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3. The safety and efficacy of phaco-sleeve irrigation-assisted hydrodissection during femtosecond laser-assisted cataract surgery

Author

Masuda Y, Iwaki H, Watanabe A, Takada A, Okamoto T, Oki K, Nakano T, and Tsuneoka H

Subjects
femtosecond laser-assisted cataract surgery, FLACS, irrigation dynamic pressure, hydrodissection-related complication, capsular block syndrome, low invasive cataract surgery, Ophthalmology, RE1-994
Abstract

Yoichiro Masuda,1 Hisaharu Iwaki,2 Akira Watanabe,3 Akiko Takada,3 Toshinori Okamoto,4 Kotaro Oki,5 Tadashi Nakano,3 Hiroshi Tsuneoka3 1Department of Ophthalmology, The Jikei University, Katsushika Medical Center, Tokyo, Japan; 2Iwaki Eye Clinic, Tokyo, Japan; 3Department of Ophthalmology, The Jikei University, School of Medicine, Tokyo, Japan; 4Nakamurabashi Eye Clinic, Tokyo, Japan; 5Oki Eye Surgery Center, Tokyo, Japan Abstract: Femtosecond laser-assisted cataract surgery (FLACS) changes the intraoperative environment due to the generation of intracapsular gas that induces a high intracapsular volume. Manual hydrodissection (mH) may induce high intracapsular pressure (ICP) and additional intracapsular volume, thereby leading to capsular block syndrome (CBS). Since the phaco-sleeve irrigation-assisted hydrodissection (iH) technique is used to initially groove and split the lens and remove the intracapsular gas, this can reduce the intracapsular volume while bypassing the intracapsular lens prior to the hydrodissection. As iH uses the phaco tip to intentionally vacuum the intraocular fluid for use in inducing the irrigation jet from the sleeve side holes, the ICP cannot surpass the set irrigation pressure, thereby avoiding CBS. Using this technique, we performed FLACS without CBS in 310 cataract eyes. Our findings suggest that the iH technique may be beneficial for patients by preventing CBS during FLACS. Keywords: FLACS, irrigation dynamic pressure, hydrodissection-related complication, capsular block syndrome, CBS, low invasive cataract surgery

Published
2018

4. Irrigation dynamic pressure-assisted hydrodissection during cataract surgery

Author

Masuda Y, Iwaki H, Kato N, Takahashi G, Oki K, and Tsuneoka H

Subjects
cataract surgery, hydrodissection, irrigation pressure, hydrodissection-related complication, capsular block syndrome, anterior hyaloid membrane tear, FLACS, Ophthalmology, RE1-994
Abstract

Yoichiro Masuda,1 Hisaharu Iwaki,2 Noriko Kato,1 Genichiro Takahashi,1 Kotaro Oki,3 Hiroshi Tsuneoka4 1Department of Ophthalmology, The Jikei University, Katsushika Medical Center, 2Iwaki Eye Clinic, 3Oki Eye Surgery Center, 4Department of Ophthalmology, The Jikei University, School of Medicine, Tokyo, Japan Abstract: The irrigation dynamic pressure-assisted hydrodissection technique (irrigation-hydro [iH]) does not require performing manual hydrodissection using a syringe and cannula to achieve cortical-capsular cleavage during cataract surgery. Since the iH technique uses the phaco tip to intentionally vacuum the intraocular fluid in order to induce the irrigation dynamic pressure for cortical-capsular cleavage, there is a reduction in the intraocular pressure (IOP) from the bottle-height-dependent hydrostatic pressure. Thus, since the peak irrigation pressure derived from the phaco tip sleeve will be limited by the height of the irrigation fluid bottle, this is advantageous in helping to avoid excessively high IOP during cortical-capsular hydrodissection. Using this technique, we were able to effectively perform phacoemulsification without complications in 607 of 609 cataract eyes. Our findings show that utilization of the iH technique would be of benefit to patients, as it prevents high-pressure hydrodissection-related complications, such as capsular block syndrome and tears in the anterior hyaloid membrane during cataract surgery. Keywords: cataract surgery, hydrodissection, irrigation pressure, hydrodissection-related complication, capsular block syndrome, anterior hyaloid membrane tear, FLACS

Published
2017

5. Use of the phaco tip technique for lens cleavage and removal during cataract surgery

Author

Masuda Y, Oki K, Iwaki H, Okamoto T, and Tsuneoka H

Subjects
cataract surgery, hydrodissection, capsular block syndrome, FLACS, Dewey tip, Ophthalmology, RE1-994
Abstract

Yoichiro Masuda,1 Kotaro Oki,2 Hisaharu Iwaki,3 Toshinori Okamoto,1 Hiroshi Tsuneoka4 1Department of Ophthalmology, Jikei University Katsushika Medical Center, 2Oki Eye Surgery Center, 3Iwaki Eye Clinic, 4Department of Ophthalmology, Jikei University School of Medicine, Tokyo, Japan Abstract: Use of the phaco tip technique for lens cleavage and removal does not require manual hydrodissection using a syringe and cannula, or cortical removal using an irrigation/aspiration tip. The phaco tip is the only surgical instrument required for this technique. Its advantages include maintaining a stable intraocular pressure during cortical cleaving hydrodissection and lens removal, which includes the cortex. Keywords: cataract surgery, hydrodissection, capsular block syndrome, FLACS, Dewey tip

Published
2016

6. Longitudinal clinical and biomarker characteristics of non-manifesting LRRK2 G2019S carriers in the PPMI cohort

Author

Simuni, T, Merchant, K, Brumm, MC, Cho, H, Caspell-Garcia, C, Coffey, CS, Chahine, LM, Alcalay, RN, Nudelman, K, Foroud, T, Mollenhauer, B, Siderowf, A, Tanner, C, Iwaki, H, Sherer, T, Marek, K, Seibyl, J, Coffey, C, Tosun-Turgut, D, Shaw, LM, Trojanowski, JQ, Singleton, A, Kieburtz, K, Toga, A, Galasko, D, Poewe, W, Poston, K, Bressman, S, Reimer, A, Arnedo, V, Clark, A, Frasier, M, Kopil, C, Chowdhury, S, Casaceli, C, Dorsey, R, Wilson, R, Mahes, S, Salerno, C, Ahrens, M, Brumm, M, Cho, HR, Fedler, J, LaFontant, D-E, Kurth, R, Crawford, K, Casalin, P, Malferrari, G, Weisz, MG, Orr-Urtreger, A, Trojanowski, J, Shaw, L, Montine, T, Baglieri, C, Christini, A, Russell, D, Dahodwala, N, Giladi, N, Factor, S, Hogarth, P, Standaert, D, Hauser, R, Jankovic, J, Saint-Hilaire, M, Richard, I, Shprecher, D, Fernandez, H, Brockmann, K, Rosenthal, L, Barone, P, Espayc, A, Rowe, D, Marder, K, Santiago, A, Hu, S-C, Isaacson, S, Corvol, J-C, Martinez, JR, Tolosa, E, Tai, Y, Politis, M, Smejdir, D, Rees, L, Williams, K, Kausar, F, Richardson, W, Willeke, D, Peacock, S, Sommerfeld, B, Freed, A, Wakeman, K, Blair, C, Guthrie, S, Harrell, L, Hunter, C, Thomas, C-A, James, R, Zimmerman, G, Brown, V, Mule, J, Hilt, E, Ribb, K, Ainscough, S, Wethington, M, Ranola, M, Santana, HM, Moreno, J, Raymond, D, Speketer, K, Carvajal, L, Carvalo, S, Croitoru, I, Garrido, A, Payne, LM, Viswanth, V, Severt, L, Facheris, M, Soares, H, Mintun, MA, Cedarbaum, J, Taylor, P, Biglan, K, Vandenbroucke, E, Sheikh, ZH, Bingol, B, Fischer, T, Sardi, P, Forrat, R, Reith, A, Egebjerg, J, Hillert, GA, Saba, B, Min, C, Umek, R, Mather, J, De Santi, S, Post, A, Boess, F, Taylor, K, Grachev, I, Avbersek, A, Muglia, P, Tauscher, J, and Michael J Fox Foundation

