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Ibrahim AA, Fujimura T, Uno T, Terada T, Hirano KI, Hosokawa H, Ohta A, Miyata T, Ando K, Yahata T. Plasminogen activator inhibitor-1 promotes immune evasion in tumors by facilitating the expression of programmed cell death-ligand 1. Front Immunol 2024; 15:1365894. [PMID: 38779680 PMCID: PMC11109370 DOI: 10.3389/fimmu.2024.1365894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 04/23/2024] [Indexed: 05/25/2024] Open
Abstract
Background Increased levels of plasminogen activator inhibitor-1 (PAI-1) in tumors have been found to correlate with poor clinical outcomes in patients with cancer. Although abundant data support the involvement of PAI-1 in cancer progression, whether PAI-1 contributes to tumor immune surveillance remains unclear. The purposes of this study are to determine whether PAI-1 regulates the expression of immune checkpoint molecules to suppresses the immune response to cancer and demonstrate the potential of PAI-1 inhibition for cancer therapy. Methods The effects of PAI-1 on the expression of the immune checkpoint molecule programmed cell death ligand 1 (PD-L1) were investigated in several human and murine tumor cell lines. In addition, we generated tumor-bearing mice and evaluated the effects of a PAI-1 inhibitor on tumor progression or on the tumor infiltration of cells involved in tumor immunity either alone or in combination with immune checkpoint inhibitors. Results PAI-1 induces PD-L1 expression through the JAK/STAT signaling pathway in several types of tumor cells and surrounding cells. Blockade of PAI-1 impedes PD-L1 induction in tumor cells, significantly reducing the abundance of immunosuppressive cells at the tumor site and increasing cytotoxic T-cell infiltration, ultimately leading to tumor regression. The anti-tumor effect elicited by the PAI-1 inhibitor is abolished in immunodeficient mice, suggesting that PAI-1 blockade induces tumor regression by stimulating the immune system. Moreover, combining a PAI-1 inhibitor with an immune checkpoint inhibitor significantly increases tumor regression. Conclusions PAI-1 protects tumors from immune surveillance by increasing PD-L1 expression; hence, therapeutic PAI-1 blockade may prove valuable in treating malignant tumors.
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Affiliation(s)
- Abd Aziz Ibrahim
- Translational Molecular Therapeutics Laboratory, Division of Host Defense Mechanism, Tokai University School of Medicine, Kanagawa, Japan
| | - Taku Fujimura
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomoko Uno
- Department of Hematology and Oncology, Tokai University School of Medicine, Kanagawa, Japan
| | - Tomoya Terada
- Translational Molecular Therapeutics Laboratory, Division of Host Defense Mechanism, Tokai University School of Medicine, Kanagawa, Japan
| | - Ken-ichi Hirano
- Department of Immunology, Tokai University School of Medicine, Kanagawa, Japan
| | - Hiroyuki Hosokawa
- Department of Immunology, Tokai University School of Medicine, Kanagawa, Japan
| | - Akio Ohta
- Department of Immunology, Institute of Biomedical Research and Innovation, Foundation for Biomedical Research and Innovation at Kobe, Kobe, Japan
| | - Toshio Miyata
- Department of Molecular Medicine and Therapy, United Centers for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Kiyoshi Ando
- Department of Hematology and Oncology, Tokai University School of Medicine, Kanagawa, Japan
| | - Takashi Yahata
- Translational Molecular Therapeutics Laboratory, Division of Host Defense Mechanism, Tokai University School of Medicine, Kanagawa, Japan
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Seo CJ, Tan JWS, Farid M, Wong JSM, Soo KC, Chia CS, Ong CAJ. Radical resection and hyperthermic intraperitoneal chemotherapy (HIPEC) in the treatment of high risk recurrent retroperitoneal sarcoma-A pilot study in a tertiary Asian centre. PLoS One 2024; 19:e0300594. [PMID: 38574044 PMCID: PMC10994346 DOI: 10.1371/journal.pone.0300594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 02/23/2024] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND Peritoneal sarcomatosis (PS) is a difficult entity to treat with limited options and guarded prognosis. We aimed to determine if the addition of hyperthermic intraperitoneal chemotherapy (HIPEC) could offer superior local recurrence-free survival in patients with retroperitoneal sarcoma at high risk of developing PS as opposed to extended resection alone. METHODS This is a single arm, phase II intervention study where all patients with recurrent localized retroperitoneal sarcoma considered at high risk of developing PS were considered for enrolment (ClinicalTrials.gov identifier: NCT03792867). Upon enrolment, patients underwent vigorous preoperative testing to ensure fitness for the procedure. During surgery, patients underwent extended resection and HIPEC with doxorubicin. Patients were followed-up every 2 weeks (± 10 days) for the first month and subsequently every three months (± 1 month) up to a year post-surgery, and were assessed for potential chemotherapy toxicity and post-treatment complications. After a year from resection and HIPEC, patients were followed-up either during routine clinic review or contacted via telephone every year (± 1 month) for 3 years. RESULTS Six patients were recruited but one patient dropped out due to adverse and unexpected intraoperative events. The remaining patients completed the procedure uneventfully. Post-HIPEC, all patients recurred with a disease-free interval ranging from six to 24 months. Three patients died due to complications from recurrent disease whereas the remaining three patients are alive as of their last visit. The overall survival at time at reporting ranged between 22 to 56 months. CONCLUSION The procedure is feasible with no major morbidity to patients. However, we are unable to recommend for it to be implemented as a routine procedure at this current stage due to lack of improved survival outcomes. Further multi-institutional studies may be conducted to yield better results.
