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Kemp SWP, Szynkaruk M, Stanoulis KN, Wood MD, Liu EH, Willand MP, Morlock L, Naidoo J, Williams NS, Ready JM, Mangano TJ, Beggs S, Salter MW, Gordon T, Pieper AA, Borschel GH. Pharmacologic rescue of motor and sensory function by the neuroprotective compound P7C3 following neonatal nerve injury. Neuroscience 2014; 284:202-216. [PMID: 25313000 DOI: 10.1016/j.neuroscience.2014.10.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [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: 08/01/2014] [Revised: 10/03/2014] [Accepted: 10/03/2014] [Indexed: 12/12/2022]
Abstract
Nerve injuries cause pain, paralysis and numbness that can lead to major disability, and newborns often sustain nerve injuries during delivery that result in lifelong impairment. Without a pharmacologic agent to enhance functional recovery from these injuries, clinicians rely solely on surgery and rehabilitation to treat patients. Unfortunately, patient outcomes remain poor despite application of the most advanced microsurgical and rehabilitative techniques. We hypothesized that the detrimental effects of traumatic neonatal nerve injury could be mitigated with pharmacologic neuroprotection, and tested whether the novel neuroprotective agent P7C3 would block peripheral neuron cell death and enhance functional recovery in a rat neonatal nerve injury model. Administration of P7C3 after sciatic nerve crush injury doubled motor and sensory neuron survival, and also promoted axon regeneration in a dose-dependent manner. Treatment with P7C3 also enhanced behavioral and muscle functional recovery, and reversed pathological mobilization of spinal microglia after injury. Our findings suggest that the P7C3 family of neuroprotective compounds may provide a basis for the development of a new neuroprotective drug to enhance recovery following peripheral nerve injury.
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Affiliation(s)
- S W P Kemp
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada; The Hospital for Sick Children Research Institute, Program in Neuroscience and Mental Health, Toronto, ON, Canada.
| | - M Szynkaruk
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada
| | - K N Stanoulis
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada
| | - M D Wood
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada; The Hospital for Sick Children Research Institute, Program in Neuroscience and Mental Health, Toronto, ON, Canada
| | - E H Liu
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada
| | - M P Willand
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada; The Hospital for Sick Children Research Institute, Program in Neuroscience and Mental Health, Toronto, ON, Canada
| | - L Morlock
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - J Naidoo
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - N S Williams
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - J M Ready
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - T J Mangano
- Psychoactive Drug Screening Program, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - S Beggs
- The Hospital for Sick Children Research Institute, Program in Neuroscience and Mental Health, Toronto, ON, Canada
| | - M W Salter
- The Hospital for Sick Children Research Institute, Program in Neuroscience and Mental Health, Toronto, ON, Canada
| | - T Gordon
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada; The Hospital for Sick Children Research Institute, Program in Neuroscience and Mental Health, Toronto, ON, Canada
| | - A A Pieper
- Departments of Psychiatry, Neurology and Veterans Affairs, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA.
| | - G H Borschel
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada; The Hospital for Sick Children Research Institute, Program in Neuroscience and Mental Health, Toronto, ON, Canada; University of Toronto, Department of Surgery and Institute of Biomaterials and Biomedical Engineering, Toronto, ON, Canada.
