1
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Sukun A, Cekic B. Assessment of BNP and BDNF results in elective endovascular cerebral aneurysm treatment. Ir J Med Sci 2021; 191:1899-1903. [PMID: 34586564 DOI: 10.1007/s11845-021-02791-0] [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: 08/03/2021] [Accepted: 09/21/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND B-type natriuretic peptide (BNP) levels increase with an increase in intracranial pressure. A decrease in BNP levels has been found to be associated with patient positive prognosis. Brain-derived neurotrophic factor (BDNF) levels decrease in patients with acute stroke. AIMS To compare the BNP and BDNF values in serum before and after elective endovascular cerebral aneurysm treatment (ECAT). METHODS A total of 50 patients who underwent elective ECAT were included in the study. Exclusion criteria were determined to be history of heart failure or heart attack (n = 8), renal failure (n = 5), subarachnoid hemorrhage (n = 4), or previous aneurysm clip procedure (n = 3). Intravenous blood samples were obtained from 30 patients who underwent elective ECAT before and after treatment. After centrifugation, the BNP and BDNF values in serum were obtained with the ELISA method and compared. RESULTS This study included 19 female and 11 male patients, aged between 24 and 75 years. The average age of the patients was 51.27 ± 13.31 years. The median BDNF values did not change significantly after ECAT (before the endovascular procedure: 3.1 ± 1.3 pg/dl; after the endovascular procedure: 2.8 ± 0.9 pg/dl, p = 0.16). Median BNP levels decreased significantly after ECAT (before the endovascular procedure: 617.50 ± 483.11 pg/ml; after the endovascular procedure: 395.00 ± 352.15 pg/ml, p < 0.001). CONCLUSIONS After elective endovascular cerebral aneurysm treatment, the BNP values in serum decreased significantly, and the BDNF values in serum did not change significantly.
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Affiliation(s)
- Abdullah Sukun
- Department of Radiology, Kars Harakani State Hospital, Kars Harakani Devlet Hastanesi, Yenisehir Mah, İsmail Aytemiz Blv. No: 55 36200, Kars, Turkey.
| | - Bulent Cekic
- Department of Radiology, Antalya Education and Research Hospital, Antalya, Turkey
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2
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Cui YH, Zhou SF, Liu Y, Wang S, Li F, Dai RP, Hu ZL, Li CQ. Injection of Anti-proBDNF Attenuates Hippocampal-Dependent Learning and Memory Dysfunction in Mice With Sepsis-Associated Encephalopathy. Front Neurosci 2021; 15:665757. [PMID: 34354558 PMCID: PMC8329425 DOI: 10.3389/fnins.2021.665757] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 05/26/2021] [Indexed: 12/14/2022] Open
Abstract
Sepsis-associated encephalopathy (SAE) is a risk factor for cognitive and memory dysfunction; however, the mechanism remains unclear. Brain-derived neurotrophic factor (BDNF) was reported to have a positive effect on cognition and emotion regulation, but the study of its precursor, proBDNF, has been limited. This study aimed to elucidate the effects and associated mechanisms of hippocampal proBDNF in a lipopolysaccharide (LPS)-induced SAE mouse model. In this study, we found that the mice exhibited cognitive dysfunction on day 7 after LPS injection. The expression of proBDNF and its receptor, p75NTR, was also increased in the hippocampus, while the levels of BDNF and its receptor, TrkB, were decreased. A co-localization study showed that proBDNF and p75NTR were mainly co-localized with neurons. Furthermore, LPS treatment reduced the expression of NeuN, Nissl bodies, GluR4, NR1, NR2A, and NR2B in the hippocampus of SAE mice. Furthermore, an intrahippocampal or intraperitoneal injection of anti-proBDNF antibody was able to ameliorate LPS-induced cognitive dysfunction and restore the expression of NeuN, Nissl bodies, GluR4, NR1, NR2A, NR2B, and PSD95. These results indicated that treatment with brain delivery by an intrahippocampal and systemic injection of mAb-proBDNF may represent a potential therapeutic strategy for treating patients with SAE.
