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Li SY, Guo YL, Tian JW, Zhang HJ, Li RF, Gong P, Yu ZL. Anti-Tumor Strategies by Harnessing the Phagocytosis of Macrophages. Cancers (Basel) 2023; 15:2717. [PMID: 37345054 DOI: 10.3390/cancers15102717] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 06/23/2023] Open
Abstract
Macrophages are essential for the human body in both physiological and pathological conditions, engulfing undesirable substances and participating in several processes, such as organism growth, immune regulation, and maintenance of homeostasis. Macrophages play an important role in anti-bacterial and anti-tumoral responses. Aberrance in the phagocytosis of macrophages may lead to the development of several diseases, including tumors. Tumor cells can evade the phagocytosis of macrophages, and "educate" macrophages to become pro-tumoral, resulting in the reduced phagocytosis of macrophages. Hence, harnessing the phagocytosis of macrophages is an important approach to bolster the efficacy of anti-tumor treatment. In this review, we elucidated the underlying phagocytosis mechanisms, such as the equilibrium among phagocytic signals, receptors and their respective signaling pathways, macrophage activation, as well as mitochondrial fission. We also reviewed the recent progress in the area of application strategies on the basis of the phagocytosis mechanism, including strategies targeting the phagocytic signals, antibody-dependent cellular phagocytosis (ADCP), and macrophage activators. We also covered recent studies of Chimeric Antigen Receptor Macrophage (CAR-M)-based anti-tumor therapy. Furthermore, we summarized the shortcomings and future applications of each strategy and look into their prospects with the hope of providing future research directions for developing the application of macrophage phagocytosis-promoting therapy.
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Affiliation(s)
- Si-Yuan Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Yong-Lin Guo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Jia-Wen Tian
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - He-Jing Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Rui-Fang Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Ping Gong
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
- Department of Anesthesiology, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Zi-Li Yu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
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Lv H, Dong W, Guo K, Jin M, Li X, Li C, Zhang Y. Tumor Necrosis Factor Receptor-Associated Factor 5 Interacts with the NS3 Protein and Promotes Classical Swine Fever Virus Replication. Viruses 2018; 10:v10060305. [PMID: 29874812 PMCID: PMC6024839 DOI: 10.3390/v10060305] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 05/28/2018] [Accepted: 05/30/2018] [Indexed: 12/21/2022] Open
Abstract
Classical swine fever, caused by classical swine fever virus (CSFV), is a highly contagious and high-mortality viral disease, causing huge economic losses in the swine industry worldwide. CSFV non-structural protein 3 (NS3), a multifunctional protein, plays crucial roles in viral replication. However, how NS3 exactly exerts these functions is currently unknown. Here, we identified tumor necrosis factor receptor-associated factor 5 (TRAF5) as a novel binding partner of the NS3 protein via yeast two-hybrid, co-immunoprecipitation and glutathione S-transferase pull-down assays. Furthermore, we observed that TRAF5 promoted CSFV replication in porcine alveolar macrophages (PAMs). Additionally, CSFV infection or NS3 expression upregulated TRAF5 expression, implying that CSFV may exploit TRAF5 via NS3 for better growth. Moreover, CSFV infection and TRAF5 expression activated p38 mitogen activated protein kinase (MAPK) activity, and inhibition of p38 MAPK activation by the SB203580 inhibitor suppressed CSFV replication. Notably, TRAF5 overexpression did not promote CSFV replication following inhibition of p38 MAPK activation. Our findings reveal that TRAF5 promotes CSFV replication via p38 MAPK activation. This work provides a novel insight into the role of TRAF5 in CSFV replication capacity.
