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Kefayat A, Sartipzadeh O, Molaabasi F, Amiri M, Gholami R, Mirzadeh M, Shokati F, Khandaei M, Ghahremani F, Poursamar SA, Sarrami-Forooshani R. Microfluidic System Consisting of a Magnetic 3D-Printed Microchannel Filter for Isolation and Enrichment of Circulating Tumor Cells Targeted by Anti-HER2/MOF@Ferrite Core-Shell Nanostructures: A Theranostic CTC Dialysis System. Anal Chem 2024; 96:4377-4384. [PMID: 38442207 DOI: 10.1021/acs.analchem.3c03567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Low number of circulating tumor cells (CTCs) in the blood samples and time-consuming properties of the current CTC isolation methods for processing a small volume of blood are the biggest obstacles to CTC usage in practice. Therefore, we aimed to design a CTC dialysis system with the ability to process cancer patients' whole blood within a reasonable time. Two strategies were employed for developing this dialysis setup, including (i) synthesizing novel in situ core-shell Cu ferrites consisting of the Cu-CuFe2O4 core and the MIL-88A shell, which are targeted by the anti-HER2 antibody for the efficient targeting and trapping of CTCs; and (ii) fabricating a microfluidic system containing a three-dimensional (3D)-printed microchannel filter composed of a polycaprolactone/Fe3O4 nanoparticle composite with pore diameter less than 200 μm on which a high-voltage magnetic field is focused to enrich and isolate the magnetic nanoparticle-targeted CTCs from a large volume of blood. The system was assessed in different aspects including capturing the efficacy of the magnetic nanoparticles, CTC enrichment and isolation from large volumes of human blood, side effects on blood cells, and the viability of CTCs after isolation for further analysis. Under the optimized conditions, the CTC dialysis system exhibited more than 80% efficacy in the isolation of CTCs from blood samples. The isolated CTCs were viable and were able to proliferate. Moreover, the CTC dialysis system was safe and did not cause side effects on normal blood cells. Taken together, the designed CTC dialysis system can process a high volume of blood for efficient dual diagnostic and therapeutic purposes.
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Affiliation(s)
- Amirhosein Kefayat
- Biomaterials and Tissue Engineering Research Group, Department of Interdisciplinary Technologies, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran 15179-64311, Iran
- Department of Oncology, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Omid Sartipzadeh
- Biomaterials and Tissue Engineering Research Group, Department of Interdisciplinary Technologies, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran 15179-64311, Iran
| | - Fatemeh Molaabasi
- Biomaterials and Tissue Engineering Research Group, Department of Interdisciplinary Technologies, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran 15179-64311, Iran
| | - Maryam Amiri
- Faculty of Chemistry, Shahid Beheshti University, G.C., Evin, Tehran 19839-63113, Iran
| | - Reza Gholami
- Biomaterials and Tissue Engineering Research Group, Department of Interdisciplinary Technologies, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran 15179-64311, Iran
| | - Motahareh Mirzadeh
- Research & Development Department, H.B. Adli Ltd., Isfahan 81746-73461, Iran
| | - Farhad Shokati
- Biomaterials and Tissue Engineering Research Group, Department of Interdisciplinary Technologies, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran 15179-64311, Iran
| | - Mansoureh Khandaei
- Biomaterials, Nanotechnology and Tissue Engineering Department, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Fatemeh Ghahremani
- School of Paramedicine, Arak University of Medical Sciences, Arak 38196-93345, Iran
| | - Seyed Ali Poursamar
- Biomaterials, Nanotechnology and Tissue Engineering Department, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Ramin Sarrami-Forooshani
- ATMP Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran 15179-64311, Iran
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Kefayat A, Mirzadeh M, Molaabasi F, Poursamar S, Ghahremani F, Rafienia M, Arbab Jolfaie N. 55P Biodegradable and biocompatible 3D-printed scaffolds loaded with chemotherapy drugs: A new horizon for treatment of colon cancer with diffuse intraperitoneal metastasis. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
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Torabi M, Yaghoobi F, Shervedani RK, Kefayat A, Ghahremani F, Harsini PR. Mn(II) & Gd(III) Deferrioxamine Complex Contrast Agents & Temozolomide Cancer Prodrug Immobilized on Folic Acid Targeted Graphene/Polyacrylic Acid Nanocarrier: MRI Efficiency, Drug Stability & Interactions with Cancer Cells. