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Ashil AM, Sharma A, Jose LK, Grover S, Kochar AS, Varghese ST, Sharma T, Ismail PMS. A CBCT Assessment of Orthodontic Mini-Implant Placement. J Pharm Bioallied Sci 2024; 16:S927-S929. [PMID: 38595369 PMCID: PMC11000927 DOI: 10.4103/jpbs.jpbs_1102_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/24/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 04/11/2024] Open
Abstract
Objectives This study compares the precision of cone beam computed tomography (CBCT) and two-dimensional radiography for mini-implant implantation. Materials and Method For 30 sites (in 15 patients between the ages of 13 and 26 years), the buccal interradicular region among the 2nd premolar and 1st molar was found to be the best location for mini-implants. Next, two groups of the mini-implant implantation process were created. Mini-implants were positioned at the CBCT data-identified sites in the CBCT group. Mini-implants were inserted in the RVG group by using two-dimensional digital radiography and a specially constructed guide. To assess the precision of the mini-implant implantation, post-placement CBCT images were acquired. The obtained data were statistically analyzed. Result The two groups showed a statistically considerable variation in the mini-implant placement's departure from the optimal height. Due to the smaller interradicular space and decreased convenience in the posterior mandibular area, two out of 15 mini-implants in the RVG group demonstrated root contact in the mandibular jaw. Conclusion The two-dimensional intraoral radiograph of the interradicular area provides sufficient information for mini-implant placement even though CBCT accurately visualizes the interradicular space in three dimensions.
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Affiliation(s)
- AM Ashil
- Additional Professor, Department of Orthodontics, Government Dental College, Kannur Pariyaram Medical College, Kerala, India
| | - Aseem Sharma
- Reader, Department of Orthodontics and Dentofacial Orthopedics, Himachal Institute of Dental Sciences, Paonta Sahib, Himachal Pradesh, India
| | - Lijo K Jose
- Professor, Department of Orthodntics, PSM College of Dental Science and Research, Akkikavu, Thrissur, Kerala, India
| | - Shubhi Grover
- Senior Lecturer, Department of Prosthodntics, Crown and Bridge, Uttaranchal Dental and Medical Research Institute, Dehradun, Uttarakhand, India
| | | | - Shaji T. Varghese
- Professor and HOD, PSM College of Dental Science, Thrissur, Kerala, India
| | - Tanushree Sharma
- Senior Resident, Department of Dentistry, Government Medical College, Kathua, Jammu and Kashmir, India
| | - Prabu Mahin Syed Ismail
- GCD, Pro Positive Health, Assistant Professor, Department of Restorative Dentistry, College of Dentistry in Arrass, Qassim Univesrity, Kingdom of Saudi Arabia
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Pinheiro MS, Dias JBL, Petrucci MP, Travassos CEPF, Mendes GS, Santos N. Molecular Characterization of Avian Rotaviruses F and G Detected in Brazilian Poultry Flocks. Viruses 2023; 15:v15051089. [PMID: 37243175 DOI: 10.3390/v15051089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/27/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023] Open
Abstract
Avian rotaviruses (RVs) are important etiologic agents of gastroenteritis in birds. In general, avian RVs are understudied; consequently, there is a paucity of information regarding these viruses. Therefore, the characterization of these viral species is highly relevant because more robust information on genetic, epidemiologic, and evolutionary characteristics can clarify the importance of these infections, and inform efficient prevention and control measures. In this study, we describe partial genome characterizations of two avian RV species, RVF and RVG, detected in asymptomatic poultry flocks in Brazil. Complete or partial sequences of at least one of the genomic segments encoding VP1, VP2, VP4, VP6, VP7, NSP1, NSP4, NSP4, or NSP5 of 23 RVF and 3 RVG strains were obtained, and demonstrated that multiple variants of both RVF and RVG circulate among Brazilian poultry. In this study, new and important information regarding the genomic characteristics of RVF and RVG is described. In addition, the circulation of these viruses in the study region and the genetic variability of the strains detected are demonstrated. Thus, the data generated in this work should help in understanding the genetics and ecology of these viruses. Nonetheless, the availability of a greater number of sequences is necessary to advance the understanding of the evolution and zoonotic potential of these viruses.
