The trachea surgeon and formerly world-renowned stem cell pioneer Paolo Macchiarini, whose human experimenting left most of his trachea-transplant patients dead or in permanent emergency care, certainly did not intend to restrict himself to regenerating airways. He wanted to grow hearts, and he was likely to have been inspired by his former colleagues in Hannover, Germany.
In a particularly revealing interview with a Russian magazine, Macchiarini explained in spring 2014 how an entire organ can be created:
“You cannot grow an entire organ from the cells of an adult human. Besides the cells, you need something else: donor organ or an artificial carcass”.
Thus, for Macchiarini regenerative medicine was reduced to pressing bone marrow cells into the right mould, either a decellurised donor organ consisting only of collagen fibres, or a plastic scaffold. If the form is of trachea, the bone marrow cells will regenerate a trachea. If the form is that of an oesophagus, they will grow an oesophagus. And if they are seeded of a heart-shaped scaffold, they will produce a real beating heart. This of course is one deeply ignorant and unscientific notion, which blatantly disregards the most basic concepts of developmental biology in favour of medical hubris and false promises. Shockingly, politicians, media, university doctors and even stem cell scientists somehow fell for it. Continue reading “Regenerating in Hannover, Part 1: how Macchiarini got ideas”