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Choi JW, Shin J, Zhou Z, Song HJ, Bae GS, Kim MS, Park SJ. Myricetin ameliorates the severity of pancreatitis in mice by regulating cathepsin B activity and inflammatory cytokine production. Int Immunopharmacol 2024; 136:112284. [PMID: 38823179 DOI: 10.1016/j.intimp.2024.112284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/05/2024] [Accepted: 05/14/2024] [Indexed: 06/03/2024]
Abstract
Cathepsin B (CTSB) and inflammatory cytokines are critical in initiating and developing pancreatitis. Calcineurin, a central calcium (Ca2+)-responsive signaling molecule, mediates acinar cell death and inflammatory responses leading to pancreatitis. However, the detailed mechanisms for regulating CTSB activity and inflammatory cytokine production are unknown. Myricetin (MC) exhibits various biological activities, including anti-inflammatory effects. Here, we aimed to investigate MC effects on pancreatitis and the underlying mechanisms. Prophylactic and therapeutic MC treatment ameliorated the severity of cerulein-, L-arginine-, and PDL-induced acute pancreatitis (AP). The inhibition of CTSB activity by MC was mediated via decreased calcineurin activity and macrophage infiltration, not neutrophils infiltration, into the pancreas. Additionally, calcineurin activity inhibition by MC prevented the phosphorylation of Ca2+/CaM-dependent protein kinase kinase 2 (CaMKK2) during AP, resulting in the inhibition of CaMKIV phosphorylation and adenosine monophosphate-activated protein kinase (AMPK) dephosphorylation. Furthermore, MC reduced nuclear factor-κB activation by modulating the calcineurin-CaMKIV-IKKα/β-Iκ-Bα and calcineurin-AMPK-sirtuin1 axes, resulting in reduced production of tumor necrosis factor-α, interleukin (IL)-1β, and IL-6. Our results showed that MC alleviated AP severity by inhibiting acinar cell death and inflammatory responses, suggesting that MC as a calcineurin and CaMKK2 signaling modulator may be a potential treatment for AP.
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Affiliation(s)
- Ji-Won Choi
- Department of Herbology, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea; Hanbang Cardio-Renal Syndrome Research Center, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea
| | - Joonyeon Shin
- Department of Herbology, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea; Hanbang Cardio-Renal Syndrome Research Center, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea
| | - Ziqi Zhou
- Department of Herbology, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea; Research Center of Traditional Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea
| | - Ho-Joon Song
- Department of Herbology, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea
| | - Gi-Sang Bae
- Hanbang Cardio-Renal Syndrome Research Center, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea; Department of Pharmacology, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea; Research Center of Traditional Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea
| | - Min Seuk Kim
- Department of Oral Physiology, Institute of Biomaterial-Implant, School of Dentistry, Wonkwang University, Iksan, Jeonbuk 54538, Republic of Korea
| | - Sung-Joo Park
- Department of Herbology, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea; Hanbang Cardio-Renal Syndrome Research Center, School of Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea; Research Center of Traditional Korean Medicine, Wonkwang University, Iksan-daero 460, Iksan, Jeollabuk-do 54538, Republic of Korea.
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Chai J, Wu J, Li J, Liao H, Lu W, Guo R, Shao Z, Jmel MA, Martins LA, Hackeng T, Ippel H, Dijkgraaf I, Kotsyfakis M, Xu X. Novel Amphibian Bowman-Birk-Like Inhibitor with Antioxidant and Anticoagulant Effects Ameliorates Pancreatitis Symptoms in Mice. J Med Chem 2023; 66:11869-11880. [PMID: 37610210 DOI: 10.1021/acs.jmedchem.3c00475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Acute pancreatitis (AP) is a serious inflammatory disorder and still lacks effective therapy globally. In this study, a novel Ranacyclin peptide, Ranacin, was identified from the skin of Pelophylax nigromaculatus frog. Ranacin adopted a compact β-hairpin conformation with a disulfide bond (Cys5-Cys15). Ranacin was also demonstrated effectively to inhibit trypsin and have anticoagulant and antioxidant activities in vitro. Furthermore, the severity of pancreatitis was significantly alleviated in l-Arg-induced AP mice after treatment with Ranacin. In addition, structure-activity studies of Ranacin analogues confirmed that the sequences outside the trypsin inhibitory loop (TIL), especially at the C-terminal side, might be closely associated with the efficacy of its trypsin inhibitory activity. In conclusion, our data suggest that Ranacin can improve pancreatic injury in mice with severe AP through its multi-activity. Therefore, Ranacin is considered a potential drug candidate in AP therapy.
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Affiliation(s)
- Jinwei Chai
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jiena Wu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jinqiao Li
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Hang Liao
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Wancheng Lu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Ruiyin Guo
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Zuoyan Shao
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Mohamed Amine Jmel
- Institute of Parasitology, Biology Center of the Czech Academy of Sciences, Branisovska 31, Budweis (Ceske Budejovice) 37005, Czech Republic
| | - Larissa Almeida Martins
- Institute of Parasitology, Biology Center of the Czech Academy of Sciences, Branisovska 31, Budweis (Ceske Budejovice) 37005, Czech Republic
| | - Tilman Hackeng
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Hans Ippel
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Ingrid Dijkgraaf
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Michail Kotsyfakis
- Institute of Parasitology, Biology Center of the Czech Academy of Sciences, Branisovska 31, Budweis (Ceske Budejovice) 37005, Czech Republic
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, N. Plastira 100, 70013 Heracklion, Crete, Greece
| | - Xueqing Xu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
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Li K, Wang J, Chen L, Guo M, Zhou Y, Li X, Peng M. Netrin-1 Ameliorates Postoperative Delirium-Like Behavior in Aged Mice by Suppressing Neuroinflammation and Restoring Impaired Blood-Brain Barrier Permeability. Front Mol Neurosci 2022; 14:751570. [PMID: 35095412 PMCID: PMC8797926 DOI: 10.3389/fnmol.2021.751570] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 12/20/2021] [Indexed: 12/24/2022] Open
Abstract
Postoperative delirium (POD) is a common and serious postoperative complication in elderly patients, and its underlying mechanism is elusive and without effective therapy at present. In recent years, the neuroinflammatory hypothesis has been developed in the pathogenesis of POD, in which the damaged blood-brain barrier (BBB) plays an important role. Netrin-1 (NTN-1), an axonal guidance molecule, has been reported to have strong inflammatory regulatory and neuroprotective effects. We applied NTN-1 (45 μg/kg) to aged mice using a POD model with a simple laparotomy to assess their systemic inflammation and neuroinflammation by detecting interleukin-6 (IL-6), interleukin-10 (IL-10), and high mobility group box chromosomal protein-1 (HMGB-1) levels. We also assessed the reactive states of microglia and the permeability of the BBB by detecting cell junction proteins and the leakage of dextran. We found that a single dose of NTN-1 prophylaxis decreased the expression of IL-6 and HMGB-1 and upregulated the expression of IL-10 in the peripheral blood, hippocampus, and prefrontal cortex. Nerin-1 reduced the activation of microglial cells in the hippocampus and prefrontal cortex and improved POD-like behavior. NTN-1 also attenuated the anesthesia/surgery-induced increase in BBB permeability by upregulating the expression of tight junction-associated proteins such as ZO-1, claudin-5, and occludin. These findings confirm the anti-inflammatory and BBB protective effects of NTN-1 in an inflammatory environment in vivo and provide better insights into the pathophysiology and potential treatment of POD.
