1
|
Thurn S, Kleinschmidt K, Kovacic I, Wendl C, Linker RA, Corbacioglu S, Schlachetzki F. Transcranial Doppler sonography and the effect of haematopoietic stem cell transplantation in sickle cell disease. Neurol Res Pract 2022; 4:12. [PMID: 35369878 PMCID: PMC8978343 DOI: 10.1186/s42466-022-00175-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 02/18/2022] [Indexed: 11/21/2022] Open
Abstract
Background Sickle cell disease (SCD) is one of the most prevalent monogenetic diseases worldwide and one of the most serious complications is stroke. Transcranial Doppler (TCD) demonstrated to be highly predictive for an imminent stroke by measuring blood flow velocities in the basal cerebral arteries. Currently, the only curative therapy for SCD is hematopoietic stem cell transplantation (HSCT). The aim of this study is to verify the correlation between blood flow velocities and stroke including the effect of HSCT.
Methods In our retrospective single-center study a total of 26 sickle cell patients (HbSS, HbSß+-thalassemia, HbSSα-thalassemia minima, HbSSα-thalassemia minor and HbSC) were analyzed between 2010 and 2016. The highest time averaged maximum mean blood flow velocity (TAMMV) measured was documented and evaluated with respect to SCD genotype and effect of HSCT. Acute and symptomatic as well as silent strokes were recorded as separate parameters.
Results In our study, ten patients had normal blood flow velocities before HSCT (six HbSS and four HbSß+-thalassemia patients) and 13 patients presented with abnormal TCD (eight HbSS, three HbSSα-thalassemia minima, one HbSSα-thalassemia minor and one HbSC). Thirteen of 26 study participants (ten HbSS and three HbSß+-thalassemia patients) received HSCT. In two patients, TAMMV in basal cerebral arteries remained “normal”, in one they remained conditional and in one TAMMV was reduced to normal. Four of 26 study participants (15.4%), including all patients with HbSS genotype, presented with a stroke, but none had “abnormal” TAMMV with TCD performed after the onset of stroke in each case. At the time we performed the TCD, the patients had already suffered the stroke. Conclusion In our study, none of the patients with stroke displayed abnormal blood flow velocities in TCD. Yet, HSCT at this stage of the disease still had a positive effect on TAMMV. Further studies are needed whether this effect converts into reduced stroke risk at all or only selected SCD patients undergoing HSCT.
Collapse
Affiliation(s)
- Sylvia Thurn
- Institute of Diagnostic Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - Katharina Kleinschmidt
- Department of Paediatric Haematology, Oncology and Stem Cell Transplantation, University Medical Center Regensburg, Regensburg, Germany
| | - Irena Kovacic
- Department of Neurology, University of Regensburg, Bezirksklinikum Regensburg, Regensburg, Germany.,Department of Neurology, University Medical Center Regensburg, Regensburg, Germany
| | - Christina Wendl
- Center for Neuroradiology, Bezirksklinikum Regensburg and University Medical Center Regensburg, Regensburg, Germany
| | - Ralf A Linker
- Department of Neurology, University of Regensburg, Bezirksklinikum Regensburg, Regensburg, Germany.,Department of Neurology, University Medical Center Regensburg, Regensburg, Germany
| | - Selim Corbacioglu
- Department of Paediatric Haematology, Oncology and Stem Cell Transplantation, University Medical Center Regensburg, Regensburg, Germany
| | - Felix Schlachetzki
- Department of Neurology, University of Regensburg, Bezirksklinikum Regensburg, Regensburg, Germany. .,Department of Neurology, University Medical Center Regensburg, Regensburg, Germany.
| |
Collapse
|
2
|
Idro R, Boehme AK, Kawooya M, Lubowa SK, Munube D, Bangirana P, Opoka R, Mupere E, Lignelli A, Kasirye P, Green NS, Minja FJ. Brain Magnetic Resonance Imaging and Angiography in Children with Sickle Cell Anaemia in Uganda in a Cross-Sectional Sample. J Stroke Cerebrovasc Dis 2022; 31:106343. [PMID: 35158150 PMCID: PMC9004405 DOI: 10.1016/j.jstrokecerebrovasdis.2022.106343] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 01/11/2022] [Accepted: 01/19/2022] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Children with sickle cell anaemia (SCA) are highly susceptible to cerebrovascular injury. We performed brain magnetic resonance imaging and angiography (MRI-MRA) in Ugandan children with SCA to identify structural cerebrovascular abnormalities and examine their relationship to standardized clinical assessments. METHODS A sub-sample (n=81) was selected from a cross-sectional study of children attending SCA clinic, including 52 (64.2%) with and 29 (35.8%) without clinically detected abnormalities. Clinical evaluation included assessment for prior stroke, cognitive testing and cerebral arterial transcranial doppler (TCD) flow velocity. MRI-MRA scans were interpreted by at least two neuroradiologists. RESULTS Mean age was 6.5±2.7 years, with 39 (48.1%) female. Mean haemoglobin was 7.3±0.9 g/dl. Overall, 13 (16.0%) were malnourished. Infarcts and/or stenoses were detected in 55 (67.9%) participants, with stenoses primarily in the anterior circulation. Infarcts were seen in those with normal 17/29 (58.6%) or abnormal 34/52 (65.4%) clinical testing (p=0.181). Neither abnormal MRI nor MRA was associated with age, sex, haemoglobin, or malnutrition. Abnormal MRA was highly associated with infarcts (p<0.0001). Participants with abnormal imaging had two-fold higher proportion of stroke on exam and/or impaired cognition. Stroke on exam was strongly associated with an imaging abnormality after adjusting for age, sex, malnutrition, and haemoglobin (OR 11.8, 95%CI 1.87-74.2). CONCLUSION Over half of these SCA children had cerebrovascular infarcts and/or arterial stenoses. Cerebrovascular disease was frequently undetectable by clinical assessments. While rarely available in under-resourced settings, MRI-MRA brain imaging is an important tool for defining SCA cerebrovascular disease and for assessing impact of clinical intervention trials.
Collapse
Affiliation(s)
| | | | - Michael Kawooya
- Radiology, Makerere University College of Health Sciences, Kampala, Uganda; Ernest Cook Ultrasound Research and Education Institute (ECUREI) Mengo Hospital, Kampala, Uganda
| | - Samson K Lubowa
- Radiology, Makerere University College of Health Sciences, Kampala, Uganda
| | | | | | | | | | - Angela Lignelli
- Radiology, Columbia University Irving Medical Center, NY, USA
| | | | | | - Frank J Minja
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA, USA
| |
Collapse
|
3
|
Hematologic Disorders and Stroke. Stroke 2022. [DOI: 10.1016/b978-0-323-69424-7.00042-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
4
|
Kamath SD, Pai MG. A case series of hemorrhagic neurological complications of sickle cell disease: Multiple faces of an underestimated problem! Asian J Transfus Sci 2021; 15:241-246. [PMID: 34908763 PMCID: PMC8628230 DOI: 10.4103/ajts.ajts_101_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 12/09/2018] [Indexed: 11/12/2022] Open
Abstract
Sickle cell disease (SCD) is a group of hemoglobinopathies that vary in severity, the most severe form, homozygous sickle cell anemia, is more commonly associated with neurologic complications. These are attributed to the vaso-occlusion and micro-obstruction in the circulation of the central nervous system. The incidence of various neurologic complications in SCD ranges from 6% to 30% in various series. The commonly reported in literature include silent cerebral infarction (SCI), ischemic stroke, transient ischemic attacks (TIAs), headaches, seizures and neurocognitive impairment. However, hemorrhagic complications like subarachnoid hemorrhage (SAH), hemorrhagic stroke, extradural and subdural hematomas, especially in absence of trauma are rarely thought of. We report three uncommon spontaneous hemorrhagic manifestations of sickle cell anemia – one case of parenchymal (intracerebral) bleed who presented with acute onset of parkinsonism and two cases of extradural hematoma (EDH) of which one patient had recurrent EDH at the same site which is hitherto not reported in the literature.
Collapse
Affiliation(s)
- Sangita D Kamath
- Department of Internal Medicine, Tata Main Hospital, Tata Steel, Jamshedpur, Jharkhand, India
| | - Manish Ganesh Pai
- Department of Neurosurgery, Tata Main Hospital, Tata Steel, Jamshedpur, Jharkhand, India
| |
Collapse
|
5
|
Ojinnaka U, Ahmed Z, Kannan A, Quadir H, Hakobyan K, Gaddam M, Mostafa JA. A Traditional Review of Sickle Cell Disease and the Associated Onset of Dementia: Hematological and Neurocognitive Crossroads. Cureus 2021; 13:e18906. [PMID: 34703679 PMCID: PMC8530004 DOI: 10.7759/cureus.18906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 10/19/2021] [Indexed: 11/26/2022] Open
Abstract
Sickle cell trait and disease are potential risk factors for dementia and cognitive dysfunction in African Americans, as are genetic variants. This illness affects around 300 million people globally. Due to its ability to defend against severe malaria, it represents an evolutionary survival advantage. It has been shown that sickle cell disease and trait are independent risk factors for the prevalence and incidence of albuminuria and chronic renal disease. Sickle cell anemia impairs cognitive performance in people with minimal or mild manifestations of the genetic blood disorder, owing mostly to its cerebrovascular implications. Similarly, various cerebral minor vascular disorders, such as silent cerebral infarcts, have been linked to the sickle cell trait, which is associated with impaired cognitive ability. It has been found that patients with sickle cell disease have a significantly decreased subcortical and cortical brain volume. Adults and children with sickle cell disease have been documented to have attention-related issues, particularly reduced sustained attention.