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Affiliation(s)
- Yan-Hui Cui
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha, China.,Department of Respiratory and Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Shi-Fen Zhou
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Yu Liu
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha, China.,Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Shuang Wang
- Department of Medical Research Center and Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, China
| | - Fang Li
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha, China
| | - Ru-Ping Dai
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Zhao-Lan Hu
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Chang-Qi Li
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha, China
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Iazeva EG, Legostaeva LA, Bakulin IS, Poydasheva AG, Abaimov DA, Suponeva NA, Shabalina AA, Ryabinkina Y, Piradov MA. Effect of neuromodulation on neurotrophic factors in patients with chronic disorders of consciousness. BULLETIN OF RUSSIAN STATE MEDICAL UNIVERSITY 2020. [DOI: 10.24075/brsmu.2020.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Transcranial magnetic stimulation (TMS) is one of rehabilitation approaches for patients with chronic disorders of consciousness (DOC). The aim of our study was to assess neurotrophic factors and the changes of those after TMS course in patients with chronic DOC. We enrolled 26 patients with chronic DOC of various etiology and 21 heathy volunteers. Blood serum and cerebrospinal fluid (CSF) were collected from all patients before and after the TMS course, the levels of BDNF, NSE, NGF, РDGF, GDNF and NT3 were assessed in the biomaterial. The blood BDNF, NSE, PDGF, GDNF and NT3 in patients with chronic DOC were higher compared to healthy volunteers (p < 0.05). We found no correlations between the type of DOC and neurotrophic factors concentrations in blood and CSF. The CSF level of BDNF in patients after traumatic brain injury (TBI) was higher compared to patients with non-traumatic chronic DOC (p < 0.05). We also found the increase of CSF BDNF after the TMS course in patients after TBI (p < 0.05). No other significant differences between groups and another blood and cerebrospinal fluid biomarker levels were detected. Thus, the serum BDNF, NSE, PDGF, GDNF and NT3 levels in patients with chronic DOC were higher compared to healthy volunteers. The BDNF level in CSF was higher in patients with traumatic DOC, and it also increased after the course of high-frequency TMS in this group. This fact may indicate the long-term neuronal plasticity processes in patients after TBI, as well as more favorable rehabilitation prognosis.
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Affiliation(s)
- EG Iazeva
- Research Center of Neurology, Moscow, Russia
| | | | - IS Bakulin
- Research Center of Neurology, Moscow, Russia
| | | | - DA Abaimov
- Research Center of Neurology, Moscow, Russia
| | - NA Suponeva
- Research Center of Neurology, Moscow, Russia
| | | | | | - MA Piradov
- Research Center of Neurology, Moscow, Russia
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4
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Wyrobek J, LaFlam A, Max L, Tian J, Neufeld KJ, Kebaish KM, Walston JD, Hogue CW, Riley LH, Everett AD, Brown CH. Association of intraoperative changes in brain-derived neurotrophic factor and postoperative delirium in older adults. Br J Anaesth 2018; 119:324-332. [PMID: 28854532 DOI: 10.1093/bja/aex103] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/23/2017] [Indexed: 01/19/2023] Open
Abstract
Background Delirium is common after surgery, although the aetiology is poorly defined. Brain-derived neurotrophic factor (BDNF) is a neurotrophin important in neurotransmission and neuroplasticity. Decreased levels of BDNF have been associated with poor cognitive outcomes, but few studies have characterized the role of BDNF perioperatively. We hypothesized that intraoperative decreases in BDNF levels are associated with postoperative delirium. Methods Patients undergoing spine surgery were enrolled in a prospective cohort study. Plasma BDNF was collected at baseline and at least hourly intraoperatively. Delirium was assessed using rigorous methods, including the Confusion Assessment Method (CAM) and CAM for the intensive care unit. Associations of changes in BDNF and delirium were examined using regression models. Results Postoperative delirium developed in 32 of 77 (42%) patients. The median baseline BDNF level was 7.6 ng ml -1 [interquartile range (IQR) 3.0-11.2] and generally declined intraoperatively [median decline 61% (IQR 31-80)]. There was no difference in baseline BDNF levels by delirium status. However, the percent decline in BDNF was greater in patients who developed delirium [median 74% (IQR 51-82)] vs in those who did not develop delirium [median 50% (IQR 14-79); P =0.03]. Each 1% decline in BDNF was associated with increased odds of delirium in unadjusted {odds ratio [OR] 1.02 [95% confidence interval (CI) 1.00-1.04]; P =0.01}, multivariable-adjusted [OR 1.02 (95% CI 1.00-1.03); P =0.03], and propensity score-adjusted models [OR 1.02 (95% CI 1.00-1.04); P =0.03]. Conclusions We observed an association between intraoperative decline in plasma BDNF and delirium. These preliminary results need to be confirmed but suggest that plasma BDNF levels may be a biomarker for postoperative delirium.
