1
|
D'Incal CP, Cappuyns E, Choukri K, De Man K, Szrama K, Konings A, Bastini L, Van Meel K, Buys A, Gabriele M, Rizzuti L, Vitriolo A, Testa G, Mohn F, Bühler M, Van der Aa N, Van Dijck A, Kooy RF, Berghe WV. Tracing the invisible mutant ADNP protein in Helsmoortel-Van der Aa syndrome patients. Sci Rep 2024; 14:14710. [PMID: 38926592 PMCID: PMC11208605 DOI: 10.1038/s41598-024-65608-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 06/21/2024] [Indexed: 06/28/2024] Open
Abstract
Heterozygous de novo mutations in the Activity-Dependent Neuroprotective Homeobox (ADNP) gene underlie Helsmoortel-Van der Aa syndrome (HVDAS). Most of these mutations are situated in the last exon and we previously demonstrated escape from nonsense-mediated decay by detecting mutant ADNP mRNA in patient blood. In this study, wild-type and ADNP mutants are investigated at the protein level and therefore optimal detection of the protein is required. Detection of ADNP by means of western blotting has been ambiguous with reported antibodies resulting in non-specific bands without unique ADNP signal. Validation of an N-terminal ADNP antibody (Aviva Systems) using a blocking peptide competition assay allowed to differentiate between specific and non-specific signals in different sample materials, resulting in a unique band signal around 150 kDa for ADNP, above its theoretical molecular weight of 124 kDa. Detection with different C-terminal antibodies confirmed the signals at an observed molecular weight of 150 kDa. Our antibody panel was subsequently tested by immunoblotting, comparing parental and homozygous CRISPR/Cas9 endonuclease-mediated Adnp knockout cell lines and showed disappearance of the 150 kDa signal, indicative for intact ADNP. By means of both a GFPSpark and Flag-tag N-terminally fused to a human ADNP expression vector, we detected wild-type ADNP together with mutant forms after introduction of patient mutations in E. coli expression systems by site-directed mutagenesis. Furthermore, we were also able to visualize endogenous ADNP with our C-terminal antibody panel in heterozygous cell lines carrying ADNP patient mutations, while the truncated ADNP mutants could only be detected with epitope-tag-specific antibodies, suggesting that addition of an epitope-tag possibly helps stabilizing the protein. However, western blotting of patient-derived hiPSCs, immortalized lymphoblastoid cell lines and post-mortem patient brain material failed to detect a native mutant ADNP protein. In addition, an N-terminal immunoprecipitation-competent ADNP antibody enriched truncating mutants in overexpression lysates, whereas implementation of the same method failed to enrich a possible native mutant protein in immortalized patient-derived lymphoblastoid cell lines. This study aims to shape awareness for critical assessment of mutant ADNP protein analysis in Helsmoortel-Van der Aa syndrome.
Collapse
Affiliation(s)
- Claudio Peter D'Incal
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| | - Elisa Cappuyns
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Kaoutar Choukri
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Kevin De Man
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Kristy Szrama
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Anthony Konings
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Lina Bastini
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Kim Van Meel
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Amber Buys
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | | | - Ludovico Rizzuti
- Neurogenomics, Human Technopole, Viale Rita Levi-Montacini 1, 20157, Milan, Italy
- High Definition Disease Modelling Lab, Stem Cell and Organoid Epigenetics, IEO, European Institute of Oncology, IRCCS, 20141, Milan, Italy
- Department of Experimental Oncology, European Institute of Oncology IRCCS, Via Adamello 16, 20139, Milan, Italy
| | - Alessandro Vitriolo
- Neurogenomics, Human Technopole, Viale Rita Levi-Montacini 1, 20157, Milan, Italy
- High Definition Disease Modelling Lab, Stem Cell and Organoid Epigenetics, IEO, European Institute of Oncology, IRCCS, 20141, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Via Santa Sofia 9, 20122, Milan, Italy
| | - Giuseppe Testa
- Neurogenomics, Human Technopole, Viale Rita Levi-Montacini 1, 20157, Milan, Italy
- High Definition Disease Modelling Lab, Stem Cell and Organoid Epigenetics, IEO, European Institute of Oncology, IRCCS, 20141, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Via Santa Sofia 9, 20122, Milan, Italy
| | - Fabio Mohn
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Marc Bühler
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Nathalie Van der Aa
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Anke Van Dijck
- Family Medicine and Population Health (FAMPOP), Department of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - R Frank Kooy
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Wim Vanden Berghe
- Cognitive Genetics (COGNET) and Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| |
Collapse
|
2
|
Bhargava S, Kulkarni R, Dewangan B, Kulkarni N, Jiaswar C, Kumar K, Kumar A, Bodhe PR, Kumar H, Sahu B. Microtubule stabilising peptides: new paradigm towards management of neuronal disorders. RSC Med Chem 2023; 14:2192-2205. [PMID: 37974959 PMCID: PMC10650357 DOI: 10.1039/d3md00012e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 08/09/2023] [Indexed: 11/19/2023] Open
Abstract
Neuronal cells made of soma, axon, and dendrites are highly compartmentalized and possess a specialized transport system that can convey long-distance electrical signals for the cross-talk. The transport system is made up of microtubule (MT) polymers and MT-binding proteins. MTs play vital and diverse roles in various cellular processes. Therefore, defects and dysregulation of MTs and their binding proteins lead to many neurological disorders as exemplified by Parkinson's disease, Alzheimer's disease, amyotrophic lateral sclerosis, Huntington's disease, and many others. MT-stabilising agents (MSAs) altering the MT-associated protein connections have shown great potential for several neurodegenerative disorders. Peptides are an important class of molecules with high specificity, biocompatibility and are devoid of side effects. In the past, peptides have been explored in various neuronal disorders as therapeutics. Davunetide, a MT-stabilising octapeptide, has entered into phase II clinical trials for schizophrenia. Numerous examples of peptides emerging as MSAs reflect the emergence of a new paradigm for peptides which can be explored further as drug candidates for neuronal disorders. Although small molecule-based MSAs have been reviewed in the past, there is no systematic review in recent years focusing on peptides as MSAs apart from davunetide in 2013. Therefore, a systematic updated review on MT stabilising peptides may shed light on many hidden aspects and enable researchers to develop new therapies for diseases related to the CNS. In this review we have summarised the recent examples of peptides as MSAs.
