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Kim C, Yousefian-Jazi A, Choi SH, Chang I, Lee J, Ryu H. Non-Cell Autonomous and Epigenetic Mechanisms of Huntington's Disease. Int J Mol Sci 2021; 22:12499. [PMID: 34830381 PMCID: PMC8617801 DOI: 10.3390/ijms222212499] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/10/2021] [Accepted: 11/15/2021] [Indexed: 02/06/2023] Open
Abstract
Huntington's disease (HD) is a rare neurodegenerative disorder caused by an expansion of CAG trinucleotide repeat located in the exon 1 of Huntingtin (HTT) gene in human chromosome 4. The HTT protein is ubiquitously expressed in the brain. Specifically, mutant HTT (mHTT) protein-mediated toxicity leads to a dramatic degeneration of the striatum among many regions of the brain. HD symptoms exhibit a major involuntary movement followed by cognitive and psychiatric dysfunctions. In this review, we address the conventional role of wild type HTT (wtHTT) and how mHTT protein disrupts the function of medium spiny neurons (MSNs). We also discuss how mHTT modulates epigenetic modifications and transcriptional pathways in MSNs. In addition, we define how non-cell autonomous pathways lead to damage and death of MSNs under HD pathological conditions. Lastly, we overview therapeutic approaches for HD. Together, understanding of precise neuropathological mechanisms of HD may improve therapeutic approaches to treat the onset and progression of HD.
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Affiliation(s)
- Chaebin Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Korea; (C.K.); (A.Y.-J.); (S.-H.C.)
| | - Ali Yousefian-Jazi
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Korea; (C.K.); (A.Y.-J.); (S.-H.C.)
| | - Seung-Hye Choi
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Korea; (C.K.); (A.Y.-J.); (S.-H.C.)
| | - Inyoung Chang
- Department of Biology, Boston University, Boston, MA 02215, USA;
| | - Junghee Lee
- Boston University Alzheimer’s Disease Research Center, Boston University, Boston, MA 02118, USA
- Department of Neurology, Boston University School of Medicine, Boston, MA 02118, USA
- VA Boston Healthcare System, Boston, MA 02130, USA
| | - Hoon Ryu
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Korea; (C.K.); (A.Y.-J.); (S.-H.C.)
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Frank L, Wesson Ashford J, Bayley PJ, Borson S, Buschke H, Cohen D, Cummings JL, Davies P, Dean M, Finkel SI, Hyer L, Perry G, Powers RE, Schmitt F. Genetic Risk of Alzheimer's Disease: Three Wishes Now That the Genie is Out of the Bottle. J Alzheimers Dis 2019; 66:421-423. [PMID: 30282369 PMCID: PMC6218128 DOI: 10.3233/jad-180629] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The availability and increasing popularity of direct-to-consumer genetic testing for the presence of an APOE4 allelle led the Alzheimer's Foundation of America Medical, Scientific and Memory Screening Advisory Board to identify three critical areas for attention: 1) ensure consumer understanding of test results; 2) address and limit potential negative consequences of acquiring this information; and 3) support linking results with positive health behaviors, including potential clinical trial participation. Improving access to appropriate sources of genetic counseling as part of the testing process is critical and requires action from clinicians and the genetic testing industry. Standardizing information and resources across the industry should start now, with the input of consumers and experts in genetic risk and health information disclosure. Direct-to-consumer testing companies and clinicians should assist consumers by facilitating consultation with genetic counselors and facilitating pursuit of accurate information about testing.
