1
|
Fujita Y, Fukuda Y, Sanuki F, Irei I, Monobe Y, Uno M, Akisada T, Shimoya K, Hara H, Moriya T. Protease-Activated Receptor 1 (PAR1) Expression Contributes to HPV-Associated Oropharyngeal Cancer Prognosis. Head Neck Pathol 2023; 17:658-672. [PMID: 37486532 PMCID: PMC10514014 DOI: 10.1007/s12105-023-01567-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 06/17/2023] [Indexed: 07/25/2023]
Abstract
BACKGROUND Human papillomavirus (HPV)-associated oropharyngeal cancer occasionally has a poor prognosis, making prognostic risk stratification crucial. Protease-activated receptor-1 (PAR1) is involved in carcinogenesis, and its expression is regulated by alpha-arrestin domain-containing protein 3 (ARRDC3). It is also involved in the tumor microenvironment. We sought to evaluate the predictive ability of PAR1, ARRDC3, and tumor-infiltrating lymphocyte (TIL) scores in patients with oropharyngeal, hypopharyngeal, and uterine cervical cancers, serving as comparators for HPV-associated oropharyngeal cancer. METHODS Immunohistochemical analysis of p16, ARRDC3, and PAR1 expression was performed on 79 oropharyngeal, 44 hypopharyngeal, and 42 uterine cervical cancer samples. The TIL scores were assessed and classified into the following groups based on invasion: low: 0-10%, medium: 20-40%, and high: > 50%. For prognostic analysis, the three groups were evaluated by dividing them into low, medium, and high categories, or alternatively into two groups using the median value as the cutoff. RESULTS p16 was expressed in 44 (56%) oropharyngeal, 8 (18%) hypopharyngeal, and all uterine cervical cancer samples. ARRDC3 was detected in 39 (49%) oropharyngeal, 25 (57%) hypopharyngeal, and 23 (55%) uterine cervical cancer samples. PAR1 was expressed in 45 (57%) oropharyngeal, 22 (50%) hypopharyngeal, and 22 (50%) uterine cervical cancer samples. Patients diagnosed with p16-positive oropharyngeal cancer had a substantially improved prognosis compared to those diagnosed with p16-negative cancer. The PAR1-negative cases had a considerably improved prognosis compared to the positive cases (disease-specific survival [DSS] and -negative cases (disease-free survival [DFS]). Multivariate analysis revealed that ARRDC3-positive cases had an appreciably better DSS prognosis than patients with p16-negative oropharyngeal cancers. PAR1-positive patients among patients with p16-positive oropharyngeal cancer had a poor prognosis. With respect to DFS, patients with PAR1-positive and p16-negative oropharyngeal cancer had a 35-fold higher recurrence rate than those with PAR1-negative and p16-negative oropharyngeal cancer. CONCLUSION Our results suggest that PAR1 expression affects the prognosis and recurrence rate of HPV-associated oropharyngeal cancer.
Collapse
Affiliation(s)
- Yoshinori Fujita
- Department of Pathology, Kawasaki Medical University, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan
- Department of Otolaryngology, Head and Neck Surgery, Kawasaki Medical University, Kurashiki, Okayama, Japan
| | - Yujiro Fukuda
- Department of Otolaryngology, Head and Neck Surgery, Kawasaki Medical University, Kurashiki, Okayama, Japan
| | - Fumiaki Sanuki
- Department of Pathology, Kawasaki Medical University, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan
| | - Isao Irei
- Department of Pathology, Kawasaki Medical University, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan
| | - Yasumasa Monobe
- Department of Pathology, Kawasaki Medical University, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan
| | - Masako Uno
- Department of Otolaryngology, Head and Neck Surgery, Kawasaki Medical University, Kurashiki, Okayama, Japan
| | - Takeshi Akisada
- Department of Otolaryngology, Head and Neck Surgery, Kawasaki Medical University, Kurashiki, Okayama, Japan
| | - Koichiro Shimoya
- Department of Obstetrics and Gynecology, Kawasaki Medical University, Kurashiki, Okayama, Japan
| | - Hirotaka Hara
- Department of Otolaryngology, Head and Neck Surgery, Kawasaki Medical University, Kurashiki, Okayama, Japan
| | - Takuya Moriya
- Department of Pathology, Kawasaki Medical University, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| |
Collapse
|
2
|
Tímár J, Honn KV, Hendrix MJC, Marko-Varga G, Jalkanen S. Newly identified form of phenotypic plasticity of cancer: immunogenic mimicry. Cancer Metastasis Rev 2023; 42:323-334. [PMID: 36754910 PMCID: PMC10014767 DOI: 10.1007/s10555-023-10087-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 01/18/2023] [Indexed: 02/10/2023]
Abstract
Cancer plasticity is now a recognized new hallmark of cancer which is due to disturbances of cell differentiation programs. It is manifested not only in various forms like the best-known epithelial-mesenchymal transition (EMT) but also in vasculogenic and megakaryocytic mimicries regulated by EMT-specific or less-specific transcription factors such as HIF1a or STAT1/2. Studies in the past decades provided ample data that cancer plasticity can be manifested also in the expression of a vast array of immune cell genes; best-known examples are PDL1/CD274, CD47, or IDO, and we termed it immunogenic mimicry (IGM). However, unlike other types of plasticities which are epigenetically regulated, expression of IGM genes are frequently due to gene amplifications. It is important that the majority of the IGM genes are regulated by interferons (IFNs) suggesting that their protein expressions are regulated by the immune microenvironment. Most of the IGM genes have been shown to be involved in immune escape of cancers broadening the repertoire of these mechanisms and offering novel targets for immunotherapeutics.
Collapse
Affiliation(s)
- József Tímár
- Department of Pathology, Forensic and Insurance Medicine, Semmelweis University, Budapest, Hungary.
| | - Kenneth V Honn
- Departments of Pathology, Oncology and Chemistry, Wayne State University, Detroit, MI, USA.,Barbara Ann Karmanos Cancer Institute, Detroit, MI, USA
| | - Mary J C Hendrix
- Department of Biology, Shepherd University, Shepherdstown, WV, USA
| | - György Marko-Varga
- Clinical Protein Science and Imaging, Biomedical Centre, Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Sirpa Jalkanen
- Medicity Research Laboratories, Turku, Finland.,InFLAMES Flagship, University of Turku, Turku, Finland
| |
Collapse
|
3
|
Protease-activated receptor 2 (PAR2)-targeting peptide derivatives for positron emission tomography (PET) imaging. Eur J Med Chem 2023; 246:114989. [PMID: 36527934 DOI: 10.1016/j.ejmech.2022.114989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/07/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022]
Abstract
The proteolytically-activated G protein-coupled receptor (GPCR) protease-activated receptor 2 (PAR2), is implicated in various cancers and inflammatory diseases. Synthetic ligands and in vitro imaging probes targeting this receptor have been developed with low nanomolar affinity, however, no in vivo imaging probes exist for PAR2. Here, we report the strategic design, synthesis, and biological evaluation of a series of novel 4-fluorobenzoylated PAR2-targeting peptides derived from 2f-LIGRLO-NH2 (2f-LI-) and Isox-Cha-Chg-Xaa-NH2 (Isox-) peptide families, where the 4-fluorobenzoyl moiety acts as the 19F-standard of an 18F-labeled probe for potential use in in vivo imaging. We found that several of the 4-fluorobenzoylated peptides from the 2f-LI-family exhibited PAR2 selectivity with moderate potency (EC50 = 151-252 nM), whereas several from the Isox-family exhibited PAR2 selectivity with high potency (EC50 = 13-42 nM). Our lead candidate, Isox-Cha-Chg-Ala-Arg-Dpr(4FB)-NH2 (EC50 = 13 nM), was successfully synthesized with fluorine-18 with a radiochemical yield of 37%, radiochemical purity of >98%, molar activity of 20 GBq/μmol, and an end of synthesis time of 125 min. Biodistribution studies and preliminary PET imaging of the tracer in mice showed predominantly renal clearance. This 18F-labeled tracer is the first reported PAR2 imaging agent with potential for use in vivo. Future work will explore the use of this tracer in cancer xenografts and inflammation models involving upregulation of PAR2 expression.
Collapse
|
4
|
Lee-Rivera I, López E, López-Colomé AM. Diversification of PAR signaling through receptor crosstalk. Cell Mol Biol Lett 2022; 27:77. [PMID: 36088291 PMCID: PMC9463773 DOI: 10.1186/s11658-022-00382-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 09/02/2022] [Indexed: 11/17/2022] Open
Abstract
Protease activated receptors (PARs) are among the first receptors shown to transactivate other receptors: noticeably, these interactions are not limited to members of the same family, but involve receptors as diverse as receptor kinases, prostanoid receptors, purinergic receptors and ionic channels among others. In this review, we will focus on the evidence for PAR interactions with members of their own family, as well as with other types of receptors. We will discuss recent evidence as well as what we consider as emerging areas to explore; from the signalling pathways triggered, to the physiological and pathological relevance of these interactions, since this additional level of molecular cross-talk between receptors and signaling pathways is only beginning to be explored and represents a novel mechanism providing diversity to receptor function and play important roles in physiology and disease.
Collapse
|
5
|
Sharp AK, Newman D, Libonate G, Borns-Stern M, Bevan DR, Brown AM, Anandakrishnan R. Biophysical insights into OR2T7: Investigation of a potential prognostic marker for glioblastoma. Biophys J 2022; 121:3706-3718. [PMID: 35538663 PMCID: PMC9617130 DOI: 10.1016/j.bpj.2022.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 04/18/2022] [Accepted: 05/05/2022] [Indexed: 11/21/2022] Open
Abstract
Glioblastoma multiforme (GBM) is the most aggressive and prevalent form of brain cancer, with an expected survival of 12-15 months following diagnosis. GBM affects the glial cells of the central nervous system, which impairs regular brain function including memory, hearing, and vision. GBM has virtually no long-term survival even with treatment, requiring novel strategies to understand disease progression. Here, we identified a somatic mutation in OR2T7, a G-protein-coupled receptor (GPCR), that correlates with reduced progression-free survival for glioblastoma (log rank p-value = 0.05), suggesting a possible role in tumor progression. The mutation, D125V, occurred in 10% of 396 glioblastoma samples in The Cancer Genome Atlas, but not in any of the 2504 DNA sequences in the 1000 Genomes Project, suggesting that the mutation may have a deleterious functional effect. In addition, transcriptome analysis showed that the p38α mitogen-activated protein kinase (MAPK), c-Fos, c-Jun, and JunB proto-oncogenes, and putative tumor suppressors RhoB and caspase-14 were underexpressed in glioblastoma samples with the D125V mutation (false discovery rate < 0.05). Molecular modeling and molecular dynamics simulations have provided preliminary structural insight and indicate a dynamic helical movement network that is influenced by the membrane-embedded, cytofacial-facing residue 125, demonstrating a possible obstruction of G-protein binding on the cytofacial exposed region. We show that the mutation impacts the "open" GPCR conformation, potentially affecting Gα-subunit binding and associated downstream activity. Overall, our findings suggest that the Val125 mutation in OR2T7 could affect glioblastoma progression by downregulating GPCR-p38 MAPK tumor-suppression pathways and impacting the biophysical characteristics of the structure that facilitates Gα-subunit binding. This study provides the theoretical basis for further experimental investigation required to confirm that the D125V mutation in OR2T7 is not a passenger mutation. With validation, the aforementioned mutation could represent an important prognostic marker and a potential therapeutic target for glioblastoma.