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Netrin-1: An Emerging Player in Inflammatory Diseases. Cytokine Growth Factor Rev 2022; 64:46-56. [DOI: 10.1016/j.cytogfr.2022.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/12/2022] [Indexed: 12/14/2022]
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Ziegon L, Schlegel M. Netrin-1: A Modulator of Macrophage Driven Acute and Chronic Inflammation. Int J Mol Sci 2021; 23:275. [PMID: 35008701 PMCID: PMC8745333 DOI: 10.3390/ijms23010275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/22/2021] [Accepted: 12/23/2021] [Indexed: 12/11/2022] Open
Abstract
Netrins belong to the family of laminin-like secreted proteins, which guide axonal migration and neuronal growth in the developing central nervous system. Over the last 20 years, it has been established that netrin-1 acts as a chemoattractive or chemorepulsive cue in diverse biological processes far beyond neuronal development. Netrin-1 has been shown to play a central role in cell adhesion, cell migration, proliferation, and cell survival in neuronal and non-neuronal tissue. In this context, netrin-1 was found to orchestrate organogenesis, angiogenesis, tumorigenesis, and inflammation. In inflammation, as in neuronal development, netrin-1 plays a dichotomous role directing the migration of leukocytes, especially monocytes in the inflamed tissue. Monocyte-derived macrophages have long been known for a similar dual role in inflammation. In response to pathogen-induced acute injury, monocytes are rapidly recruited to damaged tissue as the first line of immune defense to phagocyte pathogens, present antigens to initiate the adaptive immune response, and promote wound healing in the resolution phase. On the other hand, dysregulated macrophages with impaired phagocytosis and egress capacity accumulate in chronic inflammation sites and foster the maintenance-and even the progression-of chronic inflammation. In this review article, we will highlight the dichotomous roles of netrin-1 and its impact on acute and chronic inflammation.
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Affiliation(s)
| | - Martin Schlegel
- Department of Anesthesiology and Intensive Care Medicine, Klinikum Rechts der Isar, Technical University Munich, 81675 Munich, Germany;
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Kim S, Lim Y, Lee SY, Yoon HN, Yi H, Jang KH, Ku NO. Keratin 8 mutations in transgenic mice predispose to lung injury. J Cell Sci 2021; 134:jcs250167. [PMID: 34342355 DOI: 10.1242/jcs.250167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 06/28/2021] [Indexed: 11/20/2022] Open
Abstract
Keratin 8 (K8) is the cytoskeletal intermediate filament protein of simple-type epithelia. Mutations in K8 predispose the affected individual and transgenic mouse to liver disease. However, the role of K8 in the lung has not been reported in mutant transgenic mouse models. Here, we investigated the susceptibility of two different transgenic mice expressing K8 Gly62-Cys (Gly62 replaced with Cys) or Ser74-Ala (Ser74 replaced with Ala) to lung injury. The mutant transgenic mice were highly susceptible to two independent acute and chronic lung injuries compared with control mice. Both K8 Gly62-Cys mice and K8 Ser74-Ala mice showed markedly increased mouse lethality (∼74% mutant mice versus ∼34% control mice) and more severe lung damage, with increased inflammation and apoptosis, under L-arginine-mediated acute lung injury. Moreover, the K8 Ser74-Ala mice had more severe lung damage, with extensive hemorrhage and prominent fibrosis, under bleomycin-induced chronic lung injury. Our study provides the first direct evidence that K8 mutations predispose to lung injury in transgenic mice.
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Affiliation(s)
- Sujin Kim
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - Younglan Lim
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - So-Young Lee
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - Han-Na Yoon
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - Hayan Yi
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - Kwi-Hoon Jang
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - Nam-On Ku
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
- Department of Bio-Convergence ISED, Underwood International College, Yonsei University, Seoul 03722, Korea
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Elkholy RA, Younis RL, Allam AA, Hagag RY, Abdel Ghafar MT. Diagnostic efficacy of serum and urinary netrin-1 in the early detection of diabetic nephropathy. J Investig Med 2021; 69:1189-1195. [PMID: 33863755 DOI: 10.1136/jim-2021-001785] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2021] [Indexed: 12/19/2022]
Abstract
This study aimed to assess the diagnostic value of serum and urinary netrin-1 in patients with type 2 diabetes mellitus (T2DM) at different stages of diabetic nephropathy (DN) and to compare its efficacy of estimation in serum with that in the urine. This study was carried out on 135 patients with T2DM and 45 healthy subjects. The patients with diabetes were divided according to urinary albumin creatinine ratio (UACR) into: T2DM with normoalbuminuria, incipient DN with microalbuminuria, and overt DN with macroalbuminuria groups. Serum and urinary levels of netrin-1 were measured by ELISA. The mean levels of serum and urinary netrin-1 were significantly higher in the microalbuminuric and macroalbuminuric patients with DN than those in the normoalbuminuric patients with T2DM, with the highest values detected in macroalbuminuric patients with DN. Urinary netrin-1 level was significantly higher in the normoalbuminuric T2DM group than control group, whereas no significant difference existed regarding serum netrin-1 level. In T2DM groups, the urinary and serum netrin-1 correlated with each other and were independently related to fasting blood glucose, UACR, and estimated glomerular filtration rate. Receiver operating characteristic curve analysis showed that the area under the curve of urinary netrin-1 was 0.916 which is significantly higher than that of serum netrin-1 (0.812) for the detection of incipient DN and reached 0.938 on coestimation of both urinary and serum netrin-1. In conclusion, netrin-1 is a potential diagnostic marker for early detection of DN with its estimation in urine has higher accuracy than that of serum.
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Affiliation(s)
- Rasha A Elkholy
- Clinical Pathology, Tanta University Faculty of Medicine, Tanta, Egypt
| | - Reham L Younis
- Physiology, Tanta University Faculty of Medicine, Tanta, Egypt
| | - Alzahraa A Allam
- Internal Medicine, Tanta University Faculty of Medicine, Tanta, Egypt
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Bu HF, Subramanian S, Geng H, Wang X, Liu F, Chou PM, Du C, De Plaen IG, Tan XD. MFG-E8 Plays an Important Role in Attenuating Cerulein-Induced Acute Pancreatitis in Mice. Cells 2021; 10:728. [PMID: 33806041 PMCID: PMC8064467 DOI: 10.3390/cells10040728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/18/2021] [Accepted: 03/22/2021] [Indexed: 11/23/2022] Open
Abstract
Milk fat globule-EGF factor 8 (MFG-E8) is a secreted glycoprotein that regulates tissue homeostasis, possesses potent anti-inflammatory properties, and protects against tissue injury. The human pancreas expresses MFG-E8; however, the role of MFG-E8 in the pancreas remains unclear. We examined the expression of MFG-E8 in the pancreas at baseline and during cerulein-induced acute pancreatitis in mice and determined whether MFG-E8 attenuates the progression of pancreatitis, a serious inflammatory condition that can be life-threatening. We administered cerulein to wild-type (WT) and Mfge8 knockout (KO) mice to induce pancreatitis. Immunoblot analysis showed that MFG-E8 is constitutively expressed in the murine pancreas and is increased in mice with cerulein-induced acute pancreatitis. In situ hybridization revealed that ductal epithelial cells in the mouse pancreas express Mfge8 transcripts at baseline. During pancreatitis, Mfge8 transcripts were abundantly expressed in acinar cells and endothelial cells in addition to ductal epithelial cells. Knocking out Mfge8 in mice exacerbated the severity of cerulein-induced acute pancreatitis and delayed its resolution. In contrast, administration of recombinant MFG-E8 attenuated cerulein-induced acute pancreatitis and promoted repair of pancreatic injury in Mfge8 KO mice. Taken together, our study suggests that MFG-E8 protects the pancreas against inflammatory injury and promotes pancreatic tissue repair. MFG-E8 may represent a novel therapeutic target in acute pancreatitis.
