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Royston L, Jary A, Berini CA, Mabanga T, Lin J, Pagliuzza A, Chomont N, Litvinov IV, Calmy A, Leducq V, Calvez V, Marcelin AG, Isnard S, Routy JP. Similar Viral and Immune Characteristics of Kaposi Sarcoma in ART-treated People Living With HIV and Older Patients With Classic Kaposi Sarcoma. Open Forum Infect Dis 2024; 11:ofae404. [PMID: 39100526 PMCID: PMC11295207 DOI: 10.1093/ofid/ofae404] [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: 04/08/2024] [Accepted: 07/10/2024] [Indexed: 08/06/2024] Open
Abstract
Background Reemergence of human herpesvirus 8 (HHV-8)-induced Kaposi sarcoma (KS) in people living with HIV (PLWH) despite antiretroviral therapy (ART) poses a clinical challenge because they already have favorable CD4 T-cell numbers and undetectable viral loads. We observed that clinical presentation in PLWH on ART resembled classic KS found in older HIV-uninfected patients and hypothesized that immunosenescence may thus play a role in occurrence of KS on ART. We compared viral and immune factors implicated in the development of KS in ART-treated PLWH (HIV KS) and HIV-uninfected classic KS patients (cKS), compared to controls without KS (HIV Control, cControls respectively). Methods Plasma, peripheral blood mononuclear cell, and skin tissues were obtained from 11 HIV KS and 11 cKS patients and 2 groups of age-matched controls. Results HIV KS participants were younger than cKS (aged 53 vs 75 years). HHV-8 genotypes did not differ between groups. Despite the younger age and a lower CD4/CD8 ratio, activated, exhausted, and senescent T-cell frequencies were similar between HIV KS and cKS. Anti-HHV-8 immunoglobulin G levels were higher and circulating HHV-8 DNA lower in HIV KS compared with cKS. Circulating platelet-derived growth factors AA-BB and granulocyte colony-stimulating factors were higher in HIV KS We observed similar levels of HHV-8 DNA and PD-1 expression in skin lesions from HIV KS and cKS patients. Conclusions Altogether, early immune senescence could be involved in the development of KS in ART-treated PLWH. Higher anti-HHV-8 immunoglobulin G levels could be linked with lower circulating viral load. Such insights should help developing therapeutical strategies to prevent development and treat KS in PLWH on ART.
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Affiliation(s)
- Léna Royston
- Chronic Viral Illness Service, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Infectious Diseases and Immunity in Global Health Program, Montreal, QC, Canada
- Division of Infectious Diseases, Geneva University Hospitals, Geneva, Switzerland
| | - Aude Jary
- Sorbonne Université, INSERM, Institut Pierre Louis d'Épidémiologie et de Santé Publique, Assistance Publique—Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Pitié-Salpêtrière—Charles Foix, Laboratoire de Virologie, Paris, France
| | - Carolina A Berini
- Chronic Viral Illness Service, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Infectious Diseases and Immunity in Global Health Program, Montreal, QC, Canada
| | - Tsoarello Mabanga
- Chronic Viral Illness Service, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Infectious Diseases and Immunity in Global Health Program, Montreal, QC, Canada
| | - John Lin
- Chronic Viral Illness Service, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Infectious Diseases and Immunity in Global Health Program, Montreal, QC, Canada
| | - Amélie Pagliuzza
- Centre de Recherche du CHUM, Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montreal, QC, Canada
| | - Nicolas Chomont
- Centre de Recherche du CHUM, Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montreal, QC, Canada
| | - Ivan V Litvinov
- Research Institute of the McGill University Health Centre, Infectious Diseases and Immunity in Global Health Program, Montreal, QC, Canada
| | - Alexandra Calmy
- HIV Unit, Division of Infectious Diseases, Geneva University Hospitals, Geneva, Switzerland
| | - Valentin Leducq
- Sorbonne Université, INSERM, Institut Pierre Louis d'Épidémiologie et de Santé Publique, Assistance Publique—Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Pitié-Salpêtrière—Charles Foix, Laboratoire de Virologie, Paris, France
| | - Vincent Calvez
- Sorbonne Université, INSERM, Institut Pierre Louis d'Épidémiologie et de Santé Publique, Assistance Publique—Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Pitié-Salpêtrière—Charles Foix, Laboratoire de Virologie, Paris, France
| | - Anne-Geneviève Marcelin
- Sorbonne Université, INSERM, Institut Pierre Louis d'Épidémiologie et de Santé Publique, Assistance Publique—Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Pitié-Salpêtrière—Charles Foix, Laboratoire de Virologie, Paris, France
| | - Stéphane Isnard
