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Yahiro I, Sato O, Mohapatra S, Mukai K, Toyoda A, Itoh T, Matsuyama M, Chakraborty T, Ohta K. SDF-1/CXCR4 signal is involved in the induction of Primordial Germ Cell migration in a model marine fish, Japanese anchovy (Engraulis japonicus). Gen Comp Endocrinol 2024; 351:114476. [PMID: 38408712 DOI: 10.1016/j.ygcen.2024.114476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 02/16/2024] [Accepted: 02/19/2024] [Indexed: 02/28/2024]
Abstract
Primordial germ cells (PGCs) are pivotal for gonadal development and reproductive success. Though artificial induction of sterility by targeting PGCs are gaining popularity due to its advantages in fish surrogacy and biodiversity management, it is often skill and time intensive. In this study, we have focused on understanding the role of PGCs and the chemotactic SDF-1/CXCR4 signaling on gonad development of Japanese anchovy (JA, Engraulis japonicus), an upcoming marine model organism with eco-commercial values, with an aim to develop a novel, easy, and versatile gonad sterilization method. Our data showed that PGC migration related genes, i.e., sdf-1a, sdf-1b, cxcr4a, cxcr4b and vasa, are phylogenetically closer relatives of respective herring (Clupea harengus) and zebrafish (Danio rerio) homolog. Subsequently, PGC marking and live tracing experiments confirmed that PGC migration in JA initiates from 16 hours post fertilization (hpf) followed by PGC settlement in the gonadal ridge at 44 hpf. We found that overexpression of zebrafish sdf-1a mRNA in the germ cell suppresses cxcr4a and increases cxcr4b transcription at 8 hpf, dose dependently disrupts PGC migration at 24-48 hpf, induces PGC death and upregulates sdf-1b at 5 days post hatching. 48 h of immersion treatment with CXCR4 antagonist (AMD3100, Abcam) also accelerated PGC mismigration and pushed the PGC away from gonadal ridge in a dose responsive manner, and further when grown to adulthood caused germ cell less gonad formation in some individuals. Cumulatively, our data, for the first time, suggests that JA PGC migration is largely regulated by SDF1/CXCR4 signaling, and modulation of this signaling has strong potential for sterile, germ cell less gonad preparation at a mass scale. However, further in-depth analysis is pertinent to apply this methodology in marine fish species to successfully catapult Japanese anchovy into a true marine fish model.
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Affiliation(s)
- Issei Yahiro
- Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Oga Sato
- Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Sipra Mohapatra
- Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan; Aqua-Bioresource Innovation Center, Kyushu University, Saga 847-8511, Japan
| | - Koki Mukai
- Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan; Fisheries Technology Institute, Japan Fisheries Research and Education Agency, Nagasaki 853-0508, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Shizuoka 411-8540, Japan
| | - Takehiko Itoh
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo 152-8550, Japan
| | - Michiya Matsuyama
- Aqua-Bioresource Innovation Center, Kyushu University, Saga 847-8511, Japan
| | - Tapas Chakraborty
- Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan; Aqua-Bioresource Innovation Center, Kyushu University, Saga 847-8511, Japan.
| | - Kohei Ohta
- Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan; Aqua-Bioresource Innovation Center, Kyushu University, Saga 847-8511, Japan.
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Sagini MN, Zepp M, Eyol E, Ali DM, Gromova S, Dahlmann M, Behrens D, Groeschel C, Tischmeier L, Hoffmann J, Berger MR, Forssmann WG. EPI-X4, a CXCR4 antagonist inhibits tumor growth in pancreatic cancer and lymphoma models. Peptides 2024; 175:171111. [PMID: 38036098 DOI: 10.1016/j.peptides.2023.171111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/20/2023] [Accepted: 10/25/2023] [Indexed: 12/02/2023]
Abstract
Endogenous peptide inhibitor for CXCR4 (EPI-X4) is a CXCR4 antagonist with potential for cancer therapy. It is a processed fragment of serum albumin from the hemofiltrate of dialysis patients. This study reports the efficacy of fifteen EPI-X4 derivatives in pancreatic cancer and lymphoma models. In vitro, the peptides were investigated for antiproliferation (cytotoxicity) by MTT assay. The mRNA expression for CXCR4 and CXCL12 was determined by RT-PCR, chip array and RNA sequencing. Chip array analysis yielded 634 genes associated with CXCR4/CXCL12 signaling. About 21% of these genes correlated with metastasis in the context of cell motility, proliferation, and survival. Expression levels of these genes were altered in pancreatic cancer (36%), lymphoma models (53%) and in patients' data (58%). EPI-X4 derivatives failed to inhibit cell proliferation due to low expression of CXCR4 in vitro, but inhibited tumor growth in the bioassays with significant efficacy. In the pancreatic cancer model, EPI-X4a, f and k inhibited mean tumor growth by > 50% and even caused complete remissions. In the lymphoma model, EPI-X4b, n and p inhibited mean tumor growth by > 70% and caused stable disease. Given the non-toxic and non-immunogenic properties of EPI-X4, these findings underscore its status as a promising therapy of pancreatic cancer and lymphoma and warrant further studies. SIMPLE SUMMARY: This study examined the value of chemokine receptor CXCR4 as an antineoplastic target for the endogenous peptide inhibitor of CXCR4 (EPI-X4), a 12-meric peptide derived from serum albumin. EPI-X4 inhibits CXCR4 interaction with its natural ligand, CXCL12 (SDF1). Therefore, malignancies (including pancreatic cancer and lymphoma) that depend on the CXCR4/CXCL12 pathway for progression can be targeted with EPI-X4. Of 634 genes that were linked to the CXCR4/CXCL12 pathway, 21% were associated with metastasis. In cultured human Suit2-007 pancreatic cancer cells, CXCR4 showed low to undetectable expression, which was why EPI-X4 did not inhibit pancreatic cancer cell proliferation. These findings were different in vivo, where CXCR4 was highly expressed and EPI-X4 inhibited tumor growth in rodents harboring pancreatic cancer or lymphoma. In the pancreatic cancer model, EPI-X4 derivatives a, f and k caused complete remissions, while in lymphomas EPI-X4 derivatives b, n and p caused stable disease.
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Affiliation(s)
- Micah N Sagini
- Toxicology and Chemotherapy Unit, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Michael Zepp
- Toxicology and Chemotherapy Unit, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Ergül Eyol
- Toxicology and Chemotherapy Unit, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Doaa M Ali
- Toxicology and Chemotherapy Unit, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Svetlana Gromova
- EPO, Experimental Pharmacology & Oncology Berlin-Buch GmbH, Germany
| | - Mathias Dahlmann
- EPO, Experimental Pharmacology & Oncology Berlin-Buch GmbH, Germany
| | - Diana Behrens
- EPO, Experimental Pharmacology & Oncology Berlin-Buch GmbH, Germany
| | - Christian Groeschel
- NeoPep Pharma GmbH & Co. KG., Hannover, Germany and Hannover Medical School, Department of Internal Medicine, Germany
| | - Linus Tischmeier
- NeoPep Pharma GmbH & Co. KG., Hannover, Germany and Hannover Medical School, Department of Internal Medicine, Germany
| | - Jens Hoffmann
- EPO, Experimental Pharmacology & Oncology Berlin-Buch GmbH, Germany
| | - Martin R Berger
- Toxicology and Chemotherapy Unit, German Cancer Research Centre (DKFZ), Heidelberg, Germany.
| | - Wolf-Georg Forssmann
- NeoPep Pharma GmbH & Co. KG., Hannover, Germany and Hannover Medical School, Department of Internal Medicine, Germany.
