1
|
Zhang X, Li D, Wang W, Zheng X, Zhang C, Jin Y, Meng S, Li J, Dai R, Kang W, Wu H, Zheng Z, Zhang R. A novel NIR-II FL/ PA imaging-guided synergistic photothermal-immune therapy: Biomineralizing nanosystems integrated with anti-tumor and bone repair. Mater Today Bio 2024; 26:101052. [PMID: 38628351 PMCID: PMC11019278 DOI: 10.1016/j.mtbio.2024.101052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/01/2024] [Accepted: 04/09/2024] [Indexed: 04/19/2024] Open
Abstract
Advanced stages of breast cancer are frequently complicated by bone metastases, which cause significant cancer-related bone destruction and mortality. However, the early precise theranostics of bone metastasis remains a formidable challenge in clinical practice. Herein,a novel all-in-one nanotheranostic system (ABI NYs) combining NIR-II FL/PA dual-modal imaging with photothermal-immunity therapeutic functionalities in one component was designed to precisely localize bone metastasis microscopic lesions and achieve complete tumor ablation at an early stage. The surface modification of the nanosystem with ibandronate (IBN) facilitates both passive and active targeting, significantly improving the detection rate of bone metastasis and suppressing the bone resorption. Superior photothermal performance produces sufficient heat to kill tumor cells while stimulating the upregulation of heat shock proteins 70 (HSP70), which triggers the immunogenic cell death (ICD) effect and the anti-tumor immune response. These all-in-one nanosystems precisely demonstrated early lesion localization in bone metastases and total tumor ablation with a single integration via "one-component, multi-functions" technique. To sum up, ABI NYs, as novel biomineralizing nanosystems integrated with anti-tumor and bone repair, present a synergistic therapy strategy, providing insight into the theranostics of bone metastases and clinical research.
Collapse
Affiliation(s)
- Xin Zhang
- Department of Orthopedics, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Dongsheng Li
- Research Team of Molecular Medicine, First Hospital of Shanxi Medical University, Shanxi Medical University, Taiyuan, 030001, China
| | - Wenxuan Wang
- Department of Orthopedics, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Xiaochun Zheng
- Department of Radiology, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital), Taiyuan, 030000, China
| | - Chongqing Zhang
- Medical Imaging Department, Shanxi Province Cancer Hospital (Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences/Cancer Hospital Affiliated to Shanxi Medical University), Taiyuan, 030001, China
| | - Yarong Jin
- Department of Radiology, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital), Taiyuan, 030000, China
| | - Shichao Meng
- Department of Orthopedics, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Jinxuan Li
- Department of Orthopedics, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Rong Dai
- Department of Radiology, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital), Taiyuan, 030000, China
| | - Weiwei Kang
- Department of Radiology, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital), Taiyuan, 030000, China
| | - Hua Wu
- Department of Orthopedics, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Ziliang Zheng
- Department of Orthopedics, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Ruiping Zhang
- Department of Radiology, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital), Taiyuan, 030000, China
| |
Collapse
|
2
|
Taghikhani A, Hassan ZM, Ebrahimi M, Moazzeni SM. microRNA modified tumor-derived exosomes as novel tools for maturation of dendritic cells. J Cell Physiol 2018; 234:9417-9427. [PMID: 30362582 DOI: 10.1002/jcp.27626] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 09/25/2018] [Indexed: 12/21/2022]
Abstract
Tumor-derived exosomes (TEX) are known by their immune suppression effects as well as initiation mediators in cancer progression and metastasis. Meanwhile, they are appropriate sources to induce immunity against tumor cells, as consist of tumor specific and associated antigens. The aim of the current study is modifying TEX with microRNA miR-155, miR-142, and let-7i, to enhance their immune stimulation ability and induce potent dendritic cells (DC). For this, exosomes were isolated from mouse mammalian breast cancer cell line; 4T1, and subjected to miR-155, miR-142, and let-7i by electroporation. Immature DCs were generated from mouse bone marrow in the presence of interleukin-4 (IL-4) and granulocyte-macrophage colony-stimulating factor (GM-CSF). To mature DCs, lipopolysaccharide (LPS), TEX, and modified TEX were used. The expression level of miRNAs and their target genes (IL-6, IL-17, IL-1b, TGFβ, SOCS1, KLRK1, IFNγ, and TLR4) was determined. TEX were nanovesicles with spheroid morphology which expressed CD81, CD63, and TSG101, as exosome markers, at protein level. MHCII, CD80, and CD40 as maturation markers were assessed by flow cytometry. Overexpression of miRNAs were confirmed in exosomes and mDCs. Up and downregulation of target genes confirmed the gene network in DC maturation. We found that Let-7i could efficiently induce the DC maturation, as well as miR-142 and miR-155 have enhancing effects. These findings reveal that the modified TEX would be a hopeful cell-free vaccine for the cancer treatment.
