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Meng Z, Wang H, Fang X, Liu Z, Yang Z, Yong J, Yang Q, Bai Y, Ren H, Xu H, Li X. Surface Decoration via Physical Interaction of Cupric Diethyldithiocarbamate Nanocrystals and Its Impact on Biodistribution and Tumor Targeting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:36894-36908. [PMID: 34328715 DOI: 10.1021/acsami.1c09346] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The vascular wall is the first physiologic barrier that circulating nanoparticles (NPs) encounter, which also is a key biological barrier to cancer drug delivery. NPs can continually scavenge the endothelium for biomarkers of cancer, and the chance of NPs' extravasation into the tumors can be enhanced. Here, we envision P-selectin as a target for specific delivery of drug nanocrystals to tumors. The cupric diethyldithiocarbamate nanocrystals (CuET NCs) were first prepared by an antisolvent method, and then nanocrystals were coated with fucoidan via physical interaction. The fucoidan-coated CuET nanocrystals (CuET@Fuc) possess high drug loading and have the ability to interact with human umbilical vein endothelial cells expressing P-selectin, which transiently enhances the endothelial permeability and facilitates CuET@Fuc extravasation from the peritumoral vascular to achieve higher tumor accumulation of drugs than bare CuET NCs. The CuET NC shows poorer anticancer efficacy than CuET@Fuc at the same dose of CuET. Upon repeated dosing of CuET@Fuc for 2 weeks, no mortality was observed in treated melanoma-bearing mice, while the mortality in the control group and excipient-treated groups reached 23%. The growth rate of melanoma in the CuET@Fuc-treated group was significantly lower than those in other groups. Furthermore, an acute toxicity study revealed that CuET@Fuc is a safe formulation for cancer treatment.
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Affiliation(s)
- Zhengjie Meng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Hao Wang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Xue Fang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Zhangya Liu
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Zheng Yang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Jiahui Yong
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Qingqing Yang
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Yunhao Bai
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Hao Ren
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
| | - Hao Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xueming Li
- College of Pharmacy, Nanjing Tech University, Nanjing 211816, China
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Ge C, Liang Y, Zhang Y, Su F, Chen L, Ma F, Ding K, Zhu J, Zheng X, Fu H. Plasma Proteins As Biodosimetric Markers of Low-Dose Radiation in Mice. Dose Response 2021; 19:15593258211016257. [PMID: 33994891 PMCID: PMC8113369 DOI: 10.1177/15593258211016257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/08/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022] Open
Abstract
Long-term exposures to low-dose radiation (LDR) may trigger several specific biological responses, including dysregulation of the immune and inflammatory systems. Here, we examined whether biodosimetry of LDR can be used to protect tissues from radiation or assess cancer risk. Mice were subjected to gamma-irradiation with repeated or single-dose LDR, and then the organ indices, peripheral hemogram, and blood biochemistry were analyzed. An antibody array was applied followed by enzyme-linked immunosorbent assay to evaluate the utility of multiple plasma proteins as biomarkers of repeated LDR in a murine model. LDR induced inapparent symptoms but slight variations in peripheral blood cell counts and alterations in blood biochemical indicator levels. Specific plasma proteins in the LDR groups were altered in response to a higher dose of irradiation at the same time points or a single-dose equivalent to the same total dose. Plasma levels of interleukin (IL)-5, IL-12p40, P-selectin, and serum amyloid A1 were associated with the LDR dose and thus may be useful as dosimetric predictors of LDR in mice. Estimating the levels of certain plasma proteins may yield promising biodosimetry parameters to accurately identify individuals exposed to LDR, facilitating risk assessment of long-term LDR exposure in individuals.
