1
|
Nandana MB, Bharatha M, Praveen R, Nayaka S, Vishwanath BS, Rajaiah R. Dimethyl ester of bilirubin ameliorates Naja naja snake venom-induced lung toxicity in mice via inhibiting NLRP3 inflammasome and MAPKs activation. Toxicon 2024; 244:107757. [PMID: 38740099 DOI: 10.1016/j.toxicon.2024.107757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/06/2024] [Accepted: 05/10/2024] [Indexed: 05/16/2024]
Abstract
Naja naja snake bite causes thousands of deaths worldwide in a year. N. naja envenomed victims exhibit both local and systemic reactions that potentially lead to death. In clinical practice, pulmonary complications in N. naja envenomation are commonly encountered. However, the molecular mechanisms underlying N. naja venom-induced lung toxicity remain unknown. Here, we reasoned that N. naja venom-induced lung toxicity is prompted by NLRP3 inflammasome and MAPKs activation in mice. Treatment with dimethyl ester of bilirubin (BD1), significantly inhibited the N. naja venom-induced activation of NLRP3 inflammasome and MAPKs both in vivo and in vitro (p < 0.05). Further, BD1 reduced N. naja venom-induced recruitment of inflammatory cells, and hemorrhage in the lung toxicity examined by histopathology. BD1 also diminished N. naja venom-induced local toxicities in paw edema and myotoxicity in mice. Furthermore, BD1 was able to enhance the survival time against N. naja venom-induced mortality in mice. In conclusion, the present data showed that BD1 alleviated N. naja venom-induced lung toxicity by inhibiting NLRP3 inflammasome and MAPKs activation. Small molecule inhibitors that intervene in venom-induced toxicities may have therapeutic applications complementing anti-snake venom.
Collapse
Affiliation(s)
- Manuganahalli B Nandana
- Department of Studies in Biochemistry, University of Mysore, Manasagangotri, Mysore, Karnataka, 570006, India; Department of Studies in Molecular Biology, University of Mysore, Manasagangotri, Mysore, Karnataka, 570006, India
| | - Madeva Bharatha
- Department of Studies in Biochemistry, University of Mysore, Manasagangotri, Mysore, Karnataka, 570006, India
| | - Raju Praveen
- Department of Studies in Biochemistry, University of Mysore, Manasagangotri, Mysore, Karnataka, 570006, India
| | - Spandan Nayaka
- Department of Studies in Biochemistry, University of Mysore, Manasagangotri, Mysore, Karnataka, 570006, India
| | - Bannikuppe S Vishwanath
- Department of Studies in Biochemistry, University of Mysore, Manasagangotri, Mysore, Karnataka, 570006, India.
| | - Rajesh Rajaiah
- Department of Studies in Molecular Biology, University of Mysore, Manasagangotri, Mysore, Karnataka, 570006, India.
| |
Collapse
|
2
|
Sun L, Wang Z, Liu Z, Mu G, Cui Y, Xiang Q. C-type lectin-like receptor 2: roles and drug target. Thromb J 2024; 22:27. [PMID: 38504248 PMCID: PMC10949654 DOI: 10.1186/s12959-024-00594-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 03/07/2024] [Indexed: 03/21/2024] Open
Abstract
C-type lectin-like receptor-2 (CLEC-2) is a member of the C-type lectin superfamily of cell surface receptors. The first confirmed endogenous and exogenous ligands of CLEC-2 are podoplanin and rhodocytin, respectively. CLEC-2 is expressed on the surface of platelets, which participates in platelet activation and aggregation by binding with its ligands. CLEC-2 and its ligands are involved in pathophysiological processes, such as atherosclerosis, cancer, inflammatory thrombus status, maintenance of vascular wall integrity, and cancer-related thrombosis. In the last 5 years, different anti- podoplanin antibody types have been developed for the treatment of cancers, such as glioblastoma and lung cancer. New tests and new diagnostics targeting CLEC-2 are also discussed. CLEC-2 mediates thrombosis in various pathological states, but CLEC-2-specific deletion does not affect normal hemostasis, which would provide a new therapeutic tool for many thromboembolic diseases. The CLEC-2-podoplanin interaction is a target for cancer treatment. CLEC-2 may be applied in clinical practice and play a therapeutic role.
Collapse
Affiliation(s)
- Lan Sun
- Department of Pharmacy, Peking University First Hospital, No. 6, Da Hong Luo Chang Street, Xicheng District, Beijing, 100034, China
- Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China
| | - Zhe Wang
- Department of Pharmacy, Peking University First Hospital, No. 6, Da Hong Luo Chang Street, Xicheng District, Beijing, 100034, China
- Institute of Clinical Pharmacology, Peking University, Beijing, China
| | - Zhiyan Liu
- Department of Pharmacy, Peking University First Hospital, No. 6, Da Hong Luo Chang Street, Xicheng District, Beijing, 100034, China
- Institute of Clinical Pharmacology, Peking University, Beijing, China
| | - Guangyan Mu
- Department of Pharmacy, Peking University First Hospital, No. 6, Da Hong Luo Chang Street, Xicheng District, Beijing, 100034, China
- Institute of Clinical Pharmacology, Peking University, Beijing, China
| | - Yimin Cui
- Department of Pharmacy, Peking University First Hospital, No. 6, Da Hong Luo Chang Street, Xicheng District, Beijing, 100034, China
- Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China
- Institute of Clinical Pharmacology, Peking University, Beijing, China
| | - Qian Xiang
- Department of Pharmacy, Peking University First Hospital, No. 6, Da Hong Luo Chang Street, Xicheng District, Beijing, 100034, China.
- Institute of Clinical Pharmacology, Peking University, Beijing, China.
| |
Collapse
|
3
|
Luo P, Ji Y, Liu X, Zhang W, Cheng R, Zhang S, Qian X, Huang C. Affected inflammation-related signaling pathways in snake envenomation: A recent insight. Toxicon 2023; 234:107288. [PMID: 37703930 DOI: 10.1016/j.toxicon.2023.107288] [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: 07/23/2023] [Revised: 08/24/2023] [Accepted: 09/09/2023] [Indexed: 09/15/2023]
Abstract
Snake envenomation is well known to cause grievous pathological signs, including haemorrhagic discharge, necrosis, and respiratory distress. However, inflammatory reactions are also common envenoming manifestations that lead to successive damage, such as oedema, ulceration, lymphadenectasis, systemic inflammatory response syndrome (SIRS) and even multiple organ dysfunction syndrome (MODS). Interference with the inflammatory burst is hence important in the clinical treatment of snake envenomation. Here, we summarize the typical snake toxins (or venoms) that cause inflammatory reactions and the underlying signaling pathways. In brief, inflammatory reactions are usually triggered by snake venom phospholipase A2 (svPLA2), snake venom metalloprotease (SVMP), snake venom serine protease (SVSP) and C-type lectin/snaclec (CTL) as well as disintegrin (DIS) via multiple signaling pathways. They are nucleotide-binding oligomerization domain, leucine-rich repeat and pyrin domain-containing 3 (NLRP3), nuclear factor kappa-B (NF-κB), mitogen-activated protein kinase (MAPK), janus kinase/signal transducer and activator of transcription (JAK-STAT) and phosphoinositide 3-Kinase/protein kinase B (PI3K/PKB also called PI3K-AKT) signaling pathways. Activation of these pathways promotes the expression of pro-inflammatory molecules such as cytokines, especially interleukin-1β (IL-1β) which causes further inflammatory cascades and manifestations, such as swelling, fever, pain, and severe complications. Remarkably, almost half of introduced snake toxins (or venoms) have anti-inflammatory effects through blocking these pathways and suppressing the expression of pro-inflammatory molecules. Investigation of affected inflammation-related signaling pathways is meaningful to achieve better clinical treatment.
