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Lu C, Wen T, Zheng M, Liu D, Quan G, Pan X, Wu C. Poly(Ethylene Glycol) Crosslinked Multi-Armed Poly(l-Lysine) with Encapsulating Capacity and Antimicrobial Activity for the Potential Treatment of Infection-Involved Multifactorial Diseases. Pharmaceutics 2020; 12:pharmaceutics12010047. [PMID: 31935837 PMCID: PMC7022689 DOI: 10.3390/pharmaceutics12010047] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 12/23/2019] [Accepted: 01/03/2020] [Indexed: 02/05/2023] Open
Abstract
With the development of modern medical technology, common diseases usually can be treated by traditional medicines and their formulation, while diseases with multiple etiologies still remain a great challenge in clinic. Nanoformulation was widely explored to address this problem. However, due to limited drug loading space of nanocarriers, co-delivery strategy usually fails to achieve sufficient loading of multiple drugs simultaneously. In this research, we explored the potential of poly(ethylene glycol) (PEG) crosslinked alternating copolymers MPLL-alt-PEG as both an anionic drug carrier and antimicrobial agent. The high cationic charge density of multi-armed poly(l-lysine) (MPLL) segments in MPLL-alt-PEG could endow the electrostatic encapsulation of anionic model drugs through the formation of polyion complex micelles with a MPLL/drug complex core and crosslinked PEG outer shell, enabling pH-sensitive drug release. Meanwhile, the MPLL-alt-PEG copolymer exhibits a broad spectrum of antimicrobial activities against various clinically relevant microorganisms with low hemolytic activity. Studies on antibacterial mechanism revealed that MPLL-alt-PEG attacked bacteria through the membrane disruption mechanism which is similar to that of typical antimicrobial peptides. Taken together, the present study shed light on the possibility of endowing a polymeric carrier with therapeutic effect and thus offered a promising strategy for achieving a comprehensive treatment of bacterial infection-involved multifactorial diseases.
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Affiliation(s)
- Chao Lu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Ting Wen
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
- Correspondence: (T.W.); (G.Q.); Tel.: +86-20-39943115 (G.Q.)
| | - Maochao Zheng
- Department of chemistry, Shantou University Medical College, Shantou 515041, China
| | - Daojun Liu
- Department of chemistry, Shantou University Medical College, Shantou 515041, China
| | - Guilan Quan
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
- College of Pharmacy, Jinan University, Guangzhou 510632, China
- Correspondence: (T.W.); (G.Q.); Tel.: +86-20-39943115 (G.Q.)
| | - Xin Pan
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Chuanbin Wu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
- College of Pharmacy, Jinan University, Guangzhou 510632, China
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Combination immunotherapies implementing adoptive T-cell transfer for advanced-stage melanoma. Melanoma Res 2019. [PMID: 29521881 DOI: 10.1097/cmr.0000000000000436] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Immunotherapy is a promising method of treatment for a number of cancers. Many of the curative results have been seen specifically in advanced-stage melanoma. Despite this, single-agent therapies are only successful in a small percentage of patients, and relapse is very common. As chemotherapy is becoming a thing of the past for treatment of melanoma, the combination of cellular therapies with immunotherapies appears to be on the rise in in-vivo models and in clinical trials. These forms of therapies include tumor-infiltrating lymphocytes, T-cell receptor, or chimeric antigen receptor-modified T cells, cytokines [interleukin (IL-2), IL-15, IL-12, granulocyte-macrophage colony stimulating factor, tumor necrosis factor-α, interferon-α, interferon-γ], antibodies (αPD-1, αPD-L1, αTIM-3, αOX40, αCTLA-4, αLAG-3), dendritic cell-based vaccines, and chemokines (CXCR2). There are a substantial number of ongoing clinical trials using two or more of these combination therapies. Preliminary results indicate that these combination therapies are a promising area to focus on for cancer treatments, especially melanoma. The main challenges with the combination of cellular and immunotherapies are adverse events due to toxicities and autoimmunity. Identifying mechanisms for reducing or eliminating these adverse events remains a critical area of research. Many important questions still need to be elucidated in regard to combination cellular therapies and immunotherapies, but with the number of ongoing clinical trials, the future of curative melanoma therapies is promising.