Abstract

We examined 2-year longitudinal change in clinical features and biomarkers in LRRK2 non-manifesting carriers (NMCs) versus healthy controls (HCs) enrolled in the Parkinson’s Progression Markers Initiative (PPMI). We analyzed 2-year longitudinal data from 176 LRRK2 G2019S NMCs and 185 HCs. All participants were assessed annually with comprehensive motor and non-motor scales, dopamine transporter (DAT) imaging, and biofluid biomarkers. The latter included cerebrospinal fluid (CSF) Abeta, total tau and phospho-tau; serum urate and neurofilament light chain (NfL); and urine bis(monoacylglycerol) phosphate (BMP). At baseline, LRRK2 G2019S NMCs had a mean (SD) age of 62 (7.7) years and were 56% female. 13% had DAT deficit (defined as

Published
2022

7. Evaluation of the effect of pregabalin on simulated driving ability using a driving simulator in healthy male volunteers

Author

Tujii T, Kyaw WT, Iwaki H, Nishikawa N, Nagai M, Kubo M, and Nomoto M

Subjects
Medicine (General), R5-920
Abstract

Tomoaki Tujii, Win Thiri Kyaw, Hirotaka Iwaki, Noriko Nishikawa, Masahiro Nagai, Madoka Kubo, Masahiro Nomoto Department of Neurology and Clinical Pharmacology, Ehime University Graduate School of Medicine, Tohon Ehime, Japan Abstract: Pregabalin, a novel agent for treating partial epilepsy and peripheral neuropathic and central pain, was studied for its effect on driving performance in healthy volunteers. Sixteen healthy male volunteers who drove regularly were enrolled in a double-blind, parallel-group, placebo-controlled study assessing the effect of pregabalin on driving performance. Subjects received an oral dose of pregabalin 75 mg or placebo, and a second dose 12 hours later. A driving simulator was used to test simple and complicated braking reaction time, and simple and complicated steering-wheel techniques before the first dose, and 1 hour and 3 hours after the second dose of pregabalin or placebo. The effect of training during the driving test on the driving performance of each group was also evaluated. There were no statistically significant differences in driving performance between the pregabalin and the placebo groups. However, the pregabalin group showed no significant improvement in steering-wheel skills with training, whereas the placebo group showed a significant (P

Published
2014

9. Finding genetically-supported drug targets for Parkinson’s disease using Mendelian randomization of the druggable genome

Author

Storm, Catherine S., Kia, Demis A., Almramhi, Mona M., Bandres-Ciga, Sara, Finan, Chris, Noyce, A. J., Kaiyrzhanov, R., Middlehurst, B., Tan, M., Houlden, H., Morris, H. R., Plun-Favreau, H., Holmans, P., Hardy, J., Trabzuni, D., Quinn, J., Bubb, V., Mok, K. Y., Kinghorn, K. J., Lewis, P., Schreglmann, S. R., Lovering, R., R'Bibo, L., Manzoni, C., Rizig, M., Ryten, M., Guelfi, S., Escott-Price, V., Chelban, V., Foltynie, T., Williams, N., Morrison, K. E., Clarke, C., Harvey, K., Jacobs, B. M., Brice, Alexis, Danjou, F., Lesage, S., Corvol, J. C., Martinez, M., Schulte, C., Brockmann, K., Simón-Sánchez, J., Heutink, P., Rizzu, P., Sharma, M., Gasser, T., Schneider, S. A., Cookson, M. R., Blauwendraat, C., Craig, D. W., Billingsley, K., Makarious, M. B., Narendra, D. P., Faghri, F., Gibbs, J. R., Hernandez, D. G., Van Keuren-Jensen, K., Shulman, J. M., Iwaki, H., Leonard, H. L., Nalls, M. A., Robak, L., Bras, J., Guerreiro, R., Lubbe, S., Troycoco, T., Finkbeiner, S., Mencacci, N. E., Lungu, C., Singleton, A. B., Scholz, S. W., Reed, X., Uitti, R. J., Ross, O. A., Grenn, F. P., Moore, A., Alcalay, R. N., Wszolek, Z. K., Gan-Or, Z., Rouleau, G. A., Krohn, L., Mufti, K., van Hilten, J. J., Marinus, J., Adarmes-Gómez, A. D., Aguilar Barberà, Miquel, Álvarez Angulo, Iñaki, Alvarez, V., Barrero, F. J., Yarza, J. A. B., Bernal-Bernal, I., Blázquez Estrada, M, Bonilla-Toribio, M., Botía, J. A., Boungiorno, M. T., Buiza-Rueda, Dolores, Cámara, A., Carrillo, F., Carrión-Claro, M., Cerdan, D., Clarimón, Jordi, Compta, Y., Diez-Fairen, M., Dols-Icardo, Oriol, Duarte, J., Duran, R., Escamilla-Sevilla, F., Ezquerra, M., Feliz, C., Fernández, M., Fernández-Santiago, R., Garcia, C., García-Ruiz, P., Gómez-Garre, P., Heredia, M. J. G., Gonzalez-Aramburu, I., Pagola, A. G., Hoenicka, J., Infante, J., Jesús, S., Jimenez-Escrig, A., Kulisevsky, Jaime, Labrador-Espinosa, M. A., Lopez-Sendon, J. L., de Munain Arregui, A. L., Macias, D., Torres, I. M., Marín, J., Marti, M. J., Martínez-Castrillo, J. C., Méndez-del-Barrio, C., González, M. M., Mata, M., Mínguez, A., Mir, P., Rezola, E. M., Muñoz, E., Pagonabarraga, J., Pastor, P., Errazquin, F. P., Periñán-Tocino, T., Ruiz-Martínez, J., Ruz, C., Rodriguez, A. S., Sierra, M., Suarez-Sanmartin, E., Tabernero, C., Tartari, J. P., Tejera-Parrado, C., Tolosa, E., Valldeoriola, F., Vargas-González, L., Vela, Lydia, Vives, F., Zimprich, A., Pihlstrom, L., Toft, M., Taba, P., Koks, S., Hassin-Baer, S., Majamaa, K., Siitonen, A., Tienari, P., Okubadejo, N. U., Ojo, O. O., Shashkin, C., Zharkinbekova, N., Akhmetzhanov, V., Kaishybayeva, G., Karimova, A., Khaibullin, T., Lynch, T. L., Hingorani, Aroon, Wood, Nicholas W.., Universitat Autònoma de Barcelona, Rosetrees Trust, John Black Charitable Foundation, University College London, King Abdulaziz University, National Institute for Health Research (UK), Universidad de Cantabria, HUS Neurocenter, Department of Neurosciences, and Clinicum

