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Gauthier C, El Cheikh K, Basile I, Daurat M, Morère E, Garcia M, Maynadier M, Morère A, Gary-Bobo M. Cation-independent mannose 6-phosphate receptor: From roles and functions to targeted therapies. J Control Release 2024; 365:759-772. [PMID: 38086445 DOI: 10.1016/j.jconrel.2023.12.014] [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: 08/26/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023]
Abstract
The cation-independent mannose 6-phosphate receptor (CI-M6PR) is a ubiquitous transmembrane receptor whose main intracellular role is to direct enzymes carrying mannose 6-phosphate moieties to lysosomal compartments. Recently, the small membrane-bound portion of this receptor has appeared to be implicated in numerous pathophysiological processes. This review presents an overview of the main ligand partners and the roles of CI-M6PR in lysosomal storage diseases, neurology, immunology and cancer fields. Moreover, this membrane receptor has already been noted for its strong potential in therapeutic applications thanks to its cellular internalization activity and its ability to address pathogenic factors to lysosomes for degradation. A number of therapeutic delivery approaches using CI-M6PR, in particular with enzymes, antibodies or nanoparticles, are currently being proposed.
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Affiliation(s)
- Corentin Gauthier
- NanoMedSyn, Montpellier, France; IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | | | | | | | - Elodie Morère
- NanoMedSyn, Montpellier, France; IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | | | | | - Alain Morère
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
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Kumari S, Dash PK, Kumari T, Guo ML, Ghosh JK, Buch SJ, Tripathi RK. HIV-1 Nef hijacks both exocytic and endocytic pathways of host intracellular trafficking through differential regulation of Rab GTPases. Biol Cell 2022; 114:276-292. [PMID: 35713972 DOI: 10.1111/boc.202100027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 12/01/2022]
Abstract
HIV-1 Nef regulates several cellular functions in an infected cell which results in viral persistence and AIDS pathogenesis. The currently understood molecular mechanism(s) underlying Nef-dependent cellular function(s) are unable to explain how events are coordinately regulated in the host cell. Intracellular membranous trafficking maintains cellular homeostasis and is regulated by Rab GTPases - a member of the Ras superfamily. In the current study, we tried to decipher the role of Nef on the Rab GTPases-dependent complex and vesicular trafficking. Expression profiling of Rabs in Nef-expressing cells showed that Nef differentially regulates the expression of individual Rabs in a cell-specific manner. Further analysis of Rabs in HIV-1NL4-3 or ΔNef infected cells demonstrated that the Nef protein is responsible for variation in Rabs expression. Using a panel of competitive peptide inhibitors against Nef, we identified the critical domain of HIV-1 Nef involved in modulation of Rabs expression. The molecular function of Nef-mediated upregulation of Rab5 and Rab7 and downregulation of Rab11 increased the transport of SERINC5 from the cell surface to the lysosomal compartment. Moreover, the Nef-dependent increase in Rab27 expression assists exosome release. Reversal of Rabs expression using competitive inhibitors against Nef and manipulation of Rabs expression reduced viral release and infectivity of progeny virions. Overall, this study demonstrates that Nef differentially regulates the expression of Rab proteins in HIV-1 infected cells to hijack the host intracellular trafficking, which augments viral replication and HIV-1 pathogenesis. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Sushila Kumari
- Virus Research and Therapeutics Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
| | - Prasanta K Dash
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Tripti Kumari
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
| | - Ming-Lei Guo
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Jimut Kanti Ghosh
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
| | - Shilpa J Buch
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Raj Kamal Tripathi
- Virus Research and Therapeutics Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
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Role of Apoptosis in HIV Pathogenesis. Adv Virol 2022; 2022:8148119. [PMID: 35462964 PMCID: PMC9023228 DOI: 10.1155/2022/8148119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/08/2022] [Accepted: 03/28/2022] [Indexed: 11/18/2022] Open
Abstract
The apoptotic pathway is an important cell death pathway that contributes to the maintenance of homeostasis in living systems. However, variations in apoptosis have been linked to many diseases such as cancers and chronic infections. The HIV infection has contributed to increase mortality and morbidity worldwide, predominantly through the induction of gradual depletion of CD4+ T cells. The induction and mediation of both the intrinsic and extrinsic apoptotic pathways are crucial in HIV pathogenesis and intracellular survival. Consequently, a deep molecular understanding of how apoptosis is induced and modulated in HIV-mediated CD4+ T cell depletion is paramount, as this can lead to new portals of therapeutic intervention and control.