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Affiliation(s)
- Chin Jin Seo
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
| | - Joey Wee-Shan Tan
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Laboratory of Applied Human Genetics, Division of Medical Sciences, National Cancer Centre Singapore, Singapore, Singapore
| | - Mohamad Farid
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- SingHealth Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
| | - Jolene Si Min Wong
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- SingHealth Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- SingHealth Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
| | - Khee Chee Soo
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
| | - Claramae Shulyn Chia
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- SingHealth Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- SingHealth Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
| | - Chin-Ann Johnny Ong
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Laboratory of Applied Human Genetics, Division of Medical Sciences, National Cancer Centre Singapore, Singapore, Singapore
- SingHealth Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- SingHealth Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- Institute of Molecular and Cell Biology, A*STAR Research Entities, Singapore, Singapore
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Chia CS, Li Y, Ceelen W, Ong CAJ. Editorial: Translational research in the diagnosis and development of therapeutics for peritoneal surface malignancies. Front Oncol 2023; 13:1232993. [PMID: 37496663 PMCID: PMC10366001 DOI: 10.3389/fonc.2023.1232993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 06/26/2023] [Indexed: 07/28/2023] Open
Affiliation(s)
- Claramae Shulyn Chia
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- SingHealth Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- SingHealth Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
| | - Yan Li
- Department of Peritoneal Cancer Surgery and Pathology, Beijing Tsinghua Changgung Hospital, Beijing, China
| | - Wim Ceelen
- Department of Gastrointestinal Surgery, Ghent University Hospital, Ghent, Belgium
| | - Chin-Ann Johnny Ong
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- SingHealth Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- SingHealth Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- Laboratory of Applied Human Genetics, Division of Medical Sciences, National Cancer Centre Singapore, Singapore, Singapore
- Institute of Molecular and Cell Biology, ASTAR Research Entities, Singapore, Singapore
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Bootsma S, Bijlsma MF, Vermeulen L. The molecular biology of peritoneal metastatic disease. EMBO Mol Med 2023; 15:e15914. [PMID: 36700339 PMCID: PMC9994485 DOI: 10.15252/emmm.202215914] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/07/2022] [Accepted: 12/09/2022] [Indexed: 01/27/2023] Open
Abstract
Peritoneal metastases are a common form of tumor cell dissemination in gastrointestinal malignancies. Peritoneal metastatic disease (PMD) is associated with severe morbidity and resistance to currently employed therapies. Given the distinct route of dissemination compared with distant organ metastases, and the unique microenvironment of the peritoneal cavity, specific tumor cell characteristics are needed for the development of PMD. In this review, we provide an overview of the known histopathological, genomic, and transcriptomic features of PMD. We find that cancers representing the mesenchymal subtype are strongly associated with PMD in various malignancies. Furthermore, we discuss the peritoneal niche in which the metastatic cancer cells reside, including the critical role of the peritoneal immune system. Altogether, we show that PMD should be regarded as a distinct disease entity, that requires tailored treatment strategies.
