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van den Buuse M, Halley P, Hoyne GF. Behavioural phenotyping of thunder mice with a hypomorphic mutation of heterogeneous nuclear ribonuclear protein L-like (hnRNPLL) and reduced T cell function. Neurosci Lett 2020; 740:135469. [PMID: 33152455 DOI: 10.1016/j.neulet.2020.135469] [Citation(s) in RCA: 2] [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: 07/04/2020] [Revised: 09/23/2020] [Accepted: 10/27/2020] [Indexed: 02/01/2023]
Abstract
Heterogeneous nuclear ribonuclear protein l-like (hnRNPLL) is an RNA binding protein that regulates alternative splicing of mRNA and is abundantly expressed in memory T lymphocytes of the immune system and in the brain. A hypomorphic allele of the gene encoding hnRNPLL (Hnrpllthunder) selectively reduces T cell accumulation in lymphoid tissues, but little is known about its effects in the brain. Therefore, we exposed Hnrpllthunder mice to a test battery with relevance for a range of psychiatric illnesses. Thunder mice showed enhanced immobility in the tail-suspension test for depression-related behaviours, impaired short-term spatial memory in the Y-maze and reduced avoidance learning in the active avoidance test. Thus, in addition to its reported effects on immune function, the hnRNPLL mutation in thunder mice selectively affected aspects of behaviour.
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Affiliation(s)
- Maarten van den Buuse
- Mental Health Research Institute of Victoria, Parkville, VIC, Australia; School of Psychology and Public Health, La Trobe University, Melbourne, VIC, Australia.
| | - Paul Halley
- Mental Health Research Institute of Victoria, Parkville, VIC, Australia
| | - Gerard F Hoyne
- Immunology Program, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia; School of Health Sciences, University of Notre Dame Australia, Fremantle, WA, Australia
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Volmar CH, Janczura KJ, Lambert G, Salah-Uddin H, Halley P, Sartor GC, Brothers SP, Wahlestedt C. P4‐220: MULTIFACTORIAL EPIGENETIC STRATEGY FOR ALZHEIMER'S DISEASE. Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Claude-Henry Volmar
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
| | - Karolina J. Janczura
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
| | - Guerline Lambert
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
| | - Hasib Salah-Uddin
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
| | - Paul Halley
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
| | - Gregory C. Sartor
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
| | - Shaun P. Brothers
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
| | - Claes Wahlestedt
- University of Miami Miller School of MedicineCenter for Therapeutic InnovationMiamiFLUSA
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Zeier Z, Esanov R, Belle KC, Volmar CH, Johnstone AL, Halley P, DeRosa BA, Khoury N, van Blitterswijk M, Rademakers R, Albert J, Brothers SP, Wuu J, Dykxhoorn DM, Benatar M, Wahlestedt C. Bromodomain inhibitors regulate the C9ORF72 locus in ALS. Exp Neurol 2015; 271:241-50. [PMID: 26099177 DOI: 10.1016/j.expneurol.2015.06.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 06/05/2015] [Accepted: 06/16/2015] [Indexed: 12/13/2022]
Abstract
A hexanucleotide repeat expansion residing within the C9ORF72 gene represents the most common known cause of amyotrophic lateral sclerosis (ALS) and places the disease among a growing family of repeat expansion disorders. The presence of RNA foci, repeat-associated translation products, and sequestration of RNA binding proteins suggests that toxic RNA gain-of-function contributes to pathology while C9ORF72 haploinsufficiency may be an additional pathological factor. One viable therapeutic strategy for treating expansion diseases is the use of small molecule inhibitors of epigenetic modifier proteins to reactivate expanded genetic loci. Indeed, previous studies have established proof of this principle by increasing the drug-induced expression of expanded (and abnormally heterochromatinized) FMR1, FXN and C9ORF72 genes in respective patient cells. While epigenetic modifier proteins are increasingly recognized as druggable targets, there have been few screening strategies to address this avenue of drug discovery in the context of expansion diseases. Here we utilize a semi-high-throughput gene expression based screen to identify siRNAs and small molecule inhibitors of epigenetic modifier proteins that regulate C9ORF72 RNA in patient fibroblasts, lymphocytes and reprogrammed motor neurons. We found that several bromodomain small molecule inhibitors increase the expression of C9ORF72 mRNA and pre-mRNA without affecting repressive epigenetic signatures of expanded C9ORF72 alleles. These data suggest that bromodomain inhibition increases the expression of unexpanded C9ORF72 alleles and may therefore compensate for haploinsufficiency without increasing the production of toxic RNA and protein products, thereby conferring therapeutic value.
