We do not have an adequate explanation for this phenomenon at present. If a patient is receiving Tysabri every month, receptor concentration remains well above 90 % in all patients. It is still possible that Tysabri has some direct effects on CNS cell types that follows a different time course, but this seems unlikely.
PLEASE NOTE: The information/opinions on this site should be used as an information resource only. This information does not create any patient-HCP relationship, and should not be used as a substitute for professional diagnosis and treatment. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition.