scholarly journals Melatonin attenuates radiation-induced cortical bone-derived stem cells injury and enhances bone repair in postradiation femoral defect model

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Wei Hu ◽  
Jia-Wu Liang ◽  
Song Liao ◽  
Zhi-Dong Zhao ◽  
Yu-Xing Wang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Flow Cytometry ◽  
Genomic Stability ◽  
Bone Defects ◽  
Self Renewal ◽  
Femoral Defect ◽  
Tnf Α ◽  
Radiation Induced ◽  
Γ Ray

Abstract Background The healing of bone defects can be challenging for clinicians to manage, especially after exposure to ionizing radiation. In this regard, radiation therapy and accidental exposure to gamma (γ)-ray radiation have been shown to inhibit bone formation and increase the risk of fractures. Cortical bone-derived stem cells (CBSCs) are reportedly essential for osteogenic lineages, bone maintenance and repair. This study aimed to investigate the effects of melatonin on postradiation CBSCs and bone defect healing. Methods CBSCs were extracted from C57BL/6 mice and were identified by flow cytometry. Then CBSCs were subjected to 6 Gy γ-ray radiation followed by treatment with various concentrations of melatonin. The effects of exogenous melatonin on the self-renewal and osteogenic capacity of postradiation CBSCs in vitro were analyzed. The underlying mechanisms involved in genomic stability, apoptosis and oxidative stress-related signaling were further analyzed by Western blotting, flow cytometry and immunofluorescence assays. Moreover, postradiation femoral defect models were established and treated with Matrigel and melatonin. The effects of melatonin on postradiation bone healing in vivo were evaluated by micro-CT and pathological analysis. Results The decrease in radiation-induced self-renewal and osteogenic capacity were partially reversed in postradiation CBSCs treated with melatonin (P < 0.05). Melatonin maintained genomic stability, reduced postradiation CBSC apoptosis and intracellular oxidative stress, and enhanced expression of antioxidant-related enzymes (P < 0.05). Western blotting validated the anti-inflammatory effects of melatonin by downregulating interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-α) levels via the extracellular regulated kinase (ERK)/nuclear factor erythroid 2-related factor 2 (NRF2)/heme oxygenase-1 (HO-1) signaling pathway. Melatonin was also found to exhibit antioxidant effects via NRF2 signaling. In vivo experiments demonstrated that the newly formed bone in the melatonin plus Matrigel group had higher trabecular bone volume per tissue volume (BV/TV) and bone mineral density values with lower IL-6 and TNF-α levels than in the irradiation and the Matrigel groups (P < 0.05). Conclusion This study suggested that melatonin could protect CBSCs against γ-ray radiation and assist in the healing of postradiation bone defects.

Melatonin attenuates radiation-induced cortical bone-derived stem cells injury and enhances bone repair in postradiation femoral defect model

2021 ◽  
Author(s):  
Wei Hu ◽  
Jiawu Liang ◽  
Song Liao ◽  
Zhidong Zhao ◽  
Yuxing Wang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Stem Cells ◽  
Flow Cytometry ◽  
Genomic Stability ◽  
Bone Defects ◽  
Self Renewal ◽  
Tnf Α ◽  
Radiation Induced ◽  
Γ Ray

