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Che J, Sun Y, Deng Y, Zhang J. Blood-brain barrier disruption: a culprit of cognitive decline? Fluids Barriers CNS 2024; 21:63. [PMID: 39113115 PMCID: PMC11305076 DOI: 10.1186/s12987-024-00563-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 07/31/2024] [Indexed: 08/10/2024] Open
Abstract
Cognitive decline covers a broad spectrum of disorders, not only resulting from brain diseases but also from systemic diseases, which seriously influence the quality of life and life expectancy of patients. As a highly selective anatomical and functional interface between the brain and systemic circulation, the blood-brain barrier (BBB) plays a pivotal role in maintaining brain homeostasis and normal function. The pathogenesis underlying cognitive decline may vary, nevertheless, accumulating evidences support the role of BBB disruption as the most prevalent contributing factor. This may mainly be attributed to inflammation, metabolic dysfunction, cell senescence, oxidative/nitrosative stress and excitotoxicity. However, direct evidence showing that BBB disruption causes cognitive decline is scarce, and interestingly, manipulation of the BBB opening alone may exert beneficial or detrimental neurological effects. A broad overview of the present literature shows a close relationship between BBB disruption and cognitive decline, the risk factors of BBB disruption, as well as the cellular and molecular mechanisms underlying BBB disruption. Additionally, we discussed the possible causes leading to cognitive decline by BBB disruption and potential therapeutic strategies to prevent BBB disruption or enhance BBB repair. This review aims to foster more investigations on early diagnosis, effective therapeutics, and rapid restoration against BBB disruption, which would yield better cognitive outcomes in patients with dysregulated BBB function, although their causative relationship has not yet been completely established.
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Affiliation(s)
- Ji Che
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, No.270 Dong'An Road, Xuhui District, Shanghai, 200032, P. R. China
| | - Yinying Sun
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, No.270 Dong'An Road, Xuhui District, Shanghai, 200032, P. R. China
| | - Yixu Deng
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, No.270 Dong'An Road, Xuhui District, Shanghai, 200032, P. R. China
| | - Jun Zhang
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, No.270 Dong'An Road, Xuhui District, Shanghai, 200032, P. R. China.
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, P. R. China.
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Baucom MR, Wallen TE, Price AD, England LG, Schuster RM, Goodman MD. Tranexamic Acid Administration Does Not Alter Inflammation After Traumatic Brain Injury, Regardless of Timing. J Surg Res 2024; 302:106-115. [PMID: 39094257 DOI: 10.1016/j.jss.2024.07.023] [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: 11/12/2023] [Revised: 05/15/2024] [Accepted: 07/04/2024] [Indexed: 08/04/2024]
Abstract
INTRODUCTION Tranexamic acid (TXA) administered early after traumatic brain injury (TBI) can decrease morbidity and mortality. The purpose of this study is to determine if the timing of TXA administration after TBI affects postinjury inflammatory markers or phosphorylated tau (p-tau) levels within the hippocampus. METHODS Male mice (9-11 wk) were split into six groups based on injury and timing of TXA administration (n = 5 per group): Sham, TBI-only, 100 mg/kg TXA-only, TBI + TXA 10 min, TBI + TXA 1 h, and TBI + TXA 6 h. Moderate concussive TBI was induced via weight drop. Serum and brain homogenates were collected at 6 and 24 h postinjury and analyzed for 14 inflammatory cytokines via multiplex enzyme-linked immunosorbent assay. Serum was analyzed for glial fibrillary acidic protein levels. Additional cohorts were survived to 30 d for hippocampal p-tau quantification using immunohistochemistry. RESULTS Serum levels of interleukin (IL) 1β (IL-1β), IL-3, IL-12, IL-17, monocyte chemoattractant protein-1, granulocyte-macrophage colony-stimulating factor, and regulated on activation, normal T-cell expressed and secreted were elevated in TBI mice compared to sham mice at 24 h. Levels of IL-1β and monocyte chemoattractant protein-1 were lower in 6-h TXA-treated mice than 1-h TXA-treated mice following TBI. IL-12 and macrophage inflammatory protein-1α levels were decreased in 6-h TXA-treated mice compared to 10-min TXA-treated mice. Administration of TXA at 10 min and 6 h but not 1 h postTBI reduced serum glial fibrillary acidic protein levels compared to TBI-only mice. Hippocampal p-tau accumulation was increased after TBI but not reduced by TXA administration. CONCLUSIONS Our results demonstrate that neither early nor delayed administration of TXA conveyed significant systemic or cerebral benefit in cytokine levels following TBI. Further research should be conducted to assess blood brain barrier integrity and neurobehavioral recovery following TXA administration postTBI.