Collapse
Affiliation(s)
- Shubhangi Bhargava
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Riya Kulkarni
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Bhaskar Dewangan
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Neeraj Kulkarni
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Chirag Jiaswar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Kunal Kumar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Amit Kumar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Praveen Reddy Bodhe
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Hemant Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research Ahmedabad India
| | - Bichismita Sahu
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Ahmedabad India
| |
Collapse
|
3
|
D'Incal CP, Van Rossem KE, De Man K, Konings A, Van Dijck A, Rizzuti L, Vitriolo A, Testa G, Gozes I, Vanden Berghe W, Kooy RF. Chromatin remodeler Activity-Dependent Neuroprotective Protein (ADNP) contributes to syndromic autism. Clin Epigenetics 2023; 15:45. [PMID: 36945042 PMCID: PMC10031977 DOI: 10.1186/s13148-023-01450-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/16/2023] [Indexed: 03/23/2023] Open
Abstract
BACKGROUND Individuals affected with autism often suffer additional co-morbidities such as intellectual disability. The genes contributing to autism cluster on a relatively limited number of cellular pathways, including chromatin remodeling. However, limited information is available on how mutations in single genes can result in such pleiotropic clinical features in affected individuals. In this review, we summarize available information on one of the most frequently mutated genes in syndromic autism the Activity-Dependent Neuroprotective Protein (ADNP). RESULTS Heterozygous and predicted loss-of-function ADNP mutations in individuals inevitably result in the clinical presentation with the Helsmoortel-Van der Aa syndrome, a frequent form of syndromic autism. ADNP, a zinc finger DNA-binding protein has a role in chromatin remodeling: The protein is associated with the pericentromeric protein HP1, the SWI/SNF core complex protein BRG1, and other members of this chromatin remodeling complex and, in murine stem cells, with the chromodomain helicase CHD4 in a ChAHP complex. ADNP has recently been shown to possess R-loop processing activity. In addition, many additional functions, for instance, in association with cytoskeletal proteins have been linked to ADNP. CONCLUSIONS We here present an integrated evaluation of all current aspects of gene function and evaluate how abnormalities in chromatin remodeling might relate to the pleiotropic clinical presentation in individual"s" with Helsmoortel-Van der Aa syndrome.
Collapse
Affiliation(s)
- Claudio Peter D'Incal
- Department of Medical Genetics, University of Antwerp, Prins Boudewijnlaan 43/6, 2650, Edegem, Belgium
- Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Epigenetic Signaling Lab (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Kirsten Esther Van Rossem
- Department of Medical Genetics, University of Antwerp, Prins Boudewijnlaan 43/6, 2650, Edegem, Belgium
| | - Kevin De Man
- Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Epigenetic Signaling Lab (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Anthony Konings
- Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Epigenetic Signaling Lab (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Anke Van Dijck
- Department of Medical Genetics, University of Antwerp, Prins Boudewijnlaan 43/6, 2650, Edegem, Belgium
| | - Ludovico Rizzuti
- High Definition Disease Modelling Lab, Stem Cell and Organoid Epigenetics, IEO, European Institute of Oncology, IRCCS, 20141, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, 20122, Milan, Italy
- Human Technopole, V. Le Rita Levi-Montalcini, 1, 20157, Milan, Italy
| | - Alessandro Vitriolo
- High Definition Disease Modelling Lab, Stem Cell and Organoid Epigenetics, IEO, European Institute of Oncology, IRCCS, 20141, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, 20122, Milan, Italy
- Human Technopole, V. Le Rita Levi-Montalcini, 1, 20157, Milan, Italy
| | - Giuseppe Testa
- High Definition Disease Modelling Lab, Stem Cell and Organoid Epigenetics, IEO, European Institute of Oncology, IRCCS, 20141, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, 20122, Milan, Italy
- Human Technopole, V. Le Rita Levi-Montalcini, 1, 20157, Milan, Italy
| | - Illana Gozes
- Elton Laboratory for Molecular Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine, Adams Super Center for Brain Studies and Sagol School of Neuroscience, Tel Aviv University, Sackler School of Medicine, 727, 69978, Tel Aviv, Israel
| | - Wim Vanden Berghe
- Protein Chemistry, Proteomics and Epigenetic Signaling (PPES), Epigenetic Signaling Lab (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
| | - R Frank Kooy
- Department of Medical Genetics, University of Antwerp, Prins Boudewijnlaan 43/6, 2650, Edegem, Belgium.
| |
Collapse
|
4
|
Cunha-Reis D, Caulino-Rocha A, Correia-de-Sá P. VIPergic neuroprotection in epileptogenesis: challenges and opportunities. Pharmacol Res 2021; 164:105356. [DOI: 10.1016/j.phrs.2020.105356] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/28/2020] [Accepted: 11/29/2020] [Indexed: 12/19/2022]
|
5
|
Sragovich S, Amram N, Yeheskel A, Gozes I. VIP/PACAP-Based Drug Development: The ADNP/NAP-Derived Mirror Peptides SKIP and D-SKIP Exhibit Distinctive in vivo and in silico Effects. Front Cell Neurosci 2020; 13:589. [PMID: 31992971 PMCID: PMC6971164 DOI: 10.3389/fncel.2019.00589] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 12/24/2019] [Indexed: 01/07/2023] Open
Abstract
Activity-dependent neuroprotective protein (ADNP) was discovered and first characterized in the laboratory of Prof. Illana Gozes to be regulated by vasoactive intestinal peptide (VIP), and pituitary adenylate cyclase-activating peptide (PACAP) toward neuroprotection. Importantly, ADNP is a master regulator of >400 genes, essential for brain formation, while its haploinsufficiency causes cognitive impairments. Recently, de novo mutations in ADNP were identified as leading to the autism-like ADNP syndrome, mimicked by the Adnp-deficient mouse model. Furthermore, novel peptide derivatives of the neuroprotective ADNP-snippet NAP (NAPVSIPQ), developed in our laboratory, include SKIP and the mirroring all D-amino acid SKIP (D-SKIP). We now extended previous evidence suggesting potential antagonistic features for D-SKIP, compared with the neuroprotective peptide SKIP, as was observed by NMR analysis and social/olfactory functional testing. Here, an impact of the Adnp genotype was observed in the Morris Water Maze (MWM) test measuring cognition, coupled with improvement by SKIP, opposing the inert/exacerbating effect of D-SKIP. In the elevated plus-maze and open field tests measuring anxiety-related behaviors, contrasting effects of SKIP and D-SKIP were found, with SKIP improving/preserving the normal phenotype of the mouse, and D-SKIP causing alterations. Lastly, an in silico analysis suggested that SKIP and D-SKIP bind the microtubule end binding (EB) proteins EB1 and EB3 in different conformations, thereby indicating distinctive natures for the two peptides, potentially mediating differential in vivo effects. Altogether, our findings corroborate the notion of D-SKIP acting as an antagonist, thus distinguishing it from the neuroprotective SKIP.
