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Osetrina DA, Kusova AM, Bikmullin AG, Klochkova EA, Yulmetov AR, Semenova EA, Mukhametzyanov TA, Usachev KS, Klochkov VV, Blokhin DS. Extent of N-Terminus Folding of Semenogelin 1 Cleavage Product Determines Tendency to Amyloid Formation. Int J Mol Sci 2023; 24:ijms24108949. [PMID: 37240295 DOI: 10.3390/ijms24108949] [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: 03/23/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
It is known that four peptide fragments of predominant protein in human semen Semenogelin 1 (SEM1) (SEM1(86-107), SEM1(68-107), SEM1(49-107) and SEM1(45-107)) are involved in fertilization and amyloid formation processes. In this work, the structure and dynamic behavior of SEM1(45-107) and SEM1(49-107) peptides and their N-domains were described. According to ThT fluorescence spectroscopy data, it was shown that the amyloid formation of SEM1(45-107) starts immediately after purification, which is not observed for SEM1(49-107). Seeing that the peptide amino acid sequence of SEM1(45-107) differs from SEM1(49-107) only by the presence of four additional amino acid residues in the N domain, these domains of both peptides were obtained via solid-phase synthesis and the difference in their dynamics and structure was investigated. SEM1(45-67) and SEM1(49-67) showed no principal difference in dynamic behavior in water solution. Furthermore, we obtained mostly disordered structures of SEM1(45-67) and SEM1(49-67). However, SEM1(45-67) contains a helix (E58-K60) and helix-like (S49-Q51) fragments. These helical fragments may rearrange into β-strands during amyloid formation process. Thus, the difference in full-length peptides' (SEM1(45-107) and SEM1(49-107)) amyloid-forming behavior may be explained by the presence of a structured helix at the SEM1(45-107) N-terminus, which contributes to an increased rate of amyloid formation.
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Affiliation(s)
- Daria A Osetrina
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
| | - Aleksandra M Kusova
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan 420111, Russia
| | - Aydar G Bikmullin
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
- Laboratory of Structural Biology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420021, Russia
| | - Evelina A Klochkova
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
- Laboratory of Structural Biology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420021, Russia
| | - Aydar R Yulmetov
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
| | - Evgenia A Semenova
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
| | - Timur A Mukhametzyanov
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
| | - Konstantin S Usachev
- Laboratory of Structural Biology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420021, Russia
- Laboratory for Structural Analysis of Biomacromolecules, Federal Research Center "Kazan Scientific Center of Russian Academy of Sciences", Kazan 420111, Russia
| | - Vladimir V Klochkov
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
| | - Dmitriy S Blokhin
- NMR Laboratory, Medical Physics Department, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 18, Kazan 420008, Russia
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Du P, Liu A, Jiao Y, Liu C, Jiang T, Zhu W, Zhu Y, Wu H, Sun L. HIV RNA and proviral HIV DNA can be detected in semen after 6 months of antiretroviral therapy although HIV RNA is undetectable in blood. Microbiol Immunol 2017; 60:187-95. [PMID: 26833915 DOI: 10.1111/1348-0421.12361] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/20/2016] [Accepted: 01/27/2016] [Indexed: 11/30/2022]
Abstract
The risk of sexual transmission of HIV is strongly correlated with amounts of genital HIV RNA. Few studies have reported amounts of HIV RNA and HIV DNA in semen in HIV-infected Chinese patients undergoing antiviral treatment (ART). In this observational study, the amounts of HIV RNA and HIV DNA in semen were assessed after six months of ART in HIV-infected Chinese individuals, when HIV RNA was undetectable in blood . This study included 19 HIV-infected Chinese men undergoing ART for six months. Amounts of HIV in paired semen and blood samples were assessed using real-time PCR. The C2-V5 region of the HIV envelope (env) genes was cloned and sequenced and genotype and co-receptor usage predicted based on the sequence. It was found that HIV RNA was undetectable in the plasma of most patients (17/19), whereas HIV RNA could be detected in the semen of most patients (16/19). HIV DNA could be detected in both semen and blood. Genetic diversity of HIV between the seminal and blood compartments was identified. Thus, amounts of HIV RNA and HIV DNA remain high in semen of HIV-infected Chinese patients after six months of ART treatment, even when HIV RNA was undetectable in blood.
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Affiliation(s)
| | | | - Yanmei Jiao
- Key Laboratory of Major Diseases in Children by Ministry of Education, Beijing Children's Hospital, Capital Medical University.,Laboratory of Immunology, Beijing Pediatric Research Institute, Beijing Children's Hospital Affiliated to Capital Medical University
| | | | | | - Weijun Zhu
- MOH Key Laboratory of Systems Biology of Pathogens and AIDS Research Center, Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Human Prostatic Acid Phosphatase in Prostate Carcinogenesis. Prostate Cancer 2013. [DOI: 10.1007/978-1-4614-6828-8_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Affiliation(s)
- Shailendra K Saxena
- CSIR-Centre for Cellular & Molecular Biology, Uppal Road, Hyderabad 500007 (AP), India
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Sattin S, Daghetti A, Thépaut M, Berzi A, Sánchez-Navarro M, Tabarani G, Rojo J, Fieschi F, Clerici M, Bernardi A. Inhibition of DC-SIGN-mediated HIV infection by a linear trimannoside mimic in a tetravalent presentation. ACS Chem Biol 2010; 5:301-12. [PMID: 20085340 DOI: 10.1021/cb900216e] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
HIV infection is pandemic in humans and is responsible for millions of deaths every year. The discovery of new cellular targets that can be used to prevent the infection process represents a new opportunity for developing more effective antiviral drugs. In this context, dendritic cell-specific ICAM-3 grabbing non-integrin (DC-SIGN), a lectin expressed at the surface of immature dendritic cells and involved in the initial stages of HIV infection, is a promising therapeutic target. Herein we show the ability of a new tetravalent dendron containing four copies of a linear trimannoside mimic to inhibit the trans HIV infection process of CD4+ T lymphocytes at low micromolar range. This compound presents a high solubility in physiological media, a neglectable cytotoxicity, and a long-lasting effect and is based on carbohydrate-mimic units. Notably, the HIV antiviral activity is independent of viral tropism (X4 or R5). The formulation of this compound as a gel could allow its use as topical microbicide.