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Affiliation(s)
- Heng-Fu Bu
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA; (H.-F.B.); (S.S.); (H.G.); (X.W.); (F.L.); (C.D.)
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Saravanan Subramanian
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA; (H.-F.B.); (S.S.); (H.G.); (X.W.); (F.L.); (C.D.)
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Hua Geng
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA; (H.-F.B.); (S.S.); (H.G.); (X.W.); (F.L.); (C.D.)
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Xiao Wang
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA; (H.-F.B.); (S.S.); (H.G.); (X.W.); (F.L.); (C.D.)
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Fangyi Liu
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA; (H.-F.B.); (S.S.); (H.G.); (X.W.); (F.L.); (C.D.)
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Pauline M. Chou
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Chao Du
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA; (H.-F.B.); (S.S.); (H.G.); (X.W.); (F.L.); (C.D.)
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
| | - Isabelle G. De Plaen
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
- Division of Neonatology, Department of Pediatrics, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA
| | - Xiao-Di Tan
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA; (H.-F.B.); (S.S.); (H.G.); (X.W.); (F.L.); (C.D.)
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA;
- Department of Research & Development, Jesse Brown Veterans Affairs Medical Center, Chicago, IL 60612, USA
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Abdel-Aziz AM, Rifaai RA, Abdel-Gaber SA. Possible mechanisms mediating the protective effect of cilostazol in L-arginine induced acute pancreatitis in rats: role of cGMP, cAMP, and HO-1. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:1859-1870. [PMID: 32424476 DOI: 10.1007/s00210-020-01897-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Accepted: 05/06/2020] [Indexed: 12/22/2022]
Abstract
Acute pancreatitis (AP) is an inflammatory disorder with a high mortality rate. Cilostazol is a selective phosphodiesterase-3 inhibitor drug that is commonly used as an antiplatelet, antithrombotic, and vasodilator drug. It exhibits antioxidant, anti-inflammatory, and anti-apoptotic activities, but its effect on AP has not been fully elucidated yet. The present study aimed to investigate the effects of cilostazol on L-arginine-induced AP and the possible protective mechanisms. A rat model of AP was established by a single i.p. injection of 3-g/kg L-arginine on day 13 of the experiment. The treated groups received a single daily oral dose of either 100 or 300 mg/kg/day for 14 consecutive days. Rats with AP showed histopathological changes of pancreatic tissue injury together with increased serum amylase enzyme activity and decreased serum insulin, pancreatic adiponectin, and cGMP levels. Moreover, AP rats showed increased pancreatic inflammatory biomarker (TNF-α, VCAM-1, and MPO) levels with decreased anti-inflammatory IL-10 levels. In addition, oxidative stress biomarkers (MDA and NO) were increased in AP with decreased antioxidant SOD activity and GSH level. Moreover, HO-1 immunostaining was increased in the AP group. Cilostazol pretreatment reversed the histopathological change; decreased the amylase activity and the levels of TNF-α, VCAM-1, and MPO; and increased the levels of insulin, adiponectin, cGMP, cAMP, and IL-10. Moreover, cilostazol decreased MDA and NO but increased SOD and GSH. Lastly, cilostazol increased the HO-1 immunostaining more than in the AP group. These data suggest that cilostazol protects against L-arginine-induced AP, which may be related to an increase in cGMP, cAMP, and upregulation of HO-1 with subsequent anti-inflammatory and antioxidant properties.
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Affiliation(s)
| | - Rehab Ahmed Rifaai
- Departments of Histology and cell biology, Faculty of Medicine, Minia University, Minia, 61511, Egypt
| | - Seham A Abdel-Gaber
- Departments of Pharmacology, Faculty of Medicine, Minia University, Minia, 61511, Egypt.
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Li S, Zhang S, Li R, Chen S, Chang S, Chen X, Li Y, Su X, Wu T, Xu M. Prophylactic low-molecular-weight heparin administration protected against severe acute pancreatitis partially by VEGF/Flt-1 signaling in a rat model. Hum Exp Toxicol 2020; 39:1345-1354. [PMID: 32351125 DOI: 10.1177/0960327120919469] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The present study was aimed to explore the effects and the underlying mechanism of prophylactic low-molecular-weight heparin (LMWH) treatment on taurocholate-induced severe acute pancreatitis (SAP) in a rat model. METHODS Rat SAP model was induced by injection of 4% sodium taurocholate into the pancreatic duct. LMWH was applied half an hour before the induction of pancreatitis at the dose of 200 IU/kg subcutaneous injection. The rats were euthanized at 1 h, 6 h, and 12 h after taurocholate-induced SAP. The inflammatory and oxidative response markers were assessed. And the vascular endothelial growth factor (VEGF) and Fms-related tyrosine kinase 1 (Flt-1) expression were evaluated by immunohistochemistry (IHC) and western blot methods. RESULTS The expression of inflammatory and oxidative response markers increased after induction of SAP. IHC and western blot results showed the VEGF and Flt-1 expression were increased in SAP group. Prophylactic LMWH administration reduced the inflammatory and oxidative response markers expression and decreased the expression of VEGF and Flt-1. CONCLUSIONS This study suggested that prophylactic LMWH treatment mitigated the severity of pancreatitis in rat SAP model by anti-inflammation and oxidative response. The underlying mechanism may result from downregulating VEGF/Flt-1 signaling of LMWH in SAP rat model.
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Affiliation(s)
- S Li
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - S Zhang
- Department of General Surgery, Yan'an People's Hospital, Yan'an, People's Republic of China
| | - R Li
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - S Chen
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - S Chang
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - X Chen
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Y Li
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - X Su
- Department of Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - T Wu
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - M Xu
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
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Fei S, Li W, Xiang L, Xie X, Zhang L. Protective Effect of Alprostadil on Acute Pancreatitis in Rats via Inhibiting Janus Kinase 2 (JAK2)/STAT3 Signal Transduction Pathway. Med Sci Monit 2019; 25:7694-7701. [PMID: 31606729 PMCID: PMC6807527 DOI: 10.12659/msm.919148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Background Alprostadil can inhibit inflammation and reduce inflammation-related injury in many inflammatory diseases. However, the anti-inflammatory effect of alprostadil in decreasing acute pancreatitis (AP) injury remains unknow. This study aimed to investigate the possible protective effects and mechanism of alprostadil against AP in rats. Material/Methods Forty healthy Sprague-Dawley rats were randomly divided into a control group, an AP group, an AP-alprostadil group, an AP-AG490 group, and an AP-(alprostadil+AG490) group. An animal model of acute pancreatitis was established. The pathological changes of the pancreases in each group were observed. We assessed levels of malondialdehyde (MDA), superoxide dismutase (SOD), and myeloperoxidase (MPO), as well as serum IL-1β, IL-6, IL-10, and TNF-α. TUNEL assay was used to detect apoptosis of pancreatic cells. The proteins p-Jak2 and p-Stat3 were investigated by Western blot. Results Compared with the control group, pancreatic pathological score, pancreatic apoptosis, MDA, MPO, serum IL-1β, IL-6, and TNF-α levels were significantly higher in the AP group, and SOD levels were significantly decreased. Compared with the AP group, after treatment with alprostadil, AG490, and alprostadil+AG490, respectively, the pancreatic pathological score, apoptosis, MDA, MPO, serum IL-1β, IL-6, and TNF-α were significantly decreased in AP rats, while SOD levels were significantly increased. The protein levels of p-JAK2 and p-STAT3 were significantly upregulated in the AP group compared with the control group, and the protein levels of p-JAK2 and p-STAT3 after treatment with alprostadil, AG490, and alprostadil+AG490 were significantly decreased, and the effect of alprostadil+AG490 was the strongest. Conclusions Alprostadil can reduce pancreatic tissue damage, delay pancreatic cell apoptosis, and reduce inflammation and anti-oxidative stress by inhibiting the JAK2/STAT3 signal pathway, thus protecting the pancreas.
