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Vašek D, Fikarová N, Marková VN, Honc O, Pacáková L, Porubská B, Somova V, Novotný J, Melkes B, Krulová M. Lipopolysaccharide pretreatment increases the sensitivity of the TRPV1 channel and promotes an anti-inflammatory phenotype of capsaicin-activated macrophages. J Inflamm (Lond) 2024; 21:17. [PMID: 38790047 PMCID: PMC11127439 DOI: 10.1186/s12950-024-00391-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
BACKGROUND The transient receptor potential vanilloid 1 (TRPV1) is well-established in neuronal function, yet its role in immune reactions remains enigmatic. The conflicting data on its inflammatory role, suggesting both pro-inflammatory and anti-inflammatory effects upon TRPV1 stimulation in immune cells, adds complexity. To unravel TRPV1 immunomodulatory mechanisms, we investigated how the TRPV1 agonist capsaicin influences lipopolysaccharide (LPS)-induced pro-inflammatory macrophage phenotypes. RESULTS Changes in the surface molecules, cytokine production, and signaling cascades linked to the phenotype of M1 or M2 macrophages of the J774 macrophage cell line and bone marrow-derived macrophages, treated with capsaicin before or after the LPS-induced inflammatory reaction were determined. The functional capacity of macrophages was also assessed by infecting the stimulated macrophages with the intracellular parasite Leishmania mexicana. CONCLUSION Our findings reveal that TRPV1 activation yields distinct macrophage responses influenced by the inflammatory context. LPS pre-treatment followed by capsaicin activation prompted increased calcium influx, accompanied by a shift toward an anti-inflammatory M2b-like polarization state.
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Affiliation(s)
- Daniel Vašek
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Natálie Fikarová
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Vendula Nagy Marková
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Ondřej Honc
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Lenka Pacáková
- Department of Parasitology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Bianka Porubská
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Veronika Somova
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Jiří Novotný
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Barbora Melkes
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Magdaléna Krulová
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic.
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2
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Kubo T, Sasaki K, Sato S, Minowa T, Hida T, Murata K, Kanaseki T, Tsukahara T, Hirohashi Y, Uhara H, Torigoe T. Distinct induction pathways of heat shock protein 27 in human keratinocytes: Heat stimulation or capsaicin through phosphorylation of heat shock factor 1 at serine 326 and/or suppression of ΔNp63. Biochem Biophys Res Commun 2024; 708:149817. [PMID: 38537528 DOI: 10.1016/j.bbrc.2024.149817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/07/2024] [Accepted: 03/21/2024] [Indexed: 04/06/2024]
Abstract
Epidermal keratinocytes, forming the outermost layer of the human body, serve as a crucial barrier against diverse external stressors such as ultraviolet radiation. Proper keratinocyte differentiation and effective responses to external stimuli are pivotal for maintaining barrier integrity. Heat is one such stimulus that triggers the synthesis of heat shock proteins (HSPs) when cells are exposed to temperatures above 42 °C. Additionally, activation of the transient receptor potential cation channel subfamily V member 1 (TRPV1) occurs at 42 °C. Here, we explore the interplay between TRPV1 signaling and HSP induction in human keratinocytes. Both heat and capsaicin, a TRPV1 agonist, induce expression of HSP27, HSP70, and HSP90 in keratinocytes. Interestingly, pharmacological inhibition of TRPV1 attenuates heat-induced HSP27 expression, but not that of HSP70 or HSP90. Furthermore, both heat and capsaicin stimulation result in distinct phosphorylation patterns of heat shock factor 1 (HSF1), with phosphorylation at serine 326 being a common feature. Notably, genetic manipulation to mimic dephosphorylation of HSF1 at serine 326 reduces HSP27 levels. Additionally, ΔNp63, a key regulator of epidermal differentiation, negatively modulates HSP27 expression independently of HSF1 phosphorylation status. While heat stimulation has no effect on ΔNp63 expression, capsaicin reduces its levels. The precise role of TRPV1 signaling in keratinocytes warrants further investigation for a comprehensive understanding of its impact on barrier function.
