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Yehya A, Youssef J, Hachem S, Ismael J, Abou-Kheir W. Tissue-specific cancer stem/progenitor cells: Therapeutic implications. World J Stem Cells 2023; 15:323-341. [PMID: 37342220 PMCID: PMC10277968 DOI: 10.4252/wjsc.v15.i5.323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/14/2023] [Accepted: 04/12/2023] [Indexed: 05/26/2023] Open
Abstract
Surgical resection, chemotherapy, and radiation are the standard therapeutic modalities for treating cancer. These approaches are intended to target the more mature and rapidly dividing cancer cells. However, they spare the relatively quiescent and intrinsically resistant cancer stem cells (CSCs) subpopulation residing within the tumor tissue. Thus, a temporary eradication is achieved and the tumor bulk tends to revert supported by CSCs' resistant features. Based on their unique expression profile, the identification, isolation, and selective targeting of CSCs hold great promise for challenging treatment failure and reducing the risk of cancer recurrence. Yet, targeting CSCs is limited mainly by the irrelevance of the utilized cancer models. A new era of targeted and personalized anti-cancer therapies has been developed with cancer patient-derived organoids (PDOs) as a tool for establishing pre-clinical tumor models. Herein, we discuss the updated and presently available tissue-specific CSC markers in five highly occurring solid tumors. Additionally, we highlight the advantage and relevance of the three-dimensional PDOs culture model as a platform for modeling cancer, evaluating the efficacy of CSC-based therapeutics, and predicting drug response in cancer patients.
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Affiliation(s)
- Amani Yehya
- Department of Anatomy, Cell Biology and Physiological Sciences, American University of Beirut, Beirut 1107-2020, Lebanon
| | - Joe Youssef
- Department of Anatomy, Cell Biology and Physiological Sciences, American University of Beirut, Beirut 1107-2020, Lebanon
| | - Sana Hachem
- Department of Anatomy, Cell Biology and Physiological Sciences, American University of Beirut, Beirut 1107-2020, Lebanon
| | - Jana Ismael
- Department of Anatomy, Cell Biology and Physiological Sciences, American University of Beirut, Beirut 1107-2020, Lebanon
| | - Wassim Abou-Kheir
- Department of Anatomy, Cell Biology and Physiological Sciences, American University of Beirut, Beirut 1107-2020, Lebanon
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Ipek E, Epikmen ET, Yildirim F, Ozsoy SY, Tunca R. Immunolabelling of SCF and c-KIT in canine perianal gland tumours. J Comp Pathol 2023; 200:51-58. [PMID: 36652776 DOI: 10.1016/j.jcpa.2022.11.007] [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: 07/24/2022] [Revised: 09/02/2022] [Accepted: 10/29/2022] [Indexed: 01/18/2023]
Abstract
c-KIT and its ligand stem cell factor (SCF) play a direct role in the oncogenesis of various cancers by regulating the cell fate. Recent evidence indicates that an increased expression of c-KIT/SCF, driven by hormonal imbalances, is an important step in the development of hormone-dependent cancers. We investigated the possible role of the c-KIT/SCF system in the carcinogenesis in 44 perianal gland tumours (16 adenomas, 15 epitheliomas and 13 carcinomas) and 10 normal perianal gland tissues by assessing the percentage and type of cells that expressed c-KIT and SCF as well as the cellular localization of immunoreactivity. No differences in immunolabelling of SCF were found between normal glands and neoplastic cells of any histotype. The highest expression of c-KIT was seen in carcinomas and a positive correlation was found between c-KIT labelling score and mitotic index (R = 0.876; P <0.01). c-KIT labelling patterns in hepatoid cells varied among the tumour histotypes with adenomas having only membranous labelling. Three labelling patterns (membranous only, membranous and cytosolic, and cytosolic only) were seen in the other tumour histotypes. Cytosolic labelling was statistically more frequent in carcinomas than in adenomas (P <0.001). These findings suggest that c-KIT expression and its cellular localization may play a role in the development and progression of perianal gland tumours by influencing cell proliferation.
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Affiliation(s)
- Emrah Ipek
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey.
| | - Erkmen T Epikmen
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey
| | - Funda Yildirim
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Sule Y Ozsoy
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey
| | - Recai Tunca
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey
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Cellular signals integrate cell cycle and metabolic control in cancer. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2023; 135:397-423. [PMID: 37061338 DOI: 10.1016/bs.apcsb.2023.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Growth factors are the small peptides that can promote growth, differentiation, and survival of most living cells. However, aberrant activation of receptor tyrosine kinases by GFs can generate oncogenic signals, resulting in oncogenic transformation. Accumulating evidence support a link between GF/RTK signaling through the major signaling pathways, Ras/Erk and PI3K/Akt, and cell cycle progression. In response to GF signaling, the quiescent cells in the G0 stage can re-enter the cell cycle and become the proliferative stage. While in the proliferative stage, tumor cells undergo profound changes in their metabolism to support biomass production and bioenergetic requirements. Accumulating data show that the cell cycle regulators, specifically cyclin D, cyclin B, Cdk2, Cdk4, and Cdk6, and anaphase-promoting complex/cyclosome (APC/C-Cdh1) play critical roles in modulating various metabolic pathways. These cell cycle regulators can regulate metabolic enzyme activities through post-translational mechanisms or the transcriptional factors that control the expression of the metabolic genes. This fine-tune control allows only the relevant metabolic pathways to be active in a particular phase of the cell cycle, thereby providing suitable amounts of biosynthetic precursors available during the proliferative stage. The imbalance of metabolites in each cell cycle phase can induce cell cycle arrest followed by p53-induced apoptosis.
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4
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Wolf I, Gratzke C, Wolf P. Prostate Cancer Stem Cells: Clinical Aspects and Targeted Therapies. Front Oncol 2022; 12:935715. [PMID: 35875084 PMCID: PMC9304860 DOI: 10.3389/fonc.2022.935715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 06/13/2022] [Indexed: 11/13/2022] Open
Abstract
Despite decades of research and successful improvements in diagnosis and therapy, prostate cancer (PC) remains a major challenge. In recent years, it has become clear that PC stem cells (PCSCs) are the driving force in tumorigenesis, relapse, metastasis, and therapeutic resistance of PC. In this minireview, we discuss the impact of PCSCs in the clinical practice. Moreover, new therapeutic approaches to combat PCSCs are presented with the aim to achieve an improved outcome for patients with PC.
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Affiliation(s)
- Isis Wolf
- Department of Urology, Medical Center-University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christian Gratzke
- Department of Urology, Medical Center-University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Philipp Wolf
- Department of Urology, Medical Center-University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
- *Correspondence: Philipp Wolf,
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Foster BM, Shi L, Harris KS, Patel C, Surratt VE, Langsten KL, Kerr BA. Bone Marrow-Derived Stem Cell Factor Regulates Prostate Cancer-Induced Shifts in Pre-Metastatic Niche Composition. Front Oncol 2022; 12:855188. [PMID: 35515124 PMCID: PMC9063312 DOI: 10.3389/fonc.2022.855188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
Skeletal metastasis is the leading cause of morbidity and mortality in prostate cancer, with 80% of advanced prostate cancer patients developing bone metastases. Before metastasis, bone remodeling occurs, stimulating pre-metastatic niche formation and bone turnover, and platelets govern this process. Stem cell factor (SCF, Kit Ligand) is increased in advanced prostate cancer patient platelet releasates. Further, SCF and its receptor, CD117/c-kit, correlate with metastatic prostate cancer severity. We hypothesized that bone-derived SCF plays an important role in prostate cancer tumor communication with the bone inducing pre-metastatic niche formation. We generated two cell-specific SCF knockout mouse models deleting SCF in either mature osteoblasts or megakaryocytes and platelets. Using two syngeneic androgen-insensitive murine prostate cancer cell lines, RM1 (Ras and Myc co-activation) and mPC3 (Pten and Trp53 deletion), we examined the role of bone marrow-derived SCF in primary tumor growth and bone microenvironment alterations. Platelet-derived SCF was required for mPC3, but not RM1, tumor growth, while osteoblast-derived SCF played no role in tumor size in either cell line. While exogenous SCF induced proangiogenic protein secretion by RM1 and mPC3 prostate cancer cells, no significant changes in tumor angiogenesis were measured by immunohistochemistry. Like our previous studies, tumor-induced bone formation occurred in mice bearing RM1 or mPC3 neoplasms, demonstrated by bone histomorphometry. RM1 tumor-bearing osteoblast SCF knockout mice did not display tumor-induced bone formation. Bone stromal cell composition analysis by flow cytometry showed significant shifts in hematopoietic stem cell (HSC), mesenchymal stem cell (MSC), and osteoblast cell percentages in mice bearing RM1 or mPC3 tumors. There were no significant changes in the percentage of macrophages, osteoclasts, or osteocytes. Our study demonstrates that megakaryocyte/platelet-derived SCF regulates primary mPC3 tumor growth, while SCF originating from osteoblasts plays a role in bone marrow-derived progenitor cell composition and pre-metastatic niche formation. Further, we show that both the source of SCF and the genetic profile of prostate cancer determine the effects of SCF. Thus, targeting the SCF/CD117 signaling axis with tyrosine kinase inhibitors could affect primary prostate carcinomas or play a role in reducing bone metastasis dependent on the gene deletions or mutations driving the patients' prostate cancer.
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Affiliation(s)
- Brittni M. Foster
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Lihong Shi
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Koran S. Harris
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Chirayu Patel
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Victoria E. Surratt
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Kendall L. Langsten
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Bethany A. Kerr
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, United States
- Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC, United States
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Jaffar FHF, Osman K, Hui CK, Zulkefli AF, Ibrahim SF. Long-Term Wi-Fi Exposure From Pre-Pubertal to Adult Age on the Spermatogonia Proliferation and Protective Effects of Edible Bird’s Nest Supplementation. Front Physiol 2022; 13:828578. [PMID: 35360230 PMCID: PMC8963498 DOI: 10.3389/fphys.2022.828578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 02/07/2022] [Indexed: 11/13/2022] Open
Abstract
Children are vulnerable to the radiofrequency radiation (RFR) emitted by Wi-Fi devices. Nevertheless, the severity of the Wi-Fi effect on their reproductive development has been sparsely available. Therefore, this study was conducted to evaluate the Wi-Fi exposure on spermatogonia proliferation in the testis. This study also incorporated an approach to attenuate the effect of Wi-Fi by giving concurrent edible bird’s nest (EBN) supplementation. It was predicted that Wi-Fi exposure reduces spermatogonia proliferation while EBN supplementation protects against it. A total of 30 (N = 30) 3-week-old Sprague Dawley weanlings were divided equally into five groups; Control, Control EBN, Wi-Fi, Sham Wi-Fi, and Wi-Fi + EBN. 2.45 GHz Wi-Fi exposure and 250 mg/kg EBN supplementation were conducted for 14 weeks. Findings showed that the Wi-Fi group had decreased in spermatogonia mitosis status. However, the mRNA and protein expression of c-Kit-SCF showed no significant decrease. Instead, the reproductive hormone showed a reduction in FSH and LH serum levels. Of these, LH serum level was decreased significantly in the Wi-Fi group. Otherwise, supplementing the Wi-Fi + EBN group with 250 mg/kg EBN resulted in a significant increase in spermatogonia mitotic status. Even though EBN supplementation improved c-Kit-SCF mRNA and protein expression, the effects were insignificant. The improvement of spermatogonia mitosis appeared to be associated with a significant increase in blood FSH levels following EBN supplementation. In conclusion, the long-term Wi-Fi exposure from pre-pubertal to adult age reduces spermatogonia proliferation in the testis. On the other hand, EBN supplementation protects spermatogonia proliferation against Wi-Fi exposure.
