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Nishizawa Y, Thompson KC, Yamanashi T, Wahba NE, Saito T, Marra PS, Nagao T, Nishiguchi T, Shibata K, Yamanishi K, Hughes CG, Pandharipande P, Cho H, Howard MA, Kawasaki H, Toda H, Kanazawa T, Iwata M, Shinozaki G. Epigenetic signals associated with delirium replicated across four independent cohorts. Transl Psychiatry 2024; 14:275. [PMID: 38965205 PMCID: PMC11224347 DOI: 10.1038/s41398-024-02986-w] [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: 01/03/2024] [Revised: 06/15/2024] [Accepted: 06/25/2024] [Indexed: 07/06/2024] Open
Abstract
Delirium is risky and indicates poor outcomes for patients. Therefore, it is crucial to create an effective delirium detection method. However, the epigenetic pathophysiology of delirium remains largely unknown. We aimed to discover reliable and replicable epigenetic (DNA methylation: DNAm) markers that are associated with delirium including post-operative delirium (POD) in blood obtained from patients among four independent cohorts. Blood DNA from four independent cohorts (two inpatient cohorts and two surgery cohorts; 16 to 88 patients each) were analyzed using the Illumina EPIC array platform for genome-wide DNAm analysis. We examined DNAm differences in blood between patients with and without delirium including POD. When we compared top CpG sites previously identified from the initial inpatient cohort with three additional cohorts (one inpatient and two surgery cohorts), 11 of the top 13 CpG sites showed statistically significant differences in DNAm values between the delirium group and non-delirium group in the same directions as found in the initial cohort. This study demonstrated the potential value of epigenetic biomarkers as future diagnostic tools. Furthermore, our findings provide additional evidence of the potential role of epigenetics in the pathophysiology of delirium including POD.
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Affiliation(s)
- Yoshitaka Nishizawa
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA
- Department of Psychiatry, Osaka Medical and Pharmaceutical University School of Medicine, Osaka, Japan
| | - Kaitlyn C Thompson
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA
- University of Nebraska Medical Center, Omaha, NE, USA
| | - Takehiko Yamanashi
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA
- Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, IA, USA
- Department of Neuropsychiatry, Tottori University Faculty of Medicine, Yonago-shi, Tottori, Japan
| | - Nadia E Wahba
- Department of Psychiatry, Oregon Health and Science University, School of Medicine, Portland, OR, USA
| | - Taku Saito
- Department of Psychiatry, National Defense Medical College School of Medicine, Tokorozawa, Saitama, Japan
| | - Pedro S Marra
- Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Takaaki Nagao
- Department of Neurosurgery, University of Iowa Carver College of Medicine, Iowa City, IA, USA
- Department of Neurosurgery (Sakura), Toho University School of Medicine Faculty of Medicine, Sakura-shi, Chiba, Japan
| | - Tsuyoshi Nishiguchi
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA
- Department of Neuropsychiatry, Tottori University Faculty of Medicine, Yonago-shi, Tottori, Japan
| | - Kazuki Shibata
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA
- Sumitomo Pharma Co, Ltd, Osaka, Osaka, Japan
| | - Kyosuke Yamanishi
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA
- Department of Neuropsychiatry, Hyogo Medical University, College of Medicine, Nishinomiya, Hyogo, Japan
| | - Christopher G Hughes
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Pratik Pandharipande
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Hyunkeun Cho
- University of Iowa, College of Public Health, Iowa City, IA, USA
| | - Matthew A Howard
- Department of Neurosurgery, University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Hiroto Kawasaki
- Department of Neurosurgery, University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Hiroyuki Toda
- Department of Psychiatry, National Defense Medical College School of Medicine, Tokorozawa, Saitama, Japan
| | - Tetsufumi Kanazawa
- Department of Psychiatry, Osaka Medical and Pharmaceutical University School of Medicine, Osaka, Japan
| | - Masaaki Iwata
- Department of Neuropsychiatry, Tottori University Faculty of Medicine, Yonago-shi, Tottori, Japan
| | - Gen Shinozaki
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA.
- Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, IA, USA.