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Affiliation(s)
- Zane Zeier
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Rustam Esanov
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Kinsley C Belle
- John P. Hussman Institute for Human Genomics and The Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, USA
| | - Claude-Henry Volmar
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Andrea L Johnstone
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Paul Halley
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Brooke A DeRosa
- John P. Hussman Institute for Human Genomics and The Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, USA
| | - Nathalie Khoury
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | | | | | | | - Shaun P Brothers
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Joanne Wuu
- Department of Neurology, University of Miami Miller School of Medicine, USA
| | - Derek M Dykxhoorn
- John P. Hussman Institute for Human Genomics and The Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, USA
| | - Michael Benatar
- Department of Neurology, University of Miami Miller School of Medicine, USA
| | - Claes Wahlestedt
- Center for Therapeutic Innovation and Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
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Sheridan GK, Wdowicz A, Pickering M, Watters O, Halley P, O'Sullivan NC, Mooney C, O'Connell DJ, O'Connor JJ, Murphy KJ. CX3CL1 is up-regulated in the rat hippocampus during memory-associated synaptic plasticity. Front Cell Neurosci 2014; 8:233. [PMID: 25161610 PMCID: PMC4130185 DOI: 10.3389/fncel.2014.00233] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 07/25/2014] [Indexed: 11/13/2022] Open
Abstract
Several cytokines and chemokines are now known to play normal physiological roles in the brain where they act as key regulators of communication between neurons, glia, and microglia. In particular, cytokines and chemokines can affect cardinal cellular and molecular processes of hippocampal-dependent long-term memory consolidation including synaptic plasticity, synaptic scaling and neurogenesis. The chemokine, CX3CL1 (fractalkine), has been shown to modulate synaptic transmission and long-term potentiation (LTP) in the CA1 pyramidal cell layer of the hippocampus. Here, we confirm widespread expression of CX3CL1 on mature neurons in the adult rat hippocampus. We report an up-regulation in CX3CL1 protein expression in the CA1, CA3 and dentate gyrus (DG) of the rat hippocampus 2 h after spatial learning in the water maze task. Moreover, the same temporal increase in CX3CL1 was evident following LTP-inducing theta-burst stimulation in the DG. At physiologically relevant concentrations, CX3CL1 inhibited LTP maintenance in the DG. This attenuation in dentate LTP was lost in the presence of GABAA receptor/chloride channel antagonism. CX3CL1 also had opposing actions on glutamate-mediated rise in intracellular calcium in hippocampal organotypic slice cultures in the presence and absence of GABAA receptor/chloride channel blockade. Using primary dissociated hippocampal cultures, we established that CX3CL1 reduces glutamate-mediated intracellular calcium rises in both neurons and glia in a dose dependent manner. In conclusion, CX3CL1 is up-regulated in the hippocampus during a brief temporal window following spatial learning the purpose of which may be to regulate glutamate-mediated neurotransmission tone. Our data supports a possible role for this chemokine in the protective plasticity process of synaptic scaling.
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Affiliation(s)
- Graham K Sheridan
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland ; Department of Physiology, Development and Neuroscience, University of Cambridge Cambridge, UK
| | - Anita Wdowicz
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Mark Pickering
- School of Medicine and Medical Science, Health Sciences Centre, University College Dublin Dublin, Ireland
| | - Orla Watters
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Paul Halley
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Niamh C O'Sullivan
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Claire Mooney
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - David J O'Connell
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - John J O'Connor
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Keith J Murphy
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
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Halley P, Kadakkuzha BM, Faghihi MA, Magistri M, Zeier Z, Khorkova O, Coito C, Hsiao J, Lawrence M, Wahlestedt C. Regulation of the apolipoprotein gene cluster by a long noncoding RNA. Cell Rep 2014; 6:222-30. [PMID: 24388749 DOI: 10.1016/j.celrep.2013.12.015] [Citation(s) in RCA: 167] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 04/03/2013] [Accepted: 12/10/2013] [Indexed: 01/22/2023] Open
Abstract
Apolipoprotein A1 (APOA1) is the major protein component of high-density lipoprotein (HDL) in plasma. We have identified an endogenously expressed long noncoding natural antisense transcript, APOA1-AS, which acts as a negative transcriptional regulator of APOA1 both in vitro and in vivo. Inhibition of APOA1-AS in cultured cells resulted in the increased expression of APOA1 and two neighboring genes in the APO cluster. Chromatin immunoprecipitation (ChIP) analyses of a ∼50 kb chromatin region flanking the APOA1 gene demonstrated that APOA1-AS can modulate distinct histone methylation patterns that mark active and/or inactive gene expression through the recruitment of histone-modifying enzymes. Targeting APOA1-AS with short antisense oligonucleotides also enhanced APOA1 expression in both human and monkey liver cells and induced an increase in hepatic RNA and protein expression in African green monkeys. Furthermore, the results presented here highlight the significant local modulatory effects of long noncoding antisense RNAs and demonstrate the therapeutic potential of manipulating the expression of these transcripts both in vitro and in vivo.