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Lee AS, Gonzales KL, Lee A, Moosmang S, Hofmann F, Pieper AA, Rajadhyaksha AM. Selective genetic deletion of cacna1c in the mouse prefrontal cortex. Mol Psychiatry 2012; 17:1051. [PMID: 23096954 PMCID: PMC5837808 DOI: 10.1038/mp.2012.149] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lee AS, Ra S, Rajadhyaksha AM, Britt JK, De Jesus-Cortes H, Gonzales KL, Lee A, Moosmang S, Hofmann F, Pieper AA, Rajadhyaksha AM. Forebrain elimination of cacna1c mediates anxiety-like behavior in mice. Mol Psychiatry 2012; 17:1054-5. [PMID: 22665262 PMCID: PMC3481072 DOI: 10.1038/mp.2012.71] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- A S Lee
- Department of Pediatrics, Division of Pediatric Neurology, Weill Cornell Medical College, New York, NY, USA,Graduate Program in Neuroscience, Weill Cornell Medical College, New York, NY, USA,Division of Neurobiology, Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, NY, USA
| | - S Ra
- Department of Pediatrics, Division of Pediatric Neurology, Weill Cornell Medical College, New York, NY, USA
| | - Aditi M Rajadhyaksha
- Department of Pediatrics, Division of Pediatric Neurology, Weill Cornell Medical College, New York, NY, USA
| | - J K Britt
- Departments of Psychiatry and Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - H De Jesus-Cortes
- Departments of Psychiatry and Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - K L Gonzales
- Division of Neurobiology, Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, NY, USA
| | - A Lee
- Departments of Molecular Physiology and Biophysics and Neurology, University of Iowa, Iowa City, IA, USA
| | - S Moosmang
- Research Group 923, Technical University Munich, Munich, Germany
| | - F Hofmann
- Institute for Pharmacology, Technical University Munich, Munich, Germany
| | - A A Pieper
- Departments of Psychiatry and Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA,E-mails: and
| | - Anjali M Rajadhyaksha
- Department of Pediatrics, Division of Pediatric Neurology, Weill Cornell Medical College, New York, NY, USA,Graduate Program in Neuroscience, Weill Cornell Medical College, New York, NY, USA,E-mails: and
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Pieper AA, Brat DJ, O'Hearn E, Krug DK, Kaplin AI, Takahashi K, Greenberg JH, Ginty D, Molliver ME, Snyder SH. Differential neuronal localizations and dynamics of phosphorylated and unphosphorylated type 1 inositol 1,4,5-trisphosphate receptors. Neuroscience 2001; 102:433-44. [PMID: 11166129 DOI: 10.1016/s0306-4522(00)00470-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [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: 11/16/2022]
Abstract
Type 1 inositol 1,4,5-trisphosphate receptors are phosphorylated by cyclic-AMP-dependent protein kinase A at serines 1589 and 1755, with serine 1755 phosphorylation greatly predominating in the brain. Inositol 1,4,5-trisphosphate receptor protein kinase A phosphorylation augments Ca(2+) release. To assess type 1 protein kinase A phosphorylation dynamics in the intact organism, we developed antibodies selective for either serine 1755 phosphorylated or unphosphorylated species. Immunohistochemical studies reveal marked variation in localization. For example, in the hippocampus the phosphorylated type 1 inositol 1,4,5-trisphosphate receptor is restricted to CA1, while the unphosphorylated receptor occurs ubiquitously in CA1-CA3 and dentate gyrus granule cells. Throughout the brain the phosphorylated type 1 inositol 1,4,5-trisphosphate receptor is selectively enriched in dendrites, while the unphosphorylated receptor predominates in cell bodies. Focal cerebral ischemia in rats and humans is associated with dephosphorylation of type 1 inositol 1,4,5-trisphosphate receptors, and glutamatergic excitation of cerebellar Purkinje cells mediated by ibogaine elicits dephosphorylation of type 1 inositol 1,4,5-trisphosphate receptors that precedes evidence of excitotoxic neuronal degeneration. We have demonstrated striking variations in regional and subcellular distribution of inositol 1,4,5-trisphosphate receptor phosphorylation that may influence normal physiological intracellular Ca(2+) signaling in rat and human brain. We have further shown that the subcellular distribution of inositol 1,4,5-trisphosphate receptor phosphorylation in neurons is regulated by excitatory neurotransmission, as well as excitotoxic insult and neuronal ischemia-reperfusion. Phosphorylation dynamics of type 1 inositol 1,4,5-trisphosphate receptors may modulate intracellular Ca(2+) release and influence the cellular response to neurotoxic insults.
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Affiliation(s)
- A A Pieper
- The Johns Hopkins University, School of Medicine, Department of Neuroscience, 725 N. Wolfe Street, Baltimore, MD 21205, USA
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Pieper AA, Walles T, Wei G, Clements EE, Verma A, Snyder SH, Zweier JL. Myocardial postischemic injury is reduced by polyADPripose polymerase-1 gene disruption. Mol Med 2000; 6:271-82. [PMID: 10949908 PMCID: PMC1949947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND PolyADPribose polymerase (PARP) is activated by DNA strand breaks to catalyze the addition of ADPribose groups to nuclear proteins, especially PARP-1. Excessive polyADPribosylation leads to cell death through depletion of NAD+ and ATP. MATERIALS AND METHODS In vivo PARP activation in heart tissue slices was assayed through conversion of [33P]NAD+ into polyADPribose (PAR) following ischemia-reperfusion (I/R) and also monitored by immunohistochemical staining for PAR. Cardiac contractility, nitric oxide (NO), reactive oxygen species (ROS), NAD+ and ATP levels were examined in wild type (WT) and in PARP-1 gene-deleted (PARP-1(-/-)) isolated, perfused mouse hearts. Myocardial infarct size was assessed following coronary artery occlusion in rats treated with PARP inhibitors. RESULTS Ischemia-reperfusion (I/R) augmented formation of nitric oxide, oxygen free radicals and PARP activity. I/R induced decreases in cardiac contractility and NAD+ levels were attenuated in PARP-1(-/-) mouse hearts. PARP inhibitors reduced myocardial infarct size in rats. Residual polyADPribosylation in PARP-1(-/-) hearts may reflect alternative forms of PARP. CONCLUSIONS PolyADPribosylation from PARP-1 and other sources of enzymatic PAR synthesis is associated with cardiac damage following myocardial ischemia. PARP inhibitors may have therapeutic utility in myocardial disease.
