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Nguyen TA, Mai TD, Vu LD, Dao CX, Ngo HM, Hoang HB, Tran TA, Pham TQ, Pham DT, Nguyen MH, Nguyen LQ, Dao PV, Nguyen DN, Vuong HTT, Vu HD, Nguyen DD, Vu TD, Nguyen DT, Do ALN, Nguyen CD, Do SN, Nguyen HT, Nguyen CV, Nguyen AD, Luong CQ. Validation of the accuracy of the modified World Federation of Neurosurgical Societies subarachnoid hemorrhage grading scale for predicting the outcomes of patients with aneurysmal subarachnoid hemorrhage. PLoS One 2023; 18:e0289267. [PMID: 37607172 PMCID: PMC10443875 DOI: 10.1371/journal.pone.0289267] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 07/16/2023] [Indexed: 08/24/2023] Open
Abstract
BACKGROUND Evaluating the prognosis of patients with aneurysmal subarachnoid hemorrhage (aSAH) who may be at risk of poor outcomes using grading systems is one way to make a better decision on treatment for these patients. This study aimed to compare the accuracy of the modified World Federation of Neurosurgical Societies (WFNS), WFNS, and Hunt and Hess (H&H) Grading Scales in predicting the outcomes of patients with aSAH. METHODS From August 2019 to June 2021, we conducted a multicenter prospective cohort study on adult patients with aSAH in three central hospitals in Hanoi, Vietnam. The primary outcome was the 90-day poor outcome, measured by a score of 4 (moderately severe disability) to 6 (death) on the modified Rankin Scale (mRS). We calculated the areas under the receiver operator characteristic (ROC) curve (AUROCs) to determine how well the grading scales could predict patient prognosis upon admission. We also used ROC curve analysis to find the best cut-off value for each scale. We compared AUROCs using Z-statistics and compared 90-day mean mRS scores among intergrades using the pairwise multiple-comparison test. Finally, we used logistic regression to identify factors associated with the 90-day poor outcome. RESULTS Of 415 patients, 32% had a 90-day poor outcome. The modified WFNS (AUROC: 0.839 [95% confidence interval, CI: 0.795-0.883]; cut-off value≥2.50; PAUROC<0.001), WFNS (AUROC: 0.837 [95% CI: 0.793-0.881]; cut-off value≥3.5; PAUROC<0.001), and H&H scales (AUROC: 0.836 [95% CI: 0.791-0.881]; cut-off value≥3.5; PAUROC<0.001) were all good at predicting patient prognosis on day 90th after ictus. However, there were no significant differences between the AUROCs of these scales. Only grades IV and V of the modified WFNS (3.75 [standard deviation, SD: 2.46] vs 5.24 [SD: 1.68], p = 0.026, respectively), WFNS (3.75 [SD: 2.46] vs 5.24 [SD: 1.68], p = 0.026, respectively), and H&H scales (2.96 [SD: 2.60] vs 4.97 [SD: 1.87], p<0.001, respectively) showed a significant difference in the 90-day mean mRS scores. In multivariable models, with the same set of confounding variables, the modified WFNS grade of III to V (adjusted odds ratio, AOR: 9.090; 95% CI: 3.494-23.648; P<0.001) was more strongly associated with the increased risk of the 90-day poor outcome compared to the WFNS grade of IV to V (AOR: 6.383; 95% CI: 2.661-15.310; P<0.001) or the H&H grade of IV to V (AOR: 6.146; 95% CI: 2.584-14.620; P<0.001). CONCLUSIONS In this study, the modified WFNS, WFNS, and H&H scales all had good discriminatory abilities for the prognosis of patients with aSAH. Because of the better effect size in predicting poor outcomes, the modified WFNS scale seems preferable to the WFNS and H&H scales.