Collapse
Affiliation(s)
- Ugochi Ojinnaka
- Family Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Zubayer Ahmed
- Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Amudhan Kannan
- Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, IND
- General Surgery, Research, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Huma Quadir
- Internal Medicine, Family Medicine, Neurology, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Knkush Hakobyan
- Diagnostic Radiology, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Mrunanjali Gaddam
- Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Jihan A Mostafa
- Psychiatry, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| |
Collapse
|
6
|
Muhammed E, Cooper J, Devito D, Mushi R, del Pilar Aguinaga M, Erenso D, Crogman H. Elastic property of sickle cell anemia and sickle cell trait red blood cells. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-210188R. [PMID: 34590447 PMCID: PMC8479689 DOI: 10.1117/1.jbo.26.9.096502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/02/2021] [Indexed: 05/14/2023]
Abstract
SIGNIFICANCE We introduce a model for better calibration of the trapping force using an equal but oppositely directed drag force acting on a trapped red blood cell (RBC). We demonstrate this approach by studying RBCs' elastic properties from deidentified sickle cell anemia (SCA) and sickle cell trait (SCT) blood samples. AIM A laser trapping (LT) force was formulated and analytically calculated in a cylindrical model. Using this trapping force relative percent difference, the maximum (longitudinal) and minimum (transverse) radius rate and stiffness were used to study the elasticity. APPROACH The elastic property of SCA and SCT RBCs was analyzed using LT technique with computer controlled piezo-driven stage, in order to trap and stretch the RBCs. RESULTS For all parameters, the results show that the SCT RBC samples have higher elastic property than the SCA RBCs. The higher rigidity in the SCA cell may be due to the lipid composition of the membrane, which was affected by the cholesterol concentration. CONCLUSIONS By developing a theoretical model for different trapping forces, we have also studied the elasticity of RBCs in SCT (with hemoglobin type HbAS) and in SCA (with hemoglobin type HbSS). The results for the quantities describing the elasticity of the cells consistently showed that the RBCs in the SCT display lower rigidity and higher deformability than the RBCs with SCA.
Collapse
Affiliation(s)
- Endris Muhammed
- Addis Ababa University, Department of Physics, Addis Ababa, Ethiopia
| | - James Cooper
- Middle Tennessee State University, Department of Physics, Murfreesboro, Tennessee, United States
| | - Daniel Devito
- Middle Tennessee State University, Department of Physics, Murfreesboro, Tennessee, United States
| | - Robert Mushi
- Meharry Medical College, Meharry Sickle Cell Center, Department of Internal Medicine, Nashville, Tennessee, United States
| | - Maria del Pilar Aguinaga
- Meharry Medical College, Meharry Sickle Cell Center, Department of Internal Medicine, Nashville, Tennessee, United States
- Meharry Medical College, Department of Obstetrics and Gynecology, Nashville, Tennessee, United States
| | - Daniel Erenso
- Middle Tennessee State University, Department of Physics, Murfreesboro, Tennessee, United States
| | - Horace Crogman
- California State University Dominguez Hills, Department of Physics, Carson, California, United States
| |
Collapse
|
7
|
Saulsberry-Abate AC, Partanen M, Porter JS, Podila PSB, Hodges JR, King AA, Wang WC, Schreiber JE, Zhao X, Kang G, Jacola LM, Hankins JS. Cognitive performance as a predictor of healthcare transition in sickle cell disease. Br J Haematol 2021; 192:1082-1091. [PMID: 33570182 DOI: 10.1111/bjh.17351] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 01/06/2021] [Indexed: 12/21/2022]
Abstract
Neurocognitive deficits in sickle cell disease (SCD) may impair adult care engagement. We investigated the relationship between neurocognitive functioning and socio-environmental factors with healthcare transition outcomes. Adolescents aged 15-18 years who had neurocognitive testing and completed a visit with an adult provider were included. Transition outcomes included transfer interval from paediatric to adult care and retention in adult care at 12 and 24 months. Eighty adolescents (59% male, 64% HbSS/HbSβ0 -thalassaemia) were included. Mean age at adult care transfer was 18·0 (±0·3) years and transfer interval was 2·0 (±2·3) months. Higher IQ (P = 0·02; PFDR = 0·05) and higher verbal comprehension (P = 0·008; PFDR = 0·024) were associated with <2 and <6 month transfer intervals respectively. Better performance on measures of attention was associated with higher adult care retention at 12 and 24 months (P = 0·009; PFDR = 0·05 and P = 0·04; PFDR = 0·12 respectively). Transfer intervals <6 months were associated with smaller households (P = 0·02; PFDR = 0·06) and households with fewer children (P = 0·02; PFDR = 0·06). Having a working parent was associated with less retention in adult care at 12 and 24 months (P = 0·01; P = 0·02 respectively). Lower IQ, verbal comprehension, attention difficulties and environmental factors may negatively impact transition outcomes. Neurocognitive function should be considered in transition planning for youth with SCD.
Collapse
Affiliation(s)
| | - Marita Partanen
- Princess Maxima Center for Pediatric Oncology, Heidelberglaan, The Netherlands
| | - Jerlym S Porter
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Pradeep S B Podila
- Methodist Comprehensive Sickle Cell Center, Methodist University Hospital, Memphis, TN, USA
| | - Jason R Hodges
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Allison A King
- Program in Occupational Therapy and Departments of Pediatrics and Medicine, Washington University, St. Louis, MO, USA
| | - Winfred C Wang
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jane E Schreiber
- Department of Child and Adolescent Psychiatry and Behavioral Sciences, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Xiwen Zhao
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Guolian Kang
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Lisa M Jacola
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jane S Hankins
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| |
Collapse
|
8
|
Nafile Sayman E, Leblebİsatan G, Leblebisatan Ş, Bıçakcı YK, Kılınç Y, Barutçu A. Silent cerebral infarct in sickle cell anemia patients of southern Turkey. Turk J Med Sci 2020; 50:1887-1893. [PMID: 32599969 PMCID: PMC7775705 DOI: 10.3906/sag-2003-192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 06/27/2020] [Indexed: 12/02/2022] Open
Abstract
Background/aim Silent cerebral infarct (SCI) is an ischemic lesion seen before clinical signs of brain infarct and ischemic changes in brain tissue. This study aimed to detect SCI with noninvasive methods and to determine related risk factors in patients with sickle cell anemia (SCA). Materials and methods Fifty-four SCA patients who had no history of cerebral infarct and whose neurological examinations were normal were included in this study. Brain magnetic resonance imaging (MRI) and diffusion MRI were taken and the acquired data was compared statistically. Results SCI was detected in 11.1% (6/54) of the patients. No statistical differences in age, sex, physical examination findings, or treatments were detected between the 2 groups (with and without SCI). When examined in terms of HbS, the median (min–max) value in SCI-positive patients was 85.4 (80.5–92.1); the median value was 77.2 (49.0–96.7) in SCI-negative patients. The HbS values of the SCI group were statistically significantly higher than those of the group without SCI (P = 0.014). Patients with the HbSS or HbSβ0 genotypes had a significantly higher prevalence of SCI when compared with other sickle cell syndromes (P = 0.038). Conclusion SCI is not uncommon among SCA patients in Turkey. The presence of homozygote HbSS/Sβ0 genotype, high MCV, and HbS are risk factors for SCI.
Collapse
Affiliation(s)
- Ezgi Nafile Sayman
- Department of Pediatrics, Faculty of Medicine, Çukurova University, Adana, Turkey
| | - Göksel Leblebİsatan
- Department of PediatricHematology, Faculty of Medicine, Çukurova University, Adana, Turkey
| | | | - Yunus Kenan Bıçakcı
- Department of Radiology, Faculty of Medicine, Çukurova University, Adana, Turkey
| | - Yurdanur Kılınç
- Department of PediatricHematology, Faculty of Medicine, Çukurova University, Adana, Turkey
| | - Adnan Barutçu
- Department of Pediatrics, Faculty of Medicine, Çukurova University, Adana, Turkey
| |
Collapse
|
9
|
Castro IPS, Viana MB. Cognitive profile of children with sickle cell anemia compared to healthy controls. JORNAL DE PEDIATRIA (VERSÃO EM PORTUGUÊS) 2019. [DOI: 10.1016/j.jpedp.2018.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
10
|
Castro IPS, Viana MB. Cognitive profile of children with sickle cell anemia compared to healthy controls. J Pediatr (Rio J) 2019; 95:451-457. [PMID: 29957246 DOI: 10.1016/j.jped.2018.04.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 04/06/2018] [Accepted: 04/16/2018] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE To evaluate the cognitive abilities of children and adolescents with sickle cell anemia diagnosed through neonatal screening and to compare them with healthy controls, adjusting the results to their socioeconomic status. METHODS Cognitive assessment was performed with the Wechsler WISC-III scale in 64 children and adolescents with sickle cell anemia and in 64 controls matched by gender and age, without the disease and without neurological impairment; socioeconomic status was measured by the Criterion Brasil. RESULTS All cognitive scores were lower in the group of patients. The mean overall IQ, Verbal IQ, and Performance IQ were, respectively, 90.95 for the group of patients and 113.97 for the controls (p<0.001); 91.41 for the group of patients and 112.31 for the controls (p<0.001); 92.34 for the group of patients and 113.38 for the controls (p<0.001). Scores for processing speed, distraction resistance, and perceptual organization were also significantly lower in patients. A direct and significant correlation was detected between socioeconomic status and cognitive scores. In the multivariate analysis, for the same socioeconomic status, a child with sickle cell anemia had an average IQ of 21.2 points lower than the mean IQ observed for the controls (p<0.001), indicating that the disease, adjusted for the socioeconomic effect, is a strong predictor of the overall IQ. CONCLUSION The cognitive impairment of children with sickle cell anemia is severe and manifests even when the disease effect is adjusted to the socioeconomic status. In the authors' view, such impairment requires an early preventive approach in order to avoid this cognitive damage.
