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Iman H, Benjamin A, Peyton K, Habbit NL, Ahmed B, Heslin MJ, Mobley JA, Greene MW, Lipke EA. Engineered colorectal cancer tissue recapitulates key attributes of a patient-derived xenograft tumor line. Biofabrication 2022; 14:10.1088/1758-5090/ac73b6. [PMID: 35617932 PMCID: PMC9822569 DOI: 10.1088/1758-5090/ac73b6] [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: 12/10/2021] [Accepted: 05/26/2022] [Indexed: 01/11/2023]
Abstract
The development of physiologically relevantin vitrocolorectal cancer (CRC) models is vital for advancing understanding of tumor biology. Although CRC patient-derived xenografts (PDXs) recapitulate key patient tumor characteristics and demonstrate high concordance with clinical outcomes, the use of thisin vivomodel is costly and low-throughput. Here we report the establishment and in-depth characterization of anin vitrotissue-engineered CRC model using PDX cells. To form the 3D engineered CRC-PDX (3D-eCRC-PDX) tissues, CRC PDX tumors were expandedin vivo, dissociated, and the isolated cells encapsulated within PEG-fibrinogen hydrogels. Following PEG-fibrinogen encapsulation, cells remain viable and proliferate within 3D-eCRC-PDX tissues. Tumor cell subpopulations, including human cancer and mouse stromal cells, are maintained in long-term culture (29 days); cellular subpopulations increase ratiometrically over time. The 3D-eCRC-PDX tissues mimic the mechanical stiffness of originating tumors. Extracellular matrix protein production by cells in the 3D-eCRC-PDX tissues resulted in approximately 57% of proteins observed in the CRC-PDX tumors also being present in the 3D-eCRC-PDX tissues on day 22. Furthermore, we show congruence in enriched gene ontology molecular functions and Hallmark gene sets in 3D-eCRC-PDX tissues and CRC-PDX tumors compared to normal colon tissue, while prognostic Kaplan-Meier plots for overall and relapse free survival did not reveal significant differences between CRC-PDX tumors and 3D-eCRC-PDX tissues. Our results demonstrate high batch-to-batch consistency and strong correlation between ourin vitrotissue-engineered PDX-CRC model and the originatingin vivoPDX tumors, providing a foundation for future studies of disease progression and tumorigenic mechanisms.
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Affiliation(s)
- Hassani Iman
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Anbiah Benjamin
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Kuhlers Peyton
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, AL 36849, USA
| | - Nicole L. Habbit
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Bulbul Ahmed
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, AL 36849, USA
| | - Martin J. Heslin
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | - James A. Mobley
- Department of Anesthesiology and Perioperative Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35205-3703, USA,Division of Molecular and Translational Biomedicine, School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35205-3703, USA
| | - Michael W. Greene
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, AL 36849, USA,Co-corresponding authors Elizabeth A. Lipke, , Michael W. Greene,
| | - Elizabeth A. Lipke
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA,Co-corresponding authors Elizabeth A. Lipke, , Michael W. Greene,
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2
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Gupta P, Rizvi SZ, Lal N, Gupta V, Srivastav AN, Musa O. Expression of CD44 and CD133 stem cell markers in squamous cell carcinoma of esophagus. INDIAN J PATHOL MICR 2021; 64:472-478. [PMID: 34341256 DOI: 10.4103/ijpm.ijpm_682_20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Context Role of cancer stem cells in the esophageal carcinogenesis is not clear. Aim To assess the expression of CD44 and CD133 cancer stem cell markers in esophageal squamous cell carcinoma (ESCC) and its predisposing lesions by immunohistochemistry. Setting and Design Prospective study as a part of an intramural research project. Materials and Methods Tissues samples were obtained with