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Huang S, Tong X, Rehman MU, Wang M, Zhang L, Wang L, Li J, Yang S. Oxygen Supplementation Ameliorates Tibial Development via Stimulating Vascularization in Tibetan Chickens at High Altitudes. Int J Biol Sci 2017; 13:1547-1559. [PMID: 29230103 PMCID: PMC5723921 DOI: 10.7150/ijbs.22670] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 10/15/2017] [Indexed: 12/20/2022] Open
Abstract
Tibetan chickens (TBCs) living in high-altitude hypoxic environment, are characterized by delayed growth and small size as compared to low-altitude broiler chickens. Increasing evidences signify the beneficial effect of oxygen (O2) supplementation in animal's body for regulating their body growth and organ development. However, it is still unclear that whether O2 supplementation has an ameliorative and protective role in TBCs living at high altitude. In this study, we first found that O2 supplementation not only increased the survival rate but also promoted the growth of TBCs associated with bone development. Importantly, we observed that the increase of vascular distribution in the tibial hypertrophic zone could contribute to promote growth and development of the tibia, which is highly correlated with the up-regulated expression level of vascular endothelial growth factor (VEGF)-A and VEGF receptor-1 (VEGFR1). Additionally, hypoxia inducible factor (HIF)-1ɑ also has a stimulative elevation by O2 supplementation. These results were confirmed by histology, immunohistochemistry, qRT-PCR and Western blotting techniques. Altogether, these findings demonstrated that the up-regulation of VEGFA and its receptors are accompanied by proangiogeneic factor (HIF-1α) expression, which were required for angiogenesis to meliorate tibia development of TBCs in hypoxia-induced bone suppression that occurred during O2 supplementation. Thus, O2 supplementation may serve as a good applicant for promoting and meliorating bone development in juvenile high-altitude animals.
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Affiliation(s)
- Shucheng Huang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Xiaole Tong
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Mujeeb Ur Rehman
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Meng Wang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Lihong Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Lei Wang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Jiakui Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.,College of Animals Husbandry and Veterinary Medicine, Tibet Agricultural and Animal Husbandry University, Nyingchi 860000 Tibet, People's Republic of China
| | - Shijin Yang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
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52
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Austin M, Elliott L, Nicolaou N, Grabowska A, Hulse RP. Breast cancer induced nociceptor aberrant growth and collateral sensory axonal branching. Oncotarget 2017; 8:76606-76621. [PMID: 29100335 PMCID: PMC5652729 DOI: 10.18632/oncotarget.20609] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 08/15/2017] [Indexed: 12/11/2022] Open
Abstract
The tumour and neuron interaction has a significant impact upon disease progression and the patients quality of life. In breast cancer patients, it is known that there is an interaction between the tumour microenvironment and the sensory neurons to influence the progression of cancer as well as pain, though these mechanisms still need to be clearly defined. Here it is demonstrated that in a rodent orthotopic model of breast cancer (MDA MB 231) there was an increase in nerve fibre innervation into the tumour microenvironment (protein gene product 9.5), which were calcitonin gene related peptide positive C fibre nociceptors. In contrast, there was a reduction in myelinated nerve fibres (NF200). A sensory neuronal cell line was cultured in response to conditioned media from MDA MB231 and MCF7 as well as vascular endothelial growth factor-A (VEGF-A). All these experimental conditions induced sensory neuronal growth, with increased formation of collateral axonal branches. Furthermore, it was demonstrated that MDA MB231 and VEGF-A induced sensory neuronal sensitisation in response to capsaicin a TRPV1 agonist. MDA MB231 induced neuronal growth was suppressed by VEGFR2 inhibition (ZM323881 and neutralising antibody DC101), in addition both MDA MB231 and VEGF-A induced neurite growth was attenuated by the inhibition of ARP2/3 complex through co-treatment with CK666. This demonstrates that breast cancer can interact with the sensory nervous system to drive neuritogenesis through a VEGF-A/VEGFR2/ARP2/3 mediated pathway.
