No, he did not. The opposite, in fact.
From the interview:
"As the disease gradually progresses, follicles on the back of the head and also those on the side of the head also become miniaturized. However, even though the disease has progressed into those areas, there is still a large number of normal follicles left. Based on this, we are currently conducting a human-tissue study using dermal tissues collected from the back of Androgenetic Alopecia patients’ heads in order to verify the possible number of normal follicles which can be collected from such areas, and whether cells collected from such areas have the function needed for follicular regeneration, etc. So far, we have found out that there is a large number of normal follicles on the back of Androgenetic Alopecia patients. We believe that collecting the cells from such areas will definitely result in regeneration of normal follicles."
If you are going to just give me a transcript of the video, we should at least put the answer in the context of the question:
"Certain individuals with advanced androgenetic alopecia experience significant miniaturization of follicles and extensive loss on the sides and back of the head. This is the typical location for donor follicles for transplants with your therapy. As a result, these donor follicles may be extensively affected by Androgenetic Alopecia prior to the procedure. What can people expect form your therapy?"
The question was an inquiry about
androgenetic alopecia.
The question stated that loss was extensive on the sides and back of head, but it did not say
all hair or the entire scalp.
Nevertheless, the question asks about those donor follicles that have been affected by Androgenetic Alopecia.
"So far, we have found out that there is a large number of normal follicles on the back of Androgenetic Alopecia patients"
The response is that as long as there are a
large number of normal follicles, things will be ok. Right, again, the outcome appears to depend on whether or not normal follicles exist. If you recall, my question was about DUPA, a markedly different phenomenon that was NOT discussed in depth in the interview. If you looked at question 3 that I linked as well, Tsuji again clearly says that the quality of the hair regenerated is akin to the quality of the cells harvested. It's not trivial that in the case of DUPA, quality cells exist because as the name of the disease implies, the hairloss is unpatterned and healthy follicles may exist nowhere.
Now how severe would the alopecia have to be before a "large number of normal follicles" is no longer present? I have no idea. Nobody here knows either. Do a large number of follicles viable for this treatment exist in the case of DUPA? I have no idea. Nobody here knows either. Hence I asked in my original question,
"More generally, what is the cut off for donor quality/region that needs to be covered to give eligibility?"
And as far as I can tell, Tsuji has not offered a solution for this case, and the treatment strategy implies that this case might not be easily treatable. I think it is appropriate to ask for clarification from Tsuji.
Couldn't have said it better then That Guy.
I disagree. I don't think my question was answered. Or that it can be answered other than by those involved in performing the research.