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Erdos T, Masuda M, Venketaraman V. Glutathione in HIV-Associated Neurocognitive Disorders. Curr Issues Mol Biol 2024; 46:5530-5549. [PMID: 38921002 PMCID: PMC11202908 DOI: 10.3390/cimb46060330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/27/2024] Open
Abstract
A large portion of patients with Human Immunodeficiency Virus (HIV) have neurologic sequelae. Those with better-controlled HIV via antiretroviral therapies generally have less severe neurologic symptoms. However, for many patients, antiretrovirals do not adequately resolve symptoms. Since much of the pathogenesis of HIV/AIDS (Autoimmune Deficiency Syndrome) involves oxidative stress either directly, through viral interaction, or indirectly, through inflammatory mechanisms, we have reviewed relevant trials of glutathione supplementation in each of the HIV-associated neurocognitive diseases and have found disease-specific results. For diseases for which trials have not been completed, predicted responses to glutathione supplementation are made based on relevant mechanisms seen in the literature. It is not sufficient to conclude that all HIV-associated neurocognitive disorders (HAND) will benefit from the antioxidant effects of glutathione supplementation. The potential effects of glutathione supplementation in patients with HAND are likely to differ based on the specific HIV-associated neurocognitive disease.
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Affiliation(s)
| | | | - Vishwanath Venketaraman
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA; (T.E.); (M.M.)
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2
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Nightingale S, Ances B, Cinque P, Dravid A, Dreyer AJ, Gisslén M, Joska JA, Kwasa J, Meyer AC, Mpongo N, Nakasujja N, Pebody R, Pozniak A, Price RW, Sandford C, Saylor D, Thomas KGF, Underwood J, Vera JH, Winston A. Cognitive impairment in people living with HIV: consensus recommendations for a new approach. Nat Rev Neurol 2023; 19:424-433. [PMID: 37311873 DOI: 10.1038/s41582-023-00813-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2023] [Indexed: 06/15/2023]
Abstract
Current approaches to classifying cognitive impairment in people living with HIV can overestimate disease burden and lead to ambiguity around disease mechanisms. The 2007 criteria for HIV-associated neurocognitive disorders (HAND), sometimes called the Frascati criteria, can falsely classify over 20% of cognitively healthy individuals as having cognitive impairment. Minimum criteria for HAND are met on the basis of performance on cognitive tests alone, which might not be appropriate for populations with diverse educational and socioeconomic backgrounds. Imprecise phenotyping of cognitive impairment can limit mechanistic research, biomarker discovery and treatment trials. Importantly, overestimation of cognitive impairment carries the risk of creating fear among people living with HIV and worsening stigma and discrimination towards these individuals. To address this issue, we established the International HIV-Cognition Working Group, which is globally representative and involves the community of people living with HIV. We reached consensus on six recommendations towards a new approach for diagnosis and classification of cognitive impairment in people living with HIV, intended to focus discussion and debate going forward. We propose the conceptual separation of HIV-associated brain injury - including active or pretreatment legacy damage - from other causes of brain injury occurring in people living with HIV. We suggest moving away from a quantitative neuropsychological approach towards an emphasis on clinical context. Our recommendations are intended to better represent the changing profile of cognitive impairment in people living with HIV in diverse global settings and to provide a clearer framework of classification for clinical management and research studies.
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Affiliation(s)
- Sam Nightingale
- HIV Mental Health Research Unit, Division of Neuropsychiatry, Department of Psychiatry and Mental Health, Neuroscience Institute, University of Cape Town, Cape Town, South Africa.
| | - Beau Ances
- Department of Neurology, Washington University School of Medicine, St Louis, MO, USA
| | - Paola Cinque
- Unit of Infectious Diseases, San Raffaele Institute, Milan, Italy
| | - Ameet Dravid
- Department of Medicine, Poona Hospital and Research Centre and Noble Hospital, Pune, India
| | - Anna J Dreyer
- HIV Mental Health Research Unit, Division of Neuropsychiatry, Department of Psychiatry and Mental Health, Neuroscience Institute, University of Cape Town, Cape Town, South Africa
| | - Magnus Gisslén
- Institute of Biomedicine, Department of Infectious Diseases, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
- Region Västra Götaland, Sahlgrenska University Hospital, Department of Infectious Diseases, Gothenburg, Sweden
| | - John A Joska
- HIV Mental Health Research Unit, Division of Neuropsychiatry, Department of Psychiatry and Mental Health, Neuroscience Institute, University of Cape Town, Cape Town, South Africa
| | - Judith Kwasa
- Department of Clinical Medicine and Therapeutics, Faculty of Health Science, University of Nairobi, Nairobi, Kenya
| | - Ana-Claire Meyer
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
| | | | - Noeline Nakasujja
- Department of Psychiatry, College of Health Sciences, Makerere University, Kampala, Uganda
| | | | - Anton Pozniak
- Department of HIV Medicine, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK
- Department of Clinical Research, London School of Hygiene & Tropical Medicine, London, UK
| | - Richard W Price
- Department of Neurology, University of California San Francisco, San Francisco, CA, USA
| | | | - Deanna Saylor
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
- University Teaching Hospital, Lusaka, Zambia
| | - Kevin G F Thomas
- Applied Cognitive Science and Experimental Neuropsychology Team (ACSENT), Department of Psychology, University of Cape Town, Cape Town, South Africa
| | - Jonathan Underwood
- Division of Infection and Immunity, Cardiff University, Cardiff, UK
- Department of Infectious Diseases, Cardiff and Vale University Health Board, Cardiff, UK
| | - Jaime H Vera
- Department of Global Health and Infection, Brighton and Sussex Medical School, Brighton, UK
| | - Alan Winston
- Department of Infectious Disease, Imperial College London, London, UK
- HIV Clinical Trials, Winston Churchill Wing, St Mary's Hospital, London, UK
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3
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Dreyer AJ, Nightingale S, Andersen LS, Lee JS, Gouse H, Safren SA, O’Cleirigh C, Thomas KGF, Joska JA. Sex Differences in the Cognitive Performance of a South African Cohort of People With HIV and Comorbid Major Depressive Disorder. J Int Assoc Provid AIDS Care 2023; 22:23259582231203192. [PMID: 37787183 PMCID: PMC10548808 DOI: 10.1177/23259582231203192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 07/02/2023] [Accepted: 09/05/2023] [Indexed: 10/04/2023] Open
Abstract
Women with HIV (WWH) may be more vulnerable to cognitive impairment than men with HIV (MWH), which may be explained by the direct effects of HIV or by sociodemographic and psychiatric characteristics. We recruited 105 people with HIV (PWH; 76 women) with incomplete antiretroviral therapy adherence, comorbid major depressive disorder, and socioeconomically disadvantaged backgrounds. Participants completed neuropsychological testing and measures gathering sociodemographic, medical, and psychiatric information. We compared WWH and MWH cognitive performance using unadjusted and adjusted regressions, and within each respective group, we explored predictors of cognitive performance. Results showed no significant between-sex differences in cognitive performance, both globally and within domains. Fewer years of education (β = 0.94), illiteracy (β = 4.55), and greater food insecurity (β = -0.28) predicted lower cognitive performance in WWH but not MWH. We conclude that sex differences in PWH are likely due to sample characteristics representing broader inequalities, rather than true biological differences.
