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Okada R, Otsuka Y, Yokosuka O, Kato N, Imazaki F, Hoshino I, Sugiura N, Mizumoto H, Azemoto R, Kato K, Shimada H. Six autoantibodies as potential differential biomarkers of hepatocellular carcinoma vs. liver cirrhosis and chronic hepatitis: A prospective multi‑institutional study. Oncol Lett 2022; 24:367. [PMID: 36238856 PMCID: PMC9494420 DOI: 10.3892/ol.2022.13487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 08/03/2022] [Indexed: 11/28/2022] Open
Abstract
Serum autoantibodies respond not only to tumor-associated antigens of hepatocellular carcinoma (HCC) but also to those of liver cirrhosis (LC) and chronic hepatitis (CH). The present prospective multi-institutional study evaluated the diagnostic properties of six autoantibodies in distinguishing HCC from LC and CH. A total of 416 participants were enrolled: 149 With HCC, 76 with LC, 103 with CH and 88 healthy controls. Titers of serum autoantibodies to Sui1, RalA, p62, p53, c-myc and NY-ESO-1 were determined using enzyme-linked immunosorbent assays. All six antibodies were positive for HCC: s-Sui1-Abs (44%), s-RalA-Abs (23%), s-p62-Abs (21%), s-p53-Abs (13%), s-c-myc-Abs (11%) and s-NY-ESO-1-Abs (6%). The positivity rates of all six antibodies combined were 5% for healthy controls, 52% for CH, 58% for LC and 66% for HCC. The positivity rates of s-Sui1-Abs, s-RalA-Abs and s-p53-Abs were higher for HCC compared with those of LC and CH. However, the positivity rates of s-p62-Abs, s-c-myc-Abs and s-NY-ESO-1-Abs for HCC were not higher compared with those for LC and CH. Overall, autoantibodies were useful in differentiating patients with HCC from healthy individuals. However, they were not specific to HCC and were also present in the sera of individuals with CH and LC. These autoantibodies may be induced during the development of HCC. Clinical trial registration number: UMIN000014530 (date of registration 2011/07/11).
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Affiliation(s)
- Rei Okada
- Department of Surgery, School of Medicine, Toho University, Tokyo 143‑8541, Japan
| | - Yuichiro Otsuka
- Department of Surgery, School of Medicine, Toho University, Tokyo 143‑8541, Japan
| | - Osamu Yokosuka
- Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba‑shi, Chiba 260‑8677, Japan
| | - Naoya Kato
- Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba‑shi, Chiba 260‑8677, Japan
| | - Fumio Imazaki
- Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba‑shi, Chiba 260‑8677, Japan
| | - Isamu Hoshino
- Department of Surgery, Chiba Cancer Center, Chiba‑shi, Chiba 260‑8717, Japan
| | - Nobuyuki Sugiura
- Department of Gastroenterology, Japan Community Health Care Organization Chiba Hospital, Chiba‑shi, Chiba 260‑8710, Japan
| | - Hideaki Mizumoto
- Department of Gastroenterology, Funabashi Municipal Medical Center, Funabashi, Chiba 273‑8588, Japan
| | - Ryousaku Azemoto
- Department of Gastroenterology, Kimitsu Chuo Hospital, Kimitsu, Chiba 292‑8535, Japan
| | - Kazuki Kato
- Department of Gastroenterology, Japan Community Health Care Organization Funabashi Central Hospital, Funabashi, Chiba 273‑8556, Japan
| | - Hideaki Shimada
- Department of Surgery, School of Medicine, Toho University, Tokyo 143‑8541, Japan
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Richardson DS, Spehar JM, Han DT, Chakravarthy PA, Sizemore ST. The RAL Enigma: Distinct Roles of RALA and RALB in Cancer. Cells 2022; 11:cells11101645. [PMID: 35626682 PMCID: PMC9139244 DOI: 10.3390/cells11101645] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/29/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022] Open
Abstract
RALA and RALB are highly homologous small G proteins belonging to the RAS superfamily. Like other small GTPases, the RALs are molecular switches that can be toggled between inactive GDP-bound and active GTP-bound states to regulate diverse and critical cellular functions such as vesicle trafficking, filopodia formation, mitochondrial fission, and cytokinesis. The RAL paralogs are activated and inactivated by a shared set of guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs) and utilize similar sets of downstream effectors. In addition to their important roles in normal cell biology, the RALs are known to be critical mediators of cancer cell survival, invasion, migration, and metastasis. However, despite their substantial similarities, the RALs often display striking functional disparities in cancer. RALA and RALB can have redundant, unique, or even antagonistic functions depending on cancer type. The molecular basis for these discrepancies remains an important unanswered question in the field of cancer biology. In this review we examine the functions of the RAL paralogs in normal cellular physiology and cancer biology with special consideration provided to situations where the roles of RALA and RALB are non-redundant.