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Affiliation(s)
| | - Khairul Osman
- Faculty of Health Sciences, Universiti Kebangsaan Malaysia (UKM), Kuala Lumpur, Malaysia
| | - Chua Kien Hui
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia (UKM), Kuala Lumpur, Malaysia
| | - Aini Farzana Zulkefli
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia (UKM), Kuala Lumpur, Malaysia
| | - Siti Fatimah Ibrahim
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia (UKM), Kuala Lumpur, Malaysia
- *Correspondence: Siti Fatimah Ibrahim,
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Detection of Breast Cancer Using Histopathological Image Classification Dataset with Deep Learning Techniques. BIOMED RESEARCH INTERNATIONAL 2022; 2022:8363850. [PMID: 35281604 PMCID: PMC8913119 DOI: 10.1155/2022/8363850] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 01/02/2022] [Accepted: 02/07/2022] [Indexed: 02/06/2023]
Abstract
Cancer is one of the top causes of mortality, and it arises when cells in the body grow abnormally, like in the case of breast cancer. For people all around the world, it has now become a huge issue and a threat to their safety and wellbeing. Breast cancer is one of the major causes of death among females all over the globe, and it is particularly prevalent in the United States. It is possible to diagnose breast cancer using a variety of imaging modalities including mammography, computerized tomography (CT), magnetic resonance imaging (MRI), ultrasound, and biopsies, among others. To analyze the picture, a histopathology study (biopsy) is often performed, which assists in the diagnosis of breast cancer. The goal of this study is to develop improved strategies for various CAD phases that will play a critical role in minimizing the variability gap between and among observers. It created an automatic segmentation approach that is then followed by self-driven post-processing activities to successfully identify the Fourier Transform based Segmentation in the CAD system to improve its performance. When compared to existing techniques, the proposed segmentation technique has several advantages: spatial information is incorporated, there is no need to set any initial parameters beforehand, it is independent of magnification, it automatically determines the inputs for morphological operations to enhance segmented images so that pathologists can analyze the image with greater clarity, and it is fast. Extensive tests were conducted to determine the most effective feature extraction techniques and to investigate how textural, morphological, and graph characteristics impact the accuracy of categorization classification. In addition, a classification strategy for breast cancer detection has been developed that is based on weighted feature selection and uses an upgraded version of the Genetic Algorithm in conjunction with a Convolutional Neural Network Classifier. The practical application of the suggested improved segmentation and classification algorithms for the CAD framework may reduce the number of incorrect diagnoses and increase the accuracy of classification. So, it may serve as a second opinion tool for pathologists and aid in the early detection of diseases.
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Foster BM, Langsten KL, Mansour A, Shi L, Kerr BA. Tissue distribution of stem cell factor in adults. Exp Mol Pathol 2021; 122:104678. [PMID: 34450114 PMCID: PMC8516741 DOI: 10.1016/j.yexmp.2021.104678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 07/22/2021] [Accepted: 08/22/2021] [Indexed: 11/22/2022]
Abstract
Stem cell factor (SCF) is an essential cytokine during development and is necessary for gametogenesis, hematopoiesis, mast cell development, stem cell function, and melanogenesis. Here, we measure SCF concentration and distribution in adult humans and mice using gene expression analysis, tissue staining, and organ protein lysates. We demonstrate continued SCF expression in many cell types and tissues into adulthood. Tissues with high expression in adult humans included stomach, spleen, kidney, lung, and pancreas. In mice, we found high SCF expression in the esophagus, ovary, uterus, kidney, and small intestine. Future studies may correlate our findings of increased, organ-specific SCF concentrations within adult tissues with increased risk of SCF/CD117-related disease.
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Affiliation(s)
- Brittni M Foster
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC 27157, United States of America
| | - Kendall L Langsten
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC 27157, United States of America
| | - Ammar Mansour
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC 27157, United States of America
| | - Lihong Shi
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC 27157, United States of America
| | - Bethany A Kerr
- Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC 27157, United States of America; Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC 27157, United States of America.
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Abstract
In the last decades, the universal use of mobile phones has contributed to radiofrequency electromagnetic radiation environmental pollution. The steady growth in mobile phone usage has raised concerns about the effects of phone radiation on male reproductive health. Epidemiological studies report a sharp decline in sperm counts in developing countries, and worldwide with c. 14% of couples having difficulties to conceive, many of which are attributed to a male infertility factor. Environment and lifestyle factors are known to contribute to male infertility. Exposure to heat, radiation, or radioactivity might induce damage to biological tissue organs, including the testis. Given the ubiquitous use of mobile phones, the potential adverse effects of the resulting environmental radiation needs to be elucidated further. It seems to be an apparent relationship between the increased exposure to mobile phone radiofrequency and sperm quality decline, but the evidence is not conclusive. Our review summarizes the evidence concerning the possible adverse effects of cell phone radiation on the male reproductive system, with a focus on sperm quality. Also, we critically analyze the effects of elevated testicular temperature and oxidative stress on male fertility and how these factors could interfere with the physiological activities of the testis.
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10
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Chau V, Madan RA, Aragon-Ching JB. Protein kinase inhibitors for the treatment of prostate cancer. Expert Opin Pharmacother 2021; 22:1889-1899. [PMID: 33989112 DOI: 10.1080/14656566.2021.1925250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Protein kinases have emerged as targetable pathways used in metastatic prostate cancer given their role in prostatic tumor growth, proliferation and metastases. Protein kinase inhibitors are small molecules that target varying pathways including the breakpoint cluster region (BCR)-Abelson tyrosine kinase (ABL), colony stimulating factor-1 receptor (CSF1R), vascular endothelial growth factor (VEGF)/VEGF receptor (VEGFR) and phosphoinositide 3-kinase (PI3K) pathways and have been studied in prostate cancer trials with variable results. In particular, cabozantinib when used in combination trials and ipatasertib, when used with abiraterone in patients who harbor phosphatase and tensin homologue (PTEN) loss, have been promising. AREAS COVERED This article reviews the key early and late phase clinical trials currently investigating the use of protein kinase inhibitors in prostate cancer. EXPERT OPINION While multiple kinase inhibitors show promising results in prostate cancer, none have yet garnered Food and Drug Administration (FDA) approval. Studies are ongoing with the best candidate drugs discussed herein. However, multiple drugs have failed primary endpoints in prostate cancer. Therefore, further understanding of the potential mechanisms of resistance, combination and trial design of combination therapy may help pave the way for targeting kinase inhibition in prostate cancer.
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Affiliation(s)
- Vincent Chau
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Ravi A Madan
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jeanny B Aragon-Ching
- Genitourinary Cancers, Inova Medical Group, Inova Schar Cancer Institute, Fairfax, VA, USA.,Department of Internal Medicine, University of Virginia University School of Medicine, Charlottesville, VA, USA
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Harris KS, Shi L, Foster BM, Mobley ME, Elliott PL, Song CJ, Watabe K, Langefeld CD, Kerr BA. CD117/c-kit defines a prostate CSC-like subpopulation driving progression and TKI resistance. Sci Rep 2021; 11:1465. [PMID: 33446896 PMCID: PMC7809150 DOI: 10.1038/s41598-021-81126-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 01/04/2021] [Indexed: 12/12/2022] Open
Abstract
Cancer stem-like cells (CSCs) are associated with cancer progression, metastasis, and recurrence, and may also represent a subset of circulating tumor cells (CTCs). In our prior study, CTCs in advanced prostate cancer patients were found to express CD117/c-kit in a liquid biopsy. Whether CD117 expression played an active or passive role in the aggressiveness and migration of these CTCs remained an open question. In this study, we show that CD117 expression in prostate cancer patients is associated with decreased overall and progression-free survival and that activation and phosphorylation of CD117 increases in prostate cancer patients with higher Gleason grades. To determine how CD117 expression and activation by its ligand stem cell factor (SCF, kit ligand, steel factor) alter prostate cancer aggressiveness, we used C4-2 and PC3-mm human prostate cancer cells, which contain a CD117+ subpopulation. We demonstrate that CD117+ cells display increased proliferation and migration. In prostaspheres, CD117 expression enhances sphere formation. In both 2D and 3D cultures, stemness marker gene expression is higher in CD117+ cells. Using xenograft limiting dilution assays and serial tumor initiation assays, we show that CD117+ cells represent a CSC population. Combined, these data indicate that CD117 expression potentially promotes tumor initiation and metastasis. Further, in cell lines, CD117 activation by SCF promotes faster proliferation and invasiveness, while blocking CD117 activation with tyrosine kinase inhibitors (TKIs) decreased progression in a context-dependent manner. We demonstrate that CD117 expression and activation drives prostate cancer aggressiveness through the CSC phenotype and TKI resistance.
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Affiliation(s)
- Koran S Harris
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA
| | - Lihong Shi
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA
| | - Brittni M Foster
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA
| | - Mary E Mobley
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA
| | - Phyllis L Elliott
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA
| | - Conner J Song
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA
| | - Kounosuke Watabe
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA.,Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC, 27157, USA
| | - Carl D Langefeld
- Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC, 27157, USA.,Department of Biostatistics and Data Science, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA
| | - Bethany A Kerr
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA. .,Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC, 27157, USA. .,Department of Urology, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA.
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12
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Kobayashi PE, Lainetti PF, Leis-Filho AF, Delella FK, Carvalho M, Cury SS, Carvalho RF, Fonseca-Alves CE, Laufer-Amorim R. Transcriptome of Two Canine Prostate Cancer Cells Treated With Toceranib Phosphate Reveals Distinct Antitumor Profiles Associated With the PDGFR Pathway. Front Vet Sci 2020; 7:561212. [PMID: 33324695 PMCID: PMC7726326 DOI: 10.3389/fvets.2020.561212] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/30/2020] [Indexed: 01/17/2023] Open
Abstract
Canine prostate cancer (PC) presents a poor antitumor response, usually late diagnosis and prognosis. Toceranib phosphate (TP) is a nonspecific inhibitor of receptor tyrosine kinases (RTKs), including vascular endothelial growth factor receptor (VEGFR), platelet-derived growth factor receptor (PDGFR), and c-KIT. This study aimed to evaluate VEGFR2, PDGFR-β, and c-KIT protein expression in two established canine PC cell lines (PC1 and PC2) and the transcriptome profile of the cells after treatment with TP. Immunofluorescence (IF) analysis revealed VEGFR2 and PDGFR-β protein expression and the absence of c-KIT protein expression in both cell lines. After TP treatment, only the viability of PC1 cells decreased in a dose-dependent manner. Transcriptome and enrichment analyses of treated PC1 cells revealed 181 upregulated genes, which were related to decreased angiogenesis and cell proliferation. In addition, we found upregulated PDGFR-A, PDGFR-β, and PDGF-D expression in PC1 cells, and the upregulation of PDGFR-β was also observed in treated PC1 cells by qPCR. PC2 cells had fewer protein-protein interactions (PPIs), with 18 upregulated and 22 downregulated genes; the upregulated genes were involved in the regulation of parallel pathways and mechanisms related to proliferation, which could be associated with the resistance observed after treatment. The canine PC1 cell line but not the PC2 cell line showed decreased viability after treatment with TP, although both cell lines expressed PDGFR and VEGFR receptors. Further studies could explain the mechanism of resistance in PC2 cells and provide a basis for personalized treatment for dogs with PC.