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Affiliation(s)
- Anna J. Dreyer
- HIV Mental Health Research Unit, Department of Psychiatry and Mental Health, Neuroscience Institute, University of Cape Town, South Africa
| | - Sam Nightingale
- HIV Mental Health Research Unit, Department of Psychiatry and Mental Health, Neuroscience Institute, University of Cape Town, South Africa
| | - Lena S. Andersen
- Global Health Section, Department of Public Health, University of Copenhagen, Denmark
| | - Jasper S. Lee
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA
| | - Hetta Gouse
- Department of Public Health Sciences, Miller School of Medicine, University of Miami, Coral Gables, FL, USA
| | - Steven A. Safren
- Department of Psychology, University of Miami, , Coral Gables, FL, USA
| | - Conall O’Cleirigh
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
- Department of Psychology, Harvard Medical School, Boston, MA, USA
| | - Kevin G. F. Thomas
- Applied Cognitive Science and Experimental Neuropsychology Team (ACSENT), Department of Psychology, University of Cape Town, South Africa
| | - John A. Joska
- HIV Mental Health Research Unit, Department of Psychiatry and Mental Health, Neuroscience Institute, University of Cape Town, South Africa
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4
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Scanlan A, Zhang Z, Koneru R, Reece M, Gavegnano C, Anderson AM, Tyor W. A Rationale and Approach to the Development of Specific Treatments for HIV Associated Neurocognitive Impairment. Microorganisms 2022; 10:2244. [PMID: 36422314 PMCID: PMC9699382 DOI: 10.3390/microorganisms10112244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/03/2022] [Accepted: 11/08/2022] [Indexed: 05/22/2024] Open
Abstract
Neurocognitive impairment (NCI) associated with HIV infection of the brain impacts a large proportion of people with HIV (PWH) regardless of antiretroviral therapy (ART). While the number of PWH and severe NCI has dropped considerably with the introduction of ART, the sole use of ART is not sufficient to prevent or arrest NCI in many PWH. As the HIV field continues to investigate cure strategies, adjunctive therapies are greatly needed. HIV imaging, cerebrospinal fluid, and pathological studies point to the presence of continual inflammation, and the presence of HIV RNA, DNA, and proteins in the brain despite ART. Clinical trials exploring potential adjunctive therapeutics for the treatment of HIV NCI over the last few decades have had limited success. Ideally, future research and development of novel compounds need to address both the HIV replication and neuroinflammation associated with HIV infection in the brain. Brain mononuclear phagocytes (MPs) are the primary instigators of inflammation and HIV protein expression; therefore, adjunctive treatments that act on MPs, such as immunomodulating agents, look promising. In this review, we will highlight recent developments of innovative therapies and discuss future approaches for HIV NCI treatment.
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Affiliation(s)
- Aaron Scanlan
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
- Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Zhan Zhang
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
- Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Rajeth Koneru
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Monica Reece
- Department of Pathology, Division of Experimental Pathology, Emory University, Atlanta, GA 30322, USA
- Department of Pharmacology and Chemical Biology, Emory University, Atlanta, GA 30322, USA
| | - Christina Gavegnano
- Department of Pathology, Division of Experimental Pathology, Emory University, Atlanta, GA 30322, USA
- Department of Pharmacology and Chemical Biology, Emory University, Atlanta, GA 30322, USA
| | - Albert M. Anderson
- Department of Medicine, Division of Infectious Diseases, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - William Tyor
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
- Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA
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Kolson DL. Developments in Neuroprotection for HIV-Associated Neurocognitive Disorders (HAND). Curr HIV/AIDS Rep 2022; 19:344-357. [PMID: 35867211 PMCID: PMC9305687 DOI: 10.1007/s11904-022-00612-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/02/2022] [Indexed: 01/18/2023]
Abstract
PURPOSE OF REVIEW Reducing the risk of HIV-associated neurocognitive disorders (HAND) is an elusive treatment goal for people living with HIV. Combination antiretroviral therapy (cART) has reduced the prevalence of HIV-associated dementia, but milder, disabling HAND is an unmet challenge. As newer cART regimens that more consistently suppress central nervous system (CNS) HIV replication are developed, the testing of adjunctive neuroprotective therapies must accelerate. RECENT FINDINGS Successes in modifying cART regimens for CNS efficacy (penetrance, chemokine receptor targeting) and delivery (nanoformulations) in pilot studies suggest that improving cART neuroprotection and reducing HAND risk is achievable. Additionally, drugs currently used in neuroinflammatory, neuropsychiatric, and metabolic disorders show promise as adjuncts to cART, likely by broadly targeting neuroinflammation, oxidative stress, aerobic metabolism, and/or neurotransmitter metabolism. Adjunctive cognitive brain therapy and aerobic exercise may provide additional efficacy. Adjunctive neuroprotective therapies, including available FDA-approved drugs, cognitive therapy, and aerobic exercise combined with improved cART offer plausible strategies for optimizing the prevention and treatment of HAND.
