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Zhang L, Chen W, Li Y, Hong W, Li H, Cui Z, Dong X, Han X, Bao G, Xiao L, Gao P, Wang Y. Correction to: Effect of 650-nm low-level laser irradiation on c-Jun, c-Fos, ICAM-1, and CCL2 expression in experimental periodontitis. Lasers Med Sci 2019; 35:41. [PMID: 31823136 DOI: 10.1007/s10103-019-02902-5] [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] [Indexed: 10/25/2022] [Imported: 09/13/2023]
Abstract
After publication of our article [1] we realized that we had not acknowledged that some of the text overlaps with a previous publication [2]. We apologize to readers for this error.
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Affiliation(s)
- Lin Zhang
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, 12 Qi Xiang Tai Street, Heping District, Tianjin, 300070, China
| | - Wenlei Chen
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, 12 Qi Xiang Tai Street, Heping District, Tianjin, 300070, China
| | - Yingxin Li
- Institute of Biomedical Engineering, Academy of Medical Science and Peking Union Medical College, Tianjin, China
| | - Wei Hong
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Haidong Li
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Zhuang Cui
- School of Public Health, Tianjin Medical University, Tianjin, China
| | - Xiaoxi Dong
- Institute of Biomedical Engineering, Academy of Medical Science and Peking Union Medical College, Tianjin, China
| | - Xiaohui Han
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Gang Bao
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, 12 Qi Xiang Tai Street, Heping District, Tianjin, 300070, China
| | - Li Xiao
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, 12 Qi Xiang Tai Street, Heping District, Tianjin, 300070, China
| | - Pengfei Gao
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, 12 Qi Xiang Tai Street, Heping District, Tianjin, 300070, China
| | - Yonglan Wang
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, 12 Qi Xiang Tai Street, Heping District, Tianjin, 300070, China.
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Zhang L, Chen W, Li Y, Hong W, Li H, Cui Z, Dong X, Han X, Bao G, Xiao L, Gao P, Wang Y. Effect of 650-nm low-level laser irradiation on c-Jun, c-Fos, ICAM-1, and CCL2 expression in experimental periodontitis. Lasers Med Sci 2020; 35:31-40. [PMID: 30341668 DOI: 10.1007/s10103-018-2662-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 10/09/2018] [Indexed: 02/05/2023] [Imported: 09/13/2023]
Abstract
This study was designed to investigate the effect of 650-nm low-level laser irradiation (LLLI) as an adjunctive treatment of experimental periodontitis. To investigate possible LLLI-mediated anti-inflammatory effects, we utilized an experimental periodontitis (EP) rat model and analyzed c-Jun, c-Fos, ICAM-1, and CCL2 gene expressions on PB leukocytes and in the gingival tissue. Total RNA was isolated from the gingivae and peripheral blood (PB) leukocytes of normal, EP, scaling, and root planing (SRP)-treated EP and LLLI + SRP-treated EP rats, and gene expressions were analyzed by real-time PCR. The productions of c-Jun, c-Fos, ICAM-1, and CCL2 in gingivae were analyzed immunohistochemically. Tartrate-resistant acid phosphatase (TRAP) staining was used to determine osteoclast activity in alveolar bone. The c-Jun and ICAM-1 messenger RNA (mRNA) levels were significantly decreased in the EP rat gingival tissue treated by SRP + LLLI than by SRP, the c-Jun, ICAM-1, and c-Fos mRNA levels on PB leukocytes reduced after LLLI treatment but did not show any significant differences in both groups. There was no significant difference in CCL2 mRNA levels on PB leukocytes and in gingivae between the SRP + LLLI and the SRP groups. The c-Fos mRNA levels in gingivae did not show significant difference in both groups. Immunohistochemistry showed that the CCL2, ICAM-1, c-Jun, and c-Fos productions were significantly reduced in rats of the SRP + LLLI group compared with the only SRP group. LLLI significantly decreased the number of osteoclasts as demonstrated by TRAP staining. The 650-nm LLLI might be a useful treatment modality for periodontitis.
