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Martínez-Galán J, Jiménez-Luna C, Rodriguez I, Maza E, García-Collado C, Rodríguez-Fernández A, López-Hidalgo JL, Caba O. Metastatic pancreatic and lung cancer patient in complete remission following immunotherapy: A case report and review of literature. World J Gastrointest Oncol 2024; 16:2233-2240. [PMID: 38764840 PMCID: PMC11099454 DOI: 10.4251/wjgo.v16.i5.2233] [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: 12/31/2023] [Revised: 02/09/2024] [Accepted: 03/13/2024] [Indexed: 05/09/2024] Open
Abstract
BACKGROUND Metastatic pancreatic ductal adenocarcinoma (PDAC) is a lethal malignancy with dispiriting survival data. Immunotherapy is a promising approach to many cancer types, but achieves poor outcomes in advanced PDAC due to its immunosuppressive tumor microenvironment. We describe a case of metastatic PDAC effectively treated with pembrolizumab. CASE SUMMARY We report the case of a 67-year-old woman with unresectable locally advanced PDAC, treated with gemcitabine plus nab-paclitaxel followed by radiotherapy plus capecitabine. At nine months, pancreatic tumor progression was observed at the level of the hepatic hilum with the appearance of a new pulmonary nodule suggestive of a second primary, confirmed by left lung biopsy. Systemic immunotherapy was then initiated with pembrolizumab, an immune checkpoint inhibitor targeting programmed cell death protein-1 that covers the two tumor types. The patient showed a complete metabolic response that was maintained throughout the treatment. The patient continues to be disease-free at 5.6 years since the start of immunotherapy. CONCLUSION These results suggest that the administration of pembrolizumab after chemoradiotherapy has a beneficial effect in patients with metastatic PDAC. To our knowledge, this is the first reported case of a patient with metastatic PDAC and metastatic lung cancer showing such a long-lasting complete response after pembrolizumab treatment without curative surgery. Further studies are required to determine biomarkers that identify PDAC patients most likely to benefit from this immunotherapy.
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Affiliation(s)
- Joaquina Martínez-Galán
- Department of Medical Oncology, Virgen de las Nieves University Hospital, Granada 18014, Spain
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
| | - Cristina Jiménez-Luna
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
- Institute of Biopathology and Regenerative Medicine (IBIMER), University of Granada, Granada 18016, Spain
| | - Isabel Rodriguez
- Department of Medical Oncology, Virgen de las Nieves University Hospital, Granada 18014, Spain
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
| | - Elisabeth Maza
- Department of Medical Oncology, Virgen de las Nieves University Hospital, Granada 18014, Spain
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
| | - Carlos García-Collado
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
- Pharmacogenetics Unit, Virgen de las Nieves University Hospital, Granada 18014, Spain
| | - Antonio Rodríguez-Fernández
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
- Department of Medicina Nuclear, Virgen de las Nieves University Hospital, Granada 18014, Spain
| | - Javier Luis López-Hidalgo
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
- Department of Anatomía Patológica, Virgen de las Nieves University Hospital, Granada 18014, Spain
| | - Octavio Caba
- Instituto de Investigación Biosanitaria, Ibs. Granada, Granada 18012, Spain
- Institute of Biopathology and Regenerative Medicine (IBIMER), University of Granada, Granada 18016, Spain
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Huang Y, Yan X, Ren T, Yi F, Li Q, Zhang C. The safety and efficacy of chemotherapy combined with immunotherapy for pancreatic cancer: A meta-analysis. Medicine (Baltimore) 2021; 100:e26673. [PMID: 34398033 PMCID: PMC8294910 DOI: 10.1097/md.0000000000026673] [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] [Received: 12/14/2020] [Accepted: 06/17/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Since the combination of chemotherapy and immunotherapy, such as new molecular targeted drugs or vaccines, is controversial in terms of survival advantages compared with chemotherapy therapy alone, we conducted a meta-analysis to compare the efficacy and safety of immunotherapy combined with chemotherapy and chemotherapy alone for advanced pancreatic cancer. METHODS We searched PubMed, Embase, and Cochrane Library from the establishment of the database to November 2020. We included some studies that reported pancreatic cancer patients receiving immunotherapy, and we excluded duplicate publications, research without full text, incomplete information