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3
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Xing M, Wang X, Kiken RA, He L, Zhang JY. Immunodiagnostic Biomarkers for Hepatocellular Carcinoma (HCC): The First Step in Detection and Treatment. Int J Mol Sci 2021; 22:6139. [PMID: 34200243 PMCID: PMC8201127 DOI: 10.3390/ijms22116139] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/27/2021] [Accepted: 05/27/2021] [Indexed: 12/24/2022] Open
Abstract
Hepatocellular carcinoma (HCC) exerts huge effects on the health burden of the world because of its high mortality and poor prognosis. HCC is often clinically detected late in patients. If HCC could be detected and treated earlier, the survival rate of patients will be greatly improved. Therefore, identifying specific biomarkers is urgent and important for HCC. The liver is also recognized as an immune organ. The occurrence of HCC is related to exacerbation of immune tolerance and/or immunosurveillance escape. The host immune system plays an important role in the recognition and targeting of tumor cells in cancer immunotherapy, as can be seen from the clinical success of immune checkpoint inhibitors and chimeric antigen receptor (CAR) T cells. Thus, there is a pressing medical need to discover immunodiagnostic biomarkers specific to HCC for understanding the pathological mechanisms of HCC, especially for immunotherapy targets. We have reviewed the existing literature to summarize the immunodiagnostic markers of HCC, including autoantibodies against tumor-associated antigens (TAAs) and exosomes, to provide new insights into HCC and early detection of this deadly cancer.
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Affiliation(s)
- Mengtao Xing
- Department of Pharmacology, China Pharmaceutical University, Nanjing 210009, China;
- Department of Biological Sciences & NIH-Sponsored Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX 79968, USA; (X.W.); (R.A.K.)
| | - Xinzhi Wang
- Department of Biological Sciences & NIH-Sponsored Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX 79968, USA; (X.W.); (R.A.K.)
- Jiangsu Key Laboratory of Drug Screening, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Robert A. Kiken
- Department of Biological Sciences & NIH-Sponsored Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX 79968, USA; (X.W.); (R.A.K.)
| | - Ling He
- Department of Pharmacology, China Pharmaceutical University, Nanjing 210009, China;
| | - Jian-Ying Zhang
- Department of Biological Sciences & NIH-Sponsored Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX 79968, USA; (X.W.); (R.A.K.)
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4
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Apken LH, Oeckinghaus A. The RAL signaling network: Cancer and beyond. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2020; 361:21-105. [PMID: 34074494 DOI: 10.1016/bs.ircmb.2020.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The RAL proteins RALA and RALB belong to the superfamily of small RAS-like GTPases (guanosine triphosphatases). RAL GTPases function as molecular switches in cells by cycling through GDP- and GTP-bound states, a process which is regulated by several guanine exchange factors (GEFs) and two heterodimeric GTPase activating proteins (GAPs). Since their discovery in the 1980s, RALA and RALB have been established to exert isoform-specific functions in central cellular processes such as exocytosis, endocytosis, actin organization and gene expression. Consequently, it is not surprising that an increasing number of physiological functions are discovered to be controlled by RAL, including neuronal plasticity, immune response, and glucose and lipid homeostasis. The critical importance of RAL GTPases for oncogenic RAS-driven cellular transformation and tumorigenesis still attracts most research interest. Here, RAL proteins are key drivers of cell migration, metastasis, anchorage-independent proliferation, and survival. This chapter provides an overview of normal and pathological functions of RAL GTPases and summarizes the current knowledge on the involvement of RAL in human disease as well as current therapeutic targeting strategies. In particular, molecular mechanisms that specifically control RAL activity and RAL effector usage in different scenarios are outlined, putting a spotlight on the complexity of the RAL GTPase signaling network and the emerging theme of RAS-independent regulation and relevance of RAL.
