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Jang YS, Park SH, Kang SG, Lee JS, Ko HJ, Kim PH. Combined Treatment With TGF-β1, Retinoic Acid, and Lactoferrin Robustly Generate Inducible Tregs (iTregs) Against High Affinity Ligand. Immune Netw 2023; 23:e37. [PMID: 37970231 PMCID: PMC10643331 DOI: 10.4110/in.2023.23.e37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 08/25/2023] [Accepted: 09/06/2023] [Indexed: 11/17/2023] Open
Abstract
Forkhead box P3-positive (Foxp3+)-inducible Tregs (iTregs) are readily generated by TGF-β1 at low TCR signaling intensity. TGF-β1-mediated Foxp3 expression is further enhanced by retinoic acid (RA) and lactoferrin (LF). However, the intensity of TCR signaling required for induction of Foxp3 expression by TGF-β1 in combination with RA and LF is unknown. Here, we found that either RA or LF alone decreased TGF-β1-mediated Foxp3 expression at low TCR signaling intensity. In contrast, at high TCR signaling intensity, the addition of either RA or LF strongly increased TGF-β1-mediated Foxp3 expression. Moreover, decreased CD28 stimulation was more favorable for TGF-β1/LF-mediated Foxp3 expression. Lastly, we found that at high signaling intensities of both TCR and CD28, combined treatment with TGF-β1, RA, and LF induced robust expression of Foxp3, in parallel with powerful suppressive activity against responder T cell proliferation. Our findings that TGFβ/RA/LF strongly generate high affinity Ag-specific iTreg population would be useful for the control of unwanted hypersensitive immune reactions such as various autoimmune diseases.
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Affiliation(s)
- Young-Saeng Jang
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea
| | - Sun-Hee Park
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea
| | - Seung-Goo Kang
- Division of Biomedical Convergence, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea
| | - Jung-Shin Lee
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea
| | - Hyun-Jeong Ko
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Korea
| | - Pyeung-Hyeun Kim
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea
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Jang YS, Yang SW, Kim TG, Song HE, Park S, Lee EH, Kang SG, Yoon SI, Ko HJ, Lee GS, Park SR, Seo SR, Kim PH. Lactoferrin-derived chimeric peptide (LFch) strongly boosts TGFβ1-mediated inducible Treg differentiation possibly through downregulating TCR/CD28 signalling. Immunol Suppl 2023; 168:110-119. [PMID: 36054548 DOI: 10.1111/imm.13566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 05/03/2022] [Indexed: 12/27/2022]
Abstract
We recently reported that lactoferrin (LF) induces Foxp3+ Treg differentiation through binding to TGFβ receptor III (TβRIII), and this activity was further enhanced by TGFβ1. Generally, a low T-cell receptor (TCR) signal strength is favourable for Foxp3+ Treg differentiation. In the present study, we explored the effect of lactoferrin chimera (LFch, containing lactoferricin [aa 17-30] and lactoferrampin [aa 265-284]), along with TGFβ1 on Foxp3+ Treg differentiation. LFch alone did not induce Foxp3 expression, yet LFch dramatically enhanced TGFβ1-induced Foxp3 expression. LFch had little effect on the phosphorylation of Smad3, a canonical transcriptional factor of TGFβ1. Instead, LFch attenuated the phosphorylation of S6 (a target of mTOR), IκB and PI3K. These activities of LFch were completely abrogated by pretreatment of LFch with soluble TGFβ1 receptor III (sTβRIII). Consistent with this, the activity of LFch on TGFβ1-induced Foxp3 expression was also abrogated by treatment with sTβRIII. Finally, the TGFβ1/LFch-induced T cell population substantially suppressed the proliferation of responder CD4+ T cells. These results indicate that LFch robustly enhances TGFβ1-induced Foxp3+ Treg differentiation by diminishing TCR/CD28 signal intensity.
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Affiliation(s)
- Young-Saeng Jang
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea.,Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Republic of Korea
| | - Seok-Won Yang
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Tae-Gyu Kim
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Ha-Eon Song
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Sunhee Park
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Eun Hye Lee
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Seung-Goo Kang
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Hyun-Jeong Ko
- College of Pharmacy, Kangwon National University, Chuncheon, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Republic of Korea
| | - Seok-Rae Park
- Department of Microbiology, Konyang University College of Medicine, Daejeon, Republic of Korea
| | - Su Ryeon Seo
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea.,Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Republic of Korea
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Jang YS, Yang SW, Park S, Kim YR, Han JH, Kim PH. Lactoferrin-derived Chimeric Peptide (LFch) boosts TGFβ1-induced Treg Differentiation by diminishing of TCR Signal intensity via TβRIII. The Journal of Immunology 2022. [DOI: 10.4049/jimmunol.208.supp.54.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Regulatory T cells (Tregs) are a special subset of T cells to suppress excessive immune response and maintain immunologic tolerance. It is known that lesser TCR signal strength is favorable for Foxp3+ Treg differentiation. We recently reported that LF substantially promoted Foxp3 expression by activated CD4+ T cells and this activity was further enhanced by TGF-β1. In the present study, we explored the effect of lactoferrin chimera (LFch, synthetic LF-derived chimeric peptides) along with TGFβ1 on Foxp3+ Treg differentiation. LFch itself did not induce Foxp3 expression. However, LFch dramatically enhanced TGFβ1-induced Foxp3 expression. LFch little affected the phosphorylation of Smad3, which is a canonical TGF-β1 mediator. Instead, LFch decreased the phosphorylation of S6, IkB, and PI3 kinase (an activation hallmark of TCR signaling). These effects of LFch were completely abolished by pretreatment of LFch with soluble TβRIII. Consistently, the enhancement of TGFβ1-induced Foxp3 by LFch was also abrogated by treatment of soluble TβRIII. Finally, TGFβ1/LFch-induced T cell population substantially suppressed the proliferation of responder CD4+ T cells. These results indicate that LFch potently enhances TGFβ1-induced Foxp3+ Treg differentiation by diminishing TCR signal intensity through TβRIII.
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Affiliation(s)
- Young-Saeng Jang
- 1Department of Molecular Bioscience, College of Biomedical Science, Kangwon Natl. Univ., South Korea
| | - Seok-Won Yang
- 1Department of Molecular Bioscience, College of Biomedical Science, Kangwon Natl. Univ., South Korea
| | - Sunhee Park
- 1Department of Molecular Bioscience, College of Biomedical Science, Kangwon Natl. Univ., South Korea
| | - Yu-Rim Kim
- 1Department of Molecular Bioscience, College of Biomedical Science, Kangwon Natl. Univ., South Korea
| | - Joo-Hee Han
- 1Department of Molecular Bioscience, College of Biomedical Science, Kangwon Natl. Univ., South Korea
| | - Pyeung-Hyeun Kim
- 1Department of Molecular Bioscience, College of Biomedical Science, Kangwon Natl. Univ., South Korea
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Jang YS, Song HE, Seo GY, Jo HJ, Park S, Park HW, Kim TG, Kang SG, Yoon SI, Ko HJ, Lee GS, Park SR, Kim PH. Lactoferrin Potentiates Inducible Regulatory T Cell Differentiation through TGF-β Receptor III Binding and Activation of Membrane-Bound TGF-β. J Immunol 2021; 207:2456-2464. [PMID: 34615735 DOI: 10.4049/jimmunol.2100326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 09/03/2021] [Indexed: 11/19/2022]
Abstract
Lactoferrin (LF) is known to possess anti-inflammatory activity, although its mechanisms of action are not well-understood. The present study asked whether LF affects the commitment of inducible regulatory T cells (Tregs). LF substantially promoted Foxp3 expression by mouse activated CD4+T cells, and this activity was further enhanced by TGF-β1. Interestingly, blocking TGF-β with anti-TGF-β Ab completely abolished LF-induced Foxp3 expression. However, no significant amount of soluble TGF-β was released by LF-stimulated T cells, suggesting that membrane TGF-β (mTGF-β) is associated. Subsequently, it was found that LF binds to TGF-β receptor III, which induces reactive oxygen species production and diminishes the expression of mTGF-β-bound latency-associated peptide, leading to the activation of mTGF-β. It was followed by phosphorylation of Smad3 and enhanced Foxp3 expression. These results suggest that LF induces Foxp3+ Tregs through TGF-β receptor III/reactive oxygen species-mediated mTGF-β activation, triggering canonical Smad3-dependent signaling. Finally, we found that the suppressive activity of LF-induced Tregs is facilitated mainly by CD39/CD73-induced adenosine generation and that this suppressor activity alleviates inflammatory bowel disease.
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Affiliation(s)
- Young-Saeng Jang
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea;
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Republic of Korea
| | - Ha-Eon Song
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Goo-Young Seo
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Hyeon-Ju Jo
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Sunhee Park
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Hui-Won Park
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Tae-Gyu Kim
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Seung-Goo Kang
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Hyun-Jeong Ko
- College of Pharmacy, Kangwon National University, Chuncheon, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Republic of Korea; and
| | - Seok-Rae Park
- Department of Microbiology, College of Medicine, Konyang University, Daejeon, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea;
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Republic of Korea
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Lee J, Park H, Lim J, Jin HS, Park Y, Jung YJ, Ko HJ, Yoon SI, Lee GS, Kim PH, Choi SS, Xiao C, Kang SG. GSK3 Restrains Germinal Center B Cells to Form Plasma Cells. J Immunol 2020; 206:481-493. [PMID: 33380497 DOI: 10.4049/jimmunol.2000908] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 11/13/2020] [Indexed: 02/04/2023]
Abstract
B cells in the germinal center (GC) are programmed to form plasma cells (PCs) or memory B cells according to signals received by receptors that are translated to carry out appropriate activities of transcription factors. However, the precise mechanism underlying this process to complete the GC reaction is unclear. In this study, we show that both genetic ablation and pharmacological inhibition of glycogen synthase kinase 3 (GSK3) in GC B cells of mice facilitate the cell fate decision toward PC formation, accompanied by acquisition of dark zone B cell properties. Mechanistically, under stimulation with CD40L and IL-21, GSK3 inactivation synergistically induced the transcription factors Foxo1 and c-Myc, leading to increased levels of key transcription factors required for PC differentiation, including IRF4. This GSK3-mediated alteration of transcriptional factors in turn facilitated the dark zone transition and consequent PC fate commitment. Our study thus reveals the upstream master regulator responsible for interpreting external cues in GC B cells to form PCs mediated by key transcription factors.
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Affiliation(s)
- Jeonghyun Lee
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyosung Park
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jiwon Lim
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyung-Seung Jin
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - Yoon Park
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Yu-Jin Jung
- Department of Biological Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyun-Jeong Ko
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea.,Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Geun-Shik Lee
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea.,College of Veterinary Medicine, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Pyeung-Hyeun Kim
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea.,Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sun Shim Choi
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea.,Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Changchun Xiao
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037; and.,State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China
| | - Seung Goo Kang
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea; .,Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
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Alhazemi AA, Park S, Shin JH, Cho YC, Kim Y, Lee J, Kim PH, Kim JW, Chu HH. Safety and efficacy of transarterial embolisation for treatment of dorsal pancreatic artery haemorrhage. Clin Radiol 2020; 76:314.e9-314.e15. [PMID: 33334554 DOI: 10.1016/j.crad.2020.11.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 11/12/2020] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the safety and efficacy of transarterial embolisation (TAE) of dorsal pancreatic artery (DPA) haemorrhage. MATERIALS AND METHODS Nineteen consecutive patients (M:F = 16:3, mean age 59.6 years) who underwent TAE of DPA in three tertiary medical centres between January 2001 to January 2020 were reviewed retrospectively. Angiographic features and the technical and clinical outcomes of TAE were analysed. RESULTS The clinical presentations were a bloody drain from the Jackson-Pratt drainage tube (n=8), melaena (n=7), abdominal pain (n=4), and haematochezia (n=3). Angiographic findings included pseudoaneurysm (n=14), contrast media extravasation (n=4), or abrupt cut-off of the arterial branch (n=1). The NBCA (N-butyl-cyanoacrylate; n=4), microcoils (n=4), and a combination of these agents (n=7) were used as embolic agents. The most common origin of the DPA in the present study cohort was the splenic artery (n=7), followed by the coeliac trunk (n=4), common hepatic artery (n=4), and superior mesenteric artery (n=4). Technical and clinical success rates were 100% and 84.2% (16/19), respectively. Of the three clinically unsuccessful cases, two patients were revealed to have newly developed bleeding from another artery. The other patient expired 1 day after the TAE procedure due to a progression of hepatic failure. In one patient, an asymptomatic non-target embolisation occurred in the right posterior tibial artery as a procedure-related complication. No major complications were observed. CONCLUSION TAE is safe and effective for the management of bleeding from the DPA. It is important to be aware of the DPA as a potential bleeding source, including the relevant clinical characteristics.