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Affiliation(s)
- Matt Austin
- Cancer Biology, School of Cancer and Stem Sciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Laura Elliott
- Cancer Biology, School of Cancer and Stem Sciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Niovi Nicolaou
- Cancer Biology, School of Cancer and Stem Sciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Anna Grabowska
- Cancer Biology, School of Cancer and Stem Sciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Richard P Hulse
- Cancer Biology, School of Cancer and Stem Sciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom
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Bates DO, Morris JC, Oltean S, Donaldson LF. Pharmacology of Modulators of Alternative Splicing. Pharmacol Rev 2017; 69:63-79. [PMID: 28034912 PMCID: PMC5226212 DOI: 10.1124/pr.115.011239] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
More than 95% of genes in the human genome are alternatively spliced to form multiple transcripts, often encoding proteins with differing or opposing function. The control of alternative splicing is now being elucidated, and with this comes the opportunity to develop modulators of alternative splicing that can control cellular function. A number of approaches have been taken to develop compounds that can experimentally, and sometimes clinically, affect splicing control, resulting in potential novel therapeutics. Here we develop the concepts that targeting alternative splicing can result in relatively specific pathway inhibitors/activators that result in dampening down of physiologic or pathologic processes, from changes in muscle physiology to altering angiogenesis or pain. The targets and pharmacology of some of the current inhibitors/activators of alternative splicing are demonstrated and future directions discussed.
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Affiliation(s)
- David O Bates
- Cancer Biology, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (D.O.B.); School of Chemistry, UNSW Australia, Sydney, Australia (J.C.M.); School of Physiology, Pharmacology and Neurosciences, School of Clinical Sciences/Bristol Renal, University of Bristol, Bristol, United Kingdom (S.O.); and School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (L.F.D.)
| | - Jonathan C Morris
- Cancer Biology, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (D.O.B.); School of Chemistry, UNSW Australia, Sydney, Australia (J.C.M.); School of Physiology, Pharmacology and Neurosciences, School of Clinical Sciences/Bristol Renal, University of Bristol, Bristol, United Kingdom (S.O.); and School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (L.F.D.)
| | - Sebastian Oltean
- Cancer Biology, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (D.O.B.); School of Chemistry, UNSW Australia, Sydney, Australia (J.C.M.); School of Physiology, Pharmacology and Neurosciences, School of Clinical Sciences/Bristol Renal, University of Bristol, Bristol, United Kingdom (S.O.); and School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (L.F.D.)
| | - Lucy F Donaldson
- Cancer Biology, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (D.O.B.); School of Chemistry, UNSW Australia, Sydney, Australia (J.C.M.); School of Physiology, Pharmacology and Neurosciences, School of Clinical Sciences/Bristol Renal, University of Bristol, Bristol, United Kingdom (S.O.); and School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom (L.F.D.)
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RNA-Sequencing data supports the existence of novel VEGFA splicing events but not of VEGFA xxxb isoforms. Sci Rep 2017; 7:58. [PMID: 28246395 PMCID: PMC5427905 DOI: 10.1038/s41598-017-00100-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 02/06/2017] [Indexed: 01/08/2023] Open
Abstract
Vascular endothelial growth factor (VEGFA), a pivotal regulator of angiogenesis and valuable therapeutic target, is characterised by alternative splicing which generates three principal isoforms, VEGFA121, VEGFA165 and VEGFA189. A second set of anti-angiogenic isoforms termed VEGFAxxxb that utilise an alternative splice site in the final exon have been widely reported, with mRNA detection based principally upon RT-PCR assays. We sought confirmation of the existence of the VEGFAxxxb isoforms within the abundant RNA sequencing data available publicly. Whilst sequences derived specifically from each of the canonical VEGFA isoforms were present in many tissues, there were no sequences derived from VEGFAxxxb isoforms. Sequencing of approximately 50,000 RT-PCR products spanning the exon 7–8 junction in 10 tissues did not identify any VEGFAxxxb transcripts. The absence or extremely low expression of these transcripts in vivo indicates that VEGFAxxxb isoforms are unlikely to play a role in normal physiology. Our analyses also revealed multiple novel splicing events supported by more reads than previously reported for VEGFA145 and VEGFA148 isoforms, including three from novel first exons consistent with existing transcription start site data. These novel VEGFA isoforms may play significant roles in specific cell types.