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Affiliation(s)
- J Wyrobek
- Department of Anesthesiology and Critical Care, Brigham and Women's Hospital, Boston, MA, USA
| | - A LaFlam
- Tufts University School of Medicine, Boston, MA, USA
| | - L Max
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - J Tian
- Department of Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
| | - K J Neufeld
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - K M Kebaish
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - J D Walston
- Department of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - C W Hogue
- Department of Anesthesiology and Critical Care Medicine, Northwestern Feinberg School of Medicine, Chicago, IL, USA
| | - L H Riley
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - A D Everett
- Department of Pediatrics, Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - C H Brown
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Hughes CG, Patel MB, Brummel NE, Thompson JL, McNeil JB, Pandharipande PP, Jackson JC, Chandrasekhar R, Ware LB, Ely EW, Girard TD. Relationships between markers of neurologic and endothelial injury during critical illness and long-term cognitive impairment and disability. Intensive Care Med 2018; 44:345-355. [PMID: 29523900 PMCID: PMC5870884 DOI: 10.1007/s00134-018-5120-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 02/28/2018] [Indexed: 12/13/2022]
Abstract
PURPOSE Neurologic and endothelial injury biomarkers are associated with prolonged delirium during critical illness and may reflect injury pathways that lead to poor long-term outcomes. We hypothesized that blood-brain barrier (BBB), neuronal, and endothelial injury biomarkers measured during critical illness are associated with cognitive impairment and disability after discharge. METHODS We enrolled adults with respiratory failure and/or shock and measured plasma concentrations of BBB (S100B), neuronal (UCHL1, BDNF), and endothelial (E-selectin, PAI-1) injury markers within 72 h of ICU admission. At 3 and 12 months post-discharge, we assessed participants' global cognition, executive function, and activities of daily living (ADL). We used multivariable regression to determine whether biomarkers were associated with outcomes after adjusting for relevant demographic and acute illness covariates. RESULTS Our study included 419 survivors of critical illness with median age 59 years and APACHE II score 25. Higher S100B was associated with worse global cognition at 3 and 12 months (P = 0.008; P = 0.01). UCHL1 was nonlinearly associated with global cognition at 3 months (P = 0.02). Higher E-selectin was associated with worse global cognition (P = 0.006 at 3 months; P = 0.06 at 12 months). BDNF and PAI-1 were not associated with global cognition. No biomarkers were associated with executive function. Higher S100B (P = 0.05) and E-selectin (P = 0.02) were associated with increased disability in ADLs at 3 months. CONCLUSIONS S100B, a marker of BBB and/or astrocyte injury, and E-selectin, an adhesion molecule and marker of endothelial injury, are associated with long-term cognitive impairment after critical illness, findings that may reflect mechanisms of critical illness brain injury.
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Affiliation(s)
- Christopher G Hughes
- Department of Anesthesiology, Division of Anesthesiology Critical Care Medicine and Center for Health Services Research, Vanderbilt University Medical Center, Nashville, USA.
