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Muench MO, Fomin ME, Gutierrez AG, López-Terrada D, Gilfanova R, Nosworthy C, Beyer AI, Ostolaza G, Kats D, Matlock KL, Cairo S, Keller C. CD203c is expressed by human fetal hepatoblasts and distinguishes subsets of hepatoblastoma. Front Oncol 2023; 13:927852. [PMID: 36845728 PMCID: PMC9947649 DOI: 10.3389/fonc.2023.927852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 01/19/2023] [Indexed: 02/11/2023] Open
Abstract
Background & Aims Hepatocytic cells found during prenatal development have unique features compared to their adult counterparts, and are believed to be the precursors of pediatric hepatoblastoma. The cell-surface phenotype of hepatoblasts and hepatoblastoma cell lines was evaluated to discover new markers of these cells and gain insight into the development of hepatocytic cells and the phenotypes and origins of hepatoblastoma. Methods Human midgestation livers and four pediatric hepatoblastoma cell lines were screened using flow cytometry. Expression of over 300 antigens was evaluated on hepatoblasts defined by their expression of CD326 (EpCAM) and CD14. Also analyzed were hematopoietic cells, expressing CD45, and liver sinusoidal-endothelial cells (LSECs), expressing CD14 but lacking CD45 expression. Select antigens were further examined by fluorescence immunomicroscopy of fetal liver sections. Antigen expression was also confirmed on cultured cells by both methods. Gene expression analysis by liver cells, 6 hepatoblastoma cell lines, and hepatoblastoma cells was performed. Immunohistochemistry was used to evaluate CD203c, CD326, and cytokeratin-19 expression on three hepatoblastoma tumors. Results Antibody screening identified many cell surface markers commonly or divergently expressed by hematopoietic cells, LSECs, and hepatoblasts. Thirteen novel markers expressed on fetal hepatoblasts were identified including ectonucleotide pyrophosphatase/phosphodiesterase family member 3 (ENPP-3/CD203c), which was found to be expressed by hepatoblasts with widespread expression in the parenchyma of the fetal liver. In culture CD203c+CD326++ cells resembled hepatocytic cells with coexpression of albumin and cytokeratin-19 confirming a hepatoblast phenotype. CD203c expression declined rapidly in culture whereas the loss of CD326 was not as pronounced. CD203c and CD326 were co-expressed on a subset of hepatoblastoma cell lines and hepatoblastomas with an embryonal pattern. Conclusions CD203c is expressed on hepatoblasts and may play a role in purinergic signaling in the developing liver. Hepatoblastoma cell lines were found to consist of two broad phenotypes consisting of a cholangiocyte-like phenotype that expressed CD203c and CD326 and a hepatocyte-like phenotype with diminished expression of these markers. CD203c was expressed by some hepatoblastoma tumors and may represent a marker of a less differentiated embryonal component.
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Affiliation(s)
- Marcus O. Muench
- Vitalant Research Institute, San Francisco, CA, United States,Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, United States,*Correspondence: Marcus O. Muench,
| | - Marina E. Fomin
- Vitalant Research Institute, San Francisco, CA, United States
| | | | - Dolores López-Terrada
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, United States,Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, United States
| | | | | | - Ashley I. Beyer
- Vitalant Research Institute, San Francisco, CA, United States
| | | | - Dina Kats
- Pediatric Cancer Biology, Children’s Cancer Therapy Development Institute, Beaverton, OR, United States
| | | | - Stefano Cairo
- Research and Development Unit, XenTech, Evry, France
| | - Charles Keller
- Pediatric Cancer Biology, Children’s Cancer Therapy Development Institute, Beaverton, OR, United States