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Affiliation(s)
- Terufumi Kubo
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan.
| | - Kenta Sasaki
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Sayuri Sato
- Department of Dermatology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Tomoyuki Minowa
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan; Department of Dermatology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Tokimasa Hida
- Department of Dermatology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Kenji Murata
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Takayuki Kanaseki
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Tomohide Tsukahara
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Yoshihiko Hirohashi
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Hisashi Uhara
- Department of Dermatology, Sapporo Medical University, School of Medicine, Sapporo, Japan
| | - Toshihiko Torigoe
- Department of Pathology, Sapporo Medical University, School of Medicine, Sapporo, Japan
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Ragozzino FJ, Karatsoreos IN, Peters JH. Principles of synaptic encoding of brainstem circadian rhythms. Exp Physiol 2024. [PMID: 38308846 DOI: 10.1113/ep090867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 01/16/2024] [Indexed: 02/05/2024]
Abstract
Circadian regulation of autonomic tone and reflex pathways pairs physiological processes with the daily light cycle. However, the underlying mechanisms mediating these changes on autonomic neurocircuitry are only beginning to be understood. The brainstem nucleus of the solitary tract (NTS) and adjacent nuclei, including the area postrema and dorsal motor nucleus of the vagus, are key candidates for rhythmic control of some aspects of the autonomic nervous system. Recent findings have contributed to a working model of circadian regulation in the brainstem which manifests from the transcriptional, to synaptic, to circuit levels of organization. Vagal afferent neurons and the NTS possess rhythmic clock gene expression, rhythmic action potential firing, and our recent findings demonstrate rhythmic spontaneous glutamate release. In addition, postsynaptic conductances also vary across the day producing subtle changes in membrane depolarization which govern synaptic efficacy. Together these coordinated pre- and postsynaptic changes provide nuanced control of synaptic transmission across the day to tune the sensitivity of primary afferent input and likely govern reflex output. Further, given the important role for the brainstem in integrating cues such as feeding, cardiovascular function and temperature, it may also be an underappreciated locus in mediating the effects of such non-photic entraining cues. This short review focuses on the neurophysiological principles that govern NTS synaptic transmission and how circadian rhythms impacted them across the day.
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Affiliation(s)
- Forrest J Ragozzino
- Department of Integrative Physiology and Neuroscience, College of Veterinary Medicine, Washington State University, Pullman, Washington, USA
| | - Ilia N Karatsoreos
- Department of Psychological and Brain Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - James H Peters
- Department of Integrative Physiology and Neuroscience, College of Veterinary Medicine, Washington State University, Pullman, Washington, USA
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Kim H, Kim J, Kim J, Oh S, Choi K, Yoon J. Magnetothermal-based non-invasive focused magnetic stimulation for functional recovery in chronic stroke treatment. Sci Rep 2023; 13:4988. [PMID: 36973390 PMCID: PMC10042827 DOI: 10.1038/s41598-023-31979-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
Magnetic heat-based brain stimulation of specific lesions could promote the restoration of impaired motor function caused by chronic stroke. We delivered localized stimulation by nanoparticle-mediated heat generation within the targeted brain area via focused magnetic stimulation. The middle cerebral artery occlusion model was prepared, and functional recovery in the chronic-phase stroke rat model was demonstrated by the therapeutic application of focused magnetic stimulation. We observed a transient increase in blood-brain barrier permeability at the target site of < 4 mm and metabolic brain activation at the target lesion. After focused magnetic stimulation, the rotarod score increased by 390 ± 28% (p < 0.05) compared to the control group. Standardized uptake value in the focused magnetic stimulation group increased by 2063 ± 748% (p < 0.01) compared to the control group. Moreover, an increase by 24 ± 5% (p < 0.05) was observed in the sham group as well. Our results show that non-invasive focused magnetic stimulation can safely modulate BBB permeability and enhance neural activation for chronic-phase stroke treatment in the targeted deep brain area.
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Affiliation(s)
- Hohyeon Kim
- School of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea
| | - Jihye Kim
- Department of Neurology, Chonnam National University Hospital and Medical School, 8 Hak-dong, Dong-gu, Gwangju, 501-757, South Korea
| | - Jahae Kim
- Department of Nuclear Medicines, Chonnam National University Hospital and Medical School, 8 Hak-dong, Dong-gu, Gwangju, 501-757, South Korea
| | - Seungjun Oh
- School of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea
| | - Kangho Choi
- Department of Neurology, Chonnam National University Hospital and Medical School, 8 Hak-dong, Dong-gu, Gwangju, 501-757, South Korea.
| | - Jungwon Yoon
- School of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea.