endoscopic biopsy and from surgically resected esophageal specimens. Fifty cases each of histopathologically diagnosed cases of esophageal squamous cell carcinoma and its predisposing lesions (mild, moderate, and severe dysplasia and esophagitis) were evaluated for stem cell marker CD44 and C133 by immunohistochemistry using a scoring system. Statistical Analysis Chi-square test, analysis of variance (ANOVA), post-hoc tests (Tukey-HSD) were used as appropriate for data analysis. Two sided P < 0.05 was considered as significant. Results CD44 expression was significantly higher in ESCC as compared to dysplasia and esophagitis (mean IS 7.92 ± 1.45 vs. 6.34 ± 0.80 vs 5.15 ± 0.86 respectively, P < 0.001). CD133 expression was also significantly higher in ESCC as compared to dysplasia (mean IS 6.82 ± 1.57 vs. 1.00 ± 0.00 respectively, P < 0.001) while esophagitis showed no expression. CD44 and CD133 expressions were significantly higher in poorly differentiated ESCC than moderately differentiated and well differentiated lesions (CD44 mean IS 6.94 ± 1.44 vs 8.17 ± 1.38 vs. 8.63 ± 1.02 respectively, P < 0.001 and CD 133 mean IRS 5.63 ± 0.81 vs 6.00 ± 00 vs. 9.0 ± 00 respectively, P < 0.001). Conclusion Significantly higher expression of CD44 and CD133 cancer stem cell markers in ESCC as compared to its predisposing lesions (esophagitis and dysplasia) suggests its role in esophageal carcinogenesis.
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Affiliation(s)
- Parul Gupta
- Department of Pathology, Era's Lucknow Medical College and Hospital, Era University, Lucknow, Uttar Pradesh, India
| | - Sania Z Rizvi
- Department of Pathology, Era's Lucknow Medical College and Hospital, Era University, Lucknow, Uttar Pradesh, India
| | - Nirupma Lal
- Department of Pathology, Era's Lucknow Medical College and Hospital, Era University, Lucknow, Uttar Pradesh, India
| | - Vishal Gupta
- Department of Surgical Gastroenterology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Anand N Srivastav
- Director Research, Era's Lucknow Medical College and Hospital, Era University, Lucknow, Uttar Pradesh, India
| | - Osman Musa
- Department of Surgery, Era's Lucknow Medical College and Hospital, Era University, Lucknow, Uttar Pradesh, India
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Rezaee M, Gheytanchi E, Madjd Z, Mehrazma M. Clinicopathological Significance of Tumor Stem Cell Markers ALDH1 and CD133 in Colorectal Carcinoma. IRANIAN JOURNAL OF PATHOLOGY 2020; 16:40-50. [PMID: 33391379 PMCID: PMC7691712 DOI: 10.30699/ijp.2020.127441.2389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 09/23/2020] [Indexed: 12/15/2022]
Abstract
Background & Objective: Colorectal cancer (CRC) is the third most common cancer worldwide with a high mortality rate. The main causes of death in patients are recurrence and metastasis which are mainly attributed to the small subpopulation of cells within tumors called cancer stem cells (CSCs). This study aimed to evaluate the correlation between the expression of ALDH1 and CD133 as CSC associated markers and clinicopathological characteristics in CRC. Methods: In this cross-sectional study, a total of 483 CRC tumor samples were immunohistochemically stained for detection of CD133 and ALDH1 markers. Correlations of marker expression with clinicopathological factors were also evaluated. Results: There was a significant correlation between the luminal intensity of CD133 and neural invasion (P=0.05) and between the cytoplasmic intensity of CD133 and metastasis (P=0.05). In terms of H-score, a positive significant relation was observed between cytoplasmic expression of CD133 and lymph node (P=0.02), neural (P=0.04) and vascular invasion (P=0.02). The ALDH1 cytoplasmic expression showed a significant correlation with tumor size (P=0.001). Conclusion: Our findings showed that increased expression of CD133 and ALDH1 is associated with tumor progression and worse outcomes in CRC patients. These markers can be good candidates for localized targeting of CSCs using antibodies. Future researches need to be improved approaches for early detection of CRC, and treatment monitoring for CRC and other cancers.