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Zhang X, Fan L, Yang L, Jin X, Liu H, Lei H, Song X, Zhang Z, Zhang F, Song J. DAPK1 mediates cognitive dysfunction and neuronal apoptosis in PSD rats through the ERK/CREB/BDNF signaling pathway. Behav Brain Res 2024; 471:115064. [PMID: 38777261 DOI: 10.1016/j.bbr.2024.115064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/21/2024] [Accepted: 05/18/2024] [Indexed: 05/25/2024]
Abstract
Post-stroke depression (PSD) is one of the most common mental sequelae after a stroke and can damage the brain. Although PSD has garnered increasing attention in recent years, the precise mechanism remains unclear. Studies have indicated that the expression of DAPK1 is elevated in various neurodegenerative conditions, including depression, ischemic stroke, and Alzheimer's disease. However, the specific molecular mechanism of DAPK1-mediated cognitive dysfunction and neuronal apoptosis in PSD rats is unclear. In this study, we established a rat model of PSD, and then assessed depression-like behaviors and cognitive dysfunction in rats using behavioral tests. In addition, we detected neuronal apoptosis and analyzed the expression of DAPK1 protein and proteins related to the ERK/CREB/BDNF signaling pathway. The findings revealed that MCAO combined with CUMS can induce more severe depression-like behaviors and cognitive dysfunction in rats, while overexpression of DAPK1 may hinder the downstream ERK/CREB/BDNF signaling pathways, resulting in neuronal loss and exacerbation of brain tissue damage. In this study, we will focus on DAPK1 and explore its role in PSD.
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Affiliation(s)
- Xinyue Zhang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China; Henan Provincial Key Laboratory of Biological Psychiatry (Xinxiang Medical College), Xinxiang 453000, China
| | - Lifei Fan
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453000, China
| | - Lina Yang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China
| | - Xuejiao Jin
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China; Henan Provincial Key Laboratory of Biological Psychiatry (Xinxiang Medical College), Xinxiang 453000, China
| | - Huanhuan Liu
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China; Henan Provincial Key Laboratory of Biological Psychiatry (Xinxiang Medical College), Xinxiang 453000, China
| | - Hao Lei
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China; Henan Provincial Key Laboratory of Biological Psychiatry (Xinxiang Medical College), Xinxiang 453000, China
| | - Xiaojia Song
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China; Henan Provincial Key Laboratory of Biological Psychiatry (Xinxiang Medical College), Xinxiang 453000, China
| | - Zhaohui Zhang
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453000, China
| | - Fuping Zhang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China; Henan Provincial Key Laboratory of Biological Psychiatry (Xinxiang Medical College), Xinxiang 453000, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, Xinxiang 453000, China; Brain Institute, Henan Academy of Innovations in Medical Science, Zhengzhou 451162, China.
| | - Jinggui Song
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Provincial Psychiatric Hospital, Xinxiang 453000, China; Henan Provincial Key Laboratory of Biological Psychiatry (Xinxiang Medical College), Xinxiang 453000, China; Brain Institute, Henan Academy of Innovations in Medical Science, Zhengzhou 451162, China.
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3
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Zhang T, Kim BM, Lee TH. Death-associated protein kinase 1 as a therapeutic target for Alzheimer's disease. Transl Neurodegener 2024; 13:4. [PMID: 38195518 PMCID: PMC10775678 DOI: 10.1186/s40035-023-00395-5] [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: 10/04/2023] [Accepted: 12/18/2023] [Indexed: 01/11/2024] Open
Abstract
Alzheimer's disease (AD) is the most prevalent form of dementia in the elderly and represents a major clinical challenge in the ageing society. Neuropathological hallmarks of AD include neurofibrillary tangles composed of hyperphosphorylated tau, senile plaques derived from the deposition of amyloid-β (Aβ) peptides, brain atrophy induced by neuronal loss, and synaptic dysfunctions. Death-associated protein kinase 1 (DAPK1) is ubiquitously expressed in the central nervous system. Dysregulation of DAPK1 has been shown to contribute to various neurological diseases including AD, ischemic stroke and Parkinson's disease (PD). We have established an upstream effect of DAPK1 on Aβ and tau pathologies and neuronal apoptosis through kinase-mediated protein phosphorylation, supporting a causal role of DAPK1 in the pathophysiology of AD. In this review, we summarize current knowledge about how DAPK1 is involved in various AD pathological changes including tau hyperphosphorylation, Aβ deposition, neuronal cell death and synaptic degeneration. The underlying molecular mechanisms of DAPK1 dysregulation in AD are discussed. We also review the recent progress regarding the development of novel DAPK1 modulators and their potential applications in AD intervention. These findings substantiate DAPK1 as a novel therapeutic target for the development of multifunctional disease-modifying treatments for AD and other neurological disorders.
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Affiliation(s)
- Tao Zhang
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, 1 Xuefu North Road, Fuzhou, 350122, Fujian, China
| | - Byeong Mo Kim
- Research Center for New Drug Development, AgingTarget Inc., 10F Ace Cheonggye Tower, 53, Seonggogae-Ro, Uiwang-Si, 16006, Gyeonggi-Do, Korea.
| | - Tae Ho Lee
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, 1 Xuefu North Road, Fuzhou, 350122, Fujian, China.