Collapse
Affiliation(s)
- Shlomo Sragovich
- The Lily and Avraham Gildor Chair for the Investigation of Growth Factors, The Elton Laboratory for Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, Tel Aviv, Israel
| | - Noy Amram
- The Lily and Avraham Gildor Chair for the Investigation of Growth Factors, The Elton Laboratory for Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, Tel Aviv, Israel
| | - Adva Yeheskel
- Bioinformatics Unit, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Illana Gozes
- The Lily and Avraham Gildor Chair for the Investigation of Growth Factors, The Elton Laboratory for Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, Tel Aviv, Israel
| |
Collapse
|
6
|
Genetic mechanisms of regression in autism spectrum disorder. Neurosci Biobehav Rev 2019; 102:208-220. [DOI: 10.1016/j.neubiorev.2019.04.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 02/12/2019] [Accepted: 04/28/2019] [Indexed: 12/17/2022]
|
7
|
Lupaescu AV, Jureschi M, Ciobanu CI, Ion L, Zbancioc G, Petre BA, Drochioiu G. FTIR and MS Evidence for Heavy Metal Binding to Anti-amyloidal NAP-Like Peptides. Int J Pept Res Ther 2018. [DOI: 10.1007/s10989-018-9672-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
8
|
Martins IJ. The Role of Clinical Proteomics, Lipidomics, and Genomics in the Diagnosis of Alzheimer's Disease. Proteomes 2016; 4:proteomes4020014. [PMID: 28248224 PMCID: PMC5217345 DOI: 10.3390/proteomes4020014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/24/2016] [Accepted: 03/28/2016] [Indexed: 02/07/2023] Open
Abstract
The early diagnosis of Alzheimer’s disease (AD) has become important to the reversal and treatment of neurodegeneration, which may be relevant to premature brain aging that is associated with chronic disease progression. Clinical proteomics allows the detection of various proteins in fluids such as the urine, plasma, and cerebrospinal fluid for the diagnosis of AD. Interest in lipidomics has accelerated with plasma testing for various lipid biomarkers that may with clinical proteomics provide a more reproducible diagnosis for early brain aging that is connected to other chronic diseases. The combination of proteomics with lipidomics may decrease the biological variability between studies and provide reproducible results that detect a community’s susceptibility to AD. The diagnosis of chronic disease associated with AD that now involves genomics may provide increased sensitivity to avoid inadvertent errors related to plasma versus cerebrospinal fluid testing by proteomics and lipidomics that identify new disease biomarkers in body fluids, cells, and tissues. The diagnosis of AD by various plasma biomarkers with clinical proteomics may now require the involvement of lipidomics and genomics to provide interpretation of proteomic results from various laboratories around the world.
Collapse
Affiliation(s)
- Ian James Martins
- School of Medical Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup 6027, Australia.
| |
Collapse
|
9
|
Gozes I, Sragovich S, Schirer Y, Idan-Feldman A. D-SAL and NAP: Two Peptides Sharing a SIP Domain. J Mol Neurosci 2016; 59:220-31. [DOI: 10.1007/s12031-015-0701-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
10
|
Arya A, Meena R, Sethy NK, Das M, Sharma M, Bhargava K. NAP (davunetide) protects primary hippocampus culture by modulating expression profile of antioxidant genes during limiting oxygen conditions. Free Radic Res 2015; 49:440-52. [DOI: 10.3109/10715762.2015.1011153] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
11
|
Vandeweyer G, Helsmoortel C, Van Dijck A, Vulto-van Silfhout AT, Coe BP, Bernier R, Gerdts J, Rooms L, van den Ende J, Bakshi M, Wilson M, Nordgren A, Hendon LG, Abdulrahman OA, Romano C, de Vries BBA, Kleefstra T, Eichler EE, Van der Aa N, Kooy RF. The transcriptional regulator ADNP links the BAF (SWI/SNF) complexes with autism. AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS 2014; 166C:315-26. [PMID: 25169753 DOI: 10.1002/ajmg.c.31413] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Mutations in ADNP were recently identified as a frequent cause of syndromic autism, characterized by deficits in social communication and interaction and restricted, repetitive behavioral patterns. Based on its functional domains, ADNP is a presumed transcription factor. The gene interacts closely with the SWI/SNF complex by direct and experimentally verified binding of its C-terminus to three of its core components. A detailed and systematic clinical assessment of the symptoms observed in our patients allows a detailed comparison with the symptoms observed in other SWI/SNF disorders. While the mutational mechanism of the first 10 patients identified suggested a gain of function mechanism, an 11th patient reported here is predicted haploinsufficient. The latter observation may raise hope for therapy, as addition of NAP, a neuroprotective octapeptide named after the first three amino acids of the sequence NAPVSPIQ, has been reported by others to ameliorate some of the cognitive abnormalities observed in a knockout mouse model. It is concluded that detailed clinical and molecular studies on larger cohorts of patients are necessary to establish a better insight in the genotype phenotype correlation and in the mutational mechanism.
Collapse
|
12
|
Abstract
OBJECTIVE To evaluate whether peptides given to adult mice with Down syndrome prevent learning deficits, and to delineate the mechanisms behind the protective effect. METHODS Ts65Dn mice were treated for 9 days with peptides D-NAPVSIPQ (NAP)+D-SALLRSIPA (SAL) or placebo, and wild-type animals were treated with placebo. Beginning on treatment day 4, the mice were tested for learning using the Morris watermaze. Probe tests for long-term memory were performed on treatment day 9 and 10 days after treatment stopped. Open-field testing was performed before and after the treatment. Calibrator-normalized relative real-time polymerase chain reaction (PCR) with glyceraldehyde-3-phosphate dehydrogenase (GAPD) standardization was performed on the whole brain and hippocampus for activity-dependent neuroprotective protein, vasoactive intestinal peptide (VIP), glial fibrillary acidic protein (GFAP), NR2B, NR2A, and γ-aminobutyric acid type A (GABAA)-α5. Statistics included analysis of variance and the Fisher protected least significant difference, with P<.05 significant. RESULTS The Ts65Dn plus placebo animals did not learn over the 5-day period compared with the controls (P<.001). The Ts65Dn +(D-NAP+D-SAL) learned significantly better than the Ts65Dn plus placebo (P<.05), and they retained learning similar to controls on treatment day 9, but not after 10 days of no treatment. Treatment with D-NAP+D-SAL prevented the Ts65Dn hyperactivity. Adult administration of D-NAP+D-SAL prevented changes in activity-dependent neuroprotective protein, intestinal peptide, and NR2B with levels similar to controls (all P<.05). CONCLUSION Adult treatment with D-NAP+D-SAL prevented learning deficit in Ts65Dn, a model of Down syndrome. Possible mechanisms of action include reversal of vasoactive intestinal peptide and activity-dependent neuroprotective protein dysregulation, as well as increasing expression of NR2B, thus facilitating learning.
Collapse
|
13
|
Furman S, Steingart RA, Mandel S, Hauser JM, Brenneman DE, Gozes I. Subcellular localization and secretion of activity-dependent neuroprotective protein in astrocytes. ACTA ACUST UNITED AC 2012; 1:193-9. [PMID: 16845437 PMCID: PMC1502393 DOI: 10.1017/s1740925x05000013] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Activity-dependent neuroprotective protein (ADNP, approximately 123562.8 Da), is synthesized in astrocytes and expression of ADNP mRNA is regulated by the neuroprotective peptide vasoactive intestinal peptide (VIP). The gene that encodes ADNP is conserved in human, rat and mouse, and contains a homeobox domain profile that includes a nuclear-export signal and a nuclear-localization signal. ADNP is essential for embryonic brain development, and NAP, an eight-amino acid peptide that is derived from ADNP, confers potent neuroprotection. Here, we investigate the subcellular localization of ADNP through cell fractionation, gel electrophoresis, immunoblotting and immunocytochemistry using alpha-CNAP, an antibody directed to the neuroprotective NAP fragment that constitutes part of an N-terminal epitope of ADNP. Recombinant ADNP was used as a competitive ligand to measure antibody specificity. ADNP-like immunoreactivity was found in the nuclear cell fraction of astrocytes and in the cytoplasm. In the cytoplasm, ADNP-like immunoreactivity colocalized with tubulin-like immunoreactivity and with microtubular structures, but not with actin microfilaments. Because microtubules are key components of developing neurons and brain, possible interaction between tubulin and ADNP might indicate a functional correlate to the role of ADNP in the brain. In addition, ADNP-like immunoreactivity in the extracellular milieu of astrocytes increased by approximately 1.4 fold after incubation of the astrocytes with VIP. VIP is known to cause astrocytes to secrete neuroprotective/neurotrophic factors, and we suggest that ADNP constitutes part of this VIP-stimulated protective milieu.