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Affiliation(s)
- Tuan Anh Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Ton Duy Mai
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Stroke Center, Bach Mai Hospital, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | - Luu Dang Vu
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Co Xuan Dao
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Center for Critical Care Medicine, Bach Mai Hospital, Hanoi, Vietnam
| | - Hung Manh Ngo
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Department of Neurosurgery II, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Vietnam
- Department of Surgery, Hanoi Medical University, Hanoi, Vietnam
| | - Hai Bui Hoang
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
| | - Tuan Anh Tran
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Trang Quynh Pham
- Department of Surgery, Hanoi Medical University, Hanoi, Vietnam
- Department of Neurosurgery, Bach Mai Hospital, Hanoi, Vietnam
| | - Dung Thi Pham
- Department of Nutrition and Food Safety, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - My Ha Nguyen
- Department of Health Organization and Management, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Linh Quoc Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Phuong Viet Dao
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Stroke Center, Bach Mai Hospital, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | | | - Hien Thi Thu Vuong
- Emergency Department, Vietnam-Czechoslovakia Friendship Hospital, Hai Phong, Vietnam
| | - Hung Dinh Vu
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
| | - Dong Duc Nguyen
- Department of Neurosurgery II, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Vietnam
| | - Thanh Dang Vu
- Emergency Department, Agriculture General Hospital, Hanoi, Vietnam
| | | | - Anh Le Ngoc Do
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Cuong Duy Nguyen
- Department of Emergency and Critical Care Medicine, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Son Ngoc Do
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Center for Critical Care Medicine, Bach Mai Hospital, Hanoi, Vietnam
| | - Hao The Nguyen
- Department of Surgery, Hanoi Medical University, Hanoi, Vietnam
- Department of Neurosurgery, Bach Mai Hospital, Hanoi, Vietnam
| | - Chi Van Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Anh Dat Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Chinh Quoc Luong
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
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2
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Nguyen TA, Vu LD, Mai TD, Dao CX, Ngo HM, Hoang HB, Do SN, Nguyen HT, Pham DT, Nguyen MH, Nguyen DN, Vuong HTT, Vu HD, Nguyen DD, Nguyen LQ, Dao PV, Vu TD, Nguyen DT, Tran TA, Pham TQ, Van Nguyen C, Nguyen AD, Luong CQ. Predictive validity of the prognosis on admission aneurysmal subarachnoid haemorrhage scale for the outcome of patients with aneurysmal subarachnoid haemorrhage. Sci Rep 2023; 13:6721. [PMID: 37185953 PMCID: PMC10130082 DOI: 10.1038/s41598-023-33798-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/19/2023] [Indexed: 05/17/2023] Open
Abstract
This multicentre prospective cohort study aimed to compare the accuracy of the PAASH, WFNS, and Hunt and Hess (H&H) scales in predicting the outcomes of adult patients with aneurysmal SAH presented to three central hospitals in Hanoi, Vietnam, from August 2019 to June 2021. Of 415 eligible patients, 32.0% had a 90-day poor outcome, defined as an mRS score of 4 (moderately severe disability) to 6 (death). The PAASH, WFNS and H&H scales all have good discriminatory abilities for predicting the 90-day poor outcome. There were significant differences in the 90-day mean mRS scores between grades I and II (p = 0.001) and grades II and III (p = 0.001) of the PAASH scale, between grades IV and V (p = 0.026) of the WFNS scale, and between grades IV and V (p < 0.001) of the H&H scale. In contrast to a WFNS grade of IV-V and an H&H grade of IV-V, a PAASH grade of III-V was an independent predictor of the 90-day poor outcome. Because of the more clearly significant difference between the outcomes of the adjacent grades and the more strong effect size for predicting poor outcomes, the PAASH scale was preferable to the WFNS and H&H scales.