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Affiliation(s)
- Maryam Rezaee
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Elmira Gheytanchi
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Madjd
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mitra Mehrazma
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Pathology, Hasheminejad Kidney Center, Iran University of Medical Sciences, Tehran, Iran
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4
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Roudi R, Barodabi M, Madjd Z, Roviello G, Corona SP, Panahei M. Expression patterns and clinical significance of the potential cancer stem cell markers OCT4 and NANOG in colorectal cancer patients. Mol Cell Oncol 2020; 7:1788366. [PMID: 32944642 DOI: 10.1080/23723556.2020.1788366] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Colorectal cancer (CRC) is one of the most important malignancies and causes of cancer-related deaths worldwide. Cancer stem cell markers identification could be helpful to acquire important prognostic information and develop new treatment regimens. This study aimed to evaluate the expression of OCT4 and NANOG in CRC patients and their clinical significance. Totally 359 CRC samples were stained for OCT4 and NANOG expression using tissue microarray. The correlation between their expression and clinical and pathological features was explored. The majority of CRC cases showed low-level expression of OCT4 (80%) and NANOG (75%). Lower expression of OCT4 was more often detected in CRC cases with no vascular involvement (P = .01). Also, a trend found between low level of OCT4 expression and absence of distant metastasis or lymph node involvement (P = .07 and P = .09, respectively). Surprisingly, a significant positive correlation was observed between NANOG expression and cellular differentiation (P = .05). Our combined analysis demonstrated that OCT4 low/NANOG low phenotype has frequently seen in colorectal cancer cases with no vascular invasion (P = .05). Our observations indicated that higher expression of OCT4 and NANOG can confer malignant and aggressive behavior to CRC. Evaluation of the co-expression of these cancer stem cell markers can serve a new diagnostic and prognostic approach in CRC patients. These findings also suggested that simultaneous expression of OCT4 and NANOG can be considered as a therapeutic marker for targeted therapy of CRC, especially in advanced stages.
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Affiliation(s)
- Raheleh Roudi
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Mahboubeh Barodabi
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Pathology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Madjd
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Pathology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | | | - Silvia Paola Corona
- Department of Medical, Surgical and Health Sciences, University of Trieste, Cattinara Hospital, Trieste
| | - Mahshid Panahei
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Pathology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Department of Pathology, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran
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The Emerging Role of NANOG as an Early Cancer Risk Biomarker in Patients with Oral Potentially Malignant Disorders. J Clin Med 2019; 8:jcm8091376. [PMID: 31484317 PMCID: PMC6780631 DOI: 10.3390/jcm8091376] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/28/2019] [Accepted: 08/30/2019] [Indexed: 12/12/2022] Open
Abstract
NANOG, a key regulator of pluripotency and self-renewal in embryonic and adult stem cells, is frequently overexpressed in multiple cancers, including oral squamous cell carcinoma (OSCC). It has been frequently associated with poor outcomes in epithelial cancers, and recently implicated in laryngeal tumorigenesis. On this basis, we investigated the role of NANOG protein expression as an early cancer risk biomarker in oral potentially malignant disorders (OPMD), and the impact on prognosis and disease outcomes in OSCC patients. NANOG expression was evaluated by immunohistochemistry in 55 patients with oral epithelial dysplasia, and 125 OSCC patients. Correlations with clinical and follow-up data were assessed. Nuclear NANOG expression was detected in 2 (3.6%) and cytoplasmic NANOG expression in 9 (16.4%) oral dysplasias. NANOG expression increased with the grade of dysplasia. Cytoplasmic NANOG expression and the histopathological grading were significantly correlated with oral cancer risk, although dysplasia grading was the only significant independent predictor of oral cancer development in multivariate analyses. Cytoplasmic NANOG expression was also detected in 39 (31%) OSCC samples. Positive NANOG expression was significantly associated with tobacco and alcohol consumption, and was more frequent in pN0 tumors, early I-II stages. These data unveil the clinical relevance of NANOG in early stages of OSCC tumorigenesis rather than in advanced neoplastic disease. NANOG expression emerges as an early predictor of oral cancer risk in patients with OPMD.
