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Kubota S, Miura T, Wakiya T, Yoshizawa T, Goto S, Morohashi H, Sakamoto Y, Tatara Y, Kijima H, Hakamada K. Exploration of Malignant Characteristics in Neoadjuvant Chemotherapy-Resistant Rectal Cancer, Focusing on Extramural Lesions. Ann Surg Oncol 2023; 30:7612-7623. [PMID: 37548833 PMCID: PMC10562322 DOI: 10.1245/s10434-023-13928-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 06/28/2023] [Indexed: 08/08/2023]
Abstract
BACKGROUND Extramural vascular invasion (EMVI) and tumor deposits (TD) are poor prognostic factors in rectal cancer (RC), especially when resistant to neoadjuvant chemotherapy (NAC). We aimed to define differential expression in NAC responders and non-responders with concomitant EMVI and TD. METHODS From 52 RC surgical patients, post-NAC resected specimens were extracted, comprising two groups: cases with residual EMVI and TD (NAC-resistant) and cases without (NAC-effective). Proteomic analysis was conducted to define differential protein expression in the two groups. To validate the findings, immunohistochemistry was performed in another cohort that included 58 RC surgical patients. Based on the findings, chemosensitivity and prognosis were compared. RESULTS The NAC-resistant group was associated with a lower 3-year disease-free survival rate than the NAC-effective group (p = 0.041). Discriminative proteins in the NAC-resistant group were highly associated with the sulfur metabolism pathway. Among these pathway constituents, selenium-binding protein 1 (SELENBP1) expression in the NAC-resistant group decreased to less than one-third of that of the NAC-effective group. Immunohistochemistry in another RC cohort consistently validated the relationship between decreased SELENBP1 and poorer NAC sensitivity, in both pre-NAC biopsy and post-NAC surgery specimens. Furthermore, decrease in SELENBP1 was associated with a lower 3-year disease-free survival rate (p = 0.047). CONCLUSIONS We defined one of the differentially expressed proteins in NAC responders and non-responders, concomitant with EMVI and TD. SELENBP1 was suspected to contribute to NAC resistance and poor prognosis in RC.
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Affiliation(s)
- Shunsuke Kubota
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Takuya Miura
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Taiichi Wakiya
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Tadashi Yoshizawa
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Shintaro Goto
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Hajime Morohashi
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Yoshiyuki Sakamoto
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Yota Tatara
- Department of Stress Response Science, Center for Advanced Medical Research, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Hiroshi Kijima
- Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Kenichi Hakamada
- Department of Gastroenterological Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan.
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2
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Kim S, Lee SY, Seo HR. Deciphering the underlying mechanism of liver diseases through utilization of multicellular hepatic spheroid models. BMB Rep 2023; 56:225-233. [PMID: 36814078 PMCID: PMC10140482 DOI: 10.5483/bmbrep.2023-0010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/12/2023] [Accepted: 02/16/2023] [Indexed: 03/02/2024] Open
Abstract
Hepatocellular carcinoma (HCC) is a very common form of cancer worldwide and is often fatal. Although the histopathology of HCC is characterized by metabolic pathophysiology, fibrosis, and cirrhosis, the focus of treatment has been on eliminating HCC. Recently, three-dimensional (3D) multicellular hepatic spheroid (MCHS) models have provided a) new therapeutic strategies for progressive fibrotic liver diseases, such as antifibrotic and anti-inflammatory drugs, b) molecular targets, and c) treatments for metabolic dysregulation. MCHS models provide a potent anti-cancer tool because they can mimic a) tumor complexity and heterogeneity, b) the 3D context of tumor cells, and c) the gradients of physiological parameters that are characteristic of tumors in vivo. However, the information provided by an multicelluar tumor spheroid (MCTS) model must always be considered in the context of tumors in vivo. This mini-review summarizes what is known about tumor HCC heterogeneity and complexity and the advances provided by MCHS models for innovations in drug development to combat liver diseases. [BMB Reports 2023; 56(4): 225-233].