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Affiliation(s)
- Shuke Fei
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital of University of South China, Hengyang, Hunan, China (mainland)
| | - Wei Li
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of University of South China, Hengyang, Hunan, China (mainland)
| | - Lei Xiang
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital of University of South China, Hengyang, Hunan, China (mainland)
| | - Xuewen Xie
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital of University of South China, Hengyang, Hunan, China (mainland)
| | - Liang Zhang
- Department of Rheumatism Immunology, Zhuzhou Central Hospital, Zhuzhou, Hunan, China (mainland)
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El-Kashef DH, Shaaban AA, El-Agamy DS. Protective role of pirfenidone against experimentally-induced pancreatitis. Pharmacol Rep 2019; 71:774-781. [PMID: 31376587 DOI: 10.1016/j.pharep.2019.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/02/2019] [Accepted: 04/08/2019] [Indexed: 01/19/2023]
Abstract
BACKGROUND Pirfenidone (PFD) is an orally active antifibrotic agent that has anti-inflammatory activity in diverse animal models. Its effect against acute pancreatitis (AP) has not been elucidated. Hence, the present investigation was carried out to assess the potential protective role of PFD against l-arginine-induced AP in mice. METHODS AP was induced in adult male Swiss albino mice via intraperitoneal injections of l-arginine (4 g/kg, twice each 1 h apart). PFD (250 mg/kg, orally) was administered one day before and on the day of l-arginine challenge. Twenty-four hours after l-arginine injection, the severity of AP was evaluated using biochemical and histological analyses. Indices of oxidative stress, inflammation and apoptosis were evaluated using ELISA and immunohistochemistry (IHC). RESULTS PFD suppressed the development of l-arginine-induced AP as revealed by the improvement of histopathological lesions of pancreatic specimen and the significant reduction of serum amylase and lipase levels. Notably, PFD reduced the lipid peroxidation and enhanced the antioxidants such as reduced glutathione (GSH) and superoxide dismutase (SOD) in pancreatic tissue. Importantly, PFD suppressed AP-associated elevation of inflammatory cytokines along with depression of nuclear factor kappa-B (NF-κB) immuno-expression in pancreatic tissue. Lastly, PFD efficiently ameliorated AP-induced elevation of the pro-apoptotic protein (Bax) and increased AP-induced reduction of the anti-apoptotic protein (Bcl2). CONCLUSIONS PFD protected against l-arginine-induced AP in mice through anti-oxidative, anti-inflammatory and anti-apoptotic properties.
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Affiliation(s)
- Dalia H El-Kashef
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Ahmed A Shaaban
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt; Faculty of Pharmacy, Aqaba University of Technology, Aqaba, Jordan
| | - Dina S El-Agamy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt; Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawwarah, Saudi Arabia.
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13
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Vrolyk V, Schneberger D, Le K, Wobeser BK, Singh B. Mouse model to study pulmonary intravascular macrophage recruitment and lung inflammation in acute necrotizing pancreatitis. Cell Tissue Res 2019; 378:97-111. [DOI: 10.1007/s00441-019-03023-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 03/27/2019] [Indexed: 12/18/2022]
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14
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Zhou Y, Lin J, Peng X, Li C, Zhang J, Wang Q, Zhu G, You J, Zhao G. The role of netrin-1 in the mouse cornea during Aspergillus fumigatus infection. Int Immunopharmacol 2019; 71:372-381. [PMID: 30952101 DOI: 10.1016/j.intimp.2019.03.047] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 03/15/2019] [Accepted: 03/25/2019] [Indexed: 10/27/2022]
Abstract
PURPOSE To explore the effects of netrin-1 on inflammation in Aspergillus fumigatus-infected mouse corneas and on proliferation and migration in human corneal epithelial cells (HCECs). METHODS Netrin-1 and the receptor A2BAR were detected in normal and infected corneas from C57BL/6 mice and RAW 264.7 cells. The mice were injected subconjunctivally with recombinant netrin-1. The severity of the disease was determined by clinical scores, photography with a slit lamp, RT-PCR, western blotting, myeloperoxidase (MPO) assays and immunofluorescence staining of polymorphonuclear neutrophilic leukocytes (PMNs). The effects of netrin-1 on RAW 264.7 cells in vitro were determined by RT-PCR. The role of A2BAR was demonstrated in vivo by detecting the expression of IL-1β, TNF-α, and IL-10 in corneas pretreated subconjunctivally with an A2BAR antagonist (PSB1115). RAW 264.7 cells were stimulated with Aspergillus fumigatus (A. fumigates) and netrin-1 with or without PSB1115 pretreatment. A cell counting kit-8 (CCK-8) assay was used to evaluate cell proliferation ability, and cell migration ability was determined by cell scratch experiments with HCECs. RESULTS Netrin-1 expression decreased slightly after A. fumigatus infection and then increased to its peak. A2BAR expression increased at 1 day post infection (p.i.), with a subsequent decline. Compared to the PBS control, exogenous netrin-1 attenuated the inflammatory response, PMN infiltration, and expression of the proinflammatory factors IL-1β and TNF-α, while IL-10 expression was up-regulated. In RAW 264.7 cells, recombinant netrin-1 obviously inhibited the mRNA expression of IL-1β and TNF-α and promoted the mRNA expression of the anti-inflammatory cytokine IL-10. Pretreatment with PSB1115 resulted in disease aggravation and higher levels of the proinflammatory factors IL-1β and TNF-α both in vivo and in vitro. And the effect of netrin-1 on inflammatory factors was abolished by PSB1115. Moreover, compared to the control treatment, exogenous netrin-1 significantly facilitated the proliferation and migration of HCECs. CONCLUSIONS Netrin-1 attenuates inflammation in C57BL/6 mice infected with A. fumigatus, and it may play this role via the receptor A2BAR. Additionally, netrin-1 can promote the proliferation and migration of HCECs.
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Affiliation(s)
- Yifan Zhou
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jing Lin
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xudong Peng
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Cui Li
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jie Zhang
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qian Wang
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Guoqiang Zhu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jia You
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Guiqiu Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China.