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Affiliation(s)
- A A Alhazemi
- Department of Radiology, King Fahd Central Hospital, Jazan 45196, Saudi Arabia
| | - S Park
- Department of Radiology, Gil Medical Centre, Gachon University College of Medicine, Incheon, Republic of Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - Y C Cho
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y Kim
- Department of Radiology Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - J Lee
- Department of Radiology Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - P H Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J W Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H H Chu
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Park HW, Park SH, Jo HJ, Kim TG, Lee JH, Kang SG, Jang YS, Kim PH. Lactoferrin Induces Tolerogenic Bone Marrow-Derived Dendritic Cells. Immune Netw 2020; 20:e38. [PMID: 33163246 PMCID: PMC7609161 DOI: 10.4110/in.2020.20.e38] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/08/2020] [Accepted: 07/13/2020] [Indexed: 12/03/2022] Open
Abstract
Dendritic cells (DCs) are professional antigen-presenting cells (APCs) that initiate both T-cell responses and tolerance. Tolerogenic DCs (tDCs) are regulatory DCs that suppress immune responses through the induction of T-cell anergy and Tregs. Because lactoferrin (LF) was demonstrated to induce functional Tregs and has a protective effect against inflammatory bowel disease, we explored the tolerogenic effects of LF on mouse bone marrow-derived DCs (BMDCs). The expression of CD80/86 and MHC class II was diminished in LF-treated BMDCs (LF-BMDCs). LF facilitated BMDCs to suppress proliferation and elevate Foxp3+ induced Treg (iTreg) differentiation in ovalbumin-specific CD4+ T-cell culture. Foxp3 expression was further increased by blockade of the B7 molecule using CTLA4-Ig but was diminished by additional CD28 stimulation using anti-CD28 Ab. On the other hand, the levels of arginase-1 and indoleamine 2,3-dioxygenase-1 (known as key T-cell suppressive molecules) were increased in LF-BMDCs. Consistently, the suppressive activity of LF-BMDCs was partially restored by inhibitors of these molecules. Collectively, these results suggest that LF effectively causes DCs to be tolerogenic by both the suppression of T-cell proliferation and enhancement of iTreg differentiation. This tolerogenic effect of LF is due to the reduction of costimulatory molecules and enhancement of suppressive molecules.
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Affiliation(s)
- Hui-Won Park
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Sun-Hee Park
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Hyeon-Ju Jo
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Tae-Gyu Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Jeong Hyun Lee
- Department of Systems Immunology, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Seung-Goo Kang
- Department of Systems Immunology, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Young-Saeng Jang
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Korea.,Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Pyeung-Hyeun Kim
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Korea.,Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
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Shook AJ, Vadakkumbatt V, Senarath Yapa P, Doolin C, Boyack R, Kim PH, Popowich GG, Souris F, Christani H, Maciejko J, Davis JP. Shook et al. Reply. Phys Rev Lett 2020; 125:059602. [PMID: 32794878 DOI: 10.1103/physrevlett.125.059602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 07/10/2020] [Indexed: 06/11/2023]
Affiliation(s)
- A J Shook
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - V Vadakkumbatt
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - P Senarath Yapa
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - C Doolin
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - R Boyack
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
- Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - P H Kim
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - G G Popowich
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - F Souris
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - H Christani
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - J Maciejko
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
- Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - J P Davis
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
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9
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Varga E, Vadakkumbatt V, Shook AJ, Kim PH, Davis JP. Observation of Bistable Turbulence in Quasi-Two-Dimensional Superflow. Phys Rev Lett 2020; 125:025301. [PMID: 32701340 DOI: 10.1103/physrevlett.125.025301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/15/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Turbulent flow restricted to two dimensions can spontaneously develop order on large scales, defying entropy expectations and in sharp contrast with turbulence in three dimensions where nonlinear turbulent processes act to destroy large-scale order. In this work we report the observation of unusual turbulent behavior in steady-state flow of superfluid ^{4}He-a liquid with vanishing viscosity and discrete vorticity-in a nearly two-dimensional channel. Surprisingly, for a range of experimental parameters, turbulence is observed to exist in two bistable states. This bistability can be well explained by the appearance of large-scale regions of flow of opposite vorticity.
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Affiliation(s)
- E Varga
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - V Vadakkumbatt
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - A J Shook
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - P H Kim
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - J P Davis
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
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10
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Jo HJ, Park SH, Jang YS, Park HW, Kim TG, Kim PH. Lactoferrin and TGF-β1 synergize to enhance differentiation of OVA-specific Foxp3+ iTregs. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.230.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
We recently found that lactoferrin (LF), like TGF-β1, enhanced Ag non-specific Foxp3+ iTreg differentiation and the two molecules synergized to express Foxp3. In the present study, we investigated effect of LF and TGF-β1 on Ag-specific Foxp3+ iTreg differentiation. Naïve CD4+ T cells isolated from OT-II mice were co-cultured with OVA323–339-loaded T cell-depleted splenocytes as APCs. OVA-specific Foxp3+ Treg population was increased by LF and TGF-β1 alone, and synergistically increased by combination of the two molecules. However, these increases were diminished by additional CD28 stimulation using anti-CD28 Ab. In parallel, blockade of B7 molecules using CTLA4-Ig markedly increased the Foxp3 expression. These results imply that lactoferrin alone or particularly along with TGF-β1 can cause naïve T cells to differentiate into Foxp3+ Tregs, greater under weak co-stimulatory signals.
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Affiliation(s)
- Hyeon-Ju Jo
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Sun-Hee Park
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Young-Saeng Jang
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Hui-Won Park
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Tae-Gyu Kim
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Pyeung-Hyeun Kim
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
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11
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Jang YS, Park HW, Park SH, Jo HJ, Kim TG, Kim PH. Lactoferrin modulates BMDCs to be tolerogenic leading to enhancement of Foxp3+iTreg differentiation as well as suppression of T cell proliferation. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.230.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
DCs are professional APCs for initiating both immune response and immune tolerance. Tolerogenic DCs are generally known as regulatory DCs that suppress immune responses through regulation of T cells such as induction of T cell anergy/apoptosis and Treg. Since we have demonstrated that lactoferrin (LF) induces functional Tregs and has a protective effect against IBD, we explored the tolerogenic effect of LF on mouse bone marrow-derived DC (BMDC) and its underlying mechanisms. LF enabled BMDCs to suppress the proliferation of allogenic CD4+ T cells, and elevated levels of Arg-1, IDO-1, and CD39/73 (known as key T cell suppressor molecules). Consistently, the suppressive activity of LF-treated DCs (LF-DCs) was disappeared by inhibitors of Arg-1 and CD39. Finally, LF-DCs enhanced TGFβ1-induced OVA-specific Foxp3+ T cell population.
Collectively, these results suggest that lactoferrin effectively causes DCs to be tolerogenic by both direct suppression of T cell proliferation and indirect enhancement of Treg differentiation.
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Affiliation(s)
- Young-Saeng Jang
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Hui-Won Park
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Sun-Hee Park
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Hyeon-Ju Jo
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Tae-Gyu Kim
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Pyeung-Hyeun Kim
- 1Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, 24341, South Korea
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12
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Shook AJ, Vadakkumbatt V, Senarath Yapa P, Doolin C, Boyack R, Kim PH, Popowich GG, Souris F, Christani H, Maciejko J, Davis JP. Stabilized Pair Density Wave via Nanoscale Confinement of Superfluid ^{3}He. Phys Rev Lett 2020; 124:015301. [PMID: 31976679 DOI: 10.1103/physrevlett.124.015301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Indexed: 06/10/2023]
Abstract
Superfluid ^{3}He under nanoscale confinement has generated significant interest due to the rich spectrum of phases with complex order parameters that may be stabilized. Experiments have uncovered a variety of interesting phenomena, but a complete picture of superfluid ^{3}He under confinement has remained elusive. Here, we present phase diagrams of superfluid ^{3}He under varying degrees of uniaxial confinement, over a wide range of pressures, which elucidate the progressive stability of both the A phase, as well as a growing region of stable pair density wave state.
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Affiliation(s)
- A J Shook
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - V Vadakkumbatt
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - P Senarath Yapa
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - C Doolin
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - R Boyack
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
- Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - P H Kim
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - G G Popowich
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - F Souris
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - H Christani
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - J Maciejko
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
- Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - J P Davis
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
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13
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Ahn JH, Cho J, Kwon BE, Lee GS, Yoon SI, Kang SG, Kim PH, Kweon MN, Yang H, Vallance BA, Kim YI, Chang SY, Ko HJ. IκBζ facilitates protective immunity against Salmonella infection via Th1 differentiation and IgG production. Sci Rep 2019; 9:8397. [PMID: 31182790 PMCID: PMC6557891 DOI: 10.1038/s41598-019-44019-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 04/23/2019] [Indexed: 01/12/2023] Open
Abstract
Inhibitor of kappa B (IκB)-ζ transcription is rapidly induced by stimulation with TLR ligands and IL-1. Despite high IκBζ expression in inflammation sites, the association of IκBζ with host defence via systemic immune responses against bacterial infection remains unclear. Oral immunisation with a recombinant attenuated Salmonella vaccine (RASV) strain did not protect IκBζ-deficient mice against a lethal Salmonella challenge. IκBζ-deficient mice failed to produce Salmonella LPS-specific IgG, especially IgG2a, although inflammatory cytokine production and immune cell infiltration into the liver increased after oral RASV administration. Moreover, IκBζ-deficient mice exhibited enhanced splenic germinal centre reactions followed by increased total IgG production, despite IκBζ-deficient B cells having an intrinsic antibody class switching defect. IκBζ-deficient CD4+ T cells poorly differentiated into Th1 cells. IFN-γ production by CD4+ T cells from IκBζ-deficient mice immunised with RASV significantly decreased after restimulation with heat-killed RASV in vitro, suggesting that IκBζ-deficient mice failed to mount protective immune responses against Salmonella infection because of insufficient Th1 and IgG production. Therefore, IκBζ is crucial in protecting against Salmonella infection by inducing Th1 differentiation followed by IgG production.
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Affiliation(s)
- Jae-Hee Ahn
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Jaewon Cho
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Bo-Eun Kwon
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Seung Goo Kang
- Division of Biomedical Convergence, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Mi-Na Kweon
- Mucosal Immunology Laboratory, Department of Convergence Medicine, University of Ulsan College of Medicine/Asan Medical Center, Seoul, Republic of Korea
| | - Hyungjun Yang
- Department of Pediatrics, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bruce A Vallance
- Department of Pediatrics, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Young-In Kim
- Laboratory of Microbiology, College of Pharmacy, Ajou University, Suwon, 16499, Republic of Korea
| | - Sun-Young Chang
- Laboratory of Microbiology, College of Pharmacy, Ajou University, Suwon, 16499, Republic of Korea.
| | - Hyun-Jeong Ko
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea.
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14
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Seo GY, Shui JW, Mikulski Z, Wang Q, Takahashi D, Giles DA, Iwaya H, Sethi A, Kim PH, Cheroutre H, Kronenberg M. CD160-HVEM signaling in intestinal epithelial cells modulates gut microbial homeostasis. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.191.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Intestinal epithelial cells (IEC) are a first barrier that segregates host and commensal bacteria to maintain intestinal homeostasis. Intestinal intraepithelial lymphocytes (IEL) are located beneath or between adjacent IEC and directly contact IEC. The herpes virus entry mediator (HVEM), a member of the tumor necrosis factor receptor superfamily (TNFRSF), is highly expressed by IEC. Epithelial HVEM expression was previously reported as a regulator of innate immune defense during acute infections in the intestine (Shui et al., Nature, 2012). Here, we identify that HVEM signaling in IEC is important for the regulation of the gut microbiota at steady state. Mice with an epithelial-specific deletion of the gene encoding HVEM (HvemΔIEC) had significantly increased segmented filamentous bacteria (SFB) which caused an increase in Th17 cells in the ileum. Treatment with the antibiotic vancomycin eliminated SFB and decreased Th17 cells in HvemΔIEC mice. Additionally, mice with a deletion of the gene encoding CD160, which is a ligand for HVEM and is highly expressed by IEL, including intraepithelial innate lymphoid cells (ILC) and intraepithelial T cells, had increased SFB in the ileum. Our findings suggest that the interaction of CD160 expressed by IEL with HVEM expressed by IEC is important at steady state for shaping the microbiota in the intestine.