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Affiliation(s)
- Dennis L. Kolson
- Department of Neurology, University of Pennsylvania, Room 280C Clinical Research Building, 415 Curie Boulevard, Philadelphia, PA 19104 USA
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Ownby RL, Kim J. Computer-Delivered Cognitive Training and Transcranial Direct Current Stimulation in Patients With HIV-Associated Neurocognitive Disorder: A Randomized Trial. Front Aging Neurosci 2021; 13:766311. [PMID: 34867291 PMCID: PMC8634723 DOI: 10.3389/fnagi.2021.766311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 10/20/2021] [Indexed: 01/13/2023] Open
Abstract
Objective: HIV infection is associated with impaired cognition, and as individuals grow older, they may also experience age-related changes in mental abilities. Previous studies have shown that computer-based cognitive training (CCT) and transcranial direct current stimulation (tDCS) may be useful in improving cognition in older persons. This study evaluated the acceptability of CCT and tDCS to older adults with HIV-associated neurocognitive disorder, and assessed their impact on reaction time, attention, and psychomotor speed. Methods: In a single-blind randomized study, 46 individuals with HIV-associated mild neurocognitive disorder completed neuropsychological assessments and six 20-min training sessions to which they had been randomly assigned to one of the following conditions: (1) CCT with active tDCS; (2) CCT with sham tDCS, or (3) watching educational videos with sham tDCS. Immediately after training and again 1 month later, participants completed follow-up assessments. Outcomes were evaluated via repeated measures mixed effects models. Results: Participant ratings of the intervention were positive. Effects on reaction time were not significant, but measures of attention and psychomotor speed suggested positive effects of the intervention. Conclusion: Both CCT and tDCS were highly acceptable to older persons with HIV infection. CCT and tDCS may improve cognitive in affected individuals. Clinical Trial Registration: [www.ClinicalTrials.gov], identifier [NCT03440840].
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Affiliation(s)
- Raymond L. Ownby
- Department of Psychiatry and Behavioral Medicine, Nova Southeastern University, Fort Lauderdale, FL, United States
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7
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Sharma I. Interrogating the impact of combination antiretroviral therapies on HIV-associated neurocognitive disorders. HIV Med 2021; 22:783-790. [PMID: 34291558 DOI: 10.1111/hiv.13142] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/27/2021] [Accepted: 06/24/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Although the advent of Combination Antiretroviral Therapy (cART) has greatly reduced the prevalence of HIV-Associated Dementia, the most severe form of HIV-Associated Neurocognitive Disorder (HAND), the incidence of the milder forms of HAND have risen. The explanations proposed include persistent central nervous system (CNS) viraemia and the neurotoxicity of chronic cART regimens. Nonetheless, controversies in HAND prevalence estimates, alongside a lack of consensus on the significance of CNS Penetration Effectiveness (CPE) have added to the complexity of elucidating the role of cART in HAND. The present review will evaluate the evidence underlying these explanations, as well as highlighting the need for improved trial designs and the incorporation of emerging biomarkers and neuroimaging tools. METHODS A review of the current literature investigating cART neurotoxicity, controversies in HAND prevalence estimates, CNS Penetration Effectiveness, and neuroprotective adjuvant therapies. CONCLUSIONS Ultimately, the inadequacy of cART in achieving complete preservation of the CNS underscores the imminent need for neuroprotective adjuvant therapies, where the efficacy of combining multiple adjuvant classes presents a potential therapeutic frontier which must be interrogated.
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Affiliation(s)
- Ishta Sharma
- St John's College, University of Oxford, Oxford, UK
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8
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Nakimuli‐Mpungu E, Musisi S, Smith CM, Von Isenburg M, Akimana B, Shakarishvili A, Nachega JB, Mills EJ, Chibanda D, Ribeiro M, V Williams A, Joska JA. Mental health interventions for persons living with HIV in low- and middle-income countries: a systematic review. J Int AIDS Soc 2021; 24 Suppl 2:e25722. [PMID: 34164926 PMCID: PMC8222847 DOI: 10.1002/jia2.25722] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 01/23/2023] Open
Abstract
INTRODUCTION Addressing the intersection between mental health and HIV is critical for the wellbeing of persons living with HIV (PLWH). This systematic review synthesized the literature on mental health interventions for PLWH in low- and middle-income countries (LMICs) to determine intervention components and explore their relationship with intervention effectiveness. METHODS We included only controlled clinical trials of interventions aiming to improve the mental health of PLWH. We conducted a search in the following databases: PubMed, CINAHL, PsycINFO and EMBASE for eligible studies describing the evaluation of interventions for mental health problems among PLWH in LMICs published through August 2020. Two reviewers independently screened references in two successive stages of title/abstract screening and then full-text screening for references meeting title/abstract criteria. RESULTS We identified a total of 30 eligible articles representing 6477 PLWH who were assigned to either the intervention arm (n = 3182) or control arm (n = 3346). The mental health interventions evaluated were psychological (n = 17, 56.67%), pharmacological (n = 6, 20.00%), combined psychological and pharmacological (n = 1, 3.33%) and complementary/alternative treatments (n = 6, 20.00%). The mental health problems targeted were depression (n = 22, 73.33 %), multiple psychological symptoms (n = 1, 3.33%), alcohol and substance use problems (n = 4, 13.33%), post-traumatic stress disorder (n = 1, 3.33%) and HIV-related neuro-cognitive impairment (n = 2, 6.67%). Studies of interventions with significant effects had significantly a higher number of active ingredients than those without significant effects [3.41 (2.24) vs. 1.84 (1.46) Mean (SD)] [Mean difference = -1.56, 95% CI = -3.03 to -0.09, p = 0.037]. CONCLUSIONS There continue to be advances in mental health interventions for PLWH with mental illness in LMICs. However, more research is needed to elucidate how intervention components lead to intervention effectiveness. We recommend scale up of culturally appropriate interventions that have been successfully evaluated in low- and middle-income countries.