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Affiliation(s)
- Lisa H Apken
- Institute of Molecular Tumor Biology, Faculty of Medicine, University of Münster, Münster, Germany
| | - Andrea Oeckinghaus
- Institute of Molecular Tumor Biology, Faculty of Medicine, University of Münster, Münster, Germany.
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Welberry C, Macdonald I, McElveen J, Parsy-Kowalska C, Allen J, Healey G, Irving W, Murray A, Chapman C. Tumor-associated autoantibodies in combination with alpha-fetoprotein for detection of early stage hepatocellular carcinoma. PLoS One 2020; 15:e0232247. [PMID: 32374744 PMCID: PMC7202612 DOI: 10.1371/journal.pone.0232247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 04/10/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) continues to be a leading challenge in modern oncology. Early detection via blood-based screening tests has the potential to cause a stage-shift at diagnosis and improve clinical outcomes. Tumor associated autoantibodies (TA-AAbs) have previously shown the ability to distinguish HCC from patients with high-risk liver disease. This research aimed to further show the utility of TA-AAbs as biomarkers of HCC and assess their use in combination with Alpha-fetoprotein (AFP) for detection of HCC across multiple tumor stages. METHODS Levels of circulating G class antibodies to 44 recombinant tumor associated antigens and circulating AFP were measured in the serum of patients with HCC, non-cancerous chronic liver disease (NCCLD) and healthy controls via enzyme-linked immunosorbent assay (ELISA). TA-AAb cut-offs were set at the highest Youden's J statistic at a specificity ≥95.00%. Panels of TA-AAbs were formed using net reclassification improvement. AFP was assessed at a cut-off of 200 ng/ml. RESULTS Sensitivities ranged from 1.01% to 12.24% at specificities of 95.96% to 100.00% for single TA-AAbs. An ELISA test measuring a panel of 10 of these TA-AAbs achieved a combined sensitivity of 36.73% at a specificity of 89.89% when distinguishing HCC from NCCLD controls. At a cut-off of 200 ng/ml, AFP achieved a sensitivity of 31.63% at a specificity of 100.00% in the same cohort. Combination of the TA-AAb panel with AFP significantly increased the sensitivity for stage one (40.00%) and two (55.00%) HCC over the TA-AAb panel or AFP alone. CONCLUSIONS A panel of TA-AAbs in combination with AFP could be clinically relevant as a replacement for measuring levels of AFP alone in surveillance and diagnosis strategies. The increased early stage sensitivity could lead to a stage shift with positive prognostic outcomes.