Subjects
Aging, Science, Quantitative Trait Loci, General Physics and Astronomy, Neurodegenerative, 3124 Neurology and psychiatry, General Biochemistry, Genetics and Molecular Biology, Article, Cohort Studies, Risk Factors, Genetics research, Genetics, 2.1 Biological and endogenous factors, Humans, Genetic Predisposition to Disease, Aetiology, Multidisciplinary, Genome, Parkinson's Disease, Genome, Human, Prevention, 3112 Neurosciences, Neurosciences, Brain, Genetic Variation, Parkinson Disease, General Chemistry, Mendelian Randomization Analysis, International Parkinson’s Disease Genomics Consortium, Brain Disorders, Good Health and Well Being, Gene Expression Regulation, Neurology, 5.1 Pharmaceuticals, Case-Control Studies, Neurological, Disease Progression, Development of treatments and therapeutic interventions, Human, Biotechnology
Abstract

Parkinson’s disease is a neurodegenerative movement disorder that currently has no disease-modifying treatment, partly owing to inefficiencies in drug target identification and validation. We use Mendelian randomization to investigate over 3,000 genes that encode druggable proteins and predict their efficacy as drug targets for Parkinson’s disease. We use expression and protein quantitative trait loci to mimic exposure to medications, and we examine the causal effect on Parkinson’s disease risk (in two large cohorts), age at onset and progression. We propose 23 drug-targeting mechanisms for Parkinson’s disease, including four possible drug repurposing opportunities and two drugs which may increase Parkinson’s disease risk. Of these, we put forward six drug targets with the strongest Mendelian randomization evidence. There is remarkably little overlap between our drug targets to reduce Parkinson’s disease risk versus progression, suggesting different molecular mechanisms. Drugs with genetic support are considerably more likely to succeed in clinical trials, and we provide compelling genetic evidence and an analysis pipeline to prioritise Parkinson’s disease drug development., There is currently no disease-modifying treatment for Parkinson’s disease, a common neurodegenerative disorder. Here, the authors use genetic variation associated with gene and protein expression to find putative drug targets for Parkinson’s disease using Mendelian randomization of the druggable genome.

Published
2021

11. Interface between Education and Communication: Japan. Asia and the Pacific Programme of Educational Innovation for Development. Education and Polity 4.

Author

United Nations Educational, Scientific, and Cultural Organization, Bangkok (Thailand). Regional Office for Education in Asia and the Pacific., Iwaki, H., and Hamano, Y.

Abstract

The first chapter of this overview of communications development and its use for instructional purposes in Japan reviews the history of mass communications in Japan, i.e., newspapers, movies, radio, and television, and notes the advent of new media. The second chapter describes the use of movies and radio in both social and formal classroom education, and discusses the influence of broadcast television on the intellectual and emotional development of children and the appearance of lifelong learning via television. Survey results are cited to provide information on the amount of time both children and adults spend viewing television, their attitudes toward the medium, the effects of television viewing on children's reading habits, the use of television programs in schools, and trends in television use for social education. The current situation of computer education in Japan is described in the final chapter, which details government policies and specific measures designed to bring the computer and broadcasting into various levels of formal education. Brief descriptions are provided of programs in elementary and secondary schools and in universities, as well as the use of computers to access information for research. Descriptions of the objectives and activities of two organizations which study the development of education and communication--the Centre for Educational Technology and the National Institute of Multi-Media Education (HKC)--conclude the chapter. Both a list of 19 references and a nine-item annotated bibliography are provided. (MES)

Published
1985

13. Investigation of autosomal genetic sex differences in Parkinson’s disease

Author

Blauwendraat, C. (Cornelis), Iwaki, H. (Hirotaka), Makarious, M. B. (Mary B.), Bandres-Ciga, S. (Sara), Leonard, H. L. (Hampton L.), Grenn, F. P. (Francis P.), Lake, J. (Julie), Krohn, L. (Lynne), Tan, M. (Manuela), Kim, J. J. (Jonggeol J.), Gibbs, J. R. (Jesse R.), Hernandez, D. G. (Dena G.), Ruskey, J. A. (Jennifer A.), Pihlstrom, L. (Lasse), Toft, M. (Mathias), van Hilten, J. J. (Jacobus J.), Marinus, J. (Johan), Schulte, C. (Claudia), Brockmann, K. (Kathrin), Sharma, M. (Manu), Siitonen, A. (Ari), Majamaa, K. (Kari), Eerola-Rautio, J. (Johanna), Tienari, P. J. (Pentti J.), Grosset, D. G. (Donald G.), Lesage, S. (Suzanne), Corvol, J.-C. (Jean-Christophe), Brice, A. (Alexis), Wood, N. (Nick), Hardy, J. (John), Gan-Or, Z. (Ziv), Heutink, P. (Peter), Gasser, T. (Thomas), Morris, H. R. (Huw R.), Noyce, A. J. (Alastair J.), Nalls, M. A. (Mike A.), and Singleton, A. B. (Andrew B.)

Abstract

Objective: Parkinson’s disease (PD) is a complex neurodegenerative disorder. Men are on average similar to 1.5 times more likely to develop PD compared to women with European ancestry. Over the years, genomewide association studies (GWAS) have identified numerous genetic risk factors for PD, however, it is unclear whether genetics contribute to disease etiology in a sex-specific manner. Methods: In an effort to study sex-specific genetic factors associated with PD, we explored 2 large genetic datasets from the International Parkinson’s Disease Genomics Consortium and the UK Biobank consisting of 13,020 male PD cases, 7,936 paternal proxy cases, 89,660 male controls, 7,947 female PD cases, 5,473 maternal proxy cases, and 90,662 female controls. We performed GWAS meta-analyses to identify distinct patterns of genetic risk contributing to disease in male versus female PD cases. Results: In total, 19 genomewide significant regions were identified and no sex-specific effects were observed. A high genetic correlation between the male and female PD GWAS were identified (rg = 0.877) and heritability estimates were identical between male and female PD cases (similar to 20%). Interpretation: We did not detect any significant genetic differences between male or female PD cases. Our study does not support the notion that common genetic variation on the autosomes could explain the difference in prevalence of PD between males and females cases at least when considering the current sample size under study. Further studies are warranted to investigate the genetic architecture of PD explained by X and Y chromosomes and further evaluate environmental effects that could potentially contribute to PD etiology in male versus female patients.