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Affiliation(s)
| | - Seggane Musisi
- Department of PsychiatryCollege of Health SciencesMakerere UniversityKampalaUganda
| | - Colin M Smith
- Department of Psychiatry and Behavioral SciencesDuke University Medical CenterDurhamNCUSA
- Department of MedicineDuke University Medical CenterDurhamNCUSA
| | - Megan Von Isenburg
- Duke University Medical Center LibraryDuke University Medical CenterDurhamNCUSA
| | - Benedict Akimana
- The Butabika National Referral HospitalMinistry of HealthKampalaUganda
| | | | - Jean B Nachega
- Department of International Health, Bloomberg's School of Public HealthJohns Hopkins UniversityBaltimoreMDUSA
- Department of EpidemiologyPittsburgh Graduate School of Public HealthUniversity of PittsburghPittsburghPAUSA
- Stellenbosch Center for Infectious DiseaseDepartment of MedicineStellenbosch UniversityStellenboschSouth Africa
| | - Edward J Mills
- Department of Clinical Epidemiology & BiostatisticsMcMaster UniversityHamiltonONCanada
| | - Dixon Chibanda
- Zimbabwe AIDS Prevention ProjectDepartment of Community MedicineUniversity of ZimbabweHarareZimbabwe
| | - Marcelo Ribeiro
- Reference Center for Alcohol, Tobacco and Other Drugs (CRATOD)São Paulo State Secretary of HealthSão PauloBrazil
| | - Anna V Williams
- National Addiction CentreInstitute of Psychiatry, Psychology and NeuroscienceKing's College LondonUK
| | - John A Joska
- HIV Mental Health Research UnitDepartment of PsychiatryNeuroscience InstituteUniversity of Cape TownCape TownSouth Africa
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Decloedt EH, Sinxadi PZ, Wiesner L, Joska JA, Haas DW, Maartens G. Pharmacogenetics of tenofovir and emtricitabine penetration into cerebrospinal fluid. South Afr J HIV Med 2021; 22:1206. [PMID: 34007475 PMCID: PMC8111650 DOI: 10.4102/sajhivmed.v22i1.1206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/09/2021] [Indexed: 01/31/2023] Open
Abstract
Background Blood-cerebrospinal fluid (CSF) barrier transporters affect the influx and efflux of drugs. The antiretrovirals tenofovir and emtricitabine may be substrates of blood-brain barrier (BBB) and blood-CSF barrier transporters, but data are limited regarding the pharmacogenetics and pharmacokinetics of their central nervous system (CNS) penetration. Objectives We investigated genetic polymorphisms associated with CSF disposition of tenofovir and emtricitabine. Method We collected paired plasma and CSF samples from 47 HIV-positive black South African adults who were virologically suppressed on efavirenz, tenofovir and emtricitabine. We considered 1846 single-nucleotide polymorphisms from seven relevant transporter genes (ABCC5, ABCG2, ABCB1, SLCO2B1, SCLO1A2, SLCO1B1 and ABCC4) and 782 met a linkage disequilibrium (LD)-pruning threshold. Results The geometric mean (95% confidence interval [CI]) values for tenofovir and emtricitabine CSF-to-plasma concentration ratios were 0.023 (0.021-0.026) and 0.528 (0.460-0.605), respectively. In linear regression models, the lowest p-value for association with the tenofovir CSF-to-plasma ratio was ABCB1 rs1989830 (p = 1.2 × 10-3) and for emtricitabine, it was ABCC5 rs11921035 (p = 1.4 × 10-3). None withstood correction for multiple testing. Conclusion No genetic polymorphisms were associated with plasma, CSF concentrations or CSF-to-plasma ratios for either tenofovir or emtricitabine.
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Affiliation(s)
- Eric H Decloedt
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.,Division of Clinical Pharmacology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Phumla Z Sinxadi
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Lubbe Wiesner
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - John A Joska
- Department of Psychiatry and Mental Health, Health Sciences, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa
| | - David W Haas
- Department of Medicine, Vanderbilt University Medical Center, Vanderbilt University, Nashville, Tennessee, United States.,Department of Internal Medicine, Meharry Medical College, Nashville, Tennessee, United States
| | - Gary Maartens
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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10
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Decloedt EH, Sinxadi PZ, van Zyl GU, Wiesner L, Khoo S, Joska JA, Haas DW, Maartens G. Pharmacogenetics and pharmacokinetics of CNS penetration of efavirenz and its metabolites. J Antimicrob Chemother 2020; 74:699-709. [PMID: 30535366 DOI: 10.1093/jac/dky481] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/11/2018] [Accepted: 10/24/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND There are limited data on the pharmacogenetics and pharmacokinetics of the CNS penetration of efavirenz. OBJECTIVES We investigated genetic polymorphisms associated with CSF concentrations of efavirenz and its metabolites and explored the relationships with neurocognitive performance. METHODS We included 47 HIV-infected South African black adults with and without HIV-associated neurocognitive disorder on efavirenz/tenofovir/emtricitabine and collected paired plasma-CSF samples. We considered 2049 SNPs, including SNPs known to affect plasma efavirenz exposure, from potentially relevant genes (ABCC5, ABCG2, ABCB1, SLCO2B1, SCLO1A2, ABCC4, CYP2B6 and CYP2A6) and 880 met a linkage disequilibrium (LD)-pruning threshold. RESULTS We identified 9 slow, 21 intermediate and 17 extensive metabolizers. The CYP2B6 983 genotype in multivariate analyses predicted log10-transformed concentrations of plasma efavirenz (β = 0.38, P = 2.7 × 10-03), plasma 7-hydroxy-efavirenz (β = 0.59, P = 3.7 × 10-03), plasma 8-hydroxy-efavirenz:efavirenz ratio (β = -0.31, P = 1.8 × 10-04) and CSF efavirenz (β = 0.36, P = 0.01). Lower plasma 7-hydroxy-efavirenz concentrations were independently associated with CYP2A6 rs10853742 (β = -0.55, P = 3.5 × 10-05), ABCB1 rs115780656 (β = -0.65, P = 4.1 × 10-05) and CYP2A6 -48A→C (β = -0.59, P = 0.01). CYP2A6 -48A→C was independently associated with higher CSF 8-hydroxy-efavirenz:efavirenz ratio (β = 0.54, P = 0.048). CYP2B6 rs2279345 polymorphism was associated with lower plasma 7-hydroxy-efavirenz:efavirenz ratio in multivariate analyses (P < 0.05). No polymorphisms were associated with CSF:plasma ratios of efavirenz, plasma or CSF concentrations of 8-hydroxy-efavirenz or neurocognitive performance. CONCLUSIONS We identified novel genetic associations with plasma efavirenz, plasma 7-hydroxy-efavirenz, plasma 7-hydroxy-efavirenz:efavirenz ratio, plasma 8-hydroxy-efavirenz:efavirenz ratio, CSF efavirenz and CSF 8-hydroxy-efavirenz:efavirenz ratio.