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Wang D, Yan B, Wang A, Sun Q, Pang J, Cui Y, Tian G. Tu-Xian Decoction ameliorates diabetic cognitive impairment by inhibiting DAPK-1. Chin J Nat Med 2023; 21:950-960. [PMID: 38143108 DOI: 10.1016/s1875-5364(23)60428-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Indexed: 12/26/2023]
Abstract
Tu-Xian decoction (TXD), a traditional Chinese medicine (TCM) formula, has been frequently administered to manage diabetic cognitive impairment (DCI). Despite its widespread use, the mechanisms underlying TXD's protective effects on DCI have yet to be fully elucidated. As a significant regulator in neurodegenerative conditions, death-associated protein kinase-1 (DAPK-1) serves as a focus for understanding the action of TXD. This study was designed to whether TXD mediates its beneficial outcomes by inhibiting DAPK-1. To this end, a diabetic model was established using Sprague-Dawley (SD) rats through a high-fat, high-sugar (HFHS) diet regimen, followed by streptozotocin (STZ) injection. The experimental cohort was stratified into six groups: Control, Diabetic, TC-DAPK6, high-dose TXD, medium-dose TXD, and low-dose TXD groups. Following a 12-week treatment period, various assessments-including blood glucose levels, body weight measurements, Morris water maze (MWM) testing for cognitive function, brain magnetic resonance imaging (MRI), and histological analyses using hematoxylin-eosin (H&E), and Nissl staining-were conducted. Protein expression in the hippocampus was quantified through Western blotting analysis. The results revealed that TXD significantly improved spatial learning and memory abilities, and preserved hippocampal structure in diabetic rats. Importantly, TXD administration led to a down-regulation of proteins indicative of neurological damage and suppressed DAPK-1 activity within the hippocampal region. These results underscore TXD's potential in mitigating DCIvia DAPK-1 inhibition, positioning it as a viable therapeutic candidate for addressing this condition. Further investigation into TXD's molecular mechanisms may elucidate new pathways for the treatment of DCI.
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Affiliation(s)
- Danyang Wang
- Department of Traditional Chinese Medicine, Peking Union Medical College Hospital, Beijing 100730, China; Chinese Academy of Mediucal Sciences & Peking Union Medical College, Beijing 100730, China
| | - Bin Yan
- Department of Traditional Chinese Medicine, Peking Union Medical College Hospital, Beijing 100730, China
| | - An Wang
- Department of Traditional Chinese Medicine, Peking Union Medical College Hospital, Beijing 100730, China; Chinese Academy of Mediucal Sciences & Peking Union Medical College, Beijing 100730, China
| | - Qing Sun
- Department of Traditional Chinese Medicine, Peking Union Medical College Hospital, Beijing 100730, China
| | - Junyi Pang
- Department of Pathology, Peking Union Medical College Hospital, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Beijing 100730, China
| | - Yangming Cui
- Animal Research Laboratory Platform, Peking Union Medical College Hospital, the National Science and Technology Key Infrastructure on Translational Medicine, Beijing 100730, China
| | - Guoqing Tian
- Department of Traditional Chinese Medicine, Peking Union Medical College Hospital, Beijing 100730, China.
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5
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Won J, Lee S, Ahmad Khan Z, Choi J, Ho Lee T, Hong Y. Suppression of DAPK1 reduces ischemic brain injury through inhibiting cell death signaling and promoting neural remodeling. Brain Res 2023; 1820:148588. [PMID: 37742938 DOI: 10.1016/j.brainres.2023.148588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/11/2023] [Accepted: 09/10/2023] [Indexed: 09/26/2023]
Abstract
The role of death-associated protein kinase1 (DAPK1) in post-stroke functional recovery is controversial, as is its mechanism of action and any neural remodeling effect after ischemia. To assess the debatable role of DAPK1, we established the middle cerebral artery occlusion (MCAo) model in DAPK1 knockout mice and Sprague-Dawley (SD) rats. We identified that the genetic deletion of the DAPK1 as well as pharmacological inhibition of DAPK1 showed reduced brain infarct volume and neurological deficit. We report that DAPK1 inhibition (DI) reduces post-stroke neuronal death by inhibiting BAX/BCL2 and LC3/Beclin1 mediated apoptosis and autophagy, respectively. Histological analysis displayed a reduction in nuclear condensation, neuronal dissociation, and degraded cytoplasm in the DI group. The DI treatment showed enhanced dendrite spine density and neurite outgrowth, upregulated neural proliferation marker proteins like brain-derived neurotrophic factor, and reduced structural abnormalities of the cortical pyramidal neurons. This research shows that DAPK1 drives cell death, its activation exacerbates functional recovery after cerebral ischemia and shows that oxazolone-based DI could be an excellent candidate for stroke and ischemic injury intervention.