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Affiliation(s)
- Christopher Welberry
- Oncimmune ltd, Nottingham, United Kingdom
- School of Medicine, University of Nottingham, Nottingham, United Kingdom
- * E-mail: ,
| | | | | | | | - Jared Allen
- Oncimmune ltd, Nottingham, United Kingdom
- School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | | | - William Irving
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
| | | | - Caroline Chapman
- School of Medicine, University of Nottingham, Nottingham, United Kingdom
- Bowel Cancer Screening Program, Nottingham University NHS Trust, Nottingham, United Kingdom
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6
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Li J, Dai L, Lei N, Xing M, Li P, Luo C, Casiano CA, Zhang JY. Evaluation and characterization of anti-RalA autoantibody as a potential serum biomarker in human prostate cancer. Oncotarget 2017; 7:43546-43556. [PMID: 27286458 PMCID: PMC5190043 DOI: 10.18632/oncotarget.9869] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 05/05/2016] [Indexed: 01/24/2023] Open
Abstract
Autoantibodies against intracellular tumor-associated antigens (TAAs) are commonly found in human cancers. In this study, we characterized the serum autoantibody response to the RalA, Ras-like GTPase, in patients with prostate cancer (PCa). The autoantibodies were detected by immunofluorescence assay in PCa cell lines, ELISA, and immunoblotting in 339 serum samples from patients with PCa and benign prostatic hyperplasia (BPH), and in normal human sera (NHS). The expression of RalA in prostate tumor tissues was evaluated by immunohistochemistry (IHC) in tumor microarrays. The autoantibody level to RalA (median) in NHS was significantly lower than in PCa (0.053 vs 0.138; P < 0.001) and BPH (0.053 vs 0.132; P < 0.005) groups. The circulating anti-RalA autoantibody could distinguish PCa patients from normal individuals with the area under the receiver operating characteristic (ROC) curve (AUC) performing at 0.861, with sensitivity of 52.9% and specificity of 91.0%. Elevation in serum immunoreactivity was observed in PCa patients after radical prostatectomy. The combined use of both anti-RalA autoantibody and PSA showed a significantly higher discriminatory ability compared with either of those markers alone. RalA protein expression was detected by IHC in 85.3% of tumor tissues from PCa patients, but without significant difference compared to BPH or normal control tissues. Together, our study shows the additional benefits of anti-RalA autoantibody as a potential serological biomarker for PCa, particularly in patients with normal PSA, and further demonstrate the utility of biomarker combinations in the immunodiagnosis of PCa.
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Affiliation(s)
- Jitian Li
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Liping Dai
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA.,Henan Key Laboratory of Tumor Epidemiology and Henan Academy of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Ningjing Lei
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Mengtao Xing
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Pei Li
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Chenglin Luo
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Carlos A Casiano
- Center for Health Disparities and Molecular Medicine, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - Jian-Ying Zhang
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA.,Henan Key Laboratory of Tumor Epidemiology and Henan Academy of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
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7
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Clinical significance of serum autoantibodies against Ras-like GTPases, RalA, in patients with esophageal squamous cell carcinoma. Esophagus 2015. [DOI: 10.1007/s10388-015-0510-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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8
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Zhou JW, Li Y, Yue LX, Luo CL, Chen Y, Zhang JY. Autoantibody response to Sui1 and its tissue-specific expression in hepatocellular carcinoma. Tumour Biol 2015; 37:2547-53. [DOI: 10.1007/s13277-015-4074-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 09/13/2015] [Indexed: 01/09/2023] Open
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9
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Muscatello L, Sarli G, Beha G, Asproni P, Millanta F, Poli A, De Tolla L, Benazzi C, Brunetti B. Validation of Tissue Microarray for Molecular Profiling of Canine and Feline Mammary Tumours. J Comp Pathol 2015; 152:153-60. [DOI: 10.1016/j.jcpa.2014.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 11/07/2014] [Accepted: 12/23/2014] [Indexed: 02/05/2023]
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10
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Ezzeldin M, Borrego-Diaz E, Taha M, Esfandyari T, Wise AL, Peng W, Rouyanian A, Asvadi Kermani A, Soleimani M, Patrad E, Lialyte K, Wang K, Williamson S, Abdulkarim B, Olyaee M, Farassati F. RalA signaling pathway as a therapeutic target in hepatocellular carcinoma (HCC). Mol Oncol 2014; 8:1043-53. [PMID: 24785097 DOI: 10.1016/j.molonc.2014.03.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 03/12/2014] [Accepted: 03/24/2014] [Indexed: 12/23/2022] Open
Abstract
Ral (Ras like) leads an important proto-oncogenic signaling pathway down-stream of Ras. In this work, RalA was found to be significantly overactivated in hepatocellular carcinoma (HCC) cells and tissues as compared to non-malignant samples. Other elements of RalA pathway such as RalBP1 and RalGDS were also expressed at higher levels in malignant samples. Inhibition of RalA by gene-specific silencing caused a robust decrease in the viability and invasiveness of HCC cells. Additionally, the use of geranyl-geranyl transferase inhibitor (GGTI, an inhibitor of Ral activation) and Aurora kinase inhibitor II resulted in a significant decrease in the proliferation of HCC cells. Furthermore, RalA activation was found to be at a higher level of activation in HCC stem cells that express CD133. Transgenic mouse model for HCC (FXR-Knockout) also revealed an elevated level of RalA-GTP in the liver tumors as compared to background animals. Finally, subcutaneous mouse model for HCC confirmed effectiveness of inhibition of aurora kinase/RalA pathway in reducing the tumorigenesis of HCC cells in vivo. In conclusion, RalA overactivation is an important determinant of malignant phenotype in differentiated and stem cells of HCC and can be considered as a target for therapeutic intervention.