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Affiliation(s)
- Changhui Ge
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Anhui Medical University, Hefei, China
| | - Yanjie Liang
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Department of Radiation Oncology, the First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Yaocang Zhang
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Anhui Medical University, Hefei, China
| | - Fei Su
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Lu Chen
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Feiyue Ma
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,College of Chemistry & Environmental Science, Heibei University, Baoding, China
| | - Kexin Ding
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Jie Zhu
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Xiaofei Zheng
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,College of Chemistry & Environmental Science, Heibei University, Baoding, China
| | - Hanjiang Fu
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Anhui Medical University, Hefei, China
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Bahtiyar N, Onaran İ, Aydemir B, Baykara O, Toplan S, Agaoglu FY, Akyolcu MC. Monitoring of platelet function parameters and microRNA expression levels in patients with prostate cancer treated with volumetric modulated arc radiotherapy. Oncol Lett 2018; 16:4745-4753. [PMID: 30250541 DOI: 10.3892/ol.2018.9167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/16/2017] [Indexed: 12/24/2022] Open
Abstract
Radiotherapy (RT) may result in platelet activation and thrombosis development. To the best of our knowledge, the potential effect of volumetric-modulated arc therapy (VMAT), a novel radiotherapy technique, on platelet function and microRNA (miRNA/miR) expression has not been previously investigated. The present study aimed to determine the effect of VMAT on the alterations in platelet function parameters and miRNA expression levels. A total of 25 patients with prostate cancer and 25 healthy subjects were included in the present study. Blood samples were collected from the patient group on the day prior to RT (pre-RT), the day RT was completed (post-RT day 0), and 40 days following the end of therapy (post-RT day 40). Platelet count, mean platelet volume (MPV) value, platelet aggregation, plasma P-selectin, thrombospondin-1, platelet factor 4, plasma miR-223 and miR-126 expression levels were measured. A significant decrease in platelet count in the post-RT day 0 group was measured in comparison with the pre-RT and the post-RT day 40 groups. Pre-RT MPV values were higher than those of the post-RT day 0 and the post-RT day 40 groups. No significant differences were observed in the levels of platelet activation markers or miR-223 and miR-126 expression levels between the RT groups. Although RT may result in a reduction in platelet and MPV counts, the results of the present study indicate that platelet activation markers are not affected by VMAT. Therefore, it is possible that no platelet activation occurs during VMAT, owing to the conformal dose distributions, improved target volume coverage and the sparing of normal tissues from undesired radiation.
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Affiliation(s)
- Nurten Bahtiyar
- Department of Biophysics, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - İlhan Onaran
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - Birsen Aydemir
- Department of Biophysics, Faculty of Medicine, Sakarya University, Sakarya 54050, Turkey
| | - Onur Baykara
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - Selmin Toplan
- Department of Biophysics, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - Fulya Yaman Agaoglu
- Department of Radiation Oncology, Institute of Oncology, Istanbul University, Istanbul 34098, Turkey
| | - Mehmet Can Akyolcu
- Department of Biophysics, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
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Shainer R, Almogi-Hazan O, Berger A, Hinden L, Mueller M, Brodie C, Simillion C, Paidas M, Barnea ER, Or R. PreImplantation factor (PIF) therapy provides comprehensive protection against radiation induced pathologies. Oncotarget 2018; 7:58975-58994. [PMID: 27449294 PMCID: PMC5312289 DOI: 10.18632/oncotarget.10635] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/30/2016] [Indexed: 12/22/2022] Open
Abstract
Acute Radiation Syndrome (ARS) may lead to cancer and death and has few effective countermeasures. Efficacy of synthetic PIF treatment was demonstrated in preclinical autoimmune and transplantation models. PIF protected against inflammation and mortality following lethal irradiation in allogeneic bone marrow transplant (BMT) model. Herein, we demonstrate that PIF imparts comprehensive local and systemic protection against lethal and sub-lethal ARS in murine models. PIF treatment 2 h after lethal irradiation led to 100% survival and global hematopoietic recovery at 2 weeks after therapy. At 24 h after irradiation PIF restored hematopoiesis in a semi-allogeneic BMT model. PIF-preconditioning provided improved long-term engraftment. The direct effect of PIF on bone marrow cells was also demonstrated in vitro: PIF promoted pre-B cell differentiation and increased immunoregulatory properties of BM-derived mesenchymal stromal cells. PIF treatment also improved hematopoietic recovery and reduced systemic inflammatory cytokine production after sub-lethal radiation exposure. Here, PIF also prevented colonic crypt and basal membrane damage coupled with reduced nitric oxide synthetase (iNOS) and increased (B7h1) expression. Global upper GI gene pathway analysis revealed PIF's involvement in protein-RNA interactions, mitochondrial oxidative pathways, and responses to cellular stress. Some effects may be attributed to PIF's influence on macrophage differentiation and function. PIF demonstrated a regulatory effect on irradiated macrophages and on classically activated M1 macrophages, reducing inflammatory gene expression (iNOS, Cox2), promoting protective (Arg1) gene expression and inducing pro-tolerance cytokine secretion. Notably, synthetic PIF is stable for long-term field use. Overall, clinical investigation of PIF for comprehensive ARS protection is warranted.
