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Fu D, Gao S, Li JN, Cui YH, Luo YW, Zhong YJ, Li Q, Luo C, Dai RP, Luo RY, Hu ZL. P75 NTR+CD64 + neutrophils promote sepsis-induced acute lung injury. Clin Immunol 2024; 263:110206. [PMID: 38599263 DOI: 10.1016/j.clim.2024.110206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/24/2024] [Accepted: 03/30/2024] [Indexed: 04/12/2024]
Abstract
Patients suffering from sepsis-induced acute lung injury (ALI) exhibit a high mortality rate, and their prognosis is closely associated with infiltration of neutrophils into the lungs. In this study, we found a significant elevation of CD64+ neutrophils, which highly expressed p75 neurotrophin receptor (p75NTR) in peripheral blood of mice and patients with sepsis-induced ALI. p75NTR+CD64+ neutrophils were also abundantly expressed in the lung of ALI mice induced by lipopolysaccharide. Conditional knock-out of the myeloid lineage's p75NTR gene improved the survival rates, attenuated lung tissue inflammation, reduced neutrophil infiltration and enhanced the phagocytic functions of CD64+ neutrophils. In vitro, p75NTR+CD64+ neutrophils exhibited an upregulation and compromised phagocytic activity in blood samples of ALI patients. Blocking p75NTR activity by soluble p75NTR extracellular domain peptide (p75ECD-Fc) boosted CD64+ neutrophils phagocytic activity and reduced inflammatory cytokine production via regulation of the NF-κB activity. The findings strongly indicate that p75NTR+CD64+ neutrophils are a novel pathogenic neutrophil subpopulation promoting sepsis-induced ALI.
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Affiliation(s)
- Di Fu
- Department of Anesthesiology, The Xiangya Hospital, Central South University, Changsha City, Hunan 410008, China
| | - Shan Gao
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Jia-Nan Li
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Yan-Hui Cui
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, Hunan 410011, China
| | - Yan-Wei Luo
- Department of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Yan-Jun Zhong
- Department of Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiao Li
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Cong Luo
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Ru-Ping Dai
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Ru-Yi Luo
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China.
| | - Zhao-Lan Hu
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China.
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Mossa A, Cammisotto PG, Velasquez-Flores M, Campeau L. Adaptation to partial urethral obstruction in healthy aging LOU rats and the role of nerve growth factor signaling pathway in the bladder. Exp Gerontol 2021; 157:111625. [PMID: 34780930 DOI: 10.1016/j.exger.2021.111625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/14/2021] [Accepted: 11/07/2021] [Indexed: 11/04/2022]
Abstract
AIM Aging is associated with poor ability to adapt to stress and abnormal nerve growth factor (NGF) profile. Lower urinary tract symptoms frequently disturb the quality of life of the aging population with no optimal treatment for both genders. The aim of the study was to compare the bladder response to bladder outflow obstruction in young and old LOU rats, a model of healthy aging that does not develop insulin resistance, and its relation to proNGF/NGF imbalance. METHODS 6- and 36-month-old female LOU rats were subjected to partial bladder urethral obstruction (PUO) for 2 weeks. Morphometric parameters (body and bladder weight) and glycemia were evaluated. Cystometry was carried out to measure functional parameters followed by ex vivo assessment of muscle strip contractile characteristics. Tissue proteins were examined by immunoblotting and morphology was examined by microscopy. RESULTS Body weight and glycaemia were not affected by surgery. PUO increases significantly bladder weight with increased thickness and fibrosis of the bladder wall as revealed by histological examination in both age groups. Cystometry showed that old PUO rats had a significant reduction in the intercontraction interval and the bladder capacity, a pattern opposite to young rats with PUO. Contractile properties of bladder strip were not affected by age or PUO. On the molecular level, the old rats had lower abundance of the mature NGF relative to proNGF, with signs of p75NTR activation suggested by the higher expression of TNF-α and JNK phosphorylation in the bladder tissue. CONCLUSION Bladder adaptation to PUO occurs only in young LOU rats to maintain efficient bladder contractility. Old LOU rats display proNGF/NGF imbalance and the associated p75NTR activation. This can further induce tissue damage and degeneration through activation of JNK pathway and release of TNF-α which in turn interferes with the necessary bladder adaptation.
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Affiliation(s)
- Abubakr Mossa
- Lady Davis Institute, McGill University, Montreal, Quebec, Canada
| | | | | | - Lysanne Campeau
- Lady Davis Institute, McGill University, Montreal, Quebec, Canada; Division of Urology, Department of Surgery, McGill University, Montreal, Quebec, Canada.
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3
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Xue Y, Liang H, Yang R, Deng K, Tang M, Zhang M. The role of pro- and mature neurotrophins in the depression. Behav Brain Res 2021; 404:113162. [PMID: 33549684 DOI: 10.1016/j.bbr.2021.113162] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 01/22/2021] [Accepted: 02/02/2021] [Indexed: 12/24/2022]
Abstract
Neurotrophic factors, which can provide nutritional support to neurons and neuronal cells, also played an important role in their proliferation and survival. As signaling molecules, it also mediated the learning, memory and other activities in the brain. The latest study shows that neurotrophic factors have diametrically opposing effects of the pro- and mature form through distinct receptors. In this review, we summarize the different forms of neurotrophic factors, related receptors, and the corresponding biological effects. More importantly, we expounded the physiology and pathology mechanisms of brain-derived neurotrophic factor(BDNF)in depression. It is hopefully to provide new idea on the relationship of neurotrophic factors and depression.
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Affiliation(s)
- Ying Xue
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.
| | - Hongyan Liang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.
| | - Rui Yang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.
| | - Kunhong Deng
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China; Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, China.
| | - Mimi Tang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.
| | - Mengqi Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China.
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Mossa AH, Abdaem J, Cammisotto P, Campeau L. Deleterious impact of nerve growth factor precursor (proNGF) on bladder urothelial and smooth muscle cells. Cell Signal 2021; 81:109936. [PMID: 33529756 DOI: 10.1016/j.cellsig.2021.109936] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/28/2021] [Accepted: 01/28/2021] [Indexed: 12/21/2022]
Abstract
The nerve growth factor precursor (proNGF) activates p75NTR receptor and promotes cell death in different tissues, yet this pathophysiological effect is not fully described in the bladder. The aim of this study was to identify the biological effect of proNGF/p75NTR activation on urothelial and smooth muscle (SM) cells of rodents' bladder. Cell viability was assessed by MTT assay which showed a significant reduction in urothelial viability after 24 h of incubation with proNGF in culture medium [5 or 10 nM], an effect not seen in SM cells. Western blot analysis on cellular protein extracts showed increased expression of the transmembrane TNF-α and activation of RhoA in urothelial cells exposed to proNGF with no evidence of a nuclear translocation of NF-κB assessed by western blotting on nuclear extracts and immunofluorescence. The activation of p75NTR-death domain related pathways in urothelial cells such as TNF-α or RhoA had a downstream effect on NO release and the junctional protein occludin, as estimated respectively by colorimetric and western blotting. On the other hand, proNGF did not induce TNF-α or RhoA expression in SM cells, but induced a significant NF-κB nuclear translocation. ProNGF had a different impact on SM as evidenced by a significant dose- and time-dependent increase in SM proliferation and migration examined by MTT test and cell migration assay. Together, our results indicate that activation of proNGF/p75NTR axis induces degenerative changes to the urothelial layer impacting its barrier and signaling integrity, while promoting adaptive proliferative changes in detrusor SM cells that can interfere with the contractile phenotype essential for proper bladder function.
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Affiliation(s)
- Abubakr H Mossa
- Lady Davis Institute, McGill University, 3755, Chemin de la cote-Ste-Catherine, Montreal, QC H3T 1E2, Canada
| | - Jacob Abdaem
- School of Medicine, McGill University, 3605 Rue de la Montagne, Montréal, QC H3G 2M1, Canada
| | - Philippe Cammisotto
- Lady Davis Institute, McGill University, 3755, Chemin de la cote-Ste-Catherine, Montreal, QC H3T 1E2, Canada
| | - Lysanne Campeau
- Lady Davis Institute, McGill University, 3755, Chemin de la cote-Ste-Catherine, Montreal, QC H3T 1E2, Canada; Urology Department, Jewish General Hospital, 3755, Chemin de la cote-Ste-Catherine, Montreal, QC H3T 1E2, Canada.
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5
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Yang Z, Zou W, Pan Y, Yong KT, Li L, Wang X, Liu D, Chen T, Xue D, Lin G. PEGylated CuInS 2/ZnS quantum dots inhibit neurite outgrowth by downregulating the NGF/p75 NTR/MAPK pathway. Ecotoxicol Environ Saf 2021; 207:111378. [PMID: 33022524 DOI: 10.1016/j.ecoenv.2020.111378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 09/14/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
The widespread application of cadmium-free CuInS2/ZnS QDs has raised great concern regarding their potential toxicity to humans. To date, toxicological data related to CuInS2/ZnS QDs are scarce. Neurons play extraordinary roles in regulating the activities of organs and systems, and serious consequences occur when neurons are damaged. Currently, the potential toxicity of CuInS2/ZnS QDs on neurons has not been fully elucidated. Here, we investigate the neurotoxicity of PEGylated CuInS2/ZnS (CuInS2/ZnS-PEG) QDs on neuron-like PC12 cells. We found that CuInS2/ZnS-PEG QDs were taken up by PC12 cells, but at a concentration range from 0 to 100 μg/mL, they did not affect the survival rate of the PC12 cells. In addition, we found that CuInS2/ZnS-PEG QDs significantly inhibited neurite outgrowth from and the differentiation of PC12 cells in the presence of NGF, while COOH-modified CuInS2/ZnS QDs or free PEG did not have a similar effect. Further studies showed that CuInS2/ZnS-PEG QDs obviously downregulated the expression of low-affinity NGF receptor (p75NTR) and subsequently negatively regulated the downstream MAPK cascade by dephosphorylating ERK1/2 and AKT. Taken together, these results suggest that CuInS2/ZnS-PEG QDs disturb NGF signal transduction from external stimuli to relevant internal signals, thus affecting normal biological processes such as neurite outgrowth and cell differentiation.
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Affiliation(s)
- Zhiwen Yang
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China
| | - Wenyi Zou
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China
| | - Yongning Pan
- Department of Disease Prevention and Control, Shenzhen Baoan District Health Bureau, Shenzhen, China
| | - Ken-Tye Yong
- School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore
| | - Li Li
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China
| | - Xiaomei Wang
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China
| | - Dongmeng Liu
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China
| | - Tingting Chen
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China
| | - Dahui Xue
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China
| | - Guimiao Lin
- Base for International Science and Technology Cooperation: Carson Cancer Stem Cell Vaccines R&D Center, Shenzhen Key Lab of Synthetic Biology, Department of Physiology, School of Basic Medical Sciences Shenzhen University, Shenzhen, 518055, China.