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Affiliation(s)
- Mariana S Pinheiro
- Instituto de Microbiologia Paulo de Góes, Departamento de Virologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21947-902, Brazil
| | - Juliana B L Dias
- Instituto de Microbiologia Paulo de Góes, Departamento de Virologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21947-902, Brazil
| | - Melissa P Petrucci
- Centro de Ciências e Tecnologias Agropecuárias, Laboratório de Sanidade Animal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes 28013-602, Brazil
| | - Carlos E P F Travassos
- Centro de Ciências e Tecnologias Agropecuárias, Laboratório de Sanidade Animal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes 28013-602, Brazil
| | - Gabriella S Mendes
- Instituto de Microbiologia Paulo de Góes, Departamento de Virologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21947-902, Brazil
| | - Norma Santos
- Instituto de Microbiologia Paulo de Góes, Departamento de Virologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21947-902, Brazil
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Pinheiro MS, Dias JBL, Cunha BRAV, Petrucci MP, Travassos CEPF, Mendes GS, Santos N. Rotavirus F and G circulating in chickens in Southeastern Brazil. Trop Anim Health Prod 2022; 54:113. [PMID: 35217986 DOI: 10.1007/s11250-022-03113-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 12/15/2021] [Accepted: 02/18/2022] [Indexed: 10/19/2022]
Abstract
Rotavirus (RV) infections represent a significant cause of enteritis and diarrhea in avian species and pose a major concern for the poultry industry. However, the prevalence of rotavirus infections among birds is poorly understood. Stool samples were collected from laying and broiler hens from commercial poultry farms in the states of Rio de Janeiro and Espírito Santo, Southwest region of Brazil, for detection of rotavirus species F and G (RVF and RVG, respectively) by reverse transcription polymerase chain reaction. RV was detected in 11.7% (38/325) of samples: 35 samples were positive for RVF and 3 for RVG. RVF was detected in 15 samples from Rio de Janeiro and 23 samples from Espírito Santo. RVG was detected in 3 samples from Espírito Santo. All the positive samples were from asymptomatic broiler chickens. The prevalence of RV infection in these flocks was high, especially considering that the birds had no apparent clinical disease. Silent circulation in the herds signifies the need for a continuous surveillance program to guide measures to control and prevent this viral infection. Continuous monitoring of pathogens is crucial to ensure greater productivity on poultry farms.
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Affiliation(s)
- Mariana S Pinheiro
- Instituto de Microbiologia Paulo de Góes, Universidade Federal Do Rio de Janeiro, 21.947-902, Rio de Janeiro, RJ, Brazil
| | - Juliana B L Dias
- Instituto de Microbiologia Paulo de Góes, Universidade Federal Do Rio de Janeiro, 21.947-902, Rio de Janeiro, RJ, Brazil
| | - Beatriz R A V Cunha
- Instituto de Microbiologia Paulo de Góes, Universidade Federal Do Rio de Janeiro, 21.947-902, Rio de Janeiro, RJ, Brazil
| | - Melissa P Petrucci
- Universidade Estadual Do Norte Fluminense Darcy Ribeiro, 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Carlos E P F Travassos
- Universidade Estadual Do Norte Fluminense Darcy Ribeiro, 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Gabriella S Mendes
- Instituto de Microbiologia Paulo de Góes, Universidade Federal Do Rio de Janeiro, 21.947-902, Rio de Janeiro, RJ, Brazil
| | - Norma Santos
- Instituto de Microbiologia Paulo de Góes, Universidade Federal Do Rio de Janeiro, 21.947-902, Rio de Janeiro, RJ, Brazil. .,Departamento de Virologia, Centro de Ciências da Saúde, Instituto de Microbiologia Paulo de Góes, Universidade Federal Do Rio de Janeiro, Av. Carlos Chagas Filho - 373, Cidade Universitária, 21.941-902, Rio de Janeiro, RJ, Brazil.
