1
|
Mariniello A, Nasti TH, Chang DY, Hashimoto M, Malik S, McManus DT, Lee J, McGuire DJ, Cardenas MA, Umana P, Nicolini V, Antia R, Saha A, Buchwald Z, Kissick H, Ghorani E, Novello S, Sangiolo D, Scagliotti GV, Ramalingam SS, Ahmed R. Platinum-Based Chemotherapy Attenuates the Effector Response of CD8 T Cells to Concomitant PD-1 Blockade. Clin Cancer Res 2024; 30:1833-1845. [PMID: 37992307 PMCID: PMC11061601 DOI: 10.1158/1078-0432.ccr-23-1316] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/27/2023] [Accepted: 11/20/2023] [Indexed: 11/24/2023]
Abstract
PURPOSE Combination of chemotherapy with programmed cell death 1 (PD-1) blockade is a front-line treatment for lung cancer. However, it remains unknown whether and how chemotherapy affects the response of exhausted CD8 T cells to PD-1 blockade. EXPERIMENTAL DESIGN We used the well-established mouse model of T-cell exhaustion with chronic lymphocytic choriomeningitis virus (LCMV) infection to assess the effect of chemotherapy (cisplatin+pemetrexed) on T-cell response to PD-1 blockade, in the absence of the impact of chemotherapy on antigen release and presentation observed in tumor models. RESULTS When concomitantly administered with PD-1 blockade, chemotherapy affected the differentiation path of LCMV-specific CD8 T cells from stem-like to transitory effector cells, thereby reducing their expansion and production of IFNγ. After combination treatment, these restrained effector responses resulted in impaired viral control, compared with PD-1 blockade alone. The sequential combination strategy, where PD-1 blockade followed chemotherapy, proved to be superior to the concomitant combination, preserving the proliferative response of exhausted CD8 T cells to PD-1 blockade. Our findings suggest that the stem-like CD8 T cells themselves are relatively unaffected by chemotherapy partly because they are quiescent and maintained by slow self-renewal at the steady state. However, upon the proliferative burst mediated by PD-1 blockade, the accelerated differentiation and self-renewal of stem-like cells may be curbed by concomitant chemotherapy, ultimately resulting in impaired overall CD8 T-cell effector functions. CONCLUSIONS In a translational context, we provide a proof-of-concept to consider optimizing the timing of chemo-immunotherapy strategies for improved CD8 T-cell functions. See related commentary by Vignali and Luke, p. 1705.
Collapse
Affiliation(s)
- Annapaola Mariniello
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Department of Oncology, University of Torino, Turin, Italy
- Winship Cancer Institute, Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Tahseen H. Nasti
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
| | - Daniel Y. Chang
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
| | - Masao Hashimoto
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
| | - Sakshi Malik
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
| | - Daniel T. McManus
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
| | - Judong Lee
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
| | - Donald J. McGuire
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
| | - Maria A. Cardenas
- Department of Urology, Emory University School of Medicine, Atlanta, Georgia
| | - Pablo Umana
- Roche Pharma Research and Early Development, Roche Innovation Center Zurich, Schlieren, Switzerland
| | - Valeria Nicolini
- Roche Pharma Research and Early Development, Roche Innovation Center Zurich, Schlieren, Switzerland
| | - Rustom Antia
- Department of Biology, Emory University, Atlanta, Georgia
| | - Ananya Saha
- Department of Biology, Emory University, Atlanta, Georgia
| | - Zachary Buchwald
- Winship Cancer Institute, Winship Cancer Institute of Emory University, Atlanta, Georgia
- Department of Radiation Oncology, Emory University School of Medicine, Atlanta, Georgia
| | - Hayden Kissick
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Winship Cancer Institute, Winship Cancer Institute of Emory University, Atlanta, Georgia
- Department of Urology, Emory University School of Medicine, Atlanta, Georgia
| | - Ehsan Ghorani
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Cancer Immunology and Immunotherapy Unit, Imperial College London, Department of Surgery and Cancer, London, United Kingdom
| | - Silvia Novello
- Department of Oncology, University of Torino, Turin, Italy
| | - Dario Sangiolo
- Department of Oncology, University of Torino, Turin, Italy
| | | | - Suresh S. Ramalingam
- Winship Cancer Institute, Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Rafi Ahmed
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Winship Cancer Institute, Winship Cancer Institute of Emory University, Atlanta, Georgia
| |
Collapse
|
2
|
Abadie K, Clark EC, Valanparambil RM, Ukogu O, Yang W, Daza RM, Ng KKH, Fathima J, Wang AL, Lee J, Nasti TH, Bhandoola A, Nourmohammad A, Ahmed R, Shendure J, Cao J, Kueh HY. Reversible, tunable epigenetic silencing of TCF1 generates flexibility in the T cell memory decision. Immunity 2024; 57:271-286.e13. [PMID: 38301652 PMCID: PMC10922671 DOI: 10.1016/j.immuni.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 10/09/2023] [Accepted: 12/07/2023] [Indexed: 02/03/2024]
Abstract
The immune system encodes information about the severity of a pathogenic threat in the quantity and type of memory cells it forms. This encoding emerges from lymphocyte decisions to maintain or lose self-renewal and memory potential during a challenge. By tracking CD8+ T cells at the single-cell and clonal lineage level using time-resolved transcriptomics, quantitative live imaging, and an acute infection model, we find that T cells will maintain or lose memory potential early after antigen recognition. However, following pathogen clearance, T cells may regain memory potential if initially lost. Mechanistically, this flexibility is implemented by a stochastic cis-epigenetic switch that tunably and reversibly silences the memory regulator, TCF1, in response to stimulation. Mathematical modeling shows how this flexibility allows memory T cell numbers to scale robustly with pathogen virulence and immune response magnitudes. We propose that flexibility and stochasticity in cellular decisions ensure optimal immune responses against diverse threats.
Collapse
Affiliation(s)
- Kathleen Abadie
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Elisa C Clark
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Rajesh M Valanparambil
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Obinna Ukogu
- Department of Applied Mathematics, University of Washington, Seattle, WA 98105, USA
| | - Wei Yang
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
| | - Riza M Daza
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
| | - Kenneth K H Ng
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Jumana Fathima
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Allan L Wang
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Judong Lee
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Tahseen H Nasti
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Avinash Bhandoola
- T-Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, National Institute of Health, Bethesda, MD 20892, USA
| | - Armita Nourmohammad
- Department of Applied Mathematics, University of Washington, Seattle, WA 98105, USA; Department of Physics, University of Washington, Seattle, WA 98105, USA; Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Rafi Ahmed
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Jay Shendure
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA; Brotman Baty Institute for Precision Medicine, Seattle, WA 98195, USA; Allen Discovery Center for Cell Lineage Tracing, Seattle, WA 98109, USA; Howard Hughes Medical Institute, Seattle, WA 98195, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA.
| | - Junyue Cao
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA; Laboratory of Single-Cell Genomics and Population Dynamics, The Rockefeller University, New York, NY 10065, USA.
| | - Hao Yuan Kueh
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA.
| |
Collapse
|
3
|
McManus DT, Valanparambil RM, Medina CB, Hu Y, Scharer CD, Sobierajska E, Chang DY, Wieland A, Lee J, Nasti TH, Hashimoto M, Ross JL, Prokhnevska N, Cardenas MA, Gill AL, Clark EC, Abadie K, Kueh HY, Kaye J, Au-Yeung BB, Kissick HT, Ahmed R. Early generation of a precursor CD8 T cell that can adapt to acute or chronic viral infection. Res Sq 2024:rs.3.rs-3922168. [PMID: 38410458 PMCID: PMC10896375 DOI: 10.21203/rs.3.rs-3922168/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Virus specific PD-1+ TCF-1+ TOX+ stem-like CD8+ T cells are essential for maintaining T cell responses during chronic infection and are also critical for PD-1 directed immunotherapy. In this study we have used the mouse model of chronic LCMV infection to examine when these virus specific stem-like CD8+ T cells are generated during the course of chronic infection and what is the role of antigen in maintaining the stem-like program. We found that these stem-like CD8+ T cells are generated early (day 5) during chronic infection and that antigen is essential for maintaining their stem-like program. This early generation of stem-like CD8+ T cells suggested that the fate commitment to this cell population was agnostic to the eventual outcome of infection and the immune system prepares a priori for a potential chronic infection. Indeed, we found that an identical virus specific stem-cell like CD8+ T cell population was also generated during acute LCMV infection but these cells were lost once the virus was cleared. To determine the fate of these early PD-1+TCF-1+TOX+ stem-like CD8+ T cells that are generated during both acute and chronic LCMV infection we set up two reciprocal adoptive transfer experiments. In the first experiment we transferred day 5 stem-like CD8+ T cells from chronically infected into acutely infected mice and examined their differentiation after viral clearance. We found that these early stem-like CD8+ T cells downregulated canonical markers of the chronic stem-like CD8+ T cells and expressed markers (CD127 and CD62L) associated with central memory CD8+ T cells. In the second experiment, we transferred day 5 stem-like cells from acutely infected mice into chronically infected mice and found that these CD8+ T cells could function like resource cells after transfer into a chronic environment by generating effector CD8+ T cells in both lymphoid and non-lymphoid tissues while also maintaining the number of stem-like CD8+ T cells. These findings provide insight into the generation and maintenance of virus specific stem-like CD8+ T cells that play a critical role in chronic viral infection. In particular, our study highlights the early generation of stem-like CD8+ T cells and their ability to adapt to either an acute or chronic infection. These findings are of broad significance since these novel stem-like CD8+ T cells play an important role in not only viral infections but also in cancer and autoimmunity.
Collapse
Affiliation(s)
- Daniel T. McManus
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
- These authors contributed equally
| | - Rajesh M. Valanparambil
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
- These authors contributed equally
| | - Christopher B. Medina
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Yinghong Hu
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Christopher D. Scharer
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Ewelina Sobierajska
- Department of Urology, Emory University School of Medicine, Atlanta, GA, USA
| | - Daniel Y. Chang
- Department of Pathology, Mass General Brigham, Harvard Medical School, Boston, MA, USA
| | - Andreas Wieland
- Department of Otolaryngology, The Ohio State University College of Medicine, Columbus, OH
| | - Judong Lee
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Tahseen H. Nasti
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Masao Hashimoto
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - James L. Ross
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Nataliya Prokhnevska
- The Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Maria A. Cardenas
- Department of Urology, Emory University School of Medicine, Atlanta, GA, USA
| | - Amanda L. Gill
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Elisa C. Clark
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Kathleen Abadie
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Hao Yuan Kueh
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Jonathan Kaye
- Research Division of Immunology, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Byron B. Au-Yeung
- Division of Immunology, Lowance Center for Human Immunology, Department of Medicine, Emory University, Atlanta, GA
| | - Haydn T. Kissick
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
- Department of Urology, Emory University School of Medicine, Atlanta, GA, USA
| | - Rafi Ahmed
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
| |
Collapse
|
4
|
Valanparambil RM, Lai L, Johns MA, Davis-Gardner M, Linderman SL, McPherson TO, Chang A, Akhtar A, Gamarra ELB, Matia H, McCook-Veal AA, Switchenko J, Nasti TH, Green F, Saini M, Wieland A, Pinsky BA, Solis D, Dhodapkar MV, Carlisle J, Ramalingam S, Ahmed R, Suthar MS. BA.5 bivalent booster vaccination enhances neutralization of XBB.1.5, XBB.1.16 and XBB.1.9 variants in patients with lung cancer. NPJ Vaccines 2023; 8:179. [PMID: 37990024 PMCID: PMC10663480 DOI: 10.1038/s41541-023-00779-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 11/09/2023] [Indexed: 11/23/2023] Open
Abstract
This study reports that most patients with NSCLC had a significant increase in the nAb response to the currently circulating Omicron variants after bivalent booster vaccination and had Ab titers comparable to healthy participants. Interestingly, though the durability of the nAb response persisted in most of the healthy participants, patients with NSCLC had significantly reduced nAb titers after 4-6 months of vaccination. Our data highlight the importance of COVID-19 bivalent booster vaccination as the standard of care for patients with NSCLC given the evolution of new variants of concern.
Collapse
Affiliation(s)
- Rajesh M Valanparambil
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Lilin Lai
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Pediatrics, Emory University, Atlanta, GA, USA
- Emory National Primate Center, Atlanta, GA, USA
| | | | - Meredith Davis-Gardner
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Pediatrics, Emory University, Atlanta, GA, USA
- Emory National Primate Center, Atlanta, GA, USA
| | - Susanne L Linderman
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Tarrant Oliver McPherson
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, USA
- Biostatistics Shared Resource, Winship Cancer Institute, Emory University, Atlanta, USA
| | - Andres Chang
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA, USA
| | - Akil Akhtar
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Estefany L Bocangel Gamarra
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Hayley Matia
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Ashley A McCook-Veal
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, USA
- Biostatistics Shared Resource, Winship Cancer Institute, Emory University, Atlanta, USA
| | - Jeffrey Switchenko
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, USA
- Biostatistics Shared Resource, Winship Cancer Institute, Emory University, Atlanta, USA
| | - Tahseen H Nasti
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Felicia Green
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Manpreet Saini
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Andreas Wieland
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
- Department of Otolaryngology, The Ohio State University, Columbus, OH, USA
- Pelotonia Institute for Immuno-Oncology, The Ohio State University, Columbus, OH, USA
| | - Benjamin A Pinsky
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Daniel Solis
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Madhav V Dhodapkar
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA, USA
| | | | | | - Rafi Ahmed
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA
| | - Mehul S Suthar
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA.
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, USA.
- Department of Pediatrics, Emory University, Atlanta, GA, USA.
