1
|
Fu Y, Xiang Y, Zha J, Chen G, Dong Z. Enhanced STAT3/PIK3R1/mTOR signaling triggers tubular cell inflammation and apoptosis in septic-induced acute kidney injury: implications for therapeutic intervention. Clin Sci (Lond) 2024; 138:351-369. [PMID: 38411015 DOI: 10.1042/cs20240059] [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: 01/10/2024] [Revised: 02/20/2024] [Accepted: 02/26/2024] [Indexed: 02/28/2024]
Abstract
Septic acute kidney injury (AKI) is a severe form of renal dysfunction associated with high morbidity and mortality rates. However, the pathophysiological mechanisms underlying septic AKI remain incompletely understood. Herein, we investigated the signaling pathways involved in septic AKI using the mouse models of lipopolysaccharide (LPS) treatment and cecal ligation and puncture (CLP). In these models, renal inflammation and tubular cell apoptosis were accompanied by the aberrant activation of the mechanistic target of rapamycin (mTOR) and the signal transducer and activator of transcription 3 (STAT3) signaling pathways. Pharmacological inhibition of either mTOR or STAT3 significantly improved renal function and reduced apoptosis and inflammation. Interestingly, inhibition of STAT3 with pharmacological inhibitors or small interfering RNA blocked LPS-induced mTOR activation in renal tubular cells, indicating a role of STAT3 in mTOR activation. Moreover, knockdown of STAT3 reduced the expression of the phosphoinositide-3-kinase regulatory subunit 1 (PIK3R1/p85α), a key subunit of the phosphatidylinositol 3-kinase for AKT and mTOR activation. Chromatin immunoprecipitation assay also proved the binding of STAT3 to PIK3R1 gene promoter in LPS-treated kidney tubular cells. In addition, knockdown of PIK3R1 suppressed mTOR activation during LPS treatment. These findings highlight the dysregulation of mTOR and STAT3 pathways as critical mechanisms underlying the inflammatory and apoptotic phenotypes observed in renal tubular cells during septic AKI, suggesting the STAT3/ PIK3R1/mTOR pathway as a therapeutic target of septic AKI.
Collapse
Affiliation(s)
- Ying Fu
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - Yu Xiang
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - Jie Zha
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - Guochun Chen
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - Zheng Dong
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha 410011, China
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University and Charlie Norwood VA Medical Center, Augusta, GA, U.S.A
| |
Collapse
|
2
|
Panwar V, Singh A, Bhatt M, Tonk RK, Azizov S, Raza AS, Sengupta S, Kumar D, Garg M. Multifaceted role of mTOR (mammalian target of rapamycin) signaling pathway in human health and disease. Signal Transduct Target Ther 2023; 8:375. [PMID: 37779156 PMCID: PMC10543444 DOI: 10.1038/s41392-023-01608-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/25/2023] [Accepted: 08/14/2023] [Indexed: 10/03/2023] Open
Abstract
The mammalian target of rapamycin (mTOR) is a protein kinase that controls cellular metabolism, catabolism, immune responses, autophagy, survival, proliferation, and migration, to maintain cellular homeostasis. The mTOR signaling cascade consists of two distinct multi-subunit complexes named mTOR complex 1/2 (mTORC1/2). mTOR catalyzes the phosphorylation of several critical proteins like AKT, protein kinase C, insulin growth factor receptor (IGF-1R), 4E binding protein 1 (4E-BP1), ribosomal protein S6 kinase (S6K), transcription factor EB (TFEB), sterol-responsive element-binding proteins (SREBPs), Lipin-1, and Unc-51-like autophagy-activating kinases. mTOR signaling plays a central role in regulating translation, lipid synthesis, nucleotide synthesis, biogenesis of lysosomes, nutrient sensing, and growth factor signaling. The emerging pieces of evidence have revealed that the constitutive activation of the mTOR pathway due to mutations/amplification/deletion in either mTOR and its complexes (mTORC1 and mTORC2) or upstream targets is responsible for aging, neurological diseases, and human malignancies. Here, we provide the detailed structure of mTOR, its complexes, and the comprehensive role of upstream regulators, as well as downstream effectors of mTOR signaling cascades in the metabolism, biogenesis of biomolecules, immune responses, and autophagy. Additionally, we summarize the potential of long noncoding RNAs (lncRNAs) as an important modulator of mTOR signaling. Importantly, we have highlighted the potential of mTOR signaling in aging, neurological disorders, human cancers, cancer stem cells, and drug resistance. Here, we discuss the developments for the therapeutic targeting of mTOR signaling with improved anticancer efficacy for the benefit of cancer patients in clinics.
Collapse
Affiliation(s)
- Vivek Panwar
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India
| | - Aishwarya Singh
- Amity Institute of Molecular Medicine and Stem Cell Research (AIMMSCR), Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh, 201313, India
| | - Manini Bhatt
- Department of Biomedical Engineering, Indian Institute of Technology, Ropar, Punjab, 140001, India
| | - Rajiv K Tonk
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University (DPSRU), New Delhi, 110017, India
| | - Shavkatjon Azizov
- Laboratory of Biological Active Macromolecular Systems, Institute of Bioorganic Chemistry, Academy of Sciences Uzbekistan, Tashkent, 100125, Uzbekistan
- Faculty of Life Sciences, Pharmaceutical Technical University, 100084, Tashkent, Uzbekistan
| | - Agha Saquib Raza
- Rajive Gandhi Super Speciality Hospital, Tahirpur, New Delhi, 110093, India
| | - Shinjinee Sengupta
- Amity Institute of Molecular Medicine and Stem Cell Research (AIMMSCR), Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh, 201313, India.
| | - Deepak Kumar
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India.
| | - Manoj Garg
- Amity Institute of Molecular Medicine and Stem Cell Research (AIMMSCR), Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh, 201313, India.
| |
Collapse
|
3
|
Duraiswamy J, Turrini R, Minasyan A, Barras D, Crespo I, Grimm AJ, Casado J, Genolet R, Benedetti F, Wicky A, Ioannidou K, Castro W, Neal C, Moriot A, Renaud-Tissot S, Anstett V, Fahr N, Tanyi JL, Eiva MA, Jacobson CA, Montone KT, Westergaard MCW, Svane IM, Kandalaft LE, Delorenzi M, Sorger PK, Färkkilä A, Michielin O, Zoete V, Carmona SJ, Foukas PG, Powell DJ, Rusakiewicz S, Doucey MA, Dangaj Laniti D, Coukos G. Myeloid antigen-presenting cell niches sustain antitumor T cells and license PD-1 blockade via CD28 costimulation. Cancer Cell 2021; 39:1623-1642.e20. [PMID: 34739845 PMCID: PMC8861565 DOI: 10.1016/j.ccell.2021.10.008] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 07/06/2021] [Accepted: 10/15/2021] [Indexed: 12/15/2022]
Abstract
The mechanisms regulating exhaustion of tumor-infiltrating lymphocytes (TIL) and responsiveness to PD-1 blockade remain partly unknown. In human ovarian cancer, we show that tumor-specific CD8+ TIL accumulate in tumor islets, where they engage antigen and upregulate PD-1, which restrains their functions. Intraepithelial PD-1+CD8+ TIL can be, however, polyfunctional. PD-1+ TIL indeed exhibit a continuum of exhaustion states, with variable levels of CD28 costimulation, which is provided by antigen-presenting cells (APC) in intraepithelial tumor myeloid niches. CD28 costimulation is associated with improved effector fitness of exhausted CD8+ TIL and is required for their activation upon PD-1 blockade, which also requires tumor myeloid APC. Exhausted TIL lacking proper CD28 costimulation in situ fail to respond to PD-1 blockade, and their response may be rescued by local CTLA-4 blockade and tumor APC stimulation via CD40L.
Collapse
Affiliation(s)
- Jaikumar Duraiswamy
- Ovarian Cancer Research Center, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Riccardo Turrini
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Aspram Minasyan
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - David Barras
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland; Bioinformatics Core Facility, Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland
| | - Isaac Crespo
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Alizée J Grimm
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Julia Casado
- Research Program of Systems Oncology, University of Helsinki, 00014 Helsinki, Finland
| | - Raphael Genolet
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Fabrizio Benedetti
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Alexandre Wicky
- Center for Precision Oncology, Department of Oncology, CHUV, 1011 Lausanne, Switzerland
| | - Kalliopi Ioannidou
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Wilson Castro
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Christopher Neal
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Amandine Moriot
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Stéphanie Renaud-Tissot
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland; Center of Experimental Therapeutics, Department of Oncology, CHUV, 1011 Lausanne, Switzerland
| | - Victor Anstett
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Noémie Fahr
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Janos L Tanyi
- Ovarian Cancer Research Center, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Monika A Eiva
- Ovarian Cancer Research Center, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Connor A Jacobson
- Harvard Ludwig Center, Laboratory of Systems Pharmacology, Harvard Medical School, Boston, MA 02115, USA
| | - Kathleen T Montone
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | | | - Inge Marie Svane
- National Center for Cancer Immune Therapy, Copenhagen University Hospital, 2730 Herlev, Denmark
| | - Lana E Kandalaft
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland; Center of Experimental Therapeutics, Department of Oncology, CHUV, 1011 Lausanne, Switzerland
| | - Mauro Delorenzi
- Bioinformatics Core Facility, Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland; Department of Oncology, UNIL, 1011 Lausanne, Switzerland
| | - Peter K Sorger
- Harvard Ludwig Center, Laboratory of Systems Pharmacology, Harvard Medical School, Boston, MA 02115, USA
| | - Anniina Färkkilä
- Research Program of Systems Oncology, University of Helsinki, 00014 Helsinki, Finland; Department of Obstetrics and Gynecology, Helsinki University Hospital, 00014 Helsinki, Finland
| | - Olivier Michielin
- Center for Precision Oncology, Department of Oncology, CHUV, 1011 Lausanne, Switzerland
| | - Vincent Zoete
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Santiago J Carmona
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Periklis G Foukas
- 2nd Department of Pathology, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Daniel J Powell
- Ovarian Cancer Research Center, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sylvie Rusakiewicz
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland; Center of Experimental Therapeutics, Department of Oncology, CHUV, 1011 Lausanne, Switzerland
| | - Marie-Agnès Doucey
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Denarda Dangaj Laniti
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - George Coukos
- Ludwig Institute for Cancer Research, Lausanne Branch, Department of Oncology, University of Lausanne (UNIL) and Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland.
| |
Collapse
|
4
|
McIntosh SZ, Quinn KE, Ashley RL. CXCL12 May Drive Inflammatory Potential in the Ovine Corpus Luteum During Implantation. Reprod Sci 2021; 29:122-132. [PMID: 34755321 PMCID: PMC8677687 DOI: 10.1007/s43032-021-00791-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 10/31/2021] [Indexed: 11/01/2022]
Abstract
Adequate corpus luteum (CL) function is paramount to successful pregnancy. Structural and functional CL integrity is controlled by diverse cell types that contribute and respond to the local cytokine milieu. The chemokine ligand 12 (CXCL12) and receptor, CXCR4, are modulators of inflammation and cell survival, but little is understood about CXCL12-CXCR4 axis and CL functional regulation. Corpora lutea from control nonpregnant ewes (n = 5; day 10 estrous cycle (D10C)) and pregnant ewes (n = 5/day) on days 20 (D20P) and 30 (D30P) post-breeding were analyzed for gene and protein expression of CXCL12, CXCR4, and select inflammatory cytokines. In separate cell culture studies, cytokine production was evaluated following CXCL12 treatment. Abundance of CXCL12 and CXCR4 increased (P < 0.05) in pregnant ewes compared to nonpregnant ewes, as determined by a combination of quantitative PCR, immunoblot, and immunofluorescence microscopy. CXCR4 was detected in steroidogenic and nonsteroidogenic cells in ovine CL, and select pro-inflammatory mediators were greater in CL from pregnant ewes. In vitro studies revealed greater abundance of tumor necrosis factor (TNF) following CXCL12 administration (P = 0.05), while P4 levels in cell media were unchanged. Fully functional CL of pregnant ewes is characterized by increased abundance of inflammatory cytokines which may function in a luteotropic manner. We report concurrent increases in CXCL12, CXCR4, and select inflammatory mediators in ovine CL as early pregnancy progresses. We propose CXCL12 stimulates production of select cytokines, rather than P4 in the CL to assist in CL establishment and survival.
