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Toney NJ, Schlom J, Donahue RN. Phosphoflow cytometry to assess cytokine signaling pathways in peripheral immune cells: potential for inferring immune cell function and treatment response in patients with solid tumors. J Exp Clin Cancer Res 2023; 42:247. [PMID: 37741983 PMCID: PMC10517546 DOI: 10.1186/s13046-023-02802-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/17/2023] [Indexed: 09/25/2023] Open
Abstract
Tumor biopsy is often not available or difficult to obtain in patients with solid tumors. Investigation of the peripheral immune system allows for in-depth and dynamic profiling of patient immune response prior to and over the course of treatment and disease. Phosphoflow cytometry is a flow cytometry‒based method to detect levels of phosphorylated proteins in single cells. This method can be applied to peripheral immune cells to determine responsiveness of signaling pathways in specific immune subsets to cytokine stimulation, improving on simply defining numbers of populations of cells based on cell surface markers. Here, we review studies using phosphoflow cytometry to (a) investigate signaling pathways in cancer patients' peripheral immune cells compared with healthy donors, (b) compare immune cell function in peripheral immune cells with the tumor microenvironment, (c) determine the effects of agents on the immune system, and (d) predict cancer patient response to treatment and outcome. In addition, we explore the use and potential of phosphoflow cytometry in preclinical cancer models. We believe this review is the first to provide a comprehensive summary of how phosphoflow cytometry can be applied in the field of cancer immunology, and demonstrates that this approach holds promise in exploring the mechanisms of response or resistance to immunotherapy both prior to and during the course of treatment. Additionally, it can help identify potential therapeutic avenues that can restore normal immune cell function and improve cancer patient outcome.
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Affiliation(s)
- Nicole J Toney
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jeffrey Schlom
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Renee N Donahue
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
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Cao HH, Liu DY, Lai YC, Chen YY, Yu LZ, Shao M, Liu JS. Inhibition of the STAT3 Signaling Pathway Contributes to the Anti-Melanoma Activities of Shikonin. Front Pharmacol 2020; 11:748. [PMID: 32536866 PMCID: PMC7267064 DOI: 10.3389/fphar.2020.00748] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 05/05/2020] [Indexed: 12/24/2022] Open
Abstract
Background Malignant melanoma is an extremely aggressive and metastatic cancer, and highly resistant to conventional therapies. Signal transducer and activator of transcription 3 (STAT3) signaling promotes melanoma development and progression, which has been validated as an effective target in melanoma treatment. Natural naphthoquinone shikonin is reported to exert anti-melanoma effects. However, the underlying mechanisms have not been fully elucidated. Purpose This study aims to evaluate the anti-melanoma activities of shikonin and explore the involvement of STAT3 signaling in these effects. Methods Zebrafish tumor model was established to evaluate the anti-human melanoma effects of shikonin in vivo. MTT assay and colony formation assay were employed to investigate the anti-proliferative effects of shikonin on human melanoma A375 and A2058 cells. Flow cytometry was used to analyze cell cycle distribution and apoptosis induction. Wound healing assay and Transwell chamber assay were conducted to examine the cell migratory and invasive abilities. Immunofluorescence assay was used to observe F-actin, Tubulin, and STAT3 localization. Western blotting was used to determine the expression levels of proteins associated with apoptosis and key proteins in the STAT3 signaling pathway. Immunoblotting was performed in DSS cross-linked cells to determine the homo-dimerization of STAT3. Gelatin zymography was employed to evaluate the enzymatic activity of MMP-2 and MMP-9. Transient transfection was used to overexpress STAT3 in cell models. Results Shikonin suppressed melanoma growth in cultured cells and in zebrafish xenograft models. Shikonin induced melanoma cells apoptosis, inhibited cell migration and invasion. Mechanistic study indicated that shikonin inhibited the phosphorylation and homo-dimerization of STAT3, thus reduced its nuclear localization. Further study showed that shikonin decreased the levels of STAT3-targeted genes Mcl-1, Bcl-2, MMP-2, vimentin, and Twist, which are involved in melanoma survival, migration, and invasion. More importantly, overexpression of constitutively active STAT3 partially abolished the anti-proliferative, anti-migratory, and anti-invasive effects of shikonin. Conclusion The anti-melanoma activity of shikonin is at least partially attributed to the inhibition on STAT3 signaling. These findings provide new insights into the anti-melanoma molecular mechanisms of shikonin, suggesting its potential in melanoma treatment.