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Affiliation(s)
- Priscila E Kobayashi
- Department of Veterinary Clinic, School of Veterinary Medicine and Animal Science, São Paulo State University-UNESP, Botucatu, Brazil
| | - Patrícia F Lainetti
- Department of Veterinary Surgery and Anesthesiology, School of Veterinary Medicine and Animal Science, São Paulo State University-UNESP, Botucatu, Brazil
| | - Antonio F Leis-Filho
- Department of Veterinary Clinic, School of Veterinary Medicine and Animal Science, São Paulo State University-UNESP, Botucatu, Brazil
| | - Flávia K Delella
- Department of Morphology, Institute of Biosciences, São Paulo State University-UNESP, Botucatu, Brazil
| | - Marcio Carvalho
- Department of Veterinary Clinic, School of Veterinary Medicine and Animal Science, São Paulo State University-UNESP, Botucatu, Brazil
| | - Sarah Santiloni Cury
- Department of Morphology, Institute of Biosciences, São Paulo State University-UNESP, Botucatu, Brazil
| | - Robson Francisco Carvalho
- Department of Morphology, Institute of Biosciences, São Paulo State University-UNESP, Botucatu, Brazil
| | - Carlos E Fonseca-Alves
- Department of Veterinary Surgery and Anesthesiology, School of Veterinary Medicine and Animal Science, São Paulo State University-UNESP, Botucatu, Brazil.,Institute of Health Sciences, Paulista University-UNIP, Bauru, Brazil
| | - Renée Laufer-Amorim
- Department of Veterinary Clinic, School of Veterinary Medicine and Animal Science, São Paulo State University-UNESP, Botucatu, Brazil
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Davis PJ, Mousa SA, Lin HY. Nongenomic Actions of Thyroid Hormone: The Integrin Component. Physiol Rev 2020; 101:319-352. [PMID: 32584192 DOI: 10.1152/physrev.00038.2019] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The extracellular domain of plasma membrane integrin αvβ3 contains a cell surface receptor for thyroid hormone analogues. The receptor is largely expressed and activated in tumor cells and rapidly dividing endothelial cells. The principal ligand for this receptor is l-thyroxine (T4), usually regarded only as a prohormone for 3,5,3'-triiodo-l-thyronine (T3), the hormone analogue that expresses thyroid hormone in the cell nucleus via nuclear receptors that are unrelated structurally to integrin αvβ3. At the integrin receptor for thyroid hormone, T4 regulates cancer and endothelial cell division, tumor cell defense pathways (such as anti-apoptosis), and angiogenesis and supports metastasis, radioresistance, and chemoresistance. The molecular mechanisms involve signal transduction via mitogen-activated protein kinase and phosphatidylinositol 3-kinase, differential expression of multiple genes related to the listed cell processes, and regulation of activities of other cell surface proteins, such as vascular growth factor receptors. Tetraiodothyroacetic acid (tetrac) is derived from T4 and competes with binding of T4 to the integrin. In the absence of T4, tetrac and chemically modified tetrac also have anticancer effects that culminate in altered gene transcription. Tumor xenografts are arrested by unmodified and chemically modified tetrac. The receptor requires further characterization in terms of contributions to nonmalignant cells, such as platelets and phagocytes. The integrin αvβ3 receptor for thyroid hormone offers a large panel of cellular actions that are relevant to cancer biology and that may be regulated by tetrac derivatives.
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Affiliation(s)
- Paul J Davis
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York; Department of Medicine, Albany Medical College, Albany, New York; Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan; Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan; and Traditional Herbal Medicine Research Center of Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Shaker A Mousa
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York; Department of Medicine, Albany Medical College, Albany, New York; Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan; Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan; and Traditional Herbal Medicine Research Center of Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Hung-Yun Lin
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York; Department of Medicine, Albany Medical College, Albany, New York; Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan; Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan; and Traditional Herbal Medicine Research Center of Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
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Jaffar FHF, Osman K, Ismail NH, Chin KY, Ibrahim SF. Adverse Effects of Wi-Fi Radiation on Male Reproductive System: A Systematic Review. TOHOKU J EXP MED 2019; 248:169-179. [DOI: 10.1620/tjem.248.169] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
| | - Khairul Osman
- Faculty of Health Sciences, Universiti Kebangsaan Malaysia (UKM), UKM Bangi
| | - Nur Hilwani Ismail
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia (UKM)
- School of Biology, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM)
| | - Kok-Yong Chin
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia (UKM)
| | - Siti Fatimah Ibrahim
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia (UKM)
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15
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Clinical correlation of molecular (VEGF, FGF, PDGF, c-Myc, c-Kit, Ras, p53) expression in juvenile nasopharyngeal angiofibroma. Eur Arch Otorhinolaryngol 2018; 275:2719-2726. [DOI: 10.1007/s00405-018-5110-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 08/27/2018] [Indexed: 12/19/2022]
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16
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Lim MCJ, Baird AM, Aird J, Greene J, Kapoor D, Gray SG, McDermott R, Finn SP. RNAs as Candidate Diagnostic and Prognostic Markers of Prostate Cancer-From Cell Line Models to Liquid Biopsies. Diagnostics (Basel) 2018; 8:E60. [PMID: 30200254 PMCID: PMC6163368 DOI: 10.3390/diagnostics8030060] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 12/19/2022] Open
Abstract
The treatment landscape of prostate cancer has evolved rapidly over the past five years. The explosion in treatment advances has been witnessed in parallel with significant progress in the field of molecular biomarkers. The advent of next-generation sequencing has enabled the molecular profiling of the genomic and transcriptomic architecture of prostate and other cancers. Coupled with this, is a renewed interest in the role of non-coding RNA (ncRNA) in prostate cancer biology. ncRNA consists of several different classes including small non-coding RNA (sncRNA), long non-coding RNA (lncRNA), and circular RNA (circRNA). These families are under active investigation, given their essential roles in cancer initiation, development and progression. This review focuses on the evidence for the role of RNAs in prostate cancer, and their use as diagnostic and prognostic markers, and targets for treatment in this disease.
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Affiliation(s)
- Marvin C J Lim
- Department of Histopathology and Morbid Anatomy, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin D08 W9RT, Ireland.
- Department of Medical Oncology, Tallaght University Hospital, Dublin D24 NR0A, Ireland.
| | - Anne-Marie Baird
- Cancer and Ageing Research Programme, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- Department of Clinical Medicine, Trinity College Dublin, College Green, Dublin D02 PN40, Ireland.
- Thoracic Oncology Research Group, Labmed Directorate, St. James's Hospital, Dublin 08 W9RT, Ireland.
| | - John Aird
- Department of Histopathology and Morbid Anatomy, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin D08 W9RT, Ireland.
| | - John Greene
- Department of Histopathology and Morbid Anatomy, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin D08 W9RT, Ireland.
| | - Dhruv Kapoor
- Department of Histopathology and Morbid Anatomy, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin D08 W9RT, Ireland.
| | - Steven G Gray
- Department of Clinical Medicine, Trinity College Dublin, College Green, Dublin D02 PN40, Ireland.
- Thoracic Oncology Research Group, Labmed Directorate, St. James's Hospital, Dublin 08 W9RT, Ireland.
- School of Biological Sciences, Dublin Institute of Technology, Dublin D08 NF82, Ireland.
| | - Ray McDermott
- Department of Medical Oncology, Tallaght University Hospital, Dublin D24 NR0A, Ireland.
- Department of Medical Oncology, St. Vincent's University Hospital, Dublin D04 YN26, Ireland.
| | - Stephen P Finn
- Department of Histopathology and Morbid Anatomy, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin D08 W9RT, Ireland.
- Department of Histopathology, St. James's Hospital, P.O. Box 580, James's Street, Dublin D08 X4RX, Ireland.
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Mousa SA, Glinsky GV, Lin HY, Ashur-Fabian O, Hercbergs A, Keating KA, Davis PJ. Contributions of Thyroid Hormone to Cancer Metastasis. Biomedicines 2018; 6:biomedicines6030089. [PMID: 30135398 PMCID: PMC6165185 DOI: 10.3390/biomedicines6030089] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/14/2018] [Accepted: 08/18/2018] [Indexed: 12/17/2022] Open
Abstract
Acting at a cell surface receptor on the extracellular domain of integrin αvβ3, thyroid hormone analogues regulate downstream the expression of a large panel of genes relevant to cancer cell proliferation, to cancer cell survival pathways, and to tumor-linked angiogenesis. Because αvβ3 is involved in the cancer cell metastatic process, we examine here the possibility that thyroid hormone as l-thyroxine (T4) and the thyroid hormone antagonist, tetraiodothyroacetic acid (tetrac), may respectively promote and inhibit metastasis. Actions of T4 and tetrac that are relevant to cancer metastasis include the multitude of synergistic effects on molecular levels such as expression of matrix metalloproteinase genes, angiogenesis support genes, receptor tyrosine kinase (EGFR/ERBB2) genes, specific microRNAs, the epithelial–mesenchymal transition (EMT) process; and on the cellular level are exemplified by effects on macrophages. We conclude that the thyroid hormone-αvβ3 interaction is mechanistically linked to cancer metastasis and that modified tetrac molecules have antimetastatic activity with feasible therapeutic potential.
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Affiliation(s)
- Shaker A Mousa
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY 12144, USA.
| | - Gennadi V Glinsky
- Institute of Engineering in Medicine, University of California, San Diego, CA 92093, USA.
| | - Hung-Yun Lin
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY 12144, USA.
- PhD Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan.
- Taipei Cancer Center, Taipei Medical University, Taipei 11031 Taiwan.
- Traditional Herbal Medicine Research Center of Taipei Medical University Hospital, Taipei 11031, Taiwan.
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei 11031, Taiwan.
| | - Osnat Ashur-Fabian
- Department of Human Molecular Genetics and Biochemistry, Tel Aviv University, Tel Aviv 69978, Israel.
| | - Aleck Hercbergs
- Department of Radiation Oncology, Cleveland Clinic, Cleveland, OH 44195, USA.
| | - Kelly A Keating
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY 12144, USA.
| | - Paul J Davis
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY 12144, USA.
- Department of Medicine, Albany Medical College, Albany, NY 12208, USA.
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Taximaimaiti R, Abudujilile D, Maihemuti M, Abuliken X, Abudulimu H. Expression of AMHR2 and C-KIT in cervical lesions in Uyghur Women of Xinjiang, China. Medicine (Baltimore) 2018; 97:e10793. [PMID: 29851788 PMCID: PMC6393133 DOI: 10.1097/md.0000000000010793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Cervical cancer is one of the most common malignant tumors in women. Anti-Müllerian hormone receptor 2 (AMHR2) and C-Kit were two members of protein kinase which were reported increased in some cancers like ovarian carcinoma and breast cancer. The present study aimed to assess the expression of AMHR2 and c-Kit in cervical cancer of different differentiated degrees as well as in cervicitis sections. METHODS All the lesions were collected randomly during clinical observations in hospitals located in Xinjiang, China. Polymerase chain reaction (PCR) and immunohistochemical staining were used to detect AMHR2 and c-Kit expression in cervical samples from women who had been infected with human papilloma virus (HPV)16. The expression rate was compared between cervical cancer of well, moderately and poorly differentiated and cervicitis. RESULTS The average age of the patients was 45 years; ranged from 23 to 80. For AMHR2, all 17 cervicitis samples ranged from (++) to (++++), while cervical cancer showed 11 (+), 9 (++), 15 (+++),9 (++++), and 8 (-), which showed AMHR2 expression was lessen with the poorer of differentiation degree of cervical cancer (P < .05). For c-Kit, 18 cervicitis samples mainly expressed as (-) with none showed (+++) or (++++), while cervical cancer samples showed 7 (-), 6 (+), 1 (++), 2 (+++), and 8 (++++), which indicated c-Kit's expression increased with the reduction of cervical cancer's differentiation degree (P < .05). CONCLUSION AMHR2 might have some correlation with self defense of our body, while c-Kit might link with the potential invasive capacity of cervical cancer.
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Affiliation(s)
- Reyisha Taximaimaiti
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
| | - Dilinuer Abudujilile
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
| | - Muzhapaer Maihemuti
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
| | - Xiekelai Abuliken
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
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Foster BM, Zaidi D, Young TR, Mobley ME, Kerr BA. CD117/c-kit in Cancer Stem Cell-Mediated Progression and Therapeutic Resistance. Biomedicines 2018. [PMID: 29518044 PMCID: PMC5874688 DOI: 10.3390/biomedicines6010031] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Metastasis is the primary cause of cancer patient morbidity and mortality, but due to persisting gaps in our knowledge, it remains untreatable. Metastases often occur as patient tumors progress or recur after initial therapy. Tumor recurrence at the primary site may be driven by a cancer stem-like cell or tumor progenitor cell, while recurrence at a secondary site is driven by metastatic cancer stem cells or metastasis-initiating cells. Ongoing efforts are aimed at identifying and characterizing these stem-like cells driving recurrence and metastasis. One potential marker for the cancer stem-like cell subpopulation is CD117/c-kit, a tyrosine kinase receptor associated with cancer progression and normal stem cell maintenance. Further, activation of CD117 by its ligand stem cell factor (SCF; kit ligand) in the progenitor cell niche stimulates several signaling pathways driving proliferation, survival, and migration. This review examines evidence that the SCF/CD117 signaling axis may contribute to the control of cancer progression through the regulation of stemness and resistance to tyrosine kinase inhibitors.