Collapse
Affiliation(s)
- Stacia Z McIntosh
- Department of Animal and Range Sciences, New Mexico State University, MSC 3-I, PO Box 30003, Las Cruces, NM, 88003, USA
| | - Kelsey E Quinn
- Department of Animal and Range Sciences, New Mexico State University, MSC 3-I, PO Box 30003, Las Cruces, NM, 88003, USA.,Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, NC, USA
| | - Ryan L Ashley
- Department of Animal and Range Sciences, New Mexico State University, MSC 3-I, PO Box 30003, Las Cruces, NM, 88003, USA.
| |
Collapse
|
5
|
Ranjpour M, Wajid S, Jain SK. Elevated expression of sepiapterin reductase, regulator of G protein signaling 1, hypothetical protein CXorf58 homolog, and zinc finger and BTB domain-containing protein 21 isoform X2 is associated with progression of hepatocellular carcinoma. PROTOPLASMA 2021; 258:1133-1143. [PMID: 33683453 DOI: 10.1007/s00709-021-01632-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Hepatocellular carcinoma (HCC) is one of the most common cancers associated with high mortality rate. Understanding of events leading to HCC pathophysiology is essential for its better management. We earlier reported development of a novel rodent model by administrating chemical carcinogens, DEN, and 2-AAF for study of HCC at very early stage. 2D-Electrophoresis analysis of total serum proteins identified several differentially expressed proteins in animals undergoing tumorigenesis. MALDI-TOF-MS/MS analyses were performed to characterize the differentially expressed proteins. Further real-time PCR analyses were taken place to quantify the transcript expression for the identified proteins at HCC initiation and tumor stages. Considering protein-protein interactions among the experimentally identified proteins and their interacting neighbors, a protein network has been analyzed that provided further insight into molecular events taking place during HCC development. Histological changes confirmed HCC initiation and hepatotumorigenesis at 1 and 4 months post carcinogen treatment, respectively. Four differentially expressed proteins were identified which were further characterized as regulator of G protein signaling 1 (RGS1), sepiapterin reductase (SPR), similar to zinc finger and BTB domain-containing protein 21 isoform X2 (ZNF295), and a hypothetical protein CXorf58 homolog. Quantification of transcripts for these proteins revealed elevation in their expression both at initiation and tumorigenesis stages. The study deciphers the regulatory role of these proteins during HCC progression.
Collapse
Affiliation(s)
- Maryam Ranjpour
- Departmentof Biotechnology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India
| | - Saima Wajid
- Departmentof Biotechnology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India
| | - Swatantra Kumar Jain
- Department of Medical Biochemistry, HIMSR, Jamia Hamdard, New Delhi, 110062, India.
| |
Collapse
|
6
|
Hidradenitis Suppurativa: Where We Are and Where We Are Going. Cells 2021; 10:cells10082094. [PMID: 34440863 PMCID: PMC8392140 DOI: 10.3390/cells10082094] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/11/2021] [Accepted: 08/13/2021] [Indexed: 12/19/2022] Open
Abstract
Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease primarily affecting apocrine gland-rich areas of the body. It is a multifactorial disease in which genetic and environmental factors play a key role. The primary defect in HS pathophysiology involves follicular occlusion of the folliculopilosebaceous unit, followed by follicular rupture and immune responses. Innate pro-inflammatory cytokines (e.g., IL-1β, and TNF-α); mediators of activated T helper (Th)1 and Th17 cells (e.g., IFN-γ, and IL-17); and effector mechanisms of neutrophilic granulocytes, macrophages, and plasma cells are involved. On the other hand, HS lesions contain anti-inflammatory mediators (e.g., IL-10) and show limited activity of Th22 cells. The inflammatory vicious circle finally results in pain, purulence, tissue destruction, and scarring. HS pathogenesis is still enigmatic, and a valid animal model for HS is currently not available. All these aspects represent a challenge for the development of therapeutic approaches, which are urgently needed for this debilitating disease. Available treatments are limited, mostly off-label, and surgical interventions are often required to achieve remission. In this paper, we provide an overview of the current knowledge surrounding HS, including the diagnosis, pathogenesis, treatments, and existing translational studies.
Collapse
|
7
|
Fabian DK, Fuentealba M, Dönertaş HM, Partridge L, Thornton JM. Functional conservation in genes and pathways linking ageing and immunity. IMMUNITY & AGEING 2021; 18:23. [PMID: 33990202 PMCID: PMC8120713 DOI: 10.1186/s12979-021-00232-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 04/06/2021] [Indexed: 12/31/2022]
Abstract
At first glance, longevity and immunity appear to be different traits that have not much in common except the fact that the immune system promotes survival upon pathogenic infection. Substantial evidence however points to a molecularly intertwined relationship between the immune system and ageing. Although this link is well-known throughout the animal kingdom, its genetic basis is complex and still poorly understood. To address this question, we here provide a compilation of all genes concomitantly known to be involved in immunity and ageing in humans and three well-studied model organisms, the nematode worm Caenorhabditis elegans, the fruit fly Drosophila melanogaster, and the house mouse Mus musculus. By analysing human orthologs among these species, we identified 7 evolutionarily conserved signalling cascades, the insulin/TOR network, three MAPK (ERK, p38, JNK), JAK/STAT, TGF-β, and Nf-κB pathways that act pleiotropically on ageing and immunity. We review current evidence for these pathways linking immunity and lifespan, and their role in the detrimental dysregulation of the immune system with age, known as immunosenescence. We argue that the phenotypic effects of these pathways are often context-dependent and vary, for example, between tissues, sexes, and types of pathogenic infection. Future research therefore needs to explore a higher temporal, spatial and environmental resolution to fully comprehend the connection between ageing and immunity.
Collapse
Affiliation(s)
- Daniel K Fabian
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK. .,Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, London, UK.
| | - Matías Fuentealba
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK.,Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Handan Melike Dönertaş
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK
| | - Linda Partridge
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, London, UK.,Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Janet M Thornton
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK
| |
Collapse
|
8
|
Chauhan P, Dandapat J, Sarkar A, Saha B. March of Mycobacterium: miRNAs intercept host cell CD40 signalling. Clin Transl Immunology 2020; 9:e1179. [PMID: 33072321 PMCID: PMC7541823 DOI: 10.1002/cti2.1179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/22/2020] [Accepted: 08/22/2020] [Indexed: 12/12/2022] Open
Abstract
The disease tuberculosis is fatal if untreated. It is caused by the acid‐fast bacilli Mycobacterium tuberculosis. Mycobacterium resides and replicates within the alveolar macrophages, causing inflammation and granuloma, wherein macrophage‐T cell interactions enhance the inflammation‐causing pulmonary caseous lesions. The first interactions between Mycobacterium and the receptors on macrophages decide the fate of Mycobacterium because of phagolysosomal impairments and the expression of several miRNAs, which may regulate CD40 expression on macrophages. While the altered phagolysosomal functions impede antigen presentation to the T cell‐expressed antigen receptor, the interactions between the macrophage‐expressed CD40 and the T cell‐expressed CD40‐ligand (CD40L or CD154) provide signals to T cells and Mycobacterium‐infected macrophages. These two functions significantly influence the resolution or persistence of Mycobacterium infection. CD40 controls T‐cell polarisation and host‐protective immunity by eliciting interleukin‐12p40, nitric oxide, reactive oxygen species and IFN‐γ production. Indeed, CD40‐deficient mice succumb to low‐dose aerosol infection with Mycobacterium because of deficient interleukin (IL)‐12 production leading to impaired IFN‐γ‐secreting T‐cell response. In contrast, despite generating fewer granulomas, the CD40L‐deficient mice developed anti‐mycobacterial T‐cell responses to the levels observed in the wild‐type mice. These host‐protective responses are significantly subdued by the Mycobacterium‐infected macrophage produced TGF‐β and IL‐10, which promote pro‐mycobacterial T‐cell responses. The CD40‐CD40L‐induced counteractive immune responses against Mycobacterium thus present a conundrum that we explain here with a reconciliatory hypothesis. Experimental validation of the hypothesis will provide a rationale for designing anti‐tubercular immunotherapy.
Collapse
Affiliation(s)
| | | | - Arup Sarkar
- Trident Academy of Creative Technology Bhubaneswar India
| | - Bhaskar Saha
- National Centre for Cell Science (NCCS) Pune India.,Trident Academy of Creative Technology Bhubaneswar India
| |
Collapse
|
9
|
Wolk K, Join-Lambert O, Sabat R. Aetiology and pathogenesis of hidradenitis suppurativa. Br J Dermatol 2020; 183:999-1010. [PMID: 33048349 DOI: 10.1111/bjd.19556] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/06/2020] [Indexed: 02/06/2023]
Abstract
Hidradenitis suppurativa (HS) is a chronic inflammatory disorder. Patients develop inflamed nodules and abscesses and, at later stages of disease, epithelialized tunnels and scars in skinfolds of axillary, inguinal, gluteal and perianal areas. Quality of life is affected due to severe pain, purulent secretion, restricted mobility and systemic involvement. Genetics and lifestyle factors including smoking and obesity contribute to the development of HS. These factors lead to microbiome alteration, subclinical inflammation around the terminal hair follicles, and infundibular hyperkeratosis, resulting in plugging and rupture of the follicles. Cell-damage-associated molecules and propagating bacteria trigger inflammation and lead to massive immune cell infiltration that clinically manifests as inflamed nodules and abscesses. The immune system plays a key role also in the progression and chronification of skin alterations. Innate proinflammatory cytokines (e.g. interleukin-1β and tumour necrosis factor-α), mediators of activated T helper (Th)1 and Th17 cells (e.g. interleukin-17 and interferon-γ), and effector mechanisms of neutrophilic granulocytes, macrophages and plasma cells are involved. Simultaneously, skin lesions contain anti-inflammatory mediators (e.g. interleukin-10) and show limited activity of Th22 and regulatory T cells. The inflammatory vicious circle finally results in pain, purulence, tissue destruction and scarring. Chronic inflammation in patients with HS is also frequently detected in organs other than the skin, as indicated by their comorbidities. All these aspects represent a challenge for the development of therapeutic approaches, which are urgently needed for this debilitating disease. This scholarly review focuses on the causes and pathogenetic mechanisms of HS and the potential therapeutic value of this knowledge.
Collapse
Affiliation(s)
- K Wolk
- Berlin-Brandenburg Centre for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - O Join-Lambert
- Groupe de Recherche sur l'Adaptation Microbienne (GRAM 2.0, EA 2656), Normandie University, UNICAEN, UNIROUEN, Caen, France.,Department of Microbiology, CHU de Caen Normandie, Caen, France
| | - R Sabat
- Interdisciplinary Group of Molecular Immunopathology, Dermatology/Medical Immunology, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Psoriasis Research and Treatment Centre, Charité-Universitätsmedizin Berlin, Berlin, Germany
| |
Collapse
|
10
|
Mollaei M, Abbasi A, Hassan ZM, Pakravan N. The intrinsic and extrinsic elements regulating inflammation. Life Sci 2020; 260:118258. [PMID: 32818542 DOI: 10.1016/j.lfs.2020.118258] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 08/07/2020] [Accepted: 08/08/2020] [Indexed: 12/14/2022]
Abstract
Inflammation is a sophisticated biological tissue response to both extrinsic and intrinsic stimuli. Although the pathological aspects of inflammation are well appreciated, there are still rooms for understanding the physiological functions of the inflammation. Recent studies have focused on mechanisms, context and the role of physiological inflammation. Besides, there have been progress in the comprehension of commensal microbiota, immunometabolism, cancer and intracellular signaling events' roles that impact on the regulation of inflammation. Despite the fact that inflammatory responses are vital through tissue damage, understanding the mechanisms to turn off the finished or unnecessary inflammation is crucial for restoring homeostasis. Inflammation seems to be a smart process that acts like two edges of a sword, meaning that it has both protective and deleterious consequences. Knowing both edges and the regulation processes will help the future understanding and therapy for various diseases.