Collapse
Affiliation(s)
- Amanda K Sharp
- Interdisciplinary Program of Genetics, Bioinformatics, and Computational Biology (GBCB), Virginia Tech, Blacksburg, Virginia
| | - David Newman
- Biomedical Sciences, Edward Via College of Osteopathic Medicine (VCOM), Blacksburg, Virginia
| | - Gianna Libonate
- Biomedical Sciences, Edward Via College of Osteopathic Medicine (VCOM), Blacksburg, Virginia
| | - Mary Borns-Stern
- Biomedical Sciences, Edward Via College of Osteopathic Medicine (VCOM), Blacksburg, Virginia
| | - David R Bevan
- Interdisciplinary Program of Genetics, Bioinformatics, and Computational Biology (GBCB), Virginia Tech, Blacksburg, Virginia; Department of Biochemistry, Virginia Tech, Blacksburg, Virginia
| | - Anne M Brown
- Interdisciplinary Program of Genetics, Bioinformatics, and Computational Biology (GBCB), Virginia Tech, Blacksburg, Virginia; Department of Biochemistry, Virginia Tech, Blacksburg, Virginia; Research and Informatics, University Libraries, Virginia Tech, Blacksburg, Virginia.
| | - Ramu Anandakrishnan
- Biomedical Sciences, Edward Via College of Osteopathic Medicine (VCOM), Blacksburg, Virginia; Biomedical Science and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia; Gibbs Cancer Center and Research Institute, Spartanburg, South Carolina.
| |
Collapse
|
6
|
Ng TL, Tsui DCC, Wang S, Usari T, Patil T, Wilner K, Camidge DR. Association of anticoagulant use with clinical outcomes from crizotinib in ALK- and ROS1-rearranged advanced non-small cell lung cancers: A retrospective analysis of PROFILE 1001. Cancer Med 2022; 11:4422-4429. [PMID: 35510711 PMCID: PMC9741966 DOI: 10.1002/cam4.4789] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 04/11/2022] [Accepted: 04/17/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND ROS1- and ALK-rearranged advanced NSCLCs are associated with increased thromboembolic risk. We hypothesized that a prothrombotic phenotype offers an evolutionary advantage to subsets of these cancers. The impact of this phenotype could alter outcomes from targeted therapy. METHODS In a retrospective analysis of ROS1- and ALK-rearranged NSCLCs treated with crizotinib in a phase 1 trial, we compared progression-free survival (PFS) and objective response rate (ORR) based on the history of anticoagulation use (a possible surrogate of thromboembolism) at baseline (within 90 days before study enrollment) or within 90 days of study treatment. RESULTS Twelve out of 53 (22.6%) ROS1- and 39 out of 153 (25.5%) ALK-rearranged NSCLCs received anticoagulation before or during the trial. Most ROS1 and ALK patients on anticoagulation received low-molecular-weight heparin (75% and 64.1%, respectively). In the ROS1-rearranged group, the median PFS (95% CI) values were 5.1 (4.4-14.4) and 29.0 (16.5-48.8) months, and the ORR values were 41.7% (95% CI: 15.2 to 72.3) and 80.5% (95% CI: 65.1 to 91.2) among those with and without anticoagulation treatment, respectively. In the ALK-rearranged group, the median PFS (95% CI) was 7.1 (5.4-7.7) and 12.0 (9.4-18.3) months, and the ORR was 41% (95% CI: 25.6 to 57.9) and 74.3% (95% CI: 65.3 to 82.1) among those with and without anticoagulation, respectively. CONCLUSIONS Anticoagulation (as a potential surrogate of a prothrombotic subset) in ROS1- and ALK-rearranged NSCLCs may be associated with a lower PFS and ORR to crizotinib. CLINICALTRIAL gov: NCT00585195.
Collapse
Affiliation(s)
- Terry L. Ng
- Division of Medical Oncology, Department of MedicineUniversity of OttawaOttawaCanada
| | - David C. C. Tsui
- Division of Medical Oncology, Department of MedicineUniversity of Colorado School of MedicineAuroraColoradoUSA
| | | | | | - Tejas Patil
- Division of Medical Oncology, Department of MedicineUniversity of Colorado School of MedicineAuroraColoradoUSA
| | | | - David R. Camidge
- Division of Medical Oncology, Department of MedicineUniversity of Colorado School of MedicineAuroraColoradoUSA
| |
Collapse
|
7
|
Ruf W, Graf C. Coagulation signaling and cancer immunotherapy. Thromb Res 2021; 191 Suppl 1:S106-S111. [PMID: 32736766 DOI: 10.1016/s0049-3848(20)30406-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 11/06/2019] [Accepted: 11/18/2019] [Indexed: 12/13/2022]
Abstract
The last decades have delineated many interactions of the hemostatic system with cancer cells that are pivotal for cancer-associated thrombosis, angiogenesis and metastasis. Expanding evidence shows that platelets, the tissue factor pathway, and proteolytic signaling involving protease-activated receptors (PARs) are also central players in innate and adaptive immunity. Recent studies in immune-competent mice have uncovered new immune-evasive roles of coagulation signaling networks in the development and growth of different preclinical tumor models. Tumor-type specific PAR1 signaling facilitates the escape from immune surveillance by cytotoxic T cells. In addition, tumor-associated macrophages produce factor X (FX) and cell autonomous FXa-PAR2 signaling emerges as a central mechanism for tumor-promoting macrophage polarization in the tumor microenvironment. Pharmacological targeting of this signaling pathway with tissue penetrating oral FXa inhibitor reprograms macrophage phenotypes, enhances tumor antigen presentation, and expands tumor-killing cytotoxic lymphocytes. Importantly, by specifically targeting innate immune cells, the oral FXa inhibitor rivaroxaban synergizes with checkpoint inhibitor therapy in enhancing antigen-specific antitumor immunity. In similar experiments, anticoagulation with heparin is inefficient to block extravascular coagulation signaling. Thus, antithrombotic therapy with oral FXa inhibitors may contribute to reversing tumor immune-evasive mechanisms and enhance the clinical outcome of targeted immuno-therapy regimens.
Collapse
Affiliation(s)
- Wolfram Ruf
- Center for Thrombosis and Hemostasis, Johannes Gutenberg University Medical Center, Mainz, Germany; Department of Immunology and Microbiology, Scripps Research, La Jolla, CA, USA.
| | - Claudine Graf
- Center for Thrombosis and Hemostasis, Johannes Gutenberg University Medical Center, Mainz, Germany
| |
Collapse
|
8
|
Tissue factor pathway inhibitor primes monocytes for antiphospholipid antibody-induced thrombosis. Blood 2019; 134:1119-1131. [PMID: 31434703 DOI: 10.1182/blood.2019001530] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 08/06/2019] [Indexed: 12/28/2022] Open
Abstract
Antiphospholipid antibodies (aPLs) with complex lipid and/or protein reactivities cause complement-dependent thrombosis and pregnancy complications. Although cross-reactivities with coagulation regulatory proteins contribute to the risk for developing thrombosis in patients with antiphospholipid syndrome, the majority of pathogenic aPLs retain reactivity with membrane lipid components and rapidly induce reactive oxygen species-dependent proinflammatory signaling and tissue factor (TF) procoagulant activation. Here, we show that lipid-reactive aPLs activate a common species-conserved TF signaling pathway. aPLs dissociate an inhibited TF coagulation initiation complex on the cell surface of monocytes, thereby liberating factor Xa for thrombin generation and protease activated receptor 1/2 heterodimer signaling. In addition to proteolytic signaling, aPLs promote complement- and protein disulfide isomerase-dependent TF-integrin β1 trafficking that translocates aPLs and NADPH oxidase to the endosome. Cell surface TF pathway inhibitor (TFPI) synthesized by monocytes is required for TF inhibition, and disabling TFPI prevents aPL signaling, indicating a paradoxical prothrombotic role for TFPI. Myeloid cell-specific TFPI inactivation has no effect on models of arterial or venous thrombus development, but remarkably prevents experimental aPL-induced thrombosis in mice. Thus, the physiological control of TF primes monocytes for rapid aPL pathogenic signaling and thrombosis amplification in an unexpected crosstalk between complement activation and coagulation signaling.
Collapse
|
9
|
MALT1 is a critical mediator of PAR1-driven NF-κB activation and metastasis in multiple tumor types. Oncogene 2019; 38:7384-7398. [PMID: 31420608 DOI: 10.1038/s41388-019-0958-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 04/29/2019] [Accepted: 06/07/2019] [Indexed: 01/15/2023]
Abstract
Protease-activated receptor 1 (PAR1), a thrombin-responsive G protein-coupled receptor (GPCR), is implicated in promoting metastasis in multiple tumor types, including both sarcomas and carcinomas, but the molecular mechanisms responsible remain largely unknown. We previously discovered that PAR1 stimulation in endothelial cells leads to activation of NF-κB, mediated by a protein complex comprised of CARMA3, Bcl10, and the MALT1 effector protein (CBM complex). Given the strong association between NF-κB and metastasis, we hypothesized that this CBM complex could play a critical role in the PAR1-driven metastatic progression of specific solid tumors. In support of our hypothesis, we demonstrate that PAR1 stimulation results in NF-κB activation in both osteosarcoma and breast cancer, which is suppressed by siRNA-mediated MALT1 knockdown, suggesting that an intact CBM complex is required for the response in both tumor cell types. We identify several metastasis-associated genes that are upregulated in a MALT1-dependent manner after PAR1 stimulation in cancer cells, including those encoding the matrix remodeling protein, MMP9, and the cytokines, IL-1β and IL-8. Further, exogenous expression of PAR1 in MCF7 breast cancer cells confers highly invasive and metastatic behavior which can be blocked by CRISPR/Cas9-mediated MALT1 knockout. Importantly, we find that PAR1 stimulation induces MALT1 protease activity in both osteosarcoma and breast cancer cells, an activity that is mechanistically linked to NF-κB activation and potentially other responses associated with aggressive phenotype. Several small molecule MALT1 protease inhibitors have recently been described that could therefore represent promising new therapeutics for the prevention and/or treatment of PAR1-driven tumor metastasis.
Collapse
|
10
|
LeSarge JC, Thibeault P, Milne M, Ramachandran R, Luyt LG. High Affinity Fluorescent Probe for Proteinase-Activated Receptor 2 (PAR2). ACS Med Chem Lett 2019; 10:1045-1050. [PMID: 31312406 DOI: 10.1021/acsmedchemlett.9b00094] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 06/06/2019] [Indexed: 12/22/2022] Open
Abstract
PAR2 is a proteolytically activated G protein-coupled receptor (GPCR) that is implicated in various cancers and inflammatory diseases. Ligands with low nanomolar affinity for PAR2 have been developed, but there is a paucity of research on the development of PAR2-targeting imaging probes. Here, we report the development of seven novel PAR2-targeting compounds. Four of these compounds are highly potent and selective PAR2-targeting peptides (EC50 = 10 to 23 nM) that have a primary amine handle available for facile conjugation to various imaging components. We describe a peptide of the sequence Isox-Cha-Chg-ARK(Sulfo-Cy5)-NH2 as the most potent and highest affinity PAR2-selective fluorescent probe reported to date (EC50 = 16 nM, K D = 38 nM). This compound has a greater than 10-fold increase in potency and binding affinity for PAR2 compared to the leading previously reported probe and is conjugated to a red-shifted fluorophore, enabling in vitro and in vivo studies.
Collapse
Affiliation(s)
| | | | - Mark Milne
- London Regional Cancer Program, Lawson Health Research Institute, 800 Commissioners Road East, London, Ontario N6A 5W9, Canada
| | | | - Leonard G. Luyt
- London Regional Cancer Program, Lawson Health Research Institute, 800 Commissioners Road East, London, Ontario N6A 5W9, Canada
| |
Collapse
|
11
|
Heuberger DM, Schuepbach RA. Protease-activated receptors (PARs): mechanisms of action and potential therapeutic modulators in PAR-driven inflammatory diseases. Thromb J 2019; 17:4. [PMID: 30976204 PMCID: PMC6440139 DOI: 10.1186/s12959-019-0194-8] [Citation(s) in RCA: 172] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 03/08/2019] [Indexed: 12/29/2022] Open
Abstract
Inflammatory diseases have become increasingly prevalent with industrialization. To address this, numerous anti-inflammatory agents and molecular targets have been considered in clinical trials. Among molecular targets, protease-activated receptors (PARs) are abundantly recognized for their roles in the development of chronic inflammatory diseases. In particular, several inflammatory effects are directly mediated by the sensing of proteolytic activity by PARs. PARs belong to the seven transmembrane domain G protein-coupled receptor family, but are unique in their lack of physiologically soluble ligands. In contrast with classical receptors, PARs are activated by N-terminal proteolytic cleavage. Upon removal of specific N-terminal peptides, the resulting N-termini serve as tethered activation ligands that interact with the extracellular loop 2 domain and initiate receptor signaling. In the classical pathway, activated receptors mediate signaling by recruiting G proteins. However, activation of PARs alternatively lead to the transactivation of and signaling through receptors such as co-localized PARs, ion channels, and toll-like receptors. In this review we consider PARs and their modulators as potential therapeutic agents, and summarize the current understanding of PAR functions from clinical and in vitro studies of PAR-related inflammation.