- Emory National Primate Center, Atlanta, GA, USA.
| |
Collapse
|
5
|
Im SJ, Obeng RC, Nasti TH, McManus D, Kamphorst AO, Gunisetty S, Prokhnevska N, Carlisle JW, Yu K, Sica GL, Cardozo LE, Gonçalves ANA, Kissick HT, Nakaya HI, Ramalingam SS, Ahmed R. Characteristics and anatomic location of PD-1 +TCF1 + stem-like CD8 T cells in chronic viral infection and cancer. Proc Natl Acad Sci U S A 2023; 120:e2221985120. [PMID: 37782797 PMCID: PMC10576122 DOI: 10.1073/pnas.2221985120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 08/31/2023] [Indexed: 10/04/2023] Open
Abstract
CD8 T cells play an essential role in antitumor immunity and chronic viral infections. Recent findings have delineated the differentiation pathway of CD8 T cells in accordance with the progenitor-progeny relationship of TCF1+ stem-like and Tim-3+TCF1- more differentiated T cells. Here, we investigated the characteristics of stem-like and differentiated CD8 T cells isolated from several murine tumor models and human lung cancer samples in terms of phenotypic and transcriptional features as well as their location compared to virus-specific CD8 T cells in the chronically lymphocytic choriomeningitis virus (LCMV)-infected mice. We found that CD8 tumor-infiltrating lymphocytes (TILs) in both murine and human tumors exhibited overall similar phenotypic and transcriptional characteristics compared to corresponding subsets in the spleen of chronically infected mice. Moreover, stem-like CD8 TILs exclusively responded and produced effector-like progeny CD8 T cells in vivo after antigenic restimulation, confirming their lineage relationship and the proliferative potential of stem-like CD8 TILs. Most importantly, similar to the preferential localization of PD-1+ stem-like CD8 T cells in T cell zones of the spleen during chronic LCMV infection, we found that the PD-1+ stem-like CD8 TILs in lung cancer samples are preferentially located not in the tumor parenchyma but in tertiary lymphoid structures (TLSs). The stem-like CD8 T cells are present in TLSs located within and at the periphery of the tumor, as well as in TLSs closely adjacent to the tumor parenchyma. These findings suggest that TLSs provide a protective niche to support the quiescence and maintenance of stem-like CD8 T cells in the tumor.
Collapse
Affiliation(s)
- Se Jin Im
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA30322
- Department of Immunology, Sungkyunkwan University School of Medicine, Suwon16419, Republic of Korea
| | - Rebecca C. Obeng
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA30322
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA30322
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH44106
| | - Tahseen H. Nasti
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA30322
| | - Daniel McManus
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA30322
| | - Alice O. Kamphorst
- Department of Immunology and Immunotherapy, Lipschultz Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY10029
- Department of Oncological Sciences, Lipschultz Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY10029
| | - Sivaram Gunisetty
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA30322
| | - Nataliya Prokhnevska
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Urology, Emory University School of Medicine, Atlanta, GA30322
| | - Jennifer W. Carlisle
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA30322
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA30322
| | - Ke Yu
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA30322
| | - Gabriel L. Sica
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA30322
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA30322
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA15213
| | | | | | - Haydn T. Kissick
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Urology, Emory University School of Medicine, Atlanta, GA30322
| | | | - Suresh S. Ramalingam
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA30322
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA30322
| | - Rafi Ahmed
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA30322
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA30322
| |
Collapse
|
6
|
Valanparambil RM, Carlisle J, Linderman SL, Akthar A, Millett RL, Lai L, Chang A, McCook-Veal AA, Switchenko J, Nasti TH, Saini M, Wieland A, Manning KE, Ellis M, Moore KM, Foster SL, Floyd K, Davis-Gardner ME, Edara VV, Patel M, Steur C, Nooka AK, Green F, Johns MA, O'Brein F, Shanmugasundaram U, Zarnitsyna VI, Ahmed H, Nyhoff LE, Mantus G, Garett M, Edupuganti S, Behra M, Antia R, Wrammert J, Suthar MS, Dhodapkar MV, Ramalingam S, Ahmed R. Antibody Response to COVID-19 mRNA Vaccine in Patients With Lung Cancer After Primary Immunization and Booster: Reactivity to the SARS-CoV-2 WT Virus and Omicron Variant. J Clin Oncol 2022; 40:3808-3816. [PMID: 35759727 PMCID: PMC9671759 DOI: 10.1200/jco.21.02986] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 03/15/2022] [Accepted: 04/27/2022] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To examine COVID-19 mRNA vaccine-induced binding and neutralizing antibody responses in patients with non-small-cell lung cancer (NSCLC) to SARS-CoV-2 614D (wild type [WT]) strain and variants of concern after the primary 2-dose and booster vaccination. METHODS Eighty-two patients with NSCLC and 53 healthy volunteers who received SARS-CoV-2 mRNA vaccines were included in the study. Blood was collected longitudinally, and SARS-CoV-2-specific binding and neutralizing antibody responses were evaluated by Meso Scale Discovery assay and live virus Focus Reduction Neutralization Assay, respectively. RESULTS A majority of patients with NSCLC generated binding and neutralizing antibody titers comparable with the healthy vaccinees after mRNA vaccination, but a subset of patients with NSCLC (25%) made poor responses, resulting in overall lower (six- to seven-fold) titers compared with the healthy cohort (P = < .0001). Although patients age > 70 years had lower immunoglobulin G titers (P = < .01), patients receiving programmed death-1 monotherapy, chemotherapy, or a combination of both did not have a significant impact on the antibody response. Neutralizing antibody titers to the B.1.617.2 (Delta), B.1.351 (Beta), and in particular, B.1.1.529 (Omicron) variants were significantly lower (P = < .0001) compared with the 614D (WT) strain. Booster vaccination led to a significant increase (P = .0001) in the binding and neutralizing antibody titers to the WT and Omicron variant. However, 2-4 months after the booster, we observed a five- to seven-fold decrease in neutralizing titers to WT and Omicron viruses. CONCLUSION A subset of patients with NSCLC responded poorly to the SARS-CoV-2 mRNA vaccination and had low neutralizing antibodies to the B.1.1.529 Omicron variant. Booster vaccination increased binding and neutralizing antibody titers to Omicron, but antibody titers declined after 3 months. These data highlight the concern for patients with cancer given the rapid spread of SARS-CoV-2 Omicron variant.
Collapse
Affiliation(s)
- Rajesh M. Valanparambil
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
| | | | - Susanne L. Linderman
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
| | - Akil Akthar
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
| | | | - Lilin Lai
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Andres Chang
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
- Winship Cancer Institute, Atlanta, GA
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA
| | - Ashley A. McCook-Veal
- Biostatistics Shared Resource, Winship Cancer Institute, Emory University, Atlanta, GA
| | - Jeffrey Switchenko
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA
| | - Tahseen H. Nasti
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
| | - Manpreet Saini
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
- ICGEB-Emory Vaccine Centre, International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, India
| | - Andreas Wieland
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
- Department of Otolaryngology, The Ohio State University, Columbus, OH
- Pelotonia Institute for Immuno-Oncology, The Ohio State University, Columbus, OH
| | - Kelly E. Manning
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Madison Ellis
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Kathryn M. Moore
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Stephanie L. Foster
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Katharine Floyd
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Meredith E. Davis-Gardner
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Venkata-Viswanadh Edara
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Mit Patel
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Conor Steur
- Winship Cancer Institute, Atlanta, GA
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA
| | - Ajay K. Nooka
- Winship Cancer Institute, Atlanta, GA
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA
| | | | | | | | - Uma Shanmugasundaram
- Winship Cancer Institute, Atlanta, GA
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA
| | - Veronika I. Zarnitsyna
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Biology, Emory University, Atlanta, GA
| | - Hasan Ahmed
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Biology, Emory University, Atlanta, GA
| | - Lindsay E. Nyhoff
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Pediatrics, Emory University, Atlanta, GA
| | - Grace Mantus
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Pediatrics, Emory University, Atlanta, GA
| | - Michael Garett
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
- Hope Clinic of Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
| | - Srilatha Edupuganti
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
- Hope Clinic of Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
| | | | - Rustom Antia
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Biology, Emory University, Atlanta, GA
| | - Jens Wrammert
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Pediatrics, Emory University, Atlanta, GA
| | - Mehul S. Suthar
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Center, Atlanta, GA
- Center for Childhood Infections and Vaccines of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Madhav V. Dhodapkar
- Winship Cancer Institute, Atlanta, GA
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA
| | | | - Rafi Ahmed
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA
- Department of Microbiology and Immunology, Emory University, Atlanta, GA
| |
Collapse
|
7
|
Hess CB, Eng TY, Nasti TH, Dhere VR, Kleber TJ, Switchenko JM, Weinberg BD, Rouphael N, Tian S, Rudra S, Taverna LS, Daisson AP, Ahmed R, Khan MK. Whole-lung low-dose radiation therapy (LD-RT) for non-intubated oxygen-dependent patients with COVID-19-related pneumonia receiving dexamethasone and/or remdesevir. Radiother Oncol 2021; 165:20-31. [PMID: 34653525 PMCID: PMC8511870 DOI: 10.1016/j.radonc.2021.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/30/2021] [Accepted: 10/03/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND Low-dose radiotherapy (LD-RT) has produced anti-inflammatory effects in both animal models and early human trials of COVID-19-related pneumonia. The role of whole-lung LD-RT within existing treatment paradigms merits further study. METHODS A phase II prospective trial studied the addition of LD-RT to standard drug treatments. Hospitalized and oxygen-dependent patients receiving dexamethasone and/or remdesevir were treated with 1.5 Gy whole-lung LD-RT and compared to a blindly-matched contemporaneous control cohort. RESULTS Of 40 patients evaluated, 20 received drug therapy combined with whole-lung LD-RT and 20 without LD-RT. Intubation rates were 14% with LD-RT compared to 32% without (p = 0.09). Intubation-free survival was 77% vs. 68% (p = 0.17). Biomarkers of inflammation (C-reactive protein, p = 0.02) and cardiac injury (creatine kinase, p < 0.01) declined following LD-RT compared to controls. Mean time febrile was 1.4 vs 3.3 days, respectively (p = 0.14). Significant differences in clinical recovery (7.5 vs. 7 days, p = 0.37) and radiographic improvement (p = 0.72) were not detected. On subset analysis, CRP decline following LD-RT was predictive of recovery without intubation compared to controls (0% vs. 31%, p = 0.04), freedom from prolonged hospitalizations (21+ days) (0% vs. 31%, p = 0.04), and decline in oxygenation burden (56% reduction, p = 0.06). CRP decline following 1st drug therapy was not similarly predictive of outcome in controls (p = 0.36). CONCLUSIONS Adding LD-RT to standard drug treatments reduced biomarkers of inflammation and cardiac injury in COVID-19 patients and may have reduced intubation. Durable CRP decline following LD-RT predicted especially favorable recovery, freedom from intubation, reduction in prolonged hospitalization, and reduced oxygenation burden. A confirmatory randomized trial is now ongoing. CLINICAL TRIAL REGISTRATION NCT04366791.
Collapse
Affiliation(s)
- Clayton B Hess
- Department/Division of Radiation Oncology, Emory University, Atlanta, United States; Department/Division of Microbiology and Immunology, Emory University, Atlanta, United States
| | - Tony Y Eng
- Department/Division of Radiation Oncology, Emory University, Atlanta, United States; Winship Cancer Institute, Emory University, Atlanta, United States
| | - Tahseen H Nasti
- Department/Division of Microbiology and Immunology, Emory University, Atlanta, United States
| | - Vishal R Dhere
- Department/Division of Radiation Oncology, Emory University, Atlanta, United States; Winship Cancer Institute, Emory University, Atlanta, United States
| | - Troy J Kleber
- School of Medicine, Emory University, Atlanta, United States
| | - Jeffrey M Switchenko
- School of Biostatistics and Bioinformatics, Emory University, Atlanta, United States; Winship Cancer Institute, Emory University, Atlanta, United States
| | | | - Nadine Rouphael
- School of Infectious Disease, Emory University, Atlanta, United States
| | - Sibo Tian
- Department/Division of Radiation Oncology, Emory University, Atlanta, United States; Winship Cancer Institute, Emory University, Atlanta, United States
| | - Soumon Rudra
- Department/Division of Radiation Oncology, Emory University, Atlanta, United States; Winship Cancer Institute, Emory University, Atlanta, United States
| | - Luisa S Taverna
- Undergraduate Scholarly Inquiry and Research Experience (SIRE), Emory University, Atlanta, United States
| | - Alvaro Perez Daisson
- Undergraduate Scholarly Inquiry and Research Experience (SIRE), Emory University, Atlanta, United States
| | - Rafi Ahmed
- Department/Division of Microbiology and Immunology, Emory University, Atlanta, United States
| | - Mohammad K Khan
- Department/Division of Radiation Oncology, Emory University, Atlanta, United States; School of Medicine, Emory University, Atlanta, United States; Winship Cancer Institute, Emory University, Atlanta, United States.
| |
Collapse
|
8
|
Ahmad I, Nasti TH, Rihan HM, Jimenez H, Elmets CA, Yusuf N. Toll-like receptor-4 deficiency inhibits ultraviolet radiation-induced tumor development by modulation of immune and inflammatory responses. Mol Carcinog 2020; 60:60-70. [PMID: 33283918 DOI: 10.1002/mc.23271] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/29/2020] [Accepted: 11/09/2020] [Indexed: 12/19/2022]
Abstract
Ultraviolet (UV) B irradiation of the skin induces acute inflammation, as characterized by erythema, edema, and immunosuppression, and is subsequently linked to the progression of skin cancer. Toll-like receptor 4 (TLR4), a component of innate immunity, has been shown to play an important role in cancer. To elucidate the role of TLR4 in UVB-induced tumor development, TLR4-proficient (C3H/HeN) and TLR4-deficient (C3H/HeJ) mice were exposed to multiple doses of UVB radiation (200 mJ/cm2 ) for 40 weeks. Photocarcinogenesis was retarded in terms of tumor incidence, and tumor latency, in mice deficient in TLR4 compared with TLR4-proficient mice, whereas significantly greater numbers of tumors occurred in TLR4-proficient mice. There was significant upregulation of inflammatory markers like COX-2, PGE2 , S100A8, and S100A9 in the skin of TLR4-proficient mice than the skin of TLR4-deficient mice. Furthermore, we found that TLR4-proficient mice had a significantly higher number of Gr1+CD11b+ myeloid cells CD4+CD25+ regulatory T-cells than TLR4-deficient mice. Furthermore, the levels of interferon (IFN)-γ cytokine was increased and the levels of interleukin (IL)-4, IL-10, and IL-17 cytokines were decreased in serum, skin, and tumor lysates of TLR4-deficient mice in comparison with samples from TLR4-proficient mice. Together, our data indicate that TLR4-mediated inflammation may cause suppression of antitumor responses and trigger the development of UVB-induced skin cancers. Thus, strategies to inhibit TLR4-mediated immune suppression may allow us to develop preventive and therapeutic approaches for the management of UVB-induced cutaneous tumors.