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Merritt JC, Richbart SD, Moles EG, Cox AJ, Brown KC, Miles SL, Finch PT, Hess JA, Tirona MT, Valentovic MA, Dasgupta P. Anti-cancer activity of sustained release capsaicin formulations. Pharmacol Ther 2022; 238:108177. [PMID: 35351463 PMCID: PMC9510151 DOI: 10.1016/j.pharmthera.2022.108177] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 11/17/2022]
Abstract
Capsaicin (trans-8-methyl-N-vanillyl-6-noneamide) is a hydrophobic, lipophilic vanilloid phytochemical abundantly found in chili peppers and pepper extracts. Several convergent studies show that capsaicin displays robust cancer activity, suppressing the growth, angiogenesis and metastasis of several human cancers. Despite its potent cancer-suppressing activity, the clinical applications of capsaicin as a viable anti-cancer drug have remained problematic due to its poor bioavailability and aqueous solubility properties. In addition, the administration of capsaicin is associated with adverse side effects like gastrointestinal cramps, stomach pain, nausea and diarrhea and vomiting. All these hurdles may be circumvented by encapsulation of capsaicin in sustained release drug delivery systems. Most of the capsaicin-based the sustained release drugs have been tested for their pain-relieving activity. Only a few of these formulations have been investigated as anti-cancer agents. The present review describes the physicochemical properties, bioavailability, and anti-cancer activity of capsaicin-sustained release agents. The asset of such continuous release capsaicin formulations is that they display better solubility, stability, bioavailability, and growth-suppressive activity than the free drug. The encapsulation of capsaicin in sustained release carriers minimizes the adverse side effects of capsaicin. In summary, these capsaicin-based sustained release drug delivery systems have the potential to function as novel chemotherapies, unique diagnostic imaging probes and innovative chemosensitization agents in human cancers.
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Affiliation(s)
- Justin C Merritt
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States
| | - Stephen D Richbart
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States
| | - Emily G Moles
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States
| | - Ashley J Cox
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States
| | - Kathleen C Brown
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States
| | - Sarah L Miles
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States
| | - Paul T Finch
- Department of Oncology, Edwards Cancer Center, Joan C. Edwards School of Medicine, Marshall University, 1400 Hal Greer Boulevard, Huntington, WV 25755, United States
| | - Joshua A Hess
- Department of Oncology, Edwards Cancer Center, Joan C. Edwards School of Medicine, Marshall University, 1400 Hal Greer Boulevard, Huntington, WV 25755, United States
| | - Maria T Tirona
- Department of Hematology-Oncology, Edwards Cancer Center, Joan C. Edwards School of Medicine, Marshall University, 1400 Hal Greer Boulevard, Huntington, WV 25755, United States
| | - Monica A Valentovic
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States
| | - Piyali Dasgupta
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, United States.
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Pyo HJ, An X, Cho H. The role of free fatty acid receptor pathways in a selective regulation of TRPA1 and TRPV1 by resolvins in primary sensory neurons. J Cell Physiol 2022; 237:3651-3660. [PMID: 35802479 PMCID: PMC9544928 DOI: 10.1002/jcp.30826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 06/13/2022] [Accepted: 06/27/2022] [Indexed: 11/25/2022]
Abstract
Transient receptor potential ankyrin 1 and vanilloid 1 (TRPA1 and TRPV1, respectively) channels contribute to inflammatory and neuropathic pain, indicating that their pharmacological inhibition could be a novel strategy for treating painful diseases. However, the mechanisms of TRPA1/V1 channel modulation have been mostly characterized to be upregulation and sensitization via variety of exogenous stimuli, endogenous inflammatory mediators, and metabolites of oxidative stress. Here we used calcium imaging of dorsal root ganglion neurons to identify an inhibitor signaling pathway for TRPA1 and TRPV1 regulated by resolvins (RvD1 and RvE1), which are endogenous anti‐inflammatory lipid mediators. TRPA1 and TRPV1 channel activations were evoked by the TRPA1 agonist allyl isothiocyanate and the TRPV1 agonist capsaicin. Our results show that RvD1‐induced selective inhibition of TRPA1 activity was mediated by free fatty acid receptor 4 (FFAR4)‐protein kinase C (PKC) signaling. Experiments assessing RvE1‐induced TRPV1 inhibition showed that RvE1 actions required both FFAR1 and FFAR4. Combined stimulation of FFAR1/FFAR4 or FFAR1/PKC mimicked TRPV1 inhibition by RvE1, and these effects were blocked by a protein kinase D (PKD) inhibitor, implying that PKD is an effector of the FFAR/PKC signaling axis in RvE1‐induced TRPV1 inhibition. Despite selective inhibition of TRPV1 in the nanomolar range of RvE1, higher concentrations of RvE1 also inhibited TRPA1, possibly through PKC. Collectively, our findings reveal FFAR1 and FFAR4 as key signaling pathways mediating the selective targeting of resolvins to regulate TRPA1 and TRPV1, elucidating endogenous analgesic mechanisms that could be exploited as potential therapeutic targets.