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Affiliation(s)
- Eric H Decloedt
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.,Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Phumla Z Sinxadi
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Gert U van Zyl
- Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University and National Health Laboratory Service, Cape Town, South Africa
| | - Lubbe Wiesner
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Saye Khoo
- Institute of Translational Medicine, University of Liverpool and Royal Liverpool University Hospital, Liverpool, UK
| | - John A Joska
- Division of Neuropsychiatry, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
| | - David W Haas
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Internal Medicine, Meharry Medical College, Nashville, TN, USA
| | - Gary Maartens
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
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Iverson GL, Ivins BJ, Karr JE, Crane PK, Lange RT, Cole WR, Silverberg ND. Comparing Composite Scores for the ANAM4 TBI-MIL for Research in Mild Traumatic Brain Injury. Arch Clin Neuropsychol 2020; 35:56-69. [PMID: 31063188 DOI: 10.1093/arclin/acz021] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 02/26/2019] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The Automated Neuropsychological Assessment Metrics (Version 4) Traumatic Brain Injury Military (ANAM4 TBI-MIL) is commonly administered among U.S. service members both pre-deployment and following TBI. The current study used the ANAM4 TBI-MIL to develop a cognition summary score for TBI research and clinical trials, comparing eight composite scores based on their distributions and sensitivity/specificity when differentiating between service members with and without mild TBI (MTBI). METHOD Male service members with MTBI (n = 56; Mdn = 11 days-since-injury) or no self-reported TBI history (n = 733) completed eight ANAM4 TBI-MIL tests. Their throughput scores (correct responses/minute) were used to calculate eight composite scores: the overall test battery mean (OTBM); global deficit score (GDS); neuropsychological deficit score-weighted (NDS-W); low score composite (LSC); number of scores <50th, ≤16th percentile, or ≤5th percentile; and the ANAM Composite Score (ACS). RESULTS The OTBM and ACS were normally distributed. Other composites had skewed, zero-inflated distributions (62.9% had GDS = 0). All composites differed significantly between participants with and without MTBI (p < .001), with deficit scores showing the largest effect sizes (d = 1.32-1.47). The Area Under the Curve (AUC) was lowest for number of scores ≤5th percentile (AUC = 0.653) and highest for the LSC, OTBM, ACS, and NDS-W (AUC = 0.709-0.713). CONCLUSIONS The ANAM4 TBI-MIL has no well-validated composite score. The current study examined multiple candidate composite scores, finding that deficit scores showed larger group differences than the OTBM, but similar AUC values. The deficit scores were highly correlated. Future studies are needed to determine whether these scores show less redundancy among participants with more severe TBIs.
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Affiliation(s)
- Grant L Iverson
- Department of Physical Medicine and Rehabilitation, Harvard Medical School; Spaulding Rehabilitation Hospital; & Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, Boston, MA, USA
| | - Brian J Ivins
- Defense and Veterans Brain Injury Center, Silver Spring, MD, USA
| | - Justin E Karr
- Departments of Psychiatry and Physical Medicine and Rehabilitation, Harvard Medical School; Spaulding Rehabilitation Hospital; & Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, Boston, MA, USA
| | - Paul K Crane
- Department of Medicine, University of Washington, Seattle, WA, USA
| | - Rael T Lange
- Defense and Veterans Brain Injury Center, Walter Reed National Military Medical Center, Bethesda, MD, USA.,National Intrepid Center of Excellence, Walter Reed National Military Medical Center, Bethesda, MD, USA.,Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, V6T 2A1, Canada
| | - Wesley R Cole
- Defense and Veterans Brain Injury Center; Intrepid Spirit; Womack Army Medical Center; Fort Bragg, NC, USA
| | - Noah D Silverberg
- Division of Physical Medicine and Rehabilitation, University of British Columbia; Rehabilitation Research Program, GF Strong Rehab Centre, Vancouver, British Columbia, V5Z 2G9, Canada
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12
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Iverson GL, Karr JE, Terry DP, Garcia-Barrera MA, Holdnack JA, Ivins BJ, Silverberg ND. Developing an Executive Functioning Composite Score for Research and Clinical Trials. Arch Clin Neuropsychol 2020; 35:312-325. [PMID: 31965141 DOI: 10.1093/arclin/acz070] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 09/30/2019] [Accepted: 10/20/2019] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE Executive functioning encompasses interactive cognitive processes such as planning, organization, set-shifting, inhibition, self-monitoring, working memory, and initiating and sustaining motor and mental activity. Researchers therefore typically assess executive functioning with multiple tests, each yielding multiple scores. A single composite score of executive functioning, which summarizes deficits across a battery of tests, would be useful in research and clinical trials. This study examines multiple candidate composite scores of executive functioning using tests from the Delis-Kaplan Executive Function System (D-KEFS). METHOD Participants were 875 adults between the ages of 20 and 89 years from the D-KEFS standardization sample. Seven Total Achievement scores were used from three tests (i.e., Trail Making, Verbal Fluency, and Color-Word Interference) to form eight composite scores that were compared based on their psychometric properties and association with intelligence (IQ). RESULTS The distributions of most composite scores were mildly to severely skewed, and some had a pronounced ceiling effect. The composite scores all showed a medium positive correlation with IQ. The composite scores were highly intercorrelated in the total sample and in four IQ subgroups (i.e., IQ <89, 90-99, 100-109, 110+), with some being so highly correlated that they appear redundant. CONCLUSIONS This study is part of a larger research program developing a cognition endpoint for research and clinical trials with sound psychometric properties and utility across discrepant test batteries. Future research is needed to examine the reliability and ecological validity of these composite scores.