Collapse
Affiliation(s)
- Israr Ahmad
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Heba M Rihan
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Hugo Jimenez
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Craig A Elmets
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Veteran Affairs Medical Center, University of Alabama at Birmingham, Birmingham, Alabama, USA.,O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Nabiha Yusuf
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Veteran Affairs Medical Center, University of Alabama at Birmingham, Birmingham, Alabama, USA.,O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| |
Collapse
|
9
|
Nasti TH, Yusuf N, Sherwani MA, Athar M, Timares L, Elmets CA. Regulatory T Cells Play an Important Role in the Prevention of Murine Melanocytic Nevi and Melanomas. Cancer Prev Res (Phila) 2020; 14:165-174. [PMID: 33148679 DOI: 10.1158/1940-6207.capr-20-0360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/26/2020] [Accepted: 10/28/2020] [Indexed: 11/16/2022]
Abstract
Melanocytic nevi are benign proliferations of pigment cells that can occasionally develop into melanomas. There is a significant correlation between increased nevus numbers and melanoma development. Our previous reports revealed that 7,12-dimethylbenz(a)anthracene (DMBA) and 12-O-tetradecanoyl-phorbol-13-acetate (TPA) induced dysplastic nevi in C3H/HeN mice, with a potential to transform into melanomas. To understand the immune mechanisms behind this transformation, we applied increasing DMBA doses followed by TPA to the skin of C3H/HeN mice. We observed that increased doses of DMBA correlated well with increased numbers of nevi. The increased DMBA dose induced diminished immune responses and promoted the expansion of regulatory T cells (Treg) that resulted in increased IL10 and reduced IFNγ levels. Mice with increased nevus numbers had loss of p16 expression. These mice had increased migration of melanocytic cells to lymph nodes (LN) and a greater percent of LNs produced immortalized melanocytic cell lines. DMBA-induced immunosuppression was lost in CD4-knockout (KO) mice. Lymphocytes in the CD4KO mice produced less IL10 than CD8KO mice. Furthermore, CD4KO mice had significantly reduced nevus numbers and size compared with wild-type and CD8KO mice. These results suggest that Tregs play a vital role in the incidence of nevi and their progression to melanoma.Prevention Relevance: There has been little progress in developing novel strategies for preventing premalignant dysplastic nevi from becoming melanomas. In this study in mice, regulatory-T cells enhanced progression of benign nevi to malignant melanomas; and by inhibiting their activity, melanomas could be retarded. The findings identify new possibilities for melanoma prevention in high risk individuals.
Collapse
MESH Headings
- 9,10-Dimethyl-1,2-benzanthracene/administration & dosage
- 9,10-Dimethyl-1,2-benzanthracene/toxicity
- Animals
- CD4 Antigens/genetics
- CD8 Antigens/genetics
- Female
- Humans
- Immune Tolerance/drug effects
- Male
- Melanoma, Experimental/chemically induced
- Melanoma, Experimental/immunology
- Melanoma, Experimental/pathology
- Mice
- Mice, Knockout
- Nevus, Pigmented/chemically induced
- Nevus, Pigmented/immunology
- Nevus, Pigmented/pathology
- Skin/drug effects
- Skin/immunology
- Skin/pathology
- Skin Neoplasms/chemically induced
- Skin Neoplasms/immunology
- Skin Neoplasms/pathology
- T-Lymphocytes, Regulatory/immunology
- Tetradecanoylphorbol Acetate/administration & dosage
- Tetradecanoylphorbol Acetate/toxicity
Collapse
Affiliation(s)
- Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Nabiha Yusuf
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
- The Birmingham VA Medical Center, Birmingham, Alabama
| | | | - Mohammad Athar
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Laura Timares
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Craig A Elmets
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama.
- The Birmingham VA Medical Center, Birmingham, Alabama
| |
Collapse
|
10
|
Pomeranz Krummel DA, Nasti TH, Kaluzova M, Kallay L, Bhattacharya D, Melms JC, Izar B, Xu M, Burnham A, Ahmed T, Li G, Lawson D, Kowalski J, Cao Y, Switchenko JM, Ionascu D, Cook JM, Medvedovic M, Jenkins A, Khan MK, Sengupta S. Melanoma Cell Intrinsic GABA A Receptor Enhancement Potentiates Radiation and Immune Checkpoint Inhibitor Response by Promoting Direct and T Cell-Mediated Antitumor Activity. Int J Radiat Oncol Biol Phys 2020; 109:1040-1053. [PMID: 33289666 DOI: 10.1016/j.ijrobp.2020.10.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/14/2020] [Accepted: 10/19/2020] [Indexed: 12/17/2022]
Abstract
PURPOSE Most patients with metastatic melanoma show variable responses to radiation therapy and do not benefit from immune checkpoint inhibitors. Improved strategies for combination therapy that leverage potential benefits from radiation therapy and immune checkpoint inhibitors are critical. METHODS AND MATERIALS We analyzed metastatic melanoma tumors in the TCGA cohort for expression of genes coding for subunits of type A γ-aminobutyric acid (GABA) receptor (GABAAR), a chloride ion channel and major inhibitory neurotransmitter receptor. Electrophysiology was used to determine whether melanoma cells possess intrinsic GABAAR activity. Melanoma cell viability studies were conducted to test whether enhancing GABAAR mediated chloride transport using benzodiazepine-impaired viability. A syngeneic melanoma mouse model was used to assay the effect of benzodiazepine on tumor volume and its ability to potentiate radiation therapy or immunotherapy. Treated tumors were analyzed for changes in gene expression by RNA sequencing and presence of tumor-infiltrating lymphocytes by flow cytometry. RESULTS Genes coding for subunits of GABAARs express functional GABAARs in melanoma cells. By enhancing GABAAR-mediated anion transport, benzodiazepines depolarize melanoma cells and impair their viability. In vivo, benzodiazepine alone reduces tumor growth and potentiates radiation therapy and α-PD-L1 antitumor activity. The combination of benzodiazepine, radiation therapy, and α-PD-L1 results in near complete regression of treated tumors and a potent abscopal effect, mediated by increased infiltration of polyfunctional CD8+ T cells. Treated tumors show expression of cytokine-cytokine receptor interactions and overrepresentation of p53 signaling. CONCLUSIONS This study identifies an antitumor strategy combining radiation and/or an immune checkpoint inhibitor with modulation of GABAARs in melanoma using benzodiazepine.
Collapse
Affiliation(s)
- Daniel A Pomeranz Krummel
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Tahseen H Nasti
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
| | | | - Laura Kallay
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Debanjan Bhattacharya
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Johannes C Melms
- Columbia Center for Translational Immunology, Columbia University College of Physicians and Surgeons, New York, New York
| | - Benjamin Izar
- Columbia Center for Translational Immunology, Columbia University College of Physicians and Surgeons, New York, New York
| | - Maxwell Xu
- Johns Hopkins University, Baltimore, Maryland
| | - Andre Burnham
- Emory University School of Medicine, Atlanta, Georgia
| | - Taukir Ahmed
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Guanguan Li
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - David Lawson
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Jeanne Kowalski
- Department of Oncology, LIVESTRONG Cancer Institutes, Dell Medical School, University of Texas, Austin, Texas
| | - Yichun Cao
- Biostatistics Shared Resource, Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Jeffrey M Switchenko
- Biostatistics Shared Resource, Winship Cancer Institute of Emory University, Atlanta, Georgia; Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - Dan Ionascu
- Department of Radiation Oncology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - James M Cook
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Mario Medvedovic
- Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Andrew Jenkins
- Departments of Anesthesiology, Pharmacology and Chemical Biology, Emory University School of Medicine, Atlanta, Georgia
| | - Mohammad K Khan
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Soma Sengupta
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio.
| |
Collapse
|
11
|
Buchwald ZS, Nasti TH, Lee J, Eberhardt CS, Wieland A, Im SJ, Lawson D, Curran W, Ahmed R, Khan MK. Tumor-draining lymph node is important for a robust abscopal effect stimulated by radiotherapy. J Immunother Cancer 2020; 8:jitc-2020-000867. [PMID: 33028691 PMCID: PMC7542667 DOI: 10.1136/jitc-2020-000867] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2020] [Indexed: 11/13/2022] Open
Abstract
Background Radiotherapy (RT) has been shown to stimulate an antitumor immune response in irradiated tumors as well as unirradiated distant sites (abscopal effect). Previous studies have demonstrated a role for the tumor-draining lymph node (LN) in mediating an anti-programmed death-1 (PD-1)/programmed death ligand-1 (PD-L1) stimulated antitumor immune response. Here, we investigated whether the LN is also important in mediating a RT alone stimulated abscopal response. Methods We used a subcutaneous modified B16F10 flank tumor model injected bilaterally. Our B16F10 cell line has an inserted viral glycoprotein which facilitated identification of tumor-specific T-cells. RT was directed at one flank tumor alone or one flank tumor and the tumor-draining LN. We evaluated response by tumor growth measurements and flow cytometry of both tumor-infiltrating and LN T-cells. Results We show that local tumor irradiation improves distant tumor control (abscopal effect). Depletion of CD8+ T-cells significantly reduced this abscopal response. We have previously shown, in a chronic lymphocytic choriomeningitis virus (LCMV) infection, that the T-cell proliferative burst following blockade of PD-1/L1 is provided by a ‘stem-like’ CD8+ T-cell subset which then differentiate into terminally differentiated effectors. These terminally differentiated effectors have the potential to kill virally infected or tumor cells following PD-1/L1 blockade. In the chronic LCMV infection, stem-like CD8+ T-cells were found exclusively in secondary lymphoid organs. Similarly, here we found these cells at high frequencies in the tumor-draining LN, but at low frequencies within the tumor. The effect of RT on this T-cell subset in unknown. Interestingly, tumor irradiation stimulated total CD8+ and stem-like CD8+ T-cell proliferation in the LN. When the LN and the tumor were then targeted with RT, the abscopal effect was reduced, and we found a concomitant reduction in the number of total tumor-specific CD8+ T-cells and stem-like CD8+ T-cells in both the irradiated and unirradiated tumor. Conclusions These correlative results suggest the tumor-draining LN may be an important mediator of the abscopal effect by serving as a stem-like CD8+ T-cell reservoir, a site for stem-like T-cell expansion, and a site from which they can populate the tumor.
Collapse
Affiliation(s)
- Zachary S Buchwald
- Department of Radiation Oncology, Emory University, Atlanta, Georgia, USA.,Emory Vaccine Center, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Tahseen H Nasti
- Emory Vaccine Center, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Judong Lee
- Emory Vaccine Center, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Christiane S Eberhardt
- Emory Vaccine Center, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Andres Wieland
- Emory Vaccine Center, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Se Jin Im
- Emory Vaccine Center, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - David Lawson
- Department of Hematology and Oncology, Emory University, Atlanta, Georgia, USA
| | - Walter Curran
- Department of Radiation Oncology, Emory University, Atlanta, Georgia, USA
| | - Rafi Ahmed
- Emory Vaccine Center, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Mohammad K Khan
- Department of Radiation Oncology, Emory University, Atlanta, Georgia, USA
| |
Collapse
|
12
|
Hess CB, Buchwald ZS, Stokes W, Nasti TH, Switchenko JM, Weinberg BD, Steinberg JP, Godette KD, Murphy D, Ahmed R, Curran WJ, Khan MK. Low-dose whole-lung radiation for COVID-19 pneumonia: Planned day 7 interim analysis of a registered clinical trial. Cancer 2020; 126:5109-5113. [PMID: 32986274 DOI: 10.1002/cncr.33130] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/25/2020] [Accepted: 06/27/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND Individuals of advanced age with comorbidities face a higher risk of death from coronavirus disease 2019 (COVID-19), especially once they are ventilator-dependent. Respiratory decline in patients with COVID-19 is precipitated by a lung-mediated aberrant immune cytokine storm. Low-dose lung radiation was used to treat pneumonia in the pre-antibiotic era. Radiation immunomodulatory effects may improve outcomes for select patients with COVID-19. METHODS A single-institution trial evaluating the safety and efficacy of single-fraction, low-dose whole-lung radiation for patients with COVID-19 pneumonia is being performed for the first time. This report describes outcomes of a planned day 7 interim analysis. Eligible patients were hospitalized, had radiographic consolidation, required supplemental oxygen, and were clinically deteriorating. RESULTS Of 9 patients screened, 5 were treated with whole-lung radiation on April 24 until April 28 2020, and they were followed for a minimum of 7 days. The median age was 90 years (range, 64-94 years), and 4 were nursing home residents with multiple comorbidities. Within 24 hours of radiation, 3 patients (60%) were weaned from supplemental oxygen to ambient air, 4 (80%) exhibited radiographic improvement, and the median Glasgow Coma Scale score improved from 10 to 14. A fourth patient (80% overall recovery) was weaned from oxygen at hour 96. The mean time to clinical recovery was 35 hours. There were no acute toxicities. CONCLUSIONS In a pilot trial of 5 oxygen-dependent elderly patients with COVID-19 pneumonia, low-dose whole-lung radiation led to rapid improvements in clinical status, encephalopathy, and radiographic consolidation without acute toxicity. Low-dose whole-lung radiation appears to be safe, shows early promise of efficacy, and warrants further study. LAY SUMMARY Researchers at Emory University report preliminary safety outcomes for patients treated with low-dose lung irradiation for coronavirus disease 2019 (COVID-19) pneumonia. Five residents of nursing or group homes were hospitalized after testing positive for COVID-19. Each had pneumonia visible on a chest x-ray, required supplemental oxygen, and experienced a clinical decline in mental status or in work of breathing or a prolonged or escalating supplemental oxygen requirement. A single treatment of low-dose (1.5-Gy) radiation to both lungs was delivered over the course of 10 to 15 minutes. There was no acute toxicity attributable to radiation therapy. Within 24 hours, 4 patients had rapidly improved breathing, and they recovered to room air at an average of 1.5 days (range, 3-96 hours). Three were discharged at a mean time of 12 days, and 1 was preparing for discharge. Blood tests and repeat imaging confirm that low-dose whole-lung radiation treatment appears safe for COVID-19 pneumonia. Further trials are warranted.