Collapse
Affiliation(s)
- Isabel Pimenta Spínola Castro
- Universidade Federal de Minas Gerais (UFMG), Programa de Pós-Graduação em Saúde da Criança e do Adolescente, Belo Horizonte, MG, Brazil.
| | - Marcos Borato Viana
- Universidade Federal de Minas Gerais (UFMG), Faculdade de Medicina, Departamento de Pediatria, Belo Horizonte, MG, Brazil
| |
Collapse
|
11
|
Ismail WIM, Elnour M, Mustafa AEM. Evaluation of transcranial Doppler abnormalities in children with sickle cell disease in El-Obeid Specialized Children's Hospital. J Family Med Prim Care 2019; 8:1176-1181. [PMID: 31041270 PMCID: PMC6482797 DOI: 10.4103/jfmpc.jfmpc_112_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objectives: This study aims to evaluate transcranial Doppler abnormalities in children with sickle cell disease (SCD) in a specialized children's hospital in El-Obeid. Materials and Methods: This is a cross-sectional study done on 119 patients (2–18 years of age were included) who attended the sickle cell clinic in a specialized children's hospital in El-Obeid from December 2016 to February 2017; when patients do not have recent stroke symptoms, blood flow velocities were measured in both proximal internal carotid and middle cerebral arteries (MCAs) using non-imaging Doppler method, and time average mean velocities were recorded along with hemoglobin concentration and of the patients. Results: None of the study population had MCA velocity higher than 200 cm/s; also no high conditional velocity (170–199 cm/s) was recorded, so no patient was at high risk to develop stroke. About 20.1% of patients showed low velocities in one or both MCAs; 4.2% had abnormal MCAs’ interhemispheric ratio; 4.2% of study population showed absent flow in one of their MCAs, reflecting previous occlusion. About 4.2% had poor temporal window. It was difficult to measure the velocity in one of the four vessels in 5.9% of the patient due to uncooperativeness. There was statistically significant relationship between hemoglobin concentration and blood velocity in the left MCA. Conclusion: Despite the international recommendations, using transcranial Doppler ultrasonography (TCD) as a stroke screening tool in children with SCD in Sudan is still not a well-known practice. Successful strategies to improve TCD screening rates must be encouraged in all healthcare institutions.
Collapse
Affiliation(s)
| | - Mustafa Elnour
- Department of Radiology, Faculty of Medicine, University of Khartoum, Sudan
| | - Alam Eldin Musa Mustafa
- Department of Pediatrics, King Khalid University, Abha, Saudi Arabia.,Department of Pediatrics, University of Kordofan, Sudan
| |
Collapse
|
12
|
Adekunle MO, Animasahun AB, Diaku-Akinwumi IN, Njokanma OF. Pattern of Cerebral Blood Flow Velocity Using Transcranial Doppler Ultrasonography in Children with Sickle Cell Disorder in Lagos State, Nigeria. Mediterr J Hematol Infect Dis 2017; 9:e2017050. [PMID: 28894559 PMCID: PMC5584770 DOI: 10.4084/mjhid.2017.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 07/03/2017] [Indexed: 11/18/2022] Open
Abstract
Cerebrovascular accident (CVA) is a common, devastating neurological complication of sickle cell disorder (SCD) with a high recurrent and mortality rate. The Stroke Prevention Trial in Sickle Cell Anaemia study (STOP) recommends routine screening with transcranial Doppler ultrasonography in children aged two to sixteen years with SCD. The present study assessed cerebral blood flow velocities of children with SCD in accordance with the recommendation of routine screening by the STOP study. METHODS Transcranial Doppler ultrasonography was done for children with SCD that attended Sickle Cell Foundation, Nigeria between July and November 2015. RESULTS In all, 388 subjects were screened within the study period (360 HbSS and 28 HbSC). The prevalence of abnormal Time-Averaged Maximum Mean Velocity (TAMMV) of at least 200 cm/second was 10.8%: this was seen solely in HbSS subjects. The mean Time-averaged mean of the maximum (TAMM) velocity were 163±25 cm/sec, 162±30 cm/sec and 150±30 cm/sec for children less than five years, five to ten years and eleven to sixteen years respectively. CONCLUSION The prevalence of abnormal TAMM velocity in children with HbSS is 10.8%. Identification of subjects at risk helped in primary CVA prevention by prompt therapy institution.
Collapse
|
13
|
Choi S, Bush AM, Borzage MT, Joshi AA, Mack WJ, Coates TD, Leahy RM, Wood JC. Hemoglobin and mean platelet volume predicts diffuse T1-MRI white matter volume decrease in sickle cell disease patients. NEUROIMAGE-CLINICAL 2017; 15:239-246. [PMID: 28540180 PMCID: PMC5430155 DOI: 10.1016/j.nicl.2017.04.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 04/13/2017] [Accepted: 04/25/2017] [Indexed: 02/01/2023]
Abstract
Sickle cell disease (SCD) is a life-threatening genetic condition. Patients suffer from chronic systemic and cerebral vascular disease that leads to early and cumulative neurological damage. Few studies have quantified the effects of this disease on brain morphometry and even fewer efforts have been devoted to older patients despite the progressive nature of the disease. This study quantifies global and regional brain volumes in adolescent and young adult patients with SCD and racially matched controls with the aim of distinguishing between age related changes associated with normal brain maturation and damage from sickle cell disease. T1 weighted images were acquired on 33 clinically asymptomatic SCD patients (age = 21.3 ± 7.8; F = 18, M = 15) and 32 racially matched control subjects (age = 24.4 ± 7.5; F = 22, M = 10). Exclusion criteria included pregnancy, previous overt stroke, acute chest, or pain crisis hospitalization within one month. All brain volume comparisons were corrected for age and sex. Globally, grey matter volume was not different but white matter volume was 8.1% lower (p = 0.0056) in the right hemisphere and 6.8% (p = 0.0068) in the left hemisphere in SCD patients compared with controls. Multivariate analysis retained hemoglobin (β = 0.33; p = 0.0036), sex (β = 0.35; p = 0.0017) and mean platelet volume (β = 0.27; p = 0.016) as significant factors in the final prediction model for white matter volume for a combined r2 of 0.37 (p < 0.0001). Lower white matter volume was confined to phylogenetically younger brain regions in the anterior and middle cerebral artery distributions. Our findings suggest that there are diffuse white matter abnormalities in SCD patients, especially in the frontal, parietal and temporal lobes, that are associated with low hemoglobin levels and mean platelet volume. The pattern of brain loss suggests chronic microvascular insufficiency and tissue hypoxia as the causal mechanism. However, longitudinal studies of global and regional brain morphometry can help us give further insights on the pathophysiology of SCD in the brain. Total white matter brain volume is decreased in sickle cell disease patients. Global white matter decrease is found to be due to anemia. Diffuse WM volume decrease is found especially in watershed areas. Diffuse WM volume decrease spatially colocalize with silent stroke in SCD patients.
Collapse
Key Words
- ACA, anterior cerebral artery
- GM, grey matter
- Hemoglobin
- HgB, hemoglobin
- MCA, middle cerebral artery
- MPV, mean platelet volume
- MRI, magnetic resonance imaging
- Mean platelet volume
- PCA, posterior cerebral artery
- ROI, region of interest
- SCD, sickle cell disease
- Sickle cell disease
- Structural MRI
- WM, white matter
- WMHI, white matter hyperintensities
- White matter
Collapse
Affiliation(s)
- Soyoung Choi
- Neuroscience Graduate Program, University of Southern California, 3641 Watt Way, HNB 120, Los Angeles, CA 90089-2520, USA; Signal and Image Processing Institution, University of Southern California, 3740 McClintock Avenue, EEB 400, Los Angeles, CA 90089-2560, USA; Department of Pediatrics and Radiology, Children's Hospital Los Angeles USC, 4650 Sunset Blvd., MS #81, Los Angeles, CA 90027, USA.
| | - Adam M Bush
- Biomedical Engineering, University of Southern California, 1042 Downey Way, Los Angeles, CA 90089, USA.
| | - Matthew T Borzage
- Department of Pediatrics and Radiology, Children's Hospital Los Angeles USC, 4650 Sunset Blvd., MS #81, Los Angeles, CA 90027, USA.
| | - Anand A Joshi
- Signal and Image Processing Institution, University of Southern California, 3740 McClintock Avenue, EEB 400, Los Angeles, CA 90089-2560, USA.
| | - William J Mack
- Department of Neurosurgery, University of Southern California Keck School of Medicine, 1200 North State St., Suite 3300, Los Angeles, CA 90033, USA.
| | - Thomas D Coates
- Hematology/Oncology, Children's Hospital Los Angeles, 4650 Sunset Blvd. MS #54, Los Angeles, CA 90027, USA.
| | - Richard M Leahy
- Signal and Image Processing Institution, University of Southern California, 3740 McClintock Avenue, EEB 400, Los Angeles, CA 90089-2560, USA; Biomedical Engineering, University of Southern California, 1042 Downey Way, Los Angeles, CA 90089, USA.
| | - John C Wood
- Department of Pediatrics and Radiology, Children's Hospital Los Angeles USC, 4650 Sunset Blvd., MS #81, Los Angeles, CA 90027, USA; Biomedical Engineering, University of Southern California, 1042 Downey Way, Los Angeles, CA 90089, USA.
| |
Collapse
|
14
|
Primary and Secondary Stroke Prevention in Children With Sickle Cell Disease. J Pediatr Health Care 2017; 31:145-154. [PMID: 27423528 DOI: 10.1016/j.pedhc.2016.06.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 06/08/2016] [Accepted: 06/09/2016] [Indexed: 01/09/2023]
Abstract
Children with sickle cell disease (SCD) have numerous acute and chronic complications, including central nervous system (CNS) disease, which can be debilitating over their life span. Recognition of risk factors for CNS disease and overt CNS disease should be properly identified by primary care providers, including physicians, physician assistants, and nurse practitioners. Here, we discuss an emerging and important early indicator of CNS disease in the form of silent cerebral infarcts and review overt stroke in patients with SCD. We also discuss transcranial Doppler ultrasonography, when and how often transcranial Doppler ultrasounds should be performed, and management of abnormal results. Lastly, we review the clinical data for the management and prevention of silent cerebral infarcts and overt stroke in children with SCD.