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Affiliation(s)
- A A Pieper
- Department of Neuroscience, Pharmacology & Molecular Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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Pieper AA, Blackshaw S, Clements EE, Brat DJ, Krug DK, White AJ, Pinto-Garcia P, Favit A, Conover JR, Snyder SH, Verma A. Poly(ADP-ribosyl)ation basally activated by DNA strand breaks reflects glutamate-nitric oxide neurotransmission. Proc Natl Acad Sci U S A 2000; 97:1845-50. [PMID: 10677544 PMCID: PMC26524 DOI: 10.1073/pnas.97.4.1845] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.6] [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] [Accepted: 12/08/1999] [Indexed: 11/18/2022] Open
Abstract
Poly(ADP-ribose) polymerase (PARP) transfers ADP ribose groups from NAD(+) to nuclear proteins after activation by DNA strand breaks. PARP overactivation by massive DNA damage causes cell death via NAD(+) and ATP depletion. Heretofore, PARP has been thought to be inactive under basal physiologic conditions. We now report high basal levels of PARP activity and DNA strand breaks in discrete neuronal populations of the brain, in ventricular ependymal and subependymal cells and in peripheral tissues. In some peripheral tissues, such as skeletal muscle, spleen, heart, and kidney, PARP activity is reduced only partially in mice with PARP-1 gene deletion (PARP-1(-/-)), implicating activity of alternative forms of PARP. Glutamate neurotransmission involving N-methyl-d-aspartate (NMDA) receptors and neuronal nitric oxide synthase (nNOS) activity in part mediates neuronal DNA strand breaks and PARP activity, which are diminished by NMDA antagonists and NOS inhibitors and also diminished in mice with targeted deletion of nNOS gene (nNOS(-/-)). An increase in NAD(+) levels after treatment with NMDA antagonists or NOS inhibitors, as well as in nNOS(-/-) mice, indicates that basal glutamate-PARP activity regulates neuronal energy dynamics.
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Affiliation(s)
- A A Pieper
- Departments of Neuroscience, Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA
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LaPlaca MC, Raghupathi R, Verma A, Pieper AA, Saatman KE, Snyder SH, McIntosh TK. Temporal patterns of poly(ADP-ribose) polymerase activation in the cortex following experimental brain injury in the rat. J Neurochem 1999; 73:205-13. [PMID: 10386972 DOI: 10.1046/j.1471-4159.1999.0730205.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.2] [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: 11/20/2022]
Abstract
The activation of poly(ADP-ribose) polymerase, a DNA base excision repair enzyme, is indicative of DNA damage. This enzyme also undergoes site-specific proteolysis during apoptosis. Because both DNA fragmentation and apoptosis are known to occur following experimental brain injury, we investigated the effect of lateral fluid percussion brain injury on poly(ADP-ribose) polymerase activity and cleavage. Male Sprague-Dawley rats (n = 52) were anesthetized, subjected to fluid percussion brain injury of moderate severity (2.5-2.8 atm), and killed at 30 min, 2 h, 6 h, 24 h, 3 days, or 7 days postinjury. Genomic DNA from injured cortex at 24 h, but not at 30 min, was both fragmented and able to stimulate exogenous poly(ADP-ribose) polymerase. Endogenous poly(ADP-ribose) polymerase activity, however, was enhanced in the injured cortex at 30 min but subsequently returned to baseline levels. Slight fragmentation of poly(ADP-ribose) polymerase was detected in the injured cortex in the first 3 days following injury, but significant cleavage was detected at 7 days postinjury. Taken together, these data suggest that poly(ADP-ribose) polymerase-mediated DNA repair is initiated in the acute posttraumatic period but that subsequent poly(ADP-ribose) polymerase activation does not occur, possibly owing to delayed apoptosis-associated proteolysis, which may impair the repair of damaged DNA.