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kefayat A, Hosseini M, Ghahremani F, Jolfaie NA, Rafienia M. Biodegradable and biocompatible subcutaneous implants consisted of pH-sensitive mebendazole-loaded/folic acid-targeted chitosan nanoparticles for murine triple-negative breast cancer treatment. J Nanobiotechnology 2022; 20:169. [PMID: 35361226 PMCID: PMC8973744 DOI: 10.1186/s12951-022-01380-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 03/17/2022] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Mebendazole (MBZ) is a well-known anti-parasite drug with significant anti-cancer properties. However, MBZ exhibits low solubility, limited absorption efficacy, extensive first-pass effect, and low bioavailability. Therefore, multiple oral administration of high dose MBZ is required daily for achieving the therapeutic serum level which can cause severe side effects and patients' non-compliance. METHOD In the present study, MBZ-loaded/folic acid-targeted chitosan nanoparticles (CS-FA-MBZ) were synthesized, characterized, and used to form cylindrical subcutaneous implants for 4T1 triple-negative breast tumor (TNBC) treatment in BALB/c mice. The therapeutic efficacy of the CS-FA-MBZ implants was investigated after subcutaneous implantation in comparison with Control, MBZ (40 mg/kg, oral administration, twice a week for 2 weeks), and CS-FA implants, according to 4T1 tumors' growth progression, metastasis, and tumor-bearing mice survival time. Also, their biocompatibility was evaluated by blood biochemical analyzes and histopathological investigation of vital organs. RESULTS The CS-FA-MBZ implants were completely degraded 15 days after implantation and caused about 73.3%, 49.2%, 57.4% decrease in the mean tumors' volume in comparison with the Control (1050.5 ± 120.7 mm3), MBZ (552.4 ± 76.1 mm3), and CS-FA (658.3 ± 88.1 mm3) groups, respectively. Average liver metastatic colonies' number per microscope field at the CS-FA-MBZ group (2.3 ± 0.7) was significantly (P < 0.05) lower than the Control (9.6 ± 1.7), MBZ (5.0 ± 1.5), and CS-FA (5.2 ± 1) groups. In addition, the CS-FA-MBZ treated mice exhibited about 52.1%, 27.3%, and 17% more survival days after the cancer cells injection in comparison with the Control, MBZ, and CS-FA groups, respectively. Moreover, the CS-FA-MBZ implants were completely biocompatible based on histopathology and blood biochemical analyzes. CONCLUSION Taking together, CS-FA-MBZ implants were completely biodegradable and biocompatible with high therapeutic efficacy in a murine TNBC model.
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Affiliation(s)
- Amirhosein Kefayat
- Cancer Prevention Research Center, Department of Oncology, Isfahan University of Medical Sciences, 81746-73461, Isfahan, Iran.,Biosensor Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Maryam Hosseini
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), 1591634311, Tehran, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, School of Paramedicine, Arak University of Medical Sciences, Arak, Iran
| | - Nafise Arbab Jolfaie
- Biosensor Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Rafienia
- Biosensor Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
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Arkaban H, Karimi Shervedani R, Yaghoobi F, Kefayat A, Ghahremani F. Imaging and therapeutic capabilities of the AuNPs@MnCO3/Mn3O4, coated with PAA and integrated with folic acid, doxorubicin and propidium iodide for murine breast cancer. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2021.102818] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Mahdevar E, Kefayat A, Safavi A, Behnia A, Hejazi SH, Javid A, Ghahremani F. Immunoprotective effect of an in silico designed multiepitope cancer vaccine with BORIS cancer-testis antigen target in a murine mammary carcinoma model. Sci Rep 2021; 11:23121. [PMID: 34848739 PMCID: PMC8632969 DOI: 10.1038/s41598-021-01770-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 10/27/2021] [Indexed: 12/21/2022] Open
Abstract
In our previous study, immunoinformatic tools were used to design a novel multiepitope cancer vaccine based on the most immunodominant regions of BORIS cancer-testis antigen. The final vaccine construct was an immunogenic, non-allergenic, and stable protein consisted of multiple cytotoxic T lymphocytes epitopes, IFN-γ inducing epitopes, and B cell epitopes according to bioinformatic analyzes. Herein, the DNA sequence of the final vaccine construct was placed into the pcDNA3.1 vector as a DNA vaccine (pcDNA3.1-VAC). Also, the recombinant multiepitope peptide vaccine (MPV) was produced by a transfected BL21 E. coli strain using a recombinant pET-28a vector and then, purified and screened by Fast protein liquid chromatography technique (FPLC) and Western blot, respectively. The anti-tumor effects of prophylactic co-immunization with these DNA and protein cancer vaccines were evaluated in the metastatic non-immunogenic 4T1 mammary carcinoma in BALB/c mice. Co-immunization with the pcDNA3.1-VAC and MPV significantly (P < 0.001) increased the serum levels of the MPV-specific IgG total, IgG2a, and IgG1. The splenocytes of co-immunized mice exhibited a significantly higher efficacy to produce interleukin-4 and interferon-γ and proliferation in response to MPV in comparison with the control. The prophylactic co-immunization regime caused significant breast tumors' growth inhibition, tumors' weight decrease, inhibition of metastasis formation, and enlarging tumor-bearing mice survival time, without any considerable side effects. Taking together, this cancer vaccine can evoke strong immune response against breast tumor and inhibits its growth and metastasis.