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Affiliation(s)
- Sanghwa Kim
- Advanced Biomedical Research Laboratory, Institut Pasteur Korea, Seongnam 13488, Korea
| | - Su-Yeon Lee
- Advanced Biomedical Research Laboratory, Institut Pasteur Korea, Seongnam 13488, Korea
| | - Haeng Ran Seo
- Advanced Biomedical Research Laboratory, Institut Pasteur Korea, Seongnam 13488, Korea
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3
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Lee SY, Kim S, Song Y, Kim N, No J, Kim KM, Seo HR. Sorbitol dehydrogenase induction of cancer cell necroptosis and macrophage polarization in the HCC microenvironment suppresses tumor progression. Cancer Lett 2022; 551:215960. [PMID: 36244575 DOI: 10.1016/j.canlet.2022.215960] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 09/30/2022] [Accepted: 10/08/2022] [Indexed: 11/26/2022]
Abstract
Hepatocellular carcinoma (HCC) is among the most common malignant cancers worldwide, with an increasing incidence associated with an increase in deaths due to liver cancer. HCC is typically detected at an advanced stage in patients with underlying liver dysfunction, resulting in high mortality. The identification of HCC-specific targets represents a desired but unmet need for liver cancer treatment. To identify potentially novel HCC therapeutic targets, we performed a secretome analysis using HCC spheroids. Sorbitol dehydrogenase (SORD) was identified as uniquely enriched in the secretomes and lysates derived from HCC spheroids, and high SORD expression in HCC tissues was associated with favorable effects on overall survival among patients with liver cancer. We found that the introduction of excess SORD in HCC cells inhibited tumor growth and stemness by enhancing necroptosis signal and bypassing energy-yielding pathways through regulation of lactate dehydrogenase A (LDHA) expression and mitochondrial dynamics. Treatment with human recombinant SORD (hrSORD) controlled HCC cell growth and regulated macrophage polarization in the tumor microenvironment. These results demonstrate that SORD plays critical functional roles in HCC suppression through polyol pathway-independent mechanisms, suggesting that targeting SORD expression might represent a promising therapeutic strategy for liver cancer therapy.
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Affiliation(s)
- Su-Yeon Lee
- Advanced Biomedical Research Laboratory, 16, Daewangpangyo-ro 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, South Korea
| | - Sanghwa Kim
- Advanced Biomedical Research Laboratory, 16, Daewangpangyo-ro 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, South Korea
| | - Yeonhwa Song
- Advanced Biomedical Research Laboratory, 16, Daewangpangyo-ro 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, South Korea
| | - Namjeong Kim
- Advanced Biomedical Research Laboratory, 16, Daewangpangyo-ro 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, South Korea
| | - Joohwan No
- Host-Parasite Research Laboratory, Institut Pasteur Korea, 16, Daewangpangyo-ro 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, South Korea
| | - Kang Mo Kim
- Department Gastroenterology, Asan Liver Center, Asan Medical Center, University of Ulsan College of Medicine, Olympic-ro 43-gil 88, Songpa-gu, Seoul, 05505, South Korea
| | - Haeng Ran Seo
- Advanced Biomedical Research Laboratory, 16, Daewangpangyo-ro 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, South Korea.
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4
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Mei N, Zhao N, Tian T, Jiao M, Li C. Biological features, gene expression profile, and mechanisms of drug resistance of two- and three-dimensional hepatocellular carcinoma cell cultures. Pharmacol Res Perspect 2021; 9:e00715. [PMID: 33486902 PMCID: PMC7827916 DOI: 10.1002/prp2.715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 12/21/2020] [Indexed: 12/21/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is a common malignant tumor with insidious onset and rapid progression. Its treatment is often difficult owing to tumor resistance. In this study, we aimed to understand the different biological characteristics, gene expression profiles, and drug resistance mechanisms of HCC cells cultured under different conditions. A conventional adherence method and a liquid overlay technique were used to prepare two- and three-dimensional cultures of Bel-7402 and 5-fluorouracil (5-Fu)-resistant Bel-7402 (Bel-7402/5-Fu) cells. Morphological characteristics were assessed via microscopy, and cell cycle distribution and apoptotic rate were obtained using flow cytometry. Cell sensitivity to different concentrations of drugs was detected with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays. Gene expression profiles and signal transduction pathways of Bel-7402 and Bel-7402/5-Fu cells under different culture conditions were determined using gene chips. Cells in three-dimensional culture were suspended and they grew into dense multicellular spheroid (MCS) structures, aggregating with each other. In contrast to cells in the two-dimensional culture, cell cycle arrest was observed in MCSs. The sensitivity of Bel-7402 cells in the two-dimensional culture to drugs at high concentrations was significantly higher than that of cells in the three-dimensional culture (p < .05). The apoptotic rate of Bel-7402 and Bel-7402/5-Fu cells was also higher in the two-dimensional culture (p < .05). Signal transduction pathway analysis showed that after Bel-7402 cells acquired resistance to 5-Fu, CCND1, MCM2, and MCM3 gene expression was upregulated in the G1 to S cell cycle control signal transduction pathway, CDKN1C and CCNG2 gene expression was downregulated, and MCM2 and MCM3 gene expression was upregulated in the DNA replication signal transduction pathway. Therefore, the liquid overlay technique is a simple, low-cost procedure to successfully construct three-dimensional culture models of HCC. This study provides new information and methods for exploring the molecular mechanisms of liver cancer resistance, clinical treatment, development of molecular information, and interventional prevention.