or inability to conduct data extraction, animal experiments, reviews, and systematic reviews. RESULTS The risk ratio of the objective response rate and disease control rate was 1.10 (95% confidence interval [CI]: 0.88-1.38) and 1.17 (95% CI: 1.06-1.31), respectively, indicating that there was no significant difference between the objective response rate of combination therapy and chemotherapy alone, while the disease control rate of the combined treatment was higher than that of chemotherapy alone. The hazard ratio of overall survival and progression-free survival was 0.91 (95% CI: 0.82-1.01) and 0.87 (95% CI: 0.77-0.98), respectively, indicating that there was no significant difference between the overall survival of combination therapy and chemotherapy alone, while progression-free survival of the combined treatment was longer than that of chemotherapy alone. We also found that in addition to the combination treatment, the incidence of vomiting in pancreatic cancer was higher than that of chemotherapy alone, and the incidence of other complications was not significantly different from that of treatment alone. CONCLUSION Chemotherapy combined with immunotherapy for pancreatic cancer not only improves treatment efficiency but also does not cause serious adverse reactions. This treatment strategy should be widely used clinically.
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Xu JW, Wang L, Cheng YG, Zhang GY, Hu SY, Zhou B, Zhan HX. Immunotherapy for pancreatic cancer: A long and hopeful journey. Cancer Lett 2018; 425:143-151. [PMID: 29605510 DOI: 10.1016/j.canlet.2018.03.040] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 02/28/2018] [Accepted: 03/26/2018] [Indexed: 12/11/2022]
Abstract
Multiple therapeutic strategies have been developed to treat pancreatic cancer. However, the outcomes of these approaches are disappointing. Due to deeper understandings of the pivotal roles of the immune system in pancreatic cancer tumorigenesis and progression, novel therapeutic strategies based on immune cells and the tumor microenvironment are being investigated. Some of these approaches, such as checkpoint inhibitors, chimeric antigen receptor T-cell therapy, and BiTE antibodies, have achieved exciting outcomes in preclinical and clinical trials. The current review describes the roles of immune cells and the immunosuppressive microenvironment in the development of pancreatic cancer, as well as the preclinical and clinical outcomes and benefits of recent immunotherapeutic approaches, which may help us further disclose the mechanisms of pancreatic cancer progression and the dialectical views of feasibility and effectiveness of immunotherapy in treatment of pancreatic cancer.
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Affiliation(s)
- Jian-Wei Xu
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, Shandong Province, 250012, China
| | - Lei Wang
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, Shandong Province, 250012, China
| | - Yu-Gang Cheng
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, Shandong Province, 250012, China
| | - Guang-Yong Zhang
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, Shandong Province, 250012, China
| | - San-Yuan Hu
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, Shandong Province, 250012, China
| | - Bin Zhou
- Department of Hepatopancreatobiliary Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, 266003, China.
| | - Han-Xiang Zhan
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, Shandong Province, 250012, China.
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Abstract
Pancreatic cancer is among the three deadliest cancers worldwide with the lowest 5-year survival of all cancers. Despite all efforts, therapeutic improvements have barely been made over the last decade. Even recent highly promising targeted and immunotherapeutic approaches did not live up to their expectations. Therefore, other horizons have to be explored. Natural Killer (NK) cells are gaining more and more interest as a highly attractive target for cancer immunotherapies, both as pharmaceutical target and for cell therapies. In this systematic review we summarise the pathophysiological adaptions of NK cells in pancreatic cancer and highlight possible (future) therapeutic NK cell-related targets. Furthermore, an extensive overview of recent therapeutic approaches with an effect on NK cells is given, including cytokine-based, viro- and bacteriotherapy and cell therapy. We also discuss ongoing clinical trials that might influence NK cells. In conclusion, although several issues regarding NK cells in pancreatic cancer remain unsolved and need further investigation, extensive evidence is already provided that support NK cell oriented approaches in pancreatic cancer.