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Tian Z, Liu J, Liao M, Li W, Zou J, Han X, Kuang M, Shen W, Li H. Beneficial Effects of Fecal Microbiota Transplantation on Ulcerative Colitis in Mice. Dig Dis Sci 2016; 61:2262-2271. [PMID: 26846120 DOI: 10.1007/s10620-016-4060-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 01/26/2016] [Indexed: 12/12/2022] [Imported: 08/29/2023]
Abstract
BACKGROUND Ulcerative colitis (UC) is a chronic condition and the most common form of inflammatory bowel disease. The goal of standard treatment is mainly to induce and maintain remission with anti-inflammatory, immunosuppressive agents, and/or colectomy. Fecal microbiota transplantation (FMT) has been used successfully to treat relapsing or refractory Clostridium difficile infection. The alteration of microbiota in mouse models of UC as well as in patients suggested the possibility of treating UC with FMT. AIMS To study the effects of FMT on dextran sodium sulfate (DSS)-induced UC model in mice. METHODS Littermates of BALB/c and C57BL/6J were randomized into four groups: normal control , treatment with DSS for 7 days (DSS - FMT), treatment with DSS followed by FMT for another 8 days (DSS + FMT), and treatment with DSS and FMT followed by another 5 days for recovery (remission). Body weight, survival rate, and DAI scores of mice in each group were recorded. Changes in distal colon were studied by histopathology. Alterations of spleen and lamina propria regulatory lymphocytes, major bacterial species in feces and inflammatory cytokines in colon were also studied. RESULTS C57BL/6J mice experienced more significant weight loss than BALB/c mice after DSS treatment, regardless of whether the two strains of mice were co-housed or not. FMT caused reversal of DAI scores in BALB/c but not in C57BL/6J mice. In BALB/c mice, FMT also reduced colon inflammation that was paralleled by decreased inflammatory cytokine levels, altered bacterial microbiota, and regulatory lymphocyte proportions. CONCLUSIONS FMT is effective in a mouse model of UC through its modulation on gut microbiota and the host immune system.
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Affiliation(s)
- Zhihui Tian
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Jie Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Mengyu Liao
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Wenjuan Li
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Jiaqi Zou
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Xinxin Han
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Mingjie Kuang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Wanqiu Shen
- Department of Chemical Biology, School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
| | - Haidong Li
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China.
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Li J, Li HD, Zhang Y, Zhang J. Qa-2 associated lipid rafts are indispensable in the final maturation of CD4+CD8− thymocytes. Immunol Lett 2012; 148:163-71. [PMID: 23085604 DOI: 10.1016/j.imlet.2012.10.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 09/21/2012] [Accepted: 10/09/2012] [Indexed: 11/26/2022] [Imported: 09/13/2023]
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Zhao XL, Li HD, Guo YQ, Wang LY, Cao Y, Yu GY, Zhang YJ. [Effect of dantrolene on energy metabolism in rats with myocardial ischemia-reperfusion]. Zhonghua Yi Xue Za Zhi 2011; 91:117-120. [PMID: 21418995 DOI: 10.3760/cma.j.issn.0376-2491.2011.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/13/2023] [Imported: 09/13/2023]
Abstract
OBJECTIVE To investigate the effect of dantrolene on energy metabolism in rats with myocardial ischemia-reperfusion. METHODS Forty-eight male rats were randomly divided into 3 groups: control group, ischemia-reperfusion group and dantrolene treatment group. With a Langendorff model system, the hearts were perfused with Krebs buffer for 30 min as pre-ischemia control. For ischemia-reperfusion, the hearts were subjected to global ischemia for 30 min and reperfusion for 60 min. The dantrolene treatment group was perfused in the presence of 5 µmol/L dantrolene before ischemia. Tetrazolium chloride (TTC) staining, lactate dehydrogenase (LDH) release and hemodynamics were used to evaluate the tissue injuries. The effect of dantrolene on energy metabolism was evaluated by measuring the quantity of high-energy phosphates and the activity of 2 enzymes in purine salvage synthesis: hypoxanthine-guanine phosphoribosyl transferase (HGPRT) and adenine phosphoribosyl transferase (APRT) by high-performance liquid chromatography (HPLC). RESULTS The myocardial infarct size and LDH release in dantrolene treatment group were lower than those of ischemia-reperfusion hearts [22.1% vs 25.3%, (70 ± 6) U/g vs (116 ± 10) U/g, both P < 0.05]. Dantrolene had no effect on the hemodynamics, except for a slight increase in coronary flow. The hearts receiving dantrolene showed a significantly higher levels of high-energy phosphates and a lower activity of HGPRT and APRT than those in the ischemia-reperfusion group [(7.63 ± 0.72) nmol×mg(-1)×min(-1) vs (12.42 ± 1.12) nmol×mg(-1)×min(-1), (4.14 ± 0.22) nmol×mg(-1)min(-1) vs (4.57 ± 0.39) nmol×mg(-1)×min(-1), both P < 0.05]. CONCLUSION Dantrolene is cardioprotective for ischemia-reperfusion injury through reducing infarct size and improving energy metabolism.