Collapse
|
15
|
Smith KE, Schatz J. Working Memory in Children With Neurocognitive Effects From Sickle Cell Disease: Contributions of the Central Executive and Processing Speed. Dev Neuropsychol 2016; 41:231-244. [PMID: 27759435 DOI: 10.1080/87565641.2016.1238474] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Children with sickle cell disease (SCD) are at risk for working memory deficits due to multiple disease processes. We assessed working memory abilities and related functions in 32 school-age children with SCD and 85 matched comparison children using Baddeley's working memory model as a framework. Children with SCD performed worse than controls for working memory, central executive function, and processing/rehearsal speed. Central executive function was found to mediate the relationship between SCD status and working memory, but processing speed did not. Cognitive remediation strategies that focus on central executive processes may be important for remediating working memory deficits in SCD.
Collapse
Affiliation(s)
- Kelsey E Smith
- a Department of Psychology , University of South Carolina , Columbia , South Carolina
| | - Jeffrey Schatz
- a Department of Psychology , University of South Carolina , Columbia , South Carolina
| |
Collapse
|
16
|
Geard A, Pule GD, Chelo D, Bitoungui VJN, Wonkam A. Genetics of Sickle Cell-Associated Cardiovascular Disease: An Expert Review with Lessons Learned in Africa. OMICS : A JOURNAL OF INTEGRATIVE BIOLOGY 2016; 20:581-592. [PMID: 27726639 PMCID: PMC5067873 DOI: 10.1089/omi.2016.0125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Sickle cell disease (SCD) vastly impacts the African continent and is associated with cardiovascular diseases. Stroke, kidney disease, and pulmonary hypertension are considered as proxies of severity in SCD with several genomic loci implicated in their heritability. The present expert review examined the current data on epidemiology and genetic risk factors of stroke, pulmonary hypertension, and kidney disease associated with SCD, as indexed in PubMed® and Google Scholar®. Studies collectively show that stroke and kidney disease each affect ∼10% of SCD patients, with pulmonary hypertension displaying a higher prevalence of 30% among adults with SCD. There is some evidence that these epidemiology figures may be an underestimate in SCD patients living in Africa. A modest number of publications have identified genetic factors involved in pathways regulating inflammation, coagulation, cell adhesion, heme degradation, α-globin and γ-globin production, and others, which contribute to the development risk of targeted cardiovascular phenotypes. However, in most cases, these studies have not been validated across populations. There is therefore an urgent need for large-scale genome-wide association, whole-exome and whole-genome studies, and multiomics research on cardiovascular diseases associated with SCD, particularly in Africa, to allow for proportional investment of global research funding on diseases that greatly impact the African continent. Ultimately, this will cultivate socially responsible research investments and identification of at-risk individuals with improved preventive medicine, which should be a cornerstone of global precision medicine.
Collapse
Affiliation(s)
- Amy Geard
- Division of Human Genetics, Departments of Medicine and Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Gift D. Pule
- Division of Human Genetics, Departments of Medicine and Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - David Chelo
- Department of Paediatrics, Faculty of Medicine and Biomedical Sciences, University of Yaoundé, Yaoundé, Cameroon
| | | | - Ambroise Wonkam
- Division of Human Genetics, Departments of Medicine and Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| |
Collapse
|
17
|
Buonanno FS, Schmahmann JD, Romero JM, Makar RS. CASE RECORDS of the MASSACHUSETTS GENERAL HOSPITAL. Case 10-2016. A 22-Year-Old Man with Sickle Cell Disease, Headache, and Difficulty Speaking. N Engl J Med 2016; 374:1265-75. [PMID: 27028917 DOI: 10.1056/nejmcpc1501148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Ferdinando S Buonanno
- From the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Massachusetts General Hospital, and the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Harvard Medical School - both in Boston
| | - Jeremy D Schmahmann
- From the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Massachusetts General Hospital, and the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Harvard Medical School - both in Boston
| | - Javier M Romero
- From the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Massachusetts General Hospital, and the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Harvard Medical School - both in Boston
| | - Robert S Makar
- From the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Massachusetts General Hospital, and the Departments of Neurology (F.S.B., J.D.S.), Radiology (J.M.R.), and Pathology (R.S.M.), Harvard Medical School - both in Boston
| |
Collapse
|
18
|
Hematologic Disorders and Stroke. Stroke 2016. [DOI: 10.1016/b978-0-323-29544-4.00042-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
19
|
Abere TA, Okoye CJ, Agoreyo FO, Eze GI, Jesuorobo RI, Egharevba CO, Aimator PO. Antisickling and toxicological evaluation of the leaves of Scoparia dulcis Linn (Scrophulariaceae). BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 15:414. [PMID: 26597857 PMCID: PMC4657272 DOI: 10.1186/s12906-015-0928-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 11/02/2015] [Indexed: 12/04/2022]
Abstract
BACKGROUND Scoparia dulcis Linn (Scrophulariaceae) together with other medicinal plants serve as antisickling remedies in Africa. This study was aimed at investigating the antisickling activity of the leaves of the plant as well as establishing the toxicological profile. METHOD Chemical tests were employed in phytochemical investigations. Evaluation of the antisickling activity involved the inhibition of sodium metabisulphite-induced sickling of the HbSS red blood cells obtained from confirmed sickle cell patients who were not in crises. Concentrations of the crude extract and its fractions were tested with normal saline and p-hydroxybenzoic acid serving as controls. Acute toxicological evaluation was carried out in mice while 30-day assessment was done in rats. RESULTS Phytochemical screening revealed the presence of alkaloids, tannins, flavonoids and saponins. Percentage sickling inhibitions of the aqueous methanol extracts of S. dulcis were significant all through the period of assay p < 0. 05 compared to normal saline, but not significant with PHBA. The fractions had less activity compared to the crude extracts. The LD 50 of the extract in mice was above 8000 mg/kg body weight when administered orally. Toxicological evaluations at 250 and 500 mg/kg showed mild congestion in virtually all the target organs. CONCLUSION The antisickling results confirmed traditional usage of Scoparia dulcis in the management of Sickle cell disorders and a candidate for further investigations.
Collapse
Affiliation(s)
- Tavs A Abere
- Department of Pharmacognosy, Faculty of Pharmacy, University of Benin, Benin City, Nigeria.
| | - Chiagozie J Okoye
- Department of Pharmacognosy, Faculty of Pharmacy, University of Benin, Benin City, Nigeria.
| | - Freddy O Agoreyo
- Department of Physiology, College of Medical Sciences, University of Benin, Benin City, Nigeria.
| | - Gerald I Eze
- Department of Anatomy, College of Medical Sciences, University of Benin, Benin City, Nigeria.
| | - Rose I Jesuorobo
- Department of Pharmacognosy, Faculty of Pharmacy, University of Benin, Benin City, Nigeria.
| | - Clement O Egharevba
- Department of Pharmacognosy, Faculty of Pharmacy, University of Benin, Benin City, Nigeria.
| | - Pauline O Aimator
- Department of Pharmacognosy, Faculty of Pharmacy, University of Benin, Benin City, Nigeria.
| |
Collapse
|
20
|
Andreotti C, King AA, Macy E, Compas BE, DeBaun MR. The Association of Cytokine Levels With Cognitive Function in Children With Sickle Cell Disease and Normal MRI Studies of the Brain. J Child Neurol 2015; 30:1349-53. [PMID: 25512362 PMCID: PMC4466214 DOI: 10.1177/0883073814563140] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 11/11/2014] [Indexed: 01/21/2023]
Abstract
Children with sickle cell disease, including those without evidence for cerebral infarcts, are at increased risk for cognitive deficits that can contribute to difficulties in academic and social functioning. Chronic inflammatory processes are endemic to sickle cell disease and are apparent in common comorbidities including asthma. Cytokines mediating inflammatory processes can influence cognition. The authors examined the relationship between plasma levels of cytokines commonly associated with asthma and cognitive functioning using standardized neuropsychological measures in 25 children with sickle cell disease with normal magnetic resonance imaging studies of the brain. Children with sickle cell disease performed significantly below the normative mean on tests of cognitive function. Pearson correlations indicated significant negative relations between cytokines (IL-4, IL-5, IL-8, and IL-13) and standardized tests of executive function (r = -.54 to -.74). Preliminary evidence suggests an association between cytokine levels and executive function in children with sickle cell disease, indicating a potential role for inflammatory processes in cognitive outcomes in these children.
Collapse
Affiliation(s)
- Charissa Andreotti
- Department of Psychology and Human Development, Vanderbilt University, Nashville, TN, USA Department of Psychiatry and Behavioral Sciences, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Allison A King
- Program in Occupational Therapy and Division of Pediatric Hematology-Oncology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - Elizabeth Macy
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Bruce E Compas
- Department of Psychology and Human Development, Vanderbilt University, Nashville, TN, USA
| | - Michael R DeBaun
- Division of Hematology-Oncology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| |
Collapse
|
21
|
Marano M, Quattrocchi C, Annibali O, Avvisati G, Di Lazzaro V. Recurrent Large Volume Silent Strokes in Sickle Cell Disease. J Stroke Cerebrovasc Dis 2014; 23:e453-e455. [DOI: 10.1016/j.jstrokecerebrovasdis.2014.06.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 06/11/2014] [Accepted: 06/25/2014] [Indexed: 02/01/2023] Open
|
22
|
Abstract
At least 25% of individuals with sickle cell disease will have a neurological complication over their lifetime, often as early as in childhood. Neuroradiological findings in patients with sickle cell disease are common and include acute territorial infarction, silent ischaemia and intracranial haemorrhage. Imaging abnormalities are typically, but not always, manifestations of the underlying vasculopathy. Coexisting acute and chronic pathology may pose challenges to interpretation.