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Nishida S, Ishikawa T, Egawa S, Koido S, Yanagimoto H, Ishii J, Kanno Y, Kokura S, Yasuda H, Oba MS, Sato M, Morimoto S, Fujiki F, Eguchi H, Nagano H, Kumanogoh A, Unno M, Kon M, Shimada H, Ito K, Homma S, Oka Y, Morita S, Sugiyama H. Combination Gemcitabine and WT1 Peptide Vaccination Improves Progression-Free Survival in Advanced Pancreatic Ductal Adenocarcinoma: A Phase II Randomized Study. Cancer Immunol Res 2018; 6:320-331. [PMID: 29358173 DOI: 10.1158/2326-6066.cir-17-0386] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 10/17/2017] [Accepted: 01/09/2018] [Indexed: 11/16/2022]
Abstract
We investigated the efficacy of a Wilms' tumor gene 1 (WT1) vaccine combined with gemcitabine (GEMWT1) and compared it with gemcitabine (GEM) monotherapy for advanced pancreatic ductal adenocarcinoma (PDAC) in a randomized phase II study. We randomly assigned HLA-A*02:01- or HLA-A*24:02-positive patients with advanced PDAC to receive GEMWT1 or GEM. We assessed WT1-specific immune responses via delayed-type hypersensitivity (DTH) to the WT1 peptide and a tetramer assay to detect WT1-specific cytotoxic T lymphocytes (WT1-CTL). Of 91 patients enrolled, 85 were evaluable (GEMWT1: n = 42; GEM: n = 43). GEMWT1 prolonged progression-free survival [PFS; hazard ratio (HR), 0.66; P = 0.084] and improved overall survival rate at 1 year (1-year OS%; GEMWT1: 35.7%; GEM: 20.9%). However, the difference in OS was not significant (HR: 0.82; P = 0.363). These effects were particularly evident in metastatic PDAC (PFS: HR 0.51, P = 0.0017; 1-year OS%: GEMWT1 27.3%; GEM 11.8%). The combination was well tolerated, with no unexpected serious adverse events. In patients with metastatic PDAC, PFS in the DTH-positive GEMWT1 group was significantly prolonged, with a better HR of 0.27 compared with the GEM group, whereas PFS in the DTH-negative GEMWT1 group was similar to that in the GEM group (HR 0.86; P = 0.001). DTH positivity was associated with an increase in WT1-CTLs induced by the WT1 vaccine. GEM plus the WT1 vaccine prolonged PFS and may improve 1-year OS% in advanced PDAC. These clinical effects were associated with the induction of WT1-specific immune responses. Cancer Immunol Res; 6(3); 320-31. ©2018 AACR.
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Affiliation(s)
- Sumiyuki Nishida
- Department of Respiratory Medicine and Clinical Immunology, Osaka University Graduate School of Medicine, Osaka, Japan.