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Affiliation(s)
- Tuan Anh Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, 78 Giai Phong Road, Phuong Mai Ward, Dong Da District, Hanoi, 100000, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Luu Dang Vu
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Ton Duy Mai
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Stroke Center, Bach Mai Hospital, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | - Co Xuan Dao
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Center for Critical Care Medicine, Bach Mai Hospital, Hanoi, Vietnam
| | - Hung Manh Ngo
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Department of Neurosurgery II, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Vietnam
- Department of Surgery, Hanoi Medical University, Hanoi, Vietnam
| | - Hai Bui Hoang
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
| | - Son Ngoc Do
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Center for Critical Care Medicine, Bach Mai Hospital, Hanoi, Vietnam
| | - Hao The Nguyen
- Department of Surgery, Hanoi Medical University, Hanoi, Vietnam
- Department of Neurosurgery, Bach Mai Hospital, Hanoi, Vietnam
| | - Dung Thi Pham
- Department of Nutrition and Food Safety, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - My Ha Nguyen
- Department of Health Organization and Management, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Duong Ngoc Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, 78 Giai Phong Road, Phuong Mai Ward, Dong Da District, Hanoi, 100000, Vietnam
| | - Hien Thi Thu Vuong
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Emergency Department, Vietnam-Czechoslovakia Friendship Hospital, Hai Phong, Vietnam
| | - Hung Dinh Vu
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
| | - Dong Duc Nguyen
- Department of Neurosurgery II, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Vietnam
| | - Linh Quoc Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, 78 Giai Phong Road, Phuong Mai Ward, Dong Da District, Hanoi, 100000, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Phuong Viet Dao
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Stroke Center, Bach Mai Hospital, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | - Thanh Dang Vu
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Emergency Department, Agriculture General Hospital, Hanoi, Vietnam
| | | | - Tuan Anh Tran
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | - Trang Quynh Pham
- Department of Surgery, Hanoi Medical University, Hanoi, Vietnam
- Department of Neurosurgery, Bach Mai Hospital, Hanoi, Vietnam
| | - Chi Van Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, 78 Giai Phong Road, Phuong Mai Ward, Dong Da District, Hanoi, 100000, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Anh Dat Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, 78 Giai Phong Road, Phuong Mai Ward, Dong Da District, Hanoi, 100000, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Chinh Quoc Luong
- Center for Emergency Medicine, Bach Mai Hospital, 78 Giai Phong Road, Phuong Mai Ward, Dong Da District, Hanoi, 100000, Vietnam.
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam.
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam.
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3
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Nguyen TA, Mai TD, Vu LD, Dao CX, Ngo HM, Hoang HB, Tran TA, Pham TQ, Pham DT, Nguyen MH, Nguyen LQ, Dao PV, Nguyen DN, Vuong HTT, Vu HD, Nguyen DD, Vu TD, Nguyen DT, Do ALN, Pham QT, Khuat NH, Duong NV, Ngo CC, Do SN, Nguyen HT, Nguyen CV, Nguyen AD, Luong CQ. Factors related to intracerebral haematoma in patients with aneurysmal subarachnoid haemorrhage in Vietnam: a multicentre prospective cohort study. BMJ Open 2023; 13:e066186. [PMID: 37085308 PMCID: PMC10124281 DOI: 10.1136/bmjopen-2022-066186] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/23/2023] Open
Abstract
OBJECTIVES To investigate the impact of intracerebral haematoma (ICH) on the outcomes and the factors related to an ICH in patients with aneurysmal subarachnoid haemorrhage (aSAH) in a low- and middle-income country. DESIGN A multicentre prospective cohort study. SETTING Three central hospitals in Hanoi, Vietnam. PARTICIPANTS This study included all patients (≥18 years) presenting with aSAH to the three central hospitals within 4 days of ictus, from August 2019 to June 2021, and excluded patients for whom the admission Glasgow Coma Scale was unable to be scored or patients who became lost at 90 days of follow-up during the study. OUTCOME MEASURES The primary outcome was ICH after aneurysm rupture, defined as ICH detected on an admission head CT scan. The secondary outcomes were 90-day poor outcomes and 90-day death. RESULTS Of 415 patients, 217 (52.3%) were females, and the median age was 57.0 years (IQR: 48.0-67.0). ICH was present in 20.5% (85/415) of patients with aSAH. There was a significant difference in the 90-day poor outcomes (43.5% (37/85) and 29.1% (96/330); p=0.011) and 90-day mortality (36.5% (31/85) and 20.0% (66/330); p=0.001) between patients who had ICH and patients who did not have ICH. The multivariable regression analysis showed that systolic blood pressure (SBP) ≥140 mm Hg (adjusted odds ratio (AOR): 2.674; 95% CI: 1.372 to 5.214; p=0.004), World Federation of Neurosurgical Societies (WFNS) grades II (AOR: 3.683; 95% CI: 1.250 to 10.858; p=0.018) to V (AOR: 6.912; 95% CI: 2.553 to 18.709; p<0.001) and a ruptured middle cerebral artery (MCA) aneurysm (AOR: 3.717; 95% CI: 1.848 to 7.477; p<0.001) were independently associated with ICH on admission. CONCLUSIONS In this study, ICH was present in a substantial proportion of patients with aSAH and contributed significantly to a high rate of poor outcomes and death. Higher SBP, worse WFNS grades and ruptured MCA aneurysms were independently associated with ICH on admission.