Collapse
Affiliation(s)
- Peiyi Luo
- Queen Mary School, Nanchang University, Nanchang, Jiangxi, 330000, PR China.
| | - Yuxin Ji
- Queen Mary School, Nanchang University, Nanchang, Jiangxi, 330000, PR China.
| | - Xiaohan Liu
- Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, PR China.
| | - Weiyun Zhang
- Queen Mary School, Nanchang University, Nanchang, Jiangxi, 330000, PR China.
| | - Ruoxi Cheng
- Queen Mary School, Nanchang University, Nanchang, Jiangxi, 330000, PR China.
| | - Shuxian Zhang
- Queen Mary School, Nanchang University, Nanchang, Jiangxi, 330000, PR China.
| | - Xiao Qian
- Queen Mary School, Nanchang University, Nanchang, Jiangxi, 330000, PR China.
| | - Chunhong Huang
- College of Basic Medical Sciences, Nanchang University, Nanchang, Jiangxi, 330000, PR China.
| |
Collapse
|
4
|
Yadav M, Akhtar MN, Mishra M, Kumar S, Kumar R, Shubham, Nandal A, Sen P. Leishmania donovani Attenuates Dendritic Cell Trafficking to Lymph Nodes by Inhibiting C-Type Lectin Receptor 2 Expression via Transforming Growth Factor-β. Microbiol Spectr 2023; 11:e0412222. [PMID: 37125906 PMCID: PMC10269552 DOI: 10.1128/spectrum.04122-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 04/10/2023] [Indexed: 05/02/2023] Open
Abstract
To initiate an antileishmanial adaptive immune response, dendritic cells (DCs) must carry Leishmania antigens from peripheral tissues to local draining lymph nodes. However, the migratory capacity of DCs is largely compromised during Leishmania donovani infection. The molecular mechanism underlying this defective DC migration is not yet fully understood. Here, we demonstrate that L. donovani infection impaired the lymph node homing ability of DCs by decreasing C-type lectin receptor 2 (CLEC-2) expression. L. donovani exerted this inhibitory effect by inducing transforming growth factor-β (TGF-β) secretion from DCs. Indeed, TGF-β produced in this manner inhibited nuclear factor-κB (NF-κB)-mediated CLEC-2 expression on DCs by activating c-Src. Notably, suppression of c-Src expression significantly improved the arrival of DCs in draining lymph nodes by preventing L. donovani-induced CLEC-2 downregulation on DCs. These findings reveal a unique mechanism by which L. donovani inhibits DC migration to lymph nodes and suggest a key role for TGF-β, c-Src, and CLEC-2 in regulating this process. IMPORTANCE Dendritic cells (DCs) play a key role in initiating T cell-mediated protective immunity against visceral leishmaniasis (VL), the second most lethal parasitic disease in the world. However, the T cell-inducing ability of DCs critically depends on the extent of DC migration to regional lymph nodes. Notably, the migration of DCs is reported to be impaired during VL. The cause of this impaired DC migration, however, remains ill-defined. Here, we provide the first evidence that L. donovani, the causative agent of VL, attenuates the lymph node homing capacity of DCs by decreasing C-type lectin receptor 2 (CLEC-2) expression on DCs. Additionally, we have demonstrated how L. donovani mediates this inhibitory effect. Overall, our work has revealed a unique mechanism underlying L. donovani-induced impairment of DC migration and suggests a potential strategy to improve antileishmanial T cell activity by increasing DC arrival in lymph nodes.
Collapse
Affiliation(s)
- Manisha Yadav
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
| | - Md. Naushad Akhtar
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
| | - Manish Mishra
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
| | - Sandeep Kumar
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Raj Kumar
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
| | - Shubham
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Anil Nandal
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
| | - Pradip Sen
- Division of Cell Biology and Immunology, Council of Scientific and Industrial Research—Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| |
Collapse
|
5
|
Curcumin-Based Inhibitors of Thrombosis and Cancer Metastasis Promoting Factor CLEC 2 from Traditional Medicinal Species Curcuma longa. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:9344838. [PMID: 35082906 PMCID: PMC8786508 DOI: 10.1155/2022/9344838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 11/30/2021] [Indexed: 11/17/2022]
Abstract
The CLEC-2 receptor protein belongs to the C-type lectin superfamily of transmembrane receptors that have one or more C-type lectin-like domains. CLEC-2 is a physiological binding receptor of podoplanin (PDPN), which is expressed on specific tumour cell types and involved in tumour cell-induced platelet aggregation and tumour metastasis. CLEC-2 and podoplanin-expressing tumour cells interact to increase angiogenesis, tumour development, and metastasis. CLEC-2 is a hemi-immunoreceptor tyrosine-based activation motif (hemi-ITAM) receptor located on platelets and a subset of dendritic cells that are expressed constitutively. This molecule is secreted by activated platelets around tumours and has been shown to inhibit platelet aggregation and tumour metastasis in colon carcinoma by binding to the surface of tumour cells. Pharmacokinetic studies were carried using a DrugLiTo, and molecular docking was performed using AutoDock Tools 1.5.6 (ADT). Twenty-nine bioactive compounds were included in the study, and four of them, namely, piperine, dihydrocurcumin, bisdemethoxycurcumin, and demothoxycurcumin, showed potential antagonist properties against the target. The resultant best bioactive was compared with commercially available standard drugs. Further, validation of respective compounds with an intensive molecular dynamics simulation was performed using Schrödinger software. To the best of our knowledge, this is the first report on major bioactive found on clove as natural antagonists for CLEC-2 computationally. To further validate the bioactive and delimit the screening process of potential drugs against CLEC-2, in vitro and in vivo studies are needed to prove their efficacy.
Collapse
|
6
|
Elchaninov A, Lokhonina A, Vishnyakova P, Soboleva A, Poltavets A, Artemova D, Makarov A, Glinkina V, Goldshtein D, Bolshakova G, Sukhikh G, Fatkhudinov T. MARCO + Macrophage Dynamics in Regenerating Liver after 70% Liver Resection in Mice. Biomedicines 2021; 9:biomedicines9091129. [PMID: 34572315 PMCID: PMC8471044 DOI: 10.3390/biomedicines9091129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 08/25/2021] [Accepted: 08/28/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Macrophages play a key role in liver regeneration. The fates of resident macrophages after 70% resection are poorly investigated. In this work, using the MARCO macrophage marker (abbreviated from macrophage receptor with collagenous structure), we studied the dynamics of mouse liver resident macrophages after 70% resection. METHODS In BALB/c male mice, a model of liver regeneration after 70% resection was reproduced. The dynamics of markers CD68, TIM4, and MARCO were studied immunohistochemically and by using a Western blot. RESULTS The number of MARCO- and CD68-positive macrophages in the regenerating liver increased 1 day and 3 days after resection, respectively. At the same time, the content of the MARCO protein increased in the sorted macrophages of the regenerating liver on the third day. CONCLUSIONS The data indicate that the number of MARCO-positive macrophages in the regenerating liver increases due to the activation of MARCO synthesis in the liver macrophages. The increased expression of MARCO by macrophages can be regarded as a sign of their activation. In the present study, stimulation with LPS led to an increase in the expression of the Marco gene in both Kupffer cells and macrophages of bone marrow origin.
Collapse
Affiliation(s)
- Andrey Elchaninov
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (A.L.); (P.V.); (A.P.); (G.S.)
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia; (A.M.); (T.F.)
- Correspondence:
| | - Anastasia Lokhonina
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (A.L.); (P.V.); (A.P.); (G.S.)
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia; (A.M.); (T.F.)
| | - Polina Vishnyakova
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (A.L.); (P.V.); (A.P.); (G.S.)
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia; (A.M.); (T.F.)
| | - Anna Soboleva
- Laboratory of Growth and Development, Scientific Research Institute of Human Morphology, 117418 Moscow, Russia; (A.S.); (D.A.); (G.B.)
| | - Anastasiya Poltavets
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (A.L.); (P.V.); (A.P.); (G.S.)
| | - Daria Artemova
- Laboratory of Growth and Development, Scientific Research Institute of Human Morphology, 117418 Moscow, Russia; (A.S.); (D.A.); (G.B.)
| | - Andrey Makarov
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia; (A.M.); (T.F.)
| | - Valeria Glinkina
- Histology Department, Pirogov Russian National Research Medical University, Ministry of Healthcare of the Russian Federation, 117997 Moscow, Russia;
| | - Dmitry Goldshtein
- Stem Cell Genetics Laboratory, Research Centre for Medical Genetics, 115522 Moscow, Russia;
| | - Galina Bolshakova
- Laboratory of Growth and Development, Scientific Research Institute of Human Morphology, 117418 Moscow, Russia; (A.S.); (D.A.); (G.B.)
| | - Gennady Sukhikh
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (A.L.); (P.V.); (A.P.); (G.S.)
| | - Timur Fatkhudinov
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia; (A.M.); (T.F.)