| | - Takeshi Ishikawa
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Shinichi Egawa
- Division of International Cooperation for Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
| | - Shigeo Koido
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | | | - Jun Ishii
- Division of General and Gastroenterological Surgery, Department of Surgery, Toho University Faculty of Medicine, Tokyo, Japan
| | - Yoshihide Kanno
- Department of Gastroenterology, Sendai City Medical Center, Sendai, Japan
| | - Satoshi Kokura
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroaki Yasuda
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Mari Saito Oba
- Department of Biostatistics, Yokohama City University, Yokohama, Japan
| | - Maho Sato
- Department of Biostatistics, Yokohama City University, Yokohama, Japan
| | - Soyoko Morimoto
- Department of Cancer Immunotherapy, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Fumihiro Fujiki
- Department of Cancer Immunology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroaki Nagano
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Atsushi Kumanogoh
- Department of Respiratory Medicine and Clinical Immunology, Osaka University Graduate School of Medicine, Osaka, Japan.,Department of Immunopathology, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masanori Kon
- Department of Surgery, Kansai Medical University, Hirakata, Japan
| | - Hideaki Shimada
- Division of General and Gastroenterological Surgery, Department of Surgery, Toho University Faculty of Medicine, Tokyo, Japan
| | - Kei Ito
- Department of Gastroenterology, Sendai City Medical Center, Sendai, Japan
| | - Sadamu Homma
- Division of Oncology, Research Center for Medical Science, The Jikei University School of Medicine, Tokyo, Japan
| | - Yoshihiro Oka
- Department of Immunopathology, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Department of Cancer Stem Cell Biology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Satoshi Morita
- Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Haruo Sugiyama
- Department of Cancer Immunology, Osaka University Graduate School of Medicine, Osaka, Japan
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Cha SW, Bonissone S, Na S, Pevzner PA, Bafna V. The Antibody Repertoire of Colorectal Cancer. Mol Cell Proteomics 2017; 16:2111-2124. [PMID: 29046389 PMCID: PMC5724175 DOI: 10.1074/mcp.ra117.000397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Indexed: 12/31/2022] Open
Abstract
Immunotherapy is becoming increasingly important in the fight against cancers, using and manipulating the body's immune response to treat tumors. Understanding the immune repertoire-the collection of immunological proteins-of treated and untreated cells is possible at the genomic, but technically difficult at the protein level. Standard protein databases do not include the highly divergent sequences of somatic rearranged immunoglobulin genes, and may lead to miss identifications in a mass spectrometry search. We introduce a novel proteogenomic approach, AbScan, to identify these highly variable antibody peptides, by developing a customized antibody database construction method using RNA-seq reads aligned to immunoglobulin (Ig) genes.AbScan starts by filtering transcript (RNA-seq) reads that match the template for Ig genes. The retained reads are used to construct a repertoire graph using the "split" de Bruijn graph: a graph structure that improves on the standard de Bruijn graph to capture the high diversity of Ig genes in a compact manner. AbScan corrects for sequencing errors, and converts the graph to a format suitable for searching with MS/MS search tools. We used AbScan to create an antibody database from 90 RNA-seq colorectal tumor samples. Next, we used proteogenomic analysis to search MS/MS spectra of matched colorectal samples from the Clinical Proteomic Tumor Analysis Consortium (CPTAC) against the AbScan generated database. AbScan identified 1,940 distinct antibody peptides. Correlating with previously identified Single Amino-Acid Variants (SAAVs) in the tumor samples, we identified 163 pairs (antibody peptide, SAAV) with significant cooccurrence pattern in the 90 samples. The presence of coexpressed antibody and mutated peptides was correlated with survival time of the individuals. Our results suggest that AbScan (https://github.com/csw407/AbScan.git) is an effective tool for a proteomic exploration of the immune response in cancers.
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Affiliation(s)
- Seong Won Cha
- From the ‡Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California
| | | | - Seungjin Na
- ¶Department of Computer Science and Engineering, University of California, San Diego, La Jolla, California 92037
| | - Pavel A Pevzner
- ¶Department of Computer Science and Engineering, University of California, San Diego, La Jolla, California 92037
| | - Vineet Bafna
- ¶Department of Computer Science and Engineering, University of California, San Diego, La Jolla, California 92037
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7
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Immunotherapy as an Option for Cancer Treatment. Arch Immunol Ther Exp (Warsz) 2017; 66:89-96. [PMID: 29026920 DOI: 10.1007/s00005-017-0491-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 08/25/2017] [Indexed: 12/16/2022]
Abstract
The progress in melanoma immunotherapy highlights the importance of immunotherapy for cancer treatment. Although the concept of immunotherapy emerged in the beginning of the twentieth century, the end of the century signaled the start of modern immunotherapy, which has recently allowed a staggering progress in the field of cancer immunotherapy. Currently, there is a wide variety of immunotherapeutic approaches and critical improvements are continually being made. Among different immunotherapeutic strategies, therapies based on the blockade of immune checkpoint molecules have shown unparalleled efficacy in late-stage cancer patients. Pre-clinical research using ex vivo and in vivo approaches demonstrates the promise of numerous novel strategies for the immunotherapy of cancer.