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Affiliation(s)
- Huifang Lv
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
- College of Pharmaceutical Engineering, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China.
| | - Wang Dong
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
- College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China.
| | - Kangkang Guo
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
| | - Mingxing Jin
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
| | - Xiaomeng Li
- Ningbo Entry-Exit Inspection and Quarantine Bureau, Ningbo 315000, China.
| | - Cunfa Li
- College of Pharmaceutical Engineering, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China.
| | - Yanming Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
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Yamanegi K, Yamada N, Nakasho K, Nishiura H. Participation of delta annexin A3 in the ribosomal protein S19 C-terminus-dependent inhibitory mechanism of the neutrophil C5a receptor through delta lactoferrin. Pathol Int 2017; 68:109-116. [PMID: 29288518 DOI: 10.1111/pin.12626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 11/28/2017] [Indexed: 01/14/2023]
Abstract
Although C5a receptor (C5aR) interacting with its agonist C5a promotes acute inflammation during the initiation phase, the roles of the recycling C5aR during the resolution phase are still unclear. We found that C5aR interacted with its antagonist/agonist ribosomal protein S19 (RP S19) polymer or a RP S19 polymer functional analogue S-tagged C5a/RP S19, which connects an RP S19 C-terminus (IAGQVAAANKKH) to the S-tagged C5a C-terminus, promoted acute inflammation at the resolution phase via an activation of the apoptosis-inducing transcription factor delta lactoferrin (δLf) in neutrophils and the membrane mobilizing factor full-length annexin A3 (ANXA3) in macrophages. To confirm the antagonistic system of the recycling C5aR, S-tagged δLf-coupled BrCN-activated Sepharose 4B beads were incubated with cytoplasmic proteins and identified a neutrophil-specific δANXA3 via pull-down experiments. The S-tagged C5a/RP S19-induced agonistic functions in macrophage-like cells that were differentiated from human promyelocytic leukemia HL-60 cells by phorbol-12-myristate-13-acetate were suppressed by δLf and δANXA3 co-overexpression. δANXA3 seems to participate in the antagonistic system of the neutrophil C5aR involving IAGQVAAANKKH and δLf. Most likely, δANXA3 works as antagonist for the recycling C5aR on neutrophils during the resolution phase of acute inflammation.
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Affiliation(s)
- Koji Yamanegi
- Department of Pathology, Hyogo College of Medicine, Nishinomiya, Japan
| | | | | | - Hiroshi Nishiura
- Department of Pathology, Hyogo College of Medicine, Nishinomiya, Japan
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Nishiura H, Kawakami T, Kawabe M, Kato-Kogoe N, Yamada N, Nakasho K, Yamanegi K. RP S19 C-terminal peptide trimer acts as a C5a receptor antagonist. Biochem Biophys Rep 2016; 7:70-76. [PMID: 28955891 PMCID: PMC5613253 DOI: 10.1016/j.bbrep.2016.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 04/30/2016] [Accepted: 05/09/2016] [Indexed: 11/25/2022] Open
Abstract
We have demonstrated that ribosomal protein S19 (RP S19) polymer, when crosslinked between Lys122 and Gln137 by activated coagulation factor XIII, acts as a C5a receptor (C5aR) antagonist/agonist. Based on experimental data obtained using RP S19 analog peptide and recombinant protein monomer, we suggested that L131DR, I134AGQVAAAN and K143KH moieties in the RP S19 C‐terminus act in, respectively, C5aR binding, penetration of the plasma membrane, and interaction with either an apoptosis-inducing molecule in neutrophils (delta lactoferrin) or a calcium channel-activating molecule (annexin A3) to induce the p38 MAPK pathway in macrophages. Recently, we observed RP S19 trimer in serum. To study the effects of this RP S19 trimer on C5aR, we prepared mutant RP S19 C‐terminal peptide (RP S19122-145) dimer and trimer, and examined their chemotactic activities and signal transduction pathways in human C5aR-overexpressing squamous cell carcinoma HSC-1 (HSC-1C5aR) cells using 24 trans-well chamber and western blotting assays, respectively. HSC-1C5aR cells were attracted by RP S19122-145 dimer and vice versa by RP S19122-145 trimer. The RP S19122-145 dimer-induced attraction was competitively blocked by pre-treatment with RP S19122-145 trimer. Moreover, RP S19122-145 trimer-induced p38 MAPK phosphorylation was stronger than RP S19122-145 dimer-induced p38 MAPK phosphorylation. RP S19122-145 trimer appeared to act as a C5aR antagonist. The agonistic and antagonistic effects of RP S19122-145 dimers and trimers were reflected by monocytic, THP-1-derived macrophage-like cells. Unlike the C5aR agonist C5a, which acts at the inflammation phase of acute inflammation, RP S19 trimer might act as a C5aR antagonist at the resolution phase. RP S19 dimer acted as C5aR antagonist/agonist. RP S19 dimer induced p38MAPK and ERK1/2 signal. RP S19 trimer acted as C5aR antagonist. RP S19 trimer induced p38MAPK signal.