Published
2021

14. Investigation of Autosomal Genetic Sex Differences in Parkinson's Disease

Author

Blauwendraat, C, Iwaki, H, Makarious, MB, Bandres-Ciga, S, Leonard, HL, Grenn, FP, Lake, J, Krohn, L, Tan, M, Kim, JJ, Gibbs, JR, Hernandez, DG, Ruskey, JA, Pihlstrom, L, Toft, M, van Hilten, JJ, Marinus, J, Schulte, C, Brockmann, K, Sharma, M, Siitonen, A, Majamaa, K, Eerola-Rautio, J, Tienari, PJ, Grosset, DG, Lesage, S, Corvol, JC, Brice, A, Wood, N, Hardy, J, Gan-Or, Z, Heutink, P, Gasser, T, Morris, HR, Noyce, AJ, Nalls, MA, Singleton, AB, Clarimón J., Dols-Icardo, O, Kulisevsky J., Pagonabarraga, J, and Int Parkinsons Dis Genomics Consor

Abstract

Objective: Parkinson's disease (PD) is a complex neurodegenerative disorder. Men are on average similar to 1.5 times more likely to develop PD compared to women with European ancestry. Over the years, genomewide association studies (GWAS) have identified numerous genetic risk factors for PD, however, it is unclear whether genetics contribute to disease etiology in a sex-specific manner. Methods: In an effort to study sex-specific genetic factors associated with PD, we explored 2 large genetic datasets from the International Parkinson's Disease Genomics Consortium and the UK Biobank consisting of 13,020 male PD cases, 7,936 paternal proxy cases, 89,660 male controls, 7,947 female PD cases, 5,473 maternal proxy cases, and 90,662 female controls. We performed GWAS meta-analyses to identify distinct patterns of genetic risk contributing to disease in male versus female PD cases. Results: In total, 19 genomewide significant regions were identified and no sex-specific effects were observed. A high genetic correlation between the male and female PD GWAS were identified (rg = 0.877) and heritability estimates were identical between male and female PD cases (similar to 20%). Interpretation: We did not detect any significant genetic differences between male or female PD cases. Our study does not support the notion that common genetic variation on the autosomes could explain the difference in prevalence of PD between males and females cases at least when considering the current sample size under study. Further studies are warranted to investigate the genetic architecture of PD explained by X and Y chromosomes and further evaluate environmental effects that could potentially contribute to PD etiology in male versus female patients.

Published
2021

15. Investigation of Autosomal Genetic Sex Differences in Parkinson's Disease

Author

Leonard H, Lake J, Kim JJ, Gibbs JR, Ruskey JA, Pihlstrøm L, Eerola-Rautio J, Tienari PJ, Grosset DG, Wood N, Noyce AJ, Middlehurst B, Kia DA, Tan M, Houlden H, Storm CS, Morris HR, Plun-Favreau H, Holmans P, Hardy J, Trabzuni D, Quinn J, Bubb V, Mok KY, Kinghorn KJ, Wood NW, Lewis P, Schreglmann SR, Lovering R, R'Bibo L, Manzoni C, Rizig M, Ryten M, Guelfi S, Escott-Price V, Chelban V, Foltynie T, Williams N, Morrison KE, Clarke C, Harvey K, Jacobs BM, Brice A, Danjou F, Lesage S, Corvol JC, Martinez M, Schulte C, Brockmann K, Simón-Sánchez J, Heutink P, Rizzu P, Sharma M, Gasser T, Schneider SA, Cookson MR, Bandres-Ciga S, Blauwendraat C, Craig DW, Billingsley K, Makarious MB, Narendra DP, Faghri F, Hernandez DG, Van Keuren-Jensen K, Shulman JM, Iwaki H, Leonard HL, Nalls MA, Robak L, Bras J, Guerreiro R, Lubbe S, Troycoco T, Finkbeiner S, Mencacci NE, Lungu C, Singleton AB, Scholz SW, Reed X, Uitti RJ, Ross OA, Grenn FP, Moore A, Alcalay RN, Wszolek ZK, Gan-Or Z, Rouleau GA, Krohn L, Mufti K, van Hilten JJ, Marinus J, Adarmes-Gómez AD, Aguilar M, Alvarez I, Alvarez V, Barrero FJ, Yarza JAB, Bernal-Bernal I, Blazquez M, Bonilla-Toribio M, Botía JA, Boungiorno MT, Buiza-Rueda D, Cámara A, Carrillo F, Carrión-Claro M, Cerdan D, Clarimón J, Compta Y, Diez-Fairen M, Dols-Icardo O, Duarte J, Duran R, Escamilla-Sevilla F, Ezquerra M, Feliz C, Fernández M, Fernández-Santiago R, Garcia C, García-Ruiz P, Gómez-Garre P, Heredia MJG, Gonzalez-Aramburu I, Pagola AG, Hoenicka J, Infante J, Jesús S, Jimenez-Escrig A, Kulisevsky J, Labrador-Espinosa MA, Lopez-Sendon JL, de Munain Arregui AL, Macias D, Torres IM, Marín J, Marti MJ, Martínez-Castrillo JC, Méndez-Del-Barrio C, González MM, Mata M, Mínguez A, Mir P, Rezola EM, Muñoz E, Pagonabarraga J, Pastor P, Errazquin FP, Periñán-Tocino T, Ruiz-Martínez J, Ruz C, Rodriguez AS, Sierra M, Suarez-Sanmartin E, Tabernero C, Tartari JP, Tejera-Parrado C, Tolosa E, Valldeoriola F, Vargas-González L, Vela L, Vives F, Zimprich A, Pihlstrom L, Toft M, Taba P, Koks S, Hassin-Baer S, Majamaa K, Siitonen A, Tienari P, Okubadejo NU, Ojo OO, Kaiyrzhanov R, Shashkin C, Zharkinbekova N, Akhmetzhanov V, Kaishybayeva G, Karimova A, Khaibullin T, Lynch TL, and International Parkinson's Disease Genomics Consortium (IPDGC)

Abstract

OBJECTIVE: Parkinson's disease (PD) is a complex neurodegenerative disorder. Men are on average ~ 1.5 times more likely to develop PD compared to women with European ancestry. Over the years, genomewide association studies (GWAS) have identified numerous genetic risk factors for PD, however, it is unclear whether genetics contribute to disease etiology in a sex-specific manner. METHODS: In an effort to study sex-specific genetic factors associated with PD, we explored 2 large genetic datasets from the International Parkinson's Disease Genomics Consortium and the UK Biobank consisting of 13,020 male PD cases, 7,936 paternal proxy cases, 89,660 male controls, 7,947 female PD cases, 5,473 maternal proxy cases, and 90,662 female controls. We performed GWAS meta-analyses to identify distinct patterns of genetic risk contributing to disease in male versus female PD cases. RESULTS: In total, 19 genomewide significant regions were identified and no sex-specific effects were observed. A high genetic correlation between the male and female PD GWAS were identified (rg = 0.877) and heritability estimates were identical between male and female PD cases (~ 20%). INTERPRETATION: We did not detect any significant genetic differences between male or female PD cases. Our study does not support the notion that common genetic variation on the autosomes could explain the difference in prevalence of PD between males and females cases at least when considering the current sample size under study. Further studies are warranted to investigate the genetic architecture of PD explained by X and Y chromosomes and further evaluate environmental effects that could potentially contribute to PD etiology in male versus female patients. ANN NEUROL 2021;90:41-48.

