Browsing by Author "Lubowa, Samson K."

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    Cerebral malaria is associated with long-term mental health disorders: a cross sectional survey of a long-term cohort
    (Springer (Biomed Central Ltd.), 2016) Idro, Richard; Kakooza-Mwesige, Angelina; Asea, Benjamin; Ssebyala, Keron; Bangirana, Paul; Opoka, Robert O.; Lubowa, Samson K.; Semrud-Clikeman, Margaret; John, Chandy C.; Nalugya, Joyce; Department of Pediatrics, IU School of Medicine
    BACKGROUND: Cerebral malaria (CM) and severe malarial anaemia (SMA) are associated with neuro-developmental impairment in African children, but long-term mental health disorders in these children are not well defined. METHODS: A cohort of children previously exposed to CM (n = 173) or SMA (n = 99) had neurologic assessments performed and screening for behaviour difficulties using the Strengths and Difficulties Questionnaire (SDQ) a median of 21 months after the disease episode. These findings were compared to concurrently recruited community children (CC, n = 108). Participants with SDQ total difficulties score ≥ 17 had a mental health interview with the child and adolescent version of the Mini-International Neuropsychiatric Interview (MINI-KID) and a sample had brain magnetic resonance imaging (MRI). RESULTS: Fifty-five children had SDQ score ≥ 17. On the MINI-KID, these children were classified as having no difficulties (n = 18), behaviour difficulties only (n = 13) or a mental health disorder (n = 24). Behaviour difficulties were seen in similar frequencies in CM (3.5%), SMA (4.0%) and CC (2.8%). In contrast, mental health disorders were most frequent in CM (10.4%), followed by SMA (4.0%) and CC (1.8%). Externalizing disorders (conduct, oppositional defiance and attention deficit hyperactivity) were the most common mental health disorders. The median total coma duration was 72 (IQR 36.0-115.0) h in patients with mental health disorders compared to 48 (IQR 28.5-78.7) h in those without, p = 0.039. Independent risk factors for mental health disorder included neurologic deficit at discharge (OR 4.09 (95% CI 1.60, 10.5) and seizure recurrences during hospitalization, (OR 2.80, 95% CI 1.13, 6.97). Brain MRI findings consistent with small vessel ischaemic neural injury was seen in over half of these children. CONCLUSIONS: Cerebral malaria may predispose children to mental health disorders, possibly as a consequence of ischaemic neural injury. There is urgent need for programmes of follow-up, diagnosis and interventions for these children.
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    Neurofilament Light Chain: A potential biomarker for cerebrovascular disease in children with sickle cell anemia
    (Wiley, 2023) Green, Nancy S.; Rosano, Caterina; Bangirana, Paul; Opoka, Robert; Munube, Deogratias; Kasirye, Philip; Kawooya, Michael; Lubowa, Samson K.; Mupere, Ezekiel; Conroy, Andrea; Minja, Frank J.; Boehme, Amelia K.; Kang, Min Suk; Honig, Lawrence S.; Idro, Richard; Pediatrics, School of Medicine
    Cerebrovascular injury frequently occurs in children with sickle cell anaemia (SCA). Limited access to magnetic resonance imaging and angiography (MRI-MRA) in sub-Saharan Africa impedes detection of clinically unapparent cerebrovascular injury. Blood-based brain biomarkers of cerebral infarcts have been identified in non-SCA adults. Using plasma samples from a well-characterized cross-sectional sample of Ugandan children with SCA, we explored relationships between biomarker levels and MRI-detected cerebral infarcts and transcranial Doppler (TCD) arterial velocity. Testing was performed using a 4-plex panel of brain injury biomarkers, including neurofilament light chain (NfL), a central nervous system neuron-specific protein. Mean biomarker levels from the SCA group (n = 81) were similar to those from non-SCA sibling controls (n = 54). Within the SCA group, NfL levels were significantly higher in those with MRI-detected infarcts compared to no infarcts, and higher with elevated TCD velocity versus normal velocity. Elevated NfL remained strongly associated with MRI-detected infarcts after adjusting for sex and age. All non-SCA controls and SCA participants lacking MRI-detected infarcts had low NfL levels. These data suggest potential utility of plasma-based NfL levels to identify children with SCA cerebrovascular injury. Replication and prospective studies are needed to confirm these novel findings and the clinical utility of NfL versus MRI imaging.