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Affiliation(s)
- Brittni M Foster
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
| | - Danish Zaidi
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
| | - Tyler R Young
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
| | - Mary E Mobley
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
| | - Bethany A Kerr
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
- Wake Forest Baptist Comprehensive Cancer Center, Winston-Salem, NC 27157, USA.
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20
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Abstract
Receptor tyrosine kinases (RTKs) play an important role in a variety of cellular processes including growth, motility, differentiation, and metabolism. As such, dysregulation of RTK signaling leads to an assortment of human diseases, most notably, cancers. Recent large-scale genomic studies have revealed the presence of various alterations in the genes encoding RTKs such as EGFR, HER2/ErbB2, and MET, amongst many others. Abnormal RTK activation in human cancers is mediated by four principal mechanisms: gain-of-function mutations, genomic amplification, chromosomal rearrangements, and / or autocrine activation. In this manuscript, we review the processes whereby RTKs are activated under normal physiological conditions and discuss several mechanisms whereby RTKs can be aberrantly activated in human cancers. Understanding of these mechanisms has important implications for selection of anti-cancer therapies.
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Affiliation(s)
- Zhenfang Du
- Department of Medicine, Division of Hematology and Oncology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Christine M Lovly
- Department of Medicine, Division of Hematology and Oncology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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21
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Park SH, Keller ET, Shiozawa Y. Bone Marrow Microenvironment as a Regulator and Therapeutic Target for Prostate Cancer Bone Metastasis. Calcif Tissue Int 2018; 102:152-162. [PMID: 29094177 PMCID: PMC5807175 DOI: 10.1007/s00223-017-0350-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 10/19/2017] [Indexed: 12/13/2022]
Abstract
Bone is the most common site of prostate cancer metastasis. Once prostate cancer cells metastasize to bone, the mortality rate of prostate cancer patients increases significantly. Furthermore, bone metastases produce multiple skeletal complications, including bone pain that impairs the patients' quality of life. Effective therapies for bone metastatic disease are underdeveloped with most current therapies being primarily palliative with modest survival benefit. Although the exact mechanisms through which prostate cancer metastasizes to bone are unclear, growing evidence suggests that the bone marrow microenvironment, particularly its hematopoietic activity, is a significant mediator of prostate cancer bone tropism. Moreover, the bone microenvironment may regulate metastatic prostate cancer cells between dormant and proliferative states. In this review, we discuss (1) how prostate cancer cells interact with the bone microenvironment to establish bone metastases and (2) current and future potential treatments for prostate cancer patients with bone metastases.
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Affiliation(s)
- Sun H Park
- Department of Cancer Biology and Comprehensive Cancer Center, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA
| | - Evan T Keller
- Departments of Urology and Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
| | - Yusuke Shiozawa
- Department of Cancer Biology and Comprehensive Cancer Center, Wake Forest School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA.
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22
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Fonseca-Alves CE, Kobayashi PE, Palmieri C, Laufer-Amorim R. Investigation of c-KIT and Ki67 expression in normal, preneoplastic and neoplastic canine prostate. BMC Vet Res 2017; 13:380. [PMID: 29207991 PMCID: PMC5718037 DOI: 10.1186/s12917-017-1304-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 11/27/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND c-KIT expression has been related to bone metastasis in human prostate cancer, but whether c-KIT expression can be similarly classified in canine prostatic tissue is unknown. This study assessed c-KIT and Ki67 expression in canine prostate cancer (PC). c-KIT gene and protein expression and Ki67 expression were evaluated in forty-four canine prostatic tissues by immunohistochemistry, RT-qPCR and western blot. Additionally, we have investigated c-KIT protein expression by immunoblotting in two primary canine prostate cancer cell lines. RESULTS Eleven normal prostates, 12 proliferative inflammatory atrophy (PIA) prostates, 18 PC, 3 metastatic lesions and two prostate cancer cell cultures (PC1 and PC2) were analysed. The prostatic tissue exhibited varying degrees of membranous, cytoplasmic or membranous/cytoplasmic c-KIT staining. Four normal prostates, 4 PIA and 5 prostatic carcinomas showed positive c-KIT expression. No c-KIT immunoexpression was observed in metastases. Canine prostate cancer and PIA samples contained a higher number of Ki67-positive cells compared to normal samples. The median relative quantification (RQ) for c-KIT expression in normal, PIA and prostate cancer and metastatic samples were 0.6 (0.1-2.5), 0.7 (0.09-2.1), 0.7 (0.09-5.1) and 0.1 (0.07-0.6), respectively. A positive correlation between the number of Ki67-positive cells and c-KIT transcript levels was observed in prostate cancer samples. In the cell line, PC1 was negative for c-KIT protein expression, while PC2 was weakly positive. CONCLUSION The present study identified a strong correlation between c-KIT expression and proliferative index, suggesting that c-KIT may influence cell proliferation. Therefore, c-KIT heterogeneous protein expression among the samples (five positive and thirteen negative prostate cancer samples) indicates a personalized approach for canine prostate cancer.
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Affiliation(s)
- Carlos Eduardo Fonseca-Alves
- Department of Veterinary Clinic, School of Veterinary Medicine and Animal Science, Univ. Estadual Paulista - UNESP, Rua Professor Dr Walter Maurício Correa, s/n, Unesp/Campus de Botucatu, Mail box- 560, Botucatu, SP, 18618-681, Brazil
| | - Priscilla Emiko Kobayashi
- Department of Veterinary Clinic, School of Veterinary Medicine and Animal Science, Univ. Estadual Paulista - UNESP, Rua Professor Dr Walter Maurício Correa, s/n, Unesp/Campus de Botucatu, Mail box- 560, Botucatu, SP, 18618-681, Brazil
| | - Chiara Palmieri
- School of Veterinary Science, The University of Queensland, Gatton Campus, Gatton, Queensland, Australia
| | - Renée Laufer-Amorim
- Department of Veterinary Clinic, School of Veterinary Medicine and Animal Science, Univ. Estadual Paulista - UNESP, Rua Professor Dr Walter Maurício Correa, s/n, Unesp/Campus de Botucatu, Mail box- 560, Botucatu, SP, 18618-681, Brazil.
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Figueira MI, Cardoso HJ, Correia S, Maia CJ, Socorro S. The stem cell factor (SCF)/c-KIT system in carcinogenesis of reproductive tissues: What does the hormonal regulation tell us? Cancer Lett 2017; 405:10-21. [DOI: 10.1016/j.canlet.2017.07.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 07/15/2017] [Accepted: 07/17/2017] [Indexed: 12/13/2022]
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He Y, Zeng H, Yu Y, Zhang J, Zeng X, Gong F, Liu Q, Yang B. Resveratrol Improves Cell Cycle Arrest in Chronic Prostatitis Rats, by C-kit/SCF Suppression. DNA Cell Biol 2017; 36:709-714. [PMID: 28604067 DOI: 10.1089/dna.2017.3741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Chronic prostatitis (CP) with complex pathogenesis is difficult for treatment. c-kit has been associated with the control of cell proliferation of prostate cells. This study aims to evaluate the role of resveratrol, an activator of Sirt1, in regulating the expression of c-kit in CP and investigate the consequent effects on cell cycle. Rat model of CP was established through subcutaneous injections of diphtheria-pertussis-tetanus vaccine and subsequently treated with resveratrol. Hematoxylin and eosin staining was performed to identify the histopathological changes in prostates. Western blotting and immunohistochemical staining examined the expression level of c-kit, stem cell factor (SCF), Sirt1, and cell cycle-associated proteins. The model group exhibited severe diffuse chronic inflammation, characterized by leukocyte infiltration and papillary frond protrusion into the gland cavities, and a notable increase in prostatic epithelial height. Gland lumen diameter was also significantly smaller; the activity of c-kit/SCF in the CP rats was increased significantly compared to the control group. Meanwhile, the cell cycle proteins are dysregulated significantly in CP rats. Resveratrol treatment significantly improved these factors by Sirt1 activation. Dysregulation of cell cycle was involved in the pathological processes of CP, which was improved after resveratrol treatment by the downregulation of c-kit/SCF by activating Sirt1.
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Affiliation(s)
- Yi He
- 1 Department of Urology, The Second Affiliated Hospital of Dalian Medical University , Dalian, China
| | - Huizhi Zeng
- 2 Department of General Surgery, The Second Affiliated Hospital of Dalian Medical University , Dalian, China
| | - Yang Yu
- 1 Department of Urology, The Second Affiliated Hospital of Dalian Medical University , Dalian, China
| | - Jiashu Zhang
- 3 College of Pharmacy, Dalian Medical University , Dalian, China
| | - Xiaona Zeng
- 3 College of Pharmacy, Dalian Medical University , Dalian, China
| | - Fengtao Gong
- 3 College of Pharmacy, Dalian Medical University , Dalian, China
| | - Qi Liu
- 3 College of Pharmacy, Dalian Medical University , Dalian, China
| | - Bo Yang
- 1 Department of Urology, The Second Affiliated Hospital of Dalian Medical University , Dalian, China
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Prostate Cancer Stem Cell Markers Drive Progression, Therapeutic Resistance, and Bone Metastasis. Stem Cells Int 2017; 2017:8629234. [PMID: 28690641 PMCID: PMC5485361 DOI: 10.1155/2017/8629234] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 03/29/2017] [Accepted: 05/03/2017] [Indexed: 02/07/2023] Open
Abstract
Metastatic or recurrent tumors are the primary cause of cancer-related death. For prostate cancer, patients diagnosed with local disease have a 99% 5-year survival rate; however, this 5-year survival rate drops to 28% in patients with metastatic disease. This dramatic decline in survival has driven interest in discovering new markers able to identify tumors likely to recur and in developing new methods to prevent metastases from occurring. Biomarker discovery for aggressive tumor cells includes attempts to identify cancer stem cells (CSCs). CSCs are defined as tumor cells capable of self-renewal and regenerating the entire tumor heterogeneity. Thus, it is hypothesized that CSCs may drive primary tumor aggressiveness, metastatic colonization, and therapeutic relapse. The ability to identify these cells in the primary tumor or circulation would provide prognostic information capable of driving prostate cancer treatment decisions. Further, the ability to target these CSCs could prevent tumor metastasis and relapse after therapy allowing for prostate cancer to finally be cured. Here, we will review potential CSC markers and highlight evidence that describes how cells expressing each marker may drive prostate cancer progression, metastatic colonization and growth, tumor recurrence, and resistance to treatment.
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26
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Foroozan M, Roudi R, Abolhasani M, Gheytanchi E, Mehrazma M. Clinical significance of endothelial cell marker CD34 and mast cell marker CD117 in prostate adenocarcinoma. Pathol Res Pract 2017; 213:612-618. [PMID: 28552539 DOI: 10.1016/j.prp.2017.04.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/27/2017] [Accepted: 04/26/2017] [Indexed: 02/07/2023]
Abstract
Prostate cancer is the second cause of cancer-related deaths in men and this is attributed to its aggressiveness and metastatic identity. Our objective was to evaluate the expression patterns of endothelial cell marker CD34 and mast cell marker CD117 in prostate adenocarcinoma (PCa) compared to benign prostate tissue and their relation to the clinicopathological features. A total of 90 prostate samples, including 45 PCa and 45 benign prostate tissues were immunohistochemically examined for the detection of CD34 and CD117 markers. The expression of these markers was also correlated with clinicopathological parameters. Significant overexpression of CD34 was found in PCa group compared to benign prostate tissues (P≤0.001). The expression of CD34 and CD117 in PCa with advanced Gleason score was more than PCa with early Gleason score (P=0.02 and P=0.005, respectively). A significant positive correlation was observed between CD34 expression and the level of total serum prostate specific antigen (sPSA) (P=0.006). In addition, CD34High/CD117High phenotype was frequently observed in PCa cases compared to benign prostate tissues (P≤0.001). There was a positive significant association between CD34High/CD117High phenotype with advanced Gleason score (P≤0.001) and total sPSA level (P=0.02). Our findings showed that increased expression of CD34 and CD117 markers confer tumor progression and aggressiveness on PCa. These molecules may be good candidates for targeted therapy of PCa patients.