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Mendonça MCP, Cronin MF, Cryan JF, O'Driscoll CM. Modified cyclodextrin-based nanoparticles mediated delivery of siRNA for huntingtin gene silencing across an in vitro BBB model. Eur J Pharm Biopharm 2021; 169:309-318. [PMID: 34793942 DOI: 10.1016/j.ejpb.2021.11.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 08/20/2021] [Revised: 10/19/2021] [Accepted: 11/10/2021] [Indexed: 01/21/2023]
Abstract
Huntington's disease (HD) is a neurodegenerative disorder caused by a mutation in the huntingtin (HTT) gene, leading to a toxic version of the HTT protein. There are currently no disease-modifying therapies available. In this scenario, gene-based treatments for HD aimed at lowering HTT levels have become one of the most promising emerging therapeutic options. To date, however, promising results have only been achieved following direct intrathecal or intracranial injections designed to circumvent the blood-brain barrier (BBB). Consequently, efforts to develop less invasive delivery platforms are highly desirable. Here, we described a novel delivery system based on modified cyclodextrin nanoparticles (CDs) loaded with small interfering RNAs (siRNAs) targeting HTT andcomplexed with the rabies virus glycoprotein(RVG), a BBB-shuttle peptide. Results using an in vitro BBB model, indicate the formulation successfully crosses the brain endothelial cells, releases the encapsulated siRNAs into the cytoplasm of neuronal cells, and mediates downregulation of HTT. In conclusion, the CD platform is a promising option for delivery of siRNA-based therapeutics for HD with wider potential to treat other diseases with a genetically validated target in the central nervous system.
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Affiliation(s)
| | - Michael F Cronin
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Ireland
| | - John F Cryan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
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Xu J, Yang X, Ji J, Gao Y, Qiu N, Xi Y, Liu A, Zhai G. RVG-functionalized reduction sensitive micelles for the effective accumulation of doxorubicin in brain. J Nanobiotechnology 2021; 19:251. [PMID: 34419071 PMCID: PMC8379803 DOI: 10.1186/s12951-021-00997-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 05/19/2021] [Accepted: 08/14/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Glioblastoma is a lethal neoplasm with few effective therapy options. As a mainstay in the current treatment of glioma at present, chemotherapeutic agents usually show inadequate therapeutic efficiency due to their low blood brain barrier traversal and brain targeting, together with tumor multidrug resistance. Novel treatment strategies are thus urgently needed to improve chemotherapy outcomes. RESULTS Here, we report that nanomedicines developed by functionalizing the neurotropic rabies virus-derived polypeptide, RVG, and loading reduction-sensitive nanomicelles (polymer and doxorubicin) enable a highly specific and efficacious drug accumulation in the brain. Interestingly, curcumin serves as the hydrophobic core of the polymer, while suppressing the major efflux proteins in doxorubicin-resistant glioma cells. Studies on doxorubicin-resistant rat glioma cells demonstrate that the RVG-modified micelles exhibit superior cell entry and antitumor activity. In vivo research further showed that RVG modified nanomicelles significantly enhanced brain accumulation and tumor inhibition rate in mice, leading to a higher survival rate with negligible systemic toxicity. Moreover, effective suppression of recurrence and pulmonary metastatic nodules were also determined after the RVG-modified nanomicelles treatment. CONCLUSIONS The potential of RVG-modified nanomicelles for glioma was demonstrated. Brain accumulation was markedly enhanced after intravenous administration. This unique drug delivery nanoplatform to the brain provides a novel and powerful therapeutic strategy for the treatment of central nervous system disorders including glioma.
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Affiliation(s)
- Jiangkang Xu
- Department of Pharmaceutics, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, People's Republic of China
| | - Xiaoye Yang
- Department of Pharmaceutics, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, People's Republic of China
| | - Jianbo Ji
- Department of Pharmaceutics, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, People's Republic of China
| | - Yuan Gao
- Department of Pharmaceutics, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, People's Republic of China
| | - Na Qiu
- Department of Pharmaceutics, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, People's Republic of China
| | - Yanwei Xi
- Department of Pharmaceutics, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, People's Republic of China
| | - Anchang Liu
- Department of Pharmacy, Qilu Hospital of Shandong University, 107 WenhuaXilu, Jinan, 250012, China.