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Affiliation(s)
- Reut Shainer
- Department of Bone Marrow Transplantation and Cancer Immunotherapy, Hadassah-Hebrew University Medical Center, Jerusalem, 91120, Israel
| | - Osnat Almogi-Hazan
- Department of Bone Marrow Transplantation and Cancer Immunotherapy, Hadassah-Hebrew University Medical Center, Jerusalem, 91120, Israel
| | - Arye Berger
- Department of Bone Marrow Transplantation and Cancer Immunotherapy, Hadassah-Hebrew University Medical Center, Jerusalem, 91120, Israel
| | - Liad Hinden
- Department of Bone Marrow Transplantation and Cancer Immunotherapy, Hadassah-Hebrew University Medical Center, Jerusalem, 91120, Israel
| | - Martin Mueller
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine, New Haven, CT 06510, USA.,Department of Obstetrics and Gynecology, University Hospital Bern, Bern, 3003, Switzerland
| | | | - Cedric Simillion
- Department of Clinical Research, University of Bern, Bern, 3003, Switzerland
| | - Michael Paidas
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Eytan R Barnea
- The Society for The Investigation of Early Pregnancy (SIEP), Cherry Hill, NJ 08003, USA.,BioIncept, LLC (PreImplantation Factor* Proprietary), Cherry Hill, NJ 08003, USA
| | - Reuven Or
- Department of Bone Marrow Transplantation and Cancer Immunotherapy, Hadassah-Hebrew University Medical Center, Jerusalem, 91120, Israel
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Zhu H, Wang Y, Song C, Feng Q, Wu J, Zhao S, Gui L, Zhang X, Zhao M, Peng S. Docking of THPDTPI: to explore P-selectin as a common target of anti-tumor, anti-thrombotic and anti-inflammatory agent. Oncotarget 2018; 9:268-281. [PMID: 29416612 PMCID: PMC5787463 DOI: 10.18632/oncotarget.19374] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 07/06/2017] [Indexed: 01/01/2023] Open
Abstract
The impact of soluble P-selectin on tumor growth, thrombosis and inflammation has been individually documented. Whether the down-regulation of P-selectin expression can simultaneously slow the tumor growth, inhibit the thrombosis and attenuate the inflammatory response remains unknown. In this context, (2'S,5'S)- tetrahydropyrazino[1',2':1,6]-di{2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole}-1',4'-dione (THPDTPI) was designed as an inhibitor of P-selectin. The suitable docking of THPDTPI towards the active site of P-selectin, the significant down-regulation of THPDTPI to P-selectin expression, and the direct action of THPDTPI on P-selectin suggest that P-selectin could be a target of THPDTPI. In vivo THPDTPI possesses the anti-tumor activity, the anti-thrombotic activity and the anti-inflammatory activity. This implies that targeting P-selectin is of essential importance for this triple activity. The minimal effective doses of THPDTPI inhibiting the tumor growth, the rat arterial thrombosis and the mouse ear edema are 0.01 μmol/kg, 0.1 μmol/kg and 0.001 μmol/kg, respectively. Atomic force microscopy images and FT-MS spectra showed that the adhesion of THPDTPI onto the surfaces of the platelets may be the first step of P-selectin targeting. Besides, the dependence of the triple action of THPDTPI inhibiting the tumor growth, the thrombosis and the inflammation on the decrease of the soluble P-selectin led to the correlation of the soluble P-selectin with the serum TNF-α and serum IL-8.
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Affiliation(s)
- Haimei Zhu
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Yuji Wang
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Beijing Laboratory of Biomedical Materials, Beijing, China
| | - Ce Song
- Guangxi Pusen Biotechnology Co. Ltd., Guilin, China
| | - Qiqi Feng
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Jianhui Wu
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Beijing Laboratory of Biomedical Materials, Beijing, China
| | - Shurui Zhao
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Lin Gui
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Beijing Laboratory of Biomedical Materials, Beijing, China
| | - Xiaoyi Zhang
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Beijing Laboratory of Biomedical Materials, Beijing, China
| | - Ming Zhao
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Beijing Laboratory of Biomedical Materials, Beijing, China
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shiqi Peng
- College of Pharmaceutical Sciences of Capital Medical University, Beijing, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China
- Beijing Laboratory of Biomedical Materials, Beijing, China
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Toullec A, Buard V, Rannou E, Tarlet G, Guipaud O, Robine S, Iruela-Arispe ML, François A, Milliat F. HIF-1α Deletion in the Endothelium, but Not in the Epithelium, Protects From Radiation-Induced Enteritis. Cell Mol Gastroenterol Hepatol 2017; 5:15-30. [PMID: 29276749 PMCID: PMC5738457 DOI: 10.1016/j.jcmgh.2017.08.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 08/08/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND & AIMS Radiation therapy in the pelvic area is associated with side effects that impact the quality of life of cancer survivors. Interestingly, the gastrointestinal tract is able to adapt to significant changes in oxygen availability, suggesting that mechanisms related to hypoxia sensing help preserve tissue integrity in this organ. However, hypoxia-inducible factor (HIF)-dependent responses to radiation-induced gut toxicity are unknown. Radiation-induced intestinal toxicity is a complex process involving multiple cellular compartments. Here, we investigated whether epithelial or endothelial tissue-specific HIF-1α deletion could affect acute intestinal response to radiation. METHODS Using constitutive and inducible epithelial or endothelial tissue-specific HIF-1α deletion, we evaluated the consequences of epithelial or endothelial HIF-1α deletion on radiation-induced enteritis after localized irradiation. Survival, radiation-induced tissue injury, molecular inflammatory profile, tissue hypoxia, and vascular injury were monitored. RESULTS Surprisingly, epithelium-specific HIF-1α deletion does not alter radiation-induced intestinal injury. However, irradiated VECad-Cre+/-HIF-1αFL/FL mice present with lower radiation-induced damage, showed a preserved vasculature, reduced hypoxia, and reduced proinflammatory response compared with irradiated HIF-1αFL/FL mice. CONCLUSIONS We demonstrate in vivo that HIF-1α impacts radiation-induced enteritis and that this role differs according to the targeted cell type. Our work provides a new role for HIF-1α and endothelium-dependent mechanisms driving inflammatory processes in gut mucosae. Results presented show that effects on normal tissues have to be taken into account in approaches aiming to modulate hypoxia or hypoxia-related molecular mechanisms.