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miR-126 in Extracellular Vesicles Derived from Hepatoblastoma Cells Promotes the Tumorigenesis of Hepatoblastoma through Inducing the Differentiation of BMSCs into Cancer Stem Cells. J Immunol Res 2021; 2021:6744715. [PMID: 34746322 PMCID: PMC8570887 DOI: 10.1155/2021/6744715] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/24/2021] [Accepted: 10/11/2021] [Indexed: 12/15/2022] Open
Abstract
Background Extracellular vesicles (EVs) can deliver miRNAs between cells and play a crucial role in hepatoblastoma progression. In this study, we explored the differentially expressed miRNAs related to tumor cell-derived EVs and the mechanism by which EVs regulate hepatoblastoma progression. Methods Bioinformatics analysis was performed to explore the differentially expressed miRNAs between the hepatoblastoma and adjacent normal tissues. TEM, NTA, and western blotting were conducted to identify EVs. The expression of miR-126-3p, miR-126-5p, miR-30b-3p, miR-30b-3p, SRY, IL-1α, IL-6, and TGF-β was detected by RT-qPCR. Immunofluorescence (IF) was used to analyze the expression of PKH67, and flow cytometry was applied to assess the ratio of CD44+ CD90+ CD133+ cells. ELISA was used to evaluate the levels of IL-6 and TGF-β. A xenograft mouse model was constructed to detect the function of EVs with downregulated miR-126. IHC was performed to calculate β-catenin levels in tumor tissues. Results miR-126 was upregulated in hepatoblastoma. EVs derived from hepatoblastoma cells significantly increased the ratio of CD44+ CD90+ CD133+ cells and increased the expression of IL-6, Oct4, SRY, and TGF-β in bone marrow mesenchymal stem cells (BMSCs), while EVs with downregulated miR-126 reversed these phenomena. miR-126 downregulation notably attenuated hepatoblastoma tumor growth and decreased the ratio of CD44+ CD90+ CD133+ cells and increased the expression of IL-6, Oct4, SRY, TGF-β, and β-catenin in tumor tissues of mice. Furthermore, EVs with downregulated miR-126 inhibited the differentiation of BMSCs into cancer stem cells. Conclusions Exosomal miR-126 derived from hepatoblastoma cells promoted the tumorigenesis of liver cancer through inducing the differentiation of BMSCs into cancer stem cells.
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Abstract
The epithelial cell adhesion molecule (EpCAM) is involved in oncogenesis of hepatoblastomas (HBs). Prior genomic profiling studies showed higher EpCAM expression and worse prognosis in HBs containing primitive histotypes, however, this has not been fully addressed from an immunohistochemical perspective. Our goal is to characterize differential EpCAM immunohistochemistry (EpCAM-IHC) among HBs histotypes. We retrieved 62 HBs from 52 patients. EpCAM-IHC was performed (anti-MOC-31, 1:50 dilution; Cell Marque Corporation, Rocklin, CA) and graded in histotypes using the immunoreactive score. The median age of patients was 2 years (range: 0.4 to 9 y) with a M:F ratio of 1.9. Outcome information was available in 38 patients (alive=30, alive with disease=3, and deceased=5) with median follow-up of 60 months (range: 2 to 171 mo). EpCAM-IHC showed notable overexpression (immunoreactive score >4) in embryonal (89%) and crowded fetal (74%) in contrast to glandular (33%), well-differentiated fetal (32%), and small cell undifferentiated/blastemal (3%) components. Mesenchymal elements were negative. In summary, EpCAM-IHC is helpful to distinguish between epithelial components as it is progressively lost in the transition from embryonal to crowded fetal and into well-differentiated fetal histotypes. Its preferential expression among primitive HBs might have therapeutic and prognostic implications. The significance of its largely negative expression in small cell undifferentiated/blastema is interesting despite its presumed immaturity, deserving further studies.