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Shandong University, 44 WenhuaXilu, Jinan, 250012, China.
| | - Guangxi Zhai
- Department of Pharmaceutics, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, People's Republic of China.
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Yu Y, Li W, Mao L, Peng W, Long D, Li D, Zhou R, Dang X. Genetically engineered exosomes display RVG peptide and selectively enrich a neprilysin variant: a potential formulation for the treatment of Alzheimer's disease. J Drug Target 2021; 29:1128-1138. [PMID: 34182845 DOI: 10.1080/1061186x.2021.1929257] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 12/14/2022]
Abstract
Exosome is a promising next generation nano-based drug delivery vehicle. However, the unknown molecular mechanisms underlying its natural tissue tropism and the relatively low quantity of naturally enriched molecules of therapeutic value hamper exosome's clinical application. The aim of the research was to create a targeted and highly efficacious exosome formulation for the treatment of Alzheimer's disease (AD). Genetic engineering techniques combined with co-transfection of parental cells were employed to create an exosome formulation that displays RVG peptide on its surface targeting α7-nAChR and simultaneously enriches a neprilysin variant with increased specificity and efficacy in degrading β amyloid peptide (Aβ). The exosome formulation was preferentially internalised into cell lines in an α7-nAChR expression level-dependent manner. When incubated with Aβ-producing N2a cells, it significantly decreased intracellular and secreted Aβ40 levels, a potency that is superior to exosomes derived from adipose-derived stem cell. When systemically administered into mice, the exosome formulation was preferentially targeted to the hippocampus region of the brain and significantly decreased the expression of proinflammatory genes, IL1α, TNFα and NF-κB, and simultaneously increased the expression of anti-inflammatory gene, IL10. Our exosome formulation may be explored as an over-the-counter treatment for AD.
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Affiliation(s)
- Yonghe Yu
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China
| | - Wei Li
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China
| | - Liang Mao
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China
| | - Wanling Peng
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China
| | - Dandan Long
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China
| | - Dongmei Li
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China
| | - Rui Zhou
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China.,Department of Cardiology, Shaanxi Institute for Pediatric Diseases, Xi'an Key Laboratory of Children's Health and Diseases, Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xitong Dang
- The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Luzhou, China.,Department of Cardiovascular Medicine, The 1st Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, China
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Dos Santos Rodrigues B, Arora S, Kanekiyo T, Singh J. Efficient neuronal targeting and transfection using RVG and transferrin-conjugated liposomes. Brain Res 2020; 1734:146738. [PMID: 32081534 DOI: 10.1016/j.brainres.2020.146738] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [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: 08/16/2019] [Revised: 01/18/2020] [Accepted: 02/15/2020] [Indexed: 12/22/2022]
Abstract
Effective transport of therapeutic nucleic acid to brain has been a challenge for the success of gene therapy for treating brain diseases. In this study, we proposed liposomal nanoparticles modified with brain targeting ligandsfor active brain targeting with enhanced BBB permeation and delivery of genes to brain. We targeted transferrin and nicotinic acetylcholine receptors by conjugating transferrin (Tf) and rabies virus glycoprotein (RVG) peptide to surface of liposomes. Liposomal formulations showed homogeneous particle size and ability to protect plasmid DNA against enzymatic degradation. These nanoparticles were internalized by brain endothelial cells, astrocytes and primary neuronal cells through energy-dependent endocytosis pathways. RVG-Tf coupled liposomes showed superior ability to transfect cells compared to liposomes without surface modification or single modification. Characterization of permeability through blood brain barrier (BBB) and functionality of designed liposomes were performed using an in vitro triple co-culture BBB model. Liposome-RVG-Tf efficiently translocated across in vitro BBB model and, consecutively, transfected primary neuronal cells. Notably, brain-targeted liposomes promoted in vivo BBB permeation. These studies suggest that modifications of liposomes with brain-targeting ligands are a promising strategy for delivery of genes to brain.
