TY - JOUR T1 - Bloodstream AQP4 Concentrations in Individuals Experiencing Intracerebral Hemorrhage Linked to Cerebral Amyloid Angiopathy A1 - Norito Kawakami A1 - Shin-ya Satoh A1 - Zuo Li JF - Bulletin of Pioneering Researches of Medical and Clinical Science JO - Bull Pioneer Res Med Clin Sci SN - 3006-2659 Y1 - 2022 VL - 2 IS - 2 DO - 10.51847/w9SThzgjVW SP - 96 EP - 105 N2 - Cerebral amyloid angiopathy (CAA) is a prominent cause of lobar intracerebral hemorrhage (ICH) in elderly populations. Emerging research suggests aquaporin 4 (AQP4) may contribute to the pathology of amyloid-beta-related conditions, including CAA. This study assessed serum AQP4 levels in patients with CAA-associated lobar ICH. Using enzyme-linked immunosorbent assay (ELISA), AQP4 was measured in 60 patients with CAA-related ICH and 19 non-stroke control participants. The patient cohort was further subdivided according to the timing of functional outcome evaluation: mid-term (12 ± 18.6 months) and long-term (38.5 ± 32.9 months) post-ICH. Overall, AQP4 concentrations did not differ significantly between patients and controls; however, lower levels were detected in patients exhibiting specific hemorrhagic patterns, such as having ≥2 lobar ICHs or ≥5 lobar microbleeds on MRI. Notably, individuals who achieved favorable long-term functional recovery had higher circulating AQP4 than those with poor outcomes or controls. These results indicate that AQP4 may serve as a prognostic marker for long-term recovery and might have a protective effect following lobar ICH. UR - https://bprmcs.com/article/bloodstream-aqp4-concentrations-in-individuals-experiencing-intracerebral-hemorrhage-linked-to-cereb-kghvovz4x61z0zq ER -