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Bao G, Wang Z, Liu L, Zhang B, Song S, Wang D, Cheng S, Moon ES, Roesch F, Zhao J, Yu B, Zhu X. Targeting CXCR4/CXCL12 axis via [ 177Lu]Lu-DOTAGA.(SA.FAPi) 2 with CXCR4 antagonist in triple-negative breast cancer. Eur J Nucl Med Mol Imaging 2024:10.1007/s00259-024-06704-y. [PMID: 38587644 DOI: 10.1007/s00259-024-06704-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/16/2024] [Indexed: 04/09/2024]
Abstract
PURPOSE Radiopharmaceutical therapies targeting fibroblast activation protein (FAP) have shown promising efficacy against many tumor types. But radiopharmaceuticals alone in most cases are insufficient to completely eradicate tumor cells, which can partially be attributed to the protective interplay between tumor cells and cancer-associated fibroblasts (CAFs). The C-X-C chemokine receptor type 4/C-X-C motif chemokine 12 (CXCR4/CXCL12) interaction plays an important role in orchestrating tumor cells and CAFs. We hereby investigated the feasibility and efficacy of [177Lu]Lu-DOTAGA.(SA.FAPi)2, a FAP-targeting radiopharmaceutical, in combination with AMD3100, a CXCR4 antagonist, in a preclinical murine model of triple-negative breast cancer (TNBC). METHODS Public database was first interrogated to reveal the correlation between CAFs' scores and the prognosis of TNBC patients, as well as the expression levels of FAP and CXCR4 in normal tissues and tumors. In vitro therapeutic efficacy regarding cell proliferation, migration, and colony formation was assessed in BALB/3T3 fibroblasts and 4T1 murine breast cancer cells. In vivo therapeutic efficacy was longitudinally monitored using serial 18F-FDG, [18F]AlF-NOTA-FAPI-04, and [68Ga]Ga-DOTA-Pentixafor PET/CT scans and validated using tumor sections through immunohistochemical staining of Ki-67, α-SMA, CXCR4, and CXCL12. Intratumoral abundance of myeloid-derived suppressive cells (MDSCs) was analyzed using flow cytometry in accordance with the PET/CT schedules. Treatment toxicity was evaluated by examining major organs including heart, lung, liver, kidney, and spleen. RESULTS CAFs' scores negatively correlated with the survival of TNBC patients (p < 0.05). The expression of CXCR4 and FAP was both significantly higher in tumors than in normal tissues. The combination of [177Lu]Lu-DOTAGA.(SA.FAPi)2 and AMD3100 significantly suppressed cell proliferation, migration, and colony formation in cell culture, and exhibited synergistic effects in 4T1 tumor models along with a decreased number of MDSCs. PET/CT imaging revealed lowest tumor accumulation of 18F-FDG and [18F]AlF-NOTA-FAPI-04 on day 13 and day 14 after treatment started, both of which gradually increased at later time points. A similar trend was observed in the IHC staining of Ki-67, α-SMA, and CXCL12. CONCLUSION The combination of [177Lu]Lu-DOTAGA.(SA.FAPi)2 and AMD3100 is a feasible treatment against TNBC with minimal toxicity in main organs.
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Affiliation(s)
- Guangfa Bao
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Ziqiang Wang
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Luoxia Liu
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Buchuan Zhang
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Shuang Song
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Dongdong Wang
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Siyuan Cheng
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Eu-Song Moon
- Department of Chemistry, Johannes Gutenberg University, 55131, Mainz, Germany
| | - Frank Roesch
- Department of Chemistry, Johannes Gutenberg University, 55131, Mainz, Germany
| | - Jun Zhao
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
- Department of Anatomy, School of Basic Medicine, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, China
- Cell Architecture Research Center, Huazhong University of Science and Technology, Wuhan, Hubei Province, 430030, China
| | - Bo Yu
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China
| | - Xiaohua Zhu
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan, 430030, China.
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Hamshaw I, Cominetti MMD, Lai WY, Searcey M, Mueller A. The development of potent, competitive CXCR4 antagonists for the prevention of cancer metastasis. Biochem Pharmacol 2023; 218:115921. [PMID: 37956893 DOI: 10.1016/j.bcp.2023.115921] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 11/09/2023] [Accepted: 11/10/2023] [Indexed: 11/19/2023]
Abstract
Cancer metastasis is the cause of up to 90 % of cancer related mortality. The CXCR4 receptor and its cognate ligand, CXCL12, have major roles in enabling cancer metastasis and consequently, the CXCR4 receptor has become an attractive therapeutic target for the prevention of metastasis. Despite this, CXCR4 antagonists have had limited success in clinical trials due to cellular toxicity and poor stability and efficacy. In this study, we developed a novel, competitive CXCR4 antagonist (IS4) that through copper-catalysed-azide-alkyne-cycloaddition can be clicked to other chemical moieties such as fluorescent dyes (IS4-FAM) for CXCR4-based imaging. We determined that these CXCR4 antagonists were non-toxic and could be used to specifically label the CXCR4 receptor. Furthermore, IS4 and IS4-FAM inhibited CXCL12-stimulated cancer cell migration and Ca2+ release in both adherent and suspension cell lines with similar or improved potency as compared to two literature CXCR4 antagonists. Our results highlight the potential of IS4 and IS4-FAM as research tools and as potent CXCR4 antagonists for the prevention of metastasis.
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Affiliation(s)
- Isabel Hamshaw
- School of Pharmacy, University of East Anglia, Norwich, UK
| | | | - Wing-Yee Lai
- School of Pharmacy, University of East Anglia, Norwich, UK
| | - Mark Searcey
- School of Pharmacy, University of East Anglia, Norwich, UK
| | - Anja Mueller
- School of Pharmacy, University of East Anglia, Norwich, UK.
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Chaudhuri D, Lu T, Jacob B, Abraham S, Shankar P, Poss MA, Neamati N, Camarero JA. Lipidation of a bioactive cyclotide-based CXCR4 antagonist greatly improves its pharmacokinetic profile in vivo. J Control Release 2023; 359:26-32. [PMID: 37236320 PMCID: PMC10527528 DOI: 10.1016/j.jconrel.2023.05.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/28/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023]
Abstract
The CXCR4 chemokine is a key molecular regulator of many biological functions controlling leukocyte functions during inflammation and immunity, and during embryonic development. Overexpression of CXCR4 is also associated with many types of cancer where its activation promotes angiogenesis, tumor growth/survival, and metastasis. In addition, CXCR4 is involved in HIV replication, working as a co-receptor for viral entry, making CXCR4 a very attractive target for developing novel therapeutic agents. Here we report the pharmacokinetic profile in rats of a potent CXCR4 antagonist cyclotide, MCo-CVX-5c, previously developed in our group that displayed a remarkable in vivo resistance to biological degradation in serum. This bioactive cyclotide, however, was rapidly eliminated through renal clearance. Several lipidated versions of cyclotide MCo-CVX-5c showed a significant increase in the half-life when compared to the unlipidated form. The palmitoylated version of cyclotide MCo-CVX-5c displayed similar CXCR4 antagonistic activity as the unlipidated cyclotide, while the cyclotide modified with octadecanedioic (18-oxo-octadecanoic) acid exhibited a remarkable decrease in its ability to antagonize CXCR4. Similar results were also obtained when tested for its ability to inhibit growth in two cancer cell lines and HIV infection in cells. These results show that the half-life of cyclotides can be improved by lipidation although it can also affect their biological activity depending on the lipid employed.
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Affiliation(s)
- Dipankar Chaudhuri
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Tiangong Lu
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109-2800, USA
| | - Binu Jacob
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Sojan Abraham
- Department of Biomedical Sciences, Center of Excellence in Infectious Disease, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79430, USA
| | - Premlata Shankar
- Department of Biomedical Sciences, Center of Excellence in Infectious Disease, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79430, USA
| | - Michael A Poss
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, NJ 08543, USA
| | - Nouri Neamati
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109-2800, USA
| | - Julio A Camarero
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90089, USA; Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA9033, USA.
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Mistarz A, Winkler M, Battaglia S, Liu S, Hutson A, Rokita H, Gambotto A, Odunsi KO, Singh PK, McGray AR, Wang J, Kozbor D. Reprogramming the tumor microenvironment leverages CD8 + T cell responses to a shared tumor/self antigen in ovarian cancer. Mol Ther Oncolytics 2023; 28:230-248. [PMID: 36875325 PMCID: PMC9982455 DOI: 10.1016/j.omto.2023.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
Tumor antigen-driven responses to weakly immunogenic self-antigens and neoantigens directly affect treatment efficacy following immunotherapy. Using orthotopically grown SV40 T antigen+ ovarian carcinoma in antigen-naive wild-type or TgMISIIR-TAg-Low transgenic mice expressing SV40 T antigen as a self-antigen, we investigated the impact of CXCR4-antagonist-armed oncolytic virotherapy on tumor progression and antitumor immunity. Immunostaining and single-cell RNA sequencing analyses of the peritoneal tumor microenvironment of untreated tumors in syngeneic wild-type mice revealed the presence of SV40 T antigen-specific CD8+ T cells, a balanced M1/M2 transcriptomic signature of tumor-associated macrophages, and immunostimulatory cancer-associated fibroblasts. This contrasted with polarized M2 tumor-associated macrophages, immunosuppressive cancer-associated fibroblasts, and poor immune activation in TgMISIIR-TAg-Low mice. Intraperitoneal delivery of CXCR4-antagonist-armed oncolytic vaccinia virus led to nearly complete depletion of cancer-associated fibroblasts, M1 polarization of macrophages, and generation of SV40 T antigen-specific CD8+ T cells in transgenic mice. Cell depletion studies revealed that the therapeutic effect of armed oncolytic virotherapy was dependent primarily on CD8+ cells. These results demonstrate that targeting the interaction between immunosuppressive cancer-associated fibroblasts and macrophages in the tolerogenic tumor microenvironment by CXCR4-A-armed oncolytic virotherapy induces tumor/self-specific CD8+ T cell responses and consequently increases therapeutic efficacy in an immunocompetent ovarian cancer model.