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Cardoso JV, Abrão MS, Vianna-Jorge R, Ferrari R, Berardo PT, Machado DE, Perini JA. Combined effect of vascular endothelial growth factor and its receptor polymorphisms in endometriosis: a case-control study. Eur J Obstet Gynecol Reprod Biol 2017; 209:25-33. [DOI: 10.1016/j.ejogrb.2016.10.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/16/2016] [Accepted: 10/21/2016] [Indexed: 02/06/2023]
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Uchida H, Matsumura S, Okada S, Suzuki T, Minami T, Ito S. RNA editing enzyme ADAR2 is a mediator of neuropathic pain after peripheral nerve injury. FASEB J 2017; 31:1847-1855. [PMID: 28126736 DOI: 10.1096/fj.201600950r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 01/03/2017] [Indexed: 12/15/2022]
Abstract
Transcriptional and post-translational regulations are important in peripheral nerve injury-induced neuropathic pain, but little is known about the role of post-transcriptional modification. Our objective was to determine the possible effect of adenosine deaminase acting on RNA (ADAR) enzymes, which catalyze post-transcriptional RNA editing, in tactile allodynia, a hallmark of neuropathic pain. Seven days after L5 spinal nerve transection (SNT) in adult mice, we found an increase in ADAR2 expression and a decrease in ADAR3 expression in the injured, but not in the uninjured, dorsal root ganglions (DRGs). These changes were accompanied by elevated levels of editing at the D site of the serotonin (5-hydroxytryptamine) 2C receptor (5-HT2CR), at the I/V site of coatomer protein complex subunit α (COPA), and at the R/G site of AMPA receptor subunit GluA2 in the injured DRG. Compared to Adar2+/+/Gria2R/R littermate controls, Adar2-/-/Gria2R/R mice completely lacked the increased editing of 5-HT2CR, COPA, and GluA2 transcripts in the injured DRG and showed attenuated tactile allodynia after SNT. Furthermore, the antidepressant fluoxetine inhibited neuropathic allodynia after injury and reduced the COPA I/V site editing in the injured DRG. These findings suggest that ADAR2 is a mediator of injury-induced tactile allodynia and thus a potential therapeutic target for the treatment of neuropathic pain.-Uchida, H., Matsumura, S., Okada, S., Suzuki, T., Minami, T., Ito, S. RNA editing enzyme ADAR2 is a mediator of neuropathic pain after peripheral nerve injury.
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Affiliation(s)
- Hitoshi Uchida
- Department of Medical Chemistry, Kansai Medical University, Osaka, Japan
| | - Shinji Matsumura
- Department of Medical Chemistry, Kansai Medical University, Osaka, Japan
| | - Shunpei Okada
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, Tokyo, Japan; and
| | - Tsutomu Suzuki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, Tokyo, Japan; and
| | - Toshiaki Minami
- Department of Anesthesiology, Osaka Medical College, Osaka, Japan
| | - Seiji Ito
- Department of Medical Chemistry, Kansai Medical University, Osaka, Japan;
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57
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Hulse RP, Drake RAR, Bates DO, Donaldson LF. The control of alternative splicing by SRSF1 in myelinated afferents contributes to the development of neuropathic pain. Neurobiol Dis 2016; 96:186-200. [PMID: 27616424 PMCID: PMC5113660 DOI: 10.1016/j.nbd.2016.09.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 08/24/2016] [Accepted: 09/06/2016] [Indexed: 02/07/2023] Open
Abstract
Neuropathic pain results from neuroplasticity in nociceptive neuronal networks. Here we demonstrate that control of alternative pre-mRNA splicing, through the splice factor serine-arginine splice factor 1 (SRSF1), is integral to the processing of nociceptive information in the spinal cord. Neuropathic pain develops following a partial saphenous nerve ligation injury, at which time SRSF1 is activated in damaged myelinated primary afferent neurons, with minimal found in small diameter (IB4 positive) dorsal root ganglia neurons. Serine arginine protein kinase 1 (SRPK1) is the principal route of SRSF1 activation. Spinal SRPK1 inhibition attenuated SRSF1 activity, abolished neuropathic pain behaviors and suppressed central sensitization. SRSF1 was principally expressed in large diameter myelinated (NF200-rich) dorsal root ganglia sensory neurons and their excitatory central terminals (vGLUT1+ve) within the dorsal horn of the lumbar spinal cord. Expression of pro-nociceptive VEGF-Axxxa within the spinal cord was increased after nerve injury, and this was prevented by SRPK1 inhibition. Additionally, expression of anti-nociceptive VEGF-Axxxb isoforms was elevated, and this was associated with reduced neuropathic pain behaviors. Inhibition of VEGF receptor-2 signaling in the spinal cord attenuated behavioral nociceptive responses to mechanical, heat and formalin stimuli, indicating that spinal VEGF receptor-2 activation has potent pro-nociceptive actions. Furthermore, intrathecal VEGF-A165a resulted in mechanical and heat hyperalgesia, whereas the sister inhibitory isoform VEGF-A165b resulted in anti-nociception. These results support a role for myelinated fiber pathways, and alternative pre-mRNA splicing of factors such as VEGF-A in the spinal processing of neuropathic pain. They also indicate that targeting pre-mRNA splicing at the spinal level could lead to a novel target for analgesic development.