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Affiliation(s)
| | - Jr-Wen Shui
- 1La Jolla Institute for Immunology
- 2Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | | | - Qingyang Wang
- 1La Jolla Institute for Immunology
- 3Institute of Basic Medical Sciences, China
| | - Daisuke Takahashi
- 1La Jolla Institute for Immunology
- 4Keio University Faculty of Pharmacy, Japan
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15
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Kim SM, Jang YS, Kim PH. Distinct Roles of TβRIII and LRP-1 in Lactoferrin-mediated Foxp3+ Inducible Tregs. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.67.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
We recently found that lactoferrin (LF) stimulated mouse naïve CD4+T cells to differentiate into inducible Foxp3+Tregs (iTregs). However, LF decreased cell proliferation, CD62L shedding, and CD44 expression. In the present study, we characterized these phenomena at the receptor level. Addition of excess amount of soluble TβRIII (betaglycan) virtually abrogated the LF-induced Foxp3 expression but little affected LF-suppressed cell proliferation/CD62L shedding/CD44 expression. On the other hand, treatment of anti-LRP-1 Ab slightly enhanced LF-induced Foxp3 expression while substantially restored LF-suppressed cell proliferation/CD62L shedding/CD44 expression. These results indicate that LF enhances Foxp3 expression mainly through TβRIII and simultaneously suppresses cell proliferation/CD62L shedding/CD44 expression mainly through LRP-1. Thus, it is assumed that LF renders activated CD4+T cells to become central memory-like Tregs (CD4+Foxp3+CD62L+CD44lo).
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16
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Ahn H, Kim J, Kang SG, Yoon SI, Ko HJ, Kim PH, Hong EJ, An BS, Lee E, Lee GS. Mercury and arsenic attenuate canonical and non-canonical NLRP3 inflammasome activation. Sci Rep 2018; 8:13659. [PMID: 30209319 PMCID: PMC6135747 DOI: 10.1038/s41598-018-31717-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 08/22/2018] [Indexed: 11/09/2022] Open
Abstract
Exposure to heavy metals can cause several diseases associated with the immune system. Although the effects of heavy metals on production of inflammatory cytokines have been previously studied, the role of heavy metals in inflammasome activation remains poorly studied. The inflammasome is an intracellular multi-protein complex that detects intracellular danger signals, resulting in inflammatory responses such as cytokine maturation and pyroptosis. In this study, we elucidated the effects of four heavy metals, including cadmium (Cd), mercury (Hg), arsenic (As), and lead (Pb), on the activation of NLRP3, NLRC4, and AIM2 inflammasomes. In our results, mercury and arsenic inhibited interleukin (IL)-1β and IL-18 secretion resulting from canonical and non-canonical NLRP3 inflammasome activation in macrophages and attenuated elevation of serum IL-1β in response to LPS treatment in mice. In the mechanical studies, mercury interrupted production of mitochondrial reactive oxygen species, release of mitochondrial DNA, and activity of recombinant caspase-1, whereas arsenic down-regulated expression of promyelocytic leukemia protein. Both mercury and arsenic inhibited Asc pyroptosome formation and gasdermin D cleavage. Thus, we suggest that exposure to mercury and/or arsenic could disrupt inflammasome-mediated inflammatory responses, which might cause unexpected side effects.
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Affiliation(s)
- Huijeong Ahn
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Jeongeun Kim
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Seung Goo Kang
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Hyun-Jeong Ko
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Eui-Ju Hong
- College of Veterinary Medicine and Institute of Veterinary Science, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Beum-Soo An
- Department of Biomaterial Science, College of Natural Resources and Life Science, Pusan National University, Gyeongsangnam-do, 50612, Republic of Korea
| | - Eunsong Lee
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea.
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17
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Han HJ, Jang YS, Seo GY, Park SG, Kang SG, Yoon SI, Ko HJ, Lee GS, Kim PH. Murine γδ T Cells Render B Cells Refractory to Commitment of IgA Isotype Switching. Immune Netw 2018; 18:e25. [PMID: 30181913 PMCID: PMC6117511 DOI: 10.4110/in.2018.18.e25] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/12/2018] [Accepted: 07/25/2018] [Indexed: 12/17/2022] Open
Abstract
γδ T cells are abundant in the gut mucosa and play an important role in adaptive immunity as well as innate immunity. Although γδ T cells are supposed to be associated with the enhancement of Ab production, the status of γδ T cells, particularly in the synthesis of IgA isotype, remains unclear. We compared Ig expression in T cell receptor delta chain deficient (TCRδ−/−) mice with wild-type mice. The amount of IgA in fecal pellets was substantially elevated in TCRδ−/− mice. This was paralleled by an increase in surface IgA expression and total IgA production by Peyer's patches (PPs) and mesenteric lymph node (MLN) cells. Likewise, the TCRδ−/− mice produced much higher levels of serum IgA isotype. Here, surface IgA expression and number of IgA secreting cells were also elevated in the culture of spleen and bone marrow (BM) B cells. Germ-line α transcript, an indicator of IgA class switch recombination, higher in PP and MLN B cells from TCRδ−/− mice, while it was not seen in inactivated B cells. Nevertheless, the frequency of IgA+ B cells was much higher in the spleen from TCRδ−/− mice. These results suggest that γδ T cells control the early phase of B cells, in order to prevent unnecessary IgA isotype switching. Furthermore, this regulatory role of γδ T cells had lasting effects on the long-lived IgA-producing plasma cells in the BM.
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Affiliation(s)
- Hye-Ju Han
- Department of Molecular Bioscience, College of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
| | - Young-Saeng Jang
- Department of Molecular Bioscience, College of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
| | - Goo-Young Seo
- Department of Molecular Bioscience, College of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
| | - Sung-Gyoo Park
- School of Life Sciences and BioImaging and Immune Synapse Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
| | - Seung Goo Kang
- Division of Biomedical Convergence, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
| | - Hyun-Jeong Ko
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon 24341, Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon 24341, Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, College of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Korea
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18
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Seo GY, Shui JW, Takahashi D, Song C, Wang Q, Kim K, Mikulski Z, Chandra S, Giles DA, Zahner S, Kim PH, Cheroutre H, Colonna M, Kronenberg M. LIGHT-HVEM Signaling in Innate Lymphoid Cell Subsets Protects Against Enteric Bacterial Infection. Cell Host Microbe 2018; 24:249-260.e4. [PMID: 30092201 PMCID: PMC6132068 DOI: 10.1016/j.chom.2018.07.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/19/2018] [Accepted: 07/16/2018] [Indexed: 01/25/2023]
Abstract
Innate lymphoid cells (ILCs) are important regulators of early infection at mucosal barriers. ILCs are divided into three groups based on expression profiles, and are activated by cytokines and neuropeptides. Yet, it remains unknown if ILCs integrate other signals in providing protection. We show that signaling through herpes virus entry mediator (HVEM), a member of the tumor necrosis factor (TNF) receptor superfamily, in ILC3 is important for host defense against oral infection with the bacterial pathogen Yersinia enterocolitica. HVEM stimulates protective interferon-γ (IFN-γ) secretion from ILCs, and mice with HVEM-deficient ILC3 exhibit reduced IFN-γ production, higher bacterial burdens and increased mortality. In addition, IFN-γ production is critical as adoptive transfer of wild-type but not IFN-γ-deficient ILC3 can restore protection to mice lacking ILCs. We identify the TNF superfamily member, LIGHT, as the ligand inducing HVEM signals in ILCs. Thus HVEM signaling mediated by LIGHT plays a critical role in regulating ILC3-derived IFN-γ production for protection following infection. VIDEO ABSTRACT.
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MESH Headings
- Adoptive Transfer
- Adult
- Animals
- Cytokines/metabolism
- Disease Models, Animal
- Enterobacteriaceae Infections/pathology
- Enterobacteriaceae Infections/prevention & control
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- Host-Pathogen Interactions/immunology
- Host-Pathogen Interactions/physiology
- Humans
- Interferon-gamma/metabolism
- Lymphocytes/immunology
- Lymphocytes/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Neuropeptides/metabolism
- Protein Transport
- Receptors, CCR6/genetics
- Receptors, CCR6/metabolism
- Receptors, Tumor Necrosis Factor/metabolism
- Receptors, Tumor Necrosis Factor, Member 14/immunology
- Receptors, Tumor Necrosis Factor, Member 14/metabolism
- Signal Transduction
- Spleen/microbiology
- Spleen/pathology
- Tumor Necrosis Factor Ligand Superfamily Member 14/metabolism
- Yersinia enterocolitica/pathogenicity
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Affiliation(s)
- Goo-Young Seo
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA; Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jr-Wen Shui
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Daisuke Takahashi
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Christina Song
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Qingyang Wang
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Kenneth Kim
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Zbigniew Mikulski
- Microscopy and Histology Core, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Shilpi Chandra
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Daniel A Giles
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Sonja Zahner
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hilde Cheroutre
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Marco Colonna
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Mitchell Kronenberg
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA; Division of Biology, University of California San Diego, La Jolla, CA 92037, USA.
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19
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Cho SY, Song WS, Hong HJ, Lee GS, Kang SG, Ko HJ, Kim PH, Yoon SI. Tetrameric structure of the flagellar cap protein FliD from Serratia marcescens. Acta Crystallogr A Found Adv 2018. [DOI: 10.1107/s0108767318098148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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20
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Seo GY, Shui JW, Takahashi D, Song C, Wang Q, Kim K, Mikulski Z, Chandra S, Giles DA, Zahner S, Kim PH, Cheroutre H, Colonna M, Kronenberg M. LIGHT-HVEM Signaling in Group3 Innate Lymphoid Cells Protects Against Enteric Bacterial Infection. The Journal of Immunology 2018. [DOI: 10.4049/jimmunol.200.supp.114.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Innate lymphoid cells (ILC) are important regulators of early infection at mucosal barriers. They are known to be activated by cytokines and neuropeptides, but it remains to be determined if they integrate other signals in providing protection. The herpes virus entry mediator (HVEM), a member of the TNF receptor superfamily, is expressed by all intestinal ILC subsets. Here, we show that HVEM signaling of ILC3 is important for host defense against oral infection with the enteric bacterial pathogen Yersinia enterocolitica (Y. enterocolitica). Surprisingly, IFNγ production by CCR6 negative ILC3 was strongly implicated in protection, likely because these cells were more numerous than other innate lymphocytes that produced IFNγ early after infection. We identified the TNF superfamily member LIGHT, as the ligand inducing HVEM signals in ILC. Therefore, our results demonstrate a novel role for LIGHT-HVEM signaling in regulating ILC3 IFNγ production and protection following infection.
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Affiliation(s)
| | - Jr-Wen Shui
- 2La Jolla Inst. for Allergy and Immunology
- 3Academia Sinica, Taiwan
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21
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Kim PH, Jang YS, Song HE, Seo GY, Kang SG, Lee JH, Kwon BE, Ko HJ. Mechanism underlying the induction of Foxp3+ regulatory T cells by lactoferrin. The Journal of Immunology 2018. [DOI: 10.4049/jimmunol.200.supp.47.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Lactoferrin (LF) is multifunctional in the immune response. We have previously demonstrated that LF acts like TGF-β in IgA B cell differentiation. Therein, we explored whether LF affects peripheral regulatory T cell (Treg) differentiation. Indeed, LF induced Foxp3+ Treg differentiation by itself and in combination with TGF-β1 synergized to express Foxp3. It was conceivable that LF may increase Foxp3 expression through secretion of active TGF-β or facilitating latent TGF-β to active form. There was little active TGF-β in the supernatant from LF-stimulated T cells. Surprisingly, however, pan anti-TGFβ Ab completely abolished the LF-induced Foxp3 expression, suggesting that membrane-bound TGF-β may be involved. In this, we found that both LF and TGF-β1 increase latency-associated peptide negative (LAP−)TGF-β on the surface of Foxp3+T cells, and this increase was more dramatic when treated with LF plus TGF-β1. As was the case in B cells, LF-induced Foxp3 expression was virtually disappeared by pretreatment with soluble TβRIII. Collectively, these results suggest that LF induces Foxp3+Treg through TβRIII and subsequent expression of membrane-bound/LAP-negative TGF-β.