Collapse
Affiliation(s)
- Clayton B Hess
- Department of Radiation Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Zachary S Buchwald
- Department of Radiation Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - William Stokes
- Department of Radiation Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Tahseen H Nasti
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia
| | - Jeffrey M Switchenko
- Winship Cancer Institute, Emory University, Atlanta, Georgia.,Department of Biostatistics and Bioinformatics, Emory University, Atlanta, Georgia
| | - Brent D Weinberg
- Department of Diagnostic Radiology, Emory University, Atlanta, Georgia
| | - James P Steinberg
- Department of Infectious Disease, Emory University, Atlanta, Georgia
| | - Karen D Godette
- Department of Radiation Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - David Murphy
- Department of Pulmonary Critical Care, Emory University, Atlanta, Georgia
| | - Rafi Ahmed
- Winship Cancer Institute, Emory University, Atlanta, Georgia.,Department of Microbiology and Immunology, Emory University, Atlanta, Georgia
| | - Walter J Curran
- Department of Radiation Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Mohammad K Khan
- Department of Radiation Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| |
Collapse
|
13
|
Jella KK, Nasti TH, Li Z, Lawson DH, Switchenko JM, Ahmed R, Dynan WS, Khan MK. Exosome-Containing Preparations From Postirradiated Mouse Melanoma Cells Delay Melanoma Growth In Vivo by a Natural Killer Cell-Dependent Mechanism. Int J Radiat Oncol Biol Phys 2020; 108:104-114. [PMID: 32561502 DOI: 10.1016/j.ijrobp.2020.06.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/21/2020] [Accepted: 06/08/2020] [Indexed: 12/14/2022]
Abstract
PURPOSE To investigate the ability of radiation to stimulate exosome release from melanoma cells and to characterize the resulting exosome-containing vesicle preparations for their ability to promote a host antitumor immune response. MATERIALS AND METHODS Cultured B16F10 murine melanoma cells or tumors were irradiated, and secreted extracellular vesicles were isolated and characterized. The exosome-containing vesicle preparations were injected into fresh tumors in syngeneic mice, and tumor growth and infiltrating T cells and natural killer (NK) cells were characterized. RESULTS Irradiation stimulated exosome release from B16F10 murine melanoma cells. Exosome preparations from irradiated cell culture supernatants were biologically active, as demonstrated by uptake into recipient cells and by the ability to induce dendritic cell maturation and activation in vitro. Intratumoral injection significantly delayed tumor growth in vivo, whereas injection of similar preparations from non irradiated cells had no effect. The antitumor effect was correlated to an increase in interferon gamma-producing tumor-infiltrating NK cells. Pretreatment of the host mice with anti-NK cell antibodies abolished the effect, whereas pretreatment with anti-CD8+ T-cell antibodies did not. CONCLUSION Exosomes from irradiated cells, or synthetic mimics, might provide an effective strategy for potentiation of NK cell-mediated host antitumor immunity.
Collapse
Affiliation(s)
- Kishore Kumar Jella
- Department of Radiation Oncology, Winship Cancer Institute, School of Medicine, Emory University, Atlanta, Georgia
| | - Tahseen H Nasti
- Department of Microbiology and Immunology, School of Medicine, Emory University, Atlanta, Georgia
| | - Zhentian Li
- Department of Radiation Oncology, Winship Cancer Institute, School of Medicine, Emory University, Atlanta, Georgia
| | - David H Lawson
- Department of Hematology and Medical Oncology, Winship Cancer Institute, School of Medicine, Emory University, Atlanta, Georgia
| | - Jeffrey M Switchenko
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - Rafi Ahmed
- Department of Microbiology and Immunology, School of Medicine, Emory University, Atlanta, Georgia
| | - William S Dynan
- Department of Radiation Oncology, Winship Cancer Institute, School of Medicine, Emory University, Atlanta, Georgia; Department of Biochemistry, School of Medicine, Emory University, Atlanta, Georgia
| | - Mohammad K Khan
- Department of Radiation Oncology, Winship Cancer Institute, School of Medicine, Emory University, Atlanta, Georgia.
| |
Collapse
|
14
|
Pomeranz Krummel DA, Nasti TH, Izar B, Press RH, Xu M, Lowder L, Kallay L, Rupji M, Rosen H, Su J, Curran W, Olson J, Weinberg B, Schniederjan M, Neill S, Lawson D, Kowalski J, Khan MK, Sengupta S. Impact of Sequencing Radiation Therapy and Immune Checkpoint Inhibitors in the Treatment of Melanoma Brain Metastases. Int J Radiat Oncol Biol Phys 2020; 108:157-163. [PMID: 32057994 DOI: 10.1016/j.ijrobp.2020.01.043] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 01/15/2020] [Accepted: 01/25/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE Melanoma brain metastases (MBM) occur in ∼50% of melanoma patients. Although both radiation therapy (RT) and immune checkpoint inhibitor (ICI) are used alone or in combination for MBM treatment, the role of this combination and how these treatments could best be sequenced remains unclear. METHODS AND MATERIALS We conducted a retrospective analysis of patients with resected MBM who underwent treatment with RT, ICI, or a combination of RT and ICI. Among the latter, we specifically investigated the differential gene expression via RNA-sequencing between patients who received RT first then ICI (RT → ICI) versus ICI first then RT (ICI → RT). We used a glycoprotein-transduced syngeneic melanoma mouse model for validation experiments. RESULTS We found that for patients with resected MBM, a combination of RT and ICI confers superior survival compared with RT alone. Specifically, we found that RT → ICI was superior compared with ICI → RT. Transcriptome analysis of resected MBM revealed that the RT → ICI cohort demonstrated deregulation of genes involved in apoptotic signaling and key modulators of inflammation that are most implicated in nuclear factor kappa-light-chain-enhancer of activated B cells signaling. In a preclinical model, we showed that RT followed by anti-programmed death-ligand 1 therapy was superior to the reverse sequence of therapy, supporting the observations we made in patients with MBM. CONCLUSIONS Our study provides initial insights into the optimal sequence of RT and ICI in the treatment of MBM after surgical resection. Prospective studies examining the best sequence of RT and ICI are necessary, and our study contributes to the rationale to pursue these.
Collapse
Affiliation(s)
| | - Tahseen H Nasti
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia
| | - Benjamin Izar
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York City, New York
| | - Robert H Press
- Department of Radiation Oncology, Emory University School of Medicine, Atlanta, Georgia
| | - Maxwell Xu
- Department of Neurology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Lindsey Lowder
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Laura Kallay
- Department of Neurology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Manali Rupji
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia
| | - Havi Rosen
- Department of Neurology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Jing Su
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Walter Curran
- Department of Radiation Oncology, Emory University School of Medicine, Atlanta, Georgia; Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia
| | - Jeffrey Olson
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia; Department of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia
| | - Brent Weinberg
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia
| | - Matthew Schniederjan
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Stewart Neill
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - David Lawson
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia; Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, Georgia
| | - Jeanne Kowalski
- Department of Oncology, LIVESTRONG Cancer Institutes, Dell Medical School, University of Texas, Austin, Texas
| | - Mohammad K Khan
- Department of Radiation Oncology, Emory University School of Medicine, Atlanta, Georgia; Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia.
| | - Soma Sengupta
- Department of Neurology, University of Cincinnati College of Medicine, Cincinnati, Ohio; University of Cincinnati Gardner Neuroscience Institute, Cincinnati, Ohio.
| |
Collapse
|
15
|
Buchwald ZS, Nasti TH, Eberhardt CS, Wieland A, Lawson D, Curran W, Ahmed R, Khan MK. Abstract 526: Tumor-draining lymph node irradiation reduces tumor-infiltrating stem-like CD8+T-cells and abrogates the abscopal effect. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose: PD-1 and PD-L1 antagonists are efficacious because cancer induces T-cell exhaustion via upregulation of PD-L1 and persistent antigen exposure. Our lab, has shown that the proliferative burst following αPD-L1 therapy of exhausted CD8+PD-1+T-cells is restricted to a “stem-like” CD8+T-cell subset in a murine chronic viral infection model. The role of these stem-like CD8+T-cells in malignancies and whether these cells respond to other immuno-stimulation including radiotherapy (RT) is unknown. RT’s immuno-stimulation includes acting as an in-situ vaccine by liberating cryptic tumor neo-antigens, generating a potent anti-tumor CD8+T-cell response, synergizing with αPD-1/L1 and leading to control at distant sites of disease outside the radiation field (abscopal effect). In initial studies, we found these stem-like CD8+T-cells in B16F10 tumors and at high frequencies in the tumor-draining lymph nodes (TDLN) of immunocompetent mice. Here, we investigated: (1) the impact of tumor-directed RT on this stem-like CD8+T-cell population in the tumor and TDLN in the context of an abscopal response, and (2) due to the high frequency of stem-like CD8+T-cells in the TDLN, whether depletion of lymphocytes from the TDLN via RT influenced the abscopal effect.
Experimental Design: We developed a preclinical model of oligo-metastatic melanoma to evaluate the role of stem-like CD8+ T-cells and the TDLN in the abscopal effect. This was done with unilateral tumor-directed RT with or without TDLN-directed RT. This was also done in the presence and absence of αPD-L1.
Results: Tumor-directed RT improved local tumor control and induced an abscopal response with a concomitant increase in tumor infiltrating tumor-specific stem-like CD8+T-cells. Tumor-specific stem-like CD8+T-cells were also observed in the TDLN of tumors on both sides. Importantly, the tumor-directed RT increased tumor-specific T-cell proliferation in the TDLNs bilaterally despite only being targeted at one tumor. Given this robust proliferative response and the high frequency of stem-like CD8+T-cells in the TDLN, we next evaluated the role of the TDLN in mediating the abscopal effect. We found that the abscopal effect is impaired if the TDLN is lymphocyte depleted with TDLN-directed RT in the presence or absence of αPD-L1. Additionally, the tumor-directed RT mediated increase in stem-like T-cells in the irradiated and unirradiated tumor was abrogated with TDLN-directed RT.
Conclusion: Our results demonstrate slowed distant tumor growth following irradiation of a local site and that this correlates with an increase in tumor-infiltrating stem-like CD8+T-cells which is reduced with TDLN-directed RT. These data suggest a critical role for both the stem-like CD8+T-cells and the TDLN in mediating the abscopal effect.
Citation Format: Zachary S. Buchwald, Tahseen H. Nasti, Christiane S. Eberhardt, Andreas Wieland, David Lawson, Walter Curran, Rafi Ahmed, Mohammad K. Khan. Tumor-draining lymph node irradiation reduces tumor-infiltrating stem-like CD8+T-cells and abrogates the abscopal effect [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 526.
Collapse
|
16
|
Buchwald ZS, Wynne J, Nasti TH, Zhu S, Mourad WF, Yan W, Gupta S, Khleif SN, Khan MK. Radiation, Immune Checkpoint Blockade and the Abscopal Effect: A Critical Review on Timing, Dose and Fractionation. Front Oncol 2018; 8:612. [PMID: 30619752 PMCID: PMC6306034 DOI: 10.3389/fonc.2018.00612] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 11/29/2018] [Indexed: 12/11/2022] Open
Abstract
The combination of radiation and immunotherapy is currently an exciting avenue of pre-clinical and clinical investigation. The synergy between these two treatment modalities has the potential to expand the role of radiation from a purely local therapy, to a role in advanced and metastatic disease. Tumor regression outside of the irradiated field, known as the abscopal effect, is a recognized phenomenon mediated by lymphocytes and enhanced by checkpoint blockade. In this review, we summarize the known mechanistic data behind the immunostimulatory effects of radiation and how this is enhanced by immunotherapy. We also provide pre-clinical data supporting specific radiation timing and optimal dose/fractionation for induction of a robust anti-tumor immune response with or without checkpoint blockade. Importantly, these data are placed in a larger context of understanding T-cell exhaustion and the impact of immunotherapy on this phenotype. We also include relevant pre-clinical studies done in non-tumor systems. We discuss the published clinical trials and briefly summarize salient case reports evaluating the abscopal effect. Much of the data discussed here remains at the preliminary stage, and a number of interesting avenues of research remain under investigation.
Collapse
Affiliation(s)
- Zachary S Buchwald
- Department of Radiation Oncology, Emory University, Atlanta, GA, United States.,Department of Microbiology and Immunology, Emory University, Atlanta, GA, United States
| | - Jacob Wynne
- Department of Radiation Oncology, Emory University, Atlanta, GA, United States
| | - Tahseen H Nasti
- Department of Microbiology and Immunology, Emory University, Atlanta, GA, United States
| | - Simeng Zhu
- Department of Radiation Oncology, Henry Ford Health System, Detroit, MI, United States
| | - Waleed F Mourad
- Erlanger UT Radiation Oncology, Chattanooga, TN, United States
| | - Weisi Yan
- Mitchell Cancer Institute, University of Southern Alabama, Mobile, AL, United States
| | - Seema Gupta
- Georgia Cancer Center, Augusta University, Augusta, GA, United States
| | - Samir N Khleif
- Georgia Cancer Center, Augusta University, Augusta, GA, United States
| | - Mohammad K Khan
- Department of Radiation Oncology, Emory University, Atlanta, GA, United States
| |
Collapse
|
17
|
Wieland A, Kamphorst AO, Adsay NV, Masor JJ, Sarmiento J, Nasti TH, Darko S, Douek DC, Xue Y, Curran WJ, Lawson DH, Ahmed R. T cell receptor sequencing of activated CD8 T cells in the blood identifies tumor-infiltrating clones that expand after PD-1 therapy and radiation in a melanoma patient. Cancer Immunol Immunother 2018; 67:1767-1776. [PMID: 30167863 PMCID: PMC6196100 DOI: 10.1007/s00262-018-2228-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 08/02/2018] [Indexed: 10/28/2022]
Abstract
PD-1-targeted therapy has dramatically changed advanced cancer treatment. However, many questions remain, including specificity of T cells activated by PD-1 therapy and how peripheral blood analysis correlates to effects at tumor sites. In this study, we utilized TCR sequencing to dissect the composition of peripheral blood CD8 T cells activated upon therapy, comparing it with tumor-infiltrating lymphocytes. We report on a nonagenarian melanoma patient who showed a prominent increase in peripheral blood Ki-67 + CD8 T cells following brain stereotactic radiation and anti-PD-1 immunotherapy. Proliferating CD8 T cells exhibited an effector-like phenotype with expression of CD38, HLA-DR and Granzyme B, as well as expression of the positive costimulatory molecules CD28 and CD27. TCR sequencing of peripheral blood CD8 T cells revealed a highly oligoclonal repertoire at baseline with one clonotype accounting for 30%. However, the majority of dominant clones-including a previously identified cytomegalovirus-reactive clone-did not expand following treatment. In contrast, expanding clones were present at low frequencies in the peripheral blood but were enriched in a previously resected liver metastasis. The patient has so far remained recurrence-free for 36 months, and several CD8 T cell clones that expanded after treatment were maintained at elevated levels for at least 8 months. Our data show that even in a nonagenarian individual with oligoclonal expansion of CD8 T cells, we can identify activation of tumor-infiltrating CD8 T cell clones in peripheral blood following anti-PD-1-based immunotherapies.