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Affiliation(s)
- Anna Mistarz
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Marta Winkler
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Sebastiano Battaglia
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Song Liu
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Alan Hutson
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Hanna Rokita
- Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, 30-387 Kraków, Poland
| | - Andrea Gambotto
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Kunle O. Odunsi
- University of Chicago Comprehensive Cancer Center, Chicago, IL 60637, USA
| | - Prashant K. Singh
- Cancer Genetics and Genomics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - A.J. Robert McGray
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Jianmin Wang
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
- Corresponding author: Jianmin Wang, Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263 USA.
| | - Danuta Kozbor
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
- Corresponding author: Danuta Kozbor, Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
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Rodríguez-Alfonso A, Heck A, Ruiz-Blanco YB, Gilg A, Ständker L, Kuan SL, Weil T, Sanchez-Garcia E, Wiese S, Münch J, Harms M. Advanced EPI-X4 Derivatives Covalently Bind Human Serum Albumin Resulting in Prolonged Plasma Stability. Int J Mol Sci 2022; 23. [PMID: 36499357 DOI: 10.3390/ijms232315029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/25/2022] [Accepted: 11/27/2022] [Indexed: 12/05/2022] Open
Abstract
Advanced derivatives of the Endogenous Peptide Inhibitor of CXCR4 (EPI-X4) have shown therapeutic efficacy upon topical administration in animal models of asthma and dermatitis. Here, we studied the plasma stability of the EPI-X4 lead compounds WSC02 and JM#21, using mass spectrometry to monitor the chemical integrity of the peptides and a functional fluorescence-based assay to determine peptide function in a CXCR4-antibody competition assay. Although mass spectrometry revealed very rapid disappearance of both peptides in human plasma within seconds, the functional assay revealed a significantly higher half-life of 9 min for EPI-X4 WSC02 and 6 min for EPI-X4 JM#21. Further analyses demonstrated that EPI-X4 WSC02 and EPI-X4 JM#21 interact with low molecular weight plasma components and serum albumin. Albumin binding is mediated by the formation of a disulfide bridge between Cys10 in the EPI-X4 peptides and Cys34 in albumin. These covalently linked albumin-peptide complexes have a higher stability in plasma as compared with the non-bound peptides and retain the ability to bind and antagonize CXCR4. Remarkably, chemically synthesized albumin-EPI-X4 conjugates coupled by non-breakable bonds have a drastically increased plasma stability of over 2 h. Thus, covalent coupling of EPI-X4 to albumin in vitro before administration or in vivo post administration may significantly increase the pharmacokinetic properties of this new class of CXCR4 antagonists.
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Kato T, Matsuo Y, Ueda G, Murase H, Aoyama Y, Omi K, Hayashi Y, Imafuji H, Saito K, Morimoto M, Ogawa R, Takahashi H, Takiguchi S. Enhanced CXCL12/CXCR4 signaling increases tumor progression in radiation‑resistant pancreatic cancer. Oncol Rep 2022; 47:68. [PMID: 35119076 PMCID: PMC8848476 DOI: 10.3892/or.2022.8279] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/20/2022] [Indexed: 11/17/2022] Open
Abstract
Pancreatic cancer (PaCa) exhibits one of the poorest prognoses among all gastrointestinal cancers due to the rapid development of treatment resistance, which renders chemotherapy and radiotherapy no longer effective. However, the mechanisms through which PaCa becomes resistant to radiotherapy are unknown. Here, we established radiation-resistant PaCa cell lines to investigate the factors involved in radiation resistance. The role of the C-X-C motif chemokine ligand 12 (CXCL12)/C-X-C chemokine receptor type 4 (CXCR4) axis in radiation resistance in PaCa and the effects of a CXCR4 antagonist on radiation-resistant PaCa cell lines were investigated. As confirmed by immunofluorescence staining, reverse transcription quantitative polymerase chain reaction, and western blotting, the expression of CXCR4 was higher in radiation-resistant PaCa cell lines than that noted in normal PaCa cell lines. The invasion ability of radiation-resistant PaCa cell lines was greater than that of normal cell lines and was enhanced by CXCL12 treatment and coculture with fibroblasts; this enhanced invasion ability was suppressed by the CXCR4 antagonist AMD070. Irradiation after treatment with the CXCR4 antagonist suppressed the colonization of radiation-resistant PaCa cell lines. In conclusion, the CXCL12/CXCR4 axis may be involved in the radiation resistance of PaCa. These findings may facilitate the development of novel treatments for PaCa.
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Affiliation(s)
- Tomokatsu Kato
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Yoichi Matsuo
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Goro Ueda
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Hiromichi Murase
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Yoshinaga Aoyama
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Kan Omi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Yuichi Hayashi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Hiroyuki Imafuji
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Kenta Saito
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Mamoru Morimoto
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Ryo Ogawa
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Hiroki Takahashi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
| | - Shuji Takiguchi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan
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Shad MS, Claes S, Goffin E, Van Loy T, Schols D, De Jonghe S, Dehaen W. Synthesis and Anti-HIV Activity of a Novel Series of Isoquinoline-Based CXCR4 Antagonists. Molecules 2021; 26:6297. [PMID: 34684878 DOI: 10.3390/molecules26206297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/13/2021] [Accepted: 10/14/2021] [Indexed: 11/26/2022] Open
Abstract
An expansion of the structure–activity relationship study of CXCR4 antagonists led to the synthesis of a series of isoquinolines, bearing a tetrahydroquinoline or a 3-methylpyridinyl moiety as head group. All compounds were investigated for CXCR4 affinity and antagonism in competition binding and calcium mobilization assays, respectively. In addition, the anti-HIV activity of all analogues was determined. All compounds showed excellent activity, with compound 24c being the most promising one, since it displayed consistently low nanomolar activity in the various assays.
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10
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Harms M, Habib MM, Nemska S, Nicolò A, Gilg A, Preising N, Sokkar P, Carmignani S, Raasholm M, Weidinger G, Kizilsavas G, Wagner M, Ständker L, Abadi AH, Jumaa H, Kirchhoff F, Frossard N, Sanchez-Garcia E, Münch J. An optimized derivative of an endogenous CXCR4 antagonist prevents atopic dermatitis and airway inflammation. Acta Pharm Sin B 2021; 11:2694-2708. [PMID: 34589390 PMCID: PMC8463264 DOI: 10.1016/j.apsb.2020.12.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/10/2020] [Accepted: 12/01/2020] [Indexed: 02/07/2023] Open
Abstract
Aberrant CXCR4/CXCL12 signaling is involved in many pathophysiological processes such as cancer and inflammatory diseases. A natural fragment of serum albumin, named EPI-X4, has previously been identified as endogenous peptide antagonist and inverse agonist of CXCR4 and is a promising compound for the development of improved analogues for the therapy of CXCR4-associated diseases. To generate optimized EPI-X4 derivatives we here performed molecular docking analysis to identify key interaction motifs of EPI-X4/CXCR4. Subsequent rational drug design allowed to increase the anti-CXCR4 activity of EPI-X4. The EPI-X4 derivative JM#21 bound CXCR4 and suppressed CXCR4-tropic HIV-1 infection more efficiently than the clinically approved small molecule CXCR4 antagonist AMD3100. EPI-X4 JM#21 did not exert toxic effects in zebrafish embryos and suppressed allergen-induced infiltration of eosinophils and other immune cells into the airways of animals in an asthma mouse model. Moreover, topical administration of the optimized EPI-X4 derivative efficiently prevented inflammation of the skin in a mouse model of atopic dermatitis. Thus, rationally designed EPI-X4 JM#21 is a novel potent antagonist of CXCR4 and the first CXCR4 inhibitor with therapeutic efficacy in atopic dermatitis. Further clinical development of this new class of CXCR4 antagonists for the therapy of atopic dermatitis, asthma and other CXCR4-associated diseases is highly warranted.
