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Kuntz S, Kunz C, Borsch C, Hill D, Morrin S, Buck R, Rudloff S. Influence of microbially fermented 2´-fucosyllactose on neuronal-like cell activity in an in vitro co-culture system. Front Nutr 2024; 11:1351433. [PMID: 38389793 PMCID: PMC10881714 DOI: 10.3389/fnut.2024.1351433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 01/18/2024] [Indexed: 02/24/2024] Open
Abstract
Scope 2´-Fucosyllactose (2´-FL), the most abundant oligosaccharide in human milk, plays an important role in numerous biological functions, including improved learning. It is not clear, however, whether 2´-FL or a cleavage product could influence neuronal cell activity. Thus, we investigated the effects of 2´-FL, its monosaccharide fucose (Fuc), and microbial fermented 2´-FL and Fuc on the parameters of neuronal cell activity in an intestinal-neuronal transwell co-culture system in vitro. Methods Native 13C-labeled 2´-FL and 13C-Fuc or their metabolites, fermented with Bifidobacterium (B.) longum ssp. infantis and B. breve, which were taken from the lag-, log- and stationary (stat-) growth phases of batch cultures, were applied to the apical compartment of the co-culture system with Caco-2 cells representing the intestinal layer and all-trans-retinoic acid-differentiated SH-SY5Y (SH-SY5YATRA) cells mimicking neuronal-like cells. After 3 h of incubation, the culture medium in the basal compartment was monitored for 13C enrichment by using elemental analysis isotope-ratio mass spectrometry (EA-IRMS) and effects on cell viability, plasma, and mitochondrial membrane potential. The neurotransmitter activation (BDNF, GABA, choline, and glutamate) of SH-SY5YATRA cells was also determined. Furthermore, these effects were also measured by the direct application of 13C-2´-FL and 13C-Fuc to SH-SY5YATRA cells. Results While no effects on neuronal-like cell activities were observed after intact 2´-FL or Fuc was incubated with SH-SY5YATRA cells, supernatants from the stat-growth phase of 2´-FL, fermented by B. longum ssp. infantis alone and together with B. breve, significantly induced BDNF release from SH-SY5YATRA cells. No such effects were found for 2´-FL, Fuc, or their fermentation products from B. breve. The BDNF release occurred from an enhanced vesicular release, which was confirmed by the use of the Ca2+-channel blocker verapamil. Concomitant with this event, 13C enrichment was also observed in the basal compartment when supernatants from the stat-growth phase of fermentation by B. longum ssp. infantis alone or together with B. breve were used. Conclusion The results obtained in this study suggest that microbial products of 2´-FL rather than the oligosaccharide itself may influence neuronal cell activities.
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Affiliation(s)
- Sabine Kuntz
- Department of Nutritional Science, Justus Liebig University Giessen, Giessen, Germany
| | - Clemens Kunz
- Department of Nutritional Science, Justus Liebig University Giessen, Giessen, Germany
| | - Christian Borsch
- Department of Nutritional Science, Justus Liebig University Giessen, Giessen, Germany
| | - David Hill
- Abbott, Nutrition Division, Columbus, OH, United States
| | - Sinéad Morrin
- Abbott, Nutrition Division, Columbus, OH, United States
| | - Rachael Buck
- Abbott, Nutrition Division, Columbus, OH, United States
| | - Silvia Rudloff
- Department of Nutritional Science, Justus Liebig University Giessen, Giessen, Germany
- Department of Pediatrics, Justus Liebig University Giessen, Giessen, Germany
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Sreter KB, Popovic-Grle S, Lampalo M, Konjevod M, Tudor L, Nikolac Perkovic M, Jukic I, Bingulac-Popovic J, Safic Stanic H, Markeljevic J, Pivac N, Svob Strac D. Plasma Brain-Derived Neurotrophic Factor (BDNF) Concentration and BDNF/ TrkB Gene Polymorphisms in Croatian Adults with Asthma. J Pers Med 2020; 10:jpm10040189. [PMID: 33114368 PMCID: PMC7712770 DOI: 10.3390/jpm10040189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/18/2020] [Accepted: 10/22/2020] [Indexed: 12/14/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) and its tropomyosin-related kinase B (TrkB) receptor might contribute to normal lung functioning and immune responses; however, their role in asthma remains unclear. Plasma BDNF concentrations, as well as BDNF and NTRK2 (TrkB gene) polymorphisms, were investigated in 120 asthma patients and 120 healthy individuals using enzyme-linked immunosorbent assay and polymerase chain reaction, respectively. The genotype and allele frequencies of BDNF Val66Met (rs6265) and NTRK2 rs1439050 polymorphisms did not differ between healthy individuals and asthma patients, nor between patients grouped according to severity or different asthma phenotypes. Although plasma BDNF concentrations were higher among healthy subjects carrying the BDNF Val66Met GG genotype compared to the A allele carriers, such differences were not detected in asthma patients, suggesting the influences of other factors. Plasma BDNF concentration was not affected by NTRK2 rs1439050 polymorphism. Asthma patients had higher plasma BDNF concentrations than control subjects; however, no differences were found between patients subdivided according to asthma severity, or Type-2, allergic, and eosinophilic asthma. Higher plasma BDNF levels were observed in asthma patients with aspirin sensitivity and aspirin-exacerbated respiratory disease. These results suggest that plasma BDNF may serve as a potential peripheral biomarker for asthma, particularly asthma with aspirin sensitivity.