- Chronic Viral Illness Service, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Infectious Diseases and Immunity in Global Health Program, Montreal, QC, Canada
- CIHR Canadian HIV Trials Network, Vancouver, BC, Canada
| | - Jean-Pierre Routy
- Chronic Viral Illness Service, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Infectious Diseases and Immunity in Global Health Program, Montreal, QC, Canada
- Division of Hematology, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
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Attal C, Demoury B, Reimbold P, Mensah A, Lescaille G, Rochefort J. Kaposi disease revealing HIV treatment breach: A report of two cases. Clin Case Rep 2024; 12:e9253. [PMID: 39114845 PMCID: PMC11305867 DOI: 10.1002/ccr3.9253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 04/21/2024] [Accepted: 06/25/2024] [Indexed: 08/10/2024] Open
Abstract
Key Clinical Message The purpose of this article is to highlight that oral Kaposi's disease can be indicative of a high viral load of HIV, either in the case of primary infection or therapeutic failure. Abstract We report two cases of Kaposi Disease associated with HIV. The first case was a 30-year-old patient who unaware of her HIV-positive status, and who was diagnosed with AIDS stage because of the biopsy revealed a gingival location of Kaposi disease. The second case was a 34-year-old patient who was referred to our department with a history of palatal lesion and claimed at first having no previous known medical conditions although his overall health condition seemed deteriorated. Our clinical examination was evocative of Kaposi Disease, which was confirmed by an emergency blood assessment and histological examination. Our diagnosis led us to disclose the HIV-positive status of the patient and identify a progression to the AIDS stage, which allowed us to reintroduce the patient in the hospital framework. This case emphasizes the role of the oral surgeon as a key actor thanks to their knowledge of the clinical buccal manifestations of sexually transmitted infections (STI), in an era of resurgence of those conditions in vulnerable key populations.
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Affiliation(s)
- Camille Attal
- Oral and Dental Medicine DepartmentPitié Salpetrière Hospital, Paris Cité UniversityParisFrance
| | - Benjamin Demoury
- Oral and Dental Medicine DepartmentPitié Salpetrière Hospital, Paris Cité UniversityParisFrance
| | - Pierre Reimbold
- Anatomy and Pathology DepartmentSorbonne UniversityParisFrance
| | - Aurore Mensah
- IHP groupLaboratoire D'anatomie Pathologique IHP ParisParisFrance
| | - Géraldine Lescaille
- Oral and Dental Medicine DepartmentPitié Salpetrière Hospital, Paris Cité UniversityParisFrance
| | - Juliette Rochefort
- Oral and Dental Medicine DepartmentPitié Salpetrière Hospital, Paris Cité UniversityParisFrance
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Contreras A, Sánchez SA, Rodríguez-Medina C, Botero JE. The role and impact of viruses on cancer development. Periodontol 2000 2024. [PMID: 38641954 DOI: 10.1111/prd.12566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 02/13/2024] [Accepted: 03/16/2024] [Indexed: 04/21/2024]
Abstract
This review focuses on three major aspects of oncoviruses' role in cancer development. To begin, we discuss their geographic distribution, revealing that seven oncoviruses cause 20% of all human cancers worldwide. Second, we investigate the primary carcinogenic mechanisms, looking at how these oncogenic viruses can induce cellular transformation, angiogenesis, and local and systemic inflammation. Finally, we investigate the possibility of SARS-CoV-2 infection reactivating latent oncoviruses, which could increase the risk of further disease. The development of oncovirus vaccines holds great promise for reducing cancer burden. Many unanswered questions about the host and environmental cofactors that contribute to cancer development and prevention remain, which ongoing research is attempting to address.
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Affiliation(s)
| | - Sandra Amaya Sánchez
- Advanced Periodontology Program, Escuela de Odontología, Universidad del Valle, Cali, Colombia
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Chen TL, Chuang HK, Wu CY. Violaceous Nodules on the Right Leg and Foot. JAMA 2023; 330:2209-2210. [PMID: 37983063 DOI: 10.1001/jama.2023.20118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
A patient with a history of bullous pemphigoid treated with oral prednisolone presented with multiple round, dark brown to violaceous-colored firm nodules on the right leg and 2 nodular masses with hemorrhagic crusts on the right foot. Complete blood cell count and creatinine and liver function test results were normal, and results of HIV antibody testing were negative. What is the diagnosis and what would you do next?
