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Kapoor D, Sharma P, Shukla D. Emerging drugs for the treatment of herpetic keratitis. Expert Opin Emerg Drugs 2024; 29:113-126. [PMID: 38603466 DOI: 10.1080/14728214.2024.2339899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 04/03/2024] [Indexed: 04/13/2024]
Abstract
INTRODUCTION Herpes simplex keratitis stands as a prominent factor contributing to infectious blindness among developed nations. On a global scale, over 60% of the population tests positive for herpes simplex virus type-1 (HSV-1). Despite these statistics, there is currently no vaccine available for the virus. Moreover, the conventional nucleoside drugs prescribed to patients are proving ineffective in addressing issues related to drug resistance, recurrence, latency, and the escalating risk of vision loss. Hence, it is imperative to continually explore all potential avenues to restrict the virus. This review article centers on the present treatment methods for HSV-1 keratitis (HSK), highlighting the ongoing clinical trials. It delves into the emerging drugs, their mode-of-action and future therapeutics. AREAS COVERED The review focuses on the significance of a variety of small molecules targeting HSV-1 lifecycle at multiple steps. Peer-reviewed articles and abstracts were searched in MEDLINE, PubMed, Embase, and clinical trial websites. EXPERT OPINION The exploration of small molecules that target specific pathways within the herpes lifecycle holds the potential for substantial impact on the antiviral pharmaceutical market. Simultaneously, the pursuit of disease-specific biomarkers has the capacity to usher in a transformative era in diagnostics within the field.
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Affiliation(s)
- Divya Kapoor
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, USA
- Department of Ophthalmology and Visual Sciences, University of Illinois Medical Center, Chicago, IL, USA
| | - Pankaj Sharma
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, USA
| | - Deepak Shukla
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, USA
- Department of Ophthalmology and Visual Sciences, University of Illinois Medical Center, Chicago, IL, USA
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Gagan S, Khapuinamai A, Kapoor D, Sharma P, Yadavalli T, Joseph J, Shukla D, Bagga B. Exploring Heparanase Levels in Tears: Insights From Herpes Simplex Virus-1 Keratitis Patients and Animal Studies. Invest Ophthalmol Vis Sci 2024; 65:7. [PMID: 38466284 DOI: 10.1167/iovs.65.3.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024] Open
Abstract
Purpose Heparanase (HPSE) cleaves heparan sulfate proteoglycans during herpes simplex virus-1 (HSV-1) infection, aiding in viral egress and disease progression. Its action has been well established in in vitro and in vivo models, but its relevance in human patients remains unclear. This study aimed to specifically evaluate tear HPSE levels of patients with herpes simplex keratitis (HSK) and to correlate these findings with a commonly used murine model. Methods Tear samples from patient and mice samples were collected at LV Prasad Eye Institute, Hyderabad, India, and at the University of Illinois, Chicago, IL, respectively. Tears were collected from HSV-1 patients, bacterial/fungal keratitis cases, and healthy individuals. For in vivo study, C57BL/6 mice were infected with HSV-1 (McKrae strain) followed by tear fluid collection at various time points (0-10 days). Results The HSV-1, bacterial keratitis, fungal keratitis, and healthy control groups each had 30 patients. There was a significant difference in HPSE expression in the HSV-1 infected eyes (1.55 ± 0.19 units/mL) compared to HSV-1 contralateral eyes (1.23 ± 0.13 units/mL; P = 0.82), bacterial keratitis eyes (0.87 ± 0.15 units/mL; P = 0.0078), fungal keratitis eyes (0.64 ± 0.09 units/mL; P < 0.00001), and normal controls (0.53 ± 0.06 units/mL; P < 0.00001). C57BL/6 mice tear HPSE expression in infected eyes was 0.66 to 5.57 ng heparan sulfate (HS) removed per minute when compared to non-infected eye (range, 0.70-3.67 ng HS removed per minute). Conclusions To the best of our knowledge, this study is the first to report elevated HPSE levels in the tears of patients with different forms of HSV-1 keratitis, and it confirms similar findings in a murine model, providing a valuable basis for future in vivo and clinical research on HSV-1 ocular infection.