Collapse
Affiliation(s)
- M Mollaei
- Department of Immunology, School of Medicine, Tarbiat Modares University, Iran.
| | - A Abbasi
- Department of Immunology, School of Medicine, Tarbiat Modares University, Iran
| | - Z M Hassan
- Department of Immunology, School of Medicine, Tarbiat Modares University, Iran
| | - N Pakravan
- Department of Immunology, School of Medicine, Alborz University of Medical Science, Iran
| |
Collapse
|
11
|
Gharibi T, Babaloo Z, Hosseini A, Abdollahpour-alitappeh M, Hashemi V, Marofi F, Nejati K, Baradaran B. Targeting STAT3 in cancer and autoimmune diseases. Eur J Pharmacol 2020; 878:173107. [DOI: 10.1016/j.ejphar.2020.173107] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 04/05/2020] [Accepted: 04/06/2020] [Indexed: 02/08/2023]
|
12
|
Guo YL, Feng L, Jiang WD, Wu P, Liu Y, Kuang SY, Tang L, Tang WN, Zhou XQ. Dietary iron deficiency impaired intestinal immune function of on-growing grass carp under the infection of Aeromonas hydrophila: Regulation of NF-κB and TOR signaling. FISH & SHELLFISH IMMUNOLOGY 2019; 93:669-682. [PMID: 31408728 DOI: 10.1016/j.fsi.2019.08.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/06/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
Iron is an important mineral element for fish. In this study, we investigated the influences of dietary iron deficiency on intestinal immune function as well as underlying signaling of on-growing grass carp (Ctenopharyngodon idella). Fish were fed with six graded level of dietary iron for sixty days, and a fourteen days' challenge test under infection of Aeromonas hydrophila thereafter. Results showed that compared with optimal iron level, iron deficiency increased enteritis morbidity, decreased lysozyme (LZ) and acid phosphatase (ACP) activities, complement 3 (C3), C4 and immunoglobulin M (IgM) concentrations and down-regulated mRNA levels of hepcidin, liver expressed antimicrobial peptide 2A (LEAP-2A), LEAP-2B, Mucin2, β-defensin-1, anti-inflammatory cytokines transforming growth factor β1 (TGF-β1), TGF-β2, interleukin 4/13A (IL-4/13A), IL-4/13B, IL-10, IL-11 and IL-15, inhibitor of κBα (IκBα), target of rapamycin (TOR) and ribosomal protein S6 kinase 1 (S6K1), whereas up-regulated mRNA levels of pro-inflammatory cytokines IL-1β, interferon γ2 (IFN-γ2), IL-8, IL-12p35, IL-12p40 and IL-17D, nuclear factor kappa B (NF-κB) p65, IκB kinases α (IKKα), IKKβ and eIF4E-binding protein (4E-BP) in intestine of on-growing grass carp, indicating that iron deficiency impaired intestinal immune function of fish under infection of A. hydrophila. Besides, iron excess also increased enteritis morbidity and impaired immune function of fish under infection of A. hydrophila. In addition, the effect of ferrous fumarate on intestinal immune function of on-growing grass carp is more efficient than ferrous sulfate. Finally, based on ability against enteritis, LZ activities in mid intestine and distal intestine, we recommended adding 83.37, 86.71 and 85.39 mg iron/kg into diet, respectively.
Collapse
Affiliation(s)
- Yan-Lin Guo
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 6111.0930, China
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 6111.0930, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 6111.0930, China; Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 6111.0930, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 6111.0930, China; Key Laboratory of Animal Disease-resistant Nutrition, Ministry of Education, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 6111.0930, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 6111.0930, China; Key Laboratory of Animal Disease-resistant Nutrition, Ministry of Education, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 6111.0930, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 6111.0930, China; Key Laboratory of Animal Disease-resistant Nutrition and Feed, Ministry of Agriculture and Rural Affairs, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, 610066, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, 610066, China
| | - Wu-Neng Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, 610066, China
| | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 6111.0930, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 6111.0930, China; Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, China.
| |
Collapse
|
13
|
Bezzerri V, Cipolli M. Shwachman-Diamond Syndrome: Molecular Mechanisms and Current Perspectives. Mol Diagn Ther 2019; 23:281-290. [PMID: 30413969 DOI: 10.1007/s40291-018-0368-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Shwachman-Diamond syndrome (SDS) is a rare inherited disease mainly caused by mutations in the Shwachman-Bodian-Diamond Syndrome (SBDS) gene. However, it has recently been reported that other genes, including DnaJ heat shock protein family (Hsp40) member C21 (DNAJC21), elongation factor-like 1 (EFL1) and signal recognition particle 54 (SRP54) are also associated with an SDS-like phenotype. Interestingly, SBDS, DNAJC21, EFL1 and SRP54 are involved in ribosome biogenesis: SBDS, through direct interaction with EFL1, promotes the release of the eukaryotic initiation factor 6 (eIF6) during ribosome maturation, DNAJC21 stabilizes the 80S ribosome, and SRP54 facilitates protein trafficking. These findings strengthen the postulate that SDS is a ribosomopathy. SDS is a multiple-organ disease mainly characterized by bone marrow failure, bone malformations, pancreatic insufficiency and cognitive disorders. Almost 15-20% of patients with SDS present myelodysplastic syndrome with a high risk of acute myeloid leukemia (AML) transformation. Unfortunately, besides bone marrow transplantation, no gene-based therapy for SDS has yet been developed. This review aims to recapitulate the recent findings on the molecular mechanisms of SDS underlying bone marrow failure, hematopoiesis and AML development and to draw a realistic picture of current perspectives.
Collapse
Affiliation(s)
- Valentino Bezzerri
- Cystic Fibrosis Center, Azienda Ospedaliero Universitaria Ospedali Riuniti di Ancona, Via Conca 71, 60126, Torrette, Ancona, Italy
| | - Marco Cipolli
- Cystic Fibrosis Center, Azienda Ospedaliero Universitaria Ospedali Riuniti di Ancona, Via Conca 71, 60126, Torrette, Ancona, Italy.
| |
Collapse
|
14
|
Bastian D, Wu Y, Betts BC, Yu XZ. The IL-12 Cytokine and Receptor Family in Graft-vs.-Host Disease. Front Immunol 2019; 10:988. [PMID: 31139181 PMCID: PMC6518430 DOI: 10.3389/fimmu.2019.00988] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/16/2019] [Indexed: 12/11/2022] Open
Abstract
Allogeneic hematopoietic cell transplantation (allo-HCT) is performed with curative intent for high- risk blood cancers and bone marrow failure syndromes; yet the development of acute and chronic graft-vs.-host disease (GVHD) remain preeminent causes of death and morbidity. The IL-12 family of cytokines is comprised of IL-12, IL-23, IL-27, IL-35, and IL-39. This family of cytokines is biologically distinct in that they are composed of functional heterodimers, which bind to cognate heterodimeric receptor chains expressed on T cells. Of these, IL-12 and IL-23 share a common β cytokine subunit, p40, as well as a receptor chain: IL-12Rβ1. IL-12 and IL-23 have been documented as proinflammatory mediators of GVHD, responsible for T helper 1 (Th1) differentiation and T helper 17 (Th17) stabilization, respectively. The role of IL-27 is less defined, seemingly immune suppressive via IL-10 secretion by Type 1 regulatory (Tr1) cells yet promoting inflammation through impairing CD4+ T regulatory (Treg) development and/or enhancing Th1 differentiation. More recently, IL-35 was described as a potent anti-inflammatory agent produced by regulatory B and T cells. The role of the newest member, IL-39, has been implicated in proinflammatory B cell responses but has not been explored in the context of allo-HCT. This review is directed at discussing the current literature relevant to each IL-12-family cytokine and cognate receptor engagement, as well as the consequential downstream signaling implications, during GVHD pathogenesis. Additionally, we will provide an overview of translational strategies targeting the IL-12 family cytokines, their receptors, and subsequent signal transduction to control GVHD.
Collapse
Affiliation(s)
- David Bastian
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, United States
| | - Yongxia Wu
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, United States
| | - Brian C Betts
- Department of Medicine, University of Minnesota, Minneapolis, MN, United States
| | - Xue-Zhong Yu
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, United States.,Department of Medicine, Medical University of South Carolina, Charleston, SC, United States
| |
Collapse
|
15
|
Keser G, Aksu K, Direskeneli H. Discrepancies between vascular and systemic inflammation in large vessel vasculitis: an important problem revisited. Rheumatology (Oxford) 2018; 57:784-790. [PMID: 28968895 DOI: 10.1093/rheumatology/kex333] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Indexed: 11/13/2022] Open
Abstract
A lack of absolute correlation between systemic inflammation parameters and ongoing vascular disease activity is an important problem in some patients with large vessel vasculitis, especially Takayasu arteritis (TAK). Systemic and vascular wall inflammation in TAK are obviously interrelated, but sometimes they may act independently. There are clear discrepancies between these two types of inflammation, including cytokine patterns and responses to treatment. Vascular and systemic inflammation may also be discordant in two subgroups of giant cell arteritis. The first subgroup is mainly characterized by severe systemic inflammation mostly associated with IL-6-driven immunity, while in the second subgroup there is less systemic inflammation but prominent neuro-ophthalmic ischaemic complications characterized mostly by IFN-γ-mediated effects. Although no definite boundaries exist, it may be suggested that the IL-6/Th17/IL-17 pathway primarily drives systemic inflammation while the IL-12/Th1/IFN-γ pathway dominates in vascular wall inflammation both in TAK and giant cell arteritis. Immunosuppressive treatment of TAK (especially corticosteroids) initially suppresses systemic inflammation, while longer treatment duration is required for the suppression of vascular inflammation. Therefore, evaluating only the systemic inflammation may be misleading. Vascular wall inflammation is currently evaluated using expensive imaging methods, which are not feasible for repetitive use. Although pentraxin-3 is superior to erythrocyte sedimentation rate and CRP, we need more reliable biomarkers to reflect vascular wall inflammation in patients with TAK.
