1
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Kremer A, Ryaykenen T, Haraszti RA. Systematic optimization of siRNA productive uptake into resting and activated T cells ex vivo. Biomed Pharmacother 2024; 172:116285. [PMID: 38382331 DOI: 10.1016/j.biopha.2024.116285] [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: 11/24/2023] [Revised: 02/09/2024] [Accepted: 02/17/2024] [Indexed: 02/23/2024] Open
Abstract
RNA-based medicines are ideally suited for precise modulation of T cell phenotypes in anti-cancer immunity, in autoimmune diseases and for ex vivo modulation of T-cell-based therapies. Therefore, understanding productive siRNA uptake to T cells is of particular importance. Most studies used unmodified siRNAs or commercially available siRNAs with undisclosed chemical modification patterns to show functionality in T cells. Despite being an active field of research, robust siRNA delivery to T cells still represents a formidable challenge. Therefore, a systematic approach is needed to further optimize and understand productive siRNA uptake pathways to T cells. Here, we compared conjugate-mediated and nanoparticle-mediated delivery of siRNAs to T cells in the context of fully chemically modified RNA constructs. We showed that lipid-conjugate-mediated delivery outperforms lipid-nanoparticle-mediated and extracellular-vesicle-mediated delivery in activated T cells ex vivo. Yet, ex vivo manipulation of T cells without the need of activation is of great therapeutic interest for CAR-T, engineered TCR-T and allogeneic donor lymphocyte applications. We are first to report productive siRNA uptake into resting T cells using lipid-conjugate-mediated delivery. Interestingly, we observed strong dependence of silencing activity on lipid-conjugate-identity in resting T cells but not in activated T cells. This phenomenon is consistent with our early uptake kinetics data. Lipid-conjugates also enabled delivery of siRNA to all mononuclear immune cell types, including both lymphoid and myeloid lineages. These findings are expected to be broadly applicable for ex vivo modulation of immune cell therapies.
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Affiliation(s)
- A Kremer
- Department of Internal Medicine II, Hematology, Oncology, Clinical Immunology and Rheumatology, University Hospital Tuebingen, Germany; Gene and RNA Therapy Center (GRTC), Faculty of Medicine, University Tuebingen, Germany
| | - T Ryaykenen
- Department of Internal Medicine II, Hematology, Oncology, Clinical Immunology and Rheumatology, University Hospital Tuebingen, Germany; Gene and RNA Therapy Center (GRTC), Faculty of Medicine, University Tuebingen, Germany
| | - R A Haraszti
- Department of Internal Medicine II, Hematology, Oncology, Clinical Immunology and Rheumatology, University Hospital Tuebingen, Germany; Gene and RNA Therapy Center (GRTC), Faculty of Medicine, University Tuebingen, Germany.
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2
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Zöphel S, Schäfer G, Nazarieh M, Konetzki V, Hoxha C, Meese E, Hoth M, Helms V, Hamed M, Schwarz EC. Identification of molecular candidates which regulate calcium-dependent CD8 + T-cell cytotoxicity. Mol Immunol 2023; 157:202-213. [PMID: 37075611 DOI: 10.1016/j.molimm.2023.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 01/10/2023] [Accepted: 04/02/2023] [Indexed: 04/21/2023]
Abstract
Cytotoxic CD8+ T lymphocytes (CTL) eliminate infected cells or transformed tumor cells by releasing perforin-containing cytotoxic granules at the immunological synapse. The secretion of such granules depends on Ca2+-influx through store operated Ca2+ channels, formed by STIM (stromal interaction molecule)-activated Orai proteins. Whereas molecular mechanisms of the secretion machinery are well understood, much less is known about the molecular machinery that regulates the efficiency of Ca2+-dependent target cell killing. CTL killing efficiency is of high interest considering the number of studies on CD8+ T lymphocytes modified for clinical use. Here, we isolated total RNA from primary human cells: natural killer (NK) cells, non-stimulated CD8+ T-cells, and from Staphylococcus aureus enterotoxin A (SEA) stimulated CD8+ T-cells (SEA-CTL) and conducted whole genome expression profiling by microarray experiments. Based on differential expression analysis of the transcriptome data and analysis of master regulator genes, we identified 31 candidates which potentially regulate Ca2+-homeostasis in CTL. To investigate a putative function of these candidates in CTL cytotoxicity, we transfected either SEA-stimulated CTL (SEA-CTL) or antigen specific CD8+ T-cell clones (CTL-MART-1) with siRNAs specific against the identified candidates and analyzed the killing capacity using a real-time killing assay. In addition, we complemented the analysis by studying the effect of inhibitory substances acting on the candidate proteins if available. Finally, to unmask their involvement in Ca2+ dependent cytotoxicity, candidates were also analyzed under Ca2+-limiting conditions. Overall, we identified four hits, CCR5 (C-C chemokine receptor type five), KCNN4 (potassium calcium-activated channel subfamily N), RCAN3 (regulator of calcineurin) and BCL (B-cell lymphoma) 2 which clearly affect the efficiency of Ca2+ dependent cytotoxicity in CTL-MART-1 cells, CCR5, BCL2, and KCNN4 in a positive manner, and RCAN3 in a negative way.
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Affiliation(s)
- Sylvia Zöphel
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany
| | - Gertrud Schäfer
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany
| | - Maryam Nazarieh
- Center for Bioinformatics, Saarland Informatics Campus, Saarland University, 66041 Saarbrücken, Germany
| | - Verena Konetzki
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany
| | - Cora Hoxha
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany
| | - Eckart Meese
- Human Genetics, School of Medicine, Saarland University, Building 60, 66421 Homburg, Germany
| | - Markus Hoth
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany
| | - Volkhard Helms
- Center for Bioinformatics, Saarland Informatics Campus, Saarland University, 66041 Saarbrücken, Germany
| | - Mohamed Hamed
- Institute for Biostatistics and Informatics in Medicine and Ageing Research, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Eva C Schwarz
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
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Schaible P, Bethge W, Lengerke C, Haraszti RA. RNA Therapeutics for Improving CAR T-cell Safety and Efficacy. Cancer Res 2023; 83:354-362. [PMID: 36512627 PMCID: PMC7614194 DOI: 10.1158/0008-5472.can-22-2155] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 11/02/2022] [Accepted: 12/09/2022] [Indexed: 12/15/2022]
Abstract
Autologous chimeric antigen receptor (CAR) T cells have recently emerged as potent tools in the fight against cancer, with promising therapeutic efficacy against hematological malignancies. However, several limitations hamper their widespread clinical use, including availability of target antigen, severe toxic effects, primary and secondary resistance, heterogeneous quality of autologous T cells, variable persistence, and low activity against solid tumors. Development of allogeneic off-the-shelf CAR T cells could help address some of these limitations but is impeded by alloimmunity with either rejection and limited expansion of allo-CAR T cells or CAR T cells versus host reactions. RNA therapeutics, such as small interfering RNAs, microRNAs, and antisense oligonucleotides, are able to silence transcripts in a sequence-specific and proliferation-sensitive way, which may offer a way to overcome some of the challenges facing CAR T-cell development and clinical utility. Here, we review how different RNA therapeutics or a combination of RNA therapeutics and genetic engineering could be harnessed to improve the safety and efficacy of autologous and allogeneic CAR T-cell therapy.
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Affiliation(s)
- Philipp Schaible
- Department of Internal Medicine II, Hematology, Oncology, Clinical Immunology and Rheumatology, University Hospital Tübingen, Tübingen, Germany
| | - Wolfgang Bethge
- Department of Internal Medicine II, Hematology, Oncology, Clinical Immunology and Rheumatology, University Hospital Tübingen, Tübingen, Germany
| | - Claudia Lengerke
- Department of Internal Medicine II, Hematology, Oncology, Clinical Immunology and Rheumatology, University Hospital Tübingen, Tübingen, Germany
| | - Reka Agnes Haraszti
- Department of Internal Medicine II, Hematology, Oncology, Clinical Immunology and Rheumatology, University Hospital Tübingen, Tübingen, Germany
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4
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Bressy C, Zemani A, Goyal S, Jishkariani D, Lee CN, Chen YH. Inhibition of c-Rel expression in myeloid and lymphoid cells with distearoyl -phosphatidylserine (DSPS) liposomal nanoparticles encapsulating therapeutic siRNA. PLoS One 2022; 17:e0276905. [PMID: 36520934 PMCID: PMC9754606 DOI: 10.1371/journal.pone.0276905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 10/14/2022] [Indexed: 12/23/2022] Open
Abstract
c-Rel, a member of the nuclear factor kappa B (NF-κB) family, is preferentially expressed by immune cells and is known to regulate inflammation, autoimmune diseases and cancer. However, there is a lack of therapeutic intervention to specifically inhibit c-Rel in immune cells. Recent success with Pfizer and Moderna mRNA lipid-encapsulated vaccines as well as FDA approved medicines based on siRNA prompted us to test a lipid nanoparticle-based strategy to silence c-Rel in immune cells. Specifically, we encapsulated c-Rel-targeting siRNA into distearoyl-phosphatidylserine (DSPS)-containing nanoparticles. DSPS is a saturated phospholipid that serves as the "eat-me" signal for professional phagocytes such as macrophages and neutrophils of the immune system. We demonstrated here that incorporation of DSPS in liposome nanoparticles (LNP) improved their uptake by immune cells. LNP containing high concentrations of DSPS were highly effective to transfect not only macrophages and neutrophils, but also lymphocytes, with limited toxicity to cells. However, LNP containing low concentrations of DSPS were more effective to transfect myeloid cells than lymphoid cells. Importantly, DSPS-LNP loaded with a c-Rel siRNA were highly effective to inhibit c-Rel expression in several professional phagocytes tested, which lasted for several days. Taken together, our results suggest that DSPS-LNP armed with c-Rel siRNA could be exploited to target immune cells to limit the development of inflammatory diseases or cancer caused by c-Rel upregulation. In addition, this newly developed DSPS-LNP system may be further tested to encapsulate and deliver other small molecule drugs to immune cells, especially macrophages, neutrophils, and lymphocytes for the treatment of diseases.
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Affiliation(s)
- Christian Bressy
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
- * E-mail: (CB); (YHC)
| | - Ali Zemani
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Shreya Goyal
- Department of Biological Sciences, University of North Carolina, Charlotte, North Carolina, United States of America
| | - Davit Jishkariani
- Chemical and Nanoparticle Synthesis Core (CNSC), The University of Pennsylvania, Philadelphia, PA, United States of America
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Chin Nien Lee
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Youhai H. Chen
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
- Faculty of Pharmaceutical Sciences, CAS Shenzhen Institute of Advanced Technology, Shenzhen, China
- * E-mail: (CB); (YHC)
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5
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de Brito e Cunha D, Frederico ABT, Azamor T, Melgaço JG, da Costa Neves PC, Bom APDA, Tilli TM, Missailidis S. Biotechnological Evolution of siRNA Molecules: From Bench Tool to the Refined Drug. Pharmaceuticals (Basel) 2022; 15:ph15050575. [PMID: 35631401 PMCID: PMC9146980 DOI: 10.3390/ph15050575] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/08/2022] [Accepted: 04/11/2022] [Indexed: 12/13/2022] Open
Abstract
The depth and versatility of siRNA technologies enable their use in disease targets that are undruggable by small molecules or that seek to achieve a refined turn-off of the genes for any therapeutic area. Major extracellular barriers are enzymatic degradation of siRNAs by serum endonucleases and RNAases, renal clearance of the siRNA delivery system, the impermeability of biological membranes for siRNA, activation of the immune system, plasma protein sequestration, and capillary endothelium crossing. To overcome the intrinsic difficulties of the use of siRNA molecules, therapeutic applications require nanometric delivery carriers aiming to protect double-strands and deliver molecules to target cells. This review discusses the history of siRNAs, siRNA design, and delivery strategies, with a focus on progress made regarding siRNA molecules in clinical trials and how siRNA has become a valuable asset for biopharmaceutical companies.