Abstract Background Ionizing radiation poses a challenge to the healing of bone defects. Radiation therapy and accidental exposure to gamma-ray (γ-ray) radiation inhibit bone formation and increase the risk of fractures. Cortical bone-derived stem cells (CBSCs) are essential for osteogenic lineages, bone maintenance, and repair. This study aimed to investigate the effects of melatonin on postradiation CBSCs and bone defects. Methods CBSCs were extracted from C57/BL6 mice and were identified by flow cytometry. The effects of exogenous melatonin on the self-renewal and osteogenic capacity of postradiation CBSCs were detected in vitro. The underlying mechanisms in terms of genomic stability, apoptosis and oxidative stress-related signaling were further analyzed by western blotting, flow cytometry and immunofluorescence. Finally, the effects of melatonin on healing in postradiation bone defects were evaluated in vivo by micro-CT and immunohistochemical analysis. Results The radiation-induced reduced self-renewal and osteogenic capacity were partially reversed in postradiation CBSCs treated with melatonin. Melatonin maintained the genomic stability and apoptosis of postradiation CBSCs, and intracellular oxidative stress was decreased significantly while antioxidant-related enzymes were enhanced. Western blotting verified the anti-inflammatory effect of melatonin by downregulating the levels of IL-6 and TNF-α via extracellular regulated kinase (ERK)/nuclear factor erythroid 2-related factor 2 (NRF2)/heme oxygenase 1 (HO-1) signaling, distinct from its antioxidant effect via NRF2 signaling. In vivo experiments demonstrated that the newly formed bone in the melatonin plus Matrigel group had higher trabecular bone volume per tissue volume (BV/TV) and bone mineral density (BMD) values, and lower levels of IL-6 and TNF-α than those in the irradiation and the Matrigel groups. Conclusions This study suggested the potential of melatonin to protect CBSCs against γ-ray radiation and to assist the healing of postradiation bone defects.

scholarly journals Honokiol ameliorates radiation-induced brain injury via the activation of SIRT3

2020 ◽  
Vol 48 (10) ◽  
pp. 030006052096399
Author(s):  
Guixiang Liao ◽  
Zhihong Zhao ◽  
Hongli Yang ◽  
Xiaming Li
Keyword(s):  
Oxidative Stress ◽  
Brain Injury ◽  
Inflammatory Responses ◽  
Tissue Injury ◽  
Interleukin 1 ◽  
Dependent Manner ◽  
Ht22 Cells ◽  
Tnf Α ◽  
Radiation Induced ◽  
Cox 2

Objective Sirtuin 3 (SIRT3) plays a vital role in regulating oxidative stress in tissue injury. The aim of this study was to evaluate the radioprotective effects of honokiol (HKL) in a zebrafish model of radiation-induced brain injury and in HT22 cells. Methods The levels of reactive oxygen species (ROS), tumor necrosis factor-alpha (TNF-α), and interleukin-1 beta (IL-1β) were evaluated in the zebrafish brain and HT22 cells. The expression levels of SIRT3 and cyclooxygenase-2 (COX-2) were measured using western blot assays and real-time polymerase chain reaction (RT-PCR). Results HKL treatment attenuated the levels of ROS, TNF-α, and IL-1β in both the in vivo and in vitro models of irradiation injury. Furthermore, HKL treatment increased the expression of SIRT3 and decreased the expression of COX-2. The radioprotective effects of HKL were achieved via SIRT3 activation. Conclusions HKL attenuated oxidative stress and pro-inflammatory responses in a SIRT3-dependent manner in radiation-induced brain injury.

scholarly journals Succinamide Derivatives Ameliorate Neuroinflammation and Oxidative Stress in Scopolamine-Induced Neurodegeneration

Biomolecules ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 443 ◽  
Author(s):  
Sumbal Iqbal ◽  
Fawad Ali Shah ◽  
Komal Naeem ◽  
Humaira Nadeem ◽  
Sadia Sarwar ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Neuronal Injury ◽  
Binding Affinities ◽  
Glutathione S Transferase ◽  
In Vivo Experiments ◽  
Tnf Α ◽  
And Oxidative Stress ◽  
Necrosis Factor

Oxidative stress-mediated neuroinflammatory events are the hallmark of neurodegenerative diseases. The current study aimed to synthesize a series of novel succinamide derivatives and to further investigate the neuroprotective potential of these compounds against scopolamine-induced neuronal injury by in silico, morphological, and biochemical approaches. The characterization of all the succinamide derivatives was carried out spectroscopically via proton NMR (1H-NMR), FTIR and elemental analysis. Further in vivo experiments showed that scopolamine induced neuronal injury, characterized by downregulated glutathione (GSH), glutathione S-transferase (GST), catalase, and upregulated lipid peroxidation (LPO). Moreover, scopolamine increased the expression of inflammatory mediators such as cyclooxygenase2 (COX2), nuclear factor kappa B (NF-kB), tumor necrosis factor (TNF-α), further associated with cognitive impairment. On the other hand, treatment with succinamide derivatives ameliorated the biochemical and immunohistochemical alterations induced by scopolamine, further supported by the results obtained from molecular docking and binding affinities.