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Affiliation(s)
- Katherina B. Sreter
- Department of Clinical Immunology, Pulmonology and Rheumatology, University Hospital Centre “Sestre Milosrdnice”, 10000 Zagreb, Croatia; (K.B.S.); (J.M.)
| | - Sanja Popovic-Grle
- Clinic for Lung Diseases Jordanovac, University Hospital Centre Zagreb, 10000 Zagreb, Croatia; (S.P.-G.); (M.L.)
- School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Marina Lampalo
- Clinic for Lung Diseases Jordanovac, University Hospital Centre Zagreb, 10000 Zagreb, Croatia; (S.P.-G.); (M.L.)
| | - Marcela Konjevod
- Division of Molecular Medicine, Rudjer Boskovic Institute, 10000 Zagreb, Croatia; (M.K.); (L.T.); (M.N.P.); (N.P.)
| | - Lucija Tudor
- Division of Molecular Medicine, Rudjer Boskovic Institute, 10000 Zagreb, Croatia; (M.K.); (L.T.); (M.N.P.); (N.P.)
| | - Matea Nikolac Perkovic
- Division of Molecular Medicine, Rudjer Boskovic Institute, 10000 Zagreb, Croatia; (M.K.); (L.T.); (M.N.P.); (N.P.)
| | - Irena Jukic
- Croatian Institute of Transfusion Medicine, 10000 Zagreb, Croatia; (I.J.); (J.B.-P.); (H.S.S.)
- Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Jasna Bingulac-Popovic
- Croatian Institute of Transfusion Medicine, 10000 Zagreb, Croatia; (I.J.); (J.B.-P.); (H.S.S.)
| | - Hana Safic Stanic
- Croatian Institute of Transfusion Medicine, 10000 Zagreb, Croatia; (I.J.); (J.B.-P.); (H.S.S.)
| | - Jasenka Markeljevic
- Department of Clinical Immunology, Pulmonology and Rheumatology, University Hospital Centre “Sestre Milosrdnice”, 10000 Zagreb, Croatia; (K.B.S.); (J.M.)
- School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Nela Pivac
- Division of Molecular Medicine, Rudjer Boskovic Institute, 10000 Zagreb, Croatia; (M.K.); (L.T.); (M.N.P.); (N.P.)
| | - Dubravka Svob Strac
- Division of Molecular Medicine, Rudjer Boskovic Institute, 10000 Zagreb, Croatia; (M.K.); (L.T.); (M.N.P.); (N.P.)