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Choi W, Shin JH, Kim PH, Han K, Ohm JY, Kim JH, Kim JW. Clinical outcomes of 23 patients who had repeat pelvic arterial embolisation for uncontrolled post-partum haemorrhage at a single centre. Clin Radiol 2018; 73:665-671. [PMID: 29622362 DOI: 10.1016/j.crad.2018.02.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 02/13/2018] [Indexed: 01/23/2023]
Abstract
AIM To evaluate the safety and efficacy of repeated pelvic arterial embolisation (PAE) for uncontrolled postpartum haemorrhage (PPH) after a single session of PAE and to compare angiographic findings between the two sessions of PAE. MATERIALS AND METHODS A total of 23 consecutive patients (age range, 23-44 years) who underwent repeated PAE for uncontrolled PPH between March 2001 and January 2016 in Severance Hospital were reviewed. The interval times between the two sessions of PAE, the angiographic findings, embolic materials, arteries embolised during PAE, and the clinical outcomes were reviewed retrospectively. RESULTS Overall clinical success was achieved after repeated PAE in 21 of 23 patients (91.3%). There were no procedure-related, major complications. On angiography, active bleeding from the uterine collateral arteries was more frequently observed in the second session of PAE (p>0.05), and embolisation of the anterior division of the internal iliac artery was significantly higher during the second session of PAE. Use of permanent embolic materials was significantly higher during the second session of PAE. Recanalisation of a previously embolised artery was identified in 14 patients (60.9%) during the second session. CONCLUSION Repeated PAE is safe and effective for managing recurrent bleeding after a single session of PAE. Repeated PAE is related to a higher chance of embolisation of the anterior division of the internal iliac artery, with the use of permanent embolic materials. Recanalisation of a previously embolised artery seems to be a principal source of rebleeding during a repeated session of PAE.
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Affiliation(s)
- W Choi
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University, College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea.
| | - P H Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - K Han
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University, College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - J Y Ohm
- Department of Radiology, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea
| | - J H Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - J W Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
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23
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Ahn H, Han BC, Kim J, Kang SG, Kim PH, Jang KH, So SH, Lee SH, Lee GS. Nonsaponin fraction of Korean Red Ginseng attenuates cytokine production via inhibition of TLR4 expression. J Ginseng Res 2018; 43:291-299. [PMID: 30976167 PMCID: PMC6437451 DOI: 10.1016/j.jgr.2018.03.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 03/22/2018] [Accepted: 03/26/2018] [Indexed: 11/27/2022] Open
Abstract
Background Ginsenosides of Korean Red Ginseng extracts (RGE) and its saponin components suppress secretion of inflammasome-mediating cytokines, whereas the nonsaponin fraction (NS) of RGE oppositely stimulates cytokine secretion. Although direct exposure of NS to macrophages in mice induces cytokine production, oral administration of NS has not been studied in inflammasome-related disease in animal models. Methods Mice were fed RGE or NS for 7 days and then developed peritonitis. Peritoneal cytokines were measured, and peritoneal exudate cells (PECs) were collected to assay expression levels of a set of toll-like receptors (TLRs) and cytokines in response to NS ingestion. In addition, the role of intestinal bacteria in NS-fed mice was assessed. The effect of preexposure to NS in bone marrow–derived macrophages (BMDMs) on cytokine production was further confirmed. Results NS ingestion attenuated secretion of peritoneal cytokines resulting from peritonitis. In addition, the isolated PECs from NS-fed mice presented lower TLR transcription levels than PECs from control diet–fed mice. BMDMs treated with NS showed downregulation of TLR4 mRNA and protein expression, which was mediated by the TLR4-MyD88-NFκB signal pathway. BMDMs pretreated with NS produced less cytokines in response to TLR4 ligands. Conclusion NS administration directly inhibits TLR4 expression in inflammatory cells such as macrophages, thereby reducing secretion of cytokines during peritonitis.
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Key Words
- Alum, aluminum potassium sulfate
- BMDMs, bone marrow–derived macrophages
- Cytokine
- HKST, heat-killed Salmonella typhimurium
- IL, interleukin
- Korean Red Ginseng extracts
- LB, Luria-Bertani
- LCCM, L929 cell-conditioned medium
- LPS, lipopolysaccharide
- Lys, lysate
- MSU, monosodium urate crystal
- NF-kB, nuclear factor kappa-light-chain-enhancer of activated B cells
- NLRP3, (NOD)2-like receptor protein 3
- NOD, nucleotide-binding and oligomerization domain
- NS, nonsaponin fraction
- Non, nontreatment
- Nonsaponin fraction
- PECs, peritoneal exudate cells
- Peritonitis
- RGE, Korean Red Ginseng extracts
- SF, saponin fraction
- Sup, supernatant
- TLR4
- TLRs, toll-like receptors
- ip, intraperitoneally
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Affiliation(s)
- Huijeong Ahn
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Byung-Cheol Han
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Republic of Korea.,Korea Ginseng Research Institute, Korea Ginseng Corporation, Daejeon, Republic of Korea
| | - Jeongeun Kim
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Seung Goo Kang
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Kyoung Hwa Jang
- Korea Ginseng Research Institute, Korea Ginseng Corporation, Daejeon, Republic of Korea
| | - Seung Ho So
- Korea Ginseng Research Institute, Korea Ginseng Corporation, Daejeon, Republic of Korea
| | - Seung-Ho Lee
- Korea Ginseng Research Institute, Korea Ginseng Corporation, Daejeon, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Republic of Korea
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24
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Ahn H, Kang SG, Yoon SI, Kim PH, Kim D, Lee GS. Poly-gamma-glutamic acid from Bacillus subtilis upregulates pro-inflammatory cytokines while inhibiting NLRP3, NLRC4 and AIM2 inflammasome activation. Cell Mol Immunol 2018; 15:111-119. [PMID: 27133472 PMCID: PMC5811673 DOI: 10.1038/cmi.2016.13] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 01/22/2016] [Accepted: 02/02/2016] [Indexed: 12/30/2022] Open
Abstract
Poly-gamma-glutamic acid (γ-PGA) is a natural, edible and non-toxic polymer synthesized by Bacillus subtilis and is suggested as a safe biomaterial for the use in hydrogels and vaccine adjuvants. However, the effect of γ-PGA on inflammasome activation has not yet been studied in macrophages. Inflammasomes, which are intracellular multi-protein complexes, promote acute and chronic inflammation via interleukin-1β or interleukin-18 maturation, and they are known targets for metabolic syndromes and cancer. In this study, we observed that γ-PGA attenuated NLRP3, NLRC4 and AIM2 inflammasome activation, whereas it upregulated pro-inflammatory cytokine expression in human and murine macrophages. Although γ-PGA had conflicting effects on cytokine production and maturation, it clearly alleviated the severity of lipopolysaccharide-induced endotoxin shock in an animal model. Thus, we suggest γ-PGA as a candidate to control inflammasome-mediated disorders.
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Affiliation(s)
- Huijeong Ahn
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Gangwon, Republic of Korea
| | - Seung Goo Kang
- Department of Systems Immunology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Gangwon, Republic of Korea
| | - Sung-il Yoon
- Department of Systems Immunology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Gangwon, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Doo Kim
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Gangwon, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Gangwon, Republic of Korea
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25
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Abstract
Inflammatory responses are essential in eliminating harmful substrates from damaged tissue and inducing recovery. Several cytokines participate in and facilitate this response. Certain cytokines such as interleukin (IL)-1β and IL-18 are initially produced in precursor form in response to toll-like receptor (TLR) ligands and undergo maturation by inflammasomes, which are cytosolic multi-protein complexes containing nucleotide-binding oligomerization domain (NOD)-containing protein 2-like receptors (NLRs). Immune modulators targeting inflammasomes have been investigated to control inflammatory diseases such as metabolic syndrome. However, most immune modulators possessing anti-inflammasome properties attenuate production of other cytokines, which are essential for host defense. In this review, we analyzed the effect of anti-inflammasome agents on the production of cytokines which are not regulated by inflammasome and involving in initial immune responses. As a result, the inflammasome inhibitors are put into three categories: non-effector, stimulator, or inhibitor of cytokine production. Even the stimulator of cytokine production ameliorated symptoms resulting from inflammasome activation in mouse models. Thus, we suggest ideal immune modulators targeting inflammasomes in order to enhance cytokine production while inhibiting cytokine maturation.
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Affiliation(s)
- Huijeong Ahn
- College of Veterinary Medicine and Institute of Veterinary Science
| | - Hyuk Moo Kwon
- College of Veterinary Medicine and Institute of Veterinary Science
| | - Eunsong Lee
- College of Veterinary Medicine and Institute of Veterinary Science
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Eui-Bae Jeung
- Lab. of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine and Institute of Veterinary Science
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26
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Kim PH, Hauer BD, Clark TJ, Fani Sani F, Freeman MR, Davis JP. Magnetic actuation and feedback cooling of a cavity optomechanical torque sensor. Nat Commun 2017; 8:1355. [PMID: 29116095 PMCID: PMC5677085 DOI: 10.1038/s41467-017-01380-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 09/11/2017] [Indexed: 12/01/2022] Open
Abstract
Cavity optomechanics has demonstrated remarkable capabilities, such as measurement and control of mechanical motion at the quantum level. Yet many compelling applications of optomechanics—such as microwave-to-telecom wavelength conversion, quantum memories, materials studies, and sensing applications—require hybrid devices, where the optomechanical system is coupled to a separate, typically condensed matter, system. Here, we demonstrate such a hybrid optomechanical system, in which a mesoscopic ferromagnetic needle is integrated with an optomechanical torsional resonator. Using this system we quantitatively extract the magnetization of the needle, not known a priori, demonstrating the potential of this system for studies of nanomagnetism. Furthermore, we show that we can magnetically dampen its torsional mode from room-temperature to 11.6 K—improving its mechanical response time without sacrificing torque sensitivity. Future extensions will enable studies of high-frequency spin dynamics and broadband wavelength conversion via torque mixing. Although optomechanics enables precision metrology, measurements beyond mechanical properties often require hybrid devices. Here, Kim et al. demonstrate that a ferromagnetic needle integrated with a torsional resonator can determine the magnetic properties and amplify or cool the resonator motion.
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Affiliation(s)
- P H Kim
- Department of Physics, University of Alberta, Edmonton, AB, Canada, T6G 2E9
| | - B D Hauer
- Department of Physics, University of Alberta, Edmonton, AB, Canada, T6G 2E9
| | - T J Clark
- Department of Physics, University of Alberta, Edmonton, AB, Canada, T6G 2E9
| | - F Fani Sani
- Department of Physics, University of Alberta, Edmonton, AB, Canada, T6G 2E9
| | - M R Freeman
- Department of Physics, University of Alberta, Edmonton, AB, Canada, T6G 2E9
| | - J P Davis
- Department of Physics, University of Alberta, Edmonton, AB, Canada, T6G 2E9.
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27
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Seo GY, Lee JM, Jang YS, Kang SG, Yoon SI, Ko HJ, Lee GS, Park SR, Nagler CR, Kim PH. Mechanism underlying the suppressor activity of retinoic acid on IL4-induced IgE synthesis and its physiological implication. Cell Immunol 2017; 322:49-55. [PMID: 29042055 DOI: 10.1016/j.cellimm.2017.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 09/11/2017] [Accepted: 10/03/2017] [Indexed: 12/25/2022]
Abstract
The present study extends an earlier report that retinoic acid (RA) down-regulates IgE Ab synthesis in vitro. Here, we show the suppressive activity of RA on IgE production in vivo and its underlying mechanisms. We found that RA down-regulated IgE class switching recombination (CSR) mainly through RA receptor α (RARα). Additionally, RA inhibited histone acetylation of germ-line ε (GL ε) promoter, leading to suppression of IgE CSR. Consistently, serum IgE levels were substantially elevated in vitamin A-deficient (VAD) mice and this was more dramatic in VAD-lecithin:retinol acyltransferase deficient (LRAT-/-) mice. Further, serum mouse mast cell protease-1 (mMCP-1) level was elevated while frequency of intestinal regulatory T cells (Tregs) were diminished in VAD LRAT-/- mice, reflecting that deprivation of RA leads to allergic immune response. Taken together, our results reveal that RA has an IgE-repressive activity in vivo, which may ameliorate IgE-mediated allergic disease.