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Affiliation(s)
- Jinyoung Won
- Department of Rehabilitation Science, Graduate School of Inje University, Gimhae, South Korea; Biohealth Products Research Center (BPRC), Inje University, Gimhae, South Korea; Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, South Korea
| | - Seunghoon Lee
- Biohealth Products Research Center (BPRC), Inje University, Gimhae, South Korea; Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, South Korea; Department of Physical Therapy, College of Healthcare Medical Science & Engineering, Inje University, Gimhae, South Korea
| | - Zeeshan Ahmad Khan
- Biohealth Products Research Center (BPRC), Inje University, Gimhae, South Korea; Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, South Korea; Department of Physical Therapy, College of Healthcare Medical Science & Engineering, Inje University, Gimhae, South Korea
| | - Jeonghyun Choi
- Department of Rehabilitation Science, Graduate School of Inje University, Gimhae, South Korea; Biohealth Products Research Center (BPRC), Inje University, Gimhae, South Korea; Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, South Korea
| | - Tae Ho Lee
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Science, Fujian Medical University, Fuzhou, China
| | - Yonggeun Hong
- Department of Rehabilitation Science, Graduate School of Inje University, Gimhae, South Korea; Biohealth Products Research Center (BPRC), Inje University, Gimhae, South Korea; Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, South Korea; Department of Physical Therapy, College of Healthcare Medical Science & Engineering, Inje University, Gimhae, South Korea.
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Li R, Zhi S, Lan G, Chen X, Zheng X, Hu L, Wang L, Zhang T, Lee TH, Rao S, Chen D. Ablation of Death-Associated Protein Kinase 1 Changes the Transcriptomic Profile and Alters Neural-Related Pathways in the Brain. Int J Mol Sci 2023; 24:ijms24076542. [PMID: 37047515 PMCID: PMC10095516 DOI: 10.3390/ijms24076542] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023] Open
Abstract
Death-associated protein kinase 1 (DAPK1), a Ca2+/calmodulin-dependent serine/threonine kinase, mediates various neuronal functions, including cell death. Abnormal upregulation of DAPK1 is observed in human patients with neurological diseases, such as Alzheimer’s disease (AD) and epilepsy. Ablation of DAPK1 expression and suppression of DAPK1 activity attenuates neuropathology and behavior impairments. However, whether DAPK1 regulates gene expression in the brain, and whether its gene profile is implicated in neuronal disorders, remains elusive. To reveal the function and pathogenic role of DAPK1 in neurological diseases in the brain, differential transcriptional profiling was performed in the brains of DAPK1 knockout (DAPK1-KO) mice compared with those of wild-type (WT) mice by RNA sequencing. We showed significantly altered genes in the cerebral cortex, hippocampus, brain stem, and cerebellum of both male and female DAPK1-KO mice compared to those in WT mice, respectively. The genes are implicated in multiple neural-related pathways, including: AD, Parkinson’s disease (PD), Huntington’s disease (HD), neurodegeneration, glutamatergic synapse, and GABAergic synapse pathways. Moreover, our findings imply that the potassium voltage-gated channel subfamily A member 1 (Kcna1) may be involved in the modulation of DAPK1 in epilepsy. Our study provides insight into the pathological role of DAPK1 in the regulatory networks in the brain and new therapeutic strategies for the treatment of neurological diseases.
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Affiliation(s)
- Ruomeng Li
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
| | - Shuai Zhi
- Department of Bioinformatics, Fujian Key Laboratory of Medical Bioinformatics, School of Medical Technology and Engineering, Fujian Medical University, Fuzhou 350122, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Guihua Lan
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
| | - Xiaotong Chen
- Department of Bioinformatics, Fujian Key Laboratory of Medical Bioinformatics, School of Medical Technology and Engineering, Fujian Medical University, Fuzhou 350122, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Xiuzhi Zheng
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
| | - Li Hu
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
| | - Long Wang
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
| | - Tao Zhang
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
| | - Tae Ho Lee
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
| | - Shitao Rao
- Department of Bioinformatics, Fujian Key Laboratory of Medical Bioinformatics, School of Medical Technology and Engineering, Fujian Medical University, Fuzhou 350122, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
- Correspondence: (S.R.); or (D.C.); Tel.: +86-591-8356-9250 (S.R.); +86-591-2286-2498 (D.C.)
| | - Dongmei Chen
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute of Basic Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China (T.H.L.)
- Correspondence: (S.R.); or (D.C.); Tel.: +86-591-8356-9250 (S.R.); +86-591-2286-2498 (D.C.)