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Affiliation(s)
- Hiroshi Nishiura
- Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Toru Kawakami
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Mutsuki Kawabe
- Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Nahoko Kato-Kogoe
- Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Naoko Yamada
- Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Keiji Nakasho
- Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Koji Yamanegi
- Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
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5
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The roles of ribosomal protein S19 C-terminus in a shortened neutrophil lifespan through delta lactoferrin. Immunobiology 2015; 220:1085-92. [DOI: 10.1016/j.imbio.2015.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 02/25/2015] [Accepted: 05/01/2015] [Indexed: 12/13/2022]
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Provost E, Bailey JM, Aldrugh S, Liu S, Iacobuzio-Donahue C, Leach SD. The tumor suppressor rpl36 restrains KRAS(G12V)-induced pancreatic cancer. Zebrafish 2015; 11:551-9. [PMID: 25380065 DOI: 10.1089/zeb.2014.1024] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Ribosomal proteins are known to be required for proper assembly of mature ribosomes. Recent studies indicate an additional role for ribosomal proteins as candidate tumor suppressor genes. Pancreatic acinar cells, recently identified as effective cells of origin for pancreatic adenocarcinoma, display especially high-level expression of multiple ribosomal proteins. We, therefore, functionally interrogated the ability of two ribosomal proteins, rpl36 and rpl23a, to alter the response to oncogenic Kras in pancreatic acinar cells using a newly established model of zebrafish pancreatic cancer. These studies reveal that rpl36, but not rpl23a, acts as a haploinsufficient tumor suppressor, as manifested by more rapid tumor progression and decreased survival in rpl36(hi1807/+);ptf1a:gal4VP16(Tg);UAS:GFP-KRAS(G12V) fish compared with their rpl36(+/+);ptf1a:gal4VP16;UAS:GFP-KRAS(G12V) siblings. These results suggest that rpl36 may function as an effective tumor suppressor during pancreatic tumorigenesis.
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Affiliation(s)
- Elayne Provost
- 1 Department of Surgery, Johns Hopkins University , Baltimore, Maryland
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Chen J, Fujino R, Zhao R, Semba U, Araki K, Yamamoto T. Role of blood ribosomal protein S19 in coagulum resorption: a study using Gln137Glu-ribosomal protein S19 gene knock-in mouse. Pathol Int 2014; 64:543-50. [PMID: 25329761 DOI: 10.1111/pin.12208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 09/02/2014] [Indexed: 11/27/2022]
Abstract
Sera of human, guinea pig or mouse contain a strong monocyte chemoattractant capacity that is attributed to the ribosomal protein S19 (RP S19) oligomers generated during blood coagulation. In contrast, sera prepared from Gln137Glu-RP S19 gene knock-in mice contained negligible chemoattractant capacity. When coagula that had been pre-formed from the blood of both the wild type and knock-in mice were intraperitoneally inserted into host mice, after 3 days of recovery, the knock-in mouse coagula remained larger than the wild type mouse coagula. The wild type mouse coagula were covered by multiple macrophage layers at the surface and were infiltrated inside by macrophages. Knock-in mouse coagula exhibited less macrophage involvement. When coagula of knock-in mice and coagula of knock-in mice containing C5a/RP S19, an artificial substitute of the RP S19 oligomers, were intraperitoneally inserted as pairs, the C5a/RP S19 containing coagulum was more rapidly absorbed, concomitant with increased macrophage involvement. Finally, when the knock-in mouse and wild type mouse coagula pairs were inserted into mice in which macrophages had been depleted using clodronate liposome, the size difference of recovered coagula was reversed. These results indicate the importance of the RP S19 oligomer-induced macrophage recruitment in coagulum resorption.
