Predictive Value of Parkinsonian Primates in Pharmacological Studies, a Comparison Between the Macaque, Marmoset and Squirrel Monkey I
Total Page:16
File Type:pdf, Size:1020Kb
JPET Fast Forward. Published on March 9, 2018 as DOI: 10.1124/jpet.117.247171 This article has not been copyedited and formatted. The final version may differ from this version. JPET #247171 Title: Predictive value of parkinsonian primates in pharmacological studies, a comparison between the macaque, marmoset and squirrel monkey i Authors: Nicolas Veyres, Adjia Hamadjida, Philippe Huot Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montreal, QC, Canada NV Montreal Neurological Institute, Montreal, QC, Canada HA,PH Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada PH Downloaded from jpet.aspetjournals.org at ASPET Journals on September 25, 2021 1 JPET Fast Forward. Published on March 9, 2018 as DOI: 10.1124/jpet.117.247171 This article has not been copyedited and formatted. The final version may differ from this version. JPET #247171 Running title: Predictive value of parkinsonian primates in drug research Text pages: 11 Word count abstract: 253 Word count introduction: 290 Word count discussion: 534 Word count manuscript: 2808 Number of figures: 9 Number of tables: 4 Number of references: 364 Number of supplementary tables: 3 Number of supplementary references: 231 Downloaded from Corresponding Author: Philippe Huot: Montreal Neurological Institute, 3801 University St, BT 209, Montreal, QC, Canada, H3A 2B4, Tel: +1-514-398-5957; Fax: +1-514-398-6644; Email: [email protected] List of non-standard abbreviations jpet.aspetjournals.org AADC: L-aromatic amino acid decarboxylase L-DOPA: L-3,4-dihydroxyphenylalanine MPTP: 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine Financial disclosure: There are no conflicts of interest. at ASPET Journals on September 25, 2021 2 JPET Fast Forward. Published on March 9, 2018 as DOI: 10.1124/jpet.117.247171 This article has not been copyedited and formatted. The final version may differ from this version. JPET #247171 Abstract The 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned primate is the gold- standard animal model of Parkinson’s disease (PD) and has been used to assess the effectiveness of experimental drugs on dyskinesia, parkinsonism and psychosis. Three species have been used in the majority of studies, the macaque, marmoset and squirrel monkey, the latter much less so than the first 2 species. However, the predictive value of each species at forecasting clinical efficacy, or lack thereof, is poorly documented. Here, we have reviewed all the published literature detailing Downloaded from pharmacological studies that assessed the effects of experimental drugs on dyskinesia, parkinsonism and psychosis in each of these species and have calculated their predictive value of jpet.aspetjournals.org success and failure at the clinical level. We found that, for dyskinesia, the macaque has a positive predictive value of 87.5% and a false positive rate of 38.1%, while the marmoset has a positive predictive value of 76.9% and a false positive rate of 15.6%. For parkinsonism, the macaque has a at ASPET Journals on September 25, 2021 positive predictive value of 68.2% and a false positive rate of 44.4%, while the marmoset has a positive predictive value of 86.9% and a false positive rate of 41.7%. No drug that alleviates psychosis in the clinic has shown efficacy at doing so in the macaque, while the marmoset has 100% positive predictive value. The small number of studies conducted in the squirrel monkey precluded us from calculating its predictive efficacy. We hope that our results will help in the design of pharmacological experiments and will facilitate the drug discovery and development process in PD. 3 JPET Fast Forward. Published on March 9, 2018 as DOI: 10.1124/jpet.117.247171 This article has not been copyedited and formatted. The final version may differ from this version. JPET #247171 Introduction Since its accidental discovery (Davis et al., 1979; Langston et al., 1983), 1-methyl-4- phenyl-1,2,3,6-tetrahydropyridine (MPTP) has been used extensively to model Parkinson’s disease (PD) in a breadth of non-human primates, enabling the investigation of anatomical (Jan et al., 2000; Zeng et al., 2008), behavioural (Pessiglione et al., 2004a; Pessiglione et al., 2004b), neuro-chemical (Soghomonian et al., 1994; Huot et al., 2008), etc. aspects of the disease. The MPTP-lesioned primate has also been invaluable in the search of effective anti-dyskinetic and anti-parkinsonian Downloaded from agents. A review article previously examined the translational predictive value of the MPTP- lesioned primate for the development of anti-dyskinetic drugs, but it was published over a decade jpet.aspetjournals.org ago (Fox et al., 2006a), and many drug have since then been tested both in the primate and in clinical settings. This previous review did not examine the translational predictive value of the MPTP-lesioned primate when it relates to the effect of drugs on parkinsonian disability or at ASPET Journals on September 25, 2021 dopaminergic psychosis, nor did it look at differences