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Affiliation(s)
- Paul Halley
- Center for Therapeutic Innovation, University of Miami, Miller School of Medicine, NW 10(th) Avenue, Miami, FL 33136, USA; Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, NW 10(th) Avenue, Miami, FL 33136, USA
| | - Beena M Kadakkuzha
- Center for Therapeutic Innovation, University of Miami, Miller School of Medicine, NW 10(th) Avenue, Miami, FL 33136, USA; Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, NW 10(th) Avenue, Miami, FL 33136, USA
| | - Mohammad Ali Faghihi
- Center for Therapeutic Innovation, University of Miami, Miller School of Medicine, NW 10(th) Avenue, Miami, FL 33136, USA; Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, NW 10(th) Avenue, Miami, FL 33136, USA
| | - Marco Magistri
- Center for Therapeutic Innovation, University of Miami, Miller School of Medicine, NW 10(th) Avenue, Miami, FL 33136, USA; Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, NW 10(th) Avenue, Miami, FL 33136, USA
| | - Zane Zeier
- Center for Therapeutic Innovation, University of Miami, Miller School of Medicine, NW 10(th) Avenue, Miami, FL 33136, USA; Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, NW 10(th) Avenue, Miami, FL 33136, USA
| | - Olga Khorkova
- OPKO-CURNA, 10320 USA Today Way, Miramar, FL 33025, USA
| | - Carlos Coito
- OPKO-CURNA, 10320 USA Today Way, Miramar, FL 33025, USA
| | - Jane Hsiao
- OPKO-CURNA, 10320 USA Today Way, Miramar, FL 33025, USA
| | | | - Claes Wahlestedt
- Center for Therapeutic Innovation, University of Miami, Miller School of Medicine, NW 10(th) Avenue, Miami, FL 33136, USA; Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, NW 10(th) Avenue, Miami, FL 33136, USA.
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Affiliation(s)
- Paul Halley
- Department of Psychiatry and Behavioral Sciences, and Center for Therapeutic Innovation, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Olga Khorkova
- OPKO-CURNA 10320 USA Today Way, Miramar, FL 33025, USA
| | - Claes Wahlestedt
- Department of Psychiatry and Behavioral Sciences, and Center for Therapeutic Innovation, University of Miami Miller School of Medicine, Miami, FL 33136, USA
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Yu L, Christov V, Christie G, Gray J, Dutt U, Harvey T, Halley P, Coombs S, Jayasekara R, Lonergan G. Effect of additives on gelatinization, rheological properties and biodegradability of thermoplastic starch. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19991440134] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Dunne N, Ormsby R, McNally T, Mitchell C, Martin D, Halley P, Nicholson T, Schiller T, Gahan L, Musumeci A, Smith S. M-3 Nanocomposite Bone Cements for Orthopaedic Applications. J Biomech 2010. [DOI: 10.1016/s0021-9290(10)70112-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Sopade P, Halley P, Bhandari B, D’Arcy B, Doebler C, Caffin N. Application of the Williams–Landel–Ferry model to the viscosity–temperature relationship of Australian honeys. J FOOD ENG 2003. [DOI: 10.1016/s0260-8774(02)00149-8] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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del Río E, Bevilacqua JA, Marsh SJ, Halley P, Caulfield MP. Muscarinic M1 receptors activate phosphoinositide turnover and Ca2+ mobilisation in rat sympathetic neurones, but this signalling pathway does not mediate M-current inhibition. J Physiol 1999; 520 Pt 1:101-11. [PMID: 10517804 PMCID: PMC2269570 DOI: 10.1111/j.1469-7793.1999.00101.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
