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Qiang M, Cai P, Ao M, Li X, Chen Z, Yu L. Polysaccharides from Chinese materia medica: Perspective towards cancer management. Int J Biol Macromol 2023; 224:496-509. [PMID: 36265542 DOI: 10.1016/j.ijbiomac.2022.10.139] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 10/10/2022] [Accepted: 10/15/2022] [Indexed: 11/05/2022]
Abstract
Cancer has always been a focus of global attention, and the difficulty of treatment and poor prognosis have always plagued humanity. Conventional chemotherapeutics and treatment with synthetic disciplines will cause adverse side effects and drug resistance. Therefore, searching for a safe, valid, and clinically effective drug is necessary. At present, some natural compounds have proved to have the potential to fight cancer. Polysaccharides obtained from Chinese materia medica are good anti-cancer ingredients. Polysaccharides are macromolecular compounds of equal or distinct monosaccharides with an α- or β-glycosidic bonds. The anti-cancer activity has been fully demonstrated in vivo and in vitro. However, Chinese materia medica polysaccharides are only used as adjuvant therapy for cancer-related diseases. Hence, this review mainly discusses the chemical composition, biological activity, absorption in vivo, and clinical application of Chinese materia medica polysaccharides. Also, we discussed the anti-cancer mechanism. We also discussed the current research's limitations on treating cancer with Chinese materia medica polysaccharides and insights into future research.
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Affiliation(s)
- Mengqin Qiang
- Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China
| | - Pingjun Cai
- Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China
| | - Mingyue Ao
- Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China
| | - Xing Li
- Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China
| | - Zhimin Chen
- Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.
| | - Lingying Yu
- Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.
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Zhang T, Guo Q, Xin Y, Liu Y. Comprehensive review in moisture retention mechanism of polysaccharides from algae, plants, bacteria and fungus. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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3
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Acetan and Acetan-Like Polysaccharides: Genetics, Biosynthesis, Structure, and Viscoelasticity. Polymers (Basel) 2021; 13:polym13050815. [PMID: 33799945 PMCID: PMC7961339 DOI: 10.3390/polym13050815] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 02/07/2023] Open
Abstract
Bacteria produce a variety of multifunctional polysaccharides, including structural, intracellular, and extracellular polysaccharides. They are attractive for the industrial sector due to their natural origin, sustainability, biodegradability, low toxicity, stability, unique viscoelastic properties, stable cost, and supply. When incorporated into different matrices, they may control emulsification, stabilization, crystallization, water release, and encapsulation. Acetan is an important extracellular water-soluble polysaccharide produced mainly by bacterial species of the genera Komagataeibacter and Acetobacter. Since its original description in Komagataeibacter xylinus, acetan-like polysaccharides have also been described in other species of acetic acid bacteria. Our knowledge on chemical composition of different acetan-like polysaccharides, their viscoelasticity, and the genetic basis for their production has expanded during the last years. Here, we review data on acetan biosynthesis, its molecular structure, genetic organization, and mechanical properties. In addition, we have performed an extended bioinformatic analysis on acetan-like polysaccharide genetic clusters in the genomes of Komagataeibacter and Acetobacter species. The analysis revealed for the first time a second acetan-like polysaccharide genetic cluster, that is widespread in both genera. All species of the Komagataeibacter possess at least one acetan genetic cluster, while it is present in only one third of the Acetobacter species surveyed.
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Shetab Boushehri MA, Lamprecht A. TLR4-Based Immunotherapeutics in Cancer: A Review of the Achievements and Shortcomings. Mol Pharm 2018; 15:4777-4800. [DOI: 10.1021/acs.molpharmaceut.8b00691] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Alf Lamprecht
- Department of Pharmaceutics, Institute of Pharmacy, University of Bonn, D-53121 Bonn, Germany
- PEPITE EA4267, Univ. Bourgonge Franch-Comte, 25030 Besançon, France
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5
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Shi L. Bioactivities, isolation and purification methods of polysaccharides from natural products: A review. Int J Biol Macromol 2016; 92:37-48. [PMID: 27377457 PMCID: PMC7124366 DOI: 10.1016/j.ijbiomac.2016.06.100] [Citation(s) in RCA: 288] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 06/29/2016] [Accepted: 06/30/2016] [Indexed: 12/31/2022]
Abstract
Polysaccharides play multiple roles and have extensive bioactivities in life process and an immense potential in healthcare, food and cosmetic industries, due to their therapeutic effects and relatively low toxicity. This review describes their major functions involved in antitumor, anti-virus, and anti-inflammatory bioactivities. Due to their enormous structural heterogeneity, the approaches for isolation and purification of polysaccharides are distinct from that of the other macromolecules such as proteins, etc. Yet, to achieve the homogeneity is the initial step for studies of polysaccharide structure, pharmacology, and its structure-activity relationships. According to the experiences accumulated by our lab and the published literatures, this review also introduces the methods widely used in isolation and purification of polysaccharides.