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Affiliation(s)
- Danielle de Brito e Cunha
- Immunological Technology Laboratory, Institute of Technology in Immunobiologicals, Bio-Manguinhos, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil; (D.d.B.e.C.); (A.B.T.F.); (T.A.); (J.G.M.); (P.C.d.C.N.); (A.P.D.A.B.); (S.M.)
| | - Ana Beatriz Teixeira Frederico
- Immunological Technology Laboratory, Institute of Technology in Immunobiologicals, Bio-Manguinhos, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil; (D.d.B.e.C.); (A.B.T.F.); (T.A.); (J.G.M.); (P.C.d.C.N.); (A.P.D.A.B.); (S.M.)
| | - Tamiris Azamor
- Immunological Technology Laboratory, Institute of Technology in Immunobiologicals, Bio-Manguinhos, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil; (D.d.B.e.C.); (A.B.T.F.); (T.A.); (J.G.M.); (P.C.d.C.N.); (A.P.D.A.B.); (S.M.)
| | - Juliana Gil Melgaço
- Immunological Technology Laboratory, Institute of Technology in Immunobiologicals, Bio-Manguinhos, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil; (D.d.B.e.C.); (A.B.T.F.); (T.A.); (J.G.M.); (P.C.d.C.N.); (A.P.D.A.B.); (S.M.)
| | - Patricia Cristina da Costa Neves
- Immunological Technology Laboratory, Institute of Technology in Immunobiologicals, Bio-Manguinhos, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil; (D.d.B.e.C.); (A.B.T.F.); (T.A.); (J.G.M.); (P.C.d.C.N.); (A.P.D.A.B.); (S.M.)
| | - Ana Paula Dinis Ano Bom
- Immunological Technology Laboratory, Institute of Technology in Immunobiologicals, Bio-Manguinhos, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil; (D.d.B.e.C.); (A.B.T.F.); (T.A.); (J.G.M.); (P.C.d.C.N.); (A.P.D.A.B.); (S.M.)
| | - Tatiana Martins Tilli
- Translational Oncology Platform, Center for Technological Development in Health, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil
- Laboratory of Cardiovascular Research, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil
- Correspondence: ; Tel.: +55-21-2562-1312
| | - Sotiris Missailidis
- Immunological Technology Laboratory, Institute of Technology in Immunobiologicals, Bio-Manguinhos, Oswaldo Cruz Foundation, Fiocruz, Rio de Janeiro 21040-900, Brazil; (D.d.B.e.C.); (A.B.T.F.); (T.A.); (J.G.M.); (P.C.d.C.N.); (A.P.D.A.B.); (S.M.)
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6
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Van Hoeck J, Braeckmans K, De Smedt SC, Raemdonck K. Non-viral siRNA delivery to T cells: Challenges and opportunities in cancer immunotherapy. Biomaterials 2022; 286:121510. [DOI: 10.1016/j.biomaterials.2022.121510] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 03/17/2022] [Accepted: 04/01/2022] [Indexed: 12/12/2022]
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7
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Ohyagi M, Nagata T, Ihara K, Yoshida-Tanaka K, Nishi R, Miyata H, Abe A, Mabuchi Y, Akazawa C, Yokota T. DNA/RNA heteroduplex oligonucleotide technology for regulating lymphocytes in vivo. Nat Commun 2021; 12:7344. [PMID: 34937876 PMCID: PMC8695577 DOI: 10.1038/s41467-021-26902-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 10/19/2021] [Indexed: 11/30/2022] Open
Abstract
Manipulating lymphocyte functions with gene silencing approaches is promising for treating autoimmunity, inflammation, and cancer. Although oligonucleotide therapy has been proven to be successful in treating several conditions, efficient in vivo delivery of oligonucleotide to lymphocyte populations remains a challenge. Here, we demonstrate that intravenous injection of a heteroduplex oligonucleotide (HDO), comprised of an antisense oligonucleotide (ASO) and its complementary RNA conjugated to α-tocopherol, silences lymphocyte endogenous gene expression with higher potency, efficacy, and longer retention time than ASOs. Importantly, reduction of Itga4 by HDO ameliorates symptoms in both adoptive transfer and active experimental autoimmune encephalomyelitis models. Our findings reveal the advantages of HDO with enhanced gene knockdown effect and different delivery mechanisms compared with ASO. Thus, regulation of lymphocyte functions by HDO is a potential therapeutic option for immune-mediated diseases.
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MESH Headings
- Administration, Intravenous
- Adoptive Transfer
- Animals
- Demyelinating Diseases/genetics
- Demyelinating Diseases/immunology
- Demyelinating Diseases/pathology
- Encephalomyelitis, Autoimmune, Experimental/genetics
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Endocytosis/drug effects
- Female
- Gene Expression Regulation
- Gene Silencing
- Graft vs Host Disease/genetics
- Graft vs Host Disease/immunology
- Humans
- Integrin alpha4/genetics
- Integrin alpha4/metabolism
- Jurkat Cells
- Lymphocytes/metabolism
- Male
- Mice, Inbred C57BL
- Nucleic Acid Heteroduplexes/administration & dosage
- Nucleic Acid Heteroduplexes/metabolism
- Nucleic Acid Heteroduplexes/pharmacokinetics
- Nucleic Acid Heteroduplexes/pharmacology
- Oligonucleotides/administration & dosage
- Oligonucleotides/metabolism
- Oligonucleotides/pharmacokinetics
- Oligonucleotides/pharmacology
- RNA/metabolism
- RNA, Long Noncoding/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Spinal Cord/pathology
- Tissue Distribution/drug effects
- Mice
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Affiliation(s)
- Masaki Ohyagi
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tetsuya Nagata
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Kensuke Ihara
- Department of Bio-informational Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kie Yoshida-Tanaka
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan
| | - Rieko Nishi
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruka Miyata
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan
| | - Aya Abe
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yo Mabuchi
- Department of Biochemistry and Biophysics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chihiro Akazawa
- Department of Biochemistry and Biophysics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takanori Yokota
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan.
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Tian M, Hao F, Jin X, Sun X, Jiang Y, Wang Y, Li D, Chang T, Zou Y, Peng P, Xia C, Liu J, Li Y, Wang P, Feng Y, Wei M. ACLY ubiquitination by CUL3-KLHL25 induces the reprogramming of fatty acid metabolism to facilitate iTreg differentiation. eLife 2021; 10:62394. [PMID: 34491895 PMCID: PMC8423445 DOI: 10.7554/elife.62394] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 08/22/2021] [Indexed: 12/25/2022] Open
Abstract
Inducible regulatory T (iTreg) cells play a central role in immune suppression. As iTreg cells are differentiated from activated T (Th0) cells, cell metabolism undergoes dramatic changes, including a shift from fatty acid synthesis (FAS) to fatty acid oxidation (FAO). Although the reprogramming in fatty acid metabolism is critical, the mechanism regulating this process during iTreg differentiation is still unclear. Here we have revealed that the enzymatic activity of ATP-citrate lyase (ACLY) declined significantly during iTreg differentiation upon transforming growth factor β1 (TGFβ1) stimulation. This reduction was due to CUL3-KLHL25-mediated ACLY ubiquitination and degradation. As a consequence, malonyl-CoA, a metabolic intermediate in FAS that is capable of inhibiting the rate-limiting enzyme in FAO, carnitine palmitoyltransferase 1 (CPT1), was decreased. Therefore, ACLY ubiquitination and degradation facilitate FAO and thereby iTreg differentiation. Together, we suggest TGFβ1-CUL3-KLHL25-ACLY axis as an important means regulating iTreg differentiation and bring insights into the maintenance of immune homeostasis for the prevention of immune diseases.
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Affiliation(s)
- Miaomiao Tian
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Fengqi Hao
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Xin Jin
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Xue Sun
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Ying Jiang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Yang Wang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Dan Li
- Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tianyi Chang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Yingying Zou
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Pinghui Peng
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Chaoyi Xia
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Jia Liu
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Yuanxi Li
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Ping Wang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yunpeng Feng
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Min Wei
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
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9
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Van Hoeck J, Van de Vyver T, Harizaj A, Goetgeluk G, Merckx P, Liu J, Wels M, Sauvage F, De Keersmaecker H, Vanhove C, de Jong OG, Vader P, Dewitte H, Vandekerckhove B, Braeckmans K, De Smedt SC, Raemdonck K. Hydrogel-Induced Cell Membrane Disruptions Enable Direct Cytosolic Delivery of Membrane-Impermeable Cargo. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008054. [PMID: 34106486 DOI: 10.1002/adma.202008054] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 03/30/2021] [Indexed: 06/12/2023]
Abstract
Intracellular delivery of membrane-impermeable cargo offers unique opportunities for biological research and the development of cell-based therapies. Despite the breadth of available intracellular delivery tools, existing protocols are often suboptimal and alternative approaches that merge delivery efficiency with both biocompatibility, as well as applicability, remain highly sought after. Here, a comprehensive platform is presented that exploits the unique property of cationic hydrogel nanoparticles to transiently disrupt the plasma membrane of cells, allowing direct cytosolic delivery of uncomplexed membrane-impermeable cargo. Using this platform, which is termed Hydrogel-enabled nanoPoration or HyPore, the delivery of fluorescein isothiocyanate (FITC)-dextran macromolecules in various cancer cell lines and primary bovine corneal epithelial cells is convincingly demonstrated. Of note, HyPore demonstrates efficient FITC-dextran delivery in primary human T cells, outperforming state-of-the-art electroporation-mediated delivery. Moreover, the HyPore platform enables cytosolic delivery of functional proteins, including a histone-binding nanobody as well as the enzymes granzyme A and Cre-recombinase. Finally, HyPore-mediated delivery of the MRI contrast agent gadobutrol in primary human T cells significantly improves their T1 -weighted MRI signal intensities compared to electroporation. Taken together, HyPore is proposed as a straightforward, highly versatile, and cost-effective technique for high-throughput, ex vivo manipulation of primary cells and cell lines.
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Affiliation(s)
- Jelter Van Hoeck
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Thijs Van de Vyver
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Aranit Harizaj
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Glenn Goetgeluk
- Department of Diagnostic Sciences, Ghent University, Corneel Heymanslaan 10, Ghent, 9000, Belgium
| | - Pieterjan Merckx
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Jing Liu
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Mike Wels
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Félix Sauvage
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Herlinde De Keersmaecker
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
- Centre for Advanced Light Microscopy, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Christian Vanhove
- Infinity Lab, Medical Imaging and Signal Processing Group-IBiTech, Faculty of Engineering and Architecture, Ghent University, Corneel Heymanslaan 10, Ghent, 9000, Belgium
| | - Olivier G de Jong
- CDL Research, Division LAB, UMC Utrecht, Faculty of Medicine, Utrecht University, Heidelberglaan 100, Utrecht, 3584 CX, The Netherlands
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, Universiteitsweg 99, Utrecht, 3584 CG, The Netherlands
| | - Pieter Vader
- CDL Research, Division LAB, UMC Utrecht, Faculty of Medicine, Utrecht University, Heidelberglaan 100, Utrecht, 3584 CX, The Netherlands
| | - Heleen Dewitte
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Bart Vandekerckhove
- Department of Diagnostic Sciences, Ghent University, Corneel Heymanslaan 10, Ghent, 9000, Belgium
| | - Kevin Braeckmans
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
- Centre for Advanced Light Microscopy, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Stefaan C De Smedt
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
- Centre for Advanced Light Microscopy, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
| | - Koen Raemdonck
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, Ghent, 9000, Belgium
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10
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Li T, Huang L, Yang M. Lipid-based Vehicles for siRNA Delivery in Biomedical Field. Curr Pharm Biotechnol 2020; 21:3-22. [PMID: 31549951 DOI: 10.2174/1389201020666190924164152] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/04/2019] [Accepted: 08/20/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Genetic drugs have aroused much attention in the past twenty years. RNA interference (RNAi) offers novel insights into discovering potential gene functions and therapies targeting genetic diseases. Small interference RNA (siRNA), typically 21-23 nucleotides in length, can specifically degrade complementary mRNA. However, targeted delivery and controlled release of siRNA remain a great challenge. METHODS Different types of lipid-based delivery vehicles have been synthesized, such as liposomes, lipidoids, micelles, lipoplexes and lipid nanoparticles. These carriers commonly have a core-shell structure. For active targeting, ligands may be conjugated to the surface of lipid particles. RESULTS Lipid-based drug delivery vehicles can be utilized in anti-viral or anti-tumor therapies. They can also be used to tackle genetic diseases or discover novel druggable genes. CONCLUSION In this review, the structures of lipid-based vehicles and possible surface modifications are described, and applications of delivery vehicles in biomedical field are discussed.