Collapse
Affiliation(s)
- Dorothea M Heuberger
- Institute of Intensive Care Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland.,Surgical Research Division, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Reto A Schuepbach
- Institute of Intensive Care Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| |
Collapse
|
12
|
Heuberger DM, Franchini AG, Madon J, Schuepbach RA. Thrombin cleaves and activates the protease-activated receptor 2 dependent on thrombomodulin co-receptor availability. Thromb Res 2019; 177:91-101. [PMID: 30861432 DOI: 10.1016/j.thromres.2019.02.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 12/14/2018] [Accepted: 02/26/2019] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Protease-activated receptors (PARs) evolved to react to extracellular proteolytic activity. In mammals, three of the four PARs (PAR1, PAR3, and PAR4) that are expressed respond to the prototypical procoagulant enzyme thrombin, whereas PAR2 was assumed to resist activation by thrombin. To date, involvement of cell surface thrombin-recruiting co-receptors such as thrombomodulin (TM), which potentially facilitates PAR2 cleavage, has not been addressed. Thus, we examined whether TM-bound thrombin cleaved PAR2 and tested biological responses such as nuclear factor kappa B (NF-κB) DNA binding activity and cytokine release. MATERIALS AND METHODS We examined 293T cells overexpressing PAR2 and TM for thrombin recruitment by TM promoting PAR2 cleavage. To test for the TM-thrombin interactions required for PAR2 cleavage and to map cleavage sites on PAR2, mutant constructs of TM or PAR2 were engineered. Biological effects because of PAR2 activation were investigated using an NF-κB reporter system and cytokine release. RESULTS AND CONCLUSIONS We identified that, at low to moderate concentrations, thrombin cleaved PAR2 in a TM co-receptor-dependent manner with cleavage efficiency comparable to that of trypsin. In TM's presence, thrombin efficiently cleaved both, PAR1 and PAR2, albeit kinetics differed. Whereas the majority of surface expressed PAR1 was immediately cleaved off, prolonged exposure to thrombin resulted in few additional cleavage. In contrast, PAR2 cleavage was sustained upon prolonged exposure to thrombin. However, TM EGF-like domain 5 was required and TM chondroitin sulfate (CS) proteoglycan sites serine 490 and serine 492 assisted in PAR2 cleavage, while thrombin preferentially cleaved at arginine 36 on PAR2's N-terminus. Note that thrombin-induced activation of NF-κB via PAR2 resulted in release of interleukin-8. Thus, we provide a novel concept of how thrombin efficiently cleaves PAR2 in a TM-dependent manner, resulting in pro-inflammatory interleukin-8 release. This unexpected pro-inflammatory role of TM, promoting cleavage and activation of PAR2 by thrombin, may lead to novel therapeutic options for treating inflammatory and malignant diseases.
Collapse
Affiliation(s)
- Dorothea M Heuberger
- Institute of Intensive Care Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland; Surgical Research Division, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Alessandro G Franchini
- Institute of Intensive Care Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Jerzy Madon
- Institute of Intensive Care Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Reto A Schuepbach
- Institute of Intensive Care Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
| |
Collapse
|
13
|
Majewski MW, Gandhi DM, Rosas R, Kodali R, Arnold LA, Dockendorff C. Design and Evaluation of Heterobivalent PAR1-PAR2 Ligands as Antagonists of Calcium Mobilization. ACS Med Chem Lett 2019; 10:121-126. [PMID: 30655958 DOI: 10.1021/acsmedchemlett.8b00538] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 12/03/2018] [Indexed: 12/28/2022] Open
Abstract
A novel class of bivalent ligands targeting putative protease-activated receptor (PAR) heteromers has been prepared based upon reported antagonists for the subtypes PAR1 and PAR2. Modified versions of the PAR1 antagonist RWJ-58259 containing alkyne adapters were connected via cycloaddition reactions to azide-capped polyethylene glycol (PEG) spacers attached to imidazopyridazine-based PAR2 antagonists. Initial studies of the PAR1-PAR2 antagonists indicated that they inhibited G alpha q-mediated calcium mobilization in endothelial and cancer cells driven by both PAR1 and PAR2 agonists. Compounds of this novel class hold promise for the prevention of restenosis, cancer cell metastasis, and other proliferative disorders.
Collapse
Affiliation(s)
- Mark W. Majewski
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Disha M. Gandhi
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Ricardo Rosas
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Revathi Kodali
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin, Milwaukee, Wisconsin 53211, United States
| | - Leggy A. Arnold
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin, Milwaukee, Wisconsin 53211, United States
| | - Chris Dockendorff
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| |
Collapse
|
14
|
Pawar NR, Buzza MS, Antalis TM. Membrane-Anchored Serine Proteases and Protease-Activated Receptor-2-Mediated Signaling: Co-Conspirators in Cancer Progression. Cancer Res 2019; 79:301-310. [PMID: 30610085 DOI: 10.1158/0008-5472.can-18-1745] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 10/12/2018] [Accepted: 11/07/2018] [Indexed: 12/18/2022]
Abstract
Pericellular proteolysis provides a significant advantage to developing tumors through the ability to remodel the extracellular matrix, promote cell invasion and migration, and facilitate angiogenesis. Recent advances demonstrate that pericellular proteases can also communicate directly to cells by activation of a unique group of transmembrane G-protein-coupled receptors (GPCR) known as protease-activated receptors (PAR). In this review, we discuss the specific roles of one of four mammalian PARs, namely PAR-2, which is overexpressed in advanced stage tumors and is activated by trypsin-like serine proteases that are highly expressed or otherwise dysregulated in many cancers. We highlight recent insights into the ability of different protease agonists to bias PAR-2 signaling and the newly emerging evidence for an interplay between PAR-2 and membrane-anchored serine proteases, which may co-conspire to promote tumor progression and metastasis. Interfering with these pathways might provide unique opportunities for the development of new mechanism-based strategies for the treatment of advanced and metastatic cancers.
Collapse
Affiliation(s)
- Nisha R Pawar
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, Maryland.,Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland
| | - Marguerite S Buzza
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, Maryland.,Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland.,University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| | - Toni M Antalis
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, Maryland. .,Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland.,University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| |
Collapse
|
15
|
Adams GN, Sharma BK, Rosenfeldt L, Frederick M, Flick MJ, Witte DP, Mosnier LO, Harmel-Laws E, Steinbrecher KA, Palumbo JS. Protease-activated receptor-1 impedes prostate and intestinal tumor progression in mice. J Thromb Haemost 2018; 16:2258-2269. [PMID: 30152921 PMCID: PMC6214773 DOI: 10.1111/jth.14277] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Indexed: 12/28/2022]
Abstract
Essentials Protease activated receptor-1 (PAR-1) has been proposed to drive cancer progression. Surprisingly, PAR-1 deletion accelerated tumor progression in two distinct experimental settings. PAR-1 deletion was shown to limit the apoptosis of transformed epithelial cells. Thrombin- and activated protein C-mediated PAR-1 activation have unique effects on tumor cell biology. SUMMARY: Background Multiple studies have implicated protease-activated receptor-1 (PAR-1), a G-protein-coupled receptor activated by proteolytic cleavage of its N-terminus, as one target coupling thrombin-mediated proteolysis to tumor progression. Objective To analyze the role of PAR-1 in the setting of two distinct spontaneously developing tumor models in mice. Methods We interbred PAR-1-deficient mice with Transgenic Adenocarcinoma of the Mouse Prostate (TRAMP) mice, which spontaneously develop prostate tumors, and adenomatous polyposis coli Min (APCMin/+ ) mice, which spontaneously develop intestinal adenomas. Results Analyses of TRAMP mice with advanced disease (30 weeks) revealed that PAR-1 deficiency resulted in significantly larger and more aggressive prostate tumors. Prostates collected at an earlier time point (12 weeks of age) revealed that PAR-1 promotes apoptosis in transformed epithelia. In vitro analyses of TRAMP-derived cells revealed that activated protein C-mediated PAR-1 cleavage can induce tumor cell apoptosis, suggesting that tumor cell-intrinsic PAR-1 functions can limit tumor progression. Paralleling results in TRAMP mice, PAR-1-deficient APCMin/+ mice developed three-fold more adenomas than PAR-1-expressing mice, and the adenomas that formed were significantly larger. Moreover, loss of PAR-1 expression was shown to limit apoptosis in transformed intestinal epithelial cells. Conclusions Together, these results demonstrate a previously unrecognized role for PAR-1 in impeding tumor progression in vivo. These results also offer a cautionary note suggesting that long-term PAR-1 inhibition could increase malignancy risk in some contexts.
Collapse
Affiliation(s)
- Gregory N. Adams
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | - Bal Krishan Sharma
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | - Leah Rosenfeldt
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | - Malinda Frederick
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | - Matthew J. Flick
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | - David P. Witte
- Department of Pathology, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | | | - Eleana Harmel-Laws
- Division of Gastroenterology, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | - Kris A. Steinbrecher
- Division of Gastroenterology, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| | - Joseph S. Palumbo
- Cancer and Blood Diseases Institute, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine
| |
Collapse
|
16
|
Molecular targeting of breast and colon cancer cells by PAR1 mediated apoptosis through a novel pro-apoptotic peptide. Apoptosis 2018; 23:679-694. [DOI: 10.1007/s10495-018-1485-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
17
|
Al Saleh HA, Haas-Neill S, Al-Hashimi A, Kapoor A, Shayegan B, Austin RC, Al-Nedawi K. Thrombotic characteristics of extracellular vesicles derived from prostate cancer cells. Prostate 2018; 78:953-961. [PMID: 29761522 DOI: 10.1002/pros.23653] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 05/01/2018] [Indexed: 11/11/2022]
Abstract
BACKGROUND Prostate cancer (PC) patients in advanced stages of the disease have high risk of blood coagulation complications. The procoagulant molecule Tissue factor (TF), and the fibrinolysis inhibitor plasminogen activator inhibitor-1 PAI-1 play important role in this complication. Extracellular vesicles (EV) shed from cancer cells may contribute to the regulation of TF and PAI-1. The procoagulant activity of EV can be associated with the oncogenic and metastatic characteristics of their cells. METHODS We have expressed EGFRvIII in DU145 cells to assess the role of this oncogene in the procoagulant activity of EV. The intercellular exchange of TF via EV was assessed by downregulating its expression in DU145 cells using shRNA vector, and determining the transfer of TF via EV enriched with the protein. Two PC cell lines with different metastatic potential were used to assess the correlation between the procoagulant activity of EV and the metastatic potential of PC cells. Photometric assays were used to determine FXa-activity and thrombin generation as indicators for the procoagulant activity of EV. Double-tagged proteinase-activated receptor 1(PAR-1) expressed in CHO cells to assess its activation by EV. RESULTS The expression of EGFRvIII in DU145 cells led to increased mRNA levels for TF and PAI-1, but the increase in these proteins expression was detected mostly in the EV. EV with enhanced levels of TF protein conferred higher TF procoagulant activity on the acceptor cells by intercellular exchange of this protein. Procoagulant activity of EV, assessed by FXa activity, and thrombin generation, was correlated with the oncogenic and metastatic potential of PC cells. The ability of EV to generate thrombin led to the activation of PAR-1, which was evident by the truncation of tagged-PAR-1. CONCLUSION The active oncogene EGFRvIII increases the concentration of TF and PAI-1 in EV. The procoagulant activity of EV is associated with the oncogenic and metastatic characteristics of their PC cells. Also, EV may contribute to the high procoagulant activity in the tumour microenvironment by the intercellular exchange of TF. Finally, through the generation of thrombin, EV can activate PAR-1, which evidently contributes to cancer progression, linking the coagulation system to tumor progression.