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Affiliation(s)
- Lei Shi
- Centre of Innovation, School of Applied Science, Temasek Polytechnic, 21 Tampines Avenue 1, 529757, Singapore.
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6
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Wang F, Yang Y. RETRACTED: Identification of an antitumor immune response of polyhistidine through a toll-like receptor 4-dependent manner. Biochem Biophys Res Commun 2014; 453:148-52. [DOI: 10.1016/j.bbrc.2014.09.078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 09/18/2014] [Indexed: 12/20/2022]
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Yang Y, Wolfram J, Fang X, Shen H, Ferrari M. Polyarginine induces an antitumor immune response through binding to toll-like receptor 4. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:1250-4. [PMID: 24323884 PMCID: PMC4116740 DOI: 10.1002/smll.201302887] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 10/25/2013] [Indexed: 06/03/2023]
Abstract
A novel function of polyarginine as an activator of the immune system is reported. Single-molecule fluorescence imaging and single-molecule force measurements demonstrate that polyarginine binds specifically to the toll-like receptor 4 (TLR4), inducing receptor dimerization and activation. Moreover, polyarginine induced immune activation inhibits tumor growth. These results suggest the potential use of polyarginine for cancer immunotherapy.
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Affiliation(s)
- Yong Yang
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave, Houston, TX, 77030, USA
| | - Joy Wolfram
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave, Houston, TX, 77030, USA
| | - Xiaohong Fang
- Key Laboratory of Molecular Nanostructures and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Haifa Shen
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave, Houston, TX, 77030, USA
| | - Mauro Ferrari
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave, Houston, TX, 77030, USA
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Vannucci L, Krizan J, Sima P, Stakheev D, Caja F, Rajsiglova L, Horak V, Saieh M. Immunostimulatory properties and antitumor activities of glucans (Review). Int J Oncol 2013; 43:357-64. [PMID: 23739801 PMCID: PMC3775562 DOI: 10.3892/ijo.2013.1974] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 05/17/2013] [Indexed: 12/25/2022] Open
Abstract
New foods and natural biological modulators have recently become of scientific interest in the investigation of the value of traditional medical therapeutics. Glucans have an important part in this renewed interest. These fungal wall components are claimed to be useful for various medical purposes and they are obtained from medicinal mushrooms commonly used in traditional Oriental medicine. The immunotherapeutic properties of fungi extracts have been reported, including the enhancement of anticancer immunity responses. These properties are principally related to the stimulation of cells of the innate immune system. The discovery of specific receptors for glucans on dendritic cells (dectin-1), as well as interactions with other receptors, mainly expressed by innate immune cells (e.g., Toll-like receptors, complement receptor-3), have raised new attention toward these products as suitable therapeutic agents. We briefly review the characteristics of the glucans from mycelial walls as modulators of the immunity and their possible use as antitumor treatments.
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Affiliation(s)
- Luca Vannucci
- Laboratory of Immunotherapy, Department of Immunology and Gnotobiology, Institute of Microbiology, Academy of Sciences of Czech Republic, v.v.i., 142 20 Prague 4, Czech Republic.