Collapse
Affiliation(s)
- Gokhan Keser
- Department of Internal Medicine, Division of Rheumatology, Ege University School of Medicine, Izmir, Turkey
| | - Kenan Aksu
- Department of Internal Medicine, Division of Rheumatology, Ege University School of Medicine, Izmir, Turkey
| | - Haner Direskeneli
- Department of Internal Medicine, Division of Rheumatology, Marmara University School of Medicine, Istanbul, Turkey
| |
Collapse
|
16
|
Guo YL, Wu P, Jiang WD, Liu Y, Kuang SY, Jiang J, Tang L, Tang WN, Zhang YA, Zhou XQ, Feng L. The impaired immune function and structural integrity by dietary iron deficiency or excess in gill of fish after infection with Flavobacterium columnare: Regulation of NF-κB, TOR, JNK, p38MAPK, Nrf2 and MLCK signalling. FISH & SHELLFISH IMMUNOLOGY 2018; 74:593-608. [PMID: 29367005 DOI: 10.1016/j.fsi.2018.01.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 10/26/2017] [Accepted: 01/16/2018] [Indexed: 06/07/2023]
Abstract
The aim of this study was to investigate the effects and potential mechanisms of dietary iron on immune function and structural integrity in gill of young grass carp (Ctenopharyngodon idella). A total of 630 grass carp (242.32 ± 0.58 g) were fed diets containing graded levels of iron at 12.15 (basal diet), 35.38, 63.47, 86.43, 111.09, 136.37 and 73.50 mg/kg for 60 days. Subsequently, a challenge test was conducted by infection with Flavobacterium columnare to investigate the effects of dietary iron on gill immune function and structural integrity in young grass carp. First, the results indicated that compared with the optimal iron level, iron deficiency decreased lysozyme (LZ) and acid phosphatase (ACP) activities, complement 3 (C3), C4 and immunoglobulin M (IgM) contents, and down-regulated the mRNA levels of antibacterial peptides, anti-inflammatory cytokines (except IL-4/13B), inhibitor of κBα (IκBα), target of rapamycin (TOR) and ribosomal protein S6 kinase 1 (S6K1). In contrast, iron deficiency up-regulated the mRNA levels of pro-inflammatory cytokines (except IL-6 and IFN-γ2), nuclear factor κB p65 (NF-κBp65), IκB kinases α (IKK), IKKβ, IKKγ, eIF4E-binding protein 1 (4E-BP1) and 4E-BP2 in gill of young grass carp, indicating that iron deficiency could impair immune function in fish gill. Second, iron deficiency down-regulated the mRNA levels of inhibitor of apoptosis protein (IAP) and myeloid cell leukemia 1 (Mcl-1), decreased activities and mRNA levels of antioxidant enzymes, down-regulated the mRNA levels of NF-E2-related factor 2 (Nrf2) and tight junction proteins (except claudin-12 and -15), and simultaneously increased malondialdehyde (MDA), protein carbonyl (PC) and reactive oxygen species (ROS) contents. Iron deficiency also up-regulated mRNA levels of cysteinyl aspartic acid-protease (caspase) -2, -7, -8, -9, Fas ligand (FasL), apoptotic protease activating factor-1 (Apaf-1), B-cell-lymphoma-2 associated X protein (Bax), p38 mitogen-activated protein kinase (p38MAPK), Kelch-like ECH-associating protein (Keap) 1a, Keap1b, claudin-12, -15 and MLCK, indicating that iron deficiency could disturb the structural integrity of gill in fish. Third, iron excess impaired immune function and structural integrity in gill of young grass carp. Forth, there was a better effect of ferrous fumarate than ferrous sulfate in young grass carp. Finally, the iron requirements based on ability against gill rot, ACP activity and MDA content in gill of young grass carp were estimated to be 76.52, 80.43 and 83.17 mg/kg, respectively.
Collapse
Affiliation(s)
- Yan-Lin Guo
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Jun Jiang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Wu-Neng Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China.
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China.
| |
Collapse
|
17
|
Zhao X, Zhang Z, Moreira D, Su YL, Won H, Adamus T, Dong Z, Liang Y, Yin HH, Swiderski P, Pillai RK, Kwak L, Forman S, Kortylewski M. B Cell Lymphoma Immunotherapy Using TLR9-Targeted Oligonucleotide STAT3 Inhibitors. Mol Ther 2018; 26:695-707. [PMID: 29433938 PMCID: PMC5910676 DOI: 10.1016/j.ymthe.2018.01.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 01/22/2023] Open
Abstract
Growing evidence links the aggressiveness of non-Hodgkin’s lymphoma, especially the activated B cell-like type diffuse large B cell lymphomas (ABC-DLBCLs) to Toll-like receptor 9 (TLR9)/MyD88 and STAT3 transcription factor signaling. Here, we describe a dual-function molecule consisting of a clinically relevant TLR9 agonist (CpG7909) and a STAT3 inhibitor in the form of a high-affinity decoy oligodeoxynucleotide (dODN). The CpG-STAT3dODN blocked STAT3 DNA binding and activity, thus reducing expression of downstream target genes, such as MYC and BCL2L1, in human and mouse lymphoma cells. We further demonstrated that injections (i.v.) of CpG-STAT3dODN inhibited growth of human OCI-Ly3 lymphoma in immunodeficient mice. Moreover, systemic CpG-STAT3dODN administration induced complete regression of the syngeneic A20 lymphoma, resulting in long-term survival of immunocompetent mice. Both TLR9 stimulation and concurrent STAT3 inhibition were critical for immune-mediated therapeutic effects, since neither CpG7909 alone nor CpG7909 co-injected with unconjugated STAT3dODN extended mouse survival. The CpG-STAT3dODN induced expression of genes critical to antigen-processing/presentation and Th1 cell activation while suppressing survival signaling. These effects resulted in the generation of lymphoma cell-specific CD8/CD4-dependent T cell immunity protecting mice from tumor rechallenge. Our results suggest that CpG-STAT3dODN as a systemic/local monotherapy or in combination with PD1 blockade can provide an opportunity for treating patients with B cell NHL.
Collapse
Affiliation(s)
- Xingli Zhao
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA; State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Tianjin 300020, China
| | - Zhuoran Zhang
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Dayson Moreira
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Yu-Lin Su
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Haejung Won
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Tomasz Adamus
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Zhenyuan Dong
- Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA; Toni Stephenson Lymphoma Center, Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Yong Liang
- DNA/RNA Synthesis Core Facility, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Hongwei H Yin
- Molecular Pathology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Piotr Swiderski
- DNA/RNA Synthesis Core Facility, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Raju K Pillai
- Molecular Pathology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Larry Kwak
- Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA; Toni Stephenson Lymphoma Center, Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Stephen Forman
- Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA; Toni Stephenson Lymphoma Center, Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Marcin Kortylewski
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA.
| |
Collapse
|
18
|
Tang S, Deng S, Guo J, Chen X, Zhang W, Cui Y, Luo Y, Yan Z, He QY, Shen S, Wang T. Deep Coverage Tissue and Cellular Proteomics Revealed IL-1β Can Independently Induce the Secretion of TNF-Associated Proteins from Human Synoviocytes. THE JOURNAL OF IMMUNOLOGY 2017; 200:821-833. [DOI: 10.4049/jimmunol.1700480] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 10/31/2017] [Indexed: 01/15/2023]
|
19
|
Guo YL, Jiang WD, Wu P, Liu Y, Zhou XQ, Kuang SY, Tang L, Tang WN, Zhang YA, Feng L. The decreased growth performance and impaired immune function and structural integrity by dietary iron deficiency or excess are associated with TOR, NF-κB, p38MAPK, Nrf2 and MLCK signaling in head kidney, spleen and skin of grass carp (Ctenopharyngodon idella). FISH & SHELLFISH IMMUNOLOGY 2017; 65:145-168. [PMID: 28428059 DOI: 10.1016/j.fsi.2017.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 04/06/2017] [Accepted: 04/13/2017] [Indexed: 06/07/2023]
Abstract
This study was conducted to investigate the effects of dietary iron on the growth, and immune function and structural integrity in head kidney, spleen and skin as well as the underlying signaling of young grass carp (Ctenopharyngodon idella). Total 630 grass carp (242.32 ± 0.58 g) were fed diets containing graded levels of iron at 12.15 (basal diet), 35.38, 63.47, 86.43, 111.09, 136.37 mg/kg (diets 2-6 were added with ferrous fumarate) and 73.50 mg/kg (diet 7 was added with ferrous sulfate) diet for 60 days. Then, a challenge test was conducted by infection of Aeromonas hydrophila for 14 days. The results firstly showed that compared with optimal iron level, iron deficiency decreased lysozyme (LZ) and acid phosphatase (ACP) activities, complement 3 (C3), C4 and immunoglobulin M (IgM) contents and down-regulated the mRNA levels of antibacterial peptides, anti-inflammatory cytokines, inhibitor of κBα (IκBα), target of rapamycin (TOR) and ribosomal protein S6 kinase 1 (S6K1), whereas up-regulated the mRNA levels of pro-inflammatory cytokines, nuclear factor kappa B (NF-κB) p65, IκB kinases β (IKKβ) and eIF4E-binding protein (4E-BP) in head kidney and spleen of young grass carp (P < 0.05), indicating that iron deficiency impaired immune function in head kidney and spleen of fish. Secondly, iron deficiency down-regulated the mRNA levels of B-cell lymphoma-2 (Bcl-2), myeloid cell leukemia 1 (Mcl-1), and inhibitor of apoptosis protein (IAP), and decreased activities and mRNA levels of antioxidant enzymes, down-regulated the mRNA levels of NF-E2-related factor 2 (Nrf2) and tight junction complexes, and up-regulated mRNA levels of cysteinyl aspartic acid-protease (caspase) -2, -3, -7, -8, -9, apoptotic protease activating factor-1 (Apaf-1), Bcl-2 associated X protein (Bax), Fas ligand (FasL), p38 mitogen-activated protein kinase (p38MAPK), Kelch-like ECH-associating protein (Keap) 1a, Keap1b, claudin-12 and myosin light chain kinase (MLCK), and increased malondialdehyde (MDA), protein carbonyl (PC) and reactive oxygen species (ROS) contents in head kidney and spleen of young grass carp (P < 0.05), indicating that iron deficiency impaired structural integrity in head kidney and spleen of fish. Thirdly, iron deficiency increased skin hemorrhage and lesion morbidity, and impaired immune function and structural integrity in skin of fish. Fourthly, iron excess decreased growth and impaired the immune function and structural integrity in head kidney, spleen and skin of fish. Besides, in young grass carp, based on PWG and ability against skin hemorrhage and lesion, the efficacy of ferrous fumarate relative to ferrous sulfate was 140.32% and 126.48%, respectively, and the iron requirements based on PWG, ability against skin hemorrhage and lesion, ACP activities and MDA contents in head kidney and spleen were estimated to be 75.65, 87.03, 79.74, 78.93, 83.17 and 82.14 mg/kg diet (based on ferrous fumarate), respectively.
Collapse
Affiliation(s)
- Yan-Lin Guo
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Wu-Neng Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China.
| |
Collapse
|
20
|
Yang SX, Wei WS, Ouyan QW, Jiang QH, Zou YF, Qu W, Tu JH, Zhou ZB, Ding HL, Xie CW, Lei QM, Zhong CR. Interleukin-12 activated CD8 + T cells induces apoptosis in breast cancer cells and reduces tumor growth. Biomed Pharmacother 2016; 84:1466-1471. [PMID: 27810342 DOI: 10.1016/j.biopha.2016.10.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 09/29/2016] [Accepted: 10/17/2016] [Indexed: 12/22/2022] Open
Abstract
During the past two decades, cytokines have emerged as key molecules to modulate innate and adaptive immunity and mediate anti-tumor activity. Although multiple cytokine types are implicated for such anti-tumor activity in several cancer types, it remains largely unknown in breast cancer. In this study, cytokines that are prior known for antitumor activity in different cancer types were examined against breast cancer using a 4T1 cells based xenograft-model. Our results showed Interleukin-12 (IL-12) (500ng/mouse) significantly suppressed the growth of tumors, while other cytokines showed minimal suppression. Subsequent molecular analysis by flow cytometry and immunohistochemistry confirmed the CD8+ cells infiltration and Interferon-γ (IFN-γ) production by them in tumor environment. In addition, we observed that IFN-γ production by activated CD8+ cells directly induced apoptosis in tumor cells, which together indicate that IL-12 causes CD8+ cells to infiltrate and secrete IFN-γ in tumor environment, which induce apoptosis in them and causes tumor growth suppression. Furthermore, we showed that lower dosage of IL-12 and chemotherapy drug tamoxifen combinations enhanced the tumor suppression as opposed to single treatments, and thereby propose an alternate option for high dosage associated effects for both drug and cytokine treatments.