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Affiliation(s)
- Tai-Li Chen
- Department of Dermatology, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, School of Medicine, National Yang Ming Chao Tung University, Taipei, Taiwan
| | - Hao-Kai Chuang
- Faculty of Medicine, School of Medicine, National Yang Ming Chao Tung University, Taipei, Taiwan
- Department of Medical Education, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chen-Yi Wu
- Department of Dermatology, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, School of Medicine, National Yang Ming Chao Tung University, Taipei, Taiwan
- Department of Dermatology, National Yang Ming Chao Tung University, Taipei, Taiwan
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Bouezzedine F, El Baba R, Haidar Ahmad S, Herbein G. Polyploid Giant Cancer Cells Generated from Human Cytomegalovirus-Infected Prostate Epithelial Cells. Cancers (Basel) 2023; 15:4994. [PMID: 37894361 PMCID: PMC10604969 DOI: 10.3390/cancers15204994] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/12/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Prostate cancer is the most commonly diagnosed malignancy and the sixth leading cause of cancer death in men worldwide. Chromosomal instability (CIN) and polyploid giant cancer cells (PGCCs) have been considered predominant hallmarks of cancer. Recent clinical studies have proven the association of CIN, aneuploidy, and PGCCs with poor prognosis of prostate cancer (PCa). Evidence of HCMV transforming potential might indicate that HCMV may be involved in PCa. METHODS Herein, we underline the role of the high-risk HCMV-DB and -BL clinical strains in transforming prostate epithelial cells and assess the molecular and cellular oncogenic processes associated with PCa. RESULTS Oncogenesis parallels a sustained growth of "CMV-Transformed Prostate epithelial cells" or CTP cells that highly express Myc and EZH2, forming soft agar colonies and displaying stemness as well as mesenchymal features, hence promoting EMT as well as PGCCs and a spheroid appearance. CONCLUSIONS HCMV-induced Myc and EZH2 upregulation coupled with stemness and EMT traits in IE1-expressing CTP might highlight the potential role of HCMV in PCa development and encourage the use of anti-EZH2 and anti-HCMV in PCa treatment.
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Affiliation(s)
- Fidaa Bouezzedine
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, University of Franche-Comté, 25000 Besançon, France; (F.B.); (R.E.B.); (S.H.A.)
| | - Ranim El Baba
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, University of Franche-Comté, 25000 Besançon, France; (F.B.); (R.E.B.); (S.H.A.)
| | - Sandy Haidar Ahmad
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, University of Franche-Comté, 25000 Besançon, France; (F.B.); (R.E.B.); (S.H.A.)
| | - Georges Herbein
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, University of Franche-Comté, 25000 Besançon, France; (F.B.); (R.E.B.); (S.H.A.)
- Department of Virology, CHU Besançon, 25030 Besançon, France
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Glover A, Zhang Z, Shannon-Lowe C. Deciphering the roles of myeloid derived suppressor cells in viral oncogenesis. Front Immunol 2023; 14:1161848. [PMID: 37033972 PMCID: PMC10076641 DOI: 10.3389/fimmu.2023.1161848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 03/10/2023] [Indexed: 04/11/2023] Open
Abstract
Myeloid derived suppressor cells (MDSCs) are a heterogenous population of myeloid cells derived from monocyte and granulocyte precursors. They are pathologically expanded in conditions of ongoing inflammation where they function to suppress both innate and adaptive immunity. They are subdivided into three distinct subsets: monocytic (M-) MDSC, polymorphonuclear (or neutrophilic) (PMN-) MDSC and early-stage (e-) MDSC that may exhibit differential function in different pathological scenarios. However, in cancer they are associated with inhibition of the anti-tumour immune response and are universally associated with a poor prognosis. Seven human viruses classified as Group I carcinogenic agents are jointly responsible for nearly one fifth of all human cancers. These viruses represent a large diversity of species, including DNA, RNA and retroviridae. They include the human gammaherpesviruses (Epstein Barr virus (EBV) and Kaposi's Sarcoma-Associated Herpesvirus (KSHV), members of the high-risk human papillomaviruses (HPVs), hepatitis B and C (HBV, HCV), Human T cell leukaemia virus (HTLV-1) and Merkel cell polyomavirus (MCPyV). Each of these viruses encode an array of different oncogenes that perturb numerous cellular pathways that ultimately, over time, lead to cancer. A prerequisite for oncogenesis is therefore establishment of chronic infection whereby the virus persists in the host cells without being eradicated by the antiviral immune response. Although some of the viruses can directly modulate the immune response to enable persistence, a growing body of evidence suggests the immune microenvironment is modulated by expansions of MDSCs, driven by viral persistence and oncogenesis. It is likely these MDSCs play a role in loss of immune recognition and function and it is therefore essential to understand their phenotype and function, particularly given the increasing importance of immunotherapy in the modern arsenal of anti-cancer therapies. This review will discuss the role of MDSCs in viral oncogenesis. In particular we will focus upon the mechanisms thought to drive the MDSC expansions, the subsets expanded and their impact upon the immune microenvironment. Importantly we will explore how MDSCs may modulate current immunotherapies and their impact upon the success of future immune-based therapies.