Collapse
Affiliation(s)
- Hassan A Al Saleh
- Division of Nephrology, Department of Medicine, McMaster University, Hamilton, Canada
| | - Sandor Haas-Neill
- Division of Nephrology, Department of Medicine, McMaster University, Hamilton, Canada
| | - Ali Al-Hashimi
- Division of Nephrology, Department of Medicine, McMaster University, Hamilton, Canada
| | - Anil Kapoor
- Division of Urology, Department of Surgery, McMaster University, Hamilton, Canada
| | - Bobby Shayegan
- Division of Urology, Department of Surgery, McMaster University, Hamilton, Canada
| | - Richard C Austin
- Division of Nephrology, Department of Medicine, McMaster University, Hamilton, Canada
| | - Khalid Al-Nedawi
- Division of Nephrology, Department of Medicine, McMaster University, Hamilton, Canada
| |
Collapse
|
18
|
Antoniak S, Tatsumi K, Schmedes CM, Grover SP, Pawlinski R, Mackman N. Protease-activated receptor 1 activation enhances doxorubicin-induced cardiotoxicity. J Mol Cell Cardiol 2018; 122:80-87. [PMID: 30098988 DOI: 10.1016/j.yjmcc.2018.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 08/07/2018] [Accepted: 08/09/2018] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The anti-cancer anthracycline drug Doxorubicin (Dox) causes cardiotoxicity. We investigated the role of protease-activated receptor 1 (PAR-1) in Dox-induced cardiotoxicity. METHODS AND RESULTS In vitro experiments revealed that PAR-1 enhanced Dox-induced mitochondrial dysfunction, reactive oxygen species and cell death of cardiac myocytes and cardiac fibroblasts. The contribution of PAR-1 to Dox-induced cardiotoxicity was investigated by subjecting PAR-1-/- mice and PAR-1+/+ mice to acute and chronic exposure to Dox. Heart function was measured by echocardiography. PAR-1-/- mice exhibited significant less cardiac injury and dysfunction compared to PAR-1+/+ mice after acute and chronic Dox administration. PAR-1-/- mice had reduced levels of nitrotyrosine, apoptosis and inflammation in their heart compared to PAR-1+/+ mice. Furthermore, inhibition of PAR-1 in wild-type mice with vorapaxar significantly reduced the acute Dox-induced cardiotoxicity. CONCLUSION Our results indicate that activation of PAR-1 contributes to Dox-induced cardiotoxicity. Inhibition of PAR-1 may be a new approach to reduce Dox-induced cardiotoxicity in cancer patients.
Collapse
Affiliation(s)
- Silvio Antoniak
- Department of Medicine, Thrombosis and Hemostasis Program, Division of Hematology and Oncology, UNC McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, United States; Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
| | - Kohei Tatsumi
- Department of Medicine, Thrombosis and Hemostasis Program, Division of Hematology and Oncology, UNC McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, United States; Department of Physiology and Regenerative Medicine, Kindai University, Faculty of Medicine, Osaka-sayama, Osaka, Japan
| | - Clare M Schmedes
- Department of Medicine, Thrombosis and Hemostasis Program, Division of Hematology and Oncology, UNC McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, United States
| | - Steven P Grover
- Department of Medicine, Thrombosis and Hemostasis Program, Division of Hematology and Oncology, UNC McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, United States
| | - Rafal Pawlinski
- Department of Medicine, Thrombosis and Hemostasis Program, Division of Hematology and Oncology, UNC McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, United States
| | - Nigel Mackman
- Department of Medicine, Thrombosis and Hemostasis Program, Division of Hematology and Oncology, UNC McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, United States
| |
Collapse
|
19
|
Arakaki AKS, Pan WA, Trejo J. GPCRs in Cancer: Protease-Activated Receptors, Endocytic Adaptors and Signaling. Int J Mol Sci 2018; 19:ijms19071886. [PMID: 29954076 PMCID: PMC6073120 DOI: 10.3390/ijms19071886] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 06/20/2018] [Accepted: 06/21/2018] [Indexed: 01/06/2023] Open
Abstract
G protein-coupled receptors (GPCRs) are a large diverse family of cell surface signaling receptors implicated in various types of cancers. Several studies indicate that GPCRs control many aspects of cancer progression including tumor growth, invasion, migration, survival and metastasis. While it is known that GPCR activity can be altered in cancer through aberrant overexpression, gain-of-function activating mutations, and increased production and secretion of agonists, the precise mechanisms of how GPCRs contribute to cancer progression remains elusive. Protease-activated receptors (PARs) are a unique class of GPCRs implicated in cancer. PARs are a subfamily of GPCRs comprised of four members that are irreversibly activated by proteolytic cleavage induced by various proteases generated in the tumor microenvironment. Given the unusual proteolytic irreversible activation of PARs, expression of receptors at the cell surface is a key feature that influences signaling responses and is exquisitely controlled by endocytic adaptor proteins. Here, we discuss new survey data from the Cancer Genome Atlas and the Genotype-Tissue Expression projects analysis of expression of all PAR family member expression in human tumor samples as well as the role and function of the endocytic sorting machinery that controls PAR expression and signaling of PARs in normal cells and in cancer.
Collapse
Affiliation(s)
- Aleena K S Arakaki
- Biomedical Sciences Graduate Program, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA.
- Department of Pharmacology, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA.
| | - Wen-An Pan
- Department of Pharmacology, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA.
| | - JoAnn Trejo
- Department of Pharmacology, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA.
| |
Collapse
|
20
|
Jiang P, De Li S, Li ZG, Zhu YC, Yi XJ, Li SM. The expression of protease-activated receptors in esophageal carcinoma cells: the relationship between changes in gene expression and cell proliferation, apoptosis in vitro and growing ability in vivo. Cancer Cell Int 2018; 18:81. [PMID: 29977156 PMCID: PMC5992767 DOI: 10.1186/s12935-018-0577-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Accepted: 05/31/2018] [Indexed: 12/25/2022] Open
Abstract
Background Protease-activated receptors (PARs) are a family of four G protein-coupled receptors expressed widely in many types of cells. PAR1, 2, and 4 have been shown to play an important role in many of the physiological activities of cells and many types of cancer cells. Esophageal carcinoma has become the fourth most common clinically diagnosed cancer and one of the top three leading causes of cancer-related deaths in China. The functions and expression patterns of PAR1, 2, and 4 in esophageal carcinoma have not published previously. Methods Here, we systematically studied the expression of PAR1, 2, and 4 in clinical esophageal carcinoma patients and determined their role in esophageal carcinoma in vivo and in vitro through the overexpression or knockdown of PAR1, 2, and 4. Results We found that the expression of PAR1 and 2 expressed higher in esophageal carcinoma than in the paracarcinoma tissues on clinical patients. PAR1 and 2 enhanced cell proliferation both in vivo and in vitro and reduced apoptosis to strengthen cancer cell vitality in TE-1 cells. In contrast, the expression of PAR4 expressed decreased in esophageal carcinoma, and its expression induced apoptosis in vivo and vitro. Conclusion In our previous studies and the present study, we noted that the expression of PAR1, 2, and 4 was almost absent in different stages of esophageal carcinoma. PAR1 and 2 might be potential molecular markers for esophageal carcinoma, and PAR4 might be an effective treatment target for esophageal carcinoma prevention and treatment.
Collapse
Affiliation(s)
- Ping Jiang
- 1Department of Pathology, Kunming Medical University, Kunming, 650500 Yunnan China
| | - Shu De Li
- 2Department of Biochemistry and Molecular Biology, Kunming Medical University, Kunming, 650500 Yunnan China
| | - Zhi Gang Li
- 2Department of Biochemistry and Molecular Biology, Kunming Medical University, Kunming, 650500 Yunnan China
| | - Yue Chun Zhu
- 2Department of Biochemistry and Molecular Biology, Kunming Medical University, Kunming, 650500 Yunnan China
| | - Xiao Jia Yi
- 3Department of Pathology, Second Affiliated Hospital of Kunming Medical University, Kunming, 650000 China
| | - Si Man Li
- 2Department of Biochemistry and Molecular Biology, Kunming Medical University, Kunming, 650500 Yunnan China
| |
Collapse
|
21
|
Signaling Crosstalk of TGF-β/ALK5 and PAR2/PAR1: A Complex Regulatory Network Controlling Fibrosis and Cancer. Int J Mol Sci 2018; 19:ijms19061568. [PMID: 29795022 PMCID: PMC6032192 DOI: 10.3390/ijms19061568] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/09/2018] [Accepted: 05/14/2018] [Indexed: 02/07/2023] Open
Abstract
Both signaling by transforming growth factor-β (TGF-β) and agonists of the G Protein-coupled receptors proteinase-activated receptor-1 (PAR1) and -2 (PAR2) have been linked to tissue fibrosis and cancer. Intriguingly, TGF-β and PAR signaling either converge on the regulation of certain matrix genes overexpressed in these pathologies or display mutual regulation of their signaling components, which is mediated in part through sphingosine kinases and sphingosine-1-phosphate and indicative of an intimate signaling crosstalk between the two pathways. In the first part of this review, we summarize the various regulatory interactions that have been discovered so far according to the organ/tissue in which they were described. In the second part, we highlight the types of signaling crosstalk between TGF-β on the one hand and PAR2/PAR1 on the other hand. Both ligand–receptor systems interact at various levels and by several mechanisms including mutual regulation of ligand–ligand, ligand–receptor, and receptor–receptor at the transcriptional, post-transcriptional, and receptor transactivation levels. These mutual interactions between PAR2/PAR1 and TGF-β signaling components eventually result in feed-forward loops/vicious cycles of matrix deposition and malignant traits that exacerbate fibrosis and oncogenesis, respectively. Given the crucial role of PAR2 and PAR1 in controlling TGF-β receptor activation, signaling, TGF-β synthesis and bioactivation, combining PAR inhibitors with TGF-β blocking agents may turn out to be more efficient than targeting TGF-β alone in alleviating unwanted TGF-β-dependent responses but retaining the beneficial ones.
Collapse
|
22
|
Cancer microvesicles induce tissue factor-related procoagulant activity in endothelial cells in vitro. Blood Coagul Fibrinolysis 2018; 28:365-372. [PMID: 27841803 DOI: 10.1097/mbc.0000000000000607] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
: Microvesicles associated with tissue factor (TF) may play a role in cancer-related venous thromboembolism; however, not much is known about their interaction with the tumour stroma, especially the endothelium or any procoagulant changes seen because of this interaction. Using a head and neck squamous cell carcinoma line (UMSCC81B) and human umbilical vein endothelial cells (HUVECs), this study explored the interaction of cancer microvesicles released into cell culture media with endothelial cells in vitro, and assessed the procoagulant activity resulting from this interaction. Cell-free media containing UMSCC81B cancer microvesicles supported coagulation in a concentration-dependent manner, suggesting TF and microvesicle presence, this media was then added to HUVECs and flow cytometry analysis showed a subpopulation of HUVECs that had acquired a significantly high expression of TF, which was dependent upon the concentration of UMSCC81B media containing microvesicles present and confocal microscopy confirmed HUVECs associated with labelled microvesicles. The range of TF-positive HUVECs was determined to be 0, 4.2(±1.4), 12.5(±3.72), and 45.9(±18.7)% for microvesicle-positive media concentration of 0, 25, 50, and 100%, respectively, which resulted in decreasing prothrombin values of more than 600 (no clot), 126.4, 65.8, and 47.8 s. Our results demonstrate that procoagulant microvesicles shed by UMSCC81B induced a procoagulant effect in HUVECs through increased clotting activity and cell membrane surface expression of TF.
Collapse
|
23
|
IL-1 β-Induced Matrix Metalloprotease-1 Promotes Mesenchymal Stem Cell Migration via PAR1 and G-Protein-Coupled Signaling Pathway. Stem Cells Int 2018; 2018:3524759. [PMID: 30026761 PMCID: PMC6031215 DOI: 10.1155/2018/3524759] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 11/19/2017] [Accepted: 12/28/2017] [Indexed: 01/01/2023] Open
Abstract
Mesenchymal stem cells (MSCs) are known for homing to sites of injury in response to signals of cellular damage. However, the mechanisms of how cytokines recruit stem cells to target tissue are still unclear. In this study, we found that the proinflammation cytokine interleukin-1β (IL-1β) promotes mesenchymal stem cell migration. The cDNA microarray data show that IL-1β induces matrix metalloproteinase-1 (MMP-1) expression. We then used quantitative real-time PCR and MMP-1 ELISA to verify the results. MMP-1 siRNA transfected MSCs, and MSC pretreatment with IL-1β inhibitor interleukin-1 receptor antagonist (IL-1RA), MMP tissue inhibitor of metalloproteinase 1 (TIMP1), tissue inhibitor of metalloproteinase 2 (TIMP2), MMP-1 inhibitor GM6001, and protease-activated receptor 1 (PAR1) inhibitor SCH79797 confirms that PAR1 protein signaling pathway leads to IL-1β-induced cell migration. In conclusion, IL-1β promotes the secretion of MMP-1, which then activates the PAR1 and G-protein-coupled signal pathways to promote mesenchymal stem cell migration.