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Affiliation(s)
- Bruna Dos Santos Rodrigues
- Department of Pharmaceutical Sciences, School of Pharmacy, College of Health Professions, North Dakota State University, Fargo, ND 58105, USA
| | - Sanjay Arora
- Department of Pharmaceutical Sciences, School of Pharmacy, College of Health Professions, North Dakota State University, Fargo, ND 58105, USA
| | - Takahisa Kanekiyo
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA
| | - Jagdish Singh
- Department of Pharmaceutical Sciences, School of Pharmacy, College of Health Professions, North Dakota State University, Fargo, ND 58105, USA.
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Garnica O, Das K, Devasundaram S, Dhandayuthapani S. Enhanced delivery of Mycobacterium tuberculosis antigens to antigen presenting cells using RVG peptide. Tuberculosis (Edinb) 2019; 116S:S34-S41. [PMID: 31064713 DOI: 10.1016/j.tube.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 11/19/2018] [Accepted: 11/19/2018] [Indexed: 10/26/2022]
Abstract
Among the various strategies to improve vaccines against infectious diseases, targeting of antigens to dendritic cells (DCs), which are professional antigen presenting cells (APCs), has received increased attention in recent years. Here, we investigated whether a synthetic peptide region named RVG, originated from Rabies Virus Glycoprotein that binds to the α-7 subunit of the nicotinic acetylcholine receptors (AchR-α7) of APCs, could be used for the delivery of Mycobacterium tuberculosis (Mtb) peptide antigens to DCs and macrophages. Mouse bone marrow derived DCs (BMDCs) and human THP-1 macrophages stimulated with RVG fused peptide epitopes 85B241 and 85B96 (represent Ag85B241-256 and Ag85B96-111, respectively) from antigen 85B (Ag85B) of Mtb showed enhanced antigen presentation as compared to unfused peptide epitopes and BCG. Further, BMDCs stimulated with RVG fused 85B241 showed higher levels of IL-12 positive cells. Consistent with in vitro data, splenocytes of mice immunized with RVG-85B241 showed increased number of antigen specific IFN-γ, IL-2, and TNF-α producing cells in relation to splenocytes from mice immunized with 85B241 alone. These results suggest that RVG may be a promising tool to develop effective alternate vaccines against tuberculosis (TB).
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Affiliation(s)
- Omar Garnica
- Center of Emphasis in Infectious Diseases and Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center El Paso, El Paso, TX, 79905, USA
| | - Kishore Das
- Center of Emphasis in Infectious Diseases and Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center El Paso, El Paso, TX, 79905, USA
| | - Santhi Devasundaram
- Center of Emphasis in Infectious Diseases and Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center El Paso, El Paso, TX, 79905, USA
| | - Subramanian Dhandayuthapani
- Center of Emphasis in Infectious Diseases and Department of Biomedical Sciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center El Paso, El Paso, TX, 79905, USA; Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, El Paso, TX, 79905, USA.
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Jia F, Miao H, Zhu X, Xu F. Pseudo-typed Semliki Forest virus delivers EGFP into neurons. J Neurovirol 2017; 23:205-15. [PMID: 27739033 DOI: 10.1007/s13365-016-0486-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 09/22/2016] [Accepted: 09/26/2016] [Indexed: 12/14/2022]
Abstract
Semliki Forest virus (SFV), a neurotropic virus, has been used to deliver heterologous genes into cells in vitro and in vivo. In this study, we constructed a reporter SFV4-FL-EGFP and found that it can deliver EGFP into neurons located at the injection site without disseminating throughout the brain. Lacking of the capsid gene of SFV4-FL-EGFP does not block its life cycle, while forming replication-competent virus-like particles (VLPs). These VLPs hold subviral genome by using the packaging sequence (PS) located within the nsP2 gene, and can transfer their genome into cells. In addition, we found that the G protein of vesicular stomatitis virus (VSVG) can package SFV subviral genome, which is consistent with the previous reports. The G protein of rabies virus (RVG) could also package SFV subviral genome. These pseudo-typed SFV can deliver EGFP gene into neurons. Taken together, these findings may be used to construct various SFV-based delivery systems for virological studies, gene therapy, and neural circuit labeling.
