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Li K, Tian H. Development of small-molecule immune checkpoint inhibitors of PD-1/PD-L1 as a new therapeutic strategy for tumour immunotherapy. J Drug Target 2018; 27:244-256. [PMID: 29448849 DOI: 10.1080/1061186x.2018.1440400] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Cancer immunotherapy has been increasingly utilised to treat advanced malignancies. The signalling network of immune checkpoints has attracted considerable attention. Immune checkpoint inhibitors are revolutionising the treatment options and expectations for patients with cancer. The reported clinical success of targeting the T-cell immune checkpoint receptors PD-1/PD-L1 has demonstrated the importance of immune modulation. Indeed, antibodies binding to PD-1 or PD-L1 have shown remarkable efficacy. However, antibody drugs have many disadvantages, such as their production cost, stability, and immunogenicity and, therefore, small-molecule inhibitors of PD-1 and its ligand PD-L1 are being introduced. Small-molecule inhibitors could offer inherent advantages in terms of pharmacokinetics and druggability, thereby providing additional methods for cancer treatment and achieving better therapeutic effects. In this review, we first discuss how PD-1/PD-L1-targeting inhibitors modulate the relationship between immune cells and tumour cells in tumour immunotherapy. Second, we discuss how the immunomodulatory potential of these inhibitors can be exploited via rational combinations with immunotherapy and targeted therapy. Third, this review is the first to summarise the current clinical and preclinical evidence regarding small-molecule inhibitors of the PD-1/PD-L1 immune checkpoint, considering features and responses related to the tumours and to the host immune system.
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Affiliation(s)
- Kui Li
- a Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine , Chinese Academy of Medical Science & Peking Union Medical College , Tianjin , China
| | - Hongqi Tian
- a Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine , Chinese Academy of Medical Science & Peking Union Medical College , Tianjin , China
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HPV Status and Its Correlation with BCL2, p21, p53, Rb, and Survivin Expression in Breast Cancer in a Chinese Population. BIOMED RESEARCH INTERNATIONAL 2017; 2017:6315392. [PMID: 29423411 PMCID: PMC5750508 DOI: 10.1155/2017/6315392] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 11/19/2017] [Indexed: 12/13/2022]
Abstract
Despite recent evidence, the role of human papillomavirus (HPV) in breast carcinogenesis is controversial. The correlations of HPV infection with the clinicopathological features of breast cancer and the expression of cell cycle/apoptosis-associated proteins have not been well elucidated. In this study, we sought to determine the prevalence of high-risk HPVs (HR-HPVs) infection and BCL2, p21, p53, Rb, and survivin expression in breast cancer patients and to investigate the relationship of HPV with these cancer-related proteins, in an attempt to clarify the potential mechanism of HPV in breast cancer pathogenesis. HPV presence in 81 fresh breast cancer tissues was determined by hybrid capture 2 (HC2) assay, and expression of BCL2, p21, p53, Rb, and survivin was detected by immunohistochemistry. Here we showed that fourteen (17.3%) patients were HR-HPV positive. HPV infection demonstrated no significant correlation with the clinicopathological characteristics of breast cancer. HPV-positive tumors showed significantly higher BCL2 and lower p53 expression than HPV-negative tumors. Expression of p21, Rb, and survivin was not associated with HPV status. Our results suggest a possible role of HR-HPV in breast cancer carcinogenesis, in which BCL2 and p53 may be involved.
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Cordone I, Masi S, Summa V, Carosi M, Vidiri A, Fabi A, Pasquale A, Conti L, Rosito I, Carapella CM, Villani V, Pace A. Overexpression of syndecan-1, MUC-1, and putative stem cell markers in breast cancer leptomeningeal metastasis: a cerebrospinal fluid flow cytometry study. Breast Cancer Res 2017; 19:46. [PMID: 28399903 PMCID: PMC5387324 DOI: 10.1186/s13058-017-0827-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 03/03/2017] [Indexed: 01/09/2023] Open
Abstract
Background Cancer is a mosaic of tumor cell subpopulations, where only a minority is responsible for disease recurrence and cancer invasiveness. We focused on one of the most aggressive circulating tumor cells (CTCs) which, from the primitive tumor, spreads to the central nervous system (CNS), evaluating the expression of prognostic and putative cancer stem cell markers in breast cancer (BC) leptomeningeal metastasis (LM). Methods Flow cytometry immunophenotypic analysis of cerebrospinal fluid (CSF) samples (4.5 ml) was performed in 13 consecutive cases of BCLM. Syndecan-1 (CD138), MUC-1 (CD227) CD45, CD34, and the putative cancer stem cell markers CD15, CD24, CD44, and CD133 surface expression were evaluated on CSF floating tumor cells. The tumor-associated leukocyte population was also characterized. Results Despite a low absolute cell number (8 cell/μl, range 1–86), the flow cytometry characterization was successfully conducted in all the samples. Syndecan-1 and MUC-1 overexpression was documented on BC cells in all the samples analyzed; CD44, CD24, CD15, and CD133 in 77%, 75%, 70%, and 45% of cases, respectively. A strong syndecan-1 and MUC-1 expression was also documented by immunohistochemistry on primary breast cancer tissues, performed in four patients. The CSF tumor population was flanked by T lymphocytes, with a different immunophenotype between the CSF and peripheral blood samples (P ≤ 0.02). Conclusions Flow cytometry can be successfully employed for solid tumor LM characterization even in CSF samples with low cell count. This in vivo study documents that CSF floating BC cells overexpress prognostic and putative cancer stem cell biomarkers related to tumor invasiveness, potentially representing a molecular target for circulating tumor cell detection and LM treatment monitoring, as well as a primary target for innovative treatment strategies. The T lymphocyte infiltration, documented in all CSF samples, suggests a possible involvement of the CNS lymphatic system in both lymphoid and cancer cell migration into and out of the meninges, supporting the extension of a new form of cellular immunotherapy to LM. Due to the small number of cases, validation on large cohorts of patients are warranted to confirm these findings and to evaluate the impact and value of these results for diagnosis and management of LM. Electronic supplementary material The online version of this article (doi:10.1186/s13058-017-0827-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Iole Cordone
- Regina Elena National Cancer Institute, Clinical Pathology Division, Via Elio Chianesi 53, 00144, Rome, Italy.