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15
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Tao L, Lin X, Tan S, Lei Y, Liu H, Guo Y, Zheng F, Wu B. β-Arrestin1 alleviates acute pancreatitis via repression of NF-κBp65 activation. J Gastroenterol Hepatol 2019; 34:284-292. [PMID: 30144357 DOI: 10.1111/jgh.14450] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 08/10/2018] [Accepted: 08/10/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM β-Arrestins (β-arrs) are regulators and mediators of G protein-coupled receptor signaling that are functionally involved in inflammation. Nuclear factor-κB p65 (NF-κBp65) activation has been observed early in the onset of pancreatitis. However, the effect of β-arrs in acute pancreatitis (AP) is unclear. The aim of this study is to investigate whether β-arrs are involved in AP through activation of NF-κBp65. METHODS Acute pancreatitis was induced by either caerulein injection or choline-deficient supplemented with ethionine diet (CDE). β-arr1 wild-type and β-arr1 knockout mice were used in the experiment. The survival rate was calculated in the CDE model mice. Histological and western blot analyses were performed in the caerulein model. Inflammatory mediators were detected by real-time polymerase chain reaction in the caerulein-induced AP mice. Furthermore, AR42J and PANC-1 cell lines were used to further study the effects of β-arr1 in caerulein-induced pancreatic cells. RESULTS β-Arr1 but not β-arr2 is significantly downregulated in caerulein-induced AP in mice. Targeted deletion of β-arr1 notably upregulated expression of the pancreatic inflammatory mediators including tumor necrosis factor α and interleukin 1β as well as interleukin 6 and aggravated AP in caerulein-induced mice. β-Arr1 deficiency increased mortality in mice with CDE-induced AP. Further, β-arr1 deficiency enhanced caerulein-induced phosphorylation of NF-κBp65 both in vivo and in vitro. CONCLUSION β-Arr1 alleviates AP via repression of NF-κBp65 activation, and it is a potentially therapeutic target for AP.
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Affiliation(s)
- Li Tao
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xianyi Lin
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Siwei Tan
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yiming Lei
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Huiling Liu
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yuwei Guo
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Fengping Zheng
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Bin Wu
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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16
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Zhang Y, Chen P, Di G, Qi X, Zhou Q, Gao H. Netrin-1 promotes diabetic corneal wound healing through molecular mechanisms mediated via the adenosine 2B receptor. Sci Rep 2018; 8:5994. [PMID: 29662125 PMCID: PMC5902612 DOI: 10.1038/s41598-018-24506-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 04/03/2018] [Indexed: 11/09/2022] Open
Abstract
Netrins are secreted chemoattractants with the roles in axon guidance, cell migration and epithelial plasticity. In the present study, we investigated the roles of netrin-1 in the regulation of corneal epithelial wound healing, inflammation response and nerve fiber regeneration in diabetic mice and cultured corneal epithelial cells. In diabetic mice, the expression of netrin-1 was decreased when compared with that of normal mice. Furthermore, high glucose blocked the wounding-induced up-regulation of netrin-1 expression in corneal epithelial cells. Exogenous netrin-1 promoted the corneal epithelial wound healing in diabetic mice, and facilitated the proliferation and migration by reactivating the phosphorylation of ERK and EGFR in high-glucose treated corneal epithelial cells. Moreover, netrin-1 decreased the neutrophil infiltration and promoted M2 macrophage transition, accompanied with the attenuated expression of pro-inflammatory factors in diabetic mouse corneal epithelium. The promotions of netrin-1 on corneal epithelial wound healing and inflammation resolution were mediated at least through the adenosine 2B receptor. In addition, netrin-1 promoted the regeneration of corneal nerve fibers that was impaired in diabetic mice. Taken together, netrin-1 regulates corneal epithelial wound healing, inflammation response and nerve fiber regeneration in diabetic mice, indicating the potential application for the therapy of diabetic keratopathy.
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Affiliation(s)
- Yangyang Zhang
- School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan, China.,State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China
| | - Peng Chen
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China
| | - Guohu Di
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China
| | - Xia Qi
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China
| | - Qingjun Zhou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China.
| | - Hua Gao
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China.
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17
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Yim J, Kim G, Lee BW, Kang ES, Cha BS, Kim JH, Cho JW, Lee SG, Lee YH. Relationship Between Circulating Netrin-1 Concentration, Impaired Fasting Glucose, and Newly Diagnosed Type 2 Diabetes. Front Endocrinol (Lausanne) 2018; 9:691. [PMID: 30532735 PMCID: PMC6265472 DOI: 10.3389/fendo.2018.00691] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 11/02/2018] [Indexed: 01/22/2023] Open
Abstract
Background: The protein netrin-1 has demonstrated anti-inflammatory, tissue regeneration, and immune modulation properties. Although inflammation is a major contributing factor in the development of insulin resistance and type 2 diabetes, little is known about a possible relationship between serum netrin-1 and type 2 diabetes. Therefore, we investigated the association between circulating levels of netrin-1 and glycometabolic parameters predictive of type 2 diabetes. Methods: Serum samples were collected from 41 normal controls, 85 subjects with impaired fasting glucose (IFG), and 92 subjects with newly diagnosed type 2 diabetes. Clinical and laboratory parameters were assessed and netrin-1 levels were measured by commercial enzyme-linked immunosorbent assay. Spearman correlation analyses and multivariable-adjusted regression analyses were conducted to examine the relationship between serum netrin-1 levels and glycometabolic parameters. Results: Serum netrin-1 levels in subjects with type 2 diabetes or IFG were significantly higher compared to normal controls (441.0, 436.6, and 275.9 pg/mL, respectively; P for trend < 0.001). Serum netrin-1 levels were significantly positively correlated with fasting glucose, HbA1c, and insulin resistance index (all Ps < 0.01). Serum netrin-1 levels were independently associated with IFG or type 2 diabetes (standardized β = 0.405, P < 0.001) after adjusting for covariates and potential confounders. In addition, the receiver operating characteristic (ROC) analysis showed that serum netrin-1 levels could identify the presence of IFG and type 2 diabetes with the area under the ROC curve (AUC) of 0.784 (P < 0.001). Conclusions: Our results suggest that elevated serum netrin-1 levels are significantly associated with the presence of IFG and type 2 diabetes.
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Affiliation(s)
- Jisook Yim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, South Korea
- Division of Special Chemistry, Green Cross Reference Laboratory, Yongin-si, South Korea
- Department of Laboratory Medicine, Veterans General Hospital, Incheon, South Korea
| | - Gyuri Kim
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Byung-Wan Lee
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
- Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Eun Seok Kang
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
- Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Bong-Soo Cha
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
- Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Jeong-Ho Kim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Jin Won Cho
- Department of Systems Biology, Glycosylation Network Research Center, Yonsei University, Seoul, South Korea
| | - Sang-Guk Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, South Korea
- *Correspondence: Sang-Guk Lee
| | - Yong-ho Lee
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
- Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
- Department of Systems Biology, Glycosylation Network Research Center, Yonsei University, Seoul, South Korea
- Yong-ho Lee
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18
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Bai L, Mei X, Shen Z, Bi Y, Yuan Y, Guo Z, Wang H, Zhao H, Zhou Z, Wang C, Zhu K, Li G, Lv G. Netrin-1 Improves Functional Recovery through Autophagy Regulation by Activating the AMPK/mTOR Signaling Pathway in Rats with Spinal Cord Injury. Sci Rep 2017; 7:42288. [PMID: 28186165 PMCID: PMC5301251 DOI: 10.1038/srep42288] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 01/04/2017] [Indexed: 01/08/2023] Open
Abstract
Autophagy is an process for the degradation of cytoplasmic aggregated proteins and damaged organelles and plays an important role in the development of SCI. In this study, we investigated the therapeutic effect of Netrin-1 and its potential mechanism for autophagy regulation after SCI. A rat model of SCI was established and used for analysis. Results showed that administration of Netrin-1 not only significantly enhanced the phosphorylation of AMP-activated protein kinase (AMPK) but also reduced the phosphorylation of mammalian target of rapamycin (mTOR) and P70S6K. In addition, the expression of Beclin-1 and the ratio of the light-chain 3B-II (LC3B-II)/LC3B-I in the injured spinal cord significantly increased in Netrin-1 group than those in SCI group. Moreover, the ratio of apoptotic neurons in the anterior horn of the spinal cord and the cavity area of spinal cord significantly decreased in Netrin-1 group compared with those in SCI group. In addition, Netrin-1 not only preserved motor neurons but also significantly improved motor fuction of injured rats. These results suggest that Netrin-1 improved functional recovery through autophagy stimulation by activating the AMPK/mTOR signaling pathway in rats with SCI. Thus, Netrin-1 treatment could be a novel therapeutic strategy for SCI.
