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Evaluating the Protective Properties of a Xyloglucan-Based Nasal Spray in a Mouse Model of Allergic Rhinitis. Int J Mol Sci 2021; 22:ijms221910472. [PMID: 34638811 PMCID: PMC8508723 DOI: 10.3390/ijms221910472] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/15/2021] [Accepted: 09/24/2021] [Indexed: 12/19/2022] Open
Abstract
A breached nasal epithelial barrier plays an important role in driving allergic rhinitis (AR). Corticosteroids remain the standard of care (SoC) but come with side effects, thus alternative safe and effective treatments able to avoid inflammation and restore barrier integrity are needed. The aim of the present study is to evaluate the barrier-forming capacity of a xyloglucan-based nasal spray (XG) and compare its efficacy to several SoC treatments (corticosteroid spray, oral mast-cell stabilizer and oral antihistamine) in reducing allergic responses in addition to its effect when concomitantly administered with an antihistamine. An ovalbumin (OVA)-induced mouse AR model was used. XG shows a significant efficacy in reducing histological damage in AR mice; improves nasal rubbing and histamine-induced hyper-responsiveness. Total and OVA-specific IgE as well as pro-inflammatory cytokines are significantly reduced compared to OVA challenged-mice, with im-proved efficacy when used as an add-on treatment. However, XG reduces mucous secreting cells (PAS-positive) and mucin mRNA expression similar to the corticosteroid-treated mice. XG-spray maintains tight junction protein expression (ZO-1) and conversely decreases HDAC1 significantly; the latter being highly expressed in AR patients. Moreover, the concomitant treatment showed in all of the endpoints a similar efficacy to the corticosteroids. This innovative approach may represent a novel therapeutic strategy for nasal respiratory diseases like AR, reducing undesirable side effects and improving the quality of life in patients.
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Plasminogen kringle 5 suppresses gastric cancer via regulating HIF-1α and GRP78. Cell Death Dis 2017; 8:e3144. [PMID: 29072683 PMCID: PMC5682690 DOI: 10.1038/cddis.2017.528] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 07/13/2017] [Accepted: 07/14/2017] [Indexed: 01/26/2023]
Abstract
Inhibition of tumour angiogenesis has an important role in antitumour therapy. However, a recent study indicates that antiangiogenesis therapy may lead to glucose-related protein 78 (GRP78) associated antiapoptotic resistance. The present study aims to elucidate the dual effects of plasminogen kringle 5 (K5) on tumour angiogenesis and apoptosis induction by targeting hypoxia-inducible factor 1α (HIF-1α) and GRP78. Co-immunoprecipitation and western blotting were used for examining the ubiquitination of HIF-1α and analysing angiogenesis and apoptosis-associated proteins. K5 promoted the sumo/ubiquitin-mediated proteasomal degradation of HIF-1α by upregulating von Hippel-Lindau protein under hypoxia, resulting in the reduction of vascular endothelial growth factor and thus suppressing tumour angiogenesis. Furthermore, K5 decreased GRP78 expression via downregulation of phosphorylated extracellular-regulated protein kinase, leading to caspase-7 cleavage and tumour cell apoptosis. Blocking voltage-dependent anion channel abrogated the effects of K5 on both HIF-1α and GRP78. K5 significantly inhibited the growth of gastric carcinoma xenografts by inhibiting both angiogenesis and apoptosis. The dual effects suggest that K5 might be a promising bio-therapeutic agent in the treatment of gastric cancer, particularly in patients who exhibit the induction of GRP78.
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Immune Regulation and Antitumor Effect of TIM-1. J Immunol Res 2016; 2016:8605134. [PMID: 27413764 PMCID: PMC4931049 DOI: 10.1155/2016/8605134] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/10/2016] [Accepted: 04/28/2016] [Indexed: 01/25/2023] Open
Abstract
T cells play an important role in antitumor immunity, and the T cell immunoglobulin domain and the mucin domain protein-1 (TIM-1) on its surface, as a costimulatory molecule, has a strong regulatory effect on T cells. TIM-1 can regulate and enhance type 1 immune response of tumor association. Therefore, TIM-1 costimulatory pathways may be a promising therapeutic target in future tumor immunotherapy. This review describes the immune regulation and antitumor effect of TIM-1.