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Affiliation(s)
- Lori Frank
- Health and Aging Policy Fellow/American Political Science Association Congressional Fellow; Senior Advisor, PCORI, Bethesda, MD, USA
| | - J Wesson Ashford
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA and War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - Peter J Bayley
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA and War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - Soo Borson
- University of Washington School of Medicine, University of Washington, Seattle, WA, USA and University of Minnesota, Minneapolis, MN, USA
| | - Herman Buschke
- The Saul R. Korey Department of Neurology and Dominick P. Purpura Department of Neuroscience, Lena and Joseph Gluck Distinguished Scholar in Neurology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Donna Cohen
- Department of Child & Family Studies, College of Behavioral & Community Sciences, University of South Florida, Tampa, FL, USA
| | - Jeffrey L Cummings
- Center for Neurodegeneration and Translational Neuroscience, Cleveland Clinic Lou Ruvo Center for Brain Health, Las Vegas, NY, USA
| | - Peter Davies
- Litwin-Zucker Center for Alzheimer's Disease & Memory Disorders, The Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - Margaret Dean
- Texas Tech University Health Sciences Center, Internal Medicine, Amarillo, TX, USA
| | - Sanford I Finkel
- Department of Psychiatry, University of Chicago Medical School, Chicago, IL, USA
| | - Lee Hyer
- Department of Psychiatry, Mercer School of Medicine, Macon, GA, USA
| | - George Perry
- Brain Health Consortium, Department Biology and Chemistry, University of Texas at San Antonio, San Antonio, TX, USA
| | - Richard E Powers
- Departments of Pathology and Psychiatry, University of Alabama School of Medicine, Birmingham, AL, USA
| | - Frederick Schmitt
- University of Kentucky, Sanders-Brown Center on Aging, Lexington, KY, USA
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Ross CA, Reilmann R, Cardoso F, McCusker EA, Testa CM, Stout JC, Leavitt BR, Pei Z, Landwehrmeyer B, Martinez A, Levey J, Srajer T, Bang J, Tabrizi SJ. Movement Disorder Society Task Force Viewpoint: Huntington's Disease Diagnostic Categories. Mov Disord Clin Pract 2019; 6:541-546. [PMID: 31538087 PMCID: PMC6749806 DOI: 10.1002/mdc3.12808] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 04/12/2019] [Accepted: 04/15/2019] [Indexed: 12/20/2022] Open
Affiliation(s)
- Christopher A. Ross
- Departments of Psychiatry, Neurology, Neuroscience, and Pharmacology and Huntington's Disease CenterJohns Hopkins University School of MedicineBaltimoreMDUSA
| | - Ralf Reilmann
- George Huntington Institut, Head, European HD Network (EHDN) Huntington CenterUniversity of MunsterMunsterGermany
| | - Francisco Cardoso
- Department of Neurology in the Movement Disorders Unit, Neurology ServiceInternal Medicine Department of the Federal University of Minas GeraisBelo HorizonteMGBrazil
| | - Elizabeth A. McCusker
- Neurology Department, Huntington Disease ServiceWestmead Hospital and Sydney University Medical SchoolSydneyAustralia
| | | | - Julie C. Stout
- Institute of Cognitive and Clinical Neurosciences, School of Psychological SciencesMonash UniversityVictoriaAustralia
| | - Blair R. Leavitt
- Department of Medical Genetics and Centre for Molecular Medicine and TherapeuticsThe University of British ColumbiaVancouverCanada
| | - Zhong Pei
- The First Affiliated HospitalSun Yat‐Sen UniversityGuangzhouChina
| | | | | | - Jamie Levey
- Cure HD Initiative (CHDI) Management/CHDI FoundationPrincetonNJUSA
- European Huntington's Disease NetworkUniversity Hospital of UlmUlmGermany
| | | | - Jee Bang
- Departments of Neurology and Psychiatry, and Huntington's Disease CenterJohns Hopkins University School of MedicineBaltimoreMDUSA
| | - Sarah J. Tabrizi
- Huntington's Disease Centre, University College LondonQueen Square Institute of NeurologyLondonUnited Kingdom
- UK Dementia Research InstituteUniversity College LondonLondonUnited Kingdom
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Migliore S, Jankovic J, Squitieri F. Genetic Counseling in Huntington's Disease: Potential New Challenges on Horizon? Front Neurol 2019; 10:453. [PMID: 31114543 PMCID: PMC6503085 DOI: 10.3389/fneur.2019.00453] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 04/15/2019] [Indexed: 01/08/2023] Open
Abstract
Huntington's disease (HD) is a rare, hereditary, neurodegenerative and dominantly transmitted disorder affecting about 10 out of 100,000 people in Western Countries. The genetic cause is a CAG repeat expansion in the huntingtin gene (HTT), which is unstable and may further increase its length in subsequent generations, so called anticipation. Mutation repeat length coupled with other gene modifiers and environmental factors contribute to the age at onset in the offspring. Considering the unpredictability of age at onset and of clinical prognosis in HD, the accurate interpretation, a proper psychological support and a scientifically sound and compassionate communication of the genetic test result are crucial in the context of Good Clinical Practice and when considering further potential disease-modifying therapies. We discuss various genetic test scenarios that require a particularly careful attention in psychological and genetic counseling and expect that the counseling procedures will require a constant update.
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Affiliation(s)
- Simone Migliore
- Huntington and Rare Diseases Unit, Fondazione IRCCS Casa Sollievo Della Sofferenza Research Hospital, San Giovanni Rotondo, Italy
| | - Joseph Jankovic
- Department of Neurology, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, Houston, TX, United States
| | - Ferdinando Squitieri
- Huntington and Rare Diseases Unit, Fondazione IRCCS Casa Sollievo Della Sofferenza Research Hospital, San Giovanni Rotondo, Italy
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