- Correspondence: ; Tel.: +385-1-457-1365
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Xu Z, Shi WH, Xu LB, Shao MF, Chen ZP, Zhu GC, Hou Q. Resident Microglia Activate before Peripheral Monocyte Infiltration and p75NTR Blockade Reduces Microglial Activation and Early Brain Injury after Subarachnoid Hemorrhage. ACS Chem Neurosci 2019; 10:412-423. [PMID: 30117729 DOI: 10.1021/acschemneuro.8b00298] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Early brain injury (EBI) after aneurysmal subarachnoid hemorrhage (SAH) contributes to high morbidity and mortality. Although it is well recognized that acute neuroinflammation reaction is one of the most important triggers of EBI, pharmacotherapy proved to be clinically effective against the initiating of neuroinflammation after SAH is lacking. The resident microglia and infiltrated peripheral monocyte are two main types of immune cells in central nervous system (CNS) and control the inflammation process in brain after SAH. But the time course and relative contributions of these two immune cell activations after SAH are unknown. The p75 neurotrophin receptor (p75NTR), member of TNF receptor superfamily, expresses on infiltrated peripheral monocytes and suppresses their proinflammatory action after brain insults. But the p75NTR expression on resident microglia in vivo is rarely explored and their function keeps elusive. Therefore, we designed this study to investigate the time course of resident microglia activation and peripheral monocyte infiltration, as well as the microglial expression of p75NTR by using CX3C-chemokine receptor 1 (Cx3cr1) and chemokine receptor 2 (Ccr2) double transgenic mice (Cx3cr1GFP/+Ccr2RFP/+) after SAH. The results showed activated microglia was observed in cortex as early as 24 h and further increased at 48 and 72 h post SAH, while the infiltrated monocyte was not found until 72h. In addition, activated microglia expressed p75NTR acutely and p75NTR specific antagonist TAT-Pep5 significantly reduced microglia activation, neuroinflammation and EBI from 24 to 72 h. Together, these data suggest that the early neuroinflammation reaction might be initiated and intensified mainly by resident microglia rather than infiltrated monocyte at least in the first 48 h after SAH and p75NTR blockading by TAT-Pep5P might alleviate EBI through mediating microglial activation.
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Affiliation(s)
- Zhen Xu
- Department of Neurosurgery , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
| | - Wei-Hua Shi
- Department of Neurosurgery , Affiliated Hospital of Nantong University , 20 Xisi Road , Nantong 226001 , China
| | - Long-Biao Xu
- Department of Neurosurgery , Zhuji People's Hospital , 9 Jianmin Lane , Zhuji 311800 , China
| | - Min-Feng Shao
- Department of Nephrology , First People's Hospital of Yuhang District , No. 369 Yingbin Road , Linping, Yuhang, Hangzhou 311100 , China
| | - Zu-Peng Chen
- Department of Neurosurgery , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
| | - Guo-Chong Zhu
- Department of Neurosurgery , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
| | - Qun Hou
- Department of Neurology , First affiliated Hospital of Zhejiang Chinese Medicine University , 54 Youdian Lane , Hangzhou 310006 , China
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Zhu MC, Xiong P, Li GL, Zhu M. Could lung cancer exosomes induce apoptosis of natural killer cells through the p75NTR–proNGF–sortilin axis? Med Hypotheses 2017; 108:151-153. [DOI: 10.1016/j.mehy.2017.09.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 09/04/2017] [Indexed: 01/08/2023]
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Price EA, Krasowska-Zoladek A, Nanda KK, Stachel SJ, Henze DA. Development of a pharmacodynamic biomarker to measure target engagement from inhibition of the NGF-TrkA pathway. J Neurosci Methods 2017; 282:34-42. [PMID: 28279735 DOI: 10.1016/j.jneumeth.2017.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 02/02/2017] [Accepted: 03/02/2017] [Indexed: 10/20/2022]
Abstract
BACKGROUND NGF signaling through TrkA triggers pathways involved in a wide range of biological effects. Clinical trials targeting either NGF or TrkA are ongoing to treat various diseases in the areas of oncology, neuroscience, and for pain, but there is no described measure of target engagement of TrkA in these studies. NEW METHOD We have developed custom ELISA assays to measure NGF-induced phosphorylation of TrkA specific for rodent and human receptors. Optimized tissue processing methods allow for detection in both the brain and in skin. In addition, TrkB and TrkC assays have been in established to evaluate selectivity against other neurotrophin receptors. RESULTS In a preclinical NGF-induced pain model, we show that pre-dosing with a TrkA inhibitor prevents phosphorylation of TrkA in the skin at a dose that is efficacious in reversal of thermal hypersensitivity. In addition, we show data in non-human primate and human skin supporting the potential use of this approach to enable translational target engagement. Comparison with existing methods: Existing methods involve animal models expressing TrkA tumors or injection of over-expressing TrkA recombinant cells into animals. Our method can measure target engagement in both normal and disease tissues in preclinical animal models and human skin. CONCLUSIONS We have developed methods to assess target engagement for drug programs aimed at disrupting NGF-induced TrkA signaling. This includes preclinical determination of selectivity against other neurotrophin receptors and estimation of functional peripheral restriction. Preliminary data supports this method can be translated into a clinical pharmacodynamic readout using human skin biopsies.