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Lin L, Zhou XF, Bobrovskaya L. Blockage of p75 NTR ameliorates depressive-like behaviours of mice under chronic unpredictable mild stress. Behav Brain Res 2021; 396:112905. [PMID: 32926907 DOI: 10.1016/j.bbr.2020.112905] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/15/2020] [Accepted: 09/08/2020] [Indexed: 10/23/2022]
Abstract
The precursor of brain derived neurotrophic factor (proBDNF) and its receptor p75NTR are upregulated in depressive patients and chronic stress-induced depressive animals, suggesting that activation of p75NTR signalling may underlie pathogenesis of depression. In the present study we hypothesize that the blockade of p75NTR may have therapeutic effect on depressive mice under chronic stress. The treatment of mice with the recombinant fusion protein of p75NTR extracellular domain and fragment C of immunoglobulin (p75ECD-Fc) significantly reduced the immobility time in the forced swim test and tail suspension test, and increased the time spent in the central zone in the open field test in mice exposed to chronic unpredictable mild stress (CUMS). p75ECD-Fc treatment also significantly increased the length and density of neuronal dendritic spines in the dentate gyrus and amygdala. Our data indicate that blocking p75NTR signalling can alleviate depressive and anxiety-like behaviours of chronically stressed mice and improve the dendritic spinogenesis of neurons under stress.
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Affiliation(s)
- Liying Lin
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Xin-Fu Zhou
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Larisa Bobrovskaya
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, Adelaide, South Australia, Australia.
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Kraemer BR, Clements RT, Escobedo CM, Nelson KS, Waugh CD, Elliott AS, Hall WC, Schemanski MT. c-Jun N-terminal Kinase Mediates Ligand-independent p75 NTR Signaling in Mesencephalic Cells Subjected to Oxidative Stress. Neuroscience 2021; 453:222-36. [PMID: 33253821 DOI: 10.1016/j.neuroscience.2020.11.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 11/01/2020] [Accepted: 11/22/2020] [Indexed: 12/11/2022]
Abstract
The p75 neurotrophin receptor (p75NTR) is a multifunctional protein that regulates cellular responses to pathological conditions in specific regions of the nervous system. Activation of p75NTR in certain neuronal populations induces proteolytic processing of the receptor, thereby generating p75NTR fragments that facilitate downstream signaling. Expression of p75NTR has been reported in neurons of the ventral midbrain, but p75NTR signaling mechanisms in such cells are poorly understood. Here, we used Lund Human Mesencephalic cells, a population of neuronal cells derived from the ventral mesencephalon, to evaluate the effects of oxidative stress on p75NTR signaling. Subjection of the cells to oxidative stress resulted in decreased cell-surface localization of p75NTR and intracellular accumulation of p75NTR fragments. Oxidative stress-induced p75NTR processing was reduced by pharmacological inhibition of metalloproteases or γ-secretase, but was unaltered by blockade of the ligand-binding domain of p75NTR. Furthermore, inhibition of c-Jun N-terminal Kinase (JNK) decreased p75NTR cleavage induced by oxidative damage. Altogether, these results support a mechanism of p75NTR activation in which oxidative stress stimulates JNK signaling, thereby facilitating p75NTR processing via a ligand-independent mechanism involving induction of metalloprotease and γ-secretase activity. These findings reveal a novel role for JNK in ligand-independent p75NTR signaling, and, considering the susceptibility of mesencephalic neurons to oxidative damage associated with Parkinson's disease (PD), merit further investigation into the effects of p75NTR on PD-related neurodegeneration.
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8
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Yin GN, Ock J, Limanjaya A, Minh NN, Hong SS, Yang T, Longo FM, Ryu JK, Suh JK. Oral Administration of the p75 Neurotrophin Receptor Modulator, LM11A-31, Improves Erectile Function in a Mouse Model of Cavernous Nerve Injury. J Sex Med 2020; 18:17-28. [PMID: 33243690 DOI: 10.1016/j.jsxm.2020.10.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 10/19/2020] [Accepted: 10/26/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Radical prostatectomy for prostate cancer can not only induce cavernous nerve injury (CNI), but also causes cavernous hypoxia and cavernous structural changes, which lead to a poor response to phosphodiesterase 5 inhibitors. AIM To investigate the therapeutic effect of oral administration of LM11A-31, a small molecule p75 neurotrophin receptor (p75NTR) ligand and proNGF antagonist, in a mouse model of bilateral CNI, which mimics nerve injury-induced erectile dysfunction after radical prostatectomy. METHODS 8-week-old male C57BL/6 mice were divided into sham operation and CNI groups. Each group was divided into 2 subgroups: phosphate-buffered saline and LM11A-31 (50 mg/kg/day) being administered once daily starting 3 days before CNI via oral gavage. 2 weeks after CNI, we measured erectile function by electrical stimulation of the bilateral cavernous nerve. The penis was harvested for histologic examination and Western blot analysis. The major pelvic ganglia was harvested and cultured for assays of ex vivo neurite outgrowth. OUTCOMES Intracavernous pressure, neurovascular regeneration in the penis, in vivo or ex vivo functional evaluation, and cell survival signaling were measured. RESULTS Erectile function was decreased in the CNI group (44% of the sham operation group), while administration of LM11A-31 led to a significant improvement of erectile function (70% of the sham operation group) in association with increased neurovascular content, including cavernous endothelial cells, pericytes, and neuronal processes. Immunohistochemical and Western blot analyses showed significantly increased p75NTR expression in the dorsal nerve of CNI mice, which was attenuated by LM11A-31 treatment. Protein expression of active PI3K, AKT, and endothelial nitric oxide synthase was increased, and cell death and c-Jun N-terminal kinase signaling was significantly attenuated after LM11A-31 treatment. Furthermore, LM11A-31 promoted neurite sprouting in cultured major pelvic ganglia after lipopolysaccharide exposure. CLINICAL IMPLICATIONS LM11A-31 may be used as a strategy to treat erectile dysfunction after radical prostatectomy or in men with neurovascular diseases. STRENGTHS & LIMITATIONS Unlike biological therapeutics, such as proteins, gene therapies, or stem cells, the clinical application of LM11A-31 would likely be relatively less complex and low cost. Our study has some limitations. Future studies will assess the optimal dosing and duration of the compound. Given its plasma half-life of approximately 1 hour, it is possible that dosing more than once per day will provide added efficacy. CONCLUSION Specific inhibition of the proNGF-p75NTR degenerative signaling via oral administration of LM11A-31 represents a novel therapeutic strategy for erectile dysfunction induced by nerve injury. Yin GN, Ock J, Limanjaya A, et al. Oral Administration of the p75 Neurotrophin Receptor Modulator, LM11A-31, Improves Erectile Function in a Mouse Model of Cavernous Nerve Injury. J Sex Med 2021;18:17-28.
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Affiliation(s)
- Guo Nan Yin
- National Research Center for Sexual Medicine and Department of Urology, Inha University School of Medicine, Incheon, Republic of Korea
| | - Jiyeon Ock
- National Research Center for Sexual Medicine and Department of Urology, Inha University School of Medicine, Incheon, Republic of Korea
| | - Anita Limanjaya
- National Research Center for Sexual Medicine and Department of Urology, Inha University School of Medicine, Incheon, Republic of Korea
| | - Nguyen Naht Minh
- National Research Center for Sexual Medicine and Department of Urology, Inha University School of Medicine, Incheon, Republic of Korea
| | - Soon-Sun Hong
- Department of Drug Development, Inha University School of Medicine, Incheon, Republic of Korea
| | - Tao Yang
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Frank M Longo
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Ji-Kan Ryu
- National Research Center for Sexual Medicine and Department of Urology, Inha University School of Medicine, Incheon, Republic of Korea.
| | - Jun-Kyu Suh
- National Research Center for Sexual Medicine and Department of Urology, Inha University School of Medicine, Incheon, Republic of Korea.
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Oliveira MA, Heimfarth L, Passos FRS, Miguel-Dos-Santos R, Mingori MR, Moreira JCF, Lauton SS, Barreto RSS, Araújo AAS, Oliveira AP, Oliveira JT, Baptista AF, Martinez AMB, Quintans-Júnior LJ, Quintans JSS. Naringenin complexed with hydroxypropyl-β-cyclodextrin improves the sciatic nerve regeneration through inhibition of p75 NTR and JNK pathway. Life Sci 2020; 241:117102. [PMID: 31790691 DOI: 10.1016/j.lfs.2019.117102] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 11/19/2019] [Accepted: 11/22/2019] [Indexed: 11/17/2022]
Abstract
Peripheral nerve injuries are common conditions that often lead to dysfunctions. Although much knowledge exists on the several factors that mediate the complex biological process involved in peripheral nerve regeneration, there is a lack of effective treatments that ensure full functional recovery. Naringenin (NA) is the most abundant flavanone found in citrus fruits and it has promising neuroprotective, anti-inflammatory and antioxidant effects. This study aimed to enhance peripheral nerve regeneration using an inclusion complex containing NA and hydroxypropyl-β-cyclodextrin (HPβCD), named NA/HPβCD. A mouse sciatic nerve crush model was used to evaluate the effects of NA/HPβCD on nerve regeneration. Sensory and motor parameters, hyperalgesic behavior and the sciatic functional index (SFI), respectively, improved with NA treatment. Western blot analysis revealed that the levels of p75NTR ICD and p75NTR full length as well phospho-JNK/total JNK ratios were preserved by NA treatment. In addition, NA treatment was able to decrease levels of caspase 3. The concentrations of TNF-α and IL-1β were decreased in the lumbar spine, on the other hand there was an increase in IL-10. NA/HPβCD presented a better overall morphological profile but it was not able to increase the number of myelinated fibers. Thus, NA was able to enhance nerve regeneration, and NA/HPβCD decreased effective drug doses while maintaining the effect of the pure drug, demonstrating the advantage of using the complex over the pure compound.
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Affiliation(s)
- Marlange A Oliveira
- Multiuser Health Center Facility (CMulti-Saúde), Federal University of Sergipe; Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil
| | - Luana Heimfarth
- Multiuser Health Center Facility (CMulti-Saúde), Federal University of Sergipe; Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil
| | - Fabiolla Rocha Santos Passos
- Multiuser Health Center Facility (CMulti-Saúde), Federal University of Sergipe; Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil
| | - Rodrigo Miguel-Dos-Santos
- Multiuser Health Center Facility (CMulti-Saúde), Federal University of Sergipe; Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil
| | - Moara R Mingori
- Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - José Cláudio F Moreira
- Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Sandra S Lauton
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil
| | - Rosana S S Barreto
- Multiuser Health Center Facility (CMulti-Saúde), Federal University of Sergipe; Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil
| | - Adriano A S Araújo
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, SE, 49100-000, Brazil
| | - Aldeidia P Oliveira
- Medicinal Plants Research Center, Federal University of Piauí, Teresina, PI 64.049-550, Brazil
| | - Júlia T Oliveira
- Department of Pathology, Medical School - HUCFF - Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Ana Maria B Martinez
- Department of Pathology, Medical School - HUCFF - Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Lucindo J Quintans-Júnior
- Multiuser Health Center Facility (CMulti-Saúde), Federal University of Sergipe; Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil.
| | - Jullyana S S Quintans
- Multiuser Health Center Facility (CMulti-Saúde), Federal University of Sergipe; Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, 49100-000 lBrazil.