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Affiliation(s)
- Tuan Anh Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Viet Nam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
| | - Ton Duy Mai
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Stroke Center, Bach Mai Hospital, Hanoi, Viet Nam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam
| | - Luu Dang Vu
- Department of Radiology, Hanoi Medical University, Hanoi, Viet Nam
- Radiology Centre, Bach Mai Hospital, Hanoi, Viet Nam
| | - Co Xuan Dao
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam
- Center for Critical Care Medicine, Bach Mai Hospital, Hanoi, Viet Nam
| | - Hung Manh Ngo
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam
- Department of Neurosurgery II, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Viet Nam
- Department of Surgery, Hanoi Medical University, Hanoi, Viet Nam
| | - Hai Bui Hoang
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Viet Nam
| | - Tuan Anh Tran
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam
- Department of Radiology, Hanoi Medical University, Hanoi, Viet Nam
- Radiology Centre, Bach Mai Hospital, Hanoi, Viet Nam
| | - Trang Quynh Pham
- Department of Surgery, Hanoi Medical University, Hanoi, Viet Nam
- Department of Neurosurgery, Bach Mai Hospital, Hanoi, Viet Nam
| | - Dung Thi Pham
- Department of Nutrition and Food Safety, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Viet Nam
| | - My Ha Nguyen
- Department of Health Organization and Management, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Viet Nam
| | - Linh Quoc Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Viet Nam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
| | - Phuong Viet Dao
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Stroke Center, Bach Mai Hospital, Hanoi, Viet Nam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam
| | | | - Hien Thi Thu Vuong
- Department of Emergency, Vietnam-Czechoslovakia Friendship Hospital, Hai Phong, Viet Nam
| | - Hung Dinh Vu
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Viet Nam
| | - Dong Duc Nguyen
- Department of Neurosurgery II, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Viet Nam
| | - Thanh Dang Vu
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Department of Emergency, Agriculture General Hospital, Hanoi, Viet Nam
| | | | - Anh Le Ngoc Do
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
| | - Quynh Thi Pham
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
| | - Nhung Hong Khuat
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Department of Intensive Care and Poison Control, Duc Giang General Hospital, Hanoi, Viet Nam
| | - Ninh Van Duong
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Department of Intensive Care and Poison Control, Dien Bien Provincial General Hospital, Dien Bien Phu, Viet Nam
| | - Cong Chi Ngo
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Department of Emergency, Military Central Hospital 108, Hanoi, Viet Nam
| | - Son Ngoc Do
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam
- Center for Critical Care Medicine, Bach Mai Hospital, Hanoi, Viet Nam
| | - Hao The Nguyen
- Department of Surgery, Hanoi Medical University, Hanoi, Viet Nam
- Department of Neurosurgery, Bach Mai Hospital, Hanoi, Viet Nam
| | - Chi Van Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Viet Nam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
| | - Anh Dat Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Viet Nam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
| | - Chinh Quoc Luong
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Viet Nam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Viet Nam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam
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Luong CQ, Ngo HM, Hoang HB, Pham DT, Nguyen TA, Tran TA, Nguyen DN, Do SN, Nguyen MH, Vu HD, Vuong HTT, Mai TD, Nguyen AQ, Le KH, Dao PV, Tran TH, Vu LD, Nguyen LQ, Pham TQ, Dong HV, Nguyen HT, Nguyen CV, Nguyen AD. Clinical characteristics and factors relating to poor outcome in patients with aneurysmal subarachnoid hemorrhage in Vietnam: A multicenter prospective cohort study. PLoS One 2021; 16:e0256150. [PMID: 34388213 PMCID: PMC8362943 DOI: 10.1371/journal.pone.0256150] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 07/30/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The prevalence of risk factors for poor outcomes from aneurysmal subarachnoid hemorrhage (SAH) varies widely and has not been fully elucidated to date in Vietnam. Understanding the risk and prognosis of aneurysmal SAH is important to reduce poor outcomes in Vietnam. The aim of this study, therefore, was to investigate the rate of poor outcome at 90 days of ictus and associated factors from aneurysmal SAH in the country. METHODS We performed a multicenter prospective cohort study of patients (≥18 years) presenting with aneurysmal SAH to three central hospitals in Hanoi, Vietnam, from August 2019 to August 2020. We collected data on the characteristics, management, and