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Hendrick J, Ma JZ, Haughey HM, Coleman R, Nayak U, Kadl A, Sturek JM, Jackson P, Young MK, Allen JE, Petri WA. Pulmonary Function and Survival 1 Year After Dupilumab Treatment of Acute Moderate to Severe Coronavirus Disease 2019: A Follow-up Study From a Phase 2a Trial. Open Forum Infect Dis 2024; 11:ofad630. [PMID: 38312212 PMCID: PMC10834240 DOI: 10.1093/ofid/ofad630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 01/02/2024] [Indexed: 02/06/2024] Open
Abstract
Background We previously conducted a phase 2a randomized placebo-controlled trial of 40 subjects to assess the efficacy and safety of dupilumab use in people hospitalized with coronavirus disease 2019 (COVID-19) (NCT04920916). Based on our preclinical data suggesting that downstream pulmonary dysfunction with COVID-19 induced type 2 inflammation, we contacted patients from our phase 2a study at 1 year for assessment of post-COVID-19 conditions. Methods Subjects at 1 year after treatment underwent pulmonary function tests, high-resolution computed tomographic imaging, symptom questionnaires, neurocognitive assessments, and serum immune biomarker analysis, with subject survival also monitored. The primary outcome was the proportion of abnormal diffusion capacity for carbon monoxide (DLCO) or 6-minute walk test (6MWT) at the 1-year visit. Results Of those survivors who consented to 1-year visits (n = 16), subjects who had originally received dupilumab were less likely than those who received placebo to have an abnormal DLCO or 6MWT (Fisher exact P = .011; adjusted P = .058). As a secondary endpoint, we saw that 16% of subjects in the dupilumab group died by 1 year compared to 38% in the placebo group, though this was not statistically significant (log-rank P = .12). We did not find significant differences in neurocognitive testing, symptoms, or chest computed tomography between treatment groups but observed a larger reduction in eotaxin levels in those who received dupilumab. Conclusions In this observational study, subjects who received dupilumab during acute COVID-19 hospitalization were less likely to have a reduced DLCO or 6MWT, with a nonsignificant trend toward reduced mortality at 1 year compared to placebo.
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Affiliation(s)
- Jennifer Hendrick
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Jennie Z Ma
- Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Heather M Haughey
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Rachael Coleman
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Uma Nayak
- Center for Public Health Genomics and Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Alexandra Kadl
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Jeffrey M Sturek
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Patrick Jackson
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Mary K Young
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Judith E Allen
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, University of Manchester, Manchester Academic Health Sciences Centre, Manchester, United Kingdom
| | - William A Petri
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
- Department of Pathology, University of Virginia Health System, Charlottesville, Virginia, USA
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2
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Hendrick J, Ma JZ, Haughey HM, Coleman R, Nayak U, Kadl A, Sturek JM, Jackson P, Young MK, Allen JE, Petri WA. Pulmonary function and survival one year after dupilumab treatment of acute moderate to severe COVID-19: A follow up study from a Phase IIa trial. medRxiv 2023:2023.09.01.23293947. [PMID: 37693596 PMCID: PMC10491385 DOI: 10.1101/2023.09.01.23293947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Background We previously conducted a Phase IIa randomized placebo-controlled trial of 40 subjects to assess the efficacy and safety of dupilumab use in those hospitalized with COVID-19 (NCT04920916). Based on our pre-clinical data suggesting downstream pulmonary dysfunction with COVID-19 induced type 2 inflammation, we contacted patients from our Phase IIa study at 1 year for assessment of Post Covid-19 Conditions (PCC). Methods Subjects at 1 year after treatment underwent pulmonary function testing (PFTs), high resolution computed tomography (HRCT) imaging, symptom questionnaires, neurocognitive assessments, and serum immune biomarker analysis, with subject survival also monitored. The primary outcome was the proportion of abnormal PFTs, defined as an abnormal diffusion capacity for carbon monoxide (DLCO) or 6-minute walk testing (6MWT) at the 1-year visit. Results Sixteen of the 29 one-year survivors consented to the follow up visit. We found that subjects who had originally received dupilumab were less likely to have abnormal PFTs compared to those who received placebo (Fisher's exact p=0.011, adjusted p=0.058). We additionally found that 3 out of 19 subjects (16%) in the dupilumab group died by 1 year compared to 8 out of 21 subjects (38%) in the placebo group (log rank p=0.12). We did not find significant differences in neurocognitive testing, symptoms or CT chest imaging between treatment groups but observed evidence of reduced type 2 inflammation in those who received dupilumab. Conclusions We observed evidence of reduced long-term morbidity and mortality from COVID-19 with dupilumab treatment during acute hospitalization when added to standard of care regimens.