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10
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Moreira da Silva Santos A, Gorman AM, Kelly JP, Doyle KM. Time and region-dependent manner of increased brain derived neurotrophic factor and TrkB in rat brain after binge-like methamphetamine exposure. Neurosci Lett 2020; 715:134606. [PMID: 31693929 DOI: 10.1016/j.neulet.2019.134606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 10/06/2019] [Accepted: 10/29/2019] [Indexed: 12/27/2022]
Abstract
Methamphetamine (MA), a synthetic derivate of amphetamine, has become a major drug of abuse worldwide. This study investigated the effect of binge-like MA dosing (4 x 4 mg/kg, s.c., 2 h (h) apart) at a range of different time points (from 2 h to 7 days after treatment) on brain-derived neurotrophic factor (BDNF) levels and its receptors, TrkB and p75NTR. BDNF levels were significantly increased in the frontal cortex from 2 to 36 h after treatment, returning to normal within 48 h after treatment. In the striatum, BDNF expression was increased at 12 and 24 h after binge-like MA treatment and had returned to normal at 36 h. Increased expression of the TrkB receptor was observed in the frontal cortex at 2, 24 and 48 h after MA treatment and in the striatum at 24 and 48 h after the MA regimen. A significant increase in the p75NTR receptor was also noted in the striatum but not the frontal cortex, and it was less pronounced than the effect on TrkB receptor expression. These findings show that the binge-like regimen of MA affects expression of BDNF and its receptors, particularly the TrkB receptor, in a time and region dependent manner, and highlights the importance of the frontal cortex and the striatum in the response following MA binge-like dosing.
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Affiliation(s)
- Andreia Moreira da Silva Santos
- School of Medicine and Galway Neuroscience Centre, National University of Ireland, Galway, Ireland; Centro Universitário Unievangélica, Anápolis - GO CEP: 75083-515, Brazil
| | - Adrienne M Gorman
- School of Natural Sciences and Apoptosis Research Centre, National University of Ireland, Galway, Ireland
| | - John P Kelly
- School of Medicine and Galway Neuroscience Centre, National University of Ireland, Galway, Ireland
| | - Karen M Doyle
- School of Medicine and Galway Neuroscience Centre, National University of Ireland, Galway, Ireland.
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11
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Shen LL, Li WW, Xu YL, Gao SH, Xu MY, Bu XL, Liu YH, Wang J, Zhu J, Zeng F, Yao XQ, Gao CY, Xu ZQ, Zhou XF, Wang YJ. Neurotrophin receptor p75 mediates amyloid β-induced tau pathology. Neurobiol Dis 2019; 132:104567. [PMID: 31394202 DOI: 10.1016/j.nbd.2019.104567] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 06/10/2019] [Accepted: 08/02/2019] [Indexed: 01/05/2023] Open
Abstract
Neurofibrillary tangles of hyperphosphorylated tau protein (p-tau) are a key pathological feature of Alzheimer's disease (AD). Tau phosphorylation is suggested to be secondary to amyloid-beta (Aβ) accumulation. However, the mechanism by which Aβ induces tau phosphorylation in neurons remains unclear. Neurotrophin receptor p75 (p75NTR) is a receptor for Aβ and mediates Aβ neurotoxicity, implying that p75NTR may mediate Aβ-induced tau phosphorylation in AD. Here, we showed that Aβ-induced tau hyperphosphorylation and neurodegeneration, including tau phosphorylation, synaptic disorder and neuronal loss, in the brains of both male wild-type (Wt) mice and male P301L transgenic mice (a mouse model of human tauopathy) were alleviated by genetic knockout of p75NTR in the both mouse models. We further confirmed that the activation or inhibition of cyclin-dependent kinase 5 (CDK5) and glycogen synthase kinase-3β (GSK3β) significantly changed Aβ/p75NTR-mediated p-tau levels in neurons. Treatment of male P301L mice with soluble p75NTR extracellular domain (p75ECD-Fc), which antagonizes the binding of Aβ to p75NTR, suppressed tau hyperphosphorylation. Taken together, our findings suggest that p75NTR meditates Aβ-induced tau pathology and is a potential druggable target for AD and other tauopathies.
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Affiliation(s)
- Lin-Lin Shen
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China; Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse 857000, China
| | - Wei-Wei Li
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Ya-Li Xu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Shi-Hao Gao
- Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse 857000, China
| | - Man-Yu Xu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Xian-Le Bu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Yu-Hui Liu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Jun Wang
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Jie Zhu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Fan Zeng
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Xiu-Qing Yao
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Chang-Yue Gao
- Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China; Department of Rehabilitation, Daping Hospital, Third Military Medical University, Chongqing 400042, China
| | - Zhi-Qiang Xu
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China
| | - Xin-Fu Zhou
- School of Pharmacy and Medical Sciences and Sansom Institute, Division of Health Sciences, University of South Australia, Adelaide 5001, Australia
| | - Yan-Jiang Wang
- Department of Neurology and Center for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing 400042, China; Chongqing Key Laboratory of Aging and Brain Diseases, Chongqing 400042, China; State Key Laboratory of Trauma, Burn and Combined Injury, Third Military Medical University, Chongqing 400042, China; Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China.
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12
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Liu Z, Cao Y, Liu G, Yin S, Ma J, Liu J, Zhang M, Wang Y. p75 neurotrophin receptor regulates NGF-induced myofibroblast differentiation and collagen synthesis through MRTF-A. Exp Cell Res 2019; 383:111504. [PMID: 31325438 DOI: 10.1016/j.yexcr.2019.111504] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 07/02/2019] [Accepted: 07/15/2019] [Indexed: 02/09/2023]
Abstract
Myofibroblasts are characterized by de novo expression of α-smooth muscle actin (α-SMA) and play a key role in tissue repair and remodeling. In addition to TGF-β1, recent studies have shown that nerve growth factor (NGF) has effects on myofibroblast differentiation and collagen synthesis. However, the regulatory mechanism remains poorly defined. NGF effects are mediated by the specific expression of the NGF neurotrophic tropomyosin-receptor kinase A (TrkA) and p75 neurotrophin receptor (p75NTR). Using NIH/3T3 fibroblast cell lines, we examined the induction of myofibroblast differentiation stimulated by NGF. Our findings showed that p75NTR was in keeping with the expression of α-SMA. Herein, we investigated the role of p75NTR in NGF-induced myofibroblast differentiation and collagen synthesis in these cells using lentivirus transfection to overexpress and knock down. Our results showed that p75NTR was preferentially expressed and was sufficient to induce actin cytoskeleton remodeling, which was required for NGF-induced α-SMA expression. Furthermore, NGF induced nuclear translocation of MRTF-A, an effect that was regulated by p75NTR, and required for α-SMA and collagen-I expression in myofibroblasts. Using a novel MRTF-A pathway inhibitor, CCG-203971, we further demonstrated the requirement of MRTF-A nuclear localization and activity in NGF-induced α-SMA expression. In conclusion, we conclude that p75NTR regulates NGF-induced myofibroblast differentiation and collagen synthesis through MRTF-A. Regulation of NGF-p75NTR interactions represents a promising therapy for fibrotic disorders.
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Affiliation(s)
- Zhenxing Liu
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China
| | - Yongqian Cao
- Department of Burns and Plastic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, Shandong, China
| | - Guijun Liu
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China
| | - Siyuan Yin
- Department of Burns and Plastic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, Shandong, China
| | - Jiaxu Ma
- Department of Burns and Plastic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, Shandong, China
| | - Jian Liu
- Department of Burns and Plastic Surgery, Yantai Yuhuangding Hospital, Yantai, 264000, Shandong, China
| | - Min Zhang
- Department of Burns and Plastic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, Shandong, China
| | - Yibing Wang
- Department of Burns and Plastic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, Shandong, China.
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Guo W, Pang K, Chen Y, Wang S, Li H, Xu Y, Han F, Yao H, Liu H, Lopes-Rodrigues V, Sun D, Shao J, Shen J, Dou Y, Zhang W, You H, Wu W, Lu B. TrkB agonistic antibodies superior to BDNF: Utility in treating motoneuron degeneration. Neurobiol Dis 2019; 132:104590. [PMID: 31470106 DOI: 10.1016/j.nbd.2019.104590] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 08/18/2019] [Accepted: 08/26/2019] [Indexed: 12/13/2022] Open
Abstract
While Brain-derived Neurotrophic Factor (BDNF) has long been implicated in treating neurological diseases, recombinant BDNF protein has failed in multiple clinical trials. In addition to its unstable and adhesive nature, BDNF can activate p75NTR, a receptor mediating cellular functions opposite to those of TrkB. We have now identified TrkB agonistic antibodies (TrkB-agoAbs) with several properties superior to BDNF: They exhibit blood half-life of days instead of hours, diffuse centimeters in neural tissues instead millimeters, and bind and activate TrkB, but not p75NTR. In addition, TrkB-agoAbs elicit much longer TrkB activation, reduced TrkB internalization and less intracellular degradation, compared with BDNF. More importantly, some of these TrkB-agoAbs bind TrkB epitopes distinct from that by BDNF, and work cooperatively with endogenous BDNF. Unlike BDNF, the TrkB-agoAbs exhibit a half-life of days/weeks and diffused readily in nerve tissues. We tested one of TrkB-agoAbs further and showed that it enhanced motoneuron survival in the spinal-root avulsion model for motoneuron degeneration in vivo. Thus, TrkB-agoAbs are promising drug candidates for the treatment of neural injury.
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14
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Ishii T, Warabi E, Mann GE. Circadian control of BDNF-mediated Nrf2 activation in astrocytes protects dopaminergic neurons from ferroptosis. Free Radic Biol Med 2019; 133:169-178. [PMID: 30189266 DOI: 10.1016/j.freeradbiomed.2018.09.002] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/20/2018] [Accepted: 09/01/2018] [Indexed: 01/19/2023]
Abstract
Astrocyte-neuron interactions protect neurons from iron-mediated toxicity. As dopamine can be metabolized to reactive quinones, dopaminergic neurons are susceptible to oxidative damage and ferroptosis-like induced cell death. Detoxification enzymes are required to protect neurons. Brain-derived neurotrophic factor (BDNF) plays a key role in the regulation of redox sensitive transcription factor Nrf2 in astrocytes and metabolic cooperation between astrocytes and neurons. This article reviews the importance of BDNF and astrocyte-neuron interactions in the protection of neurons against oxidative damages in rodent brains. We previously proposed that BDNF activates Nrf2 via the truncated TrkB.T1 and p75NTR receptor complex in astrocytes. Stimulation by BDNF generates the signaling molecule ceramide, which activates PKCζ leading to induction of the CK2-Nrf2 signaling axis. As a cell clock regulates p75NTR expression, we suggested that BDNF effectively activates Nrf2 in astrocytes during the rest phase. In contrast, neurons express both TrkB.FL and TrkB.T1, and TrkB.FL tyrosine kinase activity inhibits p75NTR-dependent ceramide generation and internalizes p75NTR. Therefore, BDNF may not effectively activate Nrf2 in neurons. Notably, neurons only weakly activate detoxification and antioxidant enzymes/proteins via the Nrf2-ARE signaling axis. Thus, astrocytes may provide relevant transcripts and/or proteins to neurons via microparticles/exosomes increasing neuronal resistance to oxidative stress. Circadian increases in the levels of circulating glucocorticoids may further facilitate material transfer from astrocytes to neurons via the stimulation of pannexin 1 channels-P2X7R signaling pathway in astrocytes at the beginning of the active phase. Dysregulation of astrocyte-neuron interactions could therefore contribute to the pathogenesis of neurodegenerative diseases including Parkinson's disease.