Collapse
Affiliation(s)
- Sharon Furman
- Department of Clinical Biochemistry Sackler Faculty of Medicine Tel-Aviv University
| | - Ruth A. Steingart
- Department of Clinical Biochemistry Sackler Faculty of Medicine Tel-Aviv University
| | - Shmuel Mandel
- Department of Clinical Biochemistry Sackler Faculty of Medicine Tel-Aviv University
| | - Janet M. Hauser
- Section on Developmental and Molecular Pharmacology Laboratory of Developmental Neurobiology National Institute of Child Health and Human Development Bethesda MD 20892
| | - Douglas E. Brenneman
- Section on Developmental and Molecular Pharmacology Laboratory of Developmental Neurobiology National Institute of Child Health and Human Development Bethesda MD 20892
| | - Illana Gozes
- Department of Clinical Biochemistry Sackler Faculty of Medicine Tel-Aviv University
| |
Collapse
|
14
|
Couvineau A, Laburthe M. VPAC receptors: structure, molecular pharmacology and interaction with accessory proteins. Br J Pharmacol 2012; 166:42-50. [PMID: 21951273 PMCID: PMC3415636 DOI: 10.1111/j.1476-5381.2011.01676.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The vasoactive intestinal peptide (VIP) is a neuropeptide with wide distribution in both central and peripheral nervous systems, where it plays important regulatory role in many physiological processes. VIP displays a large biological functions including regulation of exocrine secretions, hormone release, fetal development, immune responses, etc. VIP appears to exert beneficial effect in neuro-degenerative and inflammatory diseases. The mechanism of action of VIP implicates two subtypes of receptors (VPAC1 and VPAC2), which are members of class B receptors belonging to the super-family of GPCR. This article reviews the current knowledge regarding the structure and molecular pharmacology of VPAC receptors. The structure-function relationship of VPAC1 receptor has been extensively studied, allowing to understand the molecular basis for receptor affinity, specificity, desensitization and coupling to adenylyl cyclase. Those studies have clearly demonstrated the crucial role of the N-terminal ectodomain (N-ted) of VPAC1 receptor in VIP recognition. By using different approaches including directed mutagenesis, photoaffinity labelling, NMR, molecular modelling and molecular dynamic simulation, it has been shown that the VIP molecule interacts with the N-ted of VPAC1 receptor, which is itself structured as a 'Sushi' domain. VPAC1 receptor also interacts with a few accessory proteins that play a role in cell signalling of receptors. Recent advances in the structural characterization of VPAC receptor and more generally of class B GPCRs will lead to the design of new molecules, which could have considerable interest for the treatment of inflammatory and neuro-degenerative diseases.
Collapse
Affiliation(s)
- Alain Couvineau
- Centre de recherche biomédicale Bichat-Beaujon, Faculté de médecine X. Bichat, Paris, France. or
| | | |
Collapse
|
15
|
Braitch M, Kawabe K, Nyirenda M, Gilles LJ, Robins RA, Gran B, Murphy S, Showe L, Constantinescu CS. Expression of activity-dependent neuroprotective protein in the immune system: possible functions and relevance to multiple sclerosis. Neuroimmunomodulation 2010; 17:120-5. [PMID: 19923857 PMCID: PMC3701887 DOI: 10.1159/000258695] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Accepted: 07/22/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Activity-dependent neuroprotector (ADNP) is a neuroprotective molecule containing an 8-amino acid peptide, NAPVSIPQ (NAP), that is sufficient for its neuroprotective effects. OBJECTIVE To assess the expression of ADNP in the human immune system in normal subjects and multiple sclerosis patients. MaterialsandMethods: ADNP expression was assessed in peripheral blood mononuclear cells (PBMCs) from healthy donors and multiple sclerosis (MS) patients using staining with anti-ADNP (NAP) antibodies and markers for T cells, B cells, monocytes and natural killer cells. ADNP mRNA was determined in peripheral blood from MS patients (n = 24) and matched controls (n = 21). Expression of activation markers CD69 and CD154 and of IFN-gamma was assessed by flow cytometry in stimulated PBMCs. Effects of NAP on immune cell proliferation was assessed by tritiated thymidine incorporation. RESULTS Monocytes, B cells and T cells, but not regulatory (CD4+CD25+) T cells expressed ADNP. NAP peptide decreased the expression of CD69, CD154 and IFN-gamma in PBMC and caused suppressed anti-CD3-/anti-CD28-stimulated PBMC proliferation. ADNP mRNA was reduced in MS compared to control peripheral blood. CONCLUSION ADNP is expressed in many immune system cells. ADNP mRNA is reduced in PBMCs in MS. The peptide NAP, which plays an important role in neuroprotection, has potential immunomodulatory properties.