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Affiliation(s)
- Liangjie Bai
- Department of Orthopedics, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xifan Mei
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Zhaoliang Shen
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Yunlong Bi
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Yajiang Yuan
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Zhanpeng Guo
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Hongyu Wang
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Haosen Zhao
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Zipeng Zhou
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Chen Wang
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Kunming Zhu
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Gang Li
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Liaoning, China
| | - Gang Lv
- Department of Orthopedics, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
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Abreu FF, Souza ACA, Teixeira SA, Soares AG, Teixeira DF, Soares RC, Santana MT, Lauton Santos S, Costa SKP, Muscará MN, Camargo EA. Elucidating the role of oxidative stress in the therapeutic effect of rutin on experimental acute pancreatitis. Free Radic Res 2016; 50:1350-1360. [DOI: 10.1080/10715762.2016.1247494] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | | | - Simone Aparecida Teixeira
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Antônio Garcia Soares
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | | | | | | | - Sandra Lauton Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Soraia Kátia Pereira Costa
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Marcelo Nicolas Muscará
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
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20
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Dual actions of Netrin-1 on islet insulin secretion and immune modulation. Clin Sci (Lond) 2016; 130:1901-11. [PMID: 27520508 DOI: 10.1042/cs20160133] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 08/12/2016] [Indexed: 12/17/2022]
Abstract
Netrin-1 is typically known as a neural guidance cue, which has been implicated in pancreas development. Since regenerative, angiogenic and anti-inflammatory properties of Netrin-1 have been reported in multiple tissues, we have investigated the potential role of Netrin-1 in the endocrine islet and its implication in mice with high-fat diet (HFD)/streptozotocin (STZ)-induced diabetes. Effects of exogenous Netrin-1 on β-cell [Ca(2+)]i, cyclic AMP (cAMP) and insulin production were assessed in vitro The long-term impact of Netrin-1 treatment was then evaluated in HFD/STZ-induced diabetic mice by subcutaneous implantation of osmotic minipumps which release Netrin-1 in a sustained manner for 4 weeks. Immunostaining of pancreases of Netrin-1-treated and control animals were employed to examine islet morphology, vascularization and macrophage infiltration. Plasma insulin, glucagon and pro-inflammatory cytokine concentrations were quantified by ELISA. Expression of endogenous Netrin-1 was also assessed by PCR and immunohistochemistry. We observed a stimulatory effect of Netrin-1 on in vitro insulin secretion by promoting β-cell Ca(2+) influx and cAMP production. After 4-week continuous exposure, a hypoglycaemic property of Netrin-1 was demonstrated, which is probably attributable to improved β-cell function, shown as increased insulin content and preproinsulin mRNA expression. Enhanced islet vascularization, reduced islet macrophage infiltration and ameliorated systemic inflammation were detected from HFD/STZ-induced diabetic mice after Netrin-1 administration. We propose a dual action of Netrin-1 in islets during pathophysiological hyperglycaemia: by maintaining insulin secretion while attenuating inflammation.
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21
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Mediero A, Wilder T, Ramkhelawon B, Moore KJ, Cronstein BN. Netrin-1 and its receptor Unc5b are novel targets for the treatment of inflammatory arthritis. FASEB J 2016; 30:3835-3844. [PMID: 27502509 DOI: 10.1096/fj.201600615r] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 07/27/2016] [Indexed: 12/20/2022]
Abstract
Rheumatoid arthritis is an autoimmune disease that is characterized by chronic inflammation and destruction of joints. Netrin-1, a chemorepulsant, laminin-like matrix protein, promotes inflammation by preventing macrophage egress from inflamed sites and is required for osteoclast differentiation. We asked whether blockade of Netrin-1 or its receptors [Unc5b and DCC (deleted in colorectal carcinoma)] may be useful therapeutic targets for treatment of inflammatory arthritis. Arthritis was induced in 8-wk-old C57Bl/6 mice by intraperitoneal injection of K/BxN serum. Murine monoclonal antibodies against Netrin-1, Unc5b, or DCC (10 µg/mouse) were injected weekly for 4 wk (n = 10). Paw swelling and thickness were assessed and following euthanasia 2-4 wk after serum transfer, paws were prepared for micro-computed tomography and histology. Paw inflammation was maximal 2 wk after injection. Anti-Netrin-1 or anti-Unc5b, but not anti-DCC, antibodies significantly reduced paw inflammation (clinical score: 9.8 ± 0.8, 10.4 ± 0.9, and 13.5 ± 0.5, respectively vs 16 ± 0 for control; P < 0.001). Micro-computed tomography showed bony erosions in untreated or anti-DCC-treated mice, whereas there were no erosions in anti-Netrin-1/anti-Unc5b-treated-animals. Tartrate-resistant acid phosphatase staining demonstrated a marked decrease in osteoclasts in anti-Netrin-1/anti-Unc5b-treated animals. Immunofluorescence staining revealed a decrease in cathepsin K+ and CD68+ cells in anti-Netrin-1/anti-Unc5b-treated animals. Blockade of Netrin-1/Unc5b by monoclonal antibodies prevents bone destruction and reduces the severity of K/BxN serum transfer-induced arthritis. Netrin-1 may be a novel therapeutic target for treatment of inflammatory bone destruction.-Mediero, A., Wilder, T., Ramkhelawon, B., Moore, K. J., Cronstein, B. N. Netrin-1 and its receptor Unc5b are novel targets for the treatment of inflammatory arthritis.