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Affiliation(s)
- Jennifer Hendrick
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Jennie Z. Ma
- Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Heather M. Haughey
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Rachael Coleman
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Uma Nayak
- Center for Public Health Genomics and Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Alexandra Kadl
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Jeffrey M. Sturek
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Patrick Jackson
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Mary K. Young
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Judith E. Allen
- Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, University of Manchester, Manchester Academic Health Sciences Centre, Manchester, United Kingdom
| | - William A. Petri
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Pathology, University of Virginia Health System, Charlottesville, VA, USA
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Arteaga DF, Ulep R, Kumar KK, Southerland AM, Conaway MR, Faber J, Wintermark M, Joyner D, Sharashidze V, Hirsch K, Giurgiutiu DV, Hannawi Y, Aziz Y, Shutter L, Visweswaran A, Williams A, Williams K, Gunter S, Haughey HM, Bruno A, Johnston KC, Patel VN. Collateral status, hyperglycemia, and functional outcome after acute ischemic stroke. BMC Neurol 2022; 22:408. [PMID: 36333676 PMCID: PMC9635077 DOI: 10.1186/s12883-022-02943-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Mixed data exist regarding the association between hyperglycemia and functional outcome after acute ischemic stroke when accounting for the impact of leptomeningeal collateral flow. We sought to determine whether collateral status modifies the association between treatment group and functional outcome in a subset of patients with large vessel occlusion enrolled in the Stroke Hyperglycemia Insulin Network Effort (SHINE) trial. METHODS In this post-hoc analysis, we analyzed patients enrolled into the SHINE trial with anterior circulation large vessel occlusion who underwent imaging with CT angiography prior to glucose control treatment group assignment. The primary analysis assessed the degree to which collateral status modified the effect between treatment group and functional outcome as defined by the 90-day modified Rankin Scale score. Logistic regression was used to model the data, with adjustments made for thrombectomy status, age, post-perfusion thrombolysis in cerebral infarction (TICI) score, tissue plasminogen activator (tPA) use, and baseline National Institutes of Health Stroke Scale (NIHSS) score. Five SHINE trial centers contributed data for this analysis. Statistical significance was defined as a p-value < 0.05. RESULTS Among the 1151 patients in the SHINE trial, 57 with angiographic data were included in this sub-analysis, of whom 19 had poor collaterals and 38 had good collaterals. While collateral status had no effect (p = 0.855) on the association between glucose control treatment group and functional outcome, patients with good collaterals were more likely to have a favorable functional outcome (p = 0.001, OR 5.02; 95% CI 1.37-16.0). CONCLUSIONS In a post-hoc analysis using a subset of patients with angiographic data enrolled in the SHINE trial, collateral status did not modify the association between glucose control treatment group and functional outcome. However, consistent with prior studies, there was a significant association between good collateral status and favorable outcome in patients with large vessel occlusion stroke. TRIAL REGISTRATION ClinicalTrials.gov Identifier is NCT01369069. Registration date is June 8, 2011.
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Affiliation(s)
- Daniel F. Arteaga
- grid.461421.40000 0004 0435 9205Department Neurology, St Thomas Rutherford Hospital, Murfreesboro, 1700 Medical Center Pkwy, Murfreesboro, TN 37129 USA
| | - Robin Ulep
- grid.168010.e0000000419368956Department of Neurology, Stanford University, Stanford, CA USA
| | - Kevin K. Kumar
- grid.168010.e0000000419368956Department of Neurosurgery, Stanford University, Stanford, CA USA
| | - Andrew M. Southerland
- grid.27755.320000 0000 9136 933XDepartment of Neurology, University of Virginia, Charlottesville, VA USA
| | - Mark R. Conaway
- grid.27755.320000 0000 9136 933XDepartment of Statistics, University of Virginia, Charlottesville, VA USA
| | - James Faber
- grid.410711.20000 0001 1034 1720Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, NC USA
| | - Max Wintermark
- grid.168010.e0000000419368956Department of Radiology, Stanford University, Stanford, CA USA
| | - David Joyner
- grid.27755.320000 0000 9136 933XDepartment of Radiology, University of Virginia, Charlottesville, VA USA
| | - Vera Sharashidze
- grid.189967.80000 0001 0941 6502Department of Neurology, Emory University, Atlanta, GA USA
| | - Karen Hirsch
- grid.168010.e0000000419368956Department of Neurology, Stanford University, Stanford, CA USA
| | - Dan-Victor Giurgiutiu
- grid.410427.40000 0001 2284 9329Department of Neurology, Medical College of Georgia at Augusta University, Augusta, GA USA
| | - Yousef Hannawi
- grid.261331.40000 0001 2285 7943Department of Neurology, The Ohio State University, Columbus, OH USA
| | - Yasmin Aziz
- grid.21925.3d0000 0004 1936 9000Department of Neurology, University of Pittsburgh, Pittsburgh, PA USA
| | - Lori Shutter
- grid.21925.3d0000 0004 1936 9000Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA USA
| | - Anita Visweswaran
- grid.168010.e0000000419368956Department of Neurology, Stanford University, Stanford, CA USA
| | - Alana Williams
- grid.189967.80000 0001 0941 6502Department of Neurology, Emory University, Atlanta, GA USA
| | - Kori Williams
- grid.410427.40000 0001 2284 9329Department of Neurology, Medical College of Georgia at Augusta University, Augusta, GA USA
| | - Sonya Gunter
- grid.27755.320000 0000 9136 933XDepartment of Neurology, University of Virginia, Charlottesville, VA USA
| | - Heather M. Haughey
- grid.27755.320000 0000 9136 933XDepartment of Neurology, University of Virginia, Charlottesville, VA USA
| | - Askiel Bruno
- grid.410427.40000 0001 2284 9329Department of Neurology, Medical College of Georgia at Augusta University, Augusta, GA USA
| | - Karen C. Johnston
- grid.27755.320000 0000 9136 933XDepartment of Neurology, University of Virginia, Charlottesville, VA USA
| | - Vishal N. Patel
- grid.189967.80000 0001 0941 6502Department of Neurology, Emory University, Atlanta, GA USA
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Sasson J, Donlan AN, Ma JZ, Haughey HM, Coleman R, Nayak U, Mathers AJ, Laverdure S, Dewar R, Jackson PEH, Heysell SK, Sturek JM, Petri WA. Safety and Efficacy of Dupilumab for the Treatment of Hospitalized Patients With Moderate to Severe Coronavirus Disease 2019: A Phase 2a Trial. Open Forum Infect Dis 2022; 9:ofac343. [PMID: 35959207 PMCID: PMC9361171 DOI: 10.1093/ofid/ofac343] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 07/25/2022] [Indexed: 12/15/2022] Open
Abstract
Background Based on studies implicating the type 2 cytokine interleukin 13 (IL-13) as a potential contributor to critical coronavirus disease 2019 (COVID-19), this trial was designed as an early phase 2 study to assess dupilumab, a monoclonal antibody that blocks IL-13 and interleukin 4 signaling, for treatment of inpatients with COVID-19. Methods We conducted a phase 2a randomized, double-blind, placebo-controlled trial (NCT04920916) to assess the safety and efficacy of dupilumab plus standard of care vs placebo plus standard of care in mitigating respiratory failure and death in those hospitalized with COVID-19. Results Forty eligible subjects were enrolled from June to November of 2021. There was no statistically significant difference in adverse events nor in the primary endpoint of ventilator-free survival at day 28 between study arms. However, for the secondary endpoint of mortality at day 60, there were 2 deaths in the dupilumab group compared with 5 deaths in the placebo group (60-day survival: 89.5% vs 76.2%; adjusted hazard ratio [HR], 0.05 [95% confidence interval {CI}, .004-.72]; P = .03). Among subjects who were not in the intensive care unit (ICU) at randomization, 3 subjects in the dupilumab arm were admitted to the ICU compared to 6 in the placebo arm (17.7% vs 37.5%; adjusted HR, 0.44 [95% CI, .09-2.09]; P = .30). Last, we found evidence of type 2 signaling blockade in the dupilumab group through analysis of immune biomarkers over time. Conclusions Although the primary outcome of day 28 ventilator-free survival was not reached, adverse events were not observed and survival was higher in the dupilumab group by day 60. Clinical Trials Registration NCT04920916.