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Affiliation(s)
- Tetsuro Ishii
- School of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
| | - Eiji Warabi
- School of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Giovanni E Mann
- School of Cardiovascular Medicine and Sciences, King's British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences and Medicine, King's College London, London SE1 9NH, UK
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15
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Giza JI, Kim J, Meyer HC, Anastasia A, Dincheva I, Zheng CI, Lopez K, Bains H, Yang J, Bracken C, Liston C, Jing D, Hempstead BL, Lee FS. The BDNF Val66Met Prodomain Disassembles Dendritic Spines Altering Fear Extinction Circuitry and Behavior. Neuron 2018; 99:163-178.e6. [PMID: 29909994 DOI: 10.1016/j.neuron.2018.05.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 01/18/2018] [Accepted: 05/15/2018] [Indexed: 11/16/2022]
Abstract
A human variant in the BDNF gene (Val66Met; rs6265) is associated with impaired fear extinction. Using super-resolution imaging, we demonstrate that the BDNF Met prodomain disassembles dendritic spines and eliminates synapses in hippocampal neurons. In vivo, ventral CA1 (vCA1) hippocampal neurons undergo similar morphological changes dependent on their transient co-expression of a SorCS2/p75NTR receptor complex during peri-adolescence. BDNF Met prodomain infusion into the vCA1 during this developmental time frame reduces dendritic spine density and prelimbic (PL) projections, impairing cued fear extinction. Adolescent BdnfMet/Met mice display similar spine and PL innervation deficits. Using fiber photometry, we found that, in wild-type mice, vCA1 neurons projecting to the PL encode extinction by enhancing neural activity in threat anticipation and rapidly subsiding their response. This adaptation is absent in BDNFMet/Met mice. We conclude that the BDNF Met prodomain renders vCA1-PL projection neurons underdeveloped, preventing their capacity for subsequent circuit modulation necessary for fear extinction. VIDEO ABSTRACT.
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Affiliation(s)
- Joanna I Giza
- Department of Psychiatry, Weill Cornell Medicine, New York, NY 10065, USA
| | - Jihye Kim
- Department of Psychiatry, Weill Cornell Medicine, New York, NY 10065, USA
| | - Heidi C Meyer
- Department of Psychiatry, Weill Cornell Medicine, New York, NY 10065, USA
| | - Agustin Anastasia
- Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Córdoba, Argentina
| | - Iva Dincheva
- Department of Psychiatry, Columbia University, New York, NY 10032, USA
| | - Crystal I Zheng
- Department of Psychiatry, Weill Cornell Medicine, New York, NY 10065, USA
| | - Katherine Lopez
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Henrietta Bains
- Department of Medicine, Weill Cornell Medicine, New York, NY 10065, USA
| | - Jianmin Yang
- Department of Medicine, Weill Cornell Medicine, New York, NY 10065, USA; Key Laboratory of Shaanxi Province Department for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, PR China
| | - Clay Bracken
- Department of Biochemistry, Weill Cornell Medicine, New York, NY 10065, USA
| | - Conor Liston
- Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Deqiang Jing
- Department of Psychiatry, Weill Cornell Medicine, New York, NY 10065, USA
| | | | - Francis S Lee
- Department of Psychiatry, Weill Cornell Medicine, New York, NY 10065, USA; Sackler Institute for Developmental Psychobiology, Weill Cornell Medicine, New York, NY 10065, USA.
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16
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Ishii T, Warabi E, Mann GE. Circadian control of p75 neurotrophin receptor leads to alternate activation of Nrf2 and c-Rel to reset energy metabolism in astrocytes via brain-derived neurotrophic factor. Free Radic Biol Med 2018; 119:34-44. [PMID: 29374533 DOI: 10.1016/j.freeradbiomed.2018.01.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 01/17/2018] [Accepted: 01/22/2018] [Indexed: 12/13/2022]
Abstract
Circadian clock genes regulate energy metabolism partly through neurotrophins in the body. The low affinity neurotrophin receptor p75NTR is a clock component directly regulated by the transcriptional factor Clock:Bmal1 complex. Brain-derived neurotrophic factor (BDNF) is expressed in the brain and plays a key role in coordinating metabolic interactions between neurons and astrocytes. BDNF transduces signals through TrkB and p75NTR receptors. This review highlights a novel molecular mechanism by which BDNF via circadian control of p75NTR leads to daily resetting of glucose and glycogen metabolism in brain astrocytes to accommodate their functional interaction with neurons. Astrocytes store glycogen as an energy reservoir to provide active neurons with the glycolytic metabolite lactate. Astrocytes predominantly express the truncated receptor TrkB.T1 which lacks an intracellular receptor tyrosine kinase domain. TrkB.T1 retains the capacity to regulate cell morphology through regulation of Rho GTPases. In contrast, p75NTR mediates generation of the bioactive lipid ceramide upon stimulation with BDNF and inhibits PKA activation. As ceramide directly activates PKCζ, we discuss the importance of the TrkB.T1-p75NTR-ceramide-PKCζ signaling axis in the stimulation of glycogen and lipid synthesis and activation of RhoA. Ceramide-PKCζ-casein kinase 2 signaling activates Nrf2 to support oxidative phosphorylation via upregulation of antioxidant enzymes. In the absence of p75NTR, TrkB.T1 functionally interacts with adenosine A2AR and dopamine D1R receptors to enhance cAMP-PKA signaling and activate Rac1 and NF-κB c-Rel, favoring glycogen hydrolysis, gluconeogenesis and aerobic glycolysis. Thus, diurnal changes in p75NTR levels in astrocytes resets energy metabolism via BDNF to accommodate their metabolic interaction with neurons.
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Affiliation(s)
- Tetsuro Ishii
- School of Medicine, University of Tsukuba, Tsukuba Ibaraki 305-0863, Japan.
| | - Eiji Warabi
- School of Medicine, University of Tsukuba, Tsukuba Ibaraki 305-0863, Japan
| | - Giovanni E Mann
- School of Cardiovascular Medicine and Sciences, King's British Heart Foundation Centre of Excellence, Faculty of Life Sciences and Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK
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Ji M, Yuan H, Yuan S, Xia J, Yang J. The p75 neurotrophin receptor might mediate sepsis-induced synaptic and cognitive impairments. Behav Brain Res 2018; 347:339-49. [PMID: 29604364 DOI: 10.1016/j.bbr.2018.03.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 03/27/2018] [Accepted: 03/27/2018] [Indexed: 12/16/2022]
Abstract
Systemic inflammation induces cognitive impairment, yet the mechanism involved in this process is unclear. Neurotrophin receptor p75 (p75NTR) signaling is a key pathological factor contributing to neurobehavioral abnormalities in many neurodegenerative diseases. However, the role of p75NTR signaling in the regulation of sepsis-induced cognitive impairment remains largely to be elucidated. In this study, systemic inflammation was induced by cecal ligation and puncture (CLP). Neurobehavioral performances were evaluated by open field, novel object recognition, and fear conditioning tests. The expressions of proinflammatory cytokines (tumor necrosis factor (TNF-α), interleukin-1β (IL-1β), IL-6, IL-10), apoptosis marker cleaved caspase-3, ionized calcium binding adaptor molecule 1 (IBA1), proBDNF, p75NTR, c-Jun N-terminal kinase (JNK), and pJNK in the hippocampus were determined by enzyme-linked immunosorbent assay, western blot analysis, and immunofluorescence. The synaptic marker in the CA1 region of the hippocampus was assessed by Golgi staining. In the present study, we showed that systemic inflammation induced cognitive impairment, which was accompanied by increased expressions of hippocampcal proBDNF and p75NTR. Of note, we found that LM11A-31, an orally available, blood-brain barrier-permeant small-molecule p75NTR signaling modulator significantly reversed the sepsis-induced cognitive impairment and restored most of the abnormal biochemical parameters. Taken together, our study suggests that proBDNF/p75NTR signaling pathway might play a key role in the development of sepsis-induced cognitive impairment, whereas specific p75NTR inhibitor may provide a novel therapeutic approach for this disorder and possible other neurodegenerative diseases.
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18
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Huang P, Tong D, Sun J, Li Q, Zhang F. Generation and characterization of a human oral squamous carcinoma cell line SCC-9 with CRISPR/Cas9-mediated deletion of the p75 neurotrophin receptor. Arch Oral Biol 2017; 82:223-232. [PMID: 28654784 DOI: 10.1016/j.archoralbio.2017.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/03/2017] [Accepted: 06/05/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To investigate the importance of the p75 neurotrophin receptor (p75NTR) in human tongue squamous carcinoma cells, we exploited the CRISPR/Cas9 technology to establish a p75NTR-knockout SCC-9 cell line and to explore the effect on biological functions. MATERIALS AND METHODS The clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated endonuclease (Cas9) system was used to generate genomic deletion mutants of p75NTR in the tongue squamous carcinoma cell lines SCC-9. Single-guide RNA (sgRNA) sequences were designed to target the p75NTR genomic sequence and were cloned into plasmid pGK1.1. The linearized vector was electroporated into SCC-9 cells and p75NTR deletion was confirmed using Cruiser™ enzyme digestion and PCR amplification. SCC-9 clones with successful deletion of p75NTR were identified and verified by sequencing and selected for functional testing in cell proliferation, invasion, migration, and colony-forming assays. RESULTS Compared with control cells, p75NTR-knockout SCC-9 cells showed significantly diminished abilities to proliferate, invade, migrate, and form colonies, indicating a reduction in pro-tumorigenic behavior. CONCLUSION These data demonstrate, first, that the CRISPR/Cas9 system is a simplified method for generating p75NTR knockouts with relatively high efficiency, and second, that deletion of p75NTR suppresses several tumor-promoting properties of SCC-9 cells, suggesting that p75NTR is a potential target for the development of novel therapies for tongue cancer.
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Affiliation(s)
- Ping Huang
- Department of Gynecology, Qilu Hospital, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Shandong University, Jinan, Shandong 250012, PR China
| | - Dongdong Tong
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Shandong University, Jinan, Shandong 250012, PR China
| | - Jing Sun
- Department of Bone Metabolism, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Shandong University, Jinan, Shandong 250012, PR China
| | - Qing Li
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Shandong University, Jinan, Shandong 250012, PR China
| | - Fenghe Zhang
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Shandong University, Jinan, Shandong 250012, PR China.
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Abstract
In the last few years, exciting properties have emerged regarding the activation, signaling, mechanisms of action, and therapeutic targeting of the two types of neurotrophin receptors: the p75NTR with its intracellular and extracellular peptides, the Trks, their precursors and their complexes. This review summarizes these new developments, with particular focus on neurodegenerative diseases. Based on the evolving knowledge, innovative concepts have been formulated regarding the pathogenesis of these diseases, especially the Alzheimer's and two other, the Parkinson's and Huntington's diseases. The medical progresses include original procedures of diagnosis, started from studies in mice and now investigated for human application, based on innovative classes of receptor agonists and blockers. In parallel, comprehensive studies have been and are being carried out for the development of drugs. The relevance of these studies is based on the limitations of the therapies employed until recently, especially for the treatment of Alzheimer's patients. Starting from well known drugs, previously employed for non-neurodegenerative diseases, the ongoing progress has lead to the development of small molecules that cross rapidly the blood-brain barrier. Among these molecules the most promising are specific blockers of the p75NTR receptor. Additional drugs, that activate Trk receptors, were shown effective against synaptic loss and memory deficits. In the near future such approaches, coordinated with treatments with monoclonal antibodies and with developments in the microRNA field, are expected to improve the therapy of neurodegenerative diseases, and may be relevant also for other human disease conditions.