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Affiliation(s)
- Sanne Bootsma
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental and Molecular MedicineAmsterdam UMC, Location University of AmsterdamAmsterdamThe Netherlands
- Cancer Center Amsterdam, Cancer BiologyAmsterdamThe Netherlands
- Amsterdam Gastroenterology Endocrinology MetabolismAmsterdamThe Netherlands
- Oncode InstituteAmsterdamThe Netherlands
| | - Maarten F Bijlsma
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental and Molecular MedicineAmsterdam UMC, Location University of AmsterdamAmsterdamThe Netherlands
- Cancer Center Amsterdam, Cancer BiologyAmsterdamThe Netherlands
- Amsterdam Gastroenterology Endocrinology MetabolismAmsterdamThe Netherlands
- Oncode InstituteAmsterdamThe Netherlands
| | - Louis Vermeulen
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental and Molecular MedicineAmsterdam UMC, Location University of AmsterdamAmsterdamThe Netherlands
- Cancer Center Amsterdam, Cancer BiologyAmsterdamThe Netherlands
- Amsterdam Gastroenterology Endocrinology MetabolismAmsterdamThe Netherlands
- Oncode InstituteAmsterdamThe Netherlands
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Han S, Chok AY, Peh DYY, Ho JZM, Tan EKW, Koo SL, Tan IBH, Ong JCA. The distinct clinical trajectory, metastatic sites, and immunobiology of microsatellite-instability-high cancers. Front Genet 2022; 13:933475. [DOI: 10.3389/fgene.2022.933475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 10/17/2022] [Indexed: 12/03/2022] Open
Abstract
Microsatellite-instability-high (MSI-H) cancers form a spectrum of solid organ tumors collectively known as Lynch Syndrome cancers, occurring not only in a subset of colorectal, endometrial, small bowel, gastric, pancreatic, and biliary tract cancers but also in prostate, breast, bladder, and thyroid cancers. Patients with Lynch Syndrome harbor germline mutations in mismatch repair genes, with a high degree of genomic instability, leading to somatic hypermutations and, therefore, oncogenesis and cancer progression. MSI-H cancers have unique clinicopathological characteristics compared to their microsatellite-stable (MSS) counterparts, marked by a higher neoantigen load, immune cell infiltration, and a marked clinical response to immune checkpoint blockade. Patients with known Lynch Syndrome may be detected early through surveillance, but some patients present with disseminated metastatic disease. The treatment landscape of MSI-H cancers, especially colorectal cancers, has undergone a paradigm shift and remains to be defined, with immune checkpoint blockade coming to the forefront of treatment strategies in the stage IV setting. We summarize in this review the clinical features of MSI-H cancers with a specific interest in the pattern of spread or recurrence, disease trajectory, and treatment strategies. We also summarize the tumor-immune landscape and genomic profile of MSI-H cancers and potential novel therapeutic strategies.
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Lau MC, Yi Y, Goh D, Cheung CCL, Tan B, Lim JCT, Joseph CR, Wee F, Lee JN, Lim X, Lim CJ, Leow WQ, Lee JY, Ng CCY, Bashiri H, Cheow PC, Chan CY, Koh YX, Tan TT, Kalimuddin S, Tai WMD, Ng JL, Low JGH, Lim TKH, Liu J, Yeong JPS. Case report: Understanding the impact of persistent tissue-localization of SARS-CoV-2 on immune response activity via spatial transcriptomic analysis of two cancer patients with COVID-19 co-morbidity. Front Immunol 2022; 13:978760. [PMID: 36172383 PMCID: PMC9510984 DOI: 10.3389/fimmu.2022.978760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 08/26/2022] [Indexed: 11/13/2022] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has infected half a billion people, including vulnerable populations such as cancer patients. While increasing evidence supports the persistence of SARS-CoV-2 months after a negative nasopharyngeal swab test, the effects on long-term immune memory and cancer treatment are unclear. In this report, we examined post-COVID-19 tissue-localized immune responses in a hepatocellular carcinoma (HCC) patient and a colorectal cancer (CRC) patient. Using spatial whole-transcriptomic analysis, we demonstrated spatial profiles consistent with a lymphocyte-associated SARS-CoV-2 response (based on two public COVID-19 gene sets) in the tumors and adjacent normal tissues, despite intra-tumor heterogeneity. The use of RNAscope and multiplex immunohistochemistry revealed that the spatial localization of B cells was significantly associated with lymphocyte-associated SARS-CoV-2 responses within the spatial transcriptomic (ST) niches showing the highest levels of virus. Furthermore, single-cell RNA sequencing data obtained from previous (CRC) or new (HCC) ex vivo stimulation experiments showed that patient-specific SARS-CoV-2 memory B cells were the main contributors to this positive association. Finally, we evaluated the spatial associations between SARS-CoV-2-induced immunological effects and immunotherapy-related anti-tumor immune responses. Immuno-predictive scores (IMPRES) revealed consistent positive spatial correlations between T cells/cytotoxic lymphocytes and the predicted immune checkpoint blockade (ICB) response, particularly in the HCC tissues. However, the positive spatial correlation between B cells and IMPRES score was restricted to the high-virus ST niche. In addition, tumor immune dysfunction and exclusion (TIDE) analysis revealed marked T cell dysfunction and inflammation, alongside low T cell exclusion and M2 tumor-associated macrophage infiltration. Our results provide in situ evidence of SARS-CoV-2-generated persistent immunological memory, which could not only provide tissue protection against reinfection but may also modulate the tumor microenvironment, favoring ICB responsiveness. As the number of cancer patients with COVID-19 comorbidity continues to rise, improved understanding of the long-term immune response induced by SARS-CoV-2 and its impact on cancer treatment is much needed.