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Affiliation(s)
- Hyun-Jeong Pyo
- Department of Physiology, Sungkyunkwan University School of Medicine, Suwon, Korea
| | - Xue An
- Department of Physiology, Sungkyunkwan University School of Medicine, Suwon, Korea
| | - Hana Cho
- Department of Physiology, Sungkyunkwan University School of Medicine, Suwon, Korea
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Hamers A, Primus CP, Whitear C, Kumar NA, Masucci M, Montalvo Moreira SA, Rathod K, Chen J, Bubb K, Colas R, Khambata RS, Dalli J, Ahluwalia A. 20-HETE is a pivotal endogenous ligand for TRPV1-mediated neurogenic inflammation in the skin. Br J Pharmacol 2021; 179:1450-1469. [PMID: 34755897 DOI: 10.1111/bph.15726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 10/11/2021] [Accepted: 10/26/2021] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE Transient receptor potential cation channel subfamily V member 1 (TRPV1) is localised to sensory C-fibres and its opening leads to membrane depolarization, resulting in neuropeptide release and neurogenic inflammation. However, the identity of the endogenous activator of TRPV1 in this setting is unknown. The arachidonic acid (AA) metabolites 12-hydroperoxyeicosatetraenoyl acid (12-HpETE) and 20-hydroxyeicosatetraenoic acid (20-HETE) have emerged as potential endogenous activators of TRPV1 however, whether these lipids underlie TRPV1-mediated neurogenic inflammation remains unknown. EXPERIMENTAL APPROACH we analysed human cantharidin-induced blister samples and inflammatory responses in TRPV1 transgenic mice. KEY RESULTS In a human cantharidin-blister model the potent TRPV1 activators 20-HETE but not 12-HETE (stable metabolite of 12-HpETE) correlated with AA levels. Similarly, in mice levels of 20-HETE (but not 12-HETE) and AA were strongly positively correlated within the inflammatory milieu. Furthermore, LPS-induced oedema formation and neutrophil recruitment were substantially and significantly attenuated by pharmacological block or genetic deletion of TRPV1 channels, inhibition of 20-HETE formation or SP receptor neurokinin 1 (NK1 ) blockade. LPS treatment also increased cytochrome-P450 ώ-hydroxylase gene expression, the enzyme responsible for 20-HETE production. CONCLUSIONS AND IMPLICATIONS Taken together, our findings suggest that endogenously generated 20-HETE activates TRPV1 causing C-fibre activation and consequent oedema formation. These findings identify a novel pathway that may be useful in the therapeutics of diseases/conditions characterized by a prominent neurogenic inflammation, as in several skin diseases.
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Affiliation(s)
- Alexander Hamers
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Christopher P Primus
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Charlotte Whitear
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Nitin Ajit Kumar
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Michael Masucci
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Shanik A Montalvo Moreira
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Krishnaraj Rathod
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Jianmin Chen
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Kristen Bubb
- Monash Cardiovascular Research Centre, Monash University, Melbourne, Australia
| | - Romain Colas
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Rayomand S Khambata
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Jesmond Dalli
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
| | - Amrita Ahluwalia
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London
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Henley JM, Seager R, Nakamura Y, Talandyte K, Nair J, Wilkinson KA. SUMOylation of synaptic and synapse-associated proteins: An update. J Neurochem 2021; 156:145-161. [PMID: 32538470 PMCID: PMC8218484 DOI: 10.1111/jnc.15103] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 12/13/2022]
Abstract
SUMOylation is a post-translational modification that regulates protein signalling and complex formation by adjusting the conformation or protein-protein interactions of the substrate protein. There is a compelling and rapidly expanding body of evidence that, in addition to SUMOylation of nuclear proteins, SUMOylation of extranuclear proteins contributes to the control of neuronal development, neuronal stress responses and synaptic transmission and plasticity. In this brief review we provide an update of recent developments in the identification of synaptic and synapse-associated SUMO target proteins and discuss the cell biological and functional implications of these discoveries.
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Affiliation(s)
- Jeremy M. Henley
- School of BiochemistryCentre for Synaptic PlasticityUniversity of BristolUniversity WalkBristolUK
| | - Richard Seager
- School of BiochemistryCentre for Synaptic PlasticityUniversity of BristolUniversity WalkBristolUK
| | - Yasuko Nakamura
- School of BiochemistryCentre for Synaptic PlasticityUniversity of BristolUniversity WalkBristolUK
| | - Karolina Talandyte
- School of BiochemistryCentre for Synaptic PlasticityUniversity of BristolUniversity WalkBristolUK
| | - Jithin Nair
- School of BiochemistryCentre for Synaptic PlasticityUniversity of BristolUniversity WalkBristolUK
| | - Kevin A. Wilkinson
- School of BiochemistryCentre for Synaptic PlasticityUniversity of BristolUniversity WalkBristolUK
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