- Laboratory of Growth and Development, Scientific Research Institute of Human Morphology, 117418 Moscow, Russia; (A.S.); (D.A.); (G.B.)
| |
Collapse
|
7
|
Jarosz ŁS, Ciszewski A, Grabowski S, Marek A, Grądzki Z, Żylińska B, Rysiak A. The effect of feed supplementation with a copper-glycine chelate and copper sulphate on cellular and humoral immune parameters in chickens. FOOD AGR IMMUNOL 2021. [DOI: 10.1080/09540105.2021.1954143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Łukasz S. Jarosz
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland
| | - Artur Ciszewski
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland
| | - Sebastian Grabowski
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland
| | - Agnieszka Marek
- Sub-Department of Preventive Veterinary and Avian Diseases, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, University of Life Sciences in Lublin, Lublin, Poland
| | - Zbigniew Grądzki
- Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland
| | - Beata Żylińska
- Department and Clinic of Animal Surgery, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland
| | - Anna Rysiak
- Department of Botany, Mycology, and Ecology, Maria Curie-Skłodowska University, Lublin, Poland
| |
Collapse
|
8
|
Meng D, Luo M, Liu B. The Role of CLEC-2 and Its Ligands in Thromboinflammation. Front Immunol 2021; 12:688643. [PMID: 34177942 PMCID: PMC8220156 DOI: 10.3389/fimmu.2021.688643] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/24/2021] [Indexed: 12/17/2022] Open
Abstract
C-type lectin-like receptor 2 (CLEC-2, also known as CLEC-1b) is expressed on platelets, Kupffer cells and other immune cells, and binds to various ligands including the mucin-like protein podoplanin (PDPN). The role of CLEC-2 in infection and immunity has become increasingly evident in recent years. CLEC-2 is involved in platelet activation, tumor cell metastasis, separation of blood/lymphatic vessels, and cerebrovascular patterning during embryonic development. In this review, we have discussed the role of CLEC-2 in thromboinflammation, and focused on the recent research.
Collapse
Affiliation(s)
- Danyang Meng
- Department of Neurology, Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Man Luo
- Department of Neurology, Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Beibei Liu
- Department of Central Laboratory, Affiliated Hospital of Jiaxing University, Jiaxing, China
| |
Collapse
|
9
|
Otake S, Sasaki T, Shirai T, Tsukiji N, Tamura S, Takano K, Ozaki Y, Suzuki-Inoue K. CLEC-2 stimulates IGF-1 secretion from podoplanin-positive stromal cells and positively regulates erythropoiesis in mice. J Thromb Haemost 2021; 19:1572-1584. [PMID: 33774924 DOI: 10.1111/jth.15317] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 03/03/2021] [Accepted: 03/18/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Erythropoiesis is a complex multistep process by which erythrocytes are produced. C-type lectin-like receptor 2 (CLEC-2) is a podoplanin (PDPN) receptor almost exclusively expressed on the surface of platelets and megakaryocytes. Deletion of megakaryocyte/platelet CLEC-2 was reported to cause anemia along with thrombocytopenia in mice. PDPN-expressing stromal cells in the bone marrow (BM) were also reported to facilitate megakaryocyte expansion and maturation depending on the CLEC-2/PDPN interaction. OBJECTIVES We investigated how specific deletion of CLEC-2 in megakaryocytes/platelets leads to anemia. METHODS We used flow cytometry to analyze maturation of erythroblasts, apoptotic cell death, and cell cycle distribution. CLEC-2 stimulated PDPN-expressing stromal cell-conditioned medium was analyzed by cytokine array and ELISA, and co-cultured with immature erythroblasts. Cytokine levels in serum and BM extracellular fluid were quantified by ELISA. RESULTS We observed increased apoptosis of BM erythroblasts in megakaryocyte/platelet-specific CLEC-2 conditional knockout (Clec1bΔPLT ) mice. Moreover, PDPN-expressing stromal cells in the BM secreted insulin-like growth factor 1 (IGF-1) depending on the CLEC-2/PDPN interaction. Pretreatment with IGF-1 receptor inhibitor increased apoptosis rate and decreased the proliferation of erythroblasts in vitro. Furthermore, in Clec1bΔPLT mice, IGF-1 concentrations in serum and BM extracellular fluid were decreased, and IGF-1 replacement in Clec1bΔPLT mice attenuated anemia. CONCLUSIONS Our findings suggest that IGF-1 secretion from PDPN-expressing stromal cells by CLEC-2 stimulation positively regulates erythroblasts. This novel mechanism of erythropoiesis regulation indicates that a microenvironment consisting of megakaryocytes and PDPN-expressing stromal cells supports erythropoiesis.
Collapse
Affiliation(s)
- Shimon Otake
- Department of Clinical Laboratory, University of Yamanashi Hospital, Chuo, Japan
| | - Tomoyuki Sasaki
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Japan
| | - Toshiaki Shirai
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Japan
| | - Nagaharu Tsukiji
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Japan
| | - Shogo Tamura
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Katsuhiro Takano
- Division of Transfusion Medicine and Cell Therapy, University of Yamanashi Hospital, Chuo, Japan
| | | | - Katsue Suzuki-Inoue
- Department of Clinical Laboratory, University of Yamanashi Hospital, Chuo, Japan
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Japan
| |
Collapse
|
10
|
Cimini M, Kishore R. Role of Podoplanin-Positive Cells in Cardiac Fibrosis and Angiogenesis After Ischemia. Front Physiol 2021; 12:667278. [PMID: 33912076 PMCID: PMC8072458 DOI: 10.3389/fphys.2021.667278] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 03/15/2021] [Indexed: 01/05/2023] Open
Abstract
New insights into the cellular and extra-cellular composition of scar tissue after myocardial infarction (MI) have been identified. Recently, a heterogeneous podoplanin-expressing cell population has been associated with fibrogenic and inflammatory responses and lymphatic vessel growth during scar formation. Podoplanin is a mucin-like transmembrane glycoprotein that plays an important role in heart development, cell motility, tumorigenesis, and metastasis. In the adult mouse heart, podoplanin is expressed only by cardiac lymphatic endothelial cells; after MI, it is acquired with an unexpected heterogeneity by PDGFRα-, PDGFRβ-, and CD34-positive cells. Podoplanin may therefore represent a sign of activation of a cohort of progenitor cells during different phases of post-ischemic myocardial wound repair. Podoplanin binds to C-type lectin-like receptor 2 (CLEC-2) which is exclusively expressed by platelets and a variety of immune cells. CLEC-2 is upregulated in CD11bhigh cells, including monocytes and macrophages, following inflammatory stimuli. We recently published that inhibition of the interaction between podoplanin-expressing cells and podoplanin-binding cells using podoplanin-neutralizing antibodies reduces but does not fully suppress inflammation post-MI while improving heart function and scar composition after ischemic injury. These data support an emerging and alternative mechanism of interactome in the heart that, when neutralized, leads to altered inflammatory response and preservation of cardiac function and structure. The overarching objective of this review is to assimilate and discuss the available evidence on the functional role of podoplanin-positive cells on cardiac fibrosis and remodeling. A detailed characterization of cell-to-cell interactions and paracrine signals between podoplanin-expressing cells and the other type of cells that compose the heart tissue is needed to open a new line of investigation extending beyond the known function of these cells. This review attempts to discuss the role and biology of podoplanin-positive cells in the context of cardiac injury, repair, and remodeling.
Collapse
Affiliation(s)
- Maria Cimini
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States
| | - Raj Kishore
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States
| |
Collapse
|
11
|
Jebali J, Zakraoui O, Aissaoui D, Abdelkafi-Koubaa Z, Srairi-Abid N, Marrakchi N, Essafi-Benkhadir K. Lebecetin, a snake venom C-type lectin protein, modulates LPS-induced inflammatory cytokine production in human THP-1-derived macrophages. Toxicon 2020; 187:144-150. [PMID: 32918926 DOI: 10.1016/j.toxicon.2020.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/11/2020] [Accepted: 09/07/2020] [Indexed: 10/25/2022]
Abstract
The excessive production of inflammatory mediators results in an overactive immune response leading to the worsening of various human diseases. Thus, there is a still need to identify molecules able to regulate the inflammatory response. Lebecetin, a C-type lectin protein isolated from Macrovipera lebetina snake venom, was previously characterized as a platelet aggregation inhibitor and antitumor active biomolecule. In the present work, we investigated its effect on the production of some cytokines linked to inflammatory response and the underlying mechanisms in lipopolysaccharide (LPS)-induced THP1 macrophages. Interestingly, we found that lebecetin reduced the levels of the pro-inflammatory cytokines TNF-α, IL-6, and IL-8 while it partially increased LPS-induced secretion of the immunomodulatory cytokine IL-10. Furthermore, this modulatory effect was accompanied by decreased activation of ERK1/2, p38, AKT kinases and NF-κB along with reduced expression of αvβ3 integrin. Thus, this study highlights the promising role of lebecetin as a natural biomolecule that could manage the inflammatory response involved in the development and progression of inflammatory diseases.