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Qi W, Yang C, Dai Z, Che D, Feng J, Mao Y, Cheng R, Wang Z, He X, Zhou T, Gu X, Yan L, Yang X, Ma JX, Gao G. High levels of pigment epithelium-derived factor in diabetes impair wound healing through suppression of Wnt signaling. Diabetes 2015; 64:1407-19. [PMID: 25368097 DOI: 10.2337/db14-1111] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Diabetic foot ulcer (DFU) caused by impaired wound healing is a common vascular complication of diabetes. The current study revealed that plasma levels of pigment epithelium-derived factor (PEDF) were elevated in type 2 diabetic patients with DFU and in db/db mice. To test whether elevated PEDF levels contribute to skin wound-healing delay in diabetes, endogenous PEDF was neutralized with an anti-PEDF antibody in db/db mice. Our results showed that neutralization of PEDF accelerated wound healing, increased angiogenesis in the wound skin, and improved the functions and numbers of endothelial progenitor cells (EPCs) in the diabetic mice. Further, PEDF-deficient mice showed higher baseline blood flow in the skin, higher density of cutaneous microvessels, increased skin thickness, improved numbers and functions of circulating EPCs, and accelerated wound healing compared with wild-type mice. Overexpression of PEDF suppressed the Wnt signaling pathway in the wound skin. Lithium chloride-induced Wnt signaling activation downstream of the PEDF interaction site attenuated the inhibitory effect of PEDF on EPCs and rescued the wound-healing deficiency in diabetic mice. Taken together, these results suggest that elevated circulating PEDF levels contribute to impaired wound healing in the process of angiogenesis and vasculogenesis through the inhibition of Wnt/β-catenin signaling.
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Affiliation(s)
- Weiwei Qi
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Chuan Yang
- Department of Endocrinology, Second Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Zhiyu Dai
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Di Che
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Juan Feng
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Yuling Mao
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Rui Cheng
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Zhongxiao Wang
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Xuemin He
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Ti Zhou
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Xiaoqiong Gu
- Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Li Yan
- Department of Endocrinology, Second Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Xia Yang
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China China Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Ministry of Education, Guangzhou, People's Republic of China
| | - Jian-Xing Ma
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Guoquan Gao
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, People's Republic of China Key Laboratory of Functional Molecules from Marine Microorganisms (Sun Yat-Sen University), Department of Education of Guangdong Province, Guangzhou, People's Republic of China
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Li L, Yao YC, Gu XQ, Che D, Ma CQ, Dai ZY, Li C, Zhou T, Cai WB, Yang ZH, Yang X, Gao GQ. Plasminogen kringle 5 induces endothelial cell apoptosis by triggering a voltage-dependent anion channel 1 (VDAC1) positive feedback loop. J Biol Chem 2014; 289:32628-38. [PMID: 25296756 DOI: 10.1074/jbc.m114.567792] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human plasminogen kringle 5 (K5) is known to display its potent anti-angiogenesis effect through inducing endothelial cell (EC) apoptosis, and the voltage-dependent anion channel 1 (VDAC1) has been identified as a receptor of K5. However, the exact role and underlying mechanisms of VDAC1 in K5-induced EC apoptosis remain elusive. In the current study, we showed that K5 increased the protein level of VDAC1, which initiated the mitochondrial apoptosis pathway of ECs. Our findings also showed that K5 inhibited the ubiquitin-dependent degradation of VDAC1 by promoting the phosphorylation of VDAC1, possibly at Ser-12 and Thr-107. The phosphorylated VDAC1 was attenuated by the AKT agonist, glycogen synthase kinase (GSK) 3β inhibitor, and siRNA, suggesting that K5 increased VDAC1 phosphorylation via the AKT-GSK3β pathway. Furthermore, K5 promoted cell surface translocation of VDAC1, and binding between K5 and VDAC1 was observed on the plasma membrane. HKI protein blocked the impact of K5 on the AKT-GSK3β pathway by competitively inhibiting the interaction of K5 and cell surface VDAC1. Moreover, K5-induced EC apoptosis was suppressed by VDAC1 antibody. These data show for the first time that K5-induced EC apoptosis is mediated by the positive feedback loop of "VDAC1-AKT-GSK3β-VDAC1," which may provide new perspectives on the mechanisms of K5-induced apoptosis.