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Gooding M, Malhotra M, McCarthy DJ, Godinho BMDC, Cryan JF, Darcy R, O'Driscoll CM. Synthesis and characterization of rabies virus glycoprotein-tagged amphiphilic cyclodextrins for siRNA delivery in human glioblastoma cells: in vitro analysis. Eur J Pharm Sci 2015; 71:80-92. [PMID: 25703259 DOI: 10.1016/j.ejps.2015.02.007] [Citation(s) in RCA: 52] [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] [Received: 09/18/2014] [Revised: 12/23/2014] [Accepted: 02/11/2015] [Indexed: 11/28/2022]
Abstract
In man brain cancer is an aggressive, malignant form of tumour, it is highly infiltrative in nature, is associated with cellular heterogeneity and affects cerebral hemispheres of the brain. Current drug therapies are inadequate and an unmet clinical need exists to develop new improved therapeutics. The ability to silence genes associated with disease progression by using short interfering RNA (siRNA) presents the potential to develop safe and effective therapies. In this work, in order to protect the siRNA from degradation, promote cell specific uptake and enhance gene silencing efficiency, a PEGylated cyclodextrin (CD)-based nanoparticle, tagged with a CNS-targeting peptide derived from the rabies virus glycoprotein (RVG) was formulated and characterized. The modified cyclodextrin derivatives were synthesized and co-formulated to form nanoparticles containing siRNA which were analysed for size, surface charge, stability, cellular uptake and gene-knockdown in brain cancer cells. The results identified an optimised co-formulation prototype at a molar ratio of 1:1.5:0.5 (cationic cyclodextrin:PEGylated cyclodextrin:RVG-tagged PEGylated cyclodextrin) with a size of 281 ± 39.72 nm, a surface charge of 26.73 ± 3 mV, with efficient cellular uptake and a 27% gene-knockdown ability. This CD-based formulation represents a potential nanocomplex for systemic delivery of siRNA targeting brain cancer.
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Affiliation(s)
- Matt Gooding
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland; Centre for Synthesis and Chemical Biology, University College Dublin, Dublin, Ireland
| | - Meenakshi Malhotra
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland
| | - David J McCarthy
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland
| | - Bruno M D C Godinho
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Lisbon School of Health Technology, Polytechnic Institute of Lisbon, Lisbon, Portugal
| | - John F Cryan
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - Raphael Darcy
- Centre for Synthesis and Chemical Biology, University College Dublin, Dublin, Ireland
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Turki I, Hammami A, Kharmachi H, Mousli M. Engineering of a recombinant trivalent single-chain variable fragment antibody directed against rabies virus glycoprotein G with improved neutralizing potency. Mol Immunol 2013; 57:66-73. [PMID: 24091293 DOI: 10.1016/j.molimm.2013.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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: 06/17/2013] [Revised: 08/14/2013] [Accepted: 08/18/2013] [Indexed: 10/26/2022]
Abstract
Human and equine rabies immunoglobulins are currently available for passive immunization against rabies. However, these are hampered by the limited supply and some drawbacks. Advances in antibody engineering have led to overcome issues of clinical applications and to improve the protective efficacy. In the present study, we report the generation of a trivalent single-chain Fv (scFv50AD1-Fd), that recognizes the rabies virus glycoprotein, genetically fused to the trimerization domain of the bacteriophage T4 fibritin, termed 'foldon' (Fd). scFv50AD1-Fd was expressed as soluble recombinant protein in bacterial periplasmic space and purified through affinity chromatography. The molecular integrity and stability were analyzed by polyacrylamide gradient-gel electrophoresis, size-exclusion chromatography and incubation in human sera. The antigen-binding properties of the trimeric scFv were analyzed by direct and competitive-ELISA. Its apparent affinity constant was estimated at 1.4 ± 0.25 × 10(9)M(-1) and was 75-fold higher than its monovalent scFv (1.9 ± 0.68 × 10(7)M(-1)). The scFv50AD1-Fd neutralized rabies virus in a standard in vitro and in vivo neutralization assay. We showed a high neutralization activity up to 75-fold compared with monovalent format and the WHO standard serum. The gain in avidity resulting from multivalency along with an improved biological activity makes the trivalent scFv50AD1-Fd construct an important reagent for rabies protection. The antibody engineering approach presented here may serve as a strategy for designing a new generation of anti-rabies for passive immunotherapy.