Published
2021

16. Differences in the Presentation and Progression of Parkinson's Disease by Sex

Author

Iwaki, H., Blauwendraat, C., Leonard, H.L., Makarious, M.B., Kim, J.J., Liu, G., Maple-Grødem, J., Corvol, J.C., Pihlstrøm, L., Nimwegen, M.L. van, Smolensky, L., Amondikar, N., Hutten, S.J., Frasier, M., Nguyen, K.H., Rick, J., Eberly, S., Faghri, F., Auinger, P., Scott, K.M., Wijeyekoon, R., Deerlin, V.M. Van, Hernandez, D.G., Gibbs, R.J., Day-Williams, A.G., Brice, A., Alves, G., Noyce, A.J., Tysnes, O.B., Evans, J.R., Breen, D.P., Estrada, K., Wegel, C.E., Danjou, F., Simon, D.K., Andreassen, O.A., Ravina, B., Toft, M., Heutink, P., Bloem, B.R., Weintraub, D., Barker, R.A., Williams-Gray, C.H., Warrenburg, B.P.C. van de, Hilten, J.J. van, Scherzer, C.R., Singleton, A.B., Nalls, M.A., Iwaki, H., Blauwendraat, C., Leonard, H.L., Makarious, M.B., Kim, J.J., Liu, G., Maple-Grødem, J., Corvol, J.C., Pihlstrøm, L., Nimwegen, M.L. van, Smolensky, L., Amondikar, N., Hutten, S.J., Frasier, M., Nguyen, K.H., Rick, J., Eberly, S., Faghri, F., Auinger, P., Scott, K.M., Wijeyekoon, R., Deerlin, V.M. Van, Hernandez, D.G., Gibbs, R.J., Day-Williams, A.G., Brice, A., Alves, G., Noyce, A.J., Tysnes, O.B., Evans, J.R., Breen, D.P., Estrada, K., Wegel, C.E., Danjou, F., Simon, D.K., Andreassen, O.A., Ravina, B., Toft, M., Heutink, P., Bloem, B.R., Weintraub, D., Barker, R.A., Williams-Gray, C.H., Warrenburg, B.P.C. van de, Hilten, J.J. van, Scherzer, C.R., Singleton, A.B., and Nalls, M.A.

Abstract

Item does not contain fulltext, BACKGROUND: Previous studies reported various symptoms of Parkinson's disease (PD) associated with sex. Some were conflicting or confirmed in only one study. OBJECTIVES: We examined sex associations to PD phenotypes cross-sectionally and longitudinally in large-scale data. METHODS: We tested 40 clinical phenotypes, using longitudinal, clinic-based patient cohorts, consisting of 5946 patients, with a median follow-up of 3.1 years. For continuous outcomes, we used linear regressions at baseline to test sex-associated differences in presentation, and linear mixed-effects models to test sex-associated differences in progression. For binomial outcomes, we used logistic regression models at baseline and Cox regression models for survival analyses. We adjusted for age, disease duration, and medication use. In the secondary analyses, data from 17 719 PD patients and 7588 non-PD participants from an online-only, self-assessment PD cohort were cross-sectionally evaluated to determine whether the sex-associated differences identified in the primary analyses were consistent and unique to PD. RESULTS: Female PD patients had a higher risk of developing dyskinesia early during the follow-up period, with a slower progression in activities of daily living difficulties, and a lower risk of developing cognitive impairments compared with male patients. The findings in the longitudinal, clinic-based cohorts were mostly consistent with the results of the online-only cohort. CONCLUSIONS: We observed sex-associated contributions to PD heterogeneity. These results highlight the necessity of future research to determine the underlying mechanisms and importance of personalized clinical management. © 2020 International Parkinson and Movement Disorder Society.

Published
2021

17. Finding genetically-supported drug targets for Parkinson’s disease using Mendelian randomization of the druggable genome

Author

Storm, C.S., Kia, D.A., Almramhi, M.M., Bandrés-Ciga, S., Finan, C., Noyce, A.J., Kaiyrzhanov, R., Middlehurst, B., Tan, M., Houlden, H., Morris, H.R., Plun-Favreau, H., Holmans, P., Hardy, J., Trabzuni, D., Quinn, J., Bubb, V., Mok, K.Y., Kinghorn, K.J., Lewis, P., Schreglmann, S.R., Lovering, R., R’Bibo, L., Manzoni, C., Rizig, M., Ryten, M., Guelfi, S., Escott-Price, V., Chelban, V., Foltynie, T., Williams, N., Morrison, K.E., Clarke, C., Harvey, K., Jacobs, B.M., Brice, A., Danjou, F., Lesage, S., Corvol, J-C, Martinez, M., Schulte, C., Brockmann, K., Simón-Sánchez, J., Heutink, P., Rizzu, P., Sharma, M., Gasser, T., Schneider, S.A., Cookson, M.R., Blauwendraat, C., Craig, D.W., Billingsley, K., Makarious, M.B., Narendra, D.P., Faghri, F., Gibbs, J.R., Hernandez, D.G., Van Keuren-Jensen, K., Shulman, J.M., Iwaki, H., Leonard, H.L., Nalls, M.A., Robak, L., Bras, J., Guerreiro, R., Lubbe, S., Troycoco, T., Finkbeiner, S., Mencacci, N.E., Lungu, C., Singleton, A.B., Scholz, S.W., Reed, X., Uitti, R.J., Ross, O.A., Grenn, F.P., Moore, A., Alcalay, R.N., Wszolek, Z.K., Gan-Or, Z., Rouleau, G.A., Krohn, L., Mufti, K., van Hilten, J.J., Marinus, J., Adarmes-Gómez, A.D., Aguilar, M., Alvarez, I., Alvarez, V., Barrero, F.J., Yarza, J.A.B., Bernal-Bernal, I., Blazquez, M., Bonilla-Toribio, M., Botía, J.A., Boungiorno, M.T., Buiza-Rueda, D., Cámara, A., Carrillo, F., Carrión-Claro, M., Cerdan, D., Clarimón, J., Compta, Y., Diez-Fairen, M., Dols-Icardo, O., Duarte, J., Duran, R., Escamilla-Sevilla, F., Ezquerra, M., Feliz, C., Fernández, M., Fernández-Santiago, R., Garcia, C., García-Ruiz, P., Gómez-Garre, P., Heredia, M.J.G., Gonzalez-Aramburu, I., Pagola, A.G., Hoenicka, J., Infante, J., Jesús, S., Jimenez-Escrig, A., Kulisevsky, J., Labrador-Espinosa, M.A., Lopez-Sendon, J.L., de Munain Arregui, A.L., Macias, D., Torres, I.M., Marín, J., Marti, M.J., Martínez-Castrillo, J.C., Méndez-del-Barrio, C., González, M.M., Mata, M., Mínguez, A., Mir, P., Rezola, E.M., Muñoz, E., Pagonabarraga, J., Pastor, P., Errazquin, F.P., Periñán-Tocino, T., Ruiz-Martínez, J., Ruz, C., Rodriguez, A.S., Sierra, M., Suarez-Sanmartin, E., Tabernero, C., Tartari, J.P., Tejera-Parrado, C., Tolosa, E., Valldeoriola, F., Vargas-González, L., Vela, L., Vives, F., Zimprich, A., Pihlstrom, L., Toft, M., Taba, P., Kõks, S., Hassin-Baer, S., Majamaa, K., Siitonen, A., Tienari, P., Okubadejo, N.U., Ojo, O.O., Shashkin, C., Zharkinbekova, N., Akhmetzhanov, V., Kaishybayeva, G., Karimova, A., Khaibullin, T., Lynch, T.L., Hingorani, A.D., Wood, N.W., Storm, C.S., Kia, D.A., Almramhi, M.M., Bandrés-Ciga, S., Finan, C., Noyce, A.J., Kaiyrzhanov, R., Middlehurst, B., Tan, M., Houlden, H., Morris, H.R., Plun-Favreau, H., Holmans, P., Hardy, J., Trabzuni, D., Quinn, J., Bubb, V., Mok, K.Y., Kinghorn, K.J., Lewis, P., Schreglmann, S.R., Lovering, R., R’Bibo, L., Manzoni, C., Rizig, M., Ryten, M., Guelfi, S., Escott-Price, V., Chelban, V., Foltynie, T., Williams, N., Morrison, K.E., Clarke, C., Harvey, K., Jacobs, B.M., Brice, A., Danjou, F., Lesage, S., Corvol, J-C, Martinez, M., Schulte, C., Brockmann, K., Simón-Sánchez, J., Heutink, P., Rizzu, P., Sharma, M., Gasser, T., Schneider, S.A., Cookson, M.R., Blauwendraat, C., Craig, D.W., Billingsley, K., Makarious, M.B., Narendra, D.P., Faghri, F., Gibbs, J.R., Hernandez, D.G., Van Keuren-Jensen, K., Shulman, J.M., Iwaki, H., Leonard, H.L., Nalls, M.A., Robak, L., Bras, J., Guerreiro, R., Lubbe, S., Troycoco, T., Finkbeiner, S., Mencacci, N.E., Lungu, C., Singleton, A.B., Scholz, S.W., Reed, X., Uitti, R.J., Ross, O.A., Grenn, F.P., Moore, A., Alcalay, R.N., Wszolek, Z.K., Gan-Or, Z., Rouleau, G.A., Krohn, L., Mufti, K., van Hilten, J.J., Marinus, J., Adarmes-Gómez, A.D., Aguilar, M., Alvarez, I., Alvarez, V., Barrero, F.J., Yarza, J.A.B., Bernal-Bernal, I., Blazquez, M., Bonilla-Toribio, M., Botía, J.A., Boungiorno, M.T., Buiza-Rueda, D., Cámara, A., Carrillo, F., Carrión-Claro, M., Cerdan, D., Clarimón, J., Compta, Y., Diez-Fairen, M., Dols-Icardo, O., Duarte, J., Duran, R., Escamilla-Sevilla, F., Ezquerra, M., Feliz, C., Fernández, M., Fernández-Santiago, R., Garcia, C., García-Ruiz, P., Gómez-Garre, P., Heredia, M.J.G., Gonzalez-Aramburu, I., Pagola, A.G., Hoenicka, J., Infante, J., Jesús, S., Jimenez-Escrig, A., Kulisevsky, J., Labrador-Espinosa, M.A., Lopez-Sendon, J.L., de Munain Arregui, A.L., Macias, D., Torres, I.M., Marín, J., Marti, M.J., Martínez-Castrillo, J.C., Méndez-del-Barrio, C., González, M.M., Mata, M., Mínguez, A., Mir, P., Rezola, E.M., Muñoz, E., Pagonabarraga, J., Pastor, P., Errazquin, F.P., Periñán-Tocino, T., Ruiz-Martínez, J., Ruz, C., Rodriguez, A.S., Sierra, M., Suarez-Sanmartin, E., Tabernero, C., Tartari, J.P., Tejera-Parrado, C., Tolosa, E., Valldeoriola, F., Vargas-González, L., Vela, L., Vives, F., Zimprich, A., Pihlstrom, L., Toft, M., Taba, P., Kõks, S., Hassin-Baer, S., Majamaa, K., Siitonen, A., Tienari, P., Okubadejo, N.U., Ojo, O.O., Shashkin, C., Zharkinbekova, N., Akhmetzhanov, V., Kaishybayeva, G., Karimova, A., Khaibullin, T., Lynch, T.L., Hingorani, A.D., and Wood, N.W.