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Affiliation(s)
- Jennifer Sasson
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Alexandra N Donlan
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Jennie Z Ma
- Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Heather M Haughey
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Rachael Coleman
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Uma Nayak
- Center for Public Health Genomics and Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Amy J Mathers
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
- Department of Pathology, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Sylvain Laverdure
- Laboratory of Human Retrovirology and Immunoinformatics, Frederick National Laboratory, Frederick, Maryland, USA
| | - Robin Dewar
- Virus Isolation and Serology Laboratory, Frederick National Laboratory, Frederick, Maryland, USA
| | - Patrick E H Jackson
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Scott K Heysell
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Jeffrey M Sturek
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA
| | - William A Petri
- Correspondence: William A. Petri Jr., MD, PhD, University of Virginia, 345 Crispell Drive, Charlottesville, VA 22908-1340, USA ()
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Bruno A, Paletta N, Verma U, Grabowska ME, Haughey HM, Batchala PP, Abay S, Donahue J, Vender J, Sethuraman S, Nichols FT. Predicting Functional Outcome After Decompressive Craniectomy for Malignant Hemispheric Infarction: Clinical and Novel Imaging Factors. World Neurosurg 2021; 158:e1017-e1021. [PMID: 34906752 DOI: 10.1016/j.wneu.2021.12.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Decompressive craniectomy (DC) is an established optional treatment for malignant hemispheric infarction (MHI). We analyzed relevant clinical factors and computed tomography (CT) measurements in patients with DC for MHI to identify predictors of functional outcome 3-6 months after stroke. METHODS This study was performed at 2 comprehensive stroke centers. The inclusion criteria required DC for MHI, no additional intraoperative procedures (strokectomy or cerebral ventricular drain placement), and documented functional status 3-6 months after the stroke. We classified functional outcome as acceptable if the modified Rankin Scale score was <5, or as unacceptable if it was 5 or 6 (bedbound and totally dependent on others or death). Multiple logistic regression analyzed relevant clinical factors and multiple perioperative CT measurements to identify predictors of acceptable functional outcome. RESULTS Of 87 identified consecutive patients, 66 met the inclusion criteria. Acceptable functional outcome occurred in 35 of 66 (53%) patients. Likelihood of acceptable functional outcome decreased significantly with increasing age (OR 0.92, 95% CI 0.82-0.97, P = 0.004) and with increasing post-DC midline brain shift (OR 0.78, 95% CI 0.64-0.96, P = 0.016), and decreased non-significantly with left-sided stroke (OR 0.30, 95% CI 0.08-1.10, P = 0.069) and with increasing craniectomy barrier thickness (OR 0.92, 95% CI 0.85-1.01, P = 0.076). CONCLUSIONS Patient age and the post-DC midline shift may be useful in prognosticating functional outcome after DC for MHI. Stroke side and craniectomy barrier thickness merit further ideally prospective outcome prediction testing.
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Affiliation(s)
- Askiel Bruno
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.
| | - Nina Paletta
- Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Uttam Verma
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Monika E Grabowska
- Department of Neurology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Heather M Haughey
- Department of Neurology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Prem P Batchala
- Department of Radiology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Solomon Abay
- Department of Radiology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Joseph Donahue
- Department of Radiology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - John Vender
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | | | - Fenwick T Nichols
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
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Bruno A, Paletta N, Verma U, Grabowska ME, Batchala PP, Abay S, Haughey HM, Donahue J, Vender J, Sethuraman S, Nichols FT. Limiting Brain Shift in Malignant Hemispheric Infarction by Decompressive Craniectomy. J Stroke Cerebrovasc Dis 2021; 30:105830. [PMID: 33945955 DOI: 10.1016/j.jstrokecerebrovasdis.2021.105830] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 03/15/2021] [Accepted: 04/11/2021] [Indexed: 10/21/2022] Open
Abstract
OBJECTIVE Decompressive craniectomy (DC) improves functional outcomes in selected patients with malignant hemispheric infarction (MHI), but variability in the surgical technique and occasional complications may be limiting the effectiveness of this procedure. Our aim was to evaluate predefined perioperative CT measurements for association with post-DC midline brain shift in patients with MHI. METHODS At two medical centers we identified 87 consecutive patients with MHI and DC between January 2007 and December 2019. We used our previously tested methods to measure the craniectomy surface area, extent of transcalvarial brain herniation, thickness of tissues overlying the craniectomy, diameter of the cerebral ventricle atrium contralateral to the stroke, extension of infarction beyond the craniectomy edges, and the pre and post-DC midline brain shifts. To avoid potential confounding from medical treatments and additional surgical procedures, we excluded patients with the first CT delayed >30 hours post-DC, resection of infarcted brain, or insertion of an external ventricular drain during DC. The primary outcome in multiple linear regression analysis was the postoperative midline brain shift. RESULTS We analyzed 72 qualified patients. The average midline brain shift decreased from 8.7 mm pre-DC to 5.4 post-DC. The only factors significantly associated with post-DC midline brain shift at the p<0.01 level were preoperative midline shift (coefficient 0.32, standard error 0.10, p=0.002) and extent of transcalvarial brain herniation (coefficient -0.20, standard error 0.05, p <0.001). CONCLUSIONS In patients with MHI and DC, smaller post-DC midline shift is associated with smaller pre-DC midline brain shift and greater transcalvarial brain herniation. This knowledge may prove helpful in assessing DC candidacy and surgical success. Additional studies to enhance the surgical success of DC are warranted.