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Affiliation(s)
- Hui-Hui Cao
- Traditional Chinese Pharmacological, Third Level Research Laboratory of State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Dong-Yi Liu
- Traditional Chinese Pharmacological, Third Level Research Laboratory of State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Ye-Cai Lai
- Guangzhou BaiYunShan Pharmaceutical General Factory, Guangzhou BaiYunShan Pharmaceutical Holdings Co., Ltd., Guangzhou, China
| | - Yu-Yao Chen
- Traditional Chinese Pharmacological, Third Level Research Laboratory of State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Lin-Zhong Yu
- Traditional Chinese Pharmacological, Third Level Research Laboratory of State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Meng Shao
- Traditional Chinese Pharmacological, Third Level Research Laboratory of State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Jun-Shan Liu
- Traditional Chinese Pharmacological, Third Level Research Laboratory of State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
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Fitch Z, Schmitz R, Kwun J, Hering B, Madsen J, Knechtle SJ. Transplant research in nonhuman primates to evaluate clinically relevant immune strategies in organ transplantation. Transplant Rev (Orlando) 2019; 33:115-129. [PMID: 31027947 PMCID: PMC6599548 DOI: 10.1016/j.trre.2019.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/08/2019] [Accepted: 03/26/2019] [Indexed: 12/27/2022]
Abstract
Research in transplant immunology using non-human primate (NHP) species to evaluate immunologic strategies to prevent rejection and prolong allograft survival has yielded results that have translated successfully into human organ transplant patient management. Other therapies have not proceeded to human translation due to failure in NHP testing, arguably sparing humans the futility and risk of such testing. The NHP transplant models are ethically necessary for drug development in this field and provide the closest analogue to human transplant patients available. The refinement of this resource with respect to colony MHC typing, reagent and assay development, and availability to the research community has greatly enhanced knowledge about transplant immunology and drug development.
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Affiliation(s)
- Zachary Fitch
- Department of Surgery, Duke Transplant Center, Durham, NC 27710, USA; Center for Transplantation Sciences, Division of Cardiac Surgery, Department of Surgery, Massachusetts General Hospital, White 510c, 55 Fruit Street, Boston, MA, USA
| | - Robin Schmitz
- Department of Surgery, Duke Transplant Center, Durham, NC 27710, USA
| | - Jean Kwun
- Department of Surgery, Duke Transplant Center, Durham, NC 27710, USA
| | - Bernhard Hering
- Schulze Diabetes Institute, Department of Surgery, University of Minnesota, Minneapolis, MN, USA
| | - Joren Madsen
- Department of Surgery, Duke Transplant Center, Durham, NC 27710, USA
| | - Stuart J Knechtle
- Department of Surgery, Duke Transplant Center, Durham, NC 27710, USA.
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Mattina J, Carlisle B, Hachem Y, Fergusson D, Kimmelman J. Inefficiencies and Patient Burdens in the Development of the Targeted Cancer Drug Sorafenib: A Systematic Review. PLoS Biol 2017; 15:e2000487. [PMID: 28158308 PMCID: PMC5291369 DOI: 10.1371/journal.pbio.2000487] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 01/06/2017] [Indexed: 02/06/2023] Open
Abstract
Failure in cancer drug development exacts heavy burdens on patients and research systems. To investigate inefficiencies and burdens in targeted drug development in cancer, we conducted a systematic review of all prelicensure trials for the anticancer drug, sorafenib (Bayer/Onyx Pharmaceuticals). We searched Embase and MEDLINE databases on October 14, 2014, for prelicensure clinical trials testing sorafenib against cancers. We measured risk by serious adverse event rates, benefit by objective response rates and survival, and trial success by prespecified primary endpoint attainment with acceptable toxicity. The first two clinically useful applications of sorafenib were discovered in the first 2 efficacy trials, after five drug-related deaths (4.6% of 108 total) and 93 total patient-years of involvement (2.4% of 3,928 total). Thereafter, sorafenib was tested in 26 indications and 67 drug combinations, leading to one additional licensure. Drug developers tested 5 indications in over 5 trials each, comprising 56 drug-related deaths (51.8% of 108 total) and 1,155 patient-years (29.4% of 3,928 total) of burden in unsuccessful attempts to discover utility against these malignancies. Overall, 32 Phase II trials (26% of Phase II activity) were duplicative, lacked appropriate follow-up, or were uninformative because of accrual failure, constituting 1,773 patients (15.6% of 11,355 total) participating in prelicensure sorafenib trials. The clinical utility of sorafenib was established early in development, with low burden on patients and resources. However, these early successes were followed by rapid and exhaustive testing against various malignancies and combination regimens, leading to excess patient burden. Our evaluation of sorafenib development suggests many opportunities for reducing costs and unnecessary patient burden in cancer drug development.