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Affiliation(s)
- Tianzhong Li
- Department of Biomedical Sciences, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Linfeng Huang
- Department of Biomedical Sciences, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Mengsu Yang
- Department of Biomedical Sciences, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China.,Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, China
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11
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Sioud M. Unleashing the Therapeutic Potential of Dendritic and T Cell Therapies Using RNA Interference. Methods Mol Biol 2020; 2115:259-280. [PMID: 32006406 DOI: 10.1007/978-1-0716-0290-4_15] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Therapeutic dendritic cell (DC) cancer vaccines work to boost the body's immune system to fight a cancer. Although this type of immunotherapy often leads to the activation of tumor-specfic T cells, clinical responses are fairly low, arguing for the need to improve the design of DC-based vaccines. Recent studies revealed a promising strategy of combining DC vaccines with small interfering RNAs (siRNAs) targeting immunosuppressive signals such as checkpoint receptors. Similarly, incorporating checkpoint siRNA blockers in adoptive T-cell therapy to amplify cytotoxic T lymphocyte responses is now being tested in the clinic. The development of the next generation of cancer immunotherapies using siRNA technology will hopefuly benefit patients with various cancer types including those who did not respond to current therapies. This review highlights the latest advances in RNA interference technology to improve the therapeutic efficacy of DC cancer vaccines and T cell therapy.
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Affiliation(s)
- Mouldy Sioud
- Department of Immunology, Institute for Cancer Research, Oslo University Hospital-Radiumhospitalet, Ullernchausseen 70, Oslo, Norway.
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12
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Fazil MHUT, Ong ST, Chalasani MLS, Kizhakeyil A, Verma NK. GapmeR-Mediated Gene Silencing in Motile T-Cells. Methods Mol Biol 2019; 1930:67-73. [PMID: 30610600 DOI: 10.1007/978-1-4939-9036-8_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Gene silencing is an important method to study gene functions in health and diseases. While there are various techniques that are applied to knockdown specific gene(s) of interest, they have certain limitations in application to T-lymphocytes. T-cells are "hard-to-transfect" cells and are recalcitrant to transfection reagents. Here, we describe the use of novel cell-permeating antisense molecules, called "GapmeR", to knockdown specific gene(s) in human primary T-cells.
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Affiliation(s)
| | - Seow Theng Ong
- Lee Kong Chain School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
| | - Madhavi Latha Somaraju Chalasani
- Lee Kong Chain School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore.,Autoimmunity and Inflammation Program, Hospital for Special Surgery, NY, USA
| | - Atish Kizhakeyil
- Lee Kong Chain School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
| | - Navin Kumar Verma
- Lee Kong Chain School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
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13
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Sioud M. Releasing the Immune System Brakes Using siRNAs Enhances Cancer Immunotherapy. Cancers (Basel) 2019; 11:cancers11020176. [PMID: 30717461 PMCID: PMC6406640 DOI: 10.3390/cancers11020176] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 12/12/2022] Open
Abstract
Therapeutic dendritic cell (DC) cancer vaccines rely on the immune system to eradicate tumour cells. Although tumour antigen-specific T cell responses have been observed in most studies, clinical responses are fairly low, arguing for the need to improve the design of DC-based vaccines. The incorporation of small interfering RNAs (siRNAs) against immunosuppressive factors in the manufacturing process of DCs can turn the vaccine into potent immune stimulators. Additionally, siRNA modification of ex vivo-expanded T cells for adoptive immunotherapy enhanced their killing potency. Most of the siRNA-targeted immune inhibitory factors have been successful in that their blockade produced the strongest cytotoxic T cell responses in preclinical and clinical studies. Cancer patients treated with the siRNA-modified DC vaccines showed promising clinical benefits providing a strong rationale for further development of these immunogenic vaccine formulations. This review covers the progress in combining siRNAs with DC vaccines or T cell therapy to boost anti-tumour immunity.
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Affiliation(s)
- Mouldy Sioud
- Department of Immunology, Institute for Cancer Research, Oslo University Hospital-Radiumhospitalet, Montebello, N-0310 Oslo, Norway.
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14
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Ormonde JVS, Li Z, Stegen C, Madrenas J. TAOK3 Regulates Canonical TCR Signaling by Preventing Early SHP-1-Mediated Inactivation of LCK. THE JOURNAL OF IMMUNOLOGY 2018; 201:3431-3442. [PMID: 30373850 DOI: 10.4049/jimmunol.1800284] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 09/25/2018] [Indexed: 01/01/2023]
Abstract
Activation of LCK is required for canonical TCR signaling leading to T cell responses. LCK activation also initiates a negative feedback loop mediated by the phosphatase SHP-1 that turns off TCR signaling. In this article, we report that the thousand-and-one amino acid kinase 3 (TAOK3) is a key regulator of this feedback. TAOK3 is a serine/threonine kinase expressed in many different cell types including T cells. TAOK3-deficient human T cells had impaired LCK-dependent TCR signaling resulting in a defect in IL-2 response to canonical TCR signaling but not to bacterial superantigens, which use an LCK-independent pathway. This impairment was associated with enhanced interaction of LCK with SHP-1 after TCR engagement and rapid termination of TCR signals, a defect corrected by TAOK3 reconstitution. Thus, TAOK3 is a positive regulator of TCR signaling by preventing premature SHP-1-mediated inactivation of LCK. This mechanism may also regulate signaling by other Src family kinase-dependent receptors.
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Affiliation(s)
- João V S Ormonde
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and
| | - Zhigang Li
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and
| | - Camille Stegen
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and
| | - Joaquín Madrenas
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and .,Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA 90277
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15
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Zhou X, Friedmann KS, Lyrmann H, Zhou Y, Schoppmeyer R, Knörck A, Mang S, Hoxha C, Angenendt A, Backes CS, Mangerich C, Zhao R, Cappello S, Schwär G, Hässig C, Neef M, Bufe B, Zufall F, Kruse K, Niemeyer BA, Lis A, Qu B, Kummerow C, Schwarz EC, Hoth M. A calcium optimum for cytotoxic T lymphocyte and natural killer cell cytotoxicity. J Physiol 2018; 596:2681-2698. [PMID: 29368348 DOI: 10.1113/jp274964] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 01/04/2018] [Indexed: 12/13/2022] Open
Abstract
KEY POINTS Cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells are required to eliminate cancer cells. We analysed the Ca2+ dependence of CTL and NK cell cytotoxicity and found that in particular CTLs have a very low optimum of [Ca2+ ]i (between 122 and 334 nm) and [Ca2+ ]o (between 23 and 625 μm) for efficient cancer cell elimination, well below blood plasma Ca2+ levels. As predicted from these results, partial down-regulation of the Ca2+ channel Orai1 in CTLs paradoxically increases perforin-dependent cancer cell killing. Lytic granule release at the immune synapse between CTLs and cancer cells has a Ca2+ optimum compatible with this low Ca2+ optimum for efficient cancer cell killing, whereas the Ca2+ optimum for CTL migration is slightly higher and proliferation increases monotonously with increasing [Ca2+ ]o . We propose that a partial inhibition of Ca2+ signals by specific Orai1 blockers at submaximal concentrations could contribute to tumour elimination. ABSTRACT Cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells are required to protect the human body against cancer. Ca2+ is a key metabolic factor for lymphocyte function and cancer homeostasis. We analysed the Ca2+ dependence of CTL and NK cell cytotoxicity against cancer cells and found that CTLs have a bell-shaped Ca2+ dependence with an optimum for cancer cell elimination at rather low [Ca2+ ]o (23-625 μm) and [Ca2+ ]i (122-334 nm). This finding predicts that a partial inhibition of Orai1 should increase (rather than decrease) cytotoxicity of CTLs at [Ca2+ ]o higher than 625 μm. We tested this hypothesis in CTLs and indeed found that partial down-regulation of Orai1 by siRNA increases the efficiency of cancer cell killing. We found two mechanisms that may account for the Ca2+ optimum of cancer cell killing: (1) migration velocity and persistence have a moderate optimum between 500 and 1000 μm [Ca2+ ]o in CTLs, and (2) lytic granule release at the immune synapse between CTLs and cancer cells is increased at 146 μm compared to 3 or 800 μm, compatible with the Ca2+ optimum for cancer cell killing. It has been demonstrated in many cancer cell types that Orai1-dependent Ca2+ signals enhance proliferation. We propose that a decrease of [Ca2+ ]o or partial inhibition of Orai1 activity by selective blockers in the tumour microenvironment could efficiently reduce cancer growth by simultaneously increasing CTL and NK cell cytotoxicity and decreasing cancer cell proliferation.
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Affiliation(s)
- Xiao Zhou
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Kim S Friedmann
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Hélène Lyrmann
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Yan Zhou
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Rouven Schoppmeyer
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Arne Knörck
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Sebastian Mang
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Cora Hoxha
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Adrian Angenendt
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Christian S Backes
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Carmen Mangerich
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Renping Zhao
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Sabrina Cappello
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany.,Cardiovascular Physiology, University Medical Center, University of Göttingen, Göttingen, 37073, Germany
| | - Gertrud Schwär
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Carmen Hässig
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Marc Neef
- Department of Theoretical Physics, Saarland University, Saarbrücken, 66041, Germany
| | - Bernd Bufe
- Physiology, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Frank Zufall
- Physiology, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Karsten Kruse
- Department of Theoretical Physics, Saarland University, Saarbrücken, 66041, Germany.,Department of Biochemistry and Theoretical Physics, University of Geneva, Geneva, 1211, Switzerland
| | - Barbara A Niemeyer
- Molecular Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Annette Lis
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Bin Qu
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Carsten Kummerow
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Eva C Schwarz
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
| | - Markus Hoth
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, 66421, Germany
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16
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Seki A, Rutz S. Optimized RNP transfection for highly efficient CRISPR/Cas9-mediated gene knockout in primary T cells. J Exp Med 2018; 215:985-997. [PMID: 29436394 PMCID: PMC5839763 DOI: 10.1084/jem.20171626] [Citation(s) in RCA: 239] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 11/20/2017] [Accepted: 01/18/2018] [Indexed: 12/26/2022] Open
Abstract
CRISPR (clustered, regularly interspaced, short palindromic repeats)/Cas9 (CRISPR-associated protein 9) has become the tool of choice for generating gene knockouts across a variety of species. The ability for efficient gene editing in primary T cells not only represents a valuable research tool to study gene function but also holds great promise for T cell-based immunotherapies, such as next-generation chimeric antigen receptor (CAR) T cells. Previous attempts to apply CRIPSR/Cas9 for gene editing in primary T cells have resulted in highly variable knockout efficiency and required T cell receptor (TCR) stimulation, thus largely precluding the study of genes involved in T cell activation or differentiation. Here, we describe an optimized approach for Cas9/RNP transfection of primary mouse and human T cells without TCR stimulation that results in near complete loss of target gene expression at the population level, mitigating the need for selection. We believe that this method will greatly extend the feasibly of target gene discovery and validation in primary T cells and simplify the gene editing process for next-generation immunotherapies.