Collapse
|
24
|
Rothmeier AS, Liu E, Chakrabarty S, Disse J, Mueller BM, Østergaard H, Ruf W. Identification of the integrin-binding site on coagulation factor VIIa required for proangiogenic PAR2 signaling. Blood 2018; 131:674-685. [PMID: 29246902 PMCID: PMC5805488 DOI: 10.1182/blood-2017-02-768218] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 12/12/2017] [Indexed: 12/14/2022] Open
Abstract
The tissue factor (TF) pathway serves both hemostasis and cell signaling, but how cells control these divergent functions of TF remains incompletely understood. TF is the receptor and scaffold of coagulation proteases cleaving protease-activated receptor 2 (PAR2) that plays pivotal roles in angiogenesis and tumor development. Here we demonstrate that coagulation factor VIIa (FVIIa) elicits TF cytoplasmic domain-dependent proangiogenic cell signaling independent of the alternative PAR2 activator matriptase. We identify a Lys-Gly-Glu (KGE) integrin-binding motif in the FVIIa protease domain that is required for association of the TF-FVIIa complex with the active conformer of integrin β1. A point mutation in this motif markedly reduces TF-FVIIa association with integrins, attenuates integrin translocation into early endosomes, and reduces delayed mitogen-activated protein kinase phosphorylation required for the induction of proangiogenic cytokines. Pharmacologic or genetic blockade of the small GTPase ADP-ribosylation factor 6 (arf6) that regulates integrin trafficking increases availability of TF-FVIIa with procoagulant activity on the cell surface, while inhibiting TF-FVIIa signaling that leads to proangiogenic cytokine expression and tumor cell migration. These experiments delineate the structural basis for the crosstalk of the TF-FVIIa complex with integrin trafficking and suggest a crucial role for endosomal PAR2 signaling in pathways of tissue repair and tumor biology.
Collapse
Affiliation(s)
- Andrea S Rothmeier
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Enbo Liu
- San Diego Biomedical Research Institute, San Diego, CA
| | - Sagarika Chakrabarty
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Jennifer Disse
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | | | | | - Wolfram Ruf
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
- Center for Thrombosis and Hemostasis, Johannes Gutenberg University Medical Center, Mainz, Germany
| |
Collapse
|
25
|
Arakaki AKS, Pan WA, Lin H, Trejo J. The α-arrestin ARRDC3 suppresses breast carcinoma invasion by regulating G protein-coupled receptor lysosomal sorting and signaling. J Biol Chem 2018; 293:3350-3362. [PMID: 29348172 DOI: 10.1074/jbc.ra117.001516] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 01/16/2018] [Indexed: 12/17/2022] Open
Abstract
Aberrant G protein-coupled receptor (GPCR) expression and activation has been linked to tumor initiation, progression, invasion, and metastasis. However, compared with other cancer drivers, the exploitation of GPCRs as potential therapeutic targets has been largely ignored, despite the fact that GPCRs are highly druggable. Therefore, to advance the potential status of GPCRs as therapeutic targets, it is important to understand how GPCRs function together with other cancer drivers during tumor progression. We now report that the α-arrestin domain-containing protein-3 (ARRDC3) acts as a tumor suppressor in part by controlling signaling and trafficking of the GPCR, protease-activated receptor-1 (PAR1). In a series of highly invasive basal-like breast carcinomas, we found that expression of ARRDC3 is suppressed whereas PAR1 is aberrantly overexpressed because of defective lysosomal sorting that results in persistent signaling. Using a lentiviral doxycycline-inducible system, we demonstrate that re-expression of ARRDC3 in invasive breast carcinoma is sufficient to restore normal PAR1 trafficking through the ALG-interacting protein X (ALIX)-dependent lysosomal degradative pathway. We also show that ARRDC3 re-expression attenuates PAR1-stimulated persistent signaling of c-Jun N-terminal kinase (JNK) in invasive breast cancer. Remarkably, restoration of ARRDC3 expression significantly reduced activated PAR1-induced breast carcinoma invasion, which was also dependent on JNK signaling. These findings are the first to identify a critical link between the tumor suppressor ARRDC3 and regulation of GPCR trafficking and signaling in breast cancer.
Collapse
Affiliation(s)
- Aleena K S Arakaki
- From the Biomedical Sciences Graduate Program and.,Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, California 92093
| | - Wen-An Pan
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, California 92093
| | - Huilan Lin
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, California 92093
| | - JoAnn Trejo
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, California 92093
| |
Collapse
|
26
|
Proteinase-activated receptor 2 promotes TGF-β-dependent cell motility in pancreatic cancer cells by sustaining expression of the TGF-β type I receptor ALK5. Oncotarget 2018; 7:41095-41109. [PMID: 27248167 PMCID: PMC5173045 DOI: 10.18632/oncotarget.9600] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 05/14/2016] [Indexed: 12/14/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is characterized by high expression of transforming growth factor (TGF)-β and the G protein-coupled receptor proteinase-activated receptor 2 (PAR2), the latter of which functions as a cell-surface sensor for serine proteinases asscociated with the tumour microenvironment. Since TGF-β and PAR2 affect tumourigenesis by regulating migration, invasion and metastasis, we hypothesized that there is signalling crosstalk between them. Depleting PDAC and non-PDAC cells of PAR2 by RNA interference strongly decreased TGF-β1-induced activation of Smad2/3 and p38 mitogen-activated protein kinase, Smad dependent transcriptional activity, expression of invasion associated genes, and cell migration/invasion in vitro. Likewise, the plasminogen activator-inhibitor 1 gene in primary cultures of aortic smooth muscle cells from PAR2-/- mice displayed a greatly attenuated sensitivity to TGF-β1 stimulation. PAR2 depletion in PDAC cells resulted in reduced protein and mRNA levels of the TGF-β type I receptor activin receptor-like kinase 5 (ALK5). Forced expression of wild-type ALK5 or a kinase-active ALK5 mutant, but not a kinase-active but Smad-binding defective ALK5 mutant, was able to rescue TGF-β1-induced Smad3 activation, Smad dependent transcription, and cell migration in PAR2-depleted cells. Together, our data show that PAR2 is crucial for TGF-β1-induced cell motility by its ability to sustain expression of ALK5. Therapeutically targeting PAR2 may thus be a promising approach in preventing TGF-β-dependent driven metastatic dissemination in PDAC and possibly other stroma-rich tumour types.
Collapse
|
27
|
Pang L, Li JF, Su L, Zang M, Fan Z, Yu B, Wu X, Li C, Yan M, Zhu ZG, Liu B. ALEX1, a novel tumor suppressor gene, inhibits gastric cancer metastasis via the PAR-1/Rho GTPase signaling pathway. J Gastroenterol 2018; 53:71-83. [PMID: 28315004 DOI: 10.1007/s00535-017-1329-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 03/02/2017] [Indexed: 02/04/2023]
Abstract
BACKGROUND The ALEX is a novel member of the armadillo family and ALEX1 was reported to be reduced or even lost in multiple solid tumors. However, its expression profile and oncogenic role in gastric cancer (GC) remains largely unknown. METHODS ALEX1 expression was detected in 161 GC samples by immunohistochemistry staining. NCI-N87 cells transfected by ALEX1 lentivirus vectors and MKN28 cells transfected by ALEX1 shRNA were used for biological function investigation. Western blot was applied to explore the molecular mechanism and pull-down assays were applied to measure the activity of Rho GTPases. In vivo tumorigenicity, peritoneal and lung metastasis experiments were performed by tumor cell engraftment into nude mice. Bisulfite genomic sequencing and methylation-specific PCR were applied to check the methylation status of the ALEX1 gene. RESULTS The expression rate of ALEX1 was significantly reduced in gastric tumor samples compared to non-tumor samples (43.5 vs. 90.2%), and its expression was closely related to the tumor differentiation, TNM staging, and lymph nodes metastasis. ALEX1 overexpression in NCI-N87 cells significantly inhibited cell proliferation, migration, and invasion in vitro, and disrupted the structure of the cytoskeleton. ALEX1 overexpression attenuated xenografts growth, peritoneal, and lung metastasis in nude mice. Mechanistically, the overexpression of ALEX1 inhibits thrombin-induced metastasis and Rho GTPases activation. Bisulfite genomic sequencing and methylation-specific PCR revealed that the promoter of ALEX1 is highly methylated in GC cells and tissues. CONCLUSIONS ALEX1 expression is reduced in GC and is involved in diverse cellular functions. ALEX1 inhibits metastasis through the PAR-1/Rho GTPase signaling pathway.
Collapse
Affiliation(s)
- Li Pang
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Jian-Fang Li
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Liping Su
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Mingde Zang
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Zhiyuan Fan
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Beiqin Yu
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Xiongyan Wu
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Chen Li
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Min Yan
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Zheng-Gang Zhu
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Bingya Liu
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China.
| |
Collapse
|
28
|
Ungefroren H, Witte D, Rauch BH, Settmacher U, Lehnert H, Gieseler F, Kaufmann R. Proteinase-Activated Receptor 2 May Drive Cancer Progression by Facilitating TGF-β Signaling. Int J Mol Sci 2017; 18:E2494. [PMID: 29165389 PMCID: PMC5713460 DOI: 10.3390/ijms18112494] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 11/16/2017] [Accepted: 11/20/2017] [Indexed: 12/23/2022] Open
Abstract
The G protein-coupled receptor proteinase-activated receptor 2 (PAR2) has been implicated in various aspects of cellular physiology including inflammation, obesity and cancer. In cancer, it usually acts as a driver of cancer progression in various tumor types by promoting invasion and metastasis in response to activation by serine proteinases. Recently, we discovered another mode through which PAR2 may enhance tumorigenesis: crosstalk with transforming growth factor-β (TGF-β) signaling to promote TGF-β1-induced cell migration/invasion and invasion-associated gene expression in ductal pancreatic adenocarcinoma (PDAC) cells. In this chapter, we review what is known about the cellular TGF-β responses and signaling pathways affected by PAR2 expression, the signaling activities of PAR2 required for promoting TGF-β signaling, and the potential molecular mechanism(s) that underlie(s) the TGF-β signaling-promoting effect. Since PAR2 is activated through various serine proteinases and biased agonists, it may couple TGF-β signaling to a diverse range of other physiological processes that may or may not predispose cells to cancer development such as local inflammation, systemic coagulation and pathogen infection.
Collapse
Affiliation(s)
- Hendrik Ungefroren
- First Department of Medicine, University Hospital Schleswig-Holstein, D-23538 Lübeck, Germany.
- Department of General and Thoracic Surgery, University Hospital Schleswig-Holstein, D-24105 Kiel, Germany.
| | - David Witte
- First Department of Medicine, University Hospital Schleswig-Holstein, D-23538 Lübeck, Germany.
| | - Bernhard H Rauch
- Department of General Pharmacology, Institute of Pharmacology, University Medicine Greifswald, D-17487 Greifswald, Germany.
| | - Utz Settmacher
- Department of General, Visceral and Vascular Surgery, Jena University Hospital, D-07747 Jena, Germany.
| | - Hendrik Lehnert
- First Department of Medicine, University Hospital Schleswig-Holstein, D-23538 Lübeck, Germany.
| | - Frank Gieseler
- First Department of Medicine, University Hospital Schleswig-Holstein, D-23538 Lübeck, Germany.
| | - Roland Kaufmann
- Department of General, Visceral and Vascular Surgery, Jena University Hospital, D-07747 Jena, Germany.
| |
Collapse
|
29
|
Schechter ME, Andrade BB, He T, Richter GH, Tosh KW, Policicchio BB, Singh A, Raehtz KD, Sheikh V, Ma D, Brocca-Cofano E, Apetrei C, Tracy R, Ribeiro RM, Sher A, Francischetti IMB, Pandrea I, Sereti I. Inflammatory monocytes expressing tissue factor drive SIV and HIV coagulopathy. Sci Transl Med 2017; 9:eaam5441. [PMID: 28855397 PMCID: PMC5755598 DOI: 10.1126/scitranslmed.aam5441] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 07/11/2017] [Indexed: 01/05/2023]
Abstract
In HIV infection, persistent inflammation despite effective antiretroviral therapy is linked to increased risk of noninfectious chronic complications such as cardiovascular and thromboembolic disease. A better understanding of inflammatory and coagulation pathways in HIV infection is needed to optimize clinical care. Markers of monocyte activation and coagulation independently predict morbidity and mortality associated with non-AIDS events. We identified a specific subset of monocytes that express tissue factor (TF), persist after virological suppression, and trigger the coagulation cascade by activating factor X. This subset of monocytes expressing TF had a distinct gene signature with up-regulated innate immune markers and evidence of robust production of multiple proinflammatory cytokines, including interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), and IL-6, ex vivo and in vitro upon lipopolysaccharide stimulation. We validated our findings in a nonhuman primate model, showing that TF-expressing inflammatory monocytes were associated with simian immunodeficiency virus (SIV)-related coagulopathy in the progressive [pigtail macaques (PTMs)] but not in the nonpathogenic (African green monkeys) SIV infection model. Last, Ixolaris, an anticoagulant that inhibits the TF pathway, was tested and potently blocked functional TF activity in vitro in HIV and SIV infection without affecting monocyte responses to Toll-like receptor stimulation. Strikingly, in vivo treatment of SIV-infected PTMs with Ixolaris was associated with significant decreases in D-dimer and immune activation. These data suggest that TF-expressing monocytes are at the epicenter of inflammation and coagulation in chronic HIV and SIV infection and may represent a potential therapeutic target.