Collapse
Affiliation(s)
- Andreas Wieland
- Department of Microbiology and Immunology, Emory Vaccine Center, Winship Cancer Institute, Emory University School of Medicine, 1510 Clifton Road, Rm G209, Atlanta, GA, 30322, USA
| | - Alice O Kamphorst
- Department of Microbiology and Immunology, Emory Vaccine Center, Winship Cancer Institute, Emory University School of Medicine, 1510 Clifton Road, Rm G209, Atlanta, GA, 30322, USA
- Department of Oncological Sciences and Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - N Volkan Adsay
- Laboratory Medicine, Department of Pathology, Emory University School of Medicine, Atlanta, GA, 30322, USA
- Koç University Hospital, 34010, Istanbul, Turkey
| | - Jonathan J Masor
- Division of General Medicine and Geriatrics, Department of Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Juan Sarmiento
- Department of Surgery, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Tahseen H Nasti
- Department of Microbiology and Immunology, Emory Vaccine Center, Winship Cancer Institute, Emory University School of Medicine, 1510 Clifton Road, Rm G209, Atlanta, GA, 30322, USA
| | - Sam Darko
- Human Immunology Section, Vaccine Research Center, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Daniel C Douek
- Human Immunology Section, Vaccine Research Center, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Yue Xue
- Laboratory Medicine, Department of Pathology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Walter J Curran
- Department of Radiation Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - David H Lawson
- Department of Hematology and Medical Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, 30322, GA, USA
| | - Rafi Ahmed
- Department of Microbiology and Immunology, Emory Vaccine Center, Winship Cancer Institute, Emory University School of Medicine, 1510 Clifton Road, Rm G209, Atlanta, GA, 30322, USA.
| |
Collapse
|
18
|
Jella KK, Nasti TH, Li Z, Malla SR, Buchwald ZS, Khan MK. Exosomes, Their Biogenesis and Role in Inter-Cellular Communication, Tumor Microenvironment and Cancer Immunotherapy. Vaccines (Basel) 2018; 6:vaccines6040069. [PMID: 30261592 PMCID: PMC6313856 DOI: 10.3390/vaccines6040069] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 09/19/2018] [Accepted: 09/21/2018] [Indexed: 12/14/2022] Open
Abstract
Exosomes are extracellular vesicles ranging from 30 to 150 nm in diameter that contain molecular constituents of their host cells. They are released from different types of cells ranging from immune to tumor cells and play an important role in intercellular communication. Exosomes can be manipulated by altering their host cells and can be loaded with products of interest such as specific drugs, proteins, DNA and RNA species. Due to their small size and the unique composition of their lipid bilayer, exosomes are capable of reaching different cell types where they alter the pathophysiological conditions of the recipient cells. There is growing evidence that exosomes are used as vehicles that can modulate the immune system and play an important role in cancer progression. The cross communication between the tumors and the cells of the immune system has gained attention in various immunotherapeutic approaches for several cancer types. In this review, we discuss the exosome biogenesis, their role in inter-cellular communication, and their capacity to modulate the immune system as a part of future cancer immunotherapeutic approaches and their potential to serve as biomarkers of therapy response.
Collapse
Affiliation(s)
| | - Tahseen H Nasti
- Department of Microbiology and Immunology, Emory University, Atlanta, GA 30322, USA.
| | - Zhentian Li
- Department of Radiation Oncology, Emory University, Atlanta, GA 30322, USA.
| | - Sudarshan R Malla
- Division of Renal Medicine, Emory University, Atlanta, GA 30322, USA.
| | - Zachary S Buchwald
- Department of Radiation Oncology, Emory University, Atlanta, GA 30322, USA.
| | - Mohammad K Khan
- Department of Radiation Oncology, Emory University, Atlanta, GA 30322, USA.
| |
Collapse
|
19
|
Chang A, Nasti TH, Khan MK, Parashar S, Kaufman JL, Boise LH, Lonial S, Ahmed R, Nooka AK. Myocarditis With Radiotherapy and Immunotherapy in Multiple Myeloma. J Oncol Pract 2018; 14:561-564. [PMID: 30004825 DOI: 10.1200/jop.18.00208] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Andres Chang
- Emory University School of Medicine, Atlanta, GA
| | | | | | | | | | | | - Sagar Lonial
- Emory University School of Medicine, Atlanta, GA
| | - Rafi Ahmed
- Emory University School of Medicine, Atlanta, GA
| | - Ajay K Nooka
- Emory University School of Medicine, Atlanta, GA
| |
Collapse
|
20
|
Shiao JC, Bowers N, Nasti TH, Khosa F, Khan MK. 4-1BB (CD137) and radiation therapy: A case report and literature review. Adv Radiat Oncol 2017; 2:398-402. [PMID: 29114608 PMCID: PMC5605279 DOI: 10.1016/j.adro.2017.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 03/12/2017] [Accepted: 03/24/2017] [Indexed: 11/12/2022] Open
Affiliation(s)
- Jay C Shiao
- University of Texas Health Science Center San Antonio Radiation Oncology, San Antonio, Texas
| | - Nathan Bowers
- East Tennessee State University College of Medicine Radiation Oncology, Johnson City, Tennessee
| | - Tahseen H Nasti
- Emory University Immunology and Microbiology Department, Atlanta, Georgia
| | - Faisal Khosa
- University of British Columbia, Vancouver, British Columbia, Canada
| | | |
Collapse
|
21
|
Nasti TH, Cochran JB, Vachhani RV, McKay K, Tsuruta Y, Athar M, Timares L, Elmets CA. IL-23 Inhibits Melanoma Development by Augmenting DNA Repair and Modulating T Cell Subpopulations. J Immunol 2016; 198:950-961. [PMID: 28003381 DOI: 10.4049/jimmunol.1601455] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/16/2016] [Indexed: 01/22/2023]
Abstract
In animal models, IL-12 and IL-23 participate in the development of malignant neoplasms of keratinocytes. However, the role of these cytokines in pigmented lesion development and their progression to melanoma has received little attention. IL-12p35, IL-23p19, and IL-12/IL-23p40 knockout mice on a C3H/HeN background, subjected to a melanomagenesis protocol, demonstrated profound differences in susceptibility to nevus initiation, transformation, tumorigenicity, and metastatic potential. IL-23 was found to be essential for melanocyte homeostasis, whereas IL-12 supported nevus development. A direct action of IL-23 on primary melanocytes, shown to be IL-23R+, demonstrated that DNA repair of damaged melanocytes requires IL-23. Furthermore, IL-23 modulated the cutaneous microenvironment by limiting regulatory T cells and IFN-γ and inhibiting IL-10 production. Neutralizing Ab to IFN-γ, but not IL-17, inhibited nevus development (p < 0.01).
Collapse
Affiliation(s)
- Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - J Barry Cochran
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - Raj V Vachhani
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - Kristopher McKay
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - Yuko Tsuruta
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - Mohammad Athar
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - Laura Timares
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - Craig A Elmets
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and .,Birmingham Veterans Administration Medical Center, Birmingham, AL 35233
| |
Collapse
|
22
|
Im SJ, Hashimoto M, Gerner MY, Lee J, Kissick HT, Burger MC, Shan Q, Hale JS, Lee J, Nasti TH, Sharpe AH, Freeman GJ, Germain RN, Nakaya HI, Xue HH, Ahmed R. Defining CD8+ T cells that provide the proliferative burst after PD-1 therapy. Nature 2016; 537:417-421. [PMID: 27501248 PMCID: PMC5297183 DOI: 10.1038/nature19330] [Citation(s) in RCA: 1236] [Impact Index Per Article: 154.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 07/27/2016] [Indexed: 12/31/2022]
Abstract
Chronic viral infections are characterized by a state of CD8+ T-cell dysfunction that is associated with expression of the programmed cell death 1 (PD-1) inhibitory receptor. A better understanding of the mechanisms that regulate CD8+ T-cell responses during chronic infection is required to improve immunotherapies that restore function in exhausted CD8+ T cells. Here we identify a population of virus-specific CD8+ T cells that proliferate after blockade of the PD-1 inhibitory pathway in mice chronically infected with lymphocytic choriomeningitis virus (LCMV). These LCMV-specific CD8+ T cells expressed the PD-1 inhibitory receptor, but also expressed several costimulatory molecules such as ICOS and CD28. This CD8+ T-cell subset was characterized by a unique gene signature that was related to that of CD4+ T follicular helper (TFH) cells, CD8+ T cell memory precursors and haematopoietic stem cell progenitors, but that was distinct from that of CD4+ TH1 cells and CD8+ terminal effectors. This CD8+ T-cell population was found only in lymphoid tissues and resided predominantly in the T-cell zones along with naive CD8+ T cells. These PD-1+CD8+ T cells resembled stem cells during chronic LCMV infection, undergoing self-renewal and also differentiating into the terminally exhausted CD8+ T cells that were present in both lymphoid and non-lymphoid tissues. The proliferative burst after PD-1 blockade came almost exclusively from this CD8+ T-cell subset. Notably, the transcription factor TCF1 had a cell-intrinsic and essential role in the generation of this CD8+ T-cell subset. These findings provide a better understanding of T-cell exhaustion and have implications in the optimization of PD-1-directed immunotherapy in chronic infections and cancer.
Collapse
Affiliation(s)
- Se Jin Im
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Masao Hashimoto
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Michael Y Gerner
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-0421, USA
- Department of Immunology, University of Washington School of Medicine, Seattle, Washington 98109, USA
| | - Junghwa Lee
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Haydn T Kissick
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
- Department of Urology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Matheus C Burger
- School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508, Brazil
| | - Qiang Shan
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242, USA
| | - J Scott Hale
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Judong Lee
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Tahseen H Nasti
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Arlene H Sharpe
- Department of Microbiology and Immunology, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA
| | - Gordon J Freeman
- Department of Medical Oncology, Dana-Farber Cancer Institute, Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Ronald N Germain
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-0421, USA
| | - Helder I Nakaya
- School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508, Brazil
| | - Hai-Hui Xue
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242, USA
- Interdisciplinary Immunology Graduate Program, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242, USA
| | - Rafi Ahmed
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| |
Collapse
|
23
|
Nasti TH, Bullard DC, Yusuf N. P-selectin enhances growth and metastasis of mouse mammary tumors by promoting regulatory T cell infiltration into the tumors. Life Sci 2015; 131:11-8. [PMID: 25865803 DOI: 10.1016/j.lfs.2015.02.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 02/17/2015] [Accepted: 02/25/2015] [Indexed: 12/11/2022]
Abstract
AIMS P-selectin is an adhesion receptor that is mainly present on endothelial cells and platelets. We investigated the role of P-selectin in the regulation of different T cell subsets in the tumor microenvironment, and how that influences the growth and metastasis of mouse mammary cancer cell line 4T1 in Balb/c mice. MAIN METHODS The 4T1 cells (1×10(4) or 1×10(5)) were inoculated subcutaneously in the pre-shaved back skin of the P-selectin knockout (P-sel-/-) and wild-type (WT) mice. Mice were monitored twice weekly for the tumor growth measurements and survival studies. The tumors and the lungs were isolated for cytokine and T cell subset analyses at the end of the study. KEY FINDINGS Mice lacking P-selectin had reduced tumor burden, higher survival and reduced metastasis compared to WT mice. Loss of P-selectin inhibited the infiltration of regulatory T cells and reduced pro-inflammatory cytokines, such as IL-4, IL-10, and TGFβ in the tumors. Furthermore, the CD8+ T cells and effector CD4+ T cells were functional and exhibited enhanced infiltration into the tumors of P-selectin knockout mice compared to WT mice. SIGNIFICANCE These results demonstrated that P-selectin is an important adhesion molecule vital for infiltration of regulatory T cells into the tumors. Thus, inhibiting P-selectin can have important therapeutic implications against breast cancer growth and metastasis.
Collapse
Affiliation(s)
- Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Daniel C Bullard
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Nabiha Yusuf
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, USA.
| |
Collapse
|
24
|
Yusuf N, Nasti TH, Ahmad I, Chowdhury S, Mohiuddin H, Xu H, Athar M, Timares L, Elmets CA. In Vivo Suppression of Heat Shock Protein (HSP)27 and HSP70 Accelerates DMBA-Induced Skin Carcinogenesis by Inducing Antigenic Unresponsiveness to the Initiating Carcinogenic Chemical. J Immunol 2015; 194:4796-803. [PMID: 25840912 DOI: 10.4049/jimmunol.1402804] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 03/13/2015] [Indexed: 01/07/2023]
Abstract
Heat shock proteins (HSPs) are constitutively expressed in murine skin. HSP27 is present in the epidermis, and HSP70 can be found in both the epidermis and dermis. The purpose of this study was to investigate the role of these proteins in cutaneous chemical carcinogenesis and to determine whether their effects on cell-mediated immune function were a contributing factor. In vivo inhibition of HSP27 and HSP70 produced a reduction in the T cell-mediated immune response to 7,12-dimethylbenz(a)anthracene (DMBA) and benzo(a)pyrene in C3H/HeN mice and resulted in a state of Ag-specific tolerance. When mice were pretreated with anti-HSP27 and anti-HSP70 Abs in vivo prior to subjecting them to a standard two-stage DMBA/12-O-tetradecanoylphorbol-13-acetate cutaneous carcinogenesis protocol, the percentage of mice with tumors was much greater (p < 0.05) in anti-HSP27- and HSP70-pretreated animals compared with mice pretreated with control Ab. Similar results were obtained when the data were evaluated as the cumulative number of tumors per group. Mice pretreated with HSP27 and HSP70 Abs developed more H-ras mutations and fewer DMBA-specific cytotoxic T lymphocytes. These findings indicate that in mice HSP27 and HSP70 play a key role in the induction of cell-mediated immunity to carcinogenic polyaromatic hydrocarbons. Bolstering the immune response to carcinogenic polyaromatic hydrocarbons may be an effective method for prevention of the tumors that they produce.