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Jóźwicki W, Brożyna AA, Siekiera J, Slominski AT. Frequency of CD4+CD25+Foxp3+ cells in peripheral blood in relation to urinary bladder cancer malignancy indicators before and after surgical removal. Oncotarget 2016; 7:11450-62. [PMID: 26862849 PMCID: PMC4905485 DOI: 10.18632/oncotarget.7199] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 01/12/2016] [Indexed: 01/09/2023] Open
Abstract
Tumor cells communicate with stromal cells, including cancer-associated fibroblasts (CAFs) and tumor-associated macrophages (TAMs), to form microenvironment inhibiting immune responses. Regulatory T cells (Tregs, CD4+CD25+FoxP3+) stimulate immune tolerance and facilitate tumor progression. We analyzed the changes in Treg frequencies assessed using flow cytometry in the peripheral blood of patients with urothelial bladder cancer before and after tumor-removal. Changes in Treg frequency were investigated in relation to clinicopathomorphological indicators of tumor malignancy and expression of RCAS1 on CAFs and TAMs. Higher Treg frequencies were observed in early phase of tumor growth (pTa-pT2), in larger tumors, with more aggressive type of invasion, and with expression of RCAS1. The later phase of tumor development, accompanied by a nonclassic differentiations and pT3-pT4 advancement, had lower number of tumor infiltrating lymphocytes (TILs) and lower Treg frequency. Furthermore, in pT2-pT4 tumors, a decreased post-surgery Treg frequency was associated with poorer prognosis: patients with the lowest frequency of Tregs died first. These findings strongly suggest that the Treg frequencies at later phase of tumor growth, associated with a low anti-tumor response, represent a new and important prognostic indicator in urinary bladder cancer.
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Affiliation(s)
- Wojciech Jóźwicki
- Department of Tumour Pathology and Pathomorphology, Nicolaus Copernicus University Collegium Medicum in Bydgoszcz, Bydgoszcz 85-796, Poland
- Department of Tumour Pathology and Pathomorphology, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz 85-796, Poland
| | - Anna A. Brożyna
- Department of Tumour Pathology and Pathomorphology, Nicolaus Copernicus University Collegium Medicum in Bydgoszcz, Bydgoszcz 85-796, Poland
- Department of Tumour Pathology and Pathomorphology, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz 85-796, Poland
| | - Jerzy Siekiera
- Department of Urology, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz 85-796, Poland
| | - Andrzej T. Slominski
- Departments of Dermatology and Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- VA Medical Center, Birmingham, AL 35233, USA
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Kakizaki A, Fujimura T, Furudate S, Kambayashi Y, Yamauchi T, Yagita H, Aiba S. Immunomodulatory effect of peritumorally administered interferon-beta on melanoma through tumor-associated macrophages. Oncoimmunology 2015; 4:e1047584. [PMID: 26451326 PMCID: PMC4589056 DOI: 10.1080/2162402x.2015.1047584] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 04/27/2015] [Accepted: 04/29/2015] [Indexed: 12/24/2022] Open
Abstract
An imbalance of immunosuppressive cells and cytotoxic cells plays an important role in the tumor-bearing host. Together with regulatory T cells (Tregs), tumor-associated macrophages (TAMs) play roles in maintaining the tumor microenvironment. Since interferon beta (IFN-β) has been clinically used for the treatment of malignant melanoma, we investigated the immunomodulatory effect of IFN-β during melanoma growth to elucidate the effects of IFN-β on the tumor microenvironment by using the B16F10 melanoma model. Peritumorally administered IFN-β significantly decreased the mRNA expression and production of Th2-related chemokines, which suppressed the recruitment of Tregs in B16F10 melanoma. Since the administration of IFN-β augments the expression of PD-1 on TILs, the co-administration of anti-PD-1 Ab augmented the therapeutic effect of IFN-β for the treatment of B16F10 melanoma. Moreover, in parallel with the mouse model, in the human system, IFN-β decreased the production of Th2-related chemokines and augmented the production of Th1-related chemokines from monocyte-derived M2 macrophages. Since these immunomodulatory effects of IFN-β on macrophages were also observed in the lesional skin of human in-transit melanoma, our present data suggest one of the possible immunomodulatory effects of IFN-β and support the possibility of IFN-β in combination with anti-PD-1 Ab for the treatment of melanoma.