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Zhi T, Zhang WL, Zhang Y, Hu HM, Wang YZ, Huang DS. A new risk-stratification system for hepatoblastoma in children under six years old and the significance for prognosis evaluation-a 14-year retrospective study from a single center. BMC Cancer 2021; 21:397. [PMID: 33849485 PMCID: PMC8042704 DOI: 10.1186/s12885-021-08095-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 03/24/2021] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND This study explores and analyzes the clinical characteristics and prognostic factors of hepatoblastoma (HB) in children under 6 years old and establishes a new risk-stratification system for individualized therapy. METHODS The clinical data of 382 pediatric patients under 6 years old (231 males and 151 females) who had been diagnosed with HB by pathology between May 2005 and May 2019 were collected. By analyzing the risk factors influencing the survival rate of patients with HB, a new risk-stratification system was established, and it was compared with previous risk-stratification systems by a receiver operating characteristic (ROC) curve. RESULTS (1) According to a Kaplan-Meier survival analysis, the one-year, three-year, and five-year overall survival (OS) was 93.7, 84.0, and 73.9%, respectively, and the event-free survival (EFS) was 90.5, 79.2, and 67.5%, respectively. (2) The independent risk factors influencing prognosis in pediatric patients with HB were alpha-fetoprotein (AFP) < 100 ng/ml or > 1000 ng/ml (HR = 3.341, P = 0.005); platelet count > 400 × 109/L (pooled hazard ratio [HR] = 2.123, P = 0.026); PRETEXT stage IV (HR = 4.026, P = 0.001); vascular involvement (HR = 2.178, P = 0.019); distant metastasis (HR = 2.634, P = 0.010);and multifocality (HR = 2.215, P = 0.012). (3) A new risk-stratification system was established and divided into three groups: low risk, moderate risk, and high risk. There were statistical differences among the three groups (P = 0.002). Compared with the previous risk-staging systems, there was no significant difference in the survival rate. Although the effect in the guiding therapy was the same, the area under the curve for the ROC curve was 0.835 (95% CI: 0.784-0.885) for the new stratification system. CONCLUSION This new risk-stratification system had a better predictive value for the prognosis of pediatric patients with HB than other stratification systems.
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Affiliation(s)
- Tian Zhi
- Department of Pediatrics, Beijing Tongren Hospital Capital Medical University, No. 1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China
| | - Wei-Ling Zhang
- Department of Pediatrics, Beijing Tongren Hospital Capital Medical University, No. 1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China
| | - Yi Zhang
- Department of Pediatrics, Beijing Tongren Hospital Capital Medical University, No. 1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China
| | - Hui-Min Hu
- Department of Pediatrics, Beijing Tongren Hospital Capital Medical University, No. 1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China
| | - Yi-Zhuo Wang
- Department of Pediatrics, Beijing Tongren Hospital Capital Medical University, No. 1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China
| | - Dong-Sheng Huang
- Department of Pediatrics, Beijing Tongren Hospital Capital Medical University, No. 1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China.
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Grabski DF, Ratan A, Gray LR, Bekiranov S, Rekosh D, Hammarskjold ML, Rasmussen SK. Upregulation of human endogenous retrovirus-K (HML-2) mRNAs in hepatoblastoma: Identification of potential new immunotherapeutic targets and biomarkers. J Pediatr Surg 2021; 56:286-292. [PMID: 32682541 DOI: 10.1016/j.jpedsurg.2020.05.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/28/2020] [Accepted: 05/18/2020] [Indexed: 12/28/2022]
Abstract
PURPOSE Hepatoblastoma is the most common liver malignancy in children. In order to advance therapy against hepatoblastoma, novel immunologic targets and biomarkers are needed. Our purpose in this investigation is to examine hepatoblastoma transcriptomes for the expression of a class of genomic elements known as Human Endogenous Retrovirus (HERVs). HERVs are abundant in the human genome and are biologically active elements that have been associated with multiple malignancies and proposed as immunologic targets in a subset of tumors. A sub-family of HERVs, HERV-K(HML-2) (HERV-K), have been shown to be tightly regulated in fetal development, making investigation of these elements in pediatric tumors paramount. METHODS We first created a HERVK-FASTA file utilizing 91 previously described HML-2 proviruses. We then concatenated the file onto the GRCh38.95 cDNA library from Ensembl. We used this reference database to evaluate existing RNA-seq data from 10 hepatoblastoma tumors and 3 normal liver controls (GEO accession ID: GSE8977575). Quantification and differential proviral expression analysis between hepatoblastoma and normal liver controls was performed using the pseudo-alignment program Salmon and DESeq2, respectively. RESULTS HERV-K mRNA was expressed in hepatoblastoma from multiple proviral loci. All expressed HERV-K proviral loci were upregulated in hepatoblastoma compared to normal liver controls. Five HERV-K proviruses (1q21.3, 3q27.2, 7q22.2, 12q24.33 and 17p13.1) were significantly differentially expressed (p-adjusted value <0.05, |log2 fold change| > 1.5) across conditions. The provirus at 17p13.1 had an approximately 300-fold increased expression in hepatoblastoma as compared to normal liver. This was in part due to the near absence of HERV-K mRNA at the 17p13.1 locus in fully differentiated liver samples. CONCLUSIONS Our investigation demonstrates that HERV-K is expressed from multiple loci in hepatoblastoma and that the expression is increased for several proviruses compared to normal liver controls. Our results suggest that HERV-K mRNA expression may be useful as a biomarker in hepatoblastoma, given the large differential expression profiles in hepatoblastoma, with very low mRNA levels in liver control samples.