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Affiliation(s)
- Lei Li
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, the Department of Reproductive Medicine Center, Key Laboratory for Reproductive Medicine of Guangdong Province, Third Affiliated Hospital of Guangzhou Medical University, 63 Duobao Road, Guangzhou 510150
| | - Ya-Chao Yao
- the Laboratory Center of Guangdong NO.2 Provincial People's Hospital, Guangzhou 510317
| | - Xiao-Qiong Gu
- the Department of Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou 510623
| | - Di Che
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080
| | - Cai-Qi Ma
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080
| | - Zhi-Yu Dai
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080
| | - Cen Li
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080
| | - Ti Zhou
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080
| | - Wei-Bin Cai
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080
| | - Zhong-Han Yang
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080
| | - Xia Yang
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, the China Key Laboratory of Tropical Disease Control, Sun Yat-sen University, Ministry of Education, Guangzhou 510080, and
| | - Guo-Quan Gao
- From the Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, the Key Laboratory of Functional Molecules from Marine Microorganisms, Sun Yat-sen University, Department of Education of Guangdong Province, Guangzhou 510080, China
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Li L, Yao YC, Fang SH, Ma CQ, Cen Y, Xu ZM, Dai ZY, Li C, Li S, Zhang T, Hong HH, Qi WW, Zhou T, Li CY, Yang X, Gao GQ. Pigment epithelial-derived factor (PEDF)-triggered lung cancer cell apoptosis relies on p53 protein-driven Fas ligand (Fas-L) up-regulation and Fas protein cell surface translocation. J Biol Chem 2014; 289:30785-30799. [PMID: 25225287 DOI: 10.1074/jbc.m114.590000] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Pigment epithelium-derived factor (PEDF), a potent antiangiogenesis agent, has recently attracted attention for targeting tumor cells in several types of tumors. However, less is known about the apoptosis-inducing effect of PEDF on human lung cancer cells and the underlying molecular events. Here we report that PEDF has a growth-suppressive and proapoptotic effect on lung cancer xenografts. Accordingly, in vitro, PEDF apparently induced apoptosis in A549 and Calu-3 cells, predominantly via the Fas-L/Fas death signaling pathway. Interestingly, A549 and Calu-3 cells are insensitive to the Fas-L/Fas apoptosis pathway because of the low level of cell surface Fas. Our results revealed that, in addition to the enhancement of Fas-L expression, PEDF increased the sensitivity of A549 and Calu-3 cells to Fas-L-mediated apoptosis by triggering the translocation of Fas protein to the plasma membrane in a p53- and FAP-1-dependent manner. Similarly, the up-regulation of Fas-L by PEDF was also mediated by p53. Furthermore, peroxisome proliferator-activated receptor γ was determined to be the upstream regulator of p53. Together, these findings uncover a novel mechanism of tumor cell apoptosis induced by PEDF and provide a potential therapeutic strategy for tumors that are insensitive to Fas-L/Fas-dependent apoptosis because of a low level of cell surface Fas.
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Affiliation(s)
- Lei Li
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China,; Department of Reproductive Medicine Center, Key Laboratory for Reproductive Medicine of Guangdong Province, Third Affiliated Hospital of Guangzhou Medical University, 63 Duobao Road, Guangzhou 510150, China
| | - Ya-Chao Yao
- Laboratory Center of Guangdong No. 2 Provincial People's Hospital, Guangzhou 510317, Guangdong Province, China
| | - Shu-Huan Fang
- DME Center, Clinical Pharmacology Institute, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Cai-Qi Ma
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Yi Cen
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Zu-Min Xu
- Cancer Center, Affiliated Hospital of Guangdong Medical College, Zhanjiang 524000, China
| | - Zhi-Yu Dai
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Cen Li
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Shuai Li
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Ting Zhang
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Hong-Hai Hong
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Wei-Wei Qi
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Ti Zhou
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Chao-Yang Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China,.
| | - Xia Yang
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China,; China Key Laboratory of Tropical Disease Control, Sun Yat-sen University, Ministry of Education, Guangzhou 510080, China, and.
| | - Guo-Quan Gao
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China,; Key Laboratory of Functional Molecules from Marine Microorganisms, Sun Yat-sen University, Department of Education of Guangdong Province, Guangdong 510080, China.