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Affiliation(s)
- Akiko Seki
- Department of Cancer Immunology, Genentech, South San Francisco, CA
| | - Sascha Rutz
- Department of Cancer Immunology, Genentech, South San Francisco, CA
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17
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Wayteck L, Xiong R, Braeckmans K, De Smedt SC, Raemdonck K. Comparing photoporation and nucleofection for delivery of small interfering RNA to cytotoxic T cells. J Control Release 2017; 267:154-162. [DOI: 10.1016/j.jconrel.2017.08.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/05/2017] [Accepted: 08/01/2017] [Indexed: 12/21/2022]
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18
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Song MH, Nair VS, Oh KI. Vitamin C enhances the expression of IL17 in a Jmjd2-dependent manner. BMB Rep 2017; 50:49-54. [PMID: 27931518 PMCID: PMC5319665 DOI: 10.5483/bmbrep.2017.50.1.193] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Indexed: 01/09/2023] Open
Abstract
Previously, we reported that vitamin C facilitates the CpG demethylation of Foxp3 enhancer in CD4+Foxp3+ regulatory T cells (Tregs) by enhancing the activity of a DNA demethylase ten-eleven-translocation (Tet). However, it is not clear whether vitamin C affects other helper T cell lineages like T helper type 17 (Th17) cells which are related with Tregs. Here, we show that the expression of interleukin-17A (IL17) increases with the treatment of vitamin C but not with other antioxidants. Interestingly, the upregulation of IL17 was not accompanied by DNA demethylation in Il17 promoter and was independent of Tet enzymes. Rather, vitamin C reduced the trimethylation of histone H3 lysine 9 (H3K9me3) in the regulatory elements of the Il17 locus, and the effects of vitamin C were abrogated by knockdown of jumonji-C domain-containing protein 2 (jmjd2). These results suggest that vitamin C can affect the expression of IL17 by modulating the histone demethylase activity. [BMB Reports 2017; 50(1): 49-54].
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Affiliation(s)
- Mi Hye Song
- Department of Pathology, Hallym University College of Medicine, Chuncheon 24252, Korea
| | - Varun Sasidharan Nair
- Department of Pathology, Hallym University College of Medicine, Chuncheon 24252, Korea
| | - Kwon Ik Oh
- Department of Pathology, Hallym University College of Medicine, Chuncheon 24252, Korea
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19
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Nair VS, Song MH, Ko M, Oh KI. DNA Demethylation of the Foxp3 Enhancer Is Maintained through Modulation of Ten-Eleven-Translocation and DNA Methyltransferases. Mol Cells 2016; 39:888-897. [PMID: 27989104 PMCID: PMC5223106 DOI: 10.14348/molcells.2016.0276] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 11/24/2016] [Indexed: 01/25/2023] Open
Abstract
Stable expression of Foxp3 is ensured by demethylation of CpG motifs in the Foxp3 intronic element, the conserved non-coding sequence 2 (CNS2), which persists throughout the lifespan of regulatory T cells (Tregs). However, little is known about the mechanisms on how CNS2 demethylation is sustained. In this study, we found that Ten-Eleven-Translocation (Tet) DNA dioxygenase protects the CpG motifs of CNS2 from re-methylation by DNA methyltransferases (Dnmts) and prevents Tregs from losing Foxp3 expression under inflammatory conditions. Upon stimulation of Tregs by interleukin-6 (IL6), Dnmt1 was recruited to CNS2 and induced methylation, which was inhibited by Tet2 recruited by IL2. Tet2 prevented CNS2 re-methylation by not only the occupancy of the CNS2 locus but also by its enzymatic activity. These results show that the CNS2 methylation status is dynamically regulated by a balance between Tets and Dnmts which influences the expression of Foxp3 in Tregs.
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Affiliation(s)
- Varun Sasidharan Nair
- Department of Pathology, Hallym University College of Medicine, Chuncheon 24252,
Korea
| | - Mi Hye Song
- Department of Pathology, Hallym University College of Medicine, Chuncheon 24252,
Korea
| | - Myunggon Ko
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44949,
Korea
| | - Kwon Ik Oh
- Department of Pathology, Hallym University College of Medicine, Chuncheon 24252,
Korea
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20
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GapmeR cellular internalization by macropinocytosis induces sequence-specific gene silencing in human primary T-cells. Sci Rep 2016; 6:37721. [PMID: 27883055 PMCID: PMC5121623 DOI: 10.1038/srep37721] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 10/27/2016] [Indexed: 12/21/2022] Open
Abstract
Post-transcriptional gene silencing holds great promise in discovery research for addressing intricate biological questions and as therapeutics. While various gene silencing approaches, such as siRNA and CRISPR-Cas9 techniques, are available, these cannot be effectively applied to “hard-to-transfect” primary T-lymphocytes. The locked nucleic acid-conjugated chimeric antisense oligonucleotide, called “GapmeR”, is an emerging new class of gene silencing molecule. Here, we show that GapmeR internalizes into human primary T-cells through macropinocytosis. Internalized GapmeR molecules can associate with SNX5-positive macropinosomes in T-cells, as detected by super-resolution microscopy. Utilizing the intrinsic self-internalizing capability of GapmeR, we demonstrate significant and specific depletion (>70%) of the expression of 5 different endogenous proteins with varying molecular weights (18 kDa Stathmin, 80 kDa PKCε, 180 kDa CD11a, 220 kDa Talin1 and 450 kDa CG-NAP/AKAP450) in human primary and cultured T-cells. Further functional analysis confirms CG-NAP and Stathmin as regulators of T-cell motility. Thus, in addition to screening, identifying or verifying critical roles of various proteins in T-cell functioning, this study provides novel opportunities to silence individual or multiple genes in a subset of purified human primary T-cells that would be exploited as future therapeutics.
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21
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Caffrey LM, deRonde BM, Minter LM, Tew GN. Mapping Optimal Charge Density and Length of ROMP-Based PTDMs for siRNA Internalization. Biomacromolecules 2016; 17:3205-3212. [PMID: 27599388 PMCID: PMC5094354 DOI: 10.1021/acs.biomac.6b00900] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A fundamental understanding of how polymer structure impacts internalization and delivery of biologically relevant cargoes, particularly small interfering ribonucleic acid (siRNA), is of critical importance to the successful design of improved delivery reagents. Herein we report the use of ring-opening metathesis polymerization (ROMP) methods to synthesize two series of guanidinium-rich protein transduction domain mimics (PTDMs): one based on an imide scaffold that contains one guanidinium moiety per repeat unit, and another based on a diester scaffold that contains two guanidinium moieties per repeat unit. By varying both the degree of polymerization and, in effect, the relative number of cationic charges in each PTDM, the performances of the two ROMP backbones for siRNA internalization were evaluated and compared. Internalization of fluorescently labeled siRNA into Jurkat T cells demonstrated that fluorescein isothiocyanate (FITC)-siRNA internalization had a charge content dependence, with PTDMs containing approximately 40 to 60 cationic charges facilitating the most internalization. Despite this charge content dependence, the imide scaffold yielded much lower viabilities in Jurkat T cells than the corresponding diester PTDMs with similar numbers of cationic charges, suggesting that the diester scaffold is preferred for siRNA internalization and delivery applications. These developments will not only improve our understanding of the structural factors necessary for optimal siRNA internalization, but will also guide the future development of optimized PTDMs for siRNA internalization and delivery.
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Affiliation(s)
- Leah M Caffrey
- Department of Polymer Science and Engineering, ‡Department of Veterinary and Animal Sciences, and §Molecular and Cellular Biology Program, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Brittany M deRonde
- Department of Polymer Science and Engineering, ‡Department of Veterinary and Animal Sciences, and §Molecular and Cellular Biology Program, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Lisa M Minter
- Department of Polymer Science and Engineering, ‡Department of Veterinary and Animal Sciences, and §Molecular and Cellular Biology Program, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Gregory N Tew
- Department of Polymer Science and Engineering, ‡Department of Veterinary and Animal Sciences, and §Molecular and Cellular Biology Program, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
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22
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Holzmann C, Kilch T, Kappel S, Dörr K, Jung V, Stöckle M, Bogeski I, Peinelt C. Differential Redox Regulation of Ca²⁺ Signaling and Viability in Normal and Malignant Prostate Cells. Biophys J 2016; 109:1410-9. [PMID: 26445441 DOI: 10.1016/j.bpj.2015.08.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 08/04/2015] [Accepted: 08/06/2015] [Indexed: 12/11/2022] Open
Abstract
In prostate cancer, reactive oxygen species (ROS) are elevated and Ca(2+) signaling is impaired. Thus, several novel therapeutic strategies have been developed to target altered ROS and Ca(2+) signaling pathways in prostate cancer. Here, we investigate alterations of intracellular Ca(2+) and inhibition of cell viability caused by ROS in primary human prostate epithelial cells (hPECs) from healthy tissue and prostate cancer cell lines (LNCaP, DU145, and PC3). In hPECs, LNCaP and DU145 H2O2 induces an initial Ca(2+) increase, which in prostate cancer cells is blocked at high concentrations of H2O2. Upon depletion of intracellular Ca(2+) stores, store-operated Ca(2+) entry (SOCE) is activated. SOCE channels can be formed by hexameric Orai1 channels; however, Orai1 can form heteromultimers with its homolog, Orai3. Since the redox sensor of Orai1 (Cys-195) is absent in Orai3, the Orai1/Orai3 ratio in T cells determines the redox sensitivity of SOCE and cell viability. In prostate cancer cells, SOCE is blocked at lower concentrations of H2O2 compared with hPECs. An analysis of data from hPECs, LNCaP, DU145, and PC3, as well as previously published data from naive and effector TH cells, demonstrates a strong correlation between the Orai1/Orai3 ratio and the SOCE redox sensitivity and cell viability. Therefore, our data support the concept that store-operated Ca(2+) channels in hPECs and prostate cancer cells are heteromeric Orai1/Orai3 channels with an increased Orai1/Orai3 ratio in cells derived from prostate cancer tumors. In addition, ROS-induced alterations in Ca(2+) signaling in prostate cancer cells may contribute to the higher sensitivity of these cells to ROS.
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Affiliation(s)
- Christian Holzmann
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Tatiana Kilch
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany; Center of Human and Molecular Biology, Saarland University, Homburg, Germany
| | - Sven Kappel
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Kathrin Dörr
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Volker Jung
- Clinics of Urology and Pediatric Urology, Saarland University, Homburg, Germany
| | - Michael Stöckle
- Clinics of Urology and Pediatric Urology, Saarland University, Homburg, Germany
| | - Ivan Bogeski
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Christine Peinelt
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany; Center of Human and Molecular Biology, Saarland University, Homburg, Germany.
