1
|
Khan Z, Terrien E, Delhommel F, Lefebvre-Omar C, Bohl D, Vitry S, Bernard C, Ramirez J, Chaffotte A, Ricquier K, Vincentelli R, Buc H, Prehaud C, Wolff N, Lafon M. Structure-based optimization of a PDZ-binding motif within a viral peptide stimulates neurite outgrowth. J Biol Chem 2019; 294:13755-13768. [PMID: 31346033 DOI: 10.1074/jbc.ra119.008238] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 07/11/2019] [Indexed: 11/06/2022] Open
Abstract
Protection of neuronal homeostasis is a major goal in the management of neurodegenerative diseases. Microtubule-associated Ser/Thr kinase 2 (MAST2) inhibits neurite outgrowth, and its inhibition therefore represents a potential therapeutic strategy. We previously reported that a viral protein (G-protein from rabies virus) capable of interfering with protein-protein interactions between the PDZ domain of MAST2 and the C-terminal moieties of its cellular partners counteracts MAST2-mediated suppression of neurite outgrowth. Here, we designed peptides derived from the native viral protein to increase the affinity of these peptides for the MAST2-PDZ domain. Our strategy involved modifying the length and flexibility of the noninteracting sequence linking the two subsites anchoring the peptide to the PDZ domain. Three peptides, Neurovita1 (NV1), NV2, and NV3, were selected, and we found that they all had increased affinities for the MAST2-PDZ domain, with Kd values decreasing from 1300 to 60 nm, while target selectivity was maintained. A parallel biological assay evaluating neurite extension and branching in cell cultures revealed that the NV peptides gradually improved neural activity, with the efficacies of these peptides for stimulating neurite outgrowth mirroring their affinities for MAST2-PDZ. We also show that NVs can be delivered into the cytoplasm of neurons as a gene or peptide. In summary, our findings indicate that virus-derived peptides targeted to MAST2-PDZ stimulate neurite outgrowth in several neuron types, opening up promising avenues for potentially using NVs in the management of neurodegenerative diseases.
Collapse
Affiliation(s)
- Zakir Khan
- Institut Pasteur, Unité de Neuroimmunologie Virale, UMR 3569, CNRS, Paris 75015, France
| | - Elouan Terrien
- Institut Pasteur, Unité de RMN des Biomolécules, UMR 3528, CNRS, Paris 75015, France
| | - Florent Delhommel
- Institut Pasteur, Unité de RMN des Biomolécules, UMR 3528, CNRS, Paris 75015, France
| | - Cynthia Lefebvre-Omar
- Institut du Cerveau et de la Moelle Epinière, ICM, U1127 INSERM, UMR 7225 CNRS, Sorbonne Université, Paris 75013, France
| | - Delphine Bohl
- Institut du Cerveau et de la Moelle Epinière, ICM, U1127 INSERM, UMR 7225 CNRS, Sorbonne Université, Paris 75013, France
| | - Sandrine Vitry
- Institut Pasteur, Unité de Neuroimmunologie Virale, UMR 3569, CNRS, Paris 75015, France
| | - Clara Bernard
- Institut Pasteur, Unité de Neuroimmunologie Virale, UMR 3569, CNRS, Paris 75015, France
| | - Juan Ramirez
- Institut Pasteur, Unité de RMN des Biomolécules, UMR 3528, CNRS, Paris 75015, France
| | - Alain Chaffotte
- Institut Pasteur, Unité de RMN des Biomolécules, UMR 3528, CNRS, Paris 75015, France
| | - Kevin Ricquier
- Institut Pasteur, Unité de RMN des Biomolécules, UMR 3528, CNRS, Paris 75015, France
| | - Renaud Vincentelli
- Unité Mixte de Recherche 7257, CNRS Aix-Marseille Université, Architecture et Fonction des Macromolécules Biologiques (AFMB), Marseille 13009, France
| | - Henri Buc
- Institut Pasteur, Paris 75015, France
| | - Christophe Prehaud
- Institut Pasteur, Unité de Neuroimmunologie Virale, UMR 3569, CNRS, Paris 75015, France
| | - Nicolas Wolff
- Institut Pasteur, Unité de RMN des Biomolécules, UMR 3528, CNRS, Paris 75015, France
| | - Monique Lafon
- Institut Pasteur, Unité de Neuroimmunologie Virale, UMR 3569, CNRS, Paris 75015, France
| |
Collapse
|
2
|