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Shi Y, Cui W, Wang Q, Zhou J, Wu X, Wang J, Zhang S, Hu Q, Han L, Du Y, Ge S, Liu H, Qu Y. MicroRNA-124/Death-Associated Protein Kinase 1 Signaling Regulates Neuronal Apoptosis in Traumatic Brain Injury via Phosphorylating NR2B. Front Cell Neurosci 2022; 16:892197. [PMID: 35783103 PMCID: PMC9240278 DOI: 10.3389/fncel.2022.892197] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 05/16/2022] [Indexed: 12/13/2022] Open
Abstract
Death-associated protein kinase 1 (DAPK1), a Ca2+/calmodulin-dependent serine/threonine-protein kinase, promotes neurons apoptosis in ischemic stroke and Alzheimer’s disease (AD). We hypothesized that knockdown DAPK1 may play a protective role in traumatic brain injury (TBI) and explore underlying molecular mechanisms. ELISA, Western blotting, immunofluorescence, dual-luciferase assay, and Reverse Transcription and quantitative Polymerase Chain Reaction (RT-qPCR) were used to determine the mechanism for the role of DAPK1 in TBI. Open field and novel objective recognition tests examined motor and memory functions. The morphology and number of synapses were observed by transmission electron microscopy and Golgi staining. DAPK1 was mainly found in neurons and significantly increased in TBI patients and TBI mice. The dual-luciferase assay showed that DAPK1 was upregulated by miR-124 loss. The number of TUNEL+ cells, expression levels of cleaved caspase3 and p-NR2B/NR2B were significantly reduced after knocking-down DAPK1 or overexpressing miR-124 in TBI mice; and motor and memory dysfunction was recovered. After Tat-NR2B were injected in TBI mice, pathological and behavioral changes were mitigated while the morphology while the number of synapses were not affected. Overall, DAPK1 is a downstream target gene of miR-124 that regulates neuronal apoptosis in TBI mice via NR2B. What’s more, DAPK1 restores motor and memory dysfunctions without affecting the number and morphology of synapses.
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Regulation of DAPK1 by Natural Products: An Important Target in Treatment of Stroke. Neurochem Res 2022; 47:2142-2157. [PMID: 35674928 DOI: 10.1007/s11064-022-03628-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 05/01/2022] [Accepted: 05/05/2022] [Indexed: 12/12/2022]
Abstract
Stroke is a sudden neurological disorder that occurs due to impaired blood flow to an area of the brain. Stroke can be caused by the blockage or rupture of a blood vessel in the brain, called ischemic stroke and hemorrhagic stroke, respectively. Stroke is more common in men than women. Atrial fibrillation, hypertension, kidney disease, high cholesterol and lipids, genetic predisposition, inactivity, poor nutrition, diabetes mellitus, family history and smoking are factors that increase the risk of stroke. Restoring blood flow by repositioning blocked arteries using thrombolytic agents or endovascular therapy are the most effective treatments for stroke. However, restoring circulation after thrombolysis can cause fatal edema or intracranial hemorrhage, and worsen brain damage in a process known as ischemia-reperfusion injury. Therefore, there is a pressing need to find and develop more effective treatments for stroke. In the past, the first choice of treatment was based on natural compounds. Natural compounds are able to reduce the symptoms and reduce various diseases including stroke that attract the attention of the pharmaceutical industry. Nowadays, as a result of the numerous studies carried out in the field of herbal medicine, many useful and valuable effects of plants have been identified. The death-associated protein kinase (DAPK) family is one of the vital families of serine/threonine kinases involved in the regulation of some biological functions in human cells. DAPK1 is the most studied kinase within the DAPKs family as it is involved in neuronal and recovery processes. Dysregulation of DAPK1 in the brain is involved in the developing neurological diseases such as stroke. Natural products can function in a variety of ways, including reducing cerebral edema, reducing brain endothelial cell death, and inhibiting TNFα and interleukin-1β (IL-1β) through regulating the DAPK1 signal against stroke. Due to the role of DAPK1 in neurological disorders, the aim of this article was to investigate the role of DAPK1 in stroke and its modulation by natural compounds.
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Mao R, Zong N, Hu Y, Chen Y, Xu Y. Neuronal Death Mechanisms and Therapeutic Strategy in Ischemic Stroke. Neurosci Bull 2022; 38:1229-1247. [PMID: 35513682 PMCID: PMC9554175 DOI: 10.1007/s12264-022-00859-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 01/18/2022] [Indexed: 12/17/2022] Open
Abstract
Ischemic stroke caused by intracranial vascular occlusion has become increasingly prevalent with considerable mortality and disability, which gravely burdens the global economy. Current relatively effective clinical treatments are limited to intravenous alteplase and thrombectomy. Even so, patients still benefit little due to the short therapeutic window and the risk of ischemia/reperfusion injury. It is therefore urgent to figure out the neuronal death mechanisms following ischemic stroke in order to develop new neuroprotective strategies. Regarding the pathogenesis, multiple pathological events trigger the activation of cell death pathways. Particular attention should be devoted to excitotoxicity, oxidative stress, and inflammatory responses. Thus, in this article, we first review the principal mechanisms underlying neuronal death mediated by these significant events, such as intrinsic and extrinsic apoptosis, ferroptosis, parthanatos, pyroptosis, necroptosis, and autophagic cell death. Then, we further discuss the possibility of interventions targeting these pathological events and summarize the present pharmacological achievements.