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Affiliation(s)
- Grant L Iverson
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Spaulding Rehabilitation Hospital, Spaulding Research Institute, and Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, Boston, MA 02129, USA
| | - Justin E Karr
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Spaulding Rehabilitation Hospital, Spaulding Research Institute, and Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, Boston, MA 02129, USA
| | - Douglas P Terry
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Spaulding Rehabilitation Hospital, Spaulding Research Institute, and Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, Boston, MA 02129, USA
| | | | | | - Brian J Ivins
- Defense and Veterans Brain Injury Center, Silver Spring, MD 20910, USA
| | - Noah D Silverberg
- Division of Physical Medicine and Rehabilitation, University of British Columbia; Rehabilitation Research Program, GF Strong Rehab Centre, Vancouver, British Columbia V5Z 2G9, Canada
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13
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Anderson SG, McCaul M, Khoo S, Wiesner L, Sacktor N, Joska JA, Decloedt EH. The neurologic phenotype of South African patients with HIV-associated neurocognitive impairment. Neurol Clin Pract 2019; 10:15-22. [PMID: 32190416 DOI: 10.1212/cpj.0000000000000687] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/30/2019] [Indexed: 11/15/2022]
Abstract
Background The neurologic manifestations of HIV include a spectrum of HIV-associated neurocognitive disorders, as well as a cluster of neurologic symptoms and signs. The neurologic manifestations have been modified but not eradicated by antiretroviral therapy (ART). We describe the neurologic phenotype in South African patients with predominant HIV-1 subtype C infection on ART and its association with neurocognitive impairment and efavirenz and 8-hydroxy-efavirenz concentrations. Methods We conducted a cross-sectional analysis of the neurologic examination findings of HIV+ patients with neurocognitive impairment and used multiple linear regression to explore associations with neurocognitive impairment, efavirenz, and 8-hydroxy-efavirenz pharmacokinetics (plasma and CSF). Results We included 80 participants established on ART (median 40 months) of which 72 (90%) were female. The median age was 35 (interquartile range [IQR], 32-42) and the median Global Deficit Score was 0.94 (IQR 0.63-1.36). We found associations between neurocognitive impairment and neurologic signs: gait (slow walking speed [p = 0.03; R2 = 0.06], gait ataxia [p < 0.01; R2 = 0.21], and abnormal gait appearance [p < 0.01; R2 = 0.18]); coordination (upper limb bradykinesia [p < 0.01; R2 = 0.10] and lower limb bradykinesia [p = 0.01; R2 = 0.10]); reflexes (jaw jerk [p = 0.04; R2 = 0.05] and palmomental response [p = 0.03; R2 = 0.06]); ocular signs (impaired smooth pursuit [p = 0.01; R2 = 0.09] and impaired saccades [p < 0.01; R2 = 0.15]); and motor signs (spasticity [p ≤ 0.01; R2 = 0.15] and muscle weakness [p = 0.01; R2 = 0.08]). No significant associations were found between plasma and CSF efavirenz or 8-hydroxy efavirenz concentrations and any neurologic sign. Conclusion We found that individual neurologic signs were associated with neurocognitive impairment in South African HIV+ patients with predominant HIV-1 subtype C infection on ART and could be used in clinical practice to assess severity. Registration number PACTR201310000635418.
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Affiliation(s)
- Sean G Anderson
- Division of Clinical Pharmacology (SGA, EHD), Faculty of Medicine and Health Sciences, University of Stellenbosch; Biostatistics Unit (MM), Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; Institute of Translational Medicine (SK), University of Liverpool, and Royal Liverpool University Hospital, United Kingdom; Division of Clinical Pharmacology (LW), Department of Medicine, University of Cape Town, South Africa; Department of Neurology (NS), Johns Hopkins University School of Medicine, Baltimore, MD; and Division of Neuropsychiatry (JAJ), Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, South Africa
| | - Michael McCaul
- Division of Clinical Pharmacology (SGA, EHD), Faculty of Medicine and Health Sciences, University of Stellenbosch; Biostatistics Unit (MM), Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; Institute of Translational Medicine (SK), University of Liverpool, and Royal Liverpool University Hospital, United Kingdom; Division of Clinical Pharmacology (LW), Department of Medicine, University of Cape Town, South Africa; Department of Neurology (NS), Johns Hopkins University School of Medicine, Baltimore, MD; and Division of Neuropsychiatry (JAJ), Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, South Africa
| | - Saye Khoo
- Division of Clinical Pharmacology (SGA, EHD), Faculty of Medicine and Health Sciences, University of Stellenbosch; Biostatistics Unit (MM), Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; Institute of Translational Medicine (SK), University of Liverpool, and Royal Liverpool University Hospital, United Kingdom; Division of Clinical Pharmacology (LW), Department of Medicine, University of Cape Town, South Africa; Department of Neurology (NS), Johns Hopkins University School of Medicine, Baltimore, MD; and Division of Neuropsychiatry (JAJ), Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, South Africa
| | - Lubbe Wiesner
- Division of Clinical Pharmacology (SGA, EHD), Faculty of Medicine and Health Sciences, University of Stellenbosch; Biostatistics Unit (MM), Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; Institute of Translational Medicine (SK), University of Liverpool, and Royal Liverpool University Hospital, United Kingdom; Division of Clinical Pharmacology (LW), Department of Medicine, University of Cape Town, South Africa; Department of Neurology (NS), Johns Hopkins University School of Medicine, Baltimore, MD; and Division of Neuropsychiatry (JAJ), Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, South Africa
| | - Ned Sacktor
- Division of Clinical Pharmacology (SGA, EHD), Faculty of Medicine and Health Sciences, University of Stellenbosch; Biostatistics Unit (MM), Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; Institute of Translational Medicine (SK), University of Liverpool, and Royal Liverpool University Hospital, United Kingdom; Division of Clinical Pharmacology (LW), Department of Medicine, University of Cape Town, South Africa; Department of Neurology (NS), Johns Hopkins University School of Medicine, Baltimore, MD; and Division of Neuropsychiatry (JAJ), Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, South Africa
| | - John A Joska
- Division of Clinical Pharmacology (SGA, EHD), Faculty of Medicine and Health Sciences, University of Stellenbosch; Biostatistics Unit (MM), Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; Institute of Translational Medicine (SK), University of Liverpool, and Royal Liverpool University Hospital, United Kingdom; Division of Clinical Pharmacology (LW), Department of Medicine, University of Cape Town, South Africa; Department of Neurology (NS), Johns Hopkins University School of Medicine, Baltimore, MD; and Division of Neuropsychiatry (JAJ), Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, South Africa
| | - Eric H Decloedt