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Affiliation(s)
- Goo-Young Seo
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea; Department of Pathology and Committee on Immunology, The University of Chicago, 924 East 57th Street, R120, Chicago, IL 60637, USA
| | - Jeong-Min Lee
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Young-Saeng Jang
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Seung Goo Kang
- Division of Biomedical Convergence, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyun-Jeong Ko
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Seok-Rae Park
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea
| | - Cathryn R Nagler
- Department of Pathology and Committee on Immunology, The University of Chicago, 924 East 57th Street, R120, Chicago, IL 60637, USA
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea.
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28
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Cho SY, Song WS, Hong HJ, Lee GS, Kang SG, Ko HJ, Kim PH, Yoon SI. Tetrameric structure of the flagellar cap protein FliD from Serratia marcescens. Biochem Biophys Res Commun 2017; 489:63-69. [PMID: 28527888 DOI: 10.1016/j.bbrc.2017.05.093] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 05/16/2017] [Indexed: 11/30/2022]
Abstract
Bacterial motility is provided by the flagellum. FliD is located at the distal end of the flagellum and plays a key role in the insertion of each flagellin protein at the growing tip of the flagellar filament. Because FliD functions as an oligomer, the determination of the oligomeric state of FliD is critical to understanding the molecular mechanism of FliD-mediated flagellar growth. FliD has been shown to adopt a pentameric or a hexameric structure depending on the bacterial species. Here, we report another distinct oligomeric form of FliD based on structural and biochemical studies. The crystal structures of the D2 and D3 domains of Serratia marcescens FliD (smFliD) were determined in two crystal forms and together revealed that smFliD assembles into a tetrameric architecture that resembles a four-pointed star plate. smFliD tetramerization was also confirmed in solution by cross-linking experiments. Although smFliD oligomerizes in a head-to-tail orientation using a common primary binding interface between the D2 and D3' domains (the prime denotes the second subunit in the oligomer) similarly to other FliD orthologs, the smFliD tetramer diverges to present a unique secondary D2-D2' binding interface. Our structure-based comparative analysis of FliD suggests that bacteria have developed diverse species-specific oligomeric forms of FliD that range from tetramers to hexamers for flagellar growth.
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Affiliation(s)
- So Yeon Cho
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Wan Seok Song
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ho Jeong Hong
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Seung Goo Kang
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyun-Jeong Ko
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sung-Il Yoon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea; Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea.
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29
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Seo GY, Shui JW, Mikulski Z, Cheroutre H, Kim PH, Kronenberg M. HVEM expression by intestinal epithelial cells modulates the microbiome and epithelial immunity. The Journal of Immunology 2017. [DOI: 10.4049/jimmunol.198.supp.200.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
The herpes virus entry mediator (HVEM), a member of the tumor necrosis factor receptor superfamily (TNFRSF), is highly expressed by intestinal epithelial cells (IEC). Previously, we reported that HVEM expression by epithelial cells was required for innate immune defense from acute infections in the lung and the intestine (Nature 488:222,2012). Here, we demonstrate a novel, constitutive role of HVEM expression by IEC in microbial homeostasis and epithelial immunity. Mice with an epithelial-specific deletion of the gene encoding HVEM (HvemΔIEC) had significantly increased segmented filamentous bacteria (SFB). This caused an increase in Th17 cells and IL-22+ILC3s in the intestine lamina propria. HvemΔIEC mice also exhibited increased goblet cell hypertrophy and hyperplasia, crypt hyperplasia, villous atrophy as they aged, and they showed a severe defect in fucosylation of cell surface proteins, even at younger ages. Treatment with the antibiotic vancomycin eliminated SFB and decreased Th17 cells and ILC3, but did not reverse the defect in fucosylation. Our findings suggest that epithelial cell expression of HVEM is important at steady state both for shaping the intestinal microbiota and for the homeostasis of IEC in the intestine.
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Affiliation(s)
- Goo-Young Seo
- 1La Jolla Inst. for Allergy and Immunology
- 2Kangwon Natl. Univ., South Korea
| | - Jr-Wen Shui
- 1La Jolla Inst. for Allergy and Immunology
- 3Academia Sinica, Taiwan
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30
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Seo GY, Shui JW, Takahashi D, Song C, Mikulski Z, Kim PH, Cheroutre H, Colonna M, Kronenberg M. HVEM expression by innate lymphoid cells protects against enteric bacterial infection. The Journal of Immunology 2017. [DOI: 10.4049/jimmunol.198.supp.200.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Yersinia enterocolitica causes food-borne disease and targets the small intestine, in which ILC3 are the predominant ILC subset. Here we show that ILC3 are required for protection of mice from oral Y. enterocolitica, as mice lacking ILC3 were more susceptible and transfer of ILC to recipients was protective. IFNγ is a cytokine required for host defense from this pathogen, and while ILC in the small intestine did not increase in number they greatly increased IFNγ production after infection. The herpes virus entry mediator (HVEM), a member of the TNF receptor superfamily (TNFRSF), is expressed by all intestinal ILC subsets. Mice with a deficiency of HVEM expression in RORγt+ ILC had a reduced steady-state IL-22 production, and in vitro HVEM could signal to ILC3 to stimulate IL-22 secretion. Moreover, following oral infection with Y. enterocolitica, mice with HVEM deficiency mediated by Rorc-cre showed reduced survival and increased bacterial translocation early after infection. Cytokines are known to induce ILC activation, but our results demonstrate a novel role for the cell surface receptor HVEM in regulating ILC3 cytokine production, both at steady state, and as a critical survival factor during acute infection.
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Affiliation(s)
- Goo-Young Seo
- 1La Jolla Inst. for Allergy and Immunology
- 2Kangwon Natl. Univ., South Korea
| | - Jr-Wen Shui
- 1La Jolla Inst. for Allergy and Immunology
- 3Academia Sinica, Taiwan
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31
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Jin HY, Oda H, Chen P, Yang C, Zhou X, Kang SG, Valentine E, Kefauver JM, Liao L, Zhang Y, Gonzalez-Martin A, Shepherd J, Morgan GJ, Mondala TS, Head SR, Kim PH, Xiao N, Fu G, Liu WH, Han J, Williamson JR, Xiao C. Differential Sensitivity of Target Genes to Translational Repression by miR-17~92. PLoS Genet 2017; 13:e1006623. [PMID: 28241004 PMCID: PMC5348049 DOI: 10.1371/journal.pgen.1006623] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 03/13/2017] [Accepted: 02/08/2017] [Indexed: 12/19/2022] Open
Abstract
MicroRNAs (miRNAs) are thought to exert their functions by modulating the expression of hundreds of target genes and each to a small degree, but it remains unclear how small changes in hundreds of target genes are translated into the specific function of a miRNA. Here, we conducted an integrated analysis of transcriptome and translatome of primary B cells from mutant mice expressing miR-17~92 at three different levels to address this issue. We found that target genes exhibit differential sensitivity to miRNA suppression and that only a small fraction of target genes are actually suppressed by a given concentration of miRNA under physiological conditions. Transgenic expression and deletion of the same miRNA gene regulate largely distinct sets of target genes. miR-17~92 controls target gene expression mainly through translational repression and 5’UTR plays an important role in regulating target gene sensitivity to miRNA suppression. These findings provide molecular insights into a model in which miRNAs exert their specific functions through a small number of key target genes. MicroRNAs (miRNAs) are small RNAs encoded by our genome. Each miRNA binds hundreds of target mRNAs and performs specific functions. It is thought that miRNAs exert their function by reducing the expression of all these target genes and each to a small degree. However, these target genes often have very diverse functions. It has been unclear how small changes in hundreds of target genes with diverse functions are translated into the specific function of a miRNA. Here we take advantage of recent technical advances to globally examine the mRNA and protein levels of 868 target genes regulated by miR-17~92, the first oncogenic miRNA, in mutant mice with transgenic overexpression or deletion of this miRNA gene. We show that miR-17~92 regulates target gene expression mainly at the protein level, with little effect on mRNA. Surprisingly, only a small fraction of target genes respond to miR-17~92 expression changes. Further studies show that the sensitivity of target genes to miR-17~92 is determined by a non-coding region of target mRNA. Our findings demonstrate that not every target gene is equal, and suggest that the function of a miRNA is mediated by a small number of key target genes.
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Affiliation(s)
- Hyun Yong Jin
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, United States of America
- Kellogg School of Science and Technology, The Scripps Research Institute, La Jolla, California, United States of America
| | - Hiroyo Oda
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, United States of America
| | - Pengda Chen
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Chao Yang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Xiaojuan Zhou
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Seung Goo Kang
- Division of Biomedical Convergence/Institute of Bioscience & Biotechnology, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Elizabeth Valentine
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, California, United States of America
| | - Jennifer M. Kefauver
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, United States of America
- Kellogg School of Science and Technology, The Scripps Research Institute, La Jolla, California, United States of America
| | - Lujian Liao
- Shanghai Key Laboratory of Regulatory Biology, Shanghai Key Laboratory of Brain Functional Genomics (Ministry of Education), School of Life Sciences, East China Normal University, Shanghai, China
| | - Yaoyang Zhang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Alicia Gonzalez-Martin
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, United States of America
| | - Jovan Shepherd
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, United States of America
| | - Gareth J. Morgan
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California, United States of America
| | - Tony S. Mondala
- Next Generation Sequencing Core, The Scripps Research Institute, La Jolla, California, United States of America
| | - Steven R. Head
- Next Generation Sequencing Core, The Scripps Research Institute, La Jolla, California, United States of America
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience/Institute of Bioscience & Biotechnology, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Nengming Xiao
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Guo Fu
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Wen-Hsien Liu
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Jiahuai Han
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - James R. Williamson
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, California, United States of America
| | - Changchun Xiao
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, United States of America
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
- * E-mail:
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Kim JG, Kwon HJ, Wu G, Park Y, Lee JY, Kim J, Kim SC, Choe M, Kang SG, Seo GY, Kim PH, Park JB. RhoA GTPase oxidation stimulates cell proliferation via nuclear factor-κB activation. Free Radic Biol Med 2017; 103:57-68. [PMID: 27974245 DOI: 10.1016/j.freeradbiomed.2016.12.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 12/09/2016] [Accepted: 12/10/2016] [Indexed: 12/15/2022]
Abstract
Reactive oxygen species (ROS) produced by many kinds of stimuli are essential for cellular signaling including cell proliferation. The dysregulation of ROS, therefore, is related to a variety of diseases including cancer. However, it was not clearly elucidated how ROS regulate cell proliferation and tumorigenesis. In this study, we investigated a mechanism by which the oxidation of RhoA GTPase regulates nuclear factor-κB (NF-κB) and cell proliferation. Hydrogen peroxide activated NF-κB and RhoA GTPase, but did not activate RhoA C16/20A mutant, an oxidation-resistant form. Remarkably, the oxidation of RhoA reduced its affinity towards RhoGDI, leading to the dissociation of RhoA-RhoGDI complex. Si-Vav2, a guanine nucleotide exchange factor (GEF), inhibited RhoA activation upon hydrogen peroxide. The oxidized RhoA (oxRhoA)-GTP was readily bound to IκB kinase γ (IKKγ), whereas oxidized RhoGDI did not bind to IKKγ. The oxRhoA-GTP bound to IKKγ activated IKKβ, leading to IκB phosphorylation and degradation, consequently NF-κB activation. Hydrogen peroxide induced cell proliferation, but RhoA C16/20A mutant suppressed cell proliferation and tumorigenesis. Conclusively, RhoA oxidation at Cys16/20 is critically involved in cell proliferation and tumorigenesis through NF-κB activation in response to ROS.