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Affiliation(s)
- James Mattina
- Studies of Translation, Ethics and Medicine (STREAM), Biomedical Ethics Unit, McGill University, Montréal, Quebec, Canada
| | - Benjamin Carlisle
- Studies of Translation, Ethics and Medicine (STREAM), Biomedical Ethics Unit, McGill University, Montréal, Quebec, Canada
| | - Yasmina Hachem
- Studies of Translation, Ethics and Medicine (STREAM), Biomedical Ethics Unit, McGill University, Montréal, Quebec, Canada
| | - Dean Fergusson
- Department of Clinical Epidemiology, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Jonathan Kimmelman
- Studies of Translation, Ethics and Medicine (STREAM), Biomedical Ethics Unit, McGill University, Montréal, Quebec, Canada
- * E-mail:
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Porta C, Toscani I, Czarnecka AM, Szczylik CA. Immuno-oncology for renal cell carcinoma treatment: future perspectives for combinations and sequences with molecularly targeted agents. Expert Opin Biol Ther 2016; 17:151-162. [PMID: 27960591 DOI: 10.1080/14712598.2017.1271869] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION From a theoretical viewpoint, combining molecularly targeted agents endowed with antiangiogenic properties with immunotherapy makes sense in treatment of metastatic renal cell carcinoma (RCC); this neoplasm is highly angiogenesis-dependent, as well as potentially immunogenic. Areas covered: The authors performed a literature search looking for clinical trials aimed at evaluating efficacy and tolerability of combinations (or sequences) of molecularly targeted agents and different immunotherapeutic approaches in metastatic RCC. Expert opinion: Combinations of molecularly targeted agents with old immunotherapeutics (i.e., cytokines) seem to add little to the presently available treatment standards (mainly monotherapy with targeted agents). Newer combinations with immune checkpoint inhibitors are promising but cumulative toxicity is an important issue, although highly dependent on the different companion drugs. Combinations with vaccines are ongoing, but first available data are not encouraging. A more thorough comprehension of the complex effects of these combinations on the immune system is mandatory to develop less empiric treatments.
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Affiliation(s)
- Camillo Porta
- a Medical Oncology , I.R.C.C.S. San Matteo University Hospital Foundation , Pavia , Italy.,b Italian Group of Onco-Nephrology/Gruppo Italiano di Onco-Nefrologia (G.I.O.N.) , Pavia , Italy
| | - Ilaria Toscani
- a Medical Oncology , I.R.C.C.S. San Matteo University Hospital Foundation , Pavia , Italy
| | - Anna M Czarnecka
- c Department of Oncology , Military Institute of Medicine , Warsaw , Poland
| | - Cezary A Szczylik
- c Department of Oncology , Military Institute of Medicine , Warsaw , Poland
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Kalathil SG, Lugade AA, Miller A, Iyer R, Thanavala Y. PD-1 + and Foxp3 + T cell reduction correlates with survival of HCC patients after sorafenib therapy. JCI Insight 2016; 1. [PMID: 27540594 DOI: 10.1172/jci.insight.86182] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Sorafenib is an oral antiangiogenic agent administered in advanced-stage hepatocellular carcinoma (HCC). Based on preclinical and human studies, we hypothesized that, in addition to its antiangiogenic properties, sorafenib may beneficially reduce the extent of the immunosuppressive network in HCC patients. To test this hypothesis, we examined whether alterations in the immunosuppressive burden of advanced-stage HCC patients correlated with clinical outcome. METHODS In before and after sorafenib treatment, blood samples collected from 19 patients with advanced HCC, the frequency of PD-1+ T cells, Tregs, and myeloid derived suppressor cells (MDSC) were quantified by multiparameter FACS. Cytokine levels in plasma were determined by ELISA. RESULTS Overall survival (OS) was significantly impacted by the reduction in the absolute number of both CD4+PD-1+ T cells and CD8+PD-1+ T cells following sorafenib treatment. Significant decreases in the frequency and absolute number of Foxp3+ Tregs were also observed, and a statistically significant improvement in OS was noted in patients exhibiting a greater decrease in the number of Foxp3+ Tregs. The ratio of CD4+CD127+PD-1- T effector cells to CD4+Foxp3+PD-1+ Tregs was significantly increased following treatment with sorafenib. Increased frequency of CD4+CD127+ T effector cells in the posttreatment samples significantly correlated with OS. CONCLUSION This study is the first to our knowledge to demonstrate the potent immunomodulatory effects of sorafenib therapy on PD-1+ T cells and Tregs and the ensuing correlation with survival. These phenotypes could serve as predictive biomarkers to identify HCC patients who are likely to benefit from sorafenib treatment. TRIAL REGISTRATION Registration is not required for observational studies. FUNDING This study was supported by NCI Core Grant to RPCI (NIH P30 CA016056) and discretionary funds to Y. Thanavala.