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Affiliation(s)
- Satyashree Gagan
- Jhaveri Microbiology Centre, Brien Holden Eye Research Centre, LV Prasad Eye Institute, Hyderabad, Telangana, India
- Manipal Academy of Higher Education, Karnataka, India
| | - Agimanailiu Khapuinamai
- Jhaveri Microbiology Centre, Brien Holden Eye Research Centre, LV Prasad Eye Institute, Hyderabad, Telangana, India
| | - Divya Kapoor
- Department of Ophthalmology and Visual Science, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Pankaj Sharma
- Department of Ophthalmology and Visual Science, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Tejabhiram Yadavalli
- Department of Ophthalmology and Visual Science, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Joveeta Joseph
- Jhaveri Microbiology Centre, Brien Holden Eye Research Centre, LV Prasad Eye Institute, Hyderabad, Telangana, India
| | - Deepak Shukla
- Department of Ophthalmology and Visual Science, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Bhupesh Bagga
- Shantilal Shanghvi Cornea Institute, The Ramoji Foundation Centre for Ocular Infections, LV Prasad Eye Institute, Hyderabad, Telangana, India
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Yang Q, Wang S, He Y, Zhang Y. The research progress on the molecular mechanism of corneal cross-linking in keratoconus treatment. Cont Lens Anterior Eye 2023; 46:101795. [PMID: 36549953 DOI: 10.1016/j.clae.2022.101795] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 12/05/2022] [Accepted: 12/08/2022] [Indexed: 12/24/2022]
Abstract
Keratoconus (KC) is a corneal anomaly that is manifested in a limited cone-like bulge with corneal thinning. Many molecules in the cornea change during the development of KC, including various components of the extracellular matrix, cytokines, cell connection, and cell adhesion-related proteins. Several treatment options are available, with corneal cross-linking (CXL) being the treatment of choice for early KC. However, postoperative complications have been reported in some CXL patients, mainly caused by corneal epithelial resection. Despite the fact that some novel approaches have helped to reduce some of the initial post-operative issues, their effectiveness seems to be inferior to that of the original CXL. To keep effectiveness while avoiding these negative effects, it is necessary to study the mechanism of CXL in KC treatment at the molecular level. This article provides a review of the molecular mechanism of CXL in the treatment of KC from four aspects: enzyme activity, signal transduction pathway, corneal-related proteins, and other KC-related molecules, further confirming the feasibility of CXL treatment of KC, providing new ideas for improving CXL.
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Affiliation(s)
- Qingyu Yang
- Department of Ophthalmology, 2nd Hospital of Jilin University, Changchun 130041, China.
| | - Shurong Wang
- Department of Ophthalmology, 2nd Hospital of Jilin University, Changchun 130041, China.
| | - Yuxi He
- Department of Ophthalmology, 2nd Hospital of Jilin University, Changchun 130041, China
| | - Yan Zhang
- Department of Ophthalmology, 2nd Hospital of Jilin University, Changchun 130041, China.
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Kapoor D, Shukla D. Neutrophil Extracellular Traps and Their Possible Implications in Ocular Herpes Infection. Pathogens 2023; 12:209. [PMID: 36839481 PMCID: PMC9958879 DOI: 10.3390/pathogens12020209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 02/01/2023] Open
Abstract
Neutrophil extracellular traps (NETs) are net-like structures released from neutrophils. NETs predominantly contain cell-free deoxyribonucleic acid (DNA) decorated with histones and neutrophil granule proteins. Numerous extrinsic and intrinsic stimuli can induce the formation of NETs such as pathogens, cytokines, immune complexes, microcrystals, antibodies, and other physiological stimuli. The mechanism of NETosis induction can either be ROS-dependent or independent based on the catalase producing activity of the pathogen. NADPH is the source of ROS production, which in turn depends on the upregulation of Ca2+ production in the cytoplasm. ROS-independent induction of NETosis is regulated through toll-like receptors (TLRs). Besides capturing and eliminating pathogens, NETs also aggravate the inflammatory response and thus act as a double-edged sword. Currently, there are growing reports of NETosis induction during bacterial and fungal ocular infections leading to different pathologies, but there is no direct report suggesting its role during herpes simplex virus (HSV) infection. There are innumerable independent reports showing that the major effectors of NETosis are also directly affected by HSV infection, and thus, there is a strong possibility that HSV interacts with these facilitators that can either result in virally mediated modulation of NETosis or NETosis-mediated suppression of ocular HSV infection. This review focuses on the mechanism of NETs formation during different ocular pathologies, with its prime focus on highlighting their potential implications during HSV ocular infections and acting as prospective targets for the treatment of ocular diseases.