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Affiliation(s)
- Nan Mei
- Department of Medical OncologyThe First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi ProvincePeople’s Republic of China
| | - Ni Zhao
- Department of Medical OncologyThe First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi ProvincePeople’s Republic of China
| | - Tao Tian
- Department of Medical OncologyThe First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi ProvincePeople’s Republic of China
| | - Min Jiao
- Department of Medical OncologyThe First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi ProvincePeople’s Republic of China
| | - Chunli Li
- Department of Medical OncologyThe First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi ProvincePeople’s Republic of China
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5
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Sun D, Zong Y, Cheng J, Li Z, Xing L, Yu J. GINS2 attenuates the development of lung cancer by inhibiting the STAT signaling pathway. J Cancer 2021; 12:99-110. [PMID: 33391406 PMCID: PMC7738824 DOI: 10.7150/jca.46744] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 10/06/2020] [Indexed: 12/11/2022] Open
Abstract
GINS complex subunit 2 (GINS2) controls DNA replication. GINS2 expression is upregulated in several kinds of aggressive tumors. However, the effect of GINS2 in lung cancer remains unclear. We performed TCGA database analysis to confirm the clinical significance of GINS2 in lung cancer. After silencing GINS2 in A549 cells, we performed MTT assays, flow cytometry assays, colony formation assays, cell cycle analyses and RNA sequence analysis to elucidate the effect of GINS2 on lung cancer. Moreover, we assessed tumor growth and analyzed body fluorescence in mice as a measure of tumor burden. The TCGA database analysis demonstrated that GINS2 mRNA and protein was highly expressed in three kinds of lung cancer tissues. Subsequently, knockdown of GINS2 inhibited cell proliferation, colony formation, cell cycle arrest and apoptosis in A549 cells. On the other hand, we also investigated the effect of GINS2 on tumor formation in vivo. The analysis of nude mouse tumors showed that the tumor volume and weight of shGINS2 mice were significantly smaller than those of the control mice. To reveal the mechanism of GINS2 in lung cancer, we collected A549 cells with GINS2 knockdown to examine the downstream gene expression changes. The results showed that STAT1 and STAT2 mRNA and protein expression were significantly upregulated after GINS2 knockdown in A549 cells. Our results suggest that GINS2 inhibits the proliferation of lung cancer cells by inhibiting the STAT signaling pathway, which may be a potential biomarker for the diagnosis or prognosis of lung cancer.