Collapse
Affiliation(s)
- Adeleh Taghikhani
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.,Department of Stem Cells and Developmental Biology, Cell Sciences Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Zuhair Mohammad Hassan
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Marzieh Ebrahimi
- Department of Stem Cells and Developmental Biology, Cell Sciences Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | | |
Collapse
|
3
|
Abdolmohammadi K, Mahmoudi T, Jafari-Koshki T, Hassan ZM, Pourfathollah AA. Immunomodulatory Effects of Blood Transfusion on Tumor Size, Metastasis, and Survival in Experimental Fibrosarcoma. Indian J Hematol Blood Transfus 2018; 34:697-702. [PMID: 30369743 DOI: 10.1007/s12288-018-0962-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/25/2018] [Indexed: 12/13/2022] Open
Abstract
In spite of efforts, blood transfusion is still accompanied with adverse effects such as transfusion-related immunomodulation (TRIM). The current study aimed to evaluate the effects of allogeneic, syngeneic, fresh and storage blood transfusion on the growth and metastasis of tumors and survival in fibrosarcoma bearing BALB/c mice. Twenty-five BALB/c mice were grouped into five groups of equal size. All groups were injected 1.2 × 106 WEHI-164 cells subcutaneously to induce fibrosarcoma tumor. After expansion of the tumor, in four groups (except for the control group), hemorrhage-induced anemia was developed. Twenty-four hours later, blood deficit was replaced by fresh allogeneic, storage allogeneic, fresh syngeneic and storage syngeneic blood transfusion, respectively. After a blood transfusion, for 13 days, the tumor size and survival of the mice were evaluated. In the day 20, the mice were sacrificed and their spleen tissues were evaluated for TRIM induced metastasis. Tumor size increase in the groups that received allogeneic (fresh and storage) and storage syngeneic blood transfusion was significantly higher than the control group (P value < 0.05). However, no significant difference was present in survival between the experiment groups and the control group. There was no metastasis in none of groups at the end of the study. Allogeneic and storage blood transfusion could have immunomodulatory effects such as increased tumor size. However, it seems that fresh and syngeneic blood transfusion have no effects on tumor growth in fibrosarcoma bearing mice. Further evidence may prove that more attention is warranted in blood transfusion into cancer cases.
Collapse
Affiliation(s)
- Kamal Abdolmohammadi
- 1Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,2Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Tayebeh Mahmoudi
- 3Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Tohid Jafari-Koshki
- 4Medical Education Research Center, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran.,5Road Traffic Injury Research Center, Department of Statistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zuhair Mohammad Hassan
- 2Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ali Akbar Pourfathollah
- 2Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| |
Collapse
|
4
|
Behzadi E, Hosseini HM, Halabian R, Fooladi AAI. Macrophage cell-derived exosomes/staphylococcal enterotoxin B against fibrosarcoma tumor. Microb Pathog 2017; 111:132-138. [DOI: 10.1016/j.micpath.2017.08.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 08/12/2017] [Accepted: 08/16/2017] [Indexed: 01/08/2023]
|
5
|
Aghebati Maleki R, Shanehbandi D, Sadigh Eteghad S, Zarredar H, Zare Shahneh F, Aghebati Maleki L, Samavati M, Asadi H, Mosavi SE, Habibzadeh A, Mohammadian M, Baradaran B. Effects of some natural immunomodulatory compounds in combination with thalidomide on survival rate and tumor size in fibrosarcoma-bearing mice. Adv Pharm Bull 2014; 4:465-70. [PMID: 25364664 DOI: 10.5681/apb.2014.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 06/14/2014] [Accepted: 06/18/2014] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Despite significant advances have been achieved in cancer therapy, response to conventional treatments like surgery, radiotherapy and chemotherapy varies among individuals. Immunotherapy is known to be an effective strategy for patients who are resistant to the currently available interventions. METHODS Ninety-six male Balb/c mice (aged 6-8 weeks) were selected and divided into twelve groups of eight. Approximately, 1×10(6)of WEHI-164 cells were injected to each mouse for tumor genesis. Five immunotherapy treatments were considered in this study, including Heat Shock Proteins (HSP), Bacillus Calmette-Guérin (BCG), Bifidobacterium, Immuno-Modulator Drug (IMOD) and Thalidomide. After tumor formation, the groups were treated with one or more of these therapies. Tumor size and survival rate was regularly monitored. RESULTS Depending on the treatment group, tumor sizes were different. In some groups, combined treatments demonstrated more inhibitory effects on tumor growth rate. The mice in group (IMOD+ Thalidomide) had the lowest survival rate but group (BCG+ HSP+ Thalidomide) survived until the end of the experiment. CONCLUSION The (HSP+ BCG+ Thalidomide) group exhibited satisfactory outcomes and two third of the mice in this group went into complete remission. Some combination therapies in test groups had significant impacts on survival and tumor growth rate.