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Bhat SS, Friedmann KS, Knörck A, Hoxha C, Leidinger P, Backes C, Meese E, Keller A, Rettig J, Hoth M, Qu B, Schwarz EC. Syntaxin 8 is required for efficient lytic granule trafficking in cytotoxic T lymphocytes. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1863:1653-64. [PMID: 27094127 DOI: 10.1016/j.bbamcr.2016.04.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 03/23/2016] [Accepted: 04/14/2016] [Indexed: 12/21/2022]
Abstract
Cytotoxic T lymphocytes (CTL) eliminate pathogen-infected and cancerous cells mainly by polarized secretion of lytic granules (LG, containing cytotoxic molecules like perforin and granzymes) at the immunological synapse (IS). Members of the SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) family are involved in trafficking (generation, transport and fusion) of vesicles at the IS. Syntaxin 8 (Stx8) is expressed in LG and colocalizes with the T cell receptor (TCR) upon IS formation. Here, we report the significance of Stx8 for human CTL cytotoxicity. We found that Stx8 mostly localized in late, recycling endosomal and lysosomal compartments with little expression in early endosomal compartments. Down-regulation of Stx8 by siRNA resulted in reduced cytotoxicity. We found that following perforin release of the pre-existing pool upon target cell contact, Stx8 down-regulated CTL regenerate perforin pools less efficiently and thus release less perforin compared to control CTL. CD107a degranulation, real-time and end-point population cytotoxicity assays, and high resolution microscopy support our conclusion that Stx8 is required for proper and timely sorting and trafficking of cytotoxic molecules to functional LG through the endosomal pathway in human CTL.
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Affiliation(s)
- Shruthi S Bhat
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
| | - Kim S Friedmann
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
| | - Arne Knörck
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
| | - Cora Hoxha
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
| | - Petra Leidinger
- Human Genetics, School of Medicine, Saarland University, Building 60, 66421 Homburg, Germany.
| | - Christina Backes
- Center for Bioinformatics, Saarland University, Building E2.1, 66123 Saarbrücken, Germany.
| | - Eckart Meese
- Human Genetics, School of Medicine, Saarland University, Building 60, 66421 Homburg, Germany.
| | - Andreas Keller
- Center for Bioinformatics, Saarland University, Building E2.1, 66123 Saarbrücken, Germany.
| | - Jens Rettig
- Physiology, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
| | - Markus Hoth
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
| | - Bin Qu
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
| | - Eva C Schwarz
- Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, Building 48, 66421 Homburg, Germany.
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24
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Reducing IRF-1 to Levels Observed in HESN Subjects Limits HIV Replication, But Not the Extent of Host Immune Activation. MOLECULAR THERAPY-NUCLEIC ACIDS 2015; 4:e259. [PMID: 26506037 PMCID: PMC4881757 DOI: 10.1038/mtna.2015.29] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 08/19/2015] [Indexed: 12/14/2022]
Abstract
Cells from women who are epidemiologically deemed resistant to HIV infection exhibit a 40-60% reduction in endogenous IRF-1 (interferon regulatory factor-1), an essential regulator of host antiviral immunity and the early HIV replication. This study examined the functional consequences of reducing endogenous IRF-1 on HIV-1 replication and immune response to HIV in natural HIV target cells. IRF-1 knockdown was achieved in ex vivo CD4(+) T cells and monocytes with siRNA. IRF-1 level was assessed using flow cytometry, prior to infection with HIV-Bal, HIV-IIIB, or HIV-VSV-G. Transactivation of HIV long terminal repeats was assessed by p24 secretion (ELISA) and Gag expression (reverse transcription-polymerase chain reaction (RT-PCR)). The expression of IRF-1-regulated antiviral genes was quantitated with RT-PCR. A modest 20-40% reduction in endogenous IRF-1 was achieved in >87% of ex vivo-derived peripheral CD4(+) T cells and monocytes, resulted in >90% reduction in the transactivation of the HIV-1 genes (Gag, p24) and, hence, HIV replication. Curiously, these HIV-resistant women demonstrated normal immune responses, nor an increased susceptibility to other infection. Similarly, modest IRF-1 knockdown had limited impact on the magnitude of HIV-1-elicited activation of IRF-1-regulated host immunologic genes but resulted in lessened duration of these responses. These data suggest that early expression of HIV-1 genes requires a higher IRF-1 level, compared to the host antiviral genes. Together, these provide one key mechanism underlying the natural resistance against HIV infection and further suggest that modest IRF-1 reduction could effectively limit productive HIV infection yet remain sufficient to activate a robust but transient immune response.
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Abstract
The therapeutic potential of dendritic cell (DC) cancer vaccines has gained momentum in recent years. However, clinical data indicate that antitumor immune responses generally fail to translate into measurable tumor regression. This has been ascribed to a variety of tolerance mechanisms, one of which is the expression of immunosuppressive factors by DCs and T cells. With respect to cancer immunotherapies, these factors antagonise the ability to induce robust and sustained immunity required for tumor cell eradication. Gene silencing of immunosuppressive factors in either DCs or adoptive transferred T cells enhanced anti-tumor immune responses and significantly inhibited tumor growth. Therefore, engineered next generation of DC vaccines or adoptive T-cell therapy should include immunomodulatory siRNAs to release the "brakes" imposed by the immune system. Moreover, the combination of gene silencing, antigen targeting to DCs and cytoplasmic cargo delivery will improve clinical benefits.
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Key Words
- AML, acute myeloid leukemia
- CMV, human cytomegalovirus
- CTLA4, T-lymphocyte-associated antigen 4
- DC, Dendritic cells
- Gal, galectin hTERT, human telomerase reverse transcriptase
- IDO, indoleamine 2,3-dioxygenase
- IL, interleukin
- INF, interferon
- NK, natural killer
- PD1, programmed cell death
- RNA interference
- RNAi, RNA interference
- SOCS1, suppressor of cytokine signaling
- STAT, Signal transducer and activator of transcription
- T-cell therapy
- TCR, T cell receptor
- TLR, toll like receptor
- Treg, Regulatory T
- cancer vaccine
- gene silencing
- immunotherapy
- siRNA, small interfering RNA
- targeted therapies
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Affiliation(s)
- Mouldy Sioud
- a Department of Immunology; Institute for Cancer Research ; Oslo University Hospital ; Montebello , Norway
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26
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deRonde BM, Torres JA, Minter LM, Tew GN. Development of Guanidinium-Rich Protein Mimics for Efficient siRNA Delivery into Human T Cells. Biomacromolecules 2015; 16:3172-9. [PMID: 26324222 DOI: 10.1021/acs.biomac.5b00795] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
RNA interference is gaining attention as a means to explore new molecular pathways and for its potential as a therapeutic; however, its application in immortal and primary T cells is limited due to challenges with efficient delivery in these cell types. Herein, we report the development of guanidinium-rich protein transduction domain mimics (PTDMs) based on a ring-opening metathesis polymerization scaffold that delivers siRNA into Jurkat T cells and human peripheral blood mononuclear cells (hPBMCs). Homopolymer and block copolymer PTDMs with varying numbers of guanidinium moieties were designed and tested to assess the effect cationic charge content and the addition of a segregated, hydrophobic block had on siRNA internalization and delivery. Internalization of fluorescently labeled siRNA into Jurkat T cells illustrates that the optimal cationic charge content, 40 charges per polymer, leads to higher efficiencies, with block copolymers outperforming their homopolymer counterparts. PTDMs also outperformed commercial reagents commonly used for siRNA delivery applications. Select PTDM candidates were further screened to assess the role the PTDM structure has on the delivery of biologically active siRNA into primary cells. Specifically, siRNA to hNOTCH1 was delivered to hPBMCs enabling 50-80% knockdown efficiencies, with longer PTDMs showing improved protein reduction. By evaluating the PTDM design parameters for siRNA delivery, more efficient PTDMs were discovered that improved delivery and gene (NOTCH) knockdown in T cells. Given the robust delivery of siRNA by these novel PTDMs, their development should aid in the exploration of T cell molecular pathways leading eventually to new therapeutics.
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Affiliation(s)
- Brittany M deRonde
- Department of Polymer Science and Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Joe A Torres
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States.,Molecular and Cellular Biology Program, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Lisa M Minter
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States.,Molecular and Cellular Biology Program, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Gregory N Tew
- Department of Polymer Science and Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States.,Department of Veterinary and Animal Sciences, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States.,Molecular and Cellular Biology Program, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
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27
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Haftmann C, Riedel R, Porstner M, Wittmann J, Chang HD, Radbruch A, Mashreghi MF. Direct uptake of Antagomirs and efficient knockdown of miRNA in primary B and T lymphocytes. J Immunol Methods 2015; 426:128-33. [PMID: 26187895 PMCID: PMC4655414 DOI: 10.1016/j.jim.2015.07.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 06/09/2015] [Accepted: 07/09/2015] [Indexed: 12/28/2022]
Abstract
Depending on their physiological expression level, microRNAs (miRNA) address different target genes, thus have different biological functions. To identify these, the physiological expression has to be blocked. Here, we describe the use of inhibitory cholesterol-modified oligonucleotides (Antagomirs) to inhibit miRNAs selectively in primary human and murine T and B lymphocytes. Due to their lipophilic cholesterol tag Antagomirs enter primary lymphocytes efficiently and quantitatively. We show here that at concentrations of 0.125 to 1μM, Antagomirs selectively inhibit expression of their target miRNA up to 99.5% without affecting cell viability.
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Affiliation(s)
- Claudia Haftmann
- Cell Biology, Deutsches Rheuma-Forschungszentrum Berlin (DRFZ), a Leibniz institute, Berlin, Germany
| | - René Riedel
- Cell Biology, Deutsches Rheuma-Forschungszentrum Berlin (DRFZ), a Leibniz institute, Berlin, Germany
| | - Martina Porstner
- Division of Molecular Immunology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Jürgen Wittmann
- Division of Molecular Immunology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Hyun-Dong Chang
- Cell Biology, Deutsches Rheuma-Forschungszentrum Berlin (DRFZ), a Leibniz institute, Berlin, Germany
| | - Andreas Radbruch
- Cell Biology, Deutsches Rheuma-Forschungszentrum Berlin (DRFZ), a Leibniz institute, Berlin, Germany
| | - Mir-Farzin Mashreghi
- Cell Biology, Deutsches Rheuma-Forschungszentrum Berlin (DRFZ), a Leibniz institute, Berlin, Germany.
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28
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Cationic polyaspartamide-based nanocomplexes mediate siRNA entry and down-regulation of the pro-inflammatory mediator high mobility group box 1 in airway epithelial cells. Int J Pharm 2015; 491:359-66. [PMID: 26140987 DOI: 10.1016/j.ijpharm.2015.06.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/12/2015] [Accepted: 06/14/2015] [Indexed: 02/07/2023]
Abstract
High-mobility group box 1 (HMGB1) is a nonhistone protein secreted by airway epithelial cells in hyperinflammatory diseases such as asthma. In order to down-regulate HMGB1 expression in airway epithelial cells, siRNA directed against HMGB1 was delivered through nanocomplexes based on a cationic copolymer of poly(N-2-hydroxyethyl)-d,l-aspartamide (PHEA) by using H441 cells. Two copolymers were used in these experiments bearing respectively spermine side chains (PHEA-Spm) and both spermine and PEG2000 chains (PHEA-PEG-Spm). PHEA-Spm and PHEA-PEG-Spm derivatives complexed dsDNA oligonucleotides with a w/w ratio of 1 and higher as shown by a gel retardation assay. PHEA-Spm and PHEA-PEG-Spm siRNA polyplexes were sized 350-650 nm and 100-400 nm respectively and ranged from negativity/neutrality (at 0.5 ratio) to positivity (at 5 ratio) as ζ potential. Polyplexes formed either at a ratio of 0.5 (partially complexing) or at the ratio of 5 (fully complexing) were tested in subsequent experiments. Epifluorescence revealed that nanocomplexes favored siRNA entry into H441 cells in comparison with naked siRNA. As determined by flow cytometry and a trypan blue assay, PHEA-Spm and PHEA-PEG-Spm allowed siRNA uptake in 42-47% and 30% of cells respectively, however only with PHEA-Spm at w/w ratio of 5 these percentages were significantly higher than those obtained with naked siRNA (20%). Naked siRNA or complexed scrambled siRNA did not exert any effect on HMGB1mRNA levels, whereas PHEA-Spm/siRNA at the w/w ratio of 5 down-regulated HMGB1 mRNA up to 58% of control levels (untransfected cells). PEGylated PHEA-Spm/siRNA nanocomplexes were able to down-regulate HMGB1 mRNA levels up to 61% of control cells. MTT assay revealed excellent biocompatibility of copolymer/siRNA polyplexes with cells. In conclusion, we have found optimal conditions for down-regulation of HMGB1 by siRNA delivery mediated by polyaminoacidic polymers in airway epithelial cells in the absence of cytotoxicity. Functional and in-vivo studies are warranted.