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Affiliation(s)
- Divya Kapoor
- Department of Ophthalmology and Visual Sciences, College of Medicine, University of Illinois at Chicago, 1905 W. Taylor St., Chicago, IL 60612, USA
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, 835 S. Wolcott, Chicago, IL 60612, USA
| | - Deepak Shukla
- Department of Ophthalmology and Visual Sciences, College of Medicine, University of Illinois at Chicago, 1905 W. Taylor St., Chicago, IL 60612, USA
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, 835 S. Wolcott, Chicago, IL 60612, USA
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Sharma P, Kapoor D, Shukla D. Role of Heparanase and Syndecan-1 in HSV-1 Release from Infected Cells. Viruses 2022; 14:2156. [PMID: 36298711 PMCID: PMC9612286 DOI: 10.3390/v14102156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/25/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022] Open
Abstract
Herpes Simplex Virus 1 (HSV-1) is a neurotropic human virus that belongs to the Alphaherpesvirinae subfamily of Herpesviridae. Establishment of its productive infection and progression of disease pathologies depend largely on successful release of virions from the virus-producing cells. HSV-1 is known to exploit many host factors for its release. Recent studies have shown that heparanase (HPSE) is one such host enzyme that is recruited for this purpose. It is an endoglycosidase that cleaves heparan sulfate (HS) from the surface of infected cells. HS is a virus attachment coreceptor that is commonly found on cell surfaces as HS proteoglycans e.g., syndecan-1 (SDC-1). The current model suggests that HSV-1 during the late stage of infection upregulates HPSE, which in turn enhances viral release by removing the virus-trapping HS moieties. In addition to its role in directly enabling viral release, HPSE accelerates the shedding of HS-containing ectodomains of SDC-1, which enhances HSV-1 release via a similar mechanism by upregulating CREB3 and COPII proteins. This review outlines the role of HPSE and SDC-1 as newly assigned host factors that facilitate HSV-1 release during a lytic infection cycle.
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Affiliation(s)
- Pankaj Sharma
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Divya Kapoor
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Deepak Shukla
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
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Zhou L, Hou W, Wang Y, Lin X, Hu J, Li J, Liu C, Liu H, Li H. An extracellular matrix biosensing mimetic for evaluating cathepsin as a host target for COVID-19. Anal Chim Acta 2022; 1225:340267. [PMID: 36038228 PMCID: PMC9380907 DOI: 10.1016/j.aca.2022.340267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 11/25/2022]
Abstract
To combat the new virus currently ravaging the whole world, every possible anti-virus strategy should be explored. As the main strategy of targeting the virus itself is being frustrated by the rapid mutation of the virus, people are seeking an alternative "host targeting" strategy: neutralizing proteins in the human body that cooperate with the virus. The cathepsin family is such a group of promising host targets, the main biological function of which is to digest the extracellular matrix (ECM) to clear a path for virus spreading. To evaluate the potential of cathepsin as a host target, we have constructed a biosensing interface mimicking the ECM, which can detect cathepsin from 3.3 pM to 33 nM with the limit of detection of 1 pM. Based on our quantitative analysis enabled by this biosensing interface, it is clear that patients with background diseases such as chronic inflammation and tumor, tend to have higher cathepsin activity, confirming the potential of cathepsin to serve as a host target for combating COVID-19 virus.