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Affiliation(s)
- Jacopo Meldolesi
- Department of Neuroscience, Vita-Salute San Raffaele University and Scientific Institute San Raffaele, via Olgettina 58, 20132 Milan, Italy.
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20
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Alshehri MM, Robbins SM, Senger DL. The Role of Neurotrophin Signaling in Gliomagenesis: A Focus on the p75 Neurotrophin Receptor (p75 NTR/CD271). Vitam Horm 2017; 104:367-404. [PMID: 28215302 DOI: 10.1016/bs.vh.2016.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The p75 neurotrophin receptor (p75NTR, a.k.a. CD271), a transmembrane glycoprotein and a member of the tumor necrosis family (TNF) of receptors, was originally identified as a nerve growth factor receptor in the mid-1980s. While p75NTR is recognized to have important roles during neural development, its presence in both neural and nonneural tissues clearly supports the potential to mediate a broad range of functions depending on cellular context. Using an unbiased in vivo selection paradigm for genes underlying the invasive behavior of glioma, a critical characteristic that contributes to poor clinical outcome for glioma patients, we identified p75NTR as a central regulator of glioma invasion. Herein we review the expanding role that p75NTR plays in glioma progression with an emphasis on how p75NTR may contribute to the treatment refractory nature of glioma. Based on the observation that p75NTR is expressed and functional in two critical glioma disease reservoirs, namely, the highly infiltrative cells that evade surgical resection, and the radiation- and chemotherapy-resistant brain tumor-initiating cells (also referred to as brain tumor stem cells), we propose that p75NTR and its myriad of downstream signaling effectors represent rationale therapeutic targets for this devastating disease. Lastly, we provide the provocative hypothesis that, in addition to the well-documented cell autonomous signaling functions, the neurotrophins, and their respective receptors, contribute in a cell nonautonomous manner to drive the complex cellular and molecular composition of the brain tumor microenvironment, an environment that fuels tumorigenesis.
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Affiliation(s)
- M M Alshehri
- Arnie Charbonneau Cancer Centre, University of Calgary, Calgary, AB, Canada
| | - S M Robbins
- Arnie Charbonneau Cancer Centre, University of Calgary, Calgary, AB, Canada
| | - D L Senger
- Arnie Charbonneau Cancer Centre, University of Calgary, Calgary, AB, Canada.
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21
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Pingitore A, Caroleo MC, Cione E, Castañera Gonzalez R, Huang GC, Persaud SJ. Fine tuning of insulin secretion by release of nerve growth factor from mouse and human islet β-cells. Mol Cell Endocrinol 2016; 436:23-32. [PMID: 27424144 DOI: 10.1016/j.mce.2016.07.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/13/2016] [Accepted: 07/11/2016] [Indexed: 11/21/2022]
Abstract
Nerve growth factor (NGF) is a protein required for neuronal development that also has regulatory functions in non-neuronal cells. Both NGF and its membrane receptors trkA and p75(NTR) are expressed by islet β-cells. In this study we dynamically profiled NGF secretion from islets and used selective trkA and p75(NTR) inhibitors to identify the role of endogenous NGF in β-cell stimulus-secretion coupling. NGF secretion from mouse islets was transient and did not accompany the sustained second phase of glucose-induced insulin secretion. Despite being present in human islets, NGF was not released at sufficient levels to be quantified. Inhibition of NGF signaling through trkA and p75(NTR) increased basal insulin secretion from both human and mouse islets, but impaired glucose-stimulated insulin secretion. These data support a role for islet NGF in fine-tuning insulin secretion, to both maintain a low basal level of insulin output and contribute to the biphasic secretory response to glucose.
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Affiliation(s)
- Attilio Pingitore
- Diabetes Research Group, Diabetes & Nutritional Sciences Division, King's College London, Guy's Campus, SE1 1UL, London, United Kingdom
| | - Maria Cristina Caroleo
- Department of Pharmacy, Nutritional and Health Sciences, University of Calabria, Via Savinio, 87036, Rende, Italy
| | - Erika Cione
- Department of Pharmacy, Nutritional and Health Sciences, University of Calabria, Via Savinio, 87036, Rende, Italy
| | - Ramon Castañera Gonzalez
- Department of General Surgery, Rio Carrión Hospital, University Hospital Complex of Palencia, 34005, Palencia, Spain
| | - Guo Cai Huang
- Diabetes Research Group, Diabetes & Nutritional Sciences Division, King's College London, Guy's Campus, SE1 1UL, London, United Kingdom
| | - Shanta J Persaud
- Diabetes Research Group, Diabetes & Nutritional Sciences Division, King's College London, Guy's Campus, SE1 1UL, London, United Kingdom.
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22
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Kashyap M, Pore S, Yoshimura N, Tyagi P. Constitutive expression Of NGF And P75(NTR) affected by bladder distension and NGF antisense treatment. Life Sci 2016; 148:93-8. [PMID: 26855002 DOI: 10.1016/j.lfs.2016.02.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/20/2016] [Accepted: 02/03/2016] [Indexed: 12/16/2022]
Abstract
AIMS It is known that bladder exposure to noxious stimuli elicits nerve growth factor (NGF) expression with region wise differences. Here, we investigated the effect of bladder distension (cystometry) and bladder wall injection of NGF antisense oligonucleotide (ODN) together as well as separately on spontaneous (constitutive) expression of NGF and its cognate p75 neurotrophin receptor (p75(NTR)). METHOD Under isoflurane anesthesia, either 15μg of protamine sulfate (vehicle) alone or complexed with 1.5μg of NGF antisense or scrambled ODN was injected (10μL) at 4 sites in bladder wall of 24 adult female Sprague-Dawley rats and 6 rats were left untreated (n=30). Under urethane anesthesia, cystometry (CMG) was performed in treated and control rats. Fluorescent ODN and NGF/p75(NTR) expression was localized in harvested tissue. KEY FINDINGS Complexation of ODN with protamine was essential for the retention of ODN in bladder tissue as the uncomplexed ODN was untraceable after injection. Bladder distension from CMG raised the expression of NGF and p75(NTR) relative to CMG naïve rats. The groups treated with vehicle, scrambled and antisense ODN were indistinct with regard to CMG parameters, but the intense immunoreactivity of NGF and p75(NTR) seen in the vehicle and scrambled ODN groups was reduced following treatment with NGF antisense. SIGNIFICANCE The constitutive expression of NGF and p75(NTR) is responsive to bladder distension and administration of NGF antisense. Complexation with protamine reduces the clearance of ODN and demonstrates the potential of ODN nanoparticles as an option for reducing the inducible NGF expression in OAB patients following intradetrusor injection.
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Affiliation(s)
- Mahendra Kashyap
- Department of Urology, University of Pittsburgh, Pittsburgh, United States
| | - Subrata Pore
- Department of Urology, University of Pittsburgh, Pittsburgh, United States
| | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh, Pittsburgh, United States
| | - Pradeep Tyagi
- Department of Urology, University of Pittsburgh, Pittsburgh, United States.
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Gürgör P, Pallesen LT, Johnsen L, Ulrichsen M, de Jong IEM, Vaegter CB. Neuronal death in the dorsal root ganglion after sciatic nerve injury does not depend on sortilin. Neuroscience 2016; 319:1-8. [PMID: 26812033 DOI: 10.1016/j.neuroscience.2016.01.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/12/2016] [Accepted: 01/13/2016] [Indexed: 01/20/2023]
Abstract
Injury to the sciatic nerve induces loss of sensory neurons in the affected dorsal root ganglia (DRGs). Previous studies have suggested the involvement of the neurotrophin receptors p75 neurotrophin receptor (p75(NTR)) and sortilin, proposing that sensory neuron subpopulations undergo proneurotrophin-induced apoptosis in a similar manner to what can be observed in the CNS following injury. To further investigate this hypothesis we induced sciatic nerve injury in sortilin-deficient mice, thereby preventing apoptotic signaling of proneurotrophins via the sortilin-p75(NTR) receptor complex. Using an unbiased stereological approach we found that loss of sortilin did not prevent the injury-induced loss of DRG neurons. This result demonstrates that previous findings linking p75(NTR) and proneurotrophins to loss of sensory neurons need to involve sortilin-independent pathways and suggests that proneurotrophins may elicit different functions in the CNS and PNS.
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Affiliation(s)
- P Gürgör
- The Lundbeck Foundation Research Center Mind, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, Aarhus DK-8000, Denmark
| | - L T Pallesen
- The Lundbeck Foundation Research Center Mind, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, Aarhus DK-8000, Denmark
| | - L Johnsen
- The Lundbeck Foundation Research Center Mind, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, Aarhus DK-8000, Denmark
| | - M Ulrichsen
- The Lundbeck Foundation Research Center Mind, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, Aarhus DK-8000, Denmark
| | - I E M de Jong
- H. Lundbeck A/S, Division of Neurodegeneration, Ottiliavej 9, Valby DK-2500, Denmark
| | - C B Vaegter
- The Lundbeck Foundation Research Center Mind, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, Aarhus DK-8000, Denmark.
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Orefice LL, Shih CC, Xu H, Waterhouse EG, Xu B. Control of spine maturation and pruning through proBDNF synthesized and released in dendrites. Mol Cell Neurosci 2015; 71:66-79. [PMID: 26705735 DOI: 10.1016/j.mcn.2015.12.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 12/11/2015] [Accepted: 12/15/2015] [Indexed: 12/27/2022] Open
Abstract
Excess synapses formed during early postnatal development are pruned over an extended period, while the remaining synapses mature. Synapse pruning is critical for activity-dependent refinement of neuronal connections and its dysregulation has been found in neurodevelopmental disorders such as autism spectrum disorders; however, the mechanism underlying synapse pruning remains largely unknown. As dendritic spines are the postsynaptic sites for the vast majority of excitatory synapses, spine maturation and pruning are indicators for maturation and elimination of these synapses. Our previous studies have found that dendritically localized mRNA for brain-derived neurotrophic factor (BDNF) regulates spine maturation and pruning. Here we investigated the mechanism by which dendritic Bdnf mRNA, but not somatically restricted Bdnf mRNA, promotes spine maturation and pruning. We found that neuronal activity stimulates both translation of dendritic Bdnf mRNA and secretion of its translation product mainly as proBDNF. The secreted proBDNF promotes spine maturation and pruning, and its effect on spine pruning is in part mediated by the p75(NTR) receptor via RhoA activation. Furthermore, some proBDNF is extracellularly converted to mature BDNF and then promotes maturation of stimulated spines by activating Rac1 through the TrkB receptor. In contrast, translation of somatic Bdnf mRNA and the release of its translation product mainly as mature BDNF are independent of action potentials. These results not only reveal a biochemical pathway regulating synapse pruning, but also suggest that BDNF synthesized in the soma and dendrites is released through distinct secretory pathways.