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29
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Synthesis of a stabilized 177Lu–siRNA complex and evaluation of its stability and RNAi activity. Nucl Med Commun 2015; 36:636-45. [DOI: 10.1097/mnm.0000000000000292] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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30
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Taylor HE, Simmons GE, Mathews TP, Khatua AK, Popik W, Lindsley CW, D’Aquila RT, Brown HA. Phospholipase D1 Couples CD4+ T Cell Activation to c-Myc-Dependent Deoxyribonucleotide Pool Expansion and HIV-1 Replication. PLoS Pathog 2015; 11:e1004864. [PMID: 26020637 PMCID: PMC4447393 DOI: 10.1371/journal.ppat.1004864] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 04/07/2015] [Indexed: 12/25/2022] Open
Abstract
Quiescent CD4+ T cells restrict human immunodeficiency virus type 1 (HIV-1) infection at early steps of virus replication. Low levels of both deoxyribonucleotide triphosphates (dNTPs) and the biosynthetic enzymes required for their de novo synthesis provide one barrier to infection. CD4+ T cell activation induces metabolic reprogramming that reverses this block and facilitates HIV-1 replication. Here, we show that phospholipase D1 (PLD1) links T cell activation signals to increased HIV-1 permissivity by triggering a c-Myc-dependent transcriptional program that coordinates glucose uptake and nucleotide biosynthesis. Decreasing PLD1 activity pharmacologically or by RNA interference diminished c-Myc-dependent expression during T cell activation at the RNA and protein levels. PLD1 inhibition of HIV-1 infection was partially rescued by adding exogenous deoxyribonucleosides that bypass the need for de novo dNTP synthesis. Moreover, the data indicate that low dNTP levels that impact HIV-1 restriction involve decreased synthesis, and not only increased catabolism of these nucleotides. These findings uncover a unique mechanism of action for PLD1 inhibitors and support their further development as part of a therapeutic combination for HIV-1 and other viral infections dependent on host nucleotide biosynthesis.
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Affiliation(s)
- Harry E. Taylor
- Northwestern HIV Translational Research Center, Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
- * E-mail: (HET); (HAB)
| | - Glenn E. Simmons
- Department of Molecular Genetics, University of Texas, Southwestern Medical Center, Dallas, Texas, United States of America
| | - Thomas P. Mathews
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Atanu K. Khatua
- Meharry Medical College, Center for AIDS Health Disparities Research, Nashville, Tennessee, United States of America
| | - Waldemar Popik
- Meharry Medical College, Center for AIDS Health Disparities Research, Nashville, Tennessee, United States of America
| | - Craig W. Lindsley
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Chemistry, Vanderbilt University, Nashville, Tennesee, United States of America
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Richard T. D’Aquila
- Northwestern HIV Translational Research Center, Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - H. Alex Brown
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- * E-mail: (HET); (HAB)
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31
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Ngamcherdtrakul W, Morry J, Gu S, Castro DJ, Goodyear SM, Sangvanich T, Reda MM, Lee R, Mihelic SA, Beckman BL, Hu Z, Gray JW, Yantasee W. Cationic Polymer Modified Mesoporous Silica Nanoparticles for Targeted SiRNA Delivery to HER2+ Breast Cancer. ADVANCED FUNCTIONAL MATERIALS 2015; 25:2646-2659. [PMID: 26097445 PMCID: PMC4469082 DOI: 10.1002/adfm.201404629] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In vivo delivery of siRNAs designed to inhibit genes important in cancer and other diseases continues to be an important biomedical goal. We now describe a new nanoparticle construct that has been engineered for efficient delivery of siRNA to tumors. The construct is comprised of a 47-nm mesoporous silica nanoparticle (MSNP) core coated with a cross-linked PEI-PEG copolymer, carrying siRNA against the HER2 oncogene, and coupled to the anti-HER2 monoclonal antibody (trastuzumab). The construct has been engineered to increase siRNA blood half-life, enhance tumor-specific cellular uptake, and maximize siRNA knockdown efficacy. The optimized anti-HER2-nanoparticles produced apoptotic death in HER2 positive (HER2+) breast cancer cells grown in vitro, but not in HER2 negative (HER2-) cells. One dose of the siHER2-nanoparticles reduced HER2 protein levels by 60% in trastuzumab-resistant HCC1954 xenografts. Multiple doses administered intravenously over 3 weeks significantly inhibited tumor growth (p < 0.004). The siHER2-nanoparticles have an excellent safety profile in terms of blood compatibility and low cytokine induction, when exposed to human peripheral blood mononuclear cells. The construct can be produced with high batch-to-batch reproducibility and the production methods are suitable for large-scale production. These results suggest that this siHER2-nanoparticle is ready for clinical evaluation.
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Affiliation(s)
- Worapol Ngamcherdtrakul
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Jingga Morry
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Shenda Gu
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - David J. Castro
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
- PDX Pharmaceuticals 24 Independence Ave, Lake Oswego, OR 97035
| | - Shaun M. Goodyear
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Thanapon Sangvanich
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Moataz M. Reda
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Richard Lee
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Samuel A. Mihelic
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Brandon L. Beckman
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Zhi Hu
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Joe W. Gray
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
| | - Wassana Yantasee
- Department of Biomedical Engineering, Oregon Health & Science University 3303 SW Bond Ave, Portland, OR 97239
- PDX Pharmaceuticals 24 Independence Ave, Lake Oswego, OR 97035
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32
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Alansary D, Bogeski I, Niemeyer BA. Facilitation of Orai3 targeting and store-operated function by Orai1. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:1541-50. [PMID: 25791427 DOI: 10.1016/j.bbamcr.2015.03.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 03/04/2015] [Accepted: 03/10/2015] [Indexed: 11/27/2022]
Abstract
Orai1 subunits interacting with STIM1 molecules comprise the major components responsible for calcium release-activated calcium (CRAC) channels. The homologs Orai2 and Orai3 yield smaller store-operated currents when overexpressed and are mostly unable to substitute Orai1. Orai3 subunits are also essential components of store independent channel complexes and also tune inhibition of ICRAC by reactive oxygen species. Here we use patch-clamp, microscopy, Ca(2+)-imaging and biochemical experiments to investigate the interdependence of Orai2, Orai3 and Orai1. We demonstrate that store-operation and localization of Orai3 but not of Orai2 to STIM1 clusters in HEK cells or to the immunological synapse in T cells is facilitated by Orai1 while Orai3's store-independent activity remains unaffected. On the other hand, one Orai3 subunit confers redox-resistance to heteromeric channels. The inefficient store operation of Orai3 is partly due to the lack of three critical C-terminal residues, the insertion of which improves interaction with STIM1 and abrogates Orai3's dependence on Orai1. Our results suggest that Orai3 down-tunes efficient STIM1 gating when in a heteromeric complex with Orai1.
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Affiliation(s)
- Dalia Alansary
- Molecular Biophysics, School of Medicine, Saarland University, 66421 Homburg, Germany
| | - Ivan Bogeski
- Biophysics, Center for Integrated Physiology and Molecular Medicine (CIPMM), School of Medicine, Saarland University, 66421 Homburg, Germany
| | - Barbara A Niemeyer
- Molecular Biophysics, School of Medicine, Saarland University, 66421 Homburg, Germany.
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33
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Rutz S, Kayagaki N, Phung QT, Eidenschenk C, Noubade R, Wang X, Lesch J, Lu R, Newton K, Huang OW, Cochran AG, Vasser M, Fauber BP, DeVoss J, Webster J, Diehl L, Modrusan Z, Kirkpatrick DS, Lill JR, Ouyang W, Dixit VM. Deubiquitinase DUBA is a post-translational brake on interleukin-17 production in T cells. Nature 2014; 518:417-21. [PMID: 25470037 DOI: 10.1038/nature13979] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 10/16/2014] [Indexed: 12/31/2022]
Abstract
T-helper type 17 (TH17) cells that produce the cytokines interleukin-17A (IL-17A) and IL-17F are implicated in the pathogenesis of several autoimmune diseases. The differentiation of TH17 cells is regulated by transcription factors such as RORγt, but post-translational mechanisms preventing the rampant production of pro-inflammatory IL-17A have received less attention. Here we show that the deubiquitylating enzyme DUBA is a negative regulator of IL-17A production in T cells. Mice with DUBA-deficient T cells developed exacerbated inflammation in the small intestine after challenge with anti-CD3 antibodies. DUBA interacted with the ubiquitin ligase UBR5, which suppressed DUBA abundance in naive T cells. DUBA accumulated in activated T cells and stabilized UBR5, which then ubiquitylated RORγt in response to TGF-β signalling. Our data identify DUBA as a cell-intrinsic suppressor of IL-17 production.
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Affiliation(s)
- Sascha Rutz
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Nobuhiko Kayagaki
- Department of Physiological Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Qui T Phung
- Department of Protein Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Celine Eidenschenk
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Rajkumar Noubade
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Xiaoting Wang
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Justin Lesch
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Rongze Lu
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Kim Newton
- Department of Physiological Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Oscar W Huang
- Department of Early Discovery Biochemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Andrea G Cochran
- Department of Early Discovery Biochemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Mark Vasser
- Department of Protein Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Benjamin P Fauber
- Discovery Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Jason DeVoss
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Joshua Webster
- Department of Pathology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Lauri Diehl
- Department of Pathology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Zora Modrusan
- Department of Molecular Biology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Donald S Kirkpatrick
- Department of Protein Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Jennie R Lill
- Department of Protein Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Wenjun Ouyang
- Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
| | - Vishva M Dixit
- Department of Physiological Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, USA
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Fan M, Zhang Y, Huang Z, Liu J, Guo X, Zhang H, Luo H. Optimizations of siRNA design for the activation of gene transcription by targeting the TATA-box motif. PLoS One 2014; 9:e108253. [PMID: 25250958 PMCID: PMC4176967 DOI: 10.1371/journal.pone.0108253] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 08/20/2014] [Indexed: 12/24/2022] Open
Abstract
Small interfering RNAs (siRNAs) are widely used to repress gene expression by targeting mRNAs. Some reports reveal that siRNAs can also activate or inhibit gene expression through targeting the gene promoters. Our group has found that microRNAs (miRNAs) could activate gene transcription via interaction with the TATA-box motif in gene promoters. To investigate whether siRNA targeting the same region could upregulate the promoter activity, we test the activating efficiency of siRNAs targeting the TATA-box motif of 16 genes and perform a systematic analysis to identify the common features of the functional siRNAs for effective activation of gene promoters. Further, we try various modifications to improve the activating efficiency of siRNAs and find that it is quite useful to design the promoter-targeting activating siRNA by following several rules such as (a) complementary to the TATA-box-centered region; (b) UA usage at the first two bases of the antisense strand; (c) twenty-three nucleotides (nts) in length; (d) 2'-O-Methyl (2'-OMe) modification at the 3' terminus of the antisense strand; (e) avoiding mismatches at the 3' end of the antisense strand. The optimized activating siRNAs potently enhance the expression of interleukin-2 (IL-2) gene in human and mouse primary CD4+ T cells with a long-time effect. Taken together, our study provides a guideline for rational design the promoter-targeting siRNA to sequence-specifically enhance gene expression.