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11
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Luker GD, Yang J, Richmond A, Scala S, Festuccia C, Schottelius M, Wester HJ, Zimmermann J. At the Bench: Pre-clinical evidence for multiple functions of CXCR4 in cancer. J Leukoc Biol 2021; 109:969-989. [PMID: 33104270 PMCID: PMC8254203 DOI: 10.1002/jlb.2bt1018-715rr] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 10/05/2020] [Accepted: 10/06/2020] [Indexed: 12/15/2022] Open
Abstract
Signaling through chemokine receptor, C-X-C chemokine receptor type 4 (CXCR4) regulates essential processes in normal physiology, including embryogenesis, tissue repair, angiogenesis, and trafficking of immune cells. Tumors co-opt many of these fundamental processes to directly stimulate proliferation, invasion, and metastasis of cancer cells. CXCR4 signaling contributes to critical functions of stromal cells in cancer, including angiogenesis and multiple cell types in the tumor immune environment. Studies in animal models of several different types of cancers consistently demonstrate essential functions of CXCR4 in tumor initiation, local invasion, and metastasis to lymph nodes and distant organs. Data from animal models support clinical observations showing that integrated effects of CXCR4 on cancer and stromal cells correlate with metastasis and overall poor prognosis in >20 different human malignancies. Small molecules, Abs, and peptidic agents have shown anticancer efficacy in animal models, sparking ongoing efforts at clinical translation for cancer therapy. Investigators also are developing companion CXCR4-targeted imaging agents with potential to stratify patients for CXCR4-targeted therapy and monitor treatment efficacy. Here, pre-clinical studies demonstrating functions of CXCR4 in cancer are reviewed.
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Affiliation(s)
- Gary D Luker
- Departments of Radiology, Biomedical Engineering, and Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Jinming Yang
- School of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Ann Richmond
- School of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Stefania Scala
- Research Department, Microenvironment Molecular Targets, Istituto Nazionale Tumori IRCCS "Fondazione G. Pascale", Napoli, Italy
| | - Claudio Festuccia
- Department of Applied Clinical Science and Biotechnologies, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
| | - Margret Schottelius
- Department of Nuclear Medicine, Centre Hospitalier Universitaire Vaudois, and Department of Oncology, University of Lausanne, Lausanne, Switzerland
| | - Hans-Jürgen Wester
- Department of Chemistry, Technical University of Munich, Garching, Germany
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12
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Kaiser LM, Harms M, Sauter D, Rawat VPS, Glitscher M, Hildt E, Tews D, Hunter Z, Münch J, Buske C. Targeting of CXCR4 by the Naturally Occurring CXCR4 Antagonist EPI-X4 in Waldenström's Macroglobulinemia. Cancers (Basel) 2021; 13:826. [PMID: 33669329 PMCID: PMC7920274 DOI: 10.3390/cancers13040826] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/05/2021] [Accepted: 02/11/2021] [Indexed: 12/31/2022] Open
Abstract
CXCR4 expression and downstream signaling have been identified as key factors in malignant hematopoiesis. Thus, up to 40% of all patients with Waldenström's macroglobulinemia (WM) carry an activating mutation of CXCR4 that leads to a more aggressive clinical course and inferior outcome upon treatment with the Bruton's tyrosine kinase inhibitor ibrutinib. Nevertheless, little is known about physiological mechanisms counteracting CXCR4 signaling in hematopoietic neoplasms. Recently, the endogenous human peptide EPI-X4 was identified as a natural CXCR4 antagonist that effectively blocks CXCL12-mediated receptor internalization and suppresses the migration and invasion of cancer cells towards a CXCL12 gradient. Here, we demonstrate that EPI-X4 efficiently binds to CXCR4 of WM cells and decreases their migration towards CXCL12. The CXCR4 inhibitory activity of EPI-X4 is accompanied by reduced expression of genes involved in MAPK signaling and energy metabolism. Notably, the anti-WM activity of EPI-X4 could be further augmented by the rational design of EPI-X4 derivatives showing higher binding affinity to CXCR4. In summary, these data demonstrate that a naturally occurring anti-CXCR4 peptide is able to interfere with WM cell behaviour, and that optimized derivatives of EPI-X4 may represent a promising approach in suppressing growth promoting CXCR4 signaling in WM.
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Affiliation(s)
- Lisa Marie Kaiser
- Comprehensive Cancer Center Ulm, Institute of Experimental Cancer Research, University Hospital Ulm, 89081 Ulm, Germany; (L.M.K.); (V.P.S.R.)
| | - Mirja Harms
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany; (M.H.); (D.S.); (J.M.)
| | - Daniel Sauter
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany; (M.H.); (D.S.); (J.M.)
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Vijay P. S. Rawat
- Comprehensive Cancer Center Ulm, Institute of Experimental Cancer Research, University Hospital Ulm, 89081 Ulm, Germany; (L.M.K.); (V.P.S.R.)
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, Delhi 110067, India
| | - Mirco Glitscher
- Department of Virology, Paul-Ehrlich-Institute, 63225 Langen, Germany; (M.G.); (E.H.)
| | - Eberhard Hildt
- Department of Virology, Paul-Ehrlich-Institute, 63225 Langen, Germany; (M.G.); (E.H.)
| | - Daniel Tews
- Department of Pediatrics and Adolescent Medicine, University Hospital Ulm, 89081 Ulm, Germany;
| | - Zachary Hunter
- Bing Center for Waldenström’s Macroglobulinemia, Boston, MA 02215, USA;
| | - Jan Münch
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany; (M.H.); (D.S.); (J.M.)
| | - Christian Buske
- Comprehensive Cancer Center Ulm, Institute of Experimental Cancer Research, University Hospital Ulm, 89081 Ulm, Germany; (L.M.K.); (V.P.S.R.)
- Department of Internal Medicine III, University Hospital Ulm, 89081 Ulm, Germany
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13
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Fang X, Fang X, Mao Y, Ciechanover A, Xu Y, An J, Huang Z. A novel small molecule CXCR4 antagonist potently mobilizes hematopoietic stem cells in mice and monkeys. Stem Cell Res Ther 2021; 12:17. [PMID: 33413613 PMCID: PMC7791974 DOI: 10.1186/s13287-020-02073-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 12/06/2020] [Indexed: 12/28/2022] Open
Abstract
Background Hematopoietic stem cell (HSC) transplantation is an effective treatment strategy for many types of diseases. Peripheral blood (PB) is the most commonly used source of bone marrow (BM)-derived stem cells for current HSC transplantation. However, PB usually contains very few HSCs under normal conditions, as these cells are normally retained within the BM. This retention depends on the interaction between the CXC chemokine receptor 4 (CXCR4) expressed on the HSCs and its natural chemokine ligand, stromal cell-derived factor (SDF)-1α (also named CXCL12) present in the BM stromal microenvironment. In clinical practice, blocking this interaction with a CXCR4 antagonist can induce the rapid mobilization of HSCs from the BM into the PB. Methods C3H/HEJ, DBA/2, CD45.1+, and CD45.2+ mice and monkeys were employed in colony-forming unit (CFU) assays, flow cytometry assays, and competitive/noncompetitive transplantation assays, to assess the short-term mobilization efficacy of HF51116 and the long-term repopulating (LTR) ability of HSCs. Kinetics of different blood cells and the concentration of HF51116 in PB were also explored by blood routine examinations and pharmacokinetic assays. Results In this paper, we report that a novel small molecule CXCR4 antagonist, HF51116, which was designed and synthesized by our laboratory, can rapidly and potently mobilize HSCs from BM to PB in mice and monkeys. HF51116 not only mobilized HSCs when used alone but also synergized with the mobilizing effects of granulocyte colony-stimulating factor (G-CSF) after co-administration. Following mobilization by HF51116 and G-CSF, the long-term repopulating (LTR) and self-renewing HSCs were sufficiently engrafted in primary and secondary lethally irradiated mice and were able to rescue and support long-term mouse survival. In monkeys, HF51116 exhibited strong HSC mobilization activity and quickly reached the highest in vivo blood drug concentration. Conclusions These results demonstrate that HF51116 is a new promising stem cell mobilizer which specifically targets CXCR4 and merits further preclinical and clinical studies.