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Affiliation(s)
- Richard P Hulse
- Cancer Biology, School of Medicine, University of Nottingham, Nottingham, NG7 7UH, United Kingdom; School of Physiology and Pharmacology, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom.
| | - Robert A R Drake
- School of Physiology and Pharmacology, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom
| | - David O Bates
- Cancer Biology, School of Medicine, University of Nottingham, Nottingham, NG7 7UH, United Kingdom; School of Physiology and Pharmacology, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom
| | - Lucy F Donaldson
- School of Physiology and Pharmacology, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom; School of Life Sciences and Arthritis Research UK Pain Centre, University of Nottingham, Nottingham NG7 7UH, United Kingdom.
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58
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Donaldson LF, Beazley-Long N. Alternative RNA splicing: contribution to pain and potential therapeutic strategy. Drug Discov Today 2016; 21:1787-1798. [PMID: 27329269 PMCID: PMC5405051 DOI: 10.1016/j.drudis.2016.06.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 05/31/2016] [Accepted: 06/14/2016] [Indexed: 12/19/2022]
Abstract
Alternative pre-mRNA splicing generates multiple proteins from a single gene. Control of alternative splicing is a likely therapy in cancer and other disorders. Key molecules in pain pathways – GPCRs and channels – are alternatively spliced. It is proposed that alternative splicing may be a therapeutic target in pain.
Since the sequencing of metazoan genomes began, it has become clear that the number of expressed proteins far exceeds the number of genes. It is now estimated that more than 98% of human genes give rise to multiple proteins through alternative pre-mRNA splicing. In this review, we highlight the known alternative splice variants of many channels, receptors, and growth factors that are important in nociception and pain. Recently, pharmacological control of alternative splicing has been proposed as potential therapy in cancer, wet age-related macular degeneration, retroviral infections, and pain. Thus, we also consider the effects that known splice variants of molecules key to nociception/pain have on nociceptive processing and/or analgesic action, and the potential for control of alternative pre-mRNA splicing as a novel analgesic strategy.
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Affiliation(s)
- Lucy F Donaldson
- School of Life Sciences and Arthritis Research UK Pain Centre, University of Nottingham, Nottingham NG7 2UH, UK.