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Affiliation(s)
- Sara Sattin
- Dipartimento di Chimica Organica e Industriale and CISI, Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
| | - Anna Daghetti
- Dipartimento di Chimica Organica e Industriale and CISI, Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
| | - Michel Thépaut
- Laboratoire des protéines membranaires, CEA, DSV, Institut de Biologie Structurale, 41 rue Jules Horowitz, 38027 Grenoble, France
- CNRS, UMR 5075, 38000 Grenoble, France
| | - Angela Berzi
- Dipartimento di Scienze Precliniche, Università degli Studi di Milano, via GB Grassi 74, 20157 Milano, Italy
| | - Macarena Sánchez-Navarro
- Grupo de Carbohidratos, Instituto de Investigaciones Químicas, CSIC−Universidad de Sevilla, Av. Americo Vespucio 49, 41092 Seville, Spain
| | - Georges Tabarani
- Laboratoire des protéines membranaires, CEA, DSV, Institut de Biologie Structurale, 41 rue Jules Horowitz, 38027 Grenoble, France
- Université Joseph Fourier, 38000 Grenoble, France
| | - Javier Rojo
- Grupo de Carbohidratos, Instituto de Investigaciones Químicas, CSIC−Universidad de Sevilla, Av. Americo Vespucio 49, 41092 Seville, Spain
| | - Franck Fieschi
- Laboratoire des protéines membranaires, CEA, DSV, Institut de Biologie Structurale, 41 rue Jules Horowitz, 38027 Grenoble, France
- Université Joseph Fourier, 38000 Grenoble, France
| | - Mario Clerici
- Dipartimento di Scienze e Tecnologie Biomediche, Università degli Studi di Milano, via Flli Cervi 93, 20090 Segrate, Italy
- Don C. Gnocchi ONLUS Foundation IRCCS, Via Capecelatro 66, 20148 Milano, Italy
| | - Anna Bernardi
- Dipartimento di Chimica Organica e Industriale and CISI, Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
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Abstract
Although the worldwide incidence of HIV infection is high, the retrovirus displays a surprisingly low infectivity in vitro. As a potential explanation for this discrepancy, Münch et al. (2007) now identify and characterize a factor found in human semen that under certain conditions can enhance HIV infectivity by more than 100,000-fold.
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Abstract
Highly active antiretroviral therapy (HAART), although effective in ameliorating the quality of life of HIV-1-infected individuals and their survival, has not been able to eradicate HIV-1. In fact, when HAART is interrupted, HIV-1 plasma viral load rebounds from viral reservoirs such as resting CD4+ T lymphocytes, monocytes and macrophages, remaining a major obstacle in attempting HIV eradication. Different therapeutic strategies have been attempted, such as structured treatment interruption (STI), immunotherapy (interleukin [IL]-2 and anti-CD3 antibodies [e.g., OKT3]), to try to stimulate HIV-1 out of latency along with antiretroviral intensification therapy. IL-7, a pleiotropic cytokine, bears diverse immune properties and plays a major role in T cell homeostasis. Moreover, IL-7 has recently been investigated as a possible immune adjuvant as well as a viral strain-specific inducer of HIV-1 replication. In fact, IL-7 was shown not only to be more effective than IL-2 in stimulating HIV-1 replication from resting CD4+ T lymphocytes ex vivo, but also to selectively induce a specific HIV-1 viral strain as compared with IL-2, suggesting the potential need for different viral inducers if complete eradication is to be achieved. In this present review, different immunological and virological properties of IL-7 are discussed, along with the possibility of its use as part of a combined antiretroviral-immune rationally based HIV-1 eradication approach.
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Affiliation(s)
- Giuseppe Nunnari
- Center for Human Virology and Biodefense, Division of Infectious Diseases and Environmental Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.
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Ma G, Greenwell-Wild T, Lei K, Jin W, Swisher J, Hardegen N, Wild CT, Wahl SM. Secretory leukocyte protease inhibitor binds to annexin II, a cofactor for macrophage HIV-1 infection. ACTA ACUST UNITED AC 2005; 200:1337-46. [PMID: 15545357 PMCID: PMC2211913 DOI: 10.1084/jem.20041115] [Citation(s) in RCA: 175] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The distribution of secretory leukocyte protease inhibitor (SLPI) at entry portals indicates its involvement in defending the host from pathogens, consistent with the ability of SLPI to inhibit human immunodeficiency virus (HIV)-1 infection by an unknown mechanism. We now demonstrate that SLPI binds to the membrane of human macrophages through the phospholipid-binding protein, annexin II. Based on the recent identification of human cell membrane phosphatidylserine (PS) in the outer coat of HIV-1, we define a novel role for annexin II, a PS-binding moiety, as a cellular cofactor supporting macrophage HIV-1 infection. Moreover, this HIV-1 PS interaction with annexin II can be disrupted by SLPI or other annexin II–specific inhibitors. The PS–annexin II connection may represent a new target to prevent HIV-1 infection.
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Affiliation(s)
- Ge Ma
- Oral Infection and Immunity Branch, NIDCR, NIH, 30 Convent Dr., MSC4352, Building 30, Room 320, Bethesda, MD 20892, USA
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