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Affiliation(s)
- Lei Zhou
- School of Biological Science and Technology, University of Jinan, 336 West Road of Nan, Xinzhuang, 250022, China; Shandong Keyuan Pharmaceutical Co., Ltd, 250022, China.
| | - Wenmin Hou
- School of Biological Science and Technology, University of Jinan, 336 West Road of Nan, Xinzhuang, 250022, China
| | - Ying Wang
- Children's Hospital Affiliated to Shandong University Jinan, Jinan Children's Hospital Jinan, 250002, PR China
| | - Xia Lin
- Children's Hospital Affiliated to Shandong University Jinan, Jinan Children's Hospital Jinan, 250002, PR China
| | - Jianguo Hu
- Department of Food Science and Nutrition, College of Culture and Tourism, University of Jinan, 13#, Shungeng Road, Jinan, 250000, China
| | - Jinlong Li
- Department of Laboratory Medicine, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, 210003, PR China
| | - Chen Liu
- Children's Hospital Affiliated to Shandong University Jinan, Jinan Children's Hospital Jinan, 250002, PR China.
| | - Hongkai Liu
- Department of Food Science and Nutrition, College of Culture and Tourism, University of Jinan, 13#, Shungeng Road, Jinan, 250000, China.
| | - Hao Li
- School of Biological Science and Technology, University of Jinan, 336 West Road of Nan, Xinzhuang, 250022, China.
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Ramos-Martínez IE, Ramos-Martínez E, Segura-Velázquez RÁ, Saavedra-Montañez M, Cervantes-Torres JB, Cerbón M, Papy-Garcia D, Zenteno E, Sánchez-Betancourt JI. Heparan Sulfate and Sialic Acid in Viral Attachment: Two Sides of the Same Coin? Int J Mol Sci 2022; 23:ijms23179842. [PMID: 36077240 PMCID: PMC9456526 DOI: 10.3390/ijms23179842] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 12/11/2022] Open
Abstract
Sialic acids and heparan sulfates make up the outermost part of the cell membrane and the extracellular matrix. Both structures are characterized by being negatively charged, serving as receptors for various pathogens, and are highly expressed in the respiratory and digestive tracts. Numerous viruses use heparan sulfates as receptors to infect cells; in this group are HSV, HPV, and SARS-CoV-2. Other viruses require the cell to express sialic acids, as is the case in influenza A viruses and adenoviruses. This review aims to present, in a general way, the participation of glycoconjugates in viral entry, and therapeutic strategies focused on inhibiting the interaction between the virus and the glycoconjugates. Interestingly, there are few studies that suggest the participation of both glycoconjugates in the viruses addressed here. Considering the biological redundancy that exists between heparan sulfates and sialic acids, we propose that it is important to jointly evaluate and design strategies that contemplate inhibiting the interactions of both glycoconjugates. This approach will allow identifying new receptors and lead to a deeper understanding of interspecies transmission.