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Affiliation(s)
- Mozhdeh Foroozan
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Pathology, Iran University of Medical Sciences, Tehran, Iran
| | - Raheleh Roudi
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Abolhasani
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Pathology, Iran University of Medical Sciences, Tehran, Iran
| | - Elmira Gheytanchi
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.
| | - Mitra Mehrazma
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Pathology, Iran University of Medical Sciences, Tehran, Iran.
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Wang X, Dong J, Jia L, Zhao T, Lang M, Li Z, Lan C, Li X, Hao J, Wang H, Qin T, Huang C, Yang S, Yu M, Ren H. HIF-2-dependent expression of stem cell factor promotes metastasis in hepatocellular carcinoma. Cancer Lett 2017; 393:113-124. [DOI: 10.1016/j.canlet.2017.01.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 01/21/2017] [Accepted: 01/23/2017] [Indexed: 12/12/2022]
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Vazquez-Mellado MJ, Monjaras-Embriz V, Rocha-Zavaleta L. Erythropoietin, Stem Cell Factor, and Cancer Cell Migration. VITAMINS AND HORMONES 2017. [DOI: 10.1016/bs.vh.2017.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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29
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Current Stem Cell Biomarkers and Their Functional Mechanisms in Prostate Cancer. Int J Mol Sci 2016; 17:ijms17071163. [PMID: 27447616 PMCID: PMC4964535 DOI: 10.3390/ijms17071163] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 07/07/2016] [Accepted: 07/09/2016] [Indexed: 12/12/2022] Open
Abstract
Currently there is little effective treatment available for castration resistant prostate cancer, which is responsible for the majority of prostate cancer related deaths. Emerging evidence suggested that cancer stem cells might play an important role in resistance to traditional cancer therapies, and the studies of cancer stem cells (including specific isolation and targeting on those cells) might benefit the discovery of novel treatment of prostate cancer, especially castration resistant disease. In this review, we summarized major biomarkers for prostate cancer stem cells, as well as their functional mechanisms and potential application in clinical diagnosis and treatment of patients.
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30
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Cho WJ, Oliveira DSM, Najy AJ, Mainetti LE, Aoun HD, Cher ML, Heath E, Kim HRC, Bonfil RD. Gene expression analysis of bone metastasis and circulating tumor cells from metastatic castrate-resistant prostate cancer patients. J Transl Med 2016; 14:72. [PMID: 26975354 PMCID: PMC4791970 DOI: 10.1186/s12967-016-0829-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 03/05/2016] [Indexed: 01/15/2023] Open
Abstract
Background Characterization of genes linked to bone metastasis is critical for identification of novel prognostic or predictive biomarkers and potential therapeutic targets in metastatic castrate-resistant prostate cancer (mCRPC). Although bone marrow core biopsies (BMBx) can be obtained for gene profiling, the procedure itself is invasive and uncommon practice in mCRPC patients. Conversely, circulating tumor cells (CTCs), which are likely to stem from bone metastases, can be isolated from blood. The goals of this exploratory study were to establish a sensitive methodology to analyze gene expression in BMBx and CTCs, and to determine whether the presence or absence of detectable gene expression is concordant in matching samples from mCRPC patients. Methods The CellSearch® platform was used to enrich and enumerate CTCs. Low numbers of PC3 prostate cancer (PCa) cells were spiked into normal blood to assess cell recovery rate. RNA extracted from recovered PC3 cells was amplified using an Eberwine-based procedure to obtain antisense mRNA (aRNA), and assess the linearity of the RNA amplification method. In this pilot study, RNAs extracted from CTCs and PCa cells microdissected from formalin-fixed paraffin-embedded BMBx, were amplified to obtain aRNA and assess the expression of eight genes functionally relevant to PCa bone metastasis using RT-PCR. Results RNAs were successfully extracted from as few as 1–5 PCa cells in blood samples. The relative expression levels of reference genes were maintained after RNA amplification. The integrity of the amplified RNA was also demonstrated by RT-PCR analysis using primer sets that target the 5′-end, middle, and 3′-end of reference mRNA. We found that in 21 out of 28 comparisons, the presence or absence of detectable gene expression in CTCs and PCa cells microdissected from single bone lesions of the same patients was concordant. Conclusions This exploratory analysis suggests that aRNA amplification through in vitro transcription may be useful as a method to detect gene expression in small numbers of CTCs and tumor cells microdissected from bone metastatic lesions. In some cases, gene expression in CTCs and BMBxs was not concordant, raising questions about using CTC gene expression to make clinical decisions. Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-0829-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Won Jin Cho
- Department of Urology, Wayne State University School of Medicine and Karmanos Cancer Institute, 540 E. Canfield, Scott Hall # 9105, Detroit, MI, 4820, USA
| | - Daniel S M Oliveira
- Department of Urology, Wayne State University School of Medicine and Karmanos Cancer Institute, 540 E. Canfield, Scott Hall # 9105, Detroit, MI, 4820, USA
| | - Abdo J Najy
- Department of Pathology, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, MI, USA
| | - Leandro E Mainetti
- Department of Urology, Wayne State University School of Medicine and Karmanos Cancer Institute, 540 E. Canfield, Scott Hall # 9105, Detroit, MI, 4820, USA
| | - Hussein D Aoun
- Department of Radiology, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, MI, USA
| | - Michael L Cher
- Department of Urology, Wayne State University School of Medicine and Karmanos Cancer Institute, 540 E. Canfield, Scott Hall # 9105, Detroit, MI, 4820, USA.,Department of Pathology, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, MI, USA
| | - Elisabeth Heath
- Department of Oncology, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, MI, USA
| | - Hyeong-Reh C Kim
- Department of Pathology, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, MI, USA
| | - R Daniel Bonfil
- Department of Urology, Wayne State University School of Medicine and Karmanos Cancer Institute, 540 E. Canfield, Scott Hall # 9105, Detroit, MI, 4820, USA. .,Department of Pathology, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, MI, USA. .,Department of Oncology, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, MI, USA.
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31
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Tang KD, Holzapfel BM, Liu J, Lee TKW, Ma S, Jovanovic L, An J, Russell PJ, Clements JA, Hutmacher DW, Ling MT. Tie-2 regulates the stemness and metastatic properties of prostate cancer cells. Oncotarget 2016; 7:2572-84. [PMID: 25978029 PMCID: PMC4823056 DOI: 10.18632/oncotarget.3950] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 04/08/2015] [Indexed: 11/27/2022] Open
Abstract
Ample evidence supports that prostate tumor metastasis originates from a rare population of cancer cells, known as cancer stem cells (CSCs). Unfortunately, little is known about the identity of these cells, making it difficult to target the metastatic prostate tumor. Here, for the first time, we report the identification of a rare population of prostate cancer cells that express the Tie-2 protein. We found that this Tie-2High population exists mainly in prostate cancer cell lines that are capable of metastasizing to the bone. These cells not only express a higher level of CSC markers but also demonstrate enhanced resistance to the chemotherapeutic drug Cabazitaxel. In addition, knockdown of the expression of the Tie-2 ligand angiopoietin (Ang-1) led to suppression of CSC markers, suggesting that the Ang-1/Tie-2 signaling pathway functions as an autocrine loop for the maintenance of prostate CSCs. More importantly, we found that Tie-2High prostate cancer cells are more adhesive than the Tie-2Low population to both osteoblasts and endothelial cells. Moreover, only the Tie-2High, but not the Tie-2Low cells developed tumor metastasis in vivo when injected at a low number. Taken together, our data suggest that Tie-2 may play an important role during the development of prostate tumor metastasis.
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MESH Headings
- Animals
- Apoptosis
- Cell Adhesion
- Cell Proliferation
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Humans
- Immunoenzyme Techniques
- Male
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Neoplastic Stem Cells/metabolism
- Neoplastic Stem Cells/pathology
- Osteoblasts/metabolism
- Osteoblasts/pathology
- Prostatic Neoplasms/genetics
- Prostatic Neoplasms/metabolism
- Prostatic Neoplasms/secondary
- RNA, Messenger/genetics
- RNA, Small Interfering/genetics
- Real-Time Polymerase Chain Reaction
- Receptor, TIE-2/antagonists & inhibitors
- Receptor, TIE-2/genetics
- Receptor, TIE-2/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Stromal Cells/metabolism
- Stromal Cells/pathology
- Tumor Cells, Cultured
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Kai-Dun Tang
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Boris M. Holzapfel
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Ji Liu
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Terence Kin-Wah Lee
- Department of Pathology, Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, China
| | - Stephanie Ma
- Department of Anatomy, Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, China
| | - Lidija Jovanovic
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Jiyuan An
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Pamela J. Russell
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Judith A. Clements
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Dietmar W. Hutmacher
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
| | - Ming-Tat Ling
- Australian Prostate Cancer Research Centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology and Translational Research Institute, Woolloongabba, Qld, Australia
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32
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Archibald M, Pritchard T, Nehoff H, Rosengren RJ, Greish K, Taurin S. A combination of sorafenib and nilotinib reduces the growth of castrate-resistant prostate cancer. Int J Nanomedicine 2016; 11:179-200. [PMID: 26811677 PMCID: PMC4712974 DOI: 10.2147/ijn.s97286] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Castrate-resistant prostate cancer (CRPC) remains incurable due to the lack of effective therapies. Several tyrosine kinases have been implicated in the development and growth of CRPC, as such targeting these kinases may offer an alternative therapeutic strategy. We established the combination of two tyrosine kinase inhibitors (TKIs), sorafenib and nilotinib, as the most cytotoxic. In addtion, to improve their bioavailability and reduce their metabolism, we encapsulated sorafenib and nilotinib into styrene-co-maleic acid micelles. The micelles' charge, size, and release rate were characterized. We assessed the effect of the combination on the cytotoxicity, cell cycle, apoptosis, protein expression, tumor spheroid integrity, migration, and invasion. The micelles exhibited a mean diameter of 100 nm, a neutral charge, and appeared highly stable. The micellar TKIs promoted greater cytotoxicity, decreased cell proliferation, and increased apoptosis relative to the free TKIs. In addition, the combination reduced the expression and activity of several tyrosine kinases and reduced tumor spheroid integrity and metastatic potential of CRPC cell lines more efficiently than the single treatments. The combination increased the therapeutic potential and demonstrated the relevance of a targeted combination therapy for the treatment of CRPC. In addition, the efficacy of the encapsulated drugs provides the basis for an in vivo preclinical testing.
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Affiliation(s)
- Monica Archibald
- Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand
| | - Tara Pritchard
- Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand
| | - Hayley Nehoff
- Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand
| | - Rhonda J Rosengren
- Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand
| | - Khaled Greish
- Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand
- Aljawhara Centre for Molecular Medicine, Arabian Gulf University, Manama, Kingdom of Bahrain
| | - Sebastien Taurin
- Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand
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33
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Wyszynski RW, Gibbs BF, Varani L, Iannotta D, Sumbayev VV. Interleukin-1 beta induces the expression and production of stem cell factor by epithelial cells: crucial involvement of the PI-3K/mTOR pathway and HIF-1 transcription complex. Cell Mol Immunol 2016; 13:47-56. [PMID: 25418470 PMCID: PMC4711673 DOI: 10.1038/cmi.2014.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/17/2014] [Accepted: 10/17/2014] [Indexed: 11/09/2022] Open
Abstract
Potential crosslinks between inflammation and leukaemia have been discussed for some time, but experimental evidence to support this dogma is scarce. In particular, it is important to understand the mechanisms responsible for potential upregulation of proto-oncogenic growth factor expressions by inflammatory mediators. Here, we investigated the ability of the highly inflammatory cytokine interleukin-1 beta (IL-1β) to induce the production of stem cell factor (SCF), which is a major hematopoietic growth factor that controls the progression of acute myeloid leukaemia upon malignant transformation of haematopoietic myeloid cells. We found that human IL-1β induced the expression/secretion of SCF in MCF-7 human epithelial breast cancer cells and that this process depended on the hypoxia-inducible factor 1 (HIF-1) transcription complex. We also demonstrated a crucial role of the phosphatidylinositol-3 kinase (PI-3K)/mammalian target of rapamycin (mTOR) pathway in IL-1β-induced HIF-1α accumulation in MCF-7 cells. Importantly, mTOR was also found to play a role in IL-1β-induced SCF production. Furthermore, a tendency for a positive correlation of IL-1β and SCF levels in the plasma of healthy human donors was observed. Altogether, our results demonstrate that IL-1β, which normally bridges innate and adaptive immunity, induces the production of the major haematopoietic/proleukaemic growth factor SCF through the PI-3K/mTOR pathway and the HIF-1 transcription complex. These findings strongly support a cross-talk between inflammation and acute myeloid leukaemia.