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Affiliation(s)
- Askiel Bruno
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, 1120 15th Street BI3076, GA, United States.
| | - Nina Paletta
- Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Uttam Verma
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, 1120 15th Street BI3076, GA, United States
| | - Monika E Grabowska
- Department of Neurology, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Prem P Batchala
- Department of Radiology, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Solomon Abay
- Department of Radiology, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Heather M Haughey
- Department of Neurology, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Joseph Donahue
- Department of Radiology, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - John Vender
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Sankara Sethuraman
- Department of Mathematics, Augusta University, Augusta, GA, United States
| | - Fenwick T Nichols
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, 1120 15th Street BI3076, GA, United States
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Abstract
BACKGROUND Despite growing concern about the increased rates of synthetic cannabinoid (SC) use and their effects, only limited data are available that addresses these issues. This study assessed the extent of SC product use and reported effects among a cohort of adult marijuana and tobacco users. METHODS A brief telephone interview was conducted with individuals who had given permission to be contacted for future research while screening for a cannabis/nicotine dependence medication development study (NCT01204723). RESULTS Respondents (N = 42; 88% participation rate) were primarily young adults, male, racially diverse, and high school graduates. Nearly all currently smoked tobacco and cannabis, with 86% smoking cannabis on 5 or more days per week. Nearly all (91%) were familiar with SC products, half (50%) reported smoking SC products previously, and a substantial minority (24%) reported current use (i.e., past month). Despite a federal ban on 5 common SCs, which went into effect on March 1, 2011, a number of respondents reported continued SC product use. Common reasons reported for use included, but were not limited to, seeking a new "high" similar to that produced by marijuana and avoiding drug use detection via a positive urine screen. The primary side effects were trouble thinking clearly, headache, dry mouth, and anxiety. No significant differences were found between synthetic cannabinoid product users (ever or current) and nonusers by demographics or other characteristics. CONCLUSIONS Among current marijuana and tobacco users, SC product consumption was common and persisted despite a federal ban. The primary reasons for the use of SC-containing products seem to be to evade drug detection and to experience a marijuana-like high.
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Affiliation(s)
- Erik W. Gunderson
- University of Virginia, Charlottesville, VA
- Columbia University, New York, NY
- Center for Wellness and Change, Charlottesville, VA
| | | | | | | | - Carl L. Hart
- Columbia University, New York, NY
- New York State Psychiatric Institute, NY, NY
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Johnson BA, Roache JD, Ait-Daoud N, Gunderson EW, Haughey HM, Wang XQ, Liu L. Topiramate's effects on cocaine-induced subjective mood, craving and preference for money over drug taking. Addict Biol 2013; 18:405-16. [PMID: 23039088 DOI: 10.1111/j.1369-1600.2012.00499.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Topiramate, presumably through antagonism of excitatory glutaminergic pathways and facilitation of inhibitory gamma-aminobutyric acid neurons in the cortico-mesolimbic system, might reduce cocaine's abuse liability. We tested whether topiramate (100 mg twice daily) would reduce the euphoria, subjective mood, craving and preference for cocaine over money induced by low and high doses (0.325 and 0.65 mg/kg i.v., respectively) of experimentally administered cocaine in 24 male and female, cocaine-dependent, non-treatment-seeking research volunteers in a university in-patient laboratory. We utilized a randomized, double-blind, placebo-controlled, within-subject, Latin-square cross-over design in which three experimental challenge doses of low-dose cocaine, high-dose cocaine and placebo were administered in counterbalanced order after 5 days of topiramate or matching placebo pre-treatments separated by a 1-week washout period (2006-2009). After placebo pre-treatments, cocaine produced dose-related increases in euphoria, stimulant effects, craving for more cocaine and monetary value of cocaine in a behavioral preference test of cocaine versus money choice. Topiramate pre-treatment reduced the cocaine-related craving and monetary value of high-dose cocaine while increasing the monetary value, euphoria and stimulant effects of low-dose cocaine. Validated and standardized human experimental methods evaluating the potential for topiramate to alter cocaine's abuse liability suggest that topiramate may reduce the reinforcing effects and craving induced by higher cocaine doses. Low-dose cocaine might appear to have some enhancement of its stimulant properties in the presence of topiramate's prominent sedative effects.