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Affiliation(s)
- Eric A Price
- Departments of Neuroscience Pain and Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., Inc, West Point, PA 19486, USA.
| | - Alicja Krasowska-Zoladek
- Departments of Neuroscience Pain and Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., Inc, West Point, PA 19486, USA
| | - Kausik K Nanda
- Departments of Neuroscience Pain and Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., Inc, West Point, PA 19486, USA
| | - Shawn J Stachel
- Departments of Neuroscience Pain and Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., Inc, West Point, PA 19486, USA
| | - Darrell A Henze
- Departments of Neuroscience Pain and Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., Inc, West Point, PA 19486, USA
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Bowling H, Bhattacharya A, Klann E, Chao MV. Deconstructing brain-derived neurotrophic factor actions in adult brain circuits to bridge an existing informational gap in neuro-cell biology. Neural Regen Res 2016; 11:363-7. [PMID: 27127458 PMCID: PMC4828984 DOI: 10.4103/1673-5374.179031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) plays an important role in neurodevelopment, synaptic plasticity, learning and memory, and in preventing neurodegeneration. Despite decades of investigations into downstream signaling cascades and changes in cellular processes, the mechanisms of how BDNF reshapes circuits in vivo remain unclear. This informational gap partly arises from the fact that the bulk of studies into the molecular actions of BDNF have been performed in dissociated neuronal cultures, while the majority of studies on synaptic plasticity, learning and memory were performed in acute brain slices or in vivo. A recent study by Bowling-Bhattacharya et al., measured the proteomic changes in acute adult hippocampal slices following treatment and reported changes in proteins of neuronal and non-neuronal origin that may in concert modulate synaptic release and secretion in the slice. In this paper, we place these findings into the context of existing literature and discuss how they impact our understanding of how BDNF can reshape the brain.
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Affiliation(s)
- Heather Bowling
- Center for Neural Science, New York University, New York, NY, USA
| | - Aditi Bhattacharya
- Center for Brain Development and Repair, Institute for Stem Cell Biology and Regenerative Medicine, Bangalore, India
| | - Eric Klann
- Center for Neural Science, New York University, New York, NY, USA
| | - Moses V Chao
- Departments of Cell Biology, Physiology, and Neuroscience and Psychiatry, Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA
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Lee S, Mattingly A, Lin A, Sacramento J, Mannent L, Castel MN, Canolle B, Delbary-Gossart S, Ferzaz B, Morganti JM, Rosi S, Ferguson AR, Manley GT, Bresnahan JC, Beattie MS. A novel antagonist of p75NTR reduces peripheral expansion and CNS trafficking of pro-inflammatory monocytes and spares function after traumatic brain injury. J Neuroinflammation 2016; 13:88. [PMID: 27102880 PMCID: PMC4840857 DOI: 10.1186/s12974-016-0544-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 04/10/2016] [Indexed: 12/17/2022] Open
Abstract
Background Traumatic brain injury (TBI) results in long-term neurological deficits, which may be mediated in part by pro-inflammatory responses in both the injured brain and the circulation. Inflammation may be involved in the subsequent development of neurodegenerative diseases and post-injury seizures. The p75 neurotrophin receptor (p75NTR) has multiple biological functions, affecting cell survival, apoptotic cell death, axonal growth, and degeneration in pathological conditions. We recently found that EVT901, a novel piperazine derivative that inhibits p75NTR oligomerization, is neuroprotective, reduces microglial activation, and improves outcomes in two models of TBI in rats. Since TBI elicits both CNS and peripheral inflammation, we used a mouse model of TBI to examine whether EVT901 would affect peripheral immune responses and trafficking to the injured brain. Methods Cortical contusion injury (CCI)-TBI of the sensory/motor cortex was induced in C57Bl/6 wild-type mice and CCR2+/RFP heterozygote transgenic mice, followed by treatment with EVT901, a selective antagonist of p75NTR, or vehicle by i.p. injection at 4 h after injury and then daily for 7 days. Brain and blood were collected at 1 and 6 weeks after injury. Flow cytometry and histological analysis were used to determine peripheral immune responses and trafficking of peripheral immune cells into the lesion site at 1 and 6 weeks after TBI. A battery of behavioral tests administered over 6 weeks was used to evaluate neurological outcome, and stereological estimation of brain tissue volume at 6 weeks was used to assess tissue damage. Finally, multivariate