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Affiliation(s)
- Aránzazu Mediero
- Bone and Joint Research Unit, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz, Universidad Autónoma de Madrid, Madrid, Spain.,Division of Translational Medicine, Department of Medicine, New York University School of Medicine, New York, New York, USA; and
| | - Tuere Wilder
- Division of Translational Medicine, Department of Medicine, New York University School of Medicine, New York, New York, USA; and
| | - Bhama Ramkhelawon
- Leon H. Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | - Kathryn J Moore
- Leon H. Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | - Bruce N Cronstein
- Division of Translational Medicine, Department of Medicine, New York University School of Medicine, New York, New York, USA; and
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22
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Boneschansker L, Nakayama H, Eisenga M, Wedel J, Klagsbrun M, Irimia D, Briscoe DM. Netrin-1 Augments Chemokinesis in CD4+ T Cells In Vitro and Elicits a Proinflammatory Response In Vivo. THE JOURNAL OF IMMUNOLOGY 2016; 197:1389-98. [PMID: 27430720 DOI: 10.4049/jimmunol.1502432] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 06/14/2016] [Indexed: 11/19/2022]
Abstract
Netrin-1 is a neuronal guidance cue that regulates cellular activation, migration, and cytoskeleton rearrangement in multiple cell types. It is a chemotropic protein that is expressed within tissues and elicits both attractive and repulsive migratory responses. Netrin-1 has recently been found to modulate the immune response via the inhibition of neutrophil and macrophage migration. However, the ability of Netrin-1 to interact with lymphocytes and its in-depth effects on leukocyte migration are poorly understood. In this study, we profiled the mRNA and protein expression of known Netrin-1 receptors on human CD4(+) T cells. Neogenin, uncoordinated-5 (UNC5)A, and UNC5B were expressed at low levels in unstimulated cells, but they increased following mitogen-dependent activation. By immunofluorescence, we observed a cytoplasmic staining pattern of neogenin and UNC5A/B that also increased following activation. Using a novel microfluidic assay, we found that Netrin-1 stimulated bidirectional migration and enhanced the size of migratory subpopulations of mitogen-activated CD4(+) T cells, but it had no demonstrable effects on the migration of purified CD4(+)CD25(+)CD127(dim) T regulatory cells. Furthermore, using a short hairpin RNA knockdown approach, we observed that the promigratory effects of Netrin-1 on T effectors is dependent on its interactions with neogenin. In the humanized SCID mouse, local injection of Netrin-1 into skin enhanced inflammation and the number of neogenin-expressing CD3(+) T cell infiltrates. Neogenin was also observed on CD3(+) T cell infiltrates within human cardiac allograft biopsies with evidence of rejection. Collectively, our findings demonstrate that Netrin-1/neogenin interactions augment CD4(+) T cell chemokinesis and promote cellular infiltration in association with acute inflammation in vivo.
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Affiliation(s)
- Leo Boneschansker
- Transplant Research Program, Division of Nephrology, Department of Medicine, Boston Children's Hospital, Boston, MA 02115; Department of Pediatrics, Harvard Medical School, Boston, MA 02115; Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Shriners Hospitals for Children, Boston, MA 02114; and
| | - Hironao Nakayama
- Vascular Biology Program, Department of Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115
| | - Michele Eisenga
- Transplant Research Program, Division of Nephrology, Department of Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Johannes Wedel
- Transplant Research Program, Division of Nephrology, Department of Medicine, Boston Children's Hospital, Boston, MA 02115; Department of Pediatrics, Harvard Medical School, Boston, MA 02115
| | - Michael Klagsbrun
- Vascular Biology Program, Department of Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115
| | - Daniel Irimia
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Shriners Hospitals for Children, Boston, MA 02114; and
| | - David M Briscoe
- Transplant Research Program, Division of Nephrology, Department of Medicine, Boston Children's Hospital, Boston, MA 02115; Department of Pediatrics, Harvard Medical School, Boston, MA 02115;
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23
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Mediero A, Ramkhelawon B, Wilder T, Purdue PE, Goldring SR, Dewan MZ, Loomis C, Moore KJ, Cronstein BN. Netrin-1 is highly expressed and required in inflammatory infiltrates in wear particle-induced osteolysis. Ann Rheum Dis 2015; 75:1706-13. [PMID: 26452536 DOI: 10.1136/annrheumdis-2015-207593] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 09/20/2015] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Netrin-1 is a chemorepulsant and matrix protein expressed during and required for osteoclast differentiation, which also plays a role in inflammation by preventing macrophage egress. Because wear particle-induced osteolysis requires osteoclast-mediated destruction of bone, we hypothesised that blockade of Netrin-1 or Unc5b, a receptor for Netrin-1, may diminish this pathological condition. METHODS C57BL/6 mice, 6-8 weeks old, had 3 mg of ultrahigh-molecular-weight polyethylene particles implanted over the calvaria and then received 10 µg of monoclonal antibodies for Netrin-1 or its receptors, Unc5b and deleted in colon cancer (DCC), injected intraperitoneally on a weekly basis. After 2 weeks, micro-computed tomography and histology analysis were performed. Netrin-1 expression was analysed in human tissue obtained following primary prosthesis implantation or after prosthesis revision for peri-implant osteolysis and aseptic implant loosening. RESULTS Weekly injection of anti-Netrin-1 or anti-Unc5b-antibodies significantly reduced particle-induced bone pitting in calvaria exposed to wear particles (46±4% and 49±3% of control bone pitting, respectively, p<0.001) but anti-DCC antibody did not affect inflammatory osteolysis (80±7% of control bone pitting, p=ns). Anti-Netrin-1 or anti-Unc5b, but not anti-DCC, antibody treatment markedly reduced the inflammatory infiltrate and the number of tartrate resistance acid phosphatase (TRAP)-positive osteoclasts (7±1, 4±1 and 14±1 cells/high power field (hpf), respectively, vs 12±1 cells/hpf for control, p<0.001), with no significant changes in alkaline phosphatase-positive osteoblasts on bone-forming surfaces in any antibody-treated group. Netrin-1 immunostaining colocalised with CD68 staining for macrophages. The peri-implant tissues of patients undergoing prosthesis revision surgery showed an increase in Netrin-1 expression, whereas there was little Netrin-1 expression in soft tissues removed at the time of primary joint replacement. CONCLUSIONS These results demonstrate a unique role for Netrin-1 in osteoclast biology and inflammation and may be a novel target for prevention/treatment of inflammatory osteolysis.
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Affiliation(s)
- Aránzazu Mediero
- Division of Translational Medicine, Department of Medicine, NYU School of Medicine, New York, New York, USA
| | - Bhama Ramkhelawon
- Leon H. Charney Division of Cardiology, Department of Medicine, NYU School of Medicine, New York, New York, USA
| | - Tuere Wilder
- Division of Translational Medicine, Department of Medicine, NYU School of Medicine, New York, New York, USA
| | | | | | - M Zahidunnabi Dewan
- Office of Collaborative Sciences, NYU School of Medicine, New York, New York, USA
| | - Cynthia Loomis
- Office of Collaborative Sciences, NYU School of Medicine, New York, New York, USA Department of Pathology, NYU School of Medicine, New York, New York, USA
| | - Kathryn J Moore
- Leon H. Charney Division of Cardiology, Department of Medicine, NYU School of Medicine, New York, New York, USA
| | - Bruce N Cronstein
- Division of Translational Medicine, Department of Medicine, NYU School of Medicine, New York, New York, USA
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24
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Mediero A, Ramkhelawon B, Perez-Aso M, Moore KJ, Cronstein BN. Netrin-1 is a critical autocrine/paracrine factor for osteoclast differentiation. J Bone Miner Res 2015; 30:837-54. [PMID: 25483983 PMCID: PMC4689304 DOI: 10.1002/jbmr.2421] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 11/13/2014] [Accepted: 11/23/2014] [Indexed: 12/14/2022]
Abstract
Bone metabolism is a vital process that involves resorption by osteoclasts and formation by osteoblasts, which is closely regulated by immune cells. The neuronal guidance protein Netrin-1 regulates immune cell migration and inflammatory reactions, but its role in bone metabolism is unknown. During osteoclast differentiation, osteoclast precursors increase expression of Netrin-1 and its receptor Unc5b. Netrin-1 binds, in an autocrine and paracrine manner, to Unc5b to promote osteoclast differentiation in vitro, and absence of Netrin-1 or antibody-mediated blockade of Netrin-1 or Unc5b prevents osteoclast differentiation of both murine and human precursors. We confirmed the functional relationship of Netrin-1 in osteoclast differentiation in vivo using Netrin-1-deficient (Ntn1(-/-) ) or wild-type (WT) bone marrow transplanted mice. Notably, Ntn1(-/-) chimeras have markedly diminished osteoclasts, as well as increased cortical and trabecular bone density and volume compared with WT mice. Mechanistic studies revealed that Netrin-1 regulates osteoclast differentiation by altering cytoskeletal assembly. Netrin-1 increases regulator of Rho-GEF subfamily (LARG) and repulsive guidance molecule (RGMa) association with Unc5b, which increases expression and activation of cytoskeletal regulators RhoA and focal adhesion kinase (FAK). Netrin-1 and its receptor Unc5b likely play a role in fusion of osteoclast precursors because Netrin-1 and DC-STAMP are tightly linked. These results identify Netrin-1 as a key regulator of osteoclast differentiation that may be a new target for bone therapies.