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MESH Headings
- Animals
- Cancer Vaccines/chemistry
- Cancer Vaccines/immunology
- Cell Line
- Cell Line, Tumor
- Cell Proliferation
- Chromatography, Liquid
- Computational Biology
- Computer Simulation
- DNA-Binding Proteins/biosynthesis
- Disease Models, Animal
- Epitopes
- Female
- Immunity, Humoral
- Interferon-gamma/chemistry
- Mammary Neoplasms, Animal/immunology
- Mammary Neoplasms, Animal/prevention & control
- Mammary Neoplasms, Animal/therapy
- Mammary Neoplasms, Experimental/immunology
- Mammary Neoplasms, Experimental/prevention & control
- Mammary Neoplasms, Experimental/therapy
- Mice
- Mice, Inbred BALB C
- Neoplasm Metastasis
- T-Lymphocytes, Cytotoxic/immunology
- Vaccines, Subunit
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Affiliation(s)
- Elham Mahdevar
- Department of Biological Sciences, Faculty of Science and Engineering, Science and Arts University, Yazd, Iran
| | - Amirhosein Kefayat
- Department of Oncology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ashkan Safavi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Amirhossein Behnia
- Department of Biology, Faculty of the Basic Sciences, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - Seyed Hossein Hejazi
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Amaneh Javid
- Department of Biological Sciences, Faculty of Science and Engineering, Science and Arts University, Yazd, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, School of Paramedicine, Arak University of Medical Sciences, Arak, Iran.
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Kefayat A, Amouheidari A, Ghahremani F, Alirezaei Z. Diagnostic and prognostic value of stem cell factor plasma level in glioblastoma multiforme patients. Cancer Med 2021; 10:5154-5162. [PMID: 34250760 PMCID: PMC8335833 DOI: 10.1002/cam4.4073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 05/31/2021] [Accepted: 05/31/2021] [Indexed: 01/21/2023] Open
Abstract
Background Investigation of novel blood‐circulating agents as potential biomarkers for glioblastoma multiforme (GBM) patients’ diagnosis and monitoring has gained lots of attention, due to limitations of imaging modalities and invasive tissue biopsy procedures. The present study aims to assess the diagnostic and prognostic values of preoperative stem cell factor (SCF) plasma level in GBM patients. Methods Preoperative plasma samples from 58 GBM patients and 20 patients with nonglial tumors and 30 healthy controls were obtained. SCF levels were measured by employing the enzyme‐linked immunosorbent assay test and the values were compared between these three groups. Then, the association of SCF plasma level and tumor volume, progression‐free survival (PFS), and overall survival (OS) for the GBM patients were evaluated. Results Mean preoperative SCF plasma level of the GBM patients (2.80 ± 1.52 ng/ml) was significantly higher (p < 0.0001) than the healthy controls (0.80 ± 0.24 ng/ml) and patients with nonglial tumor (1.41 ± 0.76 ng/ml). Receiver operating characteristic analysis revealed that the preoperative SCF plasma level could distinguish the GBM patients from healthy controls and patients with nonglial tumors with the area under curve values of 0.915 and 0.790, respectively. However, no significant association was observed between the GBM patients’ preoperative SCF plasma levels and tumors’ volume (Spearman Rho correlation coefficient, 0.1847; 95% CI, p = 0.1652). The GBM patients were divided into two subgroups based on mean preoperative SCF plasma levels (2.80 ng/ml). No significant difference was observed between the patients’ PFS (p = 0.3792) and OS (p = 0.1469) at these two subgroups. Conclusion Taking together, the SCF plasma level can serve as a novel diagnostic blood‐circulating biomarker for patients with GBM. However, its plasma level is not correlated with GBM patients’ tumor volume, PFS, or OS.
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Affiliation(s)
- Amirhosein Kefayat
- Department of Oncology, Isfahan University of Medical Sciences, Isfahan, Iran
| | | | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, School of Paramedicine, Arak University of Medical Sciences, Arak, Iran
| | - Zahra Alirezaei
- Department of Medical Physics and Radiotherapy, Isfahan University of Medical Sciences, Isfahan, Iran
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Ghahremani F, Sabbaghzadeh R, Ebrahimi S, Javid H, Ghahremani J, Hashemy SI. Pathogenic role of the SP/ NK1R system in GBM cells through inhibiting the thioredoxin system. Iran J Basic Med Sci 2021; 24:499-505. [PMID: 34094032 PMCID: PMC8143719 DOI: 10.22038/ijbms.2021.52902.11945] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 02/16/2021] [Indexed: 12/28/2022]
Abstract
OBJECTIVES Glioblastoma multiforme (GBM), a highly aggressive Grade IV brain tumor, is a significant public health issue due to its poor prognosis and incurability. Neuropeptide substance P (SP) plays a critical role in GBM tumor growth and development via activation of neurokinin-1receptor (NK1R). Moreover, SP is a pro-oxidant factor contributing to oxidative stress in various cell types. However, the link between SP and oxidative stress in cancer cells is not fully investigated. Here, we aimed to identify the effects of SP and NK1R antagonist, aprepitant, on the redox status of GBM cells. MATERIALS AND METHODS Resazurin assay was employed to determine the effect of aprepitant on viability of U87 glioblastoma cells. 2',7'-dichlorodihydrofluorescein diacetate (H2DCFDA) assay was employed to measure the levels of intracellular reactive oxygen species (ROS). A quantitative real-time polymerase chain reaction was applied to measure the expression of proteins of the thioredoxin system. Commercial kits (ZellBio GmbH) were also used to measure the enzymatic activity of these proteins. RESULTS We found that SP increased ROS level in U87 GBM cells, and aprepitant significantly reduced this effect. Furthermore, we found that SP could also affect the thioredoxin system, a central antioxidant enzyme defense system. SP reduced both expression and enzymatic activity of the thioredoxin system's proteins, Trx and thioredoxin reductase (TrxR) and these effects were significantly reduced by aprepitant. CONCLUSION Our results indicated that SP activation of NK1R represented a link between oxidative stress and GBM and highlighted the need for further validations in future studies.