outcomes of patients with aneurysmal SAH and compared these data between good (defined as modified Rankin Scale (mRS) of 0 to 3) and poor (mRS, 4-6) outcomes at 90 days of ictus. We assessed factors associated with poor outcomes using logistic regression analysis. RESULTS Of 168 patients with aneurysmal SAH, 77/168 (45.8%) were men, and the median age was 57 years (IQR: 48-67). Up to 57/168 (33.9%) of these patients had poor outcomes at 90 days of ictus. Most patients underwent sudden-onset and severe headache (87.5%; 147/168) and were transferred from local to participating central hospitals (80.4%, 135/168), over half (57.1%, 92/161) of whom arrived in central hospitals after 24 hours of ictus, and the initial median World Federation of Neurological Surgeons (WFNS) grading score was 2 (IQR: 1-4). Nearly half of the patients (47.0%; 79/168) were treated with endovascular coiling, 37.5% (63/168) were treated with surgical clipping, the remaining patients (15.5%; 26/168) did not receive aneurysm repair, and late rebleeding and delayed cerebral ischemia (DCI) occurred in 6.1% (10/164) and 10.4% (17/163) of patients, respectively. An initial WFNS grade of IV (odds ratio, OR: 15.285; 95% confidence interval, CI: 3.096-75.466) and a grade of V (OR: 162.965; 95% CI: 9.975-2662.318) were independently associated with poor outcomes. Additionally, both endovascular coiling (OR: 0.033; 95% CI: 0.005-0.235) and surgical clipping (OR: 0.046; 95% CI: 0.006-0.370) were inversely and independently associated with poor outcome. Late rebleeding (OR: 97.624; 95% CI: 5.653-1686.010) and DCI (OR: 15.209; 95% CI: 2.321-99.673) were also independently associated with poor outcome. CONCLUSIONS Improvements are needed in the management of aneurysmal SAH in Vietnam, such as increasing the number of aneurysm repairs, performing earlier aneurysm treatment by surgical clipping or endovascular coiling, and improving both aneurysm repairs and neurocritical care.
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Affiliation(s)
- Chinh Quoc Luong
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- * E-mail:
| | - Hung Manh Ngo
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Department of Neurosurgery II, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Vietnam
| | - Hai Bui Hoang
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
| | - Dung Thi Pham
- Department of Nutrition and Food Safety, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Tuan Anh Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Tuan Anh Tran
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Duong Ngoc Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Son Ngoc Do
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Faculty of Medicine, University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | - My Ha Nguyen
- Department of Health Organization and Management, Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Hung Dinh Vu
- Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
| | - Hien Thi Thu Vuong
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Emergency Department, Vietnam–Czechoslovakia Friendship Hospital, Hai Phong, Vietnam
| | - Ton Duy Mai
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Stroke Center, Bach Mai Hospital, Hanoi, Vietnam
| | - Anh Quang Nguyen
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Kien Hoang Le
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Phuong Viet Dao
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
- Stroke Center, Bach Mai Hospital, Hanoi, Vietnam
| | - Thong Huu Tran
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Luu Dang Vu
- Radiology Centre, Bach Mai Hospital, Hanoi, Vietnam
- Department of Radiology, Hanoi Medical University, Hanoi, Vietnam
| | - Linh Quoc Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | | | - He Van Dong
- Department of Neurosurgery I, Neurosurgery Center, Vietnam-Germany Friendship Hospital, Hanoi, Vietnam
| | - Hao The Nguyen
- Department of Neurosurgery, Bach Mai Hospital, Hanoi, Vietnam
| | - Chi Van Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Anh Dat Nguyen
- Center for Emergency Medicine, Bach Mai Hospital, Hanoi, Vietnam
- Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
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Kieu DH, Trinh TH, Nguyen SL, Ngo HM. Extracranial meningioma in the scalp skin 25 years after epidural hematoma surgery: A case report. Int J Surg Case Rep 2021; 81:105734. [PMID: 33721823 PMCID: PMC7970347 DOI: 10.1016/j.ijscr.2021.105734] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 11/24/2022] Open
Abstract
Extracranial meningiomas are sporadic, with only published case reports in the literature. Extracranial meningiomas are classified into the primary and secondary types, often misdiagnosed before operation due to lack of prevalence and unusual symptoms. It is impossible to distinguish between intracranial and extracranial meningiomas regardless of histologic features. Surgical resection is the first-choice treatment for extracranial meningiomas.