Collapse
Affiliation(s)
- Shi-Xin Yang
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China.
| | - Wen-Song Wei
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Qian-Wen Ouyan
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Qi-Hua Jiang
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Yu-Feng Zou
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Wei Qu
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Jian-Hong Tu
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Zhi-Bing Zhou
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Hao-Long Ding
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Chun-Wei Xie
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Qiu-Mo Lei
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| | - Cheng-Ren Zhong
- Department of Galactophore, The Third Hospital of Nanchang, Breast Hospital of Jiangxi, 330009, China
| |
Collapse
|
21
|
Bezzerri V, Vella A, Calcaterra E, Finotti A, Gasparello J, Gambari R, Assael BM, Cipolli M, Sorio C. New insights into the Shwachman-Diamond Syndrome-related haematological disorder: hyper-activation of mTOR and STAT3 in leukocytes. Sci Rep 2016; 6:33165. [PMID: 27658964 PMCID: PMC5034238 DOI: 10.1038/srep33165] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 08/03/2016] [Indexed: 11/10/2022] Open
Abstract
Shwachman-Diamond syndrome (SDS) is an inherited disease caused by mutations of a gene encoding for SBDS protein. So far little is known about SBDS exact function. SDS patients present several hematological disorders, including neutropenia and myelodysplastic syndrome (MDS), with increased risk of leukemic evolution. So far, the molecular mechanisms that underlie neutropenia, MDS and AML in SDS patients have been poorly investigated. STAT3 is a key regulator of several cellular processes including survival, differentiation and malignant transformation. Moreover, STAT3 has been reported to regulate neutrophil granulogenesis and to induce several kinds of leukemia and lymphoma. STAT3 activation is known to be regulated by mTOR, which in turn plays an important role in cellular growth and tumorigenesis. Here we show for the first time, to the best of our knowledge, that both EBV-immortalized B cells and primary leukocytes obtained from SDS patients present a constitutive hyper-activation of mTOR and STAT3 pathways. Interestingly, loss of SBDS expression is associated with this process. Importantly, rapamycin, a well-known mTOR inhibitor, is able to reduce STAT3 phosphorylation to basal levels in our experimental model. A novel therapeutic hypothesis targeting mTOR/STAT3 should represent a significant step forward into the SDS clinical practice.
Collapse
Affiliation(s)
- Valentino Bezzerri
- Department of Medicine, Unit of General Pathology, University of Verona, Italy.,Regional Shwachman-Diamond Centre, Cystic Fibrosis Centre, Azienda Ospedaliera Universitaria Integrata di Verona, Italy
| | - Antonio Vella
- Unit of Immunology, Azienda Ospedaliera Universitaria Integrata di Verona, Italy
| | - Elisa Calcaterra
- Department of Medicine, Unit of General Pathology, University of Verona, Italy
| | - Alessia Finotti
- Department of Life Science and Biotechnology, University of Ferrara, Italy
| | - Jessica Gasparello
- Department of Life Science and Biotechnology, University of Ferrara, Italy
| | - Roberto Gambari
- Department of Life Science and Biotechnology, University of Ferrara, Italy
| | - Baroukh Maurice Assael
- Department of Pulmonology, Adult CF center, IRCCS Fondazione Cà granda Policlinico Milano, Italy
| | - Marco Cipolli
- Regional Shwachman-Diamond Centre, Cystic Fibrosis Centre, Azienda Ospedaliera Universitaria Integrata di Verona, Italy
| | - Claudio Sorio
- Department of Medicine, Unit of General Pathology, University of Verona, Italy
| |
Collapse
|
22
|
Gu J, Crosier PS, Hall CJ, Chen L, Xu X. Inflammatory pathway network-based drug repositioning and molecular phenomics. MOLECULAR BIOSYSTEMS 2016; 12:2777-84. [PMID: 27345454 DOI: 10.1039/c6mb00222f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Inflammation is a protective biological response to body/tissue damage that involves immune cells, blood vessels and molecular mediators. In this work, we constructed the pathway network of inflammation, including 11 sub-pathways of inflammatory factors. Pathway-based network efficiency and network flux were adopted to evaluate drug efficacy. By using approved and experimentally validated anti-inflammatory drugs as training sets, a predictive model was built to screen potential anti-inflammatory drugs from approved drugs in DrugBank. This drug repositioning approach would bring a fast and cheap way to find new indications for approved drugs. Moreover, molecular phenomics profiles of the expression of inflammatory factors will provide new insight into the drug mechanism of action.
Collapse
Affiliation(s)
- Jiangyong Gu
- Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Material Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Philip S Crosier
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland 1023, New Zealand.
| | - Christopher J Hall
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland 1023, New Zealand.
| | - Lirong Chen
- Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Material Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Xiaojie Xu
- Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Material Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| |
Collapse
|
23
|
Qiu H, Li Z, KuoLee R, Harris G, Gao X, Yan H, Xu HH, Chen W. Host resistance to intranasal Acinetobacter baumannii reinfection in mice. Pathog Dis 2016; 74:ftw048. [PMID: 27194730 DOI: 10.1093/femspd/ftw048] [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] [Accepted: 05/12/2016] [Indexed: 11/12/2022] Open
Abstract
Acinetobacter baumannii is a major causative agent of healthcare-associated infection and develops multidrug resistance rapidly. However, little is known in the host defense mechanisms against this infection. In this study, we examined if mice recovered from a previous intranasal A. baumannii infection (recovered mice) are fully protected against a subsequent reinfection. We found that, despite the presence of specific serum IgG and mucosal IgA responses prior to the reinfection, the recovered mice were only marginally better protected against intranasal challenge with low doses of homologous or heterologous A. baumannii strains than the naïve mice. Post-challenge immune and inflammatory (cells and cytokines) responses were generally comparable between recovered and naïve mice although the recovered mice produced significantly higher amounts of IFN-γ and IL-17 and had higher percentages and numbers of resident lung CD44(hi)CD62L(-)CD4(+) and CD19(+) B lymphocytes. Taken together, our results suggest that mice recovered from a previous A. baumannii infection remain susceptible to reinfection, indicating the complexity of immune protection mechanism for this Gram-negative, multidrug-resistant emerging pathogen.
Collapse
Affiliation(s)
- Hongyu Qiu
- Human Health Therapeutics, National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada
| | - Zack Li
- Human Health Therapeutics, National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada
| | - Rhonda KuoLee
- Human Health Therapeutics, National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada
| | - Greg Harris
- Human Health Therapeutics, National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada
| | - Xiaoling Gao
- Human Health Therapeutics, National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada
| | - Hongbin Yan
- Department of Chemistry, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - H Howard Xu
- Department of Biological Sciences, California State University, Los Angeles, CA 90032, USA
| | - Wangxue Chen
- Human Health Therapeutics, National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada Department of Biology, Brock University, St. Catharines, ON L2S 3A1, Canada
| |
Collapse
|
24
|
Srivastava IN, Shperdheja J, Baybis M, Ferguson T, Crino PB. mTOR pathway inhibition prevents neuroinflammation and neuronal death in a mouse model of cerebral palsy. Neurobiol Dis 2015; 85:144-154. [PMID: 26459113 DOI: 10.1016/j.nbd.2015.10.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 09/23/2015] [Accepted: 10/08/2015] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND AND PURPOSE Mammalian target of rapamycin (mTOR) pathway signaling governs cellular responses to hypoxia and inflammation including induction of autophagy and cell survival. Cerebral palsy (CP) is a neurodevelopmental disorder linked to hypoxic and inflammatory brain injury however, a role for mTOR modulation in CP has not been investigated. We hypothesized that mTOR pathway inhibition would diminish inflammation and prevent neuronal death in a mouse model of CP. METHODS Mouse pups (P6) were subjected to hypoxia-ischemia and lipopolysaccharide-induced inflammation (HIL), a model of CP causing neuronal injury within the hippocampus, periventricular white matter, and neocortex. mTOR pathway inhibition was achieved with rapamycin (an mTOR inhibitor; 5mg/kg) or PF-4708671 (an inhibitor of the downstream p70S6kinase, S6K, 75 mg/kg) immediately following HIL, and then for 3 subsequent days. Phospho-activation of the mTOR effectors p70S6kinase and ribosomal S6 protein and expression of hypoxia inducible factor 1 (HIF-1α) were assayed. Neuronal cell death was defined with Fluoro-Jade C (FJC) and autophagy was measured using Beclin-1 and LC3II expression. Iba-1 labeled, activated microglia were quantified. RESULTS Neuronal death, enhanced HIF-1α expression, and numerous Iba-1 labeled, activated microglia were evident at 24 and 48 h following HIL. Basal mTOR signaling, as evidenced by phosphorylated-S6 and -S6K levels, was unchanged by HIL. Rapamycin or PF-4,708,671 treatment significantly reduced mTOR signaling, neuronal death, HIF-1α expression, and microglial activation, coincident with enhanced expression of Beclin-1 and LC3II, markers of autophagy induction. CONCLUSIONS mTOR pathway inhibition prevented neuronal death and diminished neuroinflammation in this model of CP. Persistent mTOR signaling following HIL suggests a failure of autophagy induction, which may contribute to neuronal death in CP. These results suggest that mTOR signaling may be a novel therapeutic target to reduce neuronal cell death in CP.
Collapse
Affiliation(s)
- Isha N Srivastava
- Shriners Hospitals Pediatric Research Center, Temple University School of Medicine, Philadelphia, PA 19140, United States
| | - Jona Shperdheja
- Shriners Hospitals Pediatric Research Center, Temple University School of Medicine, Philadelphia, PA 19140, United States
| | - Marianna Baybis
- Shriners Hospitals Pediatric Research Center, Temple University School of Medicine, Philadelphia, PA 19140, United States
| | - Tanya Ferguson
- Shriners Hospitals Pediatric Research Center, Temple University School of Medicine, Philadelphia, PA 19140, United States
| | - Peter B Crino
- Shriners Hospitals Pediatric Research Center, Temple University School of Medicine, Philadelphia, PA 19140, United States.
| |
Collapse
|
25
|
Pedicord VA, Cross JR, Montalvo-Ortiz W, Miller ML, Allison JP. Friends not foes: CTLA-4 blockade and mTOR inhibition cooperate during CD8+ T cell priming to promote memory formation and metabolic readiness. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2015; 194:2089-98. [PMID: 25624453 DOI: 10.4049/jimmunol.1402390] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
During primary Ag encounter, T cells receive numerous positive and negative signals that control their proliferation, function, and differentiation, but how these signals are integrated to modulate T cell memory has not been fully characterized. In these studies, we demonstrate that combining seemingly opposite signals, CTLA-4 blockade and rapamycin-mediated mammalian target of rapamycin inhibition, during in vivo T cell priming leads to both an increase in the frequency of memory CD8(+) T cells and improved memory responses to tumors and bacterial challenges. This enhanced efficacy corresponds to increased early expansion and memory precursor differentiation of CD8(+) T cells and increased mitochondrial biogenesis and spare respiratory capacity in memory CD8(+) T cells in mice treated with anti-CTLA-4 and rapamycin during immunization. Collectively, these results reveal that mammalian target of rapamycin inhibition cooperates with rather than antagonizes blockade of CTLA-4, promoting unrestrained effector function and proliferation, and an optimal metabolic program for CD8(+) T cell memory.
Collapse
Affiliation(s)
- Virginia A Pedicord
- Department of Immunology, Howard Hughes Medical Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065;
| | - Justin R Cross
- Donald B. and Catherine C. Marron Cancer Metabolism Center, Memorial Sloan Kettering Cancer Center, New York, NY 10065; and
| | - Welby Montalvo-Ortiz
- Department of Immunology, Howard Hughes Medical Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Martin L Miller
- Computational Biology Center, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - James P Allison
- Department of Immunology, Howard Hughes Medical Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065;
| |
Collapse
|
26
|
Deficiency in either 4E-BP1 or 4E-BP2 augments innate antiviral immune responses. PLoS One 2014; 9:e114854. [PMID: 25531441 PMCID: PMC4273997 DOI: 10.1371/journal.pone.0114854] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 11/14/2014] [Indexed: 01/08/2023] Open
Abstract
Genetic deletion of both 4E-BP1 and 4E-BP2 was found to protect cells against viral infections. Here we demonstrate that the individual loss of either 4E-BP1 or 4E-BP2 in mouse embryonic fibroblasts (MEFs) is sufficient to confer viral resistance. shRNA-mediated silencing of 4E-BP1 or 4E-BP2 renders MEFs resistant to viruses, and compared to wild type cells, MEFs knockout for either 4E-BP1 or 4E-BP2 exhibit enhanced translation of Irf-7 and consequently increased innate immune response to viruses. Accordingly, the replication of vesicular stomatitis virus, encephalomyocarditis virus, influenza virus and Sindbis virus is markedly suppressed in these cells. Importantly, expression of either 4E-BP1 or 4E-BP2 in double knockout or respective single knockout cells diminishes their resistance to viral infection. Our data show that loss of 4E-BP1 or 4E-BP2 potentiates innate antiviral immunity. These results provide further evidence for translational control of innate immunity and support targeting translational effectors as an antiviral strategy.