Collapse
Affiliation(s)
- Melissa E Schechter
- Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21701, USA
| | - Bruno B Andrade
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador 40296-710, Brazil
- Multinational Organization Network Sponsoring Translational and Epidemiological Research (MONSTER) Initiative, Instituto Brasileiro para a Investigação da Tuberculose, Fundação José Silveira, Salvador 40210-320, Brazil
- Wellcome Centre for Infectious Disease Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town 7925, South Africa
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Tianyu He
- Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - George Haret Richter
- Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Kevin W Tosh
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Benjamin B Policicchio
- Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Amrit Singh
- HIV Pathogenesis Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Kevin D Raehtz
- Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Virginia Sheikh
- HIV Pathogenesis Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Dongying Ma
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Egidio Brocca-Cofano
- Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Cristian Apetrei
- Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Russel Tracy
- Department of Pathology and Laboratory Medicine, The Robert Larner, M.D. College of Medicine University of Vermont, Burlington, VT 05405, USA
| | - Ruy M Ribeiro
- Theoretical Biology and Biophysics, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
- Laboratório de Biomatemática, Faculdade de Medicina, Universidade de Lisboa, Lisboa 1649-028, Portugal
| | - Alan Sher
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ivo M B Francischetti
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ivona Pandrea
- Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA.
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Irini Sereti
- HIV Pathogenesis Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
| |
Collapse
|
30
|
Ungefroren H, Witte D, Mihara K, Rauch BH, Henklein P, Jöhren O, Bonni S, Settmacher U, Lehnert H, Hollenberg MD, Kaufmann R, Gieseler F. Transforming Growth Factor-β1/Activin Receptor-like Kinase 5-Mediated Cell Migration is Dependent on the Protein Proteinase-Activated Receptor 2 but not on Proteinase-Activated Receptor 2-Stimulated Gq-Calcium Signaling. Mol Pharmacol 2017; 92:519-532. [DOI: 10.1124/mol.117.109017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 08/07/2017] [Indexed: 01/01/2023] Open
|
31
|
Aman M, Ohishi Y, Imamura H, Shinozaki T, Yasutake N, Kato K, Oda Y. Expression of protease-activated receptor-2 (PAR-2) is related to advanced clinical stage and adverse prognosis in ovarian clear cell carcinoma. Hum Pathol 2017; 64:156-163. [DOI: 10.1016/j.humpath.2017.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 04/13/2017] [Accepted: 04/14/2017] [Indexed: 01/17/2023]
|
32
|
Wojtukiewicz MZ, Hempel D, Sierko E, Tucker SC, Honn KV. Thrombin-unique coagulation system protein with multifaceted impacts on cancer and metastasis. Cancer Metastasis Rev 2017; 35:213-33. [PMID: 27189210 DOI: 10.1007/s10555-016-9626-0] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The association between blood coagulation and cancer development is well recognized. Thrombin, the pleiotropic enzyme best known for its contribution to fibrin formation and platelet aggregation during vascular hemostasis, may also trigger cellular events through protease-activated receptors, PAR-1 and PAR-4, leading to cancer progression. Our pioneering findings provided evidence that thrombin contributes to cancer metastasis by increasing adhesive potential of malignant cells. However, there is evidence that thrombin regulates every step of cancer dissemination: (1) cancer cell invasion, detachment from primary tumor, migration; (2) entering the blood vessel; (3) surviving in vasculature; (4) extravasation; (5) implantation in host organs. Recent studies have provided new molecular data about thrombin generation in cancer patients and the mechanisms by which thrombin contributes to transendothelial migration, platelet/tumor cell interactions, angiogenesis, and other processes. Though a great deal is known regarding the role of thrombin in cancer dissemination, there are new data for multiple thrombin-mediated events that justify devoting focus to this topic with a comprehensive approach.
Collapse
Affiliation(s)
- Marek Z Wojtukiewicz
- Department of Oncology, Medical University of Bialystok, 12 Ogrodowa St., 15-025, Bialystok, Poland. .,Department of Clinical Oncology, Comprehensive Cancer Center in Bialystok, Bialystok, Poland.
| | - Dominika Hempel
- Department of Oncology, Medical University of Bialystok, 12 Ogrodowa St., 15-025, Bialystok, Poland.,Department of Radiotherapy, Comprehensive Cancer Center in Bialystok, Bialystok, Poland
| | - Ewa Sierko
- Department of Oncology, Medical University of Bialystok, 12 Ogrodowa St., 15-025, Bialystok, Poland.,Department of Radiotherapy, Comprehensive Cancer Center in Bialystok, Bialystok, Poland
| | - Stephanie C Tucker
- Bioactive Lipids Research Program, Department of Pathology-School of Medicine, Wayne State University, Detroit, MI, USA
| | - Kenneth V Honn
- Bioactive Lipids Research Program, Department of Pathology-School of Medicine, Wayne State University, Detroit, MI, USA.,Department of Chemistry, Wayne State University, Detroit, MI, USA.,Department of Oncology, Karmanos Cancer Institute, Detroit, MI, USA
| |
Collapse
|
33
|
Witte D, Zeeh F, Gädeken T, Gieseler F, Rauch BH, Settmacher U, Kaufmann R, Lehnert H, Ungefroren H. Proteinase-Activated Receptor 2 Is a Novel Regulator of TGF-β Signaling in Pancreatic Cancer. J Clin Med 2016; 5:E111. [PMID: 27916875 PMCID: PMC5184784 DOI: 10.3390/jcm5120111] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 11/22/2016] [Accepted: 11/28/2016] [Indexed: 02/06/2023] Open
Abstract
TGF-β has a dual role in tumorigenesis, acting as a tumor suppressor in normal cells and in the early stages of tumor development while promoting carcinogenesis and metastasis in advanced tumor stages. The final outcome of the TGF-β response is determined by cell-autonomous mechanisms and genetic alterations such as genomic instability and somatic mutations, but also by a plethora of external signals derived from the tumor microenvironment, such as cell-to-cell interactions, growth factors and extracellular matrix proteins and proteolytic enzymes. Serine proteinases mediate their cellular effects via activation of proteinase-activated receptors (PARs), a subclass of G protein-coupled receptors that are activated by proteolytic cleavage. We have recently identified PAR2 as a factor required for TGF-β1-dependent cell motility in ductal pancreatic adenocarcinoma (PDAC) cells. In this article, we review what is known on the TGF-β-PAR2 signaling crosstalk and its relevance for tumor growth and metastasis. Since PAR2 is activated through various serine proteinases, it may couple TGF-β signaling to a diverse range of other physiological processes, such as local inflammation, systemic coagulation or pathogen infection. Moreover, since PAR2 controls expression of the TGF-β type I receptor ALK5, PAR2 may also impact signaling by other TGF-β superfamily members that signal through ALK5, such as myostatin and GDF15/MIC-1. If so, PAR2 could represent a molecular linker between PDAC development and cancer-related cachexia.
Collapse
Affiliation(s)
- David Witte
- First Department of Medicine, University Hospital Schleswig-Holstein (UKSH), and University of Lübeck, D-23538 Lübeck, Germany.
| | - Franziska Zeeh
- First Department of Medicine, University Hospital Schleswig-Holstein (UKSH), and University of Lübeck, D-23538 Lübeck, Germany.
| | - Thomas Gädeken
- First Department of Medicine, University Hospital Schleswig-Holstein (UKSH), and University of Lübeck, D-23538 Lübeck, Germany.
| | - Frank Gieseler
- First Department of Medicine, University Hospital Schleswig-Holstein (UKSH), and University of Lübeck, D-23538 Lübeck, Germany.
| | - Bernhard H Rauch
- Department of General Pharmacology, Institute of Pharmacology, University Medicine Greifswald, D-17487 Greifswald, Germany.
| | - Utz Settmacher
- Department of General, Visceral and Vascular Surgery, Jena University Hospital, D-07747 Jena, Germany.
| | - Roland Kaufmann
- Department of General, Visceral and Vascular Surgery, Jena University Hospital, D-07747 Jena, Germany.
| | - Hendrik Lehnert
- First Department of Medicine, University Hospital Schleswig-Holstein (UKSH), and University of Lübeck, D-23538 Lübeck, Germany.
| | - Hendrik Ungefroren
- First Department of Medicine, University Hospital Schleswig-Holstein (UKSH), and University of Lübeck, D-23538 Lübeck, Germany.
| |
Collapse
|
34
|
Vianello F, Sambado L, Goss A, Fabris F, Prandoni P. Dabigatran antagonizes growth, cell-cycle progression, migration, and endothelial tube formation induced by thrombin in breast and glioblastoma cell lines. Cancer Med 2016; 5:2886-2898. [PMID: 27600331 PMCID: PMC5083743 DOI: 10.1002/cam4.857] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 06/15/2016] [Accepted: 07/16/2016] [Indexed: 02/01/2023] Open
Abstract
Thrombin activates its G-coupled seven transmembrane protease-activated receptor (PAR-1) by cleaving the receptor's N-terminal end. In several human cancers, PAR1 expression and activation correlates with tumor progression and metastatization. This provides compelling evidence for the effectiveness of an appropriate antithrombin agent for the adjuvant treatment of patients with cancer. Dabigatran is a selective direct thrombin inhibitor that reversibly binds to thrombin. In this study, we aimed to explore if dabigatran may affect mechanisms favoring tumor growth by interfering with thrombin-induced PAR-1 activation. We confirmed that exposure of tumor cells to thrombin significantly increased cell proliferation and this was coupled with downregulation of p27 and concomitant induction of cyclin D1. Dabigatran was consistently effective in antagonizing thrombin-induced proliferation as well as it restored the baseline pattern of cell cycle protein expression. Thrombin significantly upregulated the expression of proangiogenetic proteins like Twist and GRO-α in human umbilical vascular endothelial cells (HUVEC) cells and their expression was significantly brought down to control levels when dabigatran was added to culture. We also found that the chemoattractant effect of thrombin on tumor cells was lost in the presence of dabigatran, and that the thrombin antagonist was effective in dampening vascular tube formation induced by thrombin. Our data support a role of thrombin in inducing the proliferation, migration, and proangiogenetic effects of tumor cells in vitro. Dabigatran has activity in antagonizing all these effects, thereby impairing tumor growth and progression. In vivo models may help to understand the relevance of this pathway.
Collapse
Affiliation(s)
- Fabrizio Vianello
- Department of Medicine, University of Padova School of Medicine, Padova, Italy.
| | - Luisa Sambado
- Department of Medicine, University of Padova School of Medicine, Padova, Italy
| | - Ashley Goss
- Boehringer Ingelheim International GmbH, Ingelheim am Rhein, Deutschland, Germany
| | - Fabrizio Fabris
- Department of Medicine, University of Padova School of Medicine, Padova, Italy
| | - Paolo Prandoni
- Department of Cardiologic, Thoracic and Vascular Sciences, University of Padova School of Medicine, Padova, Italy
| |
Collapse
|
35
|
Abstract
Although many studies have demonstrated that components of the hemostatic system may be involved in signaling leading to cancer progression, the potential mechanisms by which they contribute to cancer dissemination are not yet precisely understood. Among known coagulant factors, tissue factor (TF) and thrombin play a pivotal role in cancer invasion. They may be generated in the tumor microenvironment independently of blood coagulation and can induce cell signaling through activation of protease-activated receptors (PARs). PARs are transmembrane G-protein-coupled receptors (GPCRs) that are activated by a unique proteolytic mechanism. They play important roles in vascular physiology, neural tube closure, hemostasis, and inflammation. All of these agents (TF, thrombin, PARs—mainly PAR-1 and PAR-2) are thought to promote cancer invasion and metastasis at least in part by facilitating tumor cell migration, angiogenesis, and interactions with host vascular cells, including platelets, fibroblasts, and endothelial cells lining blood vessels. Here, we discuss the role of PARs and their activators in cancer progression, focusing on TF- and thrombin-mediated actions. Therapeutic options tailored specifically to inhibit PAR-induced signaling in cancer patients are presented as well.