scholarly journals CYP2J2 and EETs Protect Against Pulmonary Hypertension with Lung Ischemia-Reperfusion Injury In Vivo and In Vitro

2021 ◽  
Author(s):  
Yun Ding ◽  
Pengjie Tu ◽  
Yiyong Chen ◽  
Yangyun Huang ◽  
Xiaojie Pan ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Inflammatory Response ◽  
Reperfusion Injury ◽  
Lung Tissue ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Tnf Α ◽  
Anti Inflammatory

Abstract Background Cytochrome P450 epoxygenase 2J2 (CYP2J2) metabolizes arachidonic acid to epoxyeicosatrienoic acids (EETs), which exert anti-inflammatory, anti-apoptotic, pro-proliferative, and antioxidant effects on the cardiovascular system. However, the role of CYP2J2 and EETs in pulmonary arterial hypertension (PAH) with lung ischemia-reperfusion injury (LIRI) remains unclear. In the present study, we investigated the effects of CYP2J2 overexpression and exogenous EETs on PAH with LIRI in vitro and in vivo.Methods CYP2J2 gene was transfected into rat lung tissue by recombinant adeno-associated virus (rAAV) to increase the levels of EETs in serum and lung tissue. A rat model of PAH with LIRI was constructed by tail vein injection of monocrotaline (50 mg/kg) for 4 weeks, followed by clamping of the left pulmonary hilum for 1 h and reperfusion for 2 h. In addition, we established a cellular model of human pulmonary artery endothelial cells (HPAECs) with TNF-α combined with hypoxic reoxygenation (anoxia for 8 h and reoxygenation for 16 h) to determine the effect and mechanism of exogenous EETs.Results CYP2J2 overexpression significantly reduced the inflammatory response, oxidative stress and apoptosis associated with lung injury in PAH with LIRI. In addition, exogenous EETs suppressed inflammatory response and reduced intracellular reactive oxygen species (ROS) production and inhibited apoptosis in a tumor necrosis factor alpha (TNF-α) combined hypoxia-reoxygenation model of HPAECs. Our further studies revealed that the anti-inflammatory effects of CYP2J2 overexpression and EETs might be mediated by PPARγ pathway; the anti-apoptotic effects might be mediated by the PI3K/Ak pathway.Conclusions CYP2J2 overexpression and EETs protect against PAH with LIRI via anti-inflammation, anti-oxidative stress and anti-apoptosis, suggesting that increased levels of EETs may be a promising strategy for the prevention and treatment of PAH with LIRI.

scholarly journals Chemotaxis of Vδ2 T cells to the joints contributes to the pathogenesis of rheumatoid arthritis

2017 ◽  
Vol 76 (12) ◽  
pp. 2075-2084 ◽  
Author(s):  
Wen-Xiu Mo ◽  
Shan-Shan Yin ◽  
Hua Chen ◽  
Chen Zhou ◽  
Jia-Xin Zhou ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Flow Cytometry ◽  
T Cells ◽  
Disease Activity ◽  
Chemokine Receptors ◽  
Interferon Γ ◽  
Receptor Expression ◽  
Migration Assay ◽  
Tnf Α

ObjectivesTo explore the role of Vδ2 T cells in the pathogenesis of rheumatoid arthritis (RA).MethodsSixty-eight patients with RA, 21 patients with osteoarthritis and 21 healthy controls were enrolled in the study. All patients with RA fulfilled the 2010 American College of Rheumatology/European League Against Rheumatism criteria for RA. Peripheral Vδ2T population, chemokine receptor expression and proinflammatory cytokine secretion were quantified by flow cytometry. The infiltration of Vδ2 T cells within the synovium was examined by immunohistochemistry and flow cytometry. The effect of tumour necrosis factor (TNF)-α and interleukin (IL)-6 on Vδ2 T migration was determined by flow cytometry and transwell migration assay.ResultsPeripheral Vδ2T cells, but not Vδ1 T cells, were significantly lower in patients with RA, which was negatively correlated with disease activity gauged by Disease Activity Score in 28 joints. Vδ2 T cells from RA accumulated in the synovium and produced high levels of proinflammatory cytokines including interferon-γ and IL-17. Phenotypically, Vδ2 T cells from RA showed elevated chemotaxis potential and expressed high levels of chemokine receptors CCR5 and CXCR3, which was driven by increased serum TNF-α through nuclear factor kappa B signalling. In vivo, TNF-α neutralising therapy dramatically downregulated CCR5 and CXCR3 on Vδ2 T cells and repopulated the peripheral Vδ2 T cells in patients with RA.ConclusionsHigh levels of TNF-α promoted CCR5 and CXCR3 expression in Vδ2 T cells from RA, which potentially infiltrated into the synovium and played crucial roles in the pathogenesis of RA. Targeting Vδ2 T cells might be a potential approach for RA.