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Affiliation(s)
- Lauren L Orefice
- Department of Neuroscience, The Scripps Research Institute Florida, 130 Scripps Way, Jupiter, FL 33458, USA; Department of Pharmacology and Physiology, Georgetown University Medical Center, 3900 Reservoir Road NW, Washington, DC 20057, USA
| | - Chien-Cheng Shih
- Department of Neuroscience, The Scripps Research Institute Florida, 130 Scripps Way, Jupiter, FL 33458, USA; Department of Pharmacology and Physiology, Georgetown University Medical Center, 3900 Reservoir Road NW, Washington, DC 20057, USA
| | - Haifei Xu
- Department of Neuroscience, The Scripps Research Institute Florida, 130 Scripps Way, Jupiter, FL 33458, USA
| | - Emily G Waterhouse
- Department of Pharmacology and Physiology, Georgetown University Medical Center, 3900 Reservoir Road NW, Washington, DC 20057, USA
| | - Baoji Xu
- Department of Neuroscience, The Scripps Research Institute Florida, 130 Scripps Way, Jupiter, FL 33458, USA; Department of Pharmacology and Physiology, Georgetown University Medical Center, 3900 Reservoir Road NW, Washington, DC 20057, USA.
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25
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Zhu L, Pan QX, Zhang XJ, Xu YM, Chu YJ, Liu N, Lv P, Zhang GX, Kan QC. Protective effects of matrine on experimental autoimmune encephalomyelitis via regulation of ProNGF and NGF signaling. Exp Mol Pathol 2015; 100:337-43. [PMID: 26681653 DOI: 10.1016/j.yexmp.2015.12.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 12/06/2015] [Indexed: 10/22/2022]
Abstract
Inflammation, demyelination, oligodendrocyte (OLG) death, and axonal degeneration are primary characteristics of multiple sclerosis (MS) and its animal model, experimental autoimmune encephalomyelitis (EAE). OLGs generate myelin sheaths that surround axons, while damage to OLGs leads to demyelination and neurological functional deficit. Matrine (MAT), a quinolizidine alkaloid derived from the herb Radix Sophorae Flave, has been recently found to effectively ameliorate clinical signs in EAE. Its therapeutic mechanism has, however, not been completely elucidated. In the present study, we found that MAT retarded the disease process, attenuated the clinical severity of EAE rats, ameliorated inflammation and demyelination, and suppressed the apoptosis of OLGs in the central nervous system (CNS) of EAE rats. In addition, MAT markedly blocked increased expression of the proNGF-p75(NTR) death signaling complex, which is known to mediate OLG death in EAE animals. At the same time, MAT also prevented a decrease in the levels of NGF and its receptor TrkA, which together mediate the cell survival pathway and differentiation of OLGs. ProNGF, NGF, and the downstream effector proteins play an important role in the growth, differentiation, and apoptosis of OLGs as well as the reparative response to neuronal damage. These findings thus indicate that MAT improves clinical severity of EAE in part by reducing OLG apoptosis via restoring the ratios of proNGF:NGF and the respective receptors p75(NTR):TrkA in vivo. Taken together, these results suggest that MAT may be a promising agent for MS treatment based on its protective effect on OLGs.
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Affiliation(s)
- Lin Zhu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Qing-xia Pan
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Xiao-Jian Zhang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Yu-Ming Xu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Yao-juan Chu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Nan Liu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Peng Lv
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Guang-Xian Zhang
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | - Quan-Cheng Kan
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China.
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26
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Sheffield KSA, Kennedy AE, Scott JA, Ross GM. Characterizing nerve growth factor- p75(NTR) interactions and small molecule inhibition using surface plasmon resonance spectroscopy. Anal Biochem 2015; 493:21-6. [PMID: 26435172 DOI: 10.1016/j.ab.2015.09.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/18/2015] [Accepted: 09/23/2015] [Indexed: 12/24/2022]
Abstract
Nerve growth factor (NGF) is critical for the proliferation, differentiation, and survival of neurons through its binding to the p75(NTR) and TrkA receptors. Dysregulation of NGF has been implicated in several pathologies, including neurodegeneration (i.e., Parkinson's and Alzheimer's diseases) and both inflammatory and neuropathic pain states. Therefore, small molecule inhibitors that block NGF-receptor interactions have significant therapeutic potential. Small molecule antagonists ALE-0540, PD90780, Ro 08-2750, and PQC 083 have all been reported to inhibit NGF from binding the TrkA receptor. Interestingly, the characterization of the ability of these molecules to block NGF-p75(NTR) interactions has not been performed. In addition, the inhibitory action of these molecules has never been evaluated using surface plasmon resonance (SPR) spectroscopy, which has been proven to be highly useful in drug discovery applications. In the current study, we used SPR biosensors to characterize the binding of NGF to the p75(NTR) receptor in addition to characterizing the inhibitory potential of the known NGF antagonists. The results of this study provide the first evaluation of the ability of these compounds to block NGF binding to p75(NTR) receptor. In addition, only PD90780 was effective at inhibiting the interaction of NGF with p75(NTR), suggesting receptor selectivity between known NGF inhibitors.
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Affiliation(s)
| | - Allison E Kennedy
- Department of Biomolecular Sciences, Laurentian University, Sudbury, Ontario P3E 2C6, Canada
| | - John A Scott
- Department of Biomolecular Sciences, Laurentian University, Sudbury, Ontario P3E 2C6, Canada; Bharti School of Engineering, Laurentian University, Sudbury, Ontario P3E 2C6, Canada; Northern Ontario School of Medicine, Sudbury, Ontario P3E 2C6, Canada
| | - Gregory M Ross
- Department of Biology, Laurentian University, Sudbury, Ontario P3E 2C6, Canada; Department of Biomolecular Sciences, Laurentian University, Sudbury, Ontario P3E 2C6, Canada; Northern Ontario School of Medicine, Sudbury, Ontario P3E 2C6, Canada.
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27
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Ma Q, Yang J, Li T, Milner TA, Hempstead BL. Selective reduction of striatal mature BDNF without induction of proBDNF in the zQ175 mouse model of Huntington's disease. Neurobiol Dis 2015; 82:466-477. [PMID: 26282324 PMCID: PMC4819334 DOI: 10.1016/j.nbd.2015.08.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 08/02/2015] [Accepted: 08/12/2015] [Indexed: 02/02/2023] Open
Abstract
Huntington's disease (HD) is a neurodegenerative disorder characterized by massive loss of medium spiny neurons in the striatum. However, the mechanisms by which mutant huntingtin leads to this selective neuronal death remain incompletely understood. Brain-derived neurotrophic factor (BDNF) has been shown to be neuroprotective on HD striatal neurons both in vitro and in vivo. ProBDNF, the precursor of mature BDNF (mBDNF), also can be secreted but promotes apoptosis of neurons expressing p75(NTR) and sortilin receptors. Although a reduction of total striatal BDNF protein has been reported in HD patients and mouse models, it remains unclear whether conversion of proBDNF to mBDNF is altered in HD, and whether the proBDNF receptors, p75(NTR) and sortilin are dysregulated, leading to impaired striatal neuron survival. To test these hypotheses, we generated bdnf-HA knock-in (KI) mice on the zQ175 HD background to accurately quantitate the levels of both proBDNF and mBDNF in the HD striatum. In aged zQ175 HD mice, we observed a significant loss of mBDNF and decreased TrkB activation, but no increase of proBDNF or p75(NTR) levels either in the sensorimotor cortex or the striatum. However, immunoreactivities of p75(NTR) and sortilin receptor are both increased in immature striatal oligodendrocytes, which associate with significant myelin defects in the HD striatum. Taken together, the present study indicates that diminished mature BDNF trophic signaling through the TrkB receptor, rather than an induction in proBDNF, is a main contributing factor to the vulnerability of striatal neurons in the zQ175 HD mouse model.
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Affiliation(s)
- Qian Ma
- Graduate Program of Neuroscience, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA
| | - Jianmin Yang
- Department of Medicine, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA
| | - Thomas Li
- Department of Medicine, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA
| | - Teresa A Milner
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA; Laboratory of Neuroendocrinology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA
| | - Barbara L Hempstead
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA; Department of Medicine, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA.
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28
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Ventresca EM, Lecht S, Jakubowski P, Chiaverelli RA, Weaver M, Del Valle L, Ettinger K, Gincberg G, Priel A, Braiman A, Lazarovici P, Lelkes PI, Marcinkiewicz C. Association of p75(NTR) and α9β1 integrin modulates NGF-dependent cellular responses. Cell Signal 2015; 27:1225-36. [PMID: 25748048 DOI: 10.1016/j.cellsig.2015.02.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 02/06/2015] [Accepted: 02/23/2015] [Indexed: 01/10/2023]
Abstract
Direct interaction of α9β1 integrin with nerve growth factor (NGF) has been previously reported to induce pro-proliferative and pro-survival activities of non-neuronal cells. We investigated participation of p75(NTR) in α9β1 integrin-dependent cellular response to NGF stimulation. Using selective transfection of glioma cell lines with these receptors, we showed a strong, cation-independent association of α9 integrin subunit with p75(NTR) on the cellular membrane by selective immunoprecipitation experiments. The presence of the α9/p75(NTR) complex increases NGF-dependent cell adhesion, proliferation and migration. Other integrin subunits including β1 were not found in complex with p75(NTR). FRET analysis indicated that p75(NTR) and α9 integrin subunit are not closely associated through their cytoplasmic domains, most probably because of the molecular interference with other cytoplasmic proteins such as paxillin. Interaction of α9β1 integrin with another ligand, VCAM-1 was not modulated by the p75(NTR). α9/p75(NTR) complex elevated NGF-dependent activation of MAPK Erk1/2 arty for integrin that may create active complexes with other types of receptors belonging to the TNF superfamily.
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Affiliation(s)
- Erin M Ventresca
- CoE Department of Bioengineering, Temple University, Philadelphia, PA, USA
| | - Shimon Lecht
- CoE Department of Bioengineering, Temple University, Philadelphia, PA, USA
| | - Piotr Jakubowski
- CoE Department of Bioengineering, Temple University, Philadelphia, PA, USA
| | | | - Michael Weaver
- Department of Neurosurgery, Temple University Hospital, Philadelphia, PA, USA
| | - Luis Del Valle
- Department of Medicine and Pathology, Stanley Scott Cancer Center, Louisiana State University, New Orleans, LA, USA
| | - Keren Ettinger
- School of Pharmacy, Institute for Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Galit Gincberg
- School of Pharmacy, Institute for Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Avi Priel
- School of Pharmacy, Institute for Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Alex Braiman
- The Shraga Segal Department of Microbiology, Immunology and Genetics, The Faculty of Health Science, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Philip Lazarovici
- CoE Department of Bioengineering, Temple University, Philadelphia, PA, USA; School of Pharmacy, Institute for Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Peter I Lelkes
- CoE Department of Bioengineering, Temple University, Philadelphia, PA, USA
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Friesland A, Weng Z, Duenas M, Massa SM, Longo FM, Lu Q. Amelioration of cisplatin-induced experimental peripheral neuropathy by a small molecule targeting p75 NTR. Neurotoxicology 2014; 45:81-90. [PMID: 25277379 PMCID: PMC4268328 DOI: 10.1016/j.neuro.2014.09.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 08/18/2014] [Accepted: 09/22/2014] [Indexed: 12/18/2022]
Abstract
Cisplatin is an effective and widely used first-line chemotherapeutic drug for treating cancers. However, many patients sustain cisplatin-induced peripheral neuropathy (CIPN), often leading to a reduction in drug dosages or complete cessation of treatment altogether. Therefore, it is important to understand cisplatin mechanisms in peripheral nerve tissue mediating its toxicity and identify signaling pathways for potential intervention. Rho GTPase activation is increased following trauma in several models of neuronal injury. Thus, we investigated whether components of the Rho signaling pathway represent important neuroprotective targets with the potential to ameliorate CIPN and thereby optimize current chemotherapy treatment regimens. We have developed a novel CIPN model in the mouse. Using this model and primary neuronal culture, we determined whether LM11A-31, a small-molecule, orally bioavailable ligand of the p75 neurotrophin receptor (p75(NTR)), can modulate Rho GTPase signaling and reduce CIPN. Von Frey filament analysis of sural nerve function showed that LM11A-31 treatment prevented decreases in peripheral nerve sensation seen with cisplatin treatment. Morphometric analysis of harvested sural nerves revealed that cisplatin-induced abnormal nerve fiber morphology and the decreases in fiber area were alleviated with concurrent LM11A-31 treatment. Cisplatin treatment increased RhoA activity accompanied by the reduced tyrosine phosphorylation of SHP2, which was reversed by LM11A-31. LM11A-31 also countered the effects of calpeptin, which activated RhoA by inhibiting SHP2 tyrosine phosphatase. Therefore, suppression of RhoA signaling by LM11A-31 that modulates p75(NTR) or activates SHP2 tyrosine phosphatase downstream of the NGF receptor enhances neuroprotection in experimental CIPN in mouse model.