Abstract

Parkinson’s disease is a neurodegenerative movement disorder that currently has no disease-modifying treatment, partly owing to inefficiencies in drug target identification and validation. We use Mendelian randomization to investigate over 3,000 genes that encode druggable proteins and predict their efficacy as drug targets for Parkinson’s disease. We use expression and protein quantitative trait loci to mimic exposure to medications, and we examine the causal effect on Parkinson’s disease risk (in two large cohorts), age at onset and progression. We propose 23 drug-targeting mechanisms for Parkinson’s disease, including four possible drug repurposing opportunities and two drugs which may increase Parkinson’s disease risk. Of these, we put forward six drug targets with the strongest Mendelian randomization evidence. There is remarkably little overlap between our drug targets to reduce Parkinson’s disease risk versus progression, suggesting different molecular mechanisms. Drugs with genetic support are considerably more likely to succeed in clinical trials, and we provide compelling genetic evidence and an analysis pipeline to prioritise Parkinson’s disease drug development.

Published
2021

20. Correction to: Large‑scale pathway specific polygenic risk and transcriptomic community network analysis identifies novel functional pathways in Parkinson disease

Author

Bandres-Ciga, S., Saez-Atienzar, S., Kim, J. J., Makarious, M. B., Faghri, F., Diez-Fairen, M., Iwaki, H., Leonard, H., Botia, J., Ryten, M., Hernandez, D., Gibbs, J. R., Ding, J., Gan-Or, Z., Noyce, A., Pihlstrom, L., Torkamani, A., Soltis, A. R., Dalgard, C. L., Scholz, S. W., Traynor, B. J., Ehrlich, D., Scherzer, C. R., Bookman, M., Cookson, M., Blauwendraat, C., Nalls, M. A., and Singleton, A. B.

Subjects
Multifactorial Inheritance, Cellular and Molecular Neuroscience, Dopaminergic Neurons, Gene Expression Profiling, Correction, Humans, Genetic Predisposition to Disease, Parkinson Disease, Neurology (clinical), Lysosomes, Community Networks, Mitochondria, Pathology and Forensic Medicine
Abstract

Polygenic inheritance plays a central role in Parkinson disease (PD). A priority in elucidating PD etiology lies in defining the biological basis of genetic risk. Unraveling how risk leads to disruption will yield disease-modifying therapeutic targets that may be effective. Here, we utilized a high-throughput and hypothesis-free approach to determine biological processes underlying PD using the largest currently available cohorts of genetic and gene expression data from International Parkinson's Disease Genetics Consortium (IPDGC) and the Accelerating Medicines Partnership-Parkinson's disease initiative (AMP-PD), among other sources. We applied large-scale gene-set specific polygenic risk score (PRS) analyses to assess the role of common variation on PD risk focusing on publicly annotated gene sets representative of curated pathways. We nominated specific molecular sub-processes underlying protein misfolding and aggregation, post-translational protein modification, immune response, membrane and intracellular trafficking, lipid and vitamin metabolism, synaptic transmission, endosomal-lysosomal dysfunction, chromatin remodeling and apoptosis mediated by caspases among the main contributors to PD etiology. We assessed the impact of rare variation on PD risk in an independent cohort of whole-genome sequencing data and found evidence for a burden of rare damaging alleles in a range of processes, including neuronal transmission-related pathways and immune response. We explored enrichment linked to expression cell specificity patterns using single-cell gene expression data and demonstrated a significant risk pattern for dopaminergic neurons, serotonergic neurons, hypothalamic GABAergic neurons, and neural progenitors. Subsequently, we created a novel way of building de novo pathways by constructing a network expression community map using transcriptomic data derived from the blood of PD patients, which revealed functional enrichment in inflammatory signaling pathways, cell death machinery related processes, and dysregulation of mitochondrial homeostasis. Our analyses highlight several specific promising pathways and genes for functional prioritization and provide a cellular context in which such work should be done.