Collapse
Affiliation(s)
- Reza Aghebati Maleki
- Hematology and Oncology Research Center, Tabriz University of Medical sciences, Tabriz, Iran
| | - Dariush Shanehbandi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeed Sadigh Eteghad
- Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Habib Zarredar
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | | | - Mehrnosh Samavati
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Asadi
- Hematology and Oncology Research Center, Tabriz University of Medical sciences, Tabriz, Iran
| | - Seyed Ehsan Mosavi
- Hematology and Oncology Research Center, Tabriz University of Medical sciences, Tabriz, Iran
| | - Afshin Habibzadeh
- Hematology and Oncology Research Center, Tabriz University of Medical sciences, Tabriz, Iran
| | - Mozhdeh Mohammadian
- Amol Faculty of Paramedical Sciences, Mazandaran University of Medical Sciences, Sari, Iran
| | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| |
Collapse
|
6
|
Kim HS, Kang D, Moon MH, Kim HJ. Identification of pancreatic cancer-associated tumor antigen from HSP-enriched tumor lysate-pulsed human dendritic cells. Yonsei Med J 2014; 55:1014-27. [PMID: 24954332 PMCID: PMC4075362 DOI: 10.3349/ymj.2014.55.4.1014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 10/23/2013] [Accepted: 11/04/2013] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Vaccine strategies utilizing dendritic cells (DCs) to elicit anti-tumor immunity are the subject of intense research. Although we have shown that DCs pulsed with heat-treated tumor lysate (HTL) induced more potent anti-tumor immunity than DCs pulsed with conventional tumor lysate (TL), the underlying molecular mechanism is unclear. In order to explore the molecular basis of this approach and to identify potential antigenic peptides from pancreatic cancer, we analyzed and compared the major histocompatibility complex (MHC) ligands derived from TL- and HTL-pulsed dendritic cells by mass spectrophotometry. MATERIALS AND METHODS Human monocyte-derived dendritic cells were pulsed with TL or HTL prior to maturation induction. To delineate differences of MHC-bound peptide repertoire eluted from DCs pulsed with TL or HTL, nanoflow liquid chromatography-electrospray ionization-tandem mass spectrometry (nLC-ESI-MS-MS) was employed. RESULTS HTL, but not TL, significantly induced DC function, assessed by phenotypic maturation, allostimulation capacity and IFN-γ secretion by stimulated allogeneic T cells. DCs pulsed with TL or HTL displayed pancreas or pancreatic cancer-related peptides in context of MHC class I and II molecules. Some of the identified peptides had not been previously reported as expressed in pancreatic cancer or cancer of other tissue types. CONCLUSION Our partial lists of MHC-associated peptides revealed the differences between peptide profiles eluted from HTL-and TL-loaded DCs, implying that induced heat shock proteins in HTL chaperone tumor-derived peptides enhanced their delivery to DCs and promoted cross-presentation by DC. These findings may aid in identifying novel tumor antigens or biomarkers and in designing future vaccination strategies.