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Kumari S, Kumar M, Verma R, Ghosh JK, Tripathi RK. HIV-1 Nef-GCC185 interaction regulates assembly of cellular protein complexes at TGN targeting MHC-I downregulation. Life Sci 2019; 229:13-20. [PMID: 30953643 DOI: 10.1016/j.lfs.2019.04.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/27/2019] [Accepted: 04/02/2019] [Indexed: 10/27/2022]
Abstract
AIM HIV-1 Nef downregulates surface MHC-I to protect the infected cells from CTLs-mediated killing. Although MHC-I downregulation has been extensively studied, the Nef-dependent assembly of the multi-protein complex and subsequent pathways activation has not yet been well explored. The present study is aimed for the identification of Nef-mediated sequential recruitment of cellular proteins that constitute the functional multi-protein complex, required for the downregulation of MHC-I. MAIN METHODS Different Cellular protein complexes were identified by co-immunoprecipitation in Nef or NefE4A mutant-expressing Jurkat T, and THP-1 cells followed by exposure to Nef-specific peptides 24 h post infection. The MHC-I downregulation was analyzed by confocal microscopy and flow cytometry. KEY FINDINGS We found the association of Nef with PACS-2, GCC185, PI3K, AP-1, SFK, and MHC-I proteins that probably constitute a functional multi-protein complex. Furthermore, the immunoprecipitations with PACS-2 and GCC185 in the presence or absence of Nef, Nef E4A mutant and Nef with CP-inhibitor divide the functional complex of Nef into Nef-dependent (AP-1 and PI3K) and GCC185-dependent complex (MHC-I and SFK). The molecular mechanisms for activation of cellular pathways have been deciphered on the basis of these interactions that are brought in close proximity through Nef-GCC185 interaction. Knockdown of GCC185 using siRNA in Jurkat T cells showed a direct relationship between the assembly of functional multi-protein complex and MHC-I accumulation at GCC185. SIGNIFICANCE Overall, our study elucidates that GCC185 is a focal point for the assembly of the Nef-mediated multi-protein complex at TGN.
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Affiliation(s)
- Sushila Kumari
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India
| | - Manjeet Kumar
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India
| | - Richa Verma
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India
| | - Jimut Kanti Ghosh
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India
| | - Raj Kamal Tripathi
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India.
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Kumar P, Rawat K, Sharma T, Kumari S, Saxena R, Kumar B, Baghel T, Afshan T, Siddiqi MI, Nazir A, Ghosh JK, Tripathi RK. HIV-1 Nef physically associate with CAMKIIδ - ASK-1 complex to inhibit p38MAPK signalling and apoptosis in infected cells. Life Sci 2019; 224:263-273. [PMID: 30902545 DOI: 10.1016/j.lfs.2019.03.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/13/2019] [Accepted: 03/16/2019] [Indexed: 11/15/2022]
Abstract
Human immunodeficiency type 1 virus accessory protein Nef is a key modulator of AIDS pathogenesis. With no enzymatic activity, Nef regulated functions in host cells largely depends on its ability to form multi-protein complex with the cellular proteins. Here, we identified Calcium (Ca2+)/Calmodulin dependent protein kinase II subunit delta (CAMKIIδ) as novel Nef interacting host protein. Further, we confirmed that Nef mediated [Ca2+]I promote formation of Nef-CAMKIIδ - apoptosis signal-regulating kinase (ASK-1) heterotrimeric complex. The assembly of Nef with CAMKIIδ - ASK-1 inhibits the downstream p38MAPK phosphorylation resulting in abrogation of apoptosis. Further, using competitive peptide inhibitors against Nef binding domains to CAMKIIδ, identified in the present study and ASK-1, individually blocked physical interaction of Nef with CAMKIIδ-ASK-1 complex and restored p38MAPK phosphorylation and apoptosis. Altogether, our study indicates that HIV-Nef modulates cytosolic [Ca2+]I and blocks CAMKIIδ - ASK-1 kinase activity to inhibit apoptosis of infected cells.