principal components analysis (PCA) was used to evaluate the relationships between inflammatory events, EVT901 treatment, and neurological outcomes. Results EVT901 is neuroprotective in mouse CCI-TBI and dramatically reduced the early trafficking of CCR2+ and pro-inflammatory monocytes into the lesion site. EVT901 reduced the number of CD45highCD11b+ and CD45highF4/80+ cells in the injured brain at 6 weeks. TBI produced a significant increase in peripheral pro-inflammatory monocytes (Ly6Cint-high pro-inflammatory monocytes), and this peripheral effect was also blocked by EVT901 treatment. Further, we found that blocking p75NTR with EVT901 reduces the expansion of pro-inflammatory monocytes, and their response to LPS in vitro, supporting the idea that there is a peripheral EVT901 effect that blunts inflammation. Further, 1 week of EVT901 blocks the expansion of pro-inflammatory monocytes in the circulation after TBI, reduces the number of multiple subsets of pro-inflammatory monocytes that enter the injury site at 1 and 6 weeks post-injury, and is neuroprotective, as it was in the rat. Conclusions Together, these findings suggest that p75NTR signaling participates in the production of the peripheral pro-inflammatory response to CNS injury and implicates p75NTR as a part of the pro-inflammatory cascade. Thus, the neuroprotective effects of p75NTR antagonists might be due to a combination of central and peripheral effects, and p75NTR may play a role in the production of peripheral inflammation in addition to its many other biological roles. Thus, p75NTR may be a therapeutic target in human TBI. Electronic supplementary material The online version of this article (doi:10.1186/s12974-016-0544-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sangmi Lee
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA
| | - Aaron Mattingly
- Biomedical Science Graduate Program, University of California at San Francisco, San Francisco, CA, 94143-0899, USA
| | - Amity Lin
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA
| | - Jeffrey Sacramento
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA
| | - Leda Mannent
- Early to Candidate, Sanofi Research, 195 route d'Espagne, Chilly-Mazarin, France
| | - Marie-Noelle Castel
- Early to Candidate, Sanofi Research, 195 route d'Espagne, Chilly-Mazarin, France
| | - Benoit Canolle
- Early to Candidate, Sanofi Research, 195 route d'Espagne, Chilly-Mazarin, France
| | | | - Badia Ferzaz
- Early to Candidate, Sanofi Research, 195 route d'Espagne, Chilly-Mazarin, France
| | - Josh M Morganti
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA
| | - Susanna Rosi
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA.,Biomedical Science Graduate Program, University of California at San Francisco, San Francisco, CA, 94143-0899, USA
| | - Adam R Ferguson
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA.,Biomedical Science Graduate Program, University of California at San Francisco, San Francisco, CA, 94143-0899, USA
| | - Geoffrey T Manley
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA
| | - Jacqueline C Bresnahan
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA
| | - Michael S Beattie
- Department of Neurological Surgery, Brain and Spinal Injury Center, University of California at San Francisco, Box 0899, 1001 Potrero Ave, Bldg 1, Rm 101, San Francisco, CA, 94143-0899, USA. .,Biomedical Science Graduate Program, University of California at San Francisco, San Francisco, CA, 94143-0899, USA.
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Seidel MF, Lane NE. Control of arthritis pain with anti-nerve-growth factor: risk and benefit. Curr Rheumatol Rep 2013; 14:583-8. [PMID: 22948388 DOI: 10.1007/s11926-012-0289-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Arthritis is characterized by pain and inflammation. Recently, attention has been focused on nerve-growth factor (NGF), a neurotrophin that is a key regulator of peripheral nociception because it mediates overexpression of proinflammatory neuron-derived molecules such as substance P, serotonin, and calcitonin gene-related peptide. Antibodies have been generated for NGF and its receptor that are effective in reducing pain in preclinical pain models, and clinical trials in patients with advanced knee and hip osteoarthritis and low-back pain. Results show pain reduction is rapid and sustained. Adverse events with anti-NGF included transient paraesthesia and edema, rapidly progressive OA, and, in a small number of patients treated with both anti-NGF and nonsteroidal anti-inflammatory drugs, osteonecrosis. Inhibition of the NGF-stimulated nociceptive pathway seems to be effective; however, the adverse effects require further investigation.
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Affiliation(s)
- Matthias F Seidel
- Section of Rheumatology, Medizinische Klinik und Poliklinik III, University Hospital, Sigmund-Freud-Strasse 25, 53127, Bonn, Germany.