Collapse
Affiliation(s)
- Han-Soo Kim
- Innovative Cell and Gene Therapy Center, International St. Mary's Hospital, Incheon, Korea
| | - Dukjin Kang
- Center for Bioanalysis, Division of Metrology for Quality of Life, Korea Research Institute of Standards and Science, Daejeon, Korea
| | | | - Hyung Jik Kim
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
| |
Collapse
|
7
|
Smith RW, Wang J, Schültke E, Seymour CB, Bräuer-Krisch E, Laissue JA, Blattmann H, Mothersill CE. Proteomic changes in the rat brain induced by homogenous irradiation and by the bystander effect resulting from high energy synchrotron X-ray microbeams. Int J Radiat Biol 2012; 89:118-27. [DOI: 10.3109/09553002.2013.732252] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
8
|
Randazzo M, Terness P, Opelz G, Kleist C. Active-specific immunotherapy of human cancers with the heat shock protein Gp96-revisited. Int J Cancer 2012; 130:2219-31. [PMID: 22052568 DOI: 10.1002/ijc.27332] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 10/05/2011] [Indexed: 12/20/2022]
Abstract
The passive administration of specific antibodies that selectively target tumors is a well-known strategy in cancer treatment. Active immunotherapy using peptide vaccines, in contrast, is expected to induce specific, cytolytic T cells in the patient, which react against tumor antigens and destroy malignant cells. Although several concepts exist, the identification and low immunogenicity of tumor-specific peptides remain a serious problem. Heat shock proteins (HSPs), notably glycoprotein (Gp) 96, are of special interest, because they are able to take molecular peptide-fingerprints of the protein array characteristic for a particular cell. Association of Gp96 with peptides has been shown to be essential for crosspresentation and activation of T cells. Consequently, Gp96-peptide complexes extracted from cancer cells harbor the tumor-specific peptides and are immunogenic, thus offering a tool for active immunization against the tumor. Already, several immunotherapy studies of human cancers have been carried out, showing no severe adverse effects but unfortunately only limited improvement in the clinical outcome. Vitespen, a commercial HSP-peptide complex vaccine based on tumor-derived Gp96, seems to induce an improved overall survival for subsets of early stage melanoma and kidney cancer patients. The limited access to vaccine material derived from the autologous tumor requires the development of alternative protocols. Moreover, counteracting immunosuppressive mechanisms induced by the malignancy might further improve the efficacy of vaccinations. This review critically analyzes the current state of clinical immunotherapy with Gp96, with special attention to Vitespen.
Collapse
Affiliation(s)
- Marco Randazzo
- Department of Transplantation Immunology, University of Heidelberg, Heidelberg, Germany
| | | | | | | |
Collapse
|
9
|
Babaei E, Sadeghizadeh M, Hassan ZM, Feizi MAH, Najafi F, Hashemi SM. Dendrosomal curcumin significantly suppresses cancer cell proliferation in vitro and in vivo. Int Immunopharmacol 2011; 12:226-34. [PMID: 22155627 DOI: 10.1016/j.intimp.2011.11.015] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 11/19/2011] [Accepted: 11/23/2011] [Indexed: 10/14/2022]
Abstract
Curcumin, the main compound of spice turmeric, is one of the natural products that has been shown to possess effective anti-cancer properties. However, the absorption efficacy of curcumin is too low to make dramatic results in therapy. Therefore, we based the main aim of this study on improving the bioavailability of curcumin taking advantage of dendrosome nanoparticles; and subsequently evaluating in vitro and in vivo anti-tumor properties of dendrosomal curcumin. In vitro studies were carried out utilizing A431 and WEHI-164 cell lines and mouse embryonic normal fibroblasts. Our data revealed that dendrosomal curcumin not only exhibits a much higher bioavailability than void curcumin (P<0.05) but also inhibits the proliferation of cancer cells (P<0.01) in a time- and dose-dependent manner that could be ascribed to the induction of apoptosis. However, dendrosome did not indicate any toxic effect on different types of cell lines. For in vivo studies, BALB/c tumor-bearing mice were treated with dendrosomal curcumin, void curcumin, dendrosome and PBS. The results indicated that dendrosomal curcumin reduces significantly the tumor size in comparison with void curcumin and control samples (P<0.05). Furthermore, in animals treated with dendrosomal curcumin a longer survival was observed (P<0.01). We also found that the mice treated with dendrosomal curcumin, showed a significant increase in splenocyte proliferation and IFN-γ production as well as a significant decrease in IL-4 production. This can be a proof of anti-tumor immunity caused by dendrosomal curcumin. The findings demonstrate that dendrosomal curcumin offers a great potential to be a promising anti-cancer therapeutic agent.