Collapse
MESH Headings
- Antigens, Surface/analysis
- Antigens, Surface/metabolism
- B-Lymphocytes/immunology
- B-Lymphocytes/metabolism
- Biomarkers/analysis
- Biomarkers/metabolism
- Cell Proliferation/drug effects
- Cells, Cultured
- Cytoprotection/genetics
- Cytoprotection/immunology
- Down-Regulation/genetics
- Down-Regulation/immunology
- Flow Cytometry
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- Humans
- Immune System/immunology
- Immune System/metabolism
- Immunity, Innate/genetics
- Immunity, Innate/immunology
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/metabolism
- Monocytes/immunology
- Monocytes/metabolism
- Multiple Sclerosis/genetics
- Multiple Sclerosis/immunology
- Multiple Sclerosis/metabolism
- Nerve Tissue Proteins/genetics
- Nerve Tissue Proteins/metabolism
- Neuroimmunomodulation/physiology
- Oligopeptides/genetics
- Oligopeptides/metabolism
- Oligopeptides/pharmacology
- RNA, Messenger/analysis
- RNA, Messenger/metabolism
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
Collapse
Affiliation(s)
- Manjit Braitch
- Division of Clinical Neurology, School of Clinical Sciences, UK
| | - Kiyokazu Kawabe
- Division of Clinical Neurology, School of Clinical Sciences, UK
| | | | | | - R. Adrian Robins
- Division of Immunology, School of Molecular Medical Sciences, Medical School, Queens Medical Centre, Nottingham University, Nottingham, UK
| | - Bruno Gran
- Division of Clinical Neurology, School of Clinical Sciences, UK
| | - Sean Murphy
- Department of Neurological Surgery, University of Washington, Seattle, Wash., USA
| | - Louise Showe
- SystemsBiology Division, Genomics Core, The Wistar Institute, Philadelphia, Pa., USA
| | - Cris S. Constantinescu
- Division of Clinical Neurology, School of Clinical Sciences, UK
- *Prof. Cris S. Constantinescu, Division of Clinical Neurology, Medical School, B Floor, Queens Medical Centre, Nottingham University, Nottingham NG7 2UH (UK), Tel. +44 115 875 4597, Fax +44 115 970 9738, E-Mail
| |
Collapse
|
16
|
Benagiano V, Flace P, Lorusso L, Rizzi A, Bosco L, Cagiano R, Ambrosi G. Vasoactive intestinal polypeptide immunoreactivity in the human cerebellum: qualitative and quantitative analyses. J Anat 2009; 215:256-66. [PMID: 19552726 DOI: 10.1111/j.1469-7580.2009.01110.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Although autoradiographic, reverse transcription-polymerase chain reaction and immunohistochemical studies have demonstrated receptors for vasoactive intestinal polypeptide (VIP) in the cerebellum of various species, immunohistochemistry has never shown immunoreactivity for VIP within cerebellar neuronal bodies and processes. The present study aimed to ascertain whether VIP immunoreactivity really does exist in the human cerebellum by making a systematic analysis of samples removed post-mortem from all of the cerebellar lobes. The study was carried out using light microscopy immunohistochemical techniques based on a set of four different antibodies (three polyclonal and one monoclonal) against VIP, carefully selected on the basis of control tests performed on human colon. All of the antibodies used showed VIP-immunoreactive neuronal bodies and processes distributed in the cerebellar cortex and subjacent white matter of all of the cerebellum lobes, having similar qualitative patterns of distribution. Immunoreactive neurons included subpopulations of the main neuron types of the cortex. Statistical analysis of the quantitative data on the VIP immunoreactivity revealed by the different antibodies in the different cerebellar lobes did not demonstrate any significant differences. In conclusion, using four different anti-VIP antibodies, the first evidence of VIP immunoreactivity is herein supplied in the human post-mortem cerebellum, with similar qualitative/quantitative patterns of distribution among the different cerebellum lobes. Owing to the function performed by VIP as a neurotransmitter/neuromodulator, it is a candidate for a role in intrinsic and extrinsic (projective) circuits of the cerebellum, in agreement with previous demonstrations of receptors for VIP in the cerebellar cortex and nuclei. As VIP signalling pathways are implicated in the regulation of cognitive and psychic functions, cerebral blood flow and metabolism, processes of histomorphogenesis, differentiation and outgrowth of nervous tissues, the results of this study could be applied to clinical neurology and psychiatry, opening new perspectives for the interpretation of neurodevelopment disorders and development of new therapeutic strategies in cerebellar diseases.
Collapse
Affiliation(s)
- Vincenzo Benagiano
- Dipartimento di Anatomia Umana e Istologia R. Amprino, University of Bari, 71124 Bari, Italy.
| | | | | | | | | | | | | |
Collapse
|
17
|
Vink J, Incerti M, Toso L, Roberson R, Abebe D, Spong CY. Prenatal NAP+SAL prevents developmental delay in a mouse model of Down syndrome through effects on N-methyl-D-aspartic acid and gamma-aminobutyric acid receptors. Am J Obstet Gynecol 2009; 200:524.e1-4. [PMID: 19327737 DOI: 10.1016/j.ajog.2009.01.052] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2008] [Revised: 01/20/2009] [Accepted: 01/29/2009] [Indexed: 01/02/2023]
Abstract
OBJECTIVE Down syndrome (DS) affects 1/800 infants. Prenatal NAPVSIPQ (NAP) and SALLRSIPA (SAL) (NAP+SAL) prevent developmental delay in Ts65Dn mice, a mouse model of DS. We investigated whether this finding involves N-methyl-D-aspartic acid and gamma-aminobutyric acid (GABA) receptor subunits. STUDY DESIGN Pregnant Ts65Dn mice were treated with placebo or NAP+SAL on gestational days 8-12. After developmental delay prevention was shown, 4 trisomic (Ts), 4 control, and 3 Ts+NAP+SAL adult offspring brains (from 3 litters) were collected. Calibrator-normalized real-time polymerase chain reaction was performed using primers for N-methyl-D-aspartic acid subunits NR2A and NR2B, and for GABA subunits GABA(A)alpha5 and GABA(A)beta3 with glyceraldehyde-3-phosphate dehydrogenase standardization. Statistics included analysis of variance and Fisher PLSD with P < .05 as significant. RESULTS NR2A, NR2B, and GABA(A)beta3 levels were decreased in Ts vs control (all P < .05). Prenatal NAP+SAL increased NR2A, NR2B, and GABA(A)beta3 to levels similar to control (all P < .05). A significant difference in GABA(A)alpha5 levels was not found. CONCLUSION Prenatal NAP+SAL increases NR2A, NR2B, and GABA(A)beta3 expression in adult DS mice to levels similar to controls. This may explain how NAP+SAL improve developmental milestone achievement.
Collapse
Affiliation(s)
- Joy Vink
- Unit on Perinatal and Developmental Neurobiology, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | | | | | | | | | | |
Collapse
|
18
|
QIN LIYA, LIU YUXIN, QIAN XUN, HONG JAUSHYONG, BLOCK MICHELLEL. Microglial NADPH Oxidase Mediates Leucine Enkephalin Dopaminergic Neuroprotection. Ann N Y Acad Sci 2008. [DOI: 10.1111/j.1749-6632.2005.tb00016.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
19
|
Thippeswamy T, Howard MR, Cosgrave AS, Arora DK, McKay JS, Quinn JP. Nitric oxide-NGF mediated PPTA/SP, ADNP, and VIP expression in the peripheral nervous system. J Mol Neurosci 2007; 33:268-77. [PMID: 17952636 DOI: 10.1007/s12031-007-0066-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2006] [Accepted: 11/30/2006] [Indexed: 12/14/2022]
Abstract
Nerve growth factor (NGF)-deprivation or axotomy of dorsal root ganglion (DRG) neurons causes stress, which they cope by triggering various mechanisms. Among several molecular changes, in the present study, we demonstrate preprotachykinin-A-substance P (PPTA-SP) and activity-dependent neuroprotective protein-vasoactive intestinal peptide (ADNP-VIP) expression pattern using DRG neurons-Schwann cells coculture and axotomy model. In the presence of NGF, DRG cultures showed high levels of PPTA and ADNP mRNA expression, which were significantly suppressed in the absence of NGF and/or nitric oxide synthase (NOS) inhibition by NG-nitro-L-arginine methyl ester (L-NAME), suggesting that both NGF and nitric oxide (NO) can regulate PPTA and ADNP expression. However, treating coculture with NO donor, diethylenetriamine nitric oxide (DETA-NO) did not increase PPTA and ADNP expression in the presence or absence of NGF, although there was a marginal increase in ADNP expression in the absence of NGF. NGF-deprivation increases endogenous NO; thus, DETA-NO had no further effect on PPTA and ADNP expression. Alternatively, NGF produced from NO-stimulated Schwann cells influence gene expression. In addition, interestingly, DETA-NO treatment of Schwann cells alone suppresses both PPTA and ADNP, suggesting differential response of DRG neurons-Schwann cells coculture to DETA-NO. SP and ADNP immunostaining of axotomized DRGs revealed significant reduction in SP and ADNP compared to intact DRG, which was partially recovered in neuronal NOS blocker, 7-nitroindazole (7-NI)-treated DRGs, particularly intense ADNP staining in satellite glia. As ADNP is VIP-responsive gene, we further explored VIP expression in DRGs. Axotomy increased VIP in DRG neurons, but 7-NI treatment caused intense VIP staining in satellite glia. These observations suggest a complex interaction of NO-NGF with PPTA/SP and ADNP-VIP in neuron-glial communication when neurons are stressed.