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He T, Katusic ZS. Brain-derived neurotrophic factor increases expression of MnSOD in human circulating angiogenic cells. Microvasc Res 2012; 83:366-71. [PMID: 22261313 DOI: 10.1016/j.mvr.2012.01.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 12/12/2011] [Accepted: 01/03/2012] [Indexed: 02/05/2023]
Abstract
Existing evidence suggests that brain-derived neurotrophic factor (BDNF) promotes survival and proliferation of endothelial cells, stimulates mobilization of hematopoietic progenitors, and induces angiogenesis in ischemic tissues. However, the mechanisms underlying vascular protective function of BDNF are poorly understood. We hypothesized that BDNF increases antioxidant capacity of circulating angiogenic cells. Human mononuclear cells were isolated from peripheral blood of 30 healthy male volunteers (48±2 years old), and cultured in endothelial growth medium-2 for 4-5 days. The attached cells (so called early endothelial progenitor cells [early EPCs], or circulating angiogenic cells) expressed BDNF receptors, tropomyosin-related kinase B and p75 neurotrophin receptor. Treatment of early EPCs with recombinant human BDNF for 24 h significantly increased manganese superoxide dismutase (MnSOD) expression, but had no effect on expression of other antioxidant enzymes including copper zinc SOD (CuZnSOD), catalase, and glutathione peroxidase-1. BDNF stimulated phosphorylation of IκB kinase (IKK)α/β and stress-activated protein kinase/c-Jun N-terminal kinase (SAPK/JNK); however it did not activate p38, Erk, or AKT. Treatment with nuclear factor κB inhibitor, PDTC, or JNK inhibitor, SP600125, attenuated BDNF-augmented MnSOD protein expression. BDNF treatment inhibited apoptosis induced by a superoxide anion generator LY83583, and serum starvation-induced cell detachment. These findings suggest that BDNF protects EPCs by increasing expression of MnSOD thereby enhancing their antioxidant capacity.
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Affiliation(s)
- Tongrong He
- Department of Anesthesiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
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Li L, Shui QX, Zhao ZY, Zhu XD, Bao WQ. Dynamic changes of TrkB gene expression in Streptococcus pneumoniae meningitis after treatment with antibiotics and dexamethasone. World J Pediatr 2011; 7:250-6. [PMID: 21603940 DOI: 10.1007/s12519-011-0285-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2010] [Accepted: 01/18/2011] [Indexed: 10/18/2022]
Abstract
BACKGROUND Although more and more new potent antibiotics have been used, the incidence of neurological sequelae of Streptococcus pneumoniae meningitis has not improved in children over the last decade. The expression of TrkB mRNA, a receptor of brain-derived neurotrophic factor, is associated with the incidence of neurological sequelae of Streptococcus pneumoniae meningitis. METHODS Rats of 3 weeks old were used to construct a model of Streptococcus pneumoniae meningitis and served as normal controls. They were administered with antibiotics or antibiotics plus dexamethasone, respectively. The expression of the TrkB gene was detected in the brain by in situ hybridization. RESULTS In the brains of Streptococcus pneumoniae inoculated rats, TrkB mRNA was significantly up-regulated after inoculation for 24 hours, and then down-regulated in a dose-dependent manner after treatment with antibiotics. This up-regulation was seen after treatment with antibiotics plus dexamethasone. TrkB mRNA expression was also observed in some infiltrating inflammatory cells. CONCLUSIONS The results of the study support the hypothesis that TrkB signal transduction pathways might play an important role in Streptococcus pneumoniae meningitis, probably by protecting the brain from damage. The role of TrkB might be weakened after the treatment with antibiotics. Our findings suggest that targeting TrkB receptors might be a rational strategy for prevention of neurological sequelae caused by Streptococcus pneumoniae meningitis.
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Affiliation(s)
- Ling Li
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China.