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Affiliation(s)
- David F Grabski
- Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia; Myles H. Thaler Center for AIDS and Human Retrovirus Research, University of Virginia, Charlottesville, Virginia
| | - Aakrosh Ratan
- Center for Public Health Genomics, Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Laurie R Gray
- Myles H. Thaler Center for AIDS and Human Retrovirus Research, University of Virginia, Charlottesville, Virginia; Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Stefan Bekiranov
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, Virginia
| | - David Rekosh
- Myles H. Thaler Center for AIDS and Human Retrovirus Research, University of Virginia, Charlottesville, Virginia; Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Marie-Louise Hammarskjold
- Myles H. Thaler Center for AIDS and Human Retrovirus Research, University of Virginia, Charlottesville, Virginia; Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Sara K Rasmussen
- Myles H. Thaler Center for AIDS and Human Retrovirus Research, University of Virginia, Charlottesville, Virginia; Seattle Children's Hospital, Division of Transplantation, University of Washington Department of Surgery, 4800 Sand Point Way, Seattle, WA 98105.
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Abbas AA, Samkari AM, Almehdar AS. Hepatoblastoma: Review of Pathology, Diagnosis and Modern Treatment Strategies. CURRENT CANCER THERAPY REVIEWS 2020. [DOI: 10.2174/1573394716666200206103826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hepatoblastoma (HB) is the most common primary malignant hepatic tumor of childhood
and, occurring predominantly in the first two years of life. Approximately 100 cases are diagnosed
every year in the United States of America. The management of HB has changed markedly
over the last three decades. Alfa feto protein (AFP) and beta human chorionic gonadotrophin (beta
HCG) are the main tumor markers and are markers for diagnosis and follow up. International collaborative
efforts have led to the implementation of the Pre - Treatment Extent of the Disease PRETEXT
staging system consensus classification to assess upfront resectability. Complete surgical
resection plays a key role in successful management. Overall, outcomes have greatly improved over
the past decades mainly because of advances in chemotherapy (CTR) agents and administration
protocols, newer surgical approaches and liver transplantation (LT). Targeted medications towards
the newly discovered β-catenin and Wnt genetic pathways in tumor cells may soon become an option
for treatment. The current disease free survival (DFS) rates are approaching 85%. For the 25%
of patients with metastasis at presentation, the overall survival (OS) remains poor. A more individualized
approach to treating the heterogeneous spectrum of HB may become the basis of successful
treatment in complex cases. Newer medications and surgical techniques are being exploited.
Here we present a comprehensive review of the recent advances in the management of HB. A wide
literature search was made using internet search engines such as PubMed and Google scholar. More
than 100 articles were reviewed and the information extrapolated was arranged to produce this
review.