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Affiliation(s)
- Amy Friesland
- Department of Anatomy and Cell Biology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; Leo Jenkins Cancer Center, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA
| | - Zhiying Weng
- Department of Anatomy and Cell Biology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Maria Duenas
- Department of Anatomy and Cell Biology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA
| | - Stephen M Massa
- Department of Neurology Veterans Administration Medical Center and University of California at San Francisco, San Francisco, CA 94121, USA
| | - Frank M Longo
- Department of Neurology and Neurological Science, Stanford University, Stanford, CA 94305, USA
| | - Qun Lu
- Department of Anatomy and Cell Biology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; Leo Jenkins Cancer Center, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA.
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30
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Akiyama Y, Mikami Y, Watanabe E, Watanabe N, Toriumi T, Takahashi T, Komiyama K, Isokawa K, Shimizu N, Honda MJ. The P75 neurotrophin receptor regulates proliferation of the human MG63 osteoblast cell line. Differentiation 2014; 87:111-8. [PMID: 24582280 DOI: 10.1016/j.diff.2014.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 01/17/2014] [Indexed: 02/07/2023]
Abstract
The 75 kDa transmembrane protein, p75(NTR), is a marker of mesenchymal stem cells (MSCs). Isolated MSCs are capable of differentiating into osteoblasts, but the molecular function of p75(NTR) in MSCs and osteoblasts is poorly understood. The aim of this study was to examine the function of p75(NTR) in the human MG63 osteoblast cell line compared to the murine MC3T3E-1 pre-osteoblast cell line. MG63 cells and MC3T3-E1 cells expressing exogenous p75(NTR) protein (denoted as p75-MG63 and p75GFP-E1, respectively) were generated to compare osteogenic differentiation and cell proliferation abilities. Overexpression of p75(NTR) induced alkaline phosphatase activity and the mRNA expression of osteoblast-related genes such as osterix and bone sialoprotein in both p75-MG63 and p75GFP-E1. Interestingly, exogenous p75(NTR) stimulated cell proliferation and cell cycle progression in p75GFP-E1, but not in p75-MG63. To elucidate any different effects of p75(NTR) expression on osteogenic differentiation and cell proliferation, we examined the mRNA expression of tropomyosin receptor kinase (trk) genes (trkA, trkB, trkC) and Nogo receptor (NgR), which are binding partners of p75(NTR). Although trkA, trkB, and trkC were detected in both p75-MG63 and p75GFP-E1, only NgR was detected in p75-MG63. We then used the K252a inhibitor of the trks to identify the signaling pathway for osteogenic differentiation and cell proliferation. Inhibition of trks by K252a suppressed p75(NTR)-mediated osteogenic differentiation of p75GFP-E1, whereas deletion of the GDI domain in P75(NTR) from the p75-MG63 produced enhanced cell proliferation compared to p75-MG63. These results suggest that p75(NTR) signaling associated with trk receptors promotes both cell proliferation and osteoblast differentiation, but that p75(NTR)-mediated proliferation may be suppressed by signaling from the p75(NTR)/NgR complex.
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Affiliation(s)
- Yuko Akiyama
- Nihon University Graduate School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Yoshikazu Mikami
- Department of Pathology, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Eri Watanabe
- Laboratory of Diagnostic Medicine, The Institute of Medical Science, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Nobukazu Watanabe
- Laboratory of Diagnostic Medicine, The Institute of Medical Science, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Taku Toriumi
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Tomihisa Takahashi
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Kazuo Komiyama
- Department of Pathology, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Keitaro Isokawa
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Noriyoshi Shimizu
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Orthodontics, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Masaki J Honda
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
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Choi S, Friedman WJ. Interleukin-1β enhances neuronal vulnerability to proNGF-mediated apoptosis by increasing surface expression of p75(NTR) and sortillin. Neuroscience 2014; 257:11-9. [PMID: 24211304 DOI: 10.1016/j.neuroscience.2013.10.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 10/08/2013] [Accepted: 10/24/2013] [Indexed: 12/28/2022]
Abstract
Many types of injury such as seizure, ischemia, and oxidative stress cause upregulation of the p75 neurotrophin receptor (p75(NTR)) in brain neurons, where it promotes apoptosis, however the mechanism by which p75(NTR) is regulated under these conditions is not well understood. Proinflammatory cytokines such as interleukin-1β (IL-1β) are highly produced under these injury conditions and, in particular, are expressed rapidly in the rat hippocampus after seizure. IL-1β is known to increase neuronal vulnerability under many conditions, although it does not directly induce neuronal death. Recently, we have shown that these cytokines regulate p75(NTR) induction both in neurons and astrocytes in vitro. Here, we show that IL-1β infusion into the brain induces p75(NTR) in neurons of the CA1 area of the hippocampus. While IL-1β induction of p75(NTR) is not sufficient to induce cell death, we demonstrate that IL-1β primes the neurons by recruiting p75(NTR) and its coreceptor sortilin to the cell surface, making the neurons more vulnerable to subsequent challenge by proNGF. These results suggest a mechanism by which IL-1β exacerbates neuronal death following injury.
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Rostami E, Krueger F, Plantman S, Davidsson J, Agoston D, Grafman J, Risling M. Alteration in BDNF and its receptors, full-length and truncated TrkB and p75(NTR) following penetrating traumatic brain injury. Brain Res 2013; 1542:195-205. [PMID: 24192075 DOI: 10.1016/j.brainres.2013.10.047] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 10/16/2013] [Accepted: 10/24/2013] [Indexed: 01/03/2023]
Abstract
The evidence that BDNF is involved in neuroprotection, neuronal repair and recovery after traumatic brain injury (TBI) is substantial. We have previously shown that the polymorphism of the human BDNF gene predicts cognitive recovery and outcome following penetrating TBI. The distribution of expression of BDNF and its receptors after penetrating TBI has not been investigated. In this study we examined the expression of these genes in a rat model of penetrating TBI. The injury is produced by a controlled penetration of a 2mm thick needle-shaped object, which is accelerated with a pellet from an air gun. We used in situ hybridization and investigated the mRNA expression of BDNF and its receptors: the full-length and the truncated TrkB and p75(NTR), from 1 day to 8 weeks following penetrating TBI. In addition, the protein level of BDNF in frontal cortex and hippocampus was measured by reverse phase protein microarray (RPPM). The mRNA expression of BDNF and its receptors decreased in the hippocampus in the border zone ipsilateral to the injury while there was an increase in mRNA expression at the contralateral side. The increase in BDNF mRNA expression in the hippocampus was sustained for 2 weeks following injury, with the highest expression noted in the CA3 cell layer. Furthermore, the protein analysis by RPPM showed increased levels of BDNF in the frontal cortex and the hippocampus up to 2 weeks after TBI. At 8 weeks following injury there was an intense labeling of the truncated TrkB receptor and the p75(NTR) in the area surrounding the cavity. Our study is the first report on the expression of BDNF and its receptors following penetrating TBI and suggests that their expression is altered long after the acute phase of injury. Further studies are needed to investigate if the late expressions of these receptors are beneficial or deleterious. In either case it indicates the possibility to influence the recovery after brain injury during the chronic phase and the development of treatments that may improve the outcome of TBI patients.
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Affiliation(s)
- Elham Rostami
- Department of Neuroscience, Karolinska Institutet, Retzius väg 8, S-171 77 Stockholm, Sweden(1); Department of Neuroscience and Neurosurgery, Uppsala University Hospital, Uppsala, Sweden.
| | - Frank Krueger
- Department of Molecular Neuroscience, George Mason University, Fairfax, VA, USA; Department of Psychology, George Mason University, Fairfax, VA, USA
| | - Stefan Plantman
- Department of Neuroscience, Karolinska Institutet, Retzius väg 8, S-171 77 Stockholm, Sweden(1)
| | - Johan Davidsson
- Division of Vehicle Safety, Chalmers University of Technology, Gothenburg, Sweden
| | - Denes Agoston
- Department of Anatomy, Physiology and Genetics, Uniformed Services University, Bethesda, MD, USA
| | - Jordan Grafman
- Brain Injury Research, Cognitive Neuroscience Laboratory, Rehabilitation Institute of Chicago, IL, USA
| | - Mårten Risling
- Department of Neuroscience, Karolinska Institutet, Retzius väg 8, S-171 77 Stockholm, Sweden(1)
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Lorentz CU, Parrish DC, Alston EN, Pellegrino MJ, Woodward WR, Hempstead BL, Habecker BA. Sympathetic denervation of peri-infarct myocardium requires the p75 neurotrophin receptor. Exp Neurol 2013; 249:111-9. [PMID: 24013014 PMCID: PMC3826885 DOI: 10.1016/j.expneurol.2013.08.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 08/23/2013] [Accepted: 08/27/2013] [Indexed: 12/22/2022]
Abstract
Development of cardiac sympathetic heterogeneity after myocardial infarction contributes to ventricular arrhythmias and sudden cardiac death. Regions of sympathetic hyperinnervation and denervation appear in the viable myocardium beyond the infarcted area. While elevated nerve growth factor (NGF) is implicated in sympathetic hyperinnervation, the mechanisms underlying denervation are unknown. Recent studies show that selective activation of the p75 neurotrophin receptor (p75(NTR)) in sympathetic neurons causes axon degeneration. We used mice that lack p75(NTR) to test the hypothesis that activation of p75(NTR) causes peri-infarct sympathetic denervation after cardiac ischemia-reperfusion. Wild type hearts exhibited sympathetic denervation adjacent to the infarct 24h and 3 days after ischemia-reperfusion, but no peri-infarct sympathetic denervation occurred in p75(NTR)-/- mice. Sympathetic hyperinnervation was found in the distal peri-infarct myocardium in both genotypes 3 days after MI, and hyperinnervation was increased in the p75(NTR)-/- mice. By 7 days after ischemia-reperfusion, cardiac sympathetic innervation density returned back to sham-operated levels in both genotypes, indicating that axonal pruning did not require p75(NTR). Prior studies revealed that proNGF is elevated in the damaged left ventricle after ischemia-reperfusion, as is mRNA encoding brain-derived neurotrophic factor (BDNF). ProNGF and BDNF preferentially bind p75(NTR) rather than TrkA on sympathetic neurons. Immunohistochemistry using Bdnf-HA mice confirmed the presence of BDNF or proBDNF in the infarct after ischemia-reperfusion. Thus, at least two p75(NTR) ligands are elevated in the left ventricle after ischemia-reperfusion where they may stimulate p75(NTR)-dependent denervation of peri-infarct myocardium. In contrast, NGF-induced sympathetic hyperinnervation in the distal peri-infarct ventricle is attenuated by p75(NTR).