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Hahn WH, Suh JS, Cho BS. Linkage and association study of neurotrophins and their receptors as novel susceptibility genes for childhood IgA nephropathy. Pediatr Res 2011; 69:299-305. [PMID: 21178826 DOI: 10.1203/pdr.0b013e31820b9365] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Neurotrophins (NTs) and their receptors (NTRs) are known to be important for pathogenesis of various inflammatory diseases that occur in not only neuronal but also nonneuronal tissues, including kidney. Here, we investigated association between childhood IgA nephropathy (IgAN) and single nucleotide polymorphisms (SNPs) of genes encoding NTs [nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF)] and NTRs [nerve growth factor receptor (NGFR) and neurotrophic tyrosine kinase receptor 1-3 (NTRK1-3)]. The genotyping data of 197 patients and 289 control subjects revealed significant association between NGF SNP rs11102930 and presence of IgAN. Patient subgroup analysis revealed that that the presence of nephrotic range proteinuria (>40 mg/m/h) was associated with rs6334 of NTRK1 and rs11030104, rs7103411, rs7103873, and rs6484320 of BDNF. Significant genotype differences were observed in podocyte foot process effacement for rs1187321 and rs1187323 of NTRK2. Furthermore, some SNPs showed significantly different genotype distribution between patients with or without pathologically advanced disease markers, specifically in rs6334 of NTRK1. Our results suggest that SNPs of NTs and NTRs are associated with susceptibility, pathological advancement, podocyte foot process effacement, and development of proteinuria in childhood IgAN.
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Affiliation(s)
- Won-Ho Hahn
- Department of Pediatrics, School of Medicine, Kyung Hee University, Seoul 130-702, Republic of Korea
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12
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Ralainirina N, Brons NHC, Ammerlaan W, Hoffmann C, Hentges F, Zimmer J. Mouse natural killer (NK) cells express the nerve growth factor receptor TrkA, which is dynamically regulated. PLoS One 2010; 5:e15053. [PMID: 21152021 PMCID: PMC2995740 DOI: 10.1371/journal.pone.0015053] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Accepted: 10/14/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Nerve growth factor (NGF) is a neurotrophin crucial for the development and survival of neurons. It also acts on cells of the immune system which express the NGF receptors TrkA and p75(NTR) and can be produced by them. However, mouse NK cells have not yet been studied in this context. METHODOLOGY/PRINCIPAL FINDINGS We used cell culture, flow cytometry, confocal microscopy and ELISA assays to investigate the expression of NGF receptors by NK cells and their secretion of NGF. We show that resting NK cells express TrkA and that the expression is different on NK cell subpopulations defined by the relative presence of CD27 and CD11b. Expression of TrkA is dramatically increased in IL-2-activated NK cells. The p75(NTR) is expressed only on a very low percentage of NK cells. Functionally, NGF moderately inhibits NK cell degranulation, but does not influence proliferation or cytokine production. NK cells do not produce NGF. CONCLUSIONS/SIGNIFICANCE We demonstrate for the first time that mouse NK cells express the NGF receptor TrkA and that this expression is dynamically regulated.
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Affiliation(s)
- Natacha Ralainirina
- Laboratory of Immunogenetics and Allergology, Centre de Recherche Public de la Santé (CRP-Santé), Luxembourg, Luxembourg
| | - Nicolaas H. C. Brons
- Core Facility Flow Cytometry, Centre de Recherche Public de la Santé (CRP-Santé), Luxembourg, Luxembourg
| | - Wim Ammerlaan
- Core Facility Flow Cytometry, Centre de Recherche Public de la Santé (CRP-Santé), Luxembourg, Luxembourg
| | - Céline Hoffmann
- Laboratory of Plant Molecular Biology, Centre de Recherche Public de la Santé (CRP-Santé), Luxembourg, Luxembourg
| | - François Hentges
- Laboratory of Immunogenetics and Allergology, Centre de Recherche Public de la Santé (CRP-Santé), Luxembourg, Luxembourg
| | - Jacques Zimmer
- Laboratory of Immunogenetics and Allergology, Centre de Recherche Public de la Santé (CRP-Santé), Luxembourg, Luxembourg
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13
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Prakash Y, Thompson MA, Meuchel L, Pabelick CM, Mantilla CB, Zaidi S, Martin RJ. Neurotrophins in lung health and disease. Expert Rev Respir Med 2010; 4:395-411. [PMID: 20524922 DOI: 10.1586/ers.10.29] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Neurotrophins (NTs) are a family of growth factors that are well-known in the nervous system. There is increasing recognition that NTs (nerve growth factor, brain-derived neurotrophic factor and NT3) and their receptors (high-affinity TrkA, TrkB and TrkC, and low-affinity p75NTR) are expressed in lung components including the nasal and bronchial epithelium, smooth muscle, nerves and immune cells. NT signaling may be important in normal lung development, developmental lung disease, allergy and inflammation (e.g., rhinitis, asthma), lung fibrosis and even lung cancer. In this review, we describe the current status of our understanding of NT signaling in the lung, with hopes of using aspects of the NT signaling pathway in the diagnosis and therapy of lung diseases.