Introduction and importance Extracranial meningiomas are rare, accounting for 1–2% of all meningiomas with just published in the form of a case report or series. They are categorized as primary or secondary tumors. In this paper, we present a case of extracranial meningioma in the scalp skin, which is believed in Vietnam's first case. Case presentation A 38 years old male with a history of brain epidural hematoma surgery in 1995 presented a subcutaneous protruding mass, which revealed approximately 3-centimeters from an incision scar in the left frontoparietal scalp. The tumor was firm, mobilized with contrast enhancement on magnetic resonance image. The complete surgical excision of the whole mass was performed, and histological examination revealed a WHO grade I meningioma. Clinical discussion Epidemiology, classification, diagnosis, treatment as well as prognosis of extracranial meningioma were discussed. We also hypothesized the emergence of extracranial meningioma after an epidural hematoma surgery. Conclusion Extracranial meningioma is quite rare, but it could be presented after a traumatic brain injury. Neurosurgery was the first choice, safe and effective treatment.
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Affiliation(s)
| | | | | | - Hung Manh Ngo
- Viet Duc Hospital, Hanoi, Viet Nam; University of Medicine and Pharmacy, Vietnam National University, Hanoi, Viet Nam.
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Ngo HM, Chu HT, Nguyen DD. Microsurgery for a ruptured intracranial aneurysm in a 3-year-old child: A case report. Int J Surg Case Rep 2020; 76:458-462. [PMID: 33072496 PMCID: PMC7553868 DOI: 10.1016/j.ijscr.2020.10.036] [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: 08/26/2020] [Revised: 10/04/2020] [Accepted: 10/04/2020] [Indexed: 11/28/2022] Open
Abstract
Intracranial aneurysms are rare in children, only case reports and case series published. Subarachnoid hemorrhage is the most common feature of pediatric intracranial aneurysm with good clinical grade. Microsurgical clipping is safe and effective in treatment of pediatric intracranial aneurysms.
Introduction Pediatric intracranial aneurysms are rare, with some different characteristics from those in adults. Here, we present a case of distal anterior cerebral artery aneurysm which we believe the first case from Vietnam. Presentation of case A 3 years old boy presented with headache, lethargic and hemiparesis was diagnosed ruptured distal anterior cerebral artery aneurysm with CTA. 10 days before admission in our hospital, the toddler was admitted in local hospital with diagnosis of SAH without more accurate findings. Clipping microsurgery of aneurysms with left interhemispheric approach was done with good outcome. Discussion The epidermiology, presentation and diagnosis and strategy of treatments as well as their outcomes were discussed. We also discussed our thoughts about our case within the limited-resource condition such as in Vietnam. Conclusion Pediatric intracranial anerusyms are rare but should be recognised in neurosurgical practice. Surgery is an effective treatment method.
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Key Words
- A2, A2 segment of anterior cerebral artery
- ACA, anterior cerebral artery
- AN, aneurysm
- CT, computed tomography
- CTA, computer tomography angiography
- Case report
- DSA, digital subtraction angiography
- EVD, external ventricular drain
- GOS, Glassgow Outcome Score
- IA, intracranial aneurysm
- ICA, internal carotid artery
- ICU, Intensive care unit
- IVH, intraventricular hemorrhage
- LOC, Loss of conciousness
- Microsurgical clipping
- Pediatric intracranial aneurysm
- SAH, subarachnoidal hemorrhage
- Surgery
- mRS, modified Rankin Scale
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Affiliation(s)
- Hung Manh Ngo
- Department of Neurosurgery, Viet Duc Hospital, Hanoi, Viet Nam.
| | - Hung Thanh Chu
- Hanoi Medical University, No 1 Ton That Tung Street, Hanoi, Viet Nam.
| | - Dong Duc Nguyen
- Department of Neurosurgery, Viet Duc Hospital, Hanoi, Viet Nam.