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Affiliation(s)
- Christina U. Lorentz
- Department of Physiology and Pharmacology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd., Portland, Oregon 97239, USA
| | - Diana C. Parrish
- Department of Physiology and Pharmacology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd., Portland, Oregon 97239, USA
| | - Eric N. Alston
- Department of Physiology and Pharmacology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd., Portland, Oregon 97239, USA
| | - Michael J. Pellegrino
- Department of Physiology and Pharmacology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd., Portland, Oregon 97239, USA
| | - William R. Woodward
- Department of Neurology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd., Portland, Oregon 97239, USA
| | - Barbara L. Hempstead
- Division of Hematology and Medical Oncology, Department of Medicine, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA
| | - Beth A. Habecker
- Department of Physiology and Pharmacology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd., Portland, Oregon 97239, USA
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Khodorova A, Nicol GD, Strichartz G. The p75NTR signaling cascade mediates mechanical hyperalgesia induced by nerve growth factor injected into the rat hind paw. Neuroscience 2013; 254:312-23. [PMID: 24095693 DOI: 10.1016/j.neuroscience.2013.09.046] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 09/13/2013] [Accepted: 09/24/2013] [Indexed: 01/25/2023]
Abstract
Nerve growth factor (NGF) augments the excitability of isolated rat sensory neurons through activation of the p75 neurotrophin receptor (p75(NTR)) and its downstream sphingomyelin signaling cascade, wherein neutral sphingomyelinase(s) (nSMase), ceramide, and the atypical protein-kinase C (aPKC), protein-kinase M zeta (PKMζ), are key mediators. Here we examined these same receptor-pathways in vivo for their role in mechanical hyperalgesia from exogenous NGF. Mechanical sensitivity was tested by the number of paw withdrawals in response to 10 stimuli (PWF=n/10) by a 4-g von Frey hair (VFH, testing "allodynia") and by 10 and 15g VFHs (testing "hyperalgesia"). NGF (500ng/10μL) injected into the male rat's plantar hind paw induced long-lasting ipsilateral mechanical hypersensitivity. Mechano-hypersensitivity, relative to baseline responses and to those of the contralateral paw, developed by 0.5-1.5h and remained elevated at least for 21-24h, Acute intraplantar pre-treatment with nSMase inhibitors, glutathione (GSH) or GW4869, prevented the acute hyperalgesia from NGF (at 1.5h) but not that at 24h. A single injection of N-acetyl sphingosine (C2-ceramide), simulating the ceramide produced by nSMase activity, induced ipsilateral allodynia that persisted for 24h, and transient hyperalgesia that resolved by 2h. Intraplantar injection of hydrolysis-resistant mPro-NGF, selective for the p75(NTR) over the tyrosine kinase (TrkA) receptor, gave very similar results to NGF and was susceptible to the same inhibitors. Hyperalgesia from both NGF and mPro-NGF was prevented by paw pre-injection with blocking antibodies to rat p75(NTR) receptor. Finally, intraplantar (1day before NGF) injection of mPSI, the myristolated pseudosubstrate inhibitor of PKCζ/PKMζ, decreased the hyperalgesia resulting from NGF or C2-ceramide, although scrambled mPSI was ineffective. The findings indicate that mechano-hypersensitivity from peripheral NGF involves the sphingomyelin signaling cascade activated via p75(NTR), and that a peripheral aPKC is essential for this sensitization.
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Affiliation(s)
- A Khodorova
- Pain Research Center, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
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35
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Armato U, Chiarini A, Chakravarthy B, Chioffi F, Pacchiana R, Colarusso E, Whitfield JF, Dal Prà I. Calcium-sensing receptor antagonist (calcilytic) NPS 2143 specifically blocks the increased secretion of endogenous Aβ42 prompted by exogenous fibrillary or soluble Aβ25-35 in human cortical astrocytes and neurons-therapeutic relevance to Alzheimer's disease. Biochim Biophys Acta 2013; 1832:1634-52. [PMID: 23628734 DOI: 10.1016/j.bbadis.2013.04.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 03/28/2013] [Accepted: 04/18/2013] [Indexed: 11/17/2022]
Abstract
The "amyloid-β (Aβ) hypothesis" posits that accumulating Aβ peptides (Aβs) produced by neurons cause Alzheimer's disease (AD). However, the Aβs contribution by the more numerous astrocytes remains undetermined. Previously we showed that fibrillar (f)Aβ25-35, an Aβ42 proxy, evokes a surplus endogenous Aβ42 production/accumulation in cortical adult human astrocytes. Here, by using immunocytochemistry, immunoblotting, enzymatic assays, and highly sensitive sandwich ELISA kits, we investigated the effects of fAβ25-35 and soluble (s)Aβ25-35 on Aβ42 and Aβ40 accumulation/secretion by human cortical astrocytes and HCN-1A neurons and, since the calcium-sensing receptor (CaSR) binds Aβs, their modulation by NPS 2143, a CaSR allosteric antagonist (calcilytic). The fAβ25-35-exposed astrocytes and surviving neurons produced, accumulated, and secreted increased amounts of Aβ42, while Aβ40 also accrued but its secretion was unchanged. Accordingly, secreted Aβ42/Aβ40 ratio values rose for astrocytes and neurons. While slightly enhancing Aβ40 secretion by fAβ25-35-treated astrocytes, NPS 2143 specifically suppressed the fAβ25-35-elicited surges of endogenous Aβ42 secretion by astrocytes and neurons. Therefore, NPS 2143 addition always kept Aβ42/Aβ40 values to baseline or lower levels. Mechanistically, NPS 2143 decreased total CaSR protein complement, transiently raised proteasomal chymotrypsin activity, and blocked excess NO production without affecting the ongoing increases in BACE1/β-secretase and γ-secretase activity in fAβ25-35-treated astrocytes. Compared to fAβ25-35, sAβ25-35 also stimulated Aβ42 secretion by astrocytes and neurons and NPS 2143 specifically and wholly suppressed this effect. Therefore, since NPS 2143 thwarts any Aβ/CaSR-induced surplus secretion of endogenous Aβ42 and hence further vicious cycles of Aβ self-induction/secretion/spreading, calcilytics might effectively prevent/stop the progression to full-blown AD.
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Affiliation(s)
- Ubaldo Armato
- Department of Life and Reproduction Sciences, University of Verona Medical School, Verona, Italy.
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Sessler T, Healy S, Samali A, Szegezdi E. Structural determinants of DISC function: new insights into death receptor-mediated apoptosis signalling. Pharmacol Ther 2013; 140:186-99. [PMID: 23845861 DOI: 10.1016/j.pharmthera.2013.06.009] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 06/14/2013] [Indexed: 12/15/2022]
Abstract
Death receptors are members of the tumour necrosis factor (TNF) receptor superfamily characterised by an ~80 amino acid long alpha-helical fold, termed the death domain (DD). Death receptors diversified during early vertebrate evolution indicating that the DD fold has plasticity and specificity that can be easily adjusted to attain additional functions. Eight members of the death receptor family have been identified in humans, which can be divided into four structurally homologous groups or clades, namely: the p75(NTR) clade (consisting of ectodysplasin A receptor, death receptor 6 (DR6) and p75 neurotrophin (NTR) receptor); the tumour necrosis factor receptor 1 clade (TNFR1 and DR3), the CD95 clade (CD95/FAS) and the TNF-related apoptosis-inducing ligand receptor (TRAILR) clade (TRAILR1 and TRAILR2). Receptors in the same clade participate in similar processes indicating that structural diversification enabled functional specialisation. On the surface of nearly all human cells multiple death receptors are expressed, enabling the cell to respond to a plethora of external signals. Activation of different death receptors converges on the activation of three main signal transduction pathways: nuclear factor-κB-mediated differentiation or inflammation, mitogen-associated protein kinase-mediated stress response and caspase-mediated apoptosis. While the ability to induce cell death is true for nearly all DRs, the FAS and TRAILR clades have specialised in inducing cell death. Here we summarise recent discoveries about the molecular regulation and structural requirements of apoptosis induction by death receptors and discuss how this information can be used to better explain the biological functions, similarities and distinguishing features of death receptors.
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Affiliation(s)
- Tamas Sessler
- Apoptosis Research Centre, National University of Ireland, Galway, Ireland
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Tsai T, Klausmeyer A, Conrad R, Gottschling C, Leo M, Faissner A, Wiese S. 7,8-Dihydroxyflavone leads to survival of cultured embryonic motoneurons by activating intracellular signaling pathways. Mol Cell Neurosci 2013; 56:18-28. [PMID: 23500004 DOI: 10.1016/j.mcn.2013.02.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 01/25/2013] [Accepted: 02/27/2013] [Indexed: 01/19/2023] Open
Abstract
Brain-derived neurotrophic factor (BDNF), a member of the neurotrophin family and a ligand for the tropomyosin-receptor kinase B (TrkB), mediates neuronal survival, differentiation, and synaptic plasticity. However, BDNF is not used to treat neurodegenerative diseases because of its poor pharmacokinetic profile, side effects, and absence of survival properties in clinical trials. Consequently, alternative approaches such as TrkB receptor agonist application are gaining importance. 7,8-Dihydroxyflavone (7,8-DHF), a member of the flavonoid family, has been described as a robust TrkB receptor agonist in hippocampal neurons. Nevertheless, the influence of 7,8-DHF on motoneurons, one of the main targets of BDNF in vivo, is so far unknown. Therefore, we investigated the impact of 7,8-DHF treatment on primary cultured mouse motoneurons. Indeed, we found an activation of the TrkB receptor. Moreover, 7,8-DHF application promotes survival and neurite growth of cultured motoneurons and these effects appear dose-dependent. To investigate the PI3K/AKT and MAPK pathway activation in 7,8-DHF treated motoneurons, we developed a high-density culture system of primary mouse motoneurons. Analysis of both pathways demonstrated a PI3K/AKT but not MAPK pathway activation in cultured motoneurons. This is in contrast to previously published reports about BDNF-mediated activation of TrkB. The lack of MAPK pathway activation is also in contrast to what has been found for hippocampal neurons that indeed show MAPK activation after 7,8-DHF treatment. The ability of 7,8-DHF to imitate BDNF function in motoneurons by using Trk receptor signaling would provide a new approach for the treatment of motoneuron diseases, but needs a more detailed analysis of the activation profile of 7,8-DHF.
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Affiliation(s)
- Teresa Tsai
- Institute for Cellmorphology and molecular Neurobiology, Group for molecular Cell biology, Universitaetsstrasse 150, Ruhr-University Bochum, Germany
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