Genetically engineered mice (GEM) have been extensively used to investigate the molecular and cellular mechanisms underlying prostate tumor initiation and progression, and to evaluate new therapies. Moreover, the recent development of conditional somatic mutagenesis in the mouse prostate offers the possibility to generate new models that more faithfully reproduce the human disease, and thus should contribute to improve diagnosis and treatments. The strengths and weaknesses of various models will be discussed, as well as future opportunities.
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14
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Polisca A, Orlandi R, Troisi A, Brecchia G, Zerani M, Boiti C, Zelli R. Clinical Efficacy of the GnRH Agonist (Deslorelin) in Dogs Affected by Benign Prostatic Hyperplasia and Evaluation of Prostatic Blood Flow by Doppler Ultrasound. Reprod Domest Anim 2013; 48:673-80. [DOI: 10.1111/rda.12143] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Accepted: 12/17/2012] [Indexed: 11/26/2022]
Affiliation(s)
- A Polisca
- Dipartimento di Patologia; Diagnostica e Clinica Veterinaria; Sezione di Ostetricia e Ginecologia; Facoltà di Medicina Veterinaria; Università degli Studi di Perugia; Perugia; Italy
| | - R Orlandi
- Dipartimento di Patologia; Diagnostica e Clinica Veterinaria; Sezione di Ostetricia e Ginecologia; Facoltà di Medicina Veterinaria; Università degli Studi di Perugia; Perugia; Italy
| | - A Troisi
- Dipartimento di Patologia; Diagnostica e Clinica Veterinaria; Sezione di Ostetricia e Ginecologia; Facoltà di Medicina Veterinaria; Università degli Studi di Perugia; Perugia; Italy
| | - G Brecchia
- Dipartimento di Scienze Biopatologiche ed Igiene delle Produzioni Animali e Alimentari; Facoltà di Medicina Veterinaria; Università degli Studi di Perugia; Perugia; Italy
| | - M Zerani
- Scuola di Scienze mediche veterinarie; Università di Camerino; Camerino; Italy
| | - C Boiti
- Dipartimento di Scienze Biopatologiche ed Igiene delle Produzioni Animali e Alimentari; Facoltà di Medicina Veterinaria; Università degli Studi di Perugia; Perugia; Italy
| | - R Zelli
- Dipartimento di Patologia; Diagnostica e Clinica Veterinaria; Sezione di Ostetricia e Ginecologia; Facoltà di Medicina Veterinaria; Università degli Studi di Perugia; Perugia; Italy
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15
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Lai KP, Yamashita S, Vitkus S, Shyr CR, Yeh S, Chang C. Suppressed prostate epithelial development with impaired branching morphogenesis in mice lacking stromal fibromuscular androgen receptor. Mol Endocrinol 2011; 26:52-66. [PMID: 22135068 DOI: 10.1210/me.2011-1189] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Using the cre-loxP system, we generated a new mouse model [double stromal androgen receptor knockout (dARKO)] with selectively deleted androgen receptor (AR) in both stromal fibroblasts and smooth muscle cells, and found the size of the anterior prostate (AP) lobes was significantly reduced as compared with those from wild-type littermate controls. The reduction in prostate size of the dARKO mouse was accompanied by impaired branching morphogenesis and partial loss of the infolding glandular structure. Further dissection found decreased proliferation and increased apoptosis of the prostate epithelium in the dARKO mouse AP. These phenotype changes were further confirmed with newly established immortalized prostate stromal cells (PrSC) from wild-type and dARKO mice. Mechanistically, IGF-1, placental growth factor, and secreted phosphoprotein-1 controlled by stromal AR were differentially expressed in PrSC-wt and PrSC-ARKO. Moreover, the conditioned media (CM) from PrSC-wt promoted prostate epithelium growth significantly as compared with CM from PrSC-dARKO. Finally, adding IGF-1/placental growth factor recombinant proteins into PrSC-dARKO CM was able to partially rescue epithelium growth. Together, our data concluded that stromal fibromuscular AR could modulate epithelium growth and maintain cellular homeostasis through identified growth factors.