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Brosset C, Verdalle P, Ngo HM, Natali D, Nguyen TM, Nguyen HT. [Cerebrospinal fluid leak following pituitary surgery]. Rev Prat 2020; 70:405. [PMID: 32877096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- Christian Brosset
- Département de neurologie, hôpital français de Hanoï, Hanoï, Vietnam
| | - Pierre Verdalle
- Département d'ORL, hôpital français de Hanoi, Hanoï, Vietnam
| | - Hung Manh Ngo
- Département de neurochirurgie, hôpital Viet Duc, Hanoï, Vietnam
| | - Delphine Natali
- Département de pneumologie, hôpital français de Hanoï, Hanoï, Vietnam
| | - Thuy Minh Nguyen
- Département de radiologie, hôpital français de Hanoï, Hanoï, Vietnam
| | - Hung The Nguyen
- Département de radiologie, hôpital français de Hanoï, Hanoï, Vietnam
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Luong CQ, Nguyen AD, Nguyen CV, Mai TD, Nguyen TA, Do SN, Dao PV, Pham HTM, Pham DT, Ngo HM, Nguyen QH, Nguyen DT, Tran TH, Le KV, Do NT, Ngo ND, Nguyen VD, Ngo HD, Hoang HB, Vu HV, Vu LT, Ngo BT, Nguyen BX, Khuong DQ, Nguyen DT, Vuong TX, Be TH, Gaberel T, Nguyen LV. Effectiveness of Combined External Ventricular Drainage with Intraventricular Fibrinolysis for the Treatment of Intraventricular Haemorrhage with Acute Obstructive Hydrocephalus. Cerebrovasc Dis Extra 2019; 9:77-89. [PMID: 31408859 PMCID: PMC6751468 DOI: 10.1159/000501530] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 03/13/2019] [Accepted: 05/27/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Intraventricular haemorrhage (IVH) patients with acute obstructive hydrocephalus (AOH) who require external ventricular drainage (EVD) are at high risk for poor outcomes. Intraventricular fibrinolysis (IVF) with low-dose recombinant tissue plasminogen activator (rtPA) can be used to improve patient outcomes. Here, we evaluated the impact of IVF on the risk of death and the functional outcomes in IVH patients with AOH. METHODS This prospective cohort study included IVH patients with hypertensive intracranial haemorrhage complicated by AOH who required EVD. We evaluated the risk of death and the functional outcomes at 1 and 3 months, with a specific focus on the impact of combined EVD with IVF by low-dose rtPA. RESULTS Between November 30, 2011 and December 30, 2014, 80 patients were included. Forty-five patients were treated with EVD alone (EVD group) and 35 received IVF (EVD+IVF group). The 30- and 90-day mortality rates were lower in the EVD+IVF group than in the EVD group (42.2 vs. 11.4%, p = 0.003, and 62.2 vs. 20%, p < 0.001, respectively). The Graeb scores were significantly lower in the EVD+IVF group than in the EVD group (p ≤ 0.001) during the first 3 days and on day 7 after assignment. The 30-day good functional outcome (modified Rankin Scale [mRS] score 0-3) was also higher in the EVD+IVF group than in the EVD group (6.7 vs. 28.6%, p = 0.008). However, the 90-day good functional outcome (mRS score 0-3) did not significantly increase in the EVD+IVF group (30.8% in the EVD group vs. 51.6% in the EVD+IVF group, p = 0.112). CONCLUSIONS In our prospective observational study, EVD+IVF was associated with a lower risk of death in IVH patients. EVD+IVF improved the chance of having a good functional outcome at 1 month; however, this result was no longer observed at 3 months.