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Affiliation(s)
- Dianmin Sun
- Department of Thoracic Surgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, China.,Shandong University, Jinan, Shandong 250117, China
| | - Yuanyuan Zong
- Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250117, China.,Shandong University, Jinan, Shandong 250117, China
| | - Jinling Cheng
- Department of Gastroenterology, Shandong Provincial Western Hospital, Jinan, Shandong 250117, China
| | - Zhenxiang Li
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 272173, China.,Shandong University, Jinan, Shandong 250117, China
| | - Ligang Xing
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 272173, China.,Shandong University, Jinan, Shandong 250117, China
| | - Jinming Yu
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 272173, China.,Shandong University, Jinan, Shandong 250117, China
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6
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Fröhlich E. Issues with Cancer Spheroid Models in Therapeutic Drug Screening. Curr Pharm Des 2020; 26:2137-2148. [PMID: 32067603 DOI: 10.2174/1381612826666200218094200] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/17/2020] [Indexed: 12/31/2022]
Abstract
In vitro screening for anti-cancer agents currently uses mainly cell lines in 2D culture. It is generally assumed that 3D culture, namely spheroids, represents physiologically more relevant models for tumors. Unfortunately, drug testing in spheroids is not as easy and reproducible as in 2D culture because there are factors that limit the universal use of spheroids as screening platforms. Technical problems in the generation of uniform spheroids, cell/tumor-specific differences in the ability to form spheroids, and more complex readout parameters are the main reasons for differences between spheroid data. The review discusses requirements for cancer spheroids to be representative models, suitable methodologies to generate spheroids for the screening and readout parameters for the evaluation of anti-cancer agents.
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Affiliation(s)
- Eleonore Fröhlich
- Center for Medical Research, Medical University of Graz, Graz, Austria
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7
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Allam RM, El-Halawany AM, Al-Abd AM. Chemo-sensitizing agents from natural origin for colorectal cancer: Pharmacodynamic and cellular pharmacokinetics approaches. DRUG RESISTANCE IN COLORECTAL CANCER: MOLECULAR MECHANISMS AND THERAPEUTIC STRATEGIES 2020:93-116. [DOI: 10.1016/b978-0-12-819937-4.00006-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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8
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Khawar IA, Park JK, Jung ES, Lee MA, Chang S, Kuh HJ. Three Dimensional Mixed-Cell Spheroids Mimic Stroma-Mediated Chemoresistance and Invasive Migration in hepatocellular carcinoma. Neoplasia 2018; 20:800-812. [PMID: 29981501 PMCID: PMC6034588 DOI: 10.1016/j.neo.2018.05.008] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 05/23/2018] [Accepted: 05/30/2018] [Indexed: 02/07/2023] Open
Abstract
Interactions between cancer cells and cancer-associated fibroblasts (CAFs) within the tumor microenvironment (TME) play an important role in promoting the profibrotic microenvironment and epithelial-mesenchymal transition (EMT), resulting in tumor progression and drug resistance in hepatocellular carcinoma (HCC). In the present study, we developed a mixed-cell spheroid model using Huh-7 HCC cells and LX-2 stellate cells to simulate the in vivo tumor environment with respect to tumor-CAF interactions. Spheroids were cultured from cancer cells alone (monospheroids) or as a mixture (mixed-cell spheroids) in ultra-low-attachment plates. Compact, well-mixed, and stroma-rich mixed-cell spheroids were successfully established with heterotypic cell-cell contacts shown by the presence of gap junctions and desmosomes. Mixed-cell spheroids showed enhanced expression of collagen type-I (Col‐I) and pro‐fibrotic factors such as, transforming growth factor beta1 (TGF-β1), and connective tissue growth factor (CTGF) compared to the levels expressed in mono-spheroids. The EMT phenotype was evident in mixed-cell spheroids as shown by the altered expression of E-cadherin and vimentin. Differential drug sensitivity was observed in mixed-cell spheroids, and only sorafenib and oxaliplatin showed dose-dependent antiproliferative effects. Simultaneous treatment with TGF-β inhibitors further improved sorafenib efficacy in the mixed-cell spheroids, indicating the involvement of TGF-β in the mechanism of sorafenib resistance. In 3D matrix invasion assay, mixed-cell spheroids exhibited fibroblast-led collective cell movement. Overall, our results provide evidence that mixed-cell spheroids formed with Huh-7 and LX-2 cells well represent HCC tumors and their TME in vivo and hence are useful in studying tumor-stroma interactions as mechanisms associated with drug resistance and increased cell motility.