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Affiliation(s)
- Kuo-Pao Lai
- George H Whipple Laboratory for Cancer Research, University of Rochester Medical Center, Rochester, New York 14642, USA
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16
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Himpe E, Potikanond S, Verdood P, Kooijman R. Attenuation of IGF-I receptor signaling inhibits serum-induced proliferation of prostate cancer cells. Growth Horm IGF Res 2011; 21:252-259. [PMID: 21820343 DOI: 10.1016/j.ghir.2011.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2009] [Revised: 06/10/2011] [Accepted: 07/07/2011] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Several studies showed that high serum levels of insulin-like growth factor-I (IGF-I) correlate with an increased risk for prostate cancer, although the causal role of IGF-I remains to be established. In this study, we addressed the role of IGF-I as a serum factor on the growth of two androgen-independent cell lines (Du145 and PC3) and one androgen-dependent cell line (LNCaP). DESIGN We investigated the effects of a blocking antibody against the IGF-I receptor (αIR3) on DNA synthesis in prostate cancer cells cultured in the presence of recombinant human IGF-I or normal human serum (NHS). RESULTS We show that in all three prostate cancer cell lines, NHS exerts a markedly stronger stimulating effect on DNA synthesis than IGF-I, and that the effect of NHS can be completely abrogated by an antibody against the IGF-I receptor (αIR3). Using pharmacological inhibitors of the two canonical IGF-I receptor signaling pathways, we show that the phosphatidylinositol-3'-kinase (PI3K) and the Mek-Erk pathways are not required for the stimulating effect of NHS. CONCLUSION Our observations indicate that the stimulating effect of NHS is completely dependent on IGF-I receptor signaling transduction and that IGF-I stimulates DNA synthesis in prostate cancer cells in strong synergy with other serum factors. We speculate that the role of other serum factors could explain the discrepancy between the results observed in different animal models to study the function of IGF-I in prostate cancer.
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Affiliation(s)
- Eddy Himpe
- Medical School, Department of Pharmacology, Vrije Universiteit Brussel, Belgium.
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17
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McLaren ID, Jerde TJ, Bushman W. Role of interleukins, IGF and stem cells in BPH. Differentiation 2011; 82:237-43. [PMID: 21864972 DOI: 10.1016/j.diff.2011.06.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 06/09/2011] [Accepted: 06/14/2011] [Indexed: 12/22/2022]
Abstract
The condition known as benign prostatic hyperplasia may be defined as a benign enlargement of the prostate gland resulting from a proliferation of both benign epithelial and stromal elements. It might also be defined clinically as a constellation of lower urinary tract symptoms (LUTSs) in aging men. The purpose of this review is to consider the ways in which inflammatory cytokines belonging to the interleukin family, members of the IFG family, and stem cells may contribute to the development and progression of BPH-LUTS. This might occur in three mechanisms: One, interleukin signaling, IFG signaling and stem cells may contribute to reactivation of developmental growth mechanisms in the adult prostate leading to tissue growth. Two, given that epidemiologic studies indicate an increased incidence of BPH-LUTS in association with obesity and diabetes, IFG signaling may provide the mechanistic basis for the effect of diabetes and obesity on prostate growth. Three, expression of interleukins in association with inflammation in the prostate may induce sensitization of afferent fibers innervating the prostate and result in increased sensitivity to pain and noxious sensations in the prostate and bladder and heightened sensitivity to bladder filling.