Collapse
Affiliation(s)
- S C Thust
- 1 St Thomas Hospital, Guy's and St Thomas' Hospitals NHS Foundation Trust, Radiology Department, London, UK
| | | | | |
Collapse
|
23
|
Mallick AA, O’Callaghan FJK. Risk factors and treatment outcomes of childhood stroke. Expert Rev Neurother 2014; 10:1331-46. [DOI: 10.1586/ern.10.106] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
24
|
EXAMINER executive function battery and neurologic morbidity in pediatric sickle cell disease. J Int Neuropsychol Soc 2014; 20:29-40. [PMID: 24280593 DOI: 10.1017/s1355617713001239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Sickle cell disease (SCD) is blood disorder with a high risk for cerebral vascular morbidities that impact neurocognitive functioning. Specific cognitive abilities are known to be more sensitive to neurologic effects of SCD than IQ scores, yet there is little consensus about which measures to use to assess neurocognitive functioning. We evaluated the ability of the Executive Abilities: Methods and Instruments for Neurobehavioral Evaluation and Research (EXAMINER) Battery to detect neurologic effects in SCD. Thirty-two youth with SCD and sixty demographically-matched comparison youth completed the EXAMINER Battery and selected tests from the Woodcock-Johnson Tests of Cognitive Ability, 3rd edition (WJ-III). Neurologic severity was examined via clinical history for morbidities and midsagittal corpus callosum (CC) area. Results indicated cognitive performance decreased with increasing neurologic morbidity across all cognitive measures; two of four EXAMINER factors were related to CC area. The association with clinical history and midsagittal CC area appeared at least as large for the Examiner Battery scores as for the WJ-III measures. The Examiner Battery showed sensitivity to neurologic history and white matter effects in SCD; this new measure compares favorably to established measures of disease-related neurocognitive effects, but would benefit from further development.
Collapse
|
25
|
Deus-Silva L, Bonilha L, Damasceno BP, Costa ALF, Yasuda CL, Costa FF, Santos AO, Etchebehere ECSC, Oquendo-Nogueira R, Fockink R, de Freitas CF, Camargo EE, Li LM, Cendes F, Saad ST. Brain Perfusion Impairment in Neurologically Asymptomatic Adult Patients with Sickle-Cell Disease Shown by Voxel-Based Analysis of SPECT Images. Front Neurol 2013; 4:207. [PMID: 24391625 PMCID: PMC3869238 DOI: 10.3389/fneur.2013.00207] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Accepted: 12/08/2013] [Indexed: 11/13/2022] Open
Abstract
Cerebrovascular lesions are frequently observed in patients with sickle-cell disease (SCD) and these structural lesions are preceded by insidious perfusion deficits. Our aim was to investigate the presence of brain perfusion deficits in neurologically asymptomatic SCD patients, especially affecting microvessels. For this study, 42 SCD patients [33 sickle-cell anemia (HbSS), 6 sickle hemoglobin C disease (HbSC), and 3 sickle β-thalassemia disease (HbSβ)] with mean hematocrit of 25.1 (±4.85; 15.6–38.5) underwent brain perfusion single photon emission computerized tomography (SPECT) using the tracer 99mTc-ECD. Images from SCD patients were compared to images of a healthy control group (29 females and 20 males, mean age 31 ± 8; range 25–49 years). Images underwent voxel-wise comparison of regional tracer uptake using paired t-test to estimate the probability of each voxel to have an increased or decreased tracer uptake. When compared to controls, SCD patients exhibited significantly reduced tracer uptake in basal ganglia and thalami, the anterior frontal region and the watershed region of the temporo-parietal-occipital transition (p < 0.05). Our study showed that neurologically asymptomatic adult SCD patients exhibit a pattern of reduced 99mTc-ECD tracer uptake demonstrated by SPECT. Early diagnosis of this cerebral vasculopathy has prognostic implications and can be determinant in considering therapeutic alternatives to avoid increasing brain lesion load and progressive disability.
Collapse
Affiliation(s)
| | - Leonardo Bonilha
- Division of Neurology, Department of Neurosciences, Medical University of South Carolina , Charleston, SC , USA
| | | | - Andre L F Costa
- Department of Neurology, University of Campinas , Campinas , Brazil ; Department of Orthodontics, City University of São Paulo , São Paulo , Brazil
| | | | - Fernando F Costa
- Hematology and Hemotherapy Center, University of Campinas , Campinas , Brazil
| | - Allan O Santos
- Division of Nuclear Medicine, Department of Radiology, University of Campinas , Campinas , Brazil
| | - Elba C S C Etchebehere
- Division of Nuclear Medicine, Department of Radiology, University of Campinas , Campinas , Brazil
| | - Regis Oquendo-Nogueira
- Division of Nuclear Medicine, Department of Radiology, University of Campinas , Campinas , Brazil
| | - Renata Fockink
- Division of Nuclear Medicine, Department of Radiology, University of Campinas , Campinas , Brazil
| | | | - Edwaldo E Camargo
- Division of Nuclear Medicine, Department of Radiology, University of Campinas , Campinas , Brazil
| | - Li M Li
- Department of Neurology, University of Campinas , Campinas , Brazil
| | - Fernando Cendes
- Department of Neurology, University of Campinas , Campinas , Brazil
| | - Sara T Saad
- Hematology and Hemotherapy Center, University of Campinas , Campinas , Brazil
| |
Collapse
|
26
|
Solomou E, Kraniotis P, Kourakli A, Petsas T. Extent of silent cerebral infarcts in adult sickle-cell disease patients on magnetic resonance imaging: is there a correlation with the clinical severity of disease? Hematol Rep 2013; 5:8-12. [PMID: 23888239 PMCID: PMC3719106 DOI: 10.4081/hr.2013.e3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 12/11/2012] [Accepted: 01/07/2013] [Indexed: 11/22/2022] Open
Abstract
The aim of this paper is to correlate the extent of silent cerebral infarcts (SCIs) on magnetic resonance imaging (MRI) with the clinical severity of sickle cell disease (SCD) in adult patients. Twenty-four consecutive adult asymptomatic SCD patients (11 male and 13 female) with a mean age of 38.4 years (range 20-59) were submitted to brain MRI on a 1 Tesla Gyroscan Intera, Philips MR scanner with a dedicated head coil. The protocol consisted of TSE T2-weighted and FLAIR images on the axial and coronal planes. MRI readings were undertaken by two radiologists and consensus readings. Patients were compound heterozygotes (HbS/β-thal). The extent of SCIs was classified from 0-2 with 0 designating no lesions. Clinical severity was graded as 0-2 by the hematologist, according to the frequency and severity of vaso-occlusive crises. There was no statistically significant correlation between the severity of clinical disease and the extent of SCIs on MR imaging. The extent of SCI lesions did not differ statistically between younger and older patients. Patients receiving hydroxyurea had no statistically significant difference in the extent of SCI lesions. The extent of SCIs in heterozygous (HbS/β-thal) SCD patients is not age related and may be quite severe even in younger (<38.4 years) patients. However the extent of SCIs is not correlated with the severity of clinical disease.
Collapse
|
27
|
Abstract
BACKGROUND Previous studies of healthy children have indicated a link between autonomic nervous system (ANS) reactivity and health outcomes, but there is limited research on whether ANS reactivity is similar for children with chronic conditions. OBJECTIVE The aim of this study was to determine if ANS reactivity differs for children with sickle cell disease (SCD) compared with a community sample of children without SCD. METHOD In two cross-sectional, descriptive studies, 32 public school children without chronic health problems were compared with 33 children with SCD. The children were 5-8 years old and they completed standardized protocols measuring ANS responses (respiratory sinus arrhythmia and preejection period) during rest and challenge conditions in social, cognitive, sensory, and emotion domains. Reactivity was calculated as the difference between challenge response minus rest for each domain and overall. RESULTS There were differences in the distributions of the samples in parent education and child age, so these variables were adjusted for in subsequent analyses. The community sample showed parasympathetic withdrawal (low respiratory sinus arrhythmia scores) and greater parasympathetic reactivity (low respiratory sinus arrhythmia difference scores and percentage of negative scores) compared with the children with SCD in the social (p < .05) and sensory (p < .05) domains. The children with SCD showed greater sympathetic reactivity (low preejection period difference scores) compared with the community children in the cognitive domain (p < .05), and a greater percentage of children with SCD versus the community children showed negative preejection period difference scores (sympathetic reactivity) in the social domain (p < .05). The community sample, but not the children with SCD, showed changes in respiratory sinus arrhythmia across domains (p < .05). DISCUSSION Children with SCD may display a different pattern of ANS responses to laboratory challenges compared with children without SCD from the same community.
Collapse
|
28
|
Ciccone S, Cappella M, Borgna-Pignatti C. Ischemic stroke in infants and children: practical management in emergency. Stroke Res Treat 2011; 2011:736965. [PMID: 21776365 PMCID: PMC3138064 DOI: 10.4061/2011/736965] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 04/27/2011] [Accepted: 05/02/2011] [Indexed: 11/20/2022] Open
Abstract
Stroke is a rare disease in children, with an estimated incidence 13/100000 and a significant impact on morbidity and mortality. Clinical presentation and risk factors, present in almost half of pediatric patients, are not the same as in adults. The diagnosis of stroke in children is often delayed because signs and symptoms can be subtle and nonspecific. History and clinical examination should exclude underlying diseases or predisposing factors. Neuroimaging is crucial in defining diagnosis. Other tests might be necessary, according to the clinical picture. We present here the most recent practical directions on how to diagnose and manage arterial stroke in children, according to different international guidelines on the subject.