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Zandi M, Shokri S, Mahmoudvand S, Hosseinzadeh Adli A, Mohammadi R, Haddadi A. Interplay between cellular metabolism and DNA viruses. J Med Virol 2022; 94:5163-5173. [PMID: 35869415 DOI: 10.1002/jmv.28018] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/15/2022] [Accepted: 07/21/2022] [Indexed: 12/15/2022]
Abstract
Viruses as intracellular pathogens take over the host metabolism and reprogram to facilitate optimal virus production. DNA viruses can cause alterations in several metabolic pathways, including aerobic glycolysis also known as the Warburg effect, pentose phosphate pathway activation, and amino acid catabolism such as glutaminolysis, nucleotide biosynthesis, lipid metabolism, and amino acid biosynthesis. The available energy for productive infection can be increased in infected cells via modification of different carbon source utilization. This review discusses the metabolic alterations of the DNA viruses that will be the basis for future novel therapeutic approaches.
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Affiliation(s)
- Milad Zandi
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Somayeh Shokri
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Medical Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Shahab Mahmoudvand
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Medical Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Ahmad Hosseinzadeh Adli
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ramin Mohammadi
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Azita Haddadi
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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El Baba R, Pasquereau S, Haidar Ahmad S, Diab-Assaf M, Herbein G. Oncogenic and Stemness Signatures of the High-Risk HCMV Strains in Breast Cancer Progression. Cancers (Basel) 2022; 14:cancers14174271. [PMID: 36077806 PMCID: PMC9455011 DOI: 10.3390/cancers14174271] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/21/2022] [Accepted: 08/25/2022] [Indexed: 12/18/2022] Open
Abstract
Simple Summary Lately, human cytomegalovirus (HCMV) has been progressively implicated in carcinogenesis alongside its oncomodulatory impact. CMV-Transformed Human mammary epithelial cells (CTH) phenotype might be defined by giant cell cycling, whereby the generation of polyploid giant cancer cells (PGCCs) could expedite the acquisition of malignant phenotypes. Herein, the main study objectives were to assess the transformation potential in vitro and evaluate the obtained cellular phenotype, the genetic and molecular features, and the activation of cellular stemness programs of HCMV strains, B544 and B693, which were previously isolated from triple-negative breast cancer (TNBC) biopsies. The strains’ sensitivity to paclitaxel and ganciclovir combination therapy was evaluated. A unique molecular landscape was unveiled in the tumor microenvironment of TNBC harboring high-risk HCMV. Overall, the explicit oncogenic and stemness signatures highlight HCMV potential in breast cancer progression thus paving the way for targeted therapies and clinical interventions which prolong the overall survival of breast cancer patients. Abstract Background: Human cytomegalovirus (HCMV) oncomodulation, molecular mechanisms, and ability to support polyploid giant cancer cells (PGCCs) generation might underscore its contribution to oncogenesis, especially breast cancers. The heterogeneity of strains can be linked to distinct properties influencing the virus-transforming potential, cancer types induced, and patient’s clinical outcomes. Methods: We evaluated the transforming potential in vitro and assessed the acquired cellular phenotype, genetic and molecular features, and stimulation of stemness of HCMV strains, B544 and B693, isolated from EZH2HighMycHigh triple-negative breast cancer (TNBC) biopsies. Therapeutic response assessment after paclitaxel (PTX) and ganciclovir (GCV) treatment was conducted in addition to the molecular characterization of the tumor microenvironment (TME). Findings: HCMV-B544 and B693 transformed human mammary epithelial cells (HMECs). We detected multinucleated and lipid droplet-filled PGCCs harboring HCMV. Colony formation was detected and Myc was overexpressed in CMV-Transformed-HMECs (CTH cells). CTH-B544 and B693 stimulated stemness and established an epithelial/mesenchymal hybrid state. HCMV-IE1 was detected in CTH long-term cultures indicating a sustained viral replication. Biopsy B693 unveiled a tumor signature predicting a poor prognosis. CTH-B544 cells were shown to be more sensitive to PTX/GCV therapy. Conclusion: The oncogenic and stemness signatures of HCMV strains accentuate the oncogenic potential of HCMV in breast cancer progression thereby leading the way for targeted therapies and innovative clinical interventions that will improve the overall survival of breast cancer patients.