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Affiliation(s)
- Ian D McLaren
- Department of Urology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53792, USA
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18
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Modeling Human Prostate Cancer in Genetically Engineered Mice. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2011; 100:1-49. [DOI: 10.1016/b978-0-12-384878-9.00001-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Jones RA, Petrik JJ, Moorehead RA. Preneoplastic changes persist after IGF-IR downregulation and tumor regression. Oncogene 2010; 29:4779-86. [DOI: 10.1038/onc.2010.231] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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20
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Tanori M, Santone M, Mancuso M, Pasquali E, Leonardi S, Di Majo V, Rebessi S, Saran A, Pazzaglia S. Developmental and oncogenic effects of insulin-like growth factor-I in Ptc1+/- mouse cerebellum. Mol Cancer 2010; 9:53. [PMID: 20214787 PMCID: PMC2846887 DOI: 10.1186/1476-4598-9-53] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2009] [Accepted: 03/09/2010] [Indexed: 02/07/2023] Open
Abstract
Background Medulloblastoma is amongst the most common malignant brain tumors in childhood, arising from neoplastic transformation of granule neuron precursors (GNPs) of the cerebellum via deregulation of pathways involved in cerebellar development. Deregulation of the Sonic hedgehog/Patched1 (Shh/Ptc1) signaling pathway predisposes humans and mice to medulloblastoma. In the brain, insulin-like growth factor (IGF-I) plays a critical role during development as a neurotrophic and neuroprotective factor, and in tumorigenesis, as IGF-I receptor is often activated in medulloblastomas. Results To investigate the mechanisms of genetic interactions between Shh and IGF signaling in the cerebellum, we crossed nestin/IGF-I transgenic (IGF-I Tg) mice, in which transgene expression occurs in neuron precursors, with Ptc1+/- knockout mice, a model of medulloblastoma in which cancer develops in a multistage process. The IGF-I transgene produced a marked brain overgrowth, and significantly accelerated tumor development, increasing the frequency of pre-neoplastic lesions as well as full medulloblastomas in Ptc1+/-/IGF-I Tg mice. Mechanistically, tumor promotion by IGF-I mainly affected preneoplastic stages through de novo formation of lesions, while not influencing progression rate to full tumors. We also identified a marked increase in survival and proliferation, and a strong suppression of differentiation in neural precursors. Conclusions As a whole, our findings indicate that IGF-I overexpression in neural precursors leads to brain overgrowth and fosters external granular layer (EGL) proliferative lesions through a mechanism favoring proliferation over terminal differentiation, acting as a landscape for tumor growth. Understanding the molecular events responsible for cerebellum development and their alterations in tumorigenesis is critical for the identification of potential therapeutic targets.
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Affiliation(s)
- Mirella Tanori
- Section of Toxicology and Biomedical Sciences, ENEA CR-Casaccia, Rome, Italy
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21
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22
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Ohlsson C, Mohan S, Sjögren K, Tivesten A, Isgaard J, Isaksson O, Jansson JO, Svensson J. The role of liver-derived insulin-like growth factor-I. Endocr Rev 2009; 30:494-535. [PMID: 19589948 PMCID: PMC2759708 DOI: 10.1210/er.2009-0010] [Citation(s) in RCA: 300] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
IGF-I is expressed in virtually every tissue of the body, but with much higher expression in the liver than in any other tissue. Studies using mice with liver-specific IGF-I knockout have demonstrated that liver-derived IGF-I, constituting a major part of circulating IGF-I, is an important endocrine factor involved in a variety of physiological and pathological processes. Detailed studies comparing the impact of liver-derived IGF-I and local bone-derived IGF-I demonstrate that both sources of IGF-I can stimulate longitudinal bone growth. We propose here that liver-derived circulating IGF-I and local bone-derived IGF-I to some extent have overlapping growth-promoting effects and might have the capacity to replace each other (= redundancy) in the maintenance of normal longitudinal bone growth. Importantly, and in contrast to the regulation of longitudinal bone growth, locally derived IGF-I cannot replace (= lack of redundancy) liver-derived IGF-I for the regulation of a large number of other parameters including GH secretion, cortical bone mass, kidney size, prostate size, peripheral vascular resistance, spatial memory, sodium retention, insulin sensitivity, liver size, sexually dimorphic liver functions, and progression of some tumors. It is clear that a major role of liver-derived IGF-I is to regulate GH secretion and that some, but not all, of the phenotypes in the liver-specific IGF-I knockout mice are indirect, mediated via the elevated GH levels. All of the described multiple endocrine effects of liver-derived IGF-I should be considered in the development of possible novel treatment strategies aimed at increasing or reducing endocrine IGF-I activity.
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Affiliation(s)
- Claes Ohlsson
- Division of Endocrinology, Institute of Medicine, Sahlgrenska University Hospital, Göteborg, Sweden.
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Sutherland BW, Knoblaugh SE, Kaplan-Lefko PJ, Wang F, Holzenberger M, Greenberg NM. Conditional Deletion of Insulin-like Growth Factor-I Receptor in Prostate Epithelium. Cancer Res 2008; 68:3495-504. [DOI: 10.1158/0008-5472.can-07-6531] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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