scholarly journals Thymoquinone Rescues T Lymphocytes from Gamma Irradiation-Induced Apoptosis and Exhaustion by Modulating Pro-Inflammatory Cytokine Levels and PD-1, Bax, and Bcl-2 Signaling

2016 ◽  
Vol 38 (2) ◽  
pp. 786-800 ◽  
Author(s):  
Mona Samy Guida ◽  
Ali Abd El-Aal ◽  
Yehya Kafafy ◽  
Safwat Farid Salama ◽  
Badr Mohamed Badr ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
T Cell ◽  
Gamma Radiation ◽  
Inflammatory Cytokine ◽  
Caspase 3 ◽  
Flow Cytometry Analysis ◽  
Tnf Α ◽  
Cytokine Levels ◽  
Radiation Induced ◽  
Gamma Irradiated

Background/Aims: Recent studies have shown that thymoquinone (TQ) exerts protective effects against ionizing radiation-induced cataracts in lens after total cranium irradiation of rats. Nevertheless, there is no published work investigated the effects of TQ on T cell development and biology in animal models exposed to gamma radiation. Therefore, in the present study we focused on determining the effects of TQ on radiation damage in the thymus, radiation-induced T cell imbalance, and on immune dysfunction induced by gamma-rays. Methods: Three groups of rats were used: a control group, a gamma-irradiated group, and a gamma-irradiated group that was orally supplemented with TQ. Serum lipid profiles, malondialdehyde (MDA) levels, and pro-inflammatory cytokine levels were measured to assess gamma irradiation-induced oxidative stress and inflammatory capacity. T cell apoptosis was evaluated by annexin V/propidium iodide staining followed by flow cytometry analysis. The expression of pro-apoptotic proteins such as Bax and caspase-3, the anti-apoptotic protein Bcl-2, and an exhaustion marker of T cells (PD-1) in CD4+ and CD8+ T cell populations was evaluated using flow cytometry analysis. The T cell architecture of the thymus gland was evaluated by histological analysis. Results: Exposure to gamma radiation increased triglyceride, cholesterol, LDL-C, MDA, TNF-α and IL-6 levels and decreased HDL-C levels. The altered lipid profile and MDA and pro-inflammatory cytokine (TNF-α and IL-6) levels induced by exposure to gamma radiation were significantly restored in TQ-treated gamma-irradiated rats. Rats exposed to gamma radiation exhibited increased exhaustion of T lymphocytes via down-regulation of Bcl-2 expression and upregulation of PD-1, Bax, and caspase-3 expression, which sensitized these cells to apoptosis. Interestingly, treatment of gamma-irradiated rats with TQ decreased T cell exhaustion and apoptosis by modulating the expression of Bcl-2, PD-1, Bax, and caspase-3. Conclusions: Our results provide evidence for the beneficial effects of TQ as an effective radioprotective candidate that enhances cellular immunity.

scholarly journals Zymosan-a Protects the Hematopoietic System from Radiation-Induced Damage by Targeting TLR2 Signaling Pathway

2017 ◽  
Vol 43 (2) ◽  
pp. 457-464 ◽  
Author(s):  
Jicong Du ◽  
Ying Cheng ◽  
Suhe Dong ◽  
Pei Zhang ◽  
Jiaming Guo ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Cell Viability ◽  
Signaling Pathway ◽  
Enzyme Linked Immunosorbent Assay ◽  
Hematopoietic System ◽  
Zymosan A ◽  
Radiation Induced ◽  
Total Body ◽  
Tlr2 Signaling