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Affiliation(s)
| | | | - Luca Varani
- Institute for Research in Biomedicine, Bellinzona, Switzerland
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34
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Silencing stem cell factor attenuates stemness and inhibits migration of cancer stem cells derived from Lewis lung carcinoma cells. Tumour Biol 2015; 37:7213-27. [PMID: 26666817 DOI: 10.1007/s13277-015-4577-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 12/02/2015] [Indexed: 02/05/2023] Open
Abstract
Stem cell factor (SCF) plays an important role in tumor growth and metastasis. However, the function of SCF in regulating stemness and migration of cancer stem cells (CSCs) remains largely undefined. Here, we report that non-adhesive culture system can enrich and expand CSCs derived from Lewis lung carcinoma (LLC) cells and that the expression level of SCF in CSCs was higher than those in LLC cells. Silencing SCF via short hairpin (sh) RNA lentivirus transduction attenuated sphere formation and inhibited expressions of stemness genes, ALDH1, Sox2, and Oct4 of CSCs in vitro and in vivo. Moreover, SCF-silenced CSCs inhibited the migration and epithelial-mesenchymal transition, with decreased expression of N-cadherin, Vimentin, and increased expression of E-cadherin in vitro and in vivo. Finally, SCF-short hairpin RNA (shRNA) lentivirus transduction suppressed tumorigenicity of CSCs. Taken together, our findings unraveled an important role of SCF in CSCs derived from LLC cells. SCF might serve as a novel target for lung cancer therapy.
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35
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Kerr BA, Miocinovic R, Smith AK, West XZ, Watts KE, Alzayed AW, Klink JC, Mir MC, Sturey T, Hansel DE, Heston WD, Stephenson AJ, Klein EA, Byzova TV. CD117⁺ cells in the circulation are predictive of advanced prostate cancer. Oncotarget 2015; 6:1889-97. [PMID: 25595903 PMCID: PMC4359340 DOI: 10.18632/oncotarget.2796] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 11/20/2014] [Indexed: 12/26/2022] Open
Abstract
Circulating tumor cells (CTCs) are associated with cancer progression, aggressiveness and metastasis. However, the frequency and predictive value of CTCs in patients remains unknown. If circulating cells are involved in tumor aggressiveness and metastasis, then cell levels should decline upon tumor removal in localized cancer patients, but remain high in metastatic patients. Accordingly, proposed biomarkers CD117/c-kit, CD133, CXCR4/CD184, and CD34-positive cell percentages in the blood of patients undergoing radical prostatectomy for localized cancer were assessed by flow cytometry prior to intervention and 1–3 months postoperatively. Only circulating CD117+ cell percentages decreased after radical prostatectomy, increased with cancer progression and correlated with high PSA values. Notably, postoperative CD117+ levels did not decrease in patients experiencing biochemical recurrence. In a xenograft model, CD117-enriched tumors were more vascularized and aggressive. Thus, CD117 expression on CTCs promotes tumor progression and could be a biomarker for prostate cancer diagnosis, prognosis, and/or response to therapy.
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Affiliation(s)
- Bethany A Kerr
- Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Ranko Miocinovic
- Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.,Glickman Urological and Kidney Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Armine K Smith
- Glickman Urological and Kidney Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Xiaoxia Z West
- Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Katherine E Watts
- Department of Anatomic Pathology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Amanda W Alzayed
- Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Joseph C Klink
- Glickman Urological and Kidney Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Maria C Mir
- Glickman Urological and Kidney Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Tiffany Sturey
- Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Donna E Hansel
- Glickman Urological and Kidney Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.,Department of Anatomic Pathology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.,Taussig Cancer Center, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Warren D Heston
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Andrew J Stephenson
- Glickman Urological and Kidney Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.,Taussig Cancer Center, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Eric A Klein
- Glickman Urological and Kidney Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Tatiana V Byzova
- Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.,Taussig Cancer Center, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
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36
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Figueira MI, Correia S, Vaz CV, Cardoso HJ, Gomes IM, Marques R, Maia CJ, Socorro S. Estrogens down-regulate the stem cell factor (SCF)/c-KIT system in prostate cells: Evidence of antiproliferative and proapoptotic effects. Biochem Pharmacol 2015; 99:73-87. [PMID: 26592659 DOI: 10.1016/j.bcp.2015.11.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 11/13/2015] [Indexed: 10/22/2022]
Abstract
The development of prostate cancer (PCa) is intimately associated with the hormonal environment, and the sex steroids estrogens have been implicated in prostate malignancy. However, if some studies identified estrogens as causative agents of PCa, others indicated that these steroids have a protective role counteracting prostate overgrowth. The tyrosine kinase receptor c-KIT and its ligand, the stem cell factor (SCF), have been associated with the control of cell proliferation/apoptosis and prostate carcinogenesis, and studies show that estrogens regulate their expression in different tissues, though, in the case of prostate this remains unknown. The present study aims to evaluate the role of 17β-estradiol (E2) in regulating the expression of SCF/c-KIT in human prostate cell lines and rat prostate, and to investigate the consequent effects on prostate cell proliferation and apoptosis. qPCR, Western Blot, and immuno(cito)histochemistry analysis showed that E2-treatment decreased the expression of SCF and c-KIT both in human prostate cells and rat prostate. Furthermore, the diminished expression of SCF/c-KIT was underpinned by the diminished prostate weight and reduced proliferation index. On the other hand, the results of TUNEL labelling, the increased activity of caspase-3, and the augmented expression of caspase-8 and Fas system in the prostate of E2-treated animals indicated augmented apoptosis in response to E2. The obtained results demonstrated that E2 down-regulated the expression of SCF/c-KIT system in prostate cells, which was associated with antiproliferative and proapoptotic effects. Moreover, these findings support the protective role of estrogens in PCa and open new perspectives on the application of estrogen-based therapies.
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Affiliation(s)
- Marília I Figueira
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Sara Correia
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Cátia V Vaz
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Henrique J Cardoso
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Inês M Gomes
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Ricardo Marques
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Cláudio J Maia
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Sílvia Socorro
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal.
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37
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Thompson ML, Jimenez-Andrade JM, Chartier S, Tsai J, Burton EA, Habets G, Lin PS, West BL, Mantyh PW. Targeting cells of the myeloid lineage attenuates pain and disease progression in a prostate model of bone cancer. Pain 2015; 156:1692-1702. [PMID: 25993548 PMCID: PMC4545688 DOI: 10.1097/j.pain.0000000000000228] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Tumor cells frequently metastasize to bone where they can generate cancer-induced bone pain (CIBP) that can be difficult to fully control using available therapies. Here, we explored whether PLX3397, a high-affinity small molecular antagonist that binds to and inhibits phosphorylation of colony-stimulating factor-1 receptor, the tyrosine-protein kinase c-Kit, and the FMS-like tyrosine kinase 3, can reduce CIBP. These 3 targets all regulate the proliferation and function of a subset of the myeloid cells including macrophages, osteoclasts, and mast cells. Preliminary experiments show that PLX3397 attenuated inflammatory pain after formalin injection into the hind paw of the rat. As there is an inflammatory component in CIBP, involving macrophages and osteoclasts, the effect of PLX3397 was explored in a prostate model of CIBP where skeletal pain, cancer cell proliferation, tumor metastasis, and bone remodeling could be monitored in the same animal. Administration of PLX3397 was initiated on day 14 after prostate cancer cell injection when the tumor was well established, and tumor-induced bone remodeling was first evident. Over the next 6 weeks, sustained administration of PLX3397 attenuated CIBP behaviors by approximately 50% and was equally efficacious in reducing tumor cell growth, formation of new tumor colonies in bone, and pathological tumor-induced bone remodeling. Developing a better understanding of potential effects that analgesic therapies have on the tumor itself may allow the development of therapies that not only better control the pain but also positively impact disease progression and overall survival in patients with bone cancer.
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Affiliation(s)
- Michelle L. Thompson
- Department of Pharmacology, Arizona Cancer Center, University of Arizona, 1501 N. Campbell Ave, Tucson, AZ 85724, USA
| | - Juan Miguel Jimenez-Andrade
- Department of Pharmacology, Arizona Cancer Center, University of Arizona, 1501 N. Campbell Ave, Tucson, AZ 85724, USA
| | - Stephane Chartier
- Department of Pharmacology, Arizona Cancer Center, University of Arizona, 1501 N. Campbell Ave, Tucson, AZ 85724, USA
| | - James Tsai
- Plexxikon, Inc., 91 Bolivar Drive, Berkeley, CA 94710, USA
| | | | - Gaston Habets
- Plexxikon, Inc., 91 Bolivar Drive, Berkeley, CA 94710, USA
| | - Paul S. Lin
- Plexxikon, Inc., 91 Bolivar Drive, Berkeley, CA 94710, USA
| | - Brian L. West
- Plexxikon, Inc., 91 Bolivar Drive, Berkeley, CA 94710, USA
| | - Patrick W. Mantyh
- Department of Pharmacology, Arizona Cancer Center, University of Arizona, 1501 N. Campbell Ave, Tucson, AZ 85724, USA
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38
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Peng Y, Chen Q, Gu M, Chen Y, Zhang M, Zhou J, Wang H, Gao Y, Li W, Wang Z, Cai Z. Human Stromal Cells in the Peripheral Zone of the Prostate Promote Tumorigenesis of Prostatic Cancer Stem Cells through Up-regulation of C-Kit Expression. J Cancer 2015; 6:776-85. [PMID: 26185540 PMCID: PMC4504114 DOI: 10.7150/jca.9961] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Accepted: 09/05/2014] [Indexed: 12/19/2022] Open
Abstract
Objective: Most prostate cancers originate from the prostatic peripheral zone (PZ). We tested the hypothesis that the stromal cells from PZ and transitional zone (TZ) have differential effects on the ability of tumorigenesis. Methods: Stromal cells isolated from the PZ and TZ of normal human prostates mixed with DU145 cells subcutaneously injected into athymic nude mice. The volume and weight of tumors was measured and analyzing the ability of purified DU145 cells isolated from the tumors to migrate and proliferate. The expression patterns of stem cell-specific genes of these DU145 cells were examined. The C-Kit inhibitor, imatinib mesylate, was administrated to confirm the effect of stromal cells on the tumorigenesis. Results: The volume and weight of tumors were significantly higher in mice transplanted with DU145 and stromal cells from PZ. In contrast, the data was significantly lower with DU145 and stromal cells from TZ than DU145 alone. The purified DU145 cells isolated from the tumors with DU145 and stromal cells in PZ had increased ability to migrate and proliferate, and had increased expression of C-Kit. These effects of the stromal cells in the PZ on DU145 cells could be blocked using imatinib mesylate. Conclusions: Human stromal cells in the PZ promote the in vivo tumorigenesis of DU145 through up-regulating C-Kit; in contrast, the stromal cells in the TZ inhibit it through down-regulating the expression of C-Kit. The model will be useful for understanding the mechanisms by which the prostatic stem cell niche controls the tumorigeneis of prostatic cancer stem cells.