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Affiliation(s)
- Miaomiao Fan
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yijun Zhang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Zhuoqiong Huang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jun Liu
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Xuemin Guo
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Hui Zhang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- * E-mail: (HZ); (HL)
| | - Haihua Luo
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
- * E-mail: (HZ); (HL)
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Holzmann C, Kilch T, Kappel S, Armbrüster A, Jung V, Stöckle M, Bogeski I, Schwarz EC, Peinelt C. ICRAC controls the rapid androgen response in human primary prostate epithelial cells and is altered in prostate cancer. Oncotarget 2014; 4:2096-107. [PMID: 24240085 PMCID: PMC3875772 DOI: 10.18632/oncotarget.1483] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Labelled 5α-dihydrotestosterone (DHT) binding experiments have shown that expression levels of (yet unidentified) membrane androgen receptors (mAR) are elevated in prostate cancer and correlate with a negative prognosis. However, activation of these receptors which mediate a rapid androgen response can counteract several cancer hallmark functions such as unlimited proliferation, enhanced migration, adhesion and invasion and the inability to induce apoptosis. Here, we investigate the downstream signaling pathways of mAR and identify rapid DHT induced activation of store-operated Ca2+ entry (SOCE) in primary cultures of human prostate epithelial cells (hPEC) from non-tumorous tissue. Consequently, down-regulation of Orai1, the main molecular component of Ca2+ release-activated Ca2+ (CRAC) channels results in an almost complete loss of DHT induced SOCE. We demonstrate that this DHT induced Ca2+ influx via Orai1 is important for rapid androgen triggered prostate specific antigen (PSA) release. We furthermore identified alterations of the molecular components of CRAC channels in prostate cancer. Three lines of evidence indicate that prostate cancer cells down-regulate expression of the Orai1 homolog Orai3: First, Orai3 mRNA expression levels are significantly reduced in tumorous tissue when compared to non-tumorous tissue from prostate cancer patients. Second, mRNA expression levels of Orai3 are decreased in prostate cancer cell lines LNCaP and DU145 when compared to hPEC from healthy tissue. Third, the pharmacological profile of CRAC channels in prostate cancer cell lines and hPEC differ and siRNA based knock-down experiments indicate changed Orai3 levels are underlying the altered pharmacological profile. The cancer-specific composition and pharmacology of CRAC channels identifies CRAC channels as putative targets in prostate cancer therapy.
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Naik E, Webster JD, DeVoss J, Liu J, Suriben R, Dixit VM. Regulation of proximal T cell receptor signaling and tolerance induction by deubiquitinase Usp9X. ACTA ACUST UNITED AC 2014; 211:1947-55. [PMID: 25200027 PMCID: PMC4172213 DOI: 10.1084/jem.20140860] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The T cell hyperproliferation and autoimmune phenotypes that manifest in mice lacking E3 ubiquitin ligases such as Cbl, ITCH, or GRAIL highlight the importance of ubiquitination for the maintenance of peripheral T cell tolerance. Less is known, however, about the deubiquitinating enzymes that regulate T cell proliferation and effector function. Here, we define a cell intrinsic role for the deubiquitinase Usp9X during proximal TCR signaling. Usp9X-deficient T cells were hypoproliferative, yet mice with T cell-specific Usp9x deletion had elevated numbers of antigen-experienced T cells and expanded PD-1 and OX40-expressing populations consistent with immune hyperactivity. Aged Usp9x KO mice developed lupus-like autoimmunity and lymphoproliferative disease, indicating that ubiquitin ligases and deubiquitinases maintain the delicate balance between effective immunity and self-tolerance.
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Affiliation(s)
- Edwina Naik
- Department of Physiological Chemistry, Department of Pathology, Department of Immunology, Department of Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, CA 94080
| | - Joshua D Webster
- Department of Physiological Chemistry, Department of Pathology, Department of Immunology, Department of Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, CA 94080
| | - Jason DeVoss
- Department of Physiological Chemistry, Department of Pathology, Department of Immunology, Department of Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, CA 94080
| | - Jinfeng Liu
- Department of Physiological Chemistry, Department of Pathology, Department of Immunology, Department of Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, CA 94080
| | - Rowena Suriben
- Department of Physiological Chemistry, Department of Pathology, Department of Immunology, Department of Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, CA 94080
| | - Vishva M Dixit
- Department of Physiological Chemistry, Department of Pathology, Department of Immunology, Department of Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, CA 94080
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37
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Neumann C, Heinrich F, Neumann K, Junghans V, Mashreghi MF, Ahlers J, Janke M, Rudolph C, Mockel-Tenbrinck N, Kühl AA, Heimesaat MM, Esser C, Im SH, Radbruch A, Rutz S, Scheffold A. Role of Blimp-1 in programing Th effector cells into IL-10 producers. ACTA ACUST UNITED AC 2014; 211:1807-19. [PMID: 25073792 PMCID: PMC4144744 DOI: 10.1084/jem.20131548] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The transcriptional regulator Blimp-1 is absolutely required for IL-10 production in Th1 cells and limits inflammatory effector T cell responses downstream of IL-12 and IL-27. Secretion of the immunosuppressive cytokine interleukin (IL) 10 by effector T cells is an essential mechanism of self-limitation during infection. However, the transcriptional regulation of IL-10 expression in proinflammatory T helper (Th) 1 cells is insufficiently understood. We report a crucial role for the transcriptional regulator Blimp-1, induced by IL-12 in a STAT4-dependent manner, in controlling IL-10 expression in Th1 cells. Blimp-1 deficiency led to excessive inflammation during Toxoplasma gondii infection with increased mortality. IL-10 production from Th1 cells was strictly dependent on Blimp-1 but was further enhanced by the synergistic function of c-Maf, a transcriptional regulator of IL-10 induced by multiple factors, such as the Notch pathway. We found Blimp-1 expression, which was also broadly induced by IL-27 in effector T cells, to be antagonized by transforming growth factor (TGF) β. While effectively blocking IL-10 production from Th1 cells, TGF-β shifted IL-10 regulation from a Blimp-1–dependent to a Blimp-1–independent pathway in IL-27–induced Tr1 (T regulatory 1) cells. Our findings further illustrate how IL-10 regulation in Th cells relies on several transcriptional programs that integrate various signals from the environment to fine-tune expression of this critical immunosuppressive cytokine.
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Affiliation(s)
- Christian Neumann
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
| | - Frederik Heinrich
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany
| | - Katrin Neumann
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
| | - Victoria Junghans
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
| | - Mir-Farzin Mashreghi
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany
| | - Jonas Ahlers
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
| | - Marko Janke
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany
| | - Christine Rudolph
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
| | | | - Anja A Kühl
- Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
| | - Markus M Heimesaat
- Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
| | - Charlotte Esser
- Leibniz Research Institute for Environmental Medicine, 40225 Düsseldorf, Germany
| | - Sin-Hyeog Im
- Academy of Immunology and Microbiology (AIM), Institute for Basic Science (IBS) Pohang, Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Andreas Radbruch
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany
| | - Sascha Rutz
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany
| | - Alexander Scheffold
- German Rheumatism Research Centre Berlin, an Institute of the Leibniz-Association, 10117 Berlin, Germany Department of Rheumatology and Clinical Immunology, Medical Clinic I, Gastroenterology, and Department of Microbiology and Hygiene, Charité University Hospital, 10117 Berlin, Germany
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38
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Troegeler A, Lastrucci C, Duval C, Tanne A, Cougoule C, Maridonneau-Parini I, Neyrolles O, Lugo-Villarino G. An efficient siRNA-mediated gene silencing in primary human monocytes, dendritic cells and macrophages. Immunol Cell Biol 2014; 92:699-708. [PMID: 24890643 DOI: 10.1038/icb.2014.39] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 05/01/2014] [Accepted: 05/03/2014] [Indexed: 01/08/2023]
Abstract
Mononuclear phagocytes (MP) comprise monocytes, macrophages (MΦ) and dendritic cells (DC), including their lineage-committed progenitors, which together have an eminent role in health and disease. Lipid-based siRNA-mediated gene inactivation is an established approach to investigate gene function in MP cells. However, although there are few protocols dedicated for siRNA-mediated gene inactivation in primary human DC and MΦ, there are none available for primary human monocytes. Moreover, there is no available method to perform comparative studies of a siRNA-mediated gene silencing in primary monocytes and other MP cells. Here, we describe a protocol optimized for the lipid-based delivery of siRNA to perform gene silencing in primary human blood monocytes, which is applicable to DCs, and differs from the classical route of siRNA delivery into MΦs. Along with this protocol, we provide a comparative analysis of how monocytes, DC and MΦ are efficiently transfected with the target siRNA without affecting cell viability, resulting in strong gene knockdown efficiency, including the simultaneous inactivation of two genes. Moreover, siRNA delivery does not affect classical functions in MP such as differentiation, phagocytosis and migration, demonstrating that this protocol does not induce non-specific major alterations in these cells. As a proof-of-principle, a functional analysis of hematopoietic cell kinase (Hck) shows for the first time that this kinase regulates the protease-dependent migration mode in human monocytes. Collectively, this protocol enables efficient gene inactivation in primary MP, suggesting a wide spectrum of applications such as siRNA-based high-throughput screening, which could ultimately improve our knowledge about MP biology.
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Affiliation(s)
- Anthony Troegeler
- 1] CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France [2] Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Claire Lastrucci
- 1] CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France [2] Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Carine Duval
- 1] CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France [2] Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Antoine Tanne
- Division of Hematology & Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mt Sinai, New York, NY, USA
| | - Céline Cougoule
- 1] CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France [2] Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Isabelle Maridonneau-Parini
- 1] CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France [2] Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Olivier Neyrolles
- 1] CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France [2] Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Geanncarlo Lugo-Villarino
- 1] CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France [2] Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, Université Paul Sabatier, Toulouse, France
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NRROS negatively regulates reactive oxygen species during host defence and autoimmunity. Nature 2014; 509:235-9. [PMID: 24739962 DOI: 10.1038/nature13152] [Citation(s) in RCA: 169] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 02/14/2014] [Indexed: 02/06/2023]
Abstract
Reactive oxygen species (ROS) produced by phagocytes are essential for host defence against bacterial and fungal infections. Individuals with defective ROS production machinery develop chronic granulomatous disease. Conversely, excessive ROS can cause collateral tissue damage during inflammatory processes and therefore needs to be tightly regulated. Here we describe a protein, we termed negative regulator of ROS (NRROS), which limits ROS generation by phagocytes during inflammatory responses. NRROS expression in phagocytes can be repressed by inflammatory signals. NRROS-deficient phagocytes produce increased ROS upon inflammatory challenges, and mice lacking NRROS in their phagocytes show enhanced bactericidal activity against Escherichia coli and Listeria monocytogenes. Conversely, these mice develop severe experimental autoimmune encephalomyelitis owing to oxidative tissue damage in the central nervous system. Mechanistically, NRROS is localized to the endoplasmic reticulum, where it directly interacts with nascent NOX2 (also known as gp91(phox) and encoded by Cybb) monomer, one of the membrane-bound subunits of the NADPH oxidase complex, and facilitates the degradation of NOX2 through the endoplasmic-reticulum-associated degradation pathway. Thus, NRROS provides a hitherto undefined mechanism for regulating ROS production--one that enables phagocytes to produce higher amounts of ROS, if required to control invading pathogens, while minimizing unwanted collateral tissue damage.