between different primate species when it comes to predict the clinical effectiveness of an experimental molecule. We have therefore conducted a thorough and unbiased review of the literature in order to compare the predictive effectiveness of different MPTP-lesioned primate species on the clinical effectiveness of potential anti-dyskinetic, anti-parkinsonian and anti-psychotic agents. We believe that this Review comes at a critical time, given that it has recently been suggested that some primate species might be more suited than other to conduct behavioural pharmacological research (Porras et al., 2012), and that there have been several failures of high- profile drugs in clinical trials (Cook et al., 2014; Bespalov et al., 2016), emphasising the need to use the best animal model possible in pre-clinical settings, to maximise chances of success when translating to the clinic. 4 JPET Fast Forward. Published on March 9, 2018 as DOI: 10.1124/jpet.117.247171 This article has not been copyedited and formatted. The final version may differ from this version. JPET #247171 Methods Three non-human primate species have been used in the majority of experiments to determine the anti-dyskinetic, anti-parkinsonian and anti-psychotic effect of experimental drugs: the macaque (both cynomolgus (Di Paolo et al., 1986) and rhesus (Burns et al., 1983), Macaca fascicularis and Macaca mulatta, respectively), common marmoset (Jenner et al., 1984) (Callithrix jacchus) and common squirrel monkey (Langston et al., 1984) (Saimiri sciureus). For each of these 3 primate species, we have reviewed all the studies that reported their effect, or lack thereof, on Downloaded from each of dyskinesia, parkinsonism and psychosis. We then sought which of these drugs tested in the non-human primate underwent clinical testing and compared their pre-clinical and clinical effects jpet.aspetjournals.org and calculated different predictive values (see “Endpoints” below). Inclusion criteria at ASPET Journals on September 25, 2021 The literature search spans from 1983, time at which the first MPTP-lesioned non-human primate was engineered (Burns et al., 1983), until 10th December 2017. Studies published after this date, either online or in print format, are not included. Only drugs whose pre-clinical and clinical efficacy, or lack thereof, was reported in peer- reviewed articles are included in this article. Results disseminated solely through abstracts or conference proceedings are therefore not reported in this article. We are aware that not all studies conducted on parkinsonian primates have been published, and that results of some clinical trials have not been disseminated through peer-reviewed journals; by choosing to include only studies and reports that were published in peer-reviewed journals, we may be introducing a selection bias in our analysis. For instance, whereas it has been studied in human (NCT00034814, NCT00108667), the clinical effectiveness of talampanel will not be discussed here, as the results of the clinical trials where it was assessed were not published in peer-reviewed scientific journals. 5 JPET Fast Forward. Published on March 9, 2018 as DOI: 10.1124/jpet.117.247171 This article has not been copyedited and formatted. The final version may differ from this version. JPET #247171 In addition, we have excluded L-3,4-dihydroxyphenylalanine (L-DOPA) and inhibitors of L- aromatic amino acid decarboxylase (AADC, e.g. benserazide (Rinne et al., 1975) and carbidopa (Marsden et al., 1973)) from our analysis, as these were used in almost all studies cited here, to reverse parkinsonism and induce dyskinesia. Research methodology Literature review was conducted primarily through the United States National Library of Downloaded from Medicine (NLM) database, accessed via PubMed. The search engine Google was used to complete the literature review and to access articles not indexed in the NLM database. The following terms jpet.aspetjournals.org were used to perform the literature search: abnormal involuntary movements, chorea, cynomolgus, dyskinesia, dyskinetic, dystonia, hallucinations, hyperactivity, hyperkinesia, L-DOPA, levodopa, macaque, marmoset, monkey, at ASPET Journals on September 25, 2021 MPTP, non-human primate, Parkinson’s disease, parkinsonian, parkinsonism, primate, psychosis, rhesus, squirrel monkey, visual hallucinations. Definition of “efficacy” Throughout our literature search, a reduction of dyskinesia/psychosis was considered such only if statistical significance was reached; trends were not considered. A drug was deemed to have anti-parkinsonian benefit if it alleviated parkinsonism as monotherapy or as adjunct to L-DOPA. Impulse-control disorders (Weintraub et al., 2010) were not considered as a psychotic manifestation. Several studies, especially in the macaque, were performed that administered drugs, e.g. cabergoline, to reduce the development of dyskinesia and then conducted post-mortem experiments; we have included these studies in our analysis, even if their primary end-point was 6 JPET Fast Forward. Published on March 9, 2018 as DOI: 10.1124/jpet.117.247171 This article has not been copyedited and formatted.