Collapse
Affiliation(s)
- Sara Ciccone
- Department of Clinical and Experimental Medicine-Pediatrics, University of Ferrara, 44121 Ferrara, Italy
| | | | | |
Collapse
|
29
|
Lanni G, Catalucci A, Conti L, Di Sibio A, Paonessa A, Gallucci M. Pediatric stroke: clinical findings and radiological approach. Stroke Res Treat 2011; 2011:172168. [PMID: 21603166 PMCID: PMC3095895 DOI: 10.4061/2011/172168] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Accepted: 02/16/2011] [Indexed: 12/13/2022] Open
Abstract
This paper focuses on radiological approach in pediatric stroke including both ischemic stroke (Arterial Ischemic Stroke and Cerebral Sinovenous Thrombosis) and hemorrhagic stroke. Etiopathology and main clinical findings are examined as well. Magnetic Resonance Imaging could be considered as the first-choice diagnostic exam, offering a complete diagnostic set of information both in the discrimination between ischemic/hemorrhagic stroke and in the identification of underlying causes. In addition, Magnetic Resonance vascular techniques supply further information about cerebral arterial and venous circulation. Computed Tomography, for its limits and radiation exposure, should be used only when Magnetic Resonance is not available and on unstable patients.
Collapse
Affiliation(s)
- Giuseppe Lanni
- Department of Neuroradiology, S.Salvatore Hospital, University of L'Aquila, Via Vetoio, Coppito, 67100 L'Aquila, Italy
| | | | | | | | | | | |
Collapse
|
30
|
Lopez-Vicente M, Ortega-Gutierrez S, Amlie-Lefond C, Torbey MT. Diagnosis and management of pediatric arterial ischemic stroke. J Stroke Cerebrovasc Dis 2010; 19:175-183. [PMID: 20434043 DOI: 10.1016/j.jstrokecerebrovasdis.2009.03.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 03/13/2009] [Accepted: 03/26/2009] [Indexed: 01/07/2023] Open
Abstract
Pediatric stroke is among the top 10 causes of death in children and an important cause of chronic morbidity, with an incidence of 3.3/100,000 children/year. Risk factors associated with stroke in children include cardiac diseases, hematologic and vascular disorders, and infection. Clinical presentation varies depending on age, underlying cause, and stroke location. Antithrombotics and anticoagulants are used in the treatment of pediatric stroke; however, there are no established guidelines for the use of these agents in children. In this article we review the cause, pathophysiology, clinical presentation, diagnosis, acute management, secondary prevention, and outcome of children with stroke. The approach to patients with sickle cell disease and Moyamoya disease is also discussed. Up to date studies to determine the optimal acute treatment of childhood stroke and secondary prevention and risk factor modification are critically needed.
Collapse
Affiliation(s)
- Marta Lopez-Vicente
- Department of Family and Community Medicine, Medical College of Wisconsin, Milwaukee.
| | - Santiago Ortega-Gutierrez
- Department of Neurology, Medical College of Wisconsin, Milwaukee; Department of Medicine, Medical College of Wisconsin, Milwaukee
| | | | - Michel T Torbey
- Department of Neurology, Medical College of Wisconsin, Milwaukee; Department of Neurosurgery, Medical College of Wisconsin, Milwaukee
| |
Collapse
|
31
|
McCauley SR, Pedroza C. Event-based prospective memory in children with sickle cell disease: effect of cue distinctiveness. Child Neuropsychol 2010; 16:293-312. [PMID: 20301010 DOI: 10.1080/09297041003601470] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Event-based prospective memory (EB-PM) is the formation of an intention and remembering to perform it in response to a specific event. Currently, EB-PM performance in children with sickle cell disease (SCD) is unknown. In this study, we designed a computer-based task of EB-PM; No-Stroke, Silent-Infarct, and Overt-Stroke groups performed significantly below the demographically similar control group without SCD. Cue distinctiveness was varied to determine if EB-PM could be improved. All groups, with the exception of the Overt-Stroke group, performed significantly better with a perceptually distinctive cue. Overall, these results suggest that EB-PM can be improved significantly in many children with SCD.
Collapse
Affiliation(s)
- Stephen R McCauley
- Physical Medicine and Rehabilitation Alliance of Baylor College of Medicine and the University of Texas Medical School at Houston, Houston, TX 77030, USA.
| | | |
Collapse
|
32
|
Abstract
We investigated the association of increased cerebral blood flow velocity with specific language abilities in children with sickle cell disease (SCD). Thirty-nine children ages 5 to 8 years old with high-risk genotypes of SCD underwent cognitive testing, which included tests of language skills, visual motor skills, and attention/working memory as part of a routine hematology health-maintenance visit. Transcranial Doppler (TCD) velocities were obtained from review of medical records, with the velocities that were in closest temporal proximity to the cognitive assessment used in the analysis. TCD velocities predicted scores on tests of syntactical skills, even when controlling for anemia severity. Semantic and phonological ability and other cognitive skills were not strongly related to TCD velocities. Elevated blood flow velocities in children with high-risk SCD may contribute to a specific language impairment or to a broader dysfunction of short-term and/or working memory. This study underscores the need for clinicians to monitor language skills of children with SCD who have elevated TCD velocities, as these cognitive abilities might be particularly sensitive to cerebrovascular disruption related to their disease.
Collapse
|
33
|
Bühler R, Mattle HP. Hematological diseases and stroke. HANDBOOK OF CLINICAL NEUROLOGY 2009; 93:887-934. [PMID: 18804686 DOI: 10.1016/s0072-9752(08)93045-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Robert Bühler
- Department of Neurology, Iselspital, University of Bern, Bern, Switzerland
| | | |
Collapse
|
34
|
Correction of murine sickle cell disease using gamma-globin lentiviral vectors to mediate high-level expression of fetal hemoglobin. Mol Ther 2008; 17:245-52. [PMID: 19050697 DOI: 10.1038/mt.2008.259] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Increased levels of red cell fetal hemogloblin, whether due to hereditary persistence of expression or from induction with hydroxyurea therapy, effectively ameliorate sickle cell disease (SCD). Therefore, we developed erythroid-specific, gamma-globin lentiviral vectors for hematopoietic stem cell (HSC)-targeted gene therapy with the goal of permanently increasing fetal hemoglobin (HbF) production in sickle red cells. We evaluated two different gamma-globin lentiviral vectors for therapeutic efficacy in the BERK sickle cell mouse model. The first vector, V5, contained the gamma-globin gene driven by 3.1 kb of beta-globin regulatory sequences and a 130-bp beta-globin promoter. The second vector, V5m3, was identical except that the gamma-globin 3'-untranslated region (3'-UTR) was replaced with the beta-globin 3'-UTR. Adult erythroid cells have beta-globin mRNA 3'-UTR-binding proteins that enhance beta-globin mRNA stability and we postulated this design might enhance gamma-globin expression. Stem cell gene transfer was efficient and nearly all red cells in transplanted mice expressed human gamma-globin. Both vectors demonstrated efficacy in disease correction, with the V5m3 vector producing a higher level of gamma-globin mRNA which was associated with high-level correction of anemia and secondary organ pathology. These data support the rationale for a gene therapy approach to SCD by permanently enhancing HbF using a gamma-globin lentiviral vector.
Collapse
|
35
|
La prévention des accidents vasculaires cérébraux chez les malades drépanocytaires. Résultats, problèmes et avenir. BULLETIN DE L ACADEMIE NATIONALE DE MEDECINE 2008. [DOI: 10.1016/s0001-4079(19)32688-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
36
|
Ullrich H, Fischer R, Grosse R, Kordes U, Schubert C, Altstadt B, Andreu G. Erythrocytapheresis: Do Not Forget a Useful Therapy! Transfus Med Hemother 2008; 35:24-30. [PMID: 21547107 DOI: 10.1159/000112044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Accepted: 10/09/2007] [Indexed: 01/22/2023] Open
Abstract
SUMMARY: In patients with pathologically altered erythrocytes, red blood cell exchange is a very efficient therapeutic measure without important side effects. With increasing migration more patients with e.g. severe malaria or sickle cell anemia have to be treated. In minor or bidirectional ABO-mismatched stem cell transplantations after reduced intensity conditioning, hemolysis can be prevented by prophylactic erythrocytapheresis. Other rare indications for red blood cell exchange are advanced erythropoietic protoporphyria and babesiosis. Sickle cell anemia can be treated with hydroxyurea. Transfusions are administered when necessary, but this results in iron overload in the long term. An expensive but safe and very efficient treatment alternative is red blood cell exchange. In cases with stroke, acute chest syndrome and other severe complications, erythrocytapheresis reproducibly breaks the vicious circle of sickling and increasing oxygen deficiency. At the same time one can aim at an exact end hematocrit. In severe malaria, erythrocytapheresis both reduces parasite load to the designated extent and reconstitutes reduced oxygen transport capacity without serious adverse effects. Here we describe our experience of erythrocytapheresis in long-term prophylaxis of complications in sickle cell anemia and sickle cell thalassemia patients. The documentation of improved iron balance was carried out by liver susceptometry.
Collapse
Affiliation(s)
- Heidrun Ullrich
- Department of Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | | | | | | | | | | |
Collapse
|
37
|
Madani G, Papadopoulou AM, Holloway B, Robins A, Davis J, Murray D. The radiological manifestations of sickle cell disease. Clin Radiol 2007; 62:528-38. [PMID: 17467389 DOI: 10.1016/j.crad.2007.01.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2006] [Revised: 12/20/2006] [Accepted: 01/02/2007] [Indexed: 11/29/2022]
Abstract
Sickle cell disease (SCD) is an inherited abnormality of the beta-globin chain, which causes a spectrum of haemolytic anaemias. Clinical manifestations in SCD include anaemia, jaundice, recurrent vaso-occlusive crises, and infections (particularly by encapsulated bacteria) due to functional asplenia and cerebrovascular accidents. Radiological investigations play a critical role both in the diagnosis and in the primary prevention of the complications of SCD.