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siRNA delivery via electropulsation: a review of the basic processes. Methods Mol Biol 2014; 1121:81-98. [PMID: 24510814 DOI: 10.1007/978-1-4614-9632-8_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Due to their capacity for inducing strong and sequence specific gene silencing in cells, small interfering RNAs (siRNAs) are now recognized not only as powerful experimental tools for basic research in Molecular biology but with promising potentials in therapeutic development. Delivery is a bottleneck in many studies. There is a common opinion that full potential of siRNA as therapeutic agent will not be attained until better methodologies for its targeted intracellular delivery to cells and tissues are developed. Electropulsation (EP) is one of the physical methods successfully used to transfer siRNA into living cells in vitro and in vivo. This review will describe how siRNA electrotransfer obeys characterized biophysical processes (cell-size-dependent electropermeabilization, electrophoretic drag) with a strong control of a low loss of viability. Protocols can be easily adjusted by a proper setting of the electrical parameters and pulsing buffers. EP can be easily directly applied on animals. Preclinical studies showed that electropermeabilization brings a direct cytoplasmic distribution of siRNA and an efficient silencing of the targeted protein expression. EP appears as a promising tool for clinical applications of gene silencing. A panel of successful trials will be given.
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41
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Jung U, Jiang X, Kaufmann SH, Patzel V. A universal TaqMan-based RT-PCR protocol for cost-efficient detection of small noncoding RNA. RNA (NEW YORK, N.Y.) 2013; 19:1864-1873. [PMID: 24149841 PMCID: PMC3884658 DOI: 10.1261/rna.040501.113] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 09/10/2013] [Indexed: 06/02/2023]
Abstract
Several methods for the detection of RNA have been developed over time. For small RNA detection, a stem-loop reverse primer-based protocol relying on TaqMan RT-PCR has been described. This protocol requires an individual specific TaqMan probe for each target RNA and, hence, is highly cost-intensive for experiments with small sample sizes or large numbers of different samples. We describe a universal TaqMan-based probe protocol which can be used to detect any target sequence and demonstrate its applicability for the detection of endogenous as well as artificial eukaryotic and bacterial small RNAs. While the specific and the universal probe-based protocol showed the same sensitivity, the absolute sensitivity of detection was found to be more than 100-fold lower for both than previously reported. In subsequent experiments, we found previously unknown limitations intrinsic to the method affecting its feasibility in determination of mature template RISC incorporation as well as in multiplexing. Both protocols were equally specific in discriminating between correct and incorrect small RNA targets or between mature miRNA and its unprocessed RNA precursor, indicating the stem-loop RT-primer, but not the TaqMan probe, triggers target specificity. The presented universal TaqMan-based RT-PCR protocol represents a cost-efficient method for the detection of small RNAs.
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Affiliation(s)
- Ulrike Jung
- Department of Immunology, Max Planck Institute for Infection Biology, D-10117 Berlin, Germany
- Department of Molecular and Cell Biology, Beckman Research Institute, City of Hope Medical Center, Duarte, California 91010, USA
| | - Xiaoou Jiang
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Stefan H.E. Kaufmann
- Department of Immunology, Max Planck Institute for Infection Biology, D-10117 Berlin, Germany
| | - Volker Patzel
- Department of Immunology, Max Planck Institute for Infection Biology, D-10117 Berlin, Germany
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
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Freeley M, Long A. The two hit hypothesis: An improved method for siRNA-mediated gene silencing in stimulated primary human T cells. J Immunol Methods 2013; 396:116-27. [DOI: 10.1016/j.jim.2013.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 07/12/2013] [Accepted: 08/06/2013] [Indexed: 12/28/2022]
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43
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Advances in siRNA delivery to T-cells: potential clinical applications for inflammatory disease, cancer and infection. Biochem J 2013; 455:133-47. [DOI: 10.1042/bj20130950] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The specificity of RNAi and its ability to silence ‘undruggable’ targets has made inhibition of gene expression in T-cells with siRNAs an attractive potential therapeutic strategy for the treatment of inflammatory disease, cancer and infection. However, delivery of siRNAs into primary T-cells represents a major hurdle to their use as potential therapeutic agents. Recent advances in siRNA delivery through the use of electroporation/nucleofection, viral vectors, peptides/proteins, nanoparticles, aptamers and other agents have now enabled efficient gene silencing in primary T-cells both in vitro and in vivo. Overcoming such barriers in siRNA delivery offers exciting new prospects for directly targeting T-cells systemically with siRNAs, or adoptively transferring T-cells back into patients following ex vivo manipulation with siRNAs. In the present review, we outline the challenges in delivering siRNAs into primary T-cells and discuss the mechanism and therapeutic opportunities of each delivery method. We emphasize studies that have exploited RNAi-mediated gene silencing in T-cells for the treatment of inflammatory disease, cancer and infection using mouse models. We also discuss the potential therapeutic benefits of manipulating T-cells using siRNAs for the treatment of human diseases.
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44
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Lee SK, Tung CH. A fabricated siRNA nanoparticle for ultra-long gene silencing in vivo. ADVANCED FUNCTIONAL MATERIALS 2013; 23:3488-3493. [PMID: 24999314 PMCID: PMC4078887 DOI: 10.1002/adfm.201202777] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Persistent gene silencing is crucially required for the successful therapeutics of short interfering RNA (siRNA). Here, we describe a nanoparticle based delivery system which assembled by layering siRNAs between protease degradable polypeptides to extend the therapeutic window. These tightly packed nanoparticles are efficiently taken up by cells by endocytosis, and the fabricated siRNAs are gradually released following intracellular degradation of the polypeptide layers. During cell division, the particles are distributed to the daughter cells. Due to the slow degradation through the multiple layers, the particles continuously release siRNA in all cells. Using this controlled release construct, the in vivo gene silencing effect of siRNA is consistent for an ultra-long period of time (>3 weeks) with only a single treatment.
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Vaish N, Agarwal P. The design, selection, and evaluation of highly specific and functional siRNA incorporating unlocked nucleobase analogs. Methods Mol Biol 2013; 942:111-34. [PMID: 23027048 DOI: 10.1007/978-1-62703-119-6_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The efficient and specific silencing of genes via RNA interference (RNAi) for functional genomics and therapeutics depends on careful consideration of the factors that affect the functionality of small interfering RNA (siRNA). These factors include (1) the length of sequence available for siRNA targeting of an mRNA, (2) the structural and thermodynamic properties of target and siRNA sequences, (3) the mechanisms of siRNA off-target effects, and (4) the susceptibility of siRNA degradation when exposed to nucleases in serum and inside cells. Incorporation of Unlocked Nucleobase analogs (UNAs) in the siRNA design offers an attractive approach to design highly efficacious siRNAs with dramatically reduced off-target activity. Here, we describe methods and principles pertaining to the design, selection and screening of optimal siRNAs containing UNA.
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Novel protein transduction domain mimics as nonviral delivery vectors for siRNA targeting NOTCH1 in primary human T cells. Mol Ther 2012; 21:201-9. [PMID: 23070119 DOI: 10.1038/mt.2012.209] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
RNA interference technology has recently been highlighted as a powerful research method as well as a potential therapeutic treatment for several diseases. However, the delivery of small interfering RNA (siRNA) into T cell lines and primary blood cells is exceedingly challenging, as they are resistant to transfection by conventional reagents. As a result, there is an unmet need for nonviral, efficient, and easily prepared carriers for siRNA delivery into hard-to-transfect cell types. Here, we report a novel system based on protein transduction domain mimics (PTDMs), generated by ring opening metathesis polymerization, for intracellular delivery of siRNA molecules. PTDM-based siRNA delivery induced efficient NOTCH1 knockdown in Jurkat T cells and human peripheral blood mononuclear cells without any measured toxicity. Furthermore, delivering siRNA to NOTCH1 in human peripheral blood cells modulated cell proliferation and differentiation of T cells into T(H)1 cells.
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Physicochemical characterization techniques for lipid based delivery systems for siRNA. Int J Pharm 2012; 427:35-57. [DOI: 10.1016/j.ijpharm.2011.09.032] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Revised: 09/20/2011] [Accepted: 09/21/2011] [Indexed: 01/24/2023]
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Rutz S, Noubade R, Eidenschenk C, Ota N, Zeng W, Zheng Y, Hackney J, Ding J, Singh H, Ouyang W. Transcription factor c-Maf mediates the TGF-β-dependent suppression of IL-22 production in T(H)17 cells. Nat Immunol 2011; 12:1238-45. [PMID: 22001828 DOI: 10.1038/ni.2134] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Accepted: 09/06/2011] [Indexed: 12/12/2022]
Abstract
Interleukin 22 (IL-22), which is produced by cells of the T(H)17 subset of helper T cells and other leukocytes, not only enhances proinflammatory innate defense mechanisms in epithelial cells but also provides crucial protection to tissues from damage caused by inflammation and infection. In T(H)17 cells, transforming growth factor-β (TGF-β) regulates IL-22 and IL-17 differently. IL-6 alone induces T cells to produce only IL-22, whereas the combination of IL-6 and high concentrations of TGF-β results in the production of IL-17 but not IL-22 by T cells. Here we identify the transcription factor c-Maf, which is induced by TGF-β, as a downstream repressor of Il22. We found that c-Maf bound to the Il22 promoter and was both necessary and sufficient for the TGF-β-dependent suppression of IL-22 production in T(H)17 cells.
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MESH Headings
- Animals
- Base Sequence
- Basic-Leucine Zipper Transcription Factors/genetics
- Basic-Leucine Zipper Transcription Factors/metabolism
- Binding Sites/genetics
- Cells, Cultured
- Gene Expression Profiling
- Gene Expression Regulation/drug effects
- HEK293 Cells
- Humans
- Interleukins/biosynthesis
- Interleukins/genetics
- Mice
- Mice, Inbred BALB C
- Nuclear Receptor Subfamily 1, Group F, Member 3/genetics
- Nuclear Receptor Subfamily 1, Group F, Member 3/metabolism
- Nucleotide Motifs
- Promoter Regions, Genetic
- Proto-Oncogene Proteins c-maf/genetics
- Proto-Oncogene Proteins c-maf/metabolism
- Receptors, Aryl Hydrocarbon/genetics
- Receptors, Aryl Hydrocarbon/metabolism
- Th17 Cells/drug effects
- Th17 Cells/immunology
- Transcription, Genetic
- Transforming Growth Factor beta/pharmacology
- Interleukin-22
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Affiliation(s)
- Sascha Rutz
- Department of Immunology, Genentech, South San Francisco, California, USA
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Qu B, Pattu V, Junker C, Schwarz EC, Bhat SS, Kummerow C, Marshall M, Matti U, Neumann F, Pfreundschuh M, Becherer U, Rieger H, Rettig J, Hoth M. Docking of lytic granules at the immunological synapse in human CTL requires Vti1b-dependent pairing with CD3 endosomes. THE JOURNAL OF IMMUNOLOGY 2011; 186:6894-904. [PMID: 21562157 DOI: 10.4049/jimmunol.1003471] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Lytic granule (LG)-mediated apoptosis is the main mechanism by which CTL kill virus-infected and tumorigenic target cells. CTL form a tight junction with the target cells, which is called the immunological synapse (IS). To avoid unwanted killing of neighboring cells, exocytosis of lytic granules (LG) is tightly controlled and restricted to the IS. In this study, we show that in activated human primary CD8(+) T cells, docking of LG at the IS requires tethering LG with CD3-containing endosomes (CD3-endo). Combining total internal reflection fluorescence microscopy and fast deconvolution microscopy (both in living cells) with confocal microscopy (in fixed cells), we found that LG and CD3-endo tether and are cotransported to the IS. Paired but not single LG are accumulated at the IS. The dwell time of LG at the IS is substantially enhanced by tethering with CD3-endo, resulting in a preferential release of paired LG over single LG. The SNARE protein Vti1b is required for tethering of LG and CD3-endo. Downregulation of Vti1b reduces tethering of LG with CD3-endo. This leads to an impaired accumulation and docking of LG at the IS and a reduction of target cell killing. Therefore, Vti1b-dependent tethering of LG and CD3-endo determines accumulation, docking, and efficient lytic granule secretion at the IS.
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Affiliation(s)
- Bin Qu
- Department of Biophysics, Saarland University, 66421 Homburg, Germany
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