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Ko MT, Huang SC, Kang HY. Establishment and characterization of an experimental mouse model of allergic rhinitis. Eur Arch Otorhinolaryngol 2014; 272:1149-55. [PMID: 25027946 DOI: 10.1007/s00405-014-3176-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 06/19/2014] [Indexed: 11/29/2022]
Abstract
Allergic rhinitis (AR) is a common worldwide disease. Animal studies on AR were adopted in various investigations. However, animal studies simply aimed at establishing an animal model for AR have been seldom seen. The purpose of this study was to introduce an easy-to-establish experimental mouse model of AR. To develop a mouse model of AR, 38 Balb/c mice were randomly assigned to two groups. Mice in the study group were sensitized by intraperitoneal (IP) injection of ovalbumin (OVA) on day 1 and 6, followed by continuous inhalation (IH) of OVA solution for 1 week (day 8-14) using a newly designed inhalation box. The control group mice received sensitization of IP normal saline and IH sterilized distilled water instead of OVA. Before and after sensitization, the frequencies of nasal symptoms (sneezing, nasal rubbing) were recorded and the serum levels of total immunoglobulin E (IgE) were evaluated using ELISA. Finally, the murine nasal mucosal tissues were stained by Giemsa solution to estimate the degree of mast cell infiltration. After sensitization by IP and IH OVA, the study group showed significant phenotypic changes including increased sneezing and rubbing. Pathological and cytological findings also confirmed significant elevated serum total IgE titer and local mast cell infiltration in the study group statistically. We successfully developed a workable experimental animal model for AR that was more easily sensitized using our new-designed inhalation box, with less stress and more precisely to be observed.
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Affiliation(s)
- Ming-Tse Ko
- Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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Lin Z, Zhou L, Luo X, Xia W, Chen D, Xu R, Wang J, Luo R, Xu G, Li H. Suppression of TIM-1 predicates clinical efficacy of sublingual immunotherapy for allergic rhinitis in children. Int J Pediatr Otorhinolaryngol 2013; 77:1345-9. [PMID: 23800473 DOI: 10.1016/j.ijporl.2013.05.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 05/07/2013] [Accepted: 05/24/2013] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To evaluate the clinical efficacy of sublingual immunotherapy (SLIT) with house-dust mite (HDM) extract and to examine the change of biomarkers (TIM-1, IL-5 and IL-10) after 6-month SLIT in children with allergic rhinitis (AR). METHODS One hundred and sixteen HDM-sensitized children with persistent AR were enrolled to assess the clinical efficacy of SLIT by determining the individual nasal symptom score (INSS) and total nasal symptom scores (TNSS) after 6-month SLIT. Moreover, the mRNA expression of TIM-1, IL-5 and IL-10 in peripheral blood mononuclear cells (PBMCs) was examined in 16 well-controlled and 12 uncontrolled AR patients using quantitative reverse transcription polymerase chain reaction (qRT-PCR). RESULTS After 6-month SLIT, both TNSS and INSS scores were significantly decreased compared with the baseline value (p < 0.01). The rates for well-controlled, partly controlled and uncontrolled children were 43.1%, 32.8% and 24.1%, respectively. Accordingly, the mRNA levels of TIM-1 and IL-5 decreased significantly and IL-10 mRNA level increased significantly compared with the baseline value in well-controlled children (p < 0.05). CONCLUSION Our findings suggest SLIT with HDM extract is effective and safe for AR children and TIM-1 may be considered as an indicator for evaluating the clinical efficacy of SLIT.