Collapse
Affiliation(s)
- G Madani
- Department of Radiology, Royal Free Hospital NHS Trust, London, UK.
| | | | | | | | | | | |
Collapse
|
38
|
Berkelhammer LD, Williamson AL, Sanford SD, Dirksen CL, Sharp WG, Margulies AS, Prengler RA. Neurocognitive sequelae of pediatric sickle cell disease: a review of the literature. Child Neuropsychol 2007; 13:120-31. [PMID: 17364569 DOI: 10.1080/09297040600800956] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This literature review summarizes all studies relating neuropsychological performance to neuroimaging findings in pediatric sickle cell disease (N=28; published 1991-2005). Although inconsistencies exist within and across domains, deficits in intelligence (IQ), attention and executive functions, memory, language, visuomotor abilities, and academic achievement have been identified. Overall neurocognitive compromise was revealed to be related to the level of neurological injury and the location of silent infarct. Attentional and executive dysfunction is prevalent and related to frontal lobe abnormalities.
Collapse
Affiliation(s)
- Leslie D Berkelhammer
- Division of Behavioral Medicine, St. Jude Children's Research Hospital. Memphis, TN 38105-2794, USA.
| | | | | | | | | | | | | |
Collapse
|
39
|
Wong WY, Powars DR. Overt and Incomplete (Silent) Cerebral Infarction in Sickle Cell Anemia: Diagnosis and Management. Neuroimaging Clin N Am 2007; 17:269-80. [PMID: 17645976 DOI: 10.1016/j.nic.2007.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cerebral vasculopathy in sickle cell anemia (HbSS) is manifest clinically as cerebral infarction and intracranial hemorrhage. The type of stroke, ischemic or hemorrhagic, is age specific with distinct differences in outcomes. Cerebral infarction with or without clinical stroke begins during early childhood and rarely causes death immediately.
Collapse
Affiliation(s)
- Wing-Yen Wong
- Department of Pediatrics, Division of Hematology/Oncology, Children's Hospital Los Angeles, Keck School of Medicine at the University of Southern California, Los Angeles, CA 90033, USA
| | | |
Collapse
|
40
|
Makani J, Williams TN, Marsh K. Sickle cell disease in Africa: burden and research priorities. ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY 2007; 101:3-14. [PMID: 17244405 PMCID: PMC5612390 DOI: 10.1179/136485907x154638] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sickle cell disease (SCD) has recently been recognised as a problem of major public-health significance by the World Health Organization. Despite the fact that >70% of sufferers live in Africa, expenditure on the related care and research in the continent is negligible, and most advances in the understanding and management of this condition have been based on research conducted in the North. In order to target limited resources, African countries need to focus research and interventions on areas that will lead to the maximum impact. This review details the epidemiological and clinical background of SCD, with an emphasis on Africa, before identifying the research priorities that will provide the necessary evidence base for improving the management of African patients. Malaria, bacterial and viral infections and cerebrovascular accidents are areas in which further research may lead to a significant improvement in SCD-related morbidity and mortality. As patients with high concentrations of foetal haemoglobin (HbF) appear to be protected from all but mild SCD, the various factors and pharmacological agents that might increase HbF levels need to be assessed in Africa, as options for interventions that would improve quality of life and reduce mortality.
Collapse
Affiliation(s)
- J Makani
- Department of Haematology and Blood Transfusion, Muhimbili University College of Health Sciences, P.O. Box 65001, Dar es Salaam, Tanzania.
| | | | | |
Collapse
|
41
|
Ausavarungnirun P, Sabio H, Kim J, Tegeler CH. Dynamic Vascular Analysis Shows a Hyperemic Flow Pattern in Sickle Cell Disease. J Neuroimaging 2006; 16:311-7. [PMID: 17032379 DOI: 10.1111/j.1552-6569.2006.00053.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND By the age of 20 years, 10% of sickle cell disease (SCD) patients have experienced a stroke. It is unclear if SCD stroke is due primarily to hemodynamic effects of intracranial stenosis, or metabolic failure from anemia. Transcranial Doppler ultrasound (TCD) identifies a SCD subgroup with high stroke risk, but high mean flow velocity (MFV) can be due to stenosis or high flow rate, as with metabolic hyperemia of severe anemia. Dynamic Vascular Analysis (DVA; New Health Sciences, Inc., Bethesda, MD) is a new way to analyze TCD data, with potential to separate structural from metabolic causes of high MFV. METHODS Eighty SCD patients, regardless of hemoglobin genotypes, aged 2 to 22 years, without clinical stroke or transient ischemic attack (TIA), who had TCD (1/1/02 to 1/1/04) as part of routine outpatient clinical follow-up, with both the TCD report and study videotape available, were included. Waveforms were reviewed and marked by protocol, and DVA indices calculated including MFV, pulsatility index (PI), systolic acceleration (SA), dynamic flow index (DFI), dynamic pressure index (DPI), and dynamic compliance index (DCI). Mean and standard deviation were defined for the whole group, and for four subgroups, by age. RESULTS MFV, DFI, and DPI were highest at 6- to 9-year-olds, declining thereafter. The 14- to 22-year-old group was also compared to a group of healthy young athletes (15- to 22 years old). SCD patients had higher MFV, lnSA, DFI, DPI, and lower PI and DCI in most segments, suggesting global hyperemia. CONCLUSION This is the first report of cross-sectional results of DVA in a cohort of SCD outpatients without prior clinical stroke (TIA). These results suggest hyperemia without significant focal intracranial stenosis. There were also differences between asymptomatic SCD and young athletes, and the MFV, DFI, and DPI were highest at the age of 6 to 9 years, decreasing as age increased.
Collapse
|
42
|
Razvi SSM, Bone I. Single gene disorders causing ischaemic stroke. J Neurol 2006; 253:685-700. [PMID: 16807686 DOI: 10.1007/s00415-006-0048-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2005] [Revised: 08/04/2005] [Accepted: 09/23/2005] [Indexed: 10/24/2022]
Abstract
Stroke is the third most common cause of death and the leading cause of long-term neurological disability in the world. Conventional vascular risk factors for stroke contribute approximately to only forty to fifty percent of stroke risk. Genetic factors may therefore contribute to a significant proportion of stroke and may be polygenic, monogenic or multi-factorial. Monogenic (single gene) disorders may potentially account for approximately one percent of all ischaemic stroke. Monogenic stroke disorders include conditions such as cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy (CARASIL) and hereditary endotheliopathy, retinopathy, nephropathy and stroke (HERNS). In addition, other monogenic conditions such as sickle cell and Fabry disease also lead to stroke. These monogenic disorders cause either small vessel or large vessel stroke (or a combination of both) and serve as useful models for understanding and studying conventional stroke and cerebrovascular disease and its accompaniments such as vascular dementia.
Collapse
Affiliation(s)
- Saif S M Razvi
- Department of Neurology, Institute of Neurological Sciences, Southern General Hospital, 1345 Govan Road, Glasgow G51 4TF, UK
| | | |
Collapse
|
43
|
Pearson SR, Alkon A, Treadwell M, Wolff B, Quirolo K, Boyce WT. Autonomic reactivity and clinical severity in children with sickle cell disease. Clin Auton Res 2006; 15:400-7. [PMID: 16362543 DOI: 10.1007/s10286-005-0300-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2005] [Accepted: 06/08/2005] [Indexed: 10/25/2022]
Abstract
Individual differences in autonomic nervous system reactivity have been studied in relation to physical and mental health outcomes, but rarely among children with chronic disease. The purpose of this study was to examine the associations among autonomic reactivity, clinical severity, family stressors, and mental health symptoms in children with homozygous sickle cell disease. Nineteen children with homozygous sickle cell disease participated in a cross-sectional study involving parent-completed measures, medical record reviews and laboratory-based measures of autonomic nervous system responses to social, cognitive, physical and emotional challenges. Autonomic reactivity was significantly associated with both clinical severity and externalizing behavior symptoms. Children with greater parasympathetic withdrawal during challenges compared to rest had significantly more severe disease (r = -0.45, p < 0.05); greater sympathetic activation during challenges compared to rest was associated with more externalizing behavior symptoms ( r= 0.44, p < 0.05). Children experiencing major family stressors had internalizing behavior symptoms but no difference in autonomic reactivity or clinical severity compared to children experiencing fewer family stressors. Individual differences in autonomic reactivity may offer a new, biologically plausible account for observed variation in painful episodes, other physical complications and behavioral symptoms among children with sickle cell disease.
Collapse
Affiliation(s)
- Sarah R Pearson
- School of Public Health, University of California, Berkeley, 94720-1190, USA
| | | | | | | | | | | |
Collapse
|
44
|
Kedar A, Drane WE, Shaeffer D, Nicole M, Adams C. Measurement of cerebrovascular flow reserve in pediatric patients with sickle cell disease. Pediatr Blood Cancer 2006; 46:234-8. [PMID: 16007581 DOI: 10.1002/pbc.20475] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
PURPOSE To report a method for determining absolute percentage change in cerebral blood flow (measurement of cerebrovascular reserve) before and after acetylazolamide (Diamox) administration in children with sickle cell anemia. MATERIALS AND METHODS Thirty-six symptomatic sickle cell disease patients (48 studies) were evaluated. After the injection of either Tc-99m bicisate ethyl cysteinate dimer (ECD) or hexamethyl propylene amine oxime (HMPAO), both whole body scans (with geometric mean correction) and single photon emission computed tomography (CT) were performed pre- and post-Diamox administration with calculation of percentage brain uptake on the whole body images for both examinations and determination of cerebrovascular reserve (percentage change in brain uptake post-Diamox). Evaluation for regional cerebral perfusion change was also performed. RESULTS The cerebrovascular reserve measurement was 17.6% +/- 43.5% (mean +/- 1 SD). Thirty-three of 48 studies (69%) showed an abnormal cerebrovascular reserve, while only 6 of 48 studies (12.5%) showed Diamox-induced regional perfusion changes in the brain. No statistically significant relationship was found between the occurrence of a regional perfusion abnormality versus loss of cerebrovascular reserve (P = 0.75, Fisher exact test), suggesting that these are independent variables. The cerebrovascular reserve was reproducible, with an average standard deviation of +/-0.54%. CONCLUSION A new, simple method for calculation of cerebrovascular reserve is presented; this method is reproducible and appears to be an independent variable in the evaluation of cerebrovascular status in sickle cell anemia patients. It should allow further characterization of this complex patient population, and possibly assist in detection of patients at risk for developing "silent" or overt stroke.