Collapse
Affiliation(s)
- Jed Jebali
- Institut Pasteur de Tunis, LR11IPT08/LR16IPT08 Laboratoire des Venins et Molécules Thérapeutiques, 1002, Tunis, Tunisia; Université de Tunis El Manar, 1068, Tunis, Tunisia.
| | - Ons Zakraoui
- Institut Pasteur de Tunis, LR11IPT04/LR16IPT04 Laboratoire d'Epidémiologie Moléculaire et de Pathologie Expérimentale Appliquée Aux Maladies Infectieuses, 1002, Tunis, Tunisia; Université de Tunis El Manar, 1068, Tunis, Tunisia
| | - Dorra Aissaoui
- Institut Pasteur de Tunis, LR11IPT08/LR16IPT08 Laboratoire des Venins et Molécules Thérapeutiques, 1002, Tunis, Tunisia; Université de Tunis El Manar, 1068, Tunis, Tunisia
| | - Zaineb Abdelkafi-Koubaa
- Institut Pasteur de Tunis, LR11IPT08/LR16IPT08 Laboratoire des Venins et Molécules Thérapeutiques, 1002, Tunis, Tunisia; Université de Tunis El Manar, 1068, Tunis, Tunisia
| | - Najet Srairi-Abid
- Institut Pasteur de Tunis, LR11IPT08/LR16IPT08 Laboratoire des Venins et Molécules Thérapeutiques, 1002, Tunis, Tunisia; Université de Tunis El Manar, 1068, Tunis, Tunisia
| | - Naziha Marrakchi
- Institut Pasteur de Tunis, LR11IPT08/LR16IPT08 Laboratoire des Venins et Molécules Thérapeutiques, 1002, Tunis, Tunisia; Université de Tunis El Manar, 1068, Tunis, Tunisia; Faculté de Médecine de Tunis, Tunis, Tunisia
| | - Khadija Essafi-Benkhadir
- Institut Pasteur de Tunis, LR11IPT04/LR16IPT04 Laboratoire d'Epidémiologie Moléculaire et de Pathologie Expérimentale Appliquée Aux Maladies Infectieuses, 1002, Tunis, Tunisia; Université de Tunis El Manar, 1068, Tunis, Tunisia.
| |
Collapse
|
12
|
Suzuki‐Inoue K, Tsukiji N. Platelet CLEC-2 and lung development. Res Pract Thromb Haemost 2020; 4:481-490. [PMID: 32548549 PMCID: PMC7292670 DOI: 10.1002/rth2.12338] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 02/05/2020] [Accepted: 02/08/2020] [Indexed: 01/23/2023] Open
Abstract
In this article, the State of the Art lecture "Platelet CLEC-2 and Lung Development" presented at the ISTH congress 2019 is reviewed. During embryonic development, blood cells are often considered as porters of nutrition and oxygen but not as active influencers of cell differentiation. However, recent studies revealed that platelets actively facilitate cell differentiation by releasing biological substances during development. C-type lectin-like receptor 2 (CLEC-2) has been identified as a receptor for the platelet-activating snake venom rhodocytin. An endogenous ligand of CLEC-2 is the membrane protein podoplanin (PDPN), which is expressed on the surface of certain types of tumor cells and lymphatic endothelial cells (LECs). Deletion of CLEC-2 from platelets in mice results in death just after birth due to lung malformation and blood/lymphatic vessel separation. During development, lymphatic vessels are derived from cardinal veins. At this stage, platelets are activated by binding of CLEC-2 to LEC PDPN and release trandforming growth factor-β (TGF-β). This cytokine inhibits LEC migration and proliferation, facilitating blood/lymphatic vessel separation. TGF-β released upon platelet-expressed CLEC-2/LEC PDPN also facilitates differentiation of lung mesothelial cells into alveolar duct myofibroblasts (adMYFs) in the developing lung. AdMYFs generate elastic fibers inside the lung, so that the lung can be properly inflated. Thus, platelets act as an ultimate natural drug delivery system that enables biological substances to be specifically delivered to the target at high concentrations by receptor/ligand interactions during development.
Collapse
Affiliation(s)
- Katsue Suzuki‐Inoue
- Department of Clinical and Laboratory MedicineFaculty of MedicineUniversity of YamanashiChuoJapan
| | - Nagaharu Tsukiji
- Department of Clinical and Laboratory MedicineFaculty of MedicineUniversity of YamanashiChuoJapan
| |
Collapse
|
13
|
Salazar E, Salazar AM, Taylor P, Urdanibia I, Pérez K, Rodríguez-Acosta A, Sánchez EE, Guerrero B. Contribution of endothelial cell and macrophage activation in the alterations induced by the venom of Micrurus tener tener in C57BL/6 mice. Mol Immunol 2019; 116:45-55. [PMID: 31600647 DOI: 10.1016/j.molimm.2019.09.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 06/12/2019] [Accepted: 09/04/2019] [Indexed: 02/02/2023]
Abstract
An acute inflammatory response, cellular infiltrates, anemia, hemorrhage and endogenous fibrinolysis activation were previously described in C57BL/6 mice injected with M. tener tener venom (Mtt). As the endothelium and innate immunity may participate in these disturbances and due to our poor understanding of the alterations produced by these venoms when the neurotoxic component is not predominant, we evaluated the effects in an in vitro model. At 24 h, the release of pro-inflammatory mediators was detected in peritoneal macrophages. At different times, the release of pro-inflammatory (TNF-α, IL-6, NO and E-Selectin), pro-coagulant (vWF and TF) and pro-fibrinolytic (uPA) mediators were seen in liver sinusoidal endothelial cells (LSECs). These results suggest that Mtt venom activates macrophages and endothelium, thus inducing the release of mediators, such as TNF-α, that orchestrate the acute inflammatory response and the later infiltration of mononuclear cells into liver in C57BL/6 mice. In addition, endothelium activation promotes TF expression, which may in turn modulate the inflammatory and hemostatic response. These findings suggest crosstalk between inflammation and hemostasis in the alterations observed in Micrurus envenomation, where the neurotoxic manifestations do not predominate.
Collapse
Affiliation(s)
- Emelyn Salazar
- Laboratorio de Fisiopatología, Centro de Medicina Experimental, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela; National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, MSC 158, Kingsville, TX 78363, USA
| | - Ana María Salazar
- Laboratorio de Fisiopatología, Centro de Medicina Experimental, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela
| | - Peter Taylor
- Laboratorio de Patología Celular y Molecular, Instituto Venezolano de Investigaciones Científicas (IVIC) 1020A, Caracas, Venezuela
| | - Izaskun Urdanibia
- Laboratorio de Patología Celular y Molecular, Instituto Venezolano de Investigaciones Científicas (IVIC) 1020A, Caracas, Venezuela
| | - Karin Pérez
- Laboratorio de Fisiopatología, Centro de Medicina Experimental, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela
| | - Alexis Rodríguez-Acosta
- Laboratorio de Inmunoquímica y Ultraestructura, Instituto Anatómico de la Universidad Central de Venezuela 1051, Caracas, Venezuela
| | - Elda E Sánchez
- National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, MSC 158, Kingsville, TX 78363, USA
| | - Belsy Guerrero
- Laboratorio de Fisiopatología, Centro de Medicina Experimental, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela.
| |
Collapse
|
14
|
de Winde CM, Matthews AL, van Deventer S, van der Schaaf A, Tomlinson ND, Jansen E, Eble JA, Nieswandt B, McGettrick HM, Figdor CG, Tomlinson MG, Acton SE, van Spriel AB. C-type lectin-like receptor 2 (CLEC-2)-dependent dendritic cell migration is controlled by tetraspanin CD37. J Cell Sci 2018; 131:jcs214551. [PMID: 30185523 DOI: 10.1242/jcs.214551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 08/23/2018] [Indexed: 12/15/2022] Open
Abstract
Cell migration is central to evoking a potent immune response. Dendritic cell (DC) migration to lymph nodes is dependent on the interaction of C-type lectin-like receptor 2 (CLEC-2; encoded by the gene Clec1b), expressed by DCs, with podoplanin, expressed by lymph node stromal cells, although the underlying molecular mechanisms remain elusive. Here, we show that CLEC-2-dependent DC migration is controlled by tetraspanin CD37, a membrane-organizing protein. We identified a specific interaction between CLEC-2 and CD37, and myeloid cells lacking CD37 (Cd37-/-) expressed reduced surface CLEC-2. CLEC-2-expressing Cd37-/- DCs showed impaired adhesion, migration velocity and displacement on lymph node stromal cells. Moreover, Cd37-/- DCs failed to form actin protrusions in a 3D collagen matrix upon podoplanin-induced CLEC-2 stimulation, phenocopying CLEC-2-deficient DCs. Microcontact printing experiments revealed that CD37 is required for CLEC-2 recruitment in the membrane to its ligand podoplanin. Finally, Cd37-/- DCs failed to inhibit actomyosin contractility in lymph node stromal cells, thus phenocopying CLEC-2-deficient DCs. This study demonstrates that tetraspanin CD37 controls CLEC-2 membrane organization and provides new molecular insights into the mechanisms underlying CLEC-2-dependent DC migration.This article has an associated First Person interview with the first author of the paper.