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6
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Voutsadakis IA. The pluripotency network in colorectal cancer pathogenesis and prognosis: an update. Biomark Med 2019; 12:653-665. [PMID: 29944017 DOI: 10.2217/bmm-2017-0369] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Stemness characteristics are defining properties of cancer initiating cells and are associated with the ability to metastasize and survive in hostile environments. Establishment of the stem cell network depends on the action of a set of core transcription factors that work in concert with other ancillary proteins that are also important during embryonic development. New data consolidate the role of core pluripotency transcription factors OCT4, SOX2 and NANOG as adverse prognostic factors in colorectal cancer. mRNA-binding proteins LIN28 and Musashi, that are associated with stemness, and epigenetic modifiers such as de-acetylase SIRT1 may also have prognostic value in colorectal cancer. This paper provides an update of the stem cell factors in the pathogenesis and prognosis of colorectal cancer.
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Affiliation(s)
- Ioannis A Voutsadakis
- Algoma District Cancer Program, Sault Area Hospital, Sault Ste Marie, Ontario, Canada.,Division of Clinical Sciences, Northern Ontario School of Medicine, Sudbury, Ontario, Canada
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7
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Zhao L, Liu J, Chen S, Fang C, Zhang X, Luo Z. Prognostic significance of NANOG expression in solid tumors: a meta-analysis. Onco Targets Ther 2018; 11:5515-5526. [PMID: 30233213 PMCID: PMC6134963 DOI: 10.2147/ott.s169593] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Purpose NANOG is a tumor marker and indicates poor prognosis in various neoplasms; however, the evidence is controversial. This meta-analysis investigated the association of NANOG expression and clinicopathological features, and it impact on survival of patients with malignant tumors. Methods Studies published through May 31, 2018 were retrieved from PubMed, Web of Science, Embase, and the China National Knowledge Infrastructure. Two researchers independently screened the content and quality of studies and extracted data. Correlations of NANOG expression, clinicopathological variables, and survival were analyzed and the combined odds ratios (ORs) and hazard ratios (HRs) with 95% confidence intervals (95% CIs) were calculated. Results Thirty-three articles including 35 data sets of 3,959 patients were analyzed. Overall, elevated NANOG expression was associated with poor overall survival (HR = 2.19; 95% CI: 1.87–2.58, P<0.001) and poor disease-free survival (HR = 2.21, 95% CI: 1.54–3.18, P<0.001). Subgroup analysis found that NANOG expression was associated with worse overall survival in non–small cell lung (HR = 1.87; 95% CI: 1.26–2.76, P = 0.002), head and neck (HR = 2.29; 95% CI: 1.75–3.02, P<0.001), and digestive system (HR = 2.38; 95% CI: 1.95–2.91, P<0.001) cancers. Moreover, we found that high NANOG expression was associated with poor tumor differentiation (OR = 2.63; 95% CI: 1.59–4.55, P = 0.001), lymph node metastasis (OR = 2.59; 95% CI: 1.50–4.47, P = 0.001), advanced TNM stage (OR = 2.22; 95% CI: 1.42–3.45, P<0.001), and T stage (OR = 0.44; 95% CI: 0.20–0.93, P = 0.031). Conclusion The evidence supports NANOG as a tumor biomarker to guide clinical management and indicate prognosis. Additional studies are needed to further validate these results.