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Affiliation(s)
- Suresh Gopi Kalathil
- Department of Immunology, Roswell Park Cancer Institute (RPCI), Buffalo, New York, USA
| | - Amit Anand Lugade
- Department of Immunology, Roswell Park Cancer Institute (RPCI), Buffalo, New York, USA
| | - Austin Miller
- Department of Biostatistics and Bioinformatics, Roswell Park Cancer Institute (RPCI), Buffalo, New York, USA
| | - Renuka Iyer
- Department of Medicine, Roswell Park Cancer Institute (RPCI), Buffalo, New York, USA
| | - Yasmin Thanavala
- Department of Immunology, Roswell Park Cancer Institute (RPCI), Buffalo, New York, USA
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Yamada Y, Nadazdin O, Boskovic S, Lee S, Zorn E, Smith RN, Colvin RB, Madsen JC, Cosimi AB, Kawai T, Benichou G. Repeated Injections of IL-2 Break Renal Allograft Tolerance Induced via Mixed Hematopoietic Chimerism in Monkeys. Am J Transplant 2015; 15:3055-66. [PMID: 26190648 PMCID: PMC4654979 DOI: 10.1111/ajt.13382] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 04/20/2015] [Accepted: 05/11/2015] [Indexed: 01/25/2023]
Abstract
Tolerance of allografts achieved in mice via stable mixed hematopoietic chimerism relies essentially on continuous elimination of developing alloreactive T cells in the thymus (central deletion). Conversely, while only transient mixed chimerism is observed in nonhuman primates and patients, it is sufficient to ensure tolerance of kidney allografts. In this setting, it is likely that tolerance depends on peripheral regulatory mechanisms rather than thymic deletion. This implies that, in primates, upsetting the balance between inflammatory and regulatory alloimmunity could abolish tolerance and trigger the rejection of previously accepted renal allografts. In this study, six monkeys that were treated with a mixed chimerism protocol and had accepted a kidney allograft for periods of 1-10 years after withdrawal of immunosuppression received subcutaneous injections of IL-2 cytokine (0.6-3 × 10(6) IU/m(2) ). This resulted in rapid rejection of previously tolerated renal transplants and was associated with an expansion and reactivation of alloreactive pro-inflammatory memory T cells in the host's lymphoid organs and in the graft. This phenomenon was prevented by anti-CD8 antibody treatment. Finally, this process was reversible in that cessation of IL-2 administration aborted the rejection process and restored normal kidney graft function.