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Affiliation(s)
- Rui Mao
- Department of Neurology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Ningning Zong
- Department of Neurology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Yujie Hu
- Department of Neurology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Ying Chen
- Department of Neurology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Yun Xu
- Department of Neurology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
- The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Nanjing University, Nanjing, 210008, China.
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China.
- Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, 210008, China.
- Nanjing Neurology Clinic Medical Center, Nanjing, 210008, China.
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Khan ZA, Sumsuzzman DM, Choi J, Hong Y. Neurodegenerative effect of DAPK1 after cerebral hypoxia-ischemia is associated with its post-transcriptional and signal transduction regulations: A systematic review and meta-analysis. Ageing Res Rev 2022; 76:101593. [PMID: 35202858 DOI: 10.1016/j.arr.2022.101593] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 01/10/2022] [Accepted: 02/18/2022] [Indexed: 01/07/2023]
Abstract
Cerebral hypoxia-ischemia (CHI) causes brain aging, neurological disorders, cognitive decline, motor function impairment, and mortality. Inhibiting death-associated protein kinase 1 (DAPK1) has shown therapeutic potential against CHI, but several reports contradict its protective function, mechanism of activation, and signal transduction. Here, we systematically reviewed the role and the activation mechanism of DAPK1, and quantitatively assess the efficacy of DAPK1 inhibition (DI) methods in neuroprotection, following a CHI in animal models. Embase and PubMed were searched for relevant studies. Overall, 13 studies met the inclusion criteria, and the SYRCLE Risk of bias tool (RoB) tool was used to assess RoB. StataSE 16 was used for meta-analysis and network meta-analysis (NMA). Standardized mean differences (SMD) with 95% confidence intervals (CI) were calculated to estimate the effect size. DI was associated with the reduction of brain infarct volume (BIV) [SMD = -1.70, 95% CI (-2.10, -1.30); p = 0.00], neurological score (N.S.), neuronal degeneration, with no change in the level of in cell death [SMD = -0.83, 95% CI (-2.00, 0.35); p = 0.17], indicating the protective role of DI against CHI. No differences were found in DAPK1 mRNA and protein levels [SMD = 0.50, 95% CI (-0.05, 1.04); p = 0.07] {single-study driven; upregulated after exclusion (p = 0.01, I2 = 36.43)}, whereas phospho-DAPK1 [SMD = -2.22, 95% CI (-3.69, -0.75); p = 0.00] was downregulated and phosphorylated myosin light chain [SMD = 3.37, 95% CI (2.51, 4.96); p = 0.00] was upregulated between CHI and sham groups. Furthermore, we performed NMA to understand the molecular level at which DI offers maximum protection against BIV. Post-transcriptional inhibition (PTI; SUCRA, 82.6%) and gene knockout showed best (KO; SUCRA, 81.3%), signal transduction inhibition (STI; SUCRA, 49.5%) offered 3rd best, while catalytic activity inhibition (CAI; SUCRA, 0.3%) exhibited the lowest reduction in BIV against CHI. The results demonstrate that DI has a neuroprotective effect against CHI and DAPK1 might be regulated at the post-transcriptional and post-translational levels after CHI. Inhibiting DAPK1 at the post-transcriptional level and blocking multiple signal transduction pathways of DAPK1 could lead to better functional recovery against CHI. AVAILABILITY OF DATA AND MATERIALS: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Wang S, Mi R, Cai Z, Wang Z, Zeng C, Xie Z, Li J, Ma M, Liu W, Su H, Cen S, Wu Y, Shen H. DAPK1 Interacts with the p38 isoform MAPK14, Preventing its Nuclear Translocation and Stimulation of Bone Marrow Adipogenesis. Stem Cells 2022; 40:508-522. [PMID: 35403694 DOI: 10.1093/stmcls/sxac013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 02/04/2022] [Indexed: 11/12/2022]
Abstract
Abstract
Bone marrow (BM) adipose tissue (BMAT), a unique adipose depot, plays an important role in diseases such as osteoporosis and bone metastasis. Precise control of mesenchymal stem cell (MSC) differentiation is critical for BMAT formation and regeneration. Here, we show that death associated protein kinase 1 (DAPK1) negatively regulates BM adipogenesis in vitro and in vivo. Prx1 creDapk1 loxp/loxp mice showed more adipocytes in the femur than Dapk1 loxp/loxp mice. Further mechanistic analyses revealed that DAPK1 inhibits p38 mitogen-activated protein kinase (MAPK) signaling in the nucleus by binding the p38 isoform MAPK14, decreasing p38 nuclear activity, which subsequently inhibits BM adipogenesis. The inhibitory effect of DAPK1 against MAPK14 was independent of its kinase activity. In addition, the decreased DAPK1 was observed in the BM-MSCs of ageing mice. Our results reveal a previously undescribed function for DAPK1 in the regulation of adipogenesis, and may also reveal the underlying mechanism of BMAT formation in ageing.