Collapse
|
36
|
Shahbazi S, Khorasani M, Mahdian R. Gene expression profile of FVII and AR in primary prostate cancer. Cancer Biomark 2016; 17:353-358. [DOI: 10.3233/cbm-160647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Shirin Shahbazi
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Maryam Khorasani
- Molecular Medicine Department, Pasteur Institute of Iran, Tehran, Iran
| | - Reza Mahdian
- Molecular Medicine Department, Pasteur Institute of Iran, Tehran, Iran
| |
Collapse
|
37
|
Mußbach F, Ungefroren H, Günther B, Katenkamp K, Henklein P, Westermann M, Settmacher U, Lenk L, Sebens S, Müller JP, Böhmer FD, Kaufmann R. Proteinase-activated receptor 2 (PAR2) in hepatic stellate cells - evidence for a role in hepatocellular carcinoma growth in vivo. Mol Cancer 2016; 15:54. [PMID: 27473374 PMCID: PMC4966804 DOI: 10.1186/s12943-016-0538-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 07/18/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Previous studies have established that proteinase-activated receptor 2 (PAR2) promotes migration and invasion of hepatocellular carcinoma (HCC) cells, suggesting a role in HCC progression. Here, we assessed the impact of PAR2 in HCC stromal cells on HCC growth using LX-2 hepatic stellate cells (HSCs) and Hep3B cells as model. METHODS PAR2 expression and function in LX-2 cells was analysed by RT-PCR, confocal immunofluorescence, electron microscopy, and [Ca(2+)]i measurements, respectively. The impact of LX-2-expressed PAR2 on tumour growth in vivo was monitored using HCC xenotransplantation experiments in SCID mice, in which HCC-like tumours were induced by coinjection of LX-2 cells and Hep3B cells. To characterise the effects of PAR2 activation in LX-2 cells, various signalling pathways were analysed by immunoblotting and proteome profiler arrays. RESULTS Following verification of functional PAR2 expression in LX-2 cells, in vivo studies showed that these cells promoted tumour growth and angiogenesis of HCC xenografts in mice. These effects were significantly reduced when F2RL1 (encoding PAR2) was downregulated by RNA interference (RNAi). In vitro studies confirmed these results demonstrating RNAi mediated inhibition of PAR2 attenuated Smad2/3 activation in response to TGF-β1 stimulation in LX-2 cells and blocked the pro-mitotic effect of LX-2 derived conditioned medium on Hep3B cells. Furthermore, PAR2 stimulation with trypsin or a PAR2-selective activating peptide (PAR2-AP) led to activation of different intracellular signalling pathways, an increased secretion of pro-angiogenic and pro-mitotic factors and proteinases, and an enhanced migration rate across a collagen-coated membrane barrier. Silencing F2RL1 by RNAi or pharmacological inhibition of Src, hepatocyte growth factor receptor (Met), platelet-derived growth factor receptor (PDGFR), p42/p44 mitogen activated protein kinase (MAPK) or matrix-metalloproteinases (MMPs) blocked PAR2-AP-induced migration. CONCLUSION PAR2 in HSCs plays a crucial role in promoting HCC growth presumably by mediating migration and secretion of pro-angiogenic and pro-mitotic factors. Therefore, PAR2 in stromal HSCs may have relevance as a therapeutic target of HCC.
Collapse
Affiliation(s)
- Franziska Mußbach
- Department of General, Visceral and Vascular Surgery, Jena University Hospital, Erlanger Allee 101, D-07747, Jena, Germany
| | - Hendrik Ungefroren
- First Department of Medicine, UKSH and University of Lübeck, Lübeck, Germany
| | - Bernd Günther
- Service Unit Small Animal, Research Center Lobeda (FZL), Jena University Hospital, Jena, Germany
| | | | | | | | - Utz Settmacher
- Department of General, Visceral and Vascular Surgery, Jena University Hospital, Erlanger Allee 101, D-07747, Jena, Germany
| | - Lennart Lenk
- Group Inflammatory Carcinogenesis, Institute for Experimental Cancer Research, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein (UKSH), Campus Kiel, Kiel, Germany
| | - Susanne Sebens
- Group Inflammatory Carcinogenesis, Institute for Experimental Cancer Research, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein (UKSH), Campus Kiel, Kiel, Germany
| | - Jörg P Müller
- Institute of Molecular Cell Biology, Center for Molecular Biomedicine, Jena University Hospital, Jena, Germany
| | - Frank-Dietmar Böhmer
- Institute of Molecular Cell Biology, Center for Molecular Biomedicine, Jena University Hospital, Jena, Germany
| | - Roland Kaufmann
- Department of General, Visceral and Vascular Surgery, Jena University Hospital, Erlanger Allee 101, D-07747, Jena, Germany.
| |
Collapse
|
38
|
Maiwald A, Hammami M, Wagner S, Heine A, Klebe G, Steinmetzer T. Changing the selectivity profile – from substrate analog inhibitors of thrombin and factor Xa to potent matriptase inhibitors. J Enzyme Inhib Med Chem 2016; 31:89-97. [DOI: 10.3109/14756366.2016.1172574] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Alexander Maiwald
- Department of Pharmacy, Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| | - Maya Hammami
- Department of Pharmacy, Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| | - Sebastian Wagner
- Department of Pharmacy, Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| | - Andreas Heine
- Department of Pharmacy, Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| | - Gerhard Klebe
- Department of Pharmacy, Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| | - Torsten Steinmetzer
- Department of Pharmacy, Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| |
Collapse
|
39
|
Wang Y, Liu J, Ying X, Lin PC, Zhou BP. Twist-mediated Epithelial-mesenchymal Transition Promotes Breast Tumor Cell Invasion via Inhibition of Hippo Pathway. Sci Rep 2016; 6:24606. [PMID: 27094683 PMCID: PMC4837350 DOI: 10.1038/srep24606] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 04/01/2016] [Indexed: 02/06/2023] Open
Abstract
Twist is a key transcription factor for Epithelial-mesenchymal transition (EMT), which is a cellular de-differentiation program that promotes invasion and metastasis, confers tumor cells with cancer stem cell (CSC)-like characteristics, and increases therapeutic resistance. However, the mechanisms that facilitate the functions of Twist remain unclear. Here we report that Twist overexpression increased expression of PAR1, an upstream regulator of the Hippo pathway; PAR1 promotes invasion, migration, and CSC-like properties in breast cancer by activating the transcriptional co-activator TAZ. Our study indicates that Hippo pathway inhibition is required for the increased migratory and invasiveness ability of breast cancer cells in Twist-mediated EMT.
Collapse
Affiliation(s)
- Yifan Wang
- Cancer Institute of Integrative Medicine, Zhejiang Academy of Chinese Medicine, Hangzhou, Zhejiang, 310007, China.,Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, the University of Kentucky, College of Medicine, Lexington, KY 40506, United States
| | - Jingyi Liu
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China.,Center for Cancer Research, National Cancer Institute-Frederick, Frederick, MD 21702, USA.,Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, the University of Kentucky, College of Medicine, Lexington, KY 40506, United States
| | - Xuhua Ying
- Cancer Institute of Integrative Medicine, Zhejiang Academy of Chinese Medicine, Hangzhou, Zhejiang, 310007, China
| | - Pengnian Charles Lin
- Center for Cancer Research, National Cancer Institute-Frederick, Frederick, MD 21702, USA
| | - Binhua P Zhou
- Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, the University of Kentucky, College of Medicine, Lexington, KY 40506, United States
| |
Collapse
|
40
|
Tas F, Bilgin E, Karabulut S, Erturk K, Duranyildiz D. Clinical significance of serum Protease-Activated Receptor-1 (PAR-1) levels in patients with cutaneous melanoma. BBA CLINICAL 2016; 5:166-9. [PMID: 27141440 PMCID: PMC4840403 DOI: 10.1016/j.bbacli.2016.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 04/02/2016] [Accepted: 04/04/2016] [Indexed: 12/15/2022]
Abstract
Background Protease-Activated Receptor-1 (PAR-1) plays an important role in the pathogenesis of multiple malignancies and its expression strongly also affects the outcomes of cancer patients. The objective of this study was to determine the clinical significance of the serum levels of PAR-1in cutaneous melanoma patients. Methods A total of 60 patients with a pathologically confirmed diagnosis of cutaneous melanoma were enrolled into this study. Serum PAR-1concentrations were determined by the solid-phase sandwich ELISA method. Results No significant difference in serum PAR-1 levels between melanoma patients and healthy controls was found (p = 0.07). The known clinical variables including age of patient, gender, site of lesion, histology, stage of disease, serum LDH levels and chemotherapy responsiveness were not correlated with serum PAR-1 concentrations (p > 0.05). Likewise, serum PAR-1 concentration had also no prognostic role on survival (p = 0.41). Conclusion Serum levels of PAR-1 have no diagnostic, predictive and prognostic roles in cutaneous melanoma patients. General significance Measurement of PAR-1 in serum is not a clinical significance in cutaneous melanoma patients. PAR-1 plays an important role in the pathogenesis of multiple malignancies. Its expression strongly also affects the outcomes of cancer patients. Serum levels of PAR-1 have no diagnostic, predictive and prognostic roles in cutaneous melanoma patients.
Collapse
Affiliation(s)
- Faruk Tas
- Institute of Oncology, University of Istanbul, Istanbul, Turkey
| | - Elif Bilgin
- Institute of Oncology, University of Istanbul, Istanbul, Turkey
| | - Senem Karabulut
- Institute of Oncology, University of Istanbul, Istanbul, Turkey
| | - Kayhan Erturk
- Institute of Oncology, University of Istanbul, Istanbul, Turkey
| | | |
Collapse
|
41
|
Schneider G, Sellers ZP, Ratajczak MZ. Induction of a Tumor-Metastasis-Receptive Microenvironment as an Unwanted Side Effect After Radio/Chemotherapy and In Vitro and In Vivo Assays to Study this Phenomenon. Methods Mol Biol 2016; 1516:347-360. [PMID: 27032941 DOI: 10.1007/7651_2016_323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Besides surgical removal of tumor tissue, chemotherapy and radiotherapy are the most important and efficient treatment modalities employed to treat therapy-susceptible malignancies. The main aim of this treatment-to destroy tumor cells-is unfortunately usually associated with toxicity to nontumor cells and different degrees of tissue and organ damage. In damaged tissues several chemoattractants are upregulated and released that may attract tumor cells. Moreover, highly migratory radio/chemotherapy treatment may endow cells with several properties of cancer stem cells which survive and respond to these chemoattractants upregulated in collateral tissues. Based on this, one of the unwanted and underappreciated side effects of chemotherapy or radiotherapy is the creation of a metastasis-receptive microenvironment in bones as well as in other organs of the body. Herein we describe methods and assays that can be employed to study migratory properties of cancer cells in in vitro (chemotaxis) and in vivo (seeding efficiency assay) conditions in response to the induction of pro-metastatic microenvironments in various organs and tissues.
Collapse
Affiliation(s)
- Gabriela Schneider
- Stem Cell Institute at the James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 103, Louisville, KY, 40202, USA.
| | - Zachariah Payne Sellers
- Stem Cell Institute at the James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 104, Louisville, KY, 40202, USA
| | - Mariusz Z Ratajczak
- Stem Cell Institute at the James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY, 40202, USA
| |
Collapse
|
42
|
Bar-Shavit R, Maoz M, Kancharla A, Jaber M, Agranovich D, Grisaru-Granovsky S, Uziely B. Protease-activated receptors (PARs) in cancer: Novel biased signaling and targets for therapy. Methods Cell Biol 2015; 132:341-58. [PMID: 26928551 DOI: 10.1016/bs.mcb.2015.11.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite the fact that G protein-coupled receptors (GPCRs) mediate numerous physiological processes and represent targets for therapeutics for a vast array of diseases, their role in tumor biology is under appreciated. Protease-activated receptors (PARs) form a family which belongs to GPCR class A. PAR1&2 emerge with a central role in epithelial malignancies. Although the part of PAR1&2 in cancer is on the rise, their underlying signaling events are poorly understood. We review hereby past, present, and future cancer-associated PAR biology. Mainly, their role in physiological (placenta-cytotophobalst) and patho-physiological invasion processes. The identification and characterization of signal pleckstrin homology (PH)-domain-binding motifs established critical sites for breast cancer growth in PAR1&2. Among the proteins found to harbor important PH-domains and are involved in PAR biology are Akt/PKB as also Etk/Bmx and Vav3. A point mutation in PAR2, H349A, but not R352A, abrogated PH-protein association and is sufficient to markedly reduce PAR2-instigated breast tumor growth in vivo as also placental extravillous trophoblast (EVT) invasion in vitro is markedly reduced. Similarly, the PAR1 mutant hPar1-7A, which is unable to bind PH-domain, inhibits mammary tumors and EVT invasion, endowing these motifs with physiological significance and underscoring the importance of these previously unknown PAR1 and PAR2 PH-domain-binding motifs in both pathological and physiological invasion processes.