- Nashville Veterans Affairs Medical Center, Tennessee Valley Healthcare System, Nashville, USA.
| | - Mayur B Patel
- Section of Surgical Sciences, Departments of Surgery, Neurosurgery and Hearing and Speech Sciences, Division of Trauma and Surgical Critical Care, Vanderbilt Brain Institute, Center for Health Services Research, Vanderbilt University Medical Center, Nashville, USA
- Nashville Veterans Affairs Medical Center, Tennessee Valley Healthcare System, Nashville, USA
| | - Nathan E Brummel
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, USA
| | - Jennifer L Thompson
- Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, USA
| | - J Brennan McNeil
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, USA
| | - Pratik P Pandharipande
- Departments of Anesthesiology and Surgery, Division of Anesthesiology Critical Care Medicine, Vanderbilt University Medical Center, Nashville, USA
- Nashville Veterans Affairs Medical Center, Tennessee Valley Healthcare System, Nashville, USA
| | - James C Jackson
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine and Center for Health Services Research, Vanderbilt University Medical Center, Nashville, USA
- Research Service, Nashville Veterans Affairs Medical Center, Tennessee Valley Healthcare System, Nashville, USA
| | - Rameela Chandrasekhar
- Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, USA
| | - Lorraine B Ware
- Departments of Medicine and Pathology, Microbiology and Immunology, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, USA
| | - E Wesley Ely
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine and Center for Health Services Research, Vanderbilt University Medical Center, Nashville, USA
- Geriatric Research, Education and Clinical Center Service, Nashville Veterans Affairs Medical Center, Tennessee Valley Healthcare System, Nashville, USA
| | - Timothy D Girard
- Department of Critical Care Medicine and Clinical Research, Investigation and Systems Modeling of Acute Illnesses Center, University of Pittsburgh, Pittsburgh, USA
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Li Y, Yu ZX, Ji MS, Yan J, Cai Y, Liu J, Yang HF, Jin ZC. A Pilot Study of the Use of Dexmedetomidine for the Control of Delirium by Reducing the Serum Concentrations of Brain-Derived Neurotrophic Factor, Neuron-Specific Enolase, and S100B in Polytrauma Patients. J Intensive Care Med 2017; 34:674-681. [PMID: 28569132 DOI: 10.1177/0885066617710643] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Delirium is very common among patients with polytrauma, although no suitable means exist to feasibly reduce the incidence and duration of delirium in these patients. Recent reports have suggested that continuous intravenous (IV) infusions of dexmedetomidine, rather than benzodiazepine, be administered for sedation to reduce the duration of delirium in this population. However, serum neuron-specific enolase (NSE), S100 calcium binding protein B (S100B), and brain-derived neurotrophic factor (BDNF) levels have not yet been investigated in polytrauma patients who received sedation with dexmedetomidine rather than other conventional sedatives. The aim of this study was to assess the association of blood BDNF, NSE, and S100B with the occurrence of delirium among polytrauma patients who had been sedated with dexmedetomidine. MATERIALS AND METHODS Consecutive patients were randomly assigned to 1 of 2 treatment study groups, namely the "dexmedetomidine group" or the "common group." This case-control study included 18 patients with delirium and 34 matched controls in a 63-bed general intensive care unit (ICU). Blood samples were collected from all patients upon ICU admission, on the day when delirium was diagnosed, and on days 3 and 5 following diagnosis. The serum levels of S100B, BDNF, and NSE were determined by enzyme-linked immunosorbent assay. The sedation levels and delirium were assessed using the Richmond Agitation and Sedation Scale and the Confusion Assessment Method for the ICU. RESULTS The median BDNF, NSE, and S100B concentrations were significantly lower in the dexmedetomidine group than in the common group on the day when delirium was diagnosed and on the third day after delirium was diagnosed. The rate of delirium was significantly lower in the dexmedetomidine group than in the common group. There were clear differences in the BDNF, NSE, and S100B levels between the 2 groups on the fifth day after delirium was diagnosed. CONCLUSIONS Our randomized controlled study suggests that the sedation of polytrauma patients with dexmedetomidine could help reduce the serum BDNF, S100B, and NSE levels, which appear to be associated with the occurrence of delirium in the dexmedetomidine group.