Collapse
Affiliation(s)
- Nabiha Yusuf
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and Veteran Affairs Medical Center, Birmingham, AL 35294
| | - Tahseen H Nasti
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and
| | - Israr Ahmad
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and
| | - Sanim Chowdhury
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and
| | - Hasan Mohiuddin
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and
| | - Hui Xu
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and Veteran Affairs Medical Center, Birmingham, AL 35294
| | - Mohammad Athar
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and
| | - Laura Timares
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and Veteran Affairs Medical Center, Birmingham, AL 35294
| | - Craig A Elmets
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL 35294; and Veteran Affairs Medical Center, Birmingham, AL 35294
| |
Collapse
|
25
|
Nasti TH, Cochran JB, Tsuruta Y, Yusuf N, McKay KM, Athar M, Timares L, Elmets CA. A murine model for the development of melanocytic nevi and their progression to melanoma. Mol Carcinog 2015; 55:646-58. [PMID: 25788145 PMCID: PMC4575238 DOI: 10.1002/mc.22310] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 01/22/2015] [Accepted: 02/06/2015] [Indexed: 01/25/2023]
Abstract
Acquired melanocytic nevi are commonly found in sun exposed and unexposed human skin, but the potential for their transformation into invasive melanoma is not clear. Therefore, a mouse model of nevus initiation and progression was developed in C3H/HeN mice using a modified chemical carcinogenesis protocol. Nevi develop due to DNA damage initiated by dimethylbenz(a) anthracene (DMBA) followed by chronic promotion with 12‐O‐tetradecanoyl‐phorbol‐13‐acetate (TPA). Dysplastic pigmented skin lesions appeared in 7–9 wk with 100% penetrance. Nests of melanocytic cells appeared in a subset of skin draining lymph nodes (dLN) by 25 wk, but not in age matched controls. Immunohistochemistry, real‐time PCR, and flow cytometric analyses confirmed their melanocytic origin. Transformed cells were present in a subset of nevi and dLNs, which exhibited anchorage‐independent growth, tumor development, and metastasis in nude mice. Approximately 50% of the cell lines contained H‐Ras mutations and lost tumor suppressor p16Ink4a expression. While most studies of melanoma focus on tumor progression in transgenic mouse models where the mutations are present from birth, our model permits investigation of acquired mutations at the earliest stages of nevus initiation and promotion of nevus cell transformation. This robust nevus/melanoma model may prove useful for identifying genetic loci associated with nevus formation, novel oncogenic pathways, tumor targets for immune‐prevention, screening therapeutics, and elucidating mechanisms of immune surveillance and immune evasion. © 2015 The Authors. Molecular Carcinogenesis, published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Tahseen H Nasti
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - J Barry Cochran
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Yuko Tsuruta
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Skin Diseases Research Center, and The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Nabiha Yusuf
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Skin Diseases Research Center, and The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Birmingham VA Medical Center, Birmingham, Alabama
| | - Kristopher M McKay
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Mohammad Athar
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Skin Diseases Research Center, and The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Laura Timares
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Skin Diseases Research Center, and The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Birmingham VA Medical Center, Birmingham, Alabama
| | - Craig A Elmets
- The Department of Dermatology, The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Skin Diseases Research Center, and The University of Alabama at Birmingham School of Medicine, Birmingham, Alabama.,The Birmingham VA Medical Center, Birmingham, Alabama
| |
Collapse
|
26
|
Nasti TH, Rudemiller KJ, Cochran JB, Kim HK, Tsuruta Y, Fineberg NS, Athar M, Elmets CA, Timares L. Immunoprevention of chemical carcinogenesis through early recognition of oncogene mutations. J Immunol 2015; 194:2683-95. [PMID: 25694611 DOI: 10.4049/jimmunol.1402125] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Prevention of tumors induced by environmental carcinogens has not been achieved. Skin tumors produced by polyaromatic hydrocarbons, such as 7,12-dimethylbenz(a)anthracene (DMBA), often harbor an H-ras point mutation, suggesting that it is a poor target for early immunosurveillance. The application of pyrosequencing and allele-specific PCR techniques established that mutations in the genome and expression of the Mut H-ras gene could be detected as early as 1 d after DMBA application. Further, DMBA sensitization raised Mut H-ras epitope-specific CTLs capable of eliminating Mut H-ras(+) preneoplastic skin cells, demonstrating that immunosurveillance is normally induced but may be ineffective owing to insufficient effector pool size and/or immunosuppression. To test whether selective pre-expansion of CD8 T cells with specificity for the single Mut H-ras epitope was sufficient for tumor prevention, MHC class I epitope-focused lentivector-infected dendritic cell- and DNA-based vaccines were designed to bias toward CTL rather than regulatory T cell induction. Mut H-ras, but not wild-type H-ras, epitope-focused vaccination generated specific CTLs and inhibited DMBA-induced tumor initiation, growth, and progression in preventative and therapeutic settings. Transferred Mut H-ras-specific effectors induced rapid tumor regression, overcoming established tumor suppression in tumor-bearing mice. These studies support further evaluation of oncogenic mutations for their potential to act as early tumor-specific, immunogenic epitopes in expanding relevant immunosurveillance effectors to block tumor formation, rather than treating established tumors.
Collapse
Affiliation(s)
- Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294
| | - Kyle J Rudemiller
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294
| | - J Barry Cochran
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294
| | - Hee Kyung Kim
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; Skin Diseases Research Center, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294
| | - Yuko Tsuruta
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; Skin Diseases Research Center, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294
| | - Naomi S Fineberg
- Division of Biostatistics, School of Public Health, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; and
| | - Mohammad Athar
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; Skin Diseases Research Center, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294
| | - Craig A Elmets
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; Skin Diseases Research Center, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; Birmingham, Alabama VA Medical Center, Birmingham, AL 35233
| | - Laura Timares
- Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; Skin Diseases Research Center, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294; Birmingham, Alabama VA Medical Center, Birmingham, AL 35233
| |
Collapse
|
27
|
Nasti TH, Tsuruta Y, McKay K, Athar M, Elmets C, Timares L. Abstract B33: Langerhans cells prevent melanocytic nevus development and transformation in mice. Cancer Res 2015. [DOI: 10.1158/1538-7445.chtme14-b33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
The function of Langerhans cells (LCs) in the skin immune system is unclear, and a matter of intense debate. In different mouse models LCs have been shown to induce antitumor immunity or promote skin squamous cell carcinoma (SCC). Their role in the control or promotion of melanoma is not known. We assessed LC's role in the development of DMBA-TPA induced pigmented benign and transformed lesions in a novel mouse model. Transgenic HuLang-DTA+/- C57Bl/6 mice, which selectively ablate epidermal LCs, were crossed with C3H/HeN mice to generate F1 LC knockout (KO) and WT littermate controls. LC-KO mice developed 40% more and 2-fold larger melanocytic lesions than WT. Cell suspensions from LC-KO pigmented skin lesions contained increased CD4+ Foxp3+ regulatory T cells and CD11b-/loGr-1hi cells, consistent with an immunosuppressive microenvironment. CD11c+CD11b+Ly6C+ APCs or MHCII+ cell numbers were fewer in lesions from LC-KO as compared to WT mice. Nests of melanocytic cells were observed at a higher frequency in draining lymph nodes (dLNs) from LC-KO as compared to WT; DLN cells contained increased numbers of TRP2+ cells and routinely gave rise to proliferative melanocytic cell lines. Real-time PCR analysis of epidermal cDNA from TPA treated LC-KO, as compared to WT, demonstrated a profound loss of IL-10, IL-12p35 and IL-12p40, indicating LCs as the major source. Further, IL-23 steady state levels in the epidermis of LC-KO are increased greater than 3-fold over WT, indicating that LCs normally suppress keratinocyte production of IL-23. Thus, in contrast to SCC, LCs inhibit development of benign and metastatic pigmented tumors. This novel murine model will be useful in elucidating transformation mechanisms and identifying novel therapeutic targets that may prevent metastatic melanoma.
Citation Format: Tahseen H. Nasti, Yuko Tsuruta, Kris McKay, Mohammad Athar, Craig Elmets, Laura Timares. Langerhans cells prevent melanocytic nevus development and transformation in mice.. [abstract]. In: Abstracts: AACR Special Conference on Cellular Heterogeneity in the Tumor Microenvironment; 2014 Feb 26-Mar 1; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2015;75(1 Suppl):Abstract nr B33. doi:10.1158/1538-7445.CHTME14-B33
Collapse
Affiliation(s)
| | - Yuko Tsuruta
- University of Alabama at Birmingham, Birmingham, AL
| | - Kris McKay
- University of Alabama at Birmingham, Birmingham, AL
| | | | - Craig Elmets
- University of Alabama at Birmingham, Birmingham, AL
| | | |
Collapse
|
28
|
Nasti TH, Timares L. MC1R, eumelanin and pheomelanin: their role in determining the susceptibility to skin cancer. Photochem Photobiol 2014; 91:188-200. [PMID: 25155575 DOI: 10.1111/php.12335] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Accepted: 08/17/2014] [Indexed: 12/16/2022]
Abstract
Skin pigmentation is due to the accumulation of two types of melanin granules in the keratinocytes. Besides being the most potent blocker of ultraviolet radiation, the role of melanin in photoprotection is complex. This is because one type of melanin called eumelanin is UV absorbent, whereas the other, pheomelanin, is photounstable and may even promote carcinogenesis. Skin hyperpigmentation may be caused by stress or exposure to sunlight, which stimulates the release of α-melanocyte stimulating hormone (α-MSH) from damaged keratinocytes. Melanocortin 1 receptor (MC1R) is a key signaling molecule on melanocytes that responds to α-MSH by inducing expression of enzymes responsible for eumelanin synthesis. Persons with red hair have mutations in the MC1R causing its inactivation; this leads to a paucity of eumelanin production and makes red-heads more susceptible to skin cancer. Apart from its effects on melanin production, the α-MSH/MC1R signaling is also a potent anti-inflammatory pathway and has been shown to promote antimelanoma immunity. This review will focus on the role of MC1R in terms of its regulation of melanogenesis and influence on the immune system with respect to skin cancer susceptibility.
Collapse
Affiliation(s)
- Tahseen H Nasti
- The Department of Dermatology, University of Alabama at Birmingham School of Medicine, Birmingham, AL
| | | |
Collapse
|
29
|
Abstract
IgM is the first Ig isotype to appear during phylogeny, ontogeny and the immune response. The importance of both pre-immune "natural" and antigen-induced "immune" IgM antibodies in immune responses to pathogens and self-antigens has been established by studies of mutant mice deficient in IgM secretion. Effector proteins interacting with the Fc portion of IgM, such as complement and complement receptors, have thus far been proposed, but fail to fully account for the IgM-mediated immune protection and regulation of immune responses. Particularly, the role of the Fc receptor for IgM (FcμR) in such effector functions has not been explored until recently. We have identified an authentic FcμR in humans using a functional cloning strategy and subsequently in mice by RT-PCR and describe here its salient features and the immunological consequences of FcμR deficiency in mice. Since the FcμR we cloned was identical to Toso or Fas inhibitory molecule 3 (FAIM3), there have been spirited debates regarding the real function of FcμR/Toso/FAIM3 and we will also comment on this topic.
Collapse
Affiliation(s)
- Hiromi Kubagawa
- Division of Laboratory Medicine, Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, 35209, USA,
| | | | | | | | | | | |
Collapse
|
30
|
Batory M, Batory D, Grabarczyk J, Kaczorowski W, Kupcewicz B, Mitura K, Nasti TH, Yusuf N, Niedzielski P. Biological properties of carbon powders synthesized using chemical vapour deposition and detonation methods. J Nanosci Nanotechnol 2012; 12:9037-9046. [PMID: 23447955 DOI: 10.1166/jnn.2012.6745] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Carbon powders can be synthesized using variety of CVD and detonation methods. Several interesting properties of carbon powder particles make them a very attractive material examined in many laboratories all over the world. However there is a lack of information discussing investigation of carbon powders directed to its application in pharmaceutical-cosmetic industry and medicine. Earlier investigation results proved that diamond powders present properties fighting free radicals. Presented work discusses the influence of carbon powder particles manufactured using MW/RF PACVD, RF PACVD and detonation methods onto hydro-lipid skin coat. Before the biological examinations physicochemical properties of carbon powders were determined. Grain size, shape and chemical composition of carbon powders were determined using the scanning electron microscopy. Surface functional groups were characterized by IR Fourier-transform spectroscopy and X-ray photoelectron spectroscopy. Structure and phase composition were investigated by means of the Raman spectroscopy. Results of allergy tests performed on laboratory mice proved that carbon powder particles synthesized using different methods do not cause allergy. In the following stage, the group of 20 patients applied the formula including carbon powder on their face skin. The influence of carbon powder onto hydro-lipid skin coat was determined by measurement of such parameters as: pH reaction, skin temperature, lipid fotometry and level of hydration. Additionally, macro pictures of places where the cream had been applied were registered. As the result of the investigation it was found that powders synthesized using various methods present different physicochemical properties which may individually affect the face skin parameters. The noticeable improvement of hydro-lipid skin coat kilter was observed.
