January 9, 2023: Mechanism of Blinatumomab (“Blina”)

Tuesday, January 10, 2023 · by kathy howe

The medicine that Sam is currently taking is called blinatumomab or “blina” for short (short i).   This is how it works: 

Blina is what is called a bispecific T cell engager or “BiTE”.  It allows Sam’s T cells to recognize his malignant B Cells. The Blina molecule has 2 receptor molecules on it: 1 is called CD3 and the other is called CD19. Well guess what? His malignant B Cells have CD19 (labeled “tumor antigen” in the diagram) on their cell membranes and his healthy T Cells have CD3 on theirs so Blina works by linking them up!  It’s like puzzle pieces: Blina is the connecting piece. And once it connects the B Cell (malignant) and the T cell (healthy), the process activates the T cell to exert cytotoxic activity on the malignant B cell, destroying it (Wikipedia).

https://en.wikipedia.org/wiki/Blinatumomab

Sam doesn’t have a lot of leukemia but there’s enough that we need to destroy it before his stem cell transplant. Blina is administered by a small, battery powered pump that he carries in a  cross chest black bag and the pump is continuously administering the medicine 24/7 through tubing leading to the port in his chest.. Amazing! And that, of course, means he can go through his normal teen life, as much as possible, which is medicine in and of itself. Yay!

#FULeukemia

#TeamSam

♥ 30 hearts

8 comments

Alan Korb · Tuesday, January 10, 2023
Yeah, I was going to say that (lol). Cheers Sam!
kathy howe · Tuesday, January 10, 2023
😂
shelley watanabe · Tuesday, January 10, 2023
in our thoughts and hearts always....y'all are amazing. HURRAH TEAM SAM
David Hornik · Tuesday, January 10, 2023
Modern medicine is amazing.
Jessi Hempel · Tuesday, January 10, 2023
AGREE. And thanks for explaining.
dave lilly · Tuesday, January 10, 2023
Amazing. We’ve come a long way.
Beth Howe · Wednesday, January 11, 2023
Awesome technology!!
Jennifer White · Wednesday, January 11, 2023
Wow - I’m so impressed with the technology and science in his treatment- and the way you learn it all in such detail and share it with us. You are turning into quite the compelling science writer! So happy to hear this helps Sam live a normal life