Background/Aims: The hematopoietic system is vulnerable to ionizing radiation and is often severely damaged by radiation. Molecules affecting radioresistance include Toll-like receptor 2. We investigated whether Zymosan-A, a novel TLR2 agonist, can protect the hematopoietic system from radiation-induced damage after total body irradiation. Methods: Mice were exposed to total body radiation after treatment with Zymosan-A or normal saline, and their survival was recorded. Tissue damage was evaluated by hematoxylin–eosin staining. The number of nucleated cells in bone marrow was determined by flow cytometry. Cell viability and apoptosis assay were determined by CCK-8 assay and flow cytometry assay. Enzyme-linked immunosorbent assay was used to detect the level of cytokines. Results: Zymosan-A protected mice from radiation-induced death and prevented radiation-induced hematopoietic system damage. Zymosan-A also promoted cell viability and inhibited cell apoptosis caused by radiation, induced radioprotective effects via TLR2, upregulated IL-6, IL-11, IL-12, and TNF-α in vivo. Conclusion: Zymosan-A can provide protection against radiation-induced hematopoietic system damage by targeting the TLR2 signaling pathway. Thus, Zymosan-A can be potentially effective radioprotectant.

scholarly journals Plant Extract of Limonium gmelinii Attenuates Oxidative Responses in Neurons, Astrocytes, and Cerebral Endothelial Cells In Vitro and Improves Motor Functions of Rats after Middle Cerebral Artery Occlusion

Antioxidants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1814
Author(s):  
Tulendy Nurkenov ◽  
Andrey Tsoy ◽  
Farkhad Olzhayev ◽  
Elvira Abzhanova ◽  
Anel Turgambayeva ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Nadph Oxidase ◽  
Middle Cerebral Artery ◽  
Artery Occlusion ◽  
Ros Generation ◽  
Tnf Α ◽  
Cerebral Artery Occlusion ◽  
Nadph Oxidase Activation

There are numerous publications demonstrating that plant polyphenols can reduce oxidative stress and inflammatory processes in the brain. In the present study we have investigated the neuroprotective effect of plant extract isolated from the roots of L. gmelinii since it contains a rich source of polyphenols and other biologically active compounds. We have applied an oxidative and inflammatory model induced by NMDA, H2O2, and TNF-α in human primary neurons and astrocytes, and mouse cerebral endothelial cell (CECs) line in vitro. The levels of ROS generation, NADPH oxidase activation, P-selectin expression, and activity of ERK1/2 were evaluated by quantitative immunofluorescence analysis, confocal microscopy, and MAPK assay. In vivo, sensorimotor functions in rats with middle cerebral artery occlusion (MCAO) were assessed. In neurons NMDA induced overproduction of ROS, in astrocytes TNF-α initiated ROS generation, NADPH oxidase activation, and phosphorylation of ERK1/2. In CECs, the exposure by TNF-α induced oxidative stress and triggered the accumulation of P-selectin on the surface of the cells. In turn, pre-treatment of the cells with the extract of L. gmelinii suppressed oxidative stress in all cell types and pro-inflammatory responses in astrocytes and CECs. In vivo, the treatment with L. gmelinii extract improved motor activity in rats with MCAO.

scholarly journals Cimifugin ameliorates imiquimod-induced psoriasis by inhibiting oxidative stress and inflammation via NF-κB/MAPK pathway

2020 ◽  
Vol 40 (6) ◽  
Author(s):  
Aimin Liu ◽  
Wei Zhao ◽  
Buxin Zhang ◽  
Yuanhui Tu ◽  
Qingxing Wang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Inflammatory Diseases ◽  
Mapk Pathway ◽  
Severity Index ◽  
Mapk Signaling ◽  
Psoriasis Area Severity Index ◽  
Tnf Α ◽  
Necrosis Factor