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Affiliation(s)
- Yubing Peng
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Qi Chen
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Meng Gu
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Yanbo Chen
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Ming Zhang
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Juan Zhou
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Hao Wang
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Yan Gao
- 2. Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Wenji Li
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Zhong Wang
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Zhikang Cai
- 1. Department of Urology, Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
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Cardoso HJ, Vaz CV, Correia S, Figueira MI, Marques R, Maia CJ, Socorro S. Paradoxical and contradictory effects of imatinib in two cell line models of hormone-refractory prostate cancer. Prostate 2015; 75:923-35. [PMID: 25786656 DOI: 10.1002/pros.22976] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 01/13/2015] [Indexed: 01/26/2023]
Abstract
BACKGROUND Imatinib mesylate is a chemotherapeutic drug that inhibits the tyrosine kinase activity of c-KIT and has been successfully used to treat leukemias and some solid tumors. However, its application for treatment of hormone-refractory prostate cancer (HRPC) has shown modest effectiveness and did not follow the outcomes in cultured cells or animal models. Moreover, the molecular pathways by which imatinib induces cytotoxicity in prostate cancer cells are poorly characterized. METHODS Two cell line models of HRPC (DU145 and PC3) were exposed to 20 μM of imatinib for 6-72 hr. MTS assay was used to assess cell viability during the course of experiment. Gene expression analysis of c-KIT, cell-cycle and apoptosis regulators, and angiogenic factors was determined by means of real-time PCR, western blot, and/or immunocytochemistry. The enzymatic activity of the apoptosis effector, caspase-3, was determined by a colorimetric assay. RESULTS Imatinib significantly decreased the viability of DU145 cells but paradoxically augmented the viability of PC3 cells. DU145 cells displayed diminished expression of anti-apoptotic Bcl-2 protein and augmented levels of caspase-8 and -9, as well as, increased enzymatic activity of caspase-3 in response to imatinib. No differences existed on the expression levels of apoptosis-related proteins in PC3 cells treated with imatinib, though the activity of caspase-3 was decreased. The mRNA levels of angiogenic factor VEGF were decreased in DU145-treated cells, whereas an opposite effect was seen in PC3. In addition, it was shown that DU145 and PC3 cells present a differential expression of c-KIT protein variants. CONCLUSION DU145 and PC3 cells displayed a contradictory behavior in response to imatinib, which was underpinned by a distinct expression pattern (or activity) of target regulators of cell-cycle, apoptosis, and angiogenesis. The paradoxical effect of imatinib in PC3 cells may be related with the differential expression of c-KIT protein variants. Moreover, the present findings helped to understand the discrepancies in the efficacy of imatinib as therapeutic option in HRPC.
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Affiliation(s)
- Henrique J Cardoso
- CICS-UBI, Health Sciences Research Center, University of Beira Interior, Covilhã, Portugal
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Cellular Plasticity in Prostate Cancer Bone Metastasis. Prostate Cancer 2015; 2015:651580. [PMID: 26146569 PMCID: PMC4469842 DOI: 10.1155/2015/651580] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 05/12/2015] [Indexed: 12/13/2022] Open
Abstract
Purpose. Experimental data suggest that tumour cells can reversibly transition between epithelial and mesenchymal states (EMT and MET), a phenomenon known as cellular plasticity. The aim of this review was to appraise the clinical evidence for the role of cellular plasticity in prostate cancer (PC) bone metastasis. Methods. An electronic search was performed using PubMed for studies that have examined the differential expression of epithelial, mesenchymal, and stem cell markers in human PC bone metastasis tissues. Results. The review included nineteen studies. More than 60% of the studies used ≤20 bone metastasis samples, and there were several sources of heterogeneity between studies. Overall, most stem cell markers analysed, except for CXCR4, were positively expressed in bone metastasis tissues, while the expression of EMT and MET markers was heterogeneous between and within samples. Several EMT and stemness markers that are involved in osteomimicry, such as Notch, Met receptor, and Wnt/β pathway, were highly expressed in bone metastases. Conclusions. Clinical findings support the role of cellular plasticity in PC bone metastasis and suggest that epithelial and mesenchymal states cannot be taken in isolation when targeting PC bone metastasis. The paper also highlights several challenges in the clinical detection of cellular plasticity.
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Guo JH, Zhou J, Zhao Y, Liu PY, Yao HJ, Da J, Zhang M, Zhou Z, Chen Q, Peng YB, Wang Z. Normal peripheral prostate stromal cells stimulate prostate cancer development: roles of c-kit signal. Am J Transl Res 2015; 7:502-512. [PMID: 26045890 PMCID: PMC4448190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 02/08/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND To investigated the peripheral stromal cell conditioned medium (CM) -stimulated c-kit-JAK2-STAT1 pathway in prostate cancer. METHODS CM harvested from normal prostate peripheral stromal cells was added to DU145 cells. DU145 cell viability and migration were measured by cell counting kit-8 reagent and Transwell analysis respectively. Colony and sphere formation efficiencies of DU145 cells co-cultured with CM from human prostate stromal cells were also measured. DU145cells were stably transfected with lentivirus-mediated shRNA for c-kit silencing. RESULTS C-kit expression in prostate cancer was found to be significantly higher than in benign prostatic hyperplasia and positively associated with Gleason scores. The growth, migration and capacity of clonogenic property of DU145 cells significantly increased upon exposure to peripheral stromal CM and then were inhibited after silencing the expression of c-kit. The levels of c-kit, pJAK2 and pSTAT1 were significantly induced by peripheral zone stromal CM compared with controls in serum free medium and the levels of pJAK2 and pSTAT1 decreased after c-kit silencing. CONCLUSIONS C-kit hyper-expression promotes the development of prostate cancer. The peripheral stromal cell CM stimulated c-kit-JAK2-STAT1 pathway in prostate cancer cell viability, migration, and capacity of clonogenic property. This may lead to a greater understanding of the role of c-kit in prostate cancer and provide a potential therapeutic target for prostate cancer.
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Affiliation(s)
- Jian-Hua Guo
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
- Department of Urology, Shanghai Pudong Hospital, Fudan University Pudong Medical CentreShanghai 201399, China
| | - Juan Zhou
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Yang Zhao
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Peng-Yue Liu
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Hai-Jun Yao
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Jun Da
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Ming Zhang
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Zhe Zhou
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Qi Chen
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Yu-Bing Peng
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
| | - Zhong Wang
- Department of Urology and Andrology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of MedicineShanghai 200011, China
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Huang H, Hu M, Li P, Lu C, Li M. Mir-152 inhibits cell proliferation and colony formation of CD133(+) liver cancer stem cells by targeting KIT. Tumour Biol 2015; 36:921-8. [PMID: 25311946 DOI: 10.1007/s13277-014-2719-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 10/07/2014] [Indexed: 02/07/2023] Open
Abstract
miR152 is involved in diverse biological functions and development of disease. This study investigates the role of mir-152 in cell proliferation and colony formation of liver cancer stem cells. We show that exogenous overexpression of mir-152 suppresses cell proliferation and colony formation in CD133(+) hep3B cells. We also show that KIT is a direct target of miR-152 and miR-152 downregulates protein expression of KIT by directly binding to 3' untranslated region of KIT. Downregulation of KIT by specific siRNAs inhibits proliferation and colony formation of CD133(+) hep3B cells, which is similar to inhibitory effects of miR-152. Moreover, exogenous expression of KIT compromises inhibitory effects of miR-152 on cell proliferation and colony formation. Our findings suggest that mir-152 inhibits cell proliferation and colony formation of CD133(+) hep3B cells by targeting KIT.
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Affiliation(s)
- Haili Huang
- Clinical Research Center, the Affiliated Hospital of Guangdong Medical College, 524001, Zhanjiang, China
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Jung H, Song H, Yoon M. The KIT is a putative marker for differentiating spermatogonia in stallions. Anim Reprod Sci 2015; 152:39-46. [DOI: 10.1016/j.anireprosci.2014.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 10/18/2014] [Accepted: 11/13/2014] [Indexed: 11/26/2022]
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Özdemir BC, Hensel J, Secondini C, Wetterwald A, Schwaninger R, Fleischmann A, Raffelsberger W, Poch O, Delorenzi M, Temanni R, Mills IG, van der Pluijm G, Thalmann GN, Cecchini MG. The molecular signature of the stroma response in prostate cancer-induced osteoblastic bone metastasis highlights expansion of hematopoietic and prostate epithelial stem cell niches. PLoS One 2014; 9:e114530. [PMID: 25485970 PMCID: PMC4259356 DOI: 10.1371/journal.pone.0114530] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 11/10/2014] [Indexed: 01/18/2023] Open
Abstract
The reciprocal interaction between cancer cells and the tissue-specific stroma is critical for primary and metastatic tumor growth progression. Prostate cancer cells colonize preferentially bone (osteotropism), where they alter the physiological balance between osteoblast-mediated bone formation and osteoclast-mediated bone resorption, and elicit prevalently an osteoblastic response (osteoinduction). The molecular cues provided by osteoblasts for the survival and growth of bone metastatic prostate cancer cells are largely unknown. We exploited the sufficient divergence between human and mouse RNA sequences together with redefinition of highly species-specific gene arrays by computer-aided and experimental exclusion of cross-hybridizing oligonucleotide probes. This strategy allowed the dissection of the stroma (mouse) from the cancer cell (human) transcriptome in bone metastasis xenograft models of human osteoinductive prostate cancer cells (VCaP and C4-2B). As a result, we generated the osteoblastic bone metastasis-associated stroma transcriptome (OB-BMST). Subtraction of genes shared by inflammation, wound healing and desmoplastic responses, and by the tissue type-independent stroma responses to a variety of non-osteotropic and osteotropic primary cancers generated a curated gene signature ("Core" OB-BMST) putatively representing the bone marrow/bone-specific stroma response to prostate cancer-induced, osteoblastic bone metastasis. The expression pattern of three representative Core OB-BMST genes (PTN, EPHA3 and FSCN1) seems to confirm the bone specificity of this response. A robust induction of genes involved in osteogenesis and angiogenesis dominates both the OB-BMST and Core OB-BMST. This translates in an amplification of hematopoietic and, remarkably, prostate epithelial stem cell niche components that may function as a self-reinforcing bone metastatic niche providing a growth support specific for osteoinductive prostate cancer cells. The induction of this combinatorial stem cell niche is a novel mechanism that may also explain cancer cell osteotropism and local interference with hematopoiesis (myelophthisis). Accordingly, these stem cell niche components may represent innovative therapeutic targets and/or serum biomarkers in osteoblastic bone metastasis.
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Affiliation(s)
- Berna C. Özdemir
- Urology Research Laboratory, Department of Urology and Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Janine Hensel
- Urology Research Laboratory, Department of Urology and Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Chiara Secondini
- Urology Research Laboratory, Department of Urology and Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Antoinette Wetterwald
- Urology Research Laboratory, Department of Urology and Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Ruth Schwaninger
- Urology Research Laboratory, Department of Urology and Department of Clinical Research, University of Bern, Bern, Switzerland
| | | | | | - Olivier Poch
- ICube UMR7357, University of Strasbourg, Strasbourg, France
| | - Mauro Delorenzi
- Ludwig Center for Cancer Research, Department of Oncology, University of Lausanne and Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | - Ramzi Temanni
- Biomedical Informatics Division, Sidra Medical and Research Center, Doha, Qatar
| | - Ian G. Mills
- Prostate Cancer Research Group, Norway Centre for Molecular Medicine (NCMM), University of Oslo, Oslo, Norway
| | - Gabri van der Pluijm
- Department of Urology, Leiden University Medical Centre (LUMC), Leiden, The Netherlands
| | - George N. Thalmann
- Urology Research Laboratory, Department of Urology and Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Marco G. Cecchini
- Urology Research Laboratory, Department of Urology and Department of Clinical Research, University of Bern, Bern, Switzerland
- * E-mail:
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Cardoso HJ, Figueira MI, Correia S, Vaz CV, Socorro S. The SCF/c-KIT system in the male: Survival strategies in fertility and cancer. Mol Reprod Dev 2014; 81:1064-79. [PMID: 25359157 DOI: 10.1002/mrd.22430] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 09/25/2014] [Indexed: 12/18/2022]
Abstract
Maintaining the delicate balance between cell survival and death is of the utmost importance for the proper development of germ cells and subsequent fertility. On the other hand, the fine regulation of tissue homeostasis by mechanisms that control cell fate is a factor that can prevent carcinogenesis. c-KIT is a type III receptor tyrosine kinase activated by its ligand, stem cell factor (SCF). c-KIT signaling plays a crucial role in cell fate decisions, specifically controlling cell proliferation, differentiation, survival, and apoptosis. Indeed, deregulating the SCF/c-KIT system by attenuation or overactivation of its signaling strength is linked to male infertility and cancer, and rebalancing its activity via c-KIT inhibitors has proven beneficial in treating human tumors that contain gain-of-function mutations or overexpress c-KIT. This review addresses the roles of SCF and c-KIT in the male reproductive tract, and discusses the potential application of c-KIT target therapies in disorders of the reproductive system.