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Affiliation(s)
- Ys Prakash
- Department of Anesthesiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
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14
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Rogers ML, Bailey S, Matusica D, Nicholson I, Muyderman H, Pagadala PC, Neet KE, Zola H, Macardle P, Rush RA. ProNGF mediates death of Natural Killer cells through activation of the p75NTR-sortilin complex. J Neuroimmunol 2010; 226:93-103. [PMID: 20547427 DOI: 10.1016/j.jneuroim.2010.05.040] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 05/12/2010] [Accepted: 05/19/2010] [Indexed: 12/30/2022]
Abstract
The common neurotrophin receptor P75NTR, its co-receptor sortilin and ligand proNGF, have not previously been investigated in Natural Killer (NK) cell function. We found freshly isolated NK cells express sortilin but not significant amounts of P75NTR unless exposed to interleukin-12 (IL-12), or cultured in serum free conditions, suggesting this receptor is sequestered. A second messenger associated with p75NTR, neurotrophin-receptor-interacting-MAGE-homologue (NRAGE) was identified in NK cells. Cleavage resistant proNGF123 killed NK cells in the presence of IL-12 after 20h and without IL-12 in serum free conditions at 48h. This was reduced by blocking sortilin with neurotensin. We conclude that proNGF induced apoptosis of NK cells may have important implications for limiting the innate immune response.
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Affiliation(s)
- Mary-Louise Rogers
- Department of Human Physiology, School of Medicine, Flinders University, GPO Box 2100 Adelaide 5001, Australia.
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15
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Basinski T, Ozdemir C, Sackesen C, Mantel PY, Barlan I, Akdis M, Jutel M, Akdis CA. Highlights in cellular and molecular mechanisms of allergic diseases. XXVth Congress of the European Academy of Allergology and Clinical Immunology in Vienna. Int Arch Allergy Immunol 2006; 142:91-8. [PMID: 17033194 DOI: 10.1159/000096113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
This year, the annual congress of the European Academy of Allergology and Clinical Immunology was held on 10-14 June in Vienna. More than 6,000 delegates, practicing bench or bedside work or both, gathered from over 50 countries throughout the world. Health professionals, basic scientists and fellows in training could choose between a variety of activities in plenary, main, educational and workshop sessions, highlights of the past year, pros and cons, and oral abstract and poster sessions, and met with experts. A total of 1,713 abstracts, 31 symposia, and 54 workshops were presented, ranging from basic science to clinical trials and modern treatment of allergic diseases. Here, we summarize the highlights of cellular and molecular mechanisms of allergic disease.
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Affiliation(s)
- T Basinski
- Swiss Institute of Allergy and Asthma Research, Davos, Switzerland
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Braun A, Tschernig T. Animal models of asthma: innovative methods of lung research and new pharmacological targets. ACTA ACUST UNITED AC 2006; 57 Suppl 2:3-4. [PMID: 16584873 DOI: 10.1016/j.etp.2006.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2005] [Accepted: 02/16/2006] [Indexed: 11/19/2022]
Abstract
Allergic diseases like bronchial asthma are increasing in societies with western lifestyle. In the last years substantial progress was made in the understanding of the underlying mechanisms and explanations like the hygiene hypothesis were developed. However the exact mechanisms of the physiological and immunological events in the lung leading to bronchial asthma are still not fully understood. Therefore, animal models of asthma have been established and improved to study the complex cellular interactions in vivo. Since mice became the most frequently used animal species the methods for detecting lung physiology, e.g. lung function measurements were adapted to the small size of the murine lung. Laser-dissection and precision cut lung slices have become common techniques to get a view into distinct lung compartments and cells. In addition genomic and proteomic approaches are now used widely. On the other hand a major conclusion of the workshop stated that more than one species is necessary in research and for pharmacological screening in asthma and COPD. The resulting new understanding in the mechanisms of asthma pathogenesis has lead to a rapid identification of novel pharmaceutical targets for treatment of the disease.
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Affiliation(s)
- Armin Braun
- Immunology and Allergology, Fraunhofer Institute of Toxicology and Experimental Medicine, Nikolai-Fuchs-Str. 1, 30625 Hannover, Germany.
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