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Affiliation(s)
- Jun Chen
- Department of Molecular Pathology, Faculty of Life Science and Graduate School of Medical Sciences
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8
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Nishiura H, Yamanegi K, Kawabe M, Kato-Kogoe N, Yamada N, Nakasho K. Annexin A3 plays a role in cytoplasmic calcium oscillation by extracellular calcium in the human promyelocytic leukemia HL-60 cells differentiated by phorbol-12-myristate-13-acetate. Exp Mol Pathol 2014; 97:241-6. [PMID: 25036403 DOI: 10.1016/j.yexmp.2014.07.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 07/15/2014] [Indexed: 10/25/2022]
Abstract
The roles of annexin A3 (ANXA3) in macrophages are not fully understood. In contrast to C5a, we have demonstrated that C-terminal ribosomal protein S19 (RP S19)-tagged S-tagged C5a (S-tagged C5a/RP S19) raises an alternative cytoplasmic calcium oscillation by extracellular calcium during macrophage migration into apoptotic cells. We here differentiated human promyelocytic leukemia HL-60 cells bearing with either control sense RNA and shRNA for ANXA3 mRNA or a vector cDNA with or without ANXA3 cDNA into macrophage-like cells by phorbol-12-myristate-13-acetate and found that a fluorescence ratio (340 nm/380 nm) upon the S-tagged C5a/RP S19-induced alternative cytoplasmic calcium oscillation by extracellular calcium was an equilateral association with a dose of ANXA3. Moreover, the ANXA3-dependent modification was partially reflected upon the S-tagged C5a-induced classical cytoplasmic calcium oscillation by both intracellular calcium and extracellular calcium. ANXA3 seems to extend the C5aR-mediated cytoplasmic calcium oscillation by extracellular calcium at least in the HL-60 macrophage-like cells.
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Affiliation(s)
- Hiroshi Nishiura
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
| | - Koji Yamanegi
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Mutsuki Kawabe
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Nahoko Kato-Kogoe
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Naoko Yamada
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Keiji Nakasho
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
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Nishiura H, Zhao R, Chen J, Taniguchi K, Yamamoto T. Involvement of regional neutrophil apoptosis promotion by ribosomal protein S19 oligomers in resolution of experimental acute inflammation. Pathol Int 2014; 63:581-90. [DOI: 10.1111/pin.12115] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 10/31/2013] [Indexed: 12/13/2022]
Affiliation(s)
- Hiroshi Nishiura
- Department of Molecular Pathology; Faculty of Life Science; Kumamoto University; Kumamoto Japan
| | - Rui Zhao
- Department of Molecular Pathology; Faculty of Life Science; Kumamoto University; Kumamoto Japan
| | - Jun Chen
- Department of Molecular Pathology; Faculty of Life Science; Kumamoto University; Kumamoto Japan
| | - Keisuke Taniguchi
- Department of Molecular Pathology; Faculty of Life Science; Kumamoto University; Kumamoto Japan
| | - Tetsuro Yamamoto
- Department of Molecular Pathology; Faculty of Life Science; Kumamoto University; Kumamoto Japan
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Klos A, Wende E, Wareham KJ, Monk PN. International Union of Basic and Clinical Pharmacology. [corrected]. LXXXVII. Complement peptide C5a, C4a, and C3a receptors. Pharmacol Rev 2013; 65:500-43. [PMID: 23383423 DOI: 10.1124/pr.111.005223] [Citation(s) in RCA: 178] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The activation of the complement cascade, a cornerstone of the innate immune response, produces a number of small (74-77 amino acid) fragments, originally termed anaphylatoxins, that are potent chemoattractants and secretagogues that act on a wide variety of cell types. These fragments, C5a, C4a, and C3a, participate at all levels of the immune response and are also involved in other processes such as neural development and organ regeneration. Their primary function, however, is in inflammation, so they are important targets for the development of antiinflammatory therapies. Only three receptors for complement peptides have been found, but there are no satisfactory antagonists as yet, despite intensive investigation. In humans, there is a single receptor for C3a (C3a receptor), no known receptor for C4a, and two receptors for C5a (C5a₁ receptor and C5a₂ receptor). The most recently characterized receptor, the C5a₂ receptor (previously known as C5L2 or GPR77), has been regarded as a passive binding protein, but signaling activities are now ascribed to it, so we propose that it be formally identified as a receptor and be given a name to reflect this. Here, we describe the complex biology of the complement peptides, introduce a new suggested nomenclature, and review our current knowledge of receptor pharmacology.