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Affiliation(s)
- Yong Li
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Zhi-Xin Yu
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Mu-Sen Ji
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Jun Yan
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Yan Cai
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Jing Liu
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Hong-Feng Yang
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Zhao-Chen Jin
- 1 Critical Care Medicine Unit, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
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The Association of Serum Levels of Brain-Derived Neurotrophic Factor with the Occurrence of and Recovery from Delirium in Older Medical Inpatients. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5271395. [PMID: 28280733 PMCID: PMC5322436 DOI: 10.1155/2017/5271395] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/18/2017] [Indexed: 12/20/2022]
Abstract
Limited studies of the association between BDNF levels and delirium have given inconclusive results. This prospective, longitudinal study examined the relationship between BDNF levels and the occurrence of and recovery from delirium. Participants were assessed twice weekly using MoCA, DRS-R98, and APACHE II scales. BDNF levels were estimated using an ELISA method. Delirium was defined with DRS-R98 (score > 16) and recovery from delirium as ≥2 consecutive assessments without delirium prior to discharge. We identified no difference in BDNF levels between those with and without delirium. Excluding those who never developed delirium (n = 140), we examined the association of BDNF levels and other variables with delirium recovery. Of 58 who experienced delirium, 39 remained delirious while 19 recovered. Using Generalized Estimating Equations models we found that BDNF levels (Wald χ2 = 7.155; df: 1, p = 0.007) and MoCA (Wald χ2 = 4.933; df: 1, p = 0.026) were associated with recovery. No significant association was found for APACHE II, dementia, age, or gender. BDNF levels do not appear to be directly linked to the occurrence of delirium but recovery was less likely in those with continuously lower levels. No previous study has investigated the role of BDNF in delirium recovery and these findings warrant replication in other populations.
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Abstract
PURPOSE OF REVIEW There is an urgent need for effective therapies to restore neurologic function and decrease disability following traumatic brain injury (TBI). Here, emerging findings on the mechanisms of post-TBI neural repair and regeneration, as well as therapeutic implications, are selectively reviewed. RECENT FINDINGS Recent discoveries include the characterization of the inhibitory signaling systems within the injury site, postinjury stem cell niche activation, the role of serotonin signaling in repair, and environment enrichment. A potentially transformative finding has been the identification of exosomes, nano-sized extracellular vesicles which have key roles in cell signaling, and might serve as novel biomarkers and as vehicles for targeted delivery of repair-inducing molecules. SUMMARY In the experimental setting, post-TBI repair can be promoted by modulation of inhibitory signaling, neurotrophic factor administration, and amplified serotonin signaling; additional strategies include mobilization of endogenous stem cell populations, exogenous cell-based therapies, and environmental enhancement. Feasibility, safety, and efficacy of these approaches need further investigation in humans. Studies are also needed to evaluate biomarkers based on molecular traces of neural repair and regeneration, which could transform prognostic and predictive modeling of post-TBI recovery trajectories.
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Brum C, Stertz L, Borba E, Rumi D, Kapczinski F, Camozzato A. Association of serum brain-derived neurotrophic factor (BDNF) and tumor necrosis factor-alpha (TNF-α) with diagnosis of delirium in oncology inpatients. ACTA ACUST UNITED AC 2016; 37:197-202. [PMID: 26376051 DOI: 10.1590/1516-4446-2014-1450] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE To evaluate brain-derived neurotrophic factor (BDNF) and tumor necrosis factor-α (TNF-α) blood levels as disease biomarkers of delirium in oncology inpatients. METHODS Seventeen oncology inpatients with delirium, 28 oncology inpatients without delirium, and 25 non-oncology controls (caregivers) were consecutively recruited from a Brazilian cancer center. This sample was matched by age, sex, and education level. The Confusion Assessment Method, the Mini-Mental State Examination, and the Digit Span Test were administered to ascertain delirium diagnosis. BDNF and TNF-α levels were measured by the Sandwich-ELISA method and flow cytometry, respectively. Blood samples were collected immediately after clinical evaluation. RESULTS Oncology inpatients (with and without delirium) showed significantly lower BDNF levels compared with non-oncology controls (F = 13.830; p = 0.001). TNF-α levels did not differ between the three groups. CONCLUSION A cross-sectional relationship of BDNF and TNF-α blood levels with delirium in oncology inpatients was not demonstrated. The association between cancer and reduced serum BDNF levels may be mediated by confounding factors.