| | - Nicholas Beazley-Long
- School of Life Sciences and Arthritis Research UK Pain Centre, University of Nottingham, Nottingham NG7 2UH, UK
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59
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Amadio M, Govoni S, Pascale A. Targeting VEGF in eye neovascularization: What's new? Pharmacol Res 2016; 103:253-69. [DOI: 10.1016/j.phrs.2015.11.027] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Revised: 11/19/2015] [Accepted: 11/30/2015] [Indexed: 10/22/2022]
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60
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Vascular endothelial growth factor-A165b prevents diabetic neuropathic pain and sensory neuronal degeneration. Clin Sci (Lond) 2015. [PMID: 26201024 DOI: 10.1042/cs20150124] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Diabetic peripheral neuropathy affects up to half of diabetic patients. This neuronal damage leads to sensory disturbances, including allodynia and hyperalgesia. Many growth factors have been suggested as useful treatments for prevention of neurodegeneration, including the vascular endothelial growth factor (VEGF) family. VEGF-A is generated as two alternative splice variant families. The most widely studied isoform, VEGF-A165a is both pro-angiogenic and neuroprotective, but pro-nociceptive and increases vascular permeability in animal models. Streptozotocin (STZ)-induced diabetic rats develop both hyperglycaemia and many of the resulting diabetic complications seen in patients, including peripheral neuropathy. In the present study, we show that the anti-angiogenic VEGF-A splice variant, VEGF-A165b, is also a potential therapeutic for diabetic neuropathy. Seven weeks of VEGF-A165b treatment in diabetic rats reversed enhanced pain behaviour in multiple behavioural paradigms and was neuroprotective, reducing hyperglycaemia-induced activated caspase 3 (AC3) levels in sensory neuronal subsets, epidermal sensory nerve fibre loss and aberrant sciatic nerve morphology. Furthermore, VEGF-A165b inhibited a STZ-induced increase in Evans Blue extravasation in dorsal root ganglia (DRG), saphenous nerve and plantar skin of the hind paw. Increased transient receptor potential ankyrin 1 (TRPA1) channel activity is associated with the onset of diabetic neuropathy. VEGF-A165b also prevented hyperglycaemia-enhanced TRPA1 activity in an in vitro sensory neuronal cell line indicating a novel direct neuronal mechanism that could underlie the anti-nociceptive effect observed in vivo. These results demonstrate that in a model of Type I diabetes VEGF-A165b attenuates altered pain behaviour and prevents neuronal stress, possibly through an effect on TRPA1 activity.
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61
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Hulse RP. Identification of mechano-sensitive C fibre sensitization and contribution to nerve injury-induced mechanical hyperalgesia. Eur J Pain 2015; 20:615-25. [DOI: 10.1002/ejp.779] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2015] [Indexed: 01/29/2023]
Affiliation(s)
- R. P. Hulse
- Cancer Biology; School of Medicine; University of Nottingham; Queen's Medical Centre; UK
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Vencappa S, Donaldson LF, Hulse RP. Cisplatin induced sensory neuropathy is prevented by vascular endothelial growth factor-A. Am J Transl Res 2015; 7:1032-1044. [PMID: 26279748 PMCID: PMC4532737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 06/13/2015] [Indexed: 06/04/2023]
Abstract
Increased patient survival is a mark of modern anti-cancer therapy success. Unfortunately treatment side-effects such as neurotoxicity are a major long term concern. Sensory neuropathy is one of the common toxicities that can arise during platinum based chemotherapy. In many cases the current poor understanding of the neurological degeneration and lack of suitable analgesia has led to high incidences of patient drop out of treatment. VEGF-A is a prominent neuroprotective agent thus it was hypothesised to prevent cisplatin induced neuropathy. Systemic cisplatin treatment (lasting 3 weeks biweekly) resulted in mechanical allodynia and heat hyperalgesia in mice when compared to vehicle control. PGP9.5 sensory nerve fibre innervation was reduced in the plantar skin in the cisplatin treated group versus vehicle control mice. The cisplatin induced sensory neurodegeneration was associated with increased cleaved caspase 3 expression as well as a reduction in Activating Transcription Factor 3 and pan VEGF-A expression in sensory neurons. VEGF-A165b expression was unaltered between vehicle and cisplatin treatment. rhVEGF-A165a and rhVEGF-A165b both prevented cisplatin induced sensory neurodegeneration. Cisplatin exposure blunts the regenerative properties of sensory neurons thus leading to sensory neuropathy. However, here it is identified that administration of VEGF-A isoform subtypes induce regeneration and prevent cell death and are therefore a possible adjunct therapy for chemotherapy induced neuropathy.