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Affiliation(s)
- Andreas Klos
- Department for Medical Microbiology, Medical School Hannover, Hannover, Germany
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Provost E, Weier CA, Leach SD. Multiple ribosomal proteins are expressed at high levels in developing zebrafish endoderm and are required for normal exocrine pancreas development. Zebrafish 2013; 10:161-9. [PMID: 23697888 DOI: 10.1089/zeb.2013.0884] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Ribosomal protein L (rpl) genes are essential for assembly of the 60S subunit of the eukaryotic ribosome and may also carry out additional extra-ribosomal functions. We have identified a common expression pattern for rpl genes in developing zebrafish larvae. After initially widespread expression in early embryos, the expression of multiple rpl genes becomes increasingly restricted to the endoderm. With respect to the pancreas, rpl genes are highly expressed in ptf1a-expressing pancreatic progenitors at 48 hpf, suggesting possible functional roles in pancreatic morphogenesis and/or differentiation. Utilizing two available mutant lines, rpl23a(hi2582) and rpl6(hi3655b), we found that ptf1a-expressing pancreatic progenitors fail to properly expand in embryos homozygous for either of these genes. In addition to these durable homozygous phenotypes, we also demonstrated recoverable delays in ptf1a-expressing pancreatic progenitor expansion in rpl23a(hi2582) and rpl6(hi3655b) heterozygotes. Disruptions in ribosome assembly are generally understood to initiate a p53-dependent cellular stress response. However, concomitant p53 knockdown was unable to rescue normal pancreatic progenitor expansion in either rpl23a(hi2582) or rpl6(hi3655b) mutant embryos, suggesting required and p53-independent roles for rpl23a and rpl6 in pancreas development.
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Affiliation(s)
- Elayne Provost
- Department of Surgery, Johns Hopkins University , Baltimore, MD 21205, USA
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Dual functions of the C5a receptor as a connector for the K562 erythroblast-like cell-THP-1 macrophage-like cell island and as a sensor for the differentiation of the K562 erythroblast-like cell during haemin-induced erythropoiesis. Clin Dev Immunol 2012; 2012:187080. [PMID: 23346183 PMCID: PMC3546471 DOI: 10.1155/2012/187080] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 10/18/2012] [Accepted: 11/11/2012] [Indexed: 12/22/2022]
Abstract
The transcriptional nuclear factor binding to the Y box of human leukocyte antigen genes (NF-Y) for the C5a receptor (C5aR) gene is active in erythroblasts. However, the roles of the C5aR in erythropoiesis are unclear. We have previously demonstrated that apoptotic cell-derived ribosomal protein S19 (RP S19) oligomers exhibit extraribosomal functions in promoting monocyte chemotaxis and proapoptosis via the C5aR without receptor internalisation. In contrast to the extraribosomal functions of the RP S19, a proapoptotic signal in pro-EBs, which is caused by mutations in the RP S19 gene, is associated with the inherited erythroblastopenia, Diamond-Blackfan anaemia. In this study, we detected C5aR expression and RP S19 oligomer generation in human erythroleukemia K562 cells during haemin-induced erythropoiesis. Under monocell culture conditions, the differentiation into K562 erythrocyte-like cells was enhanced following the overexpression of Wild-type RP S19. Conversely, the differentiation was repressed following the overexpression of mutant RP S19. An RP S19 oligomer inhibitor and a C5aR inhibitor blocked the association of the K562 basophilic EB-like cells and the THP-1 macrophage-like cells under coculture conditions. When bound to RP S19 oligomers, the C5aR may exhibit dual functions as a connector for the EB-macrophage island and as a sensor for EB differentiation in the bone marrow.
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Miyazawa K. A negative regulator or just an unconcerned passerby: phosphoinositide 3-kinase signalling in IL-12 production. J Biochem 2012; 152:497-9. [DOI: 10.1093/jb/mvs122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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