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Affiliation(s)
- Iftikhar Ali Khawar
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jong Kook Park
- Department of Biomedical Science, Hallym University, Chuncheon, Republic of Korea
| | - Eun Sun Jung
- Department of Hospital Pathology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Myung Ah Lee
- Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Suhwan Chang
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Hyo-Jeong Kuh
- Department of Medical Life Sciences, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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9
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Ansong E, Ying Q, Ekoue DN, Deaton R, Hall AR, Kajdacsy-Balla A, Yang W, Gann PH, Diamond AM. Evidence that selenium binding protein 1 is a tumor suppressor in prostate cancer. PLoS One 2015; 10:e0127295. [PMID: 25993660 PMCID: PMC4436248 DOI: 10.1371/journal.pone.0127295] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 04/13/2015] [Indexed: 12/25/2022] Open
Abstract
Selenium-Binding Protein 1 (SBP1, SELENBP1, hSP56) is a selenium-associated protein shown to be at lower levels in tumors, and its lower levels are frequently predictive of a poor clinical outcome. Distinguishing indolent from aggressive prostate cancer is a major challenge in disease management. Associations between SBP1 levels, tumor grade, and disease recurrence following prostatectomy were investigated by duplex immunofluorescence imaging using a tissue microarray containing tissue from 202 prostate cancer patients who experienced biochemical (PSA) recurrence after prostatectomy and 202 matched control patients whose cancer did not recur. Samples were matched by age, ethnicity, pathological stage and Gleason grade, and images were quantified using the Vectra multispectral imaging system. Fluorescent labels were targeted for SBP1 and cytokeratins 8/18 to restrict scoring to tumor cells, and cell-by-cell quantification of SBP1 in the nucleus and cytoplasm was performed. Nuclear SBP1 levels and the nuclear to cytoplasm ratio were inversely associated with tumor grade using linear regression analysis. Following classification of samples into quartiles based on the SBP1 levels among controls, tumors in the lowest quartile were more than twice as likely to recur compared to those in any other quartile. Inducible ectopic SBP1 expression reduced the ability of HCT-116 human tumor cells to grow in soft agar, a measure of transformation, without affecting proliferation. Cells expressing SBP1 also demonstrated a robust induction in the phosphorylation of the p53 tumor suppressor at serine 15. These data indicate that loss of SBP1 may play an independent contributing role in prostate cancer progression and its levels might be useful in distinguishing indolent from aggressive disease.
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Affiliation(s)
- Emmanuel Ansong
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- * E-mail:
| | - Qi Ying
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
- Department of Pathology, Xinxiang Medical University, Xinxiang, China
| | - Dede N. Ekoue
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Ryan Deaton
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Andrew R. Hall
- University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Andre Kajdacsy-Balla
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Wancai Yang
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Pathology, Xinxiang Medical University, Xinxiang, China
| | - Peter H. Gann
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Alan M. Diamond
- Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America
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10
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Kim SA, Kim I, Yoon SK, Lee EK, Kuh HJ. Indirect modulation of sensitivity to 5-fluorouracil by microRNA-96 in human colorectal cancer cells. Arch Pharm Res 2014; 38:239-48. [PMID: 25502560 DOI: 10.1007/s12272-014-0528-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 12/03/2014] [Indexed: 12/14/2022]
Abstract
5-FU is an anticancer drug that is widely used to treat cancers, including colorectal cancer (CRC); however, chemoresistance to 5-FU remains an important problem to be resolved. The role of microRNAs (miRs) in chemosensitivity has recently been studied in the development of therapeutic strategies to overcome drug resistance. Here, we focused on miR-96, which has been reported to demonstrate chemosensitivity. We investigated whether 5-FU sensitivity may be modulated by miR-96 in monolayer cells and whether this relationship also applies for drug resistance in 3D tumor spheroids (TSs). When the level of miR-96 increased, the expression of the anti-apoptotic regulator XIAP and p53 stability regulator UBE2N decreased, resulting in increased apoptosis and growth inhibition following 5-FU exposure. Transfection of miR-96 inhibitors resulted in an overexpression of XIAP and UBE2N, yet only minimal change was induced in apoptosis. Nonetheless, luciferase assay failed to show direct interactions between miR-96 and these genes. In TSs, 5-FU resistance corresponded to a significantly lower level of miR-96, however only XIAP, not UBE2N, was up-regulated demonstrating partial agreement with the 2D condition regarding target expression. Overall, these results suggest that miR-96 may modulate 5-FU sensitivity in CRC cells by promoting apoptosis; however, differential expression of target genes in TSs warrants further studies on the 5-FU resistance mechanism under 3D conditions.
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Affiliation(s)
- Sun-Ah Kim
- Department of Medical Lifesciences, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, Republic of Korea,
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