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Masuda Y, Inoue H, Ohta H, Miyake A, Konishi M, Nanba H. Oral administration of soluble β-glucans extracted from Grifola frondosa induces systemic antitumor immune response and decreases immunosuppression in tumor-bearing mice. Int J Cancer 2013; 133:108-19. [PMID: 23280601 DOI: 10.1002/ijc.27999] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 11/07/2012] [Accepted: 11/22/2012] [Indexed: 12/26/2022]
Abstract
Maitake D (MD)-Fraction is a highly purified soluble β-glucan derived from Grifola frondosa (an oriental edible mushroom). Intraperitoneal (i.p.) injection of MD-Fraction has been reported to inhibit tumor growth via enhancement of the host immune system. In this study, we demonstrated that oral administration of MD-Fraction as well as i.p. injection significantly inhibited tumor growth in murine tumor models. After oral administration, MD-Fraction was not transferred to the blood in its free form but was captured by antigen-presenting cells such as macrophages and dendritic cells (DCs) present in the Peyer's patch. The captured MD-Fraction was then transported to the spleen, thereby inducing the systemic immune response. Our study showed that MD-Fraction directly induced DC maturation via a C-type lectin receptor dectin-1 pathway. The therapeutic response of orally administered MD-Fraction was associated with (i) induced systemic tumor-antigen specific T cell response via dectin-1-dependent activation of DCs, (ii) increased infiltration of the activated T cells into the tumor and (iii) decreased number of tumor-caused immunosuppressive cells such as regulatory T cells and myeloid-derived suppressor cells. Our preclinical study suggests that MD-Fraction is a useful oral therapeutic agent in the management of patients with cancer.
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Affiliation(s)
- Yuki Masuda
- Department of Microbial Chemistry, Kobe Pharmaceutical University, 4-19-1, Motoyama-kitamachi, Higashinada-ku, Kobe, 658-8558, Japan.
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Ueno T, Fujii A, Nagano M, Hou DX, Fujii M. Antitumor and Immunostimulation Effects of Kurozu in Tumor-bearing Mice. J JPN SOC FOOD SCI 2010. [DOI: 10.3136/nskkk.57.408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Takeuchi A, Kamiryou Y, Yamada H, Eto M, Shibata K, Haruna K, Naito S, Yoshikai Y. Oral administration of xanthan gum enhances antitumor activity through Toll-like receptor 4. Int Immunopharmacol 2009; 9:1562-7. [DOI: 10.1016/j.intimp.2009.09.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 09/18/2009] [Accepted: 09/19/2009] [Indexed: 10/20/2022]
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Abstract
Epigenetic modifications of chromatin, such as histone acetylation, are involved in repression of tumor antigens and multiple immune genes that are thought to facilitate tumor escape. The status of acetylation in a cell is determined by the balance of the activities of histone acetyltransferases and histone deacetylases. Inhibitors of histone deacetylase (HDACi) can enhance the expression of immunologically important molecules in tumor cells and HDACi treated tumor cells are able to induce immune responses in vitro and in vivo. Systemic HDACi are in clinical trails in cancer and also being used in several autoimmune disease models. To date, 18 HDACs have been reported in human cells and more than thirty HDACi identified, although only a few immune targets of these inhibitors have been identified. Here, we discuss the molecular pathways employed by HDACi and their potential role in inducing immune responses against tumors. We review data suggesting that selection of target specific HDACi and combinations with other agents and modalities, including those that activate stress pathways, may further enhance the efficacy of epigenetic therapies.
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Khan ANH, Magner WJ, Tomasi TB. An epigenetic vaccine model active in the prevention and treatment of melanoma. J Transl Med 2007; 5:64. [PMID: 18070359 PMCID: PMC2231344 DOI: 10.1186/1479-5876-5-64] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2007] [Accepted: 12/10/2007] [Indexed: 01/08/2023] Open
Abstract
Background Numerous immune genes are epigenetically silenced in tumor cells and agents such as histone deacetylase inhibitors (HDACi), which reverse these effects, could potentially be used to develop therapeutic vaccines. The conversion of cancer cells to antigen presenting cells (APCs) by HDACi treatment could potentially provide an additional pathway, together with cross-presentation of tumor antigens by host APCs, to establish tumor immunity. Methods HDACi-treated B16 melanoma cells were used in a murine vaccine model, lymphocyte subset depletion, ELISpot and Cytotoxicity assays were employed to evaluate immunity. Antigen presentation assays, vaccination with isolated apoptotic preparations and tumorigenesis in MHC-deficient mice and radiation chimeras were performed to elucidate the mechanisms of vaccine-induced immunity. Results HDACi treatment enhanced the expression of MHC class II, CD40 and B7-1/2 on B16 cells and vaccination with HDACi-treated melanoma cells elicited tumor specific immunity in both prevention and treatment models. Cytotoxic and IFN-γ-producing cells were identified in splenocytes and CD4+, CD8+ T cells and NK cells were all involved in the induction of immunity. Apoptotic cells derived from HDACi treatments, but not H2O2, significantly enhanced the effectiveness of the vaccine. HDACi-treated B16 cells become APCs in vitro and studies in chimeras defective in cross presentation demonstrate direct presentation in vivo and short-term but not memory responses and long-term immunity. Conclusion The efficacy of this vaccine derives mainly from cross-presentation which is enhanced by HDACi-induced apoptosis. Additionally, epigenetic activation of immune genes may contribute to direct antigen presentation by tumor cells. Epigenetically altered cancer cells should be further explored as a vaccine strategy.