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Affiliation(s)
- Fatemeh Ghahremani
- Department of Biology, Faculty of Science, Hakim Sabzevari University, Sabzevar, Iran
| | - Reihaneh Sabbaghzadeh
- Department of Biology, Faculty of Science, Hakim Sabzevari University, Sabzevar, Iran
| | - Safieh Ebrahimi
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hosein Javid
- Medical Laboratory Sciences Department, Varastegan Institute for Medical Sciences, Mashhad, Iran
| | - Javad Ghahremani
- Department of Medicine, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Isaac Hashemy
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Surgical Oncology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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Safavi A, Kefayat A, Mahdevar E, Abiri A, Ghahremani F. Exploring the out of sight antigens of SARS-CoV-2 to design a candidate multi-epitope vaccine by utilizing immunoinformatics approaches. Vaccine 2020; 38:7612-7628. [PMID: 33082015 PMCID: PMC7546226 DOI: 10.1016/j.vaccine.2020.10.016] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/25/2020] [Accepted: 10/06/2020] [Indexed: 12/12/2022]
Abstract
SARS-CoV-2 causes a severe respiratory disease called COVID-19. Currently, global health is facing its devastating outbreak. However, there is no vaccine available against this virus up to now. In this study, a novel multi-epitope vaccine against SARS-CoV-2 was designed to provoke both innate and adaptive immune responses. The immunodominant regions of six non-structural proteins (nsp7, nsp8, nsp9, nsp10, nsp12 and nsp14) of SARS-CoV-2 were selected by multiple immunoinformatic tools to provoke T cell immune response. Also, immunodominant fragment of the functional region of SARS-CoV-2 spike (400-510 residues) protein was selected for inducing neutralizing antibodies production. The selected regions' sequences were connected to each other by furin-sensitive linker (RVRR). Moreover, the functional region of β-defensin as a well-known agonist for the TLR-4/MD complex was added at the N-terminus of the vaccine using (EAAAK)3 linker. Also, a CD4 + T-helper epitope, PADRE, was used at the C-terminal of the vaccine by GPGPG and A(EAAAK)2A linkers to form the final vaccine construct. The physicochemical properties, allergenicity, antigenicity, functionality and population coverage of the final vaccine construct were analyzed. The final vaccine construct was an immunogenic, non-allergen and unfunctional protein which contained multiple CD8 + and CD4 + overlapping epitopes, IFN-γ inducing epitopes, linear and conformational B cell epitopes. It could form stable and significant interactions with TLR-4/MD according to molecular docking and dynamics simulations. Global population coverage of the vaccine for HLA-I and II were estimated 96.2% and 97.1%, respectively. At last, the final vaccine construct was reverse translated to design the DNA vaccine. Although the designed vaccine exhibited high efficacy in silico, further experimental validation is necessary.
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Affiliation(s)
- Ashkan Safavi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Elham Mahdevar
- Department of Biology, Faculty of Science and Engineering, Science and Arts University, Yazd, Iran
| | - Ardavan Abiri
- Department of Medicinal Chemistry, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, Arak School of Paramedicine, Arak University of Medical Sciences, Arak, Iran.
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Safavi A, Kefayat A, Mahdevar E, Ghahremani F, Nezafat N, Modarressi MH. Efficacy of co-immunization with the DNA and peptide vaccines containing SYCP1 and ACRBP epitopes in a murine triple-negative breast cancer model. Hum Vaccin Immunother 2020; 17:22-34. [PMID: 32497486 DOI: 10.1080/21645515.2020.1763693] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Multiepitope cancer vaccines have gained lots of attention for prophylactic and therapeutic purposes in cancer patients. In our previous study, multiepitope DNA and peptide cancer vaccines consisted of the most immunodominant epitopes of ACRBP and SYCP1 antigens were designed by bioinformatic tools. In this study, the effect of prophylactic co-immunization with these DNA and peptide cancer vaccines in the 4T1 breast cancer animal model was assessed. Serum levels of the peptide-specific IgG total, IgG2a and IgG1 were measured by enzyme-linked immunosorbent assay (ELISA). Also, the efficacy of the immunized mice splenocytes' for producing interleukin-4 (IL-4) and interferon-γ (IFN-γ) was evaluated. The co-immunization caused a significant (P < .05) increase in the serum levels of IgG1 and IgG2a. The co-immunized mice splenocytes exhibited significantly enhanced IL-4 (6.6-fold) and IFN-γ (19-fold) production. Also, their lymphocytes exhibited higher proliferation rate (3-fold) and granzyme B production (6.5-fold) in comparison with the control. The prophylactic co-immunization significantly decreased the breast tumors' volume (78%) and increased the tumor-bearing mice survival time (37.5%) in comparison with the control. Taking together, prophylactic co-immunization with these multiepitope DNA and peptide cancer vaccines can activate the immune system against breast cancer. However, further experiments are needed to evaluate their efficacy from different angles.