Pokharel S, Lee CH, Gilyazova N, Ibeanu GC. Analysis of Gene Expression and Neuronal Phenotype in Neuroscreen-1 (NS-1) Cells. INTERNATIONAL JOURNAL OF BIOMEDICAL INVESTIGATION 2018; 1:115. [PMID: 30687846 PMCID: PMC6345259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Neuroscreen-1 (NS-1) a sub-clone of pheochromocytoma (PC12) cell is gaining broad acceptance as in vitro neuronal model for biochemical and phenotypic assays due to robust growth and differentiation profiles. However, the molecular characteristics of the cell remains to be documented. In this study, we performed comparative analysis for expression of neuronal marker genes in undifferentiated and nerve growth factor (NGF) differentiated NS-1 and PC12 by qPCR and immunoblot assays. We show that differentiation of NS-1 occurred under low concentrations of NGF relative to PC12. Cell growth also occurred more rapidly in NS-1. Transcriptional analysis of neuronal marker genes showed comparable expression of tyrosine receptor kinases (Ntrk1, Ntrk2, NGFR/p75NTR) and muscarinic acetylcholine (Chrm1, Chrm2, Chrm3, Chrm4) receptors in unspecialized cells. Ntrk2, adenosine receptors (Adora1, Adora2A) and choline acetyltransferase (ChAT) were altered in undifferentiated NS-1. In contrast, Ntrk1, Ntrk2, Chrm2 transcripts were vastly increased in NS-1 with NGF exposure, while Ntrk3, Adora1 and Adora2A transcripts were reduced. In differentiated PC12, Chrm4 and ChAT were markedly upregulated. Our data suggests that differences in morphological and phenotypic characteristics that distinguish NS-1 from PC12 is likely the product of altered gene expression. Furthermore, expression of neuron type genes in NS-1 support its use as an alternative model to PC12.
Collapse
Affiliation(s)
- Smritee Pokharel
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
| | - Chang Hun Lee
- School of Dentistry, Medical College of Virginia, Richmond, Virginia, United States of America
| | - Nailya Gilyazova
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
| | - Gordon C. Ibeanu
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
- Department of Pharmaceutical Science, North Carolina Central University, Durham, North Carolina United States of America
| |
Collapse
|
3
|
Gliyazova NS, Ibeanu GC. The Chemical Molecule B355252 is Neuroprotective in an In Vitro Model of Parkinson's Disease. Cell Mol Neurobiol 2015; 36:1109-22. [PMID: 26649727 DOI: 10.1007/s10571-015-0304-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 11/08/2015] [Indexed: 12/11/2022]
Abstract
6-Hydroxydopamine (6-OHDA) is a neurotoxin frequently used to create in vitro and in vivo experimental models of Parkinson's disease (PD), a chronic neurodegenerative disorder largely resulting from damage to the nigrostriatal dopaminergic pathway. No effective drugs or therapies have been developed for this devastating disorder, and current regimens of symptomatic therapeutics only alleviate symptoms temporarily. Therefore, effective treatments that reverse or cure this disorder are urgently needed. The aim of the study described in this report was to investigate the therapeutic impact of B355252, an aryl thiophene sulfonamide chemical entity, in the widely recognized in vitro model of PD, and to characterize the molecular signaling pathways. We show here that 6-OHDA-induced cell death in HT22, a murine neuronal cell model, through a pathway that involves the mitochondria by increasing the levels of reactive oxygen species (ROS), raising intracellular calcium ([Ca(2+)]i), enhancing the release of cytochrome c to the cytosol, and promoting activation of stress-activated protein kinase/c-Jun NH2-terminal kinase (SAPK/JNK) signaling pathway. More importantly, we found that B355252 protected HT22 neurons against 6-OHDA toxin-induced neuronal cell death by significant attenuation of ROS production, blocking of mitochondrial depolarization, inhibition of cytochrome c release, sequestration of [Ca(2+)]i, modulation of JNK cascade, and strong inhibition of caspase 3/7 cleavage. Overall, this study demonstrates that death of neurons under toxic conditions characteristic of PD can be efficiently halted by B355252 and suggests that further development of the molecule could be potentially beneficial as a therapeutic prevention or treatment option for PD.
Collapse
Affiliation(s)
- Nailya S Gliyazova
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC, 27707, USA
| | - Gordon C Ibeanu
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC, 27707, USA. .,Department of Pharmaceutical Sciences, North Carolina Central University, Durham, NC, 27707, USA.
| |
Collapse
|