- Division of Clinical Pharmacology (SGA, EHD), Faculty of Medicine and Health Sciences, University of Stellenbosch; Biostatistics Unit (MM), Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; Institute of Translational Medicine (SK), University of Liverpool, and Royal Liverpool University Hospital, United Kingdom; Division of Clinical Pharmacology (LW), Department of Medicine, University of Cape Town, South Africa; Department of Neurology (NS), Johns Hopkins University School of Medicine, Baltimore, MD; and Division of Neuropsychiatry (JAJ), Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, South Africa
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Szulc A, Wiedlocha M, Waszkiewicz N, Galińska-Skok B, Marcinowicz P, Gierus J, Mosiolek A. Proton magnetic resonance spectroscopy changes after lithium treatment. Systematic review. Psychiatry Res Neuroimaging 2018; 273:1-8. [PMID: 29414126 DOI: 10.1016/j.pscychresns.2018.01.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 12/10/2017] [Accepted: 01/12/2018] [Indexed: 01/03/2023]
Abstract
1H MRS is widely used in the research of mental disorders. It enables evaluation of concentration or ratios of several metabolites, which play important roles in brain metabolism: N-acetylaspartate (NAA), choline containing compounds, myo-inositol and glutamate, glutamine and GABA (together as Glx complex or separately). Specifically in bipolar disorder brain metabolite abnormalities include mostly NAA reduces and Glx increases in different brain regions. Bipolar disorder is associated with impairment in neurotrophic and cellular plasticity, resilience pathways and in neuroprotective processes. Lithium, which is commonly used in BD treatment, modulates neurotransmitter release, reduces oxidative stress and apoptosis, induces angiogenesis, neurogenesis and neurotrophic response. Thus brain metabolite abnormalities may elucidate the mechanisms of this processes. In the present article we systematically reviewed 26 studies - the majority of them investigated bipolar disorder ( 7 follow-up and all 11 cross-sectional studies). Moreover we dispute whether the influence of lithium on brain metabolites in bipolar disorder could explain the background of its potential neuroprotective action. The results of our literature review do not equivocally confirm Lithium's influence the metabolite changes in the brain. The majority of the follow-up studies do not support the initially assumed influence of Lithium on the increase of NAA level in various brain structures. The results of studies are inconclusive with regard to levels of Glx or Glu and Lithium intake, rather point a lack of relationship. The above results were reviewed according to the most recent theories in the field accounting for the impact of lithium (1)HMRS measures.
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Affiliation(s)
- Agata Szulc
- Department of Psychiatry, Medical University of Warsaw, Pruszkow, Poland
| | | | | | - Beata Galińska-Skok
- Department of Psychiatry, Medical University of Białystok, Choroszcz, Poland
| | - Piotr Marcinowicz
- Department of Psychiatry, Medical University of Warsaw, Pruszkow, Poland
| | - Jacek Gierus
- Department of Psychiatry, Medical University of Warsaw, Pruszkow, Poland
| | - Anna Mosiolek
- Department of Psychiatry, Medical University of Warsaw, Pruszkow, Poland; Department of Psychiatry, Medical University of Białystok, Choroszcz, Poland
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15
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Nguyen T, Fan T, George SR, Perreault ML. Disparate Effects of Lithium and a GSK-3 Inhibitor on Neuronal Oscillatory Activity in Prefrontal Cortex and Hippocampus. Front Aging Neurosci 2018; 9:434. [PMID: 29375364 PMCID: PMC5770585 DOI: 10.3389/fnagi.2017.00434] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 12/15/2017] [Indexed: 12/11/2022] Open
Abstract
Glycogen synthase kinase-3 (GSK-3) plays a critical role in cognitive dysfunction associated with Alzheimer’s disease (AD), yet the mechanism by which GSK-3 alters cognitive processes in other disorders, such as schizophrenia, remains unknown. In the present study, we demonstrated a role for GSK-3 in the direct regulation of neuronal oscillations in hippocampus (HIP) and prelimbic cortex (PL). A comparison of the GSK-3 inhibitors SB 216763 and lithium demonstrated disparate effects of the drugs on spatial memory and neural oscillatory activity in HIP and PL. SB 216763 administration improved spatial memory whereas lithium treatment had no effect. Analysis of neuronal local field potentials in anesthetized animals revealed that whereas both repeated SB 216763 (2.5 mg/kg) and lithium (100 mg/kg) induced a theta frequency spike in HIP at approximately 10 Hz, only SB 216763 treatment induced an overall increase in theta power (4–12 Hz) compared to vehicle. Acute administration of either drug suppressed slow (32–59 Hz) and fast (61–100 Hz) gamma power. In PL, both drugs induced an increase in theta power. Repeated SB 216763 increased HIP–PL coherence across all frequencies except delta, whereas lithium selectively suppressed delta coherence. These findings demonstrate that GSK-3 plays a direct role in the regulation of theta oscillations in regions critically involved in cognition, and highlight a potential mechanism by which GSK-3 may contribute to cognitive decline in disorders of cognitive dysfunction.
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Affiliation(s)
- Tuan Nguyen
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - Theresa Fan
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - Susan R George
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada.,Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Melissa L Perreault
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
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16
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Gouse H, Casson-Crook M, Decloedt EH, Joska JA, Thomas KGF. Adding a brief self-report cognitive tool to the IHDS improves effectiveness of identifying patients with HIV-associated dementia in South Africa. J Neurovirol 2017; 23:686-695. [PMID: 28748448 DOI: 10.1007/s13365-017-0551-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 06/02/2017] [Accepted: 06/25/2017] [Indexed: 01/17/2023]
Abstract
We compared the diagnostic accuracy of two brief screening tools (the International HIV Dementia Scale (IHDS), and the IHDS combined with a novel self-report instrument, the HIV Cognitive Symptom Questionnaire (HCSQ)) with that of three brief neuropsychological screening batteries (a 2-, a 3-, and a 4-test battery, each consisting of standardized cognitive tests) in discriminating individuals with HIV-associated dementia (HAD) from those with milder forms of cognitive impairment. We analyzed data from 94 isiXhosa-speaking South African HIV-infected participants who were screened as part of a clinical trial evaluating adjunctive treatment in patients with moderate to severe HIV-associated cognitive impairment. A comprehensive neuropsychological battery diagnosed 53% (50/94) of the participants with HAD. We evaluated the sensitivity and specificity for the screening tools and screening batteries. The brief screening tool performed better compared to the brief neuropsychology battery. The IHDS-HCSQ combination delivered 94% sensitivity and 63% specificity for HAD compared to the IHDS (74 and 70% at a cutoff of ≤8) which offers a viable and quick way to screen for HAD in people living with HIV. It is easy to administer, is time- and cost-efficient, and it appears to be a better option, for these purposes, than brief neuropsychology batteries. It is viable for use in clinical, research, and workplace settings when identification of HIV-infected people with severe cognitive impairment is required.