Collapse
Affiliation(s)
- M Batory
- Institute of Materials Science and Engineering, Technical University of Lodz, 1/15 Stefanowskiego Street, 90-924 Lodz, Poland
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Abstract
Although keratinocytes are relatively resistant to ultraviolet radiation (UVR) induced damage, repeated UVR exposure result in accumulated DNA mutations that can lead to epidermal malignancies. Keratinocytes play a central role in elaborating innate responses that lead to inflammation and influence the generation of adaptive immune responses in skin. Apart from the minor cellular constituents of the epidermis, specifically Langerhans cells and melanocytes, keratinocytes are the major source of cytokines. UVR exposure stimulates keratinocytes to secrete abundant pro-inflammatory IL-1-family proteins, IL-1α, IL-1β, IL-18, and IL-33. Normal skin contains only low levels of inactive precursor forms of IL-1β and IL-18, which require caspase 1-mediated proteolysis for their maturation and secretion. However, caspase-1 activation is not constitutive, but dependents on the UV-induced formation of an active inflammasome complex. IL-1 family cytokines can induce a secondary cascade of mediators and cytokines from keratinocytes and other cells resulting in wide range of innate processes including infiltration of inflammatory leukocytes, induction of immunosuppression, DNA repair or apoptosis. Thus, the ability of keratinocytes to produce a wide repertoire of proinflammatory cytokines can influence the immune response locally as well as systematically, and alter the host response to photodamaged cells. We will highlight differential roles played by each IL-1 family molecule generated by UV-damaged keratinocytes, and reveal their complementary influences in modulating acute inflammatory and immunological events that follow cutaneous UV exposure.
Collapse
Affiliation(s)
- Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | | |
Collapse
|
32
|
Mojib N, Nasti TH, Andersen DT, Attigada VR, Hoover RB, Yusuf N, Bej AK. The antiproliferative function of violacein-like purple violet pigment (PVP) from an Antarctic Janthinobacterium sp. Ant5-2 in UV-induced 2237 fibrosarcoma. Int J Dermatol 2011; 50:1223-33. [PMID: 21790550 DOI: 10.1111/j.1365-4632.2010.04825.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND In this study, we have investigated the chemotherapeutic potential of a purple violet pigment (PVP), which was isolated from a previously undescribed Antarctic Janthinobacterium sp. (Ant5-2), against murine UV-induced 2237 fibrosarcoma and B16F10 melanoma cells. METHODS The 2237, B16F10, C50, and NIH3T3 cells were treated with PVP at different doses and for different times, and their proliferation and viability were detected by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay. Cell cycle arrest induced by PVP in 2237 fibrosarcoma cells was assessed by flow cytometry and expression analysis of cell cycle regulatory proteins were done by Western blot. Apoptosis induced by PVP in 2237 cells was observed by annexin-V/propidium iodide double staining flow cytometry assay and fluorescence microscopy. To further determine the molecular mechanism of apoptosis induced by PVP, the changes in expression of Bcl-2, Bax and cytochrome c were detected by Western blot. The loss of mitochondrial membrane potential in PVP treated 2237 cells was assessed by staining with JC-1 dye following flow cytometry. Caspase-3, Caspase-9 and PARP cleavage were analyzed by Western blot and Caspase-3 and -9 activities were measured by colorimetric assays. RESULTS In vitro treatment of murine 2237 cells with the PVP resulted in decreased cell viability (13-79%) in a time (24-72 h) and dose (0.1-1 μM)-dependent manner. The PVP-induced growth inhibition in 2237 cells was associated with both G0/G1 and G2/M phase arrest accompanied with decrease in the expression of cyclin dependent kinases (Cdks) and simultaneous increase in the expression of cyclin dependent kinase inhibitors (Cdki) - Cip1/p21 and Kip1/p27. Further, we observed a significant increase in the apoptosis of the 2237 fibrosarcoma cells which was associated with an increased expression of pro-apoptotic protein Bax, decreased expression of anti-apoptotic proteins Bcl-2, disruption of mitochondrial membrane potential, cytochrome c release, activation of caspase-3, caspase-9 and poly-ADP-ribose-polymerase (PARP) cleavage. CONCLUSIONS We describe the anti-cancer mechanism of the PVP for the first time from an Antarctic bacterium and suggest that the PVP could be used as a potent chemotherapeutic agent against nonmelanoma skin cancers.
Collapse
Affiliation(s)
- Nazia Mojib
- Department of Biology, University of Alabama at Birmingham, AL 35294-1170, USA
| | | | | | | | | | | | | |
Collapse
|
33
|
Naseemuddin M, Iqbal A, Nasti TH, Ghandhi JL, Kapadia AD, Yusuf N. Cell mediated immune responses through TLR4 prevents DMBA-induced mammary carcinogenesis in mice. Int J Cancer 2011; 130:765-74. [PMID: 21455984 DOI: 10.1002/ijc.26100] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Accepted: 03/18/2011] [Indexed: 02/06/2023]
Abstract
Toll-like receptors (TLRs) activate signals that are critically involved in the initiation of adaptive immune responses and many tumorigenic chemicals have been associated with activation of those pathways. To determine the role of TLR-4 (TLR4) in mammary carcinogenesis, we subjected TLR4 deficient and wild type (WT) mice to oral gavage with carcinogenic polyaromatic hydrocarbon 7,12-dimethylbenz(a)anthracene (DMBA). TLR4 deficient mice developed more tumors relative to the WT mice. T cells of TLR4 deficient mice produced elevated levels of IL-17 and lower levels of IFN-γ relative to WT mice. IL-12 secreted by CD11c(+) cells was higher in WT mice, whereas greater amounts of IL-23 were produced by CD11c(+) cells from TLR4 deficient mice. Moreover, there was higher incidence of regulatory T cells in TLR4 deficient mice than WT mice. Similarly, various markers of angiogenesis [matrix metalloproteinases (MMP)-2 and MMP-9, CD31 and vascular endothelial growth factor] were highly expressed in tumors from TLR4 deficient mice than WT mice. The results of this study indicate that TLR4 plays an important role in the prevention of DMBA induced mouse mammary tumorigenesis and efforts to divert the cell-mediated immune response may, therefore, prove to be beneficial in the prevention of mammary tumors.
Collapse
Affiliation(s)
- Mohammed Naseemuddin
- Department of Dermatology and Skin Diseases Research Center, University of Alabama at Birmingham, AL 35294-0019, USA
| | | | | | | | | | | |
Collapse
|
34
|
Lewis W, Simanyi E, Li H, Thompson CA, Nasti TH, Jaleel T, Xu H, Yusuf N. Regulation of ultraviolet radiation induced cutaneous photoimmunosuppression by toll-like receptor-4. Arch Biochem Biophys 2011; 508:171-7. [PMID: 21236239 DOI: 10.1016/j.abb.2011.01.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/06/2011] [Accepted: 01/06/2011] [Indexed: 10/18/2022]
Abstract
UVB radiation is a potent immunosuppressive agent that inhibits cell-mediated immune responses. The mechanisms by which UVB radiation influences cell-mediated immune responses have been the subject of extensive investigation. However, the role of innate immunity on photoimmunological processes has received little attention. The purpose of this study was to determine whether Toll-like receptor-4 (TLR4) contributed to UV-induced suppression of contact hypersensitivity (CHS) responses. TLR4⁻/⁻ and wild type C57BL/6 (TLR4+/+) mice were subjected to a local UVB immunosuppression regimen consisting of 100 mJ/cm² UVB radiation followed by sensitization with the hapten DNFB. Wild type TLR4+/+ mice exhibited significant suppression of contact hypersensitivity response, whereas TLR4⁻/⁻ developed significantly less suppression. The suppression in wild type TLR4+/+ mice could be adoptively transferred to naïve syngeneic recipients. Moreover, there were significantly fewer Foxp3 expressing CD4+CD25+ regulatory T-cells in the draining lymph nodes of UV-irradiated TLR4⁻/⁻ mice than TLR4+/+ mice. When cytokine levels were compared in these two strains after UVB exposure, T-cells from TLR4+/+ mice produced higher levels of IL-10 and TGF-β and lower levels of IFN-γ and IL-17. Strategies to inhibit TLR4 may allow us to develop immunopreventive and immunotherapeutic approaches for management of UVB induced cutaneous immunosuppression.
Collapse
Affiliation(s)
- Wesley Lewis
- Department of Dermatology and Skin Diseases Research Center, University of Alabama at Birmingham, AL, USA
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Nasti TH, Iqbal O, Tamimi IA, Geise JT, Katiyar SK, Yusuf N. Differential roles of T-cell subsets in regulation of ultraviolet radiation induced cutaneous photocarcinogenesis. Photochem Photobiol 2010; 87:387-98. [PMID: 21143237 DOI: 10.1111/j.1751-1097.2010.00859.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ultraviolet (UV) radiation, in particular the midwavelength range (UVB; 290-320 nm), is one of the most significant risk factors for the development of nonmelanoma skin cancer. UVB radiation-induced immunosuppression, which occurs in both humans and laboratory animals, contributes to their pathogenesis. However, there are conflicting reports on the relative role of CD4(+) and CD8(+) T cells in UVB induced skin cancer. The purpose of this study was to delineate the contribution of these two cell subpopulations to UVB induced immunosuppression and tumor development using C3H/HeN (WT), CD4 knockout (CD4(-/-) ) and CD8 knockout (CD8(-/-) ) mice. We observed that UVB induced skin carcinogenesis was retarded in terms of number of tumors per group, tumor volume and percentage of mice with tumors, in mice deficient in CD4(+) T cells compared with wild-type mice, whereas significantly greater (P < 0.05) numbers of tumors occurred in CD8(-/-) mice. These results indicate that, CD4(+) T cells promote tumor development while CD8(+) T cells have the opposite effect. Further, we found that CD4(+) T cells from tumor-bearing mice produced interleukin (IL)-4, IL-10, and IL-17 whereas CD8(+) T cells produced interferon-γ. Manipulation of T-cell subpopulations that are induced by UVB radiation could be a means of preventing skin cancers caused by this agent.
Collapse
Affiliation(s)
- Tahseen H Nasti
- Department of Dermatology and Skin Diseases Research Center, University of Alabama, Birmingham, AL, USA
| | | | | | | | | | | |
Collapse
|
36
|
Naseemuddin M, Nasti TH, Yusuf N. Abstract 3459: Loss of p16INK4a gene renders mice more susceptible to DMBA-induced mammary carcinogenesis. Cancer Res 2010. [DOI: 10.1158/1538-7445.am10-3459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Breast cancer is the most common type of cancer diagnosed in women. The incidence of breast cancer varies with environmental influences, including carcinogen exposure. Polyaromatic hydrocarbons (PAH), have been implicated as etiologic agents in breast cancer. Exposure occurs primarily through the smoking of tobacco, inhalation of polluted air, and ingestion of charred foods. One such example of a carcinogenic polyaromatic hydrocarbon is 7,12-dimethylbenz(a)anthracene (DMBA) which in animal models, induces mammary adenocarcinoma. p16, a low molecular weight tumor suppressor protein, and a major CDK inhibitor, is the product of a tumor suppressor p16/INK4a gene. It is frequently inactivated in the human tumors. In the present study, we were interested to evaluate the role of p16INK4a in DMBA-induced mammary carcinogenesis. Tumor latency was higher in p16INK4a−/− compared to WT (C3H/HeN) counterparts. Tumors from p16INK4a−/− mice were very aggressive as revealed by PCNA and Ki67 staining and qRT-PCR analysis. The levels of angiogeneic markers CD31 and VEGF were also higher in the tumors of p16INK4a−/− mice as compared to WT mice. These results indicate that restoration of p16INK4a−/− function can be helpful in reducing mammary tumors caused by environmental pollutants like DMBA.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 3459.
Collapse
|
37
|
Yusuf N, Nasti TH, Meleth S, Elmets CA. Resveratrol enhances cell-mediated immune response to DMBA through TLR4 and prevents DMBA induced cutaneous carcinogenesis. Mol Carcinog 2009; 48:713-23. [PMID: 19142898 DOI: 10.1002/mc.20517] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Toll-like receptors (TLRs) activate signals that are critically involved in innate immune responses and that contribute to the initiation of adaptive immune responses. Resveratrol (trans-3,5,4-trihydroxystilbene), a polyphenol found in red grapes and in several other plant sources, is an effective chemopreventive agent in cutaneous chemical carcinogenesis. In this study, we investigated whether TLR4 was required for the chemopreventive action of resveratrol in DMBA skin carcinogenesis. For this purpose, mice with normal and deficient TLR4 function were compared when pretreated with resveratrol and then subjected to a DMBA-induced skin carcinogenesis protocol. There were fewer tumors/group (P < 0.001) in resveratrol treated TLR4 competent C3H/HeN mice than in TLR4 deficient C3H/HeJ mice. In addition, the size of tumors in C3H/HeN mice was reduced in vivo and their survival in vitro was inhibited by resveratrol to a significantly greater extent than in C3H/HeJ mice. Resveratrol inhibited angiogenesis to a much greater extent in the TLR4 competent mice than in TLR4 deficient mice. IFN-gamma and IL-12 levels were also increased in TLR4 competent mice compared to TLR4 deficient mice, and TLR4 competent C3H/HeN mice exhibited a greater increase in the cell-mediated immune response to DMBA. The results of this study indicate that TLR4 is an important mediator of resveratrol chemoprevention in DMBA skin tumorigenesis.
Collapse
Affiliation(s)
- Nabiha Yusuf
- Department of Dermatology, Skin Diseases Research Center, University of Alabama at Birmingham, Birmingham, Alabama 35294-0019, USA
| | | | | | | |
Collapse
|
38
|
Yusuf N, Nasti TH, Huang CM, Huber BS, Jaleel T, Lin HY, Xu H, Elmets CA. Heat shock proteins HSP27 and HSP70 are present in the skin and are important mediators of allergic contact hypersensitivity. J Immunol 2009; 182:675-83. [PMID: 19109201 DOI: 10.4049/jimmunol.182.1.675] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Proteomic analysis of murine skin has shown that a variety of heat shock proteins (HSPs) are constitutively expressed in the skin. Using murine allergic contact hypersensitivity as a model, we investigated the role of two heat shock proteins, HSP27 and HSP70, in the induction of cutaneous cell-mediated immune responses. Immunohistochemical examination of skin specimens showed that HSP27 was present in the epidermis and HSP70 was present in both the epidermis and dermis. Inhibition of HSP27 and HSP70 produced a reduction in the 1-fluoro-2,4-dinitrobenzene contact hypersensitivity response and resulted in the induction of Ag-specific unresponsiveness. Treatment of dendritic cell cultures with recombinant HSP27 caused in the up-regulation of IL-1beta, TNF-alpha, IL-6, IL-12p70, and IL-12p40 but not IL-23p19, which was inhibited when Abs to HSP27 were added. The 1-fluoro-2,4-dinitrobenzene-conjugated dendritic cells that had been treated with HSP27 had an increased capacity to initiate contact hypersensitivity responses compared with control dendritic cells. This augmented capacity required TLR4 signaling because neither cytokine production by dendritic cells nor the increased induction of contact hypersensitivity responses occurred in TLR4-deficient C3H/HeJ mice. Our findings indicate that a cascade of events occurs following initial interaction of hapten with the skin that includes increased activity of HSPs, their interaction with TLR4, and, in turn, increased production of cytokines that are known to enhance Ag presentation by T cells. The results suggest that HSPs form a link between adaptive and innate immunity during the early stages of contact hypersensitivity.