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Affiliation(s)
- Lingqiong Zhao
- Department of Oncology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China,
| | - Jie Liu
- Department of Cardiology, The Affiliated Hospital of North Sichuan Medical College, Sichuan 637000, China
| | - Shu Chen
- Department of Oncology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China,
| | - Chun Fang
- Department of Oncology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China,
| | - Xianquan Zhang
- Department of Oncology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China,
| | - Zhibin Luo
- Department of Oncology, Chongqing General Hospital, Chongqing 400010, China,
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8
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Huang R, Mo D, Wu J, Ai H, Lu Y. CD133 expression correlates with clinicopathologic features and poor prognosis of colorectal cancer patients: An updated meta-analysis of 37 studies. Medicine (Baltimore) 2018; 97:e10446. [PMID: 29879012 PMCID: PMC5999490 DOI: 10.1097/md.0000000000010446] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND CD133 has been identified as a putative cancer stem cell marker in colorectal cancer (CRC). However, the clinicopathological and prognostic significance of CD133 in CRC patients remains controversial. Thus, we conducted a meta-analysis to quantitatively evaluate the above issues. METHODS We collected a comprehensive literature search from PubMed, Web of Science, and Embase database up to September 20, 2016 examining CD133 and clinical features of colorectal cancer patients. We used the odds ratio (OR) with 95% confidence interval (CI) to estimate the effects by overall and stratified analysis. RESULTS The overall result of our meta-analysis indicated that CD133 expression was positively correlated with T category, distant metastasis, lymphatic invasion, and vascular invasion. Moreover, patients with higher CD133 expression had a poorer overall survival (OS) (HR=2.01, P < .001) and a lower 5-year OS rate (OR = 3.26, P < .001) than those with lower expression. Disease-free survival (DFS) and 5-year DFS rate were similar with the above results. Though the correlation between CD133 expression with the clinical characteristic was not positive in some ways when we analyzed the different subgroup. The prognostic value of CD133 expression for 5-year OS rate of CRC patients was noticeable in spite of different patients' region, multiple antibodies used in studies, various cut-off values of CD133 expression, and adjuvant therapy situation of patients. CONCLUSION CD133 is a useful predictive or prognostic biomarker for CRC in clinical assessment and may serve as a potential therapeutic target for CRC.
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Affiliation(s)
| | - Dan Mo
- Department of Surgery, Maternal and Child Health Hospital of The Guangxi Zhuang Autonomous Region, Nanning, Guangxi
| | - Junrong Wu
- Department of Clinical Laboratory, The Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Huaying Ai
- Department of Injection Room, The People's Hospital of Yingtan City, Yingtan, Jiangxi
| | - Yiping Lu
- Department of Clinical Laboratory, The Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi, China
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9
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CD133 expression may be useful as a prognostic indicator in colorectal cancer, a tool for optimizing therapy and supportive evidence for the cancer stem cell hypothesis: a meta-analysis. Oncotarget 2017; 7:10023-36. [PMID: 26840260 PMCID: PMC4891101 DOI: 10.18632/oncotarget.7054] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 12/08/2015] [Indexed: 12/14/2022] Open
Abstract
We performed a meta-analysis of CD133-related clinical data to investigate the role of cancer stem cells (CSCs) in the clinical outcomes of colorectal cancer (CRC) patients, analyzing the effectiveness of various therapeutic strategies and examining the validity of the CSC hypothesis. For 28 studies (4546 patients), the relative risk (RR) to survival outcomes associated with CD133+ CRCs were calculated using STATA 12.0 software. Pooled results showed that CD133High patients had poor 5-year overall survival (RR 0.713, 95% CI 0·616-0·826) and 5-year disease free survival (RR 0·707, 95% CI 0·602-0·831). Both associations were consistently observed across different races, research techniques and therapeutic strategies. In a subgroup receiving adjuvant therapy, CD133Low patients achieved significantly better survival than CD133High patients. The findings suggest that CD133 could serve as a predictive marker of poor prognosis and treatment failure in CRC. CD133Low patients could benefit from adjuvant treatments, while CD133High patients should be given novel treatments besides adjuvant therapy. Our results also provide evidence in support of the CSC hypothesis.