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Affiliation(s)
- Ashkan Safavi
- Department of Biology, Science and Research Branch, Islamic Azad University , Tehran, Iran
| | - Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences , Isfahan, Iran
| | - Elham Mahdevar
- Department of Biology, Faculty of Science and Engineering, Science and Arts University , Yazd, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, Arak School of Paramedicine, Arak University of Medical Sciences , Arak, Iran
| | - Navid Nezafat
- Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Shiraz University of Medical Sciences , Shiraz, Iran
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Kefayat A, Ghahremani F. Low dose radiation therapy for COVID-19 pneumonia: A double-edged sword. Radiother Oncol 2020; 147:224-225. [PMID: 32342874 PMCID: PMC7169900 DOI: 10.1016/j.radonc.2020.04.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, Arak School of Paramedicine, Arak University of Medical Sciences, Arak 38481-76941, Iran.
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Eskandarinia A, Kefayat A, Agheb M, Rafienia M, Amini Baghbadorani M, Navid S, Ebrahimpour K, Khodabakhshi D, Ghahremani F. A Novel Bilayer Wound Dressing Composed of a Dense Polyurethane/Propolis Membrane and a Biodegradable Polycaprolactone/Gelatin Nanofibrous Scaffold. Sci Rep 2020; 10:3063. [PMID: 32080256 PMCID: PMC7033255 DOI: 10.1038/s41598-020-59931-2] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 01/31/2020] [Indexed: 02/06/2023] Open
Abstract
One-layer wound dressings cannot meet all the clinical needs due to their individual characteristics and shortcomings. Therefore, bilayer wound dressings which are composed of two layers with different properties have gained lots of attention. In the present study, polycaprolactone/gelatin (PCL/Gel) scaffold was electrospun on a dense membrane composed of polyurethane and ethanolic extract of propolis (PU/EEP). The PU/EEP membrane was used as the top layer to protect the wound area from external contamination and dehydration, while the PCL/Gel scaffold was used as the sublayer to facilitate cells' adhesion and proliferation. The bilayer wound dressing was investigated regarding its microstructure, mechanical properties, surface wettability, anti-bacterial activity, biodegradability, biocompatibility, and its efficacy in the animal wound model and histopathological analyzes. Scanning electron micrographs exhibited uniform morphology and bead-free structure of the PCL/Gel scaffold with average fibers' diameter of 237.3 ± 65.1 nm. Significant anti-bacterial activity was observed against Staphylococcal aureus (5.4 ± 0.3 mm), Escherichia coli (1.9 ± 0.4 mm) and Staphylococcus epidermidis (1.0 ± 0.2 mm) according to inhibition zone test. The bilayer wound dressing exhibited high hydrophilicity (51.1 ± 4.9°), biodegradability, and biocompatibility. The bilayer wound dressing could significantly accelerate the wound closure and collagen deposition in the Wistar rats' skin wound model. Taking together, the PU/EEP-PCL/Gel bilayer wound dressing can be a potential candidate for biomedical applications due to remarkable mechanical properties, biocompatibility, antibacterial features, and wound healing activities.
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Affiliation(s)
- Asghar Eskandarinia
- Department of Biomaterials, Tissue Engineering and Nanotechnology, School of Advanced Medical Technologies, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Maria Agheb
- Department of Biomaterials, Tissue Engineering and Nanotechnology, School of Advanced Medical Technologies, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Rafienia
- Department of Biomaterials, Tissue Engineering and Nanotechnology, School of Advanced Medical Technologies, Isfahan University of Medical Sciences, Isfahan, Iran
- Biosensor Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Moloud Amini Baghbadorani
- Department of Biomaterials, Tissue Engineering and Nanotechnology, School of Advanced Medical Technologies, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sepehr Navid
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Karim Ebrahimpour
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Darioush Khodabakhshi
- Department of Biomaterials, Tissue Engineering and Nanotechnology, School of Advanced Medical Technologies, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, Arak School of Paramedicine, Arak University of Medical Sciences, Arak, Iran.
