Description. An alkaline phosphatase (ALP) blood test assesses the level of the enzyme alkaline phosphatase in a blood sample. Alkaline phosphatase is an enzyme
, 6. in part because CNS drug exposure is limited by the endothelial tight junctions and elevated expression levels of efflux transporters at the blood–brain barrier (BBB), making it difficult to reach therapeutically relevant drug concentrations at lesion sites.8 A number of brain-penetrant ...
and multiple ALK-tyrosine kinase inhibitors (TKIs) have been sequentially used. Multiple ALK-TKI resistance mutations have been identified from the patients, and several compound mutations, such as I1171N + F1174I or I1171N + L1198H are resistant to all the approved ALK-TKIs. In t...