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Affiliation(s)
- Adil A. Abbas
- Pediatric Hematology/Oncology Section, College of Medicine, Princess Nourah Oncology Centre, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Jeddah, Saudi Arabia
| | - Alaa M.N. Samkari
- Department of Laboratory Medicine, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Jeddah, Saudi Arabia
| | - Abeer S. Almehdar
- Department of Medical Imaging, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Jeddah, Saudi Arabia
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Hsu WY, Chang HH, Lu MY, Yang YL, Jou ST, Chen HL, Ni YH, Hsu HY, Chang MH, Wu JF. Clinical risk stratification of children with SIOPEL high-risk hepatoblastoma in Taiwan. Pediatr Neonatol 2020; 61:393-398. [PMID: 32291200 DOI: 10.1016/j.pedneo.2020.03.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 08/16/2019] [Accepted: 03/18/2020] [Indexed: 10/24/2022] Open
Abstract
BACKGORUND Hepatoblastoma is the most common primary liver malignancy in young children. METHODS To identify predictors of the clinical outcomes of hepatoblastoma, we retrospectively reviewed the medical records of 45 children with hepatoblastoma in the National Taiwan University Hospital from 1998 to 2018. All of the children were classified as high risk according to the pretreatment extent of disease (PRETEXT) staging system. The patients' clinical data (sex, age at diagnosis, PRETEXT status, presence of metastasis or tumor rupture, tumor pathologic type, and clinical outcomes) were analyzed. RESULTS A total of 45 children with high-risk hepatoblastoma were diagnosed at an average age of 3.2 years. The survival analysis showed that the event-free survival duration was significantly longer in patients aged ≤1.25 years at diagnosis than those >1.25 years (hazard ratio = 2.86, p = 0.036). The absence of initial tumor rupture was associated with longer event-free survival (hazard ratio = 2.74, p = 0.039). Diagnosis at age >1.25 years was correlated with the presence of multifocal liver tumors (p = 0.0002) and tumor rupture at diagnosis (p = 0.02). There was no significant difference in event-free survival between the groups classified as intermediate versus high risk according to the Children's Hepatic tumors International Collaboration hepatoblastoma stratification system (p = 0.13). CONCLUSIONS Diagnosis at ≤ 1.25 years of age and absence of initial tumor rupture were predictive of a good clinical prognosis in Taiwanese children with hepatoblastoma.
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Affiliation(s)
- Wei-Yun Hsu
- Department of Pediatrics, Chi-Mei Medical Center, Tainan, Taiwan; Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Hsiu-Hao Chang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Meng-Yao Lu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Yung-Li Yang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Shiann-Tarng Jou
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Huey-Ling Chen
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Yen-Hsuan Ni
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Hong-Yuan Hsu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Mei-Hwei Chang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Jia-Feng Wu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
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Intracellular localization of beta-catenin expression plays a possible prognostic role on the outcome of hepatoblastoma patients. Pediatr Surg Int 2020; 36:817-825. [PMID: 32436062 DOI: 10.1007/s00383-020-04672-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/08/2020] [Indexed: 10/25/2022]
Abstract
PURPOSE Wnt/Beta-catenin pathway plays an essential role in liver development and regeneration. Abnormal activation in this pathway leads to development of hepatoblastoma (HB). Although its importance has invoked attention, its prognostic role is debatable. We aimed to evaluate the significance of intracellular localization of beta-catenin (BC) expression in the outcome of hepatoblastoma patients. METHODS Medical records of HB patients between 2004 and 2018 were reviewed. Patients were grouped according to intracellular localization of BC expression by immunohistochemistry as being cytoplasmic or nuclear. Demographics, radiological images, PRETEXT classifications, vascular involvement, risk groups, chemotherapy responses, and survival rates were analyzed and compared between groups. RESULTS There were 41 patients. Thirteen patients were excluded for unavailability of records in four, negative/unclear BC expressions in seven. Cytoplasmic expression of BC was observed in 17 patients whereas 13 patients displayed nuclear expression. Demographics were similar in both groups. Cytoplasmic BC expression was associated with poor chemotherapy response (p = 0.001) and increased vascular involvement (p = 0.0162) requiring more extensive surgeries (p = 0.039). CONCLUSION Although the numbers are limited in our series, the intracellular localization of BC expression has been found to be a promising determining factor for hepatoblastoma prognosis. With larger patient series, more reliable results can be achieved.