Collapse
Affiliation(s)
- Charlotte M de Winde
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Tumor Immunology, 6525 GA Nijmegen, The Netherlands
- MRC Laboratory of Molecular Cell Biology, University College London, London WC1E 6BT, UK
| | | | - Sjoerd van Deventer
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Tumor Immunology, 6525 GA Nijmegen, The Netherlands
| | - Alie van der Schaaf
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Tumor Immunology, 6525 GA Nijmegen, The Netherlands
| | - Neil D Tomlinson
- Institute of Cardiovascular Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Erik Jansen
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Tumor Immunology, 6525 GA Nijmegen, The Netherlands
| | - Johannes A Eble
- Institute for Physiological Chemistry and Pathobiochemistry, D-48149 Münster, Germany
| | - Bernhard Nieswandt
- University Clinic of Würzburg and Rudolf Virchow Center for Experimental Biomedicine, 97070 Würzburg, Germany
| | - Helen M McGettrick
- Institute of Inflammation and Ageing, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Carl G Figdor
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Tumor Immunology, 6525 GA Nijmegen, The Netherlands
| | - Michael G Tomlinson
- School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK
- Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, Midlands, UK
| | - Sophie E Acton
- MRC Laboratory of Molecular Cell Biology, University College London, London WC1E 6BT, UK
| | - Annemiek B van Spriel
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Tumor Immunology, 6525 GA Nijmegen, The Netherlands
| |
Collapse
|
15
|
Suzuki-Inoue K. Roles of the CLEC-2-podoplanin interaction in tumor progression. Platelets 2018; 29:1-7. [PMID: 29863945 DOI: 10.1080/09537104.2018.1478401] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/14/2018] [Accepted: 04/07/2018] [Indexed: 12/12/2022]
Abstract
Podoplanin is a type-I transmembrane sialomucin-like glycoprotein expressed on the surface of several kinds of tumor cells. The podoplanin receptor is a platelet activation receptor known as C-type lectin-like receptor 2 (CLEC-2), which has been identified as a receptor for the platelet-activating snake venom protein rhodocytin. CLEC-2 is highly expressed in platelets and megakaryocytes and expressed at lower levels in liver Kupffer cells. Podoplanin is expressed in certain types of tumor cells, including squamous cell carcinomas, seminomas, and brain tumors. Podoplanin is also expressed in a wide range of normal cells, including fibroblastic reticular cells in lymph nodes, kidney podocytes, and lymphatic endothelial cells, but not vascular endothelial cells. Metastasis of podoplanin-positive lung tumors injected from the tail vein is greatly inhibited in CLEC-2-depleted mice or in anti-podoplanin antibody-treated mice. These findings suggest that the CLEC-2-podoplanin interaction facilitates hematogenous tumor metastasis. Platelets may increase the survival of tumor cells by covering tumor cells and physically protecting them from shear stress or immune cells in the bloodstream. Alternatively, platelets may stimulate the epithelial-mesenchymal transition of tumor cells to facilitate their extravasation from blood vessels. Cell proliferation is stimulated in podoplanin-expressing tumor cells by the coculture with platelets, but the effects of the CLEC-2-podoplanin interaction on tumor growth in vivo are not yet resolved. It is possible that the CLEC-2-podoplanin interaction facilitates tumor-related thrombosis, subsequent inflammation, inflammation-induced cachexia, and reduced survival. Considering these findings, anti-podoplanin and anti-CLEC-2 drugs are promising therapies for the prevention of tumor metastasis, progression, and tumor-related symptoms, which may result in longer survival in cancer patients. There are advantages and disadvantages of anti-podoplanin vs. anti-CLEC-2 therapy. Side effects in podoplanin-expressing normal tissues due to treatment with anti-podoplanin and temporal thrombocytopenia due to treatment with anti-CLEC2 are potential problems, although solutions to these problems have been reported.
Collapse
Affiliation(s)
- Katsue Suzuki-Inoue
- a Department of Clinical and Laboratory Medicine, Faculty of Medicine , University of Yamanashi , Yamanashi , Japan
| |
Collapse
|
16
|
Abstract
Tumor cell-induced platelet aggregation facilitates hematogenous metastasis by promoting tumor embolization, preventing immunological assaults and shear stress, and the platelet-releasing growth factors support tumor growth and invasion. Podoplanin, also known as Aggrus, is a type I transmembrane mucin-like glycoprotein and is expressed on wide range of tumor cells. Podoplanin has a role in platelet aggregation and metastasis formation through the binding to its platelet receptor, C-type lectin-like receptor 2 (CLEC-2). The podoplanin research was originally started from the cloning of highly metastatic NL-17 subclone from mouse colon 26 cancer cell line and from the establishment of 8F11 monoclonal antibody (mAb) that could neutralize NL-17-induced platelet aggregation and hematogenous metastasis. Later on, podoplanin was identified as the antigen of 8F11 mAb, and its ectopic expression brought to cells the platelet-aggregating abilities and hematogenous metastasis phenotypes. From the 8F11 mAb recognition epitopes, podoplanin is found to contain tandemly repeated, highly conserved motifs, designated platelet aggregation-stimulating (PLAG) domains. Series of analyses using the cells expressing the mutants and the established neutralizing anti-podoplanin mAbs uncovered that both PLAG3 and PLAG4 domains are associated with the CLEC-2 binding. The neutralizing mAbs targeting PLAG3 or PLAG4 could suppress podoplanin-induced platelet aggregation and hematogenous metastasis through inhibiting the podoplanin–CLEC-2 binding. Therefore, these domains are certainly functional in podoplanin-mediated metastasis through its platelet-aggregating activity. This review summarizes the platelet functions in metastasis formation, the role of platelet aggregation-inducing factor podoplanin in pathological and physiological situations, and the possibility to develop podoplanin-targeting drugs in the future.
Collapse
Affiliation(s)
- Ai Takemoto
- Division of Experimental Chemotherapy, The Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 135-8550, Japan
| | - Kenichi Miyata
- Division of Experimental Chemotherapy, The Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 135-8550, Japan
| | - Naoya Fujita
- Division of Experimental Chemotherapy, The Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 3-8-31, Ariake, Koto-ku, Tokyo, 135-8550, Japan.
| |
Collapse
|
17
|
Echeverría S, Leiguez E, Guijas C, do Nascimento NG, Acosta O, Teixeira C, Leiva LC, Rodríguez JP. Evaluation of pro-inflammatory events induced by Bothrops alternatus snake venom. Chem Biol Interact 2017; 281:24-31. [PMID: 29248447 DOI: 10.1016/j.cbi.2017.12.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/05/2017] [Accepted: 12/13/2017] [Indexed: 12/19/2022]
Abstract
Inflammation is a major local feature of envenomation by bothropic snakes being characterized by a prominent local edema, pain, and extensive swelling. There are reports demonstrating that whole Bothrops snake venoms and toxins isolated from them are able to activate macrophages functions, such as phagocytosis, production of reactive oxygen, cytokines and eicosanoids, however, little is known about the effects of Bothrops alternatus (B.a.) venom on macrophages. In this work, we evaluated the proinflammatory effects of B.a. venom with in vivo and in vitro experiments using the Raw 264.7 cell line and mouse peritoneal macrophages. We detected that B.a. venom augments cell permeability (2-fold), and cellular extravasation (mainly neutrophils), increase proinflammatory cytokines IL1 (∼300-fold), IL12 (∼200-fold), and TNFα (∼80-fold) liberation and induce the expression of enzymes related to lipid signaling, such as cPLA2α and COX-2. Additionally, using lipidomic techniques we detected that this venom produces a release of arachidonic acid (∼10 nMol/mg. Protein) and other fatty acids (16:0 and 18:1 n-9c). Although much of these findings were described in inflammatory processes induced by other bothropic venoms, here we demonstrate that B.a. venom also stimulates pro-inflammatory pathways involving lipid mediators of cell signaling. In this sense, lipidomics analysis of macrophages stimulated with B.a. venom evidenced that the main free fatty acids are implicated in the inflammatory response, and also demonstrated that this venom, is able to activate lipid metabolism even with a low content of PLA2.