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Affiliation(s)
- Henrique J Cardoso
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
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46
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Phuchareon J, van Zante A, Overdevest JB, McCormick F, Eisele DW, Tetsu O. c-Kit Expression is Rate-Limiting for Stem Cell Factor-Mediated Disease Progression in Adenoid Cystic Carcinoma of the Salivary Glands. Transl Oncol 2014; 7:537-45. [PMID: 25389449 PMCID: PMC4225653 DOI: 10.1016/j.tranon.2014.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Revised: 07/21/2014] [Accepted: 07/29/2014] [Indexed: 01/25/2023] Open
Abstract
Adenoid cystic carcinoma (ACC) is an aggressive malignant neoplasm of the salivary glands in which c-Kit is overexpressed and activated, although the mechanism for this is as yet unclear. We analyzed 27 sporadic ACC tumor specimens to examine the biologic and clinical significance of c-Kit activation. Mutational analysis revealed expression of wild-type c-Kit in all, eliminating gene mutation as a cause of activation. Because stem cell factor (SCF) is c-Kit's sole ligand, we analyzed its expression in the tumor cells and their environment. Immunohistochemistry revealed its presence in c-Kit–positive tumor cells, suggesting an activation of autocrine signaling. We observed a significant induction of ERK1/2 in the cells. SCF staining was also found in other types of non-cancerous cells adjacent to tumors within salivary glands, including stromal fibroblasts, neutrophils, peripheral nerve, skeletal muscle, vascular endothelial cells, mucous acinar cells, and intercalated ducts. Quantitative PCR showed that the top quartile of c-Kit mRNA expression distinguished ACCs from normal salivary tissues and was cross-correlated with short-term poor prognosis. Expression levels of SCF and c-Kit were highly correlated in the cases with perineural invasion. These observations suggest that c-Kit is potentially activated by receptor dimerization upon stimulation by SCF in ACC, and that the highest quartile of c-Kit mRNA expression could be a predictor of poor prognosis. Our findings may support an avenue for c-Kit-targeted therapy to improve disease control in ACC patients harboring the top quartile of c-Kit mRNA expression.
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Affiliation(s)
- Janyaporn Phuchareon
- Head and Neck Cancer Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of California, San Francisco, CA ; UCSF Helen Diller Family Comprehensive Cancer Center, School of Medicine, University of California, San Francisco, CA
| | - Annemieke van Zante
- Department of Pathology, School of Medicine, University of California, San Francisco, CA
| | - Jonathan B Overdevest
- Head and Neck Cancer Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of California, San Francisco, CA
| | - Frank McCormick
- UCSF Helen Diller Family Comprehensive Cancer Center, School of Medicine, University of California, San Francisco, CA
| | - David W Eisele
- Head and Neck Cancer Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of California, San Francisco, CA ; UCSF Helen Diller Family Comprehensive Cancer Center, School of Medicine, University of California, San Francisco, CA
| | - Osamu Tetsu
- Head and Neck Cancer Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of California, San Francisco, CA ; UCSF Helen Diller Family Comprehensive Cancer Center, School of Medicine, University of California, San Francisco, CA
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Marech I, Gadaleta CD, Ranieri G. Possible prognostic and therapeutic significance of c-Kit expression, mast cell count and microvessel density in renal cell carcinoma. Int J Mol Sci 2014; 15:13060-76. [PMID: 25056544 PMCID: PMC4139891 DOI: 10.3390/ijms150713060] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 07/17/2014] [Accepted: 07/17/2014] [Indexed: 12/16/2022] Open
Abstract
Renal cell carcinoma (RCC) is the most frequent renal tumor and its incidence is increasing worldwide. Tumor angiogenesis is known to play a crucial role in the etiopathogenesis of RCC and over the last few years an even deeper knowledge of its contribution in metastatic RCC development has led to the development of numerous molecular targeting agents (such as sunitinib, sorafenib, pazopanib, axitinib, tivozanib, and dovitinib). The above agents are principally directed against vascular endothelial growth factor receptor (VEGFR) members and also against c-Kit receptor (c-KitR). The role of c-kitR inhibition on clear cell RCC (ccRCC), the main RCC subtype, is less well established. Whether c-kitR activation through its ligand, stem cell factor (SCF) contributes significantly to the effects of tyrosine kinase inhibitors (TKIs) treatment remains to be established. It is important to underscore that the c-KitR is expressed on mast cells (MCs) and cancer cells. After an examination of the c-KitR/SCF pathway, we review here the principal studies that have evaluated c-Kit expression in RCC. Moreover, we summarize some investigations that have observed the distribution of MCs in primary renal cancer and in adjacent normal tissue with appropriate histological immunohistochemical techniques. We also focus on few studies that have evaluated the correlation between RCC proliferation, MC count and microvessel density (MVD), as hallmarks of tumor angiogenesis. Thus, the aim of this review of the literature is to clarify if c-KitR expression, MC count and MVD could have prognostic significance and the possible predictive therapeutic implications in RCC.
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Affiliation(s)
- Ilaria Marech
- Diagnostic and Interventional Radiology Unit with Integrated Section of Translational Medical Oncology, National Cancer Research Centre Istituto Tumori "Giovanni Paolo II", Via Orazio Flacco n° 65, 70100 Bari, Italy.
| | - Cosmo Damiano Gadaleta
- Diagnostic and Interventional Radiology Unit with Integrated Section of Translational Medical Oncology, National Cancer Research Centre Istituto Tumori "Giovanni Paolo II", Via Orazio Flacco n° 65, 70100 Bari, Italy.
| | - Girolamo Ranieri
- Diagnostic and Interventional Radiology Unit with Integrated Section of Translational Medical Oncology, National Cancer Research Centre Istituto Tumori "Giovanni Paolo II", Via Orazio Flacco n° 65, 70100 Bari, Italy.
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Mainetti LE, Zhe X, Diedrich J, Saliganan AD, Cho WJ, Cher ML, Heath E, Fridman R, Kim HRC, Bonfil RD. Bone-induced c-kit expression in prostate cancer: a driver of intraosseous tumor growth. Int J Cancer 2014; 136:11-20. [PMID: 24798488 DOI: 10.1002/ijc.28948] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 04/28/2014] [Indexed: 12/11/2022]
Abstract
Loss of BRCA2 function stimulates prostate cancer (PCa) cell invasion and is associated with more aggressive and metastatic tumors in PCa patients. Concurrently, the receptor tyrosine kinase c-kit is highly expressed in skeletal metastases of PCa patients and induced in PCa cells placed into the bone microenvironment in experimental models. However, the precise requirement of c-kit for intraosseous growth of PCa and its relation to BRCA2 expression remain unexplored. Here, we show that c-kit expression promotes migration and invasion of PCa cells. Alongside, we found that c-kit expression in PCa cells parallels BRCA2 downregulation. Gene rescue experiments with human BRCA2 transgene in c-kit-transfected PCa cells resulted in reduction of c-kit protein expression and migration and invasion, suggesting a functional significance of BRCA2 downregulation by c-kit. The inverse association between c-kit and BRCA2 gene expressions in PCa cells was confirmed using laser capture microdissection in experimental intraosseous tumors and bone metastases of PCa patients. Inhibition of bone-induced c-kit expression in PCa cells transduced with lentiviral short hairpin RNA reduced intraosseous tumor incidence and growth. Overall, our results provide evidence of a novel pathway that links bone-induced c-kit expression in PCa cells to BRCA2 downregulation and supports bone metastasis.
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Affiliation(s)
- Leandro E Mainetti
- Department of Urology, Wayne State University School of Medicine, Detroit, MI
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c-Kit expression, angiogenesis, and grading in canine mast cell tumour: a unique model to study c-Kit driven human malignancies. BIOMED RESEARCH INTERNATIONAL 2014; 2014:730246. [PMID: 24900982 PMCID: PMC4036613 DOI: 10.1155/2014/730246] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 04/18/2014] [Indexed: 12/31/2022]
Abstract
Canine cutaneous mast cell tumour (CMCT) is a c-Kit driven tumour sharing similar c-Kit aberrations found in human gastrointestinal stromal tumour. CMCT is classified into three forms: well- (G1), intermediately (G2) (more benign diseases), and poorly (G3) differentiated (malignant) forms. We assess a correlation between c-Kit status, grading, and angiogenesis in CMCTs to explore their potential significance in humans. C-Kit receptor (c-KitR) expression, microvascular density (MVD), and mast cell granulated and degranulated status density (MCGD and MCDD, resp.) were analyzed in 97 CMCTs, by means of histochemistry, immunohistochemistry double staining, and image analysis system. Data showed that predominantly diffuse cytoplasmic- and predominantly focal paranuclear- (Golgi-like) c-Kit protein (PDC-c-Kit and PFP-c-Kit, resp.) expression correlate with high MVD, G3 histopathological grade, and MCDD. Moreover, predominant cell membrane-c-KitR (PCM-c-KitR) expression status correlates with low MVD, G1-G2 histopathological grade, and MCGD. These findings underline the key role of c-Kit in the biopathology of canine MCTs, indicating a link between aberrant c-Kit expression, increased angiogenesis, and higher histopathological grade. CMCT seems to be a model to study contributions of c-Kit activated MCs in tumour angiogenesis and to evaluate the inhibition of MCs activation by means of c-Kit tyrosine kinase inhibitors, currently translated in humans.
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Hoogland AM, Verhoef EI, Roobol MJ, Schröder FH, Wildhagen MF, van der Kwast TH, Jenster G, van Leenders GJLH. Validation of stem cell markers in clinical prostate cancer: α6-integrin is predictive for non-aggressive disease. Prostate 2014; 74:488-96. [PMID: 24375374 DOI: 10.1002/pros.22768] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 12/02/2013] [Indexed: 11/11/2022]
Abstract
BACKGROUND Stem cells are postulated to mediate prostate cancer progression, and represent a small fraction of the entire tumor. Various proteins (α2-integrin, α6-integrin, CD117, CD133, EZH2, OCT3/4) are associated with a prostate cancer stem cell phenotype in cell lines and xenografts. Our objective was to investigate expression of stem cell markers in clinical prostate cancer in relation to outcome. METHODS We validated immunohistochemical expression of stem cell markers in 481 prostate cancer patients and correlated expression with clinicopathologic parameters. RESULTS Sporadic expression of α2-integrin was present in a fraction of tumor cells (<5%) in 94.7% of tumors and associated with PSA > 10 ng/ml (P = 0.04). α6-Integrin expression (<5%) occurred in 28.4% patients, while ≥5% α6-integrin expression was associated with PSA≤10 ng/ml (P = 0.01), Gleason score <7 (P < 0.01) and pT2-disease (P = 0.02). α6-integrin was predictive for biochemical recurrence (P < 0.01), local recurrence (P = 0.03) and disease specific death (P = 0.03). EZH2 expression was generally low with 2.6% of tumors showing ≥1% positive cells. EZH2 was associated with Gleason score ≥7 (P = 0.01) and biochemical recurrence (P = 0.01). We did not identify expression of CD117, CD133, and OCT3/4 in prostate cancer samples. CONCLUSIONS Expression of α2-integrin and EZH2 in a small fraction of prostate cancer cells is supportive for their role as stem cell marker. Although α6-integrin was not a unique stem cell marker, it was predictive for prostate cancer biochemical and local recurrence, and disease specific death. The validity of CD117, CD133, and OCT3/4 as prostate cancer stem cell marker is questionable since these proteins were not expressed in clinical prostate cancer.
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Affiliation(s)
- A Marije Hoogland
- Department of Pathology, Erasmus Medical Center, Rotterdam, The Netherlands
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