Collapse
|
27
|
A systems model of phosphorylation for inflammatory signaling events. PLoS One 2014; 9:e110913. [PMID: 25333362 PMCID: PMC4205014 DOI: 10.1371/journal.pone.0110913] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 09/19/2014] [Indexed: 12/24/2022] Open
Abstract
Phosphorylation is a fundamental biochemical reaction that modulates protein activity in cells. While a single phosphorylation event is relatively easy to understand, multisite phosphorylation requires systems approaches for deeper elucidation of the underlying molecular mechanisms. In this paper we develop a mechanistic model for single- and multi-site phosphorylation. The proposed model is compared with previously reported studies. We compare the predictions of our model with experiments published in the literature in the context of inflammatory signaling events in order to provide a mechanistic description of the multisite phosphorylation-mediated regulation of Signal Transducer and Activator of Transcription 3 (STAT3) and Interferon Regulatory Factor 5 (IRF-5) proteins. The presented model makes crucial predictions for transcription factor phosphorylation events in the immune system. The model proposes potential mechanisms for T cell phenotype switching and production of cytokines. This study also provides a generic framework for the better understanding of a large number of multisite phosphorylation-regulated biochemical circuits.
Collapse
|
28
|
STAT3 Target Genes Relevant to Human Cancers. Cancers (Basel) 2014; 6:897-925. [PMID: 24743777 PMCID: PMC4074809 DOI: 10.3390/cancers6020897] [Citation(s) in RCA: 349] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 03/22/2014] [Accepted: 03/28/2014] [Indexed: 12/29/2022] Open
Abstract
Since its discovery, the STAT3 transcription factor has been extensively studied for its function as a transcriptional regulator and its role as a mediator of development, normal physiology, and pathology of many diseases, including cancers. These efforts have uncovered an array of genes that can be positively and negatively regulated by STAT3, alone and in cooperation with other transcription factors. Through regulating gene expression, STAT3 has been demonstrated to play a pivotal role in many cellular processes including oncogenesis, tumor growth and progression, and stemness. Interestingly, recent studies suggest that STAT3 may behave as a tumor suppressor by activating expression of genes known to inhibit tumorigenesis. Additional evidence suggested that STAT3 may elicit opposing effects depending on cellular context and tumor types. These mixed results signify the need for a deeper understanding of STAT3, including its upstream regulators, parallel transcription co-regulators, and downstream target genes. To help facilitate fulfilling this unmet need, this review will be primarily focused on STAT3 downstream target genes that have been validated to associate with tumorigenesis and/or malignant biology of human cancers.
Collapse
|
29
|
Xiao Z, Sun Z, Smyth K, Li L. Wnt signaling inhibits CTL memory programming. Mol Immunol 2013; 56:423-33. [PMID: 23911398 DOI: 10.1016/j.molimm.2013.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Revised: 06/07/2013] [Accepted: 06/15/2013] [Indexed: 12/31/2022]
Abstract
Induction of functional CTLs is one of the major goals for vaccine development and cancer therapy. Inflammatory cytokines are critical for memory CTL generation. Wnt signaling is important for CTL priming and memory formation, but its role in cytokine-driven memory CTL programming is unclear. We found that wnt signaling inhibited IL-12-driven CTL activation and memory programming. This impaired memory CTL programming was attributed to up-regulation of eomes and down-regulation of T-bet. Wnt signaling suppressed the mTOR pathway during CTL activation, which was different to its effects on other cell types. Interestingly, the impaired memory CTL programming by wnt was partially rescued by mTOR inhibitor rapamycin. In conclusion, we found that crosstalk between wnt and the IL-12 signaling inhibits T-bet and mTOR pathways and impairs memory programming which can be recovered in part by rapamycin. In addition, direct inhibition of wnt signaling during CTL activation does not affect CTL memory programming. Therefore, wnt signaling may serve as a new tool for CTL manipulation in autoimmune diseases and immune therapy for certain cancers.
Collapse
Affiliation(s)
- Zhengguo Xiao
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742 USA.
| | | | | | | |
Collapse
|
30
|
Neuropathic pain in animal models of nervous system autoimmune diseases. Mediators Inflamm 2013; 2013:298326. [PMID: 23737643 PMCID: PMC3662183 DOI: 10.1155/2013/298326] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 04/09/2013] [Indexed: 12/19/2022] Open
Abstract
Neuropathic pain is a frequent chronic presentation in autoimmune diseases of the nervous system, such as multiple sclerosis (MS) and Guillain-Barre syndrome (GBS), causing significant individual disablement and suffering. Animal models of experimental autoimmune encephalomyelitis (EAE) and experimental autoimmune neuritis (EAN) mimic many aspects of MS and GBS, respectively, and are well suited to study the pathophysiology of these autoimmune diseases. However, while much attention has been devoted to curative options, research into neuropathic pain mechanisms and relief has been somewhat lacking. Recent studies have demonstrated a variety of sensory abnormalities in different EAE and EAN models, which enable investigations of behavioural changes, underlying mechanisms, and potential pharmacotherapies for neuropathic pain associated with these diseases. This review examines the symptoms, mechanisms, and clinical therapeutic options in these conditions and highlights the value of EAE and EAN animal models for the study of neuropathic pain in MS and GBS.
Collapse
|
31
|
Wu X, Guo W, Wu L, Gu Y, Gu L, Xu S, Wu X, Shen Y, Ke Y, Tan R, Sun Y, Xu Q. Selective sequestration of STAT1 in the cytoplasm via phosphorylated SHP-2 ameliorates murine experimental colitis. THE JOURNAL OF IMMUNOLOGY 2012; 189:3497-507. [PMID: 22942432 DOI: 10.4049/jimmunol.1201006] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The side effects of current immunosuppressive drugs have impeded the development of therapies for immune diseases. Selective regulation of STAT signaling is an attractive strategy for treating immune disorders. In this study, we used a small-molecule compound to explore possible means of targeting STAT1 for the treatment of Th1-mediated inflammation. Selective regulation of STAT1 signaling in T cells from C57BL/6 mice was accomplished using fusaruside, a small-molecule compound that triggers the tyrosine phosphorylation of Src homology 2-containing protein tyrosine phosphatase 2 (SHP-2). The interaction of tyrosine phosphorylated SHP-2 (pY-SHP-2) with cytosolic STAT1 prevented the recruitment of STAT1 to IFN-γR and specifically inhibited STAT1 signaling, resulting in a reduction in Th1 cytokine production and an improvement in 2, 4, 6-trinitrobenzene sulfonic acid-induced colitis in mice. Blocking the pY-SHP-2-STAT1 interaction, with SHP-2 inhibitor NSC-87877 or using T cells from conditional SHP-2 knockout mice, reversed the effects of fusaruside, resulting in STAT1 activation and worsened colitis. The fusaruside-induced ability of pY-SHP-2 to selectively sequestrate STAT1 from recruitment to the receptor is independent of its function as a phosphatase, demonstrating a novel role for SHP-2 in regulating both STAT1 signaling and Th1-type immune responses. These findings could lead to increased options for the treatment of Crohn's disease and other Th1-mediated inflammatory diseases.
Collapse
Affiliation(s)
- Xingxin Wu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210093, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Li X, Garcia K, Sun Z, Xiao Z. Temporal regulation of rapamycin on memory CTL programming by IL-12. PLoS One 2011; 6:e25177. [PMID: 21966447 PMCID: PMC3179471 DOI: 10.1371/journal.pone.0025177] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Accepted: 08/26/2011] [Indexed: 12/16/2022] Open
Abstract
Mammalian target of rapamycin (mTOR) is a master regulator of cell growth. Recent reports have defined its important role in memory cytotoxic T lymphocyte (CTL) differentiation in infections and memory programming. We report that rapamycin regulated memory CTL programming by IL-12 to a similar level in a wide range of concentrations, and the enhanced memory CTLs by rapamycin were functional and provided similar protection against Listeria Monocytogenes challenge compared to the control. In addition, rapamycin-experienced CTLs went through substantially enhanced proliferation after transfer into recipients. Furthermore, the regulatory function of rapamycin on CD62L expression in memory CTLs was mainly contributed by the presence of rapamycin in the first 24-hr of stimulation in vitro, whereas the effective window of rapamycin on the size of memory CTLs was determined between 24 to 72 hrs. In conclusion, rapamycin regulates IL-12-driven programming of CTLs to a similar level in a wide range of concentrations, and regulates the phenotype and the size of memory CTLs in different temporal windows.
Collapse
Affiliation(s)
- Xiangdong Li
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, United States of America
| | - Karla Garcia
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, United States of America
| | - Zhifeng Sun
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, United States of America
| | - Zhengguo Xiao
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, United States of America
- * E-mail:
| |
Collapse
|
33
|
He G, Zhang X, Wu D, Sun A, Wang X. Relapse of aplastic anemia responsive to sirolimus combined with cyclosporine. Pediatr Blood Cancer 2011; 56:1133-5. [PMID: 21488160 DOI: 10.1002/pbc.22865] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Accepted: 09/13/2010] [Indexed: 12/25/2022]
Abstract
Aplastic anemia (AA) is an immune-mediated disease. Although most patients are responsive to immunosuppressive therapy (IST) with a combination of anti-thymocyte globulin (ATG) and cyclosporine (CsA), some patients relapse or are refractory to IST. Sirolimus (rapamysin) inhibits the serine-threonine kinase mammalian target of rapamysin (mTOR), and blocks CsA-resistant and calcium-independent pathways late in the progression of the T-cell cycle. We report two cases of AA which relapsed after CsA and ATG plus CsA, respectively. They achieved transfusion independence after retreatment with sirolimus in combination with a CsA.
Collapse
Affiliation(s)
- Guangsheng He
- Key Laboratory of Thrombosis and Hematostasis of Ministry of Health, Jiangsu Insititute of Hematology, Department of Hematology of First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, P.R. China.
| | | | | | | | | |
Collapse
|
34
|
Haidinger M, Poglitsch M, Geyeregger R, Kasturi S, Zeyda M, Zlabinger GJ, Pulendran B, Hörl WH, Säemann MD, Weichhart T. A versatile role of mammalian target of rapamycin in human dendritic cell function and differentiation. THE JOURNAL OF IMMUNOLOGY 2010; 185:3919-31. [PMID: 20805416 DOI: 10.4049/jimmunol.1000296] [Citation(s) in RCA: 172] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The mammalian target of rapamycin (mTOR) regulates cell growth and survival and exists as rapamycin-sensitive mTOR complex (mTORC) 1 and as rapamycin-insensitive mTORC2. Although mTOR is a well-known regulator of diverse immune cells, its detailed role in human dendritic cell (DC) function and differentiation is only incompletely understood. In this study, we demonstrate divergent roles of mTOR during activation and differentiation of myeloid DCs (mDCs) and monocyte-derived DCs (moDCs). Inhibition of mTORC1 in mDCs activated with TLR-dependent or -independent stimuli increased proinflammatory cytokines and NF-κB, whereas IL-10 and STAT3 were blocked. Rapamycin regulated the costimulatory/surface molecules CD86, programmed death ligand-1, and CD25 on mDCs and significantly increased the T cell allostimulatory potential of mDCs. In contrast, rapamycin suppressed immunostimulatory molecules and the allostimulatory potential of LPS-stimulated moDCs by an inability to augment NF-κB signaling. In differentiating moDCs, the PI3K/Akt-dependent mTOR pathway was constitutively activated by GM-CSF to induce DC differentiation in an mTORC1-dependent manner. Inhibition of mTORC1 or mTORC1/2 during moDC differentiation decreased moDC survival and markedly hampered its immunostimulatory phenotype. Analyzing the fate of DCs in vivo, we found that kidney transplant patients treated with rapamycin displayed an increased immunostimulatory potential of mDCs compared with patients treated with calcineurin inhibitors. Furthermore, rapamycin did not interfere with mDC differentiation in these patients. Collectively, mTOR exerts divergent immunoregulatory functions during DC activation and differentiation depending on the DC type that lead to opposing T cell responses, which might be of clinical importance in transplantation, cancer, and also for novel vaccination strategies.