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Affiliation(s)
- Y. Yamada
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - O. Nadazdin
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - S. Boskovic
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - S. Lee
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - E. Zorn
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - R. N. Smith
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - R. B. Colvin
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - J. C. Madsen
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - A. B. Cosimi
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - T. Kawai
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA
| | - G. Benichou
- Department of Surgery, Center for Transplantation Sciences, Harvard Medical School, Boston, MA,Corresponding author: Gilles Benichou,
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Oura T, Hotta K, Cosimi AB, Kawai T. Transient mixed chimerism for allograft tolerance. CHIMERISM 2015; 6:21-6. [PMID: 26517761 PMCID: PMC5064472 DOI: 10.1080/19381956.2015.1111975] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 10/13/2015] [Accepted: 10/15/2015] [Indexed: 10/22/2022]
Abstract
Mixed chimerism discovered in Freemartin cattle by Ray Owen 70 years ago paved the way for research on immune tolerance. Since his discovery, significant progress has been made in the effort to induce allograft tolerance via mixed chimerism in various murine models. However, induction of persistent mixed chimerism has proved to be extremely difficult in major histocompatibility complex mismatched humans. Chimerism induced in humans tends to either disappear or convert to full donor chimerism, depending on the intensity of the conditioning regimen. Nevertheless, our studies in both NHPs and humans have clearly demonstrated that renal allograft tolerance can be induced by transient mixed chimerism. Our studies have shown that solid organ allograft tolerance via transient mixed chimerism 1) requires induction of multilineage hematologic chimerism, 2) depends on peripheral regulatory mechanisms, rather than thymic deletion, for long-term maintenance, 3) is organ specific (kidney and lung but not heart allograft tolerance are feasible). A major advantage of tolerance induction via transient mixed chimerism is exclusion of the risk of graft-versus-host disease. Our ongoing studies are directed toward improving the consistency of tolerance induction, reducing the morbidity of the conditioning regimen, substituting clinically available agents, such as Belatacept for the now unavailable anti-CD2 monoclonal antibody, and extending the protocol to recipients of deceased donor allografts.
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Affiliation(s)
- Tetsu Oura
- Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Kiyohiko Hotta
- Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - A. B. Cosimi
- Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Tatsuo Kawai
- Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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Kondo Y, Shimosegawa T. Significant roles of regulatory T cells and myeloid derived suppressor cells in hepatitis B virus persistent infection and hepatitis B virus-related HCCs. Int J Mol Sci 2015; 16:3307-22. [PMID: 25654227 PMCID: PMC4346897 DOI: 10.3390/ijms16023307] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 01/26/2015] [Accepted: 01/28/2015] [Indexed: 12/12/2022] Open
Abstract
The adaptive immune system, including type1 helper T cells (Th1 cells), cytotoxic T lymphocytes (CTLs), and dendritic cells (DCs), plays an important role in the control of hepatitis B virus (HBV). On the other hand, regulatory T cells (Tregs) and myeloid derived suppressor cells (MDSCs) suppress the immune reaction in HBV and hepatocellular carcinoma (HCC). Excessive activation of immune suppressive cells could contribute to the persistent infection of HBV and the progression of HCC. The frequency and/or function of Tregs could affect the natural course in chronic hepatitis B patients and the treatment response. In addition to the suppressive function of MDSCs, MDSCs could affect the induction and function of Tregs. Therefore, we should understand in detail the mechanism by which Tregs and MDSCs are induced to control HBV persistent infection and HBV-related HCC. Immune suppressive cells, including Tregs and MDSCs, contribute to the difficulty in inducing an effective immune response for HBV persistent infection and HBV-related HCC. In this review, we focus on the Tregs and MDSCs that could be potential targets for immune therapy of chronic hepatitis B and HBV-related HCC.
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Affiliation(s)
- Yasuteru Kondo
- Division of Gastroenterology, Tohoku University Graduate School of Medicine 1-1 Seiryo, Aoba, Sendai City, Miyagi 980-8574, Japan.
| | - Tooru Shimosegawa
- Division of Gastroenterology, Tohoku University Graduate School of Medicine 1-1 Seiryo, Aoba, Sendai City, Miyagi 980-8574, Japan.
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Messmer MN, Netherby CS, Banik D, Abrams SI. Tumor-induced myeloid dysfunction and its implications for cancer immunotherapy. Cancer Immunol Immunother 2014; 64:1-13. [PMID: 25432147 DOI: 10.1007/s00262-014-1639-3] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 11/19/2014] [Indexed: 01/27/2023]
Abstract
Immune function relies on an appropriate balance of the lymphoid and myeloid responses. In the case of neoplasia, this balance is readily perturbed by the dramatic expansion of immature or dysfunctional myeloid cells accompanied by a reciprocal decline in the quantity/quality of the lymphoid response. In this review, we seek to: (1) define the nature of the atypical myelopoiesis observed in cancer patients and the impact of this perturbation on clinical outcomes; (2) examine the potential mechanisms underlying these clinical manifestations; and (3) explore potential strategies to restore normal myeloid cell differentiation to improve activation of the host antitumor immune response. We posit that fundamental alterations in myeloid homeostasis triggered by the neoplastic process represent critical checkpoints that govern therapeutic efficacy, as well as offer novel cellular-based biomarkers for tracking changes in disease status or relapse.
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Affiliation(s)
- Michelle N Messmer
- Department of Immunology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, 14263, USA
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