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Affiliation(s)
- Jae-Gyu Kim
- Department of Biochemistry, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea
| | - Hyung-Joo Kwon
- Department of Microbiology, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea; Center for Medical Science Research, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea
| | - Guang Wu
- Center for Medical Science Research, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea
| | - Yohan Park
- Department of Biochemistry, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea
| | - Jae-Yong Lee
- Department of Biochemistry, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea; Institute of Cell Differentiation and Ageing, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea
| | - Jaebong Kim
- Department of Biochemistry, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea; Institute of Cell Differentiation and Ageing, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea
| | - Sung-Chan Kim
- Department of Biochemistry, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea; Institute of Cell Differentiation and Ageing, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea
| | - Myoen Choe
- Department of Bio-Health and Technology, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Kangwon-do 24341, Republic of Korea
| | - Seung Goo Kang
- Division of Biomedical Convergence, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Kangwon-do 24341, Republic of Korea
| | - Goo-Young Seo
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Kangwon-do 24341, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Kangwon-do 24341, Republic of Korea
| | - Jae-Bong Park
- Department of Biochemistry, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea; Center for Medical Science Research, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea; Institute of Cell Differentiation and Ageing, Hallym University College of Medicine, Chuncheon, Kangwon-do 24252, Republic of Korea.
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Kim JG, Kim MJ, Choi WJ, Moon MY, Kim HJ, Lee JY, Kim J, Kim SC, Kang SG, Seo GY, Kim PH, Park JB. Wnt3A Induces GSK-3β Phosphorylation and β-Catenin Accumulation Through RhoA/ROCK. J Cell Physiol 2016; 232:1104-1113. [DOI: 10.1002/jcp.25572] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 08/29/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Jae-Gyu Kim
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Myoung-Ju Kim
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Won-Ji Choi
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Mi-Young Moon
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Hee-Jun Kim
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Jae-Yong Lee
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
- Institute of Cell Differentiation and Aging; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Jaebong Kim
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
- Institute of Cell Differentiation and Aging; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Sung-Chan Kim
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
- Institute of Cell Differentiation and Aging; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
| | - Seung Goo Kang
- Division of Biomedical Convergence; School of Biomedical Science and Institute of Bioscience and Biotechnology; Kangwon National University; Chuncheon Kangwon-do Republic of Korea
| | - Goo-Young Seo
- Department of Molecular Bioscience; School of Biomedical Science and Institute of Bioscience and Biotechnology; Kangwon National University; Chuncheon Kangwon-do Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience; School of Biomedical Science and Institute of Bioscience and Biotechnology; Kangwon National University; Chuncheon Kangwon-do Republic of Korea
| | - Jae-Bong Park
- Department of Biochemistry; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
- Institute of Cell Differentiation and Aging; Hallym University College of Medicine; Chuncheon Kangwon-do Republic of Korea
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Seo BS, Yoon HK, Shin J, Park HY, Lee SH, Lee JE, Yoo YC, Lee J, Kim PH, Park SR. Cloning and analysis of promoter region of mouse immunoglobulin germline γ3 transcripts. Genes Genomics 2016. [DOI: 10.1007/s13258-016-0450-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kim PH, Hauer BD, Doolin C, Souris F, Davis JP. Approaching the standard quantum limit of mechanical torque sensing. Nat Commun 2016; 7:13165. [PMID: 27762273 PMCID: PMC5080439 DOI: 10.1038/ncomms13165] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 09/07/2016] [Indexed: 11/23/2022] Open
Abstract
Reducing the moment of inertia improves the sensitivity of a mechanically based torque sensor, the parallel of reducing the mass of a force sensor, yet the correspondingly small displacements can be difficult to measure. To resolve this, we incorporate cavity optomechanics, which involves co-localizing an optical and mechanical resonance. With the resulting enhanced readout, cavity-optomechanical torque sensors are now limited only by thermal noise. Further progress requires thermalizing such sensors to low temperatures, where sensitivity limitations are instead imposed by quantum noise. Here, by cooling a cavity-optomechanical torque sensor to 25 mK, we demonstrate a torque sensitivity of 2.9 yNm/. At just over a factor of ten above its quantum-limited sensitivity, such cryogenic optomechanical torque sensors will enable both static and dynamic measurements of integrated samples at the level of a few hundred spins.
Cavity optomechanics enables measurement of torque at levels unattainable by previous techniques, but the main obstacle to improved sensitivity is thermal noise. Here the authors present cryogenic measurement of a cavity-optomechanical torsional resonator with unprecedented torque sensitivity of 2.9 yNm/√Hz.
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Affiliation(s)
- P H Kim
- Department of Physics, University of Alberta, CCIS 3-199, Edmonton, Alberta, Canada T6G 2E9
| | - B D Hauer
- Department of Physics, University of Alberta, CCIS 3-199, Edmonton, Alberta, Canada T6G 2E9
| | - C Doolin
- Department of Physics, University of Alberta, CCIS 3-199, Edmonton, Alberta, Canada T6G 2E9
| | - F Souris
- Department of Physics, University of Alberta, CCIS 3-199, Edmonton, Alberta, Canada T6G 2E9
| | - J P Davis
- Department of Physics, University of Alberta, CCIS 3-199, Edmonton, Alberta, Canada T6G 2E9
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Kim WS, Kim PH, Shimazaki KI. Sensitivity of Pseudomonas syringae to Bovine Lactoferrin Hydrolysates and Identification of a Novel Inhibitory Peptide. Korean J Food Sci Anim Resour 2016; 36:487-93. [PMID: 27621689 PMCID: PMC5018508 DOI: 10.5851/kosfa.2016.36.4.487] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/04/2016] [Indexed: 01/06/2023] Open
Abstract
The antimicrobial activity of bovine lactoferrin hydrolysates (bLFH) was measured against Pseudomonas strains (P. syringae and P. fluorescens) in vitro. To compare susceptibility to bLFH, minimal inhibitory concentration (MIC) values were determined using chemiluminescence assays and paper disc plate assays. Antimicrobial effect against P. fluorescens was not observed by either assay, suggesting that bLFH did not exhibit antimicrobial activity against P. fluorescens. However, a significant inhibition of P. syringae growth was observed in the presence of bLFH. The addition of bLFH in liquid or solid medium inhibited growth of P. syringae in a dose-dependent manner. Furthermore, a bLFH peptide with antimicrobial activity toward P. syringae was isolated and identified. The N-terminal amino acid sequences of thus obtained antimicrobial bLFH peptides were analyzed by a protein sequencer and were found to be Leu-Arg-Ile-Pro-Ser-Lys-Val-Asp-Ser-Ala and Phe-Lys-Cys-Arg-Arg-Trp-Gln-Trp-Arg-Met. The latter peptide sequence is known to be characteristic of lactoferricin. Therefore, in the present study, we identified a new antimicrobial peptide against P. syringae, present within the N-terminus and possessing the amino acid sequence of Leu-Arg-Ile-Pro-Ser-Lys-Val-Asp-Ser-Ala.
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Affiliation(s)
- Woan-Sub Kim
- Department of Animal Life and Environmental Science, Hankyong National University, Anseong 17579, Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea
| | - Kei-Ichi Shimazaki
- Dairy Food Science Laboratory, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
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Park SC, Kim PH, Lee GS, Kang SG, Ko HJ, Yoon SI. Structural and biochemical characterization of the Bacillus cereus 3-hydroxyisobutyrate dehydrogenase. Biochem Biophys Res Commun 2016; 474:522-527. [DOI: 10.1016/j.bbrc.2016.04.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 04/23/2016] [Indexed: 10/21/2022]
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Seo GY, Shui JW, Takahashi D, Kim PH, Kronenberg M. Hvem expression in innate lymphoid cells mediates host defense against intestinal infection. The Journal of Immunology 2016. [DOI: 10.4049/jimmunol.196.supp.208.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
The herpes virus entry mediator (HVEM), a member of the tumor necrosis factor receptor super family (TNFRSF14), has diverse functions in augmenting or inhibiting the immune response. We previously reported that epithelial HVEM signaling at mucosal barriers provides host defense against pathogenic bacteria, but the role of HVEM expression in innate lymphoid cells (ILC) in the mucosal immune system was unknown. To address this issue, we exposed RORgt-Cre × Hvemfl/fl mice with Yersinia enterocolitica (Y. enterocolitica), a small intestine infection model. We found increased bacterial translocation and decreased survival at an early time point. In these mice, Hvem is deleted in NK cells, ILC3 and in all T lymphocytes. Ifng−/− mice also showed reduced survival and increased bacterial translocation early after infection with Y. enterocolitica, demonstrating the importance of this cytokine for host defense. Interestingly, ILC from infected RORgt-Cre × Hvemfl/fl mice produced less IFNg after infection, but IFNg production by CD4+ T cells was not affected. Furthermore, in CD4-Cre × Hvemfl/fl mice, which deleted HVEM only in CD4+ T cells but not in ILCs, were not more susceptible to Y. enterocolitica. Additionally, we found that depletion of ILC from Rag1-deficient mice resulted in increased bacterial translocation and decreased body weight at an early time point. Taken together, our data indicate first, that IFNg production by ILCs, such as NK cells and ILC3, is important for host defense during Y. enterocolitica infection. Second, although the activation of ILCs is regulated by cytokines, our data show that HVEM, a member of the TNF super family, also is required for their ability to respond by producing IFNg early after infection.
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Affiliation(s)
- Goo-Young Seo
- 1La Jolla Inst. for Allergy and Immunology
- 2Kangwon Natl. Univ., South Korea
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Kim PH, Kim SJ, Seo GY, Kim HJ, Kwon BE, Ko HJ, Rhee KJ, Kim WS. Optimum differentiation conditions of lactoferrin/TGFβ-caused inducible regulatory T cells. The Journal of Immunology 2016. [DOI: 10.4049/jimmunol.196.supp.133.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
TGF-β1 and retinoic acid (RA) are well known to stimulate naïve T cells to differentiate into regulatory T cells (Tregs). In the present study, we found that, as assessed by Foxp3 expression, lactoferrin (LF) not only promotes the TGFβ/RA-mediated Treg differentiation but it also induces Treg differentiation by itself. Furthermore, LF in combination with TGF-β1 powerfully enhanced Foxp3 expression at the transcriptional and protein levels. In this, our extensive kinetic study led the maximum Foxp3 expression within 36 h of culture. These Foxp3+ CD4+T cells strongly suppressed the proliferation of CD4+T cells activated with αCD3 and αCD28 Ab. Finally, phenotypes of these Foxp3+ CD4+T cells were CD44hi CD62Lhi, T-betlo, IFN-γlo, GATA3lo, and IL-4lo. Our optimized Treg differentiation condition would be useful when Treg adoptive transfer is required for various immunosuppressive therapies.
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Park HY, Lee SH, Lee KS, Yoon HK, Yoo YC, Lee J, Choi JE, Kim PH, Park SR. Ginsenoside Rg1 and 20(S)-Rg3 Induce IgA Production by Mouse B Cells. Immune Netw 2015; 15:331-6. [PMID: 26770188 PMCID: PMC4700410 DOI: 10.4110/in.2015.15.6.331] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 11/27/2015] [Accepted: 11/30/2015] [Indexed: 02/06/2023] Open
Abstract
Ginsenosides are the major components of ginseng, which is known to modulate blood pressure, metabolism, and immune function, and has been used to treat various diseases. It has been reported that ginseng and several ginsenosides have immunoregulatory effects on the innate and T cell-mediated immune response. However, their effects on the humoral immune response have not been fully explored. The present study examined the direct effects of red ginseng extract (RGE) and ginsenosides on mouse B cell proliferation and on antibody production and the expression of germline transcripts (GLT) by mouse B cells in vitro. RGE slightly reduced B cell proliferation, but increased IgA production by LPS-stimulated B cells. Furthermore, ginsenoside Rg1 and 20(S)-Rg3 selectively induced IgA production and expression of GLTα transcripts by LPS-stimulated B cells. Collectively, these results suggest that ginsenoside Rg1 and 20(S)-Rg3 can drive the differentiation of B cells into IgA-producing cells through the selective induction of GLTα expression.