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Affiliation(s)
- Xiao Fang
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xiong Fang
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Yujia Mao
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Aaron Ciechanover
- The Rapport Faculty of Medicine, Technion-Israel Institute of Technology, 3109601, Haifa, Israel.,Nobel Institute of Biomedicine, Zhuhai, 519080, China.,Ciechanover Institute of Precision and Regenerative Medicine, School of Life and Health Sciences, Chinese University of Hong Kong, Shenzhen, China
| | - Yan Xu
- School of Life Sciences, Tsinghua University, Beijing, China.,Nobel Institute of Biomedicine, Zhuhai, 519080, China.,Ciechanover Institute of Precision and Regenerative Medicine, School of Life and Health Sciences, Chinese University of Hong Kong, Shenzhen, China
| | - Jing An
- Division of Infectious Diseases and Global Public Health, Department of Medicine, School of Medicine, University of California at San Diego, La Jolla, CA, USA.
| | - Ziwei Huang
- School of Life Sciences, Tsinghua University, Beijing, China. .,Ciechanover Institute of Precision and Regenerative Medicine, School of Life and Health Sciences, Chinese University of Hong Kong, Shenzhen, China. .,Division of Infectious Diseases and Global Public Health, Department of Medicine, School of Medicine, University of California at San Diego, La Jolla, CA, USA.
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14
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Martin M, Mayer IA, Walenkamp AME, Lapa C, Andreeff M, Bobirca A. At the Bedside: Profiling and treating patients with CXCR4-expressing cancers. J Leukoc Biol 2020; 109:953-967. [PMID: 33089889 DOI: 10.1002/jlb.5bt1219-714r] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 08/27/2020] [Accepted: 08/27/2020] [Indexed: 12/18/2022] Open
Abstract
The chemokine receptor, C-X-C chemokine receptor type 4 (CXCR4) and its ligand, C-X-C motif chemokine 12, are key mediators of hematopoietic cell trafficking. Their roles in the proliferation and metastasis of tumor cells, induction of angiogenesis, and invasive tumor growth have been recognized for over 2 decades. CXCR4 is a promising target for imaging and therapy of both hematologic and solid tumors. To date, Sanofi Genzyme's plerixafor is the only marketed CXCR4 inhibitor (i.e., Food and Drug Administration-approved in 2008 for stem cell mobilization). However, several new CXCR4 inhibitors are now being investigated as potential therapies for a variety of fluid and solid tumors. These small molecules, peptides, and Abs include balixafortide (POL6326, Polyphor), mavorixafor (X4P-001, X4 Pharmaceuticals), motixafortide (BL-8040, BioLineRx), LY2510924 (Eli Lilly), and ulocuplumab (Bristol-Myers Squibb). Early clinical evidence has been encouraging, for example, with motixafortide and balixafortide, and the CXCR4 inhibitors appear to be generally safe and well tolerated. Molecular imaging is increasingly being used for effective patient selection before, or early during CXCR4 inhibitor treatment. The use of radiolabeled theranostics that combine diagnostics and therapeutics is an additional intriguing approach. The current status and future directions for radioimaging and treating patients with CXCR4-expressing hematologic and solid malignancies are reviewed. See related review - At the Bench: Pre-Clinical Evidence for Multiple Functions of CXCR4 in Cancer. J. Leukoc. Biol. xx: xx-xx; 2020.
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Affiliation(s)
- Miguel Martin
- Oncology Department, Instituto de Investigación Sanitaria Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
| | - Ingrid A Mayer
- Division of Hematology/Oncology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Annemiek M E Walenkamp
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Constantin Lapa
- Nuclear Medicine, Medical Faculty, University of Augsburg, Augsburg, Germany
| | - Michael Andreeff
- Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas, Maryland Anderson Cancer Center, Houston, Texas, USA
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15
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Smith-Berdan S, Bercasio A, Rajendiran S, Forsberg EC. Viagra Enables Efficient, Single-Day Hematopoietic Stem Cell Mobilization. Stem Cell Reports 2019; 13:787-792. [PMID: 31607567 PMCID: PMC6895718 DOI: 10.1016/j.stemcr.2019.09.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 09/10/2019] [Accepted: 09/10/2019] [Indexed: 12/31/2022] Open
Abstract
Hematopoietic stem cell (HSC) transplantation is a curative treatment for a variety of blood and immune disorders. Currently available methods to obtain donor HSCs are suboptimal, and the limited supply of donor HSCs hampers the success and availability of HSC transplantation therapies. We recently showed that manipulation of vascular integrity can be employed to induce HSC mobilization from the bone marrow to the blood stream, facilitating non-invasive collection of HSCs. Here, we tested whether FDA-approved vasodilators are capable of mobilizing HSCs. We found that a rapid, 2-h regimen of a single oral dose of Viagra (sildenafil citrate) combined with a single injection of the CXCR4 antagonist AMD3100 leads to efficient HSC mobilization at levels rivaling the standard-of-care 5-day regimen of granulocyte-colony stimulating factor (G-CSF/Filgrastim/Neupogen). Our findings solidify vascular integrity as an essential regulator of HSC trafficking and provide an attractive, single-day regimen for HSC mobilization using already FDA-approved drugs. Viagra enhances AMD3100-mediated HSC mobilization Extremely rapid and efficient HSC mobilization with two FDA-approved drugs Vascular integrity regulates HSC trafficking
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Affiliation(s)
- Stephanie Smith-Berdan
- Institute for the Biology of Stem Cells, Department of Biomolecular Engineering, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
| | - Alyssa Bercasio
- Institute for the Biology of Stem Cells, Department of Biomolecular Engineering, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
| | - Smrithi Rajendiran
- Institute for the Biology of Stem Cells, Department of Biomolecular Engineering, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
| | - E Camilla Forsberg
- Institute for the Biology of Stem Cells, Department of Biomolecular Engineering, University of California, 1156 High Street, Santa Cruz, CA 95064, USA.
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16
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Mistarz A, Komorowski MP, Graczyk MA, Gil M, Jiang A, Opyrchal M, Rokita H, Odunsi KO, Kozbor D. Recruitment of Intratumoral CD103 + Dendritic Cells by a CXCR4 Antagonist-Armed Virotherapy Enhances Antitumor Immunity. Mol Ther Oncolytics 2019; 14:233-245. [PMID: 31384667 PMCID: PMC6667789 DOI: 10.1016/j.omto.2019.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 06/21/2019] [Indexed: 01/16/2023] Open
Abstract
Intratumoral dendritic cells play an important role in stimulating cytotoxic T cells and driving antitumor immunity. Using a metastatic ovarian tumor model in syngeneic mice, we explored whether therapy with a CXCR4 antagonist-armed oncolytic vaccinia virus activates endogenous CD103+ dendritic cell responses associated with the induction of adaptive immunity against viral and tumor antigens. The overall goal of this study was to determine whether expansion of CD103+ dendritic cells by the virally delivered CXCR4 antagonist augments overall survival and in situ boosting with a tumor antigen peptide-based vaccine. We found that locoregional delivery of the CXCR4-A-armed virus reduced the tumor load and the immunosuppressive network in the tumor microenvironment, leading to infiltration of CD103+ dendritic cells that were capable of phagocytic clearance of cellular material from virally infected cancer cells. Further expansion of tumor-resident CD103+ DCs by injecting the FMS-related tyrosine kinase 3 ligand, the formative cytokine for CD103+ DCs, provided a platform for a booster immunization with the Wilms tumor antigen 1 peptide-based vaccine delivered intraperitoneally with polyriboinosinic:polyribocytidylic acid as an adjuvant. The vaccine-induced antitumor responses inhibited tumor growth and increased overall survival, indicating that expansion of intratumoral CD103+ dendritic cells by CXCR4-A-armed oncovirotherapy treatment can potentiate in situ cancer vaccine boosting.