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Affiliation(s)
- A Nazmul H Khan
- Laboratory of Molecular Medicine, Department of Immunology, Roswell Park Cancer Institute, Buffalo, NY, USA.
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Hussein MR. Tumour-associated macrophages and melanoma tumourigenesis: integrating the complexity. Int J Exp Pathol 2006; 87:163-76. [PMID: 16709225 PMCID: PMC2517364 DOI: 10.1111/j.1365-2613.2006.00478.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
When the body discovers a tumour cell (foreign antigen), several kinds of mechanisms and cells operate in what is called an immune response. The latter has evolved into two mechanisms: non-specific immunity and specific immunity, which are closely linked to and influence each other. The former represents the first line of defence against neoplastic cells. The adaptive (specific) immunity is orchestrated by antigen-specific T and B lymphocytes. The effector cells of innate immunity include granulocytes, macrophages and natural killer cells. Among these cells, macrophages represent the most important part of innate immunity against tumours. Tumour-associated macrophages (TAMs) are important antigen-presenting cells and as such an understanding of their interactions with tumour cells gives insights into novel therapeutic strategies. In tumours, the effect of TAMs is the outcome of their two concomitantly competing interactions: tumour growth reduction and tumour growth promotion. The macrophage (TAMs) content of melanoma ranges from 0 to 30% and their density increases with increasing tumour thickness. The melanoma cells and TAMs seem to interact with each other through the release of soluble factors that either prevent or enhance tumour growth. For instance, syngeneic macrophages from tumour-bearing mice can inhibit melanoma growth in the nude mice more than the control macrophages. Alternatively, metastatic B16 melanoma cells can produce some macrophage cytotoxic substances that help tumour cells not only escape the host immunosurveillance system but also prevent distant metastasis. Together, these observations suggest opposing effects for these soluble factors in melanoma. To date, little is available in the literature about the interactions between TAMs and melanoma cells. This viewpoint not only tries to examine these interactions but also provides relevant speculations.
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Affiliation(s)
- Mahmoud R Hussein
- Department of Histopathology, Assuit University Hospitals, Faculty of Medicine, Assuit University, Assuit, Egypt.
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Lee KJ, Kim JY, Choi JH, Kim HG, Chung YC, Roh SH, Jeong HG. Inhibition of tumor invasion and metastasis by aqueous extract of the radix of Platycodon grandiflorum. Food Chem Toxicol 2006; 44:1890-6. [PMID: 16890340 DOI: 10.1016/j.fct.2006.06.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2005] [Revised: 06/08/2006] [Accepted: 06/08/2006] [Indexed: 11/18/2022]
Abstract
Platycodon grandiflorum is a traditional oriental herbal medicine that is known for its immunostimulatory and anti-tumor effects. This study examined the anti-metastatic activities of an aqueous extract from the root of P. grandiflorum (Changkil: CK) using in vitro and in vivo metastasis assays. CK inhibited the invasion of B16-F10 melanoma cells through a reconstituted basement membrane (Matrigel)-coated filter, and strongly inhibited the adhesion of B16-F10 melanoma cell to extracellular matrices such as Matrigel, fibronectin and laminin substrates. CK also inhibited an experimentally induced lung cancer and prolonged the survival time in vivo. In addition, CK augmented NK cell activity. These results show that CK can reduce the extent of a lung metastasis of B16-F10 melanoma cells by inhibiting the adhesion of tumor cells to the basement membrane possibly and activating NK cells.