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Affiliation(s)
- Mai Chan Lau
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Yang Yi
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore, Singapore
| | - Denise Goh
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Chun Chau Lawrence Cheung
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore, Singapore
- Department of Anatomical Pathology, Singapore General Hospital, Singapore, Singapore
| | - Benedict Tan
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Jeffrey Chun Tatt Lim
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Craig Ryan Joseph
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Felicia Wee
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Justina Nadia Lee
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Xinru Lim
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Chun Jye Lim
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Wei Qiang Leow
- Department of Anatomical Pathology, Singapore General Hospital, Singapore, Singapore
| | - Jing Yi Lee
- Department of Infectious Diseases, Singapore General Hospital, Singapore, Singapore
| | | | - Hamed Bashiri
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Peng Chung Cheow
- Cancer Discovery Hub, National Cancer Centre Singapore, Singapore, Singapore
| | - Chun Yip Chan
- Cancer Discovery Hub, National Cancer Centre Singapore, Singapore, Singapore
| | - Ye Xin Koh
- Cancer Discovery Hub, National Cancer Centre Singapore, Singapore, Singapore
| | - Thuan Tong Tan
- Department of Hepatopancreatobiliary and Transplant Surgery, Singapore General Hospital, Singapore, Singapore
| | - Shirin Kalimuddin
- Department of Anatomical Pathology, Singapore General Hospital, Singapore, Singapore
- Department of Hepatopancreatobiliary and Transplant Surgery, Singapore General Hospital, Singapore, Singapore
| | - Wai Meng David Tai
- National Cancer Centre Singapore, Division of Medical Oncology, Singapore, Singapore
| | - Jia Lin Ng
- Department of Colorectal Surgery, Singapore General Hospital, Singapore, Singapore
| | - Jenny Guek-Hong Low
- Department of Anatomical Pathology, Singapore General Hospital, Singapore, Singapore
- Department of Hepatopancreatobiliary and Transplant Surgery, Singapore General Hospital, Singapore, Singapore
| | - Tony Kiat Hon Lim
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore, Singapore
- Department of Anatomical Pathology, Singapore General Hospital, Singapore, Singapore
- *Correspondence: Joe Poh Sheng Yeong, ; Jin Liu, ; Tony Kiat Hon Lim,
| | - Jin Liu
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore, Singapore
- *Correspondence: Joe Poh Sheng Yeong, ; Jin Liu, ; Tony Kiat Hon Lim,
| | - Joe Poh Sheng Yeong
- Institute of Molecular and Cell Biology (IMCB), Agency of Science, Technology and Research (A*STAR), Singapore, Singapore
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore, Singapore
- Department of Anatomical Pathology, Singapore General Hospital, Singapore, Singapore
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
- *Correspondence: Joe Poh Sheng Yeong, ; Jin Liu, ; Tony Kiat Hon Lim,
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Generating patient-derived ascites-dependent xenograft mouse models of peritoneal carcinomatosis. STAR Protoc 2022; 3:101548. [PMID: 35842864 PMCID: PMC9294250 DOI: 10.1016/j.xpro.2022.101548] [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: 03/23/2022] [Revised: 05/26/2022] [Accepted: 06/17/2022] [Indexed: 11/24/2022] Open
Abstract
Clinically relevant animal models are crucial for effective development of therapeutics for peritoneal carcinomatosis (PC). This protocol describes the generation of patient-derived ascites-dependent xenograft (PDADX) models from the cellular component of ascites. The use of routine intraperitoneal injection of the fluid component of ascites is analogous to the biological events occurring intra-abdominally in patients with PC. By serving as a proxy, PDADX models represent a valuable tool for preclinical testing of new therapeutics for PC. For complete details on the use and execution of this protocol, please refer to Hendrikson et al. (2022). Generation of patient-derived ascites-dependent xenograft (PDADX) models Serial passages of PDADX tumors in mice Evaluation of patient-specific drug efficacy utilizing PDADX models
Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics.
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