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Arat Çelik HE, Yılmaz S, Akşahin İC, Kök Kendirlioğlu B, Çörekli E, Dal Bekar NE, Çelik ÖF, Yorguner N, Targıtay Öztürk B, İşlekel H, Özerdem A, Akan P, Ceylan D, Tuna G. Oxidatively-induced DNA base damage and base excision repair abnormalities in siblings of individuals with bipolar disorder DNA damage and repair in bipolar disorder. Transl Psychiatry 2024; 14:207. [PMID: 38789433 PMCID: PMC11126633 DOI: 10.1038/s41398-024-02901-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 04/01/2024] [Accepted: 04/05/2024] [Indexed: 05/26/2024] Open
Abstract
Previous evidence suggests elevated levels of oxidatively-induced DNA damage, particularly 8-hydroxy-2'-deoxyguanosine (8-OH-dG), and abnormalities in the repair of 8-OH-dG by the base excision repair (BER) in bipolar disorder (BD). However, the genetic disposition of these abnormalities remains unknown. In this study, we aimed to investigate the levels of oxidatively-induced DNA damage and BER mechanisms in individuals with BD and their siblings, as compared to healthy controls (HCs). 46 individuals with BD, 41 siblings of individuals with BD, and 51 HCs were included in the study. Liquid chromatography-tandem mass spectrometry was employed to evaluate the levels of 8-OH-dG in urine, which were then normalized based on urine creatinine levels. The real-time-polymerase chain reaction was used to measure the expression levels of 8-oxoguanine DNA glycosylase 1 (OGG1), apurinic/apyrimidinic endonuclease 1 (APE1), poly ADP-ribose polymerase 1 (PARP1), and DNA polymerase beta (POLβ). The levels of 8-OH-dG were found to be elevated in both individuals with BD and their siblings when compared to the HCs. The OGG1 and APE1 expressions were downregulated, while POLβ expressions were upregulated in both the patient and sibling groups compared to the HCs. Age, smoking status, and the number of depressive episodes had an impact on APE1 expression levels in the patient group while body mass index, smoking status, and past psychiatric history had an impact on 8-OH-dG levels in siblings. Both individuals with BD and unaffected siblings presented similar abnormalities regarding oxidatively-induced DNA damage and BER, suggesting a link between abnormalities in DNA damage/BER mechanisms and familial susceptibility to BD. Our findings suggest that targeting the oxidatively-induced DNA damage and BER pathway could offer promising therapeutic strategies for reducing the risk of age-related diseases and comorbidities in individuals with a genetic predisposition to BD.
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Affiliation(s)
| | - Selda Yılmaz
- Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey
| | - İzel Cemre Akşahin
- Graduate School of Health Sciences, Koc University, Istanbul, Turkey
- Research Center for Translational Medicine (KUTTAM), School of Medicine, Koc University, Istanbul, Turkey
| | | | - Esma Çörekli
- Department of Psychiatry, School of Medicine, Maltepe University, Istanbul, Turkey
| | - Nazlı Ecem Dal Bekar
- Chair of Proteomics and Bioanalytics, School of Life Sciences, Technical University of Munich, Munich, Germany
| | - Ömer Faruk Çelik
- Department of Medical Biochemistry, Sancaktepe Sehit Prof. Dr. Ilhan Varank Training and Research Hospital, Istanbul, Turkey
| | - Neşe Yorguner
- Department of Psychiatry, School of Medicine, Marmara University, Istanbul, Turkey
| | | | - Hüray İşlekel
- Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey
- Department of Medical Biochemistry, School of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Ayşegül Özerdem
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - Pınar Akan
- Department of Neuroscience, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey
- BioIzmir - Izmir Health Technologies Development and Accelerator Research and Application Center, Dokuz Eylul University, Izmir, Turkey
| | - Deniz Ceylan
- Research Center for Translational Medicine (KUTTAM), School of Medicine, Koc University, Istanbul, Turkey.
- Department of Psychiatry, School of Medicine, Koc University, Istanbul, Turkey.