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Affiliation(s)
- Anna Mistarz
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Marcin P. Komorowski
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Matthew A. Graczyk
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Margaret Gil
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Aimin Jiang
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Mateusz Opyrchal
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Hanna Rokita
- Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Kunle O. Odunsi
- Center for Immunotherapy, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
- Department of Gynecologic Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Danuta Kozbor
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
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17
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Yoshida S, Kawai H, Eguchi T, Sukegawa S, Oo MW, Anqi C, Takabatake K, Nakano K, Okamoto K, Nagatsuka H. Tumor Angiogenic Inhibition Triggered Necrosis (TAITN) in Oral Cancer. Cells 2019; 8:cells8070761. [PMID: 31336612 PMCID: PMC6678844 DOI: 10.3390/cells8070761] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/18/2019] [Accepted: 07/20/2019] [Indexed: 01/09/2023] Open
Abstract
CXCR4 is a chemokine receptor crucial in tumor progression, although the angiogenic role of CXCR4 in oral squamous cell carcinoma (OSCC) has not been investigated. Here we show that CXCR4 is crucial for tumor angiogenesis, thereby supporting tumor survival in OSCC. Immunohistochemistry on human clinical specimens revealed that CXCR4 and a tumor vasculature marker CD34 were co-distributed in tumor vessels in human OSCC specimens. To uncover the effects of CXCR4 inhibition, we treated the OSCC-xenografted mice with AMD3100, so-called plerixafor, an antagonist of CXCR4. Notably, we found a unique pathophysiological structure defined as tumor angiogenic inhibition triggered necrosis (TAITN), which was induced by the CXCR4 antagonism. Treatment with AMD3100 increased necrotic areas with the induction of hypoxia-inducible factor-1α in the xenografted tumors, suggesting that AMD3100-induced TAITN was involved in hypoxia and ischemia. Taken together, we demonstrated that CXCR4 plays a crucial role in tumor angiogenesis required for OSCC progression, whereas TAITN induced by CXCR4 antagonism could be an effective anti-angiogenic therapeutic strategy in OSCC treatment.
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Affiliation(s)
- Saori Yoshida
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Hotaka Kawai
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan.
| | - Takanori Eguchi
- Department of Dental Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan.
- Advanced Research Center for Oral and Craniofacial Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan.
| | - Shintaro Sukegawa
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
- Division of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, Takamatsu, Kagawa 760-8557, Japan
| | - May Wathone Oo
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Chang Anqi
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
- Department of Anatomy, Basic Medicine Science College, Harbin Medical University, Harbin 150076, China
| | - Kiyofumi Takabatake
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Keisuke Nakano
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
- Advanced Research Center for Oral and Craniofacial Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Kuniaki Okamoto
- Department of Dental Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Hitoshi Nagatsuka
- Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
- Advanced Research Center for Oral and Craniofacial Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
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18
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Zeng Y, Li B, Liang Y, Reeves PM, Qu X, Ran C, Liu Q, Callahan MV, Sluder AE, Gelfand JA, Chen H, Poznansky MC. Dual blockade of CXCL12-CXCR4 and PD-1-PD-L1 pathways prolongs survival of ovarian tumor-bearing mice by prevention of immunosuppression in the tumor microenvironment. FASEB J 2019; 33:6596-6608. [PMID: 30802149 PMCID: PMC6463916 DOI: 10.1096/fj.201802067rr] [Citation(s) in RCA: 114] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Blockade of immune-checkpoint programmed cell death protein 1 (PD-1) or programmed cell death ligand 1 can enhance effector T-cell responses. However, the lack of response in many patients to checkpoint-inhibitor therapies emphasizes the need for combination immunotherapies to pursue maximal antitumor efficacy. We have previously demonstrated that antagonism of C-X-C chemokine receptor type 4 (CXCR4) by plerixafor (AMD3100) can decrease regulatory T (Treg)-cell intratumoral infiltration. Therefore, a combination of these 2 therapies might increase antitumor effects. Here, we evaluated the antitumor efficacy of AMD3100 and anti-PD-1 (αPD-1) antibody alone or in combination in an immunocompetent syngeneic mouse model of ovarian cancer. We found that AMD3100, a highly specific CXCR4 antagonist, directly down-regulated the expression of both C-X-C motif chemokine 12 (CXCL12) and CXCR4 in vitro and in vivo in tumor cells. AMD3100 and αPD-1 significantly inhibited tumor growth and prolonged the survival of tumor-bearing mice when given as monotherapy. Combination of these 2 agents significantly enhanced antitumor effects compared with single-agent administration. Benefits of tumor control and animal survival were associated with immunomodulation mediated by these 2 agents, which were characterized by increased effector T-cell infiltration, increased effector T-cell function, and increased memory T cells in tumor microenvironment. Intratumoral Treg cells were decreased, and conversion of Treg cells into T helper cells was increased by AMD3100 treatment. Intratumoral myeloid-derived suppressor cells were decreased by the combined treatment, which was associated with decreased IL-10 and IL-6 in the ascites. Also, the combination therapy decreased suppressive leukocytes and facilitated M2-to-M1 macrophage polarization in the tumor. These results suggest that AMD3100 could be used to target the CXCR4-CXCL12 axis to inhibit tumor growth and prevent multifaceted immunosuppression alone or in combination with αPD-1 in ovarian cancer, which could be clinically relevant to patients with this disease.-Zeng, Y., Li, B., Liang, Y., Reeves, P. M., Qu, X., Ran, C., Liu, Q., Callahan, M. V., Sluder, A. E., Gelfand, J. A., Chen, H., Poznansky, M. C. Dual blockade of CXCL12-CXCR4 and PD-1-PD-L1 pathways prolongs survival of ovarian tumor-bearing mice by prevention of immunosuppression in the tumor microenvironment.
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Affiliation(s)
- Yang Zeng
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Binghao Li
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Yingying Liang
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Patrick M. Reeves
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Xiying Qu
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Chongzhao Ran
- Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA; and
| | - Qiuyan Liu
- National Key Laboratory of Medical Immunology, Second Military Medical University, Shanghai, China
| | - Michael V. Callahan
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Ann E. Sluder
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Jeffrey A. Gelfand
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Huabiao Chen
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA;,Correspondence: Vaccine and Immunotherapy Center, Massachusetts General Hospital (East), 149 13th St., Charlestown, MA 02129, USA. E-mail:
| | - Mark C. Poznansky
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
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19
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Kwon SG, Park I, Kwon YW, Lee TW, Park GT, Kim JH. Role of stem cell mobilization in the treatment of ischemic diseases. Arch Pharm Res 2019; 42:224-31. [PMID: 30680545 DOI: 10.1007/s12272-019-01123-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 01/16/2019] [Indexed: 12/13/2022]
Abstract
Stem cell mobilization plays important roles in the treatment of severe ischemic diseases, including myocardial infarction, limb ischemia, ischemic stroke, and acute kidney injury. Stem cell mobilization refers to the egress of heterogeneous stem cells residing in the bone marrow into the peripheral blood. In the clinic, granulocyte colony-stimulating factor (G-CSF) is the drug most commonly used to induce stem cell mobilization. Plerixafor, a direct antagonist of CXCR4, is also frequently used alone or in combination with G-CSF to mobilize stem cells. The molecular mechanisms by which G-CSF induces stem cell mobilization are well characterized. Briefly, G-CSF activates neutrophils in the bone marrow, which then release proteolytic enzymes, such as neutrophil elastase, cathepsin G, and matrix metalloproteinase 9, which cleave a variety of molecules responsible for stem cell retention in the bone marrow, including CXCL12, VCAM-1, and SCF. Subsequently, stem cells are released from the bone marrow into the peripheral blood. The released stem cells can be collected and used in autologous or allogeneic transplantation. To identify better conditions for stem cell mobilization in the treatment of acute and chronic ischemic diseases, several preclinical and clinical studies have been conducted over the past decade on various mobilizing agents. In this paper, we are going to review methods that induce mobilization of stem cells from the bone marrow and introduce the application of stem cell mobilization to therapy of ischemic diseases.
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20
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Zheng N, Liu W, Chen J, Li B, Liu J, Wang J, Gao Y, Shao J, Jia L. CXCR7 is not obligatory for CXCL12-CXCR4-induced epithelial-mesenchymal transition in human ovarian cancer. Mol Carcinog 2018; 58:144-155. [PMID: 30259564 DOI: 10.1002/mc.22916] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 09/05/2018] [Accepted: 09/14/2018] [Indexed: 12/25/2022]
Abstract
Although the CXCL12-CXCR4/CXCR7 chemokine axis is demonstrated to play an integral role in tumor progression, the controversy exists and the role of CXCL12-CXCR4/CXCR7 signaling axis in epithelial-mesenchymal transition (EMT) of human ovarian cancer has not been explored. Here, we showed that in ovarian cancer CXCL12 induced EMT phenotypes including the spindle-like cell morphology, podia and stress fiber formation, a decrease in E-cadherin expression, and increases in mesenchymal N-cadherin and vimentin expressions. These effects of CXCL12 could be antagonized by the CXCR4 antagonist AMD3100, but not by the anti-CXCR7 antibody. The expressions of the EMT markers were significantly down-regulated by the CXCR4 siRNA, and up-regulated by the pcDNA3.1/CXCR4 plasmid, whereas not affected by the CXCR7 siRNA. Furthermore, intraperitoneal administration of AMD3100 inhibited tumor dissemination and growth in the nude mice inoculated with ovarian IGROV-1 cells with a concomitant reduction in EMT marker expressions. Collectively, these data suggest that CXCR4, rather than CXCR7, plays a key role in CXCL12-activated EMT phenotypes, and targeting the CXCL12-CXCR4 chemokine axis represents a potential therapeutic strategy to prevent ovarian cancer progression.