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Affiliation(s)
- Bankole A. Johnson
- Department of Psychiatry and Neurobehavioral Sciences; University of Virginia; Charlottesville; VA; USA
| | - John D. Roache
- Departments of Psychiatry and Pharmacology; University of Texas Health Science Center at San Antonio; San Antonio; TX; USA
| | - Nassima Ait-Daoud
- Department of Psychiatry and Neurobehavioral Sciences; University of Virginia; Charlottesville; VA; USA
| | | | - Heather M. Haughey
- Department of Psychiatry and Neurobehavioral Sciences; University of Virginia; Charlottesville; VA; USA
| | - Xin-Qun Wang
- Department of Public Health Sciences; University of Virginia; Charlottesville; VA; USA
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Gunderson EW, Haughey HM, Ait-Daoud N, Joshi AS, Hart CL. “Spice” and “K2” Herbal Highs: A Case Series and Systematic Review of the Clinical Effects and Biopsychosocial Implications of Synthetic Cannabinoid Use in Humans. Am J Addict 2012; 21:320-6. [DOI: 10.1111/j.1521-0391.2012.00240.x] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Haughey HM, Marshall E, Schacht JP, Louis A, Hutchison KE. Marijuana withdrawal and craving: influence of the cannabinoid receptor 1 (CNR1) and fatty acid amide hydrolase (FAAH) genes. Addiction 2008; 103:1678-86. [PMID: 18705688 PMCID: PMC2873690 DOI: 10.1111/j.1360-0443.2008.02292.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIM To examine whether withdrawal after abstinence and cue-elicited craving were associated with polymorphisms within two genes involved in regulating the endocannabinoid system, cannabinoid receptor 1 (CNR1) and fatty acid amide hydrolase (FAAH). Two single nucleotide polymorphisms (SNPs) in the CNR1 (rs2023239) and FAAH (rs324420) genes, associated previously with substance abuse and functional changes in cannabinoid regulation, were examined in a sample of daily marijuana smokers. PARTICIPANTS Participants were 105 students at the University of Colorado, Boulder between the ages of 18 and 25 years who reported smoking marijuana daily. MEASUREMENTS Participants were assessed once at baseline and again after 5 days of abstinence, during which they were exposed to a cue-elicited craving paradigm. Outcome measures were withdrawal and craving collected using self-reported questionnaires. In addition, urine samples were collected at baseline and on day 5 for the purposes of 11-nor-9-carboxy-Delta9-tetrahydrocannabinol (THC-COOH) metabolite analysis. FINDINGS Between the two sessions, THC-COOH metabolite levels decreased significantly, while measures of withdrawal and craving increased significantly. The CNR1 SNP displayed a significant abstinence x genotype interaction on withdrawal, as well as a main effect on overall levels of craving, while the FAAH SNP displayed a significant abstinence x genotype interaction on craving. CONCLUSIONS These genetic findings may have both etiological and treatment implications. However, longitudinal studies will be needed to clarify whether these genetic variations influence the trajectory of marijuana use/dependence. The identification of underlying genetic differences in phenotypes such as craving and withdrawal may aid genetically targeted approaches to the treatment of cannabis dependence.
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Haughey HM, Ray LA, Finan P, Villanueva R, Niculescu M, Hutchison KE. Human gamma-aminobutyric acid A receptor alpha2 gene moderates the acute effects of alcohol and brain mRNA expression. Genes Brain Behav 2007; 7:447-54. [PMID: 18005236 DOI: 10.1111/j.1601-183x.2007.00369.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Gamma-aminobutyric acid A (GABA(A)) receptors moderate several of the behavioral effects of alcohol. In fact, recent studies have shown an association between the gene for the alpha2-subunit of the GABA(A) receptor (GABRA2) and alcoholism. In the present study, we examined the functional relevance of the GABRA2 gene in alcohol dependence by assessing brain GABRA2 mRNA and GABA(A)alpha2-subunit protein levels in post-mortem prefrontal cortical tissue collected from control and alcohol-dependent individuals. In addition, using an endophenotype approach, we tested whether the GABRA2 gene moderates sensitivity to the acute effects of alcohol in two independent samples from distinct human alcohol challenge studies. Results indicated that GABRA2 mRNA levels significantly differed by GABRA2 genotype. GABRA2 single nucleotide polymorphisms (rs573400, rs279871 and rs279858) were significantly associated with sensitivity to the acute effects of alcohol. Specifically, there was a significant main effect of GABRA2 x breath alcohol concentration on several measures of subjective responses to alcohol, including the hedonic value of alcohol. Importantly, reanalysis of a previous intravenous alcohol administration study confirmed the results of the oral alcohol challenge study. In summary, these results extend previous findings and provide new insights into the putative biobehavioral mechanisms that may moderate the association between the GABRA2 gene, sensitivity to the acute effects of alcohol and ultimately alcohol dependence.
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Affiliation(s)
- H M Haughey
- University of Colorado at Boulder, Department of Psychology, Boulder, CO, USA.
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Frank MJ, Moustafa AA, Haughey HM, Curran T, Hutchison KE. Genetic triple dissociation reveals multiple roles for dopamine in reinforcement learning. Proc Natl Acad Sci U S A 2007; 104:16311-6. [PMID: 17913879 PMCID: PMC2042203 DOI: 10.1073/pnas.0706111104] [Citation(s) in RCA: 458] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Indexed: 11/18/2022] Open
Abstract
What are the genetic and neural components that support adaptive learning from positive and negative outcomes? Here, we show with genetic analyses that three independent dopaminergic mechanisms contribute to reward and avoidance learning in humans. A polymorphism in the DARPP-32 gene, associated with striatal dopamine function, predicted relatively better probabilistic reward learning. Conversely, the C957T polymorphism of the DRD2 gene, associated with striatal D2 receptor function, predicted the degree to which participants learned to avoid choices that had been probabilistically associated with negative outcomes. The Val/Met polymorphism of the COMT gene, associated with prefrontal cortical dopamine function, predicted participants' ability to rapidly adapt behavior on a trial-to-trial basis. These findings support a neurocomputational dissociation between striatal and prefrontal dopaminergic mechanisms in reinforcement learning. Computational maximum likelihood analyses reveal independent gene effects on three reinforcement learning parameters that can explain the observed dissociations.