Collapse
Affiliation(s)
- Silvina Echeverría
- Laboratorio de Investigación en Proteínas, Instituto de Química Básica y Aplicada del Nordeste Argentino (UNNE - CONICET), Argentina
| | - Elbio Leiguez
- Laboratorio de Farmacología, Instituto Butantan, Sao Paulo, Sao Paulo State, Brazil
| | - Carlos Guijas
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas, Universidad de Valladolid, 47003 Valladolid, Spain
| | | | - Ofelia Acosta
- Laboratorio de Farmacología, Facultad de Ciencias Veterinarias, Universidad Nacional del Nordeste (UNNE), Argentina
| | - Catarina Teixeira
- Laboratorio de Farmacología, Instituto Butantan, Sao Paulo, Sao Paulo State, Brazil
| | - Laura C Leiva
- Laboratorio de Investigación en Proteínas, Instituto de Química Básica y Aplicada del Nordeste Argentino (UNNE - CONICET), Argentina
| | - Juan Pablo Rodríguez
- Laboratorio de Investigación en Proteínas, Instituto de Química Básica y Aplicada del Nordeste Argentino (UNNE - CONICET), Argentina.
| |
Collapse
|
18
|
Purification and characterization of Cc-Lec, C-type lactose-binding lectin: A platelet aggregation and blood-clotting inhibitor from Cerastes cerastes venom. Int J Biol Macromol 2017; 102:336-350. [DOI: 10.1016/j.ijbiomac.2017.04.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 04/03/2017] [Accepted: 04/05/2017] [Indexed: 12/30/2022]
|
19
|
Suzuki-Inoue K, Osada M, Ozaki Y. Physiologic and pathophysiologic roles of interaction between C-type lectin-like receptor 2 and podoplanin: partners from in utero to adulthood. J Thromb Haemost 2017; 15:219-229. [PMID: 27960039 DOI: 10.1111/jth.13590] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/25/2016] [Indexed: 08/31/2023]
Abstract
A platelet activation receptor, C-type lectin-like receptor 2 (CLEC-2), has been identified as a receptor for a platelet-activating snake venom, rhodocytin. CLEC-2 protein is highly expressed in platelets/megakaryocytes, and at lower levels in liver Kupffer cells. Recently, podoplanin has been revealed as an endogenous ligand for CLEC-2. Podoplanin is expressed in certain types of tumor cells, fibroblastic reticular cells (FRCs) in lymph nodes, kidney podocytes, and lymphatic endothelial cells, but not in vascular endothelial cells. CLEC-2 in platelets cannot have access to podoplanin under normal conditions, but they interact with each other under pathologic conditions or during developmental stages, and play various pathophysiologic roles. CLEC-2 facilitates hematogenous metastasis of podoplanin-expressing tumors. During development, the interaction between CLEC-2 and podoplanin in lymphatic endothelial cells or neuroepithelial cells facilitates blood-lymphatic vessel separation and cerebrovascular patterning and integrity, respectively. In adulthood, platelet CLEC-2 binding to FRCs is crucial for maintenance of the integrity of high endothelial venules in lymph nodes. Podoplanin-expressing FRC-like cells have recently been identified in the bone marrow, and facilitate megakaryocyte proliferation and proplatelet formation by binding to megakaryocyte CLEC-2. Podoplanin is inducibly expressed in liver monocytes and keratinocytes during Salmonella infection and wound healing, and regulates thrombus formation in the liver and controlled wound healing, respectively. By binding to unknown ligands, platelet CLEC-2 regulates the maintenance of vascular integrity during inflammation, thrombus stability under flow, and maintenance of quiescence of hematopoietic stem cells. Podoplanin is expressed in various cells, and additional roles of the CLEC-2-podoplanin interaction will be revealed in the future.
Collapse
Affiliation(s)
- K Suzuki-Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| | - M Osada
- School of Medical Technology, Faculty of Healthcare Science, Gunma Paz College, Gunma, Japan
| | - Y Ozaki
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| |
Collapse
|
20
|
Taylor P, Salazar E, Barrios M, Salazar AM, Abad MJ, Urdanibia I, Shealy D, Arocha-Piñango CL, Guerrero B. Role of the inflammatory response in the hemorrhagic syndrome induced by the hemolymph of the caterpillar Lonomia achelous. Toxicon 2016; 121:77-85. [DOI: 10.1016/j.toxicon.2016.08.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 08/19/2016] [Accepted: 08/25/2016] [Indexed: 10/21/2022]
|
21
|
Shao M, Li L, Song S, Wu W, Peng P, Yang C, Zhang M, Duan F, Jia D, Zhang J, Wu H, Zhao R, Wang L, Ruan Y, Gu J. E3 ubiquitin ligase CHIP interacts with C-type lectin-like receptor CLEC-2 and promotes its ubiquitin-proteasome degradation. Cell Signal 2016; 28:1530-6. [PMID: 27443248 DOI: 10.1016/j.cellsig.2016.07.007] [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] [Received: 04/14/2016] [Revised: 06/30/2016] [Accepted: 07/17/2016] [Indexed: 01/14/2023]
Abstract
C-type lectin-like receptor 2 (CLEC-2) was originally identified as a member of non-classical C-type lectin-like receptors in platelets and immune cells. Activation of CLEC-2 is involved in thrombus formation, lymphatic/blood vessel separation, platelet-mediated tumor metastasis and immune response. Nevertheless, the regulation of CLEC-2 expression is little understood. In this study, we identified that the C terminus of Hsc70-interacting protein (CHIP) interacted with CLEC-2 by mass spectrometry analysis, and CHIP decreased the protein expression of CLEC-2 through lysine-48-linked ubiquitination and proteasomal degradation. Deleted and point mutation also revealed that CHIP controlled CLEC-2 protein expression via both tetratricopeptide repeats (TPR) domain and Ubox domain in a HSP70/90-independent manner. Moreover, reduced CHIP expression was associated with decreased CLEC-2 polyubiquitination and increased CLEC-2 protein levels in PMA-induced differentiation of THP-1 monocytes into macrophages. These results indicate that CLEC-2 is the target substrate of E3 ubiquitin ligase CHIP, and suggest that the CHIP/CLEC-2 axis may play an important role in the modulation of immune response.
Collapse
Affiliation(s)
- Miaomiao Shao
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Lili Li
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Shushu Song
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Weicheng Wu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Peike Peng
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Caiting Yang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Mingming Zhang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Fangfang Duan
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Dongwei Jia
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Jie Zhang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Hao Wu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Ran Zhao
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Lan Wang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China.
| | - Yuanyuan Ruan
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China.
| | - Jianxin Gu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
| |
Collapse
|
22
|
Kazama F, Nakamura J, Osada M, Inoue O, Oosawa M, Tamura S, Tsukiji N, Aida K, Kawaguchi A, Takizawa S, Kaneshige M, Tanaka S, Suzuki-Inoue K, Ozaki Y. Measurement of soluble C-type lectin-like receptor 2 in human plasma. Platelets 2015; 26:711-9. [PMID: 25856065 DOI: 10.3109/09537104.2015.1021319] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Detection of platelet activation in vivo is useful to identify patients at risk of thrombotic diseases. Platelet factor 4 (PF4) and β-thromboglobulin (β-TG) are used for this purpose; however, they are easily released upon the minimal platelet activation that occurs during sampling. Soluble forms of several platelet membrane proteins are released upon platelet activation; however, the soluble form of C-type lectin-like receptor 2 (sCLEC-2) has not yet been fully investigated. Western blotting with an anti-CLEC-2 antibody showed that sCLEC-2 was released from washed human platelets stimulated with collagen mimetics. To detect sCLEC-2 in plasma, we established a sandwich enzyme-linked immunosorbent assay (ELISA) using F(ab')2 anti-CLEC-2 monoclonal antibodies. Although plasma mixed with citrate, adenosine, theophylline and adenosine (CTAD) is needed for the PF4 and β-TG assays, effects of anti-coagulants (EDTA, citrate and CTAD) on the sCLEC-2 ELISA were negligible. Moreover, while special techniques are required for blood sampling and sample preparation for PF4 and β-TG assay, the standard blood collections procedures used in daily clinical laboratory tests have shown to suffice for sCLEC-2 analysis. In this study, we found that two forms of sCLEC-2 are released after platelet activation: a shed fragment and a microparticle-bound full-length protein, both of which are detected by the sCLEC-2 ELISA. The average concentration of sCLEC-2 in the plasma of 10 healthy individuals was 97 ± 55 pg/ml, whereas that in the plasma of 25 patients with diabetes mellitus (DM) was 149 ± 260 pg/ml. A trend towards an increase in sCLEC-2 concentration in the DM patients may reflect in vivo platelet activation in the patients, suggesting that sCLEC-2 may have clinical significance as a biomarker of in vivo platelet activation.