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Affiliation(s)
- Ning Zheng
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Weiqun Liu
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jiahang Chen
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Bifei Li
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jian Liu
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jichuang Wang
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, Fujian Medical University, Fuzhou, Fujian, China
| | - Yu Gao
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jingwei Shao
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Lee Jia
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
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21
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Liu L, Yu Q, Fu S, Wang B, Hu K, Wang L, Hu Y, Xu Y, Yu X, Huang H. CXCR4 Antagonist AMD3100 Promotes Mesenchymal Stem Cell Mobilization in Rats Preconditioned with the Hypoxia-Mimicking Agent Cobalt Chloride. Stem Cells Dev 2018; 27:466-478. [PMID: 29433375 DOI: 10.1089/scd.2017.0191] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Mobilization of mesenchymal stem cells (MSCs) is an attractive strategy for cell therapy. Our previous study demonstrated that MSCs can be mobilized in circulating blood by short-term hypoxia, and hypoxia-inducible factor-1α is essential for MSC mobilization. In the present study, the effect of the hypoxia-mimicking agent CoCl2 was examined on MSC mobilization. The results indicated that the frequency of circulating MSCs increased slightly by administration of CoCl2. However, the mobilization efficiency was low. Considering the critical role of stromal cell-derived factor-1α (SDF-1)/CXCR4 axis in the regulation of MSC migration, the effects of granulocyte colony-stimulating factor (G-CSF) and the CXCR4 antagonist AMD3100 were investigated on MSC mobilization. The experiments were notably demonstrated in animals preconditioned with CoCl2. The frequency of colony-forming unit fibroblast and the proportion of CD45-CD90+ cells did not significantly increase in the peripheral blood of rats treated with G-CSF and/or AMD3100 alone. The concomitant administration of G-CSF with CoCl2 could not stimulate the release of MSCs. However, AMD3100 dramatically increased MSC mobilization efficiency in rats pretreated with CoCl2. Furthermore, we identified and compared the multilineage differentiation capacities of MSCs derived from bone marrow (BM-MSCs) and mobilized peripheral blood (PB-MSCs). The results indicated that PB-MSCs exhibited higher osteogenic potential and lower adipogenic differentiation as compared with BM-MSCs. The findings may inform studies investigating mechanisms of the regulation of MSC mobilization and can aid in the development of clinically useful therapeutic agents.
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Affiliation(s)
- Lizhen Liu
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - Qin Yu
- 2 College of Life Science, Zhejiang Chinese Medical University , Hangzhou, People's Republic of China
| | - Shan Fu
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - Binsheng Wang
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - Kaimin Hu
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - Limengmeng Wang
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - Yongxian Hu
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - Yulin Xu
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - Xiaohong Yu
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
| | - He Huang
- 1 Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, People's Republic of China
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Abstract
![]()
An HPMA-based polymeric prodrug of
a CXCR4 antagonist, AMD3465
(P-SS-AMD), was developed as a dual-function carrier of therapeutic
miRNA. P-SS-AMD was synthesized by a copolymerization of HPMA with
a methacrylamide monomer in which the AMD3465 was attached via a self-immolative
disulfide linker. P-SS-AMD showed effective release of the parent
AMD3465 drug following treatment with intracellular levels of glutathione
(GSH). The AMD3465 was released in the cells and exhibited functional
CXCR4 antagonism, demonstrated by inhibition of the CXCR4-mediated
cancer cell invasion. Due to its cationic character, P-SS-AMD could
form polyplexes with miRNA and mediate efficient transfection of miR-200c
mimics to downregulate expression of a downstream target ZEB-1 in
cancer cells. The combined P-SS-AMD/miR-200c polyplexes showed improved
ability to inhibit cancer cell migration when compared with individual
treatments. The reported findings validate P-SS-AMD as a dual-function
delivery vector that can simultaneously deliver a therapeutic miRNA
and function as a polymeric prodrug of CXCR4 antagonist.
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Affiliation(s)
- Zheng-Hong Peng
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - Ying Xie
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - Yan Wang
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - Jing Li
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - David Oupický
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
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23
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Tanaka T, Aoki T, Nomura W, Tamamura H. Bivalent 14-mer peptide ligands of CXCR4 with polyproline linkers with anti-chemotactic activity against Jurkat cells. J Pept Sci 2017; 23:574-580. [PMID: 28078743 DOI: 10.1002/psc.2946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/10/2016] [Accepted: 11/11/2016] [Indexed: 11/07/2022]
Abstract
Interaction of CXCR4 with its endogenous ligand, stromal-cell derived factor-1 (SDF-1)/CXCL12, induces various physiological functions involving chemotaxis. Bivalent ligands with a polyproline helix bearing a cyclic pentapeptide, FC131, were previously shown to have higher binding affinities for CXCR4 than the corresponding monovalent ligands. Bivalent ligands based on a 14-mer peptide T140 derivative with polyproline linkers have been designed and synthesized. The activity of these peptides as well as the effect of bivalency of the ligand on CXCR4 binding has been assessed. The binding affinity of these series of bivalent ligands is increased as the linker length increases up to the 12-/15-mer proline linker. The inhibitory activity against chemotaxis on Jurkat cells also depends on the linker length. The T140-derived bivalent ligands with the 9- and 12-mer proline linkers showed the most effective inhibition against chemotaxis at 1000 nM, which is even higher than that of known CXCR4 antagonists in the monomer structure. The effective metastatic inhibition by bivalent T140 derivatives indicates the therapeutic potential. Copyright © 2017 European Peptide Society and John Wiley & Sons, Ltd.
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Affiliation(s)
- Tomohiro Tanaka
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Toru Aoki
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Wataru Nomura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
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24
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Reinholdt L, Laursen MB, Schmitz A, Bødker JS, Jakobsen LH, Bøgsted M, Johnsen HE, Dybkær K. The CXCR4 antagonist plerixafor enhances the effect of rituximab in diffuse large B-cell lymphoma cell lines. Biomark Res 2016; 4:12. [PMID: 27307990 PMCID: PMC4908729 DOI: 10.1186/s40364-016-0067-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 06/08/2016] [Indexed: 12/25/2022] Open
Abstract
Background Diffuse large B-cell lymphoma (DLBCL) is an aggressive disease with variable clinical outcome, accounting for at least 25-30 % of adult non-Hodgkin lymphomas. Approximately one third of DLBCL patients are not cured by the currently used treatment regimen, R-CHOP. Hence, new treatment strategies are needed. Antagonizing the CXCR4 receptor might be promising since the CXCR4-CXCL12 axis is implicated in several aspects of tumor pathogenesis as well as in protection from chemotherapeutic response. In Burkitt lymphoma, the CXCR4 antagonist plerixafor has already been shown to enhance the therapeutic effect of rituximab, the immunotherapeutic agent of R-CHOP; but this is yet to be confirmed for DLBCL. We, therefore, investigated the effect of plerixafor on DLBCL cellular response to rituximab. Methods In this in vitro study, human DLBCL cell lines were treated with rituximab and/or plerixafor, concomitantly or in sequence. The trypan blue exclusion method and MTS-based assays were used to evaluate cellular proliferation, whereas flow cytometry was used for assessment of apoptosis status and CXCR4 surface expression level. Linear mixed effects models were used to assess statistical significance. Results We observed that simultaneous addition of plerixafor and rituximab resulted in a significant decrease in DLBCL cellular proliferation, compared to monotherapeutic response. The effect was dose-dependent, and concomitant administration was observed to be superior to sequential drug administration. Accordingly, the fraction of apoptotic/dead cells significantly increased following addition of plerixafor to rituximab treatment. Furthermore, exposure of DLBCL cells to plerixafor resulted in a significant decrease in CXCR4 fluorescence intensity. Conclusions Based on our results, implying that the anti-proliferative/pro-apoptotic effect of rituximab on DLBCL cells can be synergistically enhanced by the CXCR4 antagonist plerixafor, addition of plerixafor to the R-CHOP regimen can be suggested to improve treatment outcome for DLBCL patients. Electronic supplementary material The online version of this article (doi:10.1186/s40364-016-0067-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Linn Reinholdt
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
| | - Maria Bach Laursen
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
| | - Alexander Schmitz
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Clinical Cancer Research Center, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