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Key Words
- EndoMT, endothelial-to-mesenchymal transition
- Endothelium
- HIF, hypoxia-inducible factor
- HIF-1α
- HIF-1αFl/FL, HIF-1α floxed mice
- HIMEC, human intestinal microvascular endothelial cells
- HUVEC, human umbilical vein endothelial cells
- IL, interleukin
- PAI-1, plasminogen activator inhibitor type-1
- PCR, polymerase chain reaction
- ROSA, ROSA26R LacZ reporter mice
- Radiation
- Sham-IR, sham-irradiation
- TBI, total body irradiation
- VECad-Cre, VE-cadherin-Cre mice
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Affiliation(s)
- Aurore Toullec
- Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Valérie Buard
- Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Emilie Rannou
- Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, California
| | - Georges Tarlet
- Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Olivier Guipaud
- Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | | | - M. Luisa Iruela-Arispe
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, California
| | - Agnès François
- Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Fabien Milliat
- Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
- Correspondence Address correspondence to: Fabien Milliat, PhD, Research Laboratory of Radiobiology and Radiopathology, Institute for Radiological Protection and Nuclear Safety, 92265 Fontenay-aux-Roses, France.Research Laboratory of Radiobiology and RadiopathologyInstitute for Radiological Protection and Nuclear Safety92265 Fontenay-aux-RosesFrance
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Zhang S, Song L, Wang Y, Herwald H, Thorlacius H. Targeting CD162 protects against streptococcal M1 protein-evoked neutrophil recruitment and lung injury. Am J Physiol Lung Cell Mol Physiol 2013; 305:L756-63. [PMID: 24039252 DOI: 10.1152/ajplung.00220.2013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Streptococcus pyogenes of the M1 serotype can cause streptococcal toxic shock syndrome and acute lung damage. CD162 is an adhesion molecule that has been reported to mediate neutrophil recruitment in acute inflammatory reactions. In this study, the purpose was to investigate the role of CD162 in M1 protein-provoked lung injury. Male C57BL/6 mice were treated with monoclonal antibody directed against CD162 or a control antibody before M1 protein challenge. Edema, neutrophil infiltration, and CXC chemokines were determined in the lung, 4 h after M1 protein administration. Fluorescence intravital microscopy was used to analyze leukocyte-endothelium interactions in the pulmonary microcirculation. Inhibition of CD162 reduced M1 protein-provoked accumulation of neutrophils, edema, and CXC chemokine formation in the lung by >54%. Moreover, immunoneutralization of CD162 abolished leukocyte rolling and firm adhesion in pulmonary venules of M1 protein-treated animals. In addition, inhibition of CD162 decreased M1 protein-induced capillary trapping of leukocytes in the lung microvasculature and improved microvascular perfusion in the lungs of M1 protein-treated animals. Our findings suggest that CD162 plays an important role in M1 protein-induced lung damage by regulating leukocyte rolling in pulmonary venules. Consequently, inhibition of CD162 attenuates M1 protein-evoked leukocyte adhesion and extravasation in the lung. Thus, our results suggest that targeting the CD162 might pave the way for novel opportunities to protect against pulmonary damage in streptococcal infections.
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Affiliation(s)
- Songen Zhang
- Dept. of Clinical Sciences, Malmö, Section of Surgery, Skåne Univ. Hospital, Lund Univ., 205 02 Malmö, Sweden.
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