Collapse
Affiliation(s)
- Amos Kedar
- Department of Pediatrics, Division of Pediatric Hematology/Oncology, University of Florida College of Medicine, Gainesville, Florida 32610-0296, USA.
| | | | | | | | | |
Collapse
|
45
|
Kral MC, Brown RT, Connelly M, Curé JK, Besenski N, Jackson SM, Abboud MR. Radiographic predictors of neurocognitive functioning in pediatric Sickle Cell disease. J Child Neurol 2006; 21:37-44. [PMID: 16551451 DOI: 10.1177/08830738060210010701] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We compared magnetic resonance imaging (MRI), magnetic resonance angiography, and transcranial Doppler ultrasonography as predictors of specific neurocognitive functions in children with sickle cell disease. Participants were 27 children with sickle cell anemia (hemoglobin SS) who were participants in the Stroke Prevention Trial in Sickle Cell Anemia (STOP) and had no documented history of stroke. Children's MRIs were classified as normal or silent infarct, and their magnetic resonance angiograms were classified as normal or abnormal. The highest time-averaged mean flow velocity on transcranial Doppler ultrasonographic examination of the major cerebral arteries was analyzed. Age and hematocrit also were analyzed as predictor variables. The battery of neurocognitive tests included measures of intellectual functioning, academic achievement, attention, memory, visual-motor integration, and executive functions. MRI, magnetic resonance angiography, transcranial Doppler ultrasonography, age, and hematocrit were analyzed as predictors of participants' performance on the various measures of neurocognitive functioning. Age and hematocrit were robust predictors of a number of global and specific neurocognitive functions. When age and hematocrit were controlled, transcranial Doppler ultrasonography was a significantly unique predictor of verbal memory. We found an association between low hemoglobin and neurocognitive impairment. We also found that abnormalities on transcranial Doppler ultrasonography can herald subtle neurocognitive deficits. (J Child Neurol 2006;21:37-44).
Collapse
Affiliation(s)
- Mary C Kral
- Department of Pediatrics, Medical University of South Carolina, Charleston, 29425, USA.
| | | | | | | | | | | | | |
Collapse
|
46
|
Schatz J, Buzan R. Decreased corpus callosum size in sickle cell disease: relationship with cerebral infarcts and cognitive functioning. J Int Neuropsychol Soc 2006; 12:24-33. [PMID: 16433941 DOI: 10.1017/s1355617706060085] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2005] [Revised: 10/17/2005] [Accepted: 10/17/2005] [Indexed: 11/07/2022]
Abstract
We assessed midsagittal corpus callosum size in sickle cell disease (SCD) and its relationship to lesion volume, lesion location, and cognitive functioning. Twenty-eight children with SCD and 16 demographic controls completed magnetic resonance imaging (MRI) and neuropsychological testing. Corpus callosum (CC) size was smaller for children with silent infarcts (n = 8) or overt stroke (n = 8) than for those without visible infarcts (n = 12) or control participants. Lesion volume was a robust predictor of IQ and other cognitive scores; total CC size did not typically add explanatory power for these measures. The size of the rostral body of the CC, however, independently predicted measures of distractibility, speeded production, and working memory. Posterior CC size was also decreased among many of the children with SCD, even in the absence of visible infarcts in this region. Brain morphology appears to provide additional information about SCD-related effects on the brain above and beyond visible infarcts.
Collapse
Affiliation(s)
- Jeffrey Schatz
- Department of Psychology, University of South Carolina, Columbia, South Carolina 29208, USA.
| | | |
Collapse
|
47
|
Wong WY, Powars DR. Overt and Incomplete (Silent) Cerebral Infarction in Sickle Cell Anemia: Diagnosis and Management. Hematol Oncol Clin North Am 2005; 19:839-55, vi. [PMID: 16214647 DOI: 10.1016/j.hoc.2005.07.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Regional complete infarctions in children with sickle cell anemia (HbSS) are often associated with stenosis of the large intracranial arteries and result in lifetime disability. Incomplete infarction occurs more frequently than previously recognized and has far-reaching effects on neurocognitive development and the risk for overt secondary strokes into adulthood. Clinical and neuroimaging modalities have been highlighted in an algorithmic approach, with the studies giving the highest yield in results and most likely to be available listed in sequential order. The recognition of an emerging "second peak" incidence in the third decade of life is worrisome and warrants more intense scrutiny and diagnosis of subtle findings of stroke in this young adult population.
Collapse
Affiliation(s)
- Wing-Yen Wong
- Department of Pediatrics, Division of Hematology/Oncology, Children's Hospital Los Angeles, Keck School of Medicine at the University of Southern California, Los Angeles, CA, USA
| | | |
Collapse
|
48
|
Makani J. Stroke in sickle cell disease in Africa: case report. EAST AFRICAN MEDICAL JOURNAL 2005; 81:657-9. [PMID: 15868983 PMCID: PMC5612386 DOI: 10.4314/eamj.v81i12.9253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Stroke, including asymptomatic cerebrovascular events, is a significant cause of morbidity and mortality in sickle cell disease, occurring with an incidence of 10 to 25%. Extensive research has established that cerebral stenosis, involving the circle of Willis, is the most common mechanism in children. We report a child with sickle cell disease who presented with cortical blindness and right-sided hemiplegia. Computerised tomography of the brain revealed an infarct involving the left parietal region and extending to the occipital region. Stroke in SCD is multifactorial, but high-risk individuals can be identified by simple well-established strategies such as transcranial doppler ultrasonography. There are approaches for both primary and secondary interventions, which have been shown to be effective and need to be incorporated into management guidelines for SCD patients. Before schemes are recommended into health care policies, research in the appropriate setting is required.
Collapse
Affiliation(s)
- J Makani
- Department of Internal Medicine, Muhimbili University College of Health Sciences, P. O. Box 65001, Dar es Salaam, Tanzania
| |
Collapse
|
49
|
Treadwell MJ, Law AW, Sung J, Hackney-Stephens E, Quirolo K, Murray E, Glendenning GA, Vichinsky E. Barriers to adherence of deferoxamine usage in sickle cell disease. Pediatr Blood Cancer 2005; 44:500-7. [PMID: 15602707 DOI: 10.1002/pbc.20290] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND We hypothesized that child cognitive disability would be a significant risk factor for non-adherence with home deferoxamine (DFO) administration and that a factor that would contribute to improved adherence would be sharing of responsibilities for chelation between parents and patients. We explored the influences on adherence of behavioral and psychological adjustment; family stress; perceived convenience of and satisfaction with the DFO regimen; and parent and patient knowledge about DFO. PROCEDURE Fifteen pediatric patients with sickle cell disease (SCD) who had evidence of excessive iron stores, and their parents, were interviewed about adherence and responsibility for chelation therapy. A neuropsychological assessment battery was administered to the patients. Family stress, the child's emotional and behavioral status, knowledge about chelation and iron overload were explored. Adherence was rated objectively using pharmacy refill patterns and observable signs of chelation. RESULTS Sharing of responsibilities for chelation between parents and children was related to better adherence while neuropsychological status bore a complex relation to adherence. Of the exploratory variables, low family stress were related to better adherence while satisfaction with the home care regimen and convenience ratings were not useful in predicting adherence. No one element of adherence, even objective measures, was capable of classifying adherence, while a multifactorial scheme categorizing adherent, partially adherent and non-adherent groups demonstrated good face validity. CONCLUSIONS Supporting developmentally appropriate sharing of responsibilities for self-care is critical, taking patient neurocognitive status into consideration. Clinicians should evaluate adherence using a multifactorial model that highlights the most salient targets for intervention.
Collapse
Affiliation(s)
- Marsha J Treadwell
- Children's Hospital and Research Center at Oakland, Oakland, California 94609, USA.
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Castro V, Alberto FL, Costa RNP, Lepikson-Neto J, Gualandro SFM, Figueiredo MS, Annichino-Bizzacchi JM, Saad STO, Costa FF. Polymorphism of the human platelet antigen-5 system is a risk factor for occlusive vascular complications in patients with sickle cell anemia. Vox Sang 2004; 87:118-23. [PMID: 15355504 DOI: 10.1111/j.1423-0410.2004.00536.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Polymorphisms of platelet membrane glycoproteins such as human platelet antigen (HPA)-1b, HPA-2b, the -5T/C Kozak sequence and C807T have been described as risk factors for vascular disease. Vaso-occlusion episodes are a common feature of sickle cell anaemia (SCA), leading to complications such as stroke, acute chest syndrome, avascular head femur necrosis and priapism. Complex interactions are involved in vaso-occlusion, and activated platelets may play an important role. These data raised the question of whether platelet polymorphisms could be implicated in occlusive vascular complications (OVC) of SCA. MATERIALS AND METHODS In this study, 97 patients with SCA were analysed in two groups: 34 patients presenting with OVC (SCA-VC) and 63 without these complications (SCA-N). The distribution of the HPA-1, -2 and -5 systems, as well as C807T dimorphism and -5T/C Kozak sequence alleles, was evaluated using DNA-based methods. RESULTS Patients of the SCA-VC group showed a higher frequency of the HPA-5b allele (0.324) compared with those of the SCA-N group (0.111) (chi2 = 13.19, P = 0.0002). None of the other polymorphisms, isolated or associated as haplotypes, demonstrated any correlation with the development of OVC in these patients. CONCLUSIONS The findings of this study suggest that the HPA-5b allele is a genetic risk factor for the development of OVC in patients with SCA. This allele could be explored as a target for the development of new therapeutic approaches.
Collapse
Affiliation(s)
- V Castro
- Hematology and Hemotherapy Center, State University of Campinas-UNICAMP, São Paulo, Brazil.
| | | | | | | | | | | | | | | | | |
Collapse
|