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10
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Miller TJ, McCoy MJ, Hemmings C, Bulsara MK, Iacopetta B, Platell CF. Objective analysis of cancer stem cell marker expression using immunohistochemistry. Pathology 2016; 49:24-29. [PMID: 27913042 DOI: 10.1016/j.pathol.2016.09.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 08/08/2016] [Accepted: 09/14/2016] [Indexed: 12/14/2022]
Abstract
Analysis of immunohistochemical expression is often a subjective and semiquantitative process that can lead to the inconsistent reporting of results. To assess the effect that region selection and quantification method have on results, five different cancer stem cell markers were used in this study to compare tissue scoring with digital analysis methods that used three different tissue annotation methods. Samples of tumour and normal mucosa were used from 10 consecutive stage II colon cancer patients and stained for the putative cancer stem cell markers ALDH1, CD44v6, CD133, Lgr5 and SOX2. Tissue scoring was found to have considerably different results to digital analysis with the three different digital methods harbouring concordant results overall. However, SOX2 on normal tissue and CD133 on tumour and normal tissue produced discordant results which could be attributed to the different regions of tissue that were analysed. It is important that quantification method and selection of analysis areas are considered as part of study design to ensure that reproducible and consistent results are reported in the literature.
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Affiliation(s)
- T J Miller
- School of Surgery, University of Western Australia, Nedlands, Australia; Colorectal Research Unit, St John of God Subiaco Hospital, Subiaco, Australia.
| | - M J McCoy
- Colorectal Research Unit, St John of God Subiaco Hospital, Subiaco, Australia; School of Medicine and Pharmacology, University of Western Australia, Nedlands, Australia
| | - C Hemmings
- School of Surgery, University of Western Australia, Nedlands, Australia; St John of God Pathology, Subiaco, Australia
| | - M K Bulsara
- Institute for Health Research, University of Notre Dame, Fremantle, Australia
| | - B Iacopetta
- School of Surgery, University of Western Australia, Nedlands, Australia
| | - C F Platell
- School of Surgery, University of Western Australia, Nedlands, Australia; Colorectal Research Unit, St John of God Subiaco Hospital, Subiaco, Australia
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Stacer AC, Wang H, Fenner J, Dosch JS, Salomonnson A, Luker KE, Luker GD, Rehemtulla A, Ross BD. Imaging Reporters for Proteasome Activity Identify Tumor- and Metastasis-Initiating Cells. Mol Imaging 2015; 14:414-428. [PMID: 26431589 PMCID: PMC4663702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
Tumor-initiating cells, also designated as cancer stem cells, are proposed to constitute a subpopulation of malignant cells central to tumorigenesis, metastasis, and treatment resistance. We analyzed the activity of the proteasome, the primary organelle for targeted protein degradation, as a marker of tumor- and metastasis-initiating cells. Using human and mouse breast cancer cells expressing a validated fluorescent reporter, we found a small subpopulation of cells with low proteasome activity that divided asymmetrically to produce daughter cells with low or high proteasome activity. Breast cancer cells with low proteasome activity had greater local tumor formation and metastasis in immunocompromised and immunocompetent mice. To allow flexible labeling of cells, we also developed a new proteasome substrate based on HaloTag technology. Patient-derived glioblastoma cells with low proteasome activity measured by the HaloTag reporter show key phenotypes associated with tumor-initiating cells, including expression of a stem cell transcription factor, reconstitution of the original starting population, and enhanced neurosphere formation. We also show that patient-derived glioblastoma cells with low proteasome activity have higher frequency of tumor formation in mouse xenografts. These studies support proteasome function as a tool to investigate tumor- and metastasis-initiating cancer cells and a potential biomarker for outcomes in patients with several different cancers.
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Affiliation(s)
- Amanda C. Stacer
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Hanxiao Wang
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
- Department of Radiation Oncology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Joseph Fenner
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Joseph S. Dosch
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Anna Salomonnson
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Kathryn E. Luker
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Gary D. Luker
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
- Department of Biomedical Engineering, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Alnawaz Rehemtulla
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
- Department of Radiation Oncology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
| | - Brian D. Ross
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA 48109-2200
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