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Affiliation(s)
- Samanta Vencappa
- Cancer Biology, School of Medicine, University of NottinghamNottingham NG7 2UH
| | - Lucy F Donaldson
- School of Life Sciences, University of NottinghamNottingham NG7 2UH
| | - Richard P Hulse
- Cancer Biology, School of Medicine, University of NottinghamNottingham NG7 2UH
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Borbély É, Botz B, Bölcskei K, Kenyér T, Kereskai L, Kiss T, Szolcsányi J, Pintér E, Csepregi JZ, Mócsai A, Helyes Z. Capsaicin-sensitive sensory nerves exert complex regulatory functions in the serum-transfer mouse model of autoimmune arthritis. Brain Behav Immun 2015; 45:50-9. [PMID: 25524130 PMCID: PMC4349500 DOI: 10.1016/j.bbi.2014.12.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 11/18/2014] [Accepted: 12/09/2014] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE The K/BxN serum-transfer arthritis is a widely-used translational mouse model of rheumatoid arthritis, in which the immunological components have thoroughly been investigated. In contrast, little is known about the role of sensory neural factors and the complexity of neuro-immune interactions. Therefore, we analyzed the involvement of capsaicin-sensitive peptidergic sensory nerves in autoantibody-induced arthritis with integrative methodology. METHODS Arthritogenic K/BxN or control serum was injected to non-pretreated mice or resiniferatoxin (RTX)-pretreated animals where capsaicin-sensitive nerves were inactivated. Edema, touch sensitivity, noxious heat threshold, joint function, body weight and clinical arthritis severity scores were determined repeatedly throughout two weeks. Micro-CT and in vivo optical imaging to determine matrix-metalloproteinase (MMP) and neutrophil-derived myeloperoxidase (MPO) activities, semiquantitative histopathological scoring and radioimmunoassay to measure somatostatin in the joint homogenates were also performed. RESULTS In RTX-pretreated mice, the autoantibody-induced joint swelling, arthritis severity score, MMP and MPO activities, as well as histopathological alterations were significantly greater compared to non-pretreated animals. Self-control quantification of the bone mass revealed decreased values in intact female mice, but significantly greater arthritis-induced pathological bone formation after RTX-pretreatment. In contrast, mechanical hyperalgesia from day 10 was smaller after inactivating capsaicin-sensitive afferents. Although thermal hyperalgesia did not develop, noxious heat threshold was significantly higher following RTX pretreatment. Somatostatin-like immunoreactivity elevated in the tibiotarsal joints in non-pretreated, which was significantly less in RTX-pretreated mice. CONCLUSIONS Although capsaicin-sensitive sensory nerves mediate mechanical hyperalgesia in the later phase of autoantibody-induced chronic arthritis, they play important anti-inflammatory roles at least partially through somatostatin release.
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Affiliation(s)
- Éva Borbély
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Pécs, Hungary; János Szentágothai Research Centre, Molecular Pharmacology Research Team, University of Pécs, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Medical School, Pécs, Hungary
| | - Bálint Botz
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Pécs, Hungary; János Szentágothai Research Centre, Molecular Pharmacology Research Team, University of Pécs, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Medical School, Pécs, Hungary
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Pécs, Hungary; János Szentágothai Research Centre, Molecular Pharmacology Research Team, University of Pécs, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Medical School, Pécs, Hungary
| | - Tibor Kenyér
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Pécs, Hungary
| | - László Kereskai
- Department of Pathology, University of Pécs, Medical School, Pécs, Hungary
| | - Tamás Kiss
- János Szentágothai Research Centre, Molecular Pharmacology Research Team, University of Pécs, Pécs, Hungary
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Pécs, Hungary; János Szentágothai Research Centre, Molecular Pharmacology Research Team, University of Pécs, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Medical School, Pécs, Hungary; PharmInVivo Ltd, Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Pécs, Hungary; János Szentágothai Research Centre, Molecular Pharmacology Research Team, University of Pécs, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Medical School, Pécs, Hungary; PharmInVivo Ltd, Pécs, Hungary
| | - Janka Zsófia Csepregi
- Department of Physiology, and MTA-SE "Lendület" Inflammation Physiology Research Group, Semmelweis University, School of Medicine, Budapest, Hungary
| | - Attila Mócsai
- Department of Physiology, and MTA-SE "Lendület" Inflammation Physiology Research Group, Semmelweis University, School of Medicine, Budapest, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Pécs, Hungary; János Szentágothai Research Centre, Molecular Pharmacology Research Team, University of Pécs, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Medical School, Pécs, Hungary; PharmInVivo Ltd, Pécs, Hungary; MTA-PTE NAP B Pain Research Group, Hungary.
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