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Affiliation(s)
- Cristiano Brum
- Graduate Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, BR
| | - Laura Stertz
- Molecular Psychiatry Laboratory, National Science and Technology Institute for Translational Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR
| | - Ericksen Borba
- Graduate Program in Medical Sciences, UFRGS, Porto Alegre, RS, BR
| | | | - Flávio Kapczinski
- Molecular Psychiatry Laboratory, National Science and Technology Institute for Translational Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR
| | - Analuiza Camozzato
- Graduate Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, BR
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10
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Biomarkers of Delirium in a Low-Risk Community-Acquired Pneumonia-Induced Sepsis. Mol Neurobiol 2016; 54:722-726. [DOI: 10.1007/s12035-016-9708-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 01/07/2016] [Indexed: 11/26/2022]
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11
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Failla MD, Conley YP, Wagner AK. Brain-Derived Neurotrophic Factor (BDNF) in Traumatic Brain Injury-Related Mortality: Interrelationships Between Genetics and Acute Systemic and Central Nervous System BDNF Profiles. Neurorehabil Neural Repair 2015; 30:83-93. [PMID: 25979196 DOI: 10.1177/1545968315586465] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Older adults have higher mortality rates after severe traumatic brain injury (TBI) compared to younger adults. Brain-derived neurotrophic factor (BDNF) signaling is altered in aging and is important to TBI given its role in neuronal survival/plasticity and autonomic function. Following experimental TBI, acute BDNF administration has not been efficacious. Clinically, genetic variation in BDNF (reduced signaling alleles: rs6265, Met-carriers; rs7124442, C-carriers) can be protective against acute mortality. Postacutely, these genotypes carry lower mortality risk in older adults and greater mortality risk among younger adults. OBJECTIVE Investigate BDNF levels in mortality/outcome following severe TBI in the context of age and genetic risk. METHODS Cerebrospinal fluid (CSF) and serum BDNF were assessed prospectively during the first week following severe TBI (n = 203) and in controls (n = 10). Age, BDNF genotype, and BDNF levels were assessed as mortality/outcome predictors. RESULTS CSF BDNF levels tended to be higher post-TBI (P = .061) versus controls and were associated with time until death (P = .042). In contrast, serum BDNF levels were reduced post-TBI versus controls (P < .0001). Both gene * BDNF serum and gene * age interactions were mortality predictors post-TBI in the same multivariate model. CSF and serum BDNF tended to be negatively correlated post-TBI (P = .07). CONCLUSIONS BDNF levels predicted mortality, in addition to gene * age interactions, suggesting levels capture additional mortality risk. Higher CSF BDNF post-TBI may be detrimental due to injury and age-related increases in pro-apoptotic BDNF target receptors. Negative CSF and serum BDNF correlations post-TBI suggest blood-brain barrier transit alterations. Understanding BDNF signaling in neuronal survival, plasticity, and autonomic function may inform treatment.