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Affiliation(s)
- Shan Wang
- Center for Biotherapy, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Rujia Mi
- Center for Biotherapy, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Zhaopeng Cai
- Department of Orthopedics, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Ziming Wang
- Department of Orthopedics, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Chenying Zeng
- Center for Biotherapy, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Zhongyu Xie
- Department of Orthopedics, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Jinteng Li
- Department of Orthopedics, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Mengjun Ma
- Department of Orthopedics, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Wenjie Liu
- Department of Orthopedics, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Hongjun Su
- Center for Biotherapy, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, P.R. China
| | - Shuizhong Cen
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, P.R. China
| | - Yanfeng Wu
- Center for Biotherapy, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
| | - Huiyong Shen
- Department of Orthopedics, Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518033, P.R. China
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, P.R. China
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Liu H, Zhang L, Li M, Zhao F, Lu F, Zhang F, Chen S, Guo J, Zhang R, Yin H. Bone mesenchymal stem cell-derived extracellular vesicles inhibit DAPK1-mediated inflammation by delivering miR-191 to macrophages. Biochem Biophys Res Commun 2022; 598:32-39. [PMID: 35151201 DOI: 10.1016/j.bbrc.2022.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 02/03/2022] [Indexed: 12/14/2022]
Abstract
Alveolar macrophage activation and apoptosis are vital contributors to sepsis-associated acute lung injury (ALI). However, the mechanisms of alveolar macrophage activation are yet to be clarified. Death-associated protein kinase 1 (DAPK1) is one of the potential candidates that play crucial roles in regulating alveolar macrophage inflammation. Herein, we found that primary human bone mesenchymal stem cell (BMSC)-derived extracellular vesicles (EVs) antagonize LPS-induced inflammation in the THP-1 human macrophage-like cell line. Mechanistically, LPS stimulation elevates the expression of DAPK1 and the inflammation markers in THP-1 cells, while BMSC-derived EVs inhibit the expression of DAPK1 and inflammation through delivering miR-191, which can target the 3'-UTR of the DAPK1 mRNA and therefore suppress its translation. The importance of DAPK1 in the activation of THP-1 is also stressed in this study. Our findings provide evidence that BMSC-derived EVs regulate the alveolar macrophage inflammation and highlight BMSC-derived EVs as a potential vehicle to deliver biomacromolecules to macrophages.
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Affiliation(s)
- Hui Liu
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China; Department of Intensive Care Unit, Guangzhou Red Cross Hospital, Medical College, Jinan University, Guangzhou, Guangdong Province, China
| | - Luming Zhang
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Meilian Li
- The First Clinical Medical College of Jinan University, Guangzhou, Guangdong Province, China
| | - Fengzhi Zhao
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Fan Lu
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Feng Zhang
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Sida Chen
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Juntao Guo
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Rui Zhang
- Department of Intensive Care Unit, Guangzhou Red Cross Hospital, Medical College, Jinan University, Guangzhou, Guangdong Province, China.
| | - Hanyan Yin
- Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China.
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Shi Y, Tian T, Cai EL, Yang C, Yang X. miR-214 Alleviates Ischemic Stroke-Induced Neuronal Death by Targeting DAPK1 in Mice. Front Neurosci 2021; 15:649982. [PMID: 33841091 PMCID: PMC8032895 DOI: 10.3389/fnins.2021.649982] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/01/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Ischemic stroke induces neuronal cell death and causes brain dysfunction. Preventing neuronal cell death after stroke is key to protecting the brain from stroke damage. Nevertheless, preventative measures and treatment strategies for stroke damage are scarce. Emerging evidence suggests that microRNAs (miRNAs) play critical roles in the pathogenesis of central nervous system (CNS) disorders and may serve as potential therapeutic targets. METHODS A photochemically induced thrombosis (PIT) mouse model was used as an ischemic stroke model. qRT-PCR was employed to assess changes in miRNAs in ischemic lesions of PIT-stroke mice and primary cultured neurons subjected to oxygen-glucose deprivation (OGD). 2,3,5-triphenyltetrazolium chloride (TTC) staining was performed to evaluate brain infarction tissues in vivo. TUNEL staining was employed to assess neuronal death in vitro. Neurological scores and motor coordination were investigated to evaluate stroke damage, including neurological deficits and motor function. RESULTS In vivo and in vitro results demonstrated that levels of miR-124 were significantly decreased following stroke, whereas changes in death-associated protein kinase 1 (DAPK1) levels exhibited the converse pattern. DAPK1 was identified as a direct target of miR-124. N-methyl-D-aspartate (NMDA) and OGD-induced neuronal death was rescued by miR-124 overexpression. Upregulation of miR-124 levels significantly improved PIT-stroke damage, including the overall neurological function in mice. CONCLUSION We demonstrate the involvement of the miR-124/DAPK1 pathway in ischemic neuronal death. Our results highlight the therapeutic potential of targeting this pathway for ischemic stroke.