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Affiliation(s)
- Aya Kakizaki
- Department of Dermatology; Tohoku University Graduate School of Medicine ; Sendai, Japan
| | - Taku Fujimura
- Department of Dermatology; Tohoku University Graduate School of Medicine ; Sendai, Japan
| | - Sadanori Furudate
- Department of Dermatology; Tohoku University Graduate School of Medicine ; Sendai, Japan
| | - Yumi Kambayashi
- Department of Dermatology; Tohoku University Graduate School of Medicine ; Sendai, Japan
| | - Takeshi Yamauchi
- Department of Dermatology; Tohoku University Graduate School of Medicine ; Sendai, Japan
| | - Hideo Yagita
- Department of Immunology; Juntendo University School of Medicine ; Tokyo, Japan
| | - Setsuya Aiba
- Department of Dermatology; Tohoku University Graduate School of Medicine ; Sendai, Japan
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Hammerstad SS, Grock SF, Lee HJ, Hasham A, Sundaram N, Tomer Y. Diabetes and Hepatitis C: A Two-Way Association. Front Endocrinol (Lausanne) 2015; 6:134. [PMID: 26441826 PMCID: PMC4568414 DOI: 10.3389/fendo.2015.00134] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 08/17/2015] [Indexed: 12/15/2022] Open
Abstract
Diabetes and hepatitis C infection are both prevalent diseases worldwide, and are associated with increased morbidity and mortality. Most studies, but not all, have shown that patients with chronic hepatitis C are more prone to develop type 2 diabetes (T2D) compared to healthy controls, as well as when compared to patients with other liver diseases, including hepatitis B. Furthermore, epidemiological studies have revealed that patients with T2D may also be at higher risk for worse outcomes of their hepatitis C infection, including reduced rate of sustained virological response, progression to fibrosis and cirrhosis, and higher risk for development of hepatocellular carcinoma. Moreover, hepatitis C infection and mainly its treatment, interferon α, can trigger the development of type 1 diabetes. In this review, we discuss the existing data on this two-way association between diabetes and hepatitis C infection with emphasis on possible mechanisms. It remains to be determined whether the new curative therapies for chronic hepatitis C will improve outcomes in diabetic hepatitis C patients, and conversely whether treatment with Metformin will reduce complications from hepatitis C virus infection. We propose an algorithm for diabetes screening and follow-up in hepatitis C patients.
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Affiliation(s)
- Sara Salehi Hammerstad
- Department of Medicine, Division of Endocrinology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pediatrics, Oslo University Hospital Ullevål, Oslo, Norway
| | - Shira Frankel Grock
- Department of Medicine, Division of Endocrinology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Hanna J. Lee
- Department of Medicine, Division of Endocrinology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Alia Hasham
- Department of Medicine, Division of Endocrinology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Nina Sundaram
- Department of Medicine, Division of Endocrinology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Yaron Tomer
- Department of Medicine, Division of Endocrinology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- James J. Peters VA Medical Center, Bronx, NY, USA
- *Correspondence: Yaron Tomer, Division of Endocrinology, Icahn School of Medicine at Mount Sinai, Box 1055, One Gustave L. Levy Place, New York, NY 10029, USA,
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Smigiel KS, Srivastava S, Stolley JM, Campbell DJ. Regulatory T-cell homeostasis: steady-state maintenance and modulation during inflammation. Immunol Rev 2014; 259:40-59. [PMID: 24712458 DOI: 10.1111/imr.12170] [Citation(s) in RCA: 160] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Regulatory T (Treg) cells play a vital role in the prevention of autoimmunity and the maintenance of self-tolerance, but these cells also have an active role in inhibiting immune responses during viral, bacterial, and parasitic infections. Although excessive Treg activity can lead to immunodeficiency, chronic infection, and cancer, too little Treg activity results in autoimmunity and immunopathology and impairs the quality of pathogen-specific responses. Recent studies have helped define the homeostatic mechanisms that support the diverse pool of peripheral Treg cells under steady-state conditions and delineate how the abundance and function of Treg cells changes during inflammation. These findings are highly relevant for developing effective strategies to manipulate Treg cell activity to promote allograft tolerance and treat autoimmunity, chronic infection, and cancer.