Collapse
Affiliation(s)
- Thimmasettappa Thippeswamy
- Department of Veterinary Preclinical Sciences, University of Liverpool, Brownlowhill Street, Liverpool, L69 7ZJ, UK.
| | | | | | | | | | | |
Collapse
|
20
|
Gozes I. Activity-dependent neuroprotective protein: from gene to drug candidate. Pharmacol Ther 2007; 114:146-54. [PMID: 17363064 DOI: 10.1016/j.pharmthera.2007.01.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2006] [Accepted: 01/12/2007] [Indexed: 01/13/2023]
Abstract
Activity-dependent neuroprotective protein (ADNP) is essential for brain formation. The gene encoding ADNP is highly conserved and abundantly expressed in the brain. ADNP contains a homeobox profile and a peptide motif providing neuroprotection against a variety of cytotoxic insults. ADNP mRNA and protein expression responds to brain injury and oscillates as a function of the estrus cycle. The plastic nature of ADNP expression is correlated with brain protection and an association between neuroendocrine regulation and neuroprotection is put forth with ADNP as a focal point. Further understanding of neuroprotective molecules should pave the path to better diagnostics and therapies. In this respect, structure-activity studies have identified a short 8 amino acid peptide in ADNP/NAPVSIPQ (NAP) that provides potent neuroprotection. NAP is currently in clinical development for neuroprotection.
Collapse
Affiliation(s)
- Illana Gozes
- The Adams Super-Center for Brain Studies & Levi-Edersheim-Gitter fMRI Institute, Department of Human Molecular Genetics and Biochemistry, Tel Aviv University, Tel Aviv 69978, Israel.
| |
Collapse
|
21
|
Mandel S, Rechavi G, Gozes I. Activity-dependent neuroprotective protein (ADNP) differentially interacts with chromatin to regulate genes essential for embryogenesis. Dev Biol 2006; 303:814-24. [PMID: 17222401 DOI: 10.1016/j.ydbio.2006.11.039] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2006] [Revised: 11/21/2006] [Accepted: 11/21/2006] [Indexed: 11/16/2022]
Abstract
Complete deficiency in activity-dependent neuroprotective protein (ADNP) results in neural tube closure defects and death at days 8.5-9.5 of gestation in the mouse (E8.5-9.5). To elucidate ADNP associated pathways, Affymetrix 22,690-oligonucleotide-based microarrays were used on ADNP knockout and control mouse embryos (E9) separated completely from extra embryonic tissue. Marked differences in expression profiles between ADNP-deficient embryos and ADNP-expressing embryos were discovered. Specifically, a group of dramatically up-regulated gene transcripts in the ADNP-deficient embryos were clustered into a family encoding for proteins enriched in the visceral endoderm such as apolipoproteins, cathepsins and methallotionins. In contrast, a down regulated gene cluster associated with ADNP-deficiency in the developing embryo consisted of organogenesis markers including neurogenesis (Ngfr, neurogenin1, neurod1) and heart development (Myl2). The pluripotent P19 cells were used for ADNP-chromatin-immunoprecipitation, showing direct interactions with multiple relevant gene promoters including members of the up-regulated as well as the down-regulated gene clusters. A comparison between non-differentiated and neuro-differentiated P19 cells revealed increased chromatin interaction of ADNP with chromatin from differentiated cells. These results place ADNP at a crucial point of gene regulation, repressing potential endoderm genes and enhancing genes associated with organogenesis/neurogenesis.
Collapse
Affiliation(s)
- Shmuel Mandel
- Department of Human Molecular Genetics and Biochemistry, Tel Aviv University, Tel Aviv 69978, Israel
| | | | | |
Collapse
|
22
|
Hanson LR, Frey WH. Strategies for intranasal delivery of therapeutics for the prevention and treatment of neuroAIDS. J Neuroimmune Pharmacol 2006; 2:81-6. [PMID: 18040829 DOI: 10.1007/s11481-006-9039-x] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2006] [Accepted: 08/14/2006] [Indexed: 11/29/2022]
Abstract
Intranasal drug administration is a noninvasive method of bypassing the blood-brain barrier (BBB) to deliver neurotrophins and other therapeutic agents to the brain and spinal cord. This method allows drugs that do not cross the BBB to be delivered to the central nervous system (CNS) and eliminates the need for systemic delivery, thereby reducing unwanted systemic side effects. Delivery from the nose to the CNS occurs within minutes along both the olfactory and trigeminal neural pathways. Intranasal delivery occurs by an extracellular route and does not require that drugs bind to any receptor or undergo axonal transport. Intranasal delivery also targets the nasal associated lymphatic tissues (NALT) and deep cervical lymph nodes. In addition, intranasally administered therapeutics are observed at high levels in the blood vessel walls and perivascular spaces of the cerebrovasculature. Using this intranasal method in animal models, researchers have successfully reduced stroke damage, reversed Alzheimer's neurodegeneration, reduced anxiety, improved memory, stimulated cerebral neurogenesis, and treated brain tumors. In humans, intranasal insulin has been shown to improve memory in normal adults and patients with Alzheimer's disease. Intranasal delivery strategies that can be employed to treat and prevent NeuroAIDS include: (1) target antiretrovirals to reach HIV that harbors in the CNS; (2) target therapeutics to protect neurons in the CNS; (3) modulate the neuroimmune function of moncyte/macrophages by targeting the lymphatics, perivascular spaces of the cerebrovasculature, and the CNS; and (4) improve memory and cognitive function by targeting therapeutics to the CNS.