Collapse
Affiliation(s)
- Michael Haidinger
- Clinical Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Bekisz J, Baron S, Balinsky C, Morrow A, Zoon KC. Antiproliferative Properties of Type I and Type II Interferon. Pharmaceuticals (Basel) 2010; 3:994-1015. [PMID: 20664817 PMCID: PMC2907165 DOI: 10.3390/ph3040994] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2010] [Revised: 03/15/2010] [Accepted: 03/29/2010] [Indexed: 01/22/2023] Open
Abstract
The clinical possibilities of interferon (IFN) became apparent with early studies demonstrating that it was capable of inhibiting tumor cells in culture and in vivo using animal models. IFN gained the distinction of being the first recombinant cytokine to be licensed in the USA for the treatment of a malignancy in 1986, with the approval of IFN-α2a (Hoffman-La Roche) and IFN-α2b (Schering-Plough) for the treatment of Hairy Cell Leukemia. In addition to this application, other approved antitumor applications for IFN-α2a are AIDS-related Kaposi's Sarcoma and Chronic Myelogenous Leukemia (CML) and other approved antitumor applications for IFN-α2b are Malignant Melanoma, Follicular Lymphoma, and AIDS-related Kapoisi's Sarcoma. In the ensuing years, a considerable number of studies have been conducted to establish the mechanisms of the induction and action of IFN's anti-tumor activity. These include identifying the role of Interferon Regulatory Factor 9 (IRF9) as a key factor in eliciting the antiproliferative effects of IFN-α as well as identifying genes induced by IFN that are involved in recognition of tumor cells. Recent studies also show that IFN-activated human monocytes can be used to achieve >95% eradication of select tumor cells. The signaling pathways by which IFN induces apoptosis can vary. IFN treatment induces the tumor suppressor gene p53, which plays a role in apoptosis for some tumors, but it is not essential for the apoptotic response. IFN-α also activates phosphatidylinositol 3-kinase (PI3K), which is associated with cell survival. Downstream of PI3K is the mammalian target of rapamycin (mTOR) which, in conjunction with PI3K, may act in signaling induced by growth factors after IFN treatment. This paper will explore the mechanisms by which IFN acts to elicit its antiproliferative effects and more closely examine the clinical applications for the anti-tumor potential of IFN.
Collapse
Affiliation(s)
- Joseph Bekisz
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | | | | | | | | |
Collapse
|
36
|
Ye L, Wang X, Metzger DS, Riedel E, Montaner LJ, Ho W. Upregulation of SOCS-3 and PIAS-3 impairs IL-12-mediated interferon-gamma response in CD56 T cells in HCV-infected heroin users. PLoS One 2010; 5:e9602. [PMID: 20231901 PMCID: PMC2834757 DOI: 10.1371/journal.pone.0009602] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Accepted: 02/16/2010] [Indexed: 12/23/2022] Open
Abstract
Background CD56+ T cells are abundant in liver and play an important role in host innate immunity against viral infections, including hepatitis C virus (HCV) infection, a common infection among heroin abusers. We thus investigated the in vivo impact of heroin use or heroin use plus HCV infection on the CD56+ T cell frequency and function. Methodology/Principal Findings A total of 37 heroin users with (17) or without (20) HCV infection and 17 healthy subjects were included in the study. Although there was no significant difference in CD56+ T cell frequency in PBMCs among three study groups, CD56+ T cells isolated from the heroin users had significantly lower levels of constitutive interferon-gamma (IFN-γ) expression than those from the normal subjects. In addition, when stimulated by interleukin (IL)-12, CD56+ natural T cells from HCV-infected heroin users produced significantly lower levels of IFN-γ than those from the normal subjects. This diminished ability to produce IFN-γ by CD56+ T cells was associated with the increased plasma HCV viral loads in the HCV-infected heroin users. Investigation of the mechanisms showed that although heroin use or heroin use plus HCV infection had little impact on the expression of the key positive regulators (IL-12 receptors, STAT-1, 3, 4, 5, JAK-2, and TYK-2) in IL-12 pathway, heroin use or heroin use plus HCV infection induced the expression of suppressor of cytokine signaling protein-3 (SOCS-3) and protein inhibitors of activated STAT-3 (PIAS-3), two key inhibitors of IL-12 pathway. Conclusion/Significance These findings provide compelling in vivo evidence that heroin use or heroin use plus HCV infection impairs CD56+ T cell-mediated innate immune function, which may account for HCV infection and persistence in liver.
Collapse
Affiliation(s)
- Li Ye
- Department of Pathology and Laboratory Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Xu Wang
- Department of Pathology and Laboratory Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - David S. Metzger
- Department of Psychiatry, The Center for Studies of Addiction, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Eric Riedel
- Department of Pediatrics, Joseph Stokes, Jr. Research Institute, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Luis J. Montaner
- The Wistar Institute, Philadelphia, Pennsylvania, United States of America
| | - Wenzhe Ho
- Department of Pathology and Laboratory Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania, United States of America
- * E-mail:
| |
Collapse
|
37
|
Säemann MD, Haidinger M, Hecking M, Hörl WH, Weichhart T. The multifunctional role of mTOR in innate immunity: implications for transplant immunity. Am J Transplant 2009; 9:2655-61. [PMID: 19788500 DOI: 10.1111/j.1600-6143.2009.02832.x] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The mammalian target of rapamycin (mTOR) is an evolutionary conserved serine-threonine kinase that senses various environmental stimuli in most cells primarily to control cell growth. Restriction of cellular proliferation by mTOR inhibition led to the use of mTOR inhibitors as immunosuppressants in allogeneic transplantation as well as novel anticancer agents. However, distinct inflammatory side effects such as fever, pneumonitis, glomerulonephritis or anemia of chronic disease have been observed under this treatment regime. Apart from the mere cell-cycle regulatory effect of mTOR in dividing cells, recent data revealed a master regulatory role of mTOR in the innate immune system. Hence, inhibition of mTOR promotes proinflammatory cytokines such as IL-12 and IL-1beta, inhibits the anti-inflammatory cytokine IL-10 and boosts MHC antigen presentation via autophagy in monocytes/macrophages and dendritic cells. Moreover, mTOR regulates type I interferon production and the expression of chemokine receptors and costimulatory molecules. These results place mTOR in a complex immunoregulatory context by controlling innate and adaptive immune responses. In this review, we discuss the clinical consequences of mTOR-inhibitor therapy and aim to integrate this recent data into our current view of the molecular mechanisms of clinically employed mTOR inhibitors and discuss their relevance with special emphasis to transplantation.
Collapse
Affiliation(s)
- M D Säemann
- Clinical Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University Vienna, Vienna, Austria.
| | | | | | | | | |
Collapse
|
38
|
Chatterjee S, Mookerjee A, Mookerjee Basu J, Chakraborty P, Ganguly A, Adhikary A, Mukhopadhyay D, Ganguli S, Banerjee R, Ashraf M, Biswas J, Das PK, Sa G, Chatterjee M, Das T, Choudhuri SK. A novel copper chelate modulates tumor associated macrophages to promote anti-tumor response of T cells. PLoS One 2009; 4:e7048. [PMID: 19756150 PMCID: PMC2737642 DOI: 10.1371/journal.pone.0007048] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Accepted: 08/18/2009] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND At the early stages of carcinogenesis, the induction of tumor specific T cell mediated immunity seems to block the tumor growth and give protective anti-tumor immune response. However, tumor associated macrophages (TAMs) might play an immunosuppressive role and subvert this anti tumor immunity leading to tumor progression and metastasis. METHODOLOGY/PRINCIPAL FINDINGS The Cu (II) complex, (chelate), copper N-(2-hydroxy acetophenone) glycinate (CuNG), synthesized by us, has previously been shown to have a potential usefulness in immunotherapy of multiple drug resistant cancers. The current study demonstrates that CuNG treatment of TAMs modulates their status from immunosuppressive to proimmunogenic nature. Interestingly, these activated TAMs produced high levels of IL-12 along with low levels of IL-10 that not only allowed strong Th1 response marked by generation of high levels of IFN-gamma but also reduced activation induced T cell death. Similarly, CuNG treatment of peripheral blood monocytes from chemotherapy and/or radiotherapy refractory cancer patients also modulated their cytokine status. Most intriguingly, CuNG treated TAMs could influence reprogramming of TGF-beta producing CD4(+)CD25(+) T cells toward IFN-gamma producing T cells. CONCLUSION/SIGNIFICANCE Our results show the potential usefulness of CuNG in immunotherapy of drug-resistant cancers through reprogramming of TAMs that in turn reprogram the T cells and reeducate the T helper function to elicit proper anti-tumorogenic Th1 response leading to effective reduction in tumor growth.
Collapse
Affiliation(s)
- Shilpak Chatterjee
- Department of In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, Kolkata, India
| | | | | | - Paramita Chakraborty
- Department of In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, Kolkata, India
| | - Avishek Ganguly
- Department of In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, Kolkata, India
| | - Arghya Adhikary
- Department of Molecular Medicine, Bose Institute, Kolkata, India
| | - Debanjan Mukhopadhyay
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Sudipta Ganguli
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Rajdeep Banerjee
- Rajendra Memorial Research Institute of Medical Sciences, Patna, India
| | - Mohammad Ashraf
- Department of Surgical Oncology, Hospital Unit, Chittaranjan National Cancer Institute, Kolkata, India
| | - Jaydip Biswas
- Department of Surgical Oncology, Hospital Unit, Chittaranjan National Cancer Institute, Kolkata, India
| | - Pradeep K. Das
- Rajendra Memorial Research Institute of Medical Sciences, Patna, India
| | - Gourisankar Sa
- Department of Molecular Medicine, Bose Institute, Kolkata, India
| | - Mitali Chatterjee
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Tanya Das
- Department of Molecular Medicine, Bose Institute, Kolkata, India
| | - Soumitra Kumar Choudhuri
- Department of In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, Kolkata, India
- * E-mail:
| |
Collapse
|
39
|
Kroczynska B, Kaur S, Platanias LC. Growth suppressive cytokines and the AKT/mTOR pathway. Cytokine 2009; 48:138-43. [PMID: 19682919 DOI: 10.1016/j.cyto.2009.07.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Accepted: 07/06/2009] [Indexed: 11/29/2022]
Abstract
The mTOR signaling pathway plays a very important role in the transmission of signals for initiation of mRNA translation and protein expression in mammalian cells. mTOR activates various downstream effectors to promote initiation of cap-dependent mRNA translation and mediate pro-mitogenic and pro-survival signals. Recent evidence has implicated effectors of this signaling cascade in mRNA translation for interferon stimulated genes (ISGs). In addition, it was recently shown that AKT/mTOR-mediated signals play important roles in the generation of IFN-dependent antiviral and growth inhibitory responses, suggesting that mTOR and its effectors can mediate diverse biological responses, depending on the cellular context and the triggering stimuli. In this review, the regulatory effects of various growth suppressive cytokines on the mTOR pathway are summarized and the emerging new functions of mTOR are discussed.
Collapse
Affiliation(s)
- Barbara Kroczynska
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Northwestern University Medical School, 303 East Superior Street, Lurie 3-107, Chicago, IL 60611, USA
| | | | | |
Collapse
|
40
|
ASB16165, a novel inhibitor for phosphodiesterase 7A (PDE7A), suppresses IL-12-induced IFN-gamma production by mouse activated T lymphocytes. Immunol Lett 2009; 122:193-7. [PMID: 19195485 DOI: 10.1016/j.imlet.2009.01.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2008] [Revised: 12/09/2008] [Accepted: 01/11/2009] [Indexed: 11/21/2022]
Abstract
Phosphodiesterase 7A (PDE7A) has been suggested to be involved in activation of T lymphocytes. In the present study, a possible involvement of PDE7A in function of preactivated T cells (i.e. T lymphoblasts) was investigated using ASB16165, an inhibitor for PDE7A. ASB16165, which has an IC50 value of 15 nM for human PDE7A, suppressed IL-12-induced IFN-gamma production by T lymphoblasts which have been prepared by stimulating mouse T cells with anti-CD3 antibody. In the same experiment, rolipram, a PDE4-specific inhibitor, showed similar effect, while calcineurin antagonist FK506 did not. Forskolin (an adenylyl cyclase activator) and dibutyryl cAMP also inhibited the IL-12-induced IFN-gamma synthesis. Rp-8-Br-cAMPS, an inhibitor of protein kinase A (PKA), reduced the suppressive effect of ASB16165 on the IFN-gamma production by T lymphoblasts. The rescue of IFN-gamma production by Rp-8-Br-cAMPS was also observed in the inhibition by rolipram and forskolin. These findings suggest that PDE7A may regulate function of activated T cells in a cAMP/PKA-dependent manner, and that PDE4 might share the role. The data in our study also indicate that PDE7 inhibitors such as ASB16165 will be beneficial for the patients with immunological disorders.