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Affiliation(s)
- Kyung Jin Lee
- Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University, 375 Seosuk-dong, Kwangju 501-759, South Korea
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Capobianco A, Rovere-Querini P, Rugarli C, Manfredi AA. Melanoma cells interfere with the interaction of dendritic cells with NK/LAK cells. Int J Cancer 2006; 119:2861-9. [PMID: 16998790 DOI: 10.1002/ijc.22279] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Dendritic cells (DCs) and natural killer (NK) cells are key players at the interface between innate resistance and acquired immunity. NK cells can induce DC maturation, a differentiation process whereby DCs respond to a environmental stimulus and acquire the ability of eliciting adaptive immunity. Conversely, maturing DCs promote NK functions in vivo and in vitro. This interplay has important consequences on the immune response to pathogens and possibly to neoplastic cells. Here, we show that B16 melanoma cells actively modulate the interaction between DCs derived from bone marrow precursors and NK/LAK cells propagated from the spleen of C57BL/6 mice. DCs increased in a dose-dependent manner the ability of NK/LAK cells to kill melanoma cells and to produce cytokines. This activatory cross-talk entailed the production of IL-18 by DCs and of IFN-gamma by NK/LAK cells. Melanoma cells were not a passive target of NK activity; they regulated the outcome of the interaction between DCs and NK/LAK cells, inhibiting the in vitro production of cytokines as effectively as the genetic deletion of IL-18 or IFN-gamma. Interference with the NK/DC interaction possibly represents a mechanism used by growing tumors to evade the immune response.
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MESH Headings
- Animals
- Cell Communication
- Cell Line, Tumor
- Coculture Techniques
- Cytotoxicity Tests, Immunologic
- Dendritic Cells/cytology
- Dendritic Cells/immunology
- Dendritic Cells/metabolism
- Female
- Interferon-gamma/genetics
- Interferon-gamma/metabolism
- Interleukin-18/genetics
- Interleukin-18/metabolism
- Killer Cells, Lymphokine-Activated/cytology
- Killer Cells, Lymphokine-Activated/immunology
- Killer Cells, Lymphokine-Activated/metabolism
- Killer Cells, Natural/cytology
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Male
- Melanoma/immunology
- Melanoma/metabolism
- Melanoma/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Time Factors
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- Annalisa Capobianco
- Department of Oncology, Cancer Immunotherapy and Gene Therapy Program, Clinical Immunology Unit, H San Raffaele Scientific Institute & Vita-Salute San Raffaele University, Milano, Italy
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Mizubuchi H, Yajima T, Aoi N, Tomita T, Yoshikai Y. Isomalto-oligosaccharides polarize Th1-like responses in intestinal and systemic immunity in mice. J Nutr 2005; 135:2857-61. [PMID: 16317132 DOI: 10.1093/jn/135.12.2857] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Isomalto-oligosaccharides (IMO) belong to a group of prebiotics that significantly increase the number of protective gut microflora. In the present study, we investigated the effects of IMO on intestinal and systemic immunity in mice. When mice were fed a diet supplemented with 20% IMO for 4 wk, the number of lactobacilli and the levels of IgA in feces were greater than those of mice fed the control diet (P < 0.05). Interferon-gamma (IFN-gamma) production by intestinal intraepithelial lymphocytes (i-IEL) in response to T-cell receptor (TCR) triggering was greater in mice fed IMO than in controls (P < 0.05), indicating T helper-1 (Th1) polarization of intestinal immunity by IMO. The proportion of natural killer (NK) T cells in the liver mononuclear cells (MNC), and the production of IFN-gamma by the liver MNC in response to TCR triggering were greater in mice fed IMO than in controls (P < 0.05), suggesting that the Th1/Th2 balance was shifted toward the Th1 lineage by IMO in systemic immunity. Furthermore, the proportion and activity of NK cells were greater in the spleens of the mice fed IMO than in the controls. Dietary IMO protected the mice from gamma-irradiation-induced lethality, accompanied by an inhibition of the translocation of Enterobacteriaceae. Notably, when mouse macrophage-like J774.1 cells were cultured with Lactobacillus gasseri in the presence of IMO, interleukin (IL)-12 production was greater than in the absence of IMO. These results suggest that IMO, in synergy with lactobacilli, upregulate the Th1 response and beneficially modulate host defense.
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Affiliation(s)
- Hiroyuki Mizubuchi
- Division of Host Defense, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan.
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