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Affiliation(s)
- Xiao-Li Zhao
- Department of Biochemistry, Tianjin Medical University, Tianjin 300070, China
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Fang F, Li H, Liu Y, Zhang Y, Tao Y, Li Y, Cao H, Wang S, Wang L, Zhang X. Active immunization with recombinant GnRH fusion protein in boars reduces both testicular development and mRNA expression levels of GnRH receptor in pituitary. Anim Reprod Sci 2010; 119:275-81. [PMID: 20129744 DOI: 10.1016/j.anireprosci.2010.01.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Revised: 12/18/2009] [Accepted: 01/08/2010] [Indexed: 11/25/2022] [Imported: 09/13/2023]
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Polyak MJ, Li H, Shariat N, Deans JP. CD20 homo-oligomers physically associate with the B cell antigen receptor. Dissociation upon receptor engagement and recruitment of phosphoproteins and calmodulin-binding proteins. J Biol Chem 2008; 283:18545-52. [PMID: 18474602 DOI: 10.1074/jbc.m800784200] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] [Imported: 09/13/2023] Open
Abstract
B cell antigen receptor (BCR) signaling initiates sustained cellular calcium influx necessary for the development, differentiation, and activation of B lymphocytes. CD20 is a B cell-restricted tetraspanning protein organized in the plasma membrane as multimeric molecular complexes involved in BCR-activated calcium entry. Using coprecipitation of native CD20 with tagged or truncated forms of the molecule, we provide here direct evidence of CD20 homo-oligomerization into tetramers. Additionally, the function of CD20 was explored by examining its association with surface-labeled and intracellular proteins before and after BCR signaling. Two major surface-labeled proteins that coprecipitated with CD20 were identified as the heavy and light chains of cell surface IgM, the antigen-binding components of the BCR. After activation, BCR-CD20 complexes dissociated, and phosphoproteins and calmodulin-binding proteins were transiently recruited to CD20. These data provide new evidence of the involvement of CD20 in signaling downstream of the BCR and, together with the previously described involvement of CD20 in calcium influx, the first evidence of physical coupling of the BCR to a calcium entry pathway.
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Affiliation(s)
- Maria J Polyak
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Calgary, Calgary, Alberta T2N 4N1, Canada
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Unruh TL, Li H, Mutch CM, Shariat N, Grigoriou L, Sanyal R, Brown CB, Deans JP. Cholesterol depletion inhibits src family kinase-dependent calcium mobilization and apoptosis induced by rituximab crosslinking. Immunology 2005; 116:223-32. [PMID: 16162271 PMCID: PMC1817827 DOI: 10.1111/j.1365-2567.2005.02213.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] [Imported: 09/13/2023] Open
Abstract
The monoclonal antibody (mAb) rituximab produces objective clinical responses in patients with B-cell non-Hodgkin's lymphoma and antibody-based autoimmune diseases. Mechanisms mediating B-cell depletion by rituximab are not completely understood and may include direct effects of signalling via the target antigen CD20. Like most but not all CD20 mAbs, rituximab induces a sharp change in the solubility of the CD20 protein in the non-ionic detergent Triton-X-100, reflecting a dramatic increase in the innate affinity of CD20 for membrane raft signalling domains. Apoptosis induced by rituximab hypercrosslinking has been shown to require src family kinases (SFK), which are enriched in rafts. In this report we provide experimental evidence that SFK-dependent apoptotic signals induced by rituximab are raft dependent. Cholesterol depletion prevented the association of hypercrosslinked CD20 with detergent-insoluble rafts, and attenuated both calcium mobilization and apoptosis induced with rituximab. CD20 cocapped with the raft-associated transmembrane adaptor LAB/NTAL after hypercrosslinking with CD20 mAbs, regardless of their ability to induce a change in the affinity of CD20 for rafts. Taken together, the data demonstrate that CD20 hypercrosslinking via rituximab activates SFKs and downstream signalling events by clustering membrane rafts in which antibody-bound CD20 is localized in a high-affinity configuration.