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Affiliation(s)
- Pradeep Kumar
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Kavita Rawat
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Tanuj Sharma
- Division of Molecular and Structural Biology, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Sushila Kumari
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Reshu Saxena
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Balawant Kumar
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Tanvi Baghel
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Tayyaba Afshan
- Division of Molecular and Structural Biology, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Mohammad Imran Siddiqi
- Division of Molecular and Structural Biology, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Aamir Nazir
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Jimut Kanti Ghosh
- Division of Molecular and Structural Biology, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India
| | - Raj Kamal Tripathi
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, Council of Scientific & Industrial Research, BS-10/1, Sector-10 Jankipuram Extension, Uttar Pradesh, India..
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Saxena R, Vekariya U, Tripathi R. HIV-1 Nef and host proteome analysis: Current perspective. Life Sci 2019; 219:322-328. [PMID: 30664855 DOI: 10.1016/j.lfs.2019.01.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/17/2019] [Accepted: 01/17/2019] [Indexed: 01/23/2023]
Abstract
Proteome represents the set of proteins being produced by an organism at a given time. Comparative proteomic profiling of a healthy and diseased state is likely to reflect the dynamics of a disease process. Proteomic techniques are widely used to discover novel biomarkers and decipher mechanisms of HIV-1 pathogenesis. Proteomics is thus emerging as an indispensable tool of monitoring a disease process and intense interactions between HIV-1 and host. Nef is known to regulate various functions in the host to establish the state of infection. This review gives an overview of all proteomic studies done on HIV infection and HIV associated disorders including recent developments in Nef-host proteomic profiling. Here, we propose an emphasis on Nef based proteomic studies. We also discuss the future prospects and the technical and biological challenges involved in proteomic studies. Future studies with Nef related proteomic investigation are likely to identify more targets for diagnosis and therapy.
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Affiliation(s)
- Reshu Saxena
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India
| | - Umeshkumar Vekariya
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India
| | - Rajkamal Tripathi
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow 226031, U.P., India.
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Vekariya U, Saxena R, Singh P, Rawat K, Kumar B, Kumari S, Agnihotri SK, Kaur S, Sachan R, Nazir A, Bhadauria S, Sachdev M, Tripathi RK. HIV-1 Nef-POTEE; A novel interaction modulates macrophage dissemination via mTORC2 signaling pathway. Life Sci 2018; 214:158-166. [PMID: 30391463 DOI: 10.1016/j.lfs.2018.10.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 10/29/2018] [Indexed: 12/16/2022]
Abstract
AIMS Human immunodeficiency virus -1 [HIV-1] Nef, localizes in different cellular compartments and modulates several cellular pathways. Nef promotes virus pathogenicity through alteration in cell surface receptor expression, apoptosis, protein trafficking etc. Nef regulates viral pathogenesis through interaction with different host proteins. Thus, molecular mechanisms of pathogenesis could be deciphered by identifying novel Nef interacting proteins. MAIN METHODS HIV-1 Nef interacting proteins were identified by pull down assay and MALDI-TOF analysis. The interaction was further validated through mammalian two hybrid assay. Functional role of this interaction was identified by immunoprecipitation assay, cell invasion and cell migration studies. Fold Change in mRNA levels of CD163, CD206, CCL17 and CCL18 was analyzed using qPCR. KEY FINDINGS In current study, C. elegans protein ACT4C and its human homolog POTEE was identified to be interacting with Nef. This interaction activates mTORC2 complex, which in-turn activates AKT and PKC-α. The activation of mTORC2 complex was found to be initiated by the interaction of Nef, mTORC2, Rictor to POTEE. The cellular phenotype and functions affected by Nef-POTEE interaction resulted in significant increase in cell invasion and migration of macrophages (MΦ). SIGNIFICANCE MΦ is primary target of HIV-1 infection where HIV-1 replicates and polarizes immunosuppressive M2 phenotype. Combine effect of M2 phenotype and Viral-host protein interactions compromise the MΦ associated physiological functions. Infected MΦ dissemination into other system also leads to HIV-1 induced malignancies. Therefore, targeting POTEE-Nef interaction can lead to formulating better therapeutic strategy against HIV-1.
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Affiliation(s)
- Umeshkumar Vekariya
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Reshu Saxena
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Poonam Singh
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Kavita Rawat
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Balawant Kumar
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Sushila Kumari
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | | | - Supinder Kaur
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Rekha Sachan
- Department of Obstetrics & Gynecology, King George Medical University, Lucknow, UP, India
| | - Aamir Nazir
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Smrati Bhadauria
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Monika Sachdev
- Endocrinology Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - Raj Kamal Tripathi
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute, Lucknow, UP, India.
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