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Affiliation(s)
- Michelle D Failla
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yvette P Conley
- Department of Human Genetics, School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA Health Promotion & Development, School of Nursing, University of Pittsburgh, Pittsburgh, PA, USA Department of Physical Medicine and Rehabilitation, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Amy K Wagner
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA Department of Physical Medicine and Rehabilitation, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA
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12
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Papathanassoglou EDE, Miltiadous P, Karanikola MN. May BDNF Be Implicated in the Exercise-Mediated Regulation of Inflammation? Critical Review and Synthesis of Evidence. Biol Res Nurs 2014; 17:521-39. [DOI: 10.1177/1099800414555411] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Introduction: Exercise attenuates inflammation and enhances levels of brain-derived neurotrophic factor (BDNF). Exercise also enhances parasympathetic tone, although its role in activating the cholinergic anti-inflammatory pathway is unclear. The physiological pathways of exercise’s effect on inflammation are obscure. Aims: To critically review the evidence on the role of BDNF in the anti-inflammatory effects of exercise and its potential involvement in the cholinergic anti-inflammatory pathway. Methods: Critical literature review of studies published in MEDLINE, PubMed, CINAHL, Embase, and Cochrane databases. Results: BDNF is critically involved in the bidirectional signaling between immune and neurosensory cells and in the regulation of parasympathetic system responses. BDNF is also intricately involved in the inflammatory response: inflammation induces BDNF production, and, in turn, BDNF exerts pro- and/or anti-inflammatory effects. Although exercise modulates BDNF and its receptors in lymphocytes, data on BDNF’s immunoregulatory/anti-inflammatory effects in relation to exercise are scarce. Moreover, BDNF increases cholinergic activity and is modulated by parasympathetic system activation. However, its involvement in the cholinergic anti-inflammatory pathway has not been investigated. Conclusion: Converging lines of evidence implicate BDNF in exercise-mediated regulation of inflammation; however, data are insufficient to draw concrete conclusions. We suggest that there is a need to investigate BDNF as a potential modulator/mediator of the anti-inflammatory effects of exercise and of the cholinergic anti-inflammatory pathway during exercise. Such research would have implications for a wide range of inflammatory diseases and for planning targeted exercise protocols.
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Failla MD, Kumar RG, Peitzman AB, Conley YP, Ferrell RE, Wagner AK. Variation in the BDNF gene interacts with age to predict mortality in a prospective, longitudinal cohort with severe TBI. Neurorehabil Neural Repair 2014; 29:234-46. [PMID: 25063686 DOI: 10.1177/1545968314542617] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Mortality predictions following traumatic brain injury (TBI), and our understanding of TBI pathology, may be improved by including genetic risk in addition to traditional prognostic variables. One promising target is the gene coding for brain-derived neurotrophic factor (BDNF), a ubiquitous neurotrophin important for neuronal survival and neurogenesis. OBJECTIVE We hypothesized the addition of BDNF genetic variation would improve mortality prediction models and that BDNF Met-carriers (rs6265) and C-carriers (rs7124442) would have the highest mortality rates post-TBI. METHODS This study examined BDNF functional single nucleotide polymorphisms rs6265 (val66met) and rs7124442 (T>C) in relation to mortality in a prospective, longitudinal cohort with severe TBI. We examined 315 individuals receiving care for a closed head injury within the University of Pittsburgh Medical Center, aged 16 to 74 years. Mortality was examined acutely (0-7 days postinjury) and postacutely (8-365 days postinjury). A gene risk score (GRS) was developed to examine both BDNF loci. Cox proportional hazards models were used to calculate hazard ratios for survivability post-TBI while controlling for covariates. RESULTS BDNF GRS was significantly associated with acute mortality, regardless of age. Interestingly, subjects in the hypothesized no-risk allele group had the lowest survival probability. Postacutely, BDNF-GRS interacted with age such that younger participants in the no-risk group had the highest survival probability, while older participants in the hypothesized no-risk group had the lowest probability of survival. CONCLUSIONS These data suggest complex relationships between BDNF and TBI mortality that interact with age to influence survival predictions beyond clinical variables alone. Evidence supporting dynamic, temporal balances of pro-survival/pro-apoptotic target receptors may explain injury and age-related gene associations.
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Affiliation(s)
- Michelle D Failla
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, School of Medicine, Pittsburgh PA Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA
| | - Raj G Kumar
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, School of Medicine, Pittsburgh PA
| | - Andrew B Peitzman
- Department of Surgery, University of Pittsburgh, School of Medicine, Pittsburgh PA
| | - Yvette P Conley
- Department of Health Promotion & Development, University of Pittsburgh, School of Nursing, Pittsburgh, PA
| | - Robert E Ferrell
- Department of Human Genetics, University of Pittsburgh, School of Public Health, Pittsburgh, PA
| | - Amy K Wagner
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, School of Medicine, Pittsburgh PA Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA Safar Center for Resuscitation Research, University Pittsburgh, Pittsburgh, PA
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