| | - Serena Masi
- Regina Elena National Cancer Institute, Clinical Pathology Division, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Valentina Summa
- Regina Elena National Cancer Institute, Clinical Pathology Division, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Mariantonia Carosi
- Regina Elena National Cancer Institute, Histopathology Department, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Antonello Vidiri
- Regina Elena National Cancer Institute, Radiology Department, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Alessandra Fabi
- Regina Elena National Cancer Institute, Medical Oncology Department, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Alessia Pasquale
- Regina Elena National Cancer Institute, Clinical Pathology Division, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Laura Conti
- Regina Elena National Cancer Institute, Clinical Pathology Division, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Immacolata Rosito
- Regina Elena National Cancer Institute, Clinical Pathology Division, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Carmine Maria Carapella
- Regina Elena National Cancer Institute, Neuro-Surgery Department, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Veronica Villani
- Regina Elena National Cancer Institute, Neuro-Oncology Division, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Andrea Pace
- Regina Elena National Cancer Institute, Neuro-Oncology Division, Via Elio Chianesi 53, 00144, Rome, Italy
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Wang YW, Chen X, Gao JW, Zhang H, Ma RR, Gao ZH, Gao P. High expression of cAMP-responsive element-binding protein 1 (CREB1) is associated with metastasis, tumor stage and poor outcome in gastric cancer. Oncotarget 2016; 6:10646-57. [PMID: 25825983 PMCID: PMC4496382 DOI: 10.18632/oncotarget.3392] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 02/17/2015] [Indexed: 11/25/2022] Open
Abstract
cAMP responsive element binding protein 1 (CREB1) has been reported to be implicated in tumor development and progression of human cancers. However, the clinical significance and regulatory mechanisms of CREB1 expression in gastric cancer remain largely unknown. In the present study, immunohistochemistry was performed to detect the expression of CREB1 protein in 185 primary gastric cancer tissues, 50 secondary lymph node metastatic foci and 50 nontumorous gastric tissues. A prognostic model combining CREB1 expression with TNM tumor stage was constructed by logistic regression analysis. Regulation of CREB1 by miRNAs was investigated by luciferase reporter assay and Western blot. It was shown that CREB1 was highly expressed and correlated with lymph node metastasis, distant metastasis and tumor stage and poor outcome in gastric cancer. The prognostic model was proven to be an independent prognosis predictor and performed better than CREB1 or tumor stage alone. CREB1 was identified as a direct target of miR-27b and miR-200b, and down-regulated by miR-27b/miR-200b. We conclude that CREB1 is a promising biomarker to predict tumor metastasis and patient outcome in gastric cancer, and the miR-27b/miR-200b-CREB1 pathway may serve as a potential molecular target for the treatment of gastric cancer.
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Affiliation(s)
- Ya-Wen Wang
- Department of Pathology, School of Medicine, Shandong University, Jinan, P.R. China
| | - Xu Chen
- Department of Pathology, School of Medicine, Shandong University, Jinan, P.R. China
| | - Ji-Wei Gao
- Department of Pathology, School of Medicine, Shandong University, Jinan, P.R. China
| | - Hui Zhang
- Department of Pathology, School of Medicine, Shandong University, Jinan, P.R. China
| | - Ran-Ran Ma
- Department of Pathology, School of Medicine, Shandong University, Jinan, P.R. China
| | - Zu-Hua Gao
- Department of Pathology, School of Medicine, Shandong University, Jinan, P.R. China.,Department of Pathology, McGill University, Montreal, Canada
| | - Peng Gao
- Department of Pathology, School of Medicine, Shandong University, Jinan, P.R. China
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