| | - Gamze Tuna
- Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey
- BioIzmir - Izmir Health Technologies Development and Accelerator Research and Application Center, Dokuz Eylul University, Izmir, Turkey
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Lorenzo EC, Figueroa JE, Demirci DA, El-Tayyeb F, Huggins BJ, Illindala M, Bartley JM, Haynes L, Diniz BS. Unraveling the association between major depressive disorder and senescent biomarkers in immune cells of older adults: a single-cell phenotypic analysis. FRONTIERS IN AGING 2024; 5:1376086. [PMID: 38665228 PMCID: PMC11043554 DOI: 10.3389/fragi.2024.1376086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/19/2024] [Indexed: 04/28/2024]
Abstract
Background: Little is known about the prevalence of cellular senescence among immune cells (i.e., immune cells expressing senescence markers, iSCs) nor is there a gold-standard to efficiently measure iSCs. Major depressive disorder (MDD) in older adults has been associated with many hallmarks of senescence in whole blood, leukocytes, and plasma, supporting a strong connection between iSCs and MDD. Here, we investigated the prevalence and phenotype of iSCs in older adults with MDD. Using a single-cell phenotypic approach, circulating immune cells were examined for iSC biomarkers and their relationship to depression and inflammation. Results: PBMCs from older adults with MDD (aged 69.75 ± 5.23 years) and healthy controls (aged 71.25 ± 8.8 years) were examined for immune subset distribution and senescence biomarkers (i.e., lack of proliferation, senescence-associated heterochromatin foci (SAHF), and DNA damage). Dual-expression of SAHF and DNA damage was categorized by low, intermediate, and high expression. A significant increase in the number of high expressing total PBMCs (p = 0.01), monocytes (p = 0.008), a trending increase in the number of high expressing CD4 T cells (p = 0.06) was observed overall in those with MDD. There was also a significantly lower proportion of intermediate expressing cells in monocytes and CD4 T cells in MDD (p = 0.01 and p = 0.05, respectively). Correlation analysis revealed associations between iSCs and mRNA expression of factors related to SASP and immune cell function. Conclusion: MDD is associated with increased senescent cell biomarkers in immune cell populations delineated by distinct levels of SAHF and DNA damage. Inflammatory markers might serve as potent indicators of iSC burden in MDD.
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Affiliation(s)
- Erica C. Lorenzo
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Jovany E. Figueroa
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
- Ponce Health Sciences University School of Medicine, Ponce, PR, United States
| | - Derya A. Demirci
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Ferris El-Tayyeb
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Billy J. Huggins
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Medha Illindala
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Jenna M. Bartley
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Laura Haynes
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Breno S. Diniz
- UConn Health Center on Aging, University of Connecticut School of Medicine, Farmington, CT, United States
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Ceylan D, Arat-Çelik HE, Aksahin IC. Integrating mitoepigenetics into research in mood disorders: a state-of-the-art review. Front Physiol 2024; 15:1338544. [PMID: 38410811 PMCID: PMC10895490 DOI: 10.3389/fphys.2024.1338544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 01/24/2024] [Indexed: 02/28/2024] Open
Abstract
Mood disorders, including major depressive disorder and bipolar disorder, are highly prevalent and stand among the leading causes of disability. Despite the largely elusive nature of the molecular mechanisms underpinning these disorders, two pivotal contributors-mitochondrial dysfunctions and epigenetic alterations-have emerged as significant players in their pathogenesis. This state-of-the-art review aims to present existing data on epigenetic alterations in the mitochondrial genome in mood disorders, laying the groundwork for future research into their pathogenesis. Associations between abnormalities in mitochondrial function and mood disorders have been observed, with evidence pointing to notable changes in mitochondrial DNA (mtDNA). These changes encompass variations in copy number and oxidative damage. However, information on additional epigenetic alterations in the mitochondrial genome remains limited. Recent studies have delved into alterations in mtDNA and regulations in the mitochondrial genome, giving rise to the burgeoning field of mitochondrial epigenetics. Mitochondrial epigenetics encompasses three main categories of modifications: mtDNA methylation/hydroxymethylation, modifications of mitochondrial nucleoids, and mitochondrial RNA alterations. The epigenetic modulation of mitochondrial nucleoids, lacking histones, may impact mtDNA function. Additionally, mitochondrial RNAs, including non-coding RNAs, present a complex landscape influencing interactions between the mitochondria and the nucleus. The exploration of mitochondrial epigenetics offers valuable perspectives on how these alterations impact neurodegenerative diseases, presenting an intriguing avenue for research on mood disorders. Investigations into post-translational modifications and the role of mitochondrial non-coding RNAs hold promise to unravel the dynamics of mitoepigenetics in mood disorders, providing crucial insights for future therapeutic interventions.