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Affiliation(s)
- Mohamad Ezzeldin
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Emma Borrego-Diaz
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Mohammad Taha
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Tuba Esfandyari
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Amanda L Wise
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Warner Peng
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Alex Rouyanian
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Atabak Asvadi Kermani
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Mina Soleimani
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Elham Patrad
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Kristina Lialyte
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Kun Wang
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Stephen Williamson
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Bashar Abdulkarim
- The University of Kansas Medical Center, Department of Surgery, Kansas City, KS, USA
| | - Mojtaba Olyaee
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA
| | - Faris Farassati
- The University of Kansas Medical School, Divisions of Gastroenterology, Hepatology and Motility and Hematology/Oncology, Molecular Medicine Laboratory, Kansas City, KS, USA.
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Dai L, Ren P, Liu M, Imai H, Tan EM, Zhang JY. Using immunomic approach to enhance tumor-associated autoantibody detection in diagnosis of hepatocellular carcinoma. Clin Immunol 2014; 152:127-39. [PMID: 24667685 DOI: 10.1016/j.clim.2014.03.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Revised: 02/19/2014] [Accepted: 03/17/2014] [Indexed: 02/09/2023]
Abstract
To explore the possibility of using a mini-array of multiple tumor-associated antigens (TAAs) as an approach to the diagnosis of hepatocellular carcinoma (HCC), 14 TAAs were selected to examine autoantibodies in sera from patients with chronic hepatitis, liver cirrhosis and HCC by immunoassays. Antibody frequency to any individual TAA in HCC varied from 6.6% to 21.1%. With the successive addition of TAAs to the panel of TAAs, there was a stepwise increase of positive antibody reactions. The sensitivity and specificity of 14 TAAs for immunodiagnosis of HCC was 69.7% and 83.0%, respectively. This TAA mini-array also identified 43.8% of HCC patients who had normal alpha-fetoprotein (AFP) levels in serum. In summary, this study further supports the hypothesis that a customized TAA array used for detecting anti-TAA autoantibodies can constitute a promising and powerful tool for immunodiagnosis of HCC and may be especially useful in patients with normal AFP levels.
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Affiliation(s)
- Liping Dai
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Pengfei Ren
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Mei Liu
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Haruhiko Imai
- The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Eng M Tan
- The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Jian-Ying Zhang
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA.