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Affiliation(s)
- Ha-Yan Park
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Korea.; Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Korea
| | - Sang-Hoon Lee
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Korea.; Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Korea
| | - Kyu-Seon Lee
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Korea.; Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Korea
| | - Hee-Kyung Yoon
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Korea.; Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Korea
| | - Yung-Choon Yoo
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Korea.; Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Korea
| | - Junglim Lee
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Korea.; Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Korea
| | - Jae Eul Choi
- College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea
| | - Seok-Rae Park
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 35365, Korea.; Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Korea
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Lee JM, Jang YS, Jin BR, Kim SJ, Kim HJ, Kwon BE, Ko HJ, Yoon SI, Lee GS, Kim WS, Seo GY, Kim PH. Retinoic acid enhances lactoferrin-induced IgA responses by increasing betaglycan expression. Cell Mol Immunol 2015; 13:862-870. [PMID: 26277894 DOI: 10.1038/cmi.2015.73] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 06/23/2015] [Accepted: 06/23/2015] [Indexed: 01/04/2023] Open
Abstract
Lactoferrin (LF) and retinoic acid (RA) are enriched in colostrum, milk, and mucosal tissues. We recently showed that LF-induced IgA class switching through binding to betaglycan (transforming growth factor-beta receptor III, TβRIII) and activation of canonical TGF-β signaling. We investigated the combined effect of LF and RA on the overall IgA response. An increase in IgA production by LF was further augmented by RA. This combination effect was also evident in Ig germ-line α (GLα) transcription and GLα promoter activity, indicating that LF in cooperation with RA increased IgA isotype switching. We subsequently found that RA enhanced TβRIII expression and that this increase contributed to LF-stimulated IgA production. In addition to the IgA response, LF and RA in combination also enhanced the expression of the gut-homing molecules C-C chemokine receptor 9 (CCR9) and α4β7 on B cells. Finally, peroral administration of LF and RA enhanced the frequency of CCR9+IgA+ plasma cells in the lamina propria. Taken together, these results suggest that LF in cooperation with RA can contribute to the establishment of gut IgA responses.
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Affiliation(s)
- Jeong-Min Lee
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Young-Saeng Jang
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Bo-Ra Jin
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Sun-Jin Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Hyeon-Jin Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Bo-Eun Kwon
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, Republic of Korea
| | - Hyun-Jeong Ko
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, Republic of Korea
| | - Sung-Il Yoon
- Department of Systems Immunology, College of Biomedical Science, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 200-701, Republic of Korea
| | - Woan-Sub Kim
- Department of Animal Life and Environmental Science, College of Agriculture and Life Science, Hankyong National University, Anseong-si 456-749, Republic of Korea
| | - Goo-Young Seo
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
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Kang SH, Jin BR, Kim HJ, Seo GY, Jang YS, Kim SJ, An SJ, Park SR, Kim WS, Kim PH. Lactoferrin Combined with Retinoic Acid Stimulates B1 Cells to Express IgA Isotype and Gut-homing Molecules. Immune Netw 2015; 15:37-43. [PMID: 25713507 PMCID: PMC4338266 DOI: 10.4110/in.2015.15.1.37] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Revised: 01/23/2015] [Accepted: 01/26/2015] [Indexed: 12/03/2022] Open
Abstract
It is well established that TGF-β1 and retinoic acid (RA) cause IgA isotype switching in mice. We recently found that lactoferrin (LF) also has an activity of IgA isotype switching in spleen B cells. The present study explored the effect of LF on the Ig production by mouse peritoneal B cells. LF, like TGF-β1, substantially increased IgA production in peritoneal B1 cells but little in peritoneal B2 cells. In contrast, LF increased IgG2b production in peritoneal B2 cells much more strongly than in peritoneal B1 cells. LF in combination with RA further enhanced the IgA production and, interestingly, this enhancement was restricted to IgA isotype and B1 cells. Similarly, the combination of the two molecules also led to expression of gut homing molecules α4β7 and CCR9 on peritoneal B1 cells, but not on peritoneal B2 cells. Thus, these results indicate that LF and RA can contribute to gut IgA response through stimulating IgA isotype switching and expression of gut-homing molecules in peritoneal B1 cells.
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Affiliation(s)
- Seong-Ho Kang
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Bo-Ra Jin
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Hyeon-Jin Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Goo-Young Seo
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Young-Saeng Jang
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Sun-Jin Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Sun-Jin An
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Seok-Rae Park
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 302-718, Korea
| | - Woan-Sub Kim
- Department of Animal Life and Environmental Science, College of Agriculture and Life Science, Hankyong National University, Anseong 456-749, Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
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MacDonald AJR, Popowich GG, Hauer BD, Kim PH, Fredrick A, Rojas X, Doolin P, Davis JP. Optical microscope and tapered fiber coupling apparatus for a dilution refrigerator. Rev Sci Instrum 2015; 86:013107. [PMID: 25638072 DOI: 10.1063/1.4905682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have developed a system for tapered fiber measurements of optomechanical resonators inside a dilution refrigerator, which is compatible with both on- and off-chip devices. Our apparatus features full three-dimensional control of the taper-resonator coupling conditions enabling critical coupling, with an overall fiber transmission efficiency of up to 70%. Notably, our design incorporates an optical microscope system consisting of a coherent bundle of 37,000 optical fibers for real-time imaging of the experiment at a resolution of ∼1 μm. We present cryogenic optical and optomechanical measurements of resonators coupled to tapered fibers at temperatures as low as 9 mK.
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Affiliation(s)
- A J R MacDonald
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
| | - G G Popowich
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
| | - B D Hauer
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
| | - P H Kim
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
| | - A Fredrick
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
| | - X Rojas
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
| | - P Doolin
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
| | - J P Davis
- Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G7, Canada
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Lee SH, Kim PH, Oh SM, Park JH, Yoo YC, Lee J, Park SR. SUMO Proteins are not Involved in TGF-β1-induced, Smad3/4-mediated Germline α Transcription, but PIASy Suppresses it in CH12F3-2A B Cells. Immune Netw 2014; 14:321-7. [PMID: 25550698 PMCID: PMC4275389 DOI: 10.4110/in.2014.14.6.321] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 11/26/2014] [Accepted: 12/02/2014] [Indexed: 12/21/2022] Open
Abstract
TGF-β induces IgA class switching by B cells. We previously reported that Smad3 and Smad4, pivotal TGF-β signal-transducing transcription factors, mediate germline (GL) α transcription induced by TGF-β1, resulting in IgA switching by mouse B cells. Post-translational sumoylation of Smad3 and Smad4 regulates TGF-β-induced transcriptional activation in certain cell types. In the present study, we investigated the effect of sumoylation on TGF-β1-induced, Smad3/4-mediated GLα transcription and IgA switching by mouse B cell line, CH12F3-2A. Overexpression of small ubiquitin-like modifier (SUMO)-1, SUMO-2 or SUMO-3 did not affect TGF-β1-induced, Smad3/4-mediated GLα promoter activity, expression of endogenous GLα transcripts, surface IgA expression, and IgA production. Next, we tested the effect of the E3 ligase PIASy on TGF-β1-induced, Smad3/4-mediated GLα promoter activity. We found that PIASy overexpression suppresses the GLα promoter activity in cooperation with histone deacetylase 1. Taken together, these results suggest that SUMO itself does not affect regulation of GLα transcription and IgA switching induced by TGF-β1/Smad3/4, while PIASy acts as a repressor.
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Affiliation(s)
- Sang-Hoon Lee
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 302-718, Korea
| | - Pyeung-Hyeun Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
| | - Sang-Muk Oh
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 302-718, Korea
| | - Jung-Hwan Park
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 302-718, Korea
| | - Yung-Choon Yoo
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 302-718, Korea
| | - Junglim Lee
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 302-718, Korea
| | - Seok-Rae Park
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 302-718, Korea
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Sfakianos JP, Hakimi AA, Kim PH, Zabor EC, Mano R, Bernstein M, Karellas M, Russo P. Outcomes in patients undergoing nephrectomy for renal cancer on chronic anticoagulation therapy. Eur J Surg Oncol 2014; 40:1700-5. [PMID: 24813810 DOI: 10.1016/j.ejso.2014.04.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/12/2014] [Accepted: 04/14/2014] [Indexed: 11/19/2022] Open
Abstract
AIMS To report our experience on surgical resection of renal tumors for patients with a history of chronic anticoagulation (ACT) or aspirin use. METHODS We performed a retrospective analysis of 2473 patients who underwent surgery for renal tumors between 2005 and 2012. Prior to surgery, 172 were on chronic ACT and 695 on aspirin. Multivariable linear and logistic regression models were used to compare transfusion and overall complication rates between patients undergoing renal surgery who were on therapy to patients who were on aspirin and to patients with no therapy. RESULTS Compared to no therapy and aspirin patients those on ACT were older (57.3 (IQR 48.4-66.10) vs 63.9, (IQR 57.3-71.5) vs 68.4, (IQR 60.4-73.5); p < 0.001), with a higher percentage having an ASA score of 3 or 4 (42.4 vs 57.9 vs 82.6%; p < 0.001), respectively. ACT patients had a higher 30-day transfusion rate, 22.7% vs 7.6% vs 6.9%, and 90-day complication rate, 17.4% vs 7.2% vs 7.3%, both p < 0.001. The median length of stay differed statistically between groups (p < 0.001), with a modest longer stay in the anticoagulation group (OR 1.11 SE 0.26; p < 0.001). Transfusion and complication rates for patients on therapy undergoing minimally invasive surgery vs open surgery were not statistically different. CONCLUSIONS Patients on chronic ACT had higher transfusion and overall complication rates compared to patients on no treatment or on chronic aspirin. These findings did not correlate to clinical differences in length of stay or grade 3-5 complications.
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Affiliation(s)
- J P Sfakianos
- Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.
| | - A A Hakimi
- Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - P H Kim
- Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - E C Zabor
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - R Mano
- Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - M Bernstein
- Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - M Karellas
- Division of Urologic Oncology, The Cancer Institute of New Jersey, USA
| | - P Russo
- Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
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Huber GM, Blok HP, Butuceanu C, Gaskell D, Horn T, Mack DJ, Abbott D, Aniol K, Anklin H, Armstrong C, Arrington J, Assamagan K, Avery S, Baker OK, Barrett B, Beise EJ, Bochna C, Boeglin W, Brash EJ, Breuer H, Chang CC, Chant N, Christy ME, Dunne J, Eden T, Ent R, Fenker H, Gibson EF, Gilman R, Gustafsson K, Hinton W, Holt RJ, Jackson H, Jin S, Jones MK, Keppel CE, Kim PH, Kim W, King PM, Klein A, Koltenuk D, Kovaltchouk V, Liang M, Liu J, Lolos GJ, Lung A, Margaziotis DJ, Markowitz P, Matsumura A, McKee D, Meekins D, Mitchell J, Miyoshi T, Mkrtchyan H, Mueller B, Niculescu G, Niculescu I, Okayasu Y, Pentchev L, Perdrisat C, Pitz D, Potterveld D, Punjabi V, Qin LM, Reimer PE, Reinhold J, Roche J, Roos PG, Sarty A, Shin IK, Smith GR, Stepanyan S, Tang LG, Tadevosyan V, Tvaskis V, van der Meer RLJ, Vansyoc K, Van Westrum D, Vidakovic S, Volmer J, Vulcan W, Warren G, Wood SA, Xu C, Yan C, Zhao WX, Zheng X, Zihlmann B. Separated response function ratios in exclusive, forward π(±) electroproduction. Phys Rev Lett 2014; 112:182501. [PMID: 24856691 DOI: 10.1103/physrevlett.112.182501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Indexed: 06/03/2023]
Abstract
The study of exclusive π(±) electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio RL=σL(π-)/σL(π+) is sensitive to isoscalar contamination to the dominant isovector pion exchange amplitude, which is the basis for the determination of the charged pion form factor from electroproduction data. A change in the value of RT=σT(π-)/σT(π+) from unity at small -t, to 1/4 at large -t, would suggest a transition from coupling to a (virtual) pion to coupling to individual quarks. Furthermore, the mentioned ratios may show an earlier approach to perturbative QCD than the individual cross sections. We have performed the first complete separation of the four unpolarized electromagnetic structure functions above the dominant resonances in forward, exclusive π(±) electroproduction on the deuteron at central Q(2) values of 0.6, 1.0, 1.6 GeV(2) at W=1.95 GeV, and Q(2)=2.45 GeV(2) at W=2.22 GeV. Here, we present the L and T cross sections, with emphasis on RL and RT, and compare them with theoretical calculations. Results for the separated ratio RL indicate dominance of the pion-pole diagram at low -t, while results for RT are consistent with a transition between pion knockout and quark knockout mechanisms.