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Yaghoobi F, Karimi shervedani R, Torabi M, Kefayat A, Ghahremani F, Farzadniya A. Therapeutic effect of deferrioxamine conjugated to PEGylated gold nanoparticles and complexed with Mn(II) beside the CT scan and MRI diagnostic studies. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123917] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Samiei Foroushani M, Karimi Shervedani R, Kefayat A, Torabi M, Ghahremani F, Yaghoobi F. Folate-graphene chelate manganese nanoparticles as a theranostic system for colon cancer MR imaging and drug delivery: In-vivo examinations. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101223] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Kefayat A, Ghahremani F, Safavi A, Hajiaghababa A, Moshtaghian J. Spirulina extract enriched for Braun-type lipoprotein (Immulina®) for inhibition of 4T1 breast tumors' growth and metastasis. Phytother Res 2019; 34:368-378. [PMID: 31691383 DOI: 10.1002/ptr.6527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 09/21/2019] [Accepted: 09/28/2019] [Indexed: 12/27/2022]
Abstract
Spirulina platensis extracts have exhibited considerable anti-cancer effects. To investigate the efficacy of the Spirulina extract enriched for Braun-type lipoprotein (Immulina®) for breast cancer treatment, 4T1 breast tumor-bearing mice were treated with 40 mg/kg Immulina® daily and the tumors' growth and metastasis were assessed. Also, CD4, CD8, and CD56 staining were performed to investigate the Immulina® effect on the immune cells' recruitment to the tumors by immunohistochemistry. Immulina® could significantly (P < 0.001) inhibit 4T1 breast tumors' growth. Immulina®-treated group exhibited a 63% decrease in the tumors' volume in comparison with control (P < 0.001). Also, Immulina® could significantly (P < 0.001) decrease metastatic burden at the vital organs as 68% and 61% decrease in the liver and lungs metastatic colonies were observed, respectively. Also, Immulina® could increase mean survival time of the tumor-bearing mice for 29 days. The Spirulina-treated mice tumors contained significantly more infiltrated NK, CD4+, and CD8+ T lymphocytes in comparison with control. Taking together, Immulina® can be a safe anti-cancer supplement with the ability to cause direct apoptosis to the cancer cells and activate the immune system against tumor. This supplement with natural origin seems to have bright future to help breast cancer patients.
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Affiliation(s)
- Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, 81746-73461, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, Arak University of Medical Sciences, Arak, 38481-76941, Iran
| | - Ashkan Safavi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Jamal Moshtaghian
- Department of Biology, Faculty of Science, University of Isfahan, Isfahan, Iran
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Safavi A, Kefayat A, Ghahremani F, Mahdevar E, Moshtaghian J. Immunization using male germ cells and gametes as rich sources of cancer/testis antigens for inhibition of 4T1 breast tumors' growth and metastasis in BALB/c mice. Int Immunopharmacol 2019; 74:105719. [DOI: 10.1016/j.intimp.2019.105719] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/06/2019] [Accepted: 06/21/2019] [Indexed: 11/25/2022]
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17
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Yaghoubi Farani A, Mohammadi Y, Ghahremani F. Modeling farmers' responsible environmental attitude and behaviour: a case from Iran. Environ Sci Pollut Res Int 2019; 26:28146-28161. [PMID: 31363971 DOI: 10.1007/s11356-019-06040-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 07/22/2019] [Indexed: 05/17/2023]
Abstract
There is an increasing concern over the environmental degradation caused by agricultural activities especially in developing countries which mostly linked to farmer's behavior. Thus, this study aimed to model the responsible attitude and behavior of Iranian farmers in respect to environment. The Theory of Planned Behavior (TPB) was used as a basis for identification of the main determinants of the farmers' responsible environmental behavior. A survey of 400 farmers in the Hamedan Province, selected through a multistage stratified random sampling method. Data was gathered using a questionnaire which its validity and reliability were confirmed by a panel of agricultural and environmental experts and calculated Cronbach's alpha (0.65 ≤ α ≤ 0.80), respectively. Data were analyzed using structural equation modeling (SEM) to evaluate the strength of relationship between the constructs and test the overall model fit. Results of study showed that "using animal manure in the farms" was the most important behavior which farmers are responsibly doing to respect their environment but their least attention is given to "disposing cans and bottles after spraying." Also, the fitness indices of the model revealed that the TPB partially supported the farmers' responsible environmental behavior as perceived behavioral control and environmental attitude positively influenced the farmers' responsible environmental behavior but there was not observed any significant influence by subjective norm. Among the additional incorporated constructs, environmental awareness, ethical commitment, and environmental concern significantly had a positive influence on farmers' behavior by mediating role of the environmental attitude. The inclusion of new constructs in the TPB model was supported through improving the predictive power of the modified model in predicting farmers' responsible environmental behavior.
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Affiliation(s)
- Ahmad Yaghoubi Farani
- Department of Agricultural Extension and Education, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.
| | - Yaser Mohammadi
- Department of Agricultural Extension and Education, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
| | - Fatemeh Ghahremani
- Agricultural Extension and Education, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
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Safavi A, Kefayat A, Abiri A, Mahdevar E, Behnia AH, Ghahremani F. In silico analysis of transmembrane protein 31 (TMEM31) antigen to design novel multiepitope peptide and DNA cancer vaccines against melanoma. Mol Immunol 2019; 112:93-102. [PMID: 31079006 DOI: 10.1016/j.molimm.2019.04.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/25/2019] [Accepted: 04/30/2019] [Indexed: 12/18/2022]
Abstract
Multiepitope cancer vaccines are announcing themselves as the future of melanoma treatment. Herein, high immunogenic regions of transmembrane protein 31 (TMEM31) antigen were selected according to cytotoxic T lymphocytes' (CTL) epitopes and major histocompatibility complex (MHC) binding affinity through in silico analyses. The 32-62, 77-105, and 125-165 residues of the TMEM31 were selected as the immunodominant fragments. They were linked together by RVRR and HEYGAEALERAG motifs to improve epitopes separation and presentation. In addition, to activate helper T lymphocytes (HTL), Pan HLA DR-binding epitope (PADRE) peptide sequence and tetanus toxin fragment C (TTFrC) were incorporated into the final construct. Also, the Beta-defensin conserved domain was utilized in the final construct as a novel adjuvant for Toll-like receptor 4/myeloid differentiation factor (TLR4-MD) activation. The CTL epitopes, cleavage sites, post-translational modifications, TAP transport efficiency, and B cells epitopes were predicted for the peptide vaccine. The final construct contained multiple CTL and B cell epitopes. In addition, it showed 93.55% and 99.13% population coverage in the world for HLA I and HLA II, respectively. According to these preliminary results, the multiepitope cancer vaccine can be an appropriate choice for further experimental investigations.