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12
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Inhibition of small GTPase RalA regulates growth and arsenic-induced apoptosis in chronic myeloid leukemia (CML) cells. Cell Signal 2012; 24:1134-40. [DOI: 10.1016/j.cellsig.2012.01.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 01/27/2012] [Accepted: 01/27/2012] [Indexed: 11/20/2022]
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13
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Fei J, Li Y, Zhu X, Luo X. miR-181a post-transcriptionally downregulates oncogenic RalA and contributes to growth inhibition and apoptosis in chronic myelogenous leukemia (CML). PLoS One 2012; 7:e32834. [PMID: 22442671 PMCID: PMC3307705 DOI: 10.1371/journal.pone.0032834] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Accepted: 01/31/2012] [Indexed: 12/16/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of short RNAs that regulate gene expression through either translational repression or mRNA cleavage. miRNA-181a (miR-181a), one of the many miRNAs conserved among vertebrates, is differentially expressed in a variety of leukemia. However, its function in leukemia, particularly chronic myelogenous leukemia (CML), is poorly understood. Here we have reported the identification of miR-181a targets by combining TargetScan software prediction and expression profiling through overexpression of miR-181a mimic in leukemic K562 cells. Four overlapping genes were found to be the likely targets of miR-181a. Among the four genes, RalA is a downstream molecule of bcr-abl fusion protein in ras signaling pathway. However, its role in CML remains elusive. Luciferase reporter and Western blot assays confirmed that RalA is a direct target of miR-181a. overexpression of miR-181a effectively suppresses cell growth and induces G2-phase arrest and apoptosis partially by targeting RalA in leukemic K562 cells. Using the KEGG database combined with recent publications, downstream signaling pathway of RalA was graphed by cytoscape software. Therefore, our study is the first to report that RalA is directly regulated by miR-181a and plays an important role in CML. The approach of computational prediction combined with expression profiling might be valuable for the identification of miRNA targets in animal.
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MESH Headings
- Animals
- Apoptosis
- Databases, Protein
- Down-Regulation
- Gene Expression Regulation, Leukemic
- Humans
- K562 Cells
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- MicroRNAs/genetics
- MicroRNAs/metabolism
- Models, Biological
- Neoplasm Proteins/biosynthesis
- Neoplasm Proteins/genetics
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- ral GTP-Binding Proteins/biosynthesis
- ral GTP-Binding Proteins/genetics
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Affiliation(s)
- Jia Fei
- Department of Biochemistry and Molecular Biology, Medical College of Jinan University, Guangzhou, China.
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14
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Liu H, Zhang J, Wang S, Pang Z, Wang Z, Zhou W, Wu M. Screening of autoantibodies as potential biomarkers for hepatocellular carcinoma by using T7 phase display system. Cancer Epidemiol 2011; 36:82-8. [PMID: 22018955 DOI: 10.1016/j.canep.2011.04.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 04/04/2011] [Accepted: 04/13/2011] [Indexed: 01/29/2023]
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is one of the most common tumors worldwide. Autoantibodies to tumor-associated proteins in the serum profile, as new biomarkers, may improve the early detection of HCC. METHODS In this study, we interrogated a HCC cDNA T7 phage library for tumor-associated proteins using biopan enrichment techniques with HCC patient and normal sera. The enrichment of tumor-associated proteins after biopanning was tested using plaque assay and immunochemical detection. The putative tumor-associated phage clones were collected for PCR and sequencing analysis. Identities of those selected sequences were revealed through the sequence BLAST program. The identified phage-expressed proteins were then used to develop phage protein ELISA to measure matching autoantibodies using 70 HCC patients, 50 chronic hepatitis patients, and 70 normal serum samples. The logistic regression model and leave-one-out validation were used to evaluate predictive accuracies with a single marker as well as with combined markers. RESULTS Twenty-six phage-displayed proteins have sequence identity with known or putative tumor-associated proteins. Immunochemical reactivity of patient sera with phage-expressed proteins showed that the autoantibodies to phage-expressed protein CENPF, DDX3, HSPA4, HSPA5, VIM, LMNB1, and TP53 had statistical significance in HCC patients. Measurements of the seven autoantibodies combined in a logistic regression model showed that combined measurements of these autoantibodies was more predictive of disease than any single antibody alone, underscoring the importance of identifying multiple potential markers. CONCLUSION Autoantibody in the serum profiling is a promising approach for early detection and diagnosis of HCC. The panel of autoantibodies appears preferable to achieve superior accuracy rather than an autoantibody alone, and may have significant relevance to tumor biology, novel drug development, and immunotherapies.
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Affiliation(s)
- Hui Liu
- Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, PR China
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