Published
2021

33. Genomewide association study of Parkinson's disease clinical biomarkers in 12 longitudinal patients' cohorts

Author

Iwaki, H., Blauwendraat, C., Leonard, H.L., Kim, J.J., Liu, G.Q., Maple-Grodem, J., Corvol, J.C., Pihlstrom, L., Nimwegen, M. van, Hutten, S.J., Nguyen, K.D.H., Rick, J., Eberly, S., Faghri, F., Auinger, P., Scott, K.M., Wijeyekoon, R., Deerlin, V.M. van, Hernandez, D.G., Gibbs, J.R., Chitrala, K.N., Day-Williams, A.G., Brice, A., Alves, G., Noyce, A.J., Tysnes, O.B., Evans, J.R., Breen, D.P., Estrada, K., Wegel, C.E., Danjou, F., Simon, D.K., Andreassen, O., Ravina, B., Toft, M., Heutink, P., Bloem, B.R., Weintraub, D., Barker, R.A., Williams-Gray, C.H., Warrenburg, B.P. van de, Hilten, J.J. van, Scherzer, C.R., Singleton, A.B., Nalls, M.A., and Int Parkinson's Dis Genomics Cons

Subjects
Parkinson's disease, GBA, Apolipoprotein E, genomewide association study
Published
2019

34. SNCA and mTOR Pathway Single Nucleotide Polymorphisms Interact to Modulate the Age at Onset of Parkinson's Disease

Author

Fernandez-Santiago, R., Martin-Flores, N., Antonelli, F., Cerquera, C., Moreno, V., Bandres-Ciga, S., Manduchi, E., Tolosa, E., Singleton, A.B., Moore, J.H., Noyce, A.J., Kaiyrzhanov, R., Middlehurst, B., Kia, D.A., Tan, M., Houlden, H., Morris, H.R., Plun-Favreau, H., Holmans, P., Hardy, J., Trabzuni, D., Bras, J., Quinn, J., Mok, K.Y., Kinghorn, K.J., Billingsley, K., Wood, N.W., Lewis, P., Schreglmann, S., Guerreiro, R., Lovering, R., R'Bibo, L., Manzoni, C., Rizig, M., Ryten, M., Guelfi, S., Escott-Price, V., Chelban, V., Foltynie, T., Williams, N., Morrison, K.E., Clarke, C., Brice, A., Danjou, F., Lesage, S., Corvol, J.C., Martinez, M., Schulte, C., Brockmann, K., Simoon-Saanchez, J., Heutink, P., Rizzu, P., Sharma, M., Gasser, T., Nicolas, A., Cookson, M.R., Blauwendraat, C., Craig, D.W., Faghri, F., Gibbs, J.R., Hernandez, D.G., Keuren-Jensen, K. van, Shulman, J.M., Iwaki, H., Leonard, H.L., Nalls, M.A., Robak, L., Lubbe, S., Finkbeiner, S., Mencacci, N.E., Lungu, C., Scholz, S.W., Reed, X., Alcalay, R.N., Gan-Or, Z., Rouleau, G.A., Krohn, L., Hilten, J.J. van, Marinus, J., Adarmes-Goomez, A.D., Aguilar, I., Alvarez, I., Alvarez, V., Barrero, F.J., Yarza, J.A.B., Bernal-Bernal, I., Blazquez, M., Bonilla-Toribio, M., Botia, J.A., Boungiorno, M.T., Buiza-Rueda, D., Camara, A., Carrillo, F., Carrion-Claro, M., Cerdan, D., Clarimon, J., Compta, Y., Casa, B. de la, Diez-Fairen, M., Dols-Icardo, O., Duarte, J., Duran, R., Escamilla-Sevilla, F., Ezquerra, M., Feliz, C., Fernandez, M., Garcia, C., Garcia-Ruiz, P., Gomez-Garre, P., Heredia, M.J.G., Gonzalez-Aramburu, I., Pagola, A.G., Hoenicka, J., Infante, J., Jesus, S., Jimenez-Escrig, A., Kulisevsky, J., Labrador-Espinosa, M.A., Lopez-Sendon, J.L., Arregui, A.L.D., Macias, D., Torres, I.M., Marin, J., Marti, M.J., Martinez-Castrillo, C., Mendez-del-Barrio, C., Gonzalez, M.M., Mata, M., Minguez, A., Mir, P., Rezola, E.M., Munoz, E., Pagonabarraga, J., Pascual-Sedano, B., Pastor, P., Errazquin, F.P., Perinan-Tocino, T., Ruiz-Martinez, J., Ruz, C., Rodriguez, A.S., Sierra, M., Suarez-Sanmartin, E., Tabernero, C., Tartari, J.P., Tejera-Parrado, C., Valldeoriola, F., Vargas-Gonzalez, L., Vela, L., Vives, F., Zimprich, A., Pihlstrom, L., Toft, M., Koks, S., Taba, P., Hassin-Baer, S., Malagelada, C., Int Parkinson's Dis Genomics Conso, Fundació La Marató de TV3, Michael J. Fox Foundation for Parkinson's Research, National Institutes of Health (US), Ministerio de Economía y Competitividad (España), Agencia Estatal de Investigación (España), and Ministerio de Ciencia, Innovación y Universidades (España)

Subjects
0301 basic medicine, epistasis, Male, Parkinson's disease, very elderly, alpha-synuclein, Alpha‐synuclein, regulatory associated protein of mTOR, Cohort Studies, 0302 clinical medicine, single nucleotide polymorphism, genetics, Age of Onset, Genetics, Aged, 80 and over, Polymorphism, Single Nucleoti, biology, TOR Serine-Threonine Kinases, target of rapamycin kinase, fchsd1 gene, Age at onset, Chromosome Mapping, glycogen synthase kinase 3beta, Parkinson Disease, Middle Aged, cohort analysis, LRRK2, priority journal, Neurology, chromosomal mapping, neuromodulation, mTOR, alpha-Synuclein, Female, age at onset, Signal Transduction, onset age, Adult, MTOR protein, human, protein kinase LKB1, gene locus, Genotype, multifactor dimensionality reduction, SNP, Single-nucleotide polymorphism, rps6ka2 gene, Polymorphism, Single Nucleotide, Risk Assessment, Article, brain function, 03 medical and health sciences, alpha synuclein, medicine, Humans, controlled study, Genetic Predisposition to Disease, human, ddc:610, SNCA protein, human, gene, Mechanistic target of rapamycin, PI3K/AKT/mTOR pathway, mammalian target of rapamycin, Aged, RPTOR, Epistasis, Genetic, Odds ratio, medicine.disease, major clinical study, nervous system diseases, 030104 developmental biology, mTOR signaling, biology.protein, Epistasis, pathology, Neurology (clinical), genetic predisposition, 030217 neurology & neurosurgery
Abstract