Collapse
Affiliation(s)
- Leah R Hanson
- Alzheimer's Research Center at Regions Hospital, HealthPartners Research Foundation, 640 Jackson Street, Mailstop 11203A, St. Paul, Minnesota, MN, USA
| | | |
Collapse
|
23
|
Nakamachi T, Li M, Shioda S, Arimura A. Signaling involved in pituitary adenylate cyclase-activating polypeptide-stimulated ADNP expression. Peptides 2006; 27:1859-64. [PMID: 16564114 DOI: 10.1016/j.peptides.2006.01.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2005] [Revised: 01/20/2006] [Accepted: 01/20/2006] [Indexed: 10/24/2022]
Abstract
Activity-dependent neurotrophic protein (ADNP) was discovered as a novel response gene for VIP and has neuroprotective potential. When the VIP paralog, PACAP38 was added to mouse neuron-glia co-cultures, it induced ADNP mRNA expression in a bimodal fashion at subpico- and nanomolar concentrations with greater response at subpicomolar level. The response was attenuated by a PAC1-R antagonist at both concentrations and by a VPAC1-R antagonist at nanomolar concentration only. An IP3/PLC inhibitor attenuated the response at both concentrations of PACAP38, but a MAPK inhibitor had no effect. A PKA inhibitor suppressed the response at nanomolar concentration only. These findings suggest that ADNP expression is mediated through multiple receptors and signaling pathways that are regulated by different concentrations of PACAP.
Collapse
Affiliation(s)
- Tomoya Nakamachi
- U.S.-Japan Biomedical Research Laboratories, Department of Medicine, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | | | | | | |
Collapse
|
24
|
Steingart RA, Gozes I. Recombinant activity-dependent neuroprotective protein protects cells against oxidative stress. Mol Cell Endocrinol 2006; 252:148-53. [PMID: 16704895 DOI: 10.1016/j.mce.2006.03.029] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Activity-dependent neuroprotective protein (ADNP) is essential for brain formation. Here, we investigated the potential neuroprotective effects of recombinant ADNP under stress conditions. The human ADNP cDNA was sub-cloned into a vector that contains VP22, a Herpes virus protein that may allow penetration of fused proteins through cellular membranes. When incubated with pheochromocytoma (PC12) cells, a neuronal model, VP22-ADNP was associated with the cells after a 25-min incubation period. Pre-incubation with VP22-ADNP enriched protein fractions protected against beta amyloid peptide toxicity and oxidative stress (H2O2) in PC12 cells. VP22 by itself was devoid of protective activity. Furthermore, the pro-apoptotic protein p53 increased by 3.5-fold from control levels in the presence of H2O2, while treatment with VP22-ADNP prior to H2O2 exposure significantly reduced the p53 protein levels. ADNP expression was previously shown to oscillate as a function of the estrus cycle in the mouse arcuate nucleus, these oscillations are now correlated with increased cellular protection.
Collapse
Affiliation(s)
- R A Steingart
- Department of Clinical Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | | |
Collapse
|
25
|
Sari Y, Gozes I. Brain deficits associated with fetal alcohol exposure may be protected, in part, by peptides derived from activity-dependent neurotrophic factor and activity-dependent neuroprotective protein. ACTA ACUST UNITED AC 2006; 52:107-18. [PMID: 16488478 DOI: 10.1016/j.brainresrev.2006.01.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2005] [Revised: 12/20/2005] [Accepted: 01/13/2006] [Indexed: 11/26/2022]
Abstract
This review discusses the effects of prenatal alcohol exposure on the developing brain and the potential use of derived peptides from activity-dependent neurotrophic factor (ADNF) and activity-dependent neuroprotective protein (ADNP) in neuroprotection against the insults of alcohol. Alcohol is known to impede the growth of the central nervous system and to induce neurodegeneration through cellular apoptosis. Sari et al. have shown that prenatal alcohol exposure reduced the fetal brain weight, the size of the brain regions and the number of serotonin (5-HT) neurons. Prenatal alcohol exposure compromises neural tube midline development. Sari et al. further suggested that the timing of alcohol exposure during pregnancy is critical to the induction of deficits in 5-HT neurons, as well as other types of neurons and consequently results in deficits in neural tube development. ADNF and ADNP are glial-derived proteins discovered to be induced by vasoactive intestinal peptide (VIP). These proteins are expressed during embryonic development. Functional assays and genetic manipulations have identified these proteins as highly important for neural tube closure and brain formation/development. The peptide derivatives of ADNF, ADNF-14 (VLGGGSALLRSIPA), ADNF-9 (or SALLRSIPA = SAL) and of ADNP, NAPVSIPQ = NAP have shown neuroprotective effects and have been proven to prevent brain damage associated with prenatal alcohol exposure in animals. Here, we discuss the many aspects of alcohol-associated growth restriction in the developing brain and the potential inhibition of this severe phenotype through the use of neuroprotective peptides.
Collapse
Affiliation(s)
- Youssef Sari
- Indiana University School of Medicine, Department of Anatomy and Cell Biology, Neuroscience Programs, 635 Barnhill Drive, MS5035, Indianapolis, IN 46202, USA.
| | | |
Collapse
|
26
|
Zusev M, Gozes I. Differential regulation of activity-dependent neuroprotective protein in rat astrocytes by VIP and PACAP. ACTA ACUST UNITED AC 2004; 123:33-41. [PMID: 15518891 DOI: 10.1016/j.regpep.2004.05.021] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Activity-dependent neuroprotective protein (ADNP) was shown to be a vasoactive intestinal peptide (VIP) responsive gene in astrocytes derived from the cerebral cortex of newborn rats. The present study was set out to identify VIP receptors that are associated with increases in ADNP expression in developing astrocytes. Using VIP analogues specific for the VPAC1 and the VPAC2 receptors, it was discovered that VIP induced changes in ADNP expression in astrocytes via the VPAC2 receptor. The constitutive synthesis of ADNP and VPAC2 was shown to be age-dependent and increased as the astrocyte culture developed. Pituitary adenylate cyclase-activating polypeptide (PACAP) also induced changes in ADNP expression. The apparent changes induced by VIP and PACAP on ADNP expression were developmentally dependent, and while stimulating expression in young astrocytes, an inhibition was demonstrated in older cultures. In conclusion, VIP, PACAP and the VPAC2 receptor may all contribute to the regulation of ADNP gene expression in the developing astrocyte.
Collapse
MESH Headings
- Animals
- Astrocytes/cytology
- Astrocytes/drug effects
- Astrocytes/metabolism
- Base Sequence
- Cell Differentiation
- Cells, Cultured
- Cellular Senescence
- Gene Expression Regulation, Developmental/drug effects
- Homeodomain Proteins/biosynthesis
- Homeodomain Proteins/genetics
- Models, Biological
- Nerve Growth Factors/pharmacology
- Nerve Tissue Proteins/biosynthesis
- Nerve Tissue Proteins/genetics
- Neuropeptides/pharmacology
- Neurotransmitter Agents/pharmacology
- Pituitary Adenylate Cyclase-Activating Polypeptide
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rats
- Receptors, Cell Surface/genetics
- Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide
- Receptors, Vasoactive Intestinal Peptide/genetics
- Receptors, Vasoactive Intestinal Peptide, Type II
- Receptors, Vasoactive Intestinal Polypeptide, Type I
- Vasoactive Intestinal Peptide/pharmacology
Collapse
Affiliation(s)
- Margalit Zusev
- Department of Clinical Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | | |
Collapse
|
27
|
Gozes I, Furman S. Clinical endocrinology and metabolism. Potential clinical applications of vasoactive intestinal peptide: a selected update. Best Pract Res Clin Endocrinol Metab 2004; 18:623-40. [PMID: 15533779 DOI: 10.1016/j.beem.2004.08.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Neuropeptides are expressed in neurons innervating endocrine cells or in endocrine cells and cancer cells, and are released on site to act as hormones and growth factors. Vasoactive intestinal peptide (VIP) was first discovered in the early 1970s and has since become the area of research for many laboratories. VIP has a neuroendocrine role as it is intimately involved with the synthesis, secretion and action of other neuroendocrine hormones as well as cytokines and chemokines. Major outcomes of VIP downregulation encompass developmental and behavioral dysfunctions, including impaired diurnal rhythms. Overexpression of VIP has been associated with diarrhea and cancer, and overexpression of VIP receptors is associated with cancerous growth. This short review outlines some of the recent progress made in VIP research.