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Affiliation(s)
- Hetta Gouse
- Department of Psychiatry and Mental Health, HIV Mental Health Research Unit, University of Cape Town, Cape Town, South Africa.
| | - Martine Casson-Crook
- Department of Psychiatry and Mental Health, HIV Mental Health Research Unit, University of Cape Town, Cape Town, South Africa
| | - Eric H Decloedt
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, South Africa.,Division of Clinical Pharmacology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - John A Joska
- Department of Psychiatry and Mental Health, HIV Mental Health Research Unit, University of Cape Town, Cape Town, South Africa
| | - Kevin G F Thomas
- Department of Psychology, University of Cape Town, Cape Town, South Africa
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17
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Lesosky M, Joska J, Decloedt E. Simulating therapeutic drug monitoring results for dose individualisation to maintain investigator blinding in a randomised controlled trial. Trials 2017; 18:261. [PMID: 28592271 PMCID: PMC5463313 DOI: 10.1186/s13063-017-1992-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 05/17/2017] [Indexed: 11/22/2022] Open
Abstract
Background Therapeutic drug monitoring (TDM) is essential practice when dosing drugs with a narrow therapeutic index in order to achieve a plasma drug concentration within a narrow target range above the efficacy concentration but below the toxicity concentration. However, TDM with dose individualisation is challenging during a double-blind clinical trial with laboratory staff and investigators blinded to treatment arm allocation. Methods Drug concentrations were simulated for participants in the placebo arm by an unblinded independent statistician, utilising the measured values from the treatment arm participants. Simulated and actual concentrations were re-blinded and passed on to a dose-adjusting investigator, who made dose adjustment recommendations but was not directly responsible for clinical care of participants. Results A total of 257 sham lithium plasma concentrations were simulated utilising 242 true lithium plasma concentrations in real time as the trial progressed. The simulated values had a median (interquartile range) of 0.59 (0.46, 0.72) compared to 0.53 (0.39, 0.72) in the treatment arm. Blinding of the laboratory staff and dose-adjusting investigator was maintained successfully. Conclusions We succeeded in simulating sham lithium plasma concentrations while maintaining blinding. Our simulated values have a smaller range than the observed data, which can be explained by the challenges with respect to drug adherence and dose timing that were experienced. Trial registration Pan African Clinical Trials Registry, PACTR201310000635418. Registered on 30 August 2013.
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Affiliation(s)
- Maia Lesosky
- Division of Epidemiology and Biostatistics, School of Public Health and Family Medicine, University of Cape Town, Cape Town, Western Cape, South Africa.
| | - John Joska
- Division of Neuropsychiatry, Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, Cape Town, Western Cape, South Africa
| | - Eric Decloedt
- Division of Clinical Pharmacology, Department of Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, Western Cape, South Africa
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18
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Decloedt EH, Lesosky M, Maartens G, Joska JA. Renal safety of lithium in HIV-infected patients established on tenofovir disoproxil fumarate containing antiretroviral therapy: analysis from a randomized placebo-controlled trial. AIDS Res Ther 2017; 14:6. [PMID: 28160772 PMCID: PMC5292145 DOI: 10.1186/s12981-017-0134-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/13/2017] [Indexed: 01/06/2023] Open
Abstract
Background The prevalence of bipolar disorder in HIV-infected patients is higher than the general population. Lithium is the most effective mood stabiliser, while tenofovir disoproxil fumarate (TDF) is frequently used as part of combination antiretroviral therapy (ART). Both TDF and lithium are associated with renal tubular toxicity, which could be additive, or a pharmacokinetic interaction may occur at renal transporters with a decrease in TDF elimination. Objective We report on the change in estimated glomerular filtration rate (eGFR) using the modification of diet in renal disease formula in participants who received ART including TDF and were enrolled in a 24 week randomised trial of lithium versus placebo in patients with HIV-associated neurocognitive impairment. Methods We included HIV-infected adults with cognitive impairment established on ART for at least 6 months with a suppressed viral load attending public sector ART clinics in Cape Town, South Africa. We excluded participants with an eGFR <60 mL/min and treated with medications predisposing to lithium toxicity. We reviewed participants weekly for the first month for adverse events followed by 4 weekly visits for renal function assessment, adverse event monitoring and adherence. Lithium dose was titrated to achieve the maintenance target plasma concentration of between 0.6 and 1.0 mmol/L. Sham lithium concentrations were generated for participants receiving placebo. Results We included 23 participants allocated to the lithium arm and 30 participants allocated to the placebo arm. Baseline characteristics were not statistically different with a mean age of 37.7 and 40.8 years, a median time on ART of 33 and 40 months and an eGFR of 139.3 and 131.0 mL/min in the lithium and placebo arms respectively. There was no statistical significant difference in the reduction in eGFR or increase in potassium between the two arms during the 24 weeks. Conclusions We found that 24-week treatment of HIV-infected patients with lithium and TDF did not result in increased nephrotoxicity. Trial registration The study was registered on the Pan African Clinical Trials Registry (PACTR) with the identifier number PACTR201310000635418. Registered 11 October 2013 before the first participant was enrolled
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Gray JP, Suhali-Amacher N, Ray SD. Metals and Metal Antagonists. SIDE EFFECTS OF DRUGS ANNUAL 2017. [DOI: 10.1016/bs.seda.2017.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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