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Affiliation(s)
- Zhibin Lin
- Department of Otolaryngology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Shin JH, Kim BY, Park HR, Kim SW, Kim SW. The effect of pneumococcal polysaccharide vaccine in a mouse model of allergic rhinitis. Otolaryngol Head Neck Surg 2013; 148:383-90. [PMID: 23314157 DOI: 10.1177/0194599812472864] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES This study aimed to determine if pneumococcal polysaccharide vaccine (PPV) could suppress allergic inflammation in an allergic rhinitis mouse model and to explore whether differences exist regarding the effect of PPV according to timing of administration. STUDY DESIGN In vivo study using an animal model. SETTING Catholic Research Institutes of Medical Science. SUBJECTS AND METHODS BALB/c mice were divided into control, Der f, Pre-S, and Post-S groups. The allergen was Dermatophagoides farinae (Der f). Pneumococcal polysaccharide vaccine was administered before (Pre-S) or after (Post-S) sensitization. Allergic symptoms and eosinophils in nasal mucosa, interferon-γ, interleukin (IL)-13, and IL-10 in nasal lavage fluid and serum Der f-specific IgE were measured. T-bet, GATA-3, and Foxp3 mRNA in spleen were determined by real-time polymerase chain reaction. Flow cytometry of CD4(+)CD25(+)Foxp3(+) T cells in spleen was analyzed. RESULTS In the Pre-S group, symptom score, serum Der f-specific IgE, eosinophils, IL-13, and GATA-3 mRNA were decreased (P < .05), and IL-10, Foxp3 mRNA, and CD4(+)CD25(+)Foxp3(+) T cells were increased compared with those in Der f group (P < .05). In the Post-S group, symptom score, serum Der f-specific IgE, and GATA-3 mRNA were decreased (P < .05), and Foxp3 mRNA and CD4(+)CD25(+)Foxp3(+) T cells were increased compared with those in the Der f group (P < .05). CONCLUSION These results suggest that PPV administered before or after sensitization suppresses Th2 response and enhanced induction of regulatory T cells in an allergic rhinitis model. In addition, there was no significant difference between the degrees of effects in these 2 conditions. In the future, we can consider PPV to be a preventative agent for allergic rhinitis.
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Affiliation(s)
- Ji-Hyeon Shin
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
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Shin JH, Kim SW, Park YS. Role of NOD1-mediated signals in a mouse model of allergic rhinitis. Otolaryngol Head Neck Surg 2012; 147:1020-6. [PMID: 23032918 DOI: 10.1177/0194599812461999] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The purpose of the present study was to investigate the effect of nucleotide-binding oligomerization domain 1 (NOD1), an innate immune sensor, on allergic inflammation and induction of regulatory T cells in a mouse model of allergic rhinitis. We also aimed to explore whether there were differences in the effect of NOD1 ligand according to the timing of administration. Study Design An in vivo study using an animal model. SETTING Catholic Research Institutes of Medical Science. SUBJECTS AND METHODS Forty BALB/c mice were divided into 4 groups: control, OVA, pre-NOD1, and post-NOD1. Ovalbumin (OVA) was used for sensitization and challenge. The pre-NOD1 group received NOD1 ligand intranasally before sensitization, whereas the post-NOD1 group received it after sensitization. The effects of allergic inflammation and regulatory T cells were compared among the groups. RESULTS In the post-NOD1 group, serum OVA-specific IgE, eosinophil counts, interleukin (IL)-13 levels, and GATA-3 mRNA expression were significantly increased and Foxp3(+) mRNA expression and CD4(+) Foxp3(+) T cells were decreased compared with the OVA group. In the pre-NOD1 group, Foxp3 mRNA expression and CD4(+) Foxp3(+) T cells were significantly decreased compared with the OVA group. Although not significant, the pre-NOD1 group showed increases in serum OVA-specific IgE, eosinophil counts, IL-13 levels, and GATA-3 mRNA expression compared with the OVA group. CONCLUSION The innate immune response through NOD1 enhances allergen-specific Th2 response and suppresses induction of regulatory T cells in a mouse model of allergic rhinitis, and the effects are different depending on the timing of exposure to NOD1 ligand.
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Affiliation(s)
- Ji-Hyeon Shin
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
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