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Affiliation(s)
- Deniz Ceylan
- Department of Psychiatry, School of Medicine, Koç University, Istanbul, Türkiye
- Koç University Research Center for Translational Medicine (KUTTAM), Affective Laboratory, Istanbul, Türkiye
| | | | - Izel Cemre Aksahin
- Koç University Research Center for Translational Medicine (KUTTAM), Affective Laboratory, Istanbul, Türkiye
- Graduate School of Health Sciences, Koç University, Istanbul, Türkiye
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Çeli K HEA, Tuna G, Ceylan D, Küçükgöncü S. A comparative meta-analysis of peripheral 8-hydroxy-2'-deoxyguanosine (8-OHdG) or 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG) levels across mood episodes in bipolar disorder. Psychoneuroendocrinology 2023; 151:106078. [PMID: 36931055 DOI: 10.1016/j.psyneuen.2023.106078] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/28/2023] [Accepted: 03/05/2023] [Indexed: 03/19/2023]
Abstract
OBJECTIVE Oxidative DNA damage has been associated with the pathophysiology of bipolar disorder (BD) as one of the common pathways between increased medical comorbidity and premature aging in BD. Previous evidence shows increased levels of oxidatively induced DNA damage markers, 8-hydroxy-2'-deoxyguanosine (8-OHdG) or its tautomer 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG), in patients with BD in comparison to healthy individuals. With the current research, we aim to analyze data on peripheral (blood or urine) 8-OHdG/8-oxo-dG levels across mood states of BD using a meta-analytical approach. METHOD A literature search was conducted using the databases PubMed, Scopus, and Web of Science to identify eligible studies (January 1989 to July 2022). Relevant studies were systematically reviewed; a random-effects meta-analysis and a meta-regression analysis were conducted. RESULTS The current meta-analysis included 12 studies consisting of 808 BD patients (390 in euthymia, 156 in mania, 137 in depression, 16 in mixed episode, 109 not specified) and 563 healthy controls. BD patients that were currently depressed had significantly higher levels of 8-OHdG/8-oxo-dG than healthy controls, while euthymic or manic patients did not differ from healthy controls. A meta-regression analysis showed sex distribution (being female) and older age to be significantly related to increased 8-OHdG/8-oxo-dG levels. CONCLUSION Our findings suggest that 8-OHdG/8-oxo-dG may be a state-related marker of depression in BD and may be affected by older age and female gender.
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Affiliation(s)
- Hidayet Ece Arat Çeli K
- Maltepe University, Faculty of Medicine, Department of Psychiatry, İstanbul, Turkey; Dokuz Eylül University, Institute of Health Sciences, Department of Neuroscience, İzmir, Turkey
| | - Gamze Tuna
- Dokuz Eylül University, Institute of Health Sciences, Department of Molecular Medicine, İzmir, Turkey
| | - Deniz Ceylan
- Koç University, Faculty of Medicine, Department of Psychiatry, İstanbul, Turkey; Koç University, Research Center for Translational Medicine, İstanbul, Turkey.
| | - Suat Küçükgöncü
- Maltepe University, Faculty of Medicine, Department of Psychiatry, İstanbul, Turkey
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Fries GR, Saldana VA, Finnstein J, Rein T. Molecular pathways of major depressive disorder converge on the synapse. Mol Psychiatry 2023; 28:284-297. [PMID: 36203007 PMCID: PMC9540059 DOI: 10.1038/s41380-022-01806-1] [Citation(s) in RCA: 86] [Impact Index Per Article: 86.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 09/07/2022] [Accepted: 09/14/2022] [Indexed: 01/07/2023]
Abstract
Major depressive disorder (MDD) is a psychiatric disease of still poorly understood molecular etiology. Extensive studies at different molecular levels point to a high complexity of numerous interrelated pathways as the underpinnings of depression. Major systems under consideration include monoamines, stress, neurotrophins and neurogenesis, excitatory and inhibitory neurotransmission, mitochondrial dysfunction, (epi)genetics, inflammation, the opioid system, myelination, and the gut-brain axis, among others. This review aims at illustrating how these multiple signaling pathways and systems may interact to provide a more comprehensive view of MDD's neurobiology. In particular, considering the pattern of synaptic activity as the closest physical representation of mood, emotion, and conscience we can conceptualize, each pathway or molecular system will be scrutinized for links to synaptic neurotransmission. Models of the neurobiology of MDD will be discussed as well as future actions to improve the understanding of the disease and treatment options.
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Affiliation(s)
- Gabriel R. Fries
- grid.267308.80000 0000 9206 2401Translational Psychiatry Program, Faillace Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, 1941 East Rd, Houston, TX 77054 USA ,grid.240145.60000 0001 2291 4776Neuroscience Graduate Program, The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, 6767 Bertner Ave, Houston, TX 77030 USA
| | - Valeria A. Saldana
- grid.262285.90000 0000 8800 2297Frank H. Netter MD School of Medicine at Quinnipiac University, 370 Bassett Road, North Haven, CT 06473 USA
| | - Johannes Finnstein
- grid.419548.50000 0000 9497 5095Department of Translational Research in Psychiatry, Project Group Molecular Pathways of Depression, Max Planck Institute of Psychiatry, Kraepelinstr. 10, 80804 Munich, Germany
| | - Theo Rein
- Department of Translational Research in Psychiatry, Project Group Molecular Pathways of Depression, Max Planck Institute of Psychiatry, Kraepelinstr. 10, 80804, Munich, Germany.
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