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Affiliation(s)
- Kate S Smigiel
- Benaroya Research Institute, Seattle, WA, USA; Department of Immunology, University of Washington School of Medicine, Seattle, WA, USA
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Lightman S, Taylor SRJ, Bunce C, Longhurst H, Lynn W, Moots R, Stanford M, Tomkins-Netzer O, Yang D, Calder VL, Haskard DO. Pegylated interferon-α-2b reduces corticosteroid requirement in patients with Behçet's disease with upregulation of circulating regulatory T cells and reduction of Th17. Ann Rheum Dis 2014; 74:1138-44. [DOI: 10.1136/annrheumdis-2014-205571] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 09/13/2014] [Indexed: 12/14/2022]
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Srivastava S, Koch LK, Campbell DJ. IFNαR signaling in effector but not regulatory T cells is required for immune dysregulation during type I IFN-dependent inflammatory disease. THE JOURNAL OF IMMUNOLOGY 2014; 193:2733-42. [PMID: 25092894 DOI: 10.4049/jimmunol.1401039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Type I IFNs are a family of proinflammatory cytokines that are essential for antiviral immunity but whose overexpression is associated with several autoimmune disorders. In this study, we asked how chronic IFN overexpression regulates the activity of different cell types and how this contributes to immune dysfunction during IFN-associated inflammatory diseases. We show that in mice that chronically overproduce type I IFNs owing to loss of the DNA exonuclease Trex1, inflammatory disease completely depends on IFNαR signaling in T cells. Although IFNs directly inhibited the proliferation and activation of Foxp3(+) regulatory T cells, this was neither required nor sufficient for development of inflammatory disease. Rather, chronic IFN expression directly promoted the expansion and activation of effector T cells, and disease development was completely dependent on IFNαR signaling in these cells. Thus, chronic IFN expression can drive inflammatory disease via its direct effects on effector, but not regulatory, T cells.
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Affiliation(s)
- Shivani Srivastava
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; Department of Immunology, University of Washington School of Medicine, Seattle, WA 98195; and
| | - Lisa K Koch
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; Department of Pathology, University of Washington School of Medicine, Seattle, WA 98195
| | - Daniel J Campbell
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; Department of Immunology, University of Washington School of Medicine, Seattle, WA 98195; and
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Srivastava S, Koch MA, Pepper M, Campbell DJ. Type I interferons directly inhibit regulatory T cells to allow optimal antiviral T cell responses during acute LCMV infection. ACTA ACUST UNITED AC 2014; 211:961-74. [PMID: 24711580 PMCID: PMC4010906 DOI: 10.1084/jem.20131556] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Inhibition of T reg cells by type I IFNs is necessary for the generation of optimal antiviral T cell responses during acute LCMV infection. Regulatory T (T reg) cells play an essential role in preventing autoimmunity but can also impair clearance of foreign pathogens. Paradoxically, signals known to promote T reg cell function are abundant during infection and could inappropriately enhance T reg cell activity. How T reg cell function is restrained during infection to allow the generation of effective antiviral responses remains largely unclear. We demonstrate that the potent antiviral type I interferons (IFNs) directly inhibit co-stimulation–dependent T reg cell activation and proliferation, both in vitro and in vivo during acute infection with lymphocytic choriomeningitis virus (LCMV). Loss of the type I IFN receptor specifically in T reg cells results in functional impairment of virus-specific CD8+ and CD4+ T cells and inefficient viral clearance. Together, these data demonstrate that inhibition of T reg cells by IFNs is necessary for the generation of optimal antiviral T cell responses during acute LCMV infection.
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10
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Agrawal A. Mechanisms and implications of age-associated impaired innate interferon secretion by dendritic cells: a mini-review. Gerontology 2013; 59:421-6. [PMID: 23615484 DOI: 10.1159/000350536] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 03/06/2013] [Indexed: 11/19/2022] Open
Abstract
Initial secretion of interferons by innate immune cells such as dendritic cells is crucial for protection against infections as well as for alerting and activating the downstream immune responses. The secretion of innate interferons, both type I and type III, by dendritic cells is severely impaired in aged subjects. This review focuses on the mechanisms responsible for the reduced interferon secretion by dendritic cells and the role this plays in the increased susceptibility of the elderly to infections, particularly of the respiratory mucosa.
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Affiliation(s)
- Anshu Agrawal
- Division of Basic and Clinical Immunology, Department of Medicine, University of California, Irvine, CA 92697, USA.
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