| | - Julie Støve Bødker
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Clinical Cancer Research Center, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
| | - Lasse Hjort Jakobsen
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Department of Clinical Medicine, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
| | - Martin Bøgsted
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Clinical Cancer Research Center, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Department of Clinical Medicine, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
| | - Hans Erik Johnsen
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Clinical Cancer Research Center, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Department of Clinical Medicine, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
| | - Karen Dybkær
- Department of Haematology, Aalborg University Hospital, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Clinical Cancer Research Center, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark ; Department of Clinical Medicine, Aalborg University, Sdr Skovvej 15, Aalborg, DK-9000 Denmark
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25
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Morimoto M, Matsuo Y, Koide S, Tsuboi K, Shamoto T, Sato T, Saito K, Takahashi H, Takeyama H. Enhancement of the CXCL12/CXCR4 axis due to acquisition of gemcitabine resistance in pancreatic cancer: effect of CXCR4 antagonists. BMC Cancer 2016; 16:305. [PMID: 27175473 PMCID: PMC4866076 DOI: 10.1186/s12885-016-2340-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 05/08/2016] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The CXCL12-CXCR4 signaling axis in malignant tumor biology has increased in importance, and these peptides are implicated in tumor growth, invasion and metastasis. The aim of our study was to examine the important role of the axis in pancreatic cancer (PaCa) cells' relationship with stromal cells in gemcitabine-resistant (GEM-R) tumors and to confirm the effectiveness of CXCR4 antagonists for the treatment of GEM-R PaCa cells. METHODS We established two GEM-R PaCa cell lines using MIA PaCa-2 and AsPC-1 cells. The expression of CXCR4 mRNA in PaCa cells and the expression of CXCL12 mRNA in fibroblasts were examined by reverse transcription polymerase chain reaction (RT-PCR). The expression of CXCR4 protein in PaCa cells was examined by immunosorbent assay (ELISA) and immunocytochemistry. Using Matrigel invasion assays and animal studies, we then examined the effects of two CXCR4 antagonists, AMD11070 and KRH3955, on the invasiveness and tumorigenicity of GEM-R PaCa cells stimulated by CXCL12. RESULTS We found that the expression of CXCR4 in GEM-R PaCa cells was significantly enhanced by GEM but not in normal GEM-sensitive (GEM-S) PaCa cells. In RT-PCR and ELISA assays, the production and secretion of CXCL12 from fibroblasts was significantly enhanced by co-culturing with GEM-R PaCa cells treated with GEM. In Matrigel invasion assays, the invasiveness of GEM-R PaCa cells treated with GEM was significantly activated by fibroblast-derived CXCL12 and was significantly inhibited by CXCR4 antagonists, AMD11070 and KRH3955. In vivo, the tumorigenicity of GEM-R PaCa cells was activated by GEM, and it was significantly inhibited by the addition with CXCR4 antagonists. CONCLUSIONS Our findings demonstrate that the CXCL12-CXCR4 signaling axis plays an important role in PaCa cells' resistance to GEM. CXCR4 expression was significantly enhanced by the exposure to GEM in GEM-R PaCa cells but not in GEM-S PaCa cells. Furthermore, CXCR4 antagonists can inhibit the growth and invasion of GEM-R PaCa cells. These agents may be useful as second-line chemotherapy for GEM-R PaCa in the future.
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Affiliation(s)
- Mamoru Morimoto
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
| | - Yoichi Matsuo
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan.
| | - Shuji Koide
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
| | - Ken Tsuboi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
| | - Tomoya Shamoto
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
| | - Takafumi Sato
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
| | - Kenta Saito
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
| | - Hiroki Takahashi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
| | - Hiromitsu Takeyama
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, Kawasumi 1, Mizuho-cho, Mizuhoku, Nagoya, 467-8601, Japan
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26
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Wang Y, Liang WC, Pan WL, Law WK, Hu JS, Ip DTM, Waye MMY, Ng TB, Wan DCC. Silibinin, a novel chemokine receptor type 4 antagonist, inhibits chemokine ligand 12-induced migration in breast cancer cells. Phytomedicine 2014; 21:1310-1317. [PMID: 25172795 DOI: 10.1016/j.phymed.2014.06.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/15/2014] [Accepted: 06/27/2014] [Indexed: 06/03/2023]
Abstract
PURPOSE C-X-C chemokine receptor type 4 (CXCR4) signaling has been demonstrated to be involved in cancer invasion and migration; therefore, CXCR4 antagonist can serve as an anti-cancer drug by preventing tumor metastasis. This study aimed to identify the CXCR4 antagonists that could reduce and/or inhibit tumor metastasis from natural products. METHODS AND RESULTS According to the molecular docking screening, we reported here silibinin as a novel CXCR4 antagonist. Biochemical characterization showed that silibinin blocked chemokine ligand 12 (CXCL12)-induced CXCR4 internalization by competitive binding to CXCR4, therefore inhibiting downstream intracellular signaling. In human breast cancer cells MDA-MB-231, which expresses high levels of CXCR4, inhibition of CXCL12-induced chemomigration can be found under silibinin treatment. Overexpression of CXCL12 sensitized MDA-MB-231 cells to the inhibition of silibinin, which was abolished by CXCR4 knockdown. The inhibition of silibinin was also observed in MCF-7/CXCR4 cells rather than MCF-7 cells that express low level of CXCR4. CONCLUSIONS Our work demonstrated that silibinin is a novel CXCR4 antagonist that may have potential therapeutic use for prevention of tumor metastasis.
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Affiliation(s)
- Yan Wang
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Wei-Cheng Liang
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Wen-Liang Pan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Wai-Kit Law
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Jian-Shu Hu
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Denis Tsz-Ming Ip
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Mary Miu-Yee Waye
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Tzi-Bun Ng
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - David Chi-Cheong Wan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region.
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27
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Inokuchi E, Oishi S, Kubo T, Ohno H, Shimura K, Matsuoka M, Fujii N. Potent CXCR4 antagonists containing amidine type Peptide bond isosteres. ACS Med Chem Lett 2011; 2:477-80. [PMID: 24900333 DOI: 10.1021/ml200047e] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Accepted: 03/27/2011] [Indexed: 02/02/2023] Open
Abstract
A series of FC131 [cyclo(-d-Tyr-Arg-Arg-Nal-Gly-)] analogues containing amidine type peptide bond isosteres were synthesized as selective CXC chemokine receptor type 4 (CXCR4) antagonists. An isosteric amidine substructure was constructed by a macrocyclization process using nitrile oxide-mediated C-N bond formation. All of the amidine-containing FC131 analogues exhibited potent SDF-1 binding inhibition to CXCR4. The Nal-Gly-substituted analogue was characterized as one of the most potent cyclic pentapeptide-based CXCR4 antagonists reported to date. The improved activity against human immunodeficiency virus (HIV) type-1 X4 strains suggested that addition of another basic amidine group to the peptide backbone effectively increases the selective binding of the peptides to CXCR4 receptor.
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Affiliation(s)
- Eriko Inokuchi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Tatsuhiko Kubo
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kazuya Shimura
- Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masao Matsuoka
- Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Nobutaka Fujii
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Tamamura H, Tsutsumi H, Nomura W, Fujii N. Exploratory studies on development of the chemokine receptor CXCR4 antagonists toward downsizing. Perspect Medicin Chem 2008; 2:1-9. [PMID: 19787093 PMCID: PMC2746577 DOI: 10.4137/pmc.s422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Seven transmembrane (7TM) G-protein-coupled receptor (GPCR) families are important targets for drug discovery, and specific antagonists for GPCR can accelerate research in the field of medicinal chemistry. The chemokine receptor CXCR4 is a GPCR that possesses a unique ligand CXCL12/stromal cell-derived factor-1 (SDF-1). The interaction between CXCL12 and CXCR4 is essential for the migration of progenitor cells during embryonic development of the cardiovascular, hemopoietic and central nervous systems, and also involved in several intractable disease processes, including HIV infection, cancer cell metastasis, progression of acute and chronic leukemias, rheumatoid arthritis and pulmonary fibrosis. Thus, CXCR4 may be an important therapeutic target in all of these diseases, and various CXCR4 antagonists have been proposed as potential drugs. Fourteen-mer peptides, T140 and its analogs, and downsized cyclic pentapeptides have been developed by us as potent CXCR4 antagonists. This article describes the development of a number of specific CXCR4 antagonists in our laboratory, including downsizing.
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Affiliation(s)
- Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
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