Collapse
Affiliation(s)
- R Bar-Shavit
- Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - M Maoz
- Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - A Kancharla
- Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - M Jaber
- Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - D Agranovich
- Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | | | - B Uziely
- Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| |
Collapse
|
43
|
Li Y, Du X, Pei G, Du J, Zhao J. β-Arrestin1 regulates the morphology and dynamics of microglia in zebrafish in vivo. Eur J Neurosci 2015; 43:131-8. [PMID: 26354363 DOI: 10.1111/ejn.13065] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 09/02/2015] [Accepted: 09/04/2015] [Indexed: 01/24/2023]
Abstract
Microglia are the primary immune cells in the central nervous system. Microglia typically exist in a 'resting' state in the healthy brain, with ramified processes dynamically exploring the surrounding microenvironment. They become 'activated' under pathological conditions with marked changes in morphology. However, the regulation of their morphology dynamics remains poorly understood. Here, using in vivo time-lapse imaging and three-dimensional morphology analysis of microglia in intact zebrafish larvae, we found that β-arrestin1, a multifunctional protein involved in various signal transductions, cell-autonomously regulated the microglial morphology. Knockdown of β-arrestin1 increased the volume size and process number of microglia but reduced the deformation speed in the resting state. Meanwhile, β-arrestin1 down-regulation led to a high frequency of phagocytic behaviour of microglia. These defects were partially rescued by over-expressing human β-arrestin1 in microglia. Our study indicated that microglial dynamics in the resting state can be regulated cell-autonomously by β-arrestin1 signalling.
Collapse
Affiliation(s)
- Yuanyuan Li
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Xufei Du
- Institute of Neuroscience and State Key Laboratory of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Gang Pei
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Jiulin Du
- Institute of Neuroscience and State Key Laboratory of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Jian Zhao
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China.,Translational Medical Center for Stem Cell Therapy, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| |
Collapse
|
44
|
Hockla A, Miller E, Salameh MA, Copland JA, Radisky DC, Radisky ES. PRSS3/mesotrypsin is a therapeutic target for metastatic prostate cancer. Mol Cancer Res 2013; 10:1555-66. [PMID: 23258495 DOI: 10.1158/1541-7786.mcr-12-0314] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
PRSS3/mesotrypsin is an atypical isoform of trypsin that has been associated with breast, lung, and pancreatic cancer cell malignancy. In analyses of open source transcriptional microarray data, we find that PRSS3 expression is upregulated in metastatic prostate cancer tissue, and that expression of PRSS3 in primary prostate tumors is prognostic of systemic progression following prostatectomy. Using a mouse orthotopic model with bioluminescent imaging, we show that PRSS3/mesotrypsin is critical for prostate cancer metastasis. Silencing of PRSS3 inhibits anchorage-independent growth of prostate cancer cells in soft agar assays, and suppresses invasiveness in Matrigel transwell assays and three-dimensional (3D) cell culture models. We further show that treatment with recombinant mesotrypsin directly promotes an invasive cellular phenotype in prostate cancer cells and find that these effects are specific and require the proteolytic activity of mesotrypsin, because neither cationic trypsin nor a mesotrypsin mutant lacking activity can drive the invasive phenotype. Finally, we show that a newly developed, potent inhibitor of mesotrypsin activity can suppress prostate cancer cell invasion to a similar extent as PRSS3 gene silencing. This study defines mesotrypsin as an important mediator of prostate cancer progression and metastasis, and suggests that inhibition of mesotrypsin activity may provide a novel modality for prostate cancer treatment.
Collapse
Affiliation(s)
- Alexandra Hockla
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL 32224, USA
| | | | | | | | | | | |
Collapse
|
45
|
Zigler M, Kamiya T, Brantley EC, Villares GJ, Bar-Eli M. PAR-1 and thrombin: the ties that bind the microenvironment to melanoma metastasis. Cancer Res 2011; 71:6561-6. [PMID: 22009534 PMCID: PMC3206157 DOI: 10.1158/0008-5472.can-11-1432] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Progression of melanoma is dependent on cross-talk between tumor cells and the adjacent microenvironment. The thrombin receptor, protease-activated receptor-1 (PAR-1), plays a key role in exerting this function during melanoma progression. PAR-1 and its activating factors, which are expressed on tumor cells and the surrounding stroma, induce not only coagulation but also cell signaling, which promotes the metastatic phenotype. Several adhesion molecules, cytokines, growth factors, and proteases have recently been identified as downstream targets of PAR-1 and have been shown to modulate interactions between tumor cells and the microenvironment in the process of melanoma growth and metastasis. Inhibiting such interactions by targeting PAR-1 could potentially be a useful therapeutic modality for melanoma patients.
Collapse
Affiliation(s)
- Maya Zigler
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | | | | | | | | |
Collapse
|
46
|
Abstract
From the beginning of their lives, cancer cells exert a procoagulant activity in their microenvironment, which can extend systemically and become clinically evident as Trousseau's syndrome, the well-known association between tumor and thrombosis. It is becoming clear that the genetic mechanisms responsible for neoplastic transformation (activation of oncogenes such as RAS or MET, and inactivation of tumor suppressor genes such as p53 or PTEN) directly induce the expression of genes controlling hemostasis. Activation of blood coagulation results in a selective advantage for cancer cells, as fibrin provides a scaffold for anchorage and invasion, and coagulation proteins induce receptor-mediated intracellular signals promoting invasive growth. Targeting the tumor procoagulant activity can fight not only a dangerous tumor adverse effect, but also the core mechanisms of cancer onset and progression.
Collapse
Affiliation(s)
- Carla Boccaccio
- From the Institute for Cancer Research and Treatment, University of Turin Medical School, Candiolo, Torino, Italy
| | - Paolo M. Comoglio
- From the Institute for Cancer Research and Treatment, University of Turin Medical School, Candiolo, Torino, Italy
| |
Collapse
|
47
|
Hu L, Ibrahim S, Liu C, Skaar J, Pagano M, Karpatkin S. Thrombin induces tumor cell cycle activation and spontaneous growth by down-regulation of p27Kip1, in association with the up-regulation of Skp2 and MiR-222. Cancer Res 2009; 69:3374-81. [PMID: 19351827 DOI: 10.1158/0008-5472.can-08-4290] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The effect of thrombin on tumor cell cycle activation and spontaneous growth was examined in synchronized serum-starved tumor cell lines and a model of spontaneous prostate cancer development in TRAMP mice. BrdUrd incorporation and propidium iodide staining of prostate LNCaP cells arrested in G(0) and treated with thrombin or serum revealed a 48- and 29-fold increase in S phase cells, respectively, at 8 hours. Similar results were obtained with TRAMP cells and a glioblastoma cell line, T98G. Cell cycle kinases and inhibitors in synchronized tumor cells revealed high levels of p27(Kip1) and low levels of Skp2 and cyclins D1 and A. Addition of thrombin, TFLLRN, or serum down-regulated p27(Kip1) with concomitant induction of Skp2, Cyclin D1, and Cyclin A with similar kinetics. LNCaP p27(Kip1)-transfected cells or Skp2 knockdown cells were refractory to thrombin-induced cell cycle activation. MicroRNA 222, an inhibitor of p27(Kip1), was robustly up-regulated by thrombin. The in vitro observations were tested in vivo with transgenic TRAMP mice. Repetitive thrombin injection enhanced prostate tumor volume 6- to 8-fold (P < 0.04). Repetitive hirudin, a specific potent antithrombin, decreased tumor volume 13- to 24-fold (P < 0.04). Thus, thrombin stimulates tumor cell growth in vivo by down-regulation of p27(Kip1).
Collapse
Affiliation(s)
- Liang Hu
- Department of Medicine, New York University School of Medicine, New York, USA
| | | | | | | | | | | |
Collapse
|
48
|
Affiliation(s)
- David L Green
- Department of Medicine/Hematology, New York University School of Medicine, 550 First Ave, New York, NY 10016, USA.
| | | |
Collapse
|
49
|
Versteeg HH, Schaffner F, Kerver M, Ellies LG, Andrade-Gordon P, Mueller BM, Ruf W. Protease-activated receptor (PAR) 2, but not PAR1, signaling promotes the development of mammary adenocarcinoma in polyoma middle T mice. Cancer Res 2008; 68:7219-27. [PMID: 18757438 DOI: 10.1158/0008-5472.can-08-0419] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The G protein-coupled protease-activated receptors (PAR) are key signaling components for proteases in vascular biology and tumor progression. To address the contributions of PAR1 and PAR2 to breast cancer development, we established cohorts of mouse mammary tumor virus-polyoma middle T (PyMT) PAR1(-/-) and PAR2(-/-) mice, considering that the PyMT model recapitulates aspects of human disease. Appearance of palpable tumors, tumor expansion, and metastasis was indistinguishable between wild-type and PAR1(-/-) mice. PAR1(-/-) breast cancer cells were no longer responsive to thrombin in vitro, excluding compensatory up-regulation of alternative thrombin receptors and indicating that thrombin-PAR1 signaling is dispensable in breast tumor microenvironments. In contrast, palpable tumors and multifocal disease developed slower in PAR2(-/-) mice, and as a consequence of delayed tumor onset, metastasis was reduced. Analysis of early tumors showed persistence of adenomas with delayed appearance of vascularized adenocarcinomas in PAR2(-/-) mice. Furthermore, CXCL1 production by early PAR2(-/-) tumors was reduced. These results are consistent with previous xenograft data that implicated breast cancer PAR2 signaling in the induction of proangiogenic growth factors and chemokines. This study establishes that protease signaling contributes to mammary tumor development and that PAR2, rather than the thrombin receptor PAR1, plays a crucial role in the angiogenic switch.
Collapse
Affiliation(s)
- Henri H Versteeg
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | | | | | | | | | | |
Collapse
|
50
|
Mize GJ, Wang W, Takayama TK. Prostate-specific kallikreins-2 and -4 enhance the proliferation of DU-145 prostate cancer cells through protease-activated receptors-1 and -2. Mol Cancer Res 2008; 6:1043-51. [PMID: 18567807 DOI: 10.1158/1541-7786.mcr-08-0096] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A major characteristic of prostate cancer is the elevation of serum levels of prostate-specific antigen (hK3) and hK2, which are tumor markers that correlate with advancing stages of disease. Including hK4, these three kallikrein serine proteases are almost exclusively produced by the prostate. Prostate cancer cells have been recently shown to overexpress protease-activated receptors (PAR), which can be potentially activated by kallikreins and can regulate tumor growth. Here, we show that recombinant hK2 and hK4 activate ERK1/2 signaling of DU-145, PC-3, and LNCaP prostate cancer cells, which express both PAR1 and PAR2. These kallikreins also stimulate the proliferation of DU-145 cells. Pretreatment of hK2 and hK4 with the serine protease inhibitor, aprotinin, blocks the responses in DU-145 cells, and small interfering RNA against PAR1 and PAR2 also inhibits ERK1/2 signaling. To determine which PAR is activated by hK2 and hK4, a cell line that expresses a single PAR, a PAR1 knockout mouse lung fibroblast cell line transfected with PAR1 (KOLF-PAR1) or PAR2 (KOLF-PAR2) was used. hK4 activates both PAR1 and PAR2, whereas hK2 activates PAR2. hK4 generates more phosphorylated ERK1/2 than hK2. These data indicate that prostatic kallikreins (hK2 and hK4) directly stimulate prostate cancer cell proliferation through PAR1 and/or PAR2 and may be potentially important targets for future drug therapy for prostate cancer.
Collapse
Affiliation(s)
- Gregory J Mize
- Department of Urology, University of Washington, Box 356510, Seattle, WA 98195, USA
| | | | | |
Collapse
|