Collapse
Affiliation(s)
- Illana Gozes
- Department of Clinical Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
| | | |
Collapse
|
28
|
Takuma K, Baba A, Matsuda T. Astrocyte apoptosis: implications for neuroprotection. Prog Neurobiol 2004; 72:111-27. [PMID: 15063528 DOI: 10.1016/j.pneurobio.2004.02.001] [Citation(s) in RCA: 350] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2003] [Accepted: 02/04/2004] [Indexed: 12/21/2022]
Abstract
Astrocytes, the most abundant glial cell types in the brain, provide metabolic and trophic support to neurons and modulate synaptic activity. Accordingly, impairment in these astrocyte functions can critically influence neuronal survival. Recent studies show that astrocyte apoptosis may contribute to pathogenesis of many acute and chronic neurodegenerative disorders, such as cerebral ischemia, Alzheimer's disease and Parkinson's disease. We found that incubation of cultured rat astrocytes in a Ca(2+)-containing medium after exposure to a Ca(2+)-free medium causes an increase in intracellular Ca(2+) concentration followed by apoptosis, and that NF-kappa B, reactive oxygen species, and enzymes such as calpain, xanthine oxidase, calcineurin and caspase-3 are involved in reperfusion-induced apoptosis. Furthermore, we demonstrated that heat shock protein, mitogen-activated protein/extracellular signal-regulated kinase, phosphatidylinositol-3 kinase and cyclic GMP phosphodiesterase are target molecules for anti-apoptotic drugs. This review summarizes (1) astrocytic functions in neuroprotection, (2) current evidence of astrocyte apoptosis in both in vitro and in vivo studies including its molecular pathways such as Ca(2+) overload, oxidative stress, NF-kappa B activation, mitochondrial dysfunction, endoplasmic reticulum stress, and protease activation, and (3) several drugs preventing astrocyte apoptosis. As a whole, this article provides new insights into the potential role of astrocytes as targets for neuroprotection. In addition, the advance in the knowledge of molecular mechanisms of astrocyte apoptosis may lead to the development of novel therapeutic strategies for neurodegenerative disorders.
Collapse
Affiliation(s)
- Kazuhiro Takuma
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences and High Technology Research Center, Kobe Gakuin University, Kobe 651-2180, Japan
| | | | | |
Collapse
|
29
|
Pinhasov A, Mandel S, Torchinsky A, Giladi E, Pittel Z, Goldsweig AM, Servoss SJ, Brenneman DE, Gozes I. Activity-dependent neuroprotective protein: a novel gene essential for brain formation. BRAIN RESEARCH. DEVELOPMENTAL BRAIN RESEARCH 2003; 144:83-90. [PMID: 12888219 DOI: 10.1016/s0165-3806(03)00162-7] [Citation(s) in RCA: 175] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We have recently cloned the novel homeobox-containing activity-dependent neuroprotective protein (ADNP). In the current study, mouse ADNP was shown to be expressed at the time of neural tube closure, detected at E7.5 and increased on E9.5. Expression was augmented in the brain (E12.5), sustained throughout embryogenesis and regulated by VIP. To assess the function of ADNP, knockout mice were established. Detailed analysis revealed cranial neural tube closure failure and death on E8.5-9.0 of the ADNP-knockout embryos. The expression of Oct4, a gene associated with germ-line maintenance was markedly augmented in the knockout embryos. In contrast, the expression of Pax6, a gene crucial for cerebral cortex formation, was abolished in the brain primordial tissue of the knockout embryos. Thus, Pax6 and Oct4 constitute a part of the mechanism of action of ADNP on brain formation, inhibiting germ-line division while activating morphogenesis. In conclusion, ADNP is identified here as a new key gene essential for organogenesis in the developing embryo and may be implicated as a clinical target associated with proper neurodevelopment.
Collapse
MESH Headings
- Animals
- Blotting, Northern/methods
- Blotting, Western/methods
- Brain/embryology
- Brain/metabolism
- Cloning, Molecular
- DNA-Binding Proteins/metabolism
- Embryo, Mammalian
- Embryonic and Fetal Development
- Eye Proteins
- Gene Expression Regulation, Developmental
- Gestational Age
- Homeodomain Proteins/metabolism
- In Situ Hybridization/methods
- Mice
- Mice, Inbred C57BL
- Mice, Knockout/embryology
- Mice, Knockout/genetics
- Mice, Knockout/metabolism
- Molecular Sequence Data
- Nerve Tissue Proteins/genetics
- Nerve Tissue Proteins/metabolism
- Nerve Tissue Proteins/physiology
- Octamer Transcription Factor-3
- Organ Culture Techniques/methods
- PAX6 Transcription Factor
- Paired Box Transcription Factors
- RNA, Messenger/biosynthesis
- RNA, Messenger/drug effects
- Repressor Proteins
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Time Factors
- Transcription Factors
- Vasoactive Intestinal Peptide/pharmacology
Collapse
Affiliation(s)
- Albert Pinhasov
- Department of Clinical Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Gozes I, Alcalay R, Giladi E, Pinhasov A, Furman S, Brenneman DE. NAP accelerates the performance of normal rats in the water maze. J Mol Neurosci 2002; 19:167-70. [PMID: 12212775 DOI: 10.1007/s12031-002-0028-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
NAP (Asn-Ala-Pro-Val-Ser-Ile-Pro-Gln) has neuroprotective, memory enhancing, and neurotrophic properties. NAP is a short peptide sequence derived from the recently cloned, activity-dependent neuroprotective protein. The current study was designed to evaluate NAP activity in normal middle-aged animals to further assess NAP's breadth of neuroprotection. NAP was administered by inhalation. Results showed that in the paradigm of the Morris water maze, assessing short-term memory, only the NAP-treated middle-aged rats and not placebo-treated rats showed significant improvements by the end of the testing period. These results suggest efficacy for NAP in normal aging that is associated with accumulating environmental and genetic toxic factors.
Collapse
Affiliation(s)
- Illana Gozes
- Department of Clinical Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Israel.
| | | | | | | | | | | |
Collapse
|