1. The relationship between muscarinic receptor activation, phosphoinositide turnover, calcium mobilisation and M-current inhibition has been studied in rat superior cervical ganglion (SCG) neurones in primary culture. 2. Phosphoinositide-specific phospholipase C (PLC) stimulation was measured by the accumulation of [3H]-cytidine monophosphate phosphatidate (CMP-PA) after incubation with [3H]-cytidine in the presence of Li+. The muscarinic agonist oxotremorine methiodide (oxo-M) stimulated PLC in a dose-dependent manner with an EC50 of approximately 3.5 microM. 3. The concentration-response curve for oxo-M was shifted to the right by a factor of about 10 by pirenzepine (100 nM), suggesting a pKB (-log of the apparent dissociation constant) of 7.9 +/- 0.4, while himbacine (1 microM) shifted the curve by a factor of about 13 (pKB approximately 7.1 +/- 0.6). This indicates involvement of the M1 muscarinic receptor in this response. 4. The accumulation of CMP-PA was localised by in situ autoradiography to SCG principal neurones, with no detectable signal in glial cells present in the primary cultures. 5. The ability of oxo-M to release Ca2+ from inositol(1,4, 5)trisphosphate (InsP3)-sensitive stores was determined by fura-2 microfluorimetry of SCG neurones voltage clamped in perforated patch mode. Oxo-M failed to evoke intracellular Ca2+ (Ca2+i) mobilisation in SCG neurones voltage clamped at -60 mV, but produced a significant Ca2+i rise (67 +/- 15 nM, n = 9) in cells voltage clamped at -25 mV. 6. Thapsigargin (0.5-1 microM) caused a 70 % inhibition of the oxo-M-induced Ca2+i increase, indicating its intracellular origin, while oxo-M-induced inhibition of M-current in the same cells was unaffected by thapsigargin. 7. Our results do not support the involvement of InsP3-sensitive calcium mobilisation in M-current inhibition.
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Affiliation(s)
- E del Río
- Department of Pharmacology and Neuroscience, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK.
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Fernandez-Fernandez JM, Wanaverbecq N, Halley P, Caulfield MP, Brown DA. Selective activation of heterologously expressed G protein-gated K+ channels by M2 muscarinic receptors in rat sympathetic neurones. J Physiol 1999; 515 ( Pt 3):631-7. [PMID: 10066893 PMCID: PMC2269187 DOI: 10.1111/j.1469-7793.1999.631ab.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
1. G protein-regulated inward rectifier K+ (GIRK) channels were over-expressed in dissociated rat superior cervical sympathetic (SCG) neurones by co-transfecting green fluorescent protein (GFP)-, GIRK1- and GIRK2-expressing plasmids using the biolistic technique. Membrane currents were subsequently recorded with whole-cell patch electrodes. 2. Co-transfected cells had larger Ba2+-sensitive inwardly rectifying currents and 13 mV more negative resting potentials (in 3 mM [K+]o) than non-transfected cells, or cells transfected with GIRK1 or GIRK2 alone. 3. Carbachol (CCh, 1-30 microM) increased the inwardly rectifying current in 70 % of GIRK1+ GIRK2-transfected cells by 261 +/- 53 % (n = 6, CCh 30 microM) at -120 mV, but had no effect in non-transfected cells or in cells transfected with GIRK1 or GIRK2 alone. Pertussis toxin prevented the effect of carbachol but had no effect on basal currents. 4. The effect of CCh was antagonized by 6 nM tripitramine but not by 100 nM pirenzepine, consistent with activation of endogenous M2 muscarinic acetylcholine receptors. 5. In contrast, inhibition of the voltage-activated Ca2+ current by CCh was antagonized by 100 nM pirenzepine but not by 6 nM tripitramine, indicating that it was mediated by M4 muscarinic acetylcholine receptors. 6. We conclude that endogenous M2 and M4 muscarinic receptors selectively couple to GIRK currents and Ca2+ currents respectively, with negligible cross-talk.
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Affiliation(s)
- J M Fernandez-Fernandez
- Department of Pharmacology and Neuroscience, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK.
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