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Affiliation(s)
- M C LaPlaca
- Department of Neurosurgery, University of Pennsylvania School of Medicine, Philadelphia 19104, USA
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Takahashi K, Pieper AA, Croul SE, Zhang J, Snyder SH, Greenberg JH. Post-treatment with an inhibitor of poly(ADP-ribose) polymerase attenuates cerebral damage in focal ischemia. Brain Res 1999; 829:46-54. [PMID: 10350529 DOI: 10.1016/s0006-8993(99)01335-9] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.4] [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: 11/22/2022]
Abstract
Poly(ADP-ribose) polymerase (PARP) is thought to play a physio-logical role in maintaining genomic integrity and in the repair of DNA strand breaks. However, the activation of PARP by free radical-damaged DNA plays a pivotal role in mediating ischemia-reperfusion injury. The excessive activation of PARP causes a rapid depletion of intracellular energy leading to cell death. The present study examined the effect of post-ischemic pharmacological inhibition of PARP in a rat focal cerebral ischemia model. In Long-Evans rats, focal cerebral ischemia was produced by cauterization of the right distal middle cerebral artery (MCA) with bilateral temporary common carotid artery (CCA) occlusion for 90 min. A PARP inhibitor, 3, 4-dihydro-5-[4-(1-piperidinyl)butoxy]-1(2H)-isoquinolinone (DPQ; IC50=1 microM/l) was injected i.p. 30 min after the onset of MCA occlusion (control: 10, 20, 40 and 80 mg/kg; n=7 each). Twenty-four hours later, the total infarct volume was measured. Regional blood flow in the right parietal cortex decreased to approximately 20% of the baseline following MCA occlusion in all groups. PARP inhibition lead to a significant decrease in damaged volume in all treated groups with the largest reduction in the 40 mg/kg group (111.5+/-24. 8 mm3, mean+/-SD, p<0.01), compared to the control group (193.5+/-28. 6 mm3). We also found there was a significant increase of poly(ADP-ribose) immunoreactivity in the ischemic region, as compared to the contralateral side, with DPQ treatment diminishing poly(ADP-ribose) production. These findings indicate that DPQ exerts its neuroprotective effects in vivo by PARP inhibition and that PARP inhibitors may be effective for treating ischemic stroke, even when the treatment is initiated after the onset of ischemia.
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Affiliation(s)
- K Takahashi
- Cerebrovascular Research Center, Department of Neurology, University of Pennsylvania, School of Medicine, 429 Johnson Pavilion, 3610 Hamilton Walk, Philadelphia, PA 19104-6063, USA
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Abstract
Poly (ADP-ribose) polymerase (PARP) is a nuclear enzyme that is activated by DNA strand breaks to participate in DNA repair. Excessive activation of PARP, however, can deplete tissue stores of nicotinamide adenine dinucleotide (NAD), the PARP substrate which, with the resultant depletion of ATP, leads to cell death. In many cases of CNS damage, for example vascular stroke, nitric oxide release is a key stimulus to DNA damage and PARP activation. In conditions as diverse as focal cerebral ischaemia, myocardial infarction and toxin-induced diabetes, PARP inhibitors and PARP gene deletion afford dramatic protection from tissue damage. Accordingly, PARP inhibitors could provide novel therapeutic approaches in a wide range of clinical disorders.
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Affiliation(s)
- A A Pieper
- Department of Neuroscience, The Johns Hopkins University, School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205, USA
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Pieper AA, Brat DJ, Krug DK, Watkins CC, Gupta A, Blackshaw S, Verma A, Wang ZQ, Snyder SH. Poly(ADP-ribose) polymerase-deficient mice are protected from streptozotocin-induced diabetes. Proc Natl Acad Sci U S A 1999; 96:3059-64. [PMID: 10077636 PMCID: PMC15894 DOI: 10.1073/pnas.96.6.3059] [Citation(s) in RCA: 238] [Impact Index Per Article: 9.5] [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: 11/18/2022] Open
Abstract
Streptozotocin (STZ) selectively destroys insulin-producing beta islet cells of the pancreas providing a model of type I diabetes. Poly(ADP-ribose) polymerase (PARP) is a nuclear enzyme whose overactivation by DNA strand breaks depletes its substrate NAD+ and then ATP, leading to cellular death from energy depletion. We demonstrate DNA damage and a major activation of PARP in pancreatic islets of STZ-treated mice. These mice display a 500% increase in blood glucose and major pancreatic islet damage. In mice with homozygous targeted deletion of PARP (PARP -/-), blood glucose and pancreatic islet structure are normal, indicating virtually total protection from STZ diabetes. Partial protection occurs in PARP +/- animals. Thus, PARP activation may participate in the pathophysiology of type I diabetes, for which PARP inhibitors might afford therapeutic benefit.
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Affiliation(s)
- A A Pieper
- Departments of Neuroscience, Pharmacology and Molecular Sciences, and Psychiatry, The Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA
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