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Affiliation(s)
- Aránzazu Mediero
- Division of Translational Medicine, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Bhama Ramkhelawon
- Leon H Charney Division of Cardiology, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Miguel Perez-Aso
- Division of Translational Medicine, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Kathryn J Moore
- Leon H Charney Division of Cardiology, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Bruce N Cronstein
- Division of Translational Medicine, Department of Medicine, NYU School of Medicine, New York, NY, USA
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25
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Ke T, Wu Y, Li L, Liu Y, Yao X, Zhang J, Kong D, Li C. Netrin-1 ameliorates myocardial infarction-induced myocardial injury: mechanisms of action in rats and diabetic mice. Hum Gene Ther 2014; 25:787-97. [PMID: 24827071 DOI: 10.1089/hum.2014.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Netrin-1 is typically known as a neuronal guidance factor. Studies have reported the proangiogenic, antiapoptotic, and antiinflammatory properties of Netrin-1. A critical role for Netrin-1 in ischemic organ damage, myocardial infarction (MI) in particular, has also been demonstrated, making Netrin-1 a potential therapeutic target for the treatment of cardiovascular diseases (CVDs). Mesenchymal stem cells (MSCs) have shown promising therapeutic efficacy in preclinical studies. However, limited clinical success was observed, mainly due to poor MSC survival. Given the reported beneficial impact of Netrin-1 in tissue repair and cell survival, we examined the effects of Netrin-1 in MSC therapy against MI-induced ischemic cardiac injury in rats and type 2 diabetic (T2D) mice. MSCs were isolated and Netrin-1-expressing MSCs were obtained by transduction with a Netrin-1-encoding retroviral vector. The Netrin-1-MSCs were then delivered intramyocardially to the infarct sites of rats and T2D mice with MI. Thirty days after MSC implantation, changes at the infarct area, level of collagen deposition, and cardiac hypertrophy were assessed. Molecular mechanisms underlying the effects of Netrin-1 were also investigated. Attenuated MI-induced myocardial dysfunction was observed after Netrin-1-MSC treatment. Protective effects of the Netrin-1-MSCs were attributable primarily to better MSC survival and migration, which is mediated by Netrin-1-induced phosphorylation of p44/42 mitogen-activated protein kinase. Netrin-1-stimulated nitric oxide production was also responsible, which could promote neovessel formation and progenitor cell mobilization in vivo. We report a protective role for Netrin-1 against MI-induced ischemic injuries, reinstating its promising potential as a therapeutic target for CVDs and, more importantly, for patients with CVD with coexisting diabetes.
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Affiliation(s)
- Tingyu Ke
- 1 Department of Endocrinology, Second Affiliated Hospital, Kunming Medical University , Kunming 650101, Yunnan, China
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26
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Ding Q, Liao SJ, Yu J. Axon guidance factor netrin-1 and its receptors regulate angiogenesis after cerebral ischemia. Neurosci Bull 2014; 30:683-91. [PMID: 24875332 DOI: 10.1007/s12264-013-1441-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 01/11/2014] [Indexed: 12/17/2022] Open
Abstract
Neurogenesis and angiogenesis play important roles in functional recovery after ischemic stroke. When cerebral ischemia occurs, axon regeneration can compensate for the loss of apoptotic neurons in the ischemic area. The formation of new blood vessels ameliorates the local decrease in blood supply, enhancing the supply of oxygen and nutrients to newly-formed neurons. New blood vessels also act as a scaffold for the migration of neuroblasts to the infarct area after ischemic stroke. In light of this, researchers have been actively searching for methods to treat cerebral infarction. Netrins were first identified as a family of proteins that mediate axon guidance and direct axon migration during embryogenesis. Later studies have revealed other functions of this protein family. In this review, we focus on netrin-1, which has been shown to be involved in axon migration and angiogenesis, which are required for recovery after cerebral ischemia. Thus, therapies targeting netrin-1 may be useful for the treatment of ischemic stroke.
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Affiliation(s)
- Qiao Ding
- Department of Neurology, Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department, National Key Discipline, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
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27
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Recent advances in the investigation of pancreatic inflammation induced by large doses of basic amino acids in rodents. J Transl Med 2014; 94:138-49. [PMID: 24365745 DOI: 10.1038/labinvest.2013.143] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 11/13/2013] [Accepted: 11/19/2013] [Indexed: 12/16/2022] Open
Abstract
It has been known for approximately 30 years that large doses of the semi-essential basic amino acid L-arginine induce severe pancreatic inflammation in rats. Recently, it has been demonstrated that L-arginine can also induce pancreatitis in mice. Moreover, other basic amino acids like L-ornithine and L-lysine can cause exocrine pancreatic damage without affecting the endocrine parenchyma and the ducts in rats. The utilization of these noninvasive severe basic amino acid-induced pancreatitis models is becoming increasingly popular and appreciated as these models nicely reproduce most laboratory and morphological features of human pancreatitis. Consequently, the investigation of basic amino acid-induced pancreatitis may offer us a better understanding of the pathogenesis and possible treatment options of the human disease.
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28
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Matalka II, Mhaidat NM, Fatlawi LA. Antioxidant activity of simvastatin prevents L-arginine-induced acute toxicity of pancreas. INTERNATIONAL JOURNAL OF PHYSIOLOGY, PATHOPHYSIOLOGY AND PHARMACOLOGY 2013; 5:102-8. [PMID: 23750308 PMCID: PMC3669738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 04/26/2013] [Indexed: 06/02/2023]
Abstract
L-arginine is a semi-essential amino acid that found naturally in food. It has been shown that administration of large doses of L-arginine can induce acute pancreatitis. In the present study, we evaluated if simvastatin, a 3-hydroxy-methylglutaryl coenzyme A reductase (HMG-CoA reductase) inhibitor, might prevent acute pancreatitis induced by L-arginine. Thirty male Wistar rats were randomly allocated to five groups. Groups were: DMSO, saline, simvastatin, L-arginine, and simvastatin with L-arginine. Twenty four hours after the last dose, rats were sacrificed and their blood was collected from heart for biochemical analysis. Pancreatic tissues were obtained for analysis of glutathione peroxidase (GPx), glutathione s-transferase (GST), lipid peroxide levels (MDA) and histology analysis was examined for pancreas. Results indicated that treatment with simvastatin significantly enhanced levels of GPx and GST and decreased lipid peroxide levels induced by L-arginine compared to the vehicle. Moreover, histopathological analysis further confirmed that administration of simvastatin relatively prevented pancreatic acinar cell damage compared to those animals received L-arginine alone. These findings pointed out the protective role of simvastatin against acute pancreatitis induced by high doses of L-arginine.
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Affiliation(s)
- Ismail I Matalka
- Department of pathology, Jordan University of Science and Technology Irbid 22110, Jordan
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