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Affiliation(s)
- Ivan Emmanuel Ramos-Martínez
- Departamento de Medicina y Zootecnia de Cerdos, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Edgar Ramos-Martínez
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - René Álvaro Segura-Velázquez
- Unidad de Investigación, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Manuel Saavedra-Montañez
- Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Jacquelynne Brenda Cervantes-Torres
- Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Marco Cerbón
- Unidad de Investigación en Reproducción Humana, Instituto Nacional de Perinatología-Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Dulce Papy-Garcia
- Glycobiology, Cell Growth ant Tissue Repair Research Unit (Gly-CRRET), Université Paris Est Créteil (UPEC), F-94010 Créteil, France
| | - Edgar Zenteno
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - José Ivan Sánchez-Betancourt
- Departamento de Medicina y Zootecnia de Cerdos, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
- Correspondence:
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CREB3 Plays an Important Role in HPSE-Facilitated HSV-1 Release in Human Corneal Epithelial Cells. Viruses 2022; 14:v14061171. [PMID: 35746643 PMCID: PMC9227461 DOI: 10.3390/v14061171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/10/2022] [Accepted: 05/26/2022] [Indexed: 01/16/2023] Open
Abstract
Herpes simplex virus type-1 (HSV-1) exploits several host factors to enhance its replication and release from infected cells. It induces the production of host enzyme heparanase (HPSE) to aid in egress. While the mechanism by which HPSE assists in viral release is well-characterized, other host factors that are recruited along with HPSE for viral release are less well understood. In this study, we identify cyclic-AMP-responsive element-binding protein3 (CREB3) as a key player in HPSE-facilitated HSV-1 egress. When CREB3 is transiently upregulated in human corneal epithelial cells, HSV-1 release from the infected cells is correspondingly enhanced. This activity is linked to HPSE expression such that HPSE-transfected corneal epithelial (HCE) cells more highly express CREB3 than wild-type cells while the cells knocked out for HPSE show very little CREB3 expression. CREB3-transfected HCE cells showed significantly higher export of HPSE upon infection than wild-type cells. Our data suggests that coat protein complex II (COPII), which mediates HPSE trafficking, is also upregulated via a CREB3-dependent pathway during HSV-1 infection. Finally, the co-transfection of CREB3 and HPSE in HCE cells shows the highest viral release compared to either treatment alone, establishing CREB3 as a key player in HPSE-facilitated HSV-1 egress.
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Chang K, Majmudar H, Tandon R, Volin MV, Tiwari V. Induction of Filopodia During Cytomegalovirus Entry Into Human Iris Stromal Cells. Front Microbiol 2022; 13:834927. [PMID: 35450284 PMCID: PMC9018114 DOI: 10.3389/fmicb.2022.834927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 02/07/2022] [Indexed: 12/25/2022] Open
Abstract
Many viruses exploit thin projections of filopodia for cell entry and cell-to-cell spread. Using primary cultures of human iris stromal (HIS) cells derived from human eye donors, we report a significant increase in filopodia formation during human cytomegalovirus (HCMV) infection. Using confocal microscopy, we observed a large number of virions being frequently associated along the filopodia prior to cell infection. Depolymerization of actin filaments resulted in a significant inhibition of HCMV entry into HIS cell. Our results further revealed that the transient expression of HCMV envelope glycoprotein B (gB) triggers the induction of the filopodial system. Since gB is known to bind the diverse chains of heparan sulfate (HS), a comparative study was performed to evaluate the gB-mediated filopodial induction in cells expressing either wild-type HS and/or 3-O sulfated HS (3-OS HS). We found that cells co-expressing HCMV gB together with the 3-O sulfotranseferase-3 (3-OST-3) enzyme had a much higher and robust filopodia induction compared to cells co-expressing gB with wild-type HS. The above results were further verified by pre-treating HIS cells with anti-3-OS HS (G2) peptide and/or heparinase-I before challenging with HCMV infection, which resulted in a significant loss in the filopodial counts as well as decreased viral infectivity. Taken together, our findings highlight that HCMV entry into HIS cells actively modulates the actin cytoskeleton via coordinated actions possibly between gB and the 3-OS HS receptor to influence viral infectivity.
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Affiliation(s)
- Kenneth Chang
- Department of Microbiology and Immunology, College of Graduate Studies, Chicago College of Osteopathic Medicine, and Chicago College of Pharmacy, Midwestern University, Downers Grove, IL, United States
| | - Hardik Majmudar
- Department of Microbiology and Immunology, College of Graduate Studies, Chicago College of Osteopathic Medicine, and Chicago College of Pharmacy, Midwestern University, Downers Grove, IL, United States
| | - Ritesh Tandon
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, MS, United States
| | - Michael V Volin
- Department of Microbiology and Immunology, College of Graduate Studies, Chicago College of Osteopathic Medicine, and Chicago College of Pharmacy, Midwestern University, Downers Grove, IL, United States
| | - Vaibhav Tiwari
- Department of Microbiology and Immunology, College of Graduate Studies, Chicago College of Osteopathic Medicine, and Chicago College of Pharmacy, Midwestern University, Downers Grove, IL, United States
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