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Affiliation(s)
- Ranim El Baba
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 25030 Besançon, France
| | - Sébastien Pasquereau
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 25030 Besançon, France
| | - Sandy Haidar Ahmad
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 25030 Besançon, France
| | - Mona Diab-Assaf
- Molecular Cancer and Pharmaceutical Biology Laboratory, Lebanese University, Beirut 1500, Lebanon
| | - Georges Herbein
- Pathogens & Inflammation/EPILAB Laboratory, EA 4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 25030 Besançon, France
- Department of Virology, CHU Besançon, 25030 Besançon, France
- Correspondence: ; Tel.: +33-381-665-616; Fax: +33-381-665-695
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Brocca-Cofano E, Sgadari C, Picconi O, Palladino C, Caputo A, Ensoli B. Kaposi’s Sarcoma Lesion Progression in BKV-Tat Transgenic Mice Is Increased by Inflammatory Cytokines and Blocked by Treatment with Anti-Tat Antibodies. Int J Mol Sci 2022; 23:ijms23042081. [PMID: 35216197 PMCID: PMC8874961 DOI: 10.3390/ijms23042081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 02/04/2022] [Accepted: 02/08/2022] [Indexed: 12/10/2022] Open
Abstract
Kaposi’s sarcoma (KS) is an angioproliferative tumor showing an increased frequency and aggressiveness in HIV-infected subjects (AIDS-KS), due to the combined effects of inflammatory cytokines (IC), angiogenic factors, and the HIV-1 Tat protein. While the introduction of effective combined antiretroviral regimens greatly improved AIDS-KS incidence and course, it continues to be an incurable disease and the development of new rational targeted therapies is warranted. We used the BKV/Tat transgenic mouse model to evaluate the effects of IC and anti-Tat antibodies (Abs) treatment on KS-like lesions arising in BKV/Tat mice. We demonstrated here that IC-treatment increases the severity and delays the regression of KS-like lesions. Further, anti-Tat Abs reduced KS-like lesion severity developing in IC-treated mice when anti-Tat Abs were administered at an early-stage of lesion development as compared to more advanced lesions. Early anti-Tat Abs treatment also accelerated KS-like lesion regression and reduced the rate of severe-grade lesions. This effect was more evident in the first weeks after Ab treatment, suggesting that a longer treatment with anti-Tat Abs might be even more effective, particularly if administered just after lesion development. Although preliminary, these results are encouraging, and the approach deserves further studies for the development of anti-Tat Ab-based therapies for AIDS-KS. Clinical studies specifically addressing the effect of anti-Tat antibodies in treating AIDS-KS are not yet available. Nevertheless, the effectiveness of anti-Tat antibodies in controlling HIV/AIDS progression, likely due to the neutralization of extracellular Tat activities, is suggested by several cross-sectional and longitudinal clinical studies, indicating that anti-Tat Ab treatment or Tat-based vaccines may be effective to treat AIDS-KS patients or prevent the tumor in individuals at risk.
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Affiliation(s)
- Egidio Brocca-Cofano
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Fossato di Mortara 64B, 44121 Ferrara, Italy;
- BlueSphereBio, University of Pittsburgh, 350 Technology Drive, Suite 520, Pittsburgh, PA 15219, USA
| | - Cecilia Sgadari
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (C.S.); (O.P.); (C.P.)
| | - Orietta Picconi
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (C.S.); (O.P.); (C.P.)
| | - Clelia Palladino
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (C.S.); (O.P.); (C.P.)
| | - Antonella Caputo
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Fossato di Mortara 64B, 44121 Ferrara, Italy;
- Correspondence: (A.C.); (B.E.)
| | - Barbara Ensoli
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (C.S.); (O.P.); (C.P.)
- Correspondence: (A.C.); (B.E.)
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