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Affiliation(s)
- Michael J Frank
- Department of Psychology and Program in Neuroscience, University of Arizona, Tucson, AZ 85721, USA.
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Hutchison KE, Allen DL, Filbey FM, Jepson C, Lerman C, Benowitz NL, Stitzel J, Bryan A, McGeary J, Haughey HM. CHRNA4 and tobacco dependence: from gene regulation to treatment outcome. ACTA ACUST UNITED AC 2007; 64:1078-86. [PMID: 17768273 DOI: 10.1001/archpsyc.64.9.1078] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT Given the probable importance of the alpha4 subunit of the neuronal nicotinic acetylcholine receptor, the gene that codes for this subunit (CHRNA4) represents an excellent starting point for a genetic investigation of smoking behavior. OBJECTIVE To achieve a better understanding of the role of this gene in the cause and treatment of tobacco dependence, we adopted a transdisciplinary pharmacogenetic approach. DESIGN Study at the behavioral and clinical levels of analysis. SETTING Academic research. PARTICIPANTS Smokers (n = 316) between the ages of 18 and 50 years were recruited from the Denver, Colorado, metropolitan area. MAIN OUTCOME MEASURES Bioinformatics analyses, cell culture experiments, and analyses of CHRNA4 expression and nicotine binding in postmortem human brain tissue advanced 2 single-nucleotide polymorphisms (rs6122429 and rs2236196). RESULTS Both single-nucleotide polymorphisms were associated with subjective responses to smoking in the laboratory among 316 smokers. Likewise, among 353 participants in a clinical trial, rs2236196 was associated with smoking cessation outcomes. CONCLUSIONS Results of analyses ranging from basic biological approaches to clinical outcome data provide consistent evidence that 2 single-nucleotide polymorphisms in CHRNA4 are functional at a biological level and are associated with nicotine dependence phenotypes. This interdisciplinary approach to the genetics of nicotine dependence provides a model for testing how functional genetic variation is translated from changes in messenger RNA and protein to individual differences in behavior and treatment outcome.
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Affiliation(s)
- Kent E Hutchison
- Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309, USA.
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Haughey HM, Kaiser AL, Johnson TE, Bennett B, Sikela JM, Zahniser NR. Norepinephrine Transporter: A Candidate Gene for Initial Ethanol Sensitivity in Inbred Long-Sleep and Short-Sleep Mice. Alcohol Clin Exp Res 2005; 29:1759-68. [PMID: 16269905 DOI: 10.1097/01.alc.0000183009.57805.a6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Altered noradrenergic neurotransmission is associated with depression and may contribute to drug abuse and alcoholism. Differential initial sensitivity to ethanol is an important predictor of risk for future alcoholism, making the inbred long-sleep (ILS) and inbred short-sleep (ISS) mice a useful model for identifying genes that may contribute to alcoholism. METHODS In this study, molecular biological, neurochemical, and behavioral approaches were used to test the hypothesis that the norepinephrine transporter (NET) contributes to the differences in ethanol-induced loss of righting reflex (LORR) in ILS and ISS mice. RESULTS We used these mice to investigate the NET as a candidate gene contributing to this phenotype. The ILS and ISS mice carry different DNA haplotypes for NET, showing eight silent differences between allelic coding regions. Only the ILS haplotype is found in other mouse strains thus far sequenced. Brain regional analyses revealed that ILS mice have 30 to 50% lower [3H]NE uptake, NET binding, and NET mRNA levels than ISS mice. Maximal [3H]NE uptake and NET number were reduced, with no change in affinity, in the ILS mice. These neurobiological changes were associated with significant influences on the behavioral phenotype of these mice, as demonstrated by (1) a differential response in the duration of ethanol-induced LORR in ILS and ISS mice pretreated with a NET inhibitor and (2) increased ethanol-induced LORR in LXS recombinant inbred (RI) strains, homozygous for ILS in the NET chromosomal region (44-47 cM), compared with ISS homozygous strains. CONCLUSIONS This is the first report to suggest that the NET gene is one of many possible genetic factors influencing ethanol sensitivity in ILS, ISS, and LXS RI mouse strains.
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Affiliation(s)
- Heather M Haughey
- Department of Pharmacology, University of Colorado Health Sciences Center, Aurora, Colorado, USA.
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Hanania T, McCreary AC, Haughey HM, Salaz DO, Zahniser NR. MK-801- and ethanol-induced activity in inbred long-sleep and short-sleep mice: dopamine and serotonin systems. Eur J Pharmacol 2002; 457:125-35. [PMID: 12464358 DOI: 10.1016/s0014-2999(02)02685-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Low doses of (5R,10S)-(+)-5-methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5,10-imine (MK-801; dizocilpine) or ethanol induce less locomotor activation in inbred long-sleep (ILS) than short-sleep (ISS) mice. These differences may involve altered dopamine and/or 5-hydroxytryptamine (serotonin; 5-HT) neurotransmission. To address this possibility, the dopaminergic and serotonergic mechanisms underlying the locomotor-stimulant effects of MK-801 and ethanol in ILS and ISS mice were studied. Dopamine D1, D2 and 5-HT(2A) receptor antagonists reduced MK-801-stimulated activity in ILS mice without having any effect in ISS mice. The 5-HT reuptake inhibitor fluoxetine potentiated MK-801-stimulated activity selectively in ILS mice. Strain differences in 5-HT transporters do not explain this selective effect of fluoxetine in ILS mice since [3H]citalopram binding and [3H]5-HT uptake studies found no differences in the affinity, number or function of 5-HT transporters between ILS and ISS mice. Ethanol-induced activity in ISS mice was depressed by dopamine D2 and 5-HT(2C) receptor antagonists and enhanced by a 5-HT(1A) receptor antagonist. These results suggest that in ILS mice the locomotor-stimulant effects of MK-801 require increased dopamine and/or 5-HT neurotransmission. Conversely, in ISS mice, the effects of MK-801 appear to be monoamine-independent. Thus, even though both MK-801 and ethanol inhibit N-methyl-D-aspartate receptors, their stimulant effects appear to involve different neuronal systems.