Special Issue: Focused Ultrasound in Parkinson's Disease., [Background] Single nucleotide polymorphisms (SNPs) in the α‐synuclein (SNCA ) gene are associated with differential risk and age at onset (AAO) of both idiopathic and Leucine‐rich repeat kinase 2 (LRRK2)‐associated Parkinson's disease (PD). Yet potential combinatory or synergistic effects among several modulatory SNPs for PD risk or AAO remain largely underexplored., [Objectives] The mechanistic target of rapamycin (mTOR ) signaling pathway is functionally impaired in PD. Here we explored whether SNPs in the mTOR pathway, alone or by epistatic interaction with known susceptibility factors, can modulate PD risk and AAO., [Methods] Based on functional relevance, we selected a total of 64 SNPs mapping to a total of 57 genes from the mTOR pathway and genotyped a discovery series cohort encompassing 898 PD patients and 921 controls. As a replication series, we screened 4170 PD and 3014 controls available from the International Parkinson's Disease Genomics Consortium., [Results] In the discovery series cohort, we found a 4‐loci interaction involving STK11 rs8111699, FCHSD1 rs456998, GSK3B rs1732170, and SNCA rs356219, which was associated with an increased risk of PD (odds ratio = 2.59, P, [Conclusions] These findings indicate that genetic variability in the mTOR pathway contributes to SNCA effects in a nonlinear epistatic manner to modulate differential AAO in PD, unraveling the contribution of this cascade in the pathogenesis of the disease. © 2019 International Parkinson and Movement Disorder Society, Funding Information; Fundació la Marató de TV3. Grant Number: 60510; Michael J. Fox Foundation for Parkinson's Research. Grant Numbers: Dyskinesia Challenge 2014, MJF_PPMI_10_001, PI044024; National Institutes of Health. Grant Number: LM010098; Secretaría de Estado de Investigación, Desarrollo e Innovación. Grant Number: SAF2014‐57160R and SAF2017‐88812R.

Published
2019

35. SNCA and mTOR Pathway Single Nucleotide Polymorphisms Interact to Modulate the Age at Onset of Parkinson's Disease

Author

Martin-Flores, N, Antonelli, F, Cerquera, C, Moreno, V, Manduchi, E, Moore, JH, Noyce, AJ, Kaiyrzhanov, R, Middlehurst, B, Kia, DA, Tan, M, Houlden, H, Morris, HR, Plun-Favreau, H, Holmans, P, Hardy, J, Trabzuni, D, Bras, J, Quinn, J, Mok, KY, Kinghorn, KJ, Billingsley, K, Wood, NW, Lewis, P, Schreglmann, S, Guerreiro, R, Lovering, R, R'Bibo, L, Manzoni, C, Rizig, M, Ryten, M, Guelfi, S, Escott-Price, V, Chelban, V, Foltynie, T, Williams, N, Morrison, KE, Clarke, C, Brice, A, Danjou, F, Lesage, S, Corvol, JC, Martinez, M, Schulte, C, Brockmann, K, Simoon-Saanchez, J, Heutink, P, Rizzu, P, Sharma, M, Gasser, T, Nicolas, A, Cookson, MR, Bandres-Ciga, S, Blauwendraat, C, Craig, DW, Faghri, F, Gibbs, JR, Hernandez, DG, Van Keuren-Jensen, K, Shulman, JM, Iwaki, H, Leonard, HL, Nalls, MA, Robak, L, Lubbe, S, Finkbeiner, S, Mencacci, NE, Lungu, C, Singleton, AB, Scholz, SW, Reed, X, Alcalay, RN, Gan-Or, Z, Rouleau, GA, Krohn, L, van Hilten, JJ, Marinus, J, Adarmes-Goomez, AD, Aguilar, I, Alvarez, I, Alvarez, V, Barrero, FJ, Yarza, JAB, Bernal-Bernal, I, Blazquez, M, Bonilla-Toribio, M, Botia, JA, Boungiorno, MT, Buiza-Rueda, D, Camara, A, Carrillo, F, Carrion-Claro, M, Cerdan, D, Clarimon, J, Compta, Y, de la Casa, B, Diez-Fairen, M, Dols-Icardo, O, Duarte, J, Duran, R, Escamilla-Sevilla, F, Feliz, C, Fernandez, M, Fernandez-Santiago, R, Garcia, C, Garcia-Ruiz, P, Gomez-Garre, P, Heredia, MJG, Gonzalez-Aramburu, I, Pagola, AG, Hoenicka, J, Infante, J, Jesus, S, Jimenez-Escrig, A, Kulisevsky, J, Labrador-Espinosa, MA, Lopez-Sendon, JL, Arregui, ALD, Macias, D, Torres, IM, Marin, J, Marti, MJ, Martinez-Castrillo, C, Mendez-del-Barrio, C, Gonzalez, MM, Mata, M, Minguez, A, Mir, P, Rezola, EM, Munoz, E, Pagonabarraga, J, Pascual-Sedano, B, Pastor, P, Errazquin, FP, Perinan-Tocino, T, Ruiz-Martinez, J, Ruz, C, Rodriguez, AS, Sierra, M, Suarez-Sanmartin, E, Tabernero, C, Tartari, JP, Tejera-Parrado, C, Tolosa, E, Valldeoriola, F, Vargas-Gonzalez, L, Vela, L, Vives, F, Zimprich, A, Pihlstrom, L, Toft, M, Koks, S, Taba, P, Hassin-Baer, S, Ezquerra, M, Malagelada, C, and Int Parkinson's Dis Genomics Conso

Subjects
epistasis, alpha-synuclein, Parkinson's disease, mTOR, SNP, age at onset
Abstract

Background Single nucleotide polymorphisms (SNPs) in the alpha-synuclein (SNCA) gene are associated with differential risk and age at onset (AAO) of both idiopathic and Leucine-rich repeat kinase 2 (LRRK2)-associated Parkinson's disease (PD). Yet potential combinatory or synergistic effects among several modulatory SNPs for PD risk or AAO remain largely underexplored. Objectives The mechanistic target of rapamycin (mTOR) signaling pathway is functionally impaired in PD. Here we explored whether SNPs in the mTOR pathway, alone or by epistatic interaction with known susceptibility factors, can modulate PD risk and AAO. Methods Based on functional relevance, we selected a total of 64 SNPs mapping to a total of 57 genes from the mTOR pathway and genotyped a discovery series cohort encompassing 898 PD patients and 921 controls. As a replication series, we screened 4170 PD and 3014 controls available from the International Parkinson's Disease Genomics Consortium. Results In the discovery series cohort, we found a 4-loci interaction involving STK11 rs8111699, FCHSD1 rs456998, GSK3B rs1732170, and SNCA rs356219, which was associated with an increased risk of PD (odds ratio = 2.59, P < .001). In addition, we also found a 3-loci epistatic combination of RPTOR rs11868112 and RPS6KA2 rs6456121 with SNCA rs356219, which was associated (odds ratio = 2.89; P < .0001) with differential AAO. The latter was further validated (odds ratio = 1.56; P = 0.046-0.047) in the International Parkinson's Disease Genomics Consortium cohort. Conclusions These findings indicate that genetic variability in the mTOR pathway contributes to SNCA effects in a nonlinear epistatic manner to modulate differential AAO in PD, unraveling the contribution of this cascade in the pathogenesis of the disease. (c) 2019 International Parkinson and Movement Disorder Society

Published
2019

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