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Affiliation(s)
- Ashkan Safavi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Ardavan Abiri
- Department of Medicinal Chemistry, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Elham Mahdevar
- Department of Biology, Faculty of Science and Engineering, Science and Arts University, Yazd, Iran
| | - Amir Hossein Behnia
- Department of Biology, Faculty of the Basic Sciences, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, Arak University of Medical Sciences, Arak, Iran
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Kefayat A, Ghahremani F, Motaghi H, Mehrgardi MA. Investigation of different targeting decorations effect on the radiosensitizing efficacy of albumin-stabilized gold nanoparticles for breast cancer radiation therapy. Eur J Pharm Sci 2019; 130:225-233. [DOI: 10.1016/j.ejps.2019.01.037] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/11/2019] [Accepted: 01/30/2019] [Indexed: 01/28/2023]
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Kefayat A, Ghahremani F, Motaghi H, Amouheidari A. Ultra-small but ultra-effective: Folic acid-targeted gold nanoclusters for enhancement of intracranial glioma tumors' radiation therapy efficacy. Nanomedicine 2018; 16:173-184. [PMID: 30594659 DOI: 10.1016/j.nano.2018.12.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 12/31/2022]
Abstract
The aim of the present study is to investigate folic acid and BSA decorated gold nanoclusters (FA-AuNCs) effect on the enhancement of intracranial C6 glioma tumors radiation therapy (RT) efficacy. Inductively coupled plasma optical emission spectrometry (ICP-OES) measurements exhibited about 2.5 times more FA-AuNCs uptake by C6 cancer cells (32.8 ng/106 cells) than the normal cells. FA-AuNCs had significantly higher concentration in the brain tumors (8.1 μg/mg) in comparison with surrounding normal brain tissue (4.3 μg/mg). Moreover, FA-AuNCs exhibited dose enhancement factor (DEF) of 1.6. The glioma-bearing rats' survival times were almost doubled at radiation therapy + FA-AuNCs (25.0 ± 1.5 days) in comparison with no-treatment group (12.8 ± 0.7 days). The Ki-67 labeling index was 48.89% ± 9.93 for control, 29.98% ± 8.32 for RT, and 11.53% ± 7.65 for RT + FA-AuNCs. Therefore, FA-AuNCs can be effective radiosensitizers for intracranial glioma tumors RT.
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Affiliation(s)
- Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics and Radiotherapy, Arak University of Medical Sciences, Arak, Iran..
| | - Hasan Motaghi
- Department of Science, Farhangian University, Tehran, Iran
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Ghahremani F, Kefayat A, Shahbazi-Gahrouei D, Motaghi H, Mehrgardi MA, Haghjooy-Javanmard S. AS1411 aptamer-targeted gold nanoclusters effect on the enhancement of radiation therapy efficacy in breast tumor-bearing mice. Nanomedicine (Lond) 2018; 13:2563-2578. [PMID: 30334677 DOI: 10.2217/nnm-2018-0180] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
AIM Herein, the AS1411 aptamer-targeted ultrasmall gold nanoclusters (GNCs) were assessed at different aspects as a radiosensitizer. MATERIALS & METHODS AS1411 aptamer-conjugated gold nanoclusters (Apt-GNCs) efficacy was evaluated at cancer cells targeting, radiosensitizing effect, tumor targeting, and biocompatibility in breast tumor-bearing mice. RESULTS Flow cytometry and fluorescence microscopy exhibited more cellular uptake for Apt-GNCs in comparison with GNCs. In addition, inductively coupled plasma optical emission spectrometry results demonstrated its effective tumor targeting as the tumors' gold content for GNCs and Apt-GNCs were 8.53 and 15.33 μg/g, respectively. Apt-GNCs significantly enhanced radiotherapy efficacy as mean tumors' volume decreased about 39% and 9 days increase in the mice survival was observed. Both GNCs and Apt-GNCs were biocompatible. CONCLUSION The Apt-GNCs is a novel and efficient radiosensitizer.