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Affiliation(s)
- Matthew R Baucom
- Department of Surgery, University of Cincinnati, Cincinnati, Ohio
| | - Taylor E Wallen
- Department of Surgery, University of Cincinnati, Cincinnati, Ohio
| | - Adam D Price
- Department of Surgery, University of Cincinnati, Cincinnati, Ohio
| | - Lisa G England
- Department of Surgery, University of Cincinnati, Cincinnati, Ohio
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Culkin MC, Bele P, Georges AP, Santos P, Niziolek G, Kaplan LJ, Smith DH, Pascual JL. Dose-Dependent Tranexamic Acid Blunting of Penumbral Leukocyte Mobilization and Blood-Brain Barrier Permeability Following Traumatic Brain Injury: An In Vivo Murine Study. Neurocrit Care 2024:10.1007/s12028-024-01952-0. [PMID: 38443709 DOI: 10.1007/s12028-024-01952-0] [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: 10/26/2023] [Accepted: 01/29/2024] [Indexed: 03/07/2024]
Abstract
BACKGROUND Early posttraumatic brain injury (TBI) tranexamic acid (TXA) may reduce blood-brain barrier (BBB) permeability, but it is unclear if this effect is fixed regardless of dose. We hypothesized that post-TBI TXA demonstrates a dose-dependent reduction of in vivo penumbral leukocyte mobilization, BBB microvascular permeability, and enhancement of neuroclinical recovery. METHODS CD1 male mice (n = 40) were randomly assigned to TBI by controlled cortical impact (injury [I]) or sham TBI (S), followed by intravenous bolus of either saline (placebo [P]) or TXA (15, 30, or 60 mg/kg). At 48 h, in vivo pial intravital microscopy visualized live penumbral BBB microvascular leukocytes and albumin leakage. Neuroclinical recovery was assessed by Garcia Neurological Test scores and animal weight changes at 24 h and 48 h after injury. RESULTS I + TXA60 reduced live penumbral leukocyte rolling compared with I + P (p < 0.001) and both lower TXA doses (p = 0.017 vs. I + TXA15, p = 0.012 vs. I + TXA30). Leukocyte adhesion was infrequent and similar across groups. Only I + TXA60 significantly reduced BBB permeability compared with that in the I + P (p = 0.004) group. All TXA doses improved Garcia Test scores relative to I + P at both 24 h and 48 h (p < 0.001 vs. I + P for all at both time points). Mean 24-h body weight loss was greatest in the I + P (- 8.7 ± 1.3%) group and lowest in the I + TXA15 (- 4.4 ± 1.0%, p = 0.051 vs. I + P) group. CONCLUSIONS Only higher TXA dosing definitively abrogates penumbral leukocyte mobilization, preserving BBB integrity post TBI. Some neuroclinical recovery is observed, even with lower TXA dosing. Better outcomes with higher dose TXA after TBI may occur secondary to blunting of leukocyte-mediated penumbral cerebrovascular inflammation.
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Affiliation(s)
- Matthew C Culkin
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, SICU Administration Office - 5 Founders Pavilion, 3400 Spruce Street, Philadelphia, PA, 19104, USA
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Priyanka Bele
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, SICU Administration Office - 5 Founders Pavilion, 3400 Spruce Street, Philadelphia, PA, 19104, USA
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Anastasia P Georges
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Patricia Santos
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, SICU Administration Office - 5 Founders Pavilion, 3400 Spruce Street, Philadelphia, PA, 19104, USA
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Grace Niziolek
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, SICU Administration Office - 5 Founders Pavilion, 3400 Spruce Street, Philadelphia, PA, 19104, USA
| | - Lewis J Kaplan
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, SICU Administration Office - 5 Founders Pavilion, 3400 Spruce Street, Philadelphia, PA, 19104, USA
| | - Douglas H Smith
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jose L Pascual
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, SICU Administration Office - 5 Founders Pavilion, 3400 Spruce Street, Philadelphia, PA, 19104, USA.
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Culkin MC, Coons M, Bele P, Thaploo A, Georges AP, Anderson E, Browne KD, Jacovides C, Santos P, Kaplan LJ, Meaney DF, Smith DH, Pascual JL. Delayed tranexamic acid after traumatic brain injury impedes learning and memory: Early tranexamic acid is favorable but not in sham animals. J Trauma Acute Care Surg 2024; 96:26-34. [PMID: 37853567 DOI: 10.1097/ta.0000000000004155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
BACKGROUND Early but not late tranexamic acid (TXA) after TBI preserves blood-brain-barrier integrity, but it is unclear if and how dose timing affects cognitive recovery beyond hours postinjury. We hypothesized that early (1 hour post-TBI) but not late (24 hours post-TBI) TXA administration improves cognitive recovery for 14 days. METHODS CD1 male mice (n = 25) were randomized to severe TBI (injury [I], by controlled cortical impact) or sham craniotomy (S) followed by intravenous saline at 1 hour (placebo [P1]) or 30 mg/kg TXA at 1 hour (TXA1) or 24 hours (TXA24). Daily body weights, Garcia Neurological Test scores, brain/lung water content, and Morris water maze exercises quantifying swimming traffic in the platform quadrant (zone [Z] 1) and platform area (Z5) were recorded for up to 14 days. RESULTS Among injured groups, I-TXA1 demonstrated fastest weight gain for 14 days and only I-TXA1 showed rapid (day 1) normalization of Garcia Neurological Test ( p = 0.01 vs. I-P1, I-TXA24). In cumulative spatial trials, compared with I-TXA1, I-TXA24 hindered learning (distance to Z5 and % time in Z1, p < 0.05). Compared with I-TXA1, I-TXA24 showed poorer memory with less Z5 time (0.51 vs. 0.16 seconds, p < 0.01) and Z5 crossing frequency. Unexpectedly, TXA in uninjured animals (S-TXA1) displayed faster weight gain but inferior learning and memory. CONCLUSION Early TXA appears beneficial for cognitive and behavioral outcomes following TBI, although administration 24 hours postinjury consistently impairs cognitive recovery. Tranexamic acid in sham animals may lead to adverse effects on cognition.
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Affiliation(s)
- Matthew C Culkin
- From the Division of Traumatology, Surgical Critical Care and Emergency Surgery, Department of Surgery (M.C.C., M.C., P.B., A.T., C.J., P.S., L.J.K., J.L.P.), and Center for Brain Injury and Repair, Department of Neurosurgery (M.C.C., M.C., P.B., A.T., A.P.G., E.A., K.D.B., C.J., P.S., L.J.K., D.F.M., D.H.S., J.L.P.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
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