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Affiliation(s)
- G M Huber
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - H P Blok
- VU university, NL-1081 HV Amsterdam, The Netherlands and NIKHEF, Postbus 41882, NL-1009 DB Amsterdam, The Netherlands
| | - C Butuceanu
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - D Gaskell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Horn
- Catholic University of America, Washington, DC 20064, USA
| | - D J Mack
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Abbott
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - K Aniol
- California State University Los Angeles, Los Angeles, California 90032, USA
| | - H Anklin
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Florida International University, Miami, Florida 33119, USA
| | - C Armstrong
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - J Arrington
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - K Assamagan
- Hampton University, Hampton, Virginia 23668, USA
| | - S Avery
- Hampton University, Hampton, Virginia 23668, USA
| | - O K Baker
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Hampton University, Hampton, Virginia 23668, USA
| | - B Barrett
- Saint Mary's University, Halifax, Nova Scotia B3H 3C3 Canada
| | - E J Beise
- University of Maryland, College Park, Maryland 20742, USA
| | - C Bochna
- University of Illinois, Champaign, Illinois 61801, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33119, USA
| | - E J Brash
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - H Breuer
- University of Maryland, College Park, Maryland 20742, USA
| | - C C Chang
- University of Maryland, College Park, Maryland 20742, USA
| | - N Chant
- University of Maryland, College Park, Maryland 20742, USA
| | - M E Christy
- Hampton University, Hampton, Virginia 23668, USA
| | - J Dunne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Eden
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Norfolk State University, Norfolk, Virginia 23504, USA
| | - R Ent
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Fenker
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E F Gibson
- California State University, Sacramento, California 95819, USA
| | - R Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - K Gustafsson
- University of Maryland, College Park, Maryland 20742, USA
| | - W Hinton
- Hampton University, Hampton, Virginia 23668, USA
| | - R J Holt
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - H Jackson
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Jin
- Kyungpook National University, Daegu 702-701, Republic of Korea
| | - M K Jones
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - C E Keppel
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Hampton University, Hampton, Virginia 23668, USA
| | - P H Kim
- Kyungpook National University, Daegu 702-701, Republic of Korea
| | - W Kim
- Kyungpook National University, Daegu 702-701, Republic of Korea
| | - P M King
- University of Maryland, College Park, Maryland 20742, USA
| | - A Klein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - D Koltenuk
- University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - V Kovaltchouk
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - M Liang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Liu
- University of Maryland, College Park, Maryland 20742, USA
| | - G J Lolos
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - A Lung
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D J Margaziotis
- California State University Los Angeles, Los Angeles, California 90032, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33119, USA
| | | | - D McKee
- New Mexico State University, Las Cruces, New Mexico 88003-8001, USA
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Mitchell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - H Mkrtchyan
- A.I. Alikhanyan National Science Laboratory, Yerevan 0036, Armenia
| | - B Mueller
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - G Niculescu
- James Madison University, Harrisonburg, Virginia 22807, USA
| | - I Niculescu
- James Madison University, Harrisonburg, Virginia 22807, USA
| | | | - L Pentchev
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - C Perdrisat
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - D Pitz
- DAPNIA/SPhN, CEA/Saclay, F-91191 Gif-sur-Yvette, France
| | - D Potterveld
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - L M Qin
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - P E Reimer
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Reinhold
- Florida International University, Miami, Florida 33119, USA
| | - J Roche
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P G Roos
- University of Maryland, College Park, Maryland 20742, USA
| | - A Sarty
- Saint Mary's University, Halifax, Nova Scotia B3H 3C3 Canada
| | - I K Shin
- Kyungpook National University, Daegu 702-701, Republic of Korea
| | - G R Smith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Stepanyan
- A.I. Alikhanyan National Science Laboratory, Yerevan 0036, Armenia
| | - L G Tang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Hampton University, Hampton, Virginia 23668, USA
| | - V Tadevosyan
- A.I. Alikhanyan National Science Laboratory, Yerevan 0036, Armenia
| | - V Tvaskis
- VU university, NL-1081 HV Amsterdam, The Netherlands and NIKHEF, Postbus 41882, NL-1009 DB Amsterdam, The Netherlands
| | | | - K Vansyoc
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - D Van Westrum
- University of Colorado, Boulder, Colorado 80309, USA
| | - S Vidakovic
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - J Volmer
- VU university, NL-1081 HV Amsterdam, The Netherlands and DESY, Hamburg, Germany
| | - W Vulcan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - G Warren
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S A Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Xu
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - C Yan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - W-X Zhao
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - X Zheng
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - B Zihlmann
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and University of Virginia, Charlottesville, Virginia 22901, USA
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Singh R, Kim WJ, Kim PH, Hong HJ. Combined blockade of HER2 and VEGF exerts greater growth inhibition of HER2-overexpressing gastric cancer xenografts than individual blockade. Exp Mol Med 2013; 45:e52. [PMID: 24176949 PMCID: PMC3849567 DOI: 10.1038/emm.2013.111] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 08/07/2013] [Accepted: 08/09/2013] [Indexed: 12/14/2022] Open
Abstract
Gastric cancer overexpressing the human epidermal growth factor 2 (HER2) protein has a poor outcome, although a combination of chemotherapy and the anti-HER2 antibody trastuzumab has been approved for the treatment of advanced gastric cancer. Vascular endothelial growth factor (VEGF) expression in gastric cancer is correlated with recurrence and poor prognosis; however, the anti-VEGF antibody bevacizumab has shown limited efficacy against gastric cancer in clinical trials. In this study, we evaluated the antitumor effects of trastuzumab; VEGF-Trap binding to VEGF-A, VEGF-B and placental growth factor (PlGF); and a combination of trastuzumab and VEGF-Trap in a gastric cancer xenograft model. Although trastuzumab and VEGF-Trap each moderately inhibited tumor growth, the combination of these agents exerted greater inhibition compared with either agent alone. Immunohistochemical analyses indicated that the reduction in tumor growth was associated with decreased proliferation and increased apoptosis of tumor cells and decreased tumor vascular density. The combined treatment resulted in fewer proliferating tumor cells, more apoptotic cells and reduced tumor vascular density compared with treatment with trastuzumab or VEGF-Trap alone, indicating that trastuzumab and VEGF-Trap had additive inhibitory effects on the tumor growth and angiogenesis of the gastric cancer xenografts. These data suggest that trastuzumab in combination with VEGF-Trap may represent an effective approach to treating HER2-overexpressing gastric cancer.
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Affiliation(s)
- Rohit Singh
- 1] Department of Molecular Bioscience, College of Biomedical Science, Kangwon National University, Chuncheon, Korea [2] Institute of Antibody Research, Kangwon National University, Chuncheon, Korea
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Moon MY, Kim HJ, Kim JG, Lee JY, Kim J, Kim SC, Choi IG, Kim PH, Park JB. Small GTPase Rap1 regulates cell migration through regulation of small GTPase RhoA activity in response to transforming growth factor-β1. J Cell Physiol 2013; 228:2119-26. [PMID: 23559363 DOI: 10.1002/jcp.24383] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 03/21/2013] [Indexed: 01/24/2023]
Abstract
Transforming growth factor (TGF)-β1 regulates diverse cellular functions. Particularly, TGF-β1 induces monocyte migration to sites of injury or inflammation in early period, whereas TGF-β1 inhibits cell migration in late phase. In this study, we attempted to understand how TGF-β1 suppresses cell migration in late phase. We found that TGF-β1 of short exposure induces the production of chemokines, such as macrophage inflammatory protein (MIP)-1α, by Raw 264.7 cells. However, knock-down of small GTPase RhoA by sh-RhoA inhibited the production of MIP-1α and macrophage migration, suggesting that RhoA is essential for expression of this chemokine. An activator of Epac (exchange proteins directly activated by cAMP; a guanine nucleotide exchange factor of Rap1), 8CPT-2Me-cAMP which leads to Rap1 activation abrogated MIP-1α expression and macrophage migration. Indeed, GTP-RhoA and GTP-Rap1 levels were reciprocally regulated in a time-dependent manner following TGF-β1 stimulation. 8CPT-2Me-cAMP suppressed GTP-RhoA levels, whereas si-Rap1 augmented GTP-RhoA levels and cell migration. TGF-β1 produced cAMP in late period and si-RNAs of Epac1 and Epac2 reduced GTP-Rap1 levels leading to promotion of GTP-RhoA levels. Furthermore, si-RNA of ARAP3 (Rap-dependent RhoGAP) increased GTP-RhoA level and cell migration. Therefore, we propose the mechanism that prolonged TGF-β1 treatment produce cAMP, which activates sequentially Epac, Rap1 and ARAP3, resulting in suppression of RhoA, chemokine expression, and macrophage migration. Contrary to the general concept that Rap1 stimulates cell migration, we demonstrated in this study that Rap1 inhibits cell migration by suppression of RhoA activity in response to TGF-β1.
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Affiliation(s)
- Mi-Young Moon
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Kangwon-Do, Republic of Korea
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Gallagher DJ, Vijai J, Hamilton RJ, Ostrovnaya I, Iyer G, Garcia-Grossman IR, Kim PH, Przybylo JA, Alanee S, Riches JC, Regazzi AM, Milowsky MI, Offit K, Bajorin DF. Germline single nucleotide polymorphisms associated with response of urothelial carcinoma to platinum-based therapy: the role of the host. Ann Oncol 2013; 24:2414-21. [PMID: 23897706 DOI: 10.1093/annonc/mdt225] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Variations in urothelial carcinoma (UC) response to platinum chemotherapy are common and frequently attributed to genetic and epigenetic variations of somatic DNA. We hypothesized that variations in germline DNA may contribute to UC chemosensitivity. PATIENTS AND METHODS DNA from 210 UC patients treated with platinum-based chemotherapy was genotyped for 80 single nucleotide polymorphisms (SNPs). Logistic regression was used to examine the association between SNPs and response, and a multivariable predictive model was created. Significant SNPs were combined to form a SNP score predicting response. Eleven UC cell lines were genotyped as validation. RESULTS Six SNPs were significantly associated with 101 complete or partial responses (48%). Four SNPs retained independence association and were incorporated into a response prediction model. Each additional risk allele was associated with a nearly 50% decrease in odds of response [odds ratio (OR) = 0.51, 95% confidence interval 0.39-0.65, P = 1.05 × 10(-7)). The bootstrap-adjusted area under the curves of this model was greater than clinical prognostic factors alone (0.78 versus 0.64). The SNP score showed a positive trend with chemosensitivity in cell lines (P = 0.115). CONCLUSIONS Genetic variants associated with response of UC to platinum-based therapy were identified in germline DNA. A model using these genetic variants may predict response to chemotherapy better than clinical factors alone.
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Affiliation(s)
- D J Gallagher
- Department of Medical Oncology and Cancer Genetics, Mater Hospital and St. James's Hospital, Dublin 7, Ireland.
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Seo GY, Jang YS, Kim HA, Lee MR, Park MH, Park SR, Lee JM, Choe J, Kim PH. Retinoic acid, acting as a highly specific IgA isotype switch factor, cooperates with TGF-β1 to enhance the overall IgA response. J Leukoc Biol 2013; 94:325-35. [PMID: 23744644 DOI: 10.1189/jlb.0313128] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The present study demonstrates that RA has activity of an IgA switch factor and is more specific than TGF-β1. RA independently caused only IgA switching, whereas TGF-β1 caused IgA and IgG2b switching. We found that RA increased IgA production and that this was a result of its ability to increase the frequency of IgA-secreting B cell clones. Increased IgA production was accompanied by an increase of GLTα. RA activity was abrogated by an antagonist of the RAR. Additionally, RA affected intestinal IgA production in mice. Surprisingly, RA, in combination with TGF-β1, notably enhanced not only IgA production and GLTα expression but also CCR9 and α4β7 expression on B cells. These results suggest that RA selectively induces IgA isotype switching through RAR and that RA and TGF-β have important effects on the overall gut IgA antibody response.
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Affiliation(s)
- Goo-Young Seo
- School of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701, Korea
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