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Affiliation(s)
- Chinh Quoc Luong
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam, .,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam,
| | - Anh Dat Nguyen
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Chi Van Nguyen
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Ton Duy Mai
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Tuan Anh Nguyen
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Son Ngoc Do
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | | | - Hanh Thi My Pham
- Epidemiology Department, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Dung Thi Pham
- Department of Science Management, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Hung Manh Ngo
- Department of Neurosurgery II, Viet Duc Hospital, Hanoi, Vietnam
| | - Quan Huu Nguyen
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | | | - Thong Huu Tran
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Ky Van Le
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam
| | - Nam Trong Do
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam
| | - Ngoc Duc Ngo
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | | | - Hung Duc Ngo
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Hai Bui Hoang
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi, Vietnam
| | - Ha Viet Vu
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Emergency and Critical Care Department, Hanoi Medical University Hospital, Hanoi, Vietnam
| | - Lan Tuong Vu
- Emergency Department, Bach Mai Hospital, Hanoi, Vietnam.,Department of Emergency and Critical Care Medicine, Hanoi Medical University, Hanoi, Vietnam
| | - Binh Thanh Ngo
- Undergraduate Training and Management Department, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Bai Xuan Nguyen
- Department of Postgraduate Management, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | | | | | | | - Thu Hong Be
- Poison Control Centre, Bach Mai Hospital, Hanoi, Vietnam
| | - Thomas Gaberel
- Department of Neurosurgery, Caen University Hospital, Caen, France.,Department of Neurosurgery, University of Caen Normandy, Caen, France
| | - Lieu Van Nguyen
- Department of Neurology, Bach Mai Hospital, Hanoi, Vietnam.,Department of Neurology, Hanoi Medical University, Hanoi, Vietnam
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Do MT, Nguyen DTT, Ngo HM, Ledoux-Rak I, Lai ND. Controlled coupling of a single nanoparticle in polymeric microstructure by low one-photon absorption-based direct laser writing technique. Nanotechnology 2015; 26:105301. [PMID: 25697121 DOI: 10.1088/0957-4484/26/10/105301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We investigated the coupling of a single nanoparticle (NP) into a polymer-based photonic structure (PS). The low one-photon absorption microscopy with a two-step technique allowed us first to accurately determine the location of a NP and then to embed it as desired into an arbitrary PS. The coupling of a gold NP and a polymer-based PS was experimentally investigated showing a six-fold photon collection enhancement as compared to that of a NP in unpatterned film. The simulation results based on finite-difference time-domain calculation method confirmed this observation and showed a 2.86-fold enhancement in extraction efficiency thanks to the NP/PS coupling.
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Affiliation(s)
- M T Do
- Laboratoire de Photonique Quantique et Moléculaire, UMR 8537 CNRS, Institut d'Alembert, École Normale Supérieure de Cachan, 61 avenue du Président Wilson, F-94235 Cachan cedex, France
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Liendo A, Stedman TT, Ngo HM, Chaturvedi S, Hoppe HC, Joiner KA. Toxoplasma gondii ADP-ribosylation factor 1 mediates enhanced release of constitutively secreted dense granule proteins. J Biol Chem 2001; 276:18272-81. [PMID: 11278405 DOI: 10.1074/jbc.m008352200] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/06/2022] Open
Abstract
Toxoplasma gondii dense granules are morphologically similar to dense matrix granules in specialized secretory cells, yet are secreted in a constitutive, calcium-independent fashion. We previously demonstrated that secretion of dense granule proteins in permeabilized parasites was augmented by the non-hydrolyzable GTP analogue guanosine 5'-3-O-(thio)triphosphate (GTPgammaS) (Chaturvedi, S., Qi, H., Coleman, D. L., Hanson, P., Rodriguez, A., and Joiner, K. A. (1998) J. Biol. Chem. 274, 2424-2431). As now demonstrated by pharmacological and electron microscopic approaches, GTPgammaS enhanced release of dense granule proteins in the permeabilized cell system. To investigate the role of ADP-ribosylation factor 1 (ARF1) in this process, a cDNA encoding T. gondii ARF1 (TgARF1) was isolated. Endogenous and transgenic TgARF1 localized to the Golgi of T. gondii, but not to dense granules. An epitope-tagged mutant of TgARF1 predicted to be impaired in GTP hydrolysis (Q71L) partially dispersed the Golgi signal, with localization to scattered vesicles, whereas a mutant impaired in nucleotide binding (T31N) was cytosolic in location. Both mutants caused partial dispersion of a Golgi/trans-Golgi network marker. TgARF1 mutants inhibited delivery of the secretory reporter, Escherichia coli alkaline phosphatase, to dense granules, precluding an in vivo assessment of the role of TgARF1 in release of intact dense granules. To circumvent this limitation, recombinant TgARF1 was purified using two separate approaches, and used in the permeabilized cell assay. TgARF1 protein purified on a Cibacron G3 column and able to bind GTP stimulated dense granule secretion in the permeabilized cell secretion assay. These results are the first to show that ARF1 can augment release of constitutively secreted vesicles at the target membrane.
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Affiliation(s)
- A Liendo
- Department of Internal Medicine, Section of Infectious Diseases, Yale University School of Medicine, New Haven, Connecticut 06520-8022, USA
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