Abstract Cimifugin is an important component of chromones in the dry roots of Saposhikovia divaricata for treating inflammatory diseases. However, the possible effect of cimifugin in psoriasis needs further investigation. This current work was designed to evaluate the effects of cimifugin in psoriasis in vivo and in vitro, and unravel the underlying molecular mechanism. Here, we used imiquimod (IMQ) or tumor necrosis factor (TNF)-α to induce a psoriasis-like model in mice or keratinocytes. Obviously, the results showed that cimifugin reduced epidermal hyperplasia, psoriasis area severity index (PASI) scores, ear thickness and histological psoriasiform lesions in IMQ-induced mice. The decreased levels of reduced glutathione (GSH), superoxide dismutase (SOD) and catalase (CAT), and the accumulation of malondialdehyde (MDA) in skin tissues by IMQ were attenuated by cimifugin. Furthermore, it was observed that cimifugin effectively reversed IMQ-induced up-regulation of proinflammatory cytokines, including TNF-α, IL-6, IL-1β, IL-17A, and IL-22. Mechanically, we noticed that cimifugin inhibited IMQ-activated phosphorylation of NF-κB (IκB and p65) and MAPK (JNK, ERK, and p38) signaling pathways. Similar alterations for oxidative stress and inflammation parameters were also detected in TNF-α-treated HaCaT cells. In addition, cimifugin-induced down-regulation of ICAM-1 were observed in TNF-α-treated cells. Altogether, our findings suggest that cimifugin protects against oxidative stress and inflammation in psoriasis-like pathogenesis by inactivating NF-κB/MAPK signaling pathway, which may develop a novel and effective drug for the therapy of psoriasis.

scholarly journals Canthin-6-one ameliorates TNBS-induced colitis in rats by modulating inflammation and oxidative stress. An in vivo and in silico approach

2020 ◽  
Author(s):  
Domingos Tabajara Martins ◽  
Karuppusamy Arunachalam ◽  
Amilcar Sabino Damazo ◽  
Antonio Macho ◽  
Monica Steffi Matchado ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
In Silico ◽  
Sham Group ◽  
Therapeutic Potential ◽  
Indole Alkaloid ◽  
Mitogen Activated Protein Kinase ◽  
Trinitrobenzenesulfonic Acid ◽  
Tnf Α ◽  
Anti Inflammatory

Background and Purpose: Canthin-6-one (Cant) is an indole alkaloid found in different medicinal plants, reported to be gastroprotective, anti-inflammatory, anti-microbial, anti-diarrheal and anti-proliferative. We aimed to explore Cant in the management of ulcerative colitis (UC) using a trinitrobenzenesulfonic acid (TNBS)-induced rat model. Experimental Approach: Cant (1, 5 and 25 mg/kg) was administered by oral gavage to Wistar rats followed by induction of colitis with TNBS. Macroscopic and histopathological scores, myeloperoxidase (MPO), malondialdehyde (MDA) and reduced glutathione (GSH) were assessed in colon tissues. Pro- (TNF-α, IL-1β and IL-12p70) and anti-inflammatory (IL-10) cytokines, and vascular endothelial growth factor (VEGF) were also quantified. Mitogen-activated protein kinase 14 (MAPK14) and Toll-like receptor-8 (TLR8), as putative targets, were considered through in silico analysis. Key Results: Cant (5 and 25 mg/kg) reduced macroscopic and histological colon damage scores in TNBS-treated rats. MPO and MDA were reduced by up to 61.69% and 92.45%, respectively, compared to TNBS-treated rats alone. Glutathione concentration was reduced in rats administered with TNBS alone (50.00% of sham group), being restored to 72.73% (of sham group) under Cant treatment. TNF-α, IL-1β, IL-12p70 and VEGF were reduced, and anti-inflammatory IL-10 was increased following Cant administration compared to rats administered TNBS alone. Docking ligation results for MAPK14 (p38α) and TLR8 with Cant, confirmed that these proteins are feasible putative targets. Conclusions and Implications: Cant has an anti-inflammatory effect in the intestine by down-regulating immune molecular mediators and decreasing oxidative stress. Therefore, Cant could have therapeutic potential for the treatment of inflammatory bowel disease and related syndromes.

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