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Affiliation(s)
- Taleen Hanania
- Department of Pharmacology C-236, University of Colorado Health Sciences Center, 4200 E. Ninth Avenue, Denver, CO 80262, USA.
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Metzger RR, Haughey HM, Wilkins DG, Gibb JW, Hanson GR, Fleckenstein AE. Methamphetamine-induced rapid decrease in dopamine transporter function: role of dopamine and hyperthermia. J Pharmacol Exp Ther 2000; 295:1077-85. [PMID: 11082443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Single and multiple high-dose administrations of methamphetamine (METH) differentially decrease dopamine (DA) transporter (DAT) function, as assessed by measuring [(3)H]DA uptake into rat striatal synaptosomes prepared 1 h after treatment. Prevention of METH-induced hyperthermia attenuated the decrease in DAT activity induced by multiple injections of the stimulant. Likewise, this decrease was attenuated by previous depletion of striatal DA levels using alpha-methyl-p-tyrosine (alphaMT) or pretreatment with the D1 and D2 antagonists SCH-23390 and eticlopride, respectively. However, METH-induced hyperthermia was also blocked by alphaMT and eticlopride. Reinstatement of hyperthermia to alphaMT- or eticlopride-pretreated rats partially restored the METH-induced decrease in DAT activity. In contrast, neither prevention of METH-induced hyperthermia depletion of DA, nor DA antagonists altered the decrease in DAT function induced by a single administration of METH. Pretreatment with the antioxidant N-t-butyl-alpha-phenylnitrone prevented part of the decrease in DAT function associated with multiple, but not a single, METH injections. Although not tested directly, additional data presented here suggest that the reduction in DAT activity induced by a single METH administration constitutes a part of the total reduction observed immediately after multiple administrations. Taken together, the results indicate that DA, hyperthermia, and oxygen radicals contribute to a component of the rapid decrease in DAT function induced by multiple injections of METH but do not appear to be associated with the reduction induced by a single administration of the stimulant.
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Affiliation(s)
- R R Metzger
- Program in Neuroscience, University of Utah, Salt Lake City, Utah 84112, USA
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Abstract
Multiple administrations of methamphetamine (METH) rapidly decreased serotonin (5HT) transporter (SERT) function in rat striatum and hippocampus. The purpose of this study was to identify the mechanisms/ factors contributing to this METH-induced decrease in SERT function. Multiple high-dose METH injections rapidly decreased 5HT uptake without altering binding of the 5HT transporter ligand paroxetine. Hyperthermia contributed to this deficit in transporter function in striatum and hippocampus, as prevention of METH-induced hyperthermia attenuated this decrease. A role for dopamine (DA) was suggested by findings that pretreatment with the tyrosine hydroxylase inhibitor alpha-methyl-p-tyrosine, the D1 antagonist SCH-23390, or the D2 antagonist eticlopride attenuated the METH-induced decrease in striatal, but not hippocampal, SERT activity. These effects were independent of the ability of these DA-antagonizing drugs to prevent METH-induced hyperthermia. These results suggest that DA contributes to the decrease in SERT function caused by multiple METH injections in the striatum, but not hippocampus, and that hyperthermia facilitates these deficits in SERT function in both brain regions. In contrast, the response of SERT to a single administration of METH was DA and hyperthermia independent. These findings suggest that the mechanisms/ factors involved in decreasing SERT activity after a single administration of METH are distinct from that caused by multiple administrations.
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Affiliation(s)
- H M Haughey
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah, USA
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Abstract
It has been demonstrated that methamphetamine (METH) administration affects Na(+)/Cl(-)-dependent transporters; for example, METH treatment rapidly and reversibly decreases dopamine (DA) and serotonin (5HT) transporter function in rat striatum in vivo, as assessed in synaptosomes prepared from METH-treated rats. Because acute effects of METH on other transporters within this family have been less studied, the responses of norepinephrine (NE) and gamma-aminobutyric acid (GABA) transporters to METH administration(s) were determined. Both single and multiple METH administrations inhibited hippocampal NE uptake 1 h after METH treatment(s). In contrast, striatal GABA uptake was not affected by either treatment paradigm. The effects observed after both single and multiple METH administrations on NE transporters were attributable to increases in K(m,) with no changes in V(max); effects that were eliminated by repeated washing of the synaptosomes. These 'washout' data suggest that residual METH introduced by the in vivo subcutaneous injection(s) directly reduced NE transporter activity in the in vitro assay and that, unlike DA and 5HT transporters, METH did not indirectly alter NE transporter function. Taken together, these data demonstrate differences in the responses of NE, GABA, DA, and 5HT transporters to METH treatment.