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Affiliation(s)
- Fatemeh Ghahremani
- Department of Medical Physics & Radiotherapy, Arak University of Medical Sciences, Arak 38481-76941, Iran.,Department of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran.,Department of Oncology, Seyed Al-Shohada Hospital, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Daryoush Shahbazi-Gahrouei
- Department of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Hasan Motaghi
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Masoud A Mehrgardi
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Shaghayegh Haghjooy-Javanmard
- Department of Physiology, Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan 81746-73461, Iran
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Kefayat A, Ghahremani F, Motaghi H, Rostami S, Mehrgardi MA. Alive attenuated Salmonella as a cargo shuttle for smart carrying of gold nanoparticles to tumour hypoxic regions. J Drug Target 2018; 27:315-324. [DOI: 10.1080/1061186x.2018.1523417] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Oncology, Seyed Al-Shohada Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics & Radiotherapy, School of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Hasan Motaghi
- Department of Chemistry, University of Isfahan, Isfahan, Iran
| | - Soodabeh Rostami
- Nosocomial Infection Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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Ghahremani F, Shahbazi-Gahrouei D, Kefayat A, Motaghi H, Mehrgardi MA, Javanmard SH. AS1411 aptamer conjugated gold nanoclusters as a targeted radiosensitizer for megavoltage radiation therapy of 4T1 breast cancer cells. RSC Adv 2018. [DOI: 10.1039/c7ra11116a] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the present study, AS1411 aptamer conjugated gold nanoclusters (GNCs) have been introduced as a targeted radiosensitizer for enhancing megavoltage radiation therapy efficacy.
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Affiliation(s)
- Fatemeh Ghahremani
- Department of Medical Physics
- School of Medicine
- Isfahan University of Medical Sciences
- Isfahan 81746-73461
- Iran
| | - Daryoush Shahbazi-Gahrouei
- Department of Medical Physics
- School of Medicine
- Isfahan University of Medical Sciences
- Isfahan 81746-73461
- Iran
| | - Amirhosein Kefayat
- Cancer Prevention Research Center
- Isfahan University of Medical Sciences
- Isfahan 81746-73461
- Iran
- Department of Oncology
| | - Hasan Motaghi
- Department of Chemistry
- University of Isfahan
- Isfahan 81746-73441
- Iran
| | | | - Shaghayegh Haghjooy Javanmard
- Department of Physiology
- Applied Physiology Research Center
- Cardiovascular Research Institute
- Isfahan University of Medical Sciences
- Isfahan 81746-73461
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Allahverdi M, Jaberi R, Aghili M, Ghahremani F, Geraily G. In vivo dosimetry with semiconductors in medium dose rate (MDR) brachytherapy for cervical cancer. Jpn J Radiol 2012. [PMID: 23207645 DOI: 10.1007/s11604-012-0160-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE This study was performed to evaluate the role of in vivo dosimetry with semiconductor detectors in gynaecological medium dose rate brachytherapy, and to compare the actual doses delivered to organs at risk (as measured using in vivo dosimetry) with those calculated during treatment planning. MATERIALS AND METHODS Doses to the rectum and bladder were measured in a group of patients with cervical carcinoma using semiconductor detectors and compared to the doses calculated using a treatment planning system. 36 applications of brachytherapy at dose rates of 1.8-2.3 Gy/h were performed in the patients. RESULTS The mean differences between the measured and calculated doses were 3 % for the rectum and 11 % for the bladder. CONCLUSIONS The main reason for the differences between the measured and calculated doses was patient movement. To reduce the risk of large errors in the dose delivered, in vivo dosimetry should be performed in addition to treatment planning system computations.
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Affiliation(s)
- Mahmoud Allahverdi
- Department of Medical Physics, Tehran University of Medical Sciences, Tehran, Iran
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Alikhani A, Ghahremani F, Behzadipour S, Ebrahimi B. Design and Implementation of a PC-based Controller for a New Cable Driven Robot. Robotics 2010. [DOI: 10.2316/p.2010.703-035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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26
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Härtl R, Medary MB, Ruge M, Arfors KE, Ghahremani F, Ghajar J. Hypertonic/hyperoncotic saline attenuates microcirculatory disturbances after traumatic brain injury. J Trauma 1997; 42:S41-7. [PMID: 9191695 DOI: 10.1097/00005373-199705001-00008] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Traumatic brain injury (TBI) induces an acute inflammatory response characterized by early recruitment of inflammatory cells (white blood cells). Rapid resuscitation of TBI with hypertonic saline/dextran (HS/DEX) yields promising results in clinical and experimental studies. The purpose of this paper was to test the hypothesis that HS/DEX exerts its effects in part through a modulation of the acute inflammatory response to TBI. METHODS Rabbits equipped with chronic cranial windows underwent fluid-percussion injury and were followed up for 6 hours. Intravital fluorescence videomicroscopy technique was used to visualize white blood cell trafficking and to measure pia vessel diameters and venular shear rates. Three groups were studied: sham (group I, n = 5), trauma (group II, n = 7), and trauma and 4 mL/kg 7.2% NaCl/10% dextran 60 IV over 5 minutes at 10 minutes after TBI (group III, n = 7). RESULTS TBI in groups II and III led to significant increases of intracranial pressure. Arteriolar diameters after trauma increased by 17 +/- 8% at 6 hours in group II. Infusion of HS/DEX completely prevented this secondary diameters increase. At 6 hours, the increase of "sticking" white blood cells in group III was reduced by approximately 90% compared with group II. CONCLUSIONS Whether the anti-inflammatory effect of HS/DEX plays a role in reducing delayed brain damage (> 6 hours after TBI) or other systemic complications of TBI arises as an important question and should be investigated further.
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Affiliation(s)
- R Härtl
- Aitken Neuroscience Institute, New York, NY 10021, USA
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