Collapse
Affiliation(s)
- Esmaeil Babaei
- Department of Genetics, School of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | | | | | | | | | | |
Collapse
|
10
|
Wang JJ, Luo C, Li YH, Li GC. Modulatory effects of tumor-derived heat shock protein in DNA vaccination against nasopharyngeal carcinoma. Int Immunopharmacol 2011; 11:462-7. [PMID: 21220058 DOI: 10.1016/j.intimp.2010.12.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 12/22/2010] [Accepted: 12/22/2010] [Indexed: 11/24/2022]
Abstract
Use of anti-idiotype antibody vaccines is a promising strategy against tumor, however, their immunogenicity still need to be improved. Heat shock proteins (HSPs) have been shown to act as adjuvants when coadministered with peptides or given as fusion proteins and enhance the vaccination efficiency. To evaluate the enhancement of the potency of anti-idiotype antibody immunogenicity by heat shock protein gp96, C57BL/6 mice were immunized with three intramuscular inoculations of the G22 DNA and/or gp96 DNA vaccine. Control was inoculated with empty plasmid pcDNA3.1. The levels of G22-specific antibody and lymphocyte phenotype were measured by ELISA, fluorescence activated cell sorter (FACS) analysis, respectively. In the tumor protection experiment, the immunized mice were then challenged with CMT-93-G22 cells. The tumor size and the survival time of the animals were compared among these groups. The results showed that the efficacy of G22 DNA vaccine could be enhanced by coadministrating with gp96 DNA which might be relevant with activating CD8(+)T cells. Furthermore, co-injection of G22 DNA with gp96 DNA could prolong the survival time and lessen the tumor size of the CMT-93-G22-bearing mice. Our study demonstrates for the first time that G22+gp96 DNA vaccine can induce comparable G22-specific CD8(+)T cell response and is a promising candidate DNA vaccine for nasopharyngeal carcinoma.
Collapse
Affiliation(s)
- Jia-Jia Wang
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha 410078, Hunan, China
| | | | | | | |
Collapse
|
11
|
Pakravan N, Soudi S, Hassan ZM. N-terminally fusion of Her2/neu to HSP70 decreases efficiency of Her2/neu DNA vaccine. Cell Stress Chaperones 2010; 15:631-8. [PMID: 20224916 PMCID: PMC3006617 DOI: 10.1007/s12192-010-0175-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 01/27/2010] [Accepted: 01/29/2010] [Indexed: 01/23/2023] Open
Abstract
DNA vaccines consisted of tumor-associated antigen (TAA) are well suited for immunotherapy against tumor. The construct can contain TAA fused to an appropriate molecule (biologic adjuvant) to improve the efficacy of anti-tumor immune response. Heat shock protein 70 (HSP70) has been shown to be an excellent candidate, capable of cross-priming TAA by antigen presenting cells leading to a robust T-cell response. However, the relationship between strong T-cell responses and tumor rejection is not always mutually exclusive, for which TAA loss or activation of suppressive mechanisms may occur. HSP70 fused to downstream of Her2/neu as DNA vaccine has been shown to be efficient against Her2-expressing tumors. In this study, we examined if N-terminally fusion of Her2/neu to HSP70 could also improve efficiency of Her2/neu DNA vaccine. Therefore, mice with an established Her2/neu expressing tumor were immunized with DNA vaccine consisting of extracellular and trans-membrane domain (EC+TM) of rat Her2/neu alone or N-terminally fused to HSP70 and immune response was evaluated. Administration of rat Her2/neu led to partial control of tumor progression. Surprisingly, fusion of HSP70 to N-terminal of rat Her2/neu led to tumor progression. Our result proposes that fusion direction of biologic adjuvant is an important consideration when Her2/neu is used.
Collapse
Affiliation(s)
- Nafiseh Pakravan
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Ale-Ahmad Avenue, P.O. Box 14115-331, Tehran, Iran.
| | | | | |
Collapse
|
12
|
Abstract
Bone and soft tissue sarcomas are an infrequent and heterogeneous group of mesenchymal tumors including more than a hundred different entities attending to histologic patterns. Research into the molecular aspects of sarcomas has increased greatly in the last few years. This enormous amount of knowledge has allowed, for instance, to refine the classification of sarcomas, improve the diagnosis, and increase the number of therapeutical targets available, most of them under preclinical evaluation. However, other important key issues, such as sarcomagenesis and the cell of origin of sarcomas, remain unresolved. From a molecular point of view, these neoplasias are grouped into 2 main types: (a) sarcomas showing relatively simple karyotypes and translocations, which originate gene fusions (eg, EWS-FLI1 in Ewing sarcoma) or point mutations (eg, c-kit in the gastrointestinal tumors) and (b) sarcomas showing unspecific gene alterations, very complex karyotypes, and no translocations. The discovery of the early mechanisms involved in the genesis of sarcomas, the more relevant signaling pathways, and the development of genetically engineered mouse models could also provide a new individualized therapeutic strategy against these tumors. This review describes the clinical application of some of the molecular alterations found in sarcomas, some advances in the field of sarcomagenesis, and the development of animal models.
Collapse
|