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Affiliation(s)
- H M Haughey
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, UT, USA
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Fleckenstein AE, Haughey HM, Metzger RR, Kokoshka JM, Riddle EL, Hanson JE, Gibb JW, Hanson GR. Differential effects of psychostimulants and related agents on dopaminergic and serotonergic transporter function. Eur J Pharmacol 1999; 382:45-9. [PMID: 10556503 DOI: 10.1016/s0014-2999(99)00588-9] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
High-dose administrations of amphetamine, methamphetamine, cathinone, methcathinone or methylenedioxymethamphetamine rapidly decrease dopamine and serotonin transporter function in vivo, as assessed in striatal synaptosomes obtained from drug-treated rats. In contrast, high-dose injections of fenfluramine, cocaine or methylphenidate had little or no effect on the activity of these transporters. Interestingly, the capacity of these agents to directly alter dopamine and serotonin uptake, as assessed in vitro by direct application to rat striatal synaptosomes, did not predict their potential to modulate transporter activity following in vivo administration. These findings demonstrate heretofore-unreported differences in the effects of these agents on monoamine transporter function, and a distinction between drug effects after direct application in vitro vs. administration in vivo.
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Affiliation(s)
- A E Fleckenstein
- Department of Pharmacology and Toxicology, University of Utah, 30 South 2000 East RM 201, Salt Lake City, UT, USA.
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Abstract
Incubation with the oxygen radical-generating enzyme, xanthine oxidase, dramatically reduced striatal dopamine transporter activity, but was unexpectedly without effect on rat hippocampal norepinephrine uptake. To determine whether environmental differences between the striatum and hippocampus contributed to this lack of oxidative effect on norepinephrine transporters, synaptosomal gamma-aminobutyric acid (GABA) uptake was assessed in both regions. Xanthine oxidase similarly decreased [3H]GABA uptake in both the striatum and hippocampus, supporting the conclusion that environmental differences did not account for the lack of effect on norepinephrine transport. These data suggest that norepinephrine transporters are less vulnerable than other Na+/Cl(-)-dependent transporters to oxidative inactivation.
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Affiliation(s)
- H M Haughey
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City 84112, USA
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Abstract
Administration of high doses of methamphetamine (METH) produces both short- and long-term enzymatic deficits in central monoaminergic systems. To determine whether a correlative relationship exists between these acute and long-term consequences of METH treatment, in the present study we examined the regional effects of METH on tryptophan hydroxylase (TPH) and tyrosine hydroxylase (TH) activities in various regions of the caudate nucleus, nucleus accumbens, and globus pallidus. A single METH administration decreased TPH activity 1 h after treatment in the globus pallidus, in the nucleus accumbens, and throughout the caudate; in the anterior caudate, the ventral-medial was more affected than the dorsal-lateral region. In contrast, TH activity was not decreased in either the caudate or the globus pallidus after a single METH administration; however, it was altered in the nucleus accumbens. Seven days after multiple METH administrations, TH and TPH activities were decreased in most caudate regions but not in the nucleus accumbens or globus pallidus. These data demonstrate that (1) the effects of METH on TPH and TH vary regionally; and (2) the short-term and long-term regional responses of TPH to METH in the caudate and globus pallidus correlated. In contrast, METH-induced acute TH responses did not predict the long-term changes in TH activity.
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Affiliation(s)
- H M Haughey
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City 84112, USA
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Matsumoto SS, Haughey HM, Schmehl DM, Venables DA, Ireland CM, Holden JA, Barrows LR. Makaluvamines vary in ability to induce dose-dependent DNA cleavage via topoisomerase II interaction. Anticancer Drugs 1999; 10:39-45. [PMID: 10194546 DOI: 10.1097/00001813-199901000-00006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The makaluvamines are marine natural products that were originally isolated because of their cytotoxicity in a cell-based mechanism screen. They have significant anti-cancer activity in animal models. There is, however, disagreement in the literature as to whether these compounds target topoisomerase II via a clinically relevant mechanism. This work shows that the makaluvamines can induce dose-dependent DNA cleavage via topoisomerase II. For most of the makaluvamines the levels of cleavage are significantly below those achieved by equimolar concentrations of etoposide. To some extent these results might explain the discrepancies present in the literature.
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Affiliation(s)
- S S Matsumoto
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City 84112, USA
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Abstract
Studies of the disposition of codeine into the hair of female subjects (n = 7) were performed after a multiple-dose protocol. Caucasian female subjects with dark-brown-to-black hair were administered a total dose of 450 mg codeine over 5 days (30 mg was administered three times a day for 5 days). Analyses of codeine and metabolites in plasma, urine, and hair were performed by positive ion chemical ionization gas chromatography-mass spectrometry (GC-MS) on a Finnigan Magnum" mass spectrometer. Hair was plucked from the scalp for 5 weeks and subsequently cut from the scalp for up to 10 weeks. Prior to analysis, plucked hair specimens were cut into three segments: (a) a proximal, 1-cm segment, which contained the root, (b) the next distal, 3-cm segment, which was closest to the scalp, and (c) a segment containing all remaining hair to the natural hair tip. in female subjects, the mean (plus or minus standard error of the mean) hair concentration of codeine in the proximal, 1-cm segment from plucked hair was 2.7 ng/mg (+/- 0.55) at 12 h after the last codeine dose; 0.44 ng/mg (+/- 0.20) still remained in this segment at 5 weeks. Codeine was detected in the next 3-cm hair segment (above the scalp) at 1 week; the average codeine concentration for 10 weeks in the 3-cm, distal segment was 0.54 ng/mg (+/- O.05). No codeine was detected in the remaining hair segment (to the tip) at any time. In male subjects studied previously, the mean hair concentration of codeine in the proximal, 1-cm hair segment was 2.6 ng/mg (+/- 0.34) at 12 h after the last codeine dose, and no codeine was detected at 5 weeks. Codeine was not detected in the next 3-cm hair segment (above the scalp) until 3 weeks, and the average mean codeine concentration for 10 weeks was 0.09 ng/mg (+/- 0.01). Differences noted between male and female subjects in distal codeine hair concentrations were not explained by plasma pharmacokinetics.
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Affiliation(s)
- D G Wilkins
- Department of Pharmacology and Toxicology, University of UT, SLC 84112, USA
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