Collapse
Affiliation(s)
- Fuminori Kazama
- a Department of Clinical and Laboratory Medicine, Faculty of Medicine , University of Yamanashi , Chuo , Yamanashi , Japan
| | - Junya Nakamura
- b Department of Antibody Group, Narita R&D Department, Research and Development Division , LSI Medicine Corporation , Takomachi, Katori-gun , Chiba , Japan
| | - Makoto Osada
- a Department of Clinical and Laboratory Medicine, Faculty of Medicine , University of Yamanashi , Chuo , Yamanashi , Japan
| | - Osamu Inoue
- c Faculty of Medicine , Infection Control Office, University of Yamanashi Hospital, University of Yamanashi , Chuo , Yamanashi , Japan
| | - Mitsuru Oosawa
- b Department of Antibody Group, Narita R&D Department, Research and Development Division , LSI Medicine Corporation , Takomachi, Katori-gun , Chiba , Japan
| | - Shogo Tamura
- a Department of Clinical and Laboratory Medicine, Faculty of Medicine , University of Yamanashi , Chuo , Yamanashi , Japan .,d Japan Society for the Promotion of Science , Tokyo , Japan , and
| | - Nagaharu Tsukiji
- a Department of Clinical and Laboratory Medicine, Faculty of Medicine , University of Yamanashi , Chuo , Yamanashi , Japan
| | - Kaoru Aida
- e Department of Internal Medicine III , Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi , Chuo , Yamanashi , Japan
| | - Akio Kawaguchi
- e Department of Internal Medicine III , Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi , Chuo , Yamanashi , Japan
| | - Soichi Takizawa
- e Department of Internal Medicine III , Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi , Chuo , Yamanashi , Japan
| | - Masahiro Kaneshige
- e Department of Internal Medicine III , Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi , Chuo , Yamanashi , Japan
| | - Shoichiro Tanaka
- e Department of Internal Medicine III , Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi , Chuo , Yamanashi , Japan
| | - Katsue Suzuki-Inoue
- a Department of Clinical and Laboratory Medicine, Faculty of Medicine , University of Yamanashi , Chuo , Yamanashi , Japan
| | - Yukio Ozaki
- a Department of Clinical and Laboratory Medicine, Faculty of Medicine , University of Yamanashi , Chuo , Yamanashi , Japan
| |
Collapse
|
23
|
Wu X, Zhang J, Ge H, Gupte J, Baribault H, Lee KJ, Lemon B, Coberly S, Gong Y, Pan Z, Rulifson IC, Gardner J, Richards WG, Li Y. Soluble CLEC2 Extracellular Domain Improves Glucose and Lipid Homeostasis by Regulating Liver Kupffer Cell Polarization. EBioMedicine 2015; 2:214-24. [PMID: 26151067 PMCID: PMC4489977 DOI: 10.1016/j.ebiom.2015.02.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 02/17/2015] [Accepted: 02/22/2015] [Indexed: 01/14/2023] Open
Abstract
The polarization of tissue resident macrophages toward the alternatively activated, anti-inflammatory M2 phenotype is believed to positively impact obesity and insulin resistance. Here we show that the soluble form of the extracellular domain (ECD) of C-type lectin-like receptor 2, CLEC2, regulates Kupffer cell polarization in the liver and improves glucose and lipid parameters in diabetic animal models. Over-expression of Fc-CLEC2(ECD) in mice via in vivo gene delivery, or injection of recombinant Fc-CLEC2(ECD) protein, results in a reduction of blood glucose and liver triglyceride levels and improves glucose tolerance. Furthermore, Fc-CLEC2(ECD) treatment improves cytokine profiles and increases both the M2 macrophage population and the genes involved in the oxidation of lipid metabolism in the liver. These data reveal a previously unidentified role for CLEC2 as a regulator of macrophage polarity, and establish CLEC2 as a promising therapeutic target for treatment of diabetes and liver disease. CLEC2, a type II C-type lectin-like receptor, is expressed on a variety of cell types including Kupffer cells. Overexpression of CLEC2 ECD in mice improves glucose and lipid parameters and induces markers of alternatively activated Kupffer cells. CLEC2 is a promising therapeutic target for the treatment of diabetes and liver diseases.
Collapse
Affiliation(s)
- Xinle Wu
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Jun Zhang
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Hongfei Ge
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Jamila Gupte
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Helene Baribault
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Ki Jeong Lee
- Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA 91320, United States
| | - Bryan Lemon
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Suzanne Coberly
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Yan Gong
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Zheng Pan
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Ingrid C Rulifson
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - Jonitha Gardner
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| | - William G Richards
- Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA 91320, United States
| | - Yang Li
- Amgen Inc., 1120 Veterans Blvd., South San Francisco, CA 94080, United States
| |
Collapse
|
24
|
Abstract
The C-type lectin-like receptor CLEC-2 mediates platelet activation through a hem-immunoreceptor tyrosine-based activation motif (hemITAM). CLEC-2 initiates a Src- and Syk-dependent signaling cascade that is closely related to that of the 2 platelet ITAM receptors: glycoprotein (GP)VI and FcγRIIa. Activation of either of the ITAM receptors induces shedding of GPVI and proteolysis of the ITAM domain in FcγRIIa. In the present study, we generated monoclonal antibodies against human CLEC-2 and used these to measure CLEC-2 expression on resting and stimulated platelets and on other hematopoietic cells. We show that CLEC-2 is restricted to platelets with an average copy number of ∼2000 per cell and that activation of CLEC-2 induces proteolytic cleavage of GPVI and FcγRIIa but not of itself. We further show that CLEC-2 and GPVI are expressed on CD41+ microparticles in megakaryocyte cultures and in platelet-rich plasma, which are predominantly derived from megakaryocytes in healthy donors, whereas microparticles derived from activated platelets only express CLEC-2. Patients with rheumatoid arthritis, an inflammatory disease associated with increased microparticle production, had raised plasma levels of microparticles that expressed CLEC-2 but not GPVI. Thus, CLEC-2, unlike platelet ITAM receptors, is not regulated by proteolysis and can be used to monitor platelet-derived microparticles.
Collapse
|
25
|
Chang CH, Chung CH, Hsu CC, Peng HC, Huang TF. Inhibitory effects of polypeptides derived from a snake venom C-type lectin, aggretin, on tumor cell-induced platelet aggregation. J Thromb Haemost 2014; 12:540-9. [PMID: 24479713 DOI: 10.1111/jth.12519] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND OBJECTIVES Podoplanin, a transmembrane sialoglycoprotein, is expressed by lymphatic endothelial cells and many tumor cells, and is involved in tumor cell-induced platelet aggregation and tumor metastasis. A recent study found that C-type lectin-like receptor 2 (CLEC-2) is a physiologic receptor for podoplanin. Previous studies showed that aggretin, a snake venom-derived protein, activates platelets by targeting platelet CLEC-2. We hypothesized that the C-terminal fragment of aggretin may bind to platelet CLEC-2 and displace podoplanin, in turn exerting antitumor metastatic effects. METHODS AND RESULTS Aggretin α-chain C-terminus (residues 106-136; AACT) prolonged the lag phase of platelet aggregation induced by aggretin in human washed platelets, indicating that AACT may target the binding site of CLEC-2. HepG2 cells, which are podoplanin-expressing hepatoma cells, induced platelet aggregation with a lag phase. Pretreatment with AACT inhibited platelet aggregation and prolonged the lag phase induced by HepG2 cells. This inhibitory effect was also found with another hepatocarcinoma cell line, HuH-7. AACT inhibited the interaction between HuH-7 cells and platelets, and a specific binding assay demonstrated that CLEC-2 was the binding site for AACT on platelets. In addition, the invasive ability of HepG2 cells was abolished by AACT in a chick embryo chorioallantoic membrane model. Furthermore, formation of lung metastases after intravenous administration of HuH-7 cells was significantly reduced when mice were treated with AACT. CONCLUSIONS AACT interacts with CLEC-2 of platelets, leading to interference with platelet aggregation and the subsequent metastatic potential of tumor cells. These results suggest that aggretin AACT is a potential candidate for the treatment of tumor metastasis through CLEC-2 blockade.
