From literature, brain does express AQP1. Generally AQP1 expresses in cell membrane. Regarding which tissues have AQP1 expression, here are a few articles citing expression in various tissues:
Articular cartilage, Pubmed ID: 2007592, 1373524
Brain, Pubmed ID: 15489334
Mesangial cell, Pubmed ID: 14702039
Retinal pigment epithelium, Pubmed ID: 8703970
Uterus, Pubmed ID: 7517253