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8
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Van Audenaerde JRM, De Waele J, Marcq E, Van Loenhout J, Lion E, Van den Bergh JMJ, Jesenofsky R, Masamune A, Roeyen G, Pauwels P, Lardon F, Peeters M, Smits ELJ. Interleukin-15 stimulates natural killer cell-mediated killing of both human pancreatic cancer and stellate cells. Oncotarget 2017; 8:56968-56979. [PMID: 28915646 PMCID: PMC5593617 DOI: 10.18632/oncotarget.18185] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 04/14/2017] [Indexed: 12/12/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is the 4th leading cause of cancer-related death in Western countries with a 5-year survival rate below 5%. One of the hallmarks of this cancer is the strong desmoplastic reaction within the tumor microenvironment (TME), orchestrated by activated pancreatic stellate cells (PSC). This results in a functional and mechanical shield which causes resistance to conventional therapies. Aiming to overcome this resistance by tackling the stromal shield, we assessed for the first time the capacity of IL-15 stimulated natural killer (NK) cells to kill PSC and pancreatic cancer cells (PCC). The potency of IL-15 to promote NK cell-mediated killing was evaluated phenotypically and functionally. In addition, NK cell and immune checkpoint ligands on PSC were charted. We demonstrate that IL-15 activated NK cells kill both PCC and PSC lines (range 9-35% and 20-50%, respectively) in a contact-dependent manner and significantly higher as compared to resting NK cells. Improved killing of these pancreatic cell lines is, at least partly, dependent on IL-15 induced upregulation of TIM-3 and NKG2D. Furthermore, we confirm significant killing of primary PSC by IL-15 activated NK cells in an ex vivo autologous system. Screening for potential targets for immunotherapeutic strategies, we demonstrate surface expression of both inhibitory (PD-L1, PD-L2) and activating (MICA/B, ULBPs and Galectin-9) ligands on primary PSC. These data underscore the therapeutic potential of IL-15 to promote NK cell-mediated cytotoxicity as a treatment of pancreatic cancer and provide promising future targets to tackle remaining PSC.
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Affiliation(s)
- Jonas R M Van Audenaerde
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Jorrit De Waele
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Elly Marcq
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Jinthe Van Loenhout
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Eva Lion
- Laboratory of Experimental Hematology, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Johan M J Van den Bergh
- Laboratory of Experimental Hematology, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Ralf Jesenofsky
- Department of Medicine II, Medical Faculty of Mannheim, University of Heidelberg, Mannheim, Germany
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Geert Roeyen
- Department of Hepatobiliary, Endocrine and Transplantation Surgery, Antwerp University Hospital, Antwerp, Belgium
| | - Patrick Pauwels
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Pathology, Antwerp University Hospital, Antwerp, Belgium
| | - Filip Lardon
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Marc Peeters
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Oncology, Multidisciplinary Oncological Centre Antwerp, Antwerp University Hospital, Antwerp, Belgium
| | - Evelien L J Smits
- Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Laboratory of Experimental Hematology, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
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Clinical Outcomes of Specific Immunotherapy in Advanced Pancreatic Cancer: A Systematic Review and Meta-Analysis. J Immunol Res 2017; 2017:8282391. [PMID: 28265583 PMCID: PMC5318641 DOI: 10.1155/2017/8282391] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/15/2016] [Indexed: 02/08/2023] Open
Abstract
Specific immunotherapies, including vaccines with autologous tumor cells and tumor antigen-specific monoclonal antibodies, are important treatments for PC patients. To evaluate the clinical outcomes of PC-specific immunotherapy, we performed a systematic review and meta-analysis of the relevant published clinical trials. The effects of specific immunotherapy were compared with those of nonspecific immunotherapy and the meta-analysis was executed with results regarding the overall survival (OS), immune responses data, and serum cancer markers data. The pooled analysis was performed by using the random-effects model. We found that significantly improved OS was noted for PC patients utilizing specific immunotherapy and an improved immune response was also observed. In conclusion, specific immunotherapy was superior in prolonging the survival time and enhancing immunological responses in PC patients.
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