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Affiliation(s)
- Tammy L Unruh
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
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Li H, Ayer LM, Polyak MJ, Mutch CM, Petrie RJ, Gauthier L, Shariat N, Hendzel MJ, Shaw AR, Patel KD, Deans JP. The CD20 calcium channel is localized to microvilli and constitutively associated with membrane rafts: antibody binding increases the affinity of the association through an epitope-dependent cross-linking-independent mechanism. J Biol Chem 2004; 279:19893-901. [PMID: 14976189 DOI: 10.1074/jbc.m400525200] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] [Imported: 09/13/2023] Open
Abstract
CD20 is a B cell-specific membrane protein that functions in store-operated calcium entry and serves as a useful target for antibody-mediated therapeutic depletion of B cells. Antibody binding to CD20 induces a diversity of biological effects, some of which are dependent on lipid rafts. Rafts are isolated as low density detergent-resistant membranes, initially characterized using Triton X-100. We have previously reported that CD20 is soluble in 1% Triton but that antibodies induce the association of CD20 with Triton-resistant rafts. However, by using several other detergents to isolate rafts and by microscopic co-localization with a glycosylphosphatidylinositol-linked protein, we show in this report that CD20 is constitutively raft-associated. CD20 was distributed in a punctate pattern on the cell surface as visualized by fluorescence imaging and was also localized to microvilli by electron microscopy. The mechanism underlying antibody-induced association of CD20 with Triton-resistant rafts was investigated and found not to require cellular ATP, kinase activity, actin polymerization, or antibody cross-linking but was dependent on the epitope recognized. Thus, antibody-induced insolubility in 1% Triton most likely reflects a transition from relatively weak to strong raft association that occurs as a result of a conformational change in the CD20 protein.
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Affiliation(s)
- Haidong Li
- Department of Biochemistry and Molecular Biology, University of Calgary, Health Sciences Center, 3330 Hospital Drive NW, Calgary, Alberta T2N 4N1, Canada
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Abstract
B cell activation requires sustained elevation of cytoplasmic free calcium, achieved by influx through store-operated calcium (SOC) channels. The molecular identity of these channels is not known. Ectopic expression of the raft-associated tetraspan protein CD20 in Chinese hamster ovary cells introduced a novel SOC entry pathway that was permeable to strontium as well as to calcium. The activity of this SOC pathway was abolished by deletion of a cytoplasmic sequence in CD20 essential for its efficient raft localization. Strontium-permeable SOC channels were detected in B cells, and B cell receptor-stimulated influx was significantly reduced by downregulation of CD20 expression using short interfering RNA and also by cholesterol depletion. This is the first evidence that raft-associated CD20 constitutes a component of a SOC entry pathway activated by the B cell receptor.
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Affiliation(s)
- Haidong Li
- Immunology Research Group, Department of Biochemistry and Molecular Biology, University of Calgary Health Sciences Center, 3330 Hospital Drive NW, Calgary, Alberta T2N 4N1, Canada
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Abstract
CD20 is an effective target for therapeutic B-cell depletion with monoclonal antibodies. One proposed mechanism of action is direct cytotoxicity mediated via tyrosine kinase-dependent signalling pathways activated upon CD20 cross-linking. The association of CD20 with membrane microdomains known as lipid rafts, enriched in src-family tyrosine kinases and other signalling effectors, suggests an indirect mechanism of anti-CD20-induced apoptosis in which activation of src-family kinases occurs as a consequence of lipid raft clustering.
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Affiliation(s)
- Julie P Deans
- Immunology Research Group, Department of Biochemistry and Molecular Biology, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada T2N 4N1.
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