Collapse
Affiliation(s)
- Nabiha Yusuf
- Department of Dermatology and Skin Diseases Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Yusuf N, Nasti TH, Katiyar SK, Jacobs MK, Seibert MD, Ginsburg AC, Timares L, Xu H, Elmets CA. Antagonistic roles of CD4+ and CD8+ T-cells in 7,12-dimethylbenz(a)anthracene cutaneous carcinogenesis. Cancer Res 2008; 68:3924-30. [PMID: 18483278 DOI: 10.1158/0008-5472.can-07-3059] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The role that cell-mediated immune responses play during cutaneous carcinogenesis has received little attention. In this study, we evaluated the contribution of CD4(+) and CD8(+) T cells in C3H/HeN mice that were subjected to a two-stage 7,12-dimethylbenz(a)anthracene (DMBA) initiation, 12-O-tetradecanoylphorbol-13-acetate (TPA) promotion skin carcinogenesis protocol. In CD8 knockout (CD8(-/-)) mice, allergic contact hypersensitivity to DMBA was reduced compared with wild-type (WT) C3H/HeN mice. On the other hand, CD4 knockout (CD4(-/-)) mice developed an exaggerated contact hypersensitivity response. CD4(+) T cells from DMBA contact-sensitized mice preferentially produced interleukin 4 (IL-4), IL-10, and IL-17; CD8(+) T cells, on the other hand, secreted IFN-gamma. When CD4(-/-), CD8(-/-), and WT mice were subjected to a standard two-stage DMBA/TPA cutaneous carcinogenesis protocol, the percentage of mice with tumors was much greater (P < 0.001) in CD8(-/-) mice than in WT mice. In contrast, the percentage of tumors was significantly less (P < 0.001) in CD4(-/-) mice than in WT mice. Similar results were obtained when the data were evaluated as the number of tumors per mouse. These findings indicate that (a) CD8(+) T cells are the predominant effector cells in allergic contact hypersensitivity to DMBA and that CD4(+) T cells have an inhibitory role and (b) the development of CD8(+) T cells plays a protective role in skin tumor development whereas CD4(+) T cells have the opposite effect. Manipulation of T-cell subpopulations that are induced by carcinogenic chemicals, like DMBA, could be a means of preventing skin cancers caused by these agents.
Collapse
Affiliation(s)
- Nabiha Yusuf
- Department of Dermatology and Skin Diseases Research Center, University of Alabama at Birmingham and Birmingham VA Medical Center, Birmingham, Alabama, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Yusuf N, Nasti TH, Long JA, Naseemuddin M, Lucas AP, Xu H, Elmets CA. Protective role of Toll-like receptor 4 during the initiation stage of cutaneous chemical carcinogenesis. Cancer Res 2008; 68:615-22. [PMID: 18199559 DOI: 10.1158/0008-5472.can-07-5219] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Toll-like receptors (TLR) activate multiple steps in inflammatory reactions in innate immune responses. They also activate signals that are critically involved in the initiation of adaptive immune responses. Many tumorigenic chemicals have been associated with endotoxin hypersensitivity mediated through TLR4. To determine the role of TLR4 in cutaneous skin carcinogenesis, we treated TLR4-deficient C3H/HeJ mice and the TLR4-normal C3H/HeN mice with the carcinogenic polyaromatic hydrocarbon 7,12-dimethylbenz(a)anthracene (DMBA). TLR4-deficient C3H/HeJ mice developed more tumors relative to the TLR4-normal C3H/HeN mice. Both C3H/HeN and C3H/HeJ mice developed a T-cell-mediated immune response to topically applied DMBA. Interestingly, the cell-mediated immune response was mediated by IFN-gamma in C3H/HeN mice and by interleukin (IL)-17 in C3H/HeJ mice. Moreover, C3H/HeN mice had elevated circulating levels of IFN-gamma following topical application of DMBA, whereas IL-17 was elevated in C3H/HeJ mice. The results of this study indicate that TLR4 plays an important role in the prevention of DMBA skin tumorigenesis and that this is associated with differences in the T-cell subtype activated. Efforts to divert the cell-mediated immune response from one that is IL-17 mediated to one that is IFN-gamma mediated may prove to be beneficial in the prevention of DMBA-induced cutaneous tumors.
Collapse
Affiliation(s)
- Nabiha Yusuf
- Department of Dermatology and Skin Diseases Research Center, University of Alabama at Birmingham, 1670 University Boulevard, VH 566A, P. O. Box 202, Birmingham, AL 35294-0019, USA.
| | | | | | | | | | | | | |
Collapse
|
41
|
Nasti TH, Khan MA, Owais M. Enhanced efficacy of pH-sensitive nystatin liposomes against Cryptococcus neoformans in murine model. J Antimicrob Chemother 2005; 57:349-52. [PMID: 16368700 DOI: 10.1093/jac/dki454] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES To evaluate the efficacy of pH-sensitive liposomes of nystatin against Cryptococcus neoformans infection in a murine model. METHODS In the present study, we investigated the antifungal activity of nystatin entrapped in pH-sensitive liposomes in a murine model. Mice infected with C. neoformans were treated with nystatin in neutral egg phosphatidylcholine (egg-PC) liposomes, as well as pH-sensitive nystatin liposomes. The anticryptococcal efficacy of liposomal formulations of nystatin was assessed by continued survival and colony-forming units (cfu) in liver and brain of the treated mice. RESULTS pH-sensitive liposomes of nystatin showed better efficacy compared with its free or egg-PC liposome form against C. neoformans infection in BALB/c mice. Mice treated with pH-sensitive nystatin liposomes showed 80% survival with less fungal burden in liver and brain of treated mice. However, there was only 40% survival in the group of animals treated with egg-PC liposome-intercalated nystatin, whereas its free form had poor efficacy with 20% survival. CONCLUSIONS The enhanced anticryptococcal efficacy of the pH-sensitive nystatin liposomes can be attributed to the pH-dependent release of the drug in the low pH environment of lysosomes. The destabilization of the pH-sensitive liposomes in the acidic environment of macrophages results in the site-specific targeting of nystatin that improves its intracellular antifungal activity.
Collapse
Affiliation(s)
- Tahseen H Nasti
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | | | | |
Collapse
|
42
|
Khan MA, Nasti TH, Owais M. Incorporation of amphotericin B in tuftsin-bearing liposomes showed enhanced efficacy against systemic cryptococcosis in leucopenic mice. J Antimicrob Chemother 2005; 56:726-31. [PMID: 16126780 DOI: 10.1093/jac/dki307] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES The role of the immunomodulator tuftsin in enhancing the antifungal activity of liposomal amphotericin B against Cryptococcus neoformans in leucopenic mice was assessed. METHODS In the present study, we investigated the antifungal activity of amphotericin B liposomes with tuftsin grafted on the surface. Mice were treated with free amphotericin B as well as liposomal formulations after C. neoformans infection. For prophylactic studies, mice were pre-treated with liposomal tuftsin (50 microg/mL) for three consecutive days prior to C. neoformans infection (7 x 10(5) cfu/mouse). Chemotherapy, with tuftsin-free and tuftsin-bearing amphotericin B liposomes, was started 24 h post C. neoformans infection. The role of tuftsin in immunoaugmentative therapy was assessed by survival and cfu of treated mice. RESULTS Amphotericin B entrapped in tuftsin-bearing liposomes showed increased anticryptococcal activity in the murine model. Moreover, tuftsin pre-treatment further augmented the antifungal activity of liposomal amphotericin B in leucopenic mice. Incorporation of tuftsin in liposomes resulted in increased anticryptococcal activity of liposomal amphotericin B compared with amphotericin B deoxycholate and conventional liposomal amphotericin B formulations. CONCLUSIONS The enhanced anticryptococcal activity of amphotericin B in tuftsin-liposomes can be attributed to the immune-stimulating property of tuftsin. Tuftsin activates the key immune cells, due to the presence of its receptors on macrophages and neutrophils, for a better fight against pathogens. Simultaneous liposome-mediated delivery of amphotericin B to the site of infection kills the pathogens more effectively.
Collapse
Affiliation(s)
- Masood A Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh-202002, India
| | | | | |
Collapse
|
43
|
Khan MA, Jabeen R, Nasti TH, Mohammad O. Enhanced anticryptococcal activity of chloroquine in phosphatidylserine-containing liposomes in a murine model. J Antimicrob Chemother 2004; 55:223-8. [PMID: 15590713 DOI: 10.1093/jac/dkh522] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES The anticryptococcal activity of chloroquine was assessed after incorporation in phosphatidylserine (PS)-containing negatively charged liposomes in a murine model. METHODS In the present study, we investigated the antifungal activity of chloroquine entrapped in PS liposomes against Cryptococcus neoformans in the macrophage cell line J 774 and in a murine model. Mice were treated with free as well as liposomal formulations of chloroquine before and after challenging with C. neoformans infection. The anticryptococcal activity of chloroquine was also evaluated in combination with fluconazole in the treatment of systemic murine cryptococcosis. The efficacy of chloroquine treatment was assessed by continued survival as well as by colony forming units (cfu) in liver and brain of treated mice. RESULTS Chloroquine entrapped in PS liposomes shows increased activity against C. neoformans infection both in in vitro and in vivo studies. Moreover, the antifungal activity of fluconazole increases when used in combination with liposomal chloroquine. Chloroquine in PS liposomes was found to be more effective in comparison with the same dose of free chloroquine or chloroquine entrapped in neutral liposomes. CONCLUSIONS The enhanced anticryptococcal activity of chloroquine in PS liposomes seems to be due to uptake of drug-containing PS liposomes by macrophages. It can be assumed that liposome-mediated delivery of chloroquine to macrophages results in an unfavourable (alkaline) environment for the growth of C. neoformans inside macrophages.
Collapse
Affiliation(s)
- Masood A Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh-202002, India.
| | | | | | | |
Collapse
|
44
|
Khan MA, Nasti TH, Saima K, Mallick AI, Firoz A, Wajahul H, Ahmad N, Mohammad O. Co-administration of immunomodulator tuftsin and liposomised nystatin can combat less susceptible Candida albicans infection in temporarily neutropenic mice. ACTA ACUST UNITED AC 2004; 41:249-58. [PMID: 15196575 DOI: 10.1016/j.femsim.2004.03.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2004] [Revised: 03/20/2004] [Accepted: 03/22/2004] [Indexed: 10/26/2022]
Abstract
In order to develop a prospective chemotherapeutic agent against opportunistic infections, it is important to know that host factors such as degree of immunological debility as well as recovery of immune functions to normality may contribute significantly to a successful elimination of the pathogens. We demonstrated previously that concomitant delivery of antimicrobial agents and immunomodulators to the pathogen harbouring-host contributes to the complete elimination of the deep-seated fungal infections (aspergillosis and candidiasis) in animals with normal immune status. Considering that neutropenic hosts are the main targets of such infections, it can be argued about the potential of the immunomodulator-based therapy in subjects with non-functional immune system. To resolve the hypothesis, we studied the role of immunomodulator tuftsin against experimental murine candidiasis in temporarily neutropenic Balb/c mice. The neutropenic mice were challenged with an isolate of Candida albicans that was showing less susceptibility to both free and liposomised-amphotericin B. The co-administration of tuftsin increased the efficiency of liposomised-polyene antibiotics (nystatin and amphotericin B) against experimental murine candidiasis in immunocompromised Balb/c mice. Pretreatment with liposomised tuftsin prior to C. albicans infection clearly enhanced protection against candidiasis, suggesting a prophylactic role of tuftsin in normal and temporarily neutropenic animals.
Collapse
Affiliation(s)
- Masood A Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, 202002, India
| | | | | | | | | | | | | | | |
Collapse
|
45
|
Syed FM, Khan MA, Nasti TH, Ahmad N, Mohammad O. Antigen entrapped in the escheriosomes leads to the generation of CD4(+) helper and CD8(+) cytotoxic T cell response. Vaccine 2003; 21:2383-93. [PMID: 12744869 DOI: 10.1016/s0264-410x(03)00106-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In previous study, we demonstrated the potential of Escherichia coli (E. coli) lipid liposomes (escheriosomes) to undergo membrane-membrane fusion with cytoplasmic membrane of the target cells including professional antigen presenting cells. Our present study demonstrates that antigen encapsulated in escheriosomes could be successfully delivered simultaneously to the cytosolic as well as endosomal processing pathways of antigen presenting cells, leading to the generation of both CD4(+) T-helper and CD8(+) cytotoxic T cell response. In contrast, encapsulation of same antigen in egg phosphatidyl-choline (egg PC) liposomes, just like antigen-incomplete Freund's adjuvant (IFA) complex, has inefficient access to the cytosolic pathway of MHC I-dependent antigen presentation and failed to generate antigen-specific CD8(+) cytotoxic T cell response. However, both egg PC liposomes as well as escheriosomes-encapsulated antigen elicited strong humoral immune response in immunized animals but antibody titre was significantly higher in the group of animals immunized with escheriosomes-encapsulated antigen. These results imply usage of liposome-based adjuvant as potential candidate vaccine capable of eliciting both cell-mediated as well as humoral immune responses. Furthermore, antigen entrapped in escheriosomes stimulates antigen-specific CD4(+) T cell proliferation and also enhances the level of IL-2, IFN-gamma and IL-4 in the immunized animals.
Collapse
Affiliation(s)
- Faisal M Syed
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, 202002, Aligarh, India
| | | | | | | | | |
Collapse
|