Collapse
Affiliation(s)
- C-H Chang
- Graduate Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | | | | | | | | |
Collapse
|
26
|
Characterization of inflamin, the first member of a new family of snake venom proteins that induces inflammation. Biochem J 2013; 455:239-50. [PMID: 23829475 DOI: 10.1042/bj20130599] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Unlike other sea snakes, Aipysurus eydouxii feeds exclusively on fish eggs. This unusual feeding habit prompted us to search for unique transcripts in their venom glands. In the present study we expressed a novel cysteine-rich secretory protein containing 94 amino acid residues that was identified in its cDNA library. As it induced inflammation and writhing in animals, this protein was named inflamin. It induced two waves of prostanoid production. The first wave peaked at 10 min and 6-oxo PGF1α (prostaglandin F1α) (6-keto PGF1α) was the major product. The second wave, specifically of 6-oxo PGF1α and PGE2 (prostanglandin E2), started after 2 h. In RAW 264.7 cells, COX-1 (cyclo-oxygenase-1) activity showed a transient increase at 10 min and is responsible for the first wave, but its expression was unaffected. COX-2 was induced after 3 h and is responsible for the second wave. Using specific inhibitors, we showed that cPLA2 (calcium-dependent phospholipase A2), and not sPLA2 (secretory phospholipase A2), iPLA2 (calcium-independent phospholipase A2) or DAG (diacylglycerol) lipase, plays a key role in arachidonate release. The cPLA2 activity showed a transient increase of 62% at 10 min; this increase was due to its phosphorylation and not due to an increase in its expression. Thus inflamin, the first member of a new family of snake venom proteins, leads to an increase in the cPLA2 and COX-1 activity resulting in inflammation and pain.
Collapse
|
27
|
The snake venom rhodocytin from Calloselasma rhodostoma- a clinically important toxin and a useful experimental tool for studies of C-type lectin-like receptor 2 (CLEC-2). Toxins (Basel) 2013; 5:665-74. [PMID: 23594438 PMCID: PMC3705285 DOI: 10.3390/toxins5040665] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 04/01/2013] [Accepted: 04/07/2013] [Indexed: 12/21/2022] Open
Abstract
The snake venom, rhodocytin, from the Malayan viper, Calloselasma rhodostoma, and the endogenous podoplanin are identified as ligands for the C-type lectin-like receptor 2 (CLEC-2). The snakebites caused by Calloselasma rhodostoma cause a local reaction with swelling, bleeding and eventually necrosis, together with a systemic effect on blood coagulation with distant bleedings that can occur in many different organs. This clinical picture suggests that toxins in the venom have effects on endothelial cells and vessel permeability, extravasation and, possibly, activation of immunocompetent cells, as well as effects on platelets and the coagulation cascade. Based on the available biological studies, it seems likely that ligation of CLEC-2 contributes to local extravasation, inflammation and, possibly, local necrosis, due to microthrombi and ischemia, whereas other toxins may be more important for the distant hemorrhagic complications. However, the venom contains several toxins and both local, as well as distant, symptoms are probably complex reactions that cannot be explained by the effects of rhodocytin and CLEC-2 alone. The in vivo reactions to rhodocytin are thus examples of toxin-induced crosstalk between coagulation (platelets), endothelium and inflammation (immunocompetent cells). Very few studies have addressed this crosstalk as a part of the pathogenesis behind local and systemic reactions to Calloselasma rhodostoma bites. The author suggests that detailed biological studies based on an up-to-date methodology of local and systemic reactions to Calloselasma rhodostoma bites should be used as a hypothesis-generating basis for future functional studies of the CLEC-2 receptor. It will not be possible to study the effects of purified toxins in humans, but the development of animal models (e.g., cutaneous injections of rhodocytin to mimic snakebites) would supplement studies in humans.
Collapse
|
28
|
C-type lectin-like proteins from snake venoms. Toxicon 2012; 60:512-9. [DOI: 10.1016/j.toxicon.2012.03.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 02/28/2012] [Accepted: 03/01/2012] [Indexed: 11/21/2022]
|
29
|
Osada M, Inoue O, Ding G, Shirai T, Ichise H, Hirayama K, Takano K, Yatomi Y, Hirashima M, Fujii H, Suzuki-Inoue K, Ozaki Y. Platelet activation receptor CLEC-2 regulates blood/lymphatic vessel separation by inhibiting proliferation, migration, and tube formation of lymphatic endothelial cells. J Biol Chem 2012; 287:22241-52. [PMID: 22556408 DOI: 10.1074/jbc.m111.329987] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The platelet activation receptor CLEC-2 plays crucial roles in thrombosis/hemostasis, tumor metastasis, and lymphangiogenesis, although its role in thrombosis/hemostasis remains controversial. An endogenous ligand for CLEC-2, podoplanin, is expressed in lymphatic endothelial cells (LECs). We and others have reported that CLEC-2-deficiency is lethal at mouse embryonic/neonatal stages associated with blood-filled lymphatics, indicating that CLEC-2 is essential for blood/lymphatic vessel separation. However, its mechanism, and whether CLEC-2 in platelets is necessary for this separation, remains unknown. We found that specific deletion of CLEC-2 from platelets leads to the misconnection of blood/lymphatic vessels. CLEC-2(+/+) platelets, but not by CLEC-2(-/-) platelets, inhibited LEC migration, proliferation, and tube formation but had no effect on human umbilical vein endothelial cells. Additionally, supernatants from activated platelets significantly inhibited these three functions in LECs, suggesting that released granule contents regulate blood/lymphatic vessel separation. Bone morphologic protein-9 (BMP-9), which we found to be present in platelets and released upon activation, appears to play a key role in regulating LEC functions. Only BMP-9 inhibited tube formation, although other releasates including transforming growth factor-β and platelet factor 4 inhibited proliferation and/or migration. We propose that platelets regulate blood/lymphatic vessel separation by inhibiting the proliferation, migration, and tube formation of LECs, mainly because of the release of BMP-9 upon activation by CLEC-2/podoplanin interaction.
Collapse
Affiliation(s)
- Makoto Osada
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi 409-3898, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Suzuki-Inoue K, Inoue O, Ozaki Y. Novel platelet activation receptor CLEC-2: from discovery to prospects. J Thromb Haemost 2011; 9 Suppl 1:44-55. [PMID: 21781241 DOI: 10.1111/j.1538-7836.2011.04335.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
C-type lectin-like receptor 2 (CLEC-2) has been identified as a receptor for the platelet activating snake venom rhodocytin. CLEC-2 elicits powerful platelet activation signals in conjunction with Src, Syk kinases, and phospholipase Cγ2, similar to the collagen receptor glycoprotein (GP) VI/FcRγ-chain complex. In contrast to GPVI/FcRγ, which initiates platelet activation through the tandem YxxL motif immunoreceptor tyrosine-based activation motif (ITAM), CLEC-2 signals via the single YxxL motif hemi-ITAM. The endogenous ligand of CLEC-2 has been identified as podoplanin, which is expressed on the surface of tumour cells and facilitates tumour metastasis by inducing platelet activation. Studies of CLEC-2-deficient mice have revealed several physiological roles of CLEC-2. Podoplanin is also expressed in lymphatic endothelial cells as well as several other cells, including type I alveolar cells and kidney podocytes, but is absent from vascular endothelial cells. In the developmental stages, when the primary lymph sac is derived from the cardinal vein, podoplanin activates platelets in lymphatic endothelial cells by binding to CLEC-2, which facilitates blood/lymphatic vessel separation. Moreover, CLEC-2 is involved in thrombus stabilisation under flow conditions in part through homophilic interactions. However, the absence of CLEC-2 does not significantly increase bleeding tendency. CLEC-2 may be a good target protein for novel anti-platelet drugs or anti-metastatic drugs having therapeutic and preventive effects on arterial thrombosis and cancer, the primary causes of mortality in developed countries. In this article, we review the mechanisms of signal transduction, structure, expression, and function of CLEC-2.
Collapse
Affiliation(s)
- K Suzuki-Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| | | | | |
Collapse
|
31
|
|
32
|
Suzuki-Inoue K. Essential in vivo roles of the platelet activation receptor CLEC-2 in tumour metastasis, lymphangiogenesis and thrombus formation. J Biochem 2011; 150:127-32. [PMID: 21693546 DOI: 10.1093/jb/mvr079] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have recently identified C-type lectin-like receptor 2 (CLEC-2) as a receptor for the platelet activating snake venom rhodocytin. CLEC-2 elicits powerful platelet activation signals in conjunction with single YxxL motif in its cytoplasmic tail, Src, Syk kinases, and phospholipase Cγ2. An endogenous ligand of CLEC-2 has been identified as podoplanin, which is a membrane protein of tumour cells and facilitates tumour metastasis by inducing platelet activation. Studies of CLEC-2-deficient mice have revealed several physiological roles of CLEC-2. Podoplanin is also expressed in lymphatic endothelial cells. In the developmental stages, when the primary lymph sac is derived from the cardinal vein, podoplanin activates platelets in lymphatic endothelial cells, which facilitates blood/lymphatic vessel separation. Moreover, CLEC-2 is involved in thrombus stabilization under flow conditions in part through homophilic interactions. The absence of CLEC-2 does not significantly increase bleeding tendency, implying that CLEC-2 may be a good target protein for anti-platelet drugs in addition to anti-metastatic drugs.
Collapse
Affiliation(s)
- Katsue Suzuki-Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi 409-3898, Japan.
| |
Collapse
|