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Dysregulation of liver developmental microRNA contribute to hepatic carcinogenesis. J Formos Med Assoc 2019; 119:1041-1051. [PMID: 31627983 DOI: 10.1016/j.jfma.2019.09.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/31/2019] [Accepted: 09/27/2019] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND/PURPOSE To investigate the role of microRNA (miRNA) dysregulation in liver cancer by assessing the miRNA profiles of human hepatic stem cells (HpSCs), marker-carrying human hepatoblastoma (HB) cells, and hepatocellular carcinoma (HCC) cells vs. those of fetal hepatocytes. METHODS We subjected human HCC and HB tumor specimens to immunohistochemical (IHC) staining for markers of HpSCs. We analyzed the miRNA patterns of HpSCs, HCC cells, HB cells, and fetal hepatocytes using microarray analysis, with confirmation via quantitative real-time polymerase chain reaction. The roles of the miRNAs in liver cancer stem cells (CSCs) were also elucidated. RESULTS The epithelial cell adhesion molecule (EpCAM) was the most prevalent HpSCs marker in human HB and HCC tumor cells and hepatoma cells. EpCAM-positive HB and HCC cells exhibited greater self-renewal and tumorigenicity than their EpCAM-negative counterparts or EpCAM-positive fetal hepatocytes. In EpCAM-positive fetal hepatocytes, miR-126 expression level increased with gestational age. The EpCAM-positive HB cells exhibited downregulation of miR-126 in comparison to EpCAM-positive fetal hepatocytes. An miR-126 mimic reduced sphere and colony formation in, and induced apoptosis of, HB cells. In comparison to EpCAM-positive fetal hepatocytes, EpCAM-positive HCC cells exhibited downregulation of miR-126, miR-144, and miR-451. Transfection of miR-126, miR-144, and miR-451 induced apoptosis of, and reduced sphere and colony formation in, HCC cells. CONCLUSION Dysregulation of liver developmental miRNAs, which exert a tumor suppressant effect, in EpCAM-positive HpSCs may contribute to liver carcinogenesis by promoting the transformation of HpSCs to CSCs of HB and HCC.
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Yoon HM, Hwang J, Kim KW, Namgoong JM, Kim DY, Koh KN, Kim H, Cho YA. Prognostic Factors for Event-Free Survival in Pediatric Patients with Hepatoblastoma Based on the 2017 PRETEXT and CHIC-HS Systems. Cancers (Basel) 2019; 11:cancers11091387. [PMID: 31540387 PMCID: PMC6769992 DOI: 10.3390/cancers11091387] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/11/2019] [Accepted: 09/11/2019] [Indexed: 11/16/2022] Open
Abstract
This study aimed to evaluate the prognostic value of variables used in the 2017 PRE-Treatment EXTent of tumor (PRETEXT) system and the Children's Hepatic tumors International Collaboration-Hepatoblastoma Stratification (CHIC-HS) system in pediatric patients with hepatoblastoma. A retrospective analysis of data from the pediatric hepatoblastoma registry of a tertiary referral center was conducted to evaluate the clinical and imaging variables (annotation factors) of the PRETEXT staging system. The primary outcome was event-free survival (EFS). Data from 84 patients (mean age: 2.9 ± 3.5 years) identified between 1998 and 2017 were included. Univariable Cox proportional hazards analysis revealed that PRETEXT annotation factors P (portal vein involvement), F (multifocality of tumor), and M (distant metastasis) showed a significant negative association with EFS. Multivariable Cox proportional hazard analysis showed that factor F was the strongest predictor (HR (hazard ratio), 2.908; 95% CI (confidence interval), 1.061-7.972; p = 0.038), whereas factor M showed borderline significance (HR, 2.416; 95% CI, 0.918-6.354; p = 0.074). The prediction model based on F and M (F + M) showed good performance to predict EFS (C-statistic, 0.734; 95% CI, 0.612-0.854). In conclusion, the PRETEXT annotation factor F was the strongest predictor of EFS, and the F + M model showed good performance to predict EFS in pediatric patients with hepatoblastoma.
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Affiliation(s)
- Hee Mang Yoon
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea.
| | - Jisun Hwang
- Department of Radiology, Dongtan Sacred Heart Hospital, Hallym University Medical Center, Hwaseong 18450, Korea.
| | - Kyung Won Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea.
| | - Jung-Man Namgoong
- Department of Pediatric Surgery, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul 05505, Korea.
| | - Dae Yeon Kim
- Department of Pediatric Surgery, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul 05505, Korea.
| | - Kyung-Nam Koh
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul 05505, Korea.
| | - Hyery Kim
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul 05505, Korea.
| | - Young Ah Cho
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea.
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