Collapse
|
41
|
Monti P, Scirpoli M, Maffi P, Ghidoli N, De Taddeo F, Bertuzzi F, Piemonti L, Falcone M, Secchi A, Bonifacio E. Islet transplantation in patients with autoimmune diabetes induces homeostatic cytokines that expand autoreactive memory T cells. J Clin Invest 2008; 118:1806-14. [PMID: 18431516 DOI: 10.1172/jci35197] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Accepted: 03/19/2008] [Indexed: 12/23/2022] Open
Abstract
Successful transplantation requires the prevention of allograft rejection and, in the case of transplantation to treat autoimmune disease, the suppression of autoimmune responses. The standard immunosuppressive treatment regimen given to patients with autoimmune type 1 diabetes who have received an islet transplant results in the loss of T cells. In many other situations, the immune system responds to T cell loss through cytokine-dependant homeostatic proliferation of any remaining T cells. Here we show that T cell loss after islet transplantation in patients with autoimmune type 1 diabetes was associated with both increased serum concentrations of IL-7 and IL-15 and in vivo proliferation of memory CD45RO(+) T cells, highly enriched in autoreactive glutamic acid decarboxylase 65-specific T cell clones. Immunosuppression with FK506 and rapamycin after transplantation resulted in a chronic homeostatic expansion of T cells, which acquired effector function after immunosuppression was removed. In contrast, the cytostatic drug mycophenolate mofetil efficiently blocked homeostatic T cell expansion. We propose that the increased production of cytokines that induce homeostatic expansion could contribute to recurrent autoimmunity in transplanted patients with autoimmune disease and that therapy that prevents the expansion of autoreactive T cells will improve the outcome of islet transplantation.
Collapse
Affiliation(s)
- Paolo Monti
- Immunology of Diabetes Unit and Clinical Transplant Unit, Telethon-Juvenile Diabetes Research Foundation Center for Beta Cell Replacement, San Raffaele Scientific Institute, Milan, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Abstract
Cardiac transplantation is the most effective treatment for advanced heart failure. Despite improvements in immunosuppression therapy that prevent acute rejection, cardiac allografts fail at rates of 3% to 5% per posttransplant year. The hallmark morphological lesion of chronically failing cardiac allografts, also seen in chronic renal and liver graft failure, is luminal stenosis of blood vessels, especially of conduit arteries. Late graft failure results from widespread secondary ischemic injury to the graft parenchyma rather than direct immune-mediated damage. Although this process affects the entire graft vasculature, graft arteriosclerosis is a suitable term to describe the problem because it applies to different types of failing organs and because it emphasizes the central feature, namely an accelerated form of arterial injury and remodeling. The precise pathogenesis of graft arteriosclerosis is unknown. In this review, we make the case that the signature T-helper type 1 cytokine, interferon (IFN)-γ, is a key effector in graft arteriosclerosis, which, together with the IFN-γ–inducing cytokine interleukin-12 and IFN-γ–inducible chemokines such as CXCR3 ligands, constitute a positive feedback loop for T-cell activation, differentiation, and recruitment that we refer to as the IFN-γ axis. We evaluate the evidence to support this hypothesis in clinical observational and experimental animal studies. Additionally, we examine the regulation of IFN-γ production within the artery wall, the effects of IFN-γ on vessel wall cells, and the outcome of therapeutic agents on IFN-γ production and signaling. These observations lead us to suggest that new therapies for graft arteriosclerosis should be optimized which focus on reducing IFN-γ synthesis or actions.
Collapse
Affiliation(s)
- George Tellides
- Interdepartmental Program in Vascular Biology and Transplantation, Department of Surgery, Yale University School of Medicine, New Haven, CT, USA.
| | | |
Collapse
|
43
|
Ranjbaran H, Sokol SI, Gallo A, Eid RE, Iakimov AO, D'Alessio A, Kapoor JR, Akhtar S, Howes CJ, Aslan M, Pfau S, Pober JS, Tellides G. An inflammatory pathway of IFN-gamma production in coronary atherosclerosis. THE JOURNAL OF IMMUNOLOGY 2007; 178:592-604. [PMID: 17182600 DOI: 10.4049/jimmunol.178.1.592] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Inflammation is associated with the pathogenesis of coronary atherosclerosis, although the mechanisms remain unclear. We investigated whether cytokine secretion by innate immune responses could contribute to the production of proarteriosclerotic Th1-type cytokines in human coronary atherosclerosis. Cytokines were measured by ELISA in the plasma of patients with coronary atherosclerosis undergoing cardiac catheterization. IL-18 was detected in all subjects, whereas a subset of patients demonstrated a coordinated induction of other IFN-gamma-related cytokines. Specifically, elevated plasma levels of IL-12 correlated with that of IFN-gamma and IFN-gamma-inducible chemokines, defining an IFN-gamma axis that was activated independently of IL-6 or C-reactive protein. Systemic inflammation triggered by cardiopulmonary bypass increased plasma levels of the IFN-gamma axis, but not that of IL-18. Activation of the IFN-gamma axis was not associated with acute coronary syndromes, but portended increased morbidity and mortality after 1-year follow-up. IL-12 and IL-18, but not other monokines, elicited secretion of IFN-gamma and IFN-gamma-inducible chemokines in human atherosclerotic coronary arteries maintained in organ culture. T cells were the principal source of IFN-gamma in response to IL-12/IL-18 within the arterial wall. This inflammatory response did not require, but was synergistic with and primed for TCR signals. IL-12/IL-18-stimulated T cells displayed a cytokine-producing, nonproliferating, and noncytolytic phenotype, consistent with previous descriptions of lymphocytes in stable plaques. In contrast to cognate stimuli, IL-12/IL-18-dependent IFN-gamma secretion was prevented by a p38 MAPK inhibitor and not by cyclosporine. In conclusion, circulating IL-12 may provide a mechanistic link between inflammation and Th1-type cytokine production in coronary atherosclerosis.
Collapse
Affiliation(s)
- Hooman Ranjbaran
- Department of Surgery, Yale University School of Medicine, New Haven, CT 06510, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Yang CS, Song CH, Lee JS, Jung SB, Oh JH, Park J, Kim HJ, Park JK, Paik TH, Jo EK. Intracellular network of phosphatidylinositol 3-kinase, mammalian target of the rapamycin/70 kDa ribosomal S6 kinase 1, and mitogen-activated protein kinases pathways for regulating mycobacteria-induced IL-23 expression in human macrophages. Cell Microbiol 2006; 8:1158-71. [PMID: 16819968 DOI: 10.1111/j.1462-5822.2006.00699.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We previously demonstrated that Mycobacterium tuberculosis (M. tbc)-induced interleukin (IL)-12 expression is negatively regulated by the phosphatidylinositol 3-kinase (PI3K) and extracellular signal-regulated kinase (ERK) 1/2 pathways in human monocyte-derived macrophages (MDMs). To extend these studies, we examined the nature of the involvement of toll-like receptors (TLRs) and intracellular signalling pathways downstream from PI3K in M. tbc-induced IL-23 expression in human MDMs. M. tbc-induced Akt activation and IL-23 expression were essentially dependent on TLR2. Blockade of the mammalian targets of rapamycin (mTOR)/70 kDa ribosomal S6 kinase 1 (S6K1) pathway by the specific inhibitor rapamycin greatly enhanced M. tbc-induced IL-12/IL-23 p40 (p40) and IL-23 p19 (p19) mRNA and IL-23 protein expression. In sharp contrast, p38 mitogen-activated protein kinase (MAPK) inhibition abrogated the p40 and p19 mRNA and IL-23 protein expression induced by M. tbc. Furthermore, the inhibition of PI3K-Akt, but not ERK 1/2 pathway, attenuated M. tbc-induced S6K1 phosphorylation, whereas PI3K inhibition enhanced p38 phosphorylation and apoptosis signal-regulating kinase 1 activity during exposure to M. tbc. Although the negative or positive regulation of IL-23 was not reversed by neutralization of IL-10, it was significantly modulated by blocking TLR2. Collectively, these findings provide new insight into the homeostatic mechanism controlling type 1 immune responses during mycobacterial infection involving the intracellular network of PI3K, S6K1, ERK 1/2 and p38 MAPK pathways in a TLR2-dependent manner.
Collapse
Affiliation(s)
- Chul-Su Yang
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Lin HJ, Hsieh FC, Song H, Lin J. Elevated phosphorylation and activation of PDK-1/AKT pathway in human breast cancer. Br J Cancer 2006; 93:1372-81. [PMID: 16288304 PMCID: PMC2361529 DOI: 10.1038/sj.bjc.6602862] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Activation of kinases signalling pathways contributes to various malignant phenotypes in human cancers, including breast tumour. To examine the possible activation of these signalling molecules, we examined the phosphorylation status in 12 protein kinases and transcription factors in normal primary human mammary epithelial cells, telomerase-immortalised human breast epithelial cell line, and two breast cancer lines, MDA-MB-468 and MCF-7, using Kinexus phosphorylated protein screening assays. The phosphorylation of FAK, mTOR, p70S6K, and PDK-1 were elevated in both breast cancer cell lines, whereas the phosphorylation of AKT, EGFR, ErbB2/Her2, PDGFR, Shc, and Stat3 were elevated in only one breast cancer line compared to normal primary mammary epithelial cells and telomerase-immortalised breast epithelial cells. The same findings were confirmed by Western blotting and by kinase assays. We further substantiated the phosphorylation status of these molecules in tissue microarray slides containing 89 invasive breast cancer tissues as well as six normal mammary tissues with immunohistochemistry staining using phospho-specific antibodies. Consistent findings were obtained as greater than 70% of invasive breast carcinomas expressed moderate to high levels of phosphorylated PDK-1, AKT, p70S6K, and EGFR. In sharp contrast, phosphorylation of the same proteins was nearly undetectable or was at low levels in normal mammary tissues under the same assay. Elevated phosphorylation of PDK-1, AKT, mTOR, p70S6K, S6, EGFR, and Stat3 were highly associated with invasive breast tumours (P<0.05). Taken together, our results suggest that activation of these kinase pathways by phosphorylation may in part account for molecular pathogenesis of human breast carcinoma. Particularly, moderate to high level of PDK-1 phosphorylation was found in 86% of high-grade metastasised breast tumours. This is the first report demonstrating phosphorylation of PDK-1 is frequently elevated in breast cancer with concomitantly increased phosphorylation of downstream kinases, including AKT, mTOR, p70S6K, S6, and Stat3. This finding thus suggested PDK-1 may promote oncogenesis in part through the activation of AKT and p70S6K and rationalised that PDK-1 as well as downstream components of PDK-1 signalling pathway may be promising therapeutic targets to treat breast cancer.
Collapse
Affiliation(s)
- H-J Lin
- Division of Medical Technology, School of Allied Medical Professions, College of Medicine and Public Health, The Ohio State University, Suite 535A, Atwell Hall, 453 West 10th Street, Columbus, OH 43210, USA.
| | | | | | | |
Collapse
|
46
|
Lin YY, Hung CF, Wu TC. Functional Studies of Lymphocytes Using RNAi Technology. Transfus Med Hemother 2006. [DOI: 10.1159/000090204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
|