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Affiliation(s)
- Yan Shi
- Faculty of Laboratory Medicine, School of Medicine, Hunan Normal University, Changsha, China
| | - Tian Tian
- The Brain Cognition and Brain Disease Institute, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Guangdong Key Lab of Brain Connectomics, Shenzhen, China
| | - Er-Li Cai
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
| | - Can Yang
- Department of Emergency Surgery, Hubei Provincial Hospital of Integrated Chinese and Western Medicine, Wuhan, China
| | - Xin Yang
- The Brain Cognition and Brain Disease Institute, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Guangdong Key Lab of Brain Connectomics, Shenzhen, China
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Meng T, Xiao D, Muhammed A, Deng J, Chen L, He J. Anti-Inflammatory Action and Mechanisms of Resveratrol. Molecules 2021; 26:molecules26010229. [PMID: 33466247 PMCID: PMC7796143 DOI: 10.3390/molecules26010229] [Citation(s) in RCA: 236] [Impact Index Per Article: 78.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 12/31/2020] [Accepted: 12/31/2020] [Indexed: 02/07/2023] Open
Abstract
Resveratrol (3,4',5-trihy- droxystilbene), a natural phytoalexin polyphenol, exhibits anti-oxidant, anti-inflammatory, and anti-carcinogenic properties. This phytoalexin is well-absorbed and rapidly and extensively metabolized in the body. Inflammation is an adaptive response, which could be triggered by various danger signals, such as invasion by microorganisms or tissue injury. In this review, the anti-inflammatory activity and the mechanism of resveratrol modulates the inflammatory response are examined. Multiple experimental studies that illustrate regulatory mechanisms and the immunomodulatory function of resveratrol both in vivo and in vitro. The data acquired from those studies are discussed.
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Affiliation(s)
- Tiantian Meng
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China; (T.M.); (A.M.); (J.D.)
| | - Dingfu Xiao
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China; (T.M.); (A.M.); (J.D.)
- Correspondence: (D.X.); (J.H.)
| | - Arowolo Muhammed
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China; (T.M.); (A.M.); (J.D.)
| | - Juying Deng
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China; (T.M.); (A.M.); (J.D.)
| | - Liang Chen
- Huaihua Institute of Agricultural Sciences, No.140 Yingfeng East Road, Hecheng District, Huaihua 418000, China;
| | - Jianhua He
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China; (T.M.); (A.M.); (J.D.)
- Correspondence: (D.X.); (J.H.)
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Comparative Proteomics Unveils LRRFIP1 as a New Player in the DAPK1 Interactome of Neurons Exposed to Oxygen and Glucose Deprivation. Antioxidants (Basel) 2020; 9:antiox9121202. [PMID: 33265962 PMCID: PMC7761126 DOI: 10.3390/antiox9121202] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/01/2020] [Accepted: 11/23/2020] [Indexed: 02/07/2023] Open
Abstract
Death-associated protein kinase 1 (DAPK1) is a pleiotropic hub of a number of networked distributed intracellular processes. Among them, DAPK1 is known to interact with the excitotoxicity driver NMDA receptor (NMDAR), and in sudden pathophysiological conditions of the brain, e.g., stroke, several lines of evidence link DAPK1 with the transduction of glutamate-induced events that determine neuronal fate. In turn, DAPK1 expression and activity are known to be affected by the redox status of the cell. To delineate specific and differential neuronal DAPK1 interactors in stroke-like conditions in vitro, we exposed primary cultures of rat cortical neurons to oxygen/glucose deprivation (OGD), a condition that increases reactive oxygen species (ROS) and lipid peroxides. OGD or control samples were co-immunoprecipitated separately, trypsin-digested, and proteins in the interactome identified by high-resolution LC-MS/MS. Data were processed and curated using bioinformatics tools. OGD increased total DAPK1 protein levels, cleavage into shorter isoforms, and dephosphorylation to render the active DAPK1 form. The DAPK1 interactome comprises some 600 proteins, mostly involving binding, catalytic and structural molecular functions. OGD up-regulated 190 and down-regulated 192 candidate DAPK1-interacting proteins. Some differentially up-regulated interactors related to NMDAR were validated by WB. In addition, a novel differential DAPK1 partner, LRRFIP1, was further confirmed by reverse Co-IP. Furthermore, LRRFIP1 levels were increased by pro-oxidant conditions such as ODG or the ferroptosis inducer erastin. The present study identifies novel partners of DAPK1, such as LRRFIP1, which are suitable as targets for neuroprotection.
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