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Affiliation(s)
- Imène Turki
- Laboratoire de Parasitologie Médicale, Biotechnologies et Biomolécules, Institut Pasteur de Tunis, LR11-IPT06, 13 Place Pasteur - BP74, 1002 Tunis-Belvédère, Tunisia
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Tomar NR, Singh V, Marla SS, Chandra R, Kumar R, Kumar A. Molecular docking studies with rabies virus glycoprotein to design viral therapeutics. Indian J Pharm Sci 2011; 72:486-90. [PMID: 21218060 PMCID: PMC3013581 DOI: 10.4103/0250-474x.73905] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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: 10/09/2009] [Revised: 07/14/2010] [Accepted: 07/30/2010] [Indexed: 01/03/2023] Open
Abstract
The genome of rabies virus encodes five proteins; the nucleoprotein, the phosphoprotein, the matrix protein, the glycoprotein, and the RNA-dependent RNA polymerase. Among these, the glycoprotein is the most important as it is the major contributor to pathogenicity and virus neutralizing antibody response. Keeping in mind that glycoprotein is the only protein exposed on the surface of virus and is thought to be responsible for the interaction with the cell membrane, it was attempted to target glycoprotein by a ligand polyethylene glycol 4000, which blocks its active site, as seen by molecular operating environment software, so that it may be possible to prevent the spread of virus into the host. The ligand polyethylene glycol 4000 was retrieved from Research Collaboratory for Structural Bioinformatics protein data bank by providing the glycoprotein sequence to the databank. In this study it was observed that the ligand was successfully docked on a major portion of antigenic site II of glycoprotein by mimicking the virus neutralizing antibodies. This knowledge may be important for the development of novel therapies for the treatment of rabies and other viral diseases in the future.
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Affiliation(s)
- N R Tomar
- Department of Molecular Biology and Genetic Engineering, G. B. Pant University of Agriculture and Technology, Pantnagar-263 145, India
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Abstract
Introduction: It is a well-known fact that the assessment of the dental development can be related to an individual’s age, but after the age of 21 years when the wisdom teeth also complete their development, there arises a need for an optimal age estimation procedure. With advancing age, there is a reduction in the size of the pulp due to secondary dentin deposition and a measurement of this reduction can also be used as a parameter to assess the age of the individuals, both in the living and dead. Aims and Objectives: The purpose of the present study was to evaluate the feasibility of this approach in the estimation of age of adults, using Kvaal’s method in the set sample. Materials and Methods: The material consisted of the digital long-cone intraoral periapical radiographs from 50 subjects of either sex in the age group of 15–60 years, who were selected after evaluation for the set inclusion and exclusion criteria. The pulp width and length from radiographs of 6 selected teeth, namely, maxillary central incisor, lateral incisor, and second premolar and mandibular lateral incisor, canine, and first premolar of either right or left side were measured using the RVG trophy software [Trophy® Windows is a software program supplied by Trophy Radiologie (Trophy Windows Version 5.03, Copyright 1993-2002,Trophy RVG patented by Trophy, Chicago)]. In order to compensate for the differences in magnification and angulation, various ratios were calculated and the mean of all ratios (M) was taken as the first predictor, while the difference between the mean of 2 width ratios and the mean of 2 length ratios (W – L) was taken as the second predictor. Different regression formulae for all 6 teeth, 3 maxillary teeth, 3 mandibular teeth, and each of the individual teeth were derived and the age was assessed. The assessed age was then co-related with the actual age of the patient using the Student’s t test. Results: The results showed that the coefficient of determination (R2) was the strongest (0.198) for the mandibular first premolar indicating that age can be estimated better with this particular tooth. No significant difference was observed between the estimated age and the actual age for all (P>0.05) except in mandibular lateral incisor and maxillary lateral incisor, where a significant difference was observed. Conclusion: To conclude, the results of the present study suggest the feasibility of Kvaal’s method for age estimation in the set sample
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Affiliation(s)
- Ridhima Sharma
- Department of Oral Medicine and Radiology, Government Dental College and Hospital, Jaipur, India
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